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 void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter);
  32 static void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter);
  33 static int i40evf_close(struct net_device *netdev);
  34
  35 char i40evf_driver_name[] = "i40evf";
  36 static const char i40evf_driver_string[] =
  37         "Intel(R) XL710/X710 Virtual Function Network Driver";
  38
  39 #define DRV_VERSION "1.2.25"
  40 const char i40evf_driver_version[] = DRV_VERSION;
  41 static const char i40evf_copyright[] =
  42         "Copyright (c) 2013 - 2014 Intel Corporation.";
  43
  44 /* i40evf_pci_tbl - PCI Device ID Table
  45  *
  46  * Wildcard entries (PCI_ANY_ID) should come last
  47  * Last entry must be all 0s
  48  *
  49  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  50  *   Class, Class Mask, private data (not used) }
  51  */
  52 static const struct pci_device_id i40evf_pci_tbl[] = {
  53         {PCI_VDEVICE(INTEL, I40E_DEV_ID_VF), 0},
  54         /* required last entry */
  55         {0, }
  56 };
  57
  58 MODULE_DEVICE_TABLE(pci, i40evf_pci_tbl);
  59
  60 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
  61 MODULE_DESCRIPTION("Intel(R) XL710 X710 Virtual Function Network Driver");
  62 MODULE_LICENSE("GPL");
  63 MODULE_VERSION(DRV_VERSION);
  64
  65 /**
  66  * i40evf_allocate_dma_mem_d - OS specific memory alloc for shared code
  67  * @hw:   pointer to the HW structure
  68  * @mem:  ptr to mem struct to fill out
  69  * @size: size of memory requested
  70  * @alignment: what to align the allocation to
  71  **/
  72 i40e_status i40evf_allocate_dma_mem_d(struct i40e_hw *hw,
  73                                       struct i40e_dma_mem *mem,
  74                                       u64 size, u32 alignment)
  75 {
  76         struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
  77
  78         if (!mem)
  79                 return I40E_ERR_PARAM;
  80
  81         mem->size = ALIGN(size, alignment);
  82         mem->va = dma_alloc_coherent(&adapter->pdev->dev, mem->size,
  83                                      (dma_addr_t *)&mem->pa, GFP_KERNEL);
  84         if (mem->va)
  85                 return 0;
  86         else
  87                 return I40E_ERR_NO_MEMORY;
  88 }
  89
  90 /**
  91  * i40evf_free_dma_mem_d - OS specific memory free for shared code
  92  * @hw:   pointer to the HW structure
  93  * @mem:  ptr to mem struct to free
  94  **/
  95 i40e_status i40evf_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem)
  96 {
  97         struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
  98
  99         if (!mem || !mem->va)
 100                 return I40E_ERR_PARAM;
 101         dma_free_coherent(&adapter->pdev->dev, mem->size,
 102                           mem->va, (dma_addr_t)mem->pa);
 103         return 0;
 104 }
 105
 106 /**
 107  * i40evf_allocate_virt_mem_d - OS specific memory alloc for shared code
 108  * @hw:   pointer to the HW structure
 109  * @mem:  ptr to mem struct to fill out
 110  * @size: size of memory requested
 111  **/
 112 i40e_status i40evf_allocate_virt_mem_d(struct i40e_hw *hw,
 113                                        struct i40e_virt_mem *mem, u32 size)
 114 {
 115         if (!mem)
 116                 return I40E_ERR_PARAM;
 117
 118         mem->size = size;
 119         mem->va = kzalloc(size, GFP_KERNEL);
 120
 121         if (mem->va)
 122                 return 0;
 123         else
 124                 return I40E_ERR_NO_MEMORY;
 125 }
 126
 127 /**
 128  * i40evf_free_virt_mem_d - OS specific memory free for shared code
 129  * @hw:   pointer to the HW structure
 130  * @mem:  ptr to mem struct to free
 131  **/
 132 i40e_status i40evf_free_virt_mem_d(struct i40e_hw *hw,
 133                                    struct i40e_virt_mem *mem)
 134 {
 135         if (!mem)
 136                 return I40E_ERR_PARAM;
 137
 138         /* it's ok to kfree a NULL pointer */
 139         kfree(mem->va);
 140
 141         return 0;
 142 }
 143
 144 /**
 145  * i40evf_debug_d - OS dependent version of debug printing
 146  * @hw:  pointer to the HW structure
 147  * @mask: debug level mask
 148  * @fmt_str: printf-type format description
 149  **/
 150 void i40evf_debug_d(void *hw, u32 mask, char *fmt_str, ...)
 151 {
 152         char buf[512];
 153         va_list argptr;
 154
 155         if (!(mask & ((struct i40e_hw *)hw)->debug_mask))
 156                 return;
 157
 158         va_start(argptr, fmt_str);
 159         vsnprintf(buf, sizeof(buf), fmt_str, argptr);
 160         va_end(argptr);
 161
 162         /* the debug string is already formatted with a newline */
 163         pr_info("%s", buf);
 164 }
 165
 166 /**
 167  * i40evf_tx_timeout - Respond to a Tx Hang
 168  * @netdev: network interface device structure
 169  **/
 170 static void i40evf_tx_timeout(struct net_device *netdev)
 171 {
 172         struct i40evf_adapter *adapter = netdev_priv(netdev);
 173
 174         adapter->tx_timeout_count++;
 175         if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING)) {
 176                 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
 177                 schedule_work(&adapter->reset_task);
 178         }
 179 }
 180
 181 /**
 182  * i40evf_misc_irq_disable - Mask off interrupt generation on the NIC
 183  * @adapter: board private structure
 184  **/
 185 static void i40evf_misc_irq_disable(struct i40evf_adapter *adapter)
 186 {
 187         struct i40e_hw *hw = &adapter->hw;
 188
 189         wr32(hw, I40E_VFINT_DYN_CTL01, 0);
 190
 191         /* read flush */
 192         rd32(hw, I40E_VFGEN_RSTAT);
 193
 194         synchronize_irq(adapter->msix_entries[0].vector);
 195 }
 196
 197 /**
 198  * i40evf_misc_irq_enable - Enable default interrupt generation settings
 199  * @adapter: board private structure
 200  **/
 201 static void i40evf_misc_irq_enable(struct i40evf_adapter *adapter)
 202 {
 203         struct i40e_hw *hw = &adapter->hw;
 204
 205         wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK |
 206                                        I40E_VFINT_DYN_CTL01_ITR_INDX_MASK);
 207         wr32(hw, I40E_VFINT_ICR0_ENA1, I40E_VFINT_ICR0_ENA_ADMINQ_MASK);
 208
 209         /* read flush */
 210         rd32(hw, I40E_VFGEN_RSTAT);
 211 }
 212
 213 /**
 214  * i40evf_irq_disable - Mask off interrupt generation on the NIC
 215  * @adapter: board private structure
 216  **/
 217 static void i40evf_irq_disable(struct i40evf_adapter *adapter)
 218 {
 219         int i;
 220         struct i40e_hw *hw = &adapter->hw;
 221
 222         if (!adapter->msix_entries)
 223                 return;
 224
 225         for (i = 1; i < adapter->num_msix_vectors; i++) {
 226                 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), 0);
 227                 synchronize_irq(adapter->msix_entries[i].vector);
 228         }
 229         /* read flush */
 230         rd32(hw, I40E_VFGEN_RSTAT);
 231 }
 232
 233 /**
 234  * i40evf_irq_enable_queues - Enable interrupt for specified queues
 235  * @adapter: board private structure
 236  * @mask: bitmap of queues to enable
 237  **/
 238 void i40evf_irq_enable_queues(struct i40evf_adapter *adapter, u32 mask)
 239 {
 240         struct i40e_hw *hw = &adapter->hw;
 241         int i;
 242
 243         for (i = 1; i < adapter->num_msix_vectors; i++) {
 244                 if (mask & (1 << (i - 1))) {
 245                         wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1),
 246                              I40E_VFINT_DYN_CTLN1_INTENA_MASK |
 247                              I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
 248                              I40E_VFINT_DYN_CTLN_CLEARPBA_MASK);
 249                 }
 250         }
 251 }
 252
 253 /**
 254  * i40evf_fire_sw_int - Generate SW interrupt for specified vectors
 255  * @adapter: board private structure
 256  * @mask: bitmap of vectors to trigger
 257  **/
 258 static void i40evf_fire_sw_int(struct i40evf_adapter *adapter, u32 mask)
 259 {
 260         struct i40e_hw *hw = &adapter->hw;
 261         int i;
 262         uint32_t dyn_ctl;
 263
 264         if (mask & 1) {
 265                 dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTL01);
 266                 dyn_ctl |= I40E_VFINT_DYN_CTLN_SWINT_TRIG_MASK |
 267                            I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
 268                            I40E_VFINT_DYN_CTLN_CLEARPBA_MASK;
 269                 wr32(hw, I40E_VFINT_DYN_CTL01, dyn_ctl);
 270         }
 271         for (i = 1; i < adapter->num_msix_vectors; i++) {
 272                 if (mask & (1 << i)) {
 273                         dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTLN1(i - 1));
 274                         dyn_ctl |= I40E_VFINT_DYN_CTLN_SWINT_TRIG_MASK |
 275                                    I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
 276                                    I40E_VFINT_DYN_CTLN_CLEARPBA_MASK;
 277                         wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), dyn_ctl);
 278                 }
 279         }
 280 }
 281
 282 /**
 283  * i40evf_irq_enable - Enable default interrupt generation settings
 284  * @adapter: board private structure
 285  **/
 286 void i40evf_irq_enable(struct i40evf_adapter *adapter, bool flush)
 287 {
 288         struct i40e_hw *hw = &adapter->hw;
 289
 290         i40evf_misc_irq_enable(adapter);
 291         i40evf_irq_enable_queues(adapter, ~0);
 292
 293         if (flush)
 294                 rd32(hw, I40E_VFGEN_RSTAT);
 295 }
 296
 297 /**
 298  * i40evf_msix_aq - Interrupt handler for vector 0
 299  * @irq: interrupt number
 300  * @data: pointer to netdev
 301  **/
 302 static irqreturn_t i40evf_msix_aq(int irq, void *data)
 303 {
 304         struct net_device *netdev = data;
 305         struct i40evf_adapter *adapter = netdev_priv(netdev);
 306         struct i40e_hw *hw = &adapter->hw;
 307         u32 val;
 308         u32 ena_mask;
 309
 310         /* handle non-queue interrupts */
 311         val = rd32(hw, I40E_VFINT_ICR01);
 312         ena_mask = rd32(hw, I40E_VFINT_ICR0_ENA1);
 313
 314
 315         val = rd32(hw, I40E_VFINT_DYN_CTL01);
 316         val = val | I40E_PFINT_DYN_CTL0_CLEARPBA_MASK;
 317         wr32(hw, I40E_VFINT_DYN_CTL01, val);
 318
 319         /* schedule work on the private workqueue */
 320         schedule_work(&adapter->adminq_task);
 321
 322         return IRQ_HANDLED;
 323 }
 324
 325 /**
 326  * i40evf_msix_clean_rings - MSIX mode Interrupt Handler
 327  * @irq: interrupt number
 328  * @data: pointer to a q_vector
 329  **/
 330 static irqreturn_t i40evf_msix_clean_rings(int irq, void *data)
 331 {
 332         struct i40e_q_vector *q_vector = data;
 333
 334         if (!q_vector->tx.ring && !q_vector->rx.ring)
 335                 return IRQ_HANDLED;
 336
 337         napi_schedule(&q_vector->napi);
 338
 339         return IRQ_HANDLED;
 340 }
 341
 342 /**
 343  * i40evf_map_vector_to_rxq - associate irqs with rx queues
 344  * @adapter: board private structure
 345  * @v_idx: interrupt number
 346  * @r_idx: queue number
 347  **/
 348 static void
 349 i40evf_map_vector_to_rxq(struct i40evf_adapter *adapter, int v_idx, int r_idx)
 350 {
 351         struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
 352         struct i40e_ring *rx_ring = adapter->rx_rings[r_idx];
 353
 354         rx_ring->q_vector = q_vector;
 355         rx_ring->next = q_vector->rx.ring;
 356         rx_ring->vsi = &adapter->vsi;
 357         q_vector->rx.ring = rx_ring;
 358         q_vector->rx.count++;
 359         q_vector->rx.latency_range = I40E_LOW_LATENCY;
 360 }
 361
 362 /**
 363  * i40evf_map_vector_to_txq - associate irqs with tx queues
 364  * @adapter: board private structure
 365  * @v_idx: interrupt number
 366  * @t_idx: queue number
 367  **/
 368 static void
 369 i40evf_map_vector_to_txq(struct i40evf_adapter *adapter, int v_idx, int t_idx)
 370 {
 371         struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
 372         struct i40e_ring *tx_ring = adapter->tx_rings[t_idx];
 373
 374         tx_ring->q_vector = q_vector;
 375         tx_ring->next = q_vector->tx.ring;
 376         tx_ring->vsi = &adapter->vsi;
 377         q_vector->tx.ring = tx_ring;
 378         q_vector->tx.count++;
 379         q_vector->tx.latency_range = I40E_LOW_LATENCY;
 380         q_vector->num_ringpairs++;
 381         q_vector->ring_mask |= (1 << t_idx);
 382 }
 383
 384 /**
 385  * i40evf_map_rings_to_vectors - Maps descriptor rings to vectors
 386  * @adapter: board private structure to initialize
 387  *
 388  * This function maps descriptor rings to the queue-specific vectors
 389  * we were allotted through the MSI-X enabling code.  Ideally, we'd have
 390  * one vector per ring/queue, but on a constrained vector budget, we
 391  * group the rings as "efficiently" as possible.  You would add new
 392  * mapping configurations in here.
