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_VERSION "1.3.13"
  38 const char i40evf_driver_version[] = DRV_VERSION;
  39 static const char i40evf_copyright[] =
  40         "Copyright (c) 2013 - 2015 Intel Corporation.";
  41
  42 /* i40evf_pci_tbl - PCI Device ID Table
  43  *
  44  * Wildcard entries (PCI_ANY_ID) should come last
  45  * Last entry must be all 0s
  46  *
  47  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  48  *   Class, Class Mask, private data (not used) }
  49  */
  50 static const struct pci_device_id i40evf_pci_tbl[] = {
  51         {PCI_VDEVICE(INTEL, I40E_DEV_ID_VF), 0},
  52         {PCI_VDEVICE(INTEL, I40E_DEV_ID_X722_VF), 0},
  53         /* required last entry */
  54         {0, }
  55 };
  56
  57 MODULE_DEVICE_TABLE(pci, i40evf_pci_tbl);
  58
  59 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
  60 MODULE_DESCRIPTION("Intel(R) XL710 X710 Virtual Function Network Driver");
  61 MODULE_LICENSE("GPL");
  62 MODULE_VERSION(DRV_VERSION);
  63
  64 /**
  65  * i40evf_allocate_dma_mem_d - OS specific memory alloc for shared code
  66  * @hw:   pointer to the HW structure
  67  * @mem:  ptr to mem struct to fill out
  68  * @size: size of memory requested
  69  * @alignment: what to align the allocation to
  70  **/
  71 i40e_status i40evf_allocate_dma_mem_d(struct i40e_hw *hw,
  72                                       struct i40e_dma_mem *mem,
  73                                       u64 size, u32 alignment)
  74 {
  75         struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
  76
  77         if (!mem)
  78                 return I40E_ERR_PARAM;
  79
  80         mem->size = ALIGN(size, alignment);
  81         mem->va = dma_alloc_coherent(&adapter->pdev->dev, mem->size,
  82                                      (dma_addr_t *)&mem->pa, GFP_KERNEL);
  83         if (mem->va)
  84                 return 0;
  85         else
  86                 return I40E_ERR_NO_MEMORY;
  87 }
  88
  89 /**
  90  * i40evf_free_dma_mem_d - OS specific memory free for shared code
  91  * @hw:   pointer to the HW structure
  92  * @mem:  ptr to mem struct to free
  93  **/
  94 i40e_status i40evf_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem)
  95 {
  96         struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
  97
  98         if (!mem || !mem->va)
  99                 return I40E_ERR_PARAM;
 100         dma_free_coherent(&adapter->pdev->dev, mem->size,
 101                           mem->va, (dma_addr_t)mem->pa);
 102         return 0;
 103 }
 104
 105 /**
 106  * i40evf_allocate_virt_mem_d - OS specific memory alloc for shared code
 107  * @hw:   pointer to the HW structure
 108  * @mem:  ptr to mem struct to fill out
 109  * @size: size of memory requested
 110  **/
 111 i40e_status i40evf_allocate_virt_mem_d(struct i40e_hw *hw,
 112                                        struct i40e_virt_mem *mem, u32 size)
 113 {
 114         if (!mem)
 115                 return I40E_ERR_PARAM;
 116
 117         mem->size = size;
 118         mem->va = kzalloc(size, GFP_KERNEL);
 119
 120         if (mem->va)
 121                 return 0;
 122         else
 123                 return I40E_ERR_NO_MEMORY;
 124 }
 125
 126 /**
 127  * i40evf_free_virt_mem_d - OS specific memory free for shared code
 128  * @hw:   pointer to the HW structure
 129  * @mem:  ptr to mem struct to free
 130  **/
 131 i40e_status i40evf_free_virt_mem_d(struct i40e_hw *hw,
 132                                    struct i40e_virt_mem *mem)
 133 {
 134         if (!mem)
 135                 return I40E_ERR_PARAM;
 136
 137         /* it's ok to kfree a NULL pointer */
 138         kfree(mem->va);
 139
 140         return 0;
 141 }
 142
 143 /**
 144  * i40evf_debug_d - OS dependent version of debug printing
 145  * @hw:  pointer to the HW structure
 146  * @mask: debug level mask
 147  * @fmt_str: printf-type format description
 148  **/
 149 void i40evf_debug_d(void *hw, u32 mask, char *fmt_str, ...)
 150 {
 151         char buf[512];
 152         va_list argptr;
 153
 154         if (!(mask & ((struct i40e_hw *)hw)->debug_mask))
 155                 return;
 156
 157         va_start(argptr, fmt_str);
 158         vsnprintf(buf, sizeof(buf), fmt_str, argptr);
 159         va_end(argptr);
 160
 161         /* the debug string is already formatted with a newline */
 162         pr_info("%s", buf);
 163 }
 164
 165 /**
 166  * i40evf_tx_timeout - Respond to a Tx Hang
 167  * @netdev: network interface device structure
 168  **/
 169 static void i40evf_tx_timeout(struct net_device *netdev)
 170 {
 171         struct i40evf_adapter *adapter = netdev_priv(netdev);
 172
 173         adapter->tx_timeout_count++;
 174         if (!(adapter->flags & (I40EVF_FLAG_RESET_PENDING |
 175                                 I40EVF_FLAG_RESET_NEEDED))) {
 176                 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
 177                 schedule_work(&adapter->reset_task);
 178         }
 179 }
 180
 181 /**
 182  * i40evf_misc_irq_disable - Mask off interrupt generation on the NIC
 183  * @adapter: board private structure
 184  **/
 185 static void i40evf_misc_irq_disable(struct i40evf_adapter *adapter)
 186 {
 187         struct i40e_hw *hw = &adapter->hw;
 188
 189         wr32(hw, I40E_VFINT_DYN_CTL01, 0);
 190
 191         /* read flush */
 192         rd32(hw, I40E_VFGEN_RSTAT);
 193
 194         synchronize_irq(adapter->msix_entries[0].vector);
 195 }
 196
 197 /**
 198  * i40evf_misc_irq_enable - Enable default interrupt generation settings
 199  * @adapter: board private structure
 200  **/
 201 static void i40evf_misc_irq_enable(struct i40evf_adapter *adapter)
 202 {
 203         struct i40e_hw *hw = &adapter->hw;
 204
 205         wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK |
 206                                        I40E_VFINT_DYN_CTL01_ITR_INDX_MASK);
 207         wr32(hw, I40E_VFINT_ICR0_ENA1, I40E_VFINT_ICR0_ENA1_ADMINQ_MASK);
 208
 209         /* read flush */
 210         rd32(hw, I40E_VFGEN_RSTAT);
 211 }
 212
 213 /**
 214  * i40evf_irq_disable - Mask off interrupt generation on the NIC
 215  * @adapter: board private structure
 216  **/
 217 static void i40evf_irq_disable(struct i40evf_adapter *adapter)
 218 {
 219         int i;
 220         struct i40e_hw *hw = &adapter->hw;
 221
 222         if (!adapter->msix_entries)
 223                 return;
 224
 225         for (i = 1; i < adapter->num_msix_vectors; i++) {
 226                 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), 0);
 227                 synchronize_irq(adapter->msix_entries[i].vector);
 228         }
 229         /* read flush */
 230         rd32(hw, I40E_VFGEN_RSTAT);
 231 }
 232
 233 /**
 234  * i40evf_irq_enable_queues - Enable interrupt for specified queues
 235  * @adapter: board private structure
 236  * @mask: bitmap of queues to enable
 237  **/
 238 void i40evf_irq_enable_queues(struct i40evf_adapter *adapter, u32 mask)
 239 {
 240         struct i40e_hw *hw = &adapter->hw;
 241         int i;
 242
 243         for (i = 1; i < adapter->num_msix_vectors; i++) {
 244                 if (mask & BIT(i - 1)) {
 245                         wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1),
 246                              I40E_VFINT_DYN_CTLN1_INTENA_MASK |
 247                              I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
 248                              I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK);
 249                 }
 250         }
 251 }
 252
 253 /**
 254  * i40evf_fire_sw_int - Generate SW interrupt for specified vectors
 255  * @adapter: board private structure
 256  * @mask: bitmap of vectors to trigger
 257  **/
 258 static void i40evf_fire_sw_int(struct i40evf_adapter *adapter, u32 mask)
 259 {
 260         struct i40e_hw *hw = &adapter->hw;
 261         int i;
 262         uint32_t dyn_ctl;
 263
 264         if (mask & 1) {
 265                 dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTL01);
 266                 dyn_ctl |= I40E_VFINT_DYN_CTLN1_SWINT_TRIG_MASK |
 267                            I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
 268                            I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK;
 269                 wr32(hw, I40E_VFINT_DYN_CTL01, dyn_ctl);
 270         }
 271         for (i = 1; i < adapter->num_msix_vectors; i++) {
 272                 if (mask & BIT(i)) {
 273                         dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTLN1(i - 1));
 274                         dyn_ctl |= I40E_VFINT_DYN_CTLN1_SWINT_TRIG_MASK |
 275                                    I40E_VFINT_DYN_CTLN1_ITR_INDX_MASK |
 276                                    I40E_VFINT_DYN_CTLN1_CLEARPBA_MASK;
 277                         wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), dyn_ctl);
 278                 }
 279         }
 280 }
 281
 282 /**
 283  * i40evf_irq_enable - Enable default interrupt generation settings
 284  * @adapter: board private structure
 285  **/
 286 void i40evf_irq_enable(struct i40evf_adapter *adapter, bool flush)
 287 {
 288         struct i40e_hw *hw = &adapter->hw;
 289
 290         i40evf_misc_irq_enable(adapter);
 291         i40evf_irq_enable_queues(adapter, ~0);
 292
 293         if (flush)
 294                 rd32(hw, I40E_VFGEN_RSTAT);
 295 }
 296
 297 /**
 298  * i40evf_msix_aq - Interrupt handler for vector 0
 299  * @irq: interrupt number
 300  * @data: pointer to netdev
 301  **/
 302 static irqreturn_t i40evf_msix_aq(int irq, void *data)
 303 {
 304         struct net_device *netdev = data;
 305         struct i40evf_adapter *adapter = netdev_priv(netdev);
 306         struct i40e_hw *hw = &adapter->hw;
 307         u32 val;
 308         u32 ena_mask;
 309
 310         /* handle non-queue interrupts */
 311         val = rd32(hw, I40E_VFINT_ICR01);
 312         ena_mask = rd32(hw, I40E_VFINT_ICR0_ENA1);
 313
 314
 315         val = rd32(hw, I40E_VFINT_DYN_CTL01);
 316         val = val | I40E_VFINT_DYN_CTL01_CLEARPBA_MASK;
 317         wr32(hw, I40E_VFINT_DYN_CTL01, val);
 318
 319         /* schedule work on the private workqueue */
 320         schedule_work(&adapter->adminq_task);
 321
 322         return IRQ_HANDLED;
 323 }
 324
 325 /**
 326  * i40evf_msix_clean_rings - MSIX mode Interrupt Handler
 327  * @irq: interrupt number
 328  * @data: pointer to a q_vector
 329  **/
 330 static irqreturn_t i40evf_msix_clean_rings(int irq, void *data)
 331 {
 332         struct i40e_q_vector *q_vector = data;
 333
 334         if (!q_vector->tx.ring && !q_vector->rx.ring)
 335                 return IRQ_HANDLED;
 336
 337         napi_schedule(&q_vector->napi);
 338
 339         return IRQ_HANDLED;
 340 }
 341
 342 /**
 343  * i40evf_map_vector_to_rxq - associate irqs with rx queues
 344  * @adapter: board private structure
 345  * @v_idx: interrupt number
 346  * @r_idx: queue number
 347  **/
 348 static void
 349 i40evf_map_vector_to_rxq(struct i40evf_adapter *adapter, int v_idx, int r_idx)
 350 {
 351         struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
 352         struct i40e_ring *rx_ring = adapter->rx_rings[r_idx];
 353
 354         rx_ring->q_vector = q_vector;
 355         rx_ring->next = q_vector->rx.ring;
 356         rx_ring->vsi = &adapter->vsi;
 357         q_vector->rx.ring = rx_ring;
 358         q_vector->rx.count++;
 359         q_vector->rx.latency_range = I40E_LOW_LATENCY;
 360 }
 361
 362 /**
 363  * i40evf_map_vector_to_txq - associate irqs with tx queues
 364  * @adapter: board private structure
 365  * @v_idx: interrupt number
 366  * @t_idx: queue number
 367  **/
 368 static void
 369 i40evf_map_vector_to_txq(struct i40evf_adapter *adapter, int v_idx, int t_idx)
 370 {
 371         struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
 372         struct i40e_ring *tx_ring = adapter->tx_rings[t_idx];
 373
 374         tx_ring->q_vector = q_vector;
 375         tx_ring->next = q_vector->tx.ring;
 376         tx_ring->vsi = &adapter->vsi;
 377         q_vector->tx.ring = tx_ring;
 378         q_vector->tx.count++;
 379         q_vector->tx.latency_range = I40E_LOW_LATENCY;
 380         q_vector->num_ringpairs++;
 381         q_vector->ring_mask |= BIT(t_idx);
 382 }
 383
 384 /**
 385  * i40evf_map_rings_to_vectors - Maps descriptor rings to vectors
 386  * @adapter: board private structure to initialize
 387  *
 388  * This function maps descriptor rings to the queue-specific vectors
 389  * we were allotted through the MSI-X enabling code.  Ideally, we'd have
 390  * one vector per ring/queue, but on a constrained vector budget, we
 391  * group the rings as "efficiently" as possible.  You would add new
 392  * mapping configurations in here.
