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

   1 // SPDX-License-Identifier: GPL-2.0
   2 /* Copyright(c) 2013 - 2018 Intel Corporation. */
   3
   4 #include "i40evf.h"
   5 #include "i40e_prototype.h"
   6 #include "i40evf_client.h"
   7 /* All i40evf 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 "i40e_trace.h"
  13
  14 static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter);
  15 static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter);
  16 static int i40evf_close(struct net_device *netdev);
  17
  18 char i40evf_driver_name[] = "i40evf";
  19 static const char i40evf_driver_string[] =
  20         "Intel(R) 40-10 Gigabit 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 2
  27 #define DRV_VERSION __stringify(DRV_VERSION_MAJOR) "." \
  28              __stringify(DRV_VERSION_MINOR) "." \
  29              __stringify(DRV_VERSION_BUILD) \
  30              DRV_KERN
  31 const char i40evf_driver_version[] = DRV_VERSION;
  32 static const char i40evf_copyright[] =
  33         "Copyright (c) 2013 - 2015 Intel Corporation.";
  34
  35 /* i40evf_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 i40evf_pci_tbl[] = {
  44         {PCI_VDEVICE(INTEL, I40E_DEV_ID_VF), 0},
  45         {PCI_VDEVICE(INTEL, I40E_DEV_ID_VF_HV), 0},
  46         {PCI_VDEVICE(INTEL, I40E_DEV_ID_X722_VF), 0},
  47         {PCI_VDEVICE(INTEL, I40E_DEV_ID_ADAPTIVE_VF), 0},
  48         /* required last entry */
  49         {0, }
  50 };
  51
  52 MODULE_DEVICE_TABLE(pci, i40evf_pci_tbl);
  53
  54 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
  55 MODULE_DESCRIPTION("Intel(R) XL710 X710 Virtual Function Network Driver");
  56 MODULE_LICENSE("GPL");
  57 MODULE_VERSION(DRV_VERSION);
  58
  59 static struct workqueue_struct *i40evf_wq;
  60
  61 /**
  62  * i40evf_allocate_dma_mem_d - OS specific memory alloc for shared code
  63  * @hw:   pointer to the HW structure
  64  * @mem:  ptr to mem struct to fill out
  65  * @size: size of memory requested
  66  * @alignment: what to align the allocation to
  67  **/
  68 i40e_status i40evf_allocate_dma_mem_d(struct i40e_hw *hw,
  69                                       struct i40e_dma_mem *mem,
  70                                       u64 size, u32 alignment)
  71 {
  72         struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
  73
  74         if (!mem)
  75                 return I40E_ERR_PARAM;
  76
  77         mem->size = ALIGN(size, alignment);
  78         mem->va = dma_alloc_coherent(&adapter->pdev->dev, mem->size,
  79                                      (dma_addr_t *)&mem->pa, GFP_KERNEL);
  80         if (mem->va)
  81                 return 0;
  82         else
  83                 return I40E_ERR_NO_MEMORY;
  84 }
  85
  86 /**
  87  * i40evf_free_dma_mem_d - OS specific memory free for shared code
  88  * @hw:   pointer to the HW structure
  89  * @mem:  ptr to mem struct to free
  90  **/
  91 i40e_status i40evf_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem)
  92 {
  93         struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
  94
  95         if (!mem || !mem->va)
  96                 return I40E_ERR_PARAM;
  97         dma_free_coherent(&adapter->pdev->dev, mem->size,
  98                           mem->va, (dma_addr_t)mem->pa);
  99         return 0;
 100 }
 101
 102 /**
 103  * i40evf_allocate_virt_mem_d - OS specific memory alloc for shared code
 104  * @hw:   pointer to the HW structure
 105  * @mem:  ptr to mem struct to fill out
 106  * @size: size of memory requested
 107  **/
 108 i40e_status i40evf_allocate_virt_mem_d(struct i40e_hw *hw,
 109                                        struct i40e_virt_mem *mem, u32 size)
 110 {
 111         if (!mem)
 112                 return I40E_ERR_PARAM;
 113
 114         mem->size = size;
 115         mem->va = kzalloc(size, GFP_KERNEL);
 116
 117         if (mem->va)
 118                 return 0;
 119         else
 120                 return I40E_ERR_NO_MEMORY;
 121 }
 122
 123 /**
 124  * i40evf_free_virt_mem_d - OS specific memory free for shared code
 125  * @hw:   pointer to the HW structure
 126  * @mem:  ptr to mem struct to free
 127  **/
 128 i40e_status i40evf_free_virt_mem_d(struct i40e_hw *hw,
 129                                    struct i40e_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  * i40evf_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 i40evf_debug_d(void *hw, u32 mask, char *fmt_str, ...)
 147 {
 148         char buf[512];
 149         va_list argptr;
 150
 151         if (!(mask & ((struct i40e_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  * i40evf_schedule_reset - Set the flags and schedule a reset event
 164  * @adapter: board private structure
 165  **/
 166 void i40evf_schedule_reset(struct i40evf_adapter *adapter)
 167 {
 168         if (!(adapter->flags &
 169               (I40EVF_FLAG_RESET_PENDING | I40EVF_FLAG_RESET_NEEDED))) {
 170                 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
 171                 schedule_work(&adapter->reset_task);
 172         }
 173 }
 174
 175 /**
 176  * i40evf_tx_timeout - Respond to a Tx Hang
 177  * @netdev: network interface device structure
 178  **/
 179 static void i40evf_tx_timeout(struct net_device *netdev)
 180 {
 181         struct i40evf_adapter *adapter = netdev_priv(netdev);
 182
 183         adapter->tx_timeout_count++;
 184         i40evf_schedule_reset(adapter);
 185 }
 186
 187 /**
 188  * i40evf_misc_irq_disable - Mask off interrupt generation on the NIC
 189  * @adapter: board private structure
 190  **/
 191 static void i40evf_misc_irq_disable(struct i40evf_adapter *adapter)
 192 {
 193         struct i40e_hw *hw = &adapter->hw;
 194
 195         if (!adapter->msix_entries)
 196                 return;
 197
 198         wr32(hw, I40E_VFINT_DYN_CTL01, 0);
 199
 200         /* read flush */
 201         rd32(hw, I40E_VFGEN_RSTAT);
 202
 203         synchronize_irq(adapter->msix_entries[0].vector);
 204 }
 205
 206 /**
 207  * i40evf_misc_irq_enable - Enable default interrupt generation settings
 208  * @adapter: board private structure
 209  **/
 210 static void i40evf_misc_irq_enable(struct i40evf_adapter *adapter)
 211 {
 212         struct i40e_hw *hw = &adapter->hw;
 213
 214         wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK |
 215                                        I40E_VFINT_DYN_CTL01_ITR_INDX_MASK);
 216         wr32(hw, I40E_VFINT_ICR0_ENA1, I40E_VFINT_ICR0_ENA1_ADMINQ_MASK);
 217
 218         /* read flush */
 219         rd32(hw, I40E_VFGEN_RSTAT);
 220 }
 221
 222 /**
 223  * i40evf_irq_disable - Mask off interrupt generation on the NIC
 224  * @adapter: board private structure
 225  **/
 226 static void i40evf_irq_disable(struct i40evf_adapter *adapter)
 227 {
 228         int i;
 229         struct i40e_hw *hw = &adapter->hw;
 230
 231         if (!adapter->msix_entries)
 232                 return;
 233
 234         for (i = 1; i < adapter->num_msix_vectors; i++) {
 235                 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), 0);
 236                 synchronize_irq(adapter->msix_entries[i].vector);
 237         }
 238         /* read flush */
 239         rd32(hw, I40E_VFGEN_RSTAT);
 240 }
 241
 242 /**
 243  * i40evf_irq_enable_queues - Enable interrupt for specified queues
 244  * @adapter: board private structure
 245  * @mask: bitmap of queues to enable
 246  **/
 247 void i40evf_irq_enable_queues(struct i40evf_adapter *adapter, u32 mask)
 248 {
 249         struct i40e_hw *hw = &adapter->hw;
 250         int i;
 251
 252         for (i = 1; i < adapter->num_msix_vectors; i++) {
 253                 if (mask & BIT(i - 1)) {
 254                         wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1),
 255                              I40E_VFINT_DYN_CTLN1_INTENA_MASK |
 256                              I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK);
 257                 }
 258         }
 259 }
 260
 261 /**
 262  * i40evf_irq_enable - Enable default interrupt generation settings
 263  * @adapter: board private structure
 264  * @flush: boolean value whether to run rd32()
 265  **/
 266 void i40evf_irq_enable(struct i40evf_adapter *adapter, bool flush)
 267 {
 268         struct i40e_hw *hw = &adapter->hw;
 269
 270         i40evf_misc_irq_enable(adapter);
 271         i40evf_irq_enable_queues(adapter, ~0);
 272
 273         if (flush)
 274                 rd32(hw, I40E_VFGEN_RSTAT);
 275 }
 276
 277 /**
 278  * i40evf_msix_aq - Interrupt handler for vector 0
 279  * @irq: interrupt number
 280  * @data: pointer to netdev
 281  **/
 282 static irqreturn_t i40evf_msix_aq(int irq, void *data)
 283 {
 284         struct net_device *netdev = data;
 285         struct i40evf_adapter *adapter = netdev_priv(netdev);
 286         struct i40e_hw *hw = &adapter->hw;
 287
 288         /* handle non-queue interrupts, these reads clear the registers */
 289         rd32(hw, I40E_VFINT_ICR01);
 290         rd32(hw, I40E_VFINT_ICR0_ENA1);
 291
 292         /* schedule work on the private workqueue */
 293         schedule_work(&adapter->adminq_task);
 294
 295         return IRQ_HANDLED;
 296 }
 297
 298 /**
 299  * i40evf_msix_clean_rings - MSIX mode Interrupt Handler
 300  * @irq: interrupt number
 301  * @data: pointer to a q_vector
 302  **/
 303 static irqreturn_t i40evf_msix_clean_rings(int irq, void *data)
 304 {
 305         struct i40e_q_vector *q_vector = data;
 306
 307         if (!q_vector->tx.ring && !q_vector->rx.ring)
 308                 return IRQ_HANDLED;
 309
 310         napi_schedule_irqoff(&q_vector->napi);
 311
 312         return IRQ_HANDLED;
 313 }
 314
 315 /**
 316  * i40evf_map_vector_to_rxq - associate irqs with rx queues
 317  * @adapter: board private structure
 318  * @v_idx: interrupt number
 319  * @r_idx: queue number
 320  **/
 321 static void
 322 i40evf_map_vector_to_rxq(struct i40evf_adapter *adapter, int v_idx, int r_idx)
 323 {
 324         struct i40e_q_vector *q_vector = &adapter->q_vectors[v_idx];
 325         struct i40e_ring *rx_ring = &adapter->rx_rings[r_idx];
 326         struct i40e_hw *hw = &adapter->hw;
 327
 328         rx_ring->q_vector = q_vector;
 329         rx_ring->next = q_vector->rx.ring;
 330         rx_ring->vsi = &adapter->vsi;
 331         q_vector->rx.ring = rx_ring;
 332         q_vector->rx.count++;
 333         q_vector->rx.next_update = jiffies + 1;
 334         q_vector->rx.target_itr = ITR_TO_REG(rx_ring->itr_setting);
 335         q_vector->ring_mask |= BIT(r_idx);
 336         wr32(hw, I40E_VFINT_ITRN1(I40E_RX_ITR, q_vector->reg_idx),
 337              q_vector->rx.current_itr);
 338         q_vector->rx.current_itr = q_vector->rx.target_itr;
 339 }
 340
 341 /**
 342  * i40evf_map_vector_to_txq - associate irqs with tx queues
 343  * @adapter: board private structure
 344  * @v_idx: interrupt number
 345  * @t_idx: queue number
 346  **/
 347 static void
 348 i40evf_map_vector_to_txq(struct i40evf_adapter *adapter, int v_idx, int t_idx)
 349 {
 350         struct i40e_q_vector *q_vector = &adapter->q_vectors[v_idx];
 351         struct i40e_ring *tx_ring = &adapter->tx_rings[t_idx];
 352         struct i40e_hw *hw = &adapter->hw;
 353
 354         tx_ring->q_vector = q_vector;
 355         tx_ring->next = q_vector->tx.ring;
 356         tx_ring->vsi = &adapter->vsi;
 357         q_vector->tx.ring = tx_ring;
 358         q_vector->tx.count++;
 359         q_vector->tx.next_update = jiffies + 1;
 360         q_vector->tx.target_itr = ITR_TO_REG(tx_ring->itr_setting);
 361         q_vector->num_ringpairs++;
 362         wr32(hw, I40E_VFINT_ITRN1(I40E_TX_ITR, q_vector->reg_idx),
 363              q_vector->tx.target_itr);
 364         q_vector->tx.current_itr = q_vector->tx.target_itr;
 365 }
 366
 367 /**
 368  * i40evf_map_rings_to_vectors - Maps descriptor rings to vectors
 369  * @adapter: board private structure to initialize
 370  *
 371  * This function maps descriptor rings to the queue-specific vectors
 372  * we were allotted through the MSI-X enabling code.  Ideally, we'd have
 373  * one vector per ring/queue, but on a constrained vector budget, we
 374  * group the rings as "efficiently" as possible.  You would add new
 375  * mapping configurations in here.
 376  **/
 377 static void i40evf_map_rings_to_vectors(struct i40evf_adapter *adapter)
 378 {
 379         int rings_remaining = adapter->num_active_queues;
 380         int ridx = 0, vidx = 0;
 381         int q_vectors;
 382
 383         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 384
 385         for (; ridx < rings_remaining; ridx++) {
 386                 i40evf_map_vector_to_rxq(adapter, vidx, ridx);
 387                 i40evf_map_vector_to_txq(adapter, vidx, ridx);
 388
 389                 /* In the case where we have more queues than vectors, continue
 390                  * round-robin on vectors until all queues are mapped.
 391                  */
 392                 if (++vidx >= q_vectors)
 393                         vidx = 0;
 394         }
 395
 396         adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
 397 }
 398
 399 /**
 400  * i40evf_irq_affinity_notify - Callback for affinity changes
 401  * @notify: context as to what irq was changed
 402  * @mask: the new affinity mask
 403  *
 404  * This is a callback function used by the irq_set_affinity_notifier function
 405  * so that we may register to receive changes to the irq affinity masks.
 406  **/
 407 static void i40evf_irq_affinity_notify(struct irq_affinity_notify *notify,
 408                                        const cpumask_t *mask)
 409 {
 410         struct i40e_q_vector *q_vector =
 411                 container_of(notify, struct i40e_q_vector, affinity_notify);
 412
 413         cpumask_copy(&q_vector->affinity_mask, mask);
 414 }
 415
 416 /**
 417  * i40evf_irq_affinity_release - Callback for affinity notifier release
 418  * @ref: internal core kernel usage
 419  *
 420  * This is a callback function used by the irq_set_affinity_notifier function
 421  * to inform the current notification subscriber that they will no longer
 422  * receive notifications.
 423  **/
 424 static void i40evf_irq_affinity_release(struct kref *ref) {}
 425
 426 /**
 427  * i40evf_request_traffic_irqs - Initialize MSI-X interrupts
 428  * @adapter: board private structure
 429  * @basename: device basename
 430  *
 431  * Allocates MSI-X vectors for tx and rx handling, and requests
 432  * interrupts from the kernel.
 433  **/
 434 static int
 435 i40evf_request_traffic_irqs(struct i40evf_adapter *adapter, char *basename)
 436 {
 437         unsigned int vector, q_vectors;
 438         unsigned int rx_int_idx = 0, tx_int_idx = 0;
 439         int irq_num, err;
 440         int cpu;
 441
 442         i40evf_irq_disable(adapter);
 443         /* Decrement for Other and TCP Timer vectors */
 444         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 445
 446         for (vector = 0; vector < q_vectors; vector++) {
 447                 struct i40e_q_vector *q_vector = &adapter->q_vectors[vector];
 448                 irq_num = adapter->msix_entries[vector + NONQ_VECS].vector;
 449
 450                 if (q_vector->tx.ring && q_vector->rx.ring) {
 451                         snprintf(q_vector->name, sizeof(q_vector->name),
 452                                  "i40evf-%s-TxRx-%d", basename, rx_int_idx++);
 453                         tx_int_idx++;
 454                 } else if (q_vector->rx.ring) {
 455                         snprintf(q_vector->name, sizeof(q_vector->name),
 456                                  "i40evf-%s-rx-%d", basename, rx_int_idx++);
 457                 } else if (q_vector->tx.ring) {
 458                         snprintf(q_vector->name, sizeof(q_vector->name),
 459                                  "i40evf-%s-tx-%d", basename, tx_int_idx++);
 460                 } else {
 461                         /* skip this unused q_vector */
 462                         continue;
 463                 }
 464                 err = request_irq(irq_num,
 465                                   i40evf_msix_clean_rings,
 466                                   0,
 467                                   q_vector->name,
 468                                   q_vector);
 469                 if (err) {
 470                         dev_info(&adapter->pdev->dev,
 471                                  "Request_irq failed, error: %d\n", err);
 472                         goto free_queue_irqs;
 473                 }
 474                 /* register for affinity change notifications */
 475                 q_vector->affinity_notify.notify = i40evf_irq_affinity_notify;
 476                 q_vector->affinity_notify.release =
 477                                                    i40evf_irq_affinity_release;
 478                 irq_set_affinity_notifier(irq_num, &q_vector->affinity_notify);
 479                 /* Spread the IRQ affinity hints across online CPUs. Note that
 480                  * get_cpu_mask returns a mask with a permanent lifetime so
 481                  * it's safe to use as a hint for irq_set_affinity_hint.
 482                  */
 483                 cpu = cpumask_local_spread(q_vector->v_idx, -1);
 484                 irq_set_affinity_hint(irq_num, get_cpu_mask(cpu));
 485         }
 486
 487         return 0;
 488
 489 free_queue_irqs:
 490         while (vector) {
 491                 vector--;
 492                 irq_num = adapter->msix_entries[vector + NONQ_VECS].vector;
 493                 irq_set_affinity_notifier(irq_num, NULL);
 494                 irq_set_affinity_hint(irq_num, NULL);
 495                 free_irq(irq_num, &adapter->q_vectors[vector]);
 496         }
 497         return err;
 498 }
 499
 500 /**
 501  * i40evf_request_misc_irq - Initialize MSI-X interrupts
 502  * @adapter: board private structure
 503  *
 504  * Allocates MSI-X vector 0 and requests interrupts from the kernel. This
 505  * vector is only for the admin queue, and stays active even when the netdev
 506  * is closed.
 507  **/
 508 static int i40evf_request_misc_irq(struct i40evf_adapter *adapter)
 509 {
 510         struct net_device *netdev = adapter->netdev;
 511         int err;
 512
 513         snprintf(adapter->misc_vector_name,
 514                  sizeof(adapter->misc_vector_name) - 1, "i40evf-%s:mbx",
 515                  dev_name(&adapter->pdev->dev));
 516         err = request_irq(adapter->msix_entries[0].vector,
 517                           &i40evf_msix_aq, 0,
 518                           adapter->misc_vector_name, netdev);
 519         if (err) {
 520                 dev_err(&adapter->pdev->dev,
 521                         "request_irq for %s failed: %d\n",
 522                         adapter->misc_vector_name, err);
 523                 free_irq(adapter->msix_entries[0].vector, netdev);
 524         }
 525         return err;
 526 }
 527
 528 /**
 529  * i40evf_free_traffic_irqs - Free MSI-X interrupts
 530  * @adapter: board private structure
 531  *
 532  * Frees all MSI-X vectors other than 0.