 393  **/
 394 static int i40evf_map_rings_to_vectors(struct i40evf_adapter *adapter)
 395 {
 396         int q_vectors;
 397         int v_start = 0;
 398         int rxr_idx = 0, txr_idx = 0;
 399         int rxr_remaining = adapter->num_active_queues;
 400         int txr_remaining = adapter->num_active_queues;
 401         int i, j;
 402         int rqpv, tqpv;
 403         int err = 0;
 404
 405         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 406
 407         /* The ideal configuration...
 408          * We have enough vectors to map one per queue.
 409          */
 410         if (q_vectors == (rxr_remaining * 2)) {
 411                 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
 412                         i40evf_map_vector_to_rxq(adapter, v_start, rxr_idx);
 413
 414                 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
 415                         i40evf_map_vector_to_txq(adapter, v_start, txr_idx);
 416                 goto out;
 417         }
 418
 419         /* If we don't have enough vectors for a 1-to-1
 420          * mapping, we'll have to group them so there are
 421          * multiple queues per vector.
 422          * Re-adjusting *qpv takes care of the remainder.
 423          */
 424         for (i = v_start; i < q_vectors; i++) {
 425                 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
 426                 for (j = 0; j < rqpv; j++) {
 427                         i40evf_map_vector_to_rxq(adapter, i, rxr_idx);
 428                         rxr_idx++;
 429                         rxr_remaining--;
 430                 }
 431         }
 432         for (i = v_start; i < q_vectors; i++) {
 433                 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
 434                 for (j = 0; j < tqpv; j++) {
 435                         i40evf_map_vector_to_txq(adapter, i, txr_idx);
 436                         txr_idx++;
 437                         txr_remaining--;
 438                 }
 439         }
 440
 441 out:
 442         adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
 443
 444         return err;
 445 }
 446
 447 /**
 448  * i40evf_request_traffic_irqs - Initialize MSI-X interrupts
 449  * @adapter: board private structure
 450  *
 451  * Allocates MSI-X vectors for tx and rx handling, and requests
 452  * interrupts from the kernel.
 453  **/
 454 static int
 455 i40evf_request_traffic_irqs(struct i40evf_adapter *adapter, char *basename)
 456 {
 457         int vector, err, q_vectors;
 458         int rx_int_idx = 0, tx_int_idx = 0;
 459
 460         i40evf_irq_disable(adapter);
 461         /* Decrement for Other and TCP Timer vectors */
 462         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 463
 464         for (vector = 0; vector < q_vectors; vector++) {
 465                 struct i40e_q_vector *q_vector = adapter->q_vector[vector];
 466
 467                 if (q_vector->tx.ring && q_vector->rx.ring) {
 468                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 469                                  "i40evf-%s-%s-%d", basename,
 470                                  "TxRx", rx_int_idx++);
 471                         tx_int_idx++;
 472                 } else if (q_vector->rx.ring) {
 473                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 474                                  "i40evf-%s-%s-%d", basename,
 475                                  "rx", rx_int_idx++);
 476                 } else if (q_vector->tx.ring) {
 477                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 478                                  "i40evf-%s-%s-%d", basename,
 479                                  "tx", tx_int_idx++);
 480                 } else {
 481                         /* skip this unused q_vector */
 482                         continue;
 483                 }
 484                 err = request_irq(
 485                         adapter->msix_entries[vector + NONQ_VECS].vector,
 486                         i40evf_msix_clean_rings,
 487                         0,
 488                         q_vector->name,
 489                         q_vector);
 490                 if (err) {
 491                         dev_info(&adapter->pdev->dev,
 492                                  "%s: request_irq failed, error: %d\n",
 493                                 __func__, err);
 494                         goto free_queue_irqs;
 495                 }
 496                 /* assign the mask for this irq */
 497                 irq_set_affinity_hint(
 498                         adapter->msix_entries[vector + NONQ_VECS].vector,
 499                         q_vector->affinity_mask);
 500         }
 501
 502         return 0;
 503
 504 free_queue_irqs:
 505         while (vector) {
 506                 vector--;
 507                 irq_set_affinity_hint(
 508                         adapter->msix_entries[vector + NONQ_VECS].vector,
 509                         NULL);
 510                 free_irq(adapter->msix_entries[vector + NONQ_VECS].vector,
 511                          adapter->q_vector[vector]);
 512         }
 513         return err;
 514 }
 515
 516 /**
 517  * i40evf_request_misc_irq - Initialize MSI-X interrupts
 518  * @adapter: board private structure
 519  *
 520  * Allocates MSI-X vector 0 and requests interrupts from the kernel. This
 521  * vector is only for the admin queue, and stays active even when the netdev
 522  * is closed.
 523  **/
 524 static int i40evf_request_misc_irq(struct i40evf_adapter *adapter)
 525 {
 526         struct net_device *netdev = adapter->netdev;
 527         int err;
 528
 529         snprintf(adapter->misc_vector_name,
 530                  sizeof(adapter->misc_vector_name) - 1, "i40evf-%s:mbx",
 531                  dev_name(&adapter->pdev->dev));
 532         err = request_irq(adapter->msix_entries[0].vector,
 533                           &i40evf_msix_aq, 0,
 534                           adapter->misc_vector_name, netdev);
 535         if (err) {
 536                 dev_err(&adapter->pdev->dev,
 537                         "request_irq for %s failed: %d\n",
 538                         adapter->misc_vector_name, err);
 539                 free_irq(adapter->msix_entries[0].vector, netdev);
 540         }
 541         return err;
 542 }
 543
 544 /**
 545  * i40evf_free_traffic_irqs - Free MSI-X interrupts
 546  * @adapter: board private structure
 547  *
 548  * Frees all MSI-X vectors other than 0.
 549  **/
 550 static void i40evf_free_traffic_irqs(struct i40evf_adapter *adapter)
 551 {
 552         int i;
 553         int q_vectors;
 554
 555         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 556
 557         for (i = 0; i < q_vectors; i++) {
 558                 irq_set_affinity_hint(adapter->msix_entries[i+1].vector,
 559                                       NULL);
 560                 free_irq(adapter->msix_entries[i+1].vector,
 561                          adapter->q_vector[i]);
 562         }
 563 }
 564
 565 /**
 566  * i40evf_free_misc_irq - Free MSI-X miscellaneous vector
 567  * @adapter: board private structure
 568  *
 569  * Frees MSI-X vector 0.
 570  **/
 571 static void i40evf_free_misc_irq(struct i40evf_adapter *adapter)
 572 {
 573         struct net_device *netdev = adapter->netdev;
 574
 575         free_irq(adapter->msix_entries[0].vector, netdev);
 576 }
 577
 578 /**
 579  * i40evf_configure_tx - Configure Transmit Unit after Reset
 580  * @adapter: board private structure
 581  *
 582  * Configure the Tx unit of the MAC after a reset.
 583  **/
 584 static void i40evf_configure_tx(struct i40evf_adapter *adapter)
 585 {
 586         struct i40e_hw *hw = &adapter->hw;
 587         int i;
 588
 589         for (i = 0; i < adapter->num_active_queues; i++)
 590                 adapter->tx_rings[i]->tail = hw->hw_addr + I40E_QTX_TAIL1(i);
 591 }
 592
 593 /**
 594  * i40evf_configure_rx - Configure Receive Unit after Reset
 595  * @adapter: board private structure
 596  *
 597  * Configure the Rx unit of the MAC after a reset.
 598  **/
 599 static void i40evf_configure_rx(struct i40evf_adapter *adapter)
 600 {
 601         struct i40e_hw *hw = &adapter->hw;
 602         struct net_device *netdev = adapter->netdev;
 603         int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
 604         int i;
 605         int rx_buf_len;
 606
 607
 608         adapter->flags &= ~I40EVF_FLAG_RX_PS_CAPABLE;
 609         adapter->flags |= I40EVF_FLAG_RX_1BUF_CAPABLE;
 610
 611         /* Decide whether to use packet split mode or not */
 612         if (netdev->mtu > ETH_DATA_LEN) {
 613                 if (adapter->flags & I40EVF_FLAG_RX_PS_CAPABLE)
 614                         adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
 615                 else
 616                         adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
 617         } else {
 618                 if (adapter->flags & I40EVF_FLAG_RX_1BUF_CAPABLE)
 619                         adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
 620                 else
 621                         adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
 622         }
 623
 624         /* Set the RX buffer length according to the mode */
 625         if (adapter->flags & I40EVF_FLAG_RX_PS_ENABLED) {
 626                 rx_buf_len = I40E_RX_HDR_SIZE;
 627         } else {
 628                 if (netdev->mtu <= ETH_DATA_LEN)
 629                         rx_buf_len = I40EVF_RXBUFFER_2048;
 630                 else
 631                         rx_buf_len = ALIGN(max_frame, 1024);
 632         }
 633
 634         for (i = 0; i < adapter->num_active_queues; i++) {
 635                 adapter->rx_rings[i]->tail = hw->hw_addr + I40E_QRX_TAIL1(i);
 636                 adapter->rx_rings[i]->rx_buf_len = rx_buf_len;
 637         }
 638 }
 639
 640 /**
 641  * i40evf_find_vlan - Search filter list for specific vlan filter
 642  * @adapter: board private structure
 643  * @vlan: vlan tag
 644  *
 645  * Returns ptr to the filter object or NULL
 646  **/
 647 static struct
 648 i40evf_vlan_filter *i40evf_find_vlan(struct i40evf_adapter *adapter, u16 vlan)
 649 {
 650         struct i40evf_vlan_filter *f;
 651
 652         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
 653                 if (vlan == f->vlan)
 654                         return f;
 655         }
 656         return NULL;
 657 }
 658
 659 /**
 660  * i40evf_add_vlan - Add a vlan filter to the list
 661  * @adapter: board private structure
 662  * @vlan: VLAN tag
 663  *
 664  * Returns ptr to the filter object or NULL when no memory available.
