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                                 I40EVF_FLAG_RESET_NEEDED))) {
 175                 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
 176                 schedule_work(&adapter->reset_task);
 177         }
 178 }
 179
 180 /**
 181  * i40evf_misc_irq_disable - Mask off interrupt generation on the NIC
 182  * @adapter: board private structure
 183  **/
 184 static void i40evf_misc_irq_disable(struct i40evf_adapter *adapter)
 185 {
 186         struct i40e_hw *hw = &adapter->hw;
 187
 188         wr32(hw, I40E_VFINT_DYN_CTL01, 0);
 189
 190         /* read flush */
 191         rd32(hw, I40E_VFGEN_RSTAT);
 192
 193         synchronize_irq(adapter->msix_entries[0].vector);
 194 }
 195
 196 /**
 197  * i40evf_misc_irq_enable - Enable default interrupt generation settings
 198  * @adapter: board private structure
 199  **/
 200 static void i40evf_misc_irq_enable(struct i40evf_adapter *adapter)
 201 {
 202         struct i40e_hw *hw = &adapter->hw;
 203
 204         wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK |
 205                                        I40E_VFINT_DYN_CTL01_ITR_INDX_MASK);
 206         wr32(hw, I40E_VFINT_ICR0_ENA1, I40E_VFINT_ICR0_ENA_ADMINQ_MASK);
 207
 208         /* read flush */
 209         rd32(hw, I40E_VFGEN_RSTAT);
 210 }
 211
 212 /**
 213  * i40evf_irq_disable - Mask off interrupt generation on the NIC
 214  * @adapter: board private structure
 215  **/
 216 static void i40evf_irq_disable(struct i40evf_adapter *adapter)
 217 {
 218         int i;
 219         struct i40e_hw *hw = &adapter->hw;
 220
 221         if (!adapter->msix_entries)
 222                 return;
 223
 224         for (i = 1; i < adapter->num_msix_vectors; i++) {
 225                 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), 0);
 226                 synchronize_irq(adapter->msix_entries[i].vector);
 227         }
 228         /* read flush */
 229         rd32(hw, I40E_VFGEN_RSTAT);
 230 }
 231
 232 /**
 233  * i40evf_irq_enable_queues - Enable interrupt for specified queues
 234  * @adapter: board private structure
 235  * @mask: bitmap of queues to enable
 236  **/
 237 void i40evf_irq_enable_queues(struct i40evf_adapter *adapter, u32 mask)
 238 {
 239         struct i40e_hw *hw = &adapter->hw;
 240         int i;
 241
 242         for (i = 1; i < adapter->num_msix_vectors; i++) {
 243                 if (mask & (1 << (i - 1))) {
 244                         wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1),
 245                              I40E_VFINT_DYN_CTLN1_INTENA_MASK |
 246                              I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
 247                              I40E_VFINT_DYN_CTLN_CLEARPBA_MASK);
 248                 }
 249         }
 250 }
 251
 252 /**
 253  * i40evf_fire_sw_int - Generate SW interrupt for specified vectors
 254  * @adapter: board private structure
 255  * @mask: bitmap of vectors to trigger
 256  **/
 257 static void i40evf_fire_sw_int(struct i40evf_adapter *adapter, u32 mask)
 258 {
 259         struct i40e_hw *hw = &adapter->hw;
 260         int i;
 261         uint32_t dyn_ctl;
 262
 263         if (mask & 1) {
 264                 dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTL01);
 265                 dyn_ctl |= I40E_VFINT_DYN_CTLN_SWINT_TRIG_MASK |
 266                            I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
 267                            I40E_VFINT_DYN_CTLN_CLEARPBA_MASK;
 268                 wr32(hw, I40E_VFINT_DYN_CTL01, dyn_ctl);
 269         }
 270         for (i = 1; i < adapter->num_msix_vectors; i++) {
 271                 if (mask & (1 << i)) {
 272                         dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTLN1(i - 1));
 273                         dyn_ctl |= I40E_VFINT_DYN_CTLN_SWINT_TRIG_MASK |
 274                                    I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
 275                                    I40E_VFINT_DYN_CTLN_CLEARPBA_MASK;
 276                         wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), dyn_ctl);
 277                 }
 278         }
 279 }
 280
 281 /**
 282  * i40evf_irq_enable - Enable default interrupt generation settings
 283  * @adapter: board private structure
 284  **/
 285 void i40evf_irq_enable(struct i40evf_adapter *adapter, bool flush)
 286 {
 287         struct i40e_hw *hw = &adapter->hw;
 288
 289         i40evf_misc_irq_enable(adapter);
 290         i40evf_irq_enable_queues(adapter, ~0);
 291
 292         if (flush)
 293                 rd32(hw, I40E_VFGEN_RSTAT);
 294 }
 295
 296 /**
 297  * i40evf_msix_aq - Interrupt handler for vector 0
 298  * @irq: interrupt number
 299  * @data: pointer to netdev
 300  **/
 301 static irqreturn_t i40evf_msix_aq(int irq, void *data)
 302 {
 303         struct net_device *netdev = data;
 304         struct i40evf_adapter *adapter = netdev_priv(netdev);
 305         struct i40e_hw *hw = &adapter->hw;
 306         u32 val;
 307         u32 ena_mask;
 308
 309         /* handle non-queue interrupts */
 310         val = rd32(hw, I40E_VFINT_ICR01);
 311         ena_mask = rd32(hw, I40E_VFINT_ICR0_ENA1);
 312
 313
 314         val = rd32(hw, I40E_VFINT_DYN_CTL01);
 315         val = val | I40E_PFINT_DYN_CTL0_CLEARPBA_MASK;
 316         wr32(hw, I40E_VFINT_DYN_CTL01, val);
 317
 318         /* schedule work on the private workqueue */
 319         schedule_work(&adapter->adminq_task);
 320
 321         return IRQ_HANDLED;
 322 }
 323
 324 /**
 325  * i40evf_msix_clean_rings - MSIX mode Interrupt Handler
 326  * @irq: interrupt number
 327  * @data: pointer to a q_vector
 328  **/
 329 static irqreturn_t i40evf_msix_clean_rings(int irq, void *data)
 330 {
 331         struct i40e_q_vector *q_vector = data;
 332
 333         if (!q_vector->tx.ring && !q_vector->rx.ring)
 334                 return IRQ_HANDLED;
 335
 336         napi_schedule(&q_vector->napi);
 337
 338         return IRQ_HANDLED;
 339 }
 340
 341 /**
 342  * i40evf_map_vector_to_rxq - associate irqs with rx queues
 343  * @adapter: board private structure
 344  * @v_idx: interrupt number
 345  * @r_idx: queue number
 346  **/
 347 static void
 348 i40evf_map_vector_to_rxq(struct i40evf_adapter *adapter, int v_idx, int r_idx)
 349 {
 350         struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
 351         struct i40e_ring *rx_ring = adapter->rx_rings[r_idx];
 352
 353         rx_ring->q_vector = q_vector;
 354         rx_ring->next = q_vector->rx.ring;
 355         rx_ring->vsi = &adapter->vsi;
 356         q_vector->rx.ring = rx_ring;
 357         q_vector->rx.count++;
 358         q_vector->rx.latency_range = I40E_LOW_LATENCY;
 359 }
 360
 361 /**
 362  * i40evf_map_vector_to_txq - associate irqs with tx queues
 363  * @adapter: board private structure
 364  * @v_idx: interrupt number
 365  * @t_idx: queue number
 366  **/
 367 static void
 368 i40evf_map_vector_to_txq(struct i40evf_adapter *adapter, int v_idx, int t_idx)
 369 {
 370         struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
 371         struct i40e_ring *tx_ring = adapter->tx_rings[t_idx];
 372
 373         tx_ring->q_vector = q_vector;
 374         tx_ring->next = q_vector->tx.ring;
 375         tx_ring->vsi = &adapter->vsi;
 376         q_vector->tx.ring = tx_ring;
 377         q_vector->tx.count++;
 378         q_vector->tx.latency_range = I40E_LOW_LATENCY;
 379         q_vector->num_ringpairs++;
 380         q_vector->ring_mask |= (1 << t_idx);
 381 }
 382
 383 /**
 384  * i40evf_map_rings_to_vectors - Maps descriptor rings to vectors
 385  * @adapter: board private structure to initialize
 386  *
 387  * This function maps descriptor rings to the queue-specific vectors
 388  * we were allotted through the MSI-X enabling code.  Ideally, we'd have
 389  * one vector per ring/queue, but on a constrained vector budget, we
 390  * group the rings as "efficiently" as possible.  You would add new
 391  * mapping configurations in here.
 392  **/
 393 static int i40evf_map_rings_to_vectors(struct i40evf_adapter *adapter)
 394 {
 395         int q_vectors;
 396         int v_start = 0;
 397         int rxr_idx = 0, txr_idx = 0;
 398         int rxr_remaining = adapter->num_active_queues;
 399         int txr_remaining = adapter->num_active_queues;
 400         int i, j;
 401         int rqpv, tqpv;
 402         int err = 0;
 403
 404         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 405
 406         /* The ideal configuration...
 407          * We have enough vectors to map one per queue.
 408          */
 409         if (q_vectors == (rxr_remaining * 2)) {
 410                 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
 411                         i40evf_map_vector_to_rxq(adapter, v_start, rxr_idx);
 412
 413                 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
 414                         i40evf_map_vector_to_txq(adapter, v_start, txr_idx);
 415                 goto out;
 416         }
 417
 418         /* If we don't have enough vectors for a 1-to-1
 419          * mapping, we'll have to group them so there are
 420          * multiple queues per vector.
 421          * Re-adjusting *qpv takes care of the remainder.
 422          */
 423         for (i = v_start; i < q_vectors; i++) {
 424                 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
 425                 for (j = 0; j < rqpv; j++) {
 426                         i40evf_map_vector_to_rxq(adapter, i, rxr_idx);
 427                         rxr_idx++;
 428                         rxr_remaining--;
 429                 }
 430         }
 431         for (i = v_start; i < q_vectors; i++) {
 432                 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
 433                 for (j = 0; j < tqpv; j++) {
 434                         i40evf_map_vector_to_txq(adapter, i, txr_idx);
 435                         txr_idx++;
 436                         txr_remaining--;
 437                 }
 438         }
 439
 440 out:
 441         adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
 442
 443         return err;
 444 }
 445
 446 /**
 447  * i40evf_request_traffic_irqs - Initialize MSI-X interrupts
 448  * @adapter: board private structure
 449  *
 450  * Allocates MSI-X vectors for tx and rx handling, and requests
 451  * interrupts from the kernel.
