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

   1 /*******************************************************************************
   2  *
   3  * Intel Ethernet Controller XL710 Family Linux Virtual Function Driver
   4  * Copyright(c) 2013 - 2015 Intel Corporation.
   5  *
   6  * This program is free software; you can redistribute it and/or modify it
   7  * under the terms and conditions of the GNU General Public License,
   8  * version 2, as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope it will be useful, but WITHOUT
  11  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
  13  * more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program.  If not, see <http://www.gnu.org/licenses/>.
  17  *
  18  * The full GNU General Public License is included in this distribution in
  19  * the file called "COPYING".
  20  *
  21  * Contact Information:
  22  * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  23  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  24  *
  25  ******************************************************************************/
  26
  27 #include "i40evf.h"
  28 #include "i40e_prototype.h"
  29 static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter);
  30 static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter);
  31 static int i40evf_close(struct net_device *netdev);
  32
  33 char i40evf_driver_name[] = "i40evf";
  34 static const char i40evf_driver_string[] =
  35         "Intel(R) XL710/X710 Virtual Function Network Driver";
  36
  37 #define DRV_KERN "-k"
  38
  39 #define DRV_VERSION_MAJOR 1
  40 #define DRV_VERSION_MINOR 4
  41 #define DRV_VERSION_BUILD 4
  42 #define DRV_VERSION __stringify(DRV_VERSION_MAJOR) "." \
  43              __stringify(DRV_VERSION_MINOR) "." \
  44              __stringify(DRV_VERSION_BUILD) \
  45              DRV_KERN
  46 const char i40evf_driver_version[] = DRV_VERSION;
  47 static const char i40evf_copyright[] =
  48         "Copyright (c) 2013 - 2015 Intel Corporation.";
  49
  50 /* i40evf_pci_tbl - PCI Device ID Table
  51  *
  52  * Wildcard entries (PCI_ANY_ID) should come last
  53  * Last entry must be all 0s
  54  *
  55  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  56  *   Class, Class Mask, private data (not used) }
  57  */
  58 static const struct pci_device_id i40evf_pci_tbl[] = {
  59         {PCI_VDEVICE(INTEL, I40E_DEV_ID_VF), 0},
  60         {PCI_VDEVICE(INTEL, I40E_DEV_ID_X722_VF), 0},
  61         /* required last entry */
  62         {0, }
  63 };
  64
  65 MODULE_DEVICE_TABLE(pci, i40evf_pci_tbl);
  66
  67 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
  68 MODULE_DESCRIPTION("Intel(R) XL710 X710 Virtual Function Network Driver");
  69 MODULE_LICENSE("GPL");
  70 MODULE_VERSION(DRV_VERSION);
  71
  72 static struct workqueue_struct *i40evf_wq;
  73
  74 /**
  75  * i40evf_allocate_dma_mem_d - OS specific memory alloc for shared code
  76  * @hw:   pointer to the HW structure
  77  * @mem:  ptr to mem struct to fill out
  78  * @size: size of memory requested
  79  * @alignment: what to align the allocation to
  80  **/
  81 i40e_status i40evf_allocate_dma_mem_d(struct i40e_hw *hw,
  82                                       struct i40e_dma_mem *mem,
  83                                       u64 size, u32 alignment)
  84 {
  85         struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
  86
  87         if (!mem)
  88                 return I40E_ERR_PARAM;
  89
  90         mem->size = ALIGN(size, alignment);
  91         mem->va = dma_alloc_coherent(&adapter->pdev->dev, mem->size,
  92                                      (dma_addr_t *)&mem->pa, GFP_KERNEL);
  93         if (mem->va)
  94                 return 0;
  95         else
  96                 return I40E_ERR_NO_MEMORY;
  97 }
  98
  99 /**
 100  * i40evf_free_dma_mem_d - OS specific memory free for shared code
 101  * @hw:   pointer to the HW structure
 102  * @mem:  ptr to mem struct to free
 103  **/
 104 i40e_status i40evf_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem)
 105 {
 106         struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
 107
 108         if (!mem || !mem->va)
 109                 return I40E_ERR_PARAM;
 110         dma_free_coherent(&adapter->pdev->dev, mem->size,
 111                           mem->va, (dma_addr_t)mem->pa);
 112         return 0;
 113 }
 114
 115 /**
 116  * i40evf_allocate_virt_mem_d - OS specific memory alloc for shared code
 117  * @hw:   pointer to the HW structure
 118  * @mem:  ptr to mem struct to fill out
 119  * @size: size of memory requested
 120  **/
 121 i40e_status i40evf_allocate_virt_mem_d(struct i40e_hw *hw,
 122                                        struct i40e_virt_mem *mem, u32 size)
 123 {
 124         if (!mem)
 125                 return I40E_ERR_PARAM;
 126
 127         mem->size = size;
 128         mem->va = kzalloc(size, GFP_KERNEL);
 129
 130         if (mem->va)
 131                 return 0;
 132         else
 133                 return I40E_ERR_NO_MEMORY;
 134 }
 135
 136 /**
 137  * i40evf_free_virt_mem_d - OS specific memory free for shared code
 138  * @hw:   pointer to the HW structure
 139  * @mem:  ptr to mem struct to free
 140  **/
 141 i40e_status i40evf_free_virt_mem_d(struct i40e_hw *hw,
 142                                    struct i40e_virt_mem *mem)
 143 {
 144         if (!mem)
 145                 return I40E_ERR_PARAM;
 146
 147         /* it's ok to kfree a NULL pointer */
 148         kfree(mem->va);
 149
 150         return 0;
 151 }
 152
 153 /**
 154  * i40evf_debug_d - OS dependent version of debug printing
 155  * @hw:  pointer to the HW structure
 156  * @mask: debug level mask
 157  * @fmt_str: printf-type format description
 158  **/
 159 void i40evf_debug_d(void *hw, u32 mask, char *fmt_str, ...)
 160 {
 161         char buf[512];
 162         va_list argptr;
 163
 164         if (!(mask & ((struct i40e_hw *)hw)->debug_mask))
 165                 return;
 166
 167         va_start(argptr, fmt_str);
 168         vsnprintf(buf, sizeof(buf), fmt_str, argptr);
 169         va_end(argptr);
 170
 171         /* the debug string is already formatted with a newline */
 172         pr_info("%s", buf);
 173 }
 174
 175 /**
 176  * i40evf_tx_timeout - Respond to a Tx Hang
 177  * @netdev: network interface device structure
 178  **/
 179 static void i40evf_tx_timeout(struct net_device *netdev)
 180 {
 181         struct i40evf_adapter *adapter = netdev_priv(netdev);
 182
 183         adapter->tx_timeout_count++;
 184         if (!(adapter->flags & (I40EVF_FLAG_RESET_PENDING |
 185                                 I40EVF_FLAG_RESET_NEEDED))) {
 186                 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
 187                 queue_work(i40evf_wq, &adapter->reset_task);
 188         }
 189 }
 190
 191 /**
 192  * i40evf_misc_irq_disable - Mask off interrupt generation on the NIC
 193  * @adapter: board private structure
 194  **/
 195 static void i40evf_misc_irq_disable(struct i40evf_adapter *adapter)
 196 {
 197         struct i40e_hw *hw = &adapter->hw;
 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                              I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK);
 259                 }
 260         }
 261 }
 262
 263 /**
 264  * i40evf_fire_sw_int - Generate SW interrupt for specified vectors
 265  * @adapter: board private structure
 266  * @mask: bitmap of vectors to trigger
 267  **/
 268 static void i40evf_fire_sw_int(struct i40evf_adapter *adapter, u32 mask)
 269 {
 270         struct i40e_hw *hw = &adapter->hw;
 271         int i;
 272         u32 dyn_ctl;
 273
 274         if (mask & 1) {
 275                 dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTL01);
 276                 dyn_ctl |= I40E_VFINT_DYN_CTLN1_SWINT_TRIG_MASK |
 277                            I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
 278                            I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK;
 279                 wr32(hw, I40E_VFINT_DYN_CTL01, dyn_ctl);
 280         }
 281         for (i = 1; i < adapter->num_msix_vectors; i++) {
 282                 if (mask & BIT(i)) {
 283                         dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTLN1(i - 1));
 284                         dyn_ctl |= I40E_VFINT_DYN_CTLN1_SWINT_TRIG_MASK |
 285                                    I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
 286                                    I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK;
 287                         wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), dyn_ctl);
 288                 }
 289         }
 290 }
 291
 292 /**
 293  * i40evf_irq_enable - Enable default interrupt generation settings
 294  * @adapter: board private structure
 295  * @flush: boolean value whether to run rd32()
 296  **/
 297 void i40evf_irq_enable(struct i40evf_adapter *adapter, bool flush)
 298 {
 299         struct i40e_hw *hw = &adapter->hw;
 300
 301         i40evf_misc_irq_enable(adapter);
 302         i40evf_irq_enable_queues(adapter, ~0);
 303
 304         if (flush)
 305                 rd32(hw, I40E_VFGEN_RSTAT);
 306 }
 307
 308 /**
 309  * i40evf_msix_aq - Interrupt handler for vector 0
 310  * @irq: interrupt number
 311  * @data: pointer to netdev
 312  **/
 313 static irqreturn_t i40evf_msix_aq(int irq, void *data)
 314 {
 315         struct net_device *netdev = data;
 316         struct i40evf_adapter *adapter = netdev_priv(netdev);
 317         struct i40e_hw *hw = &adapter->hw;
 318         u32 val;
 319
 320         /* handle non-queue interrupts, these reads clear the registers */
 321         val = rd32(hw, I40E_VFINT_ICR01);
 322         val = rd32(hw, I40E_VFINT_ICR0_ENA1);
 323
 324         val = rd32(hw, I40E_VFINT_DYN_CTL01) |
 325               I40E_VFINT_DYN_CTL01_CLEARPBA_MASK;
 326         wr32(hw, I40E_VFINT_DYN_CTL01, val);
 327
 328         /* schedule work on the private workqueue */
 329         schedule_work(&adapter->adminq_task);
 330
 331         return IRQ_HANDLED;
 332 }
 333
 334 /**
 335  * i40evf_msix_clean_rings - MSIX mode Interrupt Handler
 336  * @irq: interrupt number
 337  * @data: pointer to a q_vector
 338  **/
 339 static irqreturn_t i40evf_msix_clean_rings(int irq, void *data)
 340 {
 341         struct i40e_q_vector *q_vector = data;
 342
 343         if (!q_vector->tx.ring && !q_vector->rx.ring)
 344                 return IRQ_HANDLED;
 345
 346         napi_schedule_irqoff(&q_vector->napi);
 347
 348         return IRQ_HANDLED;
 349 }
 350
 351 /**
 352  * i40evf_map_vector_to_rxq - associate irqs with rx queues
 353  * @adapter: board private structure
 354  * @v_idx: interrupt number
 355  * @r_idx: queue number
 356  **/
 357 static void
 358 i40evf_map_vector_to_rxq(struct i40evf_adapter *adapter, int v_idx, int r_idx)
 359 {
 360         struct i40e_q_vector *q_vector = &adapter->q_vectors[v_idx];
 361         struct i40e_ring *rx_ring = &adapter->rx_rings[r_idx];
 362
 363         rx_ring->q_vector = q_vector;
 364         rx_ring->next = q_vector->rx.ring;
 365         rx_ring->vsi = &adapter->vsi;
 366         q_vector->rx.ring = rx_ring;
 367         q_vector->rx.count++;
 368         q_vector->rx.latency_range = I40E_LOW_LATENCY;
 369         q_vector->itr_countdown = ITR_COUNTDOWN_START;
 370 }
 371
 372 /**
 373  * i40evf_map_vector_to_txq - associate irqs with tx queues
 374  * @adapter: board private structure
 375  * @v_idx: interrupt number
 376  * @t_idx: queue number
 377  **/
 378 static void
 379 i40evf_map_vector_to_txq(struct i40evf_adapter *adapter, int v_idx, int t_idx)
 380 {
 381         struct i40e_q_vector *q_vector = &adapter->q_vectors[v_idx];
 382         struct i40e_ring *tx_ring = &adapter->tx_rings[t_idx];
 383
 384         tx_ring->q_vector = q_vector;
 385         tx_ring->next = q_vector->tx.ring;
 386         tx_ring->vsi = &adapter->vsi;
 387         q_vector->tx.ring = tx_ring;
 388         q_vector->tx.count++;
 389         q_vector->tx.latency_range = I40E_LOW_LATENCY;
 390         q_vector->itr_countdown = ITR_COUNTDOWN_START;
 391         q_vector->num_ringpairs++;
 392         q_vector->ring_mask |= BIT(t_idx);
 393 }
 394
 395 /**
 396  * i40evf_map_rings_to_vectors - Maps descriptor rings to vectors
 397  * @adapter: board private structure to initialize
 398  *
 399  * This function maps descriptor rings to the queue-specific vectors
 400  * we were allotted through the MSI-X enabling code.  Ideally, we'd have
 401  * one vector per ring/queue, but on a constrained vector budget, we
 402  * group the rings as "efficiently" as possible.  You would add new
 403  * mapping configurations in here.