 665  **/
 666 static struct
 667 i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan)
 668 {
 669         struct i40evf_vlan_filter *f;
 670
 671         f = i40evf_find_vlan(adapter, vlan);
 672         if (!f) {
 673                 f = kzalloc(sizeof(*f), GFP_ATOMIC);
 674                 if (!f)
 675                         return NULL;
 676
 677                 f->vlan = vlan;
 678
 679                 INIT_LIST_HEAD(&f->list);
 680                 list_add(&f->list, &adapter->vlan_filter_list);
 681                 f->add = true;
 682                 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
 683         }
 684
 685         return f;
 686 }
 687
 688 /**
 689  * i40evf_del_vlan - Remove a vlan filter from the list
 690  * @adapter: board private structure
 691  * @vlan: VLAN tag
 692  **/
 693 static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan)
 694 {
 695         struct i40evf_vlan_filter *f;
 696
 697         f = i40evf_find_vlan(adapter, vlan);
 698         if (f) {
 699                 f->remove = true;
 700                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
 701         }
 702 }
 703
 704 /**
 705  * i40evf_vlan_rx_add_vid - Add a VLAN filter to a device
 706  * @netdev: network device struct
 707  * @vid: VLAN tag
 708  **/
 709 static int i40evf_vlan_rx_add_vid(struct net_device *netdev,
 710                                   __always_unused __be16 proto, u16 vid)
 711 {
 712         struct i40evf_adapter *adapter = netdev_priv(netdev);
 713
 714         if (i40evf_add_vlan(adapter, vid) == NULL)
 715                 return -ENOMEM;
 716         return 0;
 717 }
 718
 719 /**
 720  * i40evf_vlan_rx_kill_vid - Remove a VLAN filter from a device
 721  * @netdev: network device struct
 722  * @vid: VLAN tag
 723  **/
 724 static int i40evf_vlan_rx_kill_vid(struct net_device *netdev,
 725                                    __always_unused __be16 proto, u16 vid)
 726 {
 727         struct i40evf_adapter *adapter = netdev_priv(netdev);
 728
 729         i40evf_del_vlan(adapter, vid);
 730         return 0;
 731 }
 732
 733 /**
 734  * i40evf_find_filter - Search filter list for specific mac filter
 735  * @adapter: board private structure
 736  * @macaddr: the MAC address
 737  *
 738  * Returns ptr to the filter object or NULL
 739  **/
 740 static struct
 741 i40evf_mac_filter *i40evf_find_filter(struct i40evf_adapter *adapter,
 742                                       u8 *macaddr)
 743 {
 744         struct i40evf_mac_filter *f;
 745
 746         if (!macaddr)
 747                 return NULL;
 748
 749         list_for_each_entry(f, &adapter->mac_filter_list, list) {
 750                 if (ether_addr_equal(macaddr, f->macaddr))
 751                         return f;
 752         }
 753         return NULL;
 754 }
 755
 756 /**
 757  * i40e_add_filter - Add a mac filter to the filter list
 758  * @adapter: board private structure
 759  * @macaddr: the MAC address
 760  *
 761  * Returns ptr to the filter object or NULL when no memory available.
 762  **/
 763 static struct
 764 i40evf_mac_filter *i40evf_add_filter(struct i40evf_adapter *adapter,
 765                                      u8 *macaddr)
 766 {
 767         struct i40evf_mac_filter *f;
 768         int count = 50;
 769
 770         if (!macaddr)
 771                 return NULL;
 772
 773         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 774                                 &adapter->crit_section)) {
 775                 udelay(1);
 776                 if (--count == 0)
 777                         return NULL;
 778         }
 779
 780         f = i40evf_find_filter(adapter, macaddr);
 781         if (!f) {
 782                 f = kzalloc(sizeof(*f), GFP_ATOMIC);
 783                 if (!f) {
 784                         clear_bit(__I40EVF_IN_CRITICAL_TASK,
 785                                   &adapter->crit_section);
 786                         return NULL;
 787                 }
 788
 789                 ether_addr_copy(f->macaddr, macaddr);
 790
 791                 list_add(&f->list, &adapter->mac_filter_list);
 792                 f->add = true;
 793                 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
 794         }
 795
 796         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 797         return f;
 798 }
 799
 800 /**
 801  * i40evf_set_mac - NDO callback to set port mac address
 802  * @netdev: network interface device structure
 803  * @p: pointer to an address structure
 804  *
 805  * Returns 0 on success, negative on failure
 806  **/
 807 static int i40evf_set_mac(struct net_device *netdev, void *p)
 808 {
 809         struct i40evf_adapter *adapter = netdev_priv(netdev);
 810         struct i40e_hw *hw = &adapter->hw;
 811         struct i40evf_mac_filter *f;
 812         struct sockaddr *addr = p;
 813
 814         if (!is_valid_ether_addr(addr->sa_data))
 815                 return -EADDRNOTAVAIL;
 816
 817         if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
 818                 return 0;
 819
 820         f = i40evf_add_filter(adapter, addr->sa_data);
 821         if (f) {
 822                 ether_addr_copy(hw->mac.addr, addr->sa_data);
 823                 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
 824         }
 825
 826         return (f == NULL) ? -ENOMEM : 0;
 827 }
 828
 829 /**
 830  * i40evf_set_rx_mode - NDO callback to set the netdev filters
 831  * @netdev: network interface device structure
 832  **/
 833 static void i40evf_set_rx_mode(struct net_device *netdev)
 834 {
 835         struct i40evf_adapter *adapter = netdev_priv(netdev);
 836         struct i40evf_mac_filter *f, *ftmp;
 837         struct netdev_hw_addr *uca;
 838         struct netdev_hw_addr *mca;
 839         int count = 50;
 840
 841         /* add addr if not already in the filter list */
 842         netdev_for_each_uc_addr(uca, netdev) {
 843                 i40evf_add_filter(adapter, uca->addr);
 844         }
 845         netdev_for_each_mc_addr(mca, netdev) {
 846                 i40evf_add_filter(adapter, mca->addr);
 847         }
 848
 849         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 850                                 &adapter->crit_section)) {
 851                 udelay(1);
 852                 if (--count == 0) {
 853                         dev_err(&adapter->pdev->dev,
 854                                 "Failed to get lock in %s\n", __func__);
 855                         return;
 856                 }
 857         }
 858         /* remove filter if not in netdev list */
 859         list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
 860                 bool found = false;
 861
 862                 if (is_multicast_ether_addr(f->macaddr)) {
 863                         netdev_for_each_mc_addr(mca, netdev) {
 864                                 if (ether_addr_equal(mca->addr, f->macaddr)) {
 865                                         found = true;
 866                                         break;
 867                                 }
 868                         }
 869                 } else {
 870                         netdev_for_each_uc_addr(uca, netdev) {
 871                                 if (ether_addr_equal(uca->addr, f->macaddr)) {
 872                                         found = true;
 873                                         break;
 874                                 }
 875                         }
 876                 }
 877                 if (found) {
 878                         f->remove = true;
 879                         adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
 880                 }
 881         }
 882         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 883 }
 884
 885 /**
 886  * i40evf_napi_enable_all - enable NAPI on all queue vectors
 887  * @adapter: board private structure
 888  **/
 889 static void i40evf_napi_enable_all(struct i40evf_adapter *adapter)
 890 {
 891         int q_idx;
 892         struct i40e_q_vector *q_vector;
 893         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 894
 895         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
 896                 struct napi_struct *napi;
 897
 898                 q_vector = adapter->q_vector[q_idx];
 899                 napi = &q_vector->napi;
 900                 napi_enable(napi);
 901         }
 902 }
 903
 904 /**
 905  * i40evf_napi_disable_all - disable NAPI on all queue vectors
 906  * @adapter: board private structure
 907  **/
 908 static void i40evf_napi_disable_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                 q_vector = adapter->q_vector[q_idx];
 916                 napi_disable(&q_vector->napi);
 917         }
 918 }
 919
 920 /**
 921  * i40evf_configure - set up transmit and receive data structures
 922  * @adapter: board private structure
 923  **/
 924 static void i40evf_configure(struct i40evf_adapter *adapter)
 925 {
 926         struct net_device *netdev = adapter->netdev;
 927         int i;
 928
 929         i40evf_set_rx_mode(netdev);
 930
 931         i40evf_configure_tx(adapter);
 932         i40evf_configure_rx(adapter);
 933         adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
 934
 935         for (i = 0; i < adapter->num_active_queues; i++) {
 936                 struct i40e_ring *ring = adapter->rx_rings[i];
 937
 938                 i40evf_alloc_rx_buffers_1buf(ring, ring->count);
 939                 ring->next_to_use = ring->count - 1;
 940                 writel(ring->next_to_use, ring->tail);
 941         }
 942 }
 943
 944 /**
 945  * i40evf_up_complete - Finish the last steps of bringing up a connection
 946  * @adapter: board private structure
 947  **/
 948 static int i40evf_up_complete(struct i40evf_adapter *adapter)
 949 {
 950         adapter->state = __I40EVF_RUNNING;
 951         clear_bit(__I40E_DOWN, &adapter->vsi.state);
 952
 953         i40evf_napi_enable_all(adapter);
 954
 955         adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES;
 956         mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
 957         return 0;
 958 }
 959
 960 /**
 961  * i40e_down - Shutdown the connection processing
 962  * @adapter: board private structure
 963  **/
 964 void i40evf_down(struct i40evf_adapter *adapter)
 965 {
 966         struct net_device *netdev = adapter->netdev;
 967         struct i40evf_mac_filter *f;
 968
 969         if (adapter->state == __I40EVF_DOWN)
 970                 return;
 971
 972         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 973                                 &adapter->crit_section))
 974                 usleep_range(500, 1000);
 975
 976         i40evf_irq_disable(adapter);
 977         i40evf_napi_disable_all(adapter);
 978
 979         /* remove all MAC filters */
 980         list_for_each_entry(f, &adapter->mac_filter_list, list) {
 981                 f->remove = true;
 982         }
 983         /* remove all VLAN filters */
 984         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
 985                 f->remove = true;
 986         }
 987         if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) &&
 988             adapter->state != __I40EVF_RESETTING) {
 989                 /* cancel any current operation */
 990                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
 991                 adapter->aq_pending = 0;
 992                 /* Schedule operations to close down the HW. Don't wait
 993                  * here for this to complete. The watchdog is still running
 994                  * and it will take care of this.
