drivers/net/ethernet/amazon/ena/ena_netdev.c

   1 /*
   2  * Copyright 2015 Amazon.com, Inc. or its affiliates.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  */
  32
  33 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  34
  35 #ifdef CONFIG_RFS_ACCEL
  36 #include <linux/cpu_rmap.h>
  37 #endif /* CONFIG_RFS_ACCEL */
  38 #include <linux/ethtool.h>
  39 #include <linux/if_vlan.h>
  40 #include <linux/kernel.h>
  41 #include <linux/module.h>
  42 #include <linux/moduleparam.h>
  43 #include <linux/numa.h>
  44 #include <linux/pci.h>
  45 #include <linux/utsname.h>
  46 #include <linux/version.h>
  47 #include <linux/vmalloc.h>
  48 #include <net/ip.h>
  49
  50 #include "ena_netdev.h"
  51 #include "ena_pci_id_tbl.h"
  52
  53 static char version[] = DEVICE_NAME " v" DRV_MODULE_VERSION "\n";
  54
  55 MODULE_AUTHOR("Amazon.com, Inc. or its affiliates");
  56 MODULE_DESCRIPTION(DEVICE_NAME);
  57 MODULE_LICENSE("GPL");
  58 MODULE_VERSION(DRV_MODULE_VERSION);
  59
  60 /* Time in jiffies before concluding the transmitter is hung. */
  61 #define TX_TIMEOUT  (5 * HZ)
  62
  63 #define ENA_NAPI_BUDGET 64
  64
  65 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_IFUP | \
  66                 NETIF_MSG_TX_DONE | NETIF_MSG_TX_ERR | NETIF_MSG_RX_ERR)
  67 static int debug = -1;
  68 module_param(debug, int, 0);
  69 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
  70
  71 static struct ena_aenq_handlers aenq_handlers;
  72
  73 static struct workqueue_struct *ena_wq;
  74
  75 MODULE_DEVICE_TABLE(pci, ena_pci_tbl);
  76
  77 static int ena_rss_init_default(struct ena_adapter *adapter);
  78
  79 static void ena_tx_timeout(struct net_device *dev)
  80 {
  81         struct ena_adapter *adapter = netdev_priv(dev);
  82
  83         /* Change the state of the device to trigger reset
  84          * Check that we are not in the middle or a trigger already
  85          */
  86
  87         if (test_and_set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags))
  88                 return;
  89
  90         u64_stats_update_begin(&adapter->syncp);
  91         adapter->dev_stats.tx_timeout++;
  92         u64_stats_update_end(&adapter->syncp);
  93
  94         netif_err(adapter, tx_err, dev, "Transmit time out\n");
  95 }
  96
  97 static void update_rx_ring_mtu(struct ena_adapter *adapter, int mtu)
  98 {
  99         int i;
 100
 101         for (i = 0; i < adapter->num_queues; i++)
 102                 adapter->rx_ring[i].mtu = mtu;
 103 }
 104
 105 static int ena_change_mtu(struct net_device *dev, int new_mtu)
 106 {
 107         struct ena_adapter *adapter = netdev_priv(dev);
 108         int ret;
 109
 110         ret = ena_com_set_dev_mtu(adapter->ena_dev, new_mtu);
 111         if (!ret) {
 112                 netif_dbg(adapter, drv, dev, "set MTU to %d\n", new_mtu);
 113                 update_rx_ring_mtu(adapter, new_mtu);
 114                 dev->mtu = new_mtu;
 115         } else {
 116                 netif_err(adapter, drv, dev, "Failed to set MTU to %d\n",
 117                           new_mtu);
 118         }
 119
 120         return ret;
 121 }
 122
 123 static int ena_init_rx_cpu_rmap(struct ena_adapter *adapter)
 124 {
 125 #ifdef CONFIG_RFS_ACCEL
 126         u32 i;
 127         int rc;
 128
 129         adapter->netdev->rx_cpu_rmap = alloc_irq_cpu_rmap(adapter->num_queues);
 130         if (!adapter->netdev->rx_cpu_rmap)
 131                 return -ENOMEM;
 132         for (i = 0; i < adapter->num_queues; i++) {
 133                 int irq_idx = ENA_IO_IRQ_IDX(i);
 134
 135                 rc = irq_cpu_rmap_add(adapter->netdev->rx_cpu_rmap,
 136                                       pci_irq_vector(adapter->pdev, irq_idx));
 137                 if (rc) {
 138                         free_irq_cpu_rmap(adapter->netdev->rx_cpu_rmap);
 139                         adapter->netdev->rx_cpu_rmap = NULL;
 140                         return rc;
 141                 }
 142         }
 143 #endif /* CONFIG_RFS_ACCEL */
 144         return 0;
 145 }
 146
 147 static void ena_init_io_rings_common(struct ena_adapter *adapter,
 148                                      struct ena_ring *ring, u16 qid)
 149 {
 150         ring->qid = qid;
 151         ring->pdev = adapter->pdev;
 152         ring->dev = &adapter->pdev->dev;
 153         ring->netdev = adapter->netdev;
 154         ring->napi = &adapter->ena_napi[qid].napi;
 155         ring->adapter = adapter;
 156         ring->ena_dev = adapter->ena_dev;
 157         ring->per_napi_packets = 0;
 158         ring->per_napi_bytes = 0;
 159         ring->cpu = 0;
 160         u64_stats_init(&ring->syncp);
 161 }
 162
 163 static void ena_init_io_rings(struct ena_adapter *adapter)
 164 {
 165         struct ena_com_dev *ena_dev;
 166         struct ena_ring *txr, *rxr;
 167         int i;
 168
 169         ena_dev = adapter->ena_dev;
 170
 171         for (i = 0; i < adapter->num_queues; i++) {
 172                 txr = &adapter->tx_ring[i];
 173                 rxr = &adapter->rx_ring[i];
 174
 175                 /* TX/RX common ring state */
 176                 ena_init_io_rings_common(adapter, txr, i);
 177                 ena_init_io_rings_common(adapter, rxr, i);
 178
 179                 /* TX specific ring state */
 180                 txr->ring_size = adapter->tx_ring_size;
 181                 txr->tx_max_header_size = ena_dev->tx_max_header_size;
 182                 txr->tx_mem_queue_type = ena_dev->tx_mem_queue_type;
 183                 txr->sgl_size = adapter->max_tx_sgl_size;
 184                 txr->smoothed_interval =
 185                         ena_com_get_nonadaptive_moderation_interval_tx(ena_dev);
 186
 187                 /* RX specific ring state */
 188                 rxr->ring_size = adapter->rx_ring_size;
 189                 rxr->rx_copybreak = adapter->rx_copybreak;
 190                 rxr->sgl_size = adapter->max_rx_sgl_size;
 191                 rxr->smoothed_interval =
 192                         ena_com_get_nonadaptive_moderation_interval_rx(ena_dev);
 193         }
 194 }
 195
 196 /* ena_setup_tx_resources - allocate I/O Tx resources (Descriptors)
 197  * @adapter: network interface device structure
 198  * @qid: queue index
 199  *
 200  * Return 0 on success, negative on failure
 201  */
 202 static int ena_setup_tx_resources(struct ena_adapter *adapter, int qid)
 203 {
 204         struct ena_ring *tx_ring = &adapter->tx_ring[qid];
 205         struct ena_irq *ena_irq = &adapter->irq_tbl[ENA_IO_IRQ_IDX(qid)];
 206         int size, i, node;
 207
 208         if (tx_ring->tx_buffer_info) {
 209                 netif_err(adapter, ifup,
 210                           adapter->netdev, "tx_buffer_info info is not NULL");
 211                 return -EEXIST;
 212         }
 213
 214         size = sizeof(struct ena_tx_buffer) * tx_ring->ring_size;
 215         node = cpu_to_node(ena_irq->cpu);
 216
 217         tx_ring->tx_buffer_info = vzalloc_node(size, node);
 218         if (!tx_ring->tx_buffer_info) {
 219                 tx_ring->tx_buffer_info = vzalloc(size);
 220                 if (!tx_ring->tx_buffer_info)
 221                         return -ENOMEM;
 222         }
 223
 224         size = sizeof(u16) * tx_ring->ring_size;
 225         tx_ring->free_tx_ids = vzalloc_node(size, node);
 226         if (!tx_ring->free_tx_ids) {
 227                 tx_ring->free_tx_ids = vzalloc(size);
 228                 if (!tx_ring->free_tx_ids) {
 229                         vfree(tx_ring->tx_buffer_info);
 230                         return -ENOMEM;
 231                 }
 232         }
 233
 234         /* Req id ring for TX out of order completions */
 235         for (i = 0; i < tx_ring->ring_size; i++)
 236                 tx_ring->free_tx_ids[i] = i;
 237
 238         /* Reset tx statistics */
 239         memset(&tx_ring->tx_stats, 0x0, sizeof(tx_ring->tx_stats));
 240
 241         tx_ring->next_to_use = 0;
 242         tx_ring->next_to_clean = 0;
 243         tx_ring->cpu = ena_irq->cpu;
 244         return 0;
 245 }
 246
 247 /* ena_free_tx_resources - Free I/O Tx Resources per Queue
 248  * @adapter: network interface device structure
 249  * @qid: queue index
 250  *
 251  * Free all transmit software resources
 252  */
 253 static void ena_free_tx_resources(struct ena_adapter *adapter, int qid)
 254 {
 255         struct ena_ring *tx_ring = &adapter->tx_ring[qid];
 256
 257         vfree(tx_ring->tx_buffer_info);
 258         tx_ring->tx_buffer_info = NULL;
 259
 260         vfree(tx_ring->free_tx_ids);
 261         tx_ring->free_tx_ids = NULL;
 262 }
 263
 264 /* ena_setup_all_tx_resources - allocate I/O Tx queues resources for All queues
 265  * @adapter: private structure
 266  *
 267  * Return 0 on success, negative on failure
 268  */
 269 static int ena_setup_all_tx_resources(struct ena_adapter *adapter)
 270 {
 271         int i, rc = 0;
 272
 273         for (i = 0; i < adapter->num_queues; i++) {
 274                 rc = ena_setup_tx_resources(adapter, i);
 275                 if (rc)
 276                         goto err_setup_tx;
 277         }
 278
 279         return 0;
 280
 281 err_setup_tx:
 282
 283         netif_err(adapter, ifup, adapter->netdev,
 284                   "Tx queue %d: allocation failed\n", i);
 285
 286         /* rewind the index freeing the rings as we go */
 287         while (i--)
 288                 ena_free_tx_resources(adapter, i);
 289         return rc;
 290 }
 291
 292 /* ena_free_all_io_tx_resources - Free I/O Tx Resources for All Queues
 293  * @adapter: board private structure
 294  *
 295  * Free all transmit software resources
 296  */
 297 static void ena_free_all_io_tx_resources(struct ena_adapter *adapter)
 298 {
 299         int i;
 300
 301         for (i = 0; i < adapter->num_queues; i++)
 302                 ena_free_tx_resources(adapter, i);
 303 }
 304
 305 /* ena_setup_rx_resources - allocate I/O Rx resources (Descriptors)
 306  * @adapter: network interface device structure
 307  * @qid: queue index
 308  *
 309  * Returns 0 on success, negative on failure
 310  */
 311 static int ena_setup_rx_resources(struct ena_adapter *adapter,
 312                                   u32 qid)
 313 {
 314         struct ena_ring *rx_ring = &adapter->rx_ring[qid];
 315         struct ena_irq *ena_irq = &adapter->irq_tbl[ENA_IO_IRQ_IDX(qid)];
 316         int size, node;
 317
 318         if (rx_ring->rx_buffer_info) {
 319                 netif_err(adapter, ifup, adapter->netdev,
 320                           "rx_buffer_info is not NULL");
 321                 return -EEXIST;
 322         }
 323
 324         /* alloc extra element so in rx path
 325          * we can always prefetch rx_info + 1
 326          */
 327         size = sizeof(struct ena_rx_buffer) * (rx_ring->ring_size + 1);
 328         node = cpu_to_node(ena_irq->cpu);
 329
 330         rx_ring->rx_buffer_info = vzalloc_node(size, node);
 331         if (!rx_ring->rx_buffer_info) {
 332                 rx_ring->rx_buffer_info = vzalloc(size);
 333                 if (!rx_ring->rx_buffer_info)
 334                         return -ENOMEM;
 335         }
 336
 337         /* Reset rx statistics */
 338         memset(&rx_ring->rx_stats, 0x0, sizeof(rx_ring->rx_stats));
 339
 340         rx_ring->next_to_clean = 0;
 341         rx_ring->next_to_use = 0;
 342         rx_ring->cpu = ena_irq->cpu;
 343
 344         return 0;
 345 }
 346
 347 /* ena_free_rx_resources - Free I/O Rx Resources
 348  * @adapter: network interface device structure
 349  * @qid: queue index
 350  *
 351  * Free all receive software resources
 352  */
 353 static void ena_free_rx_resources(struct ena_adapter *adapter,
 354                                   u32 qid)
 355 {
 356         struct ena_ring *rx_ring = &adapter->rx_ring[qid];
 357
 358         vfree(rx_ring->rx_buffer_info);
 359         rx_ring->rx_buffer_info = NULL;
 360 }
 361
 362 /* ena_setup_all_rx_resources - allocate I/O Rx queues resources for all queues
 363  * @adapter: board private structure
 364  *
 365  * Return 0 on success, negative on failure
 366  */
 367 static int ena_setup_all_rx_resources(struct ena_adapter *adapter)
 368 {
 369         int i, rc = 0;
 370
 371         for (i = 0; i < adapter->num_queues; i++) {
 372                 rc = ena_setup_rx_resources(adapter, i);
 373                 if (rc)
 374                         goto err_setup_rx;
 375         }
 376
 377         return 0;
 378
 379 err_setup_rx:
 380
 381         netif_err(adapter, ifup, adapter->netdev,
 382                   "Rx queue %d: allocation failed\n", i);
 383
 384         /* rewind the index freeing the rings as we go */
 385         while (i--)
 386                 ena_free_rx_resources(adapter, i);
 387         return rc;
 388 }
 389
 390 /* ena_free_all_io_rx_resources - Free I/O Rx Resources for All Queues
 391  * @adapter: board private structure
 392  *
 393  * Free all receive software resources
 394  */
 395 static void ena_free_all_io_rx_resources(struct ena_adapter *adapter)
 396 {
 397         int i;
 398
 399         for (i = 0; i < adapter->num_queues; i++)
 400                 ena_free_rx_resources(adapter, i);
 401 }
 402
 403 static inline int ena_alloc_rx_page(struct ena_ring *rx_ring,
 404                                     struct ena_rx_buffer *rx_info, gfp_t gfp)
 405 {
 406         struct ena_com_buf *ena_buf;
 407         struct page *page;
 408         dma_addr_t dma;
 409
 410         /* if previous allocated page is not used */
 411         if (unlikely(rx_info->page))
