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 static void check_for_admin_com_state(struct ena_adapter *adapter);
  79 static void ena_destroy_device(struct ena_adapter *adapter, bool graceful);
  80 static int ena_restore_device(struct ena_adapter *adapter);
  81
  82 static void ena_tx_timeout(struct net_device *dev)
  83 {
  84         struct ena_adapter *adapter = netdev_priv(dev);
  85
  86         /* Change the state of the device to trigger reset
  87          * Check that we are not in the middle or a trigger already
  88          */
  89
  90         if (test_and_set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags))
  91                 return;
  92
  93         adapter->reset_reason = ENA_REGS_RESET_OS_NETDEV_WD;
  94         u64_stats_update_begin(&adapter->syncp);
  95         adapter->dev_stats.tx_timeout++;
  96         u64_stats_update_end(&adapter->syncp);
  97
  98         netif_err(adapter, tx_err, dev, "Transmit time out\n");
  99 }
 100
 101 static void update_rx_ring_mtu(struct ena_adapter *adapter, int mtu)
 102 {
 103         int i;
 104
 105         for (i = 0; i < adapter->num_queues; i++)
 106                 adapter->rx_ring[i].mtu = mtu;
 107 }
 108
 109 static int ena_change_mtu(struct net_device *dev, int new_mtu)
 110 {
 111         struct ena_adapter *adapter = netdev_priv(dev);
 112         int ret;
 113
 114         ret = ena_com_set_dev_mtu(adapter->ena_dev, new_mtu);
 115         if (!ret) {
 116                 netif_dbg(adapter, drv, dev, "set MTU to %d\n", new_mtu);
 117                 update_rx_ring_mtu(adapter, new_mtu);
 118                 dev->mtu = new_mtu;
 119         } else {
 120                 netif_err(adapter, drv, dev, "Failed to set MTU to %d\n",
 121                           new_mtu);
 122         }
 123
 124         return ret;
 125 }
 126
 127 static int ena_init_rx_cpu_rmap(struct ena_adapter *adapter)
 128 {
 129 #ifdef CONFIG_RFS_ACCEL
 130         u32 i;
 131         int rc;
 132
 133         adapter->netdev->rx_cpu_rmap = alloc_irq_cpu_rmap(adapter->num_queues);
 134         if (!adapter->netdev->rx_cpu_rmap)
 135                 return -ENOMEM;
 136         for (i = 0; i < adapter->num_queues; i++) {
 137                 int irq_idx = ENA_IO_IRQ_IDX(i);
 138
 139                 rc = irq_cpu_rmap_add(adapter->netdev->rx_cpu_rmap,
 140                                       pci_irq_vector(adapter->pdev, irq_idx));
 141                 if (rc) {
 142                         free_irq_cpu_rmap(adapter->netdev->rx_cpu_rmap);
 143                         adapter->netdev->rx_cpu_rmap = NULL;
 144                         return rc;
 145                 }
 146         }
 147 #endif /* CONFIG_RFS_ACCEL */
 148         return 0;
 149 }
 150
 151 static void ena_init_io_rings_common(struct ena_adapter *adapter,
 152                                      struct ena_ring *ring, u16 qid)
 153 {
 154         ring->qid = qid;
 155         ring->pdev = adapter->pdev;
 156         ring->dev = &adapter->pdev->dev;
 157         ring->netdev = adapter->netdev;
 158         ring->napi = &adapter->ena_napi[qid].napi;
 159         ring->adapter = adapter;
 160         ring->ena_dev = adapter->ena_dev;
 161         ring->per_napi_packets = 0;
 162         ring->per_napi_bytes = 0;
 163         ring->cpu = 0;
 164         ring->first_interrupt = false;
 165         ring->no_interrupt_event_cnt = 0;
 166         u64_stats_init(&ring->syncp);
 167 }
 168
 169 static void ena_init_io_rings(struct ena_adapter *adapter)
 170 {
 171         struct ena_com_dev *ena_dev;
 172         struct ena_ring *txr, *rxr;
 173         int i;
 174
 175         ena_dev = adapter->ena_dev;
 176
 177         for (i = 0; i < adapter->num_queues; i++) {
 178                 txr = &adapter->tx_ring[i];
 179                 rxr = &adapter->rx_ring[i];
 180
 181                 /* TX/RX common ring state */
 182                 ena_init_io_rings_common(adapter, txr, i);
 183                 ena_init_io_rings_common(adapter, rxr, i);
 184
 185                 /* TX specific ring state */
 186                 txr->ring_size = adapter->tx_ring_size;
 187                 txr->tx_max_header_size = ena_dev->tx_max_header_size;
 188                 txr->tx_mem_queue_type = ena_dev->tx_mem_queue_type;
 189                 txr->sgl_size = adapter->max_tx_sgl_size;
 190                 txr->smoothed_interval =
 191                         ena_com_get_nonadaptive_moderation_interval_tx(ena_dev);
 192
 193                 /* RX specific ring state */
 194                 rxr->ring_size = adapter->rx_ring_size;
 195                 rxr->rx_copybreak = adapter->rx_copybreak;
 196                 rxr->sgl_size = adapter->max_rx_sgl_size;
 197                 rxr->smoothed_interval =
 198                         ena_com_get_nonadaptive_moderation_interval_rx(ena_dev);
 199                 rxr->empty_rx_queue = 0;
 200         }
 201 }
 202
 203 /* ena_setup_tx_resources - allocate I/O Tx resources (Descriptors)
 204  * @adapter: network interface device structure
 205  * @qid: queue index
 206  *
 207  * Return 0 on success, negative on failure
 208  */
 209 static int ena_setup_tx_resources(struct ena_adapter *adapter, int qid)
 210 {
 211         struct ena_ring *tx_ring = &adapter->tx_ring[qid];
 212         struct ena_irq *ena_irq = &adapter->irq_tbl[ENA_IO_IRQ_IDX(qid)];
 213         int size, i, node;
 214
 215         if (tx_ring->tx_buffer_info) {
 216                 netif_err(adapter, ifup,
 217                           adapter->netdev, "tx_buffer_info info is not NULL");
 218                 return -EEXIST;
 219         }
 220
 221         size = sizeof(struct ena_tx_buffer) * tx_ring->ring_size;
 222         node = cpu_to_node(ena_irq->cpu);
 223
 224         tx_ring->tx_buffer_info = vzalloc_node(size, node);
 225         if (!tx_ring->tx_buffer_info) {
 226                 tx_ring->tx_buffer_info = vzalloc(size);
 227                 if (!tx_ring->tx_buffer_info)
 228                         return -ENOMEM;
 229         }
 230
 231         size = sizeof(u16) * tx_ring->ring_size;
 232         tx_ring->free_tx_ids = vzalloc_node(size, node);
 233         if (!tx_ring->free_tx_ids) {
 234                 tx_ring->free_tx_ids = vzalloc(size);
 235                 if (!tx_ring->free_tx_ids) {
 236                         vfree(tx_ring->tx_buffer_info);
 237                         return -ENOMEM;
 238                 }
 239         }
 240
 241         /* Req id ring for TX out of order completions */
 242         for (i = 0; i < tx_ring->ring_size; i++)
 243                 tx_ring->free_tx_ids[i] = i;
 244
 245         /* Reset tx statistics */
 246         memset(&tx_ring->tx_stats, 0x0, sizeof(tx_ring->tx_stats));
 247
 248         tx_ring->next_to_use = 0;
 249         tx_ring->next_to_clean = 0;
 250         tx_ring->cpu = ena_irq->cpu;
 251         return 0;
 252 }
 253
 254 /* ena_free_tx_resources - Free I/O Tx Resources per Queue
 255  * @adapter: network interface device structure
 256  * @qid: queue index
 257  *
 258  * Free all transmit software resources
 259  */
 260 static void ena_free_tx_resources(struct ena_adapter *adapter, int qid)
 261 {
 262         struct ena_ring *tx_ring = &adapter->tx_ring[qid];
 263
 264         vfree(tx_ring->tx_buffer_info);
 265         tx_ring->tx_buffer_info = NULL;
 266
 267         vfree(tx_ring->free_tx_ids);
 268         tx_ring->free_tx_ids = NULL;
 269 }
 270
 271 /* ena_setup_all_tx_resources - allocate I/O Tx queues resources for All queues
 272  * @adapter: private structure
 273  *
 274  * Return 0 on success, negative on failure
 275  */
 276 static int ena_setup_all_tx_resources(struct ena_adapter *adapter)
 277 {
 278         int i, rc = 0;
 279
 280         for (i = 0; i < adapter->num_queues; i++) {
 281                 rc = ena_setup_tx_resources(adapter, i);
 282                 if (rc)
 283                         goto err_setup_tx;
 284         }
 285
 286         return 0;
 287
 288 err_setup_tx:
 289
 290         netif_err(adapter, ifup, adapter->netdev,
 291                   "Tx queue %d: allocation failed\n", i);
 292
 293         /* rewind the index freeing the rings as we go */
 294         while (i--)
 295                 ena_free_tx_resources(adapter, i);
 296         return rc;
 297 }
 298
 299 /* ena_free_all_io_tx_resources - Free I/O Tx Resources for All Queues
 300  * @adapter: board private structure
 301  *
 302  * Free all transmit software resources
 303  */
 304 static void ena_free_all_io_tx_resources(struct ena_adapter *adapter)
 305 {
 306         int i;
 307
 308         for (i = 0; i < adapter->num_queues; i++)
 309                 ena_free_tx_resources(adapter, i);
 310 }
 311
 312 static inline int validate_rx_req_id(struct ena_ring *rx_ring, u16 req_id)
 313 {
 314         if (likely(req_id < rx_ring->ring_size))
 315                 return 0;
 316
 317         netif_err(rx_ring->adapter, rx_err, rx_ring->netdev,
 318                   "Invalid rx req_id: %hu\n", req_id);
 319
 320         u64_stats_update_begin(&rx_ring->syncp);
 321         rx_ring->rx_stats.bad_req_id++;
 322         u64_stats_update_end(&rx_ring->syncp);
 323
 324         /* Trigger device reset */
 325         rx_ring->adapter->reset_reason = ENA_REGS_RESET_INV_RX_REQ_ID;
 326         set_bit(ENA_FLAG_TRIGGER_RESET, &rx_ring->adapter->flags);
 327         return -EFAULT;
 328 }
 329
 330 /* ena_setup_rx_resources - allocate I/O Rx resources (Descriptors)
 331  * @adapter: network interface device structure
 332  * @qid: queue index
 333  *
 334  * Returns 0 on success, negative on failure
 335  */
 336 static int ena_setup_rx_resources(struct ena_adapter *adapter,
 337                                   u32 qid)
 338 {
 339         struct ena_ring *rx_ring = &adapter->rx_ring[qid];
 340         struct ena_irq *ena_irq = &adapter->irq_tbl[ENA_IO_IRQ_IDX(qid)];
 341         int size, node, i;
 342
 343         if (rx_ring->rx_buffer_info) {
 344                 netif_err(adapter, ifup, adapter->netdev,
 345                           "rx_buffer_info is not NULL");
 346                 return -EEXIST;
 347         }
 348
 349         /* alloc extra element so in rx path
 350          * we can always prefetch rx_info + 1
 351          */
 352         size = sizeof(struct ena_rx_buffer) * (rx_ring->ring_size + 1);
 353         node = cpu_to_node(ena_irq->cpu);
 354
 355         rx_ring->rx_buffer_info = vzalloc_node(size, node);
 356         if (!rx_ring->rx_buffer_info) {
 357                 rx_ring->rx_buffer_info = vzalloc(size);
 358                 if (!rx_ring->rx_buffer_info)
 359                         return -ENOMEM;
 360         }
 361
 362         size = sizeof(u16) * rx_ring->ring_size;
 363         rx_ring->free_rx_ids = vzalloc_node(size, node);
 364         if (!rx_ring->free_rx_ids) {
 365                 rx_ring->free_rx_ids = vzalloc(size);
 366                 if (!rx_ring->free_rx_ids) {
 367                         vfree(rx_ring->rx_buffer_info);
 368                         return -ENOMEM;
 369                 }
 370         }
 371
 372         /* Req id ring for receiving RX pkts out of order */
 373         for (i = 0; i < rx_ring->ring_size; i++)
 374                 rx_ring->free_rx_ids[i] = i;
 375
 376         /* Reset rx statistics */
 377         memset(&rx_ring->rx_stats, 0x0, sizeof(rx_ring->rx_stats));
 378
 379         rx_ring->next_to_clean = 0;
 380         rx_ring->next_to_use = 0;
 381         rx_ring->cpu = ena_irq->cpu;
 382
 383         return 0;
 384 }
 385
 386 /* ena_free_rx_resources - Free I/O Rx Resources
 387  * @adapter: network interface device structure
 388  * @qid: queue index
 389  *
 390  * Free all receive software resources
 391  */
 392 static void ena_free_rx_resources(struct ena_adapter *adapter,
 393                                   u32 qid)
 394 {
 395         struct ena_ring *rx_ring = &adapter->rx_ring[qid];
 396
 397         vfree(rx_ring->rx_buffer_info);
 398         rx_ring->rx_buffer_info = NULL;
 399
 400         vfree(rx_ring->free_rx_ids);
 401         rx_ring->free_rx_ids = NULL;
 402 }
 403
 404 /* ena_setup_all_rx_resources - allocate I/O Rx queues resources for all queues
 405  * @adapter: board private structure
 406  *
 407  * Return 0 on success, negative on failure
 408  */
 409 static int ena_setup_all_rx_resources(struct ena_adapter *adapter)
 410 {
 411         int i, rc = 0;
 412
 413         for (i = 0; i < adapter->num_queues; i++) {
 414                 rc = ena_setup_rx_resources(adapter, i);
 415                 if (rc)
 416                         goto err_setup_rx;
 417         }
 418
 419         return 0;
 420
 421 err_setup_rx:
 422
 423         netif_err(adapter, ifup, adapter->netdev,
 424                   "Rx queue %d: allocation failed\n", i);
 425
 426         /* rewind the index freeing the rings as we go */
 427         while (i--)
 428                 ena_free_rx_resources(adapter, i);
 429         return rc;
 430 }
 431
 432 /* ena_free_all_io_rx_resources - Free I/O Rx Resources for All Queues
 433  * @adapter: board private structure
 434  *
 435  * Free all receive software resources
 436  */
 437 static void ena_free_all_io_rx_resources(struct ena_adapter *adapter)
 438 {
 439         int i;
 440
 441         for (i = 0; i < adapter->num_queues; i++)
 442                 ena_free_rx_resources(adapter, i);
 443 }
 444
 445 static inline int ena_alloc_rx_page(struct ena_ring *rx_ring,
 446                                     struct ena_rx_buffer *rx_info, gfp_t gfp)
 447 {
 448         struct ena_com_buf *ena_buf;
 449         struct page *page;
 450         dma_addr_t dma;
 451
 452         /* if previous allocated page is not used */
 453         if (unlikely(rx_info->page))
 454                 return 0;
 455
 456         page = alloc_page(gfp);
 457         if (unlikely(!page)) {
 458                 u64_stats_update_begin(&rx_ring->syncp);
 459                 rx_ring->rx_stats.page_alloc_fail++;
 460                 u64_stats_update_end(&rx_ring->syncp);
 461                 return -ENOMEM;
 462         }
 463
 464         dma = dma_map_page(rx_ring->dev, page, 0, ENA_PAGE_SIZE,
 465                            DMA_FROM_DEVICE);
 466         if (unlikely(dma_mapping_error(rx_ring->dev, dma))) {
 467                 u64_stats_update_begin(&rx_ring->syncp);
 468                 rx_ring->rx_stats.dma_mapping_err++;
 469                 u64_stats_update_end(&rx_ring->syncp);
 470
 471                 __free_page(page);
 472                 return -EIO;
 473         }
 474         netif_dbg(rx_ring->adapter, rx_status, rx_ring->netdev,
 475                   "alloc page %p, rx_info %p\n", page, rx_info);
 476
 477         rx_info->page = page;
 478         rx_info->page_offset = 0;
 479         ena_buf = &rx_info->ena_buf;
 480         ena_buf->paddr = dma;
 481         ena_buf->len = ENA_PAGE_SIZE;
 482
 483         return 0;
 484 }
 485
 486 static void ena_free_rx_page(struct ena_ring *rx_ring,
 487                              struct ena_rx_buffer *rx_info)
 488 {
 489         struct page *page = rx_info->page;
 490         struct ena_com_buf *ena_buf = &rx_info->ena_buf;
 491
 492         if (unlikely(!page)) {
 493                 netif_warn(rx_ring->adapter, rx_err, rx_ring->netdev,
 494                            "Trying to free unallocated buffer\n");
 495                 return;
 496         }
 497
 498         dma_unmap_page(rx_ring->dev, ena_buf->paddr, ENA_PAGE_SIZE,
 499                        DMA_FROM_DEVICE);
 500
 501         __free_page(page);
 502         rx_info->page = NULL;
 503 }
 504
 505 static int ena_refill_rx_bufs(struct ena_ring *rx_ring, u32 num)
 506 {
 507         u16 next_to_use, req_id;
 508         u32 i;
 509         int rc;
 510
 511         next_to_use = rx_ring->next_to_use;
 512
 513         for (i = 0; i < num; i++) {
 514                 struct ena_rx_buffer *rx_info;
 515
 516                 req_id = rx_ring->free_rx_ids[next_to_use];
 517                 rc = validate_rx_req_id(rx_ring, req_id);
 518                 if (unlikely(rc < 0))
 519                         break;
 520
 521                 rx_info = &rx_ring->rx_buffer_info[req_id];
 522
 523
 524                 rc = ena_alloc_rx_page(rx_ring, rx_info,
 525                                        GFP_ATOMIC | __GFP_COMP);
 526                 if (unlikely(rc < 0)) {
 527                         netif_warn(rx_ring->adapter, rx_err, rx_ring->netdev,
 528                                    "failed to alloc buffer for rx queue %d\n",
 529                                    rx_ring->qid);
 530                         break;
 531                 }
 532                 rc = ena_com_add_single_rx_desc(rx_ring->ena_com_io_sq,
 533                                                 &rx_info->ena_buf,
 534                                                 req_id);
 535                 if (unlikely(rc)) {
 536                         netif_warn(rx_ring->adapter, rx_status, rx_ring->netdev,
 537                                    "failed to add buffer for rx queue %d\n",
 538                                    rx_ring->qid);
 539                         break;
 540                 }
 541                 next_to_use = ENA_RX_RING_IDX_NEXT(next_to_use,
 542                                                    rx_ring->ring_size);
 543         }
 544
 545         if (unlikely(i < num)) {
 546                 u64_stats_update_begin(&rx_ring->syncp);
 547                 rx_ring->rx_stats.refil_partial++;
 548                 u64_stats_update_end(&rx_ring->syncp);
 549                 netdev_warn(rx_ring->netdev,
 550                             "refilled rx qid %d with only %d buffers (from %d)\n",
 551                             rx_ring->qid, i, num);
 552         }
 553
 554         /* ena_com_write_sq_doorbell issues a wmb() */
 555         if (likely(i))
 556                 ena_com_write_sq_doorbell(rx_ring->ena_com_io_sq);
 557
 558         rx_ring->next_to_use = next_to_use;
 559
 560         return i;
 561 }
 562
 563 static void ena_free_rx_bufs(struct ena_adapter *adapter,
 564                              u32 qid)
 565 {
 566         struct ena_ring *rx_ring = &adapter->rx_ring[qid];
 567         u32 i;
 568
 569         for (i = 0; i < rx_ring->ring_size; i++) {
 570                 struct ena_rx_buffer *rx_info = &rx_ring->rx_buffer_info[i];