 995                  */
 996                 adapter->aq_required = I40EVF_FLAG_AQ_DEL_MAC_FILTER;
 997                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
 998                 adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
 999         }
1000         netif_tx_disable(netdev);
1001
1002         netif_tx_stop_all_queues(netdev);
1003
1004         msleep(20);
1005
1006         netif_carrier_off(netdev);
1007         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1008 }
1009
1010 /**
1011  * i40evf_acquire_msix_vectors - Setup the MSIX capability
1012  * @adapter: board private structure
1013  * @vectors: number of vectors to request
1014  *
1015  * Work with the OS to set up the MSIX vectors needed.
1016  *
1017  * Returns 0 on success, negative on failure
1018  **/
1019 static int
1020 i40evf_acquire_msix_vectors(struct i40evf_adapter *adapter, int vectors)
1021 {
1022         int err, vector_threshold;
1023
1024         /* We'll want at least 3 (vector_threshold):
1025          * 0) Other (Admin Queue and link, mostly)
1026          * 1) TxQ[0] Cleanup
1027          * 2) RxQ[0] Cleanup
1028          */
1029         vector_threshold = MIN_MSIX_COUNT;
1030
1031         /* The more we get, the more we will assign to Tx/Rx Cleanup
1032          * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1033          * Right now, we simply care about how many we'll get; we'll
1034          * set them up later while requesting irq's.
1035          */
1036         err = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
1037                                     vector_threshold, vectors);
1038         if (err < 0) {
1039                 dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts\n");
1040                 kfree(adapter->msix_entries);
1041                 adapter->msix_entries = NULL;
1042                 return err;
1043         }
1044
1045         /* Adjust for only the vectors we'll use, which is minimum
1046          * of max_msix_q_vectors + NONQ_VECS, or the number of
1047          * vectors we were allocated.
1048          */
1049         adapter->num_msix_vectors = err;
1050         return 0;
1051 }
1052
1053 /**
1054  * i40evf_free_queues - Free memory for all rings
1055  * @adapter: board private structure to initialize
1056  *
1057  * Free all of the memory associated with queue pairs.
1058  **/
1059 static void i40evf_free_queues(struct i40evf_adapter *adapter)
1060 {
1061         int i;
1062
1063         if (!adapter->vsi_res)
1064                 return;
1065         for (i = 0; i < adapter->num_active_queues; i++) {
1066                 if (adapter->tx_rings[i])
1067                         kfree_rcu(adapter->tx_rings[i], rcu);
1068                 adapter->tx_rings[i] = NULL;
1069                 adapter->rx_rings[i] = NULL;
1070         }
1071 }
1072
1073 /**
1074  * i40evf_alloc_queues - Allocate memory for all rings
1075  * @adapter: board private structure to initialize
1076  *
1077  * We allocate one ring per queue at run-time since we don't know the
1078  * number of queues at compile-time.  The polling_netdev array is
1079  * intended for Multiqueue, but should work fine with a single queue.
1080  **/
1081 static int i40evf_alloc_queues(struct i40evf_adapter *adapter)
1082 {
1083         int i;
1084
1085         for (i = 0; i < adapter->num_active_queues; i++) {
1086                 struct i40e_ring *tx_ring;
1087                 struct i40e_ring *rx_ring;
1088
1089                 tx_ring = kzalloc(sizeof(*tx_ring) * 2, GFP_KERNEL);
1090                 if (!tx_ring)
1091                         goto err_out;
1092
1093                 tx_ring->queue_index = i;
1094                 tx_ring->netdev = adapter->netdev;
1095                 tx_ring->dev = &adapter->pdev->dev;
1096                 tx_ring->count = adapter->tx_desc_count;
1097                 adapter->tx_rings[i] = tx_ring;
1098
1099                 rx_ring = &tx_ring[1];
1100                 rx_ring->queue_index = i;
1101                 rx_ring->netdev = adapter->netdev;
1102                 rx_ring->dev = &adapter->pdev->dev;
1103                 rx_ring->count = adapter->rx_desc_count;
1104                 adapter->rx_rings[i] = rx_ring;
1105         }
1106
1107         return 0;
1108
1109 err_out:
1110         i40evf_free_queues(adapter);
1111         return -ENOMEM;
1112 }
1113
1114 /**
1115  * i40evf_set_interrupt_capability - set MSI-X or FAIL if not supported
1116  * @adapter: board private structure to initialize
1117  *
1118  * Attempt to configure the interrupts using the best available
1119  * capabilities of the hardware and the kernel.
1120  **/
1121 static int i40evf_set_interrupt_capability(struct i40evf_adapter *adapter)
1122 {
1123         int vector, v_budget;
1124         int pairs = 0;
1125         int err = 0;
1126
1127         if (!adapter->vsi_res) {
1128                 err = -EIO;
1129                 goto out;
1130         }
1131         pairs = adapter->num_active_queues;
1132
1133         /* It's easy to be greedy for MSI-X vectors, but it really
1134          * doesn't do us much good if we have a lot more vectors
1135          * than CPU's.  So let's be conservative and only ask for
1136          * (roughly) twice the number of vectors as there are CPU's.
1137          */
1138         v_budget = min_t(int, pairs, (int)(num_online_cpus() * 2)) + NONQ_VECS;
1139         v_budget = min_t(int, v_budget, (int)adapter->vf_res->max_vectors);
1140
1141         adapter->msix_entries = kcalloc(v_budget,
1142                                         sizeof(struct msix_entry), GFP_KERNEL);
1143         if (!adapter->msix_entries) {
1144                 err = -ENOMEM;
1145                 goto out;
1146         }
1147
1148         for (vector = 0; vector < v_budget; vector++)
1149                 adapter->msix_entries[vector].entry = vector;
1150
1151         i40evf_acquire_msix_vectors(adapter, v_budget);
1152
1153 out:
1154         adapter->netdev->real_num_tx_queues = pairs;
1155         return err;
1156 }
1157
1158 /**
1159  * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors
1160  * @adapter: board private structure to initialize
1161  *
1162  * We allocate one q_vector per queue interrupt.  If allocation fails we
1163  * return -ENOMEM.
1164  **/
1165 static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
1166 {
1167         int q_idx, num_q_vectors;
1168         struct i40e_q_vector *q_vector;
1169
1170         num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1171
1172         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1173                 q_vector = kzalloc(sizeof(*q_vector), GFP_KERNEL);
1174                 if (!q_vector)
1175                         goto err_out;
1176                 q_vector->adapter = adapter;
1177                 q_vector->vsi = &adapter->vsi;
1178                 q_vector->v_idx = q_idx;
1179                 netif_napi_add(adapter->netdev, &q_vector->napi,
1180                                i40evf_napi_poll, NAPI_POLL_WEIGHT);
1181                 adapter->q_vector[q_idx] = q_vector;
1182         }
1183
1184         return 0;
1185
1186 err_out:
1187         while (q_idx) {
1188                 q_idx--;
1189                 q_vector = adapter->q_vector[q_idx];
1190                 netif_napi_del(&q_vector->napi);
1191                 kfree(q_vector);
1192                 adapter->q_vector[q_idx] = NULL;
1193         }
1194         return -ENOMEM;
1195 }
1196
1197 /**
1198  * i40evf_free_q_vectors - Free memory allocated for interrupt vectors
1199  * @adapter: board private structure to initialize
1200  *
1201  * This function frees the memory allocated to the q_vectors.  In addition if
1202  * NAPI is enabled it will delete any references to the NAPI struct prior
1203  * to freeing the q_vector.
1204  **/
1205 static void i40evf_free_q_vectors(struct i40evf_adapter *adapter)
1206 {
1207         int q_idx, num_q_vectors;
1208         int napi_vectors;
1209
1210         num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1211         napi_vectors = adapter->num_active_queues;
1212
1213         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1214                 struct i40e_q_vector *q_vector = adapter->q_vector[q_idx];
1215
1216                 adapter->q_vector[q_idx] = NULL;
1217                 if (q_idx < napi_vectors)
1218                         netif_napi_del(&q_vector->napi);
1219                 kfree(q_vector);
1220         }
1221 }
1222
1223 /**
1224  * i40evf_reset_interrupt_capability - Reset MSIX setup
1225  * @adapter: board private structure
1226  *
1227  **/
1228 void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
1229 {
1230         pci_disable_msix(adapter->pdev);
1231         kfree(adapter->msix_entries);
1232         adapter->msix_entries = NULL;
1233 }
1234
1235 /**
1236  * i40evf_init_interrupt_scheme - Determine if MSIX is supported and init
1237  * @adapter: board private structure to initialize
1238  *
1239  **/
1240 int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter)
1241 {
1242         int err;
1243
1244         err = i40evf_set_interrupt_capability(adapter);
1245         if (err) {
1246                 dev_err(&adapter->pdev->dev,
1247                         "Unable to setup interrupt capabilities\n");
1248                 goto err_set_interrupt;
1249         }
1250
1251         err = i40evf_alloc_q_vectors(adapter);
1252         if (err) {
1253                 dev_err(&adapter->pdev->dev,
1254                         "Unable to allocate memory for queue vectors\n");
1255                 goto err_alloc_q_vectors;
1256         }
1257
1258         err = i40evf_alloc_queues(adapter);
1259         if (err) {
1260                 dev_err(&adapter->pdev->dev,
1261                         "Unable to allocate memory for queues\n");
1262                 goto err_alloc_queues;
1263         }
1264
1265         dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
1266                  (adapter->num_active_queues > 1) ? "Enabled" : "Disabled",
1267                  adapter->num_active_queues);
1268
1269         return 0;
1270 err_alloc_queues:
1271         i40evf_free_q_vectors(adapter);
1272 err_alloc_q_vectors:
1273         i40evf_reset_interrupt_capability(adapter);
1274 err_set_interrupt:
1275         return err;
1276 }
1277
1278 /**
1279  * i40evf_watchdog_timer - Periodic call-back timer
1280  * @data: pointer to adapter disguised as unsigned long
1281  **/
1282 static void i40evf_watchdog_timer(unsigned long data)
1283 {
1284         struct i40evf_adapter *adapter = (struct i40evf_adapter *)data;
1285
1286         schedule_work(&adapter->watchdog_task);
1287         /* timer will be rescheduled in watchdog task */
1288 }
1289
1290 /**
1291  * i40evf_watchdog_task - Periodic call-back task
1292  * @work: pointer to work_struct
1293  **/
1294 static void i40evf_watchdog_task(struct work_struct *work)
1295 {
1296         struct i40evf_adapter *adapter = container_of(work,
1297                                                       struct i40evf_adapter,
1298                                                       watchdog_task);
1299         struct i40e_hw *hw = &adapter->hw;
1300         uint32_t rstat_val;
1301
1302         if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
1303                 goto restart_watchdog;
1304
1305         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1306                 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1307                             I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1308                 if ((rstat_val == I40E_VFR_VFACTIVE) ||
1309                     (rstat_val == I40E_VFR_COMPLETED)) {
1310                         /* A chance for redemption! */
1311                         dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
1312                         adapter->state = __I40EVF_STARTUP;
1313                         adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1314                         schedule_delayed_work(&adapter->init_task, 10);
1315                         clear_bit(__I40EVF_IN_CRITICAL_TASK,
1316                                   &adapter->crit_section);
1317                         /* Don't reschedule the watchdog, since we've restarted
1318                          * the init task. When init_task contacts the PF and
1319                          * gets everything set up again, it'll restart the
1320                          * watchdog for us. Down, boy. Sit. Stay. Woof.