 393  **/
 394 static int i40evf_map_rings_to_vectors(struct i40evf_adapter *adapter)
 395 {
 396         int q_vectors;
 397         int v_start = 0;
 398         int rxr_idx = 0, txr_idx = 0;
 399         int rxr_remaining = adapter->num_active_queues;
 400         int txr_remaining = adapter->num_active_queues;
 401         int i, j;
 402         int rqpv, tqpv;
 403         int err = 0;
 404
 405         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 406
 407         /* The ideal configuration...
 408          * We have enough vectors to map one per queue.
 409          */
 410         if (q_vectors >= (rxr_remaining * 2)) {
 411                 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
 412                         i40evf_map_vector_to_rxq(adapter, v_start, rxr_idx);
 413
 414                 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
 415                         i40evf_map_vector_to_txq(adapter, v_start, txr_idx);
 416                 goto out;
 417         }
 418
 419         /* If we don't have enough vectors for a 1-to-1
 420          * mapping, we'll have to group them so there are
 421          * multiple queues per vector.
 422          * Re-adjusting *qpv takes care of the remainder.
 423          */
 424         for (i = v_start; i < q_vectors; i++) {
 425                 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
 426                 for (j = 0; j < rqpv; j++) {
 427                         i40evf_map_vector_to_rxq(adapter, i, rxr_idx);
 428                         rxr_idx++;
 429                         rxr_remaining--;
 430                 }
 431         }
 432         for (i = v_start; i < q_vectors; i++) {
 433                 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
 434                 for (j = 0; j < tqpv; j++) {
 435                         i40evf_map_vector_to_txq(adapter, i, txr_idx);
 436                         txr_idx++;
 437                         txr_remaining--;
 438                 }
 439         }
 440
 441 out:
 442         adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
 443
 444         return err;
 445 }
 446
 447 /**
 448  * i40evf_request_traffic_irqs - Initialize MSI-X interrupts
 449  * @adapter: board private structure
 450  *
 451  * Allocates MSI-X vectors for tx and rx handling, and requests
 452  * interrupts from the kernel.
 453  **/
 454 static int
 455 i40evf_request_traffic_irqs(struct i40evf_adapter *adapter, char *basename)
 456 {
 457         int vector, err, q_vectors;
 458         int rx_int_idx = 0, tx_int_idx = 0;
 459
 460         i40evf_irq_disable(adapter);
 461         /* Decrement for Other and TCP Timer vectors */
 462         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 463
 464         for (vector = 0; vector < q_vectors; vector++) {
 465                 struct i40e_q_vector *q_vector = adapter->q_vector[vector];
 466
 467                 if (q_vector->tx.ring && q_vector->rx.ring) {
 468                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 469                                  "i40evf-%s-%s-%d", basename,
 470                                  "TxRx", rx_int_idx++);
 471                         tx_int_idx++;
 472                 } else if (q_vector->rx.ring) {
 473                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 474                                  "i40evf-%s-%s-%d", basename,
 475                                  "rx", rx_int_idx++);
 476                 } else if (q_vector->tx.ring) {
 477                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 478                                  "i40evf-%s-%s-%d", basename,
 479                                  "tx", tx_int_idx++);
 480                 } else {
 481                         /* skip this unused q_vector */
 482                         continue;
 483                 }
 484                 err = request_irq(
 485                         adapter->msix_entries[vector + NONQ_VECS].vector,
 486                         i40evf_msix_clean_rings,
 487                         0,
 488                         q_vector->name,
 489                         q_vector);
 490                 if (err) {
 491                         dev_info(&adapter->pdev->dev,
 492                                  "Request_irq failed, error: %d\n", err);
 493                         goto free_queue_irqs;
 494                 }
 495                 /* assign the mask for this irq */
 496                 irq_set_affinity_hint(
 497                         adapter->msix_entries[vector + NONQ_VECS].vector,
 498                         q_vector->affinity_mask);
 499         }
 500
 501         return 0;
 502
 503 free_queue_irqs:
 504         while (vector) {
 505                 vector--;
 506                 irq_set_affinity_hint(
 507                         adapter->msix_entries[vector + NONQ_VECS].vector,
 508                         NULL);
 509                 free_irq(adapter->msix_entries[vector + NONQ_VECS].vector,
 510                          adapter->q_vector[vector]);
 511         }
 512         return err;
 513 }
 514
 515 /**
 516  * i40evf_request_misc_irq - Initialize MSI-X interrupts
 517  * @adapter: board private structure
 518  *
 519  * Allocates MSI-X vector 0 and requests interrupts from the kernel. This
 520  * vector is only for the admin queue, and stays active even when the netdev
 521  * is closed.
 522  **/
 523 static int i40evf_request_misc_irq(struct i40evf_adapter *adapter)
 524 {
 525         struct net_device *netdev = adapter->netdev;
 526         int err;
 527
 528         snprintf(adapter->misc_vector_name,
 529                  sizeof(adapter->misc_vector_name) - 1, "i40evf-%s:mbx",
 530                  dev_name(&adapter->pdev->dev));
 531         err = request_irq(adapter->msix_entries[0].vector,
 532                           &i40evf_msix_aq, 0,
 533                           adapter->misc_vector_name, netdev);
 534         if (err) {
 535                 dev_err(&adapter->pdev->dev,
 536                         "request_irq for %s failed: %d\n",
 537                         adapter->misc_vector_name, err);
 538                 free_irq(adapter->msix_entries[0].vector, netdev);
 539         }
 540         return err;
 541 }
 542
 543 /**
 544  * i40evf_free_traffic_irqs - Free MSI-X interrupts
 545  * @adapter: board private structure
 546  *
 547  * Frees all MSI-X vectors other than 0.
 548  **/
 549 static void i40evf_free_traffic_irqs(struct i40evf_adapter *adapter)
 550 {
 551         int i;
 552         int q_vectors;
 553
 554         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 555
 556         for (i = 0; i < q_vectors; i++) {
 557                 irq_set_affinity_hint(adapter->msix_entries[i+1].vector,
 558                                       NULL);
 559                 free_irq(adapter->msix_entries[i+1].vector,
 560                          adapter->q_vector[i]);
 561         }
 562 }
 563
 564 /**
 565  * i40evf_free_misc_irq - Free MSI-X miscellaneous vector
 566  * @adapter: board private structure
 567  *
 568  * Frees MSI-X vector 0.
 569  **/
 570 static void i40evf_free_misc_irq(struct i40evf_adapter *adapter)
 571 {
 572         struct net_device *netdev = adapter->netdev;
 573
 574         free_irq(adapter->msix_entries[0].vector, netdev);
 575 }
 576
 577 /**
 578  * i40evf_configure_tx - Configure Transmit Unit after Reset
 579  * @adapter: board private structure
 580  *
 581  * Configure the Tx unit of the MAC after a reset.
 582  **/
 583 static void i40evf_configure_tx(struct i40evf_adapter *adapter)
 584 {
 585         struct i40e_hw *hw = &adapter->hw;
 586         int i;
 587
 588         for (i = 0; i < adapter->num_active_queues; i++)
 589                 adapter->tx_rings[i]->tail = hw->hw_addr + I40E_QTX_TAIL1(i);
 590 }
 591
 592 /**
 593  * i40evf_configure_rx - Configure Receive Unit after Reset
 594  * @adapter: board private structure
 595  *
 596  * Configure the Rx unit of the MAC after a reset.
 597  **/
 598 static void i40evf_configure_rx(struct i40evf_adapter *adapter)
 599 {
 600         struct i40e_hw *hw = &adapter->hw;
 601         struct net_device *netdev = adapter->netdev;
 602         int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
 603         int i;
 604         int rx_buf_len;
 605
 606
 607         adapter->flags &= ~I40EVF_FLAG_RX_PS_CAPABLE;
 608         adapter->flags |= I40EVF_FLAG_RX_1BUF_CAPABLE;
 609
 610         /* Decide whether to use packet split mode or not */
 611         if (netdev->mtu > ETH_DATA_LEN) {
 612                 if (adapter->flags & I40EVF_FLAG_RX_PS_CAPABLE)
 613                         adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
 614                 else
 615                         adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
 616         } else {
 617                 if (adapter->flags & I40EVF_FLAG_RX_1BUF_CAPABLE)
 618                         adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
 619                 else
 620                         adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
 621         }
 622
 623         /* Set the RX buffer length according to the mode */
 624         if (adapter->flags & I40EVF_FLAG_RX_PS_ENABLED) {
 625                 rx_buf_len = I40E_RX_HDR_SIZE;
 626         } else {
 627                 if (netdev->mtu <= ETH_DATA_LEN)
 628                         rx_buf_len = I40EVF_RXBUFFER_2048;
 629                 else
 630                         rx_buf_len = ALIGN(max_frame, 1024);
 631         }
 632
 633         for (i = 0; i < adapter->num_active_queues; i++) {
 634                 adapter->rx_rings[i]->tail = hw->hw_addr + I40E_QRX_TAIL1(i);
 635                 adapter->rx_rings[i]->rx_buf_len = rx_buf_len;
 636         }
 637 }
 638
 639 /**
 640  * i40evf_find_vlan - Search filter list for specific vlan filter
 641  * @adapter: board private structure
 642  * @vlan: vlan tag
 643  *
 644  * Returns ptr to the filter object or NULL
 645  **/
 646 static struct
 647 i40evf_vlan_filter *i40evf_find_vlan(struct i40evf_adapter *adapter, u16 vlan)
 648 {
 649         struct i40evf_vlan_filter *f;
 650
 651         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
 652                 if (vlan == f->vlan)
 653                         return f;
 654         }
 655         return NULL;
 656 }
 657
 658 /**
 659  * i40evf_add_vlan - Add a vlan filter to the list
 660  * @adapter: board private structure
 661  * @vlan: VLAN tag
 662  *
 663  * Returns ptr to the filter object or NULL when no memory available.
