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

   1 /*******************************************************************************
   2  *
   3  * Intel Ethernet Controller XL710 Family Linux Virtual Function Driver
   4  * Copyright(c) 2013 - 2015 Intel Corporation.
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms and conditions of the GNU General Public License,
   8  * version 2, as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  * The full GNU General Public License is included in this distribution in
  19  * the file called "COPYING".
  20  *
  21  * Contact Information:
  22  * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  23  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  24  *
  25  ******************************************************************************/
  26
  27 #include "i40evf.h"
  28 #include "i40e_prototype.h"
  29 static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter);
  30 static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter);
  31 static int i40evf_close(struct net_device *netdev);
  32
  33 char i40evf_driver_name[] = "i40evf";
  34 static const char i40evf_driver_string[] =
  35         "Intel(R) XL710/X710 Virtual Function Network Driver";
  36
  37 #define DRV_VERSION "1.2.25"
  38 const char i40evf_driver_version[] = DRV_VERSION;
  39 static const char i40evf_copyright[] =
  40         "Copyright (c) 2013 - 2014 Intel Corporation.";
  41
  42 /* i40evf_pci_tbl - PCI Device ID Table
  43  *
  44  * Wildcard entries (PCI_ANY_ID) should come last
  45  * Last entry must be all 0s
  46  *
  47  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  48  *   Class, Class Mask, private data (not used) }
  49  */
  50 static const struct pci_device_id i40evf_pci_tbl[] = {
  51         {PCI_VDEVICE(INTEL, I40E_DEV_ID_VF), 0},
  52         /* required last entry */
  53         {0, }
  54 };
  55
  56 MODULE_DEVICE_TABLE(pci, i40evf_pci_tbl);
  57
  58 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
  59 MODULE_DESCRIPTION("Intel(R) XL710 X710 Virtual Function Network Driver");
  60 MODULE_LICENSE("GPL");
  61 MODULE_VERSION(DRV_VERSION);
  62
  63 /**
  64  * i40evf_allocate_dma_mem_d - OS specific memory alloc for shared code
  65  * @hw:   pointer to the HW structure
  66  * @mem:  ptr to mem struct to fill out
  67  * @size: size of memory requested
  68  * @alignment: what to align the allocation to
  69  **/
  70 i40e_status i40evf_allocate_dma_mem_d(struct i40e_hw *hw,
  71                                       struct i40e_dma_mem *mem,
  72                                       u64 size, u32 alignment)
  73 {
  74         struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
  75
  76         if (!mem)
  77                 return I40E_ERR_PARAM;
  78
  79         mem->size = ALIGN(size, alignment);
  80         mem->va = dma_alloc_coherent(&adapter->pdev->dev, mem->size,
  81                                      (dma_addr_t *)&mem->pa, GFP_KERNEL);
  82         if (mem->va)
  83                 return 0;
  84         else
  85                 return I40E_ERR_NO_MEMORY;
  86 }
  87
  88 /**
  89  * i40evf_free_dma_mem_d - OS specific memory free for shared code
  90  * @hw:   pointer to the HW structure
  91  * @mem:  ptr to mem struct to free
  92  **/
  93 i40e_status i40evf_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem)
  94 {
  95         struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
  96
  97         if (!mem || !mem->va)
  98                 return I40E_ERR_PARAM;
  99         dma_free_coherent(&adapter->pdev->dev, mem->size,
 100                           mem->va, (dma_addr_t)mem->pa);
 101         return 0;
 102 }
 103
 104 /**
 105  * i40evf_allocate_virt_mem_d - OS specific memory alloc for shared code
 106  * @hw:   pointer to the HW structure
 107  * @mem:  ptr to mem struct to fill out
 108  * @size: size of memory requested
 109  **/
 110 i40e_status i40evf_allocate_virt_mem_d(struct i40e_hw *hw,
 111                                        struct i40e_virt_mem *mem, u32 size)
 112 {
 113         if (!mem)
 114                 return I40E_ERR_PARAM;
 115
 116         mem->size = size;
 117         mem->va = kzalloc(size, GFP_KERNEL);
 118
 119         if (mem->va)
 120                 return 0;
 121         else
 122                 return I40E_ERR_NO_MEMORY;
 123 }
 124
 125 /**
 126  * i40evf_free_virt_mem_d - OS specific memory free for shared code
 127  * @hw:   pointer to the HW structure
 128  * @mem:  ptr to mem struct to free
 129  **/
 130 i40e_status i40evf_free_virt_mem_d(struct i40e_hw *hw,
 131                                    struct i40e_virt_mem *mem)
 132 {
 133         if (!mem)
 134                 return I40E_ERR_PARAM;
 135
 136         /* it's ok to kfree a NULL pointer */
 137         kfree(mem->va);
 138
 139         return 0;
 140 }
 141
 142 /**
 143  * i40evf_debug_d - OS dependent version of debug printing
 144  * @hw:  pointer to the HW structure
 145  * @mask: debug level mask
 146  * @fmt_str: printf-type format description
 147  **/
 148 void i40evf_debug_d(void *hw, u32 mask, char *fmt_str, ...)
 149 {
 150         char buf[512];
 151         va_list argptr;
 152
 153         if (!(mask & ((struct i40e_hw *)hw)->debug_mask))
 154                 return;
 155
 156         va_start(argptr, fmt_str);
 157         vsnprintf(buf, sizeof(buf), fmt_str, argptr);
 158         va_end(argptr);
 159
 160         /* the debug string is already formatted with a newline */
 161         pr_info("%s", buf);
 162 }
 163
 164 /**
 165  * i40evf_tx_timeout - Respond to a Tx Hang
 166  * @netdev: network interface device structure
 167  **/
 168 static void i40evf_tx_timeout(struct net_device *netdev)
 169 {
 170         struct i40evf_adapter *adapter = netdev_priv(netdev);
 171
 172         adapter->tx_timeout_count++;
 173         if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING)) {
 174                 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
 175                 schedule_work(&adapter->reset_task);
 176         }
 177 }
 178
 179 /**
 180  * i40evf_misc_irq_disable - Mask off interrupt generation on the NIC
 181  * @adapter: board private structure
 182  **/
 183 static void i40evf_misc_irq_disable(struct i40evf_adapter *adapter)
 184 {
 185         struct i40e_hw *hw = &adapter->hw;
 186
 187         wr32(hw, I40E_VFINT_DYN_CTL01, 0);
 188
 189         /* read flush */
 190         rd32(hw, I40E_VFGEN_RSTAT);
 191
 192         synchronize_irq(adapter->msix_entries[0].vector);
 193 }
 194
 195 /**
 196  * i40evf_misc_irq_enable - Enable default interrupt generation settings
 197  * @adapter: board private structure
 198  **/
 199 static void i40evf_misc_irq_enable(struct i40evf_adapter *adapter)
 200 {
 201         struct i40e_hw *hw = &adapter->hw;
 202
 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  * i40evf_irq_enable_queues - Enable interrupt for specified queues
 233  * @adapter: board private structure
 234  * @mask: bitmap of queues to enable
 235  **/
 236 void i40evf_irq_enable_queues(struct i40evf_adapter *adapter, u32 mask)
 237 {
 238         struct i40e_hw *hw = &adapter->hw;
 239         int i;
 240
 241         for (i = 1; i < adapter->num_msix_vectors; i++) {
 242                 if (mask & (1 << (i - 1))) {
 243                         wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1),
 244                              I40E_VFINT_DYN_CTLN1_INTENA_MASK |
 245                              I40E_VFINT_DYN_CTLN1_ITR_INDX_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, u32 mask)
 257 {
 258         struct i40e_hw *hw = &adapter->hw;
 259         int i;
 260         uint32_t dyn_ctl;
 261
 262         if (mask & 1) {
 263                 dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTL01);
 264                 dyn_ctl |= I40E_VFINT_DYN_CTLN_SWINT_TRIG_MASK |
 265                            I40E_VFINT_DYN_CTLN1_ITR_INDX_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_CTLN1_ITR_INDX_MASK |
 274                                    I40E_VFINT_DYN_CTLN_CLEARPBA_MASK;
 275                         wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), dyn_ctl);
 276                 }
 277         }
 278 }
 279
 280 /**
 281  * i40evf_irq_enable - Enable default interrupt generation settings
 282  * @adapter: board private structure
 283  **/
 284 void i40evf_irq_enable(struct i40evf_adapter *adapter, bool flush)
 285 {
 286         struct i40e_hw *hw = &adapter->hw;
 287
 288         i40evf_misc_irq_enable(adapter);
 289         i40evf_irq_enable_queues(adapter, ~0);
 290
 291         if (flush)
 292                 rd32(hw, I40E_VFGEN_RSTAT);
 293 }
 294
 295 /**
 296  * i40evf_msix_aq - Interrupt handler for vector 0
 297  * @irq: interrupt number
 298  * @data: pointer to netdev
 299  **/
 300 static irqreturn_t i40evf_msix_aq(int irq, void *data)
 301 {
 302         struct net_device *netdev = data;
 303         struct i40evf_adapter *adapter = netdev_priv(netdev);
 304         struct i40e_hw *hw = &adapter->hw;
 305         u32 val;
 306         u32 ena_mask;
 307
 308         /* handle non-queue interrupts */
 309         val = rd32(hw, I40E_VFINT_ICR01);
 310         ena_mask = rd32(hw, I40E_VFINT_ICR0_ENA1);
 311
 312
 313         val = rd32(hw, I40E_VFINT_DYN_CTL01);
 314         val = val | I40E_PFINT_DYN_CTL0_CLEARPBA_MASK;
 315         wr32(hw, I40E_VFINT_DYN_CTL01, val);
 316
 317         /* schedule work on the private workqueue */
 318         schedule_work(&adapter->adminq_task);
 319
 320         return IRQ_HANDLED;
 321 }
 322
 323 /**
 324  * i40evf_msix_clean_rings - MSIX mode Interrupt Handler
 325  * @irq: interrupt number
 326  * @data: pointer to a q_vector
 327  **/
 328 static irqreturn_t i40evf_msix_clean_rings(int irq, void *data)
 329 {
 330         struct i40e_q_vector *q_vector = data;
 331
 332         if (!q_vector->tx.ring && !q_vector->rx.ring)
 333                 return IRQ_HANDLED;
 334
 335         napi_schedule(&q_vector->napi);
 336
 337         return IRQ_HANDLED;
 338 }
 339
 340 /**
 341  * i40evf_map_vector_to_rxq - associate irqs with rx queues
 342  * @adapter: board private structure
 343  * @v_idx: interrupt number
 344  * @r_idx: queue number
 345  **/
 346 static void
 347 i40evf_map_vector_to_rxq(struct i40evf_adapter *adapter, int v_idx, int r_idx)
 348 {
 349         struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
 350         struct i40e_ring *rx_ring = adapter->rx_rings[r_idx];
 351
 352         rx_ring->q_vector = q_vector;
 353         rx_ring->next = q_vector->rx.ring;
 354         rx_ring->vsi = &adapter->vsi;
 355         q_vector->rx.ring = rx_ring;
 356         q_vector->rx.count++;
 357         q_vector->rx.latency_range = I40E_LOW_LATENCY;
 358 }
 359
 360 /**
 361  * i40evf_map_vector_to_txq - associate irqs with tx queues
 362  * @adapter: board private structure
 363  * @v_idx: interrupt number
 364  * @t_idx: queue number
 365  **/
 366 static void
 367 i40evf_map_vector_to_txq(struct i40evf_adapter *adapter, int v_idx, int t_idx)
 368 {
 369         struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
 370         struct i40e_ring *tx_ring = adapter->tx_rings[t_idx];
 371
 372         tx_ring->q_vector = q_vector;
 373         tx_ring->next = q_vector->tx.ring;
 374         tx_ring->vsi = &adapter->vsi;
 375         q_vector->tx.ring = tx_ring;
 376         q_vector->tx.count++;
 377         q_vector->tx.latency_range = I40E_LOW_LATENCY;
 378         q_vector->num_ringpairs++;
 379         q_vector->ring_mask |= (1 << t_idx);
 380 }
 381
 382 /**
 383  * i40evf_map_rings_to_vectors - Maps descriptor rings to vectors
 384  * @adapter: board private structure to initialize
 385  *
 386  * This function maps descriptor rings to the queue-specific vectors
 387  * we were allotted through the MSI-X enabling code.  Ideally, we'd have
 388  * one vector per ring/queue, but on a constrained vector budget, we
 389  * group the rings as "efficiently" as possible.  You would add new
 390  * mapping configurations in here.