1321                          */
1322                         return;
1323                 }
1324                 adapter->aq_pending = 0;
1325                 adapter->aq_required = 0;
1326                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1327                 goto watchdog_done;
1328         }
1329
1330         if ((adapter->state < __I40EVF_DOWN) ||
1331             (adapter->flags & I40EVF_FLAG_RESET_PENDING))
1332                 goto watchdog_done;
1333
1334         /* check for reset */
1335         rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1336                     I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1337         if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) &&
1338             (rstat_val != I40E_VFR_VFACTIVE) &&
1339             (rstat_val != I40E_VFR_COMPLETED)) {
1340                 adapter->state = __I40EVF_RESETTING;
1341                 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1342                 dev_err(&adapter->pdev->dev, "Hardware reset detected\n");
1343                 schedule_work(&adapter->reset_task);
1344                 adapter->aq_pending = 0;
1345                 adapter->aq_required = 0;
1346                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1347                 goto watchdog_done;
1348         }
1349
1350         /* Process admin queue tasks. After init, everything gets done
1351          * here so we don't race on the admin queue.
1352          */
1353         if (adapter->aq_pending) {
1354                 if (!i40evf_asq_done(hw)) {
1355                         dev_dbg(&adapter->pdev->dev, "Admin queue timeout\n");
1356                         i40evf_send_api_ver(adapter);
1357                 }
1358                 goto watchdog_done;
1359         }
1360
1361         if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
1362                 i40evf_map_queues(adapter);
1363                 goto watchdog_done;
1364         }
1365
1366         if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
1367                 i40evf_add_ether_addrs(adapter);
1368                 goto watchdog_done;
1369         }
1370
1371         if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
1372                 i40evf_add_vlans(adapter);
1373                 goto watchdog_done;
1374         }
1375
1376         if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
1377                 i40evf_del_ether_addrs(adapter);
1378                 goto watchdog_done;
1379         }
1380
1381         if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
1382                 i40evf_del_vlans(adapter);
1383                 goto watchdog_done;
1384         }
1385
1386         if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
1387                 i40evf_disable_queues(adapter);
1388                 goto watchdog_done;
1389         }
1390
1391         if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
1392                 i40evf_configure_queues(adapter);
1393                 goto watchdog_done;
1394         }
1395
1396         if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
1397                 i40evf_enable_queues(adapter);
1398                 goto watchdog_done;
1399         }
1400
1401         if (adapter->state == __I40EVF_RUNNING)
1402                 i40evf_request_stats(adapter);
1403 watchdog_done:
1404         if (adapter->state == __I40EVF_RUNNING) {
1405                 i40evf_irq_enable_queues(adapter, ~0);
1406                 i40evf_fire_sw_int(adapter, 0xFF);
1407         } else {
1408                 i40evf_fire_sw_int(adapter, 0x1);
1409         }
1410
1411         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1412 restart_watchdog:
1413         if (adapter->state == __I40EVF_REMOVE)
1414                 return;
1415         if (adapter->aq_required)
1416                 mod_timer(&adapter->watchdog_timer,
1417                           jiffies + msecs_to_jiffies(20));
1418         else
1419                 mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
1420         schedule_work(&adapter->adminq_task);
1421 }
1422
1423 /**
1424  * next_queue - increment to next available tx queue
1425  * @adapter: board private structure
1426  * @j: queue counter
1427  *
1428  * Helper function for RSS programming to increment through available
1429  * queus. Returns the next queue value.
1430  **/
1431 static int next_queue(struct i40evf_adapter *adapter, int j)
1432 {
1433         j += 1;
1434
1435         return j >= adapter->num_active_queues ? 0 : j;
1436 }
1437
1438 /**
1439  * i40evf_configure_rss - Prepare for RSS if used
1440  * @adapter: board private structure
1441  **/
1442 static void i40evf_configure_rss(struct i40evf_adapter *adapter)
1443 {
1444         u32 rss_key[I40E_VFQF_HKEY_MAX_INDEX + 1];
1445         struct i40e_hw *hw = &adapter->hw;
1446         u32 lut = 0;
1447         int i, j;
1448         u64 hena;
1449
1450         /* No RSS for single queue. */
1451         if (adapter->num_active_queues == 1) {
1452                 wr32(hw, I40E_VFQF_HENA(0), 0);
1453                 wr32(hw, I40E_VFQF_HENA(1), 0);
1454                 return;
1455         }
1456
1457         /* Hash type is configured by the PF - we just supply the key */
1458         netdev_rss_key_fill(rss_key, sizeof(rss_key));
1459         for (i = 0; i <= I40E_VFQF_HKEY_MAX_INDEX; i++)
1460                 wr32(hw, I40E_VFQF_HKEY(i), rss_key[i]);
1461
1462         /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
1463         hena = I40E_DEFAULT_RSS_HENA;
1464         wr32(hw, I40E_VFQF_HENA(0), (u32)hena);
1465         wr32(hw, I40E_VFQF_HENA(1), (u32)(hena >> 32));
1466
1467         /* Populate the LUT with max no. of queues in round robin fashion */
1468         j = adapter->num_active_queues;
1469         for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++) {
1470                 j = next_queue(adapter, j);
1471                 lut = j;
1472                 j = next_queue(adapter, j);
1473                 lut |= j << 8;
1474                 j = next_queue(adapter, j);
1475                 lut |= j << 16;
1476                 j = next_queue(adapter, j);
1477                 lut |= j << 24;
1478                 wr32(hw, I40E_VFQF_HLUT(i), lut);
1479         }
1480         i40e_flush(hw);
1481 }
1482
1483 #define I40EVF_RESET_WAIT_MS 100
1484 #define I40EVF_RESET_WAIT_COUNT 200
1485 /**
1486  * i40evf_reset_task - Call-back task to handle hardware reset
1487  * @work: pointer to work_struct
1488  *
1489  * During reset we need to shut down and reinitialize the admin queue
1490  * before we can use it to communicate with the PF again. We also clear
1491  * and reinit the rings because that context is lost as well.
1492  **/
1493 static void i40evf_reset_task(struct work_struct *work)
1494 {
1495         struct i40evf_adapter *adapter = container_of(work,
1496                                                       struct i40evf_adapter,
1497                                                       reset_task);
1498         struct net_device *netdev = adapter->netdev;
1499         struct i40e_hw *hw = &adapter->hw;
1500         struct i40evf_mac_filter *f;
1501         uint32_t rstat_val;
1502         int i = 0, err;
1503
1504         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1505                                 &adapter->crit_section))
1506                 usleep_range(500, 1000);
1507
1508         if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) {
1509                 dev_info(&adapter->pdev->dev, "Requesting reset from PF\n");
1510                 i40evf_request_reset(adapter);
1511         }
1512
1513         /* poll until we see the reset actually happen */
1514         for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1515                 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1516                             I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1517                 if ((rstat_val != I40E_VFR_VFACTIVE) &&
1518                     (rstat_val != I40E_VFR_COMPLETED))
1519                         break;
1520                 msleep(I40EVF_RESET_WAIT_MS);
1521         }
1522         if (i == I40EVF_RESET_WAIT_COUNT) {
1523                 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1524                 goto continue_reset; /* act like the reset happened */
1525         }
1526
1527         /* wait until the reset is complete and the PF is responding to us */
1528         for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1529                 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1530                             I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1531                 if ((rstat_val == I40E_VFR_VFACTIVE) ||
1532                     (rstat_val == I40E_VFR_COMPLETED))
1533                         break;
1534                 msleep(I40EVF_RESET_WAIT_MS);
1535         }
1536         if (i == I40EVF_RESET_WAIT_COUNT) {
1537                 struct i40evf_mac_filter *f, *ftmp;
1538                 struct i40evf_vlan_filter *fv, *fvtmp;
1539
1540                 /* reset never finished */
1541                 dev_err(&adapter->pdev->dev, "Reset never finished (%x)\n",
1542                         rstat_val);
1543                 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
1544
1545                 if (netif_running(adapter->netdev)) {
1546                         set_bit(__I40E_DOWN, &adapter->vsi.state);
1547                         i40evf_irq_disable(adapter);
1548                         i40evf_napi_disable_all(adapter);
1549                         netif_tx_disable(netdev);
1550                         netif_tx_stop_all_queues(netdev);
1551                         netif_carrier_off(netdev);
1552                         i40evf_free_traffic_irqs(adapter);
1553                         i40evf_free_all_tx_resources(adapter);
1554                         i40evf_free_all_rx_resources(adapter);
1555                 }
1556
1557                 /* Delete all of the filters, both MAC and VLAN. */
1558                 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list,
1559                                          list) {
1560                         list_del(&f->list);
1561                         kfree(f);
1562                 }
1563                 list_for_each_entry_safe(fv, fvtmp, &adapter->vlan_filter_list,
1564                                          list) {
1565                         list_del(&fv->list);
1566                         kfree(fv);
1567                 }
1568
1569                 i40evf_free_misc_irq(adapter);
1570                 i40evf_reset_interrupt_capability(adapter);
1571                 i40evf_free_queues(adapter);
1572                 i40evf_free_q_vectors(adapter);
1573                 kfree(adapter->vf_res);
1574                 i40evf_shutdown_adminq(hw);
1575                 adapter->netdev->flags &= ~IFF_UP;
1576                 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1577                 return; /* Do not attempt to reinit. It's dead, Jim. */
1578         }
1579
1580 continue_reset:
1581         adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1582
1583         i40evf_irq_disable(adapter);
1584
1585         if (netif_running(adapter->netdev)) {
1586                 i40evf_napi_disable_all(adapter);
1587                 netif_tx_disable(netdev);
1588                 netif_tx_stop_all_queues(netdev);
1589                 netif_carrier_off(netdev);
1590         }
1591
1592         adapter->state = __I40EVF_RESETTING;
1593
1594         /* kill and reinit the admin queue */
1595         if (i40evf_shutdown_adminq(hw))
1596                 dev_warn(&adapter->pdev->dev, "Failed to shut down adminq\n");
1597         adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1598         err = i40evf_init_adminq(hw);
1599         if (err)
