drivers/net/ethernet/intel/iavf/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) Ethernet Adaptive Virtual Function Network Driver";
  21
  22 #define DRV_KERN "-k"
  23
  24 #define DRV_VERSION_MAJOR 3
  25 #define DRV_VERSION_MINOR 2
  26 #define DRV_VERSION_BUILD 3
  27 #define DRV_VERSION __stringify(DRV_VERSION_MAJOR) "." \
  28              __stringify(DRV_VERSION_MINOR) "." \
  29              __stringify(DRV_VERSION_BUILD) \
  30              DRV_KERN
  31 const char i40evf_driver_version[] = DRV_VERSION;
  32 static const char i40evf_copyright[] =
  33         "Copyright (c) 2013 - 2018 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_ALIAS("i40evf");
  55 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
  56 MODULE_DESCRIPTION("Intel(R) XL710 X710 Virtual Function Network Driver");
  57 MODULE_LICENSE("GPL");
  58 MODULE_VERSION(DRV_VERSION);
  59
  60 static struct workqueue_struct *i40evf_wq;
  61
  62 /**
  63  * i40evf_allocate_dma_mem_d - OS specific memory alloc for shared code
  64  * @hw:   pointer to the HW structure
  65  * @mem:  ptr to mem struct to fill out
  66  * @size: size of memory requested
  67  * @alignment: what to align the allocation to
  68  **/
  69 i40e_status i40evf_allocate_dma_mem_d(struct i40e_hw *hw,
  70                                       struct i40e_dma_mem *mem,
  71                                       u64 size, u32 alignment)
  72 {
  73         struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
  74
  75         if (!mem)
  76                 return I40E_ERR_PARAM;
  77
  78         mem->size = ALIGN(size, alignment);
  79         mem->va = dma_alloc_coherent(&adapter->pdev->dev, mem->size,
  80                                      (dma_addr_t *)&mem->pa, GFP_KERNEL);
  81         if (mem->va)
  82                 return 0;
  83         else
  84                 return I40E_ERR_NO_MEMORY;
  85 }
  86
  87 /**
  88  * i40evf_free_dma_mem_d - OS specific memory free for shared code
  89  * @hw:   pointer to the HW structure
  90  * @mem:  ptr to mem struct to free
  91  **/
  92 i40e_status i40evf_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem)
  93 {
  94         struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
  95
  96         if (!mem || !mem->va)
  97                 return I40E_ERR_PARAM;
  98         dma_free_coherent(&adapter->pdev->dev, mem->size,
  99                           mem->va, (dma_addr_t)mem->pa);
 100         return 0;
 101 }
 102
 103 /**
 104  * i40evf_allocate_virt_mem_d - OS specific memory alloc for shared code
 105  * @hw:   pointer to the HW structure
 106  * @mem:  ptr to mem struct to fill out
 107  * @size: size of memory requested
 108  **/
 109 i40e_status i40evf_allocate_virt_mem_d(struct i40e_hw *hw,
 110                                        struct i40e_virt_mem *mem, u32 size)
 111 {
 112         if (!mem)
 113                 return I40E_ERR_PARAM;
 114
 115         mem->size = size;
 116         mem->va = kzalloc(size, GFP_KERNEL);
 117
 118         if (mem->va)
 119                 return 0;
 120         else
 121                 return I40E_ERR_NO_MEMORY;
 122 }
 123
 124 /**
 125  * i40evf_free_virt_mem_d - OS specific memory free for shared code
 126  * @hw:   pointer to the HW structure
 127  * @mem:  ptr to mem struct to free
 128  **/
 129 i40e_status i40evf_free_virt_mem_d(struct i40e_hw *hw,
 130                                    struct i40e_virt_mem *mem)
 131 {
 132         if (!mem)
 133                 return I40E_ERR_PARAM;
 134
 135         /* it's ok to kfree a NULL pointer */
 136         kfree(mem->va);
 137
 138         return 0;
 139 }
 140
 141 /**
 142  * i40evf_debug_d - OS dependent version of debug printing
 143  * @hw:  pointer to the HW structure
 144  * @mask: debug level mask
 145  * @fmt_str: printf-type format description
 146  **/
 147 void i40evf_debug_d(void *hw, u32 mask, char *fmt_str, ...)
 148 {
 149         char buf[512];
 150         va_list argptr;
 151
 152         if (!(mask & ((struct i40e_hw *)hw)->debug_mask))
 153                 return;
 154
 155         va_start(argptr, fmt_str);
 156         vsnprintf(buf, sizeof(buf), fmt_str, argptr);
 157         va_end(argptr);
 158
 159         /* the debug string is already formatted with a newline */
 160         pr_info("%s", buf);
 161 }
 162
 163 /**
 164  * i40evf_schedule_reset - Set the flags and schedule a reset event
 165  * @adapter: board private structure
 166  **/
 167 void i40evf_schedule_reset(struct i40evf_adapter *adapter)
 168 {
 169         if (!(adapter->flags &
 170               (I40EVF_FLAG_RESET_PENDING | I40EVF_FLAG_RESET_NEEDED))) {
 171                 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
 172                 schedule_work(&adapter->reset_task);
 173         }
 174 }
 175
 176 /**
 177  * i40evf_tx_timeout - Respond to a Tx Hang
 178  * @netdev: network interface device structure
 179  **/
 180 static void i40evf_tx_timeout(struct net_device *netdev)
 181 {
 182         struct i40evf_adapter *adapter = netdev_priv(netdev);
 183
 184         adapter->tx_timeout_count++;
 185         i40evf_schedule_reset(adapter);
 186 }
 187
 188 /**
 189  * i40evf_misc_irq_disable - Mask off interrupt generation on the NIC
 190  * @adapter: board private structure
 191  **/
 192 static void i40evf_misc_irq_disable(struct i40evf_adapter *adapter)
 193 {
 194         struct i40e_hw *hw = &adapter->hw;
 195
 196         if (!adapter->msix_entries)
 197                 return;
 198
 199         wr32(hw, I40E_VFINT_DYN_CTL01, 0);
 200
 201         /* read flush */
 202         rd32(hw, I40E_VFGEN_RSTAT);
 203
 204         synchronize_irq(adapter->msix_entries[0].vector);
 205 }
 206
 207 /**
 208  * i40evf_misc_irq_enable - Enable default interrupt generation settings
 209  * @adapter: board private structure
 210  **/
 211 static void i40evf_misc_irq_enable(struct i40evf_adapter *adapter)
 212 {
 213         struct i40e_hw *hw = &adapter->hw;
 214
 215         wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK |
 216                                        I40E_VFINT_DYN_CTL01_ITR_INDX_MASK);
 217         wr32(hw, I40E_VFINT_ICR0_ENA1, I40E_VFINT_ICR0_ENA1_ADMINQ_MASK);
 218
 219         /* read flush */
 220         rd32(hw, I40E_VFGEN_RSTAT);
 221 }
 222
 223 /**
 224  * i40evf_irq_disable - Mask off interrupt generation on the NIC
 225  * @adapter: board private structure
 226  **/
 227 static void i40evf_irq_disable(struct i40evf_adapter *adapter)
 228 {
 229         int i;
 230         struct i40e_hw *hw = &adapter->hw;
 231
 232         if (!adapter->msix_entries)
 233                 return;
 234
 235         for (i = 1; i < adapter->num_msix_vectors; i++) {
 236                 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), 0);
 237                 synchronize_irq(adapter->msix_entries[i].vector);
 238         }
 239         /* read flush */
 240         rd32(hw, I40E_VFGEN_RSTAT);
 241 }
 242
 243 /**
 244  * i40evf_irq_enable_queues - Enable interrupt for specified queues
 245  * @adapter: board private structure
 246  * @mask: bitmap of queues to enable
 247  **/
 248 void i40evf_irq_enable_queues(struct i40evf_adapter *adapter, u32 mask)
 249 {
 250         struct i40e_hw *hw = &adapter->hw;
 251         int i;
 252
 253         for (i = 1; i < adapter->num_msix_vectors; i++) {
 254                 if (mask & BIT(i - 1)) {
 255                         wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1),
 256                              I40E_VFINT_DYN_CTLN1_INTENA_MASK |
 257                              I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK);
 258                 }
 259         }
 260 }
 261
 262 /**
 263  * i40evf_irq_enable - Enable default interrupt generation settings
 264  * @adapter: board private structure
 265  * @flush: boolean value whether to run rd32()
 266  **/
 267 void i40evf_irq_enable(struct i40evf_adapter *adapter, bool flush)
 268 {
 269         struct i40e_hw *hw = &adapter->hw;
 270
 271         i40evf_misc_irq_enable(adapter);
 272         i40evf_irq_enable_queues(adapter, ~0);
 273
 274         if (flush)
 275                 rd32(hw, I40E_VFGEN_RSTAT);
 276 }
 277
 278 /**
 279  * i40evf_msix_aq - Interrupt handler for vector 0
 280  * @irq: interrupt number
 281  * @data: pointer to netdev
 282  **/
 283 static irqreturn_t i40evf_msix_aq(int irq, void *data)
 284 {
 285         struct net_device *netdev = data;
 286         struct i40evf_adapter *adapter = netdev_priv(netdev);
 287         struct i40e_hw *hw = &adapter->hw;
 288
 289         /* handle non-queue interrupts, these reads clear the registers */
 290         rd32(hw, I40E_VFINT_ICR01);
 291         rd32(hw, I40E_VFINT_ICR0_ENA1);
 292
 293         /* schedule work on the private workqueue */
 294         schedule_work(&adapter->adminq_task);
 295
 296         return IRQ_HANDLED;
 297 }
 298
 299 /**
 300  * i40evf_msix_clean_rings - MSIX mode Interrupt Handler
 301  * @irq: interrupt number
 302  * @data: pointer to a q_vector
 303  **/
 304 static irqreturn_t i40evf_msix_clean_rings(int irq, void *data)
 305 {
 306         struct i40e_q_vector *q_vector = data;
 307
 308         if (!q_vector->tx.ring && !q_vector->rx.ring)
 309                 return IRQ_HANDLED;
 310
 311         napi_schedule_irqoff(&q_vector->napi);
 312
 313         return IRQ_HANDLED;
 314 }
 315
 316 /**
 317  * i40evf_map_vector_to_rxq - associate irqs with rx queues
 318  * @adapter: board private structure
 319  * @v_idx: interrupt number
 320  * @r_idx: queue number
 321  **/
 322 static void
 323 i40evf_map_vector_to_rxq(struct i40evf_adapter *adapter, int v_idx, int r_idx)
 324 {
 325         struct i40e_q_vector *q_vector = &adapter->q_vectors[v_idx];
 326         struct i40e_ring *rx_ring = &adapter->rx_rings[r_idx];
 327         struct i40e_hw *hw = &adapter->hw;
 328
 329         rx_ring->q_vector = q_vector;
 330         rx_ring->next = q_vector->rx.ring;
 331         rx_ring->vsi = &adapter->vsi;
 332         q_vector->rx.ring = rx_ring;
 333         q_vector->rx.count++;
 334         q_vector->rx.next_update = jiffies + 1;
 335         q_vector->rx.target_itr = ITR_TO_REG(rx_ring->itr_setting);
 336         q_vector->ring_mask |= BIT(r_idx);
 337         wr32(hw, I40E_VFINT_ITRN1(I40E_RX_ITR, q_vector->reg_idx),
 338              q_vector->rx.current_itr);
 339         q_vector->rx.current_itr = q_vector->rx.target_itr;
 340 }
 341
 342 /**
 343  * i40evf_map_vector_to_txq - associate irqs with tx queues
 344  * @adapter: board private structure
 345  * @v_idx: interrupt number
 346  * @t_idx: queue number
 347  **/
 348 static void
 349 i40evf_map_vector_to_txq(struct i40evf_adapter *adapter, int v_idx, int t_idx)
 350 {
 351         struct i40e_q_vector *q_vector = &adapter->q_vectors[v_idx];
 352         struct i40e_ring *tx_ring = &adapter->tx_rings[t_idx];
 353         struct i40e_hw *hw = &adapter->hw;
 354
 355         tx_ring->q_vector = q_vector;
 356         tx_ring->next = q_vector->tx.ring;
 357         tx_ring->vsi = &adapter->vsi;
 358         q_vector->tx.ring = tx_ring;
 359         q_vector->tx.count++;
 360         q_vector->tx.next_update = jiffies + 1;
 361         q_vector->tx.target_itr = ITR_TO_REG(tx_ring->itr_setting);
 362         q_vector->num_ringpairs++;
 363         wr32(hw, I40E_VFINT_ITRN1(I40E_TX_ITR, q_vector->reg_idx),
 364              q_vector->tx.target_itr);
 365         q_vector->tx.current_itr = q_vector->tx.target_itr;
 366 }
 367
 368 /**
 369  * i40evf_map_rings_to_vectors - Maps descriptor rings to vectors
 370  * @adapter: board private structure to initialize
 371  *
 372  * This function maps descriptor rings to the queue-specific vectors
 373  * we were allotted through the MSI-X enabling code.  Ideally, we'd have
 374  * one vector per ring/queue, but on a constrained vector budget, we
 375  * group the rings as "efficiently" as possible.  You would add new
 376  * mapping configurations in here.
 377  **/
 378 static void i40evf_map_rings_to_vectors(struct i40evf_adapter *adapter)
 379 {
 380         int rings_remaining = adapter->num_active_queues;
 381         int ridx = 0, vidx = 0;
 382         int q_vectors;
 383
 384         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 385
 386         for (; ridx < rings_remaining; ridx++) {
 387                 i40evf_map_vector_to_rxq(adapter, vidx, ridx);
 388                 i40evf_map_vector_to_txq(adapter, vidx, ridx);
 389
 390                 /* In the case where we have more queues than vectors, continue
 391                  * round-robin on vectors until all queues are mapped.
 392                  */
 393                 if (++vidx >= q_vectors)
 394                         vidx = 0;
 395         }
 396
 397         adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
 398 }
 399
 400 /**
 401  * i40evf_irq_affinity_notify - Callback for affinity changes
 402  * @notify: context as to what irq was changed
 403  * @mask: the new affinity mask
 404  *
 405  * This is a callback function used by the irq_set_affinity_notifier function
 406  * so that we may register to receive changes to the irq affinity masks.
 407  **/
 408 static void i40evf_irq_affinity_notify(struct irq_affinity_notify *notify,
 409                                        const cpumask_t *mask)
 410 {
 411         struct i40e_q_vector *q_vector =
 412                 container_of(notify, struct i40e_q_vector, affinity_notify);
 413
 414         cpumask_copy(&q_vector->affinity_mask, mask);
 415 }
 416
 417 /**
 418  * i40evf_irq_affinity_release - Callback for affinity notifier release
 419  * @ref: internal core kernel usage
 420  *
 421  * This is a callback function used by the irq_set_affinity_notifier function
 422  * to inform the current notification subscriber that they will no longer
 423  * receive notifications.
 424  **/
 425 static void i40evf_irq_affinity_release(struct kref *ref) {}
 426
 427 /**
 428  * i40evf_request_traffic_irqs - Initialize MSI-X interrupts
 429  * @adapter: board private structure
 430  * @basename: device basename
 431  *
 432  * Allocates MSI-X vectors for tx and rx handling, and requests
 433  * interrupts from the kernel.
 434  **/
 435 static int
 436 i40evf_request_traffic_irqs(struct i40evf_adapter *adapter, char *basename)
 437 {
 438         unsigned int vector, q_vectors;
 439         unsigned int rx_int_idx = 0, tx_int_idx = 0;
 440         int irq_num, err;
 441         int cpu;
 442
 443         i40evf_irq_disable(adapter);
 444         /* Decrement for Other and TCP Timer vectors */
 445         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 446
 447         for (vector = 0; vector < q_vectors; vector++) {
 448                 struct i40e_q_vector *q_vector = &adapter->q_vectors[vector];
 449                 irq_num = adapter->msix_entries[vector + NONQ_VECS].vector;
 450
 451                 if (q_vector->tx.ring && q_vector->rx.ring) {
 452                         snprintf(q_vector->name, sizeof(q_vector->name),
 453                                  "i40evf-%s-TxRx-%d", basename, rx_int_idx++);
 454                         tx_int_idx++;
 455                 } else if (q_vector->rx.ring) {
 456                         snprintf(q_vector->name, sizeof(q_vector->name),
 457                                  "i40evf-%s-rx-%d", basename, rx_int_idx++);
 458                 } else if (q_vector->tx.ring) {
 459                         snprintf(q_vector->name, sizeof(q_vector->name),
 460                                  "i40evf-%s-tx-%d", basename, tx_int_idx++);
 461                 } else {
 462                         /* skip this unused q_vector */
 463                         continue;
 464                 }
 465                 err = request_irq(irq_num,
 466                                   i40evf_msix_clean_rings,
 467                                   0,
 468                                   q_vector->name,
 469                                   q_vector);
 470                 if (err) {
 471                         dev_info(&adapter->pdev->dev,
 472                                  "Request_irq failed, error: %d\n", err);
 473                         goto free_queue_irqs;
 474                 }
 475                 /* register for affinity change notifications */
 476                 q_vector->affinity_notify.notify = i40evf_irq_affinity_notify;
 477                 q_vector->affinity_notify.release =
 478                                                    i40evf_irq_affinity_release;
 479                 irq_set_affinity_notifier(irq_num, &q_vector->affinity_notify);
 480                 /* Spread the IRQ affinity hints across online CPUs. Note that
 481                  * get_cpu_mask returns a mask with a permanent lifetime so
 482                  * it's safe to use as a hint for irq_set_affinity_hint.
 483                  */
 484                 cpu = cpumask_local_spread(q_vector->v_idx, -1);
 485                 irq_set_affinity_hint(irq_num, get_cpu_mask(cpu));
 486         }
 487
 488         return 0;
 489
 490 free_queue_irqs:
 491         while (vector) {
 492                 vector--;
 493                 irq_num = adapter->msix_entries[vector + NONQ_VECS].vector;
 494                 irq_set_affinity_notifier(irq_num, NULL);
 495                 irq_set_affinity_hint(irq_num, NULL);
 496                 free_irq(irq_num, &adapter->q_vectors[vector]);
 497         }
 498         return err;
 499 }
 500
 501 /**
 502  * i40evf_request_misc_irq - Initialize MSI-X interrupts
 503  * @adapter: board private structure
 504  *
 505  * Allocates MSI-X vector 0 and requests interrupts from the kernel. This
 506  * vector is only for the admin queue, and stays active even when the netdev
 507  * is closed.
 508  **/
 509 static int i40evf_request_misc_irq(struct i40evf_adapter *adapter)
 510 {
 511         struct net_device *netdev = adapter->netdev;
 512         int err;
 513
 514         snprintf(adapter->misc_vector_name,
 515                  sizeof(adapter->misc_vector_name) - 1, "i40evf-%s:mbx",
 516                  dev_name(&adapter->pdev->dev));
 517         err = request_irq(adapter->msix_entries[0].vector,
 518                           &i40evf_msix_aq, 0,
 519                           adapter->misc_vector_name, netdev);
 520         if (err) {
 521                 dev_err(&adapter->pdev->dev,
 522                         "request_irq for %s failed: %d\n",
 523                         adapter->misc_vector_name, err);
 524                 free_irq(adapter->msix_entries[0].vector, netdev);
 525         }
 526         return err;
 527 }
 528
 529 /**
 530  * i40evf_free_traffic_irqs - Free MSI-X interrupts
 531  * @adapter: board private structure
 532  *
 533  * Frees all MSI-X vectors other than 0.
