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

   1 /*******************************************************************************
   2  *
   3  * Intel Ethernet Controller XL710 Family Linux Virtual Function Driver
   4  * Copyright(c) 2013 - 2016 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) 40-10 Gigabit Virtual Function Network Driver";
  36
  37 #define DRV_KERN "-k"
  38
  39 #define DRV_VERSION_MAJOR 1
  40 #define DRV_VERSION_MINOR 6
  41 #define DRV_VERSION_BUILD 16
  42 #define DRV_VERSION __stringify(DRV_VERSION_MAJOR) "." \
  43              __stringify(DRV_VERSION_MINOR) "." \
  44              __stringify(DRV_VERSION_BUILD) \
  45              DRV_KERN
  46 const char i40evf_driver_version[] = DRV_VERSION;
  47 static const char i40evf_copyright[] =
  48         "Copyright (c) 2013 - 2015 Intel Corporation.";
  49
  50 /* i40evf_pci_tbl - PCI Device ID Table
  51  *
  52  * Wildcard entries (PCI_ANY_ID) should come last
  53  * Last entry must be all 0s
  54  *
  55  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  56  *   Class, Class Mask, private data (not used) }
  57  */
  58 static const struct pci_device_id i40evf_pci_tbl[] = {
  59         {PCI_VDEVICE(INTEL, I40E_DEV_ID_VF), 0},
  60         {PCI_VDEVICE(INTEL, I40E_DEV_ID_VF_HV), 0},
  61         {PCI_VDEVICE(INTEL, I40E_DEV_ID_X722_VF), 0},
  62         {PCI_VDEVICE(INTEL, I40E_DEV_ID_X722_VF_HV), 0},
  63         /* required last entry */
  64         {0, }
  65 };
  66
  67 MODULE_DEVICE_TABLE(pci, i40evf_pci_tbl);
  68
  69 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
  70 MODULE_DESCRIPTION("Intel(R) XL710 X710 Virtual Function Network Driver");
  71 MODULE_LICENSE("GPL");
  72 MODULE_VERSION(DRV_VERSION);
  73
  74 static struct workqueue_struct *i40evf_wq;
  75
  76 /**
  77  * i40evf_allocate_dma_mem_d - OS specific memory alloc for shared code
  78  * @hw:   pointer to the HW structure
  79  * @mem:  ptr to mem struct to fill out
  80  * @size: size of memory requested
  81  * @alignment: what to align the allocation to
  82  **/
  83 i40e_status i40evf_allocate_dma_mem_d(struct i40e_hw *hw,
  84                                       struct i40e_dma_mem *mem,
  85                                       u64 size, u32 alignment)
  86 {
  87         struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
  88
  89         if (!mem)
  90                 return I40E_ERR_PARAM;
  91
  92         mem->size = ALIGN(size, alignment);
  93         mem->va = dma_alloc_coherent(&adapter->pdev->dev, mem->size,
  94                                      (dma_addr_t *)&mem->pa, GFP_KERNEL);
  95         if (mem->va)
  96                 return 0;
  97         else
  98                 return I40E_ERR_NO_MEMORY;
  99 }
 100
 101 /**
 102  * i40evf_free_dma_mem_d - OS specific memory free for shared code
 103  * @hw:   pointer to the HW structure
 104  * @mem:  ptr to mem struct to free
 105  **/
 106 i40e_status i40evf_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem)
 107 {
 108         struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
 109
 110         if (!mem || !mem->va)
 111                 return I40E_ERR_PARAM;
 112         dma_free_coherent(&adapter->pdev->dev, mem->size,
 113                           mem->va, (dma_addr_t)mem->pa);
 114         return 0;
 115 }
 116
 117 /**
 118  * i40evf_allocate_virt_mem_d - OS specific memory alloc for shared code
 119  * @hw:   pointer to the HW structure
 120  * @mem:  ptr to mem struct to fill out
 121  * @size: size of memory requested
 122  **/
 123 i40e_status i40evf_allocate_virt_mem_d(struct i40e_hw *hw,
 124                                        struct i40e_virt_mem *mem, u32 size)
 125 {
 126         if (!mem)
 127                 return I40E_ERR_PARAM;
 128
 129         mem->size = size;
 130         mem->va = kzalloc(size, GFP_KERNEL);
 131
 132         if (mem->va)
 133                 return 0;
 134         else
 135                 return I40E_ERR_NO_MEMORY;
 136 }
 137
 138 /**
 139  * i40evf_free_virt_mem_d - OS specific memory free for shared code
 140  * @hw:   pointer to the HW structure
 141  * @mem:  ptr to mem struct to free
 142  **/
 143 i40e_status i40evf_free_virt_mem_d(struct i40e_hw *hw,
 144                                    struct i40e_virt_mem *mem)
 145 {
 146         if (!mem)
 147                 return I40E_ERR_PARAM;
 148
 149         /* it's ok to kfree a NULL pointer */
 150         kfree(mem->va);
 151
 152         return 0;
 153 }
 154
 155 /**
 156  * i40evf_debug_d - OS dependent version of debug printing
 157  * @hw:  pointer to the HW structure
 158  * @mask: debug level mask
 159  * @fmt_str: printf-type format description
 160  **/
 161 void i40evf_debug_d(void *hw, u32 mask, char *fmt_str, ...)
 162 {
 163         char buf[512];
 164         va_list argptr;
 165
 166         if (!(mask & ((struct i40e_hw *)hw)->debug_mask))
 167                 return;
 168
 169         va_start(argptr, fmt_str);
 170         vsnprintf(buf, sizeof(buf), fmt_str, argptr);
 171         va_end(argptr);
 172
 173         /* the debug string is already formatted with a newline */
 174         pr_info("%s", buf);
 175 }
 176
 177 /**
 178  * i40evf_schedule_reset - Set the flags and schedule a reset event
 179  * @adapter: board private structure
 180  **/
 181 void i40evf_schedule_reset(struct i40evf_adapter *adapter)
 182 {
 183         if (!(adapter->flags &
 184               (I40EVF_FLAG_RESET_PENDING | I40EVF_FLAG_RESET_NEEDED))) {
 185                 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
 186                 schedule_work(&adapter->reset_task);
 187         }
 188 }
 189
 190 /**
 191  * i40evf_tx_timeout - Respond to a Tx Hang
 192  * @netdev: network interface device structure
 193  **/
 194 static void i40evf_tx_timeout(struct net_device *netdev)
 195 {
 196         struct i40evf_adapter *adapter = netdev_priv(netdev);
 197
 198         adapter->tx_timeout_count++;
 199         i40evf_schedule_reset(adapter);
 200 }
 201
 202 /**
 203  * i40evf_misc_irq_disable - Mask off interrupt generation on the NIC
 204  * @adapter: board private structure
 205  **/
 206 static void i40evf_misc_irq_disable(struct i40evf_adapter *adapter)
 207 {
 208         struct i40e_hw *hw = &adapter->hw;
 209
 210         wr32(hw, I40E_VFINT_DYN_CTL01, 0);
 211
 212         /* read flush */
 213         rd32(hw, I40E_VFGEN_RSTAT);
 214
 215         synchronize_irq(adapter->msix_entries[0].vector);
 216 }
 217
 218 /**
 219  * i40evf_misc_irq_enable - Enable default interrupt generation settings
 220  * @adapter: board private structure
 221  **/
 222 static void i40evf_misc_irq_enable(struct i40evf_adapter *adapter)
 223 {
 224         struct i40e_hw *hw = &adapter->hw;
 225
 226         wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK |
 227                                        I40E_VFINT_DYN_CTL01_ITR_INDX_MASK);
 228         wr32(hw, I40E_VFINT_ICR0_ENA1, I40E_VFINT_ICR0_ENA1_ADMINQ_MASK);
 229
 230         /* read flush */
 231         rd32(hw, I40E_VFGEN_RSTAT);
 232 }
 233
 234 /**
 235  * i40evf_irq_disable - Mask off interrupt generation on the NIC
 236  * @adapter: board private structure
 237  **/
 238 static void i40evf_irq_disable(struct i40evf_adapter *adapter)
 239 {
 240         int i;
 241         struct i40e_hw *hw = &adapter->hw;
 242
 243         if (!adapter->msix_entries)
 244                 return;
 245
 246         for (i = 1; i < adapter->num_msix_vectors; i++) {
 247                 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), 0);
 248                 synchronize_irq(adapter->msix_entries[i].vector);
 249         }
 250         /* read flush */
 251         rd32(hw, I40E_VFGEN_RSTAT);
 252 }
 253
 254 /**
 255  * i40evf_irq_enable_queues - Enable interrupt for specified queues
 256  * @adapter: board private structure
 257  * @mask: bitmap of queues to enable
 258  **/
 259 void i40evf_irq_enable_queues(struct i40evf_adapter *adapter, u32 mask)
 260 {
 261         struct i40e_hw *hw = &adapter->hw;
 262         int i;
 263
 264         for (i = 1; i < adapter->num_msix_vectors; i++) {
 265                 if (mask & BIT(i - 1)) {
 266                         wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1),
 267                              I40E_VFINT_DYN_CTLN1_INTENA_MASK |
 268                              I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
 269                              I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK);
 270                 }
 271         }
 272 }
 273
 274 /**
 275  * i40evf_fire_sw_int - Generate SW interrupt for specified vectors
 276  * @adapter: board private structure
 277  * @mask: bitmap of vectors to trigger
 278  **/
 279 static void i40evf_fire_sw_int(struct i40evf_adapter *adapter, u32 mask)
 280 {
 281         struct i40e_hw *hw = &adapter->hw;
 282         int i;
 283         u32 dyn_ctl;
 284
 285         if (mask & 1) {
 286                 dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTL01);
 287                 dyn_ctl |= I40E_VFINT_DYN_CTLN1_SWINT_TRIG_MASK |
 288                            I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
 289                            I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK;
 290                 wr32(hw, I40E_VFINT_DYN_CTL01, dyn_ctl);
 291         }
 292         for (i = 1; i < adapter->num_msix_vectors; i++) {
 293                 if (mask & BIT(i)) {
 294                         dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTLN1(i - 1));
 295                         dyn_ctl |= I40E_VFINT_DYN_CTLN1_SWINT_TRIG_MASK |
 296                                    I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
 297                                    I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK;
 298                         wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), dyn_ctl);
 299                 }
 300         }
 301 }
 302
 303 /**
 304  * i40evf_irq_enable - Enable default interrupt generation settings
 305  * @adapter: board private structure
 306  * @flush: boolean value whether to run rd32()
 307  **/
 308 void i40evf_irq_enable(struct i40evf_adapter *adapter, bool flush)
 309 {
 310         struct i40e_hw *hw = &adapter->hw;
 311
 312         i40evf_misc_irq_enable(adapter);
 313         i40evf_irq_enable_queues(adapter, ~0);
 314
 315         if (flush)
 316                 rd32(hw, I40E_VFGEN_RSTAT);
 317 }
 318
 319 /**
 320  * i40evf_msix_aq - Interrupt handler for vector 0
 321  * @irq: interrupt number
 322  * @data: pointer to netdev
 323  **/
 324 static irqreturn_t i40evf_msix_aq(int irq, void *data)
 325 {
 326         struct net_device *netdev = data;
 327         struct i40evf_adapter *adapter = netdev_priv(netdev);
 328         struct i40e_hw *hw = &adapter->hw;
 329         u32 val;
 330
 331         /* handle non-queue interrupts, these reads clear the registers */
 332         val = rd32(hw, I40E_VFINT_ICR01);
 333         val = rd32(hw, I40E_VFINT_ICR0_ENA1);
 334
 335         val = rd32(hw, I40E_VFINT_DYN_CTL01) |
 336               I40E_VFINT_DYN_CTL01_CLEARPBA_MASK;
 337         wr32(hw, I40E_VFINT_DYN_CTL01, val);
 338
 339         /* schedule work on the private workqueue */
 340         schedule_work(&adapter->adminq_task);
 341
 342         return IRQ_HANDLED;
 343 }
 344
 345 /**
 346  * i40evf_msix_clean_rings - MSIX mode Interrupt Handler
 347  * @irq: interrupt number
 348  * @data: pointer to a q_vector
 349  **/
 350 static irqreturn_t i40evf_msix_clean_rings(int irq, void *data)
 351 {
 352         struct i40e_q_vector *q_vector = data;
 353
 354         if (!q_vector->tx.ring && !q_vector->rx.ring)
 355                 return IRQ_HANDLED;
 356
 357         napi_schedule_irqoff(&q_vector->napi);
 358
 359         return IRQ_HANDLED;
 360 }
 361
 362 /**
 363  * i40evf_map_vector_to_rxq - associate irqs with rx queues
 364  * @adapter: board private structure
 365  * @v_idx: interrupt number
 366  * @r_idx: queue number
 367  **/
 368 static void
 369 i40evf_map_vector_to_rxq(struct i40evf_adapter *adapter, int v_idx, int r_idx)
 370 {
 371         struct i40e_q_vector *q_vector = &adapter->q_vectors[v_idx];
 372         struct i40e_ring *rx_ring = &adapter->rx_rings[r_idx];
 373         struct i40e_hw *hw = &adapter->hw;
 374
 375         rx_ring->q_vector = q_vector;
 376         rx_ring->next = q_vector->rx.ring;
 377         rx_ring->vsi = &adapter->vsi;
 378         q_vector->rx.ring = rx_ring;
 379         q_vector->rx.count++;
 380         q_vector->rx.latency_range = I40E_LOW_LATENCY;
 381         q_vector->rx.itr = ITR_TO_REG(rx_ring->rx_itr_setting);
 382         q_vector->ring_mask |= BIT(r_idx);
 383         q_vector->itr_countdown = ITR_COUNTDOWN_START;
 384         wr32(hw, I40E_VFINT_ITRN1(I40E_RX_ITR, v_idx - 1), q_vector->rx.itr);
 385 }
 386
 387 /**
 388  * i40evf_map_vector_to_txq - associate irqs with tx queues
 389  * @adapter: board private structure
 390  * @v_idx: interrupt number
 391  * @t_idx: queue number
 392  **/
 393 static void
 394 i40evf_map_vector_to_txq(struct i40evf_adapter *adapter, int v_idx, int t_idx)
 395 {
 396         struct i40e_q_vector *q_vector = &adapter->q_vectors[v_idx];
 397         struct i40e_ring *tx_ring = &adapter->tx_rings[t_idx];
 398         struct i40e_hw *hw = &adapter->hw;
 399
 400         tx_ring->q_vector = q_vector;
 401         tx_ring->next = q_vector->tx.ring;
 402         tx_ring->vsi = &adapter->vsi;
 403         q_vector->tx.ring = tx_ring;
 404         q_vector->tx.count++;
 405         q_vector->tx.latency_range = I40E_LOW_LATENCY;
 406         q_vector->tx.itr = ITR_TO_REG(tx_ring->tx_itr_setting);
 407         q_vector->itr_countdown = ITR_COUNTDOWN_START;
 408         q_vector->num_ringpairs++;
 409         wr32(hw, I40E_VFINT_ITRN1(I40E_TX_ITR, v_idx - 1), q_vector->tx.itr);
 410 }
 411
 412 /**
 413  * i40evf_map_rings_to_vectors - Maps descriptor rings to vectors
 414  * @adapter: board private structure to initialize
 415  *
 416  * This function maps descriptor rings to the queue-specific vectors
 417  * we were allotted through the MSI-X enabling code.  Ideally, we'd have
 418  * one vector per ring/queue, but on a constrained vector budget, we
 419  * group the rings as "efficiently" as possible.  You would add new
 420  * mapping configurations in here.
