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

   1 /*******************************************************************************
   2  *
   3  * Intel Ethernet Controller XL710 Family Linux Virtual Function Driver
   4  * Copyright(c) 2013 - 2014 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 void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter);
  32 static void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter);
  33 static int i40evf_close(struct net_device *netdev);
  34
  35 char i40evf_driver_name[] = "i40evf";
  36 static const char i40evf_driver_string[] =
  37         "Intel(R) XL710 X710 Virtual Function Network Driver";
  38
  39 #define DRV_VERSION "0.9.23"
  40 const char i40evf_driver_version[] = DRV_VERSION;
  41 static const char i40evf_copyright[] =
  42         "Copyright (c) 2013 - 2014 Intel Corporation.";
  43
  44 /* i40evf_pci_tbl - PCI Device ID Table
  45  *
  46  * Wildcard entries (PCI_ANY_ID) should come last
  47  * Last entry must be all 0s
  48  *
  49  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  50  *   Class, Class Mask, private data (not used) }
  51  */
  52 static DEFINE_PCI_DEVICE_TABLE(i40evf_pci_tbl) = {
  53         {PCI_VDEVICE(INTEL, I40E_DEV_ID_VF), 0},
  54         /* required last entry */
  55         {0, }
  56 };
  57
  58 MODULE_DEVICE_TABLE(pci, i40evf_pci_tbl);
  59
  60 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
  61 MODULE_DESCRIPTION("Intel(R) XL710 X710 Virtual Function Network Driver");
  62 MODULE_LICENSE("GPL");
  63 MODULE_VERSION(DRV_VERSION);
  64
  65 /**
  66  * i40evf_allocate_dma_mem_d - OS specific memory alloc for shared code
  67  * @hw:   pointer to the HW structure
  68  * @mem:  ptr to mem struct to fill out
  69  * @size: size of memory requested
  70  * @alignment: what to align the allocation to
  71  **/
  72 i40e_status i40evf_allocate_dma_mem_d(struct i40e_hw *hw,
  73                                       struct i40e_dma_mem *mem,
  74                                       u64 size, u32 alignment)
  75 {
  76         struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
  77
  78         if (!mem)
  79                 return I40E_ERR_PARAM;
  80
  81         mem->size = ALIGN(size, alignment);
  82         mem->va = dma_alloc_coherent(&adapter->pdev->dev, mem->size,
  83                                      (dma_addr_t *)&mem->pa, GFP_KERNEL);
  84         if (mem->va)
  85                 return 0;
  86         else
  87                 return I40E_ERR_NO_MEMORY;
  88 }
  89
  90 /**
  91  * i40evf_free_dma_mem_d - OS specific memory free for shared code
  92  * @hw:   pointer to the HW structure
  93  * @mem:  ptr to mem struct to free
  94  **/
  95 i40e_status i40evf_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem)
  96 {
  97         struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
  98
  99         if (!mem || !mem->va)
 100                 return I40E_ERR_PARAM;
 101         dma_free_coherent(&adapter->pdev->dev, mem->size,
 102                           mem->va, (dma_addr_t)mem->pa);
 103         return 0;
 104 }
 105
 106 /**
 107  * i40evf_allocate_virt_mem_d - OS specific memory alloc for shared code
 108  * @hw:   pointer to the HW structure
 109  * @mem:  ptr to mem struct to fill out
 110  * @size: size of memory requested
 111  **/
 112 i40e_status i40evf_allocate_virt_mem_d(struct i40e_hw *hw,
 113                                        struct i40e_virt_mem *mem, u32 size)
 114 {
 115         if (!mem)
 116                 return I40E_ERR_PARAM;
 117
 118         mem->size = size;
 119         mem->va = kzalloc(size, GFP_KERNEL);
 120
 121         if (mem->va)
 122                 return 0;
 123         else
 124                 return I40E_ERR_NO_MEMORY;
 125 }
 126
 127 /**
 128  * i40evf_free_virt_mem_d - OS specific memory free for shared code
 129  * @hw:   pointer to the HW structure
 130  * @mem:  ptr to mem struct to free
 131  **/
 132 i40e_status i40evf_free_virt_mem_d(struct i40e_hw *hw,
 133                                    struct i40e_virt_mem *mem)
 134 {
 135         if (!mem)
 136                 return I40E_ERR_PARAM;
 137
 138         /* it's ok to kfree a NULL pointer */
 139         kfree(mem->va);
 140
 141         return 0;
 142 }
 143
 144 /**
 145  * i40evf_debug_d - OS dependent version of debug printing
 146  * @hw:  pointer to the HW structure
 147  * @mask: debug level mask
 148  * @fmt_str: printf-type format description
 149  **/
 150 void i40evf_debug_d(void *hw, u32 mask, char *fmt_str, ...)
 151 {
 152         char buf[512];
 153         va_list argptr;
 154
 155         if (!(mask & ((struct i40e_hw *)hw)->debug_mask))
 156                 return;
 157
 158         va_start(argptr, fmt_str);
 159         vsnprintf(buf, sizeof(buf), fmt_str, argptr);
 160         va_end(argptr);
 161
 162         /* the debug string is already formatted with a newline */
 163         pr_info("%s", buf);
 164 }
 165
 166 /**
 167  * i40evf_tx_timeout - Respond to a Tx Hang
 168  * @netdev: network interface device structure
 169  **/
 170 static void i40evf_tx_timeout(struct net_device *netdev)
 171 {
 172         struct i40evf_adapter *adapter = netdev_priv(netdev);
 173
 174         adapter->tx_timeout_count++;
 175         dev_info(&adapter->pdev->dev, "TX timeout detected.\n");
 176         if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING)) {
 177                 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
 178                 schedule_work(&adapter->reset_task);
 179         }
 180 }
 181
 182 /**
 183  * i40evf_misc_irq_disable - Mask off interrupt generation on the NIC
 184  * @adapter: board private structure
 185  **/
 186 static void i40evf_misc_irq_disable(struct i40evf_adapter *adapter)
 187 {
 188         struct i40e_hw *hw = &adapter->hw;
 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         wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK |
 205                                        I40E_VFINT_DYN_CTL01_ITR_INDX_MASK);
 206         wr32(hw, I40E_VFINT_ICR0_ENA1, I40E_VFINT_ICR0_ENA_ADMINQ_MASK);
 207
 208         /* read flush */
 209         rd32(hw, I40E_VFGEN_RSTAT);
 210 }
 211
 212 /**
 213  * i40evf_irq_disable - Mask off interrupt generation on the NIC
 214  * @adapter: board private structure
 215  **/
 216 static void i40evf_irq_disable(struct i40evf_adapter *adapter)
 217 {
 218         int i;
 219         struct i40e_hw *hw = &adapter->hw;
 220
 221         if (!adapter->msix_entries)
 222                 return;
 223
 224         for (i = 1; i < adapter->num_msix_vectors; i++) {
 225                 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), 0);
 226                 synchronize_irq(adapter->msix_entries[i].vector);
 227         }
 228         /* read flush */
 229         rd32(hw, I40E_VFGEN_RSTAT);
 230
 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 & (1 << (i - 1))) {
 245                         wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1),
 246                              I40E_VFINT_DYN_CTLN1_INTENA_MASK |
 247                              I40E_VFINT_DYN_CTLN_CLEARPBA_MASK);
 248                 }
 249         }
 250 }
 251
 252 /**
 253  * i40evf_fire_sw_int - Generate SW interrupt for specified vectors
 254  * @adapter: board private structure
 255  * @mask: bitmap of vectors to trigger
 256  **/
 257 static void i40evf_fire_sw_int(struct i40evf_adapter *adapter,
 258                                             u32 mask)
 259 {
 260         struct i40e_hw *hw = &adapter->hw;
 261         int i;
 262         uint32_t dyn_ctl;
 263
 264         for (i = 1; i < adapter->num_msix_vectors; i++) {
 265                 if (mask & (1 << i)) {
 266                         dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTLN1(i - 1));
 267                         dyn_ctl |= I40E_VFINT_DYN_CTLN_SWINT_TRIG_MASK |
 268                                    I40E_VFINT_DYN_CTLN_CLEARPBA_MASK;
 269                         wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), dyn_ctl);
 270                 }
 271         }
 272 }
 273
 274 /**
 275  * i40evf_irq_enable - Enable default interrupt generation settings
 276  * @adapter: board private structure
 277  **/
 278 void i40evf_irq_enable(struct i40evf_adapter *adapter, bool flush)
 279 {
 280         struct i40e_hw *hw = &adapter->hw;
 281
 282         i40evf_irq_enable_queues(adapter, ~0);
 283
 284         if (flush)
 285                 rd32(hw, I40E_VFGEN_RSTAT);
 286 }
 287
 288 /**
 289  * i40evf_msix_aq - Interrupt handler for vector 0
 290  * @irq: interrupt number
 291  * @data: pointer to netdev
 292  **/
 293 static irqreturn_t i40evf_msix_aq(int irq, void *data)
 294 {
 295         struct net_device *netdev = data;
 296         struct i40evf_adapter *adapter = netdev_priv(netdev);
 297         struct i40e_hw *hw = &adapter->hw;
 298         u32 val;
 299         u32 ena_mask;
 300
 301         /* handle non-queue interrupts */
 302         val = rd32(hw, I40E_VFINT_ICR01);
 303         ena_mask = rd32(hw, I40E_VFINT_ICR0_ENA1);
 304
 305
 306         val = rd32(hw, I40E_VFINT_DYN_CTL01);
 307         val = val | I40E_PFINT_DYN_CTL0_CLEARPBA_MASK;
 308         wr32(hw, I40E_VFINT_DYN_CTL01, val);
 309
 310         /* re-enable interrupt causes */
 311         wr32(hw, I40E_VFINT_ICR0_ENA1, ena_mask);
 312         wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK);
 313
 314         /* schedule work on the private workqueue */
 315         schedule_work(&adapter->adminq_task);
 316
 317         return IRQ_HANDLED;
 318 }
 319
 320 /**
 321  * i40evf_msix_clean_rings - MSIX mode Interrupt Handler
 322  * @irq: interrupt number
 323  * @data: pointer to a q_vector
 324  **/
 325 static irqreturn_t i40evf_msix_clean_rings(int irq, void *data)
 326 {
 327         struct i40e_q_vector *q_vector = data;
 328
 329         if (!q_vector->tx.ring && !q_vector->rx.ring)
 330                 return IRQ_HANDLED;
 331
 332         napi_schedule(&q_vector->napi);
 333
 334         return IRQ_HANDLED;
 335 }
 336
 337 /**
 338  * i40evf_map_vector_to_rxq - associate irqs with rx queues
 339  * @adapter: board private structure
 340  * @v_idx: interrupt number
 341  * @r_idx: queue number
 342  **/
 343 static void
 344 i40evf_map_vector_to_rxq(struct i40evf_adapter *adapter, int v_idx, int r_idx)
 345 {
 346         struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
 347         struct i40e_ring *rx_ring = adapter->rx_rings[r_idx];
 348
 349         rx_ring->q_vector = q_vector;
 350         rx_ring->next = q_vector->rx.ring;
 351         rx_ring->vsi = &adapter->vsi;
 352         q_vector->rx.ring = rx_ring;
 353         q_vector->rx.count++;
 354         q_vector->rx.latency_range = I40E_LOW_LATENCY;
 355 }
 356
 357 /**
 358  * i40evf_map_vector_to_txq - associate irqs with tx queues
 359  * @adapter: board private structure
 360  * @v_idx: interrupt number
 361  * @t_idx: queue number
 362  **/
 363 static void
 364 i40evf_map_vector_to_txq(struct i40evf_adapter *adapter, int v_idx, int t_idx)
 365 {
 366         struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
 367         struct i40e_ring *tx_ring = adapter->tx_rings[t_idx];
 368
 369         tx_ring->q_vector = q_vector;
 370         tx_ring->next = q_vector->tx.ring;
 371         tx_ring->vsi = &adapter->vsi;
 372         q_vector->tx.ring = tx_ring;
 373         q_vector->tx.count++;
 374         q_vector->tx.latency_range = I40E_LOW_LATENCY;
 375         q_vector->num_ringpairs++;
 376         q_vector->ring_mask |= (1 << t_idx);
 377 }
 378
 379 /**
 380  * i40evf_map_rings_to_vectors - Maps descriptor rings to vectors
 381  * @adapter: board private structure to initialize
 382  *
 383  * This function maps descriptor rings to the queue-specific vectors
 384  * we were allotted through the MSI-X enabling code.  Ideally, we'd have
 385  * one vector per ring/queue, but on a constrained vector budget, we
 386  * group the rings as "efficiently" as possible.  You would add new
 387  * mapping configurations in here.
