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 "0.9.27"
  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         if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING)) {
 176                 adapter->flags |= I40EVF_FLAG_RESET_NEEDED;
 177                 schedule_work(&adapter->reset_task);
 178         }
 179 }
 180
 181 /**
 182  * i40evf_misc_irq_disable - Mask off interrupt generation on the NIC
 183  * @adapter: board private structure
 184  **/
 185 static void i40evf_misc_irq_disable(struct i40evf_adapter *adapter)
 186 {
 187         struct i40e_hw *hw = &adapter->hw;
 188         wr32(hw, I40E_VFINT_DYN_CTL01, 0);
 189
 190         /* read flush */
 191         rd32(hw, I40E_VFGEN_RSTAT);
 192
 193         synchronize_irq(adapter->msix_entries[0].vector);
 194 }
 195
 196 /**
 197  * i40evf_misc_irq_enable - Enable default interrupt generation settings
 198  * @adapter: board private structure
 199  **/
 200 static void i40evf_misc_irq_enable(struct i40evf_adapter *adapter)
 201 {
 202         struct i40e_hw *hw = &adapter->hw;
 203         wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK |
 204                                        I40E_VFINT_DYN_CTL01_ITR_INDX_MASK);
 205         wr32(hw, I40E_VFINT_ICR0_ENA1, I40E_VFINT_ICR0_ENA_ADMINQ_MASK);
 206
 207         /* read flush */
 208         rd32(hw, I40E_VFGEN_RSTAT);
 209 }
 210
 211 /**
 212  * i40evf_irq_disable - Mask off interrupt generation on the NIC
 213  * @adapter: board private structure
 214  **/
 215 static void i40evf_irq_disable(struct i40evf_adapter *adapter)
 216 {
 217         int i;
 218         struct i40e_hw *hw = &adapter->hw;
 219
 220         if (!adapter->msix_entries)
 221                 return;
 222
 223         for (i = 1; i < adapter->num_msix_vectors; i++) {
 224                 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), 0);
 225                 synchronize_irq(adapter->msix_entries[i].vector);
 226         }
 227         /* read flush */
 228         rd32(hw, I40E_VFGEN_RSTAT);
 229
 230 }
 231
 232 /**
 233  * i40evf_irq_enable_queues - Enable interrupt for specified queues
 234  * @adapter: board private structure
 235  * @mask: bitmap of queues to enable
 236  **/
 237 void i40evf_irq_enable_queues(struct i40evf_adapter *adapter, u32 mask)
 238 {
 239         struct i40e_hw *hw = &adapter->hw;
 240         int i;
 241
 242         for (i = 1; i < adapter->num_msix_vectors; i++) {
 243                 if (mask & (1 << (i - 1))) {
 244                         wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1),
 245                              I40E_VFINT_DYN_CTLN1_INTENA_MASK |
 246                              I40E_VFINT_DYN_CTLN_CLEARPBA_MASK);
 247                 }
 248         }
 249 }
 250
 251 /**
 252  * i40evf_fire_sw_int - Generate SW interrupt for specified vectors
 253  * @adapter: board private structure
 254  * @mask: bitmap of vectors to trigger
 255  **/
 256 static void i40evf_fire_sw_int(struct i40evf_adapter *adapter,
 257                                             u32 mask)
 258 {
 259         struct i40e_hw *hw = &adapter->hw;
 260         int i;
 261         uint32_t dyn_ctl;
 262
 263         for (i = 1; i < adapter->num_msix_vectors; i++) {
 264                 if (mask & (1 << i)) {
 265                         dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTLN1(i - 1));
 266                         dyn_ctl |= I40E_VFINT_DYN_CTLN_SWINT_TRIG_MASK |
 267                                    I40E_VFINT_DYN_CTLN_CLEARPBA_MASK;
 268                         wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), dyn_ctl);
 269                 }
 270         }
 271 }
 272
 273 /**
 274  * i40evf_irq_enable - Enable default interrupt generation settings
 275  * @adapter: board private structure
 276  **/
 277 void i40evf_irq_enable(struct i40evf_adapter *adapter, bool flush)
 278 {
 279         struct i40e_hw *hw = &adapter->hw;
 280
 281         i40evf_irq_enable_queues(adapter, ~0);
 282
 283         if (flush)
 284                 rd32(hw, I40E_VFGEN_RSTAT);
 285 }
 286
 287 /**
 288  * i40evf_msix_aq - Interrupt handler for vector 0
 289  * @irq: interrupt number
 290  * @data: pointer to netdev
 291  **/
 292 static irqreturn_t i40evf_msix_aq(int irq, void *data)
 293 {
 294         struct net_device *netdev = data;
 295         struct i40evf_adapter *adapter = netdev_priv(netdev);
 296         struct i40e_hw *hw = &adapter->hw;
 297         u32 val;
 298         u32 ena_mask;
 299
 300         /* handle non-queue interrupts */
 301         val = rd32(hw, I40E_VFINT_ICR01);
 302         ena_mask = rd32(hw, I40E_VFINT_ICR0_ENA1);
 303
 304
 305         val = rd32(hw, I40E_VFINT_DYN_CTL01);
 306         val = val | I40E_PFINT_DYN_CTL0_CLEARPBA_MASK;
 307         wr32(hw, I40E_VFINT_DYN_CTL01, val);
 308
 309         /* re-enable interrupt causes */
 310         wr32(hw, I40E_VFINT_ICR0_ENA1, ena_mask);
 311         wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK);
 312
 313         /* schedule work on the private workqueue */
 314         schedule_work(&adapter->adminq_task);
 315
 316         return IRQ_HANDLED;
 317 }
 318
 319 /**
 320  * i40evf_msix_clean_rings - MSIX mode Interrupt Handler
 321  * @irq: interrupt number
 322  * @data: pointer to a q_vector
 323  **/
 324 static irqreturn_t i40evf_msix_clean_rings(int irq, void *data)
 325 {
 326         struct i40e_q_vector *q_vector = data;
 327
 328         if (!q_vector->tx.ring && !q_vector->rx.ring)
 329                 return IRQ_HANDLED;
 330
 331         napi_schedule(&q_vector->napi);
 332
 333         return IRQ_HANDLED;
 334 }
 335
 336 /**
 337  * i40evf_map_vector_to_rxq - associate irqs with rx queues
 338  * @adapter: board private structure
 339  * @v_idx: interrupt number
 340  * @r_idx: queue number
 341  **/
 342 static void
 343 i40evf_map_vector_to_rxq(struct i40evf_adapter *adapter, int v_idx, int r_idx)
 344 {
 345         struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
 346         struct i40e_ring *rx_ring = adapter->rx_rings[r_idx];
 347
 348         rx_ring->q_vector = q_vector;
 349         rx_ring->next = q_vector->rx.ring;
 350         rx_ring->vsi = &adapter->vsi;
 351         q_vector->rx.ring = rx_ring;
 352         q_vector->rx.count++;
 353         q_vector->rx.latency_range = I40E_LOW_LATENCY;
 354 }
 355
 356 /**
 357  * i40evf_map_vector_to_txq - associate irqs with tx queues
 358  * @adapter: board private structure
 359  * @v_idx: interrupt number
 360  * @t_idx: queue number
 361  **/
 362 static void
 363 i40evf_map_vector_to_txq(struct i40evf_adapter *adapter, int v_idx, int t_idx)
 364 {
 365         struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
 366         struct i40e_ring *tx_ring = adapter->tx_rings[t_idx];
 367
 368         tx_ring->q_vector = q_vector;
 369         tx_ring->next = q_vector->tx.ring;
 370         tx_ring->vsi = &adapter->vsi;
 371         q_vector->tx.ring = tx_ring;
 372         q_vector->tx.count++;
 373         q_vector->tx.latency_range = I40E_LOW_LATENCY;
 374         q_vector->num_ringpairs++;
 375         q_vector->ring_mask |= (1 << t_idx);
 376 }
 377
 378 /**
 379  * i40evf_map_rings_to_vectors - Maps descriptor rings to vectors
 380  * @adapter: board private structure to initialize
 381  *
 382  * This function maps descriptor rings to the queue-specific vectors
 383  * we were allotted through the MSI-X enabling code.  Ideally, we'd have
 384  * one vector per ring/queue, but on a constrained vector budget, we
 385  * group the rings as "efficiently" as possible.  You would add new
 386  * mapping configurations in here.
 387  **/
 388 static int i40evf_map_rings_to_vectors(struct i40evf_adapter *adapter)
 389 {
 390         int q_vectors;
 391         int v_start = 0;
 392         int rxr_idx = 0, txr_idx = 0;
 393         int rxr_remaining = adapter->vsi_res->num_queue_pairs;
 394         int txr_remaining = adapter->vsi_res->num_queue_pairs;
 395         int i, j;
 396         int rqpv, tqpv;
 397         int err = 0;
 398
 399         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 400
 401         /* The ideal configuration...
 402          * We have enough vectors to map one per queue.
 403          */
 404         if (q_vectors == (rxr_remaining * 2)) {
 405                 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
 406                         i40evf_map_vector_to_rxq(adapter, v_start, rxr_idx);
 407
 408                 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
 409                         i40evf_map_vector_to_txq(adapter, v_start, txr_idx);
 410                 goto out;
 411         }
 412
 413         /* If we don't have enough vectors for a 1-to-1
 414          * mapping, we'll have to group them so there are
 415          * multiple queues per vector.
 416          * Re-adjusting *qpv takes care of the remainder.
 417          */
 418         for (i = v_start; i < q_vectors; i++) {
 419                 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
 420                 for (j = 0; j < rqpv; j++) {
 421                         i40evf_map_vector_to_rxq(adapter, i, rxr_idx);
 422                         rxr_idx++;
 423                         rxr_remaining--;
 424                 }
 425         }
 426         for (i = v_start; i < q_vectors; i++) {
 427                 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
 428                 for (j = 0; j < tqpv; j++) {
 429                         i40evf_map_vector_to_txq(adapter, i, txr_idx);
 430                         txr_idx++;
 431                         txr_remaining--;
 432                 }
 433         }
 434
 435 out:
 436         adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
 437
 438         return err;
 439 }
 440
 441 /**
 442  * i40evf_request_traffic_irqs - Initialize MSI-X interrupts
 443  * @adapter: board private structure
 444  *
 445  * Allocates MSI-X vectors for tx and rx handling, and requests
 446  * interrupts from the kernel.