 571
 572                 if (rx_info->page)
 573                         ena_free_rx_page(rx_ring, rx_info);
 574         }
 575 }
 576
 577 /* ena_refill_all_rx_bufs - allocate all queues Rx buffers
 578  * @adapter: board private structure
 579  *
 580  */
 581 static void ena_refill_all_rx_bufs(struct ena_adapter *adapter)
 582 {
 583         struct ena_ring *rx_ring;
 584         int i, rc, bufs_num;
 585
 586         for (i = 0; i < adapter->num_queues; i++) {
 587                 rx_ring = &adapter->rx_ring[i];
 588                 bufs_num = rx_ring->ring_size - 1;
 589                 rc = ena_refill_rx_bufs(rx_ring, bufs_num);
 590
 591                 if (unlikely(rc != bufs_num))
 592                         netif_warn(rx_ring->adapter, rx_status, rx_ring->netdev,
 593                                    "refilling Queue %d failed. allocated %d buffers from: %d\n",
 594                                    i, rc, bufs_num);
 595         }
 596 }
 597
 598 static void ena_free_all_rx_bufs(struct ena_adapter *adapter)
 599 {
 600         int i;
 601
 602         for (i = 0; i < adapter->num_queues; i++)
 603                 ena_free_rx_bufs(adapter, i);
 604 }
 605
 606 /* ena_free_tx_bufs - Free Tx Buffers per Queue
 607  * @tx_ring: TX ring for which buffers be freed
 608  */
 609 static void ena_free_tx_bufs(struct ena_ring *tx_ring)
 610 {
 611         bool print_once = true;
 612         u32 i;
 613
 614         for (i = 0; i < tx_ring->ring_size; i++) {
 615                 struct ena_tx_buffer *tx_info = &tx_ring->tx_buffer_info[i];
 616                 struct ena_com_buf *ena_buf;
 617                 int nr_frags;
 618                 int j;
 619
 620                 if (!tx_info->skb)
 621                         continue;
 622
 623                 if (print_once) {
 624                         netdev_notice(tx_ring->netdev,
 625                                       "free uncompleted tx skb qid %d idx 0x%x\n",
 626                                       tx_ring->qid, i);
 627                         print_once = false;
 628                 } else {
 629                         netdev_dbg(tx_ring->netdev,
 630                                    "free uncompleted tx skb qid %d idx 0x%x\n",
 631                                    tx_ring->qid, i);
 632                 }
 633
 634                 ena_buf = tx_info->bufs;
 635                 dma_unmap_single(tx_ring->dev,
 636                                  ena_buf->paddr,
 637                                  ena_buf->len,
 638                                  DMA_TO_DEVICE);
 639
 640                 /* unmap remaining mapped pages */
 641                 nr_frags = tx_info->num_of_bufs - 1;
 642                 for (j = 0; j < nr_frags; j++) {
 643                         ena_buf++;
 644                         dma_unmap_page(tx_ring->dev,
 645                                        ena_buf->paddr,
 646                                        ena_buf->len,
 647                                        DMA_TO_DEVICE);
 648                 }
 649
 650                 dev_kfree_skb_any(tx_info->skb);
 651         }
 652         netdev_tx_reset_queue(netdev_get_tx_queue(tx_ring->netdev,
 653                                                   tx_ring->qid));
 654 }
 655
 656 static void ena_free_all_tx_bufs(struct ena_adapter *adapter)
 657 {
 658         struct ena_ring *tx_ring;
 659         int i;
 660
 661         for (i = 0; i < adapter->num_queues; i++) {
 662                 tx_ring = &adapter->tx_ring[i];
 663                 ena_free_tx_bufs(tx_ring);
 664         }
 665 }
 666
 667 static void ena_destroy_all_tx_queues(struct ena_adapter *adapter)
 668 {
 669         u16 ena_qid;
 670         int i;
 671
 672         for (i = 0; i < adapter->num_queues; i++) {
 673                 ena_qid = ENA_IO_TXQ_IDX(i);
 674                 ena_com_destroy_io_queue(adapter->ena_dev, ena_qid);
 675         }
 676 }
 677
 678 static void ena_destroy_all_rx_queues(struct ena_adapter *adapter)
 679 {
 680         u16 ena_qid;
 681         int i;
 682
 683         for (i = 0; i < adapter->num_queues; i++) {
 684                 ena_qid = ENA_IO_RXQ_IDX(i);
 685                 ena_com_destroy_io_queue(adapter->ena_dev, ena_qid);
 686         }
 687 }
 688
 689 static void ena_destroy_all_io_queues(struct ena_adapter *adapter)
 690 {
 691         ena_destroy_all_tx_queues(adapter);
 692         ena_destroy_all_rx_queues(adapter);
 693 }
 694
 695 static int validate_tx_req_id(struct ena_ring *tx_ring, u16 req_id)
 696 {
 697         struct ena_tx_buffer *tx_info = NULL;
 698
 699         if (likely(req_id < tx_ring->ring_size)) {
 700                 tx_info = &tx_ring->tx_buffer_info[req_id];
 701                 if (likely(tx_info->skb))
 702                         return 0;
 703         }
 704
 705         if (tx_info)
 706                 netif_err(tx_ring->adapter, tx_done, tx_ring->netdev,
 707                           "tx_info doesn't have valid skb\n");
 708         else
 709                 netif_err(tx_ring->adapter, tx_done, tx_ring->netdev,
 710                           "Invalid req_id: %hu\n", req_id);
 711
 712         u64_stats_update_begin(&tx_ring->syncp);
 713         tx_ring->tx_stats.bad_req_id++;
 714         u64_stats_update_end(&tx_ring->syncp);
 715
 716         /* Trigger device reset */
 717         tx_ring->adapter->reset_reason = ENA_REGS_RESET_INV_TX_REQ_ID;
 718         set_bit(ENA_FLAG_TRIGGER_RESET, &tx_ring->adapter->flags);
 719         return -EFAULT;
 720 }
 721
 722 static int ena_clean_tx_irq(struct ena_ring *tx_ring, u32 budget)
 723 {
 724         struct netdev_queue *txq;
 725         bool above_thresh;
 726         u32 tx_bytes = 0;
 727         u32 total_done = 0;
 728         u16 next_to_clean;
 729         u16 req_id;
 730         int tx_pkts = 0;
 731         int rc;
 732
 733         next_to_clean = tx_ring->next_to_clean;
 734         txq = netdev_get_tx_queue(tx_ring->netdev, tx_ring->qid);
 735
 736         while (tx_pkts < budget) {
 737                 struct ena_tx_buffer *tx_info;
 738                 struct sk_buff *skb;
 739                 struct ena_com_buf *ena_buf;
 740                 int i, nr_frags;
 741
 742                 rc = ena_com_tx_comp_req_id_get(tx_ring->ena_com_io_cq,
 743                                                 &req_id);
 744                 if (rc)
 745                         break;
 746
 747                 rc = validate_tx_req_id(tx_ring, req_id);
 748                 if (rc)
 749                         break;
 750
 751                 tx_info = &tx_ring->tx_buffer_info[req_id];
 752                 skb = tx_info->skb;
 753
 754                 /* prefetch skb_end_pointer() to speedup skb_shinfo(skb) */
 755                 prefetch(&skb->end);
 756
 757                 tx_info->skb = NULL;
 758                 tx_info->last_jiffies = 0;
 759
 760                 if (likely(tx_info->num_of_bufs != 0)) {
 761                         ena_buf = tx_info->bufs;
 762
 763                         dma_unmap_single(tx_ring->dev,
 764                                          dma_unmap_addr(ena_buf, paddr),
 765                                          dma_unmap_len(ena_buf, len),
 766                                          DMA_TO_DEVICE);
 767
 768                         /* unmap remaining mapped pages */
 769                         nr_frags = tx_info->num_of_bufs - 1;
 770                         for (i = 0; i < nr_frags; i++) {
 771                                 ena_buf++;
 772                                 dma_unmap_page(tx_ring->dev,
 773                                                dma_unmap_addr(ena_buf, paddr),
 774                                                dma_unmap_len(ena_buf, len),
 775                                                DMA_TO_DEVICE);
 776                         }
 777                 }
 778
 779                 netif_dbg(tx_ring->adapter, tx_done, tx_ring->netdev,
 780                           "tx_poll: q %d skb %p completed\n", tx_ring->qid,
 781                           skb);
 782
 783                 tx_bytes += skb->len;
 784                 dev_kfree_skb(skb);
 785                 tx_pkts++;
 786                 total_done += tx_info->tx_descs;
 787
 788                 tx_ring->free_tx_ids[next_to_clean] = req_id;
 789                 next_to_clean = ENA_TX_RING_IDX_NEXT(next_to_clean,
 790                                                      tx_ring->ring_size);
 791         }
 792
 793         tx_ring->next_to_clean = next_to_clean;
 794         ena_com_comp_ack(tx_ring->ena_com_io_sq, total_done);
 795         ena_com_update_dev_comp_head(tx_ring->ena_com_io_cq);
 796
 797         netdev_tx_completed_queue(txq, tx_pkts, tx_bytes);
 798
 799         netif_dbg(tx_ring->adapter, tx_done, tx_ring->netdev,
 800                   "tx_poll: q %d done. total pkts: %d\n",
 801                   tx_ring->qid, tx_pkts);
 802
 803         /* need to make the rings circular update visible to
 804          * ena_start_xmit() before checking for netif_queue_stopped().
 805          */
 806         smp_mb();
 807
 808         above_thresh = ena_com_sq_empty_space(tx_ring->ena_com_io_sq) >
 809                 ENA_TX_WAKEUP_THRESH;
 810         if (unlikely(netif_tx_queue_stopped(txq) && above_thresh)) {
 811                 __netif_tx_lock(txq, smp_processor_id());
 812                 above_thresh = ena_com_sq_empty_space(tx_ring->ena_com_io_sq) >
 813                         ENA_TX_WAKEUP_THRESH;
 814                 if (netif_tx_queue_stopped(txq) && above_thresh) {
 815                         netif_tx_wake_queue(txq);
 816                         u64_stats_update_begin(&tx_ring->syncp);
 817                         tx_ring->tx_stats.queue_wakeup++;
 818                         u64_stats_update_end(&tx_ring->syncp);
 819                 }
 820                 __netif_tx_unlock(txq);
 821         }
 822
 823         tx_ring->per_napi_bytes += tx_bytes;
 824         tx_ring->per_napi_packets += tx_pkts;
 825
 826         return tx_pkts;
 827 }
 828
 829 static struct sk_buff *ena_alloc_skb(struct ena_ring *rx_ring, bool frags)
 830 {
 831         struct sk_buff *skb;
 832
 833         if (frags)
 834                 skb = napi_get_frags(rx_ring->napi);
 835         else
 836                 skb = netdev_alloc_skb_ip_align(rx_ring->netdev,
 837                                                 rx_ring->rx_copybreak);
 838
 839         if (unlikely(!skb)) {
 840                 u64_stats_update_begin(&rx_ring->syncp);
 841                 rx_ring->rx_stats.skb_alloc_fail++;
 842                 u64_stats_update_end(&rx_ring->syncp);
 843                 netif_dbg(rx_ring->adapter, rx_err, rx_ring->netdev,
 844                           "Failed to allocate skb. frags: %d\n", frags);
 845                 return NULL;
 846         }
 847
 848         return skb;
 849 }
 850
 851 static struct sk_buff *ena_rx_skb(struct ena_ring *rx_ring,
 852                                   struct ena_com_rx_buf_info *ena_bufs,
 853                                   u32 descs,
 854                                   u16 *next_to_clean)
 855 {
 856         struct sk_buff *skb;
 857         struct ena_rx_buffer *rx_info;
 858         u16 len, req_id, buf = 0;
 859         void *va;
 860
 861         len = ena_bufs[buf].len;
 862         req_id = ena_bufs[buf].req_id;
 863         rx_info = &rx_ring->rx_buffer_info[req_id];
 864
 865         if (unlikely(!rx_info->page)) {
 866                 netif_err(rx_ring->adapter, rx_err, rx_ring->netdev,
 867                           "Page is NULL\n");
 868                 return NULL;
 869         }
 870
 871         netif_dbg(rx_ring->adapter, rx_status, rx_ring->netdev,
 872                   "rx_info %p page %p\n",
 873                   rx_info, rx_info->page);
 874
 875         /* save virt address of first buffer */
 876         va = page_address(rx_info->page) + rx_info->page_offset;
 877         prefetch(va + NET_IP_ALIGN);
 878
 879         if (len <= rx_ring->rx_copybreak) {
 880                 skb = ena_alloc_skb(rx_ring, false);
 881                 if (unlikely(!skb))
 882                         return NULL;
 883
 884                 netif_dbg(rx_ring->adapter, rx_status, rx_ring->netdev,
 885                           "rx allocated small packet. len %d. data_len %d\n",
 886                           skb->len, skb->data_len);
 887
 888                 /* sync this buffer for CPU use */
 889                 dma_sync_single_for_cpu(rx_ring->dev,
 890                                         dma_unmap_addr(&rx_info->ena_buf, paddr),
 891                                         len,
 892                                         DMA_FROM_DEVICE);
 893                 skb_copy_to_linear_data(skb, va, len);
 894                 dma_sync_single_for_device(rx_ring->dev,
 895                                            dma_unmap_addr(&rx_info->ena_buf, paddr),
 896                                            len,
 897                                            DMA_FROM_DEVICE);
 898
 899                 skb_put(skb, len);
 900                 skb->protocol = eth_type_trans(skb, rx_ring->netdev);
 901                 rx_ring->free_rx_ids[*next_to_clean] = req_id;
 902                 *next_to_clean = ENA_RX_RING_IDX_ADD(*next_to_clean, descs,
 903                                                      rx_ring->ring_size);
 904                 return skb;
 905         }
 906
 907         skb = ena_alloc_skb(rx_ring, true);
 908         if (unlikely(!skb))
 909                 return NULL;
 910
 911         do {
 912                 dma_unmap_page(rx_ring->dev,
 913                                dma_unmap_addr(&rx_info->ena_buf, paddr),
 914                                ENA_PAGE_SIZE, DMA_FROM_DEVICE);
 915
 916                 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, rx_info->page,
 917                                 rx_info->page_offset, len, ENA_PAGE_SIZE);
 918
 919                 netif_dbg(rx_ring->adapter, rx_status, rx_ring->netdev,
 920                           "rx skb updated. len %d. data_len %d\n",
 921                           skb->len, skb->data_len);
 922
 923                 rx_info->page = NULL;
 924
 925                 rx_ring->free_rx_ids[*next_to_clean] = req_id;
 926                 *next_to_clean =
 927                         ENA_RX_RING_IDX_NEXT(*next_to_clean,
 928                                              rx_ring->ring_size);
 929                 if (likely(--descs == 0))
 930                         break;
 931
 932                 buf++;
 933                 len = ena_bufs[buf].len;
 934                 req_id = ena_bufs[buf].req_id;
 935                 rx_info = &rx_ring->rx_buffer_info[req_id];
 936         } while (1);
 937
 938         return skb;
 939 }
 940
 941 /* ena_rx_checksum - indicate in skb if hw indicated a good cksum
 942  * @adapter: structure containing adapter specific data
 943  * @ena_rx_ctx: received packet context/metadata
 944  * @skb: skb currently being received and modified
 945  */
 946 static inline void ena_rx_checksum(struct ena_ring *rx_ring,
 947                                    struct ena_com_rx_ctx *ena_rx_ctx,
 948                                    struct sk_buff *skb)
 949 {
 950         /* Rx csum disabled */
 951         if (unlikely(!(rx_ring->netdev->features & NETIF_F_RXCSUM))) {
 952                 skb->ip_summed = CHECKSUM_NONE;
 953                 return;
 954         }
 955
 956         /* For fragmented packets the checksum isn't valid */
 957         if (ena_rx_ctx->frag) {
 958                 skb->ip_summed = CHECKSUM_NONE;
 959                 return;
 960         }
 961
 962         /* if IP and error */
 963         if (unlikely((ena_rx_ctx->l3_proto == ENA_ETH_IO_L3_PROTO_IPV4) &&
 964                      (ena_rx_ctx->l3_csum_err))) {
 965                 /* ipv4 checksum error */
 966                 skb->ip_summed = CHECKSUM_NONE;
 967                 u64_stats_update_begin(&rx_ring->syncp);
 968                 rx_ring->rx_stats.bad_csum++;
 969                 u64_stats_update_end(&rx_ring->syncp);
 970                 netif_dbg(rx_ring->adapter, rx_err, rx_ring->netdev,
 971                           "RX IPv4 header checksum error\n");
 972                 return;
 973         }
 974
 975         /* if TCP/UDP */
 976         if (likely((ena_rx_ctx->l4_proto == ENA_ETH_IO_L4_PROTO_TCP) ||
 977                    (ena_rx_ctx->l4_proto == ENA_ETH_IO_L4_PROTO_UDP))) {
 978                 if (unlikely(ena_rx_ctx->l4_csum_err)) {
 979                         /* TCP/UDP checksum error */
 980                         u64_stats_update_begin(&rx_ring->syncp);
 981                         rx_ring->rx_stats.bad_csum++;
 982                         u64_stats_update_end(&rx_ring->syncp);
 983                         netif_dbg(rx_ring->adapter, rx_err, rx_ring->netdev,
 984                                   "RX L4 checksum error\n");
 985                         skb->ip_summed = CHECKSUM_NONE;
 986                         return;
 987                 }
 988
 989                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 990         }
 991 }
 992
 993 static void ena_set_rx_hash(struct ena_ring *rx_ring,
 994                             struct ena_com_rx_ctx *ena_rx_ctx,
 995                             struct sk_buff *skb)
 996 {
 997         enum pkt_hash_types hash_type;
 998
 999         if (likely(rx_ring->netdev->features & NETIF_F_RXHASH)) {
1000                 if (likely((ena_rx_ctx->l4_proto == ENA_ETH_IO_L4_PROTO_TCP) ||
1001                            (ena_rx_ctx->l4_proto == ENA_ETH_IO_L4_PROTO_UDP)))
1002
1003                         hash_type = PKT_HASH_TYPE_L4;
1004                 else
1005                         hash_type = PKT_HASH_TYPE_NONE;
1006
1007                 /* Override hash type if the packet is fragmented */
1008                 if (ena_rx_ctx->frag)
1009                         hash_type = PKT_HASH_TYPE_NONE;
1010
1011                 skb_set_hash(skb, ena_rx_ctx->hash, hash_type);
1012         }
1013 }
1014
1015 /* ena_clean_rx_irq - Cleanup RX irq
1016  * @rx_ring: RX ring to clean
1017  * @napi: napi handler
1018  * @budget: how many packets driver is allowed to clean
1019  *
1020  * Returns the number of cleaned buffers.