 388  **/
 389 static int i40evf_map_rings_to_vectors(struct i40evf_adapter *adapter)
 390 {
 391         int q_vectors;
 392         int v_start = 0;
 393         int rxr_idx = 0, txr_idx = 0;
 394         int rxr_remaining = adapter->vsi_res->num_queue_pairs;
 395         int txr_remaining = adapter->vsi_res->num_queue_pairs;
 396         int i, j;
 397         int rqpv, tqpv;
 398         int err = 0;
 399
 400         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 401
 402         /* The ideal configuration...
 403          * We have enough vectors to map one per queue.
 404          */
 405         if (q_vectors == (rxr_remaining * 2)) {
 406                 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
 407                         i40evf_map_vector_to_rxq(adapter, v_start, rxr_idx);
 408
 409                 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
 410                         i40evf_map_vector_to_txq(adapter, v_start, txr_idx);
 411                 goto out;
 412         }
 413
 414         /* If we don't have enough vectors for a 1-to-1
 415          * mapping, we'll have to group them so there are
 416          * multiple queues per vector.
 417          * Re-adjusting *qpv takes care of the remainder.
 418          */
 419         for (i = v_start; i < q_vectors; i++) {
 420                 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
 421                 for (j = 0; j < rqpv; j++) {
 422                         i40evf_map_vector_to_rxq(adapter, i, rxr_idx);
 423                         rxr_idx++;
 424                         rxr_remaining--;
 425                 }
 426         }
 427         for (i = v_start; i < q_vectors; i++) {
 428                 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
 429                 for (j = 0; j < tqpv; j++) {
 430                         i40evf_map_vector_to_txq(adapter, i, txr_idx);
 431                         txr_idx++;
 432                         txr_remaining--;
 433                 }
 434         }
 435
 436 out:
 437         adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
 438
 439         return err;
 440 }
 441
 442 /**
 443  * i40evf_request_traffic_irqs - Initialize MSI-X interrupts
 444  * @adapter: board private structure
 445  *
 446  * Allocates MSI-X vectors for tx and rx handling, and requests
 447  * interrupts from the kernel.
 448  **/
 449 static int
 450 i40evf_request_traffic_irqs(struct i40evf_adapter *adapter, char *basename)
 451 {
 452         int vector, err, q_vectors;
 453         int rx_int_idx = 0, tx_int_idx = 0;
 454
 455         i40evf_irq_disable(adapter);
 456         /* Decrement for Other and TCP Timer vectors */
 457         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 458
 459         for (vector = 0; vector < q_vectors; vector++) {
 460                 struct i40e_q_vector *q_vector = adapter->q_vector[vector];
 461
 462                 if (q_vector->tx.ring && q_vector->rx.ring) {
 463                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 464                                  "i40evf-%s-%s-%d", basename,
 465                                  "TxRx", rx_int_idx++);
 466                         tx_int_idx++;
 467                 } else if (q_vector->rx.ring) {
 468                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 469                                  "i40evf-%s-%s-%d", basename,
 470                                  "rx", rx_int_idx++);
 471                 } else if (q_vector->tx.ring) {
 472                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 473                                  "i40evf-%s-%s-%d", basename,
 474                                  "tx", tx_int_idx++);
 475                 } else {
 476                         /* skip this unused q_vector */
 477                         continue;
 478                 }
 479                 err = request_irq(
 480                         adapter->msix_entries[vector + NONQ_VECS].vector,
 481                         i40evf_msix_clean_rings,
 482                         0,
 483                         q_vector->name,
 484                         q_vector);
 485                 if (err) {
 486                         dev_info(&adapter->pdev->dev,
 487                                  "%s: request_irq failed, error: %d\n",
 488                                 __func__, err);
 489                         goto free_queue_irqs;
 490                 }
 491                 /* assign the mask for this irq */
 492                 irq_set_affinity_hint(
 493                         adapter->msix_entries[vector + NONQ_VECS].vector,
 494                         q_vector->affinity_mask);
 495         }
 496
 497         return 0;
 498
 499 free_queue_irqs:
 500         while (vector) {
 501                 vector--;
 502                 irq_set_affinity_hint(
 503                         adapter->msix_entries[vector + NONQ_VECS].vector,
 504                         NULL);
 505                 free_irq(adapter->msix_entries[vector + NONQ_VECS].vector,
 506                          adapter->q_vector[vector]);
 507         }
 508         return err;
 509 }
 510
 511 /**
 512  * i40evf_request_misc_irq - Initialize MSI-X interrupts
 513  * @adapter: board private structure
 514  *
 515  * Allocates MSI-X vector 0 and requests interrupts from the kernel. This
 516  * vector is only for the admin queue, and stays active even when the netdev
 517  * is closed.
 518  **/
 519 static int i40evf_request_misc_irq(struct i40evf_adapter *adapter)
 520 {
 521         struct net_device *netdev = adapter->netdev;
 522         int err;
 523
 524         sprintf(adapter->misc_vector_name, "i40evf:mbx");
 525         err = request_irq(adapter->msix_entries[0].vector,
 526                           &i40evf_msix_aq, 0,
 527                           adapter->misc_vector_name, netdev);
 528         if (err) {
 529                 dev_err(&adapter->pdev->dev,
 530                         "request_irq for %s failed: %d\n",
 531                         adapter->misc_vector_name, err);
 532                 free_irq(adapter->msix_entries[0].vector, netdev);
 533         }
 534         return err;
 535 }
 536
 537 /**
 538  * i40evf_free_traffic_irqs - Free MSI-X interrupts
 539  * @adapter: board private structure
 540  *
 541  * Frees all MSI-X vectors other than 0.
 542  **/
 543 static void i40evf_free_traffic_irqs(struct i40evf_adapter *adapter)
 544 {
 545         int i;
 546         int q_vectors;
 547         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 548
 549         for (i = 0; i < q_vectors; i++) {
 550                 irq_set_affinity_hint(adapter->msix_entries[i+1].vector,
 551                                       NULL);
 552                 free_irq(adapter->msix_entries[i+1].vector,
 553                          adapter->q_vector[i]);
 554         }
 555 }
 556
 557 /**
 558  * i40evf_free_misc_irq - Free MSI-X miscellaneous vector
 559  * @adapter: board private structure
 560  *
 561  * Frees MSI-X vector 0.
 562  **/
 563 static void i40evf_free_misc_irq(struct i40evf_adapter *adapter)
 564 {
 565         struct net_device *netdev = adapter->netdev;
 566
 567         free_irq(adapter->msix_entries[0].vector, netdev);
 568 }
 569
 570 /**
 571  * i40evf_configure_tx - Configure Transmit Unit after Reset
 572  * @adapter: board private structure
 573  *
 574  * Configure the Tx unit of the MAC after a reset.
 575  **/
 576 static void i40evf_configure_tx(struct i40evf_adapter *adapter)
 577 {
 578         struct i40e_hw *hw = &adapter->hw;
 579         int i;
 580         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
 581                 adapter->tx_rings[i]->tail = hw->hw_addr + I40E_QTX_TAIL1(i);
 582 }
 583
 584 /**
 585  * i40evf_configure_rx - Configure Receive Unit after Reset
 586  * @adapter: board private structure
 587  *
 588  * Configure the Rx unit of the MAC after a reset.