 404  **/
 405 static int i40evf_map_rings_to_vectors(struct i40evf_adapter *adapter)
 406 {
 407         int q_vectors;
 408         int v_start = 0;
 409         int rxr_idx = 0, txr_idx = 0;
 410         int rxr_remaining = adapter->num_active_queues;
 411         int txr_remaining = adapter->num_active_queues;
 412         int i, j;
 413         int rqpv, tqpv;
 414         int err = 0;
 415
 416         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 417
 418         /* The ideal configuration...
 419          * We have enough vectors to map one per queue.
 420          */
 421         if (q_vectors >= (rxr_remaining * 2)) {
 422                 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
 423                         i40evf_map_vector_to_rxq(adapter, v_start, rxr_idx);
 424
 425                 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
 426                         i40evf_map_vector_to_txq(adapter, v_start, txr_idx);
 427                 goto out;
 428         }
 429
 430         /* If we don't have enough vectors for a 1-to-1
 431          * mapping, we'll have to group them so there are
 432          * multiple queues per vector.
 433          * Re-adjusting *qpv takes care of the remainder.
 434          */
 435         for (i = v_start; i < q_vectors; i++) {
 436                 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
 437                 for (j = 0; j < rqpv; j++) {
 438                         i40evf_map_vector_to_rxq(adapter, i, rxr_idx);
 439                         rxr_idx++;
 440                         rxr_remaining--;
 441                 }
 442         }
 443         for (i = v_start; i < q_vectors; i++) {
 444                 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
 445                 for (j = 0; j < tqpv; j++) {
 446                         i40evf_map_vector_to_txq(adapter, i, txr_idx);
 447                         txr_idx++;
 448                         txr_remaining--;
 449                 }
 450         }
 451
 452 out:
 453         adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
 454
 455         return err;
 456 }
 457
 458 #ifdef CONFIG_NET_POLL_CONTROLLER
 459 /**
 460  * i40evf_netpoll - A Polling 'interrupt' handler
 461  * @netdev: network interface device structure
 462  *
 463  * This is used by netconsole to send skbs without having to re-enable
 464  * interrupts.  It's not called while the normal interrupt routine is executing.
 465  **/
 466 static void i40evf_netpoll(struct net_device *netdev)
 467 {
 468         struct i40evf_adapter *adapter = netdev_priv(netdev);
 469         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 470         int i;
 471
 472         /* if interface is down do nothing */
 473         if (test_bit(__I40E_DOWN, &adapter->vsi.state))
 474                 return;
 475
 476         for (i = 0; i < q_vectors; i++)
 477                 i40evf_msix_clean_rings(0, &adapter->q_vectors[i]);
 478 }
 479
 480 #endif
 481 /**
 482  * i40evf_request_traffic_irqs - Initialize MSI-X interrupts
 483  * @adapter: board private structure
 484  *
 485  * Allocates MSI-X vectors for tx and rx handling, and requests
 486  * interrupts from the kernel.
 487  **/
 488 static int
 489 i40evf_request_traffic_irqs(struct i40evf_adapter *adapter, char *basename)
 490 {
 491         int vector, err, q_vectors;
 492         int rx_int_idx = 0, tx_int_idx = 0;
 493
 494         i40evf_irq_disable(adapter);
 495         /* Decrement for Other and TCP Timer vectors */
 496         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 497
 498         for (vector = 0; vector < q_vectors; vector++) {
 499                 struct i40e_q_vector *q_vector = &adapter->q_vectors[vector];
 500
 501                 if (q_vector->tx.ring && q_vector->rx.ring) {
 502                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 503                                  "i40evf-%s-%s-%d", basename,
 504                                  "TxRx", rx_int_idx++);
 505                         tx_int_idx++;
 506                 } else if (q_vector->rx.ring) {
 507                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 508                                  "i40evf-%s-%s-%d", basename,
 509                                  "rx", rx_int_idx++);
 510                 } else if (q_vector->tx.ring) {
 511                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 512                                  "i40evf-%s-%s-%d", basename,
 513                                  "tx", tx_int_idx++);
 514                 } else {
 515                         /* skip this unused q_vector */
 516                         continue;
 517                 }
 518                 err = request_irq(
 519                         adapter->msix_entries[vector + NONQ_VECS].vector,
 520                         i40evf_msix_clean_rings,
 521                         0,
 522                         q_vector->name,
 523                         q_vector);
 524                 if (err) {
 525                         dev_info(&adapter->pdev->dev,
 526                                  "Request_irq failed, error: %d\n", err);
 527                         goto free_queue_irqs;
 528                 }
 529                 /* assign the mask for this irq */
 530                 irq_set_affinity_hint(
 531                         adapter->msix_entries[vector + NONQ_VECS].vector,
 532                         q_vector->affinity_mask);
 533         }
 534
 535         return 0;
 536
 537 free_queue_irqs:
 538         while (vector) {
 539                 vector--;
 540                 irq_set_affinity_hint(
 541                         adapter->msix_entries[vector + NONQ_VECS].vector,
 542                         NULL);
 543                 free_irq(adapter->msix_entries[vector + NONQ_VECS].vector,
 544                          &adapter->q_vectors[vector]);
 545         }
 546         return err;
 547 }
 548
 549 /**
 550  * i40evf_request_misc_irq - Initialize MSI-X interrupts
 551  * @adapter: board private structure
 552  *
 553  * Allocates MSI-X vector 0 and requests interrupts from the kernel. This
 554  * vector is only for the admin queue, and stays active even when the netdev
 555  * is closed.
 556  **/
 557 static int i40evf_request_misc_irq(struct i40evf_adapter *adapter)
 558 {
 559         struct net_device *netdev = adapter->netdev;
 560         int err;
 561
 562         snprintf(adapter->misc_vector_name,
 563                  sizeof(adapter->misc_vector_name) - 1, "i40evf-%s:mbx",
 564                  dev_name(&adapter->pdev->dev));
 565         err = request_irq(adapter->msix_entries[0].vector,
 566                           &i40evf_msix_aq, 0,
 567                           adapter->misc_vector_name, netdev);
 568         if (err) {
 569                 dev_err(&adapter->pdev->dev,
 570                         "request_irq for %s failed: %d\n",
 571                         adapter->misc_vector_name, err);
 572                 free_irq(adapter->msix_entries[0].vector, netdev);
 573         }
 574         return err;
 575 }
 576
 577 /**
 578  * i40evf_free_traffic_irqs - Free MSI-X interrupts
 579  * @adapter: board private structure
 580  *
 581  * Frees all MSI-X vectors other than 0.
 582  **/
 583 static void i40evf_free_traffic_irqs(struct i40evf_adapter *adapter)
 584 {
 585         int i;
 586         int q_vectors;
 587
 588         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 589
 590         for (i = 0; i < q_vectors; i++) {
 591                 irq_set_affinity_hint(adapter->msix_entries[i+1].vector,
 592                                       NULL);
 593                 free_irq(adapter->msix_entries[i+1].vector,
 594                          &adapter->q_vectors[i]);
 595         }
 596 }
 597
 598 /**
 599  * i40evf_free_misc_irq - Free MSI-X miscellaneous vector
 600  * @adapter: board private structure
 601  *
 602  * Frees MSI-X vector 0.
 603  **/
 604 static void i40evf_free_misc_irq(struct i40evf_adapter *adapter)
 605 {
 606         struct net_device *netdev = adapter->netdev;
 607
 608         free_irq(adapter->msix_entries[0].vector, netdev);
 609 }
 610
 611 /**
 612  * i40evf_configure_tx - Configure Transmit Unit after Reset
 613  * @adapter: board private structure
 614  *
 615  * Configure the Tx unit of the MAC after a reset.
 616  **/
 617 static void i40evf_configure_tx(struct i40evf_adapter *adapter)
 618 {
 619         struct i40e_hw *hw = &adapter->hw;
 620         int i;
 621
 622         for (i = 0; i < adapter->num_active_queues; i++)
 623                 adapter->tx_rings[i].tail = hw->hw_addr + I40E_QTX_TAIL1(i);
 624 }
 625
 626 /**
 627  * i40evf_configure_rx - Configure Receive Unit after Reset
 628  * @adapter: board private structure
 629  *
 630  * Configure the Rx unit of the MAC after a reset.
 631  **/
 632 static void i40evf_configure_rx(struct i40evf_adapter *adapter)
 633 {
 634         struct i40e_hw *hw = &adapter->hw;
 635         struct net_device *netdev = adapter->netdev;
 636         int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
 637         int i;
 638         int rx_buf_len;
 639
 640
 641         adapter->flags &= ~I40EVF_FLAG_RX_PS_CAPABLE;
 642         adapter->flags |= I40EVF_FLAG_RX_1BUF_CAPABLE;
 643
 644         /* Decide whether to use packet split mode or not */
 645         if (netdev->mtu > ETH_DATA_LEN) {
 646                 if (adapter->flags & I40EVF_FLAG_RX_PS_CAPABLE)
 647                         adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
 648                 else
 649                         adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
 650         } else {
 651                 if (adapter->flags & I40EVF_FLAG_RX_1BUF_CAPABLE)
 652                         adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
 653                 else
 654                         adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
 655         }
 656
 657         /* Set the RX buffer length according to the mode */
 658         if (adapter->flags & I40EVF_FLAG_RX_PS_ENABLED) {
 659                 rx_buf_len = I40E_RX_HDR_SIZE;
 660         } else {
 661                 if (netdev->mtu <= ETH_DATA_LEN)
 662                         rx_buf_len = I40EVF_RXBUFFER_2048;
 663                 else
 664                         rx_buf_len = ALIGN(max_frame, 1024);
 665         }
 666
 667         for (i = 0; i < adapter->num_active_queues; i++) {
 668                 adapter->rx_rings[i].tail = hw->hw_addr + I40E_QRX_TAIL1(i);
 669                 adapter->rx_rings[i].rx_buf_len = rx_buf_len;
 670         }
 671 }
 672
 673 /**
 674  * i40evf_find_vlan - Search filter list for specific vlan filter
 675  * @adapter: board private structure
 676  * @vlan: vlan tag
 677  *
 678  * Returns ptr to the filter object or NULL
 679  **/
 680 static struct
 681 i40evf_vlan_filter *i40evf_find_vlan(struct i40evf_adapter *adapter, u16 vlan)
 682 {
 683         struct i40evf_vlan_filter *f;
 684
 685         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
 686                 if (vlan == f->vlan)
 687                         return f;
 688         }
 689         return NULL;
 690 }
 691
 692 /**
 693  * i40evf_add_vlan - Add a vlan filter to the list
 694  * @adapter: board private structure
 695  * @vlan: VLAN tag
 696  *
 697  * Returns ptr to the filter object or NULL when no memory available.
 698  **/
 699 static struct
 700 i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan)
 701 {
 702         struct i40evf_vlan_filter *f = NULL;
 703         int count = 50;
 704
 705         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 706                                 &adapter->crit_section)) {
 707                 udelay(1);
 708                 if (--count == 0)
 709                         goto out;
 710         }
 711
 712         f = i40evf_find_vlan(adapter, vlan);
 713         if (!f) {
 714                 f = kzalloc(sizeof(*f), GFP_ATOMIC);
 715                 if (!f)
 716                         goto clearout;
 717
 718                 f->vlan = vlan;
 719
 720                 INIT_LIST_HEAD(&f->list);
 721                 list_add(&f->list, &adapter->vlan_filter_list);
 722                 f->add = true;
 723                 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
 724         }
 725
 726 clearout:
 727         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 728 out:
 729         return f;
 730 }
 731
 732 /**
 733  * i40evf_del_vlan - Remove a vlan filter from the list
 734  * @adapter: board private structure
 735  * @vlan: VLAN tag
 736  **/
 737 static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan)
 738 {
 739         struct i40evf_vlan_filter *f;
 740         int count = 50;
 741
 742         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 743                                 &adapter->crit_section)) {
 744                 udelay(1);
 745                 if (--count == 0)
 746                         return;
 747         }
 748
 749         f = i40evf_find_vlan(adapter, vlan);
 750         if (f) {
 751                 f->remove = true;
 752                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
 753         }
 754         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 755 }
 756
 757 /**
 758  * i40evf_vlan_rx_add_vid - Add a VLAN filter to a device
 759  * @netdev: network device struct
 760  * @vid: VLAN tag
 761  **/
 762 static int i40evf_vlan_rx_add_vid(struct net_device *netdev,
 763                                   __always_unused __be16 proto, u16 vid)
 764 {
 765         struct i40evf_adapter *adapter = netdev_priv(netdev);
 766
 767         if (!VLAN_ALLOWED(adapter))
 768                 return -EIO;
 769         if (i40evf_add_vlan(adapter, vid) == NULL)
 770                 return -ENOMEM;
 771         return 0;
 772 }
 773
 774 /**
 775  * i40evf_vlan_rx_kill_vid - Remove a VLAN filter from a device
 776  * @netdev: network device struct
 777  * @vid: VLAN tag
 778  **/
 779 static int i40evf_vlan_rx_kill_vid(struct net_device *netdev,
 780                                    __always_unused __be16 proto, u16 vid)
 781 {
 782         struct i40evf_adapter *adapter = netdev_priv(netdev);
 783
 784         if (VLAN_ALLOWED(adapter)) {
 785                 i40evf_del_vlan(adapter, vid);
 786                 return 0;
 787         }
 788         return -EIO;
 789 }
 790
 791 /**
 792  * i40evf_find_filter - Search filter list for specific mac filter
 793  * @adapter: board private structure
 794  * @macaddr: the MAC address
 795  *
 796  * Returns ptr to the filter object or NULL
 797  **/
 798 static struct
 799 i40evf_mac_filter *i40evf_find_filter(struct i40evf_adapter *adapter,
 800                                       u8 *macaddr)
 801 {
 802         struct i40evf_mac_filter *f;
 803
 804         if (!macaddr)
 805                 return NULL;
 806
 807         list_for_each_entry(f, &adapter->mac_filter_list, list) {
 808                 if (ether_addr_equal(macaddr, f->macaddr))
 809                         return f;
 810         }
 811         return NULL;
 812 }
 813
 814 /**
 815  * i40e_add_filter - Add a mac filter to the filter list
 816  * @adapter: board private structure
 817  * @macaddr: the MAC address
 818  *
 819  * Returns ptr to the filter object or NULL when no memory available.
