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 "0.9.36"
  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                 ether_addr_copy(f->macaddr, macaddr);
 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                 ether_addr_copy(hw->mac.addr, addr->sa_data);
 809                 ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
 810         }
 811
 812         return (f == NULL) ? -ENOMEM : 0;
 813 }
 814
 815 /**
 816  * i40evf_set_rx_mode - NDO callback to set the netdev filters
 817  * @netdev: network interface device structure
 818  **/
 819 static void i40evf_set_rx_mode(struct net_device *netdev)
 820 {
 821         struct i40evf_adapter *adapter = netdev_priv(netdev);
 822         struct i40evf_mac_filter *f, *ftmp;
 823         struct netdev_hw_addr *uca;
 824         struct netdev_hw_addr *mca;
 825
 826         /* add addr if not already in the filter list */
 827         netdev_for_each_uc_addr(uca, netdev) {
 828                 i40evf_add_filter(adapter, uca->addr);
 829         }
 830         netdev_for_each_mc_addr(mca, netdev) {
 831                 i40evf_add_filter(adapter, mca->addr);
 832         }
 833
 834         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 835                                 &adapter->crit_section))
 836                 mdelay(1);
 837         /* remove filter if not in netdev list */
 838         list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
 839                 bool found = false;
 840
 841                 if (is_multicast_ether_addr(f->macaddr)) {
 842                         netdev_for_each_mc_addr(mca, netdev) {
 843                                 if (ether_addr_equal(mca->addr, f->macaddr)) {
 844                                         found = true;
 845                                         break;
 846                                 }
 847                         }
 848                 } else {
 849                         netdev_for_each_uc_addr(uca, netdev) {
 850                                 if (ether_addr_equal(uca->addr, f->macaddr)) {
 851                                         found = true;
 852                                         break;
 853                                 }
 854                         }
 855                 }
 856                 if (found) {
 857                         f->remove = true;
 858                         adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
 859                 }
 860         }
 861         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 862 }
 863
 864 /**
 865  * i40evf_napi_enable_all - enable NAPI on all queue vectors
 866  * @adapter: board private structure
 867  **/
 868 static void i40evf_napi_enable_all(struct i40evf_adapter *adapter)
 869 {
 870         int q_idx;
 871         struct i40e_q_vector *q_vector;
 872         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 873
 874         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
 875                 struct napi_struct *napi;
 876                 q_vector = adapter->q_vector[q_idx];
 877                 napi = &q_vector->napi;
 878                 napi_enable(napi);
 879         }
 880 }
 881
 882 /**
 883  * i40evf_napi_disable_all - disable NAPI on all queue vectors
 884  * @adapter: board private structure
 885  **/
 886 static void i40evf_napi_disable_all(struct i40evf_adapter *adapter)
 887 {
 888         int q_idx;
 889         struct i40e_q_vector *q_vector;
 890         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 891
 892         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
 893                 q_vector = adapter->q_vector[q_idx];
 894                 napi_disable(&q_vector->napi);
 895         }
 896 }
 897
 898 /**
 899  * i40evf_configure - set up transmit and receive data structures
 900  * @adapter: board private structure
 901  **/
 902 static void i40evf_configure(struct i40evf_adapter *adapter)
 903 {
 904         struct net_device *netdev = adapter->netdev;
 905         int i;
 906
 907         i40evf_set_rx_mode(netdev);
 908
 909         i40evf_configure_tx(adapter);
 910         i40evf_configure_rx(adapter);
 911         adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
 912
 913         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
 914                 struct i40e_ring *ring = adapter->rx_rings[i];
 915                 i40evf_alloc_rx_buffers(ring, ring->count);
 916                 ring->next_to_use = ring->count - 1;
 917                 writel(ring->next_to_use, ring->tail);
 918         }
 919 }
 920
 921 /**
 922  * i40evf_up_complete - Finish the last steps of bringing up a connection
 923  * @adapter: board private structure
 924  **/
 925 static int i40evf_up_complete(struct i40evf_adapter *adapter)
 926 {
 927         adapter->state = __I40EVF_RUNNING;
 928         clear_bit(__I40E_DOWN, &adapter->vsi.state);
 929
 930         i40evf_napi_enable_all(adapter);
 931
 932         adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES;
 933         mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
 934         return 0;
 935 }
 936
 937 /**
 938  * i40evf_clean_all_rx_rings - Free Rx Buffers for all queues
 939  * @adapter: board private structure
 940  **/
 941 static void i40evf_clean_all_rx_rings(struct i40evf_adapter *adapter)
 942 {
 943         int i;
 944
 945         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
 946                 i40evf_clean_rx_ring(adapter->rx_rings[i]);
 947 }
 948
 949 /**
 950  * i40evf_clean_all_tx_rings - Free Tx Buffers for all queues
 951  * @adapter: board private structure
 952  **/
 953 static void i40evf_clean_all_tx_rings(struct i40evf_adapter *adapter)
 954 {
 955         int i;
 956
 957         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
 958                 i40evf_clean_tx_ring(adapter->tx_rings[i]);
 959 }
 960
 961 /**
 962  * i40e_down - Shutdown the connection processing
 963  * @adapter: board private structure
 964  **/
 965 void i40evf_down(struct i40evf_adapter *adapter)
 966 {
 967         struct net_device *netdev = adapter->netdev;
 968         struct i40evf_mac_filter *f;
 969
 970         if (adapter->state == __I40EVF_DOWN)
 971                 return;
 972
 973         /* remove all MAC filters */
 974         list_for_each_entry(f, &adapter->mac_filter_list, list) {
 975                 f->remove = true;
 976         }
 977         /* remove all VLAN filters */
 978         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
 979                 f->remove = true;
 980         }
 981         if (!(adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) &&
 982             adapter->state != __I40EVF_RESETTING) {
 983                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
 984                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
 985                 /* disable receives */
 986                 adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
 987                 mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
 988                 msleep(20);
 989         }
 990         netif_tx_disable(netdev);
 991
 992         netif_tx_stop_all_queues(netdev);
 993
 994         i40evf_irq_disable(adapter);
 995
 996         i40evf_napi_disable_all(adapter);
 997
 998         netif_carrier_off(netdev);
 999
1000         i40evf_clean_all_tx_rings(adapter);
1001         i40evf_clean_all_rx_rings(adapter);
1002 }
1003
1004 /**
1005  * i40evf_acquire_msix_vectors - Setup the MSIX capability
1006  * @adapter: board private structure
1007  * @vectors: number of vectors to request
1008  *
1009  * Work with the OS to set up the MSIX vectors needed.
1010  *
1011  * Returns 0 on success, negative on failure
1012  **/
1013 static int
1014 i40evf_acquire_msix_vectors(struct i40evf_adapter *adapter, int vectors)
1015 {
1016         int err, vector_threshold;
1017
1018         /* We'll want at least 3 (vector_threshold):
1019          * 0) Other (Admin Queue and link, mostly)
1020          * 1) TxQ[0] Cleanup
1021          * 2) RxQ[0] Cleanup
1022          */
1023         vector_threshold = MIN_MSIX_COUNT;
1024
1025         /* The more we get, the more we will assign to Tx/Rx Cleanup
1026          * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1027          * Right now, we simply care about how many we'll get; we'll
1028          * set them up later while requesting irq's.
1029          */
1030         err = pci_enable_msix_range(adapter->pdev, adapter->msix_entries,
1031                                     vector_threshold, vectors);
1032         if (err < 0) {
1033                 dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts\n");
1034                 kfree(adapter->msix_entries);
1035                 adapter->msix_entries = NULL;
1036                 return err;
1037         }
1038
1039         /* Adjust for only the vectors we'll use, which is minimum
1040          * of max_msix_q_vectors + NONQ_VECS, or the number of
1041          * vectors we were allocated.
