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

   1 /*******************************************************************************
   2  *
   3  * Intel Ethernet Controller XL710 Family Linux Virtual Function Driver
   4  * Copyright(c) 2013 - 2016 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) 40-10 Gigabit Virtual Function Network Driver";
  36
  37 #define DRV_KERN "-k"
  38
  39 #define DRV_VERSION_MAJOR 1
  40 #define DRV_VERSION_MINOR 6
  41 #define DRV_VERSION_BUILD 11
  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_VF_HV), 0},
  61         {PCI_VDEVICE(INTEL, I40E_DEV_ID_X722_VF), 0},
  62         {PCI_VDEVICE(INTEL, I40E_DEV_ID_X722_VF_HV), 0},
  63         /* required last entry */
  64         {0, }
  65 };
  66
  67 MODULE_DEVICE_TABLE(pci, i40evf_pci_tbl);
  68
  69 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
  70 MODULE_DESCRIPTION("Intel(R) XL710 X710 Virtual Function Network Driver");
  71 MODULE_LICENSE("GPL");
  72 MODULE_VERSION(DRV_VERSION);
  73
  74 static struct workqueue_struct *i40evf_wq;
  75
  76 /**
  77  * i40evf_allocate_dma_mem_d - OS specific memory alloc for shared code
  78  * @hw:   pointer to the HW structure
  79  * @mem:  ptr to mem struct to fill out
  80  * @size: size of memory requested
  81  * @alignment: what to align the allocation to
  82  **/
  83 i40e_status i40evf_allocate_dma_mem_d(struct i40e_hw *hw,
  84                                       struct i40e_dma_mem *mem,
  85                                       u64 size, u32 alignment)
  86 {
  87         struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
  88
  89         if (!mem)
  90                 return I40E_ERR_PARAM;
  91
  92         mem->size = ALIGN(size, alignment);
  93         mem->va = dma_alloc_coherent(&adapter->pdev->dev, mem->size,
  94                                      (dma_addr_t *)&mem->pa, GFP_KERNEL);
  95         if (mem->va)
  96                 return 0;
  97         else
  98                 return I40E_ERR_NO_MEMORY;
  99 }
 100
 101 /**
 102  * i40evf_free_dma_mem_d - OS specific memory free for shared code
 103  * @hw:   pointer to the HW structure
 104  * @mem:  ptr to mem struct to free
 105  **/
 106 i40e_status i40evf_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem)
 107 {
 108         struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
 109
 110         if (!mem || !mem->va)
 111                 return I40E_ERR_PARAM;
 112         dma_free_coherent(&adapter->pdev->dev, mem->size,
 113                           mem->va, (dma_addr_t)mem->pa);
 114         return 0;
 115 }
 116
 117 /**
 118  * i40evf_allocate_virt_mem_d - OS specific memory alloc for shared code
 119  * @hw:   pointer to the HW structure
 120  * @mem:  ptr to mem struct to fill out
 121  * @size: size of memory requested
 122  **/
 123 i40e_status i40evf_allocate_virt_mem_d(struct i40e_hw *hw,
 124                                        struct i40e_virt_mem *mem, u32 size)
 125 {
 126         if (!mem)
 127                 return I40E_ERR_PARAM;
 128
 129         mem->size = size;
 130         mem->va = kzalloc(size, GFP_KERNEL);
 131
 132         if (mem->va)
 133                 return 0;
 134         else
 135                 return I40E_ERR_NO_MEMORY;
 136 }
 137
 138 /**
 139  * i40evf_free_virt_mem_d - OS specific memory free for shared code
 140  * @hw:   pointer to the HW structure
 141  * @mem:  ptr to mem struct to free
 142  **/
 143 i40e_status i40evf_free_virt_mem_d(struct i40e_hw *hw,
 144                                    struct i40e_virt_mem *mem)
 145 {
 146         if (!mem)
 147                 return I40E_ERR_PARAM;
 148
 149         /* it's ok to kfree a NULL pointer */
 150         kfree(mem->va);
 151
 152         return 0;
 153 }
 154
 155 /**
 156  * i40evf_debug_d - OS dependent version of debug printing
 157  * @hw:  pointer to the HW structure
 158  * @mask: debug level mask
 159  * @fmt_str: printf-type format description
 160  **/
 161 void i40evf_debug_d(void *hw, u32 mask, char *fmt_str, ...)
 162 {
 163         char buf[512];
 164         va_list argptr;
 165
 166         if (!(mask & ((struct i40e_hw *)hw)->debug_mask))
 167                 return;
 168
 169         va_start(argptr, fmt_str);
 170         vsnprintf(buf, sizeof(buf), fmt_str, argptr);
 171         va_end(argptr);
 172
 173         /* the debug string is already formatted with a newline */
 174         pr_info("%s", buf);
 175 }
 176
 177 /**
 178  * i40evf_schedule_reset - Set the flags and schedule a reset event
 179  * @adapter: board private structure
 180  **/
 181 void i40evf_schedule_reset(struct i40evf_adapter *adapter)
 182 {
 183         if (!(adapter->flags &
 184               (I40EVF_FLAG_RESET_PENDING | I40EVF_FLAG_RESET_NEEDED))) {
 185                 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
 186                 schedule_work(&adapter->reset_task);
 187         }
 188 }
 189
 190 /**
 191  * i40evf_tx_timeout - Respond to a Tx Hang
 192  * @netdev: network interface device structure
 193  **/
 194 static void i40evf_tx_timeout(struct net_device *netdev)
 195 {
 196         struct i40evf_adapter *adapter = netdev_priv(netdev);
 197
 198         adapter->tx_timeout_count++;
 199         i40evf_schedule_reset(adapter);
 200 }
 201
 202 /**
 203  * i40evf_misc_irq_disable - Mask off interrupt generation on the NIC
 204  * @adapter: board private structure
 205  **/
 206 static void i40evf_misc_irq_disable(struct i40evf_adapter *adapter)
 207 {
 208         struct i40e_hw *hw = &adapter->hw;
 209
 210         wr32(hw, I40E_VFINT_DYN_CTL01, 0);
 211
 212         /* read flush */
 213         rd32(hw, I40E_VFGEN_RSTAT);
 214
 215         synchronize_irq(adapter->msix_entries[0].vector);
 216 }
 217
 218 /**
 219  * i40evf_misc_irq_enable - Enable default interrupt generation settings
 220  * @adapter: board private structure
 221  **/
 222 static void i40evf_misc_irq_enable(struct i40evf_adapter *adapter)
 223 {
 224         struct i40e_hw *hw = &adapter->hw;
 225
 226         wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK |
 227                                        I40E_VFINT_DYN_CTL01_ITR_INDX_MASK);
 228         wr32(hw, I40E_VFINT_ICR0_ENA1, I40E_VFINT_ICR0_ENA1_ADMINQ_MASK);
 229
 230         /* read flush */
 231         rd32(hw, I40E_VFGEN_RSTAT);
 232 }
 233
 234 /**
 235  * i40evf_irq_disable - Mask off interrupt generation on the NIC
 236  * @adapter: board private structure
 237  **/
 238 static void i40evf_irq_disable(struct i40evf_adapter *adapter)
 239 {
 240         int i;
 241         struct i40e_hw *hw = &adapter->hw;
 242
 243         if (!adapter->msix_entries)
 244                 return;
 245
 246         for (i = 1; i < adapter->num_msix_vectors; i++) {
 247                 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), 0);
 248                 synchronize_irq(adapter->msix_entries[i].vector);
 249         }
 250         /* read flush */
 251         rd32(hw, I40E_VFGEN_RSTAT);
 252 }
 253
 254 /**
 255  * i40evf_irq_enable_queues - Enable interrupt for specified queues
 256  * @adapter: board private structure
 257  * @mask: bitmap of queues to enable
 258  **/
 259 void i40evf_irq_enable_queues(struct i40evf_adapter *adapter, u32 mask)
 260 {
 261         struct i40e_hw *hw = &adapter->hw;
 262         int i;
 263
 264         for (i = 1; i < adapter->num_msix_vectors; i++) {
 265                 if (mask & BIT(i - 1)) {
 266                         wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1),
 267                              I40E_VFINT_DYN_CTLN1_INTENA_MASK |
 268                              I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
 269                              I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK);
 270                 }
 271         }
 272 }
 273
 274 /**
 275  * i40evf_fire_sw_int - Generate SW interrupt for specified vectors
 276  * @adapter: board private structure
 277  * @mask: bitmap of vectors to trigger
 278  **/
 279 static void i40evf_fire_sw_int(struct i40evf_adapter *adapter, u32 mask)
 280 {
 281         struct i40e_hw *hw = &adapter->hw;
 282         int i;
 283         u32 dyn_ctl;
 284
 285         if (mask & 1) {
 286                 dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTL01);
 287                 dyn_ctl |= I40E_VFINT_DYN_CTLN1_SWINT_TRIG_MASK |
 288                            I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
 289                            I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK;
 290                 wr32(hw, I40E_VFINT_DYN_CTL01, dyn_ctl);
 291         }
 292         for (i = 1; i < adapter->num_msix_vectors; i++) {
 293                 if (mask & BIT(i)) {
 294                         dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTLN1(i - 1));
 295                         dyn_ctl |= I40E_VFINT_DYN_CTLN1_SWINT_TRIG_MASK |
 296                                    I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
 297                                    I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK;
 298                         wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), dyn_ctl);
 299                 }
 300         }
 301 }
 302
 303 /**
 304  * i40evf_irq_enable - Enable default interrupt generation settings
 305  * @adapter: board private structure
 306  * @flush: boolean value whether to run rd32()
 307  **/
 308 void i40evf_irq_enable(struct i40evf_adapter *adapter, bool flush)
 309 {
 310         struct i40e_hw *hw = &adapter->hw;
 311
 312         i40evf_misc_irq_enable(adapter);
 313         i40evf_irq_enable_queues(adapter, ~0);
 314
 315         if (flush)
 316                 rd32(hw, I40E_VFGEN_RSTAT);
 317 }
 318
 319 /**
 320  * i40evf_msix_aq - Interrupt handler for vector 0
 321  * @irq: interrupt number
 322  * @data: pointer to netdev
 323  **/
 324 static irqreturn_t i40evf_msix_aq(int irq, void *data)
 325 {
 326         struct net_device *netdev = data;
 327         struct i40evf_adapter *adapter = netdev_priv(netdev);
 328         struct i40e_hw *hw = &adapter->hw;
 329         u32 val;
 330
 331         /* handle non-queue interrupts, these reads clear the registers */
 332         val = rd32(hw, I40E_VFINT_ICR01);
 333         val = rd32(hw, I40E_VFINT_ICR0_ENA1);
 334
 335         val = rd32(hw, I40E_VFINT_DYN_CTL01) |
 336               I40E_VFINT_DYN_CTL01_CLEARPBA_MASK;
 337         wr32(hw, I40E_VFINT_DYN_CTL01, val);
 338
 339         /* schedule work on the private workqueue */
 340         schedule_work(&adapter->adminq_task);
 341
 342         return IRQ_HANDLED;
 343 }
 344
 345 /**
 346  * i40evf_msix_clean_rings - MSIX mode Interrupt Handler
 347  * @irq: interrupt number
 348  * @data: pointer to a q_vector
 349  **/
 350 static irqreturn_t i40evf_msix_clean_rings(int irq, void *data)
 351 {
 352         struct i40e_q_vector *q_vector = data;
 353
 354         if (!q_vector->tx.ring && !q_vector->rx.ring)
 355                 return IRQ_HANDLED;
 356
 357         napi_schedule_irqoff(&q_vector->napi);
 358
 359         return IRQ_HANDLED;
 360 }
 361
 362 /**
 363  * i40evf_map_vector_to_rxq - associate irqs with rx queues
 364  * @adapter: board private structure
 365  * @v_idx: interrupt number
 366  * @r_idx: queue number
 367  **/
 368 static void
 369 i40evf_map_vector_to_rxq(struct i40evf_adapter *adapter, int v_idx, int r_idx)
 370 {
 371         struct i40e_q_vector *q_vector = &adapter->q_vectors[v_idx];
 372         struct i40e_ring *rx_ring = &adapter->rx_rings[r_idx];
 373
 374         rx_ring->q_vector = q_vector;
 375         rx_ring->next = q_vector->rx.ring;
 376         rx_ring->vsi = &adapter->vsi;
 377         q_vector->rx.ring = rx_ring;
 378         q_vector->rx.count++;
 379         q_vector->rx.latency_range = I40E_LOW_LATENCY;
 380         q_vector->itr_countdown = ITR_COUNTDOWN_START;
 381 }
 382
 383 /**
 384  * i40evf_map_vector_to_txq - associate irqs with tx queues
 385  * @adapter: board private structure
 386  * @v_idx: interrupt number
 387  * @t_idx: queue number
 388  **/
 389 static void
 390 i40evf_map_vector_to_txq(struct i40evf_adapter *adapter, int v_idx, int t_idx)
 391 {
 392         struct i40e_q_vector *q_vector = &adapter->q_vectors[v_idx];
 393         struct i40e_ring *tx_ring = &adapter->tx_rings[t_idx];
 394
 395         tx_ring->q_vector = q_vector;
 396         tx_ring->next = q_vector->tx.ring;
 397         tx_ring->vsi = &adapter->vsi;
 398         q_vector->tx.ring = tx_ring;
 399         q_vector->tx.count++;
 400         q_vector->tx.latency_range = I40E_LOW_LATENCY;
 401         q_vector->itr_countdown = ITR_COUNTDOWN_START;
 402         q_vector->num_ringpairs++;
 403         q_vector->ring_mask |= BIT(t_idx);
 404 }
 405
 406 /**
 407  * i40evf_map_rings_to_vectors - Maps descriptor rings to vectors
 408  * @adapter: board private structure to initialize
 409  *
 410  * This function maps descriptor rings to the queue-specific vectors
 411  * we were allotted through the MSI-X enabling code.  Ideally, we'd have
 412  * one vector per ring/queue, but on a constrained vector budget, we
 413  * group the rings as "efficiently" as possible.  You would add new
 414  * mapping configurations in here.
