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

   1 /*******************************************************************************
   2  *
   3  * Intel Ethernet Controller XL710 Family Linux Virtual Function Driver
   4  * Copyright(c) 2013 - 2014 Intel Corporation.
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms and conditions of the GNU General Public License,
   8  * version 2, as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  * The full GNU General Public License is included in this distribution in
  19  * the file called "COPYING".
  20  *
  21  * Contact Information:
  22  * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  23  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  24  *
  25  ******************************************************************************/
  26
  27 #include "i40evf.h"
  28 #include "i40e_prototype.h"
  29 static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter);
  30 static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter);
  31 static void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter);
  32 static void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter);
  33 static int i40evf_close(struct net_device *netdev);
  34
  35 char i40evf_driver_name[] = "i40evf";
  36 static const char i40evf_driver_string[] =
  37         "Intel(R) XL710/X710 Virtual Function Network Driver";
  38
  39 #define DRV_VERSION "1.2.2"
  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_CTLN_CLEARPBA_MASK);
 248                 }
 249         }
 250 }
 251
 252 /**
 253  * i40evf_fire_sw_int - Generate SW interrupt for specified vectors
 254  * @adapter: board private structure
 255  * @mask: bitmap of vectors to trigger
 256  **/
 257 static void i40evf_fire_sw_int(struct i40evf_adapter *adapter, u32 mask)
 258 {
 259         struct i40e_hw *hw = &adapter->hw;
 260         int i;
 261         uint32_t dyn_ctl;
 262
 263         if (mask & 1) {
 264                 dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTL01);
 265                 dyn_ctl |= I40E_VFINT_DYN_CTLN_SWINT_TRIG_MASK |
 266                            I40E_VFINT_DYN_CTLN_CLEARPBA_MASK;
 267                 wr32(hw, I40E_VFINT_DYN_CTL01, dyn_ctl);
 268         }
 269         for (i = 1; i < adapter->num_msix_vectors; i++) {
 270                 if (mask & (1 << i)) {
 271                         dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTLN1(i - 1));
 272                         dyn_ctl |= I40E_VFINT_DYN_CTLN_SWINT_TRIG_MASK |
 273                                    I40E_VFINT_DYN_CTLN_CLEARPBA_MASK;
 274                         wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), dyn_ctl);
 275                 }
 276         }
 277 }
 278
 279 /**
 280  * i40evf_irq_enable - Enable default interrupt generation settings
 281  * @adapter: board private structure
 282  **/
 283 void i40evf_irq_enable(struct i40evf_adapter *adapter, bool flush)
 284 {
 285         struct i40e_hw *hw = &adapter->hw;
 286
 287         i40evf_misc_irq_enable(adapter);
 288         i40evf_irq_enable_queues(adapter, ~0);
 289
 290         if (flush)
 291                 rd32(hw, I40E_VFGEN_RSTAT);
 292 }
 293
 294 /**
 295  * i40evf_msix_aq - Interrupt handler for vector 0
 296  * @irq: interrupt number
 297  * @data: pointer to netdev
 298  **/
 299 static irqreturn_t i40evf_msix_aq(int irq, void *data)
 300 {
 301         struct net_device *netdev = data;
 302         struct i40evf_adapter *adapter = netdev_priv(netdev);
 303         struct i40e_hw *hw = &adapter->hw;
 304         u32 val;
 305         u32 ena_mask;
 306
 307         /* handle non-queue interrupts */
 308         val = rd32(hw, I40E_VFINT_ICR01);
 309         ena_mask = rd32(hw, I40E_VFINT_ICR0_ENA1);
 310
 311
 312         val = rd32(hw, I40E_VFINT_DYN_CTL01);
 313         val = val | I40E_PFINT_DYN_CTL0_CLEARPBA_MASK;
 314         wr32(hw, I40E_VFINT_DYN_CTL01, val);
 315
 316         /* schedule work on the private workqueue */
 317         schedule_work(&adapter->adminq_task);
 318
 319         return IRQ_HANDLED;
 320 }
 321
 322 /**
 323  * i40evf_msix_clean_rings - MSIX mode Interrupt Handler
 324  * @irq: interrupt number
 325  * @data: pointer to a q_vector
 326  **/
 327 static irqreturn_t i40evf_msix_clean_rings(int irq, void *data)
 328 {
 329         struct i40e_q_vector *q_vector = data;
 330
 331         if (!q_vector->tx.ring && !q_vector->rx.ring)
 332                 return IRQ_HANDLED;
 333
 334         napi_schedule(&q_vector->napi);
 335
 336         return IRQ_HANDLED;
 337 }
 338
 339 /**
 340  * i40evf_map_vector_to_rxq - associate irqs with rx queues
 341  * @adapter: board private structure
 342  * @v_idx: interrupt number
 343  * @r_idx: queue number
 344  **/
 345 static void
 346 i40evf_map_vector_to_rxq(struct i40evf_adapter *adapter, int v_idx, int r_idx)
 347 {
 348         struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
 349         struct i40e_ring *rx_ring = adapter->rx_rings[r_idx];
 350
 351         rx_ring->q_vector = q_vector;
 352         rx_ring->next = q_vector->rx.ring;
 353         rx_ring->vsi = &adapter->vsi;
 354         q_vector->rx.ring = rx_ring;
 355         q_vector->rx.count++;
 356         q_vector->rx.latency_range = I40E_LOW_LATENCY;
 357 }
 358
 359 /**
 360  * i40evf_map_vector_to_txq - associate irqs with tx queues
 361  * @adapter: board private structure
 362  * @v_idx: interrupt number
 363  * @t_idx: queue number
 364  **/
 365 static void
 366 i40evf_map_vector_to_txq(struct i40evf_adapter *adapter, int v_idx, int t_idx)
 367 {
 368         struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
 369         struct i40e_ring *tx_ring = adapter->tx_rings[t_idx];
 370
 371         tx_ring->q_vector = q_vector;
 372         tx_ring->next = q_vector->tx.ring;
 373         tx_ring->vsi = &adapter->vsi;
 374         q_vector->tx.ring = tx_ring;
 375         q_vector->tx.count++;
 376         q_vector->tx.latency_range = I40E_LOW_LATENCY;
 377         q_vector->num_ringpairs++;
 378         q_vector->ring_mask |= (1 << t_idx);
 379 }
 380
 381 /**
 382  * i40evf_map_rings_to_vectors - Maps descriptor rings to vectors
 383  * @adapter: board private structure to initialize
 384  *
 385  * This function maps descriptor rings to the queue-specific vectors
 386  * we were allotted through the MSI-X enabling code.  Ideally, we'd have
 387  * one vector per ring/queue, but on a constrained vector budget, we
 388  * group the rings as "efficiently" as possible.  You would add new
 389  * mapping configurations in here.
 390  **/
 391 static int i40evf_map_rings_to_vectors(struct i40evf_adapter *adapter)
 392 {
 393         int q_vectors;
 394         int v_start = 0;
 395         int rxr_idx = 0, txr_idx = 0;
 396         int rxr_remaining = adapter->num_active_queues;
 397         int txr_remaining = adapter->num_active_queues;
 398         int i, j;
 399         int rqpv, tqpv;
 400         int err = 0;
 401
 402         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 403
 404         /* The ideal configuration...
 405          * We have enough vectors to map one per queue.
 406          */
 407         if (q_vectors == (rxr_remaining * 2)) {
 408                 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
 409                         i40evf_map_vector_to_rxq(adapter, v_start, rxr_idx);
 410
 411                 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
 412                         i40evf_map_vector_to_txq(adapter, v_start, txr_idx);
 413                 goto out;
 414         }
 415
 416         /* If we don't have enough vectors for a 1-to-1
 417          * mapping, we'll have to group them so there are
 418          * multiple queues per vector.
 419          * Re-adjusting *qpv takes care of the remainder.
 420          */
 421         for (i = v_start; i < q_vectors; i++) {
 422                 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
 423                 for (j = 0; j < rqpv; j++) {
 424                         i40evf_map_vector_to_rxq(adapter, i, rxr_idx);
 425                         rxr_idx++;
 426                         rxr_remaining--;
 427                 }
 428         }
 429         for (i = v_start; i < q_vectors; i++) {
 430                 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
 431                 for (j = 0; j < tqpv; j++) {
 432                         i40evf_map_vector_to_txq(adapter, i, txr_idx);
 433                         txr_idx++;
 434                         txr_remaining--;
 435                 }
 436         }
 437
 438 out:
 439         adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
 440
 441         return err;
 442 }
 443
 444 /**
 445  * i40evf_request_traffic_irqs - Initialize MSI-X interrupts
 446  * @adapter: board private structure
 447  *
 448  * Allocates MSI-X vectors for tx and rx handling, and requests
 449  * interrupts from the kernel.
 450  **/
 451 static int
 452 i40evf_request_traffic_irqs(struct i40evf_adapter *adapter, char *basename)
 453 {
 454         int vector, err, q_vectors;
 455         int rx_int_idx = 0, tx_int_idx = 0;
 456
 457         i40evf_irq_disable(adapter);
 458         /* Decrement for Other and TCP Timer vectors */
 459         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 460
 461         for (vector = 0; vector < q_vectors; vector++) {
 462                 struct i40e_q_vector *q_vector = adapter->q_vector[vector];
 463
 464                 if (q_vector->tx.ring && q_vector->rx.ring) {
 465                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 466                                  "i40evf-%s-%s-%d", basename,
 467                                  "TxRx", rx_int_idx++);
 468                         tx_int_idx++;
 469                 } else if (q_vector->rx.ring) {
 470                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 471                                  "i40evf-%s-%s-%d", basename,
 472                                  "rx", rx_int_idx++);
 473                 } else if (q_vector->tx.ring) {
 474                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 475                                  "i40evf-%s-%s-%d", basename,
 476                                  "tx", tx_int_idx++);
 477                 } else {
 478                         /* skip this unused q_vector */
 479                         continue;
 480                 }
 481                 err = request_irq(
 482                         adapter->msix_entries[vector + NONQ_VECS].vector,
 483                         i40evf_msix_clean_rings,
 484                         0,
 485                         q_vector->name,
 486                         q_vector);
 487                 if (err) {
 488                         dev_info(&adapter->pdev->dev,
 489                                  "%s: request_irq failed, error: %d\n",
 490                                 __func__, err);
 491                         goto free_queue_irqs;
 492                 }
 493                 /* assign the mask for this irq */
 494                 irq_set_affinity_hint(
 495                         adapter->msix_entries[vector + NONQ_VECS].vector,
 496                         q_vector->affinity_mask);
 497         }
 498
 499         return 0;
 500
 501 free_queue_irqs:
 502         while (vector) {
 503                 vector--;
 504                 irq_set_affinity_hint(
 505                         adapter->msix_entries[vector + NONQ_VECS].vector,
 506                         NULL);
 507                 free_irq(adapter->msix_entries[vector + NONQ_VECS].vector,
 508                          adapter->q_vector[vector]);
 509         }
 510         return err;
 511 }
 512
 513 /**
 514  * i40evf_request_misc_irq - Initialize MSI-X interrupts
 515  * @adapter: board private structure
 516  *
 517  * Allocates MSI-X vector 0 and requests interrupts from the kernel. This
 518  * vector is only for the admin queue, and stays active even when the netdev
 519  * is closed.
