sys/dev/ena/ena.c

   1 /*-
   2  * SPDX-License-Identifier: BSD-2-Clause
   3  *
   4  * Copyright (c) 2015-2021 Amazon.com, Inc. or its affiliates.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  *
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  *
  14  * 2. Redistributions in binary form must reproduce the above copyright
  15  *    notice, this list of conditions and the following disclaimer in the
  16  *    documentation and/or other materials provided with the distribution.
  17  *
  18  * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  19  * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  20  * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  21  * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  22  * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  23  * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  24  * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  25  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  26  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  27  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  28  * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  29  */
  30 #include <sys/cdefs.h>
  31 #include "opt_rss.h"
  32
  33 #include <sys/param.h>
  34 #include <sys/systm.h>
  35 #include <sys/bus.h>
  36 #include <sys/endian.h>
  37 #include <sys/eventhandler.h>
  38 #include <sys/kernel.h>
  39 #include <sys/kthread.h>
  40 #include <sys/malloc.h>
  41 #include <sys/mbuf.h>
  42 #include <sys/module.h>
  43 #include <sys/rman.h>
  44 #include <sys/smp.h>
  45 #include <sys/socket.h>
  46 #include <sys/sockio.h>
  47 #include <sys/sysctl.h>
  48 #include <sys/taskqueue.h>
  49 #include <sys/time.h>
  50
  51 #include <vm/vm.h>
  52 #include <vm/pmap.h>
  53
  54 #include <machine/atomic.h>
  55 #include <machine/bus.h>
  56 #include <machine/in_cksum.h>
  57 #include <machine/resource.h>
  58
  59 #include <dev/pci/pcireg.h>
  60 #include <dev/pci/pcivar.h>
  61
  62 #include <net/bpf.h>
  63 #include <net/ethernet.h>
  64 #include <net/if.h>
  65 #include <net/if_arp.h>
  66 #include <net/if_dl.h>
  67 #include <net/if_media.h>
  68 #include <net/if_types.h>
  69 #include <net/if_var.h>
  70 #include <net/if_vlan_var.h>
  71 #include <netinet/in.h>
  72 #include <netinet/in_systm.h>
  73 #include <netinet/if_ether.h>
  74 #include <netinet/ip.h>
  75 #include <netinet/ip6.h>
  76 #include <netinet/tcp.h>
  77 #include <netinet/udp.h>
  78
  79 #include "ena.h"
  80 #include "ena_datapath.h"
  81 #include "ena_rss.h"
  82 #include "ena_sysctl.h"
  83
  84 #ifdef DEV_NETMAP
  85 #include "ena_netmap.h"
  86 #endif /* DEV_NETMAP */
  87
  88 /*********************************************************
  89  *  Function prototypes
  90  *********************************************************/
  91 static int ena_probe(device_t);
  92 static void ena_intr_msix_mgmnt(void *);
  93 static void ena_free_pci_resources(struct ena_adapter *);
  94 static int ena_change_mtu(if_t, int);
  95 static inline void ena_alloc_counters(counter_u64_t *, int);
  96 static inline void ena_free_counters(counter_u64_t *, int);
  97 static inline void ena_reset_counters(counter_u64_t *, int);
  98 static void ena_init_io_rings_common(struct ena_adapter *, struct ena_ring *,
  99     uint16_t);
 100 static void ena_init_io_rings_basic(struct ena_adapter *);
 101 static void ena_init_io_rings_advanced(struct ena_adapter *);
 102 static void ena_init_io_rings(struct ena_adapter *);
 103 static void ena_free_io_ring_resources(struct ena_adapter *, unsigned int);
 104 static void ena_free_all_io_rings_resources(struct ena_adapter *);
 105 static int ena_setup_tx_dma_tag(struct ena_adapter *);
 106 static int ena_free_tx_dma_tag(struct ena_adapter *);
 107 static int ena_setup_rx_dma_tag(struct ena_adapter *);
 108 static int ena_free_rx_dma_tag(struct ena_adapter *);
 109 static void ena_release_all_tx_dmamap(struct ena_ring *);
 110 static int ena_setup_tx_resources(struct ena_adapter *, int);
 111 static void ena_free_tx_resources(struct ena_adapter *, int);
 112 static int ena_setup_all_tx_resources(struct ena_adapter *);
 113 static void ena_free_all_tx_resources(struct ena_adapter *);
 114 static int ena_setup_rx_resources(struct ena_adapter *, unsigned int);
 115 static void ena_free_rx_resources(struct ena_adapter *, unsigned int);
 116 static int ena_setup_all_rx_resources(struct ena_adapter *);
 117 static void ena_free_all_rx_resources(struct ena_adapter *);
 118 static inline int ena_alloc_rx_mbuf(struct ena_adapter *, struct ena_ring *,
 119     struct ena_rx_buffer *);
 120 static void ena_free_rx_mbuf(struct ena_adapter *, struct ena_ring *,
 121     struct ena_rx_buffer *);
 122 static void ena_free_rx_bufs(struct ena_adapter *, unsigned int);
 123 static void ena_refill_all_rx_bufs(struct ena_adapter *);
 124 static void ena_free_all_rx_bufs(struct ena_adapter *);
 125 static void ena_free_tx_bufs(struct ena_adapter *, unsigned int);
 126 static void ena_free_all_tx_bufs(struct ena_adapter *);
 127 static void ena_destroy_all_tx_queues(struct ena_adapter *);
 128 static void ena_destroy_all_rx_queues(struct ena_adapter *);
 129 static void ena_destroy_all_io_queues(struct ena_adapter *);
 130 static int ena_create_io_queues(struct ena_adapter *);
 131 static int ena_handle_msix(void *);
 132 static int ena_enable_msix(struct ena_adapter *);
 133 static void ena_setup_mgmnt_intr(struct ena_adapter *);
 134 static int ena_setup_io_intr(struct ena_adapter *);
 135 static int ena_request_mgmnt_irq(struct ena_adapter *);
 136 static int ena_request_io_irq(struct ena_adapter *);
 137 static void ena_free_mgmnt_irq(struct ena_adapter *);
 138 static void ena_free_io_irq(struct ena_adapter *);
 139 static void ena_free_irqs(struct ena_adapter *);
 140 static void ena_disable_msix(struct ena_adapter *);
 141 static void ena_unmask_all_io_irqs(struct ena_adapter *);
 142 static int ena_up_complete(struct ena_adapter *);
 143 static uint64_t ena_get_counter(if_t, ift_counter);
 144 static int ena_media_change(if_t);
 145 static void ena_media_status(if_t, struct ifmediareq *);
 146 static void ena_init(void *);
 147 static int ena_ioctl(if_t, u_long, caddr_t);
 148 static int ena_get_dev_offloads(struct ena_com_dev_get_features_ctx *);
 149 static void ena_update_host_info(struct ena_admin_host_info *, if_t);
 150 static void ena_update_hwassist(struct ena_adapter *);
 151 static int ena_setup_ifnet(device_t, struct ena_adapter *,
 152     struct ena_com_dev_get_features_ctx *);
 153 static int ena_enable_wc(device_t, struct resource *);
 154 static int ena_set_queues_placement_policy(device_t, struct ena_com_dev *,
 155     struct ena_admin_feature_llq_desc *, struct ena_llq_configurations *);
 156 static int ena_map_llq_mem_bar(device_t, struct ena_com_dev *);
 157 static uint32_t ena_calc_max_io_queue_num(device_t, struct ena_com_dev *,
 158     struct ena_com_dev_get_features_ctx *);
 159 static int ena_calc_io_queue_size(struct ena_calc_queue_size_ctx *);
 160 static void ena_config_host_info(struct ena_com_dev *, device_t);
 161 static int ena_attach(device_t);
 162 static int ena_detach(device_t);
 163 static int ena_device_init(struct ena_adapter *, device_t,
 164     struct ena_com_dev_get_features_ctx *, int *);
 165 static int ena_enable_msix_and_set_admin_interrupts(struct ena_adapter *);
 166 static void ena_update_on_link_change(void *, struct ena_admin_aenq_entry *);
 167 static void unimplemented_aenq_handler(void *, struct ena_admin_aenq_entry *);
 168 static int ena_copy_eni_metrics(struct ena_adapter *);
 169 static void ena_timer_service(void *);
 170
 171 static char ena_version[] = ENA_DEVICE_NAME ENA_DRV_MODULE_NAME
 172     " v" ENA_DRV_MODULE_VERSION;
 173
 174 static ena_vendor_info_t ena_vendor_info_array[] = {
 175         { PCI_VENDOR_ID_AMAZON, PCI_DEV_ID_ENA_PF, 0 },
 176         { PCI_VENDOR_ID_AMAZON, PCI_DEV_ID_ENA_PF_RSERV0, 0 },
 177         { PCI_VENDOR_ID_AMAZON, PCI_DEV_ID_ENA_VF, 0 },
 178         { PCI_VENDOR_ID_AMAZON, PCI_DEV_ID_ENA_VF_RSERV0, 0 },
 179         /* Last entry */
 180         { 0, 0, 0 }
 181 };
 182
 183 struct sx ena_global_lock;
 184
 185 /*
 186  * Contains pointers to event handlers, e.g. link state chage.
 187  */
 188 static struct ena_aenq_handlers aenq_handlers;
 189
 190 void
 191 ena_dmamap_callback(void *arg, bus_dma_segment_t *segs, int nseg, int error)
 192 {
 193         if (error != 0)
 194                 return;
 195         *(bus_addr_t *)arg = segs[0].ds_addr;
 196 }
 197
 198 int
 199 ena_dma_alloc(device_t dmadev, bus_size_t size, ena_mem_handle_t *dma,
 200     int mapflags, bus_size_t alignment, int domain)
 201 {
 202         struct ena_adapter *adapter = device_get_softc(dmadev);
 203         device_t pdev = adapter->pdev;
 204         uint32_t maxsize;
 205         uint64_t dma_space_addr;
 206         int error;
 207
 208         maxsize = ((size - 1) / PAGE_SIZE + 1) * PAGE_SIZE;
 209
 210         dma_space_addr = ENA_DMA_BIT_MASK(adapter->dma_width);
 211         if (unlikely(dma_space_addr == 0))
 212                 dma_space_addr = BUS_SPACE_MAXADDR;
 213
 214         error = bus_dma_tag_create(bus_get_dma_tag(dmadev), /* parent */
 215             alignment, 0,      /* alignment, bounds             */
 216             dma_space_addr,    /* lowaddr of exclusion window   */
 217             BUS_SPACE_MAXADDR, /* highaddr of exclusion window  */
 218             NULL, NULL,        /* filter, filterarg             */
 219             maxsize,           /* maxsize                       */
 220             1,                 /* nsegments                     */
 221             maxsize,           /* maxsegsize                    */
 222             BUS_DMA_ALLOCNOW,  /* flags                         */
 223             NULL,              /* lockfunc                      */
 224             NULL,              /* lockarg                       */
 225             &dma->tag);
 226         if (unlikely(error != 0)) {
 227                 ena_log(pdev, ERR, "bus_dma_tag_create failed: %d\n", error);
 228                 goto fail_tag;
 229         }
 230
 231         error = bus_dma_tag_set_domain(dma->tag, domain);
 232         if (unlikely(error != 0)) {
 233                 ena_log(pdev, ERR, "bus_dma_tag_set_domain failed: %d\n",
 234                     error);
 235                 goto fail_map_create;
 236         }
 237
 238         error = bus_dmamem_alloc(dma->tag, (void **)&dma->vaddr,
 239             BUS_DMA_COHERENT | BUS_DMA_ZERO, &dma->map);
 240         if (unlikely(error != 0)) {
 241                 ena_log(pdev, ERR, "bus_dmamem_alloc(%ju) failed: %d\n",
 242                     (uintmax_t)size, error);
 243                 goto fail_map_create;
 244         }
 245
 246         dma->paddr = 0;
 247         error = bus_dmamap_load(dma->tag, dma->map, dma->vaddr, size,
 248             ena_dmamap_callback, &dma->paddr, mapflags);
 249         if (unlikely((error != 0) || (dma->paddr == 0))) {
 250                 ena_log(pdev, ERR, "bus_dmamap_load failed: %d\n", error);
 251                 goto fail_map_load;
 252         }
 253
 254         bus_dmamap_sync(dma->tag, dma->map,
 255             BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
 256
 257         return (0);
 258
 259 fail_map_load:
 260         bus_dmamem_free(dma->tag, dma->vaddr, dma->map);
 261 fail_map_create:
 262         bus_dma_tag_destroy(dma->tag);
 263 fail_tag:
 264         dma->tag = NULL;
 265         dma->vaddr = NULL;
 266         dma->paddr = 0;
 267
 268         return (error);
 269 }
 270
 271 static void
 272 ena_free_pci_resources(struct ena_adapter *adapter)
 273 {
 274         device_t pdev = adapter->pdev;
 275
 276         if (adapter->memory != NULL) {
 277                 bus_release_resource(pdev, SYS_RES_MEMORY,
 278                     PCIR_BAR(ENA_MEM_BAR), adapter->memory);
 279         }
 280
 281         if (adapter->registers != NULL) {
 282                 bus_release_resource(pdev, SYS_RES_MEMORY,
 283                     PCIR_BAR(ENA_REG_BAR), adapter->registers);
 284         }
 285
 286         if (adapter->msix != NULL) {
 287                 bus_release_resource(pdev, SYS_RES_MEMORY, adapter->msix_rid,
 288                     adapter->msix);
 289         }
 290 }
 291
 292 static int
 293 ena_probe(device_t dev)
 294 {
 295         ena_vendor_info_t *ent;
 296         uint16_t pci_vendor_id = 0;
 297         uint16_t pci_device_id = 0;
 298
 299         pci_vendor_id = pci_get_vendor(dev);
 300         pci_device_id = pci_get_device(dev);
 301
 302         ent = ena_vendor_info_array;
 303         while (ent->vendor_id != 0) {
 304                 if ((pci_vendor_id == ent->vendor_id) &&
 305                     (pci_device_id == ent->device_id)) {
 306                         ena_log_raw(DBG, "vendor=%x device=%x\n", pci_vendor_id,
 307                             pci_device_id);
 308
 309                         device_set_desc(dev, ENA_DEVICE_DESC);
 310                         return (BUS_PROBE_DEFAULT);
 311                 }
 312
 313                 ent++;
 314         }
 315
 316         return (ENXIO);
 317 }
 318
 319 static int
 320 ena_change_mtu(if_t ifp, int new_mtu)
 321 {
 322         struct ena_adapter *adapter = if_getsoftc(ifp);
 323         device_t pdev = adapter->pdev;
 324         int rc;
 325
 326         if ((new_mtu > adapter->max_mtu) || (new_mtu < ENA_MIN_MTU)) {
 327                 ena_log(pdev, ERR, "Invalid MTU setting. new_mtu: %d max mtu: %d min mtu: %d\n",
 328                     new_mtu, adapter->max_mtu, ENA_MIN_MTU);
 329                 return (EINVAL);
 330         }
 331
 332         rc = ena_com_set_dev_mtu(adapter->ena_dev, new_mtu);
 333         if (likely(rc == 0)) {
 334                 ena_log(pdev, DBG, "set MTU to %d\n", new_mtu);
 335                 if_setmtu(ifp, new_mtu);
 336         } else {
 337                 ena_log(pdev, ERR, "Failed to set MTU to %d\n", new_mtu);
 338         }
 339
 340         return (rc);
 341 }
 342
 343 static inline void
 344 ena_alloc_counters(counter_u64_t *begin, int size)
 345 {
 346         counter_u64_t *end = (counter_u64_t *)((char *)begin + size);
 347
 348         for (; begin < end; ++begin)
 349                 *begin = counter_u64_alloc(M_WAITOK);
 350 }
 351
 352 static inline void
 353 ena_free_counters(counter_u64_t *begin, int size)
 354 {
 355         counter_u64_t *end = (counter_u64_t *)((char *)begin + size);
 356
 357         for (; begin < end; ++begin)
 358                 counter_u64_free(*begin);
 359 }
 360
 361 static inline void
 362 ena_reset_counters(counter_u64_t *begin, int size)
 363 {
 364         counter_u64_t *end = (counter_u64_t *)((char *)begin + size);
 365
 366         for (; begin < end; ++begin)
 367                 counter_u64_zero(*begin);
 368 }
 369
 370 static void
 371 ena_init_io_rings_common(struct ena_adapter *adapter, struct ena_ring *ring,
 372     uint16_t qid)
 373 {
 374         ring->qid = qid;
 375         ring->adapter = adapter;
 376         ring->ena_dev = adapter->ena_dev;
 377         atomic_store_8(&ring->first_interrupt, 0);
 378         ring->no_interrupt_event_cnt = 0;
 379 }
 380
 381 static void
 382 ena_init_io_rings_basic(struct ena_adapter *adapter)
 383 {
 384         struct ena_com_dev *ena_dev;
 385         struct ena_ring *txr, *rxr;
 386         struct ena_que *que;
 387         int i;
 388
 389         ena_dev = adapter->ena_dev;
 390
 391         for (i = 0; i < adapter->num_io_queues; i++) {
 392                 txr = &adapter->tx_ring[i];
 393                 rxr = &adapter->rx_ring[i];
 394
 395                 /* TX/RX common ring state */
 396                 ena_init_io_rings_common(adapter, txr, i);
 397                 ena_init_io_rings_common(adapter, rxr, i);
 398
 399                 /* TX specific ring state */
 400                 txr->tx_max_header_size = ena_dev->tx_max_header_size;
 401                 txr->tx_mem_queue_type = ena_dev->tx_mem_queue_type;
 402
 403                 que = &adapter->que[i];
 404                 que->adapter = adapter;
 405                 que->id = i;
 406                 que->tx_ring = txr;
 407                 que->rx_ring = rxr;
 408
 409                 txr->que = que;
 410                 rxr->que = que;
 411
 412                 rxr->empty_rx_queue = 0;
 413                 rxr->rx_mbuf_sz = ena_mbuf_sz;
 414         }
 415 }
 416
 417 static void
 418 ena_init_io_rings_advanced(struct ena_adapter *adapter)
 419 {
 420         struct ena_ring *txr, *rxr;
 421         int i;
 422
 423         for (i = 0; i < adapter->num_io_queues; i++) {
 424                 txr = &adapter->tx_ring[i];
 425                 rxr = &adapter->rx_ring[i];
 426
 427                 /* Allocate a buf ring */
 428                 txr->buf_ring_size = adapter->buf_ring_size;
 429                 txr->br = buf_ring_alloc(txr->buf_ring_size, M_DEVBUF, M_WAITOK,
 430                     &txr->ring_mtx);
 431
 432                 /* Allocate Tx statistics. */
 433                 ena_alloc_counters((counter_u64_t *)&txr->tx_stats,
 434                     sizeof(txr->tx_stats));
 435                 txr->tx_last_cleanup_ticks = ticks;
 436
 437                 /* Allocate Rx statistics. */
 438                 ena_alloc_counters((counter_u64_t *)&rxr->rx_stats,
 439                     sizeof(rxr->rx_stats));
 440
 441                 /* Initialize locks */
 442                 snprintf(txr->mtx_name, nitems(txr->mtx_name), "%s:tx(%d)",
 443                     device_get_nameunit(adapter->pdev), i);
 444                 snprintf(rxr->mtx_name, nitems(rxr->mtx_name), "%s:rx(%d)",
 445                     device_get_nameunit(adapter->pdev), i);
 446
 447                 mtx_init(&txr->ring_mtx, txr->mtx_name, NULL, MTX_DEF);
 448         }
 449 }
 450
 451 static void
 452 ena_init_io_rings(struct ena_adapter *adapter)
 453 {
 454         /*
 455          * IO rings initialization can be divided into the 2 steps:
 456          *   1. Initialize variables and fields with initial values and copy
 457          *      them from adapter/ena_dev (basic)
 458          *   2. Allocate mutex, counters and buf_ring (advanced)
 459          */
 460         ena_init_io_rings_basic(adapter);
 461         ena_init_io_rings_advanced(adapter);
 462 }
 463
 464 static void
 465 ena_free_io_ring_resources(struct ena_adapter *adapter, unsigned int qid)
 466 {
 467         struct ena_ring *txr = &adapter->tx_ring[qid];
 468         struct ena_ring *rxr = &adapter->rx_ring[qid];
 469
 470         ena_free_counters((counter_u64_t *)&txr->tx_stats,
 471             sizeof(txr->tx_stats));
 472         ena_free_counters((counter_u64_t *)&rxr->rx_stats,
 473             sizeof(rxr->rx_stats));
 474
 475         ENA_RING_MTX_LOCK(txr);
 476         drbr_free(txr->br, M_DEVBUF);
 477         ENA_RING_MTX_UNLOCK(txr);
 478
 479         mtx_destroy(&txr->ring_mtx);
 480 }
 481
 482 static void
 483 ena_free_all_io_rings_resources(struct ena_adapter *adapter)
 484 {
 485         int i;
 486
 487         for (i = 0; i < adapter->num_io_queues; i++)
 488                 ena_free_io_ring_resources(adapter, i);
 489 }
 490
 491 static int
 492 ena_setup_tx_dma_tag(struct ena_adapter *adapter)
 493 {
 494         int ret;
 495
 496         /* Create DMA tag for Tx buffers */
 497         ret = bus_dma_tag_create(bus_get_dma_tag(adapter->pdev),
 498             1, 0,                                 /* alignment, bounds       */
 499             ENA_DMA_BIT_MASK(adapter->dma_width), /* lowaddr of excl window  */
 500             BUS_SPACE_MAXADDR,                    /* highaddr of excl window */
 501             NULL, NULL,                           /* filter, filterarg       */
 502             ENA_TSO_MAXSIZE,                      /* maxsize                 */
 503             adapter->max_tx_sgl_size - 1,         /* nsegments               */
 504             ENA_TSO_MAXSIZE,                      /* maxsegsize              */
 505             0,                                    /* flags                   */
 506             NULL,                                 /* lockfunc                */
 507             NULL,                                 /* lockfuncarg             */
 508             &adapter->tx_buf_tag);
 509
 510         return (ret);
 511 }
 512
 513 static int
 514 ena_free_tx_dma_tag(struct ena_adapter *adapter)
 515 {
 516         int ret;
 517
 518         ret = bus_dma_tag_destroy(adapter->tx_buf_tag);
 519
 520         if (likely(ret == 0))
 521                 adapter->tx_buf_tag = NULL;
 522
 523         return (ret);
 524 }
 525
 526 static int
 527 ena_setup_rx_dma_tag(struct ena_adapter *adapter)
 528 {
 529         int ret;
 530
 531         /* Create DMA tag for Rx buffers*/
 532         ret = bus_dma_tag_create(bus_get_dma_tag(adapter->pdev), /* parent   */
 533             1, 0,                                 /* alignment, bounds       */
 534             ENA_DMA_BIT_MASK(adapter->dma_width), /* lowaddr of excl window  */
 535             BUS_SPACE_MAXADDR,                    /* highaddr of excl window */
 536             NULL, NULL,                           /* filter, filterarg       */
 537             ena_mbuf_sz,                          /* maxsize                 */
 538             adapter->max_rx_sgl_size,             /* nsegments               */
 539             ena_mbuf_sz,                          /* maxsegsize              */
 540             0,                                    /* flags                   */
 541             NULL,                                 /* lockfunc                */
 542             NULL,                                 /* lockarg                 */
 543             &adapter->rx_buf_tag);
 544
 545         return (ret);
 546 }
 547
 548 static int
 549 ena_free_rx_dma_tag(struct ena_adapter *adapter)
 550 {
 551         int ret;
 552
 553         ret = bus_dma_tag_destroy(adapter->rx_buf_tag);
 554
 555         if (likely(ret == 0))
 556                 adapter->rx_buf_tag = NULL;
 557
 558         return (ret);
 559 }
 560
 561 static void
 562 ena_release_all_tx_dmamap(struct ena_ring *tx_ring)
 563 {
 564         struct ena_adapter *adapter = tx_ring->adapter;
 565         struct ena_tx_buffer *tx_info;
 566         bus_dma_tag_t tx_tag = adapter->tx_buf_tag;
 567         int i;
 568 #ifdef DEV_NETMAP
 569         struct ena_netmap_tx_info *nm_info;
 570         int j;
 571 #endif /* DEV_NETMAP */
 572
 573         for (i = 0; i < tx_ring->ring_size; ++i) {
 574                 tx_info = &tx_ring->tx_buffer_info[i];
 575 #ifdef DEV_NETMAP
 576                 if (if_getcapenable(adapter->ifp) & IFCAP_NETMAP) {
 577                         nm_info = &tx_info->nm_info;
 578                         for (j = 0; j < ENA_PKT_MAX_BUFS; ++j) {
 579                                 if (nm_info->map_seg[j] != NULL) {
 580                                         bus_dmamap_destroy(tx_tag,
 581                                             nm_info->map_seg[j]);
 582                                         nm_info->map_seg[j] = NULL;
 583                                 }
 584                         }
 585                 }
 586 #endif /* DEV_NETMAP */
 587                 if (tx_info->dmamap != NULL) {
 588                         bus_dmamap_destroy(tx_tag, tx_info->dmamap);
 589                         tx_info->dmamap = NULL;
 590                 }
 591         }
 592 }
 593
 594 /**
 595  * ena_setup_tx_resources - allocate Tx resources (Descriptors)
 596  * @adapter: network interface device structure
 597  * @qid: queue index
 598  *
 599  * Returns 0 on success, otherwise on failure.