 415  **/
 416 static int i40evf_map_rings_to_vectors(struct i40evf_adapter *adapter)
 417 {
 418         int q_vectors;
 419         int v_start = 0;
 420         int rxr_idx = 0, txr_idx = 0;
 421         int rxr_remaining = adapter->num_active_queues;
 422         int txr_remaining = adapter->num_active_queues;
 423         int i, j;
 424         int rqpv, tqpv;
 425         int err = 0;
 426
 427         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 428
 429         /* The ideal configuration...
 430          * We have enough vectors to map one per queue.
 431          */
 432         if (q_vectors >= (rxr_remaining * 2)) {
 433                 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
 434                         i40evf_map_vector_to_rxq(adapter, v_start, rxr_idx);
 435
 436                 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
 437                         i40evf_map_vector_to_txq(adapter, v_start, txr_idx);
 438                 goto out;
 439         }
 440
 441         /* If we don't have enough vectors for a 1-to-1
 442          * mapping, we'll have to group them so there are
 443          * multiple queues per vector.
 444          * Re-adjusting *qpv takes care of the remainder.
 445          */
 446         for (i = v_start; i < q_vectors; i++) {
 447                 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
 448                 for (j = 0; j < rqpv; j++) {
 449                         i40evf_map_vector_to_rxq(adapter, i, rxr_idx);
 450                         rxr_idx++;
 451                         rxr_remaining--;
 452                 }
 453         }
 454         for (i = v_start; i < q_vectors; i++) {
 455                 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
 456                 for (j = 0; j < tqpv; j++) {
 457                         i40evf_map_vector_to_txq(adapter, i, txr_idx);
 458                         txr_idx++;
 459                         txr_remaining--;
 460                 }
 461         }
 462
 463 out:
 464         adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
 465
 466         return err;
 467 }
 468
 469 #ifdef CONFIG_NET_POLL_CONTROLLER
 470 /**
 471  * i40evf_netpoll - A Polling 'interrupt' handler
 472  * @netdev: network interface device structure
 473  *
 474  * This is used by netconsole to send skbs without having to re-enable
 475  * interrupts.  It's not called while the normal interrupt routine is executing.
 476  **/
 477 static void i40evf_netpoll(struct net_device *netdev)
 478 {
 479         struct i40evf_adapter *adapter = netdev_priv(netdev);
 480         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 481         int i;
 482
 483         /* if interface is down do nothing */
 484         if (test_bit(__I40E_DOWN, &adapter->vsi.state))
 485                 return;
 486
 487         for (i = 0; i < q_vectors; i++)
 488                 i40evf_msix_clean_rings(0, &adapter->q_vectors[i]);
 489 }
 490
 491 #endif
 492 /**
 493  * i40evf_request_traffic_irqs - Initialize MSI-X interrupts
 494  * @adapter: board private structure
 495  *
 496  * Allocates MSI-X vectors for tx and rx handling, and requests
 497  * interrupts from the kernel.
 498  **/
 499 static int
 500 i40evf_request_traffic_irqs(struct i40evf_adapter *adapter, char *basename)
 501 {
 502         int vector, err, q_vectors;
 503         int rx_int_idx = 0, tx_int_idx = 0;
 504
 505         i40evf_irq_disable(adapter);
 506         /* Decrement for Other and TCP Timer vectors */
 507         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 508
 509         for (vector = 0; vector < q_vectors; vector++) {
 510                 struct i40e_q_vector *q_vector = &adapter->q_vectors[vector];
 511
 512                 if (q_vector->tx.ring && q_vector->rx.ring) {
 513                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 514                                  "i40evf-%s-%s-%d", basename,
 515                                  "TxRx", rx_int_idx++);
 516                         tx_int_idx++;
 517                 } else if (q_vector->rx.ring) {
 518                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 519                                  "i40evf-%s-%s-%d", basename,
 520                                  "rx", rx_int_idx++);
 521                 } else if (q_vector->tx.ring) {
 522                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 523                                  "i40evf-%s-%s-%d", basename,
 524                                  "tx", tx_int_idx++);
 525                 } else {
 526                         /* skip this unused q_vector */
 527                         continue;
 528                 }
 529                 err = request_irq(
 530                         adapter->msix_entries[vector + NONQ_VECS].vector,
 531                         i40evf_msix_clean_rings,
 532                         0,
 533                         q_vector->name,
 534                         q_vector);
 535                 if (err) {
 536                         dev_info(&adapter->pdev->dev,
 537                                  "Request_irq failed, error: %d\n", err);
 538                         goto free_queue_irqs;
 539                 }
 540                 /* assign the mask for this irq */
 541                 irq_set_affinity_hint(
 542                         adapter->msix_entries[vector + NONQ_VECS].vector,
 543                         q_vector->affinity_mask);
 544         }
 545
 546         return 0;
 547
 548 free_queue_irqs:
 549         while (vector) {
 550                 vector--;
 551                 irq_set_affinity_hint(
 552                         adapter->msix_entries[vector + NONQ_VECS].vector,
 553                         NULL);
 554                 free_irq(adapter->msix_entries[vector + NONQ_VECS].vector,
 555                          &adapter->q_vectors[vector]);
 556         }
 557         return err;
 558 }
 559
 560 /**
 561  * i40evf_request_misc_irq - Initialize MSI-X interrupts
 562  * @adapter: board private structure
 563  *
 564  * Allocates MSI-X vector 0 and requests interrupts from the kernel. This
 565  * vector is only for the admin queue, and stays active even when the netdev
 566  * is closed.
 567  **/
 568 static int i40evf_request_misc_irq(struct i40evf_adapter *adapter)
 569 {
 570         struct net_device *netdev = adapter->netdev;
 571         int err;
 572
 573         snprintf(adapter->misc_vector_name,
 574                  sizeof(adapter->misc_vector_name) - 1, "i40evf-%s:mbx",
 575                  dev_name(&adapter->pdev->dev));
 576         err = request_irq(adapter->msix_entries[0].vector,
 577                           &i40evf_msix_aq, 0,
 578                           adapter->misc_vector_name, netdev);
 579         if (err) {
 580                 dev_err(&adapter->pdev->dev,
 581                         "request_irq for %s failed: %d\n",
 582                         adapter->misc_vector_name, err);
 583                 free_irq(adapter->msix_entries[0].vector, netdev);
 584         }
 585         return err;
 586 }
 587
 588 /**
 589  * i40evf_free_traffic_irqs - Free MSI-X interrupts
 590  * @adapter: board private structure
 591  *
 592  * Frees all MSI-X vectors other than 0.
 593  **/
 594 static void i40evf_free_traffic_irqs(struct i40evf_adapter *adapter)
 595 {
 596         int i;
 597         int q_vectors;
 598
 599         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 600
 601         for (i = 0; i < q_vectors; i++) {
 602                 irq_set_affinity_hint(adapter->msix_entries[i+1].vector,
 603                                       NULL);
 604                 free_irq(adapter->msix_entries[i+1].vector,
 605                          &adapter->q_vectors[i]);
 606         }
 607 }
 608
 609 /**
 610  * i40evf_free_misc_irq - Free MSI-X miscellaneous vector
 611  * @adapter: board private structure
 612  *
 613  * Frees MSI-X vector 0.
 614  **/
 615 static void i40evf_free_misc_irq(struct i40evf_adapter *adapter)
 616 {
 617         struct net_device *netdev = adapter->netdev;
 618
 619         free_irq(adapter->msix_entries[0].vector, netdev);
 620 }
 621
 622 /**
 623  * i40evf_configure_tx - Configure Transmit Unit after Reset
 624  * @adapter: board private structure
 625  *
 626  * Configure the Tx unit of the MAC after a reset.
 627  **/
 628 static void i40evf_configure_tx(struct i40evf_adapter *adapter)
 629 {
 630         struct i40e_hw *hw = &adapter->hw;
 631         int i;
 632
 633         for (i = 0; i < adapter->num_active_queues; i++)
 634                 adapter->tx_rings[i].tail = hw->hw_addr + I40E_QTX_TAIL1(i);
 635 }
 636
 637 /**
 638  * i40evf_configure_rx - Configure Receive Unit after Reset
 639  * @adapter: board private structure
 640  *
 641  * Configure the Rx unit of the MAC after a reset.
 642  **/
 643 static void i40evf_configure_rx(struct i40evf_adapter *adapter)
 644 {
 645         struct i40e_hw *hw = &adapter->hw;
 646         int i;
 647
 648         for (i = 0; i < adapter->num_active_queues; i++) {
 649                 adapter->rx_rings[i].tail = hw->hw_addr + I40E_QRX_TAIL1(i);
 650                 adapter->rx_rings[i].rx_buf_len = I40EVF_RXBUFFER_2048;
 651         }
 652 }
 653
 654 /**
 655  * i40evf_find_vlan - Search filter list for specific vlan filter
 656  * @adapter: board private structure
 657  * @vlan: vlan tag
 658  *
 659  * Returns ptr to the filter object or NULL
 660  **/
 661 static struct
 662 i40evf_vlan_filter *i40evf_find_vlan(struct i40evf_adapter *adapter, u16 vlan)
 663 {
 664         struct i40evf_vlan_filter *f;
 665
 666         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
 667                 if (vlan == f->vlan)
 668                         return f;
 669         }
 670         return NULL;
 671 }
 672
 673 /**
 674  * i40evf_add_vlan - Add a vlan filter to the list
 675  * @adapter: board private structure
 676  * @vlan: VLAN tag
 677  *
 678  * Returns ptr to the filter object or NULL when no memory available.
 679  **/
 680 static struct
 681 i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan)
 682 {
 683         struct i40evf_vlan_filter *f = NULL;
 684         int count = 50;
 685
 686         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 687                                 &adapter->crit_section)) {
 688                 udelay(1);
 689                 if (--count == 0)
 690                         goto out;
 691         }
 692
 693         f = i40evf_find_vlan(adapter, vlan);
 694         if (!f) {
 695                 f = kzalloc(sizeof(*f), GFP_ATOMIC);
 696                 if (!f)
 697                         goto clearout;
 698
 699                 f->vlan = vlan;
 700
 701                 INIT_LIST_HEAD(&f->list);
 702                 list_add(&f->list, &adapter->vlan_filter_list);
 703                 f->add = true;
 704                 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
 705         }
 706
 707 clearout:
 708         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 709 out:
 710         return f;
 711 }
 712
 713 /**
 714  * i40evf_del_vlan - Remove a vlan filter from the list
 715  * @adapter: board private structure
 716  * @vlan: VLAN tag
 717  **/
 718 static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan)
 719 {
 720         struct i40evf_vlan_filter *f;
 721         int count = 50;
 722
 723         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 724                                 &adapter->crit_section)) {
 725                 udelay(1);
 726                 if (--count == 0)
 727                         return;
 728         }
 729
 730         f = i40evf_find_vlan(adapter, vlan);
 731         if (f) {
 732                 f->remove = true;
 733                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
 734         }
 735         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 736 }
 737
 738 /**
 739  * i40evf_vlan_rx_add_vid - Add a VLAN filter to a device
 740  * @netdev: network device struct
 741  * @vid: VLAN tag
 742  **/
 743 static int i40evf_vlan_rx_add_vid(struct net_device *netdev,
 744                                   __always_unused __be16 proto, u16 vid)
 745 {
 746         struct i40evf_adapter *adapter = netdev_priv(netdev);
 747
 748         if (!VLAN_ALLOWED(adapter))
 749                 return -EIO;
 750         if (i40evf_add_vlan(adapter, vid) == NULL)
 751                 return -ENOMEM;
 752         return 0;
 753 }
 754
 755 /**
 756  * i40evf_vlan_rx_kill_vid - Remove a VLAN filter from a device
 757  * @netdev: network device struct
 758  * @vid: VLAN tag
 759  **/
 760 static int i40evf_vlan_rx_kill_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                 i40evf_del_vlan(adapter, vid);
 767                 return 0;
 768         }
 769         return -EIO;
 770 }
 771
 772 /**
 773  * i40evf_find_filter - Search filter list for specific mac filter
 774  * @adapter: board private structure
 775  * @macaddr: the MAC address
 776  *
 777  * Returns ptr to the filter object or NULL
 778  **/
 779 static struct
 780 i40evf_mac_filter *i40evf_find_filter(struct i40evf_adapter *adapter,
 781                                       u8 *macaddr)
 782 {
 783         struct i40evf_mac_filter *f;
 784
 785         if (!macaddr)
 786                 return NULL;
 787
 788         list_for_each_entry(f, &adapter->mac_filter_list, list) {
 789                 if (ether_addr_equal(macaddr, f->macaddr))
 790                         return f;
 791         }
 792         return NULL;
 793 }
 794
 795 /**
 796  * i40e_add_filter - Add a mac filter to the filter list
 797  * @adapter: board private structure
 798  * @macaddr: the MAC address
 799  *
 800  * Returns ptr to the filter object or NULL when no memory available.