 391  **/
 392 static int i40evf_map_rings_to_vectors(struct i40evf_adapter *adapter)
 393 {
 394         int q_vectors;
 395         int v_start = 0;
 396         int rxr_idx = 0, txr_idx = 0;
 397         int rxr_remaining = adapter->num_active_queues;
 398         int txr_remaining = adapter->num_active_queues;
 399         int i, j;
 400         int rqpv, tqpv;
 401         int err = 0;
 402
 403         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 404
 405         /* The ideal configuration...
 406          * We have enough vectors to map one per queue.
 407          */
 408         if (q_vectors == (rxr_remaining * 2)) {
 409                 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
 410                         i40evf_map_vector_to_rxq(adapter, v_start, rxr_idx);
 411
 412                 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
 413                         i40evf_map_vector_to_txq(adapter, v_start, txr_idx);
 414                 goto out;
 415         }
 416
 417         /* If we don't have enough vectors for a 1-to-1
 418          * mapping, we'll have to group them so there are
 419          * multiple queues per vector.
 420          * Re-adjusting *qpv takes care of the remainder.
 421          */
 422         for (i = v_start; i < q_vectors; i++) {
 423                 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
 424                 for (j = 0; j < rqpv; j++) {
 425                         i40evf_map_vector_to_rxq(adapter, i, rxr_idx);
 426                         rxr_idx++;
 427                         rxr_remaining--;
 428                 }
 429         }
 430         for (i = v_start; i < q_vectors; i++) {
 431                 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
 432                 for (j = 0; j < tqpv; j++) {
 433                         i40evf_map_vector_to_txq(adapter, i, txr_idx);
 434                         txr_idx++;
 435                         txr_remaining--;
 436                 }
 437         }
 438
 439 out:
 440         adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
 441
 442         return err;
 443 }
 444
 445 /**
 446  * i40evf_request_traffic_irqs - Initialize MSI-X interrupts
 447  * @adapter: board private structure
 448  *
 449  * Allocates MSI-X vectors for tx and rx handling, and requests
 450  * interrupts from the kernel.
 451  **/
 452 static int
 453 i40evf_request_traffic_irqs(struct i40evf_adapter *adapter, char *basename)
 454 {
 455         int vector, err, q_vectors;
 456         int rx_int_idx = 0, tx_int_idx = 0;
 457
 458         i40evf_irq_disable(adapter);
 459         /* Decrement for Other and TCP Timer vectors */
 460         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 461
 462         for (vector = 0; vector < q_vectors; vector++) {
 463                 struct i40e_q_vector *q_vector = adapter->q_vector[vector];
 464
 465                 if (q_vector->tx.ring && q_vector->rx.ring) {
 466                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 467                                  "i40evf-%s-%s-%d", basename,
 468                                  "TxRx", rx_int_idx++);
 469                         tx_int_idx++;
 470                 } else if (q_vector->rx.ring) {
 471                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 472                                  "i40evf-%s-%s-%d", basename,
 473                                  "rx", rx_int_idx++);
 474                 } else if (q_vector->tx.ring) {
 475                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 476                                  "i40evf-%s-%s-%d", basename,
 477                                  "tx", tx_int_idx++);
 478                 } else {
 479                         /* skip this unused q_vector */
 480                         continue;
 481                 }
 482                 err = request_irq(
 483                         adapter->msix_entries[vector + NONQ_VECS].vector,
 484                         i40evf_msix_clean_rings,
 485                         0,
 486                         q_vector->name,
 487                         q_vector);
 488                 if (err) {
 489                         dev_info(&adapter->pdev->dev,
 490                                  "%s: request_irq failed, error: %d\n",
 491                                 __func__, err);
 492                         goto free_queue_irqs;
 493                 }
 494                 /* assign the mask for this irq */
 495                 irq_set_affinity_hint(
 496                         adapter->msix_entries[vector + NONQ_VECS].vector,
 497                         q_vector->affinity_mask);
 498         }
 499
 500         return 0;
 501
 502 free_queue_irqs:
 503         while (vector) {
 504                 vector--;
 505                 irq_set_affinity_hint(
 506                         adapter->msix_entries[vector + NONQ_VECS].vector,
 507                         NULL);
 508                 free_irq(adapter->msix_entries[vector + NONQ_VECS].vector,
 509                          adapter->q_vector[vector]);
 510         }
 511         return err;
 512 }
 513
 514 /**
 515  * i40evf_request_misc_irq - Initialize MSI-X interrupts
 516  * @adapter: board private structure
 517  *
 518  * Allocates MSI-X vector 0 and requests interrupts from the kernel. This
 519  * vector is only for the admin queue, and stays active even when the netdev
 520  * is closed.
 521  **/
 522 static int i40evf_request_misc_irq(struct i40evf_adapter *adapter)
 523 {
 524         struct net_device *netdev = adapter->netdev;
 525         int err;
 526
 527         snprintf(adapter->misc_vector_name,
 528                  sizeof(adapter->misc_vector_name) - 1, "i40evf-%s:mbx",
 529                  dev_name(&adapter->pdev->dev));
 530         err = request_irq(adapter->msix_entries[0].vector,
 531                           &i40evf_msix_aq, 0,
 532                           adapter->misc_vector_name, netdev);
 533         if (err) {
 534                 dev_err(&adapter->pdev->dev,
 535                         "request_irq for %s failed: %d\n",
 536                         adapter->misc_vector_name, err);
 537                 free_irq(adapter->msix_entries[0].vector, netdev);
 538         }
 539         return err;
 540 }
 541
 542 /**
 543  * i40evf_free_traffic_irqs - Free MSI-X interrupts
 544  * @adapter: board private structure
 545  *
 546  * Frees all MSI-X vectors other than 0.
 547  **/
 548 static void i40evf_free_traffic_irqs(struct i40evf_adapter *adapter)
 549 {
 550         int i;
 551         int q_vectors;
 552
 553         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 554
 555         for (i = 0; i < q_vectors; i++) {
 556                 irq_set_affinity_hint(adapter->msix_entries[i+1].vector,
 557                                       NULL);
 558                 free_irq(adapter->msix_entries[i+1].vector,
 559                          adapter->q_vector[i]);
 560         }
 561 }
 562
 563 /**
 564  * i40evf_free_misc_irq - Free MSI-X miscellaneous vector
 565  * @adapter: board private structure
 566  *
 567  * Frees MSI-X vector 0.
 568  **/
 569 static void i40evf_free_misc_irq(struct i40evf_adapter *adapter)
 570 {
 571         struct net_device *netdev = adapter->netdev;
 572
 573         free_irq(adapter->msix_entries[0].vector, netdev);
 574 }
 575
 576 /**
 577  * i40evf_configure_tx - Configure Transmit Unit after Reset
 578  * @adapter: board private structure
 579  *
 580  * Configure the Tx unit of the MAC after a reset.
 581  **/
 582 static void i40evf_configure_tx(struct i40evf_adapter *adapter)
 583 {
 584         struct i40e_hw *hw = &adapter->hw;
 585         int i;
 586
 587         for (i = 0; i < adapter->num_active_queues; 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->num_active_queues; 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 = NULL;
 668         int count = 50;
 669
 670         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 671                                 &adapter->crit_section)) {
 672                 udelay(1);
 673                 if (--count == 0)
 674                         goto out;
 675         }
 676
 677         f = i40evf_find_vlan(adapter, vlan);
 678         if (!f) {
 679                 f = kzalloc(sizeof(*f), GFP_ATOMIC);
 680                 if (!f)
 681                         goto clearout;
 682
 683                 f->vlan = vlan;
 684
 685                 INIT_LIST_HEAD(&f->list);
 686                 list_add(&f->list, &adapter->vlan_filter_list);
 687                 f->add = true;
 688                 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
 689         }
 690
 691 clearout:
 692         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 693 out:
 694         return f;
 695 }
 696
 697 /**
 698  * i40evf_del_vlan - Remove a vlan filter from the list
 699  * @adapter: board private structure
 700  * @vlan: VLAN tag
 701  **/
 702 static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan)
 703 {
 704         struct i40evf_vlan_filter *f;
 705         int count = 50;
 706
 707         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 708                                 &adapter->crit_section)) {
 709                 udelay(1);
 710                 if (--count == 0)
 711                         return;
 712         }
 713
 714         f = i40evf_find_vlan(adapter, vlan);
 715         if (f) {
 716                 f->remove = true;
 717                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
 718         }
 719         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 720 }
 721
 722 /**
 723  * i40evf_vlan_rx_add_vid - Add a VLAN filter to a device
 724  * @netdev: network device struct
 725  * @vid: VLAN tag
 726  **/
 727 static int i40evf_vlan_rx_add_vid(struct net_device *netdev,
 728                                   __always_unused __be16 proto, u16 vid)
 729 {
 730         struct i40evf_adapter *adapter = netdev_priv(netdev);
 731
 732         if (i40evf_add_vlan(adapter, vid) == NULL)
 733                 return -ENOMEM;
 734         return 0;
 735 }
 736
 737 /**
 738  * i40evf_vlan_rx_kill_vid - Remove a VLAN filter from a device
 739  * @netdev: network device struct
 740  * @vid: VLAN tag
 741  **/
 742 static int i40evf_vlan_rx_kill_vid(struct net_device *netdev,
 743                                    __always_unused __be16 proto, u16 vid)
 744 {
 745         struct i40evf_adapter *adapter = netdev_priv(netdev);
 746
 747         i40evf_del_vlan(adapter, vid);
 748         return 0;
 749 }
 750
 751 /**
 752  * i40evf_find_filter - Search filter list for specific mac filter
 753  * @adapter: board private structure
 754  * @macaddr: the MAC address
 755  *
 756  * Returns ptr to the filter object or NULL
 757  **/
 758 static struct
 759 i40evf_mac_filter *i40evf_find_filter(struct i40evf_adapter *adapter,
 760                                       u8 *macaddr)
 761 {
 762         struct i40evf_mac_filter *f;
 763
 764         if (!macaddr)
 765                 return NULL;
 766
 767         list_for_each_entry(f, &adapter->mac_filter_list, list) {
 768                 if (ether_addr_equal(macaddr, f->macaddr))
 769                         return f;
 770         }
 771         return NULL;
 772 }
 773
 774 /**
 775  * i40e_add_filter - Add a mac filter to the filter list
 776  * @adapter: board private structure
 777  * @macaddr: the MAC address
 778  *
 779  * Returns ptr to the filter object or NULL when no memory available.