1042          */
1043         adapter->num_msix_vectors = err;
1044         return 0;
1045 }
1046
1047 /**
1048  * i40evf_free_queues - Free memory for all rings
1049  * @adapter: board private structure to initialize
1050  *
1051  * Free all of the memory associated with queue pairs.
1052  **/
1053 static void i40evf_free_queues(struct i40evf_adapter *adapter)
1054 {
1055         int i;
1056
1057         if (!adapter->vsi_res)
1058                 return;
1059         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1060                 if (adapter->tx_rings[i])
1061                         kfree_rcu(adapter->tx_rings[i], rcu);
1062                 adapter->tx_rings[i] = NULL;
1063                 adapter->rx_rings[i] = NULL;
1064         }
1065 }
1066
1067 /**
1068  * i40evf_alloc_queues - Allocate memory for all rings
1069  * @adapter: board private structure to initialize
1070  *
1071  * We allocate one ring per queue at run-time since we don't know the
1072  * number of queues at compile-time.  The polling_netdev array is
1073  * intended for Multiqueue, but should work fine with a single queue.
1074  **/
1075 static int i40evf_alloc_queues(struct i40evf_adapter *adapter)
1076 {
1077         int i;
1078
1079         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1080                 struct i40e_ring *tx_ring;
1081                 struct i40e_ring *rx_ring;
1082
1083                 tx_ring = kzalloc(sizeof(struct i40e_ring) * 2, GFP_KERNEL);
1084                 if (!tx_ring)
1085                         goto err_out;
1086
1087                 tx_ring->queue_index = i;
1088                 tx_ring->netdev = adapter->netdev;
1089                 tx_ring->dev = &adapter->pdev->dev;
1090                 tx_ring->count = adapter->tx_desc_count;
1091                 adapter->tx_rings[i] = tx_ring;
1092
1093                 rx_ring = &tx_ring[1];
1094                 rx_ring->queue_index = i;
1095                 rx_ring->netdev = adapter->netdev;
1096                 rx_ring->dev = &adapter->pdev->dev;
1097                 rx_ring->count = adapter->rx_desc_count;
1098                 adapter->rx_rings[i] = rx_ring;
1099         }
1100
1101         return 0;
1102
1103 err_out:
1104         i40evf_free_queues(adapter);
1105         return -ENOMEM;
1106 }
1107
1108 /**
1109  * i40evf_set_interrupt_capability - set MSI-X or FAIL if not supported
1110  * @adapter: board private structure to initialize
1111  *
1112  * Attempt to configure the interrupts using the best available
1113  * capabilities of the hardware and the kernel.
1114  **/
1115 static int i40evf_set_interrupt_capability(struct i40evf_adapter *adapter)
1116 {
1117         int vector, v_budget;
1118         int pairs = 0;
1119         int err = 0;
1120
1121         if (!adapter->vsi_res) {
1122                 err = -EIO;
1123                 goto out;
1124         }
1125         pairs = adapter->vsi_res->num_queue_pairs;
1126
1127         /* It's easy to be greedy for MSI-X vectors, but it really
1128          * doesn't do us much good if we have a lot more vectors
1129          * than CPU's.  So let's be conservative and only ask for
1130          * (roughly) twice the number of vectors as there are CPU's.
1131          */
1132         v_budget = min_t(int, pairs, (int)(num_online_cpus() * 2)) + NONQ_VECS;
1133         v_budget = min_t(int, v_budget, (int)adapter->vf_res->max_vectors);
1134
1135         adapter->msix_entries = kcalloc(v_budget,
1136                                         sizeof(struct msix_entry), GFP_KERNEL);
1137         if (!adapter->msix_entries) {
1138                 err = -ENOMEM;
1139                 goto out;
1140         }
1141
1142         for (vector = 0; vector < v_budget; vector++)
1143                 adapter->msix_entries[vector].entry = vector;
1144
1145         i40evf_acquire_msix_vectors(adapter, v_budget);
1146
1147 out:
1148         adapter->netdev->real_num_tx_queues = pairs;
1149         return err;
1150 }
1151
1152 /**
1153  * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors
1154  * @adapter: board private structure to initialize
1155  *
1156  * We allocate one q_vector per queue interrupt.  If allocation fails we
1157  * return -ENOMEM.
1158  **/
1159 static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
1160 {
1161         int q_idx, num_q_vectors;
1162         struct i40e_q_vector *q_vector;
1163
1164         num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1165
1166         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1167                 q_vector = kzalloc(sizeof(struct i40e_q_vector), GFP_KERNEL);
1168                 if (!q_vector)
1169                         goto err_out;
1170                 q_vector->adapter = adapter;
1171                 q_vector->vsi = &adapter->vsi;
1172                 q_vector->v_idx = q_idx;
1173                 netif_napi_add(adapter->netdev, &q_vector->napi,
1174                                        i40evf_napi_poll, NAPI_POLL_WEIGHT);
1175                 adapter->q_vector[q_idx] = q_vector;
1176         }
1177
1178         return 0;
1179
1180 err_out:
1181         while (q_idx) {
1182                 q_idx--;
1183                 q_vector = adapter->q_vector[q_idx];
1184                 netif_napi_del(&q_vector->napi);
1185                 kfree(q_vector);
1186                 adapter->q_vector[q_idx] = NULL;
1187         }
1188         return -ENOMEM;
1189 }
1190
1191 /**
1192  * i40evf_free_q_vectors - Free memory allocated for interrupt vectors
1193  * @adapter: board private structure to initialize
1194  *
1195  * This function frees the memory allocated to the q_vectors.  In addition if
1196  * NAPI is enabled it will delete any references to the NAPI struct prior
1197  * to freeing the q_vector.
