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

   1 /*******************************************************************************
   2  *
   3  * Intel Ethernet Controller XL710 Family Linux Virtual Function Driver
   4  * Copyright(c) 2013 - 2014 Intel Corporation.
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms and conditions of the GNU General Public License,
   8  * version 2, as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  * The full GNU General Public License is included in this distribution in
  19  * the file called "COPYING".
  20  *
  21  * Contact Information:
  22  * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  23  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  24  *
  25  ******************************************************************************/
  26
  27 #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 void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter);
  32 static void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter);
  33 static int i40evf_close(struct net_device *netdev);
  34
  35 char i40evf_driver_name[] = "i40evf";
  36 static const char i40evf_driver_string[] =
  37         "Intel(R) XL710/X710 Virtual Function Network Driver";
  38
  39 #define DRV_VERSION "0.9.40"
  40 const char i40evf_driver_version[] = DRV_VERSION;
  41 static const char i40evf_copyright[] =
  42         "Copyright (c) 2013 - 2014 Intel Corporation.";
  43
  44 /* i40evf_pci_tbl - PCI Device ID Table
  45  *
  46  * Wildcard entries (PCI_ANY_ID) should come last
  47  * Last entry must be all 0s
  48  *
  49  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  50  *   Class, Class Mask, private data (not used) }
  51  */
  52 static DEFINE_PCI_DEVICE_TABLE(i40evf_pci_tbl) = {
  53         {PCI_VDEVICE(INTEL, I40E_DEV_ID_VF), 0},
  54         /* required last entry */
  55         {0, }
  56 };
  57
  58 MODULE_DEVICE_TABLE(pci, i40evf_pci_tbl);
  59
  60 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
  61 MODULE_DESCRIPTION("Intel(R) XL710 X710 Virtual Function Network Driver");
  62 MODULE_LICENSE("GPL");
  63 MODULE_VERSION(DRV_VERSION);
  64
  65 /**
  66  * i40evf_allocate_dma_mem_d - OS specific memory alloc for shared code
  67  * @hw:   pointer to the HW structure
  68  * @mem:  ptr to mem struct to fill out
  69  * @size: size of memory requested
  70  * @alignment: what to align the allocation to
  71  **/
  72 i40e_status i40evf_allocate_dma_mem_d(struct i40e_hw *hw,
  73                                       struct i40e_dma_mem *mem,
  74                                       u64 size, u32 alignment)
  75 {
  76         struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
  77
  78         if (!mem)
  79                 return I40E_ERR_PARAM;
  80
  81         mem->size = ALIGN(size, alignment);
  82         mem->va = dma_alloc_coherent(&adapter->pdev->dev, mem->size,
  83                                      (dma_addr_t *)&mem->pa, GFP_KERNEL);
  84         if (mem->va)
  85                 return 0;
  86         else
  87                 return I40E_ERR_NO_MEMORY;
  88 }
  89
  90 /**
  91  * i40evf_free_dma_mem_d - OS specific memory free for shared code
  92  * @hw:   pointer to the HW structure
  93  * @mem:  ptr to mem struct to free
  94  **/
  95 i40e_status i40evf_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem)
  96 {
  97         struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
  98
  99         if (!mem || !mem->va)
 100                 return I40E_ERR_PARAM;
 101         dma_free_coherent(&adapter->pdev->dev, mem->size,
 102                           mem->va, (dma_addr_t)mem->pa);
 103         return 0;
 104 }
 105
 106 /**
 107  * i40evf_allocate_virt_mem_d - OS specific memory alloc for shared code
 108  * @hw:   pointer to the HW structure
 109  * @mem:  ptr to mem struct to fill out
 110  * @size: size of memory requested
 111  **/
 112 i40e_status i40evf_allocate_virt_mem_d(struct i40e_hw *hw,
 113                                        struct i40e_virt_mem *mem, u32 size)
 114 {
 115         if (!mem)
 116                 return I40E_ERR_PARAM;
 117
 118         mem->size = size;
 119         mem->va = kzalloc(size, GFP_KERNEL);
 120
 121         if (mem->va)
 122                 return 0;
 123         else
 124                 return I40E_ERR_NO_MEMORY;
 125 }
 126
 127 /**
 128  * i40evf_free_virt_mem_d - OS specific memory free for shared code
 129  * @hw:   pointer to the HW structure
 130  * @mem:  ptr to mem struct to free
 131  **/
 132 i40e_status i40evf_free_virt_mem_d(struct i40e_hw *hw,
 133                                    struct i40e_virt_mem *mem)
 134 {
 135         if (!mem)
 136                 return I40E_ERR_PARAM;
 137
 138         /* it's ok to kfree a NULL pointer */
 139         kfree(mem->va);
 140
 141         return 0;
 142 }
 143
 144 /**
 145  * i40evf_debug_d - OS dependent version of debug printing
 146  * @hw:  pointer to the HW structure
 147  * @mask: debug level mask
 148  * @fmt_str: printf-type format description
 149  **/
 150 void i40evf_debug_d(void *hw, u32 mask, char *fmt_str, ...)
 151 {
 152         char buf[512];
 153         va_list argptr;
 154
 155         if (!(mask & ((struct i40e_hw *)hw)->debug_mask))
 156                 return;
 157
 158         va_start(argptr, fmt_str);
 159         vsnprintf(buf, sizeof(buf), fmt_str, argptr);
 160         va_end(argptr);
 161
 162         /* the debug string is already formatted with a newline */
 163         pr_info("%s", buf);
 164 }
 165
 166 /**
 167  * i40evf_tx_timeout - Respond to a Tx Hang
 168  * @netdev: network interface device structure
 169  **/
 170 static void i40evf_tx_timeout(struct net_device *netdev)
 171 {
 172         struct i40evf_adapter *adapter = netdev_priv(netdev);
 173
 174         adapter->tx_timeout_count++;
 175         if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING)) {
 176                 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
 177                 schedule_work(&adapter->reset_task);
 178         }
 179 }
 180
 181 /**
 182  * i40evf_misc_irq_disable - Mask off interrupt generation on the NIC
 183  * @adapter: board private structure
 184  **/
 185 static void i40evf_misc_irq_disable(struct i40evf_adapter *adapter)
 186 {
 187         struct i40e_hw *hw = &adapter->hw;
 188         wr32(hw, I40E_VFINT_DYN_CTL01, 0);
 189
 190         /* read flush */
 191         rd32(hw, I40E_VFGEN_RSTAT);
 192
 193         synchronize_irq(adapter->msix_entries[0].vector);
 194 }
 195
 196 /**
 197  * i40evf_misc_irq_enable - Enable default interrupt generation settings
 198  * @adapter: board private structure
 199  **/
 200 static void i40evf_misc_irq_enable(struct i40evf_adapter *adapter)
 201 {
 202         struct i40e_hw *hw = &adapter->hw;
 203         wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK |
 204                                        I40E_VFINT_DYN_CTL01_ITR_INDX_MASK);
 205         wr32(hw, I40E_VFINT_ICR0_ENA1, I40E_VFINT_ICR0_ENA_ADMINQ_MASK);
 206
 207         /* read flush */
 208         rd32(hw, I40E_VFGEN_RSTAT);
 209 }
 210
 211 /**
 212  * i40evf_irq_disable - Mask off interrupt generation on the NIC
 213  * @adapter: board private structure
 214  **/
 215 static void i40evf_irq_disable(struct i40evf_adapter *adapter)
 216 {
 217         int i;
 218         struct i40e_hw *hw = &adapter->hw;
 219
 220         if (!adapter->msix_entries)
 221                 return;
 222
 223         for (i = 1; i < adapter->num_msix_vectors; i++) {
 224                 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), 0);
 225                 synchronize_irq(adapter->msix_entries[i].vector);
 226         }
 227         /* read flush */
 228         rd32(hw, I40E_VFGEN_RSTAT);
 229
 230 }
 231
 232 /**
 233  * i40evf_irq_enable_queues - Enable interrupt for specified queues
 234  * @adapter: board private structure
 235  * @mask: bitmap of queues to enable
 236  **/
 237 void i40evf_irq_enable_queues(struct i40evf_adapter *adapter, u32 mask)
 238 {
 239         struct i40e_hw *hw = &adapter->hw;
 240         int i;
 241
 242         for (i = 1; i < adapter->num_msix_vectors; i++) {
 243                 if (mask & (1 << (i - 1))) {
 244                         wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1),
 245                              I40E_VFINT_DYN_CTLN1_INTENA_MASK |
 246                              I40E_VFINT_DYN_CTLN_CLEARPBA_MASK);
 247                 }
 248         }
 249 }
 250
 251 /**
 252  * i40evf_fire_sw_int - Generate SW interrupt for specified vectors
 253  * @adapter: board private structure
 254  * @mask: bitmap of vectors to trigger
 255  **/
 256 static void i40evf_fire_sw_int(struct i40evf_adapter *adapter,
 257                                             u32 mask)
 258 {
 259         struct i40e_hw *hw = &adapter->hw;
 260         int i;
 261         uint32_t dyn_ctl;
 262
 263         if (mask & 1) {
 264                 dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTL01);
 265                 dyn_ctl |= I40E_VFINT_DYN_CTLN_SWINT_TRIG_MASK |
 266                            I40E_VFINT_DYN_CTLN_CLEARPBA_MASK;
 267                 wr32(hw, I40E_VFINT_DYN_CTL01, dyn_ctl);
 268         }
 269         for (i = 1; i < adapter->num_msix_vectors; i++) {
 270                 if (mask & (1 << i)) {
 271                         dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTLN1(i - 1));
 272                         dyn_ctl |= I40E_VFINT_DYN_CTLN_SWINT_TRIG_MASK |
 273                                    I40E_VFINT_DYN_CTLN_CLEARPBA_MASK;
 274                         wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), dyn_ctl);
 275                 }
 276         }
 277 }
 278
 279 /**
 280  * i40evf_irq_enable - Enable default interrupt generation settings
 281  * @adapter: board private structure
 282  **/
 283 void i40evf_irq_enable(struct i40evf_adapter *adapter, bool flush)
 284 {
 285         struct i40e_hw *hw = &adapter->hw;
 286
 287         i40evf_misc_irq_enable(adapter);
 288         i40evf_irq_enable_queues(adapter, ~0);
 289
 290         if (flush)
 291                 rd32(hw, I40E_VFGEN_RSTAT);
 292 }
 293
 294 /**
 295  * i40evf_msix_aq - Interrupt handler for vector 0
 296  * @irq: interrupt number
 297  * @data: pointer to netdev
 298  **/
 299 static irqreturn_t i40evf_msix_aq(int irq, void *data)
 300 {
 301         struct net_device *netdev = data;
 302         struct i40evf_adapter *adapter = netdev_priv(netdev);
 303         struct i40e_hw *hw = &adapter->hw;
 304         u32 val;
 305         u32 ena_mask;
 306
 307         /* handle non-queue interrupts */
 308         val = rd32(hw, I40E_VFINT_ICR01);
 309         ena_mask = rd32(hw, I40E_VFINT_ICR0_ENA1);
 310
 311
 312         val = rd32(hw, I40E_VFINT_DYN_CTL01);
 313         val = val | I40E_PFINT_DYN_CTL0_CLEARPBA_MASK;