 452  **/
 453 static int
 454 i40evf_request_traffic_irqs(struct i40evf_adapter *adapter, char *basename)
 455 {
 456         int vector, err, q_vectors;
 457         int rx_int_idx = 0, tx_int_idx = 0;
 458
 459         i40evf_irq_disable(adapter);
 460         /* Decrement for Other and TCP Timer vectors */
 461         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 462
 463         for (vector = 0; vector < q_vectors; vector++) {
 464                 struct i40e_q_vector *q_vector = adapter->q_vector[vector];
 465
 466                 if (q_vector->tx.ring && q_vector->rx.ring) {
 467                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 468                                  "i40evf-%s-%s-%d", basename,
 469                                  "TxRx", rx_int_idx++);
 470                         tx_int_idx++;
 471                 } else if (q_vector->rx.ring) {
 472                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 473                                  "i40evf-%s-%s-%d", basename,
 474                                  "rx", rx_int_idx++);
 475                 } else if (q_vector->tx.ring) {
 476                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 477                                  "i40evf-%s-%s-%d", basename,
 478                                  "tx", tx_int_idx++);
 479                 } else {
 480                         /* skip this unused q_vector */
 481                         continue;
 482                 }
 483                 err = request_irq(
 484                         adapter->msix_entries[vector + NONQ_VECS].vector,
 485                         i40evf_msix_clean_rings,
 486                         0,
 487                         q_vector->name,
 488                         q_vector);
 489                 if (err) {
 490                         dev_info(&adapter->pdev->dev,
 491                                  "%s: request_irq failed, error: %d\n",
 492                                 __func__, err);
 493                         goto free_queue_irqs;
 494                 }
 495                 /* assign the mask for this irq */
 496                 irq_set_affinity_hint(
 497                         adapter->msix_entries[vector + NONQ_VECS].vector,
 498                         q_vector->affinity_mask);
 499         }
 500
 501         return 0;
 502
 503 free_queue_irqs:
 504         while (vector) {
 505                 vector--;
 506                 irq_set_affinity_hint(
 507                         adapter->msix_entries[vector + NONQ_VECS].vector,
 508                         NULL);
 509                 free_irq(adapter->msix_entries[vector + NONQ_VECS].vector,
 510                          adapter->q_vector[vector]);
 511         }
 512         return err;
 513 }
 514
 515 /**
 516  * i40evf_request_misc_irq - Initialize MSI-X interrupts
 517  * @adapter: board private structure
 518  *
 519  * Allocates MSI-X vector 0 and requests interrupts from the kernel. This
 520  * vector is only for the admin queue, and stays active even when the netdev
 521  * is closed.
 522  **/
 523 static int i40evf_request_misc_irq(struct i40evf_adapter *adapter)
 524 {
 525         struct net_device *netdev = adapter->netdev;
 526         int err;
 527
 528         snprintf(adapter->misc_vector_name,
 529                  sizeof(adapter->misc_vector_name) - 1, "i40evf-%s:mbx",
 530                  dev_name(&adapter->pdev->dev));
 531         err = request_irq(adapter->msix_entries[0].vector,
 532                           &i40evf_msix_aq, 0,
 533                           adapter->misc_vector_name, netdev);
 534         if (err) {
 535                 dev_err(&adapter->pdev->dev,
 536                         "request_irq for %s failed: %d\n",
 537                         adapter->misc_vector_name, err);
 538                 free_irq(adapter->msix_entries[0].vector, netdev);
 539         }
 540         return err;
 541 }
 542
 543 /**
 544  * i40evf_free_traffic_irqs - Free MSI-X interrupts
 545  * @adapter: board private structure
 546  *
 547  * Frees all MSI-X vectors other than 0.
 548  **/
 549 static void i40evf_free_traffic_irqs(struct i40evf_adapter *adapter)
 550 {
 551         int i;
 552         int q_vectors;
 553
 554         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 555
 556         for (i = 0; i < q_vectors; i++) {
 557                 irq_set_affinity_hint(adapter->msix_entries[i+1].vector,
 558                                       NULL);
 559                 free_irq(adapter->msix_entries[i+1].vector,
 560                          adapter->q_vector[i]);
 561         }
 562 }
 563
 564 /**
 565  * i40evf_free_misc_irq - Free MSI-X miscellaneous vector
 566  * @adapter: board private structure
 567  *
 568  * Frees MSI-X vector 0.
 569  **/
 570 static void i40evf_free_misc_irq(struct i40evf_adapter *adapter)
 571 {
 572         struct net_device *netdev = adapter->netdev;
 573
 574         free_irq(adapter->msix_entries[0].vector, netdev);
 575 }
 576
 577 /**
 578  * i40evf_configure_tx - Configure Transmit Unit after Reset
 579  * @adapter: board private structure
 580  *
 581  * Configure the Tx unit of the MAC after a reset.
 582  **/
 583 static void i40evf_configure_tx(struct i40evf_adapter *adapter)
 584 {
 585         struct i40e_hw *hw = &adapter->hw;
 586         int i;
 587
 588         for (i = 0; i < adapter->num_active_queues; i++)
 589                 adapter->tx_rings[i]->tail = hw->hw_addr + I40E_QTX_TAIL1(i);
 590 }
 591
 592 /**
 593  * i40evf_configure_rx - Configure Receive Unit after Reset
 594  * @adapter: board private structure
 595  *
 596  * Configure the Rx unit of the MAC after a reset.
 597  **/
 598 static void i40evf_configure_rx(struct i40evf_adapter *adapter)
 599 {
 600         struct i40e_hw *hw = &adapter->hw;
 601         struct net_device *netdev = adapter->netdev;
 602         int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
 603         int i;
 604         int rx_buf_len;
 605
 606
 607         adapter->flags &= ~I40EVF_FLAG_RX_PS_CAPABLE;
 608         adapter->flags |= I40EVF_FLAG_RX_1BUF_CAPABLE;
 609
 610         /* Decide whether to use packet split mode or not */
 611         if (netdev->mtu > ETH_DATA_LEN) {
 612                 if (adapter->flags & I40EVF_FLAG_RX_PS_CAPABLE)
 613                         adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
 614                 else
 615                         adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
 616         } else {
 617                 if (adapter->flags & I40EVF_FLAG_RX_1BUF_CAPABLE)
 618                         adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
 619                 else
 620                         adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
 621         }
 622
 623         /* Set the RX buffer length according to the mode */
 624         if (adapter->flags & I40EVF_FLAG_RX_PS_ENABLED) {
 625                 rx_buf_len = I40E_RX_HDR_SIZE;
 626         } else {
 627                 if (netdev->mtu <= ETH_DATA_LEN)
 628                         rx_buf_len = I40EVF_RXBUFFER_2048;
 629                 else
 630                         rx_buf_len = ALIGN(max_frame, 1024);
 631         }
 632
 633         for (i = 0; i < adapter->num_active_queues; i++) {
 634                 adapter->rx_rings[i]->tail = hw->hw_addr + I40E_QRX_TAIL1(i);
 635                 adapter->rx_rings[i]->rx_buf_len = rx_buf_len;
 636         }
 637 }
 638
 639 /**
 640  * i40evf_find_vlan - Search filter list for specific vlan filter
 641  * @adapter: board private structure
 642  * @vlan: vlan tag
 643  *
 644  * Returns ptr to the filter object or NULL
 645  **/
 646 static struct
 647 i40evf_vlan_filter *i40evf_find_vlan(struct i40evf_adapter *adapter, u16 vlan)
 648 {
 649         struct i40evf_vlan_filter *f;
 650
 651         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
 652                 if (vlan == f->vlan)
 653                         return f;
 654         }
 655         return NULL;
 656 }
 657
 658 /**
 659  * i40evf_add_vlan - Add a vlan filter to the list
 660  * @adapter: board private structure
 661  * @vlan: VLAN tag
 662  *
 663  * Returns ptr to the filter object or NULL when no memory available.
 664  **/
 665 static struct
 666 i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan)
 667 {
 668         struct i40evf_vlan_filter *f = NULL;
 669         int count = 50;
 670
 671         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 672                                 &adapter->crit_section)) {
 673                 udelay(1);
 674                 if (--count == 0)
 675                         goto out;
 676         }
 677
 678         f = i40evf_find_vlan(adapter, vlan);
 679         if (!f) {
 680                 f = kzalloc(sizeof(*f), GFP_ATOMIC);
 681                 if (!f)
 682                         goto clearout;
 683
 684                 f->vlan = vlan;
 685
 686                 INIT_LIST_HEAD(&f->list);
 687                 list_add(&f->list, &adapter->vlan_filter_list);
 688                 f->add = true;
 689                 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
 690         }
 691
 692 clearout:
 693         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 694 out:
 695         return f;
 696 }
 697
 698 /**
 699  * i40evf_del_vlan - Remove a vlan filter from the list
 700  * @adapter: board private structure
 701  * @vlan: VLAN tag
 702  **/
 703 static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan)
 704 {
 705         struct i40evf_vlan_filter *f;
 706         int count = 50;
 707
 708         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 709                                 &adapter->crit_section)) {
 710                 udelay(1);
 711                 if (--count == 0)
 712                         return;
 713         }
 714
 715         f = i40evf_find_vlan(adapter, vlan);
 716         if (f) {
 717                 f->remove = true;
 718                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
 719         }
 720         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 721 }
 722
 723 /**
 724  * i40evf_vlan_rx_add_vid - Add a VLAN filter to a device
 725  * @netdev: network device struct
 726  * @vid: VLAN tag
 727  **/
 728 static int i40evf_vlan_rx_add_vid(struct net_device *netdev,
 729                                   __always_unused __be16 proto, u16 vid)
 730 {
 731         struct i40evf_adapter *adapter = netdev_priv(netdev);
 732
 733         if (i40evf_add_vlan(adapter, vid) == NULL)
 734                 return -ENOMEM;
 735         return 0;
 736 }
 737
 738 /**
 739  * i40evf_vlan_rx_kill_vid - Remove a VLAN filter from a device
 740  * @netdev: network device struct
 741  * @vid: VLAN tag
 742  **/
 743 static int i40evf_vlan_rx_kill_vid(struct net_device *netdev,
 744                                    __always_unused __be16 proto, u16 vid)
 745 {
 746         struct i40evf_adapter *adapter = netdev_priv(netdev);
 747
 748         i40evf_del_vlan(adapter, vid);
 749         return 0;
 750 }
 751
 752 /**
 753  * i40evf_find_filter - Search filter list for specific mac filter
 754  * @adapter: board private structure
 755  * @macaddr: the MAC address
 756  *
 757  * Returns ptr to the filter object or NULL
 758  **/
 759 static struct
 760 i40evf_mac_filter *i40evf_find_filter(struct i40evf_adapter *adapter,
 761                                       u8 *macaddr)
 762 {
 763         struct i40evf_mac_filter *f;
 764
 765         if (!macaddr)
 766                 return NULL;
 767
 768         list_for_each_entry(f, &adapter->mac_filter_list, list) {
 769                 if (ether_addr_equal(macaddr, f->macaddr))
 770                         return f;
 771         }
 772         return NULL;
 773 }
 774
 775 /**
 776  * i40e_add_filter - Add a mac filter to the filter list
 777  * @adapter: board private structure
 778  * @macaddr: the MAC address
 779  *
 780  * Returns ptr to the filter object or NULL when no memory available.
