drivers/net/ethernet/intel/iavf/iavf_main.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright(c) 2013 - 2018 Intel Corporation. */
   3
   4 #include "iavf.h"
   5 #include "iavf_prototype.h"
   6 #include "iavf_client.h"
   7 /* All iavf tracepoints are defined by the include below, which must
   8  * be included exactly once across the whole kernel with
   9  * CREATE_TRACE_POINTS defined
  10  */
  11 #define CREATE_TRACE_POINTS
  12 #include "iavf_trace.h"
  13
  14 static int iavf_setup_all_tx_resources(struct iavf_adapter *adapter);
  15 static int iavf_setup_all_rx_resources(struct iavf_adapter *adapter);
  16 static int iavf_close(struct net_device *netdev);
  17
  18 char iavf_driver_name[] = "iavf";
  19 static const char iavf_driver_string[] =
  20         "Intel(R) Ethernet Adaptive Virtual Function Network Driver";
  21
  22 #define DRV_KERN "-k"
  23
  24 #define DRV_VERSION_MAJOR 3
  25 #define DRV_VERSION_MINOR 2
  26 #define DRV_VERSION_BUILD 3
  27 #define DRV_VERSION __stringify(DRV_VERSION_MAJOR) "." \
  28              __stringify(DRV_VERSION_MINOR) "." \
  29              __stringify(DRV_VERSION_BUILD) \
  30              DRV_KERN
  31 const char iavf_driver_version[] = DRV_VERSION;
  32 static const char iavf_copyright[] =
  33         "Copyright (c) 2013 - 2018 Intel Corporation.";
  34
  35 /* iavf_pci_tbl - PCI Device ID Table
  36  *
  37  * Wildcard entries (PCI_ANY_ID) should come last
  38  * Last entry must be all 0s
  39  *
  40  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  41  *   Class, Class Mask, private data (not used) }
  42  */
  43 static const struct pci_device_id iavf_pci_tbl[] = {
  44         {PCI_VDEVICE(INTEL, IAVF_DEV_ID_VF), 0},
  45         {PCI_VDEVICE(INTEL, IAVF_DEV_ID_VF_HV), 0},
  46         {PCI_VDEVICE(INTEL, IAVF_DEV_ID_X722_VF), 0},
  47         {PCI_VDEVICE(INTEL, IAVF_DEV_ID_ADAPTIVE_VF), 0},
  48         /* required last entry */
  49         {0, }
  50 };
  51
  52 MODULE_DEVICE_TABLE(pci, iavf_pci_tbl);
  53
  54 MODULE_ALIAS("i40evf");
  55 MODULE_AUTHOR("Intel Corporation, <[email protected]>");
  56 MODULE_DESCRIPTION("Intel(R) Ethernet Adaptive Virtual Function Network Driver");
  57 MODULE_LICENSE("GPL v2");
  58 MODULE_VERSION(DRV_VERSION);
  59
  60 static struct workqueue_struct *iavf_wq;
  61
  62 /**
  63  * iavf_allocate_dma_mem_d - OS specific memory alloc for shared code
  64  * @hw:   pointer to the HW structure
  65  * @mem:  ptr to mem struct to fill out
  66  * @size: size of memory requested
  67  * @alignment: what to align the allocation to
  68  **/
  69 iavf_status iavf_allocate_dma_mem_d(struct iavf_hw *hw,
  70                                     struct iavf_dma_mem *mem,
  71                                     u64 size, u32 alignment)
  72 {
  73         struct iavf_adapter *adapter = (struct iavf_adapter *)hw->back;
  74
  75         if (!mem)
  76                 return I40E_ERR_PARAM;
  77
  78         mem->size = ALIGN(size, alignment);
  79         mem->va = dma_alloc_coherent(&adapter->pdev->dev, mem->size,
  80                                      (dma_addr_t *)&mem->pa, GFP_KERNEL);
  81         if (mem->va)
  82                 return 0;
  83         else
  84                 return I40E_ERR_NO_MEMORY;
  85 }
  86
  87 /**
  88  * iavf_free_dma_mem_d - OS specific memory free for shared code
  89  * @hw:   pointer to the HW structure
  90  * @mem:  ptr to mem struct to free
  91  **/
  92 iavf_status iavf_free_dma_mem_d(struct iavf_hw *hw, struct iavf_dma_mem *mem)
  93 {
  94         struct iavf_adapter *adapter = (struct iavf_adapter *)hw->back;
  95
  96         if (!mem || !mem->va)
  97                 return I40E_ERR_PARAM;
  98         dma_free_coherent(&adapter->pdev->dev, mem->size,
  99                           mem->va, (dma_addr_t)mem->pa);
 100         return 0;
 101 }
 102
 103 /**
 104  * iavf_allocate_virt_mem_d - OS specific memory alloc for shared code
 105  * @hw:   pointer to the HW structure
 106  * @mem:  ptr to mem struct to fill out
 107  * @size: size of memory requested
 108  **/
 109 iavf_status iavf_allocate_virt_mem_d(struct iavf_hw *hw,
 110                                      struct iavf_virt_mem *mem, u32 size)
 111 {
 112         if (!mem)
 113                 return I40E_ERR_PARAM;
 114
 115         mem->size = size;
 116         mem->va = kzalloc(size, GFP_KERNEL);
 117
 118         if (mem->va)
 119                 return 0;
 120         else
 121                 return I40E_ERR_NO_MEMORY;
 122 }
 123
 124 /**
 125  * iavf_free_virt_mem_d - OS specific memory free for shared code
 126  * @hw:   pointer to the HW structure
 127  * @mem:  ptr to mem struct to free
 128  **/
 129 iavf_status iavf_free_virt_mem_d(struct iavf_hw *hw, struct iavf_virt_mem *mem)
 130 {
 131         if (!mem)
 132                 return I40E_ERR_PARAM;
 133
 134         /* it's ok to kfree a NULL pointer */
 135         kfree(mem->va);
 136
 137         return 0;
 138 }
 139
 140 /**
 141  * iavf_debug_d - OS dependent version of debug printing
 142  * @hw:  pointer to the HW structure
 143  * @mask: debug level mask
 144  * @fmt_str: printf-type format description
 145  **/
 146 void iavf_debug_d(void *hw, u32 mask, char *fmt_str, ...)
 147 {
 148         char buf[512];
 149         va_list argptr;
 150
 151         if (!(mask & ((struct iavf_hw *)hw)->debug_mask))
 152                 return;
 153
 154         va_start(argptr, fmt_str);
 155         vsnprintf(buf, sizeof(buf), fmt_str, argptr);
 156         va_end(argptr);
 157
 158         /* the debug string is already formatted with a newline */
 159         pr_info("%s", buf);
 160 }
 161
 162 /**
 163  * iavf_schedule_reset - Set the flags and schedule a reset event
 164  * @adapter: board private structure
 165  **/
 166 void iavf_schedule_reset(struct iavf_adapter *adapter)
 167 {
 168         if (!(adapter->flags &
 169               (IAVF_FLAG_RESET_PENDING | IAVF_FLAG_RESET_NEEDED))) {
 170                 adapter->flags |= IAVF_FLAG_RESET_NEEDED;
 171                 schedule_work(&adapter->reset_task);
 172         }
 173 }
 174
 175 /**
 176  * iavf_tx_timeout - Respond to a Tx Hang
 177  * @netdev: network interface device structure
 178  **/
 179 static void iavf_tx_timeout(struct net_device *netdev)
 180 {
 181         struct iavf_adapter *adapter = netdev_priv(netdev);
 182
 183         adapter->tx_timeout_count++;
 184         iavf_schedule_reset(adapter);
 185 }
 186
 187 /**
 188  * iavf_misc_irq_disable - Mask off interrupt generation on the NIC
 189  * @adapter: board private structure
 190  **/
 191 static void iavf_misc_irq_disable(struct iavf_adapter *adapter)
 192 {
 193         struct iavf_hw *hw = &adapter->hw;
 194
 195         if (!adapter->msix_entries)
 196                 return;
 197
 198         wr32(hw, IAVF_VFINT_DYN_CTL01, 0);
 199
 200         iavf_flush(hw);
 201
 202         synchronize_irq(adapter->msix_entries[0].vector);
 203 }
 204
 205 /**
 206  * iavf_misc_irq_enable - Enable default interrupt generation settings
 207  * @adapter: board private structure
 208  **/
 209 static void iavf_misc_irq_enable(struct iavf_adapter *adapter)
 210 {
 211         struct iavf_hw *hw = &adapter->hw;
 212
 213         wr32(hw, IAVF_VFINT_DYN_CTL01, IAVF_VFINT_DYN_CTL01_INTENA_MASK |
 214                                        IAVF_VFINT_DYN_CTL01_ITR_INDX_MASK);
 215         wr32(hw, IAVF_VFINT_ICR0_ENA1, IAVF_VFINT_ICR0_ENA1_ADMINQ_MASK);
 216
 217         iavf_flush(hw);
 218 }
 219
 220 /**
 221  * iavf_irq_disable - Mask off interrupt generation on the NIC
 222  * @adapter: board private structure
 223  **/
 224 static void iavf_irq_disable(struct iavf_adapter *adapter)
 225 {
 226         int i;
 227         struct iavf_hw *hw = &adapter->hw;
 228
 229         if (!adapter->msix_entries)
 230                 return;
 231
 232         for (i = 1; i < adapter->num_msix_vectors; i++) {
 233                 wr32(hw, IAVF_VFINT_DYN_CTLN1(i - 1), 0);
 234                 synchronize_irq(adapter->msix_entries[i].vector);
 235         }
 236         iavf_flush(hw);
 237 }
 238
 239 /**
 240  * iavf_irq_enable_queues - Enable interrupt for specified queues
 241  * @adapter: board private structure
 242  * @mask: bitmap of queues to enable
 243  **/
 244 void iavf_irq_enable_queues(struct iavf_adapter *adapter, u32 mask)
 245 {
 246         struct iavf_hw *hw = &adapter->hw;
 247         int i;
 248
 249         for (i = 1; i < adapter->num_msix_vectors; i++) {
 250                 if (mask & BIT(i - 1)) {
 251                         wr32(hw, IAVF_VFINT_DYN_CTLN1(i - 1),
 252                              IAVF_VFINT_DYN_CTLN1_INTENA_MASK |
 253                              IAVF_VFINT_DYN_CTLN1_ITR_INDX_MASK);
 254                 }
 255         }
 256 }
 257
 258 /**
 259  * iavf_irq_enable - Enable default interrupt generation settings
 260  * @adapter: board private structure
 261  * @flush: boolean value whether to run rd32()
 262  **/
 263 void iavf_irq_enable(struct iavf_adapter *adapter, bool flush)
 264 {
 265         struct iavf_hw *hw = &adapter->hw;
 266
 267         iavf_misc_irq_enable(adapter);
 268         iavf_irq_enable_queues(adapter, ~0);
 269
 270         if (flush)
 271                 iavf_flush(hw);
 272 }
 273
 274 /**
 275  * iavf_msix_aq - Interrupt handler for vector 0
 276  * @irq: interrupt number
 277  * @data: pointer to netdev
 278  **/
 279 static irqreturn_t iavf_msix_aq(int irq, void *data)
 280 {
 281         struct net_device *netdev = data;
 282         struct iavf_adapter *adapter = netdev_priv(netdev);
 283         struct iavf_hw *hw = &adapter->hw;
 284
 285         /* handle non-queue interrupts, these reads clear the registers */
 286         rd32(hw, IAVF_VFINT_ICR01);
 287         rd32(hw, IAVF_VFINT_ICR0_ENA1);
 288
 289         /* schedule work on the private workqueue */
 290         schedule_work(&adapter->adminq_task);
 291
 292         return IRQ_HANDLED;
 293 }
 294
 295 /**
 296  * iavf_msix_clean_rings - MSIX mode Interrupt Handler
 297  * @irq: interrupt number
 298  * @data: pointer to a q_vector
 299  **/
 300 static irqreturn_t iavf_msix_clean_rings(int irq, void *data)
 301 {
 302         struct iavf_q_vector *q_vector = data;
 303
 304         if (!q_vector->tx.ring && !q_vector->rx.ring)
 305                 return IRQ_HANDLED;
 306
 307         napi_schedule_irqoff(&q_vector->napi);
 308
 309         return IRQ_HANDLED;
 310 }
 311
 312 /**
 313  * iavf_map_vector_to_rxq - associate irqs with rx queues
 314  * @adapter: board private structure
 315  * @v_idx: interrupt number
 316  * @r_idx: queue number
 317  **/
 318 static void
 319 iavf_map_vector_to_rxq(struct iavf_adapter *adapter, int v_idx, int r_idx)
 320 {
 321         struct iavf_q_vector *q_vector = &adapter->q_vectors[v_idx];
 322         struct iavf_ring *rx_ring = &adapter->rx_rings[r_idx];
 323         struct iavf_hw *hw = &adapter->hw;
 324
 325         rx_ring->q_vector = q_vector;
 326         rx_ring->next = q_vector->rx.ring;
 327         rx_ring->vsi = &adapter->vsi;
 328         q_vector->rx.ring = rx_ring;
 329         q_vector->rx.count++;
 330         q_vector->rx.next_update = jiffies + 1;
 331         q_vector->rx.target_itr = ITR_TO_REG(rx_ring->itr_setting);
 332         q_vector->ring_mask |= BIT(r_idx);
 333         wr32(hw, IAVF_VFINT_ITRN1(IAVF_RX_ITR, q_vector->reg_idx),
 334              q_vector->rx.current_itr);
 335         q_vector->rx.current_itr = q_vector->rx.target_itr;
 336 }
 337
 338 /**
 339  * iavf_map_vector_to_txq - associate irqs with tx queues
 340  * @adapter: board private structure
 341  * @v_idx: interrupt number
 342  * @t_idx: queue number
 343  **/
 344 static void
 345 iavf_map_vector_to_txq(struct iavf_adapter *adapter, int v_idx, int t_idx)
 346 {
 347         struct iavf_q_vector *q_vector = &adapter->q_vectors[v_idx];
 348         struct iavf_ring *tx_ring = &adapter->tx_rings[t_idx];
 349         struct iavf_hw *hw = &adapter->hw;
 350
 351         tx_ring->q_vector = q_vector;
 352         tx_ring->next = q_vector->tx.ring;
 353         tx_ring->vsi = &adapter->vsi;
 354         q_vector->tx.ring = tx_ring;
 355         q_vector->tx.count++;
 356         q_vector->tx.next_update = jiffies + 1;
 357         q_vector->tx.target_itr = ITR_TO_REG(tx_ring->itr_setting);
 358         q_vector->num_ringpairs++;
 359         wr32(hw, IAVF_VFINT_ITRN1(IAVF_TX_ITR, q_vector->reg_idx),
 360              q_vector->tx.target_itr);
 361         q_vector->tx.current_itr = q_vector->tx.target_itr;
 362 }
 363
 364 /**
 365  * iavf_map_rings_to_vectors - Maps descriptor rings to vectors
 366  * @adapter: board private structure to initialize
 367  *
 368  * This function maps descriptor rings to the queue-specific vectors
 369  * we were allotted through the MSI-X enabling code.  Ideally, we'd have
 370  * one vector per ring/queue, but on a constrained vector budget, we
 371  * group the rings as "efficiently" as possible.  You would add new
 372  * mapping configurations in here.
 373  **/
 374 static void iavf_map_rings_to_vectors(struct iavf_adapter *adapter)
 375 {
 376         int rings_remaining = adapter->num_active_queues;
 377         int ridx = 0, vidx = 0;
 378         int q_vectors;
 379
 380         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 381
 382         for (; ridx < rings_remaining; ridx++) {
 383                 iavf_map_vector_to_rxq(adapter, vidx, ridx);
 384                 iavf_map_vector_to_txq(adapter, vidx, ridx);
 385
 386                 /* In the case where we have more queues than vectors, continue
 387                  * round-robin on vectors until all queues are mapped.
 388                  */
 389                 if (++vidx >= q_vectors)
 390                         vidx = 0;
 391         }
 392
 393         adapter->aq_required |= IAVF_FLAG_AQ_MAP_VECTORS;
 394 }
 395
 396 /**
 397  * iavf_irq_affinity_notify - Callback for affinity changes
 398  * @notify: context as to what irq was changed
 399  * @mask: the new affinity mask
 400  *
 401  * This is a callback function used by the irq_set_affinity_notifier function
 402  * so that we may register to receive changes to the irq affinity masks.
 403  **/
 404 static void iavf_irq_affinity_notify(struct irq_affinity_notify *notify,
 405                                      const cpumask_t *mask)
 406 {
 407         struct iavf_q_vector *q_vector =
 408                 container_of(notify, struct iavf_q_vector, affinity_notify);
 409
 410         cpumask_copy(&q_vector->affinity_mask, mask);
 411 }
 412
 413 /**
 414  * iavf_irq_affinity_release - Callback for affinity notifier release
 415  * @ref: internal core kernel usage
 416  *
 417  * This is a callback function used by the irq_set_affinity_notifier function
 418  * to inform the current notification subscriber that they will no longer
 419  * receive notifications.
 420  **/
 421 static void iavf_irq_affinity_release(struct kref *ref) {}
 422
 423 /**
 424  * iavf_request_traffic_irqs - Initialize MSI-X interrupts
 425  * @adapter: board private structure
 426  * @basename: device basename
 427  *
 428  * Allocates MSI-X vectors for tx and rx handling, and requests
 429  * interrupts from the kernel.
 430  **/
 431 static int
 432 iavf_request_traffic_irqs(struct iavf_adapter *adapter, char *basename)
 433 {
 434         unsigned int vector, q_vectors;
 435         unsigned int rx_int_idx = 0, tx_int_idx = 0;
 436         int irq_num, err;
 437         int cpu;
 438
 439         iavf_irq_disable(adapter);
 440         /* Decrement for Other and TCP Timer vectors */
 441         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 442
 443         for (vector = 0; vector < q_vectors; vector++) {
 444                 struct iavf_q_vector *q_vector = &adapter->q_vectors[vector];
 445
 446                 irq_num = adapter->msix_entries[vector + NONQ_VECS].vector;
 447
 448                 if (q_vector->tx.ring && q_vector->rx.ring) {
 449                         snprintf(q_vector->name, sizeof(q_vector->name),
 450                                  "iavf-%s-TxRx-%d", basename, rx_int_idx++);
 451                         tx_int_idx++;
 452                 } else if (q_vector->rx.ring) {
 453                         snprintf(q_vector->name, sizeof(q_vector->name),
 454                                  "iavf-%s-rx-%d", basename, rx_int_idx++);
 455                 } else if (q_vector->tx.ring) {
 456                         snprintf(q_vector->name, sizeof(q_vector->name),
 457                                  "iavf-%s-tx-%d", basename, tx_int_idx++);
 458                 } else {
 459                         /* skip this unused q_vector */
 460                         continue;
 461                 }
 462                 err = request_irq(irq_num,
 463                                   iavf_msix_clean_rings,
 464                                   0,
 465                                   q_vector->name,
 466                                   q_vector);
 467                 if (err) {
 468                         dev_info(&adapter->pdev->dev,
 469                                  "Request_irq failed, error: %d\n", err);
 470                         goto free_queue_irqs;
 471                 }
 472                 /* register for affinity change notifications */
 473                 q_vector->affinity_notify.notify = iavf_irq_affinity_notify;
 474                 q_vector->affinity_notify.release =
 475                                                    iavf_irq_affinity_release;
 476                 irq_set_affinity_notifier(irq_num, &q_vector->affinity_notify);
 477                 /* Spread the IRQ affinity hints across online CPUs. Note that
 478                  * get_cpu_mask returns a mask with a permanent lifetime so
 479                  * it's safe to use as a hint for irq_set_affinity_hint.
 480                  */
 481                 cpu = cpumask_local_spread(q_vector->v_idx, -1);
 482                 irq_set_affinity_hint(irq_num, get_cpu_mask(cpu));
 483         }
 484
 485         return 0;
 486
 487 free_queue_irqs:
 488         while (vector) {
 489                 vector--;
 490                 irq_num = adapter->msix_entries[vector + NONQ_VECS].vector;
 491                 irq_set_affinity_notifier(irq_num, NULL);
 492                 irq_set_affinity_hint(irq_num, NULL);
 493                 free_irq(irq_num, &adapter->q_vectors[vector]);
 494         }
 495         return err;
 496 }
 497
 498 /**
 499  * iavf_request_misc_irq - Initialize MSI-X interrupts
 500  * @adapter: board private structure
 501  *
 502  * Allocates MSI-X vector 0 and requests interrupts from the kernel. This
 503  * vector is only for the admin queue, and stays active even when the netdev
 504  * is closed.