 447  **/
 448 static int
 449 i40evf_request_traffic_irqs(struct i40evf_adapter *adapter, char *basename)
 450 {
 451         int vector, err, q_vectors;
 452         int rx_int_idx = 0, tx_int_idx = 0;
 453
 454         i40evf_irq_disable(adapter);
 455         /* Decrement for Other and TCP Timer vectors */
 456         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 457
 458         for (vector = 0; vector < q_vectors; vector++) {
 459                 struct i40e_q_vector *q_vector = adapter->q_vector[vector];
 460
 461                 if (q_vector->tx.ring && q_vector->rx.ring) {
 462                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 463                                  "i40evf-%s-%s-%d", basename,
 464                                  "TxRx", rx_int_idx++);
 465                         tx_int_idx++;
 466                 } else if (q_vector->rx.ring) {
 467                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 468                                  "i40evf-%s-%s-%d", basename,
 469                                  "rx", rx_int_idx++);
 470                 } else if (q_vector->tx.ring) {
 471                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 472                                  "i40evf-%s-%s-%d", basename,
 473                                  "tx", tx_int_idx++);
 474                 } else {
 475                         /* skip this unused q_vector */
 476                         continue;
 477                 }
 478                 err = request_irq(
 479                         adapter->msix_entries[vector + NONQ_VECS].vector,
 480                         i40evf_msix_clean_rings,
 481                         0,
 482                         q_vector->name,
 483                         q_vector);
 484                 if (err) {
 485                         dev_info(&adapter->pdev->dev,
 486                                  "%s: request_irq failed, error: %d\n",
 487                                 __func__, err);
 488                         goto free_queue_irqs;
 489                 }
 490                 /* assign the mask for this irq */
 491                 irq_set_affinity_hint(
 492                         adapter->msix_entries[vector + NONQ_VECS].vector,
 493                         q_vector->affinity_mask);
 494         }
 495
 496         return 0;
 497
 498 free_queue_irqs:
 499         while (vector) {
 500                 vector--;
 501                 irq_set_affinity_hint(
 502                         adapter->msix_entries[vector + NONQ_VECS].vector,
 503                         NULL);
 504                 free_irq(adapter->msix_entries[vector + NONQ_VECS].vector,
 505                          adapter->q_vector[vector]);
 506         }
 507         return err;
 508 }
 509
 510 /**
 511  * i40evf_request_misc_irq - Initialize MSI-X interrupts
 512  * @adapter: board private structure
 513  *
 514  * Allocates MSI-X vector 0 and requests interrupts from the kernel. This
 515  * vector is only for the admin queue, and stays active even when the netdev
 516  * is closed.
 517  **/
 518 static int i40evf_request_misc_irq(struct i40evf_adapter *adapter)
 519 {
 520         struct net_device *netdev = adapter->netdev;
 521         int err;
 522
 523         sprintf(adapter->misc_vector_name, "i40evf:mbx");
 524         err = request_irq(adapter->msix_entries[0].vector,
 525                           &i40evf_msix_aq, 0,
 526                           adapter->misc_vector_name, netdev);
 527         if (err) {
 528                 dev_err(&adapter->pdev->dev,
 529                         "request_irq for %s failed: %d\n",
 530                         adapter->misc_vector_name, err);
 531                 free_irq(adapter->msix_entries[0].vector, netdev);
 532         }
 533         return err;
 534 }
 535
 536 /**
 537  * i40evf_free_traffic_irqs - Free MSI-X interrupts
 538  * @adapter: board private structure
 539  *
 540  * Frees all MSI-X vectors other than 0.
 541  **/
 542 static void i40evf_free_traffic_irqs(struct i40evf_adapter *adapter)
 543 {
 544         int i;
 545         int q_vectors;
 546         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 547
 548         for (i = 0; i < q_vectors; i++) {
 549                 irq_set_affinity_hint(adapter->msix_entries[i+1].vector,
 550                                       NULL);
 551                 free_irq(adapter->msix_entries[i+1].vector,
 552                          adapter->q_vector[i]);
 553         }
 554 }
 555
 556 /**
 557  * i40evf_free_misc_irq - Free MSI-X miscellaneous vector
 558  * @adapter: board private structure
 559  *
 560  * Frees MSI-X vector 0.
 561  **/
 562 static void i40evf_free_misc_irq(struct i40evf_adapter *adapter)
 563 {
 564         struct net_device *netdev = adapter->netdev;
 565
 566         free_irq(adapter->msix_entries[0].vector, netdev);
 567 }
 568
 569 /**
 570  * i40evf_configure_tx - Configure Transmit Unit after Reset
 571  * @adapter: board private structure
 572  *
 573  * Configure the Tx unit of the MAC after a reset.
 574  **/
 575 static void i40evf_configure_tx(struct i40evf_adapter *adapter)
 576 {
 577         struct i40e_hw *hw = &adapter->hw;
 578         int i;
 579         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
 580                 adapter->tx_rings[i]->tail = hw->hw_addr + I40E_QTX_TAIL1(i);
 581 }
 582
 583 /**
 584  * i40evf_configure_rx - Configure Receive Unit after Reset
 585  * @adapter: board private structure
 586  *
 587  * Configure the Rx unit of the MAC after a reset.
 588  **/
 589 static void i40evf_configure_rx(struct i40evf_adapter *adapter)
 590 {
 591         struct i40e_hw *hw = &adapter->hw;
 592         struct net_device *netdev = adapter->netdev;
 593         int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
 594         int i;
 595         int rx_buf_len;
 596
 597
 598         adapter->flags &= ~I40EVF_FLAG_RX_PS_CAPABLE;
 599         adapter->flags |= I40EVF_FLAG_RX_1BUF_CAPABLE;
 600
 601         /* Decide whether to use packet split mode or not */
 602         if (netdev->mtu > ETH_DATA_LEN) {
 603                 if (adapter->flags & I40EVF_FLAG_RX_PS_CAPABLE)
 604                         adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
 605                 else
 606                         adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
 607         } else {
 608                 if (adapter->flags & I40EVF_FLAG_RX_1BUF_CAPABLE)
 609                         adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
 610                 else
 611                         adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
 612         }
 613
 614         /* Set the RX buffer length according to the mode */
 615         if (adapter->flags & I40EVF_FLAG_RX_PS_ENABLED) {
 616                 rx_buf_len = I40E_RX_HDR_SIZE;
 617         } else {
 618                 if (netdev->mtu <= ETH_DATA_LEN)
 619                         rx_buf_len = I40EVF_RXBUFFER_2048;
 620                 else
 621                         rx_buf_len = ALIGN(max_frame, 1024);
 622         }
 623
 624         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
 625                 adapter->rx_rings[i]->tail = hw->hw_addr + I40E_QRX_TAIL1(i);
 626                 adapter->rx_rings[i]->rx_buf_len = rx_buf_len;
 627         }
 628 }
 629
 630 /**
 631  * i40evf_find_vlan - Search filter list for specific vlan filter
 632  * @adapter: board private structure
 633  * @vlan: vlan tag
 634  *
 635  * Returns ptr to the filter object or NULL
 636  **/
 637 static struct
 638 i40evf_vlan_filter *i40evf_find_vlan(struct i40evf_adapter *adapter, u16 vlan)
 639 {
 640         struct i40evf_vlan_filter *f;
 641
 642         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
 643                 if (vlan == f->vlan)
 644                         return f;
 645         }
 646         return NULL;
 647 }
 648
 649 /**
 650  * i40evf_add_vlan - Add a vlan filter to the list
 651  * @adapter: board private structure
 652  * @vlan: VLAN tag
 653  *
 654  * Returns ptr to the filter object or NULL when no memory available.
 655  **/
 656 static struct
 657 i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan)
 658 {
 659         struct i40evf_vlan_filter *f;
 660
 661         f = i40evf_find_vlan(adapter, vlan);
 662         if (NULL == f) {
 663                 f = kzalloc(sizeof(*f), GFP_ATOMIC);
 664                 if (NULL == f)
 665                         return NULL;
 666
 667                 f->vlan = vlan;
 668
 669                 INIT_LIST_HEAD(&f->list);
 670                 list_add(&f->list, &adapter->vlan_filter_list);
 671                 f->add = true;
 672                 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
 673         }
 674
 675         return f;
 676 }
 677
 678 /**
 679  * i40evf_del_vlan - Remove a vlan filter from the list
 680  * @adapter: board private structure
 681  * @vlan: VLAN tag
 682  **/
 683 static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan)
 684 {
 685         struct i40evf_vlan_filter *f;
 686
 687         f = i40evf_find_vlan(adapter, vlan);
 688         if (f) {
 689                 f->remove = true;
 690                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
 691         }
 692 }
 693
 694 /**
 695  * i40evf_vlan_rx_add_vid - Add a VLAN filter to a device
 696  * @netdev: network device struct
 697  * @vid: VLAN tag
 698  **/
 699 static int i40evf_vlan_rx_add_vid(struct net_device *netdev,
 700                          __always_unused __be16 proto, u16 vid)
 701 {
 702         struct i40evf_adapter *adapter = netdev_priv(netdev);
 703
 704         if (i40evf_add_vlan(adapter, vid) == NULL)
 705                 return -ENOMEM;
 706         return 0;
 707 }
 708
 709 /**
 710  * i40evf_vlan_rx_kill_vid - Remove a VLAN filter from a device
 711  * @netdev: network device struct
 712  * @vid: VLAN tag
 713  **/
 714 static int i40evf_vlan_rx_kill_vid(struct net_device *netdev,
 715                           __always_unused __be16 proto, u16 vid)
 716 {
 717         struct i40evf_adapter *adapter = netdev_priv(netdev);
 718
 719         i40evf_del_vlan(adapter, vid);
 720         return 0;
 721 }
 722
 723 /**
 724  * i40evf_find_filter - Search filter list for specific mac filter
 725  * @adapter: board private structure
 726  * @macaddr: the MAC address
 727  *
 728  * Returns ptr to the filter object or NULL
 729  **/
 730 static struct
 731 i40evf_mac_filter *i40evf_find_filter(struct i40evf_adapter *adapter,
 732                                       u8 *macaddr)
 733 {
 734         struct i40evf_mac_filter *f;
 735
 736         if (!macaddr)
 737                 return NULL;
 738
 739         list_for_each_entry(f, &adapter->mac_filter_list, list) {
 740                 if (ether_addr_equal(macaddr, f->macaddr))
 741                         return f;
 742         }
 743         return NULL;
 744 }
 745
 746 /**
 747  * i40e_add_filter - Add a mac filter to the filter list
 748  * @adapter: board private structure
 749  * @macaddr: the MAC address
 750  *
 751  * Returns ptr to the filter object or NULL when no memory available.