1021  */
1022 static int ena_clean_rx_irq(struct ena_ring *rx_ring, struct napi_struct *napi,
1023                             u32 budget)
1024 {
1025         u16 next_to_clean = rx_ring->next_to_clean;
1026         u32 res_budget, work_done;
1027
1028         struct ena_com_rx_ctx ena_rx_ctx;
1029         struct ena_adapter *adapter;
1030         struct sk_buff *skb;
1031         int refill_required;
1032         int refill_threshold;
1033         int rc = 0;
1034         int total_len = 0;
1035         int rx_copybreak_pkt = 0;
1036         int i;
1037
1038         netif_dbg(rx_ring->adapter, rx_status, rx_ring->netdev,
1039                   "%s qid %d\n", __func__, rx_ring->qid);
1040         res_budget = budget;
1041
1042         do {
1043                 ena_rx_ctx.ena_bufs = rx_ring->ena_bufs;
1044                 ena_rx_ctx.max_bufs = rx_ring->sgl_size;
1045                 ena_rx_ctx.descs = 0;
1046                 rc = ena_com_rx_pkt(rx_ring->ena_com_io_cq,
1047                                     rx_ring->ena_com_io_sq,
1048                                     &ena_rx_ctx);
1049                 if (unlikely(rc))
1050                         goto error;
1051
1052                 if (unlikely(ena_rx_ctx.descs == 0))
1053                         break;
1054
1055                 netif_dbg(rx_ring->adapter, rx_status, rx_ring->netdev,
1056                           "rx_poll: q %d got packet from ena. descs #: %d l3 proto %d l4 proto %d hash: %x\n",
1057                           rx_ring->qid, ena_rx_ctx.descs, ena_rx_ctx.l3_proto,
1058                           ena_rx_ctx.l4_proto, ena_rx_ctx.hash);
1059
1060                 /* allocate skb and fill it */
1061                 skb = ena_rx_skb(rx_ring, rx_ring->ena_bufs, ena_rx_ctx.descs,
1062                                  &next_to_clean);
1063
1064                 /* exit if we failed to retrieve a buffer */
1065                 if (unlikely(!skb)) {
1066                         for (i = 0; i < ena_rx_ctx.descs; i++) {
1067                                 rx_ring->free_tx_ids[next_to_clean] =
1068                                         rx_ring->ena_bufs[i].req_id;
1069                                 next_to_clean =
1070                                         ENA_RX_RING_IDX_NEXT(next_to_clean,
1071                                                              rx_ring->ring_size);
1072                         }
1073                         break;
1074                 }
1075
1076                 ena_rx_checksum(rx_ring, &ena_rx_ctx, skb);
1077
1078                 ena_set_rx_hash(rx_ring, &ena_rx_ctx, skb);
1079
1080                 skb_record_rx_queue(skb, rx_ring->qid);
1081
1082                 if (rx_ring->ena_bufs[0].len <= rx_ring->rx_copybreak) {
1083                         total_len += rx_ring->ena_bufs[0].len;
1084                         rx_copybreak_pkt++;
1085                         napi_gro_receive(napi, skb);
1086                 } else {
1087                         total_len += skb->len;
1088                         napi_gro_frags(napi);
1089                 }
1090
1091                 res_budget--;
1092         } while (likely(res_budget));
1093
1094         work_done = budget - res_budget;
1095         rx_ring->per_napi_bytes += total_len;
1096         rx_ring->per_napi_packets += work_done;
1097         u64_stats_update_begin(&rx_ring->syncp);
1098         rx_ring->rx_stats.bytes += total_len;
1099         rx_ring->rx_stats.cnt += work_done;
1100         rx_ring->rx_stats.rx_copybreak_pkt += rx_copybreak_pkt;
1101         u64_stats_update_end(&rx_ring->syncp);
1102
1103         rx_ring->next_to_clean = next_to_clean;
1104
1105         refill_required = ena_com_sq_empty_space(rx_ring->ena_com_io_sq);
1106         refill_threshold = rx_ring->ring_size / ENA_RX_REFILL_THRESH_DIVIDER;
1107
1108         /* Optimization, try to batch new rx buffers */
1109         if (refill_required > refill_threshold) {
1110                 ena_com_update_dev_comp_head(rx_ring->ena_com_io_cq);
1111                 ena_refill_rx_bufs(rx_ring, refill_required);
1112         }
1113
1114         return work_done;
1115
1116 error:
1117         adapter = netdev_priv(rx_ring->netdev);
1118
1119         u64_stats_update_begin(&rx_ring->syncp);
1120         rx_ring->rx_stats.bad_desc_num++;
1121         u64_stats_update_end(&rx_ring->syncp);
1122
1123         /* Too many desc from the device. Trigger reset */
1124         adapter->reset_reason = ENA_REGS_RESET_TOO_MANY_RX_DESCS;
1125         set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
1126
1127         return 0;
1128 }
1129
1130 inline void ena_adjust_intr_moderation(struct ena_ring *rx_ring,
1131                                        struct ena_ring *tx_ring)
1132 {
1133         /* We apply adaptive moderation on Rx path only.
1134          * Tx uses static interrupt moderation.
1135          */
1136         ena_com_calculate_interrupt_delay(rx_ring->ena_dev,
1137                                           rx_ring->per_napi_packets,
1138                                           rx_ring->per_napi_bytes,
1139                                           &rx_ring->smoothed_interval,
1140                                           &rx_ring->moder_tbl_idx);
1141
1142         /* Reset per napi packets/bytes */
1143         tx_ring->per_napi_packets = 0;
1144         tx_ring->per_napi_bytes = 0;
1145         rx_ring->per_napi_packets = 0;
1146         rx_ring->per_napi_bytes = 0;
1147 }
1148
1149 static inline void ena_unmask_interrupt(struct ena_ring *tx_ring,
1150                                         struct ena_ring *rx_ring)
1151 {
1152         struct ena_eth_io_intr_reg intr_reg;
1153
1154         /* Update intr register: rx intr delay,
1155          * tx intr delay and interrupt unmask
1156          */
1157         ena_com_update_intr_reg(&intr_reg,
1158                                 rx_ring->smoothed_interval,
1159                                 tx_ring->smoothed_interval,
1160                                 true);
1161
1162         /* It is a shared MSI-X.
1163          * Tx and Rx CQ have pointer to it.
1164          * So we use one of them to reach the intr reg
1165          */
1166         ena_com_unmask_intr(rx_ring->ena_com_io_cq, &intr_reg);
1167 }
1168
1169 static inline void ena_update_ring_numa_node(struct ena_ring *tx_ring,
1170                                              struct ena_ring *rx_ring)
1171 {
1172         int cpu = get_cpu();
1173         int numa_node;
1174
1175         /* Check only one ring since the 2 rings are running on the same cpu */
1176         if (likely(tx_ring->cpu == cpu))
1177                 goto out;
1178
1179         numa_node = cpu_to_node(cpu);
1180         put_cpu();
1181
1182         if (numa_node != NUMA_NO_NODE) {
1183                 ena_com_update_numa_node(tx_ring->ena_com_io_cq, numa_node);
1184                 ena_com_update_numa_node(rx_ring->ena_com_io_cq, numa_node);
1185         }
1186
1187         tx_ring->cpu = cpu;
1188         rx_ring->cpu = cpu;
1189
1190         return;
1191 out:
1192         put_cpu();
1193 }
1194
1195 static int ena_io_poll(struct napi_struct *napi, int budget)
1196 {
1197         struct ena_napi *ena_napi = container_of(napi, struct ena_napi, napi);
1198         struct ena_ring *tx_ring, *rx_ring;
1199
1200         u32 tx_work_done;
1201         u32 rx_work_done;
1202         int tx_budget;
1203         int napi_comp_call = 0;
1204         int ret;
1205
1206         tx_ring = ena_napi->tx_ring;
1207         rx_ring = ena_napi->rx_ring;
1208
1209         tx_budget = tx_ring->ring_size / ENA_TX_POLL_BUDGET_DIVIDER;
1210
1211         if (!test_bit(ENA_FLAG_DEV_UP, &tx_ring->adapter->flags) ||
1212             test_bit(ENA_FLAG_TRIGGER_RESET, &tx_ring->adapter->flags)) {
1213                 napi_complete_done(napi, 0);
1214                 return 0;
1215         }
1216
1217         tx_work_done = ena_clean_tx_irq(tx_ring, tx_budget);
1218         rx_work_done = ena_clean_rx_irq(rx_ring, napi, budget);
1219
1220         /* If the device is about to reset or down, avoid unmask
1221          * the interrupt and return 0 so NAPI won't reschedule
1222          */
1223         if (unlikely(!test_bit(ENA_FLAG_DEV_UP, &tx_ring->adapter->flags) ||
1224                      test_bit(ENA_FLAG_TRIGGER_RESET, &tx_ring->adapter->flags))) {
1225                 napi_complete_done(napi, 0);
1226                 ret = 0;
1227
1228         } else if ((budget > rx_work_done) && (tx_budget > tx_work_done)) {
1229                 napi_comp_call = 1;
1230
1231                 /* Update numa and unmask the interrupt only when schedule
1232                  * from the interrupt context (vs from sk_busy_loop)
1233                  */
1234                 if (napi_complete_done(napi, rx_work_done)) {
1235                         /* Tx and Rx share the same interrupt vector */
1236                         if (ena_com_get_adaptive_moderation_enabled(rx_ring->ena_dev))
1237                                 ena_adjust_intr_moderation(rx_ring, tx_ring);
1238
1239                         ena_unmask_interrupt(tx_ring, rx_ring);
1240                 }
1241
1242                 ena_update_ring_numa_node(tx_ring, rx_ring);
1243
1244                 ret = rx_work_done;
1245         } else {
1246                 ret = budget;
1247         }
1248
1249         u64_stats_update_begin(&tx_ring->syncp);
1250         tx_ring->tx_stats.napi_comp += napi_comp_call;
1251         tx_ring->tx_stats.tx_poll++;
1252         u64_stats_update_end(&tx_ring->syncp);
1253
1254         return ret;
1255 }
1256
1257 static irqreturn_t ena_intr_msix_mgmnt(int irq, void *data)
1258 {
1259         struct ena_adapter *adapter = (struct ena_adapter *)data;
1260
1261         ena_com_admin_q_comp_intr_handler(adapter->ena_dev);
1262
1263         /* Don't call the aenq handler before probe is done */
1264         if (likely(test_bit(ENA_FLAG_DEVICE_RUNNING, &adapter->flags)))
1265                 ena_com_aenq_intr_handler(adapter->ena_dev, data);
1266
1267         return IRQ_HANDLED;
1268 }
1269
1270 /* ena_intr_msix_io - MSI-X Interrupt Handler for Tx/Rx
1271  * @irq: interrupt number
1272  * @data: pointer to a network interface private napi device structure
1273  */
1274 static irqreturn_t ena_intr_msix_io(int irq, void *data)
1275 {
1276         struct ena_napi *ena_napi = data;
1277
1278         ena_napi->tx_ring->first_interrupt = true;
1279         ena_napi->rx_ring->first_interrupt = true;
1280
1281         napi_schedule_irqoff(&ena_napi->napi);
1282
1283         return IRQ_HANDLED;
1284 }
1285
1286 /* Reserve a single MSI-X vector for management (admin + aenq).
1287  * plus reserve one vector for each potential io queue.
1288  * the number of potential io queues is the minimum of what the device
1289  * supports and the number of vCPUs.