 664  **/
 665 static struct
 666 i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan)
 667 {
 668         struct i40evf_vlan_filter *f = NULL;
 669         int count = 50;
 670
 671         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 672                                 &adapter->crit_section)) {
 673                 udelay(1);
 674                 if (--count == 0)
 675                         goto out;
 676         }
 677
 678         f = i40evf_find_vlan(adapter, vlan);
 679         if (!f) {
 680                 f = kzalloc(sizeof(*f), GFP_ATOMIC);
 681                 if (!f)
 682                         goto clearout;
 683
 684                 f->vlan = vlan;
 685
 686                 INIT_LIST_HEAD(&f->list);
 687                 list_add(&f->list, &adapter->vlan_filter_list);
 688                 f->add = true;
 689                 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
 690         }
 691
 692 clearout:
 693         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 694 out:
 695         return f;
 696 }
 697
 698 /**
 699  * i40evf_del_vlan - Remove a vlan filter from the list
 700  * @adapter: board private structure
 701  * @vlan: VLAN tag
 702  **/
 703 static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan)
 704 {
 705         struct i40evf_vlan_filter *f;
 706         int count = 50;
 707
 708         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 709                                 &adapter->crit_section)) {
 710                 udelay(1);
 711                 if (--count == 0)
 712                         return;
 713         }
 714
 715         f = i40evf_find_vlan(adapter, vlan);
 716         if (f) {
 717                 f->remove = true;
 718                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
 719         }
 720         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 721 }
 722
 723 /**
 724  * i40evf_vlan_rx_add_vid - Add a VLAN filter to a device
 725  * @netdev: network device struct
 726  * @vid: VLAN tag
 727  **/
 728 static int i40evf_vlan_rx_add_vid(struct net_device *netdev,
 729                                   __always_unused __be16 proto, u16 vid)
 730 {
 731         struct i40evf_adapter *adapter = netdev_priv(netdev);
 732
 733         if (i40evf_add_vlan(adapter, vid) == NULL)
 734                 return -ENOMEM;
 735         return 0;
 736 }
 737
 738 /**
 739  * i40evf_vlan_rx_kill_vid - Remove a VLAN filter from a device
 740  * @netdev: network device struct
 741  * @vid: VLAN tag
 742  **/
 743 static int i40evf_vlan_rx_kill_vid(struct net_device *netdev,
 744                                    __always_unused __be16 proto, u16 vid)
 745 {
 746         struct i40evf_adapter *adapter = netdev_priv(netdev);
 747
 748         i40evf_del_vlan(adapter, vid);
 749         return 0;
 750 }
 751
 752 /**
 753  * i40evf_find_filter - Search filter list for specific mac filter
 754  * @adapter: board private structure
 755  * @macaddr: the MAC address
 756  *
 757  * Returns ptr to the filter object or NULL
 758  **/
 759 static struct
 760 i40evf_mac_filter *i40evf_find_filter(struct i40evf_adapter *adapter,
 761                                       u8 *macaddr)
 762 {
 763         struct i40evf_mac_filter *f;
 764
 765         if (!macaddr)
 766                 return NULL;
 767
 768         list_for_each_entry(f, &adapter->mac_filter_list, list) {
 769                 if (ether_addr_equal(macaddr, f->macaddr))
 770                         return f;
 771         }
 772         return NULL;
 773 }
 774
 775 /**
 776  * i40e_add_filter - Add a mac filter to the filter list
 777  * @adapter: board private structure
 778  * @macaddr: the MAC address
 779  *
 780  * Returns ptr to the filter object or NULL when no memory available.
 781  **/
 782 static struct
 783 i40evf_mac_filter *i40evf_add_filter(struct i40evf_adapter *adapter,
 784                                      u8 *macaddr)
 785 {
 786         struct i40evf_mac_filter *f;
 787         int count = 50;
 788
 789         if (!macaddr)
 790                 return NULL;
 791
 792         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 793                                 &adapter->crit_section)) {
 794                 udelay(1);
 795                 if (--count == 0)
 796                         return NULL;
 797         }
 798
 799         f = i40evf_find_filter(adapter, macaddr);
 800         if (!f) {
 801                 f = kzalloc(sizeof(*f), GFP_ATOMIC);
 802                 if (!f) {
 803                         clear_bit(__I40EVF_IN_CRITICAL_TASK,
 804                                   &adapter->crit_section);
 805                         return NULL;
 806                 }
 807
 808                 ether_addr_copy(f->macaddr, macaddr);
 809
 810                 list_add(&f->list, &adapter->mac_filter_list);
 811                 f->add = true;
 812                 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
 813         }
 814
 815         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 816         return f;
 817 }
 818
 819 /**
 820  * i40evf_set_mac - NDO callback to set port mac address
 821  * @netdev: network interface device structure
 822  * @p: pointer to an address structure
 823  *
 824  * Returns 0 on success, negative on failure
 825  **/
 826 static int i40evf_set_mac(struct net_device *netdev, void *p)
 827 {
 828         struct i40evf_adapter *adapter = netdev_priv(netdev);
 829         struct i40e_hw *hw = &adapter->hw;
 830         struct i40evf_mac_filter *f;
 831         struct sockaddr *addr = p;
 832
 833         if (!is_valid_ether_addr(addr->sa_data))
 834                 return -EADDRNOTAVAIL;
 835
 836         if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
 837                 return 0;
 838
 839         f = i40evf_add_filter(adapter, addr->sa_data);
 840         if (f) {
 841                 ether_addr_copy(hw->mac.addr, addr->sa_data);
 842                 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
 843         }
 844
 845         return (f == NULL) ? -ENOMEM : 0;
 846 }
 847
 848 /**
 849  * i40evf_set_rx_mode - NDO callback to set the netdev filters
 850  * @netdev: network interface device structure
 851  **/
 852 static void i40evf_set_rx_mode(struct net_device *netdev)
 853 {
 854         struct i40evf_adapter *adapter = netdev_priv(netdev);
 855         struct i40evf_mac_filter *f, *ftmp;
 856         struct netdev_hw_addr *uca;
 857         struct netdev_hw_addr *mca;
 858         struct netdev_hw_addr *ha;
 859         int count = 50;
 860
 861         /* add addr if not already in the filter list */
 862         netdev_for_each_uc_addr(uca, netdev) {
 863                 i40evf_add_filter(adapter, uca->addr);
 864         }
 865         netdev_for_each_mc_addr(mca, netdev) {
 866                 i40evf_add_filter(adapter, mca->addr);
 867         }
 868
 869         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 870                                 &adapter->crit_section)) {
 871                 udelay(1);
 872                 if (--count == 0) {
 873                         dev_err(&adapter->pdev->dev,
 874                                 "Failed to get lock in %s\n", __func__);
 875                         return;
 876                 }
 877         }
 878         /* remove filter if not in netdev list */
 879         list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
 880                 netdev_for_each_mc_addr(mca, netdev)
 881                         if (ether_addr_equal(mca->addr, f->macaddr))
 882                                 goto bottom_of_search_loop;
 883
 884                 netdev_for_each_uc_addr(uca, netdev)
 885                         if (ether_addr_equal(uca->addr, f->macaddr))
 886                                 goto bottom_of_search_loop;
 887
 888                 for_each_dev_addr(netdev, ha)
 889                         if (ether_addr_equal(ha->addr, f->macaddr))
 890                                 goto bottom_of_search_loop;
 891
 892                 if (ether_addr_equal(f->macaddr, adapter->hw.mac.addr))
 893                         goto bottom_of_search_loop;
 894
 895                 /* f->macaddr wasn't found in uc, mc, or ha list so delete it */
 896                 f->remove = true;
 897                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
 898
 899 bottom_of_search_loop:
 900                 continue;
 901         }
 902         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 903 }
 904
 905 /**
 906  * i40evf_napi_enable_all - enable NAPI on all queue vectors
 907  * @adapter: board private structure
 908  **/
 909 static void i40evf_napi_enable_all(struct i40evf_adapter *adapter)
 910 {
 911         int q_idx;
 912         struct i40e_q_vector *q_vector;
 913         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 914
 915         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
 916                 struct napi_struct *napi;
 917
 918                 q_vector = adapter->q_vector[q_idx];
 919                 napi = &q_vector->napi;
 920                 napi_enable(napi);
 921         }
 922 }
 923
 924 /**
 925  * i40evf_napi_disable_all - disable NAPI on all queue vectors
 926  * @adapter: board private structure
 927  **/
 928 static void i40evf_napi_disable_all(struct i40evf_adapter *adapter)
 929 {
 930         int q_idx;
 931         struct i40e_q_vector *q_vector;
 932         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 933
 934         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
 935                 q_vector = adapter->q_vector[q_idx];
 936                 napi_disable(&q_vector->napi);
 937         }
 938 }
 939
 940 /**
 941  * i40evf_configure - set up transmit and receive data structures
 942  * @adapter: board private structure
 943  **/
 944 static void i40evf_configure(struct i40evf_adapter *adapter)
 945 {
 946         struct net_device *netdev = adapter->netdev;
 947         int i;
 948
 949         i40evf_set_rx_mode(netdev);
 950
 951         i40evf_configure_tx(adapter);
 952         i40evf_configure_rx(adapter);
 953         adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
 954
 955         for (i = 0; i < adapter->num_active_queues; i++) {
 956                 struct i40e_ring *ring = adapter->rx_rings[i];
 957
 958                 i40evf_alloc_rx_buffers_1buf(ring, ring->count);
 959                 ring->next_to_use = ring->count - 1;
 960                 writel(ring->next_to_use, ring->tail);
 961         }
 962 }
 963
 964 /**
 965  * i40evf_up_complete - Finish the last steps of bringing up a connection
 966  * @adapter: board private structure
 967  **/
 968 static int i40evf_up_complete(struct i40evf_adapter *adapter)
 969 {
 970         adapter->state = __I40EVF_RUNNING;
 971         clear_bit(__I40E_DOWN, &adapter->vsi.state);
 972
 973         i40evf_napi_enable_all(adapter);
 974
 975         adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES;
 976         mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
 977         return 0;
 978 }
 979
 980 /**
 981  * i40e_down - Shutdown the connection processing
 982  * @adapter: board private structure
 983  **/
 984 void i40evf_down(struct i40evf_adapter *adapter)
 985 {
 986         struct net_device *netdev = adapter->netdev;
 987         struct i40evf_mac_filter *f;
 988
 989         if (adapter->state == __I40EVF_DOWN)
 990                 return;
 991
 992         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 993                                 &adapter->crit_section))
 994                 usleep_range(500, 1000);
 995
 996         netif_carrier_off(netdev);
 997         netif_tx_disable(netdev);
 998         i40evf_napi_disable_all(adapter);
 999         i40evf_irq_disable(adapter);
1000
1001         /* remove all MAC filters */
1002         list_for_each_entry(f, &adapter->mac_filter_list, list) {
1003                 f->remove = true;
1004         }
1005         /* remove all VLAN filters */
1006         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
1007                 f->remove = true;
1008         }
1009         if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) &&
1010             adapter->state != __I40EVF_RESETTING) {
1011                 /* cancel any current operation */
1012                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1013                 /* Schedule operations to close down the HW. Don't wait
1014                  * here for this to complete. The watchdog is still running
1015                  * and it will take care of this.
1016                  */
1017                 adapter->aq_required = I40EVF_FLAG_AQ_DEL_MAC_FILTER;
1018                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
1019                 adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
1020         }
1021
1022         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1023 }
1024
1025 /**
1026  * i40evf_acquire_msix_vectors - Setup the MSIX capability
1027  * @adapter: board private structure
1028  * @vectors: number of vectors to request
1029  *
1030  * Work with the OS to set up the MSIX vectors needed.
