drivers/net/ethernet/intel/i40evf/i40evf_main.c

   1 /*******************************************************************************
   2  *
   3  * Intel Ethernet Controller XL710 Family Linux Virtual Function Driver
   4  * Copyright(c) 2013 - 2015 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 #include "i40evf.h"
  28 #include "i40e_prototype.h"
  29 static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter);
  30 static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter);
  31 static int i40evf_close(struct net_device *netdev);
  32
  33 char i40evf_driver_name[] = "i40evf";
  34 static const char i40evf_driver_string[] =
  35         "Intel(R) XL710/X710 Virtual Function Network Driver";
  36
  37 #define DRV_KERN "-k"
  38
  39 #define DRV_VERSION_MAJOR 1
  40 #define DRV_VERSION_MINOR 4
  41 #define DRV_VERSION_BUILD 4
  42 #define DRV_VERSION __stringify(DRV_VERSION_MAJOR) "." \
  43              __stringify(DRV_VERSION_MINOR) "." \
  44              __stringify(DRV_VERSION_BUILD) \
  45              DRV_KERN
  46 const char i40evf_driver_version[] = DRV_VERSION;
  47 static const char i40evf_copyright[] =
  48         "Copyright (c) 2013 - 2015 Intel Corporation.";
  49
  50 /* i40evf_pci_tbl - PCI Device ID Table
  51  *
  52  * Wildcard entries (PCI_ANY_ID) should come last
  53  * Last entry must be all 0s
  54  *
  55  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  56  *   Class, Class Mask, private data (not used) }
  57  */
  58 static const struct pci_device_id i40evf_pci_tbl[] = {
  59         {PCI_VDEVICE(INTEL, I40E_DEV_ID_VF), 0},
  60         {PCI_VDEVICE(INTEL, I40E_DEV_ID_X722_VF), 0},
  61         /* required last entry */
  62         {0, }
  63 };
  64
  65 MODULE_DEVICE_TABLE(pci, i40evf_pci_tbl);
  66
  67 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
  68 MODULE_DESCRIPTION("Intel(R) XL710 X710 Virtual Function Network Driver");
  69 MODULE_LICENSE("GPL");
  70 MODULE_VERSION(DRV_VERSION);
  71
  72 /**
  73  * i40evf_allocate_dma_mem_d - OS specific memory alloc for shared code
  74  * @hw:   pointer to the HW structure
  75  * @mem:  ptr to mem struct to fill out
  76  * @size: size of memory requested
  77  * @alignment: what to align the allocation to
  78  **/
  79 i40e_status i40evf_allocate_dma_mem_d(struct i40e_hw *hw,
  80                                       struct i40e_dma_mem *mem,
  81                                       u64 size, u32 alignment)
  82 {
  83         struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
  84
  85         if (!mem)
  86                 return I40E_ERR_PARAM;
  87
  88         mem->size = ALIGN(size, alignment);
  89         mem->va = dma_alloc_coherent(&adapter->pdev->dev, mem->size,
  90                                      (dma_addr_t *)&mem->pa, GFP_KERNEL);
  91         if (mem->va)
  92                 return 0;
  93         else
  94                 return I40E_ERR_NO_MEMORY;
  95 }
  96
  97 /**
  98  * i40evf_free_dma_mem_d - OS specific memory free for shared code
  99  * @hw:   pointer to the HW structure
 100  * @mem:  ptr to mem struct to free
 101  **/
 102 i40e_status i40evf_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem)
 103 {
 104         struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
 105
 106         if (!mem || !mem->va)
 107                 return I40E_ERR_PARAM;
 108         dma_free_coherent(&adapter->pdev->dev, mem->size,
 109                           mem->va, (dma_addr_t)mem->pa);
 110         return 0;
 111 }
 112
 113 /**
 114  * i40evf_allocate_virt_mem_d - OS specific memory alloc for shared code
 115  * @hw:   pointer to the HW structure
 116  * @mem:  ptr to mem struct to fill out
 117  * @size: size of memory requested
 118  **/
 119 i40e_status i40evf_allocate_virt_mem_d(struct i40e_hw *hw,
 120                                        struct i40e_virt_mem *mem, u32 size)
 121 {
 122         if (!mem)
 123                 return I40E_ERR_PARAM;
 124
 125         mem->size = size;
 126         mem->va = kzalloc(size, GFP_KERNEL);
 127
 128         if (mem->va)
 129                 return 0;
 130         else
 131                 return I40E_ERR_NO_MEMORY;
 132 }
 133
 134 /**
 135  * i40evf_free_virt_mem_d - OS specific memory free for shared code
 136  * @hw:   pointer to the HW structure
 137  * @mem:  ptr to mem struct to free
 138  **/
 139 i40e_status i40evf_free_virt_mem_d(struct i40e_hw *hw,
 140                                    struct i40e_virt_mem *mem)
 141 {
 142         if (!mem)
 143                 return I40E_ERR_PARAM;
 144
 145         /* it's ok to kfree a NULL pointer */
 146         kfree(mem->va);
 147
 148         return 0;
 149 }
 150
 151 /**
 152  * i40evf_debug_d - OS dependent version of debug printing
 153  * @hw:  pointer to the HW structure
 154  * @mask: debug level mask
 155  * @fmt_str: printf-type format description
 156  **/
 157 void i40evf_debug_d(void *hw, u32 mask, char *fmt_str, ...)
 158 {
 159         char buf[512];
 160         va_list argptr;
 161
 162         if (!(mask & ((struct i40e_hw *)hw)->debug_mask))
 163                 return;
 164
 165         va_start(argptr, fmt_str);
 166         vsnprintf(buf, sizeof(buf), fmt_str, argptr);
 167         va_end(argptr);
 168
 169         /* the debug string is already formatted with a newline */
 170         pr_info("%s", buf);
 171 }
 172
 173 /**
 174  * i40evf_tx_timeout - Respond to a Tx Hang
 175  * @netdev: network interface device structure
 176  **/
 177 static void i40evf_tx_timeout(struct net_device *netdev)
 178 {
 179         struct i40evf_adapter *adapter = netdev_priv(netdev);
 180
 181         adapter->tx_timeout_count++;
 182         if (!(adapter->flags & (I40EVF_FLAG_RESET_PENDING |
 183                                 I40EVF_FLAG_RESET_NEEDED))) {
 184                 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
 185                 schedule_work(&adapter->reset_task);
 186         }
 187 }
 188
 189 /**
 190  * i40evf_misc_irq_disable - Mask off interrupt generation on the NIC
 191  * @adapter: board private structure
 192  **/
 193 static void i40evf_misc_irq_disable(struct i40evf_adapter *adapter)
 194 {
 195         struct i40e_hw *hw = &adapter->hw;
 196
 197         wr32(hw, I40E_VFINT_DYN_CTL01, 0);
 198
 199         /* read flush */
 200         rd32(hw, I40E_VFGEN_RSTAT);
 201
 202         synchronize_irq(adapter->msix_entries[0].vector);
 203 }
 204
 205 /**
 206  * i40evf_misc_irq_enable - Enable default interrupt generation settings
 207  * @adapter: board private structure
 208  **/
 209 static void i40evf_misc_irq_enable(struct i40evf_adapter *adapter)
 210 {
 211         struct i40e_hw *hw = &adapter->hw;
 212
 213         wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK |
 214                                        I40E_VFINT_DYN_CTL01_ITR_INDX_MASK);
 215         wr32(hw, I40E_VFINT_ICR0_ENA1, I40E_VFINT_ICR0_ENA1_ADMINQ_MASK);
 216
 217         /* read flush */
 218         rd32(hw, I40E_VFGEN_RSTAT);
 219 }
 220
 221 /**
 222  * i40evf_irq_disable - Mask off interrupt generation on the NIC
 223  * @adapter: board private structure
 224  **/
 225 static void i40evf_irq_disable(struct i40evf_adapter *adapter)
 226 {
 227         int i;
 228         struct i40e_hw *hw = &adapter->hw;
 229
 230         if (!adapter->msix_entries)
 231                 return;
 232
 233         for (i = 1; i < adapter->num_msix_vectors; i++) {
 234                 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), 0);
 235                 synchronize_irq(adapter->msix_entries[i].vector);
 236         }
 237         /* read flush */
 238         rd32(hw, I40E_VFGEN_RSTAT);
 239 }
 240
 241 /**
 242  * i40evf_irq_enable_queues - Enable interrupt for specified queues
 243  * @adapter: board private structure
 244  * @mask: bitmap of queues to enable
 245  **/
 246 void i40evf_irq_enable_queues(struct i40evf_adapter *adapter, u32 mask)
 247 {
 248         struct i40e_hw *hw = &adapter->hw;
 249         int i;
 250
 251         for (i = 1; i < adapter->num_msix_vectors; i++) {
 252                 if (mask & BIT(i - 1)) {
 253                         wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1),
 254                              I40E_VFINT_DYN_CTLN1_INTENA_MASK |
 255                              I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
 256                              I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK);
 257                 }
 258         }
 259 }
 260
 261 /**
 262  * i40evf_fire_sw_int - Generate SW interrupt for specified vectors
 263  * @adapter: board private structure
 264  * @mask: bitmap of vectors to trigger
 265  **/
 266 static void i40evf_fire_sw_int(struct i40evf_adapter *adapter, u32 mask)
 267 {
 268         struct i40e_hw *hw = &adapter->hw;
 269         int i;
 270         u32 dyn_ctl;
 271
 272         if (mask & 1) {
 273                 dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTL01);
 274                 dyn_ctl |= I40E_VFINT_DYN_CTLN1_SWINT_TRIG_MASK |
 275                            I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
 276                            I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK;
 277                 wr32(hw, I40E_VFINT_DYN_CTL01, dyn_ctl);
 278         }
 279         for (i = 1; i < adapter->num_msix_vectors; i++) {
 280                 if (mask & BIT(i)) {
 281                         dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTLN1(i - 1));
 282                         dyn_ctl |= I40E_VFINT_DYN_CTLN1_SWINT_TRIG_MASK |
 283                                    I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
 284                                    I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK;
 285                         wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), dyn_ctl);
 286                 }
 287         }
 288 }
 289
 290 /**
 291  * i40evf_irq_enable - Enable default interrupt generation settings
 292  * @adapter: board private structure
 293  * @flush: boolean value whether to run rd32()
 294  **/
 295 void i40evf_irq_enable(struct i40evf_adapter *adapter, bool flush)
 296 {
 297         struct i40e_hw *hw = &adapter->hw;
 298
 299         i40evf_misc_irq_enable(adapter);
 300         i40evf_irq_enable_queues(adapter, ~0);
 301
 302         if (flush)
 303                 rd32(hw, I40E_VFGEN_RSTAT);
 304 }
 305
 306 /**
 307  * i40evf_msix_aq - Interrupt handler for vector 0
 308  * @irq: interrupt number
 309  * @data: pointer to netdev
 310  **/
 311 static irqreturn_t i40evf_msix_aq(int irq, void *data)
 312 {
 313         struct net_device *netdev = data;
 314         struct i40evf_adapter *adapter = netdev_priv(netdev);
 315         struct i40e_hw *hw = &adapter->hw;
 316         u32 val;
 317
 318         /* handle non-queue interrupts, these reads clear the registers */
 319         val = rd32(hw, I40E_VFINT_ICR01);
 320         val = rd32(hw, I40E_VFINT_ICR0_ENA1);
 321
 322         val = rd32(hw, I40E_VFINT_DYN_CTL01) |
 323               I40E_VFINT_DYN_CTL01_CLEARPBA_MASK;
 324         wr32(hw, I40E_VFINT_DYN_CTL01, val);
 325
 326         /* schedule work on the private workqueue */
 327         schedule_work(&adapter->adminq_task);
 328
 329         return IRQ_HANDLED;
 330 }
 331
 332 /**
 333  * i40evf_msix_clean_rings - MSIX mode Interrupt Handler
 334  * @irq: interrupt number
 335  * @data: pointer to a q_vector
 336  **/
 337 static irqreturn_t i40evf_msix_clean_rings(int irq, void *data)
 338 {
 339         struct i40e_q_vector *q_vector = data;
 340
 341         if (!q_vector->tx.ring && !q_vector->rx.ring)
 342                 return IRQ_HANDLED;
 343
 344         napi_schedule_irqoff(&q_vector->napi);
 345
 346         return IRQ_HANDLED;
 347 }
 348
 349 /**
 350  * i40evf_map_vector_to_rxq - associate irqs with rx queues
 351  * @adapter: board private structure
 352  * @v_idx: interrupt number
 353  * @r_idx: queue number
 354  **/
 355 static void
 356 i40evf_map_vector_to_rxq(struct i40evf_adapter *adapter, int v_idx, int r_idx)
 357 {
 358         struct i40e_q_vector *q_vector = &adapter->q_vectors[v_idx];
 359         struct i40e_ring *rx_ring = &adapter->rx_rings[r_idx];
 360
 361         rx_ring->q_vector = q_vector;
 362         rx_ring->next = q_vector->rx.ring;
 363         rx_ring->vsi = &adapter->vsi;
 364         q_vector->rx.ring = rx_ring;
 365         q_vector->rx.count++;
 366         q_vector->rx.latency_range = I40E_LOW_LATENCY;
 367         q_vector->itr_countdown = ITR_COUNTDOWN_START;
 368 }
 369
 370 /**
 371  * i40evf_map_vector_to_txq - associate irqs with tx queues
 372  * @adapter: board private structure
 373  * @v_idx: interrupt number
 374  * @t_idx: queue number
 375  **/
 376 static void
 377 i40evf_map_vector_to_txq(struct i40evf_adapter *adapter, int v_idx, int t_idx)
 378 {
 379         struct i40e_q_vector *q_vector = &adapter->q_vectors[v_idx];
 380         struct i40e_ring *tx_ring = &adapter->tx_rings[t_idx];
 381
 382         tx_ring->q_vector = q_vector;
 383         tx_ring->next = q_vector->tx.ring;
 384         tx_ring->vsi = &adapter->vsi;
 385         q_vector->tx.ring = tx_ring;
 386         q_vector->tx.count++;
 387         q_vector->tx.latency_range = I40E_LOW_LATENCY;
 388         q_vector->itr_countdown = ITR_COUNTDOWN_START;
 389         q_vector->num_ringpairs++;
 390         q_vector->ring_mask |= BIT(t_idx);
 391 }
 392
 393 /**
 394  * i40evf_map_rings_to_vectors - Maps descriptor rings to vectors
 395  * @adapter: board private structure to initialize
 396  *
 397  * This function maps descriptor rings to the queue-specific vectors
 398  * we were allotted through the MSI-X enabling code.  Ideally, we'd have
 399  * one vector per ring/queue, but on a constrained vector budget, we
 400  * group the rings as "efficiently" as possible.  You would add new
 401  * mapping configurations in here.