1290  */
1291 static int ena_enable_msix(struct ena_adapter *adapter, int num_queues)
1292 {
1293         int msix_vecs, irq_cnt;
1294
1295         if (test_bit(ENA_FLAG_MSIX_ENABLED, &adapter->flags)) {
1296                 netif_err(adapter, probe, adapter->netdev,
1297                           "Error, MSI-X is already enabled\n");
1298                 return -EPERM;
1299         }
1300
1301         /* Reserved the max msix vectors we might need */
1302         msix_vecs = ENA_MAX_MSIX_VEC(num_queues);
1303
1304         netif_dbg(adapter, probe, adapter->netdev,
1305                   "trying to enable MSI-X, vectors %d\n", msix_vecs);
1306
1307         irq_cnt = pci_alloc_irq_vectors(adapter->pdev, ENA_MIN_MSIX_VEC,
1308                                         msix_vecs, PCI_IRQ_MSIX);
1309
1310         if (irq_cnt < 0) {
1311                 netif_err(adapter, probe, adapter->netdev,
1312                           "Failed to enable MSI-X. irq_cnt %d\n", irq_cnt);
1313                 return -ENOSPC;
1314         }
1315
1316         if (irq_cnt != msix_vecs) {
1317                 netif_notice(adapter, probe, adapter->netdev,
1318                              "enable only %d MSI-X (out of %d), reduce the number of queues\n",
1319                              irq_cnt, msix_vecs);
1320                 adapter->num_queues = irq_cnt - ENA_ADMIN_MSIX_VEC;
1321         }
1322
1323         if (ena_init_rx_cpu_rmap(adapter))
1324                 netif_warn(adapter, probe, adapter->netdev,
1325                            "Failed to map IRQs to CPUs\n");
1326
1327         adapter->msix_vecs = irq_cnt;
1328         set_bit(ENA_FLAG_MSIX_ENABLED, &adapter->flags);
1329
1330         return 0;
1331 }
1332
1333 static void ena_setup_mgmnt_intr(struct ena_adapter *adapter)
1334 {
1335         u32 cpu;
1336
1337         snprintf(adapter->irq_tbl[ENA_MGMNT_IRQ_IDX].name,
1338                  ENA_IRQNAME_SIZE, "ena-mgmnt@pci:%s",
1339                  pci_name(adapter->pdev));
1340         adapter->irq_tbl[ENA_MGMNT_IRQ_IDX].handler =
1341                 ena_intr_msix_mgmnt;
1342         adapter->irq_tbl[ENA_MGMNT_IRQ_IDX].data = adapter;
1343         adapter->irq_tbl[ENA_MGMNT_IRQ_IDX].vector =
1344                 pci_irq_vector(adapter->pdev, ENA_MGMNT_IRQ_IDX);
1345         cpu = cpumask_first(cpu_online_mask);
1346         adapter->irq_tbl[ENA_MGMNT_IRQ_IDX].cpu = cpu;
1347         cpumask_set_cpu(cpu,
1348                         &adapter->irq_tbl[ENA_MGMNT_IRQ_IDX].affinity_hint_mask);
1349 }
1350
1351 static void ena_setup_io_intr(struct ena_adapter *adapter)
1352 {
1353         struct net_device *netdev;
1354         int irq_idx, i, cpu;
1355
1356         netdev = adapter->netdev;
1357
1358         for (i = 0; i < adapter->num_queues; i++) {
1359                 irq_idx = ENA_IO_IRQ_IDX(i);
1360                 cpu = i % num_online_cpus();
1361
1362                 snprintf(adapter->irq_tbl[irq_idx].name, ENA_IRQNAME_SIZE,
1363                          "%s-Tx-Rx-%d", netdev->name, i);
1364                 adapter->irq_tbl[irq_idx].handler = ena_intr_msix_io;
1365                 adapter->irq_tbl[irq_idx].data = &adapter->ena_napi[i];
1366                 adapter->irq_tbl[irq_idx].vector =
1367                         pci_irq_vector(adapter->pdev, irq_idx);
1368                 adapter->irq_tbl[irq_idx].cpu = cpu;
1369
1370                 cpumask_set_cpu(cpu,
1371                                 &adapter->irq_tbl[irq_idx].affinity_hint_mask);
1372         }
1373 }
1374
1375 static int ena_request_mgmnt_irq(struct ena_adapter *adapter)
1376 {
1377         unsigned long flags = 0;
1378         struct ena_irq *irq;
1379         int rc;
1380
1381         irq = &adapter->irq_tbl[ENA_MGMNT_IRQ_IDX];
1382         rc = request_irq(irq->vector, irq->handler, flags, irq->name,
1383                          irq->data);
1384         if (rc) {
1385                 netif_err(adapter, probe, adapter->netdev,
1386                           "failed to request admin irq\n");
1387                 return rc;
1388         }
1389
1390         netif_dbg(adapter, probe, adapter->netdev,
1391                   "set affinity hint of mgmnt irq.to 0x%lx (irq vector: %d)\n",
1392                   irq->affinity_hint_mask.bits[0], irq->vector);
1393
1394         irq_set_affinity_hint(irq->vector, &irq->affinity_hint_mask);
1395
1396         return rc;
1397 }
1398
1399 static int ena_request_io_irq(struct ena_adapter *adapter)
1400 {
1401         unsigned long flags = 0;
1402         struct ena_irq *irq;
1403         int rc = 0, i, k;
1404
1405         if (!test_bit(ENA_FLAG_MSIX_ENABLED, &adapter->flags)) {
1406                 netif_err(adapter, ifup, adapter->netdev,
1407                           "Failed to request I/O IRQ: MSI-X is not enabled\n");
1408                 return -EINVAL;
1409         }
1410
1411         for (i = ENA_IO_IRQ_FIRST_IDX; i < adapter->msix_vecs; i++) {
1412                 irq = &adapter->irq_tbl[i];
1413                 rc = request_irq(irq->vector, irq->handler, flags, irq->name,
1414                                  irq->data);
1415                 if (rc) {
1416                         netif_err(adapter, ifup, adapter->netdev,
1417                                   "Failed to request I/O IRQ. index %d rc %d\n",
1418                                    i, rc);
1419                         goto err;
1420                 }
1421
1422                 netif_dbg(adapter, ifup, adapter->netdev,
1423                           "set affinity hint of irq. index %d to 0x%lx (irq vector: %d)\n",
1424                           i, irq->affinity_hint_mask.bits[0], irq->vector);
1425
1426                 irq_set_affinity_hint(irq->vector, &irq->affinity_hint_mask);
1427         }
1428
1429         return rc;
1430
1431 err:
1432         for (k = ENA_IO_IRQ_FIRST_IDX; k < i; k++) {
1433                 irq = &adapter->irq_tbl[k];
1434                 free_irq(irq->vector, irq->data);
1435         }
1436
1437         return rc;
1438 }
1439
1440 static void ena_free_mgmnt_irq(struct ena_adapter *adapter)
1441 {
1442         struct ena_irq *irq;
1443
1444         irq = &adapter->irq_tbl[ENA_MGMNT_IRQ_IDX];
1445         synchronize_irq(irq->vector);
1446         irq_set_affinity_hint(irq->vector, NULL);
1447         free_irq(irq->vector, irq->data);
1448 }
1449
1450 static void ena_free_io_irq(struct ena_adapter *adapter)
1451 {
1452         struct ena_irq *irq;
1453         int i;
1454
1455 #ifdef CONFIG_RFS_ACCEL
1456         if (adapter->msix_vecs >= 1) {
1457                 free_irq_cpu_rmap(adapter->netdev->rx_cpu_rmap);
1458                 adapter->netdev->rx_cpu_rmap = NULL;
1459         }
1460 #endif /* CONFIG_RFS_ACCEL */
1461
1462         for (i = ENA_IO_IRQ_FIRST_IDX; i < adapter->msix_vecs; i++) {
1463                 irq = &adapter->irq_tbl[i];
1464                 irq_set_affinity_hint(irq->vector, NULL);
1465                 free_irq(irq->vector, irq->data);
1466         }
1467 }
1468
1469 static void ena_disable_msix(struct ena_adapter *adapter)
1470 {
1471         if (test_and_clear_bit(ENA_FLAG_MSIX_ENABLED, &adapter->flags))
1472                 pci_free_irq_vectors(adapter->pdev);
1473 }
1474
1475 static void ena_disable_io_intr_sync(struct ena_adapter *adapter)
1476 {
1477         int i;
1478
1479         if (!netif_running(adapter->netdev))
1480                 return;
1481
1482         for (i = ENA_IO_IRQ_FIRST_IDX; i < adapter->msix_vecs; i++)
1483                 synchronize_irq(adapter->irq_tbl[i].vector);
1484 }
1485
1486 static void ena_del_napi(struct ena_adapter *adapter)
1487 {
1488         int i;
1489
1490         for (i = 0; i < adapter->num_queues; i++)
1491                 netif_napi_del(&adapter->ena_napi[i].napi);
1492 }
1493
1494 static void ena_init_napi(struct ena_adapter *adapter)
1495 {
1496         struct ena_napi *napi;
1497         int i;
1498
1499         for (i = 0; i < adapter->num_queues; i++) {
1500                 napi = &adapter->ena_napi[i];
1501
1502                 netif_napi_add(adapter->netdev,
1503                                &adapter->ena_napi[i].napi,
1504                                ena_io_poll,
1505                                ENA_NAPI_BUDGET);
1506                 napi->rx_ring = &adapter->rx_ring[i];
1507                 napi->tx_ring = &adapter->tx_ring[i];
1508                 napi->qid = i;
1509         }
1510 }
1511
1512 static void ena_napi_disable_all(struct ena_adapter *adapter)
1513 {
1514         int i;
1515
1516         for (i = 0; i < adapter->num_queues; i++)
1517                 napi_disable(&adapter->ena_napi[i].napi);
1518 }
1519
1520 static void ena_napi_enable_all(struct ena_adapter *adapter)
1521 {
1522         int i;
1523
1524         for (i = 0; i < adapter->num_queues; i++)
1525                 napi_enable(&adapter->ena_napi[i].napi);
1526 }
1527
1528 static void ena_restore_ethtool_params(struct ena_adapter *adapter)
1529 {
1530         adapter->tx_usecs = 0;
1531         adapter->rx_usecs = 0;
1532         adapter->tx_frames = 1;
1533         adapter->rx_frames = 1;
1534 }
1535
1536 /* Configure the Rx forwarding */
1537 static int ena_rss_configure(struct ena_adapter *adapter)
1538 {
1539         struct ena_com_dev *ena_dev = adapter->ena_dev;
1540         int rc;
1541
1542         /* In case the RSS table wasn't initialized by probe */
1543         if (!ena_dev->rss.tbl_log_size) {
1544                 rc = ena_rss_init_default(adapter);
1545                 if (rc && (rc != -EOPNOTSUPP)) {
1546                         netif_err(adapter, ifup, adapter->netdev,
1547                                   "Failed to init RSS rc: %d\n", rc);
1548                         return rc;
1549                 }
1550         }
1551
1552         /* Set indirect table */
1553         rc = ena_com_indirect_table_set(ena_dev);
1554         if (unlikely(rc && rc != -EOPNOTSUPP))
1555                 return rc;
1556
1557         /* Configure hash function (if supported) */
1558         rc = ena_com_set_hash_function(ena_dev);
1559         if (unlikely(rc && (rc != -EOPNOTSUPP)))
1560                 return rc;
1561
1562         /* Configure hash inputs (if supported) */
1563         rc = ena_com_set_hash_ctrl(ena_dev);
1564         if (unlikely(rc && (rc != -EOPNOTSUPP)))
1565                 return rc;
1566
1567         return 0;
1568 }
1569
1570 static int ena_up_complete(struct ena_adapter *adapter)
1571 {
1572         int rc;
1573
1574         rc = ena_rss_configure(adapter);
1575         if (rc)
1576                 return rc;
1577
1578         ena_init_napi(adapter);
1579
1580         ena_change_mtu(adapter->netdev, adapter->netdev->mtu);
1581
1582         ena_refill_all_rx_bufs(adapter);
1583
1584         /* enable transmits */
1585         netif_tx_start_all_queues(adapter->netdev);
1586
1587         ena_restore_ethtool_params(adapter);
1588
1589         ena_napi_enable_all(adapter);
1590
1591         return 0;
1592 }
1593
1594 static int ena_create_io_tx_queue(struct ena_adapter *adapter, int qid)
1595 {
1596         struct ena_com_create_io_ctx ctx = { 0 };
1597         struct ena_com_dev *ena_dev;
1598         struct ena_ring *tx_ring;
1599         u32 msix_vector;
1600         u16 ena_qid;
1601         int rc;
1602
1603         ena_dev = adapter->ena_dev;
1604
1605         tx_ring = &adapter->tx_ring[qid];
1606         msix_vector = ENA_IO_IRQ_IDX(qid);
1607         ena_qid = ENA_IO_TXQ_IDX(qid);
1608
1609         ctx.direction = ENA_COM_IO_QUEUE_DIRECTION_TX;
1610         ctx.qid = ena_qid;
1611         ctx.mem_queue_type = ena_dev->tx_mem_queue_type;
1612         ctx.msix_vector = msix_vector;
1613         ctx.queue_size = adapter->tx_ring_size;
1614         ctx.numa_node = cpu_to_node(tx_ring->cpu);
1615
1616         rc = ena_com_create_io_queue(ena_dev, &ctx);
1617         if (rc) {
1618                 netif_err(adapter, ifup, adapter->netdev,
1619                           "Failed to create I/O TX queue num %d rc: %d\n",
1620                           qid, rc);
1621                 return rc;
1622         }
1623
1624         rc = ena_com_get_io_handlers(ena_dev, ena_qid,
1625                                      &tx_ring->ena_com_io_sq,
1626                                      &tx_ring->ena_com_io_cq);
1627         if (rc) {
1628                 netif_err(adapter, ifup, adapter->netdev,
1629                           "Failed to get TX queue handlers. TX queue num %d rc: %d\n",
1630                           qid, rc);
1631                 ena_com_destroy_io_queue(ena_dev, ena_qid);
1632                 return rc;
1633         }
1634
1635         ena_com_update_numa_node(tx_ring->ena_com_io_cq, ctx.numa_node);
1636         return rc;
1637 }
1638
1639 static int ena_create_all_io_tx_queues(struct ena_adapter *adapter)
1640 {
1641         struct ena_com_dev *ena_dev = adapter->ena_dev;
1642         int rc, i;
1643
1644         for (i = 0; i < adapter->num_queues; i++) {
1645                 rc = ena_create_io_tx_queue(adapter, i);
1646                 if (rc)
1647                         goto create_err;
1648         }
1649
1650         return 0;
1651
1652 create_err:
1653         while (i--)
1654                 ena_com_destroy_io_queue(ena_dev, ENA_IO_TXQ_IDX(i));
1655
1656         return rc;
1657 }
1658
1659 static int ena_create_io_rx_queue(struct ena_adapter *adapter, int qid)
1660 {
1661         struct ena_com_dev *ena_dev;
1662         struct ena_com_create_io_ctx ctx = { 0 };
1663         struct ena_ring *rx_ring;
1664         u32 msix_vector;
1665         u16 ena_qid;
1666         int rc;
1667
1668         ena_dev = adapter->ena_dev;
1669
1670         rx_ring = &adapter->rx_ring[qid];
1671         msix_vector = ENA_IO_IRQ_IDX(qid);
1672         ena_qid = ENA_IO_RXQ_IDX(qid);
1673
1674         ctx.qid = ena_qid;
1675         ctx.direction = ENA_COM_IO_QUEUE_DIRECTION_RX;
1676         ctx.mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST;
1677         ctx.msix_vector = msix_vector;
1678         ctx.queue_size = adapter->rx_ring_size;
1679         ctx.numa_node = cpu_to_node(rx_ring->cpu);
1680
1681         rc = ena_com_create_io_queue(ena_dev, &ctx);
1682         if (rc) {
1683                 netif_err(adapter, ifup, adapter->netdev,
1684                           "Failed to create I/O RX queue num %d rc: %d\n",
1685                           qid, rc);
1686                 return rc;
1687         }
1688
1689         rc = ena_com_get_io_handlers(ena_dev, ena_qid,
1690                                      &rx_ring->ena_com_io_sq,
1691                                      &rx_ring->ena_com_io_cq);
1692         if (rc) {
1693                 netif_err(adapter, ifup, adapter->netdev,
1694                           "Failed to get RX queue handlers. RX queue num %d rc: %d\n",
1695                           qid, rc);
1696                 ena_com_destroy_io_queue(ena_dev, ena_qid);
1697                 return rc;
1698         }
1699
1700         ena_com_update_numa_node(rx_ring->ena_com_io_cq, ctx.numa_node);
1701
1702         return rc;
1703 }
1704
1705 static int ena_create_all_io_rx_queues(struct ena_adapter *adapter)
1706 {
1707         struct ena_com_dev *ena_dev = adapter->ena_dev;
1708         int rc, i;
1709
1710         for (i = 0; i < adapter->num_queues; i++) {
1711                 rc = ena_create_io_rx_queue(adapter, i);
1712                 if (rc)
1713                         goto create_err;
1714         }
1715
1716         return 0;
1717
1718 create_err:
1719         while (i--)
1720                 ena_com_destroy_io_queue(ena_dev, ENA_IO_RXQ_IDX(i));
1721
1722         return rc;
1723 }
1724
1725 static int ena_up(struct ena_adapter *adapter)
1726 {
1727         int rc, i;
1728
1729         netdev_dbg(adapter->netdev, "%s\n", __func__);
1730
1731         ena_setup_io_intr(adapter);
1732
1733         rc = ena_request_io_irq(adapter);
1734         if (rc)
1735                 goto err_req_irq;
1736
1737         /* allocate transmit descriptors */
1738         rc = ena_setup_all_tx_resources(adapter);
1739         if (rc)
1740                 goto err_setup_tx;
1741
1742         /* allocate receive descriptors */
1743         rc = ena_setup_all_rx_resources(adapter);
1744         if (rc)
1745                 goto err_setup_rx;
1746
1747         /* Create TX queues */
1748         rc = ena_create_all_io_tx_queues(adapter);
1749         if (rc)
1750                 goto err_create_tx_queues;
1751
1752         /* Create RX queues */
1753         rc = ena_create_all_io_rx_queues(adapter);
1754         if (rc)
1755                 goto err_create_rx_queues;
1756
1757         rc = ena_up_complete(adapter);
1758         if (rc)
1759                 goto err_up;
1760
1761         if (test_bit(ENA_FLAG_LINK_UP, &adapter->flags))
1762                 netif_carrier_on(adapter->netdev);
1763
1764         u64_stats_update_begin(&adapter->syncp);
1765         adapter->dev_stats.interface_up++;
1766         u64_stats_update_end(&adapter->syncp);
1767
1768         set_bit(ENA_FLAG_DEV_UP, &adapter->flags);
1769
1770         /* Enable completion queues interrupt */
1771         for (i = 0; i < adapter->num_queues; i++)
1772                 ena_unmask_interrupt(&adapter->tx_ring[i],
1773                                      &adapter->rx_ring[i]);
1774
1775         /* schedule napi in case we had pending packets
1776          * from the last time we disable napi
1777          */
1778         for (i = 0; i < adapter->num_queues; i++)
1779                 napi_schedule(&adapter->ena_napi[i].napi);
1780
1781         return rc;
1782
1783 err_up:
1784         ena_destroy_all_rx_queues(adapter);
1785 err_create_rx_queues:
1786         ena_destroy_all_tx_queues(adapter);
1787 err_create_tx_queues:
1788         ena_free_all_io_rx_resources(adapter);
1789 err_setup_rx:
1790         ena_free_all_io_tx_resources(adapter);
1791 err_setup_tx:
1792         ena_free_io_irq(adapter);
1793 err_req_irq:
1794
1795         return rc;
1796 }
1797
1798 static void ena_down(struct ena_adapter *adapter)
1799 {
1800         netif_info(adapter, ifdown, adapter->netdev, "%s\n", __func__);
1801
1802         clear_bit(ENA_FLAG_DEV_UP, &adapter->flags);
1803
1804         u64_stats_update_begin(&adapter->syncp);
1805         adapter->dev_stats.interface_down++;
1806         u64_stats_update_end(&adapter->syncp);
1807
1808         netif_carrier_off(adapter->netdev);
1809         netif_tx_disable(adapter->netdev);
1810
1811         /* After this point the napi handler won't enable the tx queue */
1812         ena_napi_disable_all(adapter);
1813
1814         /* After destroy the queue there won't be any new interrupts */
1815
1816         if (test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags)) {
1817                 int rc;
1818
1819                 rc = ena_com_dev_reset(adapter->ena_dev, adapter->reset_reason);
1820                 if (rc)
1821                         dev_err(&adapter->pdev->dev, "Device reset failed\n");
1822         }
1823
1824         ena_destroy_all_io_queues(adapter);
1825
1826         ena_disable_io_intr_sync(adapter);
1827         ena_free_io_irq(adapter);
1828         ena_del_napi(adapter);
1829
1830         ena_free_all_tx_bufs(adapter);
1831         ena_free_all_rx_bufs(adapter);
1832         ena_free_all_io_tx_resources(adapter);
1833         ena_free_all_io_rx_resources(adapter);
1834 }
1835
1836 /* ena_open - Called when a network interface is made active
1837  * @netdev: network interface device structure
1838  *
1839  * Returns 0 on success, negative value on failure
1840  *
1841  * The open entry point is called when a network interface is made
1842  * active by the system (IFF_UP).  At this point all resources needed
1843  * for transmit and receive operations are allocated, the interrupt
1844  * handler is registered with the OS, the watchdog timer is started,
1845  * and the stack is notified that the interface is ready.