 600  **/
 601 static int
 602 ena_setup_tx_resources(struct ena_adapter *adapter, int qid)
 603 {
 604         device_t pdev = adapter->pdev;
 605         char thread_name[MAXCOMLEN + 1];
 606         struct ena_que *que = &adapter->que[qid];
 607         struct ena_ring *tx_ring = que->tx_ring;
 608         cpuset_t *cpu_mask = NULL;
 609         int size, i, err;
 610 #ifdef DEV_NETMAP
 611         bus_dmamap_t *map;
 612         int j;
 613
 614         ena_netmap_reset_tx_ring(adapter, qid);
 615 #endif /* DEV_NETMAP */
 616
 617         size = sizeof(struct ena_tx_buffer) * tx_ring->ring_size;
 618
 619         tx_ring->tx_buffer_info = malloc(size, M_DEVBUF, M_NOWAIT | M_ZERO);
 620         if (unlikely(tx_ring->tx_buffer_info == NULL))
 621                 return (ENOMEM);
 622
 623         size = sizeof(uint16_t) * tx_ring->ring_size;
 624         tx_ring->free_tx_ids = malloc(size, M_DEVBUF, M_NOWAIT | M_ZERO);
 625         if (unlikely(tx_ring->free_tx_ids == NULL))
 626                 goto err_buf_info_free;
 627
 628         size = tx_ring->tx_max_header_size;
 629         tx_ring->push_buf_intermediate_buf = malloc(size, M_DEVBUF,
 630             M_NOWAIT | M_ZERO);
 631         if (unlikely(tx_ring->push_buf_intermediate_buf == NULL))
 632                 goto err_tx_ids_free;
 633
 634         /* Req id stack for TX OOO completions */
 635         for (i = 0; i < tx_ring->ring_size; i++)
 636                 tx_ring->free_tx_ids[i] = i;
 637
 638         /* Reset TX statistics. */
 639         ena_reset_counters((counter_u64_t *)&tx_ring->tx_stats,
 640             sizeof(tx_ring->tx_stats));
 641
 642         tx_ring->next_to_use = 0;
 643         tx_ring->next_to_clean = 0;
 644         tx_ring->acum_pkts = 0;
 645
 646         /* Make sure that drbr is empty */
 647         ENA_RING_MTX_LOCK(tx_ring);
 648         drbr_flush(adapter->ifp, tx_ring->br);
 649         ENA_RING_MTX_UNLOCK(tx_ring);
 650
 651         /* ... and create the buffer DMA maps */
 652         for (i = 0; i < tx_ring->ring_size; i++) {
 653                 err = bus_dmamap_create(adapter->tx_buf_tag, 0,
 654                     &tx_ring->tx_buffer_info[i].dmamap);
 655                 if (unlikely(err != 0)) {
 656                         ena_log(pdev, ERR,
 657                             "Unable to create Tx DMA map for buffer %d\n", i);
 658                         goto err_map_release;
 659                 }
 660
 661 #ifdef DEV_NETMAP
 662                 if (if_getcapenable(adapter->ifp) & IFCAP_NETMAP) {
 663                         map = tx_ring->tx_buffer_info[i].nm_info.map_seg;
 664                         for (j = 0; j < ENA_PKT_MAX_BUFS; j++) {
 665                                 err = bus_dmamap_create(adapter->tx_buf_tag, 0,
 666                                     &map[j]);
 667                                 if (unlikely(err != 0)) {
 668                                         ena_log(pdev, ERR,
 669                                             "Unable to create Tx DMA for buffer %d %d\n",
 670                                             i, j);
 671                                         goto err_map_release;
 672                                 }
 673                         }
 674                 }
 675 #endif /* DEV_NETMAP */
 676         }
 677
 678         /* Allocate taskqueues */
 679         TASK_INIT(&tx_ring->enqueue_task, 0, ena_deferred_mq_start, tx_ring);
 680         tx_ring->enqueue_tq = taskqueue_create_fast("ena_tx_enque", M_NOWAIT,
 681             taskqueue_thread_enqueue, &tx_ring->enqueue_tq);
 682         if (unlikely(tx_ring->enqueue_tq == NULL)) {
 683                 ena_log(pdev, ERR,
 684                     "Unable to create taskqueue for enqueue task\n");
 685                 i = tx_ring->ring_size;
 686                 goto err_map_release;
 687         }
 688
 689         tx_ring->running = true;
 690
 691 #ifdef RSS
 692         cpu_mask = &que->cpu_mask;
 693         snprintf(thread_name, sizeof(thread_name), "%s txeq %d",
 694             device_get_nameunit(adapter->pdev), que->cpu);
 695 #else
 696         snprintf(thread_name, sizeof(thread_name), "%s txeq %d",
 697             device_get_nameunit(adapter->pdev), que->id);
 698 #endif
 699         taskqueue_start_threads_cpuset(&tx_ring->enqueue_tq, 1, PI_NET,
 700             cpu_mask, "%s", thread_name);
 701
 702         return (0);
 703
 704 err_map_release:
 705         ena_release_all_tx_dmamap(tx_ring);
 706 err_tx_ids_free:
 707         free(tx_ring->free_tx_ids, M_DEVBUF);
 708         tx_ring->free_tx_ids = NULL;
 709 err_buf_info_free:
 710         free(tx_ring->tx_buffer_info, M_DEVBUF);
 711         tx_ring->tx_buffer_info = NULL;
 712
 713         return (ENOMEM);
 714 }
 715
 716 /**
 717  * ena_free_tx_resources - Free Tx Resources per Queue
 718  * @adapter: network interface device structure
 719  * @qid: queue index
 720  *
 721  * Free all transmit software resources
 722  **/
 723 static void
 724 ena_free_tx_resources(struct ena_adapter *adapter, int qid)
 725 {
 726         struct ena_ring *tx_ring = &adapter->tx_ring[qid];
 727 #ifdef DEV_NETMAP
 728         struct ena_netmap_tx_info *nm_info;
 729         int j;
 730 #endif /* DEV_NETMAP */
 731
 732         while (taskqueue_cancel(tx_ring->enqueue_tq, &tx_ring->enqueue_task, NULL))
 733                 taskqueue_drain(tx_ring->enqueue_tq, &tx_ring->enqueue_task);
 734
 735         taskqueue_free(tx_ring->enqueue_tq);
 736
 737         ENA_RING_MTX_LOCK(tx_ring);
 738         /* Flush buffer ring, */
 739         drbr_flush(adapter->ifp, tx_ring->br);
 740
 741         /* Free buffer DMA maps, */
 742         for (int i = 0; i < tx_ring->ring_size; i++) {
 743                 bus_dmamap_sync(adapter->tx_buf_tag,
 744                     tx_ring->tx_buffer_info[i].dmamap, BUS_DMASYNC_POSTWRITE);
 745                 bus_dmamap_unload(adapter->tx_buf_tag,
 746                     tx_ring->tx_buffer_info[i].dmamap);
 747                 bus_dmamap_destroy(adapter->tx_buf_tag,
 748                     tx_ring->tx_buffer_info[i].dmamap);
 749
 750 #ifdef DEV_NETMAP
 751                 if (if_getcapenable(adapter->ifp) & IFCAP_NETMAP) {
 752                         nm_info = &tx_ring->tx_buffer_info[i].nm_info;
 753                         for (j = 0; j < ENA_PKT_MAX_BUFS; j++) {
 754                                 if (nm_info->socket_buf_idx[j] != 0) {
 755                                         bus_dmamap_sync(adapter->tx_buf_tag,
 756                                             nm_info->map_seg[j],
 757                                             BUS_DMASYNC_POSTWRITE);
 758                                         ena_netmap_unload(adapter,
 759                                             nm_info->map_seg[j]);
 760                                 }
 761                                 bus_dmamap_destroy(adapter->tx_buf_tag,
 762                                     nm_info->map_seg[j]);
 763                                 nm_info->socket_buf_idx[j] = 0;
 764                         }
 765                 }
 766 #endif /* DEV_NETMAP */
 767
 768                 m_freem(tx_ring->tx_buffer_info[i].mbuf);
 769                 tx_ring->tx_buffer_info[i].mbuf = NULL;
 770         }
 771         ENA_RING_MTX_UNLOCK(tx_ring);
 772
 773         /* And free allocated memory. */
 774         free(tx_ring->tx_buffer_info, M_DEVBUF);
 775         tx_ring->tx_buffer_info = NULL;
 776
 777         free(tx_ring->free_tx_ids, M_DEVBUF);
 778         tx_ring->free_tx_ids = NULL;
 779
 780         free(tx_ring->push_buf_intermediate_buf, M_DEVBUF);
 781         tx_ring->push_buf_intermediate_buf = NULL;
 782 }
 783
 784 /**
 785  * ena_setup_all_tx_resources - allocate all queues Tx resources
 786  * @adapter: network interface device structure
 787  *
 788  * Returns 0 on success, otherwise on failure.
 789  **/
 790 static int
 791 ena_setup_all_tx_resources(struct ena_adapter *adapter)
 792 {
 793         int i, rc;
 794
 795         for (i = 0; i < adapter->num_io_queues; i++) {
 796                 rc = ena_setup_tx_resources(adapter, i);
 797                 if (rc != 0) {
 798                         ena_log(adapter->pdev, ERR,
 799                             "Allocation for Tx Queue %u failed\n", i);
 800                         goto err_setup_tx;
 801                 }
 802         }
 803
 804         return (0);
 805
 806 err_setup_tx:
 807         /* Rewind the index freeing the rings as we go */
 808         while (i--)
 809                 ena_free_tx_resources(adapter, i);
 810         return (rc);
 811 }
 812
 813 /**
 814  * ena_free_all_tx_resources - Free Tx Resources for All Queues
 815  * @adapter: network interface device structure
 816  *
 817  * Free all transmit software resources
 818  **/
 819 static void
 820 ena_free_all_tx_resources(struct ena_adapter *adapter)
 821 {
 822         int i;
 823
 824         for (i = 0; i < adapter->num_io_queues; i++)
 825                 ena_free_tx_resources(adapter, i);
 826 }
 827
 828 /**
 829  * ena_setup_rx_resources - allocate Rx resources (Descriptors)
 830  * @adapter: network interface device structure
 831  * @qid: queue index
 832  *
 833  * Returns 0 on success, otherwise on failure.
 834  **/
 835 static int
 836 ena_setup_rx_resources(struct ena_adapter *adapter, unsigned int qid)
 837 {
 838         device_t pdev = adapter->pdev;
 839         struct ena_que *que = &adapter->que[qid];
 840         struct ena_ring *rx_ring = que->rx_ring;
 841         int size, err, i;
 842
 843         size = sizeof(struct ena_rx_buffer) * rx_ring->ring_size;
 844
 845 #ifdef DEV_NETMAP
 846         ena_netmap_reset_rx_ring(adapter, qid);
 847         rx_ring->initialized = false;
 848 #endif /* DEV_NETMAP */
 849
 850         /*
 851          * Alloc extra element so in rx path
 852          * we can always prefetch rx_info + 1
 853          */
 854         size += sizeof(struct ena_rx_buffer);
 855
 856         rx_ring->rx_buffer_info = malloc(size, M_DEVBUF, M_WAITOK | M_ZERO);
 857
 858         size = sizeof(uint16_t) * rx_ring->ring_size;
 859         rx_ring->free_rx_ids = malloc(size, M_DEVBUF, M_WAITOK);
 860
 861         for (i = 0; i < rx_ring->ring_size; i++)
 862                 rx_ring->free_rx_ids[i] = i;
 863
 864         /* Reset RX statistics. */
 865         ena_reset_counters((counter_u64_t *)&rx_ring->rx_stats,
 866             sizeof(rx_ring->rx_stats));
 867
 868         rx_ring->next_to_clean = 0;
 869         rx_ring->next_to_use = 0;
 870
 871         /* ... and create the buffer DMA maps */
 872         for (i = 0; i < rx_ring->ring_size; i++) {
 873                 err = bus_dmamap_create(adapter->rx_buf_tag, 0,
 874                     &(rx_ring->rx_buffer_info[i].map));
 875                 if (err != 0) {
 876                         ena_log(pdev, ERR,
 877                             "Unable to create Rx DMA map for buffer %d\n", i);
 878                         goto err_buf_info_unmap;
 879                 }
 880         }
 881
 882         /* Create LRO for the ring */
 883         if ((if_getcapenable(adapter->ifp) & IFCAP_LRO) != 0) {
 884                 int err = tcp_lro_init(&rx_ring->lro);
 885                 if (err != 0) {
 886                         ena_log(pdev, ERR, "LRO[%d] Initialization failed!\n",
 887                             qid);
 888                 } else {
 889                         ena_log(pdev, DBG, "RX Soft LRO[%d] Initialized\n",
 890                             qid);
 891                         rx_ring->lro.ifp = adapter->ifp;
 892                 }
 893         }
 894
 895         return (0);
 896
 897 err_buf_info_unmap:
 898         while (i--) {
 899                 bus_dmamap_destroy(adapter->rx_buf_tag,
 900                     rx_ring->rx_buffer_info[i].map);
 901         }
 902
 903         free(rx_ring->free_rx_ids, M_DEVBUF);
 904         rx_ring->free_rx_ids = NULL;
 905         free(rx_ring->rx_buffer_info, M_DEVBUF);
 906         rx_ring->rx_buffer_info = NULL;
 907         return (ENOMEM);
 908 }
 909
 910 /**
 911  * ena_free_rx_resources - Free Rx Resources
 912  * @adapter: network interface device structure
 913  * @qid: queue index
 914  *
 915  * Free all receive software resources
 916  **/
 917 static void
 918 ena_free_rx_resources(struct ena_adapter *adapter, unsigned int qid)
 919 {
 920         struct ena_ring *rx_ring = &adapter->rx_ring[qid];
 921
 922         /* Free buffer DMA maps, */
 923         for (int i = 0; i < rx_ring->ring_size; i++) {
 924                 bus_dmamap_sync(adapter->rx_buf_tag,
 925                     rx_ring->rx_buffer_info[i].map, BUS_DMASYNC_POSTREAD);
 926                 m_freem(rx_ring->rx_buffer_info[i].mbuf);
 927                 rx_ring->rx_buffer_info[i].mbuf = NULL;
 928                 bus_dmamap_unload(adapter->rx_buf_tag,
 929                     rx_ring->rx_buffer_info[i].map);
 930                 bus_dmamap_destroy(adapter->rx_buf_tag,
 931                     rx_ring->rx_buffer_info[i].map);
 932         }
 933
 934         /* free LRO resources, */
 935         tcp_lro_free(&rx_ring->lro);
 936
 937         /* free allocated memory */
 938         free(rx_ring->rx_buffer_info, M_DEVBUF);
 939         rx_ring->rx_buffer_info = NULL;
 940
 941         free(rx_ring->free_rx_ids, M_DEVBUF);
 942         rx_ring->free_rx_ids = NULL;
 943 }
 944
 945 /**
 946  * ena_setup_all_rx_resources - allocate all queues Rx resources
 947  * @adapter: network interface device structure
 948  *
 949  * Returns 0 on success, otherwise on failure.