1031  *
1032  * Returns 0 on success, negative on failure
1033  **/
1034 static int
1035 i40evf_acquire_msix_vectors(struct i40evf_adapter *adapter, int vectors)
1036 {
1037         int err, vector_threshold;
1038
1039         /* We'll want at least 3 (vector_threshold):
1040          * 0) Other (Admin Queue and link, mostly)
1041          * 1) TxQ[0] Cleanup
1042          * 2) RxQ[0] Cleanup
1043          */
1044         vector_threshold = MIN_MSIX_COUNT;
1045
1046         /* The more we get, the more we will assign to Tx/Rx Cleanup
1047          * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1048          * Right now, we simply care about how many we'll get; we'll
1049          * set them up later while requesting irq's.
1050          */
1051         err = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
1052                                     vector_threshold, vectors);
1053         if (err < 0) {
1054                 dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts\n");
1055                 kfree(adapter->msix_entries);
1056                 adapter->msix_entries = NULL;
1057                 return err;
1058         }
1059
1060         /* Adjust for only the vectors we'll use, which is minimum
1061          * of max_msix_q_vectors + NONQ_VECS, or the number of
1062          * vectors we were allocated.
1063          */
1064         adapter->num_msix_vectors = err;
1065         return 0;
1066 }
1067
1068 /**
1069  * i40evf_free_queues - Free memory for all rings
1070  * @adapter: board private structure to initialize
1071  *
1072  * Free all of the memory associated with queue pairs.
1073  **/
1074 static void i40evf_free_queues(struct i40evf_adapter *adapter)
1075 {
1076         int i;
1077
1078         if (!adapter->vsi_res)
1079                 return;
1080         for (i = 0; i < adapter->num_active_queues; i++) {
1081                 if (adapter->tx_rings[i])
1082                         kfree_rcu(adapter->tx_rings[i], rcu);
1083                 adapter->tx_rings[i] = NULL;
1084                 adapter->rx_rings[i] = NULL;
1085         }
1086 }
1087
1088 /**
1089  * i40evf_alloc_queues - Allocate memory for all rings
1090  * @adapter: board private structure to initialize
1091  *
1092  * We allocate one ring per queue at run-time since we don't know the
1093  * number of queues at compile-time.  The polling_netdev array is
1094  * intended for Multiqueue, but should work fine with a single queue.
1095  **/
1096 static int i40evf_alloc_queues(struct i40evf_adapter *adapter)
1097 {
1098         int i;
1099
1100         for (i = 0; i < adapter->num_active_queues; i++) {
1101                 struct i40e_ring *tx_ring;
1102                 struct i40e_ring *rx_ring;
1103
1104                 tx_ring = kzalloc(sizeof(*tx_ring) * 2, GFP_KERNEL);
1105                 if (!tx_ring)
1106                         goto err_out;
1107
1108                 tx_ring->queue_index = i;
1109                 tx_ring->netdev = adapter->netdev;
1110                 tx_ring->dev = &adapter->pdev->dev;
1111                 tx_ring->count = adapter->tx_desc_count;
1112                 adapter->tx_rings[i] = tx_ring;
1113
1114                 rx_ring = &tx_ring[1];
1115                 rx_ring->queue_index = i;
1116                 rx_ring->netdev = adapter->netdev;
1117                 rx_ring->dev = &adapter->pdev->dev;
1118                 rx_ring->count = adapter->rx_desc_count;
1119                 adapter->rx_rings[i] = rx_ring;
1120         }
1121
1122         return 0;
1123
1124 err_out:
1125         i40evf_free_queues(adapter);
1126         return -ENOMEM;
1127 }
1128
1129 /**
1130  * i40evf_set_interrupt_capability - set MSI-X or FAIL if not supported
1131  * @adapter: board private structure to initialize
1132  *
1133  * Attempt to configure the interrupts using the best available
1134  * capabilities of the hardware and the kernel.
1135  **/
1136 static int i40evf_set_interrupt_capability(struct i40evf_adapter *adapter)
1137 {
1138         int vector, v_budget;
1139         int pairs = 0;
1140         int err = 0;
1141
1142         if (!adapter->vsi_res) {
1143                 err = -EIO;
1144                 goto out;
1145         }
1146         pairs = adapter->num_active_queues;
1147
1148         /* It's easy to be greedy for MSI-X vectors, but it really
1149          * doesn't do us much good if we have a lot more vectors
1150          * than CPU's.  So let's be conservative and only ask for
1151          * (roughly) twice the number of vectors as there are CPU's.
1152          */
1153         v_budget = min_t(int, pairs, (int)(num_online_cpus() * 2)) + NONQ_VECS;
1154         v_budget = min_t(int, v_budget, (int)adapter->vf_res->max_vectors);
1155
1156         adapter->msix_entries = kcalloc(v_budget,
1157                                         sizeof(struct msix_entry), GFP_KERNEL);
1158         if (!adapter->msix_entries) {
1159                 err = -ENOMEM;
1160                 goto out;
1161         }
1162
1163         for (vector = 0; vector < v_budget; vector++)
1164                 adapter->msix_entries[vector].entry = vector;
1165
1166         err = i40evf_acquire_msix_vectors(adapter, v_budget);
1167
1168 out:
1169         adapter->netdev->real_num_tx_queues = pairs;
1170         return err;
1171 }
1172
1173 /**
1174  * i40e_configure_rss_aq - Prepare for RSS using AQ commands
1175  * @vsi: vsi structure
1176  * @seed: RSS hash seed
1177  **/
1178 static void i40evf_configure_rss_aq(struct i40e_vsi *vsi, const u8 *seed)
1179 {
1180         struct i40e_aqc_get_set_rss_key_data rss_key;
1181         struct i40evf_adapter *adapter = vsi->back;
1182         struct i40e_hw *hw = &adapter->hw;
1183         int ret = 0, i;
1184         u8 *rss_lut;
1185
1186         if (!vsi->id)
1187                 return;
1188
1189         if (adapter->current_op != I40E_VIRTCHNL_OP_UNKNOWN) {
1190                 /* bail because we already have a command pending */
1191                 dev_err(&adapter->pdev->dev, "Cannot confiure RSS, command %d pending\n",
1192                         adapter->current_op);
1193                 return;
1194         }
1195
1196         memset(&rss_key, 0, sizeof(rss_key));
1197         memcpy(&rss_key, seed, sizeof(rss_key));
1198
1199         rss_lut = kzalloc(((I40E_VFQF_HLUT_MAX_INDEX + 1) * 4), GFP_KERNEL);
1200         if (!rss_lut)
1201                 return;
1202
1203         /* Populate the LUT with max no. PF queues in round robin fashion */
1204         for (i = 0; i <= (I40E_VFQF_HLUT_MAX_INDEX * 4); i++)
1205                 rss_lut[i] = i % adapter->num_active_queues;
1206
1207         ret = i40evf_aq_set_rss_key(hw, vsi->id, &rss_key);
1208         if (ret) {
1209                 dev_err(&adapter->pdev->dev,
1210                         "Cannot set RSS key, err %s aq_err %s\n",
1211                         i40evf_stat_str(hw, ret),
1212                         i40evf_aq_str(hw, hw->aq.asq_last_status));
1213                 return;
1214         }
1215
1216         ret = i40evf_aq_set_rss_lut(hw, vsi->id, false, rss_lut,
1217                                     (I40E_VFQF_HLUT_MAX_INDEX + 1) * 4);
1218         if (ret)
1219                 dev_err(&adapter->pdev->dev,
1220                         "Cannot set RSS lut, err %s aq_err %s\n",
1221                         i40evf_stat_str(hw, ret),
1222                         i40evf_aq_str(hw, hw->aq.asq_last_status));
1223 }
1224
1225 /**
1226  * i40e_configure_rss_reg - Prepare for RSS if used
1227  * @adapter: board private structure
1228  * @seed: RSS hash seed
1229  **/
1230 static void i40evf_configure_rss_reg(struct i40evf_adapter *adapter,
1231                                      const u8 *seed)
1232 {
1233         struct i40e_hw *hw = &adapter->hw;
1234         u32 *seed_dw = (u32 *)seed;
1235         u32 cqueue = 0;
1236         u32 lut = 0;
1237         int i, j;
1238
1239         /* Fill out hash function seed */
1240         for (i = 0; i <= I40E_VFQF_HKEY_MAX_INDEX; i++)
1241                 wr32(hw, I40E_VFQF_HKEY(i), seed_dw[i]);
1242
1243         /* Populate the LUT with max no. PF queues in round robin fashion */
1244         for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++) {
1245                 lut = 0;
1246                 for (j = 0; j < 4; j++) {
1247                         if (cqueue == adapter->num_active_queues)
1248                                 cqueue = 0;
1249                         lut |= ((cqueue) << (8 * j));
1250                         cqueue++;
1251                 }
1252                 wr32(hw, I40E_VFQF_HLUT(i), lut);
1253         }
1254         i40e_flush(hw);
1255 }
1256
1257 /**
1258  * i40evf_configure_rss - Prepare for RSS
1259  * @adapter: board private structure
1260  **/
1261 static void i40evf_configure_rss(struct i40evf_adapter *adapter)
1262 {
1263         struct i40e_hw *hw = &adapter->hw;
1264         u8 seed[I40EVF_HKEY_ARRAY_SIZE];
1265         u64 hena;
1266
1267         netdev_rss_key_fill((void *)seed, I40EVF_HKEY_ARRAY_SIZE);
1268
1269         /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
1270         hena = I40E_DEFAULT_RSS_HENA;
1271         wr32(hw, I40E_VFQF_HENA(0), (u32)hena);
1272         wr32(hw, I40E_VFQF_HENA(1), (u32)(hena >> 32));
1273
1274         if (RSS_AQ(adapter))
1275                 i40evf_configure_rss_aq(&adapter->vsi, seed);
1276         else
1277                 i40evf_configure_rss_reg(adapter, seed);
1278 }
1279
1280 /**
1281  * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors
1282  * @adapter: board private structure to initialize
1283  *
1284  * We allocate one q_vector per queue interrupt.  If allocation fails we
1285  * return -ENOMEM.
1286  **/
1287 static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
1288 {
1289         int q_idx, num_q_vectors;
1290         struct i40e_q_vector *q_vector;
1291
1292         num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1293
1294         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1295                 q_vector = kzalloc(sizeof(*q_vector), GFP_KERNEL);
1296                 if (!q_vector)
1297                         goto err_out;
1298                 q_vector->adapter = adapter;
1299                 q_vector->vsi = &adapter->vsi;
1300                 q_vector->v_idx = q_idx;
1301                 netif_napi_add(adapter->netdev, &q_vector->napi,
1302                                i40evf_napi_poll, NAPI_POLL_WEIGHT);
1303                 adapter->q_vector[q_idx] = q_vector;
1304         }
1305
1306         return 0;
1307
1308 err_out:
1309         while (q_idx) {
1310                 q_idx--;
1311                 q_vector = adapter->q_vector[q_idx];
1312                 netif_napi_del(&q_vector->napi);
1313                 kfree(q_vector);
1314                 adapter->q_vector[q_idx] = NULL;
1315         }
1316         return -ENOMEM;
1317 }
1318
1319 /**
1320  * i40evf_free_q_vectors - Free memory allocated for interrupt vectors
1321  * @adapter: board private structure to initialize
1322  *
1323  * This function frees the memory allocated to the q_vectors.  In addition if
1324  * NAPI is enabled it will delete any references to the NAPI struct prior
1325  * to freeing the q_vector.
