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 "1.3.21"
  38 const char i40evf_driver_version[] = DRV_VERSION;
  39 static const char i40evf_copyright[] =
  40         "Copyright (c) 2013 - 2015 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         {PCI_VDEVICE(INTEL, I40E_DEV_ID_X722_VF), 0},
  53         /* required last entry */
  54         {0, }
  55 };
  56
  57 MODULE_DEVICE_TABLE(pci, i40evf_pci_tbl);
  58
  59 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
  60 MODULE_DESCRIPTION("Intel(R) XL710 X710 Virtual Function Network Driver");
  61 MODULE_LICENSE("GPL");
  62 MODULE_VERSION(DRV_VERSION);
  63
  64 /**
  65  * i40evf_allocate_dma_mem_d - OS specific memory alloc for shared code
  66  * @hw:   pointer to the HW structure
  67  * @mem:  ptr to mem struct to fill out
  68  * @size: size of memory requested
  69  * @alignment: what to align the allocation to
  70  **/
  71 i40e_status i40evf_allocate_dma_mem_d(struct i40e_hw *hw,
  72                                       struct i40e_dma_mem *mem,
  73                                       u64 size, u32 alignment)
  74 {
  75         struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
  76
  77         if (!mem)
  78                 return I40E_ERR_PARAM;
  79
  80         mem->size = ALIGN(size, alignment);
  81         mem->va = dma_alloc_coherent(&adapter->pdev->dev, mem->size,
  82                                      (dma_addr_t *)&mem->pa, GFP_KERNEL);
  83         if (mem->va)
  84                 return 0;
  85         else
  86                 return I40E_ERR_NO_MEMORY;
  87 }
  88
  89 /**
  90  * i40evf_free_dma_mem_d - OS specific memory free for shared code
  91  * @hw:   pointer to the HW structure
  92  * @mem:  ptr to mem struct to free
  93  **/
  94 i40e_status i40evf_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem)
  95 {
  96         struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
  97
  98         if (!mem || !mem->va)
  99                 return I40E_ERR_PARAM;
 100         dma_free_coherent(&adapter->pdev->dev, mem->size,
 101                           mem->va, (dma_addr_t)mem->pa);
 102         return 0;
 103 }
 104
 105 /**
 106  * i40evf_allocate_virt_mem_d - OS specific memory alloc for shared code
 107  * @hw:   pointer to the HW structure
 108  * @mem:  ptr to mem struct to fill out
 109  * @size: size of memory requested
 110  **/
 111 i40e_status i40evf_allocate_virt_mem_d(struct i40e_hw *hw,
 112                                        struct i40e_virt_mem *mem, u32 size)
 113 {
 114         if (!mem)
 115                 return I40E_ERR_PARAM;
 116
 117         mem->size = size;
 118         mem->va = kzalloc(size, GFP_KERNEL);
 119
 120         if (mem->va)
 121                 return 0;
 122         else
 123                 return I40E_ERR_NO_MEMORY;
 124 }
 125
 126 /**
 127  * i40evf_free_virt_mem_d - OS specific memory free for shared code
 128  * @hw:   pointer to the HW structure
 129  * @mem:  ptr to mem struct to free
 130  **/
 131 i40e_status i40evf_free_virt_mem_d(struct i40e_hw *hw,
 132                                    struct i40e_virt_mem *mem)
 133 {
 134         if (!mem)
 135                 return I40E_ERR_PARAM;
 136
 137         /* it's ok to kfree a NULL pointer */
 138         kfree(mem->va);
 139
 140         return 0;
 141 }
 142
 143 /**
 144  * i40evf_debug_d - OS dependent version of debug printing
 145  * @hw:  pointer to the HW structure
 146  * @mask: debug level mask
 147  * @fmt_str: printf-type format description
 148  **/
 149 void i40evf_debug_d(void *hw, u32 mask, char *fmt_str, ...)
 150 {
 151         char buf[512];
 152         va_list argptr;
 153
 154         if (!(mask & ((struct i40e_hw *)hw)->debug_mask))
 155                 return;
 156
 157         va_start(argptr, fmt_str);
 158         vsnprintf(buf, sizeof(buf), fmt_str, argptr);
 159         va_end(argptr);
 160
 161         /* the debug string is already formatted with a newline */
 162         pr_info("%s", buf);
 163 }
 164
 165 /**
 166  * i40evf_tx_timeout - Respond to a Tx Hang
 167  * @netdev: network interface device structure
 168  **/
 169 static void i40evf_tx_timeout(struct net_device *netdev)
 170 {
 171         struct i40evf_adapter *adapter = netdev_priv(netdev);
 172
 173         adapter->tx_timeout_count++;
 174         if (!(adapter->flags & (I40EVF_FLAG_RESET_PENDING |
 175                                 I40EVF_FLAG_RESET_NEEDED))) {
 176                 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
 177                 schedule_work(&adapter->reset_task);
 178         }
 179 }
 180
 181 /**
 182  * i40evf_misc_irq_disable - Mask off interrupt generation on the NIC
 183  * @adapter: board private structure
 184  **/
 185 static void i40evf_misc_irq_disable(struct i40evf_adapter *adapter)
 186 {
 187         struct i40e_hw *hw = &adapter->hw;
 188
 189         wr32(hw, I40E_VFINT_DYN_CTL01, 0);
 190
 191         /* read flush */
 192         rd32(hw, I40E_VFGEN_RSTAT);
 193
 194         synchronize_irq(adapter->msix_entries[0].vector);
 195 }
 196
 197 /**
 198  * i40evf_misc_irq_enable - Enable default interrupt generation settings
 199  * @adapter: board private structure
 200  **/
 201 static void i40evf_misc_irq_enable(struct i40evf_adapter *adapter)
 202 {
 203         struct i40e_hw *hw = &adapter->hw;
 204
 205         wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK |
 206                                        I40E_VFINT_DYN_CTL01_ITR_INDX_MASK);
 207         wr32(hw, I40E_VFINT_ICR0_ENA1, I40E_VFINT_ICR0_ENA1_ADMINQ_MASK);
 208
 209         /* read flush */
 210         rd32(hw, I40E_VFGEN_RSTAT);
 211 }
 212
 213 /**
 214  * i40evf_irq_disable - Mask off interrupt generation on the NIC
 215  * @adapter: board private structure
 216  **/
 217 static void i40evf_irq_disable(struct i40evf_adapter *adapter)
 218 {
 219         int i;
 220         struct i40e_hw *hw = &adapter->hw;
 221
 222         if (!adapter->msix_entries)
 223                 return;
 224
 225         for (i = 1; i < adapter->num_msix_vectors; i++) {
 226                 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), 0);
 227                 synchronize_irq(adapter->msix_entries[i].vector);
 228         }
 229         /* read flush */
 230         rd32(hw, I40E_VFGEN_RSTAT);
 231 }
 232
 233 /**
 234  * i40evf_irq_enable_queues - Enable interrupt for specified queues
 235  * @adapter: board private structure
 236  * @mask: bitmap of queues to enable
 237  **/
 238 void i40evf_irq_enable_queues(struct i40evf_adapter *adapter, u32 mask)
 239 {
 240         struct i40e_hw *hw = &adapter->hw;
 241         int i;
 242
 243         for (i = 1; i < adapter->num_msix_vectors; i++) {
 244                 if (mask & BIT(i - 1)) {
 245                         wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1),
 246                              I40E_VFINT_DYN_CTLN1_INTENA_MASK |
 247                              I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
 248                              I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK);
 249                 }
 250         }
 251 }
 252
 253 /**
 254  * i40evf_fire_sw_int - Generate SW interrupt for specified vectors
 255  * @adapter: board private structure
 256  * @mask: bitmap of vectors to trigger
 257  **/
 258 static void i40evf_fire_sw_int(struct i40evf_adapter *adapter, u32 mask)
 259 {
 260         struct i40e_hw *hw = &adapter->hw;
 261         int i;
 262         uint32_t dyn_ctl;
 263
 264         if (mask & 1) {
 265                 dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTL01);
 266                 dyn_ctl |= I40E_VFINT_DYN_CTLN1_SWINT_TRIG_MASK |
 267                            I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
 268                            I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK;
 269                 wr32(hw, I40E_VFINT_DYN_CTL01, dyn_ctl);
 270         }
 271         for (i = 1; i < adapter->num_msix_vectors; i++) {
 272                 if (mask & BIT(i)) {
 273                         dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTLN1(i - 1));
 274                         dyn_ctl |= I40E_VFINT_DYN_CTLN1_SWINT_TRIG_MASK |
 275                                    I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
 276                                    I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK;
 277                         wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), dyn_ctl);
 278                 }
 279         }
 280 }
 281
 282 /**
 283  * i40evf_irq_enable - Enable default interrupt generation settings
 284  * @adapter: board private structure
 285  **/
 286 void i40evf_irq_enable(struct i40evf_adapter *adapter, bool flush)
 287 {
 288         struct i40e_hw *hw = &adapter->hw;
 289
 290         i40evf_misc_irq_enable(adapter);
 291         i40evf_irq_enable_queues(adapter, ~0);
 292
 293         if (flush)
 294                 rd32(hw, I40E_VFGEN_RSTAT);
 295 }
 296
 297 /**
 298  * i40evf_msix_aq - Interrupt handler for vector 0
 299  * @irq: interrupt number
 300  * @data: pointer to netdev
 301  **/
 302 static irqreturn_t i40evf_msix_aq(int irq, void *data)
 303 {
 304         struct net_device *netdev = data;
 305         struct i40evf_adapter *adapter = netdev_priv(netdev);
 306         struct i40e_hw *hw = &adapter->hw;
 307         u32 val;
 308         u32 ena_mask;
 309
 310         /* handle non-queue interrupts */
 311         val = rd32(hw, I40E_VFINT_ICR01);
 312         ena_mask = rd32(hw, I40E_VFINT_ICR0_ENA1);
 313
 314
 315         val = rd32(hw, I40E_VFINT_DYN_CTL01);
 316         val = val | I40E_VFINT_DYN_CTL01_CLEARPBA_MASK;
 317         wr32(hw, I40E_VFINT_DYN_CTL01, val);
 318
 319         /* schedule work on the private workqueue */
 320         schedule_work(&adapter->adminq_task);
 321
 322         return IRQ_HANDLED;
 323 }
 324
 325 /**
 326  * i40evf_msix_clean_rings - MSIX mode Interrupt Handler
 327  * @irq: interrupt number
 328  * @data: pointer to a q_vector
 329  **/
 330 static irqreturn_t i40evf_msix_clean_rings(int irq, void *data)
 331 {
 332         struct i40e_q_vector *q_vector = data;
 333
 334         if (!q_vector->tx.ring && !q_vector->rx.ring)
 335                 return IRQ_HANDLED;
 336
 337         napi_schedule(&q_vector->napi);
 338
 339         return IRQ_HANDLED;
 340 }
 341
 342 /**
 343  * i40evf_map_vector_to_rxq - associate irqs with rx queues
 344  * @adapter: board private structure
 345  * @v_idx: interrupt number
 346  * @r_idx: queue number
 347  **/
 348 static void
 349 i40evf_map_vector_to_rxq(struct i40evf_adapter *adapter, int v_idx, int r_idx)
 350 {
 351         struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
 352         struct i40e_ring *rx_ring = adapter->rx_rings[r_idx];
 353
 354         rx_ring->q_vector = q_vector;
 355         rx_ring->next = q_vector->rx.ring;
 356         rx_ring->vsi = &adapter->vsi;
 357         q_vector->rx.ring = rx_ring;
 358         q_vector->rx.count++;
 359         q_vector->rx.latency_range = I40E_LOW_LATENCY;
 360 }
 361
 362 /**
 363  * i40evf_map_vector_to_txq - associate irqs with tx queues
 364  * @adapter: board private structure
 365  * @v_idx: interrupt number
 366  * @t_idx: queue number
 367  **/
 368 static void
 369 i40evf_map_vector_to_txq(struct i40evf_adapter *adapter, int v_idx, int t_idx)
 370 {
 371         struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
 372         struct i40e_ring *tx_ring = adapter->tx_rings[t_idx];
 373
 374         tx_ring->q_vector = q_vector;
 375         tx_ring->next = q_vector->tx.ring;
 376         tx_ring->vsi = &adapter->vsi;
 377         q_vector->tx.ring = tx_ring;
 378         q_vector->tx.count++;
 379         q_vector->tx.latency_range = I40E_LOW_LATENCY;
 380         q_vector->num_ringpairs++;
 381         q_vector->ring_mask |= BIT(t_idx);
 382 }
 383
 384 /**
 385  * i40evf_map_rings_to_vectors - Maps descriptor rings to vectors
 386  * @adapter: board private structure to initialize
 387  *
 388  * This function maps descriptor rings to the queue-specific vectors
 389  * we were allotted through the MSI-X enabling code.  Ideally, we'd have
 390  * one vector per ring/queue, but on a constrained vector budget, we
 391  * group the rings as "efficiently" as possible.  You would add new
 392  * mapping configurations in here.