 780  **/
 781 static struct
 782 i40evf_mac_filter *i40evf_add_filter(struct i40evf_adapter *adapter,
 783                                      u8 *macaddr)
 784 {
 785         struct i40evf_mac_filter *f;
 786         int count = 50;
 787
 788         if (!macaddr)
 789                 return NULL;
 790
 791         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 792                                 &adapter->crit_section)) {
 793                 udelay(1);
 794                 if (--count == 0)
 795                         return NULL;
 796         }
 797
 798         f = i40evf_find_filter(adapter, macaddr);
 799         if (!f) {
 800                 f = kzalloc(sizeof(*f), GFP_ATOMIC);
 801                 if (!f) {
 802                         clear_bit(__I40EVF_IN_CRITICAL_TASK,
 803                                   &adapter->crit_section);
 804                         return NULL;
 805                 }
 806
 807                 ether_addr_copy(f->macaddr, macaddr);
 808
 809                 list_add(&f->list, &adapter->mac_filter_list);
 810                 f->add = true;
 811                 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
 812         }
 813
 814         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 815         return f;
 816 }
 817
 818 /**
 819  * i40evf_set_mac - NDO callback to set port mac address
 820  * @netdev: network interface device structure
 821  * @p: pointer to an address structure
 822  *
 823  * Returns 0 on success, negative on failure
 824  **/
 825 static int i40evf_set_mac(struct net_device *netdev, void *p)
 826 {
 827         struct i40evf_adapter *adapter = netdev_priv(netdev);
 828         struct i40e_hw *hw = &adapter->hw;
 829         struct i40evf_mac_filter *f;
 830         struct sockaddr *addr = p;
 831
 832         if (!is_valid_ether_addr(addr->sa_data))
 833                 return -EADDRNOTAVAIL;
 834
 835         if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
 836                 return 0;
 837
 838         f = i40evf_add_filter(adapter, addr->sa_data);
 839         if (f) {
 840                 ether_addr_copy(hw->mac.addr, addr->sa_data);
 841                 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
 842         }
 843
 844         return (f == NULL) ? -ENOMEM : 0;
 845 }
 846
 847 /**
 848  * i40evf_set_rx_mode - NDO callback to set the netdev filters
 849  * @netdev: network interface device structure
 850  **/
 851 static void i40evf_set_rx_mode(struct net_device *netdev)
 852 {
 853         struct i40evf_adapter *adapter = netdev_priv(netdev);
 854         struct i40evf_mac_filter *f, *ftmp;
 855         struct netdev_hw_addr *uca;
 856         struct netdev_hw_addr *mca;
 857         int count = 50;
 858
 859         /* add addr if not already in the filter list */
 860         netdev_for_each_uc_addr(uca, netdev) {
 861                 i40evf_add_filter(adapter, uca->addr);
 862         }
 863         netdev_for_each_mc_addr(mca, netdev) {
 864                 i40evf_add_filter(adapter, mca->addr);
 865         }
 866
 867         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 868                                 &adapter->crit_section)) {
 869                 udelay(1);
 870                 if (--count == 0) {
 871                         dev_err(&adapter->pdev->dev,
 872                                 "Failed to get lock in %s\n", __func__);
 873                         return;
 874                 }
 875         }
 876         /* remove filter if not in netdev list */
 877         list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
 878                 bool found = false;
 879
 880                 if (is_multicast_ether_addr(f->macaddr)) {
 881                         netdev_for_each_mc_addr(mca, netdev) {
 882                                 if (ether_addr_equal(mca->addr, f->macaddr)) {
 883                                         found = true;
 884                                         break;
 885                                 }
 886                         }
 887                 } else {
 888                         netdev_for_each_uc_addr(uca, netdev) {
 889                                 if (ether_addr_equal(uca->addr, f->macaddr)) {
 890                                         found = true;
 891                                         break;
 892                                 }
 893                         }
 894                 }
 895                 if (found) {
 896                         f->remove = true;
 897                         adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
 898                 }
 899         }
 900         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 901 }
 902
 903 /**
 904  * i40evf_napi_enable_all - enable NAPI on all queue vectors
 905  * @adapter: board private structure
 906  **/
 907 static void i40evf_napi_enable_all(struct i40evf_adapter *adapter)
 908 {
 909         int q_idx;
 910         struct i40e_q_vector *q_vector;
 911         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 912
 913         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
 914                 struct napi_struct *napi;
 915
 916                 q_vector = adapter->q_vector[q_idx];
 917                 napi = &q_vector->napi;
 918                 napi_enable(napi);
 919         }
 920 }
 921
 922 /**
 923  * i40evf_napi_disable_all - disable NAPI on all queue vectors
 924  * @adapter: board private structure
 925  **/
 926 static void i40evf_napi_disable_all(struct i40evf_adapter *adapter)
 927 {
 928         int q_idx;
 929         struct i40e_q_vector *q_vector;
 930         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 931
 932         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
 933                 q_vector = adapter->q_vector[q_idx];
 934                 napi_disable(&q_vector->napi);
 935         }
 936 }
 937
 938 /**
 939  * i40evf_configure - set up transmit and receive data structures
 940  * @adapter: board private structure
 941  **/
 942 static void i40evf_configure(struct i40evf_adapter *adapter)
 943 {
 944         struct net_device *netdev = adapter->netdev;
 945         int i;
 946
 947         i40evf_set_rx_mode(netdev);
 948
 949         i40evf_configure_tx(adapter);
 950         i40evf_configure_rx(adapter);
 951         adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
 952
 953         for (i = 0; i < adapter->num_active_queues; i++) {
 954                 struct i40e_ring *ring = adapter->rx_rings[i];
 955
 956                 i40evf_alloc_rx_buffers_1buf(ring, ring->count);
 957                 ring->next_to_use = ring->count - 1;
 958                 writel(ring->next_to_use, ring->tail);
 959         }
 960 }
 961
 962 /**
 963  * i40evf_up_complete - Finish the last steps of bringing up a connection
 964  * @adapter: board private structure
 965  **/
 966 static int i40evf_up_complete(struct i40evf_adapter *adapter)
 967 {
 968         adapter->state = __I40EVF_RUNNING;
 969         clear_bit(__I40E_DOWN, &adapter->vsi.state);
 970
 971         i40evf_napi_enable_all(adapter);
 972
 973         adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES;
 974         mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
 975         return 0;
 976 }
 977
 978 /**
 979  * i40e_down - Shutdown the connection processing
 980  * @adapter: board private structure
 981  **/
 982 void i40evf_down(struct i40evf_adapter *adapter)
 983 {
 984         struct net_device *netdev = adapter->netdev;
 985         struct i40evf_mac_filter *f;
 986
 987         if (adapter->state == __I40EVF_DOWN)
 988                 return;
 989
 990         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 991                                 &adapter->crit_section))
 992                 usleep_range(500, 1000);
 993
 994         netif_carrier_off(netdev);
 995         netif_tx_disable(netdev);
 996         i40evf_napi_disable_all(adapter);
 997         i40evf_irq_disable(adapter);
 998
 999         /* remove all MAC filters */
1000         list_for_each_entry(f, &adapter->mac_filter_list, list) {
1001                 f->remove = true;
1002         }
1003         /* remove all VLAN filters */
1004         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
1005                 f->remove = true;
1006         }
1007         if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) &&
1008             adapter->state != __I40EVF_RESETTING) {
1009                 /* cancel any current operation */
1010                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1011                 /* Schedule operations to close down the HW. Don't wait
1012                  * here for this to complete. The watchdog is still running
1013                  * and it will take care of this.
1014                  */
1015                 adapter->aq_required = I40EVF_FLAG_AQ_DEL_MAC_FILTER;
1016                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
1017                 adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
1018         }
1019
1020         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1021 }
1022
1023 /**
1024  * i40evf_acquire_msix_vectors - Setup the MSIX capability
1025  * @adapter: board private structure
1026  * @vectors: number of vectors to request
1027  *
1028  * Work with the OS to set up the MSIX vectors needed.
1029  *
1030  * Returns 0 on success, negative on failure
1031  **/
1032 static int
1033 i40evf_acquire_msix_vectors(struct i40evf_adapter *adapter, int vectors)
1034 {
1035         int err, vector_threshold;
1036
1037         /* We'll want at least 3 (vector_threshold):
1038          * 0) Other (Admin Queue and link, mostly)
1039          * 1) TxQ[0] Cleanup
1040          * 2) RxQ[0] Cleanup
1041          */
1042         vector_threshold = MIN_MSIX_COUNT;
1043
1044         /* The more we get, the more we will assign to Tx/Rx Cleanup
1045          * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1046          * Right now, we simply care about how many we'll get; we'll
1047          * set them up later while requesting irq's.
1048          */
1049         err = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
1050                                     vector_threshold, vectors);
1051         if (err < 0) {
1052                 dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts\n");
1053                 kfree(adapter->msix_entries);
1054                 adapter->msix_entries = NULL;
1055                 return err;
1056         }
1057
1058         /* Adjust for only the vectors we'll use, which is minimum
1059          * of max_msix_q_vectors + NONQ_VECS, or the number of
1060          * vectors we were allocated.