 801  **/
 802 static struct
 803 i40evf_mac_filter *i40evf_add_filter(struct i40evf_adapter *adapter,
 804                                      u8 *macaddr)
 805 {
 806         struct i40evf_mac_filter *f;
 807         int count = 50;
 808
 809         if (!macaddr)
 810                 return NULL;
 811
 812         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 813                                 &adapter->crit_section)) {
 814                 udelay(1);
 815                 if (--count == 0)
 816                         return NULL;
 817         }
 818
 819         f = i40evf_find_filter(adapter, macaddr);
 820         if (!f) {
 821                 f = kzalloc(sizeof(*f), GFP_ATOMIC);
 822                 if (!f) {
 823                         clear_bit(__I40EVF_IN_CRITICAL_TASK,
 824                                   &adapter->crit_section);
 825                         return NULL;
 826                 }
 827
 828                 ether_addr_copy(f->macaddr, macaddr);
 829
 830                 list_add_tail(&f->list, &adapter->mac_filter_list);
 831                 f->add = true;
 832                 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
 833         }
 834
 835         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 836         return f;
 837 }
 838
 839 /**
 840  * i40evf_set_mac - NDO callback to set port mac address
 841  * @netdev: network interface device structure
 842  * @p: pointer to an address structure
 843  *
 844  * Returns 0 on success, negative on failure
 845  **/
 846 static int i40evf_set_mac(struct net_device *netdev, void *p)
 847 {
 848         struct i40evf_adapter *adapter = netdev_priv(netdev);
 849         struct i40e_hw *hw = &adapter->hw;
 850         struct i40evf_mac_filter *f;
 851         struct sockaddr *addr = p;
 852
 853         if (!is_valid_ether_addr(addr->sa_data))
 854                 return -EADDRNOTAVAIL;
 855
 856         if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
 857                 return 0;
 858
 859         if (adapter->flags & I40EVF_FLAG_ADDR_SET_BY_PF)
 860                 return -EPERM;
 861
 862         f = i40evf_find_filter(adapter, hw->mac.addr);
 863         if (f) {
 864                 f->remove = true;
 865                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
 866         }
 867
 868         f = i40evf_add_filter(adapter, addr->sa_data);
 869         if (f) {
 870                 ether_addr_copy(hw->mac.addr, addr->sa_data);
 871                 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
 872         }
 873
 874         return (f == NULL) ? -ENOMEM : 0;
 875 }
 876
 877 /**
 878  * i40evf_set_rx_mode - NDO callback to set the netdev filters
 879  * @netdev: network interface device structure
 880  **/
 881 static void i40evf_set_rx_mode(struct net_device *netdev)
 882 {
 883         struct i40evf_adapter *adapter = netdev_priv(netdev);
 884         struct i40evf_mac_filter *f, *ftmp;
 885         struct netdev_hw_addr *uca;
 886         struct netdev_hw_addr *mca;
 887         struct netdev_hw_addr *ha;
 888         int count = 50;
 889
 890         /* add addr if not already in the filter list */
 891         netdev_for_each_uc_addr(uca, netdev) {
 892                 i40evf_add_filter(adapter, uca->addr);
 893         }
 894         netdev_for_each_mc_addr(mca, netdev) {
 895                 i40evf_add_filter(adapter, mca->addr);
 896         }
 897
 898         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 899                                 &adapter->crit_section)) {
 900                 udelay(1);
 901                 if (--count == 0) {
 902                         dev_err(&adapter->pdev->dev,
 903                                 "Failed to get lock in %s\n", __func__);
 904                         return;
 905                 }
 906         }
 907         /* remove filter if not in netdev list */
 908         list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
 909                 netdev_for_each_mc_addr(mca, netdev)
 910                         if (ether_addr_equal(mca->addr, f->macaddr))
 911                                 goto bottom_of_search_loop;
 912
 913                 netdev_for_each_uc_addr(uca, netdev)
 914                         if (ether_addr_equal(uca->addr, f->macaddr))
 915                                 goto bottom_of_search_loop;
 916
 917                 for_each_dev_addr(netdev, ha)
 918                         if (ether_addr_equal(ha->addr, f->macaddr))
 919                                 goto bottom_of_search_loop;
 920
 921                 if (ether_addr_equal(f->macaddr, adapter->hw.mac.addr))
 922                         goto bottom_of_search_loop;
 923
 924                 /* f->macaddr wasn't found in uc, mc, or ha list so delete it */
 925                 f->remove = true;
 926                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
 927
 928 bottom_of_search_loop:
 929                 continue;
 930         }
 931
 932         if (netdev->flags & IFF_PROMISC &&
 933             !(adapter->flags & I40EVF_FLAG_PROMISC_ON))
 934                 adapter->aq_required |= I40EVF_FLAG_AQ_REQUEST_PROMISC;
 935         else if (!(netdev->flags & IFF_PROMISC) &&
 936                  adapter->flags & I40EVF_FLAG_PROMISC_ON)
 937                 adapter->aq_required |= I40EVF_FLAG_AQ_RELEASE_PROMISC;
 938
 939         if (netdev->flags & IFF_ALLMULTI &&
 940             !(adapter->flags & I40EVF_FLAG_ALLMULTI_ON))
 941                 adapter->aq_required |= I40EVF_FLAG_AQ_REQUEST_ALLMULTI;
 942         else if (!(netdev->flags & IFF_ALLMULTI) &&
 943                  adapter->flags & I40EVF_FLAG_ALLMULTI_ON)
 944                 adapter->aq_required |= I40EVF_FLAG_AQ_RELEASE_ALLMULTI;
 945
 946         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 947 }
 948
 949 /**
 950  * i40evf_napi_enable_all - enable NAPI on all queue vectors
 951  * @adapter: board private structure
 952  **/
 953 static void i40evf_napi_enable_all(struct i40evf_adapter *adapter)
 954 {
 955         int q_idx;
 956         struct i40e_q_vector *q_vector;
 957         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 958
 959         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
 960                 struct napi_struct *napi;
 961
 962                 q_vector = &adapter->q_vectors[q_idx];
 963                 napi = &q_vector->napi;
 964                 napi_enable(napi);
 965         }
 966 }
 967
 968 /**
 969  * i40evf_napi_disable_all - disable NAPI on all queue vectors
 970  * @adapter: board private structure
 971  **/
 972 static void i40evf_napi_disable_all(struct i40evf_adapter *adapter)
 973 {
 974         int q_idx;
 975         struct i40e_q_vector *q_vector;
 976         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 977
 978         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
 979                 q_vector = &adapter->q_vectors[q_idx];
 980                 napi_disable(&q_vector->napi);
 981         }
 982 }
 983
 984 /**
 985  * i40evf_configure - set up transmit and receive data structures
 986  * @adapter: board private structure
 987  **/
 988 static void i40evf_configure(struct i40evf_adapter *adapter)
 989 {
 990         struct net_device *netdev = adapter->netdev;
 991         int i;
 992
 993         i40evf_set_rx_mode(netdev);
 994
 995         i40evf_configure_tx(adapter);
 996         i40evf_configure_rx(adapter);
 997         adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
 998
 999         for (i = 0; i < adapter->num_active_queues; i++) {
1000                 struct i40e_ring *ring = &adapter->rx_rings[i];
1001
1002                 i40evf_alloc_rx_buffers(ring, I40E_DESC_UNUSED(ring));
1003         }
1004 }
1005
1006 /**
1007  * i40evf_up_complete - Finish the last steps of bringing up a connection
1008  * @adapter: board private structure
1009  **/
1010 static int i40evf_up_complete(struct i40evf_adapter *adapter)
1011 {
1012         adapter->state = __I40EVF_RUNNING;
1013         clear_bit(__I40E_DOWN, &adapter->vsi.state);
1014
1015         i40evf_napi_enable_all(adapter);
1016
1017         adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES;
1018         mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
1019         return 0;
1020 }
1021
1022 /**
1023  * i40e_down - Shutdown the connection processing
1024  * @adapter: board private structure
1025  **/
1026 void i40evf_down(struct i40evf_adapter *adapter)
1027 {
1028         struct net_device *netdev = adapter->netdev;
1029         struct i40evf_mac_filter *f;
1030
1031         if (adapter->state <= __I40EVF_DOWN_PENDING)
1032                 return;
1033
1034         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1035                                 &adapter->crit_section))
1036                 usleep_range(500, 1000);
1037
1038         netif_carrier_off(netdev);
1039         netif_tx_disable(netdev);
1040         i40evf_napi_disable_all(adapter);
1041         i40evf_irq_disable(adapter);
1042
1043         /* remove all MAC filters */
1044         list_for_each_entry(f, &adapter->mac_filter_list, list) {
1045                 f->remove = true;
1046         }
1047         /* remove all VLAN filters */
1048         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
1049                 f->remove = true;
1050         }
1051         if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) &&
1052             adapter->state != __I40EVF_RESETTING) {
1053                 /* cancel any current operation */
1054                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1055                 /* Schedule operations to close down the HW. Don't wait
1056                  * here for this to complete. The watchdog is still running
1057                  * and it will take care of this.
1058                  */
1059                 adapter->aq_required = I40EVF_FLAG_AQ_DEL_MAC_FILTER;
1060                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
1061                 adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
1062         }
1063
1064         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1065 }
1066
1067 /**
1068  * i40evf_acquire_msix_vectors - Setup the MSIX capability
1069  * @adapter: board private structure
1070  * @vectors: number of vectors to request
1071  *
1072  * Work with the OS to set up the MSIX vectors needed.
1073  *
1074  * Returns 0 on success, negative on failure
1075  **/
1076 static int
1077 i40evf_acquire_msix_vectors(struct i40evf_adapter *adapter, int vectors)
1078 {
1079         int err, vector_threshold;
1080
1081         /* We'll want at least 3 (vector_threshold):
1082          * 0) Other (Admin Queue and link, mostly)
1083          * 1) TxQ[0] Cleanup
1084          * 2) RxQ[0] Cleanup
1085          */
1086         vector_threshold = MIN_MSIX_COUNT;
1087
1088         /* The more we get, the more we will assign to Tx/Rx Cleanup
1089          * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1090          * Right now, we simply care about how many we'll get; we'll
1091          * set them up later while requesting irq's.
1092          */
1093         err = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
1094                                     vector_threshold, vectors);
1095         if (err < 0) {
1096                 dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts\n");
1097                 kfree(adapter->msix_entries);
1098                 adapter->msix_entries = NULL;
1099                 return err;
1100         }
1101
1102         /* Adjust for only the vectors we'll use, which is minimum
1103          * of max_msix_q_vectors + NONQ_VECS, or the number of
1104          * vectors we were allocated.
1105          */
1106         adapter->num_msix_vectors = err;
1107         return 0;
1108 }
1109
1110 /**
1111  * i40evf_free_queues - Free memory for all rings
1112  * @adapter: board private structure to initialize
1113  *
1114  * Free all of the memory associated with queue pairs.
1115  **/
1116 static void i40evf_free_queues(struct i40evf_adapter *adapter)
1117 {
1118         if (!adapter->vsi_res)
1119                 return;
1120         kfree(adapter->tx_rings);
1121         adapter->tx_rings = NULL;
1122         kfree(adapter->rx_rings);
1123         adapter->rx_rings = NULL;
1124 }
1125
1126 /**
1127  * i40evf_alloc_queues - Allocate memory for all rings
1128  * @adapter: board private structure to initialize
1129  *
1130  * We allocate one ring per queue at run-time since we don't know the
1131  * number of queues at compile-time.  The polling_netdev array is
1132  * intended for Multiqueue, but should work fine with a single queue.