 534  **/
 535 static void i40evf_free_traffic_irqs(struct i40evf_adapter *adapter)
 536 {
 537         int vector, irq_num, q_vectors;
 538
 539         if (!adapter->msix_entries)
 540                 return;
 541
 542         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 543
 544         for (vector = 0; vector < q_vectors; vector++) {
 545                 irq_num = adapter->msix_entries[vector + NONQ_VECS].vector;
 546                 irq_set_affinity_notifier(irq_num, NULL);
 547                 irq_set_affinity_hint(irq_num, NULL);
 548                 free_irq(irq_num, &adapter->q_vectors[vector]);
 549         }
 550 }
 551
 552 /**
 553  * i40evf_free_misc_irq - Free MSI-X miscellaneous vector
 554  * @adapter: board private structure
 555  *
 556  * Frees MSI-X vector 0.
 557  **/
 558 static void i40evf_free_misc_irq(struct i40evf_adapter *adapter)
 559 {
 560         struct net_device *netdev = adapter->netdev;
 561
 562         if (!adapter->msix_entries)
 563                 return;
 564
 565         free_irq(adapter->msix_entries[0].vector, netdev);
 566 }
 567
 568 /**
 569  * i40evf_configure_tx - Configure Transmit Unit after Reset
 570  * @adapter: board private structure
 571  *
 572  * Configure the Tx unit of the MAC after a reset.
 573  **/
 574 static void i40evf_configure_tx(struct i40evf_adapter *adapter)
 575 {
 576         struct i40e_hw *hw = &adapter->hw;
 577         int i;
 578
 579         for (i = 0; i < adapter->num_active_queues; i++)
 580                 adapter->tx_rings[i].tail = hw->hw_addr + I40E_QTX_TAIL1(i);
 581 }
 582
 583 /**
 584  * i40evf_configure_rx - Configure Receive Unit after Reset
 585  * @adapter: board private structure
 586  *
 587  * Configure the Rx unit of the MAC after a reset.
 588  **/
 589 static void i40evf_configure_rx(struct i40evf_adapter *adapter)
 590 {
 591         unsigned int rx_buf_len = I40E_RXBUFFER_2048;
 592         struct i40e_hw *hw = &adapter->hw;
 593         int i;
 594
 595         /* Legacy Rx will always default to a 2048 buffer size. */
 596 #if (PAGE_SIZE < 8192)
 597         if (!(adapter->flags & I40EVF_FLAG_LEGACY_RX)) {
 598                 struct net_device *netdev = adapter->netdev;
 599
 600                 /* For jumbo frames on systems with 4K pages we have to use
 601                  * an order 1 page, so we might as well increase the size
 602                  * of our Rx buffer to make better use of the available space
 603                  */
 604                 rx_buf_len = I40E_RXBUFFER_3072;
 605
 606                 /* We use a 1536 buffer size for configurations with
 607                  * standard Ethernet mtu.  On x86 this gives us enough room
 608                  * for shared info and 192 bytes of padding.
 609                  */
 610                 if (!I40E_2K_TOO_SMALL_WITH_PADDING &&
 611                     (netdev->mtu <= ETH_DATA_LEN))
 612                         rx_buf_len = I40E_RXBUFFER_1536 - NET_IP_ALIGN;
 613         }
 614 #endif
 615
 616         for (i = 0; i < adapter->num_active_queues; i++) {
 617                 adapter->rx_rings[i].tail = hw->hw_addr + I40E_QRX_TAIL1(i);
 618                 adapter->rx_rings[i].rx_buf_len = rx_buf_len;
 619
 620                 if (adapter->flags & I40EVF_FLAG_LEGACY_RX)
 621                         clear_ring_build_skb_enabled(&adapter->rx_rings[i]);
 622                 else
 623                         set_ring_build_skb_enabled(&adapter->rx_rings[i]);
 624         }
 625 }
 626
 627 /**
 628  * i40evf_find_vlan - Search filter list for specific vlan filter
 629  * @adapter: board private structure
 630  * @vlan: vlan tag
 631  *
 632  * Returns ptr to the filter object or NULL. Must be called while holding the
 633  * mac_vlan_list_lock.
 634  **/
 635 static struct
 636 i40evf_vlan_filter *i40evf_find_vlan(struct i40evf_adapter *adapter, u16 vlan)
 637 {
 638         struct i40evf_vlan_filter *f;
 639
 640         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
 641                 if (vlan == f->vlan)
 642                         return f;
 643         }
 644         return NULL;
 645 }
 646
 647 /**
 648  * i40evf_add_vlan - Add a vlan filter to the list
 649  * @adapter: board private structure
 650  * @vlan: VLAN tag
 651  *
 652  * Returns ptr to the filter object or NULL when no memory available.
 653  **/
 654 static struct
 655 i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan)
 656 {
 657         struct i40evf_vlan_filter *f = NULL;
 658
 659         spin_lock_bh(&adapter->mac_vlan_list_lock);
 660
 661         f = i40evf_find_vlan(adapter, vlan);
 662         if (!f) {
 663                 f = kzalloc(sizeof(*f), GFP_KERNEL);
 664                 if (!f)
 665                         goto clearout;
 666
 667                 f->vlan = vlan;
 668
 669                 INIT_LIST_HEAD(&f->list);
 670                 list_add(&f->list, &adapter->vlan_filter_list);
 671                 f->add = true;
 672                 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
 673         }
 674
 675 clearout:
 676         spin_unlock_bh(&adapter->mac_vlan_list_lock);
 677         return f;
 678 }
 679
 680 /**
 681  * i40evf_del_vlan - Remove a vlan filter from the list
 682  * @adapter: board private structure
 683  * @vlan: VLAN tag
 684  **/
 685 static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan)
 686 {
 687         struct i40evf_vlan_filter *f;
 688
 689         spin_lock_bh(&adapter->mac_vlan_list_lock);
 690
 691         f = i40evf_find_vlan(adapter, vlan);
 692         if (f) {
 693                 f->remove = true;
 694                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
 695         }
 696
 697         spin_unlock_bh(&adapter->mac_vlan_list_lock);
 698 }
 699
 700 /**
 701  * i40evf_vlan_rx_add_vid - Add a VLAN filter to a device
 702  * @netdev: network device struct
 703  * @proto: unused protocol data
 704  * @vid: VLAN tag
 705  **/
 706 static int i40evf_vlan_rx_add_vid(struct net_device *netdev,
 707                                   __always_unused __be16 proto, u16 vid)
 708 {
 709         struct i40evf_adapter *adapter = netdev_priv(netdev);
 710
 711         if (!VLAN_ALLOWED(adapter))
 712                 return -EIO;
 713         if (i40evf_add_vlan(adapter, vid) == NULL)
 714                 return -ENOMEM;
 715         return 0;
 716 }
 717
 718 /**
 719  * i40evf_vlan_rx_kill_vid - Remove a VLAN filter from a device
 720  * @netdev: network device struct
 721  * @proto: unused protocol data
 722  * @vid: VLAN tag
 723  **/
 724 static int i40evf_vlan_rx_kill_vid(struct net_device *netdev,
 725                                    __always_unused __be16 proto, u16 vid)
 726 {
 727         struct i40evf_adapter *adapter = netdev_priv(netdev);
 728
 729         if (VLAN_ALLOWED(adapter)) {
 730                 i40evf_del_vlan(adapter, vid);
 731                 return 0;
 732         }
 733         return -EIO;
 734 }
 735
 736 /**
 737  * i40evf_find_filter - Search filter list for specific mac filter
 738  * @adapter: board private structure
 739  * @macaddr: the MAC address
 740  *
 741  * Returns ptr to the filter object or NULL. Must be called while holding the
 742  * mac_vlan_list_lock.
 743  **/
 744 static struct
 745 i40evf_mac_filter *i40evf_find_filter(struct i40evf_adapter *adapter,
 746                                       const u8 *macaddr)
 747 {
 748         struct i40evf_mac_filter *f;
 749
 750         if (!macaddr)
 751                 return NULL;
 752
 753         list_for_each_entry(f, &adapter->mac_filter_list, list) {
 754                 if (ether_addr_equal(macaddr, f->macaddr))
 755                         return f;
 756         }
 757         return NULL;
 758 }
 759
 760 /**
 761  * i40e_add_filter - Add a mac filter to the filter list
 762  * @adapter: board private structure
 763  * @macaddr: the MAC address
 764  *
 765  * Returns ptr to the filter object or NULL when no memory available.
 766  **/
 767 static struct
 768 i40evf_mac_filter *i40evf_add_filter(struct i40evf_adapter *adapter,
 769                                      const u8 *macaddr)
 770 {
 771         struct i40evf_mac_filter *f;
 772
 773         if (!macaddr)
 774                 return NULL;
 775
 776         f = i40evf_find_filter(adapter, macaddr);
 777         if (!f) {
 778                 f = kzalloc(sizeof(*f), GFP_ATOMIC);
 779                 if (!f)
 780                         return f;
 781
 782                 ether_addr_copy(f->macaddr, macaddr);
 783
 784                 list_add_tail(&f->list, &adapter->mac_filter_list);
 785                 f->add = true;
 786                 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
 787         } else {
 788                 f->remove = false;
 789         }
 790
 791         return f;
 792 }
 793
 794 /**
 795  * i40evf_set_mac - NDO callback to set port mac address
 796  * @netdev: network interface device structure
 797  * @p: pointer to an address structure
 798  *
 799  * Returns 0 on success, negative on failure
 800  **/
 801 static int i40evf_set_mac(struct net_device *netdev, void *p)
 802 {
 803         struct i40evf_adapter *adapter = netdev_priv(netdev);
 804         struct i40e_hw *hw = &adapter->hw;
 805         struct i40evf_mac_filter *f;
 806         struct sockaddr *addr = p;
 807
 808         if (!is_valid_ether_addr(addr->sa_data))
 809                 return -EADDRNOTAVAIL;
 810
 811         if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
 812                 return 0;
 813
 814         if (adapter->flags & I40EVF_FLAG_ADDR_SET_BY_PF)
 815                 return -EPERM;
 816
 817         spin_lock_bh(&adapter->mac_vlan_list_lock);
 818
 819         f = i40evf_find_filter(adapter, hw->mac.addr);
 820         if (f) {
 821                 f->remove = true;
 822                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
 823         }
 824
 825         f = i40evf_add_filter(adapter, addr->sa_data);
 826
 827         spin_unlock_bh(&adapter->mac_vlan_list_lock);
 828
 829         if (f) {
 830                 ether_addr_copy(hw->mac.addr, addr->sa_data);
 831                 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
 832         }
 833
 834         return (f == NULL) ? -ENOMEM : 0;
 835 }
 836
 837 /**
 838  * i40evf_addr_sync - Callback for dev_(mc|uc)_sync to add address
 839  * @netdev: the netdevice
 840  * @addr: address to add
 841  *
 842  * Called by __dev_(mc|uc)_sync when an address needs to be added. We call
 843  * __dev_(uc|mc)_sync from .set_rx_mode and guarantee to hold the hash lock.
 844  */
 845 static int i40evf_addr_sync(struct net_device *netdev, const u8 *addr)
 846 {
 847         struct i40evf_adapter *adapter = netdev_priv(netdev);
 848
 849         if (i40evf_add_filter(adapter, addr))
 850                 return 0;
 851         else
 852                 return -ENOMEM;
 853 }
 854
 855 /**
 856  * i40evf_addr_unsync - Callback for dev_(mc|uc)_sync to remove address
 857  * @netdev: the netdevice
 858  * @addr: address to add
 859  *
 860  * Called by __dev_(mc|uc)_sync when an address needs to be removed. We call
 861  * __dev_(uc|mc)_sync from .set_rx_mode and guarantee to hold the hash lock.
 862  */
 863 static int i40evf_addr_unsync(struct net_device *netdev, const u8 *addr)
 864 {
 865         struct i40evf_adapter *adapter = netdev_priv(netdev);
 866         struct i40evf_mac_filter *f;
 867
 868         /* Under some circumstances, we might receive a request to delete
 869          * our own device address from our uc list. Because we store the
 870          * device address in the VSI's MAC/VLAN filter list, we need to ignore
 871          * such requests and not delete our device address from this list.
 872          */
 873         if (ether_addr_equal(addr, netdev->dev_addr))
 874                 return 0;
 875
 876         f = i40evf_find_filter(adapter, addr);
 877         if (f) {
 878                 f->remove = true;
 879                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
 880         }
 881         return 0;
 882 }
 883
 884 /**
 885  * i40evf_set_rx_mode - NDO callback to set the netdev filters
 886  * @netdev: network interface device structure
 887  **/
 888 static void i40evf_set_rx_mode(struct net_device *netdev)
 889 {
 890         struct i40evf_adapter *adapter = netdev_priv(netdev);
 891
 892         spin_lock_bh(&adapter->mac_vlan_list_lock);
 893         __dev_uc_sync(netdev, i40evf_addr_sync, i40evf_addr_unsync);
 894         __dev_mc_sync(netdev, i40evf_addr_sync, i40evf_addr_unsync);
 895         spin_unlock_bh(&adapter->mac_vlan_list_lock);
 896
 897         if (netdev->flags & IFF_PROMISC &&
 898             !(adapter->flags & I40EVF_FLAG_PROMISC_ON))
 899                 adapter->aq_required |= I40EVF_FLAG_AQ_REQUEST_PROMISC;
 900         else if (!(netdev->flags & IFF_PROMISC) &&
 901                  adapter->flags & I40EVF_FLAG_PROMISC_ON)
 902                 adapter->aq_required |= I40EVF_FLAG_AQ_RELEASE_PROMISC;
 903
 904         if (netdev->flags & IFF_ALLMULTI &&
 905             !(adapter->flags & I40EVF_FLAG_ALLMULTI_ON))
 906                 adapter->aq_required |= I40EVF_FLAG_AQ_REQUEST_ALLMULTI;
 907         else if (!(netdev->flags & IFF_ALLMULTI) &&
 908                  adapter->flags & I40EVF_FLAG_ALLMULTI_ON)
 909                 adapter->aq_required |= I40EVF_FLAG_AQ_RELEASE_ALLMULTI;
 910 }
 911
 912 /**
 913  * i40evf_napi_enable_all - enable NAPI on all queue vectors
 914  * @adapter: board private structure
 915  **/
 916 static void i40evf_napi_enable_all(struct i40evf_adapter *adapter)
 917 {
 918         int q_idx;
 919         struct i40e_q_vector *q_vector;
 920         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 921
 922         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
 923                 struct napi_struct *napi;
 924
 925                 q_vector = &adapter->q_vectors[q_idx];
 926                 napi = &q_vector->napi;
 927                 napi_enable(napi);
 928         }
 929 }
 930
 931 /**
 932  * i40evf_napi_disable_all - disable NAPI on all queue vectors
 933  * @adapter: board private structure
 934  **/
 935 static void i40evf_napi_disable_all(struct i40evf_adapter *adapter)
 936 {
 937         int q_idx;
 938         struct i40e_q_vector *q_vector;
 939         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 940
 941         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
 942                 q_vector = &adapter->q_vectors[q_idx];
 943                 napi_disable(&q_vector->napi);
 944         }
 945 }
 946
 947 /**
 948  * i40evf_configure - set up transmit and receive data structures
 949  * @adapter: board private structure
 950  **/
 951 static void i40evf_configure(struct i40evf_adapter *adapter)
 952 {
 953         struct net_device *netdev = adapter->netdev;
 954         int i;
 955
 956         i40evf_set_rx_mode(netdev);
 957
 958         i40evf_configure_tx(adapter);
 959         i40evf_configure_rx(adapter);
 960         adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
 961
 962         for (i = 0; i < adapter->num_active_queues; i++) {
 963                 struct i40e_ring *ring = &adapter->rx_rings[i];
 964
 965                 i40evf_alloc_rx_buffers(ring, I40E_DESC_UNUSED(ring));
 966         }
 967 }
 968
 969 /**
 970  * i40evf_up_complete - Finish the last steps of bringing up a connection
 971  * @adapter: board private structure
 972  *
 973  * Expects to be called while holding the __I40EVF_IN_CRITICAL_TASK bit lock.
 974  **/
 975 static void i40evf_up_complete(struct i40evf_adapter *adapter)
 976 {
 977         adapter->state = __I40EVF_RUNNING;
 978         clear_bit(__I40E_VSI_DOWN, adapter->vsi.state);
 979
 980         i40evf_napi_enable_all(adapter);
 981
 982         adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES;
 983         if (CLIENT_ENABLED(adapter))
 984                 adapter->flags |= I40EVF_FLAG_CLIENT_NEEDS_OPEN;
 985         mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
 986 }
 987
 988 /**
 989  * i40e_down - Shutdown the connection processing
 990  * @adapter: board private structure
 991  *
 992  * Expects to be called while holding the __I40EVF_IN_CRITICAL_TASK bit lock.
 993  **/
 994 void i40evf_down(struct i40evf_adapter *adapter)
 995 {
 996         struct net_device *netdev = adapter->netdev;
 997         struct i40evf_vlan_filter *vlf;
 998         struct i40evf_mac_filter *f;
 999         struct i40evf_cloud_filter *cf;
1000
1001         if (adapter->state <= __I40EVF_DOWN_PENDING)
1002                 return;
1003
1004         netif_carrier_off(netdev);
1005         netif_tx_disable(netdev);
1006         adapter->link_up = false;
1007         i40evf_napi_disable_all(adapter);
1008         i40evf_irq_disable(adapter);
1009
1010         spin_lock_bh(&adapter->mac_vlan_list_lock);
1011
1012         /* clear the sync flag on all filters */
1013         __dev_uc_unsync(adapter->netdev, NULL);
1014         __dev_mc_unsync(adapter->netdev, NULL);
1015
1016         /* remove all MAC filters */
1017         list_for_each_entry(f, &adapter->mac_filter_list, list) {
1018                 f->remove = true;
1019         }
1020
1021         /* remove all VLAN filters */
1022         list_for_each_entry(vlf, &adapter->vlan_filter_list, list) {
1023                 vlf->remove = true;
1024         }
1025
1026         spin_unlock_bh(&adapter->mac_vlan_list_lock);
1027
1028         /* remove all cloud filters */
1029         spin_lock_bh(&adapter->cloud_filter_list_lock);
1030         list_for_each_entry(cf, &adapter->cloud_filter_list, list) {
1031                 cf->del = true;
1032         }
1033         spin_unlock_bh(&adapter->cloud_filter_list_lock);
1034
1035         if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) &&
1036             adapter->state != __I40EVF_RESETTING) {
1037                 /* cancel any current operation */
1038                 adapter->current_op = VIRTCHNL_OP_UNKNOWN;
1039                 /* Schedule operations to close down the HW. Don't wait
1040                  * here for this to complete. The watchdog is still running
1041                  * and it will take care of this.
1042                  */
1043                 adapter->aq_required = I40EVF_FLAG_AQ_DEL_MAC_FILTER;
1044                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
1045                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_CLOUD_FILTER;
1046                 adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
1047         }
1048
1049         mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
1050 }
1051
1052 /**
1053  * i40evf_acquire_msix_vectors - Setup the MSIX capability
1054  * @adapter: board private structure
1055  * @vectors: number of vectors to request
1056  *
1057  * Work with the OS to set up the MSIX vectors needed.
