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

   1 /*
   2  * Copyright 2015 Amazon.com, Inc. or its affiliates.
   3  *
   4  * This software is available to you under a choice of one of two
   5  * licenses.  You may choose to be licensed under the terms of the GNU
   6  * General Public License (GPL) Version 2, available from the file
   7  * COPYING in the main directory of this source tree, or the
   8  * BSD license below:
   9  *
  10  *     Redistribution and use in source and binary forms, with or
  11  *     without modification, are permitted provided that the following
  12  *     conditions are met:
  13  *
  14  *      - Redistributions of source code must retain the above
  15  *        copyright notice, this list of conditions and the following
  16  *        disclaimer.
  17  *
  18  *      - Redistributions in binary form must reproduce the above
  19  *        copyright notice, this list of conditions and the following
  20  *        disclaimer in the documentation and/or other materials
  21  *        provided with the distribution.
  22  *
  23  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  24  * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  25  * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  26  * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
  27  * BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
  28  * ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
  29  * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
  30  * SOFTWARE.
  31  */
  32
  33 #define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
  34
  35 #ifdef CONFIG_RFS_ACCEL
  36 #include <linux/cpu_rmap.h>
  37 #endif /* CONFIG_RFS_ACCEL */
  38 #include <linux/ethtool.h>
  39 #include <linux/if_vlan.h>
  40 #include <linux/kernel.h>
  41 #include <linux/module.h>
  42 #include <linux/moduleparam.h>
  43 #include <linux/numa.h>
  44 #include <linux/pci.h>
  45 #include <linux/utsname.h>
  46 #include <linux/version.h>
  47 #include <linux/vmalloc.h>
  48 #include <net/ip.h>
  49
  50 #include "ena_netdev.h"
  51 #include "ena_pci_id_tbl.h"
  52
  53 static char version[] = DEVICE_NAME " v" DRV_MODULE_VERSION "\n";
  54
  55 MODULE_AUTHOR("Amazon.com, Inc. or its affiliates");
  56 MODULE_DESCRIPTION(DEVICE_NAME);
  57 MODULE_LICENSE("GPL");
  58 MODULE_VERSION(DRV_MODULE_VERSION);
  59
  60 /* Time in jiffies before concluding the transmitter is hung. */
  61 #define TX_TIMEOUT  (5 * HZ)
  62
  63 #define ENA_NAPI_BUDGET 64
  64
  65 #define DEFAULT_MSG_ENABLE (NETIF_MSG_DRV | NETIF_MSG_PROBE | NETIF_MSG_IFUP | \
  66                 NETIF_MSG_TX_DONE | NETIF_MSG_TX_ERR | NETIF_MSG_RX_ERR)
  67 static int debug = -1;
  68 module_param(debug, int, 0);
  69 MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
  70
  71 static struct ena_aenq_handlers aenq_handlers;
  72
  73 static struct workqueue_struct *ena_wq;
  74
  75 MODULE_DEVICE_TABLE(pci, ena_pci_tbl);
  76
  77 static int ena_rss_init_default(struct ena_adapter *adapter);
  78
  79 static void ena_tx_timeout(struct net_device *dev)
  80 {
  81         struct ena_adapter *adapter = netdev_priv(dev);
  82
  83         /* Change the state of the device to trigger reset
  84          * Check that we are not in the middle or a trigger already
  85          */
  86
  87         if (test_and_set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags))
  88                 return;
  89
  90         adapter->reset_reason = ENA_REGS_RESET_OS_NETDEV_WD;
  91         u64_stats_update_begin(&adapter->syncp);
  92         adapter->dev_stats.tx_timeout++;
  93         u64_stats_update_end(&adapter->syncp);
  94
  95         netif_err(adapter, tx_err, dev, "Transmit time out\n");
  96 }
  97
  98 static void update_rx_ring_mtu(struct ena_adapter *adapter, int mtu)
  99 {
 100         int i;
 101
 102         for (i = 0; i < adapter->num_queues; i++)
 103                 adapter->rx_ring[i].mtu = mtu;
 104 }
 105
 106 static int ena_change_mtu(struct net_device *dev, int new_mtu)
 107 {
 108         struct ena_adapter *adapter = netdev_priv(dev);
 109         int ret;
 110
 111         ret = ena_com_set_dev_mtu(adapter->ena_dev, new_mtu);
 112         if (!ret) {
 113                 netif_dbg(adapter, drv, dev, "set MTU to %d\n", new_mtu);
 114                 update_rx_ring_mtu(adapter, new_mtu);
 115                 dev->mtu = new_mtu;
 116         } else {
 117                 netif_err(adapter, drv, dev, "Failed to set MTU to %d\n",
 118                           new_mtu);
 119         }
 120
 121         return ret;
 122 }
 123
 124 static int ena_init_rx_cpu_rmap(struct ena_adapter *adapter)
 125 {
 126 #ifdef CONFIG_RFS_ACCEL
 127         u32 i;
 128         int rc;
 129
 130         adapter->netdev->rx_cpu_rmap = alloc_irq_cpu_rmap(adapter->num_queues);
 131         if (!adapter->netdev->rx_cpu_rmap)
 132                 return -ENOMEM;
 133         for (i = 0; i < adapter->num_queues; i++) {
 134                 int irq_idx = ENA_IO_IRQ_IDX(i);
 135
 136                 rc = irq_cpu_rmap_add(adapter->netdev->rx_cpu_rmap,
 137                                       pci_irq_vector(adapter->pdev, irq_idx));
 138                 if (rc) {
 139                         free_irq_cpu_rmap(adapter->netdev->rx_cpu_rmap);
 140                         adapter->netdev->rx_cpu_rmap = NULL;
 141                         return rc;
 142                 }
 143         }
 144 #endif /* CONFIG_RFS_ACCEL */
 145         return 0;
 146 }
 147
 148 static void ena_init_io_rings_common(struct ena_adapter *adapter,
 149                                      struct ena_ring *ring, u16 qid)
 150 {
 151         ring->qid = qid;
 152         ring->pdev = adapter->pdev;
 153         ring->dev = &adapter->pdev->dev;
 154         ring->netdev = adapter->netdev;
 155         ring->napi = &adapter->ena_napi[qid].napi;
 156         ring->adapter = adapter;
 157         ring->ena_dev = adapter->ena_dev;
 158         ring->per_napi_packets = 0;
 159         ring->per_napi_bytes = 0;
 160         ring->cpu = 0;
 161         u64_stats_init(&ring->syncp);
 162 }
 163
 164 static void ena_init_io_rings(struct ena_adapter *adapter)
 165 {
 166         struct ena_com_dev *ena_dev;
 167         struct ena_ring *txr, *rxr;
 168         int i;
 169
 170         ena_dev = adapter->ena_dev;
 171
 172         for (i = 0; i < adapter->num_queues; i++) {
 173                 txr = &adapter->tx_ring[i];
 174                 rxr = &adapter->rx_ring[i];
 175
 176                 /* TX/RX common ring state */
 177                 ena_init_io_rings_common(adapter, txr, i);
 178                 ena_init_io_rings_common(adapter, rxr, i);
 179
 180                 /* TX specific ring state */
 181                 txr->ring_size = adapter->tx_ring_size;
 182                 txr->tx_max_header_size = ena_dev->tx_max_header_size;
 183                 txr->tx_mem_queue_type = ena_dev->tx_mem_queue_type;
 184                 txr->sgl_size = adapter->max_tx_sgl_size;
 185                 txr->smoothed_interval =
 186                         ena_com_get_nonadaptive_moderation_interval_tx(ena_dev);
 187
 188                 /* RX specific ring state */
 189                 rxr->ring_size = adapter->rx_ring_size;
 190                 rxr->rx_copybreak = adapter->rx_copybreak;
 191                 rxr->sgl_size = adapter->max_rx_sgl_size;
 192                 rxr->smoothed_interval =
 193                         ena_com_get_nonadaptive_moderation_interval_rx(ena_dev);
 194                 rxr->empty_rx_queue = 0;
 195         }
 196 }
 197
 198 /* ena_setup_tx_resources - allocate I/O Tx resources (Descriptors)
 199  * @adapter: network interface device structure
 200  * @qid: queue index
 201  *
 202  * Return 0 on success, negative on failure
 203  */
 204 static int ena_setup_tx_resources(struct ena_adapter *adapter, int qid)
 205 {
 206         struct ena_ring *tx_ring = &adapter->tx_ring[qid];
 207         struct ena_irq *ena_irq = &adapter->irq_tbl[ENA_IO_IRQ_IDX(qid)];
 208         int size, i, node;
 209
 210         if (tx_ring->tx_buffer_info) {
 211                 netif_err(adapter, ifup,
 212                           adapter->netdev, "tx_buffer_info info is not NULL");
 213                 return -EEXIST;
 214         }
 215
 216         size = sizeof(struct ena_tx_buffer) * tx_ring->ring_size;
 217         node = cpu_to_node(ena_irq->cpu);
 218
 219         tx_ring->tx_buffer_info = vzalloc_node(size, node);
 220         if (!tx_ring->tx_buffer_info) {
 221                 tx_ring->tx_buffer_info = vzalloc(size);
 222                 if (!tx_ring->tx_buffer_info)
 223                         return -ENOMEM;
 224         }
 225
 226         size = sizeof(u16) * tx_ring->ring_size;
 227         tx_ring->free_tx_ids = vzalloc_node(size, node);
 228         if (!tx_ring->free_tx_ids) {
 229                 tx_ring->free_tx_ids = vzalloc(size);
 230                 if (!tx_ring->free_tx_ids) {
 231                         vfree(tx_ring->tx_buffer_info);
 232                         return -ENOMEM;
 233                 }
 234         }
 235
 236         /* Req id ring for TX out of order completions */
 237         for (i = 0; i < tx_ring->ring_size; i++)
 238                 tx_ring->free_tx_ids[i] = i;
 239
 240         /* Reset tx statistics */
 241         memset(&tx_ring->tx_stats, 0x0, sizeof(tx_ring->tx_stats));
 242
 243         tx_ring->next_to_use = 0;
 244         tx_ring->next_to_clean = 0;
 245         tx_ring->cpu = ena_irq->cpu;
 246         return 0;
 247 }
 248
 249 /* ena_free_tx_resources - Free I/O Tx Resources per Queue
 250  * @adapter: network interface device structure
 251  * @qid: queue index
 252  *
 253  * Free all transmit software resources
 254  */
 255 static void ena_free_tx_resources(struct ena_adapter *adapter, int qid)
 256 {
 257         struct ena_ring *tx_ring = &adapter->tx_ring[qid];
 258
 259         vfree(tx_ring->tx_buffer_info);
 260         tx_ring->tx_buffer_info = NULL;
 261
 262         vfree(tx_ring->free_tx_ids);
 263         tx_ring->free_tx_ids = NULL;
 264 }
 265
 266 /* ena_setup_all_tx_resources - allocate I/O Tx queues resources for All queues
 267  * @adapter: private structure
 268  *
 269  * Return 0 on success, negative on failure
 270  */
 271 static int ena_setup_all_tx_resources(struct ena_adapter *adapter)
 272 {
 273         int i, rc = 0;
 274
 275         for (i = 0; i < adapter->num_queues; i++) {
 276                 rc = ena_setup_tx_resources(adapter, i);
 277                 if (rc)
 278                         goto err_setup_tx;
 279         }
 280
 281         return 0;
 282
 283 err_setup_tx:
 284
 285         netif_err(adapter, ifup, adapter->netdev,
 286                   "Tx queue %d: allocation failed\n", i);
 287
 288         /* rewind the index freeing the rings as we go */
 289         while (i--)
 290                 ena_free_tx_resources(adapter, i);
 291         return rc;
 292 }
 293
 294 /* ena_free_all_io_tx_resources - Free I/O Tx Resources for All Queues
 295  * @adapter: board private structure
 296  *
 297  * Free all transmit software resources
 298  */
 299 static void ena_free_all_io_tx_resources(struct ena_adapter *adapter)
 300 {
 301         int i;
 302
 303         for (i = 0; i < adapter->num_queues; i++)
 304                 ena_free_tx_resources(adapter, i);
 305 }
 306
 307 static inline int validate_rx_req_id(struct ena_ring *rx_ring, u16 req_id)
 308 {
 309         if (likely(req_id < rx_ring->ring_size))
 310                 return 0;
 311
 312         netif_err(rx_ring->adapter, rx_err, rx_ring->netdev,
 313                   "Invalid rx req_id: %hu\n", req_id);
 314
 315         u64_stats_update_begin(&rx_ring->syncp);
 316         rx_ring->rx_stats.bad_req_id++;
 317         u64_stats_update_end(&rx_ring->syncp);
 318
 319         /* Trigger device reset */
 320         rx_ring->adapter->reset_reason = ENA_REGS_RESET_INV_RX_REQ_ID;
 321         set_bit(ENA_FLAG_TRIGGER_RESET, &rx_ring->adapter->flags);
 322         return -EFAULT;
 323 }
 324
 325 /* ena_setup_rx_resources - allocate I/O Rx resources (Descriptors)
 326  * @adapter: network interface device structure
 327  * @qid: queue index
 328  *
 329  * Returns 0 on success, negative on failure
 330  */
 331 static int ena_setup_rx_resources(struct ena_adapter *adapter,
 332                                   u32 qid)
 333 {
 334         struct ena_ring *rx_ring = &adapter->rx_ring[qid];
 335         struct ena_irq *ena_irq = &adapter->irq_tbl[ENA_IO_IRQ_IDX(qid)];
 336         int size, node, i;
 337
 338         if (rx_ring->rx_buffer_info) {
 339                 netif_err(adapter, ifup, adapter->netdev,
 340                           "rx_buffer_info is not NULL");
 341                 return -EEXIST;
 342         }
 343
 344         /* alloc extra element so in rx path
 345          * we can always prefetch rx_info + 1
 346          */
 347         size = sizeof(struct ena_rx_buffer) * (rx_ring->ring_size + 1);
 348         node = cpu_to_node(ena_irq->cpu);
 349
 350         rx_ring->rx_buffer_info = vzalloc_node(size, node);
 351         if (!rx_ring->rx_buffer_info) {
 352                 rx_ring->rx_buffer_info = vzalloc(size);
 353                 if (!rx_ring->rx_buffer_info)
 354                         return -ENOMEM;
 355         }
 356
 357         size = sizeof(u16) * rx_ring->ring_size;
 358         rx_ring->free_rx_ids = vzalloc_node(size, node);
 359         if (!rx_ring->free_rx_ids) {
 360                 rx_ring->free_rx_ids = vzalloc(size);
 361                 if (!rx_ring->free_rx_ids) {
 362                         vfree(rx_ring->rx_buffer_info);
 363                         return -ENOMEM;
 364                 }
 365         }
 366
 367         /* Req id ring for receiving RX pkts out of order */
 368         for (i = 0; i < rx_ring->ring_size; i++)
 369                 rx_ring->free_rx_ids[i] = i;
 370
 371         /* Reset rx statistics */
 372         memset(&rx_ring->rx_stats, 0x0, sizeof(rx_ring->rx_stats));
 373
 374         rx_ring->next_to_clean = 0;
 375         rx_ring->next_to_use = 0;
 376         rx_ring->cpu = ena_irq->cpu;
 377
 378         return 0;
 379 }
 380
 381 /* ena_free_rx_resources - Free I/O Rx Resources
 382  * @adapter: network interface device structure
 383  * @qid: queue index
 384  *
 385  * Free all receive software resources
 386  */
 387 static void ena_free_rx_resources(struct ena_adapter *adapter,
 388                                   u32 qid)
 389 {
 390         struct ena_ring *rx_ring = &adapter->rx_ring[qid];
 391
 392         vfree(rx_ring->rx_buffer_info);
 393         rx_ring->rx_buffer_info = NULL;
 394
 395         vfree(rx_ring->free_rx_ids);
 396         rx_ring->free_rx_ids = NULL;
 397 }
 398
 399 /* ena_setup_all_rx_resources - allocate I/O Rx queues resources for all queues
 400  * @adapter: board private structure
 401  *
 402  * Return 0 on success, negative on failure
 403  */
 404 static int ena_setup_all_rx_resources(struct ena_adapter *adapter)
 405 {
 406         int i, rc = 0;
 407
 408         for (i = 0; i < adapter->num_queues; i++) {