 752  **/
 753 static struct
 754 i40evf_mac_filter *i40evf_add_filter(struct i40evf_adapter *adapter,
 755                                      u8 *macaddr)
 756 {
 757         struct i40evf_mac_filter *f;
 758
 759         if (!macaddr)
 760                 return NULL;
 761
 762         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 763                                 &adapter->crit_section))
 764                 mdelay(1);
 765
 766         f = i40evf_find_filter(adapter, macaddr);
 767         if (NULL == f) {
 768                 f = kzalloc(sizeof(*f), GFP_ATOMIC);
 769                 if (NULL == f) {
 770                         clear_bit(__I40EVF_IN_CRITICAL_TASK,
 771                                   &adapter->crit_section);
 772                         return NULL;
 773                 }
 774
 775                 memcpy(f->macaddr, macaddr, ETH_ALEN);
 776
 777                 list_add(&f->list, &adapter->mac_filter_list);
 778                 f->add = true;
 779                 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
 780         }
 781
 782         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 783         return f;
 784 }
 785
 786 /**
 787  * i40evf_set_mac - NDO callback to set port mac address
 788  * @netdev: network interface device structure
 789  * @p: pointer to an address structure
 790  *
 791  * Returns 0 on success, negative on failure
 792  **/
 793 static int i40evf_set_mac(struct net_device *netdev, void *p)
 794 {
 795         struct i40evf_adapter *adapter = netdev_priv(netdev);
 796         struct i40e_hw *hw = &adapter->hw;
 797         struct i40evf_mac_filter *f;
 798         struct sockaddr *addr = p;
 799
 800         if (!is_valid_ether_addr(addr->sa_data))
 801                 return -EADDRNOTAVAIL;
 802
 803         if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
 804                 return 0;
 805
 806         f = i40evf_add_filter(adapter, addr->sa_data);
 807         if (f) {
 808                 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
 809                 memcpy(netdev->dev_addr, adapter->hw.mac.addr,
 810                        netdev->addr_len);
 811         }
 812
 813         return (f == NULL) ? -ENOMEM : 0;
 814 }
 815
 816 /**
 817  * i40evf_set_rx_mode - NDO callback to set the netdev filters
 818  * @netdev: network interface device structure
 819  **/
 820 static void i40evf_set_rx_mode(struct net_device *netdev)
 821 {
 822         struct i40evf_adapter *adapter = netdev_priv(netdev);
 823         struct i40evf_mac_filter *f, *ftmp;
 824         struct netdev_hw_addr *uca;
 825         struct netdev_hw_addr *mca;
 826
 827         /* add addr if not already in the filter list */
 828         netdev_for_each_uc_addr(uca, netdev) {
 829                 i40evf_add_filter(adapter, uca->addr);
 830         }
 831         netdev_for_each_mc_addr(mca, netdev) {
 832                 i40evf_add_filter(adapter, mca->addr);
 833         }
 834
 835         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 836                                 &adapter->crit_section))
 837                 mdelay(1);
 838         /* remove filter if not in netdev list */
 839         list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
 840                 bool found = false;
 841
 842                 if (is_multicast_ether_addr(f->macaddr)) {
 843                         netdev_for_each_mc_addr(mca, netdev) {
 844                                 if (ether_addr_equal(mca->addr, f->macaddr)) {
 845                                         found = true;
 846                                         break;
 847                                 }
 848                         }
 849                 } else {
 850                         netdev_for_each_uc_addr(uca, netdev) {
 851                                 if (ether_addr_equal(uca->addr, f->macaddr)) {
 852                                         found = true;
 853                                         break;
 854                                 }
 855                         }
 856                 }
 857                 if (found) {
 858                         f->remove = true;
 859                         adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
 860                 }
 861         }
 862         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 863 }
 864
 865 /**
 866  * i40evf_napi_enable_all - enable NAPI on all queue vectors
 867  * @adapter: board private structure
 868  **/
 869 static void i40evf_napi_enable_all(struct i40evf_adapter *adapter)
 870 {
 871         int q_idx;
 872         struct i40e_q_vector *q_vector;
 873         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 874
 875         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
 876                 struct napi_struct *napi;
 877                 q_vector = adapter->q_vector[q_idx];
 878                 napi = &q_vector->napi;
 879                 napi_enable(napi);
 880         }
 881 }
 882
 883 /**
 884  * i40evf_napi_disable_all - disable NAPI on all queue vectors
 885  * @adapter: board private structure
 886  **/
 887 static void i40evf_napi_disable_all(struct i40evf_adapter *adapter)
 888 {
 889         int q_idx;
 890         struct i40e_q_vector *q_vector;
 891         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 892
 893         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
 894                 q_vector = adapter->q_vector[q_idx];
 895                 napi_disable(&q_vector->napi);
 896         }
 897 }
 898
 899 /**
 900  * i40evf_configure - set up transmit and receive data structures
 901  * @adapter: board private structure
 902  **/
 903 static void i40evf_configure(struct i40evf_adapter *adapter)
 904 {
 905         struct net_device *netdev = adapter->netdev;
 906         int i;
 907
 908         i40evf_set_rx_mode(netdev);
 909
 910         i40evf_configure_tx(adapter);
 911         i40evf_configure_rx(adapter);
 912         adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
 913
 914         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
 915                 struct i40e_ring *ring = adapter->rx_rings[i];
 916                 i40evf_alloc_rx_buffers(ring, ring->count);
 917                 ring->next_to_use = ring->count - 1;
 918                 writel(ring->next_to_use, ring->tail);
 919         }
 920 }
 921
 922 /**
 923  * i40evf_up_complete - Finish the last steps of bringing up a connection
 924  * @adapter: board private structure
 925  **/
 926 static int i40evf_up_complete(struct i40evf_adapter *adapter)
 927 {
 928         adapter->state = __I40EVF_RUNNING;
 929         clear_bit(__I40E_DOWN, &adapter->vsi.state);
 930
 931         i40evf_napi_enable_all(adapter);
 932
 933         adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES;
 934         mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
 935         return 0;
 936 }
 937
 938 /**
 939  * i40evf_clean_all_rx_rings - Free Rx Buffers for all queues
 940  * @adapter: board private structure
 941  **/
 942 static void i40evf_clean_all_rx_rings(struct i40evf_adapter *adapter)
 943 {
 944         int i;
 945
 946         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
 947                 i40evf_clean_rx_ring(adapter->rx_rings[i]);
 948 }
 949
 950 /**
 951  * i40evf_clean_all_tx_rings - Free Tx Buffers for all queues
 952  * @adapter: board private structure
 953  **/
 954 static void i40evf_clean_all_tx_rings(struct i40evf_adapter *adapter)
 955 {
 956         int i;
 957
 958         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
 959                 i40evf_clean_tx_ring(adapter->tx_rings[i]);
 960 }
 961
 962 /**
 963  * i40e_down - Shutdown the connection processing
 964  * @adapter: board private structure
 965  **/
 966 void i40evf_down(struct i40evf_adapter *adapter)
 967 {
 968         struct net_device *netdev = adapter->netdev;
 969         struct i40evf_mac_filter *f;
 970
 971         /* remove all MAC filters */
 972         list_for_each_entry(f, &adapter->mac_filter_list, list) {
 973                 f->remove = true;
 974         }
 975         /* remove all VLAN filters */
 976         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
 977                 f->remove = true;
 978         }
 979         if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) &&
 980             adapter->state != __I40EVF_RESETTING) {
 981                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
 982                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
 983                 /* disable receives */
 984                 adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
 985                 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
 986                 msleep(20);
 987         }
 988         netif_tx_disable(netdev);
 989
 990         netif_tx_stop_all_queues(netdev);
 991
 992         i40evf_irq_disable(adapter);
 993
 994         i40evf_napi_disable_all(adapter);
 995
 996         netif_carrier_off(netdev);
 997
 998         i40evf_clean_all_tx_rings(adapter);
 999         i40evf_clean_all_rx_rings(adapter);
1000 }
1001
1002 /**
1003  * i40evf_acquire_msix_vectors - Setup the MSIX capability
1004  * @adapter: board private structure
1005  * @vectors: number of vectors to request
1006  *
1007  * Work with the OS to set up the MSIX vectors needed.
1008  *
1009  * Returns 0 on success, negative on failure
1010  **/
1011 static int
1012 i40evf_acquire_msix_vectors(struct i40evf_adapter *adapter, int vectors)
1013 {
1014         int err, vector_threshold;
1015
1016         /* We'll want at least 3 (vector_threshold):
1017          * 0) Other (Admin Queue and link, mostly)
1018          * 1) TxQ[0] Cleanup
1019          * 2) RxQ[0] Cleanup
1020          */
1021         vector_threshold = MIN_MSIX_COUNT;
1022
1023         /* The more we get, the more we will assign to Tx/Rx Cleanup
1024          * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1025          * Right now, we simply care about how many we'll get; we'll
1026          * set them up later while requesting irq's.