 412                 return 0;
 413
 414         page = alloc_page(gfp);
 415         if (unlikely(!page)) {
 416                 u64_stats_update_begin(&rx_ring->syncp);
 417                 rx_ring->rx_stats.page_alloc_fail++;
 418                 u64_stats_update_end(&rx_ring->syncp);
 419                 return -ENOMEM;
 420         }
 421
 422         dma = dma_map_page(rx_ring->dev, page, 0, PAGE_SIZE,
 423                            DMA_FROM_DEVICE);
 424         if (unlikely(dma_mapping_error(rx_ring->dev, dma))) {
 425                 u64_stats_update_begin(&rx_ring->syncp);
 426                 rx_ring->rx_stats.dma_mapping_err++;
 427                 u64_stats_update_end(&rx_ring->syncp);
 428
 429                 __free_page(page);
 430                 return -EIO;
 431         }
 432         netif_dbg(rx_ring->adapter, rx_status, rx_ring->netdev,
 433                   "alloc page %p, rx_info %p\n", page, rx_info);
 434
 435         rx_info->page = page;
 436         rx_info->page_offset = 0;
 437         ena_buf = &rx_info->ena_buf;
 438         ena_buf->paddr = dma;
 439         ena_buf->len = PAGE_SIZE;
 440
 441         return 0;
 442 }
 443
 444 static void ena_free_rx_page(struct ena_ring *rx_ring,
 445                              struct ena_rx_buffer *rx_info)
 446 {
 447         struct page *page = rx_info->page;
 448         struct ena_com_buf *ena_buf = &rx_info->ena_buf;
 449
 450         if (unlikely(!page)) {
 451                 netif_warn(rx_ring->adapter, rx_err, rx_ring->netdev,
 452                            "Trying to free unallocated buffer\n");
 453                 return;
 454         }
 455
 456         dma_unmap_page(rx_ring->dev, ena_buf->paddr, PAGE_SIZE,
 457                        DMA_FROM_DEVICE);
 458
 459         __free_page(page);
 460         rx_info->page = NULL;
 461 }
 462
 463 static int ena_refill_rx_bufs(struct ena_ring *rx_ring, u32 num)
 464 {
 465         u16 next_to_use;
 466         u32 i;
 467         int rc;
 468
 469         next_to_use = rx_ring->next_to_use;
 470
 471         for (i = 0; i < num; i++) {
 472                 struct ena_rx_buffer *rx_info =
 473                         &rx_ring->rx_buffer_info[next_to_use];
 474
 475                 rc = ena_alloc_rx_page(rx_ring, rx_info,
 476                                        __GFP_COLD | GFP_ATOMIC | __GFP_COMP);
 477                 if (unlikely(rc < 0)) {
 478                         netif_warn(rx_ring->adapter, rx_err, rx_ring->netdev,
 479                                    "failed to alloc buffer for rx queue %d\n",
 480                                    rx_ring->qid);
 481                         break;
 482                 }
 483                 rc = ena_com_add_single_rx_desc(rx_ring->ena_com_io_sq,
 484                                                 &rx_info->ena_buf,
 485                                                 next_to_use);
 486                 if (unlikely(rc)) {
 487                         netif_warn(rx_ring->adapter, rx_status, rx_ring->netdev,
 488                                    "failed to add buffer for rx queue %d\n",
 489                                    rx_ring->qid);
 490                         break;
 491                 }
 492                 next_to_use = ENA_RX_RING_IDX_NEXT(next_to_use,
 493                                                    rx_ring->ring_size);
 494         }
 495
 496         if (unlikely(i < num)) {
 497                 u64_stats_update_begin(&rx_ring->syncp);
 498                 rx_ring->rx_stats.refil_partial++;
 499                 u64_stats_update_end(&rx_ring->syncp);
 500                 netdev_warn(rx_ring->netdev,
 501                             "refilled rx qid %d with only %d buffers (from %d)\n",
 502                             rx_ring->qid, i, num);
 503         }
 504
 505         if (likely(i)) {
 506                 /* Add memory barrier to make sure the desc were written before
 507                  * issue a doorbell
 508                  */
 509                 wmb();
 510                 ena_com_write_sq_doorbell(rx_ring->ena_com_io_sq);
 511         }
 512
 513         rx_ring->next_to_use = next_to_use;
 514
 515         return i;
 516 }
 517
 518 static void ena_free_rx_bufs(struct ena_adapter *adapter,
 519                              u32 qid)
 520 {
 521         struct ena_ring *rx_ring = &adapter->rx_ring[qid];
 522         u32 i;
 523
 524         for (i = 0; i < rx_ring->ring_size; i++) {
 525                 struct ena_rx_buffer *rx_info = &rx_ring->rx_buffer_info[i];
 526
 527                 if (rx_info->page)
 528                         ena_free_rx_page(rx_ring, rx_info);
 529         }
 530 }
 531
 532 /* ena_refill_all_rx_bufs - allocate all queues Rx buffers
 533  * @adapter: board private structure
 534  *
 535  */
 536 static void ena_refill_all_rx_bufs(struct ena_adapter *adapter)
 537 {
 538         struct ena_ring *rx_ring;
 539         int i, rc, bufs_num;
 540
 541         for (i = 0; i < adapter->num_queues; i++) {
 542                 rx_ring = &adapter->rx_ring[i];
 543                 bufs_num = rx_ring->ring_size - 1;
 544                 rc = ena_refill_rx_bufs(rx_ring, bufs_num);
 545
 546                 if (unlikely(rc != bufs_num))
 547                         netif_warn(rx_ring->adapter, rx_status, rx_ring->netdev,
 548                                    "refilling Queue %d failed. allocated %d buffers from: %d\n",
 549                                    i, rc, bufs_num);
 550         }
 551 }
 552
 553 static void ena_free_all_rx_bufs(struct ena_adapter *adapter)
 554 {
 555         int i;
 556
 557         for (i = 0; i < adapter->num_queues; i++)
 558                 ena_free_rx_bufs(adapter, i);
 559 }
 560
 561 /* ena_free_tx_bufs - Free Tx Buffers per Queue
 562  * @tx_ring: TX ring for which buffers be freed
 563  */
 564 static void ena_free_tx_bufs(struct ena_ring *tx_ring)
 565 {
 566         bool print_once = true;
 567         u32 i;
 568
 569         for (i = 0; i < tx_ring->ring_size; i++) {
 570                 struct ena_tx_buffer *tx_info = &tx_ring->tx_buffer_info[i];
 571                 struct ena_com_buf *ena_buf;
 572                 int nr_frags;
 573                 int j;
 574
 575                 if (!tx_info->skb)
 576                         continue;
 577
 578                 if (print_once) {
 579                         netdev_notice(tx_ring->netdev,
 580                                       "free uncompleted tx skb qid %d idx 0x%x\n",
 581                                       tx_ring->qid, i);
 582                         print_once = false;
 583                 } else {
 584                         netdev_dbg(tx_ring->netdev,
 585                                    "free uncompleted tx skb qid %d idx 0x%x\n",
 586                                    tx_ring->qid, i);
 587                 }
 588
 589                 ena_buf = tx_info->bufs;
 590                 dma_unmap_single(tx_ring->dev,
 591                                  ena_buf->paddr,
 592                                  ena_buf->len,
 593                                  DMA_TO_DEVICE);
 594
 595                 /* unmap remaining mapped pages */
 596                 nr_frags = tx_info->num_of_bufs - 1;
 597                 for (j = 0; j < nr_frags; j++) {
 598                         ena_buf++;
 599                         dma_unmap_page(tx_ring->dev,
 600                                        ena_buf->paddr,
 601                                        ena_buf->len,
 602                                        DMA_TO_DEVICE);
 603                 }
 604
 605                 dev_kfree_skb_any(tx_info->skb);
 606         }
 607         netdev_tx_reset_queue(netdev_get_tx_queue(tx_ring->netdev,
 608                                                   tx_ring->qid));
 609 }
 610
 611 static void ena_free_all_tx_bufs(struct ena_adapter *adapter)
 612 {
 613         struct ena_ring *tx_ring;
 614         int i;
 615
 616         for (i = 0; i < adapter->num_queues; i++) {
 617                 tx_ring = &adapter->tx_ring[i];
 618                 ena_free_tx_bufs(tx_ring);
 619         }
 620 }
 621
 622 static void ena_destroy_all_tx_queues(struct ena_adapter *adapter)
 623 {
 624         u16 ena_qid;
 625         int i;
 626
 627         for (i = 0; i < adapter->num_queues; i++) {
 628                 ena_qid = ENA_IO_TXQ_IDX(i);
 629                 ena_com_destroy_io_queue(adapter->ena_dev, ena_qid);
 630         }
 631 }
 632
 633 static void ena_destroy_all_rx_queues(struct ena_adapter *adapter)
 634 {
 635         u16 ena_qid;
 636         int i;
 637
 638         for (i = 0; i < adapter->num_queues; i++) {
 639                 ena_qid = ENA_IO_RXQ_IDX(i);
 640                 ena_com_destroy_io_queue(adapter->ena_dev, ena_qid);
 641         }
 642 }
 643
 644 static void ena_destroy_all_io_queues(struct ena_adapter *adapter)
 645 {
 646         ena_destroy_all_tx_queues(adapter);
 647         ena_destroy_all_rx_queues(adapter);
 648 }
 649
 650 static int validate_tx_req_id(struct ena_ring *tx_ring, u16 req_id)
 651 {
 652         struct ena_tx_buffer *tx_info = NULL;
 653
 654         if (likely(req_id < tx_ring->ring_size)) {
 655                 tx_info = &tx_ring->tx_buffer_info[req_id];
 656                 if (likely(tx_info->skb))
 657                         return 0;
 658         }
 659
 660         if (tx_info)
 661                 netif_err(tx_ring->adapter, tx_done, tx_ring->netdev,
 662                           "tx_info doesn't have valid skb\n");
 663         else
 664                 netif_err(tx_ring->adapter, tx_done, tx_ring->netdev,
 665                           "Invalid req_id: %hu\n", req_id);
 666
 667         u64_stats_update_begin(&tx_ring->syncp);
 668         tx_ring->tx_stats.bad_req_id++;
 669         u64_stats_update_end(&tx_ring->syncp);
 670
 671         /* Trigger device reset */
 672         set_bit(ENA_FLAG_TRIGGER_RESET, &tx_ring->adapter->flags);
 673         return -EFAULT;
 674 }
 675
 676 static int ena_clean_tx_irq(struct ena_ring *tx_ring, u32 budget)
 677 {
 678         struct netdev_queue *txq;
 679         bool above_thresh;
 680         u32 tx_bytes = 0;
 681         u32 total_done = 0;
 682         u16 next_to_clean;
 683         u16 req_id;
 684         int tx_pkts = 0;
 685         int rc;
 686
 687         next_to_clean = tx_ring->next_to_clean;
 688         txq = netdev_get_tx_queue(tx_ring->netdev, tx_ring->qid);
 689
 690         while (tx_pkts < budget) {
 691                 struct ena_tx_buffer *tx_info;
 692                 struct sk_buff *skb;
 693                 struct ena_com_buf *ena_buf;
 694                 int i, nr_frags;
 695
 696                 rc = ena_com_tx_comp_req_id_get(tx_ring->ena_com_io_cq,
 697                                                 &req_id);
 698                 if (rc)
 699                         break;
 700
 701                 rc = validate_tx_req_id(tx_ring, req_id);
 702                 if (rc)
 703                         break;
 704
 705                 tx_info = &tx_ring->tx_buffer_info[req_id];
 706                 skb = tx_info->skb;
 707
 708                 /* prefetch skb_end_pointer() to speedup skb_shinfo(skb) */
 709                 prefetch(&skb->end);
 710
 711                 tx_info->skb = NULL;
 712                 tx_info->last_jiffies = 0;
 713
 714                 if (likely(tx_info->num_of_bufs != 0)) {
 715                         ena_buf = tx_info->bufs;
 716
 717                         dma_unmap_single(tx_ring->dev,
 718                                          dma_unmap_addr(ena_buf, paddr),
 719                                          dma_unmap_len(ena_buf, len),
 720                                          DMA_TO_DEVICE);
 721
 722                         /* unmap remaining mapped pages */
 723                         nr_frags = tx_info->num_of_bufs - 1;
 724                         for (i = 0; i < nr_frags; i++) {
 725                                 ena_buf++;
 726                                 dma_unmap_page(tx_ring->dev,
 727                                                dma_unmap_addr(ena_buf, paddr),
 728                                                dma_unmap_len(ena_buf, len),
 729                                                DMA_TO_DEVICE);
 730                         }
 731                 }
 732
 733                 netif_dbg(tx_ring->adapter, tx_done, tx_ring->netdev,
 734                           "tx_poll: q %d skb %p completed\n", tx_ring->qid,
 735                           skb);
 736
 737                 tx_bytes += skb->len;
 738                 dev_kfree_skb(skb);
 739                 tx_pkts++;
 740                 total_done += tx_info->tx_descs;
 741
 742                 tx_ring->free_tx_ids[next_to_clean] = req_id;
 743                 next_to_clean = ENA_TX_RING_IDX_NEXT(next_to_clean,
 744                                                      tx_ring->ring_size);
 745         }
 746
 747         tx_ring->next_to_clean = next_to_clean;
 748         ena_com_comp_ack(tx_ring->ena_com_io_sq, total_done);
 749         ena_com_update_dev_comp_head(tx_ring->ena_com_io_cq);
 750
 751         netdev_tx_completed_queue(txq, tx_pkts, tx_bytes);
 752
 753         netif_dbg(tx_ring->adapter, tx_done, tx_ring->netdev,
 754                   "tx_poll: q %d done. total pkts: %d\n",
 755                   tx_ring->qid, tx_pkts);
 756
 757         /* need to make the rings circular update visible to
 758          * ena_start_xmit() before checking for netif_queue_stopped().