1133  **/
1134 static int i40evf_alloc_queues(struct i40evf_adapter *adapter)
1135 {
1136         int i;
1137
1138         adapter->tx_rings = kcalloc(adapter->num_active_queues,
1139                                     sizeof(struct i40e_ring), GFP_KERNEL);
1140         if (!adapter->tx_rings)
1141                 goto err_out;
1142         adapter->rx_rings = kcalloc(adapter->num_active_queues,
1143                                     sizeof(struct i40e_ring), GFP_KERNEL);
1144         if (!adapter->rx_rings)
1145                 goto err_out;
1146
1147         for (i = 0; i < adapter->num_active_queues; i++) {
1148                 struct i40e_ring *tx_ring;
1149                 struct i40e_ring *rx_ring;
1150
1151                 tx_ring = &adapter->tx_rings[i];
1152
1153                 tx_ring->queue_index = i;
1154                 tx_ring->netdev = adapter->netdev;
1155                 tx_ring->dev = &adapter->pdev->dev;
1156                 tx_ring->count = adapter->tx_desc_count;
1157                 if (adapter->flags & I40E_FLAG_WB_ON_ITR_CAPABLE)
1158                         tx_ring->flags |= I40E_TXR_FLAGS_WB_ON_ITR;
1159
1160                 rx_ring = &adapter->rx_rings[i];
1161                 rx_ring->queue_index = i;
1162                 rx_ring->netdev = adapter->netdev;
1163                 rx_ring->dev = &adapter->pdev->dev;
1164                 rx_ring->count = adapter->rx_desc_count;
1165         }
1166
1167         return 0;
1168
1169 err_out:
1170         i40evf_free_queues(adapter);
1171         return -ENOMEM;
1172 }
1173
1174 /**
1175  * i40evf_set_interrupt_capability - set MSI-X or FAIL if not supported
1176  * @adapter: board private structure to initialize
1177  *
1178  * Attempt to configure the interrupts using the best available
1179  * capabilities of the hardware and the kernel.
1180  **/
1181 static int i40evf_set_interrupt_capability(struct i40evf_adapter *adapter)
1182 {
1183         int vector, v_budget;
1184         int pairs = 0;
1185         int err = 0;
1186
1187         if (!adapter->vsi_res) {
1188                 err = -EIO;
1189                 goto out;
1190         }
1191         pairs = adapter->num_active_queues;
1192
1193         /* It's easy to be greedy for MSI-X vectors, but it really
1194          * doesn't do us much good if we have a lot more vectors
1195          * than CPU's.  So let's be conservative and only ask for
1196          * (roughly) twice the number of vectors as there are CPU's.
1197          */
1198         v_budget = min_t(int, pairs, (int)(num_online_cpus() * 2)) + NONQ_VECS;
1199         v_budget = min_t(int, v_budget, (int)adapter->vf_res->max_vectors);
1200
1201         adapter->msix_entries = kcalloc(v_budget,
1202                                         sizeof(struct msix_entry), GFP_KERNEL);
1203         if (!adapter->msix_entries) {
1204                 err = -ENOMEM;
1205                 goto out;
1206         }
1207
1208         for (vector = 0; vector < v_budget; vector++)
1209                 adapter->msix_entries[vector].entry = vector;
1210
1211         err = i40evf_acquire_msix_vectors(adapter, v_budget);
1212
1213 out:
1214         netif_set_real_num_rx_queues(adapter->netdev, pairs);
1215         netif_set_real_num_tx_queues(adapter->netdev, pairs);
1216         return err;
1217 }
1218
1219 /**
1220  * i40e_config_rss_aq - Configure RSS keys and lut by using AQ commands
1221  * @adapter: board private structure
1222  *
1223  * Return 0 on success, negative on failure
1224  **/
1225 static int i40evf_config_rss_aq(struct i40evf_adapter *adapter)
1226 {
1227         struct i40e_aqc_get_set_rss_key_data *rss_key =
1228                 (struct i40e_aqc_get_set_rss_key_data *)adapter->rss_key;
1229         struct i40e_hw *hw = &adapter->hw;
1230         int ret = 0;
1231
1232         if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
1233                 /* bail because we already have a command pending */
1234                 dev_err(&adapter->pdev->dev, "Cannot configure RSS, command %d pending\n",
1235                         adapter->current_op);
1236                 return -EBUSY;
1237         }
1238
1239         ret = i40evf_aq_set_rss_key(hw, adapter->vsi.id, rss_key);
1240         if (ret) {
1241                 dev_err(&adapter->pdev->dev, "Cannot set RSS key, err %s aq_err %s\n",
1242                         i40evf_stat_str(hw, ret),
1243                         i40evf_aq_str(hw, hw->aq.asq_last_status));
1244                 return ret;
1245
1246         }
1247
1248         ret = i40evf_aq_set_rss_lut(hw, adapter->vsi.id, false,
1249                                     adapter->rss_lut, adapter->rss_lut_size);
1250         if (ret) {
1251                 dev_err(&adapter->pdev->dev, "Cannot set RSS lut, err %s aq_err %s\n",
1252                         i40evf_stat_str(hw, ret),
1253                         i40evf_aq_str(hw, hw->aq.asq_last_status));
1254         }
1255
1256         return ret;
1257
1258 }
1259
1260 /**
1261  * i40evf_config_rss_reg - Configure RSS keys and lut by writing registers
1262  * @adapter: board private structure
1263  *
1264  * Returns 0 on success, negative on failure
1265  **/
1266 static int i40evf_config_rss_reg(struct i40evf_adapter *adapter)
1267 {
1268         struct i40e_hw *hw = &adapter->hw;
1269         u32 *dw;
1270         u16 i;
1271
1272         dw = (u32 *)adapter->rss_key;
1273         for (i = 0; i <= adapter->rss_key_size / 4; i++)
1274                 wr32(hw, I40E_VFQF_HKEY(i), dw[i]);
1275
1276         dw = (u32 *)adapter->rss_lut;
1277         for (i = 0; i <= adapter->rss_lut_size / 4; i++)
1278                 wr32(hw, I40E_VFQF_HLUT(i), dw[i]);
1279
1280         i40e_flush(hw);
1281
1282         return 0;
1283 }
1284
1285 /**
1286  * i40evf_config_rss - Configure RSS keys and lut
1287  * @adapter: board private structure
1288  *
1289  * Returns 0 on success, negative on failure
1290  **/
1291 int i40evf_config_rss(struct i40evf_adapter *adapter)
1292 {
1293
1294         if (RSS_PF(adapter)) {
1295                 adapter->aq_required |= I40EVF_FLAG_AQ_SET_RSS_LUT |
1296                                         I40EVF_FLAG_AQ_SET_RSS_KEY;
1297                 return 0;
1298         } else if (RSS_AQ(adapter)) {
1299                 return i40evf_config_rss_aq(adapter);
1300         } else {
1301                 return i40evf_config_rss_reg(adapter);
1302         }
1303 }
1304
1305 /**
1306  * i40evf_fill_rss_lut - Fill the lut with default values
1307  * @adapter: board private structure
1308  **/
1309 static void i40evf_fill_rss_lut(struct i40evf_adapter *adapter)
1310 {
1311         u16 i;
1312
1313         for (i = 0; i < adapter->rss_lut_size; i++)
1314                 adapter->rss_lut[i] = i % adapter->num_active_queues;
1315 }
1316
1317 /**
1318  * i40evf_init_rss - Prepare for RSS
1319  * @adapter: board private structure
1320  *
1321  * Return 0 on success, negative on failure
1322  **/
1323 static int i40evf_init_rss(struct i40evf_adapter *adapter)
1324 {
1325         struct i40e_hw *hw = &adapter->hw;
1326         int ret;
1327
1328         if (!RSS_PF(adapter)) {
1329                 /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
1330                 if (adapter->vf_res->vf_offload_flags &
1331                     I40E_VIRTCHNL_VF_OFFLOAD_RSS_PCTYPE_V2)
1332                         adapter->hena = I40E_DEFAULT_RSS_HENA_EXPANDED;
1333                 else
1334                         adapter->hena = I40E_DEFAULT_RSS_HENA;
1335
1336                 wr32(hw, I40E_VFQF_HENA(0), (u32)adapter->hena);
1337                 wr32(hw, I40E_VFQF_HENA(1), (u32)(adapter->hena >> 32));
1338         }
1339
1340         i40evf_fill_rss_lut(adapter);
1341
1342         netdev_rss_key_fill((void *)adapter->rss_key, adapter->rss_key_size);
1343         ret = i40evf_config_rss(adapter);
1344
1345         return ret;
1346 }
1347
1348 /**
1349  * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors
1350  * @adapter: board private structure to initialize
1351  *
1352  * We allocate one q_vector per queue interrupt.  If allocation fails we
1353  * return -ENOMEM.
1354  **/
1355 static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
1356 {
1357         int q_idx = 0, num_q_vectors;
1358         struct i40e_q_vector *q_vector;
1359
1360         num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1361         adapter->q_vectors = kcalloc(num_q_vectors, sizeof(*q_vector),
1362                                      GFP_KERNEL);
1363         if (!adapter->q_vectors)
1364                 return -ENOMEM;
1365
1366         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1367                 q_vector = &adapter->q_vectors[q_idx];
1368                 q_vector->adapter = adapter;
1369                 q_vector->vsi = &adapter->vsi;
1370                 q_vector->v_idx = q_idx;
1371                 netif_napi_add(adapter->netdev, &q_vector->napi,
1372                                i40evf_napi_poll, NAPI_POLL_WEIGHT);
1373         }
1374
1375         return 0;
1376 }
1377
1378 /**
1379  * i40evf_free_q_vectors - Free memory allocated for interrupt vectors
1380  * @adapter: board private structure to initialize
1381  *
1382  * This function frees the memory allocated to the q_vectors.  In addition if
1383  * NAPI is enabled it will delete any references to the NAPI struct prior
1384  * to freeing the q_vector.
1385  **/
1386 static void i40evf_free_q_vectors(struct i40evf_adapter *adapter)
1387 {
1388         int q_idx, num_q_vectors;
1389         int napi_vectors;
1390
1391         num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1392         napi_vectors = adapter->num_active_queues;
1393
1394         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1395                 struct i40e_q_vector *q_vector = &adapter->q_vectors[q_idx];
1396                 if (q_idx < napi_vectors)
1397                         netif_napi_del(&q_vector->napi);
1398         }
1399         kfree(adapter->q_vectors);
1400 }
1401
1402 /**
1403  * i40evf_reset_interrupt_capability - Reset MSIX setup
1404  * @adapter: board private structure
1405  *
1406  **/
1407 void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
1408 {
1409         pci_disable_msix(adapter->pdev);
1410         kfree(adapter->msix_entries);
1411         adapter->msix_entries = NULL;
1412 }
1413
1414 /**
1415  * i40evf_init_interrupt_scheme - Determine if MSIX is supported and init
1416  * @adapter: board private structure to initialize
1417  *
1418  **/
1419 int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter)
1420 {
1421         int err;
1422
1423         err = i40evf_set_interrupt_capability(adapter);
1424         if (err) {
1425                 dev_err(&adapter->pdev->dev,
1426                         "Unable to setup interrupt capabilities\n");
1427                 goto err_set_interrupt;
1428         }
1429
1430         err = i40evf_alloc_q_vectors(adapter);
1431         if (err) {
1432                 dev_err(&adapter->pdev->dev,
1433                         "Unable to allocate memory for queue vectors\n");
1434                 goto err_alloc_q_vectors;
1435         }
1436
1437         err = i40evf_alloc_queues(adapter);
1438         if (err) {
1439                 dev_err(&adapter->pdev->dev,
1440                         "Unable to allocate memory for queues\n");
1441                 goto err_alloc_queues;
1442         }
1443
1444         dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
1445                  (adapter->num_active_queues > 1) ? "Enabled" : "Disabled",
1446                  adapter->num_active_queues);
1447
1448         return 0;
1449 err_alloc_queues:
1450         i40evf_free_q_vectors(adapter);
1451 err_alloc_q_vectors:
1452         i40evf_reset_interrupt_capability(adapter);
1453 err_set_interrupt:
1454         return err;
1455 }
1456
1457 /**
1458  * i40evf_free_rss - Free memory used by RSS structs
1459  * @adapter: board private structure
1460  **/
1461 static void i40evf_free_rss(struct i40evf_adapter *adapter)
1462 {
1463         kfree(adapter->rss_key);
1464         adapter->rss_key = NULL;
1465
1466         kfree(adapter->rss_lut);
1467         adapter->rss_lut = NULL;
1468 }
1469
1470 /**
1471  * i40evf_watchdog_timer - Periodic call-back timer
1472  * @data: pointer to adapter disguised as unsigned long
1473  **/
1474 static void i40evf_watchdog_timer(unsigned long data)
1475 {
1476         struct i40evf_adapter *adapter = (struct i40evf_adapter *)data;
1477
1478         schedule_work(&adapter->watchdog_task);
1479         /* timer will be rescheduled in watchdog task */
1480 }
1481
1482 /**
1483  * i40evf_watchdog_task - Periodic call-back task
1484  * @work: pointer to work_struct
1485  **/
1486 static void i40evf_watchdog_task(struct work_struct *work)
1487 {
1488         struct i40evf_adapter *adapter = container_of(work,
1489                                                       struct i40evf_adapter,
1490                                                       watchdog_task);
1491         struct i40e_hw *hw = &adapter->hw;
1492         u32 reg_val;
1493
1494         if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
1495                 goto restart_watchdog;
1496
1497         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1498                 reg_val = rd32(hw, I40E_VFGEN_RSTAT) &
1499                           I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1500                 if ((reg_val == I40E_VFR_VFACTIVE) ||
1501                     (reg_val == I40E_VFR_COMPLETED)) {
1502                         /* A chance for redemption! */
1503                         dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
1504                         adapter->state = __I40EVF_STARTUP;
1505                         adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1506                         schedule_delayed_work(&adapter->init_task, 10);
1507                         clear_bit(__I40EVF_IN_CRITICAL_TASK,
1508                                   &adapter->crit_section);
1509                         /* Don't reschedule the watchdog, since we've restarted
1510                          * the init task. When init_task contacts the PF and
1511                          * gets everything set up again, it'll restart the
1512                          * watchdog for us. Down, boy. Sit. Stay. Woof.