 409                 rc = ena_setup_rx_resources(adapter, i);
 410                 if (rc)
 411                         goto err_setup_rx;
 412         }
 413
 414         return 0;
 415
 416 err_setup_rx:
 417
 418         netif_err(adapter, ifup, adapter->netdev,
 419                   "Rx queue %d: allocation failed\n", i);
 420
 421         /* rewind the index freeing the rings as we go */
 422         while (i--)
 423                 ena_free_rx_resources(adapter, i);
 424         return rc;
 425 }
 426
 427 /* ena_free_all_io_rx_resources - Free I/O Rx Resources for All Queues
 428  * @adapter: board private structure
 429  *
 430  * Free all receive software resources
 431  */
 432 static void ena_free_all_io_rx_resources(struct ena_adapter *adapter)
 433 {
 434         int i;
 435
 436         for (i = 0; i < adapter->num_queues; i++)
 437                 ena_free_rx_resources(adapter, i);
 438 }
 439
 440 static inline int ena_alloc_rx_page(struct ena_ring *rx_ring,
 441                                     struct ena_rx_buffer *rx_info, gfp_t gfp)
 442 {
 443         struct ena_com_buf *ena_buf;
 444         struct page *page;
 445         dma_addr_t dma;
 446
 447         /* if previous allocated page is not used */
 448         if (unlikely(rx_info->page))
 449                 return 0;
 450
 451         page = alloc_page(gfp);
 452         if (unlikely(!page)) {
 453                 u64_stats_update_begin(&rx_ring->syncp);
 454                 rx_ring->rx_stats.page_alloc_fail++;
 455                 u64_stats_update_end(&rx_ring->syncp);
 456                 return -ENOMEM;
 457         }
 458
 459         dma = dma_map_page(rx_ring->dev, page, 0, PAGE_SIZE,
 460                            DMA_FROM_DEVICE);
 461         if (unlikely(dma_mapping_error(rx_ring->dev, dma))) {
 462                 u64_stats_update_begin(&rx_ring->syncp);
 463                 rx_ring->rx_stats.dma_mapping_err++;
 464                 u64_stats_update_end(&rx_ring->syncp);
 465
 466                 __free_page(page);
 467                 return -EIO;
 468         }
 469         netif_dbg(rx_ring->adapter, rx_status, rx_ring->netdev,
 470                   "alloc page %p, rx_info %p\n", page, rx_info);
 471
 472         rx_info->page = page;
 473         rx_info->page_offset = 0;
 474         ena_buf = &rx_info->ena_buf;
 475         ena_buf->paddr = dma;
 476         ena_buf->len = PAGE_SIZE;
 477
 478         return 0;
 479 }
 480
 481 static void ena_free_rx_page(struct ena_ring *rx_ring,
 482                              struct ena_rx_buffer *rx_info)
 483 {
 484         struct page *page = rx_info->page;
 485         struct ena_com_buf *ena_buf = &rx_info->ena_buf;
 486
 487         if (unlikely(!page)) {
 488                 netif_warn(rx_ring->adapter, rx_err, rx_ring->netdev,
 489                            "Trying to free unallocated buffer\n");
 490                 return;
 491         }
 492
 493         dma_unmap_page(rx_ring->dev, ena_buf->paddr, PAGE_SIZE,
 494                        DMA_FROM_DEVICE);
 495
 496         __free_page(page);
 497         rx_info->page = NULL;
 498 }
 499
 500 static int ena_refill_rx_bufs(struct ena_ring *rx_ring, u32 num)
 501 {
 502         u16 next_to_use, req_id;
 503         u32 i;
 504         int rc;
 505
 506         next_to_use = rx_ring->next_to_use;
 507
 508         for (i = 0; i < num; i++) {
 509                 struct ena_rx_buffer *rx_info;
 510
 511                 req_id = rx_ring->free_rx_ids[next_to_use];
 512                 rc = validate_rx_req_id(rx_ring, req_id);
 513                 if (unlikely(rc < 0))
 514                         break;
 515
 516                 rx_info = &rx_ring->rx_buffer_info[req_id];
 517
 518
 519                 rc = ena_alloc_rx_page(rx_ring, rx_info,
 520                                        __GFP_COLD | GFP_ATOMIC | __GFP_COMP);
 521                 if (unlikely(rc < 0)) {
 522                         netif_warn(rx_ring->adapter, rx_err, rx_ring->netdev,
 523                                    "failed to alloc buffer for rx queue %d\n",
 524                                    rx_ring->qid);
 525                         break;
 526                 }
 527                 rc = ena_com_add_single_rx_desc(rx_ring->ena_com_io_sq,
 528                                                 &rx_info->ena_buf,
 529                                                 req_id);
 530                 if (unlikely(rc)) {
 531                         netif_warn(rx_ring->adapter, rx_status, rx_ring->netdev,
 532                                    "failed to add buffer for rx queue %d\n",
 533                                    rx_ring->qid);
 534                         break;
 535                 }
 536                 next_to_use = ENA_RX_RING_IDX_NEXT(next_to_use,
 537                                                    rx_ring->ring_size);
 538         }
 539
 540         if (unlikely(i < num)) {
 541                 u64_stats_update_begin(&rx_ring->syncp);
 542                 rx_ring->rx_stats.refil_partial++;
 543                 u64_stats_update_end(&rx_ring->syncp);
 544                 netdev_warn(rx_ring->netdev,
 545                             "refilled rx qid %d with only %d buffers (from %d)\n",
 546                             rx_ring->qid, i, num);
 547         }
 548
 549         if (likely(i)) {
 550                 /* Add memory barrier to make sure the desc were written before
 551                  * issue a doorbell
 552                  */
 553                 wmb();
 554                 ena_com_write_sq_doorbell(rx_ring->ena_com_io_sq);
 555         }
 556
 557         rx_ring->next_to_use = next_to_use;
 558
 559         return i;
 560 }
 561
 562 static void ena_free_rx_bufs(struct ena_adapter *adapter,
 563                              u32 qid)
 564 {
 565         struct ena_ring *rx_ring = &adapter->rx_ring[qid];
 566         u32 i;
 567
 568         for (i = 0; i < rx_ring->ring_size; i++) {
 569                 struct ena_rx_buffer *rx_info = &rx_ring->rx_buffer_info[i];
 570
 571                 if (rx_info->page)
 572                         ena_free_rx_page(rx_ring, rx_info);
 573         }
 574 }
 575
 576 /* ena_refill_all_rx_bufs - allocate all queues Rx buffers
 577  * @adapter: board private structure
 578  *
 579  */
 580 static void ena_refill_all_rx_bufs(struct ena_adapter *adapter)
 581 {
 582         struct ena_ring *rx_ring;
 583         int i, rc, bufs_num;
 584
 585         for (i = 0; i < adapter->num_queues; i++) {
 586                 rx_ring = &adapter->rx_ring[i];
 587                 bufs_num = rx_ring->ring_size - 1;
 588                 rc = ena_refill_rx_bufs(rx_ring, bufs_num);
 589
 590                 if (unlikely(rc != bufs_num))
 591                         netif_warn(rx_ring->adapter, rx_status, rx_ring->netdev,
 592                                    "refilling Queue %d failed. allocated %d buffers from: %d\n",
 593                                    i, rc, bufs_num);
 594         }
 595 }
 596
 597 static void ena_free_all_rx_bufs(struct ena_adapter *adapter)
 598 {
 599         int i;
 600
 601         for (i = 0; i < adapter->num_queues; i++)
 602                 ena_free_rx_bufs(adapter, i);
 603 }
 604
 605 /* ena_free_tx_bufs - Free Tx Buffers per Queue
 606  * @tx_ring: TX ring for which buffers be freed
 607  */
 608 static void ena_free_tx_bufs(struct ena_ring *tx_ring)
 609 {
 610         bool print_once = true;
 611         u32 i;
 612
 613         for (i = 0; i < tx_ring->ring_size; i++) {
 614                 struct ena_tx_buffer *tx_info = &tx_ring->tx_buffer_info[i];
 615                 struct ena_com_buf *ena_buf;
 616                 int nr_frags;
 617                 int j;
 618
 619                 if (!tx_info->skb)
 620                         continue;
 621
 622                 if (print_once) {
 623                         netdev_notice(tx_ring->netdev,
 624                                       "free uncompleted tx skb qid %d idx 0x%x\n",
 625                                       tx_ring->qid, i);
 626                         print_once = false;
 627                 } else {
 628                         netdev_dbg(tx_ring->netdev,
 629                                    "free uncompleted tx skb qid %d idx 0x%x\n",
 630                                    tx_ring->qid, i);
 631                 }
 632
 633                 ena_buf = tx_info->bufs;
 634                 dma_unmap_single(tx_ring->dev,
 635                                  ena_buf->paddr,
 636                                  ena_buf->len,
 637                                  DMA_TO_DEVICE);
 638
 639                 /* unmap remaining mapped pages */
 640                 nr_frags = tx_info->num_of_bufs - 1;
 641                 for (j = 0; j < nr_frags; j++) {
 642                         ena_buf++;
 643                         dma_unmap_page(tx_ring->dev,
 644                                        ena_buf->paddr,
 645                                        ena_buf->len,
 646                                        DMA_TO_DEVICE);
 647                 }
 648
 649                 dev_kfree_skb_any(tx_info->skb);
 650         }
 651         netdev_tx_reset_queue(netdev_get_tx_queue(tx_ring->netdev,
 652                                                   tx_ring->qid));
 653 }
 654
 655 static void ena_free_all_tx_bufs(struct ena_adapter *adapter)
 656 {
 657         struct ena_ring *tx_ring;
 658         int i;
 659
 660         for (i = 0; i < adapter->num_queues; i++) {
 661                 tx_ring = &adapter->tx_ring[i];
 662                 ena_free_tx_bufs(tx_ring);
 663         }
 664 }
 665
 666 static void ena_destroy_all_tx_queues(struct ena_adapter *adapter)
 667 {
 668         u16 ena_qid;
 669         int i;
 670
 671         for (i = 0; i < adapter->num_queues; i++) {
 672                 ena_qid = ENA_IO_TXQ_IDX(i);
 673                 ena_com_destroy_io_queue(adapter->ena_dev, ena_qid);
 674         }
 675 }
 676
 677 static void ena_destroy_all_rx_queues(struct ena_adapter *adapter)
 678 {
 679         u16 ena_qid;
 680         int i;
 681
 682         for (i = 0; i < adapter->num_queues; i++) {
 683                 ena_qid = ENA_IO_RXQ_IDX(i);
 684                 ena_com_destroy_io_queue(adapter->ena_dev, ena_qid);
 685         }
 686 }
 687
 688 static void ena_destroy_all_io_queues(struct ena_adapter *adapter)
 689 {
 690         ena_destroy_all_tx_queues(adapter);
 691         ena_destroy_all_rx_queues(adapter);
 692 }
 693
 694 static int validate_tx_req_id(struct ena_ring *tx_ring, u16 req_id)
 695 {
 696         struct ena_tx_buffer *tx_info = NULL;
 697
 698         if (likely(req_id < tx_ring->ring_size)) {
 699                 tx_info = &tx_ring->tx_buffer_info[req_id];
 700                 if (likely(tx_info->skb))
 701                         return 0;
 702         }
 703
 704         if (tx_info)
 705                 netif_err(tx_ring->adapter, tx_done, tx_ring->netdev,
 706                           "tx_info doesn't have valid skb\n");
 707         else
 708                 netif_err(tx_ring->adapter, tx_done, tx_ring->netdev,
 709                           "Invalid req_id: %hu\n", req_id);
 710
 711         u64_stats_update_begin(&tx_ring->syncp);
 712         tx_ring->tx_stats.bad_req_id++;
 713         u64_stats_update_end(&tx_ring->syncp);
 714
 715         /* Trigger device reset */
 716         tx_ring->adapter->reset_reason = ENA_REGS_RESET_INV_TX_REQ_ID;
 717         set_bit(ENA_FLAG_TRIGGER_RESET, &tx_ring->adapter->flags);
 718         return -EFAULT;
 719 }
 720
 721 static int ena_clean_tx_irq(struct ena_ring *tx_ring, u32 budget)
 722 {
 723         struct netdev_queue *txq;
 724         bool above_thresh;
 725         u32 tx_bytes = 0;
 726         u32 total_done = 0;
 727         u16 next_to_clean;
 728         u16 req_id;
 729         int tx_pkts = 0;
 730         int rc;
 731
 732         next_to_clean = tx_ring->next_to_clean;
 733         txq = netdev_get_tx_queue(tx_ring->netdev, tx_ring->qid);
 734
 735         while (tx_pkts < budget) {
 736                 struct ena_tx_buffer *tx_info;
 737                 struct sk_buff *skb;
 738                 struct ena_com_buf *ena_buf;
 739                 int i, nr_frags;
 740
 741                 rc = ena_com_tx_comp_req_id_get(tx_ring->ena_com_io_cq,
 742                                                 &req_id);
 743                 if (rc)
 744                         break;
 745
 746                 rc = validate_tx_req_id(tx_ring, req_id);
 747                 if (rc)
 748                         break;
 749
 750                 tx_info = &tx_ring->tx_buffer_info[req_id];
 751                 skb = tx_info->skb;
 752
 753                 /* prefetch skb_end_pointer() to speedup skb_shinfo(skb) */
 754                 prefetch(&skb->end);
 755
 756                 tx_info->skb = NULL;
 757                 tx_info->last_jiffies = 0;
 758
 759                 if (likely(tx_info->num_of_bufs != 0)) {
 760                         ena_buf = tx_info->bufs;
 761
 762                         dma_unmap_single(tx_ring->dev,
 763                                          dma_unmap_addr(ena_buf, paddr),
 764                                          dma_unmap_len(ena_buf, len),
 765                                          DMA_TO_DEVICE);
 766
 767                         /* unmap remaining mapped pages */
 768                         nr_frags = tx_info->num_of_bufs - 1;
 769                         for (i = 0; i < nr_frags; i++) {
 770                                 ena_buf++;
 771                                 dma_unmap_page(tx_ring->dev,
 772                                                dma_unmap_addr(ena_buf, paddr),
 773                                                dma_unmap_len(ena_buf, len),
 774                                                DMA_TO_DEVICE);
 775                         }
 776                 }
 777
 778                 netif_dbg(tx_ring->adapter, tx_done, tx_ring->netdev,
 779                           "tx_poll: q %d skb %p completed\n", tx_ring->qid,
 780                           skb);
 781
 782                 tx_bytes += skb->len;
 783                 dev_kfree_skb(skb);
 784                 tx_pkts++;
 785                 total_done += tx_info->tx_descs;
 786
 787                 tx_ring->free_tx_ids[next_to_clean] = req_id;
 788                 next_to_clean = ENA_TX_RING_IDX_NEXT(next_to_clean,
 789                                                      tx_ring->ring_size);
 790         }
 791
 792         tx_ring->next_to_clean = next_to_clean;
 793         ena_com_comp_ack(tx_ring->ena_com_io_sq, total_done);
 794         ena_com_update_dev_comp_head(tx_ring->ena_com_io_cq);
 795
 796         netdev_tx_completed_queue(txq, tx_pkts, tx_bytes);
 797
 798         netif_dbg(tx_ring->adapter, tx_done, tx_ring->netdev,
 799                   "tx_poll: q %d done. total pkts: %d\n",
 800                   tx_ring->qid, tx_pkts);
 801
 802         /* need to make the rings circular update visible to
 803          * ena_start_xmit() before checking for netif_queue_stopped().