1198  **/
1199 static void i40evf_free_q_vectors(struct i40evf_adapter *adapter)
1200 {
1201         int q_idx, num_q_vectors;
1202         int napi_vectors;
1203
1204         num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1205         napi_vectors = adapter->vsi_res->num_queue_pairs;
1206
1207         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1208                 struct i40e_q_vector *q_vector = adapter->q_vector[q_idx];
1209
1210                 adapter->q_vector[q_idx] = NULL;
1211                 if (q_idx < napi_vectors)
1212                         netif_napi_del(&q_vector->napi);
1213                 kfree(q_vector);
1214         }
1215 }
1216
1217 /**
1218  * i40evf_reset_interrupt_capability - Reset MSIX setup
1219  * @adapter: board private structure
1220  *
1221  **/
1222 void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
1223 {
1224         pci_disable_msix(adapter->pdev);
1225         kfree(adapter->msix_entries);
1226         adapter->msix_entries = NULL;
1227 }
1228
1229 /**
1230  * i40evf_init_interrupt_scheme - Determine if MSIX is supported and init
1231  * @adapter: board private structure to initialize
1232  *
1233  **/
1234 int i40evf_init_interrupt_scheme(struct i40evf_adapter *adapter)
1235 {
1236         int err;
1237
1238         err = i40evf_set_interrupt_capability(adapter);
1239         if (err) {
1240                 dev_err(&adapter->pdev->dev,
1241                         "Unable to setup interrupt capabilities\n");
1242                 goto err_set_interrupt;
1243         }
1244
1245         err = i40evf_alloc_q_vectors(adapter);
1246         if (err) {
1247                 dev_err(&adapter->pdev->dev,
1248                         "Unable to allocate memory for queue vectors\n");
1249                 goto err_alloc_q_vectors;
1250         }
1251
1252         err = i40evf_alloc_queues(adapter);
1253         if (err) {
1254                 dev_err(&adapter->pdev->dev,
1255                         "Unable to allocate memory for queues\n");
1256                 goto err_alloc_queues;
1257         }
1258
1259         dev_info(&adapter->pdev->dev, "Multiqueue %s: Queue pair count = %u",
1260                 (adapter->vsi_res->num_queue_pairs > 1) ? "Enabled" :
1261                 "Disabled", adapter->vsi_res->num_queue_pairs);
1262
1263         return 0;
1264 err_alloc_queues:
1265         i40evf_free_q_vectors(adapter);
1266 err_alloc_q_vectors:
1267         i40evf_reset_interrupt_capability(adapter);
1268 err_set_interrupt:
1269         return err;
1270 }
1271
1272 /**
1273  * i40evf_watchdog_timer - Periodic call-back timer
1274  * @data: pointer to adapter disguised as unsigned long
1275  **/
1276 static void i40evf_watchdog_timer(unsigned long data)
1277 {
1278         struct i40evf_adapter *adapter = (struct i40evf_adapter *)data;
1279         schedule_work(&adapter->watchdog_task);
1280         /* timer will be rescheduled in watchdog task */
1281 }
1282
1283 /**
1284  * i40evf_watchdog_task - Periodic call-back task
1285  * @work: pointer to work_struct
1286  **/
1287 static void i40evf_watchdog_task(struct work_struct *work)
1288 {
1289         struct i40evf_adapter *adapter = container_of(work,
1290                                           struct i40evf_adapter,
1291                                           watchdog_task);
1292         struct i40e_hw *hw = &adapter->hw;
1293
1294         if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
1295                 goto restart_watchdog;
1296
1297         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1298                 if ((rd32(hw, I40E_VFGEN_RSTAT) & 0x3) == I40E_VFR_VFACTIVE) {
1299                         /* A chance for redemption! */
1300                         dev_err(&adapter->pdev->dev, "Hardware came out of reset. Attempting reinit.\n");
1301                         adapter->state = __I40EVF_STARTUP;
1302                         adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1303                         schedule_delayed_work(&adapter->init_task, 10);
1304                         clear_bit(__I40EVF_IN_CRITICAL_TASK,
1305                                   &adapter->crit_section);
1306                         /* Don't reschedule the watchdog, since we've restarted
1307                          * the init task. When init_task contacts the PF and
1308                          * gets everything set up again, it'll restart the
1309                          * watchdog for us. Down, boy. Sit. Stay. Woof.
1310                          */
1311                         return;
1312                 }
1313                 adapter->aq_pending = 0;
1314                 adapter->aq_required = 0;
1315                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1316                 goto watchdog_done;
1317         }
1318
1319         if ((adapter->state < __I40EVF_DOWN) ||
1320             (adapter->flags & I40EVF_FLAG_RESET_PENDING))
1321                 goto watchdog_done;
1322
1323         /* check for reset */
1324         if (!(adapter->flags & I40EVF_FLAG_RESET_PENDING) &&
1325             (rd32(hw, I40E_VFGEN_RSTAT) & 0x3) != I40E_VFR_VFACTIVE) {
1326                 adapter->state = __I40EVF_RESETTING;
1327                 adapter->flags |= I40EVF_FLAG_RESET_PENDING;
1328                 dev_err(&adapter->pdev->dev, "Hardware reset detected\n");
1329                 schedule_work(&adapter->reset_task);
1330                 adapter->aq_pending = 0;
1331                 adapter->aq_required = 0;
1332                 adapter->current_op = I40E_VIRTCHNL_OP_UNKNOWN;
1333                 goto watchdog_done;
1334         }
1335
1336         /* Process admin queue tasks. After init, everything gets done
1337          * here so we don't race on the admin queue.
1338          */
1339         if (adapter->aq_pending)
1340                 goto watchdog_done;
1341
1342         if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
1343                 i40evf_map_queues(adapter);
1344                 goto watchdog_done;
1345         }
1346
1347         if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
1348                 i40evf_add_ether_addrs(adapter);
1349                 goto watchdog_done;
1350         }
1351
1352         if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
1353                 i40evf_add_vlans(adapter);
1354                 goto watchdog_done;
1355         }
1356
1357         if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
1358                 i40evf_del_ether_addrs(adapter);
1359                 goto watchdog_done;
1360         }
1361
1362         if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
1363                 i40evf_del_vlans(adapter);
1364                 goto watchdog_done;
1365         }
1366
1367         if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
1368                 i40evf_disable_queues(adapter);
1369                 goto watchdog_done;
1370         }
1371
1372         if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
1373                 i40evf_configure_queues(adapter);
1374                 goto watchdog_done;
1375         }
1376
1377         if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
1378                 i40evf_enable_queues(adapter);
1379                 goto watchdog_done;
1380         }
1381
1382         if (adapter->state == __I40EVF_RUNNING)
1383                 i40evf_request_stats(adapter);
1384
1385         i40evf_irq_enable(adapter, true);
1386         i40evf_fire_sw_int(adapter, 0xFF);
1387
1388 watchdog_done:
1389         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1390 restart_watchdog:
1391         if (adapter->aq_required)
1392                 mod_timer(&adapter->watchdog_timer,
1393                           jiffies + msecs_to_jiffies(20));
1394         else
1395                 mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
1396         schedule_work(&adapter->adminq_task);
1397 }
1398
1399 /**
1400  * next_queue - increment to next available tx queue
1401  * @adapter: board private structure
1402  * @j: queue counter
1403  *
1404  * Helper function for RSS programming to increment through available
1405  * queus. Returns the next queue value.
1406  **/
1407 static int next_queue(struct i40evf_adapter *adapter, int j)
1408 {
1409         j += 1;
1410
1411         return j >= adapter->vsi_res->num_queue_pairs ? 0 : j;
1412 }
1413
1414 /**
1415  * i40evf_configure_rss - Prepare for RSS if used
1416  * @adapter: board private structure
1417  **/
1418 static void i40evf_configure_rss(struct i40evf_adapter *adapter)
1419 {
1420         struct i40e_hw *hw = &adapter->hw;
1421         u32 lut = 0;
1422         int i, j;
1423         u64 hena;
1424
1425         /* Set of random keys generated using kernel random number generator */
1426         static const u32 seed[I40E_VFQF_HKEY_MAX_INDEX + 1] = {
1427                         0x794221b4, 0xbca0c5ab, 0x6cd5ebd9, 0x1ada6127,
1428                         0x983b3aa1, 0x1c4e71eb, 0x7f6328b2, 0xfcdc0da0,
1429                         0xc135cafa, 0x7a6f7e2d, 0xe7102d28, 0x163cd12e,
1430                         0x4954b126 };
1431
1432         /* Hash type is configured by the PF - we just supply the key */
1433
1434         /* Fill out hash function seed */
1435         for (i = 0; i <= I40E_VFQF_HKEY_MAX_INDEX; i++)
1436                 wr32(hw, I40E_VFQF_HKEY(i), seed[i]);
1437
1438         /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
1439         hena = I40E_DEFAULT_RSS_HENA;
1440         wr32(hw, I40E_VFQF_HENA(0), (u32)hena);
1441         wr32(hw, I40E_VFQF_HENA(1), (u32)(hena >> 32));
1442
1443         /* Populate the LUT with max no. of queues in round robin fashion */
1444         j = adapter->vsi_res->num_queue_pairs;
1445         for (i = 0; i <= I40E_VFQF_HLUT_MAX_INDEX; i++) {
1446                 j = next_queue(adapter, j);
1447                 lut = j;
1448                 j = next_queue(adapter, j);
1449                 lut |= j << 8;
1450                 j = next_queue(adapter, j);
1451                 lut |= j << 16;
1452                 j = next_queue(adapter, j);
1453                 lut |= j << 24;
1454                 wr32(hw, I40E_VFQF_HLUT(i), lut);
1455         }
1456         i40e_flush(hw);
1457 }
1458
1459 #define I40EVF_RESET_WAIT_MS 100
1460 #define I40EVF_RESET_WAIT_COUNT 200
1461 /**
1462  * i40evf_reset_task - Call-back task to handle hardware reset
1463  * @work: pointer to work_struct
1464  *
1465  * During reset we need to shut down and reinitialize the admin queue
1466  * before we can use it to communicate with the PF again. We also clear
1467  * and reinit the rings because that context is lost as well.