 402  **/
 403 static int i40evf_map_rings_to_vectors(struct i40evf_adapter *adapter)
 404 {
 405         int q_vectors;
 406         int v_start = 0;
 407         int rxr_idx = 0, txr_idx = 0;
 408         int rxr_remaining = adapter->num_active_queues;
 409         int txr_remaining = adapter->num_active_queues;
 410         int i, j;
 411         int rqpv, tqpv;
 412         int err = 0;
 413
 414         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 415
 416         /* The ideal configuration...
 417          * We have enough vectors to map one per queue.
 418          */
 419         if (q_vectors >= (rxr_remaining * 2)) {
 420                 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
 421                         i40evf_map_vector_to_rxq(adapter, v_start, rxr_idx);
 422
 423                 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
 424                         i40evf_map_vector_to_txq(adapter, v_start, txr_idx);
 425                 goto out;
 426         }
 427
 428         /* If we don't have enough vectors for a 1-to-1
 429          * mapping, we'll have to group them so there are
 430          * multiple queues per vector.
 431          * Re-adjusting *qpv takes care of the remainder.
 432          */
 433         for (i = v_start; i < q_vectors; i++) {
 434                 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
 435                 for (j = 0; j < rqpv; j++) {
 436                         i40evf_map_vector_to_rxq(adapter, i, rxr_idx);
 437                         rxr_idx++;
 438                         rxr_remaining--;
 439                 }
 440         }
 441         for (i = v_start; i < q_vectors; i++) {
 442                 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
 443                 for (j = 0; j < tqpv; j++) {
 444                         i40evf_map_vector_to_txq(adapter, i, txr_idx);
 445                         txr_idx++;
 446                         txr_remaining--;
 447                 }
 448         }
 449
 450 out:
 451         adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
 452
 453         return err;
 454 }
 455
 456 #ifdef CONFIG_NET_POLL_CONTROLLER
 457 /**
 458  * i40evf_netpoll - A Polling 'interrupt' handler
 459  * @netdev: network interface device structure
 460  *
 461  * This is used by netconsole to send skbs without having to re-enable
 462  * interrupts.  It's not called while the normal interrupt routine is executing.
 463  **/
 464 static void i40evf_netpoll(struct net_device *netdev)
 465 {
 466         struct i40evf_adapter *adapter = netdev_priv(netdev);
 467         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 468         int i;
 469
 470         /* if interface is down do nothing */
 471         if (test_bit(__I40E_DOWN, &adapter->vsi.state))
 472                 return;
 473
 474         for (i = 0; i < q_vectors; i++)
 475                 i40evf_msix_clean_rings(0, &adapter->q_vectors[i]);
 476 }
 477
 478 #endif
 479 /**
 480  * i40evf_request_traffic_irqs - Initialize MSI-X interrupts
 481  * @adapter: board private structure
 482  *
 483  * Allocates MSI-X vectors for tx and rx handling, and requests
 484  * interrupts from the kernel.
 485  **/
 486 static int
 487 i40evf_request_traffic_irqs(struct i40evf_adapter *adapter, char *basename)
 488 {
 489         int vector, err, q_vectors;
 490         int rx_int_idx = 0, tx_int_idx = 0;
 491
 492         i40evf_irq_disable(adapter);
 493         /* Decrement for Other and TCP Timer vectors */
 494         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 495
 496         for (vector = 0; vector < q_vectors; vector++) {
 497                 struct i40e_q_vector *q_vector = &adapter->q_vectors[vector];
 498
 499                 if (q_vector->tx.ring && q_vector->rx.ring) {
 500                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 501                                  "i40evf-%s-%s-%d", basename,
 502                                  "TxRx", rx_int_idx++);
 503                         tx_int_idx++;
 504                 } else if (q_vector->rx.ring) {
 505                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 506                                  "i40evf-%s-%s-%d", basename,
 507                                  "rx", rx_int_idx++);
 508                 } else if (q_vector->tx.ring) {
 509                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 510                                  "i40evf-%s-%s-%d", basename,
 511                                  "tx", tx_int_idx++);
 512                 } else {
 513                         /* skip this unused q_vector */
 514                         continue;
 515                 }
 516                 err = request_irq(
 517                         adapter->msix_entries[vector + NONQ_VECS].vector,
 518                         i40evf_msix_clean_rings,
 519                         0,
 520                         q_vector->name,
 521                         q_vector);
 522                 if (err) {
 523                         dev_info(&adapter->pdev->dev,
 524                                  "Request_irq failed, error: %d\n", err);
 525                         goto free_queue_irqs;
 526                 }
 527                 /* assign the mask for this irq */
 528                 irq_set_affinity_hint(
 529                         adapter->msix_entries[vector + NONQ_VECS].vector,
 530                         q_vector->affinity_mask);
 531         }
 532
 533         return 0;
 534
 535 free_queue_irqs:
 536         while (vector) {
 537                 vector--;
 538                 irq_set_affinity_hint(
 539                         adapter->msix_entries[vector + NONQ_VECS].vector,
 540                         NULL);
 541                 free_irq(adapter->msix_entries[vector + NONQ_VECS].vector,
 542                          &adapter->q_vectors[vector]);
 543         }
 544         return err;
 545 }
 546
 547 /**
 548  * i40evf_request_misc_irq - Initialize MSI-X interrupts
 549  * @adapter: board private structure
 550  *
 551  * Allocates MSI-X vector 0 and requests interrupts from the kernel. This
 552  * vector is only for the admin queue, and stays active even when the netdev
 553  * is closed.
 554  **/
 555 static int i40evf_request_misc_irq(struct i40evf_adapter *adapter)
 556 {
 557         struct net_device *netdev = adapter->netdev;
 558         int err;
 559
 560         snprintf(adapter->misc_vector_name,
 561                  sizeof(adapter->misc_vector_name) - 1, "i40evf-%s:mbx",
 562                  dev_name(&adapter->pdev->dev));
 563         err = request_irq(adapter->msix_entries[0].vector,
 564                           &i40evf_msix_aq, 0,
 565                           adapter->misc_vector_name, netdev);
 566         if (err) {
 567                 dev_err(&adapter->pdev->dev,
 568                         "request_irq for %s failed: %d\n",
 569                         adapter->misc_vector_name, err);
 570                 free_irq(adapter->msix_entries[0].vector, netdev);
 571         }
 572         return err;
 573 }
 574
 575 /**
 576  * i40evf_free_traffic_irqs - Free MSI-X interrupts
 577  * @adapter: board private structure
 578  *
 579  * Frees all MSI-X vectors other than 0.
 580  **/
 581 static void i40evf_free_traffic_irqs(struct i40evf_adapter *adapter)
 582 {
 583         int i;
 584         int q_vectors;
 585
 586         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 587
 588         for (i = 0; i < q_vectors; i++) {
 589                 irq_set_affinity_hint(adapter->msix_entries[i+1].vector,
 590                                       NULL);
 591                 free_irq(adapter->msix_entries[i+1].vector,
 592                          &adapter->q_vectors[i]);
 593         }
 594 }
 595
 596 /**
 597  * i40evf_free_misc_irq - Free MSI-X miscellaneous vector
 598  * @adapter: board private structure
 599  *
 600  * Frees MSI-X vector 0.
 601  **/
 602 static void i40evf_free_misc_irq(struct i40evf_adapter *adapter)
 603 {
 604         struct net_device *netdev = adapter->netdev;
 605
 606         free_irq(adapter->msix_entries[0].vector, netdev);
 607 }
 608
 609 /**
 610  * i40evf_configure_tx - Configure Transmit Unit after Reset
 611  * @adapter: board private structure
 612  *
 613  * Configure the Tx unit of the MAC after a reset.
 614  **/
 615 static void i40evf_configure_tx(struct i40evf_adapter *adapter)
 616 {
 617         struct i40e_hw *hw = &adapter->hw;
 618         int i;
 619
 620         for (i = 0; i < adapter->num_active_queues; i++)
 621                 adapter->tx_rings[i].tail = hw->hw_addr + I40E_QTX_TAIL1(i);
 622 }
 623
 624 /**
 625  * i40evf_configure_rx - Configure Receive Unit after Reset
 626  * @adapter: board private structure
 627  *
 628  * Configure the Rx unit of the MAC after a reset.
 629  **/
 630 static void i40evf_configure_rx(struct i40evf_adapter *adapter)
 631 {
 632         struct i40e_hw *hw = &adapter->hw;
 633         struct net_device *netdev = adapter->netdev;
 634         int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
 635         int i;
 636         int rx_buf_len;
 637
 638
 639         adapter->flags &= ~I40EVF_FLAG_RX_PS_CAPABLE;
 640         adapter->flags |= I40EVF_FLAG_RX_1BUF_CAPABLE;
 641
 642         /* Decide whether to use packet split mode or not */
 643         if (netdev->mtu > ETH_DATA_LEN) {
 644                 if (adapter->flags & I40EVF_FLAG_RX_PS_CAPABLE)
 645                         adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
 646                 else
 647                         adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
 648         } else {
 649                 if (adapter->flags & I40EVF_FLAG_RX_1BUF_CAPABLE)
 650                         adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
 651                 else
 652                         adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
 653         }
 654
 655         /* Set the RX buffer length according to the mode */
 656         if (adapter->flags & I40EVF_FLAG_RX_PS_ENABLED) {
 657                 rx_buf_len = I40E_RX_HDR_SIZE;
 658         } else {
 659                 if (netdev->mtu <= ETH_DATA_LEN)
 660                         rx_buf_len = I40EVF_RXBUFFER_2048;
 661                 else
 662                         rx_buf_len = ALIGN(max_frame, 1024);
 663         }
 664
 665         for (i = 0; i < adapter->num_active_queues; i++) {
 666                 adapter->rx_rings[i].tail = hw->hw_addr + I40E_QRX_TAIL1(i);
 667                 adapter->rx_rings[i].rx_buf_len = rx_buf_len;
 668         }
 669 }
 670
 671 /**
 672  * i40evf_find_vlan - Search filter list for specific vlan filter
 673  * @adapter: board private structure
 674  * @vlan: vlan tag
 675  *
 676  * Returns ptr to the filter object or NULL
 677  **/
 678 static struct
 679 i40evf_vlan_filter *i40evf_find_vlan(struct i40evf_adapter *adapter, u16 vlan)
 680 {
 681         struct i40evf_vlan_filter *f;
 682
 683         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
 684                 if (vlan == f->vlan)
 685                         return f;
 686         }
 687         return NULL;
 688 }
 689
 690 /**
 691  * i40evf_add_vlan - Add a vlan filter to the list
 692  * @adapter: board private structure
 693  * @vlan: VLAN tag
 694  *
 695  * Returns ptr to the filter object or NULL when no memory available.
