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

   1 /*******************************************************************************
   2  *
   3  * Intel Ethernet Controller XL710 Family Linux Virtual Function Driver
   4  * Copyright(c) 2013 - 2015 Intel Corporation.
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms and conditions of the GNU General Public License,
   8  * version 2, as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  * The full GNU General Public License is included in this distribution in
  19  * the file called "COPYING".
  20  *
  21  * Contact Information:
  22  * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  23  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  24  *
  25  ******************************************************************************/
  26
  27 #include "i40evf.h"
  28 #include "i40e_prototype.h"
  29 static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter);
  30 static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter);
  31 static int i40evf_close(struct net_device *netdev);
  32
  33 char i40evf_driver_name[] = "i40evf";
  34 static const char i40evf_driver_string[] =
  35         "Intel(R) XL710/X710 Virtual Function Network Driver";
  36
  37 #define DRV_VERSION "1.2.25"
  38 const char i40evf_driver_version[] = DRV_VERSION;
  39 static const char i40evf_copyright[] =
  40         "Copyright (c) 2013 - 2014 Intel Corporation.";
  41
  42 /* i40evf_pci_tbl - PCI Device ID Table
  43  *
  44  * Wildcard entries (PCI_ANY_ID) should come last
  45  * Last entry must be all 0s
  46  *
  47  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  48  *   Class, Class Mask, private data (not used) }
  49  */
  50 static const struct pci_device_id i40evf_pci_tbl[] = {
  51         {PCI_VDEVICE(INTEL, I40E_DEV_ID_VF), 0},
  52         /* required last entry */
  53         {0, }
  54 };
  55
  56 MODULE_DEVICE_TABLE(pci, i40evf_pci_tbl);
  57
  58 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
  59 MODULE_DESCRIPTION("Intel(R) XL710 X710 Virtual Function Network Driver");
  60 MODULE_LICENSE("GPL");
  61 MODULE_VERSION(DRV_VERSION);
  62
  63 /**
  64  * i40evf_allocate_dma_mem_d - OS specific memory alloc for shared code
  65  * @hw:   pointer to the HW structure
  66  * @mem:  ptr to mem struct to fill out
  67  * @size: size of memory requested
  68  * @alignment: what to align the allocation to
  69  **/
  70 i40e_status i40evf_allocate_dma_mem_d(struct i40e_hw *hw,
  71                                       struct i40e_dma_mem *mem,
  72                                       u64 size, u32 alignment)
  73 {
  74         struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
  75
  76         if (!mem)
  77                 return I40E_ERR_PARAM;
  78
  79         mem->size = ALIGN(size, alignment);
  80         mem->va = dma_alloc_coherent(&adapter->pdev->dev, mem->size,
  81                                      (dma_addr_t *)&mem->pa, GFP_KERNEL);
  82         if (mem->va)
  83                 return 0;
  84         else
  85                 return I40E_ERR_NO_MEMORY;
  86 }
  87
  88 /**
  89  * i40evf_free_dma_mem_d - OS specific memory free for shared code
  90  * @hw:   pointer to the HW structure
  91  * @mem:  ptr to mem struct to free
  92  **/
  93 i40e_status i40evf_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem)
  94 {
  95         struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
  96
  97         if (!mem || !mem->va)
  98                 return I40E_ERR_PARAM;
  99         dma_free_coherent(&adapter->pdev->dev, mem->size,
 100                           mem->va, (dma_addr_t)mem->pa);
 101         return 0;
 102 }
 103
 104 /**
 105  * i40evf_allocate_virt_mem_d - OS specific memory alloc for shared code
 106  * @hw:   pointer to the HW structure
 107  * @mem:  ptr to mem struct to fill out
 108  * @size: size of memory requested
 109  **/
 110 i40e_status i40evf_allocate_virt_mem_d(struct i40e_hw *hw,
 111                                        struct i40e_virt_mem *mem, u32 size)
 112 {
 113         if (!mem)
 114                 return I40E_ERR_PARAM;
 115
 116         mem->size = size;
 117         mem->va = kzalloc(size, GFP_KERNEL);
 118
 119         if (mem->va)
 120                 return 0;
 121         else
 122                 return I40E_ERR_NO_MEMORY;
 123 }
 124
 125 /**
 126  * i40evf_free_virt_mem_d - OS specific memory free for shared code
 127  * @hw:   pointer to the HW structure
 128  * @mem:  ptr to mem struct to free
 129  **/
 130 i40e_status i40evf_free_virt_mem_d(struct i40e_hw *hw,
 131                                    struct i40e_virt_mem *mem)
 132 {
 133         if (!mem)
 134                 return I40E_ERR_PARAM;
 135
 136         /* it's ok to kfree a NULL pointer */
 137         kfree(mem->va);
 138
 139         return 0;
 140 }
 141
 142 /**
 143  * i40evf_debug_d - OS dependent version of debug printing
 144  * @hw:  pointer to the HW structure
 145  * @mask: debug level mask
 146  * @fmt_str: printf-type format description
 147  **/
 148 void i40evf_debug_d(void *hw, u32 mask, char *fmt_str, ...)
 149 {
 150         char buf[512];
 151         va_list argptr;
 152
 153         if (!(mask & ((struct i40e_hw *)hw)->debug_mask))
 154                 return;
 155
 156         va_start(argptr, fmt_str);
 157         vsnprintf(buf, sizeof(buf), fmt_str, argptr);
 158         va_end(argptr);
 159
 160         /* the debug string is already formatted with a newline */
 161         pr_info("%s", buf);
 162 }
 163
 164 /**
 165  * i40evf_tx_timeout - Respond to a Tx Hang
 166  * @netdev: network interface device structure
 167  **/
 168 static void i40evf_tx_timeout(struct net_device *netdev)
 169 {
 170         struct i40evf_adapter *adapter = netdev_priv(netdev);
 171
 172         adapter->tx_timeout_count++;
 173         if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING)) {
 174                 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
 175                 schedule_work(&adapter->reset_task);
 176         }
 177 }
 178
 179 /**
 180  * i40evf_misc_irq_disable - Mask off interrupt generation on the NIC
 181  * @adapter: board private structure
 182  **/
 183 static void i40evf_misc_irq_disable(struct i40evf_adapter *adapter)
 184 {
 185         struct i40e_hw *hw = &adapter->hw;
 186
 187         wr32(hw, I40E_VFINT_DYN_CTL01, 0);
 188
 189         /* read flush */
 190         rd32(hw, I40E_VFGEN_RSTAT);
 191
 192         synchronize_irq(adapter->msix_entries[0].vector);
 193 }
 194
 195 /**
 196  * i40evf_misc_irq_enable - Enable default interrupt generation settings
 197  * @adapter: board private structure
 198  **/
 199 static void i40evf_misc_irq_enable(struct i40evf_adapter *adapter)
 200 {
 201         struct i40e_hw *hw = &adapter->hw;
 202
 203         wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK |
 204                                        I40E_VFINT_DYN_CTL01_ITR_INDX_MASK);
 205         wr32(hw, I40E_VFINT_ICR0_ENA1, I40E_VFINT_ICR0_ENA_ADMINQ_MASK);
 206
 207         /* read flush */
 208         rd32(hw, I40E_VFGEN_RSTAT);
 209 }
 210
 211 /**
 212  * i40evf_irq_disable - Mask off interrupt generation on the NIC
 213  * @adapter: board private structure
 214  **/
 215 static void i40evf_irq_disable(struct i40evf_adapter *adapter)
 216 {
 217         int i;
 218         struct i40e_hw *hw = &adapter->hw;
 219
 220         if (!adapter->msix_entries)
 221                 return;
 222
 223         for (i = 1; i < adapter->num_msix_vectors; i++) {
 224                 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), 0);
 225                 synchronize_irq(adapter->msix_entries[i].vector);
 226         }
 227         /* read flush */
 228         rd32(hw, I40E_VFGEN_RSTAT);
 229 }
 230
 231 /**
 232  * i40evf_irq_enable_queues - Enable interrupt for specified queues
 233  * @adapter: board private structure
 234  * @mask: bitmap of queues to enable
 235  **/
 236 void i40evf_irq_enable_queues(struct i40evf_adapter *adapter, u32 mask)
 237 {
 238         struct i40e_hw *hw = &adapter->hw;
 239         int i;
 240
 241         for (i = 1; i < adapter->num_msix_vectors; i++) {
 242                 if (mask & (1 << (i - 1))) {
 243                         wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1),
 244                              I40E_VFINT_DYN_CTLN1_INTENA_MASK |
 245                              I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
 246                              I40E_VFINT_DYN_CTLN_CLEARPBA_MASK);
 247                 }
 248         }
 249 }
 250
 251 /**
 252  * i40evf_fire_sw_int - Generate SW interrupt for specified vectors
 253  * @adapter: board private structure
 254  * @mask: bitmap of vectors to trigger
 255  **/
 256 static void i40evf_fire_sw_int(struct i40evf_adapter *adapter, u32 mask)
 257 {
 258         struct i40e_hw *hw = &adapter->hw;
 259         int i;
 260         uint32_t dyn_ctl;
 261
 262         if (mask & 1) {
 263                 dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTL01);
 264                 dyn_ctl |= I40E_VFINT_DYN_CTLN_SWINT_TRIG_MASK |
 265                            I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
 266                            I40E_VFINT_DYN_CTLN_CLEARPBA_MASK;
 267                 wr32(hw, I40E_VFINT_DYN_CTL01, dyn_ctl);
 268         }
 269         for (i = 1; i < adapter->num_msix_vectors; i++) {
 270                 if (mask & (1 << i)) {
 271                         dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTLN1(i - 1));
 272                         dyn_ctl |= I40E_VFINT_DYN_CTLN_SWINT_TRIG_MASK |
 273                                    I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
 274                                    I40E_VFINT_DYN_CTLN_CLEARPBA_MASK;
 275                         wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), dyn_ctl);
 276                 }
 277         }
 278 }
 279
 280 /**
 281  * i40evf_irq_enable - Enable default interrupt generation settings
 282  * @adapter: board private structure
 283  **/
 284 void i40evf_irq_enable(struct i40evf_adapter *adapter, bool flush)
 285 {
 286         struct i40e_hw *hw = &adapter->hw;
 287
 288         i40evf_misc_irq_enable(adapter);
 289         i40evf_irq_enable_queues(adapter, ~0);
 290
 291         if (flush)
 292                 rd32(hw, I40E_VFGEN_RSTAT);
 293 }
 294
 295 /**
 296  * i40evf_msix_aq - Interrupt handler for vector 0
 297  * @irq: interrupt number
 298  * @data: pointer to netdev
 299  **/
 300 static irqreturn_t i40evf_msix_aq(int irq, void *data)
 301 {
 302         struct net_device *netdev = data;
 303         struct i40evf_adapter *adapter = netdev_priv(netdev);
 304         struct i40e_hw *hw = &adapter->hw;
 305         u32 val;
 306         u32 ena_mask;
 307
 308         /* handle non-queue interrupts */
 309         val = rd32(hw, I40E_VFINT_ICR01);
 310         ena_mask = rd32(hw, I40E_VFINT_ICR0_ENA1);
 311
 312
 313         val = rd32(hw, I40E_VFINT_DYN_CTL01);
 314         val = val | I40E_PFINT_DYN_CTL0_CLEARPBA_MASK;
 315         wr32(hw, I40E_VFINT_DYN_CTL01, val);
 316
 317         /* schedule work on the private workqueue */
 318         schedule_work(&adapter->adminq_task);
 319
 320         return IRQ_HANDLED;
 321 }
 322
 323 /**
 324  * i40evf_msix_clean_rings - MSIX mode Interrupt Handler
 325  * @irq: interrupt number
 326  * @data: pointer to a q_vector
 327  **/
 328 static irqreturn_t i40evf_msix_clean_rings(int irq, void *data)
 329 {
 330         struct i40e_q_vector *q_vector = data;
 331
 332         if (!q_vector->tx.ring && !q_vector->rx.ring)
 333                 return IRQ_HANDLED;
 334
 335         napi_schedule(&q_vector->napi);
 336
 337         return IRQ_HANDLED;
 338 }
 339
 340 /**
 341  * i40evf_map_vector_to_rxq - associate irqs with rx queues
 342  * @adapter: board private structure
 343  * @v_idx: interrupt number
 344  * @r_idx: queue number
 345  **/
 346 static void
 347 i40evf_map_vector_to_rxq(struct i40evf_adapter *adapter, int v_idx, int r_idx)
 348 {
 349         struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
 350         struct i40e_ring *rx_ring = adapter->rx_rings[r_idx];
 351
 352         rx_ring->q_vector = q_vector;
 353         rx_ring->next = q_vector->rx.ring;
 354         rx_ring->vsi = &adapter->vsi;
 355         q_vector->rx.ring = rx_ring;
 356         q_vector->rx.count++;
 357         q_vector->rx.latency_range = I40E_LOW_LATENCY;
 358 }
 359
 360 /**
 361  * i40evf_map_vector_to_txq - associate irqs with tx queues
 362  * @adapter: board private structure
 363  * @v_idx: interrupt number
 364  * @t_idx: queue number
 365  **/
 366 static void
 367 i40evf_map_vector_to_txq(struct i40evf_adapter *adapter, int v_idx, int t_idx)
 368 {
 369         struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
 370         struct i40e_ring *tx_ring = adapter->tx_rings[t_idx];
 371
 372         tx_ring->q_vector = q_vector;
 373         tx_ring->next = q_vector->tx.ring;
 374         tx_ring->vsi = &adapter->vsi;
 375         q_vector->tx.ring = tx_ring;
 376         q_vector->tx.count++;
 377         q_vector->tx.latency_range = I40E_LOW_LATENCY;
 378         q_vector->num_ringpairs++;
 379         q_vector->ring_mask |= (1 << t_idx);
 380 }
 381
 382 /**
 383  * i40evf_map_rings_to_vectors - Maps descriptor rings to vectors
 384  * @adapter: board private structure to initialize
 385  *
 386  * This function maps descriptor rings to the queue-specific vectors
 387  * we were allotted through the MSI-X enabling code.  Ideally, we'd have
 388  * one vector per ring/queue, but on a constrained vector budget, we
 389  * group the rings as "efficiently" as possible.  You would add new
 390  * mapping configurations in here.
