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

   1 /*******************************************************************************
   2  *
   3  * Intel Ethernet Controller XL710 Family Linux Virtual Function Driver
   4  * Copyright(c) 2013 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  * The full GNU General Public License is included in this distribution in
  16  * the file called "COPYING".
  17  *
  18  * Contact Information:
  19  * e1000-devel Mailing List <e1000-devel@lists.sourceforge.net>
  20  * Intel Corporation, 5200 N.E. Elam Young Parkway, Hillsboro, OR 97124-6497
  21  *
  22  ******************************************************************************/
  23
  24 #include "i40evf.h"
  25 #include "i40e_prototype.h"
  26 static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter);
  27 static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter);
  28 static int i40evf_close(struct net_device *netdev);
  29
  30 char i40evf_driver_name[] = "i40evf";
  31 static const char i40evf_driver_string[] =
  32         "Intel(R) XL710 X710 Virtual Function Network Driver";
  33
  34 #define DRV_VERSION "0.9.11"
  35 const char i40evf_driver_version[] = DRV_VERSION;
  36 static const char i40evf_copyright[] =
  37         "Copyright (c) 2013 Intel Corporation.";
  38
  39 /* i40evf_pci_tbl - PCI Device ID Table
  40  *
  41  * Wildcard entries (PCI_ANY_ID) should come last
  42  * Last entry must be all 0s
  43  *
  44  * { Vendor ID, Device ID, SubVendor ID, SubDevice ID,
  45  *   Class, Class Mask, private data (not used) }
  46  */
  47 static DEFINE_PCI_DEVICE_TABLE(i40evf_pci_tbl) = {
  48         {PCI_VDEVICE(INTEL, I40E_DEV_ID_VF), 0},
  49         /* required last entry */
  50         {0, }
  51 };
  52
  53 MODULE_DEVICE_TABLE(pci, i40evf_pci_tbl);
  54
  55 MODULE_AUTHOR("Intel Corporation, <linux.nics@intel.com>");
  56 MODULE_DESCRIPTION("Intel(R) XL710 X710 Virtual Function Network Driver");
  57 MODULE_LICENSE("GPL");
  58 MODULE_VERSION(DRV_VERSION);
  59
  60 /**
  61  * i40evf_allocate_dma_mem_d - OS specific memory alloc for shared code
  62  * @hw:   pointer to the HW structure
  63  * @mem:  ptr to mem struct to fill out
  64  * @size: size of memory requested
  65  * @alignment: what to align the allocation to
  66  **/
  67 i40e_status i40evf_allocate_dma_mem_d(struct i40e_hw *hw,
  68                                       struct i40e_dma_mem *mem,
  69                                       u64 size, u32 alignment)
  70 {
  71         struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
  72
  73         if (!mem)
  74                 return I40E_ERR_PARAM;
  75
  76         mem->size = ALIGN(size, alignment);
  77         mem->va = dma_alloc_coherent(&adapter->pdev->dev, mem->size,
  78                                      (dma_addr_t *)&mem->pa, GFP_KERNEL);
  79         if (mem->va)
  80                 return 0;
  81         else
  82                 return I40E_ERR_NO_MEMORY;
  83 }
  84
  85 /**
  86  * i40evf_free_dma_mem_d - OS specific memory free for shared code
  87  * @hw:   pointer to the HW structure
  88  * @mem:  ptr to mem struct to free
  89  **/
  90 i40e_status i40evf_free_dma_mem_d(struct i40e_hw *hw, struct i40e_dma_mem *mem)
  91 {
  92         struct i40evf_adapter *adapter = (struct i40evf_adapter *)hw->back;
  93
  94         if (!mem || !mem->va)
  95                 return I40E_ERR_PARAM;
  96         dma_free_coherent(&adapter->pdev->dev, mem->size,
  97                           mem->va, (dma_addr_t)mem->pa);
  98         return 0;
  99 }
 100
 101 /**
 102  * i40evf_allocate_virt_mem_d - OS specific memory alloc for shared code
 103  * @hw:   pointer to the HW structure
 104  * @mem:  ptr to mem struct to fill out
 105  * @size: size of memory requested
 106  **/
 107 i40e_status i40evf_allocate_virt_mem_d(struct i40e_hw *hw,
 108                                        struct i40e_virt_mem *mem, u32 size)
 109 {
 110         if (!mem)
 111                 return I40E_ERR_PARAM;
 112
 113         mem->size = size;
 114         mem->va = kzalloc(size, GFP_KERNEL);
 115
 116         if (mem->va)
 117                 return 0;
 118         else
 119                 return I40E_ERR_NO_MEMORY;
 120 }
 121
 122 /**
 123  * i40evf_free_virt_mem_d - OS specific memory free for shared code
 124  * @hw:   pointer to the HW structure
 125  * @mem:  ptr to mem struct to free
 126  **/
 127 i40e_status i40evf_free_virt_mem_d(struct i40e_hw *hw,
 128                                    struct i40e_virt_mem *mem)
 129 {
 130         if (!mem)
 131                 return I40E_ERR_PARAM;
 132
 133         /* it's ok to kfree a NULL pointer */
 134         kfree(mem->va);
 135
 136         return 0;
 137 }
 138
 139 /**
 140  * i40evf_debug_d - OS dependent version of debug printing
 141  * @hw:  pointer to the HW structure
 142  * @mask: debug level mask
 143  * @fmt_str: printf-type format description
 144  **/
 145 void i40evf_debug_d(void *hw, u32 mask, char *fmt_str, ...)
 146 {
 147         char buf[512];
 148         va_list argptr;
 149
 150         if (!(mask & ((struct i40e_hw *)hw)->debug_mask))
 151                 return;
 152
 153         va_start(argptr, fmt_str);
 154         vsnprintf(buf, sizeof(buf), fmt_str, argptr);
 155         va_end(argptr);
 156
 157         /* the debug string is already formatted with a newline */
 158         pr_info("%s", buf);
 159 }
 160
 161 /**
 162  * i40evf_tx_timeout - Respond to a Tx Hang
 163  * @netdev: network interface device structure
 164  **/
 165 static void i40evf_tx_timeout(struct net_device *netdev)
 166 {
 167         struct i40evf_adapter *adapter = netdev_priv(netdev);
 168
 169         adapter->tx_timeout_count++;
 170
 171         /* Do the reset outside of interrupt context */
 172         schedule_work(&adapter->reset_task);
 173 }
 174
 175 /**
 176  * i40evf_misc_irq_disable - Mask off interrupt generation on the NIC
 177  * @adapter: board private structure
 178  **/
 179 static void i40evf_misc_irq_disable(struct i40evf_adapter *adapter)
 180 {
 181         struct i40e_hw *hw = &adapter->hw;
 182         wr32(hw, I40E_VFINT_DYN_CTL01, 0);
 183
 184         /* read flush */
 185         rd32(hw, I40E_VFGEN_RSTAT);
 186
 187         synchronize_irq(adapter->msix_entries[0].vector);
 188 }
 189
 190 /**
 191  * i40evf_misc_irq_enable - Enable default interrupt generation settings
 192  * @adapter: board private structure
 193  **/
 194 static void i40evf_misc_irq_enable(struct i40evf_adapter *adapter)
 195 {
 196         struct i40e_hw *hw = &adapter->hw;
 197         wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK |
 198                                        I40E_VFINT_DYN_CTL01_ITR_INDX_MASK);
 199         wr32(hw, I40E_VFINT_ICR0_ENA1, I40E_VFINT_ICR0_ENA_ADMINQ_MASK);
 200
 201         /* read flush */
 202         rd32(hw, I40E_VFGEN_RSTAT);
 203 }
 204
 205 /**
 206  * i40evf_irq_disable - Mask off interrupt generation on the NIC
 207  * @adapter: board private structure
 208  **/
 209 static void i40evf_irq_disable(struct i40evf_adapter *adapter)
 210 {
 211         int i;
 212         struct i40e_hw *hw = &adapter->hw;
 213
 214         for (i = 1; i < adapter->num_msix_vectors; i++) {
 215                 wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), 0);
 216                 synchronize_irq(adapter->msix_entries[i].vector);
 217         }
 218         /* read flush */
 219         rd32(hw, I40E_VFGEN_RSTAT);
 220
 221 }
 222
 223 /**
 224  * i40evf_irq_enable_queues - Enable interrupt for specified queues
 225  * @adapter: board private structure
 226  * @mask: bitmap of queues to enable
 227  **/
 228 void i40evf_irq_enable_queues(struct i40evf_adapter *adapter, u32 mask)
 229 {
 230         struct i40e_hw *hw = &adapter->hw;
 231         int i;
 232
 233         for (i = 1; i < adapter->num_msix_vectors; i++) {
 234                 if (mask & (1 << (i - 1))) {
 235                         wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1),
 236                              I40E_VFINT_DYN_CTLN1_INTENA_MASK |
 237                              I40E_VFINT_DYN_CTLN_CLEARPBA_MASK);
 238                 }
 239         }
 240 }
 241
 242 /**
 243  * i40evf_fire_sw_int - Generate SW interrupt for specified vectors
 244  * @adapter: board private structure
 245  * @mask: bitmap of vectors to trigger
 246  **/
 247 static void i40evf_fire_sw_int(struct i40evf_adapter *adapter,
 248                                             u32 mask)
 249 {
 250         struct i40e_hw *hw = &adapter->hw;
 251         int i;
 252         uint32_t dyn_ctl;
 253
 254         for (i = 1; i < adapter->num_msix_vectors; i++) {
 255                 if (mask & (1 << i)) {
 256                         dyn_ctl = rd32(hw, I40E_VFINT_DYN_CTLN1(i - 1));
 257                         dyn_ctl |= I40E_VFINT_DYN_CTLN_SWINT_TRIG_MASK |
 258                                    I40E_VFINT_DYN_CTLN_CLEARPBA_MASK;
 259                         wr32(hw, I40E_VFINT_DYN_CTLN1(i - 1), dyn_ctl);
 260                 }
 261         }
 262 }
 263
 264 /**
 265  * i40evf_irq_enable - Enable default interrupt generation settings
 266  * @adapter: board private structure
 267  **/
 268 void i40evf_irq_enable(struct i40evf_adapter *adapter, bool flush)
 269 {
 270         struct i40e_hw *hw = &adapter->hw;
 271
 272         i40evf_irq_enable_queues(adapter, ~0);
 273
 274         if (flush)
 275                 rd32(hw, I40E_VFGEN_RSTAT);
 276 }
 277
 278 /**
 279  * i40evf_msix_aq - Interrupt handler for vector 0
 280  * @irq: interrupt number
 281  * @data: pointer to netdev
 282  **/
 283 static irqreturn_t i40evf_msix_aq(int irq, void *data)
 284 {
 285         struct net_device *netdev = data;
 286         struct i40evf_adapter *adapter = netdev_priv(netdev);
 287         struct i40e_hw *hw = &adapter->hw;
 288         u32 val;
 289         u32 ena_mask;
 290
 291         /* handle non-queue interrupts */
 292         val = rd32(hw, I40E_VFINT_ICR01);
 293         ena_mask = rd32(hw, I40E_VFINT_ICR0_ENA1);
 294
 295
 296         val = rd32(hw, I40E_VFINT_DYN_CTL01);
 297         val = val | I40E_PFINT_DYN_CTL0_CLEARPBA_MASK;