 950  **/
 951 static int
 952 ena_setup_all_rx_resources(struct ena_adapter *adapter)
 953 {
 954         int i, rc = 0;
 955
 956         for (i = 0; i < adapter->num_io_queues; i++) {
 957                 rc = ena_setup_rx_resources(adapter, i);
 958                 if (rc != 0) {
 959                         ena_log(adapter->pdev, ERR,
 960                             "Allocation for Rx Queue %u failed\n", i);
 961                         goto err_setup_rx;
 962                 }
 963         }
 964         return (0);
 965
 966 err_setup_rx:
 967         /* rewind the index freeing the rings as we go */
 968         while (i--)
 969                 ena_free_rx_resources(adapter, i);
 970         return (rc);
 971 }
 972
 973 /**
 974  * ena_free_all_rx_resources - Free Rx resources for all queues
 975  * @adapter: network interface device structure
 976  *
 977  * Free all receive software resources
 978  **/
 979 static void
 980 ena_free_all_rx_resources(struct ena_adapter *adapter)
 981 {
 982         int i;
 983
 984         for (i = 0; i < adapter->num_io_queues; i++)
 985                 ena_free_rx_resources(adapter, i);
 986 }
 987
 988 static inline int
 989 ena_alloc_rx_mbuf(struct ena_adapter *adapter, struct ena_ring *rx_ring,
 990     struct ena_rx_buffer *rx_info)
 991 {
 992         device_t pdev = adapter->pdev;
 993         struct ena_com_buf *ena_buf;
 994         bus_dma_segment_t segs[1];
 995         int nsegs, error;
 996         int mlen;
 997
 998         /* if previous allocated frag is not used */
 999         if (unlikely(rx_info->mbuf != NULL))
1000                 return (0);
1001
1002         /* Get mbuf using UMA allocator */
1003         rx_info->mbuf = m_getjcl(M_NOWAIT, MT_DATA, M_PKTHDR,
1004             rx_ring->rx_mbuf_sz);
1005
1006         if (unlikely(rx_info->mbuf == NULL)) {
1007                 counter_u64_add(rx_ring->rx_stats.mjum_alloc_fail, 1);
1008                 rx_info->mbuf = m_getcl(M_NOWAIT, MT_DATA, M_PKTHDR);
1009                 if (unlikely(rx_info->mbuf == NULL)) {
1010                         counter_u64_add(rx_ring->rx_stats.mbuf_alloc_fail, 1);
1011                         return (ENOMEM);
1012                 }
1013                 mlen = MCLBYTES;
1014         } else {
1015                 mlen = rx_ring->rx_mbuf_sz;
1016         }
1017         /* Set mbuf length*/
1018         rx_info->mbuf->m_pkthdr.len = rx_info->mbuf->m_len = mlen;
1019
1020         /* Map packets for DMA */
1021         ena_log(pdev, DBG,
1022             "Using tag %p for buffers' DMA mapping, mbuf %p len: %d\n",
1023             adapter->rx_buf_tag, rx_info->mbuf, rx_info->mbuf->m_len);
1024         error = bus_dmamap_load_mbuf_sg(adapter->rx_buf_tag, rx_info->map,
1025             rx_info->mbuf, segs, &nsegs, BUS_DMA_NOWAIT);
1026         if (unlikely((error != 0) || (nsegs != 1))) {
1027                 ena_log(pdev, WARN,
1028                     "failed to map mbuf, error: %d, nsegs: %d\n", error, nsegs);
1029                 counter_u64_add(rx_ring->rx_stats.dma_mapping_err, 1);
1030                 goto exit;
1031         }
1032
1033         bus_dmamap_sync(adapter->rx_buf_tag, rx_info->map, BUS_DMASYNC_PREREAD);
1034
1035         ena_buf = &rx_info->ena_buf;
1036         ena_buf->paddr = segs[0].ds_addr;
1037         ena_buf->len = mlen;
1038
1039         ena_log(pdev, DBG,
1040             "ALLOC RX BUF: mbuf %p, rx_info %p, len %d, paddr %#jx\n",
1041             rx_info->mbuf, rx_info, ena_buf->len, (uintmax_t)ena_buf->paddr);
1042
1043         return (0);
1044
1045 exit:
1046         m_freem(rx_info->mbuf);
1047         rx_info->mbuf = NULL;
1048         return (EFAULT);
1049 }
1050
1051 static void
1052 ena_free_rx_mbuf(struct ena_adapter *adapter, struct ena_ring *rx_ring,
1053     struct ena_rx_buffer *rx_info)
1054 {
1055         if (rx_info->mbuf == NULL) {
1056                 ena_log(adapter->pdev, WARN,
1057                     "Trying to free unallocated buffer\n");
1058                 return;
1059         }
1060
1061         bus_dmamap_sync(adapter->rx_buf_tag, rx_info->map,
1062             BUS_DMASYNC_POSTREAD);
1063         bus_dmamap_unload(adapter->rx_buf_tag, rx_info->map);
1064         m_freem(rx_info->mbuf);
1065         rx_info->mbuf = NULL;
1066 }
1067
1068 /**
1069  * ena_refill_rx_bufs - Refills ring with descriptors
1070  * @rx_ring: the ring which we want to feed with free descriptors
1071  * @num: number of descriptors to refill
1072  * Refills the ring with newly allocated DMA-mapped mbufs for receiving
1073  **/
1074 int
1075 ena_refill_rx_bufs(struct ena_ring *rx_ring, uint32_t num)
1076 {
1077         struct ena_adapter *adapter = rx_ring->adapter;
1078         device_t pdev = adapter->pdev;
1079         uint16_t next_to_use, req_id;
1080         uint32_t i;
1081         int rc;
1082
1083         ena_log_io(adapter->pdev, DBG, "refill qid: %d\n", rx_ring->qid);
1084
1085         next_to_use = rx_ring->next_to_use;
1086
1087         for (i = 0; i < num; i++) {
1088                 struct ena_rx_buffer *rx_info;
1089
1090                 ena_log_io(pdev, DBG, "RX buffer - next to use: %d\n",
1091                     next_to_use);
1092
1093                 req_id = rx_ring->free_rx_ids[next_to_use];
1094                 rx_info = &rx_ring->rx_buffer_info[req_id];
1095 #ifdef DEV_NETMAP
1096                 if (ena_rx_ring_in_netmap(adapter, rx_ring->qid))
1097                         rc = ena_netmap_alloc_rx_slot(adapter, rx_ring,
1098                             rx_info);
1099                 else
1100 #endif /* DEV_NETMAP */
1101                         rc = ena_alloc_rx_mbuf(adapter, rx_ring, rx_info);
1102                 if (unlikely(rc != 0)) {
1103                         ena_log_io(pdev, WARN,
1104                             "failed to alloc buffer for rx queue %d\n",
1105                             rx_ring->qid);
1106                         break;
1107                 }
1108                 rc = ena_com_add_single_rx_desc(rx_ring->ena_com_io_sq,
1109                     &rx_info->ena_buf, req_id);
1110                 if (unlikely(rc != 0)) {
1111                         ena_log_io(pdev, WARN,
1112                             "failed to add buffer for rx queue %d\n",
1113                             rx_ring->qid);
1114                         break;
1115                 }
1116                 next_to_use = ENA_RX_RING_IDX_NEXT(next_to_use,
1117                     rx_ring->ring_size);
1118         }
1119
1120         if (unlikely(i < num)) {
1121                 counter_u64_add(rx_ring->rx_stats.refil_partial, 1);
1122                 ena_log_io(pdev, WARN,
1123                     "refilled rx qid %d with only %d mbufs (from %d)\n",
1124                     rx_ring->qid, i, num);
1125         }
1126
1127         if (likely(i != 0))
1128                 ena_com_write_sq_doorbell(rx_ring->ena_com_io_sq);
1129
1130         rx_ring->next_to_use = next_to_use;
1131         return (i);
1132 }
1133
1134 int
1135 ena_update_buf_ring_size(struct ena_adapter *adapter,
1136     uint32_t new_buf_ring_size)
1137 {
1138         uint32_t old_buf_ring_size;
1139         int rc = 0;
1140         bool dev_was_up;
1141
1142         old_buf_ring_size = adapter->buf_ring_size;
1143         adapter->buf_ring_size = new_buf_ring_size;
1144
1145         dev_was_up = ENA_FLAG_ISSET(ENA_FLAG_DEV_UP, adapter);
1146         ena_down(adapter);
1147
1148         /* Reconfigure buf ring for all Tx rings. */
1149         ena_free_all_io_rings_resources(adapter);
1150         ena_init_io_rings_advanced(adapter);
1151         if (dev_was_up) {
1152                 /*
1153                  * If ena_up() fails, it's not because of recent buf_ring size
1154                  * changes. Because of that, we just want to revert old drbr
1155                  * value and trigger the reset because something else had to
1156                  * go wrong.
1157                  */
1158                 rc = ena_up(adapter);
1159                 if (unlikely(rc != 0)) {
1160                         ena_log(adapter->pdev, ERR,
1161                             "Failed to configure device after setting new drbr size: %u. Reverting old value: %u and triggering the reset\n",
1162                             new_buf_ring_size, old_buf_ring_size);
1163
1164                         /* Revert old size and trigger the reset */
1165                         adapter->buf_ring_size = old_buf_ring_size;
1166                         ena_free_all_io_rings_resources(adapter);
1167                         ena_init_io_rings_advanced(adapter);
1168
1169                         ENA_FLAG_SET_ATOMIC(ENA_FLAG_DEV_UP_BEFORE_RESET,
1170                             adapter);
1171                         ena_trigger_reset(adapter, ENA_REGS_RESET_OS_TRIGGER);
1172                 }
1173         }
1174
1175         return (rc);
1176 }
1177
1178 int
1179 ena_update_queue_size(struct ena_adapter *adapter, uint32_t new_tx_size,
1180     uint32_t new_rx_size)
1181 {
1182         uint32_t old_tx_size, old_rx_size;
1183         int rc = 0;
1184         bool dev_was_up;
1185
1186         old_tx_size = adapter->requested_tx_ring_size;
1187         old_rx_size = adapter->requested_rx_ring_size;
1188         adapter->requested_tx_ring_size = new_tx_size;
1189         adapter->requested_rx_ring_size = new_rx_size;
1190
1191         dev_was_up = ENA_FLAG_ISSET(ENA_FLAG_DEV_UP, adapter);
1192         ena_down(adapter);
1193
1194         /* Configure queues with new size. */
1195         ena_init_io_rings_basic(adapter);
1196         if (dev_was_up) {
1197                 rc = ena_up(adapter);
1198                 if (unlikely(rc != 0)) {
1199                         ena_log(adapter->pdev, ERR,
1200                             "Failed to configure device with the new sizes - Tx: %u Rx: %u. Reverting old values - Tx: %u Rx: %u\n",
1201                             new_tx_size, new_rx_size, old_tx_size, old_rx_size);
1202
1203                         /* Revert old size. */
1204                         adapter->requested_tx_ring_size = old_tx_size;
1205                         adapter->requested_rx_ring_size = old_rx_size;
1206                         ena_init_io_rings_basic(adapter);
1207
1208                         /* And try again. */
1209                         rc = ena_up(adapter);
1210                         if (unlikely(rc != 0)) {
1211                                 ena_log(adapter->pdev, ERR,
1212                                     "Failed to revert old queue sizes. Triggering device reset.\n");
1213                                 /*
1214                                  * If we've failed again, something had to go
1215                                  * wrong. After reset, the device should try to
1216                                  * go up
1217                                  */
1218                                 ENA_FLAG_SET_ATOMIC(
1219                                     ENA_FLAG_DEV_UP_BEFORE_RESET, adapter);
1220                                 ena_trigger_reset(adapter,
1221                                     ENA_REGS_RESET_OS_TRIGGER);
1222                         }
1223                 }
1224         }
1225
1226         return (rc);
1227 }
1228
1229 static void
1230 ena_update_io_rings(struct ena_adapter *adapter, uint32_t num)
1231 {
1232         ena_free_all_io_rings_resources(adapter);
1233         /* Force indirection table to be reinitialized */
1234         ena_com_rss_destroy(adapter->ena_dev);
1235
1236         adapter->num_io_queues = num;
1237         ena_init_io_rings(adapter);
1238 }
1239
1240 /* Caller should sanitize new_num */
1241 int
1242 ena_update_io_queue_nb(struct ena_adapter *adapter, uint32_t new_num)
1243 {
1244         uint32_t old_num;
1245         int rc = 0;
1246         bool dev_was_up;
1247
1248         dev_was_up = ENA_FLAG_ISSET(ENA_FLAG_DEV_UP, adapter);
1249         old_num = adapter->num_io_queues;
1250         ena_down(adapter);
1251
1252         ena_update_io_rings(adapter, new_num);
1253
1254         if (dev_was_up) {
1255                 rc = ena_up(adapter);
1256                 if (unlikely(rc != 0)) {
1257                         ena_log(adapter->pdev, ERR,
1258                             "Failed to configure device with %u IO queues. "
1259                             "Reverting to previous value: %u\n",
1260                             new_num, old_num);
1261
1262                         ena_update_io_rings(adapter, old_num);
1263
1264                         rc = ena_up(adapter);
1265                         if (unlikely(rc != 0)) {
1266                                 ena_log(adapter->pdev, ERR,
1267                                     "Failed to revert to previous setup IO "
1268                                     "queues. Triggering device reset.\n");
1269                                 ENA_FLAG_SET_ATOMIC(
1270                                     ENA_FLAG_DEV_UP_BEFORE_RESET, adapter);
1271                                 ena_trigger_reset(adapter,
1272                                     ENA_REGS_RESET_OS_TRIGGER);
1273                         }
1274                 }
1275         }
1276
1277         return (rc);
1278 }
1279
1280 static void
1281 ena_free_rx_bufs(struct ena_adapter *adapter, unsigned int qid)
1282 {
1283         struct ena_ring *rx_ring = &adapter->rx_ring[qid];
1284         unsigned int i;
1285
1286         for (i = 0; i < rx_ring->ring_size; i++) {
1287                 struct ena_rx_buffer *rx_info = &rx_ring->rx_buffer_info[i];
1288
1289                 if (rx_info->mbuf != NULL)
1290                         ena_free_rx_mbuf(adapter, rx_ring, rx_info);
1291 #ifdef DEV_NETMAP
1292                 if (((if_getflags(adapter->ifp) & IFF_DYING) == 0) &&
1293                     (if_getcapenable(adapter->ifp) & IFCAP_NETMAP)) {
1294                         if (rx_info->netmap_buf_idx != 0)
1295                                 ena_netmap_free_rx_slot(adapter, rx_ring,
1296                                     rx_info);
1297                 }
1298 #endif /* DEV_NETMAP */
1299         }
1300 }
1301
1302 /**
1303  * ena_refill_all_rx_bufs - allocate all queues Rx buffers
1304  * @adapter: network interface device structure
1305  *
1306  */
1307 static void
1308 ena_refill_all_rx_bufs(struct ena_adapter *adapter)
1309 {
1310         struct ena_ring *rx_ring;
1311         int i, rc, bufs_num;
1312
1313         for (i = 0; i < adapter->num_io_queues; i++) {
1314                 rx_ring = &adapter->rx_ring[i];
1315                 bufs_num = rx_ring->ring_size - 1;
1316                 rc = ena_refill_rx_bufs(rx_ring, bufs_num);
1317                 if (unlikely(rc != bufs_num))
1318                         ena_log_io(adapter->pdev, WARN,
1319                             "refilling Queue %d failed. "
1320                             "Allocated %d buffers from: %d\n",
1321                             i, rc, bufs_num);
1322 #ifdef DEV_NETMAP
1323                 rx_ring->initialized = true;
1324 #endif /* DEV_NETMAP */
1325         }
1326 }
1327
1328 static void
1329 ena_free_all_rx_bufs(struct ena_adapter *adapter)
1330 {
1331         int i;
1332
1333         for (i = 0; i < adapter->num_io_queues; i++)
1334                 ena_free_rx_bufs(adapter, i);
1335 }
1336
1337 /**
1338  * ena_free_tx_bufs - Free Tx Buffers per Queue
1339  * @adapter: network interface device structure
1340  * @qid: queue index
1341  **/
1342 static void
1343 ena_free_tx_bufs(struct ena_adapter *adapter, unsigned int qid)
1344 {
1345         bool print_once = true;
1346         struct ena_ring *tx_ring = &adapter->tx_ring[qid];
1347
1348         ENA_RING_MTX_LOCK(tx_ring);
1349         for (int i = 0; i < tx_ring->ring_size; i++) {
1350                 struct ena_tx_buffer *tx_info = &tx_ring->tx_buffer_info[i];
1351
1352                 if (tx_info->mbuf == NULL)
1353                         continue;
1354
1355                 if (print_once) {
1356                         ena_log(adapter->pdev, WARN,
1357                             "free uncompleted tx mbuf qid %d idx 0x%x\n", qid,
1358                             i);
1359                         print_once = false;
1360                 } else {
1361                         ena_log(adapter->pdev, DBG,
1362                             "free uncompleted tx mbuf qid %d idx 0x%x\n", qid,
1363                             i);
1364                 }
1365
1366                 bus_dmamap_sync(adapter->tx_buf_tag, tx_info->dmamap,
1367                     BUS_DMASYNC_POSTWRITE);
1368                 bus_dmamap_unload(adapter->tx_buf_tag, tx_info->dmamap);
1369
1370                 m_free(tx_info->mbuf);
1371                 tx_info->mbuf = NULL;
1372         }
1373         ENA_RING_MTX_UNLOCK(tx_ring);
1374 }
1375
1376 static void
1377 ena_free_all_tx_bufs(struct ena_adapter *adapter)
1378 {
1379         for (int i = 0; i < adapter->num_io_queues; i++)
1380                 ena_free_tx_bufs(adapter, i);
1381 }
1382
1383 static void
1384 ena_destroy_all_tx_queues(struct ena_adapter *adapter)
1385 {
1386         uint16_t ena_qid;
1387         int i;
1388
1389         for (i = 0; i < adapter->num_io_queues; i++) {
1390                 ena_qid = ENA_IO_TXQ_IDX(i);
1391                 ena_com_destroy_io_queue(adapter->ena_dev, ena_qid);
1392         }
1393 }
1394
1395 static void
1396 ena_destroy_all_rx_queues(struct ena_adapter *adapter)
1397 {
1398         uint16_t ena_qid;
1399         int i;
1400
1401         for (i = 0; i < adapter->num_io_queues; i++) {
1402                 ena_qid = ENA_IO_RXQ_IDX(i);
1403                 ena_com_destroy_io_queue(adapter->ena_dev, ena_qid);
1404         }
1405 }
1406
1407 static void
1408 ena_destroy_all_io_queues(struct ena_adapter *adapter)
1409 {
1410         struct ena_que *queue;
1411         int i;
1412
1413         for (i = 0; i < adapter->num_io_queues; i++) {
1414                 queue = &adapter->que[i];
1415                 while (taskqueue_cancel(queue->cleanup_tq, &queue->cleanup_task, NULL))
1416                         taskqueue_drain(queue->cleanup_tq, &queue->cleanup_task);
1417                 taskqueue_free(queue->cleanup_tq);
1418         }
1419
1420         ena_destroy_all_tx_queues(adapter);
1421         ena_destroy_all_rx_queues(adapter);
1422 }
1423
1424 static int
1425 ena_create_io_queues(struct ena_adapter *adapter)
1426 {
1427         struct ena_com_dev *ena_dev = adapter->ena_dev;
1428         struct ena_com_create_io_ctx ctx;
1429         struct ena_ring *ring;
1430         struct ena_que *queue;
1431         uint16_t ena_qid;
1432         uint32_t msix_vector;
1433         cpuset_t *cpu_mask = NULL;
1434         int rc, i;
1435
1436         /* Create TX queues */
1437         for (i = 0; i < adapter->num_io_queues; i++) {
1438                 msix_vector = ENA_IO_IRQ_IDX(i);
1439                 ena_qid = ENA_IO_TXQ_IDX(i);
1440                 ctx.mem_queue_type = ena_dev->tx_mem_queue_type;
1441                 ctx.direction = ENA_COM_IO_QUEUE_DIRECTION_TX;
1442                 ctx.queue_size = adapter->requested_tx_ring_size;
1443                 ctx.msix_vector = msix_vector;
1444                 ctx.qid = ena_qid;
1445                 ctx.numa_node = adapter->que[i].domain;
1446
1447                 rc = ena_com_create_io_queue(ena_dev, &ctx);
1448                 if (rc != 0) {
1449                         ena_log(adapter->pdev, ERR,
1450                             "Failed to create io TX queue #%d rc: %d\n", i, rc);
1451                         goto err_tx;
1452                 }
1453                 ring = &adapter->tx_ring[i];
1454                 rc = ena_com_get_io_handlers(ena_dev, ena_qid,
1455                     &ring->ena_com_io_sq, &ring->ena_com_io_cq);
1456                 if (rc != 0) {
1457                         ena_log(adapter->pdev, ERR,
1458                             "Failed to get TX queue handlers. TX queue num"
1459                             " %d rc: %d\n",
1460                             i, rc);
1461                         ena_com_destroy_io_queue(ena_dev, ena_qid);
1462                         goto err_tx;
1463                 }
1464
1465                 if (ctx.numa_node >= 0) {
1466                         ena_com_update_numa_node(ring->ena_com_io_cq,
1467                             ctx.numa_node);
1468                 }
