drivers/net/ethernet/intel/i40e/i40e_main.c

   1 /*******************************************************************************
   2  *
   3  * Intel Ethernet Controller XL710 Family Linux Driver
   4  * Copyright(c) 2013 - 2014 Intel Corporation.
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms and conditions of the GNU General Public License,
   8  * version 2, as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  * The full GNU General Public License is included in this distribution in
  19  * the file called "COPYING".
  20  *
  21  * Contact Information:
  22  * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  23  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  24  *
  25  ******************************************************************************/
  26
  27 /* Local includes */
  28 #include "i40e.h"
  29 #ifdef CONFIG_I40E_VXLAN
  30 #include <net/vxlan.h>
  31 #endif
  32
  33 const char i40e_driver_name[] = "i40e";
  34 static const char i40e_driver_string[] =
  35                         "Intel(R) Ethernet Connection XL710 Network Driver";
  36
  37 #define DRV_KERN "-k"
  38
  39 #define DRV_VERSION_MAJOR 0
  40 #define DRV_VERSION_MINOR 3
  41 #define DRV_VERSION_BUILD 36
  42 #define DRV_VERSION __stringify(DRV_VERSION_MAJOR) "." \
  43              __stringify(DRV_VERSION_MINOR) "." \
  44              __stringify(DRV_VERSION_BUILD)    DRV_KERN
  45 const char i40e_driver_version_str[] = DRV_VERSION;
  46 static const char i40e_copyright[] = "Copyright (c) 2013 - 2014 Intel Corporation.";
  47
  48 /* a bit of forward declarations */
  49 static void i40e_vsi_reinit_locked(struct i40e_vsi *vsi);
  50 static void i40e_handle_reset_warning(struct i40e_pf *pf);
  51 static int i40e_add_vsi(struct i40e_vsi *vsi);
  52 static int i40e_add_veb(struct i40e_veb *veb, struct i40e_vsi *vsi);
  53 static int i40e_setup_pf_switch(struct i40e_pf *pf, bool reinit);
  54 static int i40e_setup_misc_vector(struct i40e_pf *pf);
  55 static void i40e_determine_queue_usage(struct i40e_pf *pf);
  56 static int i40e_setup_pf_filter_control(struct i40e_pf *pf);
  57 static void i40e_fdir_sb_setup(struct i40e_pf *pf);
  58 static int i40e_veb_get_bw_info(struct i40e_veb *veb);
  59
  60 /* i40e_pci_tbl - PCI Device ID Table
  61  *
  62  * Last entry must be all 0s
  63  *
  64  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  65  *   Class, Class Mask, private data (not used) }
  66  */
  67 static DEFINE_PCI_DEVICE_TABLE(i40e_pci_tbl) = {
  68         {PCI_VDEVICE(INTEL, I40E_DEV_ID_SFP_XL710), 0},
  69         {PCI_VDEVICE(INTEL, I40E_DEV_ID_SFP_X710), 0},
  70         {PCI_VDEVICE(INTEL, I40E_DEV_ID_QEMU), 0},
  71         {PCI_VDEVICE(INTEL, I40E_DEV_ID_KX_A), 0},
  72         {PCI_VDEVICE(INTEL, I40E_DEV_ID_KX_B), 0},
  73         {PCI_VDEVICE(INTEL, I40E_DEV_ID_KX_C), 0},
  74         {PCI_VDEVICE(INTEL, I40E_DEV_ID_KX_D), 0},
  75         {PCI_VDEVICE(INTEL, I40E_DEV_ID_QSFP_A), 0},
  76         {PCI_VDEVICE(INTEL, I40E_DEV_ID_QSFP_B), 0},
  77         {PCI_VDEVICE(INTEL, I40E_DEV_ID_QSFP_C), 0},
  78         /* required last entry */
  79         {0, }
  80 };
  81 MODULE_DEVICE_TABLE(pci, i40e_pci_tbl);
  82
  83 #define I40E_MAX_VF_COUNT 128
  84 static int debug = -1;
  85 module_param(debug, int, 0);
  86 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
  87
  88 MODULE_AUTHOR("Intel Corporation, <e1000-devel@lists.sourceforge.net>");
  89 MODULE_DESCRIPTION("Intel(R) Ethernet Connection XL710 Network Driver");
  90 MODULE_LICENSE("GPL");
  91 MODULE_VERSION(DRV_VERSION);
  92
  93 /**
  94  * i40e_allocate_dma_mem_d - OS specific memory alloc for shared code
  95  * @hw:   pointer to the HW structure
  96  * @mem:  ptr to mem struct to fill out
  97  * @size: size of memory requested
  98  * @alignment: what to align the allocation to
  99  **/
 100 int i40e_allocate_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem,
 101                             u64 size, u32 alignment)
 102 {
 103         struct i40e_pf *pf = (struct i40e_pf *)hw->back;
 104
 105         mem->size = ALIGN(size, alignment);
 106         mem->va = dma_zalloc_coherent(&pf->pdev->dev, mem->size,
 107                                       &mem->pa, GFP_KERNEL);
 108         if (!mem->va)
 109                 return -ENOMEM;
 110
 111         return 0;
 112 }
 113
 114 /**
 115  * i40e_free_dma_mem_d - OS specific memory free for shared code
 116  * @hw:   pointer to the HW structure
 117  * @mem:  ptr to mem struct to free
 118  **/
 119 int i40e_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem)
 120 {
 121         struct i40e_pf *pf = (struct i40e_pf *)hw->back;
 122
 123         dma_free_coherent(&pf->pdev->dev, mem->size, mem->va, mem->pa);
 124         mem->va = NULL;
 125         mem->pa = 0;
 126         mem->size = 0;
 127
 128         return 0;
 129 }
 130
 131 /**
 132  * i40e_allocate_virt_mem_d - OS specific memory alloc for shared code
 133  * @hw:   pointer to the HW structure
 134  * @mem:  ptr to mem struct to fill out
 135  * @size: size of memory requested
 136  **/
 137 int i40e_allocate_virt_mem_d(struct i40e_hw *hw, struct i40e_virt_mem *mem,
 138                              u32 size)
 139 {
 140         mem->size = size;
 141         mem->va = kzalloc(size, GFP_KERNEL);
 142
 143         if (!mem->va)
 144                 return -ENOMEM;
 145
 146         return 0;
 147 }
 148
 149 /**
 150  * i40e_free_virt_mem_d - OS specific memory free for shared code
 151  * @hw:   pointer to the HW structure
 152  * @mem:  ptr to mem struct to free
 153  **/
 154 int i40e_free_virt_mem_d(struct i40e_hw *hw, struct i40e_virt_mem *mem)
 155 {
 156         /* it's ok to kfree a NULL pointer */
 157         kfree(mem->va);
 158         mem->va = NULL;
 159         mem->size = 0;
 160
 161         return 0;
 162 }
 163
 164 /**
 165  * i40e_get_lump - find a lump of free generic resource
 166  * @pf: board private structure
 167  * @pile: the pile of resource to search
 168  * @needed: the number of items needed
 169  * @id: an owner id to stick on the items assigned
 170  *
 171  * Returns the base item index of the lump, or negative for error
 172  *
 173  * The search_hint trick and lack of advanced fit-finding only work
 174  * because we're highly likely to have all the same size lump requests.
 175  * Linear search time and any fragmentation should be minimal.
 176  **/
 177 static int i40e_get_lump(struct i40e_pf *pf, struct i40e_lump_tracking *pile,
 178                          u16 needed, u16 id)
 179 {
 180         int ret = -ENOMEM;
 181         int i, j;
 182
 183         if (!pile || needed == 0 || id >= I40E_PILE_VALID_BIT) {
 184                 dev_info(&pf->pdev->dev,
 185                          "param err: pile=%p needed=%d id=0x%04x\n",
 186                          pile, needed, id);
 187                 return -EINVAL;
 188         }
 189
 190         /* start the linear search with an imperfect hint */
 191         i = pile->search_hint;
 192         while (i < pile->num_entries) {
 193                 /* skip already allocated entries */
 194                 if (pile->list[i] & I40E_PILE_VALID_BIT) {
 195                         i++;
 196                         continue;
 197                 }
 198
 199                 /* do we have enough in this lump? */
 200                 for (j = 0; (j < needed) && ((i+j) < pile->num_entries); j++) {
 201                         if (pile->list[i+j] & I40E_PILE_VALID_BIT)
 202                                 break;
 203                 }
 204
 205                 if (j == needed) {
 206                         /* there was enough, so assign it to the requestor */
 207                         for (j = 0; j < needed; j++)
 208                                 pile->list[i+j] = id | I40E_PILE_VALID_BIT;
 209                         ret = i;
 210                         pile->search_hint = i + j;
 211                         break;
 212                 } else {
 213                         /* not enough, so skip over it and continue looking */
 214                         i += j;
 215                 }
 216         }
 217
 218         return ret;
 219 }
 220
 221 /**
 222  * i40e_put_lump - return a lump of generic resource
 223  * @pile: the pile of resource to search
 224  * @index: the base item index
 225  * @id: the owner id of the items assigned
 226  *
 227  * Returns the count of items in the lump
 228  **/
 229 static int i40e_put_lump(struct i40e_lump_tracking *pile, u16 index, u16 id)
 230 {
 231         int valid_id = (id | I40E_PILE_VALID_BIT);
 232         int count = 0;
 233         int i;
 234
 235         if (!pile || index >= pile->num_entries)
 236                 return -EINVAL;
 237
 238         for (i = index;
 239              i < pile->num_entries && pile->list[i] == valid_id;
 240              i++) {
 241                 pile->list[i] = 0;
 242                 count++;
 243         }
 244
 245         if (count && index < pile->search_hint)
 246                 pile->search_hint = index;
 247
 248         return count;
 249 }
 250
 251 /**
 252  * i40e_service_event_schedule - Schedule the service task to wake up
 253  * @pf: board private structure
 254  *
 255  * If not already scheduled, this puts the task into the work queue
 256  **/
 257 static void i40e_service_event_schedule(struct i40e_pf *pf)
 258 {
 259         if (!test_bit(__I40E_DOWN, &pf->state) &&
 260             !test_bit(__I40E_RESET_RECOVERY_PENDING, &pf->state) &&
 261             !test_and_set_bit(__I40E_SERVICE_SCHED, &pf->state))
 262                 schedule_work(&pf->service_task);
 263 }
 264
 265 /**
 266  * i40e_tx_timeout - Respond to a Tx Hang
 267  * @netdev: network interface device structure
 268  *
 269  * If any port has noticed a Tx timeout, it is likely that the whole
 270  * device is munged, not just the one netdev port, so go for the full
 271  * reset.
 272  **/
 273 static void i40e_tx_timeout(struct net_device *netdev)
 274 {
 275         struct i40e_netdev_priv *np = netdev_priv(netdev);
 276         struct i40e_vsi *vsi = np->vsi;
 277         struct i40e_pf *pf = vsi->back;
 278
 279         pf->tx_timeout_count++;
 280
 281         if (time_after(jiffies, (pf->tx_timeout_last_recovery + HZ*20)))
 282                 pf->tx_timeout_recovery_level = 0;
 283         pf->tx_timeout_last_recovery = jiffies;
 284         netdev_info(netdev, "tx_timeout recovery level %d\n",
 285                     pf->tx_timeout_recovery_level);
 286
 287         switch (pf->tx_timeout_recovery_level) {
 288         case 0:
 289                 /* disable and re-enable queues for the VSI */
 290                 if (in_interrupt()) {
 291                         set_bit(__I40E_REINIT_REQUESTED, &pf->state);
 292                         set_bit(__I40E_REINIT_REQUESTED, &vsi->state);
 293                 } else {
 294                         i40e_vsi_reinit_locked(vsi);
 295                 }
 296                 break;
 297         case 1:
 298                 set_bit(__I40E_PF_RESET_REQUESTED, &pf->state);
 299                 break;
 300         case 2:
 301                 set_bit(__I40E_CORE_RESET_REQUESTED, &pf->state);
 302                 break;
 303         case 3:
 304                 set_bit(__I40E_GLOBAL_RESET_REQUESTED, &pf->state);
 305                 break;
 306         default:
 307                 netdev_err(netdev, "tx_timeout recovery unsuccessful\n");
 308                 set_bit(__I40E_DOWN, &vsi->state);
 309                 i40e_down(vsi);
 310                 break;
 311         }
 312         i40e_service_event_schedule(pf);
 313         pf->tx_timeout_recovery_level++;
 314 }
 315
 316 /**
 317  * i40e_release_rx_desc - Store the new tail and head values
 318  * @rx_ring: ring to bump
 319  * @val: new head index
 320  **/
 321 static inline void i40e_release_rx_desc(struct i40e_ring *rx_ring, u32 val)
 322 {
 323         rx_ring->next_to_use = val;
 324
 325         /* Force memory writes to complete before letting h/w
 326          * know there are new descriptors to fetch.  (Only
 327          * applicable for weak-ordered memory model archs,
 328          * such as IA-64).
 329          */
 330         wmb();
 331         writel(val, rx_ring->tail);
 332 }
 333
 334 /**
 335  * i40e_get_vsi_stats_struct - Get System Network Statistics
 336  * @vsi: the VSI we care about
 337  *
 338  * Returns the address of the device statistics structure.
 339  * The statistics are actually updated from the service task.
 340  **/
 341 struct rtnl_link_stats64 *i40e_get_vsi_stats_struct(struct i40e_vsi *vsi)
 342 {
 343         return &vsi->net_stats;
 344 }
 345
 346 /**
 347  * i40e_get_netdev_stats_struct - Get statistics for netdev interface
 348  * @netdev: network interface device structure
 349  *
 350  * Returns the address of the device statistics structure.
 351  * The statistics are actually updated from the service task.
 352  **/
 353 static struct rtnl_link_stats64 *i40e_get_netdev_stats_struct(
 354                                              struct net_device *netdev,
 355                                              struct rtnl_link_stats64 *stats)
 356 {
 357         struct i40e_netdev_priv *np = netdev_priv(netdev);
 358         struct i40e_vsi *vsi = np->vsi;
 359         struct rtnl_link_stats64 *vsi_stats = i40e_get_vsi_stats_struct(vsi);
 360         int i;
 361
 362         if (test_bit(__I40E_DOWN, &vsi->state))
 363                 return stats;
 364
 365         if (!vsi->tx_rings)
 366                 return stats;
 367
 368         rcu_read_lock();
 369         for (i = 0; i < vsi->num_queue_pairs; i++) {
 370                 struct i40e_ring *tx_ring, *rx_ring;
 371                 u64 bytes, packets;
 372                 unsigned int start;
 373
 374                 tx_ring = ACCESS_ONCE(vsi->tx_rings[i]);
 375                 if (!tx_ring)
 376                         continue;
 377
 378                 do {
 379                         start = u64_stats_fetch_begin_irq(&tx_ring->syncp);
 380                         packets = tx_ring->stats.packets;
 381                         bytes   = tx_ring->stats.bytes;
 382                 } while (u64_stats_fetch_retry_irq(&tx_ring->syncp, start));
 383
 384                 stats->tx_packets += packets;
 385                 stats->tx_bytes   += bytes;
 386                 rx_ring = &tx_ring[1];
 387
 388                 do {
 389                         start = u64_stats_fetch_begin_irq(&rx_ring->syncp);
 390                         packets = rx_ring->stats.packets;
 391                         bytes   = rx_ring->stats.bytes;
 392                 } while (u64_stats_fetch_retry_irq(&rx_ring->syncp, start));
 393
 394                 stats->rx_packets += packets;
 395                 stats->rx_bytes   += bytes;
 396         }
 397         rcu_read_unlock();
 398
 399         /* following stats updated by ixgbe_watchdog_task() */
 400         stats->multicast        = vsi_stats->multicast;
 401         stats->tx_errors        = vsi_stats->tx_errors;
 402         stats->tx_dropped       = vsi_stats->tx_dropped;
 403         stats->rx_errors        = vsi_stats->rx_errors;
 404         stats->rx_crc_errors    = vsi_stats->rx_crc_errors;
 405         stats->rx_length_errors = vsi_stats->rx_length_errors;
 406
 407         return stats;
 408 }
 409
 410 /**
 411  * i40e_vsi_reset_stats - Resets all stats of the given vsi
 412  * @vsi: the VSI to have its stats reset
 413  **/
 414 void i40e_vsi_reset_stats(struct i40e_vsi *vsi)
 415 {
 416         struct rtnl_link_stats64 *ns;
 417         int i;
 418
 419         if (!vsi)
 420                 return;
 421
 422         ns = i40e_get_vsi_stats_struct(vsi);
 423         memset(ns, 0, sizeof(*ns));
 424         memset(&vsi->net_stats_offsets, 0, sizeof(vsi->net_stats_offsets));
 425         memset(&vsi->eth_stats, 0, sizeof(vsi->eth_stats));
 426         memset(&vsi->eth_stats_offsets, 0, sizeof(vsi->eth_stats_offsets));
 427         if (vsi->rx_rings && vsi->rx_rings[0]) {
 428                 for (i = 0; i < vsi->num_queue_pairs; i++) {
 429                         memset(&vsi->rx_rings[i]->stats, 0 ,
 430                                sizeof(vsi->rx_rings[i]->stats));
 431                         memset(&vsi->rx_rings[i]->rx_stats, 0 ,
 432                                sizeof(vsi->rx_rings[i]->rx_stats));
 433                         memset(&vsi->tx_rings[i]->stats, 0 ,
 434                                sizeof(vsi->tx_rings[i]->stats));
 435                         memset(&vsi->tx_rings[i]->tx_stats, 0,
 436                                sizeof(vsi->tx_rings[i]->tx_stats));
 437                 }
 438         }
 439         vsi->stat_offsets_loaded = false;
 440 }
 441
 442 /**
 443  * i40e_pf_reset_stats - Reset all of the stats for the given pf
 444  * @pf: the PF to be reset
 445  **/
 446 void i40e_pf_reset_stats(struct i40e_pf *pf)
 447 {
 448         memset(&pf->stats, 0, sizeof(pf->stats));
 449         memset(&pf->stats_offsets, 0, sizeof(pf->stats_offsets));
 450         pf->stat_offsets_loaded = false;
 451 }
 452
 453 /**
 454  * i40e_stat_update48 - read and update a 48 bit stat from the chip
 455  * @hw: ptr to the hardware info
 456  * @hireg: the high 32 bit reg to read
 457  * @loreg: the low 32 bit reg to read
 458  * @offset_loaded: has the initial offset been loaded yet
 459  * @offset: ptr to current offset value
 460  * @stat: ptr to the stat
 461  *
 462  * Since the device stats are not reset at PFReset, they likely will not
 463  * be zeroed when the driver starts.  We'll save the first values read
 464  * and use them as offsets to be subtracted from the raw values in order
 465  * to report stats that count from zero.  In the process, we also manage
 466  * the potential roll-over.
 467  **/
 468 static void i40e_stat_update48(struct i40e_hw *hw, u32 hireg, u32 loreg,
 469                                bool offset_loaded, u64 *offset, u64 *stat)
 470 {
 471         u64 new_data;
 472
 473         if (hw->device_id == I40E_DEV_ID_QEMU) {
 474                 new_data = rd32(hw, loreg);
 475                 new_data |= ((u64)(rd32(hw, hireg) & 0xFFFF)) << 32;
 476         } else {
 477                 new_data = rd64(hw, loreg);
 478         }
 479         if (!offset_loaded)
 480                 *offset = new_data;
 481         if (likely(new_data >= *offset))
 482                 *stat = new_data - *offset;
 483         else
 484                 *stat = (new_data + ((u64)1 << 48)) - *offset;
 485         *stat &= 0xFFFFFFFFFFFFULL;
 486 }
 487
 488 /**
 489  * i40e_stat_update32 - read and update a 32 bit stat from the chip
 490  * @hw: ptr to the hardware info
 491  * @reg: the hw reg to read
 492  * @offset_loaded: has the initial offset been loaded yet
 493  * @offset: ptr to current offset value
 494  * @stat: ptr to the stat
 495  **/
 496 static void i40e_stat_update32(struct i40e_hw *hw, u32 reg,
 497                                bool offset_loaded, u64 *offset, u64 *stat)
 498 {
 499         u32 new_data;
 500
 501         new_data = rd32(hw, reg);
 502         if (!offset_loaded)
 503                 *offset = new_data;
 504         if (likely(new_data >= *offset))
 505                 *stat = (u32)(new_data - *offset);
 506         else
 507                 *stat = (u32)((new_data + ((u64)1 << 32)) - *offset);
 508 }
 509
 510 /**
 511  * i40e_update_eth_stats - Update VSI-specific ethernet statistics counters.
 512  * @vsi: the VSI to be updated
 513  **/
 514 void i40e_update_eth_stats(struct i40e_vsi *vsi)
 515 {
 516         int stat_idx = le16_to_cpu(vsi->info.stat_counter_idx);
 517         struct i40e_pf *pf = vsi->back;
 518         struct i40e_hw *hw = &pf->hw;
 519         struct i40e_eth_stats *oes;
 520         struct i40e_eth_stats *es;     /* device's eth stats */
 521
 522         es = &vsi->eth_stats;
 523         oes = &vsi->eth_stats_offsets;
 524
 525         /* Gather up the stats that the hw collects */
 526         i40e_stat_update32(hw, I40E_GLV_TEPC(stat_idx),
 527                            vsi->stat_offsets_loaded,
 528                            &oes->tx_errors, &es->tx_errors);
 529         i40e_stat_update32(hw, I40E_GLV_RDPC(stat_idx),
 530                            vsi->stat_offsets_loaded,
 531                            &oes->rx_discards, &es->rx_discards);
 532
 533         i40e_stat_update48(hw, I40E_GLV_GORCH(stat_idx),
 534                            I40E_GLV_GORCL(stat_idx),
 535                            vsi->stat_offsets_loaded,
 536                            &oes->rx_bytes, &es->rx_bytes);
 537         i40e_stat_update48(hw, I40E_GLV_UPRCH(stat_idx),
 538                            I40E_GLV_UPRCL(stat_idx),
 539                            vsi->stat_offsets_loaded,
 540                            &oes->rx_unicast, &es->rx_unicast);
 541         i40e_stat_update48(hw, I40E_GLV_MPRCH(stat_idx),
 542                            I40E_GLV_MPRCL(stat_idx),
 543                            vsi->stat_offsets_loaded,
 544                            &oes->rx_multicast, &es->rx_multicast);
 545         i40e_stat_update48(hw, I40E_GLV_BPRCH(stat_idx),
 546                            I40E_GLV_BPRCL(stat_idx),
 547                            vsi->stat_offsets_loaded,
 548                            &oes->rx_broadcast, &es->rx_broadcast);
 549
 550         i40e_stat_update48(hw, I40E_GLV_GOTCH(stat_idx),
 551                            I40E_GLV_GOTCL(stat_idx),
 552                            vsi->stat_offsets_loaded,
 553                            &oes->tx_bytes, &es->tx_bytes);
 554         i40e_stat_update48(hw, I40E_GLV_UPTCH(stat_idx),
 555                            I40E_GLV_UPTCL(stat_idx),
 556                            vsi->stat_offsets_loaded,
 557                            &oes->tx_unicast, &es->tx_unicast);
 558         i40e_stat_update48(hw, I40E_GLV_MPTCH(stat_idx),
 559                            I40E_GLV_MPTCL(stat_idx),
 560                            vsi->stat_offsets_loaded,
 561                            &oes->tx_multicast, &es->tx_multicast);
 562         i40e_stat_update48(hw, I40E_GLV_BPTCH(stat_idx),
 563                            I40E_GLV_BPTCL(stat_idx),
 564                            vsi->stat_offsets_loaded,
 565                            &oes->tx_broadcast, &es->tx_broadcast);
 566         vsi->stat_offsets_loaded = true;
 567 }
 568
 569 /**
 570  * i40e_update_veb_stats - Update Switch component statistics
 571  * @veb: the VEB being updated
 572  **/
 573 static void i40e_update_veb_stats(struct i40e_veb *veb)
 574 {
 575         struct i40e_pf *pf = veb->pf;
 576         struct i40e_hw *hw = &pf->hw;
 577         struct i40e_eth_stats *oes;
 578         struct i40e_eth_stats *es;     /* device's eth stats */
 579         int idx = 0;
 580
 581         idx = veb->stats_idx;
 582         es = &veb->stats;
 583         oes = &veb->stats_offsets;
 584
 585         /* Gather up the stats that the hw collects */
 586         i40e_stat_update32(hw, I40E_GLSW_TDPC(idx),
 587                            veb->stat_offsets_loaded,
 588                            &oes->tx_discards, &es->tx_discards);
 589         if (hw->revision_id > 0)
 590                 i40e_stat_update32(hw, I40E_GLSW_RUPP(idx),
 591                                    veb->stat_offsets_loaded,
 592                                    &oes->rx_unknown_protocol,
 593                                    &es->rx_unknown_protocol);
 594         i40e_stat_update48(hw, I40E_GLSW_GORCH(idx), I40E_GLSW_GORCL(idx),
 595                            veb->stat_offsets_loaded,
 596                            &oes->rx_bytes, &es->rx_bytes);
 597         i40e_stat_update48(hw, I40E_GLSW_UPRCH(idx), I40E_GLSW_UPRCL(idx),
 598                            veb->stat_offsets_loaded,
 599                            &oes->rx_unicast, &es->rx_unicast);
 600         i40e_stat_update48(hw, I40E_GLSW_MPRCH(idx), I40E_GLSW_MPRCL(idx),
 601                            veb->stat_offsets_loaded,
 602                            &oes->rx_multicast, &es->rx_multicast);
 603         i40e_stat_update48(hw, I40E_GLSW_BPRCH(idx), I40E_GLSW_BPRCL(idx),
 604                            veb->stat_offsets_loaded,
 605                            &oes->rx_broadcast, &es->rx_broadcast);
 606
 607         i40e_stat_update48(hw, I40E_GLSW_GOTCH(idx), I40E_GLSW_GOTCL(idx),
 608                            veb->stat_offsets_loaded,
 609                            &oes->tx_bytes, &es->tx_bytes);
 610         i40e_stat_update48(hw, I40E_GLSW_UPTCH(idx), I40E_GLSW_UPTCL(idx),
 611                            veb->stat_offsets_loaded,
 612                            &oes->tx_unicast, &es->tx_unicast);
 613         i40e_stat_update48(hw, I40E_GLSW_MPTCH(idx), I40E_GLSW_MPTCL(idx),
 614                            veb->stat_offsets_loaded,
 615                            &oes->tx_multicast, &es->tx_multicast);
 616         i40e_stat_update48(hw, I40E_GLSW_BPTCH(idx), I40E_GLSW_BPTCL(idx),
 617                            veb->stat_offsets_loaded,
 618                            &oes->tx_broadcast, &es->tx_broadcast);
 619         veb->stat_offsets_loaded = true;
 620 }
 621
 622 /**
 623  * i40e_update_link_xoff_rx - Update XOFF received in link flow control mode
 624  * @pf: the corresponding PF
 625  *
 626  * Update the Rx XOFF counter (PAUSE frames) in link flow control mode
 627  **/
 628 static void i40e_update_link_xoff_rx(struct i40e_pf *pf)
 629 {
 630         struct i40e_hw_port_stats *osd = &pf->stats_offsets;
 631         struct i40e_hw_port_stats *nsd = &pf->stats;
 632         struct i40e_hw *hw = &pf->hw;
 633         u64 xoff = 0;
 634         u16 i, v;
 635
 636         if ((hw->fc.current_mode != I40E_FC_FULL) &&
 637             (hw->fc.current_mode != I40E_FC_RX_PAUSE))
 638                 return;
 639
 640         xoff = nsd->link_xoff_rx;
 641         i40e_stat_update32(hw, I40E_GLPRT_LXOFFRXC(hw->port),
 642                            pf->stat_offsets_loaded,
 643                            &osd->link_xoff_rx, &nsd->link_xoff_rx);
 644
 645         /* No new LFC xoff rx */
 646         if (!(nsd->link_xoff_rx - xoff))
 647                 return;
 648
 649         /* Clear the __I40E_HANG_CHECK_ARMED bit for all Tx rings */
 650         for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
 651                 struct i40e_vsi *vsi = pf->vsi[v];
 652
 653                 if (!vsi)
 654                         continue;
 655
 656                 for (i = 0; i < vsi->num_queue_pairs; i++) {
 657                         struct i40e_ring *ring = vsi->tx_rings[i];
 658                         clear_bit(__I40E_HANG_CHECK_ARMED, &ring->state);
 659                 }
 660         }
 661 }
 662
 663 /**
 664  * i40e_update_prio_xoff_rx - Update XOFF received in PFC mode
 665  * @pf: the corresponding PF
 666  *
 667  * Update the Rx XOFF counter (PAUSE frames) in PFC mode
 668  **/
 669 static void i40e_update_prio_xoff_rx(struct i40e_pf *pf)
 670 {
 671         struct i40e_hw_port_stats *osd = &pf->stats_offsets;
 672         struct i40e_hw_port_stats *nsd = &pf->stats;
 673         bool xoff[I40E_MAX_TRAFFIC_CLASS] = {false};
 674         struct i40e_dcbx_config *dcb_cfg;
 675         struct i40e_hw *hw = &pf->hw;
 676         u16 i, v;
 677         u8 tc;
 678
 679         dcb_cfg = &hw->local_dcbx_config;
 680
 681         /* See if DCB enabled with PFC TC */
 682         if (!(pf->flags & I40E_FLAG_DCB_ENABLED) ||
 683             !(dcb_cfg->pfc.pfcenable)) {
 684                 i40e_update_link_xoff_rx(pf);
 685                 return;
 686         }
 687
 688         for (i = 0; i < I40E_MAX_USER_PRIORITY; i++) {
 689                 u64 prio_xoff = nsd->priority_xoff_rx[i];
 690                 i40e_stat_update32(hw, I40E_GLPRT_PXOFFRXC(hw->port, i),
 691                                    pf->stat_offsets_loaded,
 692                                    &osd->priority_xoff_rx[i],
 693                                    &nsd->priority_xoff_rx[i]);
 694
 695                 /* No new PFC xoff rx */
 696                 if (!(nsd->priority_xoff_rx[i] - prio_xoff))
 697                         continue;
 698                 /* Get the TC for given priority */
 699                 tc = dcb_cfg->etscfg.prioritytable[i];
 700                 xoff[tc] = true;
 701         }
 702
 703         /* Clear the __I40E_HANG_CHECK_ARMED bit for Tx rings */
 704         for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
 705                 struct i40e_vsi *vsi = pf->vsi[v];
 706
 707                 if (!vsi)
 708                         continue;
 709
 710                 for (i = 0; i < vsi->num_queue_pairs; i++) {
 711                         struct i40e_ring *ring = vsi->tx_rings[i];
 712
 713                         tc = ring->dcb_tc;
 714                         if (xoff[tc])
 715                                 clear_bit(__I40E_HANG_CHECK_ARMED,
 716                                           &ring->state);
 717                 }
 718         }
 719 }
 720
 721 /**
 722  * i40e_update_stats - Update the board statistics counters.
 723  * @vsi: the VSI to be updated
 724  *
 725  * There are a few instances where we store the same stat in a
 726  * couple of different structs.  This is partly because we have
 727  * the netdev stats that need to be filled out, which is slightly
 728  * different from the "eth_stats" defined by the chip and used in
 729  * VF communications.  We sort it all out here in a central place.
 730  **/
 731 void i40e_update_stats(struct i40e_vsi *vsi)
 732 {
 733         struct i40e_pf *pf = vsi->back;
 734         struct i40e_hw *hw = &pf->hw;
 735         struct rtnl_link_stats64 *ons;
 736         struct rtnl_link_stats64 *ns;   /* netdev stats */
 737         struct i40e_eth_stats *oes;
 738         struct i40e_eth_stats *es;     /* device's eth stats */
 739         u32 tx_restart, tx_busy;
 740         u32 rx_page, rx_buf;
 741         u64 rx_p, rx_b;
 742         u64 tx_p, tx_b;
 743         int i;
 744         u16 q;
 745
 746         if (test_bit(__I40E_DOWN, &vsi->state) ||
 747             test_bit(__I40E_CONFIG_BUSY, &pf->state))
 748                 return;
 749
 750         ns = i40e_get_vsi_stats_struct(vsi);
 751         ons = &vsi->net_stats_offsets;
 752         es = &vsi->eth_stats;
 753         oes = &vsi->eth_stats_offsets;
 754
 755         /* Gather up the netdev and vsi stats that the driver collects
 756          * on the fly during packet processing
 757          */
 758         rx_b = rx_p = 0;
 759         tx_b = tx_p = 0;
 760         tx_restart = tx_busy = 0;
 761         rx_page = 0;
 762         rx_buf = 0;
 763         rcu_read_lock();
 764         for (q = 0; q < vsi->num_queue_pairs; q++) {
 765                 struct i40e_ring *p;
 766                 u64 bytes, packets;
 767                 unsigned int start;
 768
 769                 /* locate Tx ring */
 770                 p = ACCESS_ONCE(vsi->tx_rings[q]);
 771
 772                 do {
 773                         start = u64_stats_fetch_begin_irq(&p->syncp);
 774                         packets = p->stats.packets;
 775                         bytes = p->stats.bytes;
 776                 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
 777                 tx_b += bytes;
 778                 tx_p += packets;
 779                 tx_restart += p->tx_stats.restart_queue;
 780                 tx_busy += p->tx_stats.tx_busy;
 781
 782                 /* Rx queue is part of the same block as Tx queue */
 783                 p = &p[1];
 784                 do {
 785                         start = u64_stats_fetch_begin_irq(&p->syncp);
 786                         packets = p->stats.packets;
 787                         bytes = p->stats.bytes;
 788                 } while (u64_stats_fetch_retry_irq(&p->syncp, start));
 789                 rx_b += bytes;
 790                 rx_p += packets;
 791                 rx_buf += p->rx_stats.alloc_buff_failed;
 792                 rx_page += p->rx_stats.alloc_page_failed;
 793         }
 794         rcu_read_unlock();
 795         vsi->tx_restart = tx_restart;
 796         vsi->tx_busy = tx_busy;
 797         vsi->rx_page_failed = rx_page;
 798         vsi->rx_buf_failed = rx_buf;
 799
 800         ns->rx_packets = rx_p;
 801         ns->rx_bytes = rx_b;
 802         ns->tx_packets = tx_p;
 803         ns->tx_bytes = tx_b;
 804
 805         i40e_update_eth_stats(vsi);
 806         /* update netdev stats from eth stats */
 807         ons->rx_errors = oes->rx_errors;
 808         ns->rx_errors = es->rx_errors;
 809         ons->tx_errors = oes->tx_errors;
 810         ns->tx_errors = es->tx_errors;
 811         ons->multicast = oes->rx_multicast;
 812         ns->multicast = es->rx_multicast;
 813         ons->tx_dropped = oes->tx_discards;
 814         ns->tx_dropped = es->tx_discards;
 815
 816         /* Get the port data only if this is the main PF VSI */
 817         if (vsi == pf->vsi[pf->lan_vsi]) {
 818                 struct i40e_hw_port_stats *nsd = &pf->stats;
 819                 struct i40e_hw_port_stats *osd = &pf->stats_offsets;
 820
 821                 i40e_stat_update48(hw, I40E_GLPRT_GORCH(hw->port),
 822                                    I40E_GLPRT_GORCL(hw->port),
 823                                    pf->stat_offsets_loaded,
 824                                    &osd->eth.rx_bytes, &nsd->eth.rx_bytes);
 825                 i40e_stat_update48(hw, I40E_GLPRT_GOTCH(hw->port),
 826                                    I40E_GLPRT_GOTCL(hw->port),
 827                                    pf->stat_offsets_loaded,
 828                                    &osd->eth.tx_bytes, &nsd->eth.tx_bytes);
 829                 i40e_stat_update32(hw, I40E_GLPRT_RDPC(hw->port),
 830                                    pf->stat_offsets_loaded,
 831                                    &osd->eth.rx_discards,
 832                                    &nsd->eth.rx_discards);
 833                 i40e_stat_update32(hw, I40E_GLPRT_TDPC(hw->port),
 834                                    pf->stat_offsets_loaded,
 835                                    &osd->eth.tx_discards,
 836                                    &nsd->eth.tx_discards);
 837                 i40e_stat_update48(hw, I40E_GLPRT_MPRCH(hw->port),
 838                                    I40E_GLPRT_MPRCL(hw->port),
 839                                    pf->stat_offsets_loaded,
 840                                    &osd->eth.rx_multicast,
 841                                    &nsd->eth.rx_multicast);
 842
 843                 i40e_stat_update32(hw, I40E_GLPRT_TDOLD(hw->port),
 844                                    pf->stat_offsets_loaded,
 845                                    &osd->tx_dropped_link_down,
 846                                    &nsd->tx_dropped_link_down);
 847
 848                 i40e_stat_update32(hw, I40E_GLPRT_CRCERRS(hw->port),
 849                                    pf->stat_offsets_loaded,
 850                                    &osd->crc_errors, &nsd->crc_errors);
 851                 ns->rx_crc_errors = nsd->crc_errors;
 852
 853                 i40e_stat_update32(hw, I40E_GLPRT_ILLERRC(hw->port),
 854                                    pf->stat_offsets_loaded,
 855                                    &osd->illegal_bytes, &nsd->illegal_bytes);
 856                 ns->rx_errors = nsd->crc_errors
 857                                 + nsd->illegal_bytes;
 858
 859                 i40e_stat_update32(hw, I40E_GLPRT_MLFC(hw->port),
 860                                    pf->stat_offsets_loaded,
 861                                    &osd->mac_local_faults,
 862                                    &nsd->mac_local_faults);
 863                 i40e_stat_update32(hw, I40E_GLPRT_MRFC(hw->port),
 864                                    pf->stat_offsets_loaded,
 865                                    &osd->mac_remote_faults,
 866                                    &nsd->mac_remote_faults);
 867
 868                 i40e_stat_update32(hw, I40E_GLPRT_RLEC(hw->port),
 869                                    pf->stat_offsets_loaded,
 870                                    &osd->rx_length_errors,
 871                                    &nsd->rx_length_errors);
 872                 ns->rx_length_errors = nsd->rx_length_errors;
 873
 874                 i40e_stat_update32(hw, I40E_GLPRT_LXONRXC(hw->port),
 875                                    pf->stat_offsets_loaded,
 876                                    &osd->link_xon_rx, &nsd->link_xon_rx);
 877                 i40e_stat_update32(hw, I40E_GLPRT_LXONTXC(hw->port),
 878                                    pf->stat_offsets_loaded,
 879                                    &osd->link_xon_tx, &nsd->link_xon_tx);
 880                 i40e_update_prio_xoff_rx(pf);  /* handles I40E_GLPRT_LXOFFRXC */
 881                 i40e_stat_update32(hw, I40E_GLPRT_LXOFFTXC(hw->port),
 882                                    pf->stat_offsets_loaded,
 883                                    &osd->link_xoff_tx, &nsd->link_xoff_tx);
 884
 885                 for (i = 0; i < 8; i++) {
 886                         i40e_stat_update32(hw, I40E_GLPRT_PXONRXC(hw->port, i),
 887                                            pf->stat_offsets_loaded,
 888                                            &osd->priority_xon_rx[i],
 889                                            &nsd->priority_xon_rx[i]);
 890                         i40e_stat_update32(hw, I40E_GLPRT_PXONTXC(hw->port, i),
 891                                            pf->stat_offsets_loaded,
 892                                            &osd->priority_xon_tx[i],
 893                                            &nsd->priority_xon_tx[i]);
 894                         i40e_stat_update32(hw, I40E_GLPRT_PXOFFTXC(hw->port, i),
 895                                            pf->stat_offsets_loaded,
 896                                            &osd->priority_xoff_tx[i],
 897                                            &nsd->priority_xoff_tx[i]);
 898                         i40e_stat_update32(hw,
 899                                            I40E_GLPRT_RXON2OFFCNT(hw->port, i),
 900                                            pf->stat_offsets_loaded,
 901                                            &osd->priority_xon_2_xoff[i],
 902                                            &nsd->priority_xon_2_xoff[i]);
 903                 }
 904
 905                 i40e_stat_update48(hw, I40E_GLPRT_PRC64H(hw->port),
 906                                    I40E_GLPRT_PRC64L(hw->port),
 907                                    pf->stat_offsets_loaded,
 908                                    &osd->rx_size_64, &nsd->rx_size_64);
 909                 i40e_stat_update48(hw, I40E_GLPRT_PRC127H(hw->port),
 910                                    I40E_GLPRT_PRC127L(hw->port),
 911                                    pf->stat_offsets_loaded,
 912                                    &osd->rx_size_127, &nsd->rx_size_127);
 913                 i40e_stat_update48(hw, I40E_GLPRT_PRC255H(hw->port),
 914                                    I40E_GLPRT_PRC255L(hw->port),
 915                                    pf->stat_offsets_loaded,
 916                                    &osd->rx_size_255, &nsd->rx_size_255);
 917                 i40e_stat_update48(hw, I40E_GLPRT_PRC511H(hw->port),
 918                                    I40E_GLPRT_PRC511L(hw->port),
 919                                    pf->stat_offsets_loaded,
 920                                    &osd->rx_size_511, &nsd->rx_size_511);
 921                 i40e_stat_update48(hw, I40E_GLPRT_PRC1023H(hw->port),
 922                                    I40E_GLPRT_PRC1023L(hw->port),
 923                                    pf->stat_offsets_loaded,
 924                                    &osd->rx_size_1023, &nsd->rx_size_1023);
 925                 i40e_stat_update48(hw, I40E_GLPRT_PRC1522H(hw->port),
 926                                    I40E_GLPRT_PRC1522L(hw->port),
 927                                    pf->stat_offsets_loaded,
 928                                    &osd->rx_size_1522, &nsd->rx_size_1522);
 929                 i40e_stat_update48(hw, I40E_GLPRT_PRC9522H(hw->port),
 930                                    I40E_GLPRT_PRC9522L(hw->port),
 931                                    pf->stat_offsets_loaded,
 932                                    &osd->rx_size_big, &nsd->rx_size_big);
 933
 934                 i40e_stat_update48(hw, I40E_GLPRT_PTC64H(hw->port),
 935                                    I40E_GLPRT_PTC64L(hw->port),
 936                                    pf->stat_offsets_loaded,
 937                                    &osd->tx_size_64, &nsd->tx_size_64);
 938                 i40e_stat_update48(hw, I40E_GLPRT_PTC127H(hw->port),
 939                                    I40E_GLPRT_PTC127L(hw->port),
 940                                    pf->stat_offsets_loaded,
 941                                    &osd->tx_size_127, &nsd->tx_size_127);
 942                 i40e_stat_update48(hw, I40E_GLPRT_PTC255H(hw->port),
 943                                    I40E_GLPRT_PTC255L(hw->port),
 944                                    pf->stat_offsets_loaded,
 945                                    &osd->tx_size_255, &nsd->tx_size_255);
 946                 i40e_stat_update48(hw, I40E_GLPRT_PTC511H(hw->port),
 947                                    I40E_GLPRT_PTC511L(hw->port),
 948                                    pf->stat_offsets_loaded,
 949                                    &osd->tx_size_511, &nsd->tx_size_511);
 950                 i40e_stat_update48(hw, I40E_GLPRT_PTC1023H(hw->port),
 951                                    I40E_GLPRT_PTC1023L(hw->port),
 952                                    pf->stat_offsets_loaded,
 953                                    &osd->tx_size_1023, &nsd->tx_size_1023);
 954                 i40e_stat_update48(hw, I40E_GLPRT_PTC1522H(hw->port),
 955                                    I40E_GLPRT_PTC1522L(hw->port),
 956                                    pf->stat_offsets_loaded,
 957                                    &osd->tx_size_1522, &nsd->tx_size_1522);
 958                 i40e_stat_update48(hw, I40E_GLPRT_PTC9522H(hw->port),
 959                                    I40E_GLPRT_PTC9522L(hw->port),
 960                                    pf->stat_offsets_loaded,
 961                                    &osd->tx_size_big, &nsd->tx_size_big);
 962
 963                 i40e_stat_update32(hw, I40E_GLPRT_RUC(hw->port),
 964                                    pf->stat_offsets_loaded,
 965                                    &osd->rx_undersize, &nsd->rx_undersize);
 966                 i40e_stat_update32(hw, I40E_GLPRT_RFC(hw->port),
 967                                    pf->stat_offsets_loaded,
 968                                    &osd->rx_fragments, &nsd->rx_fragments);
 969                 i40e_stat_update32(hw, I40E_GLPRT_ROC(hw->port),
 970                                    pf->stat_offsets_loaded,
 971                                    &osd->rx_oversize, &nsd->rx_oversize);
 972                 i40e_stat_update32(hw, I40E_GLPRT_RJC(hw->port),
 973                                    pf->stat_offsets_loaded,
 974                                    &osd->rx_jabber, &nsd->rx_jabber);
 975         }
 976
 977         pf->stat_offsets_loaded = true;
 978 }
 979
 980 /**
 981  * i40e_find_filter - Search VSI filter list for specific mac/vlan filter
 982  * @vsi: the VSI to be searched
 983  * @macaddr: the MAC address
 984  * @vlan: the vlan
 985  * @is_vf: make sure its a vf filter, else doesn't matter
 986  * @is_netdev: make sure its a netdev filter, else doesn't matter
 987  *
 988  * Returns ptr to the filter object or NULL
 989  **/
 990 static struct i40e_mac_filter *i40e_find_filter(struct i40e_vsi *vsi,
 991                                                 u8 *macaddr, s16 vlan,
 992                                                 bool is_vf, bool is_netdev)
 993 {
 994         struct i40e_mac_filter *f;
 995
 996         if (!vsi || !macaddr)
 997                 return NULL;
 998
 999         list_for_each_entry(f, &vsi->mac_filter_list, list) {
1000                 if ((ether_addr_equal(macaddr, f->macaddr)) &&
1001                     (vlan == f->vlan)    &&
1002                     (!is_vf || f->is_vf) &&
1003                     (!is_netdev || f->is_netdev))
1004                         return f;
1005         }
1006         return NULL;
1007 }
1008
1009 /**
1010  * i40e_find_mac - Find a mac addr in the macvlan filters list
1011  * @vsi: the VSI to be searched
1012  * @macaddr: the MAC address we are searching for
1013  * @is_vf: make sure its a vf filter, else doesn't matter
1014  * @is_netdev: make sure its a netdev filter, else doesn't matter
1015  *
1016  * Returns the first filter with the provided MAC address or NULL if
1017  * MAC address was not found
1018  **/
1019 struct i40e_mac_filter *i40e_find_mac(struct i40e_vsi *vsi, u8 *macaddr,
1020                                       bool is_vf, bool is_netdev)
1021 {
1022         struct i40e_mac_filter *f;
1023
1024         if (!vsi || !macaddr)
1025                 return NULL;
1026
1027         list_for_each_entry(f, &vsi->mac_filter_list, list) {
1028                 if ((ether_addr_equal(macaddr, f->macaddr)) &&
1029                     (!is_vf || f->is_vf) &&
1030                     (!is_netdev || f->is_netdev))
1031                         return f;
1032         }
1033         return NULL;
1034 }
1035
1036 /**
1037  * i40e_is_vsi_in_vlan - Check if VSI is in vlan mode
1038  * @vsi: the VSI to be searched
1039  *
1040  * Returns true if VSI is in vlan mode or false otherwise
1041  **/
1042 bool i40e_is_vsi_in_vlan(struct i40e_vsi *vsi)
1043 {
1044         struct i40e_mac_filter *f;
1045
1046         /* Only -1 for all the filters denotes not in vlan mode
1047          * so we have to go through all the list in order to make sure
1048          */
1049         list_for_each_entry(f, &vsi->mac_filter_list, list) {
1050                 if (f->vlan >= 0)
1051                         return true;
1052         }
1053
1054         return false;
1055 }
1056
1057 /**
1058  * i40e_put_mac_in_vlan - Make macvlan filters from macaddrs and vlans
1059  * @vsi: the VSI to be searched
1060  * @macaddr: the mac address to be filtered
1061  * @is_vf: true if it is a vf
1062  * @is_netdev: true if it is a netdev
1063  *
1064  * Goes through all the macvlan filters and adds a
1065  * macvlan filter for each unique vlan that already exists
1066  *
1067  * Returns first filter found on success, else NULL
1068  **/
1069 struct i40e_mac_filter *i40e_put_mac_in_vlan(struct i40e_vsi *vsi, u8 *macaddr,
1070                                              bool is_vf, bool is_netdev)
1071 {
1072         struct i40e_mac_filter *f;
1073
1074         list_for_each_entry(f, &vsi->mac_filter_list, list) {
1075                 if (!i40e_find_filter(vsi, macaddr, f->vlan,
1076                                       is_vf, is_netdev)) {
1077                         if (!i40e_add_filter(vsi, macaddr, f->vlan,
1078                                              is_vf, is_netdev))
1079                                 return NULL;
1080                 }
1081         }
1082
1083         return list_first_entry_or_null(&vsi->mac_filter_list,
1084                                         struct i40e_mac_filter, list);
1085 }
1086
1087 /**
1088  * i40e_add_filter - Add a mac/vlan filter to the VSI
1089  * @vsi: the VSI to be searched
1090  * @macaddr: the MAC address
1091  * @vlan: the vlan
1092  * @is_vf: make sure its a vf filter, else doesn't matter
1093  * @is_netdev: make sure its a netdev filter, else doesn't matter
1094  *
1095  * Returns ptr to the filter object or NULL when no memory available.