 298         wr32(hw, I40E_VFINT_DYN_CTL01, val);
 299
 300         /* re-enable interrupt causes */
 301         wr32(hw, I40E_VFINT_ICR0_ENA1, ena_mask);
 302         wr32(hw, I40E_VFINT_DYN_CTL01, I40E_VFINT_DYN_CTL01_INTENA_MASK);
 303
 304         /* schedule work on the private workqueue */
 305         schedule_work(&adapter->adminq_task);
 306
 307         return IRQ_HANDLED;
 308 }
 309
 310 /**
 311  * i40evf_msix_clean_rings - MSIX mode Interrupt Handler
 312  * @irq: interrupt number
 313  * @data: pointer to a q_vector
 314  **/
 315 static irqreturn_t i40evf_msix_clean_rings(int irq, void *data)
 316 {
 317         struct i40e_q_vector *q_vector = data;
 318
 319         if (!q_vector->tx.ring && !q_vector->rx.ring)
 320                 return IRQ_HANDLED;
 321
 322         napi_schedule(&q_vector->napi);
 323
 324         return IRQ_HANDLED;
 325 }
 326
 327 /**
 328  * i40evf_map_vector_to_rxq - associate irqs with rx queues
 329  * @adapter: board private structure
 330  * @v_idx: interrupt number
 331  * @r_idx: queue number
 332  **/
 333 static void
 334 i40evf_map_vector_to_rxq(struct i40evf_adapter *adapter, int v_idx, int r_idx)
 335 {
 336         struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
 337         struct i40e_ring *rx_ring = adapter->rx_rings[r_idx];
 338
 339         rx_ring->q_vector = q_vector;
 340         rx_ring->next = q_vector->rx.ring;
 341         rx_ring->vsi = &adapter->vsi;
 342         q_vector->rx.ring = rx_ring;
 343         q_vector->rx.count++;
 344         q_vector->rx.latency_range = I40E_LOW_LATENCY;
 345 }
 346
 347 /**
 348  * i40evf_map_vector_to_txq - associate irqs with tx queues
 349  * @adapter: board private structure
 350  * @v_idx: interrupt number
 351  * @t_idx: queue number
 352  **/
 353 static void
 354 i40evf_map_vector_to_txq(struct i40evf_adapter *adapter, int v_idx, int t_idx)
 355 {
 356         struct i40e_q_vector *q_vector = adapter->q_vector[v_idx];
 357         struct i40e_ring *tx_ring = adapter->tx_rings[t_idx];
 358
 359         tx_ring->q_vector = q_vector;
 360         tx_ring->next = q_vector->tx.ring;
 361         tx_ring->vsi = &adapter->vsi;
 362         q_vector->tx.ring = tx_ring;
 363         q_vector->tx.count++;
 364         q_vector->tx.latency_range = I40E_LOW_LATENCY;
 365         q_vector->num_ringpairs++;
 366         q_vector->ring_mask |= (1 << t_idx);
 367 }
 368
 369 /**
 370  * i40evf_map_rings_to_vectors - Maps descriptor rings to vectors
 371  * @adapter: board private structure to initialize
 372  *
 373  * This function maps descriptor rings to the queue-specific vectors
 374  * we were allotted through the MSI-X enabling code.  Ideally, we'd have
 375  * one vector per ring/queue, but on a constrained vector budget, we
 376  * group the rings as "efficiently" as possible.  You would add new
 377  * mapping configurations in here.
 378  **/
 379 static int i40evf_map_rings_to_vectors(struct i40evf_adapter *adapter)
 380 {
 381         int q_vectors;
 382         int v_start = 0;
 383         int rxr_idx = 0, txr_idx = 0;
 384         int rxr_remaining = adapter->vsi_res->num_queue_pairs;
 385         int txr_remaining = adapter->vsi_res->num_queue_pairs;
 386         int i, j;
 387         int rqpv, tqpv;
 388         int err = 0;
 389
 390         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 391
 392         /* The ideal configuration...
 393          * We have enough vectors to map one per queue.
 394          */
 395         if (q_vectors == (rxr_remaining * 2)) {
 396                 for (; rxr_idx < rxr_remaining; v_start++, rxr_idx++)
 397                         i40evf_map_vector_to_rxq(adapter, v_start, rxr_idx);
 398
 399                 for (; txr_idx < txr_remaining; v_start++, txr_idx++)
 400                         i40evf_map_vector_to_txq(adapter, v_start, txr_idx);
 401                 goto out;
 402         }
 403
 404         /* If we don't have enough vectors for a 1-to-1
 405          * mapping, we'll have to group them so there are
 406          * multiple queues per vector.
 407          * Re-adjusting *qpv takes care of the remainder.
 408          */
 409         for (i = v_start; i < q_vectors; i++) {
 410                 rqpv = DIV_ROUND_UP(rxr_remaining, q_vectors - i);
 411                 for (j = 0; j < rqpv; j++) {
 412                         i40evf_map_vector_to_rxq(adapter, i, rxr_idx);
 413                         rxr_idx++;
 414                         rxr_remaining--;
 415                 }
 416         }
 417         for (i = v_start; i < q_vectors; i++) {
 418                 tqpv = DIV_ROUND_UP(txr_remaining, q_vectors - i);
 419                 for (j = 0; j < tqpv; j++) {
 420                         i40evf_map_vector_to_txq(adapter, i, txr_idx);
 421                         txr_idx++;
 422                         txr_remaining--;
 423                 }
 424         }
 425
 426 out:
 427         adapter->aq_required |= I40EVF_FLAG_AQ_MAP_VECTORS;
 428
 429         return err;
 430 }
 431
 432 /**
 433  * i40evf_request_traffic_irqs - Initialize MSI-X interrupts
 434  * @adapter: board private structure
 435  *
 436  * Allocates MSI-X vectors for tx and rx handling, and requests
 437  * interrupts from the kernel.
 438  **/
 439 static int
 440 i40evf_request_traffic_irqs(struct i40evf_adapter *adapter, char *basename)
 441 {
 442         int vector, err, q_vectors;
 443         int rx_int_idx = 0, tx_int_idx = 0;
 444
 445         i40evf_irq_disable(adapter);
 446         /* Decrement for Other and TCP Timer vectors */
 447         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 448
 449         for (vector = 0; vector < q_vectors; vector++) {
 450                 struct i40e_q_vector *q_vector = adapter->q_vector[vector];
 451
 452                 if (q_vector->tx.ring && q_vector->rx.ring) {
 453                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 454                                  "i40evf-%s-%s-%d", basename,
 455                                  "TxRx", rx_int_idx++);
 456                         tx_int_idx++;
 457                 } else if (q_vector->rx.ring) {
 458                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 459                                  "i40evf-%s-%s-%d", basename,
 460                                  "rx", rx_int_idx++);
 461                 } else if (q_vector->tx.ring) {
 462                         snprintf(q_vector->name, sizeof(q_vector->name) - 1,
 463                                  "i40evf-%s-%s-%d", basename,
 464                                  "tx", tx_int_idx++);
 465                 } else {
 466                         /* skip this unused q_vector */
 467                         continue;
 468                 }
 469                 err = request_irq(
 470                         adapter->msix_entries[vector + NONQ_VECS].vector,
 471                         i40evf_msix_clean_rings,
 472                         0,
 473                         q_vector->name,
 474                         q_vector);
 475                 if (err) {
 476                         dev_info(&adapter->pdev->dev,
 477                                  "%s: request_irq failed, error: %d\n",
 478                                 __func__, err);
 479                         goto free_queue_irqs;
 480                 }
 481                 /* assign the mask for this irq */
 482                 irq_set_affinity_hint(
 483                         adapter->msix_entries[vector + NONQ_VECS].vector,
 484                         q_vector->affinity_mask);
 485         }
 486
 487         return 0;
 488
 489 free_queue_irqs:
 490         while (vector) {
 491                 vector--;
 492                 irq_set_affinity_hint(
 493                         adapter->msix_entries[vector + NONQ_VECS].vector,
 494                         NULL);
 495                 free_irq(adapter->msix_entries[vector + NONQ_VECS].vector,
 496                          adapter->q_vector[vector]);
 497         }
 498         return err;
 499 }
 500
 501 /**
 502  * i40evf_request_misc_irq - Initialize MSI-X interrupts
 503  * @adapter: board private structure
 504  *
 505  * Allocates MSI-X vector 0 and requests interrupts from the kernel. This
 506  * vector is only for the admin queue, and stays active even when the netdev
 507  * is closed.
 508  **/
 509 static int i40evf_request_misc_irq(struct i40evf_adapter *adapter)
 510 {
 511         struct net_device *netdev = adapter->netdev;
 512         int err;
 513
 514         sprintf(adapter->name[0], "i40evf:mbx");
 515         err = request_irq(adapter->msix_entries[0].vector,
 516                           &i40evf_msix_aq, 0, adapter->name[0], netdev);
 517         if (err) {
 518                 dev_err(&adapter->pdev->dev,
 519                         "request_irq for msix_aq failed: %d\n", err);
 520                 free_irq(adapter->msix_entries[0].vector, netdev);
 521         }
 522         return err;
 523 }
 524
 525 /**
 526  * i40evf_free_traffic_irqs - Free MSI-X interrupts
 527  * @adapter: board private structure
 528  *
 529  * Frees all MSI-X vectors other than 0.
 530  **/
 531 static void i40evf_free_traffic_irqs(struct i40evf_adapter *adapter)
 532 {
 533         int i;
 534         int q_vectors;
 535         q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 536
 537         for (i = 0; i < q_vectors; i++) {
 538                 irq_set_affinity_hint(adapter->msix_entries[i+1].vector,
 539                                       NULL);
 540                 free_irq(adapter->msix_entries[i+1].vector,
 541                          adapter->q_vector[i]);
 542         }
 543 }
 544
 545 /**
 546  * i40evf_free_misc_irq - Free MSI-X miscellaneous vector
 547  * @adapter: board private structure
 548  *
 549  * Frees MSI-X vector 0.
 550  **/
 551 static void i40evf_free_misc_irq(struct i40evf_adapter *adapter)
 552 {
 553         struct net_device *netdev = adapter->netdev;
 554
 555         free_irq(adapter->msix_entries[0].vector, netdev);
 556 }
 557
 558 /**
 559  * i40evf_configure_tx - Configure Transmit Unit after Reset
 560  * @adapter: board private structure
 561  *
 562  * Configure the Tx unit of the MAC after a reset.