 759          */
 760         smp_mb();
 761
 762         above_thresh = ena_com_sq_empty_space(tx_ring->ena_com_io_sq) >
 763                 ENA_TX_WAKEUP_THRESH;
 764         if (unlikely(netif_tx_queue_stopped(txq) && above_thresh)) {
 765                 __netif_tx_lock(txq, smp_processor_id());
 766                 above_thresh = ena_com_sq_empty_space(tx_ring->ena_com_io_sq) >
 767                         ENA_TX_WAKEUP_THRESH;
 768                 if (netif_tx_queue_stopped(txq) && above_thresh) {
 769                         netif_tx_wake_queue(txq);
 770                         u64_stats_update_begin(&tx_ring->syncp);
 771                         tx_ring->tx_stats.queue_wakeup++;
 772                         u64_stats_update_end(&tx_ring->syncp);
 773                 }
 774                 __netif_tx_unlock(txq);
 775         }
 776
 777         tx_ring->per_napi_bytes += tx_bytes;
 778         tx_ring->per_napi_packets += tx_pkts;
 779
 780         return tx_pkts;
 781 }
 782
 783 static struct sk_buff *ena_rx_skb(struct ena_ring *rx_ring,
 784                                   struct ena_com_rx_buf_info *ena_bufs,
 785                                   u32 descs,
 786                                   u16 *next_to_clean)
 787 {
 788         struct sk_buff *skb;
 789         struct ena_rx_buffer *rx_info =
 790                 &rx_ring->rx_buffer_info[*next_to_clean];
 791         u32 len;
 792         u32 buf = 0;
 793         void *va;
 794
 795         len = ena_bufs[0].len;
 796         if (unlikely(!rx_info->page)) {
 797                 netif_err(rx_ring->adapter, rx_err, rx_ring->netdev,
 798                           "Page is NULL\n");
 799                 return NULL;
 800         }
 801
 802         netif_dbg(rx_ring->adapter, rx_status, rx_ring->netdev,
 803                   "rx_info %p page %p\n",
 804                   rx_info, rx_info->page);
 805
 806         /* save virt address of first buffer */
 807         va = page_address(rx_info->page) + rx_info->page_offset;
 808         prefetch(va + NET_IP_ALIGN);
 809
 810         if (len <= rx_ring->rx_copybreak) {
 811                 skb = netdev_alloc_skb_ip_align(rx_ring->netdev,
 812                                                 rx_ring->rx_copybreak);
 813                 if (unlikely(!skb)) {
 814                         u64_stats_update_begin(&rx_ring->syncp);
 815                         rx_ring->rx_stats.skb_alloc_fail++;
 816                         u64_stats_update_end(&rx_ring->syncp);
 817                         netif_err(rx_ring->adapter, rx_err, rx_ring->netdev,
 818                                   "Failed to allocate skb\n");
 819                         return NULL;
 820                 }
 821
 822                 netif_dbg(rx_ring->adapter, rx_status, rx_ring->netdev,
 823                           "rx allocated small packet. len %d. data_len %d\n",
 824                           skb->len, skb->data_len);
 825
 826                 /* sync this buffer for CPU use */
 827                 dma_sync_single_for_cpu(rx_ring->dev,
 828                                         dma_unmap_addr(&rx_info->ena_buf, paddr),
 829                                         len,
 830                                         DMA_FROM_DEVICE);
 831                 skb_copy_to_linear_data(skb, va, len);
 832                 dma_sync_single_for_device(rx_ring->dev,
 833                                            dma_unmap_addr(&rx_info->ena_buf, paddr),
 834                                            len,
 835                                            DMA_FROM_DEVICE);
 836
 837                 skb_put(skb, len);
 838                 skb->protocol = eth_type_trans(skb, rx_ring->netdev);
 839                 *next_to_clean = ENA_RX_RING_IDX_ADD(*next_to_clean, descs,
 840                                                      rx_ring->ring_size);
 841                 return skb;
 842         }
 843
 844         skb = napi_get_frags(rx_ring->napi);
 845         if (unlikely(!skb)) {
 846                 netif_dbg(rx_ring->adapter, rx_status, rx_ring->netdev,
 847                           "Failed allocating skb\n");
 848                 u64_stats_update_begin(&rx_ring->syncp);
 849                 rx_ring->rx_stats.skb_alloc_fail++;
 850                 u64_stats_update_end(&rx_ring->syncp);
 851                 return NULL;
 852         }
 853
 854         do {
 855                 dma_unmap_page(rx_ring->dev,
 856                                dma_unmap_addr(&rx_info->ena_buf, paddr),
 857                                PAGE_SIZE, DMA_FROM_DEVICE);
 858
 859                 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, rx_info->page,
 860                                 rx_info->page_offset, len, PAGE_SIZE);
 861
 862                 netif_dbg(rx_ring->adapter, rx_status, rx_ring->netdev,
 863                           "rx skb updated. len %d. data_len %d\n",
 864                           skb->len, skb->data_len);
 865
 866                 rx_info->page = NULL;
 867                 *next_to_clean =
 868                         ENA_RX_RING_IDX_NEXT(*next_to_clean,
 869                                              rx_ring->ring_size);
 870                 if (likely(--descs == 0))
 871                         break;
 872                 rx_info = &rx_ring->rx_buffer_info[*next_to_clean];
 873                 len = ena_bufs[++buf].len;
 874         } while (1);
 875
 876         return skb;
 877 }
 878
 879 /* ena_rx_checksum - indicate in skb if hw indicated a good cksum
 880  * @adapter: structure containing adapter specific data
 881  * @ena_rx_ctx: received packet context/metadata
 882  * @skb: skb currently being received and modified
 883  */
 884 static inline void ena_rx_checksum(struct ena_ring *rx_ring,
 885                                    struct ena_com_rx_ctx *ena_rx_ctx,
 886                                    struct sk_buff *skb)
 887 {
 888         /* Rx csum disabled */
 889         if (unlikely(!(rx_ring->netdev->features & NETIF_F_RXCSUM))) {
 890                 skb->ip_summed = CHECKSUM_NONE;
 891                 return;
 892         }
 893
 894         /* For fragmented packets the checksum isn't valid */
 895         if (ena_rx_ctx->frag) {
 896                 skb->ip_summed = CHECKSUM_NONE;
 897                 return;
 898         }
 899
 900         /* if IP and error */
 901         if (unlikely((ena_rx_ctx->l3_proto == ENA_ETH_IO_L3_PROTO_IPV4) &&
 902                      (ena_rx_ctx->l3_csum_err))) {
 903                 /* ipv4 checksum error */
 904                 skb->ip_summed = CHECKSUM_NONE;
 905                 u64_stats_update_begin(&rx_ring->syncp);
 906                 rx_ring->rx_stats.bad_csum++;
 907                 u64_stats_update_end(&rx_ring->syncp);
 908                 netif_err(rx_ring->adapter, rx_err, rx_ring->netdev,
 909                           "RX IPv4 header checksum error\n");
 910                 return;
 911         }
 912
 913         /* if TCP/UDP */
 914         if (likely((ena_rx_ctx->l4_proto == ENA_ETH_IO_L4_PROTO_TCP) ||
 915                    (ena_rx_ctx->l4_proto == ENA_ETH_IO_L4_PROTO_UDP))) {
 916                 if (unlikely(ena_rx_ctx->l4_csum_err)) {
 917                         /* TCP/UDP checksum error */
 918                         u64_stats_update_begin(&rx_ring->syncp);
 919                         rx_ring->rx_stats.bad_csum++;
 920                         u64_stats_update_end(&rx_ring->syncp);
 921                         netif_err(rx_ring->adapter, rx_err, rx_ring->netdev,
 922                                   "RX L4 checksum error\n");
 923                         skb->ip_summed = CHECKSUM_NONE;
 924                         return;
 925                 }
 926
 927                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 928         }
 929 }
 930
 931 static void ena_set_rx_hash(struct ena_ring *rx_ring,
 932                             struct ena_com_rx_ctx *ena_rx_ctx,
 933                             struct sk_buff *skb)
 934 {
 935         enum pkt_hash_types hash_type;
 936
 937         if (likely(rx_ring->netdev->features & NETIF_F_RXHASH)) {
 938                 if (likely((ena_rx_ctx->l4_proto == ENA_ETH_IO_L4_PROTO_TCP) ||
 939                            (ena_rx_ctx->l4_proto == ENA_ETH_IO_L4_PROTO_UDP)))
 940
 941                         hash_type = PKT_HASH_TYPE_L4;
 942                 else
 943                         hash_type = PKT_HASH_TYPE_NONE;
 944
 945                 /* Override hash type if the packet is fragmented */
 946                 if (ena_rx_ctx->frag)
 947                         hash_type = PKT_HASH_TYPE_NONE;
 948
 949                 skb_set_hash(skb, ena_rx_ctx->hash, hash_type);
 950         }
 951 }
 952
 953 /* ena_clean_rx_irq - Cleanup RX irq
 954  * @rx_ring: RX ring to clean
 955  * @napi: napi handler
 956  * @budget: how many packets driver is allowed to clean
 957  *
 958  * Returns the number of cleaned buffers.
 959  */
 960 static int ena_clean_rx_irq(struct ena_ring *rx_ring, struct napi_struct *napi,
 961                             u32 budget)
 962 {
 963         u16 next_to_clean = rx_ring->next_to_clean;
 964         u32 res_budget, work_done;
 965
 966         struct ena_com_rx_ctx ena_rx_ctx;
 967         struct ena_adapter *adapter;
 968         struct sk_buff *skb;
 969         int refill_required;
 970         int refill_threshold;
 971         int rc = 0;
 972         int total_len = 0;
 973         int rx_copybreak_pkt = 0;
 974
 975         netif_dbg(rx_ring->adapter, rx_status, rx_ring->netdev,
 976                   "%s qid %d\n", __func__, rx_ring->qid);
 977         res_budget = budget;
 978
 979         do {
 980                 ena_rx_ctx.ena_bufs = rx_ring->ena_bufs;
 981                 ena_rx_ctx.max_bufs = rx_ring->sgl_size;
 982                 ena_rx_ctx.descs = 0;
 983                 rc = ena_com_rx_pkt(rx_ring->ena_com_io_cq,
 984                                     rx_ring->ena_com_io_sq,
 985                                     &ena_rx_ctx);
 986                 if (unlikely(rc))
 987                         goto error;
 988
 989                 if (unlikely(ena_rx_ctx.descs == 0))
 990                         break;
 991
 992                 netif_dbg(rx_ring->adapter, rx_status, rx_ring->netdev,
 993                           "rx_poll: q %d got packet from ena. descs #: %d l3 proto %d l4 proto %d hash: %x\n",
 994                           rx_ring->qid, ena_rx_ctx.descs, ena_rx_ctx.l3_proto,
 995                           ena_rx_ctx.l4_proto, ena_rx_ctx.hash);
 996
 997                 /* allocate skb and fill it */
 998                 skb = ena_rx_skb(rx_ring, rx_ring->ena_bufs, ena_rx_ctx.descs,
 999                                  &next_to_clean);
1000
1001                 /* exit if we failed to retrieve a buffer */
1002                 if (unlikely(!skb)) {
1003                         next_to_clean = ENA_RX_RING_IDX_ADD(next_to_clean,
1004                                                             ena_rx_ctx.descs,
1005                                                             rx_ring->ring_size);
1006                         break;
1007                 }
1008
1009                 ena_rx_checksum(rx_ring, &ena_rx_ctx, skb);
1010
1011                 ena_set_rx_hash(rx_ring, &ena_rx_ctx, skb);
1012
1013                 skb_record_rx_queue(skb, rx_ring->qid);
1014
1015                 if (rx_ring->ena_bufs[0].len <= rx_ring->rx_copybreak) {
1016                         total_len += rx_ring->ena_bufs[0].len;
1017                         rx_copybreak_pkt++;
1018                         napi_gro_receive(napi, skb);
1019                 } else {
1020                         total_len += skb->len;
1021                         napi_gro_frags(napi);
1022                 }
1023
1024                 res_budget--;
1025         } while (likely(res_budget));
1026
1027         work_done = budget - res_budget;
1028         rx_ring->per_napi_bytes += total_len;
1029         rx_ring->per_napi_packets += work_done;
1030         u64_stats_update_begin(&rx_ring->syncp);
1031         rx_ring->rx_stats.bytes += total_len;
1032         rx_ring->rx_stats.cnt += work_done;
1033         rx_ring->rx_stats.rx_copybreak_pkt += rx_copybreak_pkt;
1034         u64_stats_update_end(&rx_ring->syncp);
1035
1036         rx_ring->next_to_clean = next_to_clean;
1037
1038         refill_required = ena_com_sq_empty_space(rx_ring->ena_com_io_sq);
1039         refill_threshold = rx_ring->ring_size / ENA_RX_REFILL_THRESH_DIVIDER;
1040
1041         /* Optimization, try to batch new rx buffers */
1042         if (refill_required > refill_threshold) {
1043                 ena_com_update_dev_comp_head(rx_ring->ena_com_io_cq);
1044                 ena_refill_rx_bufs(rx_ring, refill_required);
1045         }
1046
1047         return work_done;
1048
1049 error:
1050         adapter = netdev_priv(rx_ring->netdev);
1051
1052         u64_stats_update_begin(&rx_ring->syncp);
1053         rx_ring->rx_stats.bad_desc_num++;
1054         u64_stats_update_end(&rx_ring->syncp);
1055
1056         /* Too many desc from the device. Trigger reset */
1057         set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
1058
1059         return 0;
1060 }
1061
1062 inline void ena_adjust_intr_moderation(struct ena_ring *rx_ring,
1063                                        struct ena_ring *tx_ring)
1064 {
1065         /* We apply adaptive moderation on Rx path only.
1066          * Tx uses static interrupt moderation.
1067          */
1068         ena_com_calculate_interrupt_delay(rx_ring->ena_dev,
1069                                           rx_ring->per_napi_packets,
1070                                           rx_ring->per_napi_bytes,
1071                                           &rx_ring->smoothed_interval,
1072                                           &rx_ring->moder_tbl_idx);
1073
1074         /* Reset per napi packets/bytes */
1075         tx_ring->per_napi_packets = 0;
1076         tx_ring->per_napi_bytes = 0;
1077         rx_ring->per_napi_packets = 0;
1078         rx_ring->per_napi_bytes = 0;
1079 }
1080
1081 static inline void ena_update_ring_numa_node(struct ena_ring *tx_ring,
1082                                              struct ena_ring *rx_ring)
1083 {
1084         int cpu = get_cpu();
1085         int numa_node;
1086
1087         /* Check only one ring since the 2 rings are running on the same cpu */
1088         if (likely(tx_ring->cpu == cpu))
1089                 goto out;
1090
1091         numa_node = cpu_to_node(cpu);
1092         put_cpu();
1093
1094         if (numa_node != NUMA_NO_NODE) {
1095                 ena_com_update_numa_node(tx_ring->ena_com_io_cq, numa_node);
1096                 ena_com_update_numa_node(rx_ring->ena_com_io_cq, numa_node);
1097         }
1098
1099         tx_ring->cpu = cpu;
1100         rx_ring->cpu = cpu;
1101
1102         return;
1103 out:
1104         put_cpu();
1105 }
1106
1107 static int ena_io_poll(struct napi_struct *napi, int budget)
1108 {
1109         struct ena_napi *ena_napi = container_of(napi, struct ena_napi, napi);
1110         struct ena_ring *tx_ring, *rx_ring;
1111         struct ena_eth_io_intr_reg intr_reg;
1112
1113         u32 tx_work_done;
1114         u32 rx_work_done;
1115         int tx_budget;
1116         int napi_comp_call = 0;
1117         int ret;
1118
1119         tx_ring = ena_napi->tx_ring;
1120         rx_ring = ena_napi->rx_ring;
1121
1122         tx_budget = tx_ring->ring_size / ENA_TX_POLL_BUDGET_DIVIDER;
1123
1124         if (!test_bit(ENA_FLAG_DEV_UP, &tx_ring->adapter->flags) ||
1125             test_bit(ENA_FLAG_TRIGGER_RESET, &tx_ring->adapter->flags)) {
1126                 napi_complete_done(napi, 0);
1127                 return 0;
1128         }
1129
1130         tx_work_done = ena_clean_tx_irq(tx_ring, tx_budget);
1131         rx_work_done = ena_clean_rx_irq(rx_ring, napi, budget);
1132
1133         /* If the device is about to reset or down, avoid unmask
1134          * the interrupt and return 0 so NAPI won't reschedule
1135          */
1136         if (unlikely(!test_bit(ENA_FLAG_DEV_UP, &tx_ring->adapter->flags) ||
1137                      test_bit(ENA_FLAG_TRIGGER_RESET, &tx_ring->adapter->flags))) {
1138                 napi_complete_done(napi, 0);
1139                 ret = 0;
1140
1141         } else if ((budget > rx_work_done) && (tx_budget > tx_work_done)) {
1142                 napi_comp_call = 1;
1143
1144                 /* Update numa and unmask the interrupt only when schedule
1145                  * from the interrupt context (vs from sk_busy_loop)
1146                  */
1147                 if (napi_complete_done(napi, rx_work_done)) {
1148                         /* Tx and Rx share the same interrupt vector */
1149                         if (ena_com_get_adaptive_moderation_enabled(rx_ring->ena_dev))
1150                                 ena_adjust_intr_moderation(rx_ring, tx_ring);
1151
1152                         /* Update intr register: rx intr delay,
1153                          * tx intr delay and interrupt unmask
1154                          */
1155                         ena_com_update_intr_reg(&intr_reg,
1156                                                 rx_ring->smoothed_interval,
1157                                                 tx_ring->smoothed_interval,
1158                                                 true);
1159
1160                         /* It is a shared MSI-X.
1161                          * Tx and Rx CQ have pointer to it.
