sys/dev/ena/ena.c

   1 /*-
   2  * BSD LICENSE
   3  *
   4  * Copyright (c) 2015-2017 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 __FBSDID("$FreeBSD$");
  32
  33 #include <sys/param.h>
  34 #include <sys/systm.h>
  35 #include <sys/bus.h>
  36 #include <sys/endian.h>
  37 #include <sys/kernel.h>
  38 #include <sys/kthread.h>
  39 #include <sys/malloc.h>
  40 #include <sys/mbuf.h>
  41 #include <sys/module.h>
  42 #include <sys/rman.h>
  43 #include <sys/smp.h>
  44 #include <sys/socket.h>
  45 #include <sys/sockio.h>
  46 #include <sys/sysctl.h>
  47 #include <sys/taskqueue.h>
  48 #include <sys/time.h>
  49 #include <sys/eventhandler.h>
  50
  51 #include <machine/bus.h>
  52 #include <machine/resource.h>
  53 #include <machine/in_cksum.h>
  54
  55 #include <net/bpf.h>
  56 #include <net/ethernet.h>
  57 #include <net/if.h>
  58 #include <net/if_var.h>
  59 #include <net/if_arp.h>
  60 #include <net/if_dl.h>
  61 #include <net/if_media.h>
  62 #include <net/rss_config.h>
  63 #include <net/if_types.h>
  64 #include <net/if_vlan_var.h>
  65
  66 #include <netinet/in_rss.h>
  67 #include <netinet/in_systm.h>
  68 #include <netinet/in.h>
  69 #include <netinet/if_ether.h>
  70 #include <netinet/ip.h>
  71 #include <netinet/ip6.h>
  72 #include <netinet/tcp.h>
  73 #include <netinet/udp.h>
  74
  75 #include <dev/pci/pcivar.h>
  76 #include <dev/pci/pcireg.h>
  77
  78 #include "ena.h"
  79 #include "ena_sysctl.h"
  80
  81 /*********************************************************
  82  *  Function prototypes
  83  *********************************************************/
  84 static int      ena_probe(device_t);
  85 static void     ena_intr_msix_mgmnt(void *);
  86 static int      ena_allocate_pci_resources(struct ena_adapter*);
  87 static void     ena_free_pci_resources(struct ena_adapter *);
  88 static int      ena_change_mtu(if_t, int);
  89 static inline void ena_alloc_counters(counter_u64_t *, int);
  90 static inline void ena_free_counters(counter_u64_t *, int);
  91 static inline void ena_reset_counters(counter_u64_t *, int);
  92 static void     ena_init_io_rings_common(struct ena_adapter *,
  93     struct ena_ring *, uint16_t);
  94 static int      ena_init_io_rings(struct ena_adapter *);
  95 static void     ena_free_io_ring_resources(struct ena_adapter *, unsigned int);
  96 static void     ena_free_all_io_rings_resources(struct ena_adapter *);
  97 static int      ena_setup_tx_dma_tag(struct ena_adapter *);
  98 static int      ena_free_tx_dma_tag(struct ena_adapter *);
  99 static int      ena_setup_rx_dma_tag(struct ena_adapter *);
 100 static int      ena_free_rx_dma_tag(struct ena_adapter *);
 101 static int      ena_setup_tx_resources(struct ena_adapter *, int);
 102 static void     ena_free_tx_resources(struct ena_adapter *, int);
 103 static int      ena_setup_all_tx_resources(struct ena_adapter *);
 104 static void     ena_free_all_tx_resources(struct ena_adapter *);
 105 static int      ena_setup_rx_resources(struct ena_adapter *, unsigned int);
 106 static void     ena_free_rx_resources(struct ena_adapter *, unsigned int);
 107 static int      ena_setup_all_rx_resources(struct ena_adapter *);
 108 static void     ena_free_all_rx_resources(struct ena_adapter *);
 109 static inline int ena_alloc_rx_mbuf(struct ena_adapter *, struct ena_ring *,
 110     struct ena_rx_buffer *);
 111 static void     ena_free_rx_mbuf(struct ena_adapter *, struct ena_ring *,
 112     struct ena_rx_buffer *);
 113 static int      ena_refill_rx_bufs(struct ena_ring *, uint32_t);
 114 static void     ena_free_rx_bufs(struct ena_adapter *, unsigned int);
 115 static void     ena_refill_all_rx_bufs(struct ena_adapter *);
 116 static void     ena_free_all_rx_bufs(struct ena_adapter *);
 117 static void     ena_free_tx_bufs(struct ena_adapter *, unsigned int);
 118 static void     ena_free_all_tx_bufs(struct ena_adapter *);
 119 static void     ena_destroy_all_tx_queues(struct ena_adapter *);
 120 static void     ena_destroy_all_rx_queues(struct ena_adapter *);
 121 static void     ena_destroy_all_io_queues(struct ena_adapter *);
 122 static int      ena_create_io_queues(struct ena_adapter *);
 123 static int      ena_tx_cleanup(struct ena_ring *);
 124 static int      ena_rx_cleanup(struct ena_ring *);
 125 static int      validate_tx_req_id(struct ena_ring *, uint16_t);
 126 static void     ena_rx_hash_mbuf(struct ena_ring *, struct ena_com_rx_ctx *,
 127     struct mbuf *);
 128 static struct mbuf* ena_rx_mbuf(struct ena_ring *, struct ena_com_rx_buf_info *,
 129     struct ena_com_rx_ctx *, uint16_t *);
 130 static inline void ena_rx_checksum(struct ena_ring *, struct ena_com_rx_ctx *,
 131     struct mbuf *);
 132 static void     ena_handle_msix(void *);
 133 static int      ena_enable_msix(struct ena_adapter *);
 134 static void     ena_setup_mgmnt_intr(struct ena_adapter *);
 135 static void     ena_setup_io_intr(struct ena_adapter *);
 136 static int      ena_request_mgmnt_irq(struct ena_adapter *);
 137 static int      ena_request_io_irq(struct ena_adapter *);
 138 static void     ena_free_mgmnt_irq(struct ena_adapter *);
 139 static void     ena_free_io_irq(struct ena_adapter *);
 140 static void     ena_free_irqs(struct ena_adapter*);
 141 static void     ena_disable_msix(struct ena_adapter *);
 142 static void     ena_unmask_all_io_irqs(struct ena_adapter *);
 143 static int      ena_rss_configure(struct ena_adapter *);
 144 static void     ena_update_hw_stats(void *, int);
 145 static int      ena_up_complete(struct ena_adapter *);
 146 static int      ena_up(struct ena_adapter *);
 147 static void     ena_down(struct ena_adapter *);
 148 static uint64_t ena_get_counter(if_t, ift_counter);
 149 static int      ena_media_change(if_t);
 150 static void     ena_media_status(if_t, struct ifmediareq *);
 151 static void     ena_init(void *);
 152 static int      ena_ioctl(if_t, u_long, caddr_t);
 153 static int      ena_get_dev_offloads(struct ena_com_dev_get_features_ctx *);
 154 static void     ena_update_host_info(struct ena_admin_host_info *, if_t);
 155 static void     ena_update_hwassist(struct ena_adapter *);
 156 static int      ena_setup_ifnet(device_t, struct ena_adapter *,
 157     struct ena_com_dev_get_features_ctx *);
 158 static void     ena_tx_csum(struct ena_com_tx_ctx *, struct mbuf *);
 159 static int      ena_xmit_mbuf(struct ena_ring *, struct mbuf **);
 160 static void     ena_start_xmit(struct ena_ring *);
 161 static int      ena_mq_start(if_t, struct mbuf *);
 162 static void     ena_deferred_mq_start(void *, int);
 163 static void     ena_qflush(if_t);
 164 static int      ena_calc_io_queue_num(struct ena_adapter *,
 165     struct ena_com_dev_get_features_ctx *);
 166 static int      ena_calc_queue_size(struct ena_adapter *, uint16_t *,
 167     uint16_t *, struct ena_com_dev_get_features_ctx *);
 168 static int      ena_rss_init_default(struct ena_adapter *);
 169 static void     ena_rss_init_default_deferred(void *);
 170 static void     ena_config_host_info(struct ena_com_dev *);
 171 static int      ena_attach(device_t);
 172 static int      ena_detach(device_t);
 173 static int      ena_device_init(struct ena_adapter *, device_t,
 174     struct ena_com_dev_get_features_ctx *, int *);
 175 static int      ena_enable_msix_and_set_admin_interrupts(struct ena_adapter *,
 176     int);
 177 static void ena_update_on_link_change(void *, struct ena_admin_aenq_entry *);
 178 static void     unimplemented_aenq_handler(void *,
 179     struct ena_admin_aenq_entry *);
 180 static void     ena_timer_service(void *);
 181
 182 static char ena_version[] = DEVICE_NAME DRV_MODULE_NAME " v" DRV_MODULE_VERSION;
 183
 184 static SYSCTL_NODE(_hw, OID_AUTO, ena, CTLFLAG_RD, 0, "ENA driver parameters");
 185
 186 /*
 187  * Tuneable number of buffers in the buf-ring (drbr)
 188  */
 189 static int ena_buf_ring_size = 4096;
 190 SYSCTL_INT(_hw_ena, OID_AUTO, buf_ring_size, CTLFLAG_RWTUN,
 191     &ena_buf_ring_size, 0, "Size of the bufring");
 192
 193
 194 static ena_vendor_info_t ena_vendor_info_array[] = {
 195     { PCI_VENDOR_ID_AMAZON, PCI_DEV_ID_ENA_PF, 0},
 196     { PCI_VENDOR_ID_AMAZON, PCI_DEV_ID_ENA_LLQ_PF, 0},
 197     { PCI_VENDOR_ID_AMAZON, PCI_DEV_ID_ENA_VF, 0},
 198     { PCI_VENDOR_ID_AMAZON, PCI_DEV_ID_ENA_LLQ_VF, 0},
 199     /* Last entry */
 200     { 0, 0, 0 }
 201 };
 202
 203 /*
 204  * Contains pointers to event handlers, e.g. link state chage.
 205  */
 206 static struct ena_aenq_handlers aenq_handlers;
 207
 208 void
 209 ena_dmamap_callback(void *arg, bus_dma_segment_t *segs, int nseg, int error)
 210 {
 211         if (error)
 212                 return;
 213         *(bus_addr_t *) arg = segs[0].ds_addr;
 214         return;
 215 }
 216
 217 int
 218 ena_dma_alloc(device_t dmadev, bus_size_t size,
 219     ena_mem_handle_t *dma , int mapflags)
 220 {
 221         struct ena_adapter* adapter = device_get_softc(dmadev);
 222         uint32_t maxsize = ((size - 1)/PAGE_SIZE + 1) * PAGE_SIZE;
 223         uint64_t dma_space_addr = ENA_DMA_BIT_MASK(adapter->dma_width);
 224         int error;
 225
 226         if (dma_space_addr == 0)
 227                 dma_space_addr = BUS_SPACE_MAXADDR;
 228         error = bus_dma_tag_create(bus_get_dma_tag(dmadev), /* parent */
 229             8, 0,             /* alignment, bounds */
 230             dma_space_addr,   /* lowaddr */
 231             dma_space_addr,   /* highaddr */
 232             NULL, NULL,       /* filter, filterarg */
 233             maxsize,          /* maxsize */
 234             1,                /* nsegments */
 235             maxsize,          /* maxsegsize */
 236             BUS_DMA_ALLOCNOW, /* flags */
 237             NULL,             /* lockfunc */
 238             NULL,             /* lockarg */
 239             &dma->tag);
 240         if (error) {
 241                 device_printf(dmadev,
 242                 "%s: bus_dma_tag_create failed: %d\n",
 243                 __func__, error);
 244                 goto fail_tag;
 245         }
 246
 247         error = bus_dmamem_alloc(dma->tag, (void**) &dma->vaddr,
 248             BUS_DMA_COHERENT | BUS_DMA_ZERO, &dma->map);
 249         if (error) {
 250                 device_printf(dmadev,
 251                 "%s: bus_dmamem_alloc(%ju) failed: %d\n",
 252                 __func__, (uintmax_t)size, error);
 253                 goto fail_map_create;
 254         }
 255
 256         dma->paddr = 0;
 257         error = bus_dmamap_load(dma->tag, dma->map, dma->vaddr,
 258             size, ena_dmamap_callback, &dma->paddr, mapflags);
 259         if (error || dma->paddr == 0) {
 260                 device_printf(dmadev,
 261                 "%s: bus_dmamap_load failed: %d\n",
 262                 __func__, error);
 263                 goto fail_map_load;
 264         }
 265
 266         return (0);
 267
 268 fail_map_load:
 269         bus_dmamap_unload(dma->tag, dma->map);
 270 fail_map_create:
 271         bus_dmamem_free(dma->tag, dma->vaddr, dma->map);
 272         bus_dma_tag_destroy(dma->tag);
 273 fail_tag:
 274         dma->tag = NULL;
 275
 276         return (error);
 277 }
 278
 279 static int
 280 ena_allocate_pci_resources(struct ena_adapter* adapter)
 281 {
 282         device_t pdev = adapter->pdev;
 283         int rid;
 284
 285         rid = PCIR_BAR(ENA_REG_BAR);
 286         adapter->memory = NULL;
 287         adapter->registers = bus_alloc_resource_any(pdev, SYS_RES_MEMORY,
 288             &rid, RF_ACTIVE);
 289         if (adapter->registers == NULL) {
 290                 device_printf(pdev, "Unable to allocate bus resource: "
 291                     "registers\n");
 292                 return (ENXIO);
 293         }
 294
 295         return (0);
 296 }
 297
 298 static void
 299 ena_free_pci_resources(struct ena_adapter *adapter)
 300 {
 301         device_t pdev = adapter->pdev;
 302
 303         if (adapter->memory != NULL) {
 304                 bus_release_resource(pdev, SYS_RES_MEMORY,
 305                     PCIR_BAR(ENA_MEM_BAR), adapter->memory);
 306         }
 307
 308         if (adapter->registers != NULL) {
 309                 bus_release_resource(pdev, SYS_RES_MEMORY,
 310                     PCIR_BAR(ENA_REG_BAR), adapter->registers);
 311         }
 312
 313         return;
 314 }
 315
 316 static int
 317 ena_probe(device_t dev)
 318 {
 319         ena_vendor_info_t *ent;
 320         char            adapter_name[60];
 321         uint16_t        pci_vendor_id = 0;
 322         uint16_t        pci_device_id = 0;
 323
 324         pci_vendor_id = pci_get_vendor(dev);
 325         pci_device_id = pci_get_device(dev);
 326
 327         ent = ena_vendor_info_array;
 328         while (ent->vendor_id != 0) {
 329                 if ((pci_vendor_id == ent->vendor_id) &&
 330                     (pci_device_id == ent->device_id)) {
 331                         ena_trace(ENA_DBG, "vendor=%x device=%x ",
 332                             pci_vendor_id, pci_device_id);
 333
 334                         sprintf(adapter_name, DEVICE_DESC);
 335                         device_set_desc_copy(dev, adapter_name);
 336                         return (BUS_PROBE_DEFAULT);
 337                 }
 338
 339                 ent++;
 340
 341         }
 342
 343         return (ENXIO);
 344 }
 345
 346 static int
 347 ena_change_mtu(if_t ifp, int new_mtu)
 348 {
 349         struct ena_adapter *adapter = if_getsoftc(ifp);
 350         struct ena_com_dev_get_features_ctx get_feat_ctx;
 351         int rc, old_mtu, max_frame;
 352
 353         rc = ena_com_get_dev_attr_feat(adapter->ena_dev, &get_feat_ctx);
 354         if (rc) {
 355                 device_printf(adapter->pdev,
 356                     "Cannot get attribute for ena device\n");
 357                 return (ENXIO);
 358         }
 359
 360         /* Save old MTU in case of fail */
 361         old_mtu = if_getmtu(ifp);
 362
 363         /* Change MTU and calculate max frame */
 364         if_setmtu(ifp, new_mtu);
 365         max_frame = ETHER_MAX_FRAME(ifp, ETHERTYPE_VLAN, 1);
 366
 367         if ((new_mtu < ENA_MIN_FRAME_LEN) ||
 368             (new_mtu > get_feat_ctx.dev_attr.max_mtu) ||
 369             (max_frame > ENA_MAX_FRAME_LEN)) {
 370                 device_printf(adapter->pdev, "Invalid MTU setting. "
 371                     "new_mtu: %d\n", new_mtu);
 372                 goto error;
 373         }
 374
 375         rc = ena_com_set_dev_mtu(adapter->ena_dev, new_mtu);
 376         if (rc != 0)
 377                 goto error;
 378
 379         return (0);
 380 error:
 381         if_setmtu(ifp, old_mtu);
 382         return (EINVAL);
 383 }
 384
 385 static inline void
 386 ena_alloc_counters(counter_u64_t *begin, int size)
 387 {
 388         counter_u64_t *end = (counter_u64_t *)((char *)begin + size);
 389
 390         for (; begin < end; ++begin)
 391                 *begin = counter_u64_alloc(M_WAITOK);
 392 }
 393
 394 static inline void
 395 ena_free_counters(counter_u64_t *begin, int size)
 396 {
 397         counter_u64_t *end = (counter_u64_t *)((char *)begin + size);
 398
 399         for (; begin < end; ++begin)
 400                 counter_u64_free(*begin);
 401 }
 402
 403 static inline void
 404 ena_reset_counters(counter_u64_t *begin, int size)
 405 {
 406         counter_u64_t *end = (counter_u64_t *)((char *)begin + size);
 407
 408         for (; begin < end; ++begin)
 409                 counter_u64_zero(*begin);
 410 }
 411
 412 static void
 413 ena_init_io_rings_common(struct ena_adapter *adapter, struct ena_ring *ring,
 414     uint16_t qid)
 415 {
 416
 417         ring->qid = qid;
 418         ring->adapter = adapter;
 419         ring->ena_dev = adapter->ena_dev;
 420 }
 421
 422 static int
 423 ena_init_io_rings(struct ena_adapter *adapter)
 424 {
 425         struct ena_com_dev *ena_dev;
 426         struct ena_ring *txr, *rxr;
 427         struct ena_que *que;
 428         int i;
 429         int rc;
 430
 431         ena_dev = adapter->ena_dev;
 432
 433         for (i = 0; i < adapter->num_queues; i++) {
 434                 txr = &adapter->tx_ring[i];
 435                 rxr = &adapter->rx_ring[i];
 436
 437                 /* TX/RX common ring state */
 438                 ena_init_io_rings_common(adapter, txr, i);
 439                 ena_init_io_rings_common(adapter, rxr, i);
 440
 441                 /* TX specific ring state */
 442                 txr->ring_size = adapter->tx_ring_size;
 443                 txr->tx_max_header_size = ena_dev->tx_max_header_size;
 444                 txr->tx_mem_queue_type = ena_dev->tx_mem_queue_type;
 445                 txr->smoothed_interval =