 391  **/
 392 static int i40evf_map_rings_to_vectors(struct i40evf_adapter *adapter)
 393 {
 394         int q_vectors;
 395         int v_start = 0;
 396         int rxr_idx = 0, txr_idx = 0;
 397         int rxr_remaining = adapter->num_active_queues;
 398         int txr_remaining = adapter->num_active_queues;
 399         int i, j;
 400         int rqpv, tqpv;
 401         int err = 0;
 402
 403         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 404
 405         /* The ideal configuration...
 406          * We have enough vectors to map one per queue.
 407          */
 408         if (q_vectors == (rxr_remaining * 2)) {
 409                 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
 410                         i40evf_map_vector_to_rxq(adapter, v_start, rxr_idx);
 411
 412                 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
 413                         i40evf_map_vector_to_txq(adapter, v_start, txr_idx);
 414                 goto out;
 415         }
 416
 417         /* If we don't have enough vectors for a 1-to-1
 418          * mapping, we'll have to group them so there are
 419          * multiple queues per vector.
 420          * Re-adjusting *qpv takes care of the remainder.
 421          */
 422         for (i = v_start; i < q_vectors; i++) {
 423                 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
 424                 for (j = 0; j < rqpv; j++) {
 425                         i40evf_map_vector_to_rxq(adapter, i, rxr_idx);
 426                         rxr_idx++;
 427                         rxr_remaining--;
 428                 }
 429         }
 430         for (i = v_start; i < q_vectors; i++) {
 431                 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
 432                 for (j = 0; j < tqpv; j++) {
 433                         i40evf_map_vector_to_txq(adapter, i, txr_idx);
 434                         txr_idx++;
 435                         txr_remaining--;
 436                 }
 437         }
 438
 439 out:
 440         adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
 441
 442         return err;
 443 }
 444
 445 /**
 446  * i40evf_request_traffic_irqs - Initialize MSI-X interrupts
 447  * @adapter: board private structure
 448  *
 449  * Allocates MSI-X vectors for tx and rx handling, and requests
 450  * interrupts from the kernel.
 451  **/
 452 static int
 453 i40evf_request_traffic_irqs(struct i40evf_adapter *adapter, char *basename)
 454 {
 455         int vector, err, q_vectors;
 456         int rx_int_idx = 0, tx_int_idx = 0;
 457
 458         i40evf_irq_disable(adapter);
 459         /* Decrement for Other and TCP Timer vectors */
 460         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 461
 462         for (vector = 0; vector < q_vectors; vector++) {
 463                 struct i40e_q_vector *q_vector = adapter->q_vector[vector];
 464
 465                 if (q_vector->tx.ring && q_vector->rx.ring) {
 466                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 467                                  "i40evf-%s-%s-%d", basename,
 468                                  "TxRx", rx_int_idx++);
 469                         tx_int_idx++;
 470                 } else if (q_vector->rx.ring) {
 471                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 472                                  "i40evf-%s-%s-%d", basename,
 473                                  "rx", rx_int_idx++);
 474                 } else if (q_vector->tx.ring) {
 475                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 476                                  "i40evf-%s-%s-%d", basename,
 477                                  "tx", tx_int_idx++);
 478                 } else {
 479                         /* skip this unused q_vector */
 480                         continue;
 481                 }
 482                 err = request_irq(
 483                         adapter->msix_entries[vector + NONQ_VECS].vector,
 484                         i40evf_msix_clean_rings,
 485                         0,
 486                         q_vector->name,
 487                         q_vector);
 488                 if (err) {
 489                         dev_info(&adapter->pdev->dev,
 490                                  "%s: request_irq failed, error: %d\n",
 491                                 __func__, err);
 492                         goto free_queue_irqs;
 493                 }
 494                 /* assign the mask for this irq */
 495                 irq_set_affinity_hint(
 496                         adapter->msix_entries[vector + NONQ_VECS].vector,
 497                         q_vector->affinity_mask);
 498         }
 499
 500         return 0;
 501
 502 free_queue_irqs:
 503         while (vector) {
 504                 vector--;
 505                 irq_set_affinity_hint(
 506                         adapter->msix_entries[vector + NONQ_VECS].vector,
 507                         NULL);
 508                 free_irq(adapter->msix_entries[vector + NONQ_VECS].vector,
 509                          adapter->q_vector[vector]);
 510         }
 511         return err;
 512 }
 513
 514 /**
 515  * i40evf_request_misc_irq - Initialize MSI-X interrupts
 516  * @adapter: board private structure
 517  *
 518  * Allocates MSI-X vector 0 and requests interrupts from the kernel. This
 519  * vector is only for the admin queue, and stays active even when the netdev
 520  * is closed.
 521  **/
 522 static int i40evf_request_misc_irq(struct i40evf_adapter *adapter)
 523 {
 524         struct net_device *netdev = adapter->netdev;
 525         int err;
 526
 527         snprintf(adapter->misc_vector_name,
 528                  sizeof(adapter->misc_vector_name) - 1, "i40evf-%s:mbx",
 529                  dev_name(&adapter->pdev->dev));
 530         err = request_irq(adapter->msix_entries[0].vector,
 531                           &i40evf_msix_aq, 0,
 532                           adapter->misc_vector_name, netdev);
 533         if (err) {
 534                 dev_err(&adapter->pdev->dev,
 535                         "request_irq for %s failed: %d\n",
 536                         adapter->misc_vector_name, err);
 537                 free_irq(adapter->msix_entries[0].vector, netdev);
 538         }
 539         return err;
 540 }
 541
 542 /**
 543  * i40evf_free_traffic_irqs - Free MSI-X interrupts
 544  * @adapter: board private structure
 545  *
 546  * Frees all MSI-X vectors other than 0.
 547  **/
 548 static void i40evf_free_traffic_irqs(struct i40evf_adapter *adapter)
 549 {
 550         int i;
 551         int q_vectors;
 552
 553         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 554
 555         for (i = 0; i < q_vectors; i++) {
 556                 irq_set_affinity_hint(adapter->msix_entries[i+1].vector,
 557                                       NULL);
 558                 free_irq(adapter->msix_entries[i+1].vector,
 559                          adapter->q_vector[i]);
 560         }
 561 }
 562
 563 /**
 564  * i40evf_free_misc_irq - Free MSI-X miscellaneous vector
 565  * @adapter: board private structure
 566  *
 567  * Frees MSI-X vector 0.
 568  **/
 569 static void i40evf_free_misc_irq(struct i40evf_adapter *adapter)
 570 {
 571         struct net_device *netdev = adapter->netdev;
 572
 573         free_irq(adapter->msix_entries[0].vector, netdev);
 574 }
 575
 576 /**
 577  * i40evf_configure_tx - Configure Transmit Unit after Reset
 578  * @adapter: board private structure
 579  *
 580  * Configure the Tx unit of the MAC after a reset.
 581  **/
 582 static void i40evf_configure_tx(struct i40evf_adapter *adapter)
 583 {
 584         struct i40e_hw *hw = &adapter->hw;
 585         int i;
 586
 587         for (i = 0; i < adapter->num_active_queues; i++)
 588                 adapter->tx_rings[i]->tail = hw->hw_addr + I40E_QTX_TAIL1(i);
 589 }
 590
 591 /**
 592  * i40evf_configure_rx - Configure Receive Unit after Reset
 593  * @adapter: board private structure
 594  *
 595  * Configure the Rx unit of the MAC after a reset.