1162                          * So we use one of them to reach the intr reg
1163                          */
1164                         ena_com_unmask_intr(rx_ring->ena_com_io_cq, &intr_reg);
1165                 }
1166
1167
1168                 ena_update_ring_numa_node(tx_ring, rx_ring);
1169
1170                 ret = rx_work_done;
1171         } else {
1172                 ret = budget;
1173         }
1174
1175         u64_stats_update_begin(&tx_ring->syncp);
1176         tx_ring->tx_stats.napi_comp += napi_comp_call;
1177         tx_ring->tx_stats.tx_poll++;
1178         u64_stats_update_end(&tx_ring->syncp);
1179
1180         return ret;
1181 }
1182
1183 static irqreturn_t ena_intr_msix_mgmnt(int irq, void *data)
1184 {
1185         struct ena_adapter *adapter = (struct ena_adapter *)data;
1186
1187         ena_com_admin_q_comp_intr_handler(adapter->ena_dev);
1188
1189         /* Don't call the aenq handler before probe is done */
1190         if (likely(test_bit(ENA_FLAG_DEVICE_RUNNING, &adapter->flags)))
1191                 ena_com_aenq_intr_handler(adapter->ena_dev, data);
1192
1193         return IRQ_HANDLED;
1194 }
1195
1196 /* ena_intr_msix_io - MSI-X Interrupt Handler for Tx/Rx
1197  * @irq: interrupt number
1198  * @data: pointer to a network interface private napi device structure
1199  */
1200 static irqreturn_t ena_intr_msix_io(int irq, void *data)
1201 {
1202         struct ena_napi *ena_napi = data;
1203
1204         napi_schedule(&ena_napi->napi);
1205
1206         return IRQ_HANDLED;
1207 }
1208
1209 static int ena_enable_msix(struct ena_adapter *adapter, int num_queues)
1210 {
1211         int msix_vecs, rc;
1212
1213         /* Reserved the max msix vectors we might need */
1214         msix_vecs = ENA_MAX_MSIX_VEC(num_queues);
1215
1216         netif_dbg(adapter, probe, adapter->netdev,
1217                   "trying to enable MSI-X, vectors %d\n", msix_vecs);
1218
1219         rc = pci_alloc_irq_vectors(adapter->pdev, msix_vecs, msix_vecs,
1220                         PCI_IRQ_MSIX);
1221         if (rc < 0) {
1222                 netif_err(adapter, probe, adapter->netdev,
1223                           "Failed to enable MSI-X, vectors %d rc %d\n",
1224                           msix_vecs, rc);
1225                 return -ENOSPC;
1226         }
1227
1228         netif_dbg(adapter, probe, adapter->netdev, "enable MSI-X, vectors %d\n",
1229                   msix_vecs);
1230
1231         if (msix_vecs >= 1) {
1232                 if (ena_init_rx_cpu_rmap(adapter))
1233                         netif_warn(adapter, probe, adapter->netdev,
1234                                    "Failed to map IRQs to CPUs\n");
1235         }
1236
1237         adapter->msix_vecs = msix_vecs;
1238
1239         return 0;
1240 }
1241
1242 static void ena_setup_mgmnt_intr(struct ena_adapter *adapter)
1243 {
1244         u32 cpu;
1245
1246         snprintf(adapter->irq_tbl[ENA_MGMNT_IRQ_IDX].name,
1247                  ENA_IRQNAME_SIZE, "ena-mgmnt@pci:%s",
1248                  pci_name(adapter->pdev));
1249         adapter->irq_tbl[ENA_MGMNT_IRQ_IDX].handler =
1250                 ena_intr_msix_mgmnt;
1251         adapter->irq_tbl[ENA_MGMNT_IRQ_IDX].data = adapter;
1252         adapter->irq_tbl[ENA_MGMNT_IRQ_IDX].vector =
1253                 pci_irq_vector(adapter->pdev, ENA_MGMNT_IRQ_IDX);
1254         cpu = cpumask_first(cpu_online_mask);
1255         adapter->irq_tbl[ENA_MGMNT_IRQ_IDX].cpu = cpu;
1256         cpumask_set_cpu(cpu,
1257                         &adapter->irq_tbl[ENA_MGMNT_IRQ_IDX].affinity_hint_mask);
1258 }
1259
1260 static void ena_setup_io_intr(struct ena_adapter *adapter)
1261 {
1262         struct net_device *netdev;
1263         int irq_idx, i, cpu;
1264
1265         netdev = adapter->netdev;
1266
1267         for (i = 0; i < adapter->num_queues; i++) {
1268                 irq_idx = ENA_IO_IRQ_IDX(i);
1269                 cpu = i % num_online_cpus();
1270
1271                 snprintf(adapter->irq_tbl[irq_idx].name, ENA_IRQNAME_SIZE,
1272                          "%s-Tx-Rx-%d", netdev->name, i);
1273                 adapter->irq_tbl[irq_idx].handler = ena_intr_msix_io;
1274                 adapter->irq_tbl[irq_idx].data = &adapter->ena_napi[i];
1275                 adapter->irq_tbl[irq_idx].vector =
1276                         pci_irq_vector(adapter->pdev, irq_idx);
1277                 adapter->irq_tbl[irq_idx].cpu = cpu;
1278
1279                 cpumask_set_cpu(cpu,
1280                                 &adapter->irq_tbl[irq_idx].affinity_hint_mask);
1281         }
1282 }
1283
1284 static int ena_request_mgmnt_irq(struct ena_adapter *adapter)
1285 {
1286         unsigned long flags = 0;
1287         struct ena_irq *irq;
1288         int rc;
1289
1290         irq = &adapter->irq_tbl[ENA_MGMNT_IRQ_IDX];
1291         rc = request_irq(irq->vector, irq->handler, flags, irq->name,
1292                          irq->data);
1293         if (rc) {
1294                 netif_err(adapter, probe, adapter->netdev,
1295                           "failed to request admin irq\n");
1296                 return rc;
1297         }
1298
1299         netif_dbg(adapter, probe, adapter->netdev,
1300                   "set affinity hint of mgmnt irq.to 0x%lx (irq vector: %d)\n",
1301                   irq->affinity_hint_mask.bits[0], irq->vector);
1302
1303         irq_set_affinity_hint(irq->vector, &irq->affinity_hint_mask);
1304
1305         return rc;
1306 }
1307
1308 static int ena_request_io_irq(struct ena_adapter *adapter)
1309 {
1310         unsigned long flags = 0;
1311         struct ena_irq *irq;
1312         int rc = 0, i, k;
1313
1314         for (i = ENA_IO_IRQ_FIRST_IDX; i < adapter->msix_vecs; i++) {
1315                 irq = &adapter->irq_tbl[i];
1316                 rc = request_irq(irq->vector, irq->handler, flags, irq->name,
1317                                  irq->data);
1318                 if (rc) {
1319                         netif_err(adapter, ifup, adapter->netdev,
1320                                   "Failed to request I/O IRQ. index %d rc %d\n",
1321                                    i, rc);
1322                         goto err;
1323                 }
1324
1325                 netif_dbg(adapter, ifup, adapter->netdev,
1326                           "set affinity hint of irq. index %d to 0x%lx (irq vector: %d)\n",
1327                           i, irq->affinity_hint_mask.bits[0], irq->vector);
1328
1329                 irq_set_affinity_hint(irq->vector, &irq->affinity_hint_mask);
1330         }
1331
1332         return rc;
1333
1334 err:
1335         for (k = ENA_IO_IRQ_FIRST_IDX; k < i; k++) {
1336                 irq = &adapter->irq_tbl[k];
1337                 free_irq(irq->vector, irq->data);
1338         }
1339
1340         return rc;
1341 }
1342
1343 static void ena_free_mgmnt_irq(struct ena_adapter *adapter)
1344 {
1345         struct ena_irq *irq;
1346
1347         irq = &adapter->irq_tbl[ENA_MGMNT_IRQ_IDX];
1348         synchronize_irq(irq->vector);
1349         irq_set_affinity_hint(irq->vector, NULL);
1350         free_irq(irq->vector, irq->data);
1351 }
1352
1353 static void ena_free_io_irq(struct ena_adapter *adapter)
1354 {
1355         struct ena_irq *irq;
1356         int i;
1357
1358 #ifdef CONFIG_RFS_ACCEL
1359         if (adapter->msix_vecs >= 1) {
1360                 free_irq_cpu_rmap(adapter->netdev->rx_cpu_rmap);
1361                 adapter->netdev->rx_cpu_rmap = NULL;
1362         }
1363 #endif /* CONFIG_RFS_ACCEL */
1364
1365         for (i = ENA_IO_IRQ_FIRST_IDX; i < adapter->msix_vecs; i++) {
1366                 irq = &adapter->irq_tbl[i];
1367                 irq_set_affinity_hint(irq->vector, NULL);
1368                 free_irq(irq->vector, irq->data);
1369         }
1370 }
1371
1372 static void ena_disable_io_intr_sync(struct ena_adapter *adapter)
1373 {
1374         int i;
1375
1376         if (!netif_running(adapter->netdev))
1377                 return;
1378
1379         for (i = ENA_IO_IRQ_FIRST_IDX; i < adapter->msix_vecs; i++)
1380                 synchronize_irq(adapter->irq_tbl[i].vector);
1381 }
1382
1383 static void ena_del_napi(struct ena_adapter *adapter)
1384 {
1385         int i;
1386
1387         for (i = 0; i < adapter->num_queues; i++)
1388                 netif_napi_del(&adapter->ena_napi[i].napi);
1389 }
1390
1391 static void ena_init_napi(struct ena_adapter *adapter)
1392 {
1393         struct ena_napi *napi;
1394         int i;
1395
1396         for (i = 0; i < adapter->num_queues; i++) {
1397                 napi = &adapter->ena_napi[i];
1398
1399                 netif_napi_add(adapter->netdev,
1400                                &adapter->ena_napi[i].napi,
1401                                ena_io_poll,
1402                                ENA_NAPI_BUDGET);
1403                 napi->rx_ring = &adapter->rx_ring[i];
1404                 napi->tx_ring = &adapter->tx_ring[i];
1405                 napi->qid = i;
1406         }
1407 }
1408
1409 static void ena_napi_disable_all(struct ena_adapter *adapter)
1410 {
1411         int i;
1412
1413         for (i = 0; i < adapter->num_queues; i++)
1414                 napi_disable(&adapter->ena_napi[i].napi);
1415 }
1416
1417 static void ena_napi_enable_all(struct ena_adapter *adapter)
1418 {
1419         int i;
1420
1421         for (i = 0; i < adapter->num_queues; i++)
1422                 napi_enable(&adapter->ena_napi[i].napi);
1423 }
1424
1425 static void ena_restore_ethtool_params(struct ena_adapter *adapter)
1426 {
1427         adapter->tx_usecs = 0;
1428         adapter->rx_usecs = 0;
1429         adapter->tx_frames = 1;
1430         adapter->rx_frames = 1;
1431 }
1432
1433 /* Configure the Rx forwarding */
1434 static int ena_rss_configure(struct ena_adapter *adapter)
1435 {
1436         struct ena_com_dev *ena_dev = adapter->ena_dev;
1437         int rc;
1438
1439         /* In case the RSS table wasn't initialized by probe */
1440         if (!ena_dev->rss.tbl_log_size) {
1441                 rc = ena_rss_init_default(adapter);
1442                 if (rc && (rc != -EPERM)) {
1443                         netif_err(adapter, ifup, adapter->netdev,
1444                                   "Failed to init RSS rc: %d\n", rc);
1445                         return rc;
1446                 }
1447         }
1448
1449         /* Set indirect table */
1450         rc = ena_com_indirect_table_set(ena_dev);
1451         if (unlikely(rc && rc != -EPERM))
1452                 return rc;
1453
1454         /* Configure hash function (if supported) */
1455         rc = ena_com_set_hash_function(ena_dev);
1456         if (unlikely(rc && (rc != -EPERM)))
1457                 return rc;
1458
1459         /* Configure hash inputs (if supported) */
1460         rc = ena_com_set_hash_ctrl(ena_dev);
1461         if (unlikely(rc && (rc != -EPERM)))
1462                 return rc;
1463
1464         return 0;
1465 }
1466
1467 static int ena_up_complete(struct ena_adapter *adapter)
1468 {
1469         int rc, i;
1470
1471         rc = ena_rss_configure(adapter);
1472         if (rc)
1473                 return rc;
1474
1475         ena_init_napi(adapter);
1476
1477         ena_change_mtu(adapter->netdev, adapter->netdev->mtu);
1478
1479         ena_refill_all_rx_bufs(adapter);
1480
1481         /* enable transmits */
1482         netif_tx_start_all_queues(adapter->netdev);
1483
1484         ena_restore_ethtool_params(adapter);
1485
1486         ena_napi_enable_all(adapter);
1487
1488         /* schedule napi in case we had pending packets
1489          * from the last time we disable napi
1490          */
1491         for (i = 0; i < adapter->num_queues; i++)
1492                 napi_schedule(&adapter->ena_napi[i].napi);
1493
1494         return 0;
1495 }
1496
1497 static int ena_create_io_tx_queue(struct ena_adapter *adapter, int qid)
1498 {
1499         struct ena_com_create_io_ctx ctx = { 0 };
1500         struct ena_com_dev *ena_dev;
1501         struct ena_ring *tx_ring;
1502         u32 msix_vector;
1503         u16 ena_qid;
1504         int rc;
1505
1506         ena_dev = adapter->ena_dev;
1507
1508         tx_ring = &adapter->tx_ring[qid];
1509         msix_vector = ENA_IO_IRQ_IDX(qid);
1510         ena_qid = ENA_IO_TXQ_IDX(qid);
1511
1512         ctx.direction = ENA_COM_IO_QUEUE_DIRECTION_TX;
1513         ctx.qid = ena_qid;
1514         ctx.mem_queue_type = ena_dev->tx_mem_queue_type;
1515         ctx.msix_vector = msix_vector;
1516         ctx.queue_size = adapter->tx_ring_size;
1517         ctx.numa_node = cpu_to_node(tx_ring->cpu);
1518
1519         rc = ena_com_create_io_queue(ena_dev, &ctx);
1520         if (rc) {
1521                 netif_err(adapter, ifup, adapter->netdev,
1522                           "Failed to create I/O TX queue num %d rc: %d\n",
1523                           qid, rc);
1524                 return rc;
1525         }
1526
1527         rc = ena_com_get_io_handlers(ena_dev, ena_qid,
1528                                      &tx_ring->ena_com_io_sq,
1529                                      &tx_ring->ena_com_io_cq);
1530         if (rc) {
1531                 netif_err(adapter, ifup, adapter->netdev,
1532                           "Failed to get TX queue handlers. TX queue num %d rc: %d\n",
1533                           qid, rc);
1534                 ena_com_destroy_io_queue(ena_dev, ena_qid);
1535         }
1536
1537         ena_com_update_numa_node(tx_ring->ena_com_io_cq, ctx.numa_node);
1538         return rc;
1539 }
1540
1541 static int ena_create_all_io_tx_queues(struct ena_adapter *adapter)
1542 {
1543         struct ena_com_dev *ena_dev = adapter->ena_dev;
1544         int rc, i;
1545
1546         for (i = 0; i < adapter->num_queues; i++) {
1547                 rc = ena_create_io_tx_queue(adapter, i);
1548                 if (rc)
1549                         goto create_err;
1550         }
1551
1552         return 0;
1553
1554 create_err:
1555         while (i--)
1556                 ena_com_destroy_io_queue(ena_dev, ENA_IO_TXQ_IDX(i));
1557
1558         return rc;
1559 }
1560
1561 static int ena_create_io_rx_queue(struct ena_adapter *adapter, int qid)
1562 {
1563         struct ena_com_dev *ena_dev;
1564         struct ena_com_create_io_ctx ctx = { 0 };
1565         struct ena_ring *rx_ring;
1566         u32 msix_vector;
1567         u16 ena_qid;
1568         int rc;
1569
1570         ena_dev = adapter->ena_dev;
1571
1572         rx_ring = &adapter->rx_ring[qid];
1573         msix_vector = ENA_IO_IRQ_IDX(qid);
1574         ena_qid = ENA_IO_RXQ_IDX(qid);
1575
1576         ctx.qid = ena_qid;
1577         ctx.direction = ENA_COM_IO_QUEUE_DIRECTION_RX;
1578         ctx.mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST;
1579         ctx.msix_vector = msix_vector;
1580         ctx.queue_size = adapter->rx_ring_size;
1581         ctx.numa_node = cpu_to_node(rx_ring->cpu);
1582
1583         rc = ena_com_create_io_queue(ena_dev, &ctx);
1584         if (rc) {
1585                 netif_err(adapter, ifup, adapter->netdev,
1586                           "Failed to create I/O RX queue num %d rc: %d\n",
1587                           qid, rc);
1588                 return rc;
1589         }
1590
1591         rc = ena_com_get_io_handlers(ena_dev, ena_qid,
1592                                      &rx_ring->ena_com_io_sq,
1593                                      &rx_ring->ena_com_io_cq);
1594         if (rc) {
1595                 netif_err(adapter, ifup, adapter->netdev,
1596                           "Failed to get RX queue handlers. RX queue num %d rc: %d\n",
1597                           qid, rc);
1598                 ena_com_destroy_io_queue(ena_dev, ena_qid);
1599         }
1600
1601         ena_com_update_numa_node(rx_ring->ena_com_io_cq, ctx.numa_node);
1602
1603         return rc;
1604 }
1605
1606 static int ena_create_all_io_rx_queues(struct ena_adapter *adapter)
1607 {
1608         struct ena_com_dev *ena_dev = adapter->ena_dev;
1609         int rc, i;
1610
1611         for (i = 0; i < adapter->num_queues; i++) {
1612                 rc = ena_create_io_rx_queue(adapter, i);
1613                 if (rc)
1614                         goto create_err;
1615         }
1616
1617         return 0;
1618
1619 create_err:
1620         while (i--)
1621                 ena_com_destroy_io_queue(ena_dev, ENA_IO_RXQ_IDX(i));
1622
1623         return rc;
1624 }
1625
1626 static int ena_up(struct ena_adapter *adapter)
1627 {
1628         int rc;
1629
1630         netdev_dbg(adapter->netdev, "%s\n", __func__);
1631
1632         ena_setup_io_intr(adapter);
1633
1634         rc = ena_request_io_irq(adapter);
1635         if (rc)
1636                 goto err_req_irq;
1637
1638         /* allocate transmit descriptors */
1639         rc = ena_setup_all_tx_resources(adapter);
1640         if (rc)
1641                 goto err_setup_tx;
1642
1643         /* allocate receive descriptors */
1644         rc = ena_setup_all_rx_resources(adapter);
1645         if (rc)
1646                 goto err_setup_rx;
1647
1648         /* Create TX queues */
1649         rc = ena_create_all_io_tx_queues(adapter);
1650         if (rc)
1651                 goto err_create_tx_queues;
1652
1653         /* Create RX queues */
1654         rc = ena_create_all_io_rx_queues(adapter);
1655         if (rc)
1656                 goto err_create_rx_queues;
1657
1658         rc = ena_up_complete(adapter);
1659         if (rc)
1660                 goto err_up;
1661
1662         if (test_bit(ENA_FLAG_LINK_UP, &adapter->flags))
1663                 netif_carrier_on(adapter->netdev);
1664
1665         u64_stats_update_begin(&adapter->syncp);
1666         adapter->dev_stats.interface_up++;
1667         u64_stats_update_end(&adapter->syncp);
1668
1669         set_bit(ENA_FLAG_DEV_UP, &adapter->flags);
1670
1671         return rc;
1672
1673 err_up:
1674         ena_destroy_all_rx_queues(adapter);
1675 err_create_rx_queues:
1676         ena_destroy_all_tx_queues(adapter);
1677 err_create_tx_queues:
1678         ena_free_all_io_rx_resources(adapter);
1679 err_setup_rx:
1680         ena_free_all_io_tx_resources(adapter);
1681 err_setup_tx:
1682         ena_free_io_irq(adapter);
1683 err_req_irq:
1684
1685         return rc;
1686 }
1687
1688 static void ena_down(struct ena_adapter *adapter)
1689 {
1690         netif_info(adapter, ifdown, adapter->netdev, "%s\n", __func__);
1691
1692         clear_bit(ENA_FLAG_DEV_UP, &adapter->flags);
1693
1694         u64_stats_update_begin(&adapter->syncp);
1695         adapter->dev_stats.interface_down++;
1696         u64_stats_update_end(&adapter->syncp);
1697
1698         netif_carrier_off(adapter->netdev);
1699         netif_tx_disable(adapter->netdev);
1700
1701         /* After this point the napi handler won't enable the tx queue */
1702         ena_napi_disable_all(adapter);
1703
1704         /* After destroy the queue there won't be any new interrupts */
1705
1706         if (test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags)) {
1707                 int rc;
1708
1709                 rc = ena_com_dev_reset(adapter->ena_dev);
1710                 if (rc)
1711                         dev_err(&adapter->pdev->dev, "Device reset failed\n");
1712         }
1713
1714         ena_destroy_all_io_queues(adapter);
1715
1716         ena_disable_io_intr_sync(adapter);
1717         ena_free_io_irq(adapter);
1718         ena_del_napi(adapter);
1719
1720         ena_free_all_tx_bufs(adapter);
1721         ena_free_all_rx_bufs(adapter);
1722         ena_free_all_io_tx_resources(adapter);
1723         ena_free_all_io_rx_resources(adapter);
1724 }
1725
1726 /* ena_open - Called when a network interface is made active
1727  * @netdev: network interface device structure
1728  *
1729  * Returns 0 on success, negative value on failure
1730  *
1731  * The open entry point is called when a network interface is made
1732  * active by the system (IFF_UP).  At this point all resources needed
1733  * for transmit and receive operations are allocated, the interrupt
1734  * handler is registered with the OS, the watchdog timer is started,
1735  * and the stack is notified that the interface is ready.
