sys/dev/sfxge/sfxge.c

   1 /*-
   2  * Copyright (c) 2010-2011 Solarflare Communications, Inc.
   3  * All rights reserved.
   4  *
   5  * This software was developed in part by Philip Paeps under contract for
   6  * Solarflare Communications, Inc.
   7  *
   8  * Redistribution and use in source and binary forms, with or without
   9  * modification, are permitted provided that the following conditions
  10  * are met:
  11  * 1. Redistributions of source code must retain the above copyright
  12  *    notice, this list of conditions and the following disclaimer.
  13  * 2. Redistributions in binary form must reproduce the above copyright
  14  *    notice, this list of conditions and the following disclaimer in the
  15  *    documentation and/or other materials provided with the distribution.
  16  *
  17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
  18  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  19  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  20  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
  21  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  22  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  23  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  24  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  25  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  26  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  27  * SUCH DAMAGE.
  28  */
  29
  30 #include <sys/cdefs.h>
  31 __FBSDID("$FreeBSD$");
  32
  33 #include <sys/param.h>
  34 #include <sys/kernel.h>
  35 #include <sys/bus.h>
  36 #include <sys/rman.h>
  37 #include <sys/lock.h>
  38 #include <sys/module.h>
  39 #include <sys/mutex.h>
  40 #include <sys/smp.h>
  41 #include <sys/socket.h>
  42 #include <sys/taskqueue.h>
  43 #include <sys/sockio.h>
  44 #include <sys/sysctl.h>
  45 #include <sys/syslog.h>
  46
  47 #include <dev/pci/pcireg.h>
  48 #include <dev/pci/pcivar.h>
  49
  50 #include <net/ethernet.h>
  51 #include <net/if.h>
  52 #include <net/if_media.h>
  53 #include <net/if_types.h>
  54
  55 #include "common/efx.h"
  56
  57 #include "sfxge.h"
  58 #include "sfxge_rx.h"
  59
  60 #define SFXGE_CAP (IFCAP_VLAN_MTU | \
  61                    IFCAP_HWCSUM | IFCAP_VLAN_HWCSUM | IFCAP_TSO |       \
  62                    IFCAP_JUMBO_MTU | IFCAP_LRO |                        \
  63                    IFCAP_VLAN_HWTSO | IFCAP_LINKSTATE)
  64 #define SFXGE_CAP_ENABLE SFXGE_CAP
  65 #define SFXGE_CAP_FIXED (IFCAP_VLAN_MTU | IFCAP_HWCSUM | IFCAP_VLAN_HWCSUM | \
  66                          IFCAP_JUMBO_MTU | IFCAP_LINKSTATE)
  67
  68 MALLOC_DEFINE(M_SFXGE, "sfxge", "Solarflare 10GigE driver");
  69
  70
  71 SYSCTL_NODE(_hw, OID_AUTO, sfxge, CTLFLAG_RD, 0,
  72             "SFXGE driver parameters");
  73
  74 #define SFXGE_PARAM_RX_RING     SFXGE_PARAM(rx_ring)
  75 static int sfxge_rx_ring_entries = SFXGE_NDESCS;
  76 TUNABLE_INT(SFXGE_PARAM_RX_RING, &sfxge_rx_ring_entries);
  77 SYSCTL_INT(_hw_sfxge, OID_AUTO, rx_ring, CTLFLAG_RDTUN,
  78            &sfxge_rx_ring_entries, 0,
  79            "Maximum number of descriptors in a receive ring");
  80
  81 #define SFXGE_PARAM_TX_RING     SFXGE_PARAM(tx_ring)
  82 static int sfxge_tx_ring_entries = SFXGE_NDESCS;
  83 TUNABLE_INT(SFXGE_PARAM_TX_RING, &sfxge_tx_ring_entries);
  84 SYSCTL_INT(_hw_sfxge, OID_AUTO, tx_ring, CTLFLAG_RDTUN,
  85            &sfxge_tx_ring_entries, 0,
  86            "Maximum number of descriptors in a transmit ring");
  87
  88
  89 static void
  90 sfxge_reset(void *arg, int npending);
  91
  92 static int
  93 sfxge_start(struct sfxge_softc *sc)
  94 {
  95         int rc;
  96
  97         SFXGE_ADAPTER_LOCK_ASSERT_OWNED(sc);
  98
  99         if (sc->init_state == SFXGE_STARTED)