 781  **/
 782 static struct
 783 i40evf_mac_filter *i40evf_add_filter(struct i40evf_adapter *adapter,
 784                                      u8 *macaddr)
 785 {
 786         struct i40evf_mac_filter *f;
 787         int count = 50;
 788
 789         if (!macaddr)
 790                 return NULL;
 791
 792         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 793                                 &adapter->crit_section)) {
 794                 udelay(1);
 795                 if (--count == 0)
 796                         return NULL;
 797         }
 798
 799         f = i40evf_find_filter(adapter, macaddr);
 800         if (!f) {
 801                 f = kzalloc(sizeof(*f), GFP_ATOMIC);
 802                 if (!f) {
 803                         clear_bit(__I40EVF_IN_CRITICAL_TASK,
 804                                   &adapter->crit_section);
 805                         return NULL;
 806                 }
 807
 808                 ether_addr_copy(f->macaddr, macaddr);
 809
 810                 list_add(&f->list, &adapter->mac_filter_list);
 811                 f->add = true;
 812                 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
 813         }
 814
 815         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 816         return f;
 817 }
 818
 819 /**
 820  * i40evf_set_mac - NDO callback to set port mac address
 821  * @netdev: network interface device structure
 822  * @p: pointer to an address structure
 823  *
 824  * Returns 0 on success, negative on failure
 825  **/
 826 static int i40evf_set_mac(struct net_device *netdev, void *p)
 827 {
 828         struct i40evf_adapter *adapter = netdev_priv(netdev);
 829         struct i40e_hw *hw = &adapter->hw;
 830         struct i40evf_mac_filter *f;
 831         struct sockaddr *addr = p;
 832
 833         if (!is_valid_ether_addr(addr->sa_data))
 834                 return -EADDRNOTAVAIL;
 835
 836         if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
 837                 return 0;
 838
 839         f = i40evf_add_filter(adapter, addr->sa_data);
 840         if (f) {
 841                 ether_addr_copy(hw->mac.addr, addr->sa_data);
 842                 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
 843         }
 844
 845         return (f == NULL) ? -ENOMEM : 0;
 846 }
 847
 848 /**
 849  * i40evf_set_rx_mode - NDO callback to set the netdev filters
 850  * @netdev: network interface device structure
 851  **/
 852 static void i40evf_set_rx_mode(struct net_device *netdev)
 853 {
 854         struct i40evf_adapter *adapter = netdev_priv(netdev);
 855         struct i40evf_mac_filter *f, *ftmp;
 856         struct netdev_hw_addr *uca;
 857         struct netdev_hw_addr *mca;
 858         int count = 50;
 859
 860         /* add addr if not already in the filter list */
 861         netdev_for_each_uc_addr(uca, netdev) {
 862                 i40evf_add_filter(adapter, uca->addr);
 863         }
 864         netdev_for_each_mc_addr(mca, netdev) {
 865                 i40evf_add_filter(adapter, mca->addr);
 866         }
 867
 868         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 869                                 &adapter->crit_section)) {
 870                 udelay(1);
 871                 if (--count == 0) {
 872                         dev_err(&adapter->pdev->dev,
 873                                 "Failed to get lock in %s\n", __func__);
 874                         return;
 875                 }
 876         }
 877         /* remove filter if not in netdev list */
 878         list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
 879                 bool found = false;
 880
 881                 if (is_multicast_ether_addr(f->macaddr)) {
 882                         netdev_for_each_mc_addr(mca, netdev) {
 883                                 if (ether_addr_equal(mca->addr, f->macaddr)) {
 884                                         found = true;
 885                                         break;
 886                                 }
 887                         }
 888                 } else {
 889                         netdev_for_each_uc_addr(uca, netdev) {
 890                                 if (ether_addr_equal(uca->addr, f->macaddr)) {
 891                                         found = true;
 892                                         break;
 893                                 }
 894                         }
 895                 }
 896                 if (found) {
 897                         f->remove = true;
 898                         adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
 899                 }
 900         }
 901         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 902 }
 903
 904 /**
 905  * i40evf_napi_enable_all - enable NAPI on all queue vectors
 906  * @adapter: board private structure
 907  **/
 908 static void i40evf_napi_enable_all(struct i40evf_adapter *adapter)
 909 {
 910         int q_idx;
 911         struct i40e_q_vector *q_vector;
 912         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 913
 914         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
 915                 struct napi_struct *napi;
 916
 917                 q_vector = adapter->q_vector[q_idx];
 918                 napi = &q_vector->napi;
 919                 napi_enable(napi);
 920         }
 921 }
 922
 923 /**
 924  * i40evf_napi_disable_all - disable NAPI on all queue vectors
 925  * @adapter: board private structure
 926  **/
 927 static void i40evf_napi_disable_all(struct i40evf_adapter *adapter)
 928 {
 929         int q_idx;
 930         struct i40e_q_vector *q_vector;
 931         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 932
 933         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
 934                 q_vector = adapter->q_vector[q_idx];
 935                 napi_disable(&q_vector->napi);
 936         }
 937 }
 938
 939 /**
 940  * i40evf_configure - set up transmit and receive data structures
 941  * @adapter: board private structure
 942  **/
 943 static void i40evf_configure(struct i40evf_adapter *adapter)
 944 {
 945         struct net_device *netdev = adapter->netdev;
 946         int i;
 947
 948         i40evf_set_rx_mode(netdev);
 949
 950         i40evf_configure_tx(adapter);
 951         i40evf_configure_rx(adapter);
 952         adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
 953
 954         for (i = 0; i < adapter->num_active_queues; i++) {
 955                 struct i40e_ring *ring = adapter->rx_rings[i];
 956
 957                 i40evf_alloc_rx_buffers_1buf(ring, ring->count);
 958                 ring->next_to_use = ring->count - 1;
 959                 writel(ring->next_to_use, ring->tail);
 960         }
 961 }
 962
 963 /**
 964  * i40evf_up_complete - Finish the last steps of bringing up a connection
 965  * @adapter: board private structure
 966  **/
 967 static int i40evf_up_complete(struct i40evf_adapter *adapter)
 968 {
 969         adapter->state = __I40EVF_RUNNING;
 970         clear_bit(__I40E_DOWN, &adapter->vsi.state);
 971
 972         i40evf_napi_enable_all(adapter);
 973
 974         adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES;
 975         mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
 976         return 0;
 977 }
 978
 979 /**
 980  * i40e_down - Shutdown the connection processing
 981  * @adapter: board private structure
 982  **/
 983 void i40evf_down(struct i40evf_adapter *adapter)
 984 {
 985         struct net_device *netdev = adapter->netdev;
 986         struct i40evf_mac_filter *f;
 987
 988         if (adapter->state == __I40EVF_DOWN)
 989                 return;
 990
 991         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 992                                 &adapter->crit_section))
 993                 usleep_range(500, 1000);
 994
 995         netif_carrier_off(netdev);
 996         netif_tx_disable(netdev);
 997         i40evf_napi_disable_all(adapter);
 998         i40evf_irq_disable(adapter);
 999
1000         /* remove all MAC filters */
1001         list_for_each_entry(f, &adapter->mac_filter_list, list) {
1002                 f->remove = true;
1003         }
1004         /* remove all VLAN filters */
1005         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
1006                 f->remove = true;
1007         }
1008         if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) &&
1009             adapter->state != __I40EVF_RESETTING) {
1010                 /* cancel any current operation */
1011                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1012                 /* Schedule operations to close down the HW. Don't wait
1013                  * here for this to complete. The watchdog is still running
1014                  * and it will take care of this.
1015                  */
1016                 adapter->aq_required = I40EVF_FLAG_AQ_DEL_MAC_FILTER;
1017                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
1018                 adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
1019         }
1020
1021         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1022 }
1023
1024 /**
1025  * i40evf_acquire_msix_vectors - Setup the MSIX capability
1026  * @adapter: board private structure
1027  * @vectors: number of vectors to request
1028  *
1029  * Work with the OS to set up the MSIX vectors needed.
1030  *
1031  * Returns 0 on success, negative on failure
1032  **/
1033 static int
1034 i40evf_acquire_msix_vectors(struct i40evf_adapter *adapter, int vectors)
1035 {
1036         int err, vector_threshold;
1037
1038         /* We'll want at least 3 (vector_threshold):
1039          * 0) Other (Admin Queue and link, mostly)
1040          * 1) TxQ[0] Cleanup
1041          * 2) RxQ[0] Cleanup
1042          */
1043         vector_threshold = MIN_MSIX_COUNT;
1044
1045         /* The more we get, the more we will assign to Tx/Rx Cleanup
1046          * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1047          * Right now, we simply care about how many we'll get; we'll
1048          * set them up later while requesting irq's.
1049          */
1050         err = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
1051                                     vector_threshold, vectors);
1052         if (err < 0) {
1053                 dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts\n");
1054                 kfree(adapter->msix_entries);
1055                 adapter->msix_entries = NULL;
1056                 return err;
1057         }
1058
1059         /* Adjust for only the vectors we'll use, which is minimum
1060          * of max_msix_q_vectors + NONQ_VECS, or the number of
1061          * vectors we were allocated.
1062          */
1063         adapter->num_msix_vectors = err;
1064         return 0;
1065 }
1066
1067 /**
1068  * i40evf_free_queues - Free memory for all rings
1069  * @adapter: board private structure to initialize
1070  *
1071  * Free all of the memory associated with queue pairs.
1072  **/
1073 static void i40evf_free_queues(struct i40evf_adapter *adapter)
1074 {
1075         int i;
1076
1077         if (!adapter->vsi_res)
1078                 return;
1079         for (i = 0; i < adapter->num_active_queues; i++) {
1080                 if (adapter->tx_rings[i])
1081                         kfree_rcu(adapter->tx_rings[i], rcu);
1082                 adapter->tx_rings[i] = NULL;
1083                 adapter->rx_rings[i] = NULL;
1084         }
1085 }
1086
1087 /**
1088  * i40evf_alloc_queues - Allocate memory for all rings
1089  * @adapter: board private structure to initialize
1090  *
1091  * We allocate one ring per queue at run-time since we don't know the
1092  * number of queues at compile-time.  The polling_netdev array is
1093  * intended for Multiqueue, but should work fine with a single queue.