1513                          */
1514                         return;
1515                 }
1516                 adapter->aq_required = 0;
1517                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1518                 goto watchdog_done;
1519         }
1520
1521         if ((adapter->state < __I40EVF_DOWN) ||
1522             (adapter->flags & I40EVF_FLAG_RESET_PENDING))
1523                 goto watchdog_done;
1524
1525         /* check for reset */
1526         reg_val = rd32(hw, I40E_VF_ARQLEN1) & I40E_VF_ARQLEN1_ARQENABLE_MASK;
1527         if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) && !reg_val) {
1528                 adapter->state = __I40EVF_RESETTING;
1529                 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1530                 dev_err(&adapter->pdev->dev, "Hardware reset detected\n");
1531                 schedule_work(&adapter->reset_task);
1532                 adapter->aq_required = 0;
1533                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1534                 goto watchdog_done;
1535         }
1536
1537         /* Process admin queue tasks. After init, everything gets done
1538          * here so we don't race on the admin queue.
1539          */
1540         if (adapter->current_op) {
1541                 if (!i40evf_asq_done(hw)) {
1542                         dev_dbg(&adapter->pdev->dev, "Admin queue timeout\n");
1543                         i40evf_send_api_ver(adapter);
1544                 }
1545                 goto watchdog_done;
1546         }
1547         if (adapter->aq_required & I40EVF_FLAG_AQ_GET_CONFIG) {
1548                 i40evf_send_vf_config_msg(adapter);
1549                 goto watchdog_done;
1550         }
1551
1552         if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
1553                 i40evf_disable_queues(adapter);
1554                 goto watchdog_done;
1555         }
1556
1557         if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
1558                 i40evf_map_queues(adapter);
1559                 goto watchdog_done;
1560         }
1561
1562         if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
1563                 i40evf_add_ether_addrs(adapter);
1564                 goto watchdog_done;
1565         }
1566
1567         if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
1568                 i40evf_add_vlans(adapter);
1569                 goto watchdog_done;
1570         }
1571
1572         if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
1573                 i40evf_del_ether_addrs(adapter);
1574                 goto watchdog_done;
1575         }
1576
1577         if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
1578                 i40evf_del_vlans(adapter);
1579                 goto watchdog_done;
1580         }
1581
1582         if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
1583                 i40evf_configure_queues(adapter);
1584                 goto watchdog_done;
1585         }
1586
1587         if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
1588                 i40evf_enable_queues(adapter);
1589                 goto watchdog_done;
1590         }
1591
1592         if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_RSS) {
1593                 /* This message goes straight to the firmware, not the
1594                  * PF, so we don't have to set current_op as we will
1595                  * not get a response through the ARQ.
1596                  */
1597                 i40evf_init_rss(adapter);
1598                 adapter->aq_required &= ~I40EVF_FLAG_AQ_CONFIGURE_RSS;
1599                 goto watchdog_done;
1600         }
1601         if (adapter->aq_required & I40EVF_FLAG_AQ_GET_HENA) {
1602                 i40evf_get_hena(adapter);
1603                 goto watchdog_done;
1604         }
1605         if (adapter->aq_required & I40EVF_FLAG_AQ_SET_HENA) {
1606                 i40evf_set_hena(adapter);
1607                 goto watchdog_done;
1608         }
1609         if (adapter->aq_required & I40EVF_FLAG_AQ_SET_RSS_KEY) {
1610                 i40evf_set_rss_key(adapter);
1611                 goto watchdog_done;
1612         }
1613         if (adapter->aq_required & I40EVF_FLAG_AQ_SET_RSS_LUT) {
1614                 i40evf_set_rss_lut(adapter);
1615                 goto watchdog_done;
1616         }
1617
1618         if (adapter->aq_required & I40EVF_FLAG_AQ_REQUEST_PROMISC) {
1619                 i40evf_set_promiscuous(adapter, I40E_FLAG_VF_UNICAST_PROMISC |
1620                                        I40E_FLAG_VF_MULTICAST_PROMISC);
1621                 goto watchdog_done;
1622         }
1623
1624         if (adapter->aq_required & I40EVF_FLAG_AQ_REQUEST_ALLMULTI) {
1625                 i40evf_set_promiscuous(adapter, I40E_FLAG_VF_MULTICAST_PROMISC);
1626                 goto watchdog_done;
1627         }
1628
1629         if ((adapter->aq_required & I40EVF_FLAG_AQ_RELEASE_PROMISC) &&
1630             (adapter->aq_required & I40EVF_FLAG_AQ_RELEASE_ALLMULTI)) {
1631                 i40evf_set_promiscuous(adapter, 0);
1632                 goto watchdog_done;
1633         }
1634
1635         if (adapter->state == __I40EVF_RUNNING)
1636                 i40evf_request_stats(adapter);
1637 watchdog_done:
1638         if (adapter->state == __I40EVF_RUNNING) {
1639                 i40evf_irq_enable_queues(adapter, ~0);
1640                 i40evf_fire_sw_int(adapter, 0xFF);
1641         } else {
1642                 i40evf_fire_sw_int(adapter, 0x1);
1643         }
1644
1645         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1646 restart_watchdog:
1647         if (adapter->state == __I40EVF_REMOVE)
1648                 return;
1649         if (adapter->aq_required)
1650                 mod_timer(&adapter->watchdog_timer,
1651                           jiffies + msecs_to_jiffies(20));
1652         else
1653                 mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
1654         schedule_work(&adapter->adminq_task);
1655 }
1656
1657 #define I40EVF_RESET_WAIT_MS 10
1658 #define I40EVF_RESET_WAIT_COUNT 500
1659 /**
1660  * i40evf_reset_task - Call-back task to handle hardware reset
1661  * @work: pointer to work_struct
1662  *
1663  * During reset we need to shut down and reinitialize the admin queue
1664  * before we can use it to communicate with the PF again. We also clear
1665  * and reinit the rings because that context is lost as well.
1666  **/
1667 static void i40evf_reset_task(struct work_struct *work)
1668 {
1669         struct i40evf_adapter *adapter = container_of(work,
1670                                                       struct i40evf_adapter,
1671                                                       reset_task);
1672         struct net_device *netdev = adapter->netdev;
1673         struct i40e_hw *hw = &adapter->hw;
1674         struct i40evf_vlan_filter *vlf;
1675         struct i40evf_mac_filter *f;
1676         u32 reg_val;
1677         int i = 0, err;
1678
1679         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1680                                 &adapter->crit_section))
1681                 usleep_range(500, 1000);
1682
1683         i40evf_misc_irq_disable(adapter);
1684         if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) {
1685                 adapter->flags &= ~I40EVF_FLAG_RESET_NEEDED;
1686                 /* Restart the AQ here. If we have been reset but didn't
1687                  * detect it, or if the PF had to reinit, our AQ will be hosed.
1688                  */
1689                 i40evf_shutdown_adminq(hw);
1690                 i40evf_init_adminq(hw);
1691                 i40evf_request_reset(adapter);
1692         }
1693         adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1694
1695         /* poll until we see the reset actually happen */
1696         for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1697                 reg_val = rd32(hw, I40E_VF_ARQLEN1) &
1698                           I40E_VF_ARQLEN1_ARQENABLE_MASK;
1699                 if (!reg_val)
1700                         break;
1701                 usleep_range(5000, 10000);
1702         }
1703         if (i == I40EVF_RESET_WAIT_COUNT) {
1704                 dev_info(&adapter->pdev->dev, "Never saw reset\n");
1705                 goto continue_reset; /* act like the reset happened */
1706         }
1707
1708         /* wait until the reset is complete and the PF is responding to us */
1709         for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1710                 reg_val = rd32(hw, I40E_VFGEN_RSTAT) &
1711                           I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1712                 if (reg_val == I40E_VFR_VFACTIVE)
1713                         break;
1714                 msleep(I40EVF_RESET_WAIT_MS);
1715         }
1716         pci_set_master(adapter->pdev);
1717         /* extra wait to make sure minimum wait is met */
1718         msleep(I40EVF_RESET_WAIT_MS);
1719         if (i == I40EVF_RESET_WAIT_COUNT) {
1720                 struct i40evf_mac_filter *ftmp;
1721                 struct i40evf_vlan_filter *fv, *fvtmp;
1722
1723                 /* reset never finished */
1724                 dev_err(&adapter->pdev->dev, "Reset never finished (%x)\n",
1725                         reg_val);
1726                 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
1727
1728                 if (netif_running(adapter->netdev)) {
1729                         set_bit(__I40E_DOWN, &adapter->vsi.state);
1730                         netif_carrier_off(netdev);
1731                         netif_tx_disable(netdev);
1732                         i40evf_napi_disable_all(adapter);
1733                         i40evf_irq_disable(adapter);
1734                         i40evf_free_traffic_irqs(adapter);
1735                         i40evf_free_all_tx_resources(adapter);
1736                         i40evf_free_all_rx_resources(adapter);
1737                 }
1738
1739                 /* Delete all of the filters, both MAC and VLAN. */
1740                 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list,
1741                                          list) {
1742                         list_del(&f->list);
1743                         kfree(f);
1744                 }
1745
1746                 list_for_each_entry_safe(fv, fvtmp, &adapter->vlan_filter_list,
1747                                          list) {
1748                         list_del(&fv->list);
1749                         kfree(fv);
1750                 }
1751
1752                 i40evf_free_misc_irq(adapter);
1753                 i40evf_reset_interrupt_capability(adapter);
1754                 i40evf_free_queues(adapter);
1755                 i40evf_free_q_vectors(adapter);
1756                 kfree(adapter->vf_res);
1757                 i40evf_shutdown_adminq(hw);
1758                 adapter->netdev->flags &= ~IFF_UP;
1759                 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1760                 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1761                 adapter->state = __I40EVF_DOWN;
1762                 dev_info(&adapter->pdev->dev, "Reset task did not complete, VF disabled\n");
1763                 return; /* Do not attempt to reinit. It's dead, Jim. */
1764         }
1765
1766 continue_reset:
1767         if (netif_running(adapter->netdev)) {
1768                 netif_carrier_off(netdev);
1769                 netif_tx_stop_all_queues(netdev);
1770                 i40evf_napi_disable_all(adapter);
1771         }
1772         i40evf_irq_disable(adapter);
1773
1774         adapter->state = __I40EVF_RESETTING;
1775         adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1776
1777         /* free the Tx/Rx rings and descriptors, might be better to just
1778          * re-use them sometime in the future
1779          */
1780         i40evf_free_all_rx_resources(adapter);
1781         i40evf_free_all_tx_resources(adapter);
1782
1783         /* kill and reinit the admin queue */
1784         if (i40evf_shutdown_adminq(hw))
1785                 dev_warn(&adapter->pdev->dev, "Failed to shut down adminq\n");
1786         adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1787         err = i40evf_init_adminq(hw);
1788         if (err)
1789                 dev_info(&adapter->pdev->dev, "Failed to init adminq: %d\n",
1790                          err);
1791
1792         adapter->aq_required = I40EVF_FLAG_AQ_GET_CONFIG;
1793         adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
1794
1795         /* re-add all MAC filters */
1796         list_for_each_entry(f, &adapter->mac_filter_list, list) {
1797                 f->add = true;
1798         }
1799         /* re-add all VLAN filters */
1800         list_for_each_entry(vlf, &adapter->vlan_filter_list, list) {
1801                 vlf->add = true;
1802         }
1803         adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
1804         adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
1805         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1806         i40evf_misc_irq_enable(adapter);
1807
1808         mod_timer(&adapter->watchdog_timer, jiffies + 2);
1809
1810         if (netif_running(adapter->netdev)) {
1811                 /* allocate transmit descriptors */
1812                 err = i40evf_setup_all_tx_resources(adapter);
1813                 if (err)
1814                         goto reset_err;
1815
1816                 /* allocate receive descriptors */
1817                 err = i40evf_setup_all_rx_resources(adapter);
1818                 if (err)
1819                         goto reset_err;
1820
1821                 i40evf_configure(adapter);
1822
1823                 err = i40evf_up_complete(adapter);
1824                 if (err)
1825                         goto reset_err;
1826
1827                 i40evf_irq_enable(adapter, true);
1828         } else {
1829                 adapter->state = __I40EVF_DOWN;