 696  **/
 697 static struct
 698 i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan)
 699 {
 700         struct i40evf_vlan_filter *f = NULL;
 701         int count = 50;
 702
 703         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 704                                 &adapter->crit_section)) {
 705                 udelay(1);
 706                 if (--count == 0)
 707                         goto out;
 708         }
 709
 710         f = i40evf_find_vlan(adapter, vlan);
 711         if (!f) {
 712                 f = kzalloc(sizeof(*f), GFP_ATOMIC);
 713                 if (!f)
 714                         goto clearout;
 715
 716                 f->vlan = vlan;
 717
 718                 INIT_LIST_HEAD(&f->list);
 719                 list_add(&f->list, &adapter->vlan_filter_list);
 720                 f->add = true;
 721                 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
 722         }
 723
 724 clearout:
 725         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 726 out:
 727         return f;
 728 }
 729
 730 /**
 731  * i40evf_del_vlan - Remove a vlan filter from the list
 732  * @adapter: board private structure
 733  * @vlan: VLAN tag
 734  **/
 735 static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan)
 736 {
 737         struct i40evf_vlan_filter *f;
 738         int count = 50;
 739
 740         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 741                                 &adapter->crit_section)) {
 742                 udelay(1);
 743                 if (--count == 0)
 744                         return;
 745         }
 746
 747         f = i40evf_find_vlan(adapter, vlan);
 748         if (f) {
 749                 f->remove = true;
 750                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
 751         }
 752         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 753 }
 754
 755 /**
 756  * i40evf_vlan_rx_add_vid - Add a VLAN filter to a device
 757  * @netdev: network device struct
 758  * @vid: VLAN tag
 759  **/
 760 static int i40evf_vlan_rx_add_vid(struct net_device *netdev,
 761                                   __always_unused __be16 proto, u16 vid)
 762 {
 763         struct i40evf_adapter *adapter = netdev_priv(netdev);
 764
 765         if (!VLAN_ALLOWED(adapter))
 766                 return -EIO;
 767         if (i40evf_add_vlan(adapter, vid) == NULL)
 768                 return -ENOMEM;
 769         return 0;
 770 }
 771
 772 /**
 773  * i40evf_vlan_rx_kill_vid - Remove a VLAN filter from a device
 774  * @netdev: network device struct
 775  * @vid: VLAN tag
 776  **/
 777 static int i40evf_vlan_rx_kill_vid(struct net_device *netdev,
 778                                    __always_unused __be16 proto, u16 vid)
 779 {
 780         struct i40evf_adapter *adapter = netdev_priv(netdev);
 781
 782         if (VLAN_ALLOWED(adapter)) {
 783                 i40evf_del_vlan(adapter, vid);
 784                 return 0;
 785         }
 786         return -EIO;
 787 }
 788
 789 /**
 790  * i40evf_find_filter - Search filter list for specific mac filter
 791  * @adapter: board private structure
 792  * @macaddr: the MAC address
 793  *
 794  * Returns ptr to the filter object or NULL
 795  **/
 796 static struct
 797 i40evf_mac_filter *i40evf_find_filter(struct i40evf_adapter *adapter,
 798                                       u8 *macaddr)
 799 {
 800         struct i40evf_mac_filter *f;
 801
 802         if (!macaddr)
 803                 return NULL;
 804
 805         list_for_each_entry(f, &adapter->mac_filter_list, list) {
 806                 if (ether_addr_equal(macaddr, f->macaddr))
 807                         return f;
 808         }
 809         return NULL;
 810 }
 811
 812 /**
 813  * i40e_add_filter - Add a mac filter to the filter list
 814  * @adapter: board private structure
 815  * @macaddr: the MAC address
 816  *
 817  * Returns ptr to the filter object or NULL when no memory available.
 818  **/
 819 static struct
 820 i40evf_mac_filter *i40evf_add_filter(struct i40evf_adapter *adapter,
 821                                      u8 *macaddr)
 822 {
 823         struct i40evf_mac_filter *f;
 824         int count = 50;
 825
 826         if (!macaddr)
 827                 return NULL;
 828
 829         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 830                                 &adapter->crit_section)) {
 831                 udelay(1);
 832                 if (--count == 0)
 833                         return NULL;
 834         }
 835
 836         f = i40evf_find_filter(adapter, macaddr);
 837         if (!f) {
 838                 f = kzalloc(sizeof(*f), GFP_ATOMIC);
 839                 if (!f) {
 840                         clear_bit(__I40EVF_IN_CRITICAL_TASK,
 841                                   &adapter->crit_section);
 842                         return NULL;
 843                 }
 844
 845                 ether_addr_copy(f->macaddr, macaddr);
 846
 847                 list_add(&f->list, &adapter->mac_filter_list);
 848                 f->add = true;
 849                 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
 850         }
 851
 852         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 853         return f;
 854 }
 855
 856 /**
 857  * i40evf_set_mac - NDO callback to set port mac address
 858  * @netdev: network interface device structure
 859  * @p: pointer to an address structure
 860  *
 861  * Returns 0 on success, negative on failure
 862  **/
 863 static int i40evf_set_mac(struct net_device *netdev, void *p)
 864 {
 865         struct i40evf_adapter *adapter = netdev_priv(netdev);
 866         struct i40e_hw *hw = &adapter->hw;
 867         struct i40evf_mac_filter *f;
 868         struct sockaddr *addr = p;
 869
 870         if (!is_valid_ether_addr(addr->sa_data))
 871                 return -EADDRNOTAVAIL;
 872
 873         if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
 874                 return 0;
 875
 876         if (adapter->flags & I40EVF_FLAG_ADDR_SET_BY_PF)
 877                 return -EPERM;
 878
 879         f = i40evf_find_filter(adapter, hw->mac.addr);
 880         if (f) {
 881                 f->remove = true;
 882                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
 883         }
 884
 885         f = i40evf_add_filter(adapter, addr->sa_data);
 886         if (f) {
 887                 ether_addr_copy(hw->mac.addr, addr->sa_data);
 888                 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
 889         }
 890
 891         return (f == NULL) ? -ENOMEM : 0;
 892 }
 893
 894 /**
 895  * i40evf_set_rx_mode - NDO callback to set the netdev filters
 896  * @netdev: network interface device structure
 897  **/
 898 static void i40evf_set_rx_mode(struct net_device *netdev)
 899 {
 900         struct i40evf_adapter *adapter = netdev_priv(netdev);
 901         struct i40evf_mac_filter *f, *ftmp;
 902         struct netdev_hw_addr *uca;
 903         struct netdev_hw_addr *mca;
 904         struct netdev_hw_addr *ha;
 905         int count = 50;
 906
 907         /* add addr if not already in the filter list */
 908         netdev_for_each_uc_addr(uca, netdev) {
 909                 i40evf_add_filter(adapter, uca->addr);
 910         }
 911         netdev_for_each_mc_addr(mca, netdev) {
 912                 i40evf_add_filter(adapter, mca->addr);
 913         }
 914
 915         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 916                                 &adapter->crit_section)) {
 917                 udelay(1);
 918                 if (--count == 0) {
 919                         dev_err(&adapter->pdev->dev,
 920                                 "Failed to get lock in %s\n", __func__);
 921                         return;
 922                 }
 923         }
 924         /* remove filter if not in netdev list */
 925         list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
 926                 netdev_for_each_mc_addr(mca, netdev)
 927                         if (ether_addr_equal(mca->addr, f->macaddr))
 928                                 goto bottom_of_search_loop;
 929
 930                 netdev_for_each_uc_addr(uca, netdev)
 931                         if (ether_addr_equal(uca->addr, f->macaddr))
 932                                 goto bottom_of_search_loop;
 933
 934                 for_each_dev_addr(netdev, ha)
 935                         if (ether_addr_equal(ha->addr, f->macaddr))
 936                                 goto bottom_of_search_loop;
 937
 938                 if (ether_addr_equal(f->macaddr, adapter->hw.mac.addr))
 939                         goto bottom_of_search_loop;
 940
 941                 /* f->macaddr wasn't found in uc, mc, or ha list so delete it */
 942                 f->remove = true;
 943                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
 944
 945 bottom_of_search_loop:
 946                 continue;
 947         }
 948         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 949 }
 950
 951 /**
 952  * i40evf_napi_enable_all - enable NAPI on all queue vectors
 953  * @adapter: board private structure
 954  **/
 955 static void i40evf_napi_enable_all(struct i40evf_adapter *adapter)
 956 {
 957         int q_idx;
 958         struct i40e_q_vector *q_vector;
 959         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 960
 961         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
 962                 struct napi_struct *napi;
 963
 964                 q_vector = &adapter->q_vectors[q_idx];
 965                 napi = &q_vector->napi;
 966                 napi_enable(napi);
 967         }
 968 }
 969
 970 /**
 971  * i40evf_napi_disable_all - disable NAPI on all queue vectors
 972  * @adapter: board private structure
 973  **/
 974 static void i40evf_napi_disable_all(struct i40evf_adapter *adapter)
 975 {
 976         int q_idx;
 977         struct i40e_q_vector *q_vector;
 978         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 979
 980         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
 981                 q_vector = &adapter->q_vectors[q_idx];
 982                 napi_disable(&q_vector->napi);
 983         }
 984 }
 985
 986 /**
 987  * i40evf_configure - set up transmit and receive data structures
 988  * @adapter: board private structure
 989  **/
 990 static void i40evf_configure(struct i40evf_adapter *adapter)
 991 {
 992         struct net_device *netdev = adapter->netdev;
 993         int i;
 994
 995         i40evf_set_rx_mode(netdev);
 996
 997         i40evf_configure_tx(adapter);
 998         i40evf_configure_rx(adapter);
 999         adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
1000
1001         for (i = 0; i < adapter->num_active_queues; i++) {
1002                 struct i40e_ring *ring = &adapter->rx_rings[i];
1003
1004                 i40evf_alloc_rx_buffers_1buf(ring, ring->count);
1005                 ring->next_to_use = ring->count - 1;
1006                 writel(ring->next_to_use, ring->tail);
1007         }
1008 }
1009
1010 /**
1011  * i40evf_up_complete - Finish the last steps of bringing up a connection
1012  * @adapter: board private structure
1013  **/
1014 static int i40evf_up_complete(struct i40evf_adapter *adapter)
1015 {
1016         adapter->state = __I40EVF_RUNNING;
1017         clear_bit(__I40E_DOWN, &adapter->vsi.state);
1018
1019         i40evf_napi_enable_all(adapter);
1020
1021         adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES;
1022         mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
1023         return 0;
1024 }
1025
1026 /**
1027  * i40e_down - Shutdown the connection processing
1028  * @adapter: board private structure
1029  **/
1030 void i40evf_down(struct i40evf_adapter *adapter)
1031 {
1032         struct net_device *netdev = adapter->netdev;
1033         struct i40evf_mac_filter *f;
1034
1035         if (adapter->state == __I40EVF_DOWN)
1036                 return;
1037
1038         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1039                                 &adapter->crit_section))
1040                 usleep_range(500, 1000);
1041
1042         netif_carrier_off(netdev);
1043         netif_tx_disable(netdev);
1044         i40evf_napi_disable_all(adapter);
1045         i40evf_irq_disable(adapter);
1046
1047         /* remove all MAC filters */
1048         list_for_each_entry(f, &adapter->mac_filter_list, list) {
1049                 f->remove = true;
1050         }
1051         /* remove all VLAN filters */
1052         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
1053                 f->remove = true;
1054         }
1055         if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) &&
1056             adapter->state != __I40EVF_RESETTING) {
1057                 /* cancel any current operation */
1058                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1059                 /* Schedule operations to close down the HW. Don't wait
1060                  * here for this to complete. The watchdog is still running
1061                  * and it will take care of this.
1062                  */
1063                 adapter->aq_required = I40EVF_FLAG_AQ_DEL_MAC_FILTER;
1064                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
1065                 adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
1066         }
1067
1068         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1069 }
1070
1071 /**
1072  * i40evf_acquire_msix_vectors - Setup the MSIX capability
1073  * @adapter: board private structure
1074  * @vectors: number of vectors to request
1075  *
1076  * Work with the OS to set up the MSIX vectors needed.
1077  *
1078  * Returns 0 on success, negative on failure
1079  **/
1080 static int
1081 i40evf_acquire_msix_vectors(struct i40evf_adapter *adapter, int vectors)
1082 {
1083         int err, vector_threshold;
1084
1085         /* We'll want at least 3 (vector_threshold):
1086          * 0) Other (Admin Queue and link, mostly)
1087          * 1) TxQ[0] Cleanup
1088          * 2) RxQ[0] Cleanup
1089          */
1090         vector_threshold = MIN_MSIX_COUNT;
1091
1092         /* The more we get, the more we will assign to Tx/Rx Cleanup
1093          * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1094          * Right now, we simply care about how many we'll get; we'll
1095          * set them up later while requesting irq's.
1096          */
1097         err = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
1098                                     vector_threshold, vectors);
1099         if (err < 0) {
1100                 dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts\n");
1101                 kfree(adapter->msix_entries);
1102                 adapter->msix_entries = NULL;
1103                 return err;
1104         }
1105
1106         /* Adjust for only the vectors we'll use, which is minimum
1107          * of max_msix_q_vectors + NONQ_VECS, or the number of
1108          * vectors we were allocated.
1109          */
1110         adapter->num_msix_vectors = err;
1111         return 0;
1112 }
1113
1114 /**
1115  * i40evf_free_queues - Free memory for all rings
1116  * @adapter: board private structure to initialize
1117  *
1118  * Free all of the memory associated with queue pairs.
1119  **/
1120 static void i40evf_free_queues(struct i40evf_adapter *adapter)
1121 {
1122         if (!adapter->vsi_res)
1123                 return;
1124         kfree(adapter->tx_rings);
1125         kfree(adapter->rx_rings);
1126 }
1127
1128 /**
1129  * i40evf_alloc_queues - Allocate memory for all rings
1130  * @adapter: board private structure to initialize
1131  *
1132  * We allocate one ring per queue at run-time since we don't know the
1133  * number of queues at compile-time.  The polling_netdev array is
1134  * intended for Multiqueue, but should work fine with a single queue.