1094  **/
1095 static int i40evf_alloc_queues(struct i40evf_adapter *adapter)
1096 {
1097         int i;
1098
1099         for (i = 0; i < adapter->num_active_queues; i++) {
1100                 struct i40e_ring *tx_ring;
1101                 struct i40e_ring *rx_ring;
1102
1103                 tx_ring = kzalloc(sizeof(*tx_ring) * 2, GFP_KERNEL);
1104                 if (!tx_ring)
1105                         goto err_out;
1106
1107                 tx_ring->queue_index = i;
1108                 tx_ring->netdev = adapter->netdev;
1109                 tx_ring->dev = &adapter->pdev->dev;
1110                 tx_ring->count = adapter->tx_desc_count;
1111                 adapter->tx_rings[i] = tx_ring;
1112
1113                 rx_ring = &tx_ring[1];
1114                 rx_ring->queue_index = i;
1115                 rx_ring->netdev = adapter->netdev;
1116                 rx_ring->dev = &adapter->pdev->dev;
1117                 rx_ring->count = adapter->rx_desc_count;
1118                 adapter->rx_rings[i] = rx_ring;
1119         }
1120
1121         return 0;
1122
1123 err_out:
1124         i40evf_free_queues(adapter);
1125         return -ENOMEM;
1126 }
1127
1128 /**
1129  * i40evf_set_interrupt_capability - set MSI-X or FAIL if not supported
1130  * @adapter: board private structure to initialize
1131  *
1132  * Attempt to configure the interrupts using the best available
1133  * capabilities of the hardware and the kernel.
1134  **/
1135 static int i40evf_set_interrupt_capability(struct i40evf_adapter *adapter)
1136 {
1137         int vector, v_budget;
1138         int pairs = 0;
1139         int err = 0;
1140
1141         if (!adapter->vsi_res) {
1142                 err = -EIO;
1143                 goto out;
1144         }
1145         pairs = adapter->num_active_queues;
1146
1147         /* It's easy to be greedy for MSI-X vectors, but it really
1148          * doesn't do us much good if we have a lot more vectors
1149          * than CPU's.  So let's be conservative and only ask for
1150          * (roughly) twice the number of vectors as there are CPU's.
1151          */
1152         v_budget = min_t(int, pairs, (int)(num_online_cpus() * 2)) + NONQ_VECS;
1153         v_budget = min_t(int, v_budget, (int)adapter->vf_res->max_vectors);
1154
1155         adapter->msix_entries = kcalloc(v_budget,
1156                                         sizeof(struct msix_entry), GFP_KERNEL);
1157         if (!adapter->msix_entries) {
1158                 err = -ENOMEM;
1159                 goto out;
1160         }
1161
1162         for (vector = 0; vector < v_budget; vector++)
1163                 adapter->msix_entries[vector].entry = vector;
1164
1165         i40evf_acquire_msix_vectors(adapter, v_budget);
1166
1167 out:
1168         adapter->netdev->real_num_tx_queues = pairs;
1169         return err;
1170 }
1171
1172 /**
1173  * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors
1174  * @adapter: board private structure to initialize
1175  *
1176  * We allocate one q_vector per queue interrupt.  If allocation fails we
1177  * return -ENOMEM.
1178  **/
1179 static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
1180 {
1181         int q_idx, num_q_vectors;
1182         struct i40e_q_vector *q_vector;
1183
1184         num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1185
1186         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1187                 q_vector = kzalloc(sizeof(*q_vector), GFP_KERNEL);
1188                 if (!q_vector)
1189                         goto err_out;
1190                 q_vector->adapter = adapter;
1191                 q_vector->vsi = &adapter->vsi;
1192                 q_vector->v_idx = q_idx;
1193                 netif_napi_add(adapter->netdev, &q_vector->napi,
1194                                i40evf_napi_poll, NAPI_POLL_WEIGHT);
1195                 adapter->q_vector[q_idx] = q_vector;
1196         }
1197
1198         return 0;
1199
1200 err_out:
1201         while (q_idx) {
1202                 q_idx--;
1203                 q_vector = adapter->q_vector[q_idx];
1204                 netif_napi_del(&q_vector->napi);
1205                 kfree(q_vector);
1206                 adapter->q_vector[q_idx] = NULL;
1207         }
1208         return -ENOMEM;
1209 }
1210
1211 /**
1212  * i40evf_free_q_vectors - Free memory allocated for interrupt vectors
1213  * @adapter: board private structure to initialize
1214  *
1215  * This function frees the memory allocated to the q_vectors.  In addition if
1216  * NAPI is enabled it will delete any references to the NAPI struct prior
1217  * to freeing the q_vector.
1218  **/
1219 static void i40evf_free_q_vectors(struct i40evf_adapter *adapter)
1220 {
1221         int q_idx, num_q_vectors;
1222         int napi_vectors;
1223
1224         num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1225         napi_vectors = adapter->num_active_queues;
1226
1227         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1228                 struct i40e_q_vector *q_vector = adapter->q_vector[q_idx];
1229
1230                 adapter->q_vector[q_idx] = NULL;
1231                 if (q_idx < napi_vectors)
1232                         netif_napi_del(&q_vector->napi);
1233                 kfree(q_vector);
1234         }
1235 }
1236
1237 /**
1238  * i40evf_reset_interrupt_capability - Reset MSIX setup
1239  * @adapter: board private structure
1240  *
1241  **/
1242 void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
1243 {
1244         pci_disable_msix(adapter->pdev);
1245         kfree(adapter->msix_entries);
1246         adapter->msix_entries = NULL;
1247 }
1248
1249 /**
1250  * i40evf_init_interrupt_scheme - Determine if MSIX is supported and init
1251  * @adapter: board private structure to initialize
1252  *
1253  **/
1254 int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter)
1255 {
1256         int err;
1257
1258         err = i40evf_set_interrupt_capability(adapter);
1259         if (err) {
1260                 dev_err(&adapter->pdev->dev,
1261                         "Unable to setup interrupt capabilities\n");
1262                 goto err_set_interrupt;
1263         }
1264
1265         err = i40evf_alloc_q_vectors(adapter);
1266         if (err) {
1267                 dev_err(&adapter->pdev->dev,
1268                         "Unable to allocate memory for queue vectors\n");
1269                 goto err_alloc_q_vectors;
1270         }
1271
1272         err = i40evf_alloc_queues(adapter);
1273         if (err) {
1274                 dev_err(&adapter->pdev->dev,
1275                         "Unable to allocate memory for queues\n");
1276                 goto err_alloc_queues;
1277         }
1278
1279         dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
1280                  (adapter->num_active_queues > 1) ? "Enabled" : "Disabled",
1281                  adapter->num_active_queues);
1282
1283         return 0;
1284 err_alloc_queues:
1285         i40evf_free_q_vectors(adapter);
1286 err_alloc_q_vectors:
1287         i40evf_reset_interrupt_capability(adapter);
1288 err_set_interrupt:
1289         return err;
1290 }
1291
1292 /**
1293  * i40evf_watchdog_timer - Periodic call-back timer
1294  * @data: pointer to adapter disguised as unsigned long
1295  **/
1296 static void i40evf_watchdog_timer(unsigned long data)
1297 {
1298         struct i40evf_adapter *adapter = (struct i40evf_adapter *)data;
1299
1300         schedule_work(&adapter->watchdog_task);
1301         /* timer will be rescheduled in watchdog task */
1302 }
1303
1304 /**
1305  * i40evf_watchdog_task - Periodic call-back task
1306  * @work: pointer to work_struct
1307  **/
1308 static void i40evf_watchdog_task(struct work_struct *work)
1309 {
1310         struct i40evf_adapter *adapter = container_of(work,
1311                                                       struct i40evf_adapter,
1312                                                       watchdog_task);
1313         struct i40e_hw *hw = &adapter->hw;
1314         uint32_t rstat_val;
1315
1316         if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
1317                 goto restart_watchdog;
1318
1319         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1320                 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1321                             I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1322                 if ((rstat_val == I40E_VFR_VFACTIVE) ||
1323                     (rstat_val == I40E_VFR_COMPLETED)) {
1324                         /* A chance for redemption! */
1325                         dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
1326                         adapter->state = __I40EVF_STARTUP;
1327                         adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1328                         schedule_delayed_work(&adapter->init_task, 10);
1329                         clear_bit(__I40EVF_IN_CRITICAL_TASK,
1330                                   &adapter->crit_section);
1331                         /* Don't reschedule the watchdog, since we've restarted
1332                          * the init task. When init_task contacts the PF and
1333                          * gets everything set up again, it'll restart the
1334                          * watchdog for us. Down, boy. Sit. Stay. Woof.
1335                          */
1336                         return;
1337                 }
1338                 adapter->aq_required = 0;
1339                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1340                 goto watchdog_done;
1341         }
1342
1343         if ((adapter->state < __I40EVF_DOWN) ||
1344             (adapter->flags & I40EVF_FLAG_RESET_PENDING))
1345                 goto watchdog_done;
1346
1347         /* check for reset */
1348         rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1349                     I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1350         if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) &&
1351             (rstat_val != I40E_VFR_VFACTIVE) &&
1352             (rstat_val != I40E_VFR_COMPLETED)) {
1353                 adapter->state = __I40EVF_RESETTING;
1354                 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1355                 dev_err(&adapter->pdev->dev, "Hardware reset detected\n");
1356                 schedule_work(&adapter->reset_task);
1357                 adapter->aq_required = 0;
1358                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1359                 goto watchdog_done;
1360         }
1361
1362         /* Process admin queue tasks. After init, everything gets done
1363          * here so we don't race on the admin queue.