 563  **/
 564 static void i40evf_configure_tx(struct i40evf_adapter *adapter)
 565 {
 566         struct i40e_hw *hw = &adapter->hw;
 567         int i;
 568         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
 569                 adapter->tx_rings[i]->tail = hw->hw_addr + I40E_QTX_TAIL1(i);
 570 }
 571
 572 /**
 573  * i40evf_configure_rx - Configure Receive Unit after Reset
 574  * @adapter: board private structure
 575  *
 576  * Configure the Rx unit of the MAC after a reset.
 577  **/
 578 static void i40evf_configure_rx(struct i40evf_adapter *adapter)
 579 {
 580         struct i40e_hw *hw = &adapter->hw;
 581         struct net_device *netdev = adapter->netdev;
 582         int max_frame = netdev->mtu + ETH_HLEN + ETH_FCS_LEN;
 583         int i;
 584         int rx_buf_len;
 585
 586
 587         adapter->flags &= ~I40EVF_FLAG_RX_PS_CAPABLE;
 588         adapter->flags |= I40EVF_FLAG_RX_1BUF_CAPABLE;
 589
 590         /* Decide whether to use packet split mode or not */
 591         if (netdev->mtu > ETH_DATA_LEN) {
 592                 if (adapter->flags & I40EVF_FLAG_RX_PS_CAPABLE)
 593                         adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
 594                 else
 595                         adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
 596         } else {
 597                 if (adapter->flags & I40EVF_FLAG_RX_1BUF_CAPABLE)
 598                         adapter->flags &= ~I40EVF_FLAG_RX_PS_ENABLED;
 599                 else
 600                         adapter->flags |= I40EVF_FLAG_RX_PS_ENABLED;
 601         }
 602
 603         /* Set the RX buffer length according to the mode */
 604         if (adapter->flags & I40EVF_FLAG_RX_PS_ENABLED) {
 605                 rx_buf_len = I40E_RX_HDR_SIZE;
 606         } else {
 607                 if (netdev->mtu <= ETH_DATA_LEN)
 608                         rx_buf_len = I40EVF_RXBUFFER_2048;
 609                 else
 610                         rx_buf_len = ALIGN(max_frame, 1024);
 611         }
 612
 613         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
 614                 adapter->rx_rings[i]->tail = hw->hw_addr + I40E_QRX_TAIL1(i);
 615                 adapter->rx_rings[i]->rx_buf_len = rx_buf_len;
 616         }
 617 }
 618
 619 /**
 620  * i40evf_find_vlan - Search filter list for specific vlan filter
 621  * @adapter: board private structure
 622  * @vlan: vlan tag
 623  *
 624  * Returns ptr to the filter object or NULL
 625  **/
 626 static struct
 627 i40evf_vlan_filter *i40evf_find_vlan(struct i40evf_adapter *adapter, u16 vlan)
 628 {
 629         struct i40evf_vlan_filter *f;
 630
 631         list_for_each_entry(f, &adapter->vlan_filter_list, list) {
 632                 if (vlan == f->vlan)
 633                         return f;
 634         }
 635         return NULL;
 636 }
 637
 638 /**
 639  * i40evf_add_vlan - Add a vlan filter to the list
 640  * @adapter: board private structure
 641  * @vlan: VLAN tag
 642  *
 643  * Returns ptr to the filter object or NULL when no memory available.
 644  **/
 645 static struct
 646 i40evf_vlan_filter *i40evf_add_vlan(struct i40evf_adapter *adapter, u16 vlan)
 647 {
 648         struct i40evf_vlan_filter *f;
 649
 650         f = i40evf_find_vlan(adapter, vlan);
 651         if (NULL == f) {
 652                 f = kzalloc(sizeof(*f), GFP_ATOMIC);
 653                 if (NULL == f) {
 654                         dev_info(&adapter->pdev->dev,
 655                                  "%s: no memory for new VLAN filter\n",
 656                                  __func__);
 657                         return NULL;
 658                 }
 659                 f->vlan = vlan;
 660
 661                 INIT_LIST_HEAD(&f->list);
 662                 list_add(&f->list, &adapter->vlan_filter_list);
 663                 f->add = true;
 664                 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_VLAN_FILTER;
 665         }
 666
 667         return f;
 668 }
 669
 670 /**
 671  * i40evf_del_vlan - Remove a vlan filter from the list
 672  * @adapter: board private structure
 673  * @vlan: VLAN tag
 674  **/
 675 static void i40evf_del_vlan(struct i40evf_adapter *adapter, u16 vlan)
 676 {
 677         struct i40evf_vlan_filter *f;
 678
 679         f = i40evf_find_vlan(adapter, vlan);
 680         if (f) {
 681                 f->remove = true;
 682                 adapter->aq_required |= I40EVF_FLAG_AQ_DEL_VLAN_FILTER;
 683         }
 684         return;
 685 }
 686
 687 /**
 688  * i40evf_vlan_rx_add_vid - Add a VLAN filter to a device
 689  * @netdev: network device struct
 690  * @vid: VLAN tag
 691  **/
 692 static int i40evf_vlan_rx_add_vid(struct net_device *netdev,
 693                          __always_unused __be16 proto, u16 vid)
 694 {
 695         struct i40evf_adapter *adapter = netdev_priv(netdev);
 696
 697         if (i40evf_add_vlan(adapter, vid) == NULL)
 698                 return -ENOMEM;
 699         return 0;
 700 }
 701
 702 /**
 703  * i40evf_vlan_rx_kill_vid - Remove a VLAN filter from a device
 704  * @netdev: network device struct
 705  * @vid: VLAN tag
 706  **/
 707 static int i40evf_vlan_rx_kill_vid(struct net_device *netdev,
 708                           __always_unused __be16 proto, u16 vid)
 709 {
 710         struct i40evf_adapter *adapter = netdev_priv(netdev);
 711
 712         i40evf_del_vlan(adapter, vid);
 713         return 0;
 714 }
 715
 716 /**
 717  * i40evf_find_filter - Search filter list for specific mac filter
 718  * @adapter: board private structure
 719  * @macaddr: the MAC address
 720  *
 721  * Returns ptr to the filter object or NULL
 722  **/
 723 static struct
 724 i40evf_mac_filter *i40evf_find_filter(struct i40evf_adapter *adapter,
 725                                       u8 *macaddr)
 726 {
 727         struct i40evf_mac_filter *f;
 728
 729         if (!macaddr)
 730                 return NULL;
 731
 732         list_for_each_entry(f, &adapter->mac_filter_list, list) {
 733                 if (ether_addr_equal(macaddr, f->macaddr))
 734                         return f;
 735         }
 736         return NULL;
 737 }
 738
 739 /**
 740  * i40e_add_filter - Add a mac filter to the filter list
 741  * @adapter: board private structure
 742  * @macaddr: the MAC address
 743  *
 744  * Returns ptr to the filter object or NULL when no memory available.
 745  **/
 746 static struct
 747 i40evf_mac_filter *i40evf_add_filter(struct i40evf_adapter *adapter,
 748                                      u8 *macaddr)
 749 {
 750         struct i40evf_mac_filter *f;
 751
 752         if (!macaddr)
 753                 return NULL;
 754
 755         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 756                                 &adapter->crit_section))
 757                 mdelay(1);
 758
 759         f = i40evf_find_filter(adapter, macaddr);
 760         if (NULL == f) {
 761                 f = kzalloc(sizeof(*f), GFP_ATOMIC);
 762                 if (NULL == f) {
 763                         dev_info(&adapter->pdev->dev,
 764                                  "%s: no memory for new filter\n", __func__);
 765                         clear_bit(__I40EVF_IN_CRITICAL_TASK,
 766                                   &adapter->crit_section);
 767                         return NULL;
 768                 }
 769
 770                 memcpy(f->macaddr, macaddr, ETH_ALEN);
 771
 772                 list_add(&f->list, &adapter->mac_filter_list);
 773                 f->add = true;
 774                 adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
 775         }
 776
 777         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 778         return f;
 779 }
 780
 781 /**
 782  * i40evf_set_mac - NDO callback to set port mac address
 783  * @netdev: network interface device structure
 784  * @p: pointer to an address structure
 785  *
 786  * Returns 0 on success, negative on failure
 787  **/
 788 static int i40evf_set_mac(struct net_device *netdev, void *p)
 789 {
 790         struct i40evf_adapter *adapter = netdev_priv(netdev);
 791         struct i40e_hw *hw = &adapter->hw;
 792         struct i40evf_mac_filter *f;
 793         struct sockaddr *addr = p;
 794
 795         if (!is_valid_ether_addr(addr->sa_data))
 796                 return -EADDRNOTAVAIL;
 797
 798         if (ether_addr_equal(netdev->dev_addr, addr->sa_data))
 799                 return 0;
 800
 801         f = i40evf_add_filter(adapter, addr->sa_data);
 802         if (f) {
 803                 memcpy(hw->mac.addr, addr->sa_data, netdev->addr_len);
 804                 memcpy(netdev->dev_addr, adapter->hw.mac.addr,
 805                        netdev->addr_len);
 806         }
 807
 808         return (f == NULL) ? -ENOMEM : 0;
 809 }
 810
 811 /**
 812  * i40evf_set_rx_mode - NDO callback to set the netdev filters
 813  * @netdev: network interface device structure
 814  **/
 815 static void i40evf_set_rx_mode(struct net_device *netdev)
 816 {
 817         struct i40evf_adapter *adapter = netdev_priv(netdev);
 818         struct i40evf_mac_filter *f, *ftmp;
 819         struct netdev_hw_addr *uca;
 820         struct netdev_hw_addr *mca;
 821
 822         /* add addr if not already in the filter list */
 823         netdev_for_each_uc_addr(uca, netdev) {
 824                 i40evf_add_filter(adapter, uca->addr);
 825         }
 826         netdev_for_each_mc_addr(mca, netdev) {
 827                 i40evf_add_filter(adapter, mca->addr);
 828         }
 829
 830         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
 831                                 &adapter->crit_section))
 832                 mdelay(1);
 833         /* remove filter if not in netdev list */
 834         list_for_each_entry_safe(f, ftmp, &adapter->mac_filter_list, list) {
 835                 bool found = false;
 836
 837                 if (f->macaddr[0] & 0x01) {
 838                         netdev_for_each_mc_addr(mca, netdev) {
 839                                 if (ether_addr_equal(mca->addr, f->macaddr)) {
 840                                         found = true;
 841                                         break;
 842                                 }
 843                         }
 844                 } else {
 845                         netdev_for_each_uc_addr(uca, netdev) {
 846                                 if (ether_addr_equal(uca->addr, f->macaddr)) {
 847                                         found = true;
 848                                         break;
 849                                 }
 850                         }
 851                 }
 852                 if (found) {
 853                         f->remove = true;
 854                         adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
 855                 }
 856         }
 857         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