 589  **/
 590 static void i40evf_configure_rx(struct i40evf_adapter *adapter)
 591 {
 592         struct i40e_hw *hw = &adapter->hw;
 593         struct net_device *netdev = adapter->netdev;
 594         int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
 595         int i;
 596         int rx_buf_len;
 597
 598
 599         adapter->flags &= ~I40EVF_FLAG_RX_PS_CAPABLE;
 600         adapter->flags |= I40EVF_FLAG_RX_1BUF_CAPABLE;
 601
 602         /* Decide whether to use packet split mode or not */
 603         if (netdev->mtu > ETH_DATA_LEN) {
 604                 if (adapter->flags & I40EVF_FLAG_RX_PS_CAPABLE)
 605                         adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
 606                 else
 607                         adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
 608         } else {
 609                 if (adapter->flags & I40EVF_FLAG_RX_1BUF_CAPABLE)
 610                         adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
 611                 else
 612                         adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
 613         }
 614
 615         /* Set the RX buffer length according to the mode */
 616         if (adapter->flags & I40EVF_FLAG_RX_PS_ENABLED) {
 617                 rx_buf_len = I40E_RX_HDR_SIZE;
 618         } else {
 619                 if (netdev->mtu <= ETH_DATA_LEN)
 620                         rx_buf_len = I40EVF_RXBUFFER_2048;
 621                 else
 622                         rx_buf_len = ALIGN(max_frame, 1024);
 623         }
 624
 625         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
 626                 adapter->rx_rings[i]->tail = hw->hw_addr + I40E_QRX_TAIL1(i);
 627                 adapter->rx_rings[i]->rx_buf_len = rx_buf_len;
 628         }
 629 }
 630
 631 /**
 632  * i40evf_find_vlan - Search filter list for specific vlan filter
 633  * @adapter: board private structure
 634  * @vlan: vlan tag
 635  *
 636  * Returns ptr to the filter object or NULL
 637  **/
 638 static struct
 639 i40evf_vlan_filter *i40evf_find_vlan(struct i40evf_adapter *adapter, u16 vlan)
 640 {
 641         struct i40evf_vlan_filter *f;
 642
 643         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
 644                 if (vlan == f->vlan)
 645                         return f;
 646         }
 647         return NULL;
 648 }
 649
 650 /**
 651  * i40evf_add_vlan - Add a vlan filter to the list
 652  * @adapter: board private structure
 653  * @vlan: VLAN tag
 654  *
 655  * Returns ptr to the filter object or NULL when no memory available.
 656  **/
 657 static struct
 658 i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan)
 659 {
 660         struct i40evf_vlan_filter *f;
 661
 662         f = i40evf_find_vlan(adapter, vlan);
 663         if (NULL == f) {
 664                 f = kzalloc(sizeof(*f), GFP_ATOMIC);
 665                 if (NULL == f) {
 666                         dev_info(&adapter->pdev->dev,
 667                                  "%s: no memory for new VLAN filter\n",
 668                                  __func__);
 669                         return NULL;
 670                 }
 671                 f->vlan = vlan;
 672
 673                 INIT_LIST_HEAD(&f->list);
 674                 list_add(&f->list, &adapter->vlan_filter_list);
 675                 f->add = true;
 676                 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
 677         }
 678
 679         return f;
 680 }
 681
 682 /**
 683  * i40evf_del_vlan - Remove a vlan filter from the list
 684  * @adapter: board private structure
 685  * @vlan: VLAN tag
 686  **/
 687 static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan)
 688 {
 689         struct i40evf_vlan_filter *f;
 690
 691         f = i40evf_find_vlan(adapter, vlan);
 692         if (f) {
 693                 f->remove = true;
 694                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
 695         }
 696         return;
 697 }
 698
 699 /**
 700  * i40evf_vlan_rx_add_vid - Add a VLAN filter to a device
 701  * @netdev: network device struct
 702  * @vid: VLAN tag
 703  **/
 704 static int i40evf_vlan_rx_add_vid(struct net_device *netdev,
 705                          __always_unused __be16 proto, u16 vid)
 706 {
 707         struct i40evf_adapter *adapter = netdev_priv(netdev);
 708
 709         if (i40evf_add_vlan(adapter, vid) == NULL)
 710                 return -ENOMEM;
 711         return 0;
 712 }
 713
 714 /**
 715  * i40evf_vlan_rx_kill_vid - Remove a VLAN filter from a device
 716  * @netdev: network device struct
 717  * @vid: VLAN tag
 718  **/
 719 static int i40evf_vlan_rx_kill_vid(struct net_device *netdev,
 720                           __always_unused __be16 proto, u16 vid)
 721 {
 722         struct i40evf_adapter *adapter = netdev_priv(netdev);
 723
 724         i40evf_del_vlan(adapter, vid);
 725         return 0;
 726 }
 727
 728 /**
 729  * i40evf_find_filter - Search filter list for specific mac filter
 730  * @adapter: board private structure
 731  * @macaddr: the MAC address
 732  *
 733  * Returns ptr to the filter object or NULL
 734  **/
 735 static struct
 736 i40evf_mac_filter *i40evf_find_filter(struct i40evf_adapter *adapter,
 737                                       u8 *macaddr)
 738 {
 739         struct i40evf_mac_filter *f;
 740
 741         if (!macaddr)
 742                 return NULL;
 743
 744         list_for_each_entry(f, &adapter->mac_filter_list, list) {
 745                 if (ether_addr_equal(macaddr, f->macaddr))
 746                         return f;
 747         }
 748         return NULL;
 749 }
 750
 751 /**
 752  * i40e_add_filter - Add a mac filter to the filter list
 753  * @adapter: board private structure
 754  * @macaddr: the MAC address
 755  *
 756  * Returns ptr to the filter object or NULL when no memory available.
 757  **/
 758 static struct
 759 i40evf_mac_filter *i40evf_add_filter(struct i40evf_adapter *adapter,
 760                                      u8 *macaddr)
 761 {
 762         struct i40evf_mac_filter *f;
 763
 764         if (!macaddr)
 765                 return NULL;
 766
 767         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 768                                 &adapter->crit_section))
 769                 mdelay(1);
 770
 771         f = i40evf_find_filter(adapter, macaddr);
 772         if (NULL == f) {
 773                 f = kzalloc(sizeof(*f), GFP_ATOMIC);
 774                 if (NULL == f) {
 775                         dev_info(&adapter->pdev->dev,
 776                                  "%s: no memory for new filter\n", __func__);
 777                         clear_bit(__I40EVF_IN_CRITICAL_TASK,
 778                                   &adapter->crit_section);
 779                         return NULL;
 780                 }
 781
 782                 memcpy(f->macaddr, macaddr, ETH_ALEN);
 783
 784                 list_add(&f->list, &adapter->mac_filter_list);
 785                 f->add = true;
 786                 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
 787         }
 788
 789         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 790         return f;
 791 }
 792
 793 /**
 794  * i40evf_set_mac - NDO callback to set port mac address
 795  * @netdev: network interface device structure
 796  * @p: pointer to an address structure
 797  *
 798  * Returns 0 on success, negative on failure
 799  **/
 800 static int i40evf_set_mac(struct net_device *netdev, void *p)
 801 {
 802         struct i40evf_adapter *adapter = netdev_priv(netdev);
 803         struct i40e_hw *hw = &adapter->hw;
 804         struct i40evf_mac_filter *f;
 805         struct sockaddr *addr = p;
 806
 807         if (!is_valid_ether_addr(addr->sa_data))
 808                 return -EADDRNOTAVAIL;
 809
 810         if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
 811                 return 0;
 812
 813         f = i40evf_add_filter(adapter, addr->sa_data);
 814         if (f) {
 815                 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
 816                 memcpy(netdev->dev_addr, adapter->hw.mac.addr,
 817                        netdev->addr_len);
 818         }
 819
 820         return (f == NULL) ? -ENOMEM : 0;
 821 }
 822
 823 /**
 824  * i40evf_set_rx_mode - NDO callback to set the netdev filters
 825  * @netdev: network interface device structure
 826  **/
 827 static void i40evf_set_rx_mode(struct net_device *netdev)
 828 {
 829         struct i40evf_adapter *adapter = netdev_priv(netdev);
 830         struct i40evf_mac_filter *f, *ftmp;
 831         struct netdev_hw_addr *uca;
 832         struct netdev_hw_addr *mca;
 833
 834         /* add addr if not already in the filter list */
 835         netdev_for_each_uc_addr(uca, netdev) {
 836                 i40evf_add_filter(adapter, uca->addr);
 837         }
 838         netdev_for_each_mc_addr(mca, netdev) {
 839                 i40evf_add_filter(adapter, mca->addr);
 840         }
 841
 842         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 843                                 &adapter->crit_section))
 844                 mdelay(1);
 845         /* remove filter if not in netdev list */
 846         list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
 847                 bool found = false;
 848
 849                 if (f->macaddr[0] & 0x01) {
 850                         netdev_for_each_mc_addr(mca, netdev) {
 851                                 if (ether_addr_equal(mca->addr, f->macaddr)) {
 852                                         found = true;
 853                                         break;
 854                                 }
 855                         }
 856                 } else {
 857                         netdev_for_each_uc_addr(uca, netdev) {
 858                                 if (ether_addr_equal(uca->addr, f->macaddr)) {
 859                                         found = true;
 860                                         break;
 861                                 }
 862                         }
 863                 }
 864                 if (found) {
 865                         f->remove = true;
 866                         adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
 867                 }
 868         }
 869         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 870 }
 871
 872 /**
 873  * i40evf_napi_enable_all - enable NAPI on all queue vectors
 874  * @adapter: board private structure
 875  **/
 876 static void i40evf_napi_enable_all(struct i40evf_adapter *adapter)
 877 {
 878         int q_idx;
 879         struct i40e_q_vector *q_vector;
 880         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 881
 882         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
 883                 struct napi_struct *napi;
 884                 q_vector = adapter->q_vector[q_idx];
 885                 napi = &q_vector->napi;
 886                 napi_enable(napi);
 887         }
 888 }
 889
 890 /**
 891  * i40evf_napi_disable_all - disable NAPI on all queue vectors
 892  * @adapter: board private structure
 893  **/
 894 static void i40evf_napi_disable_all(struct i40evf_adapter *adapter)
 895 {
 896         int q_idx;
 897         struct i40e_q_vector *q_vector;
 898         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 899
 900         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
 901                 q_vector = adapter->q_vector[q_idx];
 902                 napi_disable(&q_vector->napi);
 903         }
 904 }
 905
 906 /**
 907  * i40evf_configure - set up transmit and receive data structures
 908  * @adapter: board private structure
 909  **/
 910 static void i40evf_configure(struct i40evf_adapter *adapter)
 911 {
 912         struct net_device *netdev = adapter->netdev;
 913         int i;
 914
 915         i40evf_set_rx_mode(netdev);
 916
 917         i40evf_configure_tx(adapter);
 918         i40evf_configure_rx(adapter);
 919         adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
 920
 921         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
 922                 struct i40e_ring *ring = adapter->rx_rings[i];
 923                 i40evf_alloc_rx_buffers(ring, ring->count);
 924                 ring->next_to_use = ring->count - 1;
 925                 writel(ring->next_to_use, ring->tail);
 926         }
 927 }
 928
 929 /**
 930  * i40evf_up_complete - Finish the last steps of bringing up a connection
 931  * @adapter: board private structure
 932  **/
 933 static int i40evf_up_complete(struct i40evf_adapter *adapter)
 934 {
 935         adapter->state = __I40EVF_RUNNING;
 936         clear_bit(__I40E_DOWN, &adapter->vsi.state);
 937
 938         i40evf_napi_enable_all(adapter);
 939
 940         adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES;
 941         mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
 942         return 0;
 943 }
 944
 945 /**
 946  * i40evf_clean_all_rx_rings - Free Rx Buffers for all queues
 947  * @adapter: board private structure
 948  **/
 949 static void i40evf_clean_all_rx_rings(struct i40evf_adapter *adapter)
 950 {
 951         int i;
 952
 953         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
 954                 i40evf_clean_rx_ring(adapter->rx_rings[i]);
 955 }
 956
 957 /**
 958  * i40evf_clean_all_tx_rings - Free Tx Buffers for all queues
 959  * @adapter: board private structure
 960  **/
 961 static void i40evf_clean_all_tx_rings(struct i40evf_adapter *adapter)
 962 {
 963         int i;
 964
 965         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
 966                 i40evf_clean_tx_ring(adapter->tx_rings[i]);
 967 }
 968
 969 /**
 970  * i40e_down - Shutdown the connection processing
 971  * @adapter: board private structure
 972  **/
 973 void i40evf_down(struct i40evf_adapter *adapter)
 974 {
 975         struct net_device *netdev = adapter->netdev;
 976         struct i40evf_mac_filter *f;
 977
 978         /* remove all MAC filters */
 979         list_for_each_entry(f, &adapter->mac_filter_list, list) {
 980                 f->remove = true;
 981         }
 982         /* remove all VLAN filters */
 983         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
 984                 f->remove = true;
 985         }
 986         if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) &&
 987             adapter->state != __I40EVF_RESETTING) {
 988                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
 989                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
 990                 /* disable receives */
 991                 adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
 992                 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
 993                 msleep(20);
 994         }
 995         netif_tx_disable(netdev);
 996
 997         netif_tx_stop_all_queues(netdev);
 998
 999         i40evf_irq_disable(adapter);
1000
1001         i40evf_napi_disable_all(adapter);
1002
1003         netif_carrier_off(netdev);
1004
1005         i40evf_clean_all_tx_rings(adapter);
1006         i40evf_clean_all_rx_rings(adapter);
1007 }
1008
1009 /**
1010  * i40evf_acquire_msix_vectors - Setup the MSIX capability
1011  * @adapter: board private structure
1012  * @vectors: number of vectors to request
1013  *
1014  * Work with the OS to set up the MSIX vectors needed.