1058  *
1059  * Returns 0 on success, negative on failure
1060  **/
1061 static int
1062 i40evf_acquire_msix_vectors(struct i40evf_adapter *adapter, int vectors)
1063 {
1064         int err, vector_threshold;
1065
1066         /* We'll want at least 3 (vector_threshold):
1067          * 0) Other (Admin Queue and link, mostly)
1068          * 1) TxQ[0] Cleanup
1069          * 2) RxQ[0] Cleanup
1070          */
1071         vector_threshold = MIN_MSIX_COUNT;
1072
1073         /* The more we get, the more we will assign to Tx/Rx Cleanup
1074          * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1075          * Right now, we simply care about how many we'll get; we'll
1076          * set them up later while requesting irq's.
1077          */
1078         err = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
1079                                     vector_threshold, vectors);
1080         if (err < 0) {
1081                 dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts\n");
1082                 kfree(adapter->msix_entries);
1083                 adapter->msix_entries = NULL;
1084                 return err;
1085         }
1086
1087         /* Adjust for only the vectors we'll use, which is minimum
1088          * of max_msix_q_vectors + NONQ_VECS, or the number of
1089          * vectors we were allocated.
1090          */
1091         adapter->num_msix_vectors = err;
1092         return 0;
1093 }
1094
1095 /**
1096  * i40evf_free_queues - Free memory for all rings
1097  * @adapter: board private structure to initialize
1098  *
1099  * Free all of the memory associated with queue pairs.
1100  **/
1101 static void i40evf_free_queues(struct i40evf_adapter *adapter)
1102 {
1103         if (!adapter->vsi_res)
1104                 return;
1105         adapter->num_active_queues = 0;
1106         kfree(adapter->tx_rings);
1107         adapter->tx_rings = NULL;
1108         kfree(adapter->rx_rings);
1109         adapter->rx_rings = NULL;
1110 }
1111
1112 /**
1113  * i40evf_alloc_queues - Allocate memory for all rings
1114  * @adapter: board private structure to initialize
1115  *
1116  * We allocate one ring per queue at run-time since we don't know the
1117  * number of queues at compile-time.  The polling_netdev array is
1118  * intended for Multiqueue, but should work fine with a single queue.
1119  **/
1120 static int i40evf_alloc_queues(struct i40evf_adapter *adapter)
1121 {
1122         int i, num_active_queues;
1123
1124         /* If we're in reset reallocating queues we don't actually know yet for
1125          * certain the PF gave us the number of queues we asked for but we'll
1126          * assume it did.  Once basic reset is finished we'll confirm once we
1127          * start negotiating config with PF.
1128          */
1129         if (adapter->num_req_queues)
1130                 num_active_queues = adapter->num_req_queues;
1131         else if ((adapter->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_ADQ) &&
1132                  adapter->num_tc)
1133                 num_active_queues = adapter->ch_config.total_qps;
1134         else
1135                 num_active_queues = min_t(int,
1136                                           adapter->vsi_res->num_queue_pairs,
1137                                           (int)(num_online_cpus()));
1138
1139
1140         adapter->tx_rings = kcalloc(num_active_queues,
1141                                     sizeof(struct i40e_ring), GFP_KERNEL);
1142         if (!adapter->tx_rings)
1143                 goto err_out;
1144         adapter->rx_rings = kcalloc(num_active_queues,
1145                                     sizeof(struct i40e_ring), GFP_KERNEL);
1146         if (!adapter->rx_rings)
1147                 goto err_out;
1148
1149         for (i = 0; i < num_active_queues; i++) {
1150                 struct i40e_ring *tx_ring;
1151                 struct i40e_ring *rx_ring;
1152
1153                 tx_ring = &adapter->tx_rings[i];
1154
1155                 tx_ring->queue_index = i;
1156                 tx_ring->netdev = adapter->netdev;
1157                 tx_ring->dev = &adapter->pdev->dev;
1158                 tx_ring->count = adapter->tx_desc_count;
1159                 tx_ring->itr_setting = I40E_ITR_TX_DEF;
1160                 if (adapter->flags & I40EVF_FLAG_WB_ON_ITR_CAPABLE)
1161                         tx_ring->flags |= I40E_TXR_FLAGS_WB_ON_ITR;
1162
1163                 rx_ring = &adapter->rx_rings[i];
1164                 rx_ring->queue_index = i;
1165                 rx_ring->netdev = adapter->netdev;
1166                 rx_ring->dev = &adapter->pdev->dev;
1167                 rx_ring->count = adapter->rx_desc_count;
1168                 rx_ring->itr_setting = I40E_ITR_RX_DEF;
1169         }
1170
1171         adapter->num_active_queues = num_active_queues;
1172
1173         return 0;
1174
1175 err_out:
1176         i40evf_free_queues(adapter);
1177         return -ENOMEM;
1178 }
1179
1180 /**
1181  * i40evf_set_interrupt_capability - set MSI-X or FAIL if not supported
1182  * @adapter: board private structure to initialize
1183  *
1184  * Attempt to configure the interrupts using the best available
1185  * capabilities of the hardware and the kernel.
1186  **/
1187 static int i40evf_set_interrupt_capability(struct i40evf_adapter *adapter)
1188 {
1189         int vector, v_budget;
1190         int pairs = 0;
1191         int err = 0;
1192
1193         if (!adapter->vsi_res) {
1194                 err = -EIO;
1195                 goto out;
1196         }
1197         pairs = adapter->num_active_queues;
1198
1199         /* It's easy to be greedy for MSI-X vectors, but it really doesn't do
1200          * us much good if we have more vectors than CPUs. However, we already
1201          * limit the total number of queues by the number of CPUs so we do not
1202          * need any further limiting here.
1203          */
1204         v_budget = min_t(int, pairs + NONQ_VECS,
1205                          (int)adapter->vf_res->max_vectors);
1206
1207         adapter->msix_entries = kcalloc(v_budget,
1208                                         sizeof(struct msix_entry), GFP_KERNEL);
1209         if (!adapter->msix_entries) {
1210                 err = -ENOMEM;
1211                 goto out;
1212         }
1213
1214         for (vector = 0; vector < v_budget; vector++)
1215                 adapter->msix_entries[vector].entry = vector;
1216
1217         err = i40evf_acquire_msix_vectors(adapter, v_budget);
1218
1219 out:
1220         netif_set_real_num_rx_queues(adapter->netdev, pairs);
1221         netif_set_real_num_tx_queues(adapter->netdev, pairs);
1222         return err;
1223 }
1224
1225 /**
1226  * i40e_config_rss_aq - Configure RSS keys and lut by using AQ commands
1227  * @adapter: board private structure
1228  *
1229  * Return 0 on success, negative on failure
1230  **/
1231 static int i40evf_config_rss_aq(struct i40evf_adapter *adapter)
1232 {
1233         struct i40e_aqc_get_set_rss_key_data *rss_key =
1234                 (struct i40e_aqc_get_set_rss_key_data *)adapter->rss_key;
1235         struct i40e_hw *hw = &adapter->hw;
1236         int ret = 0;
1237
1238         if (adapter->current_op != VIRTCHNL_OP_UNKNOWN) {
1239                 /* bail because we already have a command pending */
1240                 dev_err(&adapter->pdev->dev, "Cannot configure RSS, command %d pending\n",
1241                         adapter->current_op);
1242                 return -EBUSY;
1243         }
1244
1245         ret = i40evf_aq_set_rss_key(hw, adapter->vsi.id, rss_key);
1246         if (ret) {
1247                 dev_err(&adapter->pdev->dev, "Cannot set RSS key, err %s aq_err %s\n",
1248                         i40evf_stat_str(hw, ret),
1249                         i40evf_aq_str(hw, hw->aq.asq_last_status));
1250                 return ret;
1251
1252         }
1253
1254         ret = i40evf_aq_set_rss_lut(hw, adapter->vsi.id, false,
1255                                     adapter->rss_lut, adapter->rss_lut_size);
1256         if (ret) {
1257                 dev_err(&adapter->pdev->dev, "Cannot set RSS lut, err %s aq_err %s\n",
1258                         i40evf_stat_str(hw, ret),
1259                         i40evf_aq_str(hw, hw->aq.asq_last_status));
1260         }
1261
1262         return ret;
1263
1264 }
1265
1266 /**
1267  * i40evf_config_rss_reg - Configure RSS keys and lut by writing registers
1268  * @adapter: board private structure
1269  *
1270  * Returns 0 on success, negative on failure
1271  **/
1272 static int i40evf_config_rss_reg(struct i40evf_adapter *adapter)
1273 {
1274         struct i40e_hw *hw = &adapter->hw;
1275         u32 *dw;
1276         u16 i;
1277
1278         dw = (u32 *)adapter->rss_key;
1279         for (i = 0; i <= adapter->rss_key_size / 4; i++)
1280                 wr32(hw, I40E_VFQF_HKEY(i), dw[i]);
1281
1282         dw = (u32 *)adapter->rss_lut;
1283         for (i = 0; i <= adapter->rss_lut_size / 4; i++)
1284                 wr32(hw, I40E_VFQF_HLUT(i), dw[i]);
1285
1286         i40e_flush(hw);
1287
1288         return 0;
1289 }
1290
1291 /**
1292  * i40evf_config_rss - Configure RSS keys and lut
1293  * @adapter: board private structure
1294  *
1295  * Returns 0 on success, negative on failure
1296  **/
1297 int i40evf_config_rss(struct i40evf_adapter *adapter)
1298 {
1299
1300         if (RSS_PF(adapter)) {
1301                 adapter->aq_required |= I40EVF_FLAG_AQ_SET_RSS_LUT |
1302                                         I40EVF_FLAG_AQ_SET_RSS_KEY;
1303                 return 0;
1304         } else if (RSS_AQ(adapter)) {
1305                 return i40evf_config_rss_aq(adapter);
1306         } else {
1307                 return i40evf_config_rss_reg(adapter);
1308         }
1309 }
1310
1311 /**
1312  * i40evf_fill_rss_lut - Fill the lut with default values
1313  * @adapter: board private structure
1314  **/
1315 static void i40evf_fill_rss_lut(struct i40evf_adapter *adapter)
1316 {
1317         u16 i;
1318
1319         for (i = 0; i < adapter->rss_lut_size; i++)
1320                 adapter->rss_lut[i] = i % adapter->num_active_queues;
1321 }
1322
1323 /**
1324  * i40evf_init_rss - Prepare for RSS
1325  * @adapter: board private structure
1326  *
1327  * Return 0 on success, negative on failure
1328  **/
1329 static int i40evf_init_rss(struct i40evf_adapter *adapter)
1330 {
1331         struct i40e_hw *hw = &adapter->hw;
1332         int ret;
1333
1334         if (!RSS_PF(adapter)) {
1335                 /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
1336                 if (adapter->vf_res->vf_cap_flags &
1337                     VIRTCHNL_VF_OFFLOAD_RSS_PCTYPE_V2)
1338                         adapter->hena = I40E_DEFAULT_RSS_HENA_EXPANDED;
1339                 else
1340                         adapter->hena = I40E_DEFAULT_RSS_HENA;
1341
1342                 wr32(hw, I40E_VFQF_HENA(0), (u32)adapter->hena);
1343                 wr32(hw, I40E_VFQF_HENA(1), (u32)(adapter->hena >> 32));
1344         }
1345
1346         i40evf_fill_rss_lut(adapter);
1347
1348         netdev_rss_key_fill((void *)adapter->rss_key, adapter->rss_key_size);
1349         ret = i40evf_config_rss(adapter);
1350
1351         return ret;
1352 }
1353
1354 /**
1355  * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors
1356  * @adapter: board private structure to initialize
1357  *
1358  * We allocate one q_vector per queue interrupt.  If allocation fails we
1359  * return -ENOMEM.
1360  **/
1361 static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
1362 {
1363         int q_idx = 0, num_q_vectors;
1364         struct i40e_q_vector *q_vector;
1365
1366         num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1367         adapter->q_vectors = kcalloc(num_q_vectors, sizeof(*q_vector),
1368                                      GFP_KERNEL);
1369         if (!adapter->q_vectors)
1370                 return -ENOMEM;
1371
1372         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1373                 q_vector = &adapter->q_vectors[q_idx];
1374                 q_vector->adapter = adapter;
1375                 q_vector->vsi = &adapter->vsi;
1376                 q_vector->v_idx = q_idx;
1377                 q_vector->reg_idx = q_idx;
1378                 cpumask_copy(&q_vector->affinity_mask, cpu_possible_mask);
1379                 netif_napi_add(adapter->netdev, &q_vector->napi,
1380                                i40evf_napi_poll, NAPI_POLL_WEIGHT);
1381         }
1382
1383         return 0;
1384 }
1385
1386 /**
1387  * i40evf_free_q_vectors - Free memory allocated for interrupt vectors
1388  * @adapter: board private structure to initialize
1389  *
1390  * This function frees the memory allocated to the q_vectors.  In addition if
1391  * NAPI is enabled it will delete any references to the NAPI struct prior
1392  * to freeing the q_vector.
1393  **/
1394 static void i40evf_free_q_vectors(struct i40evf_adapter *adapter)
1395 {
1396         int q_idx, num_q_vectors;
1397         int napi_vectors;
1398
1399         if (!adapter->q_vectors)
1400                 return;
1401
1402         num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1403         napi_vectors = adapter->num_active_queues;
1404
1405         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1406                 struct i40e_q_vector *q_vector = &adapter->q_vectors[q_idx];
1407                 if (q_idx < napi_vectors)
1408                         netif_napi_del(&q_vector->napi);
1409         }
1410         kfree(adapter->q_vectors);
1411         adapter->q_vectors = NULL;
1412 }
1413
1414 /**
1415  * i40evf_reset_interrupt_capability - Reset MSIX setup
1416  * @adapter: board private structure
1417  *
1418  **/
1419 void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
1420 {
1421         if (!adapter->msix_entries)
1422                 return;
1423
1424         pci_disable_msix(adapter->pdev);
1425         kfree(adapter->msix_entries);
1426         adapter->msix_entries = NULL;
1427 }
1428
1429 /**
1430  * i40evf_init_interrupt_scheme - Determine if MSIX is supported and init
1431  * @adapter: board private structure to initialize
1432  *
1433  **/
1434 int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter)
1435 {
1436         int err;
1437
1438         err = i40evf_alloc_queues(adapter);
1439         if (err) {
1440                 dev_err(&adapter->pdev->dev,
1441                         "Unable to allocate memory for queues\n");
1442                 goto err_alloc_queues;
1443         }
1444
1445         rtnl_lock();
1446         err = i40evf_set_interrupt_capability(adapter);
1447         rtnl_unlock();
1448         if (err) {
1449                 dev_err(&adapter->pdev->dev,
1450                         "Unable to setup interrupt capabilities\n");
1451                 goto err_set_interrupt;
1452         }
1453
1454         err = i40evf_alloc_q_vectors(adapter);
1455         if (err) {
1456                 dev_err(&adapter->pdev->dev,
1457                         "Unable to allocate memory for queue vectors\n");
1458                 goto err_alloc_q_vectors;
1459         }
1460
1461         /* If we've made it so far while ADq flag being ON, then we haven't
1462          * bailed out anywhere in middle. And ADq isn't just enabled but actual
1463          * resources have been allocated in the reset path.
1464          * Now we can truly claim that ADq is enabled.
1465          */
1466         if ((adapter->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_ADQ) &&
1467             adapter->num_tc)
1468                 dev_info(&adapter->pdev->dev, "ADq Enabled, %u TCs created",
1469                          adapter->num_tc);
1470
1471         dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
1472                  (adapter->num_active_queues > 1) ? "Enabled" : "Disabled",
1473                  adapter->num_active_queues);
1474
1475         return 0;
1476 err_alloc_q_vectors:
1477         i40evf_reset_interrupt_capability(adapter);
1478 err_set_interrupt:
1479         i40evf_free_queues(adapter);
1480 err_alloc_queues:
1481         return err;
1482 }
1483
1484 /**
1485  * i40evf_free_rss - Free memory used by RSS structs
1486  * @adapter: board private structure
1487  **/
1488 static void i40evf_free_rss(struct i40evf_adapter *adapter)
1489 {
1490         kfree(adapter->rss_key);
1491         adapter->rss_key = NULL;
1492
1493         kfree(adapter->rss_lut);
1494         adapter->rss_lut = NULL;
1495 }
1496
1497 /**
1498  * i40evf_reinit_interrupt_scheme - Reallocate queues and vectors
1499  * @adapter: board private structure
1500  *
1501  * Returns 0 on success, negative on failure
1502  **/
1503 static int i40evf_reinit_interrupt_scheme(struct i40evf_adapter *adapter)
1504 {
1505         struct net_device *netdev = adapter->netdev;
1506         int err;
1507
1508         if (netif_running(netdev))
1509                 i40evf_free_traffic_irqs(adapter);
1510         i40evf_free_misc_irq(adapter);
1511         i40evf_reset_interrupt_capability(adapter);
1512         i40evf_free_q_vectors(adapter);
1513         i40evf_free_queues(adapter);
1514
1515         err =  i40evf_init_interrupt_scheme(adapter);
1516         if (err)
1517                 goto err;
1518
1519         netif_tx_stop_all_queues(netdev);
1520
1521         err = i40evf_request_misc_irq(adapter);
1522         if (err)
1523                 goto err;
1524
1525         set_bit(__I40E_VSI_DOWN, adapter->vsi.state);
1526
1527         i40evf_map_rings_to_vectors(adapter);
1528
1529         if (RSS_AQ(adapter))
1530                 adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_RSS;
1531         else
1532                 err = i40evf_init_rss(adapter);
1533 err:
1534         return err;
1535 }
1536
1537 /**
1538  * i40evf_watchdog_timer - Periodic call-back timer
1539  * @data: pointer to adapter disguised as unsigned long
1540  **/
1541 static void i40evf_watchdog_timer(struct timer_list *t)
1542 {
1543         struct i40evf_adapter *adapter = from_timer(adapter, t,
1544                                                     watchdog_timer);
1545
1546         schedule_work(&adapter->watchdog_task);
1547         /* timer will be rescheduled in watchdog task */
1548 }
1549
1550 /**
1551  * i40evf_watchdog_task - Periodic call-back task
1552  * @work: pointer to work_struct
1553  **/
1554 static void i40evf_watchdog_task(struct work_struct *work)
1555 {
1556         struct i40evf_adapter *adapter = container_of(work,
1557                                                       struct i40evf_adapter,
1558                                                       watchdog_task);
1559         struct i40e_hw *hw = &adapter->hw;
1560         u32 reg_val;
1561
1562         if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
1563                 goto restart_watchdog;
1564
1565         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1566                 reg_val = rd32(hw, I40E_VFGEN_RSTAT) &
1567                           I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1568                 if ((reg_val == VIRTCHNL_VFR_VFACTIVE) ||
1569                     (reg_val == VIRTCHNL_VFR_COMPLETED)) {
1570                         /* A chance for redemption! */
1571                         dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
1572                         adapter->state = __I40EVF_STARTUP;
1573                         adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1574                         schedule_delayed_work(&adapter->init_task, 10);
1575                         clear_bit(__I40EVF_IN_CRITICAL_TASK,
1576                                   &adapter->crit_section);
1577                         /* Don't reschedule the watchdog, since we've restarted
1578                          * the init task. When init_task contacts the PF and
1579                          * gets everything set up again, it'll restart the
1580                          * watchdog for us. Down, boy. Sit. Stay. Woof.