 393  **/
 394 static int i40evf_map_rings_to_vectors(struct i40evf_adapter *adapter)
 395 {
 396         int q_vectors;
 397         int v_start = 0;
 398         int rxr_idx = 0, txr_idx = 0;
 399         int rxr_remaining = adapter->num_active_queues;
 400         int txr_remaining = adapter->num_active_queues;
 401         int i, j;
 402         int rqpv, tqpv;
 403         int err = 0;
 404
 405         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 406
 407         /* The ideal configuration...
 408          * We have enough vectors to map one per queue.
 409          */
 410         if (q_vectors >= (rxr_remaining * 2)) {
 411                 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
 412                         i40evf_map_vector_to_rxq(adapter, v_start, rxr_idx);
 413
 414                 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
 415                         i40evf_map_vector_to_txq(adapter, v_start, txr_idx);
 416                 goto out;
 417         }
 418
 419         /* If we don't have enough vectors for a 1-to-1
 420          * mapping, we'll have to group them so there are
 421          * multiple queues per vector.
 422          * Re-adjusting *qpv takes care of the remainder.
 423          */
 424         for (i = v_start; i < q_vectors; i++) {
 425                 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
 426                 for (j = 0; j < rqpv; j++) {
 427                         i40evf_map_vector_to_rxq(adapter, i, rxr_idx);
 428                         rxr_idx++;
 429                         rxr_remaining--;
 430                 }
 431         }
 432         for (i = v_start; i < q_vectors; i++) {
 433                 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
 434                 for (j = 0; j < tqpv; j++) {
 435                         i40evf_map_vector_to_txq(adapter, i, txr_idx);
 436                         txr_idx++;
 437                         txr_remaining--;
 438                 }
 439         }
 440
 441 out:
 442         adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
 443
 444         return err;
 445 }
 446
 447 #ifdef CONFIG_NET_POLL_CONTROLLER
 448 /**
 449  * i40evf_netpoll - A Polling 'interrupt' handler
 450  * @netdev: network interface device structure
 451  *
 452  * This is used by netconsole to send skbs without having to re-enable
 453  * interrupts.  It's not called while the normal interrupt routine is executing.
 454  **/
 455 static void i40evf_netpoll(struct net_device *netdev)
 456 {
 457         struct i40evf_adapter *adapter = netdev_priv(netdev);
 458         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 459         int i;
 460
 461         /* if interface is down do nothing */
 462         if (test_bit(__I40E_DOWN, &adapter->vsi.state))
 463                 return;
 464
 465         for (i = 0; i < q_vectors; i++)
 466                 i40evf_msix_clean_rings(0, adapter->q_vector[i]);
 467 }
 468
 469 #endif
 470 /**
 471  * i40evf_request_traffic_irqs - Initialize MSI-X interrupts
 472  * @adapter: board private structure
 473  *
 474  * Allocates MSI-X vectors for tx and rx handling, and requests
 475  * interrupts from the kernel.
 476  **/
 477 static int
 478 i40evf_request_traffic_irqs(struct i40evf_adapter *adapter, char *basename)
 479 {
 480         int vector, err, q_vectors;
 481         int rx_int_idx = 0, tx_int_idx = 0;
 482
 483         i40evf_irq_disable(adapter);
 484         /* Decrement for Other and TCP Timer vectors */
 485         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 486
 487         for (vector = 0; vector < q_vectors; vector++) {
 488                 struct i40e_q_vector *q_vector = adapter->q_vector[vector];
 489
 490                 if (q_vector->tx.ring && q_vector->rx.ring) {
 491                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 492                                  "i40evf-%s-%s-%d", basename,
 493                                  "TxRx", rx_int_idx++);
 494                         tx_int_idx++;
 495                 } else if (q_vector->rx.ring) {
 496                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 497                                  "i40evf-%s-%s-%d", basename,
 498                                  "rx", rx_int_idx++);
 499                 } else if (q_vector->tx.ring) {
 500                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 501                                  "i40evf-%s-%s-%d", basename,
 502                                  "tx", tx_int_idx++);
 503                 } else {
 504                         /* skip this unused q_vector */
 505                         continue;
 506                 }
 507                 err = request_irq(
 508                         adapter->msix_entries[vector + NONQ_VECS].vector,
 509                         i40evf_msix_clean_rings,
 510                         0,
 511                         q_vector->name,
 512                         q_vector);
 513                 if (err) {
 514                         dev_info(&adapter->pdev->dev,
 515                                  "Request_irq failed, error: %d\n", err);
 516                         goto free_queue_irqs;
 517                 }
 518                 /* assign the mask for this irq */
 519                 irq_set_affinity_hint(
 520                         adapter->msix_entries[vector + NONQ_VECS].vector,
 521                         q_vector->affinity_mask);
 522         }
 523
 524         return 0;
 525
 526 free_queue_irqs:
 527         while (vector) {
 528                 vector--;
 529                 irq_set_affinity_hint(
 530                         adapter->msix_entries[vector + NONQ_VECS].vector,
 531                         NULL);
 532                 free_irq(adapter->msix_entries[vector + NONQ_VECS].vector,
 533                          adapter->q_vector[vector]);
 534         }
 535         return err;
 536 }
 537
 538 /**
 539  * i40evf_request_misc_irq - Initialize MSI-X interrupts
 540  * @adapter: board private structure
 541  *
 542  * Allocates MSI-X vector 0 and requests interrupts from the kernel. This
 543  * vector is only for the admin queue, and stays active even when the netdev
 544  * is closed.
 545  **/
 546 static int i40evf_request_misc_irq(struct i40evf_adapter *adapter)
 547 {
 548         struct net_device *netdev = adapter->netdev;
 549         int err;
 550
 551         snprintf(adapter->misc_vector_name,
 552                  sizeof(adapter->misc_vector_name) - 1, "i40evf-%s:mbx",
 553                  dev_name(&adapter->pdev->dev));
 554         err = request_irq(adapter->msix_entries[0].vector,
 555                           &i40evf_msix_aq, 0,
 556                           adapter->misc_vector_name, netdev);
 557         if (err) {
 558                 dev_err(&adapter->pdev->dev,
 559                         "request_irq for %s failed: %d\n",
 560                         adapter->misc_vector_name, err);
 561                 free_irq(adapter->msix_entries[0].vector, netdev);
 562         }
 563         return err;
 564 }
 565
 566 /**
 567  * i40evf_free_traffic_irqs - Free MSI-X interrupts
 568  * @adapter: board private structure
 569  *
 570  * Frees all MSI-X vectors other than 0.
 571  **/
 572 static void i40evf_free_traffic_irqs(struct i40evf_adapter *adapter)
 573 {
 574         int i;
 575         int q_vectors;
 576
 577         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 578
 579         for (i = 0; i < q_vectors; i++) {
 580                 irq_set_affinity_hint(adapter->msix_entries[i+1].vector,
 581                                       NULL);
 582                 free_irq(adapter->msix_entries[i+1].vector,
 583                          adapter->q_vector[i]);
 584         }
 585 }
 586
 587 /**
 588  * i40evf_free_misc_irq - Free MSI-X miscellaneous vector
 589  * @adapter: board private structure
 590  *
 591  * Frees MSI-X vector 0.
 592  **/
 593 static void i40evf_free_misc_irq(struct i40evf_adapter *adapter)
 594 {
 595         struct net_device *netdev = adapter->netdev;
 596
 597         free_irq(adapter->msix_entries[0].vector, netdev);
 598 }
 599
 600 /**
 601  * i40evf_configure_tx - Configure Transmit Unit after Reset
 602  * @adapter: board private structure
 603  *
 604  * Configure the Tx unit of the MAC after a reset.
 605  **/
 606 static void i40evf_configure_tx(struct i40evf_adapter *adapter)
 607 {
 608         struct i40e_hw *hw = &adapter->hw;
 609         int i;
 610
 611         for (i = 0; i < adapter->num_active_queues; i++)
 612                 adapter->tx_rings[i]->tail = hw->hw_addr + I40E_QTX_TAIL1(i);
 613 }
 614
 615 /**
 616  * i40evf_configure_rx - Configure Receive Unit after Reset
 617  * @adapter: board private structure
 618  *
 619  * Configure the Rx unit of the MAC after a reset.
 620  **/
 621 static void i40evf_configure_rx(struct i40evf_adapter *adapter)
 622 {
 623         struct i40e_hw *hw = &adapter->hw;
 624         struct net_device *netdev = adapter->netdev;
 625         int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
 626         int i;
 627         int rx_buf_len;
 628
 629
 630         adapter->flags &= ~I40EVF_FLAG_RX_PS_CAPABLE;
 631         adapter->flags |= I40EVF_FLAG_RX_1BUF_CAPABLE;
 632
 633         /* Decide whether to use packet split mode or not */
 634         if (netdev->mtu > ETH_DATA_LEN) {
 635                 if (adapter->flags & I40EVF_FLAG_RX_PS_CAPABLE)
 636                         adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
 637                 else
 638                         adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
 639         } else {
 640                 if (adapter->flags & I40EVF_FLAG_RX_1BUF_CAPABLE)
 641                         adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
 642                 else
 643                         adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
 644         }
 645
 646         /* Set the RX buffer length according to the mode */
 647         if (adapter->flags & I40EVF_FLAG_RX_PS_ENABLED) {
 648                 rx_buf_len = I40E_RX_HDR_SIZE;
 649         } else {
 650                 if (netdev->mtu <= ETH_DATA_LEN)
 651                         rx_buf_len = I40EVF_RXBUFFER_2048;
 652                 else
 653                         rx_buf_len = ALIGN(max_frame, 1024);
 654         }
 655
 656         for (i = 0; i < adapter->num_active_queues; i++) {
 657                 adapter->rx_rings[i]->tail = hw->hw_addr + I40E_QRX_TAIL1(i);
 658                 adapter->rx_rings[i]->rx_buf_len = rx_buf_len;
 659         }
 660 }
 661
 662 /**
 663  * i40evf_find_vlan - Search filter list for specific vlan filter
 664  * @adapter: board private structure
 665  * @vlan: vlan tag
 666  *
 667  * Returns ptr to the filter object or NULL
 668  **/
 669 static struct
 670 i40evf_vlan_filter *i40evf_find_vlan(struct i40evf_adapter *adapter, u16 vlan)
 671 {
 672         struct i40evf_vlan_filter *f;
 673
 674         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
 675                 if (vlan == f->vlan)
 676                         return f;
 677         }
 678         return NULL;
 679 }
 680
 681 /**
 682  * i40evf_add_vlan - Add a vlan filter to the list
 683  * @adapter: board private structure
 684  * @vlan: VLAN tag
 685  *
 686  * Returns ptr to the filter object or NULL when no memory available.