1015  *
1016  * Returns 0 on success, negative on failure
1017  **/
1018 static int
1019 i40evf_acquire_msix_vectors(struct i40evf_adapter *adapter, int vectors)
1020 {
1021         int err, vector_threshold;
1022
1023         /* We'll want at least 3 (vector_threshold):
1024          * 0) Other (Admin Queue and link, mostly)
1025          * 1) TxQ[0] Cleanup
1026          * 2) RxQ[0] Cleanup
1027          */
1028         vector_threshold = MIN_MSIX_COUNT;
1029
1030         /* The more we get, the more we will assign to Tx/Rx Cleanup
1031          * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1032          * Right now, we simply care about how many we'll get; we'll
1033          * set them up later while requesting irq's.
1034          */
1035         err = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
1036                                     vector_threshold, vectors);
1037         if (err < 0) {
1038                 dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts.\n");
1039                 kfree(adapter->msix_entries);
1040                 adapter->msix_entries = NULL;
1041                 return err;
1042         }
1043
1044         /* Adjust for only the vectors we'll use, which is minimum
1045          * of max_msix_q_vectors + NONQ_VECS, or the number of
1046          * vectors we were allocated.
1047          */
1048         adapter->num_msix_vectors = err;
1049         return 0;
1050 }
1051
1052 /**
1053  * i40evf_free_queues - Free memory for all rings
1054  * @adapter: board private structure to initialize
1055  *
1056  * Free all of the memory associated with queue pairs.
1057  **/
1058 static void i40evf_free_queues(struct i40evf_adapter *adapter)
1059 {
1060         int i;
1061
1062         if (!adapter->vsi_res)
1063                 return;
1064         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1065                 if (adapter->tx_rings[i])
1066                         kfree_rcu(adapter->tx_rings[i], rcu);
1067                 adapter->tx_rings[i] = NULL;
1068                 adapter->rx_rings[i] = NULL;
1069         }
1070 }
1071
1072 /**
1073  * i40evf_alloc_queues - Allocate memory for all rings
1074  * @adapter: board private structure to initialize
1075  *
1076  * We allocate one ring per queue at run-time since we don't know the
1077  * number of queues at compile-time.  The polling_netdev array is
1078  * intended for Multiqueue, but should work fine with a single queue.
1079  **/
1080 static int i40evf_alloc_queues(struct i40evf_adapter *adapter)
1081 {
1082         int i;
1083
1084         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1085                 struct i40e_ring *tx_ring;
1086                 struct i40e_ring *rx_ring;
1087
1088                 tx_ring = kzalloc(sizeof(struct i40e_ring) * 2, GFP_KERNEL);
1089                 if (!tx_ring)
1090                         goto err_out;
1091
1092                 tx_ring->queue_index = i;
1093                 tx_ring->netdev = adapter->netdev;
1094                 tx_ring->dev = &adapter->pdev->dev;
1095                 tx_ring->count = I40EVF_DEFAULT_TXD;
1096                 adapter->tx_rings[i] = tx_ring;
1097
1098                 rx_ring = &tx_ring[1];
1099                 rx_ring->queue_index = i;
1100                 rx_ring->netdev = adapter->netdev;
1101                 rx_ring->dev = &adapter->pdev->dev;
1102                 rx_ring->count = I40EVF_DEFAULT_RXD;
1103                 adapter->rx_rings[i] = rx_ring;
1104         }
1105
1106         return 0;
1107
1108 err_out:
1109         i40evf_free_queues(adapter);
1110         return -ENOMEM;
1111 }
1112
1113 /**
1114  * i40evf_set_interrupt_capability - set MSI-X or FAIL if not supported
1115  * @adapter: board private structure to initialize
1116  *
1117  * Attempt to configure the interrupts using the best available
1118  * capabilities of the hardware and the kernel.
1119  **/
1120 static int i40evf_set_interrupt_capability(struct i40evf_adapter *adapter)
1121 {
1122         int vector, v_budget;
1123         int pairs = 0;
1124         int err = 0;
1125
1126         if (!adapter->vsi_res) {
1127                 err = -EIO;
1128                 goto out;
1129         }
1130         pairs = adapter->vsi_res->num_queue_pairs;
1131
1132         /* It's easy to be greedy for MSI-X vectors, but it really
1133          * doesn't do us much good if we have a lot more vectors
1134          * than CPU's.  So let's be conservative and only ask for
1135          * (roughly) twice the number of vectors as there are CPU's.
1136          */
1137         v_budget = min_t(int, pairs, (int)(num_online_cpus() * 2)) + NONQ_VECS;
1138         v_budget = min_t(int, v_budget, (int)adapter->vf_res->max_vectors);
1139
1140         /* A failure in MSI-X entry allocation isn't fatal, but it does
1141          * mean we disable MSI-X capabilities of the adapter.
1142          */
1143         adapter->msix_entries = kcalloc(v_budget,
1144                                         sizeof(struct msix_entry), GFP_KERNEL);
1145         if (!adapter->msix_entries) {
1146                 err = -ENOMEM;
1147                 goto out;
1148         }
1149
1150         for (vector = 0; vector < v_budget; vector++)
1151                 adapter->msix_entries[vector].entry = vector;
1152
1153         i40evf_acquire_msix_vectors(adapter, v_budget);
1154
1155 out:
1156         adapter->netdev->real_num_tx_queues = pairs;
1157         return err;
1158 }
1159
1160 /**
1161  * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors
1162  * @adapter: board private structure to initialize
1163  *
1164  * We allocate one q_vector per queue interrupt.  If allocation fails we
1165  * return -ENOMEM.
1166  **/
1167 static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
1168 {
1169         int q_idx, num_q_vectors;
1170         struct i40e_q_vector *q_vector;
1171
1172         num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1173
1174         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1175                 q_vector = kzalloc(sizeof(struct i40e_q_vector), GFP_KERNEL);
1176                 if (!q_vector)
1177                         goto err_out;
1178                 q_vector->adapter = adapter;
1179                 q_vector->vsi = &adapter->vsi;
1180                 q_vector->v_idx = q_idx;
1181                 netif_napi_add(adapter->netdev, &q_vector->napi,
1182                                        i40evf_napi_poll, 64);
1183                 adapter->q_vector[q_idx] = q_vector;
1184         }
1185
1186         return 0;
1187
1188 err_out:
1189         while (q_idx) {
1190                 q_idx--;
1191                 q_vector = adapter->q_vector[q_idx];
1192                 netif_napi_del(&q_vector->napi);
1193                 kfree(q_vector);
1194                 adapter->q_vector[q_idx] = NULL;
1195         }
1196         return -ENOMEM;
1197 }
1198
1199 /**
1200  * i40evf_free_q_vectors - Free memory allocated for interrupt vectors
1201  * @adapter: board private structure to initialize
1202  *
1203  * This function frees the memory allocated to the q_vectors.  In addition if
1204  * NAPI is enabled it will delete any references to the NAPI struct prior
1205  * to freeing the q_vector.