 505  **/
 506 static int iavf_request_misc_irq(struct iavf_adapter *adapter)
 507 {
 508         struct net_device *netdev = adapter->netdev;
 509         int err;
 510
 511         snprintf(adapter->misc_vector_name,
 512                  sizeof(adapter->misc_vector_name) - 1, "iavf-%s:mbx",
 513                  dev_name(&adapter->pdev->dev));
 514         err = request_irq(adapter->msix_entries[0].vector,
 515                           &iavf_msix_aq, 0,
 516                           adapter->misc_vector_name, netdev);
 517         if (err) {
 518                 dev_err(&adapter->pdev->dev,
 519                         "request_irq for %s failed: %d\n",
 520                         adapter->misc_vector_name, err);
 521                 free_irq(adapter->msix_entries[0].vector, netdev);
 522         }
 523         return err;
 524 }
 525
 526 /**
 527  * iavf_free_traffic_irqs - Free MSI-X interrupts
 528  * @adapter: board private structure
 529  *
 530  * Frees all MSI-X vectors other than 0.
 531  **/
 532 static void iavf_free_traffic_irqs(struct iavf_adapter *adapter)
 533 {
 534         int vector, irq_num, q_vectors;
 535
 536         if (!adapter->msix_entries)
 537                 return;
 538
 539         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 540
 541         for (vector = 0; vector < q_vectors; vector++) {
 542                 irq_num = adapter->msix_entries[vector + NONQ_VECS].vector;
 543                 irq_set_affinity_notifier(irq_num, NULL);
 544                 irq_set_affinity_hint(irq_num, NULL);
 545                 free_irq(irq_num, &adapter->q_vectors[vector]);
 546         }
 547 }
 548
 549 /**
 550  * iavf_free_misc_irq - Free MSI-X miscellaneous vector
 551  * @adapter: board private structure
 552  *
 553  * Frees MSI-X vector 0.
 554  **/
 555 static void iavf_free_misc_irq(struct iavf_adapter *adapter)
 556 {
 557         struct net_device *netdev = adapter->netdev;
 558
 559         if (!adapter->msix_entries)
 560                 return;
 561
 562         free_irq(adapter->msix_entries[0].vector, netdev);
 563 }
 564
 565 /**
 566  * iavf_configure_tx - Configure Transmit Unit after Reset
 567  * @adapter: board private structure
 568  *
 569  * Configure the Tx unit of the MAC after a reset.
 570  **/
 571 static void iavf_configure_tx(struct iavf_adapter *adapter)
 572 {
 573         struct iavf_hw *hw = &adapter->hw;
 574         int i;
 575
 576         for (i = 0; i < adapter->num_active_queues; i++)
 577                 adapter->tx_rings[i].tail = hw->hw_addr + IAVF_QTX_TAIL1(i);
 578 }
 579
 580 /**
 581  * iavf_configure_rx - Configure Receive Unit after Reset
 582  * @adapter: board private structure
 583  *
 584  * Configure the Rx unit of the MAC after a reset.
 585  **/
 586 static void iavf_configure_rx(struct iavf_adapter *adapter)
 587 {
 588         unsigned int rx_buf_len = IAVF_RXBUFFER_2048;
 589         struct iavf_hw *hw = &adapter->hw;
 590         int i;
 591
 592         /* Legacy Rx will always default to a 2048 buffer size. */
 593 #if (PAGE_SIZE < 8192)
 594         if (!(adapter->flags & IAVF_FLAG_LEGACY_RX)) {
 595                 struct net_device *netdev = adapter->netdev;
 596
 597                 /* For jumbo frames on systems with 4K pages we have to use
 598                  * an order 1 page, so we might as well increase the size
 599                  * of our Rx buffer to make better use of the available space
 600                  */
 601                 rx_buf_len = IAVF_RXBUFFER_3072;
 602
 603                 /* We use a 1536 buffer size for configurations with
 604                  * standard Ethernet mtu.  On x86 this gives us enough room
 605                  * for shared info and 192 bytes of padding.
 606                  */
 607                 if (!IAVF_2K_TOO_SMALL_WITH_PADDING &&
 608                     (netdev->mtu <= ETH_DATA_LEN))
 609                         rx_buf_len = IAVF_RXBUFFER_1536 - NET_IP_ALIGN;
 610         }
 611 #endif
 612
 613         for (i = 0; i < adapter->num_active_queues; i++) {
 614                 adapter->rx_rings[i].tail = hw->hw_addr + IAVF_QRX_TAIL1(i);
 615                 adapter->rx_rings[i].rx_buf_len = rx_buf_len;
 616
 617                 if (adapter->flags & IAVF_FLAG_LEGACY_RX)
 618                         clear_ring_build_skb_enabled(&adapter->rx_rings[i]);
 619                 else
 620                         set_ring_build_skb_enabled(&adapter->rx_rings[i]);
 621         }
 622 }
 623
 624 /**
 625  * iavf_find_vlan - Search filter list for specific vlan filter
 626  * @adapter: board private structure
 627  * @vlan: vlan tag
 628  *
 629  * Returns ptr to the filter object or NULL. Must be called while holding the
 630  * mac_vlan_list_lock.
 631  **/
 632 static struct
 633 iavf_vlan_filter *iavf_find_vlan(struct iavf_adapter *adapter, u16 vlan)
 634 {
 635         struct iavf_vlan_filter *f;
 636
 637         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
 638                 if (vlan == f->vlan)
 639                         return f;
 640         }
 641         return NULL;
 642 }
 643
 644 /**
 645  * iavf_add_vlan - Add a vlan filter to the list
 646  * @adapter: board private structure
 647  * @vlan: VLAN tag
 648  *
 649  * Returns ptr to the filter object or NULL when no memory available.
 650  **/
 651 static struct
 652 iavf_vlan_filter *iavf_add_vlan(struct iavf_adapter *adapter, u16 vlan)
 653 {
 654         struct iavf_vlan_filter *f = NULL;
 655
 656         spin_lock_bh(&adapter->mac_vlan_list_lock);
 657
 658         f = iavf_find_vlan(adapter, vlan);
 659         if (!f) {
 660                 f = kzalloc(sizeof(*f), GFP_KERNEL);
 661                 if (!f)
 662                         goto clearout;
 663
 664                 f->vlan = vlan;
 665
 666                 INIT_LIST_HEAD(&f->list);
 667                 list_add(&f->list, &adapter->vlan_filter_list);
 668                 f->add = true;
 669                 adapter->aq_required |= IAVF_FLAG_AQ_ADD_VLAN_FILTER;
 670         }
 671
 672 clearout:
 673         spin_unlock_bh(&adapter->mac_vlan_list_lock);
 674         return f;
 675 }
 676
 677 /**
 678  * iavf_del_vlan - Remove a vlan filter from the list
 679  * @adapter: board private structure
 680  * @vlan: VLAN tag
 681  **/
 682 static void iavf_del_vlan(struct iavf_adapter *adapter, u16 vlan)
 683 {
 684         struct iavf_vlan_filter *f;
 685
 686         spin_lock_bh(&adapter->mac_vlan_list_lock);
 687
 688         f = iavf_find_vlan(adapter, vlan);
 689         if (f) {
 690                 f->remove = true;
 691                 adapter->aq_required |= IAVF_FLAG_AQ_DEL_VLAN_FILTER;
 692         }
 693
 694         spin_unlock_bh(&adapter->mac_vlan_list_lock);
 695 }
 696
 697 /**
 698  * iavf_vlan_rx_add_vid - Add a VLAN filter to a device
 699  * @netdev: network device struct
 700  * @proto: unused protocol data
 701  * @vid: VLAN tag
 702  **/
 703 static int iavf_vlan_rx_add_vid(struct net_device *netdev,
 704                                 __always_unused __be16 proto, u16 vid)
 705 {
 706         struct iavf_adapter *adapter = netdev_priv(netdev);
 707
 708         if (!VLAN_ALLOWED(adapter))
 709                 return -EIO;
 710         if (iavf_add_vlan(adapter, vid) == NULL)
 711                 return -ENOMEM;
 712         return 0;
 713 }
 714
 715 /**
 716  * iavf_vlan_rx_kill_vid - Remove a VLAN filter from a device
 717  * @netdev: network device struct
 718  * @proto: unused protocol data
 719  * @vid: VLAN tag
 720  **/
 721 static int iavf_vlan_rx_kill_vid(struct net_device *netdev,
 722                                  __always_unused __be16 proto, u16 vid)
 723 {
 724         struct iavf_adapter *adapter = netdev_priv(netdev);
 725
 726         if (VLAN_ALLOWED(adapter)) {
 727                 iavf_del_vlan(adapter, vid);
 728                 return 0;
 729         }
 730         return -EIO;
 731 }
 732
 733 /**
 734  * iavf_find_filter - Search filter list for specific mac filter
 735  * @adapter: board private structure
 736  * @macaddr: the MAC address
 737  *
 738  * Returns ptr to the filter object or NULL. Must be called while holding the
 739  * mac_vlan_list_lock.
 740  **/
 741 static struct
 742 iavf_mac_filter *iavf_find_filter(struct iavf_adapter *adapter,
 743                                   const u8 *macaddr)
 744 {
 745         struct iavf_mac_filter *f;
 746
 747         if (!macaddr)
 748                 return NULL;
 749
 750         list_for_each_entry(f, &adapter->mac_filter_list, list) {
 751                 if (ether_addr_equal(macaddr, f->macaddr))
 752                         return f;
 753         }
 754         return NULL;
 755 }
 756
 757 /**
 758  * iavf_add_filter - Add a mac filter to the filter list
 759  * @adapter: board private structure
 760  * @macaddr: the MAC address
 761  *
 762  * Returns ptr to the filter object or NULL when no memory available.
 763  **/
 764 static struct
 765 iavf_mac_filter *iavf_add_filter(struct iavf_adapter *adapter,
 766                                  const u8 *macaddr)
 767 {
 768         struct iavf_mac_filter *f;
 769
 770         if (!macaddr)
 771                 return NULL;
 772
 773         f = iavf_find_filter(adapter, macaddr);
 774         if (!f) {
 775                 f = kzalloc(sizeof(*f), GFP_ATOMIC);
 776                 if (!f)
 777                         return f;
 778
 779                 ether_addr_copy(f->macaddr, macaddr);
 780
 781                 list_add_tail(&f->list, &adapter->mac_filter_list);
 782                 f->add = true;
 783                 adapter->aq_required |= IAVF_FLAG_AQ_ADD_MAC_FILTER;
 784         } else {
 785                 f->remove = false;
 786         }
 787
 788         return f;
 789 }
 790
 791 /**
 792  * iavf_set_mac - NDO callback to set port mac address
 793  * @netdev: network interface device structure
 794  * @p: pointer to an address structure
 795  *
 796  * Returns 0 on success, negative on failure
 797  **/
 798 static int iavf_set_mac(struct net_device *netdev, void *p)
 799 {
 800         struct iavf_adapter *adapter = netdev_priv(netdev);
 801         struct iavf_hw *hw = &adapter->hw;
 802         struct iavf_mac_filter *f;
 803         struct sockaddr *addr = p;
 804
 805         if (!is_valid_ether_addr(addr->sa_data))
 806                 return -EADDRNOTAVAIL;
 807
 808         if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
 809                 return 0;
 810
 811         if (adapter->flags & IAVF_FLAG_ADDR_SET_BY_PF)
 812                 return -EPERM;
 813
 814         spin_lock_bh(&adapter->mac_vlan_list_lock);
 815
 816         f = iavf_find_filter(adapter, hw->mac.addr);
 817         if (f) {
 818                 f->remove = true;
 819                 adapter->aq_required |= IAVF_FLAG_AQ_DEL_MAC_FILTER;
 820         }
 821
 822         f = iavf_add_filter(adapter, addr->sa_data);
 823
 824         spin_unlock_bh(&adapter->mac_vlan_list_lock);
 825
 826         if (f) {
 827                 ether_addr_copy(hw->mac.addr, addr->sa_data);
 828                 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
 829         }
 830
 831         return (f == NULL) ? -ENOMEM : 0;
 832 }
 833
 834 /**
 835  * iavf_addr_sync - Callback for dev_(mc|uc)_sync to add address
 836  * @netdev: the netdevice
 837  * @addr: address to add
 838  *
 839  * Called by __dev_(mc|uc)_sync when an address needs to be added. We call
 840  * __dev_(uc|mc)_sync from .set_rx_mode and guarantee to hold the hash lock.
 841  */
 842 static int iavf_addr_sync(struct net_device *netdev, const u8 *addr)
 843 {
 844         struct iavf_adapter *adapter = netdev_priv(netdev);
 845
 846         if (iavf_add_filter(adapter, addr))
 847                 return 0;
 848         else
 849                 return -ENOMEM;
 850 }
 851
 852 /**
 853  * iavf_addr_unsync - Callback for dev_(mc|uc)_sync to remove address
 854  * @netdev: the netdevice
 855  * @addr: address to add
 856  *
 857  * Called by __dev_(mc|uc)_sync when an address needs to be removed. We call
 858  * __dev_(uc|mc)_sync from .set_rx_mode and guarantee to hold the hash lock.
 859  */
 860 static int iavf_addr_unsync(struct net_device *netdev, const u8 *addr)
 861 {
 862         struct iavf_adapter *adapter = netdev_priv(netdev);
 863         struct iavf_mac_filter *f;
 864
 865         /* Under some circumstances, we might receive a request to delete
 866          * our own device address from our uc list. Because we store the
 867          * device address in the VSI's MAC/VLAN filter list, we need to ignore
 868          * such requests and not delete our device address from this list.
 869          */
 870         if (ether_addr_equal(addr, netdev->dev_addr))
 871                 return 0;
 872
 873         f = iavf_find_filter(adapter, addr);
 874         if (f) {
 875                 f->remove = true;
 876                 adapter->aq_required |= IAVF_FLAG_AQ_DEL_MAC_FILTER;
 877         }
 878         return 0;
 879 }
 880
 881 /**
 882  * iavf_set_rx_mode - NDO callback to set the netdev filters
 883  * @netdev: network interface device structure
 884  **/
 885 static void iavf_set_rx_mode(struct net_device *netdev)
 886 {
 887         struct iavf_adapter *adapter = netdev_priv(netdev);
 888
 889         spin_lock_bh(&adapter->mac_vlan_list_lock);
 890         __dev_uc_sync(netdev, iavf_addr_sync, iavf_addr_unsync);
 891         __dev_mc_sync(netdev, iavf_addr_sync, iavf_addr_unsync);
 892         spin_unlock_bh(&adapter->mac_vlan_list_lock);
 893
 894         if (netdev->flags & IFF_PROMISC &&
 895             !(adapter->flags & IAVF_FLAG_PROMISC_ON))
 896                 adapter->aq_required |= IAVF_FLAG_AQ_REQUEST_PROMISC;
 897         else if (!(netdev->flags & IFF_PROMISC) &&
 898                  adapter->flags & IAVF_FLAG_PROMISC_ON)
 899                 adapter->aq_required |= IAVF_FLAG_AQ_RELEASE_PROMISC;
 900
 901         if (netdev->flags & IFF_ALLMULTI &&
 902             !(adapter->flags & IAVF_FLAG_ALLMULTI_ON))
 903                 adapter->aq_required |= IAVF_FLAG_AQ_REQUEST_ALLMULTI;
 904         else if (!(netdev->flags & IFF_ALLMULTI) &&
 905                  adapter->flags & IAVF_FLAG_ALLMULTI_ON)
 906                 adapter->aq_required |= IAVF_FLAG_AQ_RELEASE_ALLMULTI;
 907 }
 908
 909 /**
 910  * iavf_napi_enable_all - enable NAPI on all queue vectors
 911  * @adapter: board private structure
 912  **/
 913 static void iavf_napi_enable_all(struct iavf_adapter *adapter)
 914 {
 915         int q_idx;
 916         struct iavf_q_vector *q_vector;
 917         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 918
 919         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
 920                 struct napi_struct *napi;
 921
 922                 q_vector = &adapter->q_vectors[q_idx];
 923                 napi = &q_vector->napi;
 924                 napi_enable(napi);
 925         }
 926 }
 927
 928 /**
 929  * iavf_napi_disable_all - disable NAPI on all queue vectors
 930  * @adapter: board private structure
 931  **/
 932 static void iavf_napi_disable_all(struct iavf_adapter *adapter)
 933 {
 934         int q_idx;
 935         struct iavf_q_vector *q_vector;
 936         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 937
 938         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
 939                 q_vector = &adapter->q_vectors[q_idx];
 940                 napi_disable(&q_vector->napi);
 941         }
 942 }
 943
 944 /**
 945  * iavf_configure - set up transmit and receive data structures
 946  * @adapter: board private structure
 947  **/
 948 static void iavf_configure(struct iavf_adapter *adapter)
 949 {
 950         struct net_device *netdev = adapter->netdev;
 951         int i;
 952
 953         iavf_set_rx_mode(netdev);
 954
 955         iavf_configure_tx(adapter);
 956         iavf_configure_rx(adapter);
 957         adapter->aq_required |= IAVF_FLAG_AQ_CONFIGURE_QUEUES;
 958
 959         for (i = 0; i < adapter->num_active_queues; i++) {
 960                 struct iavf_ring *ring = &adapter->rx_rings[i];
 961
 962                 iavf_alloc_rx_buffers(ring, IAVF_DESC_UNUSED(ring));
 963         }
 964 }
 965
 966 /**
 967  * iavf_up_complete - Finish the last steps of bringing up a connection
 968  * @adapter: board private structure
 969  *
 970  * Expects to be called while holding the __IAVF_IN_CRITICAL_TASK bit lock.
 971  **/
 972 static void iavf_up_complete(struct iavf_adapter *adapter)
 973 {
 974         adapter->state = __IAVF_RUNNING;
 975         clear_bit(__IAVF_VSI_DOWN, adapter->vsi.state);
 976
 977         iavf_napi_enable_all(adapter);
 978
 979         adapter->aq_required |= IAVF_FLAG_AQ_ENABLE_QUEUES;
 980         if (CLIENT_ENABLED(adapter))
 981                 adapter->flags |= IAVF_FLAG_CLIENT_NEEDS_OPEN;
 982         mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
 983 }
 984
 985 /**
 986  * iavf_down - Shutdown the connection processing
 987  * @adapter: board private structure
 988  *
 989  * Expects to be called while holding the __IAVF_IN_CRITICAL_TASK bit lock.
 990  **/
 991 void iavf_down(struct iavf_adapter *adapter)
 992 {
 993         struct net_device *netdev = adapter->netdev;
 994         struct iavf_vlan_filter *vlf;
 995         struct iavf_mac_filter *f;
 996         struct iavf_cloud_filter *cf;
 997
 998         if (adapter->state <= __IAVF_DOWN_PENDING)
 999                 return;
1000
1001         netif_carrier_off(netdev);
1002         netif_tx_disable(netdev);
1003         adapter->link_up = false;
1004         iavf_napi_disable_all(adapter);
1005         iavf_irq_disable(adapter);
1006
1007         spin_lock_bh(&adapter->mac_vlan_list_lock);
1008
1009         /* clear the sync flag on all filters */
1010         __dev_uc_unsync(adapter->netdev, NULL);
1011         __dev_mc_unsync(adapter->netdev, NULL);
1012
1013         /* remove all MAC filters */
1014         list_for_each_entry(f, &adapter->mac_filter_list, list) {
1015                 f->remove = true;
1016         }
1017
1018         /* remove all VLAN filters */
1019         list_for_each_entry(vlf, &adapter->vlan_filter_list, list) {
1020                 vlf->remove = true;
1021         }
1022
1023         spin_unlock_bh(&adapter->mac_vlan_list_lock);
1024
1025         /* remove all cloud filters */
1026         spin_lock_bh(&adapter->cloud_filter_list_lock);
1027         list_for_each_entry(cf, &adapter->cloud_filter_list, list) {
1028                 cf->del = true;
1029         }
1030         spin_unlock_bh(&adapter->cloud_filter_list_lock);
1031
1032         if (!(adapter->flags & IAVF_FLAG_PF_COMMS_FAILED) &&
1033             adapter->state != __IAVF_RESETTING) {
1034                 /* cancel any current operation */
1035                 adapter->current_op = VIRTCHNL_OP_UNKNOWN;
1036                 /* Schedule operations to close down the HW. Don't wait
1037                  * here for this to complete. The watchdog is still running
1038                  * and it will take care of this.