1061          */
1062         adapter->num_msix_vectors = err;
1063         return 0;
1064 }
1065
1066 /**
1067  * i40evf_free_queues - Free memory for all rings
1068  * @adapter: board private structure to initialize
1069  *
1070  * Free all of the memory associated with queue pairs.
1071  **/
1072 static void i40evf_free_queues(struct i40evf_adapter *adapter)
1073 {
1074         int i;
1075
1076         if (!adapter->vsi_res)
1077                 return;
1078         for (i = 0; i < adapter->num_active_queues; i++) {
1079                 if (adapter->tx_rings[i])
1080                         kfree_rcu(adapter->tx_rings[i], rcu);
1081                 adapter->tx_rings[i] = NULL;
1082                 adapter->rx_rings[i] = NULL;
1083         }
1084 }
1085
1086 /**
1087  * i40evf_alloc_queues - Allocate memory for all rings
1088  * @adapter: board private structure to initialize
1089  *
1090  * We allocate one ring per queue at run-time since we don't know the
1091  * number of queues at compile-time.  The polling_netdev array is
1092  * intended for Multiqueue, but should work fine with a single queue.
1093  **/
1094 static int i40evf_alloc_queues(struct i40evf_adapter *adapter)
1095 {
1096         int i;
1097
1098         for (i = 0; i < adapter->num_active_queues; i++) {
1099                 struct i40e_ring *tx_ring;
1100                 struct i40e_ring *rx_ring;
1101
1102                 tx_ring = kzalloc(sizeof(*tx_ring) * 2, GFP_KERNEL);
1103                 if (!tx_ring)
1104                         goto err_out;
1105
1106                 tx_ring->queue_index = i;
1107                 tx_ring->netdev = adapter->netdev;
1108                 tx_ring->dev = &adapter->pdev->dev;
1109                 tx_ring->count = adapter->tx_desc_count;
1110                 adapter->tx_rings[i] = tx_ring;
1111
1112                 rx_ring = &tx_ring[1];
1113                 rx_ring->queue_index = i;
1114                 rx_ring->netdev = adapter->netdev;
1115                 rx_ring->dev = &adapter->pdev->dev;
1116                 rx_ring->count = adapter->rx_desc_count;
1117                 adapter->rx_rings[i] = rx_ring;
1118         }
1119
1120         return 0;
1121
1122 err_out:
1123         i40evf_free_queues(adapter);
1124         return -ENOMEM;
1125 }
1126
1127 /**
1128  * i40evf_set_interrupt_capability - set MSI-X or FAIL if not supported
1129  * @adapter: board private structure to initialize
1130  *
1131  * Attempt to configure the interrupts using the best available
1132  * capabilities of the hardware and the kernel.
1133  **/
1134 static int i40evf_set_interrupt_capability(struct i40evf_adapter *adapter)
1135 {
1136         int vector, v_budget;
1137         int pairs = 0;
1138         int err = 0;
1139
1140         if (!adapter->vsi_res) {
1141                 err = -EIO;
1142                 goto out;
1143         }
1144         pairs = adapter->num_active_queues;
1145
1146         /* It's easy to be greedy for MSI-X vectors, but it really
1147          * doesn't do us much good if we have a lot more vectors
1148          * than CPU's.  So let's be conservative and only ask for
1149          * (roughly) twice the number of vectors as there are CPU's.
1150          */
1151         v_budget = min_t(int, pairs, (int)(num_online_cpus() * 2)) + NONQ_VECS;
1152         v_budget = min_t(int, v_budget, (int)adapter->vf_res->max_vectors);
1153
1154         adapter->msix_entries = kcalloc(v_budget,
1155                                         sizeof(struct msix_entry), GFP_KERNEL);
1156         if (!adapter->msix_entries) {
1157                 err = -ENOMEM;
1158                 goto out;
1159         }
1160
1161         for (vector = 0; vector < v_budget; vector++)
1162                 adapter->msix_entries[vector].entry = vector;
1163
1164         i40evf_acquire_msix_vectors(adapter, v_budget);
1165
1166 out:
1167         adapter->netdev->real_num_tx_queues = pairs;
1168         return err;
1169 }
1170
1171 /**
1172  * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors
1173  * @adapter: board private structure to initialize
1174  *
1175  * We allocate one q_vector per queue interrupt.  If allocation fails we
1176  * return -ENOMEM.
1177  **/
1178 static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
1179 {
1180         int q_idx, num_q_vectors;
1181         struct i40e_q_vector *q_vector;
1182
1183         num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1184
1185         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1186                 q_vector = kzalloc(sizeof(*q_vector), GFP_KERNEL);
1187                 if (!q_vector)
1188                         goto err_out;
1189                 q_vector->adapter = adapter;
1190                 q_vector->vsi = &adapter->vsi;
1191                 q_vector->v_idx = q_idx;
1192                 netif_napi_add(adapter->netdev, &q_vector->napi,
1193                                i40evf_napi_poll, NAPI_POLL_WEIGHT);
1194                 adapter->q_vector[q_idx] = q_vector;
1195         }
1196
1197         return 0;
1198
1199 err_out:
1200         while (q_idx) {
1201                 q_idx--;
1202                 q_vector = adapter->q_vector[q_idx];
1203                 netif_napi_del(&q_vector->napi);
1204                 kfree(q_vector);
1205                 adapter->q_vector[q_idx] = NULL;
1206         }
1207         return -ENOMEM;
1208 }
1209
1210 /**
1211  * i40evf_free_q_vectors - Free memory allocated for interrupt vectors
1212  * @adapter: board private structure to initialize
1213  *
1214  * This function frees the memory allocated to the q_vectors.  In addition if
1215  * NAPI is enabled it will delete any references to the NAPI struct prior
1216  * to freeing the q_vector.
1217  **/
1218 static void i40evf_free_q_vectors(struct i40evf_adapter *adapter)
1219 {
1220         int q_idx, num_q_vectors;
1221         int napi_vectors;
1222
1223         num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1224         napi_vectors = adapter->num_active_queues;
1225
1226         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1227                 struct i40e_q_vector *q_vector = adapter->q_vector[q_idx];
1228
1229                 adapter->q_vector[q_idx] = NULL;
1230                 if (q_idx < napi_vectors)
1231                         netif_napi_del(&q_vector->napi);
1232                 kfree(q_vector);
1233         }
1234 }
1235
1236 /**
1237  * i40evf_reset_interrupt_capability - Reset MSIX setup
1238  * @adapter: board private structure
1239  *
1240  **/
1241 void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
1242 {
1243         pci_disable_msix(adapter->pdev);
1244         kfree(adapter->msix_entries);
1245         adapter->msix_entries = NULL;
1246 }
1247
1248 /**
1249  * i40evf_init_interrupt_scheme - Determine if MSIX is supported and init
1250  * @adapter: board private structure to initialize
1251  *
1252  **/
1253 int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter)
1254 {
1255         int err;
1256
1257         err = i40evf_set_interrupt_capability(adapter);
1258         if (err) {
1259                 dev_err(&adapter->pdev->dev,
1260                         "Unable to setup interrupt capabilities\n");
1261                 goto err_set_interrupt;
1262         }
1263
1264         err = i40evf_alloc_q_vectors(adapter);
1265         if (err) {
1266                 dev_err(&adapter->pdev->dev,
1267                         "Unable to allocate memory for queue vectors\n");
1268                 goto err_alloc_q_vectors;
1269         }
1270
1271         err = i40evf_alloc_queues(adapter);
1272         if (err) {
1273                 dev_err(&adapter->pdev->dev,
1274                         "Unable to allocate memory for queues\n");
1275                 goto err_alloc_queues;
1276         }
1277
1278         dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
1279                  (adapter->num_active_queues > 1) ? "Enabled" : "Disabled",
1280                  adapter->num_active_queues);
1281
1282         return 0;
1283 err_alloc_queues:
1284         i40evf_free_q_vectors(adapter);
1285 err_alloc_q_vectors:
1286         i40evf_reset_interrupt_capability(adapter);
1287 err_set_interrupt:
1288         return err;
1289 }
1290
1291 /**
1292  * i40evf_watchdog_timer - Periodic call-back timer
1293  * @data: pointer to adapter disguised as unsigned long
1294  **/
1295 static void i40evf_watchdog_timer(unsigned long data)
1296 {
1297         struct i40evf_adapter *adapter = (struct i40evf_adapter *)data;
1298
1299         schedule_work(&adapter->watchdog_task);
1300         /* timer will be rescheduled in watchdog task */
1301 }
1302
1303 /**
1304  * i40evf_watchdog_task - Periodic call-back task
1305  * @work: pointer to work_struct
1306  **/
1307 static void i40evf_watchdog_task(struct work_struct *work)
1308 {
1309         struct i40evf_adapter *adapter = container_of(work,
1310                                                       struct i40evf_adapter,
1311                                                       watchdog_task);
1312         struct i40e_hw *hw = &adapter->hw;
1313         uint32_t rstat_val;
1314
1315         if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
1316                 goto restart_watchdog;
1317
1318         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1319                 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1320                             I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1321                 if ((rstat_val == I40E_VFR_VFACTIVE) ||
1322                     (rstat_val == I40E_VFR_COMPLETED)) {
1323                         /* A chance for redemption! */
1324                         dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
1325                         adapter->state = __I40EVF_STARTUP;
1326                         adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1327                         schedule_delayed_work(&adapter->init_task, 10);
1328                         clear_bit(__I40EVF_IN_CRITICAL_TASK,
1329                                   &adapter->crit_section);
1330                         /* Don't reschedule the watchdog, since we've restarted
1331                          * the init task. When init_task contacts the PF and
1332                          * gets everything set up again, it'll restart the
1333                          * watchdog for us. Down, boy. Sit. Stay. Woof.
1334                          */
1335                         return;
1336                 }
1337                 adapter->aq_required = 0;
1338                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1339                 goto watchdog_done;
1340         }
1341
1342         if ((adapter->state < __I40EVF_DOWN) ||
1343             (adapter->flags & I40EVF_FLAG_RESET_PENDING))
1344                 goto watchdog_done;
1345
1346         /* check for reset */
1347         rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1348                     I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1349         if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) &&
1350             (rstat_val != I40E_VFR_VFACTIVE) &&
1351             (rstat_val != I40E_VFR_COMPLETED)) {
1352                 adapter->state = __I40EVF_RESETTING;
1353                 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1354                 dev_err(&adapter->pdev->dev, "Hardware reset detected\n");
1355                 schedule_work(&adapter->reset_task);
1356                 adapter->aq_required = 0;
1357                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1358                 goto watchdog_done;
1359         }
1360
1361         /* Process admin queue tasks. After init, everything gets done
1362          * here so we don't race on the admin queue.