 687  **/
 688 static struct
 689 i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan)
 690 {
 691         struct i40evf_vlan_filter *f = NULL;
 692         int count = 50;
 693
 694         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 695                                 &adapter->crit_section)) {
 696                 udelay(1);
 697                 if (--count == 0)
 698                         goto out;
 699         }
 700
 701         f = i40evf_find_vlan(adapter, vlan);
 702         if (!f) {
 703                 f = kzalloc(sizeof(*f), GFP_ATOMIC);
 704                 if (!f)
 705                         goto clearout;
 706
 707                 f->vlan = vlan;
 708
 709                 INIT_LIST_HEAD(&f->list);
 710                 list_add(&f->list, &adapter->vlan_filter_list);
 711                 f->add = true;
 712                 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
 713         }
 714
 715 clearout:
 716         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 717 out:
 718         return f;
 719 }
 720
 721 /**
 722  * i40evf_del_vlan - Remove a vlan filter from the list
 723  * @adapter: board private structure
 724  * @vlan: VLAN tag
 725  **/
 726 static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan)
 727 {
 728         struct i40evf_vlan_filter *f;
 729         int count = 50;
 730
 731         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 732                                 &adapter->crit_section)) {
 733                 udelay(1);
 734                 if (--count == 0)
 735                         return;
 736         }
 737
 738         f = i40evf_find_vlan(adapter, vlan);
 739         if (f) {
 740                 f->remove = true;
 741                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
 742         }
 743         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 744 }
 745
 746 /**
 747  * i40evf_vlan_rx_add_vid - Add a VLAN filter to a device
 748  * @netdev: network device struct
 749  * @vid: VLAN tag
 750  **/
 751 static int i40evf_vlan_rx_add_vid(struct net_device *netdev,
 752                                   __always_unused __be16 proto, u16 vid)
 753 {
 754         struct i40evf_adapter *adapter = netdev_priv(netdev);
 755
 756         if (!VLAN_ALLOWED(adapter))
 757                 return -EIO;
 758         if (i40evf_add_vlan(adapter, vid) == NULL)
 759                 return -ENOMEM;
 760         return 0;
 761 }
 762
 763 /**
 764  * i40evf_vlan_rx_kill_vid - Remove a VLAN filter from a device
 765  * @netdev: network device struct
 766  * @vid: VLAN tag
 767  **/
 768 static int i40evf_vlan_rx_kill_vid(struct net_device *netdev,
 769                                    __always_unused __be16 proto, u16 vid)
 770 {
 771         struct i40evf_adapter *adapter = netdev_priv(netdev);
 772
 773         if (VLAN_ALLOWED(adapter)) {
 774                 i40evf_del_vlan(adapter, vid);
 775                 return 0;
 776         }
 777         return -EIO;
 778 }
 779
 780 /**
 781  * i40evf_find_filter - Search filter list for specific mac filter
 782  * @adapter: board private structure
 783  * @macaddr: the MAC address
 784  *
 785  * Returns ptr to the filter object or NULL
 786  **/
 787 static struct
 788 i40evf_mac_filter *i40evf_find_filter(struct i40evf_adapter *adapter,
 789                                       u8 *macaddr)
 790 {
 791         struct i40evf_mac_filter *f;
 792
 793         if (!macaddr)
 794                 return NULL;
 795
 796         list_for_each_entry(f, &adapter->mac_filter_list, list) {
 797                 if (ether_addr_equal(macaddr, f->macaddr))
 798                         return f;
 799         }
 800         return NULL;
 801 }
 802
 803 /**
 804  * i40e_add_filter - Add a mac filter to the filter list
 805  * @adapter: board private structure
 806  * @macaddr: the MAC address
 807  *
 808  * Returns ptr to the filter object or NULL when no memory available.
 809  **/
 810 static struct
 811 i40evf_mac_filter *i40evf_add_filter(struct i40evf_adapter *adapter,
 812                                      u8 *macaddr)
 813 {
 814         struct i40evf_mac_filter *f;
 815         int count = 50;
 816
 817         if (!macaddr)
 818                 return NULL;
 819
 820         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 821                                 &adapter->crit_section)) {
 822                 udelay(1);
 823                 if (--count == 0)
 824                         return NULL;
 825         }
 826
 827         f = i40evf_find_filter(adapter, macaddr);
 828         if (!f) {
 829                 f = kzalloc(sizeof(*f), GFP_ATOMIC);
 830                 if (!f) {
 831                         clear_bit(__I40EVF_IN_CRITICAL_TASK,
 832                                   &adapter->crit_section);
 833                         return NULL;
 834                 }
 835
 836                 ether_addr_copy(f->macaddr, macaddr);
 837
 838                 list_add(&f->list, &adapter->mac_filter_list);
 839                 f->add = true;
 840                 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
 841         }
 842
 843         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 844         return f;
 845 }
 846
 847 /**
 848  * i40evf_set_mac - NDO callback to set port mac address
 849  * @netdev: network interface device structure
 850  * @p: pointer to an address structure
 851  *
 852  * Returns 0 on success, negative on failure
 853  **/
 854 static int i40evf_set_mac(struct net_device *netdev, void *p)
 855 {
 856         struct i40evf_adapter *adapter = netdev_priv(netdev);
 857         struct i40e_hw *hw = &adapter->hw;
 858         struct i40evf_mac_filter *f;
 859         struct sockaddr *addr = p;
 860
 861         if (!is_valid_ether_addr(addr->sa_data))
 862                 return -EADDRNOTAVAIL;
 863
 864         if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
 865                 return 0;
 866
 867         if (adapter->flags & I40EVF_FLAG_ADDR_SET_BY_PF)
 868                 return -EPERM;
 869
 870         f = i40evf_find_filter(adapter, hw->mac.addr);
 871         if (f) {
 872                 f->remove = true;
 873                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
 874         }
 875
 876         f = i40evf_add_filter(adapter, addr->sa_data);
 877         if (f) {
 878                 ether_addr_copy(hw->mac.addr, addr->sa_data);
 879                 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
 880         }
 881
 882         return (f == NULL) ? -ENOMEM : 0;
 883 }
 884
 885 /**
 886  * i40evf_set_rx_mode - NDO callback to set the netdev filters
 887  * @netdev: network interface device structure
 888  **/
 889 static void i40evf_set_rx_mode(struct net_device *netdev)
 890 {
 891         struct i40evf_adapter *adapter = netdev_priv(netdev);
 892         struct i40evf_mac_filter *f, *ftmp;
 893         struct netdev_hw_addr *uca;
 894         struct netdev_hw_addr *mca;
 895         struct netdev_hw_addr *ha;
 896         int count = 50;
 897
 898         /* add addr if not already in the filter list */
 899         netdev_for_each_uc_addr(uca, netdev) {
 900                 i40evf_add_filter(adapter, uca->addr);
 901         }
 902         netdev_for_each_mc_addr(mca, netdev) {
 903                 i40evf_add_filter(adapter, mca->addr);
 904         }
 905
 906         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 907                                 &adapter->crit_section)) {
 908                 udelay(1);
 909                 if (--count == 0) {
 910                         dev_err(&adapter->pdev->dev,
 911                                 "Failed to get lock in %s\n", __func__);
 912                         return;
 913                 }
 914         }
 915         /* remove filter if not in netdev list */
 916         list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
 917                 netdev_for_each_mc_addr(mca, netdev)
 918                         if (ether_addr_equal(mca->addr, f->macaddr))
 919                                 goto bottom_of_search_loop;
 920
 921                 netdev_for_each_uc_addr(uca, netdev)
 922                         if (ether_addr_equal(uca->addr, f->macaddr))
 923                                 goto bottom_of_search_loop;
 924
 925                 for_each_dev_addr(netdev, ha)
 926                         if (ether_addr_equal(ha->addr, f->macaddr))
 927                                 goto bottom_of_search_loop;
 928
 929                 if (ether_addr_equal(f->macaddr, adapter->hw.mac.addr))
 930                         goto bottom_of_search_loop;
 931
 932                 /* f->macaddr wasn't found in uc, mc, or ha list so delete it */
 933                 f->remove = true;
 934                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
 935
 936 bottom_of_search_loop:
 937                 continue;
 938         }
 939         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 940 }
 941
 942 /**
 943  * i40evf_napi_enable_all - enable NAPI on all queue vectors
 944  * @adapter: board private structure
 945  **/
 946 static void i40evf_napi_enable_all(struct i40evf_adapter *adapter)
 947 {
 948         int q_idx;
 949         struct i40e_q_vector *q_vector;
 950         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 951
 952         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
 953                 struct napi_struct *napi;
 954
 955                 q_vector = adapter->q_vector[q_idx];
 956                 napi = &q_vector->napi;
 957                 napi_enable(napi);
 958         }
 959 }
 960
 961 /**
 962  * i40evf_napi_disable_all - disable NAPI on all queue vectors
 963  * @adapter: board private structure
 964  **/
 965 static void i40evf_napi_disable_all(struct i40evf_adapter *adapter)
 966 {
 967         int q_idx;
 968         struct i40e_q_vector *q_vector;
 969         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 970
 971         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
 972                 q_vector = adapter->q_vector[q_idx];
 973                 napi_disable(&q_vector->napi);
 974         }
 975 }
 976
 977 /**
 978  * i40evf_configure - set up transmit and receive data structures
 979  * @adapter: board private structure
 980  **/
 981 static void i40evf_configure(struct i40evf_adapter *adapter)
 982 {
 983         struct net_device *netdev = adapter->netdev;
 984         int i;
 985
 986         i40evf_set_rx_mode(netdev);
 987
 988         i40evf_configure_tx(adapter);
 989         i40evf_configure_rx(adapter);
 990         adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
 991
 992         for (i = 0; i < adapter->num_active_queues; i++) {
 993                 struct i40e_ring *ring = adapter->rx_rings[i];
 994
 995                 i40evf_alloc_rx_buffers_1buf(ring, ring->count);
 996                 ring->next_to_use = ring->count - 1;
 997                 writel(ring->next_to_use, ring->tail);
 998         }
 999 }
1000
1001 /**
1002  * i40evf_up_complete - Finish the last steps of bringing up a connection
1003  * @adapter: board private structure
1004  **/
1005 static int i40evf_up_complete(struct i40evf_adapter *adapter)
1006 {
1007         adapter->state = __I40EVF_RUNNING;
1008         clear_bit(__I40E_DOWN, &adapter->vsi.state);
1009
1010         i40evf_napi_enable_all(adapter);
1011
1012         adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES;
1013         mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
1014         return 0;
1015 }
1016
1017 /**
1018  * i40e_down - Shutdown the connection processing
1019  * @adapter: board private structure
1020  **/
1021 void i40evf_down(struct i40evf_adapter *adapter)
1022 {
1023         struct net_device *netdev = adapter->netdev;
1024         struct i40evf_mac_filter *f;
1025
1026         if (adapter->state == __I40EVF_DOWN)
1027                 return;
1028
1029         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1030                                 &adapter->crit_section))
1031                 usleep_range(500, 1000);
1032
1033         netif_carrier_off(netdev);
1034         netif_tx_disable(netdev);
1035         i40evf_napi_disable_all(adapter);
1036         i40evf_irq_disable(adapter);
1037
1038         /* remove all MAC filters */
1039         list_for_each_entry(f, &adapter->mac_filter_list, list) {
1040                 f->remove = true;
1041         }
1042         /* remove all VLAN filters */
1043         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
1044                 f->remove = true;
1045         }
1046         if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) &&
1047             adapter->state != __I40EVF_RESETTING) {
1048                 /* cancel any current operation */
1049                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1050                 /* Schedule operations to close down the HW. Don't wait
1051                  * here for this to complete. The watchdog is still running
1052                  * and it will take care of this.
1053                  */
1054                 adapter->aq_required = I40EVF_FLAG_AQ_DEL_MAC_FILTER;
1055                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
1056                 adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
1057         }
1058
1059         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1060 }
1061
1062 /**
1063  * i40evf_acquire_msix_vectors - Setup the MSIX capability
1064  * @adapter: board private structure
1065  * @vectors: number of vectors to request
1066  *
1067  * Work with the OS to set up the MSIX vectors needed.