 421  **/
 422 static int i40evf_map_rings_to_vectors(struct i40evf_adapter *adapter)
 423 {
 424         int q_vectors;
 425         int v_start = 0;
 426         int rxr_idx = 0, txr_idx = 0;
 427         int rxr_remaining = adapter->num_active_queues;
 428         int txr_remaining = adapter->num_active_queues;
 429         int i, j;
 430         int rqpv, tqpv;
 431         int err = 0;
 432
 433         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 434
 435         /* The ideal configuration...
 436          * We have enough vectors to map one per queue.
 437          */
 438         if (q_vectors >= (rxr_remaining * 2)) {
 439                 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
 440                         i40evf_map_vector_to_rxq(adapter, v_start, rxr_idx);
 441
 442                 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
 443                         i40evf_map_vector_to_txq(adapter, v_start, txr_idx);
 444                 goto out;
 445         }
 446
 447         /* If we don't have enough vectors for a 1-to-1
 448          * mapping, we'll have to group them so there are
 449          * multiple queues per vector.
 450          * Re-adjusting *qpv takes care of the remainder.
 451          */
 452         for (i = v_start; i < q_vectors; i++) {
 453                 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
 454                 for (j = 0; j < rqpv; j++) {
 455                         i40evf_map_vector_to_rxq(adapter, i, rxr_idx);
 456                         rxr_idx++;
 457                         rxr_remaining--;
 458                 }
 459         }
 460         for (i = v_start; i < q_vectors; i++) {
 461                 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
 462                 for (j = 0; j < tqpv; j++) {
 463                         i40evf_map_vector_to_txq(adapter, i, txr_idx);
 464                         txr_idx++;
 465                         txr_remaining--;
 466                 }
 467         }
 468
 469 out:
 470         adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
 471
 472         return err;
 473 }
 474
 475 #ifdef CONFIG_NET_POLL_CONTROLLER
 476 /**
 477  * i40evf_netpoll - A Polling 'interrupt' handler
 478  * @netdev: network interface device structure
 479  *
 480  * This is used by netconsole to send skbs without having to re-enable
 481  * interrupts.  It's not called while the normal interrupt routine is executing.
 482  **/
 483 static void i40evf_netpoll(struct net_device *netdev)
 484 {
 485         struct i40evf_adapter *adapter = netdev_priv(netdev);
 486         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 487         int i;
 488
 489         /* if interface is down do nothing */
 490         if (test_bit(__I40E_DOWN, &adapter->vsi.state))
 491                 return;
 492
 493         for (i = 0; i < q_vectors; i++)
 494                 i40evf_msix_clean_rings(0, &adapter->q_vectors[i]);
 495 }
 496
 497 #endif
 498 /**
 499  * i40evf_request_traffic_irqs - Initialize MSI-X interrupts
 500  * @adapter: board private structure
 501  *
 502  * Allocates MSI-X vectors for tx and rx handling, and requests
 503  * interrupts from the kernel.
 504  **/
 505 static int
 506 i40evf_request_traffic_irqs(struct i40evf_adapter *adapter, char *basename)
 507 {
 508         int vector, err, q_vectors;
 509         int rx_int_idx = 0, tx_int_idx = 0;
 510
 511         i40evf_irq_disable(adapter);
 512         /* Decrement for Other and TCP Timer vectors */
 513         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 514
 515         for (vector = 0; vector < q_vectors; vector++) {
 516                 struct i40e_q_vector *q_vector = &adapter->q_vectors[vector];
 517
 518                 if (q_vector->tx.ring && q_vector->rx.ring) {
 519                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 520                                  "i40evf-%s-%s-%d", basename,
 521                                  "TxRx", rx_int_idx++);
 522                         tx_int_idx++;
 523                 } else if (q_vector->rx.ring) {
 524                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 525                                  "i40evf-%s-%s-%d", basename,
 526                                  "rx", rx_int_idx++);
 527                 } else if (q_vector->tx.ring) {
 528                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 529                                  "i40evf-%s-%s-%d", basename,
 530                                  "tx", tx_int_idx++);
 531                 } else {
 532                         /* skip this unused q_vector */
 533                         continue;
 534                 }
 535                 err = request_irq(
 536                         adapter->msix_entries[vector + NONQ_VECS].vector,
 537                         i40evf_msix_clean_rings,
 538                         0,
 539                         q_vector->name,
 540                         q_vector);
 541                 if (err) {
 542                         dev_info(&adapter->pdev->dev,
 543                                  "Request_irq failed, error: %d\n", err);
 544                         goto free_queue_irqs;
 545                 }
 546                 /* assign the mask for this irq */
 547                 irq_set_affinity_hint(
 548                         adapter->msix_entries[vector + NONQ_VECS].vector,
 549                         q_vector->affinity_mask);
 550         }
 551
 552         return 0;
 553
 554 free_queue_irqs:
 555         while (vector) {
 556                 vector--;
 557                 irq_set_affinity_hint(
 558                         adapter->msix_entries[vector + NONQ_VECS].vector,
 559                         NULL);
 560                 free_irq(adapter->msix_entries[vector + NONQ_VECS].vector,
 561                          &adapter->q_vectors[vector]);
 562         }
 563         return err;
 564 }
 565
 566 /**
 567  * i40evf_request_misc_irq - Initialize MSI-X interrupts
 568  * @adapter: board private structure
 569  *
 570  * Allocates MSI-X vector 0 and requests interrupts from the kernel. This
 571  * vector is only for the admin queue, and stays active even when the netdev
 572  * is closed.
 573  **/
 574 static int i40evf_request_misc_irq(struct i40evf_adapter *adapter)
 575 {
 576         struct net_device *netdev = adapter->netdev;
 577         int err;
 578
 579         snprintf(adapter->misc_vector_name,
 580                  sizeof(adapter->misc_vector_name) - 1, "i40evf-%s:mbx",
 581                  dev_name(&adapter->pdev->dev));
 582         err = request_irq(adapter->msix_entries[0].vector,
 583                           &i40evf_msix_aq, 0,
 584                           adapter->misc_vector_name, netdev);
 585         if (err) {
 586                 dev_err(&adapter->pdev->dev,
 587                         "request_irq for %s failed: %d\n",
 588                         adapter->misc_vector_name, err);
 589                 free_irq(adapter->msix_entries[0].vector, netdev);
 590         }
 591         return err;
 592 }
 593
 594 /**
 595  * i40evf_free_traffic_irqs - Free MSI-X interrupts
 596  * @adapter: board private structure
 597  *
 598  * Frees all MSI-X vectors other than 0.
 599  **/
 600 static void i40evf_free_traffic_irqs(struct i40evf_adapter *adapter)
 601 {
 602         int i;
 603         int q_vectors;
 604
 605         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 606
 607         for (i = 0; i < q_vectors; i++) {
 608                 irq_set_affinity_hint(adapter->msix_entries[i+1].vector,
 609                                       NULL);
 610                 free_irq(adapter->msix_entries[i+1].vector,
 611                          &adapter->q_vectors[i]);
 612         }
 613 }
 614
 615 /**
 616  * i40evf_free_misc_irq - Free MSI-X miscellaneous vector
 617  * @adapter: board private structure
 618  *
 619  * Frees MSI-X vector 0.
 620  **/
 621 static void i40evf_free_misc_irq(struct i40evf_adapter *adapter)
 622 {
 623         struct net_device *netdev = adapter->netdev;
 624
 625         free_irq(adapter->msix_entries[0].vector, netdev);
 626 }
 627
 628 /**
 629  * i40evf_configure_tx - Configure Transmit Unit after Reset
 630  * @adapter: board private structure
 631  *
 632  * Configure the Tx unit of the MAC after a reset.
 633  **/
 634 static void i40evf_configure_tx(struct i40evf_adapter *adapter)
 635 {
 636         struct i40e_hw *hw = &adapter->hw;
 637         int i;
 638
 639         for (i = 0; i < adapter->num_active_queues; i++)
 640                 adapter->tx_rings[i].tail = hw->hw_addr + I40E_QTX_TAIL1(i);
 641 }
 642
 643 /**
 644  * i40evf_configure_rx - Configure Receive Unit after Reset
 645  * @adapter: board private structure
 646  *
 647  * Configure the Rx unit of the MAC after a reset.
 648  **/
 649 static void i40evf_configure_rx(struct i40evf_adapter *adapter)
 650 {
 651         struct i40e_hw *hw = &adapter->hw;
 652         int i;
 653
 654         for (i = 0; i < adapter->num_active_queues; i++) {
 655                 adapter->rx_rings[i].tail = hw->hw_addr + I40E_QRX_TAIL1(i);
 656                 adapter->rx_rings[i].rx_buf_len = I40EVF_RXBUFFER_2048;
 657         }
 658 }
 659
 660 /**
 661  * i40evf_find_vlan - Search filter list for specific vlan filter
 662  * @adapter: board private structure
 663  * @vlan: vlan tag
 664  *
 665  * Returns ptr to the filter object or NULL
 666  **/
 667 static struct
 668 i40evf_vlan_filter *i40evf_find_vlan(struct i40evf_adapter *adapter, u16 vlan)
 669 {
 670         struct i40evf_vlan_filter *f;
 671
 672         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
 673                 if (vlan == f->vlan)
 674                         return f;
 675         }
 676         return NULL;
 677 }
 678
 679 /**
 680  * i40evf_add_vlan - Add a vlan filter to the list
 681  * @adapter: board private structure
 682  * @vlan: VLAN tag
 683  *
 684  * Returns ptr to the filter object or NULL when no memory available.