1206  **/
1207 static void i40evf_free_q_vectors(struct i40evf_adapter *adapter)
1208 {
1209         int q_idx, num_q_vectors;
1210         int napi_vectors;
1211
1212         num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1213         napi_vectors = adapter->vsi_res->num_queue_pairs;
1214
1215         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1216                 struct i40e_q_vector *q_vector = adapter->q_vector[q_idx];
1217
1218                 adapter->q_vector[q_idx] = NULL;
1219                 if (q_idx < napi_vectors)
1220                         netif_napi_del(&q_vector->napi);
1221                 kfree(q_vector);
1222         }
1223 }
1224
1225 /**
1226  * i40evf_reset_interrupt_capability - Reset MSIX setup
1227  * @adapter: board private structure
1228  *
1229  **/
1230 void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
1231 {
1232         pci_disable_msix(adapter->pdev);
1233         kfree(adapter->msix_entries);
1234         adapter->msix_entries = NULL;
1235
1236         return;
1237 }
1238
1239 /**
1240  * i40evf_init_interrupt_scheme - Determine if MSIX is supported and init
1241  * @adapter: board private structure to initialize
1242  *
1243  **/
1244 int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter)
1245 {
1246         int err;
1247
1248         err = i40evf_set_interrupt_capability(adapter);
1249         if (err) {
1250                 dev_err(&adapter->pdev->dev,
1251                         "Unable to setup interrupt capabilities\n");
1252                 goto err_set_interrupt;
1253         }
1254
1255         err = i40evf_alloc_q_vectors(adapter);
1256         if (err) {
1257                 dev_err(&adapter->pdev->dev,
1258                         "Unable to allocate memory for queue vectors\n");
1259                 goto err_alloc_q_vectors;
1260         }
1261
1262         err = i40evf_alloc_queues(adapter);
1263         if (err) {
1264                 dev_err(&adapter->pdev->dev,
1265                         "Unable to allocate memory for queues\n");
1266                 goto err_alloc_queues;
1267         }
1268
1269         dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
1270                 (adapter->vsi_res->num_queue_pairs > 1) ? "Enabled" :
1271                 "Disabled", adapter->vsi_res->num_queue_pairs);
1272
1273         return 0;
1274 err_alloc_queues:
1275         i40evf_free_q_vectors(adapter);
1276 err_alloc_q_vectors:
1277         i40evf_reset_interrupt_capability(adapter);
1278 err_set_interrupt:
1279         return err;
1280 }
1281
1282 /**
1283  * i40evf_watchdog_timer - Periodic call-back timer
1284  * @data: pointer to adapter disguised as unsigned long
1285  **/
1286 static void i40evf_watchdog_timer(unsigned long data)
1287 {
1288         struct i40evf_adapter *adapter = (struct i40evf_adapter *)data;
1289         schedule_work(&adapter->watchdog_task);
1290         /* timer will be rescheduled in watchdog task */
1291 }
1292
1293 /**
1294  * i40evf_watchdog_task - Periodic call-back task
1295  * @work: pointer to work_struct
1296  **/
1297 static void i40evf_watchdog_task(struct work_struct *work)
1298 {
1299         struct i40evf_adapter *adapter = container_of(work,
1300                                           struct i40evf_adapter,
1301                                           watchdog_task);
1302         struct i40e_hw *hw = &adapter->hw;
1303
1304         if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
1305                 goto restart_watchdog;
1306
1307         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1308                 if ((rd32(hw, I40E_VFGEN_RSTAT) & 0x3) == I40E_VFR_VFACTIVE) {
1309                         /* A chance for redemption! */
1310                         dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
1311                         adapter->state = __I40EVF_STARTUP;
1312                         adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1313                         schedule_delayed_work(&adapter->init_task, 10);
1314                         clear_bit(__I40EVF_IN_CRITICAL_TASK,
1315                                   &adapter->crit_section);
1316                         /* Don't reschedule the watchdog, since we've restarted
1317                          * the init task. When init_task contacts the PF and
1318                          * gets everything set up again, it'll restart the
1319                          * watchdog for us. Down, boy. Sit. Stay. Woof.
1320                          */
1321                         return;
1322                 }
1323                 adapter->aq_pending = 0;
1324                 adapter->aq_required = 0;
1325                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1326                 goto watchdog_done;
1327         }
1328
1329         if ((adapter->state < __I40EVF_DOWN) ||
1330             (adapter->flags & I40EVF_FLAG_RESET_PENDING))
1331                 goto watchdog_done;
1332
1333         /* check for reset */
1334         if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) &&
1335             (rd32(hw, I40E_VFGEN_RSTAT) & 0x3) != I40E_VFR_VFACTIVE) {
1336                 adapter->state = __I40EVF_RESETTING;
1337                 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1338                 dev_err(&adapter->pdev->dev, "Hardware reset detected.\n");
1339                 dev_info(&adapter->pdev->dev, "Scheduling reset task\n");
1340                 schedule_work(&adapter->reset_task);
1341                 adapter->aq_pending = 0;
1342                 adapter->aq_required = 0;
1343                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1344                 goto watchdog_done;
1345         }
1346
1347         /* Process admin queue tasks. After init, everything gets done
1348          * here so we don't race on the admin queue.
1349          */
1350         if (adapter->aq_pending)
1351                 goto watchdog_done;
1352
1353         if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
1354                 i40evf_map_queues(adapter);
1355                 goto watchdog_done;
1356         }
1357
1358         if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
1359                 i40evf_add_ether_addrs(adapter);
1360                 goto watchdog_done;
1361         }
1362
1363         if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
1364                 i40evf_add_vlans(adapter);
1365                 goto watchdog_done;
1366         }
1367
1368         if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
1369                 i40evf_del_ether_addrs(adapter);
1370                 goto watchdog_done;
1371         }
1372
1373         if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
1374                 i40evf_del_vlans(adapter);
1375                 goto watchdog_done;
1376         }
1377
1378         if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
1379                 i40evf_disable_queues(adapter);
1380                 goto watchdog_done;
1381         }
1382
1383         if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
1384                 i40evf_configure_queues(adapter);
1385                 goto watchdog_done;
1386         }
1387
1388         if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
1389                 i40evf_enable_queues(adapter);
1390                 goto watchdog_done;
1391         }
1392
1393         if (adapter->state == __I40EVF_RUNNING)
1394                 i40evf_request_stats(adapter);
1395
1396         i40evf_irq_enable(adapter, true);
1397         i40evf_fire_sw_int(adapter, 0xFF);
1398
1399 watchdog_done:
1400         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1401 restart_watchdog:
1402         if (adapter->aq_required)
1403                 mod_timer(&adapter->watchdog_timer,
1404                           jiffies + msecs_to_jiffies(20));
1405         else
1406                 mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
1407         schedule_work(&adapter->adminq_task);
1408 }
1409
1410 /**
1411  * i40evf_configure_rss - increment to next available tx queue
1412  * @adapter: board private structure
1413  * @j: queue counter
1414  *
1415  * Helper function for RSS programming to increment through available
1416  * queus. Returns the next queue value.
1417  **/
1418 static int next_queue(struct i40evf_adapter *adapter, int j)
1419 {
1420         j += 1;
1421
1422         return j >= adapter->vsi_res->num_queue_pairs ? 0 : j;
1423 }
1424
1425 /**
1426  * i40evf_configure_rss - Prepare for RSS if used
1427  * @adapter: board private structure
1428  **/
1429 static void i40evf_configure_rss(struct i40evf_adapter *adapter)
1430 {
1431         struct i40e_hw *hw = &adapter->hw;
1432         u32 lut = 0;
1433         int i, j;
1434         u64 hena;
1435
1436         /* Set of random keys generated using kernel random number generator */
1437         static const u32 seed[I40E_VFQF_HKEY_MAX_INDEX + 1] = {
1438                         0x794221b4, 0xbca0c5ab, 0x6cd5ebd9, 0x1ada6127,
1439                         0x983b3aa1, 0x1c4e71eb, 0x7f6328b2, 0xfcdc0da0,
1440                         0xc135cafa, 0x7a6f7e2d, 0xe7102d28, 0x163cd12e,
1441                         0x4954b126 };
1442
1443         /* Hash type is configured by the PF - we just supply the key */
1444
1445         /* Fill out hash function seed */
1446         for (i = 0; i <= I40E_VFQF_HKEY_MAX_INDEX; i++)
1447                 wr32(hw, I40E_VFQF_HKEY(i), seed[i]);
1448
1449         /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
1450         hena = I40E_DEFAULT_RSS_HENA;
1451         wr32(hw, I40E_VFQF_HENA(0), (u32)hena);
1452         wr32(hw, I40E_VFQF_HENA(1), (u32)(hena >> 32));
1453
1454         /* Populate the LUT with max no. of queues in round robin fashion */
1455         j = adapter->vsi_res->num_queue_pairs;
1456         for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++) {
1457                 j = next_queue(adapter, j);
1458                 lut = j;
1459                 j = next_queue(adapter, j);
1460                 lut |= j << 8;
1461                 j = next_queue(adapter, j);
1462                 lut |= j << 16;
1463                 j = next_queue(adapter, j);
1464                 lut |= j << 24;
1465                 wr32(hw, I40E_VFQF_HLUT(i), lut);
1466         }
1467         i40e_flush(hw);
1468 }
1469
1470 #define I40EVF_RESET_WAIT_MS 100
1471 #define I40EVF_RESET_WAIT_COUNT 200
1472 /**
1473  * i40evf_reset_task - Call-back task to handle hardware reset
1474  * @work: pointer to work_struct
1475  *
1476  * During reset we need to shut down and reinitialize the admin queue
1477  * before we can use it to communicate with the PF again. We also clear
1478  * and reinit the rings because that context is lost as well.