1364          */
1365         if (adapter->current_op) {
1366                 if (!i40evf_asq_done(hw)) {
1367                         dev_dbg(&adapter->pdev->dev, "Admin queue timeout\n");
1368                         i40evf_send_api_ver(adapter);
1369                 }
1370                 goto watchdog_done;
1371         }
1372
1373         if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
1374                 i40evf_disable_queues(adapter);
1375                 goto watchdog_done;
1376         }
1377
1378         if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
1379                 i40evf_map_queues(adapter);
1380                 goto watchdog_done;
1381         }
1382
1383         if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
1384                 i40evf_add_ether_addrs(adapter);
1385                 goto watchdog_done;
1386         }
1387
1388         if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
1389                 i40evf_add_vlans(adapter);
1390                 goto watchdog_done;
1391         }
1392
1393         if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
1394                 i40evf_del_ether_addrs(adapter);
1395                 goto watchdog_done;
1396         }
1397
1398         if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
1399                 i40evf_del_vlans(adapter);
1400                 goto watchdog_done;
1401         }
1402
1403         if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
1404                 i40evf_configure_queues(adapter);
1405                 goto watchdog_done;
1406         }
1407
1408         if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
1409                 i40evf_enable_queues(adapter);
1410                 goto watchdog_done;
1411         }
1412
1413         if (adapter->state == __I40EVF_RUNNING)
1414                 i40evf_request_stats(adapter);
1415 watchdog_done:
1416         if (adapter->state == __I40EVF_RUNNING) {
1417                 i40evf_irq_enable_queues(adapter, ~0);
1418                 i40evf_fire_sw_int(adapter, 0xFF);
1419         } else {
1420                 i40evf_fire_sw_int(adapter, 0x1);
1421         }
1422
1423         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1424 restart_watchdog:
1425         if (adapter->state == __I40EVF_REMOVE)
1426                 return;
1427         if (adapter->aq_required)
1428                 mod_timer(&adapter->watchdog_timer,
1429                           jiffies + msecs_to_jiffies(20));
1430         else
1431                 mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
1432         schedule_work(&adapter->adminq_task);
1433 }
1434
1435 /**
1436  * i40evf_configure_rss - Prepare for RSS
1437  * @adapter: board private structure
1438  **/
1439 static void i40evf_configure_rss(struct i40evf_adapter *adapter)
1440 {
1441         u32 rss_key[I40E_VFQF_HKEY_MAX_INDEX + 1];
1442         struct i40e_hw *hw = &adapter->hw;
1443         u32 cqueue = 0;
1444         u32 lut = 0;
1445         int i, j;
1446         u64 hena;
1447
1448         /* Hash type is configured by the PF - we just supply the key */
1449         netdev_rss_key_fill(rss_key, sizeof(rss_key));
1450
1451         /* Fill out hash function seed */
1452         for (i = 0; i <= I40E_VFQF_HKEY_MAX_INDEX; i++)
1453                 wr32(hw, I40E_VFQF_HKEY(i), rss_key[i]);
1454
1455         /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
1456         hena = I40E_DEFAULT_RSS_HENA;
1457         wr32(hw, I40E_VFQF_HENA(0), (u32)hena);
1458         wr32(hw, I40E_VFQF_HENA(1), (u32)(hena >> 32));
1459
1460         /* Populate the LUT with max no. of queues in round robin fashion */
1461         for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++) {
1462                 lut = 0;
1463                 for (j = 0; j < 4; j++) {
1464                         if (cqueue == adapter->num_active_queues)
1465                                 cqueue = 0;
1466                         lut |= ((cqueue) << (8 * j));
1467                         cqueue++;
1468                 }
1469                 wr32(hw, I40E_VFQF_HLUT(i), lut);
1470         }
1471         i40e_flush(hw);
1472 }
1473
1474 #define I40EVF_RESET_WAIT_MS 10
1475 #define I40EVF_RESET_WAIT_COUNT 500
1476 /**
1477  * i40evf_reset_task - Call-back task to handle hardware reset
1478  * @work: pointer to work_struct
1479  *
1480  * During reset we need to shut down and reinitialize the admin queue
1481  * before we can use it to communicate with the PF again. We also clear
1482  * and reinit the rings because that context is lost as well.
1483  **/
1484 static void i40evf_reset_task(struct work_struct *work)
1485 {
1486         struct i40evf_adapter *adapter = container_of(work,
1487                                                       struct i40evf_adapter,
1488                                                       reset_task);
1489         struct net_device *netdev = adapter->netdev;
1490         struct i40e_hw *hw = &adapter->hw;
1491         struct i40evf_mac_filter *f;
1492         uint32_t rstat_val;
1493         int i = 0, err;
1494
1495         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1496                                 &adapter->crit_section))
1497                 usleep_range(500, 1000);
1498
1499         i40evf_misc_irq_disable(adapter);
1500         if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) {
1501                 adapter->flags &= ~I40EVF_FLAG_RESET_NEEDED;
1502                 /* Restart the AQ here. If we have been reset but didn't
1503                  * detect it, or if the PF had to reinit, our AQ will be hosed.
1504                  */
1505                 i40evf_shutdown_adminq(hw);
1506                 i40evf_init_adminq(hw);
1507                 i40evf_request_reset(adapter);
1508         }
1509         adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1510
1511         /* poll until we see the reset actually happen */
1512         for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1513                 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1514                             I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1515                 if ((rstat_val != I40E_VFR_VFACTIVE) &&
1516                     (rstat_val != I40E_VFR_COMPLETED))
1517                         break;
1518                 usleep_range(500, 1000);
1519         }
1520         if (i == I40EVF_RESET_WAIT_COUNT) {
1521                 dev_info(&adapter->pdev->dev, "Never saw reset\n");
1522                 goto continue_reset; /* act like the reset happened */
1523         }
1524
1525         /* wait until the reset is complete and the PF is responding to us */
1526         for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1527                 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1528                             I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1529                 if (rstat_val == I40E_VFR_VFACTIVE)
1530                         break;
1531                 msleep(I40EVF_RESET_WAIT_MS);
1532         }
1533         /* extra wait to make sure minimum wait is met */
1534         msleep(I40EVF_RESET_WAIT_MS);
1535         if (i == I40EVF_RESET_WAIT_COUNT) {
1536                 struct i40evf_mac_filter *f, *ftmp;
1537                 struct i40evf_vlan_filter *fv, *fvtmp;
1538
1539                 /* reset never finished */
1540                 dev_err(&adapter->pdev->dev, "Reset never finished (%x)\n",
1541                         rstat_val);
1542                 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
1543
1544                 if (netif_running(adapter->netdev)) {
1545                         set_bit(__I40E_DOWN, &adapter->vsi.state);
1546                         netif_carrier_off(netdev);
1547                         netif_tx_disable(netdev);
1548                         i40evf_napi_disable_all(adapter);
1549                         i40evf_irq_disable(adapter);
1550                         i40evf_free_traffic_irqs(adapter);
1551                         i40evf_free_all_tx_resources(adapter);
1552                         i40evf_free_all_rx_resources(adapter);
1553                 }
1554
1555                 /* Delete all of the filters, both MAC and VLAN. */
1556                 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list,
1557                                          list) {
1558                         list_del(&f->list);
1559                         kfree(f);
1560                 }
1561
1562                 list_for_each_entry_safe(fv, fvtmp, &adapter->vlan_filter_list,
1563                                          list) {
1564                         list_del(&fv->list);
1565                         kfree(fv);
1566                 }
1567
1568                 i40evf_free_misc_irq(adapter);
1569                 i40evf_reset_interrupt_capability(adapter);
1570                 i40evf_free_queues(adapter);
1571                 i40evf_free_q_vectors(adapter);
1572                 kfree(adapter->vf_res);
1573                 i40evf_shutdown_adminq(hw);
1574                 adapter->netdev->flags &= ~IFF_UP;
1575                 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1576                 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1577                 dev_info(&adapter->pdev->dev, "Reset task did not complete, VF disabled\n");
1578                 return; /* Do not attempt to reinit. It's dead, Jim. */
1579         }
1580
1581 continue_reset:
1582         if (netif_running(adapter->netdev)) {
1583                 netif_carrier_off(netdev);
1584                 netif_tx_stop_all_queues(netdev);
1585                 i40evf_napi_disable_all(adapter);
1586         }
1587         i40evf_irq_disable(adapter);
1588
1589         adapter->state = __I40EVF_RESETTING;
1590         adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1591
1592         /* free the Tx/Rx rings and descriptors, might be better to just
1593          * re-use them sometime in the future
1594          */
1595         i40evf_free_all_rx_resources(adapter);
1596         i40evf_free_all_tx_resources(adapter);
1597
1598         /* kill and reinit the admin queue */
1599         if (i40evf_shutdown_adminq(hw))
1600                 dev_warn(&adapter->pdev->dev, "Failed to shut down adminq\n");
1601         adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1602         err = i40evf_init_adminq(hw);
1603         if (err)
1604                 dev_info(&adapter->pdev->dev, "Failed to init adminq: %d\n",
1605                          err);
1606
1607         i40evf_map_queues(adapter);
1608
1609         /* re-add all MAC filters */
1610         list_for_each_entry(f, &adapter->mac_filter_list, list) {
1611                 f->add = true;
1612         }
1613         /* re-add all VLAN filters */
1614         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
1615                 f->add = true;
1616         }
1617         adapter->aq_required = I40EVF_FLAG_AQ_ADD_MAC_FILTER;
1618         adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
1619         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1620         i40evf_misc_irq_enable(adapter);
1621
1622         mod_timer(&adapter->watchdog_timer, jiffies + 2);
1623
1624         if (netif_running(adapter->netdev)) {
1625                 /* allocate transmit descriptors */
1626                 err = i40evf_setup_all_tx_resources(adapter);
1627                 if (err)
1628                         goto reset_err;
1629
1630                 /* allocate receive descriptors */
1631                 err = i40evf_setup_all_rx_resources(adapter);
1632                 if (err)
1633                         goto reset_err;
1634
1635                 i40evf_configure(adapter);
1636
1637                 err = i40evf_up_complete(adapter);
1638                 if (err)
1639                         goto reset_err;
1640
1641                 i40evf_irq_enable(adapter, true);
1642         } else {
1643                 adapter->state = __I40EVF_DOWN;
1644         }
1645
1646         return;
1647 reset_err:
1648         dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
1649         i40evf_close(adapter->netdev);
1650 }
1651
1652 /**
1653  * i40evf_adminq_task - worker thread to clean the admin queue
1654  * @work: pointer to work_struct containing our data
1655  **/
1656 static void i40evf_adminq_task(struct work_struct *work)
1657 {
1658         struct i40evf_adapter *adapter =