 685  **/
 686 static struct
 687 i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan)
 688 {
 689         struct i40evf_vlan_filter *f = NULL;
 690         int count = 50;
 691
 692         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 693                                 &adapter->crit_section)) {
 694                 udelay(1);
 695                 if (--count == 0)
 696                         goto out;
 697         }
 698
 699         f = i40evf_find_vlan(adapter, vlan);
 700         if (!f) {
 701                 f = kzalloc(sizeof(*f), GFP_ATOMIC);
 702                 if (!f)
 703                         goto clearout;
 704
 705                 f->vlan = vlan;
 706
 707                 INIT_LIST_HEAD(&f->list);
 708                 list_add(&f->list, &adapter->vlan_filter_list);
 709                 f->add = true;
 710                 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
 711         }
 712
 713 clearout:
 714         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 715 out:
 716         return f;
 717 }
 718
 719 /**
 720  * i40evf_del_vlan - Remove a vlan filter from the list
 721  * @adapter: board private structure
 722  * @vlan: VLAN tag
 723  **/
 724 static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan)
 725 {
 726         struct i40evf_vlan_filter *f;
 727         int count = 50;
 728
 729         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 730                                 &adapter->crit_section)) {
 731                 udelay(1);
 732                 if (--count == 0)
 733                         return;
 734         }
 735
 736         f = i40evf_find_vlan(adapter, vlan);
 737         if (f) {
 738                 f->remove = true;
 739                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
 740         }
 741         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 742 }
 743
 744 /**
 745  * i40evf_vlan_rx_add_vid - Add a VLAN filter to a device
 746  * @netdev: network device struct
 747  * @vid: VLAN tag
 748  **/
 749 static int i40evf_vlan_rx_add_vid(struct net_device *netdev,
 750                                   __always_unused __be16 proto, u16 vid)
 751 {
 752         struct i40evf_adapter *adapter = netdev_priv(netdev);
 753
 754         if (!VLAN_ALLOWED(adapter))
 755                 return -EIO;
 756         if (i40evf_add_vlan(adapter, vid) == NULL)
 757                 return -ENOMEM;
 758         return 0;
 759 }
 760
 761 /**
 762  * i40evf_vlan_rx_kill_vid - Remove a VLAN filter from a device
 763  * @netdev: network device struct
 764  * @vid: VLAN tag
 765  **/
 766 static int i40evf_vlan_rx_kill_vid(struct net_device *netdev,
 767                                    __always_unused __be16 proto, u16 vid)
 768 {
 769         struct i40evf_adapter *adapter = netdev_priv(netdev);
 770
 771         if (VLAN_ALLOWED(adapter)) {
 772                 i40evf_del_vlan(adapter, vid);
 773                 return 0;
 774         }
 775         return -EIO;
 776 }
 777
 778 /**
 779  * i40evf_find_filter - Search filter list for specific mac filter
 780  * @adapter: board private structure
 781  * @macaddr: the MAC address
 782  *
 783  * Returns ptr to the filter object or NULL
 784  **/
 785 static struct
 786 i40evf_mac_filter *i40evf_find_filter(struct i40evf_adapter *adapter,
 787                                       u8 *macaddr)
 788 {
 789         struct i40evf_mac_filter *f;
 790
 791         if (!macaddr)
 792                 return NULL;
 793
 794         list_for_each_entry(f, &adapter->mac_filter_list, list) {
 795                 if (ether_addr_equal(macaddr, f->macaddr))
 796                         return f;
 797         }
 798         return NULL;
 799 }
 800
 801 /**
 802  * i40e_add_filter - Add a mac filter to the filter list
 803  * @adapter: board private structure
 804  * @macaddr: the MAC address
 805  *
 806  * Returns ptr to the filter object or NULL when no memory available.
 807  **/
 808 static struct
 809 i40evf_mac_filter *i40evf_add_filter(struct i40evf_adapter *adapter,
 810                                      u8 *macaddr)
 811 {
 812         struct i40evf_mac_filter *f;
 813         int count = 50;
 814
 815         if (!macaddr)
 816                 return NULL;
 817
 818         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 819                                 &adapter->crit_section)) {
 820                 udelay(1);
 821                 if (--count == 0)
 822                         return NULL;
 823         }
 824
 825         f = i40evf_find_filter(adapter, macaddr);
 826         if (!f) {
 827                 f = kzalloc(sizeof(*f), GFP_ATOMIC);
 828                 if (!f) {
 829                         clear_bit(__I40EVF_IN_CRITICAL_TASK,
 830                                   &adapter->crit_section);
 831                         return NULL;
 832                 }
 833
 834                 ether_addr_copy(f->macaddr, macaddr);
 835
 836                 list_add_tail(&f->list, &adapter->mac_filter_list);
 837                 f->add = true;
 838                 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
 839         }
 840
 841         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 842         return f;
 843 }
 844
 845 /**
 846  * i40evf_set_mac - NDO callback to set port mac address
 847  * @netdev: network interface device structure
 848  * @p: pointer to an address structure
 849  *
 850  * Returns 0 on success, negative on failure
 851  **/
 852 static int i40evf_set_mac(struct net_device *netdev, void *p)
 853 {
 854         struct i40evf_adapter *adapter = netdev_priv(netdev);
 855         struct i40e_hw *hw = &adapter->hw;
 856         struct i40evf_mac_filter *f;
 857         struct sockaddr *addr = p;
 858
 859         if (!is_valid_ether_addr(addr->sa_data))
 860                 return -EADDRNOTAVAIL;
 861
 862         if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
 863                 return 0;
 864
 865         if (adapter->flags & I40EVF_FLAG_ADDR_SET_BY_PF)
 866                 return -EPERM;
 867
 868         f = i40evf_find_filter(adapter, hw->mac.addr);
 869         if (f) {
 870                 f->remove = true;
 871                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
 872         }
 873
 874         f = i40evf_add_filter(adapter, addr->sa_data);
 875         if (f) {
 876                 ether_addr_copy(hw->mac.addr, addr->sa_data);
 877                 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
 878         }
 879
 880         return (f == NULL) ? -ENOMEM : 0;
 881 }
 882
 883 /**
 884  * i40evf_set_rx_mode - NDO callback to set the netdev filters
 885  * @netdev: network interface device structure
 886  **/
 887 static void i40evf_set_rx_mode(struct net_device *netdev)
 888 {
 889         struct i40evf_adapter *adapter = netdev_priv(netdev);
 890         struct i40evf_mac_filter *f, *ftmp;
 891         struct netdev_hw_addr *uca;
 892         struct netdev_hw_addr *mca;
 893         struct netdev_hw_addr *ha;
 894         int count = 50;
 895
 896         /* add addr if not already in the filter list */
 897         netdev_for_each_uc_addr(uca, netdev) {
 898                 i40evf_add_filter(adapter, uca->addr);
 899         }
 900         netdev_for_each_mc_addr(mca, netdev) {
 901                 i40evf_add_filter(adapter, mca->addr);
 902         }
 903
 904         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 905                                 &adapter->crit_section)) {
 906                 udelay(1);
 907                 if (--count == 0) {
 908                         dev_err(&adapter->pdev->dev,
 909                                 "Failed to get lock in %s\n", __func__);
 910                         return;
 911                 }
 912         }
 913         /* remove filter if not in netdev list */
 914         list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
 915                 netdev_for_each_mc_addr(mca, netdev)
 916                         if (ether_addr_equal(mca->addr, f->macaddr))
 917                                 goto bottom_of_search_loop;
 918
 919                 netdev_for_each_uc_addr(uca, netdev)
 920                         if (ether_addr_equal(uca->addr, f->macaddr))
 921                                 goto bottom_of_search_loop;
 922
 923                 for_each_dev_addr(netdev, ha)
 924                         if (ether_addr_equal(ha->addr, f->macaddr))
 925                                 goto bottom_of_search_loop;
 926
 927                 if (ether_addr_equal(f->macaddr, adapter->hw.mac.addr))
 928                         goto bottom_of_search_loop;
 929
 930                 /* f->macaddr wasn't found in uc, mc, or ha list so delete it */
 931                 f->remove = true;
 932                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
 933
 934 bottom_of_search_loop:
 935                 continue;
 936         }
 937
 938         if (netdev->flags & IFF_PROMISC &&
 939             !(adapter->flags & I40EVF_FLAG_PROMISC_ON))
 940                 adapter->aq_required |= I40EVF_FLAG_AQ_REQUEST_PROMISC;
 941         else if (!(netdev->flags & IFF_PROMISC) &&
 942                  adapter->flags & I40EVF_FLAG_PROMISC_ON)
 943                 adapter->aq_required |= I40EVF_FLAG_AQ_RELEASE_PROMISC;
 944
 945         if (netdev->flags & IFF_ALLMULTI &&
 946             !(adapter->flags & I40EVF_FLAG_ALLMULTI_ON))
 947                 adapter->aq_required |= I40EVF_FLAG_AQ_REQUEST_ALLMULTI;
 948         else if (!(netdev->flags & IFF_ALLMULTI) &&
 949                  adapter->flags & I40EVF_FLAG_ALLMULTI_ON)
 950                 adapter->aq_required |= I40EVF_FLAG_AQ_RELEASE_ALLMULTI;
 951
 952         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 953 }
 954
 955 /**
 956  * i40evf_napi_enable_all - enable NAPI on all queue vectors
 957  * @adapter: board private structure
 958  **/
 959 static void i40evf_napi_enable_all(struct i40evf_adapter *adapter)
 960 {
 961         int q_idx;
 962         struct i40e_q_vector *q_vector;
 963         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 964
 965         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
 966                 struct napi_struct *napi;
 967
 968                 q_vector = &adapter->q_vectors[q_idx];
 969                 napi = &q_vector->napi;
 970                 napi_enable(napi);
 971         }
 972 }
 973
 974 /**
 975  * i40evf_napi_disable_all - disable NAPI on all queue vectors
 976  * @adapter: board private structure
 977  **/
 978 static void i40evf_napi_disable_all(struct i40evf_adapter *adapter)
 979 {
 980         int q_idx;
 981         struct i40e_q_vector *q_vector;
 982         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 983
 984         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
 985                 q_vector = &adapter->q_vectors[q_idx];
 986                 napi_disable(&q_vector->napi);
 987         }
 988 }
 989
 990 /**
 991  * i40evf_configure - set up transmit and receive data structures
 992  * @adapter: board private structure
 993  **/
 994 static void i40evf_configure(struct i40evf_adapter *adapter)
 995 {
 996         struct net_device *netdev = adapter->netdev;
 997         int i;
 998
 999         i40evf_set_rx_mode(netdev);
1000
1001         i40evf_configure_tx(adapter);
1002         i40evf_configure_rx(adapter);
1003         adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
1004
1005         for (i = 0; i < adapter->num_active_queues; i++) {
1006                 struct i40e_ring *ring = &adapter->rx_rings[i];
1007
1008                 i40evf_alloc_rx_buffers(ring, I40E_DESC_UNUSED(ring));
1009         }
1010 }
1011
1012 /**
1013  * i40evf_up_complete - Finish the last steps of bringing up a connection
1014  * @adapter: board private structure
1015  **/
1016 static void i40evf_up_complete(struct i40evf_adapter *adapter)
1017 {
1018         adapter->state = __I40EVF_RUNNING;
1019         clear_bit(__I40E_DOWN, &adapter->vsi.state);
1020
1021         i40evf_napi_enable_all(adapter);
1022
1023         adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES;
1024         mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
1025 }
1026
1027 /**
1028  * i40e_down - Shutdown the connection processing
1029  * @adapter: board private structure
1030  **/
1031 void i40evf_down(struct i40evf_adapter *adapter)
1032 {
1033         struct net_device *netdev = adapter->netdev;
1034         struct i40evf_mac_filter *f;
1035
1036         if (adapter->state <= __I40EVF_DOWN_PENDING)
1037                 return;
1038
1039         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1040                                 &adapter->crit_section))
1041                 usleep_range(500, 1000);
1042
1043         netif_carrier_off(netdev);
1044         netif_tx_disable(netdev);
1045         adapter->link_up = false;
1046         i40evf_napi_disable_all(adapter);
1047         i40evf_irq_disable(adapter);
1048
1049         /* remove all MAC filters */
1050         list_for_each_entry(f, &adapter->mac_filter_list, list) {
1051                 f->remove = true;
1052         }
1053         /* remove all VLAN filters */
1054         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
1055                 f->remove = true;
1056         }
1057         if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) &&
1058             adapter->state != __I40EVF_RESETTING) {
1059                 /* cancel any current operation */
1060                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1061                 /* Schedule operations to close down the HW. Don't wait
1062                  * here for this to complete. The watchdog is still running
1063                  * and it will take care of this.
1064                  */
1065                 adapter->aq_required = I40EVF_FLAG_AQ_DEL_MAC_FILTER;
1066                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
1067                 adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
1068         }
1069
1070         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1071 }
1072
1073 /**
1074  * i40evf_acquire_msix_vectors - Setup the MSIX capability
1075  * @adapter: board private structure
1076  * @vectors: number of vectors to request
1077  *
1078  * Work with the OS to set up the MSIX vectors needed.
1079  *
1080  * Returns 0 on success, negative on failure
1081  **/
1082 static int
1083 i40evf_acquire_msix_vectors(struct i40evf_adapter *adapter, int vectors)
1084 {
1085         int err, vector_threshold;
1086
1087         /* We'll want at least 3 (vector_threshold):
1088          * 0) Other (Admin Queue and link, mostly)
1089          * 1) TxQ[0] Cleanup
1090          * 2) RxQ[0] Cleanup
1091          */
1092         vector_threshold = MIN_MSIX_COUNT;
1093
1094         /* The more we get, the more we will assign to Tx/Rx Cleanup
1095          * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1096          * Right now, we simply care about how many we'll get; we'll
1097          * set them up later while requesting irq's.
1098          */
1099         err = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
1100                                     vector_threshold, vectors);
1101         if (err < 0) {
1102                 dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts\n");
1103                 kfree(adapter->msix_entries);
1104                 adapter->msix_entries = NULL;
1105                 return err;
1106         }
1107
1108         /* Adjust for only the vectors we'll use, which is minimum
1109          * of max_msix_q_vectors + NONQ_VECS, or the number of
1110          * vectors we were allocated.
1111          */
1112         adapter->num_msix_vectors = err;
1113         return 0;
1114 }
1115
1116 /**
1117  * i40evf_free_queues - Free memory for all rings
1118  * @adapter: board private structure to initialize
1119  *
1120  * Free all of the memory associated with queue pairs.