1039                  */
1040                 adapter->aq_required = IAVF_FLAG_AQ_DEL_MAC_FILTER;
1041                 adapter->aq_required |= IAVF_FLAG_AQ_DEL_VLAN_FILTER;
1042                 adapter->aq_required |= IAVF_FLAG_AQ_DEL_CLOUD_FILTER;
1043                 adapter->aq_required |= IAVF_FLAG_AQ_DISABLE_QUEUES;
1044         }
1045
1046         mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
1047 }
1048
1049 /**
1050  * iavf_acquire_msix_vectors - Setup the MSIX capability
1051  * @adapter: board private structure
1052  * @vectors: number of vectors to request
1053  *
1054  * Work with the OS to set up the MSIX vectors needed.
1055  *
1056  * Returns 0 on success, negative on failure
1057  **/
1058 static int
1059 iavf_acquire_msix_vectors(struct iavf_adapter *adapter, int vectors)
1060 {
1061         int err, vector_threshold;
1062
1063         /* We'll want at least 3 (vector_threshold):
1064          * 0) Other (Admin Queue and link, mostly)
1065          * 1) TxQ[0] Cleanup
1066          * 2) RxQ[0] Cleanup
1067          */
1068         vector_threshold = MIN_MSIX_COUNT;
1069
1070         /* The more we get, the more we will assign to Tx/Rx Cleanup
1071          * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1072          * Right now, we simply care about how many we'll get; we'll
1073          * set them up later while requesting irq's.
1074          */
1075         err = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
1076                                     vector_threshold, vectors);
1077         if (err < 0) {
1078                 dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts\n");
1079                 kfree(adapter->msix_entries);
1080                 adapter->msix_entries = NULL;
1081                 return err;
1082         }
1083
1084         /* Adjust for only the vectors we'll use, which is minimum
1085          * of max_msix_q_vectors + NONQ_VECS, or the number of
1086          * vectors we were allocated.
1087          */
1088         adapter->num_msix_vectors = err;
1089         return 0;
1090 }
1091
1092 /**
1093  * iavf_free_queues - Free memory for all rings
1094  * @adapter: board private structure to initialize
1095  *
1096  * Free all of the memory associated with queue pairs.
1097  **/
1098 static void iavf_free_queues(struct iavf_adapter *adapter)
1099 {
1100         if (!adapter->vsi_res)
1101                 return;
1102         adapter->num_active_queues = 0;
1103         kfree(adapter->tx_rings);
1104         adapter->tx_rings = NULL;
1105         kfree(adapter->rx_rings);
1106         adapter->rx_rings = NULL;
1107 }
1108
1109 /**
1110  * iavf_alloc_queues - Allocate memory for all rings
1111  * @adapter: board private structure to initialize
1112  *
1113  * We allocate one ring per queue at run-time since we don't know the
1114  * number of queues at compile-time.  The polling_netdev array is
1115  * intended for Multiqueue, but should work fine with a single queue.
1116  **/
1117 static int iavf_alloc_queues(struct iavf_adapter *adapter)
1118 {
1119         int i, num_active_queues;
1120
1121         /* If we're in reset reallocating queues we don't actually know yet for
1122          * certain the PF gave us the number of queues we asked for but we'll
1123          * assume it did.  Once basic reset is finished we'll confirm once we
1124          * start negotiating config with PF.
1125          */
1126         if (adapter->num_req_queues)
1127                 num_active_queues = adapter->num_req_queues;
1128         else if ((adapter->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_ADQ) &&
1129                  adapter->num_tc)
1130                 num_active_queues = adapter->ch_config.total_qps;
1131         else
1132                 num_active_queues = min_t(int,
1133                                           adapter->vsi_res->num_queue_pairs,
1134                                           (int)(num_online_cpus()));
1135
1136
1137         adapter->tx_rings = kcalloc(num_active_queues,
1138                                     sizeof(struct iavf_ring), GFP_KERNEL);
1139         if (!adapter->tx_rings)
1140                 goto err_out;
1141         adapter->rx_rings = kcalloc(num_active_queues,
1142                                     sizeof(struct iavf_ring), GFP_KERNEL);
1143         if (!adapter->rx_rings)
1144                 goto err_out;
1145
1146         for (i = 0; i < num_active_queues; i++) {
1147                 struct iavf_ring *tx_ring;
1148                 struct iavf_ring *rx_ring;
1149
1150                 tx_ring = &adapter->tx_rings[i];
1151
1152                 tx_ring->queue_index = i;
1153                 tx_ring->netdev = adapter->netdev;
1154                 tx_ring->dev = &adapter->pdev->dev;
1155                 tx_ring->count = adapter->tx_desc_count;
1156                 tx_ring->itr_setting = IAVF_ITR_TX_DEF;
1157                 if (adapter->flags & IAVF_FLAG_WB_ON_ITR_CAPABLE)
1158                         tx_ring->flags |= IAVF_TXR_FLAGS_WB_ON_ITR;
1159
1160                 rx_ring = &adapter->rx_rings[i];
1161                 rx_ring->queue_index = i;
1162                 rx_ring->netdev = adapter->netdev;
1163                 rx_ring->dev = &adapter->pdev->dev;
1164                 rx_ring->count = adapter->rx_desc_count;
1165                 rx_ring->itr_setting = IAVF_ITR_RX_DEF;
1166         }
1167
1168         adapter->num_active_queues = num_active_queues;
1169
1170         return 0;
1171
1172 err_out:
1173         iavf_free_queues(adapter);
1174         return -ENOMEM;
1175 }
1176
1177 /**
1178  * iavf_set_interrupt_capability - set MSI-X or FAIL if not supported
1179  * @adapter: board private structure to initialize
1180  *
1181  * Attempt to configure the interrupts using the best available
1182  * capabilities of the hardware and the kernel.
1183  **/
1184 static int iavf_set_interrupt_capability(struct iavf_adapter *adapter)
1185 {
1186         int vector, v_budget;
1187         int pairs = 0;
1188         int err = 0;
1189
1190         if (!adapter->vsi_res) {
1191                 err = -EIO;
1192                 goto out;
1193         }
1194         pairs = adapter->num_active_queues;
1195
1196         /* It's easy to be greedy for MSI-X vectors, but it really doesn't do
1197          * us much good if we have more vectors than CPUs. However, we already
1198          * limit the total number of queues by the number of CPUs so we do not
1199          * need any further limiting here.
1200          */
1201         v_budget = min_t(int, pairs + NONQ_VECS,
1202                          (int)adapter->vf_res->max_vectors);
1203
1204         adapter->msix_entries = kcalloc(v_budget,
1205                                         sizeof(struct msix_entry), GFP_KERNEL);
1206         if (!adapter->msix_entries) {
1207                 err = -ENOMEM;
1208                 goto out;
1209         }
1210
1211         for (vector = 0; vector < v_budget; vector++)
1212                 adapter->msix_entries[vector].entry = vector;
1213
1214         err = iavf_acquire_msix_vectors(adapter, v_budget);
1215
1216 out:
1217         netif_set_real_num_rx_queues(adapter->netdev, pairs);
1218         netif_set_real_num_tx_queues(adapter->netdev, pairs);
1219         return err;
1220 }
1221
1222 /**
1223  * iavf_config_rss_aq - Configure RSS keys and lut by using AQ commands
1224  * @adapter: board private structure
1225  *
1226  * Return 0 on success, negative on failure
1227  **/
1228 static int iavf_config_rss_aq(struct iavf_adapter *adapter)
1229 {
1230         struct i40e_aqc_get_set_rss_key_data *rss_key =
1231                 (struct i40e_aqc_get_set_rss_key_data *)adapter->rss_key;
1232         struct iavf_hw *hw = &adapter->hw;
1233         int ret = 0;
1234
1235         if (adapter->current_op != VIRTCHNL_OP_UNKNOWN) {
1236                 /* bail because we already have a command pending */
1237                 dev_err(&adapter->pdev->dev, "Cannot configure RSS, command %d pending\n",
1238                         adapter->current_op);
1239                 return -EBUSY;
1240         }
1241
1242         ret = iavf_aq_set_rss_key(hw, adapter->vsi.id, rss_key);
1243         if (ret) {
1244                 dev_err(&adapter->pdev->dev, "Cannot set RSS key, err %s aq_err %s\n",
1245                         iavf_stat_str(hw, ret),
1246                         iavf_aq_str(hw, hw->aq.asq_last_status));
1247                 return ret;
1248
1249         }
1250
1251         ret = iavf_aq_set_rss_lut(hw, adapter->vsi.id, false,
1252                                   adapter->rss_lut, adapter->rss_lut_size);
1253         if (ret) {
1254                 dev_err(&adapter->pdev->dev, "Cannot set RSS lut, err %s aq_err %s\n",
1255                         iavf_stat_str(hw, ret),
1256                         iavf_aq_str(hw, hw->aq.asq_last_status));
1257         }
1258
1259         return ret;
1260
1261 }
1262
1263 /**
1264  * iavf_config_rss_reg - Configure RSS keys and lut by writing registers
1265  * @adapter: board private structure
1266  *
1267  * Returns 0 on success, negative on failure
1268  **/
1269 static int iavf_config_rss_reg(struct iavf_adapter *adapter)
1270 {
1271         struct iavf_hw *hw = &adapter->hw;
1272         u32 *dw;
1273         u16 i;
1274
1275         dw = (u32 *)adapter->rss_key;
1276         for (i = 0; i <= adapter->rss_key_size / 4; i++)
1277                 wr32(hw, IAVF_VFQF_HKEY(i), dw[i]);
1278
1279         dw = (u32 *)adapter->rss_lut;
1280         for (i = 0; i <= adapter->rss_lut_size / 4; i++)
1281                 wr32(hw, IAVF_VFQF_HLUT(i), dw[i]);
1282
1283         iavf_flush(hw);
1284
1285         return 0;
1286 }
1287
1288 /**
1289  * iavf_config_rss - Configure RSS keys and lut
1290  * @adapter: board private structure
1291  *
1292  * Returns 0 on success, negative on failure
1293  **/
1294 int iavf_config_rss(struct iavf_adapter *adapter)
1295 {
1296
1297         if (RSS_PF(adapter)) {
1298                 adapter->aq_required |= IAVF_FLAG_AQ_SET_RSS_LUT |
1299                                         IAVF_FLAG_AQ_SET_RSS_KEY;
1300                 return 0;
1301         } else if (RSS_AQ(adapter)) {
1302                 return iavf_config_rss_aq(adapter);
1303         } else {
1304                 return iavf_config_rss_reg(adapter);
1305         }
1306 }
1307
1308 /**
1309  * iavf_fill_rss_lut - Fill the lut with default values
1310  * @adapter: board private structure
1311  **/
1312 static void iavf_fill_rss_lut(struct iavf_adapter *adapter)
1313 {
1314         u16 i;
1315
1316         for (i = 0; i < adapter->rss_lut_size; i++)
1317                 adapter->rss_lut[i] = i % adapter->num_active_queues;
1318 }
1319
1320 /**
1321  * iavf_init_rss - Prepare for RSS
1322  * @adapter: board private structure
1323  *
1324  * Return 0 on success, negative on failure
1325  **/
1326 static int iavf_init_rss(struct iavf_adapter *adapter)
1327 {
1328         struct iavf_hw *hw = &adapter->hw;
1329         int ret;
1330
1331         if (!RSS_PF(adapter)) {
1332                 /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
1333                 if (adapter->vf_res->vf_cap_flags &
1334                     VIRTCHNL_VF_OFFLOAD_RSS_PCTYPE_V2)
1335                         adapter->hena = IAVF_DEFAULT_RSS_HENA_EXPANDED;
1336                 else
1337                         adapter->hena = IAVF_DEFAULT_RSS_HENA;
1338
1339                 wr32(hw, IAVF_VFQF_HENA(0), (u32)adapter->hena);
1340                 wr32(hw, IAVF_VFQF_HENA(1), (u32)(adapter->hena >> 32));
1341         }
1342
1343         iavf_fill_rss_lut(adapter);
1344         netdev_rss_key_fill((void *)adapter->rss_key, adapter->rss_key_size);
1345         ret = iavf_config_rss(adapter);
1346
1347         return ret;
1348 }
1349
1350 /**
1351  * iavf_alloc_q_vectors - Allocate memory for interrupt vectors
1352  * @adapter: board private structure to initialize
1353  *
1354  * We allocate one q_vector per queue interrupt.  If allocation fails we
1355  * return -ENOMEM.
1356  **/
1357 static int iavf_alloc_q_vectors(struct iavf_adapter *adapter)
1358 {
1359         int q_idx = 0, num_q_vectors;
1360         struct iavf_q_vector *q_vector;
1361
1362         num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1363         adapter->q_vectors = kcalloc(num_q_vectors, sizeof(*q_vector),
1364                                      GFP_KERNEL);
1365         if (!adapter->q_vectors)
1366                 return -ENOMEM;
1367
1368         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1369                 q_vector = &adapter->q_vectors[q_idx];
1370                 q_vector->adapter = adapter;
1371                 q_vector->vsi = &adapter->vsi;
1372                 q_vector->v_idx = q_idx;
1373                 q_vector->reg_idx = q_idx;
1374                 cpumask_copy(&q_vector->affinity_mask, cpu_possible_mask);
1375                 netif_napi_add(adapter->netdev, &q_vector->napi,
1376                                iavf_napi_poll, NAPI_POLL_WEIGHT);
1377         }
1378
1379         return 0;
1380 }
1381
1382 /**
1383  * iavf_free_q_vectors - Free memory allocated for interrupt vectors
1384  * @adapter: board private structure to initialize
1385  *
1386  * This function frees the memory allocated to the q_vectors.  In addition if
1387  * NAPI is enabled it will delete any references to the NAPI struct prior
1388  * to freeing the q_vector.
1389  **/
1390 static void iavf_free_q_vectors(struct iavf_adapter *adapter)
1391 {
1392         int q_idx, num_q_vectors;
1393         int napi_vectors;
1394
1395         if (!adapter->q_vectors)
1396                 return;
1397
1398         num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1399         napi_vectors = adapter->num_active_queues;
1400
1401         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1402                 struct iavf_q_vector *q_vector = &adapter->q_vectors[q_idx];
1403
1404                 if (q_idx < napi_vectors)
1405                         netif_napi_del(&q_vector->napi);
1406         }
1407         kfree(adapter->q_vectors);
1408         adapter->q_vectors = NULL;
1409 }
1410
1411 /**
1412  * iavf_reset_interrupt_capability - Reset MSIX setup
1413  * @adapter: board private structure
1414  *
1415  **/
1416 void iavf_reset_interrupt_capability(struct iavf_adapter *adapter)
1417 {
1418         if (!adapter->msix_entries)
1419                 return;
1420
1421         pci_disable_msix(adapter->pdev);
1422         kfree(adapter->msix_entries);
1423         adapter->msix_entries = NULL;
1424 }
1425
1426 /**
1427  * iavf_init_interrupt_scheme - Determine if MSIX is supported and init
1428  * @adapter: board private structure to initialize
1429  *
1430  **/
1431 int iavf_init_interrupt_scheme(struct iavf_adapter *adapter)
1432 {
1433         int err;
1434
1435         err = iavf_alloc_queues(adapter);
1436         if (err) {
1437                 dev_err(&adapter->pdev->dev,
1438                         "Unable to allocate memory for queues\n");
1439                 goto err_alloc_queues;
1440         }
1441
1442         rtnl_lock();
1443         err = iavf_set_interrupt_capability(adapter);
1444         rtnl_unlock();
1445         if (err) {
1446                 dev_err(&adapter->pdev->dev,
1447                         "Unable to setup interrupt capabilities\n");
1448                 goto err_set_interrupt;
1449         }
1450
1451         err = iavf_alloc_q_vectors(adapter);
1452         if (err) {
1453                 dev_err(&adapter->pdev->dev,
1454                         "Unable to allocate memory for queue vectors\n");
1455                 goto err_alloc_q_vectors;
1456         }
1457
1458         /* If we've made it so far while ADq flag being ON, then we haven't
1459          * bailed out anywhere in middle. And ADq isn't just enabled but actual
1460          * resources have been allocated in the reset path.
1461          * Now we can truly claim that ADq is enabled.
1462          */
1463         if ((adapter->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_ADQ) &&
1464             adapter->num_tc)
1465                 dev_info(&adapter->pdev->dev, "ADq Enabled, %u TCs created",
1466                          adapter->num_tc);
1467
1468         dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
1469                  (adapter->num_active_queues > 1) ? "Enabled" : "Disabled",
1470                  adapter->num_active_queues);
1471
1472         return 0;
1473 err_alloc_q_vectors:
1474         iavf_reset_interrupt_capability(adapter);
1475 err_set_interrupt:
1476         iavf_free_queues(adapter);
1477 err_alloc_queues:
1478         return err;
1479 }
1480
1481 /**
1482  * iavf_free_rss - Free memory used by RSS structs
1483  * @adapter: board private structure
1484  **/
1485 static void iavf_free_rss(struct iavf_adapter *adapter)
1486 {
1487         kfree(adapter->rss_key);
1488         adapter->rss_key = NULL;
1489
1490         kfree(adapter->rss_lut);
1491         adapter->rss_lut = NULL;
1492 }
1493
1494 /**
1495  * iavf_reinit_interrupt_scheme - Reallocate queues and vectors
1496  * @adapter: board private structure
1497  *
1498  * Returns 0 on success, negative on failure
1499  **/
1500 static int iavf_reinit_interrupt_scheme(struct iavf_adapter *adapter)
1501 {
1502         struct net_device *netdev = adapter->netdev;
1503         int err;
1504
1505         if (netif_running(netdev))
1506                 iavf_free_traffic_irqs(adapter);
1507         iavf_free_misc_irq(adapter);
1508         iavf_reset_interrupt_capability(adapter);
1509         iavf_free_q_vectors(adapter);
1510         iavf_free_queues(adapter);
1511
1512         err =  iavf_init_interrupt_scheme(adapter);
1513         if (err)
1514                 goto err;
1515
1516         netif_tx_stop_all_queues(netdev);
1517
1518         err = iavf_request_misc_irq(adapter);
1519         if (err)
1520                 goto err;
1521
1522         set_bit(__IAVF_VSI_DOWN, adapter->vsi.state);
1523
1524         iavf_map_rings_to_vectors(adapter);
1525
1526         if (RSS_AQ(adapter))
1527                 adapter->aq_required |= IAVF_FLAG_AQ_CONFIGURE_RSS;
1528         else
1529                 err = iavf_init_rss(adapter);
1530 err:
1531         return err;
1532 }
1533
1534 /**
1535  * iavf_watchdog_timer - Periodic call-back timer
1536  * @data: pointer to adapter disguised as unsigned long
1537  **/
1538 static void iavf_watchdog_timer(struct timer_list *t)
1539 {
1540         struct iavf_adapter *adapter = from_timer(adapter, t,
1541                                                     watchdog_timer);
1542
1543         schedule_work(&adapter->watchdog_task);
1544         /* timer will be rescheduled in watchdog task */
1545 }
1546
1547 /**
1548  * iavf_watchdog_task - Periodic call-back task
1549  * @work: pointer to work_struct
1550  **/
1551 static void iavf_watchdog_task(struct work_struct *work)
1552 {
1553         struct iavf_adapter *adapter = container_of(work,
1554                                                       struct iavf_adapter,
1555                                                       watchdog_task);
1556         struct iavf_hw *hw = &adapter->hw;
1557         u32 reg_val;
1558
1559         if (test_and_set_bit(__IAVF_IN_CRITICAL_TASK, &adapter->crit_section))
1560                 goto restart_watchdog;
1561
1562         if (adapter->flags & IAVF_FLAG_PF_COMMS_FAILED) {
1563                 reg_val = rd32(hw, IAVF_VFGEN_RSTAT) &
1564                           IAVF_VFGEN_RSTAT_VFR_STATE_MASK;
1565                 if ((reg_val == VIRTCHNL_VFR_VFACTIVE) ||
1566                     (reg_val == VIRTCHNL_VFR_COMPLETED)) {
1567                         /* A chance for redemption! */
1568                         dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
1569                         adapter->state = __IAVF_STARTUP;
1570                         adapter->flags &= ~IAVF_FLAG_PF_COMMS_FAILED;
1571                         schedule_delayed_work(&adapter->init_task, 10);
1572                         clear_bit(__IAVF_IN_CRITICAL_TASK,
1573                                   &adapter->crit_section);
1574                         /* Don't reschedule the watchdog, since we've restarted
1575                          * the init task. When init_task contacts the PF and
1576                          * gets everything set up again, it'll restart the
1577                          * watchdog for us. Down, boy. Sit. Stay. Woof.