1659                 container_of(work, struct i40evf_adapter, adminq_task);
1660         struct i40e_hw *hw = &adapter->hw;
1661         struct i40e_arq_event_info event;
1662         struct i40e_virtchnl_msg *v_msg;
1663         i40e_status ret;
1664         u32 val, oldval;
1665         u16 pending;
1666
1667         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
1668                 goto out;
1669
1670         event.buf_len = I40EVF_MAX_AQ_BUF_SIZE;
1671         event.msg_buf = kzalloc(event.buf_len, GFP_KERNEL);
1672         if (!event.msg_buf)
1673                 goto out;
1674
1675         v_msg = (struct i40e_virtchnl_msg *)&event.desc;
1676         do {
1677                 ret = i40evf_clean_arq_element(hw, &event, &pending);
1678                 if (ret || !v_msg->v_opcode)
1679                         break; /* No event to process or error cleaning ARQ */
1680
1681                 i40evf_virtchnl_completion(adapter, v_msg->v_opcode,
1682                                            v_msg->v_retval, event.msg_buf,
1683                                            event.msg_len);
1684                 if (pending != 0)
1685                         memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
1686         } while (pending);
1687
1688         if ((adapter->flags &
1689              (I40EVF_FLAG_RESET_PENDING | I40EVF_FLAG_RESET_NEEDED)) ||
1690             adapter->state == __I40EVF_RESETTING)
1691                 goto freedom;
1692
1693         /* check for error indications */
1694         val = rd32(hw, hw->aq.arq.len);
1695         oldval = val;
1696         if (val & I40E_VF_ARQLEN_ARQVFE_MASK) {
1697                 dev_info(&adapter->pdev->dev, "ARQ VF Error detected\n");
1698                 val &= ~I40E_VF_ARQLEN_ARQVFE_MASK;
1699         }
1700         if (val & I40E_VF_ARQLEN_ARQOVFL_MASK) {
1701                 dev_info(&adapter->pdev->dev, "ARQ Overflow Error detected\n");
1702                 val &= ~I40E_VF_ARQLEN_ARQOVFL_MASK;
1703         }
1704         if (val & I40E_VF_ARQLEN_ARQCRIT_MASK) {
1705                 dev_info(&adapter->pdev->dev, "ARQ Critical Error detected\n");
1706                 val &= ~I40E_VF_ARQLEN_ARQCRIT_MASK;
1707         }
1708         if (oldval != val)
1709                 wr32(hw, hw->aq.arq.len, val);
1710
1711         val = rd32(hw, hw->aq.asq.len);
1712         oldval = val;
1713         if (val & I40E_VF_ATQLEN_ATQVFE_MASK) {
1714                 dev_info(&adapter->pdev->dev, "ASQ VF Error detected\n");
1715                 val &= ~I40E_VF_ATQLEN_ATQVFE_MASK;
1716         }
1717         if (val & I40E_VF_ATQLEN_ATQOVFL_MASK) {
1718                 dev_info(&adapter->pdev->dev, "ASQ Overflow Error detected\n");
1719                 val &= ~I40E_VF_ATQLEN_ATQOVFL_MASK;
1720         }
1721         if (val & I40E_VF_ATQLEN_ATQCRIT_MASK) {
1722                 dev_info(&adapter->pdev->dev, "ASQ Critical Error detected\n");
1723                 val &= ~I40E_VF_ATQLEN_ATQCRIT_MASK;
1724         }
1725         if (oldval != val)
1726                 wr32(hw, hw->aq.asq.len, val);
1727
1728 freedom:
1729         kfree(event.msg_buf);
1730 out:
1731         /* re-enable Admin queue interrupt cause */
1732         i40evf_misc_irq_enable(adapter);
1733 }
1734
1735 /**
1736  * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
1737  * @adapter: board private structure
1738  *
1739  * Free all transmit software resources
1740  **/
1741 void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
1742 {
1743         int i;
1744
1745         for (i = 0; i < adapter->num_active_queues; i++)
1746                 if (adapter->tx_rings[i]->desc)
1747                         i40evf_free_tx_resources(adapter->tx_rings[i]);
1748 }
1749
1750 /**
1751  * i40evf_setup_all_tx_resources - allocate all queues Tx resources
1752  * @adapter: board private structure
1753  *
1754  * If this function returns with an error, then it's possible one or
1755  * more of the rings is populated (while the rest are not).  It is the
1756  * callers duty to clean those orphaned rings.
1757  *
1758  * Return 0 on success, negative on failure
1759  **/
1760 static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter)
1761 {
1762         int i, err = 0;
1763
1764         for (i = 0; i < adapter->num_active_queues; i++) {
1765                 adapter->tx_rings[i]->count = adapter->tx_desc_count;
1766                 err = i40evf_setup_tx_descriptors(adapter->tx_rings[i]);
1767                 if (!err)
1768                         continue;
1769                 dev_err(&adapter->pdev->dev,
1770                         "%s: Allocation for Tx Queue %u failed\n",
1771                         __func__, i);
1772                 break;
1773         }
1774
1775         return err;
1776 }
1777
1778 /**
1779  * i40evf_setup_all_rx_resources - allocate all queues Rx resources
1780  * @adapter: board private structure
1781  *
1782  * If this function returns with an error, then it's possible one or
1783  * more of the rings is populated (while the rest are not).  It is the
1784  * callers duty to clean those orphaned rings.
1785  *
1786  * Return 0 on success, negative on failure
1787  **/
1788 static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter)
1789 {
1790         int i, err = 0;
1791
1792         for (i = 0; i < adapter->num_active_queues; i++) {
1793                 adapter->rx_rings[i]->count = adapter->rx_desc_count;
1794                 err = i40evf_setup_rx_descriptors(adapter->rx_rings[i]);
1795                 if (!err)
1796                         continue;
1797                 dev_err(&adapter->pdev->dev,
1798                         "%s: Allocation for Rx Queue %u failed\n",
1799                         __func__, i);
1800                 break;
1801         }
1802         return err;
1803 }
1804
1805 /**
1806  * i40evf_free_all_rx_resources - Free Rx Resources for All Queues
1807  * @adapter: board private structure
1808  *
1809  * Free all receive software resources
1810  **/
1811 void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
1812 {
1813         int i;
1814
1815         for (i = 0; i < adapter->num_active_queues; i++)
1816                 if (adapter->rx_rings[i]->desc)
1817                         i40evf_free_rx_resources(adapter->rx_rings[i]);
1818 }
1819
1820 /**
1821  * i40evf_open - Called when a network interface is made active
1822  * @netdev: network interface device structure
1823  *
1824  * Returns 0 on success, negative value on failure
1825  *
1826  * The open entry point is called when a network interface is made
1827  * active by the system (IFF_UP).  At this point all resources needed
1828  * for transmit and receive operations are allocated, the interrupt
1829  * handler is registered with the OS, the watchdog timer is started,
1830  * and the stack is notified that the interface is ready.
1831  **/
1832 static int i40evf_open(struct net_device *netdev)
1833 {
1834         struct i40evf_adapter *adapter = netdev_priv(netdev);
1835         int err;
1836
1837         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1838                 dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
1839                 return -EIO;
1840         }
1841         if (adapter->state != __I40EVF_DOWN || adapter->aq_required)
1842                 return -EBUSY;
1843
1844         /* allocate transmit descriptors */
1845         err = i40evf_setup_all_tx_resources(adapter);
1846         if (err)
1847                 goto err_setup_tx;
1848
1849         /* allocate receive descriptors */
1850         err = i40evf_setup_all_rx_resources(adapter);
1851         if (err)
1852                 goto err_setup_rx;
1853
1854         /* clear any pending interrupts, may auto mask */
1855         err = i40evf_request_traffic_irqs(adapter, netdev->name);
1856         if (err)
1857                 goto err_req_irq;
1858
1859         i40evf_configure(adapter);
1860
1861         err = i40evf_up_complete(adapter);
1862         if (err)
1863                 goto err_req_irq;
1864
1865         i40evf_irq_enable(adapter, true);
1866
1867         return 0;
1868
1869 err_req_irq:
1870         i40evf_down(adapter);
1871         i40evf_free_traffic_irqs(adapter);
1872 err_setup_rx:
1873         i40evf_free_all_rx_resources(adapter);
1874 err_setup_tx:
1875         i40evf_free_all_tx_resources(adapter);
1876
1877         return err;
1878 }
1879
1880 /**
1881  * i40evf_close - Disables a network interface
1882  * @netdev: network interface device structure
1883  *
1884  * Returns 0, this is not allowed to fail
1885  *
1886  * The close entry point is called when an interface is de-activated
1887  * by the OS.  The hardware is still under the drivers control, but
1888  * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
1889  * are freed, along with all transmit and receive resources.
1890  **/
1891 static int i40evf_close(struct net_device *netdev)
1892 {
1893         struct i40evf_adapter *adapter = netdev_priv(netdev);
1894
1895         if (adapter->state <= __I40EVF_DOWN)
1896                 return 0;
1897
1898
1899         set_bit(__I40E_DOWN, &adapter->vsi.state);
1900
1901         i40evf_down(adapter);
1902         adapter->state = __I40EVF_DOWN;
1903         i40evf_free_traffic_irqs(adapter);
1904
1905         return 0;
1906 }
1907
1908 /**
1909  * i40evf_get_stats - Get System Network Statistics
1910  * @netdev: network interface device structure
1911  *
1912  * Returns the address of the device statistics structure.
1913  * The statistics are actually updated from the timer callback.
1914  **/
1915 static struct net_device_stats *i40evf_get_stats(struct net_device *netdev)
1916 {
1917         struct i40evf_adapter *adapter = netdev_priv(netdev);
1918
1919         /* only return the current stats */
1920         return &adapter->net_stats;
1921 }
1922
1923 /**
1924  * i40evf_change_mtu - Change the Maximum Transfer Unit
1925  * @netdev: network interface device structure
1926  * @new_mtu: new value for maximum frame size
1927  *
1928  * Returns 0 on success, negative on failure
1929  **/
1930 static int i40evf_change_mtu(struct net_device *netdev, int new_mtu)
1931 {
1932         struct i40evf_adapter *adapter = netdev_priv(netdev);
1933         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
1934
1935         if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
1936                 return -EINVAL;
1937
1938         netdev->mtu = new_mtu;
1939         adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
1940         schedule_work(&adapter->reset_task);
1941
1942         return 0;
1943 }
1944
1945 static const struct net_device_ops i40evf_netdev_ops = {
1946         .ndo_open               = i40evf_open,
1947         .ndo_stop               = i40evf_close,
1948         .ndo_start_xmit         = i40evf_xmit_frame,
1949         .ndo_get_stats          = i40evf_get_stats,
1950         .ndo_set_rx_mode        = i40evf_set_rx_mode,
1951         .ndo_validate_addr      = eth_validate_addr,
1952         .ndo_set_mac_address    = i40evf_set_mac,
1953         .ndo_change_mtu         = i40evf_change_mtu,
1954         .ndo_tx_timeout         = i40evf_tx_timeout,
1955         .ndo_vlan_rx_add_vid    = i40evf_vlan_rx_add_vid,
1956         .ndo_vlan_rx_kill_vid   = i40evf_vlan_rx_kill_vid,
1957 };
1958
1959 /**
1960  * i40evf_check_reset_complete - check that VF reset is complete
1961  * @hw: pointer to hw struct
1962  *
1963  * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
1964  **/
1965 static int i40evf_check_reset_complete(struct i40e_hw *hw)
1966 {
1967         u32 rstat;
1968         int i;
1969
1970         for (i = 0; i < 100; i++) {
1971                 rstat = rd32(hw, I40E_VFGEN_RSTAT) &
1972                             I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1973                 if ((rstat == I40E_VFR_VFACTIVE) ||
1974                     (rstat == I40E_VFR_COMPLETED))
1975                         return 0;
1976                 usleep_range(10, 20);
1977         }
1978         return -EBUSY;
1979 }
1980
1981 /**
1982  * i40evf_init_task - worker thread to perform delayed initialization
1983  * @work: pointer to work_struct containing our data
1984  *
1985  * This task completes the work that was begun in probe. Due to the nature
1986  * of VF-PF communications, we may need to wait tens of milliseconds to get
1987  * responses back from the PF. Rather than busy-wait in probe and bog down the
1988  * whole system, we'll do it in a task so we can sleep.