 533  **/
 534 static void i40evf_free_traffic_irqs(struct i40evf_adapter *adapter)
 535 {
 536         int vector, irq_num, q_vectors;
 537
 538         if (!adapter->msix_entries)
 539                 return;
 540
 541         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 542
 543         for (vector = 0; vector < q_vectors; vector++) {
 544                 irq_num = adapter->msix_entries[vector + NONQ_VECS].vector;
 545                 irq_set_affinity_notifier(irq_num, NULL);
 546                 irq_set_affinity_hint(irq_num, NULL);
 547                 free_irq(irq_num, &adapter->q_vectors[vector]);
 548         }
 549 }
 550
 551 /**
 552  * i40evf_free_misc_irq - Free MSI-X miscellaneous vector
 553  * @adapter: board private structure
 554  *
 555  * Frees MSI-X vector 0.
 556  **/
 557 static void i40evf_free_misc_irq(struct i40evf_adapter *adapter)
 558 {
 559         struct net_device *netdev = adapter->netdev;
 560
 561         if (!adapter->msix_entries)
 562                 return;
 563
 564         free_irq(adapter->msix_entries[0].vector, netdev);
 565 }
 566
 567 /**
 568  * i40evf_configure_tx - Configure Transmit Unit after Reset
 569  * @adapter: board private structure
 570  *
 571  * Configure the Tx unit of the MAC after a reset.
 572  **/
 573 static void i40evf_configure_tx(struct i40evf_adapter *adapter)
 574 {
 575         struct i40e_hw *hw = &adapter->hw;
 576         int i;
 577
 578         for (i = 0; i < adapter->num_active_queues; i++)
 579                 adapter->tx_rings[i].tail = hw->hw_addr + I40E_QTX_TAIL1(i);
 580 }
 581
 582 /**
 583  * i40evf_configure_rx - Configure Receive Unit after Reset
 584  * @adapter: board private structure
 585  *
 586  * Configure the Rx unit of the MAC after a reset.
 587  **/
 588 static void i40evf_configure_rx(struct i40evf_adapter *adapter)
 589 {
 590         unsigned int rx_buf_len = I40E_RXBUFFER_2048;
 591         struct i40e_hw *hw = &adapter->hw;
 592         int i;
 593
 594         /* Legacy Rx will always default to a 2048 buffer size. */
 595 #if (PAGE_SIZE < 8192)
 596         if (!(adapter->flags & I40EVF_FLAG_LEGACY_RX)) {
 597                 struct net_device *netdev = adapter->netdev;
 598
 599                 /* For jumbo frames on systems with 4K pages we have to use
 600                  * an order 1 page, so we might as well increase the size
 601                  * of our Rx buffer to make better use of the available space
 602                  */
 603                 rx_buf_len = I40E_RXBUFFER_3072;
 604
 605                 /* We use a 1536 buffer size for configurations with
 606                  * standard Ethernet mtu.  On x86 this gives us enough room
 607                  * for shared info and 192 bytes of padding.
 608                  */
 609                 if (!I40E_2K_TOO_SMALL_WITH_PADDING &&
 610                     (netdev->mtu <= ETH_DATA_LEN))
 611                         rx_buf_len = I40E_RXBUFFER_1536 - NET_IP_ALIGN;
 612         }
 613 #endif
 614
 615         for (i = 0; i < adapter->num_active_queues; i++) {
 616                 adapter->rx_rings[i].tail = hw->hw_addr + I40E_QRX_TAIL1(i);
 617                 adapter->rx_rings[i].rx_buf_len = rx_buf_len;
 618
 619                 if (adapter->flags & I40EVF_FLAG_LEGACY_RX)
 620                         clear_ring_build_skb_enabled(&adapter->rx_rings[i]);
 621                 else
 622                         set_ring_build_skb_enabled(&adapter->rx_rings[i]);
 623         }
 624 }
 625
 626 /**
 627  * i40evf_find_vlan - Search filter list for specific vlan filter
 628  * @adapter: board private structure
 629  * @vlan: vlan tag
 630  *
 631  * Returns ptr to the filter object or NULL. Must be called while holding the
 632  * mac_vlan_list_lock.
 633  **/
 634 static struct
 635 i40evf_vlan_filter *i40evf_find_vlan(struct i40evf_adapter *adapter, u16 vlan)
 636 {
 637         struct i40evf_vlan_filter *f;
 638
 639         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
 640                 if (vlan == f->vlan)
 641                         return f;
 642         }
 643         return NULL;
 644 }
 645
 646 /**
 647  * i40evf_add_vlan - Add a vlan filter to the list
 648  * @adapter: board private structure
 649  * @vlan: VLAN tag
 650  *
 651  * Returns ptr to the filter object or NULL when no memory available.
 652  **/
 653 static struct
 654 i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan)
 655 {
 656         struct i40evf_vlan_filter *f = NULL;
 657
 658         spin_lock_bh(&adapter->mac_vlan_list_lock);
 659
 660         f = i40evf_find_vlan(adapter, vlan);
 661         if (!f) {
 662                 f = kzalloc(sizeof(*f), GFP_KERNEL);
 663                 if (!f)
 664                         goto clearout;
 665
 666                 f->vlan = vlan;
 667
 668                 INIT_LIST_HEAD(&f->list);
 669                 list_add(&f->list, &adapter->vlan_filter_list);
 670                 f->add = true;
 671                 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
 672         }
 673
 674 clearout:
 675         spin_unlock_bh(&adapter->mac_vlan_list_lock);
 676         return f;
 677 }
 678
 679 /**
 680  * i40evf_del_vlan - Remove a vlan filter from the list
 681  * @adapter: board private structure
 682  * @vlan: VLAN tag
 683  **/
 684 static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan)
 685 {
 686         struct i40evf_vlan_filter *f;
 687
 688         spin_lock_bh(&adapter->mac_vlan_list_lock);
 689
 690         f = i40evf_find_vlan(adapter, vlan);
 691         if (f) {
 692                 f->remove = true;
 693                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
 694         }
 695
 696         spin_unlock_bh(&adapter->mac_vlan_list_lock);
 697 }
 698
 699 /**
 700  * i40evf_vlan_rx_add_vid - Add a VLAN filter to a device
 701  * @netdev: network device struct
 702  * @proto: unused protocol data
 703  * @vid: VLAN tag
 704  **/
 705 static int i40evf_vlan_rx_add_vid(struct net_device *netdev,
 706                                   __always_unused __be16 proto, u16 vid)
 707 {
 708         struct i40evf_adapter *adapter = netdev_priv(netdev);
 709
 710         if (!VLAN_ALLOWED(adapter))
 711                 return -EIO;
 712         if (i40evf_add_vlan(adapter, vid) == NULL)
 713                 return -ENOMEM;
 714         return 0;
 715 }
 716
 717 /**
 718  * i40evf_vlan_rx_kill_vid - Remove a VLAN filter from a device
 719  * @netdev: network device struct
 720  * @proto: unused protocol data
 721  * @vid: VLAN tag
 722  **/
 723 static int i40evf_vlan_rx_kill_vid(struct net_device *netdev,
 724                                    __always_unused __be16 proto, u16 vid)
 725 {
 726         struct i40evf_adapter *adapter = netdev_priv(netdev);
 727
 728         if (VLAN_ALLOWED(adapter)) {
 729                 i40evf_del_vlan(adapter, vid);
 730                 return 0;
 731         }
 732         return -EIO;
 733 }
 734
 735 /**
 736  * i40evf_find_filter - Search filter list for specific mac filter
 737  * @adapter: board private structure
 738  * @macaddr: the MAC address
 739  *
 740  * Returns ptr to the filter object or NULL. Must be called while holding the
 741  * mac_vlan_list_lock.
 742  **/
 743 static struct
 744 i40evf_mac_filter *i40evf_find_filter(struct i40evf_adapter *adapter,
 745                                       const u8 *macaddr)
 746 {
 747         struct i40evf_mac_filter *f;
 748
 749         if (!macaddr)
 750                 return NULL;
 751
 752         list_for_each_entry(f, &adapter->mac_filter_list, list) {
 753                 if (ether_addr_equal(macaddr, f->macaddr))
 754                         return f;
 755         }
 756         return NULL;
 757 }
 758
 759 /**
 760  * i40e_add_filter - Add a mac filter to the filter list
 761  * @adapter: board private structure
 762  * @macaddr: the MAC address
 763  *
 764  * Returns ptr to the filter object or NULL when no memory available.
 765  **/
 766 static struct
 767 i40evf_mac_filter *i40evf_add_filter(struct i40evf_adapter *adapter,
 768                                      const u8 *macaddr)
 769 {
 770         struct i40evf_mac_filter *f;
 771
 772         if (!macaddr)
 773                 return NULL;
 774
 775         f = i40evf_find_filter(adapter, macaddr);
 776         if (!f) {
 777                 f = kzalloc(sizeof(*f), GFP_ATOMIC);
 778                 if (!f)
 779                         return f;
 780
 781                 ether_addr_copy(f->macaddr, macaddr);
 782
 783                 list_add_tail(&f->list, &adapter->mac_filter_list);
 784                 f->add = true;
 785                 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
 786         } else {
 787                 f->remove = false;
 788         }
 789
 790         return f;
 791 }
 792
 793 /**
 794  * i40evf_set_mac - NDO callback to set port mac address
 795  * @netdev: network interface device structure
 796  * @p: pointer to an address structure
 797  *
 798  * Returns 0 on success, negative on failure
 799  **/
 800 static int i40evf_set_mac(struct net_device *netdev, void *p)
 801 {
 802         struct i40evf_adapter *adapter = netdev_priv(netdev);
 803         struct i40e_hw *hw = &adapter->hw;
 804         struct i40evf_mac_filter *f;
 805         struct sockaddr *addr = p;
 806
 807         if (!is_valid_ether_addr(addr->sa_data))
 808                 return -EADDRNOTAVAIL;
 809
 810         if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
 811                 return 0;
 812
 813         if (adapter->flags & I40EVF_FLAG_ADDR_SET_BY_PF)
 814                 return -EPERM;
 815
 816         spin_lock_bh(&adapter->mac_vlan_list_lock);
 817
 818         f = i40evf_find_filter(adapter, hw->mac.addr);
 819         if (f) {
 820                 f->remove = true;
 821                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
 822         }
 823
 824         f = i40evf_add_filter(adapter, addr->sa_data);
 825
 826         spin_unlock_bh(&adapter->mac_vlan_list_lock);
 827
 828         if (f) {
 829                 ether_addr_copy(hw->mac.addr, addr->sa_data);
 830                 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
 831         }
 832
 833         return (f == NULL) ? -ENOMEM : 0;
 834 }
 835
 836 /**
 837  * i40evf_addr_sync - Callback for dev_(mc|uc)_sync to add address
 838  * @netdev: the netdevice
 839  * @addr: address to add
 840  *
 841  * Called by __dev_(mc|uc)_sync when an address needs to be added. We call
 842  * __dev_(uc|mc)_sync from .set_rx_mode and guarantee to hold the hash lock.
 843  */
 844 static int i40evf_addr_sync(struct net_device *netdev, const u8 *addr)
 845 {
 846         struct i40evf_adapter *adapter = netdev_priv(netdev);
 847
 848         if (i40evf_add_filter(adapter, addr))
 849                 return 0;
 850         else
 851                 return -ENOMEM;
 852 }
 853
 854 /**
 855  * i40evf_addr_unsync - Callback for dev_(mc|uc)_sync to remove address
 856  * @netdev: the netdevice
 857  * @addr: address to add
 858  *
 859  * Called by __dev_(mc|uc)_sync when an address needs to be removed. We call
 860  * __dev_(uc|mc)_sync from .set_rx_mode and guarantee to hold the hash lock.
 861  */
 862 static int i40evf_addr_unsync(struct net_device *netdev, const u8 *addr)
 863 {
 864         struct i40evf_adapter *adapter = netdev_priv(netdev);
 865         struct i40evf_mac_filter *f;
 866
 867         /* Under some circumstances, we might receive a request to delete
 868          * our own device address from our uc list. Because we store the
 869          * device address in the VSI's MAC/VLAN filter list, we need to ignore
 870          * such requests and not delete our device address from this list.
 871          */
 872         if (ether_addr_equal(addr, netdev->dev_addr))
 873                 return 0;
 874
 875         f = i40evf_find_filter(adapter, addr);
 876         if (f) {
 877                 f->remove = true;
 878                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
 879         }
 880         return 0;
 881 }
 882
 883 /**
 884  * i40evf_set_rx_mode - NDO callback to set the netdev filters
 885  * @netdev: network interface device structure
 886  **/
 887 static void i40evf_set_rx_mode(struct net_device *netdev)
 888 {
 889         struct i40evf_adapter *adapter = netdev_priv(netdev);
 890
 891         spin_lock_bh(&adapter->mac_vlan_list_lock);
 892         __dev_uc_sync(netdev, i40evf_addr_sync, i40evf_addr_unsync);
 893         __dev_mc_sync(netdev, i40evf_addr_sync, i40evf_addr_unsync);
 894         spin_unlock_bh(&adapter->mac_vlan_list_lock);
 895
 896         if (netdev->flags & IFF_PROMISC &&
 897             !(adapter->flags & I40EVF_FLAG_PROMISC_ON))
 898                 adapter->aq_required |= I40EVF_FLAG_AQ_REQUEST_PROMISC;
 899         else if (!(netdev->flags & IFF_PROMISC) &&
 900                  adapter->flags & I40EVF_FLAG_PROMISC_ON)
 901                 adapter->aq_required |= I40EVF_FLAG_AQ_RELEASE_PROMISC;
 902
 903         if (netdev->flags & IFF_ALLMULTI &&
 904             !(adapter->flags & I40EVF_FLAG_ALLMULTI_ON))
 905                 adapter->aq_required |= I40EVF_FLAG_AQ_REQUEST_ALLMULTI;
 906         else if (!(netdev->flags & IFF_ALLMULTI) &&
 907                  adapter->flags & I40EVF_FLAG_ALLMULTI_ON)
 908                 adapter->aq_required |= I40EVF_FLAG_AQ_RELEASE_ALLMULTI;
 909 }
 910
 911 /**
 912  * i40evf_napi_enable_all - enable NAPI on all queue vectors
 913  * @adapter: board private structure
 914  **/
 915 static void i40evf_napi_enable_all(struct i40evf_adapter *adapter)
 916 {
 917         int q_idx;
 918         struct i40e_q_vector *q_vector;
 919         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 920
 921         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
 922                 struct napi_struct *napi;
 923
 924                 q_vector = &adapter->q_vectors[q_idx];
 925                 napi = &q_vector->napi;
 926                 napi_enable(napi);
 927         }
 928 }
 929
 930 /**
 931  * i40evf_napi_disable_all - disable NAPI on all queue vectors
 932  * @adapter: board private structure
 933  **/
 934 static void i40evf_napi_disable_all(struct i40evf_adapter *adapter)
 935 {
 936         int q_idx;
 937         struct i40e_q_vector *q_vector;
 938         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 939
 940         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
 941                 q_vector = &adapter->q_vectors[q_idx];
 942                 napi_disable(&q_vector->napi);
 943         }
 944 }
 945
 946 /**
 947  * i40evf_configure - set up transmit and receive data structures
 948  * @adapter: board private structure
 949  **/
 950 static void i40evf_configure(struct i40evf_adapter *adapter)
 951 {
 952         struct net_device *netdev = adapter->netdev;
 953         int i;
 954
 955         i40evf_set_rx_mode(netdev);
 956
 957         i40evf_configure_tx(adapter);
 958         i40evf_configure_rx(adapter);
 959         adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
 960
 961         for (i = 0; i < adapter->num_active_queues; i++) {
 962                 struct i40e_ring *ring = &adapter->rx_rings[i];
 963
 964                 i40evf_alloc_rx_buffers(ring, I40E_DESC_UNUSED(ring));
 965         }
 966 }
 967
 968 /**
 969  * i40evf_up_complete - Finish the last steps of bringing up a connection
 970  * @adapter: board private structure
 971  *
 972  * Expects to be called while holding the __I40EVF_IN_CRITICAL_TASK bit lock.
 973  **/
 974 static void i40evf_up_complete(struct i40evf_adapter *adapter)
 975 {
 976         adapter->state = __I40EVF_RUNNING;
 977         clear_bit(__I40E_VSI_DOWN, adapter->vsi.state);
 978
 979         i40evf_napi_enable_all(adapter);
 980
 981         adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES;
 982         if (CLIENT_ENABLED(adapter))
 983                 adapter->flags |= I40EVF_FLAG_CLIENT_NEEDS_OPEN;
 984         mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
 985 }
 986
 987 /**
 988  * i40e_down - Shutdown the connection processing
 989  * @adapter: board private structure
 990  *
 991  * Expects to be called while holding the __I40EVF_IN_CRITICAL_TASK bit lock.
 992  **/
 993 void i40evf_down(struct i40evf_adapter *adapter)
 994 {
 995         struct net_device *netdev = adapter->netdev;
 996         struct i40evf_vlan_filter *vlf;
 997         struct i40evf_mac_filter *f;
 998         struct i40evf_cloud_filter *cf;
 999
1000         if (adapter->state <= __I40EVF_DOWN_PENDING)
1001                 return;
1002
1003         netif_carrier_off(netdev);
1004         netif_tx_disable(netdev);
1005         adapter->link_up = false;
1006         i40evf_napi_disable_all(adapter);
1007         i40evf_irq_disable(adapter);
1008
1009         spin_lock_bh(&adapter->mac_vlan_list_lock);
1010
1011         /* clear the sync flag on all filters */
1012         __dev_uc_unsync(adapter->netdev, NULL);
1013         __dev_mc_unsync(adapter->netdev, NULL);
1014
1015         /* remove all MAC filters */
1016         list_for_each_entry(f, &adapter->mac_filter_list, list) {
1017                 f->remove = true;
1018         }
1019
1020         /* remove all VLAN filters */
1021         list_for_each_entry(vlf, &adapter->vlan_filter_list, list) {
1022                 vlf->remove = true;
1023         }
1024
1025         spin_unlock_bh(&adapter->mac_vlan_list_lock);
1026
1027         /* remove all cloud filters */
1028         spin_lock_bh(&adapter->cloud_filter_list_lock);
1029         list_for_each_entry(cf, &adapter->cloud_filter_list, list) {
1030                 cf->del = true;
1031         }
1032         spin_unlock_bh(&adapter->cloud_filter_list_lock);
1033
1034         if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) &&
1035             adapter->state != __I40EVF_RESETTING) {
1036                 /* cancel any current operation */
1037                 adapter->current_op = VIRTCHNL_OP_UNKNOWN;
1038                 /* Schedule operations to close down the HW. Don't wait
1039                  * here for this to complete. The watchdog is still running
1040                  * and it will take care of this.