1135  **/
1136 static int i40evf_alloc_queues(struct i40evf_adapter *adapter)
1137 {
1138         int i;
1139
1140         adapter->tx_rings = kcalloc(adapter->num_active_queues,
1141                                     sizeof(struct i40e_ring), GFP_KERNEL);
1142         if (!adapter->tx_rings)
1143                 goto err_out;
1144         adapter->rx_rings = kcalloc(adapter->num_active_queues,
1145                                     sizeof(struct i40e_ring), GFP_KERNEL);
1146         if (!adapter->rx_rings)
1147                 goto err_out;
1148
1149         for (i = 0; i < adapter->num_active_queues; i++) {
1150                 struct i40e_ring *tx_ring;
1151                 struct i40e_ring *rx_ring;
1152
1153                 tx_ring = &adapter->tx_rings[i];
1154
1155                 tx_ring->queue_index = i;
1156                 tx_ring->netdev = adapter->netdev;
1157                 tx_ring->dev = &adapter->pdev->dev;
1158                 tx_ring->count = adapter->tx_desc_count;
1159                 if (adapter->flags & I40E_FLAG_WB_ON_ITR_CAPABLE)
1160                         tx_ring->flags |= I40E_TXR_FLAGS_WB_ON_ITR;
1161
1162                 rx_ring = &adapter->rx_rings[i];
1163                 rx_ring->queue_index = i;
1164                 rx_ring->netdev = adapter->netdev;
1165                 rx_ring->dev = &adapter->pdev->dev;
1166                 rx_ring->count = adapter->rx_desc_count;
1167         }
1168
1169         return 0;
1170
1171 err_out:
1172         i40evf_free_queues(adapter);
1173         return -ENOMEM;
1174 }
1175
1176 /**
1177  * i40evf_set_interrupt_capability - set MSI-X or FAIL if not supported
1178  * @adapter: board private structure to initialize
1179  *
1180  * Attempt to configure the interrupts using the best available
1181  * capabilities of the hardware and the kernel.
1182  **/
1183 static int i40evf_set_interrupt_capability(struct i40evf_adapter *adapter)
1184 {
1185         int vector, v_budget;
1186         int pairs = 0;
1187         int err = 0;
1188
1189         if (!adapter->vsi_res) {
1190                 err = -EIO;
1191                 goto out;
1192         }
1193         pairs = adapter->num_active_queues;
1194
1195         /* It's easy to be greedy for MSI-X vectors, but it really
1196          * doesn't do us much good if we have a lot more vectors
1197          * than CPU's.  So let's be conservative and only ask for
1198          * (roughly) twice the number of vectors as there are CPU's.
1199          */
1200         v_budget = min_t(int, pairs, (int)(num_online_cpus() * 2)) + NONQ_VECS;
1201         v_budget = min_t(int, v_budget, (int)adapter->vf_res->max_vectors);
1202
1203         adapter->msix_entries = kcalloc(v_budget,
1204                                         sizeof(struct msix_entry), GFP_KERNEL);
1205         if (!adapter->msix_entries) {
1206                 err = -ENOMEM;
1207                 goto out;
1208         }
1209
1210         for (vector = 0; vector < v_budget; vector++)
1211                 adapter->msix_entries[vector].entry = vector;
1212
1213         err = i40evf_acquire_msix_vectors(adapter, v_budget);
1214
1215 out:
1216         netif_set_real_num_rx_queues(adapter->netdev, pairs);
1217         netif_set_real_num_tx_queues(adapter->netdev, pairs);
1218         return err;
1219 }
1220
1221 /**
1222  * i40e_config_rss_aq - Prepare for RSS using AQ commands
1223  * @vsi: vsi structure
1224  * @seed: RSS hash seed
1225  * @lut: Lookup table
1226  * @lut_size: Lookup table size
1227  *
1228  * Return 0 on success, negative on failure
1229  **/
1230 static int i40evf_config_rss_aq(struct i40e_vsi *vsi, const u8 *seed,
1231                                 u8 *lut, u16 lut_size)
1232 {
1233         struct i40evf_adapter *adapter = vsi->back;
1234         struct i40e_hw *hw = &adapter->hw;
1235         int ret = 0;
1236
1237         if (!vsi->id)
1238                 return -EINVAL;
1239
1240         if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
1241                 /* bail because we already have a command pending */
1242                 dev_err(&adapter->pdev->dev, "Cannot confiure RSS, command %d pending\n",
1243                         adapter->current_op);
1244                 return -EBUSY;
1245         }
1246
1247         if (seed) {
1248                 struct i40e_aqc_get_set_rss_key_data *rss_key =
1249                         (struct i40e_aqc_get_set_rss_key_data *)seed;
1250                 ret = i40evf_aq_set_rss_key(hw, vsi->id, rss_key);
1251                 if (ret) {
1252                         dev_err(&adapter->pdev->dev, "Cannot set RSS key, err %s aq_err %s\n",
1253                                 i40evf_stat_str(hw, ret),
1254                                 i40evf_aq_str(hw, hw->aq.asq_last_status));
1255                         return ret;
1256                 }
1257         }
1258
1259         if (lut) {
1260                 ret = i40evf_aq_set_rss_lut(hw, vsi->id, false, lut, lut_size);
1261                 if (ret) {
1262                         dev_err(&adapter->pdev->dev,
1263                                 "Cannot set RSS lut, err %s aq_err %s\n",
1264                                 i40evf_stat_str(hw, ret),
1265                                 i40evf_aq_str(hw, hw->aq.asq_last_status));
1266                         return ret;
1267                 }
1268         }
1269
1270         return ret;
1271 }
1272
1273 /**
1274  * i40evf_config_rss_reg - Configure RSS keys and lut by writing registers
1275  * @vsi: Pointer to vsi structure
1276  * @seed: RSS hash seed
1277  * @lut: Lookup table
1278  * @lut_size: Lookup table size
1279  *
1280  * Returns 0 on success, negative on failure
1281  **/
1282 static int i40evf_config_rss_reg(struct i40e_vsi *vsi, const u8 *seed,
1283                                  const u8 *lut, u16 lut_size)
1284 {
1285         struct i40evf_adapter *adapter = vsi->back;
1286         struct i40e_hw *hw = &adapter->hw;
1287         u16 i;
1288
1289         if (seed) {
1290                 u32 *seed_dw = (u32 *)seed;
1291
1292                 for (i = 0; i <= I40E_VFQF_HKEY_MAX_INDEX; i++)
1293                         wr32(hw, I40E_VFQF_HKEY(i), seed_dw[i]);
1294         }
1295
1296         if (lut) {
1297                 u32 *lut_dw = (u32 *)lut;
1298
1299                 if (lut_size != I40EVF_HLUT_ARRAY_SIZE)
1300                         return -EINVAL;
1301
1302                 for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++)
1303                         wr32(hw, I40E_VFQF_HLUT(i), lut_dw[i]);
1304         }
1305         i40e_flush(hw);
1306
1307         return 0;
1308 }
1309
1310 /**
1311  *  * i40evf_get_rss_aq - Get RSS keys and lut by using AQ commands
1312  *  @vsi: Pointer to vsi structure
1313  *  @seed: RSS hash seed
1314  *  @lut: Lookup table
1315  *  @lut_size: Lookup table size
1316  *
1317  *  Return 0 on success, negative on failure
1318  **/
1319 static int i40evf_get_rss_aq(struct i40e_vsi *vsi, const u8 *seed,
1320                              u8 *lut, u16 lut_size)
1321 {
1322         struct i40evf_adapter *adapter = vsi->back;
1323         struct i40e_hw *hw = &adapter->hw;
1324         int ret = 0;
1325
1326         if (seed) {
1327                 ret = i40evf_aq_get_rss_key(hw, vsi->id,
1328                         (struct i40e_aqc_get_set_rss_key_data *)seed);
1329                 if (ret) {
1330                         dev_err(&adapter->pdev->dev,
1331                                 "Cannot get RSS key, err %s aq_err %s\n",
1332                                 i40evf_stat_str(hw, ret),
1333                                 i40evf_aq_str(hw, hw->aq.asq_last_status));
1334                         return ret;
1335                 }
1336         }
1337
1338         if (lut) {
1339                 ret = i40evf_aq_get_rss_lut(hw, vsi->id, seed, lut, lut_size);
1340                 if (ret) {
1341                         dev_err(&adapter->pdev->dev,
1342                                 "Cannot get RSS lut, err %s aq_err %s\n",
1343                                 i40evf_stat_str(hw, ret),
1344                                 i40evf_aq_str(hw, hw->aq.asq_last_status));
1345                         return ret;
1346                 }
1347         }
1348
1349         return ret;
1350 }
1351
1352 /**
1353  *  * i40evf_get_rss_reg - Get RSS keys and lut by reading registers
1354  *  @vsi: Pointer to vsi structure
1355  *  @seed: RSS hash seed
1356  *  @lut: Lookup table
1357  *  @lut_size: Lookup table size
1358  *
1359  *  Returns 0 on success, negative on failure
1360  **/
1361 static int i40evf_get_rss_reg(struct i40e_vsi *vsi, const u8 *seed,
1362                               const u8 *lut, u16 lut_size)
1363 {
1364         struct i40evf_adapter *adapter = vsi->back;
1365         struct i40e_hw *hw = &adapter->hw;
1366         u16 i;
1367
1368         if (seed) {
1369                 u32 *seed_dw = (u32 *)seed;
1370
1371                 for (i = 0; i <= I40E_VFQF_HKEY_MAX_INDEX; i++)
1372                         seed_dw[i] = rd32(hw, I40E_VFQF_HKEY(i));
1373         }
1374
1375         if (lut) {
1376                 u32 *lut_dw = (u32 *)lut;
1377
1378                 if (lut_size != I40EVF_HLUT_ARRAY_SIZE)
1379                         return -EINVAL;
1380
1381                 for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++)
1382                         lut_dw[i] = rd32(hw, I40E_VFQF_HLUT(i));
1383         }
1384
1385         return 0;
1386 }
1387
1388 /**
1389  * i40evf_config_rss - Configure RSS keys and lut
1390  * @vsi: Pointer to vsi structure
1391  * @seed: RSS hash seed
1392  * @lut: Lookup table
1393  * @lut_size: Lookup table size
1394  *
1395  * Returns 0 on success, negative on failure
1396  **/
1397 int i40evf_config_rss(struct i40e_vsi *vsi, const u8 *seed,
1398                       u8 *lut, u16 lut_size)
1399 {
1400         struct i40evf_adapter *adapter = vsi->back;
1401
1402         if (RSS_AQ(adapter))
1403                 return i40evf_config_rss_aq(vsi, seed, lut, lut_size);
1404         else
1405                 return i40evf_config_rss_reg(vsi, seed, lut, lut_size);
1406 }
1407
1408 /**
1409  * i40evf_get_rss - Get RSS keys and lut
1410  * @vsi: Pointer to vsi structure
1411  * @seed: RSS hash seed
1412  * @lut: Lookup table
1413  * @lut_size: Lookup table size
1414  *
1415  * Returns 0 on success, negative on failure
1416  **/
1417 int i40evf_get_rss(struct i40e_vsi *vsi, const u8 *seed, u8 *lut, u16 lut_size)
1418 {
1419         struct i40evf_adapter *adapter = vsi->back;
1420
1421         if (RSS_AQ(adapter))
1422                 return i40evf_get_rss_aq(vsi, seed, lut, lut_size);
1423         else
1424                 return i40evf_get_rss_reg(vsi, seed, lut, lut_size);
1425 }
1426
1427 /**
1428  * i40evf_fill_rss_lut - Fill the lut with default values
1429  * @lut: Lookup table to be filled with
1430  * @rss_table_size: Lookup table size
1431  * @rss_size: Range of queue number for hashing
1432  **/
1433 static void i40evf_fill_rss_lut(u8 *lut, u16 rss_table_size, u16 rss_size)
1434 {
1435         u16 i;
1436
1437         for (i = 0; i < rss_table_size; i++)
1438                 lut[i] = i % rss_size;
1439 }
1440
1441 /**
1442  * i40evf_init_rss - Prepare for RSS
1443  * @adapter: board private structure
1444  *
1445  * Return 0 on success, negative on failure
1446  **/
1447 static int i40evf_init_rss(struct i40evf_adapter *adapter)
1448 {
1449         struct i40e_vsi *vsi = &adapter->vsi;
1450         struct i40e_hw *hw = &adapter->hw;
1451         u8 seed[I40EVF_HKEY_ARRAY_SIZE];
1452         u64 hena;
1453         u8 *lut;
1454         int ret;
1455
1456         /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
1457         hena = I40E_DEFAULT_RSS_HENA;
1458         wr32(hw, I40E_VFQF_HENA(0), (u32)hena);
1459         wr32(hw, I40E_VFQF_HENA(1), (u32)(hena >> 32));
1460
1461         lut = kzalloc(I40EVF_HLUT_ARRAY_SIZE, GFP_KERNEL);
1462         if (!lut)
1463                 return -ENOMEM;
1464
1465         /* Use user configured lut if there is one, otherwise use default */
1466         if (vsi->rss_lut_user)
1467                 memcpy(lut, vsi->rss_lut_user, I40EVF_HLUT_ARRAY_SIZE);
1468         else
1469                 i40evf_fill_rss_lut(lut, I40EVF_HLUT_ARRAY_SIZE,
1470                                     adapter->num_active_queues);
1471
1472         /* Use user configured hash key if there is one, otherwise
1473          * user default.