 820  **/
 821 static struct
 822 i40evf_mac_filter *i40evf_add_filter(struct i40evf_adapter *adapter,
 823                                      u8 *macaddr)
 824 {
 825         struct i40evf_mac_filter *f;
 826         int count = 50;
 827
 828         if (!macaddr)
 829                 return NULL;
 830
 831         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 832                                 &adapter->crit_section)) {
 833                 udelay(1);
 834                 if (--count == 0)
 835                         return NULL;
 836         }
 837
 838         f = i40evf_find_filter(adapter, macaddr);
 839         if (!f) {
 840                 f = kzalloc(sizeof(*f), GFP_ATOMIC);
 841                 if (!f) {
 842                         clear_bit(__I40EVF_IN_CRITICAL_TASK,
 843                                   &adapter->crit_section);
 844                         return NULL;
 845                 }
 846
 847                 ether_addr_copy(f->macaddr, macaddr);
 848
 849                 list_add(&f->list, &adapter->mac_filter_list);
 850                 f->add = true;
 851                 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
 852         }
 853
 854         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 855         return f;
 856 }
 857
 858 /**
 859  * i40evf_set_mac - NDO callback to set port mac address
 860  * @netdev: network interface device structure
 861  * @p: pointer to an address structure
 862  *
 863  * Returns 0 on success, negative on failure
 864  **/
 865 static int i40evf_set_mac(struct net_device *netdev, void *p)
 866 {
 867         struct i40evf_adapter *adapter = netdev_priv(netdev);
 868         struct i40e_hw *hw = &adapter->hw;
 869         struct i40evf_mac_filter *f;
 870         struct sockaddr *addr = p;
 871
 872         if (!is_valid_ether_addr(addr->sa_data))
 873                 return -EADDRNOTAVAIL;
 874
 875         if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
 876                 return 0;
 877
 878         if (adapter->flags & I40EVF_FLAG_ADDR_SET_BY_PF)
 879                 return -EPERM;
 880
 881         f = i40evf_find_filter(adapter, hw->mac.addr);
 882         if (f) {
 883                 f->remove = true;
 884                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
 885         }
 886
 887         f = i40evf_add_filter(adapter, addr->sa_data);
 888         if (f) {
 889                 ether_addr_copy(hw->mac.addr, addr->sa_data);
 890                 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
 891         }
 892
 893         return (f == NULL) ? -ENOMEM : 0;
 894 }
 895
 896 /**
 897  * i40evf_set_rx_mode - NDO callback to set the netdev filters
 898  * @netdev: network interface device structure
 899  **/
 900 static void i40evf_set_rx_mode(struct net_device *netdev)
 901 {
 902         struct i40evf_adapter *adapter = netdev_priv(netdev);
 903         struct i40evf_mac_filter *f, *ftmp;
 904         struct netdev_hw_addr *uca;
 905         struct netdev_hw_addr *mca;
 906         struct netdev_hw_addr *ha;
 907         int count = 50;
 908
 909         /* add addr if not already in the filter list */
 910         netdev_for_each_uc_addr(uca, netdev) {
 911                 i40evf_add_filter(adapter, uca->addr);
 912         }
 913         netdev_for_each_mc_addr(mca, netdev) {
 914                 i40evf_add_filter(adapter, mca->addr);
 915         }
 916
 917         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 918                                 &adapter->crit_section)) {
 919                 udelay(1);
 920                 if (--count == 0) {
 921                         dev_err(&adapter->pdev->dev,
 922                                 "Failed to get lock in %s\n", __func__);
 923                         return;
 924                 }
 925         }
 926         /* remove filter if not in netdev list */
 927         list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
 928                 netdev_for_each_mc_addr(mca, netdev)
 929                         if (ether_addr_equal(mca->addr, f->macaddr))
 930                                 goto bottom_of_search_loop;
 931
 932                 netdev_for_each_uc_addr(uca, netdev)
 933                         if (ether_addr_equal(uca->addr, f->macaddr))
 934                                 goto bottom_of_search_loop;
 935
 936                 for_each_dev_addr(netdev, ha)
 937                         if (ether_addr_equal(ha->addr, f->macaddr))
 938                                 goto bottom_of_search_loop;
 939
 940                 if (ether_addr_equal(f->macaddr, adapter->hw.mac.addr))
 941                         goto bottom_of_search_loop;
 942
 943                 /* f->macaddr wasn't found in uc, mc, or ha list so delete it */
 944                 f->remove = true;
 945                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
 946
 947 bottom_of_search_loop:
 948                 continue;
 949         }
 950         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 951 }
 952
 953 /**
 954  * i40evf_napi_enable_all - enable NAPI on all queue vectors
 955  * @adapter: board private structure
 956  **/
 957 static void i40evf_napi_enable_all(struct i40evf_adapter *adapter)
 958 {
 959         int q_idx;
 960         struct i40e_q_vector *q_vector;
 961         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 962
 963         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
 964                 struct napi_struct *napi;
 965
 966                 q_vector = &adapter->q_vectors[q_idx];
 967                 napi = &q_vector->napi;
 968                 napi_enable(napi);
 969         }
 970 }
 971
 972 /**
 973  * i40evf_napi_disable_all - disable NAPI on all queue vectors
 974  * @adapter: board private structure
 975  **/
 976 static void i40evf_napi_disable_all(struct i40evf_adapter *adapter)
 977 {
 978         int q_idx;
 979         struct i40e_q_vector *q_vector;
 980         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 981
 982         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
 983                 q_vector = &adapter->q_vectors[q_idx];
 984                 napi_disable(&q_vector->napi);
 985         }
 986 }
 987
 988 /**
 989  * i40evf_configure - set up transmit and receive data structures
 990  * @adapter: board private structure
 991  **/
 992 static void i40evf_configure(struct i40evf_adapter *adapter)
 993 {
 994         struct net_device *netdev = adapter->netdev;
 995         int i;
 996
 997         i40evf_set_rx_mode(netdev);
 998
 999         i40evf_configure_tx(adapter);
1000         i40evf_configure_rx(adapter);
1001         adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
1002
1003         for (i = 0; i < adapter->num_active_queues; i++) {
1004                 struct i40e_ring *ring = &adapter->rx_rings[i];
1005
1006                 i40evf_alloc_rx_buffers_1buf(ring, ring->count);
1007                 ring->next_to_use = ring->count - 1;
1008                 writel(ring->next_to_use, ring->tail);
1009         }
1010 }
1011
1012 /**
1013  * i40evf_up_complete - Finish the last steps of bringing up a connection
1014  * @adapter: board private structure
1015  **/
1016 static int i40evf_up_complete(struct i40evf_adapter *adapter)
1017 {
1018         adapter->state = __I40EVF_RUNNING;
1019         clear_bit(__I40E_DOWN, &adapter->vsi.state);
1020
1021         i40evf_napi_enable_all(adapter);
1022
1023         adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES;
1024         mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
1025         return 0;
1026 }
1027
1028 /**
1029  * i40e_down - Shutdown the connection processing
1030  * @adapter: board private structure
1031  **/
1032 void i40evf_down(struct i40evf_adapter *adapter)
1033 {
1034         struct net_device *netdev = adapter->netdev;
1035         struct i40evf_mac_filter *f;
1036
1037         if (adapter->state <= __I40EVF_DOWN_PENDING)
1038                 return;
1039
1040         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1041                                 &adapter->crit_section))
1042                 usleep_range(500, 1000);
1043
1044         netif_carrier_off(netdev);
1045         netif_tx_disable(netdev);
1046         i40evf_napi_disable_all(adapter);
1047         i40evf_irq_disable(adapter);
1048
1049         /* remove all MAC filters */
1050         list_for_each_entry(f, &adapter->mac_filter_list, list) {
1051                 f->remove = true;
1052         }
1053         /* remove all VLAN filters */
1054         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
1055                 f->remove = true;
1056         }
1057         if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) &&
1058             adapter->state != __I40EVF_RESETTING) {
1059                 /* cancel any current operation */
1060                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1061                 /* Schedule operations to close down the HW. Don't wait
1062                  * here for this to complete. The watchdog is still running
1063                  * and it will take care of this.
1064                  */
1065                 adapter->aq_required = I40EVF_FLAG_AQ_DEL_MAC_FILTER;
1066                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
1067                 adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
1068         }
1069
1070         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1071 }
1072
1073 /**
1074  * i40evf_acquire_msix_vectors - Setup the MSIX capability
1075  * @adapter: board private structure
1076  * @vectors: number of vectors to request
1077  *
1078  * Work with the OS to set up the MSIX vectors needed.
1079  *
1080  * Returns 0 on success, negative on failure
1081  **/
1082 static int
1083 i40evf_acquire_msix_vectors(struct i40evf_adapter *adapter, int vectors)
1084 {
1085         int err, vector_threshold;
1086
1087         /* We'll want at least 3 (vector_threshold):
1088          * 0) Other (Admin Queue and link, mostly)
1089          * 1) TxQ[0] Cleanup
1090          * 2) RxQ[0] Cleanup
1091          */
1092         vector_threshold = MIN_MSIX_COUNT;
1093
1094         /* The more we get, the more we will assign to Tx/Rx Cleanup
1095          * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1096          * Right now, we simply care about how many we'll get; we'll
1097          * set them up later while requesting irq's.
1098          */
1099         err = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
1100                                     vector_threshold, vectors);
1101         if (err < 0) {
1102                 dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts\n");
1103                 kfree(adapter->msix_entries);
1104                 adapter->msix_entries = NULL;
1105                 return err;
1106         }
1107
1108         /* Adjust for only the vectors we'll use, which is minimum
1109          * of max_msix_q_vectors + NONQ_VECS, or the number of
1110          * vectors we were allocated.
1111          */
1112         adapter->num_msix_vectors = err;
1113         return 0;
1114 }
1115
1116 /**
1117  * i40evf_free_queues - Free memory for all rings
1118  * @adapter: board private structure to initialize
1119  *
1120  * Free all of the memory associated with queue pairs.
1121  **/
1122 static void i40evf_free_queues(struct i40evf_adapter *adapter)
1123 {
1124         if (!adapter->vsi_res)
1125                 return;
1126         kfree(adapter->tx_rings);
1127         adapter->tx_rings = NULL;
1128         kfree(adapter->rx_rings);
1129         adapter->rx_rings = NULL;
1130 }
1131
1132 /**
1133  * i40evf_alloc_queues - Allocate memory for all rings
1134  * @adapter: board private structure to initialize
1135  *
1136  * We allocate one ring per queue at run-time since we don't know the
1137  * number of queues at compile-time.  The polling_netdev array is
1138  * intended for Multiqueue, but should work fine with a single queue.