1041                  */
1042                 adapter->aq_required = I40EVF_FLAG_AQ_DEL_MAC_FILTER;
1043                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
1044                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_CLOUD_FILTER;
1045                 adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
1046         }
1047
1048         mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
1049 }
1050
1051 /**
1052  * i40evf_acquire_msix_vectors - Setup the MSIX capability
1053  * @adapter: board private structure
1054  * @vectors: number of vectors to request
1055  *
1056  * Work with the OS to set up the MSIX vectors needed.
1057  *
1058  * Returns 0 on success, negative on failure
1059  **/
1060 static int
1061 i40evf_acquire_msix_vectors(struct i40evf_adapter *adapter, int vectors)
1062 {
1063         int err, vector_threshold;
1064
1065         /* We'll want at least 3 (vector_threshold):
1066          * 0) Other (Admin Queue and link, mostly)
1067          * 1) TxQ[0] Cleanup
1068          * 2) RxQ[0] Cleanup
1069          */
1070         vector_threshold = MIN_MSIX_COUNT;
1071
1072         /* The more we get, the more we will assign to Tx/Rx Cleanup
1073          * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1074          * Right now, we simply care about how many we'll get; we'll
1075          * set them up later while requesting irq's.
1076          */
1077         err = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
1078                                     vector_threshold, vectors);
1079         if (err < 0) {
1080                 dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts\n");
1081                 kfree(adapter->msix_entries);
1082                 adapter->msix_entries = NULL;
1083                 return err;
1084         }
1085
1086         /* Adjust for only the vectors we'll use, which is minimum
1087          * of max_msix_q_vectors + NONQ_VECS, or the number of
1088          * vectors we were allocated.
1089          */
1090         adapter->num_msix_vectors = err;
1091         return 0;
1092 }
1093
1094 /**
1095  * i40evf_free_queues - Free memory for all rings
1096  * @adapter: board private structure to initialize
1097  *
1098  * Free all of the memory associated with queue pairs.
1099  **/
1100 static void i40evf_free_queues(struct i40evf_adapter *adapter)
1101 {
1102         if (!adapter->vsi_res)
1103                 return;
1104         adapter->num_active_queues = 0;
1105         kfree(adapter->tx_rings);
1106         adapter->tx_rings = NULL;
1107         kfree(adapter->rx_rings);
1108         adapter->rx_rings = NULL;
1109 }
1110
1111 /**
1112  * i40evf_alloc_queues - Allocate memory for all rings
1113  * @adapter: board private structure to initialize
1114  *
1115  * We allocate one ring per queue at run-time since we don't know the
1116  * number of queues at compile-time.  The polling_netdev array is
1117  * intended for Multiqueue, but should work fine with a single queue.
1118  **/
1119 static int i40evf_alloc_queues(struct i40evf_adapter *adapter)
1120 {
1121         int i, num_active_queues;
1122
1123         /* If we're in reset reallocating queues we don't actually know yet for
1124          * certain the PF gave us the number of queues we asked for but we'll
1125          * assume it did.  Once basic reset is finished we'll confirm once we
1126          * start negotiating config with PF.
1127          */
1128         if (adapter->num_req_queues)
1129                 num_active_queues = adapter->num_req_queues;
1130         else if ((adapter->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_ADQ) &&
1131                  adapter->num_tc)
1132                 num_active_queues = adapter->ch_config.total_qps;
1133         else
1134                 num_active_queues = min_t(int,
1135                                           adapter->vsi_res->num_queue_pairs,
1136                                           (int)(num_online_cpus()));
1137
1138
1139         adapter->tx_rings = kcalloc(num_active_queues,
1140                                     sizeof(struct i40e_ring), GFP_KERNEL);
1141         if (!adapter->tx_rings)
1142                 goto err_out;
1143         adapter->rx_rings = kcalloc(num_active_queues,
1144                                     sizeof(struct i40e_ring), GFP_KERNEL);
1145         if (!adapter->rx_rings)
1146                 goto err_out;
1147
1148         for (i = 0; i < num_active_queues; i++) {
1149                 struct i40e_ring *tx_ring;
1150                 struct i40e_ring *rx_ring;
1151
1152                 tx_ring = &adapter->tx_rings[i];
1153
1154                 tx_ring->queue_index = i;
1155                 tx_ring->netdev = adapter->netdev;
1156                 tx_ring->dev = &adapter->pdev->dev;
1157                 tx_ring->count = adapter->tx_desc_count;
1158                 tx_ring->itr_setting = I40E_ITR_TX_DEF;
1159                 if (adapter->flags & I40EVF_FLAG_WB_ON_ITR_CAPABLE)
1160                         tx_ring->flags |= I40E_TXR_FLAGS_WB_ON_ITR;
1161
1162                 rx_ring = &adapter->rx_rings[i];
1163                 rx_ring->queue_index = i;
1164                 rx_ring->netdev = adapter->netdev;
1165                 rx_ring->dev = &adapter->pdev->dev;
1166                 rx_ring->count = adapter->rx_desc_count;
1167                 rx_ring->itr_setting = I40E_ITR_RX_DEF;
1168         }
1169
1170         adapter->num_active_queues = num_active_queues;
1171
1172         return 0;
1173
1174 err_out:
1175         i40evf_free_queues(adapter);
1176         return -ENOMEM;
1177 }
1178
1179 /**
1180  * i40evf_set_interrupt_capability - set MSI-X or FAIL if not supported
1181  * @adapter: board private structure to initialize
1182  *
1183  * Attempt to configure the interrupts using the best available
1184  * capabilities of the hardware and the kernel.
1185  **/
1186 static int i40evf_set_interrupt_capability(struct i40evf_adapter *adapter)
1187 {
1188         int vector, v_budget;
1189         int pairs = 0;
1190         int err = 0;
1191
1192         if (!adapter->vsi_res) {
1193                 err = -EIO;
1194                 goto out;
1195         }
1196         pairs = adapter->num_active_queues;
1197
1198         /* It's easy to be greedy for MSI-X vectors, but it really doesn't do
1199          * us much good if we have more vectors than CPUs. However, we already
1200          * limit the total number of queues by the number of CPUs so we do not
1201          * need any further limiting here.
1202          */
1203         v_budget = min_t(int, pairs + NONQ_VECS,
1204                          (int)adapter->vf_res->max_vectors);
1205
1206         adapter->msix_entries = kcalloc(v_budget,
1207                                         sizeof(struct msix_entry), GFP_KERNEL);
1208         if (!adapter->msix_entries) {
1209                 err = -ENOMEM;
1210                 goto out;
1211         }
1212
1213         for (vector = 0; vector < v_budget; vector++)
1214                 adapter->msix_entries[vector].entry = vector;
1215
1216         err = i40evf_acquire_msix_vectors(adapter, v_budget);
1217
1218 out:
1219         netif_set_real_num_rx_queues(adapter->netdev, pairs);
1220         netif_set_real_num_tx_queues(adapter->netdev, pairs);
1221         return err;
1222 }
1223
1224 /**
1225  * i40e_config_rss_aq - Configure RSS keys and lut by using AQ commands
1226  * @adapter: board private structure
1227  *
1228  * Return 0 on success, negative on failure
1229  **/
1230 static int i40evf_config_rss_aq(struct i40evf_adapter *adapter)
1231 {
1232         struct i40e_aqc_get_set_rss_key_data *rss_key =
1233                 (struct i40e_aqc_get_set_rss_key_data *)adapter->rss_key;
1234         struct i40e_hw *hw = &adapter->hw;
1235         int ret = 0;
1236
1237         if (adapter->current_op != VIRTCHNL_OP_UNKNOWN) {
1238                 /* bail because we already have a command pending */
1239                 dev_err(&adapter->pdev->dev, "Cannot configure RSS, command %d pending\n",
1240                         adapter->current_op);
1241                 return -EBUSY;
1242         }
1243
1244         ret = i40evf_aq_set_rss_key(hw, adapter->vsi.id, rss_key);
1245         if (ret) {
1246                 dev_err(&adapter->pdev->dev, "Cannot set RSS key, err %s aq_err %s\n",
1247                         i40evf_stat_str(hw, ret),
1248                         i40evf_aq_str(hw, hw->aq.asq_last_status));
1249                 return ret;
1250
1251         }
1252
1253         ret = i40evf_aq_set_rss_lut(hw, adapter->vsi.id, false,
1254                                     adapter->rss_lut, adapter->rss_lut_size);
1255         if (ret) {
1256                 dev_err(&adapter->pdev->dev, "Cannot set RSS lut, err %s aq_err %s\n",
1257                         i40evf_stat_str(hw, ret),
1258                         i40evf_aq_str(hw, hw->aq.asq_last_status));
1259         }
1260
1261         return ret;
1262
1263 }
1264
1265 /**
1266  * i40evf_config_rss_reg - Configure RSS keys and lut by writing registers
1267  * @adapter: board private structure
1268  *
1269  * Returns 0 on success, negative on failure
1270  **/
1271 static int i40evf_config_rss_reg(struct i40evf_adapter *adapter)
1272 {
1273         struct i40e_hw *hw = &adapter->hw;
1274         u32 *dw;
1275         u16 i;
1276
1277         dw = (u32 *)adapter->rss_key;
1278         for (i = 0; i <= adapter->rss_key_size / 4; i++)
1279                 wr32(hw, I40E_VFQF_HKEY(i), dw[i]);
1280
1281         dw = (u32 *)adapter->rss_lut;
1282         for (i = 0; i <= adapter->rss_lut_size / 4; i++)
1283                 wr32(hw, I40E_VFQF_HLUT(i), dw[i]);
1284
1285         i40e_flush(hw);
1286
1287         return 0;
1288 }
1289
1290 /**
1291  * i40evf_config_rss - Configure RSS keys and lut
1292  * @adapter: board private structure
1293  *
1294  * Returns 0 on success, negative on failure
1295  **/
1296 int i40evf_config_rss(struct i40evf_adapter *adapter)
1297 {
1298
1299         if (RSS_PF(adapter)) {
1300                 adapter->aq_required |= I40EVF_FLAG_AQ_SET_RSS_LUT |
1301                                         I40EVF_FLAG_AQ_SET_RSS_KEY;
1302                 return 0;
1303         } else if (RSS_AQ(adapter)) {
1304                 return i40evf_config_rss_aq(adapter);
1305         } else {
1306                 return i40evf_config_rss_reg(adapter);
1307         }
1308 }
1309
1310 /**
1311  * i40evf_fill_rss_lut - Fill the lut with default values
1312  * @adapter: board private structure
1313  **/
1314 static void i40evf_fill_rss_lut(struct i40evf_adapter *adapter)
1315 {
1316         u16 i;
1317
1318         for (i = 0; i < adapter->rss_lut_size; i++)
1319                 adapter->rss_lut[i] = i % adapter->num_active_queues;
1320 }
1321
1322 /**
1323  * i40evf_init_rss - Prepare for RSS
1324  * @adapter: board private structure
1325  *
1326  * Return 0 on success, negative on failure
1327  **/
1328 static int i40evf_init_rss(struct i40evf_adapter *adapter)
1329 {
1330         struct i40e_hw *hw = &adapter->hw;
1331         int ret;
1332
1333         if (!RSS_PF(adapter)) {
1334                 /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
1335                 if (adapter->vf_res->vf_cap_flags &
1336                     VIRTCHNL_VF_OFFLOAD_RSS_PCTYPE_V2)
1337                         adapter->hena = I40E_DEFAULT_RSS_HENA_EXPANDED;
1338                 else
1339                         adapter->hena = I40E_DEFAULT_RSS_HENA;
1340
1341                 wr32(hw, I40E_VFQF_HENA(0), (u32)adapter->hena);
1342                 wr32(hw, I40E_VFQF_HENA(1), (u32)(adapter->hena >> 32));
1343         }
1344
1345         i40evf_fill_rss_lut(adapter);
1346
1347         netdev_rss_key_fill((void *)adapter->rss_key, adapter->rss_key_size);
1348         ret = i40evf_config_rss(adapter);
1349
1350         return ret;
1351 }
1352
1353 /**
1354  * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors
1355  * @adapter: board private structure to initialize
1356  *
1357  * We allocate one q_vector per queue interrupt.  If allocation fails we
1358  * return -ENOMEM.
1359  **/
1360 static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
1361 {
1362         int q_idx = 0, num_q_vectors;
1363         struct i40e_q_vector *q_vector;
1364
1365         num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1366         adapter->q_vectors = kcalloc(num_q_vectors, sizeof(*q_vector),
1367                                      GFP_KERNEL);
1368         if (!adapter->q_vectors)
1369                 return -ENOMEM;
1370
1371         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1372                 q_vector = &adapter->q_vectors[q_idx];
1373                 q_vector->adapter = adapter;
1374                 q_vector->vsi = &adapter->vsi;
1375                 q_vector->v_idx = q_idx;
1376                 q_vector->reg_idx = q_idx;
1377                 cpumask_copy(&q_vector->affinity_mask, cpu_possible_mask);
1378                 netif_napi_add(adapter->netdev, &q_vector->napi,
1379                                i40evf_napi_poll, NAPI_POLL_WEIGHT);
1380         }
1381
1382         return 0;
1383 }
1384
1385 /**
1386  * i40evf_free_q_vectors - Free memory allocated for interrupt vectors
1387  * @adapter: board private structure to initialize
1388  *
1389  * This function frees the memory allocated to the q_vectors.  In addition if
1390  * NAPI is enabled it will delete any references to the NAPI struct prior
1391  * to freeing the q_vector.
1392  **/
1393 static void i40evf_free_q_vectors(struct i40evf_adapter *adapter)
1394 {
1395         int q_idx, num_q_vectors;
1396         int napi_vectors;
1397
1398         if (!adapter->q_vectors)
1399                 return;
1400
1401         num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1402         napi_vectors = adapter->num_active_queues;
1403
1404         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1405                 struct i40e_q_vector *q_vector = &adapter->q_vectors[q_idx];
1406                 if (q_idx < napi_vectors)
1407                         netif_napi_del(&q_vector->napi);
1408         }
1409         kfree(adapter->q_vectors);
1410         adapter->q_vectors = NULL;
1411 }
1412
1413 /**
1414  * i40evf_reset_interrupt_capability - Reset MSIX setup
1415  * @adapter: board private structure
1416  *
1417  **/
1418 void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
1419 {
1420         if (!adapter->msix_entries)
1421                 return;
1422
1423         pci_disable_msix(adapter->pdev);
1424         kfree(adapter->msix_entries);
1425         adapter->msix_entries = NULL;
1426 }
1427
1428 /**
1429  * i40evf_init_interrupt_scheme - Determine if MSIX is supported and init
1430  * @adapter: board private structure to initialize
1431  *
1432  **/
1433 int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter)
1434 {
1435         int err;
1436
1437         err = i40evf_alloc_queues(adapter);
1438         if (err) {
1439                 dev_err(&adapter->pdev->dev,
1440                         "Unable to allocate memory for queues\n");
1441                 goto err_alloc_queues;
1442         }
1443
1444         rtnl_lock();
1445         err = i40evf_set_interrupt_capability(adapter);
1446         rtnl_unlock();
1447         if (err) {
1448                 dev_err(&adapter->pdev->dev,
1449                         "Unable to setup interrupt capabilities\n");
1450                 goto err_set_interrupt;
1451         }
1452
1453         err = i40evf_alloc_q_vectors(adapter);
1454         if (err) {
1455                 dev_err(&adapter->pdev->dev,
1456                         "Unable to allocate memory for queue vectors\n");
1457                 goto err_alloc_q_vectors;
1458         }
1459
1460         /* If we've made it so far while ADq flag being ON, then we haven't
1461          * bailed out anywhere in middle. And ADq isn't just enabled but actual
1462          * resources have been allocated in the reset path.
1463          * Now we can truly claim that ADq is enabled.
1464          */
1465         if ((adapter->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_ADQ) &&
1466             adapter->num_tc)
1467                 dev_info(&adapter->pdev->dev, "ADq Enabled, %u TCs created",
1468                          adapter->num_tc);
1469
1470         dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
1471                  (adapter->num_active_queues > 1) ? "Enabled" : "Disabled",
1472                  adapter->num_active_queues);
1473
1474         return 0;
1475 err_alloc_q_vectors:
1476         i40evf_reset_interrupt_capability(adapter);
1477 err_set_interrupt:
1478         i40evf_free_queues(adapter);
1479 err_alloc_queues:
1480         return err;
1481 }
1482
1483 /**
1484  * i40evf_free_rss - Free memory used by RSS structs
1485  * @adapter: board private structure
1486  **/
1487 static void i40evf_free_rss(struct i40evf_adapter *adapter)
1488 {
1489         kfree(adapter->rss_key);
1490         adapter->rss_key = NULL;
1491
1492         kfree(adapter->rss_lut);
1493         adapter->rss_lut = NULL;
1494 }
1495
1496 /**
1497  * i40evf_reinit_interrupt_scheme - Reallocate queues and vectors
1498  * @adapter: board private structure
1499  *
1500  * Returns 0 on success, negative on failure
1501  **/
1502 static int i40evf_reinit_interrupt_scheme(struct i40evf_adapter *adapter)
1503 {
1504         struct net_device *netdev = adapter->netdev;
1505         int err;
1506
1507         if (netif_running(netdev))
1508                 i40evf_free_traffic_irqs(adapter);
1509         i40evf_free_misc_irq(adapter);
1510         i40evf_reset_interrupt_capability(adapter);
1511         i40evf_free_q_vectors(adapter);
1512         i40evf_free_queues(adapter);
1513
1514         err =  i40evf_init_interrupt_scheme(adapter);
1515         if (err)
1516                 goto err;
1517
1518         netif_tx_stop_all_queues(netdev);
1519
1520         err = i40evf_request_misc_irq(adapter);
1521         if (err)
1522                 goto err;
1523
1524         set_bit(__I40E_VSI_DOWN, adapter->vsi.state);
1525
1526         i40evf_map_rings_to_vectors(adapter);
1527
1528         if (RSS_AQ(adapter))
1529                 adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_RSS;
1530         else
1531                 err = i40evf_init_rss(adapter);
1532 err:
1533         return err;
1534 }
1535
1536 /**
1537  * i40evf_watchdog_timer - Periodic call-back timer
1538  * @data: pointer to adapter disguised as unsigned long
1539  **/
1540 static void i40evf_watchdog_timer(struct timer_list *t)
1541 {
1542         struct i40evf_adapter *adapter = from_timer(adapter, t,
1543                                                     watchdog_timer);
1544
1545         schedule_work(&adapter->watchdog_task);
1546         /* timer will be rescheduled in watchdog task */
1547 }
1548
1549 /**
1550  * i40evf_watchdog_task - Periodic call-back task
1551  * @work: pointer to work_struct
1552  **/
1553 static void i40evf_watchdog_task(struct work_struct *work)
1554 {
1555         struct i40evf_adapter *adapter = container_of(work,
1556                                                       struct i40evf_adapter,
1557                                                       watchdog_task);
1558         struct i40e_hw *hw = &adapter->hw;
1559         u32 reg_val;
1560
1561         if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
1562                 goto restart_watchdog;
1563
1564         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1565                 reg_val = rd32(hw, I40E_VFGEN_RSTAT) &
1566                           I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1567                 if ((reg_val == VIRTCHNL_VFR_VFACTIVE) ||
1568                     (reg_val == VIRTCHNL_VFR_COMPLETED)) {
1569                         /* A chance for redemption! */
1570                         dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
1571                         adapter->state = __I40EVF_STARTUP;
1572                         adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1573                         schedule_delayed_work(&adapter->init_task, 10);
1574                         clear_bit(__I40EVF_IN_CRITICAL_TASK,
1575                                   &adapter->crit_section);
1576                         /* Don't reschedule the watchdog, since we've restarted
1577                          * the init task. When init_task contacts the PF and
1578                          * gets everything set up again, it'll restart the
1579                          * watchdog for us. Down, boy. Sit. Stay. Woof.