 314         wr32(hw, I40E_VFINT_DYN_CTL01, val);
 315
 316         /* re-enable interrupt causes */
 317         wr32(hw, I40E_VFINT_ICR0_ENA1, ena_mask);
 318         wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK);
 319
 320         /* schedule work on the private workqueue */
 321         schedule_work(&adapter->adminq_task);
 322
 323         return IRQ_HANDLED;
 324 }
 325
 326 /**
 327  * i40evf_msix_clean_rings - MSIX mode Interrupt Handler
 328  * @irq: interrupt number
 329  * @data: pointer to a q_vector
 330  **/
 331 static irqreturn_t i40evf_msix_clean_rings(int irq, void *data)
 332 {
 333         struct i40e_q_vector *q_vector = data;
 334
 335         if (!q_vector->tx.ring && !q_vector->rx.ring)
 336                 return IRQ_HANDLED;
 337
 338         napi_schedule(&q_vector->napi);
 339
 340         return IRQ_HANDLED;
 341 }
 342
 343 /**
 344  * i40evf_map_vector_to_rxq - associate irqs with rx queues
 345  * @adapter: board private structure
 346  * @v_idx: interrupt number
 347  * @r_idx: queue number
 348  **/
 349 static void
 350 i40evf_map_vector_to_rxq(struct i40evf_adapter *adapter, int v_idx, int r_idx)
 351 {
 352         struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
 353         struct i40e_ring *rx_ring = adapter->rx_rings[r_idx];
 354
 355         rx_ring->q_vector = q_vector;
 356         rx_ring->next = q_vector->rx.ring;
 357         rx_ring->vsi = &adapter->vsi;
 358         q_vector->rx.ring = rx_ring;
 359         q_vector->rx.count++;
 360         q_vector->rx.latency_range = I40E_LOW_LATENCY;
 361 }
 362
 363 /**
 364  * i40evf_map_vector_to_txq - associate irqs with tx queues
 365  * @adapter: board private structure
 366  * @v_idx: interrupt number
 367  * @t_idx: queue number
 368  **/
 369 static void
 370 i40evf_map_vector_to_txq(struct i40evf_adapter *adapter, int v_idx, int t_idx)
 371 {
 372         struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
 373         struct i40e_ring *tx_ring = adapter->tx_rings[t_idx];
 374
 375         tx_ring->q_vector = q_vector;
 376         tx_ring->next = q_vector->tx.ring;
 377         tx_ring->vsi = &adapter->vsi;
 378         q_vector->tx.ring = tx_ring;
 379         q_vector->tx.count++;
 380         q_vector->tx.latency_range = I40E_LOW_LATENCY;
 381         q_vector->num_ringpairs++;
 382         q_vector->ring_mask |= (1 << t_idx);
 383 }
 384
 385 /**
 386  * i40evf_map_rings_to_vectors - Maps descriptor rings to vectors
 387  * @adapter: board private structure to initialize
 388  *
 389  * This function maps descriptor rings to the queue-specific vectors
 390  * we were allotted through the MSI-X enabling code.  Ideally, we'd have
 391  * one vector per ring/queue, but on a constrained vector budget, we
 392  * group the rings as "efficiently" as possible.  You would add new
 393  * mapping configurations in here.
 394  **/
 395 static int i40evf_map_rings_to_vectors(struct i40evf_adapter *adapter)
 396 {
 397         int q_vectors;
 398         int v_start = 0;
 399         int rxr_idx = 0, txr_idx = 0;
 400         int rxr_remaining = adapter->vsi_res->num_queue_pairs;
 401         int txr_remaining = adapter->vsi_res->num_queue_pairs;
 402         int i, j;
 403         int rqpv, tqpv;
 404         int err = 0;
 405
 406         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 407
 408         /* The ideal configuration...
 409          * We have enough vectors to map one per queue.
 410          */
 411         if (q_vectors == (rxr_remaining * 2)) {
 412                 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
 413                         i40evf_map_vector_to_rxq(adapter, v_start, rxr_idx);
 414
 415                 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
 416                         i40evf_map_vector_to_txq(adapter, v_start, txr_idx);
 417                 goto out;
 418         }
 419
 420         /* If we don't have enough vectors for a 1-to-1
 421          * mapping, we'll have to group them so there are
 422          * multiple queues per vector.
 423          * Re-adjusting *qpv takes care of the remainder.
 424          */
 425         for (i = v_start; i < q_vectors; i++) {
 426                 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
 427                 for (j = 0; j < rqpv; j++) {
 428                         i40evf_map_vector_to_rxq(adapter, i, rxr_idx);
 429                         rxr_idx++;
 430                         rxr_remaining--;
 431                 }
 432         }
 433         for (i = v_start; i < q_vectors; i++) {
 434                 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
 435                 for (j = 0; j < tqpv; j++) {
 436                         i40evf_map_vector_to_txq(adapter, i, txr_idx);
 437                         txr_idx++;
 438                         txr_remaining--;
 439                 }
 440         }
 441
 442 out:
 443         adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
 444
 445         return err;
 446 }
 447
 448 /**
 449  * i40evf_request_traffic_irqs - Initialize MSI-X interrupts
 450  * @adapter: board private structure
 451  *
 452  * Allocates MSI-X vectors for tx and rx handling, and requests
 453  * interrupts from the kernel.
 454  **/
 455 static int
 456 i40evf_request_traffic_irqs(struct i40evf_adapter *adapter, char *basename)
 457 {
 458         int vector, err, q_vectors;
 459         int rx_int_idx = 0, tx_int_idx = 0;
 460
 461         i40evf_irq_disable(adapter);
 462         /* Decrement for Other and TCP Timer vectors */
 463         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 464
 465         for (vector = 0; vector < q_vectors; vector++) {
 466                 struct i40e_q_vector *q_vector = adapter->q_vector[vector];
 467
 468                 if (q_vector->tx.ring && q_vector->rx.ring) {
 469                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 470                                  "i40evf-%s-%s-%d", basename,
 471                                  "TxRx", rx_int_idx++);
 472                         tx_int_idx++;
 473                 } else if (q_vector->rx.ring) {
 474                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 475                                  "i40evf-%s-%s-%d", basename,
 476                                  "rx", rx_int_idx++);
 477                 } else if (q_vector->tx.ring) {
 478                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 479                                  "i40evf-%s-%s-%d", basename,
 480                                  "tx", tx_int_idx++);
 481                 } else {
 482                         /* skip this unused q_vector */
 483                         continue;
 484                 }
 485                 err = request_irq(
 486                         adapter->msix_entries[vector + NONQ_VECS].vector,
 487                         i40evf_msix_clean_rings,
 488                         0,
 489                         q_vector->name,
 490                         q_vector);
 491                 if (err) {
 492                         dev_info(&adapter->pdev->dev,
 493                                  "%s: request_irq failed, error: %d\n",
 494                                 __func__, err);
 495                         goto free_queue_irqs;
 496                 }
 497                 /* assign the mask for this irq */
 498                 irq_set_affinity_hint(
 499                         adapter->msix_entries[vector + NONQ_VECS].vector,
 500                         q_vector->affinity_mask);
 501         }
 502
 503         return 0;
 504
 505 free_queue_irqs:
 506         while (vector) {
 507                 vector--;
 508                 irq_set_affinity_hint(
 509                         adapter->msix_entries[vector + NONQ_VECS].vector,
 510                         NULL);
 511                 free_irq(adapter->msix_entries[vector + NONQ_VECS].vector,
 512                          adapter->q_vector[vector]);
 513         }
 514         return err;
 515 }
 516
 517 /**
 518  * i40evf_request_misc_irq - Initialize MSI-X interrupts
 519  * @adapter: board private structure
 520  *
 521  * Allocates MSI-X vector 0 and requests interrupts from the kernel. This
 522  * vector is only for the admin queue, and stays active even when the netdev
 523  * is closed.
 524  **/
 525 static int i40evf_request_misc_irq(struct i40evf_adapter *adapter)
 526 {
 527         struct net_device *netdev = adapter->netdev;
 528         int err;
 529
 530         snprintf(adapter->misc_vector_name,
 531                  sizeof(adapter->misc_vector_name) - 1, "i40evf:mbx");
 532         err = request_irq(adapter->msix_entries[0].vector,
 533                           &i40evf_msix_aq, 0,
 534                           adapter->misc_vector_name, netdev);
 535         if (err) {
 536                 dev_err(&adapter->pdev->dev,
 537                         "request_irq for %s failed: %d\n",
 538                         adapter->misc_vector_name, err);
 539                 free_irq(adapter->msix_entries[0].vector, netdev);
 540         }
 541         return err;
 542 }
 543
 544 /**
 545  * i40evf_free_traffic_irqs - Free MSI-X interrupts
 546  * @adapter: board private structure
 547  *
 548  * Frees all MSI-X vectors other than 0.
 549  **/
 550 static void i40evf_free_traffic_irqs(struct i40evf_adapter *adapter)
 551 {
 552         int i;
 553         int q_vectors;
 554         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 555
 556         for (i = 0; i < q_vectors; i++) {
 557                 irq_set_affinity_hint(adapter->msix_entries[i+1].vector,
 558                                       NULL);
 559                 free_irq(adapter->msix_entries[i+1].vector,
 560                          adapter->q_vector[i]);
 561         }
 562 }
 563
 564 /**
 565  * i40evf_free_misc_irq - Free MSI-X miscellaneous vector
 566  * @adapter: board private structure
 567  *
 568  * Frees MSI-X vector 0.
 569  **/
 570 static void i40evf_free_misc_irq(struct i40evf_adapter *adapter)
 571 {
 572         struct net_device *netdev = adapter->netdev;
 573
 574         free_irq(adapter->msix_entries[0].vector, netdev);
 575 }
 576
 577 /**
 578  * i40evf_configure_tx - Configure Transmit Unit after Reset
 579  * @adapter: board private structure
 580  *
 581  * Configure the Tx unit of the MAC after a reset.
 582  **/
 583 static void i40evf_configure_tx(struct i40evf_adapter *adapter)
 584 {
 585         struct i40e_hw *hw = &adapter->hw;
 586         int i;
 587         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
 588                 adapter->tx_rings[i]->tail = hw->hw_addr + I40E_QTX_TAIL1(i);
 589 }
 590
 591 /**
 592  * i40evf_configure_rx - Configure Receive Unit after Reset
 593  * @adapter: board private structure
 594  *
 595  * Configure the Rx unit of the MAC after a reset.