 520  **/
 521 static int i40evf_request_misc_irq(struct i40evf_adapter *adapter)
 522 {
 523         struct net_device *netdev = adapter->netdev;
 524         int err;
 525
 526         snprintf(adapter->misc_vector_name,
 527                  sizeof(adapter->misc_vector_name) - 1, "i40evf:mbx");
 528         err = request_irq(adapter->msix_entries[0].vector,
 529                           &i40evf_msix_aq, 0,
 530                           adapter->misc_vector_name, netdev);
 531         if (err) {
 532                 dev_err(&adapter->pdev->dev,
 533                         "request_irq for %s failed: %d\n",
 534                         adapter->misc_vector_name, err);
 535                 free_irq(adapter->msix_entries[0].vector, netdev);
 536         }
 537         return err;
 538 }
 539
 540 /**
 541  * i40evf_free_traffic_irqs - Free MSI-X interrupts
 542  * @adapter: board private structure
 543  *
 544  * Frees all MSI-X vectors other than 0.
 545  **/
 546 static void i40evf_free_traffic_irqs(struct i40evf_adapter *adapter)
 547 {
 548         int i;
 549         int q_vectors;
 550
 551         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 552
 553         for (i = 0; i < q_vectors; i++) {
 554                 irq_set_affinity_hint(adapter->msix_entries[i+1].vector,
 555                                       NULL);
 556                 free_irq(adapter->msix_entries[i+1].vector,
 557                          adapter->q_vector[i]);
 558         }
 559 }
 560
 561 /**
 562  * i40evf_free_misc_irq - Free MSI-X miscellaneous vector
 563  * @adapter: board private structure
 564  *
 565  * Frees MSI-X vector 0.
 566  **/
 567 static void i40evf_free_misc_irq(struct i40evf_adapter *adapter)
 568 {
 569         struct net_device *netdev = adapter->netdev;
 570
 571         free_irq(adapter->msix_entries[0].vector, netdev);
 572 }
 573
 574 /**
 575  * i40evf_configure_tx - Configure Transmit Unit after Reset
 576  * @adapter: board private structure
 577  *
 578  * Configure the Tx unit of the MAC after a reset.
 579  **/
 580 static void i40evf_configure_tx(struct i40evf_adapter *adapter)
 581 {
 582         struct i40e_hw *hw = &adapter->hw;
 583         int i;
 584
 585         for (i = 0; i < adapter->num_active_queues; i++)
 586                 adapter->tx_rings[i]->tail = hw->hw_addr + I40E_QTX_TAIL1(i);
 587 }
 588
 589 /**
 590  * i40evf_configure_rx - Configure Receive Unit after Reset
 591  * @adapter: board private structure
 592  *
 593  * Configure the Rx unit of the MAC after a reset.
 594  **/
 595 static void i40evf_configure_rx(struct i40evf_adapter *adapter)
 596 {
 597         struct i40e_hw *hw = &adapter->hw;
 598         struct net_device *netdev = adapter->netdev;
 599         int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
 600         int i;
 601         int rx_buf_len;
 602
 603
 604         adapter->flags &= ~I40EVF_FLAG_RX_PS_CAPABLE;
 605         adapter->flags |= I40EVF_FLAG_RX_1BUF_CAPABLE;
 606
 607         /* Decide whether to use packet split mode or not */
 608         if (netdev->mtu > ETH_DATA_LEN) {
 609                 if (adapter->flags & I40EVF_FLAG_RX_PS_CAPABLE)
 610                         adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
 611                 else
 612                         adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
 613         } else {
 614                 if (adapter->flags & I40EVF_FLAG_RX_1BUF_CAPABLE)
 615                         adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
 616                 else
 617                         adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
 618         }
 619
 620         /* Set the RX buffer length according to the mode */
 621         if (adapter->flags & I40EVF_FLAG_RX_PS_ENABLED) {
 622                 rx_buf_len = I40E_RX_HDR_SIZE;
 623         } else {
 624                 if (netdev->mtu <= ETH_DATA_LEN)
 625                         rx_buf_len = I40EVF_RXBUFFER_2048;
 626                 else
 627                         rx_buf_len = ALIGN(max_frame, 1024);
 628         }
 629
 630         for (i = 0; i < adapter->num_active_queues; i++) {
 631                 adapter->rx_rings[i]->tail = hw->hw_addr + I40E_QRX_TAIL1(i);
 632                 adapter->rx_rings[i]->rx_buf_len = rx_buf_len;
 633         }
 634 }
 635
 636 /**
 637  * i40evf_find_vlan - Search filter list for specific vlan filter
 638  * @adapter: board private structure
 639  * @vlan: vlan tag
 640  *
 641  * Returns ptr to the filter object or NULL
 642  **/
 643 static struct
 644 i40evf_vlan_filter *i40evf_find_vlan(struct i40evf_adapter *adapter, u16 vlan)
 645 {
 646         struct i40evf_vlan_filter *f;
 647
 648         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
 649                 if (vlan == f->vlan)
 650                         return f;
 651         }
 652         return NULL;
 653 }
 654
 655 /**
 656  * i40evf_add_vlan - Add a vlan filter to the list
 657  * @adapter: board private structure
 658  * @vlan: VLAN tag
 659  *
 660  * Returns ptr to the filter object or NULL when no memory available.
 661  **/
 662 static struct
 663 i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan)
 664 {
 665         struct i40evf_vlan_filter *f;
 666
 667         f = i40evf_find_vlan(adapter, vlan);
 668         if (!f) {
 669                 f = kzalloc(sizeof(*f), GFP_ATOMIC);
 670                 if (!f)
 671                         return NULL;
 672
 673                 f->vlan = vlan;
 674
 675                 INIT_LIST_HEAD(&f->list);
 676                 list_add(&f->list, &adapter->vlan_filter_list);
 677                 f->add = true;
 678                 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
 679         }
 680
 681         return f;
 682 }
 683
 684 /**
 685  * i40evf_del_vlan - Remove a vlan filter from the list
 686  * @adapter: board private structure
 687  * @vlan: VLAN tag
 688  **/
 689 static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan)
 690 {
 691         struct i40evf_vlan_filter *f;
 692
 693         f = i40evf_find_vlan(adapter, vlan);
 694         if (f) {
 695                 f->remove = true;
 696                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
 697         }
 698 }
 699
 700 /**
 701  * i40evf_vlan_rx_add_vid - Add a VLAN filter to a device
 702  * @netdev: network device struct
 703  * @vid: VLAN tag
 704  **/
 705 static int i40evf_vlan_rx_add_vid(struct net_device *netdev,
 706                                   __always_unused __be16 proto, u16 vid)
 707 {
 708         struct i40evf_adapter *adapter = netdev_priv(netdev);
 709
 710         if (i40evf_add_vlan(adapter, vid) == NULL)
 711                 return -ENOMEM;
 712         return 0;
 713 }
 714
 715 /**
 716  * i40evf_vlan_rx_kill_vid - Remove a VLAN filter from a device
 717  * @netdev: network device struct
 718  * @vid: VLAN tag
 719  **/
 720 static int i40evf_vlan_rx_kill_vid(struct net_device *netdev,
 721                                    __always_unused __be16 proto, u16 vid)
 722 {
 723         struct i40evf_adapter *adapter = netdev_priv(netdev);
 724
 725         i40evf_del_vlan(adapter, vid);
 726         return 0;
 727 }
 728
 729 /**
 730  * i40evf_find_filter - Search filter list for specific mac filter
 731  * @adapter: board private structure
 732  * @macaddr: the MAC address
 733  *
 734  * Returns ptr to the filter object or NULL
 735  **/
 736 static struct
 737 i40evf_mac_filter *i40evf_find_filter(struct i40evf_adapter *adapter,
 738                                       u8 *macaddr)
 739 {
 740         struct i40evf_mac_filter *f;
 741
 742         if (!macaddr)
 743                 return NULL;
 744
 745         list_for_each_entry(f, &adapter->mac_filter_list, list) {
 746                 if (ether_addr_equal(macaddr, f->macaddr))
 747                         return f;
 748         }
 749         return NULL;
 750 }
 751
 752 /**
 753  * i40e_add_filter - Add a mac filter to the filter list
 754  * @adapter: board private structure
 755  * @macaddr: the MAC address
 756  *
 757  * Returns ptr to the filter object or NULL when no memory available.