1326  **/
1327 static void i40evf_free_q_vectors(struct i40evf_adapter *adapter)
1328 {
1329         int q_idx, num_q_vectors;
1330         int napi_vectors;
1331
1332         num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1333         napi_vectors = adapter->num_active_queues;
1334
1335         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1336                 struct i40e_q_vector *q_vector = adapter->q_vector[q_idx];
1337
1338                 adapter->q_vector[q_idx] = NULL;
1339                 if (q_idx < napi_vectors)
1340                         netif_napi_del(&q_vector->napi);
1341                 kfree(q_vector);
1342         }
1343 }
1344
1345 /**
1346  * i40evf_reset_interrupt_capability - Reset MSIX setup
1347  * @adapter: board private structure
1348  *
1349  **/
1350 void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
1351 {
1352         pci_disable_msix(adapter->pdev);
1353         kfree(adapter->msix_entries);
1354         adapter->msix_entries = NULL;
1355 }
1356
1357 /**
1358  * i40evf_init_interrupt_scheme - Determine if MSIX is supported and init
1359  * @adapter: board private structure to initialize
1360  *
1361  **/
1362 int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter)
1363 {
1364         int err;
1365
1366         err = i40evf_set_interrupt_capability(adapter);
1367         if (err) {
1368                 dev_err(&adapter->pdev->dev,
1369                         "Unable to setup interrupt capabilities\n");
1370                 goto err_set_interrupt;
1371         }
1372
1373         err = i40evf_alloc_q_vectors(adapter);
1374         if (err) {
1375                 dev_err(&adapter->pdev->dev,
1376                         "Unable to allocate memory for queue vectors\n");
1377                 goto err_alloc_q_vectors;
1378         }
1379
1380         err = i40evf_alloc_queues(adapter);
1381         if (err) {
1382                 dev_err(&adapter->pdev->dev,
1383                         "Unable to allocate memory for queues\n");
1384                 goto err_alloc_queues;
1385         }
1386
1387         dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
1388                  (adapter->num_active_queues > 1) ? "Enabled" : "Disabled",
1389                  adapter->num_active_queues);
1390
1391         return 0;
1392 err_alloc_queues:
1393         i40evf_free_q_vectors(adapter);
1394 err_alloc_q_vectors:
1395         i40evf_reset_interrupt_capability(adapter);
1396 err_set_interrupt:
1397         return err;
1398 }
1399
1400 /**
1401  * i40evf_watchdog_timer - Periodic call-back timer
1402  * @data: pointer to adapter disguised as unsigned long
1403  **/
1404 static void i40evf_watchdog_timer(unsigned long data)
1405 {
1406         struct i40evf_adapter *adapter = (struct i40evf_adapter *)data;
1407
1408         schedule_work(&adapter->watchdog_task);
1409         /* timer will be rescheduled in watchdog task */
1410 }
1411
1412 /**
1413  * i40evf_watchdog_task - Periodic call-back task
1414  * @work: pointer to work_struct
1415  **/
1416 static void i40evf_watchdog_task(struct work_struct *work)
1417 {
1418         struct i40evf_adapter *adapter = container_of(work,
1419                                                       struct i40evf_adapter,
1420                                                       watchdog_task);
1421         struct i40e_hw *hw = &adapter->hw;
1422         u32 reg_val;
1423
1424         if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
1425                 goto restart_watchdog;
1426
1427         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1428                 reg_val = rd32(hw, I40E_VFGEN_RSTAT) &
1429                           I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1430                 if ((reg_val == I40E_VFR_VFACTIVE) ||
1431                     (reg_val == I40E_VFR_COMPLETED)) {
1432                         /* A chance for redemption! */
1433                         dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
1434                         adapter->state = __I40EVF_STARTUP;
1435                         adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1436                         schedule_delayed_work(&adapter->init_task, 10);
1437                         clear_bit(__I40EVF_IN_CRITICAL_TASK,
1438                                   &adapter->crit_section);
1439                         /* Don't reschedule the watchdog, since we've restarted
1440                          * the init task. When init_task contacts the PF and
1441                          * gets everything set up again, it'll restart the
1442                          * watchdog for us. Down, boy. Sit. Stay. Woof.
1443                          */
1444                         return;
1445                 }
1446                 adapter->aq_required = 0;
1447                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1448                 goto watchdog_done;
1449         }
1450
1451         if ((adapter->state < __I40EVF_DOWN) ||
1452             (adapter->flags & I40EVF_FLAG_RESET_PENDING))
1453                 goto watchdog_done;
1454
1455         /* check for reset */
1456         reg_val = rd32(hw, I40E_VF_ARQLEN1) & I40E_VF_ARQLEN1_ARQENABLE_MASK;
1457         if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) && !reg_val) {
1458                 adapter->state = __I40EVF_RESETTING;
1459                 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1460                 dev_err(&adapter->pdev->dev, "Hardware reset detected\n");
1461                 schedule_work(&adapter->reset_task);
1462                 adapter->aq_required = 0;
1463                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1464                 goto watchdog_done;
1465         }
1466
1467         /* Process admin queue tasks. After init, everything gets done
1468          * here so we don't race on the admin queue.
1469          */
1470         if (adapter->current_op) {
1471                 if (!i40evf_asq_done(hw)) {
1472                         dev_dbg(&adapter->pdev->dev, "Admin queue timeout\n");
1473                         i40evf_send_api_ver(adapter);
1474                 }
1475                 goto watchdog_done;
1476         }
1477         if (adapter->aq_required & I40EVF_FLAG_AQ_GET_CONFIG) {
1478                 i40evf_send_vf_config_msg(adapter);
1479                 goto watchdog_done;
1480         }
1481
1482         if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
1483                 i40evf_disable_queues(adapter);
1484                 goto watchdog_done;
1485         }
1486
1487         if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
1488                 i40evf_map_queues(adapter);
1489                 goto watchdog_done;
1490         }
1491
1492         if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
1493                 i40evf_add_ether_addrs(adapter);
1494                 goto watchdog_done;
1495         }
1496
1497         if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
1498                 i40evf_add_vlans(adapter);
1499                 goto watchdog_done;
1500         }
1501
1502         if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
1503                 i40evf_del_ether_addrs(adapter);
1504                 goto watchdog_done;
1505         }
1506
1507         if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
1508                 i40evf_del_vlans(adapter);
1509                 goto watchdog_done;
1510         }
1511
1512         if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
1513                 i40evf_configure_queues(adapter);
1514                 goto watchdog_done;
1515         }
1516
1517         if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
1518                 i40evf_enable_queues(adapter);
1519                 goto watchdog_done;
1520         }
1521
1522         if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_RSS) {
1523                 /* This message goes straight to the firmware, not the
1524                  * PF, so we don't have to set current_op as we will
1525                  * not get a response through the ARQ.
1526                  */
1527                 i40evf_configure_rss(adapter);
1528                 adapter->aq_required &= ~I40EVF_FLAG_AQ_CONFIGURE_RSS;
1529                 goto watchdog_done;
1530         }
1531
1532         if (adapter->state == __I40EVF_RUNNING)
1533                 i40evf_request_stats(adapter);
1534 watchdog_done:
1535         if (adapter->state == __I40EVF_RUNNING) {
1536                 i40evf_irq_enable_queues(adapter, ~0);
1537                 i40evf_fire_sw_int(adapter, 0xFF);
1538         } else {
1539                 i40evf_fire_sw_int(adapter, 0x1);
1540         }
1541
1542         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1543 restart_watchdog:
1544         if (adapter->state == __I40EVF_REMOVE)
1545                 return;
1546         if (adapter->aq_required)
1547                 mod_timer(&adapter->watchdog_timer,
1548                           jiffies + msecs_to_jiffies(20));
1549         else
1550                 mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
1551         schedule_work(&adapter->adminq_task);
1552 }
1553
1554 #define I40EVF_RESET_WAIT_MS 10
1555 #define I40EVF_RESET_WAIT_COUNT 500
1556 /**
1557  * i40evf_reset_task - Call-back task to handle hardware reset
1558  * @work: pointer to work_struct
1559  *
1560  * During reset we need to shut down and reinitialize the admin queue
1561  * before we can use it to communicate with the PF again. We also clear
1562  * and reinit the rings because that context is lost as well.
1563  **/
1564 static void i40evf_reset_task(struct work_struct *work)
1565 {
1566         struct i40evf_adapter *adapter = container_of(work,
1567                                                       struct i40evf_adapter,
1568                                                       reset_task);
1569         struct net_device *netdev = adapter->netdev;
1570         struct i40e_hw *hw = &adapter->hw;
1571         struct i40evf_mac_filter *f;
1572         u32 reg_val;
1573         int i = 0, err;
1574
1575         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1576                                 &adapter->crit_section))
1577                 usleep_range(500, 1000);
1578
1579         i40evf_misc_irq_disable(adapter);
1580         if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) {
1581                 adapter->flags &= ~I40EVF_FLAG_RESET_NEEDED;
1582                 /* Restart the AQ here. If we have been reset but didn't
1583                  * detect it, or if the PF had to reinit, our AQ will be hosed.