 446                     ena_com_get_nonadaptive_moderation_interval_tx(ena_dev);
 447
 448                 /* Allocate a buf ring */
 449                 txr->br = buf_ring_alloc(ena_buf_ring_size, M_DEVBUF,
 450                     M_WAITOK, &txr->ring_mtx);
 451                 if (txr->br == NULL) {
 452                         device_printf(adapter->pdev,
 453                             "Error while setting up bufring\n");
 454                         rc = ENOMEM;
 455                         goto err_bufr_free;
 456                 }
 457
 458                 /* Alloc TX statistics. */
 459                 ena_alloc_counters((counter_u64_t *)&txr->tx_stats,
 460                     sizeof(txr->tx_stats));
 461
 462                 /* RX specific ring state */
 463                 rxr->ring_size = adapter->rx_ring_size;
 464                 rxr->rx_small_copy_len = adapter->small_copy_len;
 465                 rxr->smoothed_interval =
 466                     ena_com_get_nonadaptive_moderation_interval_rx(ena_dev);
 467
 468                 /* Alloc RX statistics. */
 469                 ena_alloc_counters((counter_u64_t *)&rxr->rx_stats,
 470                     sizeof(rxr->rx_stats));
 471
 472                 /* Initialize locks */
 473                 snprintf(txr->mtx_name, nitems(txr->mtx_name), "%s:tx(%d)",
 474                     device_get_nameunit(adapter->pdev), i);
 475                 snprintf(rxr->mtx_name, nitems(rxr->mtx_name), "%s:rx(%d)",
 476                     device_get_nameunit(adapter->pdev), i);
 477
 478                 mtx_init(&txr->ring_mtx, txr->mtx_name, NULL, MTX_DEF);
 479                 mtx_init(&rxr->ring_mtx, rxr->mtx_name, NULL, MTX_DEF);
 480
 481                 que = &adapter->que[i];
 482                 que->adapter = adapter;
 483                 que->id = i;
 484                 que->tx_ring = txr;
 485                 que->rx_ring = rxr;
 486
 487                 txr->que = que;
 488                 rxr->que = que;
 489         }
 490
 491         return 0;
 492
 493 err_bufr_free:
 494         while (i--)
 495                 ena_free_io_ring_resources(adapter, i);
 496
 497         return (rc);
 498 }
 499
 500 static void
 501 ena_free_io_ring_resources(struct ena_adapter *adapter, unsigned int qid)
 502 {
 503         struct ena_ring *txr = &adapter->tx_ring[qid];
 504         struct ena_ring *rxr = &adapter->rx_ring[qid];
 505
 506         ena_free_counters((counter_u64_t *)&txr->tx_stats,
 507             sizeof(txr->tx_stats));
 508         ena_free_counters((counter_u64_t *)&rxr->rx_stats,
 509             sizeof(rxr->rx_stats));
 510
 511         mtx_destroy(&txr->ring_mtx);
 512         mtx_destroy(&rxr->ring_mtx);
 513
 514         drbr_free(txr->br, M_DEVBUF);
 515
 516 }
 517
 518 static void
 519 ena_free_all_io_rings_resources(struct ena_adapter *adapter)
 520 {
 521         int i;
 522
 523         for (i = 0; i < adapter->num_queues; i++)
 524                 ena_free_io_ring_resources(adapter, i);
 525
 526 }
 527
 528 static int
 529 ena_setup_tx_dma_tag(struct ena_adapter *adapter)
 530 {
 531         int ret;
 532
 533         /* Create DMA tag for Tx buffers */
 534         ret = bus_dma_tag_create(bus_get_dma_tag(adapter->pdev),
 535             1, 0,                                 /* alignment, bounds  */
 536             ENA_DMA_BIT_MASK(adapter->dma_width), /* lowaddr            */
 537             ENA_DMA_BIT_MASK(adapter->dma_width), /* highaddr           */
 538             NULL, NULL,                           /* filter, filterarg  */
 539             ENA_TSO_MAXSIZE,                      /* maxsize            */
 540             adapter->max_tx_sgl_size,             /* nsegments          */
 541             ENA_TSO_MAXSIZE,                      /* maxsegsize         */
 542             0,                                    /* flags              */
 543             NULL,                                 /* lockfunc           */
 544             NULL,                                 /* lockfuncarg        */
 545             &adapter->tx_buf_tag);
 546
 547         if (ret != 0)
 548                 device_printf(adapter->pdev, "Unable to create Tx DMA tag\n");
 549
 550         return (ret);
 551 }
 552
 553 static int
 554 ena_free_tx_dma_tag(struct ena_adapter *adapter)
 555 {
 556         int ret;
 557
 558         ret = bus_dma_tag_destroy(adapter->tx_buf_tag);
 559
 560         if (ret == 0)
 561                 adapter->tx_buf_tag = NULL;
 562
 563         return (ret);
 564 }
 565
 566 static int
 567 ena_setup_rx_dma_tag(struct ena_adapter *adapter)
 568 {
 569         int ret;
 570
 571         /* Create DMA tag for Rx buffers*/
 572         ret = bus_dma_tag_create(bus_get_dma_tag(adapter->pdev), /* parent */
 573             1, 0,                                 /* alignment, bounds  */
 574             ENA_DMA_BIT_MASK(adapter->dma_width), /* lowaddr            */
 575             ENA_DMA_BIT_MASK(adapter->dma_width), /* highaddr           */
 576             NULL, NULL,                           /* filter, filterarg  */
 577             MJUM16BYTES,                          /* maxsize            */
 578             1,                                    /* nsegments          */
 579             MJUM16BYTES,                          /* maxsegsize         */
 580             0,                                    /* flags              */
 581             NULL,                                 /* lockfunc           */
 582             NULL,                                 /* lockarg            */
 583             &adapter->rx_buf_tag);
 584
 585         if (ret != 0)
 586                 device_printf(adapter->pdev, "Unable to create Rx DMA tag\n");
 587
 588         return (ret);
 589 }
 590
 591 static int
 592 ena_free_rx_dma_tag(struct ena_adapter *adapter)
 593 {
 594         int ret;
 595
 596         ret = bus_dma_tag_destroy(adapter->rx_buf_tag);
 597
 598         if (ret == 0)
 599                 adapter->rx_buf_tag = NULL;
 600
 601         return (ret);
 602 }
 603
 604
 605 /**
 606  * ena_setup_tx_resources - allocate Tx resources (Descriptors)
 607  * @adapter: network interface device structure
 608  * @qid: queue index
 609  *
 610  * Returns 0 on success, otherwise on failure.
 611  **/
 612 static int
 613 ena_setup_tx_resources(struct ena_adapter *adapter, int qid)
 614 {
 615         struct ena_que *que = &adapter->que[qid];
 616         struct ena_ring *tx_ring = que->tx_ring;
 617         int size, i, err;
 618 #ifdef  RSS
 619         cpuset_t cpu_mask;
 620 #endif
 621
 622         size = sizeof(struct ena_tx_buffer) * tx_ring->ring_size;
 623
 624         tx_ring->tx_buffer_info = malloc(size, M_DEVBUF, M_NOWAIT | M_ZERO);
 625         if (!tx_ring->tx_buffer_info)
 626                 goto err_tx_buffer_info;
 627
 628         size = sizeof(uint16_t) * tx_ring->ring_size;
 629         tx_ring->free_tx_ids = malloc(size, M_DEVBUF, M_NOWAIT | M_ZERO);
 630         if (!tx_ring->free_tx_ids)
 631                 goto err_tx_reqs;
 632
 633         /* Req id stack for TX OOO completions */
 634         for (i = 0; i < tx_ring->ring_size; i++)
 635                 tx_ring->free_tx_ids[i] = i;
 636
 637         /* Reset TX statistics. */
 638         ena_reset_counters((counter_u64_t *)&tx_ring->tx_stats,
 639             sizeof(tx_ring->tx_stats));
 640
 641         tx_ring->next_to_use = 0;
 642         tx_ring->next_to_clean = 0;
 643
 644         /* Make sure that drbr is empty */
 645         drbr_flush(adapter->ifp, tx_ring->br);
 646
 647         /* ... and create the buffer DMA maps */
 648         for (i = 0; i < tx_ring->ring_size; i++) {
 649                 err = bus_dmamap_create(adapter->tx_buf_tag, 0,
 650                     &tx_ring->tx_buffer_info[i].map);
 651                 if (err != 0) {
 652                         device_printf(adapter->pdev,
 653                             "Unable to create Tx DMA map for buffer %d\n", i);
 654                         goto err_tx_map;
 655                 }
 656         }
 657
 658         /* Allocate taskqueues */
 659         TASK_INIT(&tx_ring->enqueue_task, 0, ena_deferred_mq_start, tx_ring);
 660         tx_ring->enqueue_tq = taskqueue_create_fast("ena_tx_enque", M_NOWAIT,
 661             taskqueue_thread_enqueue, &tx_ring->enqueue_tq);
 662         if (tx_ring->enqueue_tq == NULL) {
 663                 device_printf(adapter->pdev,
 664                     "Unable to create taskqueue for enqueue task\n");
 665                 i = tx_ring->ring_size;
 666                 goto err_tx_map;
 667         }
 668
 669         /* RSS set cpu for thread */
 670 #ifdef RSS
 671         CPU_SETOF(que->cpu, &cpu_mask);
 672         taskqueue_start_threads_cpuset(&tx_ring->enqueue_tq, 1, PI_NET,
 673             &cpu_mask, "%s tx_ring enq (bucket %d)",
 674             device_get_nameunit(adapter->pdev), que->cpu);
 675 #else /* RSS */
 676         taskqueue_start_threads(&tx_ring->enqueue_tq, 1, PI_NET,
 677             "%s txeq %d", device_get_nameunit(adapter->pdev), que->cpu);
 678 #endif /* RSS */
 679
 680         return (0);
 681
 682 err_tx_map:
 683         while (i--) {
 684                 bus_dmamap_destroy(adapter->tx_buf_tag,
 685                     tx_ring->tx_buffer_info[i].map);
 686         }
 687         ENA_MEM_FREE(adapter->ena_dev->dmadev, tx_ring->free_tx_ids);
 688 err_tx_reqs:
 689         ENA_MEM_FREE(adapter->ena_dev->dmadev, tx_ring->tx_buffer_info);
 690 err_tx_buffer_info:
 691         return (ENOMEM);
 692 }
 693
 694 /**
 695  * ena_free_tx_resources - Free Tx Resources per Queue
 696  * @adapter: network interface device structure
 697  * @qid: queue index
 698  *
 699  * Free all transmit software resources
 700  **/
 701 static void
 702 ena_free_tx_resources(struct ena_adapter *adapter, int qid)
 703 {
 704         struct ena_ring *tx_ring = &adapter->tx_ring[qid];
 705
 706         while (taskqueue_cancel(tx_ring->enqueue_tq, &tx_ring->enqueue_task,
 707             NULL))
 708                 taskqueue_drain(tx_ring->enqueue_tq, &tx_ring->enqueue_task);
 709
 710         taskqueue_free(tx_ring->enqueue_tq);
 711
 712         /* Flush buffer ring, */
 713         drbr_flush(adapter->ifp, tx_ring->br);
 714
 715         /* Free buffer DMA maps, */
 716         ENA_RING_MTX_LOCK(tx_ring);
 717         for (int i = 0; i < tx_ring->ring_size; i++) {
 718                 m_freem(tx_ring->tx_buffer_info[i].mbuf);
 719                 tx_ring->tx_buffer_info[i].mbuf = NULL;
 720                 bus_dmamap_unload(adapter->tx_buf_tag,
 721                     tx_ring->tx_buffer_info[i].map);
 722                 bus_dmamap_destroy(adapter->tx_buf_tag,
 723                     tx_ring->tx_buffer_info[i].map);
 724         }
 725         ENA_RING_MTX_UNLOCK(tx_ring);
 726
 727         /* And free allocated memory. */
 728         ENA_MEM_FREE(adapter->ena_dev->dmadev, tx_ring->tx_buffer_info);
 729         tx_ring->tx_buffer_info = NULL;
 730
 731         ENA_MEM_FREE(adapter->ena_dev->dmadev, tx_ring->free_tx_ids);
 732         tx_ring->free_tx_ids = NULL;
 733 }
 734
 735 /**
 736  * ena_setup_all_tx_resources - allocate all queues Tx resources
 737  * @adapter: network interface device structure
 738  *
 739  * Returns 0 on success, otherwise on failure.
 740  **/
 741 static int
 742 ena_setup_all_tx_resources(struct ena_adapter *adapter)
 743 {
 744         int i, rc;
 745
 746         for (i = 0; i < adapter->num_queues; i++) {
 747                 rc = ena_setup_tx_resources(adapter, i);
 748                 if (!rc)
 749                         continue;
 750
 751                 device_printf(adapter->pdev,
 752                     "Allocation for Tx Queue %u failed\n", i);
 753                 goto err_setup_tx;
 754         }
 755
 756         return (0);
 757
 758 err_setup_tx:
 759         /* Rewind the index freeing the rings as we go */
 760         while (i--)
 761                 ena_free_tx_resources(adapter, i);
 762         return (rc);
 763 }
 764
 765 /**
 766  * ena_free_all_tx_resources - Free Tx Resources for All Queues
 767  * @adapter: network interface device structure
 768  *
 769  * Free all transmit software resources
 770  **/
 771 static void
 772 ena_free_all_tx_resources(struct ena_adapter *adapter)
 773 {
 774         int i;
 775
 776         for (i = 0; i < adapter->num_queues; i++)
 777                 ena_free_tx_resources(adapter, i);
 778
 779         return;
 780 }
 781
 782 /**
 783  * ena_setup_rx_resources - allocate Rx resources (Descriptors)
 784  * @adapter: network interface device structure
 785  * @qid: queue index
 786  *
 787  * Returns 0 on success, otherwise on failure.
 788  **/
 789 static int
 790 ena_setup_rx_resources(struct ena_adapter *adapter, unsigned int qid)
 791 {
 792         struct ena_que *que = &adapter->que[qid];
 793         struct ena_ring *rx_ring = que->rx_ring;
 794         int size, err, i;
 795 #ifdef  RSS
 796         cpuset_t cpu_mask;
 797 #endif
 798
 799         size = sizeof(struct ena_rx_buffer) * rx_ring->ring_size;
 800
 801         /*
 802          * Alloc extra element so in rx path
 803          * we can always prefetch rx_info + 1
 804          */
 805         size += sizeof(struct ena_rx_buffer);
 806
 807         rx_ring->rx_buffer_info = ENA_MEM_ALLOC(adapter->ena_dev->dmadev, size);
 808         if (!rx_ring->rx_buffer_info)
 809                 return (ENOMEM);
 810
 811         /* Reset RX statistics. */
 812         ena_reset_counters((counter_u64_t *)&rx_ring->rx_stats,
 813             sizeof(rx_ring->rx_stats));
 814
 815         rx_ring->next_to_clean = 0;
 816         rx_ring->next_to_use = 0;
 817
 818         /* ... and create the buffer DMA maps */
 819         for (i = 0; i < rx_ring->ring_size; i++) {
 820                 err = bus_dmamap_create(adapter->rx_buf_tag, 0,
 821                     &(rx_ring->rx_buffer_info[i].map));
 822                 if (err != 0) {
 823                         device_printf(adapter->pdev,
 824                             "Unable to create Rx DMA map for buffer %d\n", i);
 825                         goto err_rx_dma;
 826                 }
 827         }
 828
 829         /* Create LRO for the ring */
 830         if (adapter->ifp->if_capenable & IFCAP_LRO) {
 831                 int err = tcp_lro_init(&rx_ring->lro);
 832                 if (err) {
 833                         device_printf(adapter->pdev,
 834                             "LRO[%d] Initialization failed!\n", qid);
 835                 } else {
 836                         ena_trace(ENA_INFO,
 837                             "RX Soft LRO[%d] Initialized\n", qid);
 838                         rx_ring->lro.ifp = adapter->ifp;
 839                 }
 840         }
 841
 842         return (0);
 843
 844 err_rx_dma:
 845         while (i--) {
 846                 bus_dmamap_destroy(adapter->rx_buf_tag,
 847                     rx_ring->rx_buffer_info[i].map);
 848         }
 849
 850         ENA_MEM_FREE(adapter->ena_dev->dmadev, rx_ring->rx_buffer_info);
 851         rx_ring->rx_buffer_info = NULL;
 852         ena_trace(ENA_ALERT, "RX resource allocation fail");
 853         return (ENOMEM);
 854 }
 855
 856 /**
 857  * ena_free_rx_resources - Free Rx Resources
 858  * @adapter: network interface device structure
 859  * @qid: queue index
 860  *
 861  * Free all receive software resources
 862  **/
 863 static void
 864 ena_free_rx_resources(struct ena_adapter *adapter, unsigned int qid)
 865 {
 866         struct ena_ring *rx_ring = &adapter->rx_ring[qid];
 867
 868         ena_trace(ENA_INFO, "%s qid %d\n", __func__, qid);
 869
 870         /* Free buffer DMA maps, */
 871         for (int i = 0; i < rx_ring->ring_size; i++) {
 872                 m_freem(rx_ring->rx_buffer_info[i].mbuf);
 873                 rx_ring->rx_buffer_info[i].mbuf = NULL;
 874                 bus_dmamap_unload(adapter->rx_buf_tag,
 875                     rx_ring->rx_buffer_info[i].map);
 876                 bus_dmamap_destroy(adapter->rx_buf_tag,
 877                     rx_ring->rx_buffer_info[i].map);
 878         }
 879
 880         /* free LRO resources, */
 881         tcp_lro_free(&rx_ring->lro);
 882
 883         /* free allocated memory */
 884         ENA_MEM_FREE(adapter->ena_dev->dmadev, rx_ring->rx_buffer_info);
 885         rx_ring->rx_buffer_info = NULL;
 886
 887         return;
 888 }
 889
 890 /**
 891  * ena_setup_all_rx_resources - allocate all queues Rx resources
 892  * @adapter: network interface device structure
 893  *
 894  * Returns 0 on success, otherwise on failure.