 758  **/
 759 static struct
 760 i40evf_mac_filter *i40evf_add_filter(struct i40evf_adapter *adapter,
 761                                      u8 *macaddr)
 762 {
 763         struct i40evf_mac_filter *f;
 764
 765         if (!macaddr)
 766                 return NULL;
 767
 768         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 769                                 &adapter->crit_section))
 770                 udelay(1);
 771
 772         f = i40evf_find_filter(adapter, macaddr);
 773         if (!f) {
 774                 f = kzalloc(sizeof(*f), GFP_ATOMIC);
 775                 if (!f) {
 776                         clear_bit(__I40EVF_IN_CRITICAL_TASK,
 777                                   &adapter->crit_section);
 778                         return NULL;
 779                 }
 780
 781                 ether_addr_copy(f->macaddr, macaddr);
 782
 783                 list_add(&f->list, &adapter->mac_filter_list);
 784                 f->add = true;
 785                 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
 786         }
 787
 788         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 789         return f;
 790 }
 791
 792 /**
 793  * i40evf_set_mac - NDO callback to set port mac address
 794  * @netdev: network interface device structure
 795  * @p: pointer to an address structure
 796  *
 797  * Returns 0 on success, negative on failure
 798  **/
 799 static int i40evf_set_mac(struct net_device *netdev, void *p)
 800 {
 801         struct i40evf_adapter *adapter = netdev_priv(netdev);
 802         struct i40e_hw *hw = &adapter->hw;
 803         struct i40evf_mac_filter *f;
 804         struct sockaddr *addr = p;
 805
 806         if (!is_valid_ether_addr(addr->sa_data))
 807                 return -EADDRNOTAVAIL;
 808
 809         if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
 810                 return 0;
 811
 812         f = i40evf_add_filter(adapter, addr->sa_data);
 813         if (f) {
 814                 ether_addr_copy(hw->mac.addr, addr->sa_data);
 815                 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
 816         }
 817
 818         return (f == NULL) ? -ENOMEM : 0;
 819 }
 820
 821 /**
 822  * i40evf_set_rx_mode - NDO callback to set the netdev filters
 823  * @netdev: network interface device structure
 824  **/
 825 static void i40evf_set_rx_mode(struct net_device *netdev)
 826 {
 827         struct i40evf_adapter *adapter = netdev_priv(netdev);
 828         struct i40evf_mac_filter *f, *ftmp;
 829         struct netdev_hw_addr *uca;
 830         struct netdev_hw_addr *mca;
 831
 832         /* add addr if not already in the filter list */
 833         netdev_for_each_uc_addr(uca, netdev) {
 834                 i40evf_add_filter(adapter, uca->addr);
 835         }
 836         netdev_for_each_mc_addr(mca, netdev) {
 837                 i40evf_add_filter(adapter, mca->addr);
 838         }
 839
 840         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 841                                 &adapter->crit_section))
 842                 udelay(1);
 843         /* remove filter if not in netdev list */
 844         list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
 845                 bool found = false;
 846
 847                 if (is_multicast_ether_addr(f->macaddr)) {
 848                         netdev_for_each_mc_addr(mca, netdev) {
 849                                 if (ether_addr_equal(mca->addr, f->macaddr)) {
 850                                         found = true;
 851                                         break;
 852                                 }
 853                         }
 854                 } else {
 855                         netdev_for_each_uc_addr(uca, netdev) {
 856                                 if (ether_addr_equal(uca->addr, f->macaddr)) {
 857                                         found = true;
 858                                         break;
 859                                 }
 860                         }
 861                 }
 862                 if (found) {
 863                         f->remove = true;
 864                         adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
 865                 }
 866         }
 867         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 868 }
 869
 870 /**
 871  * i40evf_napi_enable_all - enable NAPI on all queue vectors
 872  * @adapter: board private structure
 873  **/
 874 static void i40evf_napi_enable_all(struct i40evf_adapter *adapter)
 875 {
 876         int q_idx;
 877         struct i40e_q_vector *q_vector;
 878         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 879
 880         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
 881                 struct napi_struct *napi;
 882
 883                 q_vector = adapter->q_vector[q_idx];
 884                 napi = &q_vector->napi;
 885                 napi_enable(napi);
 886         }
 887 }
 888
 889 /**
 890  * i40evf_napi_disable_all - disable NAPI on all queue vectors
 891  * @adapter: board private structure
 892  **/
 893 static void i40evf_napi_disable_all(struct i40evf_adapter *adapter)
 894 {
 895         int q_idx;
 896         struct i40e_q_vector *q_vector;
 897         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 898
 899         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
 900                 q_vector = adapter->q_vector[q_idx];
 901                 napi_disable(&q_vector->napi);
 902         }
 903 }
 904
 905 /**
 906  * i40evf_configure - set up transmit and receive data structures
 907  * @adapter: board private structure
 908  **/
 909 static void i40evf_configure(struct i40evf_adapter *adapter)
 910 {
 911         struct net_device *netdev = adapter->netdev;
 912         int i;
 913
 914         i40evf_set_rx_mode(netdev);
 915
 916         i40evf_configure_tx(adapter);
 917         i40evf_configure_rx(adapter);
 918         adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
 919
 920         for (i = 0; i < adapter->num_active_queues; i++) {
 921                 struct i40e_ring *ring = adapter->rx_rings[i];
 922
 923                 i40evf_alloc_rx_buffers_1buf(ring, ring->count);
 924                 ring->next_to_use = ring->count - 1;
 925                 writel(ring->next_to_use, ring->tail);
 926         }
 927 }
 928
 929 /**
 930  * i40evf_up_complete - Finish the last steps of bringing up a connection
 931  * @adapter: board private structure
 932  **/
 933 static int i40evf_up_complete(struct i40evf_adapter *adapter)
 934 {
 935         adapter->state = __I40EVF_RUNNING;
 936         clear_bit(__I40E_DOWN, &adapter->vsi.state);
 937
 938         i40evf_napi_enable_all(adapter);
 939
 940         adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES;
 941         mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
 942         return 0;
 943 }
 944
 945 /**
 946  * i40e_down - Shutdown the connection processing
 947  * @adapter: board private structure
 948  **/
 949 void i40evf_down(struct i40evf_adapter *adapter)
 950 {
 951         struct net_device *netdev = adapter->netdev;
 952         struct i40evf_mac_filter *f;
 953
 954         if (adapter->state == __I40EVF_DOWN)
 955                 return;
 956
 957         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 958                                 &adapter->crit_section))
 959                 usleep_range(500, 1000);
 960
 961         i40evf_irq_disable(adapter);
 962         i40evf_napi_disable_all(adapter);
 963
 964         /* remove all MAC filters */
 965         list_for_each_entry(f, &adapter->mac_filter_list, list) {
 966                 f->remove = true;
 967         }
 968         /* remove all VLAN filters */
 969         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
 970                 f->remove = true;
 971         }
 972         if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) &&
 973             adapter->state != __I40EVF_RESETTING) {
 974                 /* cancel any current operation */
 975                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
 976                 adapter->aq_pending = 0;
 977                 /* Schedule operations to close down the HW. Don't wait
 978                  * here for this to complete. The watchdog is still running
 979                  * and it will take care of this.
 980                  */
 981                 adapter->aq_required = I40EVF_FLAG_AQ_DEL_MAC_FILTER;
 982                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
 983                 adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
 984         }
 985         netif_tx_disable(netdev);
 986
 987         netif_tx_stop_all_queues(netdev);
 988
 989         msleep(20);
 990
 991         netif_carrier_off(netdev);
 992         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 993 }
 994
 995 /**
 996  * i40evf_acquire_msix_vectors - Setup the MSIX capability
 997  * @adapter: board private structure
 998  * @vectors: number of vectors to request
 999  *
1000  * Work with the OS to set up the MSIX vectors needed.
1001  *
1002  * Returns 0 on success, negative on failure
1003  **/
1004 static int
1005 i40evf_acquire_msix_vectors(struct i40evf_adapter *adapter, int vectors)
1006 {
1007         int err, vector_threshold;
1008
1009         /* We'll want at least 3 (vector_threshold):
1010          * 0) Other (Admin Queue and link, mostly)
1011          * 1) TxQ[0] Cleanup
1012          * 2) RxQ[0] Cleanup
1013          */
1014         vector_threshold = MIN_MSIX_COUNT;
1015
1016         /* The more we get, the more we will assign to Tx/Rx Cleanup
1017          * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1018          * Right now, we simply care about how many we'll get; we'll
1019          * set them up later while requesting irq's.
1020          */
1021         err = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
1022                                     vector_threshold, vectors);
1023         if (err < 0) {
1024                 dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts\n");
1025                 kfree(adapter->msix_entries);
1026                 adapter->msix_entries = NULL;
1027                 return err;
1028         }
1029
1030         /* Adjust for only the vectors we'll use, which is minimum
1031          * of max_msix_q_vectors + NONQ_VECS, or the number of
1032          * vectors we were allocated.
1033          */
1034         adapter->num_msix_vectors = err;
1035         return 0;
1036 }
1037
1038 /**
1039  * i40evf_free_queues - Free memory for all rings
1040  * @adapter: board private structure to initialize
1041  *
1042  * Free all of the memory associated with queue pairs.
1043  **/
1044 static void i40evf_free_queues(struct i40evf_adapter *adapter)
1045 {
1046         int i;
1047
1048         if (!adapter->vsi_res)
1049                 return;
1050         for (i = 0; i < adapter->num_active_queues; i++) {
1051                 if (adapter->tx_rings[i])
1052                         kfree_rcu(adapter->tx_rings[i], rcu);
1053                 adapter->tx_rings[i] = NULL;
1054                 adapter->rx_rings[i] = NULL;
1055         }
1056 }
1057
1058 /**
1059  * i40evf_alloc_queues - Allocate memory for all rings
1060  * @adapter: board private structure to initialize
1061  *
1062  * We allocate one ring per queue at run-time since we don't know the
1063  * number of queues at compile-time.  The polling_netdev array is
1064  * intended for Multiqueue, but should work fine with a single queue.
1065  **/
1066 static int i40evf_alloc_queues(struct i40evf_adapter *adapter)
1067 {
1068         int i;
1069
1070         for (i = 0; i < adapter->num_active_queues; i++) {
1071                 struct i40e_ring *tx_ring;
1072                 struct i40e_ring *rx_ring;
1073
1074                 tx_ring = kzalloc(sizeof(*tx_ring) * 2, GFP_KERNEL);
1075                 if (!tx_ring)
1076                         goto err_out;
1077
1078                 tx_ring->queue_index = i;
1079                 tx_ring->netdev = adapter->netdev;
1080                 tx_ring->dev = &adapter->pdev->dev;
1081                 tx_ring->count = adapter->tx_desc_count;
1082                 adapter->tx_rings[i] = tx_ring;
1083
1084                 rx_ring = &tx_ring[1];
1085                 rx_ring->queue_index = i;
1086                 rx_ring->netdev = adapter->netdev;
1087                 rx_ring->dev = &adapter->pdev->dev;
1088                 rx_ring->count = adapter->rx_desc_count;
1089                 adapter->rx_rings[i] = rx_ring;
1090         }
1091
1092         return 0;
1093
1094 err_out:
1095         i40evf_free_queues(adapter);
1096         return -ENOMEM;
1097 }
1098
1099 /**
1100  * i40evf_set_interrupt_capability - set MSI-X or FAIL if not supported
1101  * @adapter: board private structure to initialize
1102  *
1103  * Attempt to configure the interrupts using the best available
1104  * capabilities of the hardware and the kernel.