1584                  */
1585                 i40evf_shutdown_adminq(hw);
1586                 i40evf_init_adminq(hw);
1587                 i40evf_request_reset(adapter);
1588         }
1589         adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1590
1591         /* poll until we see the reset actually happen */
1592         for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1593                 reg_val = rd32(hw, I40E_VF_ARQLEN1) &
1594                           I40E_VF_ARQLEN1_ARQENABLE_MASK;
1595                 if (!reg_val)
1596                         break;
1597                 usleep_range(5000, 10000);
1598         }
1599         if (i == I40EVF_RESET_WAIT_COUNT) {
1600                 dev_info(&adapter->pdev->dev, "Never saw reset\n");
1601                 goto continue_reset; /* act like the reset happened */
1602         }
1603
1604         /* wait until the reset is complete and the PF is responding to us */
1605         for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1606                 reg_val = rd32(hw, I40E_VFGEN_RSTAT) &
1607                           I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1608                 if (reg_val == I40E_VFR_VFACTIVE)
1609                         break;
1610                 msleep(I40EVF_RESET_WAIT_MS);
1611         }
1612         /* extra wait to make sure minimum wait is met */
1613         msleep(I40EVF_RESET_WAIT_MS);
1614         if (i == I40EVF_RESET_WAIT_COUNT) {
1615                 struct i40evf_mac_filter *f, *ftmp;
1616                 struct i40evf_vlan_filter *fv, *fvtmp;
1617
1618                 /* reset never finished */
1619                 dev_err(&adapter->pdev->dev, "Reset never finished (%x)\n",
1620                         reg_val);
1621                 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
1622
1623                 if (netif_running(adapter->netdev)) {
1624                         set_bit(__I40E_DOWN, &adapter->vsi.state);
1625                         netif_carrier_off(netdev);
1626                         netif_tx_disable(netdev);
1627                         i40evf_napi_disable_all(adapter);
1628                         i40evf_irq_disable(adapter);
1629                         i40evf_free_traffic_irqs(adapter);
1630                         i40evf_free_all_tx_resources(adapter);
1631                         i40evf_free_all_rx_resources(adapter);
1632                 }
1633
1634                 /* Delete all of the filters, both MAC and VLAN. */
1635                 list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list,
1636                                          list) {
1637                         list_del(&f->list);
1638                         kfree(f);
1639                 }
1640
1641                 list_for_each_entry_safe(fv, fvtmp, &adapter->vlan_filter_list,
1642                                          list) {
1643                         list_del(&fv->list);
1644                         kfree(fv);
1645                 }
1646
1647                 i40evf_free_misc_irq(adapter);
1648                 i40evf_reset_interrupt_capability(adapter);
1649                 i40evf_free_queues(adapter);
1650                 i40evf_free_q_vectors(adapter);
1651                 kfree(adapter->vf_res);
1652                 i40evf_shutdown_adminq(hw);
1653                 adapter->netdev->flags &= ~IFF_UP;
1654                 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1655                 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1656                 dev_info(&adapter->pdev->dev, "Reset task did not complete, VF disabled\n");
1657                 return; /* Do not attempt to reinit. It's dead, Jim. */
1658         }
1659
1660 continue_reset:
1661         if (netif_running(adapter->netdev)) {
1662                 netif_carrier_off(netdev);
1663                 netif_tx_stop_all_queues(netdev);
1664                 i40evf_napi_disable_all(adapter);
1665         }
1666         i40evf_irq_disable(adapter);
1667
1668         adapter->state = __I40EVF_RESETTING;
1669         adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1670
1671         /* free the Tx/Rx rings and descriptors, might be better to just
1672          * re-use them sometime in the future
1673          */
1674         i40evf_free_all_rx_resources(adapter);
1675         i40evf_free_all_tx_resources(adapter);
1676
1677         /* kill and reinit the admin queue */
1678         if (i40evf_shutdown_adminq(hw))
1679                 dev_warn(&adapter->pdev->dev, "Failed to shut down adminq\n");
1680         adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1681         err = i40evf_init_adminq(hw);
1682         if (err)
1683                 dev_info(&adapter->pdev->dev, "Failed to init adminq: %d\n",
1684                          err);
1685
1686         adapter->aq_required = I40EVF_FLAG_AQ_GET_CONFIG;
1687         adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
1688
1689         /* re-add all MAC filters */
1690         list_for_each_entry(f, &adapter->mac_filter_list, list) {
1691                 f->add = true;
1692         }
1693         /* re-add all VLAN filters */
1694         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
1695                 f->add = true;
1696         }
1697         adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
1698         adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
1699         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1700         i40evf_misc_irq_enable(adapter);
1701
1702         mod_timer(&adapter->watchdog_timer, jiffies + 2);
1703
1704         if (netif_running(adapter->netdev)) {
1705                 /* allocate transmit descriptors */
1706                 err = i40evf_setup_all_tx_resources(adapter);
1707                 if (err)
1708                         goto reset_err;
1709
1710                 /* allocate receive descriptors */
1711                 err = i40evf_setup_all_rx_resources(adapter);
1712                 if (err)
1713                         goto reset_err;
1714
1715                 i40evf_configure(adapter);
1716
1717                 err = i40evf_up_complete(adapter);
1718                 if (err)
1719                         goto reset_err;
1720
1721                 i40evf_irq_enable(adapter, true);
1722         } else {
1723                 adapter->state = __I40EVF_DOWN;
1724         }
1725
1726         return;
1727 reset_err:
1728         dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
1729         i40evf_close(adapter->netdev);
1730 }
1731
1732 /**
1733  * i40evf_adminq_task - worker thread to clean the admin queue
1734  * @work: pointer to work_struct containing our data
1735  **/
1736 static void i40evf_adminq_task(struct work_struct *work)
1737 {
1738         struct i40evf_adapter *adapter =
1739                 container_of(work, struct i40evf_adapter, adminq_task);
1740         struct i40e_hw *hw = &adapter->hw;
1741         struct i40e_arq_event_info event;
1742         struct i40e_virtchnl_msg *v_msg;
1743         i40e_status ret;
1744         u32 val, oldval;
1745         u16 pending;
1746
1747         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
1748                 goto out;
1749
1750         event.buf_len = I40EVF_MAX_AQ_BUF_SIZE;
1751         event.msg_buf = kzalloc(event.buf_len, GFP_KERNEL);
1752         if (!event.msg_buf)
1753                 goto out;
1754
1755         v_msg = (struct i40e_virtchnl_msg *)&event.desc;
1756         do {
1757                 ret = i40evf_clean_arq_element(hw, &event, &pending);
1758                 if (ret || !v_msg->v_opcode)
1759                         break; /* No event to process or error cleaning ARQ */
1760
1761                 i40evf_virtchnl_completion(adapter, v_msg->v_opcode,
1762                                            v_msg->v_retval, event.msg_buf,
1763                                            event.msg_len);
1764                 if (pending != 0)
1765                         memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
1766         } while (pending);
1767
1768         if ((adapter->flags &
1769              (I40EVF_FLAG_RESET_PENDING | I40EVF_FLAG_RESET_NEEDED)) ||
1770             adapter->state == __I40EVF_RESETTING)
1771                 goto freedom;
1772
1773         /* check for error indications */
1774         val = rd32(hw, hw->aq.arq.len);
1775         oldval = val;
1776         if (val & I40E_VF_ARQLEN1_ARQVFE_MASK) {
1777                 dev_info(&adapter->pdev->dev, "ARQ VF Error detected\n");
1778                 val &= ~I40E_VF_ARQLEN1_ARQVFE_MASK;
1779         }
1780         if (val & I40E_VF_ARQLEN1_ARQOVFL_MASK) {
1781                 dev_info(&adapter->pdev->dev, "ARQ Overflow Error detected\n");
1782                 val &= ~I40E_VF_ARQLEN1_ARQOVFL_MASK;
1783         }
1784         if (val & I40E_VF_ARQLEN1_ARQCRIT_MASK) {
1785                 dev_info(&adapter->pdev->dev, "ARQ Critical Error detected\n");
1786                 val &= ~I40E_VF_ARQLEN1_ARQCRIT_MASK;
1787         }
1788         if (oldval != val)
1789                 wr32(hw, hw->aq.arq.len, val);
1790
1791         val = rd32(hw, hw->aq.asq.len);
1792         oldval = val;
1793         if (val & I40E_VF_ATQLEN1_ATQVFE_MASK) {
1794                 dev_info(&adapter->pdev->dev, "ASQ VF Error detected\n");
1795                 val &= ~I40E_VF_ATQLEN1_ATQVFE_MASK;
1796         }
1797         if (val & I40E_VF_ATQLEN1_ATQOVFL_MASK) {
1798                 dev_info(&adapter->pdev->dev, "ASQ Overflow Error detected\n");
1799                 val &= ~I40E_VF_ATQLEN1_ATQOVFL_MASK;
1800         }
1801         if (val & I40E_VF_ATQLEN1_ATQCRIT_MASK) {
1802                 dev_info(&adapter->pdev->dev, "ASQ Critical Error detected\n");
1803                 val &= ~I40E_VF_ATQLEN1_ATQCRIT_MASK;
1804         }
1805         if (oldval != val)
1806                 wr32(hw, hw->aq.asq.len, val);
1807
1808 freedom:
1809         kfree(event.msg_buf);
1810 out:
1811         /* re-enable Admin queue interrupt cause */
1812         i40evf_misc_irq_enable(adapter);
1813 }
1814
1815 /**
1816  * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
1817  * @adapter: board private structure
1818  *
1819  * Free all transmit software resources
1820  **/
1821 void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
1822 {
1823         int i;
1824
1825         for (i = 0; i < adapter->num_active_queues; i++)
1826                 if (adapter->tx_rings[i]->desc)
1827                         i40evf_free_tx_resources(adapter->tx_rings[i]);
1828 }
1829
1830 /**
1831  * i40evf_setup_all_tx_resources - allocate all queues Tx resources
1832  * @adapter: board private structure
1833  *
1834  * If this function returns with an error, then it's possible one or
1835  * more of the rings is populated (while the rest are not).  It is the
1836  * callers duty to clean those orphaned rings.
1837  *
1838  * Return 0 on success, negative on failure
1839  **/
1840 static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter)
1841 {
1842         int i, err = 0;
1843
1844         for (i = 0; i < adapter->num_active_queues; i++) {
1845                 adapter->tx_rings[i]->count = adapter->tx_desc_count;
1846                 err = i40evf_setup_tx_descriptors(adapter->tx_rings[i]);
1847                 if (!err)
1848                         continue;
1849                 dev_err(&adapter->pdev->dev,
1850                         "Allocation for Tx Queue %u failed\n", i);
1851                 break;
1852         }
1853
1854         return err;
1855 }
1856
1857 /**
1858  * i40evf_setup_all_rx_resources - allocate all queues Rx resources
1859  * @adapter: board private structure
1860  *
1861  * If this function returns with an error, then it's possible one or
1862  * more of the rings is populated (while the rest are not).  It is the
1863  * callers duty to clean those orphaned rings.
1864  *
1865  * Return 0 on success, negative on failure
1866  **/
1867 static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter)
1868 {
1869         int i, err = 0;
1870
1871         for (i = 0; i < adapter->num_active_queues; i++) {
1872                 adapter->rx_rings[i]->count = adapter->rx_desc_count;
1873                 err = i40evf_setup_rx_descriptors(adapter->rx_rings[i]);
1874                 if (!err)
1875                         continue;
1876                 dev_err(&adapter->pdev->dev,
1877                         "Allocation for Rx Queue %u failed\n", i);
1878                 break;
1879         }
1880         return err;
1881 }
1882
1883 /**
1884  * i40evf_free_all_rx_resources - Free Rx Resources for All Queues
1885  * @adapter: board private structure
1886  *
1887  * Free all receive software resources
1888  **/
1889 void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
1890 {
1891         int i;
1892
1893         for (i = 0; i < adapter->num_active_queues; i++)
1894                 if (adapter->rx_rings[i]->desc)
1895                         i40evf_free_rx_resources(adapter->rx_rings[i]);
1896 }
1897
1898 /**
1899  * i40evf_open - Called when a network interface is made active
1900  * @netdev: network interface device structure
1901  *
1902  * Returns 0 on success, negative value on failure
1903  *
1904  * The open entry point is called when a network interface is made
1905  * active by the system (IFF_UP).  At this point all resources needed
1906  * for transmit and receive operations are allocated, the interrupt
1907  * handler is registered with the OS, the watchdog timer is started,
1908  * and the stack is notified that the interface is ready.
1909  **/
1910 static int i40evf_open(struct net_device *netdev)
1911 {
1912         struct i40evf_adapter *adapter = netdev_priv(netdev);
1913         int err;
1914
1915         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1916                 dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
1917                 return -EIO;
1918         }
1919         if (adapter->state != __I40EVF_DOWN || adapter->aq_required)
1920                 return -EBUSY;
1921
1922         /* allocate transmit descriptors */
1923         err = i40evf_setup_all_tx_resources(adapter);
1924         if (err)
1925                 goto err_setup_tx;
1926
1927         /* allocate receive descriptors */
1928         err = i40evf_setup_all_rx_resources(adapter);
1929         if (err)
1930                 goto err_setup_rx;
1931
1932         /* clear any pending interrupts, may auto mask */
1933         err = i40evf_request_traffic_irqs(adapter, netdev->name);
1934         if (err)
1935                 goto err_req_irq;
1936
1937         i40evf_add_filter(adapter, adapter->hw.mac.addr);
1938         i40evf_configure(adapter);
1939
1940         err = i40evf_up_complete(adapter);
1941         if (err)
1942                 goto err_req_irq;
1943
1944         i40evf_irq_enable(adapter, true);
1945
1946         return 0;
1947
1948 err_req_irq:
1949         i40evf_down(adapter);
1950         i40evf_free_traffic_irqs(adapter);
1951 err_setup_rx:
1952         i40evf_free_all_rx_resources(adapter);
1953 err_setup_tx:
1954         i40evf_free_all_tx_resources(adapter);
1955
1956         return err;
1957 }
1958
1959 /**
1960  * i40evf_close - Disables a network interface
1961  * @netdev: network interface device structure
1962  *
1963  * Returns 0, this is not allowed to fail
1964  *
1965  * The close entry point is called when an interface is de-activated
1966  * by the OS.  The hardware is still under the drivers control, but
1967  * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
1968  * are freed, along with all transmit and receive resources.
1969  **/
1970 static int i40evf_close(struct net_device *netdev)
1971 {
1972         struct i40evf_adapter *adapter = netdev_priv(netdev);
1973
1974         if (adapter->state <= __I40EVF_DOWN)
1975                 return 0;
1976
1977
1978         set_bit(__I40E_DOWN, &adapter->vsi.state);
1979
1980         i40evf_down(adapter);
1981         adapter->state = __I40EVF_DOWN;
1982         i40evf_free_traffic_irqs(adapter);
1983
1984         return 0;
1985 }
1986
1987 /**
1988  * i40evf_get_stats - Get System Network Statistics
1989  * @netdev: network interface device structure
1990  *
1991  * Returns the address of the device statistics structure.
1992  * The statistics are actually updated from the timer callback.