1846  */
1847 static int ena_open(struct net_device *netdev)
1848 {
1849         struct ena_adapter *adapter = netdev_priv(netdev);
1850         int rc;
1851
1852         /* Notify the stack of the actual queue counts. */
1853         rc = netif_set_real_num_tx_queues(netdev, adapter->num_queues);
1854         if (rc) {
1855                 netif_err(adapter, ifup, netdev, "Can't set num tx queues\n");
1856                 return rc;
1857         }
1858
1859         rc = netif_set_real_num_rx_queues(netdev, adapter->num_queues);
1860         if (rc) {
1861                 netif_err(adapter, ifup, netdev, "Can't set num rx queues\n");
1862                 return rc;
1863         }
1864
1865         rc = ena_up(adapter);
1866         if (rc)
1867                 return rc;
1868
1869         return rc;
1870 }
1871
1872 /* ena_close - Disables a network interface
1873  * @netdev: network interface device structure
1874  *
1875  * Returns 0, this is not allowed to fail
1876  *
1877  * The close entry point is called when an interface is de-activated
1878  * by the OS.  The hardware is still under the drivers control, but
1879  * needs to be disabled.  A global MAC reset is issued to stop the
1880  * hardware, and all transmit and receive resources are freed.
1881  */
1882 static int ena_close(struct net_device *netdev)
1883 {
1884         struct ena_adapter *adapter = netdev_priv(netdev);
1885
1886         netif_dbg(adapter, ifdown, netdev, "%s\n", __func__);
1887
1888         if (test_bit(ENA_FLAG_DEV_UP, &adapter->flags))
1889                 ena_down(adapter);
1890
1891         /* Check for device status and issue reset if needed*/
1892         check_for_admin_com_state(adapter);
1893         if (unlikely(test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags))) {
1894                 netif_err(adapter, ifdown, adapter->netdev,
1895                           "Destroy failure, restarting device\n");
1896                 ena_dump_stats_to_dmesg(adapter);
1897                 /* rtnl lock already obtained in dev_ioctl() layer */
1898                 ena_destroy_device(adapter, false);
1899                 ena_restore_device(adapter);
1900         }
1901
1902         return 0;
1903 }
1904
1905 static void ena_tx_csum(struct ena_com_tx_ctx *ena_tx_ctx, struct sk_buff *skb)
1906 {
1907         u32 mss = skb_shinfo(skb)->gso_size;
1908         struct ena_com_tx_meta *ena_meta = &ena_tx_ctx->ena_meta;
1909         u8 l4_protocol = 0;
1910
1911         if ((skb->ip_summed == CHECKSUM_PARTIAL) || mss) {
1912                 ena_tx_ctx->l4_csum_enable = 1;
1913                 if (mss) {
1914                         ena_tx_ctx->tso_enable = 1;
1915                         ena_meta->l4_hdr_len = tcp_hdr(skb)->doff;
1916                         ena_tx_ctx->l4_csum_partial = 0;
1917                 } else {
1918                         ena_tx_ctx->tso_enable = 0;
1919                         ena_meta->l4_hdr_len = 0;
1920                         ena_tx_ctx->l4_csum_partial = 1;
1921                 }
1922
1923                 switch (ip_hdr(skb)->version) {
1924                 case IPVERSION:
1925                         ena_tx_ctx->l3_proto = ENA_ETH_IO_L3_PROTO_IPV4;
1926                         if (ip_hdr(skb)->frag_off & htons(IP_DF))
1927                                 ena_tx_ctx->df = 1;
1928                         if (mss)
1929                                 ena_tx_ctx->l3_csum_enable = 1;
1930                         l4_protocol = ip_hdr(skb)->protocol;
1931                         break;
1932                 case 6:
1933                         ena_tx_ctx->l3_proto = ENA_ETH_IO_L3_PROTO_IPV6;
1934                         l4_protocol = ipv6_hdr(skb)->nexthdr;
1935                         break;
1936                 default:
1937                         break;
1938                 }
1939
1940                 if (l4_protocol == IPPROTO_TCP)
1941                         ena_tx_ctx->l4_proto = ENA_ETH_IO_L4_PROTO_TCP;
1942                 else
1943                         ena_tx_ctx->l4_proto = ENA_ETH_IO_L4_PROTO_UDP;
1944
1945                 ena_meta->mss = mss;
1946                 ena_meta->l3_hdr_len = skb_network_header_len(skb);
1947                 ena_meta->l3_hdr_offset = skb_network_offset(skb);
1948                 ena_tx_ctx->meta_valid = 1;
1949
1950         } else {
1951                 ena_tx_ctx->meta_valid = 0;
1952         }
1953 }
1954
1955 static int ena_check_and_linearize_skb(struct ena_ring *tx_ring,
1956                                        struct sk_buff *skb)
1957 {
1958         int num_frags, header_len, rc;
1959
1960         num_frags = skb_shinfo(skb)->nr_frags;
1961         header_len = skb_headlen(skb);
1962
1963         if (num_frags < tx_ring->sgl_size)
1964                 return 0;
1965
1966         if ((num_frags == tx_ring->sgl_size) &&
1967             (header_len < tx_ring->tx_max_header_size))
1968                 return 0;
1969
1970         u64_stats_update_begin(&tx_ring->syncp);
1971         tx_ring->tx_stats.linearize++;
1972         u64_stats_update_end(&tx_ring->syncp);
1973
1974         rc = skb_linearize(skb);
1975         if (unlikely(rc)) {
1976                 u64_stats_update_begin(&tx_ring->syncp);
1977                 tx_ring->tx_stats.linearize_failed++;
1978                 u64_stats_update_end(&tx_ring->syncp);
1979         }
1980
1981         return rc;
1982 }
1983
1984 /* Called with netif_tx_lock. */
1985 static netdev_tx_t ena_start_xmit(struct sk_buff *skb, struct net_device *dev)
1986 {
1987         struct ena_adapter *adapter = netdev_priv(dev);
1988         struct ena_tx_buffer *tx_info;
1989         struct ena_com_tx_ctx ena_tx_ctx;
1990         struct ena_ring *tx_ring;
1991         struct netdev_queue *txq;
1992         struct ena_com_buf *ena_buf;
1993         void *push_hdr;
1994         u32 len, last_frag;
1995         u16 next_to_use;
1996         u16 req_id;
1997         u16 push_len;
1998         u16 header_len;
1999         dma_addr_t dma;
2000         int qid, rc, nb_hw_desc;
2001         int i = -1;
2002
2003         netif_dbg(adapter, tx_queued, dev, "%s skb %p\n", __func__, skb);
2004         /*  Determine which tx ring we will be placed on */
2005         qid = skb_get_queue_mapping(skb);
2006         tx_ring = &adapter->tx_ring[qid];
2007         txq = netdev_get_tx_queue(dev, qid);
2008
2009         rc = ena_check_and_linearize_skb(tx_ring, skb);
2010         if (unlikely(rc))
2011                 goto error_drop_packet;
2012
2013         skb_tx_timestamp(skb);
2014         len = skb_headlen(skb);
2015
2016         next_to_use = tx_ring->next_to_use;
2017         req_id = tx_ring->free_tx_ids[next_to_use];
2018         tx_info = &tx_ring->tx_buffer_info[req_id];
2019         tx_info->num_of_bufs = 0;
2020
2021         WARN(tx_info->skb, "SKB isn't NULL req_id %d\n", req_id);
2022         ena_buf = tx_info->bufs;
2023         tx_info->skb = skb;
2024
2025         if (tx_ring->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) {
2026                 /* prepared the push buffer */
2027                 push_len = min_t(u32, len, tx_ring->tx_max_header_size);
2028                 header_len = push_len;
2029                 push_hdr = skb->data;
2030         } else {
2031                 push_len = 0;
2032                 header_len = min_t(u32, len, tx_ring->tx_max_header_size);
2033                 push_hdr = NULL;
2034         }
2035
2036         netif_dbg(adapter, tx_queued, dev,
2037                   "skb: %p header_buf->vaddr: %p push_len: %d\n", skb,
2038                   push_hdr, push_len);
2039
2040         if (len > push_len) {
2041                 dma = dma_map_single(tx_ring->dev, skb->data + push_len,
2042                                      len - push_len, DMA_TO_DEVICE);
2043                 if (dma_mapping_error(tx_ring->dev, dma))
2044                         goto error_report_dma_error;
2045
2046                 ena_buf->paddr = dma;
2047                 ena_buf->len = len - push_len;
2048
2049                 ena_buf++;
2050                 tx_info->num_of_bufs++;
2051         }
2052
2053         last_frag = skb_shinfo(skb)->nr_frags;
2054
2055         for (i = 0; i < last_frag; i++) {
2056                 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
2057
2058                 len = skb_frag_size(frag);
2059                 dma = skb_frag_dma_map(tx_ring->dev, frag, 0, len,
2060                                        DMA_TO_DEVICE);
2061                 if (dma_mapping_error(tx_ring->dev, dma))
2062                         goto error_report_dma_error;
2063
2064                 ena_buf->paddr = dma;
2065                 ena_buf->len = len;
2066                 ena_buf++;
2067         }
2068
2069         tx_info->num_of_bufs += last_frag;
2070
2071         memset(&ena_tx_ctx, 0x0, sizeof(struct ena_com_tx_ctx));
2072         ena_tx_ctx.ena_bufs = tx_info->bufs;
2073         ena_tx_ctx.push_header = push_hdr;
2074         ena_tx_ctx.num_bufs = tx_info->num_of_bufs;
2075         ena_tx_ctx.req_id = req_id;
2076         ena_tx_ctx.header_len = header_len;
2077
2078         /* set flags and meta data */
2079         ena_tx_csum(&ena_tx_ctx, skb);
2080
2081         /* prepare the packet's descriptors to dma engine */
2082         rc = ena_com_prepare_tx(tx_ring->ena_com_io_sq, &ena_tx_ctx,
2083                                 &nb_hw_desc);
2084
2085         if (unlikely(rc)) {
2086                 netif_err(adapter, tx_queued, dev,
2087                           "failed to prepare tx bufs\n");
2088                 u64_stats_update_begin(&tx_ring->syncp);
2089                 tx_ring->tx_stats.queue_stop++;
2090                 tx_ring->tx_stats.prepare_ctx_err++;
2091                 u64_stats_update_end(&tx_ring->syncp);
2092                 netif_tx_stop_queue(txq);
2093                 goto error_unmap_dma;
2094         }
2095
2096         netdev_tx_sent_queue(txq, skb->len);
2097
2098         u64_stats_update_begin(&tx_ring->syncp);
2099         tx_ring->tx_stats.cnt++;
2100         tx_ring->tx_stats.bytes += skb->len;
2101         u64_stats_update_end(&tx_ring->syncp);
2102
2103         tx_info->tx_descs = nb_hw_desc;
2104         tx_info->last_jiffies = jiffies;
2105         tx_info->print_once = 0;
2106
2107         tx_ring->next_to_use = ENA_TX_RING_IDX_NEXT(next_to_use,
2108                 tx_ring->ring_size);
2109
2110         /* stop the queue when no more space available, the packet can have up
2111          * to sgl_size + 2. one for the meta descriptor and one for header
2112          * (if the header is larger than tx_max_header_size).
2113          */
2114         if (unlikely(ena_com_sq_empty_space(tx_ring->ena_com_io_sq) <
2115                      (tx_ring->sgl_size + 2))) {
2116                 netif_dbg(adapter, tx_queued, dev, "%s stop queue %d\n",
2117                           __func__, qid);
2118
2119                 netif_tx_stop_queue(txq);
2120                 u64_stats_update_begin(&tx_ring->syncp);
2121                 tx_ring->tx_stats.queue_stop++;
2122                 u64_stats_update_end(&tx_ring->syncp);
2123
2124                 /* There is a rare condition where this function decide to
2125                  * stop the queue but meanwhile clean_tx_irq updates
2126                  * next_to_completion and terminates.
2127                  * The queue will remain stopped forever.
2128                  * To solve this issue add a mb() to make sure that
2129                  * netif_tx_stop_queue() write is vissible before checking if
2130                  * there is additional space in the queue.
2131                  */
2132                 smp_mb();
2133
2134                 if (ena_com_sq_empty_space(tx_ring->ena_com_io_sq)
2135                                 > ENA_TX_WAKEUP_THRESH) {
2136                         netif_tx_wake_queue(txq);
2137                         u64_stats_update_begin(&tx_ring->syncp);
2138                         tx_ring->tx_stats.queue_wakeup++;
2139                         u64_stats_update_end(&tx_ring->syncp);
2140                 }
2141         }
2142
2143         if (netif_xmit_stopped(txq) || !skb->xmit_more) {
2144                 /* trigger the dma engine. ena_com_write_sq_doorbell()
2145                  * has a mb
2146                  */
2147                 ena_com_write_sq_doorbell(tx_ring->ena_com_io_sq);
2148                 u64_stats_update_begin(&tx_ring->syncp);
2149                 tx_ring->tx_stats.doorbells++;
2150                 u64_stats_update_end(&tx_ring->syncp);
2151         }
2152
2153         return NETDEV_TX_OK;
2154
2155 error_report_dma_error:
2156         u64_stats_update_begin(&tx_ring->syncp);
2157         tx_ring->tx_stats.dma_mapping_err++;
2158         u64_stats_update_end(&tx_ring->syncp);
2159         netdev_warn(adapter->netdev, "failed to map skb\n");
2160
2161         tx_info->skb = NULL;
2162
2163 error_unmap_dma:
2164         if (i >= 0) {
2165                 /* save value of frag that failed */
2166                 last_frag = i;
2167
2168                 /* start back at beginning and unmap skb */
2169                 tx_info->skb = NULL;
2170                 ena_buf = tx_info->bufs;
2171                 dma_unmap_single(tx_ring->dev, dma_unmap_addr(ena_buf, paddr),
2172                                  dma_unmap_len(ena_buf, len), DMA_TO_DEVICE);
2173
2174                 /* unmap remaining mapped pages */
2175                 for (i = 0; i < last_frag; i++) {
2176                         ena_buf++;
2177                         dma_unmap_page(tx_ring->dev, dma_unmap_addr(ena_buf, paddr),
2178                                        dma_unmap_len(ena_buf, len), DMA_TO_DEVICE);
2179                 }
2180         }
2181
2182 error_drop_packet:
2183
2184         dev_kfree_skb(skb);
2185         return NETDEV_TX_OK;
2186 }
2187
2188 #ifdef CONFIG_NET_POLL_CONTROLLER
2189 static void ena_netpoll(struct net_device *netdev)
2190 {
2191         struct ena_adapter *adapter = netdev_priv(netdev);
2192         int i;
2193
2194         /* Dont schedule NAPI if the driver is in the middle of reset
2195          * or netdev is down.