1736  */
1737 static int ena_open(struct net_device *netdev)
1738 {
1739         struct ena_adapter *adapter = netdev_priv(netdev);
1740         int rc;
1741
1742         /* Notify the stack of the actual queue counts. */
1743         rc = netif_set_real_num_tx_queues(netdev, adapter->num_queues);
1744         if (rc) {
1745                 netif_err(adapter, ifup, netdev, "Can't set num tx queues\n");
1746                 return rc;
1747         }
1748
1749         rc = netif_set_real_num_rx_queues(netdev, adapter->num_queues);
1750         if (rc) {
1751                 netif_err(adapter, ifup, netdev, "Can't set num rx queues\n");
1752                 return rc;
1753         }
1754
1755         rc = ena_up(adapter);
1756         if (rc)
1757                 return rc;
1758
1759         return rc;
1760 }
1761
1762 /* ena_close - Disables a network interface
1763  * @netdev: network interface device structure
1764  *
1765  * Returns 0, this is not allowed to fail
1766  *
1767  * The close entry point is called when an interface is de-activated
1768  * by the OS.  The hardware is still under the drivers control, but
1769  * needs to be disabled.  A global MAC reset is issued to stop the
1770  * hardware, and all transmit and receive resources are freed.
1771  */
1772 static int ena_close(struct net_device *netdev)
1773 {
1774         struct ena_adapter *adapter = netdev_priv(netdev);
1775
1776         netif_dbg(adapter, ifdown, netdev, "%s\n", __func__);
1777
1778         if (test_bit(ENA_FLAG_DEV_UP, &adapter->flags))
1779                 ena_down(adapter);
1780
1781         return 0;
1782 }
1783
1784 static void ena_tx_csum(struct ena_com_tx_ctx *ena_tx_ctx, struct sk_buff *skb)
1785 {
1786         u32 mss = skb_shinfo(skb)->gso_size;
1787         struct ena_com_tx_meta *ena_meta = &ena_tx_ctx->ena_meta;
1788         u8 l4_protocol = 0;
1789
1790         if ((skb->ip_summed == CHECKSUM_PARTIAL) || mss) {
1791                 ena_tx_ctx->l4_csum_enable = 1;
1792                 if (mss) {
1793                         ena_tx_ctx->tso_enable = 1;
1794                         ena_meta->l4_hdr_len = tcp_hdr(skb)->doff;
1795                         ena_tx_ctx->l4_csum_partial = 0;
1796                 } else {
1797                         ena_tx_ctx->tso_enable = 0;
1798                         ena_meta->l4_hdr_len = 0;
1799                         ena_tx_ctx->l4_csum_partial = 1;
1800                 }
1801
1802                 switch (ip_hdr(skb)->version) {
1803                 case IPVERSION:
1804                         ena_tx_ctx->l3_proto = ENA_ETH_IO_L3_PROTO_IPV4;
1805                         if (ip_hdr(skb)->frag_off & htons(IP_DF))
1806                                 ena_tx_ctx->df = 1;
1807                         if (mss)
1808                                 ena_tx_ctx->l3_csum_enable = 1;
1809                         l4_protocol = ip_hdr(skb)->protocol;
1810                         break;
1811                 case 6:
1812                         ena_tx_ctx->l3_proto = ENA_ETH_IO_L3_PROTO_IPV6;
1813                         l4_protocol = ipv6_hdr(skb)->nexthdr;
1814                         break;
1815                 default:
1816                         break;
1817                 }
1818
1819                 if (l4_protocol == IPPROTO_TCP)
1820                         ena_tx_ctx->l4_proto = ENA_ETH_IO_L4_PROTO_TCP;
1821                 else
1822                         ena_tx_ctx->l4_proto = ENA_ETH_IO_L4_PROTO_UDP;
1823
1824                 ena_meta->mss = mss;
1825                 ena_meta->l3_hdr_len = skb_network_header_len(skb);
1826                 ena_meta->l3_hdr_offset = skb_network_offset(skb);
1827                 ena_tx_ctx->meta_valid = 1;
1828
1829         } else {
1830                 ena_tx_ctx->meta_valid = 0;
1831         }
1832 }
1833
1834 static int ena_check_and_linearize_skb(struct ena_ring *tx_ring,
1835                                        struct sk_buff *skb)
1836 {
1837         int num_frags, header_len, rc;
1838
1839         num_frags = skb_shinfo(skb)->nr_frags;
1840         header_len = skb_headlen(skb);
1841
1842         if (num_frags < tx_ring->sgl_size)
1843                 return 0;
1844
1845         if ((num_frags == tx_ring->sgl_size) &&
1846             (header_len < tx_ring->tx_max_header_size))
1847                 return 0;
1848
1849         u64_stats_update_begin(&tx_ring->syncp);
1850         tx_ring->tx_stats.linearize++;
1851         u64_stats_update_end(&tx_ring->syncp);
1852
1853         rc = skb_linearize(skb);
1854         if (unlikely(rc)) {
1855                 u64_stats_update_begin(&tx_ring->syncp);
1856                 tx_ring->tx_stats.linearize_failed++;
1857                 u64_stats_update_end(&tx_ring->syncp);
1858         }
1859
1860         return rc;
1861 }
1862
1863 /* Called with netif_tx_lock. */
1864 static netdev_tx_t ena_start_xmit(struct sk_buff *skb, struct net_device *dev)
1865 {
1866         struct ena_adapter *adapter = netdev_priv(dev);
1867         struct ena_tx_buffer *tx_info;
1868         struct ena_com_tx_ctx ena_tx_ctx;
1869         struct ena_ring *tx_ring;
1870         struct netdev_queue *txq;
1871         struct ena_com_buf *ena_buf;
1872         void *push_hdr;
1873         u32 len, last_frag;
1874         u16 next_to_use;
1875         u16 req_id;
1876         u16 push_len;
1877         u16 header_len;
1878         dma_addr_t dma;
1879         int qid, rc, nb_hw_desc;
1880         int i = -1;
1881
1882         netif_dbg(adapter, tx_queued, dev, "%s skb %p\n", __func__, skb);
1883         /*  Determine which tx ring we will be placed on */
1884         qid = skb_get_queue_mapping(skb);
1885         tx_ring = &adapter->tx_ring[qid];
1886         txq = netdev_get_tx_queue(dev, qid);
1887
1888         rc = ena_check_and_linearize_skb(tx_ring, skb);
1889         if (unlikely(rc))
1890                 goto error_drop_packet;
1891
1892         skb_tx_timestamp(skb);
1893         len = skb_headlen(skb);
1894
1895         next_to_use = tx_ring->next_to_use;
1896         req_id = tx_ring->free_tx_ids[next_to_use];
1897         tx_info = &tx_ring->tx_buffer_info[req_id];
1898         tx_info->num_of_bufs = 0;
1899
1900         WARN(tx_info->skb, "SKB isn't NULL req_id %d\n", req_id);
1901         ena_buf = tx_info->bufs;
1902         tx_info->skb = skb;
1903
1904         if (tx_ring->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) {
1905                 /* prepared the push buffer */
1906                 push_len = min_t(u32, len, tx_ring->tx_max_header_size);
1907                 header_len = push_len;
1908                 push_hdr = skb->data;
1909         } else {
1910                 push_len = 0;
1911                 header_len = min_t(u32, len, tx_ring->tx_max_header_size);
1912                 push_hdr = NULL;
1913         }
1914
1915         netif_dbg(adapter, tx_queued, dev,
1916                   "skb: %p header_buf->vaddr: %p push_len: %d\n", skb,
1917                   push_hdr, push_len);
1918
1919         if (len > push_len) {
1920                 dma = dma_map_single(tx_ring->dev, skb->data + push_len,
1921                                      len - push_len, DMA_TO_DEVICE);
1922                 if (dma_mapping_error(tx_ring->dev, dma))
1923                         goto error_report_dma_error;
1924
1925                 ena_buf->paddr = dma;
1926                 ena_buf->len = len - push_len;
1927
1928                 ena_buf++;
1929                 tx_info->num_of_bufs++;
1930         }
1931
1932         last_frag = skb_shinfo(skb)->nr_frags;
1933
1934         for (i = 0; i < last_frag; i++) {
1935                 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
1936
1937                 len = skb_frag_size(frag);
1938                 dma = skb_frag_dma_map(tx_ring->dev, frag, 0, len,
1939                                        DMA_TO_DEVICE);
1940                 if (dma_mapping_error(tx_ring->dev, dma))
1941                         goto error_report_dma_error;
1942
1943                 ena_buf->paddr = dma;
1944                 ena_buf->len = len;
1945                 ena_buf++;
1946         }
1947
1948         tx_info->num_of_bufs += last_frag;
1949
1950         memset(&ena_tx_ctx, 0x0, sizeof(struct ena_com_tx_ctx));
1951         ena_tx_ctx.ena_bufs = tx_info->bufs;
1952         ena_tx_ctx.push_header = push_hdr;
1953         ena_tx_ctx.num_bufs = tx_info->num_of_bufs;
1954         ena_tx_ctx.req_id = req_id;
1955         ena_tx_ctx.header_len = header_len;
1956
1957         /* set flags and meta data */
1958         ena_tx_csum(&ena_tx_ctx, skb);
1959
1960         /* prepare the packet's descriptors to dma engine */
1961         rc = ena_com_prepare_tx(tx_ring->ena_com_io_sq, &ena_tx_ctx,
1962                                 &nb_hw_desc);
1963
1964         if (unlikely(rc)) {
1965                 netif_err(adapter, tx_queued, dev,
1966                           "failed to prepare tx bufs\n");
1967                 u64_stats_update_begin(&tx_ring->syncp);
1968                 tx_ring->tx_stats.queue_stop++;
1969                 tx_ring->tx_stats.prepare_ctx_err++;
1970                 u64_stats_update_end(&tx_ring->syncp);
1971                 netif_tx_stop_queue(txq);
1972                 goto error_unmap_dma;
1973         }
1974
1975         netdev_tx_sent_queue(txq, skb->len);
1976
1977         u64_stats_update_begin(&tx_ring->syncp);
1978         tx_ring->tx_stats.cnt++;
1979         tx_ring->tx_stats.bytes += skb->len;
1980         u64_stats_update_end(&tx_ring->syncp);
1981
1982         tx_info->tx_descs = nb_hw_desc;
1983         tx_info->last_jiffies = jiffies;
1984
1985         tx_ring->next_to_use = ENA_TX_RING_IDX_NEXT(next_to_use,
1986                 tx_ring->ring_size);
1987
1988         /* This WMB is aimed to:
1989          * 1 - perform smp barrier before reading next_to_completion
1990          * 2 - make sure the desc were written before trigger DB
1991          */
1992         wmb();
1993
1994         /* stop the queue when no more space available, the packet can have up
1995          * to sgl_size + 2. one for the meta descriptor and one for header
1996          * (if the header is larger than tx_max_header_size).
1997          */
1998         if (unlikely(ena_com_sq_empty_space(tx_ring->ena_com_io_sq) <
1999                      (tx_ring->sgl_size + 2))) {
2000                 netif_dbg(adapter, tx_queued, dev, "%s stop queue %d\n",
2001                           __func__, qid);
2002
2003                 netif_tx_stop_queue(txq);
2004                 u64_stats_update_begin(&tx_ring->syncp);
2005                 tx_ring->tx_stats.queue_stop++;
2006                 u64_stats_update_end(&tx_ring->syncp);
2007
2008                 /* There is a rare condition where this function decide to
2009                  * stop the queue but meanwhile clean_tx_irq updates
2010                  * next_to_completion and terminates.
2011                  * The queue will remain stopped forever.
2012                  * To solve this issue this function perform rmb, check
2013                  * the wakeup condition and wake up the queue if needed.
2014                  */
2015                 smp_rmb();
2016
2017                 if (ena_com_sq_empty_space(tx_ring->ena_com_io_sq)
2018                                 > ENA_TX_WAKEUP_THRESH) {
2019                         netif_tx_wake_queue(txq);
2020                         u64_stats_update_begin(&tx_ring->syncp);
2021                         tx_ring->tx_stats.queue_wakeup++;
2022                         u64_stats_update_end(&tx_ring->syncp);
2023                 }
2024         }
2025
2026         if (netif_xmit_stopped(txq) || !skb->xmit_more) {
2027                 /* trigger the dma engine */
2028                 ena_com_write_sq_doorbell(tx_ring->ena_com_io_sq);
2029                 u64_stats_update_begin(&tx_ring->syncp);
2030                 tx_ring->tx_stats.doorbells++;
2031                 u64_stats_update_end(&tx_ring->syncp);
2032         }
2033
2034         return NETDEV_TX_OK;
2035
2036 error_report_dma_error:
2037         u64_stats_update_begin(&tx_ring->syncp);
2038         tx_ring->tx_stats.dma_mapping_err++;
2039         u64_stats_update_end(&tx_ring->syncp);
2040         netdev_warn(adapter->netdev, "failed to map skb\n");
2041
2042         tx_info->skb = NULL;
2043
2044 error_unmap_dma:
2045         if (i >= 0) {
2046                 /* save value of frag that failed */
2047                 last_frag = i;
2048
2049                 /* start back at beginning and unmap skb */
2050                 tx_info->skb = NULL;
2051                 ena_buf = tx_info->bufs;
2052                 dma_unmap_single(tx_ring->dev, dma_unmap_addr(ena_buf, paddr),
2053                                  dma_unmap_len(ena_buf, len), DMA_TO_DEVICE);
2054
2055                 /* unmap remaining mapped pages */
2056                 for (i = 0; i < last_frag; i++) {
2057                         ena_buf++;
2058                         dma_unmap_page(tx_ring->dev, dma_unmap_addr(ena_buf, paddr),
2059                                        dma_unmap_len(ena_buf, len), DMA_TO_DEVICE);
2060                 }
2061         }
2062
2063 error_drop_packet:
2064
2065         dev_kfree_skb(skb);
2066         return NETDEV_TX_OK;
2067 }
2068
2069 #ifdef CONFIG_NET_POLL_CONTROLLER
2070 static void ena_netpoll(struct net_device *netdev)
2071 {
2072         struct ena_adapter *adapter = netdev_priv(netdev);
2073         int i;
2074
2075         /* Dont schedule NAPI if the driver is in the middle of reset
2076          * or netdev is down.