 858 }
 859
 860 /**
 861  * i40evf_napi_enable_all - enable NAPI on all queue vectors
 862  * @adapter: board private structure
 863  **/
 864 static void i40evf_napi_enable_all(struct i40evf_adapter *adapter)
 865 {
 866         int q_idx;
 867         struct i40e_q_vector *q_vector;
 868         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 869
 870         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
 871                 struct napi_struct *napi;
 872                 q_vector = adapter->q_vector[q_idx];
 873                 napi = &q_vector->napi;
 874                 napi_enable(napi);
 875         }
 876 }
 877
 878 /**
 879  * i40evf_napi_disable_all - disable NAPI on all queue vectors
 880  * @adapter: board private structure
 881  **/
 882 static void i40evf_napi_disable_all(struct i40evf_adapter *adapter)
 883 {
 884         int q_idx;
 885         struct i40e_q_vector *q_vector;
 886         int q_vectors = adapter->num_msix_vectors - NONQ_VECS;
 887
 888         for (q_idx = 0; q_idx < q_vectors; q_idx++) {
 889                 q_vector = adapter->q_vector[q_idx];
 890                 napi_disable(&q_vector->napi);
 891         }
 892 }
 893
 894 /**
 895  * i40evf_configure - set up transmit and receive data structures
 896  * @adapter: board private structure
 897  **/
 898 static void i40evf_configure(struct i40evf_adapter *adapter)
 899 {
 900         struct net_device *netdev = adapter->netdev;
 901         int i;
 902
 903         i40evf_set_rx_mode(netdev);
 904
 905         i40evf_configure_tx(adapter);
 906         i40evf_configure_rx(adapter);
 907         adapter->aq_required |= I40EVF_FLAG_AQ_CONFIGURE_QUEUES;
 908
 909         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
 910                 struct i40e_ring *ring = adapter->rx_rings[i];
 911                 i40evf_alloc_rx_buffers(ring, ring->count);
 912                 ring->next_to_use = ring->count - 1;
 913                 writel(ring->next_to_use, ring->tail);
 914         }
 915 }
 916
 917 /**
 918  * i40evf_up_complete - Finish the last steps of bringing up a connection
 919  * @adapter: board private structure
 920  **/
 921 static int i40evf_up_complete(struct i40evf_adapter *adapter)
 922 {
 923         adapter->state = __I40EVF_RUNNING;
 924         clear_bit(__I40E_DOWN, &adapter->vsi.state);
 925
 926         i40evf_napi_enable_all(adapter);
 927
 928         adapter->aq_required |= I40EVF_FLAG_AQ_ENABLE_QUEUES;
 929         mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
 930         return 0;
 931 }
 932
 933 /**
 934  * i40evf_clean_all_rx_rings - Free Rx Buffers for all queues
 935  * @adapter: board private structure
 936  **/
 937 static void i40evf_clean_all_rx_rings(struct i40evf_adapter *adapter)
 938 {
 939         int i;
 940
 941         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
 942                 i40evf_clean_rx_ring(adapter->rx_rings[i]);
 943 }
 944
 945 /**
 946  * i40evf_clean_all_tx_rings - Free Tx Buffers for all queues
 947  * @adapter: board private structure
 948  **/
 949 static void i40evf_clean_all_tx_rings(struct i40evf_adapter *adapter)
 950 {
 951         int i;
 952
 953         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
 954                 i40evf_clean_tx_ring(adapter->tx_rings[i]);
 955 }
 956
 957 /**
 958  * i40e_down - Shutdown the connection processing
 959  * @adapter: board private structure
 960  **/
 961 void i40evf_down(struct i40evf_adapter *adapter)
 962 {
 963         struct net_device *netdev = adapter->netdev;
 964         struct i40evf_mac_filter *f;
 965
 966         /* remove all MAC filters from the VSI */
 967         list_for_each_entry(f, &adapter->mac_filter_list, list) {
 968                 f->remove = true;
 969         }
 970         adapter->aq_required |= I40EVF_FLAG_AQ_DEL_MAC_FILTER;
 971         /* disable receives */
 972         adapter->aq_required |= I40EVF_FLAG_AQ_DISABLE_QUEUES;
 973         mod_timer_pending(&adapter->watchdog_timer, jiffies + 1);
 974         msleep(20);
 975
 976         netif_tx_disable(netdev);
 977
 978         netif_tx_stop_all_queues(netdev);
 979
 980         i40evf_irq_disable(adapter);
 981
 982         i40evf_napi_disable_all(adapter);
 983
 984         netif_carrier_off(netdev);
 985
 986         i40evf_clean_all_tx_rings(adapter);
 987         i40evf_clean_all_rx_rings(adapter);
 988 }
 989
 990 /**
 991  * i40evf_acquire_msix_vectors - Setup the MSIX capability
 992  * @adapter: board private structure
 993  * @vectors: number of vectors to request
 994  *
 995  * Work with the OS to set up the MSIX vectors needed.
 996  *
 997  * Returns 0 on success, negative on failure
 998  **/
 999 static int
1000 i40evf_acquire_msix_vectors(struct i40evf_adapter *adapter, int vectors)
1001 {
1002         int err, vector_threshold;
1003
1004         /* We'll want at least 3 (vector_threshold):
1005          * 0) Other (Admin Queue and link, mostly)
1006          * 1) TxQ[0] Cleanup
1007          * 2) RxQ[0] Cleanup
1008          */
1009         vector_threshold = MIN_MSIX_COUNT;
1010
1011         /* The more we get, the more we will assign to Tx/Rx Cleanup
1012          * for the separate queues...where Rx Cleanup >= Tx Cleanup.
1013          * Right now, we simply care about how many we'll get; we'll
1014          * set them up later while requesting irq's.
1015          */
1016         while (vectors >= vector_threshold) {
1017                 err = pci_enable_msix(adapter->pdev, adapter->msix_entries,
1018                                       vectors);
1019                 if (!err) /* Success in acquiring all requested vectors. */
1020                         break;
1021                 else if (err < 0)
1022                         vectors = 0; /* Nasty failure, quit now */
1023                 else /* err == number of vectors we should try again with */
1024                         vectors = err;
1025         }
1026
1027         if (vectors < vector_threshold) {
1028                 dev_err(&adapter->pdev->dev, "Unable to allocate MSI-X interrupts.\n");
1029                 kfree(adapter->msix_entries);
1030                 adapter->msix_entries = NULL;
1031                 err = -EIO;
1032         } else {
1033                 /* Adjust for only the vectors we'll use, which is minimum
1034                  * of max_msix_q_vectors + NONQ_VECS, or the number of
1035                  * vectors we were allocated.
1036                  */
1037                 adapter->num_msix_vectors = vectors;
1038         }
1039         return err;
1040 }
1041
1042 /**
1043  * i40evf_free_queues - Free memory for all rings
1044  * @adapter: board private structure to initialize
1045  *
1046  * Free all of the memory associated with queue pairs.
1047  **/
1048 static void i40evf_free_queues(struct i40evf_adapter *adapter)
1049 {
1050         int i;
1051
1052         if (!adapter->vsi_res)
1053                 return;
1054         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1055                 if (adapter->tx_rings[i])
1056                         kfree_rcu(adapter->tx_rings[i], rcu);
1057                 adapter->tx_rings[i] = NULL;
1058                 adapter->rx_rings[i] = NULL;
1059         }
1060 }
1061
1062 /**
1063  * i40evf_alloc_queues - Allocate memory for all rings
1064  * @adapter: board private structure to initialize
1065  *
1066  * We allocate one ring per queue at run-time since we don't know the
1067  * number of queues at compile-time.  The polling_netdev array is
1068  * intended for Multiqueue, but should work fine with a single queue.
1069  **/
1070 static int i40evf_alloc_queues(struct i40evf_adapter *adapter)
1071 {
1072         int i;
1073
1074         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1075                 struct i40e_ring *tx_ring;
1076                 struct i40e_ring *rx_ring;
1077
1078                 tx_ring = kzalloc(sizeof(struct i40e_ring) * 2, GFP_KERNEL);
1079                 if (!tx_ring)
1080                         goto err_out;
1081
1082                 tx_ring->queue_index = i;
1083                 tx_ring->netdev = adapter->netdev;
1084                 tx_ring->dev = &adapter->pdev->dev;
1085                 tx_ring->count = I40EVF_DEFAULT_TXD;
1086                 adapter->tx_rings[i] = tx_ring;
1087
1088                 rx_ring = &tx_ring[1];
1089                 rx_ring->queue_index = i;
1090                 rx_ring->netdev = adapter->netdev;
1091                 rx_ring->dev = &adapter->pdev->dev;
1092                 rx_ring->count = I40EVF_DEFAULT_RXD;
1093                 adapter->rx_rings[i] = rx_ring;
1094         }
1095
1096         return 0;
1097
1098 err_out:
1099         i40evf_free_queues(adapter);
1100         return -ENOMEM;
1101 }
1102
1103 /**
1104  * i40evf_set_interrupt_capability - set MSI-X or FAIL if not supported
1105  * @adapter: board private structure to initialize
1106  *
1107  * Attempt to configure the interrupts using the best available
1108  * capabilities of the hardware and the kernel.
1109  **/
1110 static int i40evf_set_interrupt_capability(struct i40evf_adapter *adapter)
1111 {
1112         int vector, v_budget;
1113         int pairs = 0;
1114         int err = 0;
1115
1116         if (!adapter->vsi_res) {
1117                 err = -EIO;
1118                 goto out;
1119         }
1120         pairs = adapter->vsi_res->num_queue_pairs;
1121
1122         /* It's easy to be greedy for MSI-X vectors, but it really
1123          * doesn't do us much good if we have a lot more vectors
1124          * than CPU's.  So let's be conservative and only ask for
1125          * (roughly) twice the number of vectors as there are CPU's.
1126          */
1127         v_budget = min(pairs, (int)(num_online_cpus() * 2)) + NONQ_VECS;
1128         v_budget = min(v_budget, (int)adapter->vf_res->max_vectors + 1);
1129
1130         /* A failure in MSI-X entry allocation isn't fatal, but it does
1131          * mean we disable MSI-X capabilities of the adapter.
1132          */
1133         adapter->msix_entries = kcalloc(v_budget,
1134                                         sizeof(struct msix_entry), GFP_KERNEL);
1135         if (!adapter->msix_entries) {
1136                 err = -ENOMEM;
1137                 goto out;
1138         }
1139
1140         for (vector = 0; vector < v_budget; vector++)
1141                 adapter->msix_entries[vector].entry = vector;
1142
1143         i40evf_acquire_msix_vectors(adapter, v_budget);
1144
1145 out:
1146         adapter->netdev->real_num_tx_queues = pairs;
1147         return err;
1148 }
1149
1150 /**
1151  * i40evf_alloc_q_vectors - Allocate memory for interrupt vectors
1152  * @adapter: board private structure to initialize
1153  *
1154  * We allocate one q_vector per queue interrupt.  If allocation fails we
1155  * return -ENOMEM.