1096  **/
1097 struct i40e_mac_filter *i40e_add_filter(struct i40e_vsi *vsi,
1098                                         u8 *macaddr, s16 vlan,
1099                                         bool is_vf, bool is_netdev)
1100 {
1101         struct i40e_mac_filter *f;
1102
1103         if (!vsi || !macaddr)
1104                 return NULL;
1105
1106         f = i40e_find_filter(vsi, macaddr, vlan, is_vf, is_netdev);
1107         if (!f) {
1108                 f = kzalloc(sizeof(*f), GFP_ATOMIC);
1109                 if (!f)
1110                         goto add_filter_out;
1111
1112                 memcpy(f->macaddr, macaddr, ETH_ALEN);
1113                 f->vlan = vlan;
1114                 f->changed = true;
1115
1116                 INIT_LIST_HEAD(&f->list);
1117                 list_add(&f->list, &vsi->mac_filter_list);
1118         }
1119
1120         /* increment counter and add a new flag if needed */
1121         if (is_vf) {
1122                 if (!f->is_vf) {
1123                         f->is_vf = true;
1124                         f->counter++;
1125                 }
1126         } else if (is_netdev) {
1127                 if (!f->is_netdev) {
1128                         f->is_netdev = true;
1129                         f->counter++;
1130                 }
1131         } else {
1132                 f->counter++;
1133         }
1134
1135         /* changed tells sync_filters_subtask to
1136          * push the filter down to the firmware
1137          */
1138         if (f->changed) {
1139                 vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
1140                 vsi->back->flags |= I40E_FLAG_FILTER_SYNC;
1141         }
1142
1143 add_filter_out:
1144         return f;
1145 }
1146
1147 /**
1148  * i40e_del_filter - Remove a mac/vlan filter from the VSI
1149  * @vsi: the VSI to be searched
1150  * @macaddr: the MAC address
1151  * @vlan: the vlan
1152  * @is_vf: make sure it's a vf filter, else doesn't matter
1153  * @is_netdev: make sure it's a netdev filter, else doesn't matter
1154  **/
1155 void i40e_del_filter(struct i40e_vsi *vsi,
1156                      u8 *macaddr, s16 vlan,
1157                      bool is_vf, bool is_netdev)
1158 {
1159         struct i40e_mac_filter *f;
1160
1161         if (!vsi || !macaddr)
1162                 return;
1163
1164         f = i40e_find_filter(vsi, macaddr, vlan, is_vf, is_netdev);
1165         if (!f || f->counter == 0)
1166                 return;
1167
1168         if (is_vf) {
1169                 if (f->is_vf) {
1170                         f->is_vf = false;
1171                         f->counter--;
1172                 }
1173         } else if (is_netdev) {
1174                 if (f->is_netdev) {
1175                         f->is_netdev = false;
1176                         f->counter--;
1177                 }
1178         } else {
1179                 /* make sure we don't remove a filter in use by vf or netdev */
1180                 int min_f = 0;
1181                 min_f += (f->is_vf ? 1 : 0);
1182                 min_f += (f->is_netdev ? 1 : 0);
1183
1184                 if (f->counter > min_f)
1185                         f->counter--;
1186         }
1187
1188         /* counter == 0 tells sync_filters_subtask to
1189          * remove the filter from the firmware's list
1190          */
1191         if (f->counter == 0) {
1192                 f->changed = true;
1193                 vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
1194                 vsi->back->flags |= I40E_FLAG_FILTER_SYNC;
1195         }
1196 }
1197
1198 /**
1199  * i40e_set_mac - NDO callback to set mac address
1200  * @netdev: network interface device structure
1201  * @p: pointer to an address structure
1202  *
1203  * Returns 0 on success, negative on failure
1204  **/
1205 static int i40e_set_mac(struct net_device *netdev, void *p)
1206 {
1207         struct i40e_netdev_priv *np = netdev_priv(netdev);
1208         struct i40e_vsi *vsi = np->vsi;
1209         struct sockaddr *addr = p;
1210         struct i40e_mac_filter *f;
1211
1212         if (!is_valid_ether_addr(addr->sa_data))
1213                 return -EADDRNOTAVAIL;
1214
1215         netdev_info(netdev, "set mac address=%pM\n", addr->sa_data);
1216
1217         if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
1218                 return 0;
1219
1220         if (test_bit(__I40E_DOWN, &vsi->back->state) ||
1221             test_bit(__I40E_RESET_RECOVERY_PENDING, &vsi->back->state))
1222                 return -EADDRNOTAVAIL;
1223
1224         if (vsi->type == I40E_VSI_MAIN) {
1225                 i40e_status ret;
1226                 ret = i40e_aq_mac_address_write(&vsi->back->hw,
1227                                                 I40E_AQC_WRITE_TYPE_LAA_ONLY,
1228                                                 addr->sa_data, NULL);
1229                 if (ret) {
1230                         netdev_info(netdev,
1231                                     "Addr change for Main VSI failed: %d\n",
1232                                     ret);
1233                         return -EADDRNOTAVAIL;
1234                 }
1235
1236                 memcpy(vsi->back->hw.mac.addr, addr->sa_data, netdev->addr_len);
1237         }
1238
1239         /* In order to be sure to not drop any packets, add the new address
1240          * then delete the old one.
1241          */
1242         f = i40e_add_filter(vsi, addr->sa_data, I40E_VLAN_ANY, false, false);
1243         if (!f)
1244                 return -ENOMEM;
1245
1246         i40e_sync_vsi_filters(vsi);
1247         i40e_del_filter(vsi, netdev->dev_addr, I40E_VLAN_ANY, false, false);
1248         i40e_sync_vsi_filters(vsi);
1249
1250         memcpy(netdev->dev_addr, addr->sa_data, netdev->addr_len);
1251
1252         return 0;
1253 }
1254
1255 /**
1256  * i40e_vsi_setup_queue_map - Setup a VSI queue map based on enabled_tc
1257  * @vsi: the VSI being setup
1258  * @ctxt: VSI context structure
1259  * @enabled_tc: Enabled TCs bitmap
1260  * @is_add: True if called before Add VSI
1261  *
1262  * Setup VSI queue mapping for enabled traffic classes.
1263  **/
1264 static void i40e_vsi_setup_queue_map(struct i40e_vsi *vsi,
1265                                      struct i40e_vsi_context *ctxt,
1266                                      u8 enabled_tc,
1267                                      bool is_add)
1268 {
1269         struct i40e_pf *pf = vsi->back;
1270         u16 sections = 0;
1271         u8 netdev_tc = 0;
1272         u16 numtc = 0;
1273         u16 qcount;
1274         u8 offset;
1275         u16 qmap;
1276         int i;
1277         u16 num_tc_qps = 0;
1278
1279         sections = I40E_AQ_VSI_PROP_QUEUE_MAP_VALID;
1280         offset = 0;
1281
1282         if (enabled_tc && (vsi->back->flags & I40E_FLAG_DCB_ENABLED)) {
1283                 /* Find numtc from enabled TC bitmap */
1284                 for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
1285                         if (enabled_tc & (1 << i)) /* TC is enabled */
1286                                 numtc++;
1287                 }
1288                 if (!numtc) {
1289                         dev_warn(&pf->pdev->dev, "DCB is enabled but no TC enabled, forcing TC0\n");
1290                         numtc = 1;
1291                 }
1292         } else {
1293                 /* At least TC0 is enabled in case of non-DCB case */
1294                 numtc = 1;
1295         }
1296
1297         vsi->tc_config.numtc = numtc;
1298         vsi->tc_config.enabled_tc = enabled_tc ? enabled_tc : 1;
1299         /* Number of queues per enabled TC */
1300         num_tc_qps = rounddown_pow_of_two(vsi->alloc_queue_pairs/numtc);
1301         num_tc_qps = min_t(int, num_tc_qps, I40E_MAX_QUEUES_PER_TC);
1302
1303         /* Setup queue offset/count for all TCs for given VSI */
1304         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
1305                 /* See if the given TC is enabled for the given VSI */
1306                 if (vsi->tc_config.enabled_tc & (1 << i)) { /* TC is enabled */
1307                         int pow, num_qps;
1308
1309                         switch (vsi->type) {
1310                         case I40E_VSI_MAIN:
1311                                 qcount = min_t(int, pf->rss_size, num_tc_qps);
1312                                 break;
1313                         case I40E_VSI_FDIR:
1314                         case I40E_VSI_SRIOV:
1315                         case I40E_VSI_VMDQ2:
1316                         default:
1317                                 qcount = num_tc_qps;
1318                                 WARN_ON(i != 0);
1319                                 break;
1320                         }
1321                         vsi->tc_config.tc_info[i].qoffset = offset;
1322                         vsi->tc_config.tc_info[i].qcount = qcount;
1323
1324                         /* find the power-of-2 of the number of queue pairs */
1325                         num_qps = qcount;
1326                         pow = 0;
1327                         while (num_qps && ((1 << pow) < qcount)) {
1328                                 pow++;
1329                                 num_qps >>= 1;
1330                         }
1331
1332                         vsi->tc_config.tc_info[i].netdev_tc = netdev_tc++;
1333                         qmap =
1334                             (offset << I40E_AQ_VSI_TC_QUE_OFFSET_SHIFT) |
1335                             (pow << I40E_AQ_VSI_TC_QUE_NUMBER_SHIFT);
1336
1337                         offset += qcount;
1338                 } else {
1339                         /* TC is not enabled so set the offset to
1340                          * default queue and allocate one queue
1341                          * for the given TC.
1342                          */
1343                         vsi->tc_config.tc_info[i].qoffset = 0;
1344                         vsi->tc_config.tc_info[i].qcount = 1;
1345                         vsi->tc_config.tc_info[i].netdev_tc = 0;
1346
1347                         qmap = 0;
1348                 }
1349                 ctxt->info.tc_mapping[i] = cpu_to_le16(qmap);
1350         }
1351
1352         /* Set actual Tx/Rx queue pairs */
1353         vsi->num_queue_pairs = offset;
1354
1355         /* Scheduler section valid can only be set for ADD VSI */
1356         if (is_add) {
1357                 sections |= I40E_AQ_VSI_PROP_SCHED_VALID;
1358
1359                 ctxt->info.up_enable_bits = enabled_tc;
1360         }
1361         if (vsi->type == I40E_VSI_SRIOV) {
1362                 ctxt->info.mapping_flags |=
1363                                      cpu_to_le16(I40E_AQ_VSI_QUE_MAP_NONCONTIG);
1364                 for (i = 0; i < vsi->num_queue_pairs; i++)
1365                         ctxt->info.queue_mapping[i] =
1366                                                cpu_to_le16(vsi->base_queue + i);
1367         } else {
1368                 ctxt->info.mapping_flags |=
1369                                         cpu_to_le16(I40E_AQ_VSI_QUE_MAP_CONTIG);
1370                 ctxt->info.queue_mapping[0] = cpu_to_le16(vsi->base_queue);
1371         }
1372         ctxt->info.valid_sections |= cpu_to_le16(sections);
1373 }
1374
1375 /**
1376  * i40e_set_rx_mode - NDO callback to set the netdev filters
1377  * @netdev: network interface device structure
1378  **/
1379 static void i40e_set_rx_mode(struct net_device *netdev)
1380 {
1381         struct i40e_netdev_priv *np = netdev_priv(netdev);
1382         struct i40e_mac_filter *f, *ftmp;
1383         struct i40e_vsi *vsi = np->vsi;
1384         struct netdev_hw_addr *uca;
1385         struct netdev_hw_addr *mca;
1386         struct netdev_hw_addr *ha;
1387
1388         /* add addr if not already in the filter list */
1389         netdev_for_each_uc_addr(uca, netdev) {
1390                 if (!i40e_find_mac(vsi, uca->addr, false, true)) {
1391                         if (i40e_is_vsi_in_vlan(vsi))
1392                                 i40e_put_mac_in_vlan(vsi, uca->addr,
1393                                                      false, true);
1394                         else
1395                                 i40e_add_filter(vsi, uca->addr, I40E_VLAN_ANY,
1396                                                 false, true);
1397                 }
1398         }
1399
1400         netdev_for_each_mc_addr(mca, netdev) {
1401                 if (!i40e_find_mac(vsi, mca->addr, false, true)) {
1402                         if (i40e_is_vsi_in_vlan(vsi))
1403                                 i40e_put_mac_in_vlan(vsi, mca->addr,
1404                                                      false, true);
1405                         else
1406                                 i40e_add_filter(vsi, mca->addr, I40E_VLAN_ANY,
1407                                                 false, true);
1408                 }
1409         }
1410
1411         /* remove filter if not in netdev list */
1412         list_for_each_entry_safe(f, ftmp, &vsi->mac_filter_list, list) {
1413                 bool found = false;
1414
1415                 if (!f->is_netdev)
1416                         continue;
1417
1418                 if (is_multicast_ether_addr(f->macaddr)) {
1419                         netdev_for_each_mc_addr(mca, netdev) {
1420                                 if (ether_addr_equal(mca->addr, f->macaddr)) {
1421                                         found = true;
1422                                         break;
1423                                 }
1424                         }
1425                 } else {
1426                         netdev_for_each_uc_addr(uca, netdev) {
1427                                 if (ether_addr_equal(uca->addr, f->macaddr)) {
1428                                         found = true;
1429                                         break;
1430                                 }
1431                         }
1432
1433                         for_each_dev_addr(netdev, ha) {
1434                                 if (ether_addr_equal(ha->addr, f->macaddr)) {
1435                                         found = true;
1436                                         break;
1437                                 }
1438                         }
1439                 }
1440                 if (!found)
1441                         i40e_del_filter(
1442                            vsi, f->macaddr, I40E_VLAN_ANY, false, true);
1443         }
1444
1445         /* check for other flag changes */
1446         if (vsi->current_netdev_flags != vsi->netdev->flags) {
1447                 vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
1448                 vsi->back->flags |= I40E_FLAG_FILTER_SYNC;
1449         }
1450 }
1451
1452 /**
1453  * i40e_sync_vsi_filters - Update the VSI filter list to the HW
1454  * @vsi: ptr to the VSI
1455  *
1456  * Push any outstanding VSI filter changes through the AdminQ.
1457  *
1458  * Returns 0 or error value
1459  **/
1460 int i40e_sync_vsi_filters(struct i40e_vsi *vsi)
1461 {
1462         struct i40e_mac_filter *f, *ftmp;
1463         bool promisc_forced_on = false;
1464         bool add_happened = false;
1465         int filter_list_len = 0;
1466         u32 changed_flags = 0;
1467         i40e_status aq_ret = 0;
1468         struct i40e_pf *pf;
1469         int num_add = 0;
1470         int num_del = 0;
1471         u16 cmd_flags;
1472
1473         /* empty array typed pointers, kcalloc later */
1474         struct i40e_aqc_add_macvlan_element_data *add_list;
1475         struct i40e_aqc_remove_macvlan_element_data *del_list;
1476
1477         while (test_and_set_bit(__I40E_CONFIG_BUSY, &vsi->state))
1478                 usleep_range(1000, 2000);
1479         pf = vsi->back;
1480
1481         if (vsi->netdev) {
1482                 changed_flags = vsi->current_netdev_flags ^ vsi->netdev->flags;
1483                 vsi->current_netdev_flags = vsi->netdev->flags;
1484         }
1485
1486         if (vsi->flags & I40E_VSI_FLAG_FILTER_CHANGED) {
1487                 vsi->flags &= ~I40E_VSI_FLAG_FILTER_CHANGED;
1488
1489                 filter_list_len = pf->hw.aq.asq_buf_size /
1490                             sizeof(struct i40e_aqc_remove_macvlan_element_data);
1491                 del_list = kcalloc(filter_list_len,
1492                             sizeof(struct i40e_aqc_remove_macvlan_element_data),
1493                             GFP_KERNEL);
1494                 if (!del_list)
1495                         return -ENOMEM;
1496
1497                 list_for_each_entry_safe(f, ftmp, &vsi->mac_filter_list, list) {
1498                         if (!f->changed)
1499                                 continue;
1500
1501                         if (f->counter != 0)
1502                                 continue;
1503                         f->changed = false;
1504                         cmd_flags = 0;
1505
1506                         /* add to delete list */
1507                         memcpy(del_list[num_del].mac_addr,
1508                                f->macaddr, ETH_ALEN);
1509                         del_list[num_del].vlan_tag =
1510                                 cpu_to_le16((u16)(f->vlan ==
1511                                             I40E_VLAN_ANY ? 0 : f->vlan));
1512
1513                         cmd_flags |= I40E_AQC_MACVLAN_DEL_PERFECT_MATCH;
1514                         del_list[num_del].flags = cmd_flags;
1515                         num_del++;
1516
1517                         /* unlink from filter list */
1518                         list_del(&f->list);
1519                         kfree(f);
1520
1521                         /* flush a full buffer */
1522                         if (num_del == filter_list_len) {
1523                                 aq_ret = i40e_aq_remove_macvlan(&pf->hw,
1524                                             vsi->seid, del_list, num_del,
1525                                             NULL);
1526                                 num_del = 0;
1527                                 memset(del_list, 0, sizeof(*del_list));
1528
1529                                 if (aq_ret)
1530                                         dev_info(&pf->pdev->dev,
1531                                                  "ignoring delete macvlan error, err %d, aq_err %d while flushing a full buffer\n",
1532                                                  aq_ret,
1533                                                  pf->hw.aq.asq_last_status);
1534                         }
1535                 }
1536                 if (num_del) {
1537                         aq_ret = i40e_aq_remove_macvlan(&pf->hw, vsi->seid,
1538                                                      del_list, num_del, NULL);
1539                         num_del = 0;
1540
1541                         if (aq_ret)
1542                                 dev_info(&pf->pdev->dev,
1543                                          "ignoring delete macvlan error, err %d, aq_err %d\n",
1544                                          aq_ret, pf->hw.aq.asq_last_status);
1545                 }
1546
1547                 kfree(del_list);
1548                 del_list = NULL;
1549
1550                 /* do all the adds now */
1551                 filter_list_len = pf->hw.aq.asq_buf_size /
1552                                sizeof(struct i40e_aqc_add_macvlan_element_data),
1553                 add_list = kcalloc(filter_list_len,
1554                                sizeof(struct i40e_aqc_add_macvlan_element_data),
1555                                GFP_KERNEL);
1556                 if (!add_list)
1557                         return -ENOMEM;
1558
1559                 list_for_each_entry_safe(f, ftmp, &vsi->mac_filter_list, list) {
1560                         if (!f->changed)
1561                                 continue;
1562
1563                         if (f->counter == 0)
1564                                 continue;
1565                         f->changed = false;
1566                         add_happened = true;
1567                         cmd_flags = 0;
1568
1569                         /* add to add array */
1570                         memcpy(add_list[num_add].mac_addr,
1571                                f->macaddr, ETH_ALEN);
1572                         add_list[num_add].vlan_tag =
1573                                 cpu_to_le16(
1574                                  (u16)(f->vlan == I40E_VLAN_ANY ? 0 : f->vlan));
1575                         add_list[num_add].queue_number = 0;
1576
1577                         cmd_flags |= I40E_AQC_MACVLAN_ADD_PERFECT_MATCH;
1578                         add_list[num_add].flags = cpu_to_le16(cmd_flags);
1579                         num_add++;
1580
1581                         /* flush a full buffer */
1582                         if (num_add == filter_list_len) {
1583                                 aq_ret = i40e_aq_add_macvlan(&pf->hw, vsi->seid,
1584                                                              add_list, num_add,
1585                                                              NULL);
1586                                 num_add = 0;
1587
1588                                 if (aq_ret)
1589                                         break;
1590                                 memset(add_list, 0, sizeof(*add_list));
1591                         }
1592                 }
1593                 if (num_add) {
1594                         aq_ret = i40e_aq_add_macvlan(&pf->hw, vsi->seid,
1595                                                      add_list, num_add, NULL);
1596                         num_add = 0;
1597                 }
1598                 kfree(add_list);
1599                 add_list = NULL;
1600
1601                 if (add_happened && (!aq_ret)) {
1602                         /* do nothing */;
1603                 } else if (add_happened && (aq_ret)) {
1604                         dev_info(&pf->pdev->dev,
1605                                  "add filter failed, err %d, aq_err %d\n",
1606                                  aq_ret, pf->hw.aq.asq_last_status);
1607                         if ((pf->hw.aq.asq_last_status == I40E_AQ_RC_ENOSPC) &&
1608                             !test_bit(__I40E_FILTER_OVERFLOW_PROMISC,
1609                                       &vsi->state)) {
1610                                 promisc_forced_on = true;
1611                                 set_bit(__I40E_FILTER_OVERFLOW_PROMISC,
1612                                         &vsi->state);
1613                                 dev_info(&pf->pdev->dev, "promiscuous mode forced on\n");
1614                         }
1615                 }
1616         }
1617
1618         /* check for changes in promiscuous modes */
1619         if (changed_flags & IFF_ALLMULTI) {
1620                 bool cur_multipromisc;
1621                 cur_multipromisc = !!(vsi->current_netdev_flags & IFF_ALLMULTI);
1622                 aq_ret = i40e_aq_set_vsi_multicast_promiscuous(&vsi->back->hw,
1623                                                                vsi->seid,
1624                                                                cur_multipromisc,
1625                                                                NULL);
1626                 if (aq_ret)
1627                         dev_info(&pf->pdev->dev,
1628                                  "set multi promisc failed, err %d, aq_err %d\n",
1629                                  aq_ret, pf->hw.aq.asq_last_status);
1630         }
1631         if ((changed_flags & IFF_PROMISC) || promisc_forced_on) {
1632                 bool cur_promisc;
1633                 cur_promisc = (!!(vsi->current_netdev_flags & IFF_PROMISC) ||
1634                                test_bit(__I40E_FILTER_OVERFLOW_PROMISC,
1635                                         &vsi->state));
1636                 aq_ret = i40e_aq_set_vsi_unicast_promiscuous(&vsi->back->hw,
1637                                                              vsi->seid,
1638                                                              cur_promisc, NULL);
1639                 if (aq_ret)
1640                         dev_info(&pf->pdev->dev,
1641                                  "set uni promisc failed, err %d, aq_err %d\n",
1642                                  aq_ret, pf->hw.aq.asq_last_status);
1643                 aq_ret = i40e_aq_set_vsi_broadcast(&vsi->back->hw,
1644                                                    vsi->seid,
1645                                                    cur_promisc, NULL);
1646                 if (aq_ret)
1647                         dev_info(&pf->pdev->dev,
1648                                  "set brdcast promisc failed, err %d, aq_err %d\n",
1649                                  aq_ret, pf->hw.aq.asq_last_status);
1650         }
1651
1652         clear_bit(__I40E_CONFIG_BUSY, &vsi->state);
1653         return 0;
1654 }
1655
1656 /**
1657  * i40e_sync_filters_subtask - Sync the VSI filter list with HW
1658  * @pf: board private structure
1659  **/
1660 static void i40e_sync_filters_subtask(struct i40e_pf *pf)
1661 {
1662         int v;
1663
1664         if (!pf || !(pf->flags & I40E_FLAG_FILTER_SYNC))
1665                 return;
1666         pf->flags &= ~I40E_FLAG_FILTER_SYNC;
1667
1668         for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
1669                 if (pf->vsi[v] &&
1670                     (pf->vsi[v]->flags & I40E_VSI_FLAG_FILTER_CHANGED))
1671                         i40e_sync_vsi_filters(pf->vsi[v]);
1672         }
1673 }
1674
1675 /**
1676  * i40e_change_mtu - NDO callback to change the Maximum Transfer Unit
1677  * @netdev: network interface device structure
1678  * @new_mtu: new value for maximum frame size
1679  *
1680  * Returns 0 on success, negative on failure
1681  **/
1682 static int i40e_change_mtu(struct net_device *netdev, int new_mtu)
1683 {
1684         struct i40e_netdev_priv *np = netdev_priv(netdev);
1685         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
1686         struct i40e_vsi *vsi = np->vsi;
1687
1688         /* MTU < 68 is an error and causes problems on some kernels */
1689         if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
1690                 return -EINVAL;
1691
1692         netdev_info(netdev, "changing MTU from %d to %d\n",
1693                     netdev->mtu, new_mtu);
1694         netdev->mtu = new_mtu;
1695         if (netif_running(netdev))
1696                 i40e_vsi_reinit_locked(vsi);
1697
1698         return 0;
1699 }
1700
1701 /**
1702  * i40e_ioctl - Access the hwtstamp interface
1703  * @netdev: network interface device structure
1704  * @ifr: interface request data
1705  * @cmd: ioctl command
1706  **/
1707 int i40e_ioctl(struct net_device *netdev, struct ifreq *ifr, int cmd)
1708 {
1709         struct i40e_netdev_priv *np = netdev_priv(netdev);
1710         struct i40e_pf *pf = np->vsi->back;
1711
1712         switch (cmd) {
1713         case SIOCGHWTSTAMP:
1714                 return i40e_ptp_get_ts_config(pf, ifr);
1715         case SIOCSHWTSTAMP:
1716                 return i40e_ptp_set_ts_config(pf, ifr);
1717         default:
1718                 return -EOPNOTSUPP;
1719         }
1720 }
1721
1722 /**
1723  * i40e_vlan_stripping_enable - Turn on vlan stripping for the VSI
1724  * @vsi: the vsi being adjusted
1725  **/
1726 void i40e_vlan_stripping_enable(struct i40e_vsi *vsi)
1727 {
1728         struct i40e_vsi_context ctxt;
1729         i40e_status ret;
1730
1731         if ((vsi->info.valid_sections &
1732              cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID)) &&
1733             ((vsi->info.port_vlan_flags & I40E_AQ_VSI_PVLAN_MODE_MASK) == 0))
1734                 return;  /* already enabled */
1735
1736         vsi->info.valid_sections = cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID);
1737         vsi->info.port_vlan_flags = I40E_AQ_VSI_PVLAN_MODE_ALL |
1738                                     I40E_AQ_VSI_PVLAN_EMOD_STR_BOTH;
1739
1740         ctxt.seid = vsi->seid;
1741         memcpy(&ctxt.info, &vsi->info, sizeof(vsi->info));
1742         ret = i40e_aq_update_vsi_params(&vsi->back->hw, &ctxt, NULL);
1743         if (ret) {
1744                 dev_info(&vsi->back->pdev->dev,
1745                          "%s: update vsi failed, aq_err=%d\n",
1746                          __func__, vsi->back->hw.aq.asq_last_status);
1747         }
1748 }
1749
1750 /**
1751  * i40e_vlan_stripping_disable - Turn off vlan stripping for the VSI
1752  * @vsi: the vsi being adjusted
1753  **/
1754 void i40e_vlan_stripping_disable(struct i40e_vsi *vsi)
1755 {
1756         struct i40e_vsi_context ctxt;
1757         i40e_status ret;
1758
1759         if ((vsi->info.valid_sections &
1760              cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID)) &&
1761             ((vsi->info.port_vlan_flags & I40E_AQ_VSI_PVLAN_EMOD_MASK) ==
1762              I40E_AQ_VSI_PVLAN_EMOD_MASK))
1763                 return;  /* already disabled */
1764
1765         vsi->info.valid_sections = cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID);
1766         vsi->info.port_vlan_flags = I40E_AQ_VSI_PVLAN_MODE_ALL |
1767                                     I40E_AQ_VSI_PVLAN_EMOD_NOTHING;
1768
1769         ctxt.seid = vsi->seid;
1770         memcpy(&ctxt.info, &vsi->info, sizeof(vsi->info));
1771         ret = i40e_aq_update_vsi_params(&vsi->back->hw, &ctxt, NULL);
1772         if (ret) {
1773                 dev_info(&vsi->back->pdev->dev,
1774                          "%s: update vsi failed, aq_err=%d\n",
1775                          __func__, vsi->back->hw.aq.asq_last_status);
1776         }
1777 }
1778
1779 /**
1780  * i40e_vlan_rx_register - Setup or shutdown vlan offload
1781  * @netdev: network interface to be adjusted
1782  * @features: netdev features to test if VLAN offload is enabled or not
1783  **/
1784 static void i40e_vlan_rx_register(struct net_device *netdev, u32 features)
1785 {
1786         struct i40e_netdev_priv *np = netdev_priv(netdev);
1787         struct i40e_vsi *vsi = np->vsi;
1788
1789         if (features & NETIF_F_HW_VLAN_CTAG_RX)
1790                 i40e_vlan_stripping_enable(vsi);
1791         else
1792                 i40e_vlan_stripping_disable(vsi);
1793 }
1794
1795 /**
1796  * i40e_vsi_add_vlan - Add vsi membership for given vlan
1797  * @vsi: the vsi being configured
1798  * @vid: vlan id to be added (0 = untagged only , -1 = any)
1799  **/
1800 int i40e_vsi_add_vlan(struct i40e_vsi *vsi, s16 vid)
1801 {
1802         struct i40e_mac_filter *f, *add_f;
1803         bool is_netdev, is_vf;
1804
1805         is_vf = (vsi->type == I40E_VSI_SRIOV);
1806         is_netdev = !!(vsi->netdev);
1807
1808         if (is_netdev) {
1809                 add_f = i40e_add_filter(vsi, vsi->netdev->dev_addr, vid,
1810                                         is_vf, is_netdev);
1811                 if (!add_f) {
1812                         dev_info(&vsi->back->pdev->dev,
1813                                  "Could not add vlan filter %d for %pM\n",
1814                                  vid, vsi->netdev->dev_addr);
1815                         return -ENOMEM;
1816                 }
1817         }
1818
1819         list_for_each_entry(f, &vsi->mac_filter_list, list) {
1820                 add_f = i40e_add_filter(vsi, f->macaddr, vid, is_vf, is_netdev);
1821                 if (!add_f) {
1822                         dev_info(&vsi->back->pdev->dev,
1823                                  "Could not add vlan filter %d for %pM\n",
1824                                  vid, f->macaddr);
1825                         return -ENOMEM;
1826                 }
1827         }
1828
1829         /* Now if we add a vlan tag, make sure to check if it is the first
1830          * tag (i.e. a "tag" -1 does exist) and if so replace the -1 "tag"
1831          * with 0, so we now accept untagged and specified tagged traffic
1832          * (and not any taged and untagged)
1833          */
1834         if (vid > 0) {
1835                 if (is_netdev && i40e_find_filter(vsi, vsi->netdev->dev_addr,
1836                                                   I40E_VLAN_ANY,
1837                                                   is_vf, is_netdev)) {
1838                         i40e_del_filter(vsi, vsi->netdev->dev_addr,
1839                                         I40E_VLAN_ANY, is_vf, is_netdev);
1840                         add_f = i40e_add_filter(vsi, vsi->netdev->dev_addr, 0,
1841                                                 is_vf, is_netdev);
1842                         if (!add_f) {
1843                                 dev_info(&vsi->back->pdev->dev,
1844                                          "Could not add filter 0 for %pM\n",
1845                                          vsi->netdev->dev_addr);
1846                                 return -ENOMEM;
1847                         }
1848                 }
1849         }
1850
1851         /* Do not assume that I40E_VLAN_ANY should be reset to VLAN 0 */
1852         if (vid > 0 && !vsi->info.pvid) {
1853                 list_for_each_entry(f, &vsi->mac_filter_list, list) {
1854                         if (i40e_find_filter(vsi, f->macaddr, I40E_VLAN_ANY,
1855                                              is_vf, is_netdev)) {
1856                                 i40e_del_filter(vsi, f->macaddr, I40E_VLAN_ANY,
1857                                                 is_vf, is_netdev);
1858                                 add_f = i40e_add_filter(vsi, f->macaddr,
1859                                                         0, is_vf, is_netdev);
1860                                 if (!add_f) {
1861                                         dev_info(&vsi->back->pdev->dev,
1862                                                  "Could not add filter 0 for %pM\n",
1863                                                  f->macaddr);
1864                                         return -ENOMEM;
1865                                 }
1866                         }
1867                 }
1868         }
1869
1870         if (test_bit(__I40E_DOWN, &vsi->back->state) ||
1871             test_bit(__I40E_RESET_RECOVERY_PENDING, &vsi->back->state))
1872                 return 0;
1873
1874         return i40e_sync_vsi_filters(vsi);
1875 }
1876
1877 /**
1878  * i40e_vsi_kill_vlan - Remove vsi membership for given vlan
1879  * @vsi: the vsi being configured
1880  * @vid: vlan id to be removed (0 = untagged only , -1 = any)
1881  *
1882  * Return: 0 on success or negative otherwise
1883  **/
1884 int i40e_vsi_kill_vlan(struct i40e_vsi *vsi, s16 vid)
1885 {
1886         struct net_device *netdev = vsi->netdev;
1887         struct i40e_mac_filter *f, *add_f;
1888         bool is_vf, is_netdev;
1889         int filter_count = 0;
1890
1891         is_vf = (vsi->type == I40E_VSI_SRIOV);
1892         is_netdev = !!(netdev);
1893
1894         if (is_netdev)
1895                 i40e_del_filter(vsi, netdev->dev_addr, vid, is_vf, is_netdev);
1896
1897         list_for_each_entry(f, &vsi->mac_filter_list, list)
1898                 i40e_del_filter(vsi, f->macaddr, vid, is_vf, is_netdev);
1899
1900         /* go through all the filters for this VSI and if there is only
1901          * vid == 0 it means there are no other filters, so vid 0 must
1902          * be replaced with -1. This signifies that we should from now
1903          * on accept any traffic (with any tag present, or untagged)
1904          */
1905         list_for_each_entry(f, &vsi->mac_filter_list, list) {
1906                 if (is_netdev) {
1907                         if (f->vlan &&
1908                             ether_addr_equal(netdev->dev_addr, f->macaddr))
1909                                 filter_count++;
1910                 }
1911
1912                 if (f->vlan)
1913                         filter_count++;
1914         }
1915
1916         if (!filter_count && is_netdev) {
1917                 i40e_del_filter(vsi, netdev->dev_addr, 0, is_vf, is_netdev);
1918                 f = i40e_add_filter(vsi, netdev->dev_addr, I40E_VLAN_ANY,
1919                                     is_vf, is_netdev);
1920                 if (!f) {
1921                         dev_info(&vsi->back->pdev->dev,
1922                                  "Could not add filter %d for %pM\n",
1923                                  I40E_VLAN_ANY, netdev->dev_addr);
1924                         return -ENOMEM;
1925                 }
1926         }
1927
1928         if (!filter_count) {
1929                 list_for_each_entry(f, &vsi->mac_filter_list, list) {
1930                         i40e_del_filter(vsi, f->macaddr, 0, is_vf, is_netdev);
1931                         add_f = i40e_add_filter(vsi, f->macaddr, I40E_VLAN_ANY,
1932                                             is_vf, is_netdev);
1933                         if (!add_f) {
1934                                 dev_info(&vsi->back->pdev->dev,
1935                                          "Could not add filter %d for %pM\n",
1936                                          I40E_VLAN_ANY, f->macaddr);
1937                                 return -ENOMEM;
1938                         }
1939                 }
1940         }
1941
1942         if (test_bit(__I40E_DOWN, &vsi->back->state) ||
1943             test_bit(__I40E_RESET_RECOVERY_PENDING, &vsi->back->state))
1944                 return 0;
1945
1946         return i40e_sync_vsi_filters(vsi);
1947 }
1948
1949 /**
1950  * i40e_vlan_rx_add_vid - Add a vlan id filter to HW offload
1951  * @netdev: network interface to be adjusted
1952  * @vid: vlan id to be added
1953  *
1954  * net_device_ops implementation for adding vlan ids
1955  **/
1956 static int i40e_vlan_rx_add_vid(struct net_device *netdev,
1957                                 __always_unused __be16 proto, u16 vid)
1958 {
1959         struct i40e_netdev_priv *np = netdev_priv(netdev);
1960         struct i40e_vsi *vsi = np->vsi;
1961         int ret = 0;
1962
1963         if (vid > 4095)
1964                 return -EINVAL;
1965
1966         netdev_info(netdev, "adding %pM vid=%d\n", netdev->dev_addr, vid);
1967
1968         /* If the network stack called us with vid = 0 then
1969          * it is asking to receive priority tagged packets with
1970          * vlan id 0.  Our HW receives them by default when configured
1971          * to receive untagged packets so there is no need to add an
1972          * extra filter for vlan 0 tagged packets.
1973          */
1974         if (vid)
1975                 ret = i40e_vsi_add_vlan(vsi, vid);
1976
1977         if (!ret && (vid < VLAN_N_VID))
1978                 set_bit(vid, vsi->active_vlans);
1979
1980         return ret;
1981 }
1982
1983 /**
1984  * i40e_vlan_rx_kill_vid - Remove a vlan id filter from HW offload
1985  * @netdev: network interface to be adjusted
1986  * @vid: vlan id to be removed
1987  *
1988  * net_device_ops implementation for removing vlan ids
1989  **/
1990 static int i40e_vlan_rx_kill_vid(struct net_device *netdev,
1991                                  __always_unused __be16 proto, u16 vid)
1992 {
1993         struct i40e_netdev_priv *np = netdev_priv(netdev);
1994         struct i40e_vsi *vsi = np->vsi;
1995
1996         netdev_info(netdev, "removing %pM vid=%d\n", netdev->dev_addr, vid);
1997
1998         /* return code is ignored as there is nothing a user
1999          * can do about failure to remove and a log message was
2000          * already printed from the other function
2001          */
2002         i40e_vsi_kill_vlan(vsi, vid);
2003
2004         clear_bit(vid, vsi->active_vlans);
2005
2006         return 0;
2007 }
2008
2009 /**
2010  * i40e_restore_vlan - Reinstate vlans when vsi/netdev comes back up
2011  * @vsi: the vsi being brought back up
2012  **/
2013 static void i40e_restore_vlan(struct i40e_vsi *vsi)
2014 {
2015         u16 vid;
2016
2017         if (!vsi->netdev)
2018                 return;
2019
2020         i40e_vlan_rx_register(vsi->netdev, vsi->netdev->features);
2021
2022         for_each_set_bit(vid, vsi->active_vlans, VLAN_N_VID)
2023                 i40e_vlan_rx_add_vid(vsi->netdev, htons(ETH_P_8021Q),
2024                                      vid);
2025 }
2026
2027 /**
2028  * i40e_vsi_add_pvid - Add pvid for the VSI
2029  * @vsi: the vsi being adjusted
2030  * @vid: the vlan id to set as a PVID
2031  **/
2032 int i40e_vsi_add_pvid(struct i40e_vsi *vsi, u16 vid)
2033 {
2034         struct i40e_vsi_context ctxt;
2035         i40e_status aq_ret;
2036
2037         vsi->info.valid_sections = cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID);
2038         vsi->info.pvid = cpu_to_le16(vid);
2039         vsi->info.port_vlan_flags = I40E_AQ_VSI_PVLAN_MODE_TAGGED |
2040                                     I40E_AQ_VSI_PVLAN_INSERT_PVID |
2041                                     I40E_AQ_VSI_PVLAN_EMOD_STR;
2042
2043         ctxt.seid = vsi->seid;
2044         memcpy(&ctxt.info, &vsi->info, sizeof(vsi->info));
2045         aq_ret = i40e_aq_update_vsi_params(&vsi->back->hw, &ctxt, NULL);
2046         if (aq_ret) {
2047                 dev_info(&vsi->back->pdev->dev,
2048                          "%s: update vsi failed, aq_err=%d\n",
2049                          __func__, vsi->back->hw.aq.asq_last_status);
2050                 return -ENOENT;
2051         }
2052
2053         return 0;
2054 }
2055
2056 /**
2057  * i40e_vsi_remove_pvid - Remove the pvid from the VSI
2058  * @vsi: the vsi being adjusted
2059  *
2060  * Just use the vlan_rx_register() service to put it back to normal
2061  **/
2062 void i40e_vsi_remove_pvid(struct i40e_vsi *vsi)
2063 {
2064         i40e_vlan_stripping_disable(vsi);
2065
2066         vsi->info.pvid = 0;
2067 }
2068
2069 /**
2070  * i40e_vsi_setup_tx_resources - Allocate VSI Tx queue resources
2071  * @vsi: ptr to the VSI
2072  *
2073  * If this function returns with an error, then it's possible one or
2074  * more of the rings is populated (while the rest are not).  It is the
2075  * callers duty to clean those orphaned rings.
2076  *
2077  * Return 0 on success, negative on failure
2078  **/
2079 static int i40e_vsi_setup_tx_resources(struct i40e_vsi *vsi)
2080 {
2081         int i, err = 0;
2082
2083         for (i = 0; i < vsi->num_queue_pairs && !err; i++)
2084                 err = i40e_setup_tx_descriptors(vsi->tx_rings[i]);
2085
2086         return err;
2087 }
2088
2089 /**
2090  * i40e_vsi_free_tx_resources - Free Tx resources for VSI queues
2091  * @vsi: ptr to the VSI
2092  *
2093  * Free VSI's transmit software resources
2094  **/
2095 static void i40e_vsi_free_tx_resources(struct i40e_vsi *vsi)
2096 {
2097         int i;
2098
2099         if (!vsi->tx_rings)
2100                 return;
2101
2102         for (i = 0; i < vsi->num_queue_pairs; i++)
2103                 if (vsi->tx_rings[i] && vsi->tx_rings[i]->desc)
2104                         i40e_free_tx_resources(vsi->tx_rings[i]);
2105 }
2106
2107 /**
2108  * i40e_vsi_setup_rx_resources - Allocate VSI queues Rx resources
2109  * @vsi: ptr to the VSI
2110  *
2111  * If this function returns with an error, then it's possible one or
2112  * more of the rings is populated (while the rest are not).  It is the
2113  * callers duty to clean those orphaned rings.
2114  *
2115  * Return 0 on success, negative on failure
2116  **/
2117 static int i40e_vsi_setup_rx_resources(struct i40e_vsi *vsi)
2118 {
2119         int i, err = 0;
2120
2121         for (i = 0; i < vsi->num_queue_pairs && !err; i++)
2122                 err = i40e_setup_rx_descriptors(vsi->rx_rings[i]);
2123         return err;
2124 }
2125
2126 /**
2127  * i40e_vsi_free_rx_resources - Free Rx Resources for VSI queues
2128  * @vsi: ptr to the VSI
2129  *
2130  * Free all receive software resources
2131  **/
2132 static void i40e_vsi_free_rx_resources(struct i40e_vsi *vsi)
2133 {
2134         int i;
2135
2136         if (!vsi->rx_rings)
2137                 return;
2138
2139         for (i = 0; i < vsi->num_queue_pairs; i++)
2140                 if (vsi->rx_rings[i] && vsi->rx_rings[i]->desc)
2141                         i40e_free_rx_resources(vsi->rx_rings[i]);
2142 }
2143
2144 /**
2145  * i40e_configure_tx_ring - Configure a transmit ring context and rest
2146  * @ring: The Tx ring to configure
2147  *
2148  * Configure the Tx descriptor ring in the HMC context.