1105  **/
1106 static int i40evf_set_interrupt_capability(struct i40evf_adapter *adapter)
1107 {
1108         int vector, v_budget;
1109         int pairs = 0;
1110         int err = 0;
1111
1112         if (!adapter->vsi_res) {
1113                 err = -EIO;
1114                 goto out;
1115         }
1116         pairs = adapter->num_active_queues;
1117
1118         /* It's easy to be greedy for MSI-X vectors, but it really
1119          * doesn't do us much good if we have a lot more vectors
1120          * than CPU's.  So let's be conservative and only ask for
1121          * (roughly) twice the number of vectors as there are CPU's.
1122          */
1123         v_budget = min_t(int, pairs, (int)(num_online_cpus() * 2)) + NONQ_VECS;
1124         v_budget = min_t(int, v_budget, (int)adapter->vf_res->max_vectors);
1125
1126         adapter->msix_entries = kcalloc(v_budget,
1127                                         sizeof(struct msix_entry), GFP_KERNEL);
1128         if (!adapter->msix_entries) {
1129                 err = -ENOMEM;
1130                 goto out;
1131         }
1132
1133         for (vector = 0; vector < v_budget; vector++)
1134                 adapter->msix_entries[vector].entry = vector;
1135
1136         i40evf_acquire_msix_vectors(adapter, v_budget);
1137
1138 out:
1139         adapter->netdev->real_num_tx_queues = pairs;
1140         return err;
1141 }
1142
1143 /**
1144  * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors
1145  * @adapter: board private structure to initialize
1146  *
1147  * We allocate one q_vector per queue interrupt.  If allocation fails we
1148  * return -ENOMEM.
1149  **/
1150 static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
1151 {
1152         int q_idx, num_q_vectors;
1153         struct i40e_q_vector *q_vector;
1154
1155         num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1156
1157         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1158                 q_vector = kzalloc(sizeof(*q_vector), GFP_KERNEL);
1159                 if (!q_vector)
1160                         goto err_out;
1161                 q_vector->adapter = adapter;
1162                 q_vector->vsi = &adapter->vsi;
1163                 q_vector->v_idx = q_idx;
1164                 netif_napi_add(adapter->netdev, &q_vector->napi,
1165                                i40evf_napi_poll, NAPI_POLL_WEIGHT);
1166                 adapter->q_vector[q_idx] = q_vector;
1167         }
1168
1169         return 0;
1170
1171 err_out:
1172         while (q_idx) {
1173                 q_idx--;
1174                 q_vector = adapter->q_vector[q_idx];
1175                 netif_napi_del(&q_vector->napi);
1176                 kfree(q_vector);
1177                 adapter->q_vector[q_idx] = NULL;
1178         }
1179         return -ENOMEM;
1180 }
1181
1182 /**
1183  * i40evf_free_q_vectors - Free memory allocated for interrupt vectors
1184  * @adapter: board private structure to initialize
1185  *
1186  * This function frees the memory allocated to the q_vectors.  In addition if
1187  * NAPI is enabled it will delete any references to the NAPI struct prior
1188  * to freeing the q_vector.
1189  **/
1190 static void i40evf_free_q_vectors(struct i40evf_adapter *adapter)
1191 {
1192         int q_idx, num_q_vectors;
1193         int napi_vectors;
1194
1195         num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1196         napi_vectors = adapter->num_active_queues;
1197
1198         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1199                 struct i40e_q_vector *q_vector = adapter->q_vector[q_idx];
1200
1201                 adapter->q_vector[q_idx] = NULL;
1202                 if (q_idx < napi_vectors)
1203                         netif_napi_del(&q_vector->napi);
1204                 kfree(q_vector);
1205         }
1206 }
1207
1208 /**
1209  * i40evf_reset_interrupt_capability - Reset MSIX setup
1210  * @adapter: board private structure
1211  *
1212  **/
1213 void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
1214 {
1215         pci_disable_msix(adapter->pdev);
1216         kfree(adapter->msix_entries);
1217         adapter->msix_entries = NULL;
1218 }
1219
1220 /**
1221  * i40evf_init_interrupt_scheme - Determine if MSIX is supported and init
1222  * @adapter: board private structure to initialize
1223  *
1224  **/
1225 int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter)
1226 {
1227         int err;
1228
1229         err = i40evf_set_interrupt_capability(adapter);
1230         if (err) {
1231                 dev_err(&adapter->pdev->dev,
1232                         "Unable to setup interrupt capabilities\n");
1233                 goto err_set_interrupt;
1234         }
1235
1236         err = i40evf_alloc_q_vectors(adapter);
1237         if (err) {
1238                 dev_err(&adapter->pdev->dev,
1239                         "Unable to allocate memory for queue vectors\n");
1240                 goto err_alloc_q_vectors;
1241         }
1242
1243         err = i40evf_alloc_queues(adapter);
1244         if (err) {
1245                 dev_err(&adapter->pdev->dev,
1246                         "Unable to allocate memory for queues\n");
1247                 goto err_alloc_queues;
1248         }
1249
1250         dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
1251                  (adapter->num_active_queues > 1) ? "Enabled" : "Disabled",
1252                  adapter->num_active_queues);
1253
1254         return 0;
1255 err_alloc_queues:
1256         i40evf_free_q_vectors(adapter);
1257 err_alloc_q_vectors:
1258         i40evf_reset_interrupt_capability(adapter);
1259 err_set_interrupt:
1260         return err;
1261 }
1262
1263 /**
1264  * i40evf_watchdog_timer - Periodic call-back timer
1265  * @data: pointer to adapter disguised as unsigned long
1266  **/
1267 static void i40evf_watchdog_timer(unsigned long data)
1268 {
1269         struct i40evf_adapter *adapter = (struct i40evf_adapter *)data;
1270
1271         schedule_work(&adapter->watchdog_task);
1272         /* timer will be rescheduled in watchdog task */
1273 }
1274
1275 /**
1276  * i40evf_watchdog_task - Periodic call-back task
1277  * @work: pointer to work_struct
1278  **/
1279 static void i40evf_watchdog_task(struct work_struct *work)
1280 {
1281         struct i40evf_adapter *adapter = container_of(work,
1282                                                       struct i40evf_adapter,
1283                                                       watchdog_task);
1284         struct i40e_hw *hw = &adapter->hw;
1285         uint32_t rstat_val;
1286
1287         if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
1288                 goto restart_watchdog;
1289
1290         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1291                 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1292                             I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1293                 if ((rstat_val == I40E_VFR_VFACTIVE) ||
1294                     (rstat_val == I40E_VFR_COMPLETED)) {
1295                         /* A chance for redemption! */
1296                         dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
1297                         adapter->state = __I40EVF_STARTUP;
1298                         adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1299                         schedule_delayed_work(&adapter->init_task, 10);
1300                         clear_bit(__I40EVF_IN_CRITICAL_TASK,
1301                                   &adapter->crit_section);
1302                         /* Don't reschedule the watchdog, since we've restarted
1303                          * the init task. When init_task contacts the PF and
1304                          * gets everything set up again, it'll restart the
1305                          * watchdog for us. Down, boy. Sit. Stay. Woof.
1306                          */
1307                         return;
1308                 }
1309                 adapter->aq_pending = 0;
1310                 adapter->aq_required = 0;
1311                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1312                 goto watchdog_done;
1313         }
1314
1315         if ((adapter->state < __I40EVF_DOWN) ||
1316             (adapter->flags & I40EVF_FLAG_RESET_PENDING))
1317                 goto watchdog_done;
1318
1319         /* check for reset */
1320         rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1321                     I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1322         if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) &&
1323             (rstat_val != I40E_VFR_VFACTIVE) &&
1324             (rstat_val != I40E_VFR_COMPLETED)) {
1325                 adapter->state = __I40EVF_RESETTING;
1326                 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1327                 dev_err(&adapter->pdev->dev, "Hardware reset detected\n");
1328                 schedule_work(&adapter->reset_task);
1329                 adapter->aq_pending = 0;
1330                 adapter->aq_required = 0;
1331                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1332                 goto watchdog_done;
1333         }
1334
1335         /* Process admin queue tasks. After init, everything gets done
1336          * here so we don't race on the admin queue.
1337          */
1338         if (adapter->aq_pending) {
1339                 if (!i40evf_asq_done(hw)) {
1340                         dev_dbg(&adapter->pdev->dev, "Admin queue timeout\n");
1341                         i40evf_send_api_ver(adapter);
1342                 }
1343                 goto watchdog_done;
1344         }
1345
1346         if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
1347                 i40evf_map_queues(adapter);
1348                 goto watchdog_done;
1349         }
1350
1351         if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
1352                 i40evf_add_ether_addrs(adapter);
1353                 goto watchdog_done;
1354         }
1355
1356         if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
1357                 i40evf_add_vlans(adapter);
1358                 goto watchdog_done;
1359         }
1360
1361         if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
1362                 i40evf_del_ether_addrs(adapter);
1363                 goto watchdog_done;
1364         }
1365
1366         if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
1367                 i40evf_del_vlans(adapter);
1368                 goto watchdog_done;
1369         }
1370
1371         if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
1372                 i40evf_disable_queues(adapter);
1373                 goto watchdog_done;
1374         }
1375
1376         if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
1377                 i40evf_configure_queues(adapter);
1378                 goto watchdog_done;
1379         }
1380
1381         if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
1382                 i40evf_enable_queues(adapter);
1383                 goto watchdog_done;
1384         }
1385
1386         if (adapter->state == __I40EVF_RUNNING)
1387                 i40evf_request_stats(adapter);
1388 watchdog_done:
1389         if (adapter->state == __I40EVF_RUNNING) {
1390                 i40evf_irq_enable_queues(adapter, ~0);
1391                 i40evf_fire_sw_int(adapter, 0xFF);
1392         } else {
1393                 i40evf_fire_sw_int(adapter, 0x1);
1394         }
1395
1396         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1397 restart_watchdog:
1398         if (adapter->state == __I40EVF_REMOVE)
1399                 return;
1400         if (adapter->aq_required)
1401                 mod_timer(&adapter->watchdog_timer,
1402                           jiffies + msecs_to_jiffies(20));
1403         else
1404                 mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
1405         schedule_work(&adapter->adminq_task);
1406 }
1407
1408 /**
1409  * next_queue - increment to next available tx queue
1410  * @adapter: board private structure
1411  * @j: queue counter
1412  *
1413  * Helper function for RSS programming to increment through available
1414  * queus. Returns the next queue value.