1993  **/
1994 static struct net_device_stats *i40evf_get_stats(struct net_device *netdev)
1995 {
1996         struct i40evf_adapter *adapter = netdev_priv(netdev);
1997
1998         /* only return the current stats */
1999         return &adapter->net_stats;
2000 }
2001
2002 /**
2003  * i40evf_change_mtu - Change the Maximum Transfer Unit
2004  * @netdev: network interface device structure
2005  * @new_mtu: new value for maximum frame size
2006  *
2007  * Returns 0 on success, negative on failure
2008  **/
2009 static int i40evf_change_mtu(struct net_device *netdev, int new_mtu)
2010 {
2011         struct i40evf_adapter *adapter = netdev_priv(netdev);
2012         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
2013
2014         if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
2015                 return -EINVAL;
2016
2017         netdev->mtu = new_mtu;
2018         adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
2019         schedule_work(&adapter->reset_task);
2020
2021         return 0;
2022 }
2023
2024 static const struct net_device_ops i40evf_netdev_ops = {
2025         .ndo_open               = i40evf_open,
2026         .ndo_stop               = i40evf_close,
2027         .ndo_start_xmit         = i40evf_xmit_frame,
2028         .ndo_get_stats          = i40evf_get_stats,
2029         .ndo_set_rx_mode        = i40evf_set_rx_mode,
2030         .ndo_validate_addr      = eth_validate_addr,
2031         .ndo_set_mac_address    = i40evf_set_mac,
2032         .ndo_change_mtu         = i40evf_change_mtu,
2033         .ndo_tx_timeout         = i40evf_tx_timeout,
2034         .ndo_vlan_rx_add_vid    = i40evf_vlan_rx_add_vid,
2035         .ndo_vlan_rx_kill_vid   = i40evf_vlan_rx_kill_vid,
2036 };
2037
2038 /**
2039  * i40evf_check_reset_complete - check that VF reset is complete
2040  * @hw: pointer to hw struct
2041  *
2042  * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
2043  **/
2044 static int i40evf_check_reset_complete(struct i40e_hw *hw)
2045 {
2046         u32 rstat;
2047         int i;
2048
2049         for (i = 0; i < 100; i++) {
2050                 rstat = rd32(hw, I40E_VFGEN_RSTAT) &
2051                             I40E_VFGEN_RSTAT_VFR_STATE_MASK;
2052                 if ((rstat == I40E_VFR_VFACTIVE) ||
2053                     (rstat == I40E_VFR_COMPLETED))
2054                         return 0;
2055                 usleep_range(10, 20);
2056         }
2057         return -EBUSY;
2058 }
2059
2060 /**
2061  * i40evf_process_config - Process the config information we got from the PF
2062  * @adapter: board private structure
2063  *
2064  * Verify that we have a valid config struct, and set up our netdev features
2065  * and our VSI struct.
2066  **/
2067 int i40evf_process_config(struct i40evf_adapter *adapter)
2068 {
2069         struct net_device *netdev = adapter->netdev;
2070         int i;
2071
2072         /* got VF config message back from PF, now we can parse it */
2073         for (i = 0; i < adapter->vf_res->num_vsis; i++) {
2074                 if (adapter->vf_res->vsi_res[i].vsi_type == I40E_VSI_SRIOV)
2075                         adapter->vsi_res = &adapter->vf_res->vsi_res[i];
2076         }
2077         if (!adapter->vsi_res) {
2078                 dev_err(&adapter->pdev->dev, "No LAN VSI found\n");
2079                 return -ENODEV;
2080         }
2081
2082         if (adapter->vf_res->vf_offload_flags
2083             & I40E_VIRTCHNL_VF_OFFLOAD_VLAN) {
2084                 netdev->vlan_features = netdev->features;
2085                 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX |
2086                                     NETIF_F_HW_VLAN_CTAG_RX |
2087                                     NETIF_F_HW_VLAN_CTAG_FILTER;
2088         }
2089         netdev->features |= NETIF_F_HIGHDMA |
2090                             NETIF_F_SG |
2091                             NETIF_F_IP_CSUM |
2092                             NETIF_F_SCTP_CSUM |
2093                             NETIF_F_IPV6_CSUM |
2094                             NETIF_F_TSO |
2095                             NETIF_F_TSO6 |
2096                             NETIF_F_RXCSUM |
2097                             NETIF_F_GRO;
2098
2099         /* copy netdev features into list of user selectable features */
2100         netdev->hw_features |= netdev->features;
2101         netdev->hw_features &= ~NETIF_F_RXCSUM;
2102
2103         adapter->vsi.id = adapter->vsi_res->vsi_id;
2104
2105         adapter->vsi.back = adapter;
2106         adapter->vsi.base_vector = 1;
2107         adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
2108         adapter->vsi.rx_itr_setting = (I40E_ITR_DYNAMIC |
2109                                        ITR_REG_TO_USEC(I40E_ITR_RX_DEF));
2110         adapter->vsi.tx_itr_setting = (I40E_ITR_DYNAMIC |
2111                                        ITR_REG_TO_USEC(I40E_ITR_TX_DEF));
2112         adapter->vsi.netdev = adapter->netdev;
2113         return 0;
2114 }
2115
2116 /**
2117  * i40evf_init_task - worker thread to perform delayed initialization
2118  * @work: pointer to work_struct containing our data
2119  *
2120  * This task completes the work that was begun in probe. Due to the nature
2121  * of VF-PF communications, we may need to wait tens of milliseconds to get
2122  * responses back from the PF. Rather than busy-wait in probe and bog down the
2123  * whole system, we'll do it in a task so we can sleep.
2124  * This task only runs during driver init. Once we've established
2125  * communications with the PF driver and set up our netdev, the watchdog
2126  * takes over.
2127  **/
2128 static void i40evf_init_task(struct work_struct *work)
2129 {
2130         struct i40evf_adapter *adapter = container_of(work,
2131                                                       struct i40evf_adapter,
2132                                                       init_task.work);
2133         struct net_device *netdev = adapter->netdev;
2134         struct i40e_hw *hw = &adapter->hw;
2135         struct pci_dev *pdev = adapter->pdev;
2136         int err, bufsz;
2137
2138         switch (adapter->state) {
2139         case __I40EVF_STARTUP:
2140                 /* driver loaded, probe complete */
2141                 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
2142                 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
2143                 err = i40e_set_mac_type(hw);
2144                 if (err) {
2145                         dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
2146                                 err);
2147                         goto err;
2148                 }
2149                 err = i40evf_check_reset_complete(hw);
2150                 if (err) {
2151                         dev_info(&pdev->dev, "Device is still in reset (%d), retrying\n",
2152                                  err);
2153                         goto err;
2154                 }
2155                 hw->aq.num_arq_entries = I40EVF_AQ_LEN;
2156                 hw->aq.num_asq_entries = I40EVF_AQ_LEN;
2157                 hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2158                 hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
2159
2160                 err = i40evf_init_adminq(hw);
2161                 if (err) {
2162                         dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
2163                                 err);
2164                         goto err;
2165                 }
2166                 err = i40evf_send_api_ver(adapter);
2167                 if (err) {
2168                         dev_err(&pdev->dev, "Unable to send to PF (%d)\n", err);
2169                         i40evf_shutdown_adminq(hw);
2170                         goto err;
2171                 }
2172                 adapter->state = __I40EVF_INIT_VERSION_CHECK;
2173                 goto restart;
2174         case __I40EVF_INIT_VERSION_CHECK:
2175                 if (!i40evf_asq_done(hw)) {
2176                         dev_err(&pdev->dev, "Admin queue command never completed\n");
2177                         i40evf_shutdown_adminq(hw);
2178                         adapter->state = __I40EVF_STARTUP;
2179                         goto err;
2180                 }
2181
2182                 /* aq msg sent, awaiting reply */
2183                 err = i40evf_verify_api_ver(adapter);
2184                 if (err) {
2185                         if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
2186                                 err = i40evf_send_api_ver(adapter);
2187                         else
2188                                 dev_err(&pdev->dev, "Unsupported PF API version %d.%d, expected %d.%d\n",
2189                                         adapter->pf_version.major,
2190                                         adapter->pf_version.minor,
2191                                         I40E_VIRTCHNL_VERSION_MAJOR,
2192                                         I40E_VIRTCHNL_VERSION_MINOR);
2193                         goto err;
2194                 }
2195                 err = i40evf_send_vf_config_msg(adapter);
2196                 if (err) {
2197                         dev_err(&pdev->dev, "Unable to send config request (%d)\n",
2198                                 err);
2199                         goto err;
2200                 }
2201                 adapter->state = __I40EVF_INIT_GET_RESOURCES;
2202                 goto restart;
2203         case __I40EVF_INIT_GET_RESOURCES:
2204                 /* aq msg sent, awaiting reply */
2205                 if (!adapter->vf_res) {
2206                         bufsz = sizeof(struct i40e_virtchnl_vf_resource) +
2207                                 (I40E_MAX_VF_VSI *
2208                                  sizeof(struct i40e_virtchnl_vsi_resource));
2209                         adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
2210                         if (!adapter->vf_res)
2211                                 goto err;
2212                 }
2213                 err = i40evf_get_vf_config(adapter);
2214                 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK) {
2215                         err = i40evf_send_vf_config_msg(adapter);
2216                         goto err;
2217                 }
2218                 if (err) {
2219                         dev_err(&pdev->dev, "Unable to get VF config (%d)\n",
2220                                 err);
2221                         goto err_alloc;
2222                 }
2223                 adapter->state = __I40EVF_INIT_SW;
2224                 break;
2225         default:
2226                 goto err_alloc;
2227         }
2228         if (i40evf_process_config(adapter))
2229                 goto err_alloc;
2230         adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
2231
2232         adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
2233
2234         netdev->netdev_ops = &i40evf_netdev_ops;
2235         i40evf_set_ethtool_ops(netdev);
2236         netdev->watchdog_timeo = 5 * HZ;
2237
2238         if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
2239                 dev_info(&pdev->dev, "Invalid MAC address %pM, using random\n",
2240                          adapter->hw.mac.addr);
2241                 random_ether_addr(adapter->hw.mac.addr);
2242         }
2243         ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
2244         ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
2245
2246         init_timer(&adapter->watchdog_timer);
2247         adapter->watchdog_timer.function = &i40evf_watchdog_timer;
2248         adapter->watchdog_timer.data = (unsigned long)adapter;
2249         mod_timer(&adapter->watchdog_timer, jiffies + 1);
2250
2251         adapter->num_active_queues = min_t(int,
2252                                            adapter->vsi_res->num_queue_pairs,
2253                                            (int)(num_online_cpus()));
2254         adapter->tx_desc_count = I40EVF_DEFAULT_TXD;
2255         adapter->rx_desc_count = I40EVF_DEFAULT_RXD;
2256         err = i40evf_init_interrupt_scheme(adapter);
2257         if (err)
2258                 goto err_sw_init;
2259         i40evf_map_rings_to_vectors(adapter);
2260         if (!RSS_AQ(adapter))
2261                 i40evf_configure_rss(adapter);
2262         err = i40evf_request_misc_irq(adapter);
2263         if (err)
2264                 goto err_sw_init;
2265
2266         netif_carrier_off(netdev);
2267
2268         if (!adapter->netdev_registered) {
2269                 err = register_netdev(netdev);
2270                 if (err)
2271                         goto err_register;
2272         }
2273
2274         adapter->netdev_registered = true;
2275
2276         netif_tx_stop_all_queues(netdev);
2277
2278         dev_info(&pdev->dev, "MAC address: %pM\n", adapter->hw.mac.addr);
2279         if (netdev->features & NETIF_F_GRO)
2280                 dev_info(&pdev->dev, "GRO is enabled\n");
2281
2282         dev_info(&pdev->dev, "%s\n", i40evf_driver_string);
2283         adapter->state = __I40EVF_DOWN;
2284         set_bit(__I40E_DOWN, &adapter->vsi.state);
2285         i40evf_misc_irq_enable(adapter);
2286
2287         if (RSS_AQ(adapter)) {
2288                 adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_RSS;
2289                 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
2290         } else {
2291                 i40evf_configure_rss(adapter);
2292         }
2293         return;
2294 restart:
2295         schedule_delayed_work(&adapter->init_task, msecs_to_jiffies(30));
2296         return;
2297
2298 err_register:
2299         i40evf_free_misc_irq(adapter);
2300 err_sw_init:
2301         i40evf_reset_interrupt_capability(adapter);
2302 err_alloc:
2303         kfree(adapter->vf_res);
2304         adapter->vf_res = NULL;
2305 err:
2306         /* Things went into the weeds, so try again later */
2307         if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
2308                 dev_err(&pdev->dev, "Failed to communicate with PF; giving up\n");
2309                 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
2310                 return; /* do not reschedule */
2311         }
2312         schedule_delayed_work(&adapter->init_task, HZ * 3);
2313 }
2314
2315 /**
2316  * i40evf_shutdown - Shutdown the device in preparation for a reboot
2317  * @pdev: pci device structure
2318  **/
2319 static void i40evf_shutdown(struct pci_dev *pdev)
2320 {
2321         struct net_device *netdev = pci_get_drvdata(pdev);
2322         struct i40evf_adapter *adapter = netdev_priv(netdev);
2323
2324         netif_device_detach(netdev);
2325
2326         if (netif_running(netdev))
2327                 i40evf_close(netdev);
2328
2329         /* Prevent the watchdog from running. */
2330         adapter->state = __I40EVF_REMOVE;
2331         adapter->aq_required = 0;
2332
2333 #ifdef CONFIG_PM
2334         pci_save_state(pdev);
2335
2336 #endif
2337         pci_disable_device(pdev);
2338 }
2339
2340 /**
2341  * i40evf_probe - Device Initialization Routine
2342  * @pdev: PCI device information struct
2343  * @ent: entry in i40evf_pci_tbl
2344  *
2345  * Returns 0 on success, negative on failure
2346  *
2347  * i40evf_probe initializes an adapter identified by a pci_dev structure.