1068  *
1069  * Returns 0 on success, negative on failure
1070  **/
1071 static int
1072 i40evf_acquire_msix_vectors(struct i40evf_adapter *adapter, int vectors)
1073 {
1074         int err, vector_threshold;
1075
1076         /* We'll want at least 3 (vector_threshold):
1077          * 0) Other (Admin Queue and link, mostly)
1078          * 1) TxQ[0] Cleanup
1079          * 2) RxQ[0] Cleanup
1080          */
1081         vector_threshold = MIN_MSIX_COUNT;
1082
1083         /* The more we get, the more we will assign to Tx/Rx Cleanup
1084          * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1085          * Right now, we simply care about how many we'll get; we'll
1086          * set them up later while requesting irq's.
1087          */
1088         err = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
1089                                     vector_threshold, vectors);
1090         if (err < 0) {
1091                 dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts\n");
1092                 kfree(adapter->msix_entries);
1093                 adapter->msix_entries = NULL;
1094                 return err;
1095         }
1096
1097         /* Adjust for only the vectors we'll use, which is minimum
1098          * of max_msix_q_vectors + NONQ_VECS, or the number of
1099          * vectors we were allocated.
1100          */
1101         adapter->num_msix_vectors = err;
1102         return 0;
1103 }
1104
1105 /**
1106  * i40evf_free_queues - Free memory for all rings
1107  * @adapter: board private structure to initialize
1108  *
1109  * Free all of the memory associated with queue pairs.
1110  **/
1111 static void i40evf_free_queues(struct i40evf_adapter *adapter)
1112 {
1113         int i;
1114
1115         if (!adapter->vsi_res)
1116                 return;
1117         for (i = 0; i < adapter->num_active_queues; i++) {
1118                 if (adapter->tx_rings[i])
1119                         kfree_rcu(adapter->tx_rings[i], rcu);
1120                 adapter->tx_rings[i] = NULL;
1121                 adapter->rx_rings[i] = NULL;
1122         }
1123 }
1124
1125 /**
1126  * i40evf_alloc_queues - Allocate memory for all rings
1127  * @adapter: board private structure to initialize
1128  *
1129  * We allocate one ring per queue at run-time since we don't know the
1130  * number of queues at compile-time.  The polling_netdev array is
1131  * intended for Multiqueue, but should work fine with a single queue.
1132  **/
1133 static int i40evf_alloc_queues(struct i40evf_adapter *adapter)
1134 {
1135         int i;
1136
1137         for (i = 0; i < adapter->num_active_queues; i++) {
1138                 struct i40e_ring *tx_ring;
1139                 struct i40e_ring *rx_ring;
1140
1141                 tx_ring = kzalloc(sizeof(*tx_ring) * 2, GFP_KERNEL);
1142                 if (!tx_ring)
1143                         goto err_out;
1144
1145                 tx_ring->queue_index = i;
1146                 tx_ring->netdev = adapter->netdev;
1147                 tx_ring->dev = &adapter->pdev->dev;
1148                 tx_ring->count = adapter->tx_desc_count;
1149                 if (adapter->flags & I40E_FLAG_WB_ON_ITR_CAPABLE)
1150                         tx_ring->flags |= I40E_TXR_FLAGS_WB_ON_ITR;
1151                 adapter->tx_rings[i] = tx_ring;
1152
1153                 rx_ring = &tx_ring[1];
1154                 rx_ring->queue_index = i;
1155                 rx_ring->netdev = adapter->netdev;
1156                 rx_ring->dev = &adapter->pdev->dev;
1157                 rx_ring->count = adapter->rx_desc_count;
1158                 adapter->rx_rings[i] = rx_ring;
1159         }
1160
1161         return 0;
1162
1163 err_out:
1164         i40evf_free_queues(adapter);
1165         return -ENOMEM;
1166 }
1167
1168 /**
1169  * i40evf_set_interrupt_capability - set MSI-X or FAIL if not supported
1170  * @adapter: board private structure to initialize
1171  *
1172  * Attempt to configure the interrupts using the best available
1173  * capabilities of the hardware and the kernel.
1174  **/
1175 static int i40evf_set_interrupt_capability(struct i40evf_adapter *adapter)
1176 {
1177         int vector, v_budget;
1178         int pairs = 0;
1179         int err = 0;
1180
1181         if (!adapter->vsi_res) {
1182                 err = -EIO;
1183                 goto out;
1184         }
1185         pairs = adapter->num_active_queues;
1186
1187         /* It's easy to be greedy for MSI-X vectors, but it really
1188          * doesn't do us much good if we have a lot more vectors
1189          * than CPU's.  So let's be conservative and only ask for
1190          * (roughly) twice the number of vectors as there are CPU's.
1191          */
1192         v_budget = min_t(int, pairs, (int)(num_online_cpus() * 2)) + NONQ_VECS;
1193         v_budget = min_t(int, v_budget, (int)adapter->vf_res->max_vectors);
1194
1195         adapter->msix_entries = kcalloc(v_budget,
1196                                         sizeof(struct msix_entry), GFP_KERNEL);
1197         if (!adapter->msix_entries) {
1198                 err = -ENOMEM;
1199                 goto out;
1200         }
1201
1202         for (vector = 0; vector < v_budget; vector++)
1203                 adapter->msix_entries[vector].entry = vector;
1204
1205         err = i40evf_acquire_msix_vectors(adapter, v_budget);
1206
1207 out:
1208         adapter->netdev->real_num_tx_queues = pairs;
1209         return err;
1210 }
1211
1212 /**
1213  * i40e_configure_rss_aq - Prepare for RSS using AQ commands
1214  * @vsi: vsi structure
1215  * @seed: RSS hash seed
1216  **/
1217 static void i40evf_configure_rss_aq(struct i40e_vsi *vsi, const u8 *seed)
1218 {
1219         struct i40e_aqc_get_set_rss_key_data rss_key;
1220         struct i40evf_adapter *adapter = vsi->back;
1221         struct i40e_hw *hw = &adapter->hw;
1222         int ret = 0, i;
1223         u8 *rss_lut;
1224
1225         if (!vsi->id)
1226                 return;
1227
1228         if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
1229                 /* bail because we already have a command pending */
1230                 dev_err(&adapter->pdev->dev, "Cannot confiure RSS, command %d pending\n",
1231                         adapter->current_op);
1232                 return;
1233         }
1234
1235         memset(&rss_key, 0, sizeof(rss_key));
1236         memcpy(&rss_key, seed, sizeof(rss_key));
1237
1238         rss_lut = kzalloc(((I40E_VFQF_HLUT_MAX_INDEX + 1) * 4), GFP_KERNEL);
1239         if (!rss_lut)
1240                 return;
1241
1242         /* Populate the LUT with max no. PF queues in round robin fashion */
1243         for (i = 0; i <= (I40E_VFQF_HLUT_MAX_INDEX * 4); i++)
1244                 rss_lut[i] = i % adapter->num_active_queues;
1245
1246         ret = i40evf_aq_set_rss_key(hw, vsi->id, &rss_key);
1247         if (ret) {
1248                 dev_err(&adapter->pdev->dev,
1249                         "Cannot set RSS key, err %s aq_err %s\n",
1250                         i40evf_stat_str(hw, ret),
1251                         i40evf_aq_str(hw, hw->aq.asq_last_status));
1252                 return;
1253         }
1254
1255         ret = i40evf_aq_set_rss_lut(hw, vsi->id, false, rss_lut,
1256                                     (I40E_VFQF_HLUT_MAX_INDEX + 1) * 4);
1257         if (ret)
1258                 dev_err(&adapter->pdev->dev,
1259                         "Cannot set RSS lut, err %s aq_err %s\n",
1260                         i40evf_stat_str(hw, ret),
1261                         i40evf_aq_str(hw, hw->aq.asq_last_status));
1262 }
1263
1264 /**
1265  * i40e_configure_rss_reg - Prepare for RSS if used
1266  * @adapter: board private structure
1267  * @seed: RSS hash seed
1268  **/
1269 static void i40evf_configure_rss_reg(struct i40evf_adapter *adapter,
1270                                      const u8 *seed)
1271 {
1272         struct i40e_hw *hw = &adapter->hw;
1273         u32 *seed_dw = (u32 *)seed;
1274         u32 cqueue = 0;
1275         u32 lut = 0;
1276         int i, j;
1277
1278         /* Fill out hash function seed */
1279         for (i = 0; i <= I40E_VFQF_HKEY_MAX_INDEX; i++)
1280                 wr32(hw, I40E_VFQF_HKEY(i), seed_dw[i]);
1281
1282         /* Populate the LUT with max no. PF queues in round robin fashion */
1283         for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++) {
1284                 lut = 0;
1285                 for (j = 0; j < 4; j++) {
1286                         if (cqueue == adapter->num_active_queues)
1287                                 cqueue = 0;
1288                         lut |= ((cqueue) << (8 * j));
1289                         cqueue++;
1290                 }
1291                 wr32(hw, I40E_VFQF_HLUT(i), lut);
1292         }
1293         i40e_flush(hw);
1294 }
1295
1296 /**
1297  * i40evf_configure_rss - Prepare for RSS
1298  * @adapter: board private structure
1299  **/
1300 static void i40evf_configure_rss(struct i40evf_adapter *adapter)
1301 {
1302         struct i40e_hw *hw = &adapter->hw;
1303         u8 seed[I40EVF_HKEY_ARRAY_SIZE];
1304         u64 hena;
1305
1306         netdev_rss_key_fill((void *)seed, I40EVF_HKEY_ARRAY_SIZE);
1307
1308         /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
1309         hena = I40E_DEFAULT_RSS_HENA;
1310         wr32(hw, I40E_VFQF_HENA(0), (u32)hena);
1311         wr32(hw, I40E_VFQF_HENA(1), (u32)(hena >> 32));
1312
1313         if (RSS_AQ(adapter))
1314                 i40evf_configure_rss_aq(&adapter->vsi, seed);
1315         else
1316                 i40evf_configure_rss_reg(adapter, seed);
1317 }
1318
1319 /**
1320  * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors
1321  * @adapter: board private structure to initialize
1322  *
1323  * We allocate one q_vector per queue interrupt.  If allocation fails we
1324  * return -ENOMEM.
1325  **/
1326 static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
1327 {
1328         int q_idx, num_q_vectors;
1329         struct i40e_q_vector *q_vector;
1330
1331         num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1332
1333         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1334                 q_vector = kzalloc(sizeof(*q_vector), GFP_KERNEL);
1335                 if (!q_vector)
1336                         goto err_out;
1337                 q_vector->adapter = adapter;
1338                 q_vector->vsi = &adapter->vsi;
1339                 q_vector->v_idx = q_idx;
1340                 netif_napi_add(adapter->netdev, &q_vector->napi,
1341                                i40evf_napi_poll, NAPI_POLL_WEIGHT);
1342                 adapter->q_vector[q_idx] = q_vector;
1343         }
1344
1345         return 0;
1346
1347 err_out:
1348         while (q_idx) {
1349                 q_idx--;
1350                 q_vector = adapter->q_vector[q_idx];
1351                 netif_napi_del(&q_vector->napi);
1352                 kfree(q_vector);
1353                 adapter->q_vector[q_idx] = NULL;
1354         }
1355         return -ENOMEM;
1356 }
1357
1358 /**
1359  * i40evf_free_q_vectors - Free memory allocated for interrupt vectors
1360  * @adapter: board private structure to initialize
1361  *
1362  * This function frees the memory allocated to the q_vectors.  In addition if
1363  * NAPI is enabled it will delete any references to the NAPI struct prior
1364  * to freeing the q_vector.