1363          */
1364         if (adapter->current_op) {
1365                 if (!i40evf_asq_done(hw)) {
1366                         dev_dbg(&adapter->pdev->dev, "Admin queue timeout\n");
1367                         i40evf_send_api_ver(adapter);
1368                 }
1369                 goto watchdog_done;
1370         }
1371
1372         if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
1373                 i40evf_disable_queues(adapter);
1374                 goto watchdog_done;
1375         }
1376
1377         if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
1378                 i40evf_map_queues(adapter);
1379                 goto watchdog_done;
1380         }
1381
1382         if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
1383                 i40evf_add_ether_addrs(adapter);
1384                 goto watchdog_done;
1385         }
1386
1387         if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
1388                 i40evf_add_vlans(adapter);
1389                 goto watchdog_done;
1390         }
1391
1392         if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
1393                 i40evf_del_ether_addrs(adapter);
1394                 goto watchdog_done;
1395         }
1396
1397         if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
1398                 i40evf_del_vlans(adapter);
1399                 goto watchdog_done;
1400         }
1401
1402         if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
1403                 i40evf_configure_queues(adapter);
1404                 goto watchdog_done;
1405         }
1406
1407         if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
1408                 i40evf_enable_queues(adapter);
1409                 goto watchdog_done;
1410         }
1411
1412         if (adapter->state == __I40EVF_RUNNING)
1413                 i40evf_request_stats(adapter);
1414 watchdog_done:
1415         if (adapter->state == __I40EVF_RUNNING) {
1416                 i40evf_irq_enable_queues(adapter, ~0);
1417                 i40evf_fire_sw_int(adapter, 0xFF);
1418         } else {
1419                 i40evf_fire_sw_int(adapter, 0x1);
1420         }
1421
1422         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1423 restart_watchdog:
1424         if (adapter->state == __I40EVF_REMOVE)
1425                 return;
1426         if (adapter->aq_required)
1427                 mod_timer(&adapter->watchdog_timer,
1428                           jiffies + msecs_to_jiffies(20));
1429         else
1430                 mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
1431         schedule_work(&adapter->adminq_task);
1432 }
1433
1434 /**
1435  * i40evf_configure_rss - Prepare for RSS
1436  * @adapter: board private structure
1437  **/
1438 static void i40evf_configure_rss(struct i40evf_adapter *adapter)
1439 {
1440         u32 rss_key[I40E_VFQF_HKEY_MAX_INDEX + 1];
1441         struct i40e_hw *hw = &adapter->hw;
1442         u32 cqueue = 0;
1443         u32 lut = 0;
1444         int i, j;
1445         u64 hena;
1446
1447         /* Hash type is configured by the PF - we just supply the key */
1448         netdev_rss_key_fill(rss_key, sizeof(rss_key));
1449
1450         /* Fill out hash function seed */
1451         for (i = 0; i <= I40E_VFQF_HKEY_MAX_INDEX; i++)
1452                 wr32(hw, I40E_VFQF_HKEY(i), rss_key[i]);
1453
1454         /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
1455         hena = I40E_DEFAULT_RSS_HENA;
1456         wr32(hw, I40E_VFQF_HENA(0), (u32)hena);
1457         wr32(hw, I40E_VFQF_HENA(1), (u32)(hena >> 32));
1458
1459         /* Populate the LUT with max no. of queues in round robin fashion */
1460         for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++) {
1461                 lut = 0;
1462                 for (j = 0; j < 4; j++) {
1463                         if (cqueue == adapter->vsi_res->num_queue_pairs)
1464                                 cqueue = 0;
1465                         lut |= ((cqueue) << (8 * j));
1466                         cqueue++;
1467                 }
1468                 wr32(hw, I40E_VFQF_HLUT(i), lut);
1469         }
1470         i40e_flush(hw);
1471 }
1472
1473 #define I40EVF_RESET_WAIT_MS 100
1474 #define I40EVF_RESET_WAIT_COUNT 200
1475 /**
1476  * i40evf_reset_task - Call-back task to handle hardware reset
1477  * @work: pointer to work_struct
1478  *
1479  * During reset we need to shut down and reinitialize the admin queue
1480  * before we can use it to communicate with the PF again. We also clear
1481  * and reinit the rings because that context is lost as well.
1482  **/
1483 static void i40evf_reset_task(struct work_struct *work)
1484 {
1485         struct i40evf_adapter *adapter = container_of(work,
1486                                                       struct i40evf_adapter,
1487                                                       reset_task);
1488         struct net_device *netdev = adapter->netdev;
1489         struct i40e_hw *hw = &adapter->hw;
1490         struct i40evf_mac_filter *f;
1491         uint32_t rstat_val;
1492         int i = 0, err;
1493
1494         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1495                                 &adapter->crit_section))
1496                 usleep_range(500, 1000);
1497
1498         if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) {
1499                 dev_info(&adapter->pdev->dev, "Requesting reset from PF\n");
1500                 i40evf_request_reset(adapter);
1501         }
1502
1503         /* poll until we see the reset actually happen */
1504         for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1505                 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1506                             I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1507                 if ((rstat_val != I40E_VFR_VFACTIVE) &&
1508                     (rstat_val != I40E_VFR_COMPLETED))
1509                         break;
1510                 msleep(I40EVF_RESET_WAIT_MS);
1511         }
1512         if (i == I40EVF_RESET_WAIT_COUNT) {
1513                 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1514                 goto continue_reset; /* act like the reset happened */
1515         }
1516
1517         /* wait until the reset is complete and the PF is responding to us */
1518         for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1519                 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1520                             I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1521                 if ((rstat_val == I40E_VFR_VFACTIVE) ||
1522                     (rstat_val == I40E_VFR_COMPLETED))
1523                         break;
1524                 msleep(I40EVF_RESET_WAIT_MS);
1525         }
1526         if (i == I40EVF_RESET_WAIT_COUNT) {
1527                 struct i40evf_mac_filter *f, *ftmp;
1528                 struct i40evf_vlan_filter *fv, *fvtmp;
1529
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_irq_disable(adapter);
1538                         i40evf_napi_disable_all(adapter);
1539                         netif_tx_disable(netdev);
1540                         netif_tx_stop_all_queues(netdev);
1541                         netif_carrier_off(netdev);
1542                         i40evf_free_traffic_irqs(adapter);
1543                         i40evf_free_all_tx_resources(adapter);
1544                         i40evf_free_all_rx_resources(adapter);
1545                 }
1546
1547                 /* Delete all of the filters, both MAC and VLAN. */
1548                 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list,
1549                                          list) {
1550                         list_del(&f->list);
1551                         kfree(f);
1552                 }
1553                 list_for_each_entry_safe(fv, fvtmp, &adapter->vlan_filter_list,
1554                                          list) {
1555                         list_del(&fv->list);
1556                         kfree(fv);
1557                 }
1558
1559                 i40evf_free_misc_irq(adapter);
1560                 i40evf_reset_interrupt_capability(adapter);
1561                 i40evf_free_queues(adapter);
1562                 i40evf_free_q_vectors(adapter);
1563                 kfree(adapter->vf_res);
1564                 i40evf_shutdown_adminq(hw);
1565                 adapter->netdev->flags &= ~IFF_UP;
1566                 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1567                 return; /* Do not attempt to reinit. It's dead, Jim. */
1568         }
1569
1570 continue_reset:
1571         adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1572
1573         i40evf_irq_disable(adapter);
1574
1575         if (netif_running(adapter->netdev)) {
1576                 i40evf_napi_disable_all(adapter);
1577                 netif_tx_disable(netdev);
1578                 netif_tx_stop_all_queues(netdev);
1579                 netif_carrier_off(netdev);
1580         }
1581
1582         adapter->state = __I40EVF_RESETTING;
1583
1584         /* kill and reinit the admin queue */
1585         if (i40evf_shutdown_adminq(hw))
1586                 dev_warn(&adapter->pdev->dev, "Failed to shut down adminq\n");
1587         adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1588         err = i40evf_init_adminq(hw);
1589         if (err)
1590                 dev_info(&adapter->pdev->dev, "Failed to init adminq: %d\n",
1591                          err);
1592
1593         i40evf_map_queues(adapter);
1594
1595         /* re-add all MAC filters */
1596         list_for_each_entry(f, &adapter->mac_filter_list, list) {
1597                 f->add = true;
1598         }
1599         /* re-add all VLAN filters */
1600         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
1601                 f->add = true;
1602         }
1603         adapter->aq_required = I40EVF_FLAG_AQ_ADD_MAC_FILTER;
1604         adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
1605         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1606
1607         mod_timer(&adapter->watchdog_timer, jiffies + 2);
1608
1609         if (netif_running(adapter->netdev)) {
1610                 /* allocate transmit descriptors */
1611                 err = i40evf_setup_all_tx_resources(adapter);
1612                 if (err)
1613                         goto reset_err;
1614
1615                 /* allocate receive descriptors */
1616                 err = i40evf_setup_all_rx_resources(adapter);
1617                 if (err)
1618                         goto reset_err;
1619
1620                 i40evf_configure(adapter);
1621
1622                 err = i40evf_up_complete(adapter);
1623                 if (err)
1624                         goto reset_err;
1625
1626                 i40evf_irq_enable(adapter, true);
1627         }
1628         return;
1629 reset_err:
1630         dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
1631         i40evf_close(adapter->netdev);
1632 }
1633
1634 /**
1635  * i40evf_adminq_task - worker thread to clean the admin queue
1636  * @work: pointer to work_struct containing our data
1637  **/
1638 static void i40evf_adminq_task(struct work_struct *work)
1639 {
1640         struct i40evf_adapter *adapter =
1641                 container_of(work, struct i40evf_adapter, adminq_task);
1642         struct i40e_hw *hw = &adapter->hw;
1643         struct i40e_arq_event_info event;
1644         struct i40e_virtchnl_msg *v_msg;
1645         i40e_status ret;
1646         u32 val, oldval;
1647         u16 pending;
1648
1649         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
1650                 goto out;
1651
1652         event.buf_len = I40EVF_MAX_AQ_BUF_SIZE;
1653         event.msg_buf = kzalloc(event.buf_len, GFP_KERNEL);
1654         if (!event.msg_buf)
1655                 goto out;
1656
1657         v_msg = (struct i40e_virtchnl_msg *)&event.desc;
1658         do {
1659                 ret = i40evf_clean_arq_element(hw, &event, &pending);
1660                 if (ret || !v_msg->v_opcode)
1661                         break; /* No event to process or error cleaning ARQ */
1662
1663                 i40evf_virtchnl_completion(adapter, v_msg->v_opcode,