1156  **/
1157 static int i40evf_alloc_q_vectors(struct i40evf_adapter *adapter)
1158 {
1159         int q_idx, num_q_vectors;
1160         struct i40e_q_vector *q_vector;
1161
1162         num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1163
1164         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1165                 q_vector = kzalloc(sizeof(struct i40e_q_vector), GFP_KERNEL);
1166                 if (!q_vector)
1167                         goto err_out;
1168                 q_vector->adapter = adapter;
1169                 q_vector->vsi = &adapter->vsi;
1170                 q_vector->v_idx = q_idx;
1171                 netif_napi_add(adapter->netdev, &q_vector->napi,
1172                                        i40evf_napi_poll, 64);
1173                 adapter->q_vector[q_idx] = q_vector;
1174         }
1175
1176         return 0;
1177
1178 err_out:
1179         while (q_idx) {
1180                 q_idx--;
1181                 q_vector = adapter->q_vector[q_idx];
1182                 netif_napi_del(&q_vector->napi);
1183                 kfree(q_vector);
1184                 adapter->q_vector[q_idx] = NULL;
1185         }
1186         return -ENOMEM;
1187 }
1188
1189 /**
1190  * i40evf_free_q_vectors - Free memory allocated for interrupt vectors
1191  * @adapter: board private structure to initialize
1192  *
1193  * This function frees the memory allocated to the q_vectors.  In addition if
1194  * NAPI is enabled it will delete any references to the NAPI struct prior
1195  * to freeing the q_vector.
1196  **/
1197 static void i40evf_free_q_vectors(struct i40evf_adapter *adapter)
1198 {
1199         int q_idx, num_q_vectors;
1200         int napi_vectors;
1201
1202         num_q_vectors = adapter->num_msix_vectors - NONQ_VECS;
1203         napi_vectors = adapter->vsi_res->num_queue_pairs;
1204
1205         for (q_idx = 0; q_idx < num_q_vectors; q_idx++) {
1206                 struct i40e_q_vector *q_vector = adapter->q_vector[q_idx];
1207
1208                 adapter->q_vector[q_idx] = NULL;
1209                 if (q_idx < napi_vectors)
1210                         netif_napi_del(&q_vector->napi);
1211                 kfree(q_vector);
1212         }
1213 }
1214
1215 /**
1216  * i40evf_reset_interrupt_capability - Reset MSIX setup
1217  * @adapter: board private structure
1218  *
1219  **/
1220 void i40evf_reset_interrupt_capability(struct i40evf_adapter *adapter)
1221 {
1222         pci_disable_msix(adapter->pdev);
1223         kfree(adapter->msix_entries);
1224         adapter->msix_entries = NULL;
1225
1226         return;
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 (adapter->state < __I40EVF_DOWN)
1295                 goto watchdog_done;
1296
1297         if (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section))
1298                 goto watchdog_done;
1299
1300         /* check for unannounced reset */
1301         if ((adapter->state != __I40EVF_RESETTING) &&
1302             (rd32(hw, I40E_VFGEN_RSTAT) & 0x3) != I40E_VFR_VFACTIVE) {
1303                 adapter->state = __I40EVF_RESETTING;
1304                 schedule_work(&adapter->reset_task);
1305                 dev_info(&adapter->pdev->dev, "%s: hardware reset detected\n",
1306                          __func__);
1307                 goto watchdog_done;
1308         }
1309
1310         /* Process admin queue tasks. After init, everything gets done
1311          * here so we don't race on the admin queue.
1312          */
1313         if (adapter->aq_pending)
1314                 goto watchdog_done;
1315
1316         if (adapter->aq_required & I40EVF_FLAG_AQ_MAP_VECTORS) {
1317                 i40evf_map_queues(adapter);
1318                 goto watchdog_done;
1319         }
1320
1321         if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_MAC_FILTER) {
1322                 i40evf_add_ether_addrs(adapter);
1323                 goto watchdog_done;
1324         }
1325
1326         if (adapter->aq_required & I40EVF_FLAG_AQ_ADD_VLAN_FILTER) {
1327                 i40evf_add_vlans(adapter);
1328                 goto watchdog_done;
1329         }
1330
1331         if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_MAC_FILTER) {
1332                 i40evf_del_ether_addrs(adapter);
1333                 goto watchdog_done;
1334         }
1335
1336         if (adapter->aq_required & I40EVF_FLAG_AQ_DEL_VLAN_FILTER) {
1337                 i40evf_del_vlans(adapter);
1338                 goto watchdog_done;
1339         }
1340
1341         if (adapter->aq_required & I40EVF_FLAG_AQ_DISABLE_QUEUES) {
1342                 i40evf_disable_queues(adapter);
1343                 goto watchdog_done;
1344         }
1345
1346         if (adapter->aq_required & I40EVF_FLAG_AQ_CONFIGURE_QUEUES) {
1347                 i40evf_configure_queues(adapter);
1348                 goto watchdog_done;
1349         }
1350
1351         if (adapter->aq_required & I40EVF_FLAG_AQ_ENABLE_QUEUES) {
1352                 i40evf_enable_queues(adapter);
1353                 goto watchdog_done;
1354         }
1355
1356         if (adapter->state == __I40EVF_RUNNING)
1357                 i40evf_request_stats(adapter);
1358
1359         i40evf_irq_enable(adapter, true);
1360         i40evf_fire_sw_int(adapter, 0xFF);
1361 watchdog_done:
1362         if (adapter->aq_required)
1363                 mod_timer(&adapter->watchdog_timer,
1364                           jiffies + msecs_to_jiffies(20));
1365         else
1366                 mod_timer(&adapter->watchdog_timer, jiffies + (HZ * 2));
1367         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1368         schedule_work(&adapter->adminq_task);
1369 }
1370
1371 /**
1372  * i40evf_configure_rss - Prepare for RSS if used
1373  * @adapter: board private structure
1374  **/
1375 static void i40evf_configure_rss(struct i40evf_adapter *adapter)
1376 {
1377         struct i40e_hw *hw = &adapter->hw;
1378         u32 lut = 0;
1379         int i, j;
1380         u64 hena;
1381
1382         /* Set of random keys generated using kernel random number generator */
1383         static const u32 seed[I40E_VFQF_HKEY_MAX_INDEX + 1] = {
1384                         0x794221b4, 0xbca0c5ab, 0x6cd5ebd9, 0x1ada6127,
1385                         0x983b3aa1, 0x1c4e71eb, 0x7f6328b2, 0xfcdc0da0,
1386                         0xc135cafa, 0x7a6f7e2d, 0xe7102d28, 0x163cd12e,
1387                         0x4954b126 };
1388
1389         /* Hash type is configured by the PF - we just supply the key */
1390
1391         /* Fill out hash function seed */
1392         for (i = 0; i <= I40E_VFQF_HKEY_MAX_INDEX; i++)
1393                 wr32(hw, I40E_VFQF_HKEY(i), seed[i]);
1394
1395         /* Enable PCTYPES for RSS, TCP/UDP with IPv4/IPv6 */
1396         hena = I40E_DEFAULT_RSS_HENA;
1397         wr32(hw, I40E_VFQF_HENA(0), (u32)hena);
1398         wr32(hw, I40E_VFQF_HENA(1), (u32)(hena >> 32));
1399
1400         /* Populate the LUT with max no. of queues in round robin fashion */
1401         for (i = 0, j = 0; i < I40E_VFQF_HLUT_MAX_INDEX; i++, j++) {
1402                 if (j == adapter->vsi_res->num_queue_pairs)
1403                         j = 0;
1404                 /* lut = 4-byte sliding window of 4 lut entries */
1405                 lut = (lut << 8) | (j &
1406                          ((0x1 << 8) - 1));
1407                 /* On i = 3, we have 4 entries in lut; write to the register */
1408                 if ((i & 3) == 3)
1409                         wr32(hw, I40E_VFQF_HLUT(i >> 2), lut);
1410         }
1411         i40e_flush(hw);
1412 }
1413
1414 /**
1415  * i40evf_reset_task - Call-back task to handle hardware reset
1416  * @work: pointer to work_struct
1417  *
1418  * During reset we need to shut down and reinitialize the admin queue
1419  * before we can use it to communicate with the PF again. We also clear
1420  * and reinit the rings because that context is lost as well.
1421  **/
1422 static void i40evf_reset_task(struct work_struct *work)
1423 {
1424         struct i40evf_adapter *adapter =
1425                         container_of(work, struct i40evf_adapter, reset_task);
1426         struct i40e_hw *hw = &adapter->hw;
1427         int i = 0, err;
1428         uint32_t rstat_val;
1429
1430         while (test_and_set_bit(__I40EVF_IN_CRITICAL_TASK,
1431                                 &adapter->crit_section))
1432                 udelay(500);
1433
1434         /* wait until the reset is complete */
1435         for (i = 0; i < 20; i++) {
1436                 rstat_val = rd32(hw, I40E_VFGEN_RSTAT) &
1437                             I40E_VFGEN_RSTAT_VFR_STATE_MASK;
1438                 if (rstat_val == I40E_VFR_COMPLETED)
1439                         break;
1440                 else
1441                         mdelay(100);
1442         }
1443         if (i == 20) {
1444                 /* reset never finished */
1445                 dev_info(&adapter->pdev->dev, "%s: reset never finished: %x\n",
1446                         __func__, rstat_val);
1447                 /* carry on anyway */
1448         }
1449         i40evf_down(adapter);
1450         adapter->state = __I40EVF_RESETTING;
1451
1452         /* kill and reinit the admin queue */
1453         if (i40evf_shutdown_adminq(hw))
1454                 dev_warn(&adapter->pdev->dev,
1455                         "%s: Failed to destroy the Admin Queue resources\n",
1456                         __func__);
1457         err = i40evf_init_adminq(hw);
1458         if (err)
1459                 dev_info(&adapter->pdev->dev, "%s: init_adminq failed: %d\n",
1460                         __func__, err);
1461
1462         adapter->aq_pending = 0;
1463         adapter->aq_required = 0;
1464         i40evf_map_queues(adapter);
1465         clear_bit(__I40EVF_IN_CRITICAL_TASK, &adapter->crit_section);
1466
1467         mod_timer(&adapter->watchdog_timer, jiffies + 2);
1468
1469         if (netif_running(adapter->netdev)) {
1470                 /* allocate transmit descriptors */
1471                 err = i40evf_setup_all_tx_resources(adapter);
1472                 if (err)
1473                         goto reset_err;
1474
1475                 /* allocate receive descriptors */
1476                 err = i40evf_setup_all_rx_resources(adapter);
1477                 if (err)
1478                         goto reset_err;
1479
1480                 i40evf_configure(adapter);
1481
1482                 err = i40evf_up_complete(adapter);
1483                 if (err)
1484                         goto reset_err;
1485
1486                 i40evf_irq_enable(adapter, true);
1487         }
1488         return;
1489 reset_err:
1490         dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit.\n");
1491         i40evf_close(adapter->netdev);
1492 }
1493
1494 /**
1495  * i40evf_adminq_task - worker thread to clean the admin queue
1496  * @work: pointer to work_struct containing our data
1497  **/
1498 static void i40evf_adminq_task(struct work_struct *work)
1499 {
1500         struct i40evf_adapter *adapter =
1501                 container_of(work, struct i40evf_adapter, adminq_task);
1502         struct i40e_hw *hw = &adapter->hw;
1503         struct i40e_arq_event_info event;
1504         struct i40e_virtchnl_msg *v_msg;
1505         i40e_status ret;
1506         u16 pending;
1507
1508         event.msg_size = I40EVF_MAX_AQ_BUF_SIZE;
1509         event.msg_buf = kzalloc(event.msg_size, GFP_KERNEL);
1510         if (!event.msg_buf) {
1511                 dev_info(&adapter->pdev->dev, "%s: no memory for ARQ clean\n",
1512                                  __func__);
1513                 return;
1514         }
1515         v_msg = (struct i40e_virtchnl_msg *)&event.desc;
1516         do {
1517                 ret = i40evf_clean_arq_element(hw, &event, &pending);
1518                 if (ret)
1519                         break; /* No event to process or error cleaning ARQ */
1520
1521                 i40evf_virtchnl_completion(adapter, v_msg->v_opcode,
1522                                            v_msg->v_retval, event.msg_buf,
1523                                            event.msg_size);
1524                 if (pending != 0) {
1525                         dev_info(&adapter->pdev->dev,
1526                                  "%s: ARQ: Pending events %d\n",
1527                                  __func__, pending);
1528                         memset(event.msg_buf, 0, I40EVF_MAX_AQ_BUF_SIZE);
1529                 }
1530         } while (pending);
1531
1532         /* re-enable Admin queue interrupt cause */
1533         i40evf_misc_irq_enable(adapter);
1534
1535         kfree(event.msg_buf);
1536 }
1537
1538 /**
1539  * i40evf_free_all_tx_resources - Free Tx Resources for All Queues
1540  * @adapter: board private structure
1541  *
1542  * Free all transmit software resources
1543  **/
1544 static void i40evf_free_all_tx_resources(struct i40evf_adapter *adapter)
1545 {
1546         int i;
1547
1548         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
1549                 if (adapter->tx_rings[i]->desc)
1550                         i40evf_free_tx_resources(adapter->tx_rings[i]);
1551
1552 }
1553
1554 /**
1555  * i40evf_setup_all_tx_resources - allocate all queues Tx resources
1556  * @adapter: board private structure
1557  *
1558  * If this function returns with an error, then it's possible one or
1559  * more of the rings is populated (while the rest are not).  It is the
1560  * callers duty to clean those orphaned rings.