 596  **/
 597 static void i40evf_configure_rx(struct i40evf_adapter *adapter)
 598 {
 599         struct i40e_hw *hw = &adapter->hw;
 600         struct net_device *netdev = adapter->netdev;
 601         int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
 602         int i;
 603         int rx_buf_len;
 604
 605
 606         adapter->flags &= ~I40EVF_FLAG_RX_PS_CAPABLE;
 607         adapter->flags |= I40EVF_FLAG_RX_1BUF_CAPABLE;
 608
 609         /* Decide whether to use packet split mode or not */
 610         if (netdev->mtu > ETH_DATA_LEN) {
 611                 if (adapter->flags & I40EVF_FLAG_RX_PS_CAPABLE)
 612                         adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
 613                 else
 614                         adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
 615         } else {
 616                 if (adapter->flags & I40EVF_FLAG_RX_1BUF_CAPABLE)
 617                         adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
 618                 else
 619                         adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
 620         }
 621
 622         /* Set the RX buffer length according to the mode */
 623         if (adapter->flags & I40EVF_FLAG_RX_PS_ENABLED) {
 624                 rx_buf_len = I40E_RX_HDR_SIZE;
 625         } else {
 626                 if (netdev->mtu <= ETH_DATA_LEN)
 627                         rx_buf_len = I40EVF_RXBUFFER_2048;
 628                 else
 629                         rx_buf_len = ALIGN(max_frame, 1024);
 630         }
 631
 632         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
 633                 adapter->rx_rings[i]->tail = hw->hw_addr + I40E_QRX_TAIL1(i);
 634                 adapter->rx_rings[i]->rx_buf_len = rx_buf_len;
 635         }
 636 }
 637
 638 /**
 639  * i40evf_find_vlan - Search filter list for specific vlan filter
 640  * @adapter: board private structure
 641  * @vlan: vlan tag
 642  *
 643  * Returns ptr to the filter object or NULL
 644  **/
 645 static struct
 646 i40evf_vlan_filter *i40evf_find_vlan(struct i40evf_adapter *adapter, u16 vlan)
 647 {
 648         struct i40evf_vlan_filter *f;
 649
 650         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
 651                 if (vlan == f->vlan)
 652                         return f;
 653         }
 654         return NULL;
 655 }
 656
 657 /**
 658  * i40evf_add_vlan - Add a vlan filter to the list
 659  * @adapter: board private structure
 660  * @vlan: VLAN tag
 661  *
 662  * Returns ptr to the filter object or NULL when no memory available.
 663  **/
 664 static struct
 665 i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan)
 666 {
 667         struct i40evf_vlan_filter *f;
 668
 669         f = i40evf_find_vlan(adapter, vlan);
 670         if (NULL == f) {
 671                 f = kzalloc(sizeof(*f), GFP_ATOMIC);
 672                 if (NULL == f)
 673                         return NULL;
 674
 675                 f->vlan = vlan;
 676
 677                 INIT_LIST_HEAD(&f->list);
 678                 list_add(&f->list, &adapter->vlan_filter_list);
 679                 f->add = true;
 680                 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
 681         }
 682
 683         return f;
 684 }
 685
 686 /**
 687  * i40evf_del_vlan - Remove a vlan filter from the list
 688  * @adapter: board private structure
 689  * @vlan: VLAN tag
 690  **/
 691 static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan)
 692 {
 693         struct i40evf_vlan_filter *f;
 694
 695         f = i40evf_find_vlan(adapter, vlan);
 696         if (f) {
 697                 f->remove = true;
 698                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
 699         }
 700 }
 701
 702 /**
 703  * i40evf_vlan_rx_add_vid - Add a VLAN filter to a device
 704  * @netdev: network device struct
 705  * @vid: VLAN tag
 706  **/
 707 static int i40evf_vlan_rx_add_vid(struct net_device *netdev,
 708                          __always_unused __be16 proto, u16 vid)
 709 {
 710         struct i40evf_adapter *adapter = netdev_priv(netdev);
 711
 712         if (i40evf_add_vlan(adapter, vid) == NULL)
 713                 return -ENOMEM;
 714         return 0;
 715 }
 716
 717 /**
 718  * i40evf_vlan_rx_kill_vid - Remove a VLAN filter from a device
 719  * @netdev: network device struct
 720  * @vid: VLAN tag
 721  **/
 722 static int i40evf_vlan_rx_kill_vid(struct net_device *netdev,
 723                           __always_unused __be16 proto, u16 vid)
 724 {
 725         struct i40evf_adapter *adapter = netdev_priv(netdev);
 726
 727         i40evf_del_vlan(adapter, vid);
 728         return 0;
 729 }
 730
 731 /**
 732  * i40evf_find_filter - Search filter list for specific mac filter
 733  * @adapter: board private structure
 734  * @macaddr: the MAC address
 735  *
 736  * Returns ptr to the filter object or NULL
 737  **/
 738 static struct
 739 i40evf_mac_filter *i40evf_find_filter(struct i40evf_adapter *adapter,
 740                                       u8 *macaddr)
 741 {
 742         struct i40evf_mac_filter *f;
 743
 744         if (!macaddr)
 745                 return NULL;
 746
 747         list_for_each_entry(f, &adapter->mac_filter_list, list) {
 748                 if (ether_addr_equal(macaddr, f->macaddr))
 749                         return f;
 750         }
 751         return NULL;
 752 }
 753
 754 /**
 755  * i40e_add_filter - Add a mac filter to the filter list
 756  * @adapter: board private structure
 757  * @macaddr: the MAC address
 758  *
 759  * Returns ptr to the filter object or NULL when no memory available.
 760  **/
 761 static struct
 762 i40evf_mac_filter *i40evf_add_filter(struct i40evf_adapter *adapter,
 763                                      u8 *macaddr)
 764 {
 765         struct i40evf_mac_filter *f;
 766
 767         if (!macaddr)
 768                 return NULL;
 769
 770         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 771                                 &adapter->crit_section))
 772                 udelay(1);
 773
 774         f = i40evf_find_filter(adapter, macaddr);
 775         if (NULL == f) {
 776                 f = kzalloc(sizeof(*f), GFP_ATOMIC);
 777                 if (NULL == f) {
 778                         clear_bit(__I40EVF_IN_CRITICAL_TASK,
 779                                   &adapter->crit_section);
 780                         return NULL;
 781                 }
 782
 783                 ether_addr_copy(f->macaddr, macaddr);
 784
 785                 list_add(&f->list, &adapter->mac_filter_list);
 786                 f->add = true;
 787                 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
 788         }
 789
 790         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 791         return f;
 792 }
 793
 794 /**
 795  * i40evf_set_mac - NDO callback to set port mac address
 796  * @netdev: network interface device structure
 797  * @p: pointer to an address structure
 798  *
 799  * Returns 0 on success, negative on failure
 800  **/
 801 static int i40evf_set_mac(struct net_device *netdev, void *p)
 802 {
 803         struct i40evf_adapter *adapter = netdev_priv(netdev);
 804         struct i40e_hw *hw = &adapter->hw;
 805         struct i40evf_mac_filter *f;
 806         struct sockaddr *addr = p;
 807
 808         if (!is_valid_ether_addr(addr->sa_data))
 809                 return -EADDRNOTAVAIL;
 810
 811         if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
 812                 return 0;
 813
 814         f = i40evf_add_filter(adapter, addr->sa_data);
 815         if (f) {
 816                 ether_addr_copy(hw->mac.addr, addr->sa_data);
 817                 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
 818         }
 819
 820         return (f == NULL) ? -ENOMEM : 0;
 821 }
 822
 823 /**
 824  * i40evf_set_rx_mode - NDO callback to set the netdev filters
 825  * @netdev: network interface device structure
 826  **/
 827 static void i40evf_set_rx_mode(struct net_device *netdev)
 828 {
 829         struct i40evf_adapter *adapter = netdev_priv(netdev);
 830         struct i40evf_mac_filter *f, *ftmp;
 831         struct netdev_hw_addr *uca;
 832         struct netdev_hw_addr *mca;
 833
 834         /* add addr if not already in the filter list */
 835         netdev_for_each_uc_addr(uca, netdev) {
 836                 i40evf_add_filter(adapter, uca->addr);
 837         }
 838         netdev_for_each_mc_addr(mca, netdev) {
 839                 i40evf_add_filter(adapter, mca->addr);
 840         }
 841
 842         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 843                                 &adapter->crit_section))
 844                 udelay(1);
 845         /* remove filter if not in netdev list */
 846         list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
 847                 bool found = false;
 848
 849                 if (is_multicast_ether_addr(f->macaddr)) {
 850                         netdev_for_each_mc_addr(mca, netdev) {
 851                                 if (ether_addr_equal(mca->addr, f->macaddr)) {
 852                                         found = true;
 853                                         break;
 854                                 }
 855                         }
 856                 } else {
 857                         netdev_for_each_uc_addr(uca, netdev) {
 858                                 if (ether_addr_equal(uca->addr, f->macaddr)) {
 859                                         found = true;
 860                                         break;
 861                                 }
 862                         }
 863                 }
 864                 if (found) {
 865                         f->remove = true;
 866                         adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
 867                 }
 868         }
 869         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 870 }
 871
 872 /**
 873  * i40evf_napi_enable_all - enable NAPI on all queue vectors
 874  * @adapter: board private structure
 875  **/
 876 static void i40evf_napi_enable_all(struct i40evf_adapter *adapter)
 877 {
 878         int q_idx;
 879         struct i40e_q_vector *q_vector;
 880         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 881
 882         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
 883                 struct napi_struct *napi;
 884                 q_vector = adapter->q_vector[q_idx];
 885                 napi = &q_vector->napi;
 886                 napi_enable(napi);
 887         }
 888 }
 889
 890 /**
 891  * i40evf_napi_disable_all - disable NAPI on all queue vectors
 892  * @adapter: board private structure
 893  **/
 894 static void i40evf_napi_disable_all(struct i40evf_adapter *adapter)
 895 {
 896         int q_idx;
 897         struct i40e_q_vector *q_vector;
 898         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 899
 900         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
 901                 q_vector = adapter->q_vector[q_idx];
 902                 napi_disable(&q_vector->napi);
 903         }
 904 }
 905
 906 /**
 907  * i40evf_configure - set up transmit and receive data structures
 908  * @adapter: board private structure
 909  **/
 910 static void i40evf_configure(struct i40evf_adapter *adapter)
 911 {
 912         struct net_device *netdev = adapter->netdev;
 913         int i;
 914
 915         i40evf_set_rx_mode(netdev);
 916
 917         i40evf_configure_tx(adapter);
 918         i40evf_configure_rx(adapter);
 919         adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
 920
 921         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
 922                 struct i40e_ring *ring = adapter->rx_rings[i];
 923                 i40evf_alloc_rx_buffers(ring, ring->count);
 924                 ring->next_to_use = ring->count - 1;
 925                 writel(ring->next_to_use, ring->tail);
 926         }
 927 }
 928
 929 /**
 930  * i40evf_up_complete - Finish the last steps of bringing up a connection
 931  * @adapter: board private structure
 932  **/
 933 static int i40evf_up_complete(struct i40evf_adapter *adapter)
 934 {
 935         adapter->state = __I40EVF_RUNNING;
 936         clear_bit(__I40E_DOWN, &adapter->vsi.state);
 937
 938         i40evf_napi_enable_all(adapter);
 939
 940         adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES;
 941         mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
 942         return 0;
 943 }
 944
 945 /**
 946  * i40evf_clean_all_rx_rings - Free Rx Buffers for all queues
 947  * @adapter: board private structure
 948  **/
 949 static void i40evf_clean_all_rx_rings(struct i40evf_adapter *adapter)
 950 {
 951         int i;
 952
 953         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
 954                 i40evf_clean_rx_ring(adapter->rx_rings[i]);
 955 }
 956
 957 /**
 958  * i40evf_clean_all_tx_rings - Free Tx Buffers for all queues
 959  * @adapter: board private structure
 960  **/
 961 static void i40evf_clean_all_tx_rings(struct i40evf_adapter *adapter)
 962 {
 963         int i;
 964
 965         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
 966                 i40evf_clean_tx_ring(adapter->tx_rings[i]);
 967 }
 968
 969 /**
 970  * i40e_down - Shutdown the connection processing
 971  * @adapter: board private structure
 972  **/
 973 void i40evf_down(struct i40evf_adapter *adapter)
 974 {
 975         struct net_device *netdev = adapter->netdev;
 976         struct i40evf_mac_filter *f;
 977
 978         if (adapter->state == __I40EVF_DOWN)
 979                 return;
 980
 981         /* remove all MAC filters */
 982         list_for_each_entry(f, &adapter->mac_filter_list, list) {
 983                 f->remove = true;
 984         }
 985         /* remove all VLAN filters */
 986         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
 987                 f->remove = true;
 988         }
 989         if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) &&
 990             adapter->state != __I40EVF_RESETTING) {
 991                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
 992                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
 993                 /* disable receives */
 994                 adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
 995                 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
 996                 msleep(20);
 997         }
 998         netif_tx_disable(netdev);
 999
1000         netif_tx_stop_all_queues(netdev);
1001
1002         i40evf_irq_disable(adapter);
1003
1004         i40evf_napi_disable_all(adapter);
1005
1006         netif_carrier_off(netdev);
1007
1008         i40evf_clean_all_tx_rings(adapter);
1009         i40evf_clean_all_rx_rings(adapter);
1010 }
1011
1012 /**
1013  * i40evf_acquire_msix_vectors - Setup the MSIX capability
1014  * @adapter: board private structure
1015  * @vectors: number of vectors to request
1016  *
1017  * Work with the OS to set up the MSIX vectors needed.