1121  **/
1122 static void i40evf_free_queues(struct i40evf_adapter *adapter)
1123 {
1124         if (!adapter->vsi_res)
1125                 return;
1126         kfree(adapter->tx_rings);
1127         adapter->tx_rings = NULL;
1128         kfree(adapter->rx_rings);
1129         adapter->rx_rings = NULL;
1130 }
1131
1132 /**
1133  * i40evf_alloc_queues - Allocate memory for all rings
1134  * @adapter: board private structure to initialize
1135  *
1136  * We allocate one ring per queue at run-time since we don't know the
1137  * number of queues at compile-time.  The polling_netdev array is
1138  * intended for Multiqueue, but should work fine with a single queue.
1139  **/
1140 static int i40evf_alloc_queues(struct i40evf_adapter *adapter)
1141 {
1142         int i;
1143
1144         adapter->tx_rings = kcalloc(adapter->num_active_queues,
1145                                     sizeof(struct i40e_ring), GFP_KERNEL);
1146         if (!adapter->tx_rings)
1147                 goto err_out;
1148         adapter->rx_rings = kcalloc(adapter->num_active_queues,
1149                                     sizeof(struct i40e_ring), GFP_KERNEL);
1150         if (!adapter->rx_rings)
1151                 goto err_out;
1152
1153         for (i = 0; i < adapter->num_active_queues; i++) {
1154                 struct i40e_ring *tx_ring;
1155                 struct i40e_ring *rx_ring;
1156
1157                 tx_ring = &adapter->tx_rings[i];
1158
1159                 tx_ring->queue_index = i;
1160                 tx_ring->netdev = adapter->netdev;
1161                 tx_ring->dev = &adapter->pdev->dev;
1162                 tx_ring->count = adapter->tx_desc_count;
1163                 tx_ring->tx_itr_setting = (I40E_ITR_DYNAMIC | I40E_ITR_TX_DEF);
1164                 if (adapter->flags & I40E_FLAG_WB_ON_ITR_CAPABLE)
1165                         tx_ring->flags |= I40E_TXR_FLAGS_WB_ON_ITR;
1166
1167                 rx_ring = &adapter->rx_rings[i];
1168                 rx_ring->queue_index = i;
1169                 rx_ring->netdev = adapter->netdev;
1170                 rx_ring->dev = &adapter->pdev->dev;
1171                 rx_ring->count = adapter->rx_desc_count;
1172                 rx_ring->rx_itr_setting = (I40E_ITR_DYNAMIC | I40E_ITR_RX_DEF);
1173         }
1174
1175         return 0;
1176
1177 err_out:
1178         i40evf_free_queues(adapter);
1179         return -ENOMEM;
1180 }
1181
1182 /**
1183  * i40evf_set_interrupt_capability - set MSI-X or FAIL if not supported
1184  * @adapter: board private structure to initialize
1185  *
1186  * Attempt to configure the interrupts using the best available
1187  * capabilities of the hardware and the kernel.
1188  **/
1189 static int i40evf_set_interrupt_capability(struct i40evf_adapter *adapter)
1190 {
1191         int vector, v_budget;
1192         int pairs = 0;
1193         int err = 0;
1194
1195         if (!adapter->vsi_res) {
1196                 err = -EIO;
1197                 goto out;
1198         }
1199         pairs = adapter->num_active_queues;
1200
1201         /* It's easy to be greedy for MSI-X vectors, but it really
1202          * doesn't do us much good if we have a lot more vectors
1203          * than CPU's.  So let's be conservative and only ask for
1204          * (roughly) twice the number of vectors as there are CPU's.
1205          */
1206         v_budget = min_t(int, pairs, (int)(num_online_cpus() * 2)) + NONQ_VECS;
1207         v_budget = min_t(int, v_budget, (int)adapter->vf_res->max_vectors);
1208
1209         adapter->msix_entries = kcalloc(v_budget,
1210                                         sizeof(struct msix_entry), GFP_KERNEL);
1211         if (!adapter->msix_entries) {
1212                 err = -ENOMEM;
1213                 goto out;
1214         }
1215
1216         for (vector = 0; vector < v_budget; vector++)
1217                 adapter->msix_entries[vector].entry = vector;
1218
1219         err = i40evf_acquire_msix_vectors(adapter, v_budget);
1220
1221 out:
1222         netif_set_real_num_rx_queues(adapter->netdev, pairs);
1223         netif_set_real_num_tx_queues(adapter->netdev, pairs);
1224         return err;
1225 }
1226
1227 /**
1228  * i40e_config_rss_aq - Configure RSS keys and lut by using AQ commands
1229  * @adapter: board private structure
1230  *
1231  * Return 0 on success, negative on failure
1232  **/
1233 static int i40evf_config_rss_aq(struct i40evf_adapter *adapter)
1234 {
1235         struct i40e_aqc_get_set_rss_key_data *rss_key =
1236                 (struct i40e_aqc_get_set_rss_key_data *)adapter->rss_key;
1237         struct i40e_hw *hw = &adapter->hw;
1238         int ret = 0;
1239
1240         if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
1241                 /* bail because we already have a command pending */
1242                 dev_err(&adapter->pdev->dev, "Cannot configure RSS, command %d pending\n",
1243                         adapter->current_op);
1244                 return -EBUSY;
1245         }
1246
1247         ret = i40evf_aq_set_rss_key(hw, adapter->vsi.id, rss_key);
1248         if (ret) {
1249                 dev_err(&adapter->pdev->dev, "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 ret;
1253
1254         }
1255
1256         ret = i40evf_aq_set_rss_lut(hw, adapter->vsi.id, false,
1257                                     adapter->rss_lut, adapter->rss_lut_size);
1258         if (ret) {
1259                 dev_err(&adapter->pdev->dev, "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         return ret;
1265
1266 }
1267
1268 /**
1269  * i40evf_config_rss_reg - Configure RSS keys and lut by writing registers
1270  * @adapter: board private structure
1271  *
1272  * Returns 0 on success, negative on failure
1273  **/
1274 static int i40evf_config_rss_reg(struct i40evf_adapter *adapter)
1275 {
1276         struct i40e_hw *hw = &adapter->hw;
1277         u32 *dw;
1278         u16 i;
1279
1280         dw = (u32 *)adapter->rss_key;
1281         for (i = 0; i <= adapter->rss_key_size / 4; i++)
1282                 wr32(hw, I40E_VFQF_HKEY(i), dw[i]);
1283
1284         dw = (u32 *)adapter->rss_lut;
1285         for (i = 0; i <= adapter->rss_lut_size / 4; i++)
1286                 wr32(hw, I40E_VFQF_HLUT(i), dw[i]);
1287
1288         i40e_flush(hw);
1289
1290         return 0;
1291 }
1292
1293 /**
1294  * i40evf_config_rss - Configure RSS keys and lut
1295  * @adapter: board private structure
1296  *
1297  * Returns 0 on success, negative on failure
1298  **/
1299 int i40evf_config_rss(struct i40evf_adapter *adapter)
1300 {
1301
1302         if (RSS_PF(adapter)) {
1303                 adapter->aq_required |= I40EVF_FLAG_AQ_SET_RSS_LUT |
1304                                         I40EVF_FLAG_AQ_SET_RSS_KEY;
1305                 return 0;
1306         } else if (RSS_AQ(adapter)) {
1307                 return i40evf_config_rss_aq(adapter);
1308         } else {
1309                 return i40evf_config_rss_reg(adapter);
1310         }
1311 }
1312
1313 /**
1314  * i40evf_fill_rss_lut - Fill the lut with default values
1315  * @adapter: board private structure
1316  **/
1317 static void i40evf_fill_rss_lut(struct i40evf_adapter *adapter)
1318 {
1319         u16 i;
1320
1321         for (i = 0; i < adapter->rss_lut_size; i++)
1322                 adapter->rss_lut[i] = i % adapter->num_active_queues;
1323 }
1324
1325 /**
1326  * i40evf_init_rss - Prepare for RSS
1327  * @adapter: board private structure
1328  *
1329  * Return 0 on success, negative on failure
1330  **/
1331 static int i40evf_init_rss(struct i40evf_adapter *adapter)
1332 {
1333         struct i40e_hw *hw = &adapter->hw;
1334         int ret;
1335
1336         if (!RSS_PF(adapter)) {
1337                 /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
1338                 if (adapter->vf_res->vf_offload_flags &
1339                     I40E_VIRTCHNL_VF_OFFLOAD_RSS_PCTYPE_V2)
1340                         adapter->hena = I40E_DEFAULT_RSS_HENA_EXPANDED;
1341                 else
1342                         adapter->hena = I40E_DEFAULT_RSS_HENA;
1343
1344                 wr32(hw, I40E_VFQF_HENA(0), (u32)adapter->hena);
1345                 wr32(hw, I40E_VFQF_HENA(1), (u32)(adapter->hena >> 32));
1346         }
1347
1348         i40evf_fill_rss_lut(adapter);
1349
1350         netdev_rss_key_fill((void *)adapter->rss_key, adapter->rss_key_size);
1351         ret = i40evf_config_rss(adapter);
1352
1353         return ret;
1354 }
1355
1356 /**
1357  * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors
1358  * @adapter: board private structure to initialize
1359  *
1360  * We allocate one q_vector per queue interrupt.  If allocation fails we
1361  * return -ENOMEM.
1362  **/
1363 static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
1364 {
1365         int q_idx = 0, num_q_vectors;
1366         struct i40e_q_vector *q_vector;
1367
1368         num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1369         adapter->q_vectors = kcalloc(num_q_vectors, sizeof(*q_vector),
1370                                      GFP_KERNEL);
1371         if (!adapter->q_vectors)
1372                 return -ENOMEM;
1373
1374         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1375                 q_vector = &adapter->q_vectors[q_idx];
1376                 q_vector->adapter = adapter;
1377                 q_vector->vsi = &adapter->vsi;
1378                 q_vector->v_idx = q_idx;
1379                 netif_napi_add(adapter->netdev, &q_vector->napi,
1380                                i40evf_napi_poll, NAPI_POLL_WEIGHT);
1381         }
1382
1383         return 0;
1384 }
1385
1386 /**
1387  * i40evf_free_q_vectors - Free memory allocated for interrupt vectors
1388  * @adapter: board private structure to initialize
1389  *
1390  * This function frees the memory allocated to the q_vectors.  In addition if
1391  * NAPI is enabled it will delete any references to the NAPI struct prior
1392  * to freeing the q_vector.
1393  **/
1394 static void i40evf_free_q_vectors(struct i40evf_adapter *adapter)
1395 {
1396         int q_idx, num_q_vectors;
1397         int napi_vectors;
1398
1399         num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1400         napi_vectors = adapter->num_active_queues;
1401
1402         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1403                 struct i40e_q_vector *q_vector = &adapter->q_vectors[q_idx];
1404                 if (q_idx < napi_vectors)
1405                         netif_napi_del(&q_vector->napi);
1406         }
1407         kfree(adapter->q_vectors);
1408 }
1409
1410 /**
1411  * i40evf_reset_interrupt_capability - Reset MSIX setup
1412  * @adapter: board private structure
1413  *
1414  **/
1415 void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
1416 {
1417         pci_disable_msix(adapter->pdev);
1418         kfree(adapter->msix_entries);
1419         adapter->msix_entries = NULL;
1420 }
1421
1422 /**
1423  * i40evf_init_interrupt_scheme - Determine if MSIX is supported and init
1424  * @adapter: board private structure to initialize
1425  *
1426  **/
1427 int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter)
1428 {
1429         int err;
1430
1431         rtnl_lock();
1432         err = i40evf_set_interrupt_capability(adapter);
1433         rtnl_unlock();
1434         if (err) {
1435                 dev_err(&adapter->pdev->dev,
1436                         "Unable to setup interrupt capabilities\n");
1437                 goto err_set_interrupt;
1438         }
1439
1440         err = i40evf_alloc_q_vectors(adapter);
1441         if (err) {
1442                 dev_err(&adapter->pdev->dev,
1443                         "Unable to allocate memory for queue vectors\n");
1444                 goto err_alloc_q_vectors;
1445         }
1446
1447         err = i40evf_alloc_queues(adapter);
1448         if (err) {
1449                 dev_err(&adapter->pdev->dev,
1450                         "Unable to allocate memory for queues\n");
1451                 goto err_alloc_queues;
1452         }
1453
1454         dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
1455                  (adapter->num_active_queues > 1) ? "Enabled" : "Disabled",
1456                  adapter->num_active_queues);
1457
1458         return 0;
1459 err_alloc_queues:
1460         i40evf_free_q_vectors(adapter);
1461 err_alloc_q_vectors:
1462         i40evf_reset_interrupt_capability(adapter);
1463 err_set_interrupt:
1464         return err;
1465 }
1466
1467 /**
1468  * i40evf_free_rss - Free memory used by RSS structs
1469  * @adapter: board private structure
1470  **/
1471 static void i40evf_free_rss(struct i40evf_adapter *adapter)
1472 {
1473         kfree(adapter->rss_key);
1474         adapter->rss_key = NULL;
1475
1476         kfree(adapter->rss_lut);
1477         adapter->rss_lut = NULL;
1478 }
1479
1480 /**
1481  * i40evf_watchdog_timer - Periodic call-back timer
1482  * @data: pointer to adapter disguised as unsigned long
1483  **/
1484 static void i40evf_watchdog_timer(unsigned long data)
1485 {
1486         struct i40evf_adapter *adapter = (struct i40evf_adapter *)data;
1487
1488         schedule_work(&adapter->watchdog_task);
1489         /* timer will be rescheduled in watchdog task */
1490 }
1491
1492 /**
1493  * i40evf_watchdog_task - Periodic call-back task
1494  * @work: pointer to work_struct
1495  **/
1496 static void i40evf_watchdog_task(struct work_struct *work)
1497 {
1498         struct i40evf_adapter *adapter = container_of(work,
1499                                                       struct i40evf_adapter,
1500                                                       watchdog_task);
1501         struct i40e_hw *hw = &adapter->hw;
1502         u32 reg_val;
1503
1504         if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
1505                 goto restart_watchdog;
1506
1507         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1508                 reg_val = rd32(hw, I40E_VFGEN_RSTAT) &
1509                           I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1510                 if ((reg_val == I40E_VFR_VFACTIVE) ||
1511                     (reg_val == I40E_VFR_COMPLETED)) {
1512                         /* A chance for redemption! */
1513                         dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
1514                         adapter->state = __I40EVF_STARTUP;
1515                         adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1516                         schedule_delayed_work(&adapter->init_task, 10);
1517                         clear_bit(__I40EVF_IN_CRITICAL_TASK,
1518                                   &adapter->crit_section);
1519                         /* Don't reschedule the watchdog, since we've restarted
1520                          * the init task. When init_task contacts the PF and
1521                          * gets everything set up again, it'll restart the
1522                          * watchdog for us. Down, boy. Sit. Stay. Woof.