2149  **/
2150 static int i40e_configure_tx_ring(struct i40e_ring *ring)
2151 {
2152         struct i40e_vsi *vsi = ring->vsi;
2153         u16 pf_q = vsi->base_queue + ring->queue_index;
2154         struct i40e_hw *hw = &vsi->back->hw;
2155         struct i40e_hmc_obj_txq tx_ctx;
2156         i40e_status err = 0;
2157         u32 qtx_ctl = 0;
2158
2159         /* some ATR related tx ring init */
2160         if (vsi->back->flags & I40E_FLAG_FD_ATR_ENABLED) {
2161                 ring->atr_sample_rate = vsi->back->atr_sample_rate;
2162                 ring->atr_count = 0;
2163         } else {
2164                 ring->atr_sample_rate = 0;
2165         }
2166
2167         /* initialize XPS */
2168         if (ring->q_vector && ring->netdev &&
2169             vsi->tc_config.numtc <= 1 &&
2170             !test_and_set_bit(__I40E_TX_XPS_INIT_DONE, &ring->state))
2171                 netif_set_xps_queue(ring->netdev,
2172                                     &ring->q_vector->affinity_mask,
2173                                     ring->queue_index);
2174
2175         /* clear the context structure first */
2176         memset(&tx_ctx, 0, sizeof(tx_ctx));
2177
2178         tx_ctx.new_context = 1;
2179         tx_ctx.base = (ring->dma / 128);
2180         tx_ctx.qlen = ring->count;
2181         tx_ctx.fd_ena = !!(vsi->back->flags & (I40E_FLAG_FD_SB_ENABLED |
2182                                                I40E_FLAG_FD_ATR_ENABLED));
2183         tx_ctx.timesync_ena = !!(vsi->back->flags & I40E_FLAG_PTP);
2184         /* FDIR VSI tx ring can still use RS bit and writebacks */
2185         if (vsi->type != I40E_VSI_FDIR)
2186                 tx_ctx.head_wb_ena = 1;
2187         tx_ctx.head_wb_addr = ring->dma +
2188                               (ring->count * sizeof(struct i40e_tx_desc));
2189
2190         /* As part of VSI creation/update, FW allocates certain
2191          * Tx arbitration queue sets for each TC enabled for
2192          * the VSI. The FW returns the handles to these queue
2193          * sets as part of the response buffer to Add VSI,
2194          * Update VSI, etc. AQ commands. It is expected that
2195          * these queue set handles be associated with the Tx
2196          * queues by the driver as part of the TX queue context
2197          * initialization. This has to be done regardless of
2198          * DCB as by default everything is mapped to TC0.
2199          */
2200         tx_ctx.rdylist = le16_to_cpu(vsi->info.qs_handle[ring->dcb_tc]);
2201         tx_ctx.rdylist_act = 0;
2202
2203         /* clear the context in the HMC */
2204         err = i40e_clear_lan_tx_queue_context(hw, pf_q);
2205         if (err) {
2206                 dev_info(&vsi->back->pdev->dev,
2207                          "Failed to clear LAN Tx queue context on Tx ring %d (pf_q %d), error: %d\n",
2208                          ring->queue_index, pf_q, err);
2209                 return -ENOMEM;
2210         }
2211
2212         /* set the context in the HMC */
2213         err = i40e_set_lan_tx_queue_context(hw, pf_q, &tx_ctx);
2214         if (err) {
2215                 dev_info(&vsi->back->pdev->dev,
2216                          "Failed to set LAN Tx queue context on Tx ring %d (pf_q %d, error: %d\n",
2217                          ring->queue_index, pf_q, err);
2218                 return -ENOMEM;
2219         }
2220
2221         /* Now associate this queue with this PCI function */
2222         if (vsi->type == I40E_VSI_VMDQ2)
2223                 qtx_ctl = I40E_QTX_CTL_VM_QUEUE;
2224         else
2225                 qtx_ctl = I40E_QTX_CTL_PF_QUEUE;
2226         qtx_ctl |= ((hw->pf_id << I40E_QTX_CTL_PF_INDX_SHIFT) &
2227                     I40E_QTX_CTL_PF_INDX_MASK);
2228         wr32(hw, I40E_QTX_CTL(pf_q), qtx_ctl);
2229         i40e_flush(hw);
2230
2231         clear_bit(__I40E_HANG_CHECK_ARMED, &ring->state);
2232
2233         /* cache tail off for easier writes later */
2234         ring->tail = hw->hw_addr + I40E_QTX_TAIL(pf_q);
2235
2236         return 0;
2237 }
2238
2239 /**
2240  * i40e_configure_rx_ring - Configure a receive ring context
2241  * @ring: The Rx ring to configure
2242  *
2243  * Configure the Rx descriptor ring in the HMC context.
2244  **/
2245 static int i40e_configure_rx_ring(struct i40e_ring *ring)
2246 {
2247         struct i40e_vsi *vsi = ring->vsi;
2248         u32 chain_len = vsi->back->hw.func_caps.rx_buf_chain_len;
2249         u16 pf_q = vsi->base_queue + ring->queue_index;
2250         struct i40e_hw *hw = &vsi->back->hw;
2251         struct i40e_hmc_obj_rxq rx_ctx;
2252         i40e_status err = 0;
2253
2254         ring->state = 0;
2255
2256         /* clear the context structure first */
2257         memset(&rx_ctx, 0, sizeof(rx_ctx));
2258
2259         ring->rx_buf_len = vsi->rx_buf_len;
2260         ring->rx_hdr_len = vsi->rx_hdr_len;
2261
2262         rx_ctx.dbuff = ring->rx_buf_len >> I40E_RXQ_CTX_DBUFF_SHIFT;
2263         rx_ctx.hbuff = ring->rx_hdr_len >> I40E_RXQ_CTX_HBUFF_SHIFT;
2264
2265         rx_ctx.base = (ring->dma / 128);
2266         rx_ctx.qlen = ring->count;
2267
2268         if (vsi->back->flags & I40E_FLAG_16BYTE_RX_DESC_ENABLED) {
2269                 set_ring_16byte_desc_enabled(ring);
2270                 rx_ctx.dsize = 0;
2271         } else {
2272                 rx_ctx.dsize = 1;
2273         }
2274
2275         rx_ctx.dtype = vsi->dtype;
2276         if (vsi->dtype) {
2277                 set_ring_ps_enabled(ring);
2278                 rx_ctx.hsplit_0 = I40E_RX_SPLIT_L2      |
2279                                   I40E_RX_SPLIT_IP      |
2280                                   I40E_RX_SPLIT_TCP_UDP |
2281                                   I40E_RX_SPLIT_SCTP;
2282         } else {
2283                 rx_ctx.hsplit_0 = 0;
2284         }
2285
2286         rx_ctx.rxmax = min_t(u16, vsi->max_frame,
2287                                   (chain_len * ring->rx_buf_len));
2288         rx_ctx.tphrdesc_ena = 1;
2289         rx_ctx.tphwdesc_ena = 1;
2290         rx_ctx.tphdata_ena = 1;
2291         rx_ctx.tphhead_ena = 1;
2292         if (hw->revision_id == 0)
2293                 rx_ctx.lrxqthresh = 0;
2294         else
2295                 rx_ctx.lrxqthresh = 2;
2296         rx_ctx.crcstrip = 1;
2297         rx_ctx.l2tsel = 1;
2298         rx_ctx.showiv = 1;
2299
2300         /* clear the context in the HMC */
2301         err = i40e_clear_lan_rx_queue_context(hw, pf_q);
2302         if (err) {
2303                 dev_info(&vsi->back->pdev->dev,
2304                          "Failed to clear LAN Rx queue context on Rx ring %d (pf_q %d), error: %d\n",
2305                          ring->queue_index, pf_q, err);
2306                 return -ENOMEM;
2307         }
2308
2309         /* set the context in the HMC */
2310         err = i40e_set_lan_rx_queue_context(hw, pf_q, &rx_ctx);
2311         if (err) {
2312                 dev_info(&vsi->back->pdev->dev,
2313                          "Failed to set LAN Rx queue context on Rx ring %d (pf_q %d), error: %d\n",
2314                          ring->queue_index, pf_q, err);
2315                 return -ENOMEM;
2316         }
2317
2318         /* cache tail for quicker writes, and clear the reg before use */
2319         ring->tail = hw->hw_addr + I40E_QRX_TAIL(pf_q);
2320         writel(0, ring->tail);
2321
2322         i40e_alloc_rx_buffers(ring, I40E_DESC_UNUSED(ring));
2323
2324         return 0;
2325 }
2326
2327 /**
2328  * i40e_vsi_configure_tx - Configure the VSI for Tx
2329  * @vsi: VSI structure describing this set of rings and resources
2330  *
2331  * Configure the Tx VSI for operation.
2332  **/
2333 static int i40e_vsi_configure_tx(struct i40e_vsi *vsi)
2334 {
2335         int err = 0;
2336         u16 i;
2337
2338         for (i = 0; (i < vsi->num_queue_pairs) && !err; i++)
2339                 err = i40e_configure_tx_ring(vsi->tx_rings[i]);
2340
2341         return err;
2342 }
2343
2344 /**
2345  * i40e_vsi_configure_rx - Configure the VSI for Rx
2346  * @vsi: the VSI being configured
2347  *
2348  * Configure the Rx VSI for operation.
2349  **/
2350 static int i40e_vsi_configure_rx(struct i40e_vsi *vsi)
2351 {
2352         int err = 0;
2353         u16 i;
2354
2355         if (vsi->netdev && (vsi->netdev->mtu > ETH_DATA_LEN))
2356                 vsi->max_frame = vsi->netdev->mtu + ETH_HLEN
2357                                + ETH_FCS_LEN + VLAN_HLEN;
2358         else
2359                 vsi->max_frame = I40E_RXBUFFER_2048;
2360
2361         /* figure out correct receive buffer length */
2362         switch (vsi->back->flags & (I40E_FLAG_RX_1BUF_ENABLED |
2363                                     I40E_FLAG_RX_PS_ENABLED)) {
2364         case I40E_FLAG_RX_1BUF_ENABLED:
2365                 vsi->rx_hdr_len = 0;
2366                 vsi->rx_buf_len = vsi->max_frame;
2367                 vsi->dtype = I40E_RX_DTYPE_NO_SPLIT;
2368                 break;
2369         case I40E_FLAG_RX_PS_ENABLED:
2370                 vsi->rx_hdr_len = I40E_RX_HDR_SIZE;
2371                 vsi->rx_buf_len = I40E_RXBUFFER_2048;
2372                 vsi->dtype = I40E_RX_DTYPE_HEADER_SPLIT;
2373                 break;
2374         default:
2375                 vsi->rx_hdr_len = I40E_RX_HDR_SIZE;
2376                 vsi->rx_buf_len = I40E_RXBUFFER_2048;
2377                 vsi->dtype = I40E_RX_DTYPE_SPLIT_ALWAYS;
2378                 break;
2379         }
2380
2381         /* round up for the chip's needs */
2382         vsi->rx_hdr_len = ALIGN(vsi->rx_hdr_len,
2383                                 (1 << I40E_RXQ_CTX_HBUFF_SHIFT));
2384         vsi->rx_buf_len = ALIGN(vsi->rx_buf_len,
2385                                 (1 << I40E_RXQ_CTX_DBUFF_SHIFT));
2386
2387         /* set up individual rings */
2388         for (i = 0; i < vsi->num_queue_pairs && !err; i++)
2389                 err = i40e_configure_rx_ring(vsi->rx_rings[i]);
2390
2391         return err;
2392 }
2393
2394 /**
2395  * i40e_vsi_config_dcb_rings - Update rings to reflect DCB TC
2396  * @vsi: ptr to the VSI
2397  **/
2398 static void i40e_vsi_config_dcb_rings(struct i40e_vsi *vsi)
2399 {
2400         u16 qoffset, qcount;
2401         int i, n;
2402
2403         if (!(vsi->back->flags & I40E_FLAG_DCB_ENABLED))
2404                 return;
2405
2406         for (n = 0; n < I40E_MAX_TRAFFIC_CLASS; n++) {
2407                 if (!(vsi->tc_config.enabled_tc & (1 << n)))
2408                         continue;
2409
2410                 qoffset = vsi->tc_config.tc_info[n].qoffset;
2411                 qcount = vsi->tc_config.tc_info[n].qcount;
2412                 for (i = qoffset; i < (qoffset + qcount); i++) {
2413                         struct i40e_ring *rx_ring = vsi->rx_rings[i];
2414                         struct i40e_ring *tx_ring = vsi->tx_rings[i];
2415                         rx_ring->dcb_tc = n;
2416                         tx_ring->dcb_tc = n;
2417                 }
2418         }
2419 }
2420
2421 /**
2422  * i40e_set_vsi_rx_mode - Call set_rx_mode on a VSI
2423  * @vsi: ptr to the VSI
2424  **/
2425 static void i40e_set_vsi_rx_mode(struct i40e_vsi *vsi)
2426 {
2427         if (vsi->netdev)
2428                 i40e_set_rx_mode(vsi->netdev);
2429 }
2430
2431 /**
2432  * i40e_fdir_filter_restore - Restore the Sideband Flow Director filters
2433  * @vsi: Pointer to the targeted VSI
2434  *
2435  * This function replays the hlist on the hw where all the SB Flow Director
2436  * filters were saved.
2437  **/
2438 static void i40e_fdir_filter_restore(struct i40e_vsi *vsi)
2439 {
2440         struct i40e_fdir_filter *filter;
2441         struct i40e_pf *pf = vsi->back;
2442         struct hlist_node *node;
2443
2444         if (!(pf->flags & I40E_FLAG_FD_SB_ENABLED))
2445                 return;
2446
2447         hlist_for_each_entry_safe(filter, node,
2448                                   &pf->fdir_filter_list, fdir_node) {
2449                 i40e_add_del_fdir(vsi, filter, true);
2450         }
2451 }
2452
2453 /**
2454  * i40e_vsi_configure - Set up the VSI for action
2455  * @vsi: the VSI being configured
2456  **/
2457 static int i40e_vsi_configure(struct i40e_vsi *vsi)
2458 {
2459         int err;
2460
2461         i40e_set_vsi_rx_mode(vsi);
2462         i40e_restore_vlan(vsi);
2463         i40e_vsi_config_dcb_rings(vsi);
2464         err = i40e_vsi_configure_tx(vsi);
2465         if (!err)
2466                 err = i40e_vsi_configure_rx(vsi);
2467
2468         return err;
2469 }
2470
2471 /**
2472  * i40e_vsi_configure_msix - MSIX mode Interrupt Config in the HW
2473  * @vsi: the VSI being configured
2474  **/
2475 static void i40e_vsi_configure_msix(struct i40e_vsi *vsi)
2476 {
2477         struct i40e_pf *pf = vsi->back;
2478         struct i40e_q_vector *q_vector;
2479         struct i40e_hw *hw = &pf->hw;
2480         u16 vector;
2481         int i, q;
2482         u32 val;
2483         u32 qp;
2484
2485         /* The interrupt indexing is offset by 1 in the PFINT_ITRn
2486          * and PFINT_LNKLSTn registers, e.g.:
2487          *   PFINT_ITRn[0..n-1] gets msix-1..msix-n  (qpair interrupts)
2488          */
2489         qp = vsi->base_queue;
2490         vector = vsi->base_vector;
2491         for (i = 0; i < vsi->num_q_vectors; i++, vector++) {
2492                 q_vector = vsi->q_vectors[i];
2493                 q_vector->rx.itr = ITR_TO_REG(vsi->rx_itr_setting);
2494                 q_vector->rx.latency_range = I40E_LOW_LATENCY;
2495                 wr32(hw, I40E_PFINT_ITRN(I40E_RX_ITR, vector - 1),
2496                      q_vector->rx.itr);
2497                 q_vector->tx.itr = ITR_TO_REG(vsi->tx_itr_setting);
2498                 q_vector->tx.latency_range = I40E_LOW_LATENCY;
2499                 wr32(hw, I40E_PFINT_ITRN(I40E_TX_ITR, vector - 1),
2500                      q_vector->tx.itr);
2501
2502                 /* Linked list for the queuepairs assigned to this vector */
2503                 wr32(hw, I40E_PFINT_LNKLSTN(vector - 1), qp);
2504                 for (q = 0; q < q_vector->num_ringpairs; q++) {
2505                         val = I40E_QINT_RQCTL_CAUSE_ENA_MASK |
2506                               (I40E_RX_ITR << I40E_QINT_RQCTL_ITR_INDX_SHIFT)  |
2507                               (vector      << I40E_QINT_RQCTL_MSIX_INDX_SHIFT) |
2508                               (qp          << I40E_QINT_RQCTL_NEXTQ_INDX_SHIFT)|
2509                               (I40E_QUEUE_TYPE_TX
2510                                       << I40E_QINT_RQCTL_NEXTQ_TYPE_SHIFT);
2511
2512                         wr32(hw, I40E_QINT_RQCTL(qp), val);
2513
2514                         val = I40E_QINT_TQCTL_CAUSE_ENA_MASK |
2515                               (I40E_TX_ITR << I40E_QINT_TQCTL_ITR_INDX_SHIFT)  |
2516                               (vector      << I40E_QINT_TQCTL_MSIX_INDX_SHIFT) |
2517                               ((qp+1)      << I40E_QINT_TQCTL_NEXTQ_INDX_SHIFT)|
2518                               (I40E_QUEUE_TYPE_RX
2519                                       << I40E_QINT_TQCTL_NEXTQ_TYPE_SHIFT);
2520
2521                         /* Terminate the linked list */
2522                         if (q == (q_vector->num_ringpairs - 1))
2523                                 val |= (I40E_QUEUE_END_OF_LIST
2524                                            << I40E_QINT_TQCTL_NEXTQ_INDX_SHIFT);
2525
2526                         wr32(hw, I40E_QINT_TQCTL(qp), val);
2527                         qp++;
2528                 }
2529         }
2530
2531         i40e_flush(hw);
2532 }
2533
2534 /**
2535  * i40e_enable_misc_int_causes - enable the non-queue interrupts
2536  * @hw: ptr to the hardware info
2537  **/
2538 static void i40e_enable_misc_int_causes(struct i40e_hw *hw)
2539 {
2540         u32 val;
2541
2542         /* clear things first */
2543         wr32(hw, I40E_PFINT_ICR0_ENA, 0);  /* disable all */
2544         rd32(hw, I40E_PFINT_ICR0);         /* read to clear */
2545
2546         val = I40E_PFINT_ICR0_ENA_ECC_ERR_MASK       |
2547               I40E_PFINT_ICR0_ENA_MAL_DETECT_MASK    |
2548               I40E_PFINT_ICR0_ENA_GRST_MASK          |
2549               I40E_PFINT_ICR0_ENA_PCI_EXCEPTION_MASK |
2550               I40E_PFINT_ICR0_ENA_GPIO_MASK          |
2551               I40E_PFINT_ICR0_ENA_TIMESYNC_MASK      |
2552               I40E_PFINT_ICR0_ENA_STORM_DETECT_MASK  |
2553               I40E_PFINT_ICR0_ENA_HMC_ERR_MASK       |
2554               I40E_PFINT_ICR0_ENA_VFLR_MASK          |
2555               I40E_PFINT_ICR0_ENA_ADMINQ_MASK;
2556
2557         wr32(hw, I40E_PFINT_ICR0_ENA, val);
2558
2559         /* SW_ITR_IDX = 0, but don't change INTENA */
2560         wr32(hw, I40E_PFINT_DYN_CTL0, I40E_PFINT_DYN_CTL0_SW_ITR_INDX_MASK |
2561                                         I40E_PFINT_DYN_CTL0_INTENA_MSK_MASK);
2562
2563         /* OTHER_ITR_IDX = 0 */
2564         wr32(hw, I40E_PFINT_STAT_CTL0, 0);
2565 }
2566
2567 /**
2568  * i40e_configure_msi_and_legacy - Legacy mode interrupt config in the HW
2569  * @vsi: the VSI being configured
2570  **/
2571 static void i40e_configure_msi_and_legacy(struct i40e_vsi *vsi)
2572 {
2573         struct i40e_q_vector *q_vector = vsi->q_vectors[0];
2574         struct i40e_pf *pf = vsi->back;
2575         struct i40e_hw *hw = &pf->hw;
2576         u32 val;
2577
2578         /* set the ITR configuration */
2579         q_vector->rx.itr = ITR_TO_REG(vsi->rx_itr_setting);
2580         q_vector->rx.latency_range = I40E_LOW_LATENCY;
2581         wr32(hw, I40E_PFINT_ITR0(I40E_RX_ITR), q_vector->rx.itr);
2582         q_vector->tx.itr = ITR_TO_REG(vsi->tx_itr_setting);
2583         q_vector->tx.latency_range = I40E_LOW_LATENCY;
2584         wr32(hw, I40E_PFINT_ITR0(I40E_TX_ITR), q_vector->tx.itr);
2585
2586         i40e_enable_misc_int_causes(hw);
2587
2588         /* FIRSTQ_INDX = 0, FIRSTQ_TYPE = 0 (rx) */
2589         wr32(hw, I40E_PFINT_LNKLST0, 0);
2590
2591         /* Associate the queue pair to the vector and enable the queue int */
2592         val = I40E_QINT_RQCTL_CAUSE_ENA_MASK                  |
2593               (I40E_RX_ITR << I40E_QINT_RQCTL_ITR_INDX_SHIFT) |
2594               (I40E_QUEUE_TYPE_TX << I40E_QINT_TQCTL_NEXTQ_TYPE_SHIFT);
2595
2596         wr32(hw, I40E_QINT_RQCTL(0), val);
2597
2598         val = I40E_QINT_TQCTL_CAUSE_ENA_MASK                  |
2599               (I40E_TX_ITR << I40E_QINT_TQCTL_ITR_INDX_SHIFT) |
2600               (I40E_QUEUE_END_OF_LIST << I40E_QINT_TQCTL_NEXTQ_INDX_SHIFT);
2601
2602         wr32(hw, I40E_QINT_TQCTL(0), val);
2603         i40e_flush(hw);
2604 }
2605
2606 /**
2607  * i40e_irq_dynamic_disable_icr0 - Disable default interrupt generation for icr0
2608  * @pf: board private structure
2609  **/
2610 void i40e_irq_dynamic_disable_icr0(struct i40e_pf *pf)
2611 {
2612         struct i40e_hw *hw = &pf->hw;
2613
2614         wr32(hw, I40E_PFINT_DYN_CTL0,
2615              I40E_ITR_NONE << I40E_PFINT_DYN_CTLN_ITR_INDX_SHIFT);
2616         i40e_flush(hw);
2617 }
2618
2619 /**
2620  * i40e_irq_dynamic_enable_icr0 - Enable default interrupt generation for icr0
2621  * @pf: board private structure
2622  **/
2623 void i40e_irq_dynamic_enable_icr0(struct i40e_pf *pf)
2624 {
2625         struct i40e_hw *hw = &pf->hw;
2626         u32 val;
2627
2628         val = I40E_PFINT_DYN_CTL0_INTENA_MASK   |
2629               I40E_PFINT_DYN_CTL0_CLEARPBA_MASK |
2630               (I40E_ITR_NONE << I40E_PFINT_DYN_CTL0_ITR_INDX_SHIFT);
2631
2632         wr32(hw, I40E_PFINT_DYN_CTL0, val);
2633         i40e_flush(hw);
2634 }
2635
2636 /**
2637  * i40e_irq_dynamic_enable - Enable default interrupt generation settings
2638  * @vsi: pointer to a vsi
2639  * @vector: enable a particular Hw Interrupt vector
2640  **/
2641 void i40e_irq_dynamic_enable(struct i40e_vsi *vsi, int vector)
2642 {
2643         struct i40e_pf *pf = vsi->back;
2644         struct i40e_hw *hw = &pf->hw;
2645         u32 val;
2646
2647         val = I40E_PFINT_DYN_CTLN_INTENA_MASK |
2648               I40E_PFINT_DYN_CTLN_CLEARPBA_MASK |
2649               (I40E_ITR_NONE << I40E_PFINT_DYN_CTLN_ITR_INDX_SHIFT);
2650         wr32(hw, I40E_PFINT_DYN_CTLN(vector - 1), val);
2651         /* skip the flush */
2652 }
2653
2654 /**
2655  * i40e_msix_clean_rings - MSIX mode Interrupt Handler
2656  * @irq: interrupt number
2657  * @data: pointer to a q_vector
2658  **/
2659 static irqreturn_t i40e_msix_clean_rings(int irq, void *data)
2660 {
2661         struct i40e_q_vector *q_vector = data;
2662
2663         if (!q_vector->tx.ring && !q_vector->rx.ring)
2664                 return IRQ_HANDLED;
2665
2666         napi_schedule(&q_vector->napi);
2667
2668         return IRQ_HANDLED;
2669 }
2670
2671 /**
2672  * i40e_vsi_request_irq_msix - Initialize MSI-X interrupts
2673  * @vsi: the VSI being configured
2674  * @basename: name for the vector
2675  *
2676  * Allocates MSI-X vectors and requests interrupts from the kernel.
2677  **/
2678 static int i40e_vsi_request_irq_msix(struct i40e_vsi *vsi, char *basename)
2679 {
2680         int q_vectors = vsi->num_q_vectors;
2681         struct i40e_pf *pf = vsi->back;
2682         int base = vsi->base_vector;
2683         int rx_int_idx = 0;
2684         int tx_int_idx = 0;
2685         int vector, err;
2686
2687         for (vector = 0; vector < q_vectors; vector++) {
2688                 struct i40e_q_vector *q_vector = vsi->q_vectors[vector];
2689
2690                 if (q_vector->tx.ring && q_vector->rx.ring) {
2691                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2692                                  "%s-%s-%d", basename, "TxRx", rx_int_idx++);
2693                         tx_int_idx++;
2694                 } else if (q_vector->rx.ring) {
2695                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2696                                  "%s-%s-%d", basename, "rx", rx_int_idx++);
2697                 } else if (q_vector->tx.ring) {
2698                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
2699                                  "%s-%s-%d", basename, "tx", tx_int_idx++);
2700                 } else {
2701                         /* skip this unused q_vector */
2702                         continue;
2703                 }
2704                 err = request_irq(pf->msix_entries[base + vector].vector,
2705                                   vsi->irq_handler,
2706                                   0,
2707                                   q_vector->name,
2708                                   q_vector);
2709                 if (err) {
2710                         dev_info(&pf->pdev->dev,
2711                                  "%s: request_irq failed, error: %d\n",
2712                                  __func__, err);
2713                         goto free_queue_irqs;
2714                 }
2715                 /* assign the mask for this irq */
2716                 irq_set_affinity_hint(pf->msix_entries[base + vector].vector,
2717                                       &q_vector->affinity_mask);
2718         }
2719
2720         return 0;
2721
2722 free_queue_irqs:
2723         while (vector) {
2724                 vector--;
2725                 irq_set_affinity_hint(pf->msix_entries[base + vector].vector,
2726                                       NULL);
2727                 free_irq(pf->msix_entries[base + vector].vector,
2728                          &(vsi->q_vectors[vector]));
2729         }
2730         return err;
2731 }
2732
2733 /**
2734  * i40e_vsi_disable_irq - Mask off queue interrupt generation on the VSI
2735  * @vsi: the VSI being un-configured
2736  **/
2737 static void i40e_vsi_disable_irq(struct i40e_vsi *vsi)
2738 {
2739         struct i40e_pf *pf = vsi->back;
2740         struct i40e_hw *hw = &pf->hw;
2741         int base = vsi->base_vector;
2742         int i;
2743
2744         for (i = 0; i < vsi->num_queue_pairs; i++) {
2745                 wr32(hw, I40E_QINT_TQCTL(vsi->tx_rings[i]->reg_idx), 0);
2746                 wr32(hw, I40E_QINT_RQCTL(vsi->rx_rings[i]->reg_idx), 0);
2747         }
2748
2749         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
2750                 for (i = vsi->base_vector;
2751                      i < (vsi->num_q_vectors + vsi->base_vector); i++)
2752                         wr32(hw, I40E_PFINT_DYN_CTLN(i - 1), 0);
2753
2754                 i40e_flush(hw);
2755                 for (i = 0; i < vsi->num_q_vectors; i++)
2756                         synchronize_irq(pf->msix_entries[i + base].vector);
2757         } else {
2758                 /* Legacy and MSI mode - this stops all interrupt handling */
2759                 wr32(hw, I40E_PFINT_ICR0_ENA, 0);
2760                 wr32(hw, I40E_PFINT_DYN_CTL0, 0);
2761                 i40e_flush(hw);
2762                 synchronize_irq(pf->pdev->irq);
2763         }
2764 }
2765
2766 /**
2767  * i40e_vsi_enable_irq - Enable IRQ for the given VSI
2768  * @vsi: the VSI being configured
2769  **/
2770 static int i40e_vsi_enable_irq(struct i40e_vsi *vsi)
2771 {
2772         struct i40e_pf *pf = vsi->back;
2773         int i;
2774
2775         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
2776                 for (i = vsi->base_vector;
2777                      i < (vsi->num_q_vectors + vsi->base_vector); i++)
2778                         i40e_irq_dynamic_enable(vsi, i);
2779         } else {
2780                 i40e_irq_dynamic_enable_icr0(pf);
2781         }
2782
2783         i40e_flush(&pf->hw);
2784         return 0;
2785 }
2786
2787 /**
2788  * i40e_stop_misc_vector - Stop the vector that handles non-queue events
2789  * @pf: board private structure
2790  **/
2791 static void i40e_stop_misc_vector(struct i40e_pf *pf)
2792 {
2793         /* Disable ICR 0 */
2794         wr32(&pf->hw, I40E_PFINT_ICR0_ENA, 0);
2795         i40e_flush(&pf->hw);
2796 }
2797
2798 /**
2799  * i40e_intr - MSI/Legacy and non-queue interrupt handler
2800  * @irq: interrupt number
2801  * @data: pointer to a q_vector
2802  *
2803  * This is the handler used for all MSI/Legacy interrupts, and deals
2804  * with both queue and non-queue interrupts.  This is also used in
2805  * MSIX mode to handle the non-queue interrupts.
2806  **/
2807 static irqreturn_t i40e_intr(int irq, void *data)
2808 {
2809         struct i40e_pf *pf = (struct i40e_pf *)data;
2810         struct i40e_hw *hw = &pf->hw;
2811         irqreturn_t ret = IRQ_NONE;
2812         u32 icr0, icr0_remaining;
2813         u32 val, ena_mask;
2814
2815         icr0 = rd32(hw, I40E_PFINT_ICR0);
2816         ena_mask = rd32(hw, I40E_PFINT_ICR0_ENA);
2817
2818         /* if sharing a legacy IRQ, we might get called w/o an intr pending */
2819         if ((icr0 & I40E_PFINT_ICR0_INTEVENT_MASK) == 0)
2820                 goto enable_intr;
2821
2822         /* if interrupt but no bits showing, must be SWINT */
2823         if (((icr0 & ~I40E_PFINT_ICR0_INTEVENT_MASK) == 0) ||
2824             (icr0 & I40E_PFINT_ICR0_SWINT_MASK))
2825                 pf->sw_int_count++;
2826
2827         /* only q0 is used in MSI/Legacy mode, and none are used in MSIX */
2828         if (icr0 & I40E_PFINT_ICR0_QUEUE_0_MASK) {
2829
2830                 /* temporarily disable queue cause for NAPI processing */
2831                 u32 qval = rd32(hw, I40E_QINT_RQCTL(0));
2832                 qval &= ~I40E_QINT_RQCTL_CAUSE_ENA_MASK;
2833                 wr32(hw, I40E_QINT_RQCTL(0), qval);
2834
2835                 qval = rd32(hw, I40E_QINT_TQCTL(0));
2836                 qval &= ~I40E_QINT_TQCTL_CAUSE_ENA_MASK;
2837                 wr32(hw, I40E_QINT_TQCTL(0), qval);
2838
2839                 if (!test_bit(__I40E_DOWN, &pf->state))
2840                         napi_schedule(&pf->vsi[pf->lan_vsi]->q_vectors[0]->napi);
2841         }
2842
2843         if (icr0 & I40E_PFINT_ICR0_ADMINQ_MASK) {
2844                 ena_mask &= ~I40E_PFINT_ICR0_ENA_ADMINQ_MASK;
2845                 set_bit(__I40E_ADMINQ_EVENT_PENDING, &pf->state);
2846         }
2847
2848         if (icr0 & I40E_PFINT_ICR0_MAL_DETECT_MASK) {
2849                 ena_mask &= ~I40E_PFINT_ICR0_ENA_MAL_DETECT_MASK;
2850                 set_bit(__I40E_MDD_EVENT_PENDING, &pf->state);
2851         }
2852
2853         if (icr0 & I40E_PFINT_ICR0_VFLR_MASK) {
2854                 ena_mask &= ~I40E_PFINT_ICR0_ENA_VFLR_MASK;
2855                 set_bit(__I40E_VFLR_EVENT_PENDING, &pf->state);
2856         }
2857
2858         if (icr0 & I40E_PFINT_ICR0_GRST_MASK) {
2859                 if (!test_bit(__I40E_RESET_RECOVERY_PENDING, &pf->state))
2860                         set_bit(__I40E_RESET_INTR_RECEIVED, &pf->state);
2861                 ena_mask &= ~I40E_PFINT_ICR0_ENA_GRST_MASK;
2862                 val = rd32(hw, I40E_GLGEN_RSTAT);
2863                 val = (val & I40E_GLGEN_RSTAT_RESET_TYPE_MASK)
2864                        >> I40E_GLGEN_RSTAT_RESET_TYPE_SHIFT;
2865                 if (val == I40E_RESET_CORER)
2866                         pf->corer_count++;
2867                 else if (val == I40E_RESET_GLOBR)
2868                         pf->globr_count++;
2869                 else if (val == I40E_RESET_EMPR)
2870                         pf->empr_count++;
2871         }
2872
2873         if (icr0 & I40E_PFINT_ICR0_HMC_ERR_MASK) {
2874                 icr0 &= ~I40E_PFINT_ICR0_HMC_ERR_MASK;
2875                 dev_info(&pf->pdev->dev, "HMC error interrupt\n");
2876         }
2877
2878         if (icr0 & I40E_PFINT_ICR0_TIMESYNC_MASK) {
2879                 u32 prttsyn_stat = rd32(hw, I40E_PRTTSYN_STAT_0);
2880
2881                 if (prttsyn_stat & I40E_PRTTSYN_STAT_0_TXTIME_MASK) {
2882                         ena_mask &= ~I40E_PFINT_ICR0_ENA_TIMESYNC_MASK;
2883                         i40e_ptp_tx_hwtstamp(pf);
2884                         prttsyn_stat &= ~I40E_PRTTSYN_STAT_0_TXTIME_MASK;
2885                 }
2886
2887                 wr32(hw, I40E_PRTTSYN_STAT_0, prttsyn_stat);
2888         }
2889
2890         /* If a critical error is pending we have no choice but to reset the
2891          * device.
2892          * Report and mask out any remaining unexpected interrupts.
2893          */
2894         icr0_remaining = icr0 & ena_mask;
2895         if (icr0_remaining) {
2896                 dev_info(&pf->pdev->dev, "unhandled interrupt icr0=0x%08x\n",
2897                          icr0_remaining);
2898                 if ((icr0_remaining & I40E_PFINT_ICR0_PE_CRITERR_MASK) ||
2899                     (icr0_remaining & I40E_PFINT_ICR0_PCI_EXCEPTION_MASK) ||
2900                     (icr0_remaining & I40E_PFINT_ICR0_ECC_ERR_MASK)) {
2901                         dev_info(&pf->pdev->dev, "device will be reset\n");
2902                         set_bit(__I40E_PF_RESET_REQUESTED, &pf->state);
2903                         i40e_service_event_schedule(pf);
2904                 }
2905                 ena_mask &= ~icr0_remaining;
2906         }
2907         ret = IRQ_HANDLED;
2908
2909 enable_intr:
2910         /* re-enable interrupt causes */
2911         wr32(hw, I40E_PFINT_ICR0_ENA, ena_mask);
2912         if (!test_bit(__I40E_DOWN, &pf->state)) {
2913                 i40e_service_event_schedule(pf);
2914                 i40e_irq_dynamic_enable_icr0(pf);
2915         }
2916
2917         return ret;
2918 }
2919
2920 /**
2921  * i40e_clean_fdir_tx_irq - Reclaim resources after transmit completes
2922  * @tx_ring:  tx ring to clean
2923  * @budget:   how many cleans we're allowed
2924  *
2925  * Returns true if there's any budget left (e.g. the clean is finished)
2926  **/
2927 static bool i40e_clean_fdir_tx_irq(struct i40e_ring *tx_ring, int budget)
2928 {
2929         struct i40e_vsi *vsi = tx_ring->vsi;
2930         u16 i = tx_ring->next_to_clean;
2931         struct i40e_tx_buffer *tx_buf;
2932         struct i40e_tx_desc *tx_desc;
2933
2934         tx_buf = &tx_ring->tx_bi[i];
2935         tx_desc = I40E_TX_DESC(tx_ring, i);
2936         i -= tx_ring->count;
2937
2938         do {
2939                 struct i40e_tx_desc *eop_desc = tx_buf->next_to_watch;
2940
2941                 /* if next_to_watch is not set then there is no work pending */
2942                 if (!eop_desc)
2943                         break;
2944
2945                 /* prevent any other reads prior to eop_desc */
2946                 read_barrier_depends();
2947
2948                 /* if the descriptor isn't done, no work yet to do */
2949                 if (!(eop_desc->cmd_type_offset_bsz &
2950                       cpu_to_le64(I40E_TX_DESC_DTYPE_DESC_DONE)))
2951                         break;
2952
2953                 /* clear next_to_watch to prevent false hangs */
2954                 tx_buf->next_to_watch = NULL;
2955
2956                 /* unmap skb header data */
2957                 dma_unmap_single(tx_ring->dev,
2958                                  dma_unmap_addr(tx_buf, dma),
2959                                  dma_unmap_len(tx_buf, len),
2960                                  DMA_TO_DEVICE);
2961
2962                 dma_unmap_len_set(tx_buf, len, 0);
2963
2964
2965                 /* move to the next desc and buffer to clean */
2966                 tx_buf++;
2967                 tx_desc++;
2968                 i++;
2969                 if (unlikely(!i)) {
2970                         i -= tx_ring->count;
2971                         tx_buf = tx_ring->tx_bi;
2972                         tx_desc = I40E_TX_DESC(tx_ring, 0);
2973                 }
2974
2975                 /* update budget accounting */
2976                 budget--;
2977         } while (likely(budget));
2978
2979         i += tx_ring->count;
2980         tx_ring->next_to_clean = i;
2981
2982         if (vsi->back->flags & I40E_FLAG_MSIX_ENABLED) {
2983                 i40e_irq_dynamic_enable(vsi,
2984                                 tx_ring->q_vector->v_idx + vsi->base_vector);
2985         }
2986         return budget > 0;
2987 }
2988
2989 /**
2990  * i40e_fdir_clean_ring - Interrupt Handler for FDIR SB ring
2991  * @irq: interrupt number
2992  * @data: pointer to a q_vector
2993  **/
2994 static irqreturn_t i40e_fdir_clean_ring(int irq, void *data)
2995 {
2996         struct i40e_q_vector *q_vector = data;
2997         struct i40e_vsi *vsi;
2998
2999         if (!q_vector->tx.ring)
3000                 return IRQ_HANDLED;
3001
3002         vsi = q_vector->tx.ring->vsi;
3003         i40e_clean_fdir_tx_irq(q_vector->tx.ring, vsi->work_limit);
3004
3005         return IRQ_HANDLED;
3006 }
3007
3008 /**
3009  * i40e_map_vector_to_qp - Assigns the queue pair to the vector
3010  * @vsi: the VSI being configured
3011  * @v_idx: vector index
3012  * @qp_idx: queue pair index
3013  **/
3014 static void map_vector_to_qp(struct i40e_vsi *vsi, int v_idx, int qp_idx)
3015 {
3016         struct i40e_q_vector *q_vector = vsi->q_vectors[v_idx];
3017         struct i40e_ring *tx_ring = vsi->tx_rings[qp_idx];
3018         struct i40e_ring *rx_ring = vsi->rx_rings[qp_idx];
3019
3020         tx_ring->q_vector = q_vector;
3021         tx_ring->next = q_vector->tx.ring;
3022         q_vector->tx.ring = tx_ring;
3023         q_vector->tx.count++;
3024
3025         rx_ring->q_vector = q_vector;
3026         rx_ring->next = q_vector->rx.ring;
3027         q_vector->rx.ring = rx_ring;
3028         q_vector->rx.count++;
3029 }
3030
3031 /**
3032  * i40e_vsi_map_rings_to_vectors - Maps descriptor rings to vectors
3033  * @vsi: the VSI being configured
3034  *
3035  * This function maps descriptor rings to the queue-specific vectors
3036  * we were allotted through the MSI-X enabling code.  Ideally, we'd have
3037  * one vector per queue pair, but on a constrained vector budget, we
3038  * group the queue pairs as "efficiently" as possible.
3039  **/
3040 static void i40e_vsi_map_rings_to_vectors(struct i40e_vsi *vsi)
3041 {
3042         int qp_remaining = vsi->num_queue_pairs;
3043         int q_vectors = vsi->num_q_vectors;
3044         int num_ringpairs;
3045         int v_start = 0;
3046         int qp_idx = 0;
3047
3048         /* If we don't have enough vectors for a 1-to-1 mapping, we'll have to
3049          * group them so there are multiple queues per vector.
3050          */
3051         for (; v_start < q_vectors && qp_remaining; v_start++) {
3052                 struct i40e_q_vector *q_vector = vsi->q_vectors[v_start];
3053
3054                 num_ringpairs = DIV_ROUND_UP(qp_remaining, q_vectors - v_start);
3055
3056                 q_vector->num_ringpairs = num_ringpairs;
3057
3058                 q_vector->rx.count = 0;
3059                 q_vector->tx.count = 0;
3060                 q_vector->rx.ring = NULL;
3061                 q_vector->tx.ring = NULL;
3062
3063                 while (num_ringpairs--) {
3064                         map_vector_to_qp(vsi, v_start, qp_idx);
3065                         qp_idx++;
3066                         qp_remaining--;
3067                 }
3068         }
3069 }
3070
3071 /**
3072  * i40e_vsi_request_irq - Request IRQ from the OS
3073  * @vsi: the VSI being configured
3074  * @basename: name for the vector
3075  **/
3076 static int i40e_vsi_request_irq(struct i40e_vsi *vsi, char *basename)
3077 {
3078         struct i40e_pf *pf = vsi->back;
3079         int err;
3080
3081         if (pf->flags & I40E_FLAG_MSIX_ENABLED)
3082                 err = i40e_vsi_request_irq_msix(vsi, basename);
3083         else if (pf->flags & I40E_FLAG_MSI_ENABLED)
3084                 err = request_irq(pf->pdev->irq, i40e_intr, 0,
3085                                   pf->misc_int_name, pf);
3086         else
3087                 err = request_irq(pf->pdev->irq, i40e_intr, IRQF_SHARED,
3088                                   pf->misc_int_name, pf);
3089
3090         if (err)
3091                 dev_info(&pf->pdev->dev, "request_irq failed, Error %d\n", err);
3092
3093         return err;
3094 }
3095
3096 #ifdef CONFIG_NET_POLL_CONTROLLER
3097 /**
3098  * i40e_netpoll - A Polling 'interrupt'handler
3099  * @netdev: network interface device structure
3100  *
3101  * This is used by netconsole to send skbs without having to re-enable
3102  * interrupts.  It's not called while the normal interrupt routine is executing.