 596  **/
 597 static void i40evf_configure_rx(struct i40evf_adapter *adapter)
 598 {
 599         struct i40e_hw *hw = &adapter->hw;
 600         struct net_device *netdev = adapter->netdev;
 601         int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
 602         int i;
 603         int rx_buf_len;
 604
 605
 606         adapter->flags &= ~I40EVF_FLAG_RX_PS_CAPABLE;
 607         adapter->flags |= I40EVF_FLAG_RX_1BUF_CAPABLE;
 608
 609         /* Decide whether to use packet split mode or not */
 610         if (netdev->mtu > ETH_DATA_LEN) {
 611                 if (adapter->flags & I40EVF_FLAG_RX_PS_CAPABLE)
 612                         adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
 613                 else
 614                         adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
 615         } else {
 616                 if (adapter->flags & I40EVF_FLAG_RX_1BUF_CAPABLE)
 617                         adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
 618                 else
 619                         adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
 620         }
 621
 622         /* Set the RX buffer length according to the mode */
 623         if (adapter->flags & I40EVF_FLAG_RX_PS_ENABLED) {
 624                 rx_buf_len = I40E_RX_HDR_SIZE;
 625         } else {
 626                 if (netdev->mtu <= ETH_DATA_LEN)
 627                         rx_buf_len = I40EVF_RXBUFFER_2048;
 628                 else
 629                         rx_buf_len = ALIGN(max_frame, 1024);
 630         }
 631
 632         for (i = 0; i < adapter->num_active_queues; i++) {
 633                 adapter->rx_rings[i]->tail = hw->hw_addr + I40E_QRX_TAIL1(i);
 634                 adapter->rx_rings[i]->rx_buf_len = rx_buf_len;
 635         }
 636 }
 637
 638 /**
 639  * i40evf_find_vlan - Search filter list for specific vlan filter
 640  * @adapter: board private structure
 641  * @vlan: vlan tag
 642  *
 643  * Returns ptr to the filter object or NULL
 644  **/
 645 static struct
 646 i40evf_vlan_filter *i40evf_find_vlan(struct i40evf_adapter *adapter, u16 vlan)
 647 {
 648         struct i40evf_vlan_filter *f;
 649
 650         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
 651                 if (vlan == f->vlan)
 652                         return f;
 653         }
 654         return NULL;
 655 }
 656
 657 /**
 658  * i40evf_add_vlan - Add a vlan filter to the list
 659  * @adapter: board private structure
 660  * @vlan: VLAN tag
 661  *
 662  * Returns ptr to the filter object or NULL when no memory available.
 663  **/
 664 static struct
 665 i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan)
 666 {
 667         struct i40evf_vlan_filter *f = NULL;
 668         int count = 50;
 669
 670         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 671                                 &adapter->crit_section)) {
 672                 udelay(1);
 673                 if (--count == 0)
 674                         goto out;
 675         }
 676
 677         f = i40evf_find_vlan(adapter, vlan);
 678         if (!f) {
 679                 f = kzalloc(sizeof(*f), GFP_ATOMIC);
 680                 if (!f)
 681                         goto clearout;
 682
 683                 f->vlan = vlan;
 684
 685                 INIT_LIST_HEAD(&f->list);
 686                 list_add(&f->list, &adapter->vlan_filter_list);
 687                 f->add = true;
 688                 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
 689         }
 690
 691 clearout:
 692         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 693 out:
 694         return f;
 695 }
 696
 697 /**
 698  * i40evf_del_vlan - Remove a vlan filter from the list
 699  * @adapter: board private structure
 700  * @vlan: VLAN tag
 701  **/
 702 static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan)
 703 {
 704         struct i40evf_vlan_filter *f;
 705         int count = 50;
 706
 707         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 708                                 &adapter->crit_section)) {
 709                 udelay(1);
 710                 if (--count == 0)
 711                         return;
 712         }
 713
 714         f = i40evf_find_vlan(adapter, vlan);
 715         if (f) {
 716                 f->remove = true;
 717                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
 718         }
 719         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 720 }
 721
 722 /**
 723  * i40evf_vlan_rx_add_vid - Add a VLAN filter to a device
 724  * @netdev: network device struct
 725  * @vid: VLAN tag
 726  **/
 727 static int i40evf_vlan_rx_add_vid(struct net_device *netdev,
 728                                   __always_unused __be16 proto, u16 vid)
 729 {
 730         struct i40evf_adapter *adapter = netdev_priv(netdev);
 731
 732         if (i40evf_add_vlan(adapter, vid) == NULL)
 733                 return -ENOMEM;
 734         return 0;
 735 }
 736
 737 /**
 738  * i40evf_vlan_rx_kill_vid - Remove a VLAN filter from a device
 739  * @netdev: network device struct
 740  * @vid: VLAN tag
 741  **/
 742 static int i40evf_vlan_rx_kill_vid(struct net_device *netdev,
 743                                    __always_unused __be16 proto, u16 vid)
 744 {
 745         struct i40evf_adapter *adapter = netdev_priv(netdev);
 746
 747         i40evf_del_vlan(adapter, vid);
 748         return 0;
 749 }
 750
 751 /**
 752  * i40evf_find_filter - Search filter list for specific mac filter
 753  * @adapter: board private structure
 754  * @macaddr: the MAC address
 755  *
 756  * Returns ptr to the filter object or NULL
 757  **/
 758 static struct
 759 i40evf_mac_filter *i40evf_find_filter(struct i40evf_adapter *adapter,
 760                                       u8 *macaddr)
 761 {
 762         struct i40evf_mac_filter *f;
 763
 764         if (!macaddr)
 765                 return NULL;
 766
 767         list_for_each_entry(f, &adapter->mac_filter_list, list) {
 768                 if (ether_addr_equal(macaddr, f->macaddr))
 769                         return f;
 770         }
 771         return NULL;
 772 }
 773
 774 /**
 775  * i40e_add_filter - Add a mac filter to the filter list
 776  * @adapter: board private structure
 777  * @macaddr: the MAC address
 778  *
 779  * Returns ptr to the filter object or NULL when no memory available.
 780  **/
 781 static struct
 782 i40evf_mac_filter *i40evf_add_filter(struct i40evf_adapter *adapter,
 783                                      u8 *macaddr)
 784 {
 785         struct i40evf_mac_filter *f;
 786         int count = 50;
 787
 788         if (!macaddr)
 789                 return NULL;
 790
 791         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 792                                 &adapter->crit_section)) {
 793                 udelay(1);
 794                 if (--count == 0)
 795                         return NULL;
 796         }
 797
 798         f = i40evf_find_filter(adapter, macaddr);
 799         if (!f) {
 800                 f = kzalloc(sizeof(*f), GFP_ATOMIC);
 801                 if (!f) {
 802                         clear_bit(__I40EVF_IN_CRITICAL_TASK,
 803                                   &adapter->crit_section);
 804                         return NULL;
 805                 }
 806
 807                 ether_addr_copy(f->macaddr, macaddr);
 808
 809                 list_add(&f->list, &adapter->mac_filter_list);
 810                 f->add = true;
 811                 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
 812         }
 813
 814         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 815         return f;
 816 }
 817
 818 /**
 819  * i40evf_set_mac - NDO callback to set port mac address
 820  * @netdev: network interface device structure
 821  * @p: pointer to an address structure
 822  *
 823  * Returns 0 on success, negative on failure
 824  **/
 825 static int i40evf_set_mac(struct net_device *netdev, void *p)
 826 {
 827         struct i40evf_adapter *adapter = netdev_priv(netdev);
 828         struct i40e_hw *hw = &adapter->hw;
 829         struct i40evf_mac_filter *f;
 830         struct sockaddr *addr = p;
 831
 832         if (!is_valid_ether_addr(addr->sa_data))
 833                 return -EADDRNOTAVAIL;
 834
 835         if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
 836                 return 0;
 837
 838         f = i40evf_add_filter(adapter, addr->sa_data);
 839         if (f) {
 840                 ether_addr_copy(hw->mac.addr, addr->sa_data);
 841                 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
 842         }
 843
 844         return (f == NULL) ? -ENOMEM : 0;
 845 }
 846
 847 /**
 848  * i40evf_set_rx_mode - NDO callback to set the netdev filters
 849  * @netdev: network interface device structure
 850  **/
 851 static void i40evf_set_rx_mode(struct net_device *netdev)
 852 {
 853         struct i40evf_adapter *adapter = netdev_priv(netdev);
 854         struct i40evf_mac_filter *f, *ftmp;
 855         struct netdev_hw_addr *uca;
 856         struct netdev_hw_addr *mca;
 857         int count = 50;
 858
 859         /* add addr if not already in the filter list */
 860         netdev_for_each_uc_addr(uca, netdev) {
 861                 i40evf_add_filter(adapter, uca->addr);
 862         }
 863         netdev_for_each_mc_addr(mca, netdev) {
 864                 i40evf_add_filter(adapter, mca->addr);
 865         }
 866
 867         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 868                                 &adapter->crit_section)) {
 869                 udelay(1);
 870                 if (--count == 0) {
 871                         dev_err(&adapter->pdev->dev,
 872                                 "Failed to get lock in %s\n", __func__);
 873                         return;
 874                 }
 875         }
 876         /* remove filter if not in netdev list */
 877         list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
 878                 bool found = false;
 879
 880                 if (is_multicast_ether_addr(f->macaddr)) {
 881                         netdev_for_each_mc_addr(mca, netdev) {
 882                                 if (ether_addr_equal(mca->addr, f->macaddr)) {
 883                                         found = true;
 884                                         break;
 885                                 }
 886                         }
 887                 } else {
 888                         netdev_for_each_uc_addr(uca, netdev) {
 889                                 if (ether_addr_equal(uca->addr, f->macaddr)) {
 890                                         found = true;
 891                                         break;
 892                                 }
 893                         }
 894                 }
 895                 if (found) {
 896                         f->remove = true;
 897                         adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
 898                 }
 899         }
 900         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 901 }
 902
 903 /**
 904  * i40evf_napi_enable_all - enable NAPI on all queue vectors
 905  * @adapter: board private structure
 906  **/
 907 static void i40evf_napi_enable_all(struct i40evf_adapter *adapter)
 908 {
 909         int q_idx;
 910         struct i40e_q_vector *q_vector;
 911         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 912
 913         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
 914                 struct napi_struct *napi;
 915
 916                 q_vector = adapter->q_vector[q_idx];
 917                 napi = &q_vector->napi;
 918                 napi_enable(napi);
 919         }
 920 }
 921
 922 /**
 923  * i40evf_napi_disable_all - disable NAPI on all queue vectors
 924  * @adapter: board private structure
 925  **/
 926 static void i40evf_napi_disable_all(struct i40evf_adapter *adapter)
 927 {
 928         int q_idx;
 929         struct i40e_q_vector *q_vector;
 930         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 931
 932         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
 933                 q_vector = adapter->q_vector[q_idx];
 934                 napi_disable(&q_vector->napi);
 935         }
 936 }
 937
 938 /**
 939  * i40evf_configure - set up transmit and receive data structures
 940  * @adapter: board private structure
 941  **/
 942 static void i40evf_configure(struct i40evf_adapter *adapter)
 943 {
 944         struct net_device *netdev = adapter->netdev;
 945         int i;
 946
 947         i40evf_set_rx_mode(netdev);
 948
 949         i40evf_configure_tx(adapter);
 950         i40evf_configure_rx(adapter);
 951         adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
 952
 953         for (i = 0; i < adapter->num_active_queues; i++) {
 954                 struct i40e_ring *ring = adapter->rx_rings[i];
 955
 956                 i40evf_alloc_rx_buffers_1buf(ring, ring->count);
 957                 ring->next_to_use = ring->count - 1;
 958                 writel(ring->next_to_use, ring->tail);
 959         }
 960 }
 961
 962 /**
 963  * i40evf_up_complete - Finish the last steps of bringing up a connection
 964  * @adapter: board private structure
 965  **/
 966 static int i40evf_up_complete(struct i40evf_adapter *adapter)
 967 {
 968         adapter->state = __I40EVF_RUNNING;
 969         clear_bit(__I40E_DOWN, &adapter->vsi.state);
 970
 971         i40evf_napi_enable_all(adapter);
 972
 973         adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES;
 974         mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
 975         return 0;
 976 }
 977
 978 /**
 979  * i40e_down - Shutdown the connection processing
 980  * @adapter: board private structure
 981  **/
 982 void i40evf_down(struct i40evf_adapter *adapter)
 983 {
 984         struct net_device *netdev = adapter->netdev;
 985         struct i40evf_mac_filter *f;
 986
 987         if (adapter->state == __I40EVF_DOWN)
 988                 return;
 989
 990         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 991                                 &adapter->crit_section))
 992                 usleep_range(500, 1000);
 993
 994         netif_carrier_off(netdev);
 995         netif_tx_disable(netdev);
 996         i40evf_napi_disable_all(adapter);
 997         i40evf_irq_disable(adapter);
 998
 999         /* remove all MAC filters */
1000         list_for_each_entry(f, &adapter->mac_filter_list, list) {
1001                 f->remove = true;
1002         }
1003         /* remove all VLAN filters */
1004         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
1005                 f->remove = true;
1006         }
1007         if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) &&
1008             adapter->state != __I40EVF_RESETTING) {
1009                 /* cancel any current operation */
1010                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1011                 adapter->aq_pending = 0;
1012                 /* Schedule operations to close down the HW. Don't wait
1013                  * here for this to complete. The watchdog is still running
1014                  * and it will take care of this.