1468  **/
1469 static void i40evf_reset_task(struct work_struct *work)
1470 {
1471         struct i40evf_adapter *adapter = container_of(work,
1472                                                       struct i40evf_adapter,
1473                                                       reset_task);
1474         struct i40e_hw *hw = &adapter->hw;
1475         int i = 0, err;
1476         uint32_t rstat_val;
1477
1478         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1479                                 &adapter->crit_section))
1480                 udelay(500);
1481
1482         if (adapter->flags & I40EVF_FLAG_RESET_NEEDED) {
1483                 dev_info(&adapter->pdev->dev, "Requesting reset from PF\n");
1484                 i40evf_request_reset(adapter);
1485         }
1486
1487         /* poll until we see the reset actually happen */
1488         for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1489                 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1490                             I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1491                 if (rstat_val != I40E_VFR_VFACTIVE)
1492                         break;
1493                 else
1494                         msleep(I40EVF_RESET_WAIT_MS);
1495         }
1496         if (i == I40EVF_RESET_WAIT_COUNT) {
1497                 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1498                 goto continue_reset; /* act like the reset happened */
1499         }
1500
1501         /* wait until the reset is complete and the PF is responding to us */
1502         for (i = 0; i < I40EVF_RESET_WAIT_COUNT; i++) {
1503                 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1504                             I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1505                 if (rstat_val == I40E_VFR_VFACTIVE)
1506                         break;
1507                 else
1508                         msleep(I40EVF_RESET_WAIT_MS);
1509         }
1510         if (i == I40EVF_RESET_WAIT_COUNT) {
1511                 /* reset never finished */
1512                 dev_err(&adapter->pdev->dev, "Reset never finished (%x)\n",
1513                         rstat_val);
1514                 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
1515
1516                 if (netif_running(adapter->netdev)) {
1517                         set_bit(__I40E_DOWN, &adapter->vsi.state);
1518                         i40evf_down(adapter);
1519                         i40evf_free_traffic_irqs(adapter);
1520                         i40evf_free_all_tx_resources(adapter);
1521                         i40evf_free_all_rx_resources(adapter);
1522                 }
1523                 i40evf_free_misc_irq(adapter);
1524                 i40evf_reset_interrupt_capability(adapter);
1525                 i40evf_free_queues(adapter);
1526                 kfree(adapter->vf_res);
1527                 i40evf_shutdown_adminq(hw);
1528                 adapter->netdev->flags &= ~IFF_UP;
1529                 clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1530                 return; /* Do not attempt to reinit. It's dead, Jim. */
1531         }
1532
1533 continue_reset:
1534         adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1535
1536         i40evf_down(adapter);
1537         adapter->state = __I40EVF_RESETTING;
1538
1539         /* kill and reinit the admin queue */
1540         if (i40evf_shutdown_adminq(hw))
1541                 dev_warn(&adapter->pdev->dev,
1542                         "%s: Failed to destroy the Admin Queue resources\n",
1543                         __func__);
1544         err = i40evf_init_adminq(hw);
1545         if (err)
1546                 dev_info(&adapter->pdev->dev, "%s: init_adminq failed: %d\n",
1547                         __func__, err);
1548
1549         adapter->aq_pending = 0;
1550         adapter->aq_required = 0;
1551         i40evf_map_queues(adapter);
1552         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1553
1554         mod_timer(&adapter->watchdog_timer, jiffies + 2);
1555
1556         if (netif_running(adapter->netdev)) {
1557                 /* allocate transmit descriptors */
1558                 err = i40evf_setup_all_tx_resources(adapter);
1559                 if (err)
1560                         goto reset_err;
1561
1562                 /* allocate receive descriptors */
1563                 err = i40evf_setup_all_rx_resources(adapter);
1564                 if (err)
1565                         goto reset_err;
1566
1567                 i40evf_configure(adapter);
1568
1569                 err = i40evf_up_complete(adapter);
1570                 if (err)
1571                         goto reset_err;
1572
1573                 i40evf_irq_enable(adapter, true);
1574         }
1575         return;
1576 reset_err:
1577         dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
1578         i40evf_close(adapter->netdev);
1579 }
1580
1581 /**
1582  * i40evf_adminq_task - worker thread to clean the admin queue
1583  * @work: pointer to work_struct containing our data
1584  **/
1585 static void i40evf_adminq_task(struct work_struct *work)
1586 {
1587         struct i40evf_adapter *adapter =
1588                 container_of(work, struct i40evf_adapter, adminq_task);
1589         struct i40e_hw *hw = &adapter->hw;
1590         struct i40e_arq_event_info event;
1591         struct i40e_virtchnl_msg *v_msg;
1592         i40e_status ret;
1593         u32 val, oldval;
1594         u16 pending;
1595
1596         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED)
1597                 return;
1598
1599         event.msg_size = I40EVF_MAX_AQ_BUF_SIZE;
1600         event.msg_buf = kzalloc(event.msg_size, GFP_KERNEL);
1601         if (!event.msg_buf)
1602                 return;
1603
1604         v_msg = (struct i40e_virtchnl_msg *)&event.desc;
1605         do {
1606                 ret = i40evf_clean_arq_element(hw, &event, &pending);
1607                 if (ret)
1608                         break; /* No event to process or error cleaning ARQ */
1609
1610                 i40evf_virtchnl_completion(adapter, v_msg->v_opcode,
1611                                            v_msg->v_retval, event.msg_buf,
1612                                            event.msg_size);
1613                 if (pending != 0) {
1614                         dev_info(&adapter->pdev->dev,
1615                                  "%s: ARQ: Pending events %d\n",
1616                                  __func__, pending);
1617                         memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
1618                 }
1619         } while (pending);
1620
1621         /* check for error indications */
1622         val = rd32(hw, hw->aq.arq.len);
1623         oldval = val;
1624         if (val & I40E_VF_ARQLEN_ARQVFE_MASK) {
1625                 dev_info(&adapter->pdev->dev, "ARQ VF Error detected\n");
1626                 val &= ~I40E_VF_ARQLEN_ARQVFE_MASK;
1627         }
1628         if (val & I40E_VF_ARQLEN_ARQOVFL_MASK) {
1629                 dev_info(&adapter->pdev->dev, "ARQ Overflow Error detected\n");
1630                 val &= ~I40E_VF_ARQLEN_ARQOVFL_MASK;
1631         }
1632         if (val & I40E_VF_ARQLEN_ARQCRIT_MASK) {
1633                 dev_info(&adapter->pdev->dev, "ARQ Critical Error detected\n");
1634                 val &= ~I40E_VF_ARQLEN_ARQCRIT_MASK;
1635         }
1636         if (oldval != val)
1637                 wr32(hw, hw->aq.arq.len, val);
1638
1639         val = rd32(hw, hw->aq.asq.len);
1640         oldval = val;
1641         if (val & I40E_VF_ATQLEN_ATQVFE_MASK) {
1642                 dev_info(&adapter->pdev->dev, "ASQ VF Error detected\n");
1643                 val &= ~I40E_VF_ATQLEN_ATQVFE_MASK;
1644         }
1645         if (val & I40E_VF_ATQLEN_ATQOVFL_MASK) {
1646                 dev_info(&adapter->pdev->dev, "ASQ Overflow Error detected\n");
1647                 val &= ~I40E_VF_ATQLEN_ATQOVFL_MASK;
1648         }
1649         if (val & I40E_VF_ATQLEN_ATQCRIT_MASK) {
1650                 dev_info(&adapter->pdev->dev, "ASQ Critical Error detected\n");
1651                 val &= ~I40E_VF_ATQLEN_ATQCRIT_MASK;
1652         }
1653         if (oldval != val)
1654                 wr32(hw, hw->aq.asq.len, val);
1655
1656         /* re-enable Admin queue interrupt cause */
1657         i40evf_misc_irq_enable(adapter);
1658
1659         kfree(event.msg_buf);
1660 }
1661
1662 /**
1663  * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
1664  * @adapter: board private structure
1665  *
1666  * Free all transmit software resources
1667  **/
1668 static void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
1669 {
1670         int i;
1671
1672         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
1673                 if (adapter->tx_rings[i]->desc)
1674                         i40evf_free_tx_resources(adapter->tx_rings[i]);
1675
1676 }
1677
1678 /**
1679  * i40evf_setup_all_tx_resources - allocate all queues Tx resources
1680  * @adapter: board private structure
1681  *
1682  * If this function returns with an error, then it's possible one or
1683  * more of the rings is populated (while the rest are not).  It is the
1684  * callers duty to clean those orphaned rings.