3103  **/
3104 static void i40e_netpoll(struct net_device *netdev)
3105 {
3106         struct i40e_netdev_priv *np = netdev_priv(netdev);
3107         struct i40e_vsi *vsi = np->vsi;
3108         struct i40e_pf *pf = vsi->back;
3109         int i;
3110
3111         /* if interface is down do nothing */
3112         if (test_bit(__I40E_DOWN, &vsi->state))
3113                 return;
3114
3115         pf->flags |= I40E_FLAG_IN_NETPOLL;
3116         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
3117                 for (i = 0; i < vsi->num_q_vectors; i++)
3118                         i40e_msix_clean_rings(0, vsi->q_vectors[i]);
3119         } else {
3120                 i40e_intr(pf->pdev->irq, netdev);
3121         }
3122         pf->flags &= ~I40E_FLAG_IN_NETPOLL;
3123 }
3124 #endif
3125
3126 /**
3127  * i40e_vsi_control_tx - Start or stop a VSI's rings
3128  * @vsi: the VSI being configured
3129  * @enable: start or stop the rings
3130  **/
3131 static int i40e_vsi_control_tx(struct i40e_vsi *vsi, bool enable)
3132 {
3133         struct i40e_pf *pf = vsi->back;
3134         struct i40e_hw *hw = &pf->hw;
3135         int i, j, pf_q;
3136         u32 tx_reg;
3137
3138         pf_q = vsi->base_queue;
3139         for (i = 0; i < vsi->num_queue_pairs; i++, pf_q++) {
3140                 for (j = 0; j < 50; j++) {
3141                         tx_reg = rd32(hw, I40E_QTX_ENA(pf_q));
3142                         if (((tx_reg >> I40E_QTX_ENA_QENA_REQ_SHIFT) & 1) ==
3143                             ((tx_reg >> I40E_QTX_ENA_QENA_STAT_SHIFT) & 1))
3144                                 break;
3145                         usleep_range(1000, 2000);
3146                 }
3147                 /* Skip if the queue is already in the requested state */
3148                 if (enable && (tx_reg & I40E_QTX_ENA_QENA_STAT_MASK))
3149                         continue;
3150                 if (!enable && !(tx_reg & I40E_QTX_ENA_QENA_STAT_MASK))
3151                         continue;
3152
3153                 /* turn on/off the queue */
3154                 if (enable) {
3155                         wr32(hw, I40E_QTX_HEAD(pf_q), 0);
3156                         tx_reg |= I40E_QTX_ENA_QENA_REQ_MASK;
3157                 } else {
3158                         tx_reg &= ~I40E_QTX_ENA_QENA_REQ_MASK;
3159                 }
3160
3161                 wr32(hw, I40E_QTX_ENA(pf_q), tx_reg);
3162
3163                 /* wait for the change to finish */
3164                 for (j = 0; j < 10; j++) {
3165                         tx_reg = rd32(hw, I40E_QTX_ENA(pf_q));
3166                         if (enable) {
3167                                 if ((tx_reg & I40E_QTX_ENA_QENA_STAT_MASK))
3168                                         break;
3169                         } else {
3170                                 if (!(tx_reg & I40E_QTX_ENA_QENA_STAT_MASK))
3171                                         break;
3172                         }
3173
3174                         udelay(10);
3175                 }
3176                 if (j >= 10) {
3177                         dev_info(&pf->pdev->dev, "Tx ring %d %sable timeout\n",
3178                                  pf_q, (enable ? "en" : "dis"));
3179                         return -ETIMEDOUT;
3180                 }
3181         }
3182
3183         if (hw->revision_id == 0)
3184                 mdelay(50);
3185
3186         return 0;
3187 }
3188
3189 /**
3190  * i40e_vsi_control_rx - Start or stop a VSI's rings
3191  * @vsi: the VSI being configured
3192  * @enable: start or stop the rings
3193  **/
3194 static int i40e_vsi_control_rx(struct i40e_vsi *vsi, bool enable)
3195 {
3196         struct i40e_pf *pf = vsi->back;
3197         struct i40e_hw *hw = &pf->hw;
3198         int i, j, pf_q;
3199         u32 rx_reg;
3200
3201         pf_q = vsi->base_queue;
3202         for (i = 0; i < vsi->num_queue_pairs; i++, pf_q++) {
3203                 for (j = 0; j < 50; j++) {
3204                         rx_reg = rd32(hw, I40E_QRX_ENA(pf_q));
3205                         if (((rx_reg >> I40E_QRX_ENA_QENA_REQ_SHIFT) & 1) ==
3206                             ((rx_reg >> I40E_QRX_ENA_QENA_STAT_SHIFT) & 1))
3207                                 break;
3208                         usleep_range(1000, 2000);
3209                 }
3210
3211                 if (enable) {
3212                         /* is STAT set ? */
3213                         if ((rx_reg & I40E_QRX_ENA_QENA_STAT_MASK))
3214                                 continue;
3215                 } else {
3216                         /* is !STAT set ? */
3217                         if (!(rx_reg & I40E_QRX_ENA_QENA_STAT_MASK))
3218                                 continue;
3219                 }
3220
3221                 /* turn on/off the queue */
3222                 if (enable)
3223                         rx_reg |= I40E_QRX_ENA_QENA_REQ_MASK;
3224                 else
3225                         rx_reg &= ~I40E_QRX_ENA_QENA_REQ_MASK;
3226                 wr32(hw, I40E_QRX_ENA(pf_q), rx_reg);
3227
3228                 /* wait for the change to finish */
3229                 for (j = 0; j < 10; j++) {
3230                         rx_reg = rd32(hw, I40E_QRX_ENA(pf_q));
3231
3232                         if (enable) {
3233                                 if ((rx_reg & I40E_QRX_ENA_QENA_STAT_MASK))
3234                                         break;
3235                         } else {
3236                                 if (!(rx_reg & I40E_QRX_ENA_QENA_STAT_MASK))
3237                                         break;
3238                         }
3239
3240                         udelay(10);
3241                 }
3242                 if (j >= 10) {
3243                         dev_info(&pf->pdev->dev, "Rx ring %d %sable timeout\n",
3244                                  pf_q, (enable ? "en" : "dis"));
3245                         return -ETIMEDOUT;
3246                 }
3247         }
3248
3249         return 0;
3250 }
3251
3252 /**
3253  * i40e_vsi_control_rings - Start or stop a VSI's rings
3254  * @vsi: the VSI being configured
3255  * @enable: start or stop the rings
3256  **/
3257 int i40e_vsi_control_rings(struct i40e_vsi *vsi, bool request)
3258 {
3259         int ret = 0;
3260
3261         /* do rx first for enable and last for disable */
3262         if (request) {
3263                 ret = i40e_vsi_control_rx(vsi, request);
3264                 if (ret)
3265                         return ret;
3266                 ret = i40e_vsi_control_tx(vsi, request);
3267         } else {
3268                 /* Ignore return value, we need to shutdown whatever we can */
3269                 i40e_vsi_control_tx(vsi, request);
3270                 i40e_vsi_control_rx(vsi, request);
3271         }
3272
3273         return ret;
3274 }
3275
3276 /**
3277  * i40e_vsi_free_irq - Free the irq association with the OS
3278  * @vsi: the VSI being configured
3279  **/
3280 static void i40e_vsi_free_irq(struct i40e_vsi *vsi)
3281 {
3282         struct i40e_pf *pf = vsi->back;
3283         struct i40e_hw *hw = &pf->hw;
3284         int base = vsi->base_vector;
3285         u32 val, qp;
3286         int i;
3287
3288         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
3289                 if (!vsi->q_vectors)
3290                         return;
3291
3292                 for (i = 0; i < vsi->num_q_vectors; i++) {
3293                         u16 vector = i + base;
3294
3295                         /* free only the irqs that were actually requested */
3296                         if (!vsi->q_vectors[i] ||
3297                             !vsi->q_vectors[i]->num_ringpairs)
3298                                 continue;
3299
3300                         /* clear the affinity_mask in the IRQ descriptor */
3301                         irq_set_affinity_hint(pf->msix_entries[vector].vector,
3302                                               NULL);
3303                         free_irq(pf->msix_entries[vector].vector,
3304                                  vsi->q_vectors[i]);
3305
3306                         /* Tear down the interrupt queue link list
3307                          *
3308                          * We know that they come in pairs and always
3309                          * the Rx first, then the Tx.  To clear the
3310                          * link list, stick the EOL value into the
3311                          * next_q field of the registers.
3312                          */
3313                         val = rd32(hw, I40E_PFINT_LNKLSTN(vector - 1));
3314                         qp = (val & I40E_PFINT_LNKLSTN_FIRSTQ_INDX_MASK)
3315                                 >> I40E_PFINT_LNKLSTN_FIRSTQ_INDX_SHIFT;
3316                         val |= I40E_QUEUE_END_OF_LIST
3317                                 << I40E_PFINT_LNKLSTN_FIRSTQ_INDX_SHIFT;
3318                         wr32(hw, I40E_PFINT_LNKLSTN(vector - 1), val);
3319
3320                         while (qp != I40E_QUEUE_END_OF_LIST) {
3321                                 u32 next;
3322
3323                                 val = rd32(hw, I40E_QINT_RQCTL(qp));
3324
3325                                 val &= ~(I40E_QINT_RQCTL_MSIX_INDX_MASK  |
3326                                          I40E_QINT_RQCTL_MSIX0_INDX_MASK |
3327                                          I40E_QINT_RQCTL_CAUSE_ENA_MASK  |
3328                                          I40E_QINT_RQCTL_INTEVENT_MASK);
3329
3330                                 val |= (I40E_QINT_RQCTL_ITR_INDX_MASK |
3331                                          I40E_QINT_RQCTL_NEXTQ_INDX_MASK);
3332
3333                                 wr32(hw, I40E_QINT_RQCTL(qp), val);
3334
3335                                 val = rd32(hw, I40E_QINT_TQCTL(qp));
3336
3337                                 next = (val & I40E_QINT_TQCTL_NEXTQ_INDX_MASK)
3338                                         >> I40E_QINT_TQCTL_NEXTQ_INDX_SHIFT;
3339
3340                                 val &= ~(I40E_QINT_TQCTL_MSIX_INDX_MASK  |
3341                                          I40E_QINT_TQCTL_MSIX0_INDX_MASK |
3342                                          I40E_QINT_TQCTL_CAUSE_ENA_MASK  |
3343                                          I40E_QINT_TQCTL_INTEVENT_MASK);
3344
3345                                 val |= (I40E_QINT_TQCTL_ITR_INDX_MASK |
3346                                          I40E_QINT_TQCTL_NEXTQ_INDX_MASK);
3347
3348                                 wr32(hw, I40E_QINT_TQCTL(qp), val);
3349                                 qp = next;
3350                         }
3351                 }
3352         } else {
3353                 free_irq(pf->pdev->irq, pf);
3354
3355                 val = rd32(hw, I40E_PFINT_LNKLST0);
3356                 qp = (val & I40E_PFINT_LNKLSTN_FIRSTQ_INDX_MASK)
3357                         >> I40E_PFINT_LNKLSTN_FIRSTQ_INDX_SHIFT;
3358                 val |= I40E_QUEUE_END_OF_LIST
3359                         << I40E_PFINT_LNKLST0_FIRSTQ_INDX_SHIFT;
3360                 wr32(hw, I40E_PFINT_LNKLST0, val);
3361
3362                 val = rd32(hw, I40E_QINT_RQCTL(qp));
3363                 val &= ~(I40E_QINT_RQCTL_MSIX_INDX_MASK  |
3364                          I40E_QINT_RQCTL_MSIX0_INDX_MASK |
3365                          I40E_QINT_RQCTL_CAUSE_ENA_MASK  |
3366                          I40E_QINT_RQCTL_INTEVENT_MASK);
3367
3368                 val |= (I40E_QINT_RQCTL_ITR_INDX_MASK |
3369                         I40E_QINT_RQCTL_NEXTQ_INDX_MASK);
3370
3371                 wr32(hw, I40E_QINT_RQCTL(qp), val);
3372
3373                 val = rd32(hw, I40E_QINT_TQCTL(qp));
3374
3375                 val &= ~(I40E_QINT_TQCTL_MSIX_INDX_MASK  |
3376                          I40E_QINT_TQCTL_MSIX0_INDX_MASK |
3377                          I40E_QINT_TQCTL_CAUSE_ENA_MASK  |
3378                          I40E_QINT_TQCTL_INTEVENT_MASK);
3379
3380                 val |= (I40E_QINT_TQCTL_ITR_INDX_MASK |
3381                         I40E_QINT_TQCTL_NEXTQ_INDX_MASK);
3382
3383                 wr32(hw, I40E_QINT_TQCTL(qp), val);
3384         }
3385 }
3386
3387 /**
3388  * i40e_free_q_vector - Free memory allocated for specific interrupt vector
3389  * @vsi: the VSI being configured
3390  * @v_idx: Index of vector to be freed
3391  *
3392  * This function frees the memory allocated to the q_vector.  In addition if
3393  * NAPI is enabled it will delete any references to the NAPI struct prior
3394  * to freeing the q_vector.
3395  **/
3396 static void i40e_free_q_vector(struct i40e_vsi *vsi, int v_idx)
3397 {
3398         struct i40e_q_vector *q_vector = vsi->q_vectors[v_idx];
3399         struct i40e_ring *ring;
3400
3401         if (!q_vector)
3402                 return;
3403
3404         /* disassociate q_vector from rings */
3405         i40e_for_each_ring(ring, q_vector->tx)
3406                 ring->q_vector = NULL;
3407
3408         i40e_for_each_ring(ring, q_vector->rx)
3409                 ring->q_vector = NULL;
3410
3411         /* only VSI w/ an associated netdev is set up w/ NAPI */
3412         if (vsi->netdev)
3413                 netif_napi_del(&q_vector->napi);
3414
3415         vsi->q_vectors[v_idx] = NULL;
3416
3417         kfree_rcu(q_vector, rcu);
3418 }
3419
3420 /**
3421  * i40e_vsi_free_q_vectors - Free memory allocated for interrupt vectors
3422  * @vsi: the VSI being un-configured
3423  *
3424  * This frees the memory allocated to the q_vectors and
3425  * deletes references to the NAPI struct.
3426  **/
3427 static void i40e_vsi_free_q_vectors(struct i40e_vsi *vsi)
3428 {
3429         int v_idx;
3430
3431         for (v_idx = 0; v_idx < vsi->num_q_vectors; v_idx++)
3432                 i40e_free_q_vector(vsi, v_idx);
3433 }
3434
3435 /**
3436  * i40e_reset_interrupt_capability - Disable interrupt setup in OS
3437  * @pf: board private structure
3438  **/
3439 static void i40e_reset_interrupt_capability(struct i40e_pf *pf)
3440 {
3441         /* If we're in Legacy mode, the interrupt was cleaned in vsi_close */
3442         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
3443                 pci_disable_msix(pf->pdev);
3444                 kfree(pf->msix_entries);
3445                 pf->msix_entries = NULL;
3446         } else if (pf->flags & I40E_FLAG_MSI_ENABLED) {
3447                 pci_disable_msi(pf->pdev);
3448         }
3449         pf->flags &= ~(I40E_FLAG_MSIX_ENABLED | I40E_FLAG_MSI_ENABLED);
3450 }
3451
3452 /**
3453  * i40e_clear_interrupt_scheme - Clear the current interrupt scheme settings
3454  * @pf: board private structure
3455  *
3456  * We go through and clear interrupt specific resources and reset the structure
3457  * to pre-load conditions
3458  **/
3459 static void i40e_clear_interrupt_scheme(struct i40e_pf *pf)
3460 {
3461         int i;
3462
3463         i40e_put_lump(pf->irq_pile, 0, I40E_PILE_VALID_BIT-1);
3464         for (i = 0; i < pf->hw.func_caps.num_vsis; i++)
3465                 if (pf->vsi[i])
3466                         i40e_vsi_free_q_vectors(pf->vsi[i]);
3467         i40e_reset_interrupt_capability(pf);
3468 }
3469
3470 /**
3471  * i40e_napi_enable_all - Enable NAPI for all q_vectors in the VSI
3472  * @vsi: the VSI being configured
3473  **/
3474 static void i40e_napi_enable_all(struct i40e_vsi *vsi)
3475 {
3476         int q_idx;
3477
3478         if (!vsi->netdev)
3479                 return;
3480
3481         for (q_idx = 0; q_idx < vsi->num_q_vectors; q_idx++)
3482                 napi_enable(&vsi->q_vectors[q_idx]->napi);
3483 }
3484
3485 /**
3486  * i40e_napi_disable_all - Disable NAPI for all q_vectors in the VSI
3487  * @vsi: the VSI being configured
3488  **/
3489 static void i40e_napi_disable_all(struct i40e_vsi *vsi)
3490 {
3491         int q_idx;
3492
3493         if (!vsi->netdev)
3494                 return;
3495
3496         for (q_idx = 0; q_idx < vsi->num_q_vectors; q_idx++)
3497                 napi_disable(&vsi->q_vectors[q_idx]->napi);
3498 }
3499
3500 /**
3501  * i40e_quiesce_vsi - Pause a given VSI
3502  * @vsi: the VSI being paused
3503  **/
3504 static void i40e_quiesce_vsi(struct i40e_vsi *vsi)
3505 {
3506         if (test_bit(__I40E_DOWN, &vsi->state))
3507                 return;
3508
3509         set_bit(__I40E_NEEDS_RESTART, &vsi->state);
3510         if (vsi->netdev && netif_running(vsi->netdev)) {
3511                 vsi->netdev->netdev_ops->ndo_stop(vsi->netdev);
3512         } else {
3513                 set_bit(__I40E_DOWN, &vsi->state);
3514                 i40e_down(vsi);
3515         }
3516 }
3517
3518 /**
3519  * i40e_unquiesce_vsi - Resume a given VSI
3520  * @vsi: the VSI being resumed
3521  **/
3522 static void i40e_unquiesce_vsi(struct i40e_vsi *vsi)
3523 {
3524         if (!test_bit(__I40E_NEEDS_RESTART, &vsi->state))
3525                 return;
3526
3527         clear_bit(__I40E_NEEDS_RESTART, &vsi->state);
3528         if (vsi->netdev && netif_running(vsi->netdev))
3529                 vsi->netdev->netdev_ops->ndo_open(vsi->netdev);
3530         else
3531                 i40e_up(vsi);   /* this clears the DOWN bit */
3532 }
3533
3534 /**
3535  * i40e_pf_quiesce_all_vsi - Pause all VSIs on a PF
3536  * @pf: the PF
3537  **/
3538 static void i40e_pf_quiesce_all_vsi(struct i40e_pf *pf)
3539 {
3540         int v;
3541
3542         for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
3543                 if (pf->vsi[v])
3544                         i40e_quiesce_vsi(pf->vsi[v]);
3545         }
3546 }
3547
3548 /**
3549  * i40e_pf_unquiesce_all_vsi - Resume all VSIs on a PF
3550  * @pf: the PF
3551  **/
3552 static void i40e_pf_unquiesce_all_vsi(struct i40e_pf *pf)
3553 {
3554         int v;
3555
3556         for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
3557                 if (pf->vsi[v])
3558                         i40e_unquiesce_vsi(pf->vsi[v]);
3559         }
3560 }
3561
3562 /**
3563  * i40e_dcb_get_num_tc -  Get the number of TCs from DCBx config
3564  * @dcbcfg: the corresponding DCBx configuration structure
3565  *
3566  * Return the number of TCs from given DCBx configuration
3567  **/
3568 static u8 i40e_dcb_get_num_tc(struct i40e_dcbx_config *dcbcfg)
3569 {
3570         u8 num_tc = 0;
3571         int i;
3572
3573         /* Scan the ETS Config Priority Table to find
3574          * traffic class enabled for a given priority
3575          * and use the traffic class index to get the
3576          * number of traffic classes enabled
3577          */
3578         for (i = 0; i < I40E_MAX_USER_PRIORITY; i++) {
3579                 if (dcbcfg->etscfg.prioritytable[i] > num_tc)
3580                         num_tc = dcbcfg->etscfg.prioritytable[i];
3581         }
3582
3583         /* Traffic class index starts from zero so
3584          * increment to return the actual count
3585          */
3586         return num_tc + 1;
3587 }
3588
3589 /**
3590  * i40e_dcb_get_enabled_tc - Get enabled traffic classes
3591  * @dcbcfg: the corresponding DCBx configuration structure
3592  *
3593  * Query the current DCB configuration and return the number of
3594  * traffic classes enabled from the given DCBX config
3595  **/
3596 static u8 i40e_dcb_get_enabled_tc(struct i40e_dcbx_config *dcbcfg)
3597 {
3598         u8 num_tc = i40e_dcb_get_num_tc(dcbcfg);
3599         u8 enabled_tc = 1;
3600         u8 i;
3601
3602         for (i = 0; i < num_tc; i++)
3603                 enabled_tc |= 1 << i;
3604
3605         return enabled_tc;
3606 }
3607
3608 /**
3609  * i40e_pf_get_num_tc - Get enabled traffic classes for PF
3610  * @pf: PF being queried
3611  *
3612  * Return number of traffic classes enabled for the given PF
3613  **/
3614 static u8 i40e_pf_get_num_tc(struct i40e_pf *pf)
3615 {
3616         struct i40e_hw *hw = &pf->hw;
3617         u8 i, enabled_tc;
3618         u8 num_tc = 0;
3619         struct i40e_dcbx_config *dcbcfg = &hw->local_dcbx_config;
3620
3621         /* If DCB is not enabled then always in single TC */
3622         if (!(pf->flags & I40E_FLAG_DCB_ENABLED))
3623                 return 1;
3624
3625         /* MFP mode return count of enabled TCs for this PF */
3626         if (pf->flags & I40E_FLAG_MFP_ENABLED) {
3627                 enabled_tc = pf->hw.func_caps.enabled_tcmap;
3628                 for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
3629                         if (enabled_tc & (1 << i))
3630                                 num_tc++;
3631                 }
3632                 return num_tc;
3633         }
3634
3635         /* SFP mode will be enabled for all TCs on port */
3636         return i40e_dcb_get_num_tc(dcbcfg);
3637 }
3638
3639 /**
3640  * i40e_pf_get_default_tc - Get bitmap for first enabled TC
3641  * @pf: PF being queried
3642  *
3643  * Return a bitmap for first enabled traffic class for this PF.
3644  **/
3645 static u8 i40e_pf_get_default_tc(struct i40e_pf *pf)
3646 {
3647         u8 enabled_tc = pf->hw.func_caps.enabled_tcmap;
3648         u8 i = 0;
3649
3650         if (!enabled_tc)
3651                 return 0x1; /* TC0 */
3652
3653         /* Find the first enabled TC */
3654         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
3655                 if (enabled_tc & (1 << i))
3656                         break;
3657         }
3658
3659         return 1 << i;
3660 }
3661
3662 /**
3663  * i40e_pf_get_pf_tc_map - Get bitmap for enabled traffic classes
3664  * @pf: PF being queried
3665  *
3666  * Return a bitmap for enabled traffic classes for this PF.
3667  **/
3668 static u8 i40e_pf_get_tc_map(struct i40e_pf *pf)
3669 {
3670         /* If DCB is not enabled for this PF then just return default TC */
3671         if (!(pf->flags & I40E_FLAG_DCB_ENABLED))
3672                 return i40e_pf_get_default_tc(pf);
3673
3674         /* MFP mode will have enabled TCs set by FW */
3675         if (pf->flags & I40E_FLAG_MFP_ENABLED)
3676                 return pf->hw.func_caps.enabled_tcmap;
3677
3678         /* SFP mode we want PF to be enabled for all TCs */
3679         return i40e_dcb_get_enabled_tc(&pf->hw.local_dcbx_config);
3680 }
3681
3682 /**
3683  * i40e_vsi_get_bw_info - Query VSI BW Information
3684  * @vsi: the VSI being queried
3685  *
3686  * Returns 0 on success, negative value on failure
3687  **/
3688 static int i40e_vsi_get_bw_info(struct i40e_vsi *vsi)
3689 {
3690         struct i40e_aqc_query_vsi_ets_sla_config_resp bw_ets_config = {0};
3691         struct i40e_aqc_query_vsi_bw_config_resp bw_config = {0};
3692         struct i40e_pf *pf = vsi->back;
3693         struct i40e_hw *hw = &pf->hw;
3694         i40e_status aq_ret;
3695         u32 tc_bw_max;
3696         int i;
3697
3698         /* Get the VSI level BW configuration */
3699         aq_ret = i40e_aq_query_vsi_bw_config(hw, vsi->seid, &bw_config, NULL);
3700         if (aq_ret) {
3701                 dev_info(&pf->pdev->dev,
3702                          "couldn't get pf vsi bw config, err %d, aq_err %d\n",
3703                          aq_ret, pf->hw.aq.asq_last_status);
3704                 return -EINVAL;
3705         }
3706
3707         /* Get the VSI level BW configuration per TC */
3708         aq_ret = i40e_aq_query_vsi_ets_sla_config(hw, vsi->seid, &bw_ets_config,
3709                                                   NULL);
3710         if (aq_ret) {
3711                 dev_info(&pf->pdev->dev,
3712                          "couldn't get pf vsi ets bw config, err %d, aq_err %d\n",
3713                          aq_ret, pf->hw.aq.asq_last_status);
3714                 return -EINVAL;
3715         }
3716
3717         if (bw_config.tc_valid_bits != bw_ets_config.tc_valid_bits) {
3718                 dev_info(&pf->pdev->dev,
3719                          "Enabled TCs mismatch from querying VSI BW info 0x%08x 0x%08x\n",
3720                          bw_config.tc_valid_bits,
3721                          bw_ets_config.tc_valid_bits);
3722                 /* Still continuing */
3723         }
3724
3725         vsi->bw_limit = le16_to_cpu(bw_config.port_bw_limit);
3726         vsi->bw_max_quanta = bw_config.max_bw;
3727         tc_bw_max = le16_to_cpu(bw_ets_config.tc_bw_max[0]) |
3728                     (le16_to_cpu(bw_ets_config.tc_bw_max[1]) << 16);
3729         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
3730                 vsi->bw_ets_share_credits[i] = bw_ets_config.share_credits[i];
3731                 vsi->bw_ets_limit_credits[i] =
3732                                         le16_to_cpu(bw_ets_config.credits[i]);
3733                 /* 3 bits out of 4 for each TC */
3734                 vsi->bw_ets_max_quanta[i] = (u8)((tc_bw_max >> (i*4)) & 0x7);
3735         }
3736
3737         return 0;
3738 }
3739
3740 /**
3741  * i40e_vsi_configure_bw_alloc - Configure VSI BW allocation per TC
3742  * @vsi: the VSI being configured
3743  * @enabled_tc: TC bitmap
3744  * @bw_credits: BW shared credits per TC
3745  *
3746  * Returns 0 on success, negative value on failure
3747  **/
3748 static int i40e_vsi_configure_bw_alloc(struct i40e_vsi *vsi, u8 enabled_tc,
3749                                        u8 *bw_share)
3750 {
3751         struct i40e_aqc_configure_vsi_tc_bw_data bw_data;
3752         i40e_status aq_ret;
3753         int i;
3754
3755         bw_data.tc_valid_bits = enabled_tc;
3756         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++)
3757                 bw_data.tc_bw_credits[i] = bw_share[i];
3758
3759         aq_ret = i40e_aq_config_vsi_tc_bw(&vsi->back->hw, vsi->seid, &bw_data,
3760                                           NULL);
3761         if (aq_ret) {
3762                 dev_info(&vsi->back->pdev->dev,
3763                          "AQ command Config VSI BW allocation per TC failed = %d\n",
3764                          vsi->back->hw.aq.asq_last_status);
3765                 return -EINVAL;
3766         }
3767
3768         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++)
3769                 vsi->info.qs_handle[i] = bw_data.qs_handles[i];
3770
3771         return 0;
3772 }
3773
3774 /**
3775  * i40e_vsi_config_netdev_tc - Setup the netdev TC configuration
3776  * @vsi: the VSI being configured
3777  * @enabled_tc: TC map to be enabled
3778  *
3779  **/
3780 static void i40e_vsi_config_netdev_tc(struct i40e_vsi *vsi, u8 enabled_tc)
3781 {
3782         struct net_device *netdev = vsi->netdev;
3783         struct i40e_pf *pf = vsi->back;
3784         struct i40e_hw *hw = &pf->hw;
3785         u8 netdev_tc = 0;
3786         int i;
3787         struct i40e_dcbx_config *dcbcfg = &hw->local_dcbx_config;
3788
3789         if (!netdev)
3790                 return;
3791
3792         if (!enabled_tc) {
3793                 netdev_reset_tc(netdev);
3794                 return;
3795         }
3796
3797         /* Set up actual enabled TCs on the VSI */
3798         if (netdev_set_num_tc(netdev, vsi->tc_config.numtc))
3799                 return;
3800
3801         /* set per TC queues for the VSI */
3802         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
3803                 /* Only set TC queues for enabled tcs
3804                  *
3805                  * e.g. For a VSI that has TC0 and TC3 enabled the
3806                  * enabled_tc bitmap would be 0x00001001; the driver
3807                  * will set the numtc for netdev as 2 that will be
3808                  * referenced by the netdev layer as TC 0 and 1.
3809                  */
3810                 if (vsi->tc_config.enabled_tc & (1 << i))
3811                         netdev_set_tc_queue(netdev,
3812                                         vsi->tc_config.tc_info[i].netdev_tc,
3813                                         vsi->tc_config.tc_info[i].qcount,
3814                                         vsi->tc_config.tc_info[i].qoffset);
3815         }
3816
3817         /* Assign UP2TC map for the VSI */
3818         for (i = 0; i < I40E_MAX_USER_PRIORITY; i++) {
3819                 /* Get the actual TC# for the UP */
3820                 u8 ets_tc = dcbcfg->etscfg.prioritytable[i];
3821                 /* Get the mapped netdev TC# for the UP */
3822                 netdev_tc =  vsi->tc_config.tc_info[ets_tc].netdev_tc;
3823                 netdev_set_prio_tc_map(netdev, i, netdev_tc);
3824         }
3825 }
3826
3827 /**
3828  * i40e_vsi_update_queue_map - Update our copy of VSi info with new queue map
3829  * @vsi: the VSI being configured
3830  * @ctxt: the ctxt buffer returned from AQ VSI update param command
3831  **/
3832 static void i40e_vsi_update_queue_map(struct i40e_vsi *vsi,
3833                                       struct i40e_vsi_context *ctxt)
3834 {
3835         /* copy just the sections touched not the entire info
3836          * since not all sections are valid as returned by
3837          * update vsi params
3838          */
3839         vsi->info.mapping_flags = ctxt->info.mapping_flags;
3840         memcpy(&vsi->info.queue_mapping,
3841                &ctxt->info.queue_mapping, sizeof(vsi->info.queue_mapping));
3842         memcpy(&vsi->info.tc_mapping, ctxt->info.tc_mapping,
3843                sizeof(vsi->info.tc_mapping));
3844 }
3845
3846 /**
3847  * i40e_vsi_config_tc - Configure VSI Tx Scheduler for given TC map
3848  * @vsi: VSI to be configured
3849  * @enabled_tc: TC bitmap
3850  *
3851  * This configures a particular VSI for TCs that are mapped to the
3852  * given TC bitmap. It uses default bandwidth share for TCs across
3853  * VSIs to configure TC for a particular VSI.
3854  *
3855  * NOTE:
3856  * It is expected that the VSI queues have been quisced before calling
3857  * this function.
3858  **/
3859 static int i40e_vsi_config_tc(struct i40e_vsi *vsi, u8 enabled_tc)
3860 {
3861         u8 bw_share[I40E_MAX_TRAFFIC_CLASS] = {0};
3862         struct i40e_vsi_context ctxt;
3863         int ret = 0;
3864         int i;
3865
3866         /* Check if enabled_tc is same as existing or new TCs */
3867         if (vsi->tc_config.enabled_tc == enabled_tc)
3868                 return ret;
3869
3870         /* Enable ETS TCs with equal BW Share for now across all VSIs */
3871         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
3872                 if (enabled_tc & (1 << i))
3873                         bw_share[i] = 1;
3874         }
3875
3876         ret = i40e_vsi_configure_bw_alloc(vsi, enabled_tc, bw_share);
3877         if (ret) {
3878                 dev_info(&vsi->back->pdev->dev,
3879                          "Failed configuring TC map %d for VSI %d\n",
3880                          enabled_tc, vsi->seid);
3881                 goto out;
3882         }
3883
3884         /* Update Queue Pairs Mapping for currently enabled UPs */
3885         ctxt.seid = vsi->seid;
3886         ctxt.pf_num = vsi->back->hw.pf_id;
3887         ctxt.vf_num = 0;
3888         ctxt.uplink_seid = vsi->uplink_seid;
3889         memcpy(&ctxt.info, &vsi->info, sizeof(vsi->info));
3890         i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, false);
3891
3892         /* Update the VSI after updating the VSI queue-mapping information */
3893         ret = i40e_aq_update_vsi_params(&vsi->back->hw, &ctxt, NULL);
3894         if (ret) {
3895                 dev_info(&vsi->back->pdev->dev,
3896                          "update vsi failed, aq_err=%d\n",
3897                          vsi->back->hw.aq.asq_last_status);
3898                 goto out;
3899         }
3900         /* update the local VSI info with updated queue map */
3901         i40e_vsi_update_queue_map(vsi, &ctxt);
3902         vsi->info.valid_sections = 0;
3903
3904         /* Update current VSI BW information */
3905         ret = i40e_vsi_get_bw_info(vsi);
3906         if (ret) {
3907                 dev_info(&vsi->back->pdev->dev,
3908                          "Failed updating vsi bw info, aq_err=%d\n",
3909                          vsi->back->hw.aq.asq_last_status);
3910                 goto out;
3911         }
3912
3913         /* Update the netdev TC setup */
3914         i40e_vsi_config_netdev_tc(vsi, enabled_tc);
3915 out:
3916         return ret;
3917 }
3918
3919 /**
3920  * i40e_veb_config_tc - Configure TCs for given VEB
3921  * @veb: given VEB
3922  * @enabled_tc: TC bitmap
3923  *
3924  * Configures given TC bitmap for VEB (switching) element
3925  **/
3926 int i40e_veb_config_tc(struct i40e_veb *veb, u8 enabled_tc)
3927 {
3928         struct i40e_aqc_configure_switching_comp_bw_config_data bw_data = {0};
3929         struct i40e_pf *pf = veb->pf;
3930         int ret = 0;
3931         int i;
3932
3933         /* No TCs or already enabled TCs just return */
3934         if (!enabled_tc || veb->enabled_tc == enabled_tc)
3935                 return ret;
3936
3937         bw_data.tc_valid_bits = enabled_tc;
3938         /* bw_data.absolute_credits is not set (relative) */
3939
3940         /* Enable ETS TCs with equal BW Share for now */
3941         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
3942                 if (enabled_tc & (1 << i))
3943                         bw_data.tc_bw_share_credits[i] = 1;
3944         }
3945
3946         ret = i40e_aq_config_switch_comp_bw_config(&pf->hw, veb->seid,
3947                                                    &bw_data, NULL);
3948         if (ret) {
3949                 dev_info(&pf->pdev->dev,
3950                          "veb bw config failed, aq_err=%d\n",
3951                          pf->hw.aq.asq_last_status);
3952                 goto out;
3953         }
3954
3955         /* Update the BW information */
3956         ret = i40e_veb_get_bw_info(veb);
3957         if (ret) {
3958                 dev_info(&pf->pdev->dev,
3959                          "Failed getting veb bw config, aq_err=%d\n",
3960                          pf->hw.aq.asq_last_status);
3961         }
3962
3963 out:
3964         return ret;
3965 }
3966
3967 #ifdef CONFIG_I40E_DCB
3968 /**
3969  * i40e_dcb_reconfigure - Reconfigure all VEBs and VSIs
3970  * @pf: PF struct
3971  *
3972  * Reconfigure VEB/VSIs on a given PF; it is assumed that
3973  * the caller would've quiesce all the VSIs before calling
3974  * this function
3975  **/
3976 static void i40e_dcb_reconfigure(struct i40e_pf *pf)
3977 {
3978         u8 tc_map = 0;
3979         int ret;
3980         u8 v;
3981
3982         /* Enable the TCs available on PF to all VEBs */
3983         tc_map = i40e_pf_get_tc_map(pf);
3984         for (v = 0; v < I40E_MAX_VEB; v++) {
3985                 if (!pf->veb[v])
3986                         continue;
3987                 ret = i40e_veb_config_tc(pf->veb[v], tc_map);
3988                 if (ret) {
3989                         dev_info(&pf->pdev->dev,
3990                                  "Failed configuring TC for VEB seid=%d\n",
3991                                  pf->veb[v]->seid);
3992                         /* Will try to configure as many components */
3993                 }
3994         }
3995
3996         /* Update each VSI */
3997         for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
3998                 if (!pf->vsi[v])
3999                         continue;
4000
4001                 /* - Enable all TCs for the LAN VSI
4002                  * - For all others keep them at TC0 for now
4003                  */
4004                 if (v == pf->lan_vsi)
4005                         tc_map = i40e_pf_get_tc_map(pf);
4006                 else
4007                         tc_map = i40e_pf_get_default_tc(pf);
4008
4009                 ret = i40e_vsi_config_tc(pf->vsi[v], tc_map);
4010                 if (ret) {
4011                         dev_info(&pf->pdev->dev,
4012                                  "Failed configuring TC for VSI seid=%d\n",
4013                                  pf->vsi[v]->seid);
4014                         /* Will try to configure as many components */
4015                 } else {
4016                         if (pf->vsi[v]->netdev)
4017                                 i40e_dcbnl_set_all(pf->vsi[v]);
4018                 }
4019         }
4020 }
4021
4022 /**
4023  * i40e_init_pf_dcb - Initialize DCB configuration
4024  * @pf: PF being configured
4025  *
4026  * Query the current DCB configuration and cache it
4027  * in the hardware structure
4028  **/
4029 static int i40e_init_pf_dcb(struct i40e_pf *pf)
4030 {
4031         struct i40e_hw *hw = &pf->hw;
4032         int err = 0;
4033
4034         if (pf->hw.func_caps.npar_enable)
4035                 goto out;
4036
4037         /* Get the initial DCB configuration */
4038         err = i40e_init_dcb(hw);
4039         if (!err) {
4040                 /* Device/Function is not DCBX capable */
4041                 if ((!hw->func_caps.dcb) ||
4042                     (hw->dcbx_status == I40E_DCBX_STATUS_DISABLED)) {
4043                         dev_info(&pf->pdev->dev,
4044                                  "DCBX offload is not supported or is disabled for this PF.\n");
4045
4046                         if (pf->flags & I40E_FLAG_MFP_ENABLED)
4047                                 goto out;
4048
4049                 } else {
4050                         /* When status is not DISABLED then DCBX in FW */
4051                         pf->dcbx_cap = DCB_CAP_DCBX_LLD_MANAGED |
4052                                        DCB_CAP_DCBX_VER_IEEE;
4053                         pf->flags |= I40E_FLAG_DCB_ENABLED;
4054                 }
4055         }
4056
4057 out:
4058         return err;
4059 }
4060 #endif /* CONFIG_I40E_DCB */
4061
4062 /**
4063  * i40e_up_complete - Finish the last steps of bringing up a connection
4064  * @vsi: the VSI being configured
4065  **/
4066 static int i40e_up_complete(struct i40e_vsi *vsi)
4067 {
4068         struct i40e_pf *pf = vsi->back;
4069         int err;
4070
4071         if (pf->flags & I40E_FLAG_MSIX_ENABLED)
4072                 i40e_vsi_configure_msix(vsi);
4073         else
4074                 i40e_configure_msi_and_legacy(vsi);
4075
4076         /* start rings */
4077         err = i40e_vsi_control_rings(vsi, true);
4078         if (err)
4079                 return err;
4080
4081         clear_bit(__I40E_DOWN, &vsi->state);
4082         i40e_napi_enable_all(vsi);
4083         i40e_vsi_enable_irq(vsi);
4084
4085         if ((pf->hw.phy.link_info.link_info & I40E_AQ_LINK_UP) &&
4086             (vsi->netdev)) {
4087                 netdev_info(vsi->netdev, "NIC Link is Up\n");
4088                 netif_tx_start_all_queues(vsi->netdev);
4089                 netif_carrier_on(vsi->netdev);
4090         } else if (vsi->netdev) {
4091                 netdev_info(vsi->netdev, "NIC Link is Down\n");
4092         }
4093
4094         /* replay FDIR SB filters */
4095         if (vsi->type == I40E_VSI_FDIR)
4096                 i40e_fdir_filter_restore(vsi);
4097         i40e_service_event_schedule(pf);
4098
4099         return 0;
4100 }
4101
4102 /**
4103  * i40e_vsi_reinit_locked - Reset the VSI
4104  * @vsi: the VSI being configured
4105  *
4106  * Rebuild the ring structs after some configuration
4107  * has changed, e.g. MTU size.
4108  **/
4109 static void i40e_vsi_reinit_locked(struct i40e_vsi *vsi)
4110 {
4111         struct i40e_pf *pf = vsi->back;
4112
4113         WARN_ON(in_interrupt());
4114         while (test_and_set_bit(__I40E_CONFIG_BUSY, &pf->state))
4115                 usleep_range(1000, 2000);
4116         i40e_down(vsi);
4117
4118         /* Give a VF some time to respond to the reset.  The
4119          * two second wait is based upon the watchdog cycle in
4120          * the VF driver.
4121          */
4122         if (vsi->type == I40E_VSI_SRIOV)
4123                 msleep(2000);
4124         i40e_up(vsi);
4125         clear_bit(__I40E_CONFIG_BUSY, &pf->state);
4126 }
4127
4128 /**
4129  * i40e_up - Bring the connection back up after being down
4130  * @vsi: the VSI being configured
4131  **/
4132 int i40e_up(struct i40e_vsi *vsi)
4133 {
4134         int err;
4135
4136         err = i40e_vsi_configure(vsi);
4137         if (!err)
4138                 err = i40e_up_complete(vsi);
4139
4140         return err;
4141 }
4142
4143 /**
4144  * i40e_down - Shutdown the connection processing
4145  * @vsi: the VSI being stopped
4146  **/
4147 void i40e_down(struct i40e_vsi *vsi)
4148 {
4149         int i;
4150
4151         /* It is assumed that the caller of this function
4152          * sets the vsi->state __I40E_DOWN bit.
4153          */
4154         if (vsi->netdev) {
4155                 netif_carrier_off(vsi->netdev);
4156                 netif_tx_disable(vsi->netdev);
4157         }
4158         i40e_vsi_disable_irq(vsi);
4159         i40e_vsi_control_rings(vsi, false);
4160         i40e_napi_disable_all(vsi);
4161
4162         for (i = 0; i < vsi->num_queue_pairs; i++) {
4163                 i40e_clean_tx_ring(vsi->tx_rings[i]);
4164                 i40e_clean_rx_ring(vsi->rx_rings[i]);
4165         }
4166 }
4167
4168 /**
4169  * i40e_setup_tc - configure multiple traffic classes
4170  * @netdev: net device to configure
4171  * @tc: number of traffic classes to enable
4172  **/
4173 static int i40e_setup_tc(struct net_device *netdev, u8 tc)
4174 {
4175         struct i40e_netdev_priv *np = netdev_priv(netdev);
4176         struct i40e_vsi *vsi = np->vsi;
4177         struct i40e_pf *pf = vsi->back;
4178         u8 enabled_tc = 0;
4179         int ret = -EINVAL;
4180         int i;
4181
4182         /* Check if DCB enabled to continue */
4183         if (!(pf->flags & I40E_FLAG_DCB_ENABLED)) {
4184                 netdev_info(netdev, "DCB is not enabled for adapter\n");
4185                 goto exit;
4186         }
4187
4188         /* Check if MFP enabled */
4189         if (pf->flags & I40E_FLAG_MFP_ENABLED) {
4190                 netdev_info(netdev, "Configuring TC not supported in MFP mode\n");
4191                 goto exit;
4192         }
4193
4194         /* Check whether tc count is within enabled limit */
4195         if (tc > i40e_pf_get_num_tc(pf)) {
4196                 netdev_info(netdev, "TC count greater than enabled on link for adapter\n");
4197                 goto exit;
4198         }
4199
4200         /* Generate TC map for number of tc requested */
4201         for (i = 0; i < tc; i++)
4202                 enabled_tc |= (1 << i);
4203
4204         /* Requesting same TC configuration as already enabled */
4205         if (enabled_tc == vsi->tc_config.enabled_tc)
4206                 return 0;
4207
4208         /* Quiesce VSI queues */
4209         i40e_quiesce_vsi(vsi);
4210
4211         /* Configure VSI for enabled TCs */
4212         ret = i40e_vsi_config_tc(vsi, enabled_tc);
4213         if (ret) {
4214                 netdev_info(netdev, "Failed configuring TC for VSI seid=%d\n",
4215                             vsi->seid);
4216                 goto exit;
4217         }
4218
4219         /* Unquiesce VSI */
4220         i40e_unquiesce_vsi(vsi);
4221
4222 exit:
4223         return ret;
4224 }
4225
4226 /**
4227  * i40e_open - Called when a network interface is made active
4228  * @netdev: network interface device structure
4229  *
4230  * The open entry point is called when a network interface is made
4231  * active by the system (IFF_UP).  At this point all resources needed
4232  * for transmit and receive operations are allocated, the interrupt
4233  * handler is registered with the OS, the netdev watchdog subtask is
4234  * enabled, and the stack is notified that the interface is ready.
4235  *
4236  * Returns 0 on success, negative value on failure
4237  **/
4238 static int i40e_open(struct net_device *netdev)
4239 {
4240         struct i40e_netdev_priv *np = netdev_priv(netdev);
4241         struct i40e_vsi *vsi = np->vsi;
4242         struct i40e_pf *pf = vsi->back;
4243         int err;
4244
4245         /* disallow open during test */
4246         if (test_bit(__I40E_TESTING, &pf->state))
4247                 return -EBUSY;
4248
4249         netif_carrier_off(netdev);
4250
4251         err = i40e_vsi_open(vsi);
4252         if (err)
4253                 return err;
4254
4255 #ifdef CONFIG_I40E_VXLAN
4256         vxlan_get_rx_port(netdev);
4257 #endif
4258
4259         return 0;
4260 }
4261
4262 /**
4263  * i40e_vsi_open -
4264  * @vsi: the VSI to open
4265  *
4266  * Finish initialization of the VSI.
4267  *
4268  * Returns 0 on success, negative value on failure
4269  **/
4270 int i40e_vsi_open(struct i40e_vsi *vsi)
4271 {
4272         struct i40e_pf *pf = vsi->back;
4273         char int_name[IFNAMSIZ];
4274         int err;
4275
4276         /* allocate descriptors */
4277         err = i40e_vsi_setup_tx_resources(vsi);
4278         if (err)
4279                 goto err_setup_tx;
4280         err = i40e_vsi_setup_rx_resources(vsi);
4281         if (err)
4282                 goto err_setup_rx;
4283
4284         err = i40e_vsi_configure(vsi);
4285         if (err)
4286                 goto err_setup_rx;
4287
4288         if (!vsi->netdev) {
4289                 err = EINVAL;
4290                 goto err_setup_rx;
4291         }
4292         snprintf(int_name, sizeof(int_name) - 1, "%s-%s",
4293                  dev_driver_string(&pf->pdev->dev), vsi->netdev->name);
4294         err = i40e_vsi_request_irq(vsi, int_name);
4295         if (err)
4296                 goto err_setup_rx;
4297
4298         /* Notify the stack of the actual queue counts. */
4299         err = netif_set_real_num_tx_queues(vsi->netdev, vsi->num_queue_pairs);
4300         if (err)
4301                 goto err_set_queues;
4302
4303         err = netif_set_real_num_rx_queues(vsi->netdev, vsi->num_queue_pairs);
4304         if (err)
4305                 goto err_set_queues;
4306
4307         err = i40e_up_complete(vsi);
4308         if (err)
4309                 goto err_up_complete;
4310
4311         return 0;
4312
4313 err_up_complete:
4314         i40e_down(vsi);
4315 err_set_queues:
4316         i40e_vsi_free_irq(vsi);
4317 err_setup_rx:
4318         i40e_vsi_free_rx_resources(vsi);
4319 err_setup_tx:
4320         i40e_vsi_free_tx_resources(vsi);
4321         if (vsi == pf->vsi[pf->lan_vsi])
4322                 i40e_do_reset(pf, (1 << __I40E_PF_RESET_REQUESTED));
4323
4324         return err;
4325 }
4326
4327 /**
4328  * i40e_fdir_filter_exit - Cleans up the Flow Director accounting
4329  * @pf: Pointer to pf
4330  *
4331  * This function destroys the hlist where all the Flow Director
4332  * filters were saved.
4333  **/
4334 static void i40e_fdir_filter_exit(struct i40e_pf *pf)
4335 {
4336         struct i40e_fdir_filter *filter;
4337         struct hlist_node *node2;
4338
4339         hlist_for_each_entry_safe(filter, node2,
4340                                   &pf->fdir_filter_list, fdir_node) {
4341                 hlist_del(&filter->fdir_node);
4342                 kfree(filter);
4343         }
4344         pf->fdir_pf_active_filters = 0;
4345 }
4346
4347 /**
4348  * i40e_close - Disables a network interface
4349  * @netdev: network interface device structure
4350  *
4351  * The close entry point is called when an interface is de-activated
4352  * by the OS.  The hardware is still under the driver's control, but
4353  * this netdev interface is disabled.