1015                  */
1016                 adapter->aq_required = I40EVF_FLAG_AQ_DEL_MAC_FILTER;
1017                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
1018                 adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
1019         }
1020
1021         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1022 }
1023
1024 /**
1025  * i40evf_acquire_msix_vectors - Setup the MSIX capability
1026  * @adapter: board private structure
1027  * @vectors: number of vectors to request
1028  *
1029  * Work with the OS to set up the MSIX vectors needed.
1030  *
1031  * Returns 0 on success, negative on failure
1032  **/
1033 static int
1034 i40evf_acquire_msix_vectors(struct i40evf_adapter *adapter, int vectors)
1035 {
1036         int err, vector_threshold;
1037
1038         /* We'll want at least 3 (vector_threshold):
1039          * 0) Other (Admin Queue and link, mostly)
1040          * 1) TxQ[0] Cleanup
1041          * 2) RxQ[0] Cleanup
1042          */
1043         vector_threshold = MIN_MSIX_COUNT;
1044
1045         /* The more we get, the more we will assign to Tx/Rx Cleanup
1046          * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1047          * Right now, we simply care about how many we'll get; we'll
1048          * set them up later while requesting irq's.
1049          */
1050         err = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
1051                                     vector_threshold, vectors);
1052         if (err < 0) {
1053                 dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts\n");
1054                 kfree(adapter->msix_entries);
1055                 adapter->msix_entries = NULL;
1056                 return err;
1057         }
1058
1059         /* Adjust for only the vectors we'll use, which is minimum
1060          * of max_msix_q_vectors + NONQ_VECS, or the number of
1061          * vectors we were allocated.
1062          */
1063         adapter->num_msix_vectors = err;
1064         return 0;
1065 }
1066
1067 /**
1068  * i40evf_free_queues - Free memory for all rings
1069  * @adapter: board private structure to initialize
1070  *
1071  * Free all of the memory associated with queue pairs.
1072  **/
1073 static void i40evf_free_queues(struct i40evf_adapter *adapter)
1074 {
1075         int i;
1076
1077         if (!adapter->vsi_res)
1078                 return;
1079         for (i = 0; i < adapter->num_active_queues; i++) {
1080                 if (adapter->tx_rings[i])
1081                         kfree_rcu(adapter->tx_rings[i], rcu);
1082                 adapter->tx_rings[i] = NULL;
1083                 adapter->rx_rings[i] = NULL;
1084         }
1085 }
1086
1087 /**
1088  * i40evf_alloc_queues - Allocate memory for all rings
1089  * @adapter: board private structure to initialize
1090  *
1091  * We allocate one ring per queue at run-time since we don't know the
1092  * number of queues at compile-time.  The polling_netdev array is
1093  * intended for Multiqueue, but should work fine with a single queue.
1094  **/
1095 static int i40evf_alloc_queues(struct i40evf_adapter *adapter)
1096 {
1097         int i;
1098
1099         for (i = 0; i < adapter->num_active_queues; i++) {
1100                 struct i40e_ring *tx_ring;
1101                 struct i40e_ring *rx_ring;
1102
1103                 tx_ring = kzalloc(sizeof(*tx_ring) * 2, GFP_KERNEL);
1104                 if (!tx_ring)
1105                         goto err_out;
1106
1107                 tx_ring->queue_index = i;
1108                 tx_ring->netdev = adapter->netdev;
1109                 tx_ring->dev = &adapter->pdev->dev;
1110                 tx_ring->count = adapter->tx_desc_count;
1111                 adapter->tx_rings[i] = tx_ring;
1112
1113                 rx_ring = &tx_ring[1];
1114                 rx_ring->queue_index = i;
1115                 rx_ring->netdev = adapter->netdev;
1116                 rx_ring->dev = &adapter->pdev->dev;
1117                 rx_ring->count = adapter->rx_desc_count;
1118                 adapter->rx_rings[i] = rx_ring;
1119         }
1120
1121         return 0;
1122
1123 err_out:
1124         i40evf_free_queues(adapter);
1125         return -ENOMEM;
1126 }
1127
1128 /**
1129  * i40evf_set_interrupt_capability - set MSI-X or FAIL if not supported
1130  * @adapter: board private structure to initialize
1131  *
1132  * Attempt to configure the interrupts using the best available
1133  * capabilities of the hardware and the kernel.
1134  **/
1135 static int i40evf_set_interrupt_capability(struct i40evf_adapter *adapter)
1136 {
1137         int vector, v_budget;
1138         int pairs = 0;
1139         int err = 0;
1140
1141         if (!adapter->vsi_res) {
1142                 err = -EIO;
1143                 goto out;
1144         }
1145         pairs = adapter->num_active_queues;
1146
1147         /* It's easy to be greedy for MSI-X vectors, but it really
1148          * doesn't do us much good if we have a lot more vectors
1149          * than CPU's.  So let's be conservative and only ask for
1150          * (roughly) twice the number of vectors as there are CPU's.
1151          */
1152         v_budget = min_t(int, pairs, (int)(num_online_cpus() * 2)) + NONQ_VECS;
1153         v_budget = min_t(int, v_budget, (int)adapter->vf_res->max_vectors);
1154
1155         adapter->msix_entries = kcalloc(v_budget,
1156                                         sizeof(struct msix_entry), GFP_KERNEL);
1157         if (!adapter->msix_entries) {
1158                 err = -ENOMEM;
1159                 goto out;
1160         }
1161
1162         for (vector = 0; vector < v_budget; vector++)
1163                 adapter->msix_entries[vector].entry = vector;
1164
1165         i40evf_acquire_msix_vectors(adapter, v_budget);
1166
1167 out:
1168         adapter->netdev->real_num_tx_queues = pairs;
1169         return err;
1170 }
1171
1172 /**
1173  * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors
1174  * @adapter: board private structure to initialize
1175  *
1176  * We allocate one q_vector per queue interrupt.  If allocation fails we
1177  * return -ENOMEM.
1178  **/
1179 static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
1180 {
1181         int q_idx, num_q_vectors;
1182         struct i40e_q_vector *q_vector;
1183
1184         num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1185
1186         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1187                 q_vector = kzalloc(sizeof(*q_vector), GFP_KERNEL);
1188                 if (!q_vector)
1189                         goto err_out;
1190                 q_vector->adapter = adapter;
1191                 q_vector->vsi = &adapter->vsi;
1192                 q_vector->v_idx = q_idx;
1193                 netif_napi_add(adapter->netdev, &q_vector->napi,
1194                                i40evf_napi_poll, NAPI_POLL_WEIGHT);
1195                 adapter->q_vector[q_idx] = q_vector;
1196         }
1197
1198         return 0;
1199
1200 err_out:
1201         while (q_idx) {
1202                 q_idx--;
1203                 q_vector = adapter->q_vector[q_idx];
1204                 netif_napi_del(&q_vector->napi);
1205                 kfree(q_vector);
1206                 adapter->q_vector[q_idx] = NULL;
1207         }
1208         return -ENOMEM;
1209 }
1210
1211 /**
1212  * i40evf_free_q_vectors - Free memory allocated for interrupt vectors
1213  * @adapter: board private structure to initialize
1214  *
1215  * This function frees the memory allocated to the q_vectors.  In addition if
1216  * NAPI is enabled it will delete any references to the NAPI struct prior
1217  * to freeing the q_vector.
1218  **/
1219 static void i40evf_free_q_vectors(struct i40evf_adapter *adapter)
1220 {
1221         int q_idx, num_q_vectors;
1222         int napi_vectors;
1223
1224         num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1225         napi_vectors = adapter->num_active_queues;
1226
1227         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1228                 struct i40e_q_vector *q_vector = adapter->q_vector[q_idx];
1229
1230                 adapter->q_vector[q_idx] = NULL;
1231                 if (q_idx < napi_vectors)
1232                         netif_napi_del(&q_vector->napi);
1233                 kfree(q_vector);
1234         }
1235 }
1236
1237 /**
1238  * i40evf_reset_interrupt_capability - Reset MSIX setup
1239  * @adapter: board private structure
1240  *
1241  **/
1242 void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
1243 {
1244         pci_disable_msix(adapter->pdev);
1245         kfree(adapter->msix_entries);
1246         adapter->msix_entries = NULL;
1247 }
1248
1249 /**
1250  * i40evf_init_interrupt_scheme - Determine if MSIX is supported and init
1251  * @adapter: board private structure to initialize
1252  *
1253  **/
1254 int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter)
1255 {
1256         int err;
1257
1258         err = i40evf_set_interrupt_capability(adapter);
1259         if (err) {
1260                 dev_err(&adapter->pdev->dev,
1261                         "Unable to setup interrupt capabilities\n");
1262                 goto err_set_interrupt;
1263         }
1264
1265         err = i40evf_alloc_q_vectors(adapter);
1266         if (err) {
1267                 dev_err(&adapter->pdev->dev,
1268                         "Unable to allocate memory for queue vectors\n");
1269                 goto err_alloc_q_vectors;
1270         }
1271
1272         err = i40evf_alloc_queues(adapter);
1273         if (err) {
1274                 dev_err(&adapter->pdev->dev,
1275                         "Unable to allocate memory for queues\n");
1276                 goto err_alloc_queues;
1277         }
1278
1279         dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
1280                  (adapter->num_active_queues > 1) ? "Enabled" : "Disabled",
1281                  adapter->num_active_queues);
1282
1283         return 0;
1284 err_alloc_queues:
1285         i40evf_free_q_vectors(adapter);
1286 err_alloc_q_vectors:
1287         i40evf_reset_interrupt_capability(adapter);
1288 err_set_interrupt:
1289         return err;
1290 }
1291
1292 /**
1293  * i40evf_watchdog_timer - Periodic call-back timer
1294  * @data: pointer to adapter disguised as unsigned long
1295  **/
1296 static void i40evf_watchdog_timer(unsigned long data)
1297 {
1298         struct i40evf_adapter *adapter = (struct i40evf_adapter *)data;
1299
1300         schedule_work(&adapter->watchdog_task);
1301         /* timer will be rescheduled in watchdog task */
1302 }
1303
1304 /**
1305  * i40evf_watchdog_task - Periodic call-back task
1306  * @work: pointer to work_struct
1307  **/
1308 static void i40evf_watchdog_task(struct work_struct *work)
1309 {
1310         struct i40evf_adapter *adapter = container_of(work,
1311                                                       struct i40evf_adapter,
1312                                                       watchdog_task);
1313         struct i40e_hw *hw = &adapter->hw;
1314         uint32_t rstat_val;
1315
1316         if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
1317                 goto restart_watchdog;
1318
1319         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1320                 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1321                             I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1322                 if ((rstat_val == I40E_VFR_VFACTIVE) ||
1323                     (rstat_val == I40E_VFR_COMPLETED)) {
1324                         /* A chance for redemption! */
1325                         dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
1326                         adapter->state = __I40EVF_STARTUP;
1327                         adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1328                         schedule_delayed_work(&adapter->init_task, 10);
1329                         clear_bit(__I40EVF_IN_CRITICAL_TASK,
1330                                   &adapter->crit_section);
1331                         /* Don't reschedule the watchdog, since we've restarted
1332                          * the init task. When init_task contacts the PF and
1333                          * gets everything set up again, it'll restart the
1334                          * watchdog for us. Down, boy. Sit. Stay. Woof.