1830         }
1831
1832         return;
1833 reset_err:
1834         dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
1835         i40evf_close(adapter->netdev);
1836 }
1837
1838 /**
1839  * i40evf_adminq_task - worker thread to clean the admin queue
1840  * @work: pointer to work_struct containing our data
1841  **/
1842 static void i40evf_adminq_task(struct work_struct *work)
1843 {
1844         struct i40evf_adapter *adapter =
1845                 container_of(work, struct i40evf_adapter, adminq_task);
1846         struct i40e_hw *hw = &adapter->hw;
1847         struct i40e_arq_event_info event;
1848         struct i40e_virtchnl_msg *v_msg;
1849         i40e_status ret;
1850         u32 val, oldval;
1851         u16 pending;
1852
1853         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
1854                 goto out;
1855
1856         event.buf_len = I40EVF_MAX_AQ_BUF_SIZE;
1857         event.msg_buf = kzalloc(event.buf_len, GFP_KERNEL);
1858         if (!event.msg_buf)
1859                 goto out;
1860
1861         v_msg = (struct i40e_virtchnl_msg *)&event.desc;
1862         do {
1863                 ret = i40evf_clean_arq_element(hw, &event, &pending);
1864                 if (ret || !v_msg->v_opcode)
1865                         break; /* No event to process or error cleaning ARQ */
1866
1867                 i40evf_virtchnl_completion(adapter, v_msg->v_opcode,
1868                                            v_msg->v_retval, event.msg_buf,
1869                                            event.msg_len);
1870                 if (pending != 0)
1871                         memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
1872         } while (pending);
1873
1874         if ((adapter->flags &
1875              (I40EVF_FLAG_RESET_PENDING | I40EVF_FLAG_RESET_NEEDED)) ||
1876             adapter->state == __I40EVF_RESETTING)
1877                 goto freedom;
1878
1879         /* check for error indications */
1880         val = rd32(hw, hw->aq.arq.len);
1881         if (val == 0xdeadbeef) /* indicates device in reset */
1882                 goto freedom;
1883         oldval = val;
1884         if (val & I40E_VF_ARQLEN1_ARQVFE_MASK) {
1885                 dev_info(&adapter->pdev->dev, "ARQ VF Error detected\n");
1886                 val &= ~I40E_VF_ARQLEN1_ARQVFE_MASK;
1887         }
1888         if (val & I40E_VF_ARQLEN1_ARQOVFL_MASK) {
1889                 dev_info(&adapter->pdev->dev, "ARQ Overflow Error detected\n");
1890                 val &= ~I40E_VF_ARQLEN1_ARQOVFL_MASK;
1891         }
1892         if (val & I40E_VF_ARQLEN1_ARQCRIT_MASK) {
1893                 dev_info(&adapter->pdev->dev, "ARQ Critical Error detected\n");
1894                 val &= ~I40E_VF_ARQLEN1_ARQCRIT_MASK;
1895         }
1896         if (oldval != val)
1897                 wr32(hw, hw->aq.arq.len, val);
1898
1899         val = rd32(hw, hw->aq.asq.len);
1900         oldval = val;
1901         if (val & I40E_VF_ATQLEN1_ATQVFE_MASK) {
1902                 dev_info(&adapter->pdev->dev, "ASQ VF Error detected\n");
1903                 val &= ~I40E_VF_ATQLEN1_ATQVFE_MASK;
1904         }
1905         if (val & I40E_VF_ATQLEN1_ATQOVFL_MASK) {
1906                 dev_info(&adapter->pdev->dev, "ASQ Overflow Error detected\n");
1907                 val &= ~I40E_VF_ATQLEN1_ATQOVFL_MASK;
1908         }
1909         if (val & I40E_VF_ATQLEN1_ATQCRIT_MASK) {
1910                 dev_info(&adapter->pdev->dev, "ASQ Critical Error detected\n");
1911                 val &= ~I40E_VF_ATQLEN1_ATQCRIT_MASK;
1912         }
1913         if (oldval != val)
1914                 wr32(hw, hw->aq.asq.len, val);
1915
1916 freedom:
1917         kfree(event.msg_buf);
1918 out:
1919         /* re-enable Admin queue interrupt cause */
1920         i40evf_misc_irq_enable(adapter);
1921 }
1922
1923 /**
1924  * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
1925  * @adapter: board private structure
1926  *
1927  * Free all transmit software resources
1928  **/
1929 void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
1930 {
1931         int i;
1932
1933         if (!adapter->tx_rings)
1934                 return;
1935
1936         for (i = 0; i < adapter->num_active_queues; i++)
1937                 if (adapter->tx_rings[i].desc)
1938                         i40evf_free_tx_resources(&adapter->tx_rings[i]);
1939 }
1940
1941 /**
1942  * i40evf_setup_all_tx_resources - allocate all queues Tx resources
1943  * @adapter: board private structure
1944  *
1945  * If this function returns with an error, then it's possible one or
1946  * more of the rings is populated (while the rest are not).  It is the
1947  * callers duty to clean those orphaned rings.
1948  *
1949  * Return 0 on success, negative on failure
1950  **/
1951 static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter)
1952 {
1953         int i, err = 0;
1954
1955         for (i = 0; i < adapter->num_active_queues; i++) {
1956                 adapter->tx_rings[i].count = adapter->tx_desc_count;
1957                 err = i40evf_setup_tx_descriptors(&adapter->tx_rings[i]);
1958                 if (!err)
1959                         continue;
1960                 dev_err(&adapter->pdev->dev,
1961                         "Allocation for Tx Queue %u failed\n", i);
1962                 break;
1963         }
1964
1965         return err;
1966 }
1967
1968 /**
1969  * i40evf_setup_all_rx_resources - allocate all queues Rx resources
1970  * @adapter: board private structure
1971  *
1972  * If this function returns with an error, then it's possible one or
1973  * more of the rings is populated (while the rest are not).  It is the
1974  * callers duty to clean those orphaned rings.
1975  *
1976  * Return 0 on success, negative on failure
1977  **/
1978 static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter)
1979 {
1980         int i, err = 0;
1981
1982         for (i = 0; i < adapter->num_active_queues; i++) {
1983                 adapter->rx_rings[i].count = adapter->rx_desc_count;
1984                 err = i40evf_setup_rx_descriptors(&adapter->rx_rings[i]);
1985                 if (!err)
1986                         continue;
1987                 dev_err(&adapter->pdev->dev,
1988                         "Allocation for Rx Queue %u failed\n", i);
1989                 break;
1990         }
1991         return err;
1992 }
1993
1994 /**
1995  * i40evf_free_all_rx_resources - Free Rx Resources for All Queues
1996  * @adapter: board private structure
1997  *
1998  * Free all receive software resources
1999  **/
2000 void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
2001 {
2002         int i;
2003
2004         if (!adapter->rx_rings)
2005                 return;
2006
2007         for (i = 0; i < adapter->num_active_queues; i++)
2008                 if (adapter->rx_rings[i].desc)
2009                         i40evf_free_rx_resources(&adapter->rx_rings[i]);
2010 }
2011
2012 /**
2013  * i40evf_open - Called when a network interface is made active
2014  * @netdev: network interface device structure
2015  *
2016  * Returns 0 on success, negative value on failure
2017  *
2018  * The open entry point is called when a network interface is made
2019  * active by the system (IFF_UP).  At this point all resources needed
2020  * for transmit and receive operations are allocated, the interrupt
2021  * handler is registered with the OS, the watchdog timer is started,
2022  * and the stack is notified that the interface is ready.
2023  **/
2024 static int i40evf_open(struct net_device *netdev)
2025 {
2026         struct i40evf_adapter *adapter = netdev_priv(netdev);
2027         int err;
2028
2029         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
2030                 dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
2031                 return -EIO;
2032         }
2033
2034         if (adapter->state != __I40EVF_DOWN)
2035                 return -EBUSY;
2036
2037         /* allocate transmit descriptors */
2038         err = i40evf_setup_all_tx_resources(adapter);
2039         if (err)
2040                 goto err_setup_tx;
2041
2042         /* allocate receive descriptors */
2043         err = i40evf_setup_all_rx_resources(adapter);
2044         if (err)
2045                 goto err_setup_rx;
2046
2047         /* clear any pending interrupts, may auto mask */
2048         err = i40evf_request_traffic_irqs(adapter, netdev->name);
2049         if (err)
2050                 goto err_req_irq;
2051
2052         i40evf_add_filter(adapter, adapter->hw.mac.addr);
2053         i40evf_configure(adapter);
2054
2055         err = i40evf_up_complete(adapter);
2056         if (err)
2057                 goto err_req_irq;
2058
2059         i40evf_irq_enable(adapter, true);
2060
2061         return 0;
2062
2063 err_req_irq:
2064         i40evf_down(adapter);
2065         i40evf_free_traffic_irqs(adapter);
2066 err_setup_rx:
2067         i40evf_free_all_rx_resources(adapter);
2068 err_setup_tx:
2069         i40evf_free_all_tx_resources(adapter);
2070
2071         return err;
2072 }
2073
2074 /**
2075  * i40evf_close - Disables a network interface
2076  * @netdev: network interface device structure
2077  *
2078  * Returns 0, this is not allowed to fail
2079  *
2080  * The close entry point is called when an interface is de-activated
2081  * by the OS.  The hardware is still under the drivers control, but
2082  * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
2083  * are freed, along with all transmit and receive resources.
2084  **/
2085 static int i40evf_close(struct net_device *netdev)
2086 {
2087         struct i40evf_adapter *adapter = netdev_priv(netdev);
2088
2089         if (adapter->state <= __I40EVF_DOWN_PENDING)
2090                 return 0;
2091
2092
2093         set_bit(__I40E_DOWN, &adapter->vsi.state);
2094
2095         i40evf_down(adapter);
2096         adapter->state = __I40EVF_DOWN_PENDING;
2097         i40evf_free_traffic_irqs(adapter);
2098
2099         return 0;
2100 }
2101
2102 /**
2103  * i40evf_get_stats - Get System Network Statistics
2104  * @netdev: network interface device structure
2105  *
2106  * Returns the address of the device statistics structure.
2107  * The statistics are actually updated from the timer callback.
2108  **/
2109 static struct net_device_stats *i40evf_get_stats(struct net_device *netdev)
2110 {
2111         struct i40evf_adapter *adapter = netdev_priv(netdev);
2112
2113         /* only return the current stats */
2114         return &adapter->net_stats;
2115 }
2116
2117 /**
2118  * i40evf_change_mtu - Change the Maximum Transfer Unit
2119  * @netdev: network interface device structure
2120  * @new_mtu: new value for maximum frame size
2121  *
2122  * Returns 0 on success, negative on failure
2123  **/
2124 static int i40evf_change_mtu(struct net_device *netdev, int new_mtu)
2125 {
2126         struct i40evf_adapter *adapter = netdev_priv(netdev);
2127         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
2128
2129         if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
2130                 return -EINVAL;
2131
2132         netdev->mtu = new_mtu;
2133         adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
2134         schedule_work(&adapter->reset_task);
2135
2136         return 0;
2137 }
2138
2139 #define I40EVF_VLAN_FEATURES (NETIF_F_HW_VLAN_CTAG_TX |\
2140                               NETIF_F_HW_VLAN_CTAG_RX |\
2141                               NETIF_F_HW_VLAN_CTAG_FILTER)
2142
2143 /**
2144  * i40evf_fix_features - fix up the netdev feature bits
2145  * @netdev: our net device
2146  * @features: desired feature bits
2147  *
2148  * Returns fixed-up features bits
2149  **/
2150 static netdev_features_t i40evf_fix_features(struct net_device *netdev,
2151                                              netdev_features_t features)
2152 {
2153         struct i40evf_adapter *adapter = netdev_priv(netdev);
2154
2155         features &= ~I40EVF_VLAN_FEATURES;
2156         if (adapter->vf_res->vf_offload_flags & I40E_VIRTCHNL_VF_OFFLOAD_VLAN)
2157                 features |= I40EVF_VLAN_FEATURES;
2158         return features;
2159 }
2160
2161 static const struct net_device_ops i40evf_netdev_ops = {
2162         .ndo_open               = i40evf_open,
2163         .ndo_stop               = i40evf_close,
2164         .ndo_start_xmit         = i40evf_xmit_frame,
2165         .ndo_get_stats          = i40evf_get_stats,
2166         .ndo_set_rx_mode        = i40evf_set_rx_mode,
2167         .ndo_validate_addr      = eth_validate_addr,
2168         .ndo_set_mac_address    = i40evf_set_mac,
2169         .ndo_change_mtu         = i40evf_change_mtu,
2170         .ndo_tx_timeout         = i40evf_tx_timeout,
2171         .ndo_vlan_rx_add_vid    = i40evf_vlan_rx_add_vid,
2172         .ndo_vlan_rx_kill_vid   = i40evf_vlan_rx_kill_vid,
2173         .ndo_fix_features       = i40evf_fix_features,
2174 #ifdef CONFIG_NET_POLL_CONTROLLER
2175         .ndo_poll_controller    = i40evf_netpoll,
2176 #endif
2177 };
2178
2179 /**
2180  * i40evf_check_reset_complete - check that VF reset is complete
2181  * @hw: pointer to hw struct
2182  *
2183  * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
2184  **/
2185 static int i40evf_check_reset_complete(struct i40e_hw *hw)
2186 {
2187         u32 rstat;
2188         int i;
2189
2190         for (i = 0; i < 100; i++) {
2191                 rstat = rd32(hw, I40E_VFGEN_RSTAT) &
2192                             I40E_VFGEN_RSTAT_VFR_STATE_MASK;
2193                 if ((rstat == I40E_VFR_VFACTIVE) ||
2194                     (rstat == I40E_VFR_COMPLETED))
2195                         return 0;
2196                 usleep_range(10, 20);
2197         }
2198         return -EBUSY;
2199 }
2200
2201 /**
2202  * i40evf_process_config - Process the config information we got from the PF
2203  * @adapter: board private structure
2204  *
2205  * Verify that we have a valid config struct, and set up our netdev features
2206  * and our VSI struct.