 804          */
 805         smp_mb();
 806
 807         above_thresh = ena_com_sq_empty_space(tx_ring->ena_com_io_sq) >
 808                 ENA_TX_WAKEUP_THRESH;
 809         if (unlikely(netif_tx_queue_stopped(txq) && above_thresh)) {
 810                 __netif_tx_lock(txq, smp_processor_id());
 811                 above_thresh = ena_com_sq_empty_space(tx_ring->ena_com_io_sq) >
 812                         ENA_TX_WAKEUP_THRESH;
 813                 if (netif_tx_queue_stopped(txq) && above_thresh) {
 814                         netif_tx_wake_queue(txq);
 815                         u64_stats_update_begin(&tx_ring->syncp);
 816                         tx_ring->tx_stats.queue_wakeup++;
 817                         u64_stats_update_end(&tx_ring->syncp);
 818                 }
 819                 __netif_tx_unlock(txq);
 820         }
 821
 822         tx_ring->per_napi_bytes += tx_bytes;
 823         tx_ring->per_napi_packets += tx_pkts;
 824
 825         return tx_pkts;
 826 }
 827
 828 static struct sk_buff *ena_alloc_skb(struct ena_ring *rx_ring, bool frags)
 829 {
 830         struct sk_buff *skb;
 831
 832         if (frags)
 833                 skb = napi_get_frags(rx_ring->napi);
 834         else
 835                 skb = netdev_alloc_skb_ip_align(rx_ring->netdev,
 836                                                 rx_ring->rx_copybreak);
 837
 838         if (unlikely(!skb)) {
 839                 u64_stats_update_begin(&rx_ring->syncp);
 840                 rx_ring->rx_stats.skb_alloc_fail++;
 841                 u64_stats_update_end(&rx_ring->syncp);
 842                 netif_dbg(rx_ring->adapter, rx_err, rx_ring->netdev,
 843                           "Failed to allocate skb. frags: %d\n", frags);
 844                 return NULL;
 845         }
 846
 847         return skb;
 848 }
 849
 850 static struct sk_buff *ena_rx_skb(struct ena_ring *rx_ring,
 851                                   struct ena_com_rx_buf_info *ena_bufs,
 852                                   u32 descs,
 853                                   u16 *next_to_clean)
 854 {
 855         struct sk_buff *skb;
 856         struct ena_rx_buffer *rx_info;
 857         u16 len, req_id, buf = 0;
 858         void *va;
 859
 860         len = ena_bufs[buf].len;
 861         req_id = ena_bufs[buf].req_id;
 862         rx_info = &rx_ring->rx_buffer_info[req_id];
 863
 864         if (unlikely(!rx_info->page)) {
 865                 netif_err(rx_ring->adapter, rx_err, rx_ring->netdev,
 866                           "Page is NULL\n");
 867                 return NULL;
 868         }
 869
 870         netif_dbg(rx_ring->adapter, rx_status, rx_ring->netdev,
 871                   "rx_info %p page %p\n",
 872                   rx_info, rx_info->page);
 873
 874         /* save virt address of first buffer */
 875         va = page_address(rx_info->page) + rx_info->page_offset;
 876         prefetch(va + NET_IP_ALIGN);
 877
 878         if (len <= rx_ring->rx_copybreak) {
 879                 skb = ena_alloc_skb(rx_ring, false);
 880                 if (unlikely(!skb))
 881                         return NULL;
 882
 883                 netif_dbg(rx_ring->adapter, rx_status, rx_ring->netdev,
 884                           "rx allocated small packet. len %d. data_len %d\n",
 885                           skb->len, skb->data_len);
 886
 887                 /* sync this buffer for CPU use */
 888                 dma_sync_single_for_cpu(rx_ring->dev,
 889                                         dma_unmap_addr(&rx_info->ena_buf, paddr),
 890                                         len,
 891                                         DMA_FROM_DEVICE);
 892                 skb_copy_to_linear_data(skb, va, len);
 893                 dma_sync_single_for_device(rx_ring->dev,
 894                                            dma_unmap_addr(&rx_info->ena_buf, paddr),
 895                                            len,
 896                                            DMA_FROM_DEVICE);
 897
 898                 skb_put(skb, len);
 899                 skb->protocol = eth_type_trans(skb, rx_ring->netdev);
 900                 rx_ring->free_rx_ids[*next_to_clean] = req_id;
 901                 *next_to_clean = ENA_RX_RING_IDX_ADD(*next_to_clean, descs,
 902                                                      rx_ring->ring_size);
 903                 return skb;
 904         }
 905
 906         skb = ena_alloc_skb(rx_ring, true);
 907         if (unlikely(!skb))
 908                 return NULL;
 909
 910         do {
 911                 dma_unmap_page(rx_ring->dev,
 912                                dma_unmap_addr(&rx_info->ena_buf, paddr),
 913                                PAGE_SIZE, DMA_FROM_DEVICE);
 914
 915                 skb_add_rx_frag(skb, skb_shinfo(skb)->nr_frags, rx_info->page,
 916                                 rx_info->page_offset, len, PAGE_SIZE);
 917
 918                 netif_dbg(rx_ring->adapter, rx_status, rx_ring->netdev,
 919                           "rx skb updated. len %d. data_len %d\n",
 920                           skb->len, skb->data_len);
 921
 922                 rx_info->page = NULL;
 923
 924                 rx_ring->free_rx_ids[*next_to_clean] = req_id;
 925                 *next_to_clean =
 926                         ENA_RX_RING_IDX_NEXT(*next_to_clean,
 927                                              rx_ring->ring_size);
 928                 if (likely(--descs == 0))
 929                         break;
 930
 931                 buf++;
 932                 len = ena_bufs[buf].len;
 933                 req_id = ena_bufs[buf].req_id;
 934                 rx_info = &rx_ring->rx_buffer_info[req_id];
 935         } while (1);
 936
 937         return skb;
 938 }
 939
 940 /* ena_rx_checksum - indicate in skb if hw indicated a good cksum
 941  * @adapter: structure containing adapter specific data
 942  * @ena_rx_ctx: received packet context/metadata
 943  * @skb: skb currently being received and modified
 944  */
 945 static inline void ena_rx_checksum(struct ena_ring *rx_ring,
 946                                    struct ena_com_rx_ctx *ena_rx_ctx,
 947                                    struct sk_buff *skb)
 948 {
 949         /* Rx csum disabled */
 950         if (unlikely(!(rx_ring->netdev->features & NETIF_F_RXCSUM))) {
 951                 skb->ip_summed = CHECKSUM_NONE;
 952                 return;
 953         }
 954
 955         /* For fragmented packets the checksum isn't valid */
 956         if (ena_rx_ctx->frag) {
 957                 skb->ip_summed = CHECKSUM_NONE;
 958                 return;
 959         }
 960
 961         /* if IP and error */
 962         if (unlikely((ena_rx_ctx->l3_proto == ENA_ETH_IO_L3_PROTO_IPV4) &&
 963                      (ena_rx_ctx->l3_csum_err))) {
 964                 /* ipv4 checksum error */
 965                 skb->ip_summed = CHECKSUM_NONE;
 966                 u64_stats_update_begin(&rx_ring->syncp);
 967                 rx_ring->rx_stats.bad_csum++;
 968                 u64_stats_update_end(&rx_ring->syncp);
 969                 netif_err(rx_ring->adapter, rx_err, rx_ring->netdev,
 970                           "RX IPv4 header checksum error\n");
 971                 return;
 972         }
 973
 974         /* if TCP/UDP */
 975         if (likely((ena_rx_ctx->l4_proto == ENA_ETH_IO_L4_PROTO_TCP) ||
 976                    (ena_rx_ctx->l4_proto == ENA_ETH_IO_L4_PROTO_UDP))) {
 977                 if (unlikely(ena_rx_ctx->l4_csum_err)) {
 978                         /* TCP/UDP checksum error */
 979                         u64_stats_update_begin(&rx_ring->syncp);
 980                         rx_ring->rx_stats.bad_csum++;
 981                         u64_stats_update_end(&rx_ring->syncp);
 982                         netif_err(rx_ring->adapter, rx_err, rx_ring->netdev,
 983                                   "RX L4 checksum error\n");
 984                         skb->ip_summed = CHECKSUM_NONE;
 985                         return;
 986                 }
 987
 988                 skb->ip_summed = CHECKSUM_UNNECESSARY;
 989         }
 990 }
 991
 992 static void ena_set_rx_hash(struct ena_ring *rx_ring,
 993                             struct ena_com_rx_ctx *ena_rx_ctx,
 994                             struct sk_buff *skb)
 995 {
 996         enum pkt_hash_types hash_type;
 997
 998         if (likely(rx_ring->netdev->features & NETIF_F_RXHASH)) {
 999                 if (likely((ena_rx_ctx->l4_proto == ENA_ETH_IO_L4_PROTO_TCP) ||
1000                            (ena_rx_ctx->l4_proto == ENA_ETH_IO_L4_PROTO_UDP)))
1001
1002                         hash_type = PKT_HASH_TYPE_L4;
1003                 else
1004                         hash_type = PKT_HASH_TYPE_NONE;
1005
1006                 /* Override hash type if the packet is fragmented */
1007                 if (ena_rx_ctx->frag)
1008                         hash_type = PKT_HASH_TYPE_NONE;
1009
1010                 skb_set_hash(skb, ena_rx_ctx->hash, hash_type);
1011         }
1012 }
1013
1014 /* ena_clean_rx_irq - Cleanup RX irq
1015  * @rx_ring: RX ring to clean
1016  * @napi: napi handler
1017  * @budget: how many packets driver is allowed to clean
1018  *
1019  * Returns the number of cleaned buffers.
1020  */
1021 static int ena_clean_rx_irq(struct ena_ring *rx_ring, struct napi_struct *napi,
1022                             u32 budget)
1023 {
1024         u16 next_to_clean = rx_ring->next_to_clean;
1025         u32 res_budget, work_done;
1026
1027         struct ena_com_rx_ctx ena_rx_ctx;
1028         struct ena_adapter *adapter;
1029         struct sk_buff *skb;
1030         int refill_required;
1031         int refill_threshold;
1032         int rc = 0;
1033         int total_len = 0;
1034         int rx_copybreak_pkt = 0;
1035         int i;
1036
1037         netif_dbg(rx_ring->adapter, rx_status, rx_ring->netdev,
1038                   "%s qid %d\n", __func__, rx_ring->qid);
1039         res_budget = budget;
1040
1041         do {
1042                 ena_rx_ctx.ena_bufs = rx_ring->ena_bufs;
1043                 ena_rx_ctx.max_bufs = rx_ring->sgl_size;
1044                 ena_rx_ctx.descs = 0;
1045                 rc = ena_com_rx_pkt(rx_ring->ena_com_io_cq,
1046                                     rx_ring->ena_com_io_sq,
1047                                     &ena_rx_ctx);
1048                 if (unlikely(rc))
1049                         goto error;
1050
1051                 if (unlikely(ena_rx_ctx.descs == 0))
1052                         break;
1053
1054                 netif_dbg(rx_ring->adapter, rx_status, rx_ring->netdev,
1055                           "rx_poll: q %d got packet from ena. descs #: %d l3 proto %d l4 proto %d hash: %x\n",
1056                           rx_ring->qid, ena_rx_ctx.descs, ena_rx_ctx.l3_proto,
1057                           ena_rx_ctx.l4_proto, ena_rx_ctx.hash);
1058
1059                 /* allocate skb and fill it */
1060                 skb = ena_rx_skb(rx_ring, rx_ring->ena_bufs, ena_rx_ctx.descs,
1061                                  &next_to_clean);
1062
1063                 /* exit if we failed to retrieve a buffer */
1064                 if (unlikely(!skb)) {
1065                         for (i = 0; i < ena_rx_ctx.descs; i++) {
1066                                 rx_ring->free_tx_ids[next_to_clean] =
1067                                         rx_ring->ena_bufs[i].req_id;
1068                                 next_to_clean =
1069                                         ENA_RX_RING_IDX_NEXT(next_to_clean,
1070                                                              rx_ring->ring_size);
1071                         }
1072                         break;
1073                 }
1074
1075                 ena_rx_checksum(rx_ring, &ena_rx_ctx, skb);
1076
1077                 ena_set_rx_hash(rx_ring, &ena_rx_ctx, skb);
1078
1079                 skb_record_rx_queue(skb, rx_ring->qid);
1080
1081                 if (rx_ring->ena_bufs[0].len <= rx_ring->rx_copybreak) {
1082                         total_len += rx_ring->ena_bufs[0].len;
1083                         rx_copybreak_pkt++;
1084                         napi_gro_receive(napi, skb);
1085                 } else {
1086                         total_len += skb->len;
1087                         napi_gro_frags(napi);
1088                 }
1089
1090                 res_budget--;
1091         } while (likely(res_budget));
1092
1093         work_done = budget - res_budget;
1094         rx_ring->per_napi_bytes += total_len;
1095         rx_ring->per_napi_packets += work_done;
1096         u64_stats_update_begin(&rx_ring->syncp);
1097         rx_ring->rx_stats.bytes += total_len;
1098         rx_ring->rx_stats.cnt += work_done;
1099         rx_ring->rx_stats.rx_copybreak_pkt += rx_copybreak_pkt;
1100         u64_stats_update_end(&rx_ring->syncp);
1101
1102         rx_ring->next_to_clean = next_to_clean;
1103
1104         refill_required = ena_com_sq_empty_space(rx_ring->ena_com_io_sq);
1105         refill_threshold = rx_ring->ring_size / ENA_RX_REFILL_THRESH_DIVIDER;
1106
1107         /* Optimization, try to batch new rx buffers */
1108         if (refill_required > refill_threshold) {
1109                 ena_com_update_dev_comp_head(rx_ring->ena_com_io_cq);
1110                 ena_refill_rx_bufs(rx_ring, refill_required);
1111         }
1112
1113         return work_done;
1114
1115 error:
1116         adapter = netdev_priv(rx_ring->netdev);
1117
1118         u64_stats_update_begin(&rx_ring->syncp);
1119         rx_ring->rx_stats.bad_desc_num++;
1120         u64_stats_update_end(&rx_ring->syncp);
1121
1122         /* Too many desc from the device. Trigger reset */
1123         adapter->reset_reason = ENA_REGS_RESET_TOO_MANY_RX_DESCS;
1124         set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
1125
1126         return 0;
1127 }
1128
1129 inline void ena_adjust_intr_moderation(struct ena_ring *rx_ring,
1130                                        struct ena_ring *tx_ring)
1131 {
1132         /* We apply adaptive moderation on Rx path only.
1133          * Tx uses static interrupt moderation.
1134          */
1135         ena_com_calculate_interrupt_delay(rx_ring->ena_dev,
1136                                           rx_ring->per_napi_packets,
1137                                           rx_ring->per_napi_bytes,
1138                                           &rx_ring->smoothed_interval,
1139                                           &rx_ring->moder_tbl_idx);
1140
1141         /* Reset per napi packets/bytes */
1142         tx_ring->per_napi_packets = 0;
1143         tx_ring->per_napi_bytes = 0;
1144         rx_ring->per_napi_packets = 0;
1145         rx_ring->per_napi_bytes = 0;
1146 }
1147
1148 static inline void ena_unmask_interrupt(struct ena_ring *tx_ring,
1149                                         struct ena_ring *rx_ring)
1150 {
1151         struct ena_eth_io_intr_reg intr_reg;
1152
1153         /* Update intr register: rx intr delay,
1154          * tx intr delay and interrupt unmask
1155          */
1156         ena_com_update_intr_reg(&intr_reg,
1157                                 rx_ring->smoothed_interval,
1158                                 tx_ring->smoothed_interval,
1159                                 true);
1160
1161         /* It is a shared MSI-X.
1162          * Tx and Rx CQ have pointer to it.
1163          * So we use one of them to reach the intr reg
1164          */
1165         ena_com_unmask_intr(rx_ring->ena_com_io_cq, &intr_reg);
1166 }
1167
1168 static inline void ena_update_ring_numa_node(struct ena_ring *tx_ring,
1169                                              struct ena_ring *rx_ring)
1170 {
1171         int cpu = get_cpu();
1172         int numa_node;
1173
1174         /* Check only one ring since the 2 rings are running on the same cpu */
1175         if (likely(tx_ring->cpu == cpu))
1176                 goto out;
1177
1178         numa_node = cpu_to_node(cpu);
1179         put_cpu();
1180
1181         if (numa_node != NUMA_NO_NODE) {
1182                 ena_com_update_numa_node(tx_ring->ena_com_io_cq, numa_node);
1183                 ena_com_update_numa_node(rx_ring->ena_com_io_cq, numa_node);
1184         }
1185
1186         tx_ring->cpu = cpu;
1187         rx_ring->cpu = cpu;
1188
1189         return;
1190 out:
1191         put_cpu();
1192 }
1193
1194 static int ena_io_poll(struct napi_struct *napi, int budget)
1195 {
1196         struct ena_napi *ena_napi = container_of(napi, struct ena_napi, napi);
1197         struct ena_ring *tx_ring, *rx_ring;
1198
1199         u32 tx_work_done;
1200         u32 rx_work_done;
1201         int tx_budget;
1202         int napi_comp_call = 0;
1203         int ret;
1204
1205         tx_ring = ena_napi->tx_ring;
1206         rx_ring = ena_napi->rx_ring;
1207
1208         tx_budget = tx_ring->ring_size / ENA_TX_POLL_BUDGET_DIVIDER;
1209
1210         if (!test_bit(ENA_FLAG_DEV_UP, &tx_ring->adapter->flags) ||
1211             test_bit(ENA_FLAG_TRIGGER_RESET, &tx_ring->adapter->flags)) {
1212                 napi_complete_done(napi, 0);
1213                 return 0;
1214         }
1215
1216         tx_work_done = ena_clean_tx_irq(tx_ring, tx_budget);
1217         rx_work_done = ena_clean_rx_irq(rx_ring, napi, budget);
1218
1219         /* If the device is about to reset or down, avoid unmask
1220          * the interrupt and return 0 so NAPI won't reschedule
1221          */
1222         if (unlikely(!test_bit(ENA_FLAG_DEV_UP, &tx_ring->adapter->flags) ||
1223                      test_bit(ENA_FLAG_TRIGGER_RESET, &tx_ring->adapter->flags))) {
1224                 napi_complete_done(napi, 0);
1225                 ret = 0;
1226
1227         } else if ((budget > rx_work_done) && (tx_budget > tx_work_done)) {
1228                 napi_comp_call = 1;
1229
1230                 /* Update numa and unmask the interrupt only when schedule
1231                  * from the interrupt context (vs from sk_busy_loop)
1232                  */
1233                 if (napi_complete_done(napi, rx_work_done)) {
1234                         /* Tx and Rx share the same interrupt vector */
1235                         if (ena_com_get_adaptive_moderation_enabled(rx_ring->ena_dev))
1236                                 ena_adjust_intr_moderation(rx_ring, tx_ring);
1237
1238                         ena_unmask_interrupt(tx_ring, rx_ring);
1239                 }
1240
1241                 ena_update_ring_numa_node(tx_ring, rx_ring);
1242
1243                 ret = rx_work_done;
1244         } else {
1245                 ret = budget;
1246         }
1247
1248         u64_stats_update_begin(&tx_ring->syncp);
1249         tx_ring->tx_stats.napi_comp += napi_comp_call;
1250         tx_ring->tx_stats.tx_poll++;
1251         u64_stats_update_end(&tx_ring->syncp);
1252
1253         return ret;
1254 }
1255
1256 static irqreturn_t ena_intr_msix_mgmnt(int irq, void *data)
1257 {
1258         struct ena_adapter *adapter = (struct ena_adapter *)data;
1259
1260         ena_com_admin_q_comp_intr_handler(adapter->ena_dev);
1261
1262         /* Don't call the aenq handler before probe is done */
1263         if (likely(test_bit(ENA_FLAG_DEVICE_RUNNING, &adapter->flags)))
1264                 ena_com_aenq_intr_handler(adapter->ena_dev, data);
1265
1266         return IRQ_HANDLED;
1267 }
1268
1269 /* ena_intr_msix_io - MSI-X Interrupt Handler for Tx/Rx
1270  * @irq: interrupt number
1271  * @data: pointer to a network interface private napi device structure
1272  */
1273 static irqreturn_t ena_intr_msix_io(int irq, void *data)
1274 {
1275         struct ena_napi *ena_napi = data;
1276
1277         napi_schedule_irqoff(&ena_napi->napi);
1278
1279         return IRQ_HANDLED;
1280 }
1281
1282 /* Reserve a single MSI-X vector for management (admin + aenq).
1283  * plus reserve one vector for each potential io queue.
1284  * the number of potential io queues is the minimum of what the device
1285  * supports and the number of vCPUs.