1365  **/
1366 static void i40evf_free_q_vectors(struct i40evf_adapter *adapter)
1367 {
1368         int q_idx, num_q_vectors;
1369         int napi_vectors;
1370
1371         num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1372         napi_vectors = adapter->num_active_queues;
1373
1374         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1375                 struct i40e_q_vector *q_vector = adapter->q_vector[q_idx];
1376
1377                 adapter->q_vector[q_idx] = NULL;
1378                 if (q_idx < napi_vectors)
1379                         netif_napi_del(&q_vector->napi);
1380                 kfree(q_vector);
1381         }
1382 }
1383
1384 /**
1385  * i40evf_reset_interrupt_capability - Reset MSIX setup
1386  * @adapter: board private structure
1387  *
1388  **/
1389 void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
1390 {
1391         pci_disable_msix(adapter->pdev);
1392         kfree(adapter->msix_entries);
1393         adapter->msix_entries = NULL;
1394 }
1395
1396 /**
1397  * i40evf_init_interrupt_scheme - Determine if MSIX is supported and init
1398  * @adapter: board private structure to initialize
1399  *
1400  **/
1401 int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter)
1402 {
1403         int err;
1404
1405         err = i40evf_set_interrupt_capability(adapter);
1406         if (err) {
1407                 dev_err(&adapter->pdev->dev,
1408                         "Unable to setup interrupt capabilities\n");
1409                 goto err_set_interrupt;
1410         }
1411
1412         err = i40evf_alloc_q_vectors(adapter);
1413         if (err) {
1414                 dev_err(&adapter->pdev->dev,
1415                         "Unable to allocate memory for queue vectors\n");
1416                 goto err_alloc_q_vectors;
1417         }
1418
1419         err = i40evf_alloc_queues(adapter);
1420         if (err) {
1421                 dev_err(&adapter->pdev->dev,
1422                         "Unable to allocate memory for queues\n");
1423                 goto err_alloc_queues;
1424         }
1425
1426         dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
1427                  (adapter->num_active_queues > 1) ? "Enabled" : "Disabled",
1428                  adapter->num_active_queues);
1429
1430         return 0;
1431 err_alloc_queues:
1432         i40evf_free_q_vectors(adapter);
1433 err_alloc_q_vectors:
1434         i40evf_reset_interrupt_capability(adapter);
1435 err_set_interrupt:
1436         return err;
1437 }
1438
1439 /**
1440  * i40evf_watchdog_timer - Periodic call-back timer
1441  * @data: pointer to adapter disguised as unsigned long
1442  **/
1443 static void i40evf_watchdog_timer(unsigned long data)
1444 {
1445         struct i40evf_adapter *adapter = (struct i40evf_adapter *)data;
1446
1447         schedule_work(&adapter->watchdog_task);
1448         /* timer will be rescheduled in watchdog task */
1449 }
1450
1451 /**
1452  * i40evf_watchdog_task - Periodic call-back task
1453  * @work: pointer to work_struct
1454  **/
1455 static void i40evf_watchdog_task(struct work_struct *work)
1456 {
1457         struct i40evf_adapter *adapter = container_of(work,
1458                                                       struct i40evf_adapter,
1459                                                       watchdog_task);
1460         struct i40e_hw *hw = &adapter->hw;
1461         u32 reg_val;
1462
1463         if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
1464                 goto restart_watchdog;
1465
1466         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1467                 reg_val = rd32(hw, I40E_VFGEN_RSTAT) &
1468                           I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1469                 if ((reg_val == I40E_VFR_VFACTIVE) ||
1470                     (reg_val == I40E_VFR_COMPLETED)) {
1471                         /* A chance for redemption! */
1472                         dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
1473                         adapter->state = __I40EVF_STARTUP;
1474                         adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1475                         schedule_delayed_work(&adapter->init_task, 10);
1476                         clear_bit(__I40EVF_IN_CRITICAL_TASK,
1477                                   &adapter->crit_section);
1478                         /* Don't reschedule the watchdog, since we've restarted
1479                          * the init task. When init_task contacts the PF and
1480                          * gets everything set up again, it'll restart the
1481                          * watchdog for us. Down, boy. Sit. Stay. Woof.
1482                          */
1483                         return;
1484                 }
1485                 adapter->aq_required = 0;
1486                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1487                 goto watchdog_done;
1488         }
1489
1490         if ((adapter->state < __I40EVF_DOWN) ||
1491             (adapter->flags & I40EVF_FLAG_RESET_PENDING))
1492                 goto watchdog_done;
1493
1494         /* check for reset */
1495         reg_val = rd32(hw, I40E_VF_ARQLEN1) & I40E_VF_ARQLEN1_ARQENABLE_MASK;
1496         if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) && !reg_val) {
1497                 adapter->state = __I40EVF_RESETTING;
1498                 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1499                 dev_err(&adapter->pdev->dev, "Hardware reset detected\n");
1500                 schedule_work(&adapter->reset_task);
1501                 adapter->aq_required = 0;
1502                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1503                 goto watchdog_done;
1504         }
1505
1506         /* Process admin queue tasks. After init, everything gets done
1507          * here so we don't race on the admin queue.
1508          */
1509         if (adapter->current_op) {
1510                 if (!i40evf_asq_done(hw)) {
1511                         dev_dbg(&adapter->pdev->dev, "Admin queue timeout\n");
1512                         i40evf_send_api_ver(adapter);
1513                 }
1514                 goto watchdog_done;
1515         }
1516         if (adapter->aq_required & I40EVF_FLAG_AQ_GET_CONFIG) {
1517                 i40evf_send_vf_config_msg(adapter);
1518                 goto watchdog_done;
1519         }
1520
1521         if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
1522                 i40evf_disable_queues(adapter);
1523                 goto watchdog_done;
1524         }
1525
1526         if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
1527                 i40evf_map_queues(adapter);
1528                 goto watchdog_done;
1529         }
1530
1531         if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
1532                 i40evf_add_ether_addrs(adapter);
1533                 goto watchdog_done;
1534         }
1535
1536         if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
1537                 i40evf_add_vlans(adapter);
1538                 goto watchdog_done;
1539         }
1540
1541         if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
1542                 i40evf_del_ether_addrs(adapter);
1543                 goto watchdog_done;
1544         }
1545
1546         if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
1547                 i40evf_del_vlans(adapter);
1548                 goto watchdog_done;
1549         }
1550
1551         if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
1552                 i40evf_configure_queues(adapter);
1553                 goto watchdog_done;
1554         }
1555
1556         if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
1557                 i40evf_enable_queues(adapter);
1558                 goto watchdog_done;
1559         }
1560
1561         if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_RSS) {
1562                 /* This message goes straight to the firmware, not the
1563                  * PF, so we don't have to set current_op as we will
1564                  * not get a response through the ARQ.
1565                  */
1566                 i40evf_configure_rss(adapter);
1567                 adapter->aq_required &= ~I40EVF_FLAG_AQ_CONFIGURE_RSS;
1568                 goto watchdog_done;
1569         }
1570
1571         if (adapter->state == __I40EVF_RUNNING)
1572                 i40evf_request_stats(adapter);
1573 watchdog_done:
1574         if (adapter->state == __I40EVF_RUNNING) {
1575                 i40evf_irq_enable_queues(adapter, ~0);
1576                 i40evf_fire_sw_int(adapter, 0xFF);
1577         } else {
1578                 i40evf_fire_sw_int(adapter, 0x1);
1579         }
1580
1581         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1582 restart_watchdog:
1583         if (adapter->state == __I40EVF_REMOVE)
1584                 return;
1585         if (adapter->aq_required)
1586                 mod_timer(&adapter->watchdog_timer,
1587                           jiffies + msecs_to_jiffies(20));
1588         else
1589                 mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
1590         schedule_work(&adapter->adminq_task);
1591 }
1592
1593 #define I40EVF_RESET_WAIT_MS 10
1594 #define I40EVF_RESET_WAIT_COUNT 500
1595 /**
1596  * i40evf_reset_task - Call-back task to handle hardware reset
1597  * @work: pointer to work_struct
1598  *
1599  * During reset we need to shut down and reinitialize the admin queue
1600  * before we can use it to communicate with the PF again. We also clear
1601  * and reinit the rings because that context is lost as well.
1602  **/
1603 static void i40evf_reset_task(struct work_struct *work)
1604 {
1605         struct i40evf_adapter *adapter = container_of(work,
1606                                                       struct i40evf_adapter,
1607                                                       reset_task);
1608         struct net_device *netdev = adapter->netdev;
1609         struct i40e_hw *hw = &adapter->hw;
1610         struct i40evf_mac_filter *f;
1611         u32 reg_val;
1612         int i = 0, err;
1613
1614         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1615                                 &adapter->crit_section))
1616                 usleep_range(500, 1000);
1617
1618         i40evf_misc_irq_disable(adapter);
1619         if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) {
1620                 adapter->flags &= ~I40EVF_FLAG_RESET_NEEDED;
1621                 /* Restart the AQ here. If we have been reset but didn't
1622                  * detect it, or if the PF had to reinit, our AQ will be hosed.
1623                  */
1624                 i40evf_shutdown_adminq(hw);
1625                 i40evf_init_adminq(hw);
1626                 i40evf_request_reset(adapter);
1627         }
1628         adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1629
1630         /* poll until we see the reset actually happen */
1631         for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1632                 reg_val = rd32(hw, I40E_VF_ARQLEN1) &
1633                           I40E_VF_ARQLEN1_ARQENABLE_MASK;
1634                 if (!reg_val)
1635                         break;
1636                 usleep_range(5000, 10000);
1637         }
1638         if (i == I40EVF_RESET_WAIT_COUNT) {
1639                 dev_info(&adapter->pdev->dev, "Never saw reset\n");
1640                 goto continue_reset; /* act like the reset happened */
1641         }
1642
1643         /* wait until the reset is complete and the PF is responding to us */
1644         for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1645                 reg_val = rd32(hw, I40E_VFGEN_RSTAT) &
1646                           I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1647                 if (reg_val == I40E_VFR_VFACTIVE)
1648                         break;
1649                 msleep(I40EVF_RESET_WAIT_MS);
1650         }
1651         /* extra wait to make sure minimum wait is met */
1652         msleep(I40EVF_RESET_WAIT_MS);
1653         if (i == I40EVF_RESET_WAIT_COUNT) {
1654                 struct i40evf_mac_filter *ftmp;
1655                 struct i40evf_vlan_filter *fv, *fvtmp;
1656
1657                 /* reset never finished */
1658                 dev_err(&adapter->pdev->dev, "Reset never finished (%x)\n",
1659                         reg_val);
1660                 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
1661
1662                 if (netif_running(adapter->netdev)) {
1663                         set_bit(__I40E_DOWN, &adapter->vsi.state);
1664                         netif_carrier_off(netdev);
1665                         netif_tx_disable(netdev);
1666                         i40evf_napi_disable_all(adapter);
1667                         i40evf_irq_disable(adapter);
1668                         i40evf_free_traffic_irqs(adapter);
1669                         i40evf_free_all_tx_resources(adapter);
1670                         i40evf_free_all_rx_resources(adapter);
1671                 }
1672
1673                 /* Delete all of the filters, both MAC and VLAN. */
1674                 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list,
1675                                          list) {
1676                         list_del(&f->list);
1677                         kfree(f);
1678                 }
1679
1680                 list_for_each_entry_safe(fv, fvtmp, &adapter->vlan_filter_list,