1578                          */
1579                         return;
1580                 }
1581                 adapter->aq_required = 0;
1582                 adapter->current_op = VIRTCHNL_OP_UNKNOWN;
1583                 goto watchdog_done;
1584         }
1585
1586         if ((adapter->state < __IAVF_DOWN) ||
1587             (adapter->flags & IAVF_FLAG_RESET_PENDING))
1588                 goto watchdog_done;
1589
1590         /* check for reset */
1591         reg_val = rd32(hw, IAVF_VF_ARQLEN1) & IAVF_VF_ARQLEN1_ARQENABLE_MASK;
1592         if (!(adapter->flags & IAVF_FLAG_RESET_PENDING) && !reg_val) {
1593                 adapter->state = __IAVF_RESETTING;
1594                 adapter->flags |= IAVF_FLAG_RESET_PENDING;
1595                 dev_err(&adapter->pdev->dev, "Hardware reset detected\n");
1596                 schedule_work(&adapter->reset_task);
1597                 adapter->aq_required = 0;
1598                 adapter->current_op = VIRTCHNL_OP_UNKNOWN;
1599                 goto watchdog_done;
1600         }
1601
1602         /* Process admin queue tasks. After init, everything gets done
1603          * here so we don't race on the admin queue.
1604          */
1605         if (adapter->current_op) {
1606                 if (!iavf_asq_done(hw)) {
1607                         dev_dbg(&adapter->pdev->dev, "Admin queue timeout\n");
1608                         iavf_send_api_ver(adapter);
1609                 }
1610                 goto watchdog_done;
1611         }
1612         if (adapter->aq_required & IAVF_FLAG_AQ_GET_CONFIG) {
1613                 iavf_send_vf_config_msg(adapter);
1614                 goto watchdog_done;
1615         }
1616
1617         if (adapter->aq_required & IAVF_FLAG_AQ_DISABLE_QUEUES) {
1618                 iavf_disable_queues(adapter);
1619                 goto watchdog_done;
1620         }
1621
1622         if (adapter->aq_required & IAVF_FLAG_AQ_MAP_VECTORS) {
1623                 iavf_map_queues(adapter);
1624                 goto watchdog_done;
1625         }
1626
1627         if (adapter->aq_required & IAVF_FLAG_AQ_ADD_MAC_FILTER) {
1628                 iavf_add_ether_addrs(adapter);
1629                 goto watchdog_done;
1630         }
1631
1632         if (adapter->aq_required & IAVF_FLAG_AQ_ADD_VLAN_FILTER) {
1633                 iavf_add_vlans(adapter);
1634                 goto watchdog_done;
1635         }
1636
1637         if (adapter->aq_required & IAVF_FLAG_AQ_DEL_MAC_FILTER) {
1638                 iavf_del_ether_addrs(adapter);
1639                 goto watchdog_done;
1640         }
1641
1642         if (adapter->aq_required & IAVF_FLAG_AQ_DEL_VLAN_FILTER) {
1643                 iavf_del_vlans(adapter);
1644                 goto watchdog_done;
1645         }
1646
1647         if (adapter->aq_required & IAVF_FLAG_AQ_ENABLE_VLAN_STRIPPING) {
1648                 iavf_enable_vlan_stripping(adapter);
1649                 goto watchdog_done;
1650         }
1651
1652         if (adapter->aq_required & IAVF_FLAG_AQ_DISABLE_VLAN_STRIPPING) {
1653                 iavf_disable_vlan_stripping(adapter);
1654                 goto watchdog_done;
1655         }
1656
1657         if (adapter->aq_required & IAVF_FLAG_AQ_CONFIGURE_QUEUES) {
1658                 iavf_configure_queues(adapter);
1659                 goto watchdog_done;
1660         }
1661
1662         if (adapter->aq_required & IAVF_FLAG_AQ_ENABLE_QUEUES) {
1663                 iavf_enable_queues(adapter);
1664                 goto watchdog_done;
1665         }
1666
1667         if (adapter->aq_required & IAVF_FLAG_AQ_CONFIGURE_RSS) {
1668                 /* This message goes straight to the firmware, not the
1669                  * PF, so we don't have to set current_op as we will
1670                  * not get a response through the ARQ.
1671                  */
1672                 iavf_init_rss(adapter);
1673                 adapter->aq_required &= ~IAVF_FLAG_AQ_CONFIGURE_RSS;
1674                 goto watchdog_done;
1675         }
1676         if (adapter->aq_required & IAVF_FLAG_AQ_GET_HENA) {
1677                 iavf_get_hena(adapter);
1678                 goto watchdog_done;
1679         }
1680         if (adapter->aq_required & IAVF_FLAG_AQ_SET_HENA) {
1681                 iavf_set_hena(adapter);
1682                 goto watchdog_done;
1683         }
1684         if (adapter->aq_required & IAVF_FLAG_AQ_SET_RSS_KEY) {
1685                 iavf_set_rss_key(adapter);
1686                 goto watchdog_done;
1687         }
1688         if (adapter->aq_required & IAVF_FLAG_AQ_SET_RSS_LUT) {
1689                 iavf_set_rss_lut(adapter);
1690                 goto watchdog_done;
1691         }
1692
1693         if (adapter->aq_required & IAVF_FLAG_AQ_REQUEST_PROMISC) {
1694                 iavf_set_promiscuous(adapter, FLAG_VF_UNICAST_PROMISC |
1695                                        FLAG_VF_MULTICAST_PROMISC);
1696                 goto watchdog_done;
1697         }
1698
1699         if (adapter->aq_required & IAVF_FLAG_AQ_REQUEST_ALLMULTI) {
1700                 iavf_set_promiscuous(adapter, FLAG_VF_MULTICAST_PROMISC);
1701                 goto watchdog_done;
1702         }
1703
1704         if ((adapter->aq_required & IAVF_FLAG_AQ_RELEASE_PROMISC) &&
1705             (adapter->aq_required & IAVF_FLAG_AQ_RELEASE_ALLMULTI)) {
1706                 iavf_set_promiscuous(adapter, 0);
1707                 goto watchdog_done;
1708         }
1709
1710         if (adapter->aq_required & IAVF_FLAG_AQ_ENABLE_CHANNELS) {
1711                 iavf_enable_channels(adapter);
1712                 goto watchdog_done;
1713         }
1714
1715         if (adapter->aq_required & IAVF_FLAG_AQ_DISABLE_CHANNELS) {
1716                 iavf_disable_channels(adapter);
1717                 goto watchdog_done;
1718         }
1719
1720         if (adapter->aq_required & IAVF_FLAG_AQ_ADD_CLOUD_FILTER) {
1721                 iavf_add_cloud_filter(adapter);
1722                 goto watchdog_done;
1723         }
1724
1725         if (adapter->aq_required & IAVF_FLAG_AQ_DEL_CLOUD_FILTER) {
1726                 iavf_del_cloud_filter(adapter);
1727                 goto watchdog_done;
1728         }
1729
1730         schedule_delayed_work(&adapter->client_task, msecs_to_jiffies(5));
1731
1732         if (adapter->state == __IAVF_RUNNING)
1733                 iavf_request_stats(adapter);
1734 watchdog_done:
1735         if (adapter->state == __IAVF_RUNNING)
1736                 iavf_detect_recover_hung(&adapter->vsi);
1737         clear_bit(__IAVF_IN_CRITICAL_TASK, &adapter->crit_section);
1738 restart_watchdog:
1739         if (adapter->state == __IAVF_REMOVE)
1740                 return;
1741         if (adapter->aq_required)
1742                 mod_timer(&adapter->watchdog_timer,
1743                           jiffies + msecs_to_jiffies(20));
1744         else
1745                 mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
1746         schedule_work(&adapter->adminq_task);
1747 }
1748
1749 static void iavf_disable_vf(struct iavf_adapter *adapter)
1750 {
1751         struct iavf_mac_filter *f, *ftmp;
1752         struct iavf_vlan_filter *fv, *fvtmp;
1753         struct iavf_cloud_filter *cf, *cftmp;
1754
1755         adapter->flags |= IAVF_FLAG_PF_COMMS_FAILED;
1756
1757         /* We don't use netif_running() because it may be true prior to
1758          * ndo_open() returning, so we can't assume it means all our open
1759          * tasks have finished, since we're not holding the rtnl_lock here.
1760          */
1761         if (adapter->state == __IAVF_RUNNING) {
1762                 set_bit(__IAVF_VSI_DOWN, adapter->vsi.state);
1763                 netif_carrier_off(adapter->netdev);
1764                 netif_tx_disable(adapter->netdev);
1765                 adapter->link_up = false;
1766                 iavf_napi_disable_all(adapter);
1767                 iavf_irq_disable(adapter);
1768                 iavf_free_traffic_irqs(adapter);
1769                 iavf_free_all_tx_resources(adapter);
1770                 iavf_free_all_rx_resources(adapter);
1771         }
1772
1773         spin_lock_bh(&adapter->mac_vlan_list_lock);
1774
1775         /* Delete all of the filters */
1776         list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
1777                 list_del(&f->list);
1778                 kfree(f);
1779         }
1780
1781         list_for_each_entry_safe(fv, fvtmp, &adapter->vlan_filter_list, list) {
1782                 list_del(&fv->list);
1783                 kfree(fv);
1784         }
1785
1786         spin_unlock_bh(&adapter->mac_vlan_list_lock);
1787
1788         spin_lock_bh(&adapter->cloud_filter_list_lock);
1789         list_for_each_entry_safe(cf, cftmp, &adapter->cloud_filter_list, list) {
1790                 list_del(&cf->list);
1791                 kfree(cf);
1792                 adapter->num_cloud_filters--;
1793         }
1794         spin_unlock_bh(&adapter->cloud_filter_list_lock);
1795
1796         iavf_free_misc_irq(adapter);
1797         iavf_reset_interrupt_capability(adapter);
1798         iavf_free_queues(adapter);
1799         iavf_free_q_vectors(adapter);
1800         kfree(adapter->vf_res);
1801         iavf_shutdown_adminq(&adapter->hw);
1802         adapter->netdev->flags &= ~IFF_UP;
1803         clear_bit(__IAVF_IN_CRITICAL_TASK, &adapter->crit_section);
1804         adapter->flags &= ~IAVF_FLAG_RESET_PENDING;
1805         adapter->state = __IAVF_DOWN;
1806         wake_up(&adapter->down_waitqueue);
1807         dev_info(&adapter->pdev->dev, "Reset task did not complete, VF disabled\n");
1808 }
1809
1810 #define IAVF_RESET_WAIT_MS 10
1811 #define IAVF_RESET_WAIT_COUNT 500
1812 /**
1813  * iavf_reset_task - Call-back task to handle hardware reset
1814  * @work: pointer to work_struct
1815  *
1816  * During reset we need to shut down and reinitialize the admin queue
1817  * before we can use it to communicate with the PF again. We also clear
1818  * and reinit the rings because that context is lost as well.
1819  **/
1820 static void iavf_reset_task(struct work_struct *work)
1821 {
1822         struct iavf_adapter *adapter = container_of(work,
1823                                                       struct iavf_adapter,
1824                                                       reset_task);
1825         struct virtchnl_vf_resource *vfres = adapter->vf_res;
1826         struct net_device *netdev = adapter->netdev;
1827         struct iavf_hw *hw = &adapter->hw;
1828         struct iavf_vlan_filter *vlf;
1829         struct iavf_cloud_filter *cf;
1830         struct iavf_mac_filter *f;
1831         u32 reg_val;
1832         int i = 0, err;
1833         bool running;
1834
1835         /* When device is being removed it doesn't make sense to run the reset
1836          * task, just return in such a case.
1837          */
1838         if (test_bit(__IAVF_IN_REMOVE_TASK, &adapter->crit_section))
1839                 return;
1840
1841         while (test_and_set_bit(__IAVF_IN_CLIENT_TASK,
1842                                 &adapter->crit_section))
1843                 usleep_range(500, 1000);
1844         if (CLIENT_ENABLED(adapter)) {
1845                 adapter->flags &= ~(IAVF_FLAG_CLIENT_NEEDS_OPEN |
1846                                     IAVF_FLAG_CLIENT_NEEDS_CLOSE |
1847                                     IAVF_FLAG_CLIENT_NEEDS_L2_PARAMS |
1848                                     IAVF_FLAG_SERVICE_CLIENT_REQUESTED);
1849                 cancel_delayed_work_sync(&adapter->client_task);
1850                 iavf_notify_client_close(&adapter->vsi, true);
1851         }
1852         iavf_misc_irq_disable(adapter);
1853         if (adapter->flags & IAVF_FLAG_RESET_NEEDED) {
1854                 adapter->flags &= ~IAVF_FLAG_RESET_NEEDED;
1855                 /* Restart the AQ here. If we have been reset but didn't
1856                  * detect it, or if the PF had to reinit, our AQ will be hosed.
1857                  */
1858                 iavf_shutdown_adminq(hw);
1859                 iavf_init_adminq(hw);
1860                 iavf_request_reset(adapter);
1861         }
1862         adapter->flags |= IAVF_FLAG_RESET_PENDING;
1863
1864         /* poll until we see the reset actually happen */
1865         for (i = 0; i < IAVF_RESET_WAIT_COUNT; i++) {
1866                 reg_val = rd32(hw, IAVF_VF_ARQLEN1) &
1867                           IAVF_VF_ARQLEN1_ARQENABLE_MASK;
1868                 if (!reg_val)
1869                         break;
1870                 usleep_range(5000, 10000);
1871         }
1872         if (i == IAVF_RESET_WAIT_COUNT) {
1873                 dev_info(&adapter->pdev->dev, "Never saw reset\n");
1874                 goto continue_reset; /* act like the reset happened */
1875         }
1876
1877         /* wait until the reset is complete and the PF is responding to us */
1878         for (i = 0; i < IAVF_RESET_WAIT_COUNT; i++) {
1879                 /* sleep first to make sure a minimum wait time is met */
1880                 msleep(IAVF_RESET_WAIT_MS);
1881
1882                 reg_val = rd32(hw, IAVF_VFGEN_RSTAT) &
1883                           IAVF_VFGEN_RSTAT_VFR_STATE_MASK;
1884                 if (reg_val == VIRTCHNL_VFR_VFACTIVE)
1885                         break;
1886         }
1887
1888         pci_set_master(adapter->pdev);
1889
1890         if (i == IAVF_RESET_WAIT_COUNT) {
1891                 dev_err(&adapter->pdev->dev, "Reset never finished (%x)\n",
1892                         reg_val);
1893                 iavf_disable_vf(adapter);
1894                 clear_bit(__IAVF_IN_CLIENT_TASK, &adapter->crit_section);
1895                 return; /* Do not attempt to reinit. It's dead, Jim. */
1896         }
1897
1898 continue_reset:
1899         /* We don't use netif_running() because it may be true prior to
1900          * ndo_open() returning, so we can't assume it means all our open
1901          * tasks have finished, since we're not holding the rtnl_lock here.
1902          */
1903         running = ((adapter->state == __IAVF_RUNNING) ||
1904                    (adapter->state == __IAVF_RESETTING));
1905
1906         if (running) {
1907                 netif_carrier_off(netdev);
1908                 netif_tx_stop_all_queues(netdev);
1909                 adapter->link_up = false;
1910                 iavf_napi_disable_all(adapter);
1911         }
1912         iavf_irq_disable(adapter);
1913
1914         adapter->state = __IAVF_RESETTING;
1915         adapter->flags &= ~IAVF_FLAG_RESET_PENDING;
1916
1917         /* free the Tx/Rx rings and descriptors, might be better to just
1918          * re-use them sometime in the future
1919          */
1920         iavf_free_all_rx_resources(adapter);
1921         iavf_free_all_tx_resources(adapter);
1922
1923         adapter->flags |= IAVF_FLAG_QUEUES_DISABLED;
1924         /* kill and reinit the admin queue */
1925         iavf_shutdown_adminq(hw);
1926         adapter->current_op = VIRTCHNL_OP_UNKNOWN;
1927         err = iavf_init_adminq(hw);
1928         if (err)
1929                 dev_info(&adapter->pdev->dev, "Failed to init adminq: %d\n",
1930                          err);
1931         adapter->aq_required = 0;
1932
1933         if (adapter->flags & IAVF_FLAG_REINIT_ITR_NEEDED) {
1934                 err = iavf_reinit_interrupt_scheme(adapter);
1935                 if (err)
1936                         goto reset_err;
1937         }
1938
1939         adapter->aq_required |= IAVF_FLAG_AQ_GET_CONFIG;
1940         adapter->aq_required |= IAVF_FLAG_AQ_MAP_VECTORS;
1941
1942         spin_lock_bh(&adapter->mac_vlan_list_lock);
1943
1944         /* re-add all MAC filters */
1945         list_for_each_entry(f, &adapter->mac_filter_list, list) {
1946                 f->add = true;
1947         }
1948         /* re-add all VLAN filters */
1949         list_for_each_entry(vlf, &adapter->vlan_filter_list, list) {
1950                 vlf->add = true;
1951         }
1952
1953         spin_unlock_bh(&adapter->mac_vlan_list_lock);
1954
1955         /* check if TCs are running and re-add all cloud filters */
1956         spin_lock_bh(&adapter->cloud_filter_list_lock);
1957         if ((vfres->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_ADQ) &&
1958             adapter->num_tc) {
1959                 list_for_each_entry(cf, &adapter->cloud_filter_list, list) {
1960                         cf->add = true;
1961                 }
1962         }
1963         spin_unlock_bh(&adapter->cloud_filter_list_lock);
1964
1965         adapter->aq_required |= IAVF_FLAG_AQ_ADD_MAC_FILTER;
1966         adapter->aq_required |= IAVF_FLAG_AQ_ADD_VLAN_FILTER;
1967         adapter->aq_required |= IAVF_FLAG_AQ_ADD_CLOUD_FILTER;
1968         iavf_misc_irq_enable(adapter);
1969
1970         mod_timer(&adapter->watchdog_timer, jiffies + 2);
1971
1972         /* We were running when the reset started, so we need to restore some
1973          * state here.