1286  */
1287 static int ena_enable_msix(struct ena_adapter *adapter, int num_queues)
1288 {
1289         int msix_vecs, irq_cnt;
1290
1291         if (test_bit(ENA_FLAG_MSIX_ENABLED, &adapter->flags)) {
1292                 netif_err(adapter, probe, adapter->netdev,
1293                           "Error, MSI-X is already enabled\n");
1294                 return -EPERM;
1295         }
1296
1297         /* Reserved the max msix vectors we might need */
1298         msix_vecs = ENA_MAX_MSIX_VEC(num_queues);
1299
1300         netif_dbg(adapter, probe, adapter->netdev,
1301                   "trying to enable MSI-X, vectors %d\n", msix_vecs);
1302
1303         irq_cnt = pci_alloc_irq_vectors(adapter->pdev, ENA_MIN_MSIX_VEC,
1304                                         msix_vecs, PCI_IRQ_MSIX);
1305
1306         if (irq_cnt < 0) {
1307                 netif_err(adapter, probe, adapter->netdev,
1308                           "Failed to enable MSI-X. irq_cnt %d\n", irq_cnt);
1309                 return -ENOSPC;
1310         }
1311
1312         if (irq_cnt != msix_vecs) {
1313                 netif_notice(adapter, probe, adapter->netdev,
1314                              "enable only %d MSI-X (out of %d), reduce the number of queues\n",
1315                              irq_cnt, msix_vecs);
1316                 adapter->num_queues = irq_cnt - ENA_ADMIN_MSIX_VEC;
1317         }
1318
1319         if (ena_init_rx_cpu_rmap(adapter))
1320                 netif_warn(adapter, probe, adapter->netdev,
1321                            "Failed to map IRQs to CPUs\n");
1322
1323         adapter->msix_vecs = irq_cnt;
1324         set_bit(ENA_FLAG_MSIX_ENABLED, &adapter->flags);
1325
1326         return 0;
1327 }
1328
1329 static void ena_setup_mgmnt_intr(struct ena_adapter *adapter)
1330 {
1331         u32 cpu;
1332
1333         snprintf(adapter->irq_tbl[ENA_MGMNT_IRQ_IDX].name,
1334                  ENA_IRQNAME_SIZE, "ena-mgmnt@pci:%s",
1335                  pci_name(adapter->pdev));
1336         adapter->irq_tbl[ENA_MGMNT_IRQ_IDX].handler =
1337                 ena_intr_msix_mgmnt;
1338         adapter->irq_tbl[ENA_MGMNT_IRQ_IDX].data = adapter;
1339         adapter->irq_tbl[ENA_MGMNT_IRQ_IDX].vector =
1340                 pci_irq_vector(adapter->pdev, ENA_MGMNT_IRQ_IDX);
1341         cpu = cpumask_first(cpu_online_mask);
1342         adapter->irq_tbl[ENA_MGMNT_IRQ_IDX].cpu = cpu;
1343         cpumask_set_cpu(cpu,
1344                         &adapter->irq_tbl[ENA_MGMNT_IRQ_IDX].affinity_hint_mask);
1345 }
1346
1347 static void ena_setup_io_intr(struct ena_adapter *adapter)
1348 {
1349         struct net_device *netdev;
1350         int irq_idx, i, cpu;
1351
1352         netdev = adapter->netdev;
1353
1354         for (i = 0; i < adapter->num_queues; i++) {
1355                 irq_idx = ENA_IO_IRQ_IDX(i);
1356                 cpu = i % num_online_cpus();
1357
1358                 snprintf(adapter->irq_tbl[irq_idx].name, ENA_IRQNAME_SIZE,
1359                          "%s-Tx-Rx-%d", netdev->name, i);
1360                 adapter->irq_tbl[irq_idx].handler = ena_intr_msix_io;
1361                 adapter->irq_tbl[irq_idx].data = &adapter->ena_napi[i];
1362                 adapter->irq_tbl[irq_idx].vector =
1363                         pci_irq_vector(adapter->pdev, irq_idx);
1364                 adapter->irq_tbl[irq_idx].cpu = cpu;
1365
1366                 cpumask_set_cpu(cpu,
1367                                 &adapter->irq_tbl[irq_idx].affinity_hint_mask);
1368         }
1369 }
1370
1371 static int ena_request_mgmnt_irq(struct ena_adapter *adapter)
1372 {
1373         unsigned long flags = 0;
1374         struct ena_irq *irq;
1375         int rc;
1376
1377         irq = &adapter->irq_tbl[ENA_MGMNT_IRQ_IDX];
1378         rc = request_irq(irq->vector, irq->handler, flags, irq->name,
1379                          irq->data);
1380         if (rc) {
1381                 netif_err(adapter, probe, adapter->netdev,
1382                           "failed to request admin irq\n");
1383                 return rc;
1384         }
1385
1386         netif_dbg(adapter, probe, adapter->netdev,
1387                   "set affinity hint of mgmnt irq.to 0x%lx (irq vector: %d)\n",
1388                   irq->affinity_hint_mask.bits[0], irq->vector);
1389
1390         irq_set_affinity_hint(irq->vector, &irq->affinity_hint_mask);
1391
1392         return rc;
1393 }
1394
1395 static int ena_request_io_irq(struct ena_adapter *adapter)
1396 {
1397         unsigned long flags = 0;
1398         struct ena_irq *irq;
1399         int rc = 0, i, k;
1400
1401         if (!test_bit(ENA_FLAG_MSIX_ENABLED, &adapter->flags)) {
1402                 netif_err(adapter, ifup, adapter->netdev,
1403                           "Failed to request I/O IRQ: MSI-X is not enabled\n");
1404                 return -EINVAL;
1405         }
1406
1407         for (i = ENA_IO_IRQ_FIRST_IDX; i < adapter->msix_vecs; i++) {
1408                 irq = &adapter->irq_tbl[i];
1409                 rc = request_irq(irq->vector, irq->handler, flags, irq->name,
1410                                  irq->data);
1411                 if (rc) {
1412                         netif_err(adapter, ifup, adapter->netdev,
1413                                   "Failed to request I/O IRQ. index %d rc %d\n",
1414                                    i, rc);
1415                         goto err;
1416                 }
1417
1418                 netif_dbg(adapter, ifup, adapter->netdev,
1419                           "set affinity hint of irq. index %d to 0x%lx (irq vector: %d)\n",
1420                           i, irq->affinity_hint_mask.bits[0], irq->vector);
1421
1422                 irq_set_affinity_hint(irq->vector, &irq->affinity_hint_mask);
1423         }
1424
1425         return rc;
1426
1427 err:
1428         for (k = ENA_IO_IRQ_FIRST_IDX; k < i; k++) {
1429                 irq = &adapter->irq_tbl[k];
1430                 free_irq(irq->vector, irq->data);
1431         }
1432
1433         return rc;
1434 }
1435
1436 static void ena_free_mgmnt_irq(struct ena_adapter *adapter)
1437 {
1438         struct ena_irq *irq;
1439
1440         irq = &adapter->irq_tbl[ENA_MGMNT_IRQ_IDX];
1441         synchronize_irq(irq->vector);
1442         irq_set_affinity_hint(irq->vector, NULL);
1443         free_irq(irq->vector, irq->data);
1444 }
1445
1446 static void ena_free_io_irq(struct ena_adapter *adapter)
1447 {
1448         struct ena_irq *irq;
1449         int i;
1450
1451 #ifdef CONFIG_RFS_ACCEL
1452         if (adapter->msix_vecs >= 1) {
1453                 free_irq_cpu_rmap(adapter->netdev->rx_cpu_rmap);
1454                 adapter->netdev->rx_cpu_rmap = NULL;
1455         }
1456 #endif /* CONFIG_RFS_ACCEL */
1457
1458         for (i = ENA_IO_IRQ_FIRST_IDX; i < adapter->msix_vecs; i++) {
1459                 irq = &adapter->irq_tbl[i];
1460                 irq_set_affinity_hint(irq->vector, NULL);
1461                 free_irq(irq->vector, irq->data);
1462         }
1463 }
1464
1465 static void ena_disable_msix(struct ena_adapter *adapter)
1466 {
1467         if (test_and_clear_bit(ENA_FLAG_MSIX_ENABLED, &adapter->flags))
1468                 pci_free_irq_vectors(adapter->pdev);
1469 }
1470
1471 static void ena_disable_io_intr_sync(struct ena_adapter *adapter)
1472 {
1473         int i;
1474
1475         if (!netif_running(adapter->netdev))
1476                 return;
1477
1478         for (i = ENA_IO_IRQ_FIRST_IDX; i < adapter->msix_vecs; i++)
1479                 synchronize_irq(adapter->irq_tbl[i].vector);
1480 }
1481
1482 static void ena_del_napi(struct ena_adapter *adapter)
1483 {
1484         int i;
1485
1486         for (i = 0; i < adapter->num_queues; i++)
1487                 netif_napi_del(&adapter->ena_napi[i].napi);
1488 }
1489
1490 static void ena_init_napi(struct ena_adapter *adapter)
1491 {
1492         struct ena_napi *napi;
1493         int i;
1494
1495         for (i = 0; i < adapter->num_queues; i++) {
1496                 napi = &adapter->ena_napi[i];
1497
1498                 netif_napi_add(adapter->netdev,
1499                                &adapter->ena_napi[i].napi,
1500                                ena_io_poll,
1501                                ENA_NAPI_BUDGET);
1502                 napi->rx_ring = &adapter->rx_ring[i];
1503                 napi->tx_ring = &adapter->tx_ring[i];
1504                 napi->qid = i;
1505         }
1506 }
1507
1508 static void ena_napi_disable_all(struct ena_adapter *adapter)
1509 {
1510         int i;
1511
1512         for (i = 0; i < adapter->num_queues; i++)
1513                 napi_disable(&adapter->ena_napi[i].napi);
1514 }
1515
1516 static void ena_napi_enable_all(struct ena_adapter *adapter)
1517 {
1518         int i;
1519
1520         for (i = 0; i < adapter->num_queues; i++)
1521                 napi_enable(&adapter->ena_napi[i].napi);
1522 }
1523
1524 static void ena_restore_ethtool_params(struct ena_adapter *adapter)
1525 {
1526         adapter->tx_usecs = 0;
1527         adapter->rx_usecs = 0;
1528         adapter->tx_frames = 1;
1529         adapter->rx_frames = 1;
1530 }
1531
1532 /* Configure the Rx forwarding */
1533 static int ena_rss_configure(struct ena_adapter *adapter)
1534 {
1535         struct ena_com_dev *ena_dev = adapter->ena_dev;
1536         int rc;
1537
1538         /* In case the RSS table wasn't initialized by probe */
1539         if (!ena_dev->rss.tbl_log_size) {
1540                 rc = ena_rss_init_default(adapter);
1541                 if (rc && (rc != -EOPNOTSUPP)) {
1542                         netif_err(adapter, ifup, adapter->netdev,
1543                                   "Failed to init RSS rc: %d\n", rc);
1544                         return rc;
1545                 }
1546         }
1547
1548         /* Set indirect table */
1549         rc = ena_com_indirect_table_set(ena_dev);
1550         if (unlikely(rc && rc != -EOPNOTSUPP))
1551                 return rc;
1552
1553         /* Configure hash function (if supported) */
1554         rc = ena_com_set_hash_function(ena_dev);
1555         if (unlikely(rc && (rc != -EOPNOTSUPP)))
1556                 return rc;
1557
1558         /* Configure hash inputs (if supported) */
1559         rc = ena_com_set_hash_ctrl(ena_dev);
1560         if (unlikely(rc && (rc != -EOPNOTSUPP)))
1561                 return rc;
1562
1563         return 0;
1564 }
1565
1566 static int ena_up_complete(struct ena_adapter *adapter)
1567 {
1568         int rc, i;
1569
1570         rc = ena_rss_configure(adapter);
1571         if (rc)
1572                 return rc;
1573
1574         ena_init_napi(adapter);
1575
1576         ena_change_mtu(adapter->netdev, adapter->netdev->mtu);
1577
1578         ena_refill_all_rx_bufs(adapter);
1579
1580         /* enable transmits */
1581         netif_tx_start_all_queues(adapter->netdev);
1582
1583         ena_restore_ethtool_params(adapter);
1584
1585         ena_napi_enable_all(adapter);
1586
1587         /* Enable completion queues interrupt */
1588         for (i = 0; i < adapter->num_queues; i++)
1589                 ena_unmask_interrupt(&adapter->tx_ring[i],
1590                                      &adapter->rx_ring[i]);
1591
1592         /* schedule napi in case we had pending packets
1593          * from the last time we disable napi
1594          */
1595         for (i = 0; i < adapter->num_queues; i++)
1596                 napi_schedule(&adapter->ena_napi[i].napi);
1597
1598         return 0;
1599 }
1600
1601 static int ena_create_io_tx_queue(struct ena_adapter *adapter, int qid)
1602 {
1603         struct ena_com_create_io_ctx ctx = { 0 };
1604         struct ena_com_dev *ena_dev;
1605         struct ena_ring *tx_ring;
1606         u32 msix_vector;
1607         u16 ena_qid;
1608         int rc;
1609
1610         ena_dev = adapter->ena_dev;
1611
1612         tx_ring = &adapter->tx_ring[qid];
1613         msix_vector = ENA_IO_IRQ_IDX(qid);
1614         ena_qid = ENA_IO_TXQ_IDX(qid);
1615
1616         ctx.direction = ENA_COM_IO_QUEUE_DIRECTION_TX;
1617         ctx.qid = ena_qid;
1618         ctx.mem_queue_type = ena_dev->tx_mem_queue_type;
1619         ctx.msix_vector = msix_vector;
1620         ctx.queue_size = adapter->tx_ring_size;
1621         ctx.numa_node = cpu_to_node(tx_ring->cpu);
1622
1623         rc = ena_com_create_io_queue(ena_dev, &ctx);
1624         if (rc) {
1625                 netif_err(adapter, ifup, adapter->netdev,
1626                           "Failed to create I/O TX queue num %d rc: %d\n",
1627                           qid, rc);
1628                 return rc;
1629         }
1630
1631         rc = ena_com_get_io_handlers(ena_dev, ena_qid,
1632                                      &tx_ring->ena_com_io_sq,
1633                                      &tx_ring->ena_com_io_cq);
1634         if (rc) {
1635                 netif_err(adapter, ifup, adapter->netdev,
1636                           "Failed to get TX queue handlers. TX queue num %d rc: %d\n",
1637                           qid, rc);
1638                 ena_com_destroy_io_queue(ena_dev, ena_qid);
1639                 return rc;
1640         }
1641
1642         ena_com_update_numa_node(tx_ring->ena_com_io_cq, ctx.numa_node);
1643         return rc;
1644 }
1645
1646 static int ena_create_all_io_tx_queues(struct ena_adapter *adapter)
1647 {
1648         struct ena_com_dev *ena_dev = adapter->ena_dev;
1649         int rc, i;
1650
1651         for (i = 0; i < adapter->num_queues; i++) {
1652                 rc = ena_create_io_tx_queue(adapter, i);
1653                 if (rc)
1654                         goto create_err;
1655         }
1656
1657         return 0;
1658
1659 create_err:
1660         while (i--)
1661                 ena_com_destroy_io_queue(ena_dev, ENA_IO_TXQ_IDX(i));
1662
1663         return rc;
1664 }
1665
1666 static int ena_create_io_rx_queue(struct ena_adapter *adapter, int qid)
1667 {
1668         struct ena_com_dev *ena_dev;
1669         struct ena_com_create_io_ctx ctx = { 0 };
1670         struct ena_ring *rx_ring;
1671         u32 msix_vector;
1672         u16 ena_qid;
1673         int rc;
1674
1675         ena_dev = adapter->ena_dev;
1676
1677         rx_ring = &adapter->rx_ring[qid];
1678         msix_vector = ENA_IO_IRQ_IDX(qid);
1679         ena_qid = ENA_IO_RXQ_IDX(qid);
1680
1681         ctx.qid = ena_qid;
1682         ctx.direction = ENA_COM_IO_QUEUE_DIRECTION_RX;
1683         ctx.mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST;
1684         ctx.msix_vector = msix_vector;
1685         ctx.queue_size = adapter->rx_ring_size;
1686         ctx.numa_node = cpu_to_node(rx_ring->cpu);
1687
1688         rc = ena_com_create_io_queue(ena_dev, &ctx);
1689         if (rc) {
1690                 netif_err(adapter, ifup, adapter->netdev,
1691                           "Failed to create I/O RX queue num %d rc: %d\n",
1692                           qid, rc);
1693                 return rc;
1694         }
1695
1696         rc = ena_com_get_io_handlers(ena_dev, ena_qid,
1697                                      &rx_ring->ena_com_io_sq,
1698                                      &rx_ring->ena_com_io_cq);
1699         if (rc) {
1700                 netif_err(adapter, ifup, adapter->netdev,
1701                           "Failed to get RX queue handlers. RX queue num %d rc: %d\n",
1702                           qid, rc);
1703                 ena_com_destroy_io_queue(ena_dev, ena_qid);
1704                 return rc;
1705         }
1706
1707         ena_com_update_numa_node(rx_ring->ena_com_io_cq, ctx.numa_node);
1708
1709         return rc;
1710 }
1711
1712 static int ena_create_all_io_rx_queues(struct ena_adapter *adapter)
1713 {
1714         struct ena_com_dev *ena_dev = adapter->ena_dev;
1715         int rc, i;
1716
1717         for (i = 0; i < adapter->num_queues; i++) {
1718                 rc = ena_create_io_rx_queue(adapter, i);
1719                 if (rc)
1720                         goto create_err;
1721         }
1722
1723         return 0;
1724
1725 create_err:
1726         while (i--)
1727                 ena_com_destroy_io_queue(ena_dev, ENA_IO_RXQ_IDX(i));
1728
1729         return rc;
1730 }
1731
1732 static int ena_up(struct ena_adapter *adapter)
1733 {
1734         int rc;
1735
1736         netdev_dbg(adapter->netdev, "%s\n", __func__);
1737
1738         ena_setup_io_intr(adapter);
1739
1740         rc = ena_request_io_irq(adapter);
1741         if (rc)
1742                 goto err_req_irq;
1743
1744         /* allocate transmit descriptors */
1745         rc = ena_setup_all_tx_resources(adapter);
1746         if (rc)
1747                 goto err_setup_tx;
1748
1749         /* allocate receive descriptors */
1750         rc = ena_setup_all_rx_resources(adapter);
1751         if (rc)
1752                 goto err_setup_rx;
1753
1754         /* Create TX queues */
1755         rc = ena_create_all_io_tx_queues(adapter);
1756         if (rc)
1757                 goto err_create_tx_queues;
1758
1759         /* Create RX queues */
1760         rc = ena_create_all_io_rx_queues(adapter);
1761         if (rc)
1762                 goto err_create_rx_queues;
1763
1764         rc = ena_up_complete(adapter);
1765         if (rc)
1766                 goto err_up;
1767
1768         if (test_bit(ENA_FLAG_LINK_UP, &adapter->flags))
1769                 netif_carrier_on(adapter->netdev);
1770
1771         u64_stats_update_begin(&adapter->syncp);
1772         adapter->dev_stats.interface_up++;
1773         u64_stats_update_end(&adapter->syncp);
1774
1775         set_bit(ENA_FLAG_DEV_UP, &adapter->flags);
1776
1777         return rc;
1778
1779 err_up:
1780         ena_destroy_all_rx_queues(adapter);
1781 err_create_rx_queues:
1782         ena_destroy_all_tx_queues(adapter);
1783 err_create_tx_queues:
1784         ena_free_all_io_rx_resources(adapter);
1785 err_setup_rx:
1786         ena_free_all_io_tx_resources(adapter);
1787 err_setup_tx:
1788         ena_free_io_irq(adapter);
1789 err_req_irq:
1790
1791         return rc;
1792 }
1793
1794 static void ena_down(struct ena_adapter *adapter)
1795 {
1796         netif_info(adapter, ifdown, adapter->netdev, "%s\n", __func__);
1797
1798         clear_bit(ENA_FLAG_DEV_UP, &adapter->flags);
1799
1800         u64_stats_update_begin(&adapter->syncp);
1801         adapter->dev_stats.interface_down++;
1802         u64_stats_update_end(&adapter->syncp);
1803
1804         netif_carrier_off(adapter->netdev);
1805         netif_tx_disable(adapter->netdev);
1806
1807         /* After this point the napi handler won't enable the tx queue */
1808         ena_napi_disable_all(adapter);
1809
1810         /* After destroy the queue there won't be any new interrupts */
1811
1812         if (test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags)) {
1813                 int rc;
1814
1815                 rc = ena_com_dev_reset(adapter->ena_dev, adapter->reset_reason);
1816                 if (rc)
1817                         dev_err(&adapter->pdev->dev, "Device reset failed\n");
1818         }
1819
1820         ena_destroy_all_io_queues(adapter);
1821
1822         ena_disable_io_intr_sync(adapter);
1823         ena_free_io_irq(adapter);
1824         ena_del_napi(adapter);
1825
1826         ena_free_all_tx_bufs(adapter);
1827         ena_free_all_rx_bufs(adapter);
1828         ena_free_all_io_tx_resources(adapter);
1829         ena_free_all_io_rx_resources(adapter);
1830 }
1831
1832 /* ena_open - Called when a network interface is made active
1833  * @netdev: network interface device structure
1834  *
1835  * Returns 0 on success, negative value on failure
1836  *
1837  * The open entry point is called when a network interface is made
1838  * active by the system (IFF_UP).  At this point all resources needed
1839  * for transmit and receive operations are allocated, the interrupt
1840  * handler is registered with the OS, the watchdog timer is started,
1841  * and the stack is notified that the interface is ready.