1580                          */
1581                         return;
1582                 }
1583                 adapter->aq_required = 0;
1584                 adapter->current_op = VIRTCHNL_OP_UNKNOWN;
1585                 goto watchdog_done;
1586         }
1587
1588         if ((adapter->state < __I40EVF_DOWN) ||
1589             (adapter->flags & I40EVF_FLAG_RESET_PENDING))
1590                 goto watchdog_done;
1591
1592         /* check for reset */
1593         reg_val = rd32(hw, I40E_VF_ARQLEN1) & I40E_VF_ARQLEN1_ARQENABLE_MASK;
1594         if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) && !reg_val) {
1595                 adapter->state = __I40EVF_RESETTING;
1596                 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1597                 dev_err(&adapter->pdev->dev, "Hardware reset detected\n");
1598                 schedule_work(&adapter->reset_task);
1599                 adapter->aq_required = 0;
1600                 adapter->current_op = VIRTCHNL_OP_UNKNOWN;
1601                 goto watchdog_done;
1602         }
1603
1604         /* Process admin queue tasks. After init, everything gets done
1605          * here so we don't race on the admin queue.
1606          */
1607         if (adapter->current_op) {
1608                 if (!i40evf_asq_done(hw)) {
1609                         dev_dbg(&adapter->pdev->dev, "Admin queue timeout\n");
1610                         i40evf_send_api_ver(adapter);
1611                 }
1612                 goto watchdog_done;
1613         }
1614         if (adapter->aq_required & I40EVF_FLAG_AQ_GET_CONFIG) {
1615                 i40evf_send_vf_config_msg(adapter);
1616                 goto watchdog_done;
1617         }
1618
1619         if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
1620                 i40evf_disable_queues(adapter);
1621                 goto watchdog_done;
1622         }
1623
1624         if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
1625                 i40evf_map_queues(adapter);
1626                 goto watchdog_done;
1627         }
1628
1629         if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
1630                 i40evf_add_ether_addrs(adapter);
1631                 goto watchdog_done;
1632         }
1633
1634         if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
1635                 i40evf_add_vlans(adapter);
1636                 goto watchdog_done;
1637         }
1638
1639         if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
1640                 i40evf_del_ether_addrs(adapter);
1641                 goto watchdog_done;
1642         }
1643
1644         if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
1645                 i40evf_del_vlans(adapter);
1646                 goto watchdog_done;
1647         }
1648
1649         if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_VLAN_STRIPPING) {
1650                 i40evf_enable_vlan_stripping(adapter);
1651                 goto watchdog_done;
1652         }
1653
1654         if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_VLAN_STRIPPING) {
1655                 i40evf_disable_vlan_stripping(adapter);
1656                 goto watchdog_done;
1657         }
1658
1659         if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
1660                 i40evf_configure_queues(adapter);
1661                 goto watchdog_done;
1662         }
1663
1664         if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
1665                 i40evf_enable_queues(adapter);
1666                 goto watchdog_done;
1667         }
1668
1669         if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_RSS) {
1670                 /* This message goes straight to the firmware, not the
1671                  * PF, so we don't have to set current_op as we will
1672                  * not get a response through the ARQ.
1673                  */
1674                 i40evf_init_rss(adapter);
1675                 adapter->aq_required &= ~I40EVF_FLAG_AQ_CONFIGURE_RSS;
1676                 goto watchdog_done;
1677         }
1678         if (adapter->aq_required & I40EVF_FLAG_AQ_GET_HENA) {
1679                 i40evf_get_hena(adapter);
1680                 goto watchdog_done;
1681         }
1682         if (adapter->aq_required & I40EVF_FLAG_AQ_SET_HENA) {
1683                 i40evf_set_hena(adapter);
1684                 goto watchdog_done;
1685         }
1686         if (adapter->aq_required & I40EVF_FLAG_AQ_SET_RSS_KEY) {
1687                 i40evf_set_rss_key(adapter);
1688                 goto watchdog_done;
1689         }
1690         if (adapter->aq_required & I40EVF_FLAG_AQ_SET_RSS_LUT) {
1691                 i40evf_set_rss_lut(adapter);
1692                 goto watchdog_done;
1693         }
1694
1695         if (adapter->aq_required & I40EVF_FLAG_AQ_REQUEST_PROMISC) {
1696                 i40evf_set_promiscuous(adapter, FLAG_VF_UNICAST_PROMISC |
1697                                        FLAG_VF_MULTICAST_PROMISC);
1698                 goto watchdog_done;
1699         }
1700
1701         if (adapter->aq_required & I40EVF_FLAG_AQ_REQUEST_ALLMULTI) {
1702                 i40evf_set_promiscuous(adapter, FLAG_VF_MULTICAST_PROMISC);
1703                 goto watchdog_done;
1704         }
1705
1706         if ((adapter->aq_required & I40EVF_FLAG_AQ_RELEASE_PROMISC) &&
1707             (adapter->aq_required & I40EVF_FLAG_AQ_RELEASE_ALLMULTI)) {
1708                 i40evf_set_promiscuous(adapter, 0);
1709                 goto watchdog_done;
1710         }
1711
1712         if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_CHANNELS) {
1713                 i40evf_enable_channels(adapter);
1714                 goto watchdog_done;
1715         }
1716
1717         if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_CHANNELS) {
1718                 i40evf_disable_channels(adapter);
1719                 goto watchdog_done;
1720         }
1721
1722         if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_CLOUD_FILTER) {
1723                 i40evf_add_cloud_filter(adapter);
1724                 goto watchdog_done;
1725         }
1726
1727         if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_CLOUD_FILTER) {
1728                 i40evf_del_cloud_filter(adapter);
1729                 goto watchdog_done;
1730         }
1731
1732         schedule_delayed_work(&adapter->client_task, msecs_to_jiffies(5));
1733
1734         if (adapter->state == __I40EVF_RUNNING)
1735                 i40evf_request_stats(adapter);
1736 watchdog_done:
1737         if (adapter->state == __I40EVF_RUNNING)
1738                 i40evf_detect_recover_hung(&adapter->vsi);
1739         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1740 restart_watchdog:
1741         if (adapter->state == __I40EVF_REMOVE)
1742                 return;
1743         if (adapter->aq_required)
1744                 mod_timer(&adapter->watchdog_timer,
1745                           jiffies + msecs_to_jiffies(20));
1746         else
1747                 mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
1748         schedule_work(&adapter->adminq_task);
1749 }
1750
1751 static void i40evf_disable_vf(struct i40evf_adapter *adapter)
1752 {
1753         struct i40evf_mac_filter *f, *ftmp;
1754         struct i40evf_vlan_filter *fv, *fvtmp;
1755         struct i40evf_cloud_filter *cf, *cftmp;
1756
1757         adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
1758
1759         /* We don't use netif_running() because it may be true prior to
1760          * ndo_open() returning, so we can't assume it means all our open
1761          * tasks have finished, since we're not holding the rtnl_lock here.
1762          */
1763         if (adapter->state == __I40EVF_RUNNING) {
1764                 set_bit(__I40E_VSI_DOWN, adapter->vsi.state);
1765                 netif_carrier_off(adapter->netdev);
1766                 netif_tx_disable(adapter->netdev);
1767                 adapter->link_up = false;
1768                 i40evf_napi_disable_all(adapter);
1769                 i40evf_irq_disable(adapter);
1770                 i40evf_free_traffic_irqs(adapter);
1771                 i40evf_free_all_tx_resources(adapter);
1772                 i40evf_free_all_rx_resources(adapter);
1773         }
1774
1775         spin_lock_bh(&adapter->mac_vlan_list_lock);
1776
1777         /* Delete all of the filters */
1778         list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
1779                 list_del(&f->list);
1780                 kfree(f);
1781         }
1782
1783         list_for_each_entry_safe(fv, fvtmp, &adapter->vlan_filter_list, list) {
1784                 list_del(&fv->list);
1785                 kfree(fv);
1786         }
1787
1788         spin_unlock_bh(&adapter->mac_vlan_list_lock);
1789
1790         spin_lock_bh(&adapter->cloud_filter_list_lock);
1791         list_for_each_entry_safe(cf, cftmp, &adapter->cloud_filter_list, list) {
1792                 list_del(&cf->list);
1793                 kfree(cf);
1794                 adapter->num_cloud_filters--;
1795         }
1796         spin_unlock_bh(&adapter->cloud_filter_list_lock);
1797
1798         i40evf_free_misc_irq(adapter);
1799         i40evf_reset_interrupt_capability(adapter);
1800         i40evf_free_queues(adapter);
1801         i40evf_free_q_vectors(adapter);
1802         kfree(adapter->vf_res);
1803         i40evf_shutdown_adminq(&adapter->hw);
1804         adapter->netdev->flags &= ~IFF_UP;
1805         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1806         adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1807         adapter->state = __I40EVF_DOWN;
1808         wake_up(&adapter->down_waitqueue);
1809         dev_info(&adapter->pdev->dev, "Reset task did not complete, VF disabled\n");
1810 }
1811
1812 #define I40EVF_RESET_WAIT_MS 10
1813 #define I40EVF_RESET_WAIT_COUNT 500
1814 /**
1815  * i40evf_reset_task - Call-back task to handle hardware reset
1816  * @work: pointer to work_struct
1817  *
1818  * During reset we need to shut down and reinitialize the admin queue
1819  * before we can use it to communicate with the PF again. We also clear
1820  * and reinit the rings because that context is lost as well.
1821  **/
1822 static void i40evf_reset_task(struct work_struct *work)
1823 {
1824         struct i40evf_adapter *adapter = container_of(work,
1825                                                       struct i40evf_adapter,
1826                                                       reset_task);
1827         struct virtchnl_vf_resource *vfres = adapter->vf_res;
1828         struct net_device *netdev = adapter->netdev;
1829         struct i40e_hw *hw = &adapter->hw;
1830         struct i40evf_vlan_filter *vlf;
1831         struct i40evf_cloud_filter *cf;
1832         struct i40evf_mac_filter *f;
1833         u32 reg_val;
1834         int i = 0, err;
1835         bool running;
1836
1837         /* When device is being removed it doesn't make sense to run the reset
1838          * task, just return in such a case.
1839          */
1840         if (test_bit(__I40EVF_IN_REMOVE_TASK, &adapter->crit_section))
1841                 return;
1842
1843         while (test_and_set_bit(__I40EVF_IN_CLIENT_TASK,
1844                                 &adapter->crit_section))
1845                 usleep_range(500, 1000);
1846         if (CLIENT_ENABLED(adapter)) {
1847                 adapter->flags &= ~(I40EVF_FLAG_CLIENT_NEEDS_OPEN |
1848                                     I40EVF_FLAG_CLIENT_NEEDS_CLOSE |
1849                                     I40EVF_FLAG_CLIENT_NEEDS_L2_PARAMS |
1850                                     I40EVF_FLAG_SERVICE_CLIENT_REQUESTED);
1851                 cancel_delayed_work_sync(&adapter->client_task);
1852                 i40evf_notify_client_close(&adapter->vsi, true);
1853         }
1854         i40evf_misc_irq_disable(adapter);
1855         if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) {
1856                 adapter->flags &= ~I40EVF_FLAG_RESET_NEEDED;
1857                 /* Restart the AQ here. If we have been reset but didn't
1858                  * detect it, or if the PF had to reinit, our AQ will be hosed.
1859                  */
1860                 i40evf_shutdown_adminq(hw);
1861                 i40evf_init_adminq(hw);
1862                 i40evf_request_reset(adapter);
1863         }
1864         adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1865
1866         /* poll until we see the reset actually happen */
1867         for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1868                 reg_val = rd32(hw, I40E_VF_ARQLEN1) &
1869                           I40E_VF_ARQLEN1_ARQENABLE_MASK;
1870                 if (!reg_val)
1871                         break;
1872                 usleep_range(5000, 10000);
1873         }
1874         if (i == I40EVF_RESET_WAIT_COUNT) {
1875                 dev_info(&adapter->pdev->dev, "Never saw reset\n");
1876                 goto continue_reset; /* act like the reset happened */
1877         }
1878
1879         /* wait until the reset is complete and the PF is responding to us */
1880         for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1881                 /* sleep first to make sure a minimum wait time is met */
1882                 msleep(I40EVF_RESET_WAIT_MS);
1883
1884                 reg_val = rd32(hw, I40E_VFGEN_RSTAT) &
1885                           I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1886                 if (reg_val == VIRTCHNL_VFR_VFACTIVE)
1887                         break;
1888         }
1889
1890         pci_set_master(adapter->pdev);
1891
1892         if (i == I40EVF_RESET_WAIT_COUNT) {
1893                 dev_err(&adapter->pdev->dev, "Reset never finished (%x)\n",
1894                         reg_val);
1895                 i40evf_disable_vf(adapter);
1896                 clear_bit(__I40EVF_IN_CLIENT_TASK, &adapter->crit_section);
1897                 return; /* Do not attempt to reinit. It's dead, Jim. */
1898         }
1899
1900 continue_reset:
1901         /* We don't use netif_running() because it may be true prior to
1902          * ndo_open() returning, so we can't assume it means all our open
1903          * tasks have finished, since we're not holding the rtnl_lock here.
1904          */
1905         running = ((adapter->state == __I40EVF_RUNNING) ||
1906                    (adapter->state == __I40EVF_RESETTING));
1907
1908         if (running) {
1909                 netif_carrier_off(netdev);
1910                 netif_tx_stop_all_queues(netdev);
1911                 adapter->link_up = false;
1912                 i40evf_napi_disable_all(adapter);
1913         }
1914         i40evf_irq_disable(adapter);
1915
1916         adapter->state = __I40EVF_RESETTING;
1917         adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1918
1919         /* free the Tx/Rx rings and descriptors, might be better to just
1920          * re-use them sometime in the future
1921          */
1922         i40evf_free_all_rx_resources(adapter);
1923         i40evf_free_all_tx_resources(adapter);
1924
1925         adapter->flags |= I40EVF_FLAG_QUEUES_DISABLED;
1926         /* kill and reinit the admin queue */
1927         i40evf_shutdown_adminq(hw);
1928         adapter->current_op = VIRTCHNL_OP_UNKNOWN;
1929         err = i40evf_init_adminq(hw);
1930         if (err)
1931                 dev_info(&adapter->pdev->dev, "Failed to init adminq: %d\n",
1932                          err);
1933         adapter->aq_required = 0;
1934
1935         if (adapter->flags & I40EVF_FLAG_REINIT_ITR_NEEDED) {
1936                 err = i40evf_reinit_interrupt_scheme(adapter);
1937                 if (err)
1938                         goto reset_err;
1939         }
1940
1941         adapter->aq_required |= I40EVF_FLAG_AQ_GET_CONFIG;
1942         adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
1943
1944         spin_lock_bh(&adapter->mac_vlan_list_lock);
1945
1946         /* re-add all MAC filters */
1947         list_for_each_entry(f, &adapter->mac_filter_list, list) {
1948                 f->add = true;
1949         }
1950         /* re-add all VLAN filters */
1951         list_for_each_entry(vlf, &adapter->vlan_filter_list, list) {
1952                 vlf->add = true;
1953         }
1954
1955         spin_unlock_bh(&adapter->mac_vlan_list_lock);
1956
1957         /* check if TCs are running and re-add all cloud filters */
1958         spin_lock_bh(&adapter->cloud_filter_list_lock);
1959         if ((vfres->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_ADQ) &&
1960             adapter->num_tc) {
1961                 list_for_each_entry(cf, &adapter->cloud_filter_list, list) {
1962                         cf->add = true;
1963                 }
1964         }
1965         spin_unlock_bh(&adapter->cloud_filter_list_lock);
1966
1967         adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
1968         adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
1969         adapter->aq_required |= I40EVF_FLAG_AQ_ADD_CLOUD_FILTER;
1970         i40evf_misc_irq_enable(adapter);
1971
1972         mod_timer(&adapter->watchdog_timer, jiffies + 2);
1973
1974         /* We were running when the reset started, so we need to restore some
1975          * state here.
1976          */
1977         if (running) {
1978                 /* allocate transmit descriptors */
1979                 err = i40evf_setup_all_tx_resources(adapter);
1980                 if (err)
1981                         goto reset_err;
1982
1983                 /* allocate receive descriptors */
1984                 err = i40evf_setup_all_rx_resources(adapter);
1985                 if (err)
1986                         goto reset_err;
1987
1988                 if (adapter->flags & I40EVF_FLAG_REINIT_ITR_NEEDED) {
1989                         err = i40evf_request_traffic_irqs(adapter,
1990                                                           netdev->name);
1991                         if (err)
1992                                 goto reset_err;
1993
1994                         adapter->flags &= ~I40EVF_FLAG_REINIT_ITR_NEEDED;
1995                 }
1996
1997                 i40evf_configure(adapter);
1998
1999                 i40evf_up_complete(adapter);
2000
2001                 i40evf_irq_enable(adapter, true);
2002         } else {
2003                 adapter->state = __I40EVF_DOWN;
2004                 wake_up(&adapter->down_waitqueue);
2005         }
2006         clear_bit(__I40EVF_IN_CLIENT_TASK, &adapter->crit_section);
2007         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
2008
2009         return;
2010 reset_err:
2011         clear_bit(__I40EVF_IN_CLIENT_TASK, &adapter->crit_section);
2012         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
2013         dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
2014         i40evf_close(netdev);
2015 }
2016
2017 /**
2018  * i40evf_adminq_task - worker thread to clean the admin queue
2019  * @work: pointer to work_struct containing our data
2020  **/
2021 static void i40evf_adminq_task(struct work_struct *work)
2022 {
2023         struct i40evf_adapter *adapter =
2024                 container_of(work, struct i40evf_adapter, adminq_task);
2025         struct i40e_hw *hw = &adapter->hw;
2026         struct i40e_arq_event_info event;
2027         enum virtchnl_ops v_op;
2028         i40e_status ret, v_ret;
2029         u32 val, oldval;
2030         u16 pending;
2031
2032         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
2033                 goto out;
2034
2035         event.buf_len = I40EVF_MAX_AQ_BUF_SIZE;
2036         event.msg_buf = kzalloc(event.buf_len, GFP_KERNEL);
2037         if (!event.msg_buf)
2038                 goto out;
2039
2040         do {
2041                 ret = i40evf_clean_arq_element(hw, &event, &pending);
2042                 v_op = (enum virtchnl_ops)le32_to_cpu(event.desc.cookie_high);
2043                 v_ret = (i40e_status)le32_to_cpu(event.desc.cookie_low);
2044
2045                 if (ret || !v_op)
2046                         break; /* No event to process or error cleaning ARQ */
2047
2048                 i40evf_virtchnl_completion(adapter, v_op, v_ret, event.msg_buf,
2049                                            event.msg_len);
2050                 if (pending != 0)
2051                         memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
2052         } while (pending);
2053
2054         if ((adapter->flags &
2055              (I40EVF_FLAG_RESET_PENDING | I40EVF_FLAG_RESET_NEEDED)) ||
2056             adapter->state == __I40EVF_RESETTING)
2057                 goto freedom;
2058
2059         /* check for error indications */
2060         val = rd32(hw, hw->aq.arq.len);
2061         if (val == 0xdeadbeef || val == 0xffffffff) /* device in reset */
2062                 goto freedom;
2063         oldval = val;
2064         if (val & I40E_VF_ARQLEN1_ARQVFE_MASK) {
2065                 dev_info(&adapter->pdev->dev, "ARQ VF Error detected\n");
2066                 val &= ~I40E_VF_ARQLEN1_ARQVFE_MASK;
2067         }
2068         if (val & I40E_VF_ARQLEN1_ARQOVFL_MASK) {
2069                 dev_info(&adapter->pdev->dev, "ARQ Overflow Error detected\n");
2070                 val &= ~I40E_VF_ARQLEN1_ARQOVFL_MASK;
2071         }
2072         if (val & I40E_VF_ARQLEN1_ARQCRIT_MASK) {
2073                 dev_info(&adapter->pdev->dev, "ARQ Critical Error detected\n");
2074                 val &= ~I40E_VF_ARQLEN1_ARQCRIT_MASK;
2075         }
2076         if (oldval != val)
2077                 wr32(hw, hw->aq.arq.len, val);
2078
2079         val = rd32(hw, hw->aq.asq.len);
2080         oldval = val;
2081         if (val & I40E_VF_ATQLEN1_ATQVFE_MASK) {
2082                 dev_info(&adapter->pdev->dev, "ASQ VF Error detected\n");
2083                 val &= ~I40E_VF_ATQLEN1_ATQVFE_MASK;
2084         }
2085         if (val & I40E_VF_ATQLEN1_ATQOVFL_MASK) {
2086                 dev_info(&adapter->pdev->dev, "ASQ Overflow Error detected\n");
2087                 val &= ~I40E_VF_ATQLEN1_ATQOVFL_MASK;
2088         }
2089         if (val & I40E_VF_ATQLEN1_ATQCRIT_MASK) {
2090                 dev_info(&adapter->pdev->dev, "ASQ Critical Error detected\n");
2091                 val &= ~I40E_VF_ATQLEN1_ATQCRIT_MASK;
2092         }
2093         if (oldval != val)
2094                 wr32(hw, hw->aq.asq.len, val);
2095
2096 freedom:
2097         kfree(event.msg_buf);
2098 out:
2099         /* re-enable Admin queue interrupt cause */
2100         i40evf_misc_irq_enable(adapter);
2101 }
2102
2103 /**
2104  * i40evf_client_task - worker thread to perform client work
2105  * @work: pointer to work_struct containing our data
2106  *
2107  * This task handles client interactions. Because client calls can be
2108  * reentrant, we can't handle them in the watchdog.