1681                                          list) {
1682                         list_del(&fv->list);
1683                         kfree(fv);
1684                 }
1685
1686                 i40evf_free_misc_irq(adapter);
1687                 i40evf_reset_interrupt_capability(adapter);
1688                 i40evf_free_queues(adapter);
1689                 i40evf_free_q_vectors(adapter);
1690                 kfree(adapter->vf_res);
1691                 i40evf_shutdown_adminq(hw);
1692                 adapter->netdev->flags &= ~IFF_UP;
1693                 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1694                 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1695                 dev_info(&adapter->pdev->dev, "Reset task did not complete, VF disabled\n");
1696                 return; /* Do not attempt to reinit. It's dead, Jim. */
1697         }
1698
1699 continue_reset:
1700         if (netif_running(adapter->netdev)) {
1701                 netif_carrier_off(netdev);
1702                 netif_tx_stop_all_queues(netdev);
1703                 i40evf_napi_disable_all(adapter);
1704         }
1705         i40evf_irq_disable(adapter);
1706
1707         adapter->state = __I40EVF_RESETTING;
1708         adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1709
1710         /* free the Tx/Rx rings and descriptors, might be better to just
1711          * re-use them sometime in the future
1712          */
1713         i40evf_free_all_rx_resources(adapter);
1714         i40evf_free_all_tx_resources(adapter);
1715
1716         /* kill and reinit the admin queue */
1717         if (i40evf_shutdown_adminq(hw))
1718                 dev_warn(&adapter->pdev->dev, "Failed to shut down adminq\n");
1719         adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1720         err = i40evf_init_adminq(hw);
1721         if (err)
1722                 dev_info(&adapter->pdev->dev, "Failed to init adminq: %d\n",
1723                          err);
1724
1725         adapter->aq_required = I40EVF_FLAG_AQ_GET_CONFIG;
1726         adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
1727
1728         /* re-add all MAC filters */
1729         list_for_each_entry(f, &adapter->mac_filter_list, list) {
1730                 f->add = true;
1731         }
1732         /* re-add all VLAN filters */
1733         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
1734                 f->add = true;
1735         }
1736         adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
1737         adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
1738         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1739         i40evf_misc_irq_enable(adapter);
1740
1741         mod_timer(&adapter->watchdog_timer, jiffies + 2);
1742
1743         if (netif_running(adapter->netdev)) {
1744                 /* allocate transmit descriptors */
1745                 err = i40evf_setup_all_tx_resources(adapter);
1746                 if (err)
1747                         goto reset_err;
1748
1749                 /* allocate receive descriptors */
1750                 err = i40evf_setup_all_rx_resources(adapter);
1751                 if (err)
1752                         goto reset_err;
1753
1754                 i40evf_configure(adapter);
1755
1756                 err = i40evf_up_complete(adapter);
1757                 if (err)
1758                         goto reset_err;
1759
1760                 i40evf_irq_enable(adapter, true);
1761         } else {
1762                 adapter->state = __I40EVF_DOWN;
1763         }
1764
1765         return;
1766 reset_err:
1767         dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
1768         i40evf_close(adapter->netdev);
1769 }
1770
1771 /**
1772  * i40evf_adminq_task - worker thread to clean the admin queue
1773  * @work: pointer to work_struct containing our data
1774  **/
1775 static void i40evf_adminq_task(struct work_struct *work)
1776 {
1777         struct i40evf_adapter *adapter =
1778                 container_of(work, struct i40evf_adapter, adminq_task);
1779         struct i40e_hw *hw = &adapter->hw;
1780         struct i40e_arq_event_info event;
1781         struct i40e_virtchnl_msg *v_msg;
1782         i40e_status ret;
1783         u32 val, oldval;
1784         u16 pending;
1785
1786         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
1787                 goto out;
1788
1789         event.buf_len = I40EVF_MAX_AQ_BUF_SIZE;
1790         event.msg_buf = kzalloc(event.buf_len, GFP_KERNEL);
1791         if (!event.msg_buf)
1792                 goto out;
1793
1794         v_msg = (struct i40e_virtchnl_msg *)&event.desc;
1795         do {
1796                 ret = i40evf_clean_arq_element(hw, &event, &pending);
1797                 if (ret || !v_msg->v_opcode)
1798                         break; /* No event to process or error cleaning ARQ */
1799
1800                 i40evf_virtchnl_completion(adapter, v_msg->v_opcode,
1801                                            v_msg->v_retval, event.msg_buf,
1802                                            event.msg_len);
1803                 if (pending != 0)
1804                         memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
1805         } while (pending);
1806
1807         if ((adapter->flags &
1808              (I40EVF_FLAG_RESET_PENDING | I40EVF_FLAG_RESET_NEEDED)) ||
1809             adapter->state == __I40EVF_RESETTING)
1810                 goto freedom;
1811
1812         /* check for error indications */
1813         val = rd32(hw, hw->aq.arq.len);
1814         oldval = val;
1815         if (val & I40E_VF_ARQLEN1_ARQVFE_MASK) {
1816                 dev_info(&adapter->pdev->dev, "ARQ VF Error detected\n");
1817                 val &= ~I40E_VF_ARQLEN1_ARQVFE_MASK;
1818         }
1819         if (val & I40E_VF_ARQLEN1_ARQOVFL_MASK) {
1820                 dev_info(&adapter->pdev->dev, "ARQ Overflow Error detected\n");
1821                 val &= ~I40E_VF_ARQLEN1_ARQOVFL_MASK;
1822         }
1823         if (val & I40E_VF_ARQLEN1_ARQCRIT_MASK) {
1824                 dev_info(&adapter->pdev->dev, "ARQ Critical Error detected\n");
1825                 val &= ~I40E_VF_ARQLEN1_ARQCRIT_MASK;
1826         }
1827         if (oldval != val)
1828                 wr32(hw, hw->aq.arq.len, val);
1829
1830         val = rd32(hw, hw->aq.asq.len);
1831         oldval = val;
1832         if (val & I40E_VF_ATQLEN1_ATQVFE_MASK) {
1833                 dev_info(&adapter->pdev->dev, "ASQ VF Error detected\n");
1834                 val &= ~I40E_VF_ATQLEN1_ATQVFE_MASK;
1835         }
1836         if (val & I40E_VF_ATQLEN1_ATQOVFL_MASK) {
1837                 dev_info(&adapter->pdev->dev, "ASQ Overflow Error detected\n");
1838                 val &= ~I40E_VF_ATQLEN1_ATQOVFL_MASK;
1839         }
1840         if (val & I40E_VF_ATQLEN1_ATQCRIT_MASK) {
1841                 dev_info(&adapter->pdev->dev, "ASQ Critical Error detected\n");
1842                 val &= ~I40E_VF_ATQLEN1_ATQCRIT_MASK;
1843         }
1844         if (oldval != val)
1845                 wr32(hw, hw->aq.asq.len, val);
1846
1847 freedom:
1848         kfree(event.msg_buf);
1849 out:
1850         /* re-enable Admin queue interrupt cause */
1851         i40evf_misc_irq_enable(adapter);
1852 }
1853
1854 /**
1855  * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
1856  * @adapter: board private structure
1857  *
1858  * Free all transmit software resources
1859  **/
1860 void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
1861 {
1862         int i;
1863
1864         for (i = 0; i < adapter->num_active_queues; i++)
1865                 if (adapter->tx_rings[i]->desc)
1866                         i40evf_free_tx_resources(adapter->tx_rings[i]);
1867 }
1868
1869 /**
1870  * i40evf_setup_all_tx_resources - allocate all queues Tx resources
1871  * @adapter: board private structure
1872  *
1873  * If this function returns with an error, then it's possible one or
1874  * more of the rings is populated (while the rest are not).  It is the
1875  * callers duty to clean those orphaned rings.
1876  *
1877  * Return 0 on success, negative on failure
1878  **/
1879 static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter)
1880 {
1881         int i, err = 0;
1882
1883         for (i = 0; i < adapter->num_active_queues; i++) {
1884                 adapter->tx_rings[i]->count = adapter->tx_desc_count;
1885                 err = i40evf_setup_tx_descriptors(adapter->tx_rings[i]);
1886                 if (!err)
1887                         continue;
1888                 dev_err(&adapter->pdev->dev,
1889                         "Allocation for Tx Queue %u failed\n", i);
1890                 break;
1891         }
1892
1893         return err;
1894 }
1895
1896 /**
1897  * i40evf_setup_all_rx_resources - allocate all queues Rx resources
1898  * @adapter: board private structure
1899  *
1900  * If this function returns with an error, then it's possible one or
1901  * more of the rings is populated (while the rest are not).  It is the
1902  * callers duty to clean those orphaned rings.
1903  *
1904  * Return 0 on success, negative on failure
1905  **/
1906 static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter)
1907 {
1908         int i, err = 0;
1909
1910         for (i = 0; i < adapter->num_active_queues; i++) {
1911                 adapter->rx_rings[i]->count = adapter->rx_desc_count;
1912                 err = i40evf_setup_rx_descriptors(adapter->rx_rings[i]);
1913                 if (!err)
1914                         continue;
1915                 dev_err(&adapter->pdev->dev,
1916                         "Allocation for Rx Queue %u failed\n", i);
1917                 break;
1918         }
1919         return err;
1920 }
1921
1922 /**
1923  * i40evf_free_all_rx_resources - Free Rx Resources for All Queues
1924  * @adapter: board private structure
1925  *
1926  * Free all receive software resources
1927  **/
1928 void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
1929 {
1930         int i;
1931
1932         for (i = 0; i < adapter->num_active_queues; i++)
1933                 if (adapter->rx_rings[i]->desc)
1934                         i40evf_free_rx_resources(adapter->rx_rings[i]);
1935 }
1936
1937 /**
1938  * i40evf_open - Called when a network interface is made active
1939  * @netdev: network interface device structure
1940  *
1941  * Returns 0 on success, negative value on failure
1942  *
1943  * The open entry point is called when a network interface is made
1944  * active by the system (IFF_UP).  At this point all resources needed
1945  * for transmit and receive operations are allocated, the interrupt
1946  * handler is registered with the OS, the watchdog timer is started,
1947  * and the stack is notified that the interface is ready.
1948  **/
1949 static int i40evf_open(struct net_device *netdev)
1950 {
1951         struct i40evf_adapter *adapter = netdev_priv(netdev);
1952         int err;
1953
1954         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1955                 dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
1956                 return -EIO;
1957         }
1958         if (adapter->state != __I40EVF_DOWN || adapter->aq_required)
1959                 return -EBUSY;
1960
1961         /* allocate transmit descriptors */
1962         err = i40evf_setup_all_tx_resources(adapter);
1963         if (err)
1964                 goto err_setup_tx;
1965
1966         /* allocate receive descriptors */
1967         err = i40evf_setup_all_rx_resources(adapter);
1968         if (err)
1969                 goto err_setup_rx;
1970
1971         /* clear any pending interrupts, may auto mask */
1972         err = i40evf_request_traffic_irqs(adapter, netdev->name);
1973         if (err)
1974                 goto err_req_irq;
1975
1976         i40evf_add_filter(adapter, adapter->hw.mac.addr);
1977         i40evf_configure(adapter);
1978
1979         err = i40evf_up_complete(adapter);
1980         if (err)
1981                 goto err_req_irq;
1982
1983         i40evf_irq_enable(adapter, true);
1984
1985         return 0;
1986
1987 err_req_irq:
1988         i40evf_down(adapter);
1989         i40evf_free_traffic_irqs(adapter);
1990 err_setup_rx:
1991         i40evf_free_all_rx_resources(adapter);
1992 err_setup_tx:
1993         i40evf_free_all_tx_resources(adapter);
1994
1995         return err;
1996 }
1997
1998 /**
1999  * i40evf_close - Disables a network interface
2000  * @netdev: network interface device structure
2001  *
2002  * Returns 0, this is not allowed to fail
2003  *
2004  * The close entry point is called when an interface is de-activated
2005  * by the OS.  The hardware is still under the drivers control, but
2006  * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
2007  * are freed, along with all transmit and receive resources.
2008  **/
2009 static int i40evf_close(struct net_device *netdev)
2010 {
2011         struct i40evf_adapter *adapter = netdev_priv(netdev);
2012
2013         if (adapter->state <= __I40EVF_DOWN)
2014                 return 0;
2015
2016
2017         set_bit(__I40E_DOWN, &adapter->vsi.state);
2018
2019         i40evf_down(adapter);
2020         adapter->state = __I40EVF_DOWN;
2021         i40evf_free_traffic_irqs(adapter);
2022
2023         return 0;
2024 }
2025
2026 /**
2027  * i40evf_get_stats - Get System Network Statistics
2028  * @netdev: network interface device structure
2029  *
2030  * Returns the address of the device statistics structure.
2031  * The statistics are actually updated from the timer callback.