1685  *
1686  * Return 0 on success, negative on failure
1687  **/
1688 static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter)
1689 {
1690         int i, err = 0;
1691
1692         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1693                 adapter->tx_rings[i]->count = adapter->tx_desc_count;
1694                 err = i40evf_setup_tx_descriptors(adapter->tx_rings[i]);
1695                 if (!err)
1696                         continue;
1697                 dev_err(&adapter->pdev->dev,
1698                         "%s: Allocation for Tx Queue %u failed\n",
1699                         __func__, i);
1700                 break;
1701         }
1702
1703         return err;
1704 }
1705
1706 /**
1707  * i40evf_setup_all_rx_resources - allocate all queues Rx resources
1708  * @adapter: board private structure
1709  *
1710  * If this function returns with an error, then it's possible one or
1711  * more of the rings is populated (while the rest are not).  It is the
1712  * callers duty to clean those orphaned rings.
1713  *
1714  * Return 0 on success, negative on failure
1715  **/
1716 static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter)
1717 {
1718         int i, err = 0;
1719
1720         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1721                 adapter->rx_rings[i]->count = adapter->rx_desc_count;
1722                 err = i40evf_setup_rx_descriptors(adapter->rx_rings[i]);
1723                 if (!err)
1724                         continue;
1725                 dev_err(&adapter->pdev->dev,
1726                         "%s: Allocation for Rx Queue %u failed\n",
1727                         __func__, i);
1728                 break;
1729         }
1730         return err;
1731 }
1732
1733 /**
1734  * i40evf_free_all_rx_resources - Free Rx Resources for All Queues
1735  * @adapter: board private structure
1736  *
1737  * Free all receive software resources
1738  **/
1739 static void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
1740 {
1741         int i;
1742
1743         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
1744                 if (adapter->rx_rings[i]->desc)
1745                         i40evf_free_rx_resources(adapter->rx_rings[i]);
1746 }
1747
1748 /**
1749  * i40evf_open - Called when a network interface is made active
1750  * @netdev: network interface device structure
1751  *
1752  * Returns 0 on success, negative value on failure
1753  *
1754  * The open entry point is called when a network interface is made
1755  * active by the system (IFF_UP).  At this point all resources needed
1756  * for transmit and receive operations are allocated, the interrupt
1757  * handler is registered with the OS, the watchdog timer is started,
1758  * and the stack is notified that the interface is ready.
1759  **/
1760 static int i40evf_open(struct net_device *netdev)
1761 {
1762         struct i40evf_adapter *adapter = netdev_priv(netdev);
1763         int err;
1764
1765         if (adapter->flags & I40EVF_FLAG_PF_COMMS_FAILED) {
1766                 dev_err(&adapter->pdev->dev, "Unable to open device due to PF driver failure.\n");
1767                 return -EIO;
1768         }
1769         if (adapter->state != __I40EVF_DOWN)
1770                 return -EBUSY;
1771
1772         /* allocate transmit descriptors */
1773         err = i40evf_setup_all_tx_resources(adapter);
1774         if (err)
1775                 goto err_setup_tx;
1776
1777         /* allocate receive descriptors */
1778         err = i40evf_setup_all_rx_resources(adapter);
1779         if (err)
1780                 goto err_setup_rx;
1781
1782         /* clear any pending interrupts, may auto mask */
1783         err = i40evf_request_traffic_irqs(adapter, netdev->name);
1784         if (err)
1785                 goto err_req_irq;
1786
1787         i40evf_configure(adapter);
1788
1789         err = i40evf_up_complete(adapter);
1790         if (err)
1791                 goto err_req_irq;
1792
1793         i40evf_irq_enable(adapter, true);
1794
1795         return 0;
1796
1797 err_req_irq:
1798         i40evf_down(adapter);
1799         i40evf_free_traffic_irqs(adapter);
1800 err_setup_rx:
1801         i40evf_free_all_rx_resources(adapter);
1802 err_setup_tx:
1803         i40evf_free_all_tx_resources(adapter);
1804
1805         return err;
1806 }
1807
1808 /**
1809  * i40evf_close - Disables a network interface
1810  * @netdev: network interface device structure
1811  *
1812  * Returns 0, this is not allowed to fail
1813  *
1814  * The close entry point is called when an interface is de-activated
1815  * by the OS.  The hardware is still under the drivers control, but
1816  * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
1817  * are freed, along with all transmit and receive resources.
1818  **/
1819 static int i40evf_close(struct net_device *netdev)
1820 {
1821         struct i40evf_adapter *adapter = netdev_priv(netdev);
1822
1823         if (adapter->state <= __I40EVF_DOWN)
1824                 return 0;
1825
1826
1827         set_bit(__I40E_DOWN, &adapter->vsi.state);
1828
1829         i40evf_down(adapter);
1830         adapter->state = __I40EVF_DOWN;
1831         i40evf_free_traffic_irqs(adapter);
1832
1833         i40evf_free_all_tx_resources(adapter);
1834         i40evf_free_all_rx_resources(adapter);
1835
1836         return 0;
1837 }
1838
1839 /**
1840  * i40evf_get_stats - Get System Network Statistics
1841  * @netdev: network interface device structure
1842  *
1843  * Returns the address of the device statistics structure.
1844  * The statistics are actually updated from the timer callback.
1845  **/
1846 static struct net_device_stats *i40evf_get_stats(struct net_device *netdev)
1847 {
1848         struct i40evf_adapter *adapter = netdev_priv(netdev);
1849
1850         /* only return the current stats */
1851         return &adapter->net_stats;
1852 }
1853
1854 /**
1855  * i40evf_reinit_locked - Software reinit
1856  * @adapter: board private structure
1857  *
1858  * Reinititalizes the ring structures in response to a software configuration
1859  * change. Roughly the same as close followed by open, but skips releasing
1860  * and reallocating the interrupts.