2109  **/
2110 static void i40evf_client_task(struct work_struct *work)
2111 {
2112         struct i40evf_adapter *adapter =
2113                 container_of(work, struct i40evf_adapter, client_task.work);
2114
2115         /* If we can't get the client bit, just give up. We'll be rescheduled
2116          * later.
2117          */
2118
2119         if (test_and_set_bit(__I40EVF_IN_CLIENT_TASK, &adapter->crit_section))
2120                 return;
2121
2122         if (adapter->flags & I40EVF_FLAG_SERVICE_CLIENT_REQUESTED) {
2123                 i40evf_client_subtask(adapter);
2124                 adapter->flags &= ~I40EVF_FLAG_SERVICE_CLIENT_REQUESTED;
2125                 goto out;
2126         }
2127         if (adapter->flags & I40EVF_FLAG_CLIENT_NEEDS_L2_PARAMS) {
2128                 i40evf_notify_client_l2_params(&adapter->vsi);
2129                 adapter->flags &= ~I40EVF_FLAG_CLIENT_NEEDS_L2_PARAMS;
2130                 goto out;
2131         }
2132         if (adapter->flags & I40EVF_FLAG_CLIENT_NEEDS_CLOSE) {
2133                 i40evf_notify_client_close(&adapter->vsi, false);
2134                 adapter->flags &= ~I40EVF_FLAG_CLIENT_NEEDS_CLOSE;
2135                 goto out;
2136         }
2137         if (adapter->flags & I40EVF_FLAG_CLIENT_NEEDS_OPEN) {
2138                 i40evf_notify_client_open(&adapter->vsi);
2139                 adapter->flags &= ~I40EVF_FLAG_CLIENT_NEEDS_OPEN;
2140         }
2141 out:
2142         clear_bit(__I40EVF_IN_CLIENT_TASK, &adapter->crit_section);
2143 }
2144
2145 /**
2146  * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
2147  * @adapter: board private structure
2148  *
2149  * Free all transmit software resources
2150  **/
2151 void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
2152 {
2153         int i;
2154
2155         if (!adapter->tx_rings)
2156                 return;
2157
2158         for (i = 0; i < adapter->num_active_queues; i++)
2159                 if (adapter->tx_rings[i].desc)
2160                         i40evf_free_tx_resources(&adapter->tx_rings[i]);
2161 }
2162
2163 /**
2164  * i40evf_setup_all_tx_resources - allocate all queues Tx resources
2165  * @adapter: board private structure
2166  *
2167  * If this function returns with an error, then it's possible one or
2168  * more of the rings is populated (while the rest are not).  It is the
2169  * callers duty to clean those orphaned rings.
2170  *
2171  * Return 0 on success, negative on failure
2172  **/
2173 static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter)
2174 {
2175         int i, err = 0;
2176
2177         for (i = 0; i < adapter->num_active_queues; i++) {
2178                 adapter->tx_rings[i].count = adapter->tx_desc_count;
2179                 err = i40evf_setup_tx_descriptors(&adapter->tx_rings[i]);
2180                 if (!err)
2181                         continue;
2182                 dev_err(&adapter->pdev->dev,
2183                         "Allocation for Tx Queue %u failed\n", i);
2184                 break;
2185         }
2186
2187         return err;
2188 }
2189
2190 /**
2191  * i40evf_setup_all_rx_resources - allocate all queues Rx resources
2192  * @adapter: board private structure
2193  *
2194  * If this function returns with an error, then it's possible one or
2195  * more of the rings is populated (while the rest are not).  It is the
2196  * callers duty to clean those orphaned rings.
2197  *
2198  * Return 0 on success, negative on failure
2199  **/
2200 static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter)
2201 {
2202         int i, err = 0;
2203
2204         for (i = 0; i < adapter->num_active_queues; i++) {
2205                 adapter->rx_rings[i].count = adapter->rx_desc_count;
2206                 err = i40evf_setup_rx_descriptors(&adapter->rx_rings[i]);
2207                 if (!err)
2208                         continue;
2209                 dev_err(&adapter->pdev->dev,
2210                         "Allocation for Rx Queue %u failed\n", i);
2211                 break;
2212         }
2213         return err;
2214 }
2215
2216 /**
2217  * i40evf_free_all_rx_resources - Free Rx Resources for All Queues
2218  * @adapter: board private structure
2219  *
2220  * Free all receive software resources
2221  **/
2222 void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
2223 {
2224         int i;
2225
2226         if (!adapter->rx_rings)
2227                 return;
2228
2229         for (i = 0; i < adapter->num_active_queues; i++)
2230                 if (adapter->rx_rings[i].desc)
2231                         i40evf_free_rx_resources(&adapter->rx_rings[i]);
2232 }
2233
2234 /**
2235  * i40evf_validate_tx_bandwidth - validate the max Tx bandwidth
2236  * @adapter: board private structure
2237  * @max_tx_rate: max Tx bw for a tc
2238  **/
2239 static int i40evf_validate_tx_bandwidth(struct i40evf_adapter *adapter,
2240                                         u64 max_tx_rate)
2241 {
2242         int speed = 0, ret = 0;
2243
2244         switch (adapter->link_speed) {
2245         case I40E_LINK_SPEED_40GB:
2246                 speed = 40000;
2247                 break;
2248         case I40E_LINK_SPEED_25GB:
2249                 speed = 25000;
2250                 break;
2251         case I40E_LINK_SPEED_20GB:
2252                 speed = 20000;
2253                 break;
2254         case I40E_LINK_SPEED_10GB:
2255                 speed = 10000;
2256                 break;
2257         case I40E_LINK_SPEED_1GB:
2258                 speed = 1000;
2259                 break;
2260         case I40E_LINK_SPEED_100MB:
2261                 speed = 100;
2262                 break;
2263         default:
2264                 break;
2265         }
2266
2267         if (max_tx_rate > speed) {
2268                 dev_err(&adapter->pdev->dev,
2269                         "Invalid tx rate specified\n");
2270                 ret = -EINVAL;
2271         }
2272
2273         return ret;
2274 }
2275
2276 /**
2277  * i40evf_validate_channel_config - validate queue mapping info
2278  * @adapter: board private structure
2279  * @mqprio_qopt: queue parameters
2280  *
2281  * This function validates if the config provided by the user to
2282  * configure queue channels is valid or not. Returns 0 on a valid
2283  * config.
2284  **/
2285 static int i40evf_validate_ch_config(struct i40evf_adapter *adapter,
2286                                      struct tc_mqprio_qopt_offload *mqprio_qopt)
2287 {
2288         u64 total_max_rate = 0;
2289         int i, num_qps = 0;
2290         u64 tx_rate = 0;
2291         int ret = 0;
2292
2293         if (mqprio_qopt->qopt.num_tc > I40EVF_MAX_TRAFFIC_CLASS ||
2294             mqprio_qopt->qopt.num_tc < 1)
2295                 return -EINVAL;
2296
2297         for (i = 0; i <= mqprio_qopt->qopt.num_tc - 1; i++) {
2298                 if (!mqprio_qopt->qopt.count[i] ||
2299                     mqprio_qopt->qopt.offset[i] != num_qps)
2300                         return -EINVAL;
2301                 if (mqprio_qopt->min_rate[i]) {
2302                         dev_err(&adapter->pdev->dev,
2303                                 "Invalid min tx rate (greater than 0) specified\n");
2304                         return -EINVAL;
2305                 }
2306                 /*convert to Mbps */
2307                 tx_rate = div_u64(mqprio_qopt->max_rate[i],
2308                                   I40EVF_MBPS_DIVISOR);
2309                 total_max_rate += tx_rate;
2310                 num_qps += mqprio_qopt->qopt.count[i];
2311         }
2312         if (num_qps > I40EVF_MAX_REQ_QUEUES)
2313                 return -EINVAL;
2314
2315         ret = i40evf_validate_tx_bandwidth(adapter, total_max_rate);
2316         return ret;
2317 }
2318
2319 /**
2320  * i40evf_del_all_cloud_filters - delete all cloud filters
2321  * on the traffic classes
2322  **/
2323 static void i40evf_del_all_cloud_filters(struct i40evf_adapter *adapter)
2324 {
2325         struct i40evf_cloud_filter *cf, *cftmp;
2326
2327         spin_lock_bh(&adapter->cloud_filter_list_lock);
2328         list_for_each_entry_safe(cf, cftmp, &adapter->cloud_filter_list,
2329                                  list) {
2330                 list_del(&cf->list);
2331                 kfree(cf);
2332                 adapter->num_cloud_filters--;
2333         }
2334         spin_unlock_bh(&adapter->cloud_filter_list_lock);
2335 }
2336
2337 /**
2338  * __i40evf_setup_tc - configure multiple traffic classes
2339  * @netdev: network interface device structure
2340  * @type_date: tc offload data
2341  *
2342  * This function processes the config information provided by the
2343  * user to configure traffic classes/queue channels and packages the
2344  * information to request the PF to setup traffic classes.
2345  *
2346  * Returns 0 on success.
2347  **/
2348 static int __i40evf_setup_tc(struct net_device *netdev, void *type_data)
2349 {
2350         struct tc_mqprio_qopt_offload *mqprio_qopt = type_data;
2351         struct i40evf_adapter *adapter = netdev_priv(netdev);
2352         struct virtchnl_vf_resource *vfres = adapter->vf_res;
2353         u8 num_tc = 0, total_qps = 0;
2354         int ret = 0, netdev_tc = 0;
2355         u64 max_tx_rate;
2356         u16 mode;
2357         int i;
2358
2359         num_tc = mqprio_qopt->qopt.num_tc;
2360         mode = mqprio_qopt->mode;
2361
2362         /* delete queue_channel */
2363         if (!mqprio_qopt->qopt.hw) {
2364                 if (adapter->ch_config.state == __I40EVF_TC_RUNNING) {
2365                         /* reset the tc configuration */
2366                         netdev_reset_tc(netdev);
2367                         adapter->num_tc = 0;
2368                         netif_tx_stop_all_queues(netdev);
2369                         netif_tx_disable(netdev);
2370                         i40evf_del_all_cloud_filters(adapter);
2371                         adapter->aq_required = I40EVF_FLAG_AQ_DISABLE_CHANNELS;
2372                         goto exit;
2373                 } else {
2374                         return -EINVAL;
2375                 }
2376         }
2377
2378         /* add queue channel */
2379         if (mode == TC_MQPRIO_MODE_CHANNEL) {
2380                 if (!(vfres->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_ADQ)) {
2381                         dev_err(&adapter->pdev->dev, "ADq not supported\n");
2382                         return -EOPNOTSUPP;
2383                 }
2384                 if (adapter->ch_config.state != __I40EVF_TC_INVALID) {
2385                         dev_err(&adapter->pdev->dev, "TC configuration already exists\n");
2386                         return -EINVAL;
2387                 }
2388
2389                 ret = i40evf_validate_ch_config(adapter, mqprio_qopt);
2390                 if (ret)
2391                         return ret;
2392                 /* Return if same TC config is requested */
2393                 if (adapter->num_tc == num_tc)
2394                         return 0;
2395                 adapter->num_tc = num_tc;
2396
2397                 for (i = 0; i < I40EVF_MAX_TRAFFIC_CLASS; i++) {
2398                         if (i < num_tc) {
2399                                 adapter->ch_config.ch_info[i].count =
2400                                         mqprio_qopt->qopt.count[i];
2401                                 adapter->ch_config.ch_info[i].offset =
2402                                         mqprio_qopt->qopt.offset[i];
2403                                 total_qps += mqprio_qopt->qopt.count[i];
2404                                 max_tx_rate = mqprio_qopt->max_rate[i];
2405                                 /* convert to Mbps */
2406                                 max_tx_rate = div_u64(max_tx_rate,
2407                                                       I40EVF_MBPS_DIVISOR);
2408                                 adapter->ch_config.ch_info[i].max_tx_rate =
2409                                         max_tx_rate;
2410                         } else {
2411                                 adapter->ch_config.ch_info[i].count = 1;
2412                                 adapter->ch_config.ch_info[i].offset = 0;
2413                         }
2414                 }
2415                 adapter->ch_config.total_qps = total_qps;
2416                 netif_tx_stop_all_queues(netdev);
2417                 netif_tx_disable(netdev);
2418                 adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_CHANNELS;
2419                 netdev_reset_tc(netdev);
2420                 /* Report the tc mapping up the stack */
2421                 netdev_set_num_tc(adapter->netdev, num_tc);
2422                 for (i = 0; i < I40EVF_MAX_TRAFFIC_CLASS; i++) {
2423                         u16 qcount = mqprio_qopt->qopt.count[i];
2424                         u16 qoffset = mqprio_qopt->qopt.offset[i];
2425
2426                         if (i < num_tc)
2427                                 netdev_set_tc_queue(netdev, netdev_tc++, qcount,
2428                                                     qoffset);
2429                 }
2430         }
2431 exit:
2432         return ret;
2433 }
2434
2435 /**
2436  * i40evf_parse_cls_flower - Parse tc flower filters provided by kernel
2437  * @adapter: board private structure
2438  * @cls_flower: pointer to struct tc_cls_flower_offload
2439  * @filter: pointer to cloud filter structure
2440  */
2441 static int i40evf_parse_cls_flower(struct i40evf_adapter *adapter,
2442                                    struct tc_cls_flower_offload *f,
2443                                    struct i40evf_cloud_filter *filter)
2444 {
2445         u16 n_proto_mask = 0;
2446         u16 n_proto_key = 0;
2447         u8 field_flags = 0;
2448         u16 addr_type = 0;
2449         u16 n_proto = 0;
2450         int i = 0;
2451         struct virtchnl_filter *vf = &filter->f;
2452
2453         if (f->dissector->used_keys &
2454             ~(BIT(FLOW_DISSECTOR_KEY_CONTROL) |
2455               BIT(FLOW_DISSECTOR_KEY_BASIC) |
2456               BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS) |
2457               BIT(FLOW_DISSECTOR_KEY_VLAN) |
2458               BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS) |
2459               BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS) |
2460               BIT(FLOW_DISSECTOR_KEY_PORTS) |
2461               BIT(FLOW_DISSECTOR_KEY_ENC_KEYID))) {
2462                 dev_err(&adapter->pdev->dev, "Unsupported key used: 0x%x\n",
2463                         f->dissector->used_keys);
2464                 return -EOPNOTSUPP;
2465         }
2466
2467         if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ENC_KEYID)) {
2468                 struct flow_dissector_key_keyid *mask =
2469                         skb_flow_dissector_target(f->dissector,
2470                                                   FLOW_DISSECTOR_KEY_ENC_KEYID,
2471                                                   f->mask);
2472
2473                 if (mask->keyid != 0)
2474                         field_flags |= I40EVF_CLOUD_FIELD_TEN_ID;
2475         }
2476
2477         if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_BASIC)) {
2478                 struct flow_dissector_key_basic *key =
2479                         skb_flow_dissector_target(f->dissector,
2480                                                   FLOW_DISSECTOR_KEY_BASIC,
2481                                                   f->key);
2482
2483                 struct flow_dissector_key_basic *mask =
2484                         skb_flow_dissector_target(f->dissector,
2485                                                   FLOW_DISSECTOR_KEY_BASIC,
2486                                                   f->mask);
2487                 n_proto_key = ntohs(key->n_proto);
2488                 n_proto_mask = ntohs(mask->n_proto);
2489
2490                 if (n_proto_key == ETH_P_ALL) {
2491                         n_proto_key = 0;
2492                         n_proto_mask = 0;
2493                 }
2494                 n_proto = n_proto_key & n_proto_mask;
2495                 if (n_proto != ETH_P_IP && n_proto != ETH_P_IPV6)
2496                         return -EINVAL;
2497                 if (n_proto == ETH_P_IPV6) {
2498                         /* specify flow type as TCP IPv6 */
2499                         vf->flow_type = VIRTCHNL_TCP_V6_FLOW;
2500                 }
2501
2502                 if (key->ip_proto != IPPROTO_TCP) {
2503                         dev_info(&adapter->pdev->dev, "Only TCP transport is supported\n");
2504                         return -EINVAL;
2505                 }
2506         }
2507
2508         if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ETH_ADDRS)) {
2509                 struct flow_dissector_key_eth_addrs *key =
2510                         skb_flow_dissector_target(f->dissector,
2511                                                   FLOW_DISSECTOR_KEY_ETH_ADDRS,
2512                                                   f->key);
2513
2514                 struct flow_dissector_key_eth_addrs *mask =
2515                         skb_flow_dissector_target(f->dissector,
2516                                                   FLOW_DISSECTOR_KEY_ETH_ADDRS,
2517                                                   f->mask);
2518                 /* use is_broadcast and is_zero to check for all 0xf or 0 */
2519                 if (!is_zero_ether_addr(mask->dst)) {
2520                         if (is_broadcast_ether_addr(mask->dst)) {
2521                                 field_flags |= I40EVF_CLOUD_FIELD_OMAC;
2522                         } else {
2523                                 dev_err(&adapter->pdev->dev, "Bad ether dest mask %pM\n",
2524                                         mask->dst);
2525                                 return I40E_ERR_CONFIG;
2526                         }
2527                 }
2528
2529                 if (!is_zero_ether_addr(mask->src)) {
2530                         if (is_broadcast_ether_addr(mask->src)) {
2531                                 field_flags |= I40EVF_CLOUD_FIELD_IMAC;
2532                         } else {
2533                                 dev_err(&adapter->pdev->dev, "Bad ether src mask %pM\n",
2534                                         mask->src);
2535                                 return I40E_ERR_CONFIG;
2536                         }
2537                 }
2538
2539                 if (!is_zero_ether_addr(key->dst))
2540                         if (is_valid_ether_addr(key->dst) ||
2541                             is_multicast_ether_addr(key->dst)) {
2542                                 /* set the mask if a valid dst_mac address */
2543                                 for (i = 0; i < ETH_ALEN; i++)
2544                                         vf->mask.tcp_spec.dst_mac[i] |= 0xff;
2545                                 ether_addr_copy(vf->data.tcp_spec.dst_mac,
2546                                                 key->dst);
2547                         }
2548
2549                 if (!is_zero_ether_addr(key->src))
2550                         if (is_valid_ether_addr(key->src) ||
2551                             is_multicast_ether_addr(key->src)) {
2552                                 /* set the mask if a valid dst_mac address */
2553                                 for (i = 0; i < ETH_ALEN; i++)
2554                                         vf->mask.tcp_spec.src_mac[i] |= 0xff;
2555                                 ether_addr_copy(vf->data.tcp_spec.src_mac,
2556                                                 key->src);
2557                 }
2558         }
2559
2560         if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_VLAN)) {