2032  **/
2033 static struct net_device_stats *i40evf_get_stats(struct net_device *netdev)
2034 {
2035         struct i40evf_adapter *adapter = netdev_priv(netdev);
2036
2037         /* only return the current stats */
2038         return &adapter->net_stats;
2039 }
2040
2041 /**
2042  * i40evf_change_mtu - Change the Maximum Transfer Unit
2043  * @netdev: network interface device structure
2044  * @new_mtu: new value for maximum frame size
2045  *
2046  * Returns 0 on success, negative on failure
2047  **/
2048 static int i40evf_change_mtu(struct net_device *netdev, int new_mtu)
2049 {
2050         struct i40evf_adapter *adapter = netdev_priv(netdev);
2051         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
2052
2053         if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
2054                 return -EINVAL;
2055
2056         netdev->mtu = new_mtu;
2057         adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
2058         schedule_work(&adapter->reset_task);
2059
2060         return 0;
2061 }
2062
2063 static const struct net_device_ops i40evf_netdev_ops = {
2064         .ndo_open               = i40evf_open,
2065         .ndo_stop               = i40evf_close,
2066         .ndo_start_xmit         = i40evf_xmit_frame,
2067         .ndo_get_stats          = i40evf_get_stats,
2068         .ndo_set_rx_mode        = i40evf_set_rx_mode,
2069         .ndo_validate_addr      = eth_validate_addr,
2070         .ndo_set_mac_address    = i40evf_set_mac,
2071         .ndo_change_mtu         = i40evf_change_mtu,
2072         .ndo_tx_timeout         = i40evf_tx_timeout,
2073         .ndo_vlan_rx_add_vid    = i40evf_vlan_rx_add_vid,
2074         .ndo_vlan_rx_kill_vid   = i40evf_vlan_rx_kill_vid,
2075 #ifdef CONFIG_NET_POLL_CONTROLLER
2076         .ndo_poll_controller    = i40evf_netpoll,
2077 #endif
2078 };
2079
2080 /**
2081  * i40evf_check_reset_complete - check that VF reset is complete
2082  * @hw: pointer to hw struct
2083  *
2084  * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
2085  **/
2086 static int i40evf_check_reset_complete(struct i40e_hw *hw)
2087 {
2088         u32 rstat;
2089         int i;
2090
2091         for (i = 0; i < 100; i++) {
2092                 rstat = rd32(hw, I40E_VFGEN_RSTAT) &
2093                             I40E_VFGEN_RSTAT_VFR_STATE_MASK;
2094                 if ((rstat == I40E_VFR_VFACTIVE) ||
2095                     (rstat == I40E_VFR_COMPLETED))
2096                         return 0;
2097                 usleep_range(10, 20);
2098         }
2099         return -EBUSY;
2100 }
2101
2102 /**
2103  * i40evf_process_config - Process the config information we got from the PF
2104  * @adapter: board private structure
2105  *
2106  * Verify that we have a valid config struct, and set up our netdev features
2107  * and our VSI struct.
2108  **/
2109 int i40evf_process_config(struct i40evf_adapter *adapter)
2110 {
2111         struct net_device *netdev = adapter->netdev;
2112         int i;
2113
2114         /* got VF config message back from PF, now we can parse it */
2115         for (i = 0; i < adapter->vf_res->num_vsis; i++) {
2116                 if (adapter->vf_res->vsi_res[i].vsi_type == I40E_VSI_SRIOV)
2117                         adapter->vsi_res = &adapter->vf_res->vsi_res[i];
2118         }
2119         if (!adapter->vsi_res) {
2120                 dev_err(&adapter->pdev->dev, "No LAN VSI found\n");
2121                 return -ENODEV;
2122         }
2123
2124         if (adapter->vf_res->vf_offload_flags
2125             & I40E_VIRTCHNL_VF_OFFLOAD_VLAN) {
2126                 netdev->vlan_features = netdev->features &
2127                                         ~(NETIF_F_HW_VLAN_CTAG_TX |
2128                                           NETIF_F_HW_VLAN_CTAG_RX |
2129                                           NETIF_F_HW_VLAN_CTAG_FILTER);
2130                 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX |
2131                                     NETIF_F_HW_VLAN_CTAG_RX |
2132                                     NETIF_F_HW_VLAN_CTAG_FILTER;
2133         }
2134         netdev->features |= NETIF_F_HIGHDMA |
2135                             NETIF_F_SG |
2136                             NETIF_F_IP_CSUM |
2137                             NETIF_F_SCTP_CSUM |
2138                             NETIF_F_IPV6_CSUM |
2139                             NETIF_F_TSO |
2140                             NETIF_F_TSO6 |
2141                             NETIF_F_RXCSUM |
2142                             NETIF_F_GRO;
2143
2144         /* copy netdev features into list of user selectable features */
2145         netdev->hw_features |= netdev->features;
2146         netdev->hw_features &= ~NETIF_F_RXCSUM;
2147
2148         adapter->vsi.id = adapter->vsi_res->vsi_id;
2149
2150         adapter->vsi.back = adapter;
2151         adapter->vsi.base_vector = 1;
2152         adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
2153         adapter->vsi.rx_itr_setting = (I40E_ITR_DYNAMIC |
2154                                        ITR_REG_TO_USEC(I40E_ITR_RX_DEF));
2155         adapter->vsi.tx_itr_setting = (I40E_ITR_DYNAMIC |
2156                                        ITR_REG_TO_USEC(I40E_ITR_TX_DEF));
2157         adapter->vsi.netdev = adapter->netdev;
2158         adapter->vsi.qs_handle = adapter->vsi_res->qset_handle;
2159         return 0;
2160 }
2161
2162 /**
2163  * i40evf_init_task - worker thread to perform delayed initialization
2164  * @work: pointer to work_struct containing our data
2165  *
2166  * This task completes the work that was begun in probe. Due to the nature
2167  * of VF-PF communications, we may need to wait tens of milliseconds to get
2168  * responses back from the PF. Rather than busy-wait in probe and bog down the
2169  * whole system, we'll do it in a task so we can sleep.
2170  * This task only runs during driver init. Once we've established
2171  * communications with the PF driver and set up our netdev, the watchdog
2172  * takes over.
2173  **/
2174 static void i40evf_init_task(struct work_struct *work)
2175 {
2176         struct i40evf_adapter *adapter = container_of(work,
2177                                                       struct i40evf_adapter,
2178                                                       init_task.work);
2179         struct net_device *netdev = adapter->netdev;
2180         struct i40e_hw *hw = &adapter->hw;
2181         struct pci_dev *pdev = adapter->pdev;
2182         int err, bufsz;
2183
2184         switch (adapter->state) {
2185         case __I40EVF_STARTUP:
2186                 /* driver loaded, probe complete */
2187                 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
2188                 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
2189                 err = i40e_set_mac_type(hw);
2190                 if (err) {
2191                         dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
2192                                 err);
2193                         goto err;
2194                 }
2195                 err = i40evf_check_reset_complete(hw);
2196                 if (err) {
2197                         dev_info(&pdev->dev, "Device is still in reset (%d), retrying\n",
2198                                  err);
2199                         goto err;
2200                 }
2201                 hw->aq.num_arq_entries = I40EVF_AQ_LEN;
2202                 hw->aq.num_asq_entries = I40EVF_AQ_LEN;
2203                 hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2204                 hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2205
2206                 err = i40evf_init_adminq(hw);
2207                 if (err) {
2208                         dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
2209                                 err);
2210                         goto err;
2211                 }
2212                 err = i40evf_send_api_ver(adapter);
2213                 if (err) {
2214                         dev_err(&pdev->dev, "Unable to send to PF (%d)\n", err);
2215                         i40evf_shutdown_adminq(hw);
2216                         goto err;
2217                 }
2218                 adapter->state = __I40EVF_INIT_VERSION_CHECK;
2219                 goto restart;
2220         case __I40EVF_INIT_VERSION_CHECK:
2221                 if (!i40evf_asq_done(hw)) {
2222                         dev_err(&pdev->dev, "Admin queue command never completed\n");
2223                         i40evf_shutdown_adminq(hw);
2224                         adapter->state = __I40EVF_STARTUP;
2225                         goto err;
2226                 }
2227
2228                 /* aq msg sent, awaiting reply */
2229                 err = i40evf_verify_api_ver(adapter);
2230                 if (err) {
2231                         if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
2232                                 err = i40evf_send_api_ver(adapter);
2233                         else
2234                                 dev_err(&pdev->dev, "Unsupported PF API version %d.%d, expected %d.%d\n",
2235                                         adapter->pf_version.major,
2236                                         adapter->pf_version.minor,
2237                                         I40E_VIRTCHNL_VERSION_MAJOR,
2238                                         I40E_VIRTCHNL_VERSION_MINOR);
2239                         goto err;
2240                 }
2241                 err = i40evf_send_vf_config_msg(adapter);
2242                 if (err) {
2243                         dev_err(&pdev->dev, "Unable to send config request (%d)\n",
2244                                 err);
2245                         goto err;
2246                 }
2247                 adapter->state = __I40EVF_INIT_GET_RESOURCES;
2248                 goto restart;
2249         case __I40EVF_INIT_GET_RESOURCES:
2250                 /* aq msg sent, awaiting reply */
2251                 if (!adapter->vf_res) {
2252                         bufsz = sizeof(struct i40e_virtchnl_vf_resource) +
2253                                 (I40E_MAX_VF_VSI *
2254                                  sizeof(struct i40e_virtchnl_vsi_resource));
2255                         adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
2256                         if (!adapter->vf_res)
2257                                 goto err;
2258                 }
2259                 err = i40evf_get_vf_config(adapter);
2260                 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK) {
2261                         err = i40evf_send_vf_config_msg(adapter);
2262                         goto err;
2263                 }
2264                 if (err) {
2265                         dev_err(&pdev->dev, "Unable to get VF config (%d)\n",
2266                                 err);
2267                         goto err_alloc;
2268                 }
2269                 adapter->state = __I40EVF_INIT_SW;
2270                 break;
2271         default:
2272                 goto err_alloc;
2273         }
2274         if (i40evf_process_config(adapter))
2275                 goto err_alloc;
2276         adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
2277
2278         adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
2279
2280         netdev->netdev_ops = &i40evf_netdev_ops;
2281         i40evf_set_ethtool_ops(netdev);
2282         netdev->watchdog_timeo = 5 * HZ;
2283
2284         if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
2285                 dev_info(&pdev->dev, "Invalid MAC address %pM, using random\n",
2286                          adapter->hw.mac.addr);
2287                 eth_hw_addr_random(netdev);
2288                 ether_addr_copy(adapter->hw.mac.addr, netdev->dev_addr);
2289         } else {
2290                 adapter->flags |= I40EVF_FLAG_ADDR_SET_BY_PF;
2291                 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
2292                 ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
2293         }
2294
2295         init_timer(&adapter->watchdog_timer);
2296         adapter->watchdog_timer.function = &i40evf_watchdog_timer;
2297         adapter->watchdog_timer.data = (unsigned long)adapter;
2298         mod_timer(&adapter->watchdog_timer, jiffies + 1);
2299
2300         adapter->num_active_queues = min_t(int,
2301                                            adapter->vsi_res->num_queue_pairs,
2302                                            (int)(num_online_cpus()));
2303         adapter->tx_desc_count = I40EVF_DEFAULT_TXD;
2304         adapter->rx_desc_count = I40EVF_DEFAULT_RXD;
2305         err = i40evf_init_interrupt_scheme(adapter);
2306         if (err)
2307                 goto err_sw_init;
2308         i40evf_map_rings_to_vectors(adapter);
2309         if (adapter->vf_res->vf_offload_flags &
2310                     I40E_VIRTCHNL_VF_OFFLOAD_WB_ON_ITR)
2311                 adapter->flags |= I40EVF_FLAG_WB_ON_ITR_CAPABLE;
2312         if (!RSS_AQ(adapter))
2313                 i40evf_configure_rss(adapter);
2314         err = i40evf_request_misc_irq(adapter);
2315         if (err)
2316                 goto err_sw_init;
2317
2318         netif_carrier_off(netdev);
2319
2320         if (!adapter->netdev_registered) {
2321                 err = register_netdev(netdev);
2322                 if (err)
2323                         goto err_register;
2324         }
2325
2326         adapter->netdev_registered = true;
2327
2328         netif_tx_stop_all_queues(netdev);
2329
2330         dev_info(&pdev->dev, "MAC address: %pM\n", adapter->hw.mac.addr);
2331         if (netdev->features & NETIF_F_GRO)
2332                 dev_info(&pdev->dev, "GRO is enabled\n");
2333
2334         dev_info(&pdev->dev, "%s\n", i40evf_driver_string);
2335         adapter->state = __I40EVF_DOWN;
2336         set_bit(__I40E_DOWN, &adapter->vsi.state);
2337         i40evf_misc_irq_enable(adapter);
2338
2339         if (RSS_AQ(adapter)) {
2340                 adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_RSS;
2341                 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
2342         } else {
2343                 i40evf_configure_rss(adapter);
2344         }
2345         return;
2346 restart:
2347         schedule_delayed_work(&adapter->init_task, msecs_to_jiffies(30));
2348         return;
2349
2350 err_register:
2351         i40evf_free_misc_irq(adapter);
2352 err_sw_init:
2353         i40evf_reset_interrupt_capability(adapter);
2354 err_alloc:
2355         kfree(adapter->vf_res);
2356         adapter->vf_res = NULL;
2357 err:
2358         /* Things went into the weeds, so try again later */
2359         if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
2360                 dev_err(&pdev->dev, "Failed to communicate with PF; giving up\n");
2361                 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
2362                 return; /* do not reschedule */
2363         }
2364         schedule_delayed_work(&adapter->init_task, HZ);
2365 }
2366
2367 /**
2368  * i40evf_shutdown - Shutdown the device in preparation for a reboot
2369  * @pdev: pci device structure
2370  **/
2371 static void i40evf_shutdown(struct pci_dev *pdev)
2372 {
2373         struct net_device *netdev = pci_get_drvdata(pdev);
2374         struct i40evf_adapter *adapter = netdev_priv(netdev);
2375
2376         netif_device_detach(netdev);
2377
2378         if (netif_running(netdev))
2379                 i40evf_close(netdev);
2380
2381         /* Prevent the watchdog from running. */
2382         adapter->state = __I40EVF_REMOVE;
2383         adapter->aq_required = 0;
2384
2385 #ifdef CONFIG_PM
2386         pci_save_state(pdev);
2387
2388 #endif
2389         pci_disable_device(pdev);
2390 }
2391
2392 /**
2393  * i40evf_probe - Device Initialization Routine
2394  * @pdev: PCI device information struct
2395  * @ent: entry in i40evf_pci_tbl
2396  *
2397  * Returns 0 on success, negative on failure
2398  *
2399  * i40evf_probe initializes an adapter identified by a pci_dev structure.