1561  *
1562  * Return 0 on success, negative on failure
1563  **/
1564 static int i40evf_setup_all_tx_resources(struct i40evf_adapter *adapter)
1565 {
1566         int i, err = 0;
1567
1568         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1569                 err = i40evf_setup_tx_descriptors(adapter->tx_rings[i]);
1570                 if (!err)
1571                         continue;
1572                 dev_err(&adapter->pdev->dev,
1573                         "%s: Allocation for Tx Queue %u failed\n",
1574                         __func__, i);
1575                 break;
1576         }
1577
1578         return err;
1579 }
1580
1581 /**
1582  * i40evf_setup_all_rx_resources - allocate all queues Rx resources
1583  * @adapter: board private structure
1584  *
1585  * If this function returns with an error, then it's possible one or
1586  * more of the rings is populated (while the rest are not).  It is the
1587  * callers duty to clean those orphaned rings.
1588  *
1589  * Return 0 on success, negative on failure
1590  **/
1591 static int i40evf_setup_all_rx_resources(struct i40evf_adapter *adapter)
1592 {
1593         int i, err = 0;
1594
1595         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++) {
1596                 err = i40evf_setup_rx_descriptors(adapter->rx_rings[i]);
1597                 if (!err)
1598                         continue;
1599                 dev_err(&adapter->pdev->dev,
1600                         "%s: Allocation for Rx Queue %u failed\n",
1601                         __func__, i);
1602                 break;
1603         }
1604         return err;
1605 }
1606
1607 /**
1608  * i40evf_free_all_rx_resources - Free Rx Resources for All Queues
1609  * @adapter: board private structure
1610  *
1611  * Free all receive software resources
1612  **/
1613 static void i40evf_free_all_rx_resources(struct i40evf_adapter *adapter)
1614 {
1615         int i;
1616
1617         for (i = 0; i < adapter->vsi_res->num_queue_pairs; i++)
1618                 if (adapter->rx_rings[i]->desc)
1619                         i40evf_free_rx_resources(adapter->rx_rings[i]);
1620 }
1621
1622 /**
1623  * i40evf_open - Called when a network interface is made active
1624  * @netdev: network interface device structure
1625  *
1626  * Returns 0 on success, negative value on failure
1627  *
1628  * The open entry point is called when a network interface is made
1629  * active by the system (IFF_UP).  At this point all resources needed
1630  * for transmit and receive operations are allocated, the interrupt
1631  * handler is registered with the OS, the watchdog timer is started,
1632  * and the stack is notified that the interface is ready.
1633  **/
1634 static int i40evf_open(struct net_device *netdev)
1635 {
1636         struct i40evf_adapter *adapter = netdev_priv(netdev);
1637         int err;
1638
1639         if (adapter->state != __I40EVF_DOWN)
1640                 return -EBUSY;
1641
1642         /* allocate transmit descriptors */
1643         err = i40evf_setup_all_tx_resources(adapter);
1644         if (err)
1645                 goto err_setup_tx;
1646
1647         /* allocate receive descriptors */
1648         err = i40evf_setup_all_rx_resources(adapter);
1649         if (err)
1650                 goto err_setup_rx;
1651
1652         /* clear any pending interrupts, may auto mask */
1653         err = i40evf_request_traffic_irqs(adapter, netdev->name);
1654         if (err)
1655                 goto err_req_irq;
1656
1657         i40evf_configure(adapter);
1658
1659         err = i40evf_up_complete(adapter);
1660         if (err)
1661                 goto err_req_irq;
1662
1663         i40evf_irq_enable(adapter, true);
1664
1665         return 0;
1666
1667 err_req_irq:
1668         i40evf_down(adapter);
1669         i40evf_free_traffic_irqs(adapter);
1670 err_setup_rx:
1671         i40evf_free_all_rx_resources(adapter);
1672 err_setup_tx:
1673         i40evf_free_all_tx_resources(adapter);
1674
1675         return err;
1676 }
1677
1678 /**
1679  * i40evf_close - Disables a network interface
1680  * @netdev: network interface device structure
1681  *
1682  * Returns 0, this is not allowed to fail
1683  *
1684  * The close entry point is called when an interface is de-activated
1685  * by the OS.  The hardware is still under the drivers control, but
1686  * needs to be disabled. All IRQs except vector 0 (reserved for admin queue)
1687  * are freed, along with all transmit and receive resources.
1688  **/
1689 static int i40evf_close(struct net_device *netdev)
1690 {
1691         struct i40evf_adapter *adapter = netdev_priv(netdev);
1692
1693         /* signal that we are down to the interrupt handler */
1694         adapter->state = __I40EVF_DOWN;
1695         set_bit(__I40E_DOWN, &adapter->vsi.state);
1696
1697         i40evf_down(adapter);
1698         i40evf_free_traffic_irqs(adapter);
1699
1700         i40evf_free_all_tx_resources(adapter);
1701         i40evf_free_all_rx_resources(adapter);
1702
1703         return 0;
1704 }
1705
1706 /**
1707  * i40evf_get_stats - Get System Network Statistics
1708  * @netdev: network interface device structure
1709  *
1710  * Returns the address of the device statistics structure.
1711  * The statistics are actually updated from the timer callback.
1712  **/
1713 static struct net_device_stats *i40evf_get_stats(struct net_device *netdev)
1714 {
1715         struct i40evf_adapter *adapter = netdev_priv(netdev);
1716
1717         /* only return the current stats */
1718         return &adapter->net_stats;
1719 }
1720
1721 /**
1722  * i40evf_reinit_locked - Software reinit
1723  * @adapter: board private structure
1724  *
1725  * Reinititalizes the ring structures in response to a software configuration
1726  * change. Roughly the same as close followed by open, but skips releasing
1727  * and reallocating the interrupts.
1728  **/
1729 void i40evf_reinit_locked(struct i40evf_adapter *adapter)
1730 {
1731         struct net_device *netdev = adapter->netdev;
1732         int err;
1733
1734         WARN_ON(in_interrupt());
1735
1736         adapter->state = __I40EVF_RESETTING;
1737
1738         i40evf_down(adapter);
1739
1740         /* allocate transmit descriptors */
1741         err = i40evf_setup_all_tx_resources(adapter);
1742         if (err)
1743                 goto err_reinit;
1744
1745         /* allocate receive descriptors */
1746         err = i40evf_setup_all_rx_resources(adapter);
1747         if (err)
1748                 goto err_reinit;
1749
1750         i40evf_configure(adapter);
1751
1752         err = i40evf_up_complete(adapter);
1753         if (err)
1754                 goto err_reinit;
1755
1756         i40evf_irq_enable(adapter, true);
1757         return;
1758
1759 err_reinit:
1760         dev_err(&adapter->pdev->dev, "failed to allocate resources during reinit.\n");
1761         i40evf_close(netdev);
1762 }
1763
1764 /**
1765  * i40evf_change_mtu - Change the Maximum Transfer Unit
1766  * @netdev: network interface device structure
1767  * @new_mtu: new value for maximum frame size
1768  *
1769  * Returns 0 on success, negative on failure
1770  **/
1771 static int i40evf_change_mtu(struct net_device *netdev, int new_mtu)
1772 {
1773         struct i40evf_adapter *adapter = netdev_priv(netdev);
1774         int max_frame = new_mtu + ETH_HLEN + ETH_FCS_LEN;
1775
1776         if ((new_mtu < 68) || (max_frame > I40E_MAX_RXBUFFER))
1777                 return -EINVAL;
1778
1779         /* must set new MTU before calling down or up */
1780         netdev->mtu = new_mtu;
1781         i40evf_reinit_locked(adapter);
1782         return 0;
1783 }
1784
1785 static const struct net_device_ops i40evf_netdev_ops = {
1786         .ndo_open               = i40evf_open,
1787         .ndo_stop               = i40evf_close,
1788         .ndo_start_xmit         = i40evf_xmit_frame,
1789         .ndo_get_stats          = i40evf_get_stats,
1790         .ndo_set_rx_mode        = i40evf_set_rx_mode,
1791         .ndo_validate_addr      = eth_validate_addr,
1792         .ndo_set_mac_address    = i40evf_set_mac,
1793         .ndo_change_mtu         = i40evf_change_mtu,
1794         .ndo_tx_timeout         = i40evf_tx_timeout,
1795         .ndo_vlan_rx_add_vid    = i40evf_vlan_rx_add_vid,
1796         .ndo_vlan_rx_kill_vid   = i40evf_vlan_rx_kill_vid,
1797 };
1798
1799 /**
1800  * i40evf_check_reset_complete - check that VF reset is complete
1801  * @hw: pointer to hw struct
1802  *
1803  * Returns 0 if device is ready to use, or -EBUSY if it's in reset.