 895  **/
 896 static int
 897 ena_setup_all_rx_resources(struct ena_adapter *adapter)
 898 {
 899         int i, rc = 0;
 900
 901         for (i = 0; i < adapter->num_queues; i++) {
 902                 rc = ena_setup_rx_resources(adapter, i);
 903                 if (!rc)
 904                         continue;
 905
 906                 device_printf(adapter->pdev,
 907                     "Allocation for Rx Queue %u failed\n", i);
 908                 goto err_setup_rx;
 909         }
 910         return (0);
 911
 912 err_setup_rx:
 913         /* rewind the index freeing the rings as we go */
 914         while (i--)
 915                 ena_free_rx_resources(adapter, i);
 916         return (rc);
 917 }
 918
 919 /**
 920  * ena_free_all_rx_resources - Free Rx resources for all queues
 921  * @adapter: network interface device structure
 922  *
 923  * Free all receive software resources
 924  **/
 925 static void
 926 ena_free_all_rx_resources(struct ena_adapter *adapter)
 927 {
 928         int i;
 929
 930         for (i = 0; i < adapter->num_queues; i++)
 931                 ena_free_rx_resources(adapter, i);
 932
 933         return;
 934 }
 935
 936 static inline int
 937 ena_alloc_rx_mbuf(struct ena_adapter *adapter,
 938     struct ena_ring *rx_ring, struct ena_rx_buffer *rx_info)
 939 {
 940         struct ena_com_buf *ena_buf;
 941         bus_dma_segment_t segs[1];
 942         int nsegs, error;
 943
 944         /* if previous allocated frag is not used */
 945         if (rx_info->mbuf != NULL)
 946                 return (0);
 947
 948         ENA_RING_MTX_LOCK(rx_ring);
 949         /* Get mbuf using UMA allocator */
 950         rx_info->mbuf = m_getjcl(M_NOWAIT, MT_DATA, M_PKTHDR, MJUM16BYTES);
 951         ENA_RING_MTX_UNLOCK(rx_ring);
 952
 953         if (!rx_info->mbuf) {
 954                 counter_u64_add(rx_ring->rx_stats.mbuf_alloc_fail, 1);
 955                 return (ENOMEM);
 956         }
 957         /* Set mbuf length*/
 958         rx_info->mbuf->m_pkthdr.len = rx_info->mbuf->m_len = MJUM16BYTES;
 959
 960         /* Map packets for DMA */
 961         ena_trace(ENA_DBG | ENA_RSC | ENA_RXPTH,
 962             "Using tag %p for buffers' DMA mapping, mbuf %p len: %d",
 963             adapter->rx_buf_tag,rx_info->mbuf, rx_info->mbuf->m_len);
 964         error = bus_dmamap_load_mbuf_sg(adapter->rx_buf_tag, rx_info->map,
 965             rx_info->mbuf, segs, &nsegs, BUS_DMA_NOWAIT);
 966         if (error || (nsegs != 1)) {
 967                 device_printf(adapter->pdev, "failed to map mbuf, error: %d, "
 968                     "nsegs: %d\n", error, nsegs);
 969                 counter_u64_add(rx_ring->rx_stats.dma_mapping_err, 1);
 970                 goto exit;
 971
 972         }
 973
 974         bus_dmamap_sync(adapter->rx_buf_tag, rx_info->map, BUS_DMASYNC_PREREAD);
 975
 976         ena_buf = &rx_info->ena_buf;
 977         ena_buf->paddr = segs[0].ds_addr;
 978         ena_buf->len = MJUM16BYTES;
 979
 980         ena_trace(ENA_DBG | ENA_RSC | ENA_RXPTH,
 981             "ALLOC RX BUF: mbuf %p, rx_info %p, len %d, paddr %#jx\n",
 982             rx_info->mbuf, rx_info,ena_buf->len, (uintmax_t)ena_buf->paddr);
 983
 984         return (0);
 985
 986 exit:
 987         m_freem(rx_info->mbuf);
 988         rx_info->mbuf = NULL;
 989         return (EFAULT);
 990 }
 991
 992 static void
 993 ena_free_rx_mbuf(struct ena_adapter *adapter, struct ena_ring *rx_ring,
 994     struct ena_rx_buffer *rx_info)
 995 {
 996
 997         if (!rx_info->mbuf)
 998                 return;
 999
1000         bus_dmamap_unload(adapter->rx_buf_tag, rx_info->map);
1001         m_freem(rx_info->mbuf);
1002         rx_info->mbuf = NULL;
1003
1004         return;
1005 }
1006
1007
1008 /**
1009  * ena_refill_rx_bufs - Refills ring with descriptors
1010  * @rx_ring: the ring which we want to feed with free descriptors
1011  * @num: number of descriptors to refill
1012  * Refills the ring with newly allocated DMA-mapped mbufs for receiving
1013  **/
1014 static int
1015 ena_refill_rx_bufs(struct ena_ring *rx_ring, uint32_t num)
1016 {
1017         struct ena_adapter *adapter = rx_ring->adapter;
1018         uint16_t next_to_use;
1019         uint32_t i;
1020         int rc;
1021
1022         ena_trace(ENA_DBG | ENA_RXPTH | ENA_RSC, "refill qid: %d",
1023             rx_ring->qid);
1024
1025         next_to_use = rx_ring->next_to_use;
1026
1027         for (i = 0; i < num; i++) {
1028                 ena_trace(ENA_DBG | ENA_RXPTH | ENA_RSC,
1029                     "RX buffer - next to use: %d", next_to_use);
1030
1031                 struct ena_rx_buffer *rx_info =
1032                     &rx_ring->rx_buffer_info[next_to_use];
1033
1034                 rc = ena_alloc_rx_mbuf(adapter, rx_ring, rx_info);
1035                 if (rc < 0) {
1036                         device_printf(adapter->pdev,
1037                             "failed to alloc buffer for rx queue\n");
1038                         break;
1039                 }
1040                 rc = ena_com_add_single_rx_desc(rx_ring->ena_com_io_sq,
1041                     &rx_info->ena_buf, next_to_use);
1042                 if (unlikely(rc)) {
1043                         device_printf(adapter->pdev,
1044                             "failed to add buffer for rx queue %d\n",
1045                             rx_ring->qid);
1046                         break;
1047                 }
1048                 next_to_use = ENA_RX_RING_IDX_NEXT(next_to_use,
1049                     rx_ring->ring_size);
1050         }
1051
1052         if (i < num) {
1053                 counter_u64_add(rx_ring->rx_stats.refil_partial, 1);
1054                 device_printf(adapter->pdev,
1055                     "refilled rx queue %d with %d pages only\n",
1056                     rx_ring->qid, i);
1057         }
1058
1059         if (i != 0) {
1060                 wmb();
1061                 ena_com_write_sq_doorbell(rx_ring->ena_com_io_sq);
1062         }
1063         rx_ring->next_to_use = next_to_use;
1064         return (i);
1065 }
1066
1067 static void
1068 ena_free_rx_bufs(struct ena_adapter *adapter, unsigned int qid)
1069 {
1070         struct ena_ring *rx_ring = &adapter->rx_ring[qid];
1071         unsigned int i;
1072
1073         for (i = 0; i < rx_ring->ring_size; i++) {
1074                 struct ena_rx_buffer *rx_info = &rx_ring->rx_buffer_info[i];
1075
1076                 if (rx_info->mbuf)
1077                         ena_free_rx_mbuf(adapter, rx_ring, rx_info);
1078         }
1079
1080         return;
1081 }
1082
1083 /**
1084  * ena_refill_all_rx_bufs - allocate all queues Rx buffers
1085  * @adapter: network interface device structure
1086  *
1087  */
1088 static void
1089 ena_refill_all_rx_bufs(struct ena_adapter *adapter)
1090 {
1091         struct ena_ring *rx_ring;
1092         int i, rc, bufs_num;
1093
1094         for (i = 0; i < adapter->num_queues; i++) {
1095                 rx_ring = &adapter->rx_ring[i];
1096                 bufs_num = rx_ring->ring_size - 1;
1097                 rc = ena_refill_rx_bufs(rx_ring, bufs_num);
1098
1099                 if (unlikely(rc != bufs_num))
1100                         device_printf(adapter->pdev,
1101                             "refilling Queue %d failed. allocated %d buffers"
1102                             " from: %d\n", i, rc, bufs_num);
1103         }
1104 }
1105
1106 static void
1107 ena_free_all_rx_bufs(struct ena_adapter *adapter)
1108 {
1109         int i;
1110
1111         for (i = 0; i < adapter->num_queues; i++)
1112                 ena_free_rx_bufs(adapter, i);
1113         return;
1114 }
1115
1116 /**
1117  * ena_free_tx_bufs - Free Tx Buffers per Queue
1118  * @adapter: network interface device structure
1119  * @qid: queue index
1120  **/
1121 static void
1122 ena_free_tx_bufs(struct ena_adapter *adapter, unsigned int qid)
1123 {
1124         struct ena_ring *tx_ring = &adapter->tx_ring[qid];
1125
1126         ENA_RING_MTX_LOCK(tx_ring);
1127         for (int i = 0; i < tx_ring->ring_size; i++) {
1128                 struct ena_tx_buffer *tx_info = &tx_ring->tx_buffer_info[i];
1129
1130                 if (tx_info->mbuf == NULL)
1131                         continue;
1132
1133                 ena_trace(ENA_DBG | ENA_TXPTH | ENA_RSC,
1134                     "free uncompleted Tx mbufs qid[%d] idx: 0x%x", qid, i);
1135
1136                 bus_dmamap_unload(adapter->tx_buf_tag, tx_info->map);
1137                 m_free(tx_info->mbuf);
1138                 tx_info->mbuf = NULL;
1139         }
1140         ENA_RING_MTX_UNLOCK(tx_ring);
1141
1142         return;
1143 }
1144
1145 static void
1146 ena_free_all_tx_bufs(struct ena_adapter *adapter)
1147 {
1148
1149         for (int i = 0; i < adapter->num_queues; i++)
1150                 ena_free_tx_bufs(adapter, i);
1151
1152         return;
1153 }
1154
1155 static void
1156 ena_destroy_all_tx_queues(struct ena_adapter *adapter)
1157 {
1158         uint16_t ena_qid;
1159         int i;
1160
1161         for (i = 0; i < adapter->num_queues; i++) {
1162                 ena_qid = ENA_IO_TXQ_IDX(i);
1163                 ena_com_destroy_io_queue(adapter->ena_dev, ena_qid);
1164         }
1165 }
1166
1167 static void
1168 ena_destroy_all_rx_queues(struct ena_adapter *adapter)
1169 {
1170         uint16_t ena_qid;
1171         int i;
1172
1173         for (i = 0; i < adapter->num_queues; i++) {
1174                 ena_qid = ENA_IO_RXQ_IDX(i);
1175                 ena_com_destroy_io_queue(adapter->ena_dev, ena_qid);
1176         }
1177 }
1178
1179 static void
1180 ena_destroy_all_io_queues(struct ena_adapter *adapter)
1181 {
1182         ena_destroy_all_tx_queues(adapter);
1183         ena_destroy_all_rx_queues(adapter);
1184 }
1185
1186 static int
1187 validate_tx_req_id(struct ena_ring *tx_ring, uint16_t req_id)
1188 {
1189         struct ena_tx_buffer *tx_info = NULL;
1190
1191         if (likely(req_id < tx_ring->ring_size)) {
1192                 tx_info = &tx_ring->tx_buffer_info[req_id];
1193                 if (tx_info->mbuf)
1194                         return 0;
1195         }
1196
1197         counter_u64_add(tx_ring->tx_stats.bad_req_id, 1);
1198
1199         return (EFAULT);
1200 }
1201
1202 static int
1203 ena_create_io_queues(struct ena_adapter *adapter)
1204 {
1205         struct ena_com_dev *ena_dev = adapter->ena_dev;
1206         struct ena_com_create_io_ctx ctx;
1207         struct ena_ring *ring;
1208         uint16_t ena_qid;
1209         uint32_t msix_vector;
1210         int rc, i;
1211
1212         /* Create TX queues */
1213         for (i = 0; i < adapter->num_queues; i++) {
1214                 msix_vector = ENA_IO_IRQ_IDX(i);
1215                 ena_qid = ENA_IO_TXQ_IDX(i);
1216                 ctx.mem_queue_type = ena_dev->tx_mem_queue_type;
1217                 ctx.direction = ENA_COM_IO_QUEUE_DIRECTION_TX;
1218                 ctx.queue_size = adapter->tx_ring_size;
1219                 ctx.msix_vector = msix_vector;
1220                 ctx.qid = ena_qid;
1221                 rc = ena_com_create_io_queue(ena_dev, &ctx);
1222                 if (rc) {
1223                         device_printf(adapter->pdev,
1224                             "Failed to create io TX queue #%d rc: %d\n", i, rc);
1225                         goto err_tx;
1226                 }
1227                 ring = &adapter->tx_ring[i];
1228                 rc = ena_com_get_io_handlers(ena_dev, ena_qid,
1229                     &ring->ena_com_io_sq,
1230                     &ring->ena_com_io_cq);
1231                 if (rc) {
1232                         device_printf(adapter->pdev,
1233                             "Failed to get TX queue handlers. TX queue num"
1234                             " %d rc: %d\n", i, rc);
1235                         ena_com_destroy_io_queue(ena_dev, ena_qid);
1236                         goto err_tx;
1237                 }
1238         }
1239
1240         /* Create RX queues */
1241         for (i = 0; i < adapter->num_queues; i++) {
1242                 msix_vector = ENA_IO_IRQ_IDX(i);
1243                 ena_qid = ENA_IO_RXQ_IDX(i);
1244                 ctx.mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST;
1245                 ctx.direction = ENA_COM_IO_QUEUE_DIRECTION_RX;
1246                 ctx.queue_size = adapter->rx_ring_size;
1247                 ctx.msix_vector = msix_vector;
1248                 ctx.qid = ena_qid;
1249                 rc = ena_com_create_io_queue(ena_dev, &ctx);
1250                 if (rc) {
1251                         device_printf(adapter->pdev,
1252                             "Failed to create io RX queue[%d] rc: %d\n", i, rc);
1253                         goto err_rx;
1254                 }
1255
1256                 ring = &adapter->rx_ring[i];
1257                 rc = ena_com_get_io_handlers(ena_dev, ena_qid,
1258                     &ring->ena_com_io_sq,
1259                     &ring->ena_com_io_cq);
1260                 if (rc) {
1261                         device_printf(adapter->pdev,
1262                             "Failed to get RX queue handlers. RX queue num"
1263                             " %d rc: %d\n", i, rc);
1264                         ena_com_destroy_io_queue(ena_dev, ena_qid);
1265                         goto err_rx;
1266                 }
1267         }
1268
1269         return (0);
1270
1271 err_rx:
1272         while (i--)
1273                 ena_com_destroy_io_queue(ena_dev, ENA_IO_RXQ_IDX(i));
1274         i = adapter->num_queues;
1275 err_tx:
1276         while (i--)
1277                 ena_com_destroy_io_queue(ena_dev, ENA_IO_TXQ_IDX(i));
1278
1279         return (ENXIO);
1280 }
1281
1282 /**
1283  * ena_tx_cleanup - clear sent packets and corresponding descriptors
1284  * @tx_ring: ring for which we want to clean packets
1285  *
1286  * Once packets are sent, we ask the device in a loop for no longer used
1287  * descriptors. We find the related mbuf chain in a map (index in an array)
1288  * and free it, then update ring state.
1289  * This is performed in "endless" loop, updating ring pointers every
1290  * TX_COMMIT. The first check of free descriptor is performed before the actual
1291  * loop, then repeated at the loop end.