1989  * This task only runs during driver init. Once we've established
1990  * communications with the PF driver and set up our netdev, the watchdog
1991  * takes over.
1992  **/
1993 static void i40evf_init_task(struct work_struct *work)
1994 {
1995         struct i40evf_adapter *adapter = container_of(work,
1996                                                       struct i40evf_adapter,
1997                                                       init_task.work);
1998         struct net_device *netdev = adapter->netdev;
1999         struct i40evf_mac_filter *f;
2000         struct i40e_hw *hw = &adapter->hw;
2001         struct pci_dev *pdev = adapter->pdev;
2002         int i, err, bufsz;
2003
2004         switch (adapter->state) {
2005         case __I40EVF_STARTUP:
2006                 /* driver loaded, probe complete */
2007                 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
2008                 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
2009                 err = i40e_set_mac_type(hw);
2010                 if (err) {
2011                         dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
2012                                 err);
2013                         goto err;
2014                 }
2015                 err = i40evf_check_reset_complete(hw);
2016                 if (err) {
2017                         dev_info(&pdev->dev, "Device is still in reset (%d), retrying\n",
2018                                  err);
2019                         goto err;
2020                 }
2021                 hw->aq.num_arq_entries = I40EVF_AQ_LEN;
2022                 hw->aq.num_asq_entries = I40EVF_AQ_LEN;
2023                 hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2024                 hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2025
2026                 err = i40evf_init_adminq(hw);
2027                 if (err) {
2028                         dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
2029                                 err);
2030                         goto err;
2031                 }
2032                 err = i40evf_send_api_ver(adapter);
2033                 if (err) {
2034                         dev_err(&pdev->dev, "Unable to send to PF (%d)\n", err);
2035                         i40evf_shutdown_adminq(hw);
2036                         goto err;
2037                 }
2038                 adapter->state = __I40EVF_INIT_VERSION_CHECK;
2039                 goto restart;
2040         case __I40EVF_INIT_VERSION_CHECK:
2041                 if (!i40evf_asq_done(hw)) {
2042                         dev_err(&pdev->dev, "Admin queue command never completed\n");
2043                         i40evf_shutdown_adminq(hw);
2044                         adapter->state = __I40EVF_STARTUP;
2045                         goto err;
2046                 }
2047
2048                 /* aq msg sent, awaiting reply */
2049                 err = i40evf_verify_api_ver(adapter);
2050                 if (err) {
2051                         if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
2052                                 err = i40evf_send_api_ver(adapter);
2053                         goto err;
2054                 }
2055                 err = i40evf_send_vf_config_msg(adapter);
2056                 if (err) {
2057                         dev_err(&pdev->dev, "Unable to send config request (%d)\n",
2058                                 err);
2059                         goto err;
2060                 }
2061                 adapter->state = __I40EVF_INIT_GET_RESOURCES;
2062                 goto restart;
2063         case __I40EVF_INIT_GET_RESOURCES:
2064                 /* aq msg sent, awaiting reply */
2065                 if (!adapter->vf_res) {
2066                         bufsz = sizeof(struct i40e_virtchnl_vf_resource) +
2067                                 (I40E_MAX_VF_VSI *
2068                                  sizeof(struct i40e_virtchnl_vsi_resource));
2069                         adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
2070                         if (!adapter->vf_res)
2071                                 goto err;
2072                 }
2073                 err = i40evf_get_vf_config(adapter);
2074                 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK) {
2075                         err = i40evf_send_vf_config_msg(adapter);
2076                         goto err;
2077                 }
2078                 if (err) {
2079                         dev_err(&pdev->dev, "Unable to get VF config (%d)\n",
2080                                 err);
2081                         goto err_alloc;
2082                 }
2083                 adapter->state = __I40EVF_INIT_SW;
2084                 break;
2085         default:
2086                 goto err_alloc;
2087         }
2088         /* got VF config message back from PF, now we can parse it */
2089         for (i = 0; i < adapter->vf_res->num_vsis; i++) {
2090                 if (adapter->vf_res->vsi_res[i].vsi_type == I40E_VSI_SRIOV)
2091                         adapter->vsi_res = &adapter->vf_res->vsi_res[i];
2092         }
2093         if (!adapter->vsi_res) {
2094                 dev_err(&pdev->dev, "No LAN VSI found\n");
2095                 goto err_alloc;
2096         }
2097
2098         adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
2099
2100         netdev->netdev_ops = &i40evf_netdev_ops;
2101         i40evf_set_ethtool_ops(netdev);
2102         netdev->watchdog_timeo = 5 * HZ;
2103         netdev->features |= NETIF_F_HIGHDMA |
2104                             NETIF_F_SG |
2105                             NETIF_F_IP_CSUM |
2106                             NETIF_F_SCTP_CSUM |
2107                             NETIF_F_IPV6_CSUM |
2108                             NETIF_F_TSO |
2109                             NETIF_F_TSO6 |
2110                             NETIF_F_RXCSUM |
2111                             NETIF_F_GRO;
2112
2113         if (adapter->vf_res->vf_offload_flags
2114             & I40E_VIRTCHNL_VF_OFFLOAD_VLAN) {
2115                 netdev->vlan_features = netdev->features;
2116                 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX |
2117                                     NETIF_F_HW_VLAN_CTAG_RX |
2118                                     NETIF_F_HW_VLAN_CTAG_FILTER;
2119         }
2120
2121         /* copy netdev features into list of user selectable features */
2122         netdev->hw_features |= netdev->features;
2123         netdev->hw_features &= ~NETIF_F_RXCSUM;
2124
2125         if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
2126                 dev_info(&pdev->dev, "Invalid MAC address %pM, using random\n",
2127                          adapter->hw.mac.addr);
2128                 random_ether_addr(adapter->hw.mac.addr);
2129         }
2130         ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
2131         ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
2132
2133         f = kzalloc(sizeof(*f), GFP_ATOMIC);
2134         if (!f)
2135                 goto err_sw_init;
2136
2137         ether_addr_copy(f->macaddr, adapter->hw.mac.addr);
2138         f->add = true;
2139         adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
2140
2141         list_add(&f->list, &adapter->mac_filter_list);
2142
2143         init_timer(&adapter->watchdog_timer);
2144         adapter->watchdog_timer.function = &i40evf_watchdog_timer;
2145         adapter->watchdog_timer.data = (unsigned long)adapter;
2146         mod_timer(&adapter->watchdog_timer, jiffies + 1);
2147
2148         adapter->num_active_queues = min_t(int,
2149                                            adapter->vsi_res->num_queue_pairs,
2150                                            (int)(num_online_cpus()));
2151         adapter->tx_desc_count = I40EVF_DEFAULT_TXD;
2152         adapter->rx_desc_count = I40EVF_DEFAULT_RXD;
2153         err = i40evf_init_interrupt_scheme(adapter);
2154         if (err)
2155                 goto err_sw_init;
2156         i40evf_map_rings_to_vectors(adapter);
2157         i40evf_configure_rss(adapter);
2158         err = i40evf_request_misc_irq(adapter);
2159         if (err)
2160                 goto err_sw_init;
2161
2162         netif_carrier_off(netdev);
2163
2164         adapter->vsi.id = adapter->vsi_res->vsi_id;
2165         adapter->vsi.seid = adapter->vsi_res->vsi_id; /* dummy */
2166         adapter->vsi.back = adapter;
2167         adapter->vsi.base_vector = 1;
2168         adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
2169         adapter->vsi.rx_itr_setting = (I40E_ITR_DYNAMIC |
2170                                        ITR_REG_TO_USEC(I40E_ITR_RX_DEF));
2171         adapter->vsi.tx_itr_setting = (I40E_ITR_DYNAMIC |
2172                                        ITR_REG_TO_USEC(I40E_ITR_TX_DEF));
2173         adapter->vsi.netdev = adapter->netdev;
2174
2175         if (!adapter->netdev_registered) {
2176                 err = register_netdev(netdev);
2177                 if (err)
2178                         goto err_register;
2179         }
2180
2181         adapter->netdev_registered = true;
2182
2183         netif_tx_stop_all_queues(netdev);
2184
2185         dev_info(&pdev->dev, "MAC address: %pM\n", adapter->hw.mac.addr);
2186         if (netdev->features & NETIF_F_GRO)
2187                 dev_info(&pdev->dev, "GRO is enabled\n");
2188
2189         dev_info(&pdev->dev, "%s\n", i40evf_driver_string);
2190         adapter->state = __I40EVF_DOWN;
2191         set_bit(__I40E_DOWN, &adapter->vsi.state);
2192         i40evf_misc_irq_enable(adapter);
2193         return;
2194 restart:
2195         schedule_delayed_work(&adapter->init_task,
2196                               msecs_to_jiffies(50));
2197         return;
2198
2199 err_register:
2200         i40evf_free_misc_irq(adapter);
2201 err_sw_init:
2202         i40evf_reset_interrupt_capability(adapter);
2203 err_alloc:
2204         kfree(adapter->vf_res);
2205         adapter->vf_res = NULL;
2206 err:
2207         /* Things went into the weeds, so try again later */
2208         if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
2209                 dev_err(&pdev->dev, "Failed to communicate with PF; giving up\n");
2210                 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
2211                 return; /* do not reschedule */
2212         }
2213         schedule_delayed_work(&adapter->init_task, HZ * 3);
2214 }
2215
2216 /**
2217  * i40evf_shutdown - Shutdown the device in preparation for a reboot
2218  * @pdev: pci device structure
2219  **/
2220 static void i40evf_shutdown(struct pci_dev *pdev)
2221 {
2222         struct net_device *netdev = pci_get_drvdata(pdev);
2223         struct i40evf_adapter *adapter = netdev_priv(netdev);
2224
2225         netif_device_detach(netdev);
2226
2227         if (netif_running(netdev))
2228                 i40evf_close(netdev);
2229
2230         /* Prevent the watchdog from running. */
2231         adapter->state = __I40EVF_REMOVE;
2232         adapter->aq_required = 0;
2233
2234 #ifdef CONFIG_PM
2235         pci_save_state(pdev);
2236
2237 #endif
2238         pci_disable_device(pdev);
2239 }
2240
2241 /**
2242  * i40evf_probe - Device Initialization Routine
2243  * @pdev: PCI device information struct
2244  * @ent: entry in i40evf_pci_tbl
2245  *
2246  * Returns 0 on success, negative on failure
2247  *
2248  * i40evf_probe initializes an adapter identified by a pci_dev structure.