1479  **/
1480 static void i40evf_reset_task(struct work_struct *work)
1481 {
1482         struct i40evf_adapter *adapter = container_of(work,
1483                                                       struct i40evf_adapter,
1484                                                       reset_task);
1485         struct i40e_hw *hw = &adapter->hw;
1486         int i = 0, err;
1487         uint32_t rstat_val;
1488
1489         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1490                                 &adapter->crit_section))
1491                 udelay(500);
1492
1493         if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) {
1494                 dev_info(&adapter->pdev->dev, "Requesting reset from PF\n");
1495                 i40evf_request_reset(adapter);
1496         }
1497
1498         /* poll until we see the reset actually happen */
1499         for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1500                 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1501                             I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1502                 if (rstat_val != I40E_VFR_VFACTIVE) {
1503                         dev_info(&adapter->pdev->dev, "Reset now occurring\n");
1504                         break;
1505                 } else {
1506                         msleep(I40EVF_RESET_WAIT_MS);
1507                 }
1508         }
1509         if (i == I40EVF_RESET_WAIT_COUNT) {
1510                 dev_err(&adapter->pdev->dev, "Reset was not detected\n");
1511                 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1512                 goto continue_reset; /* act like the reset happened */
1513         }
1514
1515         /* wait until the reset is complete and the PF is responding to us */
1516         for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1517                 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1518                             I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1519                 if (rstat_val == I40E_VFR_VFACTIVE) {
1520                         dev_info(&adapter->pdev->dev, "Reset is complete. Reinitializing.\n");
1521                         break;
1522                 } else {
1523                         msleep(I40EVF_RESET_WAIT_MS);
1524                 }
1525         }
1526         if (i == I40EVF_RESET_WAIT_COUNT) {
1527                 /* reset never finished */
1528                 dev_err(&adapter->pdev->dev, "Reset never finished (%x). PF driver is dead, and so am I.\n",
1529                         rstat_val);
1530                 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
1531
1532                 if (netif_running(adapter->netdev)) {
1533                         set_bit(__I40E_DOWN, &adapter->vsi.state);
1534                         i40evf_down(adapter);
1535                         i40evf_free_traffic_irqs(adapter);
1536                         i40evf_free_all_tx_resources(adapter);
1537                         i40evf_free_all_rx_resources(adapter);
1538                 }
1539                 i40evf_free_misc_irq(adapter);
1540                 i40evf_reset_interrupt_capability(adapter);
1541                 i40evf_free_queues(adapter);
1542                 kfree(adapter->vf_res);
1543                 i40evf_shutdown_adminq(hw);
1544                 adapter->netdev->flags &= ~IFF_UP;
1545                 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1546                 return; /* Do not attempt to reinit. It's dead, Jim. */
1547         }
1548
1549 continue_reset:
1550         adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1551
1552         i40evf_down(adapter);
1553         adapter->state = __I40EVF_RESETTING;
1554
1555         /* kill and reinit the admin queue */
1556         if (i40evf_shutdown_adminq(hw))
1557                 dev_warn(&adapter->pdev->dev,
1558                         "%s: Failed to destroy the Admin Queue resources\n",
1559                         __func__);
1560         err = i40evf_init_adminq(hw);
1561         if (err)
1562                 dev_info(&adapter->pdev->dev, "%s: init_adminq failed: %d\n",
1563                         __func__, err);
1564
1565         adapter->aq_pending = 0;
1566         adapter->aq_required = 0;
1567         i40evf_map_queues(adapter);
1568         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1569
1570         mod_timer(&adapter->watchdog_timer, jiffies + 2);
1571
1572         if (netif_running(adapter->netdev)) {
1573                 /* allocate transmit descriptors */
1574                 err = i40evf_setup_all_tx_resources(adapter);
1575                 if (err)
1576                         goto reset_err;
1577
1578                 /* allocate receive descriptors */
1579                 err = i40evf_setup_all_rx_resources(adapter);
1580                 if (err)
1581                         goto reset_err;
1582
1583                 i40evf_configure(adapter);
1584
1585                 err = i40evf_up_complete(adapter);
1586                 if (err)
1587                         goto reset_err;
1588
1589                 i40evf_irq_enable(adapter, true);
1590         }
1591         return;
1592 reset_err:
1593         dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit.\n");
1594         i40evf_close(adapter->netdev);
1595 }
1596
1597 /**
1598  * i40evf_adminq_task - worker thread to clean the admin queue
1599  * @work: pointer to work_struct containing our data
1600  **/
1601 static void i40evf_adminq_task(struct work_struct *work)
1602 {
1603         struct i40evf_adapter *adapter =
1604                 container_of(work, struct i40evf_adapter, adminq_task);
1605         struct i40e_hw *hw = &adapter->hw;
1606         struct i40e_arq_event_info event;
1607         struct i40e_virtchnl_msg *v_msg;
1608         i40e_status ret;
1609         u16 pending;
1610
1611         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
1612                 return;
1613
1614         event.msg_size = I40EVF_MAX_AQ_BUF_SIZE;
1615         event.msg_buf = kzalloc(event.msg_size, GFP_KERNEL);
1616         if (!event.msg_buf) {
1617                 dev_info(&adapter->pdev->dev, "%s: no memory for ARQ clean\n",
1618                                  __func__);
1619                 return;
1620         }
1621         v_msg = (struct i40e_virtchnl_msg *)&event.desc;
1622         do {
1623                 ret = i40evf_clean_arq_element(hw, &event, &pending);
1624                 if (ret)
1625                         break; /* No event to process or error cleaning ARQ */
1626
1627                 i40evf_virtchnl_completion(adapter, v_msg->v_opcode,
1628                                            v_msg->v_retval, event.msg_buf,
1629                                            event.msg_size);
1630                 if (pending != 0) {
1631                         dev_info(&adapter->pdev->dev,
1632                                  "%s: ARQ: Pending events %d\n",
1633                                  __func__, pending);
1634                         memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
1635                 }
1636         } while (pending);
1637
1638         /* re-enable Admin queue interrupt cause */
1639         i40evf_misc_irq_enable(adapter);
1640
1641         kfree(event.msg_buf);
1642 }
1643
1644 /**
1645  * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
1646  * @adapter: board private structure
1647  *
1648  * Free all transmit software resources
1649  **/
1650 static void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
1651 {
1652         int i;
1653
1654         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
1655                 if (adapter->tx_rings[i]->desc)
1656                         i40evf_free_tx_resources(adapter->tx_rings[i]);
1657
1658 }
1659
1660 /**
1661  * i40evf_setup_all_tx_resources - allocate all queues Tx resources
1662  * @adapter: board private structure
1663  *
1664  * If this function returns with an error, then it's possible one or
1665  * more of the rings is populated (while the rest are not).  It is the
1666  * callers duty to clean those orphaned rings.
1667  *
1668  * Return 0 on success, negative on failure
1669  **/
1670 static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter)
1671 {
1672         int i, err = 0;
1673
1674         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1675                 err = i40evf_setup_tx_descriptors(adapter->tx_rings[i]);
1676                 if (!err)
1677                         continue;
1678                 dev_err(&adapter->pdev->dev,
1679                         "%s: Allocation for Tx Queue %u failed\n",
1680                         __func__, i);
1681                 break;
1682         }
1683
1684         return err;
1685 }
1686
1687 /**
1688  * i40evf_setup_all_rx_resources - allocate all queues Rx resources
1689  * @adapter: board private structure
1690  *
1691  * If this function returns with an error, then it's possible one or
1692  * more of the rings is populated (while the rest are not).  It is the
1693  * callers duty to clean those orphaned rings.
1694  *
1695  * Return 0 on success, negative on failure
1696  **/
1697 static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter)
1698 {
1699         int i, err = 0;
1700
1701         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1702                 err = i40evf_setup_rx_descriptors(adapter->rx_rings[i]);
1703                 if (!err)
1704                         continue;
1705                 dev_err(&adapter->pdev->dev,
1706                         "%s: Allocation for Rx Queue %u failed\n",
1707                         __func__, i);
1708                 break;
1709         }
1710         return err;
1711 }
1712
1713 /**
1714  * i40evf_free_all_rx_resources - Free Rx Resources for All Queues
1715  * @adapter: board private structure
1716  *
1717  * Free all receive software resources
1718  **/
1719 static void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
1720 {
1721         int i;
1722
1723         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
1724                 if (adapter->rx_rings[i]->desc)
1725                         i40evf_free_rx_resources(adapter->rx_rings[i]);
1726 }
1727
1728 /**
1729  * i40evf_open - Called when a network interface is made active
1730  * @netdev: network interface device structure
1731  *
1732  * Returns 0 on success, negative value on failure
1733  *
1734  * The open entry point is called when a network interface is made
1735  * active by the system (IFF_UP).  At this point all resources needed
1736  * for transmit and receive operations are allocated, the interrupt
1737  * handler is registered with the OS, the watchdog timer is started,
1738  * and the stack is notified that the interface is ready.
1739  **/
1740 static int i40evf_open(struct net_device *netdev)
1741 {
1742         struct i40evf_adapter *adapter = netdev_priv(netdev);
1743         int err;
1744
1745         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1746                 dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
1747                 return -EIO;
1748         }
1749         if (adapter->state != __I40EVF_DOWN)
1750                 return -EBUSY;
1751
1752         /* allocate transmit descriptors */
1753         err = i40evf_setup_all_tx_resources(adapter);
1754         if (err)
1755                 goto err_setup_tx;
1756
1757         /* allocate receive descriptors */
1758         err = i40evf_setup_all_rx_resources(adapter);
1759         if (err)
1760                 goto err_setup_rx;
1761
1762         /* clear any pending interrupts, may auto mask */
1763         err = i40evf_request_traffic_irqs(adapter, netdev->name);
1764         if (err)
1765                 goto err_req_irq;
1766
1767         i40evf_configure(adapter);
1768
1769         err = i40evf_up_complete(adapter);
1770         if (err)
1771                 goto err_req_irq;
1772
1773         i40evf_irq_enable(adapter, true);
1774
1775         return 0;
1776
1777 err_req_irq:
1778         i40evf_down(adapter);
1779         i40evf_free_traffic_irqs(adapter);
1780 err_setup_rx:
1781         i40evf_free_all_rx_resources(adapter);
1782 err_setup_tx:
1783         i40evf_free_all_tx_resources(adapter);
1784
1785         return err;
1786 }
1787
1788 /**
1789  * i40evf_close - Disables a network interface
1790  * @netdev: network interface device structure
1791  *
1792  * Returns 0, this is not allowed to fail
1793  *
1794  * The close entry point is called when an interface is de-activated
1795  * by the OS.  The hardware is still under the drivers control, but
1796  * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
1797  * are freed, along with all transmit and receive resources.
1798  **/
1799 static int i40evf_close(struct net_device *netdev)
1800 {
1801         struct i40evf_adapter *adapter = netdev_priv(netdev);
1802
1803         if (adapter->state <= __I40EVF_DOWN)
1804                 return 0;
1805
1806         /* signal that we are down to the interrupt handler */
1807         adapter->state = __I40EVF_DOWN;
1808
1809         set_bit(__I40E_DOWN, &adapter->vsi.state);
1810
1811         i40evf_down(adapter);
1812         i40evf_free_traffic_irqs(adapter);
1813
1814         i40evf_free_all_tx_resources(adapter);
1815         i40evf_free_all_rx_resources(adapter);
1816
1817         return 0;
1818 }
1819
1820 /**
1821  * i40evf_get_stats - Get System Network Statistics
1822  * @netdev: network interface device structure
1823  *
1824  * Returns the address of the device statistics structure.
1825  * The statistics are actually updated from the timer callback.
1826  **/
1827 static struct net_device_stats *i40evf_get_stats(struct net_device *netdev)
1828 {
1829         struct i40evf_adapter *adapter = netdev_priv(netdev);
1830
1831         /* only return the current stats */
1832         return &adapter->net_stats;
1833 }
1834
1835 /**
1836  * i40evf_reinit_locked - Software reinit
1837  * @adapter: board private structure
1838  *
1839  * Reinititalizes the ring structures in response to a software configuration
1840  * change. Roughly the same as close followed by open, but skips releasing
1841  * and reallocating the interrupts.