2561                 struct flow_dissector_key_vlan *key =
2562                         skb_flow_dissector_target(f->dissector,
2563                                                   FLOW_DISSECTOR_KEY_VLAN,
2564                                                   f->key);
2565                 struct flow_dissector_key_vlan *mask =
2566                         skb_flow_dissector_target(f->dissector,
2567                                                   FLOW_DISSECTOR_KEY_VLAN,
2568                                                   f->mask);
2569
2570                 if (mask->vlan_id) {
2571                         if (mask->vlan_id == VLAN_VID_MASK) {
2572                                 field_flags |= I40EVF_CLOUD_FIELD_IVLAN;
2573                         } else {
2574                                 dev_err(&adapter->pdev->dev, "Bad vlan mask %u\n",
2575                                         mask->vlan_id);
2576                                 return I40E_ERR_CONFIG;
2577                         }
2578                 }
2579                 vf->mask.tcp_spec.vlan_id |= cpu_to_be16(0xffff);
2580                 vf->data.tcp_spec.vlan_id = cpu_to_be16(key->vlan_id);
2581         }
2582
2583         if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_CONTROL)) {
2584                 struct flow_dissector_key_control *key =
2585                         skb_flow_dissector_target(f->dissector,
2586                                                   FLOW_DISSECTOR_KEY_CONTROL,
2587                                                   f->key);
2588
2589                 addr_type = key->addr_type;
2590         }
2591
2592         if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) {
2593                 struct flow_dissector_key_ipv4_addrs *key =
2594                         skb_flow_dissector_target(f->dissector,
2595                                                   FLOW_DISSECTOR_KEY_IPV4_ADDRS,
2596                                                   f->key);
2597                 struct flow_dissector_key_ipv4_addrs *mask =
2598                         skb_flow_dissector_target(f->dissector,
2599                                                   FLOW_DISSECTOR_KEY_IPV4_ADDRS,
2600                                                   f->mask);
2601
2602                 if (mask->dst) {
2603                         if (mask->dst == cpu_to_be32(0xffffffff)) {
2604                                 field_flags |= I40EVF_CLOUD_FIELD_IIP;
2605                         } else {
2606                                 dev_err(&adapter->pdev->dev, "Bad ip dst mask 0x%08x\n",
2607                                         be32_to_cpu(mask->dst));
2608                                 return I40E_ERR_CONFIG;
2609                         }
2610                 }
2611
2612                 if (mask->src) {
2613                         if (mask->src == cpu_to_be32(0xffffffff)) {
2614                                 field_flags |= I40EVF_CLOUD_FIELD_IIP;
2615                         } else {
2616                                 dev_err(&adapter->pdev->dev, "Bad ip src mask 0x%08x\n",
2617                                         be32_to_cpu(mask->dst));
2618                                 return I40E_ERR_CONFIG;
2619                         }
2620                 }
2621
2622                 if (field_flags & I40EVF_CLOUD_FIELD_TEN_ID) {
2623                         dev_info(&adapter->pdev->dev, "Tenant id not allowed for ip filter\n");
2624                         return I40E_ERR_CONFIG;
2625                 }
2626                 if (key->dst) {
2627                         vf->mask.tcp_spec.dst_ip[0] |= cpu_to_be32(0xffffffff);
2628                         vf->data.tcp_spec.dst_ip[0] = key->dst;
2629                 }
2630                 if (key->src) {
2631                         vf->mask.tcp_spec.src_ip[0] |= cpu_to_be32(0xffffffff);
2632                         vf->data.tcp_spec.src_ip[0] = key->src;
2633                 }
2634         }
2635
2636         if (addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS) {
2637                 struct flow_dissector_key_ipv6_addrs *key =
2638                         skb_flow_dissector_target(f->dissector,
2639                                                   FLOW_DISSECTOR_KEY_IPV6_ADDRS,
2640                                                   f->key);
2641                 struct flow_dissector_key_ipv6_addrs *mask =
2642                         skb_flow_dissector_target(f->dissector,
2643                                                   FLOW_DISSECTOR_KEY_IPV6_ADDRS,
2644                                                   f->mask);
2645
2646                 /* validate mask, make sure it is not IPV6_ADDR_ANY */
2647                 if (ipv6_addr_any(&mask->dst)) {
2648                         dev_err(&adapter->pdev->dev, "Bad ipv6 dst mask 0x%02x\n",
2649                                 IPV6_ADDR_ANY);
2650                         return I40E_ERR_CONFIG;
2651                 }
2652
2653                 /* src and dest IPv6 address should not be LOOPBACK
2654                  * (0:0:0:0:0:0:0:1) which can be represented as ::1
2655                  */
2656                 if (ipv6_addr_loopback(&key->dst) ||
2657                     ipv6_addr_loopback(&key->src)) {
2658                         dev_err(&adapter->pdev->dev,
2659                                 "ipv6 addr should not be loopback\n");
2660                         return I40E_ERR_CONFIG;
2661                 }
2662                 if (!ipv6_addr_any(&mask->dst) || !ipv6_addr_any(&mask->src))
2663                         field_flags |= I40EVF_CLOUD_FIELD_IIP;
2664
2665                 for (i = 0; i < 4; i++)
2666                         vf->mask.tcp_spec.dst_ip[i] |= cpu_to_be32(0xffffffff);
2667                 memcpy(&vf->data.tcp_spec.dst_ip, &key->dst.s6_addr32,
2668                        sizeof(vf->data.tcp_spec.dst_ip));
2669                 for (i = 0; i < 4; i++)
2670                         vf->mask.tcp_spec.src_ip[i] |= cpu_to_be32(0xffffffff);
2671                 memcpy(&vf->data.tcp_spec.src_ip, &key->src.s6_addr32,
2672                        sizeof(vf->data.tcp_spec.src_ip));
2673         }
2674         if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_PORTS)) {
2675                 struct flow_dissector_key_ports *key =
2676                         skb_flow_dissector_target(f->dissector,
2677                                                   FLOW_DISSECTOR_KEY_PORTS,
2678                                                   f->key);
2679                 struct flow_dissector_key_ports *mask =
2680                         skb_flow_dissector_target(f->dissector,
2681                                                   FLOW_DISSECTOR_KEY_PORTS,
2682                                                   f->mask);
2683
2684                 if (mask->src) {
2685                         if (mask->src == cpu_to_be16(0xffff)) {
2686                                 field_flags |= I40EVF_CLOUD_FIELD_IIP;
2687                         } else {
2688                                 dev_err(&adapter->pdev->dev, "Bad src port mask %u\n",
2689                                         be16_to_cpu(mask->src));
2690                                 return I40E_ERR_CONFIG;
2691                         }
2692                 }
2693
2694                 if (mask->dst) {
2695                         if (mask->dst == cpu_to_be16(0xffff)) {
2696                                 field_flags |= I40EVF_CLOUD_FIELD_IIP;
2697                         } else {
2698                                 dev_err(&adapter->pdev->dev, "Bad dst port mask %u\n",
2699                                         be16_to_cpu(mask->dst));
2700                                 return I40E_ERR_CONFIG;
2701                         }
2702                 }
2703                 if (key->dst) {
2704                         vf->mask.tcp_spec.dst_port |= cpu_to_be16(0xffff);
2705                         vf->data.tcp_spec.dst_port = key->dst;
2706                 }
2707
2708                 if (key->src) {
2709                         vf->mask.tcp_spec.src_port |= cpu_to_be16(0xffff);
2710                         vf->data.tcp_spec.src_port = key->src;
2711                 }
2712         }
2713         vf->field_flags = field_flags;
2714
2715         return 0;
2716 }
2717
2718 /**
2719  * i40evf_handle_tclass - Forward to a traffic class on the device
2720  * @adapter: board private structure
2721  * @tc: traffic class index on the device
2722  * @filter: pointer to cloud filter structure
2723  */
2724 static int i40evf_handle_tclass(struct i40evf_adapter *adapter, u32 tc,
2725                                 struct i40evf_cloud_filter *filter)
2726 {
2727         if (tc == 0)
2728                 return 0;
2729         if (tc < adapter->num_tc) {
2730                 if (!filter->f.data.tcp_spec.dst_port) {
2731                         dev_err(&adapter->pdev->dev,
2732                                 "Specify destination port to redirect to traffic class other than TC0\n");
2733                         return -EINVAL;
2734                 }
2735         }
2736         /* redirect to a traffic class on the same device */
2737         filter->f.action = VIRTCHNL_ACTION_TC_REDIRECT;
2738         filter->f.action_meta = tc;
2739         return 0;
2740 }
2741
2742 /**
2743  * i40evf_configure_clsflower - Add tc flower filters
2744  * @adapter: board private structure
2745  * @cls_flower: Pointer to struct tc_cls_flower_offload
2746  */
2747 static int i40evf_configure_clsflower(struct i40evf_adapter *adapter,
2748                                       struct tc_cls_flower_offload *cls_flower)
2749 {
2750         int tc = tc_classid_to_hwtc(adapter->netdev, cls_flower->classid);
2751         struct i40evf_cloud_filter *filter = NULL;
2752         int err = -EINVAL, count = 50;
2753
2754         if (tc < 0) {
2755                 dev_err(&adapter->pdev->dev, "Invalid traffic class\n");
2756                 return -EINVAL;
2757         }
2758
2759         filter = kzalloc(sizeof(*filter), GFP_KERNEL);
2760         if (!filter)
2761                 return -ENOMEM;
2762
2763         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
2764                                 &adapter->crit_section)) {
2765                 if (--count == 0)
2766                         goto err;
2767                 udelay(1);
2768         }
2769
2770         filter->cookie = cls_flower->cookie;
2771
2772         /* set the mask to all zeroes to begin with */
2773         memset(&filter->f.mask.tcp_spec, 0, sizeof(struct virtchnl_l4_spec));
2774         /* start out with flow type and eth type IPv4 to begin with */
2775         filter->f.flow_type = VIRTCHNL_TCP_V4_FLOW;
2776         err = i40evf_parse_cls_flower(adapter, cls_flower, filter);
2777         if (err < 0)
2778                 goto err;
2779
2780         err = i40evf_handle_tclass(adapter, tc, filter);
2781         if (err < 0)
2782                 goto err;
2783
2784         /* add filter to the list */
2785         spin_lock_bh(&adapter->cloud_filter_list_lock);
2786         list_add_tail(&filter->list, &adapter->cloud_filter_list);
2787         adapter->num_cloud_filters++;
2788         filter->add = true;
2789         adapter->aq_required |= I40EVF_FLAG_AQ_ADD_CLOUD_FILTER;
2790         spin_unlock_bh(&adapter->cloud_filter_list_lock);
2791 err:
2792         if (err)
2793                 kfree(filter);
2794
2795         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
2796         return err;
2797 }
2798
2799 /* i40evf_find_cf - Find the cloud filter in the list
2800  * @adapter: Board private structure
2801  * @cookie: filter specific cookie
2802  *
2803  * Returns ptr to the filter object or NULL. Must be called while holding the
2804  * cloud_filter_list_lock.
2805  */
2806 static struct i40evf_cloud_filter *i40evf_find_cf(struct i40evf_adapter *adapter,
2807                                                   unsigned long *cookie)
2808 {
2809         struct i40evf_cloud_filter *filter = NULL;
2810
2811         if (!cookie)
2812                 return NULL;
2813
2814         list_for_each_entry(filter, &adapter->cloud_filter_list, list) {
2815                 if (!memcmp(cookie, &filter->cookie, sizeof(filter->cookie)))
2816                         return filter;
2817         }
2818         return NULL;
2819 }
2820
2821 /**
2822  * i40evf_delete_clsflower - Remove tc flower filters
2823  * @adapter: board private structure
2824  * @cls_flower: Pointer to struct tc_cls_flower_offload
2825  */
2826 static int i40evf_delete_clsflower(struct i40evf_adapter *adapter,
2827                                    struct tc_cls_flower_offload *cls_flower)
2828 {
2829         struct i40evf_cloud_filter *filter = NULL;
2830         int err = 0;
2831
2832         spin_lock_bh(&adapter->cloud_filter_list_lock);
2833         filter = i40evf_find_cf(adapter, &cls_flower->cookie);
2834         if (filter) {
2835                 filter->del = true;
2836                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_CLOUD_FILTER;
2837         } else {
2838                 err = -EINVAL;
2839         }
2840         spin_unlock_bh(&adapter->cloud_filter_list_lock);
2841
2842         return err;
2843 }
2844
2845 /**
2846  * i40evf_setup_tc_cls_flower - flower classifier offloads
2847  * @netdev: net device to configure
2848  * @type_data: offload data
2849  */
2850 static int i40evf_setup_tc_cls_flower(struct i40evf_adapter *adapter,
2851                                       struct tc_cls_flower_offload *cls_flower)
2852 {
2853         if (cls_flower->common.chain_index)
2854                 return -EOPNOTSUPP;
2855
2856         switch (cls_flower->command) {
2857         case TC_CLSFLOWER_REPLACE:
2858                 return i40evf_configure_clsflower(adapter, cls_flower);
2859         case TC_CLSFLOWER_DESTROY:
2860                 return i40evf_delete_clsflower(adapter, cls_flower);
2861         case TC_CLSFLOWER_STATS:
2862                 return -EOPNOTSUPP;
2863         default:
2864                 return -EOPNOTSUPP;
2865         }
2866 }
2867
2868 /**
2869  * i40evf_setup_tc_block_cb - block callback for tc
2870  * @type: type of offload
2871  * @type_data: offload data
2872  * @cb_priv:
2873  *
2874  * This function is the block callback for traffic classes
2875  **/
2876 static int i40evf_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
2877                                     void *cb_priv)
2878 {
2879         switch (type) {
2880         case TC_SETUP_CLSFLOWER:
2881                 return i40evf_setup_tc_cls_flower(cb_priv, type_data);
2882         default:
2883                 return -EOPNOTSUPP;
2884         }
2885 }
2886
2887 /**
2888  * i40evf_setup_tc_block - register callbacks for tc
2889  * @netdev: network interface device structure
2890  * @f: tc offload data
2891  *
2892  * This function registers block callbacks for tc
2893  * offloads
2894  **/
2895 static int i40evf_setup_tc_block(struct net_device *dev,
2896                                  struct tc_block_offload *f)
2897 {
2898         struct i40evf_adapter *adapter = netdev_priv(dev);
2899
2900         if (f->binder_type != TCF_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
2901                 return -EOPNOTSUPP;
2902
2903         switch (f->command) {
2904         case TC_BLOCK_BIND:
2905                 return tcf_block_cb_register(f->block, i40evf_setup_tc_block_cb,
2906                                              adapter, adapter, f->extack);
2907         case TC_BLOCK_UNBIND:
2908                 tcf_block_cb_unregister(f->block, i40evf_setup_tc_block_cb,
2909                                         adapter);
2910                 return 0;
2911         default:
2912                 return -EOPNOTSUPP;
2913         }
2914 }
2915
2916 /**
2917  * i40evf_setup_tc - configure multiple traffic classes
2918  * @netdev: network interface device structure
2919  * @type: type of offload
2920  * @type_date: tc offload data
2921  *
2922  * This function is the callback to ndo_setup_tc in the
2923  * netdev_ops.
2924  *
2925  * Returns 0 on success
2926  **/
2927 static int i40evf_setup_tc(struct net_device *netdev, enum tc_setup_type type,
2928                            void *type_data)
2929 {
2930         switch (type) {
2931         case TC_SETUP_QDISC_MQPRIO:
2932                 return __i40evf_setup_tc(netdev, type_data);
2933         case TC_SETUP_BLOCK:
2934                 return i40evf_setup_tc_block(netdev, type_data);
2935         default:
2936                 return -EOPNOTSUPP;
2937         }
2938 }
2939
2940 /**
2941  * i40evf_open - Called when a network interface is made active
2942  * @netdev: network interface device structure
2943  *
2944  * Returns 0 on success, negative value on failure
2945  *
2946  * The open entry point is called when a network interface is made
2947  * active by the system (IFF_UP).  At this point all resources needed
2948  * for transmit and receive operations are allocated, the interrupt
2949  * handler is registered with the OS, the watchdog timer is started,
2950  * and the stack is notified that the interface is ready.
2951  **/
2952 static int i40evf_open(struct net_device *netdev)
2953 {
2954         struct i40evf_adapter *adapter = netdev_priv(netdev);
2955         int err;
2956
2957         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
2958                 dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
2959                 return -EIO;
2960         }
2961
2962         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
2963                                 &adapter->crit_section))
2964                 usleep_range(500, 1000);
2965
2966         if (adapter->state != __I40EVF_DOWN) {
2967                 err = -EBUSY;
2968                 goto err_unlock;
2969         }
2970
2971         /* allocate transmit descriptors */
2972         err = i40evf_setup_all_tx_resources(adapter);
2973         if (err)
2974                 goto err_setup_tx;
2975
2976         /* allocate receive descriptors */
2977         err = i40evf_setup_all_rx_resources(adapter);
2978         if (err)
2979                 goto err_setup_rx;
2980
2981         /* clear any pending interrupts, may auto mask */
2982         err = i40evf_request_traffic_irqs(adapter, netdev->name);
2983         if (err)
2984                 goto err_req_irq;
2985
2986         spin_lock_bh(&adapter->mac_vlan_list_lock);
2987
2988         i40evf_add_filter(adapter, adapter->hw.mac.addr);
2989
2990         spin_unlock_bh(&adapter->mac_vlan_list_lock);
2991
2992         i40evf_configure(adapter);
2993
2994         i40evf_up_complete(adapter);
2995
2996         i40evf_irq_enable(adapter, true);
2997
2998         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
2999
3000         return 0;
3001
3002 err_req_irq:
3003         i40evf_down(adapter);
3004         i40evf_free_traffic_irqs(adapter);
3005 err_setup_rx:
3006         i40evf_free_all_rx_resources(adapter);
3007 err_setup_tx:
3008         i40evf_free_all_tx_resources(adapter);
3009 err_unlock:
3010         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
3011
3012         return err;
3013 }
3014
3015 /**
3016  * i40evf_close - Disables a network interface
3017  * @netdev: network interface device structure
3018  *
3019  * Returns 0, this is not allowed to fail
3020  *
3021  * The close entry point is called when an interface is de-activated
3022  * by the OS.  The hardware is still under the drivers control, but
3023  * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
3024  * are freed, along with all transmit and receive resources.