2400  * The OS initialization, configuring of the adapter private structure,
2401  * and a hardware reset occur.
2402  **/
2403 static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2404 {
2405         struct net_device *netdev;
2406         struct i40evf_adapter *adapter = NULL;
2407         struct i40e_hw *hw = NULL;
2408         int err;
2409
2410         err = pci_enable_device(pdev);
2411         if (err)
2412                 return err;
2413
2414         err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
2415         if (err) {
2416                 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2417                 if (err) {
2418                         dev_err(&pdev->dev,
2419                                 "DMA configuration failed: 0x%x\n", err);
2420                         goto err_dma;
2421                 }
2422         }
2423
2424         err = pci_request_regions(pdev, i40evf_driver_name);
2425         if (err) {
2426                 dev_err(&pdev->dev,
2427                         "pci_request_regions failed 0x%x\n", err);
2428                 goto err_pci_reg;
2429         }
2430
2431         pci_enable_pcie_error_reporting(pdev);
2432
2433         pci_set_master(pdev);
2434
2435         netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter),
2436                                    MAX_TX_QUEUES);
2437         if (!netdev) {
2438                 err = -ENOMEM;
2439                 goto err_alloc_etherdev;
2440         }
2441
2442         SET_NETDEV_DEV(netdev, &pdev->dev);
2443
2444         pci_set_drvdata(pdev, netdev);
2445         adapter = netdev_priv(netdev);
2446
2447         adapter->netdev = netdev;
2448         adapter->pdev = pdev;
2449
2450         hw = &adapter->hw;
2451         hw->back = adapter;
2452
2453         adapter->msg_enable = BIT(DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
2454         adapter->state = __I40EVF_STARTUP;
2455
2456         /* Call save state here because it relies on the adapter struct. */
2457         pci_save_state(pdev);
2458
2459         hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
2460                               pci_resource_len(pdev, 0));
2461         if (!hw->hw_addr) {
2462                 err = -EIO;
2463                 goto err_ioremap;
2464         }
2465         hw->vendor_id = pdev->vendor;
2466         hw->device_id = pdev->device;
2467         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2468         hw->subsystem_vendor_id = pdev->subsystem_vendor;
2469         hw->subsystem_device_id = pdev->subsystem_device;
2470         hw->bus.device = PCI_SLOT(pdev->devfn);
2471         hw->bus.func = PCI_FUNC(pdev->devfn);
2472
2473         INIT_LIST_HEAD(&adapter->mac_filter_list);
2474         INIT_LIST_HEAD(&adapter->vlan_filter_list);
2475
2476         INIT_WORK(&adapter->reset_task, i40evf_reset_task);
2477         INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
2478         INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
2479         INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
2480         schedule_delayed_work(&adapter->init_task,
2481                               msecs_to_jiffies(5 * (pdev->devfn & 0x07)));
2482
2483         return 0;
2484
2485 err_ioremap:
2486         free_netdev(netdev);
2487 err_alloc_etherdev:
2488         pci_release_regions(pdev);
2489 err_pci_reg:
2490 err_dma:
2491         pci_disable_device(pdev);
2492         return err;
2493 }
2494
2495 #ifdef CONFIG_PM
2496 /**
2497  * i40evf_suspend - Power management suspend routine
2498  * @pdev: PCI device information struct
2499  * @state: unused
2500  *
2501  * Called when the system (VM) is entering sleep/suspend.
2502  **/
2503 static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
2504 {
2505         struct net_device *netdev = pci_get_drvdata(pdev);
2506         struct i40evf_adapter *adapter = netdev_priv(netdev);
2507         int retval = 0;
2508
2509         netif_device_detach(netdev);
2510
2511         if (netif_running(netdev)) {
2512                 rtnl_lock();
2513                 i40evf_down(adapter);
2514                 rtnl_unlock();
2515         }
2516         i40evf_free_misc_irq(adapter);
2517         i40evf_reset_interrupt_capability(adapter);
2518
2519         retval = pci_save_state(pdev);
2520         if (retval)
2521                 return retval;
2522
2523         pci_disable_device(pdev);
2524
2525         return 0;
2526 }
2527
2528 /**
2529  * i40evf_resume - Power management resume routine
2530  * @pdev: PCI device information struct
2531  *
2532  * Called when the system (VM) is resumed from sleep/suspend.
2533  **/
2534 static int i40evf_resume(struct pci_dev *pdev)
2535 {
2536         struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
2537         struct net_device *netdev = adapter->netdev;
2538         u32 err;
2539
2540         pci_set_power_state(pdev, PCI_D0);
2541         pci_restore_state(pdev);
2542         /* pci_restore_state clears dev->state_saved so call
2543          * pci_save_state to restore it.
2544          */
2545         pci_save_state(pdev);
2546
2547         err = pci_enable_device_mem(pdev);
2548         if (err) {
2549                 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
2550                 return err;
2551         }
2552         pci_set_master(pdev);
2553
2554         rtnl_lock();
2555         err = i40evf_set_interrupt_capability(adapter);
2556         if (err) {
2557                 rtnl_unlock();
2558                 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
2559                 return err;
2560         }
2561         err = i40evf_request_misc_irq(adapter);
2562         rtnl_unlock();
2563         if (err) {
2564                 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
2565                 return err;
2566         }
2567
2568         schedule_work(&adapter->reset_task);
2569
2570         netif_device_attach(netdev);
2571
2572         return err;
2573 }
2574
2575 #endif /* CONFIG_PM */
2576 /**
2577  * i40evf_remove - Device Removal Routine
2578  * @pdev: PCI device information struct
2579  *
2580  * i40evf_remove is called by the PCI subsystem to alert the driver
2581  * that it should release a PCI device.  The could be caused by a
2582  * Hot-Plug event, or because the driver is going to be removed from
2583  * memory.
2584  **/
2585 static void i40evf_remove(struct pci_dev *pdev)
2586 {
2587         struct net_device *netdev = pci_get_drvdata(pdev);
2588         struct i40evf_adapter *adapter = netdev_priv(netdev);
2589         struct i40evf_mac_filter *f, *ftmp;
2590         struct i40e_hw *hw = &adapter->hw;
2591
2592         cancel_delayed_work_sync(&adapter->init_task);
2593         cancel_work_sync(&adapter->reset_task);
2594
2595         if (adapter->netdev_registered) {
2596                 unregister_netdev(netdev);
2597                 adapter->netdev_registered = false;
2598         }
2599
2600         /* Shut down all the garbage mashers on the detention level */
2601         adapter->state = __I40EVF_REMOVE;
2602         adapter->aq_required = 0;
2603         i40evf_request_reset(adapter);
2604         msleep(20);
2605         /* If the FW isn't responding, kick it once, but only once. */
2606         if (!i40evf_asq_done(hw)) {
2607                 i40evf_request_reset(adapter);
2608                 msleep(20);
2609         }
2610
2611         if (adapter->msix_entries) {
2612                 i40evf_misc_irq_disable(adapter);
2613                 i40evf_free_misc_irq(adapter);
2614                 i40evf_reset_interrupt_capability(adapter);
2615                 i40evf_free_q_vectors(adapter);
2616         }
2617
2618         if (adapter->watchdog_timer.function)
2619                 del_timer_sync(&adapter->watchdog_timer);
2620
2621         flush_scheduled_work();
2622
2623         if (hw->aq.asq.count)
2624                 i40evf_shutdown_adminq(hw);
2625
2626         iounmap(hw->hw_addr);
2627         pci_release_regions(pdev);
2628
2629         i40evf_free_all_tx_resources(adapter);
2630         i40evf_free_all_rx_resources(adapter);
2631         i40evf_free_queues(adapter);
2632         kfree(adapter->vf_res);
2633         /* If we got removed before an up/down sequence, we've got a filter
2634          * hanging out there that we need to get rid of.
2635          */
2636         list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
2637                 list_del(&f->list);
2638                 kfree(f);
2639         }
2640         list_for_each_entry_safe(f, ftmp, &adapter->vlan_filter_list, list) {
2641                 list_del(&f->list);
2642                 kfree(f);
2643         }
2644
2645         free_netdev(netdev);
2646
2647         pci_disable_pcie_error_reporting(pdev);
2648
2649         pci_disable_device(pdev);
2650 }
2651
2652 static struct pci_driver i40evf_driver = {
2653         .name     = i40evf_driver_name,
2654         .id_table = i40evf_pci_tbl,
2655         .probe    = i40evf_probe,
2656         .remove   = i40evf_remove,
2657 #ifdef CONFIG_PM
2658         .suspend  = i40evf_suspend,
2659         .resume   = i40evf_resume,
2660 #endif
2661         .shutdown = i40evf_shutdown,
2662 };
2663
2664 /**
2665  * i40e_init_module - Driver Registration Routine
2666  *
2667  * i40e_init_module is the first routine called when the driver is
2668  * loaded. All it does is register with the PCI subsystem.
2669  **/
2670 static int __init i40evf_init_module(void)
2671 {
2672         int ret;
2673
2674         pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
2675                 i40evf_driver_version);
2676
2677         pr_info("%s\n", i40evf_copyright);
2678
2679         ret = pci_register_driver(&i40evf_driver);
2680         return ret;
2681 }
2682
2683 module_init(i40evf_init_module);
2684
2685 /**
2686  * i40e_exit_module - Driver Exit Cleanup Routine
2687  *
2688  * i40e_exit_module is called just before the driver is removed
2689  * from memory.
2690  **/
2691 static void __exit i40evf_exit_module(void)
2692 {
2693         pci_unregister_driver(&i40evf_driver);
2694 }
2695
2696 module_exit(i40evf_exit_module);
2697
2698 /* i40evf_main.c */