1469         }
1470
1471         /* Create RX queues */
1472         for (i = 0; i < adapter->num_io_queues; i++) {
1473                 msix_vector = ENA_IO_IRQ_IDX(i);
1474                 ena_qid = ENA_IO_RXQ_IDX(i);
1475                 ctx.mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST;
1476                 ctx.direction = ENA_COM_IO_QUEUE_DIRECTION_RX;
1477                 ctx.queue_size = adapter->requested_rx_ring_size;
1478                 ctx.msix_vector = msix_vector;
1479                 ctx.qid = ena_qid;
1480                 ctx.numa_node = adapter->que[i].domain;
1481
1482                 rc = ena_com_create_io_queue(ena_dev, &ctx);
1483                 if (unlikely(rc != 0)) {
1484                         ena_log(adapter->pdev, ERR,
1485                             "Failed to create io RX queue[%d] rc: %d\n", i, rc);
1486                         goto err_rx;
1487                 }
1488
1489                 ring = &adapter->rx_ring[i];
1490                 rc = ena_com_get_io_handlers(ena_dev, ena_qid,
1491                     &ring->ena_com_io_sq, &ring->ena_com_io_cq);
1492                 if (unlikely(rc != 0)) {
1493                         ena_log(adapter->pdev, ERR,
1494                             "Failed to get RX queue handlers. RX queue num"
1495                             " %d rc: %d\n",
1496                             i, rc);
1497                         ena_com_destroy_io_queue(ena_dev, ena_qid);
1498                         goto err_rx;
1499                 }
1500
1501                 if (ctx.numa_node >= 0) {
1502                         ena_com_update_numa_node(ring->ena_com_io_cq,
1503                             ctx.numa_node);
1504                 }
1505         }
1506
1507         for (i = 0; i < adapter->num_io_queues; i++) {
1508                 queue = &adapter->que[i];
1509
1510                 NET_TASK_INIT(&queue->cleanup_task, 0, ena_cleanup, queue);
1511                 queue->cleanup_tq = taskqueue_create_fast("ena cleanup",
1512                     M_WAITOK, taskqueue_thread_enqueue, &queue->cleanup_tq);
1513
1514 #ifdef RSS
1515                 cpu_mask = &queue->cpu_mask;
1516 #endif
1517                 taskqueue_start_threads_cpuset(&queue->cleanup_tq, 1, PI_NET,
1518                     cpu_mask, "%s queue %d cleanup",
1519                     device_get_nameunit(adapter->pdev), i);
1520         }
1521
1522         return (0);
1523
1524 err_rx:
1525         while (i--)
1526                 ena_com_destroy_io_queue(ena_dev, ENA_IO_RXQ_IDX(i));
1527         i = adapter->num_io_queues;
1528 err_tx:
1529         while (i--)
1530                 ena_com_destroy_io_queue(ena_dev, ENA_IO_TXQ_IDX(i));
1531
1532         return (ENXIO);
1533 }
1534
1535 /*********************************************************************
1536  *
1537  *  MSIX & Interrupt Service routine
1538  *
1539  **********************************************************************/
1540
1541 /**
1542  * ena_handle_msix - MSIX Interrupt Handler for admin/async queue
1543  * @arg: interrupt number
1544  **/
1545 static void
1546 ena_intr_msix_mgmnt(void *arg)
1547 {
1548         struct ena_adapter *adapter = (struct ena_adapter *)arg;
1549
1550         ena_com_admin_q_comp_intr_handler(adapter->ena_dev);
1551         if (likely(ENA_FLAG_ISSET(ENA_FLAG_DEVICE_RUNNING, adapter)))
1552                 ena_com_aenq_intr_handler(adapter->ena_dev, arg);
1553 }
1554
1555 /**
1556  * ena_handle_msix - MSIX Interrupt Handler for Tx/Rx
1557  * @arg: queue
1558  **/
1559 static int
1560 ena_handle_msix(void *arg)
1561 {
1562         struct ena_que *queue = arg;
1563         struct ena_adapter *adapter = queue->adapter;
1564         if_t ifp = adapter->ifp;
1565
1566         if (unlikely((if_getdrvflags(ifp) & IFF_DRV_RUNNING) == 0))
1567                 return (FILTER_STRAY);
1568
1569         taskqueue_enqueue(queue->cleanup_tq, &queue->cleanup_task);
1570
1571         return (FILTER_HANDLED);
1572 }
1573
1574 static int
1575 ena_enable_msix(struct ena_adapter *adapter)
1576 {
1577         device_t dev = adapter->pdev;
1578         int msix_vecs, msix_req;
1579         int i, rc = 0;
1580
1581         if (ENA_FLAG_ISSET(ENA_FLAG_MSIX_ENABLED, adapter)) {
1582                 ena_log(dev, ERR, "Error, MSI-X is already enabled\n");
1583                 return (EINVAL);
1584         }
1585
1586         /* Reserved the max msix vectors we might need */
1587         msix_vecs = ENA_MAX_MSIX_VEC(adapter->max_num_io_queues);
1588
1589         adapter->msix_entries = malloc(msix_vecs * sizeof(struct msix_entry),
1590             M_DEVBUF, M_WAITOK | M_ZERO);
1591
1592         ena_log(dev, DBG, "trying to enable MSI-X, vectors: %d\n", msix_vecs);
1593
1594         for (i = 0; i < msix_vecs; i++) {
1595                 adapter->msix_entries[i].entry = i;
1596                 /* Vectors must start from 1 */
1597                 adapter->msix_entries[i].vector = i + 1;
1598         }
1599
1600         msix_req = msix_vecs;
1601         rc = pci_alloc_msix(dev, &msix_vecs);
1602         if (unlikely(rc != 0)) {
1603                 ena_log(dev, ERR, "Failed to enable MSIX, vectors %d rc %d\n",
1604                     msix_vecs, rc);
1605
1606                 rc = ENOSPC;
1607                 goto err_msix_free;
1608         }
1609
1610         if (msix_vecs != msix_req) {
1611                 if (msix_vecs == ENA_ADMIN_MSIX_VEC) {
1612                         ena_log(dev, ERR,
1613                             "Not enough number of MSI-x allocated: %d\n",
1614                             msix_vecs);
1615                         pci_release_msi(dev);
1616                         rc = ENOSPC;
1617                         goto err_msix_free;
1618                 }
1619                 ena_log(dev, ERR,
1620                     "Enable only %d MSI-x (out of %d), reduce "
1621                     "the number of queues\n",
1622                     msix_vecs, msix_req);
1623         }
1624
1625         adapter->msix_vecs = msix_vecs;
1626         ENA_FLAG_SET_ATOMIC(ENA_FLAG_MSIX_ENABLED, adapter);
1627
1628         return (0);
1629
1630 err_msix_free:
1631         free(adapter->msix_entries, M_DEVBUF);
1632         adapter->msix_entries = NULL;
1633
1634         return (rc);
1635 }
1636
1637 static void
1638 ena_setup_mgmnt_intr(struct ena_adapter *adapter)
1639 {
1640         snprintf(adapter->irq_tbl[ENA_MGMNT_IRQ_IDX].name, ENA_IRQNAME_SIZE,
1641             "ena-mgmnt@pci:%s", device_get_nameunit(adapter->pdev));
1642         /*
1643          * Handler is NULL on purpose, it will be set
1644          * when mgmnt interrupt is acquired
1645          */
1646         adapter->irq_tbl[ENA_MGMNT_IRQ_IDX].handler = NULL;
1647         adapter->irq_tbl[ENA_MGMNT_IRQ_IDX].data = adapter;
1648         adapter->irq_tbl[ENA_MGMNT_IRQ_IDX].vector =
1649             adapter->msix_entries[ENA_MGMNT_IRQ_IDX].vector;
1650 }
1651
1652 static int
1653 ena_setup_io_intr(struct ena_adapter *adapter)
1654 {
1655 #ifdef RSS
1656         int num_buckets = rss_getnumbuckets();
1657         static int last_bind = 0;
1658         int cur_bind;
1659         int idx;
1660 #endif
1661         int irq_idx;
1662
1663         if (adapter->msix_entries == NULL)
1664                 return (EINVAL);
1665
1666 #ifdef RSS
1667         if (adapter->first_bind < 0) {
1668                 adapter->first_bind = last_bind;
1669                 last_bind = (last_bind + adapter->num_io_queues) % num_buckets;
1670         }
1671         cur_bind = adapter->first_bind;
1672 #endif
1673
1674         for (int i = 0; i < adapter->num_io_queues; i++) {
1675                 irq_idx = ENA_IO_IRQ_IDX(i);
1676
1677                 snprintf(adapter->irq_tbl[irq_idx].name, ENA_IRQNAME_SIZE,
1678                     "%s-TxRx-%d", device_get_nameunit(adapter->pdev), i);
1679                 adapter->irq_tbl[irq_idx].handler = ena_handle_msix;
1680                 adapter->irq_tbl[irq_idx].data = &adapter->que[i];
1681                 adapter->irq_tbl[irq_idx].vector =
1682                     adapter->msix_entries[irq_idx].vector;
1683                 ena_log(adapter->pdev, DBG, "ena_setup_io_intr vector: %d\n",
1684                     adapter->msix_entries[irq_idx].vector);
1685
1686 #ifdef RSS
1687                 adapter->que[i].cpu = adapter->irq_tbl[irq_idx].cpu =
1688                     rss_getcpu(cur_bind);
1689                 cur_bind = (cur_bind + 1) % num_buckets;
1690                 CPU_SETOF(adapter->que[i].cpu, &adapter->que[i].cpu_mask);
1691
1692                 for (idx = 0; idx < MAXMEMDOM; ++idx) {
1693                         if (CPU_ISSET(adapter->que[i].cpu, &cpuset_domain[idx]))
1694                                 break;
1695                 }
1696                 adapter->que[i].domain = idx;
1697 #else
1698                 adapter->que[i].domain = -1;
1699 #endif
1700         }
1701
1702         return (0);
1703 }
1704
1705 static int
1706 ena_request_mgmnt_irq(struct ena_adapter *adapter)
1707 {
1708         device_t pdev = adapter->pdev;
1709         struct ena_irq *irq;
1710         unsigned long flags;
1711         int rc, rcc;
1712
1713         flags = RF_ACTIVE | RF_SHAREABLE;
1714
1715         irq = &adapter->irq_tbl[ENA_MGMNT_IRQ_IDX];
1716         irq->res = bus_alloc_resource_any(adapter->pdev, SYS_RES_IRQ,
1717             &irq->vector, flags);
1718
1719         if (unlikely(irq->res == NULL)) {
1720                 ena_log(pdev, ERR, "could not allocate irq vector: %d\n",
1721                     irq->vector);
1722                 return (ENXIO);
1723         }
1724
1725         rc = bus_setup_intr(adapter->pdev, irq->res,
1726             INTR_TYPE_NET | INTR_MPSAFE, NULL, ena_intr_msix_mgmnt, irq->data,
1727             &irq->cookie);
1728         if (unlikely(rc != 0)) {
1729                 ena_log(pdev, ERR,
1730                     "failed to register interrupt handler for irq %ju: %d\n",
1731                     rman_get_start(irq->res), rc);
1732                 goto err_res_free;
1733         }
1734         irq->requested = true;
1735
1736         return (rc);
1737
1738 err_res_free:
1739         ena_log(pdev, INFO, "releasing resource for irq %d\n", irq->vector);
1740         rcc = bus_release_resource(adapter->pdev, SYS_RES_IRQ, irq->vector,
1741             irq->res);
1742         if (unlikely(rcc != 0))
1743                 ena_log(pdev, ERR,
1744                     "dev has no parent while releasing res for irq: %d\n",
1745                     irq->vector);
1746         irq->res = NULL;
1747
1748         return (rc);
1749 }
1750
1751 static int
1752 ena_request_io_irq(struct ena_adapter *adapter)
1753 {
1754         device_t pdev = adapter->pdev;
1755         struct ena_irq *irq;
1756         unsigned long flags = 0;
1757         int rc = 0, i, rcc;
1758
1759         if (unlikely(!ENA_FLAG_ISSET(ENA_FLAG_MSIX_ENABLED, adapter))) {
1760                 ena_log(pdev, ERR,
1761                     "failed to request I/O IRQ: MSI-X is not enabled\n");
1762                 return (EINVAL);
1763         } else {
1764                 flags = RF_ACTIVE | RF_SHAREABLE;
1765         }
1766
1767         for (i = ENA_IO_IRQ_FIRST_IDX; i < adapter->msix_vecs; i++) {
1768                 irq = &adapter->irq_tbl[i];
1769
1770                 if (unlikely(irq->requested))
1771                         continue;
1772
1773                 irq->res = bus_alloc_resource_any(adapter->pdev, SYS_RES_IRQ,
1774                     &irq->vector, flags);
1775                 if (unlikely(irq->res == NULL)) {
1776                         rc = ENOMEM;
1777                         ena_log(pdev, ERR,
1778                             "could not allocate irq vector: %d\n", irq->vector);
1779                         goto err;
1780                 }
1781
1782                 rc = bus_setup_intr(adapter->pdev, irq->res,
1783                     INTR_TYPE_NET | INTR_MPSAFE, irq->handler, NULL, irq->data,
1784                     &irq->cookie);
1785                 if (unlikely(rc != 0)) {
1786                         ena_log(pdev, ERR,
1787                             "failed to register interrupt handler for irq %ju: %d\n",
1788                             rman_get_start(irq->res), rc);
1789                         goto err;
1790                 }
1791                 irq->requested = true;
1792
1793 #ifdef RSS
1794                 rc = bus_bind_intr(adapter->pdev, irq->res, irq->cpu);
1795                 if (unlikely(rc != 0)) {
1796                         ena_log(pdev, ERR,
1797                             "failed to bind interrupt handler for irq %ju to cpu %d: %d\n",
1798                             rman_get_start(irq->res), irq->cpu, rc);
1799                         goto err;
1800                 }
1801
1802                 ena_log(pdev, INFO, "queue %d - cpu %d\n",
1803                     i - ENA_IO_IRQ_FIRST_IDX, irq->cpu);
1804 #endif
1805         }
1806
1807         return (rc);
1808
1809 err:
1810
1811         for (; i >= ENA_IO_IRQ_FIRST_IDX; i--) {
1812                 irq = &adapter->irq_tbl[i];
1813                 rcc = 0;
1814
1815                 /* Once we entered err: section and irq->requested is true we
1816                    free both intr and resources */
1817                 if (irq->requested)
1818                         rcc = bus_teardown_intr(adapter->pdev, irq->res,
1819                             irq->cookie);
1820                 if (unlikely(rcc != 0))
1821                         ena_log(pdev, ERR,
1822                             "could not release irq: %d, error: %d\n",
1823                             irq->vector, rcc);
1824
1825                 /* If we entered err: section without irq->requested set we know
1826                    it was bus_alloc_resource_any() that needs cleanup, provided
1827                    res is not NULL. In case res is NULL no work in needed in
1828                    this iteration */
1829                 rcc = 0;
1830                 if (irq->res != NULL) {
1831                         rcc = bus_release_resource(adapter->pdev, SYS_RES_IRQ,
1832                             irq->vector, irq->res);
1833                 }
1834                 if (unlikely(rcc != 0))
1835                         ena_log(pdev, ERR,
1836                             "dev has no parent while releasing res for irq: %d\n",
1837                             irq->vector);
1838                 irq->requested = false;
1839                 irq->res = NULL;
1840         }
1841
1842         return (rc);
1843 }
1844
1845 static void
1846 ena_free_mgmnt_irq(struct ena_adapter *adapter)
1847 {
1848         device_t pdev = adapter->pdev;
1849         struct ena_irq *irq;
1850         int rc;
1851
1852         irq = &adapter->irq_tbl[ENA_MGMNT_IRQ_IDX];
1853         if (irq->requested) {
1854                 ena_log(pdev, DBG, "tear down irq: %d\n", irq->vector);
1855                 rc = bus_teardown_intr(adapter->pdev, irq->res, irq->cookie);
1856                 if (unlikely(rc != 0))
1857                         ena_log(pdev, ERR, "failed to tear down irq: %d\n",
1858                             irq->vector);
1859                 irq->requested = 0;
1860         }
1861
1862         if (irq->res != NULL) {
1863                 ena_log(pdev, DBG, "release resource irq: %d\n", irq->vector);
1864                 rc = bus_release_resource(adapter->pdev, SYS_RES_IRQ,
1865                     irq->vector, irq->res);
1866                 irq->res = NULL;
1867                 if (unlikely(rc != 0))
1868                         ena_log(pdev, ERR,
1869                             "dev has no parent while releasing res for irq: %d\n",
1870                             irq->vector);
1871         }
1872 }
1873
1874 static void
1875 ena_free_io_irq(struct ena_adapter *adapter)
1876 {
1877         device_t pdev = adapter->pdev;
1878         struct ena_irq *irq;
1879         int rc;
1880
1881         for (int i = ENA_IO_IRQ_FIRST_IDX; i < adapter->msix_vecs; i++) {
1882                 irq = &adapter->irq_tbl[i];
1883                 if (irq->requested) {
1884                         ena_log(pdev, DBG, "tear down irq: %d\n", irq->vector);
1885                         rc = bus_teardown_intr(adapter->pdev, irq->res,
1886                             irq->cookie);
1887                         if (unlikely(rc != 0)) {
1888                                 ena_log(pdev, ERR,
1889                                     "failed to tear down irq: %d\n",
1890                                     irq->vector);
1891                         }
1892                         irq->requested = 0;
1893                 }
1894
1895                 if (irq->res != NULL) {
1896                         ena_log(pdev, DBG, "release resource irq: %d\n",
1897                             irq->vector);
1898                         rc = bus_release_resource(adapter->pdev, SYS_RES_IRQ,
1899                             irq->vector, irq->res);
1900                         irq->res = NULL;
1901                         if (unlikely(rc != 0)) {
1902                                 ena_log(pdev, ERR,
1903                                     "dev has no parent while releasing res for irq: %d\n",
1904                                     irq->vector);
1905                         }
1906                 }
1907         }
1908 }
1909
1910 static void
1911 ena_free_irqs(struct ena_adapter *adapter)
1912 {
1913         ena_free_io_irq(adapter);
1914         ena_free_mgmnt_irq(adapter);
1915         ena_disable_msix(adapter);
1916 }
1917
1918 static void
1919 ena_disable_msix(struct ena_adapter *adapter)
1920 {
1921         if (ENA_FLAG_ISSET(ENA_FLAG_MSIX_ENABLED, adapter)) {
1922                 ENA_FLAG_CLEAR_ATOMIC(ENA_FLAG_MSIX_ENABLED, adapter);
1923                 pci_release_msi(adapter->pdev);
1924         }
1925
1926         adapter->msix_vecs = 0;
1927         free(adapter->msix_entries, M_DEVBUF);
1928         adapter->msix_entries = NULL;
1929 }
1930
1931 static void
1932 ena_unmask_all_io_irqs(struct ena_adapter *adapter)
1933 {
1934         struct ena_com_io_cq *io_cq;
1935         struct ena_eth_io_intr_reg intr_reg;
1936         struct ena_ring *tx_ring;
1937         uint16_t ena_qid;
1938         int i;
1939
1940         /* Unmask interrupts for all queues */
1941         for (i = 0; i < adapter->num_io_queues; i++) {
1942                 ena_qid = ENA_IO_TXQ_IDX(i);
1943                 io_cq = &adapter->ena_dev->io_cq_queues[ena_qid];
1944                 ena_com_update_intr_reg(&intr_reg, 0, 0, true);
1945                 tx_ring = &adapter->tx_ring[i];
1946                 counter_u64_add(tx_ring->tx_stats.unmask_interrupt_num, 1);
1947                 ena_com_unmask_intr(io_cq, &intr_reg);
1948         }
1949 }
1950
1951 static int
1952 ena_up_complete(struct ena_adapter *adapter)
1953 {
1954         int rc;
1955
1956         if (likely(ENA_FLAG_ISSET(ENA_FLAG_RSS_ACTIVE, adapter))) {
1957                 rc = ena_rss_configure(adapter);
1958                 if (rc != 0) {
1959                         ena_log(adapter->pdev, ERR,
1960                             "Failed to configure RSS\n");
1961                         return (rc);
1962                 }
1963         }
1964
1965         rc = ena_change_mtu(adapter->ifp, if_getmtu(adapter->ifp));
1966         if (unlikely(rc != 0))
1967                 return (rc);
1968
1969         ena_refill_all_rx_bufs(adapter);
1970         ena_reset_counters((counter_u64_t *)&adapter->hw_stats,
1971             sizeof(adapter->hw_stats));
1972
1973         return (0);
1974 }
1975
1976 static void
1977 set_io_rings_size(struct ena_adapter *adapter, int new_tx_size, int new_rx_size)
1978 {
1979         int i;
1980
1981         for (i = 0; i < adapter->num_io_queues; i++) {
1982                 adapter->tx_ring[i].ring_size = new_tx_size;
1983                 adapter->rx_ring[i].ring_size = new_rx_size;
1984         }
1985 }
1986
1987 static int
1988 create_queues_with_size_backoff(struct ena_adapter *adapter)
1989 {
1990         device_t pdev = adapter->pdev;
1991         int rc;
1992         uint32_t cur_rx_ring_size, cur_tx_ring_size;
1993         uint32_t new_rx_ring_size, new_tx_ring_size;
1994
1995         /*
1996          * Current queue sizes might be set to smaller than the requested
1997          * ones due to past queue allocation failures.