1139  **/
1140 static int i40evf_alloc_queues(struct i40evf_adapter *adapter)
1141 {
1142         int i;
1143
1144         adapter->tx_rings = kcalloc(adapter->num_active_queues,
1145                                     sizeof(struct i40e_ring), GFP_KERNEL);
1146         if (!adapter->tx_rings)
1147                 goto err_out;
1148         adapter->rx_rings = kcalloc(adapter->num_active_queues,
1149                                     sizeof(struct i40e_ring), GFP_KERNEL);
1150         if (!adapter->rx_rings)
1151                 goto err_out;
1152
1153         for (i = 0; i < adapter->num_active_queues; i++) {
1154                 struct i40e_ring *tx_ring;
1155                 struct i40e_ring *rx_ring;
1156
1157                 tx_ring = &adapter->tx_rings[i];
1158
1159                 tx_ring->queue_index = i;
1160                 tx_ring->netdev = adapter->netdev;
1161                 tx_ring->dev = &adapter->pdev->dev;
1162                 tx_ring->count = adapter->tx_desc_count;
1163                 if (adapter->flags & I40E_FLAG_WB_ON_ITR_CAPABLE)
1164                         tx_ring->flags |= I40E_TXR_FLAGS_WB_ON_ITR;
1165
1166                 rx_ring = &adapter->rx_rings[i];
1167                 rx_ring->queue_index = i;
1168                 rx_ring->netdev = adapter->netdev;
1169                 rx_ring->dev = &adapter->pdev->dev;
1170                 rx_ring->count = adapter->rx_desc_count;
1171         }
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
1200          * doesn't do us much good if we have a lot more vectors
1201          * than CPU's.  So let's be conservative and only ask for
1202          * (roughly) twice the number of vectors as there are CPU's.
1203          */
1204         v_budget = min_t(int, pairs, (int)(num_online_cpus() * 2)) + NONQ_VECS;
1205         v_budget = min_t(int, v_budget, (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 - Prepare for RSS using AQ commands
1227  * @vsi: vsi structure
1228  * @seed: RSS hash seed
1229  * @lut: Lookup table
1230  * @lut_size: Lookup table size
1231  *
1232  * Return 0 on success, negative on failure
1233  **/
1234 static int i40evf_config_rss_aq(struct i40e_vsi *vsi, const u8 *seed,
1235                                 u8 *lut, u16 lut_size)
1236 {
1237         struct i40evf_adapter *adapter = vsi->back;
1238         struct i40e_hw *hw = &adapter->hw;
1239         int ret = 0;
1240
1241         if (!vsi->id)
1242                 return -EINVAL;
1243
1244         if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
1245                 /* bail because we already have a command pending */
1246                 dev_err(&adapter->pdev->dev, "Cannot configure RSS, command %d pending\n",
1247                         adapter->current_op);
1248                 return -EBUSY;
1249         }
1250
1251         if (seed) {
1252                 struct i40e_aqc_get_set_rss_key_data *rss_key =
1253                         (struct i40e_aqc_get_set_rss_key_data *)seed;
1254                 ret = i40evf_aq_set_rss_key(hw, vsi->id, rss_key);
1255                 if (ret) {
1256                         dev_err(&adapter->pdev->dev, "Cannot set RSS key, err %s aq_err %s\n",
1257                                 i40evf_stat_str(hw, ret),
1258                                 i40evf_aq_str(hw, hw->aq.asq_last_status));
1259                         return ret;
1260                 }
1261         }
1262
1263         if (lut) {
1264                 ret = i40evf_aq_set_rss_lut(hw, vsi->id, false, lut, lut_size);
1265                 if (ret) {
1266                         dev_err(&adapter->pdev->dev,
1267                                 "Cannot set RSS lut, err %s aq_err %s\n",
1268                                 i40evf_stat_str(hw, ret),
1269                                 i40evf_aq_str(hw, hw->aq.asq_last_status));
1270                         return ret;
1271                 }
1272         }
1273
1274         return ret;
1275 }
1276
1277 /**
1278  * i40evf_config_rss_reg - Configure RSS keys and lut by writing registers
1279  * @vsi: Pointer to vsi structure
1280  * @seed: RSS hash seed
1281  * @lut: Lookup table
1282  * @lut_size: Lookup table size
1283  *
1284  * Returns 0 on success, negative on failure
1285  **/
1286 static int i40evf_config_rss_reg(struct i40e_vsi *vsi, const u8 *seed,
1287                                  const u8 *lut, u16 lut_size)
1288 {
1289         struct i40evf_adapter *adapter = vsi->back;
1290         struct i40e_hw *hw = &adapter->hw;
1291         u16 i;
1292
1293         if (seed) {
1294                 u32 *seed_dw = (u32 *)seed;
1295
1296                 for (i = 0; i <= I40E_VFQF_HKEY_MAX_INDEX; i++)
1297                         wr32(hw, I40E_VFQF_HKEY(i), seed_dw[i]);
1298         }
1299
1300         if (lut) {
1301                 u32 *lut_dw = (u32 *)lut;
1302
1303                 if (lut_size != I40EVF_HLUT_ARRAY_SIZE)
1304                         return -EINVAL;
1305
1306                 for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++)
1307                         wr32(hw, I40E_VFQF_HLUT(i), lut_dw[i]);
1308         }
1309         i40e_flush(hw);
1310
1311         return 0;
1312 }
1313
1314 /**
1315  *  * i40evf_get_rss_aq - Get RSS keys and lut by using AQ commands
1316  *  @vsi: Pointer to vsi structure
1317  *  @seed: RSS hash seed
1318  *  @lut: Lookup table
1319  *  @lut_size: Lookup table size
1320  *
1321  *  Return 0 on success, negative on failure
1322  **/
1323 static int i40evf_get_rss_aq(struct i40e_vsi *vsi, const u8 *seed,
1324                              u8 *lut, u16 lut_size)
1325 {
1326         struct i40evf_adapter *adapter = vsi->back;
1327         struct i40e_hw *hw = &adapter->hw;
1328         int ret = 0;
1329
1330         if (seed) {
1331                 ret = i40evf_aq_get_rss_key(hw, vsi->id,
1332                         (struct i40e_aqc_get_set_rss_key_data *)seed);
1333                 if (ret) {
1334                         dev_err(&adapter->pdev->dev,
1335                                 "Cannot get RSS key, err %s aq_err %s\n",
1336                                 i40evf_stat_str(hw, ret),
1337                                 i40evf_aq_str(hw, hw->aq.asq_last_status));
1338                         return ret;
1339                 }
1340         }
1341
1342         if (lut) {
1343                 ret = i40evf_aq_get_rss_lut(hw, vsi->id, seed, lut, lut_size);
1344                 if (ret) {
1345                         dev_err(&adapter->pdev->dev,
1346                                 "Cannot get RSS lut, err %s aq_err %s\n",
1347                                 i40evf_stat_str(hw, ret),
1348                                 i40evf_aq_str(hw, hw->aq.asq_last_status));
1349                         return ret;
1350                 }
1351         }
1352
1353         return ret;
1354 }
1355
1356 /**
1357  *  * i40evf_get_rss_reg - Get RSS keys and lut by reading registers
1358  *  @vsi: Pointer to vsi structure
1359  *  @seed: RSS hash seed
1360  *  @lut: Lookup table
1361  *  @lut_size: Lookup table size
1362  *
1363  *  Returns 0 on success, negative on failure
1364  **/
1365 static int i40evf_get_rss_reg(struct i40e_vsi *vsi, const u8 *seed,
1366                               const u8 *lut, u16 lut_size)
1367 {
1368         struct i40evf_adapter *adapter = vsi->back;
1369         struct i40e_hw *hw = &adapter->hw;
1370         u16 i;
1371
1372         if (seed) {
1373                 u32 *seed_dw = (u32 *)seed;
1374
1375                 for (i = 0; i <= I40E_VFQF_HKEY_MAX_INDEX; i++)
1376                         seed_dw[i] = rd32(hw, I40E_VFQF_HKEY(i));
1377         }
1378
1379         if (lut) {
1380                 u32 *lut_dw = (u32 *)lut;
1381
1382                 if (lut_size != I40EVF_HLUT_ARRAY_SIZE)
1383                         return -EINVAL;
1384
1385                 for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++)
1386                         lut_dw[i] = rd32(hw, I40E_VFQF_HLUT(i));
1387         }
1388
1389         return 0;
1390 }
1391
1392 /**
1393  * i40evf_config_rss - Configure RSS keys and lut
1394  * @vsi: Pointer to vsi structure
1395  * @seed: RSS hash seed
1396  * @lut: Lookup table
1397  * @lut_size: Lookup table size
1398  *
1399  * Returns 0 on success, negative on failure
1400  **/
1401 int i40evf_config_rss(struct i40e_vsi *vsi, const u8 *seed,
1402                       u8 *lut, u16 lut_size)
1403 {
1404         struct i40evf_adapter *adapter = vsi->back;
1405
1406         if (RSS_AQ(adapter))
1407                 return i40evf_config_rss_aq(vsi, seed, lut, lut_size);
1408         else
1409                 return i40evf_config_rss_reg(vsi, seed, lut, lut_size);
1410 }
1411
1412 /**
1413  * i40evf_get_rss - Get RSS keys and lut
1414  * @vsi: Pointer to vsi structure
1415  * @seed: RSS hash seed
1416  * @lut: Lookup table
1417  * @lut_size: Lookup table size
1418  *
1419  * Returns 0 on success, negative on failure
1420  **/
1421 int i40evf_get_rss(struct i40e_vsi *vsi, const u8 *seed, u8 *lut, u16 lut_size)
1422 {
1423         struct i40evf_adapter *adapter = vsi->back;
1424
1425         if (RSS_AQ(adapter))
1426                 return i40evf_get_rss_aq(vsi, seed, lut, lut_size);
1427         else
1428                 return i40evf_get_rss_reg(vsi, seed, lut, lut_size);
1429 }
1430
1431 /**
1432  * i40evf_fill_rss_lut - Fill the lut with default values
1433  * @lut: Lookup table to be filled with
1434  * @rss_table_size: Lookup table size
1435  * @rss_size: Range of queue number for hashing
1436  **/
1437 static void i40evf_fill_rss_lut(u8 *lut, u16 rss_table_size, u16 rss_size)
1438 {
1439         u16 i;
1440
1441         for (i = 0; i < rss_table_size; i++)
1442                 lut[i] = i % rss_size;
1443 }
1444
1445 /**
1446  * i40evf_init_rss - Prepare for RSS
1447  * @adapter: board private structure
1448  *
1449  * Return 0 on success, negative on failure
1450  **/
1451 static int i40evf_init_rss(struct i40evf_adapter *adapter)
1452 {
1453         struct i40e_vsi *vsi = &adapter->vsi;
1454         struct i40e_hw *hw = &adapter->hw;
1455         u8 seed[I40EVF_HKEY_ARRAY_SIZE];
1456         u64 hena;
1457         u8 *lut;
1458         int ret;
1459
1460         /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
1461         if (adapter->vf_res->vf_offload_flags &
1462                                         I40E_VIRTCHNL_VF_OFFLOAD_RSS_PCTYPE_V2)
1463                 hena = I40E_DEFAULT_RSS_HENA_EXPANDED;
1464         else
1465                 hena = I40E_DEFAULT_RSS_HENA;
1466         wr32(hw, I40E_VFQF_HENA(0), (u32)hena);
1467         wr32(hw, I40E_VFQF_HENA(1), (u32)(hena >> 32));
1468
1469         lut = kzalloc(I40EVF_HLUT_ARRAY_SIZE, GFP_KERNEL);
1470         if (!lut)
1471                 return -ENOMEM;
1472
1473         /* Use user configured lut if there is one, otherwise use default */
1474         if (vsi->rss_lut_user)
1475                 memcpy(lut, vsi->rss_lut_user, I40EVF_HLUT_ARRAY_SIZE);
1476         else
1477                 i40evf_fill_rss_lut(lut, I40EVF_HLUT_ARRAY_SIZE,
1478                                     adapter->num_active_queues);
1479
1480         /* Use user configured hash key if there is one, otherwise
1481          * user default.
1482          */
1483         if (vsi->rss_hkey_user)
1484                 memcpy(seed, vsi->rss_hkey_user, I40EVF_HKEY_ARRAY_SIZE);
1485         else
1486                 netdev_rss_key_fill((void *)seed, I40EVF_HKEY_ARRAY_SIZE);
1487         ret = i40evf_config_rss(vsi, seed, lut, I40EVF_HLUT_ARRAY_SIZE);
1488         kfree(lut);
1489
1490         return ret;
1491 }
1492
1493 /**
1494  * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors
1495  * @adapter: board private structure to initialize
1496  *
1497  * We allocate one q_vector per queue interrupt.  If allocation fails we
1498  * return -ENOMEM.
1499  **/
1500 static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
1501 {
1502         int q_idx = 0, num_q_vectors;
1503         struct i40e_q_vector *q_vector;
1504
1505         num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1506         adapter->q_vectors = kcalloc(num_q_vectors, sizeof(*q_vector),
1507                                      GFP_KERNEL);
1508         if (!adapter->q_vectors)
1509                 goto err_out;
1510
1511         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1512                 q_vector = &adapter->q_vectors[q_idx];
1513                 q_vector->adapter = adapter;
1514                 q_vector->vsi = &adapter->vsi;
1515                 q_vector->v_idx = q_idx;
1516                 netif_napi_add(adapter->netdev, &q_vector->napi,
1517                                i40evf_napi_poll, NAPI_POLL_WEIGHT);
1518         }
1519
1520         return 0;
1521
1522 err_out:
1523         while (q_idx) {
1524                 q_idx--;
1525                 q_vector = &adapter->q_vectors[q_idx];
1526                 netif_napi_del(&q_vector->napi);
1527         }
1528         kfree(adapter->q_vectors);
1529         return -ENOMEM;
1530 }
1531
1532 /**
1533  * i40evf_free_q_vectors - Free memory allocated for interrupt vectors
1534  * @adapter: board private structure to initialize
1535  *
1536  * This function frees the memory allocated to the q_vectors.  In addition if
1537  * NAPI is enabled it will delete any references to the NAPI struct prior
1538  * to freeing the q_vector.