1974          */
1975         if (running) {
1976                 /* allocate transmit descriptors */
1977                 err = iavf_setup_all_tx_resources(adapter);
1978                 if (err)
1979                         goto reset_err;
1980
1981                 /* allocate receive descriptors */
1982                 err = iavf_setup_all_rx_resources(adapter);
1983                 if (err)
1984                         goto reset_err;
1985
1986                 if (adapter->flags & IAVF_FLAG_REINIT_ITR_NEEDED) {
1987                         err = iavf_request_traffic_irqs(adapter, netdev->name);
1988                         if (err)
1989                                 goto reset_err;
1990
1991                         adapter->flags &= ~IAVF_FLAG_REINIT_ITR_NEEDED;
1992                 }
1993
1994                 iavf_configure(adapter);
1995
1996                 iavf_up_complete(adapter);
1997
1998                 iavf_irq_enable(adapter, true);
1999         } else {
2000                 adapter->state = __IAVF_DOWN;
2001                 wake_up(&adapter->down_waitqueue);
2002         }
2003         clear_bit(__IAVF_IN_CLIENT_TASK, &adapter->crit_section);
2004         clear_bit(__IAVF_IN_CRITICAL_TASK, &adapter->crit_section);
2005
2006         return;
2007 reset_err:
2008         clear_bit(__IAVF_IN_CLIENT_TASK, &adapter->crit_section);
2009         clear_bit(__IAVF_IN_CRITICAL_TASK, &adapter->crit_section);
2010         dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
2011         iavf_close(netdev);
2012 }
2013
2014 /**
2015  * iavf_adminq_task - worker thread to clean the admin queue
2016  * @work: pointer to work_struct containing our data
2017  **/
2018 static void iavf_adminq_task(struct work_struct *work)
2019 {
2020         struct iavf_adapter *adapter =
2021                 container_of(work, struct iavf_adapter, adminq_task);
2022         struct iavf_hw *hw = &adapter->hw;
2023         struct i40e_arq_event_info event;
2024         enum virtchnl_ops v_op;
2025         iavf_status ret, v_ret;
2026         u32 val, oldval;
2027         u16 pending;
2028
2029         if (adapter->flags & IAVF_FLAG_PF_COMMS_FAILED)
2030                 goto out;
2031
2032         event.buf_len = IAVF_MAX_AQ_BUF_SIZE;
2033         event.msg_buf = kzalloc(event.buf_len, GFP_KERNEL);
2034         if (!event.msg_buf)
2035                 goto out;
2036
2037         do {
2038                 ret = iavf_clean_arq_element(hw, &event, &pending);
2039                 v_op = (enum virtchnl_ops)le32_to_cpu(event.desc.cookie_high);
2040                 v_ret = (iavf_status)le32_to_cpu(event.desc.cookie_low);
2041
2042                 if (ret || !v_op)
2043                         break; /* No event to process or error cleaning ARQ */
2044
2045                 iavf_virtchnl_completion(adapter, v_op, v_ret, event.msg_buf,
2046                                          event.msg_len);
2047                 if (pending != 0)
2048                         memset(event.msg_buf, 0, IAVF_MAX_AQ_BUF_SIZE);
2049         } while (pending);
2050
2051         if ((adapter->flags &
2052              (IAVF_FLAG_RESET_PENDING | IAVF_FLAG_RESET_NEEDED)) ||
2053             adapter->state == __IAVF_RESETTING)
2054                 goto freedom;
2055
2056         /* check for error indications */
2057         val = rd32(hw, hw->aq.arq.len);
2058         if (val == 0xdeadbeef) /* indicates device in reset */
2059                 goto freedom;
2060         oldval = val;
2061         if (val & IAVF_VF_ARQLEN1_ARQVFE_MASK) {
2062                 dev_info(&adapter->pdev->dev, "ARQ VF Error detected\n");
2063                 val &= ~IAVF_VF_ARQLEN1_ARQVFE_MASK;
2064         }
2065         if (val & IAVF_VF_ARQLEN1_ARQOVFL_MASK) {
2066                 dev_info(&adapter->pdev->dev, "ARQ Overflow Error detected\n");
2067                 val &= ~IAVF_VF_ARQLEN1_ARQOVFL_MASK;
2068         }
2069         if (val & IAVF_VF_ARQLEN1_ARQCRIT_MASK) {
2070                 dev_info(&adapter->pdev->dev, "ARQ Critical Error detected\n");
2071                 val &= ~IAVF_VF_ARQLEN1_ARQCRIT_MASK;
2072         }
2073         if (oldval != val)
2074                 wr32(hw, hw->aq.arq.len, val);
2075
2076         val = rd32(hw, hw->aq.asq.len);
2077         oldval = val;
2078         if (val & IAVF_VF_ATQLEN1_ATQVFE_MASK) {
2079                 dev_info(&adapter->pdev->dev, "ASQ VF Error detected\n");
2080                 val &= ~IAVF_VF_ATQLEN1_ATQVFE_MASK;
2081         }
2082         if (val & IAVF_VF_ATQLEN1_ATQOVFL_MASK) {
2083                 dev_info(&adapter->pdev->dev, "ASQ Overflow Error detected\n");
2084                 val &= ~IAVF_VF_ATQLEN1_ATQOVFL_MASK;
2085         }
2086         if (val & IAVF_VF_ATQLEN1_ATQCRIT_MASK) {
2087                 dev_info(&adapter->pdev->dev, "ASQ Critical Error detected\n");
2088                 val &= ~IAVF_VF_ATQLEN1_ATQCRIT_MASK;
2089         }
2090         if (oldval != val)
2091                 wr32(hw, hw->aq.asq.len, val);
2092
2093 freedom:
2094         kfree(event.msg_buf);
2095 out:
2096         /* re-enable Admin queue interrupt cause */
2097         iavf_misc_irq_enable(adapter);
2098 }
2099
2100 /**
2101  * iavf_client_task - worker thread to perform client work
2102  * @work: pointer to work_struct containing our data
2103  *
2104  * This task handles client interactions. Because client calls can be
2105  * reentrant, we can't handle them in the watchdog.
2106  **/
2107 static void iavf_client_task(struct work_struct *work)
2108 {
2109         struct iavf_adapter *adapter =
2110                 container_of(work, struct iavf_adapter, client_task.work);
2111
2112         /* If we can't get the client bit, just give up. We'll be rescheduled
2113          * later.
2114          */
2115
2116         if (test_and_set_bit(__IAVF_IN_CLIENT_TASK, &adapter->crit_section))
2117                 return;
2118
2119         if (adapter->flags & IAVF_FLAG_SERVICE_CLIENT_REQUESTED) {
2120                 iavf_client_subtask(adapter);
2121                 adapter->flags &= ~IAVF_FLAG_SERVICE_CLIENT_REQUESTED;
2122                 goto out;
2123         }
2124         if (adapter->flags & IAVF_FLAG_CLIENT_NEEDS_L2_PARAMS) {
2125                 iavf_notify_client_l2_params(&adapter->vsi);
2126                 adapter->flags &= ~IAVF_FLAG_CLIENT_NEEDS_L2_PARAMS;
2127                 goto out;
2128         }
2129         if (adapter->flags & IAVF_FLAG_CLIENT_NEEDS_CLOSE) {
2130                 iavf_notify_client_close(&adapter->vsi, false);
2131                 adapter->flags &= ~IAVF_FLAG_CLIENT_NEEDS_CLOSE;
2132                 goto out;
2133         }
2134         if (adapter->flags & IAVF_FLAG_CLIENT_NEEDS_OPEN) {
2135                 iavf_notify_client_open(&adapter->vsi);
2136                 adapter->flags &= ~IAVF_FLAG_CLIENT_NEEDS_OPEN;
2137         }
2138 out:
2139         clear_bit(__IAVF_IN_CLIENT_TASK, &adapter->crit_section);
2140 }
2141
2142 /**
2143  * iavf_free_all_tx_resources - Free Tx Resources for All Queues
2144  * @adapter: board private structure
2145  *
2146  * Free all transmit software resources
2147  **/
2148 void iavf_free_all_tx_resources(struct iavf_adapter *adapter)
2149 {
2150         int i;
2151
2152         if (!adapter->tx_rings)
2153                 return;
2154
2155         for (i = 0; i < adapter->num_active_queues; i++)
2156                 if (adapter->tx_rings[i].desc)
2157                         iavf_free_tx_resources(&adapter->tx_rings[i]);
2158 }
2159
2160 /**
2161  * iavf_setup_all_tx_resources - allocate all queues Tx resources
2162  * @adapter: board private structure
2163  *
2164  * If this function returns with an error, then it's possible one or
2165  * more of the rings is populated (while the rest are not).  It is the
2166  * callers duty to clean those orphaned rings.
2167  *
2168  * Return 0 on success, negative on failure
2169  **/
2170 static int iavf_setup_all_tx_resources(struct iavf_adapter *adapter)
2171 {
2172         int i, err = 0;
2173
2174         for (i = 0; i < adapter->num_active_queues; i++) {
2175                 adapter->tx_rings[i].count = adapter->tx_desc_count;
2176                 err = iavf_setup_tx_descriptors(&adapter->tx_rings[i]);
2177                 if (!err)
2178                         continue;
2179                 dev_err(&adapter->pdev->dev,
2180                         "Allocation for Tx Queue %u failed\n", i);
2181                 break;
2182         }
2183
2184         return err;
2185 }
2186
2187 /**
2188  * iavf_setup_all_rx_resources - allocate all queues Rx resources
2189  * @adapter: board private structure
2190  *
2191  * If this function returns with an error, then it's possible one or
2192  * more of the rings is populated (while the rest are not).  It is the
2193  * callers duty to clean those orphaned rings.
2194  *
2195  * Return 0 on success, negative on failure
2196  **/
2197 static int iavf_setup_all_rx_resources(struct iavf_adapter *adapter)
2198 {
2199         int i, err = 0;
2200
2201         for (i = 0; i < adapter->num_active_queues; i++) {
2202                 adapter->rx_rings[i].count = adapter->rx_desc_count;
2203                 err = iavf_setup_rx_descriptors(&adapter->rx_rings[i]);
2204                 if (!err)
2205                         continue;
2206                 dev_err(&adapter->pdev->dev,
2207                         "Allocation for Rx Queue %u failed\n", i);
2208                 break;
2209         }
2210         return err;
2211 }
2212
2213 /**
2214  * iavf_free_all_rx_resources - Free Rx Resources for All Queues
2215  * @adapter: board private structure
2216  *
2217  * Free all receive software resources
2218  **/
2219 void iavf_free_all_rx_resources(struct iavf_adapter *adapter)
2220 {
2221         int i;
2222
2223         if (!adapter->rx_rings)
2224                 return;
2225
2226         for (i = 0; i < adapter->num_active_queues; i++)
2227                 if (adapter->rx_rings[i].desc)
2228                         iavf_free_rx_resources(&adapter->rx_rings[i]);
2229 }
2230
2231 /**
2232  * iavf_validate_tx_bandwidth - validate the max Tx bandwidth
2233  * @adapter: board private structure
2234  * @max_tx_rate: max Tx bw for a tc
2235  **/
2236 static int iavf_validate_tx_bandwidth(struct iavf_adapter *adapter,
2237                                       u64 max_tx_rate)
2238 {
2239         int speed = 0, ret = 0;
2240
2241         switch (adapter->link_speed) {
2242         case I40E_LINK_SPEED_40GB:
2243                 speed = 40000;
2244                 break;
2245         case I40E_LINK_SPEED_25GB:
2246                 speed = 25000;
2247                 break;
2248         case I40E_LINK_SPEED_20GB:
2249                 speed = 20000;
2250                 break;
2251         case I40E_LINK_SPEED_10GB:
2252                 speed = 10000;
2253                 break;
2254         case I40E_LINK_SPEED_1GB:
2255                 speed = 1000;
2256                 break;
2257         case I40E_LINK_SPEED_100MB:
2258                 speed = 100;
2259                 break;
2260         default:
2261                 break;
2262         }
2263
2264         if (max_tx_rate > speed) {
2265                 dev_err(&adapter->pdev->dev,
2266                         "Invalid tx rate specified\n");
2267                 ret = -EINVAL;
2268         }
2269
2270         return ret;
2271 }
2272
2273 /**
2274  * iavf_validate_channel_config - validate queue mapping info
2275  * @adapter: board private structure
2276  * @mqprio_qopt: queue parameters
2277  *
2278  * This function validates if the config provided by the user to
2279  * configure queue channels is valid or not. Returns 0 on a valid
2280  * config.
2281  **/
2282 static int iavf_validate_ch_config(struct iavf_adapter *adapter,
2283                                    struct tc_mqprio_qopt_offload *mqprio_qopt)
2284 {
2285         u64 total_max_rate = 0;
2286         int i, num_qps = 0;
2287         u64 tx_rate = 0;
2288         int ret = 0;
2289
2290         if (mqprio_qopt->qopt.num_tc > IAVF_MAX_TRAFFIC_CLASS ||
2291             mqprio_qopt->qopt.num_tc < 1)
2292                 return -EINVAL;
2293
2294         for (i = 0; i <= mqprio_qopt->qopt.num_tc - 1; i++) {
2295                 if (!mqprio_qopt->qopt.count[i] ||
2296                     mqprio_qopt->qopt.offset[i] != num_qps)
2297                         return -EINVAL;
2298                 if (mqprio_qopt->min_rate[i]) {
2299                         dev_err(&adapter->pdev->dev,
2300                                 "Invalid min tx rate (greater than 0) specified\n");
2301                         return -EINVAL;
2302                 }
2303                 /*convert to Mbps */
2304                 tx_rate = div_u64(mqprio_qopt->max_rate[i],
2305                                   IAVF_MBPS_DIVISOR);
2306                 total_max_rate += tx_rate;
2307                 num_qps += mqprio_qopt->qopt.count[i];
2308         }
2309         if (num_qps > IAVF_MAX_REQ_QUEUES)
2310                 return -EINVAL;
2311
2312         ret = iavf_validate_tx_bandwidth(adapter, total_max_rate);
2313         return ret;
2314 }
2315
2316 /**
2317  * iavf_del_all_cloud_filters - delete all cloud filters
2318  * on the traffic classes
2319  **/
2320 static void iavf_del_all_cloud_filters(struct iavf_adapter *adapter)
2321 {
2322         struct iavf_cloud_filter *cf, *cftmp;
2323
2324         spin_lock_bh(&adapter->cloud_filter_list_lock);
2325         list_for_each_entry_safe(cf, cftmp, &adapter->cloud_filter_list,
2326                                  list) {
2327                 list_del(&cf->list);
2328                 kfree(cf);
2329                 adapter->num_cloud_filters--;
2330         }
2331         spin_unlock_bh(&adapter->cloud_filter_list_lock);
2332 }
2333
2334 /**
2335  * __iavf_setup_tc - configure multiple traffic classes
2336  * @netdev: network interface device structure
2337  * @type_date: tc offload data
2338  *
2339  * This function processes the config information provided by the
2340  * user to configure traffic classes/queue channels and packages the
2341  * information to request the PF to setup traffic classes.
2342  *
2343  * Returns 0 on success.
2344  **/
2345 static int __iavf_setup_tc(struct net_device *netdev, void *type_data)
2346 {
2347         struct tc_mqprio_qopt_offload *mqprio_qopt = type_data;
2348         struct iavf_adapter *adapter = netdev_priv(netdev);
2349         struct virtchnl_vf_resource *vfres = adapter->vf_res;
2350         u8 num_tc = 0, total_qps = 0;
2351         int ret = 0, netdev_tc = 0;
2352         u64 max_tx_rate;
2353         u16 mode;
2354         int i;
2355
2356         num_tc = mqprio_qopt->qopt.num_tc;
2357         mode = mqprio_qopt->mode;
2358
2359         /* delete queue_channel */
2360         if (!mqprio_qopt->qopt.hw) {
2361                 if (adapter->ch_config.state == __IAVF_TC_RUNNING) {
2362                         /* reset the tc configuration */
2363                         netdev_reset_tc(netdev);
2364                         adapter->num_tc = 0;
2365                         netif_tx_stop_all_queues(netdev);
2366                         netif_tx_disable(netdev);
2367                         iavf_del_all_cloud_filters(adapter);
2368                         adapter->aq_required = IAVF_FLAG_AQ_DISABLE_CHANNELS;
2369                         goto exit;
2370                 } else {
2371                         return -EINVAL;
2372                 }
2373         }
2374
2375         /* add queue channel */
2376         if (mode == TC_MQPRIO_MODE_CHANNEL) {
2377                 if (!(vfres->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_ADQ)) {
2378                         dev_err(&adapter->pdev->dev, "ADq not supported\n");
2379                         return -EOPNOTSUPP;
2380                 }
2381                 if (adapter->ch_config.state != __IAVF_TC_INVALID) {
2382                         dev_err(&adapter->pdev->dev, "TC configuration already exists\n");
2383                         return -EINVAL;
2384                 }
2385
2386                 ret = iavf_validate_ch_config(adapter, mqprio_qopt);
2387                 if (ret)
2388                         return ret;
2389                 /* Return if same TC config is requested */
2390                 if (adapter->num_tc == num_tc)
2391                         return 0;
2392                 adapter->num_tc = num_tc;
2393
2394                 for (i = 0; i < IAVF_MAX_TRAFFIC_CLASS; i++) {
2395                         if (i < num_tc) {
2396                                 adapter->ch_config.ch_info[i].count =
2397                                         mqprio_qopt->qopt.count[i];
2398                                 adapter->ch_config.ch_info[i].offset =
2399                                         mqprio_qopt->qopt.offset[i];
2400                                 total_qps += mqprio_qopt->qopt.count[i];
2401                                 max_tx_rate = mqprio_qopt->max_rate[i];
2402                                 /* convert to Mbps */
2403                                 max_tx_rate = div_u64(max_tx_rate,
2404                                                       IAVF_MBPS_DIVISOR);
2405                                 adapter->ch_config.ch_info[i].max_tx_rate =
2406                                         max_tx_rate;
2407                         } else {
2408                                 adapter->ch_config.ch_info[i].count = 1;
2409                                 adapter->ch_config.ch_info[i].offset = 0;
2410                         }
2411                 }
2412                 adapter->ch_config.total_qps = total_qps;
2413                 netif_tx_stop_all_queues(netdev);
2414                 netif_tx_disable(netdev);
2415                 adapter->aq_required |= IAVF_FLAG_AQ_ENABLE_CHANNELS;
2416                 netdev_reset_tc(netdev);
2417                 /* Report the tc mapping up the stack */
2418                 netdev_set_num_tc(adapter->netdev, num_tc);
2419                 for (i = 0; i < IAVF_MAX_TRAFFIC_CLASS; i++) {
2420                         u16 qcount = mqprio_qopt->qopt.count[i];
2421                         u16 qoffset = mqprio_qopt->qopt.offset[i];
2422
2423                         if (i < num_tc)
2424                                 netdev_set_tc_queue(netdev, netdev_tc++, qcount,
2425                                                     qoffset);
2426                 }
2427         }
2428 exit:
2429         return ret;
2430 }
2431
2432 /**
2433  * iavf_parse_cls_flower - Parse tc flower filters provided by kernel
2434  * @adapter: board private structure
2435  * @cls_flower: pointer to struct tc_cls_flower_offload
2436  * @filter: pointer to cloud filter structure
2437  */
2438 static int iavf_parse_cls_flower(struct iavf_adapter *adapter,
2439                                  struct tc_cls_flower_offload *f,
2440                                  struct iavf_cloud_filter *filter)
2441 {
2442         u16 n_proto_mask = 0;
2443         u16 n_proto_key = 0;
2444         u8 field_flags = 0;
2445         u16 addr_type = 0;
2446         u16 n_proto = 0;
2447         int i = 0;
2448         struct virtchnl_filter *vf = &filter->f;
2449
2450         if (f->dissector->used_keys &
2451             ~(BIT(FLOW_DISSECTOR_KEY_CONTROL) |
2452               BIT(FLOW_DISSECTOR_KEY_BASIC) |
2453               BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS) |
2454               BIT(FLOW_DISSECTOR_KEY_VLAN) |
2455               BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS) |
2456               BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS) |
2457               BIT(FLOW_DISSECTOR_KEY_PORTS) |
2458               BIT(FLOW_DISSECTOR_KEY_ENC_KEYID))) {
2459                 dev_err(&adapter->pdev->dev, "Unsupported key used: 0x%x\n",
2460                         f->dissector->used_keys);
2461                 return -EOPNOTSUPP;
2462         }
2463
2464         if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ENC_KEYID)) {
2465                 struct flow_dissector_key_keyid *mask =
2466                         skb_flow_dissector_target(f->dissector,
2467                                                   FLOW_DISSECTOR_KEY_ENC_KEYID,
2468                                                   f->mask);
2469
2470                 if (mask->keyid != 0)
2471                         field_flags |= IAVF_CLOUD_FIELD_TEN_ID;
2472         }
2473
2474         if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_BASIC)) {
2475                 struct flow_dissector_key_basic *key =
2476                         skb_flow_dissector_target(f->dissector,
2477                                                   FLOW_DISSECTOR_KEY_BASIC,
2478                                                   f->key);
2479
2480                 struct flow_dissector_key_basic *mask =
2481                         skb_flow_dissector_target(f->dissector,
2482                                                   FLOW_DISSECTOR_KEY_BASIC,
2483                                                   f->mask);