1998          */
1999         set_io_rings_size(adapter, adapter->requested_tx_ring_size,
2000             adapter->requested_rx_ring_size);
2001
2002         while (1) {
2003                 /* Allocate transmit descriptors */
2004                 rc = ena_setup_all_tx_resources(adapter);
2005                 if (unlikely(rc != 0)) {
2006                         ena_log(pdev, ERR, "err_setup_tx\n");
2007                         goto err_setup_tx;
2008                 }
2009
2010                 /* Allocate receive descriptors */
2011                 rc = ena_setup_all_rx_resources(adapter);
2012                 if (unlikely(rc != 0)) {
2013                         ena_log(pdev, ERR, "err_setup_rx\n");
2014                         goto err_setup_rx;
2015                 }
2016
2017                 /* Create IO queues for Rx & Tx */
2018                 rc = ena_create_io_queues(adapter);
2019                 if (unlikely(rc != 0)) {
2020                         ena_log(pdev, ERR, "create IO queues failed\n");
2021                         goto err_io_que;
2022                 }
2023
2024                 return (0);
2025
2026 err_io_que:
2027                 ena_free_all_rx_resources(adapter);
2028 err_setup_rx:
2029                 ena_free_all_tx_resources(adapter);
2030 err_setup_tx:
2031                 /*
2032                  * Lower the ring size if ENOMEM. Otherwise, return the
2033                  * error straightaway.
2034                  */
2035                 if (unlikely(rc != ENOMEM)) {
2036                         ena_log(pdev, ERR,
2037                             "Queue creation failed with error code: %d\n", rc);
2038                         return (rc);
2039                 }
2040
2041                 cur_tx_ring_size = adapter->tx_ring[0].ring_size;
2042                 cur_rx_ring_size = adapter->rx_ring[0].ring_size;
2043
2044                 ena_log(pdev, ERR,
2045                     "Not enough memory to create queues with sizes TX=%d, RX=%d\n",
2046                     cur_tx_ring_size, cur_rx_ring_size);
2047
2048                 new_tx_ring_size = cur_tx_ring_size;
2049                 new_rx_ring_size = cur_rx_ring_size;
2050
2051                 /*
2052                  * Decrease the size of a larger queue, or decrease both if they
2053                  * are the same size.
2054                  */
2055                 if (cur_rx_ring_size <= cur_tx_ring_size)
2056                         new_tx_ring_size = cur_tx_ring_size / 2;
2057                 if (cur_rx_ring_size >= cur_tx_ring_size)
2058                         new_rx_ring_size = cur_rx_ring_size / 2;
2059
2060                 if (new_tx_ring_size < ENA_MIN_RING_SIZE ||
2061                     new_rx_ring_size < ENA_MIN_RING_SIZE) {
2062                         ena_log(pdev, ERR,
2063                             "Queue creation failed with the smallest possible queue size"
2064                             "of %d for both queues. Not retrying with smaller queues\n",
2065                             ENA_MIN_RING_SIZE);
2066                         return (rc);
2067                 }
2068
2069                 ena_log(pdev, INFO,
2070                     "Retrying queue creation with sizes TX=%d, RX=%d\n",
2071                     new_tx_ring_size, new_rx_ring_size);
2072
2073                 set_io_rings_size(adapter, new_tx_ring_size, new_rx_ring_size);
2074         }
2075 }
2076
2077 int
2078 ena_up(struct ena_adapter *adapter)
2079 {
2080         int rc = 0;
2081
2082         ENA_LOCK_ASSERT();
2083
2084         if (unlikely(device_is_attached(adapter->pdev) == 0)) {
2085                 ena_log(adapter->pdev, ERR, "device is not attached!\n");
2086                 return (ENXIO);
2087         }
2088
2089         if (ENA_FLAG_ISSET(ENA_FLAG_DEV_UP, adapter))
2090                 return (0);
2091
2092         ena_log(adapter->pdev, INFO, "device is going UP\n");
2093
2094         /* setup interrupts for IO queues */
2095         rc = ena_setup_io_intr(adapter);
2096         if (unlikely(rc != 0)) {
2097                 ena_log(adapter->pdev, ERR, "error setting up IO interrupt\n");
2098                 goto error;
2099         }
2100         rc = ena_request_io_irq(adapter);
2101         if (unlikely(rc != 0)) {
2102                 ena_log(adapter->pdev, ERR, "err_req_irq\n");
2103                 goto error;
2104         }
2105
2106         ena_log(adapter->pdev, INFO,
2107             "Creating %u IO queues. Rx queue size: %d, Tx queue size: %d, LLQ is %s\n",
2108             adapter->num_io_queues,
2109             adapter->requested_rx_ring_size,
2110             adapter->requested_tx_ring_size,
2111             (adapter->ena_dev->tx_mem_queue_type ==
2112                 ENA_ADMIN_PLACEMENT_POLICY_DEV) ? "ENABLED" : "DISABLED");
2113
2114         rc = create_queues_with_size_backoff(adapter);
2115         if (unlikely(rc != 0)) {
2116                 ena_log(adapter->pdev, ERR,
2117                     "error creating queues with size backoff\n");
2118                 goto err_create_queues_with_backoff;
2119         }
2120
2121         if (ENA_FLAG_ISSET(ENA_FLAG_LINK_UP, adapter))
2122                 if_link_state_change(adapter->ifp, LINK_STATE_UP);
2123
2124         rc = ena_up_complete(adapter);
2125         if (unlikely(rc != 0))
2126                 goto err_up_complete;
2127
2128         counter_u64_add(adapter->dev_stats.interface_up, 1);
2129
2130         ena_update_hwassist(adapter);
2131
2132         if_setdrvflagbits(adapter->ifp, IFF_DRV_RUNNING, IFF_DRV_OACTIVE);
2133
2134         ENA_FLAG_SET_ATOMIC(ENA_FLAG_DEV_UP, adapter);
2135
2136         ena_unmask_all_io_irqs(adapter);
2137
2138         return (0);
2139
2140 err_up_complete:
2141         ena_destroy_all_io_queues(adapter);
2142         ena_free_all_rx_resources(adapter);
2143         ena_free_all_tx_resources(adapter);
2144 err_create_queues_with_backoff:
2145         ena_free_io_irq(adapter);
2146 error:
2147         return (rc);
2148 }
2149
2150 static uint64_t
2151 ena_get_counter(if_t ifp, ift_counter cnt)
2152 {
2153         struct ena_adapter *adapter;
2154         struct ena_hw_stats *stats;
2155
2156         adapter = if_getsoftc(ifp);
2157         stats = &adapter->hw_stats;
2158
2159         switch (cnt) {
2160         case IFCOUNTER_IPACKETS:
2161                 return (counter_u64_fetch(stats->rx_packets));
2162         case IFCOUNTER_OPACKETS:
2163                 return (counter_u64_fetch(stats->tx_packets));
2164         case IFCOUNTER_IBYTES:
2165                 return (counter_u64_fetch(stats->rx_bytes));
2166         case IFCOUNTER_OBYTES:
2167                 return (counter_u64_fetch(stats->tx_bytes));
2168         case IFCOUNTER_IQDROPS:
2169                 return (counter_u64_fetch(stats->rx_drops));
2170         case IFCOUNTER_OQDROPS:
2171                 return (counter_u64_fetch(stats->tx_drops));
2172         default:
2173                 return (if_get_counter_default(ifp, cnt));
2174         }
2175 }
2176
2177 static int
2178 ena_media_change(if_t ifp)
2179 {
2180         /* Media Change is not supported by firmware */
2181         return (0);
2182 }
2183
2184 static void
2185 ena_media_status(if_t ifp, struct ifmediareq *ifmr)
2186 {
2187         struct ena_adapter *adapter = if_getsoftc(ifp);
2188         ena_log(adapter->pdev, DBG, "Media status update\n");
2189
2190         ENA_LOCK_LOCK();
2191
2192         ifmr->ifm_status = IFM_AVALID;
2193         ifmr->ifm_active = IFM_ETHER;
2194
2195         if (!ENA_FLAG_ISSET(ENA_FLAG_LINK_UP, adapter)) {
2196                 ENA_LOCK_UNLOCK();
2197                 ena_log(adapter->pdev, INFO, "Link is down\n");
2198                 return;
2199         }
2200
2201         ifmr->ifm_status |= IFM_ACTIVE;
2202         ifmr->ifm_active |= IFM_UNKNOWN | IFM_FDX;
2203
2204         ENA_LOCK_UNLOCK();
2205 }
2206
2207 static void
2208 ena_init(void *arg)
2209 {
2210         struct ena_adapter *adapter = (struct ena_adapter *)arg;
2211
2212         if (!ENA_FLAG_ISSET(ENA_FLAG_DEV_UP, adapter)) {
2213                 ENA_LOCK_LOCK();
2214                 ena_up(adapter);
2215                 ENA_LOCK_UNLOCK();
2216         }
2217 }
2218
2219 static int
2220 ena_ioctl(if_t ifp, u_long command, caddr_t data)
2221 {
2222         struct ena_adapter *adapter;
2223         struct ifreq *ifr;
2224         int rc;
2225
2226         adapter = if_getsoftc(ifp);
2227         ifr = (struct ifreq *)data;
2228
2229         /*
2230          * Acquiring lock to prevent from running up and down routines parallel.
2231          */
2232         rc = 0;
2233         switch (command) {
2234         case SIOCSIFMTU:
2235                 if (if_getmtu(ifp) == ifr->ifr_mtu)
2236                         break;
2237                 ENA_LOCK_LOCK();
2238                 ena_down(adapter);
2239
2240                 ena_change_mtu(ifp, ifr->ifr_mtu);
2241
2242                 rc = ena_up(adapter);
2243                 ENA_LOCK_UNLOCK();
2244                 break;
2245
2246         case SIOCSIFFLAGS:
2247                 if ((if_getflags(ifp) & IFF_UP) != 0) {
2248                         if ((if_getdrvflags(ifp) & IFF_DRV_RUNNING) != 0) {
2249                                 if ((if_getflags(ifp) & (IFF_PROMISC |
2250                                     IFF_ALLMULTI)) != 0) {
2251                                         ena_log(adapter->pdev, INFO,
2252                                             "ioctl promisc/allmulti\n");
2253                                 }
2254                         } else {
2255                                 ENA_LOCK_LOCK();
2256                                 rc = ena_up(adapter);
2257                                 ENA_LOCK_UNLOCK();
2258                         }
2259                 } else {
2260                         if ((if_getdrvflags(ifp) & IFF_DRV_RUNNING) != 0) {
2261                                 ENA_LOCK_LOCK();
2262                                 ena_down(adapter);
2263                                 ENA_LOCK_UNLOCK();
2264                         }
2265                 }
2266                 break;
2267
2268         case SIOCADDMULTI:
2269         case SIOCDELMULTI:
2270                 break;
2271
2272         case SIOCSIFMEDIA:
2273         case SIOCGIFMEDIA:
2274                 rc = ifmedia_ioctl(ifp, ifr, &adapter->media, command);
2275                 break;
2276
2277         case SIOCSIFCAP:
2278                 {
2279                         int reinit = 0;
2280
2281                         if (ifr->ifr_reqcap != if_getcapenable(ifp)) {
2282                                 if_setcapenable(ifp, ifr->ifr_reqcap);
2283                                 reinit = 1;
2284                         }
2285
2286                         if ((reinit != 0) &&
2287                             ((if_getdrvflags(ifp) & IFF_DRV_RUNNING) != 0)) {
2288                                 ENA_LOCK_LOCK();
2289                                 ena_down(adapter);
2290                                 rc = ena_up(adapter);
2291                                 ENA_LOCK_UNLOCK();
2292                         }
2293                 }
2294
2295                 break;
2296         default:
2297                 rc = ether_ioctl(ifp, command, data);
2298                 break;
2299         }
2300
2301         return (rc);
2302 }
2303
2304 static int
2305 ena_get_dev_offloads(struct ena_com_dev_get_features_ctx *feat)
2306 {
2307         int caps = 0;
2308
2309         if ((feat->offload.tx &
2310             (ENA_ADMIN_FEATURE_OFFLOAD_DESC_TX_L4_IPV4_CSUM_FULL_MASK |
2311             ENA_ADMIN_FEATURE_OFFLOAD_DESC_TX_L4_IPV4_CSUM_PART_MASK |
2312             ENA_ADMIN_FEATURE_OFFLOAD_DESC_TX_L3_CSUM_IPV4_MASK)) != 0)
2313                 caps |= IFCAP_TXCSUM;
2314
2315         if ((feat->offload.tx &
2316             (ENA_ADMIN_FEATURE_OFFLOAD_DESC_TX_L4_IPV6_CSUM_FULL_MASK |
2317             ENA_ADMIN_FEATURE_OFFLOAD_DESC_TX_L4_IPV6_CSUM_PART_MASK)) != 0)
2318                 caps |= IFCAP_TXCSUM_IPV6;
2319
2320         if ((feat->offload.tx & ENA_ADMIN_FEATURE_OFFLOAD_DESC_TSO_IPV4_MASK) != 0)
2321                 caps |= IFCAP_TSO4;
2322
2323         if ((feat->offload.tx & ENA_ADMIN_FEATURE_OFFLOAD_DESC_TSO_IPV6_MASK) != 0)
2324                 caps |= IFCAP_TSO6;
2325
2326         if ((feat->offload.rx_supported &
2327             (ENA_ADMIN_FEATURE_OFFLOAD_DESC_RX_L4_IPV4_CSUM_MASK |
2328             ENA_ADMIN_FEATURE_OFFLOAD_DESC_RX_L3_CSUM_IPV4_MASK)) != 0)
2329                 caps |= IFCAP_RXCSUM;
2330
2331         if ((feat->offload.rx_supported &
2332             ENA_ADMIN_FEATURE_OFFLOAD_DESC_RX_L4_IPV6_CSUM_MASK) != 0)
2333                 caps |= IFCAP_RXCSUM_IPV6;
2334
2335         caps |= IFCAP_LRO | IFCAP_JUMBO_MTU;
2336
2337         return (caps);
2338 }
2339
2340 static void
2341 ena_update_host_info(struct ena_admin_host_info *host_info, if_t ifp)
2342 {
2343         host_info->supported_network_features[0] = (uint32_t)if_getcapabilities(ifp);
2344 }
2345
2346 static void
2347 ena_update_hwassist(struct ena_adapter *adapter)
2348 {
2349         if_t ifp = adapter->ifp;
2350         uint32_t feat = adapter->tx_offload_cap;
2351         int cap = if_getcapenable(ifp);
2352         int flags = 0;
2353
2354         if_clearhwassist(ifp);
2355
2356         if ((cap & IFCAP_TXCSUM) != 0) {
2357                 if ((feat &
2358                     ENA_ADMIN_FEATURE_OFFLOAD_DESC_TX_L3_CSUM_IPV4_MASK) != 0)
2359                         flags |= CSUM_IP;
2360                 if ((feat &
2361                     (ENA_ADMIN_FEATURE_OFFLOAD_DESC_TX_L4_IPV4_CSUM_FULL_MASK |
2362                     ENA_ADMIN_FEATURE_OFFLOAD_DESC_TX_L4_IPV4_CSUM_PART_MASK)) != 0)
2363                         flags |= CSUM_IP_UDP | CSUM_IP_TCP;
2364         }
2365
2366         if ((cap & IFCAP_TXCSUM_IPV6) != 0)
2367                 flags |= CSUM_IP6_UDP | CSUM_IP6_TCP;
2368
2369         if ((cap & IFCAP_TSO4) != 0)
2370                 flags |= CSUM_IP_TSO;
2371
2372         if ((cap & IFCAP_TSO6) != 0)
2373                 flags |= CSUM_IP6_TSO;
2374
2375         if_sethwassistbits(ifp, flags, 0);
2376 }
2377
2378 static int
2379 ena_setup_ifnet(device_t pdev, struct ena_adapter *adapter,
2380     struct ena_com_dev_get_features_ctx *feat)
2381 {
2382         if_t ifp;
2383         int caps = 0;
2384
2385         ifp = adapter->ifp = if_gethandle(IFT_ETHER);
2386         if (unlikely(ifp == NULL)) {
2387                 ena_log(pdev, ERR, "can not allocate ifnet structure\n");
2388                 return (ENXIO);
2389         }
2390         if_initname(ifp, device_get_name(pdev), device_get_unit(pdev));
2391         if_setdev(ifp, pdev);
2392         if_setsoftc(ifp, adapter);
2393
2394         if_setflags(ifp, IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST);
2395         if_setinitfn(ifp, ena_init);
2396         if_settransmitfn(ifp, ena_mq_start);
2397         if_setqflushfn(ifp, ena_qflush);
2398         if_setioctlfn(ifp, ena_ioctl);
2399         if_setgetcounterfn(ifp, ena_get_counter);
2400
2401         if_setsendqlen(ifp, adapter->requested_tx_ring_size);
2402         if_setsendqready(ifp);
2403         if_setmtu(ifp, ETHERMTU);
2404         if_setbaudrate(ifp, 0);
2405         /* Zeroize capabilities... */
2406         if_setcapabilities(ifp, 0);
2407         if_setcapenable(ifp, 0);
2408         /* check hardware support */
2409         caps = ena_get_dev_offloads(feat);
2410         /* ... and set them */
2411         if_setcapabilitiesbit(ifp, caps, 0);
2412
2413         /* TSO parameters */
2414         if_sethwtsomax(ifp, ENA_TSO_MAXSIZE -
2415             (ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN));
2416         if_sethwtsomaxsegcount(ifp, adapter->max_tx_sgl_size - 1);
2417         if_sethwtsomaxsegsize(ifp, ENA_TSO_MAXSIZE);
2418
2419         if_setifheaderlen(ifp, sizeof(struct ether_vlan_header));
2420         if_setcapenable(ifp, if_getcapabilities(ifp));
2421
2422         /*
2423          * Specify the media types supported by this adapter and register
2424          * callbacks to update media and link information
2425          */
2426         ifmedia_init(&adapter->media, IFM_IMASK, ena_media_change,
2427             ena_media_status);
2428         ifmedia_add(&adapter->media, IFM_ETHER | IFM_AUTO, 0, NULL);
2429         ifmedia_set(&adapter->media, IFM_ETHER | IFM_AUTO);
2430
2431         ether_ifattach(ifp, adapter->mac_addr);
2432
2433         return (0);
2434 }
2435
2436 void
2437 ena_down(struct ena_adapter *adapter)
2438 {
2439         int rc;
2440
2441         ENA_LOCK_ASSERT();
2442
2443         if (!ENA_FLAG_ISSET(ENA_FLAG_DEV_UP, adapter))
2444                 return;
2445
2446         ena_log(adapter->pdev, INFO, "device is going DOWN\n");
2447
2448         ENA_FLAG_CLEAR_ATOMIC(ENA_FLAG_DEV_UP, adapter);
2449         if_setdrvflagbits(adapter->ifp, IFF_DRV_OACTIVE, IFF_DRV_RUNNING);
2450
2451         ena_free_io_irq(adapter);
2452
2453         if (ENA_FLAG_ISSET(ENA_FLAG_TRIGGER_RESET, adapter)) {
2454                 rc = ena_com_dev_reset(adapter->ena_dev, adapter->reset_reason);
2455                 if (unlikely(rc != 0))
2456                         ena_log(adapter->pdev, ERR, "Device reset failed\n");
2457         }
2458
2459         ena_destroy_all_io_queues(adapter);
2460
2461         ena_free_all_tx_bufs(adapter);
2462         ena_free_all_rx_bufs(adapter);
2463         ena_free_all_tx_resources(adapter);
2464         ena_free_all_rx_resources(adapter);
2465
2466         counter_u64_add(adapter->dev_stats.interface_down, 1);
2467 }
2468
2469 static uint32_t
2470 ena_calc_max_io_queue_num(device_t pdev, struct ena_com_dev *ena_dev,
2471     struct ena_com_dev_get_features_ctx *get_feat_ctx)
2472 {
2473         uint32_t io_tx_sq_num, io_tx_cq_num, io_rx_num, max_num_io_queues;
2474
2475         /* Regular queues capabilities */
2476         if (ena_dev->supported_features & BIT(ENA_ADMIN_MAX_QUEUES_EXT)) {
2477                 struct ena_admin_queue_ext_feature_fields *max_queue_ext =
2478                     &get_feat_ctx->max_queue_ext.max_queue_ext;
2479                 io_rx_num = min_t(int, max_queue_ext->max_rx_sq_num,
2480                     max_queue_ext->max_rx_cq_num);
2481
2482                 io_tx_sq_num = max_queue_ext->max_tx_sq_num;
2483                 io_tx_cq_num = max_queue_ext->max_tx_cq_num;
2484         } else {
2485                 struct ena_admin_queue_feature_desc *max_queues =
2486                     &get_feat_ctx->max_queues;
2487                 io_tx_sq_num = max_queues->max_sq_num;
2488                 io_tx_cq_num = max_queues->max_cq_num;
2489                 io_rx_num = min_t(int, io_tx_sq_num, io_tx_cq_num);
2490         }
2491
2492         /* In case of LLQ use the llq fields for the tx SQ/CQ */
2493         if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV)
2494                 io_tx_sq_num = get_feat_ctx->llq.max_llq_num;
2495
2496         max_num_io_queues = min_t(uint32_t, mp_ncpus, ENA_MAX_NUM_IO_QUEUES);
2497         max_num_io_queues = min_t(uint32_t, max_num_io_queues, io_rx_num);
2498         max_num_io_queues = min_t(uint32_t, max_num_io_queues, io_tx_sq_num);
2499         max_num_io_queues = min_t(uint32_t, max_num_io_queues, io_tx_cq_num);
2500         /* 1 IRQ for mgmnt and 1 IRQ for each TX/RX pair */
2501         max_num_io_queues = min_t(uint32_t, max_num_io_queues,
2502             pci_msix_count(pdev) - 1);
2503 #ifdef RSS
2504         max_num_io_queues = min_t(uint32_t, max_num_io_queues,
2505             rss_getnumbuckets());
2506 #endif
2507
2508         return (max_num_io_queues);
2509 }
2510
2511 static int
2512 ena_enable_wc(device_t pdev, struct resource *res)
2513 {
2514 #if defined(__i386) || defined(__amd64) || defined(__aarch64__)
2515         vm_offset_t va;
2516         vm_size_t len;
2517         int rc;
2518
2519         va = (vm_offset_t)rman_get_virtual(res);
2520         len = rman_get_size(res);
2521         /* Enable write combining */
2522         rc = pmap_change_attr(va, len, VM_MEMATTR_WRITE_COMBINING);
2523         if (unlikely(rc != 0)) {
2524                 ena_log(pdev, ERR, "pmap_change_attr failed, %d\n", rc);
2525                 return (rc);
2526         }
2527
2528         return (0);
2529 #endif
2530         return (EOPNOTSUPP);
2531 }
2532
2533 static int
2534 ena_set_queues_placement_policy(device_t pdev, struct ena_com_dev *ena_dev,
2535     struct ena_admin_feature_llq_desc *llq,
2536     struct ena_llq_configurations *llq_default_configurations)
2537 {
2538         int rc;
2539         uint32_t llq_feature_mask;
2540
2541         llq_feature_mask = 1 << ENA_ADMIN_LLQ;
2542         if (!(ena_dev->supported_features & llq_feature_mask)) {
2543                 ena_log(pdev, WARN,
2544                     "LLQ is not supported. Fallback to host mode policy.\n");
2545                 ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST;
2546                 return (0);
2547         }
2548
2549         if (ena_dev->mem_bar == NULL) {
2550                 ena_log(pdev, WARN,
2551                     "LLQ is advertised as supported but device doesn't expose mem bar.\n");
2552                 ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST;
2553                 return (0);
2554         }
2555
2556         rc = ena_com_config_dev_mode(ena_dev, llq, llq_default_configurations);
2557         if (unlikely(rc != 0)) {
2558                 ena_log(pdev, WARN,
2559                     "Failed to configure the device mode. "
2560                     "Fallback to host mode policy.\n");
2561                 ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST;
2562         }
2563
2564         return (0);
2565 }
2566
2567 static int
2568 ena_map_llq_mem_bar(device_t pdev, struct ena_com_dev *ena_dev)
2569 {
2570         struct ena_adapter *adapter = device_get_softc(pdev);
2571         int rc, rid;
2572
2573         /* Try to allocate resources for LLQ bar */
2574         rid = PCIR_BAR(ENA_MEM_BAR);
2575         adapter->memory = bus_alloc_resource_any(pdev, SYS_RES_MEMORY, &rid,
2576             RF_ACTIVE);
2577         if (unlikely(adapter->memory == NULL)) {
2578                 ena_log(pdev, WARN,
2579                     "Unable to allocate LLQ bar resource. LLQ mode won't be used.\n");
2580                 return (0);
2581         }
2582
2583         /* Enable write combining for better LLQ performance */
2584         rc = ena_enable_wc(adapter->pdev, adapter->memory);
2585         if (unlikely(rc != 0)) {
2586                 ena_log(pdev, ERR, "failed to enable write combining.\n");
2587                 return (rc);
2588         }
2589
2590         /*
2591          * Save virtual address of the device's memory region
2592          * for the ena_com layer.