1027          */
1028         err = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
1029                                     vector_threshold, vectors);
1030         if (err < 0) {
1031                 dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts\n");
1032                 kfree(adapter->msix_entries);
1033                 adapter->msix_entries = NULL;
1034                 return err;
1035         }
1036
1037         /* Adjust for only the vectors we'll use, which is minimum
1038          * of max_msix_q_vectors + NONQ_VECS, or the number of
1039          * vectors we were allocated.
1040          */
1041         adapter->num_msix_vectors = err;
1042         return 0;
1043 }
1044
1045 /**
1046  * i40evf_free_queues - Free memory for all rings
1047  * @adapter: board private structure to initialize
1048  *
1049  * Free all of the memory associated with queue pairs.
1050  **/
1051 static void i40evf_free_queues(struct i40evf_adapter *adapter)
1052 {
1053         int i;
1054
1055         if (!adapter->vsi_res)
1056                 return;
1057         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1058                 if (adapter->tx_rings[i])
1059                         kfree_rcu(adapter->tx_rings[i], rcu);
1060                 adapter->tx_rings[i] = NULL;
1061                 adapter->rx_rings[i] = NULL;
1062         }
1063 }
1064
1065 /**
1066  * i40evf_alloc_queues - Allocate memory for all rings
1067  * @adapter: board private structure to initialize
1068  *
1069  * We allocate one ring per queue at run-time since we don't know the
1070  * number of queues at compile-time.  The polling_netdev array is
1071  * intended for Multiqueue, but should work fine with a single queue.
1072  **/
1073 static int i40evf_alloc_queues(struct i40evf_adapter *adapter)
1074 {
1075         int i;
1076
1077         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1078                 struct i40e_ring *tx_ring;
1079                 struct i40e_ring *rx_ring;
1080
1081                 tx_ring = kzalloc(sizeof(struct i40e_ring) * 2, GFP_KERNEL);
1082                 if (!tx_ring)
1083                         goto err_out;
1084
1085                 tx_ring->queue_index = i;
1086                 tx_ring->netdev = adapter->netdev;
1087                 tx_ring->dev = &adapter->pdev->dev;
1088                 tx_ring->count = adapter->tx_desc_count;
1089                 adapter->tx_rings[i] = tx_ring;
1090
1091                 rx_ring = &tx_ring[1];
1092                 rx_ring->queue_index = i;
1093                 rx_ring->netdev = adapter->netdev;
1094                 rx_ring->dev = &adapter->pdev->dev;
1095                 rx_ring->count = adapter->rx_desc_count;
1096                 adapter->rx_rings[i] = rx_ring;
1097         }
1098
1099         return 0;
1100
1101 err_out:
1102         i40evf_free_queues(adapter);
1103         return -ENOMEM;
1104 }
1105
1106 /**
1107  * i40evf_set_interrupt_capability - set MSI-X or FAIL if not supported
1108  * @adapter: board private structure to initialize
1109  *
1110  * Attempt to configure the interrupts using the best available
1111  * capabilities of the hardware and the kernel.
1112  **/
1113 static int i40evf_set_interrupt_capability(struct i40evf_adapter *adapter)
1114 {
1115         int vector, v_budget;
1116         int pairs = 0;
1117         int err = 0;
1118
1119         if (!adapter->vsi_res) {
1120                 err = -EIO;
1121                 goto out;
1122         }
1123         pairs = adapter->vsi_res->num_queue_pairs;
1124
1125         /* It's easy to be greedy for MSI-X vectors, but it really
1126          * doesn't do us much good if we have a lot more vectors
1127          * than CPU's.  So let's be conservative and only ask for
1128          * (roughly) twice the number of vectors as there are CPU's.
1129          */
1130         v_budget = min_t(int, pairs, (int)(num_online_cpus() * 2)) + NONQ_VECS;
1131         v_budget = min_t(int, v_budget, (int)adapter->vf_res->max_vectors);
1132
1133         adapter->msix_entries = kcalloc(v_budget,
1134                                         sizeof(struct msix_entry), GFP_KERNEL);
1135         if (!adapter->msix_entries) {
1136                 err = -ENOMEM;
1137                 goto out;
1138         }
1139
1140         for (vector = 0; vector < v_budget; vector++)
1141                 adapter->msix_entries[vector].entry = vector;
1142
1143         i40evf_acquire_msix_vectors(adapter, v_budget);
1144
1145 out:
1146         adapter->netdev->real_num_tx_queues = pairs;
1147         return err;
1148 }
1149
1150 /**
1151  * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors
1152  * @adapter: board private structure to initialize
1153  *
1154  * We allocate one q_vector per queue interrupt.  If allocation fails we
1155  * return -ENOMEM.
1156  **/
1157 static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
1158 {
1159         int q_idx, num_q_vectors;
1160         struct i40e_q_vector *q_vector;
1161
1162         num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1163
1164         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1165                 q_vector = kzalloc(sizeof(struct i40e_q_vector), GFP_KERNEL);
1166                 if (!q_vector)
1167                         goto err_out;
1168                 q_vector->adapter = adapter;
1169                 q_vector->vsi = &adapter->vsi;
1170                 q_vector->v_idx = q_idx;
1171                 netif_napi_add(adapter->netdev, &q_vector->napi,
1172                                        i40evf_napi_poll, NAPI_POLL_WEIGHT);
1173                 adapter->q_vector[q_idx] = q_vector;
1174         }
1175
1176         return 0;
1177
1178 err_out:
1179         while (q_idx) {
1180                 q_idx--;
1181                 q_vector = adapter->q_vector[q_idx];
1182                 netif_napi_del(&q_vector->napi);
1183                 kfree(q_vector);
1184                 adapter->q_vector[q_idx] = NULL;
1185         }
1186         return -ENOMEM;
1187 }
1188
1189 /**
1190  * i40evf_free_q_vectors - Free memory allocated for interrupt vectors
1191  * @adapter: board private structure to initialize
1192  *
1193  * This function frees the memory allocated to the q_vectors.  In addition if
1194  * NAPI is enabled it will delete any references to the NAPI struct prior
1195  * to freeing the q_vector.
1196  **/
1197 static void i40evf_free_q_vectors(struct i40evf_adapter *adapter)
1198 {
1199         int q_idx, num_q_vectors;
1200         int napi_vectors;
1201
1202         num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1203         napi_vectors = adapter->vsi_res->num_queue_pairs;
1204
1205         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1206                 struct i40e_q_vector *q_vector = adapter->q_vector[q_idx];
1207
1208                 adapter->q_vector[q_idx] = NULL;
1209                 if (q_idx < napi_vectors)
1210                         netif_napi_del(&q_vector->napi);
1211                 kfree(q_vector);
1212         }
1213 }
1214
1215 /**
1216  * i40evf_reset_interrupt_capability - Reset MSIX setup
1217  * @adapter: board private structure
1218  *
1219  **/
1220 void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
1221 {
1222         pci_disable_msix(adapter->pdev);
1223         kfree(adapter->msix_entries);
1224         adapter->msix_entries = NULL;
1225 }
1226
1227 /**
1228  * i40evf_init_interrupt_scheme - Determine if MSIX is supported and init
1229  * @adapter: board private structure to initialize
1230  *
1231  **/
1232 int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter)
1233 {
1234         int err;
1235
1236         err = i40evf_set_interrupt_capability(adapter);
1237         if (err) {
1238                 dev_err(&adapter->pdev->dev,
1239                         "Unable to setup interrupt capabilities\n");
1240                 goto err_set_interrupt;
1241         }
1242
1243         err = i40evf_alloc_q_vectors(adapter);
1244         if (err) {
1245                 dev_err(&adapter->pdev->dev,
1246                         "Unable to allocate memory for queue vectors\n");
1247                 goto err_alloc_q_vectors;
1248         }
1249
1250         err = i40evf_alloc_queues(adapter);
1251         if (err) {
1252                 dev_err(&adapter->pdev->dev,
1253                         "Unable to allocate memory for queues\n");
1254                 goto err_alloc_queues;
1255         }
1256
1257         dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
1258                 (adapter->vsi_res->num_queue_pairs > 1) ? "Enabled" :
1259                 "Disabled", adapter->vsi_res->num_queue_pairs);
1260
1261         return 0;
1262 err_alloc_queues:
1263         i40evf_free_q_vectors(adapter);
1264 err_alloc_q_vectors:
1265         i40evf_reset_interrupt_capability(adapter);
1266 err_set_interrupt:
1267         return err;
1268 }
1269
1270 /**
1271  * i40evf_watchdog_timer - Periodic call-back timer
1272  * @data: pointer to adapter disguised as unsigned long
1273  **/
1274 static void i40evf_watchdog_timer(unsigned long data)
1275 {
1276         struct i40evf_adapter *adapter = (struct i40evf_adapter *)data;
1277         schedule_work(&adapter->watchdog_task);
1278         /* timer will be rescheduled in watchdog task */
1279 }
1280
1281 /**
1282  * i40evf_watchdog_task - Periodic call-back task
1283  * @work: pointer to work_struct
1284  **/
1285 static void i40evf_watchdog_task(struct work_struct *work)
1286 {
1287         struct i40evf_adapter *adapter = container_of(work,
1288                                           struct i40evf_adapter,
1289                                           watchdog_task);
1290         struct i40e_hw *hw = &adapter->hw;
1291
1292         if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
1293                 goto restart_watchdog;
1294
1295         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1296                 if ((rd32(hw, I40E_VFGEN_RSTAT) & 0x3) == I40E_VFR_VFACTIVE) {
1297                         /* A chance for redemption! */
1298                         dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
1299                         adapter->state = __I40EVF_STARTUP;
1300                         adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1301                         schedule_delayed_work(&adapter->init_task, 10);
1302                         clear_bit(__I40EVF_IN_CRITICAL_TASK,
1303                                   &adapter->crit_section);
1304                         /* Don't reschedule the watchdog, since we've restarted
1305                          * the init task. When init_task contacts the PF and
1306                          * gets everything set up again, it'll restart the
1307                          * watchdog for us. Down, boy. Sit. Stay. Woof.