1018  *
1019  * Returns 0 on success, negative on failure
1020  **/
1021 static int
1022 i40evf_acquire_msix_vectors(struct i40evf_adapter *adapter, int vectors)
1023 {
1024         int err, vector_threshold;
1025
1026         /* We'll want at least 3 (vector_threshold):
1027          * 0) Other (Admin Queue and link, mostly)
1028          * 1) TxQ[0] Cleanup
1029          * 2) RxQ[0] Cleanup
1030          */
1031         vector_threshold = MIN_MSIX_COUNT;
1032
1033         /* The more we get, the more we will assign to Tx/Rx Cleanup
1034          * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1035          * Right now, we simply care about how many we'll get; we'll
1036          * set them up later while requesting irq's.
1037          */
1038         err = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
1039                                     vector_threshold, vectors);
1040         if (err < 0) {
1041                 dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts\n");
1042                 kfree(adapter->msix_entries);
1043                 adapter->msix_entries = NULL;
1044                 return err;
1045         }
1046
1047         /* Adjust for only the vectors we'll use, which is minimum
1048          * of max_msix_q_vectors + NONQ_VECS, or the number of
1049          * vectors we were allocated.
1050          */
1051         adapter->num_msix_vectors = err;
1052         return 0;
1053 }
1054
1055 /**
1056  * i40evf_free_queues - Free memory for all rings
1057  * @adapter: board private structure to initialize
1058  *
1059  * Free all of the memory associated with queue pairs.
1060  **/
1061 static void i40evf_free_queues(struct i40evf_adapter *adapter)
1062 {
1063         int i;
1064
1065         if (!adapter->vsi_res)
1066                 return;
1067         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1068                 if (adapter->tx_rings[i])
1069                         kfree_rcu(adapter->tx_rings[i], rcu);
1070                 adapter->tx_rings[i] = NULL;
1071                 adapter->rx_rings[i] = NULL;
1072         }
1073 }
1074
1075 /**
1076  * i40evf_alloc_queues - Allocate memory for all rings
1077  * @adapter: board private structure to initialize
1078  *
1079  * We allocate one ring per queue at run-time since we don't know the
1080  * number of queues at compile-time.  The polling_netdev array is
1081  * intended for Multiqueue, but should work fine with a single queue.
1082  **/
1083 static int i40evf_alloc_queues(struct i40evf_adapter *adapter)
1084 {
1085         int i;
1086
1087         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1088                 struct i40e_ring *tx_ring;
1089                 struct i40e_ring *rx_ring;
1090
1091                 tx_ring = kzalloc(sizeof(struct i40e_ring) * 2, GFP_KERNEL);
1092                 if (!tx_ring)
1093                         goto err_out;
1094
1095                 tx_ring->queue_index = i;
1096                 tx_ring->netdev = adapter->netdev;
1097                 tx_ring->dev = &adapter->pdev->dev;
1098                 tx_ring->count = adapter->tx_desc_count;
1099                 adapter->tx_rings[i] = tx_ring;
1100
1101                 rx_ring = &tx_ring[1];
1102                 rx_ring->queue_index = i;
1103                 rx_ring->netdev = adapter->netdev;
1104                 rx_ring->dev = &adapter->pdev->dev;
1105                 rx_ring->count = adapter->rx_desc_count;
1106                 adapter->rx_rings[i] = rx_ring;
1107         }
1108
1109         return 0;
1110
1111 err_out:
1112         i40evf_free_queues(adapter);
1113         return -ENOMEM;
1114 }
1115
1116 /**
1117  * i40evf_set_interrupt_capability - set MSI-X or FAIL if not supported
1118  * @adapter: board private structure to initialize
1119  *
1120  * Attempt to configure the interrupts using the best available
1121  * capabilities of the hardware and the kernel.
1122  **/
1123 static int i40evf_set_interrupt_capability(struct i40evf_adapter *adapter)
1124 {
1125         int vector, v_budget;
1126         int pairs = 0;
1127         int err = 0;
1128
1129         if (!adapter->vsi_res) {
1130                 err = -EIO;
1131                 goto out;
1132         }
1133         pairs = adapter->vsi_res->num_queue_pairs;
1134
1135         /* It's easy to be greedy for MSI-X vectors, but it really
1136          * doesn't do us much good if we have a lot more vectors
1137          * than CPU's.  So let's be conservative and only ask for
1138          * (roughly) twice the number of vectors as there are CPU's.
1139          */
1140         v_budget = min_t(int, pairs, (int)(num_online_cpus() * 2)) + NONQ_VECS;
1141         v_budget = min_t(int, v_budget, (int)adapter->vf_res->max_vectors);
1142
1143         adapter->msix_entries = kcalloc(v_budget,
1144                                         sizeof(struct msix_entry), GFP_KERNEL);
1145         if (!adapter->msix_entries) {
1146                 err = -ENOMEM;
1147                 goto out;
1148         }
1149
1150         for (vector = 0; vector < v_budget; vector++)
1151                 adapter->msix_entries[vector].entry = vector;
1152
1153         i40evf_acquire_msix_vectors(adapter, v_budget);
1154
1155 out:
1156         adapter->netdev->real_num_tx_queues = pairs;
1157         return err;
1158 }
1159
1160 /**
1161  * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors
1162  * @adapter: board private structure to initialize
1163  *
1164  * We allocate one q_vector per queue interrupt.  If allocation fails we
1165  * return -ENOMEM.
1166  **/
1167 static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
1168 {
1169         int q_idx, num_q_vectors;
1170         struct i40e_q_vector *q_vector;
1171
1172         num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1173
1174         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1175                 q_vector = kzalloc(sizeof(struct i40e_q_vector), GFP_KERNEL);
1176                 if (!q_vector)
1177                         goto err_out;
1178                 q_vector->adapter = adapter;
1179                 q_vector->vsi = &adapter->vsi;
1180                 q_vector->v_idx = q_idx;
1181                 netif_napi_add(adapter->netdev, &q_vector->napi,
1182                                        i40evf_napi_poll, NAPI_POLL_WEIGHT);
1183                 adapter->q_vector[q_idx] = q_vector;
1184         }
1185
1186         return 0;
1187
1188 err_out:
1189         while (q_idx) {
1190                 q_idx--;
1191                 q_vector = adapter->q_vector[q_idx];
1192                 netif_napi_del(&q_vector->napi);
1193                 kfree(q_vector);
1194                 adapter->q_vector[q_idx] = NULL;
1195         }
1196         return -ENOMEM;
1197 }
1198
1199 /**
1200  * i40evf_free_q_vectors - Free memory allocated for interrupt vectors
1201  * @adapter: board private structure to initialize
1202  *
1203  * This function frees the memory allocated to the q_vectors.  In addition if
1204  * NAPI is enabled it will delete any references to the NAPI struct prior
1205  * to freeing the q_vector.