2077          */
2078
2079         if (!test_bit(ENA_FLAG_DEV_UP, &adapter->flags) ||
2080             test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags))
2081                 return;
2082
2083         for (i = 0; i < adapter->num_queues; i++)
2084                 napi_schedule(&adapter->ena_napi[i].napi);
2085 }
2086 #endif /* CONFIG_NET_POLL_CONTROLLER */
2087
2088 static u16 ena_select_queue(struct net_device *dev, struct sk_buff *skb,
2089                             void *accel_priv, select_queue_fallback_t fallback)
2090 {
2091         u16 qid;
2092         /* we suspect that this is good for in--kernel network services that
2093          * want to loop incoming skb rx to tx in normal user generated traffic,
2094          * most probably we will not get to this
2095          */
2096         if (skb_rx_queue_recorded(skb))
2097                 qid = skb_get_rx_queue(skb);
2098         else
2099                 qid = fallback(dev, skb);
2100
2101         return qid;
2102 }
2103
2104 static void ena_config_host_info(struct ena_com_dev *ena_dev)
2105 {
2106         struct ena_admin_host_info *host_info;
2107         int rc;
2108
2109         /* Allocate only the host info */
2110         rc = ena_com_allocate_host_info(ena_dev);
2111         if (rc) {
2112                 pr_err("Cannot allocate host info\n");
2113                 return;
2114         }
2115
2116         host_info = ena_dev->host_attr.host_info;
2117
2118         host_info->os_type = ENA_ADMIN_OS_LINUX;
2119         host_info->kernel_ver = LINUX_VERSION_CODE;
2120         strncpy(host_info->kernel_ver_str, utsname()->version,
2121                 sizeof(host_info->kernel_ver_str) - 1);
2122         host_info->os_dist = 0;
2123         strncpy(host_info->os_dist_str, utsname()->release,
2124                 sizeof(host_info->os_dist_str) - 1);
2125         host_info->driver_version =
2126                 (DRV_MODULE_VER_MAJOR) |
2127                 (DRV_MODULE_VER_MINOR << ENA_ADMIN_HOST_INFO_MINOR_SHIFT) |
2128                 (DRV_MODULE_VER_SUBMINOR << ENA_ADMIN_HOST_INFO_SUB_MINOR_SHIFT);
2129
2130         rc = ena_com_set_host_attributes(ena_dev);
2131         if (rc) {
2132                 if (rc == -EPERM)
2133                         pr_warn("Cannot set host attributes\n");
2134                 else
2135                         pr_err("Cannot set host attributes\n");
2136
2137                 goto err;
2138         }
2139
2140         return;
2141
2142 err:
2143         ena_com_delete_host_info(ena_dev);
2144 }
2145
2146 static void ena_config_debug_area(struct ena_adapter *adapter)
2147 {
2148         u32 debug_area_size;
2149         int rc, ss_count;
2150
2151         ss_count = ena_get_sset_count(adapter->netdev, ETH_SS_STATS);
2152         if (ss_count <= 0) {
2153                 netif_err(adapter, drv, adapter->netdev,
2154                           "SS count is negative\n");
2155                 return;
2156         }
2157
2158         /* allocate 32 bytes for each string and 64bit for the value */
2159         debug_area_size = ss_count * ETH_GSTRING_LEN + sizeof(u64) * ss_count;
2160
2161         rc = ena_com_allocate_debug_area(adapter->ena_dev, debug_area_size);
2162         if (rc) {
2163                 pr_err("Cannot allocate debug area\n");
2164                 return;
2165         }
2166
2167         rc = ena_com_set_host_attributes(adapter->ena_dev);
2168         if (rc) {
2169                 if (rc == -EPERM)
2170                         netif_warn(adapter, drv, adapter->netdev,
2171                                    "Cannot set host attributes\n");
2172                 else
2173                         netif_err(adapter, drv, adapter->netdev,
2174                                   "Cannot set host attributes\n");
2175                 goto err;
2176         }
2177
2178         return;
2179 err:
2180         ena_com_delete_debug_area(adapter->ena_dev);
2181 }
2182
2183 static void ena_get_stats64(struct net_device *netdev,
2184                             struct rtnl_link_stats64 *stats)
2185 {
2186         struct ena_adapter *adapter = netdev_priv(netdev);
2187         struct ena_ring *rx_ring, *tx_ring;
2188         unsigned int start;
2189         u64 rx_drops;
2190         int i;
2191
2192         if (!test_bit(ENA_FLAG_DEV_UP, &adapter->flags))
2193                 return;
2194
2195         for (i = 0; i < adapter->num_queues; i++) {
2196                 u64 bytes, packets;
2197
2198                 tx_ring = &adapter->tx_ring[i];
2199
2200                 do {
2201                         start = u64_stats_fetch_begin_irq(&tx_ring->syncp);
2202                         packets = tx_ring->tx_stats.cnt;
2203                         bytes = tx_ring->tx_stats.bytes;
2204                 } while (u64_stats_fetch_retry_irq(&tx_ring->syncp, start));
2205
2206                 stats->tx_packets += packets;
2207                 stats->tx_bytes += bytes;
2208
2209                 rx_ring = &adapter->rx_ring[i];
2210
2211                 do {
2212                         start = u64_stats_fetch_begin_irq(&rx_ring->syncp);
2213                         packets = rx_ring->rx_stats.cnt;
2214                         bytes = rx_ring->rx_stats.bytes;
2215                 } while (u64_stats_fetch_retry_irq(&rx_ring->syncp, start));
2216
2217                 stats->rx_packets += packets;
2218                 stats->rx_bytes += bytes;
2219         }
2220
2221         do {
2222                 start = u64_stats_fetch_begin_irq(&adapter->syncp);
2223                 rx_drops = adapter->dev_stats.rx_drops;
2224         } while (u64_stats_fetch_retry_irq(&adapter->syncp, start));
2225
2226         stats->rx_dropped = rx_drops;
2227
2228         stats->multicast = 0;
2229         stats->collisions = 0;
2230
2231         stats->rx_length_errors = 0;
2232         stats->rx_crc_errors = 0;
2233         stats->rx_frame_errors = 0;
2234         stats->rx_fifo_errors = 0;
2235         stats->rx_missed_errors = 0;
2236         stats->tx_window_errors = 0;
2237
2238         stats->rx_errors = 0;
2239         stats->tx_errors = 0;
2240 }
2241
2242 static const struct net_device_ops ena_netdev_ops = {
2243         .ndo_open               = ena_open,
2244         .ndo_stop               = ena_close,
2245         .ndo_start_xmit         = ena_start_xmit,
2246         .ndo_select_queue       = ena_select_queue,
2247         .ndo_get_stats64        = ena_get_stats64,
2248         .ndo_tx_timeout         = ena_tx_timeout,
2249         .ndo_change_mtu         = ena_change_mtu,
2250         .ndo_set_mac_address    = NULL,
2251         .ndo_validate_addr      = eth_validate_addr,
2252 #ifdef CONFIG_NET_POLL_CONTROLLER
2253         .ndo_poll_controller    = ena_netpoll,
2254 #endif /* CONFIG_NET_POLL_CONTROLLER */
2255 };
2256
2257 static void ena_device_io_suspend(struct work_struct *work)
2258 {
2259         struct ena_adapter *adapter =
2260                 container_of(work, struct ena_adapter, suspend_io_task);
2261         struct net_device *netdev = adapter->netdev;
2262
2263         /* ena_napi_disable_all disables only the IO handling.
2264          * We are still subject to AENQ keep alive watchdog.
2265          */
2266         u64_stats_update_begin(&adapter->syncp);
2267         adapter->dev_stats.io_suspend++;
2268         u64_stats_update_begin(&adapter->syncp);
2269         ena_napi_disable_all(adapter);
2270         netif_tx_lock(netdev);
2271         netif_device_detach(netdev);
2272         netif_tx_unlock(netdev);
2273 }
2274
2275 static void ena_device_io_resume(struct work_struct *work)
2276 {
2277         struct ena_adapter *adapter =
2278                 container_of(work, struct ena_adapter, resume_io_task);
2279         struct net_device *netdev = adapter->netdev;
2280
2281         u64_stats_update_begin(&adapter->syncp);
2282         adapter->dev_stats.io_resume++;
2283         u64_stats_update_end(&adapter->syncp);
2284
2285         netif_device_attach(netdev);
2286         ena_napi_enable_all(adapter);
2287 }
2288
2289 static int ena_device_validate_params(struct ena_adapter *adapter,
2290                                       struct ena_com_dev_get_features_ctx *get_feat_ctx)
2291 {
2292         struct net_device *netdev = adapter->netdev;
2293         int rc;
2294
2295         rc = ether_addr_equal(get_feat_ctx->dev_attr.mac_addr,
2296                               adapter->mac_addr);
2297         if (!rc) {
2298                 netif_err(adapter, drv, netdev,
2299                           "Error, mac address are different\n");
2300                 return -EINVAL;
2301         }
2302
2303         if ((get_feat_ctx->max_queues.max_cq_num < adapter->num_queues) ||
2304             (get_feat_ctx->max_queues.max_sq_num < adapter->num_queues)) {
2305                 netif_err(adapter, drv, netdev,
2306                           "Error, device doesn't support enough queues\n");
2307                 return -EINVAL;
2308         }
2309
2310         if (get_feat_ctx->dev_attr.max_mtu < netdev->mtu) {
2311                 netif_err(adapter, drv, netdev,
2312                           "Error, device max mtu is smaller than netdev MTU\n");
2313                 return -EINVAL;
2314         }
2315
2316         return 0;
2317 }
2318
2319 static int ena_device_init(struct ena_com_dev *ena_dev, struct pci_dev *pdev,
2320                            struct ena_com_dev_get_features_ctx *get_feat_ctx,
2321                            bool *wd_state)
2322 {
2323         struct device *dev = &pdev->dev;
2324         bool readless_supported;
2325         u32 aenq_groups;
2326         int dma_width;
2327         int rc;
2328
2329         rc = ena_com_mmio_reg_read_request_init(ena_dev);
2330         if (rc) {
2331                 dev_err(dev, "failed to init mmio read less\n");
2332                 return rc;
2333         }
2334
2335         /* The PCIe configuration space revision id indicate if mmio reg
2336          * read is disabled
2337          */
2338         readless_supported = !(pdev->revision & ENA_MMIO_DISABLE_REG_READ);
2339         ena_com_set_mmio_read_mode(ena_dev, readless_supported);
2340
2341         rc = ena_com_dev_reset(ena_dev);
2342         if (rc) {
2343                 dev_err(dev, "Can not reset device\n");
2344                 goto err_mmio_read_less;
2345         }
2346
2347         rc = ena_com_validate_version(ena_dev);
2348         if (rc) {
2349                 dev_err(dev, "device version is too low\n");
2350                 goto err_mmio_read_less;
2351         }
2352
2353         dma_width = ena_com_get_dma_width(ena_dev);
2354         if (dma_width < 0) {
2355                 dev_err(dev, "Invalid dma width value %d", dma_width);
2356                 rc = dma_width;
2357                 goto err_mmio_read_less;
2358         }
2359
2360         rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(dma_width));
2361         if (rc) {
2362                 dev_err(dev, "pci_set_dma_mask failed 0x%x\n", rc);
2363                 goto err_mmio_read_less;
2364         }
2365
2366         rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(dma_width));
2367         if (rc) {
2368                 dev_err(dev, "err_pci_set_consistent_dma_mask failed 0x%x\n",
2369                         rc);
2370                 goto err_mmio_read_less;
2371         }
2372
2373         /* ENA admin level init */
2374         rc = ena_com_admin_init(ena_dev, &aenq_handlers, true);
2375         if (rc) {
2376                 dev_err(dev,
2377                         "Can not initialize ena admin queue with device\n");
2378                 goto err_mmio_read_less;
2379         }
2380
2381         /* To enable the msix interrupts the driver needs to know the number
2382          * of queues. So the driver uses polling mode to retrieve this
2383          * information
2384          */
2385         ena_com_set_admin_polling_mode(ena_dev, true);
2386
2387         ena_config_host_info(ena_dev);
2388
2389         /* Get Device Attributes*/
2390         rc = ena_com_get_dev_attr_feat(ena_dev, get_feat_ctx);
2391         if (rc) {
2392                 dev_err(dev, "Cannot get attribute for ena device rc=%d\n", rc);
2393                 goto err_admin_init;
2394         }
2395
2396         /* Try to turn all the available aenq groups */
2397         aenq_groups = BIT(ENA_ADMIN_LINK_CHANGE) |
2398                 BIT(ENA_ADMIN_FATAL_ERROR) |
2399                 BIT(ENA_ADMIN_WARNING) |
2400                 BIT(ENA_ADMIN_NOTIFICATION) |
2401                 BIT(ENA_ADMIN_KEEP_ALIVE);
2402
2403         aenq_groups &= get_feat_ctx->aenq.supported_groups;
2404
2405         rc = ena_com_set_aenq_config(ena_dev, aenq_groups);
2406         if (rc) {
2407                 dev_err(dev, "Cannot configure aenq groups rc= %d\n", rc);
2408                 goto err_admin_init;
2409         }
2410
2411         *wd_state = !!(aenq_groups & BIT(ENA_ADMIN_KEEP_ALIVE));
2412
2413         return 0;
2414
2415 err_admin_init:
2416         ena_com_delete_host_info(ena_dev);
2417         ena_com_admin_destroy(ena_dev);
2418 err_mmio_read_less:
2419         ena_com_mmio_reg_read_request_destroy(ena_dev);
2420
2421         return rc;
2422 }
2423
2424 static int ena_enable_msix_and_set_admin_interrupts(struct ena_adapter *adapter,
2425                                                     int io_vectors)
2426 {
2427         struct ena_com_dev *ena_dev = adapter->ena_dev;
2428         struct device *dev = &adapter->pdev->dev;
2429         int rc;
2430
2431         rc = ena_enable_msix(adapter, io_vectors);
2432         if (rc) {
2433                 dev_err(dev, "Can not reserve msix vectors\n");
2434                 return rc;
2435         }
2436
2437         ena_setup_mgmnt_intr(adapter);
2438
2439         rc = ena_request_mgmnt_irq(adapter);
2440         if (rc) {
2441                 dev_err(dev, "Can not setup management interrupts\n");
2442                 goto err_disable_msix;
2443         }
2444
2445         ena_com_set_admin_polling_mode(ena_dev, false);
2446
2447         ena_com_admin_aenq_enable(ena_dev);
2448
2449         return 0;
2450
2451 err_disable_msix:
2452         pci_free_irq_vectors(adapter->pdev);
2453         return rc;
2454 }
2455
2456 static void ena_fw_reset_device(struct work_struct *work)
2457 {
2458         struct ena_com_dev_get_features_ctx get_feat_ctx;
2459         struct ena_adapter *adapter =
2460                 container_of(work, struct ena_adapter, reset_task);
2461         struct net_device *netdev = adapter->netdev;
2462         struct ena_com_dev *ena_dev = adapter->ena_dev;
2463         struct pci_dev *pdev = adapter->pdev;
2464         bool dev_up, wd_state;
2465         int rc;
2466
2467         if (unlikely(!test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags))) {
2468                 dev_err(&pdev->dev,
2469                         "device reset schedule while reset bit is off\n");
2470                 return;
2471         }
2472
2473         netif_carrier_off(netdev);
2474
2475         del_timer_sync(&adapter->timer_service);
2476
2477         rtnl_lock();
2478
2479         dev_up = test_bit(ENA_FLAG_DEV_UP, &adapter->flags);
2480         ena_com_set_admin_running_state(ena_dev, false);
2481
2482         /* After calling ena_close the tx queues and the napi
2483          * are disabled so no one can interfere or touch the
2484          * data structures
2485          */
2486         ena_close(netdev);
2487
2488         ena_free_mgmnt_irq(adapter);
2489
2490         pci_free_irq_vectors(adapter->pdev);
2491
2492         ena_com_abort_admin_commands(ena_dev);
2493
2494         ena_com_wait_for_abort_completion(ena_dev);
2495
2496         ena_com_admin_destroy(ena_dev);
2497
2498         ena_com_mmio_reg_read_request_destroy(ena_dev);
2499
2500         clear_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
2501
2502         /* Finish with the destroy part. Start the init part */
2503
2504         rc = ena_device_init(ena_dev, adapter->pdev, &get_feat_ctx, &wd_state);
2505         if (rc) {
2506                 dev_err(&pdev->dev, "Can not initialize device\n");
2507                 goto err;
2508         }
2509         adapter->wd_state = wd_state;
2510
2511         rc = ena_device_validate_params(adapter, &get_feat_ctx);
2512         if (rc) {
2513                 dev_err(&pdev->dev, "Validation of device parameters failed\n");
2514                 goto err_device_destroy;
2515         }
2516
2517         rc = ena_enable_msix_and_set_admin_interrupts(adapter,
2518                                                       adapter->num_queues);
2519         if (rc) {
2520                 dev_err(&pdev->dev, "Enable MSI-X failed\n");
2521                 goto err_device_destroy;
2522         }
2523         /* If the interface was up before the reset bring it up */
2524         if (dev_up) {
2525                 rc = ena_up(adapter);
2526                 if (rc) {
2527                         dev_err(&pdev->dev, "Failed to create I/O queues\n");
2528                         goto err_disable_msix;
2529                 }
2530         }
2531
2532         mod_timer(&adapter->timer_service, round_jiffies(jiffies + HZ));
2533
2534         rtnl_unlock();
2535
2536         dev_err(&pdev->dev, "Device reset completed successfully\n");
2537
2538         return;
2539 err_disable_msix:
2540         ena_free_mgmnt_irq(adapter);
2541         pci_free_irq_vectors(adapter->pdev);
2542 err_device_destroy:
2543         ena_com_admin_destroy(ena_dev);
2544 err:
2545         rtnl_unlock();
2546
2547         clear_bit(ENA_FLAG_DEVICE_RUNNING, &adapter->flags);
2548
2549         dev_err(&pdev->dev,
2550                 "Reset attempt failed. Can not reset the device\n");
2551 }
2552
2553 static void check_for_missing_tx_completions(struct ena_adapter *adapter)
2554 {
2555         struct ena_tx_buffer *tx_buf;
2556         unsigned long last_jiffies;
2557         struct ena_ring *tx_ring;
2558         int i, j, budget;
2559         u32 missed_tx;
2560
2561         /* Make sure the driver doesn't turn the device in other process */
2562         smp_rmb();
2563
2564         if (!test_bit(ENA_FLAG_DEV_UP, &adapter->flags))
2565                 return;
2566
2567         if (test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags))
2568                 return;
2569
2570         budget = ENA_MONITORED_TX_QUEUES;
2571
2572         for (i = adapter->last_monitored_tx_qid; i < adapter->num_queues; i++) {
2573                 tx_ring = &adapter->tx_ring[i];
2574
2575                 for (j = 0; j < tx_ring->ring_size; j++) {
2576                         tx_buf = &tx_ring->tx_buffer_info[j];
2577                         last_jiffies = tx_buf->last_jiffies;
2578                         if (unlikely(last_jiffies && time_is_before_jiffies(last_jiffies + TX_TIMEOUT))) {
2579                                 netif_notice(adapter, tx_err, adapter->netdev,
2580                                              "Found a Tx that wasn't completed on time, qid %d, index %d.\n",
2581                                              tx_ring->qid, j);
2582
2583                                 u64_stats_update_begin(&tx_ring->syncp);
2584                                 missed_tx = tx_ring->tx_stats.missing_tx_comp++;
2585                                 u64_stats_update_end(&tx_ring->syncp);
2586
2587                                 /* Clear last jiffies so the lost buffer won't
2588                                  * be counted twice.