2484                 n_proto_key = ntohs(key->n_proto);
2485                 n_proto_mask = ntohs(mask->n_proto);
2486
2487                 if (n_proto_key == ETH_P_ALL) {
2488                         n_proto_key = 0;
2489                         n_proto_mask = 0;
2490                 }
2491                 n_proto = n_proto_key & n_proto_mask;
2492                 if (n_proto != ETH_P_IP && n_proto != ETH_P_IPV6)
2493                         return -EINVAL;
2494                 if (n_proto == ETH_P_IPV6) {
2495                         /* specify flow type as TCP IPv6 */
2496                         vf->flow_type = VIRTCHNL_TCP_V6_FLOW;
2497                 }
2498
2499                 if (key->ip_proto != IPPROTO_TCP) {
2500                         dev_info(&adapter->pdev->dev, "Only TCP transport is supported\n");
2501                         return -EINVAL;
2502                 }
2503         }
2504
2505         if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ETH_ADDRS)) {
2506                 struct flow_dissector_key_eth_addrs *key =
2507                         skb_flow_dissector_target(f->dissector,
2508                                                   FLOW_DISSECTOR_KEY_ETH_ADDRS,
2509                                                   f->key);
2510
2511                 struct flow_dissector_key_eth_addrs *mask =
2512                         skb_flow_dissector_target(f->dissector,
2513                                                   FLOW_DISSECTOR_KEY_ETH_ADDRS,
2514                                                   f->mask);
2515                 /* use is_broadcast and is_zero to check for all 0xf or 0 */
2516                 if (!is_zero_ether_addr(mask->dst)) {
2517                         if (is_broadcast_ether_addr(mask->dst)) {
2518                                 field_flags |= IAVF_CLOUD_FIELD_OMAC;
2519                         } else {
2520                                 dev_err(&adapter->pdev->dev, "Bad ether dest mask %pM\n",
2521                                         mask->dst);
2522                                 return I40E_ERR_CONFIG;
2523                         }
2524                 }
2525
2526                 if (!is_zero_ether_addr(mask->src)) {
2527                         if (is_broadcast_ether_addr(mask->src)) {
2528                                 field_flags |= IAVF_CLOUD_FIELD_IMAC;
2529                         } else {
2530                                 dev_err(&adapter->pdev->dev, "Bad ether src mask %pM\n",
2531                                         mask->src);
2532                                 return I40E_ERR_CONFIG;
2533                         }
2534                 }
2535
2536                 if (!is_zero_ether_addr(key->dst))
2537                         if (is_valid_ether_addr(key->dst) ||
2538                             is_multicast_ether_addr(key->dst)) {
2539                                 /* set the mask if a valid dst_mac address */
2540                                 for (i = 0; i < ETH_ALEN; i++)
2541                                         vf->mask.tcp_spec.dst_mac[i] |= 0xff;
2542                                 ether_addr_copy(vf->data.tcp_spec.dst_mac,
2543                                                 key->dst);
2544                         }
2545
2546                 if (!is_zero_ether_addr(key->src))
2547                         if (is_valid_ether_addr(key->src) ||
2548                             is_multicast_ether_addr(key->src)) {
2549                                 /* set the mask if a valid dst_mac address */
2550                                 for (i = 0; i < ETH_ALEN; i++)
2551                                         vf->mask.tcp_spec.src_mac[i] |= 0xff;
2552                                 ether_addr_copy(vf->data.tcp_spec.src_mac,
2553                                                 key->src);
2554                 }
2555         }
2556
2557         if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_VLAN)) {
2558                 struct flow_dissector_key_vlan *key =
2559                         skb_flow_dissector_target(f->dissector,
2560                                                   FLOW_DISSECTOR_KEY_VLAN,
2561                                                   f->key);
2562                 struct flow_dissector_key_vlan *mask =
2563                         skb_flow_dissector_target(f->dissector,
2564                                                   FLOW_DISSECTOR_KEY_VLAN,
2565                                                   f->mask);
2566
2567                 if (mask->vlan_id) {
2568                         if (mask->vlan_id == VLAN_VID_MASK) {
2569                                 field_flags |= IAVF_CLOUD_FIELD_IVLAN;
2570                         } else {
2571                                 dev_err(&adapter->pdev->dev, "Bad vlan mask %u\n",
2572                                         mask->vlan_id);
2573                                 return I40E_ERR_CONFIG;
2574                         }
2575                 }
2576                 vf->mask.tcp_spec.vlan_id |= cpu_to_be16(0xffff);
2577                 vf->data.tcp_spec.vlan_id = cpu_to_be16(key->vlan_id);
2578         }
2579
2580         if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_CONTROL)) {
2581                 struct flow_dissector_key_control *key =
2582                         skb_flow_dissector_target(f->dissector,
2583                                                   FLOW_DISSECTOR_KEY_CONTROL,
2584                                                   f->key);
2585
2586                 addr_type = key->addr_type;
2587         }
2588
2589         if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) {
2590                 struct flow_dissector_key_ipv4_addrs *key =
2591                         skb_flow_dissector_target(f->dissector,
2592                                                   FLOW_DISSECTOR_KEY_IPV4_ADDRS,
2593                                                   f->key);
2594                 struct flow_dissector_key_ipv4_addrs *mask =
2595                         skb_flow_dissector_target(f->dissector,
2596                                                   FLOW_DISSECTOR_KEY_IPV4_ADDRS,
2597                                                   f->mask);
2598
2599                 if (mask->dst) {
2600                         if (mask->dst == cpu_to_be32(0xffffffff)) {
2601                                 field_flags |= IAVF_CLOUD_FIELD_IIP;
2602                         } else {
2603                                 dev_err(&adapter->pdev->dev, "Bad ip dst mask 0x%08x\n",
2604                                         be32_to_cpu(mask->dst));
2605                                 return I40E_ERR_CONFIG;
2606                         }
2607                 }
2608
2609                 if (mask->src) {
2610                         if (mask->src == cpu_to_be32(0xffffffff)) {
2611                                 field_flags |= IAVF_CLOUD_FIELD_IIP;
2612                         } else {
2613                                 dev_err(&adapter->pdev->dev, "Bad ip src mask 0x%08x\n",
2614                                         be32_to_cpu(mask->dst));
2615                                 return I40E_ERR_CONFIG;
2616                         }
2617                 }
2618
2619                 if (field_flags & IAVF_CLOUD_FIELD_TEN_ID) {
2620                         dev_info(&adapter->pdev->dev, "Tenant id not allowed for ip filter\n");
2621                         return I40E_ERR_CONFIG;
2622                 }
2623                 if (key->dst) {
2624                         vf->mask.tcp_spec.dst_ip[0] |= cpu_to_be32(0xffffffff);
2625                         vf->data.tcp_spec.dst_ip[0] = key->dst;
2626                 }
2627                 if (key->src) {
2628                         vf->mask.tcp_spec.src_ip[0] |= cpu_to_be32(0xffffffff);
2629                         vf->data.tcp_spec.src_ip[0] = key->src;
2630                 }
2631         }
2632
2633         if (addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS) {
2634                 struct flow_dissector_key_ipv6_addrs *key =
2635                         skb_flow_dissector_target(f->dissector,
2636                                                   FLOW_DISSECTOR_KEY_IPV6_ADDRS,
2637                                                   f->key);
2638                 struct flow_dissector_key_ipv6_addrs *mask =
2639                         skb_flow_dissector_target(f->dissector,
2640                                                   FLOW_DISSECTOR_KEY_IPV6_ADDRS,
2641                                                   f->mask);
2642
2643                 /* validate mask, make sure it is not IPV6_ADDR_ANY */
2644                 if (ipv6_addr_any(&mask->dst)) {
2645                         dev_err(&adapter->pdev->dev, "Bad ipv6 dst mask 0x%02x\n",
2646                                 IPV6_ADDR_ANY);
2647                         return I40E_ERR_CONFIG;
2648                 }
2649
2650                 /* src and dest IPv6 address should not be LOOPBACK
2651                  * (0:0:0:0:0:0:0:1) which can be represented as ::1
2652                  */
2653                 if (ipv6_addr_loopback(&key->dst) ||
2654                     ipv6_addr_loopback(&key->src)) {
2655                         dev_err(&adapter->pdev->dev,
2656                                 "ipv6 addr should not be loopback\n");
2657                         return I40E_ERR_CONFIG;
2658                 }
2659                 if (!ipv6_addr_any(&mask->dst) || !ipv6_addr_any(&mask->src))
2660                         field_flags |= IAVF_CLOUD_FIELD_IIP;
2661
2662                 for (i = 0; i < 4; i++)
2663                         vf->mask.tcp_spec.dst_ip[i] |= cpu_to_be32(0xffffffff);
2664                 memcpy(&vf->data.tcp_spec.dst_ip, &key->dst.s6_addr32,
2665                        sizeof(vf->data.tcp_spec.dst_ip));
2666                 for (i = 0; i < 4; i++)
2667                         vf->mask.tcp_spec.src_ip[i] |= cpu_to_be32(0xffffffff);
2668                 memcpy(&vf->data.tcp_spec.src_ip, &key->src.s6_addr32,
2669                        sizeof(vf->data.tcp_spec.src_ip));
2670         }
2671         if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_PORTS)) {
2672                 struct flow_dissector_key_ports *key =
2673                         skb_flow_dissector_target(f->dissector,
2674                                                   FLOW_DISSECTOR_KEY_PORTS,
2675                                                   f->key);
2676                 struct flow_dissector_key_ports *mask =
2677                         skb_flow_dissector_target(f->dissector,
2678                                                   FLOW_DISSECTOR_KEY_PORTS,
2679                                                   f->mask);
2680
2681                 if (mask->src) {
2682                         if (mask->src == cpu_to_be16(0xffff)) {
2683                                 field_flags |= IAVF_CLOUD_FIELD_IIP;
2684                         } else {
2685                                 dev_err(&adapter->pdev->dev, "Bad src port mask %u\n",
2686                                         be16_to_cpu(mask->src));
2687                                 return I40E_ERR_CONFIG;
2688                         }
2689                 }
2690
2691                 if (mask->dst) {
2692                         if (mask->dst == cpu_to_be16(0xffff)) {
2693                                 field_flags |= IAVF_CLOUD_FIELD_IIP;
2694                         } else {
2695                                 dev_err(&adapter->pdev->dev, "Bad dst port mask %u\n",
2696                                         be16_to_cpu(mask->dst));
2697                                 return I40E_ERR_CONFIG;
2698                         }
2699                 }
2700                 if (key->dst) {
2701                         vf->mask.tcp_spec.dst_port |= cpu_to_be16(0xffff);
2702                         vf->data.tcp_spec.dst_port = key->dst;
2703                 }
2704
2705                 if (key->src) {
2706                         vf->mask.tcp_spec.src_port |= cpu_to_be16(0xffff);
2707                         vf->data.tcp_spec.src_port = key->src;
2708                 }
2709         }
2710         vf->field_flags = field_flags;
2711
2712         return 0;
2713 }
2714
2715 /**
2716  * iavf_handle_tclass - Forward to a traffic class on the device
2717  * @adapter: board private structure
2718  * @tc: traffic class index on the device
2719  * @filter: pointer to cloud filter structure
2720  */
2721 static int iavf_handle_tclass(struct iavf_adapter *adapter, u32 tc,
2722                               struct iavf_cloud_filter *filter)
2723 {
2724         if (tc == 0)
2725                 return 0;
2726         if (tc < adapter->num_tc) {
2727                 if (!filter->f.data.tcp_spec.dst_port) {
2728                         dev_err(&adapter->pdev->dev,
2729                                 "Specify destination port to redirect to traffic class other than TC0\n");
2730                         return -EINVAL;
2731                 }
2732         }
2733         /* redirect to a traffic class on the same device */
2734         filter->f.action = VIRTCHNL_ACTION_TC_REDIRECT;
2735         filter->f.action_meta = tc;
2736         return 0;
2737 }
2738
2739 /**
2740  * iavf_configure_clsflower - Add tc flower filters
2741  * @adapter: board private structure
2742  * @cls_flower: Pointer to struct tc_cls_flower_offload
2743  */
2744 static int iavf_configure_clsflower(struct iavf_adapter *adapter,
2745                                     struct tc_cls_flower_offload *cls_flower)
2746 {
2747         int tc = tc_classid_to_hwtc(adapter->netdev, cls_flower->classid);
2748         struct iavf_cloud_filter *filter = NULL;
2749         int err = -EINVAL, count = 50;
2750
2751         if (tc < 0) {
2752                 dev_err(&adapter->pdev->dev, "Invalid traffic class\n");
2753                 return -EINVAL;
2754         }
2755
2756         filter = kzalloc(sizeof(*filter), GFP_KERNEL);
2757         if (!filter)
2758                 return -ENOMEM;
2759
2760         while (test_and_set_bit(__IAVF_IN_CRITICAL_TASK,
2761                                 &adapter->crit_section)) {
2762                 if (--count == 0)
2763                         goto err;
2764                 udelay(1);
2765         }
2766
2767         filter->cookie = cls_flower->cookie;
2768
2769         /* set the mask to all zeroes to begin with */
2770         memset(&filter->f.mask.tcp_spec, 0, sizeof(struct virtchnl_l4_spec));
2771         /* start out with flow type and eth type IPv4 to begin with */
2772         filter->f.flow_type = VIRTCHNL_TCP_V4_FLOW;
2773         err = iavf_parse_cls_flower(adapter, cls_flower, filter);
2774         if (err < 0)
2775                 goto err;
2776
2777         err = iavf_handle_tclass(adapter, tc, filter);
2778         if (err < 0)
2779                 goto err;
2780
2781         /* add filter to the list */
2782         spin_lock_bh(&adapter->cloud_filter_list_lock);
2783         list_add_tail(&filter->list, &adapter->cloud_filter_list);
2784         adapter->num_cloud_filters++;
2785         filter->add = true;
2786         adapter->aq_required |= IAVF_FLAG_AQ_ADD_CLOUD_FILTER;
2787         spin_unlock_bh(&adapter->cloud_filter_list_lock);
2788 err:
2789         if (err)
2790                 kfree(filter);
2791
2792         clear_bit(__IAVF_IN_CRITICAL_TASK, &adapter->crit_section);
2793         return err;
2794 }
2795
2796 /* iavf_find_cf - Find the cloud filter in the list
2797  * @adapter: Board private structure
2798  * @cookie: filter specific cookie
2799  *
2800  * Returns ptr to the filter object or NULL. Must be called while holding the
2801  * cloud_filter_list_lock.
2802  */
2803 static struct iavf_cloud_filter *iavf_find_cf(struct iavf_adapter *adapter,
2804                                               unsigned long *cookie)
2805 {
2806         struct iavf_cloud_filter *filter = NULL;
2807
2808         if (!cookie)
2809                 return NULL;
2810
2811         list_for_each_entry(filter, &adapter->cloud_filter_list, list) {
2812                 if (!memcmp(cookie, &filter->cookie, sizeof(filter->cookie)))
2813                         return filter;
2814         }
2815         return NULL;
2816 }
2817
2818 /**
2819  * iavf_delete_clsflower - Remove tc flower filters
2820  * @adapter: board private structure
2821  * @cls_flower: Pointer to struct tc_cls_flower_offload
2822  */
2823 static int iavf_delete_clsflower(struct iavf_adapter *adapter,
2824                                  struct tc_cls_flower_offload *cls_flower)
2825 {
2826         struct iavf_cloud_filter *filter = NULL;
2827         int err = 0;
2828
2829         spin_lock_bh(&adapter->cloud_filter_list_lock);
2830         filter = iavf_find_cf(adapter, &cls_flower->cookie);
2831         if (filter) {
2832                 filter->del = true;
2833                 adapter->aq_required |= IAVF_FLAG_AQ_DEL_CLOUD_FILTER;
2834         } else {
2835                 err = -EINVAL;
2836         }
2837         spin_unlock_bh(&adapter->cloud_filter_list_lock);
2838
2839         return err;
2840 }
2841
2842 /**
2843  * iavf_setup_tc_cls_flower - flower classifier offloads
2844  * @netdev: net device to configure
2845  * @type_data: offload data
2846  */
2847 static int iavf_setup_tc_cls_flower(struct iavf_adapter *adapter,
2848                                     struct tc_cls_flower_offload *cls_flower)
2849 {
2850         if (cls_flower->common.chain_index)
2851                 return -EOPNOTSUPP;
2852
2853         switch (cls_flower->command) {
2854         case TC_CLSFLOWER_REPLACE:
2855                 return iavf_configure_clsflower(adapter, cls_flower);
2856         case TC_CLSFLOWER_DESTROY:
2857                 return iavf_delete_clsflower(adapter, cls_flower);
2858         case TC_CLSFLOWER_STATS:
2859                 return -EOPNOTSUPP;
2860         default:
2861                 return -EOPNOTSUPP;
2862         }
2863 }
2864
2865 /**
2866  * iavf_setup_tc_block_cb - block callback for tc
2867  * @type: type of offload
2868  * @type_data: offload data
2869  * @cb_priv:
2870  *
2871  * This function is the block callback for traffic classes
2872  **/
2873 static int iavf_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
2874                                   void *cb_priv)
2875 {
2876         switch (type) {
2877         case TC_SETUP_CLSFLOWER:
2878                 return iavf_setup_tc_cls_flower(cb_priv, type_data);
2879         default:
2880                 return -EOPNOTSUPP;
2881         }
2882 }
2883
2884 /**
2885  * iavf_setup_tc_block - register callbacks for tc
2886  * @netdev: network interface device structure
2887  * @f: tc offload data
2888  *
2889  * This function registers block callbacks for tc
2890  * offloads
2891  **/
2892 static int iavf_setup_tc_block(struct net_device *dev,
2893                                struct tc_block_offload *f)
2894 {
2895         struct iavf_adapter *adapter = netdev_priv(dev);
2896
2897         if (f->binder_type != TCF_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
2898                 return -EOPNOTSUPP;
2899
2900         switch (f->command) {
2901         case TC_BLOCK_BIND:
2902                 return tcf_block_cb_register(f->block, iavf_setup_tc_block_cb,
2903                                              adapter, adapter, f->extack);
2904         case TC_BLOCK_UNBIND:
2905                 tcf_block_cb_unregister(f->block, iavf_setup_tc_block_cb,
2906                                         adapter);
2907                 return 0;
2908         default:
2909                 return -EOPNOTSUPP;
2910         }
2911 }
2912
2913 /**
2914  * iavf_setup_tc - configure multiple traffic classes
2915  * @netdev: network interface device structure
2916  * @type: type of offload
2917  * @type_date: tc offload data
2918  *
2919  * This function is the callback to ndo_setup_tc in the
2920  * netdev_ops.
2921  *
2922  * Returns 0 on success
2923  **/
2924 static int iavf_setup_tc(struct net_device *netdev, enum tc_setup_type type,
2925                          void *type_data)
2926 {
2927         switch (type) {
2928         case TC_SETUP_QDISC_MQPRIO:
2929                 return __iavf_setup_tc(netdev, type_data);
2930         case TC_SETUP_BLOCK:
2931                 return iavf_setup_tc_block(netdev, type_data);
2932         default:
2933                 return -EOPNOTSUPP;
2934         }
2935 }
2936
2937 /**
2938  * iavf_open - Called when a network interface is made active
2939  * @netdev: network interface device structure
2940  *
2941  * Returns 0 on success, negative value on failure
2942  *
2943  * The open entry point is called when a network interface is made
2944  * active by the system (IFF_UP).  At this point all resources needed
2945  * for transmit and receive operations are allocated, the interrupt
2946  * handler is registered with the OS, the watchdog timer is started,
2947  * and the stack is notified that the interface is ready.