1600                 dev_info(&adapter->pdev->dev, "Failed to init adminq: %d\n",
1601                          err);
1602
1603         i40evf_map_queues(adapter);
1604
1605         /* re-add all MAC filters */
1606         list_for_each_entry(f, &adapter->mac_filter_list, list) {
1607                 f->add = true;
1608         }
1609         /* re-add all VLAN filters */
1610         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
1611                 f->add = true;
1612         }
1613         adapter->aq_required = I40EVF_FLAG_AQ_ADD_MAC_FILTER;
1614         adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
1615         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1616
1617         mod_timer(&adapter->watchdog_timer, jiffies + 2);
1618
1619         if (netif_running(adapter->netdev)) {
1620                 /* allocate transmit descriptors */
1621                 err = i40evf_setup_all_tx_resources(adapter);
1622                 if (err)
1623                         goto reset_err;
1624
1625                 /* allocate receive descriptors */
1626                 err = i40evf_setup_all_rx_resources(adapter);
1627                 if (err)
1628                         goto reset_err;
1629
1630                 i40evf_configure(adapter);
1631
1632                 err = i40evf_up_complete(adapter);
1633                 if (err)
1634                         goto reset_err;
1635
1636                 i40evf_irq_enable(adapter, true);
1637         }
1638         return;
1639 reset_err:
1640         dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
1641         i40evf_close(adapter->netdev);
1642 }
1643
1644 /**
1645  * i40evf_adminq_task - worker thread to clean the admin queue
1646  * @work: pointer to work_struct containing our data
1647  **/
1648 static void i40evf_adminq_task(struct work_struct *work)
1649 {
1650         struct i40evf_adapter *adapter =
1651                 container_of(work, struct i40evf_adapter, adminq_task);
1652         struct i40e_hw *hw = &adapter->hw;
1653         struct i40e_arq_event_info event;
1654         struct i40e_virtchnl_msg *v_msg;
1655         i40e_status ret;
1656         u32 val, oldval;
1657         u16 pending;
1658
1659         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
1660                 goto out;
1661
1662         event.buf_len = I40EVF_MAX_AQ_BUF_SIZE;
1663         event.msg_buf = kzalloc(event.buf_len, GFP_KERNEL);
1664         if (!event.msg_buf)
1665                 goto out;
1666
1667         v_msg = (struct i40e_virtchnl_msg *)&event.desc;
1668         do {
1669                 ret = i40evf_clean_arq_element(hw, &event, &pending);
1670                 if (ret || !v_msg->v_opcode)
1671                         break; /* No event to process or error cleaning ARQ */
1672
1673                 i40evf_virtchnl_completion(adapter, v_msg->v_opcode,
1674                                            v_msg->v_retval, event.msg_buf,
1675                                            event.msg_len);
1676                 if (pending != 0)
1677                         memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
1678         } while (pending);
1679
1680         /* check for error indications */
1681         val = rd32(hw, hw->aq.arq.len);
1682         oldval = val;
1683         if (val & I40E_VF_ARQLEN_ARQVFE_MASK) {
1684                 dev_info(&adapter->pdev->dev, "ARQ VF Error detected\n");
1685                 val &= ~I40E_VF_ARQLEN_ARQVFE_MASK;
1686         }
1687         if (val & I40E_VF_ARQLEN_ARQOVFL_MASK) {
1688                 dev_info(&adapter->pdev->dev, "ARQ Overflow Error detected\n");
1689                 val &= ~I40E_VF_ARQLEN_ARQOVFL_MASK;
1690         }
1691         if (val & I40E_VF_ARQLEN_ARQCRIT_MASK) {
1692                 dev_info(&adapter->pdev->dev, "ARQ Critical Error detected\n");
1693                 val &= ~I40E_VF_ARQLEN_ARQCRIT_MASK;
1694         }
1695         if (oldval != val)
1696                 wr32(hw, hw->aq.arq.len, val);
1697
1698         val = rd32(hw, hw->aq.asq.len);
1699         oldval = val;
1700         if (val & I40E_VF_ATQLEN_ATQVFE_MASK) {
1701                 dev_info(&adapter->pdev->dev, "ASQ VF Error detected\n");
1702                 val &= ~I40E_VF_ATQLEN_ATQVFE_MASK;
1703         }
1704         if (val & I40E_VF_ATQLEN_ATQOVFL_MASK) {
1705                 dev_info(&adapter->pdev->dev, "ASQ Overflow Error detected\n");
1706                 val &= ~I40E_VF_ATQLEN_ATQOVFL_MASK;
1707         }
1708         if (val & I40E_VF_ATQLEN_ATQCRIT_MASK) {
1709                 dev_info(&adapter->pdev->dev, "ASQ Critical Error detected\n");
1710                 val &= ~I40E_VF_ATQLEN_ATQCRIT_MASK;
1711         }
1712         if (oldval != val)
1713                 wr32(hw, hw->aq.asq.len, val);
1714
1715         kfree(event.msg_buf);
1716 out:
1717         /* re-enable Admin queue interrupt cause */
1718         i40evf_misc_irq_enable(adapter);
1719 }
1720
1721 /**
1722  * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
1723  * @adapter: board private structure
1724  *
1725  * Free all transmit software resources
1726  **/
1727 static void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
1728 {
1729         int i;
1730
1731         for (i = 0; i < adapter->num_active_queues; i++)
1732                 if (adapter->tx_rings[i]->desc)
1733                         i40evf_free_tx_resources(adapter->tx_rings[i]);
1734 }
1735
1736 /**
1737  * i40evf_setup_all_tx_resources - allocate all queues Tx resources
1738  * @adapter: board private structure
1739  *
1740  * If this function returns with an error, then it's possible one or
1741  * more of the rings is populated (while the rest are not).  It is the
1742  * callers duty to clean those orphaned rings.
1743  *
1744  * Return 0 on success, negative on failure
1745  **/
1746 static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter)
1747 {
1748         int i, err = 0;
1749
1750         for (i = 0; i < adapter->num_active_queues; i++) {
1751                 adapter->tx_rings[i]->count = adapter->tx_desc_count;
1752                 err = i40evf_setup_tx_descriptors(adapter->tx_rings[i]);
1753                 if (!err)
1754                         continue;
1755                 dev_err(&adapter->pdev->dev,
1756                         "%s: Allocation for Tx Queue %u failed\n",
1757                         __func__, i);
1758                 break;
1759         }
1760
1761         return err;
1762 }
1763
1764 /**
1765  * i40evf_setup_all_rx_resources - allocate all queues Rx resources
1766  * @adapter: board private structure
1767  *
1768  * If this function returns with an error, then it's possible one or
1769  * more of the rings is populated (while the rest are not).  It is the
1770  * callers duty to clean those orphaned rings.
1771  *
1772  * Return 0 on success, negative on failure
1773  **/
1774 static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter)
1775 {
1776         int i, err = 0;
1777
1778         for (i = 0; i < adapter->num_active_queues; i++) {
1779                 adapter->rx_rings[i]->count = adapter->rx_desc_count;
1780                 err = i40evf_setup_rx_descriptors(adapter->rx_rings[i]);
1781                 if (!err)
1782                         continue;
1783                 dev_err(&adapter->pdev->dev,
1784                         "%s: Allocation for Rx Queue %u failed\n",
1785                         __func__, i);
1786                 break;
1787         }
1788         return err;
1789 }
1790
1791 /**
1792  * i40evf_free_all_rx_resources - Free Rx Resources for All Queues
1793  * @adapter: board private structure
1794  *
1795  * Free all receive software resources
1796  **/
1797 static void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
1798 {
1799         int i;
1800
1801         for (i = 0; i < adapter->num_active_queues; i++)
1802                 if (adapter->rx_rings[i]->desc)
1803                         i40evf_free_rx_resources(adapter->rx_rings[i]);
1804 }
1805
1806 /**
1807  * i40evf_open - Called when a network interface is made active
1808  * @netdev: network interface device structure
1809  *
1810  * Returns 0 on success, negative value on failure
1811  *
1812  * The open entry point is called when a network interface is made
1813  * active by the system (IFF_UP).  At this point all resources needed
1814  * for transmit and receive operations are allocated, the interrupt
1815  * handler is registered with the OS, the watchdog timer is started,
1816  * and the stack is notified that the interface is ready.
1817  **/
1818 static int i40evf_open(struct net_device *netdev)
1819 {
1820         struct i40evf_adapter *adapter = netdev_priv(netdev);
1821         int err;
1822
1823         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1824                 dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
1825                 return -EIO;
1826         }
1827         if (adapter->state != __I40EVF_DOWN)
1828                 return -EBUSY;
1829
1830         /* allocate transmit descriptors */
1831         err = i40evf_setup_all_tx_resources(adapter);
1832         if (err)
1833                 goto err_setup_tx;
1834
1835         /* allocate receive descriptors */
1836         err = i40evf_setup_all_rx_resources(adapter);
1837         if (err)
1838                 goto err_setup_rx;
1839
1840         /* clear any pending interrupts, may auto mask */
1841         err = i40evf_request_traffic_irqs(adapter, netdev->name);
1842         if (err)
1843                 goto err_req_irq;
1844
1845         i40evf_configure(adapter);
1846
1847         err = i40evf_up_complete(adapter);
1848         if (err)
1849                 goto err_req_irq;
1850
1851         i40evf_irq_enable(adapter, true);
1852
1853         return 0;
1854
1855 err_req_irq:
1856         i40evf_down(adapter);
1857         i40evf_free_traffic_irqs(adapter);
1858 err_setup_rx:
1859         i40evf_free_all_rx_resources(adapter);
1860 err_setup_tx:
1861         i40evf_free_all_tx_resources(adapter);
1862
1863         return err;
1864 }
1865
1866 /**
1867  * i40evf_close - Disables a network interface
1868  * @netdev: network interface device structure
1869  *
1870  * Returns 0, this is not allowed to fail
1871  *
1872  * The close entry point is called when an interface is de-activated
1873  * by the OS.  The hardware is still under the drivers control, but
1874  * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
1875  * are freed, along with all transmit and receive resources.
1876  **/
1877 static int i40evf_close(struct net_device *netdev)
1878 {
1879         struct i40evf_adapter *adapter = netdev_priv(netdev);
1880
1881         if (adapter->state <= __I40EVF_DOWN)
1882                 return 0;
1883
1884
1885         set_bit(__I40E_DOWN, &adapter->vsi.state);
1886
1887         i40evf_down(adapter);
1888         adapter->state = __I40EVF_DOWN;
1889         i40evf_free_traffic_irqs(adapter);
1890
1891         i40evf_free_all_tx_resources(adapter);
1892         i40evf_free_all_rx_resources(adapter);
1893
1894         return 0;
1895 }
1896
1897 /**
1898  * i40evf_get_stats - Get System Network Statistics
1899  * @netdev: network interface device structure
1900  *
1901  * Returns the address of the device statistics structure.
1902  * The statistics are actually updated from the timer callback.
1903  **/
1904 static struct net_device_stats *i40evf_get_stats(struct net_device *netdev)
1905 {
1906         struct i40evf_adapter *adapter = netdev_priv(netdev);
1907
1908         /* only return the current stats */
1909         return &adapter->net_stats;
1910 }
1911
1912 /**
1913  * i40evf_reinit_locked - Software reinit
1914  * @adapter: board private structure
1915  *
1916  * Reinititalizes the ring structures in response to a software configuration
1917  * change. Roughly the same as close followed by open, but skips releasing
1918  * and reallocating the interrupts.