1292  **/
1293 static int
1294 ena_tx_cleanup(struct ena_ring *tx_ring)
1295 {
1296         struct ena_adapter *adapter;
1297         struct ena_com_io_cq* io_cq;
1298         uint16_t next_to_clean;
1299         uint16_t req_id;
1300         uint16_t ena_qid;
1301         unsigned int total_done = 0;
1302         int rc;
1303         int commit = TX_COMMIT;
1304         int budget = TX_BUDGET;
1305         int work_done;
1306
1307         adapter = tx_ring->que->adapter;
1308         ena_qid = ENA_IO_TXQ_IDX(tx_ring->que->id);
1309         io_cq = &adapter->ena_dev->io_cq_queues[ena_qid];
1310         next_to_clean = tx_ring->next_to_clean;
1311
1312         do {
1313                 struct ena_tx_buffer *tx_info;
1314                 struct mbuf *mbuf;
1315
1316                 rc = ena_com_tx_comp_req_id_get(io_cq, &req_id);
1317                 if (rc != 0)
1318                         break;
1319
1320                 rc = validate_tx_req_id(tx_ring, req_id);
1321                 if (rc)
1322                         break;
1323
1324                 tx_info = &tx_ring->tx_buffer_info[req_id];
1325
1326                 mbuf = tx_info->mbuf;
1327
1328                 tx_info->mbuf = NULL;
1329                 bintime_clear(&tx_info->timestamp);
1330
1331                 if (tx_info->num_of_bufs != 0) {
1332                         /* Map is no longer required */
1333                         bus_dmamap_unload(adapter->tx_buf_tag, tx_info->map);
1334                 }
1335
1336                 m_freem(mbuf);
1337
1338                 total_done += tx_info->tx_descs;
1339
1340                 tx_ring->free_tx_ids[next_to_clean] = req_id;
1341                 next_to_clean = ENA_TX_RING_IDX_NEXT(next_to_clean,
1342                     tx_ring->ring_size);
1343
1344                 if (--commit == 0) {
1345                         commit = TX_COMMIT;
1346                         /* update ring state every TX_COMMIT descriptor */
1347                         tx_ring->next_to_clean = next_to_clean;
1348                         ena_com_comp_ack(&adapter->ena_dev->io_sq_queues[ena_qid], total_done);
1349                         ena_com_update_dev_comp_head(io_cq);
1350                         total_done = 0;
1351                 }
1352         } while (--budget);
1353
1354         work_done = TX_BUDGET - budget;
1355
1356         /* If there is still something to commit update ring state */
1357         if (commit != TX_COMMIT) {
1358                 tx_ring->next_to_clean = next_to_clean;
1359                 ena_com_comp_ack(&adapter->ena_dev->io_sq_queues[ena_qid], total_done);
1360                 ena_com_update_dev_comp_head(io_cq);
1361         }
1362
1363         taskqueue_enqueue(tx_ring->enqueue_tq, &tx_ring->enqueue_task);
1364
1365         return (work_done);
1366 }
1367
1368 static void
1369 ena_rx_hash_mbuf(struct ena_ring *rx_ring, struct ena_com_rx_ctx *ena_rx_ctx,
1370     struct mbuf *mbuf)
1371 {
1372         struct ena_adapter *adapter = rx_ring->adapter;
1373
1374         if (adapter->rss_support) {
1375                 mbuf->m_pkthdr.flowid = ena_rx_ctx->hash;
1376
1377                 if (ena_rx_ctx->frag &&
1378                     ena_rx_ctx->l3_proto != ENA_ETH_IO_L4_PROTO_UNKNOWN) {
1379                         M_HASHTYPE_SET(mbuf, M_HASHTYPE_OPAQUE_HASH);
1380                         return;
1381                 }
1382
1383                 switch (ena_rx_ctx->l3_proto) {
1384                 case ENA_ETH_IO_L3_PROTO_IPV4:
1385                         switch (ena_rx_ctx->l4_proto) {
1386                         case ENA_ETH_IO_L4_PROTO_TCP:
1387                                 M_HASHTYPE_SET(mbuf, M_HASHTYPE_RSS_TCP_IPV4);
1388                                 break;
1389                         case ENA_ETH_IO_L4_PROTO_UDP:
1390                                 M_HASHTYPE_SET(mbuf, M_HASHTYPE_RSS_UDP_IPV4);
1391                                 break;
1392                         default:
1393                                 M_HASHTYPE_SET(mbuf, M_HASHTYPE_RSS_IPV4);
1394                         }
1395                         break;
1396                 case ENA_ETH_IO_L3_PROTO_IPV6:
1397                         switch (ena_rx_ctx->l4_proto) {
1398                         case ENA_ETH_IO_L4_PROTO_TCP:
1399                                 M_HASHTYPE_SET(mbuf, M_HASHTYPE_RSS_TCP_IPV6);
1400                                 break;
1401                         case ENA_ETH_IO_L4_PROTO_UDP:
1402                                 M_HASHTYPE_SET(mbuf, M_HASHTYPE_RSS_UDP_IPV6);
1403                                 break;
1404                         default:
1405                                 M_HASHTYPE_SET(mbuf, M_HASHTYPE_RSS_IPV6);
1406                         }
1407                         break;
1408                 case ENA_ETH_IO_L3_PROTO_UNKNOWN:
1409                         M_HASHTYPE_SET(mbuf, M_HASHTYPE_NONE);
1410                         break;
1411                 default:
1412                         M_HASHTYPE_SET(mbuf, M_HASHTYPE_OPAQUE_HASH);
1413                 }
1414         } else {
1415                 mbuf->m_pkthdr.flowid = rx_ring->qid;
1416                 M_HASHTYPE_SET(mbuf, M_HASHTYPE_NONE);
1417         }
1418 }
1419
1420 /**
1421  * ena_rx_mbuf - assemble mbuf from descriptors
1422  * @rx_ring: ring for which we want to clean packets
1423  * @ena_bufs: buffer info
1424  * @ena_rx_ctx: metadata for this packet(s)
1425  * @next_to_clean: ring pointer
1426  *
1427  **/
1428 static struct mbuf*
1429 ena_rx_mbuf(struct ena_ring *rx_ring, struct ena_com_rx_buf_info *ena_bufs,
1430     struct ena_com_rx_ctx *ena_rx_ctx, uint16_t *next_to_clean)
1431 {
1432         struct mbuf *mbuf;
1433         struct ena_rx_buffer *rx_info;
1434         struct ena_adapter *adapter;
1435         unsigned int len, buf = 0;
1436         unsigned int descs = ena_rx_ctx->descs;
1437
1438         adapter = rx_ring->adapter;
1439         rx_info = &rx_ring->rx_buffer_info[*next_to_clean];
1440
1441         ENA_ASSERT(rx_info->mbuf, "Invalid alloc frag buffer\n");
1442
1443         len = ena_bufs[0].len;
1444         ena_trace(ENA_DBG | ENA_RXPTH, "rx_info %p, mbuf %p, paddr %jx",
1445             rx_info, rx_info->mbuf, (uintmax_t)rx_info->ena_buf.paddr);
1446
1447         mbuf = rx_info->mbuf;
1448         mbuf->m_flags |= M_PKTHDR;
1449         mbuf->m_pkthdr.len = len;
1450         mbuf->m_len = len;
1451         mbuf->m_pkthdr.rcvif = rx_ring->que->adapter->ifp;
1452
1453         /* Fill mbuf with hash key and it's interpretation for optimization */
1454         ena_rx_hash_mbuf(rx_ring, ena_rx_ctx, mbuf);
1455
1456         ena_trace(ENA_DBG | ENA_RXPTH, "rx mbuf 0x%p, flags=0x%x, len: %d",
1457             mbuf, mbuf->m_flags, mbuf->m_pkthdr.len);
1458
1459         /* DMA address is not needed anymore, unmap it */
1460         bus_dmamap_unload(rx_ring->adapter->rx_buf_tag, rx_info->map);
1461
1462         rx_info->mbuf = NULL;
1463         *next_to_clean = ENA_RX_RING_IDX_NEXT(*next_to_clean,
1464             rx_ring->ring_size);
1465
1466         /*
1467          * While we have more than 1 descriptors for one rcvd packet, append
1468          * other mbufs to the main one
1469          */
1470         while (--descs) {
1471                 rx_info = &rx_ring->rx_buffer_info[*next_to_clean];
1472                 len = ena_bufs[++buf].len;
1473
1474                 if (!m_append(mbuf, len, rx_info->mbuf->m_data)) {
1475                         counter_u64_add(rx_ring->rx_stats.mbuf_alloc_fail, 1);
1476                         ena_trace(ENA_WARNING, "Failed to append Rx mbuf %p",
1477                             mbuf);
1478                 }
1479                 /* Free already appended mbuf, it won't be useful anymore */
1480                 bus_dmamap_unload(rx_ring->adapter->rx_buf_tag, rx_info->map);
1481                 m_freem(rx_info->mbuf);
1482                 rx_info->mbuf = NULL;
1483
1484                 *next_to_clean = ENA_RX_RING_IDX_NEXT(*next_to_clean,
1485                     rx_ring->ring_size);
1486         }
1487
1488         return (mbuf);
1489 }
1490
1491 /**
1492  * ena_rx_checksum - indicate in mbuf if hw indicated a good cksum
1493  **/
1494 static inline void
1495 ena_rx_checksum(struct ena_ring *rx_ring, struct ena_com_rx_ctx *ena_rx_ctx,
1496     struct mbuf *mbuf)
1497 {
1498
1499         /* if IP and error */
1500         if ((ena_rx_ctx->l3_proto == ENA_ETH_IO_L3_PROTO_IPV4) &&
1501             (ena_rx_ctx->l3_csum_err)) {
1502                 /* ipv4 checksum error */
1503                 mbuf->m_pkthdr.csum_flags = 0;
1504                 counter_u64_add(rx_ring->rx_stats.bad_csum, 1);
1505                 return;
1506         }
1507
1508         /* if TCP/UDP */
1509         if ((ena_rx_ctx->l4_proto == ENA_ETH_IO_L4_PROTO_TCP) ||
1510             (ena_rx_ctx->l4_proto == ENA_ETH_IO_L4_PROTO_UDP)) {
1511                 if (ena_rx_ctx->l4_csum_err) {
1512                         /* TCP/UDP checksum error */
1513                         mbuf->m_pkthdr.csum_flags = 0;
1514                         counter_u64_add(rx_ring->rx_stats.bad_csum, 1);
1515                 } else {
1516                         mbuf->m_pkthdr.csum_flags = CSUM_IP_CHECKED;
1517                         mbuf->m_pkthdr.csum_flags |= CSUM_IP_VALID;
1518                 }
1519         }
1520
1521         return;
1522 }
1523
1524 /**
1525  * ena_rx_cleanup - handle rx irq
1526  * @arg: ring for which irq is being handled
1527  **/
1528 static int
1529 ena_rx_cleanup(struct ena_ring *rx_ring)
1530 {
1531         struct ena_adapter *adapter;
1532         struct mbuf *mbuf;
1533         struct ena_com_rx_ctx ena_rx_ctx;
1534         struct ena_com_io_cq* io_cq;
1535         struct ena_com_io_sq* io_sq;
1536         /* struct ena_eth_io_intr_reg intr_reg; */
1537         if_t ifp;
1538         uint16_t ena_qid;
1539         uint16_t next_to_clean;
1540         uint32_t refill_required;
1541         uint32_t refill_threshold;
1542         uint32_t do_if_input = 0;
1543         unsigned int qid;
1544         int rc;
1545         int budget = RX_BUDGET;
1546
1547         adapter = rx_ring->que->adapter;
1548         ifp = adapter->ifp;
1549         qid = rx_ring->que->id;
1550         ena_qid = ENA_IO_RXQ_IDX(qid);
1551         io_cq = &adapter->ena_dev->io_cq_queues[ena_qid];
1552         io_sq = &adapter->ena_dev->io_sq_queues[ena_qid];
1553         next_to_clean = rx_ring->next_to_clean;
1554
1555         do {
1556                 ena_rx_ctx.ena_bufs = rx_ring->ena_bufs;
1557                 ena_rx_ctx.max_bufs = adapter->max_rx_sgl_size;
1558                 ena_rx_ctx.descs = 0;
1559                 rc = ena_com_rx_pkt(io_cq, io_sq, &ena_rx_ctx);
1560
1561                 if (unlikely(rc))
1562                         goto error;
1563
1564                 if (unlikely(ena_rx_ctx.descs == 0))
1565                         break;
1566
1567                 /* Receive mbuf from the ring */
1568                 mbuf = ena_rx_mbuf(rx_ring, rx_ring->ena_bufs,
1569                     &ena_rx_ctx, &next_to_clean);
1570
1571                 /* Exit if we failed to retrieve a buffer */
1572                 if (unlikely(!mbuf)) {
1573                         next_to_clean = ENA_RX_RING_IDX_ADD(next_to_clean,
1574                             ena_rx_ctx.descs, rx_ring->ring_size);
1575                         break;
1576                 }
1577                 ena_trace(ENA_DBG | ENA_RXPTH, "Rx: %d bytes",
1578                     mbuf->m_pkthdr.len);
1579
1580                 if ((ifp->if_capenable & IFCAP_RXCSUM) ||
1581                     (ifp->if_capenable & IFCAP_RXCSUM_IPV6)) {
1582                         ena_rx_checksum(rx_ring, &ena_rx_ctx, mbuf);
1583                 }
1584
1585                 counter_u64_add(rx_ring->rx_stats.bytes, mbuf->m_pkthdr.len);
1586                 /*
1587                  * LRO is only for IP/TCP packets and TCP checksum of the packet
1588                  * should be computed by hardware.
1589                  */
1590                 do_if_input = 1;
1591                 if ((ifp->if_capenable & IFCAP_LRO) &&
1592                     (mbuf->m_pkthdr.csum_flags & CSUM_IP_VALID) &&
1593                     ena_rx_ctx.l4_proto == ENA_ETH_IO_L4_PROTO_TCP) {
1594                         /*
1595                          * Send to the stack if:
1596                          *  - LRO not enabled, or
1597                          *  - no LRO resources, or
1598                          *  - lro enqueue fails
1599                          */
1600                         if (rx_ring->lro.lro_cnt != 0 &&
1601                             tcp_lro_rx(&rx_ring->lro, mbuf, 0) == 0)
1602                                         do_if_input = 0;
1603                 }
1604                 if (do_if_input) {
1605                         ena_trace(ENA_DBG | ENA_RXPTH, "calling if_input() with mbuf %p",
1606                             mbuf);
1607                         (*ifp->if_input)(ifp, mbuf);
1608                 }
1609
1610                 counter_u64_add(rx_ring->rx_stats.cnt, 1);
1611         } while (--budget);
1612
1613         rx_ring->next_to_clean = next_to_clean;
1614
1615         refill_required = ena_com_sq_empty_space(io_sq);
1616         refill_threshold = rx_ring->ring_size / ENA_RX_REFILL_THRESH_DEVIDER;
1617
1618         if (refill_required > refill_threshold) {
1619                 ena_com_update_dev_comp_head(rx_ring->ena_com_io_cq);
1620                 ena_refill_rx_bufs(rx_ring, refill_required);
1621         }
1622
1623         tcp_lro_flush_all(&rx_ring->lro);
1624
1625         return (RX_BUDGET - budget);
1626
1627 error:
1628         counter_u64_add(rx_ring->rx_stats.bad_desc_num, 1);
1629         return (RX_BUDGET - budget);
1630 }
1631
1632 /*********************************************************************
1633  *
1634  *  MSIX & Interrupt Service routine
1635  *
1636  **********************************************************************/
1637
1638 /**
1639  * ena_handle_msix - MSIX Interrupt Handler for admin/async queue
1640  * @arg: interrupt number
1641  **/
1642 static void
1643 ena_intr_msix_mgmnt(void *arg)
1644 {
1645         struct ena_adapter *adapter = (struct ena_adapter *)arg;
1646
1647         ena_com_admin_q_comp_intr_handler(adapter->ena_dev);
1648         if (likely(adapter->running))
1649                 ena_com_aenq_intr_handler(adapter->ena_dev, arg);
1650 }
1651
1652 /**
1653  * ena_handle_msix - MSIX Interrupt Handler for Tx/Rx
1654  * @arg: interrupt number
1655  **/
1656 static void
1657 ena_handle_msix(void *arg)
1658 {
1659         struct ena_que  *que = arg;
1660         struct ena_adapter *adapter = que->adapter;
1661         if_t ifp = adapter->ifp;
1662         struct ena_ring *tx_ring;
1663         struct ena_ring *rx_ring;
1664         struct ena_com_io_cq* io_cq;
1665         struct ena_eth_io_intr_reg intr_reg;
1666         int qid, ena_qid;
1667         int txc, rxc, i;
1668
1669         if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
1670                 return;
1671
1672         ena_trace(ENA_DBG, "MSI-X TX/RX routine");
1673
1674         tx_ring = que->tx_ring;
1675         rx_ring = que->rx_ring;
1676         qid = que->id;
1677         ena_qid = ENA_IO_TXQ_IDX(qid);
1678         io_cq = &adapter->ena_dev->io_cq_queues[ena_qid];
1679
1680         for (i = 0; i < CLEAN_BUDGET; ++i) {
1681                 rxc = ena_rx_cleanup(rx_ring);
1682
1683                 /* Protection from calling ena_tx_cleanup from ena_start_xmit */
1684                 ENA_RING_MTX_LOCK(tx_ring);
1685                 txc = ena_tx_cleanup(tx_ring);
1686                 ENA_RING_MTX_UNLOCK(tx_ring);
1687
1688                 if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
1689                         return;
1690
1691                 if (txc != TX_BUDGET && rxc != RX_BUDGET)
1692                        break;
1693         }
1694
1695         /* Signal that work is done and unmask interrupt */
1696         ena_com_update_intr_reg(&intr_reg,
1697             RX_IRQ_INTERVAL,
1698             TX_IRQ_INTERVAL,
1699             true);
1700         ena_com_unmask_intr(io_cq, &intr_reg);
1701 }
1702
1703 static int
1704 ena_enable_msix(struct ena_adapter *adapter)
1705 {
1706         device_t dev = adapter->pdev;
1707         int i, msix_vecs, rc = 0;
1708
1709         /* Reserved the max msix vectors we might need */
1710         msix_vecs = ENA_MAX_MSIX_VEC(adapter->num_queues);
1711
1712         adapter->msix_entries = ENA_MEM_ALLOC(adapter->ena_dev->dmadev,
1713             msix_vecs * sizeof(struct msix_entry));
1714         if (!adapter->msix_entries) {
1715                 device_printf(dev,
1716                     "Failed to allocate msix_entries, vectors %d\n", msix_vecs);
1717                 rc = ENOMEM;
1718                 goto error;
1719         }
1720         device_printf(dev, "Allocated msix_entries, vectors (cnt: %d)\n",
1721             msix_vecs);
1722
1723         for (i = 0; i < msix_vecs; i++) {
1724                 adapter->msix_entries[i].entry = i;
1725                 /* Vectors must start from 1 */
1726                 adapter->msix_entries[i].vector = i + 1;
1727         }
1728
1729         rc = pci_alloc_msix(dev, &msix_vecs);
1730         if (rc != 0) {
1731                 device_printf(dev,
1732                     "Failed to enable MSIX, vectors %d rc %d\n", msix_vecs, rc);
1733                 ENA_MEM_FREE(adapter->ena_dev->dmadev, adapter->msix_entries);
1734                 adapter->msix_entries = NULL;
1735                 rc = ENOSPC;
1736                 goto error;
1737         }
1738
1739         adapter->msix_vecs = msix_vecs;
1740         adapter->msix_enabled = true;
1741
1742 error:
1743         return (rc);
1744 }
1745
1746 static void
1747 ena_setup_mgmnt_intr(struct ena_adapter *adapter)
1748 {
1749
1750         snprintf(adapter->irq_tbl[ENA_MGMNT_IRQ_IDX].name,
1751             ENA_IRQNAME_SIZE, "ena-mgmnt@pci:%s",
1752             device_get_nameunit(adapter->pdev));
1753         /*
1754          * Handler is NULL on purpose, it will be set
1755          * when mgmnt interrupt is acquired
1756          */
1757         adapter->irq_tbl[ENA_MGMNT_IRQ_IDX].handler = NULL;
1758         adapter->irq_tbl[ENA_MGMNT_IRQ_IDX].data = adapter;
1759         adapter->irq_tbl[ENA_MGMNT_IRQ_IDX].vector =
1760             adapter->msix_entries[ENA_MGMNT_IRQ_IDX].vector;
1761
1762         return;
1763 }
1764
1765 static void
1766 ena_setup_io_intr(struct ena_adapter *adapter)
1767 {
1768         static int last_bind_cpu = -1;
1769         int irq_idx;
1770         ena_trace(ENA_DBG, "enter");
1771
1772         for (int i = 0; i < adapter->num_queues; i++) {
1773                 irq_idx = ENA_IO_IRQ_IDX(i);
1774
1775                 snprintf(adapter->irq_tbl[irq_idx].name, ENA_IRQNAME_SIZE,
1776                     "%s-TxRx-%d", device_get_nameunit(adapter->pdev), i);
1777                 adapter->irq_tbl[irq_idx].handler = ena_handle_msix;
1778                 adapter->irq_tbl[irq_idx].data = &adapter->que[i];
1779                 adapter->irq_tbl[irq_idx].vector =
1780                     adapter->msix_entries[irq_idx].vector;
1781                 ena_trace(ENA_INFO | ENA_IOQ, "ena_setup_io_intr vector: %d\n",
1782                     adapter->msix_entries[irq_idx].vector);
1783 #ifdef  RSS
1784                 adapter->que[i].cpu = adapter->irq_tbl[irq_idx].cpu =
1785                     rss_getcpu(i % rss_getnumbuckets());
1786 #else
1787                 /*
1788                  * We still want to bind rings to the corresponding cpu
1789                  * using something similar to the RSS round-robin technique.