1664                                            v_msg->v_retval, event.msg_buf,
1665                                            event.msg_len);
1666                 if (pending != 0)
1667                         memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
1668         } while (pending);
1669
1670         /* check for error indications */
1671         val = rd32(hw, hw->aq.arq.len);
1672         oldval = val;
1673         if (val & I40E_VF_ARQLEN_ARQVFE_MASK) {
1674                 dev_info(&adapter->pdev->dev, "ARQ VF Error detected\n");
1675                 val &= ~I40E_VF_ARQLEN_ARQVFE_MASK;
1676         }
1677         if (val & I40E_VF_ARQLEN_ARQOVFL_MASK) {
1678                 dev_info(&adapter->pdev->dev, "ARQ Overflow Error detected\n");
1679                 val &= ~I40E_VF_ARQLEN_ARQOVFL_MASK;
1680         }
1681         if (val & I40E_VF_ARQLEN_ARQCRIT_MASK) {
1682                 dev_info(&adapter->pdev->dev, "ARQ Critical Error detected\n");
1683                 val &= ~I40E_VF_ARQLEN_ARQCRIT_MASK;
1684         }
1685         if (oldval != val)
1686                 wr32(hw, hw->aq.arq.len, val);
1687
1688         val = rd32(hw, hw->aq.asq.len);
1689         oldval = val;
1690         if (val & I40E_VF_ATQLEN_ATQVFE_MASK) {
1691                 dev_info(&adapter->pdev->dev, "ASQ VF Error detected\n");
1692                 val &= ~I40E_VF_ATQLEN_ATQVFE_MASK;
1693         }
1694         if (val & I40E_VF_ATQLEN_ATQOVFL_MASK) {
1695                 dev_info(&adapter->pdev->dev, "ASQ Overflow Error detected\n");
1696                 val &= ~I40E_VF_ATQLEN_ATQOVFL_MASK;
1697         }
1698         if (val & I40E_VF_ATQLEN_ATQCRIT_MASK) {
1699                 dev_info(&adapter->pdev->dev, "ASQ Critical Error detected\n");
1700                 val &= ~I40E_VF_ATQLEN_ATQCRIT_MASK;
1701         }
1702         if (oldval != val)
1703                 wr32(hw, hw->aq.asq.len, val);
1704
1705         kfree(event.msg_buf);
1706 out:
1707         /* re-enable Admin queue interrupt cause */
1708         i40evf_misc_irq_enable(adapter);
1709 }
1710
1711 /**
1712  * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
1713  * @adapter: board private structure
1714  *
1715  * Free all transmit software resources
1716  **/
1717 void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
1718 {
1719         int i;
1720
1721         for (i = 0; i < adapter->num_active_queues; i++)
1722                 if (adapter->tx_rings[i]->desc)
1723                         i40evf_free_tx_resources(adapter->tx_rings[i]);
1724 }
1725
1726 /**
1727  * i40evf_setup_all_tx_resources - allocate all queues Tx 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_tx_resources(struct i40evf_adapter *adapter)
1737 {
1738         int i, err = 0;
1739
1740         for (i = 0; i < adapter->num_active_queues; i++) {
1741                 adapter->tx_rings[i]->count = adapter->tx_desc_count;
1742                 err = i40evf_setup_tx_descriptors(adapter->tx_rings[i]);
1743                 if (!err)
1744                         continue;
1745                 dev_err(&adapter->pdev->dev,
1746                         "%s: Allocation for Tx Queue %u failed\n",
1747                         __func__, i);
1748                 break;
1749         }
1750
1751         return err;
1752 }
1753
1754 /**
1755  * i40evf_setup_all_rx_resources - allocate all queues Rx resources
1756  * @adapter: board private structure
1757  *
1758  * If this function returns with an error, then it's possible one or
1759  * more of the rings is populated (while the rest are not).  It is the
1760  * callers duty to clean those orphaned rings.
1761  *
1762  * Return 0 on success, negative on failure
1763  **/
1764 static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter)
1765 {
1766         int i, err = 0;
1767
1768         for (i = 0; i < adapter->num_active_queues; i++) {
1769                 adapter->rx_rings[i]->count = adapter->rx_desc_count;
1770                 err = i40evf_setup_rx_descriptors(adapter->rx_rings[i]);
1771                 if (!err)
1772                         continue;
1773                 dev_err(&adapter->pdev->dev,
1774                         "%s: Allocation for Rx Queue %u failed\n",
1775                         __func__, i);
1776                 break;
1777         }
1778         return err;
1779 }
1780
1781 /**
1782  * i40evf_free_all_rx_resources - Free Rx Resources for All Queues
1783  * @adapter: board private structure
1784  *
1785  * Free all receive software resources
1786  **/
1787 void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
1788 {
1789         int i;
1790
1791         for (i = 0; i < adapter->num_active_queues; i++)
1792                 if (adapter->rx_rings[i]->desc)
1793                         i40evf_free_rx_resources(adapter->rx_rings[i]);
1794 }
1795
1796 /**
1797  * i40evf_open - Called when a network interface is made active
1798  * @netdev: network interface device structure
1799  *
1800  * Returns 0 on success, negative value on failure
1801  *
1802  * The open entry point is called when a network interface is made
1803  * active by the system (IFF_UP).  At this point all resources needed
1804  * for transmit and receive operations are allocated, the interrupt
1805  * handler is registered with the OS, the watchdog timer is started,
1806  * and the stack is notified that the interface is ready.
1807  **/
1808 static int i40evf_open(struct net_device *netdev)
1809 {
1810         struct i40evf_adapter *adapter = netdev_priv(netdev);
1811         int err;
1812
1813         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1814                 dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
1815                 return -EIO;
1816         }
1817         if (adapter->state != __I40EVF_DOWN || adapter->aq_required)
1818                 return -EBUSY;
1819
1820         /* allocate transmit descriptors */
1821         err = i40evf_setup_all_tx_resources(adapter);
1822         if (err)
1823                 goto err_setup_tx;
1824
1825         /* allocate receive descriptors */
1826         err = i40evf_setup_all_rx_resources(adapter);
1827         if (err)
1828                 goto err_setup_rx;
1829
1830         /* clear any pending interrupts, may auto mask */
1831         err = i40evf_request_traffic_irqs(adapter, netdev->name);
1832         if (err)
1833                 goto err_req_irq;
1834
1835         i40evf_configure(adapter);
1836
1837         err = i40evf_up_complete(adapter);
1838         if (err)
1839                 goto err_req_irq;
1840
1841         i40evf_irq_enable(adapter, true);
1842
1843         return 0;
1844
1845 err_req_irq:
1846         i40evf_down(adapter);
1847         i40evf_free_traffic_irqs(adapter);
1848 err_setup_rx:
1849         i40evf_free_all_rx_resources(adapter);
1850 err_setup_tx:
1851         i40evf_free_all_tx_resources(adapter);
1852
1853         return err;
1854 }
1855
1856 /**
1857  * i40evf_close - Disables a network interface
1858  * @netdev: network interface device structure
1859  *
1860  * Returns 0, this is not allowed to fail
1861  *
1862  * The close entry point is called when an interface is de-activated
1863  * by the OS.  The hardware is still under the drivers control, but
1864  * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
1865  * are freed, along with all transmit and receive resources.
1866  **/
1867 static int i40evf_close(struct net_device *netdev)
1868 {
1869         struct i40evf_adapter *adapter = netdev_priv(netdev);
1870
1871         if (adapter->state <= __I40EVF_DOWN)
1872                 return 0;
1873
1874
1875         set_bit(__I40E_DOWN, &adapter->vsi.state);
1876
1877         i40evf_down(adapter);
1878         adapter->state = __I40EVF_DOWN;
1879         i40evf_free_traffic_irqs(adapter);
1880
1881         return 0;
1882 }
1883
1884 /**
1885  * i40evf_get_stats - Get System Network Statistics
1886  * @netdev: network interface device structure
1887  *
1888  * Returns the address of the device statistics structure.
1889  * The statistics are actually updated from the timer callback.
1890  **/
1891 static struct net_device_stats *i40evf_get_stats(struct net_device *netdev)
1892 {
1893         struct i40evf_adapter *adapter = netdev_priv(netdev);
1894
1895         /* only return the current stats */
1896         return &adapter->net_stats;
1897 }
1898
1899 /**
1900  * i40evf_reinit_locked - Software reinit
1901  * @adapter: board private structure
1902  *
1903  * Reinititalizes the ring structures in response to a software configuration
1904  * change. Roughly the same as close followed by open, but skips releasing
1905  * and reallocating the interrupts.
1906  **/
1907 void i40evf_reinit_locked(struct i40evf_adapter *adapter)
1908 {
1909         struct net_device *netdev = adapter->netdev;
1910         int err;
1911
1912         WARN_ON(in_interrupt());
1913
1914         i40evf_down(adapter);
1915
1916         /* allocate transmit descriptors */
1917         err = i40evf_setup_all_tx_resources(adapter);
1918         if (err)
1919                 goto err_reinit;
1920
1921         /* allocate receive descriptors */
1922         err = i40evf_setup_all_rx_resources(adapter);
1923         if (err)
1924                 goto err_reinit;
1925
1926         i40evf_configure(adapter);
1927
1928         err = i40evf_up_complete(adapter);
1929         if (err)
1930                 goto err_reinit;
1931
1932         i40evf_irq_enable(adapter, true);
1933         return;
1934
1935 err_reinit:
1936         dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
1937         i40evf_close(netdev);
1938 }
1939
1940 /**
1941  * i40evf_change_mtu - Change the Maximum Transfer Unit
1942  * @netdev: network interface device structure
1943  * @new_mtu: new value for maximum frame size
1944  *
1945  * Returns 0 on success, negative on failure
1946  **/
1947 static int i40evf_change_mtu(struct net_device *netdev, int new_mtu)
1948 {
1949         struct i40evf_adapter *adapter = netdev_priv(netdev);
1950         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
1951
1952         if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
1953                 return -EINVAL;
1954
1955         /* must set new MTU before calling down or up */
1956         netdev->mtu = new_mtu;
1957         i40evf_reinit_locked(adapter);
1958         return 0;
1959 }
1960
1961 static const struct net_device_ops i40evf_netdev_ops = {
1962         .ndo_open               = i40evf_open,
1963         .ndo_stop               = i40evf_close,
1964         .ndo_start_xmit         = i40evf_xmit_frame,
1965         .ndo_get_stats          = i40evf_get_stats,
1966         .ndo_set_rx_mode        = i40evf_set_rx_mode,
1967         .ndo_validate_addr      = eth_validate_addr,
1968         .ndo_set_mac_address    = i40evf_set_mac,
1969         .ndo_change_mtu         = i40evf_change_mtu,
1970         .ndo_tx_timeout         = i40evf_tx_timeout,
1971         .ndo_vlan_rx_add_vid    = i40evf_vlan_rx_add_vid,
1972         .ndo_vlan_rx_kill_vid   = i40evf_vlan_rx_kill_vid,
1973 };
1974
1975 /**
1976  * i40evf_check_reset_complete - check that VF reset is complete
1977  * @hw: pointer to hw struct
1978  *
1979  * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
1980  **/
1981 static int i40evf_check_reset_complete(struct i40e_hw *hw)
1982 {
1983         u32 rstat;
1984         int i;
1985
1986         for (i = 0; i < 100; i++) {
1987                 rstat = rd32(hw, I40E_VFGEN_RSTAT) &
1988                             I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1989                 if ((rstat == I40E_VFR_VFACTIVE) ||
1990                     (rstat == I40E_VFR_COMPLETED))
1991                         return 0;
1992                 usleep_range(10, 20);
1993         }
1994         return -EBUSY;
1995 }
1996
1997 /**
1998  * i40evf_init_task - worker thread to perform delayed initialization
1999  * @work: pointer to work_struct containing our data
2000  *
2001  * This task completes the work that was begun in probe. Due to the nature
2002  * of VF-PF communications, we may need to wait tens of milliseconds to get
2003  * responses back from the PF. Rather than busy-wait in probe and bog down the
2004  * whole system, we'll do it in a task so we can sleep.