1206  **/
1207 static void i40evf_free_q_vectors(struct i40evf_adapter *adapter)
1208 {
1209         int q_idx, num_q_vectors;
1210         int napi_vectors;
1211
1212         num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1213         napi_vectors = adapter->vsi_res->num_queue_pairs;
1214
1215         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1216                 struct i40e_q_vector *q_vector = adapter->q_vector[q_idx];
1217
1218                 adapter->q_vector[q_idx] = NULL;
1219                 if (q_idx < napi_vectors)
1220                         netif_napi_del(&q_vector->napi);
1221                 kfree(q_vector);
1222         }
1223 }
1224
1225 /**
1226  * i40evf_reset_interrupt_capability - Reset MSIX setup
1227  * @adapter: board private structure
1228  *
1229  **/
1230 void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
1231 {
1232         pci_disable_msix(adapter->pdev);
1233         kfree(adapter->msix_entries);
1234         adapter->msix_entries = NULL;
1235 }
1236
1237 /**
1238  * i40evf_init_interrupt_scheme - Determine if MSIX is supported and init
1239  * @adapter: board private structure to initialize
1240  *
1241  **/
1242 int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter)
1243 {
1244         int err;
1245
1246         err = i40evf_set_interrupt_capability(adapter);
1247         if (err) {
1248                 dev_err(&adapter->pdev->dev,
1249                         "Unable to setup interrupt capabilities\n");
1250                 goto err_set_interrupt;
1251         }
1252
1253         err = i40evf_alloc_q_vectors(adapter);
1254         if (err) {
1255                 dev_err(&adapter->pdev->dev,
1256                         "Unable to allocate memory for queue vectors\n");
1257                 goto err_alloc_q_vectors;
1258         }
1259
1260         err = i40evf_alloc_queues(adapter);
1261         if (err) {
1262                 dev_err(&adapter->pdev->dev,
1263                         "Unable to allocate memory for queues\n");
1264                 goto err_alloc_queues;
1265         }
1266
1267         dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
1268                 (adapter->vsi_res->num_queue_pairs > 1) ? "Enabled" :
1269                 "Disabled", adapter->vsi_res->num_queue_pairs);
1270
1271         return 0;
1272 err_alloc_queues:
1273         i40evf_free_q_vectors(adapter);
1274 err_alloc_q_vectors:
1275         i40evf_reset_interrupt_capability(adapter);
1276 err_set_interrupt:
1277         return err;
1278 }
1279
1280 /**
1281  * i40evf_watchdog_timer - Periodic call-back timer
1282  * @data: pointer to adapter disguised as unsigned long
1283  **/
1284 static void i40evf_watchdog_timer(unsigned long data)
1285 {
1286         struct i40evf_adapter *adapter = (struct i40evf_adapter *)data;
1287         schedule_work(&adapter->watchdog_task);
1288         /* timer will be rescheduled in watchdog task */
1289 }
1290
1291 /**
1292  * i40evf_watchdog_task - Periodic call-back task
1293  * @work: pointer to work_struct
1294  **/
1295 static void i40evf_watchdog_task(struct work_struct *work)
1296 {
1297         struct i40evf_adapter *adapter = container_of(work,
1298                                           struct i40evf_adapter,
1299                                           watchdog_task);
1300         struct i40e_hw *hw = &adapter->hw;
1301         uint32_t rstat_val;
1302
1303         if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
1304                 goto restart_watchdog;
1305
1306         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1307                 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1308                             I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1309                 if ((rstat_val == I40E_VFR_VFACTIVE) ||
1310                     (rstat_val == I40E_VFR_COMPLETED)) {
1311                         /* A chance for redemption! */
1312                         dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
1313                         adapter->state = __I40EVF_STARTUP;
1314                         adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1315                         schedule_delayed_work(&adapter->init_task, 10);
1316                         clear_bit(__I40EVF_IN_CRITICAL_TASK,
1317                                   &adapter->crit_section);
1318                         /* Don't reschedule the watchdog, since we've restarted
1319                          * the init task. When init_task contacts the PF and
1320                          * gets everything set up again, it'll restart the
1321                          * watchdog for us. Down, boy. Sit. Stay. Woof.
1322                          */
1323                         return;
1324                 }
1325                 adapter->aq_pending = 0;
1326                 adapter->aq_required = 0;
1327                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1328                 goto watchdog_done;
1329         }
1330
1331         if ((adapter->state < __I40EVF_DOWN) ||
1332             (adapter->flags & I40EVF_FLAG_RESET_PENDING))
1333                 goto watchdog_done;
1334
1335         /* check for reset */
1336         rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1337                             I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1338         if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) &&
1339             (rstat_val != I40E_VFR_VFACTIVE) &&
1340             (rstat_val != I40E_VFR_COMPLETED)) {
1341                 adapter->state = __I40EVF_RESETTING;
1342                 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1343                 dev_err(&adapter->pdev->dev, "Hardware reset detected\n");
1344                 schedule_work(&adapter->reset_task);
1345                 adapter->aq_pending = 0;
1346                 adapter->aq_required = 0;
1347                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1348                 goto watchdog_done;
1349         }
1350
1351         /* Process admin queue tasks. After init, everything gets done
1352          * here so we don't race on the admin queue.
1353          */
1354         if (adapter->aq_pending)
1355                 goto watchdog_done;
1356
1357         if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
1358                 i40evf_map_queues(adapter);
1359                 goto watchdog_done;
1360         }
1361
1362         if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
1363                 i40evf_add_ether_addrs(adapter);
1364                 goto watchdog_done;
1365         }
1366
1367         if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
1368                 i40evf_add_vlans(adapter);
1369                 goto watchdog_done;
1370         }
1371
1372         if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
1373                 i40evf_del_ether_addrs(adapter);
1374                 goto watchdog_done;
1375         }
1376
1377         if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
1378                 i40evf_del_vlans(adapter);
1379                 goto watchdog_done;
1380         }
1381
1382         if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
1383                 i40evf_disable_queues(adapter);
1384                 goto watchdog_done;
1385         }
1386
1387         if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
1388                 i40evf_configure_queues(adapter);
1389                 goto watchdog_done;
1390         }
1391
1392         if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
1393                 i40evf_enable_queues(adapter);
1394                 goto watchdog_done;
1395         }
1396
1397         if (adapter->state == __I40EVF_RUNNING)
1398                 i40evf_request_stats(adapter);
1399
1400         i40evf_irq_enable(adapter, true);
1401         i40evf_fire_sw_int(adapter, 0xFF);
1402
1403 watchdog_done:
1404         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1405 restart_watchdog:
1406         if (adapter->state == __I40EVF_REMOVE)
1407                 return;
1408         if (adapter->aq_required)
1409                 mod_timer(&adapter->watchdog_timer,
1410                           jiffies + msecs_to_jiffies(20));
1411         else
1412                 mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
1413         schedule_work(&adapter->adminq_task);
1414 }
1415
1416 /**
1417  * next_queue - increment to next available tx queue
1418  * @adapter: board private structure
1419  * @j: queue counter
1420  *
1421  * Helper function for RSS programming to increment through available
1422  * queus. Returns the next queue value.
1423  **/
1424 static int next_queue(struct i40evf_adapter *adapter, int j)
1425 {
1426         j += 1;
1427
1428         return j >= adapter->vsi_res->num_queue_pairs ? 0 : j;
1429 }
1430
1431 /**
1432  * i40evf_configure_rss - Prepare for RSS if used
1433  * @adapter: board private structure
1434  **/
1435 static void i40evf_configure_rss(struct i40evf_adapter *adapter)
1436 {
1437         struct i40e_hw *hw = &adapter->hw;
1438         u32 lut = 0;
1439         int i, j;
1440         u64 hena;
1441
1442         /* Set of random keys generated using kernel random number generator */
1443         static const u32 seed[I40E_VFQF_HKEY_MAX_INDEX + 1] = {
1444                         0x794221b4, 0xbca0c5ab, 0x6cd5ebd9, 0x1ada6127,
1445                         0x983b3aa1, 0x1c4e71eb, 0x7f6328b2, 0xfcdc0da0,
1446                         0xc135cafa, 0x7a6f7e2d, 0xe7102d28, 0x163cd12e,
1447                         0x4954b126 };
1448
1449         /* Hash type is configured by the PF - we just supply the key */
1450
1451         /* Fill out hash function seed */
1452         for (i = 0; i <= I40E_VFQF_HKEY_MAX_INDEX; i++)
1453                 wr32(hw, I40E_VFQF_HKEY(i), seed[i]);
1454
1455         /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
1456         hena = I40E_DEFAULT_RSS_HENA;
1457         wr32(hw, I40E_VFQF_HENA(0), (u32)hena);
1458         wr32(hw, I40E_VFQF_HENA(1), (u32)(hena >> 32));
1459
1460         /* Populate the LUT with max no. of queues in round robin fashion */
1461         j = adapter->vsi_res->num_queue_pairs;
1462         for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++) {
1463                 j = next_queue(adapter, j);
1464                 lut = j;
1465                 j = next_queue(adapter, j);
1466                 lut |= j << 8;
1467                 j = next_queue(adapter, j);
1468                 lut |= j << 16;
1469                 j = next_queue(adapter, j);
1470                 lut |= j << 24;
1471                 wr32(hw, I40E_VFQF_HLUT(i), lut);
1472         }
1473         i40e_flush(hw);
1474 }
1475
1476 #define I40EVF_RESET_WAIT_MS 100
1477 #define I40EVF_RESET_WAIT_COUNT 200
1478 /**
1479  * i40evf_reset_task - Call-back task to handle hardware reset
1480  * @work: pointer to work_struct
1481  *
1482  * During reset we need to shut down and reinitialize the admin queue
1483  * before we can use it to communicate with the PF again. We also clear
1484  * and reinit the rings because that context is lost as well.