1335                          */
1336                         return;
1337                 }
1338                 adapter->aq_pending = 0;
1339                 adapter->aq_required = 0;
1340                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1341                 goto watchdog_done;
1342         }
1343
1344         if ((adapter->state < __I40EVF_DOWN) ||
1345             (adapter->flags & I40EVF_FLAG_RESET_PENDING))
1346                 goto watchdog_done;
1347
1348         /* check for reset */
1349         rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1350                     I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1351         if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) &&
1352             (rstat_val != I40E_VFR_VFACTIVE) &&
1353             (rstat_val != I40E_VFR_COMPLETED)) {
1354                 adapter->state = __I40EVF_RESETTING;
1355                 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1356                 dev_err(&adapter->pdev->dev, "Hardware reset detected\n");
1357                 schedule_work(&adapter->reset_task);
1358                 adapter->aq_pending = 0;
1359                 adapter->aq_required = 0;
1360                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1361                 goto watchdog_done;
1362         }
1363
1364         /* Process admin queue tasks. After init, everything gets done
1365          * here so we don't race on the admin queue.
1366          */
1367         if (adapter->aq_pending) {
1368                 if (!i40evf_asq_done(hw)) {
1369                         dev_dbg(&adapter->pdev->dev, "Admin queue timeout\n");
1370                         i40evf_send_api_ver(adapter);
1371                 }
1372                 goto watchdog_done;
1373         }
1374
1375         if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
1376                 i40evf_disable_queues(adapter);
1377                 goto watchdog_done;
1378         }
1379
1380         if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
1381                 i40evf_map_queues(adapter);
1382                 goto watchdog_done;
1383         }
1384
1385         if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
1386                 i40evf_add_ether_addrs(adapter);
1387                 goto watchdog_done;
1388         }
1389
1390         if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
1391                 i40evf_add_vlans(adapter);
1392                 goto watchdog_done;
1393         }
1394
1395         if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
1396                 i40evf_del_ether_addrs(adapter);
1397                 goto watchdog_done;
1398         }
1399
1400         if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
1401                 i40evf_del_vlans(adapter);
1402                 goto watchdog_done;
1403         }
1404
1405         if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
1406                 i40evf_configure_queues(adapter);
1407                 goto watchdog_done;
1408         }
1409
1410         if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
1411                 i40evf_enable_queues(adapter);
1412                 goto watchdog_done;
1413         }
1414
1415         if (adapter->state == __I40EVF_RUNNING)
1416                 i40evf_request_stats(adapter);
1417 watchdog_done:
1418         if (adapter->state == __I40EVF_RUNNING) {
1419                 i40evf_irq_enable_queues(adapter, ~0);
1420                 i40evf_fire_sw_int(adapter, 0xFF);
1421         } else {
1422                 i40evf_fire_sw_int(adapter, 0x1);
1423         }
1424
1425         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1426 restart_watchdog:
1427         if (adapter->state == __I40EVF_REMOVE)
1428                 return;
1429         if (adapter->aq_required)
1430                 mod_timer(&adapter->watchdog_timer,
1431                           jiffies + msecs_to_jiffies(20));
1432         else
1433                 mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
1434         schedule_work(&adapter->adminq_task);
1435 }
1436
1437 /**
1438  * next_queue - increment to next available tx queue
1439  * @adapter: board private structure
1440  * @j: queue counter
1441  *
1442  * Helper function for RSS programming to increment through available
1443  * queus. Returns the next queue value.
1444  **/
1445 static int next_queue(struct i40evf_adapter *adapter, int j)
1446 {
1447         j += 1;
1448
1449         return j >= adapter->num_active_queues ? 0 : j;
1450 }
1451
1452 /**
1453  * i40evf_configure_rss - Prepare for RSS if used
1454  * @adapter: board private structure
1455  **/
1456 static void i40evf_configure_rss(struct i40evf_adapter *adapter)
1457 {
1458         u32 rss_key[I40E_VFQF_HKEY_MAX_INDEX + 1];
1459         struct i40e_hw *hw = &adapter->hw;
1460         u32 lut = 0;
1461         int i, j;
1462         u64 hena;
1463
1464         /* No RSS for single queue. */
1465         if (adapter->num_active_queues == 1) {
1466                 wr32(hw, I40E_VFQF_HENA(0), 0);
1467                 wr32(hw, I40E_VFQF_HENA(1), 0);
1468                 return;
1469         }
1470
1471         /* Hash type is configured by the PF - we just supply the key */
1472         netdev_rss_key_fill(rss_key, sizeof(rss_key));
1473         for (i = 0; i <= I40E_VFQF_HKEY_MAX_INDEX; i++)
1474                 wr32(hw, I40E_VFQF_HKEY(i), rss_key[i]);
1475
1476         /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
1477         hena = I40E_DEFAULT_RSS_HENA;
1478         wr32(hw, I40E_VFQF_HENA(0), (u32)hena);
1479         wr32(hw, I40E_VFQF_HENA(1), (u32)(hena >> 32));
1480
1481         /* Populate the LUT with max no. of queues in round robin fashion */
1482         j = adapter->num_active_queues;
1483         for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++) {
1484                 j = next_queue(adapter, j);
1485                 lut = j;
1486                 j = next_queue(adapter, j);
1487                 lut |= j << 8;
1488                 j = next_queue(adapter, j);
1489                 lut |= j << 16;
1490                 j = next_queue(adapter, j);
1491                 lut |= j << 24;
1492                 wr32(hw, I40E_VFQF_HLUT(i), lut);
1493         }
1494         i40e_flush(hw);
1495 }
1496
1497 #define I40EVF_RESET_WAIT_MS 100
1498 #define I40EVF_RESET_WAIT_COUNT 200
1499 /**
1500  * i40evf_reset_task - Call-back task to handle hardware reset
1501  * @work: pointer to work_struct
1502  *
1503  * During reset we need to shut down and reinitialize the admin queue
1504  * before we can use it to communicate with the PF again. We also clear
1505  * and reinit the rings because that context is lost as well.
1506  **/
1507 static void i40evf_reset_task(struct work_struct *work)
1508 {
1509         struct i40evf_adapter *adapter = container_of(work,
1510                                                       struct i40evf_adapter,
1511                                                       reset_task);
1512         struct net_device *netdev = adapter->netdev;
1513         struct i40e_hw *hw = &adapter->hw;
1514         struct i40evf_mac_filter *f;
1515         uint32_t rstat_val;
1516         int i = 0, err;
1517
1518         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1519                                 &adapter->crit_section))
1520                 usleep_range(500, 1000);
1521
1522         if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) {
1523                 dev_info(&adapter->pdev->dev, "Requesting reset from PF\n");
1524                 i40evf_request_reset(adapter);
1525         }
1526
1527         /* poll until we see the reset actually happen */
1528         for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1529                 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1530                             I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1531                 if ((rstat_val != I40E_VFR_VFACTIVE) &&
1532                     (rstat_val != I40E_VFR_COMPLETED))
1533                         break;
1534                 msleep(I40EVF_RESET_WAIT_MS);
1535         }
1536         if (i == I40EVF_RESET_WAIT_COUNT) {
1537                 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1538                 goto continue_reset; /* act like the reset happened */
1539         }
1540
1541         /* wait until the reset is complete and the PF is responding to us */
1542         for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1543                 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1544                             I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1545                 if ((rstat_val == I40E_VFR_VFACTIVE) ||
1546                     (rstat_val == I40E_VFR_COMPLETED))
1547                         break;
1548                 msleep(I40EVF_RESET_WAIT_MS);
1549         }
1550         if (i == I40EVF_RESET_WAIT_COUNT) {
1551                 struct i40evf_mac_filter *f, *ftmp;
1552                 struct i40evf_vlan_filter *fv, *fvtmp;
1553
1554                 /* reset never finished */
1555                 dev_err(&adapter->pdev->dev, "Reset never finished (%x)\n",
1556                         rstat_val);
1557                 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
1558
1559                 if (netif_running(adapter->netdev)) {
1560                         set_bit(__I40E_DOWN, &adapter->vsi.state);
1561                         i40evf_irq_disable(adapter);
1562                         i40evf_napi_disable_all(adapter);
1563                         netif_tx_disable(netdev);
1564                         netif_tx_stop_all_queues(netdev);
1565                         netif_carrier_off(netdev);
1566                         i40evf_free_traffic_irqs(adapter);
1567                         i40evf_free_all_tx_resources(adapter);
1568                         i40evf_free_all_rx_resources(adapter);
1569                 }
1570
1571                 /* Delete all of the filters, both MAC and VLAN. */
1572                 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list,
1573                                          list) {
1574                         list_del(&f->list);
1575                         kfree(f);
1576                 }
1577                 list_for_each_entry_safe(fv, fvtmp, &adapter->vlan_filter_list,
1578                                          list) {
1579                         list_del(&fv->list);
1580                         kfree(fv);
1581                 }
1582
1583                 i40evf_free_misc_irq(adapter);
1584                 i40evf_reset_interrupt_capability(adapter);
1585                 i40evf_free_queues(adapter);
1586                 i40evf_free_q_vectors(adapter);
1587                 kfree(adapter->vf_res);
1588                 i40evf_shutdown_adminq(hw);
1589                 adapter->netdev->flags &= ~IFF_UP;
1590                 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1591                 return; /* Do not attempt to reinit. It's dead, Jim. */
1592         }
1593
1594 continue_reset:
1595         adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1596
1597         i40evf_irq_disable(adapter);
1598
1599         if (netif_running(adapter->netdev)) {
1600                 i40evf_napi_disable_all(adapter);
1601                 netif_tx_disable(netdev);
1602                 netif_tx_stop_all_queues(netdev);
1603                 netif_carrier_off(netdev);
1604         }
1605
1606         adapter->state = __I40EVF_RESETTING;
1607
1608         /* kill and reinit the admin queue */
1609         if (i40evf_shutdown_adminq(hw))
1610                 dev_warn(&adapter->pdev->dev, "Failed to shut down adminq\n");
1611         adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1612         err = i40evf_init_adminq(hw);