2005  * This task only runs during driver init. Once we've established
2006  * communications with the PF driver and set up our netdev, the watchdog
2007  * takes over.
2008  **/
2009 static void i40evf_init_task(struct work_struct *work)
2010 {
2011         struct i40evf_adapter *adapter = container_of(work,
2012                                                       struct i40evf_adapter,
2013                                                       init_task.work);
2014         struct net_device *netdev = adapter->netdev;
2015         struct i40evf_mac_filter *f;
2016         struct i40e_hw *hw = &adapter->hw;
2017         struct pci_dev *pdev = adapter->pdev;
2018         int i, err, bufsz;
2019
2020         switch (adapter->state) {
2021         case __I40EVF_STARTUP:
2022                 /* driver loaded, probe complete */
2023                 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
2024                 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
2025                 err = i40e_set_mac_type(hw);
2026                 if (err) {
2027                         dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
2028                                 err);
2029                         goto err;
2030                 }
2031                 err = i40evf_check_reset_complete(hw);
2032                 if (err) {
2033                         dev_info(&pdev->dev, "Device is still in reset (%d), retrying\n",
2034                                  err);
2035                         goto err;
2036                 }
2037                 hw->aq.num_arq_entries = I40EVF_AQ_LEN;
2038                 hw->aq.num_asq_entries = I40EVF_AQ_LEN;
2039                 hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2040                 hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2041
2042                 err = i40evf_init_adminq(hw);
2043                 if (err) {
2044                         dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
2045                                 err);
2046                         goto err;
2047                 }
2048                 err = i40evf_send_api_ver(adapter);
2049                 if (err) {
2050                         dev_err(&pdev->dev, "Unable to send to PF (%d)\n", err);
2051                         i40evf_shutdown_adminq(hw);
2052                         goto err;
2053                 }
2054                 adapter->state = __I40EVF_INIT_VERSION_CHECK;
2055                 goto restart;
2056         case __I40EVF_INIT_VERSION_CHECK:
2057                 if (!i40evf_asq_done(hw)) {
2058                         dev_err(&pdev->dev, "Admin queue command never completed\n");
2059                         i40evf_shutdown_adminq(hw);
2060                         adapter->state = __I40EVF_STARTUP;
2061                         goto err;
2062                 }
2063
2064                 /* aq msg sent, awaiting reply */
2065                 err = i40evf_verify_api_ver(adapter);
2066                 if (err) {
2067                         if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
2068                                 err = i40evf_send_api_ver(adapter);
2069                         goto err;
2070                 }
2071                 err = i40evf_send_vf_config_msg(adapter);
2072                 if (err) {
2073                         dev_err(&pdev->dev, "Unable to send config request (%d)\n",
2074                                 err);
2075                         goto err;
2076                 }
2077                 adapter->state = __I40EVF_INIT_GET_RESOURCES;
2078                 goto restart;
2079         case __I40EVF_INIT_GET_RESOURCES:
2080                 /* aq msg sent, awaiting reply */
2081                 if (!adapter->vf_res) {
2082                         bufsz = sizeof(struct i40e_virtchnl_vf_resource) +
2083                                 (I40E_MAX_VF_VSI *
2084                                  sizeof(struct i40e_virtchnl_vsi_resource));
2085                         adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
2086                         if (!adapter->vf_res)
2087                                 goto err;
2088                 }
2089                 err = i40evf_get_vf_config(adapter);
2090                 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK) {
2091                         err = i40evf_send_vf_config_msg(adapter);
2092                         goto err;
2093                 }
2094                 if (err) {
2095                         dev_err(&pdev->dev, "Unable to get VF config (%d)\n",
2096                                 err);
2097                         goto err_alloc;
2098                 }
2099                 adapter->state = __I40EVF_INIT_SW;
2100                 break;
2101         default:
2102                 goto err_alloc;
2103         }
2104         /* got VF config message back from PF, now we can parse it */
2105         for (i = 0; i < adapter->vf_res->num_vsis; i++) {
2106                 if (adapter->vf_res->vsi_res[i].vsi_type == I40E_VSI_SRIOV)
2107                         adapter->vsi_res = &adapter->vf_res->vsi_res[i];
2108         }
2109         if (!adapter->vsi_res) {
2110                 dev_err(&pdev->dev, "No LAN VSI found\n");
2111                 goto err_alloc;
2112         }
2113
2114         adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
2115
2116         netdev->netdev_ops = &i40evf_netdev_ops;
2117         i40evf_set_ethtool_ops(netdev);
2118         netdev->watchdog_timeo = 5 * HZ;
2119         netdev->features |= NETIF_F_HIGHDMA |
2120                             NETIF_F_SG |
2121                             NETIF_F_IP_CSUM |
2122                             NETIF_F_SCTP_CSUM |
2123                             NETIF_F_IPV6_CSUM |
2124                             NETIF_F_TSO |
2125                             NETIF_F_TSO6 |
2126                             NETIF_F_RXCSUM |
2127                             NETIF_F_GRO;
2128
2129         if (adapter->vf_res->vf_offload_flags
2130             & I40E_VIRTCHNL_VF_OFFLOAD_VLAN) {
2131                 netdev->vlan_features = netdev->features;
2132                 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX |
2133                                     NETIF_F_HW_VLAN_CTAG_RX |
2134                                     NETIF_F_HW_VLAN_CTAG_FILTER;
2135         }
2136
2137         /* copy netdev features into list of user selectable features */
2138         netdev->hw_features |= netdev->features;
2139         netdev->hw_features &= ~NETIF_F_RXCSUM;
2140
2141         if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
2142                 dev_info(&pdev->dev, "Invalid MAC address %pM, using random\n",
2143                          adapter->hw.mac.addr);
2144                 random_ether_addr(adapter->hw.mac.addr);
2145         }
2146         ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
2147         ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
2148
2149         f = kzalloc(sizeof(*f), GFP_ATOMIC);
2150         if (!f)
2151                 goto err_sw_init;
2152
2153         ether_addr_copy(f->macaddr, adapter->hw.mac.addr);
2154         f->add = true;
2155         adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
2156
2157         list_add(&f->list, &adapter->mac_filter_list);
2158
2159         init_timer(&adapter->watchdog_timer);
2160         adapter->watchdog_timer.function = &i40evf_watchdog_timer;
2161         adapter->watchdog_timer.data = (unsigned long)adapter;
2162         mod_timer(&adapter->watchdog_timer, jiffies + 1);
2163
2164         adapter->num_active_queues = min_t(int,
2165                                            adapter->vsi_res->num_queue_pairs,
2166                                            (int)(num_online_cpus()));
2167         adapter->tx_desc_count = I40EVF_DEFAULT_TXD;
2168         adapter->rx_desc_count = I40EVF_DEFAULT_RXD;
2169         err = i40evf_init_interrupt_scheme(adapter);
2170         if (err)
2171                 goto err_sw_init;
2172         i40evf_map_rings_to_vectors(adapter);
2173         i40evf_configure_rss(adapter);
2174         err = i40evf_request_misc_irq(adapter);
2175         if (err)
2176                 goto err_sw_init;
2177
2178         netif_carrier_off(netdev);
2179
2180         adapter->vsi.id = adapter->vsi_res->vsi_id;
2181         adapter->vsi.seid = adapter->vsi_res->vsi_id; /* dummy */
2182         adapter->vsi.back = adapter;
2183         adapter->vsi.base_vector = 1;
2184         adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
2185         adapter->vsi.rx_itr_setting = (I40E_ITR_DYNAMIC |
2186                                        ITR_REG_TO_USEC(I40E_ITR_RX_DEF));
2187         adapter->vsi.tx_itr_setting = (I40E_ITR_DYNAMIC |
2188                                        ITR_REG_TO_USEC(I40E_ITR_TX_DEF));
2189         adapter->vsi.netdev = adapter->netdev;
2190
2191         if (!adapter->netdev_registered) {
2192                 err = register_netdev(netdev);
2193                 if (err)
2194                         goto err_register;
2195         }
2196
2197         adapter->netdev_registered = true;
2198
2199         netif_tx_stop_all_queues(netdev);
2200
2201         dev_info(&pdev->dev, "MAC address: %pM\n", adapter->hw.mac.addr);
2202         if (netdev->features & NETIF_F_GRO)
2203                 dev_info(&pdev->dev, "GRO is enabled\n");
2204
2205         dev_info(&pdev->dev, "%s\n", i40evf_driver_string);
2206         adapter->state = __I40EVF_DOWN;
2207         set_bit(__I40E_DOWN, &adapter->vsi.state);
2208         i40evf_misc_irq_enable(adapter);
2209         return;
2210 restart:
2211         schedule_delayed_work(&adapter->init_task,
2212                               msecs_to_jiffies(50));
2213         return;
2214
2215 err_register:
2216         i40evf_free_misc_irq(adapter);
2217 err_sw_init:
2218         i40evf_reset_interrupt_capability(adapter);
2219 err_alloc:
2220         kfree(adapter->vf_res);
2221         adapter->vf_res = NULL;
2222 err:
2223         /* Things went into the weeds, so try again later */
2224         if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
2225                 dev_err(&pdev->dev, "Failed to communicate with PF; giving up\n");
2226                 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
2227                 return; /* do not reschedule */
2228         }
2229         schedule_delayed_work(&adapter->init_task, HZ * 3);
2230 }
2231
2232 /**
2233  * i40evf_shutdown - Shutdown the device in preparation for a reboot
2234  * @pdev: pci device structure
2235  **/
2236 static void i40evf_shutdown(struct pci_dev *pdev)
2237 {
2238         struct net_device *netdev = pci_get_drvdata(pdev);
2239         struct i40evf_adapter *adapter = netdev_priv(netdev);
2240
2241         netif_device_detach(netdev);
2242
2243         if (netif_running(netdev))
2244                 i40evf_close(netdev);
2245
2246         /* Prevent the watchdog from running. */
2247         adapter->state = __I40EVF_REMOVE;
2248         adapter->aq_required = 0;
2249
2250 #ifdef CONFIG_PM
2251         pci_save_state(pdev);
2252
2253 #endif
2254         pci_disable_device(pdev);
2255 }
2256
2257 /**
2258  * i40evf_probe - Device Initialization Routine
2259  * @pdev: PCI device information struct
2260  * @ent: entry in i40evf_pci_tbl
2261  *
2262  * Returns 0 on success, negative on failure
2263  *
2264  * i40evf_probe initializes an adapter identified by a pci_dev structure.
