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

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