1474          */
1475         if (vsi->rss_hkey_user)
1476                 memcpy(seed, vsi->rss_hkey_user, I40EVF_HKEY_ARRAY_SIZE);
1477         else
1478                 netdev_rss_key_fill((void *)seed, I40EVF_HKEY_ARRAY_SIZE);
1479         ret = i40evf_config_rss(vsi, seed, lut, I40EVF_HLUT_ARRAY_SIZE);
1480         kfree(lut);
1481
1482         return ret;
1483 }
1484
1485 /**
1486  * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors
1487  * @adapter: board private structure to initialize
1488  *
1489  * We allocate one q_vector per queue interrupt.  If allocation fails we
1490  * return -ENOMEM.
1491  **/
1492 static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
1493 {
1494         int q_idx = 0, num_q_vectors;
1495         struct i40e_q_vector *q_vector;
1496
1497         num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1498         adapter->q_vectors = kcalloc(num_q_vectors, sizeof(*q_vector),
1499                                      GFP_KERNEL);
1500         if (!adapter->q_vectors)
1501                 goto err_out;
1502
1503         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1504                 q_vector = &adapter->q_vectors[q_idx];
1505                 q_vector->adapter = adapter;
1506                 q_vector->vsi = &adapter->vsi;
1507                 q_vector->v_idx = q_idx;
1508                 netif_napi_add(adapter->netdev, &q_vector->napi,
1509                                i40evf_napi_poll, NAPI_POLL_WEIGHT);
1510         }
1511
1512         return 0;
1513
1514 err_out:
1515         while (q_idx) {
1516                 q_idx--;
1517                 q_vector = &adapter->q_vectors[q_idx];
1518                 netif_napi_del(&q_vector->napi);
1519         }
1520         kfree(adapter->q_vectors);
1521         return -ENOMEM;
1522 }
1523
1524 /**
1525  * i40evf_free_q_vectors - Free memory allocated for interrupt vectors
1526  * @adapter: board private structure to initialize
1527  *
1528  * This function frees the memory allocated to the q_vectors.  In addition if
1529  * NAPI is enabled it will delete any references to the NAPI struct prior
1530  * to freeing the q_vector.
1531  **/
1532 static void i40evf_free_q_vectors(struct i40evf_adapter *adapter)
1533 {
1534         int q_idx, num_q_vectors;
1535         int napi_vectors;
1536
1537         num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1538         napi_vectors = adapter->num_active_queues;
1539
1540         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1541                 struct i40e_q_vector *q_vector = &adapter->q_vectors[q_idx];
1542                 if (q_idx < napi_vectors)
1543                         netif_napi_del(&q_vector->napi);
1544         }
1545         kfree(adapter->q_vectors);
1546 }
1547
1548 /**
1549  * i40evf_reset_interrupt_capability - Reset MSIX setup
1550  * @adapter: board private structure
1551  *
1552  **/
1553 void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
1554 {
1555         pci_disable_msix(adapter->pdev);
1556         kfree(adapter->msix_entries);
1557         adapter->msix_entries = NULL;
1558 }
1559
1560 /**
1561  * i40evf_init_interrupt_scheme - Determine if MSIX is supported and init
1562  * @adapter: board private structure to initialize
1563  *
1564  **/
1565 int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter)
1566 {
1567         int err;
1568
1569         err = i40evf_set_interrupt_capability(adapter);
1570         if (err) {
1571                 dev_err(&adapter->pdev->dev,
1572                         "Unable to setup interrupt capabilities\n");
1573                 goto err_set_interrupt;
1574         }
1575
1576         err = i40evf_alloc_q_vectors(adapter);
1577         if (err) {
1578                 dev_err(&adapter->pdev->dev,
1579                         "Unable to allocate memory for queue vectors\n");
1580                 goto err_alloc_q_vectors;
1581         }
1582
1583         err = i40evf_alloc_queues(adapter);
1584         if (err) {
1585                 dev_err(&adapter->pdev->dev,
1586                         "Unable to allocate memory for queues\n");
1587                 goto err_alloc_queues;
1588         }
1589
1590         dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
1591                  (adapter->num_active_queues > 1) ? "Enabled" : "Disabled",
1592                  adapter->num_active_queues);
1593
1594         return 0;
1595 err_alloc_queues:
1596         i40evf_free_q_vectors(adapter);
1597 err_alloc_q_vectors:
1598         i40evf_reset_interrupt_capability(adapter);
1599 err_set_interrupt:
1600         return err;
1601 }
1602
1603 /**
1604  * i40evf_clear_rss_config_user - Clear user configurations of RSS
1605  * @vsi: Pointer to VSI structure
1606  **/
1607 static void i40evf_clear_rss_config_user(struct i40e_vsi *vsi)
1608 {
1609         if (!vsi)
1610                 return;
1611
1612         kfree(vsi->rss_hkey_user);
1613         vsi->rss_hkey_user = NULL;
1614
1615         kfree(vsi->rss_lut_user);
1616         vsi->rss_lut_user = NULL;
1617 }
1618
1619 /**
1620  * i40evf_watchdog_timer - Periodic call-back timer
1621  * @data: pointer to adapter disguised as unsigned long
1622  **/
1623 static void i40evf_watchdog_timer(unsigned long data)
1624 {
1625         struct i40evf_adapter *adapter = (struct i40evf_adapter *)data;
1626
1627         schedule_work(&adapter->watchdog_task);
1628         /* timer will be rescheduled in watchdog task */
1629 }
1630
1631 /**
1632  * i40evf_watchdog_task - Periodic call-back task
1633  * @work: pointer to work_struct
1634  **/
1635 static void i40evf_watchdog_task(struct work_struct *work)
1636 {
1637         struct i40evf_adapter *adapter = container_of(work,
1638                                                       struct i40evf_adapter,
1639                                                       watchdog_task);
1640         struct i40e_hw *hw = &adapter->hw;
1641         u32 reg_val;
1642
1643         if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
1644                 goto restart_watchdog;
1645
1646         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1647                 reg_val = rd32(hw, I40E_VFGEN_RSTAT) &
1648                           I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1649                 if ((reg_val == I40E_VFR_VFACTIVE) ||
1650                     (reg_val == I40E_VFR_COMPLETED)) {
1651                         /* A chance for redemption! */
1652                         dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
1653                         adapter->state = __I40EVF_STARTUP;
1654                         adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1655                         schedule_delayed_work(&adapter->init_task, 10);
1656                         clear_bit(__I40EVF_IN_CRITICAL_TASK,
1657                                   &adapter->crit_section);
1658                         /* Don't reschedule the watchdog, since we've restarted
1659                          * the init task. When init_task contacts the PF and
1660                          * gets everything set up again, it'll restart the
1661                          * watchdog for us. Down, boy. Sit. Stay. Woof.
1662                          */
1663                         return;
1664                 }
1665                 adapter->aq_required = 0;
1666                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1667                 goto watchdog_done;
1668         }
1669
1670         if ((adapter->state < __I40EVF_DOWN) ||
1671             (adapter->flags & I40EVF_FLAG_RESET_PENDING))
1672                 goto watchdog_done;
1673
1674         /* check for reset */
1675         reg_val = rd32(hw, I40E_VF_ARQLEN1) & I40E_VF_ARQLEN1_ARQENABLE_MASK;
1676         if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) && !reg_val) {
1677                 adapter->state = __I40EVF_RESETTING;
1678                 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1679                 dev_err(&adapter->pdev->dev, "Hardware reset detected\n");
1680                 schedule_work(&adapter->reset_task);
1681                 adapter->aq_required = 0;
1682                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1683                 goto watchdog_done;
1684         }
1685
1686         /* Process admin queue tasks. After init, everything gets done
1687          * here so we don't race on the admin queue.
1688          */
1689         if (adapter->current_op) {
1690                 if (!i40evf_asq_done(hw)) {
1691                         dev_dbg(&adapter->pdev->dev, "Admin queue timeout\n");
1692                         i40evf_send_api_ver(adapter);
1693                 }
1694                 goto watchdog_done;
1695         }
1696         if (adapter->aq_required & I40EVF_FLAG_AQ_GET_CONFIG) {
1697                 i40evf_send_vf_config_msg(adapter);
1698                 goto watchdog_done;
1699         }
1700
1701         if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
1702                 i40evf_disable_queues(adapter);
1703                 goto watchdog_done;
1704         }
1705
1706         if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
1707                 i40evf_map_queues(adapter);
1708                 goto watchdog_done;
1709         }
1710
1711         if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
1712                 i40evf_add_ether_addrs(adapter);
1713                 goto watchdog_done;
1714         }
1715
1716         if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
1717                 i40evf_add_vlans(adapter);
1718                 goto watchdog_done;
1719         }
1720
1721         if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
1722                 i40evf_del_ether_addrs(adapter);
1723                 goto watchdog_done;
1724         }
1725
1726         if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
1727                 i40evf_del_vlans(adapter);
1728                 goto watchdog_done;
1729         }
1730
1731         if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
1732                 i40evf_configure_queues(adapter);
1733                 goto watchdog_done;
1734         }
1735
1736         if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
1737                 i40evf_enable_queues(adapter);
1738                 goto watchdog_done;
1739         }
1740
1741         if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_RSS) {
1742                 /* This message goes straight to the firmware, not the
1743                  * PF, so we don't have to set current_op as we will
1744                  * not get a response through the ARQ.
1745                  */
1746                 i40evf_init_rss(adapter);
1747                 adapter->aq_required &= ~I40EVF_FLAG_AQ_CONFIGURE_RSS;
1748                 goto watchdog_done;
1749         }
1750
1751         if (adapter->state == __I40EVF_RUNNING)
1752                 i40evf_request_stats(adapter);
1753 watchdog_done:
1754         if (adapter->state == __I40EVF_RUNNING) {
1755                 i40evf_irq_enable_queues(adapter, ~0);
1756                 i40evf_fire_sw_int(adapter, 0xFF);
1757         } else {
1758                 i40evf_fire_sw_int(adapter, 0x1);
1759         }
1760
1761         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1762 restart_watchdog:
1763         if (adapter->state == __I40EVF_REMOVE)
1764                 return;
1765         if (adapter->aq_required)
1766                 mod_timer(&adapter->watchdog_timer,
1767                           jiffies + msecs_to_jiffies(20));
1768         else
1769                 mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
1770         schedule_work(&adapter->adminq_task);
1771 }
1772
1773 #define I40EVF_RESET_WAIT_MS 10
1774 #define I40EVF_RESET_WAIT_COUNT 500
1775 /**
1776  * i40evf_reset_task - Call-back task to handle hardware reset
1777  * @work: pointer to work_struct
1778  *
1779  * During reset we need to shut down and reinitialize the admin queue
1780  * before we can use it to communicate with the PF again. We also clear
1781  * and reinit the rings because that context is lost as well.
1782  **/
1783 static void i40evf_reset_task(struct work_struct *work)
1784 {
1785         struct i40evf_adapter *adapter = container_of(work,
1786                                                       struct i40evf_adapter,
1787                                                       reset_task);
1788         struct net_device *netdev = adapter->netdev;
1789         struct i40e_hw *hw = &adapter->hw;
1790         struct i40evf_vlan_filter *vlf;
1791         struct i40evf_mac_filter *f;
1792         u32 reg_val;
1793         int i = 0, err;
1794
1795         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1796                                 &adapter->crit_section))
1797                 usleep_range(500, 1000);
1798
1799         i40evf_misc_irq_disable(adapter);
1800         if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) {
1801                 adapter->flags &= ~I40EVF_FLAG_RESET_NEEDED;
1802                 /* Restart the AQ here. If we have been reset but didn't
1803                  * detect it, or if the PF had to reinit, our AQ will be hosed.