1581                          */
1582                         return;
1583                 }
1584                 adapter->aq_required = 0;
1585                 adapter->current_op = VIRTCHNL_OP_UNKNOWN;
1586                 goto watchdog_done;
1587         }
1588
1589         if ((adapter->state < __I40EVF_DOWN) ||
1590             (adapter->flags & I40EVF_FLAG_RESET_PENDING))
1591                 goto watchdog_done;
1592
1593         /* check for reset */
1594         reg_val = rd32(hw, I40E_VF_ARQLEN1) & I40E_VF_ARQLEN1_ARQENABLE_MASK;
1595         if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) && !reg_val) {
1596                 adapter->state = __I40EVF_RESETTING;
1597                 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1598                 dev_err(&adapter->pdev->dev, "Hardware reset detected\n");
1599                 schedule_work(&adapter->reset_task);
1600                 adapter->aq_required = 0;
1601                 adapter->current_op = VIRTCHNL_OP_UNKNOWN;
1602                 goto watchdog_done;
1603         }
1604
1605         /* Process admin queue tasks. After init, everything gets done
1606          * here so we don't race on the admin queue.
1607          */
1608         if (adapter->current_op) {
1609                 if (!i40evf_asq_done(hw)) {
1610                         dev_dbg(&adapter->pdev->dev, "Admin queue timeout\n");
1611                         i40evf_send_api_ver(adapter);
1612                 }
1613                 goto watchdog_done;
1614         }
1615         if (adapter->aq_required & I40EVF_FLAG_AQ_GET_CONFIG) {
1616                 i40evf_send_vf_config_msg(adapter);
1617                 goto watchdog_done;
1618         }
1619
1620         if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
1621                 i40evf_disable_queues(adapter);
1622                 goto watchdog_done;
1623         }
1624
1625         if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
1626                 i40evf_map_queues(adapter);
1627                 goto watchdog_done;
1628         }
1629
1630         if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
1631                 i40evf_add_ether_addrs(adapter);
1632                 goto watchdog_done;
1633         }
1634
1635         if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
1636                 i40evf_add_vlans(adapter);
1637                 goto watchdog_done;
1638         }
1639
1640         if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
1641                 i40evf_del_ether_addrs(adapter);
1642                 goto watchdog_done;
1643         }
1644
1645         if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
1646                 i40evf_del_vlans(adapter);
1647                 goto watchdog_done;
1648         }
1649
1650         if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_VLAN_STRIPPING) {
1651                 i40evf_enable_vlan_stripping(adapter);
1652                 goto watchdog_done;
1653         }
1654
1655         if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_VLAN_STRIPPING) {
1656                 i40evf_disable_vlan_stripping(adapter);
1657                 goto watchdog_done;
1658         }
1659
1660         if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
1661                 i40evf_configure_queues(adapter);
1662                 goto watchdog_done;
1663         }
1664
1665         if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
1666                 i40evf_enable_queues(adapter);
1667                 goto watchdog_done;
1668         }
1669
1670         if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_RSS) {
1671                 /* This message goes straight to the firmware, not the
1672                  * PF, so we don't have to set current_op as we will
1673                  * not get a response through the ARQ.
1674                  */
1675                 i40evf_init_rss(adapter);
1676                 adapter->aq_required &= ~I40EVF_FLAG_AQ_CONFIGURE_RSS;
1677                 goto watchdog_done;
1678         }
1679         if (adapter->aq_required & I40EVF_FLAG_AQ_GET_HENA) {
1680                 i40evf_get_hena(adapter);
1681                 goto watchdog_done;
1682         }
1683         if (adapter->aq_required & I40EVF_FLAG_AQ_SET_HENA) {
1684                 i40evf_set_hena(adapter);
1685                 goto watchdog_done;
1686         }
1687         if (adapter->aq_required & I40EVF_FLAG_AQ_SET_RSS_KEY) {
1688                 i40evf_set_rss_key(adapter);
1689                 goto watchdog_done;
1690         }
1691         if (adapter->aq_required & I40EVF_FLAG_AQ_SET_RSS_LUT) {
1692                 i40evf_set_rss_lut(adapter);
1693                 goto watchdog_done;
1694         }
1695
1696         if (adapter->aq_required & I40EVF_FLAG_AQ_REQUEST_PROMISC) {
1697                 i40evf_set_promiscuous(adapter, FLAG_VF_UNICAST_PROMISC |
1698                                        FLAG_VF_MULTICAST_PROMISC);
1699                 goto watchdog_done;
1700         }
1701
1702         if (adapter->aq_required & I40EVF_FLAG_AQ_REQUEST_ALLMULTI) {
1703                 i40evf_set_promiscuous(adapter, FLAG_VF_MULTICAST_PROMISC);
1704                 goto watchdog_done;
1705         }
1706
1707         if ((adapter->aq_required & I40EVF_FLAG_AQ_RELEASE_PROMISC) &&
1708             (adapter->aq_required & I40EVF_FLAG_AQ_RELEASE_ALLMULTI)) {
1709                 i40evf_set_promiscuous(adapter, 0);
1710                 goto watchdog_done;
1711         }
1712
1713         if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_CHANNELS) {
1714                 i40evf_enable_channels(adapter);
1715                 goto watchdog_done;
1716         }
1717
1718         if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_CHANNELS) {
1719                 i40evf_disable_channels(adapter);
1720                 goto watchdog_done;
1721         }
1722
1723         if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_CLOUD_FILTER) {
1724                 i40evf_add_cloud_filter(adapter);
1725                 goto watchdog_done;
1726         }
1727
1728         if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_CLOUD_FILTER) {
1729                 i40evf_del_cloud_filter(adapter);
1730                 goto watchdog_done;
1731         }
1732
1733         schedule_delayed_work(&adapter->client_task, msecs_to_jiffies(5));
1734
1735         if (adapter->state == __I40EVF_RUNNING)
1736                 i40evf_request_stats(adapter);
1737 watchdog_done:
1738         if (adapter->state == __I40EVF_RUNNING)
1739                 i40evf_detect_recover_hung(&adapter->vsi);
1740         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1741 restart_watchdog:
1742         if (adapter->state == __I40EVF_REMOVE)
1743                 return;
1744         if (adapter->aq_required)
1745                 mod_timer(&adapter->watchdog_timer,
1746                           jiffies + msecs_to_jiffies(20));
1747         else
1748                 mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
1749         schedule_work(&adapter->adminq_task);
1750 }
1751
1752 static void i40evf_disable_vf(struct i40evf_adapter *adapter)
1753 {
1754         struct i40evf_mac_filter *f, *ftmp;
1755         struct i40evf_vlan_filter *fv, *fvtmp;
1756         struct i40evf_cloud_filter *cf, *cftmp;
1757
1758         adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
1759
1760         /* We don't use netif_running() because it may be true prior to
1761          * ndo_open() returning, so we can't assume it means all our open
1762          * tasks have finished, since we're not holding the rtnl_lock here.
1763          */
1764         if (adapter->state == __I40EVF_RUNNING) {
1765                 set_bit(__I40E_VSI_DOWN, adapter->vsi.state);
1766                 netif_carrier_off(adapter->netdev);
1767                 netif_tx_disable(adapter->netdev);
1768                 adapter->link_up = false;
1769                 i40evf_napi_disable_all(adapter);
1770                 i40evf_irq_disable(adapter);
1771                 i40evf_free_traffic_irqs(adapter);
1772                 i40evf_free_all_tx_resources(adapter);
1773                 i40evf_free_all_rx_resources(adapter);
1774         }
1775
1776         spin_lock_bh(&adapter->mac_vlan_list_lock);
1777
1778         /* Delete all of the filters */
1779         list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
1780                 list_del(&f->list);
1781                 kfree(f);
1782         }
1783
1784         list_for_each_entry_safe(fv, fvtmp, &adapter->vlan_filter_list, list) {
1785                 list_del(&fv->list);
1786                 kfree(fv);
1787         }
1788
1789         spin_unlock_bh(&adapter->mac_vlan_list_lock);
1790
1791         spin_lock_bh(&adapter->cloud_filter_list_lock);
1792         list_for_each_entry_safe(cf, cftmp, &adapter->cloud_filter_list, list) {
1793                 list_del(&cf->list);
1794                 kfree(cf);
1795                 adapter->num_cloud_filters--;
1796         }
1797         spin_unlock_bh(&adapter->cloud_filter_list_lock);
1798
1799         i40evf_free_misc_irq(adapter);
1800         i40evf_reset_interrupt_capability(adapter);
1801         i40evf_free_queues(adapter);
1802         i40evf_free_q_vectors(adapter);
1803         kfree(adapter->vf_res);
1804         i40evf_shutdown_adminq(&adapter->hw);
1805         adapter->netdev->flags &= ~IFF_UP;
1806         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1807         adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1808         adapter->state = __I40EVF_DOWN;
1809         wake_up(&adapter->down_waitqueue);
1810         dev_info(&adapter->pdev->dev, "Reset task did not complete, VF disabled\n");
1811 }
1812
1813 #define I40EVF_RESET_WAIT_MS 10
1814 #define I40EVF_RESET_WAIT_COUNT 500
1815 /**
1816  * i40evf_reset_task - Call-back task to handle hardware reset
1817  * @work: pointer to work_struct
1818  *
1819  * During reset we need to shut down and reinitialize the admin queue
1820  * before we can use it to communicate with the PF again. We also clear
1821  * and reinit the rings because that context is lost as well.
1822  **/
1823 static void i40evf_reset_task(struct work_struct *work)
1824 {
1825         struct i40evf_adapter *adapter = container_of(work,
1826                                                       struct i40evf_adapter,
1827                                                       reset_task);
1828         struct virtchnl_vf_resource *vfres = adapter->vf_res;
1829         struct net_device *netdev = adapter->netdev;
1830         struct i40e_hw *hw = &adapter->hw;
1831         struct i40evf_vlan_filter *vlf;
1832         struct i40evf_cloud_filter *cf;
1833         struct i40evf_mac_filter *f;
1834         u32 reg_val;
1835         int i = 0, err;
1836         bool running;
1837
1838         /* When device is being removed it doesn't make sense to run the reset
1839          * task, just return in such a case.
1840          */
1841         if (test_bit(__I40EVF_IN_REMOVE_TASK, &adapter->crit_section))
1842                 return;
1843
1844         while (test_and_set_bit(__I40EVF_IN_CLIENT_TASK,
1845                                 &adapter->crit_section))
1846                 usleep_range(500, 1000);
1847         if (CLIENT_ENABLED(adapter)) {
1848                 adapter->flags &= ~(I40EVF_FLAG_CLIENT_NEEDS_OPEN |
1849                                     I40EVF_FLAG_CLIENT_NEEDS_CLOSE |
1850                                     I40EVF_FLAG_CLIENT_NEEDS_L2_PARAMS |
1851                                     I40EVF_FLAG_SERVICE_CLIENT_REQUESTED);
1852                 cancel_delayed_work_sync(&adapter->client_task);
1853                 i40evf_notify_client_close(&adapter->vsi, true);
1854         }
1855         i40evf_misc_irq_disable(adapter);
1856         if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) {
1857                 adapter->flags &= ~I40EVF_FLAG_RESET_NEEDED;
1858                 /* Restart the AQ here. If we have been reset but didn't
1859                  * detect it, or if the PF had to reinit, our AQ will be hosed.
1860                  */
1861                 i40evf_shutdown_adminq(hw);
1862                 i40evf_init_adminq(hw);
1863                 i40evf_request_reset(adapter);
1864         }
1865         adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1866
1867         /* poll until we see the reset actually happen */
1868         for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1869                 reg_val = rd32(hw, I40E_VF_ARQLEN1) &
1870                           I40E_VF_ARQLEN1_ARQENABLE_MASK;
1871                 if (!reg_val)
1872                         break;
1873                 usleep_range(5000, 10000);
1874         }
1875         if (i == I40EVF_RESET_WAIT_COUNT) {
1876                 dev_info(&adapter->pdev->dev, "Never saw reset\n");
1877                 goto continue_reset; /* act like the reset happened */
1878         }
1879
1880         /* wait until the reset is complete and the PF is responding to us */
1881         for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1882                 /* sleep first to make sure a minimum wait time is met */
1883                 msleep(I40EVF_RESET_WAIT_MS);
1884
1885                 reg_val = rd32(hw, I40E_VFGEN_RSTAT) &
1886                           I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1887                 if (reg_val == VIRTCHNL_VFR_VFACTIVE)
1888                         break;
1889         }
1890
1891         pci_set_master(adapter->pdev);
1892
1893         if (i == I40EVF_RESET_WAIT_COUNT) {
1894                 dev_err(&adapter->pdev->dev, "Reset never finished (%x)\n",
1895                         reg_val);
1896                 i40evf_disable_vf(adapter);
1897                 clear_bit(__I40EVF_IN_CLIENT_TASK, &adapter->crit_section);
1898                 return; /* Do not attempt to reinit. It's dead, Jim. */
1899         }
1900
1901 continue_reset:
1902         /* We don't use netif_running() because it may be true prior to
1903          * ndo_open() returning, so we can't assume it means all our open
1904          * tasks have finished, since we're not holding the rtnl_lock here.
1905          */
1906         running = ((adapter->state == __I40EVF_RUNNING) ||
1907                    (adapter->state == __I40EVF_RESETTING));
1908
1909         if (running) {
1910                 netif_carrier_off(netdev);
1911                 netif_tx_stop_all_queues(netdev);
1912                 adapter->link_up = false;
1913                 i40evf_napi_disable_all(adapter);
1914         }
1915         i40evf_irq_disable(adapter);
1916
1917         adapter->state = __I40EVF_RESETTING;
1918         adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1919
1920         /* free the Tx/Rx rings and descriptors, might be better to just
1921          * re-use them sometime in the future
1922          */
1923         i40evf_free_all_rx_resources(adapter);
1924         i40evf_free_all_tx_resources(adapter);
1925
1926         adapter->flags |= I40EVF_FLAG_QUEUES_DISABLED;
1927         /* kill and reinit the admin queue */
1928         i40evf_shutdown_adminq(hw);
1929         adapter->current_op = VIRTCHNL_OP_UNKNOWN;
1930         err = i40evf_init_adminq(hw);
1931         if (err)
1932                 dev_info(&adapter->pdev->dev, "Failed to init adminq: %d\n",
1933                          err);
1934         adapter->aq_required = 0;
1935
1936         if (adapter->flags & I40EVF_FLAG_REINIT_ITR_NEEDED) {
1937                 err = i40evf_reinit_interrupt_scheme(adapter);
1938                 if (err)
1939                         goto reset_err;
1940         }
1941
1942         adapter->aq_required |= I40EVF_FLAG_AQ_GET_CONFIG;
1943         adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
1944
1945         spin_lock_bh(&adapter->mac_vlan_list_lock);
1946
1947         /* re-add all MAC filters */
1948         list_for_each_entry(f, &adapter->mac_filter_list, list) {
1949                 f->add = true;
1950         }
1951         /* re-add all VLAN filters */
1952         list_for_each_entry(vlf, &adapter->vlan_filter_list, list) {
1953                 vlf->add = true;
1954         }
1955
1956         spin_unlock_bh(&adapter->mac_vlan_list_lock);
1957
1958         /* check if TCs are running and re-add all cloud filters */
1959         spin_lock_bh(&adapter->cloud_filter_list_lock);
1960         if ((vfres->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_ADQ) &&
1961             adapter->num_tc) {
1962                 list_for_each_entry(cf, &adapter->cloud_filter_list, list) {
1963                         cf->add = true;
1964                 }
1965         }
1966         spin_unlock_bh(&adapter->cloud_filter_list_lock);
1967
1968         adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
1969         adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
1970         adapter->aq_required |= I40EVF_FLAG_AQ_ADD_CLOUD_FILTER;
1971         i40evf_misc_irq_enable(adapter);
1972
1973         mod_timer(&adapter->watchdog_timer, jiffies + 2);
1974
1975         /* We were running when the reset started, so we need to restore some
1976          * state here.
1977          */
1978         if (running) {
1979                 /* allocate transmit descriptors */
1980                 err = i40evf_setup_all_tx_resources(adapter);
1981                 if (err)
1982                         goto reset_err;
1983
1984                 /* allocate receive descriptors */
1985                 err = i40evf_setup_all_rx_resources(adapter);
1986                 if (err)
1987                         goto reset_err;
1988
1989                 if (adapter->flags & I40EVF_FLAG_REINIT_ITR_NEEDED) {
1990                         err = i40evf_request_traffic_irqs(adapter,
1991                                                           netdev->name);
1992                         if (err)
1993                                 goto reset_err;
1994
1995                         adapter->flags &= ~I40EVF_FLAG_REINIT_ITR_NEEDED;
1996                 }
1997
1998                 i40evf_configure(adapter);
1999
2000                 i40evf_up_complete(adapter);
2001
2002                 i40evf_irq_enable(adapter, true);
2003         } else {
2004                 adapter->state = __I40EVF_DOWN;
2005                 wake_up(&adapter->down_waitqueue);
2006         }
2007         clear_bit(__I40EVF_IN_CLIENT_TASK, &adapter->crit_section);
2008         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
2009
2010         return;
2011 reset_err:
2012         clear_bit(__I40EVF_IN_CLIENT_TASK, &adapter->crit_section);
2013         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
2014         dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
2015         i40evf_close(netdev);
2016 }
2017
2018 /**
2019  * i40evf_adminq_task - worker thread to clean the admin queue
2020  * @work: pointer to work_struct containing our data
2021  **/
2022 static void i40evf_adminq_task(struct work_struct *work)
2023 {
2024         struct i40evf_adapter *adapter =
2025                 container_of(work, struct i40evf_adapter, adminq_task);
2026         struct i40e_hw *hw = &adapter->hw;
2027         struct i40e_arq_event_info event;
2028         enum virtchnl_ops v_op;
2029         i40e_status ret, v_ret;
2030         u32 val, oldval;
2031         u16 pending;
2032
2033         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
2034                 goto out;
2035
2036         event.buf_len = I40EVF_MAX_AQ_BUF_SIZE;
2037         event.msg_buf = kzalloc(event.buf_len, GFP_KERNEL);
2038         if (!event.msg_buf)
2039                 goto out;
2040
2041         do {
2042                 ret = i40evf_clean_arq_element(hw, &event, &pending);
2043                 v_op = (enum virtchnl_ops)le32_to_cpu(event.desc.cookie_high);
2044                 v_ret = (i40e_status)le32_to_cpu(event.desc.cookie_low);
2045
2046                 if (ret || !v_op)
2047                         break; /* No event to process or error cleaning ARQ */
2048
2049                 i40evf_virtchnl_completion(adapter, v_op, v_ret, event.msg_buf,
2050                                            event.msg_len);
2051                 if (pending != 0)
2052                         memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
2053         } while (pending);
2054
2055         if ((adapter->flags &
2056              (I40EVF_FLAG_RESET_PENDING | I40EVF_FLAG_RESET_NEEDED)) ||
2057             adapter->state == __I40EVF_RESETTING)
2058                 goto freedom;
2059
2060         /* check for error indications */
2061         val = rd32(hw, hw->aq.arq.len);
2062         if (val == 0xdeadbeef || val == 0xffffffff) /* device in reset */
2063                 goto freedom;
2064         oldval = val;
2065         if (val & I40E_VF_ARQLEN1_ARQVFE_MASK) {
2066                 dev_info(&adapter->pdev->dev, "ARQ VF Error detected\n");
2067                 val &= ~I40E_VF_ARQLEN1_ARQVFE_MASK;
2068         }
2069         if (val & I40E_VF_ARQLEN1_ARQOVFL_MASK) {
2070                 dev_info(&adapter->pdev->dev, "ARQ Overflow Error detected\n");
2071                 val &= ~I40E_VF_ARQLEN1_ARQOVFL_MASK;
2072         }
2073         if (val & I40E_VF_ARQLEN1_ARQCRIT_MASK) {
2074                 dev_info(&adapter->pdev->dev, "ARQ Critical Error detected\n");
2075                 val &= ~I40E_VF_ARQLEN1_ARQCRIT_MASK;
2076         }
2077         if (oldval != val)
2078                 wr32(hw, hw->aq.arq.len, val);
2079
2080         val = rd32(hw, hw->aq.asq.len);
2081         oldval = val;
2082         if (val & I40E_VF_ATQLEN1_ATQVFE_MASK) {
2083                 dev_info(&adapter->pdev->dev, "ASQ VF Error detected\n");
2084                 val &= ~I40E_VF_ATQLEN1_ATQVFE_MASK;
2085         }
2086         if (val & I40E_VF_ATQLEN1_ATQOVFL_MASK) {
2087                 dev_info(&adapter->pdev->dev, "ASQ Overflow Error detected\n");
2088                 val &= ~I40E_VF_ATQLEN1_ATQOVFL_MASK;
2089         }
2090         if (val & I40E_VF_ATQLEN1_ATQCRIT_MASK) {
2091                 dev_info(&adapter->pdev->dev, "ASQ Critical Error detected\n");
2092                 val &= ~I40E_VF_ATQLEN1_ATQCRIT_MASK;
2093         }
2094         if (oldval != val)
2095                 wr32(hw, hw->aq.asq.len, val);
2096
2097 freedom:
2098         kfree(event.msg_buf);
2099 out:
2100         /* re-enable Admin queue interrupt cause */
2101         i40evf_misc_irq_enable(adapter);
2102 }
2103
2104 /**
2105  * i40evf_client_task - worker thread to perform client work
2106  * @work: pointer to work_struct containing our data
2107  *
2108  * This task handles client interactions. Because client calls can be
2109  * reentrant, we can't handle them in the watchdog.