2348  * The OS initialization, configuring of the adapter private structure,
2349  * and a hardware reset occur.
2350  **/
2351 static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2352 {
2353         struct net_device *netdev;
2354         struct i40evf_adapter *adapter = NULL;
2355         struct i40e_hw *hw = NULL;
2356         int err;
2357
2358         err = pci_enable_device(pdev);
2359         if (err)
2360                 return err;
2361
2362         err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
2363         if (err) {
2364                 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2365                 if (err) {
2366                         dev_err(&pdev->dev,
2367                                 "DMA configuration failed: 0x%x\n", err);
2368                         goto err_dma;
2369                 }
2370         }
2371
2372         err = pci_request_regions(pdev, i40evf_driver_name);
2373         if (err) {
2374                 dev_err(&pdev->dev,
2375                         "pci_request_regions failed 0x%x\n", err);
2376                 goto err_pci_reg;
2377         }
2378
2379         pci_enable_pcie_error_reporting(pdev);
2380
2381         pci_set_master(pdev);
2382
2383         netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter),
2384                                    MAX_TX_QUEUES);
2385         if (!netdev) {
2386                 err = -ENOMEM;
2387                 goto err_alloc_etherdev;
2388         }
2389
2390         SET_NETDEV_DEV(netdev, &pdev->dev);
2391
2392         pci_set_drvdata(pdev, netdev);
2393         adapter = netdev_priv(netdev);
2394
2395         adapter->netdev = netdev;
2396         adapter->pdev = pdev;
2397
2398         hw = &adapter->hw;
2399         hw->back = adapter;
2400
2401         adapter->msg_enable = BIT(DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
2402         adapter->state = __I40EVF_STARTUP;
2403
2404         /* Call save state here because it relies on the adapter struct. */
2405         pci_save_state(pdev);
2406
2407         hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
2408                               pci_resource_len(pdev, 0));
2409         if (!hw->hw_addr) {
2410                 err = -EIO;
2411                 goto err_ioremap;
2412         }
2413         hw->vendor_id = pdev->vendor;
2414         hw->device_id = pdev->device;
2415         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2416         hw->subsystem_vendor_id = pdev->subsystem_vendor;
2417         hw->subsystem_device_id = pdev->subsystem_device;
2418         hw->bus.device = PCI_SLOT(pdev->devfn);
2419         hw->bus.func = PCI_FUNC(pdev->devfn);
2420
2421         INIT_LIST_HEAD(&adapter->mac_filter_list);
2422         INIT_LIST_HEAD(&adapter->vlan_filter_list);
2423
2424         INIT_WORK(&adapter->reset_task, i40evf_reset_task);
2425         INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
2426         INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
2427         INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
2428         schedule_delayed_work(&adapter->init_task,
2429                               msecs_to_jiffies(5 * (pdev->devfn & 0x07)));
2430
2431         return 0;
2432
2433 err_ioremap:
2434         free_netdev(netdev);
2435 err_alloc_etherdev:
2436         pci_release_regions(pdev);
2437 err_pci_reg:
2438 err_dma:
2439         pci_disable_device(pdev);
2440         return err;
2441 }
2442
2443 #ifdef CONFIG_PM
2444 /**
2445  * i40evf_suspend - Power management suspend routine
2446  * @pdev: PCI device information struct
2447  * @state: unused
2448  *
2449  * Called when the system (VM) is entering sleep/suspend.
2450  **/
2451 static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
2452 {
2453         struct net_device *netdev = pci_get_drvdata(pdev);
2454         struct i40evf_adapter *adapter = netdev_priv(netdev);
2455         int retval = 0;
2456
2457         netif_device_detach(netdev);
2458
2459         if (netif_running(netdev)) {
2460                 rtnl_lock();
2461                 i40evf_down(adapter);
2462                 rtnl_unlock();
2463         }
2464         i40evf_free_misc_irq(adapter);
2465         i40evf_reset_interrupt_capability(adapter);
2466
2467         retval = pci_save_state(pdev);
2468         if (retval)
2469                 return retval;
2470
2471         pci_disable_device(pdev);
2472
2473         return 0;
2474 }
2475
2476 /**
2477  * i40evf_resume - Power management resume routine
2478  * @pdev: PCI device information struct
2479  *
2480  * Called when the system (VM) is resumed from sleep/suspend.
2481  **/
2482 static int i40evf_resume(struct pci_dev *pdev)
2483 {
2484         struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
2485         struct net_device *netdev = adapter->netdev;
2486         u32 err;
2487
2488         pci_set_power_state(pdev, PCI_D0);
2489         pci_restore_state(pdev);
2490         /* pci_restore_state clears dev->state_saved so call
2491          * pci_save_state to restore it.
2492          */
2493         pci_save_state(pdev);
2494
2495         err = pci_enable_device_mem(pdev);
2496         if (err) {
2497                 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
2498                 return err;
2499         }
2500         pci_set_master(pdev);
2501
2502         rtnl_lock();
2503         err = i40evf_set_interrupt_capability(adapter);
2504         if (err) {
2505                 rtnl_unlock();
2506                 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
2507                 return err;
2508         }
2509         err = i40evf_request_misc_irq(adapter);
2510         rtnl_unlock();
2511         if (err) {
2512                 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
2513                 return err;
2514         }
2515
2516         schedule_work(&adapter->reset_task);
2517
2518         netif_device_attach(netdev);
2519
2520         return err;
2521 }
2522
2523 #endif /* CONFIG_PM */
2524 /**
2525  * i40evf_remove - Device Removal Routine
2526  * @pdev: PCI device information struct
2527  *
2528  * i40evf_remove is called by the PCI subsystem to alert the driver
2529  * that it should release a PCI device.  The could be caused by a
2530  * Hot-Plug event, or because the driver is going to be removed from
2531  * memory.
2532  **/
2533 static void i40evf_remove(struct pci_dev *pdev)
2534 {
2535         struct net_device *netdev = pci_get_drvdata(pdev);
2536         struct i40evf_adapter *adapter = netdev_priv(netdev);
2537         struct i40evf_mac_filter *f, *ftmp;
2538         struct i40e_hw *hw = &adapter->hw;
2539
2540         cancel_delayed_work_sync(&adapter->init_task);
2541         cancel_work_sync(&adapter->reset_task);
2542
2543         if (adapter->netdev_registered) {
2544                 unregister_netdev(netdev);
2545                 adapter->netdev_registered = false;
2546         }
2547
2548         /* Shut down all the garbage mashers on the detention level */
2549         adapter->state = __I40EVF_REMOVE;
2550         adapter->aq_required = 0;
2551         i40evf_request_reset(adapter);
2552         msleep(20);
2553         /* If the FW isn't responding, kick it once, but only once. */
2554         if (!i40evf_asq_done(hw)) {
2555                 i40evf_request_reset(adapter);
2556                 msleep(20);
2557         }
2558
2559         if (adapter->msix_entries) {
2560                 i40evf_misc_irq_disable(adapter);
2561                 i40evf_free_misc_irq(adapter);
2562                 i40evf_reset_interrupt_capability(adapter);
2563                 i40evf_free_q_vectors(adapter);
2564         }
2565
2566         if (adapter->watchdog_timer.function)
2567                 del_timer_sync(&adapter->watchdog_timer);
2568
2569         flush_scheduled_work();
2570
2571         if (hw->aq.asq.count)
2572                 i40evf_shutdown_adminq(hw);
2573
2574         iounmap(hw->hw_addr);
2575         pci_release_regions(pdev);
2576
2577         i40evf_free_all_tx_resources(adapter);
2578         i40evf_free_all_rx_resources(adapter);
2579         i40evf_free_queues(adapter);
2580         kfree(adapter->vf_res);
2581         /* If we got removed before an up/down sequence, we've got a filter
2582          * hanging out there that we need to get rid of.
2583          */
2584         list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
2585                 list_del(&f->list);
2586                 kfree(f);
2587         }
2588         list_for_each_entry_safe(f, ftmp, &adapter->vlan_filter_list, list) {
2589                 list_del(&f->list);
2590                 kfree(f);
2591         }
2592
2593         free_netdev(netdev);
2594
2595         pci_disable_pcie_error_reporting(pdev);
2596
2597         pci_disable_device(pdev);
2598 }
2599
2600 static struct pci_driver i40evf_driver = {
2601         .name     = i40evf_driver_name,
2602         .id_table = i40evf_pci_tbl,
2603         .probe    = i40evf_probe,
2604         .remove   = i40evf_remove,
2605 #ifdef CONFIG_PM
2606         .suspend  = i40evf_suspend,
2607         .resume   = i40evf_resume,
2608 #endif
2609         .shutdown = i40evf_shutdown,
2610 };
2611
2612 /**
2613  * i40e_init_module - Driver Registration Routine
2614  *
2615  * i40e_init_module is the first routine called when the driver is
2616  * loaded. All it does is register with the PCI subsystem.
2617  **/
2618 static int __init i40evf_init_module(void)
2619 {
2620         int ret;
2621
2622         pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
2623                 i40evf_driver_version);
2624
2625         pr_info("%s\n", i40evf_copyright);
2626
2627         ret = pci_register_driver(&i40evf_driver);
2628         return ret;
2629 }
2630
2631 module_init(i40evf_init_module);
2632
2633 /**
2634  * i40e_exit_module - Driver Exit Cleanup Routine
2635  *
2636  * i40e_exit_module is called just before the driver is removed
2637  * from memory.
2638  **/
2639 static void __exit i40evf_exit_module(void)
2640 {
2641         pci_unregister_driver(&i40evf_driver);
2642 }
2643
2644 module_exit(i40evf_exit_module);
2645
2646 /* i40evf_main.c */