1804                  */
1805                 i40evf_shutdown_adminq(hw);
1806                 i40evf_init_adminq(hw);
1807                 i40evf_request_reset(adapter);
1808         }
1809         adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1810
1811         /* poll until we see the reset actually happen */
1812         for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1813                 reg_val = rd32(hw, I40E_VF_ARQLEN1) &
1814                           I40E_VF_ARQLEN1_ARQENABLE_MASK;
1815                 if (!reg_val)
1816                         break;
1817                 usleep_range(5000, 10000);
1818         }
1819         if (i == I40EVF_RESET_WAIT_COUNT) {
1820                 dev_info(&adapter->pdev->dev, "Never saw reset\n");
1821                 goto continue_reset; /* act like the reset happened */
1822         }
1823
1824         /* wait until the reset is complete and the PF is responding to us */
1825         for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1826                 reg_val = rd32(hw, I40E_VFGEN_RSTAT) &
1827                           I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1828                 if (reg_val == I40E_VFR_VFACTIVE)
1829                         break;
1830                 msleep(I40EVF_RESET_WAIT_MS);
1831         }
1832         /* extra wait to make sure minimum wait is met */
1833         msleep(I40EVF_RESET_WAIT_MS);
1834         if (i == I40EVF_RESET_WAIT_COUNT) {
1835                 struct i40evf_mac_filter *ftmp;
1836                 struct i40evf_vlan_filter *fv, *fvtmp;
1837
1838                 /* reset never finished */
1839                 dev_err(&adapter->pdev->dev, "Reset never finished (%x)\n",
1840                         reg_val);
1841                 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
1842
1843                 if (netif_running(adapter->netdev)) {
1844                         set_bit(__I40E_DOWN, &adapter->vsi.state);
1845                         netif_carrier_off(netdev);
1846                         netif_tx_disable(netdev);
1847                         i40evf_napi_disable_all(adapter);
1848                         i40evf_irq_disable(adapter);
1849                         i40evf_free_traffic_irqs(adapter);
1850                         i40evf_free_all_tx_resources(adapter);
1851                         i40evf_free_all_rx_resources(adapter);
1852                 }
1853
1854                 /* Delete all of the filters, both MAC and VLAN. */
1855                 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list,
1856                                          list) {
1857                         list_del(&f->list);
1858                         kfree(f);
1859                 }
1860
1861                 list_for_each_entry_safe(fv, fvtmp, &adapter->vlan_filter_list,
1862                                          list) {
1863                         list_del(&fv->list);
1864                         kfree(fv);
1865                 }
1866
1867                 i40evf_free_misc_irq(adapter);
1868                 i40evf_reset_interrupt_capability(adapter);
1869                 i40evf_free_queues(adapter);
1870                 i40evf_free_q_vectors(adapter);
1871                 kfree(adapter->vf_res);
1872                 i40evf_shutdown_adminq(hw);
1873                 adapter->netdev->flags &= ~IFF_UP;
1874                 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1875                 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1876                 dev_info(&adapter->pdev->dev, "Reset task did not complete, VF disabled\n");
1877                 return; /* Do not attempt to reinit. It's dead, Jim. */
1878         }
1879
1880 continue_reset:
1881         if (netif_running(adapter->netdev)) {
1882                 netif_carrier_off(netdev);
1883                 netif_tx_stop_all_queues(netdev);
1884                 i40evf_napi_disable_all(adapter);
1885         }
1886         i40evf_irq_disable(adapter);
1887
1888         adapter->state = __I40EVF_RESETTING;
1889         adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1890
1891         /* free the Tx/Rx rings and descriptors, might be better to just
1892          * re-use them sometime in the future
1893          */
1894         i40evf_free_all_rx_resources(adapter);
1895         i40evf_free_all_tx_resources(adapter);
1896
1897         /* kill and reinit the admin queue */
1898         if (i40evf_shutdown_adminq(hw))
1899                 dev_warn(&adapter->pdev->dev, "Failed to shut down adminq\n");
1900         adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1901         err = i40evf_init_adminq(hw);
1902         if (err)
1903                 dev_info(&adapter->pdev->dev, "Failed to init adminq: %d\n",
1904                          err);
1905
1906         adapter->aq_required = I40EVF_FLAG_AQ_GET_CONFIG;
1907         adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
1908
1909         /* re-add all MAC filters */
1910         list_for_each_entry(f, &adapter->mac_filter_list, list) {
1911                 f->add = true;
1912         }
1913         /* re-add all VLAN filters */
1914         list_for_each_entry(vlf, &adapter->vlan_filter_list, list) {
1915                 vlf->add = true;
1916         }
1917         adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
1918         adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
1919         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1920         i40evf_misc_irq_enable(adapter);
1921
1922         mod_timer(&adapter->watchdog_timer, jiffies + 2);
1923
1924         if (netif_running(adapter->netdev)) {
1925                 /* allocate transmit descriptors */
1926                 err = i40evf_setup_all_tx_resources(adapter);
1927                 if (err)
1928                         goto reset_err;
1929
1930                 /* allocate receive descriptors */
1931                 err = i40evf_setup_all_rx_resources(adapter);
1932                 if (err)
1933                         goto reset_err;
1934
1935                 i40evf_configure(adapter);
1936
1937                 err = i40evf_up_complete(adapter);
1938                 if (err)
1939                         goto reset_err;
1940
1941                 i40evf_irq_enable(adapter, true);
1942         } else {
1943                 adapter->state = __I40EVF_DOWN;
1944         }
1945
1946         return;
1947 reset_err:
1948         dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
1949         i40evf_close(adapter->netdev);
1950 }
1951
1952 /**
1953  * i40evf_adminq_task - worker thread to clean the admin queue
1954  * @work: pointer to work_struct containing our data
1955  **/
1956 static void i40evf_adminq_task(struct work_struct *work)
1957 {
1958         struct i40evf_adapter *adapter =
1959                 container_of(work, struct i40evf_adapter, adminq_task);
1960         struct i40e_hw *hw = &adapter->hw;
1961         struct i40e_arq_event_info event;
1962         struct i40e_virtchnl_msg *v_msg;
1963         i40e_status ret;
1964         u32 val, oldval;
1965         u16 pending;
1966
1967         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
1968                 goto out;
1969
1970         event.buf_len = I40EVF_MAX_AQ_BUF_SIZE;
1971         event.msg_buf = kzalloc(event.buf_len, GFP_KERNEL);
1972         if (!event.msg_buf)
1973                 goto out;
1974
1975         v_msg = (struct i40e_virtchnl_msg *)&event.desc;
1976         do {
1977                 ret = i40evf_clean_arq_element(hw, &event, &pending);
1978                 if (ret || !v_msg->v_opcode)
1979                         break; /* No event to process or error cleaning ARQ */
1980
1981                 i40evf_virtchnl_completion(adapter, v_msg->v_opcode,
1982                                            v_msg->v_retval, event.msg_buf,
1983                                            event.msg_len);
1984                 if (pending != 0)
1985                         memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
1986         } while (pending);
1987
1988         if ((adapter->flags &
1989              (I40EVF_FLAG_RESET_PENDING | I40EVF_FLAG_RESET_NEEDED)) ||
1990             adapter->state == __I40EVF_RESETTING)
1991                 goto freedom;
1992
1993         /* check for error indications */
1994         val = rd32(hw, hw->aq.arq.len);
1995         oldval = val;
1996         if (val & I40E_VF_ARQLEN1_ARQVFE_MASK) {
1997                 dev_info(&adapter->pdev->dev, "ARQ VF Error detected\n");
1998                 val &= ~I40E_VF_ARQLEN1_ARQVFE_MASK;
1999         }
2000         if (val & I40E_VF_ARQLEN1_ARQOVFL_MASK) {
2001                 dev_info(&adapter->pdev->dev, "ARQ Overflow Error detected\n");
2002                 val &= ~I40E_VF_ARQLEN1_ARQOVFL_MASK;
2003         }
2004         if (val & I40E_VF_ARQLEN1_ARQCRIT_MASK) {
2005                 dev_info(&adapter->pdev->dev, "ARQ Critical Error detected\n");
2006                 val &= ~I40E_VF_ARQLEN1_ARQCRIT_MASK;
2007         }
2008         if (oldval != val)
2009                 wr32(hw, hw->aq.arq.len, val);
2010
2011         val = rd32(hw, hw->aq.asq.len);
2012         oldval = val;
2013         if (val & I40E_VF_ATQLEN1_ATQVFE_MASK) {
2014                 dev_info(&adapter->pdev->dev, "ASQ VF Error detected\n");
2015                 val &= ~I40E_VF_ATQLEN1_ATQVFE_MASK;
2016         }
2017         if (val & I40E_VF_ATQLEN1_ATQOVFL_MASK) {
2018                 dev_info(&adapter->pdev->dev, "ASQ Overflow Error detected\n");
2019                 val &= ~I40E_VF_ATQLEN1_ATQOVFL_MASK;
2020         }
2021         if (val & I40E_VF_ATQLEN1_ATQCRIT_MASK) {
2022                 dev_info(&adapter->pdev->dev, "ASQ Critical Error detected\n");
2023                 val &= ~I40E_VF_ATQLEN1_ATQCRIT_MASK;
2024         }
2025         if (oldval != val)
2026                 wr32(hw, hw->aq.asq.len, val);
2027
2028 freedom:
2029         kfree(event.msg_buf);
2030 out:
2031         /* re-enable Admin queue interrupt cause */
2032         i40evf_misc_irq_enable(adapter);
2033 }
2034
2035 /**
2036  * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
2037  * @adapter: board private structure
2038  *
2039  * Free all transmit software resources
2040  **/
2041 void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
2042 {
2043         int i;
2044
2045         if (!adapter->tx_rings)
2046                 return;
2047
2048         for (i = 0; i < adapter->num_active_queues; i++)
2049                 if (adapter->tx_rings[i].desc)
2050                         i40evf_free_tx_resources(&adapter->tx_rings[i]);
2051 }
2052
2053 /**
2054  * i40evf_setup_all_tx_resources - allocate all queues Tx resources
2055  * @adapter: board private structure
2056  *
2057  * If this function returns with an error, then it's possible one or
2058  * more of the rings is populated (while the rest are not).  It is the
2059  * callers duty to clean those orphaned rings.
2060  *
2061  * Return 0 on success, negative on failure
2062  **/
2063 static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter)
2064 {
2065         int i, err = 0;
2066
2067         for (i = 0; i < adapter->num_active_queues; i++) {
2068                 adapter->tx_rings[i].count = adapter->tx_desc_count;
2069                 err = i40evf_setup_tx_descriptors(&adapter->tx_rings[i]);
2070                 if (!err)
2071                         continue;
2072                 dev_err(&adapter->pdev->dev,
2073                         "Allocation for Tx Queue %u failed\n", i);
2074                 break;
2075         }
2076
2077         return err;
2078 }
2079
2080 /**
2081  * i40evf_setup_all_rx_resources - allocate all queues Rx resources
2082  * @adapter: board private structure
2083  *
2084  * If this function returns with an error, then it's possible one or
2085  * more of the rings is populated (while the rest are not).  It is the
2086  * callers duty to clean those orphaned rings.
2087  *
2088  * Return 0 on success, negative on failure
2089  **/
2090 static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter)
2091 {
2092         int i, err = 0;
2093
2094         for (i = 0; i < adapter->num_active_queues; i++) {
2095                 adapter->rx_rings[i].count = adapter->rx_desc_count;
2096                 err = i40evf_setup_rx_descriptors(&adapter->rx_rings[i]);
2097                 if (!err)
2098                         continue;
2099                 dev_err(&adapter->pdev->dev,
2100                         "Allocation for Rx Queue %u failed\n", i);
2101                 break;
2102         }
2103         return err;
2104 }
2105
2106 /**
2107  * i40evf_free_all_rx_resources - Free Rx Resources for All Queues
2108  * @adapter: board private structure
2109  *
2110  * Free all receive software resources
2111  **/
2112 void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
2113 {
2114         int i;
2115
2116         if (!adapter->rx_rings)
2117                 return;
2118
2119         for (i = 0; i < adapter->num_active_queues; i++)
2120                 if (adapter->rx_rings[i].desc)
2121                         i40evf_free_rx_resources(&adapter->rx_rings[i]);
2122 }
2123
2124 /**
2125  * i40evf_open - Called when a network interface is made active
2126  * @netdev: network interface device structure
2127  *
2128  * Returns 0 on success, negative value on failure
2129  *
2130  * The open entry point is called when a network interface is made
2131  * active by the system (IFF_UP).  At this point all resources needed
2132  * for transmit and receive operations are allocated, the interrupt
2133  * handler is registered with the OS, the watchdog timer is started,
2134  * and the stack is notified that the interface is ready.
2135  **/
2136 static int i40evf_open(struct net_device *netdev)
2137 {
2138         struct i40evf_adapter *adapter = netdev_priv(netdev);
2139         int err;
2140
2141         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
2142                 dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
2143                 return -EIO;
2144         }
2145         if (adapter->state != __I40EVF_DOWN || adapter->aq_required)
2146                 return -EBUSY;
2147
2148         /* allocate transmit descriptors */
2149         err = i40evf_setup_all_tx_resources(adapter);
2150         if (err)
2151                 goto err_setup_tx;
2152
2153         /* allocate receive descriptors */
2154         err = i40evf_setup_all_rx_resources(adapter);
2155         if (err)
2156                 goto err_setup_rx;
2157
2158         /* clear any pending interrupts, may auto mask */
2159         err = i40evf_request_traffic_irqs(adapter, netdev->name);
2160         if (err)
2161                 goto err_req_irq;
2162
2163         i40evf_add_filter(adapter, adapter->hw.mac.addr);
2164         i40evf_configure(adapter);
2165
2166         err = i40evf_up_complete(adapter);
2167         if (err)
2168                 goto err_req_irq;
2169
2170         i40evf_irq_enable(adapter, true);
2171
2172         return 0;
2173
2174 err_req_irq:
2175         i40evf_down(adapter);
2176         i40evf_free_traffic_irqs(adapter);
2177 err_setup_rx:
2178         i40evf_free_all_rx_resources(adapter);
2179 err_setup_tx:
2180         i40evf_free_all_tx_resources(adapter);
2181
2182         return err;
2183 }
2184
2185 /**
2186  * i40evf_close - Disables a network interface
2187  * @netdev: network interface device structure
2188  *
2189  * Returns 0, this is not allowed to fail
2190  *
2191  * The close entry point is called when an interface is de-activated
2192  * by the OS.  The hardware is still under the drivers control, but
2193  * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
2194  * are freed, along with all transmit and receive resources.