1613         if (err)
1614                 dev_info(&adapter->pdev->dev, "Failed to init adminq: %d\n",
1615                          err);
1616
1617         i40evf_map_queues(adapter);
1618
1619         /* re-add all MAC filters */
1620         list_for_each_entry(f, &adapter->mac_filter_list, list) {
1621                 f->add = true;
1622         }
1623         /* re-add all VLAN filters */
1624         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
1625                 f->add = true;
1626         }
1627         adapter->aq_required = I40EVF_FLAG_AQ_ADD_MAC_FILTER;
1628         adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
1629         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1630
1631         mod_timer(&adapter->watchdog_timer, jiffies + 2);
1632
1633         if (netif_running(adapter->netdev)) {
1634                 /* allocate transmit descriptors */
1635                 err = i40evf_setup_all_tx_resources(adapter);
1636                 if (err)
1637                         goto reset_err;
1638
1639                 /* allocate receive descriptors */
1640                 err = i40evf_setup_all_rx_resources(adapter);
1641                 if (err)
1642                         goto reset_err;
1643
1644                 i40evf_configure(adapter);
1645
1646                 err = i40evf_up_complete(adapter);
1647                 if (err)
1648                         goto reset_err;
1649
1650                 i40evf_irq_enable(adapter, true);
1651         }
1652         return;
1653 reset_err:
1654         dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
1655         i40evf_close(adapter->netdev);
1656 }
1657
1658 /**
1659  * i40evf_adminq_task - worker thread to clean the admin queue
1660  * @work: pointer to work_struct containing our data
1661  **/
1662 static void i40evf_adminq_task(struct work_struct *work)
1663 {
1664         struct i40evf_adapter *adapter =
1665                 container_of(work, struct i40evf_adapter, adminq_task);
1666         struct i40e_hw *hw = &adapter->hw;
1667         struct i40e_arq_event_info event;
1668         struct i40e_virtchnl_msg *v_msg;
1669         i40e_status ret;
1670         u32 val, oldval;
1671         u16 pending;
1672
1673         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
1674                 goto out;
1675
1676         event.buf_len = I40EVF_MAX_AQ_BUF_SIZE;
1677         event.msg_buf = kzalloc(event.buf_len, GFP_KERNEL);
1678         if (!event.msg_buf)
1679                 goto out;
1680
1681         v_msg = (struct i40e_virtchnl_msg *)&event.desc;
1682         do {
1683                 ret = i40evf_clean_arq_element(hw, &event, &pending);
1684                 if (ret || !v_msg->v_opcode)
1685                         break; /* No event to process or error cleaning ARQ */
1686
1687                 i40evf_virtchnl_completion(adapter, v_msg->v_opcode,
1688                                            v_msg->v_retval, event.msg_buf,
1689                                            event.msg_len);
1690                 if (pending != 0)
1691                         memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
1692         } while (pending);
1693
1694         /* check for error indications */
1695         val = rd32(hw, hw->aq.arq.len);
1696         oldval = val;
1697         if (val & I40E_VF_ARQLEN_ARQVFE_MASK) {
1698                 dev_info(&adapter->pdev->dev, "ARQ VF Error detected\n");
1699                 val &= ~I40E_VF_ARQLEN_ARQVFE_MASK;
1700         }
1701         if (val & I40E_VF_ARQLEN_ARQOVFL_MASK) {
1702                 dev_info(&adapter->pdev->dev, "ARQ Overflow Error detected\n");
1703                 val &= ~I40E_VF_ARQLEN_ARQOVFL_MASK;
1704         }
1705         if (val & I40E_VF_ARQLEN_ARQCRIT_MASK) {
1706                 dev_info(&adapter->pdev->dev, "ARQ Critical Error detected\n");
1707                 val &= ~I40E_VF_ARQLEN_ARQCRIT_MASK;
1708         }
1709         if (oldval != val)
1710                 wr32(hw, hw->aq.arq.len, val);
1711
1712         val = rd32(hw, hw->aq.asq.len);
1713         oldval = val;
1714         if (val & I40E_VF_ATQLEN_ATQVFE_MASK) {
1715                 dev_info(&adapter->pdev->dev, "ASQ VF Error detected\n");
1716                 val &= ~I40E_VF_ATQLEN_ATQVFE_MASK;
1717         }
1718         if (val & I40E_VF_ATQLEN_ATQOVFL_MASK) {
1719                 dev_info(&adapter->pdev->dev, "ASQ Overflow Error detected\n");
1720                 val &= ~I40E_VF_ATQLEN_ATQOVFL_MASK;
1721         }
1722         if (val & I40E_VF_ATQLEN_ATQCRIT_MASK) {
1723                 dev_info(&adapter->pdev->dev, "ASQ Critical Error detected\n");
1724                 val &= ~I40E_VF_ATQLEN_ATQCRIT_MASK;
1725         }
1726         if (oldval != val)
1727                 wr32(hw, hw->aq.asq.len, val);
1728
1729         kfree(event.msg_buf);
1730 out:
1731         /* re-enable Admin queue interrupt cause */
1732         i40evf_misc_irq_enable(adapter);
1733 }
1734
1735 /**
1736  * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
1737  * @adapter: board private structure
1738  *
1739  * Free all transmit software resources
1740  **/
1741 void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
1742 {
1743         int i;
1744
1745         for (i = 0; i < adapter->num_active_queues; i++)
1746                 if (adapter->tx_rings[i]->desc)
1747                         i40evf_free_tx_resources(adapter->tx_rings[i]);
1748 }
1749
1750 /**
1751  * i40evf_setup_all_tx_resources - allocate all queues Tx resources
1752  * @adapter: board private structure
1753  *
1754  * If this function returns with an error, then it's possible one or
1755  * more of the rings is populated (while the rest are not).  It is the
1756  * callers duty to clean those orphaned rings.
1757  *
1758  * Return 0 on success, negative on failure
1759  **/
1760 static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter)
1761 {
1762         int i, err = 0;
1763
1764         for (i = 0; i < adapter->num_active_queues; i++) {
1765                 adapter->tx_rings[i]->count = adapter->tx_desc_count;
1766                 err = i40evf_setup_tx_descriptors(adapter->tx_rings[i]);
1767                 if (!err)
1768                         continue;
1769                 dev_err(&adapter->pdev->dev,
1770                         "%s: Allocation for Tx Queue %u failed\n",
1771                         __func__, i);
1772                 break;
1773         }
1774
1775         return err;
1776 }
1777
1778 /**
1779  * i40evf_setup_all_rx_resources - allocate all queues Rx resources
1780  * @adapter: board private structure
1781  *
1782  * If this function returns with an error, then it's possible one or
1783  * more of the rings is populated (while the rest are not).  It is the
1784  * callers duty to clean those orphaned rings.
1785  *
1786  * Return 0 on success, negative on failure
1787  **/
1788 static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter)
1789 {
1790         int i, err = 0;
1791
1792         for (i = 0; i < adapter->num_active_queues; i++) {
1793                 adapter->rx_rings[i]->count = adapter->rx_desc_count;
1794                 err = i40evf_setup_rx_descriptors(adapter->rx_rings[i]);
1795                 if (!err)
1796                         continue;
1797                 dev_err(&adapter->pdev->dev,
1798                         "%s: Allocation for Rx Queue %u failed\n",
1799                         __func__, i);
1800                 break;
1801         }
1802         return err;
1803 }
1804
1805 /**
1806  * i40evf_free_all_rx_resources - Free Rx Resources for All Queues
1807  * @adapter: board private structure
1808  *
1809  * Free all receive software resources
1810  **/
1811 void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
1812 {
1813         int i;
1814
1815         for (i = 0; i < adapter->num_active_queues; i++)
1816                 if (adapter->rx_rings[i]->desc)
1817                         i40evf_free_rx_resources(adapter->rx_rings[i]);
1818 }
1819
1820 /**
1821  * i40evf_open - Called when a network interface is made active
1822  * @netdev: network interface device structure
1823  *
1824  * Returns 0 on success, negative value on failure
1825  *
1826  * The open entry point is called when a network interface is made
1827  * active by the system (IFF_UP).  At this point all resources needed
1828  * for transmit and receive operations are allocated, the interrupt
1829  * handler is registered with the OS, the watchdog timer is started,
1830  * and the stack is notified that the interface is ready.
1831  **/
1832 static int i40evf_open(struct net_device *netdev)
1833 {
1834         struct i40evf_adapter *adapter = netdev_priv(netdev);
1835         int err;
1836
1837         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1838                 dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
1839                 return -EIO;
1840         }
1841         if (adapter->state != __I40EVF_DOWN || adapter->aq_required)
1842                 return -EBUSY;
1843
1844         /* allocate transmit descriptors */
1845         err = i40evf_setup_all_tx_resources(adapter);
1846         if (err)
1847                 goto err_setup_tx;
1848
1849         /* allocate receive descriptors */
1850         err = i40evf_setup_all_rx_resources(adapter);
1851         if (err)
1852                 goto err_setup_rx;
1853
1854         /* clear any pending interrupts, may auto mask */
1855         err = i40evf_request_traffic_irqs(adapter, netdev->name);
1856         if (err)
1857                 goto err_req_irq;
1858
1859         i40evf_configure(adapter);
1860
1861         err = i40evf_up_complete(adapter);
1862         if (err)
1863                 goto err_req_irq;
1864
1865         i40evf_irq_enable(adapter, true);
1866
1867         return 0;
1868
1869 err_req_irq:
1870         i40evf_down(adapter);
1871         i40evf_free_traffic_irqs(adapter);
1872 err_setup_rx:
1873         i40evf_free_all_rx_resources(adapter);
1874 err_setup_tx:
1875         i40evf_free_all_tx_resources(adapter);
1876
1877         return err;
1878 }
1879
1880 /**
1881  * i40evf_close - Disables a network interface
1882  * @netdev: network interface device structure
1883  *
1884  * Returns 0, this is not allowed to fail
1885  *
1886  * The close entry point is called when an interface is de-activated
1887  * by the OS.  The hardware is still under the drivers control, but
1888  * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
1889  * are freed, along with all transmit and receive resources.
1890  **/
1891 static int i40evf_close(struct net_device *netdev)
1892 {
1893         struct i40evf_adapter *adapter = netdev_priv(netdev);
1894
1895         if (adapter->state <= __I40EVF_DOWN)
1896                 return 0;
1897
1898
1899         set_bit(__I40E_DOWN, &adapter->vsi.state);
1900
1901         i40evf_down(adapter);
1902         adapter->state = __I40EVF_DOWN;
1903         i40evf_free_traffic_irqs(adapter);
1904
1905         return 0;
1906 }
1907
1908 /**
1909  * i40evf_get_stats - Get System Network Statistics
1910  * @netdev: network interface device structure
1911  *
1912  * Returns the address of the device statistics structure.
1913  * The statistics are actually updated from the timer callback.
1914  **/
1915 static struct net_device_stats *i40evf_get_stats(struct net_device *netdev)
1916 {
1917         struct i40evf_adapter *adapter = netdev_priv(netdev);
1918
1919         /* only return the current stats */
1920         return &adapter->net_stats;
1921 }
1922
1923 /**
1924  * i40evf_reinit_locked - Software reinit
1925  * @adapter: board private structure
1926  *
1927  * Reinititalizes the ring structures in response to a software configuration
1928  * change. Roughly the same as close followed by open, but skips releasing
1929  * and reallocating the interrupts.