1308                          */
1309                         return;
1310                 }
1311                 adapter->aq_pending = 0;
1312                 adapter->aq_required = 0;
1313                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1314                 goto watchdog_done;
1315         }
1316
1317         if ((adapter->state < __I40EVF_DOWN) ||
1318             (adapter->flags & I40EVF_FLAG_RESET_PENDING))
1319                 goto watchdog_done;
1320
1321         /* check for reset */
1322         if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) &&
1323             (rd32(hw, I40E_VFGEN_RSTAT) & 0x3) != I40E_VFR_VFACTIVE) {
1324                 adapter->state = __I40EVF_RESETTING;
1325                 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1326                 dev_err(&adapter->pdev->dev, "Hardware reset detected\n");
1327                 schedule_work(&adapter->reset_task);
1328                 adapter->aq_pending = 0;
1329                 adapter->aq_required = 0;
1330                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1331                 goto watchdog_done;
1332         }
1333
1334         /* Process admin queue tasks. After init, everything gets done
1335          * here so we don't race on the admin queue.
1336          */
1337         if (adapter->aq_pending)
1338                 goto watchdog_done;
1339
1340         if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
1341                 i40evf_map_queues(adapter);
1342                 goto watchdog_done;
1343         }
1344
1345         if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
1346                 i40evf_add_ether_addrs(adapter);
1347                 goto watchdog_done;
1348         }
1349
1350         if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
1351                 i40evf_add_vlans(adapter);
1352                 goto watchdog_done;
1353         }
1354
1355         if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
1356                 i40evf_del_ether_addrs(adapter);
1357                 goto watchdog_done;
1358         }
1359
1360         if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
1361                 i40evf_del_vlans(adapter);
1362                 goto watchdog_done;
1363         }
1364
1365         if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
1366                 i40evf_disable_queues(adapter);
1367                 goto watchdog_done;
1368         }
1369
1370         if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
1371                 i40evf_configure_queues(adapter);
1372                 goto watchdog_done;
1373         }
1374
1375         if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
1376                 i40evf_enable_queues(adapter);
1377                 goto watchdog_done;
1378         }
1379
1380         if (adapter->state == __I40EVF_RUNNING)
1381                 i40evf_request_stats(adapter);
1382
1383         i40evf_irq_enable(adapter, true);
1384         i40evf_fire_sw_int(adapter, 0xFF);
1385
1386 watchdog_done:
1387         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1388 restart_watchdog:
1389         if (adapter->aq_required)
1390                 mod_timer(&adapter->watchdog_timer,
1391                           jiffies + msecs_to_jiffies(20));
1392         else
1393                 mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
1394         schedule_work(&adapter->adminq_task);
1395 }
1396
1397 /**
1398  * i40evf_configure_rss - increment to next available tx queue
1399  * @adapter: board private structure
1400  * @j: queue counter
1401  *
1402  * Helper function for RSS programming to increment through available
1403  * queus. Returns the next queue value.
1404  **/
1405 static int next_queue(struct i40evf_adapter *adapter, int j)
1406 {
1407         j += 1;
1408
1409         return j >= adapter->vsi_res->num_queue_pairs ? 0 : j;
1410 }
1411
1412 /**
1413  * i40evf_configure_rss - Prepare for RSS if used
1414  * @adapter: board private structure
1415  **/
1416 static void i40evf_configure_rss(struct i40evf_adapter *adapter)
1417 {
1418         struct i40e_hw *hw = &adapter->hw;
1419         u32 lut = 0;
1420         int i, j;
1421         u64 hena;
1422
1423         /* Set of random keys generated using kernel random number generator */
1424         static const u32 seed[I40E_VFQF_HKEY_MAX_INDEX + 1] = {
1425                         0x794221b4, 0xbca0c5ab, 0x6cd5ebd9, 0x1ada6127,
1426                         0x983b3aa1, 0x1c4e71eb, 0x7f6328b2, 0xfcdc0da0,
1427                         0xc135cafa, 0x7a6f7e2d, 0xe7102d28, 0x163cd12e,
1428                         0x4954b126 };
1429
1430         /* Hash type is configured by the PF - we just supply the key */
1431
1432         /* Fill out hash function seed */
1433         for (i = 0; i <= I40E_VFQF_HKEY_MAX_INDEX; i++)
1434                 wr32(hw, I40E_VFQF_HKEY(i), seed[i]);
1435
1436         /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
1437         hena = I40E_DEFAULT_RSS_HENA;
1438         wr32(hw, I40E_VFQF_HENA(0), (u32)hena);
1439         wr32(hw, I40E_VFQF_HENA(1), (u32)(hena >> 32));
1440
1441         /* Populate the LUT with max no. of queues in round robin fashion */
1442         j = adapter->vsi_res->num_queue_pairs;
1443         for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++) {
1444                 j = next_queue(adapter, j);
1445                 lut = j;
1446                 j = next_queue(adapter, j);
1447                 lut |= j << 8;
1448                 j = next_queue(adapter, j);
1449                 lut |= j << 16;
1450                 j = next_queue(adapter, j);
1451                 lut |= j << 24;
1452                 wr32(hw, I40E_VFQF_HLUT(i), lut);
1453         }
1454         i40e_flush(hw);
1455 }
1456
1457 #define I40EVF_RESET_WAIT_MS 100
1458 #define I40EVF_RESET_WAIT_COUNT 200
1459 /**
1460  * i40evf_reset_task - Call-back task to handle hardware reset
1461  * @work: pointer to work_struct
1462  *
1463  * During reset we need to shut down and reinitialize the admin queue
1464  * before we can use it to communicate with the PF again. We also clear
1465  * and reinit the rings because that context is lost as well.
1466  **/
1467 static void i40evf_reset_task(struct work_struct *work)
1468 {
1469         struct i40evf_adapter *adapter = container_of(work,
1470                                                       struct i40evf_adapter,
1471                                                       reset_task);
1472         struct i40e_hw *hw = &adapter->hw;
1473         int i = 0, err;
1474         uint32_t rstat_val;
1475
1476         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1477                                 &adapter->crit_section))
1478                 udelay(500);
1479
1480         if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) {
1481                 dev_info(&adapter->pdev->dev, "Requesting reset from PF\n");
1482                 i40evf_request_reset(adapter);
1483         }
1484
1485         /* poll until we see the reset actually happen */
1486         for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1487                 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1488                             I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1489                 if (rstat_val != I40E_VFR_VFACTIVE)
1490                         break;
1491                 else
1492                         msleep(I40EVF_RESET_WAIT_MS);
1493         }
1494         if (i == I40EVF_RESET_WAIT_COUNT) {
1495                 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1496                 goto continue_reset; /* act like the reset happened */
1497         }
1498
1499         /* wait until the reset is complete and the PF is responding to us */
1500         for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1501                 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1502                             I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1503                 if (rstat_val == I40E_VFR_VFACTIVE)
1504                         break;
1505                 else
1506                         msleep(I40EVF_RESET_WAIT_MS);
1507         }
1508         if (i == I40EVF_RESET_WAIT_COUNT) {
1509                 /* reset never finished */
1510                 dev_err(&adapter->pdev->dev, "Reset never finished (%x)\n",
1511                         rstat_val);
1512                 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
1513
1514                 if (netif_running(adapter->netdev)) {
1515                         set_bit(__I40E_DOWN, &adapter->vsi.state);
1516                         i40evf_down(adapter);
1517                         i40evf_free_traffic_irqs(adapter);
1518                         i40evf_free_all_tx_resources(adapter);
1519                         i40evf_free_all_rx_resources(adapter);
1520                 }
1521                 i40evf_free_misc_irq(adapter);
1522                 i40evf_reset_interrupt_capability(adapter);
1523                 i40evf_free_queues(adapter);
1524                 kfree(adapter->vf_res);
1525                 i40evf_shutdown_adminq(hw);
1526                 adapter->netdev->flags &= ~IFF_UP;
1527                 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1528                 return; /* Do not attempt to reinit. It's dead, Jim. */
1529         }
1530
1531 continue_reset:
1532         adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1533
1534         i40evf_down(adapter);
1535         adapter->state = __I40EVF_RESETTING;
1536
1537         /* kill and reinit the admin queue */
1538         if (i40evf_shutdown_adminq(hw))
1539                 dev_warn(&adapter->pdev->dev,
1540                         "%s: Failed to destroy the Admin Queue resources\n",
1541                         __func__);
1542         err = i40evf_init_adminq(hw);
1543         if (err)
1544                 dev_info(&adapter->pdev->dev, "%s: init_adminq failed: %d\n",
1545                         __func__, err);
1546
1547         adapter->aq_pending = 0;
1548         adapter->aq_required = 0;
1549         i40evf_map_queues(adapter);
1550         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1551
1552         mod_timer(&adapter->watchdog_timer, jiffies + 2);
1553
1554         if (netif_running(adapter->netdev)) {
1555                 /* allocate transmit descriptors */
1556                 err = i40evf_setup_all_tx_resources(adapter);
1557                 if (err)
1558                         goto reset_err;
1559
1560                 /* allocate receive descriptors */
1561                 err = i40evf_setup_all_rx_resources(adapter);
1562                 if (err)
1563                         goto reset_err;
1564
1565                 i40evf_configure(adapter);
1566
1567                 err = i40evf_up_complete(adapter);
1568                 if (err)
1569                         goto reset_err;
1570
1571                 i40evf_irq_enable(adapter, true);
1572         }
1573         return;
1574 reset_err:
1575         dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
1576         i40evf_close(adapter->netdev);
1577 }
1578
1579 /**
1580  * i40evf_adminq_task - worker thread to clean the admin queue
1581  * @work: pointer to work_struct containing our data
1582  **/
1583 static void i40evf_adminq_task(struct work_struct *work)
1584 {
1585         struct i40evf_adapter *adapter =
1586                 container_of(work, struct i40evf_adapter, adminq_task);
1587         struct i40e_hw *hw = &adapter->hw;
1588         struct i40e_arq_event_info event;
1589         struct i40e_virtchnl_msg *v_msg;
1590         i40e_status ret;
1591         u16 pending;
1592
1593         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
1594                 return;
1595
1596         event.msg_size = I40EVF_MAX_AQ_BUF_SIZE;
1597         event.msg_buf = kzalloc(event.msg_size, GFP_KERNEL);
1598         if (!event.msg_buf)
1599                 return;
1600
1601         v_msg = (struct i40e_virtchnl_msg *)&event.desc;
1602         do {
1603                 ret = i40evf_clean_arq_element(hw, &event, &pending);
1604                 if (ret)
1605                         break; /* No event to process or error cleaning ARQ */
1606
1607                 i40evf_virtchnl_completion(adapter, v_msg->v_opcode,
1608                                            v_msg->v_retval, event.msg_buf,
1609                                            event.msg_size);
1610                 if (pending != 0) {
1611                         dev_info(&adapter->pdev->dev,
1612                                  "%s: ARQ: Pending events %d\n",
1613                                  __func__, pending);
1614                         memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
1615                 }
1616         } while (pending);
1617
1618         /* re-enable Admin queue interrupt cause */
1619         i40evf_misc_irq_enable(adapter);
1620
1621         kfree(event.msg_buf);
1622 }
1623
1624 /**
1625  * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
1626  * @adapter: board private structure
1627  *
1628  * Free all transmit software resources
1629  **/
1630 static void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
1631 {
1632         int i;
1633
1634         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
1635                 if (adapter->tx_rings[i]->desc)
1636                         i40evf_free_tx_resources(adapter->tx_rings[i]);
1637
1638 }
1639
1640 /**
1641  * i40evf_setup_all_tx_resources - allocate all queues Tx resources
1642  * @adapter: board private structure
1643  *
1644  * If this function returns with an error, then it's possible one or
1645  * more of the rings is populated (while the rest are not).  It is the
1646  * callers duty to clean those orphaned rings.