1485  **/
1486 static void i40evf_reset_task(struct work_struct *work)
1487 {
1488         struct i40evf_adapter *adapter = container_of(work,
1489                                                       struct i40evf_adapter,
1490                                                       reset_task);
1491         struct i40e_hw *hw = &adapter->hw;
1492         int i = 0, err;
1493         uint32_t rstat_val;
1494
1495         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1496                                 &adapter->crit_section))
1497                 udelay(500);
1498
1499         if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) {
1500                 dev_info(&adapter->pdev->dev, "Requesting reset from PF\n");
1501                 i40evf_request_reset(adapter);
1502         }
1503
1504         /* poll until we see the reset actually happen */
1505         for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1506                 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1507                             I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1508                 if ((rstat_val != I40E_VFR_VFACTIVE) &&
1509                     (rstat_val != I40E_VFR_COMPLETED))
1510                         break;
1511                 else
1512                         msleep(I40EVF_RESET_WAIT_MS);
1513         }
1514         if (i == I40EVF_RESET_WAIT_COUNT) {
1515                 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1516                 goto continue_reset; /* act like the reset happened */
1517         }
1518
1519         /* wait until the reset is complete and the PF is responding to us */
1520         for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1521                 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1522                             I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1523                 if ((rstat_val == I40E_VFR_VFACTIVE) ||
1524                     (rstat_val == I40E_VFR_COMPLETED))
1525                         break;
1526                 else
1527                         msleep(I40EVF_RESET_WAIT_MS);
1528         }
1529         if (i == I40EVF_RESET_WAIT_COUNT) {
1530                 /* reset never finished */
1531                 dev_err(&adapter->pdev->dev, "Reset never finished (%x)\n",
1532                         rstat_val);
1533                 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
1534
1535                 if (netif_running(adapter->netdev)) {
1536                         set_bit(__I40E_DOWN, &adapter->vsi.state);
1537                         i40evf_down(adapter);
1538                         i40evf_free_traffic_irqs(adapter);
1539                         i40evf_free_all_tx_resources(adapter);
1540                         i40evf_free_all_rx_resources(adapter);
1541                 }
1542                 i40evf_free_misc_irq(adapter);
1543                 i40evf_reset_interrupt_capability(adapter);
1544                 i40evf_free_queues(adapter);
1545                 i40evf_free_q_vectors(adapter);
1546                 kfree(adapter->vf_res);
1547                 i40evf_shutdown_adminq(hw);
1548                 adapter->netdev->flags &= ~IFF_UP;
1549                 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1550                 return; /* Do not attempt to reinit. It's dead, Jim. */
1551         }
1552
1553 continue_reset:
1554         adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1555
1556         i40evf_down(adapter);
1557         adapter->state = __I40EVF_RESETTING;
1558
1559         /* kill and reinit the admin queue */
1560         if (i40evf_shutdown_adminq(hw))
1561                 dev_warn(&adapter->pdev->dev,
1562                         "%s: Failed to destroy the Admin Queue resources\n",
1563                         __func__);
1564         err = i40evf_init_adminq(hw);
1565         if (err)
1566                 dev_info(&adapter->pdev->dev, "%s: init_adminq failed: %d\n",
1567                         __func__, err);
1568
1569         adapter->aq_pending = 0;
1570         adapter->aq_required = 0;
1571         i40evf_map_queues(adapter);
1572         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1573
1574         mod_timer(&adapter->watchdog_timer, jiffies + 2);
1575
1576         if (netif_running(adapter->netdev)) {
1577                 /* allocate transmit descriptors */
1578                 err = i40evf_setup_all_tx_resources(adapter);
1579                 if (err)
1580                         goto reset_err;
1581
1582                 /* allocate receive descriptors */
1583                 err = i40evf_setup_all_rx_resources(adapter);
1584                 if (err)
1585                         goto reset_err;
1586
1587                 i40evf_configure(adapter);
1588
1589                 err = i40evf_up_complete(adapter);
1590                 if (err)
1591                         goto reset_err;
1592
1593                 i40evf_irq_enable(adapter, true);
1594         }
1595         return;
1596 reset_err:
1597         dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
1598         i40evf_close(adapter->netdev);
1599 }
1600
1601 /**
1602  * i40evf_adminq_task - worker thread to clean the admin queue
1603  * @work: pointer to work_struct containing our data
1604  **/
1605 static void i40evf_adminq_task(struct work_struct *work)
1606 {
1607         struct i40evf_adapter *adapter =
1608                 container_of(work, struct i40evf_adapter, adminq_task);
1609         struct i40e_hw *hw = &adapter->hw;
1610         struct i40e_arq_event_info event;
1611         struct i40e_virtchnl_msg *v_msg;
1612         i40e_status ret;
1613         u32 val, oldval;
1614         u16 pending;
1615
1616         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
1617                 return;
1618
1619         event.msg_size = I40EVF_MAX_AQ_BUF_SIZE;
1620         event.msg_buf = kzalloc(event.msg_size, GFP_KERNEL);
1621         if (!event.msg_buf)
1622                 return;
1623
1624         v_msg = (struct i40e_virtchnl_msg *)&event.desc;
1625         do {
1626                 ret = i40evf_clean_arq_element(hw, &event, &pending);
1627                 if (ret)
1628                         break; /* No event to process or error cleaning ARQ */
1629
1630                 i40evf_virtchnl_completion(adapter, v_msg->v_opcode,
1631                                            v_msg->v_retval, event.msg_buf,
1632                                            event.msg_size);
1633                 if (pending != 0) {
1634                         dev_info(&adapter->pdev->dev,
1635                                  "%s: ARQ: Pending events %d\n",
1636                                  __func__, pending);
1637                         memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
1638                 }
1639         } while (pending);
1640
1641         /* check for error indications */
1642         val = rd32(hw, hw->aq.arq.len);
1643         oldval = val;
1644         if (val & I40E_VF_ARQLEN_ARQVFE_MASK) {
1645                 dev_info(&adapter->pdev->dev, "ARQ VF Error detected\n");
1646                 val &= ~I40E_VF_ARQLEN_ARQVFE_MASK;
1647         }
1648         if (val & I40E_VF_ARQLEN_ARQOVFL_MASK) {
1649                 dev_info(&adapter->pdev->dev, "ARQ Overflow Error detected\n");
1650                 val &= ~I40E_VF_ARQLEN_ARQOVFL_MASK;
1651         }
1652         if (val & I40E_VF_ARQLEN_ARQCRIT_MASK) {
1653                 dev_info(&adapter->pdev->dev, "ARQ Critical Error detected\n");
1654                 val &= ~I40E_VF_ARQLEN_ARQCRIT_MASK;
1655         }
1656         if (oldval != val)
1657                 wr32(hw, hw->aq.arq.len, val);
1658
1659         val = rd32(hw, hw->aq.asq.len);
1660         oldval = val;
1661         if (val & I40E_VF_ATQLEN_ATQVFE_MASK) {
1662                 dev_info(&adapter->pdev->dev, "ASQ VF Error detected\n");
1663                 val &= ~I40E_VF_ATQLEN_ATQVFE_MASK;
1664         }
1665         if (val & I40E_VF_ATQLEN_ATQOVFL_MASK) {
1666                 dev_info(&adapter->pdev->dev, "ASQ Overflow Error detected\n");
1667                 val &= ~I40E_VF_ATQLEN_ATQOVFL_MASK;
1668         }
1669         if (val & I40E_VF_ATQLEN_ATQCRIT_MASK) {
1670                 dev_info(&adapter->pdev->dev, "ASQ Critical Error detected\n");
1671                 val &= ~I40E_VF_ATQLEN_ATQCRIT_MASK;
1672         }
1673         if (oldval != val)
1674                 wr32(hw, hw->aq.asq.len, val);
1675
1676         /* re-enable Admin queue interrupt cause */
1677         i40evf_misc_irq_enable(adapter);
1678
1679         kfree(event.msg_buf);
1680 }
1681
1682 /**
1683  * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
1684  * @adapter: board private structure
1685  *
1686  * Free all transmit software resources
1687  **/
1688 static void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
1689 {
1690         int i;
1691
1692         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
1693                 if (adapter->tx_rings[i]->desc)
1694                         i40evf_free_tx_resources(adapter->tx_rings[i]);
1695
1696 }
1697
1698 /**
1699  * i40evf_setup_all_tx_resources - allocate all queues Tx resources
1700  * @adapter: board private structure
1701  *
1702  * If this function returns with an error, then it's possible one or
1703  * more of the rings is populated (while the rest are not).  It is the
1704  * callers duty to clean those orphaned rings.
1705  *
1706  * Return 0 on success, negative on failure
1707  **/
1708 static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter)
1709 {
1710         int i, err = 0;
1711
1712         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1713                 adapter->tx_rings[i]->count = adapter->tx_desc_count;
1714                 err = i40evf_setup_tx_descriptors(adapter->tx_rings[i]);
1715                 if (!err)
1716                         continue;
1717                 dev_err(&adapter->pdev->dev,
1718                         "%s: Allocation for Tx Queue %u failed\n",
1719                         __func__, i);
1720                 break;
1721         }
1722
1723         return err;
1724 }
1725
1726 /**
1727  * i40evf_setup_all_rx_resources - allocate all queues Rx resources
1728  * @adapter: board private structure
1729  *
1730  * If this function returns with an error, then it's possible one or
1731  * more of the rings is populated (while the rest are not).  It is the
1732  * callers duty to clean those orphaned rings.
1733  *
1734  * Return 0 on success, negative on failure
1735  **/
1736 static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter)
1737 {
1738         int i, err = 0;
1739
1740         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1741                 adapter->rx_rings[i]->count = adapter->rx_desc_count;
1742                 err = i40evf_setup_rx_descriptors(adapter->rx_rings[i]);
1743                 if (!err)
1744                         continue;
1745                 dev_err(&adapter->pdev->dev,
1746                         "%s: Allocation for Rx Queue %u failed\n",
1747                         __func__, i);
1748                 break;
1749         }
1750         return err;
1751 }
1752
1753 /**
1754  * i40evf_free_all_rx_resources - Free Rx Resources for All Queues
1755  * @adapter: board private structure
1756  *
1757  * Free all receive software resources
1758  **/
1759 static void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
1760 {
1761         int i;
1762
1763         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
1764                 if (adapter->rx_rings[i]->desc)
1765                         i40evf_free_rx_resources(adapter->rx_rings[i]);
1766 }
1767
1768 /**
1769  * i40evf_open - Called when a network interface is made active
1770  * @netdev: network interface device structure
1771  *
1772  * Returns 0 on success, negative value on failure
1773  *
1774  * The open entry point is called when a network interface is made
1775  * active by the system (IFF_UP).  At this point all resources needed
1776  * for transmit and receive operations are allocated, the interrupt
1777  * handler is registered with the OS, the watchdog timer is started,
1778  * and the stack is notified that the interface is ready.
1779  **/
1780 static int i40evf_open(struct net_device *netdev)
1781 {
1782         struct i40evf_adapter *adapter = netdev_priv(netdev);
1783         int err;
1784
1785         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1786                 dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
1787                 return -EIO;
1788         }
1789         if (adapter->state != __I40EVF_DOWN)
1790                 return -EBUSY;
1791
1792         /* allocate transmit descriptors */
1793         err = i40evf_setup_all_tx_resources(adapter);
1794         if (err)
1795                 goto err_setup_tx;
1796
1797         /* allocate receive descriptors */
1798         err = i40evf_setup_all_rx_resources(adapter);
1799         if (err)
1800                 goto err_setup_rx;
1801
1802         /* clear any pending interrupts, may auto mask */
1803         err = i40evf_request_traffic_irqs(adapter, netdev->name);
1804         if (err)
1805                 goto err_req_irq;
1806
1807         i40evf_configure(adapter);
1808
1809         err = i40evf_up_complete(adapter);
1810         if (err)
1811                 goto err_req_irq;
1812
1813         i40evf_irq_enable(adapter, true);
1814
1815         return 0;
1816
1817 err_req_irq:
1818         i40evf_down(adapter);
1819         i40evf_free_traffic_irqs(adapter);
1820 err_setup_rx:
1821         i40evf_free_all_rx_resources(adapter);
1822 err_setup_tx:
1823         i40evf_free_all_tx_resources(adapter);
1824
1825         return err;
1826 }
1827
1828 /**
1829  * i40evf_close - Disables a network interface
1830  * @netdev: network interface device structure
1831  *
1832  * Returns 0, this is not allowed to fail
1833  *
1834  * The close entry point is called when an interface is de-activated
1835  * by the OS.  The hardware is still under the drivers control, but
1836  * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
1837  * are freed, along with all transmit and receive resources.
1838  **/
1839 static int i40evf_close(struct net_device *netdev)
1840 {
1841         struct i40evf_adapter *adapter = netdev_priv(netdev);
1842
1843         if (adapter->state <= __I40EVF_DOWN)
1844                 return 0;
1845
1846
1847         set_bit(__I40E_DOWN, &adapter->vsi.state);
1848
1849         i40evf_down(adapter);
1850         adapter->state = __I40EVF_DOWN;
1851         i40evf_free_traffic_irqs(adapter);
1852
1853         i40evf_free_all_tx_resources(adapter);
1854         i40evf_free_all_rx_resources(adapter);
1855
1856         return 0;
1857 }
1858
1859 /**
1860  * i40evf_get_stats - Get System Network Statistics
1861  * @netdev: network interface device structure
1862  *
1863  * Returns the address of the device statistics structure.
1864  * The statistics are actually updated from the timer callback.
1865  **/
1866 static struct net_device_stats *i40evf_get_stats(struct net_device *netdev)
1867 {
1868         struct i40evf_adapter *adapter = netdev_priv(netdev);
1869
1870         /* only return the current stats */
1871         return &adapter->net_stats;
1872 }
1873
1874 /**
1875  * i40evf_reinit_locked - Software reinit
1876  * @adapter: board private structure
1877  *
1878  * Reinititalizes the ring structures in response to a software configuration
1879  * change. Roughly the same as close followed by open, but skips releasing
1880  * and reallocating the interrupts.