1539  **/
1540 static void i40evf_free_q_vectors(struct i40evf_adapter *adapter)
1541 {
1542         int q_idx, num_q_vectors;
1543         int napi_vectors;
1544
1545         num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1546         napi_vectors = adapter->num_active_queues;
1547
1548         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1549                 struct i40e_q_vector *q_vector = &adapter->q_vectors[q_idx];
1550                 if (q_idx < napi_vectors)
1551                         netif_napi_del(&q_vector->napi);
1552         }
1553         kfree(adapter->q_vectors);
1554 }
1555
1556 /**
1557  * i40evf_reset_interrupt_capability - Reset MSIX setup
1558  * @adapter: board private structure
1559  *
1560  **/
1561 void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
1562 {
1563         pci_disable_msix(adapter->pdev);
1564         kfree(adapter->msix_entries);
1565         adapter->msix_entries = NULL;
1566 }
1567
1568 /**
1569  * i40evf_init_interrupt_scheme - Determine if MSIX is supported and init
1570  * @adapter: board private structure to initialize
1571  *
1572  **/
1573 int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter)
1574 {
1575         int err;
1576
1577         err = i40evf_set_interrupt_capability(adapter);
1578         if (err) {
1579                 dev_err(&adapter->pdev->dev,
1580                         "Unable to setup interrupt capabilities\n");
1581                 goto err_set_interrupt;
1582         }
1583
1584         err = i40evf_alloc_q_vectors(adapter);
1585         if (err) {
1586                 dev_err(&adapter->pdev->dev,
1587                         "Unable to allocate memory for queue vectors\n");
1588                 goto err_alloc_q_vectors;
1589         }
1590
1591         err = i40evf_alloc_queues(adapter);
1592         if (err) {
1593                 dev_err(&adapter->pdev->dev,
1594                         "Unable to allocate memory for queues\n");
1595                 goto err_alloc_queues;
1596         }
1597
1598         dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
1599                  (adapter->num_active_queues > 1) ? "Enabled" : "Disabled",
1600                  adapter->num_active_queues);
1601
1602         return 0;
1603 err_alloc_queues:
1604         i40evf_free_q_vectors(adapter);
1605 err_alloc_q_vectors:
1606         i40evf_reset_interrupt_capability(adapter);
1607 err_set_interrupt:
1608         return err;
1609 }
1610
1611 /**
1612  * i40evf_clear_rss_config_user - Clear user configurations of RSS
1613  * @vsi: Pointer to VSI structure
1614  **/
1615 static void i40evf_clear_rss_config_user(struct i40e_vsi *vsi)
1616 {
1617         if (!vsi)
1618                 return;
1619
1620         kfree(vsi->rss_hkey_user);
1621         vsi->rss_hkey_user = NULL;
1622
1623         kfree(vsi->rss_lut_user);
1624         vsi->rss_lut_user = NULL;
1625 }
1626
1627 /**
1628  * i40evf_watchdog_timer - Periodic call-back timer
1629  * @data: pointer to adapter disguised as unsigned long
1630  **/
1631 static void i40evf_watchdog_timer(unsigned long data)
1632 {
1633         struct i40evf_adapter *adapter = (struct i40evf_adapter *)data;
1634
1635         schedule_work(&adapter->watchdog_task);
1636         /* timer will be rescheduled in watchdog task */
1637 }
1638
1639 /**
1640  * i40evf_watchdog_task - Periodic call-back task
1641  * @work: pointer to work_struct
1642  **/
1643 static void i40evf_watchdog_task(struct work_struct *work)
1644 {
1645         struct i40evf_adapter *adapter = container_of(work,
1646                                                       struct i40evf_adapter,
1647                                                       watchdog_task);
1648         struct i40e_hw *hw = &adapter->hw;
1649         u32 reg_val;
1650
1651         if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
1652                 goto restart_watchdog;
1653
1654         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1655                 reg_val = rd32(hw, I40E_VFGEN_RSTAT) &
1656                           I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1657                 if ((reg_val == I40E_VFR_VFACTIVE) ||
1658                     (reg_val == I40E_VFR_COMPLETED)) {
1659                         /* A chance for redemption! */
1660                         dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
1661                         adapter->state = __I40EVF_STARTUP;
1662                         adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1663                         schedule_delayed_work(&adapter->init_task, 10);
1664                         clear_bit(__I40EVF_IN_CRITICAL_TASK,
1665                                   &adapter->crit_section);
1666                         /* Don't reschedule the watchdog, since we've restarted
1667                          * the init task. When init_task contacts the PF and
1668                          * gets everything set up again, it'll restart the
1669                          * watchdog for us. Down, boy. Sit. Stay. Woof.
1670                          */
1671                         return;
1672                 }
1673                 adapter->aq_required = 0;
1674                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1675                 goto watchdog_done;
1676         }
1677
1678         if ((adapter->state < __I40EVF_DOWN) ||
1679             (adapter->flags & I40EVF_FLAG_RESET_PENDING))
1680                 goto watchdog_done;
1681
1682         /* check for reset */
1683         reg_val = rd32(hw, I40E_VF_ARQLEN1) & I40E_VF_ARQLEN1_ARQENABLE_MASK;
1684         if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) && !reg_val) {
1685                 adapter->state = __I40EVF_RESETTING;
1686                 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1687                 dev_err(&adapter->pdev->dev, "Hardware reset detected\n");
1688                 schedule_work(&adapter->reset_task);
1689                 adapter->aq_required = 0;
1690                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1691                 goto watchdog_done;
1692         }
1693
1694         /* Process admin queue tasks. After init, everything gets done
1695          * here so we don't race on the admin queue.
1696          */
1697         if (adapter->current_op) {
1698                 if (!i40evf_asq_done(hw)) {
1699                         dev_dbg(&adapter->pdev->dev, "Admin queue timeout\n");
1700                         i40evf_send_api_ver(adapter);
1701                 }
1702                 goto watchdog_done;
1703         }
1704         if (adapter->aq_required & I40EVF_FLAG_AQ_GET_CONFIG) {
1705                 i40evf_send_vf_config_msg(adapter);
1706                 goto watchdog_done;
1707         }
1708
1709         if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
1710                 i40evf_disable_queues(adapter);
1711                 goto watchdog_done;
1712         }
1713
1714         if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
1715                 i40evf_map_queues(adapter);
1716                 goto watchdog_done;
1717         }
1718
1719         if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
1720                 i40evf_add_ether_addrs(adapter);
1721                 goto watchdog_done;
1722         }
1723
1724         if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
1725                 i40evf_add_vlans(adapter);
1726                 goto watchdog_done;
1727         }
1728
1729         if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
1730                 i40evf_del_ether_addrs(adapter);
1731                 goto watchdog_done;
1732         }
1733
1734         if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
1735                 i40evf_del_vlans(adapter);
1736                 goto watchdog_done;
1737         }
1738
1739         if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
1740                 i40evf_configure_queues(adapter);
1741                 goto watchdog_done;
1742         }
1743
1744         if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
1745                 i40evf_enable_queues(adapter);
1746                 goto watchdog_done;
1747         }
1748
1749         if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_RSS) {
1750                 /* This message goes straight to the firmware, not the
1751                  * PF, so we don't have to set current_op as we will
1752                  * not get a response through the ARQ.
1753                  */
1754                 i40evf_init_rss(adapter);
1755                 adapter->aq_required &= ~I40EVF_FLAG_AQ_CONFIGURE_RSS;
1756                 goto watchdog_done;
1757         }
1758
1759         if (adapter->state == __I40EVF_RUNNING)
1760                 i40evf_request_stats(adapter);
1761 watchdog_done:
1762         if (adapter->state == __I40EVF_RUNNING) {
1763                 i40evf_irq_enable_queues(adapter, ~0);
1764                 i40evf_fire_sw_int(adapter, 0xFF);
1765         } else {
1766                 i40evf_fire_sw_int(adapter, 0x1);
1767         }
1768
1769         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1770 restart_watchdog:
1771         if (adapter->state == __I40EVF_REMOVE)
1772                 return;
1773         if (adapter->aq_required)
1774                 mod_timer(&adapter->watchdog_timer,
1775                           jiffies + msecs_to_jiffies(20));
1776         else
1777                 mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
1778         schedule_work(&adapter->adminq_task);
1779 }
1780
1781 #define I40EVF_RESET_WAIT_MS 10
1782 #define I40EVF_RESET_WAIT_COUNT 500
1783 /**
1784  * i40evf_reset_task - Call-back task to handle hardware reset
1785  * @work: pointer to work_struct
1786  *
1787  * During reset we need to shut down and reinitialize the admin queue
1788  * before we can use it to communicate with the PF again. We also clear
1789  * and reinit the rings because that context is lost as well.
1790  **/
1791 static void i40evf_reset_task(struct work_struct *work)
1792 {
1793         struct i40evf_adapter *adapter = container_of(work,
1794                                                       struct i40evf_adapter,
1795                                                       reset_task);
1796         struct net_device *netdev = adapter->netdev;
1797         struct i40e_hw *hw = &adapter->hw;
1798         struct i40evf_vlan_filter *vlf;
1799         struct i40evf_mac_filter *f;
1800         u32 reg_val;
1801         int i = 0, err;
1802
1803         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1804                                 &adapter->crit_section))
1805                 usleep_range(500, 1000);
1806
1807         i40evf_misc_irq_disable(adapter);
1808         if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) {
1809                 adapter->flags &= ~I40EVF_FLAG_RESET_NEEDED;
1810                 /* Restart the AQ here. If we have been reset but didn't
1811                  * detect it, or if the PF had to reinit, our AQ will be hosed.