2207  **/
2208 int i40evf_process_config(struct i40evf_adapter *adapter)
2209 {
2210         struct i40e_virtchnl_vf_resource *vfres = adapter->vf_res;
2211         struct net_device *netdev = adapter->netdev;
2212         struct i40e_vsi *vsi = &adapter->vsi;
2213         int i;
2214
2215         /* got VF config message back from PF, now we can parse it */
2216         for (i = 0; i < vfres->num_vsis; i++) {
2217                 if (vfres->vsi_res[i].vsi_type == I40E_VSI_SRIOV)
2218                         adapter->vsi_res = &vfres->vsi_res[i];
2219         }
2220         if (!adapter->vsi_res) {
2221                 dev_err(&adapter->pdev->dev, "No LAN VSI found\n");
2222                 return -ENODEV;
2223         }
2224
2225         netdev->hw_enc_features |= NETIF_F_SG                   |
2226                                    NETIF_F_IP_CSUM              |
2227                                    NETIF_F_IPV6_CSUM            |
2228                                    NETIF_F_HIGHDMA              |
2229                                    NETIF_F_SOFT_FEATURES        |
2230                                    NETIF_F_TSO                  |
2231                                    NETIF_F_TSO_ECN              |
2232                                    NETIF_F_TSO6                 |
2233                                    NETIF_F_GSO_GRE              |
2234                                    NETIF_F_GSO_GRE_CSUM         |
2235                                    NETIF_F_GSO_IPXIP4           |
2236                                    NETIF_F_GSO_IPXIP6           |
2237                                    NETIF_F_GSO_UDP_TUNNEL       |
2238                                    NETIF_F_GSO_UDP_TUNNEL_CSUM  |
2239                                    NETIF_F_GSO_PARTIAL          |
2240                                    NETIF_F_SCTP_CRC             |
2241                                    NETIF_F_RXHASH               |
2242                                    NETIF_F_RXCSUM               |
2243                                    0;
2244
2245         if (!(adapter->flags & I40EVF_FLAG_OUTER_UDP_CSUM_CAPABLE))
2246                 netdev->gso_partial_features |= NETIF_F_GSO_UDP_TUNNEL_CSUM;
2247
2248         netdev->gso_partial_features |= NETIF_F_GSO_GRE_CSUM;
2249
2250         /* record features VLANs can make use of */
2251         netdev->vlan_features |= netdev->hw_enc_features |
2252                                  NETIF_F_TSO_MANGLEID;
2253
2254         /* Write features and hw_features separately to avoid polluting
2255          * with, or dropping, features that are set when we registgered.
2256          */
2257         netdev->hw_features |= netdev->hw_enc_features;
2258
2259         netdev->features |= netdev->hw_enc_features | I40EVF_VLAN_FEATURES;
2260         netdev->hw_enc_features |= NETIF_F_TSO_MANGLEID;
2261
2262         /* disable VLAN features if not supported */
2263         if (!(vfres->vf_offload_flags & I40E_VIRTCHNL_VF_OFFLOAD_VLAN))
2264                 netdev->features ^= I40EVF_VLAN_FEATURES;
2265
2266         adapter->vsi.id = adapter->vsi_res->vsi_id;
2267
2268         adapter->vsi.back = adapter;
2269         adapter->vsi.base_vector = 1;
2270         adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
2271         adapter->vsi.rx_itr_setting = (I40E_ITR_DYNAMIC |
2272                                        ITR_REG_TO_USEC(I40E_ITR_RX_DEF));
2273         adapter->vsi.tx_itr_setting = (I40E_ITR_DYNAMIC |
2274                                        ITR_REG_TO_USEC(I40E_ITR_TX_DEF));
2275         vsi->netdev = adapter->netdev;
2276         vsi->qs_handle = adapter->vsi_res->qset_handle;
2277         if (vfres->vf_offload_flags & I40E_VIRTCHNL_VF_OFFLOAD_RSS_PF) {
2278                 adapter->rss_key_size = vfres->rss_key_size;
2279                 adapter->rss_lut_size = vfres->rss_lut_size;
2280         } else {
2281                 adapter->rss_key_size = I40EVF_HKEY_ARRAY_SIZE;
2282                 adapter->rss_lut_size = I40EVF_HLUT_ARRAY_SIZE;
2283         }
2284
2285         return 0;
2286 }
2287
2288 /**
2289  * i40evf_init_task - worker thread to perform delayed initialization
2290  * @work: pointer to work_struct containing our data
2291  *
2292  * This task completes the work that was begun in probe. Due to the nature
2293  * of VF-PF communications, we may need to wait tens of milliseconds to get
2294  * responses back from the PF. Rather than busy-wait in probe and bog down the
2295  * whole system, we'll do it in a task so we can sleep.
2296  * This task only runs during driver init. Once we've established
2297  * communications with the PF driver and set up our netdev, the watchdog
2298  * takes over.
2299  **/
2300 static void i40evf_init_task(struct work_struct *work)
2301 {
2302         struct i40evf_adapter *adapter = container_of(work,
2303                                                       struct i40evf_adapter,
2304                                                       init_task.work);
2305         struct net_device *netdev = adapter->netdev;
2306         struct i40e_hw *hw = &adapter->hw;
2307         struct pci_dev *pdev = adapter->pdev;
2308         int err, bufsz;
2309
2310         switch (adapter->state) {
2311         case __I40EVF_STARTUP:
2312                 /* driver loaded, probe complete */
2313                 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
2314                 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
2315                 err = i40e_set_mac_type(hw);
2316                 if (err) {
2317                         dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
2318                                 err);
2319                         goto err;
2320                 }
2321                 err = i40evf_check_reset_complete(hw);
2322                 if (err) {
2323                         dev_info(&pdev->dev, "Device is still in reset (%d), retrying\n",
2324                                  err);
2325                         goto err;
2326                 }
2327                 hw->aq.num_arq_entries = I40EVF_AQ_LEN;
2328                 hw->aq.num_asq_entries = I40EVF_AQ_LEN;
2329                 hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2330                 hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2331
2332                 err = i40evf_init_adminq(hw);
2333                 if (err) {
2334                         dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
2335                                 err);
2336                         goto err;
2337                 }
2338                 err = i40evf_send_api_ver(adapter);
2339                 if (err) {
2340                         dev_err(&pdev->dev, "Unable to send to PF (%d)\n", err);
2341                         i40evf_shutdown_adminq(hw);
2342                         goto err;
2343                 }
2344                 adapter->state = __I40EVF_INIT_VERSION_CHECK;
2345                 goto restart;
2346         case __I40EVF_INIT_VERSION_CHECK:
2347                 if (!i40evf_asq_done(hw)) {
2348                         dev_err(&pdev->dev, "Admin queue command never completed\n");
2349                         i40evf_shutdown_adminq(hw);
2350                         adapter->state = __I40EVF_STARTUP;
2351                         goto err;
2352                 }
2353
2354                 /* aq msg sent, awaiting reply */
2355                 err = i40evf_verify_api_ver(adapter);
2356                 if (err) {
2357                         if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
2358                                 err = i40evf_send_api_ver(adapter);
2359                         else
2360                                 dev_err(&pdev->dev, "Unsupported PF API version %d.%d, expected %d.%d\n",
2361                                         adapter->pf_version.major,
2362                                         adapter->pf_version.minor,
2363                                         I40E_VIRTCHNL_VERSION_MAJOR,
2364                                         I40E_VIRTCHNL_VERSION_MINOR);
2365                         goto err;
2366                 }
2367                 err = i40evf_send_vf_config_msg(adapter);
2368                 if (err) {
2369                         dev_err(&pdev->dev, "Unable to send config request (%d)\n",
2370                                 err);
2371                         goto err;
2372                 }
2373                 adapter->state = __I40EVF_INIT_GET_RESOURCES;
2374                 goto restart;
2375         case __I40EVF_INIT_GET_RESOURCES:
2376                 /* aq msg sent, awaiting reply */
2377                 if (!adapter->vf_res) {
2378                         bufsz = sizeof(struct i40e_virtchnl_vf_resource) +
2379                                 (I40E_MAX_VF_VSI *
2380                                  sizeof(struct i40e_virtchnl_vsi_resource));
2381                         adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
2382                         if (!adapter->vf_res)
2383                                 goto err;
2384                 }
2385                 err = i40evf_get_vf_config(adapter);
2386                 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK) {
2387                         err = i40evf_send_vf_config_msg(adapter);
2388                         goto err;
2389                 } else if (err == I40E_ERR_PARAM) {
2390                         /* We only get ERR_PARAM if the device is in a very bad
2391                          * state or if we've been disabled for previous bad
2392                          * behavior. Either way, we're done now.
2393                          */
2394                         i40evf_shutdown_adminq(hw);
2395                         dev_err(&pdev->dev, "Unable to get VF config due to PF error condition, not retrying\n");
2396                         return;
2397                 }
2398                 if (err) {
2399                         dev_err(&pdev->dev, "Unable to get VF config (%d)\n",
2400                                 err);
2401                         goto err_alloc;
2402                 }
2403                 adapter->state = __I40EVF_INIT_SW;
2404                 break;
2405         default:
2406                 goto err_alloc;
2407         }
2408
2409         if (hw->mac.type == I40E_MAC_X722_VF)
2410                 adapter->flags |= I40EVF_FLAG_OUTER_UDP_CSUM_CAPABLE;
2411
2412         if (i40evf_process_config(adapter))
2413                 goto err_alloc;
2414         adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
2415
2416         adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
2417
2418         netdev->netdev_ops = &i40evf_netdev_ops;
2419         i40evf_set_ethtool_ops(netdev);
2420         netdev->watchdog_timeo = 5 * HZ;
2421
2422         if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
2423                 dev_info(&pdev->dev, "Invalid MAC address %pM, using random\n",
2424                          adapter->hw.mac.addr);
2425                 eth_hw_addr_random(netdev);
2426                 ether_addr_copy(adapter->hw.mac.addr, netdev->dev_addr);
2427         } else {
2428                 adapter->flags |= I40EVF_FLAG_ADDR_SET_BY_PF;
2429                 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
2430                 ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
2431         }
2432
2433         init_timer(&adapter->watchdog_timer);
2434         adapter->watchdog_timer.function = &i40evf_watchdog_timer;
2435         adapter->watchdog_timer.data = (unsigned long)adapter;
2436         mod_timer(&adapter->watchdog_timer, jiffies + 1);
2437
2438         adapter->num_active_queues = min_t(int,
2439                                            adapter->vsi_res->num_queue_pairs,
2440                                            (int)(num_online_cpus()));
2441         adapter->tx_desc_count = I40EVF_DEFAULT_TXD;
2442         adapter->rx_desc_count = I40EVF_DEFAULT_RXD;
2443         err = i40evf_init_interrupt_scheme(adapter);
2444         if (err)
2445                 goto err_sw_init;
2446         i40evf_map_rings_to_vectors(adapter);
2447         if (adapter->vf_res->vf_offload_flags &
2448             I40E_VIRTCHNL_VF_OFFLOAD_WB_ON_ITR)
2449                 adapter->flags |= I40EVF_FLAG_WB_ON_ITR_CAPABLE;
2450
2451         err = i40evf_request_misc_irq(adapter);
2452         if (err)
2453                 goto err_sw_init;
2454
2455         netif_carrier_off(netdev);
2456
2457         if (!adapter->netdev_registered) {
2458                 err = register_netdev(netdev);
2459                 if (err)
2460                         goto err_register;
2461         }
2462
2463         adapter->netdev_registered = true;
2464
2465         netif_tx_stop_all_queues(netdev);
2466
2467         dev_info(&pdev->dev, "MAC address: %pM\n", adapter->hw.mac.addr);
2468         if (netdev->features & NETIF_F_GRO)
2469                 dev_info(&pdev->dev, "GRO is enabled\n");
2470
2471         adapter->state = __I40EVF_DOWN;
2472         set_bit(__I40E_DOWN, &adapter->vsi.state);
2473         i40evf_misc_irq_enable(adapter);
2474
2475         adapter->rss_key = kzalloc(adapter->rss_key_size, GFP_KERNEL);
2476         adapter->rss_lut = kzalloc(adapter->rss_lut_size, GFP_KERNEL);
2477         if (!adapter->rss_key || !adapter->rss_lut)
2478                 goto err_mem;
2479
2480         if (RSS_AQ(adapter)) {
2481                 adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_RSS;
2482                 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
2483         } else {
2484                 i40evf_init_rss(adapter);
2485         }
2486         return;
2487 restart:
2488         schedule_delayed_work(&adapter->init_task, msecs_to_jiffies(30));
2489         return;
2490 err_mem:
2491         i40evf_free_rss(adapter);
2492 err_register:
2493         i40evf_free_misc_irq(adapter);
2494 err_sw_init:
2495         i40evf_reset_interrupt_capability(adapter);
2496 err_alloc:
2497         kfree(adapter->vf_res);
2498         adapter->vf_res = NULL;
2499 err:
2500         /* Things went into the weeds, so try again later */
2501         if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
2502                 dev_err(&pdev->dev, "Failed to communicate with PF; waiting before retry\n");
2503                 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
2504                 i40evf_shutdown_adminq(hw);
2505                 adapter->state = __I40EVF_STARTUP;
2506                 schedule_delayed_work(&adapter->init_task, HZ * 5);
2507                 return;
2508         }
2509         schedule_delayed_work(&adapter->init_task, HZ);
2510 }
2511
2512 /**
2513  * i40evf_shutdown - Shutdown the device in preparation for a reboot
2514  * @pdev: pci device structure
2515  **/
2516 static void i40evf_shutdown(struct pci_dev *pdev)
2517 {
2518         struct net_device *netdev = pci_get_drvdata(pdev);
2519         struct i40evf_adapter *adapter = netdev_priv(netdev);
2520
2521         netif_device_detach(netdev);
2522
2523         if (netif_running(netdev))
2524                 i40evf_close(netdev);
2525
2526         /* Prevent the watchdog from running. */
2527         adapter->state = __I40EVF_REMOVE;
2528         adapter->aq_required = 0;
2529
2530 #ifdef CONFIG_PM
2531         pci_save_state(pdev);
2532
2533 #endif
2534         pci_disable_device(pdev);
2535 }
2536
2537 /**
2538  * i40evf_probe - Device Initialization Routine
2539  * @pdev: PCI device information struct
2540  * @ent: entry in i40evf_pci_tbl
2541  *
2542  * Returns 0 on success, negative on failure
2543  *
2544  * i40evf_probe initializes an adapter identified by a pci_dev structure.