2589                                  */
2590                                 tx_buf->last_jiffies = 0;
2591
2592                                 if (unlikely(missed_tx > MAX_NUM_OF_TIMEOUTED_PACKETS)) {
2593                                         netif_err(adapter, tx_err, adapter->netdev,
2594                                                   "The number of lost tx completion is above the threshold (%d > %d). Reset the device\n",
2595                                                   missed_tx, MAX_NUM_OF_TIMEOUTED_PACKETS);
2596                                         set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
2597                                 }
2598                         }
2599                 }
2600
2601                 budget--;
2602                 if (!budget)
2603                         break;
2604         }
2605
2606         adapter->last_monitored_tx_qid = i % adapter->num_queues;
2607 }
2608
2609 /* Check for keep alive expiration */
2610 static void check_for_missing_keep_alive(struct ena_adapter *adapter)
2611 {
2612         unsigned long keep_alive_expired;
2613
2614         if (!adapter->wd_state)
2615                 return;
2616
2617         keep_alive_expired = round_jiffies(adapter->last_keep_alive_jiffies
2618                                            + ENA_DEVICE_KALIVE_TIMEOUT);
2619         if (unlikely(time_is_before_jiffies(keep_alive_expired))) {
2620                 netif_err(adapter, drv, adapter->netdev,
2621                           "Keep alive watchdog timeout.\n");
2622                 u64_stats_update_begin(&adapter->syncp);
2623                 adapter->dev_stats.wd_expired++;
2624                 u64_stats_update_end(&adapter->syncp);
2625                 set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
2626         }
2627 }
2628
2629 static void check_for_admin_com_state(struct ena_adapter *adapter)
2630 {
2631         if (unlikely(!ena_com_get_admin_running_state(adapter->ena_dev))) {
2632                 netif_err(adapter, drv, adapter->netdev,
2633                           "ENA admin queue is not in running state!\n");
2634                 u64_stats_update_begin(&adapter->syncp);
2635                 adapter->dev_stats.admin_q_pause++;
2636                 u64_stats_update_end(&adapter->syncp);
2637                 set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
2638         }
2639 }
2640
2641 static void ena_update_host_info(struct ena_admin_host_info *host_info,
2642                                  struct net_device *netdev)
2643 {
2644         host_info->supported_network_features[0] =
2645                 netdev->features & GENMASK_ULL(31, 0);
2646         host_info->supported_network_features[1] =
2647                 (netdev->features & GENMASK_ULL(63, 32)) >> 32;
2648 }
2649
2650 static void ena_timer_service(unsigned long data)
2651 {
2652         struct ena_adapter *adapter = (struct ena_adapter *)data;
2653         u8 *debug_area = adapter->ena_dev->host_attr.debug_area_virt_addr;
2654         struct ena_admin_host_info *host_info =
2655                 adapter->ena_dev->host_attr.host_info;
2656
2657         check_for_missing_keep_alive(adapter);
2658
2659         check_for_admin_com_state(adapter);
2660
2661         check_for_missing_tx_completions(adapter);
2662
2663         if (debug_area)
2664                 ena_dump_stats_to_buf(adapter, debug_area);
2665
2666         if (host_info)
2667                 ena_update_host_info(host_info, adapter->netdev);
2668
2669         if (unlikely(test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags))) {
2670                 netif_err(adapter, drv, adapter->netdev,
2671                           "Trigger reset is on\n");
2672                 ena_dump_stats_to_dmesg(adapter);
2673                 queue_work(ena_wq, &adapter->reset_task);
2674                 return;
2675         }
2676
2677         /* Reset the timer */
2678         mod_timer(&adapter->timer_service, jiffies + HZ);
2679 }
2680
2681 static int ena_calc_io_queue_num(struct pci_dev *pdev,
2682                                  struct ena_com_dev *ena_dev,
2683                                  struct ena_com_dev_get_features_ctx *get_feat_ctx)
2684 {
2685         int io_sq_num, io_queue_num;
2686
2687         /* In case of LLQ use the llq number in the get feature cmd */
2688         if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) {
2689                 io_sq_num = get_feat_ctx->max_queues.max_llq_num;
2690
2691                 if (io_sq_num == 0) {
2692                         dev_err(&pdev->dev,
2693                                 "Trying to use LLQ but llq_num is 0. Fall back into regular queues\n");
2694
2695                         ena_dev->tx_mem_queue_type =
2696                                 ENA_ADMIN_PLACEMENT_POLICY_HOST;
2697                         io_sq_num = get_feat_ctx->max_queues.max_sq_num;
2698                 }
2699         } else {
2700                 io_sq_num = get_feat_ctx->max_queues.max_sq_num;
2701         }
2702
2703         io_queue_num = min_t(int, num_online_cpus(), ENA_MAX_NUM_IO_QUEUES);
2704         io_queue_num = min_t(int, io_queue_num, io_sq_num);
2705         io_queue_num = min_t(int, io_queue_num,
2706                              get_feat_ctx->max_queues.max_cq_num);
2707         /* 1 IRQ for for mgmnt and 1 IRQs for each IO direction */
2708         io_queue_num = min_t(int, io_queue_num, pci_msix_vec_count(pdev) - 1);
2709         if (unlikely(!io_queue_num)) {
2710                 dev_err(&pdev->dev, "The device doesn't have io queues\n");
2711                 return -EFAULT;
2712         }
2713
2714         return io_queue_num;
2715 }
2716
2717 static void ena_set_push_mode(struct pci_dev *pdev, struct ena_com_dev *ena_dev,
2718                               struct ena_com_dev_get_features_ctx *get_feat_ctx)
2719 {
2720         bool has_mem_bar;
2721
2722         has_mem_bar = pci_select_bars(pdev, IORESOURCE_MEM) & BIT(ENA_MEM_BAR);
2723
2724         /* Enable push mode if device supports LLQ */
2725         if (has_mem_bar && (get_feat_ctx->max_queues.max_llq_num > 0))
2726                 ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_DEV;
2727         else
2728                 ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST;
2729 }
2730
2731 static void ena_set_dev_offloads(struct ena_com_dev_get_features_ctx *feat,
2732                                  struct net_device *netdev)
2733 {
2734         netdev_features_t dev_features = 0;
2735
2736         /* Set offload features */
2737         if (feat->offload.tx &
2738                 ENA_ADMIN_FEATURE_OFFLOAD_DESC_TX_L4_IPV4_CSUM_PART_MASK)
2739                 dev_features |= NETIF_F_IP_CSUM;
2740
2741         if (feat->offload.tx &
2742                 ENA_ADMIN_FEATURE_OFFLOAD_DESC_TX_L4_IPV6_CSUM_PART_MASK)
2743                 dev_features |= NETIF_F_IPV6_CSUM;
2744
2745         if (feat->offload.tx & ENA_ADMIN_FEATURE_OFFLOAD_DESC_TSO_IPV4_MASK)
2746                 dev_features |= NETIF_F_TSO;
2747
2748         if (feat->offload.tx & ENA_ADMIN_FEATURE_OFFLOAD_DESC_TSO_IPV6_MASK)
2749                 dev_features |= NETIF_F_TSO6;
2750
2751         if (feat->offload.tx & ENA_ADMIN_FEATURE_OFFLOAD_DESC_TSO_ECN_MASK)
2752                 dev_features |= NETIF_F_TSO_ECN;
2753
2754         if (feat->offload.rx_supported &
2755                 ENA_ADMIN_FEATURE_OFFLOAD_DESC_RX_L4_IPV4_CSUM_MASK)
2756                 dev_features |= NETIF_F_RXCSUM;
2757
2758         if (feat->offload.rx_supported &
2759                 ENA_ADMIN_FEATURE_OFFLOAD_DESC_RX_L4_IPV6_CSUM_MASK)
2760                 dev_features |= NETIF_F_RXCSUM;
2761
2762         netdev->features =
2763                 dev_features |
2764                 NETIF_F_SG |
2765                 NETIF_F_RXHASH |
2766                 NETIF_F_HIGHDMA;
2767
2768         netdev->hw_features |= netdev->features;
2769         netdev->vlan_features |= netdev->features;
2770 }
2771
2772 static void ena_set_conf_feat_params(struct ena_adapter *adapter,
2773                                      struct ena_com_dev_get_features_ctx *feat)
2774 {
2775         struct net_device *netdev = adapter->netdev;
2776
2777         /* Copy mac address */
2778         if (!is_valid_ether_addr(feat->dev_attr.mac_addr)) {
2779                 eth_hw_addr_random(netdev);
2780                 ether_addr_copy(adapter->mac_addr, netdev->dev_addr);
2781         } else {
2782                 ether_addr_copy(adapter->mac_addr, feat->dev_attr.mac_addr);
2783                 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
2784         }
2785
2786         /* Set offload features */
2787         ena_set_dev_offloads(feat, netdev);
2788
2789         adapter->max_mtu = feat->dev_attr.max_mtu;
2790         netdev->max_mtu = adapter->max_mtu;
2791         netdev->min_mtu = ENA_MIN_MTU;
2792 }
2793
2794 static int ena_rss_init_default(struct ena_adapter *adapter)
2795 {
2796         struct ena_com_dev *ena_dev = adapter->ena_dev;
2797         struct device *dev = &adapter->pdev->dev;
2798         int rc, i;
2799         u32 val;
2800
2801         rc = ena_com_rss_init(ena_dev, ENA_RX_RSS_TABLE_LOG_SIZE);
2802         if (unlikely(rc)) {
2803                 dev_err(dev, "Cannot init indirect table\n");
2804                 goto err_rss_init;
2805         }
2806
2807         for (i = 0; i < ENA_RX_RSS_TABLE_SIZE; i++) {
2808                 val = ethtool_rxfh_indir_default(i, adapter->num_queues);
2809                 rc = ena_com_indirect_table_fill_entry(ena_dev, i,
2810                                                        ENA_IO_RXQ_IDX(val));
2811                 if (unlikely(rc && (rc != -EPERM))) {
2812                         dev_err(dev, "Cannot fill indirect table\n");
2813                         goto err_fill_indir;
2814                 }
2815         }
2816
2817         rc = ena_com_fill_hash_function(ena_dev, ENA_ADMIN_CRC32, NULL,
2818                                         ENA_HASH_KEY_SIZE, 0xFFFFFFFF);
2819         if (unlikely(rc && (rc != -EPERM))) {
2820                 dev_err(dev, "Cannot fill hash function\n");
2821                 goto err_fill_indir;
2822         }
2823
2824         rc = ena_com_set_default_hash_ctrl(ena_dev);
2825         if (unlikely(rc && (rc != -EPERM))) {
2826                 dev_err(dev, "Cannot fill hash control\n");
2827                 goto err_fill_indir;
2828         }
2829
2830         return 0;
2831
2832 err_fill_indir:
2833         ena_com_rss_destroy(ena_dev);
2834 err_rss_init:
2835
2836         return rc;
2837 }
2838
2839 static void ena_release_bars(struct ena_com_dev *ena_dev, struct pci_dev *pdev)
2840 {
2841         int release_bars;
2842
2843         release_bars = pci_select_bars(pdev, IORESOURCE_MEM) & ENA_BAR_MASK;
2844         pci_release_selected_regions(pdev, release_bars);
2845 }
2846
2847 static int ena_calc_queue_size(struct pci_dev *pdev,
2848                                struct ena_com_dev *ena_dev,
2849                                u16 *max_tx_sgl_size,
2850                                u16 *max_rx_sgl_size,
2851                                struct ena_com_dev_get_features_ctx *get_feat_ctx)
2852 {
2853         u32 queue_size = ENA_DEFAULT_RING_SIZE;
2854
2855         queue_size = min_t(u32, queue_size,
2856                            get_feat_ctx->max_queues.max_cq_depth);
2857         queue_size = min_t(u32, queue_size,
2858                            get_feat_ctx->max_queues.max_sq_depth);
2859
2860         if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV)
2861                 queue_size = min_t(u32, queue_size,
2862                                    get_feat_ctx->max_queues.max_llq_depth);
2863
2864         queue_size = rounddown_pow_of_two(queue_size);
2865
2866         if (unlikely(!queue_size)) {
2867                 dev_err(&pdev->dev, "Invalid queue size\n");
2868                 return -EFAULT;
2869         }
2870
2871         *max_tx_sgl_size = min_t(u16, ENA_PKT_MAX_BUFS,
2872                                  get_feat_ctx->max_queues.max_packet_tx_descs);
2873         *max_rx_sgl_size = min_t(u16, ENA_PKT_MAX_BUFS,
2874                                  get_feat_ctx->max_queues.max_packet_rx_descs);
2875
2876         return queue_size;
2877 }
2878
2879 /* ena_probe - Device Initialization Routine
2880  * @pdev: PCI device information struct
2881  * @ent: entry in ena_pci_tbl
2882  *
2883  * Returns 0 on success, negative on failure
2884  *
2885  * ena_probe initializes an adapter identified by a pci_dev structure.