2593          */
2594         ena_dev->mem_bar = rman_get_virtual(adapter->memory);
2595
2596         return (0);
2597 }
2598
2599 static inline void
2600 set_default_llq_configurations(struct ena_llq_configurations *llq_config,
2601     struct ena_admin_feature_llq_desc *llq)
2602 {
2603         llq_config->llq_header_location = ENA_ADMIN_INLINE_HEADER;
2604         llq_config->llq_stride_ctrl = ENA_ADMIN_MULTIPLE_DESCS_PER_ENTRY;
2605         llq_config->llq_num_decs_before_header =
2606             ENA_ADMIN_LLQ_NUM_DESCS_BEFORE_HEADER_2;
2607         if ((llq->entry_size_ctrl_supported & ENA_ADMIN_LIST_ENTRY_SIZE_256B) !=
2608             0 && ena_force_large_llq_header) {
2609                 llq_config->llq_ring_entry_size =
2610                     ENA_ADMIN_LIST_ENTRY_SIZE_256B;
2611                 llq_config->llq_ring_entry_size_value = 256;
2612         } else {
2613                 llq_config->llq_ring_entry_size =
2614                     ENA_ADMIN_LIST_ENTRY_SIZE_128B;
2615                 llq_config->llq_ring_entry_size_value = 128;
2616         }
2617 }
2618
2619 static int
2620 ena_calc_io_queue_size(struct ena_calc_queue_size_ctx *ctx)
2621 {
2622         struct ena_admin_feature_llq_desc *llq = &ctx->get_feat_ctx->llq;
2623         struct ena_com_dev *ena_dev = ctx->ena_dev;
2624         uint32_t tx_queue_size = ENA_DEFAULT_RING_SIZE;
2625         uint32_t rx_queue_size = ENA_DEFAULT_RING_SIZE;
2626         uint32_t max_tx_queue_size;
2627         uint32_t max_rx_queue_size;
2628
2629         if (ena_dev->supported_features & BIT(ENA_ADMIN_MAX_QUEUES_EXT)) {
2630                 struct ena_admin_queue_ext_feature_fields *max_queue_ext =
2631                     &ctx->get_feat_ctx->max_queue_ext.max_queue_ext;
2632                 max_rx_queue_size = min_t(uint32_t,
2633                     max_queue_ext->max_rx_cq_depth,
2634                     max_queue_ext->max_rx_sq_depth);
2635                 max_tx_queue_size = max_queue_ext->max_tx_cq_depth;
2636
2637                 if (ena_dev->tx_mem_queue_type ==
2638                     ENA_ADMIN_PLACEMENT_POLICY_DEV)
2639                         max_tx_queue_size = min_t(uint32_t, max_tx_queue_size,
2640                             llq->max_llq_depth);
2641                 else
2642                         max_tx_queue_size = min_t(uint32_t, max_tx_queue_size,
2643                             max_queue_ext->max_tx_sq_depth);
2644
2645                 ctx->max_tx_sgl_size = min_t(uint16_t, ENA_PKT_MAX_BUFS,
2646                     max_queue_ext->max_per_packet_tx_descs);
2647                 ctx->max_rx_sgl_size = min_t(uint16_t, ENA_PKT_MAX_BUFS,
2648                     max_queue_ext->max_per_packet_rx_descs);
2649         } else {
2650                 struct ena_admin_queue_feature_desc *max_queues =
2651                     &ctx->get_feat_ctx->max_queues;
2652                 max_rx_queue_size = min_t(uint32_t, max_queues->max_cq_depth,
2653                     max_queues->max_sq_depth);
2654                 max_tx_queue_size = max_queues->max_cq_depth;
2655
2656                 if (ena_dev->tx_mem_queue_type ==
2657                     ENA_ADMIN_PLACEMENT_POLICY_DEV)
2658                         max_tx_queue_size = min_t(uint32_t, max_tx_queue_size,
2659                             llq->max_llq_depth);
2660                 else
2661                         max_tx_queue_size = min_t(uint32_t, max_tx_queue_size,
2662                             max_queues->max_sq_depth);
2663
2664                 ctx->max_tx_sgl_size = min_t(uint16_t, ENA_PKT_MAX_BUFS,
2665                     max_queues->max_packet_tx_descs);
2666                 ctx->max_rx_sgl_size = min_t(uint16_t, ENA_PKT_MAX_BUFS,
2667                     max_queues->max_packet_rx_descs);
2668         }
2669
2670         /* round down to the nearest power of 2 */
2671         max_tx_queue_size = 1 << (flsl(max_tx_queue_size) - 1);
2672         max_rx_queue_size = 1 << (flsl(max_rx_queue_size) - 1);
2673
2674         /*
2675          * When forcing large headers, we multiply the entry size by 2,
2676          * and therefore divide the queue size by 2, leaving the amount
2677          * of memory used by the queues unchanged.
2678          */
2679         if (ena_force_large_llq_header) {
2680                 if ((llq->entry_size_ctrl_supported &
2681                     ENA_ADMIN_LIST_ENTRY_SIZE_256B) != 0 &&
2682                     ena_dev->tx_mem_queue_type ==
2683                     ENA_ADMIN_PLACEMENT_POLICY_DEV) {
2684                         max_tx_queue_size /= 2;
2685                         ena_log(ctx->pdev, INFO,
2686                             "Forcing large headers and decreasing maximum Tx queue size to %d\n",
2687                             max_tx_queue_size);
2688                 } else {
2689                         ena_log(ctx->pdev, WARN,
2690                             "Forcing large headers failed: LLQ is disabled or device does not support large headers\n");
2691                 }
2692         }
2693
2694         tx_queue_size = clamp_val(tx_queue_size, ENA_MIN_RING_SIZE,
2695             max_tx_queue_size);
2696         rx_queue_size = clamp_val(rx_queue_size, ENA_MIN_RING_SIZE,
2697             max_rx_queue_size);
2698
2699         tx_queue_size = 1 << (flsl(tx_queue_size) - 1);
2700         rx_queue_size = 1 << (flsl(rx_queue_size) - 1);
2701
2702         ctx->max_tx_queue_size = max_tx_queue_size;
2703         ctx->max_rx_queue_size = max_rx_queue_size;
2704         ctx->tx_queue_size = tx_queue_size;
2705         ctx->rx_queue_size = rx_queue_size;
2706
2707         return (0);
2708 }
2709
2710 static void
2711 ena_config_host_info(struct ena_com_dev *ena_dev, device_t dev)
2712 {
2713         struct ena_admin_host_info *host_info;
2714         uintptr_t rid;
2715         int rc;
2716
2717         /* Allocate only the host info */
2718         rc = ena_com_allocate_host_info(ena_dev);
2719         if (unlikely(rc != 0)) {
2720                 ena_log(dev, ERR, "Cannot allocate host info\n");
2721                 return;
2722         }
2723
2724         host_info = ena_dev->host_attr.host_info;
2725
2726         if (pci_get_id(dev, PCI_ID_RID, &rid) == 0)
2727                 host_info->bdf = rid;
2728         host_info->os_type = ENA_ADMIN_OS_FREEBSD;
2729         host_info->kernel_ver = osreldate;
2730
2731         sprintf(host_info->kernel_ver_str, "%d", osreldate);
2732         host_info->os_dist = 0;
2733         strncpy(host_info->os_dist_str, osrelease,
2734             sizeof(host_info->os_dist_str) - 1);
2735
2736         host_info->driver_version = (ENA_DRV_MODULE_VER_MAJOR) |
2737             (ENA_DRV_MODULE_VER_MINOR << ENA_ADMIN_HOST_INFO_MINOR_SHIFT) |
2738             (ENA_DRV_MODULE_VER_SUBMINOR << ENA_ADMIN_HOST_INFO_SUB_MINOR_SHIFT);
2739         host_info->num_cpus = mp_ncpus;
2740         host_info->driver_supported_features =
2741             ENA_ADMIN_HOST_INFO_RX_OFFSET_MASK |
2742             ENA_ADMIN_HOST_INFO_RSS_CONFIGURABLE_FUNCTION_KEY_MASK;
2743
2744         rc = ena_com_set_host_attributes(ena_dev);
2745         if (unlikely(rc != 0)) {
2746                 if (rc == EOPNOTSUPP)
2747                         ena_log(dev, WARN, "Cannot set host attributes\n");
2748                 else
2749                         ena_log(dev, ERR, "Cannot set host attributes\n");
2750
2751                 goto err;
2752         }
2753
2754         return;
2755
2756 err:
2757         ena_com_delete_host_info(ena_dev);
2758 }
2759
2760 static int
2761 ena_device_init(struct ena_adapter *adapter, device_t pdev,
2762     struct ena_com_dev_get_features_ctx *get_feat_ctx, int *wd_active)
2763 {
2764         struct ena_llq_configurations llq_config;
2765         struct ena_com_dev *ena_dev = adapter->ena_dev;
2766         bool readless_supported;
2767         uint32_t aenq_groups;
2768         int dma_width;
2769         int rc;
2770
2771         rc = ena_com_mmio_reg_read_request_init(ena_dev);
2772         if (unlikely(rc != 0)) {
2773                 ena_log(pdev, ERR, "failed to init mmio read less\n");
2774                 return (rc);
2775         }
2776
2777         /*
2778          * The PCIe configuration space revision id indicate if mmio reg
2779          * read is disabled
2780          */
2781         readless_supported = !(pci_get_revid(pdev) & ENA_MMIO_DISABLE_REG_READ);
2782         ena_com_set_mmio_read_mode(ena_dev, readless_supported);
2783
2784         rc = ena_com_dev_reset(ena_dev, ENA_REGS_RESET_NORMAL);
2785         if (unlikely(rc != 0)) {
2786                 ena_log(pdev, ERR, "Can not reset device\n");
2787                 goto err_mmio_read_less;
2788         }
2789
2790         rc = ena_com_validate_version(ena_dev);
2791         if (unlikely(rc != 0)) {
2792                 ena_log(pdev, ERR, "device version is too low\n");
2793                 goto err_mmio_read_less;
2794         }
2795
2796         dma_width = ena_com_get_dma_width(ena_dev);
2797         if (unlikely(dma_width < 0)) {
2798                 ena_log(pdev, ERR, "Invalid dma width value %d", dma_width);
2799                 rc = dma_width;
2800                 goto err_mmio_read_less;
2801         }
2802         adapter->dma_width = dma_width;
2803
2804         /* ENA admin level init */
2805         rc = ena_com_admin_init(ena_dev, &aenq_handlers);
2806         if (unlikely(rc != 0)) {
2807                 ena_log(pdev, ERR,
2808                     "Can not initialize ena admin queue with device\n");
2809                 goto err_mmio_read_less;
2810         }
2811
2812         /*
2813          * To enable the msix interrupts the driver needs to know the number
2814          * of queues. So the driver uses polling mode to retrieve this
2815          * information
2816          */
2817         ena_com_set_admin_polling_mode(ena_dev, true);
2818
2819         ena_config_host_info(ena_dev, pdev);
2820
2821         /* Get Device Attributes */
2822         rc = ena_com_get_dev_attr_feat(ena_dev, get_feat_ctx);
2823         if (unlikely(rc != 0)) {
2824                 ena_log(pdev, ERR,
2825                     "Cannot get attribute for ena device rc: %d\n", rc);
2826                 goto err_admin_init;
2827         }
2828
2829         aenq_groups = BIT(ENA_ADMIN_LINK_CHANGE) |
2830             BIT(ENA_ADMIN_FATAL_ERROR) |
2831             BIT(ENA_ADMIN_WARNING) |
2832             BIT(ENA_ADMIN_NOTIFICATION) |
2833             BIT(ENA_ADMIN_KEEP_ALIVE);
2834
2835         aenq_groups &= get_feat_ctx->aenq.supported_groups;
2836         rc = ena_com_set_aenq_config(ena_dev, aenq_groups);
2837         if (unlikely(rc != 0)) {
2838                 ena_log(pdev, ERR, "Cannot configure aenq groups rc: %d\n", rc);
2839                 goto err_admin_init;
2840         }
2841
2842         *wd_active = !!(aenq_groups & BIT(ENA_ADMIN_KEEP_ALIVE));
2843
2844         set_default_llq_configurations(&llq_config, &get_feat_ctx->llq);
2845
2846         rc = ena_set_queues_placement_policy(pdev, ena_dev, &get_feat_ctx->llq,
2847             &llq_config);
2848         if (unlikely(rc != 0)) {
2849                 ena_log(pdev, ERR, "Failed to set placement policy\n");
2850                 goto err_admin_init;
2851         }
2852
2853         return (0);
2854
2855 err_admin_init:
2856         ena_com_delete_host_info(ena_dev);
2857         ena_com_admin_destroy(ena_dev);
2858 err_mmio_read_less:
2859         ena_com_mmio_reg_read_request_destroy(ena_dev);
2860
2861         return (rc);
2862 }
2863
2864 static int
2865 ena_enable_msix_and_set_admin_interrupts(struct ena_adapter *adapter)
2866 {
2867         struct ena_com_dev *ena_dev = adapter->ena_dev;
2868         int rc;
2869
2870         rc = ena_enable_msix(adapter);
2871         if (unlikely(rc != 0)) {
2872                 ena_log(adapter->pdev, ERR, "Error with MSI-X enablement\n");
2873                 return (rc);
2874         }
2875
2876         ena_setup_mgmnt_intr(adapter);
2877
2878         rc = ena_request_mgmnt_irq(adapter);
2879         if (unlikely(rc != 0)) {
2880                 ena_log(adapter->pdev, ERR, "Cannot setup mgmnt queue intr\n");
2881                 goto err_disable_msix;
2882         }
2883
2884         ena_com_set_admin_polling_mode(ena_dev, false);
2885
2886         ena_com_admin_aenq_enable(ena_dev);
2887
2888         return (0);
2889
2890 err_disable_msix:
2891         ena_disable_msix(adapter);
2892
2893         return (rc);
2894 }
2895
2896 /* Function called on ENA_ADMIN_KEEP_ALIVE event */
2897 static void
2898 ena_keep_alive_wd(void *adapter_data, struct ena_admin_aenq_entry *aenq_e)
2899 {
2900         struct ena_adapter *adapter = (struct ena_adapter *)adapter_data;
2901         struct ena_admin_aenq_keep_alive_desc *desc;
2902         sbintime_t stime;
2903         uint64_t rx_drops;
2904         uint64_t tx_drops;
2905
2906         desc = (struct ena_admin_aenq_keep_alive_desc *)aenq_e;
2907
2908         rx_drops = ((uint64_t)desc->rx_drops_high << 32) | desc->rx_drops_low;
2909         tx_drops = ((uint64_t)desc->tx_drops_high << 32) | desc->tx_drops_low;
2910         counter_u64_zero(adapter->hw_stats.rx_drops);
2911         counter_u64_add(adapter->hw_stats.rx_drops, rx_drops);
2912         counter_u64_zero(adapter->hw_stats.tx_drops);
2913         counter_u64_add(adapter->hw_stats.tx_drops, tx_drops);
2914
2915         stime = getsbinuptime();
2916         atomic_store_rel_64(&adapter->keep_alive_timestamp, stime);
2917 }
2918
2919 /* Check for keep alive expiration */
2920 static void
2921 check_for_missing_keep_alive(struct ena_adapter *adapter)
2922 {
2923         sbintime_t timestamp, time;
2924
2925         if (adapter->wd_active == 0)
2926                 return;
2927
2928         if (adapter->keep_alive_timeout == ENA_HW_HINTS_NO_TIMEOUT)
2929                 return;
2930
2931         timestamp = atomic_load_acq_64(&adapter->keep_alive_timestamp);
2932         time = getsbinuptime() - timestamp;
2933         if (unlikely(time > adapter->keep_alive_timeout)) {
2934                 ena_log(adapter->pdev, ERR, "Keep alive watchdog timeout.\n");
2935                 counter_u64_add(adapter->dev_stats.wd_expired, 1);
2936                 ena_trigger_reset(adapter, ENA_REGS_RESET_KEEP_ALIVE_TO);
2937         }
2938 }
2939
2940 /* Check if admin queue is enabled */
2941 static void
2942 check_for_admin_com_state(struct ena_adapter *adapter)
2943 {
2944         if (unlikely(ena_com_get_admin_running_state(adapter->ena_dev) == false)) {
2945                 ena_log(adapter->pdev, ERR,
2946                     "ENA admin queue is not in running state!\n");
2947                 counter_u64_add(adapter->dev_stats.admin_q_pause, 1);
2948                 ena_trigger_reset(adapter, ENA_REGS_RESET_ADMIN_TO);
2949         }
2950 }
2951
2952 static int
2953 check_for_rx_interrupt_queue(struct ena_adapter *adapter,
2954     struct ena_ring *rx_ring)
2955 {
2956         if (likely(atomic_load_8(&rx_ring->first_interrupt)))
2957                 return (0);
2958
2959         if (ena_com_cq_empty(rx_ring->ena_com_io_cq))
2960                 return (0);
2961
2962         rx_ring->no_interrupt_event_cnt++;
2963
2964         if (rx_ring->no_interrupt_event_cnt ==
2965             ENA_MAX_NO_INTERRUPT_ITERATIONS) {
2966                 ena_log(adapter->pdev, ERR,
2967                     "Potential MSIX issue on Rx side Queue = %d. Reset the device\n",
2968                     rx_ring->qid);
2969                 ena_trigger_reset(adapter, ENA_REGS_RESET_MISS_INTERRUPT);
2970                 return (EIO);
2971         }
2972
2973         return (0);
2974 }
2975
2976 static int
2977 check_missing_comp_in_tx_queue(struct ena_adapter *adapter,
2978     struct ena_ring *tx_ring)
2979 {
2980         device_t pdev = adapter->pdev;
2981         struct bintime curtime, time;
2982         struct ena_tx_buffer *tx_buf;
2983         int time_since_last_cleanup;
2984         int missing_tx_comp_to;
2985         sbintime_t time_offset;
2986         uint32_t missed_tx = 0;
2987         int i, rc = 0;
2988
2989         getbinuptime(&curtime);
2990
2991         for (i = 0; i < tx_ring->ring_size; i++) {
2992                 tx_buf = &tx_ring->tx_buffer_info[i];
2993
2994                 if (bintime_isset(&tx_buf->timestamp) == 0)
2995                         continue;
2996
2997                 time = curtime;
2998                 bintime_sub(&time, &tx_buf->timestamp);
2999                 time_offset = bttosbt(time);
3000
3001                 if (unlikely(!atomic_load_8(&tx_ring->first_interrupt) &&
3002                     time_offset > 2 * adapter->missing_tx_timeout)) {
3003                         /*
3004                          * If after graceful period interrupt is still not
3005                          * received, we schedule a reset.