4354  *
4355  * Returns 0, this is not allowed to fail
4356  **/
4357 static int i40e_close(struct net_device *netdev)
4358 {
4359         struct i40e_netdev_priv *np = netdev_priv(netdev);
4360         struct i40e_vsi *vsi = np->vsi;
4361
4362         if (test_and_set_bit(__I40E_DOWN, &vsi->state))
4363                 return 0;
4364
4365         i40e_down(vsi);
4366         i40e_vsi_free_irq(vsi);
4367
4368         i40e_vsi_free_tx_resources(vsi);
4369         i40e_vsi_free_rx_resources(vsi);
4370
4371         return 0;
4372 }
4373
4374 /**
4375  * i40e_do_reset - Start a PF or Core Reset sequence
4376  * @pf: board private structure
4377  * @reset_flags: which reset is requested
4378  *
4379  * The essential difference in resets is that the PF Reset
4380  * doesn't clear the packet buffers, doesn't reset the PE
4381  * firmware, and doesn't bother the other PFs on the chip.
4382  **/
4383 void i40e_do_reset(struct i40e_pf *pf, u32 reset_flags)
4384 {
4385         u32 val;
4386
4387         WARN_ON(in_interrupt());
4388
4389         /* do the biggest reset indicated */
4390         if (reset_flags & (1 << __I40E_GLOBAL_RESET_REQUESTED)) {
4391
4392                 /* Request a Global Reset
4393                  *
4394                  * This will start the chip's countdown to the actual full
4395                  * chip reset event, and a warning interrupt to be sent
4396                  * to all PFs, including the requestor.  Our handler
4397                  * for the warning interrupt will deal with the shutdown
4398                  * and recovery of the switch setup.
4399                  */
4400                 dev_dbg(&pf->pdev->dev, "GlobalR requested\n");
4401                 val = rd32(&pf->hw, I40E_GLGEN_RTRIG);
4402                 val |= I40E_GLGEN_RTRIG_GLOBR_MASK;
4403                 wr32(&pf->hw, I40E_GLGEN_RTRIG, val);
4404
4405         } else if (reset_flags & (1 << __I40E_CORE_RESET_REQUESTED)) {
4406
4407                 /* Request a Core Reset
4408                  *
4409                  * Same as Global Reset, except does *not* include the MAC/PHY
4410                  */
4411                 dev_dbg(&pf->pdev->dev, "CoreR requested\n");
4412                 val = rd32(&pf->hw, I40E_GLGEN_RTRIG);
4413                 val |= I40E_GLGEN_RTRIG_CORER_MASK;
4414                 wr32(&pf->hw, I40E_GLGEN_RTRIG, val);
4415                 i40e_flush(&pf->hw);
4416
4417         } else if (reset_flags & (1 << __I40E_EMP_RESET_REQUESTED)) {
4418
4419                 /* Request a Firmware Reset
4420                  *
4421                  * Same as Global reset, plus restarting the
4422                  * embedded firmware engine.
4423                  */
4424                 /* enable EMP Reset */
4425                 val = rd32(&pf->hw, I40E_GLGEN_RSTENA_EMP);
4426                 val |= I40E_GLGEN_RSTENA_EMP_EMP_RST_ENA_MASK;
4427                 wr32(&pf->hw, I40E_GLGEN_RSTENA_EMP, val);
4428
4429                 /* force the reset */
4430                 val = rd32(&pf->hw, I40E_GLGEN_RTRIG);
4431                 val |= I40E_GLGEN_RTRIG_EMPFWR_MASK;
4432                 wr32(&pf->hw, I40E_GLGEN_RTRIG, val);
4433                 i40e_flush(&pf->hw);
4434
4435         } else if (reset_flags & (1 << __I40E_PF_RESET_REQUESTED)) {
4436
4437                 /* Request a PF Reset
4438                  *
4439                  * Resets only the PF-specific registers
4440                  *
4441                  * This goes directly to the tear-down and rebuild of
4442                  * the switch, since we need to do all the recovery as
4443                  * for the Core Reset.
4444                  */
4445                 dev_dbg(&pf->pdev->dev, "PFR requested\n");
4446                 i40e_handle_reset_warning(pf);
4447
4448         } else if (reset_flags & (1 << __I40E_REINIT_REQUESTED)) {
4449                 int v;
4450
4451                 /* Find the VSI(s) that requested a re-init */
4452                 dev_info(&pf->pdev->dev,
4453                          "VSI reinit requested\n");
4454                 for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
4455                         struct i40e_vsi *vsi = pf->vsi[v];
4456                         if (vsi != NULL &&
4457                             test_bit(__I40E_REINIT_REQUESTED, &vsi->state)) {
4458                                 i40e_vsi_reinit_locked(pf->vsi[v]);
4459                                 clear_bit(__I40E_REINIT_REQUESTED, &vsi->state);
4460                         }
4461                 }
4462
4463                 /* no further action needed, so return now */
4464                 return;
4465         } else {
4466                 dev_info(&pf->pdev->dev,
4467                          "bad reset request 0x%08x\n", reset_flags);
4468                 return;
4469         }
4470 }
4471
4472 #ifdef CONFIG_I40E_DCB
4473 /**
4474  * i40e_dcb_need_reconfig - Check if DCB needs reconfig
4475  * @pf: board private structure
4476  * @old_cfg: current DCB config
4477  * @new_cfg: new DCB config
4478  **/
4479 bool i40e_dcb_need_reconfig(struct i40e_pf *pf,
4480                             struct i40e_dcbx_config *old_cfg,
4481                             struct i40e_dcbx_config *new_cfg)
4482 {
4483         bool need_reconfig = false;
4484
4485         /* Check if ETS configuration has changed */
4486         if (memcmp(&new_cfg->etscfg,
4487                    &old_cfg->etscfg,
4488                    sizeof(new_cfg->etscfg))) {
4489                 /* If Priority Table has changed reconfig is needed */
4490                 if (memcmp(&new_cfg->etscfg.prioritytable,
4491                            &old_cfg->etscfg.prioritytable,
4492                            sizeof(new_cfg->etscfg.prioritytable))) {
4493                         need_reconfig = true;
4494                         dev_dbg(&pf->pdev->dev, "ETS UP2TC changed.\n");
4495                 }
4496
4497                 if (memcmp(&new_cfg->etscfg.tcbwtable,
4498                            &old_cfg->etscfg.tcbwtable,
4499                            sizeof(new_cfg->etscfg.tcbwtable)))
4500                         dev_dbg(&pf->pdev->dev, "ETS TC BW Table changed.\n");
4501
4502                 if (memcmp(&new_cfg->etscfg.tsatable,
4503                            &old_cfg->etscfg.tsatable,
4504                            sizeof(new_cfg->etscfg.tsatable)))
4505                         dev_dbg(&pf->pdev->dev, "ETS TSA Table changed.\n");
4506         }
4507
4508         /* Check if PFC configuration has changed */
4509         if (memcmp(&new_cfg->pfc,
4510                    &old_cfg->pfc,
4511                    sizeof(new_cfg->pfc))) {
4512                 need_reconfig = true;
4513                 dev_dbg(&pf->pdev->dev, "PFC config change detected.\n");
4514         }
4515
4516         /* Check if APP Table has changed */
4517         if (memcmp(&new_cfg->app,
4518                    &old_cfg->app,
4519                    sizeof(new_cfg->app))) {
4520                 need_reconfig = true;
4521                 dev_dbg(&pf->pdev->dev, "APP Table change detected.\n");
4522         }
4523
4524         return need_reconfig;
4525 }
4526
4527 /**
4528  * i40e_handle_lldp_event - Handle LLDP Change MIB event
4529  * @pf: board private structure
4530  * @e: event info posted on ARQ
4531  **/
4532 static int i40e_handle_lldp_event(struct i40e_pf *pf,
4533                                   struct i40e_arq_event_info *e)
4534 {
4535         struct i40e_aqc_lldp_get_mib *mib =
4536                 (struct i40e_aqc_lldp_get_mib *)&e->desc.params.raw;
4537         struct i40e_hw *hw = &pf->hw;
4538         struct i40e_dcbx_config *dcbx_cfg = &hw->local_dcbx_config;
4539         struct i40e_dcbx_config tmp_dcbx_cfg;
4540         bool need_reconfig = false;
4541         int ret = 0;
4542         u8 type;
4543
4544         /* Ignore if event is not for Nearest Bridge */
4545         type = ((mib->type >> I40E_AQ_LLDP_BRIDGE_TYPE_SHIFT)
4546                 & I40E_AQ_LLDP_BRIDGE_TYPE_MASK);
4547         if (type != I40E_AQ_LLDP_BRIDGE_TYPE_NEAREST_BRIDGE)
4548                 return ret;
4549
4550         /* Check MIB Type and return if event for Remote MIB update */
4551         type = mib->type & I40E_AQ_LLDP_MIB_TYPE_MASK;
4552         if (type == I40E_AQ_LLDP_MIB_REMOTE) {
4553                 /* Update the remote cached instance and return */
4554                 ret = i40e_aq_get_dcb_config(hw, I40E_AQ_LLDP_MIB_REMOTE,
4555                                 I40E_AQ_LLDP_BRIDGE_TYPE_NEAREST_BRIDGE,
4556                                 &hw->remote_dcbx_config);
4557                 goto exit;
4558         }
4559
4560         /* Convert/store the DCBX data from LLDPDU temporarily */
4561         memset(&tmp_dcbx_cfg, 0, sizeof(tmp_dcbx_cfg));
4562         ret = i40e_lldp_to_dcb_config(e->msg_buf, &tmp_dcbx_cfg);
4563         if (ret) {
4564                 /* Error in LLDPDU parsing return */
4565                 dev_info(&pf->pdev->dev, "Failed parsing LLDPDU from event buffer\n");
4566                 goto exit;
4567         }
4568
4569         /* No change detected in DCBX configs */
4570         if (!memcmp(&tmp_dcbx_cfg, dcbx_cfg, sizeof(tmp_dcbx_cfg))) {
4571                 dev_dbg(&pf->pdev->dev, "No change detected in DCBX configuration.\n");
4572                 goto exit;
4573         }
4574
4575         need_reconfig = i40e_dcb_need_reconfig(pf, dcbx_cfg, &tmp_dcbx_cfg);
4576
4577         i40e_dcbnl_flush_apps(pf, &tmp_dcbx_cfg);
4578
4579         /* Overwrite the new configuration */
4580         *dcbx_cfg = tmp_dcbx_cfg;
4581
4582         if (!need_reconfig)
4583                 goto exit;
4584
4585         /* Reconfiguration needed quiesce all VSIs */
4586         i40e_pf_quiesce_all_vsi(pf);
4587
4588         /* Changes in configuration update VEB/VSI */
4589         i40e_dcb_reconfigure(pf);
4590
4591         i40e_pf_unquiesce_all_vsi(pf);
4592 exit:
4593         return ret;
4594 }
4595 #endif /* CONFIG_I40E_DCB */
4596
4597 /**
4598  * i40e_do_reset_safe - Protected reset path for userland calls.
4599  * @pf: board private structure
4600  * @reset_flags: which reset is requested
4601  *
4602  **/
4603 void i40e_do_reset_safe(struct i40e_pf *pf, u32 reset_flags)
4604 {
4605         rtnl_lock();
4606         i40e_do_reset(pf, reset_flags);
4607         rtnl_unlock();
4608 }
4609
4610 /**
4611  * i40e_handle_lan_overflow_event - Handler for LAN queue overflow event
4612  * @pf: board private structure
4613  * @e: event info posted on ARQ
4614  *
4615  * Handler for LAN Queue Overflow Event generated by the firmware for PF
4616  * and VF queues
4617  **/
4618 static void i40e_handle_lan_overflow_event(struct i40e_pf *pf,
4619                                            struct i40e_arq_event_info *e)
4620 {
4621         struct i40e_aqc_lan_overflow *data =
4622                 (struct i40e_aqc_lan_overflow *)&e->desc.params.raw;
4623         u32 queue = le32_to_cpu(data->prtdcb_rupto);
4624         u32 qtx_ctl = le32_to_cpu(data->otx_ctl);
4625         struct i40e_hw *hw = &pf->hw;
4626         struct i40e_vf *vf;
4627         u16 vf_id;
4628
4629         dev_dbg(&pf->pdev->dev, "overflow Rx Queue Number = %d QTX_CTL=0x%08x\n",
4630                 queue, qtx_ctl);
4631
4632         /* Queue belongs to VF, find the VF and issue VF reset */
4633         if (((qtx_ctl & I40E_QTX_CTL_PFVF_Q_MASK)
4634             >> I40E_QTX_CTL_PFVF_Q_SHIFT) == I40E_QTX_CTL_VF_QUEUE) {
4635                 vf_id = (u16)((qtx_ctl & I40E_QTX_CTL_VFVM_INDX_MASK)
4636                          >> I40E_QTX_CTL_VFVM_INDX_SHIFT);
4637                 vf_id -= hw->func_caps.vf_base_id;
4638                 vf = &pf->vf[vf_id];
4639                 i40e_vc_notify_vf_reset(vf);
4640                 /* Allow VF to process pending reset notification */
4641                 msleep(20);
4642                 i40e_reset_vf(vf, false);
4643         }
4644 }
4645
4646 /**
4647  * i40e_service_event_complete - Finish up the service event
4648  * @pf: board private structure
4649  **/
4650 static void i40e_service_event_complete(struct i40e_pf *pf)
4651 {
4652         BUG_ON(!test_bit(__I40E_SERVICE_SCHED, &pf->state));
4653
4654         /* flush memory to make sure state is correct before next watchog */
4655         smp_mb__before_clear_bit();
4656         clear_bit(__I40E_SERVICE_SCHED, &pf->state);
4657 }
4658
4659 /**
4660  * i40e_get_current_fd_count - Get the count of FD filters programmed in the HW
4661  * @pf: board private structure
4662  **/
4663 int i40e_get_current_fd_count(struct i40e_pf *pf)
4664 {
4665         int val, fcnt_prog;
4666         val = rd32(&pf->hw, I40E_PFQF_FDSTAT);
4667         fcnt_prog = (val & I40E_PFQF_FDSTAT_GUARANT_CNT_MASK) +
4668                     ((val & I40E_PFQF_FDSTAT_BEST_CNT_MASK) >>
4669                       I40E_PFQF_FDSTAT_BEST_CNT_SHIFT);
4670         return fcnt_prog;
4671 }
4672
4673 /**
4674  * i40e_fdir_check_and_reenable - Function to reenabe FD ATR or SB if disabled
4675  * @pf: board private structure
4676  **/
4677 void i40e_fdir_check_and_reenable(struct i40e_pf *pf)
4678 {
4679         u32 fcnt_prog, fcnt_avail;
4680
4681         /* Check if, FD SB or ATR was auto disabled and if there is enough room
4682          * to re-enable
4683          */
4684         if ((pf->flags & I40E_FLAG_FD_ATR_ENABLED) &&
4685             (pf->flags & I40E_FLAG_FD_SB_ENABLED))
4686                 return;
4687         fcnt_prog = i40e_get_current_fd_count(pf);
4688         fcnt_avail = pf->hw.fdir_shared_filter_count +
4689                                                pf->fdir_pf_filter_count;
4690         if (fcnt_prog < (fcnt_avail - I40E_FDIR_BUFFER_HEAD_ROOM)) {
4691                 if ((pf->flags & I40E_FLAG_FD_SB_ENABLED) &&
4692                     (pf->auto_disable_flags & I40E_FLAG_FD_SB_ENABLED)) {
4693                         pf->auto_disable_flags &= ~I40E_FLAG_FD_SB_ENABLED;
4694                         dev_info(&pf->pdev->dev, "FD Sideband/ntuple is being enabled since we have space in the table now\n");
4695                 }
4696         }
4697         /* Wait for some more space to be available to turn on ATR */
4698         if (fcnt_prog < (fcnt_avail - I40E_FDIR_BUFFER_HEAD_ROOM * 2)) {
4699                 if ((pf->flags & I40E_FLAG_FD_ATR_ENABLED) &&
4700                     (pf->auto_disable_flags & I40E_FLAG_FD_ATR_ENABLED)) {
4701                         pf->auto_disable_flags &= ~I40E_FLAG_FD_ATR_ENABLED;
4702                         dev_info(&pf->pdev->dev, "ATR is being enabled since we have space in the table now\n");
4703                 }
4704         }
4705 }
4706
4707 /**
4708  * i40e_fdir_reinit_subtask - Worker thread to reinit FDIR filter table
4709  * @pf: board private structure
4710  **/
4711 static void i40e_fdir_reinit_subtask(struct i40e_pf *pf)
4712 {
4713         if (!(pf->flags & I40E_FLAG_FDIR_REQUIRES_REINIT))
4714                 return;
4715
4716         /* if interface is down do nothing */
4717         if (test_bit(__I40E_DOWN, &pf->state))
4718                 return;
4719         i40e_fdir_check_and_reenable(pf);
4720
4721         if ((pf->flags & I40E_FLAG_FD_ATR_ENABLED) &&
4722             (pf->flags & I40E_FLAG_FD_SB_ENABLED))
4723                 pf->flags &= ~I40E_FLAG_FDIR_REQUIRES_REINIT;
4724 }
4725
4726 /**
4727  * i40e_vsi_link_event - notify VSI of a link event
4728  * @vsi: vsi to be notified
4729  * @link_up: link up or down
4730  **/
4731 static void i40e_vsi_link_event(struct i40e_vsi *vsi, bool link_up)
4732 {
4733         if (!vsi)
4734                 return;
4735
4736         switch (vsi->type) {
4737         case I40E_VSI_MAIN:
4738                 if (!vsi->netdev || !vsi->netdev_registered)
4739                         break;
4740
4741                 if (link_up) {
4742                         netif_carrier_on(vsi->netdev);
4743                         netif_tx_wake_all_queues(vsi->netdev);
4744                 } else {
4745                         netif_carrier_off(vsi->netdev);
4746                         netif_tx_stop_all_queues(vsi->netdev);
4747                 }
4748                 break;
4749
4750         case I40E_VSI_SRIOV:
4751                 break;
4752
4753         case I40E_VSI_VMDQ2:
4754         case I40E_VSI_CTRL:
4755         case I40E_VSI_MIRROR:
4756         default:
4757                 /* there is no notification for other VSIs */
4758                 break;
4759         }
4760 }
4761
4762 /**
4763  * i40e_veb_link_event - notify elements on the veb of a link event
4764  * @veb: veb to be notified
4765  * @link_up: link up or down
4766  **/
4767 static void i40e_veb_link_event(struct i40e_veb *veb, bool link_up)
4768 {
4769         struct i40e_pf *pf;
4770         int i;
4771
4772         if (!veb || !veb->pf)
4773                 return;
4774         pf = veb->pf;
4775
4776         /* depth first... */
4777         for (i = 0; i < I40E_MAX_VEB; i++)
4778                 if (pf->veb[i] && (pf->veb[i]->uplink_seid == veb->seid))
4779                         i40e_veb_link_event(pf->veb[i], link_up);
4780
4781         /* ... now the local VSIs */
4782         for (i = 0; i < pf->hw.func_caps.num_vsis; i++)
4783                 if (pf->vsi[i] && (pf->vsi[i]->uplink_seid == veb->seid))
4784                         i40e_vsi_link_event(pf->vsi[i], link_up);
4785 }
4786
4787 /**
4788  * i40e_link_event - Update netif_carrier status
4789  * @pf: board private structure
4790  **/
4791 static void i40e_link_event(struct i40e_pf *pf)
4792 {
4793         bool new_link, old_link;
4794
4795         new_link = (pf->hw.phy.link_info.link_info & I40E_AQ_LINK_UP);
4796         old_link = (pf->hw.phy.link_info_old.link_info & I40E_AQ_LINK_UP);
4797
4798         if (new_link == old_link)
4799                 return;
4800
4801         if (!test_bit(__I40E_DOWN, &pf->vsi[pf->lan_vsi]->state))
4802                 netdev_info(pf->vsi[pf->lan_vsi]->netdev,
4803                             "NIC Link is %s\n", (new_link ? "Up" : "Down"));
4804
4805         /* Notify the base of the switch tree connected to
4806          * the link.  Floating VEBs are not notified.
4807          */
4808         if (pf->lan_veb != I40E_NO_VEB && pf->veb[pf->lan_veb])
4809                 i40e_veb_link_event(pf->veb[pf->lan_veb], new_link);
4810         else
4811                 i40e_vsi_link_event(pf->vsi[pf->lan_vsi], new_link);
4812
4813         if (pf->vf)
4814                 i40e_vc_notify_link_state(pf);
4815
4816         if (pf->flags & I40E_FLAG_PTP)
4817                 i40e_ptp_set_increment(pf);
4818 }
4819
4820 /**
4821  * i40e_check_hang_subtask - Check for hung queues and dropped interrupts
4822  * @pf: board private structure
4823  *
4824  * Set the per-queue flags to request a check for stuck queues in the irq
4825  * clean functions, then force interrupts to be sure the irq clean is called.
4826  **/
4827 static void i40e_check_hang_subtask(struct i40e_pf *pf)
4828 {
4829         int i, v;
4830
4831         /* If we're down or resetting, just bail */
4832         if (test_bit(__I40E_CONFIG_BUSY, &pf->state))
4833                 return;
4834
4835         /* for each VSI/netdev
4836          *     for each Tx queue
4837          *         set the check flag
4838          *     for each q_vector
4839          *         force an interrupt
4840          */
4841         for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
4842                 struct i40e_vsi *vsi = pf->vsi[v];
4843                 int armed = 0;
4844
4845                 if (!pf->vsi[v] ||
4846                     test_bit(__I40E_DOWN, &vsi->state) ||
4847                     (vsi->netdev && !netif_carrier_ok(vsi->netdev)))
4848                         continue;
4849
4850                 for (i = 0; i < vsi->num_queue_pairs; i++) {
4851                         set_check_for_tx_hang(vsi->tx_rings[i]);
4852                         if (test_bit(__I40E_HANG_CHECK_ARMED,
4853                                      &vsi->tx_rings[i]->state))
4854                                 armed++;
4855                 }
4856
4857                 if (armed) {
4858                         if (!(pf->flags & I40E_FLAG_MSIX_ENABLED)) {
4859                                 wr32(&vsi->back->hw, I40E_PFINT_DYN_CTL0,
4860                                      (I40E_PFINT_DYN_CTL0_INTENA_MASK |
4861                                       I40E_PFINT_DYN_CTL0_SWINT_TRIG_MASK));
4862                         } else {
4863                                 u16 vec = vsi->base_vector - 1;
4864                                 u32 val = (I40E_PFINT_DYN_CTLN_INTENA_MASK |
4865                                            I40E_PFINT_DYN_CTLN_SWINT_TRIG_MASK);
4866                                 for (i = 0; i < vsi->num_q_vectors; i++, vec++)
4867                                         wr32(&vsi->back->hw,
4868                                              I40E_PFINT_DYN_CTLN(vec), val);
4869                         }
4870                         i40e_flush(&vsi->back->hw);
4871                 }
4872         }
4873 }
4874
4875 /**
4876  * i40e_watchdog_subtask - Check and bring link up
4877  * @pf: board private structure
4878  **/
4879 static void i40e_watchdog_subtask(struct i40e_pf *pf)
4880 {
4881         int i;
4882
4883         /* if interface is down do nothing */
4884         if (test_bit(__I40E_DOWN, &pf->state) ||
4885             test_bit(__I40E_CONFIG_BUSY, &pf->state))
4886                 return;
4887
4888         /* Update the stats for active netdevs so the network stack
4889          * can look at updated numbers whenever it cares to
4890          */
4891         for (i = 0; i < pf->hw.func_caps.num_vsis; i++)
4892                 if (pf->vsi[i] && pf->vsi[i]->netdev)
4893                         i40e_update_stats(pf->vsi[i]);
4894
4895         /* Update the stats for the active switching components */
4896         for (i = 0; i < I40E_MAX_VEB; i++)
4897                 if (pf->veb[i])
4898                         i40e_update_veb_stats(pf->veb[i]);
4899
4900         i40e_ptp_rx_hang(pf->vsi[pf->lan_vsi]);
4901 }
4902
4903 /**
4904  * i40e_reset_subtask - Set up for resetting the device and driver
4905  * @pf: board private structure
4906  **/
4907 static void i40e_reset_subtask(struct i40e_pf *pf)
4908 {
4909         u32 reset_flags = 0;
4910
4911         rtnl_lock();
4912         if (test_bit(__I40E_REINIT_REQUESTED, &pf->state)) {
4913                 reset_flags |= (1 << __I40E_REINIT_REQUESTED);
4914                 clear_bit(__I40E_REINIT_REQUESTED, &pf->state);
4915         }
4916         if (test_bit(__I40E_PF_RESET_REQUESTED, &pf->state)) {
4917                 reset_flags |= (1 << __I40E_PF_RESET_REQUESTED);
4918                 clear_bit(__I40E_PF_RESET_REQUESTED, &pf->state);
4919         }
4920         if (test_bit(__I40E_CORE_RESET_REQUESTED, &pf->state)) {
4921                 reset_flags |= (1 << __I40E_CORE_RESET_REQUESTED);
4922                 clear_bit(__I40E_CORE_RESET_REQUESTED, &pf->state);
4923         }
4924         if (test_bit(__I40E_GLOBAL_RESET_REQUESTED, &pf->state)) {
4925                 reset_flags |= (1 << __I40E_GLOBAL_RESET_REQUESTED);
4926                 clear_bit(__I40E_GLOBAL_RESET_REQUESTED, &pf->state);
4927         }
4928
4929         /* If there's a recovery already waiting, it takes
4930          * precedence before starting a new reset sequence.
4931          */
4932         if (test_bit(__I40E_RESET_INTR_RECEIVED, &pf->state)) {
4933                 i40e_handle_reset_warning(pf);
4934                 goto unlock;
4935         }
4936
4937         /* If we're already down or resetting, just bail */
4938         if (reset_flags &&
4939             !test_bit(__I40E_DOWN, &pf->state) &&
4940             !test_bit(__I40E_CONFIG_BUSY, &pf->state))
4941                 i40e_do_reset(pf, reset_flags);
4942
4943 unlock:
4944         rtnl_unlock();
4945 }
4946
4947 /**
4948  * i40e_handle_link_event - Handle link event
4949  * @pf: board private structure
4950  * @e: event info posted on ARQ
4951  **/
4952 static void i40e_handle_link_event(struct i40e_pf *pf,
4953                                    struct i40e_arq_event_info *e)
4954 {
4955         struct i40e_hw *hw = &pf->hw;
4956         struct i40e_aqc_get_link_status *status =
4957                 (struct i40e_aqc_get_link_status *)&e->desc.params.raw;
4958         struct i40e_link_status *hw_link_info = &hw->phy.link_info;
4959
4960         /* save off old link status information */
4961         memcpy(&pf->hw.phy.link_info_old, hw_link_info,
4962                sizeof(pf->hw.phy.link_info_old));
4963
4964         /* update link status */
4965         hw_link_info->phy_type = (enum i40e_aq_phy_type)status->phy_type;
4966         hw_link_info->link_speed = (enum i40e_aq_link_speed)status->link_speed;
4967         hw_link_info->link_info = status->link_info;
4968         hw_link_info->an_info = status->an_info;
4969         hw_link_info->ext_info = status->ext_info;
4970         hw_link_info->lse_enable =
4971                 le16_to_cpu(status->command_flags) &
4972                             I40E_AQ_LSE_ENABLE;
4973
4974         /* process the event */
4975         i40e_link_event(pf);
4976
4977         /* Do a new status request to re-enable LSE reporting
4978          * and load new status information into the hw struct,
4979          * then see if the status changed while processing the
4980          * initial event.
4981          */
4982         i40e_aq_get_link_info(&pf->hw, true, NULL, NULL);
4983         i40e_link_event(pf);
4984 }
4985
4986 /**
4987  * i40e_clean_adminq_subtask - Clean the AdminQ rings
4988  * @pf: board private structure
4989  **/
4990 static void i40e_clean_adminq_subtask(struct i40e_pf *pf)
4991 {
4992         struct i40e_arq_event_info event;
4993         struct i40e_hw *hw = &pf->hw;
4994         u16 pending, i = 0;
4995         i40e_status ret;
4996         u16 opcode;
4997         u32 val;
4998
4999         if (!test_bit(__I40E_ADMINQ_EVENT_PENDING, &pf->state))
5000                 return;
5001
5002         event.msg_size = I40E_MAX_AQ_BUF_SIZE;
5003         event.msg_buf = kzalloc(event.msg_size, GFP_KERNEL);
5004         if (!event.msg_buf)
5005                 return;
5006
5007         do {
5008                 event.msg_size = I40E_MAX_AQ_BUF_SIZE; /* reinit each time */
5009                 ret = i40e_clean_arq_element(hw, &event, &pending);
5010                 if (ret == I40E_ERR_ADMIN_QUEUE_NO_WORK) {
5011                         dev_info(&pf->pdev->dev, "No ARQ event found\n");
5012                         break;
5013                 } else if (ret) {
5014                         dev_info(&pf->pdev->dev, "ARQ event error %d\n", ret);
5015                         break;
5016                 }
5017
5018                 opcode = le16_to_cpu(event.desc.opcode);
5019                 switch (opcode) {
5020
5021                 case i40e_aqc_opc_get_link_status:
5022                         i40e_handle_link_event(pf, &event);
5023                         break;
5024                 case i40e_aqc_opc_send_msg_to_pf:
5025                         ret = i40e_vc_process_vf_msg(pf,
5026                                         le16_to_cpu(event.desc.retval),
5027                                         le32_to_cpu(event.desc.cookie_high),
5028                                         le32_to_cpu(event.desc.cookie_low),
5029                                         event.msg_buf,
5030                                         event.msg_size);
5031                         break;
5032                 case i40e_aqc_opc_lldp_update_mib:
5033                         dev_dbg(&pf->pdev->dev, "ARQ: Update LLDP MIB event received\n");
5034 #ifdef CONFIG_I40E_DCB
5035                         rtnl_lock();
5036                         ret = i40e_handle_lldp_event(pf, &event);
5037                         rtnl_unlock();
5038 #endif /* CONFIG_I40E_DCB */
5039                         break;
5040                 case i40e_aqc_opc_event_lan_overflow:
5041                         dev_dbg(&pf->pdev->dev, "ARQ LAN queue overflow event received\n");
5042                         i40e_handle_lan_overflow_event(pf, &event);
5043                         break;
5044                 case i40e_aqc_opc_send_msg_to_peer:
5045                         dev_info(&pf->pdev->dev, "ARQ: Msg from other pf\n");
5046                         break;
5047                 default:
5048                         dev_info(&pf->pdev->dev,
5049                                  "ARQ Error: Unknown event 0x%04x received\n",
5050                                  opcode);
5051                         break;
5052                 }
5053         } while (pending && (i++ < pf->adminq_work_limit));
5054
5055         clear_bit(__I40E_ADMINQ_EVENT_PENDING, &pf->state);
5056         /* re-enable Admin queue interrupt cause */
5057         val = rd32(hw, I40E_PFINT_ICR0_ENA);
5058         val |=  I40E_PFINT_ICR0_ENA_ADMINQ_MASK;
5059         wr32(hw, I40E_PFINT_ICR0_ENA, val);
5060         i40e_flush(hw);
5061
5062         kfree(event.msg_buf);
5063 }
5064
5065 /**
5066  * i40e_reconstitute_veb - rebuild the VEB and anything connected to it
5067  * @veb: pointer to the VEB instance
5068  *
5069  * This is a recursive function that first builds the attached VSIs then
5070  * recurses in to build the next layer of VEB.  We track the connections
5071  * through our own index numbers because the seid's from the HW could
5072  * change across the reset.
5073  **/
5074 static int i40e_reconstitute_veb(struct i40e_veb *veb)
5075 {
5076         struct i40e_vsi *ctl_vsi = NULL;
5077         struct i40e_pf *pf = veb->pf;
5078         int v, veb_idx;
5079         int ret;
5080
5081         /* build VSI that owns this VEB, temporarily attached to base VEB */
5082         for (v = 0; v < pf->hw.func_caps.num_vsis && !ctl_vsi; v++) {
5083                 if (pf->vsi[v] &&
5084                     pf->vsi[v]->veb_idx == veb->idx &&
5085                     pf->vsi[v]->flags & I40E_VSI_FLAG_VEB_OWNER) {
5086                         ctl_vsi = pf->vsi[v];
5087                         break;
5088                 }
5089         }
5090         if (!ctl_vsi) {
5091                 dev_info(&pf->pdev->dev,
5092                          "missing owner VSI for veb_idx %d\n", veb->idx);
5093                 ret = -ENOENT;
5094                 goto end_reconstitute;
5095         }
5096         if (ctl_vsi != pf->vsi[pf->lan_vsi])
5097                 ctl_vsi->uplink_seid = pf->vsi[pf->lan_vsi]->uplink_seid;
5098         ret = i40e_add_vsi(ctl_vsi);
5099         if (ret) {
5100                 dev_info(&pf->pdev->dev,
5101                          "rebuild of owner VSI failed: %d\n", ret);
5102                 goto end_reconstitute;
5103         }
5104         i40e_vsi_reset_stats(ctl_vsi);
5105
5106         /* create the VEB in the switch and move the VSI onto the VEB */
5107         ret = i40e_add_veb(veb, ctl_vsi);
5108         if (ret)
5109                 goto end_reconstitute;
5110
5111         /* create the remaining VSIs attached to this VEB */
5112         for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
5113                 if (!pf->vsi[v] || pf->vsi[v] == ctl_vsi)
5114                         continue;
5115
5116                 if (pf->vsi[v]->veb_idx == veb->idx) {
5117                         struct i40e_vsi *vsi = pf->vsi[v];
5118                         vsi->uplink_seid = veb->seid;
5119                         ret = i40e_add_vsi(vsi);
5120                         if (ret) {
5121                                 dev_info(&pf->pdev->dev,
5122                                          "rebuild of vsi_idx %d failed: %d\n",
5123                                          v, ret);
5124                                 goto end_reconstitute;
5125                         }
5126                         i40e_vsi_reset_stats(vsi);
5127                 }
5128         }
5129
5130         /* create any VEBs attached to this VEB - RECURSION */
5131         for (veb_idx = 0; veb_idx < I40E_MAX_VEB; veb_idx++) {
5132                 if (pf->veb[veb_idx] && pf->veb[veb_idx]->veb_idx == veb->idx) {
5133                         pf->veb[veb_idx]->uplink_seid = veb->seid;
5134                         ret = i40e_reconstitute_veb(pf->veb[veb_idx]);
5135                         if (ret)
5136                                 break;
5137                 }
5138         }
5139
5140 end_reconstitute:
5141         return ret;
5142 }
5143
5144 /**
5145  * i40e_get_capabilities - get info about the HW
5146  * @pf: the PF struct
5147  **/
5148 static int i40e_get_capabilities(struct i40e_pf *pf)
5149 {
5150         struct i40e_aqc_list_capabilities_element_resp *cap_buf;
5151         u16 data_size;
5152         int buf_len;
5153         int err;
5154
5155         buf_len = 40 * sizeof(struct i40e_aqc_list_capabilities_element_resp);
5156         do {
5157                 cap_buf = kzalloc(buf_len, GFP_KERNEL);
5158                 if (!cap_buf)
5159                         return -ENOMEM;
5160
5161                 /* this loads the data into the hw struct for us */
5162                 err = i40e_aq_discover_capabilities(&pf->hw, cap_buf, buf_len,
5163                                             &data_size,
5164                                             i40e_aqc_opc_list_func_capabilities,
5165                                             NULL);
5166                 /* data loaded, buffer no longer needed */
5167                 kfree(cap_buf);
5168
5169                 if (pf->hw.aq.asq_last_status == I40E_AQ_RC_ENOMEM) {
5170                         /* retry with a larger buffer */
5171                         buf_len = data_size;
5172                 } else if (pf->hw.aq.asq_last_status != I40E_AQ_RC_OK) {
5173                         dev_info(&pf->pdev->dev,
5174                                  "capability discovery failed: aq=%d\n",
5175                                  pf->hw.aq.asq_last_status);
5176                         return -ENODEV;
5177                 }
5178         } while (err);
5179
5180         /* increment MSI-X count because current FW skips one */
5181         pf->hw.func_caps.num_msix_vectors++;
5182
5183         if (((pf->hw.aq.fw_maj_ver == 2) && (pf->hw.aq.fw_min_ver < 22)) ||
5184             (pf->hw.aq.fw_maj_ver < 2)) {
5185                 pf->hw.func_caps.num_msix_vectors++;
5186                 pf->hw.func_caps.num_msix_vectors_vf++;
5187         }
5188
5189         if (pf->hw.debug_mask & I40E_DEBUG_USER)
5190                 dev_info(&pf->pdev->dev,
5191                          "pf=%d, num_vfs=%d, msix_pf=%d, msix_vf=%d, fd_g=%d, fd_b=%d, pf_max_q=%d num_vsi=%d\n",
5192                          pf->hw.pf_id, pf->hw.func_caps.num_vfs,
5193                          pf->hw.func_caps.num_msix_vectors,
5194                          pf->hw.func_caps.num_msix_vectors_vf,
5195                          pf->hw.func_caps.fd_filters_guaranteed,
5196                          pf->hw.func_caps.fd_filters_best_effort,
5197                          pf->hw.func_caps.num_tx_qp,
5198                          pf->hw.func_caps.num_vsis);
5199
5200 #define DEF_NUM_VSI (1 + (pf->hw.func_caps.fcoe ? 1 : 0) \
5201                        + pf->hw.func_caps.num_vfs)
5202         if (pf->hw.revision_id == 0 && (DEF_NUM_VSI > pf->hw.func_caps.num_vsis)) {
5203                 dev_info(&pf->pdev->dev,
5204                          "got num_vsis %d, setting num_vsis to %d\n",
5205                          pf->hw.func_caps.num_vsis, DEF_NUM_VSI);
5206                 pf->hw.func_caps.num_vsis = DEF_NUM_VSI;
5207         }
5208
5209         return 0;
5210 }
5211
5212 static int i40e_vsi_clear(struct i40e_vsi *vsi);
5213
5214 /**
5215  * i40e_fdir_sb_setup - initialize the Flow Director resources for Sideband
5216  * @pf: board private structure
5217  **/
5218 static void i40e_fdir_sb_setup(struct i40e_pf *pf)
5219 {
5220         struct i40e_vsi *vsi;
5221         bool new_vsi = false;
5222         int err, i;
5223
5224         if (!(pf->flags & I40E_FLAG_FD_SB_ENABLED))
5225                 return;
5226
5227         /* find existing VSI and see if it needs configuring */
5228         vsi = NULL;
5229         for (i = 0; i < pf->hw.func_caps.num_vsis; i++) {
5230                 if (pf->vsi[i] && pf->vsi[i]->type == I40E_VSI_FDIR) {
5231                         vsi = pf->vsi[i];
5232                         break;
5233                 }
5234         }
5235
5236         /* create a new VSI if none exists */
5237         if (!vsi) {
5238                 vsi = i40e_vsi_setup(pf, I40E_VSI_FDIR,
5239                                      pf->vsi[pf->lan_vsi]->seid, 0);
5240                 if (!vsi) {
5241                         dev_info(&pf->pdev->dev, "Couldn't create FDir VSI\n");
5242                         goto err_vsi;
5243                 }
5244                 new_vsi = true;
5245         }
5246         i40e_vsi_setup_irqhandler(vsi, i40e_fdir_clean_ring);
5247
5248         err = i40e_vsi_setup_tx_resources(vsi);
5249         if (err)
5250                 goto err_setup_tx;
5251         err = i40e_vsi_setup_rx_resources(vsi);
5252         if (err)
5253                 goto err_setup_rx;
5254
5255         if (new_vsi) {
5256                 char int_name[IFNAMSIZ + 9];
5257                 err = i40e_vsi_configure(vsi);
5258                 if (err)
5259                         goto err_setup_rx;
5260                 snprintf(int_name, sizeof(int_name) - 1, "%s-fdir",
5261                          dev_driver_string(&pf->pdev->dev));
5262                 err = i40e_vsi_request_irq(vsi, int_name);
5263                 if (err)
5264                         goto err_setup_rx;
5265                 err = i40e_up_complete(vsi);
5266                 if (err)
5267                         goto err_up_complete;
5268                 clear_bit(__I40E_NEEDS_RESTART, &vsi->state);
5269         }
5270
5271         return;
5272
5273 err_up_complete:
5274         i40e_down(vsi);
5275         i40e_vsi_free_irq(vsi);
5276 err_setup_rx:
5277         i40e_vsi_free_rx_resources(vsi);
5278 err_setup_tx:
5279         i40e_vsi_free_tx_resources(vsi);
5280 err_vsi:
5281         pf->flags &= ~I40E_FLAG_FD_SB_ENABLED;
5282         i40e_vsi_clear(vsi);
5283 }
5284
5285 /**
5286  * i40e_fdir_teardown - release the Flow Director resources
5287  * @pf: board private structure
5288  **/
5289 static void i40e_fdir_teardown(struct i40e_pf *pf)
5290 {
5291         int i;
5292
5293         i40e_fdir_filter_exit(pf);
5294         for (i = 0; i < pf->hw.func_caps.num_vsis; i++) {
5295                 if (pf->vsi[i] && pf->vsi[i]->type == I40E_VSI_FDIR) {
5296                         i40e_vsi_release(pf->vsi[i]);
5297                         break;
5298                 }
5299         }
5300 }
5301
5302 /**
5303  * i40e_prep_for_reset - prep for the core to reset
5304  * @pf: board private structure
5305  *
5306  * Close up the VFs and other things in prep for pf Reset.
5307   **/
5308 static int i40e_prep_for_reset(struct i40e_pf *pf)
5309 {
5310         struct i40e_hw *hw = &pf->hw;
5311         i40e_status ret;
5312         u32 v;
5313
5314         clear_bit(__I40E_RESET_INTR_RECEIVED, &pf->state);
5315         if (test_and_set_bit(__I40E_RESET_RECOVERY_PENDING, &pf->state))
5316                 return 0;
5317
5318         dev_dbg(&pf->pdev->dev, "Tearing down internal switch for reset\n");
5319
5320         if (i40e_check_asq_alive(hw))
5321                 i40e_vc_notify_reset(pf);
5322
5323         /* quiesce the VSIs and their queues that are not already DOWN */
5324         i40e_pf_quiesce_all_vsi(pf);
5325
5326         for (v = 0; v < pf->hw.func_caps.num_vsis; v++) {
5327                 if (pf->vsi[v])
5328                         pf->vsi[v]->seid = 0;
5329         }
5330
5331         i40e_shutdown_adminq(&pf->hw);
5332
5333         /* call shutdown HMC */
5334         ret = i40e_shutdown_lan_hmc(hw);
5335         if (ret) {
5336                 dev_info(&pf->pdev->dev, "shutdown_lan_hmc failed: %d\n", ret);
5337                 clear_bit(__I40E_RESET_RECOVERY_PENDING, &pf->state);
5338         }
5339         return ret;
5340 }
5341
5342 /**
5343  * i40e_reset_and_rebuild - reset and rebuild using a saved config
5344  * @pf: board private structure
5345  * @reinit: if the Main VSI needs to re-initialized.
5346  **/
5347 static void i40e_reset_and_rebuild(struct i40e_pf *pf, bool reinit)
5348 {
5349         struct i40e_driver_version dv;
5350         struct i40e_hw *hw = &pf->hw;
5351         i40e_status ret;
5352         u32 v;
5353
5354         /* Now we wait for GRST to settle out.
5355          * We don't have to delete the VEBs or VSIs from the hw switch
5356          * because the reset will make them disappear.
5357          */
5358         ret = i40e_pf_reset(hw);
5359         if (ret)
5360                 dev_info(&pf->pdev->dev, "PF reset failed, %d\n", ret);
5361         pf->pfr_count++;
5362
5363         if (test_bit(__I40E_DOWN, &pf->state))
5364                 goto end_core_reset;
5365         dev_dbg(&pf->pdev->dev, "Rebuilding internal switch\n");
5366
5367         /* rebuild the basics for the AdminQ, HMC, and initial HW switch */
5368         ret = i40e_init_adminq(&pf->hw);
5369         if (ret) {
5370                 dev_info(&pf->pdev->dev, "Rebuild AdminQ failed, %d\n", ret);
5371                 goto end_core_reset;
5372         }
5373
5374         ret = i40e_get_capabilities(pf);
5375         if (ret) {
5376                 dev_info(&pf->pdev->dev, "i40e_get_capabilities failed, %d\n",
5377                          ret);
5378                 goto end_core_reset;
5379         }
5380
5381         ret = i40e_init_lan_hmc(hw, hw->func_caps.num_tx_qp,
5382                                 hw->func_caps.num_rx_qp,
5383                                 pf->fcoe_hmc_cntx_num, pf->fcoe_hmc_filt_num);
5384         if (ret) {
5385                 dev_info(&pf->pdev->dev, "init_lan_hmc failed: %d\n", ret);
5386                 goto end_core_reset;
5387         }
5388         ret = i40e_configure_lan_hmc(hw, I40E_HMC_MODEL_DIRECT_ONLY);
5389         if (ret) {
5390                 dev_info(&pf->pdev->dev, "configure_lan_hmc failed: %d\n", ret);
5391                 goto end_core_reset;
5392         }
5393
5394 #ifdef CONFIG_I40E_DCB
5395         ret = i40e_init_pf_dcb(pf);
5396         if (ret) {
5397                 dev_info(&pf->pdev->dev, "init_pf_dcb failed: %d\n", ret);
5398                 goto end_core_reset;
5399         }
5400 #endif /* CONFIG_I40E_DCB */
5401
5402         /* do basic switch setup */
5403         ret = i40e_setup_pf_switch(pf, reinit);
5404         if (ret)
5405                 goto end_core_reset;
5406
5407         /* Rebuild the VSIs and VEBs that existed before reset.
5408          * They are still in our local switch element arrays, so only
5409          * need to rebuild the switch model in the HW.
5410          *
5411          * If there were VEBs but the reconstitution failed, we'll try
5412          * try to recover minimal use by getting the basic PF VSI working.
5413          */
5414         if (pf->vsi[pf->lan_vsi]->uplink_seid != pf->mac_seid) {
5415                 dev_dbg(&pf->pdev->dev, "attempting to rebuild switch\n");
5416                 /* find the one VEB connected to the MAC, and find orphans */
5417                 for (v = 0; v < I40E_MAX_VEB; v++) {
5418                         if (!pf->veb[v])
5419                                 continue;
5420
5421                         if (pf->veb[v]->uplink_seid == pf->mac_seid ||
5422                             pf->veb[v]->uplink_seid == 0) {
5423                                 ret = i40e_reconstitute_veb(pf->veb[v]);
5424
5425                                 if (!ret)
5426                                         continue;
5427
5428                                 /* If Main VEB failed, we're in deep doodoo,
5429                                  * so give up rebuilding the switch and set up
5430                                  * for minimal rebuild of PF VSI.