2948  **/
2949 static int iavf_open(struct net_device *netdev)
2950 {
2951         struct iavf_adapter *adapter = netdev_priv(netdev);
2952         int err;
2953
2954         if (adapter->flags & IAVF_FLAG_PF_COMMS_FAILED) {
2955                 dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
2956                 return -EIO;
2957         }
2958
2959         while (test_and_set_bit(__IAVF_IN_CRITICAL_TASK,
2960                                 &adapter->crit_section))
2961                 usleep_range(500, 1000);
2962
2963         if (adapter->state != __IAVF_DOWN) {
2964                 err = -EBUSY;
2965                 goto err_unlock;
2966         }
2967
2968         /* allocate transmit descriptors */
2969         err = iavf_setup_all_tx_resources(adapter);
2970         if (err)
2971                 goto err_setup_tx;
2972
2973         /* allocate receive descriptors */
2974         err = iavf_setup_all_rx_resources(adapter);
2975         if (err)
2976                 goto err_setup_rx;
2977
2978         /* clear any pending interrupts, may auto mask */
2979         err = iavf_request_traffic_irqs(adapter, netdev->name);
2980         if (err)
2981                 goto err_req_irq;
2982
2983         spin_lock_bh(&adapter->mac_vlan_list_lock);
2984
2985         iavf_add_filter(adapter, adapter->hw.mac.addr);
2986
2987         spin_unlock_bh(&adapter->mac_vlan_list_lock);
2988
2989         iavf_configure(adapter);
2990
2991         iavf_up_complete(adapter);
2992
2993         iavf_irq_enable(adapter, true);
2994
2995         clear_bit(__IAVF_IN_CRITICAL_TASK, &adapter->crit_section);
2996
2997         return 0;
2998
2999 err_req_irq:
3000         iavf_down(adapter);
3001         iavf_free_traffic_irqs(adapter);
3002 err_setup_rx:
3003         iavf_free_all_rx_resources(adapter);
3004 err_setup_tx:
3005         iavf_free_all_tx_resources(adapter);
3006 err_unlock:
3007         clear_bit(__IAVF_IN_CRITICAL_TASK, &adapter->crit_section);
3008
3009         return err;
3010 }
3011
3012 /**
3013  * iavf_close - Disables a network interface
3014  * @netdev: network interface device structure
3015  *
3016  * Returns 0, this is not allowed to fail
3017  *
3018  * The close entry point is called when an interface is de-activated
3019  * by the OS.  The hardware is still under the drivers control, but
3020  * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
3021  * are freed, along with all transmit and receive resources.
3022  **/
3023 static int iavf_close(struct net_device *netdev)
3024 {
3025         struct iavf_adapter *adapter = netdev_priv(netdev);
3026         int status;
3027
3028         if (adapter->state <= __IAVF_DOWN_PENDING)
3029                 return 0;
3030
3031         while (test_and_set_bit(__IAVF_IN_CRITICAL_TASK,
3032                                 &adapter->crit_section))
3033                 usleep_range(500, 1000);
3034
3035         set_bit(__IAVF_VSI_DOWN, adapter->vsi.state);
3036         if (CLIENT_ENABLED(adapter))
3037                 adapter->flags |= IAVF_FLAG_CLIENT_NEEDS_CLOSE;
3038
3039         iavf_down(adapter);
3040         adapter->state = __IAVF_DOWN_PENDING;
3041         iavf_free_traffic_irqs(adapter);
3042
3043         clear_bit(__IAVF_IN_CRITICAL_TASK, &adapter->crit_section);
3044
3045         /* We explicitly don't free resources here because the hardware is
3046          * still active and can DMA into memory. Resources are cleared in
3047          * iavf_virtchnl_completion() after we get confirmation from the PF
3048          * driver that the rings have been stopped.
3049          *
3050          * Also, we wait for state to transition to __IAVF_DOWN before
3051          * returning. State change occurs in iavf_virtchnl_completion() after
3052          * VF resources are released (which occurs after PF driver processes and
3053          * responds to admin queue commands).
3054          */
3055
3056         status = wait_event_timeout(adapter->down_waitqueue,
3057                                     adapter->state == __IAVF_DOWN,
3058                                     msecs_to_jiffies(200));
3059         if (!status)
3060                 netdev_warn(netdev, "Device resources not yet released\n");
3061         return 0;
3062 }
3063
3064 /**
3065  * iavf_change_mtu - Change the Maximum Transfer Unit
3066  * @netdev: network interface device structure
3067  * @new_mtu: new value for maximum frame size
3068  *
3069  * Returns 0 on success, negative on failure
3070  **/
3071 static int iavf_change_mtu(struct net_device *netdev, int new_mtu)
3072 {
3073         struct iavf_adapter *adapter = netdev_priv(netdev);
3074
3075         netdev->mtu = new_mtu;
3076         if (CLIENT_ENABLED(adapter)) {
3077                 iavf_notify_client_l2_params(&adapter->vsi);
3078                 adapter->flags |= IAVF_FLAG_SERVICE_CLIENT_REQUESTED;
3079         }
3080         adapter->flags |= IAVF_FLAG_RESET_NEEDED;
3081         schedule_work(&adapter->reset_task);
3082
3083         return 0;
3084 }
3085
3086 /**
3087  * iavf_set_features - set the netdev feature flags
3088  * @netdev: ptr to the netdev being adjusted
3089  * @features: the feature set that the stack is suggesting
3090  * Note: expects to be called while under rtnl_lock()
3091  **/
3092 static int iavf_set_features(struct net_device *netdev,
3093                              netdev_features_t features)
3094 {
3095         struct iavf_adapter *adapter = netdev_priv(netdev);
3096
3097         /* Don't allow changing VLAN_RX flag when adapter is not capable
3098          * of VLAN offload
3099          */
3100         if (!VLAN_ALLOWED(adapter)) {
3101                 if ((netdev->features ^ features) & NETIF_F_HW_VLAN_CTAG_RX)
3102                         return -EINVAL;
3103         } else if ((netdev->features ^ features) & NETIF_F_HW_VLAN_CTAG_RX) {
3104                 if (features & NETIF_F_HW_VLAN_CTAG_RX)
3105                         adapter->aq_required |=
3106                                 IAVF_FLAG_AQ_ENABLE_VLAN_STRIPPING;
3107                 else
3108                         adapter->aq_required |=
3109                                 IAVF_FLAG_AQ_DISABLE_VLAN_STRIPPING;
3110         }
3111
3112         return 0;
3113 }
3114
3115 /**
3116  * iavf_features_check - Validate encapsulated packet conforms to limits
3117  * @skb: skb buff
3118  * @dev: This physical port's netdev
3119  * @features: Offload features that the stack believes apply
3120  **/
3121 static netdev_features_t iavf_features_check(struct sk_buff *skb,
3122                                              struct net_device *dev,
3123                                              netdev_features_t features)
3124 {
3125         size_t len;
3126
3127         /* No point in doing any of this if neither checksum nor GSO are
3128          * being requested for this frame.  We can rule out both by just
3129          * checking for CHECKSUM_PARTIAL
3130          */
3131         if (skb->ip_summed != CHECKSUM_PARTIAL)
3132                 return features;
3133
3134         /* We cannot support GSO if the MSS is going to be less than
3135          * 64 bytes.  If it is then we need to drop support for GSO.
3136          */
3137         if (skb_is_gso(skb) && (skb_shinfo(skb)->gso_size < 64))
3138                 features &= ~NETIF_F_GSO_MASK;
3139
3140         /* MACLEN can support at most 63 words */
3141         len = skb_network_header(skb) - skb->data;
3142         if (len & ~(63 * 2))
3143                 goto out_err;
3144
3145         /* IPLEN and EIPLEN can support at most 127 dwords */
3146         len = skb_transport_header(skb) - skb_network_header(skb);
3147         if (len & ~(127 * 4))
3148                 goto out_err;
3149
3150         if (skb->encapsulation) {
3151                 /* L4TUNLEN can support 127 words */
3152                 len = skb_inner_network_header(skb) - skb_transport_header(skb);
3153                 if (len & ~(127 * 2))
3154                         goto out_err;
3155
3156                 /* IPLEN can support at most 127 dwords */
3157                 len = skb_inner_transport_header(skb) -
3158                       skb_inner_network_header(skb);
3159                 if (len & ~(127 * 4))
3160                         goto out_err;
3161         }
3162
3163         /* No need to validate L4LEN as TCP is the only protocol with a
3164          * a flexible value and we support all possible values supported
3165          * by TCP, which is at most 15 dwords
3166          */
3167
3168         return features;
3169 out_err:
3170         return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK);
3171 }
3172
3173 /**
3174  * iavf_fix_features - fix up the netdev feature bits
3175  * @netdev: our net device
3176  * @features: desired feature bits
3177  *
3178  * Returns fixed-up features bits
3179  **/
3180 static netdev_features_t iavf_fix_features(struct net_device *netdev,
3181                                            netdev_features_t features)
3182 {
3183         struct iavf_adapter *adapter = netdev_priv(netdev);
3184
3185         if (!(adapter->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_VLAN))
3186                 features &= ~(NETIF_F_HW_VLAN_CTAG_TX |
3187                               NETIF_F_HW_VLAN_CTAG_RX |
3188                               NETIF_F_HW_VLAN_CTAG_FILTER);
3189
3190         return features;
3191 }
3192
3193 static const struct net_device_ops iavf_netdev_ops = {
3194         .ndo_open               = iavf_open,
3195         .ndo_stop               = iavf_close,
3196         .ndo_start_xmit         = iavf_xmit_frame,
3197         .ndo_set_rx_mode        = iavf_set_rx_mode,
3198         .ndo_validate_addr      = eth_validate_addr,
3199         .ndo_set_mac_address    = iavf_set_mac,
3200         .ndo_change_mtu         = iavf_change_mtu,
3201         .ndo_tx_timeout         = iavf_tx_timeout,
3202         .ndo_vlan_rx_add_vid    = iavf_vlan_rx_add_vid,
3203         .ndo_vlan_rx_kill_vid   = iavf_vlan_rx_kill_vid,
3204         .ndo_features_check     = iavf_features_check,
3205         .ndo_fix_features       = iavf_fix_features,
3206         .ndo_set_features       = iavf_set_features,
3207         .ndo_setup_tc           = iavf_setup_tc,
3208 };
3209
3210 /**
3211  * iavf_check_reset_complete - check that VF reset is complete
3212  * @hw: pointer to hw struct
3213  *
3214  * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
3215  **/
3216 static int iavf_check_reset_complete(struct iavf_hw *hw)
3217 {
3218         u32 rstat;
3219         int i;
3220
3221         for (i = 0; i < 100; i++) {
3222                 rstat = rd32(hw, IAVF_VFGEN_RSTAT) &
3223                              IAVF_VFGEN_RSTAT_VFR_STATE_MASK;
3224                 if ((rstat == VIRTCHNL_VFR_VFACTIVE) ||
3225                     (rstat == VIRTCHNL_VFR_COMPLETED))
3226                         return 0;
3227                 usleep_range(10, 20);
3228         }
3229         return -EBUSY;
3230 }
3231
3232 /**
3233  * iavf_process_config - Process the config information we got from the PF
3234  * @adapter: board private structure
3235  *
3236  * Verify that we have a valid config struct, and set up our netdev features
3237  * and our VSI struct.
3238  **/
3239 int iavf_process_config(struct iavf_adapter *adapter)
3240 {
3241         struct virtchnl_vf_resource *vfres = adapter->vf_res;
3242         int i, num_req_queues = adapter->num_req_queues;
3243         struct net_device *netdev = adapter->netdev;
3244         struct iavf_vsi *vsi = &adapter->vsi;
3245         netdev_features_t hw_enc_features;
3246         netdev_features_t hw_features;
3247
3248         /* got VF config message back from PF, now we can parse it */
3249         for (i = 0; i < vfres->num_vsis; i++) {
3250                 if (vfres->vsi_res[i].vsi_type == VIRTCHNL_VSI_SRIOV)
3251                         adapter->vsi_res = &vfres->vsi_res[i];
3252         }
3253         if (!adapter->vsi_res) {
3254                 dev_err(&adapter->pdev->dev, "No LAN VSI found\n");
3255                 return -ENODEV;
3256         }
3257
3258         if (num_req_queues &&
3259             num_req_queues != adapter->vsi_res->num_queue_pairs) {
3260                 /* Problem.  The PF gave us fewer queues than what we had
3261                  * negotiated in our request.  Need a reset to see if we can't
3262                  * get back to a working state.
3263                  */
3264                 dev_err(&adapter->pdev->dev,
3265                         "Requested %d queues, but PF only gave us %d.\n",
3266                         num_req_queues,
3267                         adapter->vsi_res->num_queue_pairs);
3268                 adapter->flags |= IAVF_FLAG_REINIT_ITR_NEEDED;
3269                 adapter->num_req_queues = adapter->vsi_res->num_queue_pairs;
3270                 iavf_schedule_reset(adapter);
3271                 return -ENODEV;
3272         }
3273         adapter->num_req_queues = 0;
3274
3275         hw_enc_features = NETIF_F_SG                    |
3276                           NETIF_F_IP_CSUM               |
3277                           NETIF_F_IPV6_CSUM             |
3278                           NETIF_F_HIGHDMA               |
3279                           NETIF_F_SOFT_FEATURES |
3280                           NETIF_F_TSO                   |
3281                           NETIF_F_TSO_ECN               |
3282                           NETIF_F_TSO6                  |
3283                           NETIF_F_SCTP_CRC              |
3284                           NETIF_F_RXHASH                |
3285                           NETIF_F_RXCSUM                |
3286                           0;
3287
3288         /* advertise to stack only if offloads for encapsulated packets is
3289          * supported
3290          */
3291         if (vfres->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_ENCAP) {
3292                 hw_enc_features |= NETIF_F_GSO_UDP_TUNNEL       |
3293                                    NETIF_F_GSO_GRE              |
3294                                    NETIF_F_GSO_GRE_CSUM         |
3295                                    NETIF_F_GSO_IPXIP4           |
3296                                    NETIF_F_GSO_IPXIP6           |
3297                                    NETIF_F_GSO_UDP_TUNNEL_CSUM  |
3298                                    NETIF_F_GSO_PARTIAL          |
3299                                    0;
3300
3301                 if (!(vfres->vf_cap_flags &
3302                       VIRTCHNL_VF_OFFLOAD_ENCAP_CSUM))
3303                         netdev->gso_partial_features |=
3304                                 NETIF_F_GSO_UDP_TUNNEL_CSUM;
3305
3306                 netdev->gso_partial_features |= NETIF_F_GSO_GRE_CSUM;
3307                 netdev->hw_enc_features |= NETIF_F_TSO_MANGLEID;
3308                 netdev->hw_enc_features |= hw_enc_features;
3309         }
3310         /* record features VLANs can make use of */
3311         netdev->vlan_features |= hw_enc_features | NETIF_F_TSO_MANGLEID;
3312
3313         /* Write features and hw_features separately to avoid polluting
3314          * with, or dropping, features that are set when we registered.
3315          */
3316         hw_features = hw_enc_features;
3317
3318         /* Enable VLAN features if supported */
3319         if (vfres->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_VLAN)
3320                 hw_features |= (NETIF_F_HW_VLAN_CTAG_TX |
3321                                 NETIF_F_HW_VLAN_CTAG_RX);
3322         /* Enable cloud filter if ADQ is supported */
3323         if (vfres->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_ADQ)
3324                 hw_features |= NETIF_F_HW_TC;
3325
3326         netdev->hw_features |= hw_features;
3327
3328         netdev->features |= hw_features;
3329
3330         if (vfres->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_VLAN)
3331                 netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
3332
3333         netdev->priv_flags |= IFF_UNICAST_FLT;
3334
3335         /* Do not turn on offloads when they are requested to be turned off.
3336          * TSO needs minimum 576 bytes to work correctly.
3337          */
3338         if (netdev->wanted_features) {
3339                 if (!(netdev->wanted_features & NETIF_F_TSO) ||
3340                     netdev->mtu < 576)
3341                         netdev->features &= ~NETIF_F_TSO;
3342                 if (!(netdev->wanted_features & NETIF_F_TSO6) ||
3343                     netdev->mtu < 576)
3344                         netdev->features &= ~NETIF_F_TSO6;
3345                 if (!(netdev->wanted_features & NETIF_F_TSO_ECN))
3346                         netdev->features &= ~NETIF_F_TSO_ECN;
3347                 if (!(netdev->wanted_features & NETIF_F_GRO))
3348                         netdev->features &= ~NETIF_F_GRO;
3349                 if (!(netdev->wanted_features & NETIF_F_GSO))
3350                         netdev->features &= ~NETIF_F_GSO;
3351         }
3352
3353         adapter->vsi.id = adapter->vsi_res->vsi_id;
3354
3355         adapter->vsi.back = adapter;
3356         adapter->vsi.base_vector = 1;
3357         adapter->vsi.work_limit = IAVF_DEFAULT_IRQ_WORK;
3358         vsi->netdev = adapter->netdev;
3359         vsi->qs_handle = adapter->vsi_res->qset_handle;
3360         if (vfres->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_RSS_PF) {
3361                 adapter->rss_key_size = vfres->rss_key_size;
3362                 adapter->rss_lut_size = vfres->rss_lut_size;
3363         } else {
3364                 adapter->rss_key_size = IAVF_HKEY_ARRAY_SIZE;
3365                 adapter->rss_lut_size = IAVF_HLUT_ARRAY_SIZE;
3366         }
3367
3368         return 0;
3369 }
3370
3371 /**
3372  * iavf_init_task - worker thread to perform delayed initialization
3373  * @work: pointer to work_struct containing our data
3374  *
3375  * This task completes the work that was begun in probe. Due to the nature
3376  * of VF-PF communications, we may need to wait tens of milliseconds to get
3377  * responses back from the PF. Rather than busy-wait in probe and bog down the
3378  * whole system, we'll do it in a task so we can sleep.
3379  * This task only runs during driver init. Once we've established
3380  * communications with the PF driver and set up our netdev, the watchdog
3381  * takes over.
3382  **/
3383 static void iavf_init_task(struct work_struct *work)
3384 {
3385         struct iavf_adapter *adapter = container_of(work,
3386                                                       struct iavf_adapter,
3387                                                       init_task.work);
3388         struct net_device *netdev = adapter->netdev;
3389         struct iavf_hw *hw = &adapter->hw;
3390         struct pci_dev *pdev = adapter->pdev;
3391         int err, bufsz;
3392
3393         switch (adapter->state) {
3394         case __IAVF_STARTUP:
3395                 /* driver loaded, probe complete */
3396                 adapter->flags &= ~IAVF_FLAG_PF_COMMS_FAILED;
3397                 adapter->flags &= ~IAVF_FLAG_RESET_PENDING;
3398                 err = iavf_set_mac_type(hw);
3399                 if (err) {
3400                         dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
3401                                 err);
3402                         goto err;
3403                 }
3404                 err = iavf_check_reset_complete(hw);
3405                 if (err) {
3406                         dev_info(&pdev->dev, "Device is still in reset (%d), retrying\n",
3407                                  err);
3408                         goto err;
3409                 }
3410                 hw->aq.num_arq_entries = IAVF_AQ_LEN;
3411                 hw->aq.num_asq_entries = IAVF_AQ_LEN;
3412                 hw->aq.arq_buf_size = IAVF_MAX_AQ_BUF_SIZE;
3413                 hw->aq.asq_buf_size = IAVF_MAX_AQ_BUF_SIZE;
3414
3415                 err = iavf_init_adminq(hw);
3416                 if (err) {
3417                         dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
3418                                 err);
3419                         goto err;
3420                 }
3421                 err = iavf_send_api_ver(adapter);
3422                 if (err) {
3423                         dev_err(&pdev->dev, "Unable to send to PF (%d)\n", err);
3424                         iavf_shutdown_adminq(hw);
3425                         goto err;
3426                 }
3427                 adapter->state = __IAVF_INIT_VERSION_CHECK;
3428                 goto restart;
3429         case __IAVF_INIT_VERSION_CHECK:
3430                 if (!iavf_asq_done(hw)) {
3431                         dev_err(&pdev->dev, "Admin queue command never completed\n");
3432                         iavf_shutdown_adminq(hw);
3433                         adapter->state = __IAVF_STARTUP;
3434                         goto err;
3435                 }
3436
3437                 /* aq msg sent, awaiting reply */
3438                 err = iavf_verify_api_ver(adapter);
3439                 if (err) {
3440                         if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
3441                                 err = iavf_send_api_ver(adapter);
3442                         else
3443                                 dev_err(&pdev->dev, "Unsupported PF API version %d.%d, expected %d.%d\n",
3444                                         adapter->pf_version.major,
3445                                         adapter->pf_version.minor,
3446                                         VIRTCHNL_VERSION_MAJOR,
3447                                         VIRTCHNL_VERSION_MINOR);
3448                         goto err;
3449                 }
3450                 err = iavf_send_vf_config_msg(adapter);
3451                 if (err) {
3452                         dev_err(&pdev->dev, "Unable to send config request (%d)\n",
3453                                 err);
3454                         goto err;
3455                 }
3456                 adapter->state = __IAVF_INIT_GET_RESOURCES;
3457                 goto restart;
3458         case __IAVF_INIT_GET_RESOURCES:
3459                 /* aq msg sent, awaiting reply */
3460                 if (!adapter->vf_res) {
3461                         bufsz = sizeof(struct virtchnl_vf_resource) +
3462                                 (IAVF_MAX_VF_VSI *
3463                                  sizeof(struct virtchnl_vsi_resource));
3464                         adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
3465                         if (!adapter->vf_res)
3466                                 goto err;
3467                 }
3468                 err = iavf_get_vf_config(adapter);
3469                 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK) {
3470                         err = iavf_send_vf_config_msg(adapter);
3471                         goto err;
3472                 } else if (err == I40E_ERR_PARAM) {
3473                         /* We only get ERR_PARAM if the device is in a very bad
3474                          * state or if we've been disabled for previous bad
3475                          * behavior. Either way, we're done now.