2110  **/
2111 static void i40evf_client_task(struct work_struct *work)
2112 {
2113         struct i40evf_adapter *adapter =
2114                 container_of(work, struct i40evf_adapter, client_task.work);
2115
2116         /* If we can't get the client bit, just give up. We'll be rescheduled
2117          * later.
2118          */
2119
2120         if (test_and_set_bit(__I40EVF_IN_CLIENT_TASK, &adapter->crit_section))
2121                 return;
2122
2123         if (adapter->flags & I40EVF_FLAG_SERVICE_CLIENT_REQUESTED) {
2124                 i40evf_client_subtask(adapter);
2125                 adapter->flags &= ~I40EVF_FLAG_SERVICE_CLIENT_REQUESTED;
2126                 goto out;
2127         }
2128         if (adapter->flags & I40EVF_FLAG_CLIENT_NEEDS_L2_PARAMS) {
2129                 i40evf_notify_client_l2_params(&adapter->vsi);
2130                 adapter->flags &= ~I40EVF_FLAG_CLIENT_NEEDS_L2_PARAMS;
2131                 goto out;
2132         }
2133         if (adapter->flags & I40EVF_FLAG_CLIENT_NEEDS_CLOSE) {
2134                 i40evf_notify_client_close(&adapter->vsi, false);
2135                 adapter->flags &= ~I40EVF_FLAG_CLIENT_NEEDS_CLOSE;
2136                 goto out;
2137         }
2138         if (adapter->flags & I40EVF_FLAG_CLIENT_NEEDS_OPEN) {
2139                 i40evf_notify_client_open(&adapter->vsi);
2140                 adapter->flags &= ~I40EVF_FLAG_CLIENT_NEEDS_OPEN;
2141         }
2142 out:
2143         clear_bit(__I40EVF_IN_CLIENT_TASK, &adapter->crit_section);
2144 }
2145
2146 /**
2147  * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
2148  * @adapter: board private structure
2149  *
2150  * Free all transmit software resources
2151  **/
2152 void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
2153 {
2154         int i;
2155
2156         if (!adapter->tx_rings)
2157                 return;
2158
2159         for (i = 0; i < adapter->num_active_queues; i++)
2160                 if (adapter->tx_rings[i].desc)
2161                         i40evf_free_tx_resources(&adapter->tx_rings[i]);
2162 }
2163
2164 /**
2165  * i40evf_setup_all_tx_resources - allocate all queues Tx resources
2166  * @adapter: board private structure
2167  *
2168  * If this function returns with an error, then it's possible one or
2169  * more of the rings is populated (while the rest are not).  It is the
2170  * callers duty to clean those orphaned rings.
2171  *
2172  * Return 0 on success, negative on failure
2173  **/
2174 static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter)
2175 {
2176         int i, err = 0;
2177
2178         for (i = 0; i < adapter->num_active_queues; i++) {
2179                 adapter->tx_rings[i].count = adapter->tx_desc_count;
2180                 err = i40evf_setup_tx_descriptors(&adapter->tx_rings[i]);
2181                 if (!err)
2182                         continue;
2183                 dev_err(&adapter->pdev->dev,
2184                         "Allocation for Tx Queue %u failed\n", i);
2185                 break;
2186         }
2187
2188         return err;
2189 }
2190
2191 /**
2192  * i40evf_setup_all_rx_resources - allocate all queues Rx resources
2193  * @adapter: board private structure
2194  *
2195  * If this function returns with an error, then it's possible one or
2196  * more of the rings is populated (while the rest are not).  It is the
2197  * callers duty to clean those orphaned rings.
2198  *
2199  * Return 0 on success, negative on failure
2200  **/
2201 static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter)
2202 {
2203         int i, err = 0;
2204
2205         for (i = 0; i < adapter->num_active_queues; i++) {
2206                 adapter->rx_rings[i].count = adapter->rx_desc_count;
2207                 err = i40evf_setup_rx_descriptors(&adapter->rx_rings[i]);
2208                 if (!err)
2209                         continue;
2210                 dev_err(&adapter->pdev->dev,
2211                         "Allocation for Rx Queue %u failed\n", i);
2212                 break;
2213         }
2214         return err;
2215 }
2216
2217 /**
2218  * i40evf_free_all_rx_resources - Free Rx Resources for All Queues
2219  * @adapter: board private structure
2220  *
2221  * Free all receive software resources
2222  **/
2223 void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
2224 {
2225         int i;
2226
2227         if (!adapter->rx_rings)
2228                 return;
2229
2230         for (i = 0; i < adapter->num_active_queues; i++)
2231                 if (adapter->rx_rings[i].desc)
2232                         i40evf_free_rx_resources(&adapter->rx_rings[i]);
2233 }
2234
2235 /**
2236  * i40evf_validate_tx_bandwidth - validate the max Tx bandwidth
2237  * @adapter: board private structure
2238  * @max_tx_rate: max Tx bw for a tc
2239  **/
2240 static int i40evf_validate_tx_bandwidth(struct i40evf_adapter *adapter,
2241                                         u64 max_tx_rate)
2242 {
2243         int speed = 0, ret = 0;
2244
2245         switch (adapter->link_speed) {
2246         case I40E_LINK_SPEED_40GB:
2247                 speed = 40000;
2248                 break;
2249         case I40E_LINK_SPEED_25GB:
2250                 speed = 25000;
2251                 break;
2252         case I40E_LINK_SPEED_20GB:
2253                 speed = 20000;
2254                 break;
2255         case I40E_LINK_SPEED_10GB:
2256                 speed = 10000;
2257                 break;
2258         case I40E_LINK_SPEED_1GB:
2259                 speed = 1000;
2260                 break;
2261         case I40E_LINK_SPEED_100MB:
2262                 speed = 100;
2263                 break;
2264         default:
2265                 break;
2266         }
2267
2268         if (max_tx_rate > speed) {
2269                 dev_err(&adapter->pdev->dev,
2270                         "Invalid tx rate specified\n");
2271                 ret = -EINVAL;
2272         }
2273
2274         return ret;
2275 }
2276
2277 /**
2278  * i40evf_validate_channel_config - validate queue mapping info
2279  * @adapter: board private structure
2280  * @mqprio_qopt: queue parameters
2281  *
2282  * This function validates if the config provided by the user to
2283  * configure queue channels is valid or not. Returns 0 on a valid
2284  * config.
2285  **/
2286 static int i40evf_validate_ch_config(struct i40evf_adapter *adapter,
2287                                      struct tc_mqprio_qopt_offload *mqprio_qopt)
2288 {
2289         u64 total_max_rate = 0;
2290         int i, num_qps = 0;
2291         u64 tx_rate = 0;
2292         int ret = 0;
2293
2294         if (mqprio_qopt->qopt.num_tc > I40EVF_MAX_TRAFFIC_CLASS ||
2295             mqprio_qopt->qopt.num_tc < 1)
2296                 return -EINVAL;
2297
2298         for (i = 0; i <= mqprio_qopt->qopt.num_tc - 1; i++) {
2299                 if (!mqprio_qopt->qopt.count[i] ||
2300                     mqprio_qopt->qopt.offset[i] != num_qps)
2301                         return -EINVAL;
2302                 if (mqprio_qopt->min_rate[i]) {
2303                         dev_err(&adapter->pdev->dev,
2304                                 "Invalid min tx rate (greater than 0) specified\n");
2305                         return -EINVAL;
2306                 }
2307                 /*convert to Mbps */
2308                 tx_rate = div_u64(mqprio_qopt->max_rate[i],
2309                                   I40EVF_MBPS_DIVISOR);
2310                 total_max_rate += tx_rate;
2311                 num_qps += mqprio_qopt->qopt.count[i];
2312         }
2313         if (num_qps > I40EVF_MAX_REQ_QUEUES)
2314                 return -EINVAL;
2315
2316         ret = i40evf_validate_tx_bandwidth(adapter, total_max_rate);
2317         return ret;
2318 }
2319
2320 /**
2321  * i40evf_del_all_cloud_filters - delete all cloud filters
2322  * on the traffic classes
2323  **/
2324 static void i40evf_del_all_cloud_filters(struct i40evf_adapter *adapter)
2325 {
2326         struct i40evf_cloud_filter *cf, *cftmp;
2327
2328         spin_lock_bh(&adapter->cloud_filter_list_lock);
2329         list_for_each_entry_safe(cf, cftmp, &adapter->cloud_filter_list,
2330                                  list) {
2331                 list_del(&cf->list);
2332                 kfree(cf);
2333                 adapter->num_cloud_filters--;
2334         }
2335         spin_unlock_bh(&adapter->cloud_filter_list_lock);
2336 }
2337
2338 /**
2339  * __i40evf_setup_tc - configure multiple traffic classes
2340  * @netdev: network interface device structure
2341  * @type_date: tc offload data
2342  *
2343  * This function processes the config information provided by the
2344  * user to configure traffic classes/queue channels and packages the
2345  * information to request the PF to setup traffic classes.
2346  *
2347  * Returns 0 on success.
2348  **/
2349 static int __i40evf_setup_tc(struct net_device *netdev, void *type_data)
2350 {
2351         struct tc_mqprio_qopt_offload *mqprio_qopt = type_data;
2352         struct i40evf_adapter *adapter = netdev_priv(netdev);
2353         struct virtchnl_vf_resource *vfres = adapter->vf_res;
2354         u8 num_tc = 0, total_qps = 0;
2355         int ret = 0, netdev_tc = 0;
2356         u64 max_tx_rate;
2357         u16 mode;
2358         int i;
2359
2360         num_tc = mqprio_qopt->qopt.num_tc;
2361         mode = mqprio_qopt->mode;
2362
2363         /* delete queue_channel */
2364         if (!mqprio_qopt->qopt.hw) {
2365                 if (adapter->ch_config.state == __I40EVF_TC_RUNNING) {
2366                         /* reset the tc configuration */
2367                         netdev_reset_tc(netdev);
2368                         adapter->num_tc = 0;
2369                         netif_tx_stop_all_queues(netdev);
2370                         netif_tx_disable(netdev);
2371                         i40evf_del_all_cloud_filters(adapter);
2372                         adapter->aq_required = I40EVF_FLAG_AQ_DISABLE_CHANNELS;
2373                         goto exit;
2374                 } else {
2375                         return -EINVAL;
2376                 }
2377         }
2378
2379         /* add queue channel */
2380         if (mode == TC_MQPRIO_MODE_CHANNEL) {
2381                 if (!(vfres->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_ADQ)) {
2382                         dev_err(&adapter->pdev->dev, "ADq not supported\n");
2383                         return -EOPNOTSUPP;
2384                 }
2385                 if (adapter->ch_config.state != __I40EVF_TC_INVALID) {
2386                         dev_err(&adapter->pdev->dev, "TC configuration already exists\n");
2387                         return -EINVAL;
2388                 }
2389
2390                 ret = i40evf_validate_ch_config(adapter, mqprio_qopt);
2391                 if (ret)
2392                         return ret;
2393                 /* Return if same TC config is requested */
2394                 if (adapter->num_tc == num_tc)
2395                         return 0;
2396                 adapter->num_tc = num_tc;
2397
2398                 for (i = 0; i < I40EVF_MAX_TRAFFIC_CLASS; i++) {
2399                         if (i < num_tc) {
2400                                 adapter->ch_config.ch_info[i].count =
2401                                         mqprio_qopt->qopt.count[i];
2402                                 adapter->ch_config.ch_info[i].offset =
2403                                         mqprio_qopt->qopt.offset[i];
2404                                 total_qps += mqprio_qopt->qopt.count[i];
2405                                 max_tx_rate = mqprio_qopt->max_rate[i];
2406                                 /* convert to Mbps */
2407                                 max_tx_rate = div_u64(max_tx_rate,
2408                                                       I40EVF_MBPS_DIVISOR);
2409                                 adapter->ch_config.ch_info[i].max_tx_rate =
2410                                         max_tx_rate;
2411                         } else {
2412                                 adapter->ch_config.ch_info[i].count = 1;
2413                                 adapter->ch_config.ch_info[i].offset = 0;
2414                         }
2415                 }
2416                 adapter->ch_config.total_qps = total_qps;
2417                 netif_tx_stop_all_queues(netdev);
2418                 netif_tx_disable(netdev);
2419                 adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_CHANNELS;
2420                 netdev_reset_tc(netdev);
2421                 /* Report the tc mapping up the stack */
2422                 netdev_set_num_tc(adapter->netdev, num_tc);
2423                 for (i = 0; i < I40EVF_MAX_TRAFFIC_CLASS; i++) {
2424                         u16 qcount = mqprio_qopt->qopt.count[i];
2425                         u16 qoffset = mqprio_qopt->qopt.offset[i];
2426
2427                         if (i < num_tc)
2428                                 netdev_set_tc_queue(netdev, netdev_tc++, qcount,
2429                                                     qoffset);
2430                 }
2431         }
2432 exit:
2433         return ret;
2434 }
2435
2436 /**
2437  * i40evf_parse_cls_flower - Parse tc flower filters provided by kernel
2438  * @adapter: board private structure
2439  * @cls_flower: pointer to struct tc_cls_flower_offload
2440  * @filter: pointer to cloud filter structure
2441  */
2442 static int i40evf_parse_cls_flower(struct i40evf_adapter *adapter,
2443                                    struct tc_cls_flower_offload *f,
2444                                    struct i40evf_cloud_filter *filter)
2445 {
2446         u16 n_proto_mask = 0;
2447         u16 n_proto_key = 0;
2448         u8 field_flags = 0;
2449         u16 addr_type = 0;
2450         u16 n_proto = 0;
2451         int i = 0;
2452         struct virtchnl_filter *vf = &filter->f;
2453
2454         if (f->dissector->used_keys &
2455             ~(BIT(FLOW_DISSECTOR_KEY_CONTROL) |
2456               BIT(FLOW_DISSECTOR_KEY_BASIC) |
2457               BIT(FLOW_DISSECTOR_KEY_ETH_ADDRS) |
2458               BIT(FLOW_DISSECTOR_KEY_VLAN) |
2459               BIT(FLOW_DISSECTOR_KEY_IPV4_ADDRS) |
2460               BIT(FLOW_DISSECTOR_KEY_IPV6_ADDRS) |
2461               BIT(FLOW_DISSECTOR_KEY_PORTS) |
2462               BIT(FLOW_DISSECTOR_KEY_ENC_KEYID))) {
2463                 dev_err(&adapter->pdev->dev, "Unsupported key used: 0x%x\n",
2464                         f->dissector->used_keys);
2465                 return -EOPNOTSUPP;
2466         }
2467
2468         if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ENC_KEYID)) {
2469                 struct flow_dissector_key_keyid *mask =
2470                         skb_flow_dissector_target(f->dissector,
2471                                                   FLOW_DISSECTOR_KEY_ENC_KEYID,
2472                                                   f->mask);
2473
2474                 if (mask->keyid != 0)
2475                         field_flags |= I40EVF_CLOUD_FIELD_TEN_ID;
2476         }
2477
2478         if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_BASIC)) {
2479                 struct flow_dissector_key_basic *key =
2480                         skb_flow_dissector_target(f->dissector,
2481                                                   FLOW_DISSECTOR_KEY_BASIC,
2482                                                   f->key);
2483
2484                 struct flow_dissector_key_basic *mask =
2485                         skb_flow_dissector_target(f->dissector,
2486                                                   FLOW_DISSECTOR_KEY_BASIC,
2487                                                   f->mask);
2488                 n_proto_key = ntohs(key->n_proto);
2489                 n_proto_mask = ntohs(mask->n_proto);
2490
2491                 if (n_proto_key == ETH_P_ALL) {
2492                         n_proto_key = 0;
2493                         n_proto_mask = 0;
2494                 }
2495                 n_proto = n_proto_key & n_proto_mask;
2496                 if (n_proto != ETH_P_IP && n_proto != ETH_P_IPV6)
2497                         return -EINVAL;
2498                 if (n_proto == ETH_P_IPV6) {
2499                         /* specify flow type as TCP IPv6 */
2500                         vf->flow_type = VIRTCHNL_TCP_V6_FLOW;
2501                 }
2502
2503                 if (key->ip_proto != IPPROTO_TCP) {
2504                         dev_info(&adapter->pdev->dev, "Only TCP transport is supported\n");
2505                         return -EINVAL;
2506                 }
2507         }
2508
2509         if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_ETH_ADDRS)) {
2510                 struct flow_dissector_key_eth_addrs *key =
2511                         skb_flow_dissector_target(f->dissector,
2512                                                   FLOW_DISSECTOR_KEY_ETH_ADDRS,
2513                                                   f->key);
2514
2515                 struct flow_dissector_key_eth_addrs *mask =
2516                         skb_flow_dissector_target(f->dissector,
2517                                                   FLOW_DISSECTOR_KEY_ETH_ADDRS,
2518                                                   f->mask);
2519                 /* use is_broadcast and is_zero to check for all 0xf or 0 */
2520                 if (!is_zero_ether_addr(mask->dst)) {
2521                         if (is_broadcast_ether_addr(mask->dst)) {
2522                                 field_flags |= I40EVF_CLOUD_FIELD_OMAC;
2523                         } else {
2524                                 dev_err(&adapter->pdev->dev, "Bad ether dest mask %pM\n",
2525                                         mask->dst);
2526                                 return I40E_ERR_CONFIG;
2527                         }
2528                 }
2529
2530                 if (!is_zero_ether_addr(mask->src)) {
2531                         if (is_broadcast_ether_addr(mask->src)) {
2532                                 field_flags |= I40EVF_CLOUD_FIELD_IMAC;
2533                         } else {
2534                                 dev_err(&adapter->pdev->dev, "Bad ether src mask %pM\n",
2535                                         mask->src);
2536                                 return I40E_ERR_CONFIG;
2537                         }
2538                 }
2539
2540                 if (!is_zero_ether_addr(key->dst))
2541                         if (is_valid_ether_addr(key->dst) ||
2542                             is_multicast_ether_addr(key->dst)) {
2543                                 /* set the mask if a valid dst_mac address */
2544                                 for (i = 0; i < ETH_ALEN; i++)
2545                                         vf->mask.tcp_spec.dst_mac[i] |= 0xff;
2546                                 ether_addr_copy(vf->data.tcp_spec.dst_mac,
2547                                                 key->dst);
2548                         }
2549
2550                 if (!is_zero_ether_addr(key->src))
2551                         if (is_valid_ether_addr(key->src) ||
2552                             is_multicast_ether_addr(key->src)) {
2553                                 /* set the mask if a valid dst_mac address */
2554                                 for (i = 0; i < ETH_ALEN; i++)
2555                                         vf->mask.tcp_spec.src_mac[i] |= 0xff;
2556                                 ether_addr_copy(vf->data.tcp_spec.src_mac,
2557                                                 key->src);
2558                 }
2559         }
2560
2561         if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_VLAN)) {