1881  **/
1882 void i40evf_reinit_locked(struct i40evf_adapter *adapter)
1883 {
1884         struct net_device *netdev = adapter->netdev;
1885         int err;
1886
1887         WARN_ON(in_interrupt());
1888
1889         i40evf_down(adapter);
1890
1891         /* allocate transmit descriptors */
1892         err = i40evf_setup_all_tx_resources(adapter);
1893         if (err)
1894                 goto err_reinit;
1895
1896         /* allocate receive descriptors */
1897         err = i40evf_setup_all_rx_resources(adapter);
1898         if (err)
1899                 goto err_reinit;
1900
1901         i40evf_configure(adapter);
1902
1903         err = i40evf_up_complete(adapter);
1904         if (err)
1905                 goto err_reinit;
1906
1907         i40evf_irq_enable(adapter, true);
1908         return;
1909
1910 err_reinit:
1911         dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
1912         i40evf_close(netdev);
1913 }
1914
1915 /**
1916  * i40evf_change_mtu - Change the Maximum Transfer Unit
1917  * @netdev: network interface device structure
1918  * @new_mtu: new value for maximum frame size
1919  *
1920  * Returns 0 on success, negative on failure
1921  **/
1922 static int i40evf_change_mtu(struct net_device *netdev, int new_mtu)
1923 {
1924         struct i40evf_adapter *adapter = netdev_priv(netdev);
1925         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
1926
1927         if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
1928                 return -EINVAL;
1929
1930         /* must set new MTU before calling down or up */
1931         netdev->mtu = new_mtu;
1932         i40evf_reinit_locked(adapter);
1933         return 0;
1934 }
1935
1936 static const struct net_device_ops i40evf_netdev_ops = {
1937         .ndo_open               = i40evf_open,
1938         .ndo_stop               = i40evf_close,
1939         .ndo_start_xmit         = i40evf_xmit_frame,
1940         .ndo_get_stats          = i40evf_get_stats,
1941         .ndo_set_rx_mode        = i40evf_set_rx_mode,
1942         .ndo_validate_addr      = eth_validate_addr,
1943         .ndo_set_mac_address    = i40evf_set_mac,
1944         .ndo_change_mtu         = i40evf_change_mtu,
1945         .ndo_tx_timeout         = i40evf_tx_timeout,
1946         .ndo_vlan_rx_add_vid    = i40evf_vlan_rx_add_vid,
1947         .ndo_vlan_rx_kill_vid   = i40evf_vlan_rx_kill_vid,
1948 };
1949
1950 /**
1951  * i40evf_check_reset_complete - check that VF reset is complete
1952  * @hw: pointer to hw struct
1953  *
1954  * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
1955  **/
1956 static int i40evf_check_reset_complete(struct i40e_hw *hw)
1957 {
1958         u32 rstat;
1959         int i;
1960
1961         for (i = 0; i < 100; i++) {
1962                 rstat = rd32(hw, I40E_VFGEN_RSTAT) &
1963                             I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1964                 if ((rstat == I40E_VFR_VFACTIVE) ||
1965                     (rstat == I40E_VFR_COMPLETED))
1966                         return 0;
1967                 udelay(10);
1968         }
1969         return -EBUSY;
1970 }
1971
1972 /**
1973  * i40evf_init_task - worker thread to perform delayed initialization
1974  * @work: pointer to work_struct containing our data
1975  *
1976  * This task completes the work that was begun in probe. Due to the nature
1977  * of VF-PF communications, we may need to wait tens of milliseconds to get
1978  * reponses back from the PF. Rather than busy-wait in probe and bog down the
1979  * whole system, we'll do it in a task so we can sleep.
1980  * This task only runs during driver init. Once we've established
1981  * communications with the PF driver and set up our netdev, the watchdog
1982  * takes over.
1983  **/
1984 static void i40evf_init_task(struct work_struct *work)
1985 {
1986         struct i40evf_adapter *adapter = container_of(work,
1987                                                       struct i40evf_adapter,
1988                                                       init_task.work);
1989         struct net_device *netdev = adapter->netdev;
1990         struct i40evf_mac_filter *f;
1991         struct i40e_hw *hw = &adapter->hw;
1992         struct pci_dev *pdev = adapter->pdev;
1993         int i, err, bufsz;
1994
1995         switch (adapter->state) {
1996         case __I40EVF_STARTUP:
1997                 /* driver loaded, probe complete */
1998                 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1999                 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
2000                 err = i40e_set_mac_type(hw);
2001                 if (err) {
2002                         dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
2003                                 err);
2004                 goto err;
2005                 }
2006                 err = i40evf_check_reset_complete(hw);
2007                 if (err) {
2008                         dev_info(&pdev->dev, "Device is still in reset (%d), retrying\n",
2009                                 err);
2010                         goto err;
2011                 }
2012                 hw->aq.num_arq_entries = I40EVF_AQ_LEN;
2013                 hw->aq.num_asq_entries = I40EVF_AQ_LEN;
2014                 hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2015                 hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2016
2017                 err = i40evf_init_adminq(hw);
2018                 if (err) {
2019                         dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
2020                                 err);
2021                         goto err;
2022                 }
2023                 err = i40evf_send_api_ver(adapter);
2024                 if (err) {
2025                         dev_err(&pdev->dev, "Unable to send to PF (%d)\n", err);
2026                         i40evf_shutdown_adminq(hw);
2027                         goto err;
2028                 }
2029                 adapter->state = __I40EVF_INIT_VERSION_CHECK;
2030                 goto restart;
2031         case __I40EVF_INIT_VERSION_CHECK:
2032                 if (!i40evf_asq_done(hw)) {
2033                         dev_err(&pdev->dev, "Admin queue command never completed\n");
2034                         goto err;
2035                 }
2036
2037                 /* aq msg sent, awaiting reply */
2038                 err = i40evf_verify_api_ver(adapter);
2039                 if (err) {
2040                         dev_info(&pdev->dev, "Unable to verify API version (%d), retrying\n",
2041                                 err);
2042                         if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK) {
2043                                 dev_info(&pdev->dev, "Resending request\n");
2044                                 err = i40evf_send_api_ver(adapter);
2045                         }
2046                         goto err;
2047                 }
2048                 err = i40evf_send_vf_config_msg(adapter);
2049                 if (err) {
2050                         dev_err(&pdev->dev, "Unable to send config request (%d)\n",
2051                                 err);
2052                         goto err;
2053                 }
2054                 adapter->state = __I40EVF_INIT_GET_RESOURCES;
2055                 goto restart;
2056         case __I40EVF_INIT_GET_RESOURCES:
2057                 /* aq msg sent, awaiting reply */
2058                 if (!adapter->vf_res) {
2059                         bufsz = sizeof(struct i40e_virtchnl_vf_resource) +
2060                                 (I40E_MAX_VF_VSI *
2061                                  sizeof(struct i40e_virtchnl_vsi_resource));
2062                         adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
2063                         if (!adapter->vf_res)
2064                                 goto err;
2065                 }
2066                 err = i40evf_get_vf_config(adapter);
2067                 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
2068                         goto restart;
2069                 if (err) {
2070                         dev_err(&pdev->dev, "Unable to get VF config (%d)\n",
2071                                 err);
2072                         goto err_alloc;
2073                 }
2074                 adapter->state = __I40EVF_INIT_SW;
2075                 break;
2076         default:
2077                 goto err_alloc;
2078         }
2079         /* got VF config message back from PF, now we can parse it */
2080         for (i = 0; i < adapter->vf_res->num_vsis; i++) {
2081                 if (adapter->vf_res->vsi_res[i].vsi_type == I40E_VSI_SRIOV)
2082                         adapter->vsi_res = &adapter->vf_res->vsi_res[i];
2083         }
2084         if (!adapter->vsi_res) {
2085                 dev_err(&pdev->dev, "No LAN VSI found\n");
2086                 goto err_alloc;
2087         }
2088
2089         adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
2090
2091         netdev->netdev_ops = &i40evf_netdev_ops;
2092         i40evf_set_ethtool_ops(netdev);
2093         netdev->watchdog_timeo = 5 * HZ;
2094         netdev->features |= NETIF_F_HIGHDMA |
2095                             NETIF_F_SG |
2096                             NETIF_F_IP_CSUM |
2097                             NETIF_F_SCTP_CSUM |
2098                             NETIF_F_IPV6_CSUM |
2099                             NETIF_F_TSO |
2100                             NETIF_F_TSO6 |
2101                             NETIF_F_RXCSUM |
2102                             NETIF_F_GRO;
2103
2104         if (adapter->vf_res->vf_offload_flags
2105             & I40E_VIRTCHNL_VF_OFFLOAD_VLAN) {
2106                 netdev->vlan_features = netdev->features;
2107                 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX |
2108                                     NETIF_F_HW_VLAN_CTAG_RX |
2109                                     NETIF_F_HW_VLAN_CTAG_FILTER;
2110         }
2111
2112         /* copy netdev features into list of user selectable features */
2113         netdev->hw_features |= netdev->features;
2114         netdev->hw_features &= ~NETIF_F_RXCSUM;
2115
2116         if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
2117                 dev_info(&pdev->dev, "Invalid MAC address %pM, using random\n",
2118                          adapter->hw.mac.addr);
2119                 random_ether_addr(adapter->hw.mac.addr);
2120         }
2121         ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
2122         ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
2123
2124         INIT_LIST_HEAD(&adapter->mac_filter_list);
2125         INIT_LIST_HEAD(&adapter->vlan_filter_list);
2126         f = kzalloc(sizeof(*f), GFP_ATOMIC);
2127         if (NULL == f)
2128                 goto err_sw_init;
2129
2130         ether_addr_copy(f->macaddr, adapter->hw.mac.addr);
2131         f->add = true;
2132         adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
2133
2134         list_add(&f->list, &adapter->mac_filter_list);
2135
2136         init_timer(&adapter->watchdog_timer);
2137         adapter->watchdog_timer.function = &i40evf_watchdog_timer;
2138         adapter->watchdog_timer.data = (unsigned long)adapter;
2139         mod_timer(&adapter->watchdog_timer, jiffies + 1);
2140
2141         adapter->tx_desc_count = I40EVF_DEFAULT_TXD;
2142         adapter->rx_desc_count = I40EVF_DEFAULT_RXD;
2143         err = i40evf_init_interrupt_scheme(adapter);
2144         if (err)
2145                 goto err_sw_init;
2146         i40evf_map_rings_to_vectors(adapter);
2147         i40evf_configure_rss(adapter);
2148         err = i40evf_request_misc_irq(adapter);
2149         if (err)
2150                 goto err_sw_init;
2151
2152         netif_carrier_off(netdev);
2153
2154         adapter->vsi.id = adapter->vsi_res->vsi_id;
2155         adapter->vsi.seid = adapter->vsi_res->vsi_id; /* dummy */
2156         adapter->vsi.back = adapter;
2157         adapter->vsi.base_vector = 1;
2158         adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
2159         adapter->vsi.rx_itr_setting = (I40E_ITR_DYNAMIC |
2160                                        ITR_REG_TO_USEC(I40E_ITR_RX_DEF));
2161         adapter->vsi.tx_itr_setting = (I40E_ITR_DYNAMIC |
2162                                        ITR_REG_TO_USEC(I40E_ITR_TX_DEF));
2163         adapter->vsi.netdev = adapter->netdev;
2164
2165         if (!adapter->netdev_registered) {
2166                 err = register_netdev(netdev);
2167                 if (err)
2168                         goto err_register;
2169         }
2170
2171         adapter->netdev_registered = true;
2172
2173         netif_tx_stop_all_queues(netdev);
2174
2175         dev_info(&pdev->dev, "MAC address: %pM\n", adapter->hw.mac.addr);
2176         if (netdev->features & NETIF_F_GRO)
2177                 dev_info(&pdev->dev, "GRO is enabled\n");
2178
2179         dev_info(&pdev->dev, "%s\n", i40evf_driver_string);
2180         adapter->state = __I40EVF_DOWN;
2181         set_bit(__I40E_DOWN, &adapter->vsi.state);
2182         i40evf_misc_irq_enable(adapter);
2183         return;
2184 restart:
2185         schedule_delayed_work(&adapter->init_task,
2186                               msecs_to_jiffies(50));
2187         return;
2188
2189 err_register:
2190         i40evf_free_misc_irq(adapter);
2191 err_sw_init:
2192         i40evf_reset_interrupt_capability(adapter);
2193 err_alloc:
2194         kfree(adapter->vf_res);
2195         adapter->vf_res = NULL;
2196 err:
2197         /* Things went into the weeds, so try again later */
2198         if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
2199                 dev_err(&pdev->dev, "Failed to communicate with PF; giving up\n");
2200                 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
2201                 return; /* do not reschedule */
2202         }
2203         schedule_delayed_work(&adapter->init_task, HZ * 3);
2204 }
2205
2206 /**
2207  * i40evf_shutdown - Shutdown the device in preparation for a reboot
2208  * @pdev: pci device structure
2209  **/
2210 static void i40evf_shutdown(struct pci_dev *pdev)
2211 {
2212         struct net_device *netdev = pci_get_drvdata(pdev);
2213
2214         netif_device_detach(netdev);
2215
2216         if (netif_running(netdev))
2217                 i40evf_close(netdev);
2218
2219 #ifdef CONFIG_PM
2220         pci_save_state(pdev);
2221
2222 #endif
2223         pci_disable_device(pdev);
2224 }
2225
2226 /**
2227  * i40evf_probe - Device Initialization Routine
2228  * @pdev: PCI device information struct
2229  * @ent: entry in i40evf_pci_tbl
2230  *
2231  * Returns 0 on success, negative on failure
2232  *
2233  * i40evf_probe initializes an adapter identified by a pci_dev structure.