1804  **/
1805 static int i40evf_check_reset_complete(struct i40e_hw *hw)
1806 {
1807         u32 rstat;
1808         int i;
1809
1810         for (i = 0; i < 100; i++) {
1811                 rstat = rd32(hw, I40E_VFGEN_RSTAT);
1812                 if (rstat == I40E_VFR_VFACTIVE)
1813                         return 0;
1814                 udelay(10);
1815         }
1816         return -EBUSY;
1817 }
1818
1819 /**
1820  * i40evf_init_task - worker thread to perform delayed initialization
1821  * @work: pointer to work_struct containing our data
1822  *
1823  * This task completes the work that was begun in probe. Due to the nature
1824  * of VF-PF communications, we may need to wait tens of milliseconds to get
1825  * reponses back from the PF. Rather than busy-wait in probe and bog down the
1826  * whole system, we'll do it in a task so we can sleep.
1827  * This task only runs during driver init. Once we've established
1828  * communications with the PF driver and set up our netdev, the watchdog
1829  * takes over.
1830  **/
1831 static void i40evf_init_task(struct work_struct *work)
1832 {
1833         struct i40evf_adapter *adapter = container_of(work,
1834                                                       struct i40evf_adapter,
1835                                                       init_task.work);
1836         struct net_device *netdev = adapter->netdev;
1837         struct i40evf_mac_filter *f;
1838         struct i40e_hw *hw = &adapter->hw;
1839         struct pci_dev *pdev = adapter->pdev;
1840         int i, err, bufsz;
1841
1842         switch (adapter->state) {
1843         case __I40EVF_STARTUP:
1844                 /* driver loaded, probe complete */
1845                 err = i40e_set_mac_type(hw);
1846                 if (err) {
1847                         dev_info(&pdev->dev, "%s: set_mac_type failed: %d\n",
1848                                 __func__, err);
1849                 goto err;
1850                 }
1851                 err = i40evf_check_reset_complete(hw);
1852                 if (err) {
1853                         dev_info(&pdev->dev, "%s: device is still in reset (%d).\n",
1854                                 __func__, err);
1855                         goto err;
1856                 }
1857                 hw->aq.num_arq_entries = I40EVF_AQ_LEN;
1858                 hw->aq.num_asq_entries = I40EVF_AQ_LEN;
1859                 hw->aq.arq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
1860                 hw->aq.asq_buf_size = I40EVF_MAX_AQ_BUF_SIZE;
1861
1862                 err = i40evf_init_adminq(hw);
1863                 if (err) {
1864                         dev_info(&pdev->dev, "%s: init_adminq failed: %d\n",
1865                                 __func__, err);
1866                         goto err;
1867                 }
1868                 err = i40evf_send_api_ver(adapter);
1869                 if (err) {
1870                         dev_info(&pdev->dev, "%s: unable to send to PF (%d)\n",
1871                                 __func__, err);
1872                         i40evf_shutdown_adminq(hw);
1873                         goto err;
1874                 }
1875                 adapter->state = __I40EVF_INIT_VERSION_CHECK;
1876                 goto restart;
1877                 break;
1878         case __I40EVF_INIT_VERSION_CHECK:
1879                 if (!i40evf_asq_done(hw))
1880                         goto err;
1881
1882                 /* aq msg sent, awaiting reply */
1883                 err = i40evf_verify_api_ver(adapter);
1884                 if (err) {
1885                         dev_err(&pdev->dev, "Unable to verify API version, error %d\n",
1886                                 err);
1887                         goto err;
1888                 }
1889                 err = i40evf_send_vf_config_msg(adapter);
1890                 if (err) {
1891                         dev_err(&pdev->dev, "Unable send config request, error %d\n",
1892                                 err);
1893                         goto err;
1894                 }
1895                 adapter->state = __I40EVF_INIT_GET_RESOURCES;
1896                 goto restart;
1897                 break;
1898         case __I40EVF_INIT_GET_RESOURCES:
1899                 /* aq msg sent, awaiting reply */
1900                 if (!adapter->vf_res) {
1901                         bufsz = sizeof(struct i40e_virtchnl_vf_resource) +
1902                                 (I40E_MAX_VF_VSI *
1903                                  sizeof(struct i40e_virtchnl_vsi_resource));
1904                         adapter->vf_res = kzalloc(bufsz, GFP_KERNEL);
1905                         if (!adapter->vf_res) {
1906                                 dev_err(&pdev->dev, "%s: unable to allocate memory\n",
1907                                         __func__);
1908                                 goto err;
1909                         }
1910                 }
1911                 err = i40evf_get_vf_config(adapter);
1912                 if (err == I40E_ERR_ADMIN_QUEUE_NO_WORK)
1913                         goto restart;
1914                 if (err) {
1915                         dev_info(&pdev->dev, "%s: unable to get VF config (%d)\n",
1916                                 __func__, err);
1917                         goto err_alloc;
1918                 }
1919                 adapter->state = __I40EVF_INIT_SW;
1920                 break;
1921         default:
1922                 goto err_alloc;
1923         }
1924         /* got VF config message back from PF, now we can parse it */
1925         for (i = 0; i < adapter->vf_res->num_vsis; i++) {
1926                 if (adapter->vf_res->vsi_res[i].vsi_type == I40E_VSI_SRIOV)
1927                         adapter->vsi_res = &adapter->vf_res->vsi_res[i];
1928         }
1929         if (!adapter->vsi_res) {
1930                 dev_info(&pdev->dev, "%s: no LAN VSI found\n", __func__);
1931                 goto err_alloc;
1932         }
1933
1934         adapter->flags |= I40EVF_FLAG_RX_CSUM_ENABLED;
1935
1936         adapter->txd_count = I40EVF_DEFAULT_TXD;
1937         adapter->rxd_count = I40EVF_DEFAULT_RXD;
1938
1939         netdev->netdev_ops = &i40evf_netdev_ops;
1940         i40evf_set_ethtool_ops(netdev);
1941         netdev->watchdog_timeo = 5 * HZ;
1942
1943         netdev->features |= NETIF_F_SG |
1944                             NETIF_F_IP_CSUM |
1945                             NETIF_F_SCTP_CSUM |
1946                             NETIF_F_IPV6_CSUM |
1947                             NETIF_F_TSO |
1948                             NETIF_F_TSO6 |
1949                             NETIF_F_GRO;
1950
1951         if (adapter->vf_res->vf_offload_flags
1952             & I40E_VIRTCHNL_VF_OFFLOAD_VLAN) {
1953                 netdev->vlan_features = netdev->features;
1954                 netdev->features |= NETIF_F_HW_VLAN_CTAG_TX |
1955                                     NETIF_F_HW_VLAN_CTAG_RX |
1956                                     NETIF_F_HW_VLAN_CTAG_FILTER;
1957         }
1958
1959         /* The HW MAC address was set and/or determined in sw_init */
1960         if (!is_valid_ether_addr(adapter->hw.mac.addr)) {
1961                 dev_info(&pdev->dev,
1962                         "Invalid MAC address %pMAC, using random\n",
1963                         adapter->hw.mac.addr);
1964                 random_ether_addr(adapter->hw.mac.addr);
1965         }
1966         memcpy(netdev->dev_addr, adapter->hw.mac.addr, netdev->addr_len);
1967         memcpy(netdev->perm_addr, adapter->hw.mac.addr, netdev->addr_len);
1968
1969         INIT_LIST_HEAD(&adapter->mac_filter_list);
1970         INIT_LIST_HEAD(&adapter->vlan_filter_list);
1971         f = kzalloc(sizeof(*f), GFP_ATOMIC);
1972         if (NULL == f)
1973                 goto err_sw_init;
1974
1975         memcpy(f->macaddr, adapter->hw.mac.addr, ETH_ALEN);
1976         f->add = true;
1977         adapter->aq_required |= I40EVF_FLAG_AQ_ADD_MAC_FILTER;
1978
1979         list_add(&f->list, &adapter->mac_filter_list);
1980
1981         init_timer(&adapter->watchdog_timer);
1982         adapter->watchdog_timer.function = &i40evf_watchdog_timer;
1983         adapter->watchdog_timer.data = (unsigned long)adapter;
1984         mod_timer(&adapter->watchdog_timer, jiffies + 1);
1985
1986         err = i40evf_init_interrupt_scheme(adapter);
1987         if (err)
1988                 goto err_sw_init;
1989         i40evf_map_rings_to_vectors(adapter);
1990         i40evf_configure_rss(adapter);
1991         err = i40evf_request_misc_irq(adapter);
1992         if (err)
1993                 goto err_sw_init;
1994
1995         netif_carrier_off(netdev);
1996
1997         strcpy(netdev->name, "eth%d");
1998
1999         adapter->vsi.id = adapter->vsi_res->vsi_id;
2000         adapter->vsi.seid = adapter->vsi_res->vsi_id; /* dummy */
2001         adapter->vsi.back = adapter;
2002         adapter->vsi.base_vector = 1;
2003         adapter->vsi.work_limit = I40E_DEFAULT_IRQ_WORK;
2004         adapter->vsi.rx_itr_setting = I40E_ITR_DYNAMIC;
2005         adapter->vsi.tx_itr_setting = I40E_ITR_DYNAMIC;
2006         adapter->vsi.netdev = adapter->netdev;
2007
2008         err = register_netdev(netdev);
2009         if (err)
2010                 goto err_register;
2011
2012         adapter->netdev_registered = true;
2013
2014         netif_tx_stop_all_queues(netdev);
2015
2016         dev_info(&pdev->dev, "MAC address: %pMAC\n", adapter->hw.mac.addr);
2017         if (netdev->features & NETIF_F_GRO)
2018                 dev_info(&pdev->dev, "GRO is enabled\n");
2019
2020         dev_info(&pdev->dev, "%s\n", i40evf_driver_string);
2021         adapter->state = __I40EVF_DOWN;
2022         set_bit(__I40E_DOWN, &adapter->vsi.state);
2023         i40evf_misc_irq_enable(adapter);
2024         return;
2025 restart:
2026         schedule_delayed_work(&adapter->init_task,
2027                               msecs_to_jiffies(50));
2028         return;
2029
2030 err_register:
2031         i40evf_free_misc_irq(adapter);
2032 err_sw_init:
2033         i40evf_reset_interrupt_capability(adapter);
2034         adapter->state = __I40EVF_FAILED;
2035 err_alloc:
2036         kfree(adapter->vf_res);
2037         adapter->vf_res = NULL;
2038 err:
2039         /* Things went into the weeds, so try again later */
2040         if (++adapter->aq_wait_count > I40EVF_AQ_MAX_ERR) {
2041                 dev_err(&pdev->dev, "Failed to communicate with PF; giving up.\n");
2042                 if (hw->aq.asq.count)
2043                         i40evf_shutdown_adminq(hw); /* ignore error */
2044                 adapter->state = __I40EVF_FAILED;
2045                 return; /* do not reschedule */
2046         }
2047         schedule_delayed_work(&adapter->init_task, HZ * 3);
2048         return;
2049 }
2050
2051 /**
2052  * i40evf_shutdown - Shutdown the device in preparation for a reboot
2053  * @pdev: pci device structure
2054  **/
2055 static void i40evf_shutdown(struct pci_dev *pdev)
2056 {
2057         struct net_device *netdev = pci_get_drvdata(pdev);
2058
2059         netif_device_detach(netdev);
2060
2061         if (netif_running(netdev))
2062                 i40evf_close(netdev);
2063
2064 #ifdef CONFIG_PM
2065         pci_save_state(pdev);
2066
2067 #endif
2068         pci_disable_device(pdev);
2069 }
2070
2071 /**
2072  * i40evf_probe - Device Initialization Routine
2073  * @pdev: PCI device information struct
2074  * @ent: entry in i40evf_pci_tbl
2075  *
2076  * Returns 0 on success, negative on failure
2077  *
2078  * i40evf_probe initializes an adapter identified by a pci_dev structure.