1930  **/
1931 void i40evf_reinit_locked(struct i40evf_adapter *adapter)
1932 {
1933         struct net_device *netdev = adapter->netdev;
1934         int err;
1935
1936         WARN_ON(in_interrupt());
1937
1938         i40evf_down(adapter);
1939
1940         /* allocate transmit descriptors */
1941         err = i40evf_setup_all_tx_resources(adapter);
1942         if (err)
1943                 goto err_reinit;
1944
1945         /* allocate receive descriptors */
1946         err = i40evf_setup_all_rx_resources(adapter);
1947         if (err)
1948                 goto err_reinit;
1949
1950         i40evf_configure(adapter);
1951
1952         err = i40evf_up_complete(adapter);
1953         if (err)
1954                 goto err_reinit;
1955
1956         i40evf_irq_enable(adapter, true);
1957         return;
1958
1959 err_reinit:
1960         dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
1961         i40evf_close(netdev);
1962 }
1963
1964 /**
1965  * i40evf_change_mtu - Change the Maximum Transfer Unit
1966  * @netdev: network interface device structure
1967  * @new_mtu: new value for maximum frame size
1968  *
1969  * Returns 0 on success, negative on failure
1970  **/
1971 static int i40evf_change_mtu(struct net_device *netdev, int new_mtu)
1972 {
1973         struct i40evf_adapter *adapter = netdev_priv(netdev);
1974         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
1975
1976         if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
1977                 return -EINVAL;
1978
1979         /* must set new MTU before calling down or up */
1980         netdev->mtu = new_mtu;
1981         i40evf_reinit_locked(adapter);
1982         return 0;
1983 }
1984
1985 static const struct net_device_ops i40evf_netdev_ops = {
1986         .ndo_open               = i40evf_open,
1987         .ndo_stop               = i40evf_close,
1988         .ndo_start_xmit         = i40evf_xmit_frame,
1989         .ndo_get_stats          = i40evf_get_stats,
1990         .ndo_set_rx_mode        = i40evf_set_rx_mode,
1991         .ndo_validate_addr      = eth_validate_addr,
1992         .ndo_set_mac_address    = i40evf_set_mac,
1993         .ndo_change_mtu         = i40evf_change_mtu,
1994         .ndo_tx_timeout         = i40evf_tx_timeout,
1995         .ndo_vlan_rx_add_vid    = i40evf_vlan_rx_add_vid,
1996         .ndo_vlan_rx_kill_vid   = i40evf_vlan_rx_kill_vid,
1997 };
1998
1999 /**
2000  * i40evf_check_reset_complete - check that VF reset is complete
2001  * @hw: pointer to hw struct
2002  *
2003  * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
2004  **/
2005 static int i40evf_check_reset_complete(struct i40e_hw *hw)
2006 {
2007         u32 rstat;
2008         int i;
2009
2010         for (i = 0; i < 100; i++) {
2011                 rstat = rd32(hw, I40E_VFGEN_RSTAT) &
2012                             I40E_VFGEN_RSTAT_VFR_STATE_MASK;
2013                 if ((rstat == I40E_VFR_VFACTIVE) ||
2014                     (rstat == I40E_VFR_COMPLETED))
2015                         return 0;
2016                 usleep_range(10, 20);
2017         }
2018         return -EBUSY;
2019 }
2020
2021 /**
2022  * i40evf_init_task - worker thread to perform delayed initialization
2023  * @work: pointer to work_struct containing our data
2024  *
2025  * This task completes the work that was begun in probe. Due to the nature
2026  * of VF-PF communications, we may need to wait tens of milliseconds to get
2027  * responses back from the PF. Rather than busy-wait in probe and bog down the
2028  * whole system, we'll do it in a task so we can sleep.
2029  * This task only runs during driver init. Once we've established
2030  * communications with the PF driver and set up our netdev, the watchdog
2031  * takes over.
2032  **/
2033 static void i40evf_init_task(struct work_struct *work)
2034 {
2035         struct i40evf_adapter *adapter = container_of(work,
2036                                                       struct i40evf_adapter,
2037                                                       init_task.work);
2038         struct net_device *netdev = adapter->netdev;
2039         struct i40evf_mac_filter *f;
2040         struct i40e_hw *hw = &adapter->hw;
2041         struct pci_dev *pdev = adapter->pdev;
2042         int i, err, bufsz;
2043
2044         switch (adapter->state) {
2045         case __I40EVF_STARTUP:
2046                 /* driver loaded, probe complete */
2047                 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
2048                 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
2049                 err = i40e_set_mac_type(hw);
2050                 if (err) {
2051                         dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
2052                                 err);
2053                 goto err;
2054                 }
2055                 err = i40evf_check_reset_complete(hw);
2056                 if (err) {
2057                         dev_info(&pdev->dev, "Device is still in reset (%d), retrying\n",
2058                                  err);
2059                         goto err;
2060                 }
2061                 hw->aq.num_arq_entries = I40EVF_AQ_LEN;
2062                 hw->aq.num_asq_entries = I40EVF_AQ_LEN;
2063                 hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2064                 hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2065
2066                 err = i40evf_init_adminq(hw);
2067                 if (err) {
2068                         dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
2069                                 err);
2070                         goto err;
2071                 }
2072                 err = i40evf_send_api_ver(adapter);
2073                 if (err) {
2074                         dev_err(&pdev->dev, "Unable to send to PF (%d)\n", err);
2075                         i40evf_shutdown_adminq(hw);
2076                         goto err;
2077                 }
2078                 adapter->state = __I40EVF_INIT_VERSION_CHECK;
2079                 goto restart;
2080         case __I40EVF_INIT_VERSION_CHECK:
2081                 if (!i40evf_asq_done(hw)) {
2082                         dev_err(&pdev->dev, "Admin queue command never completed\n");
2083                         i40evf_shutdown_adminq(hw);
2084                         adapter->state = __I40EVF_STARTUP;
2085                         goto err;
2086                 }
2087
2088                 /* aq msg sent, awaiting reply */
2089                 err = i40evf_verify_api_ver(adapter);
2090                 if (err) {
2091                         if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
2092                                 err = i40evf_send_api_ver(adapter);
2093                         goto err;
2094                 }
2095                 err = i40evf_send_vf_config_msg(adapter);
2096                 if (err) {
2097                         dev_err(&pdev->dev, "Unable to send config request (%d)\n",
2098                                 err);
2099                         goto err;
2100                 }
2101                 adapter->state = __I40EVF_INIT_GET_RESOURCES;
2102                 goto restart;
2103         case __I40EVF_INIT_GET_RESOURCES:
2104                 /* aq msg sent, awaiting reply */
2105                 if (!adapter->vf_res) {
2106                         bufsz = sizeof(struct i40e_virtchnl_vf_resource) +
2107                                 (I40E_MAX_VF_VSI *
2108                                  sizeof(struct i40e_virtchnl_vsi_resource));
2109                         adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
2110                         if (!adapter->vf_res)
2111                                 goto err;
2112                 }
2113                 err = i40evf_get_vf_config(adapter);
2114                 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK) {
2115                         err = i40evf_send_vf_config_msg(adapter);
2116                         goto err;
2117                 }
2118                 if (err) {
2119                         dev_err(&pdev->dev, "Unable to get VF config (%d)\n",
2120                                 err);
2121                         goto err_alloc;
2122                 }
2123                 adapter->state = __I40EVF_INIT_SW;
2124                 break;
2125         default:
2126                 goto err_alloc;
2127         }
2128         /* got VF config message back from PF, now we can parse it */
2129         for (i = 0; i < adapter->vf_res->num_vsis; i++) {
2130                 if (adapter->vf_res->vsi_res[i].vsi_type == I40E_VSI_SRIOV)
2131                         adapter->vsi_res = &adapter->vf_res->vsi_res[i];
2132         }
2133         if (!adapter->vsi_res) {
2134                 dev_err(&pdev->dev, "No LAN VSI found\n");
2135                 goto err_alloc;
2136         }
2137
2138         adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
2139
2140         netdev->netdev_ops = &i40evf_netdev_ops;
2141         i40evf_set_ethtool_ops(netdev);
2142         netdev->watchdog_timeo = 5 * HZ;
2143         netdev->features |= NETIF_F_HIGHDMA |
2144                             NETIF_F_SG |
2145                             NETIF_F_IP_CSUM |
2146                             NETIF_F_SCTP_CSUM |
2147                             NETIF_F_IPV6_CSUM |
2148                             NETIF_F_TSO |
2149                             NETIF_F_TSO6 |
2150                             NETIF_F_RXCSUM |
2151                             NETIF_F_GRO;
2152
2153         if (adapter->vf_res->vf_offload_flags
2154             & I40E_VIRTCHNL_VF_OFFLOAD_VLAN) {
2155                 netdev->vlan_features = netdev->features;
2156                 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX |
2157                                     NETIF_F_HW_VLAN_CTAG_RX |
2158                                     NETIF_F_HW_VLAN_CTAG_FILTER;
2159         }
2160
2161         /* copy netdev features into list of user selectable features */
2162         netdev->hw_features |= netdev->features;
2163         netdev->hw_features &= ~NETIF_F_RXCSUM;
2164
2165         if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
2166                 dev_info(&pdev->dev, "Invalid MAC address %pM, using random\n",
2167                          adapter->hw.mac.addr);
2168                 random_ether_addr(adapter->hw.mac.addr);
2169         }
2170         ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
2171         ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
2172
2173         f = kzalloc(sizeof(*f), GFP_ATOMIC);
2174         if (!f)
2175                 goto err_sw_init;
2176
2177         ether_addr_copy(f->macaddr, adapter->hw.mac.addr);
2178         f->add = true;
2179         adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
2180
2181         list_add(&f->list, &adapter->mac_filter_list);
2182
2183         init_timer(&adapter->watchdog_timer);
2184         adapter->watchdog_timer.function = &i40evf_watchdog_timer;
2185         adapter->watchdog_timer.data = (unsigned long)adapter;
2186         mod_timer(&adapter->watchdog_timer, jiffies + 1);
2187
2188         adapter->num_active_queues = min_t(int,
2189                                            adapter->vsi_res->num_queue_pairs,
2190                                            (int)(num_online_cpus()));
2191         adapter->tx_desc_count = I40EVF_DEFAULT_TXD;
2192         adapter->rx_desc_count = I40EVF_DEFAULT_RXD;
2193         err = i40evf_init_interrupt_scheme(adapter);
2194         if (err)
2195                 goto err_sw_init;
2196         i40evf_map_rings_to_vectors(adapter);
2197         i40evf_configure_rss(adapter);
2198         err = i40evf_request_misc_irq(adapter);
2199         if (err)
2200                 goto err_sw_init;
2201
2202         netif_carrier_off(netdev);
2203
2204         adapter->vsi.id = adapter->vsi_res->vsi_id;
2205         adapter->vsi.seid = adapter->vsi_res->vsi_id; /* dummy */
2206         adapter->vsi.back = adapter;
2207         adapter->vsi.base_vector = 1;
2208         adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
2209         adapter->vsi.rx_itr_setting = (I40E_ITR_DYNAMIC |
2210                                        ITR_REG_TO_USEC(I40E_ITR_RX_DEF));
2211         adapter->vsi.tx_itr_setting = (I40E_ITR_DYNAMIC |
2212                                        ITR_REG_TO_USEC(I40E_ITR_TX_DEF));
2213         adapter->vsi.netdev = adapter->netdev;
2214
2215         if (!adapter->netdev_registered) {
2216                 err = register_netdev(netdev);
2217                 if (err)
2218                         goto err_register;
2219         }
2220
2221         adapter->netdev_registered = true;
2222
2223         netif_tx_stop_all_queues(netdev);
2224
2225         dev_info(&pdev->dev, "MAC address: %pM\n", adapter->hw.mac.addr);
2226         if (netdev->features & NETIF_F_GRO)
2227                 dev_info(&pdev->dev, "GRO is enabled\n");
2228
2229         dev_info(&pdev->dev, "%s\n", i40evf_driver_string);
2230         adapter->state = __I40EVF_DOWN;
2231         set_bit(__I40E_DOWN, &adapter->vsi.state);
2232         i40evf_misc_irq_enable(adapter);
2233         return;
2234 restart:
2235         schedule_delayed_work(&adapter->init_task,
2236                               msecs_to_jiffies(50));
2237         return;
2238
2239 err_register:
2240         i40evf_free_misc_irq(adapter);
2241 err_sw_init:
2242         i40evf_reset_interrupt_capability(adapter);
2243 err_alloc:
2244         kfree(adapter->vf_res);
2245         adapter->vf_res = NULL;
2246 err:
2247         /* Things went into the weeds, so try again later */
2248         if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
2249                 dev_err(&pdev->dev, "Failed to communicate with PF; giving up\n");
2250                 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
2251                 return; /* do not reschedule */
2252         }
2253         schedule_delayed_work(&adapter->init_task, HZ * 3);
2254 }
2255
2256 /**
2257  * i40evf_shutdown - Shutdown the device in preparation for a reboot
2258  * @pdev: pci device structure
2259  **/
2260 static void i40evf_shutdown(struct pci_dev *pdev)
2261 {
2262         struct net_device *netdev = pci_get_drvdata(pdev);
2263         struct i40evf_adapter *adapter = netdev_priv(netdev);
2264
2265         netif_device_detach(netdev);
2266
2267         if (netif_running(netdev))
2268                 i40evf_close(netdev);
2269
2270         /* Prevent the watchdog from running. */
2271         adapter->state = __I40EVF_REMOVE;
2272         adapter->aq_required = 0;
2273         adapter->aq_pending = 0;
2274
2275 #ifdef CONFIG_PM
2276         pci_save_state(pdev);
2277
2278 #endif
2279         pci_disable_device(pdev);
2280 }
2281
2282 /**
2283  * i40evf_probe - Device Initialization Routine
2284  * @pdev: PCI device information struct
2285  * @ent: entry in i40evf_pci_tbl
2286  *
2287  * Returns 0 on success, negative on failure
2288  *
2289  * i40evf_probe initializes an adapter identified by a pci_dev structure.