3476                          */
3477                         iavf_shutdown_adminq(hw);
3478                         dev_err(&pdev->dev, "Unable to get VF config due to PF error condition, not retrying\n");
3479                         return;
3480                 }
3481                 if (err) {
3482                         dev_err(&pdev->dev, "Unable to get VF config (%d)\n",
3483                                 err);
3484                         goto err_alloc;
3485                 }
3486                 adapter->state = __IAVF_INIT_SW;
3487                 break;
3488         default:
3489                 goto err_alloc;
3490         }
3491
3492         if (iavf_process_config(adapter))
3493                 goto err_alloc;
3494         adapter->current_op = VIRTCHNL_OP_UNKNOWN;
3495
3496         adapter->flags |= IAVF_FLAG_RX_CSUM_ENABLED;
3497
3498         netdev->netdev_ops = &iavf_netdev_ops;
3499         iavf_set_ethtool_ops(netdev);
3500         netdev->watchdog_timeo = 5 * HZ;
3501
3502         /* MTU range: 68 - 9710 */
3503         netdev->min_mtu = ETH_MIN_MTU;
3504         netdev->max_mtu = IAVF_MAX_RXBUFFER - IAVF_PACKET_HDR_PAD;
3505
3506         if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
3507                 dev_info(&pdev->dev, "Invalid MAC address %pM, using random\n",
3508                          adapter->hw.mac.addr);
3509                 eth_hw_addr_random(netdev);
3510                 ether_addr_copy(adapter->hw.mac.addr, netdev->dev_addr);
3511         } else {
3512                 adapter->flags |= IAVF_FLAG_ADDR_SET_BY_PF;
3513                 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
3514                 ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
3515         }
3516
3517         timer_setup(&adapter->watchdog_timer, iavf_watchdog_timer, 0);
3518         mod_timer(&adapter->watchdog_timer, jiffies + 1);
3519
3520         adapter->tx_desc_count = IAVF_DEFAULT_TXD;
3521         adapter->rx_desc_count = IAVF_DEFAULT_RXD;
3522         err = iavf_init_interrupt_scheme(adapter);
3523         if (err)
3524                 goto err_sw_init;
3525         iavf_map_rings_to_vectors(adapter);
3526         if (adapter->vf_res->vf_cap_flags &
3527             VIRTCHNL_VF_OFFLOAD_WB_ON_ITR)
3528                 adapter->flags |= IAVF_FLAG_WB_ON_ITR_CAPABLE;
3529
3530         err = iavf_request_misc_irq(adapter);
3531         if (err)
3532                 goto err_sw_init;
3533
3534         netif_carrier_off(netdev);
3535         adapter->link_up = false;
3536
3537         if (!adapter->netdev_registered) {
3538                 err = register_netdev(netdev);
3539                 if (err)
3540                         goto err_register;
3541         }
3542
3543         adapter->netdev_registered = true;
3544
3545         netif_tx_stop_all_queues(netdev);
3546         if (CLIENT_ALLOWED(adapter)) {
3547                 err = iavf_lan_add_device(adapter);
3548                 if (err)
3549                         dev_info(&pdev->dev, "Failed to add VF to client API service list: %d\n",
3550                                  err);
3551         }
3552
3553         dev_info(&pdev->dev, "MAC address: %pM\n", adapter->hw.mac.addr);
3554         if (netdev->features & NETIF_F_GRO)
3555                 dev_info(&pdev->dev, "GRO is enabled\n");
3556
3557         adapter->state = __IAVF_DOWN;
3558         set_bit(__IAVF_VSI_DOWN, adapter->vsi.state);
3559         iavf_misc_irq_enable(adapter);
3560         wake_up(&adapter->down_waitqueue);
3561
3562         adapter->rss_key = kzalloc(adapter->rss_key_size, GFP_KERNEL);
3563         adapter->rss_lut = kzalloc(adapter->rss_lut_size, GFP_KERNEL);
3564         if (!adapter->rss_key || !adapter->rss_lut)
3565                 goto err_mem;
3566
3567         if (RSS_AQ(adapter)) {
3568                 adapter->aq_required |= IAVF_FLAG_AQ_CONFIGURE_RSS;
3569                 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
3570         } else {
3571                 iavf_init_rss(adapter);
3572         }
3573         return;
3574 restart:
3575         schedule_delayed_work(&adapter->init_task, msecs_to_jiffies(30));
3576         return;
3577 err_mem:
3578         iavf_free_rss(adapter);
3579 err_register:
3580         iavf_free_misc_irq(adapter);
3581 err_sw_init:
3582         iavf_reset_interrupt_capability(adapter);
3583 err_alloc:
3584         kfree(adapter->vf_res);
3585         adapter->vf_res = NULL;
3586 err:
3587         /* Things went into the weeds, so try again later */
3588         if (++adapter->aq_wait_count > IAVF_AQ_MAX_ERR) {
3589                 dev_err(&pdev->dev, "Failed to communicate with PF; waiting before retry\n");
3590                 adapter->flags |= IAVF_FLAG_PF_COMMS_FAILED;
3591                 iavf_shutdown_adminq(hw);
3592                 adapter->state = __IAVF_STARTUP;
3593                 schedule_delayed_work(&adapter->init_task, HZ * 5);
3594                 return;
3595         }
3596         schedule_delayed_work(&adapter->init_task, HZ);
3597 }
3598
3599 /**
3600  * iavf_shutdown - Shutdown the device in preparation for a reboot
3601  * @pdev: pci device structure
3602  **/
3603 static void iavf_shutdown(struct pci_dev *pdev)
3604 {
3605         struct net_device *netdev = pci_get_drvdata(pdev);
3606         struct iavf_adapter *adapter = netdev_priv(netdev);
3607
3608         netif_device_detach(netdev);
3609
3610         if (netif_running(netdev))
3611                 iavf_close(netdev);
3612
3613         /* Prevent the watchdog from running. */
3614         adapter->state = __IAVF_REMOVE;
3615         adapter->aq_required = 0;
3616
3617 #ifdef CONFIG_PM
3618         pci_save_state(pdev);
3619
3620 #endif
3621         pci_disable_device(pdev);
3622 }
3623
3624 /**
3625  * iavf_probe - Device Initialization Routine
3626  * @pdev: PCI device information struct
3627  * @ent: entry in iavf_pci_tbl
3628  *
3629  * Returns 0 on success, negative on failure
3630  *
3631  * iavf_probe initializes an adapter identified by a pci_dev structure.
3632  * The OS initialization, configuring of the adapter private structure,
3633  * and a hardware reset occur.
3634  **/
3635 static int iavf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3636 {
3637         struct net_device *netdev;
3638         struct iavf_adapter *adapter = NULL;
3639         struct iavf_hw *hw = NULL;
3640         int err;
3641
3642         err = pci_enable_device(pdev);
3643         if (err)
3644                 return err;
3645
3646         err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
3647         if (err) {
3648                 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
3649                 if (err) {
3650                         dev_err(&pdev->dev,
3651                                 "DMA configuration failed: 0x%x\n", err);
3652                         goto err_dma;
3653                 }
3654         }
3655
3656         err = pci_request_regions(pdev, iavf_driver_name);
3657         if (err) {
3658                 dev_err(&pdev->dev,
3659                         "pci_request_regions failed 0x%x\n", err);
3660                 goto err_pci_reg;
3661         }
3662
3663         pci_enable_pcie_error_reporting(pdev);
3664
3665         pci_set_master(pdev);
3666
3667         netdev = alloc_etherdev_mq(sizeof(struct iavf_adapter),
3668                                    IAVF_MAX_REQ_QUEUES);
3669         if (!netdev) {
3670                 err = -ENOMEM;
3671                 goto err_alloc_etherdev;
3672         }
3673
3674         SET_NETDEV_DEV(netdev, &pdev->dev);
3675
3676         pci_set_drvdata(pdev, netdev);
3677         adapter = netdev_priv(netdev);
3678
3679         adapter->netdev = netdev;
3680         adapter->pdev = pdev;
3681
3682         hw = &adapter->hw;
3683         hw->back = adapter;
3684
3685         adapter->msg_enable = BIT(DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
3686         adapter->state = __IAVF_STARTUP;
3687
3688         /* Call save state here because it relies on the adapter struct. */
3689         pci_save_state(pdev);
3690
3691         hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
3692                               pci_resource_len(pdev, 0));
3693         if (!hw->hw_addr) {
3694                 err = -EIO;
3695                 goto err_ioremap;
3696         }
3697         hw->vendor_id = pdev->vendor;
3698         hw->device_id = pdev->device;
3699         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
3700         hw->subsystem_vendor_id = pdev->subsystem_vendor;
3701         hw->subsystem_device_id = pdev->subsystem_device;
3702         hw->bus.device = PCI_SLOT(pdev->devfn);
3703         hw->bus.func = PCI_FUNC(pdev->devfn);
3704         hw->bus.bus_id = pdev->bus->number;
3705
3706         /* set up the locks for the AQ, do this only once in probe
3707          * and destroy them only once in remove
3708          */
3709         mutex_init(&hw->aq.asq_mutex);
3710         mutex_init(&hw->aq.arq_mutex);
3711
3712         spin_lock_init(&adapter->mac_vlan_list_lock);
3713         spin_lock_init(&adapter->cloud_filter_list_lock);
3714
3715         INIT_LIST_HEAD(&adapter->mac_filter_list);
3716         INIT_LIST_HEAD(&adapter->vlan_filter_list);
3717         INIT_LIST_HEAD(&adapter->cloud_filter_list);
3718
3719         INIT_WORK(&adapter->reset_task, iavf_reset_task);
3720         INIT_WORK(&adapter->adminq_task, iavf_adminq_task);
3721         INIT_WORK(&adapter->watchdog_task, iavf_watchdog_task);
3722         INIT_DELAYED_WORK(&adapter->client_task, iavf_client_task);
3723         INIT_DELAYED_WORK(&adapter->init_task, iavf_init_task);
3724         schedule_delayed_work(&adapter->init_task,
3725                               msecs_to_jiffies(5 * (pdev->devfn & 0x07)));
3726
3727         /* Setup the wait queue for indicating transition to down status */
3728         init_waitqueue_head(&adapter->down_waitqueue);
3729
3730         return 0;
3731
3732 err_ioremap:
3733         free_netdev(netdev);
3734 err_alloc_etherdev:
3735         pci_release_regions(pdev);
3736 err_pci_reg:
3737 err_dma:
3738         pci_disable_device(pdev);
3739         return err;
3740 }
3741
3742 #ifdef CONFIG_PM
3743 /**
3744  * iavf_suspend - Power management suspend routine
3745  * @pdev: PCI device information struct
3746  * @state: unused
3747  *
3748  * Called when the system (VM) is entering sleep/suspend.
3749  **/
3750 static int iavf_suspend(struct pci_dev *pdev, pm_message_t state)
3751 {
3752         struct net_device *netdev = pci_get_drvdata(pdev);
3753         struct iavf_adapter *adapter = netdev_priv(netdev);
3754         int retval = 0;
3755
3756         netif_device_detach(netdev);
3757
3758         while (test_and_set_bit(__IAVF_IN_CRITICAL_TASK,
3759                                 &adapter->crit_section))
3760                 usleep_range(500, 1000);
3761
3762         if (netif_running(netdev)) {
3763                 rtnl_lock();
3764                 iavf_down(adapter);
3765                 rtnl_unlock();
3766         }
3767         iavf_free_misc_irq(adapter);
3768         iavf_reset_interrupt_capability(adapter);
3769
3770         clear_bit(__IAVF_IN_CRITICAL_TASK, &adapter->crit_section);
3771
3772         retval = pci_save_state(pdev);
3773         if (retval)
3774                 return retval;
3775
3776         pci_disable_device(pdev);
3777
3778         return 0;
3779 }
3780
3781 /**
3782  * iavf_resume - Power management resume routine
3783  * @pdev: PCI device information struct
3784  *
3785  * Called when the system (VM) is resumed from sleep/suspend.
3786  **/
3787 static int iavf_resume(struct pci_dev *pdev)
3788 {
3789         struct iavf_adapter *adapter = pci_get_drvdata(pdev);
3790         struct net_device *netdev = adapter->netdev;
3791         u32 err;
3792
3793         pci_set_power_state(pdev, PCI_D0);
3794         pci_restore_state(pdev);
3795         /* pci_restore_state clears dev->state_saved so call
3796          * pci_save_state to restore it.
3797          */
3798         pci_save_state(pdev);
3799
3800         err = pci_enable_device_mem(pdev);
3801         if (err) {
3802                 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
3803                 return err;
3804         }
3805         pci_set_master(pdev);
3806
3807         rtnl_lock();
3808         err = iavf_set_interrupt_capability(adapter);
3809         if (err) {
3810                 rtnl_unlock();
3811                 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
3812                 return err;
3813         }
3814         err = iavf_request_misc_irq(adapter);
3815         rtnl_unlock();
3816         if (err) {
3817                 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
3818                 return err;
3819         }
3820
3821         schedule_work(&adapter->reset_task);
3822
3823         netif_device_attach(netdev);
3824
3825         return err;
3826 }
3827
3828 #endif /* CONFIG_PM */
3829 /**
3830  * iavf_remove - Device Removal Routine
3831  * @pdev: PCI device information struct
3832  *
3833  * iavf_remove is called by the PCI subsystem to alert the driver
3834  * that it should release a PCI device.  The could be caused by a
3835  * Hot-Plug event, or because the driver is going to be removed from
3836  * memory.
3837  **/
3838 static void iavf_remove(struct pci_dev *pdev)
3839 {
3840         struct net_device *netdev = pci_get_drvdata(pdev);
3841         struct iavf_adapter *adapter = netdev_priv(netdev);
3842         struct iavf_vlan_filter *vlf, *vlftmp;
3843         struct iavf_mac_filter *f, *ftmp;
3844         struct iavf_cloud_filter *cf, *cftmp;
3845         struct iavf_hw *hw = &adapter->hw;
3846         int err;
3847         /* Indicate we are in remove and not to run reset_task */
3848         set_bit(__IAVF_IN_REMOVE_TASK, &adapter->crit_section);
3849         cancel_delayed_work_sync(&adapter->init_task);
3850         cancel_work_sync(&adapter->reset_task);
3851         cancel_delayed_work_sync(&adapter->client_task);
3852         if (adapter->netdev_registered) {
3853                 unregister_netdev(netdev);
3854                 adapter->netdev_registered = false;
3855         }
3856         if (CLIENT_ALLOWED(adapter)) {
3857                 err = iavf_lan_del_device(adapter);
3858                 if (err)
3859                         dev_warn(&pdev->dev, "Failed to delete client device: %d\n",
3860                                  err);
3861         }
3862
3863         /* Shut down all the garbage mashers on the detention level */
3864         adapter->state = __IAVF_REMOVE;
3865         adapter->aq_required = 0;
3866         adapter->flags &= ~IAVF_FLAG_REINIT_ITR_NEEDED;
3867         iavf_request_reset(adapter);
3868         msleep(50);
3869         /* If the FW isn't responding, kick it once, but only once. */
3870         if (!iavf_asq_done(hw)) {
3871                 iavf_request_reset(adapter);
3872                 msleep(50);
3873         }
3874         iavf_free_all_tx_resources(adapter);
3875         iavf_free_all_rx_resources(adapter);
3876         iavf_misc_irq_disable(adapter);
3877         iavf_free_misc_irq(adapter);
3878         iavf_reset_interrupt_capability(adapter);
3879         iavf_free_q_vectors(adapter);
3880
3881         if (adapter->watchdog_timer.function)
3882                 del_timer_sync(&adapter->watchdog_timer);
3883
3884         cancel_work_sync(&adapter->adminq_task);
3885
3886         iavf_free_rss(adapter);
3887
3888         if (hw->aq.asq.count)
3889                 iavf_shutdown_adminq(hw);
3890
3891         /* destroy the locks only once, here */
3892         mutex_destroy(&hw->aq.arq_mutex);
3893         mutex_destroy(&hw->aq.asq_mutex);
3894
3895         iounmap(hw->hw_addr);
3896         pci_release_regions(pdev);
3897         iavf_free_all_tx_resources(adapter);
3898         iavf_free_all_rx_resources(adapter);
3899         iavf_free_queues(adapter);
3900         kfree(adapter->vf_res);
3901         spin_lock_bh(&adapter->mac_vlan_list_lock);
3902         /* If we got removed before an up/down sequence, we've got a filter
3903          * hanging out there that we need to get rid of.
3904          */
3905         list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
3906                 list_del(&f->list);
3907                 kfree(f);
3908         }
3909         list_for_each_entry_safe(vlf, vlftmp, &adapter->vlan_filter_list,
3910                                  list) {
3911                 list_del(&vlf->list);
3912                 kfree(vlf);
3913         }
3914
3915         spin_unlock_bh(&adapter->mac_vlan_list_lock);
3916
3917         spin_lock_bh(&adapter->cloud_filter_list_lock);
3918         list_for_each_entry_safe(cf, cftmp, &adapter->cloud_filter_list, list) {
3919                 list_del(&cf->list);
3920                 kfree(cf);
3921         }
3922         spin_unlock_bh(&adapter->cloud_filter_list_lock);
3923
3924         free_netdev(netdev);
3925
3926         pci_disable_pcie_error_reporting(pdev);
3927
3928         pci_disable_device(pdev);
3929 }
3930
3931 static struct pci_driver iavf_driver = {
3932         .name     = iavf_driver_name,
3933         .id_table = iavf_pci_tbl,
3934         .probe    = iavf_probe,
3935         .remove   = iavf_remove,
3936 #ifdef CONFIG_PM
3937         .suspend  = iavf_suspend,
3938         .resume   = iavf_resume,
3939 #endif
3940         .shutdown = iavf_shutdown,
3941 };
3942
3943 /**
3944  * iavf_init_module - Driver Registration Routine
3945  *
3946  * iavf_init_module is the first routine called when the driver is
3947  * loaded. All it does is register with the PCI subsystem.
3948  **/
3949 static int __init iavf_init_module(void)
3950 {
3951         int ret;
3952
3953         pr_info("iavf: %s - version %s\n", iavf_driver_string,
3954                 iavf_driver_version);
3955
3956         pr_info("%s\n", iavf_copyright);
3957
3958         iavf_wq = alloc_workqueue("%s", WQ_UNBOUND | WQ_MEM_RECLAIM, 1,
3959                                   iavf_driver_name);
3960         if (!iavf_wq) {
3961                 pr_err("%s: Failed to create workqueue\n", iavf_driver_name);
3962                 return -ENOMEM;
3963         }
3964         ret = pci_register_driver(&iavf_driver);
3965         return ret;
3966 }
3967
3968 module_init(iavf_init_module);
3969
3970 /**
3971  * iavf_exit_module - Driver Exit Cleanup Routine
3972  *
3973  * iavf_exit_module is called just before the driver is removed
3974  * from memory.
3975  **/
3976 static void __exit iavf_exit_module(void)
3977 {
3978         pci_unregister_driver(&iavf_driver);
3979         destroy_workqueue(iavf_wq);
3980 }
3981
3982 module_exit(iavf_exit_module);
3983
3984 /* iavf_main.c */