1812                  */
1813                 i40evf_shutdown_adminq(hw);
1814                 i40evf_init_adminq(hw);
1815                 i40evf_request_reset(adapter);
1816         }
1817         adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1818
1819         /* poll until we see the reset actually happen */
1820         for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1821                 reg_val = rd32(hw, I40E_VF_ARQLEN1) &
1822                           I40E_VF_ARQLEN1_ARQENABLE_MASK;
1823                 if (!reg_val)
1824                         break;
1825                 usleep_range(5000, 10000);
1826         }
1827         if (i == I40EVF_RESET_WAIT_COUNT) {
1828                 dev_info(&adapter->pdev->dev, "Never saw reset\n");
1829                 goto continue_reset; /* act like the reset happened */
1830         }
1831
1832         /* wait until the reset is complete and the PF is responding to us */
1833         for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1834                 reg_val = rd32(hw, I40E_VFGEN_RSTAT) &
1835                           I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1836                 if (reg_val == I40E_VFR_VFACTIVE)
1837                         break;
1838                 msleep(I40EVF_RESET_WAIT_MS);
1839         }
1840         pci_set_master(adapter->pdev);
1841         /* extra wait to make sure minimum wait is met */
1842         msleep(I40EVF_RESET_WAIT_MS);
1843         if (i == I40EVF_RESET_WAIT_COUNT) {
1844                 struct i40evf_mac_filter *ftmp;
1845                 struct i40evf_vlan_filter *fv, *fvtmp;
1846
1847                 /* reset never finished */
1848                 dev_err(&adapter->pdev->dev, "Reset never finished (%x)\n",
1849                         reg_val);
1850                 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
1851
1852                 if (netif_running(adapter->netdev)) {
1853                         set_bit(__I40E_DOWN, &adapter->vsi.state);
1854                         netif_carrier_off(netdev);
1855                         netif_tx_disable(netdev);
1856                         i40evf_napi_disable_all(adapter);
1857                         i40evf_irq_disable(adapter);
1858                         i40evf_free_traffic_irqs(adapter);
1859                         i40evf_free_all_tx_resources(adapter);
1860                         i40evf_free_all_rx_resources(adapter);
1861                 }
1862
1863                 /* Delete all of the filters, both MAC and VLAN. */
1864                 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list,
1865                                          list) {
1866                         list_del(&f->list);
1867                         kfree(f);
1868                 }
1869
1870                 list_for_each_entry_safe(fv, fvtmp, &adapter->vlan_filter_list,
1871                                          list) {
1872                         list_del(&fv->list);
1873                         kfree(fv);
1874                 }
1875
1876                 i40evf_free_misc_irq(adapter);
1877                 i40evf_reset_interrupt_capability(adapter);
1878                 i40evf_free_queues(adapter);
1879                 i40evf_free_q_vectors(adapter);
1880                 kfree(adapter->vf_res);
1881                 i40evf_shutdown_adminq(hw);
1882                 adapter->netdev->flags &= ~IFF_UP;
1883                 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1884                 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1885                 dev_info(&adapter->pdev->dev, "Reset task did not complete, VF disabled\n");
1886                 return; /* Do not attempt to reinit. It's dead, Jim. */
1887         }
1888
1889 continue_reset:
1890         if (netif_running(adapter->netdev)) {
1891                 netif_carrier_off(netdev);
1892                 netif_tx_stop_all_queues(netdev);
1893                 i40evf_napi_disable_all(adapter);
1894         }
1895         i40evf_irq_disable(adapter);
1896
1897         adapter->state = __I40EVF_RESETTING;
1898         adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1899
1900         /* free the Tx/Rx rings and descriptors, might be better to just
1901          * re-use them sometime in the future
1902          */
1903         i40evf_free_all_rx_resources(adapter);
1904         i40evf_free_all_tx_resources(adapter);
1905
1906         /* kill and reinit the admin queue */
1907         if (i40evf_shutdown_adminq(hw))
1908                 dev_warn(&adapter->pdev->dev, "Failed to shut down adminq\n");
1909         adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1910         err = i40evf_init_adminq(hw);
1911         if (err)
1912                 dev_info(&adapter->pdev->dev, "Failed to init adminq: %d\n",
1913                          err);
1914
1915         adapter->aq_required = I40EVF_FLAG_AQ_GET_CONFIG;
1916         adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
1917
1918         /* re-add all MAC filters */
1919         list_for_each_entry(f, &adapter->mac_filter_list, list) {
1920                 f->add = true;
1921         }
1922         /* re-add all VLAN filters */
1923         list_for_each_entry(vlf, &adapter->vlan_filter_list, list) {
1924                 vlf->add = true;
1925         }
1926         adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
1927         adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
1928         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1929         i40evf_misc_irq_enable(adapter);
1930
1931         mod_timer(&adapter->watchdog_timer, jiffies + 2);
1932
1933         if (netif_running(adapter->netdev)) {
1934                 /* allocate transmit descriptors */
1935                 err = i40evf_setup_all_tx_resources(adapter);
1936                 if (err)
1937                         goto reset_err;
1938
1939                 /* allocate receive descriptors */
1940                 err = i40evf_setup_all_rx_resources(adapter);
1941                 if (err)
1942                         goto reset_err;
1943
1944                 i40evf_configure(adapter);
1945
1946                 err = i40evf_up_complete(adapter);
1947                 if (err)
1948                         goto reset_err;
1949
1950                 i40evf_irq_enable(adapter, true);
1951         } else {
1952                 adapter->state = __I40EVF_DOWN;
1953         }
1954
1955         return;
1956 reset_err:
1957         dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
1958         i40evf_close(adapter->netdev);
1959 }
1960
1961 /**
1962  * i40evf_adminq_task - worker thread to clean the admin queue
1963  * @work: pointer to work_struct containing our data
1964  **/
1965 static void i40evf_adminq_task(struct work_struct *work)
1966 {
1967         struct i40evf_adapter *adapter =
1968                 container_of(work, struct i40evf_adapter, adminq_task);
1969         struct i40e_hw *hw = &adapter->hw;
1970         struct i40e_arq_event_info event;
1971         struct i40e_virtchnl_msg *v_msg;
1972         i40e_status ret;
1973         u32 val, oldval;
1974         u16 pending;
1975
1976         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
1977                 goto out;
1978
1979         event.buf_len = I40EVF_MAX_AQ_BUF_SIZE;
1980         event.msg_buf = kzalloc(event.buf_len, GFP_KERNEL);
1981         if (!event.msg_buf)
1982                 goto out;
1983
1984         v_msg = (struct i40e_virtchnl_msg *)&event.desc;
1985         do {
1986                 ret = i40evf_clean_arq_element(hw, &event, &pending);
1987                 if (ret || !v_msg->v_opcode)
1988                         break; /* No event to process or error cleaning ARQ */
1989
1990                 i40evf_virtchnl_completion(adapter, v_msg->v_opcode,
1991                                            v_msg->v_retval, event.msg_buf,
1992                                            event.msg_len);
1993                 if (pending != 0)
1994                         memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
1995         } while (pending);
1996
1997         if ((adapter->flags &
1998              (I40EVF_FLAG_RESET_PENDING | I40EVF_FLAG_RESET_NEEDED)) ||
1999             adapter->state == __I40EVF_RESETTING)
2000                 goto freedom;
2001
2002         /* check for error indications */
2003         val = rd32(hw, hw->aq.arq.len);
2004         oldval = val;
2005         if (val & I40E_VF_ARQLEN1_ARQVFE_MASK) {
2006                 dev_info(&adapter->pdev->dev, "ARQ VF Error detected\n");
2007                 val &= ~I40E_VF_ARQLEN1_ARQVFE_MASK;
2008         }
2009         if (val & I40E_VF_ARQLEN1_ARQOVFL_MASK) {
2010                 dev_info(&adapter->pdev->dev, "ARQ Overflow Error detected\n");
2011                 val &= ~I40E_VF_ARQLEN1_ARQOVFL_MASK;
2012         }
2013         if (val & I40E_VF_ARQLEN1_ARQCRIT_MASK) {
2014                 dev_info(&adapter->pdev->dev, "ARQ Critical Error detected\n");
2015                 val &= ~I40E_VF_ARQLEN1_ARQCRIT_MASK;
2016         }
2017         if (oldval != val)
2018                 wr32(hw, hw->aq.arq.len, val);
2019
2020         val = rd32(hw, hw->aq.asq.len);
2021         oldval = val;
2022         if (val & I40E_VF_ATQLEN1_ATQVFE_MASK) {
2023                 dev_info(&adapter->pdev->dev, "ASQ VF Error detected\n");
2024                 val &= ~I40E_VF_ATQLEN1_ATQVFE_MASK;
2025         }
2026         if (val & I40E_VF_ATQLEN1_ATQOVFL_MASK) {
2027                 dev_info(&adapter->pdev->dev, "ASQ Overflow Error detected\n");
2028                 val &= ~I40E_VF_ATQLEN1_ATQOVFL_MASK;
2029         }
2030         if (val & I40E_VF_ATQLEN1_ATQCRIT_MASK) {
2031                 dev_info(&adapter->pdev->dev, "ASQ Critical Error detected\n");
2032                 val &= ~I40E_VF_ATQLEN1_ATQCRIT_MASK;
2033         }
2034         if (oldval != val)
2035                 wr32(hw, hw->aq.asq.len, val);
2036
2037 freedom:
2038         kfree(event.msg_buf);
2039 out:
2040         /* re-enable Admin queue interrupt cause */
2041         i40evf_misc_irq_enable(adapter);
2042 }
2043
2044 /**
2045  * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
2046  * @adapter: board private structure
2047  *
2048  * Free all transmit software resources
2049  **/
2050 void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
2051 {
2052         int i;
2053
2054         if (!adapter->tx_rings)
2055                 return;
2056
2057         for (i = 0; i < adapter->num_active_queues; i++)
2058                 if (adapter->tx_rings[i].desc)
2059                         i40evf_free_tx_resources(&adapter->tx_rings[i]);
2060 }
2061
2062 /**
2063  * i40evf_setup_all_tx_resources - allocate all queues Tx resources
2064  * @adapter: board private structure
2065  *
2066  * If this function returns with an error, then it's possible one or
2067  * more of the rings is populated (while the rest are not).  It is the
2068  * callers duty to clean those orphaned rings.
2069  *
2070  * Return 0 on success, negative on failure
2071  **/
2072 static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter)
2073 {
2074         int i, err = 0;
2075
2076         for (i = 0; i < adapter->num_active_queues; i++) {
2077                 adapter->tx_rings[i].count = adapter->tx_desc_count;
2078                 err = i40evf_setup_tx_descriptors(&adapter->tx_rings[i]);
2079                 if (!err)
2080                         continue;
2081                 dev_err(&adapter->pdev->dev,
2082                         "Allocation for Tx Queue %u failed\n", i);
2083                 break;
2084         }
2085
2086         return err;
2087 }
2088
2089 /**
2090  * i40evf_setup_all_rx_resources - allocate all queues Rx resources
2091  * @adapter: board private structure
2092  *
2093  * If this function returns with an error, then it's possible one or
2094  * more of the rings is populated (while the rest are not).  It is the
2095  * callers duty to clean those orphaned rings.
2096  *
2097  * Return 0 on success, negative on failure
2098  **/
2099 static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter)
2100 {
2101         int i, err = 0;
2102
2103         for (i = 0; i < adapter->num_active_queues; i++) {
2104                 adapter->rx_rings[i].count = adapter->rx_desc_count;
2105                 err = i40evf_setup_rx_descriptors(&adapter->rx_rings[i]);
2106                 if (!err)
2107                         continue;
2108                 dev_err(&adapter->pdev->dev,
2109                         "Allocation for Rx Queue %u failed\n", i);
2110                 break;
2111         }
2112         return err;
2113 }
2114
2115 /**
2116  * i40evf_free_all_rx_resources - Free Rx Resources for All Queues
2117  * @adapter: board private structure
2118  *
2119  * Free all receive software resources
2120  **/
2121 void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
2122 {
2123         int i;
2124
2125         if (!adapter->rx_rings)
2126                 return;
2127
2128         for (i = 0; i < adapter->num_active_queues; i++)
2129                 if (adapter->rx_rings[i].desc)
2130                         i40evf_free_rx_resources(&adapter->rx_rings[i]);
2131 }
2132
2133 /**
2134  * i40evf_open - Called when a network interface is made active
2135  * @netdev: network interface device structure
2136  *
2137  * Returns 0 on success, negative value on failure
2138  *
2139  * The open entry point is called when a network interface is made
2140  * active by the system (IFF_UP).  At this point all resources needed
2141  * for transmit and receive operations are allocated, the interrupt
2142  * handler is registered with the OS, the watchdog timer is started,
2143  * and the stack is notified that the interface is ready.
2144  **/
2145 static int i40evf_open(struct net_device *netdev)
2146 {
2147         struct i40evf_adapter *adapter = netdev_priv(netdev);
2148         int err;
2149
2150         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
2151                 dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
2152                 return -EIO;
2153         }
2154
2155         if (adapter->state != __I40EVF_DOWN)
2156                 return -EBUSY;
2157
2158         /* allocate transmit descriptors */
2159         err = i40evf_setup_all_tx_resources(adapter);
2160         if (err)
2161                 goto err_setup_tx;
2162
2163         /* allocate receive descriptors */
2164         err = i40evf_setup_all_rx_resources(adapter);
2165         if (err)
2166                 goto err_setup_rx;
2167
2168         /* clear any pending interrupts, may auto mask */
2169         err = i40evf_request_traffic_irqs(adapter, netdev->name);
2170         if (err)
2171                 goto err_req_irq;
2172
2173         i40evf_add_filter(adapter, adapter->hw.mac.addr);
2174         i40evf_configure(adapter);
2175
2176         err = i40evf_up_complete(adapter);
2177         if (err)
2178                 goto err_req_irq;
2179
2180         i40evf_irq_enable(adapter, true);
2181
2182         return 0;
2183
2184 err_req_irq:
2185         i40evf_down(adapter);
2186         i40evf_free_traffic_irqs(adapter);
2187 err_setup_rx:
2188         i40evf_free_all_rx_resources(adapter);
2189 err_setup_tx:
2190         i40evf_free_all_tx_resources(adapter);
2191
2192         return err;
2193 }
2194
2195 /**
2196  * i40evf_close - Disables a network interface
2197  * @netdev: network interface device structure
2198  *
2199  * Returns 0, this is not allowed to fail
2200  *
2201  * The close entry point is called when an interface is de-activated
2202  * by the OS.  The hardware is still under the drivers control, but
2203  * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
2204  * are freed, along with all transmit and receive resources.
2205  **/
2206 static int i40evf_close(struct net_device *netdev)
2207 {
2208         struct i40evf_adapter *adapter = netdev_priv(netdev);
2209
2210         if (adapter->state <= __I40EVF_DOWN_PENDING)
2211                 return 0;
2212
2213
2214         set_bit(__I40E_DOWN, &adapter->vsi.state);
2215
2216         i40evf_down(adapter);
2217         adapter->state = __I40EVF_DOWN_PENDING;
2218         i40evf_free_traffic_irqs(adapter);
2219
2220         return 0;
2221 }
2222
2223 /**
2224  * i40evf_get_stats - Get System Network Statistics
2225  * @netdev: network interface device structure
2226  *
2227  * Returns the address of the device statistics structure.
2228  * The statistics are actually updated from the timer callback.