3025  **/
3026 static int i40evf_close(struct net_device *netdev)
3027 {
3028         struct i40evf_adapter *adapter = netdev_priv(netdev);
3029         int status;
3030
3031         if (adapter->state <= __I40EVF_DOWN_PENDING)
3032                 return 0;
3033
3034         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
3035                                 &adapter->crit_section))
3036                 usleep_range(500, 1000);
3037
3038         set_bit(__I40E_VSI_DOWN, adapter->vsi.state);
3039         if (CLIENT_ENABLED(adapter))
3040                 adapter->flags |= I40EVF_FLAG_CLIENT_NEEDS_CLOSE;
3041
3042         i40evf_down(adapter);
3043         adapter->state = __I40EVF_DOWN_PENDING;
3044         i40evf_free_traffic_irqs(adapter);
3045
3046         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
3047
3048         /* We explicitly don't free resources here because the hardware is
3049          * still active and can DMA into memory. Resources are cleared in
3050          * i40evf_virtchnl_completion() after we get confirmation from the PF
3051          * driver that the rings have been stopped.
3052          *
3053          * Also, we wait for state to transition to __I40EVF_DOWN before
3054          * returning. State change occurs in i40evf_virtchnl_completion() after
3055          * VF resources are released (which occurs after PF driver processes and
3056          * responds to admin queue commands).
3057          */
3058
3059         status = wait_event_timeout(adapter->down_waitqueue,
3060                                     adapter->state == __I40EVF_DOWN,
3061                                     msecs_to_jiffies(200));
3062         if (!status)
3063                 netdev_warn(netdev, "Device resources not yet released\n");
3064         return 0;
3065 }
3066
3067 /**
3068  * i40evf_change_mtu - Change the Maximum Transfer Unit
3069  * @netdev: network interface device structure
3070  * @new_mtu: new value for maximum frame size
3071  *
3072  * Returns 0 on success, negative on failure
3073  **/
3074 static int i40evf_change_mtu(struct net_device *netdev, int new_mtu)
3075 {
3076         struct i40evf_adapter *adapter = netdev_priv(netdev);
3077
3078         netdev->mtu = new_mtu;
3079         if (CLIENT_ENABLED(adapter)) {
3080                 i40evf_notify_client_l2_params(&adapter->vsi);
3081                 adapter->flags |= I40EVF_FLAG_SERVICE_CLIENT_REQUESTED;
3082         }
3083         adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
3084         schedule_work(&adapter->reset_task);
3085
3086         return 0;
3087 }
3088
3089 /**
3090  * i40e_set_features - set the netdev feature flags
3091  * @netdev: ptr to the netdev being adjusted
3092  * @features: the feature set that the stack is suggesting
3093  * Note: expects to be called while under rtnl_lock()
3094  **/
3095 static int i40evf_set_features(struct net_device *netdev,
3096                                netdev_features_t features)
3097 {
3098         struct i40evf_adapter *adapter = netdev_priv(netdev);
3099
3100         /* Don't allow changing VLAN_RX flag when adapter is not capable
3101          * of VLAN offload
3102          */
3103         if (!VLAN_ALLOWED(adapter)) {
3104                 if ((netdev->features ^ features) & NETIF_F_HW_VLAN_CTAG_RX)
3105                         return -EINVAL;
3106         } else if ((netdev->features ^ features) & NETIF_F_HW_VLAN_CTAG_RX) {
3107                 if (features & NETIF_F_HW_VLAN_CTAG_RX)
3108                         adapter->aq_required |=
3109                                 I40EVF_FLAG_AQ_ENABLE_VLAN_STRIPPING;
3110                 else
3111                         adapter->aq_required |=
3112                                 I40EVF_FLAG_AQ_DISABLE_VLAN_STRIPPING;
3113         }
3114
3115         return 0;
3116 }
3117
3118 /**
3119  * i40evf_features_check - Validate encapsulated packet conforms to limits
3120  * @skb: skb buff
3121  * @dev: This physical port's netdev
3122  * @features: Offload features that the stack believes apply
3123  **/
3124 static netdev_features_t i40evf_features_check(struct sk_buff *skb,
3125                                                struct net_device *dev,
3126                                                netdev_features_t features)
3127 {
3128         size_t len;
3129
3130         /* No point in doing any of this if neither checksum nor GSO are
3131          * being requested for this frame.  We can rule out both by just
3132          * checking for CHECKSUM_PARTIAL
3133          */
3134         if (skb->ip_summed != CHECKSUM_PARTIAL)
3135                 return features;
3136
3137         /* We cannot support GSO if the MSS is going to be less than
3138          * 64 bytes.  If it is then we need to drop support for GSO.
3139          */
3140         if (skb_is_gso(skb) && (skb_shinfo(skb)->gso_size < 64))
3141                 features &= ~NETIF_F_GSO_MASK;
3142
3143         /* MACLEN can support at most 63 words */
3144         len = skb_network_header(skb) - skb->data;
3145         if (len & ~(63 * 2))
3146                 goto out_err;
3147
3148         /* IPLEN and EIPLEN can support at most 127 dwords */
3149         len = skb_transport_header(skb) - skb_network_header(skb);
3150         if (len & ~(127 * 4))
3151                 goto out_err;
3152
3153         if (skb->encapsulation) {
3154                 /* L4TUNLEN can support 127 words */
3155                 len = skb_inner_network_header(skb) - skb_transport_header(skb);
3156                 if (len & ~(127 * 2))
3157                         goto out_err;
3158
3159                 /* IPLEN can support at most 127 dwords */
3160                 len = skb_inner_transport_header(skb) -
3161                       skb_inner_network_header(skb);
3162                 if (len & ~(127 * 4))
3163                         goto out_err;
3164         }
3165
3166         /* No need to validate L4LEN as TCP is the only protocol with a
3167          * a flexible value and we support all possible values supported
3168          * by TCP, which is at most 15 dwords
3169          */
3170
3171         return features;
3172 out_err:
3173         return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK);
3174 }
3175
3176 /**
3177  * i40evf_fix_features - fix up the netdev feature bits
3178  * @netdev: our net device
3179  * @features: desired feature bits
3180  *
3181  * Returns fixed-up features bits
3182  **/
3183 static netdev_features_t i40evf_fix_features(struct net_device *netdev,
3184                                              netdev_features_t features)
3185 {
3186         struct i40evf_adapter *adapter = netdev_priv(netdev);
3187
3188         if (adapter->vf_res &&
3189             !(adapter->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_VLAN))
3190                 features &= ~(NETIF_F_HW_VLAN_CTAG_TX |
3191                               NETIF_F_HW_VLAN_CTAG_RX |
3192                               NETIF_F_HW_VLAN_CTAG_FILTER);
3193
3194         return features;
3195 }
3196
3197 static const struct net_device_ops i40evf_netdev_ops = {
3198         .ndo_open               = i40evf_open,
3199         .ndo_stop               = i40evf_close,
3200         .ndo_start_xmit         = i40evf_xmit_frame,
3201         .ndo_set_rx_mode        = i40evf_set_rx_mode,
3202         .ndo_validate_addr      = eth_validate_addr,
3203         .ndo_set_mac_address    = i40evf_set_mac,
3204         .ndo_change_mtu         = i40evf_change_mtu,
3205         .ndo_tx_timeout         = i40evf_tx_timeout,
3206         .ndo_vlan_rx_add_vid    = i40evf_vlan_rx_add_vid,
3207         .ndo_vlan_rx_kill_vid   = i40evf_vlan_rx_kill_vid,
3208         .ndo_features_check     = i40evf_features_check,
3209         .ndo_fix_features       = i40evf_fix_features,
3210         .ndo_set_features       = i40evf_set_features,
3211         .ndo_setup_tc           = i40evf_setup_tc,
3212 };
3213
3214 /**
3215  * i40evf_check_reset_complete - check that VF reset is complete
3216  * @hw: pointer to hw struct
3217  *
3218  * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
3219  **/
3220 static int i40evf_check_reset_complete(struct i40e_hw *hw)
3221 {
3222         u32 rstat;
3223         int i;
3224
3225         for (i = 0; i < 100; i++) {
3226                 rstat = rd32(hw, I40E_VFGEN_RSTAT) &
3227                             I40E_VFGEN_RSTAT_VFR_STATE_MASK;
3228                 if ((rstat == VIRTCHNL_VFR_VFACTIVE) ||
3229                     (rstat == VIRTCHNL_VFR_COMPLETED))
3230                         return 0;
3231                 usleep_range(10, 20);
3232         }
3233         return -EBUSY;
3234 }
3235
3236 /**
3237  * i40evf_process_config - Process the config information we got from the PF
3238  * @adapter: board private structure
3239  *
3240  * Verify that we have a valid config struct, and set up our netdev features
3241  * and our VSI struct.
3242  **/
3243 int i40evf_process_config(struct i40evf_adapter *adapter)
3244 {
3245         struct virtchnl_vf_resource *vfres = adapter->vf_res;
3246         int i, num_req_queues = adapter->num_req_queues;
3247         struct net_device *netdev = adapter->netdev;
3248         struct i40e_vsi *vsi = &adapter->vsi;
3249         netdev_features_t hw_enc_features;
3250         netdev_features_t hw_features;
3251
3252         /* got VF config message back from PF, now we can parse it */
3253         for (i = 0; i < vfres->num_vsis; i++) {
3254                 if (vfres->vsi_res[i].vsi_type == VIRTCHNL_VSI_SRIOV)
3255                         adapter->vsi_res = &vfres->vsi_res[i];
3256         }
3257         if (!adapter->vsi_res) {
3258                 dev_err(&adapter->pdev->dev, "No LAN VSI found\n");
3259                 return -ENODEV;
3260         }
3261
3262         if (num_req_queues &&
3263             num_req_queues != adapter->vsi_res->num_queue_pairs) {
3264                 /* Problem.  The PF gave us fewer queues than what we had
3265                  * negotiated in our request.  Need a reset to see if we can't
3266                  * get back to a working state.
3267                  */
3268                 dev_err(&adapter->pdev->dev,
3269                         "Requested %d queues, but PF only gave us %d.\n",
3270                         num_req_queues,
3271                         adapter->vsi_res->num_queue_pairs);
3272                 adapter->flags |= I40EVF_FLAG_REINIT_ITR_NEEDED;
3273                 adapter->num_req_queues = adapter->vsi_res->num_queue_pairs;
3274                 i40evf_schedule_reset(adapter);
3275                 return -ENODEV;
3276         }
3277         adapter->num_req_queues = 0;
3278
3279         hw_enc_features = NETIF_F_SG                    |
3280                           NETIF_F_IP_CSUM               |
3281                           NETIF_F_IPV6_CSUM             |
3282                           NETIF_F_HIGHDMA               |
3283                           NETIF_F_SOFT_FEATURES |
3284                           NETIF_F_TSO                   |
3285                           NETIF_F_TSO_ECN               |
3286                           NETIF_F_TSO6                  |
3287                           NETIF_F_SCTP_CRC              |
3288                           NETIF_F_RXHASH                |
3289                           NETIF_F_RXCSUM                |
3290                           0;
3291
3292         /* advertise to stack only if offloads for encapsulated packets is
3293          * supported
3294          */
3295         if (vfres->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_ENCAP) {
3296                 hw_enc_features |= NETIF_F_GSO_UDP_TUNNEL       |
3297                                    NETIF_F_GSO_GRE              |
3298                                    NETIF_F_GSO_GRE_CSUM         |
3299                                    NETIF_F_GSO_IPXIP4           |
3300                                    NETIF_F_GSO_IPXIP6           |
3301                                    NETIF_F_GSO_UDP_TUNNEL_CSUM  |
3302                                    NETIF_F_GSO_PARTIAL          |
3303                                    0;
3304
3305                 if (!(vfres->vf_cap_flags &
3306                       VIRTCHNL_VF_OFFLOAD_ENCAP_CSUM))
3307                         netdev->gso_partial_features |=
3308                                 NETIF_F_GSO_UDP_TUNNEL_CSUM;
3309
3310                 netdev->gso_partial_features |= NETIF_F_GSO_GRE_CSUM;
3311                 netdev->hw_enc_features |= NETIF_F_TSO_MANGLEID;
3312                 netdev->hw_enc_features |= hw_enc_features;
3313         }
3314         /* record features VLANs can make use of */
3315         netdev->vlan_features |= hw_enc_features | NETIF_F_TSO_MANGLEID;
3316
3317         /* Write features and hw_features separately to avoid polluting
3318          * with, or dropping, features that are set when we registered.
3319          */
3320         hw_features = hw_enc_features;
3321
3322         /* Enable VLAN features if supported */
3323         if (vfres->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_VLAN)
3324                 hw_features |= (NETIF_F_HW_VLAN_CTAG_TX |
3325                                 NETIF_F_HW_VLAN_CTAG_RX);
3326         /* Enable cloud filter if ADQ is supported */
3327         if (vfres->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_ADQ)
3328                 hw_features |= NETIF_F_HW_TC;
3329
3330         netdev->hw_features |= hw_features;
3331
3332         netdev->features |= hw_features;
3333
3334         if (vfres->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_VLAN)
3335                 netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
3336
3337         netdev->priv_flags |= IFF_UNICAST_FLT;
3338
3339         /* Do not turn on offloads when they are requested to be turned off.
3340          * TSO needs minimum 576 bytes to work correctly.
3341          */
3342         if (netdev->wanted_features) {
3343                 if (!(netdev->wanted_features & NETIF_F_TSO) ||
3344                     netdev->mtu < 576)
3345                         netdev->features &= ~NETIF_F_TSO;
3346                 if (!(netdev->wanted_features & NETIF_F_TSO6) ||
3347                     netdev->mtu < 576)
3348                         netdev->features &= ~NETIF_F_TSO6;
3349                 if (!(netdev->wanted_features & NETIF_F_TSO_ECN))
3350                         netdev->features &= ~NETIF_F_TSO_ECN;
3351                 if (!(netdev->wanted_features & NETIF_F_GRO))
3352                         netdev->features &= ~NETIF_F_GRO;
3353                 if (!(netdev->wanted_features & NETIF_F_GSO))
3354                         netdev->features &= ~NETIF_F_GSO;
3355         }
3356
3357         adapter->vsi.id = adapter->vsi_res->vsi_id;
3358
3359         adapter->vsi.back = adapter;
3360         adapter->vsi.base_vector = 1;
3361         adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
3362         vsi->netdev = adapter->netdev;
3363         vsi->qs_handle = adapter->vsi_res->qset_handle;
3364         if (vfres->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_RSS_PF) {
3365                 adapter->rss_key_size = vfres->rss_key_size;
3366                 adapter->rss_lut_size = vfres->rss_lut_size;
3367         } else {
3368                 adapter->rss_key_size = I40EVF_HKEY_ARRAY_SIZE;
3369                 adapter->rss_lut_size = I40EVF_HLUT_ARRAY_SIZE;
3370         }
3371
3372         return 0;
3373 }
3374
3375 /**
3376  * i40evf_init_task - worker thread to perform delayed initialization
3377  * @work: pointer to work_struct containing our data
3378  *
3379  * This task completes the work that was begun in probe. Due to the nature
3380  * of VF-PF communications, we may need to wait tens of milliseconds to get
3381  * responses back from the PF. Rather than busy-wait in probe and bog down the
3382  * whole system, we'll do it in a task so we can sleep.
3383  * This task only runs during driver init. Once we've established
3384  * communications with the PF driver and set up our netdev, the watchdog
3385  * takes over.
3386  **/
3387 static void i40evf_init_task(struct work_struct *work)
3388 {
3389         struct i40evf_adapter *adapter = container_of(work,
3390                                                       struct i40evf_adapter,
3391                                                       init_task.work);
3392         struct net_device *netdev = adapter->netdev;
3393         struct i40e_hw *hw = &adapter->hw;
3394         struct pci_dev *pdev = adapter->pdev;
3395         int err, bufsz;
3396
3397         switch (adapter->state) {
3398         case __I40EVF_STARTUP:
3399                 /* driver loaded, probe complete */
3400                 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
3401                 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
3402                 err = i40e_set_mac_type(hw);
3403                 if (err) {
3404                         dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
3405                                 err);
3406                         goto err;
3407                 }
3408                 err = i40evf_check_reset_complete(hw);
3409                 if (err) {
3410                         dev_info(&pdev->dev, "Device is still in reset (%d), retrying\n",
3411                                  err);
3412                         goto err;
3413                 }
3414                 hw->aq.num_arq_entries = I40EVF_AQ_LEN;
3415                 hw->aq.num_asq_entries = I40EVF_AQ_LEN;
3416                 hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
3417                 hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
3418
3419                 err = i40evf_init_adminq(hw);
3420                 if (err) {
3421                         dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
3422                                 err);
3423                         goto err;
3424                 }
3425                 err = i40evf_send_api_ver(adapter);
3426                 if (err) {
3427                         dev_err(&pdev->dev, "Unable to send to PF (%d)\n", err);
3428                         i40evf_shutdown_adminq(hw);
3429                         goto err;
3430                 }
3431                 adapter->state = __I40EVF_INIT_VERSION_CHECK;
3432                 goto restart;
3433         case __I40EVF_INIT_VERSION_CHECK:
3434                 if (!i40evf_asq_done(hw)) {
3435                         dev_err(&pdev->dev, "Admin queue command never completed\n");
3436                         i40evf_shutdown_adminq(hw);
3437                         adapter->state = __I40EVF_STARTUP;
3438                         goto err;
3439                 }
3440
3441                 /* aq msg sent, awaiting reply */
3442                 err = i40evf_verify_api_ver(adapter);
3443                 if (err) {
3444                         if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
3445                                 err = i40evf_send_api_ver(adapter);
3446                         else
3447                                 dev_err(&pdev->dev, "Unsupported PF API version %d.%d, expected %d.%d\n",
3448                                         adapter->pf_version.major,
3449                                         adapter->pf_version.minor,
3450                                         VIRTCHNL_VERSION_MAJOR,
3451                                         VIRTCHNL_VERSION_MINOR);
3452                         goto err;
3453                 }
3454                 err = i40evf_send_vf_config_msg(adapter);
3455                 if (err) {
3456                         dev_err(&pdev->dev, "Unable to send config request (%d)\n",
3457                                 err);
3458                         goto err;
3459                 }
3460                 adapter->state = __I40EVF_INIT_GET_RESOURCES;
3461                 goto restart;
3462         case __I40EVF_INIT_GET_RESOURCES:
3463                 /* aq msg sent, awaiting reply */
3464                 if (!adapter->vf_res) {
3465                         bufsz = sizeof(struct virtchnl_vf_resource) +
3466                                 (I40E_MAX_VF_VSI *
3467                                  sizeof(struct virtchnl_vsi_resource));
3468                         adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
3469                         if (!adapter->vf_res)
3470                                 goto err;
3471                 }
3472                 err = i40evf_get_vf_config(adapter);
3473                 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK) {
3474                         err = i40evf_send_vf_config_msg(adapter);
3475                         goto err;
3476                 } else if (err == I40E_ERR_PARAM) {
3477                         /* We only get ERR_PARAM if the device is in a very bad
3478                          * state or if we've been disabled for previous bad
3479                          * behavior. Either way, we're done now.