1415  **/
1416 static int next_queue(struct i40evf_adapter *adapter, int j)
1417 {
1418         j += 1;
1419
1420         return j >= adapter->num_active_queues ? 0 : j;
1421 }
1422
1423 /**
1424  * i40evf_configure_rss - Prepare for RSS if used
1425  * @adapter: board private structure
1426  **/
1427 static void i40evf_configure_rss(struct i40evf_adapter *adapter)
1428 {
1429         u32 rss_key[I40E_VFQF_HKEY_MAX_INDEX + 1];
1430         struct i40e_hw *hw = &adapter->hw;
1431         u32 lut = 0;
1432         int i, j;
1433         u64 hena;
1434
1435         /* No RSS for single queue. */
1436         if (adapter->num_active_queues == 1) {
1437                 wr32(hw, I40E_VFQF_HENA(0), 0);
1438                 wr32(hw, I40E_VFQF_HENA(1), 0);
1439                 return;
1440         }
1441
1442         /* Hash type is configured by the PF - we just supply the key */
1443         netdev_rss_key_fill(rss_key, sizeof(rss_key));
1444         for (i = 0; i <= I40E_VFQF_HKEY_MAX_INDEX; i++)
1445                 wr32(hw, I40E_VFQF_HKEY(i), rss_key[i]);
1446
1447         /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
1448         hena = I40E_DEFAULT_RSS_HENA;
1449         wr32(hw, I40E_VFQF_HENA(0), (u32)hena);
1450         wr32(hw, I40E_VFQF_HENA(1), (u32)(hena >> 32));
1451
1452         /* Populate the LUT with max no. of queues in round robin fashion */
1453         j = adapter->num_active_queues;
1454         for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++) {
1455                 j = next_queue(adapter, j);
1456                 lut = j;
1457                 j = next_queue(adapter, j);
1458                 lut |= j << 8;
1459                 j = next_queue(adapter, j);
1460                 lut |= j << 16;
1461                 j = next_queue(adapter, j);
1462                 lut |= j << 24;
1463                 wr32(hw, I40E_VFQF_HLUT(i), lut);
1464         }
1465         i40e_flush(hw);
1466 }
1467
1468 #define I40EVF_RESET_WAIT_MS 100
1469 #define I40EVF_RESET_WAIT_COUNT 200
1470 /**
1471  * i40evf_reset_task - Call-back task to handle hardware reset
1472  * @work: pointer to work_struct
1473  *
1474  * During reset we need to shut down and reinitialize the admin queue
1475  * before we can use it to communicate with the PF again. We also clear
1476  * and reinit the rings because that context is lost as well.
1477  **/
1478 static void i40evf_reset_task(struct work_struct *work)
1479 {
1480         struct i40evf_adapter *adapter = container_of(work,
1481                                                       struct i40evf_adapter,
1482                                                       reset_task);
1483         struct net_device *netdev = adapter->netdev;
1484         struct i40e_hw *hw = &adapter->hw;
1485         struct i40evf_mac_filter *f;
1486         uint32_t rstat_val;
1487         int i = 0, err;
1488
1489         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1490                                 &adapter->crit_section))
1491                 usleep_range(500, 1000);
1492
1493         if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) {
1494                 dev_info(&adapter->pdev->dev, "Requesting reset from PF\n");
1495                 i40evf_request_reset(adapter);
1496         }
1497
1498         /* poll until we see the reset actually happen */
1499         for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1500                 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1501                             I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1502                 if ((rstat_val != I40E_VFR_VFACTIVE) &&
1503                     (rstat_val != I40E_VFR_COMPLETED))
1504                         break;
1505                 msleep(I40EVF_RESET_WAIT_MS);
1506         }
1507         if (i == I40EVF_RESET_WAIT_COUNT) {
1508                 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1509                 goto continue_reset; /* act like the reset happened */
1510         }
1511
1512         /* wait until the reset is complete and the PF is responding to us */
1513         for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1514                 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1515                             I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1516                 if ((rstat_val == I40E_VFR_VFACTIVE) ||
1517                     (rstat_val == I40E_VFR_COMPLETED))
1518                         break;
1519                 msleep(I40EVF_RESET_WAIT_MS);
1520         }
1521         if (i == I40EVF_RESET_WAIT_COUNT) {
1522                 struct i40evf_mac_filter *f, *ftmp;
1523                 struct i40evf_vlan_filter *fv, *fvtmp;
1524
1525                 /* reset never finished */
1526                 dev_err(&adapter->pdev->dev, "Reset never finished (%x)\n",
1527                         rstat_val);
1528                 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
1529
1530                 if (netif_running(adapter->netdev)) {
1531                         set_bit(__I40E_DOWN, &adapter->vsi.state);
1532                         i40evf_irq_disable(adapter);
1533                         i40evf_napi_disable_all(adapter);
1534                         netif_tx_disable(netdev);
1535                         netif_tx_stop_all_queues(netdev);
1536                         netif_carrier_off(netdev);
1537                         i40evf_free_traffic_irqs(adapter);
1538                         i40evf_free_all_tx_resources(adapter);
1539                         i40evf_free_all_rx_resources(adapter);
1540                 }
1541
1542                 /* Delete all of the filters, both MAC and VLAN. */
1543                 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list,
1544                                          list) {
1545                         list_del(&f->list);
1546                         kfree(f);
1547                 }
1548                 list_for_each_entry_safe(fv, fvtmp, &adapter->vlan_filter_list,
1549                                          list) {
1550                         list_del(&fv->list);
1551                         kfree(fv);
1552                 }
1553
1554                 i40evf_free_misc_irq(adapter);
1555                 i40evf_reset_interrupt_capability(adapter);
1556                 i40evf_free_queues(adapter);
1557                 i40evf_free_q_vectors(adapter);
1558                 kfree(adapter->vf_res);
1559                 i40evf_shutdown_adminq(hw);
1560                 adapter->netdev->flags &= ~IFF_UP;
1561                 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1562                 return; /* Do not attempt to reinit. It's dead, Jim. */
1563         }
1564
1565 continue_reset:
1566         adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1567
1568         i40evf_irq_disable(adapter);
1569         i40evf_napi_disable_all(adapter);
1570
1571         netif_tx_disable(netdev);
1572
1573         netif_tx_stop_all_queues(netdev);
1574
1575         netif_carrier_off(netdev);
1576         adapter->state = __I40EVF_RESETTING;
1577
1578         /* kill and reinit the admin queue */
1579         if (i40evf_shutdown_adminq(hw))
1580                 dev_warn(&adapter->pdev->dev, "Failed to shut down adminq\n");
1581         adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1582         err = i40evf_init_adminq(hw);
1583         if (err)
1584                 dev_info(&adapter->pdev->dev, "Failed to init adminq: %d\n",
1585                          err);
1586
1587         i40evf_map_queues(adapter);
1588
1589         /* re-add all MAC filters */
1590         list_for_each_entry(f, &adapter->mac_filter_list, list) {
1591                 f->add = true;
1592         }
1593         /* re-add all VLAN filters */
1594         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
1595                 f->add = true;
1596         }
1597         adapter->aq_required = I40EVF_FLAG_AQ_ADD_MAC_FILTER;
1598         adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
1599         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1600
1601         mod_timer(&adapter->watchdog_timer, jiffies + 2);
1602
1603         if (netif_running(adapter->netdev)) {
1604                 /* allocate transmit descriptors */
1605                 err = i40evf_setup_all_tx_resources(adapter);
1606                 if (err)
1607                         goto reset_err;
1608
1609                 /* allocate receive descriptors */
1610                 err = i40evf_setup_all_rx_resources(adapter);
1611                 if (err)
1612                         goto reset_err;
1613
1614                 i40evf_configure(adapter);
1615
1616                 err = i40evf_up_complete(adapter);
1617                 if (err)
1618                         goto reset_err;
1619
1620                 i40evf_irq_enable(adapter, true);
1621         }
1622         return;
1623 reset_err:
1624         dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
1625         i40evf_close(adapter->netdev);
1626 }
1627
1628 /**
1629  * i40evf_adminq_task - worker thread to clean the admin queue
1630  * @work: pointer to work_struct containing our data
1631  **/
1632 static void i40evf_adminq_task(struct work_struct *work)
1633 {
1634         struct i40evf_adapter *adapter =
1635                 container_of(work, struct i40evf_adapter, adminq_task);
1636         struct i40e_hw *hw = &adapter->hw;
1637         struct i40e_arq_event_info event;
1638         struct i40e_virtchnl_msg *v_msg;
1639         i40e_status ret;
1640         u32 val, oldval;
1641         u16 pending;
1642
1643         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
1644                 goto out;
1645
1646         event.buf_len = I40EVF_MAX_AQ_BUF_SIZE;
1647         event.msg_buf = kzalloc(event.buf_len, GFP_KERNEL);
1648         if (!event.msg_buf)
1649                 goto out;
1650
1651         v_msg = (struct i40e_virtchnl_msg *)&event.desc;
1652         do {
1653                 ret = i40evf_clean_arq_element(hw, &event, &pending);
1654                 if (ret || !v_msg->v_opcode)
1655                         break; /* No event to process or error cleaning ARQ */
1656
1657                 i40evf_virtchnl_completion(adapter, v_msg->v_opcode,
1658                                            v_msg->v_retval, event.msg_buf,
1659                                            event.msg_len);
1660                 if (pending != 0)
1661                         memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
1662         } while (pending);
1663
1664         /* check for error indications */
1665         val = rd32(hw, hw->aq.arq.len);
1666         oldval = val;
1667         if (val & I40E_VF_ARQLEN_ARQVFE_MASK) {
1668                 dev_info(&adapter->pdev->dev, "ARQ VF Error detected\n");
1669                 val &= ~I40E_VF_ARQLEN_ARQVFE_MASK;
1670         }
1671         if (val & I40E_VF_ARQLEN_ARQOVFL_MASK) {
1672                 dev_info(&adapter->pdev->dev, "ARQ Overflow Error detected\n");
1673                 val &= ~I40E_VF_ARQLEN_ARQOVFL_MASK;
1674         }
1675         if (val & I40E_VF_ARQLEN_ARQCRIT_MASK) {
1676                 dev_info(&adapter->pdev->dev, "ARQ Critical Error detected\n");
1677                 val &= ~I40E_VF_ARQLEN_ARQCRIT_MASK;
1678         }
1679         if (oldval != val)
1680                 wr32(hw, hw->aq.arq.len, val);
1681
1682         val = rd32(hw, hw->aq.asq.len);
1683         oldval = val;
1684         if (val & I40E_VF_ATQLEN_ATQVFE_MASK) {
1685                 dev_info(&adapter->pdev->dev, "ASQ VF Error detected\n");
1686                 val &= ~I40E_VF_ATQLEN_ATQVFE_MASK;
1687         }
1688         if (val & I40E_VF_ATQLEN_ATQOVFL_MASK) {
1689                 dev_info(&adapter->pdev->dev, "ASQ Overflow Error detected\n");
1690                 val &= ~I40E_VF_ATQLEN_ATQOVFL_MASK;
1691         }
1692         if (val & I40E_VF_ATQLEN_ATQCRIT_MASK) {
1693                 dev_info(&adapter->pdev->dev, "ASQ Critical Error detected\n");
1694                 val &= ~I40E_VF_ATQLEN_ATQCRIT_MASK;
1695         }
1696         if (oldval != val)
1697                 wr32(hw, hw->aq.asq.len, val);
1698
1699         kfree(event.msg_buf);
1700 out:
1701         /* re-enable Admin queue interrupt cause */
1702         i40evf_misc_irq_enable(adapter);
1703 }
1704
1705 /**
1706  * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
1707  * @adapter: board private structure
1708  *
1709  * Free all transmit software resources
1710  **/
1711 static void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
1712 {
1713         int i;
1714
1715         for (i = 0; i < adapter->num_active_queues; i++)
1716                 if (adapter->tx_rings[i]->desc)
1717                         i40evf_free_tx_resources(adapter->tx_rings[i]);
1718 }
1719
1720 /**
1721  * i40evf_setup_all_tx_resources - allocate all queues Tx resources
1722  * @adapter: board private structure
1723  *
1724  * If this function returns with an error, then it's possible one or
1725  * more of the rings is populated (while the rest are not).  It is the
1726  * callers duty to clean those orphaned rings.