2562                 struct flow_dissector_key_vlan *key =
2563                         skb_flow_dissector_target(f->dissector,
2564                                                   FLOW_DISSECTOR_KEY_VLAN,
2565                                                   f->key);
2566                 struct flow_dissector_key_vlan *mask =
2567                         skb_flow_dissector_target(f->dissector,
2568                                                   FLOW_DISSECTOR_KEY_VLAN,
2569                                                   f->mask);
2570
2571                 if (mask->vlan_id) {
2572                         if (mask->vlan_id == VLAN_VID_MASK) {
2573                                 field_flags |= I40EVF_CLOUD_FIELD_IVLAN;
2574                         } else {
2575                                 dev_err(&adapter->pdev->dev, "Bad vlan mask %u\n",
2576                                         mask->vlan_id);
2577                                 return I40E_ERR_CONFIG;
2578                         }
2579                 }
2580                 vf->mask.tcp_spec.vlan_id |= cpu_to_be16(0xffff);
2581                 vf->data.tcp_spec.vlan_id = cpu_to_be16(key->vlan_id);
2582         }
2583
2584         if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_CONTROL)) {
2585                 struct flow_dissector_key_control *key =
2586                         skb_flow_dissector_target(f->dissector,
2587                                                   FLOW_DISSECTOR_KEY_CONTROL,
2588                                                   f->key);
2589
2590                 addr_type = key->addr_type;
2591         }
2592
2593         if (addr_type == FLOW_DISSECTOR_KEY_IPV4_ADDRS) {
2594                 struct flow_dissector_key_ipv4_addrs *key =
2595                         skb_flow_dissector_target(f->dissector,
2596                                                   FLOW_DISSECTOR_KEY_IPV4_ADDRS,
2597                                                   f->key);
2598                 struct flow_dissector_key_ipv4_addrs *mask =
2599                         skb_flow_dissector_target(f->dissector,
2600                                                   FLOW_DISSECTOR_KEY_IPV4_ADDRS,
2601                                                   f->mask);
2602
2603                 if (mask->dst) {
2604                         if (mask->dst == cpu_to_be32(0xffffffff)) {
2605                                 field_flags |= I40EVF_CLOUD_FIELD_IIP;
2606                         } else {
2607                                 dev_err(&adapter->pdev->dev, "Bad ip dst mask 0x%08x\n",
2608                                         be32_to_cpu(mask->dst));
2609                                 return I40E_ERR_CONFIG;
2610                         }
2611                 }
2612
2613                 if (mask->src) {
2614                         if (mask->src == cpu_to_be32(0xffffffff)) {
2615                                 field_flags |= I40EVF_CLOUD_FIELD_IIP;
2616                         } else {
2617                                 dev_err(&adapter->pdev->dev, "Bad ip src mask 0x%08x\n",
2618                                         be32_to_cpu(mask->dst));
2619                                 return I40E_ERR_CONFIG;
2620                         }
2621                 }
2622
2623                 if (field_flags & I40EVF_CLOUD_FIELD_TEN_ID) {
2624                         dev_info(&adapter->pdev->dev, "Tenant id not allowed for ip filter\n");
2625                         return I40E_ERR_CONFIG;
2626                 }
2627                 if (key->dst) {
2628                         vf->mask.tcp_spec.dst_ip[0] |= cpu_to_be32(0xffffffff);
2629                         vf->data.tcp_spec.dst_ip[0] = key->dst;
2630                 }
2631                 if (key->src) {
2632                         vf->mask.tcp_spec.src_ip[0] |= cpu_to_be32(0xffffffff);
2633                         vf->data.tcp_spec.src_ip[0] = key->src;
2634                 }
2635         }
2636
2637         if (addr_type == FLOW_DISSECTOR_KEY_IPV6_ADDRS) {
2638                 struct flow_dissector_key_ipv6_addrs *key =
2639                         skb_flow_dissector_target(f->dissector,
2640                                                   FLOW_DISSECTOR_KEY_IPV6_ADDRS,
2641                                                   f->key);
2642                 struct flow_dissector_key_ipv6_addrs *mask =
2643                         skb_flow_dissector_target(f->dissector,
2644                                                   FLOW_DISSECTOR_KEY_IPV6_ADDRS,
2645                                                   f->mask);
2646
2647                 /* validate mask, make sure it is not IPV6_ADDR_ANY */
2648                 if (ipv6_addr_any(&mask->dst)) {
2649                         dev_err(&adapter->pdev->dev, "Bad ipv6 dst mask 0x%02x\n",
2650                                 IPV6_ADDR_ANY);
2651                         return I40E_ERR_CONFIG;
2652                 }
2653
2654                 /* src and dest IPv6 address should not be LOOPBACK
2655                  * (0:0:0:0:0:0:0:1) which can be represented as ::1
2656                  */
2657                 if (ipv6_addr_loopback(&key->dst) ||
2658                     ipv6_addr_loopback(&key->src)) {
2659                         dev_err(&adapter->pdev->dev,
2660                                 "ipv6 addr should not be loopback\n");
2661                         return I40E_ERR_CONFIG;
2662                 }
2663                 if (!ipv6_addr_any(&mask->dst) || !ipv6_addr_any(&mask->src))
2664                         field_flags |= I40EVF_CLOUD_FIELD_IIP;
2665
2666                 for (i = 0; i < 4; i++)
2667                         vf->mask.tcp_spec.dst_ip[i] |= cpu_to_be32(0xffffffff);
2668                 memcpy(&vf->data.tcp_spec.dst_ip, &key->dst.s6_addr32,
2669                        sizeof(vf->data.tcp_spec.dst_ip));
2670                 for (i = 0; i < 4; i++)
2671                         vf->mask.tcp_spec.src_ip[i] |= cpu_to_be32(0xffffffff);
2672                 memcpy(&vf->data.tcp_spec.src_ip, &key->src.s6_addr32,
2673                        sizeof(vf->data.tcp_spec.src_ip));
2674         }
2675         if (dissector_uses_key(f->dissector, FLOW_DISSECTOR_KEY_PORTS)) {
2676                 struct flow_dissector_key_ports *key =
2677                         skb_flow_dissector_target(f->dissector,
2678                                                   FLOW_DISSECTOR_KEY_PORTS,
2679                                                   f->key);
2680                 struct flow_dissector_key_ports *mask =
2681                         skb_flow_dissector_target(f->dissector,
2682                                                   FLOW_DISSECTOR_KEY_PORTS,
2683                                                   f->mask);
2684
2685                 if (mask->src) {
2686                         if (mask->src == cpu_to_be16(0xffff)) {
2687                                 field_flags |= I40EVF_CLOUD_FIELD_IIP;
2688                         } else {
2689                                 dev_err(&adapter->pdev->dev, "Bad src port mask %u\n",
2690                                         be16_to_cpu(mask->src));
2691                                 return I40E_ERR_CONFIG;
2692                         }
2693                 }
2694
2695                 if (mask->dst) {
2696                         if (mask->dst == cpu_to_be16(0xffff)) {
2697                                 field_flags |= I40EVF_CLOUD_FIELD_IIP;
2698                         } else {
2699                                 dev_err(&adapter->pdev->dev, "Bad dst port mask %u\n",
2700                                         be16_to_cpu(mask->dst));
2701                                 return I40E_ERR_CONFIG;
2702                         }
2703                 }
2704                 if (key->dst) {
2705                         vf->mask.tcp_spec.dst_port |= cpu_to_be16(0xffff);
2706                         vf->data.tcp_spec.dst_port = key->dst;
2707                 }
2708
2709                 if (key->src) {
2710                         vf->mask.tcp_spec.src_port |= cpu_to_be16(0xffff);
2711                         vf->data.tcp_spec.src_port = key->src;
2712                 }
2713         }
2714         vf->field_flags = field_flags;
2715
2716         return 0;
2717 }
2718
2719 /**
2720  * i40evf_handle_tclass - Forward to a traffic class on the device
2721  * @adapter: board private structure
2722  * @tc: traffic class index on the device
2723  * @filter: pointer to cloud filter structure
2724  */
2725 static int i40evf_handle_tclass(struct i40evf_adapter *adapter, u32 tc,
2726                                 struct i40evf_cloud_filter *filter)
2727 {
2728         if (tc == 0)
2729                 return 0;
2730         if (tc < adapter->num_tc) {
2731                 if (!filter->f.data.tcp_spec.dst_port) {
2732                         dev_err(&adapter->pdev->dev,
2733                                 "Specify destination port to redirect to traffic class other than TC0\n");
2734                         return -EINVAL;
2735                 }
2736         }
2737         /* redirect to a traffic class on the same device */
2738         filter->f.action = VIRTCHNL_ACTION_TC_REDIRECT;
2739         filter->f.action_meta = tc;
2740         return 0;
2741 }
2742
2743 /**
2744  * i40evf_configure_clsflower - Add tc flower filters
2745  * @adapter: board private structure
2746  * @cls_flower: Pointer to struct tc_cls_flower_offload
2747  */
2748 static int i40evf_configure_clsflower(struct i40evf_adapter *adapter,
2749                                       struct tc_cls_flower_offload *cls_flower)
2750 {
2751         int tc = tc_classid_to_hwtc(adapter->netdev, cls_flower->classid);
2752         struct i40evf_cloud_filter *filter = NULL;
2753         int err = -EINVAL, count = 50;
2754
2755         if (tc < 0) {
2756                 dev_err(&adapter->pdev->dev, "Invalid traffic class\n");
2757                 return -EINVAL;
2758         }
2759
2760         filter = kzalloc(sizeof(*filter), GFP_KERNEL);
2761         if (!filter)
2762                 return -ENOMEM;
2763
2764         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
2765                                 &adapter->crit_section)) {
2766                 if (--count == 0)
2767                         goto err;
2768                 udelay(1);
2769         }
2770
2771         filter->cookie = cls_flower->cookie;
2772
2773         /* set the mask to all zeroes to begin with */
2774         memset(&filter->f.mask.tcp_spec, 0, sizeof(struct virtchnl_l4_spec));
2775         /* start out with flow type and eth type IPv4 to begin with */
2776         filter->f.flow_type = VIRTCHNL_TCP_V4_FLOW;
2777         err = i40evf_parse_cls_flower(adapter, cls_flower, filter);
2778         if (err < 0)
2779                 goto err;
2780
2781         err = i40evf_handle_tclass(adapter, tc, filter);
2782         if (err < 0)
2783                 goto err;
2784
2785         /* add filter to the list */
2786         spin_lock_bh(&adapter->cloud_filter_list_lock);
2787         list_add_tail(&filter->list, &adapter->cloud_filter_list);
2788         adapter->num_cloud_filters++;
2789         filter->add = true;
2790         adapter->aq_required |= I40EVF_FLAG_AQ_ADD_CLOUD_FILTER;
2791         spin_unlock_bh(&adapter->cloud_filter_list_lock);
2792 err:
2793         if (err)
2794                 kfree(filter);
2795
2796         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
2797         return err;
2798 }
2799
2800 /* i40evf_find_cf - Find the cloud filter in the list
2801  * @adapter: Board private structure
2802  * @cookie: filter specific cookie
2803  *
2804  * Returns ptr to the filter object or NULL. Must be called while holding the
2805  * cloud_filter_list_lock.
2806  */
2807 static struct i40evf_cloud_filter *i40evf_find_cf(struct i40evf_adapter *adapter,
2808                                                   unsigned long *cookie)
2809 {
2810         struct i40evf_cloud_filter *filter = NULL;
2811
2812         if (!cookie)
2813                 return NULL;
2814
2815         list_for_each_entry(filter, &adapter->cloud_filter_list, list) {
2816                 if (!memcmp(cookie, &filter->cookie, sizeof(filter->cookie)))
2817                         return filter;
2818         }
2819         return NULL;
2820 }
2821
2822 /**
2823  * i40evf_delete_clsflower - Remove tc flower filters
2824  * @adapter: board private structure
2825  * @cls_flower: Pointer to struct tc_cls_flower_offload
2826  */
2827 static int i40evf_delete_clsflower(struct i40evf_adapter *adapter,
2828                                    struct tc_cls_flower_offload *cls_flower)
2829 {
2830         struct i40evf_cloud_filter *filter = NULL;
2831         int err = 0;
2832
2833         spin_lock_bh(&adapter->cloud_filter_list_lock);
2834         filter = i40evf_find_cf(adapter, &cls_flower->cookie);
2835         if (filter) {
2836                 filter->del = true;
2837                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_CLOUD_FILTER;
2838         } else {
2839                 err = -EINVAL;
2840         }
2841         spin_unlock_bh(&adapter->cloud_filter_list_lock);
2842
2843         return err;
2844 }
2845
2846 /**
2847  * i40evf_setup_tc_cls_flower - flower classifier offloads
2848  * @netdev: net device to configure
2849  * @type_data: offload data
2850  */
2851 static int i40evf_setup_tc_cls_flower(struct i40evf_adapter *adapter,
2852                                       struct tc_cls_flower_offload *cls_flower)
2853 {
2854         if (cls_flower->common.chain_index)
2855                 return -EOPNOTSUPP;
2856
2857         switch (cls_flower->command) {
2858         case TC_CLSFLOWER_REPLACE:
2859                 return i40evf_configure_clsflower(adapter, cls_flower);
2860         case TC_CLSFLOWER_DESTROY:
2861                 return i40evf_delete_clsflower(adapter, cls_flower);
2862         case TC_CLSFLOWER_STATS:
2863                 return -EOPNOTSUPP;
2864         default:
2865                 return -EOPNOTSUPP;
2866         }
2867 }
2868
2869 /**
2870  * i40evf_setup_tc_block_cb - block callback for tc
2871  * @type: type of offload
2872  * @type_data: offload data
2873  * @cb_priv:
2874  *
2875  * This function is the block callback for traffic classes
2876  **/
2877 static int i40evf_setup_tc_block_cb(enum tc_setup_type type, void *type_data,
2878                                     void *cb_priv)
2879 {
2880         switch (type) {
2881         case TC_SETUP_CLSFLOWER:
2882                 return i40evf_setup_tc_cls_flower(cb_priv, type_data);
2883         default:
2884                 return -EOPNOTSUPP;
2885         }
2886 }
2887
2888 /**
2889  * i40evf_setup_tc_block - register callbacks for tc
2890  * @netdev: network interface device structure
2891  * @f: tc offload data
2892  *
2893  * This function registers block callbacks for tc
2894  * offloads
2895  **/
2896 static int i40evf_setup_tc_block(struct net_device *dev,
2897                                  struct tc_block_offload *f)
2898 {
2899         struct i40evf_adapter *adapter = netdev_priv(dev);
2900
2901         if (f->binder_type != TCF_BLOCK_BINDER_TYPE_CLSACT_INGRESS)
2902                 return -EOPNOTSUPP;
2903
2904         switch (f->command) {
2905         case TC_BLOCK_BIND:
2906                 return tcf_block_cb_register(f->block, i40evf_setup_tc_block_cb,
2907                                              adapter, adapter, f->extack);
2908         case TC_BLOCK_UNBIND:
2909                 tcf_block_cb_unregister(f->block, i40evf_setup_tc_block_cb,
2910                                         adapter);
2911                 return 0;
2912         default:
2913                 return -EOPNOTSUPP;
2914         }
2915 }
2916
2917 /**
2918  * i40evf_setup_tc - configure multiple traffic classes
2919  * @netdev: network interface device structure
2920  * @type: type of offload
2921  * @type_date: tc offload data
2922  *
2923  * This function is the callback to ndo_setup_tc in the
2924  * netdev_ops.
2925  *
2926  * Returns 0 on success
2927  **/
2928 static int i40evf_setup_tc(struct net_device *netdev, enum tc_setup_type type,
2929                            void *type_data)
2930 {
2931         switch (type) {
2932         case TC_SETUP_QDISC_MQPRIO:
2933                 return __i40evf_setup_tc(netdev, type_data);
2934         case TC_SETUP_BLOCK:
2935                 return i40evf_setup_tc_block(netdev, type_data);
2936         default:
2937                 return -EOPNOTSUPP;
2938         }
2939 }
2940
2941 /**
2942  * i40evf_open - Called when a network interface is made active
2943  * @netdev: network interface device structure
2944  *
2945  * Returns 0 on success, negative value on failure
2946  *
2947  * The open entry point is called when a network interface is made
2948  * active by the system (IFF_UP).  At this point all resources needed
2949  * for transmit and receive operations are allocated, the interrupt
2950  * handler is registered with the OS, the watchdog timer is started,
2951  * and the stack is notified that the interface is ready.
2952  **/
2953 static int i40evf_open(struct net_device *netdev)
2954 {
2955         struct i40evf_adapter *adapter = netdev_priv(netdev);
2956         int err;
2957
2958         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
2959                 dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
2960                 return -EIO;
2961         }
2962
2963         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
2964                                 &adapter->crit_section))
2965                 usleep_range(500, 1000);
2966
2967         if (adapter->state != __I40EVF_DOWN) {
2968                 err = -EBUSY;
2969                 goto err_unlock;
2970         }
2971
2972         /* allocate transmit descriptors */
2973         err = i40evf_setup_all_tx_resources(adapter);
2974         if (err)
2975                 goto err_setup_tx;
2976
2977         /* allocate receive descriptors */
2978         err = i40evf_setup_all_rx_resources(adapter);
2979         if (err)
2980                 goto err_setup_rx;
2981
2982         /* clear any pending interrupts, may auto mask */
2983         err = i40evf_request_traffic_irqs(adapter, netdev->name);
2984         if (err)
2985                 goto err_req_irq;
2986
2987         spin_lock_bh(&adapter->mac_vlan_list_lock);
2988
2989         i40evf_add_filter(adapter, adapter->hw.mac.addr);
2990
2991         spin_unlock_bh(&adapter->mac_vlan_list_lock);
2992
2993         i40evf_configure(adapter);
2994
2995         i40evf_up_complete(adapter);
2996
2997         i40evf_irq_enable(adapter, true);
2998
2999         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
3000
3001         return 0;
3002
3003 err_req_irq:
3004         i40evf_down(adapter);
3005         i40evf_free_traffic_irqs(adapter);
3006 err_setup_rx:
3007         i40evf_free_all_rx_resources(adapter);
3008 err_setup_tx:
3009         i40evf_free_all_tx_resources(adapter);
3010 err_unlock:
3011         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
3012
3013         return err;
3014 }
3015
3016 /**
3017  * i40evf_close - Disables a network interface
3018  * @netdev: network interface device structure
3019  *
3020  * Returns 0, this is not allowed to fail
3021  *
3022  * The close entry point is called when an interface is de-activated
3023  * by the OS.  The hardware is still under the drivers control, but
3024  * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
3025  * are freed, along with all transmit and receive resources.