3480                          */
3481                         i40evf_shutdown_adminq(hw);
3482                         dev_err(&pdev->dev, "Unable to get VF config due to PF error condition, not retrying\n");
3483                         return;
3484                 }
3485                 if (err) {
3486                         dev_err(&pdev->dev, "Unable to get VF config (%d)\n",
3487                                 err);
3488                         goto err_alloc;
3489                 }
3490                 adapter->state = __I40EVF_INIT_SW;
3491                 break;
3492         default:
3493                 goto err_alloc;
3494         }
3495
3496         if (i40evf_process_config(adapter))
3497                 goto err_alloc;
3498         adapter->current_op = VIRTCHNL_OP_UNKNOWN;
3499
3500         adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
3501
3502         netdev->netdev_ops = &i40evf_netdev_ops;
3503         i40evf_set_ethtool_ops(netdev);
3504         netdev->watchdog_timeo = 5 * HZ;
3505
3506         /* MTU range: 68 - 9710 */
3507         netdev->min_mtu = ETH_MIN_MTU;
3508         netdev->max_mtu = I40E_MAX_RXBUFFER - I40E_PACKET_HDR_PAD;
3509
3510         if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
3511                 dev_info(&pdev->dev, "Invalid MAC address %pM, using random\n",
3512                          adapter->hw.mac.addr);
3513                 eth_hw_addr_random(netdev);
3514                 ether_addr_copy(adapter->hw.mac.addr, netdev->dev_addr);
3515         } else {
3516                 adapter->flags |= I40EVF_FLAG_ADDR_SET_BY_PF;
3517                 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
3518                 ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
3519         }
3520
3521         timer_setup(&adapter->watchdog_timer, i40evf_watchdog_timer, 0);
3522         mod_timer(&adapter->watchdog_timer, jiffies + 1);
3523
3524         adapter->tx_desc_count = I40EVF_DEFAULT_TXD;
3525         adapter->rx_desc_count = I40EVF_DEFAULT_RXD;
3526         err = i40evf_init_interrupt_scheme(adapter);
3527         if (err)
3528                 goto err_sw_init;
3529         i40evf_map_rings_to_vectors(adapter);
3530         if (adapter->vf_res->vf_cap_flags &
3531             VIRTCHNL_VF_OFFLOAD_WB_ON_ITR)
3532                 adapter->flags |= I40EVF_FLAG_WB_ON_ITR_CAPABLE;
3533
3534         err = i40evf_request_misc_irq(adapter);
3535         if (err)
3536                 goto err_sw_init;
3537
3538         netif_carrier_off(netdev);
3539         adapter->link_up = false;
3540
3541         if (!adapter->netdev_registered) {
3542                 err = register_netdev(netdev);
3543                 if (err)
3544                         goto err_register;
3545         }
3546
3547         adapter->netdev_registered = true;
3548
3549         netif_tx_stop_all_queues(netdev);
3550         if (CLIENT_ALLOWED(adapter)) {
3551                 err = i40evf_lan_add_device(adapter);
3552                 if (err)
3553                         dev_info(&pdev->dev, "Failed to add VF to client API service list: %d\n",
3554                                  err);
3555         }
3556
3557         dev_info(&pdev->dev, "MAC address: %pM\n", adapter->hw.mac.addr);
3558         if (netdev->features & NETIF_F_GRO)
3559                 dev_info(&pdev->dev, "GRO is enabled\n");
3560
3561         adapter->state = __I40EVF_DOWN;
3562         set_bit(__I40E_VSI_DOWN, adapter->vsi.state);
3563         i40evf_misc_irq_enable(adapter);
3564         wake_up(&adapter->down_waitqueue);
3565
3566         adapter->rss_key = kzalloc(adapter->rss_key_size, GFP_KERNEL);
3567         adapter->rss_lut = kzalloc(adapter->rss_lut_size, GFP_KERNEL);
3568         if (!adapter->rss_key || !adapter->rss_lut)
3569                 goto err_mem;
3570
3571         if (RSS_AQ(adapter)) {
3572                 adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_RSS;
3573                 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
3574         } else {
3575                 i40evf_init_rss(adapter);
3576         }
3577         return;
3578 restart:
3579         schedule_delayed_work(&adapter->init_task, msecs_to_jiffies(30));
3580         return;
3581 err_mem:
3582         i40evf_free_rss(adapter);
3583 err_register:
3584         i40evf_free_misc_irq(adapter);
3585 err_sw_init:
3586         i40evf_reset_interrupt_capability(adapter);
3587 err_alloc:
3588         kfree(adapter->vf_res);
3589         adapter->vf_res = NULL;
3590 err:
3591         /* Things went into the weeds, so try again later */
3592         if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
3593                 dev_err(&pdev->dev, "Failed to communicate with PF; waiting before retry\n");
3594                 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
3595                 i40evf_shutdown_adminq(hw);
3596                 adapter->state = __I40EVF_STARTUP;
3597                 schedule_delayed_work(&adapter->init_task, HZ * 5);
3598                 return;
3599         }
3600         schedule_delayed_work(&adapter->init_task, HZ);
3601 }
3602
3603 /**
3604  * i40evf_shutdown - Shutdown the device in preparation for a reboot
3605  * @pdev: pci device structure
3606  **/
3607 static void i40evf_shutdown(struct pci_dev *pdev)
3608 {
3609         struct net_device *netdev = pci_get_drvdata(pdev);
3610         struct i40evf_adapter *adapter = netdev_priv(netdev);
3611
3612         netif_device_detach(netdev);
3613
3614         if (netif_running(netdev))
3615                 i40evf_close(netdev);
3616
3617         /* Prevent the watchdog from running. */
3618         adapter->state = __I40EVF_REMOVE;
3619         adapter->aq_required = 0;
3620
3621 #ifdef CONFIG_PM
3622         pci_save_state(pdev);
3623
3624 #endif
3625         pci_disable_device(pdev);
3626 }
3627
3628 /**
3629  * i40evf_probe - Device Initialization Routine
3630  * @pdev: PCI device information struct
3631  * @ent: entry in i40evf_pci_tbl
3632  *
3633  * Returns 0 on success, negative on failure
3634  *
3635  * i40evf_probe initializes an adapter identified by a pci_dev structure.
3636  * The OS initialization, configuring of the adapter private structure,
3637  * and a hardware reset occur.
3638  **/
3639 static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3640 {
3641         struct net_device *netdev;
3642         struct i40evf_adapter *adapter = NULL;
3643         struct i40e_hw *hw = NULL;
3644         int err;
3645
3646         err = pci_enable_device(pdev);
3647         if (err)
3648                 return err;
3649
3650         err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
3651         if (err) {
3652                 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
3653                 if (err) {
3654                         dev_err(&pdev->dev,
3655                                 "DMA configuration failed: 0x%x\n", err);
3656                         goto err_dma;
3657                 }
3658         }
3659
3660         err = pci_request_regions(pdev, i40evf_driver_name);
3661         if (err) {
3662                 dev_err(&pdev->dev,
3663                         "pci_request_regions failed 0x%x\n", err);
3664                 goto err_pci_reg;
3665         }
3666
3667         pci_enable_pcie_error_reporting(pdev);
3668
3669         pci_set_master(pdev);
3670
3671         netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter),
3672                                    I40EVF_MAX_REQ_QUEUES);
3673         if (!netdev) {
3674                 err = -ENOMEM;
3675                 goto err_alloc_etherdev;
3676         }
3677
3678         SET_NETDEV_DEV(netdev, &pdev->dev);
3679
3680         pci_set_drvdata(pdev, netdev);
3681         adapter = netdev_priv(netdev);
3682
3683         adapter->netdev = netdev;
3684         adapter->pdev = pdev;
3685
3686         hw = &adapter->hw;
3687         hw->back = adapter;
3688
3689         adapter->msg_enable = BIT(DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
3690         adapter->state = __I40EVF_STARTUP;
3691
3692         /* Call save state here because it relies on the adapter struct. */
3693         pci_save_state(pdev);
3694
3695         hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
3696                               pci_resource_len(pdev, 0));
3697         if (!hw->hw_addr) {
3698                 err = -EIO;
3699                 goto err_ioremap;
3700         }
3701         hw->vendor_id = pdev->vendor;
3702         hw->device_id = pdev->device;
3703         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
3704         hw->subsystem_vendor_id = pdev->subsystem_vendor;
3705         hw->subsystem_device_id = pdev->subsystem_device;
3706         hw->bus.device = PCI_SLOT(pdev->devfn);
3707         hw->bus.func = PCI_FUNC(pdev->devfn);
3708         hw->bus.bus_id = pdev->bus->number;
3709
3710         /* set up the locks for the AQ, do this only once in probe
3711          * and destroy them only once in remove
3712          */
3713         mutex_init(&hw->aq.asq_mutex);
3714         mutex_init(&hw->aq.arq_mutex);
3715
3716         spin_lock_init(&adapter->mac_vlan_list_lock);
3717         spin_lock_init(&adapter->cloud_filter_list_lock);
3718
3719         INIT_LIST_HEAD(&adapter->mac_filter_list);
3720         INIT_LIST_HEAD(&adapter->vlan_filter_list);
3721         INIT_LIST_HEAD(&adapter->cloud_filter_list);
3722
3723         INIT_WORK(&adapter->reset_task, i40evf_reset_task);
3724         INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
3725         INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
3726         INIT_DELAYED_WORK(&adapter->client_task, i40evf_client_task);
3727         INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
3728         schedule_delayed_work(&adapter->init_task,
3729                               msecs_to_jiffies(5 * (pdev->devfn & 0x07)));
3730
3731         /* Setup the wait queue for indicating transition to down status */
3732         init_waitqueue_head(&adapter->down_waitqueue);
3733
3734         return 0;
3735
3736 err_ioremap:
3737         free_netdev(netdev);
3738 err_alloc_etherdev:
3739         pci_disable_pcie_error_reporting(pdev);
3740         pci_release_regions(pdev);
3741 err_pci_reg:
3742 err_dma:
3743         pci_disable_device(pdev);
3744         return err;
3745 }
3746
3747 #ifdef CONFIG_PM
3748 /**
3749  * i40evf_suspend - Power management suspend routine
3750  * @pdev: PCI device information struct
3751  * @state: unused
3752  *
3753  * Called when the system (VM) is entering sleep/suspend.
3754  **/
3755 static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
3756 {
3757         struct net_device *netdev = pci_get_drvdata(pdev);
3758         struct i40evf_adapter *adapter = netdev_priv(netdev);
3759         int retval = 0;
3760
3761         netif_device_detach(netdev);
3762
3763         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
3764                                 &adapter->crit_section))
3765                 usleep_range(500, 1000);
3766
3767         if (netif_running(netdev)) {
3768                 rtnl_lock();
3769                 i40evf_down(adapter);
3770                 rtnl_unlock();
3771         }
3772         i40evf_free_misc_irq(adapter);
3773         i40evf_reset_interrupt_capability(adapter);
3774
3775         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
3776
3777         retval = pci_save_state(pdev);
3778         if (retval)
3779                 return retval;
3780
3781         pci_disable_device(pdev);
3782
3783         return 0;
3784 }
3785
3786 /**
3787  * i40evf_resume - Power management resume routine
3788  * @pdev: PCI device information struct
3789  *
3790  * Called when the system (VM) is resumed from sleep/suspend.
3791  **/
3792 static int i40evf_resume(struct pci_dev *pdev)
3793 {
3794         struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
3795         struct net_device *netdev = adapter->netdev;
3796         u32 err;
3797
3798         pci_set_power_state(pdev, PCI_D0);
3799         pci_restore_state(pdev);
3800         /* pci_restore_state clears dev->state_saved so call
3801          * pci_save_state to restore it.
3802          */
3803         pci_save_state(pdev);
3804
3805         err = pci_enable_device_mem(pdev);
3806         if (err) {
3807                 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
3808                 return err;
3809         }
3810         pci_set_master(pdev);
3811
3812         rtnl_lock();
3813         err = i40evf_set_interrupt_capability(adapter);
3814         if (err) {
3815                 rtnl_unlock();
3816                 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
3817                 return err;
3818         }
3819         err = i40evf_request_misc_irq(adapter);
3820         rtnl_unlock();
3821         if (err) {
3822                 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
3823                 return err;
3824         }
3825
3826         schedule_work(&adapter->reset_task);
3827
3828         netif_device_attach(netdev);
3829
3830         return err;
3831 }
3832
3833 #endif /* CONFIG_PM */
3834 /**
3835  * i40evf_remove - Device Removal Routine
3836  * @pdev: PCI device information struct
3837  *
3838  * i40evf_remove is called by the PCI subsystem to alert the driver
3839  * that it should release a PCI device.  The could be caused by a
3840  * Hot-Plug event, or because the driver is going to be removed from
3841  * memory.
3842  **/
3843 static void i40evf_remove(struct pci_dev *pdev)
3844 {
3845         struct net_device *netdev = pci_get_drvdata(pdev);
3846         struct i40evf_adapter *adapter = netdev_priv(netdev);
3847         struct i40evf_vlan_filter *vlf, *vlftmp;
3848         struct i40evf_mac_filter *f, *ftmp;
3849         struct i40evf_cloud_filter *cf, *cftmp;
3850         struct i40e_hw *hw = &adapter->hw;
3851         int err;
3852         /* Indicate we are in remove and not to run reset_task */
3853         set_bit(__I40EVF_IN_REMOVE_TASK, &adapter->crit_section);
3854         cancel_delayed_work_sync(&adapter->init_task);
3855         cancel_work_sync(&adapter->reset_task);
3856         cancel_delayed_work_sync(&adapter->client_task);
3857         if (adapter->netdev_registered) {
3858                 unregister_netdev(netdev);
3859                 adapter->netdev_registered = false;
3860         }
3861         if (CLIENT_ALLOWED(adapter)) {
3862                 err = i40evf_lan_del_device(adapter);
3863                 if (err)
3864                         dev_warn(&pdev->dev, "Failed to delete client device: %d\n",
3865                                  err);
3866         }
3867
3868         /* Shut down all the garbage mashers on the detention level */
3869         adapter->state = __I40EVF_REMOVE;
3870         adapter->aq_required = 0;
3871         adapter->flags &= ~I40EVF_FLAG_REINIT_ITR_NEEDED;
3872         i40evf_request_reset(adapter);
3873         msleep(50);
3874         /* If the FW isn't responding, kick it once, but only once. */
3875         if (!i40evf_asq_done(hw)) {
3876                 i40evf_request_reset(adapter);
3877                 msleep(50);
3878         }
3879         i40evf_free_all_tx_resources(adapter);
3880         i40evf_free_all_rx_resources(adapter);
3881         i40evf_misc_irq_disable(adapter);
3882         i40evf_free_misc_irq(adapter);
3883         i40evf_reset_interrupt_capability(adapter);
3884         i40evf_free_q_vectors(adapter);
3885
3886         if (adapter->watchdog_timer.function)
3887                 del_timer_sync(&adapter->watchdog_timer);
3888
3889         cancel_work_sync(&adapter->adminq_task);
3890
3891         i40evf_free_rss(adapter);
3892
3893         if (hw->aq.asq.count)
3894                 i40evf_shutdown_adminq(hw);
3895
3896         /* destroy the locks only once, here */
3897         mutex_destroy(&hw->aq.arq_mutex);
3898         mutex_destroy(&hw->aq.asq_mutex);
3899
3900         iounmap(hw->hw_addr);
3901         pci_release_regions(pdev);
3902         i40evf_free_all_tx_resources(adapter);
3903         i40evf_free_all_rx_resources(adapter);
3904         i40evf_free_queues(adapter);
3905         kfree(adapter->vf_res);
3906         spin_lock_bh(&adapter->mac_vlan_list_lock);
3907         /* If we got removed before an up/down sequence, we've got a filter
3908          * hanging out there that we need to get rid of.
3909          */
3910         list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
3911                 list_del(&f->list);
3912                 kfree(f);
3913         }
3914         list_for_each_entry_safe(vlf, vlftmp, &adapter->vlan_filter_list,
3915                                  list) {
3916                 list_del(&vlf->list);
3917                 kfree(vlf);
3918         }
3919
3920         spin_unlock_bh(&adapter->mac_vlan_list_lock);
3921
3922         spin_lock_bh(&adapter->cloud_filter_list_lock);
3923         list_for_each_entry_safe(cf, cftmp, &adapter->cloud_filter_list, list) {
3924                 list_del(&cf->list);
3925                 kfree(cf);
3926         }
3927         spin_unlock_bh(&adapter->cloud_filter_list_lock);
3928
3929         free_netdev(netdev);
3930
3931         pci_disable_pcie_error_reporting(pdev);
3932
3933         pci_disable_device(pdev);
3934 }
3935
3936 static struct pci_driver i40evf_driver = {
3937         .name     = i40evf_driver_name,
3938         .id_table = i40evf_pci_tbl,
3939         .probe    = i40evf_probe,
3940         .remove   = i40evf_remove,
3941 #ifdef CONFIG_PM
3942         .suspend  = i40evf_suspend,
3943         .resume   = i40evf_resume,
3944 #endif
3945         .shutdown = i40evf_shutdown,
3946 };
3947
3948 /**
3949  * i40e_init_module - Driver Registration Routine
3950  *
3951  * i40e_init_module is the first routine called when the driver is
3952  * loaded. All it does is register with the PCI subsystem.
3953  **/
3954 static int __init i40evf_init_module(void)
3955 {
3956         int ret;
3957
3958         pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
3959                 i40evf_driver_version);
3960
3961         pr_info("%s\n", i40evf_copyright);
3962
3963         i40evf_wq = alloc_workqueue("%s", WQ_UNBOUND | WQ_MEM_RECLAIM, 1,
3964                                     i40evf_driver_name);
3965         if (!i40evf_wq) {
3966                 pr_err("%s: Failed to create workqueue\n", i40evf_driver_name);
3967                 return -ENOMEM;
3968         }
3969         ret = pci_register_driver(&i40evf_driver);
3970         return ret;
3971 }
3972
3973 module_init(i40evf_init_module);
3974
3975 /**
3976  * i40e_exit_module - Driver Exit Cleanup Routine
3977  *
3978  * i40e_exit_module is called just before the driver is removed
3979  * from memory.
3980  **/
3981 static void __exit i40evf_exit_module(void)
3982 {
3983         pci_unregister_driver(&i40evf_driver);
3984         destroy_workqueue(i40evf_wq);
3985 }
3986
3987 module_exit(i40evf_exit_module);
3988
3989 /* i40evf_main.c */