1727  *
1728  * Return 0 on success, negative on failure
1729  **/
1730 static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter)
1731 {
1732         int i, err = 0;
1733
1734         for (i = 0; i < adapter->num_active_queues; i++) {
1735                 adapter->tx_rings[i]->count = adapter->tx_desc_count;
1736                 err = i40evf_setup_tx_descriptors(adapter->tx_rings[i]);
1737                 if (!err)
1738                         continue;
1739                 dev_err(&adapter->pdev->dev,
1740                         "%s: Allocation for Tx Queue %u failed\n",
1741                         __func__, i);
1742                 break;
1743         }
1744
1745         return err;
1746 }
1747
1748 /**
1749  * i40evf_setup_all_rx_resources - allocate all queues Rx resources
1750  * @adapter: board private structure
1751  *
1752  * If this function returns with an error, then it's possible one or
1753  * more of the rings is populated (while the rest are not).  It is the
1754  * callers duty to clean those orphaned rings.
1755  *
1756  * Return 0 on success, negative on failure
1757  **/
1758 static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter)
1759 {
1760         int i, err = 0;
1761
1762         for (i = 0; i < adapter->num_active_queues; i++) {
1763                 adapter->rx_rings[i]->count = adapter->rx_desc_count;
1764                 err = i40evf_setup_rx_descriptors(adapter->rx_rings[i]);
1765                 if (!err)
1766                         continue;
1767                 dev_err(&adapter->pdev->dev,
1768                         "%s: Allocation for Rx Queue %u failed\n",
1769                         __func__, i);
1770                 break;
1771         }
1772         return err;
1773 }
1774
1775 /**
1776  * i40evf_free_all_rx_resources - Free Rx Resources for All Queues
1777  * @adapter: board private structure
1778  *
1779  * Free all receive software resources
1780  **/
1781 static void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
1782 {
1783         int i;
1784
1785         for (i = 0; i < adapter->num_active_queues; i++)
1786                 if (adapter->rx_rings[i]->desc)
1787                         i40evf_free_rx_resources(adapter->rx_rings[i]);
1788 }
1789
1790 /**
1791  * i40evf_open - Called when a network interface is made active
1792  * @netdev: network interface device structure
1793  *
1794  * Returns 0 on success, negative value on failure
1795  *
1796  * The open entry point is called when a network interface is made
1797  * active by the system (IFF_UP).  At this point all resources needed
1798  * for transmit and receive operations are allocated, the interrupt
1799  * handler is registered with the OS, the watchdog timer is started,
1800  * and the stack is notified that the interface is ready.
1801  **/
1802 static int i40evf_open(struct net_device *netdev)
1803 {
1804         struct i40evf_adapter *adapter = netdev_priv(netdev);
1805         int err;
1806
1807         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1808                 dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
1809                 return -EIO;
1810         }
1811         if (adapter->state != __I40EVF_DOWN)
1812                 return -EBUSY;
1813
1814         /* allocate transmit descriptors */
1815         err = i40evf_setup_all_tx_resources(adapter);
1816         if (err)
1817                 goto err_setup_tx;
1818
1819         /* allocate receive descriptors */
1820         err = i40evf_setup_all_rx_resources(adapter);
1821         if (err)
1822                 goto err_setup_rx;
1823
1824         /* clear any pending interrupts, may auto mask */
1825         err = i40evf_request_traffic_irqs(adapter, netdev->name);
1826         if (err)
1827                 goto err_req_irq;
1828
1829         i40evf_configure(adapter);
1830
1831         err = i40evf_up_complete(adapter);
1832         if (err)
1833                 goto err_req_irq;
1834
1835         i40evf_irq_enable(adapter, true);
1836
1837         return 0;
1838
1839 err_req_irq:
1840         i40evf_down(adapter);
1841         i40evf_free_traffic_irqs(adapter);
1842 err_setup_rx:
1843         i40evf_free_all_rx_resources(adapter);
1844 err_setup_tx:
1845         i40evf_free_all_tx_resources(adapter);
1846
1847         return err;
1848 }
1849
1850 /**
1851  * i40evf_close - Disables a network interface
1852  * @netdev: network interface device structure
1853  *
1854  * Returns 0, this is not allowed to fail
1855  *
1856  * The close entry point is called when an interface is de-activated
1857  * by the OS.  The hardware is still under the drivers control, but
1858  * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
1859  * are freed, along with all transmit and receive resources.
1860  **/
1861 static int i40evf_close(struct net_device *netdev)
1862 {
1863         struct i40evf_adapter *adapter = netdev_priv(netdev);
1864
1865         if (adapter->state <= __I40EVF_DOWN)
1866                 return 0;
1867
1868
1869         set_bit(__I40E_DOWN, &adapter->vsi.state);
1870
1871         i40evf_down(adapter);
1872         adapter->state = __I40EVF_DOWN;
1873         i40evf_free_traffic_irqs(adapter);
1874
1875         i40evf_free_all_tx_resources(adapter);
1876         i40evf_free_all_rx_resources(adapter);
1877
1878         return 0;
1879 }
1880
1881 /**
1882  * i40evf_get_stats - Get System Network Statistics
1883  * @netdev: network interface device structure
1884  *
1885  * Returns the address of the device statistics structure.
1886  * The statistics are actually updated from the timer callback.
1887  **/
1888 static struct net_device_stats *i40evf_get_stats(struct net_device *netdev)
1889 {
1890         struct i40evf_adapter *adapter = netdev_priv(netdev);
1891
1892         /* only return the current stats */
1893         return &adapter->net_stats;
1894 }
1895
1896 /**
1897  * i40evf_reinit_locked - Software reinit
1898  * @adapter: board private structure
1899  *
1900  * Reinititalizes the ring structures in response to a software configuration
1901  * change. Roughly the same as close followed by open, but skips releasing
1902  * and reallocating the interrupts.
1903  **/
1904 void i40evf_reinit_locked(struct i40evf_adapter *adapter)
1905 {
1906         struct net_device *netdev = adapter->netdev;
1907         int err;
1908
1909         WARN_ON(in_interrupt());
1910
1911         i40evf_down(adapter);
1912
1913         /* allocate transmit descriptors */
1914         err = i40evf_setup_all_tx_resources(adapter);
1915         if (err)
1916                 goto err_reinit;
1917
1918         /* allocate receive descriptors */
1919         err = i40evf_setup_all_rx_resources(adapter);
1920         if (err)
1921                 goto err_reinit;
1922
1923         i40evf_configure(adapter);
1924
1925         err = i40evf_up_complete(adapter);
1926         if (err)
1927                 goto err_reinit;
1928
1929         i40evf_irq_enable(adapter, true);
1930         return;
1931
1932 err_reinit:
1933         dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
1934         i40evf_close(netdev);
1935 }
1936
1937 /**
1938  * i40evf_change_mtu - Change the Maximum Transfer Unit
1939  * @netdev: network interface device structure
1940  * @new_mtu: new value for maximum frame size
1941  *
1942  * Returns 0 on success, negative on failure
1943  **/
1944 static int i40evf_change_mtu(struct net_device *netdev, int new_mtu)
1945 {
1946         struct i40evf_adapter *adapter = netdev_priv(netdev);
1947         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
1948
1949         if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
1950                 return -EINVAL;
1951
1952         /* must set new MTU before calling down or up */
1953         netdev->mtu = new_mtu;
1954         i40evf_reinit_locked(adapter);
1955         return 0;
1956 }
1957
1958 static const struct net_device_ops i40evf_netdev_ops = {
1959         .ndo_open               = i40evf_open,
1960         .ndo_stop               = i40evf_close,
1961         .ndo_start_xmit         = i40evf_xmit_frame,
1962         .ndo_get_stats          = i40evf_get_stats,
1963         .ndo_set_rx_mode        = i40evf_set_rx_mode,
1964         .ndo_validate_addr      = eth_validate_addr,
1965         .ndo_set_mac_address    = i40evf_set_mac,
1966         .ndo_change_mtu         = i40evf_change_mtu,
1967         .ndo_tx_timeout         = i40evf_tx_timeout,
1968         .ndo_vlan_rx_add_vid    = i40evf_vlan_rx_add_vid,
1969         .ndo_vlan_rx_kill_vid   = i40evf_vlan_rx_kill_vid,
1970 };
1971
1972 /**
1973  * i40evf_check_reset_complete - check that VF reset is complete
1974  * @hw: pointer to hw struct
1975  *
1976  * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
1977  **/
1978 static int i40evf_check_reset_complete(struct i40e_hw *hw)
1979 {
1980         u32 rstat;
1981         int i;
1982
1983         for (i = 0; i < 100; i++) {
1984                 rstat = rd32(hw, I40E_VFGEN_RSTAT) &
1985                             I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1986                 if ((rstat == I40E_VFR_VFACTIVE) ||
1987                     (rstat == I40E_VFR_COMPLETED))
1988                         return 0;
1989                 usleep_range(10, 20);
1990         }
1991         return -EBUSY;
1992 }
1993
1994 /**
1995  * i40evf_init_task - worker thread to perform delayed initialization
1996  * @work: pointer to work_struct containing our data
1997  *
1998  * This task completes the work that was begun in probe. Due to the nature
1999  * of VF-PF communications, we may need to wait tens of milliseconds to get
2000  * reponses back from the PF. Rather than busy-wait in probe and bog down the
2001  * whole system, we'll do it in a task so we can sleep.