2234  * The OS initialization, configuring of the adapter private structure,
2235  * and a hardware reset occur.
2236  **/
2237 static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2238 {
2239         struct net_device *netdev;
2240         struct i40evf_adapter *adapter = NULL;
2241         struct i40e_hw *hw = NULL;
2242         int err;
2243
2244         err = pci_enable_device(pdev);
2245         if (err)
2246                 return err;
2247
2248         err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
2249         if (err) {
2250                 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2251                 if (err) {
2252                         dev_err(&pdev->dev,
2253                                 "DMA configuration failed: 0x%x\n", err);
2254                         goto err_dma;
2255                 }
2256         }
2257
2258         err = pci_request_regions(pdev, i40evf_driver_name);
2259         if (err) {
2260                 dev_err(&pdev->dev,
2261                         "pci_request_regions failed 0x%x\n", err);
2262                 goto err_pci_reg;
2263         }
2264
2265         pci_enable_pcie_error_reporting(pdev);
2266
2267         pci_set_master(pdev);
2268
2269         netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter),
2270                                    MAX_TX_QUEUES);
2271         if (!netdev) {
2272                 err = -ENOMEM;
2273                 goto err_alloc_etherdev;
2274         }
2275
2276         SET_NETDEV_DEV(netdev, &pdev->dev);
2277
2278         pci_set_drvdata(pdev, netdev);
2279         adapter = netdev_priv(netdev);
2280
2281         adapter->netdev = netdev;
2282         adapter->pdev = pdev;
2283
2284         hw = &adapter->hw;
2285         hw->back = adapter;
2286
2287         adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
2288         adapter->state = __I40EVF_STARTUP;
2289
2290         /* Call save state here because it relies on the adapter struct. */
2291         pci_save_state(pdev);
2292
2293         hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
2294                               pci_resource_len(pdev, 0));
2295         if (!hw->hw_addr) {
2296                 err = -EIO;
2297                 goto err_ioremap;
2298         }
2299         hw->vendor_id = pdev->vendor;
2300         hw->device_id = pdev->device;
2301         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2302         hw->subsystem_vendor_id = pdev->subsystem_vendor;
2303         hw->subsystem_device_id = pdev->subsystem_device;
2304         hw->bus.device = PCI_SLOT(pdev->devfn);
2305         hw->bus.func = PCI_FUNC(pdev->devfn);
2306
2307         INIT_WORK(&adapter->reset_task, i40evf_reset_task);
2308         INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
2309         INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
2310         INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
2311         schedule_delayed_work(&adapter->init_task, 10);
2312
2313         return 0;
2314
2315 err_ioremap:
2316         free_netdev(netdev);
2317 err_alloc_etherdev:
2318         pci_release_regions(pdev);
2319 err_pci_reg:
2320 err_dma:
2321         pci_disable_device(pdev);
2322         return err;
2323 }
2324
2325 #ifdef CONFIG_PM
2326 /**
2327  * i40evf_suspend - Power management suspend routine
2328  * @pdev: PCI device information struct
2329  * @state: unused
2330  *
2331  * Called when the system (VM) is entering sleep/suspend.
2332  **/
2333 static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
2334 {
2335         struct net_device *netdev = pci_get_drvdata(pdev);
2336         struct i40evf_adapter *adapter = netdev_priv(netdev);
2337         int retval = 0;
2338
2339         netif_device_detach(netdev);
2340
2341         if (netif_running(netdev)) {
2342                 rtnl_lock();
2343                 i40evf_down(adapter);
2344                 rtnl_unlock();
2345         }
2346         i40evf_free_misc_irq(adapter);
2347         i40evf_reset_interrupt_capability(adapter);
2348
2349         retval = pci_save_state(pdev);
2350         if (retval)
2351                 return retval;
2352
2353         pci_disable_device(pdev);
2354
2355         return 0;
2356 }
2357
2358 /**
2359  * i40evf_resume - Power managment resume routine
2360  * @pdev: PCI device information struct
2361  *
2362  * Called when the system (VM) is resumed from sleep/suspend.
2363  **/
2364 static int i40evf_resume(struct pci_dev *pdev)
2365 {
2366         struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
2367         struct net_device *netdev = adapter->netdev;
2368         u32 err;
2369
2370         pci_set_power_state(pdev, PCI_D0);
2371         pci_restore_state(pdev);
2372         /* pci_restore_state clears dev->state_saved so call
2373          * pci_save_state to restore it.
2374          */
2375         pci_save_state(pdev);
2376
2377         err = pci_enable_device_mem(pdev);
2378         if (err) {
2379                 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
2380                 return err;
2381         }
2382         pci_set_master(pdev);
2383
2384         rtnl_lock();
2385         err = i40evf_set_interrupt_capability(adapter);
2386         if (err) {
2387                 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
2388                 return err;
2389         }
2390         err = i40evf_request_misc_irq(adapter);
2391         rtnl_unlock();
2392         if (err) {
2393                 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
2394                 return err;
2395         }
2396
2397         schedule_work(&adapter->reset_task);
2398
2399         netif_device_attach(netdev);
2400
2401         return err;
2402 }
2403
2404 #endif /* CONFIG_PM */
2405 /**
2406  * i40evf_remove - Device Removal Routine
2407  * @pdev: PCI device information struct
2408  *
2409  * i40evf_remove is called by the PCI subsystem to alert the driver
2410  * that it should release a PCI device.  The could be caused by a
2411  * Hot-Plug event, or because the driver is going to be removed from
2412  * memory.
2413  **/
2414 static void i40evf_remove(struct pci_dev *pdev)
2415 {
2416         struct net_device *netdev = pci_get_drvdata(pdev);
2417         struct i40evf_adapter *adapter = netdev_priv(netdev);
2418         struct i40e_hw *hw = &adapter->hw;
2419
2420         cancel_delayed_work_sync(&adapter->init_task);
2421         cancel_work_sync(&adapter->reset_task);
2422
2423         if (adapter->netdev_registered) {
2424                 unregister_netdev(netdev);
2425                 adapter->netdev_registered = false;
2426         }
2427         adapter->state = __I40EVF_REMOVE;
2428
2429         if (adapter->msix_entries) {
2430                 i40evf_misc_irq_disable(adapter);
2431                 i40evf_free_misc_irq(adapter);
2432                 i40evf_reset_interrupt_capability(adapter);
2433                 i40evf_free_q_vectors(adapter);
2434         }
2435
2436         if (adapter->watchdog_timer.function)
2437                 del_timer_sync(&adapter->watchdog_timer);
2438
2439         flush_scheduled_work();
2440
2441         if (hw->aq.asq.count)
2442                 i40evf_shutdown_adminq(hw);
2443
2444         iounmap(hw->hw_addr);
2445         pci_release_regions(pdev);
2446
2447         i40evf_free_queues(adapter);
2448         kfree(adapter->vf_res);
2449
2450         free_netdev(netdev);
2451
2452         pci_disable_pcie_error_reporting(pdev);
2453
2454         pci_disable_device(pdev);
2455 }
2456
2457 static struct pci_driver i40evf_driver = {
2458         .name     = i40evf_driver_name,
2459         .id_table = i40evf_pci_tbl,
2460         .probe    = i40evf_probe,
2461         .remove   = i40evf_remove,
2462 #ifdef CONFIG_PM
2463         .suspend  = i40evf_suspend,
2464         .resume   = i40evf_resume,
2465 #endif
2466         .shutdown = i40evf_shutdown,
2467 };
2468
2469 /**
2470  * i40e_init_module - Driver Registration Routine
2471  *
2472  * i40e_init_module is the first routine called when the driver is
2473  * loaded. All it does is register with the PCI subsystem.
2474  **/
2475 static int __init i40evf_init_module(void)
2476 {
2477         int ret;
2478         pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
2479                i40evf_driver_version);
2480
2481         pr_info("%s\n", i40evf_copyright);
2482
2483         ret = pci_register_driver(&i40evf_driver);
2484         return ret;
2485 }
2486
2487 module_init(i40evf_init_module);
2488
2489 /**
2490  * i40e_exit_module - Driver Exit Cleanup Routine
2491  *
2492  * i40e_exit_module is called just before the driver is removed
2493  * from memory.
2494  **/
2495 static void __exit i40evf_exit_module(void)
2496 {
2497         pci_unregister_driver(&i40evf_driver);
2498 }
2499
2500 module_exit(i40evf_exit_module);
2501
2502 /* i40evf_main.c */