1523                          */
1524                         return;
1525                 }
1526                 adapter->aq_required = 0;
1527                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1528                 goto watchdog_done;
1529         }
1530
1531         if ((adapter->state < __I40EVF_DOWN) ||
1532             (adapter->flags & I40EVF_FLAG_RESET_PENDING))
1533                 goto watchdog_done;
1534
1535         /* check for reset */
1536         reg_val = rd32(hw, I40E_VF_ARQLEN1) & I40E_VF_ARQLEN1_ARQENABLE_MASK;
1537         if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) && !reg_val) {
1538                 adapter->state = __I40EVF_RESETTING;
1539                 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1540                 dev_err(&adapter->pdev->dev, "Hardware reset detected\n");
1541                 schedule_work(&adapter->reset_task);
1542                 adapter->aq_required = 0;
1543                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1544                 goto watchdog_done;
1545         }
1546
1547         /* Process admin queue tasks. After init, everything gets done
1548          * here so we don't race on the admin queue.
1549          */
1550         if (adapter->current_op) {
1551                 if (!i40evf_asq_done(hw)) {
1552                         dev_dbg(&adapter->pdev->dev, "Admin queue timeout\n");
1553                         i40evf_send_api_ver(adapter);
1554                 }
1555                 goto watchdog_done;
1556         }
1557         if (adapter->aq_required & I40EVF_FLAG_AQ_GET_CONFIG) {
1558                 i40evf_send_vf_config_msg(adapter);
1559                 goto watchdog_done;
1560         }
1561
1562         if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
1563                 i40evf_disable_queues(adapter);
1564                 goto watchdog_done;
1565         }
1566
1567         if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
1568                 i40evf_map_queues(adapter);
1569                 goto watchdog_done;
1570         }
1571
1572         if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
1573                 i40evf_add_ether_addrs(adapter);
1574                 goto watchdog_done;
1575         }
1576
1577         if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
1578                 i40evf_add_vlans(adapter);
1579                 goto watchdog_done;
1580         }
1581
1582         if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
1583                 i40evf_del_ether_addrs(adapter);
1584                 goto watchdog_done;
1585         }
1586
1587         if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
1588                 i40evf_del_vlans(adapter);
1589                 goto watchdog_done;
1590         }
1591
1592         if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
1593                 i40evf_configure_queues(adapter);
1594                 goto watchdog_done;
1595         }
1596
1597         if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
1598                 i40evf_enable_queues(adapter);
1599                 goto watchdog_done;
1600         }
1601
1602         if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_RSS) {
1603                 /* This message goes straight to the firmware, not the
1604                  * PF, so we don't have to set current_op as we will
1605                  * not get a response through the ARQ.
1606                  */
1607                 i40evf_init_rss(adapter);
1608                 adapter->aq_required &= ~I40EVF_FLAG_AQ_CONFIGURE_RSS;
1609                 goto watchdog_done;
1610         }
1611         if (adapter->aq_required & I40EVF_FLAG_AQ_GET_HENA) {
1612                 i40evf_get_hena(adapter);
1613                 goto watchdog_done;
1614         }
1615         if (adapter->aq_required & I40EVF_FLAG_AQ_SET_HENA) {
1616                 i40evf_set_hena(adapter);
1617                 goto watchdog_done;
1618         }
1619         if (adapter->aq_required & I40EVF_FLAG_AQ_SET_RSS_KEY) {
1620                 i40evf_set_rss_key(adapter);
1621                 goto watchdog_done;
1622         }
1623         if (adapter->aq_required & I40EVF_FLAG_AQ_SET_RSS_LUT) {
1624                 i40evf_set_rss_lut(adapter);
1625                 goto watchdog_done;
1626         }
1627
1628         if (adapter->aq_required & I40EVF_FLAG_AQ_REQUEST_PROMISC) {
1629                 i40evf_set_promiscuous(adapter, I40E_FLAG_VF_UNICAST_PROMISC |
1630                                        I40E_FLAG_VF_MULTICAST_PROMISC);
1631                 goto watchdog_done;
1632         }
1633
1634         if (adapter->aq_required & I40EVF_FLAG_AQ_REQUEST_ALLMULTI) {
1635                 i40evf_set_promiscuous(adapter, I40E_FLAG_VF_MULTICAST_PROMISC);
1636                 goto watchdog_done;
1637         }
1638
1639         if ((adapter->aq_required & I40EVF_FLAG_AQ_RELEASE_PROMISC) &&
1640             (adapter->aq_required & I40EVF_FLAG_AQ_RELEASE_ALLMULTI)) {
1641                 i40evf_set_promiscuous(adapter, 0);
1642                 goto watchdog_done;
1643         }
1644
1645         if (adapter->state == __I40EVF_RUNNING)
1646                 i40evf_request_stats(adapter);
1647 watchdog_done:
1648         if (adapter->state == __I40EVF_RUNNING) {
1649                 i40evf_irq_enable_queues(adapter, ~0);
1650                 i40evf_fire_sw_int(adapter, 0xFF);
1651         } else {
1652                 i40evf_fire_sw_int(adapter, 0x1);
1653         }
1654
1655         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1656 restart_watchdog:
1657         if (adapter->state == __I40EVF_REMOVE)
1658                 return;
1659         if (adapter->aq_required)
1660                 mod_timer(&adapter->watchdog_timer,
1661                           jiffies + msecs_to_jiffies(20));
1662         else
1663                 mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
1664         schedule_work(&adapter->adminq_task);
1665 }
1666
1667 #define I40EVF_RESET_WAIT_MS 10
1668 #define I40EVF_RESET_WAIT_COUNT 500
1669 /**
1670  * i40evf_reset_task - Call-back task to handle hardware reset
1671  * @work: pointer to work_struct
1672  *
1673  * During reset we need to shut down and reinitialize the admin queue
1674  * before we can use it to communicate with the PF again. We also clear
1675  * and reinit the rings because that context is lost as well.
1676  **/
1677 static void i40evf_reset_task(struct work_struct *work)
1678 {
1679         struct i40evf_adapter *adapter = container_of(work,
1680                                                       struct i40evf_adapter,
1681                                                       reset_task);
1682         struct net_device *netdev = adapter->netdev;
1683         struct i40e_hw *hw = &adapter->hw;
1684         struct i40evf_vlan_filter *vlf;
1685         struct i40evf_mac_filter *f;
1686         u32 reg_val;
1687         int i = 0, err;
1688
1689         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1690                                 &adapter->crit_section))
1691                 usleep_range(500, 1000);
1692
1693         i40evf_misc_irq_disable(adapter);
1694         if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) {
1695                 adapter->flags &= ~I40EVF_FLAG_RESET_NEEDED;
1696                 /* Restart the AQ here. If we have been reset but didn't
1697                  * detect it, or if the PF had to reinit, our AQ will be hosed.
1698                  */
1699                 i40evf_shutdown_adminq(hw);
1700                 i40evf_init_adminq(hw);
1701                 i40evf_request_reset(adapter);
1702         }
1703         adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1704
1705         /* poll until we see the reset actually happen */
1706         for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1707                 reg_val = rd32(hw, I40E_VF_ARQLEN1) &
1708                           I40E_VF_ARQLEN1_ARQENABLE_MASK;
1709                 if (!reg_val)
1710                         break;
1711                 usleep_range(5000, 10000);
1712         }
1713         if (i == I40EVF_RESET_WAIT_COUNT) {
1714                 dev_info(&adapter->pdev->dev, "Never saw reset\n");
1715                 goto continue_reset; /* act like the reset happened */
1716         }
1717
1718         /* wait until the reset is complete and the PF is responding to us */
1719         for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1720                 reg_val = rd32(hw, I40E_VFGEN_RSTAT) &
1721                           I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1722                 if (reg_val == I40E_VFR_VFACTIVE)
1723                         break;
1724                 msleep(I40EVF_RESET_WAIT_MS);
1725         }
1726         pci_set_master(adapter->pdev);
1727         /* extra wait to make sure minimum wait is met */
1728         msleep(I40EVF_RESET_WAIT_MS);
1729         if (i == I40EVF_RESET_WAIT_COUNT) {
1730                 struct i40evf_mac_filter *ftmp;
1731                 struct i40evf_vlan_filter *fv, *fvtmp;
1732
1733                 /* reset never finished */
1734                 dev_err(&adapter->pdev->dev, "Reset never finished (%x)\n",
1735                         reg_val);
1736                 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
1737
1738                 if (netif_running(adapter->netdev)) {
1739                         set_bit(__I40E_DOWN, &adapter->vsi.state);
1740                         netif_carrier_off(netdev);
1741                         netif_tx_disable(netdev);
1742                         adapter->link_up = false;
1743                         i40evf_napi_disable_all(adapter);
1744                         i40evf_irq_disable(adapter);
1745                         i40evf_free_traffic_irqs(adapter);
1746                         i40evf_free_all_tx_resources(adapter);
1747                         i40evf_free_all_rx_resources(adapter);
1748                 }
1749
1750                 /* Delete all of the filters, both MAC and VLAN. */
1751                 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list,
1752                                          list) {
1753                         list_del(&f->list);
1754                         kfree(f);
1755                 }
1756
1757                 list_for_each_entry_safe(fv, fvtmp, &adapter->vlan_filter_list,
1758                                          list) {
1759                         list_del(&fv->list);
1760                         kfree(fv);
1761                 }
1762
1763                 i40evf_free_misc_irq(adapter);
1764                 i40evf_reset_interrupt_capability(adapter);
1765                 i40evf_free_queues(adapter);
1766                 i40evf_free_q_vectors(adapter);
1767                 kfree(adapter->vf_res);
1768                 i40evf_shutdown_adminq(hw);
1769                 adapter->netdev->flags &= ~IFF_UP;
1770                 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1771                 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1772                 adapter->state = __I40EVF_DOWN;
1773                 dev_info(&adapter->pdev->dev, "Reset task did not complete, VF disabled\n");
1774                 return; /* Do not attempt to reinit. It's dead, Jim. */
1775         }
1776
1777 continue_reset:
1778         if (netif_running(adapter->netdev)) {
1779                 netif_carrier_off(netdev);
1780                 netif_tx_stop_all_queues(netdev);
1781                 adapter->link_up = false;
1782                 i40evf_napi_disable_all(adapter);
1783         }
1784         i40evf_irq_disable(adapter);
1785
1786         adapter->state = __I40EVF_RESETTING;
1787         adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1788
1789         /* free the Tx/Rx rings and descriptors, might be better to just
1790          * re-use them sometime in the future
1791          */
1792         i40evf_free_all_rx_resources(adapter);
1793         i40evf_free_all_tx_resources(adapter);
1794
1795         /* kill and reinit the admin queue */
1796         i40evf_shutdown_adminq(hw);
1797         adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1798         err = i40evf_init_adminq(hw);
1799         if (err)
1800                 dev_info(&adapter->pdev->dev, "Failed to init adminq: %d\n",
1801                          err);
1802
1803         adapter->aq_required = I40EVF_FLAG_AQ_GET_CONFIG;
1804         adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
1805
1806         /* re-add all MAC filters */
1807         list_for_each_entry(f, &adapter->mac_filter_list, list) {
1808                 f->add = true;
1809         }
1810         /* re-add all VLAN filters */
1811         list_for_each_entry(vlf, &adapter->vlan_filter_list, list) {
1812                 vlf->add = true;
1813         }
1814         adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
1815         adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
1816         /* Open RDMA Client again */
1817         adapter->aq_required |= I40EVF_FLAG_SERVICE_CLIENT_REQUESTED;
1818         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1819         i40evf_misc_irq_enable(adapter);
1820
1821         mod_timer(&adapter->watchdog_timer, jiffies + 2);
1822
1823         if (netif_running(adapter->netdev)) {
1824                 /* allocate transmit descriptors */
1825                 err = i40evf_setup_all_tx_resources(adapter);
1826                 if (err)
1827                         goto reset_err;
1828
1829                 /* allocate receive descriptors */
1830                 err = i40evf_setup_all_rx_resources(adapter);
1831                 if (err)
1832                         goto reset_err;
1833
1834                 i40evf_configure(adapter);
1835
1836                 i40evf_up_complete(adapter);
1837
1838                 i40evf_irq_enable(adapter, true);