3006                          */
3007                         ena_log(pdev, ERR,
3008                             "Potential MSIX issue on Tx side Queue = %d. "
3009                             "Reset the device\n",
3010                             tx_ring->qid);
3011                         ena_trigger_reset(adapter,
3012                             ENA_REGS_RESET_MISS_INTERRUPT);
3013                         return (EIO);
3014                 }
3015
3016                 /* Check again if packet is still waiting */
3017                 if (unlikely(time_offset > adapter->missing_tx_timeout)) {
3018
3019                         if (tx_buf->print_once) {
3020                                 time_since_last_cleanup = TICKS_2_USEC(ticks -
3021                                     tx_ring->tx_last_cleanup_ticks);
3022                                 missing_tx_comp_to = sbttoms(
3023                                     adapter->missing_tx_timeout);
3024                                 ena_log(pdev, WARN,
3025                                     "Found a Tx that wasn't completed on time, qid %d, index %d. "
3026                                     "%d usecs have passed since last cleanup. Missing Tx timeout value %d msecs.\n",
3027                                     tx_ring->qid, i, time_since_last_cleanup,
3028                                     missing_tx_comp_to);
3029                         }
3030
3031                         tx_buf->print_once = false;
3032                         missed_tx++;
3033                 }
3034         }
3035
3036         if (unlikely(missed_tx > adapter->missing_tx_threshold)) {
3037                 ena_log(pdev, ERR,
3038                     "The number of lost tx completion is above the threshold "
3039                     "(%d > %d). Reset the device\n",
3040                     missed_tx, adapter->missing_tx_threshold);
3041                 ena_trigger_reset(adapter, ENA_REGS_RESET_MISS_TX_CMPL);
3042                 rc = EIO;
3043         }
3044
3045         counter_u64_add(tx_ring->tx_stats.missing_tx_comp, missed_tx);
3046
3047         return (rc);
3048 }
3049
3050 /*
3051  * Check for TX which were not completed on time.
3052  * Timeout is defined by "missing_tx_timeout".
3053  * Reset will be performed if number of incompleted
3054  * transactions exceeds "missing_tx_threshold".
3055  */
3056 static void
3057 check_for_missing_completions(struct ena_adapter *adapter)
3058 {
3059         struct ena_ring *tx_ring;
3060         struct ena_ring *rx_ring;
3061         int i, budget, rc;
3062
3063         /* Make sure the driver doesn't turn the device in other process */
3064         rmb();
3065
3066         if (!ENA_FLAG_ISSET(ENA_FLAG_DEV_UP, adapter))
3067                 return;
3068
3069         if (ENA_FLAG_ISSET(ENA_FLAG_TRIGGER_RESET, adapter))
3070                 return;
3071
3072         if (adapter->missing_tx_timeout == ENA_HW_HINTS_NO_TIMEOUT)
3073                 return;
3074
3075         budget = adapter->missing_tx_max_queues;
3076
3077         for (i = adapter->next_monitored_tx_qid; i < adapter->num_io_queues; i++) {
3078                 tx_ring = &adapter->tx_ring[i];
3079                 rx_ring = &adapter->rx_ring[i];
3080
3081                 rc = check_missing_comp_in_tx_queue(adapter, tx_ring);
3082                 if (unlikely(rc != 0))
3083                         return;
3084
3085                 rc = check_for_rx_interrupt_queue(adapter, rx_ring);
3086                 if (unlikely(rc != 0))
3087                         return;
3088
3089                 budget--;
3090                 if (budget == 0) {
3091                         i++;
3092                         break;
3093                 }
3094         }
3095
3096         adapter->next_monitored_tx_qid = i % adapter->num_io_queues;
3097 }
3098
3099 /* trigger rx cleanup after 2 consecutive detections */
3100 #define EMPTY_RX_REFILL 2
3101 /* For the rare case where the device runs out of Rx descriptors and the
3102  * msix handler failed to refill new Rx descriptors (due to a lack of memory
3103  * for example).
3104  * This case will lead to a deadlock:
3105  * The device won't send interrupts since all the new Rx packets will be dropped
3106  * The msix handler won't allocate new Rx descriptors so the device won't be
3107  * able to send new packets.
3108  *
3109  * When such a situation is detected - execute rx cleanup task in another thread
3110  */
3111 static void
3112 check_for_empty_rx_ring(struct ena_adapter *adapter)
3113 {
3114         struct ena_ring *rx_ring;
3115         int i, refill_required;
3116
3117         if (!ENA_FLAG_ISSET(ENA_FLAG_DEV_UP, adapter))
3118                 return;
3119
3120         if (ENA_FLAG_ISSET(ENA_FLAG_TRIGGER_RESET, adapter))
3121                 return;
3122
3123         for (i = 0; i < adapter->num_io_queues; i++) {
3124                 rx_ring = &adapter->rx_ring[i];
3125
3126                 refill_required = ena_com_free_q_entries(
3127                     rx_ring->ena_com_io_sq);
3128                 if (unlikely(refill_required == (rx_ring->ring_size - 1))) {
3129                         rx_ring->empty_rx_queue++;
3130
3131                         if (rx_ring->empty_rx_queue >= EMPTY_RX_REFILL) {
3132                                 counter_u64_add(rx_ring->rx_stats.empty_rx_ring,
3133                                     1);
3134
3135                                 ena_log(adapter->pdev, WARN,
3136                                     "Rx ring %d is stalled. Triggering the refill function\n",
3137                                     i);
3138
3139                                 taskqueue_enqueue(rx_ring->que->cleanup_tq,
3140                                     &rx_ring->que->cleanup_task);
3141                                 rx_ring->empty_rx_queue = 0;
3142                         }
3143                 } else {
3144                         rx_ring->empty_rx_queue = 0;
3145                 }
3146         }
3147 }
3148
3149 static void
3150 ena_update_hints(struct ena_adapter *adapter,
3151     struct ena_admin_ena_hw_hints *hints)
3152 {
3153         struct ena_com_dev *ena_dev = adapter->ena_dev;
3154
3155         if (hints->admin_completion_tx_timeout)
3156                 ena_dev->admin_queue.completion_timeout =
3157                     hints->admin_completion_tx_timeout * 1000;
3158
3159         if (hints->mmio_read_timeout)
3160                 /* convert to usec */
3161                 ena_dev->mmio_read.reg_read_to = hints->mmio_read_timeout * 1000;
3162
3163         if (hints->missed_tx_completion_count_threshold_to_reset)
3164                 adapter->missing_tx_threshold =
3165                     hints->missed_tx_completion_count_threshold_to_reset;
3166
3167         if (hints->missing_tx_completion_timeout) {
3168                 if (hints->missing_tx_completion_timeout ==
3169                     ENA_HW_HINTS_NO_TIMEOUT)
3170                         adapter->missing_tx_timeout = ENA_HW_HINTS_NO_TIMEOUT;
3171                 else
3172                         adapter->missing_tx_timeout = SBT_1MS *
3173                             hints->missing_tx_completion_timeout;
3174         }
3175
3176         if (hints->driver_watchdog_timeout) {
3177                 if (hints->driver_watchdog_timeout == ENA_HW_HINTS_NO_TIMEOUT)
3178                         adapter->keep_alive_timeout = ENA_HW_HINTS_NO_TIMEOUT;
3179                 else
3180                         adapter->keep_alive_timeout = SBT_1MS *
3181                             hints->driver_watchdog_timeout;
3182         }
3183 }
3184
3185 /**
3186  * ena_copy_eni_metrics - Get and copy ENI metrics from the HW.
3187  * @adapter: ENA device adapter
3188  *
3189  * Returns 0 on success, EOPNOTSUPP if current HW doesn't support those metrics
3190  * and other error codes on failure.
3191  *
3192  * This function can possibly cause a race with other calls to the admin queue.
3193  * Because of that, the caller should either lock this function or make sure
3194  * that there is no race in the current context.
3195  */
3196 static int
3197 ena_copy_eni_metrics(struct ena_adapter *adapter)
3198 {
3199         static bool print_once = true;
3200         int rc;
3201
3202         rc = ena_com_get_eni_stats(adapter->ena_dev, &adapter->eni_metrics);
3203
3204         if (rc != 0) {
3205                 if (rc == ENA_COM_UNSUPPORTED) {
3206                         if (print_once) {
3207                                 ena_log(adapter->pdev, WARN,
3208                                     "Retrieving ENI metrics is not supported.\n");
3209                                 print_once = false;
3210                         } else {
3211                                 ena_log(adapter->pdev, DBG,
3212                                     "Retrieving ENI metrics is not supported.\n");
3213                         }
3214                 } else {
3215                         ena_log(adapter->pdev, ERR,
3216                             "Failed to get ENI metrics: %d\n", rc);
3217                 }
3218         }
3219
3220         return (rc);
3221 }
3222
3223 static void
3224 ena_timer_service(void *data)
3225 {
3226         struct ena_adapter *adapter = (struct ena_adapter *)data;
3227         struct ena_admin_host_info *host_info =
3228             adapter->ena_dev->host_attr.host_info;
3229
3230         check_for_missing_keep_alive(adapter);
3231
3232         check_for_admin_com_state(adapter);
3233
3234         check_for_missing_completions(adapter);
3235
3236         check_for_empty_rx_ring(adapter);
3237
3238         /*
3239          * User controller update of the ENI metrics.
3240          * If the delay was set to 0, then the stats shouldn't be updated at
3241          * all.
3242          * Otherwise, wait 'eni_metrics_sample_interval' seconds, before
3243          * updating stats.
3244          * As timer service is executed every second, it's enough to increment
3245          * appropriate counter each time the timer service is executed.
3246          */
3247         if ((adapter->eni_metrics_sample_interval != 0) &&
3248             (++adapter->eni_metrics_sample_interval_cnt >=
3249              adapter->eni_metrics_sample_interval)) {
3250                 taskqueue_enqueue(adapter->metrics_tq, &adapter->metrics_task);
3251                 adapter->eni_metrics_sample_interval_cnt = 0;
3252         }
3253
3254
3255         if (host_info != NULL)
3256                 ena_update_host_info(host_info, adapter->ifp);
3257
3258         if (unlikely(ENA_FLAG_ISSET(ENA_FLAG_TRIGGER_RESET, adapter))) {
3259                 /*
3260                  * Timeout when validating version indicates that the device
3261                  * became unresponsive. If that happens skip the reset and
3262                  * reschedule timer service, so the reset can be retried later.
3263                  */
3264                 if (ena_com_validate_version(adapter->ena_dev) ==
3265                     ENA_COM_TIMER_EXPIRED) {
3266                         ena_log(adapter->pdev, WARN,
3267                             "FW unresponsive, skipping reset\n");
3268                         ENA_TIMER_RESET(adapter);
3269                         return;
3270                 }
3271                 ena_log(adapter->pdev, WARN, "Trigger reset is on\n");
3272                 taskqueue_enqueue(adapter->reset_tq, &adapter->reset_task);
3273                 return;
3274         }
3275
3276         /*
3277          * Schedule another timeout one second from now.
3278          */
3279         ENA_TIMER_RESET(adapter);
3280 }
3281
3282 void
3283 ena_destroy_device(struct ena_adapter *adapter, bool graceful)
3284 {
3285         if_t ifp = adapter->ifp;
3286         struct ena_com_dev *ena_dev = adapter->ena_dev;
3287         bool dev_up;
3288
3289         if (!ENA_FLAG_ISSET(ENA_FLAG_DEVICE_RUNNING, adapter))
3290                 return;
3291
3292         if (!graceful)
3293                 if_link_state_change(ifp, LINK_STATE_DOWN);
3294
3295         ENA_TIMER_DRAIN(adapter);
3296
3297         dev_up = ENA_FLAG_ISSET(ENA_FLAG_DEV_UP, adapter);
3298         if (dev_up)
3299                 ENA_FLAG_SET_ATOMIC(ENA_FLAG_DEV_UP_BEFORE_RESET, adapter);
3300
3301         if (!graceful)
3302                 ena_com_set_admin_running_state(ena_dev, false);
3303
3304         if (ENA_FLAG_ISSET(ENA_FLAG_DEV_UP, adapter))
3305                 ena_down(adapter);
3306
3307         /*
3308          * Stop the device from sending AENQ events (if the device was up, and
3309          * the trigger reset was on, ena_down already performs device reset)
3310          */
3311         if (!(ENA_FLAG_ISSET(ENA_FLAG_TRIGGER_RESET, adapter) && dev_up))
3312                 ena_com_dev_reset(adapter->ena_dev, adapter->reset_reason);
3313
3314         ena_free_mgmnt_irq(adapter);
3315
3316         ena_disable_msix(adapter);
3317
3318         /*
3319          * IO rings resources should be freed because `ena_restore_device()`
3320          * calls (not directly) `ena_enable_msix()`, which re-allocates MSIX
3321          * vectors. The amount of MSIX vectors after destroy-restore may be
3322          * different than before. Therefore, IO rings resources should be
3323          * established from scratch each time.
3324          */
3325         ena_free_all_io_rings_resources(adapter);
3326
3327         ena_com_abort_admin_commands(ena_dev);
3328
3329         ena_com_wait_for_abort_completion(ena_dev);
3330
3331         ena_com_admin_destroy(ena_dev);
3332
3333         ena_com_mmio_reg_read_request_destroy(ena_dev);
3334
3335         adapter->reset_reason = ENA_REGS_RESET_NORMAL;
3336
3337         ENA_FLAG_CLEAR_ATOMIC(ENA_FLAG_TRIGGER_RESET, adapter);
3338         ENA_FLAG_CLEAR_ATOMIC(ENA_FLAG_DEVICE_RUNNING, adapter);
3339 }
3340
3341 static int
3342 ena_device_validate_params(struct ena_adapter *adapter,
3343     struct ena_com_dev_get_features_ctx *get_feat_ctx)
3344 {
3345         if (memcmp(get_feat_ctx->dev_attr.mac_addr, adapter->mac_addr,
3346             ETHER_ADDR_LEN) != 0) {
3347                 ena_log(adapter->pdev, ERR, "Error, mac addresses differ\n");
3348                 return (EINVAL);
3349         }
3350
3351         if (get_feat_ctx->dev_attr.max_mtu < if_getmtu(adapter->ifp)) {
3352                 ena_log(adapter->pdev, ERR,
3353                     "Error, device max mtu is smaller than ifp MTU\n");
3354                 return (EINVAL);
3355         }
3356
3357         return 0;
3358 }
3359
3360 int
3361 ena_restore_device(struct ena_adapter *adapter)
3362 {
3363         struct ena_com_dev_get_features_ctx get_feat_ctx;
3364         struct ena_com_dev *ena_dev = adapter->ena_dev;
3365         if_t ifp = adapter->ifp;
3366         device_t dev = adapter->pdev;
3367         int wd_active;
3368         int rc;
3369
3370         ENA_FLAG_SET_ATOMIC(ENA_FLAG_ONGOING_RESET, adapter);
3371
3372         rc = ena_device_init(adapter, dev, &get_feat_ctx, &wd_active);
3373         if (rc != 0) {
3374                 ena_log(dev, ERR, "Cannot initialize device\n");
3375                 goto err;
3376         }
3377         /*
3378          * Only enable WD if it was enabled before reset, so it won't override
3379          * value set by the user by the sysctl.
3380          */
3381         if (adapter->wd_active != 0)
3382                 adapter->wd_active = wd_active;
3383
3384         rc = ena_device_validate_params(adapter, &get_feat_ctx);
3385         if (rc != 0) {
3386                 ena_log(dev, ERR, "Validation of device parameters failed\n");
3387                 goto err_device_destroy;
3388         }
3389
3390         ENA_FLAG_CLEAR_ATOMIC(ENA_FLAG_ONGOING_RESET, adapter);
3391         /* Make sure we don't have a race with AENQ Links state handler */
3392         if (ENA_FLAG_ISSET(ENA_FLAG_LINK_UP, adapter))
3393                 if_link_state_change(ifp, LINK_STATE_UP);
3394
3395         rc = ena_enable_msix_and_set_admin_interrupts(adapter);
3396         if (rc != 0) {
3397                 ena_log(dev, ERR, "Enable MSI-X failed\n");
3398                 goto err_device_destroy;
3399         }
3400
3401         /*
3402          * Effective value of used MSIX vectors should be the same as before
3403          * `ena_destroy_device()`, if possible, or closest to it if less vectors
3404          * are available.
3405          */
3406         if ((adapter->msix_vecs - ENA_ADMIN_MSIX_VEC) < adapter->num_io_queues)
3407                 adapter->num_io_queues = adapter->msix_vecs - ENA_ADMIN_MSIX_VEC;
3408
3409         /* Re-initialize rings basic information */
3410         ena_init_io_rings(adapter);
3411
3412         /* If the interface was up before the reset bring it up */
3413         if (ENA_FLAG_ISSET(ENA_FLAG_DEV_UP_BEFORE_RESET, adapter)) {
3414                 rc = ena_up(adapter);
3415                 if (rc != 0) {
3416                         ena_log(dev, ERR, "Failed to create I/O queues\n");
3417                         goto err_disable_msix;
3418                 }
3419         }
3420
3421         /* Indicate that device is running again and ready to work */
3422         ENA_FLAG_SET_ATOMIC(ENA_FLAG_DEVICE_RUNNING, adapter);
3423
3424         /*
3425          * As the AENQ handlers weren't executed during reset because
3426          * the flag ENA_FLAG_DEVICE_RUNNING was turned off, the
3427          * timestamp must be updated again That will prevent next reset
3428          * caused by missing keep alive.
3429          */
3430         adapter->keep_alive_timestamp = getsbinuptime();
3431         ENA_TIMER_RESET(adapter);
3432
3433         ENA_FLAG_CLEAR_ATOMIC(ENA_FLAG_DEV_UP_BEFORE_RESET, adapter);
3434
3435         return (rc);
3436
3437 err_disable_msix:
3438         ena_free_mgmnt_irq(adapter);
3439         ena_disable_msix(adapter);
3440 err_device_destroy:
3441         ena_com_abort_admin_commands(ena_dev);
3442         ena_com_wait_for_abort_completion(ena_dev);
3443         ena_com_admin_destroy(ena_dev);
3444         ena_com_dev_reset(ena_dev, ENA_REGS_RESET_DRIVER_INVALID_STATE);
3445         ena_com_mmio_reg_read_request_destroy(ena_dev);
3446 err:
3447         ENA_FLAG_CLEAR_ATOMIC(ENA_FLAG_DEVICE_RUNNING, adapter);
3448         ENA_FLAG_CLEAR_ATOMIC(ENA_FLAG_ONGOING_RESET, adapter);
3449         ena_log(dev, ERR, "Reset attempt failed. Can not reset the device\n");
3450
3451         return (rc);
3452 }
3453
3454 static void
3455 ena_metrics_task(void *arg, int pending)
3456 {
3457         struct ena_adapter *adapter = (struct ena_adapter *)arg;
3458
3459         ENA_LOCK_LOCK();
3460         (void)ena_copy_eni_metrics(adapter);
3461         ENA_LOCK_UNLOCK();
3462 }
3463
3464 static void
3465 ena_reset_task(void *arg, int pending)
3466 {
3467         struct ena_adapter *adapter = (struct ena_adapter *)arg;
3468
3469         ENA_LOCK_LOCK();
3470         if (likely(ENA_FLAG_ISSET(ENA_FLAG_TRIGGER_RESET, adapter))) {
3471                 ena_destroy_device(adapter, false);
3472                 ena_restore_device(adapter);
3473
3474                 ena_log(adapter->pdev, INFO,
3475                     "Device reset completed successfully, Driver info: %s\n",
3476                     ena_version);
3477         }
3478         ENA_LOCK_UNLOCK();
3479 }
3480
3481 static void
3482 ena_free_stats(struct ena_adapter *adapter)
3483 {
3484         ena_free_counters((counter_u64_t *)&adapter->hw_stats,
3485             sizeof(struct ena_hw_stats));
3486         ena_free_counters((counter_u64_t *)&adapter->dev_stats,
3487             sizeof(struct ena_stats_dev));
3488
3489 }
3490 /**
3491  * ena_attach - Device Initialization Routine
3492  * @pdev: device information struct
3493  *
3494  * Returns 0 on success, otherwise on failure.