2265  * The OS initialization, configuring of the adapter private structure,
2266  * and a hardware reset occur.
2267  **/
2268 static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2269 {
2270         struct net_device *netdev;
2271         struct i40evf_adapter *adapter = NULL;
2272         struct i40e_hw *hw = NULL;
2273         int err;
2274
2275         err = pci_enable_device(pdev);
2276         if (err)
2277                 return err;
2278
2279         err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
2280         if (err) {
2281                 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2282                 if (err) {
2283                         dev_err(&pdev->dev,
2284                                 "DMA configuration failed: 0x%x\n", err);
2285                         goto err_dma;
2286                 }
2287         }
2288
2289         err = pci_request_regions(pdev, i40evf_driver_name);
2290         if (err) {
2291                 dev_err(&pdev->dev,
2292                         "pci_request_regions failed 0x%x\n", err);
2293                 goto err_pci_reg;
2294         }
2295
2296         pci_enable_pcie_error_reporting(pdev);
2297
2298         pci_set_master(pdev);
2299
2300         netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter),
2301                                    MAX_TX_QUEUES);
2302         if (!netdev) {
2303                 err = -ENOMEM;
2304                 goto err_alloc_etherdev;
2305         }
2306
2307         SET_NETDEV_DEV(netdev, &pdev->dev);
2308
2309         pci_set_drvdata(pdev, netdev);
2310         adapter = netdev_priv(netdev);
2311
2312         adapter->netdev = netdev;
2313         adapter->pdev = pdev;
2314
2315         hw = &adapter->hw;
2316         hw->back = adapter;
2317
2318         adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
2319         adapter->state = __I40EVF_STARTUP;
2320
2321         /* Call save state here because it relies on the adapter struct. */
2322         pci_save_state(pdev);
2323
2324         hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
2325                               pci_resource_len(pdev, 0));
2326         if (!hw->hw_addr) {
2327                 err = -EIO;
2328                 goto err_ioremap;
2329         }
2330         hw->vendor_id = pdev->vendor;
2331         hw->device_id = pdev->device;
2332         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2333         hw->subsystem_vendor_id = pdev->subsystem_vendor;
2334         hw->subsystem_device_id = pdev->subsystem_device;
2335         hw->bus.device = PCI_SLOT(pdev->devfn);
2336         hw->bus.func = PCI_FUNC(pdev->devfn);
2337
2338         INIT_LIST_HEAD(&adapter->mac_filter_list);
2339         INIT_LIST_HEAD(&adapter->vlan_filter_list);
2340
2341         INIT_WORK(&adapter->reset_task, i40evf_reset_task);
2342         INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
2343         INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
2344         INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
2345         schedule_delayed_work(&adapter->init_task, 10);
2346
2347         return 0;
2348
2349 err_ioremap:
2350         free_netdev(netdev);
2351 err_alloc_etherdev:
2352         pci_release_regions(pdev);
2353 err_pci_reg:
2354 err_dma:
2355         pci_disable_device(pdev);
2356         return err;
2357 }
2358
2359 #ifdef CONFIG_PM
2360 /**
2361  * i40evf_suspend - Power management suspend routine
2362  * @pdev: PCI device information struct
2363  * @state: unused
2364  *
2365  * Called when the system (VM) is entering sleep/suspend.
2366  **/
2367 static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
2368 {
2369         struct net_device *netdev = pci_get_drvdata(pdev);
2370         struct i40evf_adapter *adapter = netdev_priv(netdev);
2371         int retval = 0;
2372
2373         netif_device_detach(netdev);
2374
2375         if (netif_running(netdev)) {
2376                 rtnl_lock();
2377                 i40evf_down(adapter);
2378                 rtnl_unlock();
2379         }
2380         i40evf_free_misc_irq(adapter);
2381         i40evf_reset_interrupt_capability(adapter);
2382
2383         retval = pci_save_state(pdev);
2384         if (retval)
2385                 return retval;
2386
2387         pci_disable_device(pdev);
2388
2389         return 0;
2390 }
2391
2392 /**
2393  * i40evf_resume - Power management resume routine
2394  * @pdev: PCI device information struct
2395  *
2396  * Called when the system (VM) is resumed from sleep/suspend.
2397  **/
2398 static int i40evf_resume(struct pci_dev *pdev)
2399 {
2400         struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
2401         struct net_device *netdev = adapter->netdev;
2402         u32 err;
2403
2404         pci_set_power_state(pdev, PCI_D0);
2405         pci_restore_state(pdev);
2406         /* pci_restore_state clears dev->state_saved so call
2407          * pci_save_state to restore it.
2408          */
2409         pci_save_state(pdev);
2410
2411         err = pci_enable_device_mem(pdev);
2412         if (err) {
2413                 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
2414                 return err;
2415         }
2416         pci_set_master(pdev);
2417
2418         rtnl_lock();
2419         err = i40evf_set_interrupt_capability(adapter);
2420         if (err) {
2421                 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
2422                 return err;
2423         }
2424         err = i40evf_request_misc_irq(adapter);
2425         rtnl_unlock();
2426         if (err) {
2427                 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
2428                 return err;
2429         }
2430
2431         schedule_work(&adapter->reset_task);
2432
2433         netif_device_attach(netdev);
2434
2435         return err;
2436 }
2437
2438 #endif /* CONFIG_PM */
2439 /**
2440  * i40evf_remove - Device Removal Routine
2441  * @pdev: PCI device information struct
2442  *
2443  * i40evf_remove is called by the PCI subsystem to alert the driver
2444  * that it should release a PCI device.  The could be caused by a
2445  * Hot-Plug event, or because the driver is going to be removed from
2446  * memory.
2447  **/
2448 static void i40evf_remove(struct pci_dev *pdev)
2449 {
2450         struct net_device *netdev = pci_get_drvdata(pdev);
2451         struct i40evf_adapter *adapter = netdev_priv(netdev);
2452         struct i40evf_mac_filter *f, *ftmp;
2453         struct i40e_hw *hw = &adapter->hw;
2454
2455         cancel_delayed_work_sync(&adapter->init_task);
2456         cancel_work_sync(&adapter->reset_task);
2457
2458         if (adapter->netdev_registered) {
2459                 unregister_netdev(netdev);
2460                 adapter->netdev_registered = false;
2461         }
2462
2463         /* Shut down all the garbage mashers on the detention level */
2464         adapter->state = __I40EVF_REMOVE;
2465         adapter->aq_required = 0;
2466         i40evf_request_reset(adapter);
2467         msleep(20);
2468         /* If the FW isn't responding, kick it once, but only once. */
2469         if (!i40evf_asq_done(hw)) {
2470                 i40evf_request_reset(adapter);
2471                 msleep(20);
2472         }
2473
2474         if (adapter->msix_entries) {
2475                 i40evf_misc_irq_disable(adapter);
2476                 i40evf_free_misc_irq(adapter);
2477                 i40evf_reset_interrupt_capability(adapter);
2478                 i40evf_free_q_vectors(adapter);
2479         }
2480
2481         if (adapter->watchdog_timer.function)
2482                 del_timer_sync(&adapter->watchdog_timer);
2483
2484         flush_scheduled_work();
2485
2486         if (hw->aq.asq.count)
2487                 i40evf_shutdown_adminq(hw);
2488
2489         iounmap(hw->hw_addr);
2490         pci_release_regions(pdev);
2491
2492         i40evf_free_all_tx_resources(adapter);
2493         i40evf_free_all_rx_resources(adapter);
2494         i40evf_free_queues(adapter);
2495         kfree(adapter->vf_res);
2496         /* If we got removed before an up/down sequence, we've got a filter
2497          * hanging out there that we need to get rid of.
2498          */
2499         list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
2500                 list_del(&f->list);
2501                 kfree(f);
2502         }
2503         list_for_each_entry_safe(f, ftmp, &adapter->vlan_filter_list, list) {
2504                 list_del(&f->list);
2505                 kfree(f);
2506         }
2507
2508         free_netdev(netdev);
2509
2510         pci_disable_pcie_error_reporting(pdev);
2511
2512         pci_disable_device(pdev);
2513 }
2514
2515 static struct pci_driver i40evf_driver = {
2516         .name     = i40evf_driver_name,
2517         .id_table = i40evf_pci_tbl,
2518         .probe    = i40evf_probe,
2519         .remove   = i40evf_remove,
2520 #ifdef CONFIG_PM
2521         .suspend  = i40evf_suspend,
2522         .resume   = i40evf_resume,
2523 #endif
2524         .shutdown = i40evf_shutdown,
2525 };
2526
2527 /**
2528  * i40e_init_module - Driver Registration Routine
2529  *
2530  * i40e_init_module is the first routine called when the driver is
2531  * loaded. All it does is register with the PCI subsystem.
2532  **/
2533 static int __init i40evf_init_module(void)
2534 {
2535         int ret;
2536
2537         pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
2538                 i40evf_driver_version);
2539
2540         pr_info("%s\n", i40evf_copyright);
2541
2542         ret = pci_register_driver(&i40evf_driver);
2543         return ret;
2544 }
2545
2546 module_init(i40evf_init_module);
2547
2548 /**
2549  * i40e_exit_module - Driver Exit Cleanup Routine
2550  *
2551  * i40e_exit_module is called just before the driver is removed
2552  * from memory.
2553  **/
2554 static void __exit i40evf_exit_module(void)
2555 {
2556         pci_unregister_driver(&i40evf_driver);
2557 }
2558
2559 module_exit(i40evf_exit_module);
2560
2561 /* i40evf_main.c */