2545  * The OS initialization, configuring of the adapter private structure,
2546  * and a hardware reset occur.
2547  **/
2548 static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2549 {
2550         struct net_device *netdev;
2551         struct i40evf_adapter *adapter = NULL;
2552         struct i40e_hw *hw = NULL;
2553         int err;
2554
2555         err = pci_enable_device(pdev);
2556         if (err)
2557                 return err;
2558
2559         err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
2560         if (err) {
2561                 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2562                 if (err) {
2563                         dev_err(&pdev->dev,
2564                                 "DMA configuration failed: 0x%x\n", err);
2565                         goto err_dma;
2566                 }
2567         }
2568
2569         err = pci_request_regions(pdev, i40evf_driver_name);
2570         if (err) {
2571                 dev_err(&pdev->dev,
2572                         "pci_request_regions failed 0x%x\n", err);
2573                 goto err_pci_reg;
2574         }
2575
2576         pci_enable_pcie_error_reporting(pdev);
2577
2578         pci_set_master(pdev);
2579
2580         netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter), MAX_QUEUES);
2581         if (!netdev) {
2582                 err = -ENOMEM;
2583                 goto err_alloc_etherdev;
2584         }
2585
2586         SET_NETDEV_DEV(netdev, &pdev->dev);
2587
2588         pci_set_drvdata(pdev, netdev);
2589         adapter = netdev_priv(netdev);
2590
2591         adapter->netdev = netdev;
2592         adapter->pdev = pdev;
2593
2594         hw = &adapter->hw;
2595         hw->back = adapter;
2596
2597         adapter->msg_enable = BIT(DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
2598         adapter->state = __I40EVF_STARTUP;
2599
2600         /* Call save state here because it relies on the adapter struct. */
2601         pci_save_state(pdev);
2602
2603         hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
2604                               pci_resource_len(pdev, 0));
2605         if (!hw->hw_addr) {
2606                 err = -EIO;
2607                 goto err_ioremap;
2608         }
2609         hw->vendor_id = pdev->vendor;
2610         hw->device_id = pdev->device;
2611         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2612         hw->subsystem_vendor_id = pdev->subsystem_vendor;
2613         hw->subsystem_device_id = pdev->subsystem_device;
2614         hw->bus.device = PCI_SLOT(pdev->devfn);
2615         hw->bus.func = PCI_FUNC(pdev->devfn);
2616
2617         /* set up the locks for the AQ, do this only once in probe
2618          * and destroy them only once in remove
2619          */
2620         mutex_init(&hw->aq.asq_mutex);
2621         mutex_init(&hw->aq.arq_mutex);
2622
2623         INIT_LIST_HEAD(&adapter->mac_filter_list);
2624         INIT_LIST_HEAD(&adapter->vlan_filter_list);
2625
2626         INIT_WORK(&adapter->reset_task, i40evf_reset_task);
2627         INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
2628         INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
2629         INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
2630         schedule_delayed_work(&adapter->init_task,
2631                               msecs_to_jiffies(5 * (pdev->devfn & 0x07)));
2632
2633         return 0;
2634
2635 err_ioremap:
2636         free_netdev(netdev);
2637 err_alloc_etherdev:
2638         pci_release_regions(pdev);
2639 err_pci_reg:
2640 err_dma:
2641         pci_disable_device(pdev);
2642         return err;
2643 }
2644
2645 #ifdef CONFIG_PM
2646 /**
2647  * i40evf_suspend - Power management suspend routine
2648  * @pdev: PCI device information struct
2649  * @state: unused
2650  *
2651  * Called when the system (VM) is entering sleep/suspend.
2652  **/
2653 static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
2654 {
2655         struct net_device *netdev = pci_get_drvdata(pdev);
2656         struct i40evf_adapter *adapter = netdev_priv(netdev);
2657         int retval = 0;
2658
2659         netif_device_detach(netdev);
2660
2661         if (netif_running(netdev)) {
2662                 rtnl_lock();
2663                 i40evf_down(adapter);
2664                 rtnl_unlock();
2665         }
2666         i40evf_free_misc_irq(adapter);
2667         i40evf_reset_interrupt_capability(adapter);
2668
2669         retval = pci_save_state(pdev);
2670         if (retval)
2671                 return retval;
2672
2673         pci_disable_device(pdev);
2674
2675         return 0;
2676 }
2677
2678 /**
2679  * i40evf_resume - Power management resume routine
2680  * @pdev: PCI device information struct
2681  *
2682  * Called when the system (VM) is resumed from sleep/suspend.
2683  **/
2684 static int i40evf_resume(struct pci_dev *pdev)
2685 {
2686         struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
2687         struct net_device *netdev = adapter->netdev;
2688         u32 err;
2689
2690         pci_set_power_state(pdev, PCI_D0);
2691         pci_restore_state(pdev);
2692         /* pci_restore_state clears dev->state_saved so call
2693          * pci_save_state to restore it.
2694          */
2695         pci_save_state(pdev);
2696
2697         err = pci_enable_device_mem(pdev);
2698         if (err) {
2699                 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
2700                 return err;
2701         }
2702         pci_set_master(pdev);
2703
2704         rtnl_lock();
2705         err = i40evf_set_interrupt_capability(adapter);
2706         if (err) {
2707                 rtnl_unlock();
2708                 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
2709                 return err;
2710         }
2711         err = i40evf_request_misc_irq(adapter);
2712         rtnl_unlock();
2713         if (err) {
2714                 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
2715                 return err;
2716         }
2717
2718         schedule_work(&adapter->reset_task);
2719
2720         netif_device_attach(netdev);
2721
2722         return err;
2723 }
2724
2725 #endif /* CONFIG_PM */
2726 /**
2727  * i40evf_remove - Device Removal Routine
2728  * @pdev: PCI device information struct
2729  *
2730  * i40evf_remove is called by the PCI subsystem to alert the driver
2731  * that it should release a PCI device.  The could be caused by a
2732  * Hot-Plug event, or because the driver is going to be removed from
2733  * memory.
2734  **/
2735 static void i40evf_remove(struct pci_dev *pdev)
2736 {
2737         struct net_device *netdev = pci_get_drvdata(pdev);
2738         struct i40evf_adapter *adapter = netdev_priv(netdev);
2739         struct i40evf_mac_filter *f, *ftmp;
2740         struct i40e_hw *hw = &adapter->hw;
2741
2742         cancel_delayed_work_sync(&adapter->init_task);
2743         cancel_work_sync(&adapter->reset_task);
2744
2745         if (adapter->netdev_registered) {
2746                 unregister_netdev(netdev);
2747                 adapter->netdev_registered = false;
2748         }
2749
2750         /* Shut down all the garbage mashers on the detention level */
2751         adapter->state = __I40EVF_REMOVE;
2752         adapter->aq_required = 0;
2753         i40evf_request_reset(adapter);
2754         msleep(50);
2755         /* If the FW isn't responding, kick it once, but only once. */
2756         if (!i40evf_asq_done(hw)) {
2757                 i40evf_request_reset(adapter);
2758                 msleep(50);
2759         }
2760
2761         if (adapter->msix_entries) {
2762                 i40evf_misc_irq_disable(adapter);
2763                 i40evf_free_misc_irq(adapter);
2764                 i40evf_reset_interrupt_capability(adapter);
2765                 i40evf_free_q_vectors(adapter);
2766         }
2767
2768         if (adapter->watchdog_timer.function)
2769                 del_timer_sync(&adapter->watchdog_timer);
2770
2771         flush_scheduled_work();
2772
2773         i40evf_free_rss(adapter);
2774
2775         if (hw->aq.asq.count)
2776                 i40evf_shutdown_adminq(hw);
2777
2778         /* destroy the locks only once, here */
2779         mutex_destroy(&hw->aq.arq_mutex);
2780         mutex_destroy(&hw->aq.asq_mutex);
2781
2782         iounmap(hw->hw_addr);
2783         pci_release_regions(pdev);
2784         i40evf_free_all_tx_resources(adapter);
2785         i40evf_free_all_rx_resources(adapter);
2786         i40evf_free_queues(adapter);
2787         kfree(adapter->vf_res);
2788         /* If we got removed before an up/down sequence, we've got a filter
2789          * hanging out there that we need to get rid of.
2790          */
2791         list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
2792                 list_del(&f->list);
2793                 kfree(f);
2794         }
2795         list_for_each_entry_safe(f, ftmp, &adapter->vlan_filter_list, list) {
2796                 list_del(&f->list);
2797                 kfree(f);
2798         }
2799
2800         free_netdev(netdev);
2801
2802         pci_disable_pcie_error_reporting(pdev);
2803
2804         pci_disable_device(pdev);
2805 }
2806
2807 static struct pci_driver i40evf_driver = {
2808         .name     = i40evf_driver_name,
2809         .id_table = i40evf_pci_tbl,
2810         .probe    = i40evf_probe,
2811         .remove   = i40evf_remove,
2812 #ifdef CONFIG_PM
2813         .suspend  = i40evf_suspend,
2814         .resume   = i40evf_resume,
2815 #endif
2816         .shutdown = i40evf_shutdown,
2817 };
2818
2819 /**
2820  * i40e_init_module - Driver Registration Routine
2821  *
2822  * i40e_init_module is the first routine called when the driver is
2823  * loaded. All it does is register with the PCI subsystem.
2824  **/
2825 static int __init i40evf_init_module(void)
2826 {
2827         int ret;
2828
2829         pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
2830                 i40evf_driver_version);
2831
2832         pr_info("%s\n", i40evf_copyright);
2833
2834         i40evf_wq = create_singlethread_workqueue(i40evf_driver_name);
2835         if (!i40evf_wq) {
2836                 pr_err("%s: Failed to create workqueue\n", i40evf_driver_name);
2837                 return -ENOMEM;
2838         }
2839         ret = pci_register_driver(&i40evf_driver);
2840         return ret;
2841 }
2842
2843 module_init(i40evf_init_module);
2844
2845 /**
2846  * i40e_exit_module - Driver Exit Cleanup Routine
2847  *
2848  * i40e_exit_module is called just before the driver is removed
2849  * from memory.
2850  **/
2851 static void __exit i40evf_exit_module(void)
2852 {
2853         pci_unregister_driver(&i40evf_driver);
2854         destroy_workqueue(i40evf_wq);
2855 }
2856
2857 module_exit(i40evf_exit_module);
2858
2859 /* i40evf_main.c */