2196          */
2197
2198         if (!test_bit(ENA_FLAG_DEV_UP, &adapter->flags) ||
2199             test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags))
2200                 return;
2201
2202         for (i = 0; i < adapter->num_queues; i++)
2203                 napi_schedule(&adapter->ena_napi[i].napi);
2204 }
2205 #endif /* CONFIG_NET_POLL_CONTROLLER */
2206
2207 static u16 ena_select_queue(struct net_device *dev, struct sk_buff *skb,
2208                             struct net_device *sb_dev,
2209                             select_queue_fallback_t fallback)
2210 {
2211         u16 qid;
2212         /* we suspect that this is good for in--kernel network services that
2213          * want to loop incoming skb rx to tx in normal user generated traffic,
2214          * most probably we will not get to this
2215          */
2216         if (skb_rx_queue_recorded(skb))
2217                 qid = skb_get_rx_queue(skb);
2218         else
2219                 qid = fallback(dev, skb, NULL);
2220
2221         return qid;
2222 }
2223
2224 static void ena_config_host_info(struct ena_com_dev *ena_dev)
2225 {
2226         struct ena_admin_host_info *host_info;
2227         int rc;
2228
2229         /* Allocate only the host info */
2230         rc = ena_com_allocate_host_info(ena_dev);
2231         if (rc) {
2232                 pr_err("Cannot allocate host info\n");
2233                 return;
2234         }
2235
2236         host_info = ena_dev->host_attr.host_info;
2237
2238         host_info->os_type = ENA_ADMIN_OS_LINUX;
2239         host_info->kernel_ver = LINUX_VERSION_CODE;
2240         strncpy(host_info->kernel_ver_str, utsname()->version,
2241                 sizeof(host_info->kernel_ver_str) - 1);
2242         host_info->os_dist = 0;
2243         strncpy(host_info->os_dist_str, utsname()->release,
2244                 sizeof(host_info->os_dist_str) - 1);
2245         host_info->driver_version =
2246                 (DRV_MODULE_VER_MAJOR) |
2247                 (DRV_MODULE_VER_MINOR << ENA_ADMIN_HOST_INFO_MINOR_SHIFT) |
2248                 (DRV_MODULE_VER_SUBMINOR << ENA_ADMIN_HOST_INFO_SUB_MINOR_SHIFT);
2249
2250         rc = ena_com_set_host_attributes(ena_dev);
2251         if (rc) {
2252                 if (rc == -EOPNOTSUPP)
2253                         pr_warn("Cannot set host attributes\n");
2254                 else
2255                         pr_err("Cannot set host attributes\n");
2256
2257                 goto err;
2258         }
2259
2260         return;
2261
2262 err:
2263         ena_com_delete_host_info(ena_dev);
2264 }
2265
2266 static void ena_config_debug_area(struct ena_adapter *adapter)
2267 {
2268         u32 debug_area_size;
2269         int rc, ss_count;
2270
2271         ss_count = ena_get_sset_count(adapter->netdev, ETH_SS_STATS);
2272         if (ss_count <= 0) {
2273                 netif_err(adapter, drv, adapter->netdev,
2274                           "SS count is negative\n");
2275                 return;
2276         }
2277
2278         /* allocate 32 bytes for each string and 64bit for the value */
2279         debug_area_size = ss_count * ETH_GSTRING_LEN + sizeof(u64) * ss_count;
2280
2281         rc = ena_com_allocate_debug_area(adapter->ena_dev, debug_area_size);
2282         if (rc) {
2283                 pr_err("Cannot allocate debug area\n");
2284                 return;
2285         }
2286
2287         rc = ena_com_set_host_attributes(adapter->ena_dev);
2288         if (rc) {
2289                 if (rc == -EOPNOTSUPP)
2290                         netif_warn(adapter, drv, adapter->netdev,
2291                                    "Cannot set host attributes\n");
2292                 else
2293                         netif_err(adapter, drv, adapter->netdev,
2294                                   "Cannot set host attributes\n");
2295                 goto err;
2296         }
2297
2298         return;
2299 err:
2300         ena_com_delete_debug_area(adapter->ena_dev);
2301 }
2302
2303 static void ena_get_stats64(struct net_device *netdev,
2304                             struct rtnl_link_stats64 *stats)
2305 {
2306         struct ena_adapter *adapter = netdev_priv(netdev);
2307         struct ena_ring *rx_ring, *tx_ring;
2308         unsigned int start;
2309         u64 rx_drops;
2310         int i;
2311
2312         if (!test_bit(ENA_FLAG_DEV_UP, &adapter->flags))
2313                 return;
2314
2315         for (i = 0; i < adapter->num_queues; i++) {
2316                 u64 bytes, packets;
2317
2318                 tx_ring = &adapter->tx_ring[i];
2319
2320                 do {
2321                         start = u64_stats_fetch_begin_irq(&tx_ring->syncp);
2322                         packets = tx_ring->tx_stats.cnt;
2323                         bytes = tx_ring->tx_stats.bytes;
2324                 } while (u64_stats_fetch_retry_irq(&tx_ring->syncp, start));
2325
2326                 stats->tx_packets += packets;
2327                 stats->tx_bytes += bytes;
2328
2329                 rx_ring = &adapter->rx_ring[i];
2330
2331                 do {
2332                         start = u64_stats_fetch_begin_irq(&rx_ring->syncp);
2333                         packets = rx_ring->rx_stats.cnt;
2334                         bytes = rx_ring->rx_stats.bytes;
2335                 } while (u64_stats_fetch_retry_irq(&rx_ring->syncp, start));
2336
2337                 stats->rx_packets += packets;
2338                 stats->rx_bytes += bytes;
2339         }
2340
2341         do {
2342                 start = u64_stats_fetch_begin_irq(&adapter->syncp);
2343                 rx_drops = adapter->dev_stats.rx_drops;
2344         } while (u64_stats_fetch_retry_irq(&adapter->syncp, start));
2345
2346         stats->rx_dropped = rx_drops;
2347
2348         stats->multicast = 0;
2349         stats->collisions = 0;
2350
2351         stats->rx_length_errors = 0;
2352         stats->rx_crc_errors = 0;
2353         stats->rx_frame_errors = 0;
2354         stats->rx_fifo_errors = 0;
2355         stats->rx_missed_errors = 0;
2356         stats->tx_window_errors = 0;
2357
2358         stats->rx_errors = 0;
2359         stats->tx_errors = 0;
2360 }
2361
2362 static const struct net_device_ops ena_netdev_ops = {
2363         .ndo_open               = ena_open,
2364         .ndo_stop               = ena_close,
2365         .ndo_start_xmit         = ena_start_xmit,
2366         .ndo_select_queue       = ena_select_queue,
2367         .ndo_get_stats64        = ena_get_stats64,
2368         .ndo_tx_timeout         = ena_tx_timeout,
2369         .ndo_change_mtu         = ena_change_mtu,
2370         .ndo_set_mac_address    = NULL,
2371         .ndo_validate_addr      = eth_validate_addr,
2372 #ifdef CONFIG_NET_POLL_CONTROLLER
2373         .ndo_poll_controller    = ena_netpoll,
2374 #endif /* CONFIG_NET_POLL_CONTROLLER */
2375 };
2376
2377 static int ena_device_validate_params(struct ena_adapter *adapter,
2378                                       struct ena_com_dev_get_features_ctx *get_feat_ctx)
2379 {
2380         struct net_device *netdev = adapter->netdev;
2381         int rc;
2382
2383         rc = ether_addr_equal(get_feat_ctx->dev_attr.mac_addr,
2384                               adapter->mac_addr);
2385         if (!rc) {
2386                 netif_err(adapter, drv, netdev,
2387                           "Error, mac address are different\n");
2388                 return -EINVAL;
2389         }
2390
2391         if ((get_feat_ctx->max_queues.max_cq_num < adapter->num_queues) ||
2392             (get_feat_ctx->max_queues.max_sq_num < adapter->num_queues)) {
2393                 netif_err(adapter, drv, netdev,
2394                           "Error, device doesn't support enough queues\n");
2395                 return -EINVAL;
2396         }
2397
2398         if (get_feat_ctx->dev_attr.max_mtu < netdev->mtu) {
2399                 netif_err(adapter, drv, netdev,
2400                           "Error, device max mtu is smaller than netdev MTU\n");
2401                 return -EINVAL;
2402         }
2403
2404         return 0;
2405 }
2406
2407 static int ena_device_init(struct ena_com_dev *ena_dev, struct pci_dev *pdev,
2408                            struct ena_com_dev_get_features_ctx *get_feat_ctx,
2409                            bool *wd_state)
2410 {
2411         struct device *dev = &pdev->dev;
2412         bool readless_supported;
2413         u32 aenq_groups;
2414         int dma_width;
2415         int rc;
2416
2417         rc = ena_com_mmio_reg_read_request_init(ena_dev);
2418         if (rc) {
2419                 dev_err(dev, "failed to init mmio read less\n");
2420                 return rc;
2421         }
2422
2423         /* The PCIe configuration space revision id indicate if mmio reg
2424          * read is disabled
2425          */
2426         readless_supported = !(pdev->revision & ENA_MMIO_DISABLE_REG_READ);
2427         ena_com_set_mmio_read_mode(ena_dev, readless_supported);
2428
2429         rc = ena_com_dev_reset(ena_dev, ENA_REGS_RESET_NORMAL);
2430         if (rc) {
2431                 dev_err(dev, "Can not reset device\n");
2432                 goto err_mmio_read_less;
2433         }
2434
2435         rc = ena_com_validate_version(ena_dev);
2436         if (rc) {
2437                 dev_err(dev, "device version is too low\n");
2438                 goto err_mmio_read_less;
2439         }
2440
2441         dma_width = ena_com_get_dma_width(ena_dev);
2442         if (dma_width < 0) {
2443                 dev_err(dev, "Invalid dma width value %d", dma_width);
2444                 rc = dma_width;
2445                 goto err_mmio_read_less;
2446         }
2447
2448         rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(dma_width));
2449         if (rc) {
2450                 dev_err(dev, "pci_set_dma_mask failed 0x%x\n", rc);
2451                 goto err_mmio_read_less;
2452         }
2453
2454         rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(dma_width));
2455         if (rc) {
2456                 dev_err(dev, "err_pci_set_consistent_dma_mask failed 0x%x\n",
2457                         rc);
2458                 goto err_mmio_read_less;
2459         }
2460
2461         /* ENA admin level init */
2462         rc = ena_com_admin_init(ena_dev, &aenq_handlers, true);
2463         if (rc) {
2464                 dev_err(dev,
2465                         "Can not initialize ena admin queue with device\n");
2466                 goto err_mmio_read_less;
2467         }
2468
2469         /* To enable the msix interrupts the driver needs to know the number
2470          * of queues. So the driver uses polling mode to retrieve this
2471          * information
2472          */
2473         ena_com_set_admin_polling_mode(ena_dev, true);
2474
2475         ena_config_host_info(ena_dev);
2476
2477         /* Get Device Attributes*/
2478         rc = ena_com_get_dev_attr_feat(ena_dev, get_feat_ctx);
2479         if (rc) {
2480                 dev_err(dev, "Cannot get attribute for ena device rc=%d\n", rc);
2481                 goto err_admin_init;
2482         }
2483
2484         /* Try to turn all the available aenq groups */
2485         aenq_groups = BIT(ENA_ADMIN_LINK_CHANGE) |
2486                 BIT(ENA_ADMIN_FATAL_ERROR) |
2487                 BIT(ENA_ADMIN_WARNING) |
2488                 BIT(ENA_ADMIN_NOTIFICATION) |
2489                 BIT(ENA_ADMIN_KEEP_ALIVE);
2490
2491         aenq_groups &= get_feat_ctx->aenq.supported_groups;
2492
2493         rc = ena_com_set_aenq_config(ena_dev, aenq_groups);
2494         if (rc) {
2495                 dev_err(dev, "Cannot configure aenq groups rc= %d\n", rc);
2496                 goto err_admin_init;
2497         }
2498
2499         *wd_state = !!(aenq_groups & BIT(ENA_ADMIN_KEEP_ALIVE));
2500
2501         return 0;
2502
2503 err_admin_init:
2504         ena_com_delete_host_info(ena_dev);
2505         ena_com_admin_destroy(ena_dev);
2506 err_mmio_read_less:
2507         ena_com_mmio_reg_read_request_destroy(ena_dev);
2508
2509         return rc;
2510 }
2511
2512 static int ena_enable_msix_and_set_admin_interrupts(struct ena_adapter *adapter,
2513                                                     int io_vectors)
2514 {
2515         struct ena_com_dev *ena_dev = adapter->ena_dev;
2516         struct device *dev = &adapter->pdev->dev;
2517         int rc;
2518
2519         rc = ena_enable_msix(adapter, io_vectors);
2520         if (rc) {
2521                 dev_err(dev, "Can not reserve msix vectors\n");
2522                 return rc;
2523         }
2524
2525         ena_setup_mgmnt_intr(adapter);
2526
2527         rc = ena_request_mgmnt_irq(adapter);
2528         if (rc) {
2529                 dev_err(dev, "Can not setup management interrupts\n");
2530                 goto err_disable_msix;
2531         }
2532
2533         ena_com_set_admin_polling_mode(ena_dev, false);
2534
2535         ena_com_admin_aenq_enable(ena_dev);
2536
2537         return 0;
2538
2539 err_disable_msix:
2540         ena_disable_msix(adapter);
2541
2542         return rc;
2543 }
2544
2545 static void ena_destroy_device(struct ena_adapter *adapter, bool graceful)
2546 {
2547         struct net_device *netdev = adapter->netdev;
2548         struct ena_com_dev *ena_dev = adapter->ena_dev;
2549         bool dev_up;
2550
2551         if (!test_bit(ENA_FLAG_DEVICE_RUNNING, &adapter->flags))
2552                 return;
2553
2554         netif_carrier_off(netdev);
2555
2556         del_timer_sync(&adapter->timer_service);
2557
2558         dev_up = test_bit(ENA_FLAG_DEV_UP, &adapter->flags);
2559         adapter->dev_up_before_reset = dev_up;
2560
2561         if (!graceful)
2562                 ena_com_set_admin_running_state(ena_dev, false);
2563
2564         if (test_bit(ENA_FLAG_DEV_UP, &adapter->flags))
2565                 ena_down(adapter);
2566
2567         /* Before releasing the ENA resources, a device reset is required.
2568          * (to prevent the device from accessing them).
2569          * In case the reset flag is set and the device is up, ena_down()
2570          * already perform the reset, so it can be skipped.
2571          */
2572         if (!(test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags) && dev_up))
2573                 ena_com_dev_reset(adapter->ena_dev, adapter->reset_reason);
2574
2575         ena_free_mgmnt_irq(adapter);
2576
2577         ena_disable_msix(adapter);
2578
2579         ena_com_abort_admin_commands(ena_dev);
2580
2581         ena_com_wait_for_abort_completion(ena_dev);
2582
2583         ena_com_admin_destroy(ena_dev);
2584
2585         ena_com_mmio_reg_read_request_destroy(ena_dev);
2586
2587         adapter->reset_reason = ENA_REGS_RESET_NORMAL;
2588
2589         clear_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
2590         clear_bit(ENA_FLAG_DEVICE_RUNNING, &adapter->flags);
2591 }
2592
2593 static int ena_restore_device(struct ena_adapter *adapter)
2594 {
2595         struct ena_com_dev_get_features_ctx get_feat_ctx;
2596         struct ena_com_dev *ena_dev = adapter->ena_dev;
2597         struct pci_dev *pdev = adapter->pdev;
2598         bool wd_state;
2599         int rc;
2600
2601         set_bit(ENA_FLAG_ONGOING_RESET, &adapter->flags);
2602         rc = ena_device_init(ena_dev, adapter->pdev, &get_feat_ctx, &wd_state);
2603         if (rc) {
2604                 dev_err(&pdev->dev, "Can not initialize device\n");
2605                 goto err;
2606         }
2607         adapter->wd_state = wd_state;
2608
2609         rc = ena_device_validate_params(adapter, &get_feat_ctx);
2610         if (rc) {
2611                 dev_err(&pdev->dev, "Validation of device parameters failed\n");
2612                 goto err_device_destroy;
2613         }
2614
2615         clear_bit(ENA_FLAG_ONGOING_RESET, &adapter->flags);
2616         /* Make sure we don't have a race with AENQ Links state handler */
2617         if (test_bit(ENA_FLAG_LINK_UP, &adapter->flags))
2618                 netif_carrier_on(adapter->netdev);
2619
2620         rc = ena_enable_msix_and_set_admin_interrupts(adapter,
2621                                                       adapter->num_queues);
2622         if (rc) {
2623                 dev_err(&pdev->dev, "Enable MSI-X failed\n");
2624                 goto err_device_destroy;
2625         }
2626         /* If the interface was up before the reset bring it up */
2627         if (adapter->dev_up_before_reset) {
2628                 rc = ena_up(adapter);
2629                 if (rc) {
2630                         dev_err(&pdev->dev, "Failed to create I/O queues\n");
2631                         goto err_disable_msix;
2632                 }
2633         }
2634
2635         set_bit(ENA_FLAG_DEVICE_RUNNING, &adapter->flags);
2636         mod_timer(&adapter->timer_service, round_jiffies(jiffies + HZ));
2637         dev_err(&pdev->dev, "Device reset completed successfully\n");
2638
2639         return rc;
2640 err_disable_msix:
2641         ena_free_mgmnt_irq(adapter);
2642         ena_disable_msix(adapter);
2643 err_device_destroy:
2644         ena_com_admin_destroy(ena_dev);
2645 err:
2646         clear_bit(ENA_FLAG_DEVICE_RUNNING, &adapter->flags);
2647         clear_bit(ENA_FLAG_ONGOING_RESET, &adapter->flags);
2648         dev_err(&pdev->dev,
2649                 "Reset attempt failed. Can not reset the device\n");
2650
2651         return rc;
2652 }
2653
2654 static void ena_fw_reset_device(struct work_struct *work)
2655 {
2656         struct ena_adapter *adapter =
2657                 container_of(work, struct ena_adapter, reset_task);
2658         struct pci_dev *pdev = adapter->pdev;
2659
2660         if (unlikely(!test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags))) {
2661                 dev_err(&pdev->dev,
2662                         "device reset schedule while reset bit is off\n");
2663                 return;
2664         }
2665         rtnl_lock();
2666         ena_destroy_device(adapter, false);
2667         ena_restore_device(adapter);
2668         rtnl_unlock();
2669 }
2670
2671 static int check_for_rx_interrupt_queue(struct ena_adapter *adapter,
2672                                         struct ena_ring *rx_ring)
2673 {
2674         if (likely(rx_ring->first_interrupt))
2675                 return 0;
2676
2677         if (ena_com_cq_empty(rx_ring->ena_com_io_cq))
2678                 return 0;
2679
2680         rx_ring->no_interrupt_event_cnt++;
2681
2682         if (rx_ring->no_interrupt_event_cnt == ENA_MAX_NO_INTERRUPT_ITERATIONS) {
2683                 netif_err(adapter, rx_err, adapter->netdev,
2684                           "Potential MSIX issue on Rx side Queue = %d. Reset the device\n",
2685                           rx_ring->qid);
2686                 adapter->reset_reason = ENA_REGS_RESET_MISS_INTERRUPT;
2687                 smp_mb__before_atomic();
2688                 set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
2689                 return -EIO;
2690         }
2691
2692         return 0;
2693 }
2694
2695 static int check_missing_comp_in_tx_queue(struct ena_adapter *adapter,
2696                                           struct ena_ring *tx_ring)
2697 {
2698         struct ena_tx_buffer *tx_buf;
2699         unsigned long last_jiffies;
2700         u32 missed_tx = 0;
2701         int i, rc = 0;
2702
2703         for (i = 0; i < tx_ring->ring_size; i++) {
2704                 tx_buf = &tx_ring->tx_buffer_info[i];
2705                 last_jiffies = tx_buf->last_jiffies;
2706
2707                 if (last_jiffies == 0)
2708                         /* no pending Tx at this location */
2709                         continue;
2710
2711                 if (unlikely(!tx_ring->first_interrupt && time_is_before_jiffies(last_jiffies +
2712                              2 * adapter->missing_tx_completion_to))) {
2713                         /* If after graceful period interrupt is still not
2714                          * received, we schedule a reset
2715                          */
2716                         netif_err(adapter, tx_err, adapter->netdev,
2717                                   "Potential MSIX issue on Tx side Queue = %d. Reset the device\n",
2718                                   tx_ring->qid);
2719                         adapter->reset_reason = ENA_REGS_RESET_MISS_INTERRUPT;
2720                         smp_mb__before_atomic();
2721                         set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
2722                         return -EIO;
2723                 }
2724
2725                 if (unlikely(time_is_before_jiffies(last_jiffies +
2726                                 adapter->missing_tx_completion_to))) {
2727                         if (!tx_buf->print_once)
2728                                 netif_notice(adapter, tx_err, adapter->netdev,
2729                                              "Found a Tx that wasn't completed on time, qid %d, index %d.\n",
2730                                              tx_ring->qid, i);
2731
2732                         tx_buf->print_once = 1;
2733                         missed_tx++;
2734                 }
2735         }
2736
2737         if (unlikely(missed_tx > adapter->missing_tx_completion_threshold)) {
2738                 netif_err(adapter, tx_err, adapter->netdev,
2739                           "The number of lost tx completions is above the threshold (%d > %d). Reset the device\n",
2740                           missed_tx,
2741                           adapter->missing_tx_completion_threshold);
2742                 adapter->reset_reason =
2743                         ENA_REGS_RESET_MISS_TX_CMPL;
2744                 set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
2745                 rc = -EIO;
2746         }
2747
2748         u64_stats_update_begin(&tx_ring->syncp);
2749         tx_ring->tx_stats.missed_tx = missed_tx;
2750         u64_stats_update_end(&tx_ring->syncp);
2751
2752         return rc;
2753 }
2754
2755 static void check_for_missing_completions(struct ena_adapter *adapter)
2756 {
2757         struct ena_ring *tx_ring;
2758         struct ena_ring *rx_ring;
2759         int i, budget, rc;
2760
2761         /* Make sure the driver doesn't turn the device in other process */
2762         smp_rmb();
2763
2764         if (!test_bit(ENA_FLAG_DEV_UP, &adapter->flags))
2765                 return;
2766
2767         if (test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags))
2768                 return;
2769
2770         if (adapter->missing_tx_completion_to == ENA_HW_HINTS_NO_TIMEOUT)
2771                 return;
2772
2773         budget = ENA_MONITORED_TX_QUEUES;
2774
2775         for (i = adapter->last_monitored_tx_qid; i < adapter->num_queues; i++) {
2776                 tx_ring = &adapter->tx_ring[i];
2777                 rx_ring = &adapter->rx_ring[i];
2778
2779                 rc = check_missing_comp_in_tx_queue(adapter, tx_ring);
2780                 if (unlikely(rc))
2781                         return;
2782
2783                 rc = check_for_rx_interrupt_queue(adapter, rx_ring);
2784                 if (unlikely(rc))
2785                         return;
2786
2787                 budget--;
2788                 if (!budget)
2789                         break;
2790         }
2791
2792         adapter->last_monitored_tx_qid = i % adapter->num_queues;
2793 }
2794
2795 /* trigger napi schedule after 2 consecutive detections */
2796 #define EMPTY_RX_REFILL 2
2797 /* For the rare case where the device runs out of Rx descriptors and the
2798  * napi handler failed to refill new Rx descriptors (due to a lack of memory
2799  * for example).