1861  **/
1862 void i40evf_reinit_locked(struct i40evf_adapter *adapter)
1863 {
1864         struct net_device *netdev = adapter->netdev;
1865         int err;
1866
1867         WARN_ON(in_interrupt());
1868
1869         i40evf_down(adapter);
1870
1871         /* allocate transmit descriptors */
1872         err = i40evf_setup_all_tx_resources(adapter);
1873         if (err)
1874                 goto err_reinit;
1875
1876         /* allocate receive descriptors */
1877         err = i40evf_setup_all_rx_resources(adapter);
1878         if (err)
1879                 goto err_reinit;
1880
1881         i40evf_configure(adapter);
1882
1883         err = i40evf_up_complete(adapter);
1884         if (err)
1885                 goto err_reinit;
1886
1887         i40evf_irq_enable(adapter, true);
1888         return;
1889
1890 err_reinit:
1891         dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit\n");
1892         i40evf_close(netdev);
1893 }
1894
1895 /**
1896  * i40evf_change_mtu - Change the Maximum Transfer Unit
1897  * @netdev: network interface device structure
1898  * @new_mtu: new value for maximum frame size
1899  *
1900  * Returns 0 on success, negative on failure
1901  **/
1902 static int i40evf_change_mtu(struct net_device *netdev, int new_mtu)
1903 {
1904         struct i40evf_adapter *adapter = netdev_priv(netdev);
1905         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
1906
1907         if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
1908                 return -EINVAL;
1909
1910         /* must set new MTU before calling down or up */
1911         netdev->mtu = new_mtu;
1912         i40evf_reinit_locked(adapter);
1913         return 0;
1914 }
1915
1916 static const struct net_device_ops i40evf_netdev_ops = {
1917         .ndo_open               = i40evf_open,
1918         .ndo_stop               = i40evf_close,
1919         .ndo_start_xmit         = i40evf_xmit_frame,
1920         .ndo_get_stats          = i40evf_get_stats,
1921         .ndo_set_rx_mode        = i40evf_set_rx_mode,
1922         .ndo_validate_addr      = eth_validate_addr,
1923         .ndo_set_mac_address    = i40evf_set_mac,
1924         .ndo_change_mtu         = i40evf_change_mtu,
1925         .ndo_tx_timeout         = i40evf_tx_timeout,
1926         .ndo_vlan_rx_add_vid    = i40evf_vlan_rx_add_vid,
1927         .ndo_vlan_rx_kill_vid   = i40evf_vlan_rx_kill_vid,
1928 };
1929
1930 /**
1931  * i40evf_check_reset_complete - check that VF reset is complete
1932  * @hw: pointer to hw struct
1933  *
1934  * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
1935  **/
1936 static int i40evf_check_reset_complete(struct i40e_hw *hw)
1937 {
1938         u32 rstat;
1939         int i;
1940
1941         for (i = 0; i < 100; i++) {
1942                 rstat = rd32(hw, I40E_VFGEN_RSTAT);
1943                 if (rstat == I40E_VFR_VFACTIVE)
1944                         return 0;
1945                 udelay(10);
1946         }
1947         return -EBUSY;
1948 }
1949
1950 /**
1951  * i40evf_init_task - worker thread to perform delayed initialization
1952  * @work: pointer to work_struct containing our data
1953  *
1954  * This task completes the work that was begun in probe. Due to the nature
1955  * of VF-PF communications, we may need to wait tens of milliseconds to get
1956  * reponses back from the PF. Rather than busy-wait in probe and bog down the
1957  * whole system, we'll do it in a task so we can sleep.
1958  * This task only runs during driver init. Once we've established
1959  * communications with the PF driver and set up our netdev, the watchdog
1960  * takes over.
1961  **/
1962 static void i40evf_init_task(struct work_struct *work)
1963 {
1964         struct i40evf_adapter *adapter = container_of(work,
1965                                                       struct i40evf_adapter,
1966                                                       init_task.work);
1967         struct net_device *netdev = adapter->netdev;
1968         struct i40evf_mac_filter *f;
1969         struct i40e_hw *hw = &adapter->hw;
1970         struct pci_dev *pdev = adapter->pdev;
1971         int i, err, bufsz;
1972
1973         switch (adapter->state) {
1974         case __I40EVF_STARTUP:
1975                 /* driver loaded, probe complete */
1976                 adapter->flags &= ~I40EVF_FLAG_PF_COMMS_FAILED;
1977                 adapter->flags &= ~I40EVF_FLAG_RESET_PENDING;
1978                 err = i40e_set_mac_type(hw);
1979                 if (err) {
1980                         dev_err(&pdev->dev, "Failed to set MAC type (%d)\n",
1981                                 err);
1982                 goto err;
1983                 }
1984                 err = i40evf_check_reset_complete(hw);
1985                 if (err) {
1986                         dev_info(&pdev->dev, "Device is still in reset (%d), retrying\n",
1987                                 err);
1988                         goto err;
1989                 }
1990                 hw->aq.num_arq_entries = I40EVF_AQ_LEN;
1991                 hw->aq.num_asq_entries = I40EVF_AQ_LEN;
1992                 hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
1993                 hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
1994
1995                 err = i40evf_init_adminq(hw);
1996                 if (err) {
1997                         dev_err(&pdev->dev, "Failed to init Admin Queue (%d)\n",
1998                                 err);
1999                         goto err;
2000                 }
2001                 err = i40evf_send_api_ver(adapter);
2002                 if (err) {
2003                         dev_err(&pdev->dev, "Unable to send to PF (%d)\n", err);
2004                         i40evf_shutdown_adminq(hw);
2005                         goto err;
2006                 }
2007                 adapter->state = __I40EVF_INIT_VERSION_CHECK;
2008                 goto restart;
2009                 break;
2010         case __I40EVF_INIT_VERSION_CHECK:
2011                 if (!i40evf_asq_done(hw)) {
2012                         dev_err(&pdev->dev, "Admin queue command never completed\n");
2013                         goto err;
2014                 }
2015
2016                 /* aq msg sent, awaiting reply */
2017                 err = i40evf_verify_api_ver(adapter);
2018                 if (err) {
2019                         dev_info(&pdev->dev, "Unable to verify API version (%d), retrying\n",
2020                                 err);
2021                         goto err;
2022                 }
2023                 err = i40evf_send_vf_config_msg(adapter);
2024                 if (err) {
2025                         dev_err(&pdev->dev, "Unable send config request (%d)\n",
2026                                 err);
2027                         goto err;
2028                 }
2029                 adapter->state = __I40EVF_INIT_GET_RESOURCES;
2030                 goto restart;
2031                 break;
2032         case __I40EVF_INIT_GET_RESOURCES:
2033                 /* aq msg sent, awaiting reply */
2034                 if (!adapter->vf_res) {
2035                         bufsz = sizeof(struct i40e_virtchnl_vf_resource) +
2036                                 (I40E_MAX_VF_VSI *