5431                                  * If orphan failed, we'll report the error
5432                                  * but try to keep going.
5433                                  */
5434                                 if (pf->veb[v]->uplink_seid == pf->mac_seid) {
5435                                         dev_info(&pf->pdev->dev,
5436                                                  "rebuild of switch failed: %d, will try to set up simple PF connection\n",
5437                                                  ret);
5438                                         pf->vsi[pf->lan_vsi]->uplink_seid
5439                                                                 = pf->mac_seid;
5440                                         break;
5441                                 } else if (pf->veb[v]->uplink_seid == 0) {
5442                                         dev_info(&pf->pdev->dev,
5443                                                  "rebuild of orphan VEB failed: %d\n",
5444                                                  ret);
5445                                 }
5446                         }
5447                 }
5448         }
5449
5450         if (pf->vsi[pf->lan_vsi]->uplink_seid == pf->mac_seid) {
5451                 dev_info(&pf->pdev->dev, "attempting to rebuild PF VSI\n");
5452                 /* no VEB, so rebuild only the Main VSI */
5453                 ret = i40e_add_vsi(pf->vsi[pf->lan_vsi]);
5454                 if (ret) {
5455                         dev_info(&pf->pdev->dev,
5456                                  "rebuild of Main VSI failed: %d\n", ret);
5457                         goto end_core_reset;
5458                 }
5459         }
5460
5461         /* reinit the misc interrupt */
5462         if (pf->flags & I40E_FLAG_MSIX_ENABLED)
5463                 ret = i40e_setup_misc_vector(pf);
5464
5465         /* restart the VSIs that were rebuilt and running before the reset */
5466         i40e_pf_unquiesce_all_vsi(pf);
5467
5468         if (pf->num_alloc_vfs) {
5469                 for (v = 0; v < pf->num_alloc_vfs; v++)
5470                         i40e_reset_vf(&pf->vf[v], true);
5471         }
5472
5473         /* tell the firmware that we're starting */
5474         dv.major_version = DRV_VERSION_MAJOR;
5475         dv.minor_version = DRV_VERSION_MINOR;
5476         dv.build_version = DRV_VERSION_BUILD;
5477         dv.subbuild_version = 0;
5478         i40e_aq_send_driver_version(&pf->hw, &dv, NULL);
5479
5480         dev_info(&pf->pdev->dev, "reset complete\n");
5481
5482 end_core_reset:
5483         clear_bit(__I40E_RESET_RECOVERY_PENDING, &pf->state);
5484 }
5485
5486 /**
5487  * i40e_handle_reset_warning - prep for the pf to reset, reset and rebuild
5488  * @pf: board private structure
5489  *
5490  * Close up the VFs and other things in prep for a Core Reset,
5491  * then get ready to rebuild the world.
5492  **/
5493 static void i40e_handle_reset_warning(struct i40e_pf *pf)
5494 {
5495         i40e_status ret;
5496
5497         ret = i40e_prep_for_reset(pf);
5498         if (!ret)
5499                 i40e_reset_and_rebuild(pf, false);
5500 }
5501
5502 /**
5503  * i40e_handle_mdd_event
5504  * @pf: pointer to the pf structure
5505  *
5506  * Called from the MDD irq handler to identify possibly malicious vfs
5507  **/
5508 static void i40e_handle_mdd_event(struct i40e_pf *pf)
5509 {
5510         struct i40e_hw *hw = &pf->hw;
5511         bool mdd_detected = false;
5512         struct i40e_vf *vf;
5513         u32 reg;
5514         int i;
5515
5516         if (!test_bit(__I40E_MDD_EVENT_PENDING, &pf->state))
5517                 return;
5518
5519         /* find what triggered the MDD event */
5520         reg = rd32(hw, I40E_GL_MDET_TX);
5521         if (reg & I40E_GL_MDET_TX_VALID_MASK) {
5522                 u8 func = (reg & I40E_GL_MDET_TX_FUNCTION_MASK)
5523                                 >> I40E_GL_MDET_TX_FUNCTION_SHIFT;
5524                 u8 event = (reg & I40E_GL_MDET_TX_EVENT_SHIFT)
5525                                 >> I40E_GL_MDET_TX_EVENT_SHIFT;
5526                 u8 queue = (reg & I40E_GL_MDET_TX_QUEUE_MASK)
5527                                 >> I40E_GL_MDET_TX_QUEUE_SHIFT;
5528                 dev_info(&pf->pdev->dev,
5529                          "Malicious Driver Detection event 0x%02x on TX queue %d of function 0x%02x\n",
5530                          event, queue, func);
5531                 wr32(hw, I40E_GL_MDET_TX, 0xffffffff);
5532                 mdd_detected = true;
5533         }
5534         reg = rd32(hw, I40E_GL_MDET_RX);
5535         if (reg & I40E_GL_MDET_RX_VALID_MASK) {
5536                 u8 func = (reg & I40E_GL_MDET_RX_FUNCTION_MASK)
5537                                 >> I40E_GL_MDET_RX_FUNCTION_SHIFT;
5538                 u8 event = (reg & I40E_GL_MDET_RX_EVENT_SHIFT)
5539                                 >> I40E_GL_MDET_RX_EVENT_SHIFT;
5540                 u8 queue = (reg & I40E_GL_MDET_RX_QUEUE_MASK)
5541                                 >> I40E_GL_MDET_RX_QUEUE_SHIFT;
5542                 dev_info(&pf->pdev->dev,
5543                          "Malicious Driver Detection event 0x%02x on RX queue %d of function 0x%02x\n",
5544                          event, queue, func);
5545                 wr32(hw, I40E_GL_MDET_RX, 0xffffffff);
5546                 mdd_detected = true;
5547         }
5548
5549         /* see if one of the VFs needs its hand slapped */
5550         for (i = 0; i < pf->num_alloc_vfs && mdd_detected; i++) {
5551                 vf = &(pf->vf[i]);
5552                 reg = rd32(hw, I40E_VP_MDET_TX(i));
5553                 if (reg & I40E_VP_MDET_TX_VALID_MASK) {
5554                         wr32(hw, I40E_VP_MDET_TX(i), 0xFFFF);
5555                         vf->num_mdd_events++;
5556                         dev_info(&pf->pdev->dev, "MDD TX event on VF %d\n", i);
5557                 }
5558
5559                 reg = rd32(hw, I40E_VP_MDET_RX(i));
5560                 if (reg & I40E_VP_MDET_RX_VALID_MASK) {
5561                         wr32(hw, I40E_VP_MDET_RX(i), 0xFFFF);
5562                         vf->num_mdd_events++;
5563                         dev_info(&pf->pdev->dev, "MDD RX event on VF %d\n", i);
5564                 }
5565
5566                 if (vf->num_mdd_events > I40E_DEFAULT_NUM_MDD_EVENTS_ALLOWED) {
5567                         dev_info(&pf->pdev->dev,
5568                                  "Too many MDD events on VF %d, disabled\n", i);
5569                         dev_info(&pf->pdev->dev,
5570                                  "Use PF Control I/F to re-enable the VF\n");
5571                         set_bit(I40E_VF_STAT_DISABLED, &vf->vf_states);
5572                 }
5573         }
5574
5575         /* re-enable mdd interrupt cause */
5576         clear_bit(__I40E_MDD_EVENT_PENDING, &pf->state);
5577         reg = rd32(hw, I40E_PFINT_ICR0_ENA);
5578         reg |=  I40E_PFINT_ICR0_ENA_MAL_DETECT_MASK;
5579         wr32(hw, I40E_PFINT_ICR0_ENA, reg);
5580         i40e_flush(hw);
5581 }
5582
5583 #ifdef CONFIG_I40E_VXLAN
5584 /**
5585  * i40e_sync_vxlan_filters_subtask - Sync the VSI filter list with HW
5586  * @pf: board private structure
5587  **/
5588 static void i40e_sync_vxlan_filters_subtask(struct i40e_pf *pf)
5589 {
5590         const int vxlan_hdr_qwords = 4;
5591         struct i40e_hw *hw = &pf->hw;
5592         i40e_status ret;
5593         u8 filter_index;
5594         __be16 port;
5595         int i;
5596
5597         if (!(pf->flags & I40E_FLAG_VXLAN_FILTER_SYNC))
5598                 return;
5599
5600         pf->flags &= ~I40E_FLAG_VXLAN_FILTER_SYNC;
5601
5602         for (i = 0; i < I40E_MAX_PF_UDP_OFFLOAD_PORTS; i++) {
5603                 if (pf->pending_vxlan_bitmap & (1 << i)) {
5604                         pf->pending_vxlan_bitmap &= ~(1 << i);
5605                         port = pf->vxlan_ports[i];
5606                         ret = port ?
5607                               i40e_aq_add_udp_tunnel(hw, ntohs(port),
5608                                                      vxlan_hdr_qwords,
5609                                                      I40E_AQC_TUNNEL_TYPE_VXLAN,
5610                                                      &filter_index, NULL)
5611                               : i40e_aq_del_udp_tunnel(hw, i, NULL);
5612
5613                         if (ret) {
5614                                 dev_info(&pf->pdev->dev, "Failed to execute AQ command for %s port %d with index %d\n",
5615                                          port ? "adding" : "deleting",
5616                                          ntohs(port), port ? i : i);
5617
5618                                 pf->vxlan_ports[i] = 0;
5619                         } else {
5620                                 dev_info(&pf->pdev->dev, "%s port %d with AQ command with index %d\n",
5621                                          port ? "Added" : "Deleted",
5622                                          ntohs(port), port ? i : filter_index);
5623                         }
5624                 }
5625         }
5626 }
5627
5628 #endif
5629 /**
5630  * i40e_service_task - Run the driver's async subtasks
5631  * @work: pointer to work_struct containing our data
5632  **/
5633 static void i40e_service_task(struct work_struct *work)
5634 {
5635         struct i40e_pf *pf = container_of(work,
5636                                           struct i40e_pf,
5637                                           service_task);
5638         unsigned long start_time = jiffies;
5639
5640         i40e_reset_subtask(pf);
5641         i40e_handle_mdd_event(pf);
5642         i40e_vc_process_vflr_event(pf);
5643         i40e_watchdog_subtask(pf);
5644         i40e_fdir_reinit_subtask(pf);
5645         i40e_check_hang_subtask(pf);
5646         i40e_sync_filters_subtask(pf);
5647 #ifdef CONFIG_I40E_VXLAN
5648         i40e_sync_vxlan_filters_subtask(pf);
5649 #endif
5650         i40e_clean_adminq_subtask(pf);
5651
5652         i40e_service_event_complete(pf);
5653
5654         /* If the tasks have taken longer than one timer cycle or there
5655          * is more work to be done, reschedule the service task now
5656          * rather than wait for the timer to tick again.
5657          */
5658         if (time_after(jiffies, (start_time + pf->service_timer_period)) ||
5659             test_bit(__I40E_ADMINQ_EVENT_PENDING, &pf->state)            ||
5660             test_bit(__I40E_MDD_EVENT_PENDING, &pf->state)               ||
5661             test_bit(__I40E_VFLR_EVENT_PENDING, &pf->state))
5662                 i40e_service_event_schedule(pf);
5663 }
5664
5665 /**
5666  * i40e_service_timer - timer callback
5667  * @data: pointer to PF struct
5668  **/
5669 static void i40e_service_timer(unsigned long data)
5670 {
5671         struct i40e_pf *pf = (struct i40e_pf *)data;
5672
5673         mod_timer(&pf->service_timer,
5674                   round_jiffies(jiffies + pf->service_timer_period));
5675         i40e_service_event_schedule(pf);
5676 }
5677
5678 /**
5679  * i40e_set_num_rings_in_vsi - Determine number of rings in the VSI
5680  * @vsi: the VSI being configured
5681  **/
5682 static int i40e_set_num_rings_in_vsi(struct i40e_vsi *vsi)
5683 {
5684         struct i40e_pf *pf = vsi->back;
5685
5686         switch (vsi->type) {
5687         case I40E_VSI_MAIN:
5688                 vsi->alloc_queue_pairs = pf->num_lan_qps;
5689                 vsi->num_desc = ALIGN(I40E_DEFAULT_NUM_DESCRIPTORS,
5690                                       I40E_REQ_DESCRIPTOR_MULTIPLE);
5691                 if (pf->flags & I40E_FLAG_MSIX_ENABLED)
5692                         vsi->num_q_vectors = pf->num_lan_msix;
5693                 else
5694                         vsi->num_q_vectors = 1;
5695
5696                 break;
5697
5698         case I40E_VSI_FDIR:
5699                 vsi->alloc_queue_pairs = 1;
5700                 vsi->num_desc = ALIGN(I40E_FDIR_RING_COUNT,
5701                                       I40E_REQ_DESCRIPTOR_MULTIPLE);
5702                 vsi->num_q_vectors = 1;
5703                 break;
5704
5705         case I40E_VSI_VMDQ2:
5706                 vsi->alloc_queue_pairs = pf->num_vmdq_qps;
5707                 vsi->num_desc = ALIGN(I40E_DEFAULT_NUM_DESCRIPTORS,
5708                                       I40E_REQ_DESCRIPTOR_MULTIPLE);
5709                 vsi->num_q_vectors = pf->num_vmdq_msix;
5710                 break;
5711
5712         case I40E_VSI_SRIOV:
5713                 vsi->alloc_queue_pairs = pf->num_vf_qps;
5714                 vsi->num_desc = ALIGN(I40E_DEFAULT_NUM_DESCRIPTORS,
5715                                       I40E_REQ_DESCRIPTOR_MULTIPLE);
5716                 break;
5717
5718         default:
5719                 WARN_ON(1);
5720                 return -ENODATA;
5721         }
5722
5723         return 0;
5724 }
5725
5726 /**
5727  * i40e_vsi_alloc_arrays - Allocate queue and vector pointer arrays for the vsi
5728  * @type: VSI pointer
5729  * @alloc_qvectors: a bool to specify if q_vectors need to be allocated.
5730  *
5731  * On error: returns error code (negative)
5732  * On success: returns 0
5733  **/
5734 static int i40e_vsi_alloc_arrays(struct i40e_vsi *vsi, bool alloc_qvectors)
5735 {
5736         int size;
5737         int ret = 0;
5738
5739         /* allocate memory for both Tx and Rx ring pointers */
5740         size = sizeof(struct i40e_ring *) * vsi->alloc_queue_pairs * 2;
5741         vsi->tx_rings = kzalloc(size, GFP_KERNEL);
5742         if (!vsi->tx_rings)
5743                 return -ENOMEM;
5744         vsi->rx_rings = &vsi->tx_rings[vsi->alloc_queue_pairs];
5745
5746         if (alloc_qvectors) {
5747                 /* allocate memory for q_vector pointers */
5748                 size = sizeof(struct i40e_q_vectors *) * vsi->num_q_vectors;
5749                 vsi->q_vectors = kzalloc(size, GFP_KERNEL);
5750                 if (!vsi->q_vectors) {
5751                         ret = -ENOMEM;
5752                         goto err_vectors;
5753                 }
5754         }
5755         return ret;
5756
5757 err_vectors:
5758         kfree(vsi->tx_rings);
5759         return ret;
5760 }
5761
5762 /**
5763  * i40e_vsi_mem_alloc - Allocates the next available struct vsi in the PF
5764  * @pf: board private structure
5765  * @type: type of VSI
5766  *
5767  * On error: returns error code (negative)
5768  * On success: returns vsi index in PF (positive)
5769  **/
5770 static int i40e_vsi_mem_alloc(struct i40e_pf *pf, enum i40e_vsi_type type)
5771 {
5772         int ret = -ENODEV;
5773         struct i40e_vsi *vsi;
5774         int vsi_idx;
5775         int i;
5776
5777         /* Need to protect the allocation of the VSIs at the PF level */
5778         mutex_lock(&pf->switch_mutex);
5779
5780         /* VSI list may be fragmented if VSI creation/destruction has
5781          * been happening.  We can afford to do a quick scan to look
5782          * for any free VSIs in the list.
5783          *
5784          * find next empty vsi slot, looping back around if necessary
5785          */
5786         i = pf->next_vsi;
5787         while (i < pf->hw.func_caps.num_vsis && pf->vsi[i])
5788                 i++;
5789         if (i >= pf->hw.func_caps.num_vsis) {
5790                 i = 0;
5791                 while (i < pf->next_vsi && pf->vsi[i])
5792                         i++;
5793         }
5794
5795         if (i < pf->hw.func_caps.num_vsis && !pf->vsi[i]) {
5796                 vsi_idx = i;             /* Found one! */
5797         } else {
5798                 ret = -ENODEV;
5799                 goto unlock_pf;  /* out of VSI slots! */
5800         }
5801         pf->next_vsi = ++i;
5802
5803         vsi = kzalloc(sizeof(*vsi), GFP_KERNEL);
5804         if (!vsi) {
5805                 ret = -ENOMEM;
5806                 goto unlock_pf;
5807         }
5808         vsi->type = type;
5809         vsi->back = pf;
5810         set_bit(__I40E_DOWN, &vsi->state);
5811         vsi->flags = 0;
5812         vsi->idx = vsi_idx;
5813         vsi->rx_itr_setting = pf->rx_itr_default;
5814         vsi->tx_itr_setting = pf->tx_itr_default;
5815         vsi->netdev_registered = false;
5816         vsi->work_limit = I40E_DEFAULT_IRQ_WORK;
5817         INIT_LIST_HEAD(&vsi->mac_filter_list);
5818
5819         ret = i40e_set_num_rings_in_vsi(vsi);
5820         if (ret)
5821                 goto err_rings;
5822
5823         ret = i40e_vsi_alloc_arrays(vsi, true);
5824         if (ret)
5825                 goto err_rings;
5826
5827         /* Setup default MSIX irq handler for VSI */
5828         i40e_vsi_setup_irqhandler(vsi, i40e_msix_clean_rings);
5829
5830         pf->vsi[vsi_idx] = vsi;
5831         ret = vsi_idx;
5832         goto unlock_pf;
5833
5834 err_rings:
5835         pf->next_vsi = i - 1;
5836         kfree(vsi);
5837 unlock_pf:
5838         mutex_unlock(&pf->switch_mutex);
5839         return ret;
5840 }
5841
5842 /**
5843  * i40e_vsi_free_arrays - Free queue and vector pointer arrays for the VSI
5844  * @type: VSI pointer
5845  * @free_qvectors: a bool to specify if q_vectors need to be freed.
5846  *
5847  * On error: returns error code (negative)
5848  * On success: returns 0
5849  **/
5850 static void i40e_vsi_free_arrays(struct i40e_vsi *vsi, bool free_qvectors)
5851 {
5852         /* free the ring and vector containers */
5853         if (free_qvectors) {
5854                 kfree(vsi->q_vectors);
5855                 vsi->q_vectors = NULL;
5856         }
5857         kfree(vsi->tx_rings);
5858         vsi->tx_rings = NULL;
5859         vsi->rx_rings = NULL;
5860 }
5861
5862 /**
5863  * i40e_vsi_clear - Deallocate the VSI provided
5864  * @vsi: the VSI being un-configured
5865  **/
5866 static int i40e_vsi_clear(struct i40e_vsi *vsi)
5867 {
5868         struct i40e_pf *pf;
5869
5870         if (!vsi)
5871                 return 0;
5872
5873         if (!vsi->back)
5874                 goto free_vsi;
5875         pf = vsi->back;
5876
5877         mutex_lock(&pf->switch_mutex);
5878         if (!pf->vsi[vsi->idx]) {
5879                 dev_err(&pf->pdev->dev, "pf->vsi[%d] is NULL, just free vsi[%d](%p,type %d)\n",
5880                         vsi->idx, vsi->idx, vsi, vsi->type);
5881                 goto unlock_vsi;
5882         }
5883
5884         if (pf->vsi[vsi->idx] != vsi) {
5885                 dev_err(&pf->pdev->dev,
5886                         "pf->vsi[%d](%p, type %d) != vsi[%d](%p,type %d): no free!\n",
5887                         pf->vsi[vsi->idx]->idx,
5888                         pf->vsi[vsi->idx],
5889                         pf->vsi[vsi->idx]->type,
5890                         vsi->idx, vsi, vsi->type);
5891                 goto unlock_vsi;
5892         }
5893
5894         /* updates the pf for this cleared vsi */
5895         i40e_put_lump(pf->qp_pile, vsi->base_queue, vsi->idx);
5896         i40e_put_lump(pf->irq_pile, vsi->base_vector, vsi->idx);
5897
5898         i40e_vsi_free_arrays(vsi, true);
5899
5900         pf->vsi[vsi->idx] = NULL;
5901         if (vsi->idx < pf->next_vsi)
5902                 pf->next_vsi = vsi->idx;
5903
5904 unlock_vsi:
5905         mutex_unlock(&pf->switch_mutex);
5906 free_vsi:
5907         kfree(vsi);
5908
5909         return 0;
5910 }
5911
5912 /**
5913  * i40e_vsi_clear_rings - Deallocates the Rx and Tx rings for the provided VSI
5914  * @vsi: the VSI being cleaned
5915  **/
5916 static void i40e_vsi_clear_rings(struct i40e_vsi *vsi)
5917 {
5918         int i;
5919
5920         if (vsi->tx_rings && vsi->tx_rings[0]) {
5921                 for (i = 0; i < vsi->alloc_queue_pairs; i++) {
5922                         kfree_rcu(vsi->tx_rings[i], rcu);
5923                         vsi->tx_rings[i] = NULL;
5924                         vsi->rx_rings[i] = NULL;
5925                 }
5926         }
5927 }
5928
5929 /**
5930  * i40e_alloc_rings - Allocates the Rx and Tx rings for the provided VSI
5931  * @vsi: the VSI being configured
5932  **/
5933 static int i40e_alloc_rings(struct i40e_vsi *vsi)
5934 {
5935         struct i40e_pf *pf = vsi->back;
5936         int i;
5937
5938         /* Set basic values in the rings to be used later during open() */
5939         for (i = 0; i < vsi->alloc_queue_pairs; i++) {
5940                 struct i40e_ring *tx_ring;
5941                 struct i40e_ring *rx_ring;
5942
5943                 /* allocate space for both Tx and Rx in one shot */
5944                 tx_ring = kzalloc(sizeof(struct i40e_ring) * 2, GFP_KERNEL);
5945                 if (!tx_ring)
5946                         goto err_out;
5947
5948                 tx_ring->queue_index = i;
5949                 tx_ring->reg_idx = vsi->base_queue + i;
5950                 tx_ring->ring_active = false;
5951                 tx_ring->vsi = vsi;
5952                 tx_ring->netdev = vsi->netdev;
5953                 tx_ring->dev = &pf->pdev->dev;
5954                 tx_ring->count = vsi->num_desc;
5955                 tx_ring->size = 0;
5956                 tx_ring->dcb_tc = 0;
5957                 vsi->tx_rings[i] = tx_ring;
5958
5959                 rx_ring = &tx_ring[1];
5960                 rx_ring->queue_index = i;
5961                 rx_ring->reg_idx = vsi->base_queue + i;
5962                 rx_ring->ring_active = false;
5963                 rx_ring->vsi = vsi;
5964                 rx_ring->netdev = vsi->netdev;
5965                 rx_ring->dev = &pf->pdev->dev;
5966                 rx_ring->count = vsi->num_desc;
5967                 rx_ring->size = 0;
5968                 rx_ring->dcb_tc = 0;
5969                 if (pf->flags & I40E_FLAG_16BYTE_RX_DESC_ENABLED)
5970                         set_ring_16byte_desc_enabled(rx_ring);
5971                 else
5972                         clear_ring_16byte_desc_enabled(rx_ring);
5973                 vsi->rx_rings[i] = rx_ring;
5974         }
5975
5976         return 0;
5977
5978 err_out:
5979         i40e_vsi_clear_rings(vsi);
5980         return -ENOMEM;
5981 }
5982
5983 /**
5984  * i40e_reserve_msix_vectors - Reserve MSI-X vectors in the kernel
5985  * @pf: board private structure
5986  * @vectors: the number of MSI-X vectors to request
5987  *
5988  * Returns the number of vectors reserved, or error
5989  **/
5990 static int i40e_reserve_msix_vectors(struct i40e_pf *pf, int vectors)
5991 {
5992         vectors = pci_enable_msix_range(pf->pdev, pf->msix_entries,
5993                                         I40E_MIN_MSIX, vectors);
5994         if (vectors < 0) {
5995                 dev_info(&pf->pdev->dev,
5996                          "MSI-X vector reservation failed: %d\n", vectors);
5997                 vectors = 0;
5998         }
5999
6000         pf->num_msix_entries = vectors;
6001
6002         return vectors;
6003 }
6004
6005 /**
6006  * i40e_init_msix - Setup the MSIX capability
6007  * @pf: board private structure
6008  *
6009  * Work with the OS to set up the MSIX vectors needed.
6010  *
6011  * Returns 0 on success, negative on failure
6012  **/
6013 static int i40e_init_msix(struct i40e_pf *pf)
6014 {
6015         i40e_status err = 0;
6016         struct i40e_hw *hw = &pf->hw;
6017         int v_budget, i;
6018         int vec;
6019
6020         if (!(pf->flags & I40E_FLAG_MSIX_ENABLED))
6021                 return -ENODEV;
6022
6023         /* The number of vectors we'll request will be comprised of:
6024          *   - Add 1 for "other" cause for Admin Queue events, etc.
6025          *   - The number of LAN queue pairs
6026          *      - Queues being used for RSS.
6027          *              We don't need as many as max_rss_size vectors.
6028          *              use rss_size instead in the calculation since that
6029          *              is governed by number of cpus in the system.
6030          *      - assumes symmetric Tx/Rx pairing
6031          *   - The number of VMDq pairs
6032          * Once we count this up, try the request.
6033          *
6034          * If we can't get what we want, we'll simplify to nearly nothing
6035          * and try again.  If that still fails, we punt.
6036          */
6037         pf->num_lan_msix = pf->num_lan_qps - (pf->rss_size_max - pf->rss_size);
6038         pf->num_vmdq_msix = pf->num_vmdq_qps;
6039         v_budget = 1 + pf->num_lan_msix;
6040         v_budget += (pf->num_vmdq_vsis * pf->num_vmdq_msix);
6041         if (pf->flags & I40E_FLAG_FD_SB_ENABLED)
6042                 v_budget++;
6043
6044         /* Scale down if necessary, and the rings will share vectors */
6045         v_budget = min_t(int, v_budget, hw->func_caps.num_msix_vectors);
6046
6047         pf->msix_entries = kcalloc(v_budget, sizeof(struct msix_entry),
6048                                    GFP_KERNEL);
6049         if (!pf->msix_entries)
6050                 return -ENOMEM;
6051
6052         for (i = 0; i < v_budget; i++)
6053                 pf->msix_entries[i].entry = i;
6054         vec = i40e_reserve_msix_vectors(pf, v_budget);
6055         if (vec < I40E_MIN_MSIX) {
6056                 pf->flags &= ~I40E_FLAG_MSIX_ENABLED;
6057                 kfree(pf->msix_entries);
6058                 pf->msix_entries = NULL;
6059                 return -ENODEV;
6060
6061         } else if (vec == I40E_MIN_MSIX) {
6062                 /* Adjust for minimal MSIX use */
6063                 dev_info(&pf->pdev->dev, "Features disabled, not enough MSI-X vectors\n");
6064                 pf->flags &= ~I40E_FLAG_VMDQ_ENABLED;
6065                 pf->num_vmdq_vsis = 0;
6066                 pf->num_vmdq_qps = 0;
6067                 pf->num_vmdq_msix = 0;
6068                 pf->num_lan_qps = 1;
6069                 pf->num_lan_msix = 1;
6070
6071         } else if (vec != v_budget) {
6072                 /* Scale vector usage down */
6073                 pf->num_vmdq_msix = 1;    /* force VMDqs to only one vector */
6074                 vec--;                    /* reserve the misc vector */
6075
6076                 /* partition out the remaining vectors */
6077                 switch (vec) {
6078                 case 2:
6079                         pf->num_vmdq_vsis = 1;
6080                         pf->num_lan_msix = 1;
6081                         break;
6082                 case 3:
6083                         pf->num_vmdq_vsis = 1;
6084                         pf->num_lan_msix = 2;
6085                         break;
6086                 default:
6087                         pf->num_lan_msix = min_t(int, (vec / 2),
6088                                                  pf->num_lan_qps);
6089                         pf->num_vmdq_vsis = min_t(int, (vec - pf->num_lan_msix),
6090                                                   I40E_DEFAULT_NUM_VMDQ_VSI);
6091                         break;
6092                 }
6093         }
6094
6095         return err;
6096 }
6097
6098 /**
6099  * i40e_alloc_q_vector - Allocate memory for a single interrupt vector
6100  * @vsi: the VSI being configured
6101  * @v_idx: index of the vector in the vsi struct
6102  *
6103  * We allocate one q_vector.  If allocation fails we return -ENOMEM.
6104  **/
6105 static int i40e_alloc_q_vector(struct i40e_vsi *vsi, int v_idx)
6106 {
6107         struct i40e_q_vector *q_vector;
6108
6109         /* allocate q_vector */
6110         q_vector = kzalloc(sizeof(struct i40e_q_vector), GFP_KERNEL);
6111         if (!q_vector)
6112                 return -ENOMEM;
6113
6114         q_vector->vsi = vsi;
6115         q_vector->v_idx = v_idx;
6116         cpumask_set_cpu(v_idx, &q_vector->affinity_mask);
6117         if (vsi->netdev)
6118                 netif_napi_add(vsi->netdev, &q_vector->napi,
6119                                i40e_napi_poll, vsi->work_limit);
6120
6121         q_vector->rx.latency_range = I40E_LOW_LATENCY;
6122         q_vector->tx.latency_range = I40E_LOW_LATENCY;
6123
6124         /* tie q_vector and vsi together */
6125         vsi->q_vectors[v_idx] = q_vector;
6126
6127         return 0;
6128 }
6129
6130 /**
6131  * i40e_alloc_q_vectors - Allocate memory for interrupt vectors
6132  * @vsi: the VSI being configured
6133  *
6134  * We allocate one q_vector per queue interrupt.  If allocation fails we
6135  * return -ENOMEM.
6136  **/
6137 static int i40e_alloc_q_vectors(struct i40e_vsi *vsi)
6138 {
6139         struct i40e_pf *pf = vsi->back;
6140         int v_idx, num_q_vectors;
6141         int err;
6142
6143         /* if not MSIX, give the one vector only to the LAN VSI */
6144         if (pf->flags & I40E_FLAG_MSIX_ENABLED)
6145                 num_q_vectors = vsi->num_q_vectors;
6146         else if (vsi == pf->vsi[pf->lan_vsi])
6147                 num_q_vectors = 1;
6148         else
6149                 return -EINVAL;
6150
6151         for (v_idx = 0; v_idx < num_q_vectors; v_idx++) {
6152                 err = i40e_alloc_q_vector(vsi, v_idx);
6153                 if (err)
6154                         goto err_out;
6155         }
6156
6157         return 0;
6158
6159 err_out:
6160         while (v_idx--)
6161                 i40e_free_q_vector(vsi, v_idx);
6162
6163         return err;
6164 }
6165
6166 /**
6167  * i40e_init_interrupt_scheme - Determine proper interrupt scheme
6168  * @pf: board private structure to initialize
6169  **/
6170 static void i40e_init_interrupt_scheme(struct i40e_pf *pf)
6171 {
6172         int err = 0;
6173
6174         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
6175                 err = i40e_init_msix(pf);
6176                 if (err) {
6177                         pf->flags &= ~(I40E_FLAG_MSIX_ENABLED   |
6178                                        I40E_FLAG_RSS_ENABLED    |
6179                                        I40E_FLAG_DCB_ENABLED    |
6180                                        I40E_FLAG_SRIOV_ENABLED  |
6181                                        I40E_FLAG_FD_SB_ENABLED  |
6182                                        I40E_FLAG_FD_ATR_ENABLED |
6183                                        I40E_FLAG_VMDQ_ENABLED);
6184
6185                         /* rework the queue expectations without MSIX */
6186                         i40e_determine_queue_usage(pf);
6187                 }
6188         }
6189
6190         if (!(pf->flags & I40E_FLAG_MSIX_ENABLED) &&
6191             (pf->flags & I40E_FLAG_MSI_ENABLED)) {
6192                 dev_info(&pf->pdev->dev, "MSI-X not available, trying MSI\n");
6193                 err = pci_enable_msi(pf->pdev);
6194                 if (err) {
6195                         dev_info(&pf->pdev->dev, "MSI init failed - %d\n", err);
6196                         pf->flags &= ~I40E_FLAG_MSI_ENABLED;
6197                 }
6198         }
6199
6200         if (!(pf->flags & (I40E_FLAG_MSIX_ENABLED | I40E_FLAG_MSI_ENABLED)))
6201                 dev_info(&pf->pdev->dev, "MSI-X and MSI not available, falling back to Legacy IRQ\n");
6202
6203         /* track first vector for misc interrupts */
6204         err = i40e_get_lump(pf, pf->irq_pile, 1, I40E_PILE_VALID_BIT-1);
6205 }
6206
6207 /**
6208  * i40e_setup_misc_vector - Setup the misc vector to handle non queue events
6209  * @pf: board private structure
6210  *
6211  * This sets up the handler for MSIX 0, which is used to manage the
6212  * non-queue interrupts, e.g. AdminQ and errors.  This is not used
6213  * when in MSI or Legacy interrupt mode.
6214  **/
6215 static int i40e_setup_misc_vector(struct i40e_pf *pf)
6216 {
6217         struct i40e_hw *hw = &pf->hw;
6218         int err = 0;
6219
6220         /* Only request the irq if this is the first time through, and
6221          * not when we're rebuilding after a Reset
6222          */
6223         if (!test_bit(__I40E_RESET_RECOVERY_PENDING, &pf->state)) {
6224                 err = request_irq(pf->msix_entries[0].vector,
6225                                   i40e_intr, 0, pf->misc_int_name, pf);
6226                 if (err) {
6227                         dev_info(&pf->pdev->dev,
6228                                  "request_irq for %s failed: %d\n",
6229                                  pf->misc_int_name, err);
6230                         return -EFAULT;
6231                 }
6232         }
6233
6234         i40e_enable_misc_int_causes(hw);
6235
6236         /* associate no queues to the misc vector */
6237         wr32(hw, I40E_PFINT_LNKLST0, I40E_QUEUE_END_OF_LIST);
6238         wr32(hw, I40E_PFINT_ITR0(I40E_RX_ITR), I40E_ITR_8K);
6239
6240         i40e_flush(hw);
6241
6242         i40e_irq_dynamic_enable_icr0(pf);
6243
6244         return err;
6245 }
6246
6247 /**
6248  * i40e_config_rss - Prepare for RSS if used
6249  * @pf: board private structure
6250  **/
6251 static int i40e_config_rss(struct i40e_pf *pf)
6252 {
6253         /* Set of random keys generated using kernel random number generator */
6254         static const u32 seed[I40E_PFQF_HKEY_MAX_INDEX + 1] = {0x41b01687,
6255                                 0x183cfd8c, 0xce880440, 0x580cbc3c, 0x35897377,
6256                                 0x328b25e1, 0x4fa98922, 0xb7d90c14, 0xd5bad70d,
6257                                 0xcd15a2c1, 0xe8580225, 0x4a1e9d11, 0xfe5731be};
6258         struct i40e_hw *hw = &pf->hw;
6259         u32 lut = 0;
6260         int i, j;
6261         u64 hena;
6262
6263         /* Fill out hash function seed */
6264         for (i = 0; i <= I40E_PFQF_HKEY_MAX_INDEX; i++)
6265                 wr32(hw, I40E_PFQF_HKEY(i), seed[i]);
6266
6267         /* By default we enable TCP/UDP with IPv4/IPv6 ptypes */
6268         hena = (u64)rd32(hw, I40E_PFQF_HENA(0)) |
6269                 ((u64)rd32(hw, I40E_PFQF_HENA(1)) << 32);
6270         hena |= I40E_DEFAULT_RSS_HENA;
6271         wr32(hw, I40E_PFQF_HENA(0), (u32)hena);
6272         wr32(hw, I40E_PFQF_HENA(1), (u32)(hena >> 32));
6273
6274         /* Populate the LUT with max no. of queues in round robin fashion */
6275         for (i = 0, j = 0; i < pf->hw.func_caps.rss_table_size; i++, j++) {
6276
6277                 /* The assumption is that lan qp count will be the highest
6278                  * qp count for any PF VSI that needs RSS.
6279                  * If multiple VSIs need RSS support, all the qp counts
6280                  * for those VSIs should be a power of 2 for RSS to work.
6281                  * If LAN VSI is the only consumer for RSS then this requirement
6282                  * is not necessary.
6283                  */
6284                 if (j == pf->rss_size)
6285                         j = 0;
6286                 /* lut = 4-byte sliding window of 4 lut entries */
6287                 lut = (lut << 8) | (j &
6288                          ((0x1 << pf->hw.func_caps.rss_table_entry_width) - 1));
6289                 /* On i = 3, we have 4 entries in lut; write to the register */
6290                 if ((i & 3) == 3)
6291                         wr32(hw, I40E_PFQF_HLUT(i >> 2), lut);
6292         }
6293         i40e_flush(hw);
6294
6295         return 0;
6296 }
6297
6298 /**
6299  * i40e_reconfig_rss_queues - change number of queues for rss and rebuild
6300  * @pf: board private structure
6301  * @queue_count: the requested queue count for rss.
6302  *
6303  * returns 0 if rss is not enabled, if enabled returns the final rss queue
6304  * count which may be different from the requested queue count.
6305  **/
6306 int i40e_reconfig_rss_queues(struct i40e_pf *pf, int queue_count)
6307 {
6308         if (!(pf->flags & I40E_FLAG_RSS_ENABLED))
6309                 return 0;
6310
6311         queue_count = min_t(int, queue_count, pf->rss_size_max);
6312         queue_count = rounddown_pow_of_two(queue_count);
6313
6314         if (queue_count != pf->rss_size) {
6315                 i40e_prep_for_reset(pf);
6316
6317                 pf->rss_size = queue_count;
6318
6319                 i40e_reset_and_rebuild(pf, true);
6320                 i40e_config_rss(pf);
6321         }
6322         dev_info(&pf->pdev->dev, "RSS count:  %d\n", pf->rss_size);
6323         return pf->rss_size;
6324 }
6325
6326 /**
6327  * i40e_sw_init - Initialize general software structures (struct i40e_pf)
6328  * @pf: board private structure to initialize
6329  *
6330  * i40e_sw_init initializes the Adapter private data structure.
6331  * Fields are initialized based on PCI device information and
6332  * OS network device settings (MTU size).
6333  **/
6334 static int i40e_sw_init(struct i40e_pf *pf)
6335 {
6336         int err = 0;
6337         int size;
6338
6339         pf->msg_enable = netif_msg_init(I40E_DEFAULT_MSG_ENABLE,
6340                                 (NETIF_MSG_DRV|NETIF_MSG_PROBE|NETIF_MSG_LINK));
6341         pf->hw.debug_mask = pf->msg_enable | I40E_DEBUG_DIAG;
6342         if (debug != -1 && debug != I40E_DEFAULT_MSG_ENABLE) {
6343                 if (I40E_DEBUG_USER & debug)
6344                         pf->hw.debug_mask = debug;
6345                 pf->msg_enable = netif_msg_init((debug & ~I40E_DEBUG_USER),
6346                                                 I40E_DEFAULT_MSG_ENABLE);
6347         }
6348
6349         /* Set default capability flags */
6350         pf->flags = I40E_FLAG_RX_CSUM_ENABLED |
6351                     I40E_FLAG_MSI_ENABLED     |
6352                     I40E_FLAG_MSIX_ENABLED    |
6353                     I40E_FLAG_RX_1BUF_ENABLED;
6354
6355         /* Depending on PF configurations, it is possible that the RSS
6356          * maximum might end up larger than the available queues
6357          */
6358         pf->rss_size_max = 0x1 << pf->hw.func_caps.rss_table_entry_width;
6359         pf->rss_size_max = min_t(int, pf->rss_size_max,
6360                                  pf->hw.func_caps.num_tx_qp);
6361         if (pf->hw.func_caps.rss) {
6362                 pf->flags |= I40E_FLAG_RSS_ENABLED;
6363                 pf->rss_size = min_t(int, pf->rss_size_max, num_online_cpus());
6364                 pf->rss_size = rounddown_pow_of_two(pf->rss_size);
6365         } else {
6366                 pf->rss_size = 1;
6367         }
6368
6369         /* MFP mode enabled */
6370         if (pf->hw.func_caps.npar_enable || pf->hw.func_caps.mfp_mode_1) {
6371                 pf->flags |= I40E_FLAG_MFP_ENABLED;
6372                 dev_info(&pf->pdev->dev, "MFP mode Enabled\n");
6373         }
6374
6375         /* FW/NVM is not yet fixed in this regard */
6376         if ((pf->hw.func_caps.fd_filters_guaranteed > 0) ||
6377             (pf->hw.func_caps.fd_filters_best_effort > 0)) {
6378                 pf->flags |= I40E_FLAG_FD_ATR_ENABLED;
6379                 pf->atr_sample_rate = I40E_DEFAULT_ATR_SAMPLE_RATE;
6380                 if (!(pf->flags & I40E_FLAG_MFP_ENABLED)) {
6381                         pf->flags |= I40E_FLAG_FD_SB_ENABLED;
6382                 } else {
6383                         dev_info(&pf->pdev->dev,
6384                                  "Flow Director Side Band mode Disabled in MFP mode\n");
6385                 }
6386                 pf->fdir_pf_filter_count =
6387                                  pf->hw.func_caps.fd_filters_guaranteed;
6388                 pf->hw.fdir_shared_filter_count =
6389                                  pf->hw.func_caps.fd_filters_best_effort;
6390         }
6391
6392         if (pf->hw.func_caps.vmdq) {
6393                 pf->flags |= I40E_FLAG_VMDQ_ENABLED;
6394                 pf->num_vmdq_vsis = I40E_DEFAULT_NUM_VMDQ_VSI;
6395                 pf->num_vmdq_qps = I40E_DEFAULT_QUEUES_PER_VMDQ;
6396         }
6397
6398 #ifdef CONFIG_PCI_IOV
6399         if (pf->hw.func_caps.num_vfs) {
6400                 pf->num_vf_qps = I40E_DEFAULT_QUEUES_PER_VF;
6401                 pf->flags |= I40E_FLAG_SRIOV_ENABLED;
6402                 pf->num_req_vfs = min_t(int,
6403                                         pf->hw.func_caps.num_vfs,
6404                                         I40E_MAX_VF_COUNT);
6405         }
6406 #endif /* CONFIG_PCI_IOV */
6407         pf->eeprom_version = 0xDEAD;
6408         pf->lan_veb = I40E_NO_VEB;
6409         pf->lan_vsi = I40E_NO_VSI;
6410
6411         /* set up queue assignment tracking */
6412         size = sizeof(struct i40e_lump_tracking)
6413                 + (sizeof(u16) * pf->hw.func_caps.num_tx_qp);
6414         pf->qp_pile = kzalloc(size, GFP_KERNEL);
6415         if (!pf->qp_pile) {
6416                 err = -ENOMEM;
6417                 goto sw_init_done;
6418         }
6419         pf->qp_pile->num_entries = pf->hw.func_caps.num_tx_qp;
6420         pf->qp_pile->search_hint = 0;
6421
6422         /* set up vector assignment tracking */
6423         size = sizeof(struct i40e_lump_tracking)
6424                 + (sizeof(u16) * pf->hw.func_caps.num_msix_vectors);
6425         pf->irq_pile = kzalloc(size, GFP_KERNEL);
6426         if (!pf->irq_pile) {
6427                 kfree(pf->qp_pile);
6428                 err = -ENOMEM;
6429                 goto sw_init_done;
6430         }
6431         pf->irq_pile->num_entries = pf->hw.func_caps.num_msix_vectors;
6432         pf->irq_pile->search_hint = 0;
6433
6434         mutex_init(&pf->switch_mutex);
6435
6436 sw_init_done:
6437         return err;
6438 }
6439
6440 /**
6441  * i40e_set_ntuple - set the ntuple feature flag and take action
6442  * @pf: board private structure to initialize
6443  * @features: the feature set that the stack is suggesting
6444  *
6445  * returns a bool to indicate if reset needs to happen
6446  **/
6447 bool i40e_set_ntuple(struct i40e_pf *pf, netdev_features_t features)
6448 {
6449         bool need_reset = false;
6450
6451         /* Check if Flow Director n-tuple support was enabled or disabled.  If
6452          * the state changed, we need to reset.