2800  * This case will lead to a deadlock:
2801  * The device won't send interrupts since all the new Rx packets will be dropped
2802  * The napi handler won't allocate new Rx descriptors so the device will be
2803  * able to send new packets.
2804  *
2805  * This scenario can happen when the kernel's vm.min_free_kbytes is too small.
2806  * It is recommended to have at least 512MB, with a minimum of 128MB for
2807  * constrained environment).
2808  *
2809  * When such a situation is detected - Reschedule napi
2810  */
2811 static void check_for_empty_rx_ring(struct ena_adapter *adapter)
2812 {
2813         struct ena_ring *rx_ring;
2814         int i, refill_required;
2815
2816         if (!test_bit(ENA_FLAG_DEV_UP, &adapter->flags))
2817                 return;
2818
2819         if (test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags))
2820                 return;
2821
2822         for (i = 0; i < adapter->num_queues; i++) {
2823                 rx_ring = &adapter->rx_ring[i];
2824
2825                 refill_required =
2826                         ena_com_sq_empty_space(rx_ring->ena_com_io_sq);
2827                 if (unlikely(refill_required == (rx_ring->ring_size - 1))) {
2828                         rx_ring->empty_rx_queue++;
2829
2830                         if (rx_ring->empty_rx_queue >= EMPTY_RX_REFILL) {
2831                                 u64_stats_update_begin(&rx_ring->syncp);
2832                                 rx_ring->rx_stats.empty_rx_ring++;
2833                                 u64_stats_update_end(&rx_ring->syncp);
2834
2835                                 netif_err(adapter, drv, adapter->netdev,
2836                                           "trigger refill for ring %d\n", i);
2837
2838                                 napi_schedule(rx_ring->napi);
2839                                 rx_ring->empty_rx_queue = 0;
2840                         }
2841                 } else {
2842                         rx_ring->empty_rx_queue = 0;
2843                 }
2844         }
2845 }
2846
2847 /* Check for keep alive expiration */
2848 static void check_for_missing_keep_alive(struct ena_adapter *adapter)
2849 {
2850         unsigned long keep_alive_expired;
2851
2852         if (!adapter->wd_state)
2853                 return;
2854
2855         if (adapter->keep_alive_timeout == ENA_HW_HINTS_NO_TIMEOUT)
2856                 return;
2857
2858         keep_alive_expired = round_jiffies(adapter->last_keep_alive_jiffies +
2859                                            adapter->keep_alive_timeout);
2860         if (unlikely(time_is_before_jiffies(keep_alive_expired))) {
2861                 netif_err(adapter, drv, adapter->netdev,
2862                           "Keep alive watchdog timeout.\n");
2863                 u64_stats_update_begin(&adapter->syncp);
2864                 adapter->dev_stats.wd_expired++;
2865                 u64_stats_update_end(&adapter->syncp);
2866                 adapter->reset_reason = ENA_REGS_RESET_KEEP_ALIVE_TO;
2867                 set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
2868         }
2869 }
2870
2871 static void check_for_admin_com_state(struct ena_adapter *adapter)
2872 {
2873         if (unlikely(!ena_com_get_admin_running_state(adapter->ena_dev))) {
2874                 netif_err(adapter, drv, adapter->netdev,
2875                           "ENA admin queue is not in running state!\n");
2876                 u64_stats_update_begin(&adapter->syncp);
2877                 adapter->dev_stats.admin_q_pause++;
2878                 u64_stats_update_end(&adapter->syncp);
2879                 adapter->reset_reason = ENA_REGS_RESET_ADMIN_TO;
2880                 set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
2881         }
2882 }
2883
2884 static void ena_update_hints(struct ena_adapter *adapter,
2885                              struct ena_admin_ena_hw_hints *hints)
2886 {
2887         struct net_device *netdev = adapter->netdev;
2888
2889         if (hints->admin_completion_tx_timeout)
2890                 adapter->ena_dev->admin_queue.completion_timeout =
2891                         hints->admin_completion_tx_timeout * 1000;
2892
2893         if (hints->mmio_read_timeout)
2894                 /* convert to usec */
2895                 adapter->ena_dev->mmio_read.reg_read_to =
2896                         hints->mmio_read_timeout * 1000;
2897
2898         if (hints->missed_tx_completion_count_threshold_to_reset)
2899                 adapter->missing_tx_completion_threshold =
2900                         hints->missed_tx_completion_count_threshold_to_reset;
2901
2902         if (hints->missing_tx_completion_timeout) {
2903                 if (hints->missing_tx_completion_timeout == ENA_HW_HINTS_NO_TIMEOUT)
2904                         adapter->missing_tx_completion_to = ENA_HW_HINTS_NO_TIMEOUT;
2905                 else
2906                         adapter->missing_tx_completion_to =
2907                                 msecs_to_jiffies(hints->missing_tx_completion_timeout);
2908         }
2909
2910         if (hints->netdev_wd_timeout)
2911                 netdev->watchdog_timeo = msecs_to_jiffies(hints->netdev_wd_timeout);
2912
2913         if (hints->driver_watchdog_timeout) {
2914                 if (hints->driver_watchdog_timeout == ENA_HW_HINTS_NO_TIMEOUT)
2915                         adapter->keep_alive_timeout = ENA_HW_HINTS_NO_TIMEOUT;
2916                 else
2917                         adapter->keep_alive_timeout =
2918                                 msecs_to_jiffies(hints->driver_watchdog_timeout);
2919         }
2920 }
2921
2922 static void ena_update_host_info(struct ena_admin_host_info *host_info,
2923                                  struct net_device *netdev)
2924 {
2925         host_info->supported_network_features[0] =
2926                 netdev->features & GENMASK_ULL(31, 0);
2927         host_info->supported_network_features[1] =
2928                 (netdev->features & GENMASK_ULL(63, 32)) >> 32;
2929 }
2930
2931 static void ena_timer_service(struct timer_list *t)
2932 {
2933         struct ena_adapter *adapter = from_timer(adapter, t, timer_service);
2934         u8 *debug_area = adapter->ena_dev->host_attr.debug_area_virt_addr;
2935         struct ena_admin_host_info *host_info =
2936                 adapter->ena_dev->host_attr.host_info;
2937
2938         check_for_missing_keep_alive(adapter);
2939
2940         check_for_admin_com_state(adapter);
2941
2942         check_for_missing_completions(adapter);
2943
2944         check_for_empty_rx_ring(adapter);
2945
2946         if (debug_area)
2947                 ena_dump_stats_to_buf(adapter, debug_area);
2948
2949         if (host_info)
2950                 ena_update_host_info(host_info, adapter->netdev);
2951
2952         if (unlikely(test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags))) {
2953                 netif_err(adapter, drv, adapter->netdev,
2954                           "Trigger reset is on\n");
2955                 ena_dump_stats_to_dmesg(adapter);
2956                 queue_work(ena_wq, &adapter->reset_task);
2957                 return;
2958         }
2959
2960         /* Reset the timer */
2961         mod_timer(&adapter->timer_service, jiffies + HZ);
2962 }
2963
2964 static int ena_calc_io_queue_num(struct pci_dev *pdev,
2965                                  struct ena_com_dev *ena_dev,
2966                                  struct ena_com_dev_get_features_ctx *get_feat_ctx)
2967 {
2968         int io_sq_num, io_queue_num;
2969
2970         /* In case of LLQ use the llq number in the get feature cmd */
2971         if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) {
2972                 io_sq_num = get_feat_ctx->max_queues.max_llq_num;
2973
2974                 if (io_sq_num == 0) {
2975                         dev_err(&pdev->dev,
2976                                 "Trying to use LLQ but llq_num is 0. Fall back into regular queues\n");
2977
2978                         ena_dev->tx_mem_queue_type =
2979                                 ENA_ADMIN_PLACEMENT_POLICY_HOST;
2980                         io_sq_num = get_feat_ctx->max_queues.max_sq_num;
2981                 }
2982         } else {
2983                 io_sq_num = get_feat_ctx->max_queues.max_sq_num;
2984         }
2985
2986         io_queue_num = min_t(int, num_online_cpus(), ENA_MAX_NUM_IO_QUEUES);
2987         io_queue_num = min_t(int, io_queue_num, io_sq_num);
2988         io_queue_num = min_t(int, io_queue_num,
2989                              get_feat_ctx->max_queues.max_cq_num);
2990         /* 1 IRQ for for mgmnt and 1 IRQs for each IO direction */
2991         io_queue_num = min_t(int, io_queue_num, pci_msix_vec_count(pdev) - 1);
2992         if (unlikely(!io_queue_num)) {
2993                 dev_err(&pdev->dev, "The device doesn't have io queues\n");
2994                 return -EFAULT;
2995         }
2996
2997         return io_queue_num;
2998 }
2999
3000 static void ena_set_push_mode(struct pci_dev *pdev, struct ena_com_dev *ena_dev,
3001                               struct ena_com_dev_get_features_ctx *get_feat_ctx)
3002 {
3003         bool has_mem_bar;
3004
3005         has_mem_bar = pci_select_bars(pdev, IORESOURCE_MEM) & BIT(ENA_MEM_BAR);
3006
3007         /* Enable push mode if device supports LLQ */
3008         if (has_mem_bar && (get_feat_ctx->max_queues.max_llq_num > 0))
3009                 ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_DEV;
3010         else
3011                 ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST;
3012 }
3013
3014 static void ena_set_dev_offloads(struct ena_com_dev_get_features_ctx *feat,
3015                                  struct net_device *netdev)
3016 {
3017         netdev_features_t dev_features = 0;
3018
3019         /* Set offload features */
3020         if (feat->offload.tx &
3021                 ENA_ADMIN_FEATURE_OFFLOAD_DESC_TX_L4_IPV4_CSUM_PART_MASK)
3022                 dev_features |= NETIF_F_IP_CSUM;
3023
3024         if (feat->offload.tx &
3025                 ENA_ADMIN_FEATURE_OFFLOAD_DESC_TX_L4_IPV6_CSUM_PART_MASK)
3026                 dev_features |= NETIF_F_IPV6_CSUM;
3027
3028         if (feat->offload.tx & ENA_ADMIN_FEATURE_OFFLOAD_DESC_TSO_IPV4_MASK)
3029                 dev_features |= NETIF_F_TSO;
3030
3031         if (feat->offload.tx & ENA_ADMIN_FEATURE_OFFLOAD_DESC_TSO_IPV6_MASK)
3032                 dev_features |= NETIF_F_TSO6;
3033
3034         if (feat->offload.tx & ENA_ADMIN_FEATURE_OFFLOAD_DESC_TSO_ECN_MASK)
3035                 dev_features |= NETIF_F_TSO_ECN;
3036
3037         if (feat->offload.rx_supported &
3038                 ENA_ADMIN_FEATURE_OFFLOAD_DESC_RX_L4_IPV4_CSUM_MASK)
3039                 dev_features |= NETIF_F_RXCSUM;
3040
3041         if (feat->offload.rx_supported &
3042                 ENA_ADMIN_FEATURE_OFFLOAD_DESC_RX_L4_IPV6_CSUM_MASK)
3043                 dev_features |= NETIF_F_RXCSUM;
3044
3045         netdev->features =
3046                 dev_features |
3047                 NETIF_F_SG |
3048                 NETIF_F_RXHASH |
3049                 NETIF_F_HIGHDMA;
3050
3051         netdev->hw_features |= netdev->features;
3052         netdev->vlan_features |= netdev->features;
3053 }
3054
3055 static void ena_set_conf_feat_params(struct ena_adapter *adapter,
3056                                      struct ena_com_dev_get_features_ctx *feat)
3057 {
3058         struct net_device *netdev = adapter->netdev;
3059
3060         /* Copy mac address */
3061         if (!is_valid_ether_addr(feat->dev_attr.mac_addr)) {
3062                 eth_hw_addr_random(netdev);
3063                 ether_addr_copy(adapter->mac_addr, netdev->dev_addr);
3064         } else {
3065                 ether_addr_copy(adapter->mac_addr, feat->dev_attr.mac_addr);
3066                 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
3067         }
3068
3069         /* Set offload features */
3070         ena_set_dev_offloads(feat, netdev);
3071
3072         adapter->max_mtu = feat->dev_attr.max_mtu;
3073         netdev->max_mtu = adapter->max_mtu;
3074         netdev->min_mtu = ENA_MIN_MTU;
3075 }
3076
3077 static int ena_rss_init_default(struct ena_adapter *adapter)
3078 {
3079         struct ena_com_dev *ena_dev = adapter->ena_dev;
3080         struct device *dev = &adapter->pdev->dev;
3081         int rc, i;
3082         u32 val;
3083
3084         rc = ena_com_rss_init(ena_dev, ENA_RX_RSS_TABLE_LOG_SIZE);
3085         if (unlikely(rc)) {
3086                 dev_err(dev, "Cannot init indirect table\n");
3087                 goto err_rss_init;
3088         }
3089
3090         for (i = 0; i < ENA_RX_RSS_TABLE_SIZE; i++) {
3091                 val = ethtool_rxfh_indir_default(i, adapter->num_queues);
3092                 rc = ena_com_indirect_table_fill_entry(ena_dev, i,
3093                                                        ENA_IO_RXQ_IDX(val));
3094                 if (unlikely(rc && (rc != -EOPNOTSUPP))) {
3095                         dev_err(dev, "Cannot fill indirect table\n");
3096                         goto err_fill_indir;
3097                 }
3098         }
3099
3100         rc = ena_com_fill_hash_function(ena_dev, ENA_ADMIN_CRC32, NULL,
3101                                         ENA_HASH_KEY_SIZE, 0xFFFFFFFF);
3102         if (unlikely(rc && (rc != -EOPNOTSUPP))) {
3103                 dev_err(dev, "Cannot fill hash function\n");
3104                 goto err_fill_indir;
3105         }
3106
3107         rc = ena_com_set_default_hash_ctrl(ena_dev);
3108         if (unlikely(rc && (rc != -EOPNOTSUPP))) {
3109                 dev_err(dev, "Cannot fill hash control\n");
3110                 goto err_fill_indir;
3111         }
3112
3113         return 0;
3114
3115 err_fill_indir:
3116         ena_com_rss_destroy(ena_dev);
3117 err_rss_init:
3118
3119         return rc;
3120 }
3121
3122 static void ena_release_bars(struct ena_com_dev *ena_dev, struct pci_dev *pdev)
3123 {
3124         int release_bars;
3125
3126         if (ena_dev->mem_bar)
3127                 devm_iounmap(&pdev->dev, ena_dev->mem_bar);
3128
3129         if (ena_dev->reg_bar)
3130                 devm_iounmap(&pdev->dev, ena_dev->reg_bar);
3131
3132         release_bars = pci_select_bars(pdev, IORESOURCE_MEM) & ENA_BAR_MASK;
3133         pci_release_selected_regions(pdev, release_bars);
3134 }
3135
3136 static int ena_calc_queue_size(struct pci_dev *pdev,
3137                                struct ena_com_dev *ena_dev,
3138                                u16 *max_tx_sgl_size,
3139                                u16 *max_rx_sgl_size,
3140                                struct ena_com_dev_get_features_ctx *get_feat_ctx)
3141 {
3142         u32 queue_size = ENA_DEFAULT_RING_SIZE;
3143
3144         queue_size = min_t(u32, queue_size,
3145                            get_feat_ctx->max_queues.max_cq_depth);
3146         queue_size = min_t(u32, queue_size,
3147                            get_feat_ctx->max_queues.max_sq_depth);
3148
3149         if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV)
3150                 queue_size = min_t(u32, queue_size,
3151                                    get_feat_ctx->max_queues.max_llq_depth);
3152
3153         queue_size = rounddown_pow_of_two(queue_size);
3154
3155         if (unlikely(!queue_size)) {
3156                 dev_err(&pdev->dev, "Invalid queue size\n");
3157                 return -EFAULT;
3158         }
3159
3160         *max_tx_sgl_size = min_t(u16, ENA_PKT_MAX_BUFS,
3161                                  get_feat_ctx->max_queues.max_packet_tx_descs);
3162         *max_rx_sgl_size = min_t(u16, ENA_PKT_MAX_BUFS,
3163                                  get_feat_ctx->max_queues.max_packet_rx_descs);
3164
3165         return queue_size;
3166 }
3167
3168 /* ena_probe - Device Initialization Routine
3169  * @pdev: PCI device information struct
3170  * @ent: entry in ena_pci_tbl
3171  *
3172  * Returns 0 on success, negative on failure
3173  *
3174  * ena_probe initializes an adapter identified by a pci_dev structure.