1842  */
1843 static int ena_open(struct net_device *netdev)
1844 {
1845         struct ena_adapter *adapter = netdev_priv(netdev);
1846         int rc;
1847
1848         /* Notify the stack of the actual queue counts. */
1849         rc = netif_set_real_num_tx_queues(netdev, adapter->num_queues);
1850         if (rc) {
1851                 netif_err(adapter, ifup, netdev, "Can't set num tx queues\n");
1852                 return rc;
1853         }
1854
1855         rc = netif_set_real_num_rx_queues(netdev, adapter->num_queues);
1856         if (rc) {
1857                 netif_err(adapter, ifup, netdev, "Can't set num rx queues\n");
1858                 return rc;
1859         }
1860
1861         rc = ena_up(adapter);
1862         if (rc)
1863                 return rc;
1864
1865         return rc;
1866 }
1867
1868 /* ena_close - Disables a network interface
1869  * @netdev: network interface device structure
1870  *
1871  * Returns 0, this is not allowed to fail
1872  *
1873  * The close entry point is called when an interface is de-activated
1874  * by the OS.  The hardware is still under the drivers control, but
1875  * needs to be disabled.  A global MAC reset is issued to stop the
1876  * hardware, and all transmit and receive resources are freed.
1877  */
1878 static int ena_close(struct net_device *netdev)
1879 {
1880         struct ena_adapter *adapter = netdev_priv(netdev);
1881
1882         netif_dbg(adapter, ifdown, netdev, "%s\n", __func__);
1883
1884         if (test_bit(ENA_FLAG_DEV_UP, &adapter->flags))
1885                 ena_down(adapter);
1886
1887         return 0;
1888 }
1889
1890 static void ena_tx_csum(struct ena_com_tx_ctx *ena_tx_ctx, struct sk_buff *skb)
1891 {
1892         u32 mss = skb_shinfo(skb)->gso_size;
1893         struct ena_com_tx_meta *ena_meta = &ena_tx_ctx->ena_meta;
1894         u8 l4_protocol = 0;
1895
1896         if ((skb->ip_summed == CHECKSUM_PARTIAL) || mss) {
1897                 ena_tx_ctx->l4_csum_enable = 1;
1898                 if (mss) {
1899                         ena_tx_ctx->tso_enable = 1;
1900                         ena_meta->l4_hdr_len = tcp_hdr(skb)->doff;
1901                         ena_tx_ctx->l4_csum_partial = 0;
1902                 } else {
1903                         ena_tx_ctx->tso_enable = 0;
1904                         ena_meta->l4_hdr_len = 0;
1905                         ena_tx_ctx->l4_csum_partial = 1;
1906                 }
1907
1908                 switch (ip_hdr(skb)->version) {
1909                 case IPVERSION:
1910                         ena_tx_ctx->l3_proto = ENA_ETH_IO_L3_PROTO_IPV4;
1911                         if (ip_hdr(skb)->frag_off & htons(IP_DF))
1912                                 ena_tx_ctx->df = 1;
1913                         if (mss)
1914                                 ena_tx_ctx->l3_csum_enable = 1;
1915                         l4_protocol = ip_hdr(skb)->protocol;
1916                         break;
1917                 case 6:
1918                         ena_tx_ctx->l3_proto = ENA_ETH_IO_L3_PROTO_IPV6;
1919                         l4_protocol = ipv6_hdr(skb)->nexthdr;
1920                         break;
1921                 default:
1922                         break;
1923                 }
1924
1925                 if (l4_protocol == IPPROTO_TCP)
1926                         ena_tx_ctx->l4_proto = ENA_ETH_IO_L4_PROTO_TCP;
1927                 else
1928                         ena_tx_ctx->l4_proto = ENA_ETH_IO_L4_PROTO_UDP;
1929
1930                 ena_meta->mss = mss;
1931                 ena_meta->l3_hdr_len = skb_network_header_len(skb);
1932                 ena_meta->l3_hdr_offset = skb_network_offset(skb);
1933                 ena_tx_ctx->meta_valid = 1;
1934
1935         } else {
1936                 ena_tx_ctx->meta_valid = 0;
1937         }
1938 }
1939
1940 static int ena_check_and_linearize_skb(struct ena_ring *tx_ring,
1941                                        struct sk_buff *skb)
1942 {
1943         int num_frags, header_len, rc;
1944
1945         num_frags = skb_shinfo(skb)->nr_frags;
1946         header_len = skb_headlen(skb);
1947
1948         if (num_frags < tx_ring->sgl_size)
1949                 return 0;
1950
1951         if ((num_frags == tx_ring->sgl_size) &&
1952             (header_len < tx_ring->tx_max_header_size))
1953                 return 0;
1954
1955         u64_stats_update_begin(&tx_ring->syncp);
1956         tx_ring->tx_stats.linearize++;
1957         u64_stats_update_end(&tx_ring->syncp);
1958
1959         rc = skb_linearize(skb);
1960         if (unlikely(rc)) {
1961                 u64_stats_update_begin(&tx_ring->syncp);
1962                 tx_ring->tx_stats.linearize_failed++;
1963                 u64_stats_update_end(&tx_ring->syncp);
1964         }
1965
1966         return rc;
1967 }
1968
1969 /* Called with netif_tx_lock. */
1970 static netdev_tx_t ena_start_xmit(struct sk_buff *skb, struct net_device *dev)
1971 {
1972         struct ena_adapter *adapter = netdev_priv(dev);
1973         struct ena_tx_buffer *tx_info;
1974         struct ena_com_tx_ctx ena_tx_ctx;
1975         struct ena_ring *tx_ring;
1976         struct netdev_queue *txq;
1977         struct ena_com_buf *ena_buf;
1978         void *push_hdr;
1979         u32 len, last_frag;
1980         u16 next_to_use;
1981         u16 req_id;
1982         u16 push_len;
1983         u16 header_len;
1984         dma_addr_t dma;
1985         int qid, rc, nb_hw_desc;
1986         int i = -1;
1987
1988         netif_dbg(adapter, tx_queued, dev, "%s skb %p\n", __func__, skb);
1989         /*  Determine which tx ring we will be placed on */
1990         qid = skb_get_queue_mapping(skb);
1991         tx_ring = &adapter->tx_ring[qid];
1992         txq = netdev_get_tx_queue(dev, qid);
1993
1994         rc = ena_check_and_linearize_skb(tx_ring, skb);
1995         if (unlikely(rc))
1996                 goto error_drop_packet;
1997
1998         skb_tx_timestamp(skb);
1999         len = skb_headlen(skb);
2000
2001         next_to_use = tx_ring->next_to_use;
2002         req_id = tx_ring->free_tx_ids[next_to_use];
2003         tx_info = &tx_ring->tx_buffer_info[req_id];
2004         tx_info->num_of_bufs = 0;
2005
2006         WARN(tx_info->skb, "SKB isn't NULL req_id %d\n", req_id);
2007         ena_buf = tx_info->bufs;
2008         tx_info->skb = skb;
2009
2010         if (tx_ring->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) {
2011                 /* prepared the push buffer */
2012                 push_len = min_t(u32, len, tx_ring->tx_max_header_size);
2013                 header_len = push_len;
2014                 push_hdr = skb->data;
2015         } else {
2016                 push_len = 0;
2017                 header_len = min_t(u32, len, tx_ring->tx_max_header_size);
2018                 push_hdr = NULL;
2019         }
2020
2021         netif_dbg(adapter, tx_queued, dev,
2022                   "skb: %p header_buf->vaddr: %p push_len: %d\n", skb,
2023                   push_hdr, push_len);
2024
2025         if (len > push_len) {
2026                 dma = dma_map_single(tx_ring->dev, skb->data + push_len,
2027                                      len - push_len, DMA_TO_DEVICE);
2028                 if (dma_mapping_error(tx_ring->dev, dma))
2029                         goto error_report_dma_error;
2030
2031                 ena_buf->paddr = dma;
2032                 ena_buf->len = len - push_len;
2033
2034                 ena_buf++;
2035                 tx_info->num_of_bufs++;
2036         }
2037
2038         last_frag = skb_shinfo(skb)->nr_frags;
2039
2040         for (i = 0; i < last_frag; i++) {
2041                 const skb_frag_t *frag = &skb_shinfo(skb)->frags[i];
2042
2043                 len = skb_frag_size(frag);
2044                 dma = skb_frag_dma_map(tx_ring->dev, frag, 0, len,
2045                                        DMA_TO_DEVICE);
2046                 if (dma_mapping_error(tx_ring->dev, dma))
2047                         goto error_report_dma_error;
2048
2049                 ena_buf->paddr = dma;
2050                 ena_buf->len = len;
2051                 ena_buf++;
2052         }
2053
2054         tx_info->num_of_bufs += last_frag;
2055
2056         memset(&ena_tx_ctx, 0x0, sizeof(struct ena_com_tx_ctx));
2057         ena_tx_ctx.ena_bufs = tx_info->bufs;
2058         ena_tx_ctx.push_header = push_hdr;
2059         ena_tx_ctx.num_bufs = tx_info->num_of_bufs;
2060         ena_tx_ctx.req_id = req_id;
2061         ena_tx_ctx.header_len = header_len;
2062
2063         /* set flags and meta data */
2064         ena_tx_csum(&ena_tx_ctx, skb);
2065
2066         /* prepare the packet's descriptors to dma engine */
2067         rc = ena_com_prepare_tx(tx_ring->ena_com_io_sq, &ena_tx_ctx,
2068                                 &nb_hw_desc);
2069
2070         if (unlikely(rc)) {
2071                 netif_err(adapter, tx_queued, dev,
2072                           "failed to prepare tx bufs\n");
2073                 u64_stats_update_begin(&tx_ring->syncp);
2074                 tx_ring->tx_stats.queue_stop++;
2075                 tx_ring->tx_stats.prepare_ctx_err++;
2076                 u64_stats_update_end(&tx_ring->syncp);
2077                 netif_tx_stop_queue(txq);
2078                 goto error_unmap_dma;
2079         }
2080
2081         netdev_tx_sent_queue(txq, skb->len);
2082
2083         u64_stats_update_begin(&tx_ring->syncp);
2084         tx_ring->tx_stats.cnt++;
2085         tx_ring->tx_stats.bytes += skb->len;
2086         u64_stats_update_end(&tx_ring->syncp);
2087
2088         tx_info->tx_descs = nb_hw_desc;
2089         tx_info->last_jiffies = jiffies;
2090         tx_info->print_once = 0;
2091
2092         tx_ring->next_to_use = ENA_TX_RING_IDX_NEXT(next_to_use,
2093                 tx_ring->ring_size);
2094
2095         /* This WMB is aimed to:
2096          * 1 - perform smp barrier before reading next_to_completion
2097          * 2 - make sure the desc were written before trigger DB
2098          */
2099         wmb();
2100
2101         /* stop the queue when no more space available, the packet can have up
2102          * to sgl_size + 2. one for the meta descriptor and one for header
2103          * (if the header is larger than tx_max_header_size).
2104          */
2105         if (unlikely(ena_com_sq_empty_space(tx_ring->ena_com_io_sq) <
2106                      (tx_ring->sgl_size + 2))) {
2107                 netif_dbg(adapter, tx_queued, dev, "%s stop queue %d\n",
2108                           __func__, qid);
2109
2110                 netif_tx_stop_queue(txq);
2111                 u64_stats_update_begin(&tx_ring->syncp);
2112                 tx_ring->tx_stats.queue_stop++;
2113                 u64_stats_update_end(&tx_ring->syncp);
2114
2115                 /* There is a rare condition where this function decide to
2116                  * stop the queue but meanwhile clean_tx_irq updates
2117                  * next_to_completion and terminates.
2118                  * The queue will remain stopped forever.
2119                  * To solve this issue this function perform rmb, check
2120                  * the wakeup condition and wake up the queue if needed.
2121                  */
2122                 smp_rmb();
2123
2124                 if (ena_com_sq_empty_space(tx_ring->ena_com_io_sq)
2125                                 > ENA_TX_WAKEUP_THRESH) {
2126                         netif_tx_wake_queue(txq);
2127                         u64_stats_update_begin(&tx_ring->syncp);
2128                         tx_ring->tx_stats.queue_wakeup++;
2129                         u64_stats_update_end(&tx_ring->syncp);
2130                 }
2131         }
2132
2133         if (netif_xmit_stopped(txq) || !skb->xmit_more) {
2134                 /* trigger the dma engine */
2135                 ena_com_write_sq_doorbell(tx_ring->ena_com_io_sq);
2136                 u64_stats_update_begin(&tx_ring->syncp);
2137                 tx_ring->tx_stats.doorbells++;
2138                 u64_stats_update_end(&tx_ring->syncp);
2139         }
2140
2141         return NETDEV_TX_OK;
2142
2143 error_report_dma_error:
2144         u64_stats_update_begin(&tx_ring->syncp);
2145         tx_ring->tx_stats.dma_mapping_err++;
2146         u64_stats_update_end(&tx_ring->syncp);
2147         netdev_warn(adapter->netdev, "failed to map skb\n");
2148
2149         tx_info->skb = NULL;
2150
2151 error_unmap_dma:
2152         if (i >= 0) {
2153                 /* save value of frag that failed */
2154                 last_frag = i;
2155
2156                 /* start back at beginning and unmap skb */
2157                 tx_info->skb = NULL;
2158                 ena_buf = tx_info->bufs;
2159                 dma_unmap_single(tx_ring->dev, dma_unmap_addr(ena_buf, paddr),
2160                                  dma_unmap_len(ena_buf, len), DMA_TO_DEVICE);
2161
2162                 /* unmap remaining mapped pages */
2163                 for (i = 0; i < last_frag; i++) {
2164                         ena_buf++;
2165                         dma_unmap_page(tx_ring->dev, dma_unmap_addr(ena_buf, paddr),
2166                                        dma_unmap_len(ena_buf, len), DMA_TO_DEVICE);
2167                 }
2168         }
2169
2170 error_drop_packet:
2171
2172         dev_kfree_skb(skb);
2173         return NETDEV_TX_OK;
2174 }
2175
2176 #ifdef CONFIG_NET_POLL_CONTROLLER
2177 static void ena_netpoll(struct net_device *netdev)
2178 {
2179         struct ena_adapter *adapter = netdev_priv(netdev);
2180         int i;
2181
2182         /* Dont schedule NAPI if the driver is in the middle of reset
2183          * or netdev is down.