2037                                  sizeof(struct i40e_virtchnl_vsi_resource));
2038                         adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
2039                         if (!adapter->vf_res)
2040                                 goto err;
2041                 }
2042                 err = i40evf_get_vf_config(adapter);
2043                 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
2044                         goto restart;
2045                 if (err) {
2046                         dev_err(&pdev->dev, "Unable to get VF config (%d)\n",
2047                                 err);
2048                         goto err_alloc;
2049                 }
2050                 adapter->state = __I40EVF_INIT_SW;
2051                 break;
2052         default:
2053                 goto err_alloc;
2054         }
2055         /* got VF config message back from PF, now we can parse it */
2056         for (i = 0; i < adapter->vf_res->num_vsis; i++) {
2057                 if (adapter->vf_res->vsi_res[i].vsi_type == I40E_VSI_SRIOV)
2058                         adapter->vsi_res = &adapter->vf_res->vsi_res[i];
2059         }
2060         if (!adapter->vsi_res) {
2061                 dev_err(&pdev->dev, "No LAN VSI found\n");
2062                 goto err_alloc;
2063         }
2064
2065         adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
2066
2067         netdev->netdev_ops = &i40evf_netdev_ops;
2068         i40evf_set_ethtool_ops(netdev);
2069         netdev->watchdog_timeo = 5 * HZ;
2070         netdev->features |= NETIF_F_HIGHDMA |
2071                             NETIF_F_SG |
2072                             NETIF_F_IP_CSUM |
2073                             NETIF_F_SCTP_CSUM |
2074                             NETIF_F_IPV6_CSUM |
2075                             NETIF_F_TSO |
2076                             NETIF_F_TSO6 |
2077                             NETIF_F_RXCSUM |
2078                             NETIF_F_GRO;
2079
2080         if (adapter->vf_res->vf_offload_flags
2081             & I40E_VIRTCHNL_VF_OFFLOAD_VLAN) {
2082                 netdev->vlan_features = netdev->features;
2083                 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX |
2084                                     NETIF_F_HW_VLAN_CTAG_RX |
2085                                     NETIF_F_HW_VLAN_CTAG_FILTER;
2086         }
2087
2088         /* copy netdev features into list of user selectable features */
2089         netdev->hw_features |= netdev->features;
2090         netdev->hw_features &= ~NETIF_F_RXCSUM;
2091
2092         if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
2093                 dev_info(&pdev->dev, "Invalid MAC address %pM, using random\n",
2094                          adapter->hw.mac.addr);
2095                 random_ether_addr(adapter->hw.mac.addr);
2096         }
2097         ether_addr_copy(netdev->dev_addr, adapter->hw.mac.addr);
2098         ether_addr_copy(netdev->perm_addr, adapter->hw.mac.addr);
2099
2100         INIT_LIST_HEAD(&adapter->mac_filter_list);
2101         INIT_LIST_HEAD(&adapter->vlan_filter_list);
2102         f = kzalloc(sizeof(*f), GFP_ATOMIC);
2103         if (NULL == f)
2104                 goto err_sw_init;
2105
2106         ether_addr_copy(f->macaddr, adapter->hw.mac.addr);
2107         f->add = true;
2108         adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
2109
2110         list_add(&f->list, &adapter->mac_filter_list);
2111
2112         init_timer(&adapter->watchdog_timer);
2113         adapter->watchdog_timer.function = &i40evf_watchdog_timer;
2114         adapter->watchdog_timer.data = (unsigned long)adapter;
2115         mod_timer(&adapter->watchdog_timer, jiffies + 1);
2116
2117         adapter->tx_desc_count = I40EVF_DEFAULT_TXD;
2118         adapter->rx_desc_count = I40EVF_DEFAULT_RXD;
2119         err = i40evf_init_interrupt_scheme(adapter);
2120         if (err)
2121                 goto err_sw_init;
2122         i40evf_map_rings_to_vectors(adapter);
2123         i40evf_configure_rss(adapter);
2124         err = i40evf_request_misc_irq(adapter);
2125         if (err)
2126                 goto err_sw_init;
2127
2128         netif_carrier_off(netdev);
2129
2130         adapter->vsi.id = adapter->vsi_res->vsi_id;
2131         adapter->vsi.seid = adapter->vsi_res->vsi_id; /* dummy */
2132         adapter->vsi.back = adapter;
2133         adapter->vsi.base_vector = 1;
2134         adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
2135         adapter->vsi.rx_itr_setting = (I40E_ITR_DYNAMIC |
2136                                        ITR_REG_TO_USEC(I40E_ITR_RX_DEF));
2137         adapter->vsi.tx_itr_setting = (I40E_ITR_DYNAMIC |
2138                                        ITR_REG_TO_USEC(I40E_ITR_TX_DEF));
2139         adapter->vsi.netdev = adapter->netdev;
2140
2141         if (!adapter->netdev_registered) {
2142                 err = register_netdev(netdev);
2143                 if (err)
2144                         goto err_register;
2145         }
2146
2147         adapter->netdev_registered = true;
2148
2149         netif_tx_stop_all_queues(netdev);
2150
2151         dev_info(&pdev->dev, "MAC address: %pM\n", adapter->hw.mac.addr);
2152         if (netdev->features & NETIF_F_GRO)
2153                 dev_info(&pdev->dev, "GRO is enabled\n");
2154
2155         dev_info(&pdev->dev, "%s\n", i40evf_driver_string);
2156         adapter->state = __I40EVF_DOWN;
2157         set_bit(__I40E_DOWN, &adapter->vsi.state);
2158         i40evf_misc_irq_enable(adapter);
2159         return;
2160 restart:
2161         schedule_delayed_work(&adapter->init_task,
2162                               msecs_to_jiffies(50));
2163         return;
2164
2165 err_register:
2166         i40evf_free_misc_irq(adapter);
2167 err_sw_init:
2168         i40evf_reset_interrupt_capability(adapter);
2169 err_alloc:
2170         kfree(adapter->vf_res);
2171         adapter->vf_res = NULL;
2172 err:
2173         /* Things went into the weeds, so try again later */
2174         if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
2175                 dev_err(&pdev->dev, "Failed to communicate with PF; giving up\n");
2176                 adapter->flags |= I40EVF_FLAG_PF_COMMS_FAILED;
2177                 return; /* do not reschedule */
2178         }
2179         schedule_delayed_work(&adapter->init_task, HZ * 3);
2180 }
2181
2182 /**
2183  * i40evf_shutdown - Shutdown the device in preparation for a reboot
2184  * @pdev: pci device structure
2185  **/
2186 static void i40evf_shutdown(struct pci_dev *pdev)
2187 {
2188         struct net_device *netdev = pci_get_drvdata(pdev);
2189
2190         netif_device_detach(netdev);
2191
2192         if (netif_running(netdev))
2193                 i40evf_close(netdev);
2194
2195 #ifdef CONFIG_PM
2196         pci_save_state(pdev);
2197
2198 #endif
2199         pci_disable_device(pdev);
2200 }
2201
2202 /**
2203  * i40evf_probe - Device Initialization Routine
2204  * @pdev: PCI device information struct
2205  * @ent: entry in i40evf_pci_tbl
2206  *
2207  * Returns 0 on success, negative on failure
2208  *
2209  * i40evf_probe initializes an adapter identified by a pci_dev structure.
2210  * The OS initialization, configuring of the adapter private structure,
2211  * and a hardware reset occur.