2290  * The OS initialization, configuring of the adapter private structure,
2291  * and a hardware reset occur.
2292  **/
2293 static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2294 {
2295         struct net_device *netdev;
2296         struct i40evf_adapter *adapter = NULL;
2297         struct i40e_hw *hw = NULL;
2298         int err;
2299
2300         err = pci_enable_device(pdev);
2301         if (err)
2302                 return err;
2303
2304         err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
2305         if (err) {
2306                 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2307                 if (err) {
2308                         dev_err(&pdev->dev,
2309                                 "DMA configuration failed: 0x%x\n", err);
2310                         goto err_dma;
2311                 }
2312         }
2313
2314         err = pci_request_regions(pdev, i40evf_driver_name);
2315         if (err) {
2316                 dev_err(&pdev->dev,
2317                         "pci_request_regions failed 0x%x\n", err);
2318                 goto err_pci_reg;
2319         }
2320
2321         pci_enable_pcie_error_reporting(pdev);
2322
2323         pci_set_master(pdev);
2324
2325         netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter),
2326                                    MAX_TX_QUEUES);
2327         if (!netdev) {
2328                 err = -ENOMEM;
2329                 goto err_alloc_etherdev;
2330         }
2331
2332         SET_NETDEV_DEV(netdev, &pdev->dev);
2333
2334         pci_set_drvdata(pdev, netdev);
2335         adapter = netdev_priv(netdev);
2336
2337         adapter->netdev = netdev;
2338         adapter->pdev = pdev;
2339
2340         hw = &adapter->hw;
2341         hw->back = adapter;
2342
2343         adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
2344         adapter->state = __I40EVF_STARTUP;
2345
2346         /* Call save state here because it relies on the adapter struct. */
2347         pci_save_state(pdev);
2348
2349         hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
2350                               pci_resource_len(pdev, 0));
2351         if (!hw->hw_addr) {
2352                 err = -EIO;
2353                 goto err_ioremap;
2354         }
2355         hw->vendor_id = pdev->vendor;
2356         hw->device_id = pdev->device;
2357         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2358         hw->subsystem_vendor_id = pdev->subsystem_vendor;
2359         hw->subsystem_device_id = pdev->subsystem_device;
2360         hw->bus.device = PCI_SLOT(pdev->devfn);
2361         hw->bus.func = PCI_FUNC(pdev->devfn);
2362
2363         INIT_LIST_HEAD(&adapter->mac_filter_list);
2364         INIT_LIST_HEAD(&adapter->vlan_filter_list);
2365
2366         INIT_WORK(&adapter->reset_task, i40evf_reset_task);
2367         INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
2368         INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
2369         INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
2370         schedule_delayed_work(&adapter->init_task, 10);
2371
2372         return 0;
2373
2374 err_ioremap:
2375         free_netdev(netdev);
2376 err_alloc_etherdev:
2377         pci_release_regions(pdev);
2378 err_pci_reg:
2379 err_dma:
2380         pci_disable_device(pdev);
2381         return err;
2382 }
2383
2384 #ifdef CONFIG_PM
2385 /**
2386  * i40evf_suspend - Power management suspend routine
2387  * @pdev: PCI device information struct
2388  * @state: unused
2389  *
2390  * Called when the system (VM) is entering sleep/suspend.
2391  **/
2392 static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
2393 {
2394         struct net_device *netdev = pci_get_drvdata(pdev);
2395         struct i40evf_adapter *adapter = netdev_priv(netdev);
2396         int retval = 0;
2397
2398         netif_device_detach(netdev);
2399
2400         if (netif_running(netdev)) {
2401                 rtnl_lock();
2402                 i40evf_down(adapter);
2403                 rtnl_unlock();
2404         }
2405         i40evf_free_misc_irq(adapter);
2406         i40evf_reset_interrupt_capability(adapter);
2407
2408         retval = pci_save_state(pdev);
2409         if (retval)
2410                 return retval;
2411
2412         pci_disable_device(pdev);
2413
2414         return 0;
2415 }
2416
2417 /**
2418  * i40evf_resume - Power management resume routine
2419  * @pdev: PCI device information struct
2420  *
2421  * Called when the system (VM) is resumed from sleep/suspend.
2422  **/
2423 static int i40evf_resume(struct pci_dev *pdev)
2424 {
2425         struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
2426         struct net_device *netdev = adapter->netdev;
2427         u32 err;
2428
2429         pci_set_power_state(pdev, PCI_D0);
2430         pci_restore_state(pdev);
2431         /* pci_restore_state clears dev->state_saved so call
2432          * pci_save_state to restore it.
2433          */
2434         pci_save_state(pdev);
2435
2436         err = pci_enable_device_mem(pdev);
2437         if (err) {
2438                 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
2439                 return err;
2440         }
2441         pci_set_master(pdev);
2442
2443         rtnl_lock();
2444         err = i40evf_set_interrupt_capability(adapter);
2445         if (err) {
2446                 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
2447                 return err;
2448         }
2449         err = i40evf_request_misc_irq(adapter);
2450         rtnl_unlock();
2451         if (err) {
2452                 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
2453                 return err;
2454         }
2455
2456         schedule_work(&adapter->reset_task);
2457
2458         netif_device_attach(netdev);
2459
2460         return err;
2461 }
2462
2463 #endif /* CONFIG_PM */
2464 /**
2465  * i40evf_remove - Device Removal Routine
2466  * @pdev: PCI device information struct
2467  *
2468  * i40evf_remove is called by the PCI subsystem to alert the driver
2469  * that it should release a PCI device.  The could be caused by a
2470  * Hot-Plug event, or because the driver is going to be removed from
2471  * memory.
2472  **/
2473 static void i40evf_remove(struct pci_dev *pdev)
2474 {
2475         struct net_device *netdev = pci_get_drvdata(pdev);
2476         struct i40evf_adapter *adapter = netdev_priv(netdev);
2477         struct i40evf_mac_filter *f, *ftmp;
2478         struct i40e_hw *hw = &adapter->hw;
2479
2480         cancel_delayed_work_sync(&adapter->init_task);
2481         cancel_work_sync(&adapter->reset_task);
2482
2483         if (adapter->netdev_registered) {
2484                 unregister_netdev(netdev);
2485                 adapter->netdev_registered = false;
2486         }
2487
2488         /* Shut down all the garbage mashers on the detention level */
2489         adapter->state = __I40EVF_REMOVE;
2490         adapter->aq_required = 0;
2491         adapter->aq_pending = 0;
2492         i40evf_request_reset(adapter);
2493         msleep(20);
2494         /* If the FW isn't responding, kick it once, but only once. */
2495         if (!i40evf_asq_done(hw)) {
2496                 i40evf_request_reset(adapter);
2497                 msleep(20);
2498         }
2499
2500         if (adapter->msix_entries) {
2501                 i40evf_misc_irq_disable(adapter);
2502                 i40evf_free_misc_irq(adapter);
2503                 i40evf_reset_interrupt_capability(adapter);
2504                 i40evf_free_q_vectors(adapter);
2505         }
2506
2507         if (adapter->watchdog_timer.function)
2508                 del_timer_sync(&adapter->watchdog_timer);
2509
2510         flush_scheduled_work();
2511
2512         if (hw->aq.asq.count)
2513                 i40evf_shutdown_adminq(hw);
2514
2515         iounmap(hw->hw_addr);
2516         pci_release_regions(pdev);
2517
2518         i40evf_free_all_tx_resources(adapter);
2519         i40evf_free_all_rx_resources(adapter);
2520         i40evf_free_queues(adapter);
2521         kfree(adapter->vf_res);
2522         /* If we got removed before an up/down sequence, we've got a filter
2523          * hanging out there that we need to get rid of.
2524          */
2525         list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
2526                 list_del(&f->list);
2527                 kfree(f);
2528         }
2529         list_for_each_entry_safe(f, ftmp, &adapter->vlan_filter_list, list) {
2530                 list_del(&f->list);
2531                 kfree(f);
2532         }
2533
2534         free_netdev(netdev);
2535
2536         pci_disable_pcie_error_reporting(pdev);
2537
2538         pci_disable_device(pdev);
2539 }
2540
2541 static struct pci_driver i40evf_driver = {
2542         .name     = i40evf_driver_name,
2543         .id_table = i40evf_pci_tbl,
2544         .probe    = i40evf_probe,
2545         .remove   = i40evf_remove,
2546 #ifdef CONFIG_PM
2547         .suspend  = i40evf_suspend,
2548         .resume   = i40evf_resume,
2549 #endif
2550         .shutdown = i40evf_shutdown,
2551 };
2552
2553 /**
2554  * i40e_init_module - Driver Registration Routine
2555  *
2556  * i40e_init_module is the first routine called when the driver is
2557  * loaded. All it does is register with the PCI subsystem.
2558  **/
2559 static int __init i40evf_init_module(void)
2560 {
2561         int ret;
2562
2563         pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
2564                 i40evf_driver_version);
2565
2566         pr_info("%s\n", i40evf_copyright);
2567
2568         ret = pci_register_driver(&i40evf_driver);
2569         return ret;
2570 }
2571
2572 module_init(i40evf_init_module);
2573
2574 /**
2575  * i40e_exit_module - Driver Exit Cleanup Routine
2576  *
2577  * i40e_exit_module is called just before the driver is removed
2578  * from memory.
2579  **/
2580 static void __exit i40evf_exit_module(void)
2581 {
2582         pci_unregister_driver(&i40evf_driver);
2583 }
2584
2585 module_exit(i40evf_exit_module);
2586
2587 /* i40evf_main.c */