1919  **/
1920 void i40evf_reinit_locked(struct i40evf_adapter *adapter)
1921 {
1922         struct net_device *netdev = adapter->netdev;
1923         int err;
1924
1925         WARN_ON(in_interrupt());
1926
1927         i40evf_down(adapter);
1928
1929         /* allocate transmit descriptors */
1930         err = i40evf_setup_all_tx_resources(adapter);
1931         if (err)
1932                 goto err_reinit;
1933
1934         /* allocate receive descriptors */
1935         err = i40evf_setup_all_rx_resources(adapter);
1936         if (err)
1937                 goto err_reinit;
1938
1939         i40evf_configure(adapter);
1940
1941         err = i40evf_up_complete(adapter);
1942         if (err)
1943                 goto err_reinit;
1944
1945         i40evf_irq_enable(adapter, true);
1946         return;
1947
1948 err_reinit:
1949         dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
1950         i40evf_close(netdev);
1951 }
1952
1953 /**
1954  * i40evf_change_mtu - Change the Maximum Transfer Unit
1955  * @netdev: network interface device structure
1956  * @new_mtu: new value for maximum frame size
1957  *
1958  * Returns 0 on success, negative on failure
1959  **/
1960 static int i40evf_change_mtu(struct net_device *netdev, int new_mtu)
1961 {
1962         struct i40evf_adapter *adapter = netdev_priv(netdev);
1963         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
1964
1965         if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
1966                 return -EINVAL;
1967
1968         /* must set new MTU before calling down or up */
1969         netdev->mtu = new_mtu;
1970         i40evf_reinit_locked(adapter);
1971         return 0;
1972 }
1973
1974 static const struct net_device_ops i40evf_netdev_ops = {
1975         .ndo_open               = i40evf_open,
1976         .ndo_stop               = i40evf_close,
1977         .ndo_start_xmit         = i40evf_xmit_frame,
1978         .ndo_get_stats          = i40evf_get_stats,
1979         .ndo_set_rx_mode        = i40evf_set_rx_mode,
1980         .ndo_validate_addr      = eth_validate_addr,
1981         .ndo_set_mac_address    = i40evf_set_mac,
1982         .ndo_change_mtu         = i40evf_change_mtu,
1983         .ndo_tx_timeout         = i40evf_tx_timeout,
1984         .ndo_vlan_rx_add_vid    = i40evf_vlan_rx_add_vid,
1985         .ndo_vlan_rx_kill_vid   = i40evf_vlan_rx_kill_vid,
1986 };
1987
1988 /**
1989  * i40evf_check_reset_complete - check that VF reset is complete
1990  * @hw: pointer to hw struct
1991  *
1992  * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
1993  **/
1994 static int i40evf_check_reset_complete(struct i40e_hw *hw)
1995 {
1996         u32 rstat;
1997         int i;
1998
1999         for (i = 0; i < 100; i++) {
2000                 rstat = rd32(hw, I40E_VFGEN_RSTAT) &
2001                             I40E_VFGEN_RSTAT_VFR_STATE_MASK;
2002                 if ((rstat == I40E_VFR_VFACTIVE) ||
2003                     (rstat == I40E_VFR_COMPLETED))
2004                         return 0;
2005                 usleep_range(10, 20);
2006         }
2007         return -EBUSY;
2008 }
2009
2010 /**
2011  * i40evf_init_task - worker thread to perform delayed initialization
2012  * @work: pointer to work_struct containing our data
2013  *
2014  * This task completes the work that was begun in probe. Due to the nature
2015  * of VF-PF communications, we may need to wait tens of milliseconds to get
2016  * responses back from the PF. Rather than busy-wait in probe and bog down the
2017  * whole system, we'll do it in a task so we can sleep.
2018  * This task only runs during driver init. Once we've established
2019  * communications with the PF driver and set up our netdev, the watchdog
2020  * takes over.
2021  **/
2022 static void i40evf_init_task(struct work_struct *work)
2023 {
2024         struct i40evf_adapter *adapter = container_of(work,
2025                                                       struct i40evf_adapter,
2026                                                       init_task.work);
2027         struct net_device *netdev = adapter->netdev;
2028         struct i40evf_mac_filter *f;
2029         struct i40e_hw *hw = &adapter->hw;
2030         struct pci_dev *pdev = adapter->pdev;
2031         int i, err, bufsz;
2032
2033         switch (adapter->state) {
2034         case __I40EVF_STARTUP:
2035                 /* driver loaded, probe complete */
2036                 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
2037                 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
2038                 err = i40e_set_mac_type(hw);
2039                 if (err) {
2040                         dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
2041                                 err);
2042                 goto err;
2043                 }
2044                 err = i40evf_check_reset_complete(hw);
2045                 if (err) {
2046                         dev_info(&pdev->dev, "Device is still in reset (%d), retrying\n",
2047                                  err);
2048                         goto err;
2049                 }
2050                 hw->aq.num_arq_entries = I40EVF_AQ_LEN;
2051                 hw->aq.num_asq_entries = I40EVF_AQ_LEN;
2052                 hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2053                 hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2054
2055                 err = i40evf_init_adminq(hw);
2056                 if (err) {
2057                         dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
2058                                 err);
2059                         goto err;
2060                 }
2061                 err = i40evf_send_api_ver(adapter);
2062                 if (err) {
2063                         dev_err(&pdev->dev, "Unable to send to PF (%d)\n", err);
2064                         i40evf_shutdown_adminq(hw);
2065                         goto err;
2066                 }
2067                 adapter->state = __I40EVF_INIT_VERSION_CHECK;
2068                 goto restart;
2069         case __I40EVF_INIT_VERSION_CHECK:
2070                 if (!i40evf_asq_done(hw)) {
2071                         dev_err(&pdev->dev, "Admin queue command never completed\n");
2072                         i40evf_shutdown_adminq(hw);
2073                         adapter->state = __I40EVF_STARTUP;
2074                         goto err;
2075                 }
2076
2077                 /* aq msg sent, awaiting reply */
2078                 err = i40evf_verify_api_ver(adapter);
2079                 if (err) {
2080                         if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
2081                                 err = i40evf_send_api_ver(adapter);
2082                         goto err;
2083                 }
2084                 err = i40evf_send_vf_config_msg(adapter);
2085                 if (err) {
2086                         dev_err(&pdev->dev, "Unable to send config request (%d)\n",
2087                                 err);
2088                         goto err;
2089                 }
2090                 adapter->state = __I40EVF_INIT_GET_RESOURCES;
2091                 goto restart;
2092         case __I40EVF_INIT_GET_RESOURCES:
2093                 /* aq msg sent, awaiting reply */
2094                 if (!adapter->vf_res) {
2095                         bufsz = sizeof(struct i40e_virtchnl_vf_resource) +
2096                                 (I40E_MAX_VF_VSI *
2097                                  sizeof(struct i40e_virtchnl_vsi_resource));
2098                         adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
2099                         if (!adapter->vf_res)
2100                                 goto err;
2101                 }
2102                 err = i40evf_get_vf_config(adapter);
2103                 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK) {
2104                         err = i40evf_send_vf_config_msg(adapter);
2105                         goto err;
2106                 }
2107                 if (err) {
2108                         dev_err(&pdev->dev, "Unable to get VF config (%d)\n",
2109                                 err);
2110                         goto err_alloc;
2111                 }
2112                 adapter->state = __I40EVF_INIT_SW;
2113                 break;
2114         default:
2115                 goto err_alloc;
2116         }
2117         /* got VF config message back from PF, now we can parse it */
2118         for (i = 0; i < adapter->vf_res->num_vsis; i++) {
2119                 if (adapter->vf_res->vsi_res[i].vsi_type == I40E_VSI_SRIOV)
2120                         adapter->vsi_res = &adapter->vf_res->vsi_res[i];
2121         }
2122         if (!adapter->vsi_res) {
2123                 dev_err(&pdev->dev, "No LAN VSI found\n");
2124                 goto err_alloc;
2125         }
2126
2127         adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
2128
2129         netdev->netdev_ops = &i40evf_netdev_ops;
2130         i40evf_set_ethtool_ops(netdev);
2131         netdev->watchdog_timeo = 5 * HZ;
2132         netdev->features |= NETIF_F_HIGHDMA |
2133                             NETIF_F_SG |
2134                             NETIF_F_IP_CSUM |
2135                             NETIF_F_SCTP_CSUM |
2136                             NETIF_F_IPV6_CSUM |
2137                             NETIF_F_TSO |
2138                             NETIF_F_TSO6 |
2139                             NETIF_F_RXCSUM |
2140                             NETIF_F_GRO;
2141
2142         if (adapter->vf_res->vf_offload_flags
2143             & I40E_VIRTCHNL_VF_OFFLOAD_VLAN) {
2144                 netdev->vlan_features = netdev->features;
2145                 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX |
2146                                     NETIF_F_HW_VLAN_CTAG_RX |
2147                                     NETIF_F_HW_VLAN_CTAG_FILTER;
2148         }
2149
2150         /* copy netdev features into list of user selectable features */
2151         netdev->hw_features |= netdev->features;
2152         netdev->hw_features &= ~NETIF_F_RXCSUM;
2153
2154         if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
2155                 dev_info(&pdev->dev, "Invalid MAC address %pM, using random\n",
2156                          adapter->hw.mac.addr);
2157                 random_ether_addr(adapter->hw.mac.addr);
2158         }
2159         ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
2160         ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
2161
2162         f = kzalloc(sizeof(*f), GFP_ATOMIC);
2163         if (!f)
2164                 goto err_sw_init;
2165
2166         ether_addr_copy(f->macaddr, adapter->hw.mac.addr);
2167         f->add = true;
2168         adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
2169
2170         list_add(&f->list, &adapter->mac_filter_list);
2171
2172         init_timer(&adapter->watchdog_timer);
2173         adapter->watchdog_timer.function = &i40evf_watchdog_timer;
2174         adapter->watchdog_timer.data = (unsigned long)adapter;
2175         mod_timer(&adapter->watchdog_timer, jiffies + 1);
2176
2177         adapter->num_active_queues = min_t(int,
2178                                            adapter->vsi_res->num_queue_pairs,
2179                                            (int)(num_online_cpus()));
2180         adapter->tx_desc_count = I40EVF_DEFAULT_TXD;
2181         adapter->rx_desc_count = I40EVF_DEFAULT_RXD;
2182         err = i40evf_init_interrupt_scheme(adapter);
2183         if (err)
2184                 goto err_sw_init;
2185         i40evf_map_rings_to_vectors(adapter);
2186         i40evf_configure_rss(adapter);
2187         err = i40evf_request_misc_irq(adapter);
2188         if (err)
2189                 goto err_sw_init;
2190
2191         netif_carrier_off(netdev);
2192
2193         adapter->vsi.id = adapter->vsi_res->vsi_id;
2194         adapter->vsi.seid = adapter->vsi_res->vsi_id; /* dummy */
2195         adapter->vsi.back = adapter;
2196         adapter->vsi.base_vector = 1;
2197         adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
2198         adapter->vsi.rx_itr_setting = (I40E_ITR_DYNAMIC |
2199                                        ITR_REG_TO_USEC(I40E_ITR_RX_DEF));
2200         adapter->vsi.tx_itr_setting = (I40E_ITR_DYNAMIC |
2201                                        ITR_REG_TO_USEC(I40E_ITR_TX_DEF));
2202         adapter->vsi.netdev = adapter->netdev;
2203
2204         if (!adapter->netdev_registered) {
2205                 err = register_netdev(netdev);
2206                 if (err)
2207                         goto err_register;
2208         }
2209
2210         adapter->netdev_registered = true;
2211
2212         netif_tx_stop_all_queues(netdev);
2213
2214         dev_info(&pdev->dev, "MAC address: %pM\n", adapter->hw.mac.addr);
2215         if (netdev->features & NETIF_F_GRO)
2216                 dev_info(&pdev->dev, "GRO is enabled\n");
2217
2218         dev_info(&pdev->dev, "%s\n", i40evf_driver_string);
2219         adapter->state = __I40EVF_DOWN;
2220         set_bit(__I40E_DOWN, &adapter->vsi.state);
2221         i40evf_misc_irq_enable(adapter);
2222         return;
2223 restart:
2224         schedule_delayed_work(&adapter->init_task,
2225                               msecs_to_jiffies(50));
2226         return;
2227
2228 err_register:
2229         i40evf_free_misc_irq(adapter);
2230 err_sw_init:
2231         i40evf_reset_interrupt_capability(adapter);
2232 err_alloc:
2233         kfree(adapter->vf_res);
2234         adapter->vf_res = NULL;
2235 err:
2236         /* Things went into the weeds, so try again later */
2237         if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
2238                 dev_err(&pdev->dev, "Failed to communicate with PF; giving up\n");
2239                 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
2240                 return; /* do not reschedule */
2241         }
2242         schedule_delayed_work(&adapter->init_task, HZ * 3);
2243 }
2244
2245 /**
2246  * i40evf_shutdown - Shutdown the device in preparation for a reboot
2247  * @pdev: pci device structure
2248  **/
2249 static void i40evf_shutdown(struct pci_dev *pdev)
2250 {
2251         struct net_device *netdev = pci_get_drvdata(pdev);
2252         struct i40evf_adapter *adapter = netdev_priv(netdev);
2253
2254         netif_device_detach(netdev);
2255
2256         if (netif_running(netdev))
2257                 i40evf_close(netdev);
2258
2259         /* Prevent the watchdog from running. */
2260         adapter->state = __I40EVF_REMOVE;
2261         adapter->aq_required = 0;
2262         adapter->aq_pending = 0;
2263
2264 #ifdef CONFIG_PM
2265         pci_save_state(pdev);
2266
2267 #endif
2268         pci_disable_device(pdev);
2269 }
2270
2271 /**
2272  * i40evf_probe - Device Initialization Routine
2273  * @pdev: PCI device information struct
2274  * @ent: entry in i40evf_pci_tbl
2275  *
2276  * Returns 0 on success, negative on failure
2277  *
2278  * i40evf_probe initializes an adapter identified by a pci_dev structure.