3026  **/
3027 static int i40evf_close(struct net_device *netdev)
3028 {
3029         struct i40evf_adapter *adapter = netdev_priv(netdev);
3030         int status;
3031
3032         if (adapter->state <= __I40EVF_DOWN_PENDING)
3033                 return 0;
3034
3035         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
3036                                 &adapter->crit_section))
3037                 usleep_range(500, 1000);
3038
3039         set_bit(__I40E_VSI_DOWN, adapter->vsi.state);
3040         if (CLIENT_ENABLED(adapter))
3041                 adapter->flags |= I40EVF_FLAG_CLIENT_NEEDS_CLOSE;
3042
3043         i40evf_down(adapter);
3044         adapter->state = __I40EVF_DOWN_PENDING;
3045         i40evf_free_traffic_irqs(adapter);
3046
3047         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
3048
3049         /* We explicitly don't free resources here because the hardware is
3050          * still active and can DMA into memory. Resources are cleared in
3051          * i40evf_virtchnl_completion() after we get confirmation from the PF
3052          * driver that the rings have been stopped.
3053          *
3054          * Also, we wait for state to transition to __I40EVF_DOWN before
3055          * returning. State change occurs in i40evf_virtchnl_completion() after
3056          * VF resources are released (which occurs after PF driver processes and
3057          * responds to admin queue commands).
3058          */
3059
3060         status = wait_event_timeout(adapter->down_waitqueue,
3061                                     adapter->state == __I40EVF_DOWN,
3062                                     msecs_to_jiffies(200));
3063         if (!status)
3064                 netdev_warn(netdev, "Device resources not yet released\n");
3065         return 0;
3066 }
3067
3068 /**
3069  * i40evf_change_mtu - Change the Maximum Transfer Unit
3070  * @netdev: network interface device structure
3071  * @new_mtu: new value for maximum frame size
3072  *
3073  * Returns 0 on success, negative on failure
3074  **/
3075 static int i40evf_change_mtu(struct net_device *netdev, int new_mtu)
3076 {
3077         struct i40evf_adapter *adapter = netdev_priv(netdev);
3078
3079         netdev->mtu = new_mtu;
3080         if (CLIENT_ENABLED(adapter)) {
3081                 i40evf_notify_client_l2_params(&adapter->vsi);
3082                 adapter->flags |= I40EVF_FLAG_SERVICE_CLIENT_REQUESTED;
3083         }
3084         adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
3085         schedule_work(&adapter->reset_task);
3086
3087         return 0;
3088 }
3089
3090 /**
3091  * i40e_set_features - set the netdev feature flags
3092  * @netdev: ptr to the netdev being adjusted
3093  * @features: the feature set that the stack is suggesting
3094  * Note: expects to be called while under rtnl_lock()
3095  **/
3096 static int i40evf_set_features(struct net_device *netdev,
3097                                netdev_features_t features)
3098 {
3099         struct i40evf_adapter *adapter = netdev_priv(netdev);
3100
3101         /* Don't allow changing VLAN_RX flag when adapter is not capable
3102          * of VLAN offload
3103          */
3104         if (!VLAN_ALLOWED(adapter)) {
3105                 if ((netdev->features ^ features) & NETIF_F_HW_VLAN_CTAG_RX)
3106                         return -EINVAL;
3107         } else if ((netdev->features ^ features) & NETIF_F_HW_VLAN_CTAG_RX) {
3108                 if (features & NETIF_F_HW_VLAN_CTAG_RX)
3109                         adapter->aq_required |=
3110                                 I40EVF_FLAG_AQ_ENABLE_VLAN_STRIPPING;
3111                 else
3112                         adapter->aq_required |=
3113                                 I40EVF_FLAG_AQ_DISABLE_VLAN_STRIPPING;
3114         }
3115
3116         return 0;
3117 }
3118
3119 /**
3120  * i40evf_features_check - Validate encapsulated packet conforms to limits
3121  * @skb: skb buff
3122  * @dev: This physical port's netdev
3123  * @features: Offload features that the stack believes apply
3124  **/
3125 static netdev_features_t i40evf_features_check(struct sk_buff *skb,
3126                                                struct net_device *dev,
3127                                                netdev_features_t features)
3128 {
3129         size_t len;
3130
3131         /* No point in doing any of this if neither checksum nor GSO are
3132          * being requested for this frame.  We can rule out both by just
3133          * checking for CHECKSUM_PARTIAL
3134          */
3135         if (skb->ip_summed != CHECKSUM_PARTIAL)
3136                 return features;
3137
3138         /* We cannot support GSO if the MSS is going to be less than
3139          * 64 bytes.  If it is then we need to drop support for GSO.
3140          */
3141         if (skb_is_gso(skb) && (skb_shinfo(skb)->gso_size < 64))
3142                 features &= ~NETIF_F_GSO_MASK;
3143
3144         /* MACLEN can support at most 63 words */
3145         len = skb_network_header(skb) - skb->data;
3146         if (len & ~(63 * 2))
3147                 goto out_err;
3148
3149         /* IPLEN and EIPLEN can support at most 127 dwords */
3150         len = skb_transport_header(skb) - skb_network_header(skb);
3151         if (len & ~(127 * 4))
3152                 goto out_err;
3153
3154         if (skb->encapsulation) {
3155                 /* L4TUNLEN can support 127 words */
3156                 len = skb_inner_network_header(skb) - skb_transport_header(skb);
3157                 if (len & ~(127 * 2))
3158                         goto out_err;
3159
3160                 /* IPLEN can support at most 127 dwords */
3161                 len = skb_inner_transport_header(skb) -
3162                       skb_inner_network_header(skb);
3163                 if (len & ~(127 * 4))
3164                         goto out_err;
3165         }
3166
3167         /* No need to validate L4LEN as TCP is the only protocol with a
3168          * a flexible value and we support all possible values supported
3169          * by TCP, which is at most 15 dwords
3170          */
3171
3172         return features;
3173 out_err:
3174         return features & ~(NETIF_F_CSUM_MASK | NETIF_F_GSO_MASK);
3175 }
3176
3177 /**
3178  * i40evf_fix_features - fix up the netdev feature bits
3179  * @netdev: our net device
3180  * @features: desired feature bits
3181  *
3182  * Returns fixed-up features bits
3183  **/
3184 static netdev_features_t i40evf_fix_features(struct net_device *netdev,
3185                                              netdev_features_t features)
3186 {
3187         struct i40evf_adapter *adapter = netdev_priv(netdev);
3188
3189         if (adapter->vf_res &&
3190             !(adapter->vf_res->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_VLAN))
3191                 features &= ~(NETIF_F_HW_VLAN_CTAG_TX |
3192                               NETIF_F_HW_VLAN_CTAG_RX |
3193                               NETIF_F_HW_VLAN_CTAG_FILTER);
3194
3195         return features;
3196 }
3197
3198 static const struct net_device_ops i40evf_netdev_ops = {
3199         .ndo_open               = i40evf_open,
3200         .ndo_stop               = i40evf_close,
3201         .ndo_start_xmit         = i40evf_xmit_frame,
3202         .ndo_set_rx_mode        = i40evf_set_rx_mode,
3203         .ndo_validate_addr      = eth_validate_addr,
3204         .ndo_set_mac_address    = i40evf_set_mac,
3205         .ndo_change_mtu         = i40evf_change_mtu,
3206         .ndo_tx_timeout         = i40evf_tx_timeout,
3207         .ndo_vlan_rx_add_vid    = i40evf_vlan_rx_add_vid,
3208         .ndo_vlan_rx_kill_vid   = i40evf_vlan_rx_kill_vid,
3209         .ndo_features_check     = i40evf_features_check,
3210         .ndo_fix_features       = i40evf_fix_features,
3211         .ndo_set_features       = i40evf_set_features,
3212         .ndo_setup_tc           = i40evf_setup_tc,
3213 };
3214
3215 /**
3216  * i40evf_check_reset_complete - check that VF reset is complete
3217  * @hw: pointer to hw struct
3218  *
3219  * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
3220  **/
3221 static int i40evf_check_reset_complete(struct i40e_hw *hw)
3222 {
3223         u32 rstat;
3224         int i;
3225
3226         for (i = 0; i < 100; i++) {
3227                 rstat = rd32(hw, I40E_VFGEN_RSTAT) &
3228                             I40E_VFGEN_RSTAT_VFR_STATE_MASK;
3229                 if ((rstat == VIRTCHNL_VFR_VFACTIVE) ||
3230                     (rstat == VIRTCHNL_VFR_COMPLETED))
3231                         return 0;
3232                 usleep_range(10, 20);
3233         }
3234         return -EBUSY;
3235 }
3236
3237 /**
3238  * i40evf_process_config - Process the config information we got from the PF
3239  * @adapter: board private structure
3240  *
3241  * Verify that we have a valid config struct, and set up our netdev features
3242  * and our VSI struct.
3243  **/
3244 int i40evf_process_config(struct i40evf_adapter *adapter)
3245 {
3246         struct virtchnl_vf_resource *vfres = adapter->vf_res;
3247         int i, num_req_queues = adapter->num_req_queues;
3248         struct net_device *netdev = adapter->netdev;
3249         struct i40e_vsi *vsi = &adapter->vsi;
3250         netdev_features_t hw_enc_features;
3251         netdev_features_t hw_features;
3252
3253         /* got VF config message back from PF, now we can parse it */
3254         for (i = 0; i < vfres->num_vsis; i++) {
3255                 if (vfres->vsi_res[i].vsi_type == VIRTCHNL_VSI_SRIOV)
3256                         adapter->vsi_res = &vfres->vsi_res[i];
3257         }
3258         if (!adapter->vsi_res) {
3259                 dev_err(&adapter->pdev->dev, "No LAN VSI found\n");
3260                 return -ENODEV;
3261         }
3262
3263         if (num_req_queues &&
3264             num_req_queues != adapter->vsi_res->num_queue_pairs) {
3265                 /* Problem.  The PF gave us fewer queues than what we had
3266                  * negotiated in our request.  Need a reset to see if we can't
3267                  * get back to a working state.
3268                  */
3269                 dev_err(&adapter->pdev->dev,
3270                         "Requested %d queues, but PF only gave us %d.\n",
3271                         num_req_queues,
3272                         adapter->vsi_res->num_queue_pairs);
3273                 adapter->flags |= I40EVF_FLAG_REINIT_ITR_NEEDED;
3274                 adapter->num_req_queues = adapter->vsi_res->num_queue_pairs;
3275                 i40evf_schedule_reset(adapter);
3276                 return -ENODEV;
3277         }
3278         adapter->num_req_queues = 0;
3279
3280         hw_enc_features = NETIF_F_SG                    |
3281                           NETIF_F_IP_CSUM               |
3282                           NETIF_F_IPV6_CSUM             |
3283                           NETIF_F_HIGHDMA               |
3284                           NETIF_F_SOFT_FEATURES |
3285                           NETIF_F_TSO                   |
3286                           NETIF_F_TSO_ECN               |
3287                           NETIF_F_TSO6                  |
3288                           NETIF_F_SCTP_CRC              |
3289                           NETIF_F_RXHASH                |
3290                           NETIF_F_RXCSUM                |
3291                           0;
3292
3293         /* advertise to stack only if offloads for encapsulated packets is
3294          * supported
3295          */
3296         if (vfres->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_ENCAP) {
3297                 hw_enc_features |= NETIF_F_GSO_UDP_TUNNEL       |
3298                                    NETIF_F_GSO_GRE              |
3299                                    NETIF_F_GSO_GRE_CSUM         |
3300                                    NETIF_F_GSO_IPXIP4           |
3301                                    NETIF_F_GSO_IPXIP6           |
3302                                    NETIF_F_GSO_UDP_TUNNEL_CSUM  |
3303                                    NETIF_F_GSO_PARTIAL          |
3304                                    0;
3305
3306                 if (!(vfres->vf_cap_flags &
3307                       VIRTCHNL_VF_OFFLOAD_ENCAP_CSUM))
3308                         netdev->gso_partial_features |=
3309                                 NETIF_F_GSO_UDP_TUNNEL_CSUM;
3310
3311                 netdev->gso_partial_features |= NETIF_F_GSO_GRE_CSUM;
3312                 netdev->hw_enc_features |= NETIF_F_TSO_MANGLEID;
3313                 netdev->hw_enc_features |= hw_enc_features;
3314         }
3315         /* record features VLANs can make use of */
3316         netdev->vlan_features |= hw_enc_features | NETIF_F_TSO_MANGLEID;
3317
3318         /* Write features and hw_features separately to avoid polluting
3319          * with, or dropping, features that are set when we registered.
3320          */
3321         hw_features = hw_enc_features;
3322
3323         /* Enable VLAN features if supported */
3324         if (vfres->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_VLAN)
3325                 hw_features |= (NETIF_F_HW_VLAN_CTAG_TX |
3326                                 NETIF_F_HW_VLAN_CTAG_RX);
3327         /* Enable cloud filter if ADQ is supported */
3328         if (vfres->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_ADQ)
3329                 hw_features |= NETIF_F_HW_TC;
3330
3331         netdev->hw_features |= hw_features;
3332
3333         netdev->features |= hw_features;
3334
3335         if (vfres->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_VLAN)
3336                 netdev->features |= NETIF_F_HW_VLAN_CTAG_FILTER;
3337
3338         netdev->priv_flags |= IFF_UNICAST_FLT;
3339
3340         /* Do not turn on offloads when they are requested to be turned off.
3341          * TSO needs minimum 576 bytes to work correctly.
3342          */
3343         if (netdev->wanted_features) {
3344                 if (!(netdev->wanted_features & NETIF_F_TSO) ||
3345                     netdev->mtu < 576)
3346                         netdev->features &= ~NETIF_F_TSO;
3347                 if (!(netdev->wanted_features & NETIF_F_TSO6) ||
3348                     netdev->mtu < 576)
3349                         netdev->features &= ~NETIF_F_TSO6;
3350                 if (!(netdev->wanted_features & NETIF_F_TSO_ECN))
3351                         netdev->features &= ~NETIF_F_TSO_ECN;
3352                 if (!(netdev->wanted_features & NETIF_F_GRO))
3353                         netdev->features &= ~NETIF_F_GRO;
3354                 if (!(netdev->wanted_features & NETIF_F_GSO))
3355                         netdev->features &= ~NETIF_F_GSO;
3356         }
3357
3358         adapter->vsi.id = adapter->vsi_res->vsi_id;
3359
3360         adapter->vsi.back = adapter;
3361         adapter->vsi.base_vector = 1;
3362         adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
3363         vsi->netdev = adapter->netdev;
3364         vsi->qs_handle = adapter->vsi_res->qset_handle;
3365         if (vfres->vf_cap_flags & VIRTCHNL_VF_OFFLOAD_RSS_PF) {
3366                 adapter->rss_key_size = vfres->rss_key_size;
3367                 adapter->rss_lut_size = vfres->rss_lut_size;
3368         } else {
3369                 adapter->rss_key_size = I40EVF_HKEY_ARRAY_SIZE;
3370                 adapter->rss_lut_size = I40EVF_HLUT_ARRAY_SIZE;
3371         }
3372
3373         return 0;
3374 }
3375
3376 /**
3377  * i40evf_init_task - worker thread to perform delayed initialization
3378  * @work: pointer to work_struct containing our data
3379  *
3380  * This task completes the work that was begun in probe. Due to the nature
3381  * of VF-PF communications, we may need to wait tens of milliseconds to get
3382  * responses back from the PF. Rather than busy-wait in probe and bog down the
3383  * whole system, we'll do it in a task so we can sleep.
3384  * This task only runs during driver init. Once we've established
3385  * communications with the PF driver and set up our netdev, the watchdog
3386  * takes over.
3387  **/
3388 static void i40evf_init_task(struct work_struct *work)
3389 {
3390         struct i40evf_adapter *adapter = container_of(work,
3391                                                       struct i40evf_adapter,
3392                                                       init_task.work);
3393         struct net_device *netdev = adapter->netdev;
3394         struct i40e_hw *hw = &adapter->hw;
3395         struct pci_dev *pdev = adapter->pdev;
3396         int err, bufsz;
3397
3398         switch (adapter->state) {
3399         case __I40EVF_STARTUP:
3400                 /* driver loaded, probe complete */
3401                 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
3402                 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
3403                 err = i40e_set_mac_type(hw);
3404                 if (err) {
3405                         dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
3406                                 err);
3407                         goto err;
3408                 }
3409                 err = i40evf_check_reset_complete(hw);
3410                 if (err) {
3411                         dev_info(&pdev->dev, "Device is still in reset (%d), retrying\n",
3412                                  err);
3413                         goto err;
3414                 }
3415                 hw->aq.num_arq_entries = I40EVF_AQ_LEN;
3416                 hw->aq.num_asq_entries = I40EVF_AQ_LEN;
3417                 hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
3418                 hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
3419
3420                 err = i40evf_init_adminq(hw);
3421                 if (err) {
3422                         dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
3423                                 err);
3424                         goto err;
3425                 }
3426                 err = i40evf_send_api_ver(adapter);
3427                 if (err) {
3428                         dev_err(&pdev->dev, "Unable to send to PF (%d)\n", err);
3429                         i40evf_shutdown_adminq(hw);
3430                         goto err;
3431                 }
3432                 adapter->state = __I40EVF_INIT_VERSION_CHECK;
3433                 goto restart;
3434         case __I40EVF_INIT_VERSION_CHECK:
3435                 if (!i40evf_asq_done(hw)) {
3436                         dev_err(&pdev->dev, "Admin queue command never completed\n");
3437                         i40evf_shutdown_adminq(hw);
3438                         adapter->state = __I40EVF_STARTUP;
3439                         goto err;
3440                 }
3441
3442                 /* aq msg sent, awaiting reply */
3443                 err = i40evf_verify_api_ver(adapter);
3444                 if (err) {
3445                         if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
3446                                 err = i40evf_send_api_ver(adapter);
3447                         else
3448                                 dev_err(&pdev->dev, "Unsupported PF API version %d.%d, expected %d.%d\n",
3449                                         adapter->pf_version.major,
3450                                         adapter->pf_version.minor,
3451                                         VIRTCHNL_VERSION_MAJOR,
3452                                         VIRTCHNL_VERSION_MINOR);
3453                         goto err;
3454                 }
3455                 err = i40evf_send_vf_config_msg(adapter);
3456                 if (err) {
3457                         dev_err(&pdev->dev, "Unable to send config request (%d)\n",
3458                                 err);
3459                         goto err;
3460                 }
3461                 adapter->state = __I40EVF_INIT_GET_RESOURCES;
3462                 goto restart;
3463         case __I40EVF_INIT_GET_RESOURCES:
3464                 /* aq msg sent, awaiting reply */
3465                 if (!adapter->vf_res) {
3466                         bufsz = sizeof(struct virtchnl_vf_resource) +
3467                                 (I40E_MAX_VF_VSI *
3468                                  sizeof(struct virtchnl_vsi_resource));
3469                         adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
3470                         if (!adapter->vf_res)
3471                                 goto err;
3472                 }
3473                 err = i40evf_get_vf_config(adapter);
3474                 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK) {
3475                         err = i40evf_send_vf_config_msg(adapter);
3476                         goto err;
3477                 } else if (err == I40E_ERR_PARAM) {
3478                         /* We only get ERR_PARAM if the device is in a very bad
3479                          * state or if we've been disabled for previous bad
3480                          * behavior. Either way, we're done now.