1790                  */
1791                 if (last_bind_cpu < 0)
1792                         last_bind_cpu = CPU_FIRST();
1793                 adapter->que[i].cpu = adapter->irq_tbl[irq_idx].cpu =
1794                     last_bind_cpu;
1795                 last_bind_cpu = CPU_NEXT(last_bind_cpu);
1796 #endif
1797         }
1798
1799         return;
1800 }
1801
1802 static int
1803 ena_request_mgmnt_irq(struct ena_adapter *adapter)
1804 {
1805         struct ena_irq *irq;
1806         unsigned long flags;
1807         int rc, rcc;
1808
1809         flags = RF_ACTIVE | RF_SHAREABLE;
1810
1811         irq = &adapter->irq_tbl[ENA_MGMNT_IRQ_IDX];
1812         irq->res = bus_alloc_resource_any(adapter->pdev, SYS_RES_IRQ,
1813             &irq->vector, flags);
1814
1815         if (irq->res == NULL) {
1816                 device_printf(adapter->pdev, "could not allocate "
1817                     "irq vector: %d\n", irq->vector);
1818                 rc = ENXIO;
1819                 goto exit_res;
1820         }
1821
1822         if ((rc = bus_activate_resource(adapter->pdev, SYS_RES_IRQ, irq->vector,
1823             irq->res)) != 0) {
1824                 device_printf(adapter->pdev, "could not activate "
1825                     "irq vector: %d\n", irq->vector);
1826                 goto exit_intr;
1827         }
1828
1829         if ((rc = bus_setup_intr(adapter->pdev, irq->res,
1830             INTR_TYPE_NET | INTR_MPSAFE, NULL,
1831             ena_intr_msix_mgmnt, irq->data, &irq->cookie)) != 0) {
1832                 device_printf(adapter->pdev, "failed to register "
1833                     "interrupt handler for irq %ju: %d\n",
1834                     rman_get_start(irq->res), rc);
1835                 goto exit_intr;
1836         }
1837         irq->requested = true;
1838
1839         return (rc);
1840
1841 exit_intr:
1842         device_printf(adapter->pdev, "exit_intr: releasing resource"
1843             " for irq %d\n", irq->vector);
1844         rcc = bus_release_resource(adapter->pdev, SYS_RES_IRQ,
1845             irq->vector, irq->res);
1846         if (rcc)
1847                 device_printf(adapter->pdev, "dev has no parent while "
1848                     "releasing res for irq: %d\n", irq->vector);
1849         irq->res = NULL;
1850
1851 exit_res:
1852         return (rc);
1853 }
1854
1855 static int
1856 ena_request_io_irq(struct ena_adapter *adapter)
1857 {
1858         struct ena_irq *irq;
1859         unsigned long flags = 0;
1860         int rc = 0, i, rcc;
1861
1862         if (!adapter->msix_enabled) {
1863                 device_printf(adapter->pdev, "failed to request irq\n");
1864                 return (EINVAL);
1865         } else {
1866                 flags = RF_ACTIVE | RF_SHAREABLE;
1867         }
1868
1869         for (i = ENA_IO_IRQ_FIRST_IDX; i < adapter->msix_vecs; i++) {
1870                 irq = &adapter->irq_tbl[i];
1871
1872                 if (irq->requested)
1873                         continue;
1874
1875                 irq->res = bus_alloc_resource_any(adapter->pdev, SYS_RES_IRQ,
1876                     &irq->vector, flags);
1877                 if (irq->res == NULL) {
1878                         device_printf(adapter->pdev, "could not allocate "
1879                             "irq vector: %d\n", irq->vector);
1880                         goto err;
1881                 }
1882
1883                 if ((rc = bus_setup_intr(adapter->pdev, irq->res,
1884                             INTR_TYPE_NET | INTR_MPSAFE, NULL, irq->handler,
1885                             irq->data, &irq->cookie)) != 0) {
1886                         device_printf(adapter->pdev, "failed to register "
1887                             "interrupt handler for irq %ju: %d\n",
1888                             rman_get_start(irq->res), rc);
1889                         goto err;
1890                 }
1891                 irq->requested = true;
1892
1893 #ifdef  RSS
1894                 device_printf(adapter->pdev, "queue %d - RSS bucket %d\n",
1895                     i - ENA_IO_IRQ_FIRST_IDX, irq->cpu);
1896 #else
1897                 device_printf(adapter->pdev, "queue %d - cpu %d\n",
1898                     i - ENA_IO_IRQ_FIRST_IDX, irq->cpu);
1899 #endif
1900         }
1901
1902         return (rc);
1903
1904 err:
1905
1906         for (; i >= ENA_IO_IRQ_FIRST_IDX; i--) {
1907                 irq = &adapter->irq_tbl[i];
1908                 rcc = 0;
1909
1910                 /* Once we entered err: section and irq->requested is true we
1911                    free both intr and resources */
1912                 if (irq->requested == true)
1913                         rcc = bus_teardown_intr(adapter->pdev, irq->res, irq->cookie);
1914                 if (rcc)
1915                         device_printf(adapter->pdev, "could not release"
1916                             " irq: %d, error: %d\n", irq->vector, rcc);
1917
1918                 /* If we entred err: section without irq->requested set we know
1919                    it was bus_alloc_resource_any() that needs cleanup, provided
1920                    res is not NULL. In case res is NULL no work in needed in
1921                    this iteration */
1922                 rcc = 0;
1923                 if (irq->res != NULL) {
1924                         rcc = bus_release_resource(adapter->pdev, SYS_RES_IRQ,
1925                             irq->vector, irq->res);
1926                 }
1927                 if (rcc)
1928                         device_printf(adapter->pdev, "dev has no parent while "
1929                             "releasing res for irq: %d\n", irq->vector);
1930                 irq->requested = false;
1931                 irq->res = NULL;
1932         }
1933
1934         return (rc);
1935 }
1936
1937 static void
1938 ena_free_mgmnt_irq(struct ena_adapter *adapter)
1939 {
1940         struct ena_irq *irq;
1941         int rc;
1942
1943         irq = &adapter->irq_tbl[ENA_MGMNT_IRQ_IDX];
1944         if (irq->requested) {
1945                 ena_trace(ENA_INFO | ENA_ADMQ, "tear down irq: %d\n",
1946                     irq->vector);
1947                 rc = bus_teardown_intr(adapter->pdev, irq->res, irq->cookie);
1948                 if (rc)
1949                         device_printf(adapter->pdev, "failed to tear "
1950                             "down irq: %d\n", irq->vector);
1951                 irq->requested = 0;
1952         }
1953
1954         if (irq->res != NULL) {
1955                 ena_trace(ENA_INFO | ENA_ADMQ, "release resource irq: %d\n",
1956                     irq->vector);
1957                 rc = bus_release_resource(adapter->pdev, SYS_RES_IRQ,
1958                     irq->vector, irq->res);
1959                 irq->res = NULL;
1960                 if (rc)
1961                         device_printf(adapter->pdev, "dev has no parent while "
1962                             "releasing res for irq: %d\n", irq->vector);
1963         }
1964
1965         return;
1966 }
1967
1968 static void
1969 ena_free_io_irq(struct ena_adapter *adapter)
1970 {
1971         struct ena_irq *irq;
1972         int rc;
1973
1974         for (int i = ENA_IO_IRQ_FIRST_IDX; i < adapter->msix_vecs; i++) {
1975                 irq = &adapter->irq_tbl[i];
1976                 if (irq->requested) {
1977                         ena_trace(ENA_INFO | ENA_IOQ, "tear down irq: %d\n",
1978                             irq->vector);
1979                         rc = bus_teardown_intr(adapter->pdev, irq->res,
1980                             irq->cookie);
1981                         if (rc) {
1982                                 device_printf(adapter->pdev, "failed to tear "
1983                                     "down irq: %d\n", irq->vector);
1984                         }
1985                         irq->requested = 0;
1986                 }
1987
1988                 if (irq->res != NULL) {
1989                         ena_trace(ENA_INFO | ENA_IOQ, "release resource irq: %d\n",
1990                             irq->vector);
1991                         rc = bus_release_resource(adapter->pdev, SYS_RES_IRQ,
1992                             irq->vector, irq->res);
1993                         irq->res = NULL;
1994                         if (rc) {
1995                                 device_printf(adapter->pdev, "dev has no parent"
1996                                     " while releasing res for irq: %d\n",
1997                                     irq->vector);
1998                         }
1999                 }
2000         }
2001
2002         return;
2003 }
2004
2005 static void
2006 ena_free_irqs(struct ena_adapter* adapter)
2007 {
2008
2009         ena_free_io_irq(adapter);
2010         ena_free_mgmnt_irq(adapter);
2011         ena_disable_msix(adapter);
2012 }
2013
2014 static void
2015 ena_disable_msix(struct ena_adapter *adapter)
2016 {
2017
2018         pci_release_msi(adapter->pdev);
2019
2020         adapter->msix_vecs = 0;
2021         ENA_MEM_FREE(adapter->ena_dev->dmadev, adapter->msix_entries);
2022         adapter->msix_entries = NULL;
2023 }
2024
2025 static void
2026 ena_unmask_all_io_irqs(struct ena_adapter *adapter)
2027 {
2028         struct ena_com_io_cq* io_cq;
2029         struct ena_eth_io_intr_reg intr_reg;
2030         uint16_t ena_qid;
2031         int i;
2032
2033         /* Unmask interrupts for all queues */
2034         for (i = 0; i < adapter->num_queues; i++) {
2035                 ena_qid = ENA_IO_TXQ_IDX(i);
2036                 io_cq = &adapter->ena_dev->io_cq_queues[ena_qid];
2037                 ena_com_update_intr_reg(&intr_reg, 0, 0, true);
2038                 ena_com_unmask_intr(io_cq, &intr_reg);
2039         }
2040 }
2041
2042 /* Configure the Rx forwarding */
2043 static int ena_rss_configure(struct ena_adapter *adapter)
2044 {
2045         struct ena_com_dev *ena_dev = adapter->ena_dev;
2046         int rc;
2047
2048         /* Set indirect table */
2049         rc = ena_com_indirect_table_set(ena_dev);
2050         if (unlikely(rc && rc != EPERM))
2051                 return rc;
2052
2053         /* Configure hash function (if supported) */
2054         rc = ena_com_set_hash_function(ena_dev);
2055         if (unlikely(rc && (rc != EPERM)))
2056                 return rc;
2057
2058         /* Configure hash inputs (if supported) */
2059         rc = ena_com_set_hash_ctrl(ena_dev);
2060         if (unlikely(rc && (rc != EPERM)))
2061                 return rc;
2062
2063         return 0;
2064 }
2065
2066 static void
2067 ena_update_hw_stats(void *arg, int pending)
2068 {
2069         struct ena_adapter *adapter = arg;
2070         int rc;
2071
2072         for (;;) {
2073                 if (!adapter->up)
2074                         return;
2075
2076                 rc = ena_update_stats_counters(adapter);
2077                 if (rc)
2078                         ena_trace(ENA_WARNING,
2079                             "Error updating stats counters, rc = %d", rc);
2080
2081                 pause("ena update hw stats", hz);
2082         }
2083 }
2084
2085 static int
2086 ena_up_complete(struct ena_adapter *adapter)
2087 {
2088         int rc;
2089
2090         if (adapter->rss_support) {
2091                 rc = ena_rss_configure(adapter);
2092                 if (rc)
2093                         return (rc);
2094         }
2095
2096         ena_change_mtu(adapter->ifp, adapter->ifp->if_mtu);
2097         ena_refill_all_rx_bufs(adapter);
2098         ena_unmask_all_io_irqs(adapter);
2099
2100         return (0);
2101 }
2102
2103 static int
2104 ena_up(struct ena_adapter *adapter)
2105 {
2106         int rc = 0;
2107
2108         if (!device_is_attached(adapter->pdev)) {
2109                 device_printf(adapter->pdev, "device is not attached!\n");
2110                 return (ENXIO);
2111         }
2112
2113         if (!adapter->running) {
2114                 device_printf(adapter->pdev, "device is not running!\n");
2115                 return (ENXIO);
2116         }
2117
2118         if (!adapter->up) {
2119                 device_printf(adapter->pdev, "device is going UP\n");
2120
2121                 /* setup interrupts for IO queues */
2122                 ena_setup_io_intr(adapter);
2123                 rc = ena_request_io_irq(adapter);
2124                 if (rc) {
2125                         ena_trace(ENA_ALERT, "err_req_irq");
2126                         goto err_req_irq;
2127                 }
2128
2129                 /* allocate transmit descriptors */
2130                 rc = ena_setup_all_tx_resources(adapter);
2131                 if (rc) {
2132                         ena_trace(ENA_ALERT, "err_setup_tx");
2133                         goto err_setup_tx;
2134                 }
2135
2136                 /* allocate receive descriptors */
2137                 rc = ena_setup_all_rx_resources(adapter);
2138                 if (rc) {
2139                         ena_trace(ENA_ALERT, "err_setup_rx");
2140                         goto err_setup_rx;
2141                 }
2142
2143                 /* create IO queues for Rx & Tx */
2144                 rc = ena_create_io_queues(adapter);
2145                 if (rc) {
2146                         ena_trace(ENA_ALERT,
2147                             "create IO queues failed");
2148                         goto err_io_que;
2149                 }
2150
2151                 if (adapter->link_status)
2152                         if_link_state_change(adapter->ifp, LINK_STATE_UP);
2153
2154                 rc = ena_up_complete(adapter);
2155                 if (rc)
2156                         goto err_up_complete;
2157
2158                 counter_u64_add(adapter->dev_stats.interface_up, 1);
2159
2160                 ena_update_hwassist(adapter);
2161
2162                 if_setdrvflagbits(adapter->ifp, IFF_DRV_RUNNING,
2163                     IFF_DRV_OACTIVE);
2164
2165                 callout_reset_sbt(&adapter->timer_service, SBT_1S, SBT_1S,
2166                     ena_timer_service, (void *)adapter, 0);
2167
2168                 taskqueue_enqueue(adapter->stats_tq, &adapter->stats_task);
2169
2170                 adapter->up = true;
2171         }
2172
2173         return (0);
2174
2175 err_up_complete:
2176         ena_destroy_all_io_queues(adapter);
2177 err_io_que:
2178         ena_free_all_rx_resources(adapter);
2179 err_setup_rx:
2180         ena_free_all_tx_resources(adapter);
2181 err_setup_tx:
2182         ena_free_io_irq(adapter);
2183 err_req_irq:
2184         return (rc);
2185 }
2186
2187 int
2188 ena_update_stats_counters(struct ena_adapter *adapter)
2189 {
2190         struct ena_admin_basic_stats ena_stats;
2191         struct ena_hw_stats *stats = &adapter->hw_stats;
2192         int rc = 0;
2193
2194         if (!adapter->up)
2195                 return (rc);
2196
2197         rc = ena_com_get_dev_basic_stats(adapter->ena_dev, &ena_stats);
2198         if (rc)
2199                 return (rc);
2200
2201         stats->tx_bytes = ((uint64_t)ena_stats.tx_bytes_high << 32) |
2202                 ena_stats.tx_bytes_low;
2203         stats->rx_bytes = ((uint64_t)ena_stats.rx_bytes_high << 32) |
2204                 ena_stats.rx_bytes_low;
2205
2206         stats->rx_packets = ((uint64_t)ena_stats.rx_pkts_high << 32) |
2207                 ena_stats.rx_pkts_low;
2208         stats->tx_packets = ((uint64_t)ena_stats.tx_pkts_high << 32) |
2209                 ena_stats.tx_pkts_low;
2210
2211         stats->rx_drops = ((uint64_t)ena_stats.rx_drops_high << 32) |
2212                 ena_stats.rx_drops_low;
2213
2214         return (0);
2215 }
2216
2217 static uint64_t
2218 ena_get_counter(if_t ifp, ift_counter cnt)
2219 {
2220         struct ena_adapter *adapter;
2221         struct ena_hw_stats *stats;
2222
2223         adapter = if_getsoftc(ifp);
2224         stats = &adapter->hw_stats;
2225
2226         switch (cnt) {
2227         case IFCOUNTER_IPACKETS:
2228                 return (stats->rx_packets);
2229         case IFCOUNTER_OPACKETS:
2230                 return (stats->tx_packets);
2231         case IFCOUNTER_IBYTES:
2232                 return (stats->rx_bytes);
2233         case IFCOUNTER_OBYTES:
2234                 return (stats->tx_bytes);
2235         case IFCOUNTER_IQDROPS:
2236                 return (stats->rx_drops);
2237         default:
2238                 return (if_get_counter_default(ifp, cnt));
2239         }
2240 }
2241
2242 static int
2243 ena_media_change(if_t ifp)
2244 {
2245         /* Media Change is not supported by firmware */
2246         return (0);
2247 }
2248
2249 static void
2250 ena_media_status(if_t ifp, struct ifmediareq *ifmr)
2251 {
2252         struct ena_adapter *adapter = if_getsoftc(ifp);
2253         ena_trace(ENA_DBG, "enter");
2254
2255         ENA_DEV_LOCK;
2256
2257         ifmr->ifm_status = IFM_AVALID;
2258         ifmr->ifm_active = IFM_ETHER;
2259
2260         if (!adapter->link_status) {
2261                 ENA_DEV_UNLOCK;
2262                 ena_trace(ENA_WARNING, "link_status = false");
2263                 return;
2264         }
2265
2266         ifmr->ifm_status |= IFM_ACTIVE;
2267         ifmr->ifm_active |= IFM_10G_T | IFM_FDX;
2268
2269         ENA_DEV_UNLOCK;
2270
2271         return;
2272 }
2273
2274 static void
2275 ena_init(void *arg)
2276 {
2277         struct ena_adapter *adapter = (struct ena_adapter *)arg;
2278
2279         if (adapter->up == false)
2280                 ena_up(adapter);
2281
2282         return;
2283 }
2284
2285 static int
2286 ena_ioctl(if_t ifp, u_long command, caddr_t data)
2287 {
2288         struct ena_adapter *adapter;
2289         struct ifreq *ifr;
2290         int rc;
2291
2292         adapter = ifp->if_softc;
2293         ifr = (struct ifreq *)data;
2294
2295         /*
2296          * Acquiring lock to prevent from running up and down routines parallel.