1842  **/
1843 void i40evf_reinit_locked(struct i40evf_adapter *adapter)
1844 {
1845         struct net_device *netdev = adapter->netdev;
1846         int err;
1847
1848         WARN_ON(in_interrupt());
1849
1850         adapter->state = __I40EVF_RESETTING;
1851
1852         i40evf_down(adapter);
1853
1854         /* allocate transmit descriptors */
1855         err = i40evf_setup_all_tx_resources(adapter);
1856         if (err)
1857                 goto err_reinit;
1858
1859         /* allocate receive descriptors */
1860         err = i40evf_setup_all_rx_resources(adapter);
1861         if (err)
1862                 goto err_reinit;
1863
1864         i40evf_configure(adapter);
1865
1866         err = i40evf_up_complete(adapter);
1867         if (err)
1868                 goto err_reinit;
1869
1870         i40evf_irq_enable(adapter, true);
1871         return;
1872
1873 err_reinit:
1874         dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit.\n");
1875         i40evf_close(netdev);
1876 }
1877
1878 /**
1879  * i40evf_change_mtu - Change the Maximum Transfer Unit
1880  * @netdev: network interface device structure
1881  * @new_mtu: new value for maximum frame size
1882  *
1883  * Returns 0 on success, negative on failure
1884  **/
1885 static int i40evf_change_mtu(struct net_device *netdev, int new_mtu)
1886 {
1887         struct i40evf_adapter *adapter = netdev_priv(netdev);
1888         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
1889
1890         if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
1891                 return -EINVAL;
1892
1893         /* must set new MTU before calling down or up */
1894         netdev->mtu = new_mtu;
1895         i40evf_reinit_locked(adapter);
1896         return 0;
1897 }
1898
1899 static const struct net_device_ops i40evf_netdev_ops = {
1900         .ndo_open               = i40evf_open,
1901         .ndo_stop               = i40evf_close,
1902         .ndo_start_xmit         = i40evf_xmit_frame,
1903         .ndo_get_stats          = i40evf_get_stats,
1904         .ndo_set_rx_mode        = i40evf_set_rx_mode,
1905         .ndo_validate_addr      = eth_validate_addr,
1906         .ndo_set_mac_address    = i40evf_set_mac,
1907         .ndo_change_mtu         = i40evf_change_mtu,
1908         .ndo_tx_timeout         = i40evf_tx_timeout,
1909         .ndo_vlan_rx_add_vid    = i40evf_vlan_rx_add_vid,
1910         .ndo_vlan_rx_kill_vid   = i40evf_vlan_rx_kill_vid,
1911 };
1912
1913 /**
1914  * i40evf_check_reset_complete - check that VF reset is complete
1915  * @hw: pointer to hw struct
1916  *
1917  * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
1918  **/
1919 static int i40evf_check_reset_complete(struct i40e_hw *hw)
1920 {
1921         u32 rstat;
1922         int i;
1923
1924         for (i = 0; i < 100; i++) {
1925                 rstat = rd32(hw, I40E_VFGEN_RSTAT);
1926                 if (rstat == I40E_VFR_VFACTIVE)
1927                         return 0;
1928                 udelay(10);
1929         }
1930         return -EBUSY;
1931 }
1932
1933 /**
1934  * i40evf_init_task - worker thread to perform delayed initialization
1935  * @work: pointer to work_struct containing our data
1936  *
1937  * This task completes the work that was begun in probe. Due to the nature
1938  * of VF-PF communications, we may need to wait tens of milliseconds to get
1939  * reponses back from the PF. Rather than busy-wait in probe and bog down the
1940  * whole system, we'll do it in a task so we can sleep.
1941  * This task only runs during driver init. Once we've established
1942  * communications with the PF driver and set up our netdev, the watchdog
1943  * takes over.
1944  **/
1945 static void i40evf_init_task(struct work_struct *work)
1946 {
1947         struct i40evf_adapter *adapter = container_of(work,
1948                                                       struct i40evf_adapter,
1949                                                       init_task.work);
1950         struct net_device *netdev = adapter->netdev;
1951         struct i40evf_mac_filter *f;
1952         struct i40e_hw *hw = &adapter->hw;
1953         struct pci_dev *pdev = adapter->pdev;
1954         int i, err, bufsz;
1955
1956         switch (adapter->state) {
1957         case __I40EVF_STARTUP:
1958                 /* driver loaded, probe complete */
1959                 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1960                 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1961                 err = i40e_set_mac_type(hw);
1962                 if (err) {
1963                         dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
1964                                 err);
1965                 goto err;
1966                 }
1967                 err = i40evf_check_reset_complete(hw);
1968                 if (err) {
1969                         dev_err(&pdev->dev, "Device is still in reset (%d)\n",
1970                                 err);
1971                         goto err;
1972                 }
1973                 hw->aq.num_arq_entries = I40EVF_AQ_LEN;
1974                 hw->aq.num_asq_entries = I40EVF_AQ_LEN;
1975                 hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
1976                 hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
1977
1978                 err = i40evf_init_adminq(hw);
1979                 if (err) {
1980                         dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
1981                                 err);
1982                         goto err;
1983                 }
1984                 err = i40evf_send_api_ver(adapter);
1985                 if (err) {
1986                         dev_err(&pdev->dev, "Unable to send to PF (%d)\n", err);
1987                         i40evf_shutdown_adminq(hw);
1988                         goto err;
1989                 }
1990                 adapter->state = __I40EVF_INIT_VERSION_CHECK;
1991                 goto restart;
1992                 break;
1993         case __I40EVF_INIT_VERSION_CHECK:
1994                 if (!i40evf_asq_done(hw)) {
1995                         dev_err(&pdev->dev, "Admin queue command never completed.\n");
1996                         goto err;
1997                 }
1998
1999                 /* aq msg sent, awaiting reply */
2000                 err = i40evf_verify_api_ver(adapter);
2001                 if (err) {
2002                         dev_err(&pdev->dev, "Unable to verify API version (%d)\n",
2003                                 err);
2004                         goto err;
2005                 }
2006                 err = i40evf_send_vf_config_msg(adapter);
2007                 if (err) {
2008                         dev_err(&pdev->dev, "Unable send config request (%d)\n",
2009                                 err);
2010                         goto err;
2011                 }
2012                 adapter->state = __I40EVF_INIT_GET_RESOURCES;
2013                 goto restart;
2014                 break;
2015         case __I40EVF_INIT_GET_RESOURCES:
2016                 /* aq msg sent, awaiting reply */
2017                 if (!adapter->vf_res) {
2018                         bufsz = sizeof(struct i40e_virtchnl_vf_resource) +
2019                                 (I40E_MAX_VF_VSI *
2020                                  sizeof(struct i40e_virtchnl_vsi_resource));
2021                         adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
2022                         if (!adapter->vf_res)
2023                                 goto err;
2024                 }
2025                 err = i40evf_get_vf_config(adapter);
2026                 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
2027                         goto restart;
2028                 if (err) {
2029                         dev_err(&pdev->dev, "Unable to get VF config (%d)\n",
2030                                 err);
2031                         goto err_alloc;
2032                 }
2033                 adapter->state = __I40EVF_INIT_SW;
2034                 break;
2035         default:
2036                 goto err_alloc;
2037         }
2038         /* got VF config message back from PF, now we can parse it */
2039         for (i = 0; i < adapter->vf_res->num_vsis; i++) {
2040                 if (adapter->vf_res->vsi_res[i].vsi_type == I40E_VSI_SRIOV)
2041                         adapter->vsi_res = &adapter->vf_res->vsi_res[i];
2042         }
2043         if (!adapter->vsi_res) {
2044                 dev_err(&pdev->dev, "No LAN VSI found\n");
2045                 goto err_alloc;
2046         }
2047
2048         adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
2049
2050         netdev->netdev_ops = &i40evf_netdev_ops;
2051         i40evf_set_ethtool_ops(netdev);
2052         netdev->watchdog_timeo = 5 * HZ;
2053         netdev->features |= NETIF_F_HIGHDMA |
2054                             NETIF_F_SG |
2055                             NETIF_F_IP_CSUM |
2056                             NETIF_F_SCTP_CSUM |
2057                             NETIF_F_IPV6_CSUM |
2058                             NETIF_F_TSO |
2059                             NETIF_F_TSO6 |
2060                             NETIF_F_RXCSUM |
2061                             NETIF_F_GRO;
2062
2063         if (adapter->vf_res->vf_offload_flags
2064             & I40E_VIRTCHNL_VF_OFFLOAD_VLAN) {
2065                 netdev->vlan_features = netdev->features;
2066                 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX |
2067                                     NETIF_F_HW_VLAN_CTAG_RX |
2068                                     NETIF_F_HW_VLAN_CTAG_FILTER;
2069         }
2070
2071         /* copy netdev features into list of user selectable features */
2072         netdev->hw_features |= netdev->features;
2073         netdev->hw_features &= ~NETIF_F_RXCSUM;
2074
2075         if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
2076                 dev_info(&pdev->dev, "Invalid MAC address %pMAC, using random\n",
2077                          adapter->hw.mac.addr);
2078                 random_ether_addr(adapter->hw.mac.addr);
2079         }
2080         memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len);
2081         memcpy(netdev->perm_addr, adapter->hw.mac.addr, netdev->addr_len);
2082
2083         INIT_LIST_HEAD(&adapter->mac_filter_list);
2084         INIT_LIST_HEAD(&adapter->vlan_filter_list);
2085         f = kzalloc(sizeof(*f), GFP_ATOMIC);
2086         if (NULL == f)
2087                 goto err_sw_init;
2088
2089         memcpy(f->macaddr, adapter->hw.mac.addr, ETH_ALEN);
2090         f->add = true;
2091         adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
2092
2093         list_add(&f->list, &adapter->mac_filter_list);
2094
2095         init_timer(&adapter->watchdog_timer);
2096         adapter->watchdog_timer.function = &i40evf_watchdog_timer;
2097         adapter->watchdog_timer.data = (unsigned long)adapter;
2098         mod_timer(&adapter->watchdog_timer, jiffies + 1);
2099
2100         err = i40evf_init_interrupt_scheme(adapter);
2101         if (err)
2102                 goto err_sw_init;
2103         i40evf_map_rings_to_vectors(adapter);
2104         i40evf_configure_rss(adapter);
2105         err = i40evf_request_misc_irq(adapter);
2106         if (err)
2107                 goto err_sw_init;
2108
2109         netif_carrier_off(netdev);
2110
2111         adapter->vsi.id = adapter->vsi_res->vsi_id;
2112         adapter->vsi.seid = adapter->vsi_res->vsi_id; /* dummy */
2113         adapter->vsi.back = adapter;
2114         adapter->vsi.base_vector = 1;
2115         adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
2116         adapter->vsi.rx_itr_setting = (I40E_ITR_DYNAMIC |
2117                                        ITR_REG_TO_USEC(I40E_ITR_RX_DEF));
2118         adapter->vsi.tx_itr_setting = (I40E_ITR_DYNAMIC |
2119                                        ITR_REG_TO_USEC(I40E_ITR_TX_DEF));
2120         adapter->vsi.netdev = adapter->netdev;
2121
2122         if (!adapter->netdev_registered) {
2123                 err = register_netdev(netdev);
2124                 if (err)
2125                         goto err_register;
2126         }
2127
2128         adapter->netdev_registered = true;
2129
2130         netif_tx_stop_all_queues(netdev);
2131
2132         dev_info(&pdev->dev, "MAC address: %pMAC\n", adapter->hw.mac.addr);
2133         if (netdev->features & NETIF_F_GRO)
2134                 dev_info(&pdev->dev, "GRO is enabled\n");
2135
2136         dev_info(&pdev->dev, "%s\n", i40evf_driver_string);
2137         adapter->state = __I40EVF_DOWN;
2138         set_bit(__I40E_DOWN, &adapter->vsi.state);
2139         i40evf_misc_irq_enable(adapter);
2140         return;
2141 restart:
2142         schedule_delayed_work(&adapter->init_task,
2143                               msecs_to_jiffies(50));
2144         return;
2145
2146 err_register:
2147         i40evf_free_misc_irq(adapter);
2148 err_sw_init:
2149         i40evf_reset_interrupt_capability(adapter);
2150 err_alloc:
2151         kfree(adapter->vf_res);
2152         adapter->vf_res = NULL;
2153 err:
2154         /* Things went into the weeds, so try again later */
2155         if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
2156                 dev_err(&pdev->dev, "Failed to communicate with PF; giving up.\n");
2157                 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
2158                 return; /* do not reschedule */
2159         }
2160         schedule_delayed_work(&adapter->init_task, HZ * 3);
2161         return;
2162 }
2163
2164 /**
2165  * i40evf_shutdown - Shutdown the device in preparation for a reboot
2166  * @pdev: pci device structure
2167  **/
2168 static void i40evf_shutdown(struct pci_dev *pdev)
2169 {
2170         struct net_device *netdev = pci_get_drvdata(pdev);
2171
2172         netif_device_detach(netdev);
2173
2174         if (netif_running(netdev))
2175                 i40evf_close(netdev);
2176
2177 #ifdef CONFIG_PM
2178         pci_save_state(pdev);
2179
2180 #endif
2181         pci_disable_device(pdev);
2182 }
2183
2184 /**
2185  * i40evf_probe - Device Initialization Routine
2186  * @pdev: PCI device information struct
2187  * @ent: entry in i40evf_pci_tbl
2188  *
2189  * Returns 0 on success, negative on failure
2190  *
2191  * i40evf_probe initializes an adapter identified by a pci_dev structure.