1647  *
1648  * Return 0 on success, negative on failure
1649  **/
1650 static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter)
1651 {
1652         int i, err = 0;
1653
1654         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1655                 adapter->tx_rings[i]->count = adapter->tx_desc_count;
1656                 err = i40evf_setup_tx_descriptors(adapter->tx_rings[i]);
1657                 if (!err)
1658                         continue;
1659                 dev_err(&adapter->pdev->dev,
1660                         "%s: Allocation for Tx Queue %u failed\n",
1661                         __func__, i);
1662                 break;
1663         }
1664
1665         return err;
1666 }
1667
1668 /**
1669  * i40evf_setup_all_rx_resources - allocate all queues Rx resources
1670  * @adapter: board private structure
1671  *
1672  * If this function returns with an error, then it's possible one or
1673  * more of the rings is populated (while the rest are not).  It is the
1674  * callers duty to clean those orphaned rings.
1675  *
1676  * Return 0 on success, negative on failure
1677  **/
1678 static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter)
1679 {
1680         int i, err = 0;
1681
1682         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1683                 adapter->rx_rings[i]->count = adapter->rx_desc_count;
1684                 err = i40evf_setup_rx_descriptors(adapter->rx_rings[i]);
1685                 if (!err)
1686                         continue;
1687                 dev_err(&adapter->pdev->dev,
1688                         "%s: Allocation for Rx Queue %u failed\n",
1689                         __func__, i);
1690                 break;
1691         }
1692         return err;
1693 }
1694
1695 /**
1696  * i40evf_free_all_rx_resources - Free Rx Resources for All Queues
1697  * @adapter: board private structure
1698  *
1699  * Free all receive software resources
1700  **/
1701 static void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
1702 {
1703         int i;
1704
1705         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
1706                 if (adapter->rx_rings[i]->desc)
1707                         i40evf_free_rx_resources(adapter->rx_rings[i]);
1708 }
1709
1710 /**
1711  * i40evf_open - Called when a network interface is made active
1712  * @netdev: network interface device structure
1713  *
1714  * Returns 0 on success, negative value on failure
1715  *
1716  * The open entry point is called when a network interface is made
1717  * active by the system (IFF_UP).  At this point all resources needed
1718  * for transmit and receive operations are allocated, the interrupt
1719  * handler is registered with the OS, the watchdog timer is started,
1720  * and the stack is notified that the interface is ready.
1721  **/
1722 static int i40evf_open(struct net_device *netdev)
1723 {
1724         struct i40evf_adapter *adapter = netdev_priv(netdev);
1725         int err;
1726
1727         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1728                 dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
1729                 return -EIO;
1730         }
1731         if (adapter->state != __I40EVF_DOWN)
1732                 return -EBUSY;
1733
1734         /* allocate transmit descriptors */
1735         err = i40evf_setup_all_tx_resources(adapter);
1736         if (err)
1737                 goto err_setup_tx;
1738
1739         /* allocate receive descriptors */
1740         err = i40evf_setup_all_rx_resources(adapter);
1741         if (err)
1742                 goto err_setup_rx;
1743
1744         /* clear any pending interrupts, may auto mask */
1745         err = i40evf_request_traffic_irqs(adapter, netdev->name);
1746         if (err)
1747                 goto err_req_irq;
1748
1749         i40evf_configure(adapter);
1750
1751         err = i40evf_up_complete(adapter);
1752         if (err)
1753                 goto err_req_irq;
1754
1755         i40evf_irq_enable(adapter, true);
1756
1757         return 0;
1758
1759 err_req_irq:
1760         i40evf_down(adapter);
1761         i40evf_free_traffic_irqs(adapter);
1762 err_setup_rx:
1763         i40evf_free_all_rx_resources(adapter);
1764 err_setup_tx:
1765         i40evf_free_all_tx_resources(adapter);
1766
1767         return err;
1768 }
1769
1770 /**
1771  * i40evf_close - Disables a network interface
1772  * @netdev: network interface device structure
1773  *
1774  * Returns 0, this is not allowed to fail
1775  *
1776  * The close entry point is called when an interface is de-activated
1777  * by the OS.  The hardware is still under the drivers control, but
1778  * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
1779  * are freed, along with all transmit and receive resources.
1780  **/
1781 static int i40evf_close(struct net_device *netdev)
1782 {
1783         struct i40evf_adapter *adapter = netdev_priv(netdev);
1784
1785         if (adapter->state <= __I40EVF_DOWN)
1786                 return 0;
1787
1788         /* signal that we are down to the interrupt handler */
1789         adapter->state = __I40EVF_DOWN;
1790
1791         set_bit(__I40E_DOWN, &adapter->vsi.state);
1792
1793         i40evf_down(adapter);
1794         i40evf_free_traffic_irqs(adapter);
1795
1796         i40evf_free_all_tx_resources(adapter);
1797         i40evf_free_all_rx_resources(adapter);
1798
1799         return 0;
1800 }
1801
1802 /**
1803  * i40evf_get_stats - Get System Network Statistics
1804  * @netdev: network interface device structure
1805  *
1806  * Returns the address of the device statistics structure.
1807  * The statistics are actually updated from the timer callback.
1808  **/
1809 static struct net_device_stats *i40evf_get_stats(struct net_device *netdev)
1810 {
1811         struct i40evf_adapter *adapter = netdev_priv(netdev);
1812
1813         /* only return the current stats */
1814         return &adapter->net_stats;
1815 }
1816
1817 /**
1818  * i40evf_reinit_locked - Software reinit
1819  * @adapter: board private structure
1820  *
1821  * Reinititalizes the ring structures in response to a software configuration
1822  * change. Roughly the same as close followed by open, but skips releasing
1823  * and reallocating the interrupts.
1824  **/
1825 void i40evf_reinit_locked(struct i40evf_adapter *adapter)
1826 {
1827         struct net_device *netdev = adapter->netdev;
1828         int err;
1829
1830         WARN_ON(in_interrupt());
1831
1832         i40evf_down(adapter);
1833
1834         /* allocate transmit descriptors */
1835         err = i40evf_setup_all_tx_resources(adapter);
1836         if (err)
1837                 goto err_reinit;
1838
1839         /* allocate receive descriptors */
1840         err = i40evf_setup_all_rx_resources(adapter);
1841         if (err)
1842                 goto err_reinit;
1843
1844         i40evf_configure(adapter);
1845
1846         err = i40evf_up_complete(adapter);
1847         if (err)
1848                 goto err_reinit;
1849
1850         i40evf_irq_enable(adapter, true);
1851         return;
1852
1853 err_reinit:
1854         dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
1855         i40evf_close(netdev);
1856 }
1857
1858 /**
1859  * i40evf_change_mtu - Change the Maximum Transfer Unit
1860  * @netdev: network interface device structure
1861  * @new_mtu: new value for maximum frame size
1862  *
1863  * Returns 0 on success, negative on failure
1864  **/
1865 static int i40evf_change_mtu(struct net_device *netdev, int new_mtu)
1866 {
1867         struct i40evf_adapter *adapter = netdev_priv(netdev);
1868         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
1869
1870         if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
1871                 return -EINVAL;
1872
1873         /* must set new MTU before calling down or up */
1874         netdev->mtu = new_mtu;
1875         i40evf_reinit_locked(adapter);
1876         return 0;
1877 }
1878
1879 static const struct net_device_ops i40evf_netdev_ops = {
1880         .ndo_open               = i40evf_open,
1881         .ndo_stop               = i40evf_close,
1882         .ndo_start_xmit         = i40evf_xmit_frame,
1883         .ndo_get_stats          = i40evf_get_stats,
1884         .ndo_set_rx_mode        = i40evf_set_rx_mode,
1885         .ndo_validate_addr      = eth_validate_addr,
1886         .ndo_set_mac_address    = i40evf_set_mac,
1887         .ndo_change_mtu         = i40evf_change_mtu,
1888         .ndo_tx_timeout         = i40evf_tx_timeout,
1889         .ndo_vlan_rx_add_vid    = i40evf_vlan_rx_add_vid,
1890         .ndo_vlan_rx_kill_vid   = i40evf_vlan_rx_kill_vid,
1891 };
1892
1893 /**
1894  * i40evf_check_reset_complete - check that VF reset is complete
1895  * @hw: pointer to hw struct
1896  *
1897  * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
1898  **/
1899 static int i40evf_check_reset_complete(struct i40e_hw *hw)
1900 {
1901         u32 rstat;
1902         int i;
1903
1904         for (i = 0; i < 100; i++) {
1905                 rstat = rd32(hw, I40E_VFGEN_RSTAT);
1906                 if (rstat == I40E_VFR_VFACTIVE)
1907                         return 0;
1908                 udelay(10);
1909         }
1910         return -EBUSY;
1911 }
1912
1913 /**
1914  * i40evf_init_task - worker thread to perform delayed initialization
1915  * @work: pointer to work_struct containing our data
1916  *
1917  * This task completes the work that was begun in probe. Due to the nature
1918  * of VF-PF communications, we may need to wait tens of milliseconds to get
1919  * reponses back from the PF. Rather than busy-wait in probe and bog down the
1920  * whole system, we'll do it in a task so we can sleep.