2212  **/
2213 static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2214 {
2215         struct net_device *netdev;
2216         struct i40evf_adapter *adapter = NULL;
2217         struct i40e_hw *hw = NULL;
2218         int err;
2219
2220         err = pci_enable_device(pdev);
2221         if (err)
2222                 return err;
2223
2224         err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(64));
2225         if (err) {
2226                 err = dma_set_mask_and_coherent(&pdev->dev, DMA_BIT_MASK(32));
2227                 if (err) {
2228                         dev_err(&pdev->dev,
2229                                 "DMA configuration failed: 0x%x\n", err);
2230                         goto err_dma;
2231                 }
2232         }
2233
2234         err = pci_request_regions(pdev, i40evf_driver_name);
2235         if (err) {
2236                 dev_err(&pdev->dev,
2237                         "pci_request_regions failed 0x%x\n", err);
2238                 goto err_pci_reg;
2239         }
2240
2241         pci_enable_pcie_error_reporting(pdev);
2242
2243         pci_set_master(pdev);
2244
2245         netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter),
2246                                    MAX_TX_QUEUES);
2247         if (!netdev) {
2248                 err = -ENOMEM;
2249                 goto err_alloc_etherdev;
2250         }
2251
2252         SET_NETDEV_DEV(netdev, &pdev->dev);
2253
2254         pci_set_drvdata(pdev, netdev);
2255         adapter = netdev_priv(netdev);
2256
2257         adapter->netdev = netdev;
2258         adapter->pdev = pdev;
2259
2260         hw = &adapter->hw;
2261         hw->back = adapter;
2262
2263         adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
2264         adapter->state = __I40EVF_STARTUP;
2265
2266         /* Call save state here because it relies on the adapter struct. */
2267         pci_save_state(pdev);
2268
2269         hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
2270                               pci_resource_len(pdev, 0));
2271         if (!hw->hw_addr) {
2272                 err = -EIO;
2273                 goto err_ioremap;
2274         }
2275         hw->vendor_id = pdev->vendor;
2276         hw->device_id = pdev->device;
2277         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2278         hw->subsystem_vendor_id = pdev->subsystem_vendor;
2279         hw->subsystem_device_id = pdev->subsystem_device;
2280         hw->bus.device = PCI_SLOT(pdev->devfn);
2281         hw->bus.func = PCI_FUNC(pdev->devfn);
2282
2283         INIT_WORK(&adapter->reset_task, i40evf_reset_task);
2284         INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
2285         INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
2286         INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
2287         schedule_delayed_work(&adapter->init_task, 10);
2288
2289         return 0;
2290
2291 err_ioremap:
2292         free_netdev(netdev);
2293 err_alloc_etherdev:
2294         pci_release_regions(pdev);
2295 err_pci_reg:
2296 err_dma:
2297         pci_disable_device(pdev);
2298         return err;
2299 }
2300
2301 #ifdef CONFIG_PM
2302 /**
2303  * i40evf_suspend - Power management suspend routine
2304  * @pdev: PCI device information struct
2305  * @state: unused
2306  *
2307  * Called when the system (VM) is entering sleep/suspend.
2308  **/
2309 static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
2310 {
2311         struct net_device *netdev = pci_get_drvdata(pdev);
2312         struct i40evf_adapter *adapter = netdev_priv(netdev);
2313         int retval = 0;
2314
2315         netif_device_detach(netdev);
2316
2317         if (netif_running(netdev)) {
2318                 rtnl_lock();
2319                 i40evf_down(adapter);
2320                 rtnl_unlock();
2321         }
2322         i40evf_free_misc_irq(adapter);
2323         i40evf_reset_interrupt_capability(adapter);
2324
2325         retval = pci_save_state(pdev);
2326         if (retval)
2327                 return retval;
2328
2329         pci_disable_device(pdev);
2330
2331         return 0;
2332 }
2333
2334 /**
2335  * i40evf_resume - Power managment resume routine
2336  * @pdev: PCI device information struct
2337  *
2338  * Called when the system (VM) is resumed from sleep/suspend.
2339  **/
2340 static int i40evf_resume(struct pci_dev *pdev)
2341 {
2342         struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
2343         struct net_device *netdev = adapter->netdev;
2344         u32 err;
2345
2346         pci_set_power_state(pdev, PCI_D0);
2347         pci_restore_state(pdev);
2348         /* pci_restore_state clears dev->state_saved so call
2349          * pci_save_state to restore it.
2350          */
2351         pci_save_state(pdev);
2352
2353         err = pci_enable_device_mem(pdev);
2354         if (err) {
2355                 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
2356                 return err;
2357         }
2358         pci_set_master(pdev);
2359
2360         rtnl_lock();
2361         err = i40evf_set_interrupt_capability(adapter);
2362         if (err) {
2363                 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
2364                 return err;
2365         }
2366         err = i40evf_request_misc_irq(adapter);
2367         rtnl_unlock();
2368         if (err) {
2369                 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
2370                 return err;
2371         }
2372
2373         schedule_work(&adapter->reset_task);
2374
2375         netif_device_attach(netdev);
2376
2377         return err;
2378 }
2379
2380 #endif /* CONFIG_PM */
2381 /**
2382  * i40evf_remove - Device Removal Routine
2383  * @pdev: PCI device information struct
2384  *
2385  * i40evf_remove is called by the PCI subsystem to alert the driver
2386  * that it should release a PCI device.  The could be caused by a
2387  * Hot-Plug event, or because the driver is going to be removed from
2388  * memory.
2389  **/
2390 static void i40evf_remove(struct pci_dev *pdev)
2391 {
2392         struct net_device *netdev = pci_get_drvdata(pdev);
2393         struct i40evf_adapter *adapter = netdev_priv(netdev);
2394         struct i40e_hw *hw = &adapter->hw;
2395
2396         cancel_delayed_work_sync(&adapter->init_task);
2397         cancel_work_sync(&adapter->reset_task);
2398
2399         if (adapter->netdev_registered) {
2400                 unregister_netdev(netdev);
2401                 adapter->netdev_registered = false;
2402         }
2403         adapter->state = __I40EVF_REMOVE;
2404
2405         if (adapter->msix_entries) {
2406                 i40evf_misc_irq_disable(adapter);
2407                 i40evf_free_misc_irq(adapter);
2408                 i40evf_reset_interrupt_capability(adapter);
2409         }
2410
2411         del_timer_sync(&adapter->watchdog_timer);
2412         flush_scheduled_work();
2413
2414         if (hw->aq.asq.count)
2415                 i40evf_shutdown_adminq(hw);
2416
2417         iounmap(hw->hw_addr);
2418         pci_release_regions(pdev);
2419
2420         i40evf_free_queues(adapter);
2421         kfree(adapter->vf_res);
2422
2423         free_netdev(netdev);
2424
2425         pci_disable_pcie_error_reporting(pdev);
2426
2427         pci_disable_device(pdev);
2428 }
2429
2430 static struct pci_driver i40evf_driver = {
2431         .name     = i40evf_driver_name,
2432         .id_table = i40evf_pci_tbl,
2433         .probe    = i40evf_probe,
2434         .remove   = i40evf_remove,
2435 #ifdef CONFIG_PM
2436         .suspend  = i40evf_suspend,
2437         .resume   = i40evf_resume,
2438 #endif
2439         .shutdown = i40evf_shutdown,
2440 };
2441
2442 /**
2443  * i40e_init_module - Driver Registration Routine
2444  *
2445  * i40e_init_module is the first routine called when the driver is
2446  * loaded. All it does is register with the PCI subsystem.
2447  **/
2448 static int __init i40evf_init_module(void)
2449 {
2450         int ret;
2451         pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
2452                i40evf_driver_version);
2453
2454         pr_info("%s\n", i40evf_copyright);
2455
2456         ret = pci_register_driver(&i40evf_driver);
2457         return ret;
2458 }
2459
2460 module_init(i40evf_init_module);
2461
2462 /**
2463  * i40e_exit_module - Driver Exit Cleanup Routine
2464  *
2465  * i40e_exit_module is called just before the driver is removed
2466  * from memory.
2467  **/
2468 static void __exit i40evf_exit_module(void)
2469 {
2470         pci_unregister_driver(&i40evf_driver);
2471 }
2472
2473 module_exit(i40evf_exit_module);
2474
2475 /* i40evf_main.c */