2079  * The OS initialization, configuring of the adapter private structure,
2080  * and a hardware reset occur.
2081  **/
2082 static int i40evf_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2083 {
2084         struct net_device *netdev;
2085         struct i40evf_adapter *adapter = NULL;
2086         struct i40e_hw *hw = NULL;
2087         int err, pci_using_dac;
2088
2089         err = pci_enable_device(pdev);
2090         if (err)
2091                 return err;
2092
2093         if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(64))) {
2094                 pci_using_dac = true;
2095                 /* coherent mask for the same size will always succeed if
2096                  * dma_set_mask does
2097                  */
2098                 dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(64));
2099         } else if (!dma_set_mask(&pdev->dev, DMA_BIT_MASK(32))) {
2100                 pci_using_dac = false;
2101                 dma_set_coherent_mask(&pdev->dev, DMA_BIT_MASK(32));
2102         } else {
2103                 dev_err(&pdev->dev, "%s: DMA configuration failed: %d\n",
2104                          __func__, err);
2105                 err = -EIO;
2106                 goto err_dma;
2107         }
2108
2109         err = pci_request_regions(pdev, i40evf_driver_name);
2110         if (err) {
2111                 dev_err(&pdev->dev,
2112                         "pci_request_regions failed 0x%x\n", err);
2113                 goto err_pci_reg;
2114         }
2115
2116         pci_enable_pcie_error_reporting(pdev);
2117
2118         pci_set_master(pdev);
2119
2120         netdev = alloc_etherdev_mq(sizeof(struct i40evf_adapter),
2121                                    MAX_TX_QUEUES);
2122         if (!netdev) {
2123                 err = -ENOMEM;
2124                 goto err_alloc_etherdev;
2125         }
2126
2127         SET_NETDEV_DEV(netdev, &pdev->dev);
2128
2129         pci_set_drvdata(pdev, netdev);
2130         adapter = netdev_priv(netdev);
2131         if (pci_using_dac)
2132                 netdev->features |= NETIF_F_HIGHDMA;
2133
2134         adapter->netdev = netdev;
2135         adapter->pdev = pdev;
2136
2137         hw = &adapter->hw;
2138         hw->back = adapter;
2139
2140         adapter->msg_enable = (1 << DEFAULT_DEBUG_LEVEL_SHIFT) - 1;
2141         adapter->state = __I40EVF_STARTUP;
2142
2143         /* Call save state here because it relies on the adapter struct. */
2144         pci_save_state(pdev);
2145
2146         hw->hw_addr = ioremap(pci_resource_start(pdev, 0),
2147                               pci_resource_len(pdev, 0));
2148         if (!hw->hw_addr) {
2149                 err = -EIO;
2150                 goto err_ioremap;
2151         }
2152         hw->vendor_id = pdev->vendor;
2153         hw->device_id = pdev->device;
2154         pci_read_config_byte(pdev, PCI_REVISION_ID, &hw->revision_id);
2155         hw->subsystem_vendor_id = pdev->subsystem_vendor;
2156         hw->subsystem_device_id = pdev->subsystem_device;
2157         hw->bus.device = PCI_SLOT(pdev->devfn);
2158         hw->bus.func = PCI_FUNC(pdev->devfn);
2159
2160         INIT_WORK(&adapter->reset_task, i40evf_reset_task);
2161         INIT_WORK(&adapter->adminq_task, i40evf_adminq_task);
2162         INIT_WORK(&adapter->watchdog_task, i40evf_watchdog_task);
2163         INIT_DELAYED_WORK(&adapter->init_task, i40evf_init_task);
2164         schedule_delayed_work(&adapter->init_task, 10);
2165
2166         return 0;
2167
2168 err_ioremap:
2169         free_netdev(netdev);
2170 err_alloc_etherdev:
2171         pci_release_regions(pdev);
2172 err_pci_reg:
2173 err_dma:
2174         pci_disable_device(pdev);
2175         return err;
2176 }
2177
2178 #ifdef CONFIG_PM
2179 /**
2180  * i40evf_suspend - Power management suspend routine
2181  * @pdev: PCI device information struct
2182  * @state: unused
2183  *
2184  * Called when the system (VM) is entering sleep/suspend.
2185  **/
2186 static int i40evf_suspend(struct pci_dev *pdev, pm_message_t state)
2187 {
2188         struct net_device *netdev = pci_get_drvdata(pdev);
2189         struct i40evf_adapter *adapter = netdev_priv(netdev);
2190         int retval = 0;
2191
2192         netif_device_detach(netdev);
2193
2194         if (netif_running(netdev)) {
2195                 rtnl_lock();
2196                 i40evf_down(adapter);
2197                 rtnl_unlock();
2198         }
2199         i40evf_free_misc_irq(adapter);
2200         i40evf_reset_interrupt_capability(adapter);
2201
2202         retval = pci_save_state(pdev);
2203         if (retval)
2204                 return retval;
2205
2206         pci_disable_device(pdev);
2207
2208         return 0;
2209 }
2210
2211 /**
2212  * i40evf_resume - Power managment resume routine
2213  * @pdev: PCI device information struct
2214  *
2215  * Called when the system (VM) is resumed from sleep/suspend.
2216  **/
2217 static int i40evf_resume(struct pci_dev *pdev)
2218 {
2219         struct i40evf_adapter *adapter = pci_get_drvdata(pdev);
2220         struct net_device *netdev = adapter->netdev;
2221         u32 err;
2222
2223         pci_set_power_state(pdev, PCI_D0);
2224         pci_restore_state(pdev);
2225         /* pci_restore_state clears dev->state_saved so call
2226          * pci_save_state to restore it.
2227          */
2228         pci_save_state(pdev);
2229
2230         err = pci_enable_device_mem(pdev);
2231         if (err) {
2232                 dev_err(&pdev->dev, "Cannot enable PCI device from suspend.\n");
2233                 return err;
2234         }
2235         pci_set_master(pdev);
2236
2237         rtnl_lock();
2238         err = i40evf_set_interrupt_capability(adapter);
2239         if (err) {
2240                 dev_err(&pdev->dev, "Cannot enable MSI-X interrupts.\n");
2241                 return err;
2242         }
2243         err = i40evf_request_misc_irq(adapter);
2244         rtnl_unlock();
2245         if (err) {
2246                 dev_err(&pdev->dev, "Cannot get interrupt vector.\n");
2247                 return err;
2248         }
2249
2250         schedule_work(&adapter->reset_task);
2251
2252         netif_device_attach(netdev);
2253
2254         return err;
2255 }
2256
2257 #endif /* CONFIG_PM */
2258 /**
2259  * i40evf_remove - Device Removal Routine
2260  * @pdev: PCI device information struct
2261  *
2262  * i40evf_remove is called by the PCI subsystem to alert the driver
2263  * that it should release a PCI device.  The could be caused by a
2264  * Hot-Plug event, or because the driver is going to be removed from
2265  * memory.
2266  **/
2267 static void i40evf_remove(struct pci_dev *pdev)
2268 {
2269         struct net_device *netdev = pci_get_drvdata(pdev);
2270         struct i40evf_adapter *adapter = netdev_priv(netdev);
2271         struct i40e_hw *hw = &adapter->hw;
2272
2273         cancel_delayed_work_sync(&adapter->init_task);
2274
2275         if (adapter->netdev_registered) {
2276                 unregister_netdev(netdev);
2277                 adapter->netdev_registered = false;
2278         }
2279         adapter->state = __I40EVF_REMOVE;
2280
2281         if (adapter->num_msix_vectors) {
2282                 i40evf_misc_irq_disable(adapter);
2283                 del_timer_sync(&adapter->watchdog_timer);
2284
2285                 flush_scheduled_work();
2286
2287                 i40evf_free_misc_irq(adapter);
2288
2289                 i40evf_reset_interrupt_capability(adapter);
2290         }
2291
2292         if (hw->aq.asq.count)
2293                 i40evf_shutdown_adminq(hw);
2294
2295         iounmap(hw->hw_addr);
2296         pci_release_regions(pdev);
2297
2298         i40evf_free_queues(adapter);
2299         kfree(adapter->vf_res);
2300
2301         free_netdev(netdev);
2302
2303         pci_disable_pcie_error_reporting(pdev);
2304
2305         pci_disable_device(pdev);
2306 }
2307
2308 static struct pci_driver i40evf_driver = {
2309         .name     = i40evf_driver_name,
2310         .id_table = i40evf_pci_tbl,
2311         .probe    = i40evf_probe,
2312         .remove   = i40evf_remove,
2313 #ifdef CONFIG_PM
2314         .suspend  = i40evf_suspend,
2315         .resume   = i40evf_resume,
2316 #endif
2317         .shutdown = i40evf_shutdown,
2318 };
2319
2320 /**
2321  * i40e_init_module - Driver Registration Routine
2322  *
2323  * i40e_init_module is the first routine called when the driver is
2324  * loaded. All it does is register with the PCI subsystem.
2325  **/
2326 static int __init i40evf_init_module(void)
2327 {
2328         int ret;
2329         pr_info("i40evf: %s - version %s\n", i40evf_driver_string,
2330                i40evf_driver_version);
2331
2332         pr_info("%s\n", i40evf_copyright);
2333
2334         ret = pci_register_driver(&i40evf_driver);
2335         return ret;
2336 }
2337
2338 module_init(i40evf_init_module);
2339
2340 /**
2341  * i40e_exit_module - Driver Exit Cleanup Routine
2342  *
2343  * i40e_exit_module is called just before the driver is removed
2344  * from memory.
2345  **/
2346 static void __exit i40evf_exit_module(void)
2347 {
2348         pci_unregister_driver(&i40evf_driver);
2349 }
2350
2351 module_exit(i40evf_exit_module);
2352
2353 /* i40evf_main.c */