3175  * The OS initialization, configuring of the adapter private structure,
3176  * and a hardware reset occur.
3177  */
3178 static int ena_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3179 {
3180         struct ena_com_dev_get_features_ctx get_feat_ctx;
3181         static int version_printed;
3182         struct net_device *netdev;
3183         struct ena_adapter *adapter;
3184         struct ena_com_dev *ena_dev = NULL;
3185         static int adapters_found;
3186         int io_queue_num, bars, rc;
3187         int queue_size;
3188         u16 tx_sgl_size = 0;
3189         u16 rx_sgl_size = 0;
3190         bool wd_state;
3191
3192         dev_dbg(&pdev->dev, "%s\n", __func__);
3193
3194         if (version_printed++ == 0)
3195                 dev_info(&pdev->dev, "%s", version);
3196
3197         rc = pci_enable_device_mem(pdev);
3198         if (rc) {
3199                 dev_err(&pdev->dev, "pci_enable_device_mem() failed!\n");
3200                 return rc;
3201         }
3202
3203         pci_set_master(pdev);
3204
3205         ena_dev = vzalloc(sizeof(*ena_dev));
3206         if (!ena_dev) {
3207                 rc = -ENOMEM;
3208                 goto err_disable_device;
3209         }
3210
3211         bars = pci_select_bars(pdev, IORESOURCE_MEM) & ENA_BAR_MASK;
3212         rc = pci_request_selected_regions(pdev, bars, DRV_MODULE_NAME);
3213         if (rc) {
3214                 dev_err(&pdev->dev, "pci_request_selected_regions failed %d\n",
3215                         rc);
3216                 goto err_free_ena_dev;
3217         }
3218
3219         ena_dev->reg_bar = devm_ioremap(&pdev->dev,
3220                                         pci_resource_start(pdev, ENA_REG_BAR),
3221                                         pci_resource_len(pdev, ENA_REG_BAR));
3222         if (!ena_dev->reg_bar) {
3223                 dev_err(&pdev->dev, "failed to remap regs bar\n");
3224                 rc = -EFAULT;
3225                 goto err_free_region;
3226         }
3227
3228         ena_dev->dmadev = &pdev->dev;
3229
3230         rc = ena_device_init(ena_dev, pdev, &get_feat_ctx, &wd_state);
3231         if (rc) {
3232                 dev_err(&pdev->dev, "ena device init failed\n");
3233                 if (rc == -ETIME)
3234                         rc = -EPROBE_DEFER;
3235                 goto err_free_region;
3236         }
3237
3238         ena_set_push_mode(pdev, ena_dev, &get_feat_ctx);
3239
3240         if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) {
3241                 ena_dev->mem_bar = devm_ioremap_wc(&pdev->dev,
3242                                                    pci_resource_start(pdev, ENA_MEM_BAR),
3243                                                    pci_resource_len(pdev, ENA_MEM_BAR));
3244                 if (!ena_dev->mem_bar) {
3245                         rc = -EFAULT;
3246                         goto err_device_destroy;
3247                 }
3248         }
3249
3250         /* initial Tx interrupt delay, Assumes 1 usec granularity.
3251         * Updated during device initialization with the real granularity
3252         */
3253         ena_dev->intr_moder_tx_interval = ENA_INTR_INITIAL_TX_INTERVAL_USECS;
3254         io_queue_num = ena_calc_io_queue_num(pdev, ena_dev, &get_feat_ctx);
3255         queue_size = ena_calc_queue_size(pdev, ena_dev, &tx_sgl_size,
3256                                          &rx_sgl_size, &get_feat_ctx);
3257         if ((queue_size <= 0) || (io_queue_num <= 0)) {
3258                 rc = -EFAULT;
3259                 goto err_device_destroy;
3260         }
3261
3262         dev_info(&pdev->dev, "creating %d io queues. queue size: %d\n",
3263                  io_queue_num, queue_size);
3264
3265         /* dev zeroed in init_etherdev */
3266         netdev = alloc_etherdev_mq(sizeof(struct ena_adapter), io_queue_num);
3267         if (!netdev) {
3268                 dev_err(&pdev->dev, "alloc_etherdev_mq failed\n");
3269                 rc = -ENOMEM;
3270                 goto err_device_destroy;
3271         }
3272
3273         SET_NETDEV_DEV(netdev, &pdev->dev);
3274
3275         adapter = netdev_priv(netdev);
3276         pci_set_drvdata(pdev, adapter);
3277
3278         adapter->ena_dev = ena_dev;
3279         adapter->netdev = netdev;
3280         adapter->pdev = pdev;
3281
3282         ena_set_conf_feat_params(adapter, &get_feat_ctx);
3283
3284         adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
3285         adapter->reset_reason = ENA_REGS_RESET_NORMAL;
3286
3287         adapter->tx_ring_size = queue_size;
3288         adapter->rx_ring_size = queue_size;
3289
3290         adapter->max_tx_sgl_size = tx_sgl_size;
3291         adapter->max_rx_sgl_size = rx_sgl_size;
3292
3293         adapter->num_queues = io_queue_num;
3294         adapter->last_monitored_tx_qid = 0;
3295
3296         adapter->rx_copybreak = ENA_DEFAULT_RX_COPYBREAK;
3297         adapter->wd_state = wd_state;
3298
3299         snprintf(adapter->name, ENA_NAME_MAX_LEN, "ena_%d", adapters_found);
3300
3301         rc = ena_com_init_interrupt_moderation(adapter->ena_dev);
3302         if (rc) {
3303                 dev_err(&pdev->dev,
3304                         "Failed to query interrupt moderation feature\n");
3305                 goto err_netdev_destroy;
3306         }
3307         ena_init_io_rings(adapter);
3308
3309         netdev->netdev_ops = &ena_netdev_ops;
3310         netdev->watchdog_timeo = TX_TIMEOUT;
3311         ena_set_ethtool_ops(netdev);
3312
3313         netdev->priv_flags |= IFF_UNICAST_FLT;
3314
3315         u64_stats_init(&adapter->syncp);
3316
3317         rc = ena_enable_msix_and_set_admin_interrupts(adapter, io_queue_num);
3318         if (rc) {
3319                 dev_err(&pdev->dev,
3320                         "Failed to enable and set the admin interrupts\n");
3321                 goto err_worker_destroy;
3322         }
3323         rc = ena_rss_init_default(adapter);
3324         if (rc && (rc != -EOPNOTSUPP)) {
3325                 dev_err(&pdev->dev, "Cannot init RSS rc: %d\n", rc);
3326                 goto err_free_msix;
3327         }
3328
3329         ena_config_debug_area(adapter);
3330
3331         memcpy(adapter->netdev->perm_addr, adapter->mac_addr, netdev->addr_len);
3332
3333         netif_carrier_off(netdev);
3334
3335         rc = register_netdev(netdev);
3336         if (rc) {
3337                 dev_err(&pdev->dev, "Cannot register net device\n");
3338                 goto err_rss;
3339         }
3340
3341         INIT_WORK(&adapter->reset_task, ena_fw_reset_device);
3342
3343         adapter->last_keep_alive_jiffies = jiffies;
3344         adapter->keep_alive_timeout = ENA_DEVICE_KALIVE_TIMEOUT;
3345         adapter->missing_tx_completion_to = TX_TIMEOUT;
3346         adapter->missing_tx_completion_threshold = MAX_NUM_OF_TIMEOUTED_PACKETS;
3347
3348         ena_update_hints(adapter, &get_feat_ctx.hw_hints);
3349
3350         timer_setup(&adapter->timer_service, ena_timer_service, 0);
3351         mod_timer(&adapter->timer_service, round_jiffies(jiffies + HZ));
3352
3353         dev_info(&pdev->dev, "%s found at mem %lx, mac addr %pM Queues %d\n",
3354                  DEVICE_NAME, (long)pci_resource_start(pdev, 0),
3355                  netdev->dev_addr, io_queue_num);
3356
3357         set_bit(ENA_FLAG_DEVICE_RUNNING, &adapter->flags);
3358
3359         adapters_found++;
3360
3361         return 0;
3362
3363 err_rss:
3364         ena_com_delete_debug_area(ena_dev);
3365         ena_com_rss_destroy(ena_dev);
3366 err_free_msix:
3367         ena_com_dev_reset(ena_dev, ENA_REGS_RESET_INIT_ERR);
3368         ena_free_mgmnt_irq(adapter);
3369         ena_disable_msix(adapter);
3370 err_worker_destroy:
3371         ena_com_destroy_interrupt_moderation(ena_dev);
3372         del_timer(&adapter->timer_service);
3373 err_netdev_destroy:
3374         free_netdev(netdev);
3375 err_device_destroy:
3376         ena_com_delete_host_info(ena_dev);
3377         ena_com_admin_destroy(ena_dev);
3378 err_free_region:
3379         ena_release_bars(ena_dev, pdev);
3380 err_free_ena_dev:
3381         vfree(ena_dev);
3382 err_disable_device:
3383         pci_disable_device(pdev);
3384         return rc;
3385 }
3386
3387 /*****************************************************************************/
3388
3389 /* ena_remove - Device Removal Routine
3390  * @pdev: PCI device information struct
3391  *
3392  * ena_remove is called by the PCI subsystem to alert the driver
3393  * that it should release a PCI device.
3394  */
3395 static void ena_remove(struct pci_dev *pdev)
3396 {
3397         struct ena_adapter *adapter = pci_get_drvdata(pdev);
3398         struct ena_com_dev *ena_dev;
3399         struct net_device *netdev;
3400
3401         ena_dev = adapter->ena_dev;
3402         netdev = adapter->netdev;
3403
3404 #ifdef CONFIG_RFS_ACCEL
3405         if ((adapter->msix_vecs >= 1) && (netdev->rx_cpu_rmap)) {
3406                 free_irq_cpu_rmap(netdev->rx_cpu_rmap);
3407                 netdev->rx_cpu_rmap = NULL;
3408         }
3409 #endif /* CONFIG_RFS_ACCEL */
3410         del_timer_sync(&adapter->timer_service);
3411
3412         cancel_work_sync(&adapter->reset_task);
3413
3414         unregister_netdev(netdev);
3415
3416         /* If the device is running then we want to make sure the device will be
3417          * reset to make sure no more events will be issued by the device.
3418          */
3419         if (test_bit(ENA_FLAG_DEVICE_RUNNING, &adapter->flags))
3420                 set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
3421
3422         rtnl_lock();
3423         ena_destroy_device(adapter, true);
3424         rtnl_unlock();
3425
3426         free_netdev(netdev);
3427
3428         ena_com_rss_destroy(ena_dev);
3429
3430         ena_com_delete_debug_area(ena_dev);
3431
3432         ena_com_delete_host_info(ena_dev);
3433
3434         ena_release_bars(ena_dev, pdev);
3435
3436         pci_disable_device(pdev);
3437
3438         ena_com_destroy_interrupt_moderation(ena_dev);
3439
3440         vfree(ena_dev);
3441 }
3442
3443 #ifdef CONFIG_PM
3444 /* ena_suspend - PM suspend callback
3445  * @pdev: PCI device information struct
3446  * @state:power state
3447  */
3448 static int ena_suspend(struct pci_dev *pdev,  pm_message_t state)
3449 {
3450         struct ena_adapter *adapter = pci_get_drvdata(pdev);
3451
3452         u64_stats_update_begin(&adapter->syncp);
3453         adapter->dev_stats.suspend++;
3454         u64_stats_update_end(&adapter->syncp);
3455
3456         rtnl_lock();
3457         if (unlikely(test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags))) {
3458                 dev_err(&pdev->dev,
3459                         "ignoring device reset request as the device is being suspended\n");
3460                 clear_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
3461         }
3462         ena_destroy_device(adapter, true);
3463         rtnl_unlock();
3464         return 0;
3465 }
3466
3467 /* ena_resume - PM resume callback
3468  * @pdev: PCI device information struct
3469  *
3470  */
3471 static int ena_resume(struct pci_dev *pdev)
3472 {
3473         struct ena_adapter *adapter = pci_get_drvdata(pdev);
3474         int rc;
3475
3476         u64_stats_update_begin(&adapter->syncp);
3477         adapter->dev_stats.resume++;
3478         u64_stats_update_end(&adapter->syncp);
3479
3480         rtnl_lock();
3481         rc = ena_restore_device(adapter);
3482         rtnl_unlock();
3483         return rc;
3484 }
3485 #endif
3486
3487 static struct pci_driver ena_pci_driver = {
3488         .name           = DRV_MODULE_NAME,
3489         .id_table       = ena_pci_tbl,
3490         .probe          = ena_probe,
3491         .remove         = ena_remove,
3492 #ifdef CONFIG_PM
3493         .suspend    = ena_suspend,
3494         .resume     = ena_resume,
3495 #endif
3496         .sriov_configure = pci_sriov_configure_simple,
3497 };
3498
3499 static int __init ena_init(void)
3500 {
3501         pr_info("%s", version);
3502
3503         ena_wq = create_singlethread_workqueue(DRV_MODULE_NAME);
3504         if (!ena_wq) {
3505                 pr_err("Failed to create workqueue\n");
3506                 return -ENOMEM;
3507         }
3508
3509         return pci_register_driver(&ena_pci_driver);
3510 }
3511
3512 static void __exit ena_cleanup(void)
3513 {
3514         pci_unregister_driver(&ena_pci_driver);
3515
3516         if (ena_wq) {
3517                 destroy_workqueue(ena_wq);
3518                 ena_wq = NULL;
3519         }
3520 }
3521
3522 /******************************************************************************
3523  ******************************** AENQ Handlers *******************************
3524  *****************************************************************************/
3525 /* ena_update_on_link_change:
3526  * Notify the network interface about the change in link status
3527  */
3528 static void ena_update_on_link_change(void *adapter_data,
3529                                       struct ena_admin_aenq_entry *aenq_e)
3530 {
3531         struct ena_adapter *adapter = (struct ena_adapter *)adapter_data;
3532         struct ena_admin_aenq_link_change_desc *aenq_desc =
3533                 (struct ena_admin_aenq_link_change_desc *)aenq_e;
3534         int status = aenq_desc->flags &
3535                 ENA_ADMIN_AENQ_LINK_CHANGE_DESC_LINK_STATUS_MASK;
3536
3537         if (status) {
3538                 netdev_dbg(adapter->netdev, "%s\n", __func__);
3539                 set_bit(ENA_FLAG_LINK_UP, &adapter->flags);
3540                 if (!test_bit(ENA_FLAG_ONGOING_RESET, &adapter->flags))
3541                         netif_carrier_on(adapter->netdev);
3542         } else {
3543                 clear_bit(ENA_FLAG_LINK_UP, &adapter->flags);
3544                 netif_carrier_off(adapter->netdev);
3545         }
3546 }
3547
3548 static void ena_keep_alive_wd(void *adapter_data,
3549                               struct ena_admin_aenq_entry *aenq_e)
3550 {
3551         struct ena_adapter *adapter = (struct ena_adapter *)adapter_data;
3552         struct ena_admin_aenq_keep_alive_desc *desc;
3553         u64 rx_drops;
3554
3555         desc = (struct ena_admin_aenq_keep_alive_desc *)aenq_e;
3556         adapter->last_keep_alive_jiffies = jiffies;
3557
3558         rx_drops = ((u64)desc->rx_drops_high << 32) | desc->rx_drops_low;
3559
3560         u64_stats_update_begin(&adapter->syncp);
3561         adapter->dev_stats.rx_drops = rx_drops;
3562         u64_stats_update_end(&adapter->syncp);
3563 }
3564
3565 static void ena_notification(void *adapter_data,
3566                              struct ena_admin_aenq_entry *aenq_e)
3567 {
3568         struct ena_adapter *adapter = (struct ena_adapter *)adapter_data;
3569         struct ena_admin_ena_hw_hints *hints;
3570
3571         WARN(aenq_e->aenq_common_desc.group != ENA_ADMIN_NOTIFICATION,
3572              "Invalid group(%x) expected %x\n",
3573              aenq_e->aenq_common_desc.group,
3574              ENA_ADMIN_NOTIFICATION);
3575
3576         switch (aenq_e->aenq_common_desc.syndrom) {
3577         case ENA_ADMIN_UPDATE_HINTS:
3578                 hints = (struct ena_admin_ena_hw_hints *)
3579                         (&aenq_e->inline_data_w4);
3580                 ena_update_hints(adapter, hints);
3581                 break;
3582         default:
3583                 netif_err(adapter, drv, adapter->netdev,
3584                           "Invalid aenq notification link state %d\n",
3585                           aenq_e->aenq_common_desc.syndrom);
3586         }
3587 }
3588
3589 /* This handler will called for unknown event group or unimplemented handlers*/
3590 static void unimplemented_aenq_handler(void *data,
3591                                        struct ena_admin_aenq_entry *aenq_e)
3592 {
3593         struct ena_adapter *adapter = (struct ena_adapter *)data;
3594
3595         netif_err(adapter, drv, adapter->netdev,
3596                   "Unknown event was received or event with unimplemented handler\n");
3597 }
3598
3599 static struct ena_aenq_handlers aenq_handlers = {
3600         .handlers = {
3601                 [ENA_ADMIN_LINK_CHANGE] = ena_update_on_link_change,
3602                 [ENA_ADMIN_NOTIFICATION] = ena_notification,
3603                 [ENA_ADMIN_KEEP_ALIVE] = ena_keep_alive_wd,
3604         },
3605         .unimplemented_handler = unimplemented_aenq_handler
3606 };
3607
3608 module_init(ena_init);
3609 module_exit(ena_cleanup);