1839         } else {
1840                 adapter->state = __I40EVF_DOWN;
1841         }
1842
1843         return;
1844 reset_err:
1845         dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
1846         i40evf_close(adapter->netdev);
1847 }
1848
1849 /**
1850  * i40evf_adminq_task - worker thread to clean the admin queue
1851  * @work: pointer to work_struct containing our data
1852  **/
1853 static void i40evf_adminq_task(struct work_struct *work)
1854 {
1855         struct i40evf_adapter *adapter =
1856                 container_of(work, struct i40evf_adapter, adminq_task);
1857         struct i40e_hw *hw = &adapter->hw;
1858         struct i40e_arq_event_info event;
1859         struct i40e_virtchnl_msg *v_msg;
1860         i40e_status ret;
1861         u32 val, oldval;
1862         u16 pending;
1863
1864         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
1865                 goto out;
1866
1867         event.buf_len = I40EVF_MAX_AQ_BUF_SIZE;
1868         event.msg_buf = kzalloc(event.buf_len, GFP_KERNEL);
1869         if (!event.msg_buf)
1870                 goto out;
1871
1872         v_msg = (struct i40e_virtchnl_msg *)&event.desc;
1873         do {
1874                 ret = i40evf_clean_arq_element(hw, &event, &pending);
1875                 if (ret || !v_msg->v_opcode)
1876                         break; /* No event to process or error cleaning ARQ */
1877
1878                 i40evf_virtchnl_completion(adapter, v_msg->v_opcode,
1879                                            v_msg->v_retval, event.msg_buf,
1880                                            event.msg_len);
1881                 if (pending != 0)
1882                         memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
1883         } while (pending);
1884
1885         if ((adapter->flags &
1886              (I40EVF_FLAG_RESET_PENDING | I40EVF_FLAG_RESET_NEEDED)) ||
1887             adapter->state == __I40EVF_RESETTING)
1888                 goto freedom;
1889
1890         /* check for error indications */
1891         val = rd32(hw, hw->aq.arq.len);
1892         if (val == 0xdeadbeef) /* indicates device in reset */
1893                 goto freedom;
1894         oldval = val;
1895         if (val & I40E_VF_ARQLEN1_ARQVFE_MASK) {
1896                 dev_info(&adapter->pdev->dev, "ARQ VF Error detected\n");
1897                 val &= ~I40E_VF_ARQLEN1_ARQVFE_MASK;
1898         }
1899         if (val & I40E_VF_ARQLEN1_ARQOVFL_MASK) {
1900                 dev_info(&adapter->pdev->dev, "ARQ Overflow Error detected\n");
1901                 val &= ~I40E_VF_ARQLEN1_ARQOVFL_MASK;
1902         }
1903         if (val & I40E_VF_ARQLEN1_ARQCRIT_MASK) {
1904                 dev_info(&adapter->pdev->dev, "ARQ Critical Error detected\n");
1905                 val &= ~I40E_VF_ARQLEN1_ARQCRIT_MASK;
1906         }
1907         if (oldval != val)
1908                 wr32(hw, hw->aq.arq.len, val);
1909
1910         val = rd32(hw, hw->aq.asq.len);
1911         oldval = val;
1912         if (val & I40E_VF_ATQLEN1_ATQVFE_MASK) {
1913                 dev_info(&adapter->pdev->dev, "ASQ VF Error detected\n");
1914                 val &= ~I40E_VF_ATQLEN1_ATQVFE_MASK;
1915         }
1916         if (val & I40E_VF_ATQLEN1_ATQOVFL_MASK) {
1917                 dev_info(&adapter->pdev->dev, "ASQ Overflow Error detected\n");
1918                 val &= ~I40E_VF_ATQLEN1_ATQOVFL_MASK;
1919         }
1920         if (val & I40E_VF_ATQLEN1_ATQCRIT_MASK) {
1921                 dev_info(&adapter->pdev->dev, "ASQ Critical Error detected\n");
1922                 val &= ~I40E_VF_ATQLEN1_ATQCRIT_MASK;
1923         }
1924         if (oldval != val)
1925                 wr32(hw, hw->aq.asq.len, val);
1926
1927 freedom:
1928         kfree(event.msg_buf);
1929 out:
1930         /* re-enable Admin queue interrupt cause */
1931         i40evf_misc_irq_enable(adapter);
1932 }
1933
1934 /**
1935  * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
1936  * @adapter: board private structure
1937  *
1938  * Free all transmit software resources
1939  **/
1940 void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
1941 {
1942         int i;
1943
1944         if (!adapter->tx_rings)
1945                 return;
1946
1947         for (i = 0; i < adapter->num_active_queues; i++)
1948                 if (adapter->tx_rings[i].desc)
1949                         i40evf_free_tx_resources(&adapter->tx_rings[i]);
1950 }
1951
1952 /**
1953  * i40evf_setup_all_tx_resources - allocate all queues Tx resources
1954  * @adapter: board private structure
1955  *
1956  * If this function returns with an error, then it's possible one or
1957  * more of the rings is populated (while the rest are not).  It is the
1958  * callers duty to clean those orphaned rings.
1959  *
1960  * Return 0 on success, negative on failure
1961  **/
1962 static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter)
1963 {
1964         int i, err = 0;
1965
1966         for (i = 0; i < adapter->num_active_queues; i++) {
1967                 adapter->tx_rings[i].count = adapter->tx_desc_count;
1968                 err = i40evf_setup_tx_descriptors(&adapter->tx_rings[i]);
1969                 if (!err)
1970                         continue;
1971                 dev_err(&adapter->pdev->dev,
1972                         "Allocation for Tx Queue %u failed\n", i);
1973                 break;
1974         }
1975
1976         return err;
1977 }
1978
1979 /**
1980  * i40evf_setup_all_rx_resources - allocate all queues Rx resources
1981  * @adapter: board private structure
1982  *
1983  * If this function returns with an error, then it's possible one or
1984  * more of the rings is populated (while the rest are not).  It is the
1985  * callers duty to clean those orphaned rings.
1986  *
1987  * Return 0 on success, negative on failure
1988  **/
1989 static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter)
1990 {
1991         int i, err = 0;
1992
1993         for (i = 0; i < adapter->num_active_queues; i++) {
1994                 adapter->rx_rings[i].count = adapter->rx_desc_count;
1995                 err = i40evf_setup_rx_descriptors(&adapter->rx_rings[i]);
1996                 if (!err)
1997                         continue;
1998                 dev_err(&adapter->pdev->dev,
1999                         "Allocation for Rx Queue %u failed\n", i);
2000                 break;
2001         }
2002         return err;
2003 }
2004
2005 /**
2006  * i40evf_free_all_rx_resources - Free Rx Resources for All Queues
2007  * @adapter: board private structure
2008  *
2009  * Free all receive software resources
2010  **/
2011 void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
2012 {
2013         int i;
2014
2015         if (!adapter->rx_rings)
2016                 return;
2017
2018         for (i = 0; i < adapter->num_active_queues; i++)
2019                 if (adapter->rx_rings[i].desc)
2020                         i40evf_free_rx_resources(&adapter->rx_rings[i]);
2021 }
2022
2023 /**
2024  * i40evf_open - Called when a network interface is made active
2025  * @netdev: network interface device structure
2026  *
2027  * Returns 0 on success, negative value on failure
2028  *
2029  * The open entry point is called when a network interface is made
2030  * active by the system (IFF_UP).  At this point all resources needed
2031  * for transmit and receive operations are allocated, the interrupt
2032  * handler is registered with the OS, the watchdog timer is started,
2033  * and the stack is notified that the interface is ready.
2034  **/
2035 static int i40evf_open(struct net_device *netdev)
2036 {
2037         struct i40evf_adapter *adapter = netdev_priv(netdev);
2038         int err;
2039
2040         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
2041                 dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
2042                 return -EIO;
2043         }
2044
2045         if (adapter->state != __I40EVF_DOWN)
2046                 return -EBUSY;
2047
2048         /* allocate transmit descriptors */
2049         err = i40evf_setup_all_tx_resources(adapter);
2050         if (err)
2051                 goto err_setup_tx;
2052
2053         /* allocate receive descriptors */
2054         err = i40evf_setup_all_rx_resources(adapter);
2055         if (err)
2056                 goto err_setup_rx;
2057
2058         /* clear any pending interrupts, may auto mask */
2059         err = i40evf_request_traffic_irqs(adapter, netdev->name);
2060         if (err)
2061                 goto err_req_irq;
2062
2063         i40evf_add_filter(adapter, adapter->hw.mac.addr);
2064         i40evf_configure(adapter);
2065
2066         i40evf_up_complete(adapter);
2067
2068         i40evf_irq_enable(adapter, true);
2069
2070         return 0;
2071
2072 err_req_irq:
2073         i40evf_down(adapter);
2074         i40evf_free_traffic_irqs(adapter);
2075 err_setup_rx:
2076         i40evf_free_all_rx_resources(adapter);
2077 err_setup_tx:
2078         i40evf_free_all_tx_resources(adapter);
2079
2080         return err;
2081 }
2082
2083 /**
2084  * i40evf_close - Disables a network interface
2085  * @netdev: network interface device structure
2086  *
2087  * Returns 0, this is not allowed to fail
2088  *
2089  * The close entry point is called when an interface is de-activated
2090  * by the OS.  The hardware is still under the drivers control, but
2091  * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
2092  * are freed, along with all transmit and receive resources.
2093  **/
2094 static int i40evf_close(struct net_device *netdev)
2095 {
2096         struct i40evf_adapter *adapter = netdev_priv(netdev);
2097
2098         if (adapter->state <= __I40EVF_DOWN_PENDING)
2099                 return 0;
2100
2101
2102         set_bit(__I40E_DOWN, &adapter->vsi.state);
2103
2104         i40evf_down(adapter);
2105         adapter->state = __I40EVF_DOWN_PENDING;
2106         i40evf_free_traffic_irqs(adapter);
2107
2108         return 0;
2109 }
2110
2111 /**
2112  * i40evf_get_stats - Get System Network Statistics
2113  * @netdev: network interface device structure
2114  *
2115  * Returns the address of the device statistics structure.
2116  * The statistics are actually updated from the timer callback.
2117  **/
2118 static struct net_device_stats *i40evf_get_stats(struct net_device *netdev)
2119 {
2120         struct i40evf_adapter *adapter = netdev_priv(netdev);
2121
2122         /* only return the current stats */
2123         return &adapter->net_stats;
2124 }
2125
2126 /**
2127  * i40evf_change_mtu - Change the Maximum Transfer Unit
2128  * @netdev: network interface device structure
2129  * @new_mtu: new value for maximum frame size
2130  *
2131  * Returns 0 on success, negative on failure
2132  **/
2133 static int i40evf_change_mtu(struct net_device *netdev, int new_mtu)
2134 {
2135         struct i40evf_adapter *adapter = netdev_priv(netdev);
2136         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
2137
2138         if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
2139                 return -EINVAL;
2140
2141         netdev->mtu = new_mtu;
2142         adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
2143         schedule_work(&adapter->reset_task);
2144
2145         return 0;
2146 }
2147
2148 #define I40EVF_VLAN_FEATURES (NETIF_F_HW_VLAN_CTAG_TX |\
2149                               NETIF_F_HW_VLAN_CTAG_RX |\
2150                               NETIF_F_HW_VLAN_CTAG_FILTER)
2151
2152 /**
2153  * i40evf_fix_features - fix up the netdev feature bits
2154  * @netdev: our net device
2155  * @features: desired feature bits
2156  *
2157  * Returns fixed-up features bits
2158  **/
2159 static netdev_features_t i40evf_fix_features(struct net_device *netdev,
2160                                              netdev_features_t features)
2161 {
2162         struct i40evf_adapter *adapter = netdev_priv(netdev);
2163
2164         features &= ~I40EVF_VLAN_FEATURES;
2165         if (adapter->vf_res->vf_offload_flags & I40E_VIRTCHNL_VF_OFFLOAD_VLAN)
2166                 features |= I40EVF_VLAN_FEATURES;
2167         return features;
2168 }
2169
2170 static const struct net_device_ops i40evf_netdev_ops = {
2171         .ndo_open               = i40evf_open,
2172         .ndo_stop               = i40evf_close,
2173         .ndo_start_xmit         = i40evf_xmit_frame,
2174         .ndo_get_stats          = i40evf_get_stats,
2175         .ndo_set_rx_mode        = i40evf_set_rx_mode,
2176         .ndo_validate_addr      = eth_validate_addr,
2177         .ndo_set_mac_address    = i40evf_set_mac,
2178         .ndo_change_mtu         = i40evf_change_mtu,
2179         .ndo_tx_timeout         = i40evf_tx_timeout,
2180         .ndo_vlan_rx_add_vid    = i40evf_vlan_rx_add_vid,
2181         .ndo_vlan_rx_kill_vid   = i40evf_vlan_rx_kill_vid,
2182         .ndo_fix_features       = i40evf_fix_features,
2183 #ifdef CONFIG_NET_POLL_CONTROLLER
2184         .ndo_poll_controller    = i40evf_netpoll,
2185 #endif
2186 };
2187
2188 /**
2189  * i40evf_check_reset_complete - check that VF reset is complete
2190  * @hw: pointer to hw struct
2191  *
2192  * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
2193  **/
2194 static int i40evf_check_reset_complete(struct i40e_hw *hw)
2195 {
2196         u32 rstat;
2197         int i;
2198
2199         for (i = 0; i < 100; i++) {
2200                 rstat = rd32(hw, I40E_VFGEN_RSTAT) &
2201                             I40E_VFGEN_RSTAT_VFR_STATE_MASK;
2202                 if ((rstat == I40E_VFR_VFACTIVE) ||
2203                     (rstat == I40E_VFR_COMPLETED))
2204                         return 0;
2205                 usleep_range(10, 20);
2206         }
2207         return -EBUSY;
2208 }
2209
2210 /**
2211  * i40evf_process_config - Process the config information we got from the PF
2212  * @adapter: board private structure
2213  *
2214  * Verify that we have a valid config struct, and set up our netdev features
2215  * and our VSI struct.