1921  * This task only runs during driver init. Once we've established
1922  * communications with the PF driver and set up our netdev, the watchdog
1923  * takes over.
1924  **/
1925 static void i40evf_init_task(struct work_struct *work)
1926 {
1927         struct i40evf_adapter *adapter = container_of(work,
1928                                                       struct i40evf_adapter,
1929                                                       init_task.work);
1930         struct net_device *netdev = adapter->netdev;
1931         struct i40evf_mac_filter *f;
1932         struct i40e_hw *hw = &adapter->hw;
1933         struct pci_dev *pdev = adapter->pdev;
1934         int i, err, bufsz;
1935
1936         switch (adapter->state) {
1937         case __I40EVF_STARTUP:
1938                 /* driver loaded, probe complete */
1939                 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1940                 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1941                 err = i40e_set_mac_type(hw);
1942                 if (err) {
1943                         dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
1944                                 err);
1945                 goto err;
1946                 }
1947                 err = i40evf_check_reset_complete(hw);
1948                 if (err) {
1949                         dev_info(&pdev->dev, "Device is still in reset (%d), retrying\n",
1950                                 err);
1951                         goto err;
1952                 }
1953                 hw->aq.num_arq_entries = I40EVF_AQ_LEN;
1954                 hw->aq.num_asq_entries = I40EVF_AQ_LEN;
1955                 hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
1956                 hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
1957
1958                 err = i40evf_init_adminq(hw);
1959                 if (err) {
1960                         dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
1961                                 err);
1962                         goto err;
1963                 }
1964                 err = i40evf_send_api_ver(adapter);
1965                 if (err) {
1966                         dev_err(&pdev->dev, "Unable to send to PF (%d)\n", err);
1967                         i40evf_shutdown_adminq(hw);
1968                         goto err;
1969                 }
1970                 adapter->state = __I40EVF_INIT_VERSION_CHECK;
1971                 goto restart;
1972                 break;
1973         case __I40EVF_INIT_VERSION_CHECK:
1974                 if (!i40evf_asq_done(hw)) {
1975                         dev_err(&pdev->dev, "Admin queue command never completed\n");
1976                         goto err;
1977                 }
1978
1979                 /* aq msg sent, awaiting reply */
1980                 err = i40evf_verify_api_ver(adapter);
1981                 if (err) {
1982                         dev_info(&pdev->dev, "Unable to verify API version (%d), retrying\n",
1983                                 err);
1984                         goto err;
1985                 }
1986                 err = i40evf_send_vf_config_msg(adapter);
1987                 if (err) {
1988                         dev_err(&pdev->dev, "Unable send config request (%d)\n",
1989                                 err);
1990                         goto err;
1991                 }
1992                 adapter->state = __I40EVF_INIT_GET_RESOURCES;
1993                 goto restart;
1994                 break;
1995         case __I40EVF_INIT_GET_RESOURCES:
1996                 /* aq msg sent, awaiting reply */
1997                 if (!adapter->vf_res) {
1998                         bufsz = sizeof(struct i40e_virtchnl_vf_resource) +
1999                                 (I40E_MAX_VF_VSI *
2000                                  sizeof(struct i40e_virtchnl_vsi_resource));
2001                         adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
2002                         if (!adapter->vf_res)
2003                                 goto err;
2004                 }
2005                 err = i40evf_get_vf_config(adapter);
2006                 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
2007                         goto restart;
2008                 if (err) {
2009                         dev_err(&pdev->dev, "Unable to get VF config (%d)\n",
2010                                 err);
2011                         goto err_alloc;
2012                 }
2013                 adapter->state = __I40EVF_INIT_SW;
2014                 break;
2015         default:
2016                 goto err_alloc;
2017         }
2018         /* got VF config message back from PF, now we can parse it */
2019         for (i = 0; i < adapter->vf_res->num_vsis; i++) {
2020                 if (adapter->vf_res->vsi_res[i].vsi_type == I40E_VSI_SRIOV)
2021                         adapter->vsi_res = &adapter->vf_res->vsi_res[i];
2022         }
2023         if (!adapter->vsi_res) {
2024                 dev_err(&pdev->dev, "No LAN VSI found\n");
2025                 goto err_alloc;
2026         }
2027
2028         adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
2029
2030         netdev->netdev_ops = &i40evf_netdev_ops;
2031         i40evf_set_ethtool_ops(netdev);
2032         netdev->watchdog_timeo = 5 * HZ;
2033         netdev->features |= NETIF_F_HIGHDMA |
2034                             NETIF_F_SG |
2035                             NETIF_F_IP_CSUM |
2036                             NETIF_F_SCTP_CSUM |
2037                             NETIF_F_IPV6_CSUM |
2038                             NETIF_F_TSO |
2039                             NETIF_F_TSO6 |
2040                             NETIF_F_RXCSUM |
2041                             NETIF_F_GRO;
2042
2043         if (adapter->vf_res->vf_offload_flags
2044             & I40E_VIRTCHNL_VF_OFFLOAD_VLAN) {
2045                 netdev->vlan_features = netdev->features;
2046                 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX |
2047                                     NETIF_F_HW_VLAN_CTAG_RX |
2048                                     NETIF_F_HW_VLAN_CTAG_FILTER;
2049         }
2050
2051         /* copy netdev features into list of user selectable features */
2052         netdev->hw_features |= netdev->features;
2053         netdev->hw_features &= ~NETIF_F_RXCSUM;
2054
2055         if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
2056                 dev_info(&pdev->dev, "Invalid MAC address %pM, using random\n",
2057                          adapter->hw.mac.addr);
2058                 random_ether_addr(adapter->hw.mac.addr);
2059         }
2060         memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len);
2061         memcpy(netdev->perm_addr, adapter->hw.mac.addr, netdev->addr_len);
2062
2063         INIT_LIST_HEAD(&adapter->mac_filter_list);
2064         INIT_LIST_HEAD(&adapter->vlan_filter_list);
2065         f = kzalloc(sizeof(*f), GFP_ATOMIC);
2066         if (NULL == f)
2067                 goto err_sw_init;
2068
2069         memcpy(f->macaddr, adapter->hw.mac.addr, ETH_ALEN);
2070         f->add = true;
2071         adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
2072
2073         list_add(&f->list, &adapter->mac_filter_list);
2074
2075         init_timer(&adapter->watchdog_timer);
2076         adapter->watchdog_timer.function = &i40evf_watchdog_timer;
2077         adapter->watchdog_timer.data = (unsigned long)adapter;
2078         mod_timer(&adapter->watchdog_timer, jiffies + 1);
2079
2080         adapter->tx_desc_count = I40EVF_DEFAULT_TXD;
2081         adapter->rx_desc_count = I40EVF_DEFAULT_RXD;
2082         err = i40evf_init_interrupt_scheme(adapter);
2083         if (err)
2084                 goto err_sw_init;
2085         i40evf_map_rings_to_vectors(adapter);
2086         i40evf_configure_rss(adapter);
2087         err = i40evf_request_misc_irq(adapter);
2088         if (err)
2089                 goto err_sw_init;
2090
2091         netif_carrier_off(netdev);
2092
2093         adapter->vsi.id = adapter->vsi_res->vsi_id;
2094         adapter->vsi.seid = adapter->vsi_res->vsi_id; /* dummy */
2095         adapter->vsi.back = adapter;
2096         adapter->vsi.base_vector = 1;
2097         adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
2098         adapter->vsi.rx_itr_setting = (I40E_ITR_DYNAMIC |
2099                                        ITR_REG_TO_USEC(I40E_ITR_RX_DEF));
2100         adapter->vsi.tx_itr_setting = (I40E_ITR_DYNAMIC |
2101                                        ITR_REG_TO_USEC(I40E_ITR_TX_DEF));
2102         adapter->vsi.netdev = adapter->netdev;
2103
2104         if (!adapter->netdev_registered) {
2105                 err = register_netdev(netdev);
2106                 if (err)
2107                         goto err_register;
2108         }
2109
2110         adapter->netdev_registered = true;
2111
2112         netif_tx_stop_all_queues(netdev);
2113
2114         dev_info(&pdev->dev, "MAC address: %pM\n", adapter->hw.mac.addr);
2115         if (netdev->features & NETIF_F_GRO)
2116                 dev_info(&pdev->dev, "GRO is enabled\n");
2117
2118         dev_info(&pdev->dev, "%s\n", i40evf_driver_string);
2119         adapter->state = __I40EVF_DOWN;
2120         set_bit(__I40E_DOWN, &adapter->vsi.state);
2121         i40evf_misc_irq_enable(adapter);
2122         return;
2123 restart:
2124         schedule_delayed_work(&adapter->init_task,
2125                               msecs_to_jiffies(50));
2126         return;
2127
2128 err_register:
2129         i40evf_free_misc_irq(adapter);
2130 err_sw_init:
2131         i40evf_reset_interrupt_capability(adapter);
2132 err_alloc:
2133         kfree(adapter->vf_res);
2134         adapter->vf_res = NULL;
2135 err:
2136         /* Things went into the weeds, so try again later */
2137         if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
2138                 dev_err(&pdev->dev, "Failed to communicate with PF; giving up\n");
2139                 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
2140                 return; /* do not reschedule */
2141         }
2142         schedule_delayed_work(&adapter->init_task, HZ * 3);
2143 }
2144
2145 /**
2146  * i40evf_shutdown - Shutdown the device in preparation for a reboot
2147  * @pdev: pci device structure
2148  **/
2149 static void i40evf_shutdown(struct pci_dev *pdev)
2150 {
2151         struct net_device *netdev = pci_get_drvdata(pdev);
2152
2153         netif_device_detach(netdev);
2154
2155         if (netif_running(netdev))
2156                 i40evf_close(netdev);
2157
2158 #ifdef CONFIG_PM
2159         pci_save_state(pdev);
2160
2161 #endif
2162         pci_disable_device(pdev);
2163 }
2164
2165 /**
2166  * i40evf_probe - Device Initialization Routine
2167  * @pdev: PCI device information struct
2168  * @ent: entry in i40evf_pci_tbl
2169  *
2170  * Returns 0 on success, negative on failure
2171  *
2172  * i40evf_probe initializes an adapter identified by a pci_dev structure.