2184          */
2185
2186         if (!test_bit(ENA_FLAG_DEV_UP, &adapter->flags) ||
2187             test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags))
2188                 return;
2189
2190         for (i = 0; i < adapter->num_queues; i++)
2191                 napi_schedule(&adapter->ena_napi[i].napi);
2192 }
2193 #endif /* CONFIG_NET_POLL_CONTROLLER */
2194
2195 static u16 ena_select_queue(struct net_device *dev, struct sk_buff *skb,
2196                             void *accel_priv, select_queue_fallback_t fallback)
2197 {
2198         u16 qid;
2199         /* we suspect that this is good for in--kernel network services that
2200          * want to loop incoming skb rx to tx in normal user generated traffic,
2201          * most probably we will not get to this
2202          */
2203         if (skb_rx_queue_recorded(skb))
2204                 qid = skb_get_rx_queue(skb);
2205         else
2206                 qid = fallback(dev, skb);
2207
2208         return qid;
2209 }
2210
2211 static void ena_config_host_info(struct ena_com_dev *ena_dev)
2212 {
2213         struct ena_admin_host_info *host_info;
2214         int rc;
2215
2216         /* Allocate only the host info */
2217         rc = ena_com_allocate_host_info(ena_dev);
2218         if (rc) {
2219                 pr_err("Cannot allocate host info\n");
2220                 return;
2221         }
2222
2223         host_info = ena_dev->host_attr.host_info;
2224
2225         host_info->os_type = ENA_ADMIN_OS_LINUX;
2226         host_info->kernel_ver = LINUX_VERSION_CODE;
2227         strncpy(host_info->kernel_ver_str, utsname()->version,
2228                 sizeof(host_info->kernel_ver_str) - 1);
2229         host_info->os_dist = 0;
2230         strncpy(host_info->os_dist_str, utsname()->release,
2231                 sizeof(host_info->os_dist_str) - 1);
2232         host_info->driver_version =
2233                 (DRV_MODULE_VER_MAJOR) |
2234                 (DRV_MODULE_VER_MINOR << ENA_ADMIN_HOST_INFO_MINOR_SHIFT) |
2235                 (DRV_MODULE_VER_SUBMINOR << ENA_ADMIN_HOST_INFO_SUB_MINOR_SHIFT);
2236
2237         rc = ena_com_set_host_attributes(ena_dev);
2238         if (rc) {
2239                 if (rc == -EOPNOTSUPP)
2240                         pr_warn("Cannot set host attributes\n");
2241                 else
2242                         pr_err("Cannot set host attributes\n");
2243
2244                 goto err;
2245         }
2246
2247         return;
2248
2249 err:
2250         ena_com_delete_host_info(ena_dev);
2251 }
2252
2253 static void ena_config_debug_area(struct ena_adapter *adapter)
2254 {
2255         u32 debug_area_size;
2256         int rc, ss_count;
2257
2258         ss_count = ena_get_sset_count(adapter->netdev, ETH_SS_STATS);
2259         if (ss_count <= 0) {
2260                 netif_err(adapter, drv, adapter->netdev,
2261                           "SS count is negative\n");
2262                 return;
2263         }
2264
2265         /* allocate 32 bytes for each string and 64bit for the value */
2266         debug_area_size = ss_count * ETH_GSTRING_LEN + sizeof(u64) * ss_count;
2267
2268         rc = ena_com_allocate_debug_area(adapter->ena_dev, debug_area_size);
2269         if (rc) {
2270                 pr_err("Cannot allocate debug area\n");
2271                 return;
2272         }
2273
2274         rc = ena_com_set_host_attributes(adapter->ena_dev);
2275         if (rc) {
2276                 if (rc == -EOPNOTSUPP)
2277                         netif_warn(adapter, drv, adapter->netdev,
2278                                    "Cannot set host attributes\n");
2279                 else
2280                         netif_err(adapter, drv, adapter->netdev,
2281                                   "Cannot set host attributes\n");
2282                 goto err;
2283         }
2284
2285         return;
2286 err:
2287         ena_com_delete_debug_area(adapter->ena_dev);
2288 }
2289
2290 static void ena_get_stats64(struct net_device *netdev,
2291                             struct rtnl_link_stats64 *stats)
2292 {
2293         struct ena_adapter *adapter = netdev_priv(netdev);
2294         struct ena_ring *rx_ring, *tx_ring;
2295         unsigned int start;
2296         u64 rx_drops;
2297         int i;
2298
2299         if (!test_bit(ENA_FLAG_DEV_UP, &adapter->flags))
2300                 return;
2301
2302         for (i = 0; i < adapter->num_queues; i++) {
2303                 u64 bytes, packets;
2304
2305                 tx_ring = &adapter->tx_ring[i];
2306
2307                 do {
2308                         start = u64_stats_fetch_begin_irq(&tx_ring->syncp);
2309                         packets = tx_ring->tx_stats.cnt;
2310                         bytes = tx_ring->tx_stats.bytes;
2311                 } while (u64_stats_fetch_retry_irq(&tx_ring->syncp, start));
2312
2313                 stats->tx_packets += packets;
2314                 stats->tx_bytes += bytes;
2315
2316                 rx_ring = &adapter->rx_ring[i];
2317
2318                 do {
2319                         start = u64_stats_fetch_begin_irq(&rx_ring->syncp);
2320                         packets = rx_ring->rx_stats.cnt;
2321                         bytes = rx_ring->rx_stats.bytes;
2322                 } while (u64_stats_fetch_retry_irq(&rx_ring->syncp, start));
2323
2324                 stats->rx_packets += packets;
2325                 stats->rx_bytes += bytes;
2326         }
2327
2328         do {
2329                 start = u64_stats_fetch_begin_irq(&adapter->syncp);
2330                 rx_drops = adapter->dev_stats.rx_drops;
2331         } while (u64_stats_fetch_retry_irq(&adapter->syncp, start));
2332
2333         stats->rx_dropped = rx_drops;
2334
2335         stats->multicast = 0;
2336         stats->collisions = 0;
2337
2338         stats->rx_length_errors = 0;
2339         stats->rx_crc_errors = 0;
2340         stats->rx_frame_errors = 0;
2341         stats->rx_fifo_errors = 0;
2342         stats->rx_missed_errors = 0;
2343         stats->tx_window_errors = 0;
2344
2345         stats->rx_errors = 0;
2346         stats->tx_errors = 0;
2347 }
2348
2349 static const struct net_device_ops ena_netdev_ops = {
2350         .ndo_open               = ena_open,
2351         .ndo_stop               = ena_close,
2352         .ndo_start_xmit         = ena_start_xmit,
2353         .ndo_select_queue       = ena_select_queue,
2354         .ndo_get_stats64        = ena_get_stats64,
2355         .ndo_tx_timeout         = ena_tx_timeout,
2356         .ndo_change_mtu         = ena_change_mtu,
2357         .ndo_set_mac_address    = NULL,
2358         .ndo_validate_addr      = eth_validate_addr,
2359 #ifdef CONFIG_NET_POLL_CONTROLLER
2360         .ndo_poll_controller    = ena_netpoll,
2361 #endif /* CONFIG_NET_POLL_CONTROLLER */
2362 };
2363
2364 static void ena_device_io_suspend(struct work_struct *work)
2365 {
2366         struct ena_adapter *adapter =
2367                 container_of(work, struct ena_adapter, suspend_io_task);
2368         struct net_device *netdev = adapter->netdev;
2369
2370         /* ena_napi_disable_all disables only the IO handling.
2371          * We are still subject to AENQ keep alive watchdog.
2372          */
2373         u64_stats_update_begin(&adapter->syncp);
2374         adapter->dev_stats.io_suspend++;
2375         u64_stats_update_begin(&adapter->syncp);
2376         ena_napi_disable_all(adapter);
2377         netif_tx_lock(netdev);
2378         netif_device_detach(netdev);
2379         netif_tx_unlock(netdev);
2380 }
2381
2382 static void ena_device_io_resume(struct work_struct *work)
2383 {
2384         struct ena_adapter *adapter =
2385                 container_of(work, struct ena_adapter, resume_io_task);
2386         struct net_device *netdev = adapter->netdev;
2387
2388         u64_stats_update_begin(&adapter->syncp);
2389         adapter->dev_stats.io_resume++;
2390         u64_stats_update_end(&adapter->syncp);
2391
2392         netif_device_attach(netdev);
2393         ena_napi_enable_all(adapter);
2394 }
2395
2396 static int ena_device_validate_params(struct ena_adapter *adapter,
2397                                       struct ena_com_dev_get_features_ctx *get_feat_ctx)
2398 {
2399         struct net_device *netdev = adapter->netdev;
2400         int rc;
2401
2402         rc = ether_addr_equal(get_feat_ctx->dev_attr.mac_addr,
2403                               adapter->mac_addr);
2404         if (!rc) {
2405                 netif_err(adapter, drv, netdev,
2406                           "Error, mac address are different\n");
2407                 return -EINVAL;
2408         }
2409
2410         if ((get_feat_ctx->max_queues.max_cq_num < adapter->num_queues) ||
2411             (get_feat_ctx->max_queues.max_sq_num < adapter->num_queues)) {
2412                 netif_err(adapter, drv, netdev,
2413                           "Error, device doesn't support enough queues\n");
2414                 return -EINVAL;
2415         }
2416
2417         if (get_feat_ctx->dev_attr.max_mtu < netdev->mtu) {
2418                 netif_err(adapter, drv, netdev,
2419                           "Error, device max mtu is smaller than netdev MTU\n");
2420                 return -EINVAL;
2421         }
2422
2423         return 0;
2424 }
2425
2426 static int ena_device_init(struct ena_com_dev *ena_dev, struct pci_dev *pdev,
2427                            struct ena_com_dev_get_features_ctx *get_feat_ctx,
2428                            bool *wd_state)
2429 {
2430         struct device *dev = &pdev->dev;
2431         bool readless_supported;
2432         u32 aenq_groups;
2433         int dma_width;
2434         int rc;
2435
2436         rc = ena_com_mmio_reg_read_request_init(ena_dev);
2437         if (rc) {
2438                 dev_err(dev, "failed to init mmio read less\n");
2439                 return rc;
2440         }
2441
2442         /* The PCIe configuration space revision id indicate if mmio reg
2443          * read is disabled
2444          */
2445         readless_supported = !(pdev->revision & ENA_MMIO_DISABLE_REG_READ);
2446         ena_com_set_mmio_read_mode(ena_dev, readless_supported);
2447
2448         rc = ena_com_dev_reset(ena_dev, ENA_REGS_RESET_NORMAL);
2449         if (rc) {
2450                 dev_err(dev, "Can not reset device\n");
2451                 goto err_mmio_read_less;
2452         }
2453
2454         rc = ena_com_validate_version(ena_dev);
2455         if (rc) {
2456                 dev_err(dev, "device version is too low\n");
2457                 goto err_mmio_read_less;
2458         }
2459
2460         dma_width = ena_com_get_dma_width(ena_dev);
2461         if (dma_width < 0) {
2462                 dev_err(dev, "Invalid dma width value %d", dma_width);
2463                 rc = dma_width;
2464                 goto err_mmio_read_less;
2465         }
2466
2467         rc = pci_set_dma_mask(pdev, DMA_BIT_MASK(dma_width));
2468         if (rc) {
2469                 dev_err(dev, "pci_set_dma_mask failed 0x%x\n", rc);
2470                 goto err_mmio_read_less;
2471         }
2472
2473         rc = pci_set_consistent_dma_mask(pdev, DMA_BIT_MASK(dma_width));
2474         if (rc) {
2475                 dev_err(dev, "err_pci_set_consistent_dma_mask failed 0x%x\n",
2476                         rc);
2477                 goto err_mmio_read_less;
2478         }
2479
2480         /* ENA admin level init */
2481         rc = ena_com_admin_init(ena_dev, &aenq_handlers, true);
2482         if (rc) {
2483                 dev_err(dev,
2484                         "Can not initialize ena admin queue with device\n");
2485                 goto err_mmio_read_less;
2486         }
2487
2488         /* To enable the msix interrupts the driver needs to know the number
2489          * of queues. So the driver uses polling mode to retrieve this
2490          * information
2491          */
2492         ena_com_set_admin_polling_mode(ena_dev, true);
2493
2494         ena_config_host_info(ena_dev);
2495
2496         /* Get Device Attributes*/
2497         rc = ena_com_get_dev_attr_feat(ena_dev, get_feat_ctx);
2498         if (rc) {
2499                 dev_err(dev, "Cannot get attribute for ena device rc=%d\n", rc);
2500                 goto err_admin_init;
2501         }
2502
2503         /* Try to turn all the available aenq groups */
2504         aenq_groups = BIT(ENA_ADMIN_LINK_CHANGE) |
2505                 BIT(ENA_ADMIN_FATAL_ERROR) |
2506                 BIT(ENA_ADMIN_WARNING) |
2507                 BIT(ENA_ADMIN_NOTIFICATION) |
2508                 BIT(ENA_ADMIN_KEEP_ALIVE);
2509
2510         aenq_groups &= get_feat_ctx->aenq.supported_groups;
2511
2512         rc = ena_com_set_aenq_config(ena_dev, aenq_groups);
2513         if (rc) {
2514                 dev_err(dev, "Cannot configure aenq groups rc= %d\n", rc);
2515                 goto err_admin_init;
2516         }
2517
2518         *wd_state = !!(aenq_groups & BIT(ENA_ADMIN_KEEP_ALIVE));
2519
2520         return 0;
2521
2522 err_admin_init:
2523         ena_com_delete_host_info(ena_dev);
2524         ena_com_admin_destroy(ena_dev);
2525 err_mmio_read_less:
2526         ena_com_mmio_reg_read_request_destroy(ena_dev);
2527
2528         return rc;
2529 }
2530
2531 static int ena_enable_msix_and_set_admin_interrupts(struct ena_adapter *adapter,
2532                                                     int io_vectors)
2533 {
2534         struct ena_com_dev *ena_dev = adapter->ena_dev;
2535         struct device *dev = &adapter->pdev->dev;
2536         int rc;
2537
2538         rc = ena_enable_msix(adapter, io_vectors);
2539         if (rc) {
2540                 dev_err(dev, "Can not reserve msix vectors\n");
2541                 return rc;
2542         }
2543
2544         ena_setup_mgmnt_intr(adapter);
2545
2546         rc = ena_request_mgmnt_irq(adapter);
2547         if (rc) {
2548                 dev_err(dev, "Can not setup management interrupts\n");
2549                 goto err_disable_msix;
2550         }
2551
2552         ena_com_set_admin_polling_mode(ena_dev, false);
2553
2554         ena_com_admin_aenq_enable(ena_dev);
2555
2556         return 0;
2557
2558 err_disable_msix:
2559         ena_disable_msix(adapter);
2560
2561         return rc;
2562 }
2563
2564 static void ena_fw_reset_device(struct work_struct *work)
2565 {
2566         struct ena_com_dev_get_features_ctx get_feat_ctx;
2567         struct ena_adapter *adapter =
2568                 container_of(work, struct ena_adapter, reset_task);
2569         struct net_device *netdev = adapter->netdev;
2570         struct ena_com_dev *ena_dev = adapter->ena_dev;
2571         struct pci_dev *pdev = adapter->pdev;
2572         bool dev_up, wd_state;
2573         int rc;
2574
2575         if (unlikely(!test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags))) {
2576                 dev_err(&pdev->dev,
2577                         "device reset schedule while reset bit is off\n");
2578                 return;
2579         }
2580
2581         netif_carrier_off(netdev);
2582
2583         del_timer_sync(&adapter->timer_service);
2584
2585         rtnl_lock();
2586
2587         dev_up = test_bit(ENA_FLAG_DEV_UP, &adapter->flags);
2588         ena_com_set_admin_running_state(ena_dev, false);
2589
2590         /* After calling ena_close the tx queues and the napi
2591          * are disabled so no one can interfere or touch the
2592          * data structures
2593          */
2594         ena_close(netdev);
2595
2596         ena_free_mgmnt_irq(adapter);
2597
2598         ena_disable_msix(adapter);
2599
2600         ena_com_abort_admin_commands(ena_dev);
2601
2602         ena_com_wait_for_abort_completion(ena_dev);
2603
2604         ena_com_admin_destroy(ena_dev);
2605
2606         ena_com_mmio_reg_read_request_destroy(ena_dev);
2607
2608         adapter->reset_reason = ENA_REGS_RESET_NORMAL;
2609         clear_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
2610
2611         /* Finish with the destroy part. Start the init part */
2612
2613         rc = ena_device_init(ena_dev, adapter->pdev, &get_feat_ctx, &wd_state);
2614         if (rc) {
2615                 dev_err(&pdev->dev, "Can not initialize device\n");
2616                 goto err;
2617         }
2618         adapter->wd_state = wd_state;
2619
2620         rc = ena_device_validate_params(adapter, &get_feat_ctx);
2621         if (rc) {
2622                 dev_err(&pdev->dev, "Validation of device parameters failed\n");
2623                 goto err_device_destroy;
2624         }
2625
2626         rc = ena_enable_msix_and_set_admin_interrupts(adapter,
2627                                                       adapter->num_queues);
2628         if (rc) {
2629                 dev_err(&pdev->dev, "Enable MSI-X failed\n");
2630                 goto err_device_destroy;
2631         }
2632         /* If the interface was up before the reset bring it up */
2633         if (dev_up) {
2634                 rc = ena_up(adapter);
2635                 if (rc) {
2636                         dev_err(&pdev->dev, "Failed to create I/O queues\n");
2637                         goto err_disable_msix;
2638                 }
2639         }
2640
2641         mod_timer(&adapter->timer_service, round_jiffies(jiffies + HZ));
2642
2643         rtnl_unlock();
2644
2645         dev_err(&pdev->dev, "Device reset completed successfully\n");
2646
2647         return;
2648 err_disable_msix:
2649         ena_free_mgmnt_irq(adapter);
2650         ena_disable_msix(adapter);
2651 err_device_destroy:
2652         ena_com_admin_destroy(ena_dev);
2653 err:
2654         rtnl_unlock();
2655
2656         clear_bit(ENA_FLAG_DEVICE_RUNNING, &adapter->flags);
2657
2658         dev_err(&pdev->dev,
2659                 "Reset attempt failed. Can not reset the device\n");
2660 }
2661
2662 static int check_missing_comp_in_queue(struct ena_adapter *adapter,
2663                                        struct ena_ring *tx_ring)
2664 {
2665         struct ena_tx_buffer *tx_buf;
2666         unsigned long last_jiffies;
2667         u32 missed_tx = 0;
2668         int i;
2669
2670         for (i = 0; i < tx_ring->ring_size; i++) {
2671                 tx_buf = &tx_ring->tx_buffer_info[i];
2672                 last_jiffies = tx_buf->last_jiffies;
2673                 if (unlikely(last_jiffies &&
2674                              time_is_before_jiffies(last_jiffies + adapter->missing_tx_completion_to))) {
2675                         if (!tx_buf->print_once)
2676                                 netif_notice(adapter, tx_err, adapter->netdev,
2677                                              "Found a Tx that wasn't completed on time, qid %d, index %d.\n",
2678                                              tx_ring->qid, i);
2679
2680                         tx_buf->print_once = 1;
2681                         missed_tx++;
2682
2683                         if (unlikely(missed_tx > adapter->missing_tx_completion_threshold)) {
2684                                 netif_err(adapter, tx_err, adapter->netdev,
2685                                           "The number of lost tx completions is above the threshold (%d > %d). Reset the device\n",
2686                                           missed_tx,
2687                                           adapter->missing_tx_completion_threshold);
2688                                 adapter->reset_reason =
2689                                         ENA_REGS_RESET_MISS_TX_CMPL;
2690                                 set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
2691                                 return -EIO;
2692                         }
2693                 }
2694         }
2695
2696         return 0;
2697 }
2698
2699 static void check_for_missing_tx_completions(struct ena_adapter *adapter)
2700 {
2701         struct ena_ring *tx_ring;
2702         int i, budget, rc;
2703
2704         /* Make sure the driver doesn't turn the device in other process */
2705         smp_rmb();
2706
2707         if (!test_bit(ENA_FLAG_DEV_UP, &adapter->flags))
2708                 return;
2709
2710         if (test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags))
2711                 return;
2712
2713         if (adapter->missing_tx_completion_to == ENA_HW_HINTS_NO_TIMEOUT)
2714                 return;
2715
2716         budget = ENA_MONITORED_TX_QUEUES;
2717
2718         for (i = adapter->last_monitored_tx_qid; i < adapter->num_queues; i++) {
2719                 tx_ring = &adapter->tx_ring[i];
2720
2721                 rc = check_missing_comp_in_queue(adapter, tx_ring);
2722                 if (unlikely(rc))
2723                         return;
2724
2725                 budget--;
2726                 if (!budget)
2727                         break;
2728         }
2729
2730         adapter->last_monitored_tx_qid = i % adapter->num_queues;
2731 }
2732
2733 /* trigger napi schedule after 2 consecutive detections */
2734 #define EMPTY_RX_REFILL 2
2735 /* For the rare case where the device runs out of Rx descriptors and the
2736  * napi handler failed to refill new Rx descriptors (due to a lack of memory
2737  * for example).