2229  **/
2230 static struct net_device_stats *i40evf_get_stats(struct net_device *netdev)
2231 {
2232         struct i40evf_adapter *adapter = netdev_priv(netdev);
2233
2234         /* only return the current stats */
2235         return &adapter->net_stats;
2236 }
2237
2238 /**
2239  * i40evf_change_mtu - Change the Maximum Transfer Unit
2240  * @netdev: network interface device structure
2241  * @new_mtu: new value for maximum frame size
2242  *
2243  * Returns 0 on success, negative on failure
2244  **/
2245 static int i40evf_change_mtu(struct net_device *netdev, int new_mtu)
2246 {
2247         struct i40evf_adapter *adapter = netdev_priv(netdev);
2248         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
2249
2250         if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
2251                 return -EINVAL;
2252
2253         netdev->mtu = new_mtu;
2254         adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
2255         schedule_work(&adapter->reset_task);
2256
2257         return 0;
2258 }
2259
2260 static const struct net_device_ops i40evf_netdev_ops = {
2261         .ndo_open               = i40evf_open,
2262         .ndo_stop               = i40evf_close,
2263         .ndo_start_xmit         = i40evf_xmit_frame,
2264         .ndo_get_stats          = i40evf_get_stats,
2265         .ndo_set_rx_mode        = i40evf_set_rx_mode,
2266         .ndo_validate_addr      = eth_validate_addr,
2267         .ndo_set_mac_address    = i40evf_set_mac,
2268         .ndo_change_mtu         = i40evf_change_mtu,
2269         .ndo_tx_timeout         = i40evf_tx_timeout,
2270         .ndo_vlan_rx_add_vid    = i40evf_vlan_rx_add_vid,
2271         .ndo_vlan_rx_kill_vid   = i40evf_vlan_rx_kill_vid,
2272 #ifdef CONFIG_NET_POLL_CONTROLLER
2273         .ndo_poll_controller    = i40evf_netpoll,
2274 #endif
2275 };
2276
2277 /**
2278  * i40evf_check_reset_complete - check that VF reset is complete
2279  * @hw: pointer to hw struct
2280  *
2281  * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
2282  **/
2283 static int i40evf_check_reset_complete(struct i40e_hw *hw)
2284 {
2285         u32 rstat;
2286         int i;
2287
2288         for (i = 0; i < 100; i++) {
2289                 rstat = rd32(hw, I40E_VFGEN_RSTAT) &
2290                             I40E_VFGEN_RSTAT_VFR_STATE_MASK;
2291                 if ((rstat == I40E_VFR_VFACTIVE) ||
2292                     (rstat == I40E_VFR_COMPLETED))
2293                         return 0;
2294                 usleep_range(10, 20);
2295         }
2296         return -EBUSY;
2297 }
2298
2299 /**
2300  * i40evf_process_config - Process the config information we got from the PF
2301  * @adapter: board private structure
2302  *
2303  * Verify that we have a valid config struct, and set up our netdev features
2304  * and our VSI struct.
2305  **/
2306 int i40evf_process_config(struct i40evf_adapter *adapter)
2307 {
2308         struct net_device *netdev = adapter->netdev;
2309         int i;
2310
2311         /* got VF config message back from PF, now we can parse it */
2312         for (i = 0; i < adapter->vf_res->num_vsis; i++) {
2313                 if (adapter->vf_res->vsi_res[i].vsi_type == I40E_VSI_SRIOV)
2314                         adapter->vsi_res = &adapter->vf_res->vsi_res[i];
2315         }
2316         if (!adapter->vsi_res) {
2317                 dev_err(&adapter->pdev->dev, "No LAN VSI found\n");
2318                 return -ENODEV;
2319         }
2320
2321         if (adapter->vf_res->vf_offload_flags
2322             & I40E_VIRTCHNL_VF_OFFLOAD_VLAN) {
2323                 netdev->vlan_features = netdev->features &
2324                                         ~(NETIF_F_HW_VLAN_CTAG_TX |
2325                                           NETIF_F_HW_VLAN_CTAG_RX |
2326                                           NETIF_F_HW_VLAN_CTAG_FILTER);
2327                 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX |
2328                                     NETIF_F_HW_VLAN_CTAG_RX |
2329                                     NETIF_F_HW_VLAN_CTAG_FILTER;
2330         }
2331         netdev->features |= NETIF_F_HIGHDMA |
2332                             NETIF_F_SG |
2333                             NETIF_F_IP_CSUM |
2334                             NETIF_F_SCTP_CRC |
2335                             NETIF_F_IPV6_CSUM |
2336                             NETIF_F_TSO |
2337                             NETIF_F_TSO6 |
2338                             NETIF_F_RXCSUM |
2339                             NETIF_F_GRO;
2340
2341         /* copy netdev features into list of user selectable features */
2342         netdev->hw_features |= netdev->features;
2343         netdev->hw_features &= ~NETIF_F_RXCSUM;
2344
2345         adapter->vsi.id = adapter->vsi_res->vsi_id;
2346
2347         adapter->vsi.back = adapter;
2348         adapter->vsi.base_vector = 1;
2349         adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
2350         adapter->vsi.rx_itr_setting = (I40E_ITR_DYNAMIC |
2351                                        ITR_REG_TO_USEC(I40E_ITR_RX_DEF));
2352         adapter->vsi.tx_itr_setting = (I40E_ITR_DYNAMIC |
2353                                        ITR_REG_TO_USEC(I40E_ITR_TX_DEF));
2354         adapter->vsi.netdev = adapter->netdev;
2355         adapter->vsi.qs_handle = adapter->vsi_res->qset_handle;
2356         return 0;
2357 }
2358
2359 /**
2360  * i40evf_init_task - worker thread to perform delayed initialization
2361  * @work: pointer to work_struct containing our data
2362  *
2363  * This task completes the work that was begun in probe. Due to the nature
2364  * of VF-PF communications, we may need to wait tens of milliseconds to get
2365  * responses back from the PF. Rather than busy-wait in probe and bog down the
2366  * whole system, we'll do it in a task so we can sleep.
2367  * This task only runs during driver init. Once we've established
2368  * communications with the PF driver and set up our netdev, the watchdog
2369  * takes over.
2370  **/
2371 static void i40evf_init_task(struct work_struct *work)
2372 {
2373         struct i40evf_adapter *adapter = container_of(work,
2374                                                       struct i40evf_adapter,
2375                                                       init_task.work);
2376         struct net_device *netdev = adapter->netdev;
2377         struct i40e_hw *hw = &adapter->hw;
2378         struct pci_dev *pdev = adapter->pdev;
2379         int err, bufsz;
2380
2381         switch (adapter->state) {
2382         case __I40EVF_STARTUP:
2383                 /* driver loaded, probe complete */
2384                 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
2385                 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
2386                 err = i40e_set_mac_type(hw);
2387                 if (err) {
2388                         dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
2389                                 err);
2390                         goto err;
2391                 }
2392                 err = i40evf_check_reset_complete(hw);
2393                 if (err) {
2394                         dev_info(&pdev->dev, "Device is still in reset (%d), retrying\n",
2395                                  err);
2396                         goto err;
2397                 }
2398                 hw->aq.num_arq_entries = I40EVF_AQ_LEN;
2399                 hw->aq.num_asq_entries = I40EVF_AQ_LEN;
2400                 hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2401                 hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2402
2403                 err = i40evf_init_adminq(hw);
2404                 if (err) {
2405                         dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
2406                                 err);
2407                         goto err;
2408                 }
2409                 err = i40evf_send_api_ver(adapter);
2410                 if (err) {
2411                         dev_err(&pdev->dev, "Unable to send to PF (%d)\n", err);
2412                         i40evf_shutdown_adminq(hw);
2413                         goto err;
2414                 }
2415                 adapter->state = __I40EVF_INIT_VERSION_CHECK;
2416                 goto restart;
2417         case __I40EVF_INIT_VERSION_CHECK:
2418                 if (!i40evf_asq_done(hw)) {
2419                         dev_err(&pdev->dev, "Admin queue command never completed\n");
2420                         i40evf_shutdown_adminq(hw);
2421                         adapter->state = __I40EVF_STARTUP;
2422                         goto err;
2423                 }
2424
2425                 /* aq msg sent, awaiting reply */
2426                 err = i40evf_verify_api_ver(adapter);
2427                 if (err) {
2428                         if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
2429                                 err = i40evf_send_api_ver(adapter);
2430                         else
2431                                 dev_err(&pdev->dev, "Unsupported PF API version %d.%d, expected %d.%d\n",
2432                                         adapter->pf_version.major,
2433                                         adapter->pf_version.minor,
2434                                         I40E_VIRTCHNL_VERSION_MAJOR,
2435                                         I40E_VIRTCHNL_VERSION_MINOR);
2436                         goto err;
2437                 }
2438                 err = i40evf_send_vf_config_msg(adapter);
2439                 if (err) {
2440                         dev_err(&pdev->dev, "Unable to send config request (%d)\n",
2441                                 err);
2442                         goto err;
2443                 }
2444                 adapter->state = __I40EVF_INIT_GET_RESOURCES;
2445                 goto restart;
2446         case __I40EVF_INIT_GET_RESOURCES:
2447                 /* aq msg sent, awaiting reply */
2448                 if (!adapter->vf_res) {
2449                         bufsz = sizeof(struct i40e_virtchnl_vf_resource) +
2450                                 (I40E_MAX_VF_VSI *
2451                                  sizeof(struct i40e_virtchnl_vsi_resource));
2452                         adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
2453                         if (!adapter->vf_res)
2454                                 goto err;
2455                 }
2456                 err = i40evf_get_vf_config(adapter);
2457                 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK) {
2458                         err = i40evf_send_vf_config_msg(adapter);
2459                         goto err;
2460                 } else if (err == I40E_ERR_PARAM) {
2461                         /* We only get ERR_PARAM if the device is in a very bad
2462                          * state or if we've been disabled for previous bad
2463                          * behavior. Either way, we're done now.
2464                          */
2465                         i40evf_shutdown_adminq(hw);
2466                         dev_err(&pdev->dev, "Unable to get VF config due to PF error condition, not retrying\n");
2467                         return;
2468                 }
2469                 if (err) {
2470                         dev_err(&pdev->dev, "Unable to get VF config (%d)\n",
2471                                 err);
2472                         goto err_alloc;
2473                 }
2474                 adapter->state = __I40EVF_INIT_SW;
2475                 break;
2476         default:
2477                 goto err_alloc;
2478         }
2479         if (i40evf_process_config(adapter))
2480                 goto err_alloc;
2481         adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
2482
2483         adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
2484
2485         netdev->netdev_ops = &i40evf_netdev_ops;
2486         i40evf_set_ethtool_ops(netdev);
2487         netdev->watchdog_timeo = 5 * HZ;
2488
2489         if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
2490                 dev_info(&pdev->dev, "Invalid MAC address %pM, using random\n",
2491                          adapter->hw.mac.addr);
2492                 eth_hw_addr_random(netdev);
2493                 ether_addr_copy(adapter->hw.mac.addr, netdev->dev_addr);
2494         } else {
2495                 adapter->flags |= I40EVF_FLAG_ADDR_SET_BY_PF;
2496                 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
2497                 ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
2498         }
2499
2500         init_timer(&adapter->watchdog_timer);
2501         adapter->watchdog_timer.function = &i40evf_watchdog_timer;
2502         adapter->watchdog_timer.data = (unsigned long)adapter;
2503         mod_timer(&adapter->watchdog_timer, jiffies + 1);
2504
2505         adapter->num_active_queues = min_t(int,
2506                                            adapter->vsi_res->num_queue_pairs,
2507                                            (int)(num_online_cpus()));
2508         adapter->tx_desc_count = I40EVF_DEFAULT_TXD;
2509         adapter->rx_desc_count = I40EVF_DEFAULT_RXD;
2510         err = i40evf_init_interrupt_scheme(adapter);
2511         if (err)
2512                 goto err_sw_init;
2513         i40evf_map_rings_to_vectors(adapter);
2514         if (adapter->vf_res->vf_offload_flags &
2515                     I40E_VIRTCHNL_VF_OFFLOAD_WB_ON_ITR)
2516                 adapter->flags |= I40EVF_FLAG_WB_ON_ITR_CAPABLE;
2517
2518         if (adapter->vf_res->vf_offload_flags &
2519             I40E_VIRTCHNL_VF_OFFLOAD_WB_ON_ITR)
2520                 adapter->flags |= I40EVF_FLAG_WB_ON_ITR_CAPABLE;
2521
2522         err = i40evf_request_misc_irq(adapter);
2523         if (err)
2524                 goto err_sw_init;
2525
2526         netif_carrier_off(netdev);
2527
2528         if (!adapter->netdev_registered) {
2529                 err = register_netdev(netdev);
2530                 if (err)
2531                         goto err_register;
2532         }
2533
2534         adapter->netdev_registered = true;
2535
2536         netif_tx_stop_all_queues(netdev);
2537
2538         dev_info(&pdev->dev, "MAC address: %pM\n", adapter->hw.mac.addr);
2539         if (netdev->features & NETIF_F_GRO)
2540                 dev_info(&pdev->dev, "GRO is enabled\n");
2541
2542         adapter->state = __I40EVF_DOWN;
2543         set_bit(__I40E_DOWN, &adapter->vsi.state);
2544         i40evf_misc_irq_enable(adapter);
2545
2546         if (RSS_AQ(adapter)) {
2547                 adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_RSS;
2548                 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
2549         } else {
2550                 i40evf_init_rss(adapter);
2551         }
2552         return;
2553 restart:
2554         schedule_delayed_work(&adapter->init_task, msecs_to_jiffies(30));
2555         return;
2556
2557 err_register:
2558         i40evf_free_misc_irq(adapter);
2559 err_sw_init:
2560         i40evf_reset_interrupt_capability(adapter);
2561 err_alloc:
2562         kfree(adapter->vf_res);
2563         adapter->vf_res = NULL;
2564 err:
2565         /* Things went into the weeds, so try again later */
2566         if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
2567                 dev_err(&pdev->dev, "Failed to communicate with PF; waiting before retry\n");
2568                 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
2569                 i40evf_shutdown_adminq(hw);
2570                 adapter->state = __I40EVF_STARTUP;
2571                 schedule_delayed_work(&adapter->init_task, HZ * 5);
2572                 return;
2573         }
2574         schedule_delayed_work(&adapter->init_task, HZ);
2575 }
2576
2577 /**
2578  * i40evf_shutdown - Shutdown the device in preparation for a reboot
2579  * @pdev: pci device structure
2580  **/
2581 static void i40evf_shutdown(struct pci_dev *pdev)
2582 {
2583         struct net_device *netdev = pci_get_drvdata(pdev);
2584         struct i40evf_adapter *adapter = netdev_priv(netdev);
2585
2586         netif_device_detach(netdev);
2587
2588         if (netif_running(netdev))
2589                 i40evf_close(netdev);
2590
2591         /* Prevent the watchdog from running. */
2592         adapter->state = __I40EVF_REMOVE;
2593         adapter->aq_required = 0;
2594
2595 #ifdef CONFIG_PM
2596         pci_save_state(pdev);
2597
2598 #endif
2599         pci_disable_device(pdev);
2600 }
2601
2602 /**
2603  * i40evf_probe - Device Initialization Routine
2604  * @pdev: PCI device information struct
2605  * @ent: entry in i40evf_pci_tbl
2606  *
2607  * Returns 0 on success, negative on failure
2608  *
2609  * i40evf_probe initializes an adapter identified by a pci_dev structure.