2297          */
2298         rc = 0;
2299         switch (command) {
2300         case SIOCSIFMTU:
2301                 sx_xlock(&adapter->ioctl_sx);
2302                 ena_down(adapter);
2303
2304                 ena_change_mtu(ifp, ifr->ifr_mtu);
2305
2306                 rc = ena_up(adapter);
2307                 sx_unlock(&adapter->ioctl_sx);
2308                 break;
2309
2310         case SIOCSIFFLAGS:
2311                 if (ifp->if_flags & IFF_UP) {
2312                         if ((ifp->if_drv_flags & IFF_DRV_RUNNING)) {
2313                                 if (ifp->if_flags & (IFF_PROMISC |
2314                                     IFF_ALLMULTI)) {
2315                                         device_printf(adapter->pdev,
2316                                             "ioctl promisc/allmulti\n");
2317                                 }
2318                         } else {
2319                                 sx_xlock(&adapter->ioctl_sx);
2320                                 rc = ena_up(adapter);
2321                                 sx_unlock(&adapter->ioctl_sx);
2322                         }
2323                 } else {
2324                         if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
2325                                 sx_xlock(&adapter->ioctl_sx);
2326                                 ena_down(adapter);
2327                                 sx_unlock(&adapter->ioctl_sx);
2328                         }
2329                 }
2330                 break;
2331
2332         case SIOCADDMULTI:
2333         case SIOCDELMULTI:
2334                 break;
2335
2336         case SIOCSIFMEDIA:
2337         case SIOCGIFMEDIA:
2338                 rc = ifmedia_ioctl(ifp, ifr, &adapter->media, command);
2339                 break;
2340
2341         case SIOCSIFCAP:
2342                 {
2343                         int reinit = 0;
2344
2345                         if (ifr->ifr_reqcap != ifp->if_capenable) {
2346                                 ifp->if_capenable = ifr->ifr_reqcap;
2347                                 reinit = 1;
2348                         }
2349
2350                         if (reinit && (ifp->if_drv_flags & IFF_DRV_RUNNING)) {
2351                                 sx_xlock(&adapter->ioctl_sx);
2352                                 ena_down(adapter);
2353                                 rc = ena_up(adapter);
2354                                 sx_unlock(&adapter->ioctl_sx);
2355                         }
2356                 }
2357
2358                 break;
2359         default:
2360                 rc = ether_ioctl(ifp, command, data);
2361                 break;
2362         }
2363
2364         return (rc);
2365 }
2366
2367 static int
2368 ena_get_dev_offloads(struct ena_com_dev_get_features_ctx *feat)
2369 {
2370         int caps = 0;
2371
2372         if (feat->offload.tx &
2373             (ENA_ADMIN_FEATURE_OFFLOAD_DESC_TX_L4_IPV4_CSUM_FULL_MASK |
2374             ENA_ADMIN_FEATURE_OFFLOAD_DESC_TX_L4_IPV4_CSUM_PART_MASK |
2375             ENA_ADMIN_FEATURE_OFFLOAD_DESC_TX_L3_CSUM_IPV4_MASK))
2376                 caps |= IFCAP_TXCSUM;
2377
2378         if (feat->offload.tx &
2379             (ENA_ADMIN_FEATURE_OFFLOAD_DESC_TX_L4_IPV6_CSUM_FULL_MASK |
2380             ENA_ADMIN_FEATURE_OFFLOAD_DESC_TX_L4_IPV6_CSUM_PART_MASK))
2381                 caps |= IFCAP_TXCSUM_IPV6;
2382
2383         if (feat->offload.tx & ENA_ADMIN_FEATURE_OFFLOAD_DESC_TSO_IPV4_MASK)
2384                 caps |= IFCAP_TSO4;
2385
2386         if (feat->offload.tx & ENA_ADMIN_FEATURE_OFFLOAD_DESC_TSO_IPV6_MASK)
2387                 caps |= IFCAP_TSO6;
2388
2389         if (feat->offload.rx_supported &
2390             (ENA_ADMIN_FEATURE_OFFLOAD_DESC_RX_L4_IPV4_CSUM_MASK |
2391             ENA_ADMIN_FEATURE_OFFLOAD_DESC_RX_L3_CSUM_IPV4_MASK))
2392                 caps |= IFCAP_RXCSUM;
2393
2394         if (feat->offload.rx_supported &
2395             ENA_ADMIN_FEATURE_OFFLOAD_DESC_RX_L4_IPV6_CSUM_MASK)
2396                 caps |= IFCAP_RXCSUM_IPV6;
2397
2398         caps |= IFCAP_LRO | IFCAP_JUMBO_MTU;
2399
2400         return (caps);
2401 }
2402
2403 static void
2404 ena_update_host_info(struct ena_admin_host_info *host_info, if_t ifp)
2405 {
2406
2407         host_info->supported_network_features[0] =
2408             (uint32_t)if_getcapabilities(ifp);
2409 }
2410
2411 static void
2412 ena_update_hwassist(struct ena_adapter *adapter)
2413 {
2414         if_t ifp = adapter->ifp;
2415         uint32_t feat = adapter->tx_offload_cap;
2416         int cap = if_getcapenable(ifp);
2417         int flags = 0;
2418
2419         if_clearhwassist(ifp);
2420
2421         if (cap & IFCAP_TXCSUM) {
2422                 if (feat & ENA_ADMIN_FEATURE_OFFLOAD_DESC_TX_L3_CSUM_IPV4_MASK)
2423                         flags |= CSUM_IP;
2424                 if (feat &
2425                     (ENA_ADMIN_FEATURE_OFFLOAD_DESC_TX_L4_IPV4_CSUM_FULL_MASK |
2426                     ENA_ADMIN_FEATURE_OFFLOAD_DESC_TX_L4_IPV4_CSUM_PART_MASK))
2427                         flags |= CSUM_IP_UDP | CSUM_IP_TCP;
2428         }
2429
2430         if (cap & IFCAP_TXCSUM_IPV6)
2431                 flags |= CSUM_IP6_UDP | CSUM_IP6_TCP;
2432
2433         if (cap & IFCAP_TSO4)
2434                 flags |= CSUM_IP_TSO;
2435
2436         if (cap & IFCAP_TSO6)
2437                 flags |= CSUM_IP6_TSO;
2438
2439         if_sethwassistbits(ifp, flags, 0);
2440 }
2441
2442 static int
2443 ena_setup_ifnet(device_t pdev, struct ena_adapter *adapter,
2444     struct ena_com_dev_get_features_ctx *feat)
2445 {
2446         if_t ifp;
2447         int caps = 0;
2448
2449         ena_trace(ENA_DBG, "enter");
2450
2451         ifp = adapter->ifp = if_gethandle(IFT_ETHER);
2452         if (ifp == 0) {
2453                 device_printf(pdev, "can not allocate ifnet structure\n");
2454                 return (ENXIO);
2455         }
2456         if_initname(ifp, device_get_name(pdev), device_get_unit(pdev));
2457         if_setdev(ifp, pdev);
2458         if_setsoftc(ifp, adapter);
2459
2460         if_setflags(ifp, IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST);
2461         if_setinitfn(ifp, ena_init);
2462         if_settransmitfn(ifp, ena_mq_start);
2463         if_setqflushfn(ifp, ena_qflush);
2464         if_setioctlfn(ifp, ena_ioctl);
2465         if_setgetcounterfn(ifp, ena_get_counter);
2466
2467         if_setsendqlen(ifp, adapter->tx_ring_size);
2468         if_setsendqready(ifp);
2469         if_setmtu(ifp, ETHERMTU);
2470         if_setbaudrate(ifp, 0);
2471         /* Zeroize capabilities... */
2472         if_setcapabilities(ifp, 0);
2473         if_setcapenable(ifp, 0);
2474         /* check hardware support */
2475         caps = ena_get_dev_offloads(feat);
2476         /* ... and set them */
2477         if_setcapabilitiesbit(ifp, caps, 0);
2478
2479         /* TSO parameters */
2480         ifp->if_hw_tsomax = ENA_TSO_MAXSIZE;
2481         ifp->if_hw_tsomaxsegcount = ENA_TSO_NSEGS;
2482         ifp->if_hw_tsomaxsegsize = MCLBYTES;
2483
2484         if_setifheaderlen(ifp, sizeof(struct ether_vlan_header));
2485         if_setcapenable(ifp, if_getcapabilities(ifp));
2486
2487         /*
2488          * Specify the media types supported by this adapter and register
2489          * callbacks to update media and link information
2490          */
2491         ifmedia_init(&adapter->media, IFM_IMASK,
2492             ena_media_change, ena_media_status);
2493         ifmedia_add(&adapter->media, IFM_ETHER | IFM_AUTO, 0, NULL);
2494         ifmedia_set(&adapter->media, IFM_ETHER | IFM_AUTO);
2495
2496         ether_ifattach(ifp, adapter->mac_addr);
2497
2498         return (0);
2499 }
2500
2501 static void
2502 ena_down(struct ena_adapter *adapter)
2503 {
2504
2505         if (adapter->up) {
2506                 device_printf(adapter->pdev, "device is going DOWN\n");
2507
2508                 callout_drain(&adapter->timer_service);
2509
2510                 adapter->up = false;
2511                 if_setdrvflagbits(adapter->ifp, IFF_DRV_OACTIVE,
2512                     IFF_DRV_RUNNING);
2513
2514                 /* Drain task responsible for updating hw stats */
2515                 while (taskqueue_cancel(adapter->stats_tq, &adapter->stats_task, NULL))
2516                         taskqueue_drain(adapter->stats_tq, &adapter->stats_task);
2517
2518                 ena_free_io_irq(adapter);
2519
2520                 ena_destroy_all_io_queues(adapter);
2521
2522                 ena_free_all_tx_bufs(adapter);
2523                 ena_free_all_rx_bufs(adapter);
2524                 ena_free_all_tx_resources(adapter);
2525                 ena_free_all_rx_resources(adapter);
2526
2527                 counter_u64_add(adapter->dev_stats.interface_down, 1);
2528         }
2529
2530         return;
2531 }
2532
2533 static void
2534 ena_tx_csum(struct ena_com_tx_ctx *ena_tx_ctx, struct mbuf *mbuf)
2535 {
2536         struct ena_com_tx_meta *ena_meta;
2537         struct ether_vlan_header *eh;
2538         u32 mss;
2539         bool offload;
2540         uint16_t etype;
2541         int ehdrlen;
2542         struct ip *ip;
2543         int iphlen;
2544         struct tcphdr *th;
2545
2546         offload = false;
2547         ena_meta = &ena_tx_ctx->ena_meta;
2548         mss = mbuf->m_pkthdr.tso_segsz;
2549
2550         if (mss != 0)
2551                 offload = true;
2552
2553         if ((mbuf->m_pkthdr.csum_flags & CSUM_TSO) != 0)
2554                 offload = true;
2555
2556         if ((mbuf->m_pkthdr.csum_flags & CSUM_OFFLOAD) != 0)
2557                 offload = true;
2558
2559         if (offload == false) {
2560                 ena_tx_ctx->meta_valid = 0;
2561                 return;
2562         }
2563
2564         /* Determine where frame payload starts. */
2565         eh = mtod(mbuf, struct ether_vlan_header *);
2566         if (eh->evl_encap_proto == htons(ETHERTYPE_VLAN)) {
2567                 etype = ntohs(eh->evl_proto);
2568                 ehdrlen = ETHER_HDR_LEN + ETHER_VLAN_ENCAP_LEN;
2569         } else {
2570                 etype = ntohs(eh->evl_encap_proto);
2571                 ehdrlen = ETHER_HDR_LEN;
2572         }
2573
2574         ip = (struct ip *)(mbuf->m_data + ehdrlen);
2575         iphlen = ip->ip_hl << 2;
2576         th = (struct tcphdr *)((caddr_t)ip + iphlen);
2577
2578         if ((mbuf->m_pkthdr.csum_flags & CSUM_IP) != 0) {
2579                 ena_tx_ctx->l3_csum_enable = 1;
2580         }
2581         if ((mbuf->m_pkthdr.csum_flags & CSUM_TSO) != 0) {
2582                 ena_tx_ctx->tso_enable = 1;
2583                 ena_meta->l4_hdr_len = (th->th_off);
2584         }
2585
2586         switch (etype) {
2587         case ETHERTYPE_IP:
2588                 ena_tx_ctx->l3_proto = ENA_ETH_IO_L3_PROTO_IPV4;
2589                 if (ip->ip_off == 0)
2590                         ena_tx_ctx->df = 1;
2591                 break;
2592         case ETHERTYPE_IPV6:
2593                 ena_tx_ctx->l3_proto = ENA_ETH_IO_L3_PROTO_IPV6;
2594
2595         default:
2596                 break;
2597         }
2598
2599         if (ip->ip_p == IPPROTO_TCP) {
2600                 ena_tx_ctx->l4_proto = ENA_ETH_IO_L4_PROTO_TCP;
2601                 if (mbuf->m_pkthdr.csum_flags & (CSUM_IP_TCP | CSUM_IP6_TCP))
2602                     ena_tx_ctx->l4_csum_enable = 1;
2603                 else
2604                     ena_tx_ctx->l4_csum_enable = 0;
2605         } else if (ip->ip_p == IPPROTO_UDP) {
2606                 ena_tx_ctx->l4_proto = ENA_ETH_IO_L4_PROTO_UDP;
2607                 if (mbuf->m_pkthdr.csum_flags & (CSUM_IP_UDP | CSUM_IP6_UDP))
2608                     ena_tx_ctx->l4_csum_enable = 1;
2609                 else
2610                     ena_tx_ctx->l4_csum_enable = 0;
2611         } else {
2612                 ena_tx_ctx->l4_proto = ENA_ETH_IO_L4_PROTO_UNKNOWN;
2613                 ena_tx_ctx->l4_csum_enable = 0;
2614         }
2615
2616         ena_meta->mss = mss;
2617         ena_meta->l3_hdr_len = iphlen;
2618         ena_meta->l3_hdr_offset = ehdrlen;
2619         ena_tx_ctx->meta_valid = 1;
2620 }
2621
2622 static int
2623 ena_check_and_defragment_mbuf(struct ena_ring *tx_ring, struct mbuf **mbuf)
2624 {
2625         struct ena_adapter *adapter;
2626         struct mbuf *defrag_mbuf;
2627         int num_frags;
2628
2629         adapter = tx_ring->adapter;
2630         num_frags = ena_mbuf_count(*mbuf);
2631
2632         /* One segment must be reserved for configuration descriptor. */
2633         if (num_frags < adapter->max_tx_sgl_size)
2634                 return (0);
2635         counter_u64_add(tx_ring->tx_stats.defragment, 1);
2636
2637         defrag_mbuf = m_defrag(*mbuf, M_NOWAIT);
2638         if (defrag_mbuf == NULL) {
2639                 counter_u64_add(tx_ring->tx_stats.defragment_err, 1);
2640                 return (ENOMEM);
2641         }
2642
2643         /* If mbuf was defragmented succesfully, original mbuf is released. */
2644         *mbuf = defrag_mbuf;
2645
2646         return (0);
2647 }
2648
2649 static int
2650 ena_xmit_mbuf(struct ena_ring *tx_ring, struct mbuf **mbuf)
2651 {
2652         struct ena_adapter *adapter;
2653         struct ena_tx_buffer *tx_info;
2654         struct ena_com_tx_ctx ena_tx_ctx;
2655         struct ena_com_dev *ena_dev;
2656         struct ena_com_buf *ena_buf;
2657         struct ena_com_io_sq* io_sq;
2658         bus_dma_segment_t segs[ENA_BUS_DMA_SEGS];
2659         void *push_hdr;
2660         uint16_t next_to_use;
2661         uint16_t req_id;
2662         uint16_t push_len;
2663         uint16_t ena_qid;
2664         uint32_t len, nsegs, header_len;
2665         int i, rc;
2666         int nb_hw_desc;
2667
2668         ena_qid = ENA_IO_TXQ_IDX(tx_ring->que->id);
2669         adapter = tx_ring->que->adapter;
2670         ena_dev = adapter->ena_dev;
2671         io_sq = &adapter->ena_dev->io_sq_queues[ena_qid];
2672
2673         ENA_ASSERT(*mbuf, "mbuf is NULL\n");
2674
2675         rc = ena_check_and_defragment_mbuf(tx_ring, mbuf);
2676         if (rc) {
2677                 ena_trace(ENA_WARNING,
2678                     "Failed to defragment mbuf! err: %d", rc);
2679                 return (rc);
2680         }
2681
2682         next_to_use = tx_ring->next_to_use;
2683         req_id = tx_ring->free_tx_ids[next_to_use];
2684         tx_info = &tx_ring->tx_buffer_info[req_id];
2685
2686         tx_info->mbuf = *mbuf;
2687         tx_info->num_of_bufs = 0;
2688
2689         ena_buf = tx_info->bufs;
2690         len = (*mbuf)->m_len;
2691
2692         ena_trace(ENA_DBG | ENA_TXPTH, "Tx: %d bytes", (*mbuf)->m_pkthdr.len);
2693
2694         push_len = 0;
2695         header_len = min_t(uint32_t, len, tx_ring->tx_max_header_size);
2696         push_hdr = NULL;
2697
2698         rc = bus_dmamap_load_mbuf_sg(adapter->tx_buf_tag, tx_info->map,
2699             *mbuf, segs, &nsegs, BUS_DMA_NOWAIT);
2700
2701         if (rc || (nsegs == 0)) {
2702                 ena_trace(ENA_WARNING,
2703                     "dmamap load failed! err: %d nsegs: %d", rc, nsegs);
2704                 counter_u64_add(tx_ring->tx_stats.dma_mapping_err, 1);
2705                 tx_info->mbuf = NULL;
2706                 if (rc == ENOMEM)
2707                         return (ENA_COM_NO_MEM);
2708                 else
2709                         return (ENA_COM_INVAL);
2710         }
2711
2712         for (i = 0; i < nsegs; i++) {
2713                 ena_buf->len = segs[i].ds_len;
2714                 ena_buf->paddr = segs[i].ds_addr;
2715                 ena_buf++;
2716         }
2717         tx_info->num_of_bufs = nsegs;
2718
2719         memset(&ena_tx_ctx, 0x0, sizeof(struct ena_com_tx_ctx));
2720         ena_tx_ctx.ena_bufs = tx_info->bufs;
2721         ena_tx_ctx.push_header = push_hdr;
2722         ena_tx_ctx.num_bufs = tx_info->num_of_bufs;
2723         ena_tx_ctx.req_id = req_id;
2724         ena_tx_ctx.header_len = header_len;
2725
2726         /* Set flags and meta data */
2727         ena_tx_csum(&ena_tx_ctx, *mbuf);
2728         /* Prepare the packet's descriptors and send them to device */
2729         rc = ena_com_prepare_tx(io_sq, &ena_tx_ctx, &nb_hw_desc);
2730         if (rc != 0) {
2731                 ena_trace(ENA_WARNING, "failed to prepare tx bufs\n");
2732                 counter_enter();
2733                 counter_u64_add_protected(tx_ring->tx_stats.queue_stop, 1);
2734                 counter_u64_add_protected(tx_ring->tx_stats.prepare_ctx_err, 1);
2735                 counter_exit();
2736                 goto dma_error;
2737         }
2738
2739         counter_enter();
2740         counter_u64_add_protected(tx_ring->tx_stats.cnt, 1);
2741         counter_u64_add_protected(tx_ring->tx_stats.bytes,  (*mbuf)->m_pkthdr.len);
2742         counter_exit();
2743
2744         tx_info->tx_descs = nb_hw_desc;
2745         getbinuptime(&tx_info->timestamp);
2746         tx_info->print_once = true;
2747
2748         tx_ring->next_to_use = ENA_TX_RING_IDX_NEXT(next_to_use,
2749             tx_ring->ring_size);
2750
2751         bus_dmamap_sync(adapter->tx_buf_tag, tx_info->map, BUS_DMASYNC_PREWRITE);
2752
2753         return (0);
2754
2755 dma_error:
2756         tx_info->mbuf = NULL;
2757         bus_dmamap_unload(adapter->tx_buf_tag, tx_info->map);
2758
2759         return (rc);
2760 }
2761
2762 static void
2763 ena_start_xmit(struct ena_ring *tx_ring)
2764 {
2765         struct mbuf *mbuf;
2766         struct ena_adapter *adapter = tx_ring->adapter;
2767         struct ena_com_io_sq* io_sq;
2768         int ena_qid;
2769         int acum_pkts = 0;
2770         int ret = 0;
2771
2772         if ((adapter->ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
2773                 return;
2774
2775         if (!adapter->link_status)
2776                 return;
2777
2778         ena_qid = ENA_IO_TXQ_IDX(tx_ring->que->id);
2779         io_sq = &adapter->ena_dev->io_sq_queues[ena_qid];
2780
2781         while ((mbuf = drbr_peek(adapter->ifp, tx_ring->br)) != NULL) {
2782                 ena_trace(ENA_DBG | ENA_TXPTH, "\ndequeued mbuf %p with flags %#x and"
2783                     " header csum flags %#jx",
2784                     mbuf, mbuf->m_flags, mbuf->m_pkthdr.csum_flags);
2785
2786                 if (ena_com_sq_empty_space(io_sq) < ENA_TX_CLEANUP_TRESHOLD)
2787                         ena_tx_cleanup(tx_ring);
2788
2789                 if ((ret = ena_xmit_mbuf(tx_ring, &mbuf)) != 0) {
2790                         if (ret == ENA_COM_NO_MEM) {
2791                                 drbr_putback(adapter->ifp, tx_ring->br, mbuf);
2792                         } else if (ret == ENA_COM_NO_SPACE) {
2793                                 drbr_putback(adapter->ifp, tx_ring->br, mbuf);
2794                         } else {
2795                                 m_freem(mbuf);
2796                                 drbr_advance(adapter->ifp, tx_ring->br);
2797                         }
2798
2799                         break;
2800                 }
2801
2802                 if ((adapter->ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
2803                         return;
2804
2805                 drbr_advance(adapter->ifp, tx_ring->br);
2806                 acum_pkts++;
2807
2808                 BPF_MTAP(adapter->ifp, mbuf);
2809
2810                 if (acum_pkts == DB_THRESHOLD) {
2811                         acum_pkts = 0;
2812                         wmb();
2813                         /* Trigger the dma engine */
2814                         ena_com_write_sq_doorbell(io_sq);
2815                         counter_u64_add(tx_ring->tx_stats.doorbells, 1);
2816                 }
2817
2818         }
2819
2820         if (acum_pkts) {
2821                 wmb();
2822                 /* Trigger the dma engine */
2823                 ena_com_write_sq_doorbell(io_sq);
2824                 counter_u64_add(tx_ring->tx_stats.doorbells, 1);
2825         }
2826
2827         if (ena_com_sq_empty_space(io_sq) < ENA_TX_CLEANUP_TRESHOLD)
2828                 ena_tx_cleanup(tx_ring);
2829 }
2830
2831 static void
2832 ena_deferred_mq_start(void *arg, int pending)
2833 {
2834         struct ena_ring *tx_ring = (struct ena_ring *)arg;
2835         struct ifnet *ifp = tx_ring->adapter->ifp;
2836
2837         while (drbr_empty(ifp, tx_ring->br) == FALSE &&
2838             (ifp->if_drv_flags & IFF_DRV_RUNNING) != 0) {
2839                 ENA_RING_MTX_LOCK(tx_ring);
2840                 ena_start_xmit(tx_ring);
2841                 ENA_RING_MTX_UNLOCK(tx_ring);
2842         }
2843 }
2844
2845 static int
2846 ena_mq_start(if_t ifp, struct mbuf *m)
2847 {
2848         struct ena_adapter *adapter = ifp->if_softc;
2849         struct ena_ring *tx_ring;
2850         int ret, is_drbr_empty;
2851         uint32_t i;
2852
2853         if ((adapter->ifp->if_drv_flags & IFF_DRV_RUNNING) == 0)
2854                 return (ENODEV);
2855
2856         /* Which queue to use */
2857         /*
2858          * If everything is setup correctly, it should be the
2859          * same bucket that the current CPU we're on is.