2886  * The OS initialization, configuring of the adapter private structure,
2887  * and a hardware reset occur.
2888  */
2889 static int ena_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
2890 {
2891         struct ena_com_dev_get_features_ctx get_feat_ctx;
2892         static int version_printed;
2893         struct net_device *netdev;
2894         struct ena_adapter *adapter;
2895         struct ena_com_dev *ena_dev = NULL;
2896         static int adapters_found;
2897         int io_queue_num, bars, rc;
2898         int queue_size;
2899         u16 tx_sgl_size = 0;
2900         u16 rx_sgl_size = 0;
2901         bool wd_state;
2902
2903         dev_dbg(&pdev->dev, "%s\n", __func__);
2904
2905         if (version_printed++ == 0)
2906                 dev_info(&pdev->dev, "%s", version);
2907
2908         rc = pci_enable_device_mem(pdev);
2909         if (rc) {
2910                 dev_err(&pdev->dev, "pci_enable_device_mem() failed!\n");
2911                 return rc;
2912         }
2913
2914         pci_set_master(pdev);
2915
2916         ena_dev = vzalloc(sizeof(*ena_dev));
2917         if (!ena_dev) {
2918                 rc = -ENOMEM;
2919                 goto err_disable_device;
2920         }
2921
2922         bars = pci_select_bars(pdev, IORESOURCE_MEM) & ENA_BAR_MASK;
2923         rc = pci_request_selected_regions(pdev, bars, DRV_MODULE_NAME);
2924         if (rc) {
2925                 dev_err(&pdev->dev, "pci_request_selected_regions failed %d\n",
2926                         rc);
2927                 goto err_free_ena_dev;
2928         }
2929
2930         ena_dev->reg_bar = ioremap(pci_resource_start(pdev, ENA_REG_BAR),
2931                                    pci_resource_len(pdev, ENA_REG_BAR));
2932         if (!ena_dev->reg_bar) {
2933                 dev_err(&pdev->dev, "failed to remap regs bar\n");
2934                 rc = -EFAULT;
2935                 goto err_free_region;
2936         }
2937
2938         ena_dev->dmadev = &pdev->dev;
2939
2940         rc = ena_device_init(ena_dev, pdev, &get_feat_ctx, &wd_state);
2941         if (rc) {
2942                 dev_err(&pdev->dev, "ena device init failed\n");
2943                 if (rc == -ETIME)
2944                         rc = -EPROBE_DEFER;
2945                 goto err_free_region;
2946         }
2947
2948         ena_set_push_mode(pdev, ena_dev, &get_feat_ctx);
2949
2950         if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) {
2951                 ena_dev->mem_bar = ioremap_wc(pci_resource_start(pdev, ENA_MEM_BAR),
2952                                               pci_resource_len(pdev, ENA_MEM_BAR));
2953                 if (!ena_dev->mem_bar) {
2954                         rc = -EFAULT;
2955                         goto err_device_destroy;
2956                 }
2957         }
2958
2959         /* initial Tx interrupt delay, Assumes 1 usec granularity.
2960         * Updated during device initialization with the real granularity
2961         */
2962         ena_dev->intr_moder_tx_interval = ENA_INTR_INITIAL_TX_INTERVAL_USECS;
2963         io_queue_num = ena_calc_io_queue_num(pdev, ena_dev, &get_feat_ctx);
2964         queue_size = ena_calc_queue_size(pdev, ena_dev, &tx_sgl_size,
2965                                          &rx_sgl_size, &get_feat_ctx);
2966         if ((queue_size <= 0) || (io_queue_num <= 0)) {
2967                 rc = -EFAULT;
2968                 goto err_device_destroy;
2969         }
2970
2971         dev_info(&pdev->dev, "creating %d io queues. queue size: %d\n",
2972                  io_queue_num, queue_size);
2973
2974         /* dev zeroed in init_etherdev */
2975         netdev = alloc_etherdev_mq(sizeof(struct ena_adapter), io_queue_num);
2976         if (!netdev) {
2977                 dev_err(&pdev->dev, "alloc_etherdev_mq failed\n");
2978                 rc = -ENOMEM;
2979                 goto err_device_destroy;
2980         }
2981
2982         SET_NETDEV_DEV(netdev, &pdev->dev);
2983
2984         adapter = netdev_priv(netdev);
2985         pci_set_drvdata(pdev, adapter);
2986
2987         adapter->ena_dev = ena_dev;
2988         adapter->netdev = netdev;
2989         adapter->pdev = pdev;
2990
2991         ena_set_conf_feat_params(adapter, &get_feat_ctx);
2992
2993         adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
2994
2995         adapter->tx_ring_size = queue_size;
2996         adapter->rx_ring_size = queue_size;
2997
2998         adapter->max_tx_sgl_size = tx_sgl_size;
2999         adapter->max_rx_sgl_size = rx_sgl_size;
3000
3001         adapter->num_queues = io_queue_num;
3002         adapter->last_monitored_tx_qid = 0;
3003
3004         adapter->rx_copybreak = ENA_DEFAULT_RX_COPYBREAK;
3005         adapter->wd_state = wd_state;
3006
3007         snprintf(adapter->name, ENA_NAME_MAX_LEN, "ena_%d", adapters_found);
3008
3009         rc = ena_com_init_interrupt_moderation(adapter->ena_dev);
3010         if (rc) {
3011                 dev_err(&pdev->dev,
3012                         "Failed to query interrupt moderation feature\n");
3013                 goto err_netdev_destroy;
3014         }
3015         ena_init_io_rings(adapter);
3016
3017         netdev->netdev_ops = &ena_netdev_ops;
3018         netdev->watchdog_timeo = TX_TIMEOUT;
3019         ena_set_ethtool_ops(netdev);
3020
3021         netdev->priv_flags |= IFF_UNICAST_FLT;
3022
3023         u64_stats_init(&adapter->syncp);
3024
3025         rc = ena_enable_msix_and_set_admin_interrupts(adapter, io_queue_num);
3026         if (rc) {
3027                 dev_err(&pdev->dev,
3028                         "Failed to enable and set the admin interrupts\n");
3029                 goto err_worker_destroy;
3030         }
3031         rc = ena_rss_init_default(adapter);
3032         if (rc && (rc != -EPERM)) {
3033                 dev_err(&pdev->dev, "Cannot init RSS rc: %d\n", rc);
3034                 goto err_free_msix;
3035         }
3036
3037         ena_config_debug_area(adapter);
3038
3039         memcpy(adapter->netdev->perm_addr, adapter->mac_addr, netdev->addr_len);
3040
3041         netif_carrier_off(netdev);
3042
3043         rc = register_netdev(netdev);
3044         if (rc) {
3045                 dev_err(&pdev->dev, "Cannot register net device\n");
3046                 goto err_rss;
3047         }
3048
3049         INIT_WORK(&adapter->suspend_io_task, ena_device_io_suspend);
3050         INIT_WORK(&adapter->resume_io_task, ena_device_io_resume);
3051         INIT_WORK(&adapter->reset_task, ena_fw_reset_device);
3052
3053         adapter->last_keep_alive_jiffies = jiffies;
3054
3055         setup_timer(&adapter->timer_service, ena_timer_service,
3056                     (unsigned long)adapter);
3057         mod_timer(&adapter->timer_service, round_jiffies(jiffies + HZ));
3058
3059         dev_info(&pdev->dev, "%s found at mem %lx, mac addr %pM Queues %d\n",
3060                  DEVICE_NAME, (long)pci_resource_start(pdev, 0),
3061                  netdev->dev_addr, io_queue_num);
3062
3063         set_bit(ENA_FLAG_DEVICE_RUNNING, &adapter->flags);
3064
3065         adapters_found++;
3066
3067         return 0;
3068
3069 err_rss:
3070         ena_com_delete_debug_area(ena_dev);
3071         ena_com_rss_destroy(ena_dev);
3072 err_free_msix:
3073         ena_com_dev_reset(ena_dev);
3074         ena_free_mgmnt_irq(adapter);
3075         pci_free_irq_vectors(adapter->pdev);
3076 err_worker_destroy:
3077         ena_com_destroy_interrupt_moderation(ena_dev);
3078         del_timer(&adapter->timer_service);
3079         cancel_work_sync(&adapter->suspend_io_task);
3080         cancel_work_sync(&adapter->resume_io_task);
3081 err_netdev_destroy:
3082         free_netdev(netdev);
3083 err_device_destroy:
3084         ena_com_delete_host_info(ena_dev);
3085         ena_com_admin_destroy(ena_dev);
3086 err_free_region:
3087         ena_release_bars(ena_dev, pdev);
3088 err_free_ena_dev:
3089         vfree(ena_dev);
3090 err_disable_device:
3091         pci_disable_device(pdev);
3092         return rc;
3093 }
3094
3095 /*****************************************************************************/
3096 static int ena_sriov_configure(struct pci_dev *dev, int numvfs)
3097 {
3098         int rc;
3099
3100         if (numvfs > 0) {
3101                 rc = pci_enable_sriov(dev, numvfs);
3102                 if (rc != 0) {
3103                         dev_err(&dev->dev,
3104                                 "pci_enable_sriov failed to enable: %d vfs with the error: %d\n",
3105                                 numvfs, rc);
3106                         return rc;
3107                 }
3108
3109                 return numvfs;
3110         }
3111
3112         if (numvfs == 0) {
3113                 pci_disable_sriov(dev);
3114                 return 0;
3115         }
3116
3117         return -EINVAL;
3118 }
3119
3120 /*****************************************************************************/
3121 /*****************************************************************************/
3122
3123 /* ena_remove - Device Removal Routine
3124  * @pdev: PCI device information struct
3125  *
3126  * ena_remove is called by the PCI subsystem to alert the driver
3127  * that it should release a PCI device.
3128  */
3129 static void ena_remove(struct pci_dev *pdev)
3130 {
3131         struct ena_adapter *adapter = pci_get_drvdata(pdev);
3132         struct ena_com_dev *ena_dev;
3133         struct net_device *netdev;
3134
3135         ena_dev = adapter->ena_dev;
3136         netdev = adapter->netdev;
3137
3138 #ifdef CONFIG_RFS_ACCEL
3139         if ((adapter->msix_vecs >= 1) && (netdev->rx_cpu_rmap)) {
3140                 free_irq_cpu_rmap(netdev->rx_cpu_rmap);
3141                 netdev->rx_cpu_rmap = NULL;
3142         }
3143 #endif /* CONFIG_RFS_ACCEL */
3144
3145         unregister_netdev(netdev);
3146         del_timer_sync(&adapter->timer_service);
3147
3148         cancel_work_sync(&adapter->reset_task);
3149
3150         cancel_work_sync(&adapter->suspend_io_task);
3151
3152         cancel_work_sync(&adapter->resume_io_task);
3153
3154         /* Reset the device only if the device is running. */
3155         if (test_bit(ENA_FLAG_DEVICE_RUNNING, &adapter->flags))
3156                 ena_com_dev_reset(ena_dev);
3157
3158         ena_free_mgmnt_irq(adapter);
3159
3160         pci_free_irq_vectors(adapter->pdev);
3161
3162         free_netdev(netdev);
3163
3164         ena_com_mmio_reg_read_request_destroy(ena_dev);
3165
3166         ena_com_abort_admin_commands(ena_dev);
3167
3168         ena_com_wait_for_abort_completion(ena_dev);
3169
3170         ena_com_admin_destroy(ena_dev);
3171
3172         ena_com_rss_destroy(ena_dev);
3173
3174         ena_com_delete_debug_area(ena_dev);
3175
3176         ena_com_delete_host_info(ena_dev);
3177
3178         ena_release_bars(ena_dev, pdev);
3179
3180         pci_disable_device(pdev);
3181
3182         ena_com_destroy_interrupt_moderation(ena_dev);
3183
3184         vfree(ena_dev);
3185 }
3186
3187 static struct pci_driver ena_pci_driver = {
3188         .name           = DRV_MODULE_NAME,
3189         .id_table       = ena_pci_tbl,
3190         .probe          = ena_probe,
3191         .remove         = ena_remove,
3192         .sriov_configure = ena_sriov_configure,
3193 };
3194
3195 static int __init ena_init(void)
3196 {
3197         pr_info("%s", version);
3198
3199         ena_wq = create_singlethread_workqueue(DRV_MODULE_NAME);
3200         if (!ena_wq) {
3201                 pr_err("Failed to create workqueue\n");
3202                 return -ENOMEM;
3203         }
3204
3205         return pci_register_driver(&ena_pci_driver);
3206 }
3207
3208 static void __exit ena_cleanup(void)
3209 {
3210         pci_unregister_driver(&ena_pci_driver);
3211
3212         if (ena_wq) {
3213                 destroy_workqueue(ena_wq);
3214                 ena_wq = NULL;
3215         }
3216 }
3217
3218 /******************************************************************************
3219  ******************************** AENQ Handlers *******************************
3220  *****************************************************************************/
3221 /* ena_update_on_link_change:
3222  * Notify the network interface about the change in link status
3223  */
3224 static void ena_update_on_link_change(void *adapter_data,
3225                                       struct ena_admin_aenq_entry *aenq_e)
3226 {
3227         struct ena_adapter *adapter = (struct ena_adapter *)adapter_data;
3228         struct ena_admin_aenq_link_change_desc *aenq_desc =
3229                 (struct ena_admin_aenq_link_change_desc *)aenq_e;
3230         int status = aenq_desc->flags &
3231                 ENA_ADMIN_AENQ_LINK_CHANGE_DESC_LINK_STATUS_MASK;
3232
3233         if (status) {
3234                 netdev_dbg(adapter->netdev, "%s\n", __func__);
3235                 set_bit(ENA_FLAG_LINK_UP, &adapter->flags);
3236                 netif_carrier_on(adapter->netdev);
3237         } else {
3238                 clear_bit(ENA_FLAG_LINK_UP, &adapter->flags);
3239                 netif_carrier_off(adapter->netdev);
3240         }
3241 }
3242
3243 static void ena_keep_alive_wd(void *adapter_data,
3244                               struct ena_admin_aenq_entry *aenq_e)
3245 {
3246         struct ena_adapter *adapter = (struct ena_adapter *)adapter_data;
3247
3248         adapter->last_keep_alive_jiffies = jiffies;
3249 }
3250
3251 static void ena_notification(void *adapter_data,
3252                              struct ena_admin_aenq_entry *aenq_e)
3253 {
3254         struct ena_adapter *adapter = (struct ena_adapter *)adapter_data;
3255
3256         WARN(aenq_e->aenq_common_desc.group != ENA_ADMIN_NOTIFICATION,
3257              "Invalid group(%x) expected %x\n",
3258              aenq_e->aenq_common_desc.group,
3259              ENA_ADMIN_NOTIFICATION);
3260
3261         switch (aenq_e->aenq_common_desc.syndrom) {
3262         case ENA_ADMIN_SUSPEND:
3263                 /* Suspend just the IO queues.
3264                  * We deliberately don't suspend admin so the timer and
3265                  * the keep_alive events should remain.
3266                  */
3267                 queue_work(ena_wq, &adapter->suspend_io_task);
3268                 break;
3269         case ENA_ADMIN_RESUME:
3270                 queue_work(ena_wq, &adapter->resume_io_task);
3271                 break;
3272         default:
3273                 netif_err(adapter, drv, adapter->netdev,
3274                           "Invalid aenq notification link state %d\n",
3275                           aenq_e->aenq_common_desc.syndrom);
3276         }
3277 }
3278
3279 /* This handler will called for unknown event group or unimplemented handlers*/
3280 static void unimplemented_aenq_handler(void *data,
3281                                        struct ena_admin_aenq_entry *aenq_e)
3282 {
3283         struct ena_adapter *adapter = (struct ena_adapter *)data;
3284
3285         netif_err(adapter, drv, adapter->netdev,
3286                   "Unknown event was received or event with unimplemented handler\n");
3287 }
3288
3289 static struct ena_aenq_handlers aenq_handlers = {
3290         .handlers = {
3291                 [ENA_ADMIN_LINK_CHANGE] = ena_update_on_link_change,
3292                 [ENA_ADMIN_NOTIFICATION] = ena_notification,
3293                 [ENA_ADMIN_KEEP_ALIVE] = ena_keep_alive_wd,
3294         },
3295         .unimplemented_handler = unimplemented_aenq_handler
3296 };
3297
3298 module_init(ena_init);
3299 module_exit(ena_cleanup);