2738  * This case will lead to a deadlock:
2739  * The device won't send interrupts since all the new Rx packets will be dropped
2740  * The napi handler won't allocate new Rx descriptors so the device will be
2741  * able to send new packets.
2742  *
2743  * This scenario can happen when the kernel's vm.min_free_kbytes is too small.
2744  * It is recommended to have at least 512MB, with a minimum of 128MB for
2745  * constrained environment).
2746  *
2747  * When such a situation is detected - Reschedule napi
2748  */
2749 static void check_for_empty_rx_ring(struct ena_adapter *adapter)
2750 {
2751         struct ena_ring *rx_ring;
2752         int i, refill_required;
2753
2754         if (!test_bit(ENA_FLAG_DEV_UP, &adapter->flags))
2755                 return;
2756
2757         if (test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags))
2758                 return;
2759
2760         for (i = 0; i < adapter->num_queues; i++) {
2761                 rx_ring = &adapter->rx_ring[i];
2762
2763                 refill_required =
2764                         ena_com_sq_empty_space(rx_ring->ena_com_io_sq);
2765                 if (unlikely(refill_required == (rx_ring->ring_size - 1))) {
2766                         rx_ring->empty_rx_queue++;
2767
2768                         if (rx_ring->empty_rx_queue >= EMPTY_RX_REFILL) {
2769                                 u64_stats_update_begin(&rx_ring->syncp);
2770                                 rx_ring->rx_stats.empty_rx_ring++;
2771                                 u64_stats_update_end(&rx_ring->syncp);
2772
2773                                 netif_err(adapter, drv, adapter->netdev,
2774                                           "trigger refill for ring %d\n", i);
2775
2776                                 napi_schedule(rx_ring->napi);
2777                                 rx_ring->empty_rx_queue = 0;
2778                         }
2779                 } else {
2780                         rx_ring->empty_rx_queue = 0;
2781                 }
2782         }
2783 }
2784
2785 /* Check for keep alive expiration */
2786 static void check_for_missing_keep_alive(struct ena_adapter *adapter)
2787 {
2788         unsigned long keep_alive_expired;
2789
2790         if (!adapter->wd_state)
2791                 return;
2792
2793         if (adapter->keep_alive_timeout == ENA_HW_HINTS_NO_TIMEOUT)
2794                 return;
2795
2796         keep_alive_expired = round_jiffies(adapter->last_keep_alive_jiffies +
2797                                            adapter->keep_alive_timeout);
2798         if (unlikely(time_is_before_jiffies(keep_alive_expired))) {
2799                 netif_err(adapter, drv, adapter->netdev,
2800                           "Keep alive watchdog timeout.\n");
2801                 u64_stats_update_begin(&adapter->syncp);
2802                 adapter->dev_stats.wd_expired++;
2803                 u64_stats_update_end(&adapter->syncp);
2804                 adapter->reset_reason = ENA_REGS_RESET_KEEP_ALIVE_TO;
2805                 set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
2806         }
2807 }
2808
2809 static void check_for_admin_com_state(struct ena_adapter *adapter)
2810 {
2811         if (unlikely(!ena_com_get_admin_running_state(adapter->ena_dev))) {
2812                 netif_err(adapter, drv, adapter->netdev,
2813                           "ENA admin queue is not in running state!\n");
2814                 u64_stats_update_begin(&adapter->syncp);
2815                 adapter->dev_stats.admin_q_pause++;
2816                 u64_stats_update_end(&adapter->syncp);
2817                 adapter->reset_reason = ENA_REGS_RESET_ADMIN_TO;
2818                 set_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags);
2819         }
2820 }
2821
2822 static void ena_update_hints(struct ena_adapter *adapter,
2823                              struct ena_admin_ena_hw_hints *hints)
2824 {
2825         struct net_device *netdev = adapter->netdev;
2826
2827         if (hints->admin_completion_tx_timeout)
2828                 adapter->ena_dev->admin_queue.completion_timeout =
2829                         hints->admin_completion_tx_timeout * 1000;
2830
2831         if (hints->mmio_read_timeout)
2832                 /* convert to usec */
2833                 adapter->ena_dev->mmio_read.reg_read_to =
2834                         hints->mmio_read_timeout * 1000;
2835
2836         if (hints->missed_tx_completion_count_threshold_to_reset)
2837                 adapter->missing_tx_completion_threshold =
2838                         hints->missed_tx_completion_count_threshold_to_reset;
2839
2840         if (hints->missing_tx_completion_timeout) {
2841                 if (hints->missing_tx_completion_timeout == ENA_HW_HINTS_NO_TIMEOUT)
2842                         adapter->missing_tx_completion_to = ENA_HW_HINTS_NO_TIMEOUT;
2843                 else
2844                         adapter->missing_tx_completion_to =
2845                                 msecs_to_jiffies(hints->missing_tx_completion_timeout);
2846         }
2847
2848         if (hints->netdev_wd_timeout)
2849                 netdev->watchdog_timeo = msecs_to_jiffies(hints->netdev_wd_timeout);
2850
2851         if (hints->driver_watchdog_timeout) {
2852                 if (hints->driver_watchdog_timeout == ENA_HW_HINTS_NO_TIMEOUT)
2853                         adapter->keep_alive_timeout = ENA_HW_HINTS_NO_TIMEOUT;
2854                 else
2855                         adapter->keep_alive_timeout =
2856                                 msecs_to_jiffies(hints->driver_watchdog_timeout);
2857         }
2858 }
2859
2860 static void ena_update_host_info(struct ena_admin_host_info *host_info,
2861                                  struct net_device *netdev)
2862 {
2863         host_info->supported_network_features[0] =
2864                 netdev->features & GENMASK_ULL(31, 0);
2865         host_info->supported_network_features[1] =
2866                 (netdev->features & GENMASK_ULL(63, 32)) >> 32;
2867 }
2868
2869 static void ena_timer_service(unsigned long data)
2870 {
2871         struct ena_adapter *adapter = (struct ena_adapter *)data;
2872         u8 *debug_area = adapter->ena_dev->host_attr.debug_area_virt_addr;
2873         struct ena_admin_host_info *host_info =
2874                 adapter->ena_dev->host_attr.host_info;
2875
2876         check_for_missing_keep_alive(adapter);
2877
2878         check_for_admin_com_state(adapter);
2879
2880         check_for_missing_tx_completions(adapter);
2881
2882         check_for_empty_rx_ring(adapter);
2883
2884         if (debug_area)
2885                 ena_dump_stats_to_buf(adapter, debug_area);
2886
2887         if (host_info)
2888                 ena_update_host_info(host_info, adapter->netdev);
2889
2890         if (unlikely(test_bit(ENA_FLAG_TRIGGER_RESET, &adapter->flags))) {
2891                 netif_err(adapter, drv, adapter->netdev,
2892                           "Trigger reset is on\n");
2893                 ena_dump_stats_to_dmesg(adapter);
2894                 queue_work(ena_wq, &adapter->reset_task);
2895                 return;
2896         }
2897
2898         /* Reset the timer */
2899         mod_timer(&adapter->timer_service, jiffies + HZ);
2900 }
2901
2902 static int ena_calc_io_queue_num(struct pci_dev *pdev,
2903                                  struct ena_com_dev *ena_dev,
2904                                  struct ena_com_dev_get_features_ctx *get_feat_ctx)
2905 {
2906         int io_sq_num, io_queue_num;
2907
2908         /* In case of LLQ use the llq number in the get feature cmd */
2909         if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) {
2910                 io_sq_num = get_feat_ctx->max_queues.max_llq_num;
2911
2912                 if (io_sq_num == 0) {
2913                         dev_err(&pdev->dev,
2914                                 "Trying to use LLQ but llq_num is 0. Fall back into regular queues\n");
2915
2916                         ena_dev->tx_mem_queue_type =
2917                                 ENA_ADMIN_PLACEMENT_POLICY_HOST;
2918                         io_sq_num = get_feat_ctx->max_queues.max_sq_num;
2919                 }
2920         } else {
2921                 io_sq_num = get_feat_ctx->max_queues.max_sq_num;
2922         }
2923
2924         io_queue_num = min_t(int, num_online_cpus(), ENA_MAX_NUM_IO_QUEUES);
2925         io_queue_num = min_t(int, io_queue_num, io_sq_num);
2926         io_queue_num = min_t(int, io_queue_num,
2927                              get_feat_ctx->max_queues.max_cq_num);
2928         /* 1 IRQ for for mgmnt and 1 IRQs for each IO direction */
2929         io_queue_num = min_t(int, io_queue_num, pci_msix_vec_count(pdev) - 1);
2930         if (unlikely(!io_queue_num)) {
2931                 dev_err(&pdev->dev, "The device doesn't have io queues\n");
2932                 return -EFAULT;
2933         }
2934
2935         return io_queue_num;
2936 }
2937
2938 static void ena_set_push_mode(struct pci_dev *pdev, struct ena_com_dev *ena_dev,
2939                               struct ena_com_dev_get_features_ctx *get_feat_ctx)
2940 {
2941         bool has_mem_bar;
2942
2943         has_mem_bar = pci_select_bars(pdev, IORESOURCE_MEM) & BIT(ENA_MEM_BAR);
2944
2945         /* Enable push mode if device supports LLQ */
2946         if (has_mem_bar && (get_feat_ctx->max_queues.max_llq_num > 0))
2947                 ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_DEV;
2948         else
2949                 ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST;
2950 }
2951
2952 static void ena_set_dev_offloads(struct ena_com_dev_get_features_ctx *feat,
2953                                  struct net_device *netdev)
2954 {
2955         netdev_features_t dev_features = 0;
2956
2957         /* Set offload features */
2958         if (feat->offload.tx &
2959                 ENA_ADMIN_FEATURE_OFFLOAD_DESC_TX_L4_IPV4_CSUM_PART_MASK)
2960                 dev_features |= NETIF_F_IP_CSUM;
2961
2962         if (feat->offload.tx &
2963                 ENA_ADMIN_FEATURE_OFFLOAD_DESC_TX_L4_IPV6_CSUM_PART_MASK)
2964                 dev_features |= NETIF_F_IPV6_CSUM;
2965
2966         if (feat->offload.tx & ENA_ADMIN_FEATURE_OFFLOAD_DESC_TSO_IPV4_MASK)
2967                 dev_features |= NETIF_F_TSO;
2968
2969         if (feat->offload.tx & ENA_ADMIN_FEATURE_OFFLOAD_DESC_TSO_IPV6_MASK)
2970                 dev_features |= NETIF_F_TSO6;
2971
2972         if (feat->offload.tx & ENA_ADMIN_FEATURE_OFFLOAD_DESC_TSO_ECN_MASK)
2973                 dev_features |= NETIF_F_TSO_ECN;
2974
2975         if (feat->offload.rx_supported &
2976                 ENA_ADMIN_FEATURE_OFFLOAD_DESC_RX_L4_IPV4_CSUM_MASK)
2977                 dev_features |= NETIF_F_RXCSUM;
2978
2979         if (feat->offload.rx_supported &
2980                 ENA_ADMIN_FEATURE_OFFLOAD_DESC_RX_L4_IPV6_CSUM_MASK)
2981                 dev_features |= NETIF_F_RXCSUM;
2982
2983         netdev->features =
2984                 dev_features |
2985                 NETIF_F_SG |
2986                 NETIF_F_RXHASH |
2987                 NETIF_F_HIGHDMA;
2988
2989         netdev->hw_features |= netdev->features;
2990         netdev->vlan_features |= netdev->features;
2991 }
2992
2993 static void ena_set_conf_feat_params(struct ena_adapter *adapter,
2994                                      struct ena_com_dev_get_features_ctx *feat)
2995 {
2996         struct net_device *netdev = adapter->netdev;
2997
2998         /* Copy mac address */
2999         if (!is_valid_ether_addr(feat->dev_attr.mac_addr)) {
3000                 eth_hw_addr_random(netdev);
3001                 ether_addr_copy(adapter->mac_addr, netdev->dev_addr);
3002         } else {
3003                 ether_addr_copy(adapter->mac_addr, feat->dev_attr.mac_addr);
3004                 ether_addr_copy(netdev->dev_addr, adapter->mac_addr);
3005         }
3006
3007         /* Set offload features */
3008         ena_set_dev_offloads(feat, netdev);
3009
3010         adapter->max_mtu = feat->dev_attr.max_mtu;
3011         netdev->max_mtu = adapter->max_mtu;
3012         netdev->min_mtu = ENA_MIN_MTU;
3013 }
3014
3015 static int ena_rss_init_default(struct ena_adapter *adapter)
3016 {
3017         struct ena_com_dev *ena_dev = adapter->ena_dev;
3018         struct device *dev = &adapter->pdev->dev;
3019         int rc, i;
3020         u32 val;
3021
3022         rc = ena_com_rss_init(ena_dev, ENA_RX_RSS_TABLE_LOG_SIZE);
3023         if (unlikely(rc)) {
3024                 dev_err(dev, "Cannot init indirect table\n");
3025                 goto err_rss_init;
3026         }
3027
3028         for (i = 0; i < ENA_RX_RSS_TABLE_SIZE; i++) {
3029                 val = ethtool_rxfh_indir_default(i, adapter->num_queues);
3030                 rc = ena_com_indirect_table_fill_entry(ena_dev, i,
3031                                                        ENA_IO_RXQ_IDX(val));
3032                 if (unlikely(rc && (rc != -EOPNOTSUPP))) {
3033                         dev_err(dev, "Cannot fill indirect table\n");
3034                         goto err_fill_indir;
3035                 }
3036         }
3037
3038         rc = ena_com_fill_hash_function(ena_dev, ENA_ADMIN_CRC32, NULL,
3039                                         ENA_HASH_KEY_SIZE, 0xFFFFFFFF);
3040         if (unlikely(rc && (rc != -EOPNOTSUPP))) {
3041                 dev_err(dev, "Cannot fill hash function\n");
3042                 goto err_fill_indir;
3043         }
3044
3045         rc = ena_com_set_default_hash_ctrl(ena_dev);
3046         if (unlikely(rc && (rc != -EOPNOTSUPP))) {
3047                 dev_err(dev, "Cannot fill hash control\n");
3048                 goto err_fill_indir;
3049         }
3050
3051         return 0;
3052
3053 err_fill_indir:
3054         ena_com_rss_destroy(ena_dev);
3055 err_rss_init:
3056
3057         return rc;
3058 }
3059
3060 static void ena_release_bars(struct ena_com_dev *ena_dev, struct pci_dev *pdev)
3061 {
3062         int release_bars;
3063
3064         if (ena_dev->mem_bar)
3065                 devm_iounmap(&pdev->dev, ena_dev->mem_bar);
3066
3067         devm_iounmap(&pdev->dev, ena_dev->reg_bar);
3068
3069         release_bars = pci_select_bars(pdev, IORESOURCE_MEM) & ENA_BAR_MASK;
3070         pci_release_selected_regions(pdev, release_bars);
3071 }
3072
3073 static int ena_calc_queue_size(struct pci_dev *pdev,
3074                                struct ena_com_dev *ena_dev,
3075                                u16 *max_tx_sgl_size,
3076                                u16 *max_rx_sgl_size,
3077                                struct ena_com_dev_get_features_ctx *get_feat_ctx)
3078 {
3079         u32 queue_size = ENA_DEFAULT_RING_SIZE;
3080
3081         queue_size = min_t(u32, queue_size,
3082                            get_feat_ctx->max_queues.max_cq_depth);
3083         queue_size = min_t(u32, queue_size,
3084                            get_feat_ctx->max_queues.max_sq_depth);
3085
3086         if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV)
3087                 queue_size = min_t(u32, queue_size,
3088                                    get_feat_ctx->max_queues.max_llq_depth);
3089
3090         queue_size = rounddown_pow_of_two(queue_size);
3091
3092         if (unlikely(!queue_size)) {
3093                 dev_err(&pdev->dev, "Invalid queue size\n");
3094                 return -EFAULT;
3095         }
3096
3097         *max_tx_sgl_size = min_t(u16, ENA_PKT_MAX_BUFS,
3098                                  get_feat_ctx->max_queues.max_packet_tx_descs);
3099         *max_rx_sgl_size = min_t(u16, ENA_PKT_MAX_BUFS,
3100                                  get_feat_ctx->max_queues.max_packet_rx_descs);
3101
3102         return queue_size;
3103 }
3104
3105 /* ena_probe - Device Initialization Routine
3106  * @pdev: PCI device information struct
3107  * @ent: entry in ena_pci_tbl
3108  *
3109  * Returns 0 on success, negative on failure
3110  *
3111  * ena_probe initializes an adapter identified by a pci_dev structure.