2192  * The OS initialization, configuring of the adapter private structure,
2193  * and a hardware reset occur.
2194  **/
2195 static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2196 {
2197         struct net_device *netdev;
2198         struct i40evf_adapter *adapter = NULL;
2199         struct i40e_hw *hw = NULL;
2200         int err;
2201
2202         err = pci_enable_device(pdev);
2203         if (err)
2204                 return err;
2205
2206         err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
2207         if (err) {
2208                 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2209                 if (err) {
2210                         dev_err(&pdev->dev,
2211                                 "DMA configuration failed: 0x%x\n", err);
2212                         goto err_dma;
2213                 }
2214         }
2215
2216         err = pci_request_regions(pdev, i40evf_driver_name);
2217         if (err) {
2218                 dev_err(&pdev->dev,
2219                         "pci_request_regions failed 0x%x\n", err);
2220                 goto err_pci_reg;
2221         }
2222
2223         pci_enable_pcie_error_reporting(pdev);
2224
2225         pci_set_master(pdev);
2226
2227         netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter),
2228                                    MAX_TX_QUEUES);
2229         if (!netdev) {
2230                 err = -ENOMEM;
2231                 goto err_alloc_etherdev;
2232         }
2233
2234         SET_NETDEV_DEV(netdev, &pdev->dev);
2235
2236         pci_set_drvdata(pdev, netdev);
2237         adapter = netdev_priv(netdev);
2238
2239         adapter->netdev = netdev;
2240         adapter->pdev = pdev;
2241
2242         hw = &adapter->hw;
2243         hw->back = adapter;
2244
2245         adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
2246         adapter->state = __I40EVF_STARTUP;
2247
2248         /* Call save state here because it relies on the adapter struct. */
2249         pci_save_state(pdev);
2250
2251         hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
2252                               pci_resource_len(pdev, 0));
2253         if (!hw->hw_addr) {
2254                 err = -EIO;
2255                 goto err_ioremap;
2256         }
2257         hw->vendor_id = pdev->vendor;
2258         hw->device_id = pdev->device;
2259         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2260         hw->subsystem_vendor_id = pdev->subsystem_vendor;
2261         hw->subsystem_device_id = pdev->subsystem_device;
2262         hw->bus.device = PCI_SLOT(pdev->devfn);
2263         hw->bus.func = PCI_FUNC(pdev->devfn);
2264
2265         INIT_WORK(&adapter->reset_task, i40evf_reset_task);
2266         INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
2267         INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
2268         INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
2269         schedule_delayed_work(&adapter->init_task, 10);
2270
2271         return 0;
2272
2273 err_ioremap:
2274         free_netdev(netdev);
2275 err_alloc_etherdev:
2276         pci_release_regions(pdev);
2277 err_pci_reg:
2278 err_dma:
2279         pci_disable_device(pdev);
2280         return err;
2281 }
2282
2283 #ifdef CONFIG_PM
2284 /**
2285  * i40evf_suspend - Power management suspend routine
2286  * @pdev: PCI device information struct
2287  * @state: unused
2288  *
2289  * Called when the system (VM) is entering sleep/suspend.
2290  **/
2291 static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
2292 {
2293         struct net_device *netdev = pci_get_drvdata(pdev);
2294         struct i40evf_adapter *adapter = netdev_priv(netdev);
2295         int retval = 0;
2296
2297         netif_device_detach(netdev);
2298
2299         if (netif_running(netdev)) {
2300                 rtnl_lock();
2301                 i40evf_down(adapter);
2302                 rtnl_unlock();
2303         }
2304         i40evf_free_misc_irq(adapter);
2305         i40evf_reset_interrupt_capability(adapter);
2306
2307         retval = pci_save_state(pdev);
2308         if (retval)
2309                 return retval;
2310
2311         pci_disable_device(pdev);
2312
2313         return 0;
2314 }
2315
2316 /**
2317  * i40evf_resume - Power managment resume routine
2318  * @pdev: PCI device information struct
2319  *
2320  * Called when the system (VM) is resumed from sleep/suspend.
2321  **/
2322 static int i40evf_resume(struct pci_dev *pdev)
2323 {
2324         struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
2325         struct net_device *netdev = adapter->netdev;
2326         u32 err;
2327
2328         pci_set_power_state(pdev, PCI_D0);
2329         pci_restore_state(pdev);
2330         /* pci_restore_state clears dev->state_saved so call
2331          * pci_save_state to restore it.
2332          */
2333         pci_save_state(pdev);
2334
2335         err = pci_enable_device_mem(pdev);
2336         if (err) {
2337                 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
2338                 return err;
2339         }
2340         pci_set_master(pdev);
2341
2342         rtnl_lock();
2343         err = i40evf_set_interrupt_capability(adapter);
2344         if (err) {
2345                 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
2346                 return err;
2347         }
2348         err = i40evf_request_misc_irq(adapter);
2349         rtnl_unlock();
2350         if (err) {
2351                 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
2352                 return err;
2353         }
2354
2355         schedule_work(&adapter->reset_task);
2356
2357         netif_device_attach(netdev);
2358
2359         return err;
2360 }
2361
2362 #endif /* CONFIG_PM */
2363 /**
2364  * i40evf_remove - Device Removal Routine
2365  * @pdev: PCI device information struct
2366  *
2367  * i40evf_remove is called by the PCI subsystem to alert the driver
2368  * that it should release a PCI device.  The could be caused by a
2369  * Hot-Plug event, or because the driver is going to be removed from
2370  * memory.
2371  **/
2372 static void i40evf_remove(struct pci_dev *pdev)
2373 {
2374         struct net_device *netdev = pci_get_drvdata(pdev);
2375         struct i40evf_adapter *adapter = netdev_priv(netdev);
2376         struct i40e_hw *hw = &adapter->hw;
2377
2378         cancel_delayed_work_sync(&adapter->init_task);
2379         cancel_work_sync(&adapter->reset_task);
2380
2381         if (adapter->netdev_registered) {
2382                 unregister_netdev(netdev);
2383                 adapter->netdev_registered = false;
2384         }
2385         adapter->state = __I40EVF_REMOVE;
2386
2387         if (adapter->msix_entries) {
2388                 i40evf_misc_irq_disable(adapter);
2389                 i40evf_free_misc_irq(adapter);
2390                 i40evf_reset_interrupt_capability(adapter);
2391         }
2392
2393         del_timer_sync(&adapter->watchdog_timer);
2394         flush_scheduled_work();
2395
2396         if (hw->aq.asq.count)
2397                 i40evf_shutdown_adminq(hw);
2398
2399         iounmap(hw->hw_addr);
2400         pci_release_regions(pdev);
2401
2402         i40evf_free_queues(adapter);
2403         kfree(adapter->vf_res);
2404
2405         free_netdev(netdev);
2406
2407         pci_disable_pcie_error_reporting(pdev);
2408
2409         pci_disable_device(pdev);
2410 }
2411
2412 static struct pci_driver i40evf_driver = {
2413         .name     = i40evf_driver_name,
2414         .id_table = i40evf_pci_tbl,
2415         .probe    = i40evf_probe,
2416         .remove   = i40evf_remove,
2417 #ifdef CONFIG_PM
2418         .suspend  = i40evf_suspend,
2419         .resume   = i40evf_resume,
2420 #endif
2421         .shutdown = i40evf_shutdown,
2422 };
2423
2424 /**
2425  * i40e_init_module - Driver Registration Routine
2426  *
2427  * i40e_init_module is the first routine called when the driver is
2428  * loaded. All it does is register with the PCI subsystem.
2429  **/
2430 static int __init i40evf_init_module(void)
2431 {
2432         int ret;
2433         pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
2434                i40evf_driver_version);
2435
2436         pr_info("%s\n", i40evf_copyright);
2437
2438         ret = pci_register_driver(&i40evf_driver);
2439         return ret;
2440 }
2441
2442 module_init(i40evf_init_module);
2443
2444 /**
2445  * i40e_exit_module - Driver Exit Cleanup Routine
2446  *
2447  * i40e_exit_module is called just before the driver is removed
2448  * from memory.
2449  **/
2450 static void __exit i40evf_exit_module(void)
2451 {
2452         pci_unregister_driver(&i40evf_driver);
2453 }
2454
2455 module_exit(i40evf_exit_module);
2456
2457 /* i40evf_main.c */