6453          */
6454         if (features & NETIF_F_NTUPLE) {
6455                 /* Enable filters and mark for reset */
6456                 if (!(pf->flags & I40E_FLAG_FD_SB_ENABLED))
6457                         need_reset = true;
6458                 pf->flags |= I40E_FLAG_FD_SB_ENABLED;
6459         } else {
6460                 /* turn off filters, mark for reset and clear SW filter list */
6461                 if (pf->flags & I40E_FLAG_FD_SB_ENABLED) {
6462                         need_reset = true;
6463                         i40e_fdir_filter_exit(pf);
6464                 }
6465                 pf->flags &= ~I40E_FLAG_FD_SB_ENABLED;
6466                 /* if ATR was disabled it can be re-enabled. */
6467                 if (!(pf->flags & I40E_FLAG_FD_ATR_ENABLED))
6468                         pf->flags |= I40E_FLAG_FD_ATR_ENABLED;
6469         }
6470         return need_reset;
6471 }
6472
6473 /**
6474  * i40e_set_features - set the netdev feature flags
6475  * @netdev: ptr to the netdev being adjusted
6476  * @features: the feature set that the stack is suggesting
6477  **/
6478 static int i40e_set_features(struct net_device *netdev,
6479                              netdev_features_t features)
6480 {
6481         struct i40e_netdev_priv *np = netdev_priv(netdev);
6482         struct i40e_vsi *vsi = np->vsi;
6483         struct i40e_pf *pf = vsi->back;
6484         bool need_reset;
6485
6486         if (features & NETIF_F_HW_VLAN_CTAG_RX)
6487                 i40e_vlan_stripping_enable(vsi);
6488         else
6489                 i40e_vlan_stripping_disable(vsi);
6490
6491         need_reset = i40e_set_ntuple(pf, features);
6492
6493         if (need_reset)
6494                 i40e_do_reset(pf, (1 << __I40E_PF_RESET_REQUESTED));
6495
6496         return 0;
6497 }
6498
6499 #ifdef CONFIG_I40E_VXLAN
6500 /**
6501  * i40e_get_vxlan_port_idx - Lookup a possibly offloaded for Rx UDP port
6502  * @pf: board private structure
6503  * @port: The UDP port to look up
6504  *
6505  * Returns the index number or I40E_MAX_PF_UDP_OFFLOAD_PORTS if port not found
6506  **/
6507 static u8 i40e_get_vxlan_port_idx(struct i40e_pf *pf, __be16 port)
6508 {
6509         u8 i;
6510
6511         for (i = 0; i < I40E_MAX_PF_UDP_OFFLOAD_PORTS; i++) {
6512                 if (pf->vxlan_ports[i] == port)
6513                         return i;
6514         }
6515
6516         return i;
6517 }
6518
6519 /**
6520  * i40e_add_vxlan_port - Get notifications about VXLAN ports that come up
6521  * @netdev: This physical port's netdev
6522  * @sa_family: Socket Family that VXLAN is notifying us about
6523  * @port: New UDP port number that VXLAN started listening to
6524  **/
6525 static void i40e_add_vxlan_port(struct net_device *netdev,
6526                                 sa_family_t sa_family, __be16 port)
6527 {
6528         struct i40e_netdev_priv *np = netdev_priv(netdev);
6529         struct i40e_vsi *vsi = np->vsi;
6530         struct i40e_pf *pf = vsi->back;
6531         u8 next_idx;
6532         u8 idx;
6533
6534         if (sa_family == AF_INET6)
6535                 return;
6536
6537         idx = i40e_get_vxlan_port_idx(pf, port);
6538
6539         /* Check if port already exists */
6540         if (idx < I40E_MAX_PF_UDP_OFFLOAD_PORTS) {
6541                 netdev_info(netdev, "Port %d already offloaded\n", ntohs(port));
6542                 return;
6543         }
6544
6545         /* Now check if there is space to add the new port */
6546         next_idx = i40e_get_vxlan_port_idx(pf, 0);
6547
6548         if (next_idx == I40E_MAX_PF_UDP_OFFLOAD_PORTS) {
6549                 netdev_info(netdev, "Maximum number of UDP ports reached, not adding port %d\n",
6550                             ntohs(port));
6551                 return;
6552         }
6553
6554         /* New port: add it and mark its index in the bitmap */
6555         pf->vxlan_ports[next_idx] = port;
6556         pf->pending_vxlan_bitmap |= (1 << next_idx);
6557
6558         pf->flags |= I40E_FLAG_VXLAN_FILTER_SYNC;
6559 }
6560
6561 /**
6562  * i40e_del_vxlan_port - Get notifications about VXLAN ports that go away
6563  * @netdev: This physical port's netdev
6564  * @sa_family: Socket Family that VXLAN is notifying us about
6565  * @port: UDP port number that VXLAN stopped listening to
6566  **/
6567 static void i40e_del_vxlan_port(struct net_device *netdev,
6568                                 sa_family_t sa_family, __be16 port)
6569 {
6570         struct i40e_netdev_priv *np = netdev_priv(netdev);
6571         struct i40e_vsi *vsi = np->vsi;
6572         struct i40e_pf *pf = vsi->back;
6573         u8 idx;
6574
6575         if (sa_family == AF_INET6)
6576                 return;
6577
6578         idx = i40e_get_vxlan_port_idx(pf, port);
6579
6580         /* Check if port already exists */
6581         if (idx < I40E_MAX_PF_UDP_OFFLOAD_PORTS) {
6582                 /* if port exists, set it to 0 (mark for deletion)
6583                  * and make it pending
6584                  */
6585                 pf->vxlan_ports[idx] = 0;
6586
6587                 pf->pending_vxlan_bitmap |= (1 << idx);
6588
6589                 pf->flags |= I40E_FLAG_VXLAN_FILTER_SYNC;
6590         } else {
6591                 netdev_warn(netdev, "Port %d was not found, not deleting\n",
6592                             ntohs(port));
6593         }
6594 }
6595
6596 #endif
6597 static const struct net_device_ops i40e_netdev_ops = {
6598         .ndo_open               = i40e_open,
6599         .ndo_stop               = i40e_close,
6600         .ndo_start_xmit         = i40e_lan_xmit_frame,
6601         .ndo_get_stats64        = i40e_get_netdev_stats_struct,
6602         .ndo_set_rx_mode        = i40e_set_rx_mode,
6603         .ndo_validate_addr      = eth_validate_addr,
6604         .ndo_set_mac_address    = i40e_set_mac,
6605         .ndo_change_mtu         = i40e_change_mtu,
6606         .ndo_do_ioctl           = i40e_ioctl,
6607         .ndo_tx_timeout         = i40e_tx_timeout,
6608         .ndo_vlan_rx_add_vid    = i40e_vlan_rx_add_vid,
6609         .ndo_vlan_rx_kill_vid   = i40e_vlan_rx_kill_vid,
6610 #ifdef CONFIG_NET_POLL_CONTROLLER
6611         .ndo_poll_controller    = i40e_netpoll,
6612 #endif
6613         .ndo_setup_tc           = i40e_setup_tc,
6614         .ndo_set_features       = i40e_set_features,
6615         .ndo_set_vf_mac         = i40e_ndo_set_vf_mac,
6616         .ndo_set_vf_vlan        = i40e_ndo_set_vf_port_vlan,
6617         .ndo_set_vf_tx_rate     = i40e_ndo_set_vf_bw,
6618         .ndo_get_vf_config      = i40e_ndo_get_vf_config,
6619         .ndo_set_vf_link_state  = i40e_ndo_set_vf_link_state,
6620 #ifdef CONFIG_I40E_VXLAN
6621         .ndo_add_vxlan_port     = i40e_add_vxlan_port,
6622         .ndo_del_vxlan_port     = i40e_del_vxlan_port,
6623 #endif
6624 };
6625
6626 /**
6627  * i40e_config_netdev - Setup the netdev flags
6628  * @vsi: the VSI being configured
6629  *
6630  * Returns 0 on success, negative value on failure
6631  **/
6632 static int i40e_config_netdev(struct i40e_vsi *vsi)
6633 {
6634         u8 brdcast[ETH_ALEN] = {0xff, 0xff, 0xff, 0xff, 0xff, 0xff};
6635         struct i40e_pf *pf = vsi->back;
6636         struct i40e_hw *hw = &pf->hw;
6637         struct i40e_netdev_priv *np;
6638         struct net_device *netdev;
6639         u8 mac_addr[ETH_ALEN];
6640         int etherdev_size;
6641
6642         etherdev_size = sizeof(struct i40e_netdev_priv);
6643         netdev = alloc_etherdev_mq(etherdev_size, vsi->alloc_queue_pairs);
6644         if (!netdev)
6645                 return -ENOMEM;
6646
6647         vsi->netdev = netdev;
6648         np = netdev_priv(netdev);
6649         np->vsi = vsi;
6650
6651         netdev->hw_enc_features |= NETIF_F_IP_CSUM       |
6652                                   NETIF_F_GSO_UDP_TUNNEL |
6653                                   NETIF_F_TSO;
6654
6655         netdev->features = NETIF_F_SG                  |
6656                            NETIF_F_IP_CSUM             |
6657                            NETIF_F_SCTP_CSUM           |
6658                            NETIF_F_HIGHDMA             |
6659                            NETIF_F_GSO_UDP_TUNNEL      |
6660                            NETIF_F_HW_VLAN_CTAG_TX     |
6661                            NETIF_F_HW_VLAN_CTAG_RX     |
6662                            NETIF_F_HW_VLAN_CTAG_FILTER |
6663                            NETIF_F_IPV6_CSUM           |
6664                            NETIF_F_TSO                 |
6665                            NETIF_F_TSO6                |
6666                            NETIF_F_RXCSUM              |
6667                            NETIF_F_NTUPLE              |
6668                            NETIF_F_RXHASH              |
6669                            0;
6670
6671         /* copy netdev features into list of user selectable features */
6672         netdev->hw_features |= netdev->features;
6673
6674         if (vsi->type == I40E_VSI_MAIN) {
6675                 SET_NETDEV_DEV(netdev, &pf->pdev->dev);
6676                 memcpy(mac_addr, hw->mac.perm_addr, ETH_ALEN);
6677         } else {
6678                 /* relate the VSI_VMDQ name to the VSI_MAIN name */
6679                 snprintf(netdev->name, IFNAMSIZ, "%sv%%d",
6680                          pf->vsi[pf->lan_vsi]->netdev->name);
6681                 random_ether_addr(mac_addr);
6682                 i40e_add_filter(vsi, mac_addr, I40E_VLAN_ANY, false, false);
6683         }
6684         i40e_add_filter(vsi, brdcast, I40E_VLAN_ANY, false, false);
6685
6686         memcpy(netdev->dev_addr, mac_addr, ETH_ALEN);
6687         memcpy(netdev->perm_addr, mac_addr, ETH_ALEN);
6688         /* vlan gets same features (except vlan offload)
6689          * after any tweaks for specific VSI types
6690          */
6691         netdev->vlan_features = netdev->features & ~(NETIF_F_HW_VLAN_CTAG_TX |
6692                                                      NETIF_F_HW_VLAN_CTAG_RX |
6693                                                    NETIF_F_HW_VLAN_CTAG_FILTER);
6694         netdev->priv_flags |= IFF_UNICAST_FLT;
6695         netdev->priv_flags |= IFF_SUPP_NOFCS;
6696         /* Setup netdev TC information */
6697         i40e_vsi_config_netdev_tc(vsi, vsi->tc_config.enabled_tc);
6698
6699         netdev->netdev_ops = &i40e_netdev_ops;
6700         netdev->watchdog_timeo = 5 * HZ;
6701         i40e_set_ethtool_ops(netdev);
6702
6703         return 0;
6704 }
6705
6706 /**
6707  * i40e_vsi_delete - Delete a VSI from the switch
6708  * @vsi: the VSI being removed
6709  *
6710  * Returns 0 on success, negative value on failure
6711  **/
6712 static void i40e_vsi_delete(struct i40e_vsi *vsi)
6713 {
6714         /* remove default VSI is not allowed */
6715         if (vsi == vsi->back->vsi[vsi->back->lan_vsi])
6716                 return;
6717
6718         i40e_aq_delete_element(&vsi->back->hw, vsi->seid, NULL);
6719         return;
6720 }
6721
6722 /**
6723  * i40e_add_vsi - Add a VSI to the switch
6724  * @vsi: the VSI being configured
6725  *
6726  * This initializes a VSI context depending on the VSI type to be added and
6727  * passes it down to the add_vsi aq command.
6728  **/
6729 static int i40e_add_vsi(struct i40e_vsi *vsi)
6730 {
6731         int ret = -ENODEV;
6732         struct i40e_mac_filter *f, *ftmp;
6733         struct i40e_pf *pf = vsi->back;
6734         struct i40e_hw *hw = &pf->hw;
6735         struct i40e_vsi_context ctxt;
6736         u8 enabled_tc = 0x1; /* TC0 enabled */
6737         int f_count = 0;
6738
6739         memset(&ctxt, 0, sizeof(ctxt));
6740         switch (vsi->type) {
6741         case I40E_VSI_MAIN:
6742                 /* The PF's main VSI is already setup as part of the
6743                  * device initialization, so we'll not bother with
6744                  * the add_vsi call, but we will retrieve the current
6745                  * VSI context.
6746                  */
6747                 ctxt.seid = pf->main_vsi_seid;
6748                 ctxt.pf_num = pf->hw.pf_id;
6749                 ctxt.vf_num = 0;
6750                 ret = i40e_aq_get_vsi_params(&pf->hw, &ctxt, NULL);
6751                 ctxt.flags = I40E_AQ_VSI_TYPE_PF;
6752                 if (ret) {
6753                         dev_info(&pf->pdev->dev,
6754                                  "couldn't get pf vsi config, err %d, aq_err %d\n",
6755                                  ret, pf->hw.aq.asq_last_status);
6756                         return -ENOENT;
6757                 }
6758                 memcpy(&vsi->info, &ctxt.info, sizeof(ctxt.info));
6759                 vsi->info.valid_sections = 0;
6760
6761                 vsi->seid = ctxt.seid;
6762                 vsi->id = ctxt.vsi_number;
6763
6764                 enabled_tc = i40e_pf_get_tc_map(pf);
6765
6766                 /* MFP mode setup queue map and update VSI */
6767                 if (pf->flags & I40E_FLAG_MFP_ENABLED) {
6768                         memset(&ctxt, 0, sizeof(ctxt));
6769                         ctxt.seid = pf->main_vsi_seid;
6770                         ctxt.pf_num = pf->hw.pf_id;
6771                         ctxt.vf_num = 0;
6772                         i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, false);
6773                         ret = i40e_aq_update_vsi_params(hw, &ctxt, NULL);
6774                         if (ret) {
6775                                 dev_info(&pf->pdev->dev,
6776                                          "update vsi failed, aq_err=%d\n",
6777                                          pf->hw.aq.asq_last_status);
6778                                 ret = -ENOENT;
6779                                 goto err;
6780                         }
6781                         /* update the local VSI info queue map */
6782                         i40e_vsi_update_queue_map(vsi, &ctxt);
6783                         vsi->info.valid_sections = 0;
6784                 } else {
6785                         /* Default/Main VSI is only enabled for TC0
6786                          * reconfigure it to enable all TCs that are
6787                          * available on the port in SFP mode.
6788                          */
6789                         ret = i40e_vsi_config_tc(vsi, enabled_tc);
6790                         if (ret) {
6791                                 dev_info(&pf->pdev->dev,
6792                                          "failed to configure TCs for main VSI tc_map 0x%08x, err %d, aq_err %d\n",
6793                                          enabled_tc, ret,
6794                                          pf->hw.aq.asq_last_status);
6795                                 ret = -ENOENT;
6796                         }
6797                 }
6798                 break;
6799
6800         case I40E_VSI_FDIR:
6801                 ctxt.pf_num = hw->pf_id;
6802                 ctxt.vf_num = 0;
6803                 ctxt.uplink_seid = vsi->uplink_seid;
6804                 ctxt.connection_type = 0x1;     /* regular data port */
6805                 ctxt.flags = I40E_AQ_VSI_TYPE_PF;
6806                 i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, true);
6807                 break;
6808
6809         case I40E_VSI_VMDQ2:
6810                 ctxt.pf_num = hw->pf_id;
6811                 ctxt.vf_num = 0;
6812                 ctxt.uplink_seid = vsi->uplink_seid;
6813                 ctxt.connection_type = 0x1;     /* regular data port */
6814                 ctxt.flags = I40E_AQ_VSI_TYPE_VMDQ2;
6815
6816                 ctxt.info.valid_sections |= cpu_to_le16(I40E_AQ_VSI_PROP_SWITCH_VALID);
6817
6818                 /* This VSI is connected to VEB so the switch_id
6819                  * should be set to zero by default.
6820                  */
6821                 ctxt.info.switch_id = 0;
6822                 ctxt.info.switch_id |= cpu_to_le16(I40E_AQ_VSI_SW_ID_FLAG_LOCAL_LB);
6823                 ctxt.info.switch_id |= cpu_to_le16(I40E_AQ_VSI_SW_ID_FLAG_ALLOW_LB);
6824
6825                 /* Setup the VSI tx/rx queue map for TC0 only for now */
6826                 i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, true);
6827                 break;
6828
6829         case I40E_VSI_SRIOV:
6830                 ctxt.pf_num = hw->pf_id;
6831                 ctxt.vf_num = vsi->vf_id + hw->func_caps.vf_base_id;
6832                 ctxt.uplink_seid = vsi->uplink_seid;
6833                 ctxt.connection_type = 0x1;     /* regular data port */
6834                 ctxt.flags = I40E_AQ_VSI_TYPE_VF;
6835
6836                 ctxt.info.valid_sections |= cpu_to_le16(I40E_AQ_VSI_PROP_SWITCH_VALID);
6837
6838                 /* This VSI is connected to VEB so the switch_id
6839                  * should be set to zero by default.
6840                  */
6841                 ctxt.info.switch_id = cpu_to_le16(I40E_AQ_VSI_SW_ID_FLAG_ALLOW_LB);
6842
6843                 ctxt.info.valid_sections |= cpu_to_le16(I40E_AQ_VSI_PROP_VLAN_VALID);
6844                 ctxt.info.port_vlan_flags |= I40E_AQ_VSI_PVLAN_MODE_ALL;
6845                 /* Setup the VSI tx/rx queue map for TC0 only for now */
6846                 i40e_vsi_setup_queue_map(vsi, &ctxt, enabled_tc, true);
6847                 break;
6848
6849         default:
6850                 return -ENODEV;
6851         }
6852
6853         if (vsi->type != I40E_VSI_MAIN) {
6854                 ret = i40e_aq_add_vsi(hw, &ctxt, NULL);
6855                 if (ret) {
6856                         dev_info(&vsi->back->pdev->dev,
6857                                  "add vsi failed, aq_err=%d\n",
6858                                  vsi->back->hw.aq.asq_last_status);
6859                         ret = -ENOENT;
6860                         goto err;
6861                 }
6862                 memcpy(&vsi->info, &ctxt.info, sizeof(ctxt.info));
6863                 vsi->info.valid_sections = 0;
6864                 vsi->seid = ctxt.seid;
6865                 vsi->id = ctxt.vsi_number;
6866         }
6867
6868         /* If macvlan filters already exist, force them to get loaded */
6869         list_for_each_entry_safe(f, ftmp, &vsi->mac_filter_list, list) {
6870                 f->changed = true;
6871                 f_count++;
6872         }
6873         if (f_count) {
6874                 vsi->flags |= I40E_VSI_FLAG_FILTER_CHANGED;
6875                 pf->flags |= I40E_FLAG_FILTER_SYNC;
6876         }
6877
6878         /* Update VSI BW information */
6879         ret = i40e_vsi_get_bw_info(vsi);
6880         if (ret) {
6881                 dev_info(&pf->pdev->dev,
6882                          "couldn't get vsi bw info, err %d, aq_err %d\n",
6883                          ret, pf->hw.aq.asq_last_status);
6884                 /* VSI is already added so not tearing that up */
6885                 ret = 0;
6886         }
6887
6888 err:
6889         return ret;
6890 }
6891
6892 /**
6893  * i40e_vsi_release - Delete a VSI and free its resources
6894  * @vsi: the VSI being removed
6895  *
6896  * Returns 0 on success or < 0 on error
6897  **/
6898 int i40e_vsi_release(struct i40e_vsi *vsi)
6899 {
6900         struct i40e_mac_filter *f, *ftmp;
6901         struct i40e_veb *veb = NULL;
6902         struct i40e_pf *pf;
6903         u16 uplink_seid;
6904         int i, n;
6905
6906         pf = vsi->back;
6907
6908         /* release of a VEB-owner or last VSI is not allowed */
6909         if (vsi->flags & I40E_VSI_FLAG_VEB_OWNER) {
6910                 dev_info(&pf->pdev->dev, "VSI %d has existing VEB %d\n",
6911                          vsi->seid, vsi->uplink_seid);
6912                 return -ENODEV;
6913         }
6914         if (vsi == pf->vsi[pf->lan_vsi] &&
6915             !test_bit(__I40E_DOWN, &pf->state)) {
6916                 dev_info(&pf->pdev->dev, "Can't remove PF VSI\n");
6917                 return -ENODEV;
6918         }
6919
6920         uplink_seid = vsi->uplink_seid;
6921         if (vsi->type != I40E_VSI_SRIOV) {
6922                 if (vsi->netdev_registered) {
6923                         vsi->netdev_registered = false;
6924                         if (vsi->netdev) {
6925                                 /* results in a call to i40e_close() */
6926                                 unregister_netdev(vsi->netdev);
6927                         }
6928                 } else {
6929                         if (!test_and_set_bit(__I40E_DOWN, &vsi->state))
6930                                 i40e_down(vsi);
6931                         i40e_vsi_free_irq(vsi);
6932                         i40e_vsi_free_tx_resources(vsi);
6933                         i40e_vsi_free_rx_resources(vsi);
6934                 }
6935                 i40e_vsi_disable_irq(vsi);
6936         }
6937
6938         list_for_each_entry_safe(f, ftmp, &vsi->mac_filter_list, list)
6939                 i40e_del_filter(vsi, f->macaddr, f->vlan,
6940                                 f->is_vf, f->is_netdev);
6941         i40e_sync_vsi_filters(vsi);
6942
6943         i40e_vsi_delete(vsi);
6944         i40e_vsi_free_q_vectors(vsi);
6945         if (vsi->netdev) {
6946                 free_netdev(vsi->netdev);
6947                 vsi->netdev = NULL;
6948         }
6949         i40e_vsi_clear_rings(vsi);
6950         i40e_vsi_clear(vsi);
6951
6952         /* If this was the last thing on the VEB, except for the
6953          * controlling VSI, remove the VEB, which puts the controlling
6954          * VSI onto the next level down in the switch.
6955          *
6956          * Well, okay, there's one more exception here: don't remove
6957          * the orphan VEBs yet.  We'll wait for an explicit remove request
6958          * from up the network stack.
6959          */
6960         for (n = 0, i = 0; i < pf->hw.func_caps.num_vsis; i++) {
6961                 if (pf->vsi[i] &&
6962                     pf->vsi[i]->uplink_seid == uplink_seid &&
6963                     (pf->vsi[i]->flags & I40E_VSI_FLAG_VEB_OWNER) == 0) {
6964                         n++;      /* count the VSIs */
6965                 }
6966         }
6967         for (i = 0; i < I40E_MAX_VEB; i++) {
6968                 if (!pf->veb[i])
6969                         continue;
6970                 if (pf->veb[i]->uplink_seid == uplink_seid)
6971                         n++;     /* count the VEBs */
6972                 if (pf->veb[i]->seid == uplink_seid)
6973                         veb = pf->veb[i];
6974         }
6975         if (n == 0 && veb && veb->uplink_seid != 0)
6976                 i40e_veb_release(veb);
6977
6978         return 0;
6979 }
6980
6981 /**
6982  * i40e_vsi_setup_vectors - Set up the q_vectors for the given VSI
6983  * @vsi: ptr to the VSI
6984  *
6985  * This should only be called after i40e_vsi_mem_alloc() which allocates the
6986  * corresponding SW VSI structure and initializes num_queue_pairs for the
6987  * newly allocated VSI.
6988  *
6989  * Returns 0 on success or negative on failure
6990  **/
6991 static int i40e_vsi_setup_vectors(struct i40e_vsi *vsi)
6992 {
6993         int ret = -ENOENT;
6994         struct i40e_pf *pf = vsi->back;
6995
6996         if (vsi->q_vectors[0]) {
6997                 dev_info(&pf->pdev->dev, "VSI %d has existing q_vectors\n",
6998                          vsi->seid);
6999                 return -EEXIST;
7000         }
7001
7002         if (vsi->base_vector) {
7003                 dev_info(&pf->pdev->dev, "VSI %d has non-zero base vector %d\n",
7004                          vsi->seid, vsi->base_vector);
7005                 return -EEXIST;
7006         }
7007
7008         ret = i40e_alloc_q_vectors(vsi);
7009         if (ret) {
7010                 dev_info(&pf->pdev->dev,
7011                          "failed to allocate %d q_vector for VSI %d, ret=%d\n",
7012                          vsi->num_q_vectors, vsi->seid, ret);
7013                 vsi->num_q_vectors = 0;
7014                 goto vector_setup_out;
7015         }
7016
7017         if (vsi->num_q_vectors)
7018                 vsi->base_vector = i40e_get_lump(pf, pf->irq_pile,
7019                                                  vsi->num_q_vectors, vsi->idx);
7020         if (vsi->base_vector < 0) {
7021                 dev_info(&pf->pdev->dev,
7022                          "failed to get queue tracking for VSI %d, err=%d\n",
7023                          vsi->seid, vsi->base_vector);
7024                 i40e_vsi_free_q_vectors(vsi);
7025                 ret = -ENOENT;
7026                 goto vector_setup_out;
7027         }
7028
7029 vector_setup_out:
7030         return ret;
7031 }
7032
7033 /**
7034  * i40e_vsi_reinit_setup - return and reallocate resources for a VSI
7035  * @vsi: pointer to the vsi.
7036  *
7037  * This re-allocates a vsi's queue resources.
7038  *
7039  * Returns pointer to the successfully allocated and configured VSI sw struct
7040  * on success, otherwise returns NULL on failure.
7041  **/
7042 static struct i40e_vsi *i40e_vsi_reinit_setup(struct i40e_vsi *vsi)
7043 {
7044         struct i40e_pf *pf = vsi->back;
7045         u8 enabled_tc;
7046         int ret;
7047
7048         i40e_put_lump(pf->qp_pile, vsi->base_queue, vsi->idx);
7049         i40e_vsi_clear_rings(vsi);
7050
7051         i40e_vsi_free_arrays(vsi, false);
7052         i40e_set_num_rings_in_vsi(vsi);
7053         ret = i40e_vsi_alloc_arrays(vsi, false);
7054         if (ret)
7055                 goto err_vsi;
7056
7057         ret = i40e_get_lump(pf, pf->qp_pile, vsi->alloc_queue_pairs, vsi->idx);
7058         if (ret < 0) {
7059                 dev_info(&pf->pdev->dev, "VSI %d get_lump failed %d\n",
7060                          vsi->seid, ret);
7061                 goto err_vsi;
7062         }
7063         vsi->base_queue = ret;
7064
7065         /* Update the FW view of the VSI. Force a reset of TC and queue
7066          * layout configurations.
7067          */
7068         enabled_tc = pf->vsi[pf->lan_vsi]->tc_config.enabled_tc;
7069         pf->vsi[pf->lan_vsi]->tc_config.enabled_tc = 0;
7070         pf->vsi[pf->lan_vsi]->seid = pf->main_vsi_seid;
7071         i40e_vsi_config_tc(pf->vsi[pf->lan_vsi], enabled_tc);
7072
7073         /* assign it some queues */
7074         ret = i40e_alloc_rings(vsi);
7075         if (ret)
7076                 goto err_rings;
7077
7078         /* map all of the rings to the q_vectors */
7079         i40e_vsi_map_rings_to_vectors(vsi);
7080         return vsi;
7081
7082 err_rings:
7083         i40e_vsi_free_q_vectors(vsi);
7084         if (vsi->netdev_registered) {
7085                 vsi->netdev_registered = false;
7086                 unregister_netdev(vsi->netdev);
7087                 free_netdev(vsi->netdev);
7088                 vsi->netdev = NULL;
7089         }
7090         i40e_aq_delete_element(&pf->hw, vsi->seid, NULL);
7091 err_vsi:
7092         i40e_vsi_clear(vsi);
7093         return NULL;
7094 }
7095
7096 /**
7097  * i40e_vsi_setup - Set up a VSI by a given type
7098  * @pf: board private structure
7099  * @type: VSI type
7100  * @uplink_seid: the switch element to link to
7101  * @param1: usage depends upon VSI type. For VF types, indicates VF id
7102  *
7103  * This allocates the sw VSI structure and its queue resources, then add a VSI
7104  * to the identified VEB.
7105  *
7106  * Returns pointer to the successfully allocated and configure VSI sw struct on
7107  * success, otherwise returns NULL on failure.
7108  **/
7109 struct i40e_vsi *i40e_vsi_setup(struct i40e_pf *pf, u8 type,
7110                                 u16 uplink_seid, u32 param1)
7111 {
7112         struct i40e_vsi *vsi = NULL;
7113         struct i40e_veb *veb = NULL;
7114         int ret, i;
7115         int v_idx;
7116
7117         /* The requested uplink_seid must be either
7118          *     - the PF's port seid
7119          *              no VEB is needed because this is the PF
7120          *              or this is a Flow Director special case VSI
7121          *     - seid of an existing VEB
7122          *     - seid of a VSI that owns an existing VEB
7123          *     - seid of a VSI that doesn't own a VEB
7124          *              a new VEB is created and the VSI becomes the owner
7125          *     - seid of the PF VSI, which is what creates the first VEB
7126          *              this is a special case of the previous
7127          *
7128          * Find which uplink_seid we were given and create a new VEB if needed
7129          */
7130         for (i = 0; i < I40E_MAX_VEB; i++) {
7131                 if (pf->veb[i] && pf->veb[i]->seid == uplink_seid) {
7132                         veb = pf->veb[i];
7133                         break;
7134                 }
7135         }
7136
7137         if (!veb && uplink_seid != pf->mac_seid) {
7138
7139                 for (i = 0; i < pf->hw.func_caps.num_vsis; i++) {
7140                         if (pf->vsi[i] && pf->vsi[i]->seid == uplink_seid) {
7141                                 vsi = pf->vsi[i];
7142                                 break;
7143                         }
7144                 }
7145                 if (!vsi) {
7146                         dev_info(&pf->pdev->dev, "no such uplink_seid %d\n",
7147                                  uplink_seid);
7148                         return NULL;
7149                 }
7150
7151                 if (vsi->uplink_seid == pf->mac_seid)
7152                         veb = i40e_veb_setup(pf, 0, pf->mac_seid, vsi->seid,
7153                                              vsi->tc_config.enabled_tc);
7154                 else if ((vsi->flags & I40E_VSI_FLAG_VEB_OWNER) == 0)
7155                         veb = i40e_veb_setup(pf, 0, vsi->uplink_seid, vsi->seid,
7156                                              vsi->tc_config.enabled_tc);
7157
7158                 for (i = 0; i < I40E_MAX_VEB && !veb; i++) {
7159                         if (pf->veb[i] && pf->veb[i]->seid == vsi->uplink_seid)
7160                                 veb = pf->veb[i];
7161                 }
7162                 if (!veb) {
7163                         dev_info(&pf->pdev->dev, "couldn't add VEB\n");
7164                         return NULL;
7165                 }
7166
7167                 vsi->flags |= I40E_VSI_FLAG_VEB_OWNER;
7168                 uplink_seid = veb->seid;
7169         }
7170
7171         /* get vsi sw struct */
7172         v_idx = i40e_vsi_mem_alloc(pf, type);
7173         if (v_idx < 0)
7174                 goto err_alloc;
7175         vsi = pf->vsi[v_idx];
7176         if (!vsi)
7177                 goto err_alloc;
7178         vsi->type = type;
7179         vsi->veb_idx = (veb ? veb->idx : I40E_NO_VEB);
7180
7181         if (type == I40E_VSI_MAIN)
7182                 pf->lan_vsi = v_idx;
7183         else if (type == I40E_VSI_SRIOV)
7184                 vsi->vf_id = param1;
7185         /* assign it some queues */
7186         ret = i40e_get_lump(pf, pf->qp_pile, vsi->alloc_queue_pairs,
7187                                 vsi->idx);
7188         if (ret < 0) {
7189                 dev_info(&pf->pdev->dev, "VSI %d get_lump failed %d\n",
7190                          vsi->seid, ret);
7191                 goto err_vsi;
7192         }
7193         vsi->base_queue = ret;
7194
7195         /* get a VSI from the hardware */
7196         vsi->uplink_seid = uplink_seid;
7197         ret = i40e_add_vsi(vsi);
7198         if (ret)
7199                 goto err_vsi;
7200
7201         switch (vsi->type) {
7202         /* setup the netdev if needed */
7203         case I40E_VSI_MAIN:
7204         case I40E_VSI_VMDQ2:
7205                 ret = i40e_config_netdev(vsi);
7206                 if (ret)
7207                         goto err_netdev;
7208                 ret = register_netdev(vsi->netdev);
7209                 if (ret)
7210                         goto err_netdev;
7211                 vsi->netdev_registered = true;
7212                 netif_carrier_off(vsi->netdev);
7213 #ifdef CONFIG_I40E_DCB
7214                 /* Setup DCB netlink interface */
7215                 i40e_dcbnl_setup(vsi);
7216 #endif /* CONFIG_I40E_DCB */
7217                 /* fall through */
7218
7219         case I40E_VSI_FDIR:
7220                 /* set up vectors and rings if needed */
7221                 ret = i40e_vsi_setup_vectors(vsi);
7222                 if (ret)
7223                         goto err_msix;
7224
7225                 ret = i40e_alloc_rings(vsi);
7226                 if (ret)
7227                         goto err_rings;
7228
7229                 /* map all of the rings to the q_vectors */
7230                 i40e_vsi_map_rings_to_vectors(vsi);
7231
7232                 i40e_vsi_reset_stats(vsi);
7233                 break;
7234
7235         default:
7236                 /* no netdev or rings for the other VSI types */
7237                 break;
7238         }
7239
7240         return vsi;
7241
7242 err_rings:
7243         i40e_vsi_free_q_vectors(vsi);
7244 err_msix:
7245         if (vsi->netdev_registered) {
7246                 vsi->netdev_registered = false;
7247                 unregister_netdev(vsi->netdev);
7248                 free_netdev(vsi->netdev);
7249                 vsi->netdev = NULL;
7250         }
7251 err_netdev:
7252         i40e_aq_delete_element(&pf->hw, vsi->seid, NULL);
7253 err_vsi:
7254         i40e_vsi_clear(vsi);
7255 err_alloc:
7256         return NULL;
7257 }
7258
7259 /**
7260  * i40e_veb_get_bw_info - Query VEB BW information
7261  * @veb: the veb to query
7262  *
7263  * Query the Tx scheduler BW configuration data for given VEB
7264  **/
7265 static int i40e_veb_get_bw_info(struct i40e_veb *veb)
7266 {
7267         struct i40e_aqc_query_switching_comp_ets_config_resp ets_data;
7268         struct i40e_aqc_query_switching_comp_bw_config_resp bw_data;
7269         struct i40e_pf *pf = veb->pf;
7270         struct i40e_hw *hw = &pf->hw;
7271         u32 tc_bw_max;
7272         int ret = 0;
7273         int i;
7274
7275         ret = i40e_aq_query_switch_comp_bw_config(hw, veb->seid,
7276                                                   &bw_data, NULL);
7277         if (ret) {
7278                 dev_info(&pf->pdev->dev,
7279                          "query veb bw config failed, aq_err=%d\n",
7280                          hw->aq.asq_last_status);
7281                 goto out;
7282         }
7283
7284         ret = i40e_aq_query_switch_comp_ets_config(hw, veb->seid,
7285                                                    &ets_data, NULL);
7286         if (ret) {
7287                 dev_info(&pf->pdev->dev,
7288                          "query veb bw ets config failed, aq_err=%d\n",
7289                          hw->aq.asq_last_status);
7290                 goto out;
7291         }
7292
7293         veb->bw_limit = le16_to_cpu(ets_data.port_bw_limit);
7294         veb->bw_max_quanta = ets_data.tc_bw_max;
7295         veb->is_abs_credits = bw_data.absolute_credits_enable;
7296         tc_bw_max = le16_to_cpu(bw_data.tc_bw_max[0]) |
7297                     (le16_to_cpu(bw_data.tc_bw_max[1]) << 16);
7298         for (i = 0; i < I40E_MAX_TRAFFIC_CLASS; i++) {
7299                 veb->bw_tc_share_credits[i] = bw_data.tc_bw_share_credits[i];
7300                 veb->bw_tc_limit_credits[i] =
7301                                         le16_to_cpu(bw_data.tc_bw_limits[i]);
7302                 veb->bw_tc_max_quanta[i] = ((tc_bw_max >> (i*4)) & 0x7);
7303         }
7304
7305 out:
7306         return ret;
7307 }
7308
7309 /**
7310  * i40e_veb_mem_alloc - Allocates the next available struct veb in the PF
7311  * @pf: board private structure
7312  *
7313  * On error: returns error code (negative)
7314  * On success: returns vsi index in PF (positive)
7315  **/
7316 static int i40e_veb_mem_alloc(struct i40e_pf *pf)
7317 {
7318         int ret = -ENOENT;
7319         struct i40e_veb *veb;
7320         int i;
7321
7322         /* Need to protect the allocation of switch elements at the PF level */
7323         mutex_lock(&pf->switch_mutex);
7324
7325         /* VEB list may be fragmented if VEB creation/destruction has
7326          * been happening.  We can afford to do a quick scan to look
7327          * for any free slots in the list.
7328          *
7329          * find next empty veb slot, looping back around if necessary
7330          */
7331         i = 0;
7332         while ((i < I40E_MAX_VEB) && (pf->veb[i] != NULL))
7333                 i++;
7334         if (i >= I40E_MAX_VEB) {
7335                 ret = -ENOMEM;
7336                 goto err_alloc_veb;  /* out of VEB slots! */
7337         }
7338
7339         veb = kzalloc(sizeof(*veb), GFP_KERNEL);
7340         if (!veb) {
7341                 ret = -ENOMEM;
7342                 goto err_alloc_veb;
7343         }
7344         veb->pf = pf;
7345         veb->idx = i;
7346         veb->enabled_tc = 1;
7347
7348         pf->veb[i] = veb;
7349         ret = i;
7350 err_alloc_veb:
7351         mutex_unlock(&pf->switch_mutex);
7352         return ret;
7353 }
7354
7355 /**
7356  * i40e_switch_branch_release - Delete a branch of the switch tree
7357  * @branch: where to start deleting
7358  *
7359  * This uses recursion to find the tips of the branch to be
7360  * removed, deleting until we get back to and can delete this VEB.
7361  **/
7362 static void i40e_switch_branch_release(struct i40e_veb *branch)
7363 {
7364         struct i40e_pf *pf = branch->pf;
7365         u16 branch_seid = branch->seid;
7366         u16 veb_idx = branch->idx;
7367         int i;
7368
7369         /* release any VEBs on this VEB - RECURSION */
7370         for (i = 0; i < I40E_MAX_VEB; i++) {
7371                 if (!pf->veb[i])
7372                         continue;
7373                 if (pf->veb[i]->uplink_seid == branch->seid)
7374                         i40e_switch_branch_release(pf->veb[i]);
7375         }
7376
7377         /* Release the VSIs on this VEB, but not the owner VSI.
7378          *
7379          * NOTE: Removing the last VSI on a VEB has the SIDE EFFECT of removing
7380          *       the VEB itself, so don't use (*branch) after this loop.
7381          */
7382         for (i = 0; i < pf->hw.func_caps.num_vsis; i++) {
7383                 if (!pf->vsi[i])
7384                         continue;
7385                 if (pf->vsi[i]->uplink_seid == branch_seid &&
7386                    (pf->vsi[i]->flags & I40E_VSI_FLAG_VEB_OWNER) == 0) {
7387                         i40e_vsi_release(pf->vsi[i]);
7388                 }
7389         }
7390
7391         /* There's one corner case where the VEB might not have been
7392          * removed, so double check it here and remove it if needed.
7393          * This case happens if the veb was created from the debugfs
7394          * commands and no VSIs were added to it.
7395          */
7396         if (pf->veb[veb_idx])
7397                 i40e_veb_release(pf->veb[veb_idx]);
7398 }
7399
7400 /**
7401  * i40e_veb_clear - remove veb struct
7402  * @veb: the veb to remove
7403  **/
7404 static void i40e_veb_clear(struct i40e_veb *veb)
7405 {
7406         if (!veb)
7407                 return;
7408
7409         if (veb->pf) {
7410                 struct i40e_pf *pf = veb->pf;
7411
7412                 mutex_lock(&pf->switch_mutex);
7413                 if (pf->veb[veb->idx] == veb)
7414                         pf->veb[veb->idx] = NULL;
7415                 mutex_unlock(&pf->switch_mutex);
7416         }
7417
7418         kfree(veb);
7419 }
7420
7421 /**
7422  * i40e_veb_release - Delete a VEB and free its resources
7423  * @veb: the VEB being removed
7424  **/
7425 void i40e_veb_release(struct i40e_veb *veb)
7426 {
7427         struct i40e_vsi *vsi = NULL;
7428         struct i40e_pf *pf;
7429         int i, n = 0;
7430
7431         pf = veb->pf;
7432
7433         /* find the remaining VSI and check for extras */
7434         for (i = 0; i < pf->hw.func_caps.num_vsis; i++) {
7435                 if (pf->vsi[i] && pf->vsi[i]->uplink_seid == veb->seid) {
7436                         n++;
7437                         vsi = pf->vsi[i];
7438                 }
7439         }
7440         if (n != 1) {
7441                 dev_info(&pf->pdev->dev,
7442                          "can't remove VEB %d with %d VSIs left\n",
7443                          veb->seid, n);
7444                 return;
7445         }
7446
7447         /* move the remaining VSI to uplink veb */
7448         vsi->flags &= ~I40E_VSI_FLAG_VEB_OWNER;
7449         if (veb->uplink_seid) {
7450                 vsi->uplink_seid = veb->uplink_seid;
7451                 if (veb->uplink_seid == pf->mac_seid)
7452                         vsi->veb_idx = I40E_NO_VEB;
7453                 else
7454                         vsi->veb_idx = veb->veb_idx;
7455         } else {
7456                 /* floating VEB */
7457                 vsi->uplink_seid = pf->vsi[pf->lan_vsi]->uplink_seid;
7458                 vsi->veb_idx = pf->vsi[pf->lan_vsi]->veb_idx;
7459         }
7460
7461         i40e_aq_delete_element(&pf->hw, veb->seid, NULL);
7462         i40e_veb_clear(veb);
7463
7464         return;
7465 }
7466
7467 /**
7468  * i40e_add_veb - create the VEB in the switch
7469  * @veb: the VEB to be instantiated
7470  * @vsi: the controlling VSI
7471  **/
7472 static int i40e_add_veb(struct i40e_veb *veb, struct i40e_vsi *vsi)
7473 {
7474         bool is_default = false;
7475         bool is_cloud = false;
7476         int ret;
7477
7478         /* get a VEB from the hardware */
7479         ret = i40e_aq_add_veb(&veb->pf->hw, veb->uplink_seid, vsi->seid,
7480                               veb->enabled_tc, is_default,
7481                               is_cloud, &veb->seid, NULL);
7482         if (ret) {
7483                 dev_info(&veb->pf->pdev->dev,
7484                          "couldn't add VEB, err %d, aq_err %d\n",
7485                          ret, veb->pf->hw.aq.asq_last_status);
7486                 return -EPERM;
7487         }
7488
7489         /* get statistics counter */
7490         ret = i40e_aq_get_veb_parameters(&veb->pf->hw, veb->seid, NULL, NULL,
7491                                          &veb->stats_idx, NULL, NULL, NULL);
7492         if (ret) {
7493                 dev_info(&veb->pf->pdev->dev,
7494                          "couldn't get VEB statistics idx, err %d, aq_err %d\n",
7495                          ret, veb->pf->hw.aq.asq_last_status);
7496                 return -EPERM;
7497         }
7498         ret = i40e_veb_get_bw_info(veb);
7499         if (ret) {
7500                 dev_info(&veb->pf->pdev->dev,
7501                          "couldn't get VEB bw info, err %d, aq_err %d\n",
7502                          ret, veb->pf->hw.aq.asq_last_status);
7503                 i40e_aq_delete_element(&veb->pf->hw, veb->seid, NULL);
7504                 return -ENOENT;
7505         }
7506
7507         vsi->uplink_seid = veb->seid;
7508         vsi->veb_idx = veb->idx;
7509         vsi->flags |= I40E_VSI_FLAG_VEB_OWNER;
7510
7511         return 0;
7512 }
7513
7514 /**
7515  * i40e_veb_setup - Set up a VEB
7516  * @pf: board private structure
7517  * @flags: VEB setup flags
7518  * @uplink_seid: the switch element to link to
7519  * @vsi_seid: the initial VSI seid
7520  * @enabled_tc: Enabled TC bit-map
7521  *
7522  * This allocates the sw VEB structure and links it into the switch
7523  * It is possible and legal for this to be a duplicate of an already
7524  * existing VEB.  It is also possible for both uplink and vsi seids
7525  * to be zero, in order to create a floating VEB.
7526  *
7527  * Returns pointer to the successfully allocated VEB sw struct on
7528  * success, otherwise returns NULL on failure.
7529  **/
7530 struct i40e_veb *i40e_veb_setup(struct i40e_pf *pf, u16 flags,
7531                                 u16 uplink_seid, u16 vsi_seid,
7532                                 u8 enabled_tc)
7533 {
7534         struct i40e_veb *veb, *uplink_veb = NULL;
7535         int vsi_idx, veb_idx;
7536         int ret;
7537
7538         /* if one seid is 0, the other must be 0 to create a floating relay */
7539         if ((uplink_seid == 0 || vsi_seid == 0) &&
7540             (uplink_seid + vsi_seid != 0)) {
7541                 dev_info(&pf->pdev->dev,
7542                          "one, not both seid's are 0: uplink=%d vsi=%d\n",
7543                          uplink_seid, vsi_seid);
7544                 return NULL;
7545         }
7546
7547         /* make sure there is such a vsi and uplink */
7548         for (vsi_idx = 0; vsi_idx < pf->hw.func_caps.num_vsis; vsi_idx++)
7549                 if (pf->vsi[vsi_idx] && pf->vsi[vsi_idx]->seid == vsi_seid)
7550                         break;
7551         if (vsi_idx >= pf->hw.func_caps.num_vsis && vsi_seid != 0) {
7552                 dev_info(&pf->pdev->dev, "vsi seid %d not found\n",
7553                          vsi_seid);
7554                 return NULL;
7555         }
7556
7557         if (uplink_seid && uplink_seid != pf->mac_seid) {
7558                 for (veb_idx = 0; veb_idx < I40E_MAX_VEB; veb_idx++) {
7559                         if (pf->veb[veb_idx] &&
7560                             pf->veb[veb_idx]->seid == uplink_seid) {
7561                                 uplink_veb = pf->veb[veb_idx];
7562                                 break;
7563                         }
7564                 }
7565                 if (!uplink_veb) {
7566                         dev_info(&pf->pdev->dev,
7567                                  "uplink seid %d not found\n", uplink_seid);
7568                         return NULL;
7569                 }
7570         }
7571
7572         /* get veb sw struct */
7573         veb_idx = i40e_veb_mem_alloc(pf);
7574         if (veb_idx < 0)
7575                 goto err_alloc;
7576         veb = pf->veb[veb_idx];
7577         veb->flags = flags;
7578         veb->uplink_seid = uplink_seid;
7579         veb->veb_idx = (uplink_veb ? uplink_veb->idx : I40E_NO_VEB);
7580         veb->enabled_tc = (enabled_tc ? enabled_tc : 0x1);
7581
7582         /* create the VEB in the switch */
7583         ret = i40e_add_veb(veb, pf->vsi[vsi_idx]);
7584         if (ret)
7585                 goto err_veb;
7586
7587         return veb;
7588
7589 err_veb:
7590         i40e_veb_clear(veb);
7591 err_alloc:
7592         return NULL;
7593 }
7594
7595 /**
7596  * i40e_setup_pf_switch_element - set pf vars based on switch type
7597  * @pf: board private structure
7598  * @ele: element we are building info from
7599  * @num_reported: total number of elements
7600  * @printconfig: should we print the contents
7601  *
7602  * helper function to assist in extracting a few useful SEID values.