2860          * It should improve performance.
2861          */
2862         if (M_HASHTYPE_GET(m) != M_HASHTYPE_NONE) {
2863 #ifdef  RSS
2864                 if (rss_hash2bucket(m->m_pkthdr.flowid,
2865                     M_HASHTYPE_GET(m), &i) == 0) {
2866                         i = i % adapter->num_queues;
2867
2868                 } else
2869 #endif
2870                 {
2871                         i = m->m_pkthdr.flowid % adapter->num_queues;
2872                 }
2873         } else {
2874                 i = curcpu % adapter->num_queues;
2875         }
2876         tx_ring = &adapter->tx_ring[i];
2877
2878         /* Check if drbr is empty before putting packet */
2879         is_drbr_empty = drbr_empty(ifp, tx_ring->br);
2880         ret = drbr_enqueue(ifp, tx_ring->br, m);
2881         if (ret) {
2882                 taskqueue_enqueue(tx_ring->enqueue_tq, &tx_ring->enqueue_task);
2883                 return (ret);
2884         }
2885
2886         if (is_drbr_empty && ENA_RING_MTX_TRYLOCK(tx_ring)) {
2887                 ena_start_xmit(tx_ring);
2888                 ENA_RING_MTX_UNLOCK(tx_ring);
2889         } else {
2890                 taskqueue_enqueue(tx_ring->enqueue_tq, &tx_ring->enqueue_task);
2891         }
2892
2893         return (0);
2894 }
2895
2896 static void
2897 ena_qflush(if_t ifp)
2898 {
2899         struct ena_adapter *adapter = ifp->if_softc;
2900         struct ena_ring *tx_ring = adapter->tx_ring;
2901         int i;
2902
2903         for(i = 0; i < adapter->num_queues; ++i, ++tx_ring)
2904                 if (drbr_empty(ifp, tx_ring->br) == FALSE) {
2905                         ENA_RING_MTX_LOCK(tx_ring);
2906                         drbr_flush(ifp, tx_ring->br);
2907                         ENA_RING_MTX_UNLOCK(tx_ring);
2908                 }
2909
2910         if_qflush(ifp);
2911
2912         return;
2913 }
2914
2915 static int ena_calc_io_queue_num(struct ena_adapter *adapter,
2916     struct ena_com_dev_get_features_ctx *get_feat_ctx)
2917 {
2918         int io_sq_num, io_cq_num, io_queue_num;
2919
2920         io_sq_num = get_feat_ctx->max_queues.max_sq_num;
2921         io_cq_num = get_feat_ctx->max_queues.max_sq_num;
2922
2923         io_queue_num = min_t(int, mp_ncpus, ENA_MAX_NUM_IO_QUEUES);
2924         io_queue_num = min_t(int, io_queue_num, io_sq_num);
2925         io_queue_num = min_t(int, io_queue_num, io_cq_num);
2926         /* 1 IRQ for for mgmnt and 1 IRQ for each TX/RX pair */
2927         io_queue_num = min_t(int, io_queue_num,
2928             pci_msix_count(adapter->pdev) - 1);
2929 #ifdef  RSS
2930         io_queue_num = min_t(int, io_queue_num, rss_getnumbuckets());
2931 #endif
2932
2933         return io_queue_num;
2934 }
2935
2936 static int ena_calc_queue_size(struct ena_adapter *adapter,
2937     uint16_t *max_tx_sgl_size,  uint16_t *max_rx_sgl_size,
2938     struct ena_com_dev_get_features_ctx *feat)
2939 {
2940         uint32_t queue_size = ENA_DEFAULT_RING_SIZE;
2941         uint32_t v;
2942         uint32_t q;
2943
2944         queue_size = min_t(uint32_t, queue_size,
2945             feat->max_queues.max_cq_depth);
2946         queue_size = min_t(uint32_t, queue_size,
2947             feat->max_queues.max_sq_depth);
2948
2949         /* round down to the nearest power of 2 */
2950         v = queue_size;
2951         while (v != 0) {
2952                 if (powerof2(queue_size))
2953                         break;
2954                 v /= 2;
2955                 q = rounddown2(queue_size, v);
2956                 if (q != 0) {
2957                         queue_size = q;
2958                         break;
2959                 }
2960         }
2961
2962         if (unlikely(!queue_size)) {
2963                 device_printf(adapter->pdev, "Invalid queue size\n");
2964                 return ENA_COM_FAULT;
2965         }
2966
2967         *max_tx_sgl_size = min_t(uint16_t, ENA_PKT_MAX_BUFS,
2968             feat->max_queues.max_packet_tx_descs);
2969         *max_rx_sgl_size = min_t(uint16_t, ENA_PKT_MAX_BUFS,
2970             feat->max_queues.max_packet_rx_descs);
2971
2972         return queue_size;
2973 }
2974
2975 static int ena_rss_init_default(struct ena_adapter *adapter)
2976 {
2977         struct ena_com_dev *ena_dev = adapter->ena_dev;
2978         device_t dev = adapter->pdev;
2979         int qid, rc, i;
2980
2981         rc = ena_com_rss_init(ena_dev, ENA_RX_RSS_TABLE_LOG_SIZE);
2982         if (unlikely(rc)) {
2983                 device_printf(dev, "Cannot init RSS\n");
2984                 goto err_rss_init;
2985         }
2986
2987         for (i = 0; i < ENA_RX_RSS_TABLE_SIZE; i++) {
2988 #ifdef  RSS
2989                 qid = rss_get_indirection_to_bucket(i);
2990                 qid = qid % adapter->num_queues;
2991 #else
2992                 qid = i % adapter->num_queues;
2993 #endif
2994                 rc = ena_com_indirect_table_fill_entry(ena_dev, i,
2995                                                        ENA_IO_RXQ_IDX(qid));
2996                 if (unlikely(rc && (rc != EPERM))) {
2997                         device_printf(dev, "Cannot fill indirect table\n");
2998                         goto err_fill_indir;
2999                 }
3000         }
3001
3002         rc = ena_com_fill_hash_function(ena_dev, ENA_ADMIN_CRC32, NULL,
3003                                         ENA_HASH_KEY_SIZE, 0xFFFFFFFF);
3004         if (unlikely(rc && (rc != EPERM))) {
3005                 device_printf(dev, "Cannot fill hash function\n");
3006                 goto err_fill_indir;
3007         }
3008
3009         rc = ena_com_set_default_hash_ctrl(ena_dev);
3010         if (unlikely(rc && (rc != EPERM))) {
3011                 device_printf(dev, "Cannot fill hash control\n");
3012                 goto err_fill_indir;
3013         }
3014
3015         return (0);
3016
3017 err_fill_indir:
3018         ena_com_rss_destroy(ena_dev);
3019 err_rss_init:
3020         return (rc);
3021 }
3022
3023 static void
3024 ena_rss_init_default_deferred(void *arg)
3025 {
3026         struct ena_adapter *adapter;
3027         devclass_t dc;
3028         int max;
3029         int rc;
3030
3031         dc = devclass_find("ena");
3032         if (dc == NULL) {
3033                 ena_trace(ENA_DBG, "No devclass ena\n");
3034                 return;
3035         }
3036
3037         max = devclass_get_maxunit(dc);
3038         while (max-- >= 0) {
3039                 adapter = devclass_get_softc(dc, max);
3040                 if (adapter != NULL) {
3041                         rc = ena_rss_init_default(adapter);
3042                         adapter->rss_support = true;
3043                         if (rc) {
3044                                 device_printf(adapter->pdev,
3045                                     "WARNING: RSS was not properly initialized,"
3046                                     " it will affect bandwith\n");
3047                                 adapter->rss_support = false;
3048                         }
3049                 }
3050         }
3051 }
3052 SYSINIT(ena_rss_init, SI_SUB_KICK_SCHEDULER, SI_ORDER_SECOND, ena_rss_init_default_deferred, NULL);
3053
3054 static void ena_config_host_info(struct ena_com_dev *ena_dev)
3055 {
3056         struct ena_admin_host_info *host_info;
3057         int rc;
3058
3059         /* Allocate only the host info */
3060         rc = ena_com_allocate_host_info(ena_dev);
3061         if (rc) {
3062                 ena_trace(ENA_ALERT, "Cannot allocate host info\n");
3063                 return;
3064         }
3065
3066         host_info = ena_dev->host_attr.host_info;
3067
3068         host_info->os_type = ENA_ADMIN_OS_FREEBSD;
3069         host_info->kernel_ver = osreldate;
3070
3071         sprintf(host_info->kernel_ver_str, "%d", osreldate);
3072         host_info->os_dist = 0;
3073         strncpy(host_info->os_dist_str, osrelease,
3074             sizeof(host_info->os_dist_str) - 1);
3075
3076         host_info->driver_version =
3077                 (DRV_MODULE_VER_MAJOR) |
3078                 (DRV_MODULE_VER_MINOR << ENA_ADMIN_HOST_INFO_MINOR_SHIFT) |
3079                 (DRV_MODULE_VER_SUBMINOR << ENA_ADMIN_HOST_INFO_SUB_MINOR_SHIFT);
3080
3081         rc = ena_com_set_host_attributes(ena_dev);
3082         if (rc) {
3083                 if (rc == EPERM)
3084                         ena_trace(ENA_WARNING, "Cannot set host attributes\n");
3085                 else
3086                         ena_trace(ENA_ALERT, "Cannot set host attributes\n");
3087
3088                 goto err;
3089         }
3090
3091         return;
3092
3093 err:
3094         ena_com_delete_host_info(ena_dev);
3095 }
3096
3097 static int
3098 ena_device_init(struct ena_adapter *adapter, device_t pdev,
3099         struct ena_com_dev_get_features_ctx *get_feat_ctx, int *wd_active)
3100 {
3101         struct ena_com_dev* ena_dev = adapter->ena_dev;
3102         bool readless_supported;
3103         uint32_t aenq_groups;
3104         int dma_width;
3105         int rc;
3106
3107         rc = ena_com_mmio_reg_read_request_init(ena_dev);
3108         if (rc) {
3109                 device_printf(pdev, "failed to init mmio read less\n");
3110                 return rc;
3111         }
3112
3113         /*
3114          * The PCIe configuration space revision id indicate if mmio reg
3115          * read is disabled
3116          */
3117         readless_supported = !(pci_get_revid(pdev) & ENA_MMIO_DISABLE_REG_READ);
3118         ena_com_set_mmio_read_mode(ena_dev, readless_supported);
3119
3120         rc = ena_com_dev_reset(ena_dev);
3121         if (rc) {
3122                 device_printf(pdev, "Can not reset device\n");
3123                 goto err_mmio_read_less;
3124         }
3125
3126         rc = ena_com_validate_version(ena_dev);
3127         if (rc) {
3128                 device_printf(pdev, "device version is too low\n");
3129                 goto err_mmio_read_less;
3130         }
3131
3132         dma_width = ena_com_get_dma_width(ena_dev);
3133         if (dma_width < 0) {
3134                 device_printf(pdev, "Invalid dma width value %d", dma_width);
3135                 rc = dma_width;
3136                 goto err_mmio_read_less;
3137         }
3138         adapter->dma_width = dma_width;
3139
3140         /* ENA admin level init */
3141         rc = ena_com_admin_init(ena_dev, &aenq_handlers, true);
3142         if (rc) {
3143                 device_printf(pdev,
3144                     "Can not initialize ena admin queue with device\n");
3145                 goto err_mmio_read_less;
3146         }
3147
3148         /*
3149          * To enable the msix interrupts the driver needs to know the number
3150          * of queues. So the driver uses polling mode to retrieve this
3151          * information
3152          */
3153         ena_com_set_admin_polling_mode(ena_dev, true);
3154
3155         ena_config_host_info(ena_dev);
3156
3157         /* Get Device Attributes */
3158         rc = ena_com_get_dev_attr_feat(ena_dev, get_feat_ctx);
3159         if (rc) {
3160                 device_printf(pdev,
3161                     "Cannot get attribute for ena device rc: %d\n", rc);
3162                 goto err_admin_init;
3163         }
3164
3165         aenq_groups = BIT(ENA_ADMIN_LINK_CHANGE) |
3166             BIT(ENA_ADMIN_FATAL_ERROR) |
3167             BIT(ENA_ADMIN_WARNING) |
3168             BIT(ENA_ADMIN_NOTIFICATION) |
3169             BIT(ENA_ADMIN_KEEP_ALIVE);
3170
3171         aenq_groups &= get_feat_ctx->aenq.supported_groups;
3172         rc = ena_com_set_aenq_config(ena_dev, aenq_groups);
3173         if (rc) {
3174                 device_printf(pdev, "Cannot configure aenq groups rc: %d\n", rc);
3175                 goto err_admin_init;
3176         }
3177
3178         *wd_active = !!(aenq_groups & BIT(ENA_ADMIN_KEEP_ALIVE));
3179
3180         return 0;
3181
3182 err_admin_init:
3183         ena_com_delete_host_info(ena_dev);
3184         ena_com_admin_destroy(ena_dev);
3185 err_mmio_read_less:
3186         ena_com_mmio_reg_read_request_destroy(ena_dev);
3187
3188         return rc;
3189 }
3190
3191 static int ena_enable_msix_and_set_admin_interrupts(struct ena_adapter *adapter,
3192     int io_vectors)
3193 {
3194         struct ena_com_dev *ena_dev = adapter->ena_dev;
3195         int rc;
3196
3197         rc = ena_enable_msix(adapter);
3198         if (rc) {
3199                 device_printf(adapter->pdev, "Error with MSI-X enablement\n");
3200                 return rc;
3201         }
3202
3203         ena_setup_mgmnt_intr(adapter);
3204
3205         rc = ena_request_mgmnt_irq(adapter);
3206         if (rc) {
3207                 device_printf(adapter->pdev, "Cannot setup mgmnt queue intr\n");
3208                 goto err_disable_msix;
3209         }
3210
3211         ena_com_set_admin_polling_mode(ena_dev, false);
3212
3213         ena_com_admin_aenq_enable(ena_dev);
3214
3215         return 0;
3216
3217 err_disable_msix:
3218         ena_disable_msix(adapter);
3219
3220         return rc;
3221 }
3222
3223 /* Function called on ENA_ADMIN_KEEP_ALIVE event */
3224 static void ena_keep_alive_wd(void *adapter_data,
3225     struct ena_admin_aenq_entry *aenq_e)
3226 {
3227         struct ena_adapter *adapter = (struct ena_adapter *)adapter_data;
3228         sbintime_t stime;
3229
3230         stime = getsbinuptime();
3231         atomic_store_rel_64(&adapter->keep_alive_timestamp, stime);
3232 }
3233
3234 /* Check for keep alive expiration */
3235 static void check_for_missing_keep_alive(struct ena_adapter *adapter)
3236 {
3237         sbintime_t timestamp, time;
3238
3239         if (adapter->wd_active == 0)
3240                 return;
3241
3242         if (adapter->keep_alive_timeout == 0)
3243                 return;
3244
3245         timestamp = atomic_load_acq_64(&adapter->keep_alive_timestamp);
3246         time = getsbinuptime() - timestamp;
3247         if (unlikely(time > adapter->keep_alive_timeout)) {
3248                 device_printf(adapter->pdev,
3249                     "Keep alive watchdog timeout.\n");
3250                 counter_u64_add(adapter->dev_stats.wd_expired, 1);
3251                 adapter->trigger_reset = true;
3252         }
3253 }
3254
3255 /* Check if admin queue is enabled */
3256 static void check_for_admin_com_state(struct ena_adapter *adapter)
3257 {
3258         if (unlikely(!ena_com_get_admin_running_state(adapter->ena_dev))) {
3259                 device_printf(adapter->pdev,
3260                     "ENA admin queue is not in running state!\n");
3261                 counter_u64_add(adapter->dev_stats.admin_q_pause, 1);
3262                 adapter->trigger_reset = true;
3263         }
3264 }
3265
3266 /*
3267  * Check for TX which were not completed on time.
3268  * Timeout is defined by "missing_tx_timeout".
3269  * Reset will be performed if number of incompleted
3270  * transactions exceeds "missing_tx_threshold".
3271  */
3272 static void check_for_missing_tx_completions(struct ena_adapter *adapter)
3273 {
3274         struct ena_ring *tx_ring;
3275         struct ena_tx_buffer *tx_info;
3276         struct bintime curtime, time;
3277         int i, j, budget, missed_tx;
3278
3279         /* Make sure the driver doesn't turn the device in other process */
3280         rmb();
3281
3282         if (!adapter->up)
3283                 return;
3284
3285         if (adapter->trigger_reset)
3286                 return;
3287
3288         if (adapter->missing_tx_timeout == 0)
3289                 return;
3290
3291         budget = adapter->missing_tx_max_queues;
3292         getbinuptime(&curtime);
3293
3294         for (i = adapter->next_monitored_tx_qid; i < adapter->num_queues; i++) {
3295                 tx_ring = &adapter->tx_ring[i];
3296
3297                 missed_tx = 0;
3298
3299                 for (j = 0; j < tx_ring->ring_size; j++) {
3300                         tx_info = &tx_ring->tx_buffer_info[j];
3301
3302                         if (!bintime_isset(&tx_info->timestamp))
3303                                 continue;
3304
3305                         time = curtime;
3306                         bintime_sub(&time, &tx_info->timestamp);
3307
3308                         /* Check again if packet is still waiting */
3309                         if (bintime_isset(&tx_info->timestamp) && unlikely(
3310                             bttosbt(time) > adapter->missing_tx_timeout)) {
3311                                 if (tx_info->print_once)
3312                                         device_printf(adapter->pdev,
3313                                             "Found a Tx that wasn't completed "
3314                                             "on time, qid %d, index %d.\n",
3315                                             tx_ring->qid, j);
3316
3317                                 tx_info->print_once = false;
3318                                 missed_tx++;
3319
3320                                 if (unlikely(missed_tx >
3321                                     adapter->missing_tx_threshold)) {
3322                                         device_printf(adapter->pdev,
3323                                             "The number of lost tx completion "
3324                                             "is above the threshold (%d > %d). "
3325                                             "Reset the device\n", missed_tx,
3326                                             adapter->missing_tx_threshold);
3327                                         adapter->trigger_reset = true;
3328                                         return;
3329                                 }
3330                         }
3331                 }
3332
3333                 budget--;
3334                 if (!budget) {
3335                         i++;
3336                         break;
3337                 }
3338         }
3339
3340         adapter->next_monitored_tx_qid = i % adapter->num_queues;
3341 }
3342
3343
3344 static void
3345 ena_timer_service(void *data)
3346 {
3347         struct ena_adapter *adapter = (struct ena_adapter *)data;
3348         struct ena_admin_host_info *host_info =
3349             adapter->ena_dev->host_attr.host_info;
3350
3351         check_for_missing_keep_alive(adapter);
3352
3353         check_for_admin_com_state(adapter);
3354
3355         check_for_missing_tx_completions(adapter);
3356
3357         if (host_info)
3358                 ena_update_host_info(host_info, adapter->ifp);
3359
3360         if (unlikely(adapter->trigger_reset)) {
3361                 device_printf(adapter->pdev, "Trigger reset is on\n");
3362                 taskqueue_enqueue(adapter->reset_tq, &adapter->reset_task);
3363                 return;
3364         }
3365
3366         /*
3367          * Schedule another timeout one second from now.