2002  * This task only runs during driver init. Once we've established
2003  * communications with the PF driver and set up our netdev, the watchdog
2004  * takes over.
2005  **/
2006 static void i40evf_init_task(struct work_struct *work)
2007 {
2008         struct i40evf_adapter *adapter = container_of(work,
2009                                                       struct i40evf_adapter,
2010                                                       init_task.work);
2011         struct net_device *netdev = adapter->netdev;
2012         struct i40evf_mac_filter *f;
2013         struct i40e_hw *hw = &adapter->hw;
2014         struct pci_dev *pdev = adapter->pdev;
2015         int i, err, bufsz;
2016
2017         switch (adapter->state) {
2018         case __I40EVF_STARTUP:
2019                 /* driver loaded, probe complete */
2020                 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
2021                 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
2022                 err = i40e_set_mac_type(hw);
2023                 if (err) {
2024                         dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
2025                                 err);
2026                 goto err;
2027                 }
2028                 err = i40evf_check_reset_complete(hw);
2029                 if (err) {
2030                         dev_info(&pdev->dev, "Device is still in reset (%d), retrying\n",
2031                                  err);
2032                         goto err;
2033                 }
2034                 hw->aq.num_arq_entries = I40EVF_AQ_LEN;
2035                 hw->aq.num_asq_entries = I40EVF_AQ_LEN;
2036                 hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2037                 hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2038
2039                 err = i40evf_init_adminq(hw);
2040                 if (err) {
2041                         dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
2042                                 err);
2043                         goto err;
2044                 }
2045                 err = i40evf_send_api_ver(adapter);
2046                 if (err) {
2047                         dev_err(&pdev->dev, "Unable to send to PF (%d)\n", err);
2048                         i40evf_shutdown_adminq(hw);
2049                         goto err;
2050                 }
2051                 adapter->state = __I40EVF_INIT_VERSION_CHECK;
2052                 goto restart;
2053         case __I40EVF_INIT_VERSION_CHECK:
2054                 if (!i40evf_asq_done(hw)) {
2055                         dev_err(&pdev->dev, "Admin queue command never completed\n");
2056                         i40evf_shutdown_adminq(hw);
2057                         adapter->state = __I40EVF_STARTUP;
2058                         goto err;
2059                 }
2060
2061                 /* aq msg sent, awaiting reply */
2062                 err = i40evf_verify_api_ver(adapter);
2063                 if (err) {
2064                         if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
2065                                 err = i40evf_send_api_ver(adapter);
2066                         goto err;
2067                 }
2068                 err = i40evf_send_vf_config_msg(adapter);
2069                 if (err) {
2070                         dev_err(&pdev->dev, "Unable to send config request (%d)\n",
2071                                 err);
2072                         goto err;
2073                 }
2074                 adapter->state = __I40EVF_INIT_GET_RESOURCES;
2075                 goto restart;
2076         case __I40EVF_INIT_GET_RESOURCES:
2077                 /* aq msg sent, awaiting reply */
2078                 if (!adapter->vf_res) {
2079                         bufsz = sizeof(struct i40e_virtchnl_vf_resource) +
2080                                 (I40E_MAX_VF_VSI *
2081                                  sizeof(struct i40e_virtchnl_vsi_resource));
2082                         adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
2083                         if (!adapter->vf_res)
2084                                 goto err;
2085                 }
2086                 err = i40evf_get_vf_config(adapter);
2087                 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK) {
2088                         err = i40evf_send_vf_config_msg(adapter);
2089                         goto err;
2090                 }
2091                 if (err) {
2092                         dev_err(&pdev->dev, "Unable to get VF config (%d)\n",
2093                                 err);
2094                         goto err_alloc;
2095                 }
2096                 adapter->state = __I40EVF_INIT_SW;
2097                 break;
2098         default:
2099                 goto err_alloc;
2100         }
2101         /* got VF config message back from PF, now we can parse it */
2102         for (i = 0; i < adapter->vf_res->num_vsis; i++) {
2103                 if (adapter->vf_res->vsi_res[i].vsi_type == I40E_VSI_SRIOV)
2104                         adapter->vsi_res = &adapter->vf_res->vsi_res[i];
2105         }
2106         if (!adapter->vsi_res) {
2107                 dev_err(&pdev->dev, "No LAN VSI found\n");
2108                 goto err_alloc;
2109         }
2110
2111         adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
2112
2113         netdev->netdev_ops = &i40evf_netdev_ops;
2114         i40evf_set_ethtool_ops(netdev);
2115         netdev->watchdog_timeo = 5 * HZ;
2116         netdev->features |= NETIF_F_HIGHDMA |
2117                             NETIF_F_SG |
2118                             NETIF_F_IP_CSUM |
2119                             NETIF_F_SCTP_CSUM |
2120                             NETIF_F_IPV6_CSUM |
2121                             NETIF_F_TSO |
2122                             NETIF_F_TSO6 |
2123                             NETIF_F_RXCSUM |
2124                             NETIF_F_GRO;
2125
2126         if (adapter->vf_res->vf_offload_flags
2127             & I40E_VIRTCHNL_VF_OFFLOAD_VLAN) {
2128                 netdev->vlan_features = netdev->features;
2129                 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX |
2130                                     NETIF_F_HW_VLAN_CTAG_RX |
2131                                     NETIF_F_HW_VLAN_CTAG_FILTER;
2132         }
2133
2134         /* copy netdev features into list of user selectable features */
2135         netdev->hw_features |= netdev->features;
2136         netdev->hw_features &= ~NETIF_F_RXCSUM;
2137
2138         if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
2139                 dev_info(&pdev->dev, "Invalid MAC address %pM, using random\n",
2140                          adapter->hw.mac.addr);
2141                 random_ether_addr(adapter->hw.mac.addr);
2142         }
2143         ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
2144         ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
2145
2146         f = kzalloc(sizeof(*f), GFP_ATOMIC);
2147         if (!f)
2148                 goto err_sw_init;
2149
2150         ether_addr_copy(f->macaddr, adapter->hw.mac.addr);
2151         f->add = true;
2152         adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
2153
2154         list_add(&f->list, &adapter->mac_filter_list);
2155
2156         init_timer(&adapter->watchdog_timer);
2157         adapter->watchdog_timer.function = &i40evf_watchdog_timer;
2158         adapter->watchdog_timer.data = (unsigned long)adapter;
2159         mod_timer(&adapter->watchdog_timer, jiffies + 1);
2160
2161         adapter->num_active_queues = min_t(int,
2162                                            adapter->vsi_res->num_queue_pairs,
2163                                            (int)(num_online_cpus()));
2164         adapter->tx_desc_count = I40EVF_DEFAULT_TXD;
2165         adapter->rx_desc_count = I40EVF_DEFAULT_RXD;
2166         err = i40evf_init_interrupt_scheme(adapter);
2167         if (err)
2168                 goto err_sw_init;
2169         i40evf_map_rings_to_vectors(adapter);
2170         i40evf_configure_rss(adapter);
2171         err = i40evf_request_misc_irq(adapter);
2172         if (err)
2173                 goto err_sw_init;
2174
2175         netif_carrier_off(netdev);
2176
2177         adapter->vsi.id = adapter->vsi_res->vsi_id;
2178         adapter->vsi.seid = adapter->vsi_res->vsi_id; /* dummy */
2179         adapter->vsi.back = adapter;
2180         adapter->vsi.base_vector = 1;
2181         adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
2182         adapter->vsi.rx_itr_setting = (I40E_ITR_DYNAMIC |
2183                                        ITR_REG_TO_USEC(I40E_ITR_RX_DEF));
2184         adapter->vsi.tx_itr_setting = (I40E_ITR_DYNAMIC |
2185                                        ITR_REG_TO_USEC(I40E_ITR_TX_DEF));
2186         adapter->vsi.netdev = adapter->netdev;
2187
2188         if (!adapter->netdev_registered) {
2189                 err = register_netdev(netdev);
2190                 if (err)
2191                         goto err_register;
2192         }
2193
2194         adapter->netdev_registered = true;
2195
2196         netif_tx_stop_all_queues(netdev);
2197
2198         dev_info(&pdev->dev, "MAC address: %pM\n", adapter->hw.mac.addr);
2199         if (netdev->features & NETIF_F_GRO)
2200                 dev_info(&pdev->dev, "GRO is enabled\n");
2201
2202         dev_info(&pdev->dev, "%s\n", i40evf_driver_string);
2203         adapter->state = __I40EVF_DOWN;
2204         set_bit(__I40E_DOWN, &adapter->vsi.state);
2205         i40evf_misc_irq_enable(adapter);
2206         return;
2207 restart:
2208         schedule_delayed_work(&adapter->init_task,
2209                               msecs_to_jiffies(50));
2210         return;
2211
2212 err_register:
2213         i40evf_free_misc_irq(adapter);
2214 err_sw_init:
2215         i40evf_reset_interrupt_capability(adapter);
2216 err_alloc:
2217         kfree(adapter->vf_res);
2218         adapter->vf_res = NULL;
2219 err:
2220         /* Things went into the weeds, so try again later */
2221         if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
2222                 dev_err(&pdev->dev, "Failed to communicate with PF; giving up\n");
2223                 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
2224                 return; /* do not reschedule */
2225         }
2226         schedule_delayed_work(&adapter->init_task, HZ * 3);
2227 }
2228
2229 /**
2230  * i40evf_shutdown - Shutdown the device in preparation for a reboot
2231  * @pdev: pci device structure
2232  **/
2233 static void i40evf_shutdown(struct pci_dev *pdev)
2234 {
2235         struct net_device *netdev = pci_get_drvdata(pdev);
2236         struct i40evf_adapter *adapter = netdev_priv(netdev);
2237
2238         netif_device_detach(netdev);
2239
2240         if (netif_running(netdev))
2241                 i40evf_close(netdev);
2242
2243         /* Prevent the watchdog from running. */
2244         adapter->state = __I40EVF_REMOVE;
2245         adapter->aq_required = 0;
2246         adapter->aq_pending = 0;
2247
2248 #ifdef CONFIG_PM
2249         pci_save_state(pdev);
2250
2251 #endif
2252         pci_disable_device(pdev);
2253 }
2254
2255 /**
2256  * i40evf_probe - Device Initialization Routine
2257  * @pdev: PCI device information struct
2258  * @ent: entry in i40evf_pci_tbl
2259  *
2260  * Returns 0 on success, negative on failure
2261  *
2262  * i40evf_probe initializes an adapter identified by a pci_dev structure.