7603  **/
7604 static void i40e_setup_pf_switch_element(struct i40e_pf *pf,
7605                                 struct i40e_aqc_switch_config_element_resp *ele,
7606                                 u16 num_reported, bool printconfig)
7607 {
7608         u16 downlink_seid = le16_to_cpu(ele->downlink_seid);
7609         u16 uplink_seid = le16_to_cpu(ele->uplink_seid);
7610         u8 element_type = ele->element_type;
7611         u16 seid = le16_to_cpu(ele->seid);
7612
7613         if (printconfig)
7614                 dev_info(&pf->pdev->dev,
7615                          "type=%d seid=%d uplink=%d downlink=%d\n",
7616                          element_type, seid, uplink_seid, downlink_seid);
7617
7618         switch (element_type) {
7619         case I40E_SWITCH_ELEMENT_TYPE_MAC:
7620                 pf->mac_seid = seid;
7621                 break;
7622         case I40E_SWITCH_ELEMENT_TYPE_VEB:
7623                 /* Main VEB? */
7624                 if (uplink_seid != pf->mac_seid)
7625                         break;
7626                 if (pf->lan_veb == I40E_NO_VEB) {
7627                         int v;
7628
7629                         /* find existing or else empty VEB */
7630                         for (v = 0; v < I40E_MAX_VEB; v++) {
7631                                 if (pf->veb[v] && (pf->veb[v]->seid == seid)) {
7632                                         pf->lan_veb = v;
7633                                         break;
7634                                 }
7635                         }
7636                         if (pf->lan_veb == I40E_NO_VEB) {
7637                                 v = i40e_veb_mem_alloc(pf);
7638                                 if (v < 0)
7639                                         break;
7640                                 pf->lan_veb = v;
7641                         }
7642                 }
7643
7644                 pf->veb[pf->lan_veb]->seid = seid;
7645                 pf->veb[pf->lan_veb]->uplink_seid = pf->mac_seid;
7646                 pf->veb[pf->lan_veb]->pf = pf;
7647                 pf->veb[pf->lan_veb]->veb_idx = I40E_NO_VEB;
7648                 break;
7649         case I40E_SWITCH_ELEMENT_TYPE_VSI:
7650                 if (num_reported != 1)
7651                         break;
7652                 /* This is immediately after a reset so we can assume this is
7653                  * the PF's VSI
7654                  */
7655                 pf->mac_seid = uplink_seid;
7656                 pf->pf_seid = downlink_seid;
7657                 pf->main_vsi_seid = seid;
7658                 if (printconfig)
7659                         dev_info(&pf->pdev->dev,
7660                                  "pf_seid=%d main_vsi_seid=%d\n",
7661                                  pf->pf_seid, pf->main_vsi_seid);
7662                 break;
7663         case I40E_SWITCH_ELEMENT_TYPE_PF:
7664         case I40E_SWITCH_ELEMENT_TYPE_VF:
7665         case I40E_SWITCH_ELEMENT_TYPE_EMP:
7666         case I40E_SWITCH_ELEMENT_TYPE_BMC:
7667         case I40E_SWITCH_ELEMENT_TYPE_PE:
7668         case I40E_SWITCH_ELEMENT_TYPE_PA:
7669                 /* ignore these for now */
7670                 break;
7671         default:
7672                 dev_info(&pf->pdev->dev, "unknown element type=%d seid=%d\n",
7673                          element_type, seid);
7674                 break;
7675         }
7676 }
7677
7678 /**
7679  * i40e_fetch_switch_configuration - Get switch config from firmware
7680  * @pf: board private structure
7681  * @printconfig: should we print the contents
7682  *
7683  * Get the current switch configuration from the device and
7684  * extract a few useful SEID values.
7685  **/
7686 int i40e_fetch_switch_configuration(struct i40e_pf *pf, bool printconfig)
7687 {
7688         struct i40e_aqc_get_switch_config_resp *sw_config;
7689         u16 next_seid = 0;
7690         int ret = 0;
7691         u8 *aq_buf;
7692         int i;
7693
7694         aq_buf = kzalloc(I40E_AQ_LARGE_BUF, GFP_KERNEL);
7695         if (!aq_buf)
7696                 return -ENOMEM;
7697
7698         sw_config = (struct i40e_aqc_get_switch_config_resp *)aq_buf;
7699         do {
7700                 u16 num_reported, num_total;
7701
7702                 ret = i40e_aq_get_switch_config(&pf->hw, sw_config,
7703                                                 I40E_AQ_LARGE_BUF,
7704                                                 &next_seid, NULL);
7705                 if (ret) {
7706                         dev_info(&pf->pdev->dev,
7707                                  "get switch config failed %d aq_err=%x\n",
7708                                  ret, pf->hw.aq.asq_last_status);
7709                         kfree(aq_buf);
7710                         return -ENOENT;
7711                 }
7712
7713                 num_reported = le16_to_cpu(sw_config->header.num_reported);
7714                 num_total = le16_to_cpu(sw_config->header.num_total);
7715
7716                 if (printconfig)
7717                         dev_info(&pf->pdev->dev,
7718                                  "header: %d reported %d total\n",
7719                                  num_reported, num_total);
7720
7721                 if (num_reported) {
7722                         int sz = sizeof(*sw_config) * num_reported;
7723
7724                         kfree(pf->sw_config);
7725                         pf->sw_config = kzalloc(sz, GFP_KERNEL);
7726                         if (pf->sw_config)
7727                                 memcpy(pf->sw_config, sw_config, sz);
7728                 }
7729
7730                 for (i = 0; i < num_reported; i++) {
7731                         struct i40e_aqc_switch_config_element_resp *ele =
7732                                 &sw_config->element[i];
7733
7734                         i40e_setup_pf_switch_element(pf, ele, num_reported,
7735                                                      printconfig);
7736                 }
7737         } while (next_seid != 0);
7738
7739         kfree(aq_buf);
7740         return ret;
7741 }
7742
7743 /**
7744  * i40e_setup_pf_switch - Setup the HW switch on startup or after reset
7745  * @pf: board private structure
7746  * @reinit: if the Main VSI needs to re-initialized.
7747  *
7748  * Returns 0 on success, negative value on failure
7749  **/
7750 static int i40e_setup_pf_switch(struct i40e_pf *pf, bool reinit)
7751 {
7752         u32 rxfc = 0, txfc = 0, rxfc_reg;
7753         int ret;
7754
7755         /* find out what's out there already */
7756         ret = i40e_fetch_switch_configuration(pf, false);
7757         if (ret) {
7758                 dev_info(&pf->pdev->dev,
7759                          "couldn't fetch switch config, err %d, aq_err %d\n",
7760                          ret, pf->hw.aq.asq_last_status);
7761                 return ret;
7762         }
7763         i40e_pf_reset_stats(pf);
7764
7765         /* first time setup */
7766         if (pf->lan_vsi == I40E_NO_VSI || reinit) {
7767                 struct i40e_vsi *vsi = NULL;
7768                 u16 uplink_seid;
7769
7770                 /* Set up the PF VSI associated with the PF's main VSI
7771                  * that is already in the HW switch
7772                  */
7773                 if (pf->lan_veb != I40E_NO_VEB && pf->veb[pf->lan_veb])
7774                         uplink_seid = pf->veb[pf->lan_veb]->seid;
7775                 else
7776                         uplink_seid = pf->mac_seid;
7777                 if (pf->lan_vsi == I40E_NO_VSI)
7778                         vsi = i40e_vsi_setup(pf, I40E_VSI_MAIN, uplink_seid, 0);
7779                 else if (reinit)
7780                         vsi = i40e_vsi_reinit_setup(pf->vsi[pf->lan_vsi]);
7781                 if (!vsi) {
7782                         dev_info(&pf->pdev->dev, "setup of MAIN VSI failed\n");
7783                         i40e_fdir_teardown(pf);
7784                         return -EAGAIN;
7785                 }
7786         } else {
7787                 /* force a reset of TC and queue layout configurations */
7788                 u8 enabled_tc = pf->vsi[pf->lan_vsi]->tc_config.enabled_tc;
7789                 pf->vsi[pf->lan_vsi]->tc_config.enabled_tc = 0;
7790                 pf->vsi[pf->lan_vsi]->seid = pf->main_vsi_seid;
7791                 i40e_vsi_config_tc(pf->vsi[pf->lan_vsi], enabled_tc);
7792         }
7793         i40e_vlan_stripping_disable(pf->vsi[pf->lan_vsi]);
7794
7795         i40e_fdir_sb_setup(pf);
7796
7797         /* Setup static PF queue filter control settings */
7798         ret = i40e_setup_pf_filter_control(pf);
7799         if (ret) {
7800                 dev_info(&pf->pdev->dev, "setup_pf_filter_control failed: %d\n",
7801                          ret);
7802                 /* Failure here should not stop continuing other steps */
7803         }
7804
7805         /* enable RSS in the HW, even for only one queue, as the stack can use
7806          * the hash
7807          */
7808         if ((pf->flags & I40E_FLAG_RSS_ENABLED))
7809                 i40e_config_rss(pf);
7810
7811         /* fill in link information and enable LSE reporting */
7812         i40e_aq_get_link_info(&pf->hw, true, NULL, NULL);
7813         i40e_link_event(pf);
7814
7815         /* Initialize user-specific link properties */
7816         pf->fc_autoneg_status = ((pf->hw.phy.link_info.an_info &
7817                                   I40E_AQ_AN_COMPLETED) ? true : false);
7818         /* requested_mode is set in probe or by ethtool */
7819         if (!pf->fc_autoneg_status)
7820                 goto no_autoneg;
7821
7822         if ((pf->hw.phy.link_info.an_info & I40E_AQ_LINK_PAUSE_TX) &&
7823             (pf->hw.phy.link_info.an_info & I40E_AQ_LINK_PAUSE_RX))
7824                 pf->hw.fc.current_mode = I40E_FC_FULL;
7825         else if (pf->hw.phy.link_info.an_info & I40E_AQ_LINK_PAUSE_TX)
7826                 pf->hw.fc.current_mode = I40E_FC_TX_PAUSE;
7827         else if (pf->hw.phy.link_info.an_info & I40E_AQ_LINK_PAUSE_RX)
7828                 pf->hw.fc.current_mode = I40E_FC_RX_PAUSE;
7829         else
7830                 pf->hw.fc.current_mode = I40E_FC_NONE;
7831
7832         /* sync the flow control settings with the auto-neg values */
7833         switch (pf->hw.fc.current_mode) {
7834         case I40E_FC_FULL:
7835                 txfc = 1;
7836                 rxfc = 1;
7837                 break;
7838         case I40E_FC_TX_PAUSE:
7839                 txfc = 1;
7840                 rxfc = 0;
7841                 break;
7842         case I40E_FC_RX_PAUSE:
7843                 txfc = 0;
7844                 rxfc = 1;
7845                 break;
7846         case I40E_FC_NONE:
7847         case I40E_FC_DEFAULT:
7848                 txfc = 0;
7849                 rxfc = 0;
7850                 break;
7851         case I40E_FC_PFC:
7852                 /* TBD */
7853                 break;
7854         /* no default case, we have to handle all possibilities here */
7855         }
7856
7857         wr32(&pf->hw, I40E_PRTDCB_FCCFG, txfc << I40E_PRTDCB_FCCFG_TFCE_SHIFT);
7858
7859         rxfc_reg = rd32(&pf->hw, I40E_PRTDCB_MFLCN) &
7860                    ~I40E_PRTDCB_MFLCN_RFCE_MASK;
7861         rxfc_reg |= (rxfc << I40E_PRTDCB_MFLCN_RFCE_SHIFT);
7862
7863         wr32(&pf->hw, I40E_PRTDCB_MFLCN, rxfc_reg);
7864
7865         goto fc_complete;
7866
7867 no_autoneg:
7868         /* disable L2 flow control, user can turn it on if they wish */
7869         wr32(&pf->hw, I40E_PRTDCB_FCCFG, 0);
7870         wr32(&pf->hw, I40E_PRTDCB_MFLCN, rd32(&pf->hw, I40E_PRTDCB_MFLCN) &
7871                                          ~I40E_PRTDCB_MFLCN_RFCE_MASK);
7872
7873 fc_complete:
7874         i40e_ptp_init(pf);
7875
7876         return ret;
7877 }
7878
7879 /**
7880  * i40e_determine_queue_usage - Work out queue distribution
7881  * @pf: board private structure
7882  **/
7883 static void i40e_determine_queue_usage(struct i40e_pf *pf)
7884 {
7885         int queues_left;
7886
7887         pf->num_lan_qps = 0;
7888
7889         /* Find the max queues to be put into basic use.  We'll always be
7890          * using TC0, whether or not DCB is running, and TC0 will get the
7891          * big RSS set.
7892          */
7893         queues_left = pf->hw.func_caps.num_tx_qp;
7894
7895         if ((queues_left == 1) ||
7896             !(pf->flags & I40E_FLAG_MSIX_ENABLED) ||
7897             !(pf->flags & (I40E_FLAG_RSS_ENABLED | I40E_FLAG_FD_SB_ENABLED |
7898                            I40E_FLAG_DCB_ENABLED))) {
7899                 /* one qp for PF, no queues for anything else */
7900                 queues_left = 0;
7901                 pf->rss_size = pf->num_lan_qps = 1;
7902
7903                 /* make sure all the fancies are disabled */
7904                 pf->flags &= ~(I40E_FLAG_RSS_ENABLED    |
7905                                I40E_FLAG_FD_SB_ENABLED  |
7906                                I40E_FLAG_FD_ATR_ENABLED |
7907                                I40E_FLAG_DCB_ENABLED    |
7908                                I40E_FLAG_SRIOV_ENABLED  |
7909                                I40E_FLAG_VMDQ_ENABLED);
7910         } else {
7911                 /* Not enough queues for all TCs */
7912                 if ((pf->flags & I40E_FLAG_DCB_ENABLED) &&
7913                     (queues_left < I40E_MAX_TRAFFIC_CLASS)) {
7914                         pf->flags &= ~I40E_FLAG_DCB_ENABLED;
7915                         dev_info(&pf->pdev->dev, "not enough queues for DCB. DCB is disabled.\n");
7916                 }
7917                 pf->num_lan_qps = pf->rss_size_max;
7918                 queues_left -= pf->num_lan_qps;
7919         }
7920
7921         if (pf->flags & I40E_FLAG_FD_SB_ENABLED) {
7922                 if (queues_left > 1) {
7923                         queues_left -= 1; /* save 1 queue for FD */
7924                 } else {
7925                         pf->flags &= ~I40E_FLAG_FD_SB_ENABLED;
7926                         dev_info(&pf->pdev->dev, "not enough queues for Flow Director. Flow Director feature is disabled\n");
7927                 }
7928         }
7929
7930         if ((pf->flags & I40E_FLAG_SRIOV_ENABLED) &&
7931             pf->num_vf_qps && pf->num_req_vfs && queues_left) {
7932                 pf->num_req_vfs = min_t(int, pf->num_req_vfs,
7933                                         (queues_left / pf->num_vf_qps));
7934                 queues_left -= (pf->num_req_vfs * pf->num_vf_qps);
7935         }
7936
7937         if ((pf->flags & I40E_FLAG_VMDQ_ENABLED) &&
7938             pf->num_vmdq_vsis && pf->num_vmdq_qps && queues_left) {
7939                 pf->num_vmdq_vsis = min_t(int, pf->num_vmdq_vsis,
7940                                           (queues_left / pf->num_vmdq_qps));
7941                 queues_left -= (pf->num_vmdq_vsis * pf->num_vmdq_qps);
7942         }
7943
7944         pf->queues_left = queues_left;
7945         return;
7946 }
7947
7948 /**
7949  * i40e_setup_pf_filter_control - Setup PF static filter control
7950  * @pf: PF to be setup
7951  *
7952  * i40e_setup_pf_filter_control sets up a pf's initial filter control
7953  * settings. If PE/FCoE are enabled then it will also set the per PF
7954  * based filter sizes required for them. It also enables Flow director,
7955  * ethertype and macvlan type filter settings for the pf.
7956  *
7957  * Returns 0 on success, negative on failure
7958  **/
7959 static int i40e_setup_pf_filter_control(struct i40e_pf *pf)
7960 {
7961         struct i40e_filter_control_settings *settings = &pf->filter_settings;
7962
7963         settings->hash_lut_size = I40E_HASH_LUT_SIZE_128;
7964
7965         /* Flow Director is enabled */
7966         if (pf->flags & (I40E_FLAG_FD_SB_ENABLED | I40E_FLAG_FD_ATR_ENABLED))
7967                 settings->enable_fdir = true;
7968
7969         /* Ethtype and MACVLAN filters enabled for PF */
7970         settings->enable_ethtype = true;
7971         settings->enable_macvlan = true;
7972
7973         if (i40e_set_filter_control(&pf->hw, settings))
7974                 return -ENOENT;
7975
7976         return 0;
7977 }
7978
7979 #define INFO_STRING_LEN 255
7980 static void i40e_print_features(struct i40e_pf *pf)
7981 {
7982         struct i40e_hw *hw = &pf->hw;
7983         char *buf, *string;
7984
7985         string = kzalloc(INFO_STRING_LEN, GFP_KERNEL);
7986         if (!string) {
7987                 dev_err(&pf->pdev->dev, "Features string allocation failed\n");
7988                 return;
7989         }
7990
7991         buf = string;
7992
7993         buf += sprintf(string, "Features: PF-id[%d] ", hw->pf_id);
7994 #ifdef CONFIG_PCI_IOV
7995         buf += sprintf(buf, "VFs: %d ", pf->num_req_vfs);
7996 #endif
7997         buf += sprintf(buf, "VSIs: %d QP: %d ", pf->hw.func_caps.num_vsis,
7998                        pf->vsi[pf->lan_vsi]->num_queue_pairs);
7999
8000         if (pf->flags & I40E_FLAG_RSS_ENABLED)
8001                 buf += sprintf(buf, "RSS ");
8002         buf += sprintf(buf, "FDir ");
8003         if (pf->flags & I40E_FLAG_FD_ATR_ENABLED)
8004                 buf += sprintf(buf, "ATR ");
8005         if (pf->flags & I40E_FLAG_FD_SB_ENABLED)
8006                 buf += sprintf(buf, "NTUPLE ");
8007         if (pf->flags & I40E_FLAG_DCB_ENABLED)
8008                 buf += sprintf(buf, "DCB ");
8009         if (pf->flags & I40E_FLAG_PTP)
8010                 buf += sprintf(buf, "PTP ");
8011
8012         BUG_ON(buf > (string + INFO_STRING_LEN));
8013         dev_info(&pf->pdev->dev, "%s\n", string);
8014         kfree(string);
8015 }
8016
8017 /**
8018  * i40e_probe - Device initialization routine
8019  * @pdev: PCI device information struct
8020  * @ent: entry in i40e_pci_tbl
8021  *
8022  * i40e_probe initializes a pf identified by a pci_dev structure.
8023  * The OS initialization, configuring of the pf private structure,
8024  * and a hardware reset occur.
8025  *
8026  * Returns 0 on success, negative on failure
8027  **/
8028 static int i40e_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
8029 {
8030         struct i40e_driver_version dv;
8031         struct i40e_pf *pf;
8032         struct i40e_hw *hw;
8033         static u16 pfs_found;
8034         u16 link_status;
8035         int err = 0;
8036         u32 len;
8037
8038         err = pci_enable_device_mem(pdev);
8039         if (err)
8040                 return err;
8041
8042         /* set up for high or low dma */
8043         err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
8044         if (err)
8045                 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
8046         if (err) {
8047                 dev_err(&pdev->dev,
8048                         "DMA configuration failed: 0x%x\n", err);
8049                 goto err_dma;
8050         }
8051
8052         /* set up pci connections */
8053         err = pci_request_selected_regions(pdev, pci_select_bars(pdev,
8054                                            IORESOURCE_MEM), i40e_driver_name);
8055         if (err) {
8056                 dev_info(&pdev->dev,
8057                          "pci_request_selected_regions failed %d\n", err);
8058                 goto err_pci_reg;
8059         }
8060
8061         pci_enable_pcie_error_reporting(pdev);
8062         pci_set_master(pdev);
8063
8064         /* Now that we have a PCI connection, we need to do the
8065          * low level device setup.  This is primarily setting up
8066          * the Admin Queue structures and then querying for the
8067          * device's current profile information.
8068          */
8069         pf = kzalloc(sizeof(*pf), GFP_KERNEL);
8070         if (!pf) {
8071                 err = -ENOMEM;
8072                 goto err_pf_alloc;
8073         }
8074         pf->next_vsi = 0;
8075         pf->pdev = pdev;
8076         set_bit(__I40E_DOWN, &pf->state);
8077
8078         hw = &pf->hw;
8079         hw->back = pf;
8080         hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
8081                               pci_resource_len(pdev, 0));
8082         if (!hw->hw_addr) {
8083                 err = -EIO;
8084                 dev_info(&pdev->dev, "ioremap(0x%04x, 0x%04x) failed: 0x%x\n",
8085                          (unsigned int)pci_resource_start(pdev, 0),
8086                          (unsigned int)pci_resource_len(pdev, 0), err);
8087                 goto err_ioremap;
8088         }
8089         hw->vendor_id = pdev->vendor;
8090         hw->device_id = pdev->device;
8091         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
8092         hw->subsystem_vendor_id = pdev->subsystem_vendor;
8093         hw->subsystem_device_id = pdev->subsystem_device;
8094         hw->bus.device = PCI_SLOT(pdev->devfn);
8095         hw->bus.func = PCI_FUNC(pdev->devfn);
8096         pf->instance = pfs_found;
8097
8098         /* do a special CORER for clearing PXE mode once at init */
8099         if (hw->revision_id == 0 &&
8100             (rd32(hw, I40E_GLLAN_RCTL_0) & I40E_GLLAN_RCTL_0_PXE_MODE_MASK)) {
8101                 wr32(hw, I40E_GLGEN_RTRIG, I40E_GLGEN_RTRIG_CORER_MASK);
8102                 i40e_flush(hw);
8103                 msleep(200);
8104                 pf->corer_count++;
8105
8106                 i40e_clear_pxe_mode(hw);
8107         }
8108
8109         /* Reset here to make sure all is clean and to define PF 'n' */
8110         err = i40e_pf_reset(hw);
8111         if (err) {
8112                 dev_info(&pdev->dev, "Initial pf_reset failed: %d\n", err);
8113                 goto err_pf_reset;
8114         }
8115         pf->pfr_count++;
8116
8117         hw->aq.num_arq_entries = I40E_AQ_LEN;
8118         hw->aq.num_asq_entries = I40E_AQ_LEN;
8119         hw->aq.arq_buf_size = I40E_MAX_AQ_BUF_SIZE;
8120         hw->aq.asq_buf_size = I40E_MAX_AQ_BUF_SIZE;
8121         pf->adminq_work_limit = I40E_AQ_WORK_LIMIT;
8122         snprintf(pf->misc_int_name, sizeof(pf->misc_int_name) - 1,
8123                  "%s-pf%d:misc",
8124                  dev_driver_string(&pf->pdev->dev), pf->hw.pf_id);
8125
8126         err = i40e_init_shared_code(hw);
8127         if (err) {
8128                 dev_info(&pdev->dev, "init_shared_code failed: %d\n", err);
8129                 goto err_pf_reset;
8130         }
8131
8132         /* set up a default setting for link flow control */
8133         pf->hw.fc.requested_mode = I40E_FC_NONE;
8134
8135         err = i40e_init_adminq(hw);
8136         dev_info(&pdev->dev, "%s\n", i40e_fw_version_str(hw));
8137         if (err) {
8138                 dev_info(&pdev->dev,
8139                          "init_adminq failed: %d expecting API %02x.%02x\n",
8140                          err,
8141                          I40E_FW_API_VERSION_MAJOR, I40E_FW_API_VERSION_MINOR);
8142                 goto err_pf_reset;
8143         }
8144
8145         i40e_clear_pxe_mode(hw);
8146         err = i40e_get_capabilities(pf);
8147         if (err)
8148                 goto err_adminq_setup;
8149
8150         err = i40e_sw_init(pf);
8151         if (err) {
8152                 dev_info(&pdev->dev, "sw_init failed: %d\n", err);
8153                 goto err_sw_init;
8154         }
8155
8156         err = i40e_init_lan_hmc(hw, hw->func_caps.num_tx_qp,
8157                                 hw->func_caps.num_rx_qp,
8158                                 pf->fcoe_hmc_cntx_num, pf->fcoe_hmc_filt_num);
8159         if (err) {
8160                 dev_info(&pdev->dev, "init_lan_hmc failed: %d\n", err);
8161                 goto err_init_lan_hmc;
8162         }
8163
8164         err = i40e_configure_lan_hmc(hw, I40E_HMC_MODEL_DIRECT_ONLY);
8165         if (err) {
8166                 dev_info(&pdev->dev, "configure_lan_hmc failed: %d\n", err);
8167                 err = -ENOENT;
8168                 goto err_configure_lan_hmc;
8169         }
8170
8171         i40e_get_mac_addr(hw, hw->mac.addr);
8172         if (!is_valid_ether_addr(hw->mac.addr)) {
8173                 dev_info(&pdev->dev, "invalid MAC address %pM\n", hw->mac.addr);
8174                 err = -EIO;
8175                 goto err_mac_addr;
8176         }
8177         dev_info(&pdev->dev, "MAC address: %pM\n", hw->mac.addr);
8178         memcpy(hw->mac.perm_addr, hw->mac.addr, ETH_ALEN);
8179
8180         pci_set_drvdata(pdev, pf);
8181         pci_save_state(pdev);
8182 #ifdef CONFIG_I40E_DCB
8183         err = i40e_init_pf_dcb(pf);
8184         if (err) {
8185                 dev_info(&pdev->dev, "init_pf_dcb failed: %d\n", err);
8186                 pf->flags &= ~I40E_FLAG_DCB_ENABLED;
8187                 goto err_init_dcb;
8188         }
8189 #endif /* CONFIG_I40E_DCB */
8190
8191         /* set up periodic task facility */
8192         setup_timer(&pf->service_timer, i40e_service_timer, (unsigned long)pf);
8193         pf->service_timer_period = HZ;
8194
8195         INIT_WORK(&pf->service_task, i40e_service_task);
8196         clear_bit(__I40E_SERVICE_SCHED, &pf->state);
8197         pf->flags |= I40E_FLAG_NEED_LINK_UPDATE;
8198         pf->link_check_timeout = jiffies;
8199
8200         /* WoL defaults to disabled */
8201         pf->wol_en = false;
8202         device_set_wakeup_enable(&pf->pdev->dev, pf->wol_en);
8203
8204         /* set up the main switch operations */
8205         i40e_determine_queue_usage(pf);
8206         i40e_init_interrupt_scheme(pf);
8207
8208         /* Set up the *vsi struct based on the number of VSIs in the HW,
8209          * and set up our local tracking of the MAIN PF vsi.
8210          */
8211         len = sizeof(struct i40e_vsi *) * pf->hw.func_caps.num_vsis;
8212         pf->vsi = kzalloc(len, GFP_KERNEL);
8213         if (!pf->vsi) {
8214                 err = -ENOMEM;
8215                 goto err_switch_setup;
8216         }
8217
8218         err = i40e_setup_pf_switch(pf, false);
8219         if (err) {
8220                 dev_info(&pdev->dev, "setup_pf_switch failed: %d\n", err);
8221                 goto err_vsis;
8222         }
8223
8224         /* The main driver is (mostly) up and happy. We need to set this state
8225          * before setting up the misc vector or we get a race and the vector
8226          * ends up disabled forever.
8227          */
8228         clear_bit(__I40E_DOWN, &pf->state);
8229
8230         /* In case of MSIX we are going to setup the misc vector right here
8231          * to handle admin queue events etc. In case of legacy and MSI
8232          * the misc functionality and queue processing is combined in
8233          * the same vector and that gets setup at open.
8234          */
8235         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
8236                 err = i40e_setup_misc_vector(pf);
8237                 if (err) {
8238                         dev_info(&pdev->dev,
8239                                  "setup of misc vector failed: %d\n", err);
8240                         goto err_vsis;
8241                 }
8242         }
8243
8244         /* prep for VF support */
8245         if ((pf->flags & I40E_FLAG_SRIOV_ENABLED) &&
8246             (pf->flags & I40E_FLAG_MSIX_ENABLED)) {
8247                 u32 val;
8248
8249                 /* disable link interrupts for VFs */
8250                 val = rd32(hw, I40E_PFGEN_PORTMDIO_NUM);
8251                 val &= ~I40E_PFGEN_PORTMDIO_NUM_VFLINK_STAT_ENA_MASK;
8252                 wr32(hw, I40E_PFGEN_PORTMDIO_NUM, val);
8253                 i40e_flush(hw);
8254
8255                 if (pci_num_vf(pdev)) {
8256                         dev_info(&pdev->dev,
8257                                  "Active VFs found, allocating resources.\n");
8258                         err = i40e_alloc_vfs(pf, pci_num_vf(pdev));
8259                         if (err)
8260                                 dev_info(&pdev->dev,
8261                                          "Error %d allocating resources for existing VFs\n",
8262                                          err);
8263                 }
8264         }
8265
8266         pfs_found++;
8267
8268         i40e_dbg_pf_init(pf);
8269
8270         /* tell the firmware that we're starting */
8271         dv.major_version = DRV_VERSION_MAJOR;
8272         dv.minor_version = DRV_VERSION_MINOR;
8273         dv.build_version = DRV_VERSION_BUILD;
8274         dv.subbuild_version = 0;
8275         i40e_aq_send_driver_version(&pf->hw, &dv, NULL);
8276
8277         /* since everything's happy, start the service_task timer */
8278         mod_timer(&pf->service_timer,
8279                   round_jiffies(jiffies + pf->service_timer_period));
8280
8281         /* Get the negotiated link width and speed from PCI config space */
8282         pcie_capability_read_word(pf->pdev, PCI_EXP_LNKSTA, &link_status);
8283
8284         i40e_set_pci_config_data(hw, link_status);
8285
8286         dev_info(&pdev->dev, "PCI-Express: %s %s\n",
8287                 (hw->bus.speed == i40e_bus_speed_8000 ? "Speed 8.0GT/s" :
8288                  hw->bus.speed == i40e_bus_speed_5000 ? "Speed 5.0GT/s" :
8289                  hw->bus.speed == i40e_bus_speed_2500 ? "Speed 2.5GT/s" :
8290                  "Unknown"),
8291                 (hw->bus.width == i40e_bus_width_pcie_x8 ? "Width x8" :
8292                  hw->bus.width == i40e_bus_width_pcie_x4 ? "Width x4" :
8293                  hw->bus.width == i40e_bus_width_pcie_x2 ? "Width x2" :
8294                  hw->bus.width == i40e_bus_width_pcie_x1 ? "Width x1" :
8295                  "Unknown"));
8296
8297         if (hw->bus.width < i40e_bus_width_pcie_x8 ||
8298             hw->bus.speed < i40e_bus_speed_8000) {
8299                 dev_warn(&pdev->dev, "PCI-Express bandwidth available for this device may be insufficient for optimal performance.\n");
8300                 dev_warn(&pdev->dev, "Please move the device to a different PCI-e link with more lanes and/or higher transfer rate.\n");
8301         }
8302
8303         /* print a string summarizing features */
8304         i40e_print_features(pf);
8305
8306         return 0;
8307
8308         /* Unwind what we've done if something failed in the setup */
8309 err_vsis:
8310         set_bit(__I40E_DOWN, &pf->state);
8311         i40e_clear_interrupt_scheme(pf);
8312         kfree(pf->vsi);
8313 err_switch_setup:
8314         i40e_reset_interrupt_capability(pf);
8315         del_timer_sync(&pf->service_timer);
8316 #ifdef CONFIG_I40E_DCB
8317 err_init_dcb:
8318 #endif /* CONFIG_I40E_DCB */
8319 err_mac_addr:
8320 err_configure_lan_hmc:
8321         (void)i40e_shutdown_lan_hmc(hw);
8322 err_init_lan_hmc:
8323         kfree(pf->qp_pile);
8324         kfree(pf->irq_pile);
8325 err_sw_init:
8326 err_adminq_setup:
8327         (void)i40e_shutdown_adminq(hw);
8328 err_pf_reset:
8329         iounmap(hw->hw_addr);
8330 err_ioremap:
8331         kfree(pf);
8332 err_pf_alloc:
8333         pci_disable_pcie_error_reporting(pdev);
8334         pci_release_selected_regions(pdev,
8335                                      pci_select_bars(pdev, IORESOURCE_MEM));
8336 err_pci_reg:
8337 err_dma:
8338         pci_disable_device(pdev);
8339         return err;
8340 }
8341
8342 /**
8343  * i40e_remove - Device removal routine
8344  * @pdev: PCI device information struct
8345  *
8346  * i40e_remove is called by the PCI subsystem to alert the driver
8347  * that is should release a PCI device.  This could be caused by a
8348  * Hot-Plug event, or because the driver is going to be removed from
8349  * memory.
8350  **/
8351 static void i40e_remove(struct pci_dev *pdev)
8352 {
8353         struct i40e_pf *pf = pci_get_drvdata(pdev);
8354         i40e_status ret_code;
8355         u32 reg;
8356         int i;
8357
8358         i40e_dbg_pf_exit(pf);
8359
8360         i40e_ptp_stop(pf);
8361
8362         /* no more scheduling of any task */
8363         set_bit(__I40E_DOWN, &pf->state);
8364         del_timer_sync(&pf->service_timer);
8365         cancel_work_sync(&pf->service_task);
8366
8367         if (pf->flags & I40E_FLAG_SRIOV_ENABLED) {
8368                 i40e_free_vfs(pf);
8369                 pf->flags &= ~I40E_FLAG_SRIOV_ENABLED;
8370         }
8371
8372         i40e_fdir_teardown(pf);
8373
8374         /* If there is a switch structure or any orphans, remove them.
8375          * This will leave only the PF's VSI remaining.
8376          */
8377         for (i = 0; i < I40E_MAX_VEB; i++) {
8378                 if (!pf->veb[i])
8379                         continue;
8380
8381                 if (pf->veb[i]->uplink_seid == pf->mac_seid ||
8382                     pf->veb[i]->uplink_seid == 0)
8383                         i40e_switch_branch_release(pf->veb[i]);
8384         }
8385
8386         /* Now we can shutdown the PF's VSI, just before we kill
8387          * adminq and hmc.
8388          */
8389         if (pf->vsi[pf->lan_vsi])
8390                 i40e_vsi_release(pf->vsi[pf->lan_vsi]);
8391
8392         i40e_stop_misc_vector(pf);
8393         if (pf->flags & I40E_FLAG_MSIX_ENABLED) {
8394                 synchronize_irq(pf->msix_entries[0].vector);
8395                 free_irq(pf->msix_entries[0].vector, pf);
8396         }
8397
8398         /* shutdown and destroy the HMC */
8399         ret_code = i40e_shutdown_lan_hmc(&pf->hw);
8400         if (ret_code)
8401                 dev_warn(&pdev->dev,
8402                          "Failed to destroy the HMC resources: %d\n", ret_code);
8403
8404         /* shutdown the adminq */
8405         ret_code = i40e_shutdown_adminq(&pf->hw);
8406         if (ret_code)
8407                 dev_warn(&pdev->dev,
8408                          "Failed to destroy the Admin Queue resources: %d\n",
8409                          ret_code);
8410
8411         /* Clear all dynamic memory lists of rings, q_vectors, and VSIs */
8412         i40e_clear_interrupt_scheme(pf);
8413         for (i = 0; i < pf->hw.func_caps.num_vsis; i++) {
8414                 if (pf->vsi[i]) {
8415                         i40e_vsi_clear_rings(pf->vsi[i]);
8416                         i40e_vsi_clear(pf->vsi[i]);
8417                         pf->vsi[i] = NULL;
8418                 }
8419         }
8420
8421         for (i = 0; i < I40E_MAX_VEB; i++) {
8422                 kfree(pf->veb[i]);
8423                 pf->veb[i] = NULL;
8424         }
8425
8426         kfree(pf->qp_pile);
8427         kfree(pf->irq_pile);
8428         kfree(pf->sw_config);
8429         kfree(pf->vsi);
8430
8431         /* force a PF reset to clean anything leftover */
8432         reg = rd32(&pf->hw, I40E_PFGEN_CTRL);
8433         wr32(&pf->hw, I40E_PFGEN_CTRL, (reg | I40E_PFGEN_CTRL_PFSWR_MASK));
8434         i40e_flush(&pf->hw);
8435
8436         iounmap(pf->hw.hw_addr);
8437         kfree(pf);
8438         pci_release_selected_regions(pdev,
8439                                      pci_select_bars(pdev, IORESOURCE_MEM));
8440
8441         pci_disable_pcie_error_reporting(pdev);
8442         pci_disable_device(pdev);
8443 }
8444
8445 /**
8446  * i40e_pci_error_detected - warning that something funky happened in PCI land
8447  * @pdev: PCI device information struct
8448  *
8449  * Called to warn that something happened and the error handling steps
8450  * are in progress.  Allows the driver to quiesce things, be ready for
8451  * remediation.
8452  **/
8453 static pci_ers_result_t i40e_pci_error_detected(struct pci_dev *pdev,
8454                                                 enum pci_channel_state error)
8455 {
8456         struct i40e_pf *pf = pci_get_drvdata(pdev);
8457
8458         dev_info(&pdev->dev, "%s: error %d\n", __func__, error);
8459
8460         /* shutdown all operations */
8461         if (!test_bit(__I40E_SUSPENDED, &pf->state)) {
8462                 rtnl_lock();
8463                 i40e_prep_for_reset(pf);
8464                 rtnl_unlock();
8465         }
8466
8467         /* Request a slot reset */
8468         return PCI_ERS_RESULT_NEED_RESET;
8469 }
8470
8471 /**
8472  * i40e_pci_error_slot_reset - a PCI slot reset just happened
8473  * @pdev: PCI device information struct
8474  *
8475  * Called to find if the driver can work with the device now that
8476  * the pci slot has been reset.  If a basic connection seems good
8477  * (registers are readable and have sane content) then return a
8478  * happy little PCI_ERS_RESULT_xxx.
8479  **/
8480 static pci_ers_result_t i40e_pci_error_slot_reset(struct pci_dev *pdev)
8481 {
8482         struct i40e_pf *pf = pci_get_drvdata(pdev);
8483         pci_ers_result_t result;
8484         int err;
8485         u32 reg;
8486
8487         dev_info(&pdev->dev, "%s\n", __func__);
8488         if (pci_enable_device_mem(pdev)) {
8489                 dev_info(&pdev->dev,
8490                          "Cannot re-enable PCI device after reset.\n");
8491                 result = PCI_ERS_RESULT_DISCONNECT;
8492         } else {
8493                 pci_set_master(pdev);
8494                 pci_restore_state(pdev);
8495                 pci_save_state(pdev);
8496                 pci_wake_from_d3(pdev, false);
8497
8498                 reg = rd32(&pf->hw, I40E_GLGEN_RTRIG);
8499                 if (reg == 0)
8500                         result = PCI_ERS_RESULT_RECOVERED;
8501                 else
8502                         result = PCI_ERS_RESULT_DISCONNECT;
8503         }
8504
8505         err = pci_cleanup_aer_uncorrect_error_status(pdev);
8506         if (err) {
8507                 dev_info(&pdev->dev,
8508                          "pci_cleanup_aer_uncorrect_error_status failed 0x%0x\n",
8509                          err);
8510                 /* non-fatal, continue */
8511         }
8512
8513         return result;
8514 }
8515
8516 /**
8517  * i40e_pci_error_resume - restart operations after PCI error recovery
8518  * @pdev: PCI device information struct
8519  *
8520  * Called to allow the driver to bring things back up after PCI error
8521  * and/or reset recovery has finished.
8522  **/
8523 static void i40e_pci_error_resume(struct pci_dev *pdev)
8524 {
8525         struct i40e_pf *pf = pci_get_drvdata(pdev);
8526
8527         dev_info(&pdev->dev, "%s\n", __func__);
8528         if (test_bit(__I40E_SUSPENDED, &pf->state))
8529                 return;
8530
8531         rtnl_lock();
8532         i40e_handle_reset_warning(pf);
8533         rtnl_lock();
8534 }
8535
8536 /**
8537  * i40e_shutdown - PCI callback for shutting down
8538  * @pdev: PCI device information struct
8539  **/
8540 static void i40e_shutdown(struct pci_dev *pdev)
8541 {
8542         struct i40e_pf *pf = pci_get_drvdata(pdev);
8543         struct i40e_hw *hw = &pf->hw;
8544
8545         set_bit(__I40E_SUSPENDED, &pf->state);
8546         set_bit(__I40E_DOWN, &pf->state);
8547         rtnl_lock();
8548         i40e_prep_for_reset(pf);
8549         rtnl_unlock();
8550
8551         wr32(hw, I40E_PFPM_APM, (pf->wol_en ? I40E_PFPM_APM_APME_MASK : 0));
8552         wr32(hw, I40E_PFPM_WUFC, (pf->wol_en ? I40E_PFPM_WUFC_MAG_MASK : 0));
8553
8554         if (system_state == SYSTEM_POWER_OFF) {
8555                 pci_wake_from_d3(pdev, pf->wol_en);
8556                 pci_set_power_state(pdev, PCI_D3hot);
8557         }
8558 }
8559
8560 #ifdef CONFIG_PM
8561 /**
8562  * i40e_suspend - PCI callback for moving to D3
8563  * @pdev: PCI device information struct
8564  **/
8565 static int i40e_suspend(struct pci_dev *pdev, pm_message_t state)
8566 {
8567         struct i40e_pf *pf = pci_get_drvdata(pdev);
8568         struct i40e_hw *hw = &pf->hw;
8569
8570         set_bit(__I40E_SUSPENDED, &pf->state);
8571         set_bit(__I40E_DOWN, &pf->state);
8572         rtnl_lock();
8573         i40e_prep_for_reset(pf);
8574         rtnl_unlock();
8575
8576         wr32(hw, I40E_PFPM_APM, (pf->wol_en ? I40E_PFPM_APM_APME_MASK : 0));
8577         wr32(hw, I40E_PFPM_WUFC, (pf->wol_en ? I40E_PFPM_WUFC_MAG_MASK : 0));
8578
8579         pci_wake_from_d3(pdev, pf->wol_en);
8580         pci_set_power_state(pdev, PCI_D3hot);
8581
8582         return 0;
8583 }
8584
8585 /**
8586  * i40e_resume - PCI callback for waking up from D3
8587  * @pdev: PCI device information struct
8588  **/
8589 static int i40e_resume(struct pci_dev *pdev)
8590 {
8591         struct i40e_pf *pf = pci_get_drvdata(pdev);
8592         u32 err;
8593
8594         pci_set_power_state(pdev, PCI_D0);
8595         pci_restore_state(pdev);
8596         /* pci_restore_state() clears dev->state_saves, so
8597          * call pci_save_state() again to restore it.
8598          */
8599         pci_save_state(pdev);
8600
8601         err = pci_enable_device_mem(pdev);
8602         if (err) {
8603                 dev_err(&pdev->dev,
8604                         "%s: Cannot enable PCI device from suspend\n",
8605                         __func__);
8606                 return err;
8607         }
8608         pci_set_master(pdev);
8609
8610         /* no wakeup events while running */
8611         pci_wake_from_d3(pdev, false);
8612
8613         /* handling the reset will rebuild the device state */
8614         if (test_and_clear_bit(__I40E_SUSPENDED, &pf->state)) {
8615                 clear_bit(__I40E_DOWN, &pf->state);
8616                 rtnl_lock();
8617                 i40e_reset_and_rebuild(pf, false);
8618                 rtnl_unlock();
8619         }
8620
8621         return 0;
8622 }
8623
8624 #endif
8625 static const struct pci_error_handlers i40e_err_handler = {
8626         .error_detected = i40e_pci_error_detected,
8627         .slot_reset = i40e_pci_error_slot_reset,
8628         .resume = i40e_pci_error_resume,
8629 };
8630
8631 static struct pci_driver i40e_driver = {
8632         .name     = i40e_driver_name,
8633         .id_table = i40e_pci_tbl,
8634         .probe    = i40e_probe,
8635         .remove   = i40e_remove,
8636 #ifdef CONFIG_PM
8637         .suspend  = i40e_suspend,
8638         .resume   = i40e_resume,
8639 #endif
8640         .shutdown = i40e_shutdown,
8641         .err_handler = &i40e_err_handler,
8642         .sriov_configure = i40e_pci_sriov_configure,
8643 };
8644
8645 /**
8646  * i40e_init_module - Driver registration routine
8647  *
8648  * i40e_init_module is the first routine called when the driver is
8649  * loaded. All it does is register with the PCI subsystem.
8650  **/
8651 static int __init i40e_init_module(void)
8652 {
8653         pr_info("%s: %s - version %s\n", i40e_driver_name,
8654                 i40e_driver_string, i40e_driver_version_str);
8655         pr_info("%s: %s\n", i40e_driver_name, i40e_copyright);
8656         i40e_dbg_init();
8657         return pci_register_driver(&i40e_driver);
8658 }
8659 module_init(i40e_init_module);
8660
8661 /**
8662  * i40e_exit_module - Driver exit cleanup routine
8663  *
8664  * i40e_exit_module is called just before the driver is removed
8665  * from memory.
8666  **/
8667 static void __exit i40e_exit_module(void)
8668 {
8669         pci_unregister_driver(&i40e_driver);
8670         i40e_dbg_exit();
8671 }
8672 module_exit(i40e_exit_module);