2173  * The OS initialization, configuring of the adapter private structure,
2174  * and a hardware reset occur.
2175  **/
2176 static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2177 {
2178         struct net_device *netdev;
2179         struct i40evf_adapter *adapter = NULL;
2180         struct i40e_hw *hw = NULL;
2181         int err;
2182
2183         err = pci_enable_device(pdev);
2184         if (err)
2185                 return err;
2186
2187         err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
2188         if (err) {
2189                 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2190                 if (err) {
2191                         dev_err(&pdev->dev,
2192                                 "DMA configuration failed: 0x%x\n", err);
2193                         goto err_dma;
2194                 }
2195         }
2196
2197         err = pci_request_regions(pdev, i40evf_driver_name);
2198         if (err) {
2199                 dev_err(&pdev->dev,
2200                         "pci_request_regions failed 0x%x\n", err);
2201                 goto err_pci_reg;
2202         }
2203
2204         pci_enable_pcie_error_reporting(pdev);
2205
2206         pci_set_master(pdev);
2207
2208         netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter),
2209                                    MAX_TX_QUEUES);
2210         if (!netdev) {
2211                 err = -ENOMEM;
2212                 goto err_alloc_etherdev;
2213         }
2214
2215         SET_NETDEV_DEV(netdev, &pdev->dev);
2216
2217         pci_set_drvdata(pdev, netdev);
2218         adapter = netdev_priv(netdev);
2219
2220         adapter->netdev = netdev;
2221         adapter->pdev = pdev;
2222
2223         hw = &adapter->hw;
2224         hw->back = adapter;
2225
2226         adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
2227         adapter->state = __I40EVF_STARTUP;
2228
2229         /* Call save state here because it relies on the adapter struct. */
2230         pci_save_state(pdev);
2231
2232         hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
2233                               pci_resource_len(pdev, 0));
2234         if (!hw->hw_addr) {
2235                 err = -EIO;
2236                 goto err_ioremap;
2237         }
2238         hw->vendor_id = pdev->vendor;
2239         hw->device_id = pdev->device;
2240         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2241         hw->subsystem_vendor_id = pdev->subsystem_vendor;
2242         hw->subsystem_device_id = pdev->subsystem_device;
2243         hw->bus.device = PCI_SLOT(pdev->devfn);
2244         hw->bus.func = PCI_FUNC(pdev->devfn);
2245
2246         INIT_WORK(&adapter->reset_task, i40evf_reset_task);
2247         INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
2248         INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
2249         INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
2250         schedule_delayed_work(&adapter->init_task, 10);
2251
2252         return 0;
2253
2254 err_ioremap:
2255         free_netdev(netdev);
2256 err_alloc_etherdev:
2257         pci_release_regions(pdev);
2258 err_pci_reg:
2259 err_dma:
2260         pci_disable_device(pdev);
2261         return err;
2262 }
2263
2264 #ifdef CONFIG_PM
2265 /**
2266  * i40evf_suspend - Power management suspend routine
2267  * @pdev: PCI device information struct
2268  * @state: unused
2269  *
2270  * Called when the system (VM) is entering sleep/suspend.
2271  **/
2272 static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
2273 {
2274         struct net_device *netdev = pci_get_drvdata(pdev);
2275         struct i40evf_adapter *adapter = netdev_priv(netdev);
2276         int retval = 0;
2277
2278         netif_device_detach(netdev);
2279
2280         if (netif_running(netdev)) {
2281                 rtnl_lock();
2282                 i40evf_down(adapter);
2283                 rtnl_unlock();
2284         }
2285         i40evf_free_misc_irq(adapter);
2286         i40evf_reset_interrupt_capability(adapter);
2287
2288         retval = pci_save_state(pdev);
2289         if (retval)
2290                 return retval;
2291
2292         pci_disable_device(pdev);
2293
2294         return 0;
2295 }
2296
2297 /**
2298  * i40evf_resume - Power managment resume routine
2299  * @pdev: PCI device information struct
2300  *
2301  * Called when the system (VM) is resumed from sleep/suspend.
2302  **/
2303 static int i40evf_resume(struct pci_dev *pdev)
2304 {
2305         struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
2306         struct net_device *netdev = adapter->netdev;
2307         u32 err;
2308
2309         pci_set_power_state(pdev, PCI_D0);
2310         pci_restore_state(pdev);
2311         /* pci_restore_state clears dev->state_saved so call
2312          * pci_save_state to restore it.
2313          */
2314         pci_save_state(pdev);
2315
2316         err = pci_enable_device_mem(pdev);
2317         if (err) {
2318                 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
2319                 return err;
2320         }
2321         pci_set_master(pdev);
2322
2323         rtnl_lock();
2324         err = i40evf_set_interrupt_capability(adapter);
2325         if (err) {
2326                 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
2327                 return err;
2328         }
2329         err = i40evf_request_misc_irq(adapter);
2330         rtnl_unlock();
2331         if (err) {
2332                 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
2333                 return err;
2334         }
2335
2336         schedule_work(&adapter->reset_task);
2337
2338         netif_device_attach(netdev);
2339
2340         return err;
2341 }
2342
2343 #endif /* CONFIG_PM */
2344 /**
2345  * i40evf_remove - Device Removal Routine
2346  * @pdev: PCI device information struct
2347  *
2348  * i40evf_remove is called by the PCI subsystem to alert the driver
2349  * that it should release a PCI device.  The could be caused by a
2350  * Hot-Plug event, or because the driver is going to be removed from
2351  * memory.
2352  **/
2353 static void i40evf_remove(struct pci_dev *pdev)
2354 {
2355         struct net_device *netdev = pci_get_drvdata(pdev);
2356         struct i40evf_adapter *adapter = netdev_priv(netdev);
2357         struct i40e_hw *hw = &adapter->hw;
2358
2359         cancel_delayed_work_sync(&adapter->init_task);
2360         cancel_work_sync(&adapter->reset_task);
2361
2362         if (adapter->netdev_registered) {
2363                 unregister_netdev(netdev);
2364                 adapter->netdev_registered = false;
2365         }
2366         adapter->state = __I40EVF_REMOVE;
2367
2368         if (adapter->msix_entries) {
2369                 i40evf_misc_irq_disable(adapter);
2370                 i40evf_free_misc_irq(adapter);
2371                 i40evf_reset_interrupt_capability(adapter);
2372         }
2373
2374         del_timer_sync(&adapter->watchdog_timer);
2375         flush_scheduled_work();
2376
2377         if (hw->aq.asq.count)
2378                 i40evf_shutdown_adminq(hw);
2379
2380         iounmap(hw->hw_addr);
2381         pci_release_regions(pdev);
2382
2383         i40evf_free_queues(adapter);
2384         kfree(adapter->vf_res);
2385
2386         free_netdev(netdev);
2387
2388         pci_disable_pcie_error_reporting(pdev);
2389
2390         pci_disable_device(pdev);
2391 }
2392
2393 static struct pci_driver i40evf_driver = {
2394         .name     = i40evf_driver_name,
2395         .id_table = i40evf_pci_tbl,
2396         .probe    = i40evf_probe,
2397         .remove   = i40evf_remove,
2398 #ifdef CONFIG_PM
2399         .suspend  = i40evf_suspend,
2400         .resume   = i40evf_resume,
2401 #endif
2402         .shutdown = i40evf_shutdown,
2403 };
2404
2405 /**
2406  * i40e_init_module - Driver Registration Routine
2407  *
2408  * i40e_init_module is the first routine called when the driver is
2409  * loaded. All it does is register with the PCI subsystem.
2410  **/
2411 static int __init i40evf_init_module(void)
2412 {
2413         int ret;
2414         pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
2415                i40evf_driver_version);
2416
2417         pr_info("%s\n", i40evf_copyright);
2418
2419         ret = pci_register_driver(&i40evf_driver);
2420         return ret;
2421 }
2422
2423 module_init(i40evf_init_module);
2424
2425 /**
2426  * i40e_exit_module - Driver Exit Cleanup Routine
2427  *
2428  * i40e_exit_module is called just before the driver is removed
2429  * from memory.
2430  **/
2431 static void __exit i40evf_exit_module(void)
2432 {
2433         pci_unregister_driver(&i40evf_driver);
2434 }
2435
2436 module_exit(i40evf_exit_module);
2437
2438 /* i40evf_main.c */