2263  * The OS initialization, configuring of the adapter private structure,
2264  * and a hardware reset occur.
2265  **/
2266 static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2267 {
2268         struct net_device *netdev;
2269         struct i40evf_adapter *adapter = NULL;
2270         struct i40e_hw *hw = NULL;
2271         int err;
2272
2273         err = pci_enable_device(pdev);
2274         if (err)
2275                 return err;
2276
2277         err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
2278         if (err) {
2279                 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2280                 if (err) {
2281                         dev_err(&pdev->dev,
2282                                 "DMA configuration failed: 0x%x\n", err);
2283                         goto err_dma;
2284                 }
2285         }
2286
2287         err = pci_request_regions(pdev, i40evf_driver_name);
2288         if (err) {
2289                 dev_err(&pdev->dev,
2290                         "pci_request_regions failed 0x%x\n", err);
2291                 goto err_pci_reg;
2292         }
2293
2294         pci_enable_pcie_error_reporting(pdev);
2295
2296         pci_set_master(pdev);
2297
2298         netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter),
2299                                    MAX_TX_QUEUES);
2300         if (!netdev) {
2301                 err = -ENOMEM;
2302                 goto err_alloc_etherdev;
2303         }
2304
2305         SET_NETDEV_DEV(netdev, &pdev->dev);
2306
2307         pci_set_drvdata(pdev, netdev);
2308         adapter = netdev_priv(netdev);
2309
2310         adapter->netdev = netdev;
2311         adapter->pdev = pdev;
2312
2313         hw = &adapter->hw;
2314         hw->back = adapter;
2315
2316         adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
2317         adapter->state = __I40EVF_STARTUP;
2318
2319         /* Call save state here because it relies on the adapter struct. */
2320         pci_save_state(pdev);
2321
2322         hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
2323                               pci_resource_len(pdev, 0));
2324         if (!hw->hw_addr) {
2325                 err = -EIO;
2326                 goto err_ioremap;
2327         }
2328         hw->vendor_id = pdev->vendor;
2329         hw->device_id = pdev->device;
2330         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2331         hw->subsystem_vendor_id = pdev->subsystem_vendor;
2332         hw->subsystem_device_id = pdev->subsystem_device;
2333         hw->bus.device = PCI_SLOT(pdev->devfn);
2334         hw->bus.func = PCI_FUNC(pdev->devfn);
2335
2336         INIT_LIST_HEAD(&adapter->mac_filter_list);
2337         INIT_LIST_HEAD(&adapter->vlan_filter_list);
2338
2339         INIT_WORK(&adapter->reset_task, i40evf_reset_task);
2340         INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
2341         INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
2342         INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
2343         schedule_delayed_work(&adapter->init_task, 10);
2344
2345         return 0;
2346
2347 err_ioremap:
2348         free_netdev(netdev);
2349 err_alloc_etherdev:
2350         pci_release_regions(pdev);
2351 err_pci_reg:
2352 err_dma:
2353         pci_disable_device(pdev);
2354         return err;
2355 }
2356
2357 #ifdef CONFIG_PM
2358 /**
2359  * i40evf_suspend - Power management suspend routine
2360  * @pdev: PCI device information struct
2361  * @state: unused
2362  *
2363  * Called when the system (VM) is entering sleep/suspend.
2364  **/
2365 static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
2366 {
2367         struct net_device *netdev = pci_get_drvdata(pdev);
2368         struct i40evf_adapter *adapter = netdev_priv(netdev);
2369         int retval = 0;
2370
2371         netif_device_detach(netdev);
2372
2373         if (netif_running(netdev)) {
2374                 rtnl_lock();
2375                 i40evf_down(adapter);
2376                 rtnl_unlock();
2377         }
2378         i40evf_free_misc_irq(adapter);
2379         i40evf_reset_interrupt_capability(adapter);
2380
2381         retval = pci_save_state(pdev);
2382         if (retval)
2383                 return retval;
2384
2385         pci_disable_device(pdev);
2386
2387         return 0;
2388 }
2389
2390 /**
2391  * i40evf_resume - Power managment resume routine
2392  * @pdev: PCI device information struct
2393  *
2394  * Called when the system (VM) is resumed from sleep/suspend.
2395  **/
2396 static int i40evf_resume(struct pci_dev *pdev)
2397 {
2398         struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
2399         struct net_device *netdev = adapter->netdev;
2400         u32 err;
2401
2402         pci_set_power_state(pdev, PCI_D0);
2403         pci_restore_state(pdev);
2404         /* pci_restore_state clears dev->state_saved so call
2405          * pci_save_state to restore it.
2406          */
2407         pci_save_state(pdev);
2408
2409         err = pci_enable_device_mem(pdev);
2410         if (err) {
2411                 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
2412                 return err;
2413         }
2414         pci_set_master(pdev);
2415
2416         rtnl_lock();
2417         err = i40evf_set_interrupt_capability(adapter);
2418         if (err) {
2419                 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
2420                 return err;
2421         }
2422         err = i40evf_request_misc_irq(adapter);
2423         rtnl_unlock();
2424         if (err) {
2425                 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
2426                 return err;
2427         }
2428
2429         schedule_work(&adapter->reset_task);
2430
2431         netif_device_attach(netdev);
2432
2433         return err;
2434 }
2435
2436 #endif /* CONFIG_PM */
2437 /**
2438  * i40evf_remove - Device Removal Routine
2439  * @pdev: PCI device information struct
2440  *
2441  * i40evf_remove is called by the PCI subsystem to alert the driver
2442  * that it should release a PCI device.  The could be caused by a
2443  * Hot-Plug event, or because the driver is going to be removed from
2444  * memory.
2445  **/
2446 static void i40evf_remove(struct pci_dev *pdev)
2447 {
2448         struct net_device *netdev = pci_get_drvdata(pdev);
2449         struct i40evf_adapter *adapter = netdev_priv(netdev);
2450         struct i40evf_mac_filter *f, *ftmp;
2451         struct i40e_hw *hw = &adapter->hw;
2452
2453         cancel_delayed_work_sync(&adapter->init_task);
2454         cancel_work_sync(&adapter->reset_task);
2455
2456         if (adapter->netdev_registered) {
2457                 unregister_netdev(netdev);
2458                 adapter->netdev_registered = false;
2459         }
2460
2461         /* Shut down all the garbage mashers on the detention level */
2462         adapter->state = __I40EVF_REMOVE;
2463         adapter->aq_required = 0;
2464         adapter->aq_pending = 0;
2465         i40evf_request_reset(adapter);
2466         msleep(20);
2467         /* If the FW isn't responding, kick it once, but only once. */
2468         if (!i40evf_asq_done(hw)) {
2469                 i40evf_request_reset(adapter);
2470                 msleep(20);
2471         }
2472
2473         if (adapter->msix_entries) {
2474                 i40evf_misc_irq_disable(adapter);
2475                 i40evf_free_misc_irq(adapter);
2476                 i40evf_reset_interrupt_capability(adapter);
2477                 i40evf_free_q_vectors(adapter);
2478         }
2479
2480         if (adapter->watchdog_timer.function)
2481                 del_timer_sync(&adapter->watchdog_timer);
2482
2483         flush_scheduled_work();
2484
2485         if (hw->aq.asq.count)
2486                 i40evf_shutdown_adminq(hw);
2487
2488         iounmap(hw->hw_addr);
2489         pci_release_regions(pdev);
2490
2491         i40evf_free_queues(adapter);
2492         kfree(adapter->vf_res);
2493         /* If we got removed before an up/down sequence, we've got a filter
2494          * hanging out there that we need to get rid of.
2495          */
2496         list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
2497                 list_del(&f->list);
2498                 kfree(f);
2499         }
2500         list_for_each_entry_safe(f, ftmp, &adapter->vlan_filter_list, list) {
2501                 list_del(&f->list);
2502                 kfree(f);
2503         }
2504
2505         free_netdev(netdev);
2506
2507         pci_disable_pcie_error_reporting(pdev);
2508
2509         pci_disable_device(pdev);
2510 }
2511
2512 static struct pci_driver i40evf_driver = {
2513         .name     = i40evf_driver_name,
2514         .id_table = i40evf_pci_tbl,
2515         .probe    = i40evf_probe,
2516         .remove   = i40evf_remove,
2517 #ifdef CONFIG_PM
2518         .suspend  = i40evf_suspend,
2519         .resume   = i40evf_resume,
2520 #endif
2521         .shutdown = i40evf_shutdown,
2522 };
2523
2524 /**
2525  * i40e_init_module - Driver Registration Routine
2526  *
2527  * i40e_init_module is the first routine called when the driver is
2528  * loaded. All it does is register with the PCI subsystem.
2529  **/
2530 static int __init i40evf_init_module(void)
2531 {
2532         int ret;
2533
2534         pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
2535                 i40evf_driver_version);
2536
2537         pr_info("%s\n", i40evf_copyright);
2538
2539         ret = pci_register_driver(&i40evf_driver);
2540         return ret;
2541 }
2542
2543 module_init(i40evf_init_module);
2544
2545 /**
2546  * i40e_exit_module - Driver Exit Cleanup Routine
2547  *
2548  * i40e_exit_module is called just before the driver is removed
2549  * from memory.
2550  **/
2551 static void __exit i40evf_exit_module(void)
2552 {
2553         pci_unregister_driver(&i40evf_driver);
2554 }
2555
2556 module_exit(i40evf_exit_module);
2557
2558 /* i40evf_main.c */