2279  * The OS initialization, configuring of the adapter private structure,
2280  * and a hardware reset occur.
2281  **/
2282 static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2283 {
2284         struct net_device *netdev;
2285         struct i40evf_adapter *adapter = NULL;
2286         struct i40e_hw *hw = NULL;
2287         int err;
2288
2289         err = pci_enable_device(pdev);
2290         if (err)
2291                 return err;
2292
2293         err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
2294         if (err) {
2295                 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2296                 if (err) {
2297                         dev_err(&pdev->dev,
2298                                 "DMA configuration failed: 0x%x\n", err);
2299                         goto err_dma;
2300                 }
2301         }
2302
2303         err = pci_request_regions(pdev, i40evf_driver_name);
2304         if (err) {
2305                 dev_err(&pdev->dev,
2306                         "pci_request_regions failed 0x%x\n", err);
2307                 goto err_pci_reg;
2308         }
2309
2310         pci_enable_pcie_error_reporting(pdev);
2311
2312         pci_set_master(pdev);
2313
2314         netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter),
2315                                    MAX_TX_QUEUES);
2316         if (!netdev) {
2317                 err = -ENOMEM;
2318                 goto err_alloc_etherdev;
2319         }
2320
2321         SET_NETDEV_DEV(netdev, &pdev->dev);
2322
2323         pci_set_drvdata(pdev, netdev);
2324         adapter = netdev_priv(netdev);
2325
2326         adapter->netdev = netdev;
2327         adapter->pdev = pdev;
2328
2329         hw = &adapter->hw;
2330         hw->back = adapter;
2331
2332         adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
2333         adapter->state = __I40EVF_STARTUP;
2334
2335         /* Call save state here because it relies on the adapter struct. */
2336         pci_save_state(pdev);
2337
2338         hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
2339                               pci_resource_len(pdev, 0));
2340         if (!hw->hw_addr) {
2341                 err = -EIO;
2342                 goto err_ioremap;
2343         }
2344         hw->vendor_id = pdev->vendor;
2345         hw->device_id = pdev->device;
2346         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2347         hw->subsystem_vendor_id = pdev->subsystem_vendor;
2348         hw->subsystem_device_id = pdev->subsystem_device;
2349         hw->bus.device = PCI_SLOT(pdev->devfn);
2350         hw->bus.func = PCI_FUNC(pdev->devfn);
2351
2352         INIT_LIST_HEAD(&adapter->mac_filter_list);
2353         INIT_LIST_HEAD(&adapter->vlan_filter_list);
2354
2355         INIT_WORK(&adapter->reset_task, i40evf_reset_task);
2356         INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
2357         INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
2358         INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
2359         schedule_delayed_work(&adapter->init_task, 10);
2360
2361         return 0;
2362
2363 err_ioremap:
2364         free_netdev(netdev);
2365 err_alloc_etherdev:
2366         pci_release_regions(pdev);
2367 err_pci_reg:
2368 err_dma:
2369         pci_disable_device(pdev);
2370         return err;
2371 }
2372
2373 #ifdef CONFIG_PM
2374 /**
2375  * i40evf_suspend - Power management suspend routine
2376  * @pdev: PCI device information struct
2377  * @state: unused
2378  *
2379  * Called when the system (VM) is entering sleep/suspend.
2380  **/
2381 static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
2382 {
2383         struct net_device *netdev = pci_get_drvdata(pdev);
2384         struct i40evf_adapter *adapter = netdev_priv(netdev);
2385         int retval = 0;
2386
2387         netif_device_detach(netdev);
2388
2389         if (netif_running(netdev)) {
2390                 rtnl_lock();
2391                 i40evf_down(adapter);
2392                 rtnl_unlock();
2393         }
2394         i40evf_free_misc_irq(adapter);
2395         i40evf_reset_interrupt_capability(adapter);
2396
2397         retval = pci_save_state(pdev);
2398         if (retval)
2399                 return retval;
2400
2401         pci_disable_device(pdev);
2402
2403         return 0;
2404 }
2405
2406 /**
2407  * i40evf_resume - Power management resume routine
2408  * @pdev: PCI device information struct
2409  *
2410  * Called when the system (VM) is resumed from sleep/suspend.
2411  **/
2412 static int i40evf_resume(struct pci_dev *pdev)
2413 {
2414         struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
2415         struct net_device *netdev = adapter->netdev;
2416         u32 err;
2417
2418         pci_set_power_state(pdev, PCI_D0);
2419         pci_restore_state(pdev);
2420         /* pci_restore_state clears dev->state_saved so call
2421          * pci_save_state to restore it.
2422          */
2423         pci_save_state(pdev);
2424
2425         err = pci_enable_device_mem(pdev);
2426         if (err) {
2427                 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
2428                 return err;
2429         }
2430         pci_set_master(pdev);
2431
2432         rtnl_lock();
2433         err = i40evf_set_interrupt_capability(adapter);
2434         if (err) {
2435                 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
2436                 return err;
2437         }
2438         err = i40evf_request_misc_irq(adapter);
2439         rtnl_unlock();
2440         if (err) {
2441                 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
2442                 return err;
2443         }
2444
2445         schedule_work(&adapter->reset_task);
2446
2447         netif_device_attach(netdev);
2448
2449         return err;
2450 }
2451
2452 #endif /* CONFIG_PM */
2453 /**
2454  * i40evf_remove - Device Removal Routine
2455  * @pdev: PCI device information struct
2456  *
2457  * i40evf_remove is called by the PCI subsystem to alert the driver
2458  * that it should release a PCI device.  The could be caused by a
2459  * Hot-Plug event, or because the driver is going to be removed from
2460  * memory.
2461  **/
2462 static void i40evf_remove(struct pci_dev *pdev)
2463 {
2464         struct net_device *netdev = pci_get_drvdata(pdev);
2465         struct i40evf_adapter *adapter = netdev_priv(netdev);
2466         struct i40evf_mac_filter *f, *ftmp;
2467         struct i40e_hw *hw = &adapter->hw;
2468
2469         cancel_delayed_work_sync(&adapter->init_task);
2470         cancel_work_sync(&adapter->reset_task);
2471
2472         if (adapter->netdev_registered) {
2473                 unregister_netdev(netdev);
2474                 adapter->netdev_registered = false;
2475         }
2476
2477         /* Shut down all the garbage mashers on the detention level */
2478         adapter->state = __I40EVF_REMOVE;
2479         adapter->aq_required = 0;
2480         adapter->aq_pending = 0;
2481         i40evf_request_reset(adapter);
2482         msleep(20);
2483         /* If the FW isn't responding, kick it once, but only once. */
2484         if (!i40evf_asq_done(hw)) {
2485                 i40evf_request_reset(adapter);
2486                 msleep(20);
2487         }
2488
2489         if (adapter->msix_entries) {
2490                 i40evf_misc_irq_disable(adapter);
2491                 i40evf_free_misc_irq(adapter);
2492                 i40evf_reset_interrupt_capability(adapter);
2493                 i40evf_free_q_vectors(adapter);
2494         }
2495
2496         if (adapter->watchdog_timer.function)
2497                 del_timer_sync(&adapter->watchdog_timer);
2498
2499         flush_scheduled_work();
2500
2501         if (hw->aq.asq.count)
2502                 i40evf_shutdown_adminq(hw);
2503
2504         iounmap(hw->hw_addr);
2505         pci_release_regions(pdev);
2506
2507         i40evf_free_queues(adapter);
2508         kfree(adapter->vf_res);
2509         /* If we got removed before an up/down sequence, we've got a filter
2510          * hanging out there that we need to get rid of.
2511          */
2512         list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
2513                 list_del(&f->list);
2514                 kfree(f);
2515         }
2516         list_for_each_entry_safe(f, ftmp, &adapter->vlan_filter_list, list) {
2517                 list_del(&f->list);
2518                 kfree(f);
2519         }
2520
2521         free_netdev(netdev);
2522
2523         pci_disable_pcie_error_reporting(pdev);
2524
2525         pci_disable_device(pdev);
2526 }
2527
2528 static struct pci_driver i40evf_driver = {
2529         .name     = i40evf_driver_name,
2530         .id_table = i40evf_pci_tbl,
2531         .probe    = i40evf_probe,
2532         .remove   = i40evf_remove,
2533 #ifdef CONFIG_PM
2534         .suspend  = i40evf_suspend,
2535         .resume   = i40evf_resume,
2536 #endif
2537         .shutdown = i40evf_shutdown,
2538 };
2539
2540 /**
2541  * i40e_init_module - Driver Registration Routine
2542  *
2543  * i40e_init_module is the first routine called when the driver is
2544  * loaded. All it does is register with the PCI subsystem.
2545  **/
2546 static int __init i40evf_init_module(void)
2547 {
2548         int ret;
2549
2550         pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
2551                 i40evf_driver_version);
2552
2553         pr_info("%s\n", i40evf_copyright);
2554
2555         ret = pci_register_driver(&i40evf_driver);
2556         return ret;
2557 }
2558
2559 module_init(i40evf_init_module);
2560
2561 /**
2562  * i40e_exit_module - Driver Exit Cleanup Routine
2563  *
2564  * i40e_exit_module is called just before the driver is removed
2565  * from memory.
2566  **/
2567 static void __exit i40evf_exit_module(void)
2568 {
2569         pci_unregister_driver(&i40evf_driver);
2570 }
2571
2572 module_exit(i40evf_exit_module);
2573
2574 /* i40evf_main.c */