2216  **/
2217 int i40evf_process_config(struct i40evf_adapter *adapter)
2218 {
2219         struct i40e_virtchnl_vf_resource *vfres = adapter->vf_res;
2220         struct net_device *netdev = adapter->netdev;
2221         struct i40e_vsi *vsi = &adapter->vsi;
2222         int i;
2223
2224         /* got VF config message back from PF, now we can parse it */
2225         for (i = 0; i < vfres->num_vsis; i++) {
2226                 if (vfres->vsi_res[i].vsi_type == I40E_VSI_SRIOV)
2227                         adapter->vsi_res = &vfres->vsi_res[i];
2228         }
2229         if (!adapter->vsi_res) {
2230                 dev_err(&adapter->pdev->dev, "No LAN VSI found\n");
2231                 return -ENODEV;
2232         }
2233
2234         netdev->hw_enc_features |= NETIF_F_SG                   |
2235                                    NETIF_F_IP_CSUM              |
2236                                    NETIF_F_IPV6_CSUM            |
2237                                    NETIF_F_HIGHDMA              |
2238                                    NETIF_F_SOFT_FEATURES        |
2239                                    NETIF_F_TSO                  |
2240                                    NETIF_F_TSO_ECN              |
2241                                    NETIF_F_TSO6                 |
2242                                    NETIF_F_GSO_GRE              |
2243                                    NETIF_F_GSO_GRE_CSUM         |
2244                                    NETIF_F_GSO_IPXIP4           |
2245                                    NETIF_F_GSO_IPXIP6           |
2246                                    NETIF_F_GSO_UDP_TUNNEL       |
2247                                    NETIF_F_GSO_UDP_TUNNEL_CSUM  |
2248                                    NETIF_F_GSO_PARTIAL          |
2249                                    NETIF_F_SCTP_CRC             |
2250                                    NETIF_F_RXHASH               |
2251                                    NETIF_F_RXCSUM               |
2252                                    0;
2253
2254         if (!(adapter->flags & I40EVF_FLAG_OUTER_UDP_CSUM_CAPABLE))
2255                 netdev->gso_partial_features |= NETIF_F_GSO_UDP_TUNNEL_CSUM;
2256
2257         netdev->gso_partial_features |= NETIF_F_GSO_GRE_CSUM;
2258
2259         /* record features VLANs can make use of */
2260         netdev->vlan_features |= netdev->hw_enc_features |
2261                                  NETIF_F_TSO_MANGLEID;
2262
2263         /* Write features and hw_features separately to avoid polluting
2264          * with, or dropping, features that are set when we registgered.
2265          */
2266         netdev->hw_features |= netdev->hw_enc_features;
2267
2268         netdev->features |= netdev->hw_enc_features | I40EVF_VLAN_FEATURES;
2269         netdev->hw_enc_features |= NETIF_F_TSO_MANGLEID;
2270
2271         /* disable VLAN features if not supported */
2272         if (!(vfres->vf_offload_flags & I40E_VIRTCHNL_VF_OFFLOAD_VLAN))
2273                 netdev->features ^= I40EVF_VLAN_FEATURES;
2274
2275         adapter->vsi.id = adapter->vsi_res->vsi_id;
2276
2277         adapter->vsi.back = adapter;
2278         adapter->vsi.base_vector = 1;
2279         adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
2280         vsi->netdev = adapter->netdev;
2281         vsi->qs_handle = adapter->vsi_res->qset_handle;
2282         if (vfres->vf_offload_flags & I40E_VIRTCHNL_VF_OFFLOAD_RSS_PF) {
2283                 adapter->rss_key_size = vfres->rss_key_size;
2284                 adapter->rss_lut_size = vfres->rss_lut_size;
2285         } else {
2286                 adapter->rss_key_size = I40EVF_HKEY_ARRAY_SIZE;
2287                 adapter->rss_lut_size = I40EVF_HLUT_ARRAY_SIZE;
2288         }
2289
2290         return 0;
2291 }
2292
2293 /**
2294  * i40evf_init_task - worker thread to perform delayed initialization
2295  * @work: pointer to work_struct containing our data
2296  *
2297  * This task completes the work that was begun in probe. Due to the nature
2298  * of VF-PF communications, we may need to wait tens of milliseconds to get
2299  * responses back from the PF. Rather than busy-wait in probe and bog down the
2300  * whole system, we'll do it in a task so we can sleep.
2301  * This task only runs during driver init. Once we've established
2302  * communications with the PF driver and set up our netdev, the watchdog
2303  * takes over.
2304  **/
2305 static void i40evf_init_task(struct work_struct *work)
2306 {
2307         struct i40evf_adapter *adapter = container_of(work,
2308                                                       struct i40evf_adapter,
2309                                                       init_task.work);
2310         struct net_device *netdev = adapter->netdev;
2311         struct i40e_hw *hw = &adapter->hw;
2312         struct pci_dev *pdev = adapter->pdev;
2313         int err, bufsz;
2314
2315         switch (adapter->state) {
2316         case __I40EVF_STARTUP:
2317                 /* driver loaded, probe complete */
2318                 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
2319                 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
2320                 err = i40e_set_mac_type(hw);
2321                 if (err) {
2322                         dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
2323                                 err);
2324                         goto err;
2325                 }
2326                 err = i40evf_check_reset_complete(hw);
2327                 if (err) {
2328                         dev_info(&pdev->dev, "Device is still in reset (%d), retrying\n",
2329                                  err);
2330                         goto err;
2331                 }
2332                 hw->aq.num_arq_entries = I40EVF_AQ_LEN;
2333                 hw->aq.num_asq_entries = I40EVF_AQ_LEN;
2334                 hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2335                 hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2336
2337                 err = i40evf_init_adminq(hw);
2338                 if (err) {
2339                         dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
2340                                 err);
2341                         goto err;
2342                 }
2343                 err = i40evf_send_api_ver(adapter);
2344                 if (err) {
2345                         dev_err(&pdev->dev, "Unable to send to PF (%d)\n", err);
2346                         i40evf_shutdown_adminq(hw);
2347                         goto err;
2348                 }
2349                 adapter->state = __I40EVF_INIT_VERSION_CHECK;
2350                 goto restart;
2351         case __I40EVF_INIT_VERSION_CHECK:
2352                 if (!i40evf_asq_done(hw)) {
2353                         dev_err(&pdev->dev, "Admin queue command never completed\n");
2354                         i40evf_shutdown_adminq(hw);
2355                         adapter->state = __I40EVF_STARTUP;
2356                         goto err;
2357                 }
2358
2359                 /* aq msg sent, awaiting reply */
2360                 err = i40evf_verify_api_ver(adapter);
2361                 if (err) {
2362                         if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
2363                                 err = i40evf_send_api_ver(adapter);
2364                         else
2365                                 dev_err(&pdev->dev, "Unsupported PF API version %d.%d, expected %d.%d\n",
2366                                         adapter->pf_version.major,
2367                                         adapter->pf_version.minor,
2368                                         I40E_VIRTCHNL_VERSION_MAJOR,
2369                                         I40E_VIRTCHNL_VERSION_MINOR);
2370                         goto err;
2371                 }
2372                 err = i40evf_send_vf_config_msg(adapter);
2373                 if (err) {
2374                         dev_err(&pdev->dev, "Unable to send config request (%d)\n",
2375                                 err);
2376                         goto err;
2377                 }
2378                 adapter->state = __I40EVF_INIT_GET_RESOURCES;
2379                 goto restart;
2380         case __I40EVF_INIT_GET_RESOURCES:
2381                 /* aq msg sent, awaiting reply */
2382                 if (!adapter->vf_res) {
2383                         bufsz = sizeof(struct i40e_virtchnl_vf_resource) +
2384                                 (I40E_MAX_VF_VSI *
2385                                  sizeof(struct i40e_virtchnl_vsi_resource));
2386                         adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
2387                         if (!adapter->vf_res)
2388                                 goto err;
2389                 }
2390                 err = i40evf_get_vf_config(adapter);
2391                 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK) {
2392                         err = i40evf_send_vf_config_msg(adapter);
2393                         goto err;
2394                 } else if (err == I40E_ERR_PARAM) {
2395                         /* We only get ERR_PARAM if the device is in a very bad
2396                          * state or if we've been disabled for previous bad
2397                          * behavior. Either way, we're done now.
2398                          */
2399                         i40evf_shutdown_adminq(hw);
2400                         dev_err(&pdev->dev, "Unable to get VF config due to PF error condition, not retrying\n");
2401                         return;
2402                 }
2403                 if (err) {
2404                         dev_err(&pdev->dev, "Unable to get VF config (%d)\n",
2405                                 err);
2406                         goto err_alloc;
2407                 }
2408                 adapter->state = __I40EVF_INIT_SW;
2409                 break;
2410         default:
2411                 goto err_alloc;
2412         }
2413
2414         if (hw->mac.type == I40E_MAC_X722_VF)
2415                 adapter->flags |= I40EVF_FLAG_OUTER_UDP_CSUM_CAPABLE;
2416
2417         if (i40evf_process_config(adapter))
2418                 goto err_alloc;
2419         adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
2420
2421         adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
2422
2423         netdev->netdev_ops = &i40evf_netdev_ops;
2424         i40evf_set_ethtool_ops(netdev);
2425         netdev->watchdog_timeo = 5 * HZ;
2426
2427         if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
2428                 dev_info(&pdev->dev, "Invalid MAC address %pM, using random\n",
2429                          adapter->hw.mac.addr);
2430                 eth_hw_addr_random(netdev);
2431                 ether_addr_copy(adapter->hw.mac.addr, netdev->dev_addr);
2432         } else {
2433                 adapter->flags |= I40EVF_FLAG_ADDR_SET_BY_PF;
2434                 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
2435                 ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
2436         }
2437
2438         init_timer(&adapter->watchdog_timer);
2439         adapter->watchdog_timer.function = &i40evf_watchdog_timer;
2440         adapter->watchdog_timer.data = (unsigned long)adapter;
2441         mod_timer(&adapter->watchdog_timer, jiffies + 1);
2442
2443         adapter->num_active_queues = min_t(int,
2444                                            adapter->vsi_res->num_queue_pairs,
2445                                            (int)(num_online_cpus()));
2446         adapter->tx_desc_count = I40EVF_DEFAULT_TXD;
2447         adapter->rx_desc_count = I40EVF_DEFAULT_RXD;
2448         err = i40evf_init_interrupt_scheme(adapter);
2449         if (err)
2450                 goto err_sw_init;
2451         i40evf_map_rings_to_vectors(adapter);
2452         if (adapter->vf_res->vf_offload_flags &
2453             I40E_VIRTCHNL_VF_OFFLOAD_WB_ON_ITR)
2454                 adapter->flags |= I40EVF_FLAG_WB_ON_ITR_CAPABLE;
2455
2456         err = i40evf_request_misc_irq(adapter);
2457         if (err)
2458                 goto err_sw_init;
2459
2460         netif_carrier_off(netdev);
2461         adapter->link_up = false;
2462
2463         if (!adapter->netdev_registered) {
2464                 err = register_netdev(netdev);
2465                 if (err)
2466                         goto err_register;
2467         }
2468
2469         adapter->netdev_registered = true;
2470
2471         netif_tx_stop_all_queues(netdev);
2472
2473         dev_info(&pdev->dev, "MAC address: %pM\n", adapter->hw.mac.addr);
2474         if (netdev->features & NETIF_F_GRO)
2475                 dev_info(&pdev->dev, "GRO is enabled\n");
2476
2477         adapter->state = __I40EVF_DOWN;
2478         set_bit(__I40E_DOWN, &adapter->vsi.state);
2479         i40evf_misc_irq_enable(adapter);
2480
2481         adapter->rss_key = kzalloc(adapter->rss_key_size, GFP_KERNEL);
2482         adapter->rss_lut = kzalloc(adapter->rss_lut_size, GFP_KERNEL);
2483         if (!adapter->rss_key || !adapter->rss_lut)
2484                 goto err_mem;
2485
2486         if (RSS_AQ(adapter)) {
2487                 adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_RSS;
2488                 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
2489         } else {
2490                 i40evf_init_rss(adapter);
2491         }
2492         return;
2493 restart:
2494         schedule_delayed_work(&adapter->init_task, msecs_to_jiffies(30));
2495         return;
2496 err_mem:
2497         i40evf_free_rss(adapter);
2498 err_register:
2499         i40evf_free_misc_irq(adapter);
2500 err_sw_init:
2501         i40evf_reset_interrupt_capability(adapter);
2502 err_alloc:
2503         kfree(adapter->vf_res);
2504         adapter->vf_res = NULL;
2505 err:
2506         /* Things went into the weeds, so try again later */
2507         if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
2508                 dev_err(&pdev->dev, "Failed to communicate with PF; waiting before retry\n");
2509                 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
2510                 i40evf_shutdown_adminq(hw);
2511                 adapter->state = __I40EVF_STARTUP;
2512                 schedule_delayed_work(&adapter->init_task, HZ * 5);
2513                 return;
2514         }
2515         schedule_delayed_work(&adapter->init_task, HZ);
2516 }
2517
2518 /**
2519  * i40evf_shutdown - Shutdown the device in preparation for a reboot
2520  * @pdev: pci device structure
2521  **/
2522 static void i40evf_shutdown(struct pci_dev *pdev)
2523 {
2524         struct net_device *netdev = pci_get_drvdata(pdev);
2525         struct i40evf_adapter *adapter = netdev_priv(netdev);
2526
2527         netif_device_detach(netdev);
2528
2529         if (netif_running(netdev))
2530                 i40evf_close(netdev);
2531
2532         /* Prevent the watchdog from running. */
2533         adapter->state = __I40EVF_REMOVE;
2534         adapter->aq_required = 0;
2535
2536 #ifdef CONFIG_PM
2537         pci_save_state(pdev);
2538
2539 #endif
2540         pci_disable_device(pdev);
2541 }
2542
2543 /**
2544  * i40evf_probe - Device Initialization Routine
2545  * @pdev: PCI device information struct
2546  * @ent: entry in i40evf_pci_tbl
2547  *
2548  * Returns 0 on success, negative on failure
2549  *
2550  * i40evf_probe initializes an adapter identified by a pci_dev structure.