2249  * The OS initialization, configuring of the adapter private structure,
2250  * and a hardware reset occur.
2251  **/
2252 static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2253 {
2254         struct net_device *netdev;
2255         struct i40evf_adapter *adapter = NULL;
2256         struct i40e_hw *hw = NULL;
2257         int err;
2258
2259         err = pci_enable_device(pdev);
2260         if (err)
2261                 return err;
2262
2263         err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
2264         if (err) {
2265                 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2266                 if (err) {
2267                         dev_err(&pdev->dev,
2268                                 "DMA configuration failed: 0x%x\n", err);
2269                         goto err_dma;
2270                 }
2271         }
2272
2273         err = pci_request_regions(pdev, i40evf_driver_name);
2274         if (err) {
2275                 dev_err(&pdev->dev,
2276                         "pci_request_regions failed 0x%x\n", err);
2277                 goto err_pci_reg;
2278         }
2279
2280         pci_enable_pcie_error_reporting(pdev);
2281
2282         pci_set_master(pdev);
2283
2284         netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter),
2285                                    MAX_TX_QUEUES);
2286         if (!netdev) {
2287                 err = -ENOMEM;
2288                 goto err_alloc_etherdev;
2289         }
2290
2291         SET_NETDEV_DEV(netdev, &pdev->dev);
2292
2293         pci_set_drvdata(pdev, netdev);
2294         adapter = netdev_priv(netdev);
2295
2296         adapter->netdev = netdev;
2297         adapter->pdev = pdev;
2298
2299         hw = &adapter->hw;
2300         hw->back = adapter;
2301
2302         adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
2303         adapter->state = __I40EVF_STARTUP;
2304
2305         /* Call save state here because it relies on the adapter struct. */
2306         pci_save_state(pdev);
2307
2308         hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
2309                               pci_resource_len(pdev, 0));
2310         if (!hw->hw_addr) {
2311                 err = -EIO;
2312                 goto err_ioremap;
2313         }
2314         hw->vendor_id = pdev->vendor;
2315         hw->device_id = pdev->device;
2316         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2317         hw->subsystem_vendor_id = pdev->subsystem_vendor;
2318         hw->subsystem_device_id = pdev->subsystem_device;
2319         hw->bus.device = PCI_SLOT(pdev->devfn);
2320         hw->bus.func = PCI_FUNC(pdev->devfn);
2321
2322         INIT_LIST_HEAD(&adapter->mac_filter_list);
2323         INIT_LIST_HEAD(&adapter->vlan_filter_list);
2324
2325         INIT_WORK(&adapter->reset_task, i40evf_reset_task);
2326         INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
2327         INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
2328         INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
2329         schedule_delayed_work(&adapter->init_task, 10);
2330
2331         return 0;
2332
2333 err_ioremap:
2334         free_netdev(netdev);
2335 err_alloc_etherdev:
2336         pci_release_regions(pdev);
2337 err_pci_reg:
2338 err_dma:
2339         pci_disable_device(pdev);
2340         return err;
2341 }
2342
2343 #ifdef CONFIG_PM
2344 /**
2345  * i40evf_suspend - Power management suspend routine
2346  * @pdev: PCI device information struct
2347  * @state: unused
2348  *
2349  * Called when the system (VM) is entering sleep/suspend.
2350  **/
2351 static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
2352 {
2353         struct net_device *netdev = pci_get_drvdata(pdev);
2354         struct i40evf_adapter *adapter = netdev_priv(netdev);
2355         int retval = 0;
2356
2357         netif_device_detach(netdev);
2358
2359         if (netif_running(netdev)) {
2360                 rtnl_lock();
2361                 i40evf_down(adapter);
2362                 rtnl_unlock();
2363         }
2364         i40evf_free_misc_irq(adapter);
2365         i40evf_reset_interrupt_capability(adapter);
2366
2367         retval = pci_save_state(pdev);
2368         if (retval)
2369                 return retval;
2370
2371         pci_disable_device(pdev);
2372
2373         return 0;
2374 }
2375
2376 /**
2377  * i40evf_resume - Power management resume routine
2378  * @pdev: PCI device information struct
2379  *
2380  * Called when the system (VM) is resumed from sleep/suspend.
2381  **/
2382 static int i40evf_resume(struct pci_dev *pdev)
2383 {
2384         struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
2385         struct net_device *netdev = adapter->netdev;
2386         u32 err;
2387
2388         pci_set_power_state(pdev, PCI_D0);
2389         pci_restore_state(pdev);
2390         /* pci_restore_state clears dev->state_saved so call
2391          * pci_save_state to restore it.
2392          */
2393         pci_save_state(pdev);
2394
2395         err = pci_enable_device_mem(pdev);
2396         if (err) {
2397                 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
2398                 return err;
2399         }
2400         pci_set_master(pdev);
2401
2402         rtnl_lock();
2403         err = i40evf_set_interrupt_capability(adapter);
2404         if (err) {
2405                 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
2406                 return err;
2407         }
2408         err = i40evf_request_misc_irq(adapter);
2409         rtnl_unlock();
2410         if (err) {
2411                 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
2412                 return err;
2413         }
2414
2415         schedule_work(&adapter->reset_task);
2416
2417         netif_device_attach(netdev);
2418
2419         return err;
2420 }
2421
2422 #endif /* CONFIG_PM */
2423 /**
2424  * i40evf_remove - Device Removal Routine
2425  * @pdev: PCI device information struct
2426  *
2427  * i40evf_remove is called by the PCI subsystem to alert the driver
2428  * that it should release a PCI device.  The could be caused by a
2429  * Hot-Plug event, or because the driver is going to be removed from
2430  * memory.
2431  **/
2432 static void i40evf_remove(struct pci_dev *pdev)
2433 {
2434         struct net_device *netdev = pci_get_drvdata(pdev);
2435         struct i40evf_adapter *adapter = netdev_priv(netdev);
2436         struct i40evf_mac_filter *f, *ftmp;
2437         struct i40e_hw *hw = &adapter->hw;
2438
2439         cancel_delayed_work_sync(&adapter->init_task);
2440         cancel_work_sync(&adapter->reset_task);
2441
2442         if (adapter->netdev_registered) {
2443                 unregister_netdev(netdev);
2444                 adapter->netdev_registered = false;
2445         }
2446
2447         /* Shut down all the garbage mashers on the detention level */
2448         adapter->state = __I40EVF_REMOVE;
2449         adapter->aq_required = 0;
2450         i40evf_request_reset(adapter);
2451         msleep(20);
2452         /* If the FW isn't responding, kick it once, but only once. */
2453         if (!i40evf_asq_done(hw)) {
2454                 i40evf_request_reset(adapter);
2455                 msleep(20);
2456         }
2457
2458         if (adapter->msix_entries) {
2459                 i40evf_misc_irq_disable(adapter);
2460                 i40evf_free_misc_irq(adapter);
2461                 i40evf_reset_interrupt_capability(adapter);
2462                 i40evf_free_q_vectors(adapter);
2463         }
2464
2465         if (adapter->watchdog_timer.function)
2466                 del_timer_sync(&adapter->watchdog_timer);
2467
2468         flush_scheduled_work();
2469
2470         if (hw->aq.asq.count)
2471                 i40evf_shutdown_adminq(hw);
2472
2473         iounmap(hw->hw_addr);
2474         pci_release_regions(pdev);
2475
2476         i40evf_free_all_tx_resources(adapter);
2477         i40evf_free_all_rx_resources(adapter);
2478         i40evf_free_queues(adapter);
2479         kfree(adapter->vf_res);
2480         /* If we got removed before an up/down sequence, we've got a filter
2481          * hanging out there that we need to get rid of.
2482          */
2483         list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
2484                 list_del(&f->list);
2485                 kfree(f);
2486         }
2487         list_for_each_entry_safe(f, ftmp, &adapter->vlan_filter_list, list) {
2488                 list_del(&f->list);
2489                 kfree(f);
2490         }
2491
2492         free_netdev(netdev);
2493
2494         pci_disable_pcie_error_reporting(pdev);
2495
2496         pci_disable_device(pdev);
2497 }
2498
2499 static struct pci_driver i40evf_driver = {
2500         .name     = i40evf_driver_name,
2501         .id_table = i40evf_pci_tbl,
2502         .probe    = i40evf_probe,
2503         .remove   = i40evf_remove,
2504 #ifdef CONFIG_PM
2505         .suspend  = i40evf_suspend,
2506         .resume   = i40evf_resume,
2507 #endif
2508         .shutdown = i40evf_shutdown,
2509 };
2510
2511 /**
2512  * i40e_init_module - Driver Registration Routine
2513  *
2514  * i40e_init_module is the first routine called when the driver is
2515  * loaded. All it does is register with the PCI subsystem.
2516  **/
2517 static int __init i40evf_init_module(void)
2518 {
2519         int ret;
2520
2521         pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
2522                 i40evf_driver_version);
2523
2524         pr_info("%s\n", i40evf_copyright);
2525
2526         ret = pci_register_driver(&i40evf_driver);
2527         return ret;
2528 }
2529
2530 module_init(i40evf_init_module);
2531
2532 /**
2533  * i40e_exit_module - Driver Exit Cleanup Routine
2534  *
2535  * i40e_exit_module is called just before the driver is removed
2536  * from memory.
2537  **/
2538 static void __exit i40evf_exit_module(void)
2539 {
2540         pci_unregister_driver(&i40evf_driver);
2541 }
2542
2543 module_exit(i40evf_exit_module);
2544
2545 /* i40evf_main.c */