3368          */
3369         callout_schedule_sbt(&adapter->timer_service, SBT_1S, SBT_1S, 0);
3370 }
3371
3372 static void
3373 ena_reset_task(void *arg, int pending)
3374 {
3375         struct ena_com_dev_get_features_ctx get_feat_ctx;
3376         struct ena_adapter *adapter = (struct ena_adapter *)arg;
3377         struct ena_com_dev *ena_dev = adapter->ena_dev;
3378         bool dev_up;
3379         int rc;
3380
3381         if (unlikely(!adapter->trigger_reset)) {
3382                 device_printf(adapter->pdev,
3383                     "device reset scheduled but trigger_reset is off\n");
3384                 return;
3385         }
3386
3387         sx_xlock(&adapter->ioctl_sx);
3388
3389         callout_drain(&adapter->timer_service);
3390
3391         dev_up = adapter->up;
3392
3393         ena_com_set_admin_running_state(ena_dev, false);
3394         ena_free_mgmnt_irq(adapter);
3395         ena_down(adapter);
3396         ena_com_dev_reset(ena_dev);
3397         ena_disable_msix(adapter);
3398         ena_com_abort_admin_commands(ena_dev);
3399         ena_com_wait_for_abort_completion(ena_dev);
3400         ena_com_admin_destroy(ena_dev);
3401         ena_com_mmio_reg_read_request_destroy(ena_dev);
3402
3403         adapter->trigger_reset = false;
3404
3405         /* Finished destroy part. Restart the device */
3406         rc = ena_device_init(adapter, adapter->pdev, &get_feat_ctx,
3407             &adapter->wd_active);
3408         if (rc) {
3409                 device_printf(adapter->pdev,
3410                     "ENA device init failed! (err: %d)\n", rc);
3411                 goto err_dev_free;
3412         }
3413
3414         rc = ena_enable_msix_and_set_admin_interrupts(adapter,
3415             adapter->num_queues);
3416         if (rc) {
3417                 device_printf(adapter->pdev, "Enable MSI-X failed\n");
3418                 goto err_com_free;
3419         }
3420
3421         /* If the interface was up before the reset bring it up */
3422         if (dev_up) {
3423                 rc = ena_up(adapter);
3424                 if (rc) {
3425                         device_printf(adapter->pdev,
3426                             "Failed to create I/O queues\n");
3427                         goto err_msix_free;
3428                 }
3429         }
3430
3431         callout_reset_sbt(&adapter->timer_service, SBT_1S, SBT_1S,
3432             ena_timer_service, (void *)adapter, 0);
3433
3434         sx_unlock(&adapter->ioctl_sx);
3435
3436         return;
3437
3438 err_msix_free:
3439         ena_com_dev_reset(ena_dev);
3440         ena_free_mgmnt_irq(adapter);
3441         ena_disable_msix(adapter);
3442 err_com_free:
3443         ena_com_admin_destroy(ena_dev);
3444 err_dev_free:
3445         device_printf(adapter->pdev, "ENA reset failed!\n");
3446         adapter->running = false;
3447         sx_unlock(&adapter->ioctl_sx);
3448 }
3449
3450 /**
3451  * ena_attach - Device Initialization Routine
3452  * @pdev: device information struct
3453  *
3454  * Returns 0 on success, otherwise on failure.
3455  *
3456  * ena_attach initializes an adapter identified by a device structure.
3457  * The OS initialization, configuring of the adapter private structure,
3458  * and a hardware reset occur.
3459  **/
3460 static int
3461 ena_attach(device_t pdev)
3462 {
3463         struct ena_com_dev_get_features_ctx get_feat_ctx;
3464         static int version_printed;
3465         struct ena_adapter *adapter;
3466         struct ena_com_dev *ena_dev = NULL;
3467         uint16_t tx_sgl_size = 0;
3468         uint16_t rx_sgl_size = 0;
3469         int io_queue_num;
3470         int queue_size;
3471         int rc;
3472         struct sysctl_ctx_list *ctx;
3473         struct sysctl_oid_list *children;
3474
3475         adapter = device_get_softc(pdev);
3476         adapter->pdev = pdev;
3477         ctx = device_get_sysctl_ctx(pdev);
3478         children = SYSCTL_CHILDREN(device_get_sysctl_tree(pdev));
3479
3480         mtx_init(&adapter->global_mtx, "ENA global mtx", NULL, MTX_DEF);
3481         sx_init(&adapter->ioctl_sx, "ENA ioctl sx");
3482
3483         /* Sysctl calls for Watchdog service */
3484         SYSCTL_ADD_INT(ctx, children, OID_AUTO, "wd_active",
3485             CTLFLAG_RWTUN, &adapter->wd_active, 0,
3486             "Watchdog is active");
3487
3488         SYSCTL_ADD_QUAD(ctx, children, OID_AUTO, "keep_alive_timeout",
3489             CTLFLAG_RWTUN, &adapter->keep_alive_timeout,
3490             "Timeout for Keep Alive messages");
3491
3492         SYSCTL_ADD_QUAD(ctx, children, OID_AUTO, "missing_tx_timeout",
3493             CTLFLAG_RWTUN, &adapter->missing_tx_timeout,
3494             "Timeout for TX completion");
3495
3496         SYSCTL_ADD_U32(ctx, children, OID_AUTO, "missing_tx_max_queues",
3497             CTLFLAG_RWTUN, &adapter->missing_tx_max_queues, 0,
3498             "Number of TX queues to check per run");
3499
3500         SYSCTL_ADD_U32(ctx, children, OID_AUTO, "missing_tx_threshold",
3501             CTLFLAG_RWTUN, &adapter->missing_tx_threshold, 0,
3502             "Max number of timeouted packets");
3503
3504         /* Set up the timer service */
3505         callout_init_mtx(&adapter->timer_service, &adapter->global_mtx, 0);
3506         adapter->keep_alive_timeout = DEFAULT_KEEP_ALIVE_TO;
3507         adapter->missing_tx_timeout = DEFAULT_TX_CMP_TO;
3508         adapter->missing_tx_max_queues = DEFAULT_TX_MONITORED_QUEUES;
3509         adapter->missing_tx_threshold = DEFAULT_TX_CMP_THRESHOLD;
3510
3511         if (version_printed++ == 0)
3512                 device_printf(pdev, "%s\n", ena_version);
3513
3514         rc = ena_allocate_pci_resources(adapter);
3515         if (rc) {
3516                 device_printf(pdev, "PCI resource allocation failed!\n");
3517                 ena_free_pci_resources(adapter);
3518                 goto err_pci_res;
3519         }
3520
3521         /* Allocate memory for ena_dev structure */
3522         ena_dev = ENA_MEM_ALLOC(pdev, sizeof(struct ena_com_dev));
3523         if (!ena_dev) {
3524                 device_printf(pdev, "allocating ena_dev failed\n");
3525                 rc = ENOMEM;
3526                 goto err_select_region;
3527         }
3528
3529         adapter->ena_dev = ena_dev;
3530         ena_dev->dmadev = pdev;
3531         ena_dev->bus = malloc(sizeof(struct ena_bus), M_DEVBUF,
3532             M_WAITOK | M_ZERO);
3533
3534         /* Store register resources */
3535         ((struct ena_bus*)(ena_dev->bus))->reg_bar_t =
3536             rman_get_bustag(adapter->registers);
3537         ((struct ena_bus*)(ena_dev->bus))->reg_bar_h =
3538             rman_get_bushandle(adapter->registers);
3539
3540         if (((struct ena_bus*)(ena_dev->bus))->reg_bar_h == 0) {
3541                 device_printf(pdev, "failed to pmap registers bar\n");
3542                 rc = ENXIO;
3543                 goto err_dev_free;
3544         }
3545
3546         ena_dev->tx_mem_queue_type = ENA_ADMIN_PLACEMENT_POLICY_HOST;
3547
3548         /* Device initialization */
3549         rc = ena_device_init(adapter, pdev, &get_feat_ctx, &adapter->wd_active);
3550         if (rc) {
3551                 device_printf(pdev, "ENA device init failed! (err: %d)\n", rc);
3552                 rc = ENXIO;
3553                 goto err_bus_free;
3554         }
3555
3556         adapter->keep_alive_timestamp = getsbinuptime();
3557
3558         adapter->tx_offload_cap = get_feat_ctx.offload.tx;
3559
3560         /* Set for sure that interface is not up */
3561         adapter->up = false;
3562
3563         memcpy(adapter->mac_addr, get_feat_ctx.dev_attr.mac_addr,
3564             ETHER_ADDR_LEN);
3565
3566         adapter->small_copy_len =
3567             ENA_DEFAULT_SMALL_PACKET_LEN;
3568
3569         /* calculate IO queue number to create */
3570         io_queue_num = ena_calc_io_queue_num(adapter, &get_feat_ctx);
3571
3572         ENA_ASSERT(io_queue_num > 0, "Invalid queue number: %d\n",
3573             io_queue_num);
3574         adapter->num_queues = io_queue_num;
3575
3576         /* calculatre ring sizes */
3577         queue_size = ena_calc_queue_size(adapter,&tx_sgl_size,
3578             &rx_sgl_size, &get_feat_ctx);
3579         if ((queue_size <= 0) || (io_queue_num <= 0)) {
3580                 rc = ENA_COM_FAULT;
3581                 goto err_com_free;
3582         }
3583
3584         adapter->tx_ring_size = queue_size;
3585         adapter->rx_ring_size = queue_size;
3586
3587         adapter->max_tx_sgl_size = tx_sgl_size;
3588         adapter->max_rx_sgl_size = rx_sgl_size;
3589
3590         /* set up dma tags for rx and tx buffers */
3591         rc = ena_setup_tx_dma_tag(adapter);
3592         if (rc)
3593                 goto dma_tx_err;
3594
3595         rc = ena_setup_rx_dma_tag(adapter);
3596         if (rc)
3597                 goto dma_rx_err;
3598
3599         /* initialize rings basic information */
3600         device_printf(pdev, "initalize %d io queues\n", io_queue_num);
3601         rc = ena_init_io_rings(adapter);
3602         if (rc) {
3603                 device_printf(pdev,"Error with initialization of IO rings\n");
3604                 goto err_io_init;
3605         }
3606
3607         /* setup network interface */
3608         rc = ena_setup_ifnet(pdev, adapter, &get_feat_ctx);
3609         if (rc) {
3610                 device_printf(pdev,"Error with network interface setup\n");
3611                 goto err_com_free;
3612         }
3613
3614         rc = ena_enable_msix_and_set_admin_interrupts(adapter, io_queue_num);
3615         if (rc) {
3616                 device_printf(pdev,
3617                     "Failed to enable and set the admin interrupts\n");
3618                 goto err_ifp_free;
3619         }
3620
3621         /* Initialize reset task queue */
3622         TASK_INIT(&adapter->reset_task, 0, ena_reset_task, adapter);
3623         adapter->reset_tq = taskqueue_create("ena_reset_enqueue",
3624             M_WAITOK | M_ZERO, taskqueue_thread_enqueue, &adapter->reset_tq);
3625         if (adapter->reset_tq == NULL) {
3626                 device_printf(adapter->pdev,
3627                     "Unable to create reset task queue\n");
3628                 goto err_reset_tq;
3629         }
3630         taskqueue_start_threads(&adapter->reset_tq, 1, PI_NET,
3631             "%s rstq", device_get_nameunit(adapter->pdev));
3632
3633         /* Initialize task queue responsible for updating hw stats */
3634         TASK_INIT(&adapter->stats_task, 0, ena_update_hw_stats, adapter);
3635         adapter->stats_tq = taskqueue_create_fast("ena_stats_update",
3636             M_WAITOK | M_ZERO, taskqueue_thread_enqueue, &adapter->stats_tq);
3637         if (adapter->stats_tq == NULL) {
3638                 device_printf(adapter->pdev,
3639                     "Unable to create taskqueue for updating hw stats\n");
3640                 goto err_stats_tq;
3641         }
3642         taskqueue_start_threads(&adapter->stats_tq, 1, PI_REALTIME,
3643             "%s stats tq", device_get_nameunit(adapter->pdev));
3644
3645         /* Initialize statistics */
3646         ena_alloc_counters((counter_u64_t *)&adapter->dev_stats,
3647             sizeof(struct ena_stats_dev));
3648         ena_update_stats_counters(adapter);
3649         ena_sysctl_add_nodes(adapter);
3650
3651         /* Tell the stack that the interface is not active */
3652         if_setdrvflagbits(adapter->ifp, IFF_DRV_OACTIVE, IFF_DRV_RUNNING);
3653
3654         adapter->running = true;
3655         return (0);
3656
3657 err_stats_tq:
3658         taskqueue_free(adapter->reset_tq);
3659 err_reset_tq:
3660         ena_free_mgmnt_irq(adapter);
3661         ena_disable_msix(adapter);
3662 err_ifp_free:
3663         if_detach(adapter->ifp);
3664         if_free(adapter->ifp);
3665 err_com_free:
3666         ena_free_all_io_rings_resources(adapter);
3667 err_io_init:
3668         ena_free_rx_dma_tag(adapter);
3669 dma_rx_err:
3670         ena_free_tx_dma_tag(adapter);
3671 dma_tx_err:
3672         ena_com_admin_destroy(ena_dev);
3673         ena_com_delete_host_info(ena_dev);
3674 err_bus_free:
3675         free(ena_dev->bus, M_DEVBUF);
3676 err_dev_free:
3677         free(ena_dev, M_DEVBUF);
3678 err_select_region:
3679         ena_free_pci_resources(adapter);
3680 err_pci_res:
3681         return (rc);
3682 }
3683
3684 /**
3685  * ena_detach - Device Removal Routine
3686  * @pdev: device information struct
3687  *
3688  * ena_detach is called by the device subsystem to alert the driver
3689  * that it should release a PCI device.
3690  **/
3691 static int
3692 ena_detach(device_t pdev)
3693 {
3694         struct ena_adapter *adapter = device_get_softc(pdev);
3695         struct ena_com_dev *ena_dev = adapter->ena_dev;
3696         int rc;
3697
3698         /* Make sure VLANS are not using driver */
3699         if (adapter->ifp->if_vlantrunk != NULL) {
3700                 device_printf(adapter->pdev ,"VLAN is in use, detach first\n");
3701                 return (EBUSY);
3702         }
3703
3704         /* Free reset task and callout */
3705         callout_drain(&adapter->timer_service);
3706         while (taskqueue_cancel(adapter->reset_tq, &adapter->reset_task, NULL))
3707                 taskqueue_drain(adapter->reset_tq, &adapter->reset_task);
3708         taskqueue_free(adapter->reset_tq);
3709
3710         sx_xlock(&adapter->ioctl_sx);
3711         ena_down(adapter);
3712         sx_unlock(&adapter->ioctl_sx);
3713
3714         taskqueue_free(adapter->stats_tq);
3715
3716         if (adapter->ifp != NULL) {
3717                 ether_ifdetach(adapter->ifp);
3718                 if_free(adapter->ifp);
3719         }
3720
3721         ena_free_all_io_rings_resources(adapter);
3722
3723         ena_free_counters((counter_u64_t *)&adapter->dev_stats,
3724             sizeof(struct ena_stats_dev));
3725
3726         if (adapter->rss_support)
3727                 ena_com_rss_destroy(ena_dev);
3728
3729         rc = ena_free_rx_dma_tag(adapter);
3730         if (rc)
3731                 device_printf(adapter->pdev,
3732                     "Unmapped RX DMA tag associations\n");
3733
3734         rc = ena_free_tx_dma_tag(adapter);
3735         if (rc)
3736                 device_printf(adapter->pdev,
3737                     "Unmapped TX DMA tag associations\n");
3738
3739         /* Reset the device only if the device is running. */
3740         if (adapter->running)
3741                 ena_com_dev_reset(ena_dev);
3742
3743         ena_com_delete_host_info(ena_dev);
3744
3745         ena_com_admin_destroy(ena_dev);
3746
3747         ena_free_irqs(adapter);
3748
3749         ena_com_mmio_reg_read_request_destroy(ena_dev);
3750
3751         ena_free_pci_resources(adapter);
3752
3753         mtx_destroy(&adapter->global_mtx);
3754         sx_destroy(&adapter->ioctl_sx);
3755
3756         if (ena_dev->bus != NULL)
3757                 free(ena_dev->bus, M_DEVBUF);
3758
3759         if (ena_dev != NULL)
3760                 free(ena_dev, M_DEVBUF);
3761
3762         return (bus_generic_detach(pdev));
3763 }
3764
3765 /******************************************************************************
3766  ******************************** AENQ Handlers *******************************
3767  *****************************************************************************/
3768 /**
3769  * ena_update_on_link_change:
3770  * Notify the network interface about the change in link status
3771  **/
3772 static void
3773 ena_update_on_link_change(void *adapter_data,
3774     struct ena_admin_aenq_entry *aenq_e)
3775 {
3776         struct ena_adapter *adapter = (struct ena_adapter *)adapter_data;
3777         struct ena_admin_aenq_link_change_desc *aenq_desc;
3778         int status;
3779         if_t ifp;
3780
3781         aenq_desc = (struct ena_admin_aenq_link_change_desc *)aenq_e;
3782         ifp = adapter->ifp;
3783         status = aenq_desc->flags &
3784             ENA_ADMIN_AENQ_LINK_CHANGE_DESC_LINK_STATUS_MASK;
3785
3786         if (status != 0) {
3787                 device_printf(adapter->pdev, "link is UP\n");
3788                 if_link_state_change(ifp, LINK_STATE_UP);
3789         } else if (status == 0) {
3790                 device_printf(adapter->pdev, "link is DOWN\n");
3791                 if_link_state_change(ifp, LINK_STATE_DOWN);
3792         } else {
3793                 device_printf(adapter->pdev, "invalid value recvd\n");
3794                 BUG();
3795         }
3796
3797         adapter->link_status = status;
3798
3799         return;
3800 }
3801
3802 /**
3803  * This handler will called for unknown event group or unimplemented handlers
3804  **/
3805 static void
3806 unimplemented_aenq_handler(void *data,
3807     struct ena_admin_aenq_entry *aenq_e)
3808 {
3809         return;
3810 }
3811
3812 static struct ena_aenq_handlers aenq_handlers = {
3813     .handlers = {
3814             [ENA_ADMIN_LINK_CHANGE] = ena_update_on_link_change,
3815             [ENA_ADMIN_KEEP_ALIVE] = ena_keep_alive_wd,
3816     },
3817     .unimplemented_handler = unimplemented_aenq_handler
3818 };
3819
3820 /*********************************************************************
3821  *  FreeBSD Device Interface Entry Points
3822  *********************************************************************/
3823
3824 static device_method_t ena_methods[] = {
3825     /* Device interface */
3826     DEVMETHOD(device_probe, ena_probe),
3827     DEVMETHOD(device_attach, ena_attach),
3828     DEVMETHOD(device_detach, ena_detach),
3829     DEVMETHOD_END
3830 };
3831
3832 static driver_t ena_driver = {
3833     "ena", ena_methods, sizeof(struct ena_adapter),
3834 };
3835
3836 devclass_t ena_devclass;
3837 DRIVER_MODULE(ena, pci, ena_driver, ena_devclass, 0, 0);
3838 MODULE_DEPEND(ena, pci, 1, 1, 1);
3839 MODULE_DEPEND(ena, ether, 1, 1, 1);
3840
3841 /*********************************************************************/