3112  * The OS initialization, configuring of the adapter private structure,
3113  * and a hardware reset occur.
3114  */
3115 static int ena_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
3116 {
3117         struct ena_com_dev_get_features_ctx get_feat_ctx;
3118         static int version_printed;
3119         struct net_device *netdev;
3120         struct ena_adapter *adapter;
3121         struct ena_com_dev *ena_dev = NULL;
3122         static int adapters_found;
3123         int io_queue_num, bars, rc;
3124         int queue_size;
3125         u16 tx_sgl_size = 0;
3126         u16 rx_sgl_size = 0;
3127         bool wd_state;
3128
3129         dev_dbg(&pdev->dev, "%s\n", __func__);
3130
3131         if (version_printed++ == 0)
3132                 dev_info(&pdev->dev, "%s", version);
3133
3134         rc = pci_enable_device_mem(pdev);
3135         if (rc) {
3136                 dev_err(&pdev->dev, "pci_enable_device_mem() failed!\n");
3137                 return rc;
3138         }
3139
3140         pci_set_master(pdev);
3141
3142         ena_dev = vzalloc(sizeof(*ena_dev));
3143         if (!ena_dev) {
3144                 rc = -ENOMEM;
3145                 goto err_disable_device;
3146         }
3147
3148         bars = pci_select_bars(pdev, IORESOURCE_MEM) & ENA_BAR_MASK;
3149         rc = pci_request_selected_regions(pdev, bars, DRV_MODULE_NAME);
3150         if (rc) {
3151                 dev_err(&pdev->dev, "pci_request_selected_regions failed %d\n",
3152                         rc);
3153                 goto err_free_ena_dev;
3154         }
3155
3156         ena_dev->reg_bar = devm_ioremap(&pdev->dev,
3157                                         pci_resource_start(pdev, ENA_REG_BAR),
3158                                         pci_resource_len(pdev, ENA_REG_BAR));
3159         if (!ena_dev->reg_bar) {
3160                 dev_err(&pdev->dev, "failed to remap regs bar\n");
3161                 rc = -EFAULT;
3162                 goto err_free_region;
3163         }
3164
3165         ena_dev->dmadev = &pdev->dev;
3166
3167         rc = ena_device_init(ena_dev, pdev, &get_feat_ctx, &wd_state);
3168         if (rc) {
3169                 dev_err(&pdev->dev, "ena device init failed\n");
3170                 if (rc == -ETIME)
3171                         rc = -EPROBE_DEFER;
3172                 goto err_free_region;
3173         }
3174
3175         ena_set_push_mode(pdev, ena_dev, &get_feat_ctx);
3176
3177         if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV) {
3178                 ena_dev->mem_bar = devm_ioremap_wc(&pdev->dev,
3179                                                    pci_resource_start(pdev, ENA_MEM_BAR),
3180                                                    pci_resource_len(pdev, ENA_MEM_BAR));
3181                 if (!ena_dev->mem_bar) {
3182                         rc = -EFAULT;
3183                         goto err_device_destroy;
3184                 }
3185         }
3186
3187         /* initial Tx interrupt delay, Assumes 1 usec granularity.
3188         * Updated during device initialization with the real granularity
3189         */
3190         ena_dev->intr_moder_tx_interval = ENA_INTR_INITIAL_TX_INTERVAL_USECS;
3191         io_queue_num = ena_calc_io_queue_num(pdev, ena_dev, &get_feat_ctx);
3192         queue_size = ena_calc_queue_size(pdev, ena_dev, &tx_sgl_size,
3193                                          &rx_sgl_size, &get_feat_ctx);
3194         if ((queue_size <= 0) || (io_queue_num <= 0)) {
3195                 rc = -EFAULT;
3196                 goto err_device_destroy;
3197         }
3198
3199         dev_info(&pdev->dev, "creating %d io queues. queue size: %d\n",
3200                  io_queue_num, queue_size);
3201
3202         /* dev zeroed in init_etherdev */
3203         netdev = alloc_etherdev_mq(sizeof(struct ena_adapter), io_queue_num);
3204         if (!netdev) {
3205                 dev_err(&pdev->dev, "alloc_etherdev_mq failed\n");
3206                 rc = -ENOMEM;
3207                 goto err_device_destroy;
3208         }
3209
3210         SET_NETDEV_DEV(netdev, &pdev->dev);
3211
3212         adapter = netdev_priv(netdev);
3213         pci_set_drvdata(pdev, adapter);
3214
3215         adapter->ena_dev = ena_dev;
3216         adapter->netdev = netdev;
3217         adapter->pdev = pdev;
3218
3219         ena_set_conf_feat_params(adapter, &get_feat_ctx);
3220
3221         adapter->msg_enable = netif_msg_init(debug, DEFAULT_MSG_ENABLE);
3222         adapter->reset_reason = ENA_REGS_RESET_NORMAL;
3223
3224         adapter->tx_ring_size = queue_size;
3225         adapter->rx_ring_size = queue_size;
3226
3227         adapter->max_tx_sgl_size = tx_sgl_size;
3228         adapter->max_rx_sgl_size = rx_sgl_size;
3229
3230         adapter->num_queues = io_queue_num;
3231         adapter->last_monitored_tx_qid = 0;
3232
3233         adapter->rx_copybreak = ENA_DEFAULT_RX_COPYBREAK;
3234         adapter->wd_state = wd_state;
3235
3236         snprintf(adapter->name, ENA_NAME_MAX_LEN, "ena_%d", adapters_found);
3237
3238         rc = ena_com_init_interrupt_moderation(adapter->ena_dev);
3239         if (rc) {
3240                 dev_err(&pdev->dev,
3241                         "Failed to query interrupt moderation feature\n");
3242                 goto err_netdev_destroy;
3243         }
3244         ena_init_io_rings(adapter);
3245
3246         netdev->netdev_ops = &ena_netdev_ops;
3247         netdev->watchdog_timeo = TX_TIMEOUT;
3248         ena_set_ethtool_ops(netdev);
3249
3250         netdev->priv_flags |= IFF_UNICAST_FLT;
3251
3252         u64_stats_init(&adapter->syncp);
3253
3254         rc = ena_enable_msix_and_set_admin_interrupts(adapter, io_queue_num);
3255         if (rc) {
3256                 dev_err(&pdev->dev,
3257                         "Failed to enable and set the admin interrupts\n");
3258                 goto err_worker_destroy;
3259         }
3260         rc = ena_rss_init_default(adapter);
3261         if (rc && (rc != -EOPNOTSUPP)) {
3262                 dev_err(&pdev->dev, "Cannot init RSS rc: %d\n", rc);
3263                 goto err_free_msix;
3264         }
3265
3266         ena_config_debug_area(adapter);
3267
3268         memcpy(adapter->netdev->perm_addr, adapter->mac_addr, netdev->addr_len);
3269
3270         netif_carrier_off(netdev);
3271
3272         rc = register_netdev(netdev);
3273         if (rc) {
3274                 dev_err(&pdev->dev, "Cannot register net device\n");
3275                 goto err_rss;
3276         }
3277
3278         INIT_WORK(&adapter->suspend_io_task, ena_device_io_suspend);
3279         INIT_WORK(&adapter->resume_io_task, ena_device_io_resume);
3280         INIT_WORK(&adapter->reset_task, ena_fw_reset_device);
3281
3282         adapter->last_keep_alive_jiffies = jiffies;
3283         adapter->keep_alive_timeout = ENA_DEVICE_KALIVE_TIMEOUT;
3284         adapter->missing_tx_completion_to = TX_TIMEOUT;
3285         adapter->missing_tx_completion_threshold = MAX_NUM_OF_TIMEOUTED_PACKETS;
3286
3287         ena_update_hints(adapter, &get_feat_ctx.hw_hints);
3288
3289         setup_timer(&adapter->timer_service, ena_timer_service,
3290                     (unsigned long)adapter);
3291         mod_timer(&adapter->timer_service, round_jiffies(jiffies + HZ));
3292
3293         dev_info(&pdev->dev, "%s found at mem %lx, mac addr %pM Queues %d\n",
3294                  DEVICE_NAME, (long)pci_resource_start(pdev, 0),
3295                  netdev->dev_addr, io_queue_num);
3296
3297         set_bit(ENA_FLAG_DEVICE_RUNNING, &adapter->flags);
3298
3299         adapters_found++;
3300
3301         return 0;
3302
3303 err_rss:
3304         ena_com_delete_debug_area(ena_dev);
3305         ena_com_rss_destroy(ena_dev);
3306 err_free_msix:
3307         ena_com_dev_reset(ena_dev, ENA_REGS_RESET_INIT_ERR);
3308         ena_free_mgmnt_irq(adapter);
3309         ena_disable_msix(adapter);
3310 err_worker_destroy:
3311         ena_com_destroy_interrupt_moderation(ena_dev);
3312         del_timer(&adapter->timer_service);
3313         cancel_work_sync(&adapter->suspend_io_task);
3314         cancel_work_sync(&adapter->resume_io_task);
3315 err_netdev_destroy:
3316         free_netdev(netdev);
3317 err_device_destroy:
3318         ena_com_delete_host_info(ena_dev);
3319         ena_com_admin_destroy(ena_dev);
3320 err_free_region:
3321         ena_release_bars(ena_dev, pdev);
3322 err_free_ena_dev:
3323         vfree(ena_dev);
3324 err_disable_device:
3325         pci_disable_device(pdev);
3326         return rc;
3327 }
3328
3329 /*****************************************************************************/
3330 static int ena_sriov_configure(struct pci_dev *dev, int numvfs)
3331 {
3332         int rc;
3333
3334         if (numvfs > 0) {
3335                 rc = pci_enable_sriov(dev, numvfs);
3336                 if (rc != 0) {
3337                         dev_err(&dev->dev,
3338                                 "pci_enable_sriov failed to enable: %d vfs with the error: %d\n",
3339                                 numvfs, rc);
3340                         return rc;
3341                 }
3342
3343                 return numvfs;
3344         }
3345
3346         if (numvfs == 0) {
3347                 pci_disable_sriov(dev);
3348                 return 0;
3349         }
3350
3351         return -EINVAL;
3352 }
3353
3354 /*****************************************************************************/
3355 /*****************************************************************************/
3356
3357 /* ena_remove - Device Removal Routine
3358  * @pdev: PCI device information struct
3359  *
3360  * ena_remove is called by the PCI subsystem to alert the driver
3361  * that it should release a PCI device.
3362  */
3363 static void ena_remove(struct pci_dev *pdev)
3364 {
3365         struct ena_adapter *adapter = pci_get_drvdata(pdev);
3366         struct ena_com_dev *ena_dev;
3367         struct net_device *netdev;
3368
3369         ena_dev = adapter->ena_dev;
3370         netdev = adapter->netdev;
3371
3372 #ifdef CONFIG_RFS_ACCEL
3373         if ((adapter->msix_vecs >= 1) && (netdev->rx_cpu_rmap)) {
3374                 free_irq_cpu_rmap(netdev->rx_cpu_rmap);
3375                 netdev->rx_cpu_rmap = NULL;
3376         }
3377 #endif /* CONFIG_RFS_ACCEL */
3378
3379         unregister_netdev(netdev);
3380         del_timer_sync(&adapter->timer_service);
3381
3382         cancel_work_sync(&adapter->reset_task);
3383
3384         cancel_work_sync(&adapter->suspend_io_task);
3385
3386         cancel_work_sync(&adapter->resume_io_task);
3387
3388         /* Reset the device only if the device is running. */
3389         if (test_bit(ENA_FLAG_DEVICE_RUNNING, &adapter->flags))
3390                 ena_com_dev_reset(ena_dev, adapter->reset_reason);
3391
3392         ena_free_mgmnt_irq(adapter);
3393
3394         ena_disable_msix(adapter);
3395
3396         free_netdev(netdev);
3397
3398         ena_com_mmio_reg_read_request_destroy(ena_dev);
3399
3400         ena_com_abort_admin_commands(ena_dev);
3401
3402         ena_com_wait_for_abort_completion(ena_dev);
3403
3404         ena_com_admin_destroy(ena_dev);
3405
3406         ena_com_rss_destroy(ena_dev);
3407
3408         ena_com_delete_debug_area(ena_dev);
3409
3410         ena_com_delete_host_info(ena_dev);
3411
3412         ena_release_bars(ena_dev, pdev);
3413
3414         pci_disable_device(pdev);
3415
3416         ena_com_destroy_interrupt_moderation(ena_dev);
3417
3418         vfree(ena_dev);
3419 }
3420
3421 static struct pci_driver ena_pci_driver = {
3422         .name           = DRV_MODULE_NAME,
3423         .id_table       = ena_pci_tbl,
3424         .probe          = ena_probe,
3425         .remove         = ena_remove,
3426         .sriov_configure = ena_sriov_configure,
3427 };
3428
3429 static int __init ena_init(void)
3430 {
3431         pr_info("%s", version);
3432
3433         ena_wq = create_singlethread_workqueue(DRV_MODULE_NAME);
3434         if (!ena_wq) {
3435                 pr_err("Failed to create workqueue\n");
3436                 return -ENOMEM;
3437         }
3438
3439         return pci_register_driver(&ena_pci_driver);
3440 }
3441
3442 static void __exit ena_cleanup(void)
3443 {
3444         pci_unregister_driver(&ena_pci_driver);
3445
3446         if (ena_wq) {
3447                 destroy_workqueue(ena_wq);
3448                 ena_wq = NULL;
3449         }
3450 }
3451
3452 /******************************************************************************
3453  ******************************** AENQ Handlers *******************************
3454  *****************************************************************************/
3455 /* ena_update_on_link_change:
3456  * Notify the network interface about the change in link status
3457  */
3458 static void ena_update_on_link_change(void *adapter_data,
3459                                       struct ena_admin_aenq_entry *aenq_e)
3460 {
3461         struct ena_adapter *adapter = (struct ena_adapter *)adapter_data;
3462         struct ena_admin_aenq_link_change_desc *aenq_desc =
3463                 (struct ena_admin_aenq_link_change_desc *)aenq_e;
3464         int status = aenq_desc->flags &
3465                 ENA_ADMIN_AENQ_LINK_CHANGE_DESC_LINK_STATUS_MASK;
3466
3467         if (status) {
3468                 netdev_dbg(adapter->netdev, "%s\n", __func__);
3469                 set_bit(ENA_FLAG_LINK_UP, &adapter->flags);
3470                 netif_carrier_on(adapter->netdev);
3471         } else {
3472                 clear_bit(ENA_FLAG_LINK_UP, &adapter->flags);
3473                 netif_carrier_off(adapter->netdev);
3474         }
3475 }
3476
3477 static void ena_keep_alive_wd(void *adapter_data,
3478                               struct ena_admin_aenq_entry *aenq_e)
3479 {
3480         struct ena_adapter *adapter = (struct ena_adapter *)adapter_data;
3481         struct ena_admin_aenq_keep_alive_desc *desc;
3482         u64 rx_drops;
3483
3484         desc = (struct ena_admin_aenq_keep_alive_desc *)aenq_e;
3485         adapter->last_keep_alive_jiffies = jiffies;
3486
3487         rx_drops = ((u64)desc->rx_drops_high << 32) | desc->rx_drops_low;
3488
3489         u64_stats_update_begin(&adapter->syncp);
3490         adapter->dev_stats.rx_drops = rx_drops;
3491         u64_stats_update_end(&adapter->syncp);
3492 }
3493
3494 static void ena_notification(void *adapter_data,
3495                              struct ena_admin_aenq_entry *aenq_e)
3496 {
3497         struct ena_adapter *adapter = (struct ena_adapter *)adapter_data;
3498         struct ena_admin_ena_hw_hints *hints;
3499
3500         WARN(aenq_e->aenq_common_desc.group != ENA_ADMIN_NOTIFICATION,
3501              "Invalid group(%x) expected %x\n",
3502              aenq_e->aenq_common_desc.group,
3503              ENA_ADMIN_NOTIFICATION);
3504
3505         switch (aenq_e->aenq_common_desc.syndrom) {
3506         case ENA_ADMIN_SUSPEND:
3507                 /* Suspend just the IO queues.
3508                  * We deliberately don't suspend admin so the timer and
3509                  * the keep_alive events should remain.
3510                  */
3511                 queue_work(ena_wq, &adapter->suspend_io_task);
3512                 break;
3513         case ENA_ADMIN_RESUME:
3514                 queue_work(ena_wq, &adapter->resume_io_task);
3515                 break;
3516         case ENA_ADMIN_UPDATE_HINTS:
3517                 hints = (struct ena_admin_ena_hw_hints *)
3518                         (&aenq_e->inline_data_w4);
3519                 ena_update_hints(adapter, hints);
3520                 break;
3521         default:
3522                 netif_err(adapter, drv, adapter->netdev,
3523                           "Invalid aenq notification link state %d\n",
3524                           aenq_e->aenq_common_desc.syndrom);
3525         }
3526 }
3527
3528 /* This handler will called for unknown event group or unimplemented handlers*/
3529 static void unimplemented_aenq_handler(void *data,
3530                                        struct ena_admin_aenq_entry *aenq_e)
3531 {
3532         struct ena_adapter *adapter = (struct ena_adapter *)data;
3533
3534         netif_err(adapter, drv, adapter->netdev,
3535                   "Unknown event was received or event with unimplemented handler\n");
3536 }
3537
3538 static struct ena_aenq_handlers aenq_handlers = {
3539         .handlers = {
3540                 [ENA_ADMIN_LINK_CHANGE] = ena_update_on_link_change,
3541                 [ENA_ADMIN_NOTIFICATION] = ena_notification,
3542                 [ENA_ADMIN_KEEP_ALIVE] = ena_keep_alive_wd,
3543         },
3544         .unimplemented_handler = unimplemented_aenq_handler
3545 };
3546
3547 module_init(ena_init);
3548 module_exit(ena_cleanup);