2551  * The OS initialization, configuring of the adapter private structure,
2552  * and a hardware reset occur.
2553  **/
2554 static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2555 {
2556         struct net_device *netdev;
2557         struct i40evf_adapter *adapter = NULL;
2558         struct i40e_hw *hw = NULL;
2559         int err;
2560
2561         err = pci_enable_device(pdev);
2562         if (err)
2563                 return err;
2564
2565         err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
2566         if (err) {
2567                 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2568                 if (err) {
2569                         dev_err(&pdev->dev,
2570                                 "DMA configuration failed: 0x%x\n", err);
2571                         goto err_dma;
2572                 }
2573         }
2574
2575         err = pci_request_regions(pdev, i40evf_driver_name);
2576         if (err) {
2577                 dev_err(&pdev->dev,
2578                         "pci_request_regions failed 0x%x\n", err);
2579                 goto err_pci_reg;
2580         }
2581
2582         pci_enable_pcie_error_reporting(pdev);
2583
2584         pci_set_master(pdev);
2585
2586         netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter), MAX_QUEUES);
2587         if (!netdev) {
2588                 err = -ENOMEM;
2589                 goto err_alloc_etherdev;
2590         }
2591
2592         SET_NETDEV_DEV(netdev, &pdev->dev);
2593
2594         pci_set_drvdata(pdev, netdev);
2595         adapter = netdev_priv(netdev);
2596
2597         adapter->netdev = netdev;
2598         adapter->pdev = pdev;
2599
2600         hw = &adapter->hw;
2601         hw->back = adapter;
2602
2603         adapter->msg_enable = BIT(DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
2604         adapter->state = __I40EVF_STARTUP;
2605
2606         /* Call save state here because it relies on the adapter struct. */
2607         pci_save_state(pdev);
2608
2609         hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
2610                               pci_resource_len(pdev, 0));
2611         if (!hw->hw_addr) {
2612                 err = -EIO;
2613                 goto err_ioremap;
2614         }
2615         hw->vendor_id = pdev->vendor;
2616         hw->device_id = pdev->device;
2617         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2618         hw->subsystem_vendor_id = pdev->subsystem_vendor;
2619         hw->subsystem_device_id = pdev->subsystem_device;
2620         hw->bus.device = PCI_SLOT(pdev->devfn);
2621         hw->bus.func = PCI_FUNC(pdev->devfn);
2622
2623         /* set up the locks for the AQ, do this only once in probe
2624          * and destroy them only once in remove
2625          */
2626         mutex_init(&hw->aq.asq_mutex);
2627         mutex_init(&hw->aq.arq_mutex);
2628
2629         INIT_LIST_HEAD(&adapter->mac_filter_list);
2630         INIT_LIST_HEAD(&adapter->vlan_filter_list);
2631
2632         INIT_WORK(&adapter->reset_task, i40evf_reset_task);
2633         INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
2634         INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
2635         INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
2636         schedule_delayed_work(&adapter->init_task,
2637                               msecs_to_jiffies(5 * (pdev->devfn & 0x07)));
2638
2639         return 0;
2640
2641 err_ioremap:
2642         free_netdev(netdev);
2643 err_alloc_etherdev:
2644         pci_release_regions(pdev);
2645 err_pci_reg:
2646 err_dma:
2647         pci_disable_device(pdev);
2648         return err;
2649 }
2650
2651 #ifdef CONFIG_PM
2652 /**
2653  * i40evf_suspend - Power management suspend routine
2654  * @pdev: PCI device information struct
2655  * @state: unused
2656  *
2657  * Called when the system (VM) is entering sleep/suspend.
2658  **/
2659 static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
2660 {
2661         struct net_device *netdev = pci_get_drvdata(pdev);
2662         struct i40evf_adapter *adapter = netdev_priv(netdev);
2663         int retval = 0;
2664
2665         netif_device_detach(netdev);
2666
2667         if (netif_running(netdev)) {
2668                 rtnl_lock();
2669                 i40evf_down(adapter);
2670                 rtnl_unlock();
2671         }
2672         i40evf_free_misc_irq(adapter);
2673         i40evf_reset_interrupt_capability(adapter);
2674
2675         retval = pci_save_state(pdev);
2676         if (retval)
2677                 return retval;
2678
2679         pci_disable_device(pdev);
2680
2681         return 0;
2682 }
2683
2684 /**
2685  * i40evf_resume - Power management resume routine
2686  * @pdev: PCI device information struct
2687  *
2688  * Called when the system (VM) is resumed from sleep/suspend.
2689  **/
2690 static int i40evf_resume(struct pci_dev *pdev)
2691 {
2692         struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
2693         struct net_device *netdev = adapter->netdev;
2694         u32 err;
2695
2696         pci_set_power_state(pdev, PCI_D0);
2697         pci_restore_state(pdev);
2698         /* pci_restore_state clears dev->state_saved so call
2699          * pci_save_state to restore it.
2700          */
2701         pci_save_state(pdev);
2702
2703         err = pci_enable_device_mem(pdev);
2704         if (err) {
2705                 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
2706                 return err;
2707         }
2708         pci_set_master(pdev);
2709
2710         rtnl_lock();
2711         err = i40evf_set_interrupt_capability(adapter);
2712         if (err) {
2713                 rtnl_unlock();
2714                 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
2715                 return err;
2716         }
2717         err = i40evf_request_misc_irq(adapter);
2718         rtnl_unlock();
2719         if (err) {
2720                 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
2721                 return err;
2722         }
2723
2724         schedule_work(&adapter->reset_task);
2725
2726         netif_device_attach(netdev);
2727
2728         return err;
2729 }
2730
2731 #endif /* CONFIG_PM */
2732 /**
2733  * i40evf_remove - Device Removal Routine
2734  * @pdev: PCI device information struct
2735  *
2736  * i40evf_remove is called by the PCI subsystem to alert the driver
2737  * that it should release a PCI device.  The could be caused by a
2738  * Hot-Plug event, or because the driver is going to be removed from
2739  * memory.
2740  **/
2741 static void i40evf_remove(struct pci_dev *pdev)
2742 {
2743         struct net_device *netdev = pci_get_drvdata(pdev);
2744         struct i40evf_adapter *adapter = netdev_priv(netdev);
2745         struct i40evf_mac_filter *f, *ftmp;
2746         struct i40e_hw *hw = &adapter->hw;
2747
2748         cancel_delayed_work_sync(&adapter->init_task);
2749         cancel_work_sync(&adapter->reset_task);
2750
2751         if (adapter->netdev_registered) {
2752                 unregister_netdev(netdev);
2753                 adapter->netdev_registered = false;
2754         }
2755
2756         /* Shut down all the garbage mashers on the detention level */
2757         adapter->state = __I40EVF_REMOVE;
2758         adapter->aq_required = 0;
2759         i40evf_request_reset(adapter);
2760         msleep(50);
2761         /* If the FW isn't responding, kick it once, but only once. */
2762         if (!i40evf_asq_done(hw)) {
2763                 i40evf_request_reset(adapter);
2764                 msleep(50);
2765         }
2766
2767         if (adapter->msix_entries) {
2768                 i40evf_misc_irq_disable(adapter);
2769                 i40evf_free_misc_irq(adapter);
2770                 i40evf_reset_interrupt_capability(adapter);
2771                 i40evf_free_q_vectors(adapter);
2772         }
2773
2774         if (adapter->watchdog_timer.function)
2775                 del_timer_sync(&adapter->watchdog_timer);
2776
2777         flush_scheduled_work();
2778
2779         i40evf_free_rss(adapter);
2780
2781         if (hw->aq.asq.count)
2782                 i40evf_shutdown_adminq(hw);
2783
2784         /* destroy the locks only once, here */
2785         mutex_destroy(&hw->aq.arq_mutex);
2786         mutex_destroy(&hw->aq.asq_mutex);
2787
2788         iounmap(hw->hw_addr);
2789         pci_release_regions(pdev);
2790         i40evf_free_all_tx_resources(adapter);
2791         i40evf_free_all_rx_resources(adapter);
2792         i40evf_free_queues(adapter);
2793         kfree(adapter->vf_res);
2794         /* If we got removed before an up/down sequence, we've got a filter
2795          * hanging out there that we need to get rid of.
2796          */
2797         list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
2798                 list_del(&f->list);
2799                 kfree(f);
2800         }
2801         list_for_each_entry_safe(f, ftmp, &adapter->vlan_filter_list, list) {
2802                 list_del(&f->list);
2803                 kfree(f);
2804         }
2805
2806         free_netdev(netdev);
2807
2808         pci_disable_pcie_error_reporting(pdev);
2809
2810         pci_disable_device(pdev);
2811 }
2812
2813 static struct pci_driver i40evf_driver = {
2814         .name     = i40evf_driver_name,
2815         .id_table = i40evf_pci_tbl,
2816         .probe    = i40evf_probe,
2817         .remove   = i40evf_remove,
2818 #ifdef CONFIG_PM
2819         .suspend  = i40evf_suspend,
2820         .resume   = i40evf_resume,
2821 #endif
2822         .shutdown = i40evf_shutdown,
2823 };
2824
2825 /**
2826  * i40e_init_module - Driver Registration Routine
2827  *
2828  * i40e_init_module is the first routine called when the driver is
2829  * loaded. All it does is register with the PCI subsystem.
2830  **/
2831 static int __init i40evf_init_module(void)
2832 {
2833         int ret;
2834
2835         pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
2836                 i40evf_driver_version);
2837
2838         pr_info("%s\n", i40evf_copyright);
2839
2840         i40evf_wq = alloc_workqueue("%s", WQ_UNBOUND | WQ_MEM_RECLAIM, 1,
2841                                     i40evf_driver_name);
2842         if (!i40evf_wq) {
2843                 pr_err("%s: Failed to create workqueue\n", i40evf_driver_name);
2844                 return -ENOMEM;
2845         }
2846         ret = pci_register_driver(&i40evf_driver);
2847         return ret;
2848 }
2849
2850 module_init(i40evf_init_module);
2851
2852 /**
2853  * i40e_exit_module - Driver Exit Cleanup Routine
2854  *
2855  * i40e_exit_module is called just before the driver is removed
2856  * from memory.
2857  **/
2858 static void __exit i40evf_exit_module(void)
2859 {
2860         pci_unregister_driver(&i40evf_driver);
2861         destroy_workqueue(i40evf_wq);
2862 }
2863
2864 module_exit(i40evf_exit_module);
2865
2866 /* i40evf_main.c */