3495  *
3496  * ena_attach initializes an adapter identified by a device structure.
3497  * The OS initialization, configuring of the adapter private structure,
3498  * and a hardware reset occur.
3499  **/
3500 static int
3501 ena_attach(device_t pdev)
3502 {
3503         struct ena_com_dev_get_features_ctx get_feat_ctx;
3504         struct ena_calc_queue_size_ctx calc_queue_ctx = { 0 };
3505         static int version_printed;
3506         struct ena_adapter *adapter;
3507         struct ena_com_dev *ena_dev = NULL;
3508         uint32_t max_num_io_queues;
3509         int msix_rid;
3510         int rid, rc;
3511
3512         adapter = device_get_softc(pdev);
3513         adapter->pdev = pdev;
3514         adapter->first_bind = -1;
3515
3516         /*
3517          * Set up the timer service - driver is responsible for avoiding
3518          * concurrency, as the callout won't be using any locking inside.
3519          */
3520         ENA_TIMER_INIT(adapter);
3521         adapter->keep_alive_timeout = ENA_DEFAULT_KEEP_ALIVE_TO;
3522         adapter->missing_tx_timeout = ENA_DEFAULT_TX_CMP_TO;
3523         adapter->missing_tx_max_queues = ENA_DEFAULT_TX_MONITORED_QUEUES;
3524         adapter->missing_tx_threshold = ENA_DEFAULT_TX_CMP_THRESHOLD;
3525
3526         if (version_printed++ == 0)
3527                 ena_log(pdev, INFO, "%s\n", ena_version);
3528
3529         /* Allocate memory for ena_dev structure */
3530         ena_dev = malloc(sizeof(struct ena_com_dev), M_DEVBUF,
3531             M_WAITOK | M_ZERO);
3532
3533         adapter->ena_dev = ena_dev;
3534         ena_dev->dmadev = pdev;
3535
3536         rid = PCIR_BAR(ENA_REG_BAR);
3537         adapter->memory = NULL;
3538         adapter->registers = bus_alloc_resource_any(pdev, SYS_RES_MEMORY, &rid,
3539             RF_ACTIVE);
3540         if (unlikely(adapter->registers == NULL)) {
3541                 ena_log(pdev, ERR,
3542                     "unable to allocate bus resource: registers!\n");
3543                 rc = ENOMEM;
3544                 goto err_dev_free;
3545         }
3546
3547         /* MSIx vector table may reside on BAR0 with registers or on BAR1. */
3548         msix_rid = pci_msix_table_bar(pdev);
3549         if (msix_rid != rid) {
3550                 adapter->msix = bus_alloc_resource_any(pdev, SYS_RES_MEMORY,
3551                     &msix_rid, RF_ACTIVE);
3552                 if (unlikely(adapter->msix == NULL)) {
3553                         ena_log(pdev, ERR,
3554                             "unable to allocate bus resource: msix!\n");
3555                         rc = ENOMEM;
3556                         goto err_pci_free;
3557                 }
3558                 adapter->msix_rid = msix_rid;
3559         }
3560
3561         ena_dev->bus = malloc(sizeof(struct ena_bus), M_DEVBUF,
3562             M_WAITOK | M_ZERO);
3563
3564         /* Store register resources */
3565         ((struct ena_bus *)(ena_dev->bus))->reg_bar_t = rman_get_bustag(
3566             adapter->registers);
3567         ((struct ena_bus *)(ena_dev->bus))->reg_bar_h = rman_get_bushandle(
3568             adapter->registers);
3569
3570         if (unlikely(((struct ena_bus *)(ena_dev->bus))->reg_bar_h == 0)) {
3571                 ena_log(pdev, ERR, "failed to pmap registers bar\n");
3572                 rc = ENXIO;
3573                 goto err_bus_free;
3574         }
3575
3576         rc = ena_map_llq_mem_bar(pdev, ena_dev);
3577         if (unlikely(rc != 0)) {
3578                 ena_log(pdev, ERR, "Failed to map ENA mem bar");
3579                 goto err_bus_free;
3580         }
3581
3582         /* Initially clear all the flags */
3583         ENA_FLAG_ZERO(adapter);
3584
3585         /* Device initialization */
3586         rc = ena_device_init(adapter, pdev, &get_feat_ctx, &adapter->wd_active);
3587         if (unlikely(rc != 0)) {
3588                 ena_log(pdev, ERR, "ENA device init failed! (err: %d)\n", rc);
3589                 rc = ENXIO;
3590                 goto err_bus_free;
3591         }
3592
3593         if (ena_dev->tx_mem_queue_type == ENA_ADMIN_PLACEMENT_POLICY_DEV)
3594                 adapter->disable_meta_caching = !!(
3595                     get_feat_ctx.llq.accel_mode.u.get.supported_flags &
3596                     BIT(ENA_ADMIN_DISABLE_META_CACHING));
3597
3598         adapter->keep_alive_timestamp = getsbinuptime();
3599
3600         adapter->tx_offload_cap = get_feat_ctx.offload.tx;
3601
3602         memcpy(adapter->mac_addr, get_feat_ctx.dev_attr.mac_addr,
3603             ETHER_ADDR_LEN);
3604
3605         calc_queue_ctx.pdev = pdev;
3606         calc_queue_ctx.ena_dev = ena_dev;
3607         calc_queue_ctx.get_feat_ctx = &get_feat_ctx;
3608
3609         /* Calculate initial and maximum IO queue number and size */
3610         max_num_io_queues = ena_calc_max_io_queue_num(pdev, ena_dev,
3611             &get_feat_ctx);
3612         rc = ena_calc_io_queue_size(&calc_queue_ctx);
3613         if (unlikely((rc != 0) || (max_num_io_queues <= 0))) {
3614                 rc = EFAULT;
3615                 goto err_com_free;
3616         }
3617
3618         adapter->requested_tx_ring_size = calc_queue_ctx.tx_queue_size;
3619         adapter->requested_rx_ring_size = calc_queue_ctx.rx_queue_size;
3620         adapter->max_tx_ring_size = calc_queue_ctx.max_tx_queue_size;
3621         adapter->max_rx_ring_size = calc_queue_ctx.max_rx_queue_size;
3622         adapter->max_tx_sgl_size = calc_queue_ctx.max_tx_sgl_size;
3623         adapter->max_rx_sgl_size = calc_queue_ctx.max_rx_sgl_size;
3624
3625         adapter->max_num_io_queues = max_num_io_queues;
3626
3627         adapter->buf_ring_size = ENA_DEFAULT_BUF_RING_SIZE;
3628
3629         adapter->max_mtu = get_feat_ctx.dev_attr.max_mtu;
3630
3631         adapter->reset_reason = ENA_REGS_RESET_NORMAL;
3632
3633         /* set up dma tags for rx and tx buffers */
3634         rc = ena_setup_tx_dma_tag(adapter);
3635         if (unlikely(rc != 0)) {
3636                 ena_log(pdev, ERR, "Failed to create TX DMA tag\n");
3637                 goto err_com_free;
3638         }
3639
3640         rc = ena_setup_rx_dma_tag(adapter);
3641         if (unlikely(rc != 0)) {
3642                 ena_log(pdev, ERR, "Failed to create RX DMA tag\n");
3643                 goto err_tx_tag_free;
3644         }
3645
3646         /*
3647          * The amount of requested MSIX vectors is equal to
3648          * adapter::max_num_io_queues (see `ena_enable_msix()`), plus a constant
3649          * number of admin queue interrupts. The former is initially determined
3650          * by HW capabilities (see `ena_calc_max_io_queue_num())` but may not be
3651          * achieved if there are not enough system resources. By default, the
3652          * number of effectively used IO queues is the same but later on it can
3653          * be limited by the user using sysctl interface.
3654          */
3655         rc = ena_enable_msix_and_set_admin_interrupts(adapter);
3656         if (unlikely(rc != 0)) {
3657                 ena_log(pdev, ERR,
3658                     "Failed to enable and set the admin interrupts\n");
3659                 goto err_io_free;
3660         }
3661         /* By default all of allocated MSIX vectors are actively used */
3662         adapter->num_io_queues = adapter->msix_vecs - ENA_ADMIN_MSIX_VEC;
3663
3664         /* initialize rings basic information */
3665         ena_init_io_rings(adapter);
3666
3667         /* Initialize statistics */
3668         ena_alloc_counters((counter_u64_t *)&adapter->dev_stats,
3669             sizeof(struct ena_stats_dev));
3670         ena_alloc_counters((counter_u64_t *)&adapter->hw_stats,
3671             sizeof(struct ena_hw_stats));
3672         ena_sysctl_add_nodes(adapter);
3673
3674         /* setup network interface */
3675         rc = ena_setup_ifnet(pdev, adapter, &get_feat_ctx);
3676         if (unlikely(rc != 0)) {
3677                 ena_log(pdev, ERR, "Error with network interface setup\n");
3678                 goto err_msix_free;
3679         }
3680
3681         /* Initialize reset task queue */
3682         TASK_INIT(&adapter->reset_task, 0, ena_reset_task, adapter);
3683         adapter->reset_tq = taskqueue_create("ena_reset_enqueue",
3684             M_WAITOK | M_ZERO, taskqueue_thread_enqueue, &adapter->reset_tq);
3685         taskqueue_start_threads(&adapter->reset_tq, 1, PI_NET, "%s rstq",
3686             device_get_nameunit(adapter->pdev));
3687
3688         /* Initialize metrics task queue */
3689         TASK_INIT(&adapter->metrics_task, 0, ena_metrics_task, adapter);
3690         adapter->metrics_tq = taskqueue_create("ena_metrics_enqueue",
3691             M_WAITOK | M_ZERO, taskqueue_thread_enqueue, &adapter->metrics_tq);
3692         taskqueue_start_threads(&adapter->metrics_tq, 1, PI_NET, "%s metricsq",
3693             device_get_nameunit(adapter->pdev));
3694
3695 #ifdef DEV_NETMAP
3696         rc = ena_netmap_attach(adapter);
3697         if (rc != 0) {
3698                 ena_log(pdev, ERR, "netmap attach failed: %d\n", rc);
3699                 goto err_detach;
3700         }
3701 #endif /* DEV_NETMAP */
3702
3703         /* Tell the stack that the interface is not active */
3704         if_setdrvflagbits(adapter->ifp, IFF_DRV_OACTIVE, IFF_DRV_RUNNING);
3705         ENA_FLAG_SET_ATOMIC(ENA_FLAG_DEVICE_RUNNING, adapter);
3706
3707         /* Run the timer service */
3708         ENA_TIMER_RESET(adapter);
3709
3710         return (0);
3711
3712 #ifdef DEV_NETMAP
3713 err_detach:
3714         ether_ifdetach(adapter->ifp);
3715 #endif /* DEV_NETMAP */
3716 err_msix_free:
3717         ena_free_stats(adapter);
3718         ena_com_dev_reset(adapter->ena_dev, ENA_REGS_RESET_INIT_ERR);
3719         ena_free_mgmnt_irq(adapter);
3720         ena_disable_msix(adapter);
3721 err_io_free:
3722         ena_free_all_io_rings_resources(adapter);
3723         ena_free_rx_dma_tag(adapter);
3724 err_tx_tag_free:
3725         ena_free_tx_dma_tag(adapter);
3726 err_com_free:
3727         ena_com_admin_destroy(ena_dev);
3728         ena_com_delete_host_info(ena_dev);
3729         ena_com_mmio_reg_read_request_destroy(ena_dev);
3730 err_bus_free:
3731         free(ena_dev->bus, M_DEVBUF);
3732 err_pci_free:
3733         ena_free_pci_resources(adapter);
3734 err_dev_free:
3735         free(ena_dev, M_DEVBUF);
3736
3737         return (rc);
3738 }
3739
3740 /**
3741  * ena_detach - Device Removal Routine
3742  * @pdev: device information struct
3743  *
3744  * ena_detach is called by the device subsystem to alert the driver
3745  * that it should release a PCI device.
3746  **/
3747 static int
3748 ena_detach(device_t pdev)
3749 {
3750         struct ena_adapter *adapter = device_get_softc(pdev);
3751         struct ena_com_dev *ena_dev = adapter->ena_dev;
3752         int rc;
3753
3754         /* Make sure VLANS are not using driver */
3755         if (if_vlantrunkinuse(adapter->ifp)) {
3756                 ena_log(adapter->pdev, ERR, "VLAN is in use, detach first\n");
3757                 return (EBUSY);
3758         }
3759
3760         ether_ifdetach(adapter->ifp);
3761
3762         /* Stop timer service */
3763         ENA_LOCK_LOCK();
3764         ENA_TIMER_DRAIN(adapter);
3765         ENA_LOCK_UNLOCK();
3766
3767         /* Release metrics task */
3768         while (taskqueue_cancel(adapter->metrics_tq, &adapter->metrics_task, NULL))
3769                 taskqueue_drain(adapter->metrics_tq, &adapter->metrics_task);
3770         taskqueue_free(adapter->metrics_tq);
3771
3772         /* Release reset task */
3773         while (taskqueue_cancel(adapter->reset_tq, &adapter->reset_task, NULL))
3774                 taskqueue_drain(adapter->reset_tq, &adapter->reset_task);
3775         taskqueue_free(adapter->reset_tq);
3776
3777         ENA_LOCK_LOCK();
3778         ena_down(adapter);
3779         ena_destroy_device(adapter, true);
3780         ENA_LOCK_UNLOCK();
3781
3782         /* Restore unregistered sysctl queue nodes. */
3783         ena_sysctl_update_queue_node_nb(adapter, adapter->num_io_queues,
3784             adapter->max_num_io_queues);
3785
3786 #ifdef DEV_NETMAP
3787         netmap_detach(adapter->ifp);
3788 #endif /* DEV_NETMAP */
3789
3790         ena_free_stats(adapter);
3791
3792         rc = ena_free_rx_dma_tag(adapter);
3793         if (unlikely(rc != 0))
3794                 ena_log(adapter->pdev, WARN,
3795                     "Unmapped RX DMA tag associations\n");
3796
3797         rc = ena_free_tx_dma_tag(adapter);
3798         if (unlikely(rc != 0))
3799                 ena_log(adapter->pdev, WARN,
3800                     "Unmapped TX DMA tag associations\n");
3801
3802         ena_free_irqs(adapter);
3803
3804         ena_free_pci_resources(adapter);
3805
3806         if (adapter->rss_indir != NULL)
3807                 free(adapter->rss_indir, M_DEVBUF);
3808
3809         if (likely(ENA_FLAG_ISSET(ENA_FLAG_RSS_ACTIVE, adapter)))
3810                 ena_com_rss_destroy(ena_dev);
3811
3812         ena_com_delete_host_info(ena_dev);
3813
3814         if_free(adapter->ifp);
3815
3816         free(ena_dev->bus, M_DEVBUF);
3817
3818         free(ena_dev, M_DEVBUF);
3819
3820         return (bus_generic_detach(pdev));
3821 }
3822
3823 /******************************************************************************
3824  ******************************** AENQ Handlers *******************************
3825  *****************************************************************************/
3826 /**
3827  * ena_update_on_link_change:
3828  * Notify the network interface about the change in link status
3829  **/
3830 static void
3831 ena_update_on_link_change(void *adapter_data,
3832     struct ena_admin_aenq_entry *aenq_e)
3833 {
3834         struct ena_adapter *adapter = (struct ena_adapter *)adapter_data;
3835         struct ena_admin_aenq_link_change_desc *aenq_desc;
3836         int status;
3837         if_t ifp;
3838
3839         aenq_desc = (struct ena_admin_aenq_link_change_desc *)aenq_e;
3840         ifp = adapter->ifp;
3841         status = aenq_desc->flags &
3842             ENA_ADMIN_AENQ_LINK_CHANGE_DESC_LINK_STATUS_MASK;
3843
3844         if (status != 0) {
3845                 ena_log(adapter->pdev, INFO, "link is UP\n");
3846                 ENA_FLAG_SET_ATOMIC(ENA_FLAG_LINK_UP, adapter);
3847                 if (!ENA_FLAG_ISSET(ENA_FLAG_ONGOING_RESET, adapter))
3848                         if_link_state_change(ifp, LINK_STATE_UP);
3849         } else {
3850                 ena_log(adapter->pdev, INFO, "link is DOWN\n");
3851                 if_link_state_change(ifp, LINK_STATE_DOWN);
3852                 ENA_FLAG_CLEAR_ATOMIC(ENA_FLAG_LINK_UP, adapter);
3853         }
3854 }
3855
3856 static void
3857 ena_notification(void *adapter_data, struct ena_admin_aenq_entry *aenq_e)
3858 {
3859         struct ena_adapter *adapter = (struct ena_adapter *)adapter_data;
3860         struct ena_admin_ena_hw_hints *hints;
3861
3862         ENA_WARN(aenq_e->aenq_common_desc.group != ENA_ADMIN_NOTIFICATION,
3863             adapter->ena_dev, "Invalid group(%x) expected %x\n",
3864             aenq_e->aenq_common_desc.group, ENA_ADMIN_NOTIFICATION);
3865
3866         switch (aenq_e->aenq_common_desc.syndrome) {
3867         case ENA_ADMIN_UPDATE_HINTS:
3868                 hints =
3869                     (struct ena_admin_ena_hw_hints *)(&aenq_e->inline_data_w4);
3870                 ena_update_hints(adapter, hints);
3871                 break;
3872         default:
3873                 ena_log(adapter->pdev, ERR,
3874                     "Invalid aenq notification link state %d\n",
3875                     aenq_e->aenq_common_desc.syndrome);
3876         }
3877 }
3878
3879 static void
3880 ena_lock_init(void *arg)
3881 {
3882         ENA_LOCK_INIT();
3883 }
3884 SYSINIT(ena_lock_init, SI_SUB_LOCK, SI_ORDER_FIRST, ena_lock_init, NULL);
3885
3886 static void
3887 ena_lock_uninit(void *arg)
3888 {
3889         ENA_LOCK_DESTROY();
3890 }
3891 SYSUNINIT(ena_lock_uninit, SI_SUB_LOCK, SI_ORDER_FIRST, ena_lock_uninit, NULL);
3892
3893 /**
3894  * This handler will called for unknown event group or unimplemented handlers
3895  **/
3896 static void
3897 unimplemented_aenq_handler(void *adapter_data,
3898     struct ena_admin_aenq_entry *aenq_e)
3899 {
3900         struct ena_adapter *adapter = (struct ena_adapter *)adapter_data;
3901
3902         ena_log(adapter->pdev, ERR,
3903             "Unknown event was received or event with unimplemented handler\n");
3904 }
3905
3906 static struct ena_aenq_handlers aenq_handlers = {
3907     .handlers = {
3908             [ENA_ADMIN_LINK_CHANGE] = ena_update_on_link_change,
3909             [ENA_ADMIN_NOTIFICATION] = ena_notification,
3910             [ENA_ADMIN_KEEP_ALIVE] = ena_keep_alive_wd,
3911     },
3912     .unimplemented_handler = unimplemented_aenq_handler
3913 };
3914
3915 /*********************************************************************
3916  *  FreeBSD Device Interface Entry Points
3917  *********************************************************************/
3918
3919 static device_method_t ena_methods[] = { /* Device interface */
3920         DEVMETHOD(device_probe, ena_probe),
3921         DEVMETHOD(device_attach, ena_attach),
3922         DEVMETHOD(device_detach, ena_detach), DEVMETHOD_END
3923 };
3924
3925 static driver_t ena_driver = {
3926         "ena",
3927         ena_methods,
3928         sizeof(struct ena_adapter),
3929 };
3930
3931 DRIVER_MODULE(ena, pci, ena_driver, 0, 0);
3932 MODULE_PNP_INFO("U16:vendor;U16:device", pci, ena, ena_vendor_info_array,
3933     nitems(ena_vendor_info_array) - 1);
3934 MODULE_DEPEND(ena, pci, 1, 1, 1);
3935 MODULE_DEPEND(ena, ether, 1, 1, 1);
3936 #ifdef DEV_NETMAP
3937 MODULE_DEPEND(ena, netmap, 1, 1, 1);
3938 #endif /* DEV_NETMAP */
3939
3940 /*********************************************************************/