2195  **/
2196 static int i40evf_close(struct net_device *netdev)
2197 {
2198         struct i40evf_adapter *adapter = netdev_priv(netdev);
2199
2200         if (adapter->state <= __I40EVF_DOWN)
2201                 return 0;
2202
2203
2204         set_bit(__I40E_DOWN, &adapter->vsi.state);
2205
2206         i40evf_down(adapter);
2207         adapter->state = __I40EVF_DOWN;
2208         i40evf_free_traffic_irqs(adapter);
2209
2210         return 0;
2211 }
2212
2213 /**
2214  * i40evf_get_stats - Get System Network Statistics
2215  * @netdev: network interface device structure
2216  *
2217  * Returns the address of the device statistics structure.
2218  * The statistics are actually updated from the timer callback.
2219  **/
2220 static struct net_device_stats *i40evf_get_stats(struct net_device *netdev)
2221 {
2222         struct i40evf_adapter *adapter = netdev_priv(netdev);
2223
2224         /* only return the current stats */
2225         return &adapter->net_stats;
2226 }
2227
2228 /**
2229  * i40evf_change_mtu - Change the Maximum Transfer Unit
2230  * @netdev: network interface device structure
2231  * @new_mtu: new value for maximum frame size
2232  *
2233  * Returns 0 on success, negative on failure
2234  **/
2235 static int i40evf_change_mtu(struct net_device *netdev, int new_mtu)
2236 {
2237         struct i40evf_adapter *adapter = netdev_priv(netdev);
2238         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
2239
2240         if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
2241                 return -EINVAL;
2242
2243         netdev->mtu = new_mtu;
2244         adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
2245         schedule_work(&adapter->reset_task);
2246
2247         return 0;
2248 }
2249
2250 static const struct net_device_ops i40evf_netdev_ops = {
2251         .ndo_open               = i40evf_open,
2252         .ndo_stop               = i40evf_close,
2253         .ndo_start_xmit         = i40evf_xmit_frame,
2254         .ndo_get_stats          = i40evf_get_stats,
2255         .ndo_set_rx_mode        = i40evf_set_rx_mode,
2256         .ndo_validate_addr      = eth_validate_addr,
2257         .ndo_set_mac_address    = i40evf_set_mac,
2258         .ndo_change_mtu         = i40evf_change_mtu,
2259         .ndo_tx_timeout         = i40evf_tx_timeout,
2260         .ndo_vlan_rx_add_vid    = i40evf_vlan_rx_add_vid,
2261         .ndo_vlan_rx_kill_vid   = i40evf_vlan_rx_kill_vid,
2262 #ifdef CONFIG_NET_POLL_CONTROLLER
2263         .ndo_poll_controller    = i40evf_netpoll,
2264 #endif
2265 };
2266
2267 /**
2268  * i40evf_check_reset_complete - check that VF reset is complete
2269  * @hw: pointer to hw struct
2270  *
2271  * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
2272  **/
2273 static int i40evf_check_reset_complete(struct i40e_hw *hw)
2274 {
2275         u32 rstat;
2276         int i;
2277
2278         for (i = 0; i < 100; i++) {
2279                 rstat = rd32(hw, I40E_VFGEN_RSTAT) &
2280                             I40E_VFGEN_RSTAT_VFR_STATE_MASK;
2281                 if ((rstat == I40E_VFR_VFACTIVE) ||
2282                     (rstat == I40E_VFR_COMPLETED))
2283                         return 0;
2284                 usleep_range(10, 20);
2285         }
2286         return -EBUSY;
2287 }
2288
2289 /**
2290  * i40evf_process_config - Process the config information we got from the PF
2291  * @adapter: board private structure
2292  *
2293  * Verify that we have a valid config struct, and set up our netdev features
2294  * and our VSI struct.
2295  **/
2296 int i40evf_process_config(struct i40evf_adapter *adapter)
2297 {
2298         struct net_device *netdev = adapter->netdev;
2299         int i;
2300
2301         /* got VF config message back from PF, now we can parse it */
2302         for (i = 0; i < adapter->vf_res->num_vsis; i++) {
2303                 if (adapter->vf_res->vsi_res[i].vsi_type == I40E_VSI_SRIOV)
2304                         adapter->vsi_res = &adapter->vf_res->vsi_res[i];
2305         }
2306         if (!adapter->vsi_res) {
2307                 dev_err(&adapter->pdev->dev, "No LAN VSI found\n");
2308                 return -ENODEV;
2309         }
2310
2311         if (adapter->vf_res->vf_offload_flags
2312             & I40E_VIRTCHNL_VF_OFFLOAD_VLAN) {
2313                 netdev->vlan_features = netdev->features &
2314                                         ~(NETIF_F_HW_VLAN_CTAG_TX |
2315                                           NETIF_F_HW_VLAN_CTAG_RX |
2316                                           NETIF_F_HW_VLAN_CTAG_FILTER);
2317                 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX |
2318                                     NETIF_F_HW_VLAN_CTAG_RX |
2319                                     NETIF_F_HW_VLAN_CTAG_FILTER;
2320         }
2321         netdev->features |= NETIF_F_HIGHDMA |
2322                             NETIF_F_SG |
2323                             NETIF_F_IP_CSUM |
2324                             NETIF_F_SCTP_CRC |
2325                             NETIF_F_IPV6_CSUM |
2326                             NETIF_F_TSO |
2327                             NETIF_F_TSO6 |
2328                             NETIF_F_RXCSUM |
2329                             NETIF_F_GRO;
2330
2331         /* copy netdev features into list of user selectable features */
2332         netdev->hw_features |= netdev->features;
2333         netdev->hw_features &= ~NETIF_F_RXCSUM;
2334
2335         adapter->vsi.id = adapter->vsi_res->vsi_id;
2336
2337         adapter->vsi.back = adapter;
2338         adapter->vsi.base_vector = 1;
2339         adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
2340         adapter->vsi.rx_itr_setting = (I40E_ITR_DYNAMIC |
2341                                        ITR_REG_TO_USEC(I40E_ITR_RX_DEF));
2342         adapter->vsi.tx_itr_setting = (I40E_ITR_DYNAMIC |
2343                                        ITR_REG_TO_USEC(I40E_ITR_TX_DEF));
2344         adapter->vsi.netdev = adapter->netdev;
2345         adapter->vsi.qs_handle = adapter->vsi_res->qset_handle;
2346         return 0;
2347 }
2348
2349 /**
2350  * i40evf_init_task - worker thread to perform delayed initialization
2351  * @work: pointer to work_struct containing our data
2352  *
2353  * This task completes the work that was begun in probe. Due to the nature
2354  * of VF-PF communications, we may need to wait tens of milliseconds to get
2355  * responses back from the PF. Rather than busy-wait in probe and bog down the
2356  * whole system, we'll do it in a task so we can sleep.
2357  * This task only runs during driver init. Once we've established
2358  * communications with the PF driver and set up our netdev, the watchdog
2359  * takes over.
2360  **/
2361 static void i40evf_init_task(struct work_struct *work)
2362 {
2363         struct i40evf_adapter *adapter = container_of(work,
2364                                                       struct i40evf_adapter,
2365                                                       init_task.work);
2366         struct net_device *netdev = adapter->netdev;
2367         struct i40e_hw *hw = &adapter->hw;
2368         struct pci_dev *pdev = adapter->pdev;
2369         int err, bufsz;
2370
2371         switch (adapter->state) {
2372         case __I40EVF_STARTUP:
2373                 /* driver loaded, probe complete */
2374                 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
2375                 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
2376                 err = i40e_set_mac_type(hw);
2377                 if (err) {
2378                         dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
2379                                 err);
2380                         goto err;
2381                 }
2382                 err = i40evf_check_reset_complete(hw);
2383                 if (err) {
2384                         dev_info(&pdev->dev, "Device is still in reset (%d), retrying\n",
2385                                  err);
2386                         goto err;
2387                 }
2388                 hw->aq.num_arq_entries = I40EVF_AQ_LEN;
2389                 hw->aq.num_asq_entries = I40EVF_AQ_LEN;
2390                 hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2391                 hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2392
2393                 err = i40evf_init_adminq(hw);
2394                 if (err) {
2395                         dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
2396                                 err);
2397                         goto err;
2398                 }
2399                 err = i40evf_send_api_ver(adapter);
2400                 if (err) {
2401                         dev_err(&pdev->dev, "Unable to send to PF (%d)\n", err);
2402                         i40evf_shutdown_adminq(hw);
2403                         goto err;
2404                 }
2405                 adapter->state = __I40EVF_INIT_VERSION_CHECK;
2406                 goto restart;
2407         case __I40EVF_INIT_VERSION_CHECK:
2408                 if (!i40evf_asq_done(hw)) {
2409                         dev_err(&pdev->dev, "Admin queue command never completed\n");
2410                         i40evf_shutdown_adminq(hw);
2411                         adapter->state = __I40EVF_STARTUP;
2412                         goto err;
2413                 }
2414
2415                 /* aq msg sent, awaiting reply */
2416                 err = i40evf_verify_api_ver(adapter);
2417                 if (err) {
2418                         if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
2419                                 err = i40evf_send_api_ver(adapter);
2420                         else
2421                                 dev_err(&pdev->dev, "Unsupported PF API version %d.%d, expected %d.%d\n",
2422                                         adapter->pf_version.major,
2423                                         adapter->pf_version.minor,
2424                                         I40E_VIRTCHNL_VERSION_MAJOR,
2425                                         I40E_VIRTCHNL_VERSION_MINOR);
2426                         goto err;
2427                 }
2428                 err = i40evf_send_vf_config_msg(adapter);
2429                 if (err) {
2430                         dev_err(&pdev->dev, "Unable to send config request (%d)\n",
2431                                 err);
2432                         goto err;
2433                 }
2434                 adapter->state = __I40EVF_INIT_GET_RESOURCES;
2435                 goto restart;
2436         case __I40EVF_INIT_GET_RESOURCES:
2437                 /* aq msg sent, awaiting reply */
2438                 if (!adapter->vf_res) {
2439                         bufsz = sizeof(struct i40e_virtchnl_vf_resource) +
2440                                 (I40E_MAX_VF_VSI *
2441                                  sizeof(struct i40e_virtchnl_vsi_resource));
2442                         adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
2443                         if (!adapter->vf_res)
2444                                 goto err;
2445                 }
2446                 err = i40evf_get_vf_config(adapter);
2447                 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK) {
2448                         err = i40evf_send_vf_config_msg(adapter);
2449                         goto err;
2450                 } else if (err == I40E_ERR_PARAM) {
2451                         /* We only get ERR_PARAM if the device is in a very bad
2452                          * state or if we've been disabled for previous bad
2453                          * behavior. Either way, we're done now.