3481                          */
3482                         i40evf_shutdown_adminq(hw);
3483                         dev_err(&pdev->dev, "Unable to get VF config due to PF error condition, not retrying\n");
3484                         return;
3485                 }
3486                 if (err) {
3487                         dev_err(&pdev->dev, "Unable to get VF config (%d)\n",
3488                                 err);
3489                         goto err_alloc;
3490                 }
3491                 adapter->state = __I40EVF_INIT_SW;
3492                 break;
3493         default:
3494                 goto err_alloc;
3495         }
3496
3497         if (i40evf_process_config(adapter))
3498                 goto err_alloc;
3499         adapter->current_op = VIRTCHNL_OP_UNKNOWN;
3500
3501         adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
3502
3503         netdev->netdev_ops = &i40evf_netdev_ops;
3504         i40evf_set_ethtool_ops(netdev);
3505         netdev->watchdog_timeo = 5 * HZ;
3506
3507         /* MTU range: 68 - 9710 */
3508         netdev->min_mtu = ETH_MIN_MTU;
3509         netdev->max_mtu = I40E_MAX_RXBUFFER - I40E_PACKET_HDR_PAD;
3510
3511         if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
3512                 dev_info(&pdev->dev, "Invalid MAC address %pM, using random\n",
3513                          adapter->hw.mac.addr);
3514                 eth_hw_addr_random(netdev);
3515                 ether_addr_copy(adapter->hw.mac.addr, netdev->dev_addr);
3516         } else {
3517                 adapter->flags |= I40EVF_FLAG_ADDR_SET_BY_PF;
3518                 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
3519                 ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
3520         }
3521
3522         timer_setup(&adapter->watchdog_timer, i40evf_watchdog_timer, 0);
3523         mod_timer(&adapter->watchdog_timer, jiffies + 1);
3524
3525         adapter->tx_desc_count = I40EVF_DEFAULT_TXD;
3526         adapter->rx_desc_count = I40EVF_DEFAULT_RXD;
3527         err = i40evf_init_interrupt_scheme(adapter);
3528         if (err)
3529                 goto err_sw_init;
3530         i40evf_map_rings_to_vectors(adapter);
3531         if (adapter->vf_res->vf_cap_flags &
3532             VIRTCHNL_VF_OFFLOAD_WB_ON_ITR)
3533                 adapter->flags |= I40EVF_FLAG_WB_ON_ITR_CAPABLE;
3534
3535         err = i40evf_request_misc_irq(adapter);
3536         if (err)
3537                 goto err_sw_init;
3538
3539         netif_carrier_off(netdev);
3540         adapter->link_up = false;
3541
3542         if (!adapter->netdev_registered) {
3543                 err = register_netdev(netdev);
3544                 if (err)
3545                         goto err_register;
3546         }
3547
3548         adapter->netdev_registered = true;
3549
3550         netif_tx_stop_all_queues(netdev);
3551         if (CLIENT_ALLOWED(adapter)) {
3552                 err = i40evf_lan_add_device(adapter);
3553                 if (err)
3554                         dev_info(&pdev->dev, "Failed to add VF to client API service list: %d\n",
3555                                  err);
3556         }
3557
3558         dev_info(&pdev->dev, "MAC address: %pM\n", adapter->hw.mac.addr);
3559         if (netdev->features & NETIF_F_GRO)
3560                 dev_info(&pdev->dev, "GRO is enabled\n");
3561
3562         adapter->state = __I40EVF_DOWN;
3563         set_bit(__I40E_VSI_DOWN, adapter->vsi.state);
3564         i40evf_misc_irq_enable(adapter);
3565         wake_up(&adapter->down_waitqueue);
3566
3567         adapter->rss_key = kzalloc(adapter->rss_key_size, GFP_KERNEL);
3568         adapter->rss_lut = kzalloc(adapter->rss_lut_size, GFP_KERNEL);
3569         if (!adapter->rss_key || !adapter->rss_lut)
3570                 goto err_mem;
3571
3572         if (RSS_AQ(adapter)) {
3573                 adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_RSS;
3574                 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
3575         } else {
3576                 i40evf_init_rss(adapter);
3577         }
3578         return;
3579 restart:
3580         schedule_delayed_work(&adapter->init_task, msecs_to_jiffies(30));
3581         return;
3582 err_mem:
3583         i40evf_free_rss(adapter);
3584 err_register:
3585         i40evf_free_misc_irq(adapter);
3586 err_sw_init:
3587         i40evf_reset_interrupt_capability(adapter);
3588 err_alloc:
3589         kfree(adapter->vf_res);
3590         adapter->vf_res = NULL;
3591 err:
3592         /* Things went into the weeds, so try again later */
3593         if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
3594                 dev_err(&pdev->dev, "Failed to communicate with PF; waiting before retry\n");
3595                 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
3596                 i40evf_shutdown_adminq(hw);
3597                 adapter->state = __I40EVF_STARTUP;
3598                 schedule_delayed_work(&adapter->init_task, HZ * 5);
3599                 return;
3600         }
3601         schedule_delayed_work(&adapter->init_task, HZ);
3602 }
3603
3604 /**
3605  * i40evf_shutdown - Shutdown the device in preparation for a reboot
3606  * @pdev: pci device structure
3607  **/
3608 static void i40evf_shutdown(struct pci_dev *pdev)
3609 {
3610         struct net_device *netdev = pci_get_drvdata(pdev);
3611         struct i40evf_adapter *adapter = netdev_priv(netdev);
3612
3613         netif_device_detach(netdev);
3614
3615         if (netif_running(netdev))
3616                 i40evf_close(netdev);
3617
3618         /* Prevent the watchdog from running. */
3619         adapter->state = __I40EVF_REMOVE;
3620         adapter->aq_required = 0;
3621
3622 #ifdef CONFIG_PM
3623         pci_save_state(pdev);
3624
3625 #endif
3626         pci_disable_device(pdev);
3627 }
3628
3629 /**
3630  * i40evf_probe - Device Initialization Routine
3631  * @pdev: PCI device information struct
3632  * @ent: entry in i40evf_pci_tbl
3633  *
3634  * Returns 0 on success, negative on failure
3635  *
3636  * i40evf_probe initializes an adapter identified by a pci_dev structure.
3637  * The OS initialization, configuring of the adapter private structure,
3638  * and a hardware reset occur.
3639  **/
3640 static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3641 {
3642         struct net_device *netdev;
3643         struct i40evf_adapter *adapter = NULL;
3644         struct i40e_hw *hw = NULL;
3645         int err;
3646
3647         err = pci_enable_device(pdev);
3648         if (err)
3649                 return err;
3650
3651         err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
3652         if (err) {
3653                 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
3654                 if (err) {
3655                         dev_err(&pdev->dev,
3656                                 "DMA configuration failed: 0x%x\n", err);
3657                         goto err_dma;
3658                 }
3659         }
3660
3661         err = pci_request_regions(pdev, i40evf_driver_name);
3662         if (err) {
3663                 dev_err(&pdev->dev,
3664                         "pci_request_regions failed 0x%x\n", err);
3665                 goto err_pci_reg;
3666         }
3667
3668         pci_enable_pcie_error_reporting(pdev);
3669
3670         pci_set_master(pdev);
3671
3672         netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter),
3673                                    I40EVF_MAX_REQ_QUEUES);
3674         if (!netdev) {
3675                 err = -ENOMEM;
3676                 goto err_alloc_etherdev;
3677         }
3678
3679         SET_NETDEV_DEV(netdev, &pdev->dev);
3680
3681         pci_set_drvdata(pdev, netdev);
3682         adapter = netdev_priv(netdev);
3683
3684         adapter->netdev = netdev;
3685         adapter->pdev = pdev;
3686
3687         hw = &adapter->hw;
3688         hw->back = adapter;
3689
3690         adapter->msg_enable = BIT(DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
3691         adapter->state = __I40EVF_STARTUP;
3692
3693         /* Call save state here because it relies on the adapter struct. */
3694         pci_save_state(pdev);
3695
3696         hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
3697                               pci_resource_len(pdev, 0));
3698         if (!hw->hw_addr) {
3699                 err = -EIO;
3700                 goto err_ioremap;
3701         }
3702         hw->vendor_id = pdev->vendor;
3703         hw->device_id = pdev->device;
3704         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
3705         hw->subsystem_vendor_id = pdev->subsystem_vendor;
3706         hw->subsystem_device_id = pdev->subsystem_device;
3707         hw->bus.device = PCI_SLOT(pdev->devfn);
3708         hw->bus.func = PCI_FUNC(pdev->devfn);
3709         hw->bus.bus_id = pdev->bus->number;
3710
3711         /* set up the locks for the AQ, do this only once in probe
3712          * and destroy them only once in remove
3713          */
3714         mutex_init(&hw->aq.asq_mutex);
3715         mutex_init(&hw->aq.arq_mutex);
3716
3717         spin_lock_init(&adapter->mac_vlan_list_lock);
3718         spin_lock_init(&adapter->cloud_filter_list_lock);
3719
3720         INIT_LIST_HEAD(&adapter->mac_filter_list);
3721         INIT_LIST_HEAD(&adapter->vlan_filter_list);
3722         INIT_LIST_HEAD(&adapter->cloud_filter_list);
3723
3724         INIT_WORK(&adapter->reset_task, i40evf_reset_task);
3725         INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
3726         INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
3727         INIT_DELAYED_WORK(&adapter->client_task, i40evf_client_task);
3728         INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
3729         schedule_delayed_work(&adapter->init_task,
3730                               msecs_to_jiffies(5 * (pdev->devfn & 0x07)));
3731
3732         /* Setup the wait queue for indicating transition to down status */
3733         init_waitqueue_head(&adapter->down_waitqueue);
3734
3735         return 0;
3736
3737 err_ioremap:
3738         free_netdev(netdev);
3739 err_alloc_etherdev:
3740         pci_disable_pcie_error_reporting(pdev);
3741         pci_release_regions(pdev);
3742 err_pci_reg:
3743 err_dma:
3744         pci_disable_device(pdev);
3745         return err;
3746 }
3747
3748 #ifdef CONFIG_PM
3749 /**
3750  * i40evf_suspend - Power management suspend routine
3751  * @pdev: PCI device information struct
3752  * @state: unused
3753  *
3754  * Called when the system (VM) is entering sleep/suspend.
3755  **/
3756 static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
3757 {
3758         struct net_device *netdev = pci_get_drvdata(pdev);
3759         struct i40evf_adapter *adapter = netdev_priv(netdev);
3760         int retval = 0;
3761
3762         netif_device_detach(netdev);
3763
3764         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
3765                                 &adapter->crit_section))
3766                 usleep_range(500, 1000);
3767
3768         if (netif_running(netdev)) {
3769                 rtnl_lock();
3770                 i40evf_down(adapter);
3771                 rtnl_unlock();
3772         }
3773         i40evf_free_misc_irq(adapter);
3774         i40evf_reset_interrupt_capability(adapter);
3775
3776         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
3777
3778         retval = pci_save_state(pdev);
3779         if (retval)
3780                 return retval;
3781
3782         pci_disable_device(pdev);
3783
3784         return 0;
3785 }
3786
3787 /**
3788  * i40evf_resume - Power management resume routine
3789  * @pdev: PCI device information struct
3790  *
3791  * Called when the system (VM) is resumed from sleep/suspend.
3792  **/
3793 static int i40evf_resume(struct pci_dev *pdev)
3794 {
3795         struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
3796         struct net_device *netdev = adapter->netdev;
3797         u32 err;
3798
3799         pci_set_power_state(pdev, PCI_D0);
3800         pci_restore_state(pdev);
3801         /* pci_restore_state clears dev->state_saved so call
3802          * pci_save_state to restore it.
3803          */
3804         pci_save_state(pdev);
3805
3806         err = pci_enable_device_mem(pdev);
3807         if (err) {
3808                 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
3809                 return err;
3810         }
3811         pci_set_master(pdev);
3812
3813         rtnl_lock();
3814         err = i40evf_set_interrupt_capability(adapter);
3815         if (err) {
3816                 rtnl_unlock();
3817                 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
3818                 return err;
3819         }
3820         err = i40evf_request_misc_irq(adapter);
3821         rtnl_unlock();
3822         if (err) {
3823                 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
3824                 return err;
3825         }
3826
3827         schedule_work(&adapter->reset_task);
3828
3829         netif_device_attach(netdev);
3830
3831         return err;
3832 }
3833
3834 #endif /* CONFIG_PM */
3835 /**
3836  * i40evf_remove - Device Removal Routine
3837  * @pdev: PCI device information struct
3838  *
3839  * i40evf_remove is called by the PCI subsystem to alert the driver
3840  * that it should release a PCI device.  The could be caused by a
3841  * Hot-Plug event, or because the driver is going to be removed from
3842  * memory.
3843  **/
3844 static void i40evf_remove(struct pci_dev *pdev)
3845 {
3846         struct net_device *netdev = pci_get_drvdata(pdev);
3847         struct i40evf_adapter *adapter = netdev_priv(netdev);
3848         struct i40evf_vlan_filter *vlf, *vlftmp;
3849         struct i40evf_mac_filter *f, *ftmp;
3850         struct i40evf_cloud_filter *cf, *cftmp;
3851         struct i40e_hw *hw = &adapter->hw;
3852         int err;
3853         /* Indicate we are in remove and not to run reset_task */
3854         set_bit(__I40EVF_IN_REMOVE_TASK, &adapter->crit_section);
3855         cancel_delayed_work_sync(&adapter->init_task);
3856         cancel_work_sync(&adapter->reset_task);
3857         cancel_delayed_work_sync(&adapter->client_task);
3858         if (adapter->netdev_registered) {
3859                 unregister_netdev(netdev);
3860                 adapter->netdev_registered = false;
3861         }
3862         if (CLIENT_ALLOWED(adapter)) {
3863                 err = i40evf_lan_del_device(adapter);
3864                 if (err)
3865                         dev_warn(&pdev->dev, "Failed to delete client device: %d\n",
3866                                  err);
3867         }
3868
3869         /* Shut down all the garbage mashers on the detention level */
3870         adapter->state = __I40EVF_REMOVE;
3871         adapter->aq_required = 0;
3872         adapter->flags &= ~I40EVF_FLAG_REINIT_ITR_NEEDED;
3873         i40evf_request_reset(adapter);
3874         msleep(50);
3875         /* If the FW isn't responding, kick it once, but only once. */
3876         if (!i40evf_asq_done(hw)) {
3877                 i40evf_request_reset(adapter);
3878                 msleep(50);
3879         }
3880         i40evf_free_all_tx_resources(adapter);
3881         i40evf_free_all_rx_resources(adapter);
3882         i40evf_misc_irq_disable(adapter);
3883         i40evf_free_misc_irq(adapter);
3884         i40evf_reset_interrupt_capability(adapter);
3885         i40evf_free_q_vectors(adapter);
3886
3887         if (adapter->watchdog_timer.function)
3888                 del_timer_sync(&adapter->watchdog_timer);
3889
3890         cancel_work_sync(&adapter->adminq_task);
3891
3892         i40evf_free_rss(adapter);
3893
3894         if (hw->aq.asq.count)
3895                 i40evf_shutdown_adminq(hw);
3896
3897         /* destroy the locks only once, here */
3898         mutex_destroy(&hw->aq.arq_mutex);
3899         mutex_destroy(&hw->aq.asq_mutex);
3900
3901         iounmap(hw->hw_addr);
3902         pci_release_regions(pdev);
3903         i40evf_free_all_tx_resources(adapter);
3904         i40evf_free_all_rx_resources(adapter);
3905         i40evf_free_queues(adapter);
3906         kfree(adapter->vf_res);
3907         spin_lock_bh(&adapter->mac_vlan_list_lock);
3908         /* If we got removed before an up/down sequence, we've got a filter
3909          * hanging out there that we need to get rid of.
3910          */
3911         list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
3912                 list_del(&f->list);
3913                 kfree(f);
3914         }
3915         list_for_each_entry_safe(vlf, vlftmp, &adapter->vlan_filter_list,
3916                                  list) {
3917                 list_del(&vlf->list);
3918                 kfree(vlf);
3919         }
3920
3921         spin_unlock_bh(&adapter->mac_vlan_list_lock);
3922
3923         spin_lock_bh(&adapter->cloud_filter_list_lock);
3924         list_for_each_entry_safe(cf, cftmp, &adapter->cloud_filter_list, list) {
3925                 list_del(&cf->list);
3926                 kfree(cf);
3927         }
3928         spin_unlock_bh(&adapter->cloud_filter_list_lock);
3929
3930         free_netdev(netdev);
3931
3932         pci_disable_pcie_error_reporting(pdev);
3933
3934         pci_disable_device(pdev);
3935 }
3936
3937 static struct pci_driver i40evf_driver = {
3938         .name     = i40evf_driver_name,
3939         .id_table = i40evf_pci_tbl,
3940         .probe    = i40evf_probe,
3941         .remove   = i40evf_remove,
3942 #ifdef CONFIG_PM
3943         .suspend  = i40evf_suspend,
3944         .resume   = i40evf_resume,
3945 #endif
3946         .shutdown = i40evf_shutdown,
3947 };
3948
3949 /**
3950  * i40e_init_module - Driver Registration Routine
3951  *
3952  * i40e_init_module is the first routine called when the driver is
3953  * loaded. All it does is register with the PCI subsystem.
3954  **/
3955 static int __init i40evf_init_module(void)
3956 {
3957         int ret;
3958
3959         pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
3960                 i40evf_driver_version);
3961
3962         pr_info("%s\n", i40evf_copyright);
3963
3964         i40evf_wq = alloc_workqueue("%s", WQ_UNBOUND | WQ_MEM_RECLAIM, 1,
3965                                     i40evf_driver_name);
3966         if (!i40evf_wq) {
3967                 pr_err("%s: Failed to create workqueue\n", i40evf_driver_name);
3968                 return -ENOMEM;
3969         }
3970         ret = pci_register_driver(&i40evf_driver);
3971         return ret;
3972 }
3973
3974 module_init(i40evf_init_module);
3975
3976 /**
3977  * i40e_exit_module - Driver Exit Cleanup Routine
3978  *
3979  * i40e_exit_module is called just before the driver is removed
3980  * from memory.
3981  **/
3982 static void __exit i40evf_exit_module(void)
3983 {
3984         pci_unregister_driver(&i40evf_driver);
3985         destroy_workqueue(i40evf_wq);
3986 }
3987
3988 module_exit(i40evf_exit_module);
3989
3990 /* i40evf_main.c */