2610  * The OS initialization, configuring of the adapter private structure,
2611  * and a hardware reset occur.
2612  **/
2613 static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2614 {
2615         struct net_device *netdev;
2616         struct i40evf_adapter *adapter = NULL;
2617         struct i40e_hw *hw = NULL;
2618         int err;
2619
2620         err = pci_enable_device(pdev);
2621         if (err)
2622                 return err;
2623
2624         err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
2625         if (err) {
2626                 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2627                 if (err) {
2628                         dev_err(&pdev->dev,
2629                                 "DMA configuration failed: 0x%x\n", err);
2630                         goto err_dma;
2631                 }
2632         }
2633
2634         err = pci_request_regions(pdev, i40evf_driver_name);
2635         if (err) {
2636                 dev_err(&pdev->dev,
2637                         "pci_request_regions failed 0x%x\n", err);
2638                 goto err_pci_reg;
2639         }
2640
2641         pci_enable_pcie_error_reporting(pdev);
2642
2643         pci_set_master(pdev);
2644
2645         netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter), MAX_QUEUES);
2646         if (!netdev) {
2647                 err = -ENOMEM;
2648                 goto err_alloc_etherdev;
2649         }
2650
2651         SET_NETDEV_DEV(netdev, &pdev->dev);
2652
2653         pci_set_drvdata(pdev, netdev);
2654         adapter = netdev_priv(netdev);
2655
2656         adapter->netdev = netdev;
2657         adapter->pdev = pdev;
2658
2659         hw = &adapter->hw;
2660         hw->back = adapter;
2661
2662         adapter->msg_enable = BIT(DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
2663         adapter->state = __I40EVF_STARTUP;
2664
2665         /* Call save state here because it relies on the adapter struct. */
2666         pci_save_state(pdev);
2667
2668         hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
2669                               pci_resource_len(pdev, 0));
2670         if (!hw->hw_addr) {
2671                 err = -EIO;
2672                 goto err_ioremap;
2673         }
2674         hw->vendor_id = pdev->vendor;
2675         hw->device_id = pdev->device;
2676         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2677         hw->subsystem_vendor_id = pdev->subsystem_vendor;
2678         hw->subsystem_device_id = pdev->subsystem_device;
2679         hw->bus.device = PCI_SLOT(pdev->devfn);
2680         hw->bus.func = PCI_FUNC(pdev->devfn);
2681
2682         /* set up the locks for the AQ, do this only once in probe
2683          * and destroy them only once in remove
2684          */
2685         mutex_init(&hw->aq.asq_mutex);
2686         mutex_init(&hw->aq.arq_mutex);
2687
2688         INIT_LIST_HEAD(&adapter->mac_filter_list);
2689         INIT_LIST_HEAD(&adapter->vlan_filter_list);
2690
2691         INIT_WORK(&adapter->reset_task, i40evf_reset_task);
2692         INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
2693         INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
2694         INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
2695         schedule_delayed_work(&adapter->init_task,
2696                               msecs_to_jiffies(5 * (pdev->devfn & 0x07)));
2697
2698         return 0;
2699
2700 err_ioremap:
2701         free_netdev(netdev);
2702 err_alloc_etherdev:
2703         pci_release_regions(pdev);
2704 err_pci_reg:
2705 err_dma:
2706         pci_disable_device(pdev);
2707         return err;
2708 }
2709
2710 #ifdef CONFIG_PM
2711 /**
2712  * i40evf_suspend - Power management suspend routine
2713  * @pdev: PCI device information struct
2714  * @state: unused
2715  *
2716  * Called when the system (VM) is entering sleep/suspend.
2717  **/
2718 static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
2719 {
2720         struct net_device *netdev = pci_get_drvdata(pdev);
2721         struct i40evf_adapter *adapter = netdev_priv(netdev);
2722         int retval = 0;
2723
2724         netif_device_detach(netdev);
2725
2726         if (netif_running(netdev)) {
2727                 rtnl_lock();
2728                 i40evf_down(adapter);
2729                 rtnl_unlock();
2730         }
2731         i40evf_free_misc_irq(adapter);
2732         i40evf_reset_interrupt_capability(adapter);
2733
2734         retval = pci_save_state(pdev);
2735         if (retval)
2736                 return retval;
2737
2738         pci_disable_device(pdev);
2739
2740         return 0;
2741 }
2742
2743 /**
2744  * i40evf_resume - Power management resume routine
2745  * @pdev: PCI device information struct
2746  *
2747  * Called when the system (VM) is resumed from sleep/suspend.
2748  **/
2749 static int i40evf_resume(struct pci_dev *pdev)
2750 {
2751         struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
2752         struct net_device *netdev = adapter->netdev;
2753         u32 err;
2754
2755         pci_set_power_state(pdev, PCI_D0);
2756         pci_restore_state(pdev);
2757         /* pci_restore_state clears dev->state_saved so call
2758          * pci_save_state to restore it.
2759          */
2760         pci_save_state(pdev);
2761
2762         err = pci_enable_device_mem(pdev);
2763         if (err) {
2764                 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
2765                 return err;
2766         }
2767         pci_set_master(pdev);
2768
2769         rtnl_lock();
2770         err = i40evf_set_interrupt_capability(adapter);
2771         if (err) {
2772                 rtnl_unlock();
2773                 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
2774                 return err;
2775         }
2776         err = i40evf_request_misc_irq(adapter);
2777         rtnl_unlock();
2778         if (err) {
2779                 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
2780                 return err;
2781         }
2782
2783         schedule_work(&adapter->reset_task);
2784
2785         netif_device_attach(netdev);
2786
2787         return err;
2788 }
2789
2790 #endif /* CONFIG_PM */
2791 /**
2792  * i40evf_remove - Device Removal Routine
2793  * @pdev: PCI device information struct
2794  *
2795  * i40evf_remove is called by the PCI subsystem to alert the driver
2796  * that it should release a PCI device.  The could be caused by a
2797  * Hot-Plug event, or because the driver is going to be removed from
2798  * memory.
2799  **/
2800 static void i40evf_remove(struct pci_dev *pdev)
2801 {
2802         struct net_device *netdev = pci_get_drvdata(pdev);
2803         struct i40evf_adapter *adapter = netdev_priv(netdev);
2804         struct i40evf_mac_filter *f, *ftmp;
2805         struct i40e_hw *hw = &adapter->hw;
2806
2807         cancel_delayed_work_sync(&adapter->init_task);
2808         cancel_work_sync(&adapter->reset_task);
2809
2810         if (adapter->netdev_registered) {
2811                 unregister_netdev(netdev);
2812                 adapter->netdev_registered = false;
2813         }
2814
2815         /* Shut down all the garbage mashers on the detention level */
2816         adapter->state = __I40EVF_REMOVE;
2817         adapter->aq_required = 0;
2818         i40evf_request_reset(adapter);
2819         msleep(20);
2820         /* If the FW isn't responding, kick it once, but only once. */
2821         if (!i40evf_asq_done(hw)) {
2822                 i40evf_request_reset(adapter);
2823                 msleep(20);
2824         }
2825
2826         if (adapter->msix_entries) {
2827                 i40evf_misc_irq_disable(adapter);
2828                 i40evf_free_misc_irq(adapter);
2829                 i40evf_reset_interrupt_capability(adapter);
2830                 i40evf_free_q_vectors(adapter);
2831         }
2832
2833         if (adapter->watchdog_timer.function)
2834                 del_timer_sync(&adapter->watchdog_timer);
2835
2836         flush_scheduled_work();
2837
2838         /* Clear user configurations for RSS */
2839         i40evf_clear_rss_config_user(&adapter->vsi);
2840
2841         if (hw->aq.asq.count)
2842                 i40evf_shutdown_adminq(hw);
2843
2844         /* destroy the locks only once, here */
2845         mutex_destroy(&hw->aq.arq_mutex);
2846         mutex_destroy(&hw->aq.asq_mutex);
2847
2848         iounmap(hw->hw_addr);
2849         pci_release_regions(pdev);
2850
2851         i40evf_free_all_tx_resources(adapter);
2852         i40evf_free_all_rx_resources(adapter);
2853         i40evf_free_queues(adapter);
2854         kfree(adapter->vf_res);
2855         /* If we got removed before an up/down sequence, we've got a filter
2856          * hanging out there that we need to get rid of.
2857          */
2858         list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
2859                 list_del(&f->list);
2860                 kfree(f);
2861         }
2862         list_for_each_entry_safe(f, ftmp, &adapter->vlan_filter_list, list) {
2863                 list_del(&f->list);
2864                 kfree(f);
2865         }
2866
2867         free_netdev(netdev);
2868
2869         pci_disable_pcie_error_reporting(pdev);
2870
2871         pci_disable_device(pdev);
2872 }
2873
2874 static struct pci_driver i40evf_driver = {
2875         .name     = i40evf_driver_name,
2876         .id_table = i40evf_pci_tbl,
2877         .probe    = i40evf_probe,
2878         .remove   = i40evf_remove,
2879 #ifdef CONFIG_PM
2880         .suspend  = i40evf_suspend,
2881         .resume   = i40evf_resume,
2882 #endif
2883         .shutdown = i40evf_shutdown,
2884 };
2885
2886 /**
2887  * i40e_init_module - Driver Registration Routine
2888  *
2889  * i40e_init_module is the first routine called when the driver is
2890  * loaded. All it does is register with the PCI subsystem.
2891  **/
2892 static int __init i40evf_init_module(void)
2893 {
2894         int ret;
2895
2896         pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
2897                 i40evf_driver_version);
2898
2899         pr_info("%s\n", i40evf_copyright);
2900
2901         i40evf_wq = create_singlethread_workqueue(i40evf_driver_name);
2902         if (!i40evf_wq) {
2903                 pr_err("%s: Failed to create workqueue\n", i40evf_driver_name);
2904                 return -ENOMEM;
2905         }
2906         ret = pci_register_driver(&i40evf_driver);
2907         return ret;
2908 }
2909
2910 module_init(i40evf_init_module);
2911
2912 /**
2913  * i40e_exit_module - Driver Exit Cleanup Routine
2914  *
2915  * i40e_exit_module is called just before the driver is removed
2916  * from memory.
2917  **/
2918 static void __exit i40evf_exit_module(void)
2919 {
2920         pci_unregister_driver(&i40evf_driver);
2921         destroy_workqueue(i40evf_wq);
2922 }
2923
2924 module_exit(i40evf_exit_module);
2925
2926 /* i40evf_main.c */