2454                          */
2455                         i40evf_shutdown_adminq(hw);
2456                         dev_err(&pdev->dev, "Unable to get VF config due to PF error condition, not retrying\n");
2457                         return;
2458                 }
2459                 if (err) {
2460                         dev_err(&pdev->dev, "Unable to get VF config (%d)\n",
2461                                 err);
2462                         goto err_alloc;
2463                 }
2464                 adapter->state = __I40EVF_INIT_SW;
2465                 break;
2466         default:
2467                 goto err_alloc;
2468         }
2469         if (i40evf_process_config(adapter))
2470                 goto err_alloc;
2471         adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
2472
2473         adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
2474
2475         netdev->netdev_ops = &i40evf_netdev_ops;
2476         i40evf_set_ethtool_ops(netdev);
2477         netdev->watchdog_timeo = 5 * HZ;
2478
2479         if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
2480                 dev_info(&pdev->dev, "Invalid MAC address %pM, using random\n",
2481                          adapter->hw.mac.addr);
2482                 eth_hw_addr_random(netdev);
2483                 ether_addr_copy(adapter->hw.mac.addr, netdev->dev_addr);
2484         } else {
2485                 adapter->flags |= I40EVF_FLAG_ADDR_SET_BY_PF;
2486                 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
2487                 ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
2488         }
2489
2490         init_timer(&adapter->watchdog_timer);
2491         adapter->watchdog_timer.function = &i40evf_watchdog_timer;
2492         adapter->watchdog_timer.data = (unsigned long)adapter;
2493         mod_timer(&adapter->watchdog_timer, jiffies + 1);
2494
2495         adapter->num_active_queues = min_t(int,
2496                                            adapter->vsi_res->num_queue_pairs,
2497                                            (int)(num_online_cpus()));
2498         adapter->tx_desc_count = I40EVF_DEFAULT_TXD;
2499         adapter->rx_desc_count = I40EVF_DEFAULT_RXD;
2500         err = i40evf_init_interrupt_scheme(adapter);
2501         if (err)
2502                 goto err_sw_init;
2503         i40evf_map_rings_to_vectors(adapter);
2504         if (adapter->vf_res->vf_offload_flags &
2505                     I40E_VIRTCHNL_VF_OFFLOAD_WB_ON_ITR)
2506                 adapter->flags |= I40EVF_FLAG_WB_ON_ITR_CAPABLE;
2507         if (!RSS_AQ(adapter))
2508                 i40evf_init_rss(adapter);
2509         err = i40evf_request_misc_irq(adapter);
2510         if (err)
2511                 goto err_sw_init;
2512
2513         netif_carrier_off(netdev);
2514
2515         if (!adapter->netdev_registered) {
2516                 err = register_netdev(netdev);
2517                 if (err)
2518                         goto err_register;
2519         }
2520
2521         adapter->netdev_registered = true;
2522
2523         netif_tx_stop_all_queues(netdev);
2524
2525         dev_info(&pdev->dev, "MAC address: %pM\n", adapter->hw.mac.addr);
2526         if (netdev->features & NETIF_F_GRO)
2527                 dev_info(&pdev->dev, "GRO is enabled\n");
2528
2529         adapter->state = __I40EVF_DOWN;
2530         set_bit(__I40E_DOWN, &adapter->vsi.state);
2531         i40evf_misc_irq_enable(adapter);
2532
2533         if (RSS_AQ(adapter)) {
2534                 adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_RSS;
2535                 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
2536         } else {
2537                 i40evf_init_rss(adapter);
2538         }
2539         return;
2540 restart:
2541         schedule_delayed_work(&adapter->init_task, msecs_to_jiffies(30));
2542         return;
2543
2544 err_register:
2545         i40evf_free_misc_irq(adapter);
2546 err_sw_init:
2547         i40evf_reset_interrupt_capability(adapter);
2548 err_alloc:
2549         kfree(adapter->vf_res);
2550         adapter->vf_res = NULL;
2551 err:
2552         /* Things went into the weeds, so try again later */
2553         if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
2554                 dev_err(&pdev->dev, "Failed to communicate with PF; waiting before retry\n");
2555                 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
2556                 i40evf_shutdown_adminq(hw);
2557                 adapter->state = __I40EVF_STARTUP;
2558                 schedule_delayed_work(&adapter->init_task, HZ * 5);
2559                 return;
2560         }
2561         schedule_delayed_work(&adapter->init_task, HZ);
2562 }
2563
2564 /**
2565  * i40evf_shutdown - Shutdown the device in preparation for a reboot
2566  * @pdev: pci device structure
2567  **/
2568 static void i40evf_shutdown(struct pci_dev *pdev)
2569 {
2570         struct net_device *netdev = pci_get_drvdata(pdev);
2571         struct i40evf_adapter *adapter = netdev_priv(netdev);
2572
2573         netif_device_detach(netdev);
2574
2575         if (netif_running(netdev))
2576                 i40evf_close(netdev);
2577
2578         /* Prevent the watchdog from running. */
2579         adapter->state = __I40EVF_REMOVE;
2580         adapter->aq_required = 0;
2581
2582 #ifdef CONFIG_PM
2583         pci_save_state(pdev);
2584
2585 #endif
2586         pci_disable_device(pdev);
2587 }
2588
2589 /**
2590  * i40evf_probe - Device Initialization Routine
2591  * @pdev: PCI device information struct
2592  * @ent: entry in i40evf_pci_tbl
2593  *
2594  * Returns 0 on success, negative on failure
2595  *
2596  * i40evf_probe initializes an adapter identified by a pci_dev structure.
2597  * The OS initialization, configuring of the adapter private structure,
2598  * and a hardware reset occur.
2599  **/
2600 static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2601 {
2602         struct net_device *netdev;
2603         struct i40evf_adapter *adapter = NULL;
2604         struct i40e_hw *hw = NULL;
2605         int err;
2606
2607         err = pci_enable_device(pdev);
2608         if (err)
2609                 return err;
2610
2611         err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
2612         if (err) {
2613                 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2614                 if (err) {
2615                         dev_err(&pdev->dev,
2616                                 "DMA configuration failed: 0x%x\n", err);
2617                         goto err_dma;
2618                 }
2619         }
2620
2621         err = pci_request_regions(pdev, i40evf_driver_name);
2622         if (err) {
2623                 dev_err(&pdev->dev,
2624                         "pci_request_regions failed 0x%x\n", err);
2625                 goto err_pci_reg;
2626         }
2627
2628         pci_enable_pcie_error_reporting(pdev);
2629
2630         pci_set_master(pdev);
2631
2632         netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter), MAX_QUEUES);
2633         if (!netdev) {
2634                 err = -ENOMEM;
2635                 goto err_alloc_etherdev;
2636         }
2637
2638         SET_NETDEV_DEV(netdev, &pdev->dev);
2639
2640         pci_set_drvdata(pdev, netdev);
2641         adapter = netdev_priv(netdev);
2642
2643         adapter->netdev = netdev;
2644         adapter->pdev = pdev;
2645
2646         hw = &adapter->hw;
2647         hw->back = adapter;
2648
2649         adapter->msg_enable = BIT(DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
2650         adapter->state = __I40EVF_STARTUP;
2651
2652         /* Call save state here because it relies on the adapter struct. */
2653         pci_save_state(pdev);
2654
2655         hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
2656                               pci_resource_len(pdev, 0));
2657         if (!hw->hw_addr) {
2658                 err = -EIO;
2659                 goto err_ioremap;
2660         }
2661         hw->vendor_id = pdev->vendor;
2662         hw->device_id = pdev->device;
2663         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2664         hw->subsystem_vendor_id = pdev->subsystem_vendor;
2665         hw->subsystem_device_id = pdev->subsystem_device;
2666         hw->bus.device = PCI_SLOT(pdev->devfn);
2667         hw->bus.func = PCI_FUNC(pdev->devfn);
2668
2669         INIT_LIST_HEAD(&adapter->mac_filter_list);
2670         INIT_LIST_HEAD(&adapter->vlan_filter_list);
2671
2672         INIT_WORK(&adapter->reset_task, i40evf_reset_task);
2673         INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
2674         INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
2675         INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
2676         schedule_delayed_work(&adapter->init_task,
2677                               msecs_to_jiffies(5 * (pdev->devfn & 0x07)));
2678
2679         return 0;
2680
2681 err_ioremap:
2682         free_netdev(netdev);
2683 err_alloc_etherdev:
2684         pci_release_regions(pdev);
2685 err_pci_reg:
2686 err_dma:
2687         pci_disable_device(pdev);
2688         return err;
2689 }
2690
2691 #ifdef CONFIG_PM
2692 /**
2693  * i40evf_suspend - Power management suspend routine
2694  * @pdev: PCI device information struct
2695  * @state: unused
2696  *
2697  * Called when the system (VM) is entering sleep/suspend.
2698  **/
2699 static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
2700 {
2701         struct net_device *netdev = pci_get_drvdata(pdev);
2702         struct i40evf_adapter *adapter = netdev_priv(netdev);
2703         int retval = 0;
2704
2705         netif_device_detach(netdev);
2706
2707         if (netif_running(netdev)) {
2708                 rtnl_lock();
2709                 i40evf_down(adapter);
2710                 rtnl_unlock();
2711         }
2712         i40evf_free_misc_irq(adapter);
2713         i40evf_reset_interrupt_capability(adapter);
2714
2715         retval = pci_save_state(pdev);
2716         if (retval)
2717                 return retval;
2718
2719         pci_disable_device(pdev);
2720
2721         return 0;
2722 }
2723
2724 /**
2725  * i40evf_resume - Power management resume routine
2726  * @pdev: PCI device information struct
2727  *
2728  * Called when the system (VM) is resumed from sleep/suspend.
2729  **/
2730 static int i40evf_resume(struct pci_dev *pdev)
2731 {
2732         struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
2733         struct net_device *netdev = adapter->netdev;
2734         u32 err;
2735
2736         pci_set_power_state(pdev, PCI_D0);
2737         pci_restore_state(pdev);
2738         /* pci_restore_state clears dev->state_saved so call
2739          * pci_save_state to restore it.
2740          */
2741         pci_save_state(pdev);
2742
2743         err = pci_enable_device_mem(pdev);
2744         if (err) {
2745                 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
2746                 return err;
2747         }
2748         pci_set_master(pdev);
2749
2750         rtnl_lock();
2751         err = i40evf_set_interrupt_capability(adapter);
2752         if (err) {
2753                 rtnl_unlock();
2754                 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
2755                 return err;
2756         }
2757         err = i40evf_request_misc_irq(adapter);
2758         rtnl_unlock();
2759         if (err) {
2760                 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
2761                 return err;
2762         }
2763
2764         schedule_work(&adapter->reset_task);
2765
2766         netif_device_attach(netdev);
2767
2768         return err;
2769 }
2770
2771 #endif /* CONFIG_PM */
2772 /**
2773  * i40evf_remove - Device Removal Routine
2774  * @pdev: PCI device information struct
2775  *
2776  * i40evf_remove is called by the PCI subsystem to alert the driver
2777  * that it should release a PCI device.  The could be caused by a
2778  * Hot-Plug event, or because the driver is going to be removed from
2779  * memory.
2780  **/
2781 static void i40evf_remove(struct pci_dev *pdev)
2782 {
2783         struct net_device *netdev = pci_get_drvdata(pdev);
2784         struct i40evf_adapter *adapter = netdev_priv(netdev);
2785         struct i40evf_mac_filter *f, *ftmp;
2786         struct i40e_hw *hw = &adapter->hw;
2787
2788         cancel_delayed_work_sync(&adapter->init_task);
2789         cancel_work_sync(&adapter->reset_task);
2790
2791         if (adapter->netdev_registered) {
2792                 unregister_netdev(netdev);
2793                 adapter->netdev_registered = false;
2794         }
2795
2796         /* Shut down all the garbage mashers on the detention level */
2797         adapter->state = __I40EVF_REMOVE;
2798         adapter->aq_required = 0;
2799         i40evf_request_reset(adapter);
2800         msleep(20);
2801         /* If the FW isn't responding, kick it once, but only once. */
2802         if (!i40evf_asq_done(hw)) {
2803                 i40evf_request_reset(adapter);
2804                 msleep(20);
2805         }
2806
2807         if (adapter->msix_entries) {
2808                 i40evf_misc_irq_disable(adapter);
2809                 i40evf_free_misc_irq(adapter);
2810                 i40evf_reset_interrupt_capability(adapter);
2811                 i40evf_free_q_vectors(adapter);
2812         }
2813
2814         if (adapter->watchdog_timer.function)
2815                 del_timer_sync(&adapter->watchdog_timer);
2816
2817         flush_scheduled_work();
2818
2819         /* Clear user configurations for RSS */
2820         i40evf_clear_rss_config_user(&adapter->vsi);
2821
2822         if (hw->aq.asq.count)
2823                 i40evf_shutdown_adminq(hw);
2824
2825         iounmap(hw->hw_addr);
2826         pci_release_regions(pdev);
2827
2828         i40evf_free_all_tx_resources(adapter);
2829         i40evf_free_all_rx_resources(adapter);
2830         i40evf_free_queues(adapter);
2831         kfree(adapter->vf_res);
2832         /* If we got removed before an up/down sequence, we've got a filter
2833          * hanging out there that we need to get rid of.
2834          */
2835         list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
2836                 list_del(&f->list);
2837                 kfree(f);
2838         }
2839         list_for_each_entry_safe(f, ftmp, &adapter->vlan_filter_list, list) {
2840                 list_del(&f->list);
2841                 kfree(f);
2842         }
2843
2844         free_netdev(netdev);
2845
2846         pci_disable_pcie_error_reporting(pdev);
2847
2848         pci_disable_device(pdev);
2849 }
2850
2851 static struct pci_driver i40evf_driver = {
2852         .name     = i40evf_driver_name,
2853         .id_table = i40evf_pci_tbl,
2854         .probe    = i40evf_probe,
2855         .remove   = i40evf_remove,
2856 #ifdef CONFIG_PM
2857         .suspend  = i40evf_suspend,
2858         .resume   = i40evf_resume,
2859 #endif
2860         .shutdown = i40evf_shutdown,
2861 };
2862
2863 /**
2864  * i40e_init_module - Driver Registration Routine
2865  *
2866  * i40e_init_module is the first routine called when the driver is
2867  * loaded. All it does is register with the PCI subsystem.
2868  **/
2869 static int __init i40evf_init_module(void)
2870 {
2871         int ret;
2872
2873         pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
2874                 i40evf_driver_version);
2875
2876         pr_info("%s\n", i40evf_copyright);
2877
2878         ret = pci_register_driver(&i40evf_driver);
2879         return ret;
2880 }
2881
2882 module_init(i40evf_init_module);
2883
2884 /**
2885  * i40e_exit_module - Driver Exit Cleanup Routine
2886  *
2887  * i40e_exit_module is called just before the driver is removed
2888  * from memory.
2889  **/
2890 static void __exit i40evf_exit_module(void)
2891 {
2892         pci_unregister_driver(&i40evf_driver);
2893 }
2894
2895 module_exit(i40evf_exit_module);
2896
2897 /* i40evf_main.c */