 100                 return (0);
 101
 102         if (sc->init_state != SFXGE_REGISTERED) {
 103                 rc = EINVAL;
 104                 goto fail;
 105         }
 106
 107         if ((rc = efx_nic_init(sc->enp)) != 0)
 108                 goto fail;
 109
 110         /* Start processing interrupts. */
 111         if ((rc = sfxge_intr_start(sc)) != 0)
 112                 goto fail2;
 113
 114         /* Start processing events. */
 115         if ((rc = sfxge_ev_start(sc)) != 0)
 116                 goto fail3;
 117
 118         /* Start the receiver side. */
 119         if ((rc = sfxge_rx_start(sc)) != 0)
 120                 goto fail4;
 121
 122         /* Start the transmitter side. */
 123         if ((rc = sfxge_tx_start(sc)) != 0)
 124                 goto fail5;
 125
 126         /* Fire up the port. */
 127         if ((rc = sfxge_port_start(sc)) != 0)
 128                 goto fail6;
 129
 130         sc->init_state = SFXGE_STARTED;
 131
 132         /* Tell the stack we're running. */
 133         sc->ifnet->if_drv_flags |= IFF_DRV_RUNNING;
 134         sc->ifnet->if_drv_flags &= ~IFF_DRV_OACTIVE;
 135
 136         return (0);
 137
 138 fail6:
 139         sfxge_tx_stop(sc);
 140
 141 fail5:
 142         sfxge_rx_stop(sc);
 143
 144 fail4:
 145         sfxge_ev_stop(sc);
 146
 147 fail3:
 148         sfxge_intr_stop(sc);
 149
 150 fail2:
 151         efx_nic_fini(sc->enp);
 152
 153 fail:
 154         device_printf(sc->dev, "sfxge_start: %d\n", rc);
 155
 156         return (rc);
 157 }
 158
 159 static void
 160 sfxge_if_init(void *arg)
 161 {
 162         struct sfxge_softc *sc;
 163
 164         sc = (struct sfxge_softc *)arg;
 165
 166         SFXGE_ADAPTER_LOCK(sc);
 167         (void)sfxge_start(sc);
 168         SFXGE_ADAPTER_UNLOCK(sc);
 169 }
 170
 171 static void
 172 sfxge_stop(struct sfxge_softc *sc)
 173 {
 174         SFXGE_ADAPTER_LOCK_ASSERT_OWNED(sc);
 175
 176         if (sc->init_state != SFXGE_STARTED)
 177                 return;
 178
 179         sc->init_state = SFXGE_REGISTERED;
 180
 181         /* Stop the port. */
 182         sfxge_port_stop(sc);
 183
 184         /* Stop the transmitter. */
 185         sfxge_tx_stop(sc);
 186
 187         /* Stop the receiver. */
 188         sfxge_rx_stop(sc);
 189
 190         /* Stop processing events. */
 191         sfxge_ev_stop(sc);
 192
 193         /* Stop processing interrupts. */
 194         sfxge_intr_stop(sc);
 195
 196         efx_nic_fini(sc->enp);
 197
 198         sc->ifnet->if_drv_flags &= ~IFF_DRV_RUNNING;
 199 }
 200
 201 static int
 202 sfxge_if_ioctl(struct ifnet *ifp, unsigned long command, caddr_t data)
 203 {
 204         struct sfxge_softc *sc;
 205         struct ifreq *ifr;
 206         int error;
 207
 208         ifr = (struct ifreq *)data;
 209         sc = ifp->if_softc;
 210         error = 0;
 211
 212         switch (command) {
 213         case SIOCSIFFLAGS:
 214                 SFXGE_ADAPTER_LOCK(sc);
 215                 if (ifp->if_flags & IFF_UP) {
 216                         if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
 217                                 if ((ifp->if_flags ^ sc->if_flags) &
 218                                     (IFF_PROMISC | IFF_ALLMULTI)) {
 219                                         sfxge_mac_filter_set(sc);
 220                                 }
 221                         } else
 222                                 sfxge_start(sc);
 223                 } else
 224                         if (ifp->if_drv_flags & IFF_DRV_RUNNING)
 225                                 sfxge_stop(sc);
 226                 sc->if_flags = ifp->if_flags;
 227                 SFXGE_ADAPTER_UNLOCK(sc);
 228                 break;
 229         case SIOCSIFMTU:
 230                 if (ifr->ifr_mtu == ifp->if_mtu) {
 231                         /* Nothing to do */
 232                         error = 0;
 233                 } else if (ifr->ifr_mtu > SFXGE_MAX_MTU) {
 234                         error = EINVAL;
 235                 } else if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
 236                         ifp->if_mtu = ifr->ifr_mtu;
 237                         error = 0;
 238                 } else {
 239                         /* Restart required */
 240                         SFXGE_ADAPTER_LOCK(sc);
 241                         sfxge_stop(sc);
 242                         ifp->if_mtu = ifr->ifr_mtu;
 243                         error = sfxge_start(sc);
 244                         SFXGE_ADAPTER_UNLOCK(sc);
 245                         if (error != 0) {
 246                                 ifp->if_flags &= ~IFF_UP;
 247                                 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
 248                                 if_down(ifp);
 249                         }
 250                 }
 251                 break;
 252         case SIOCADDMULTI:
 253         case SIOCDELMULTI:
 254                 if (ifp->if_drv_flags & IFF_DRV_RUNNING)
 255                         sfxge_mac_filter_set(sc);
 256                 break;
 257         case SIOCSIFCAP:
 258                 SFXGE_ADAPTER_LOCK(sc);
 259
 260                 /*
 261                  * The networking core already rejects attempts to
 262                  * enable capabilities we don't have.  We still have
 263                  * to reject attempts to disable capabilities that we
 264                  * can't (yet) disable.
 265                  */
 266                 if (~ifr->ifr_reqcap & SFXGE_CAP_FIXED) {
 267                         error = EINVAL;
 268                         SFXGE_ADAPTER_UNLOCK(sc);
 269                         break;
 270                 }
 271
 272                 ifp->if_capenable = ifr->ifr_reqcap;
 273                 if (ifp->if_capenable & IFCAP_TXCSUM)
 274                         ifp->if_hwassist |= (CSUM_IP | CSUM_TCP | CSUM_UDP);
 275                 else
 276                         ifp->if_hwassist &= ~(CSUM_IP | CSUM_TCP | CSUM_UDP);
 277                 if (ifp->if_capenable & IFCAP_TSO)
 278                         ifp->if_hwassist |= CSUM_TSO;
 279                 else
 280                         ifp->if_hwassist &= ~CSUM_TSO;
 281
 282                 SFXGE_ADAPTER_UNLOCK(sc);
 283                 break;
 284         case SIOCSIFMEDIA:
 285         case SIOCGIFMEDIA:
 286                 error = ifmedia_ioctl(ifp, ifr, &sc->media, command);
 287                 break;
 288         default:
 289                 error = ether_ioctl(ifp, command, data);
 290         }
 291
 292         return (error);
 293 }
 294
 295 static void
 296 sfxge_ifnet_fini(struct ifnet *ifp)
 297 {
 298         struct sfxge_softc *sc = ifp->if_softc;
 299
 300         SFXGE_ADAPTER_LOCK(sc);
 301         sfxge_stop(sc);
 302         SFXGE_ADAPTER_UNLOCK(sc);
 303
 304         ifmedia_removeall(&sc->media);
 305         ether_ifdetach(ifp);
 306         if_free(ifp);
 307 }
 308
 309 static int
 310 sfxge_ifnet_init(struct ifnet *ifp, struct sfxge_softc *sc)
 311 {
 312         const efx_nic_cfg_t *encp = efx_nic_cfg_get(sc->enp);
 313         device_t dev;
 314         int rc;
 315
 316         dev = sc->dev;
 317         sc->ifnet = ifp;
 318
 319         if_initname(ifp, device_get_name(dev), device_get_unit(dev));
 320         ifp->if_init = sfxge_if_init;
 321         ifp->if_softc = sc;
 322         ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
 323         ifp->if_ioctl = sfxge_if_ioctl;
 324
 325         ifp->if_capabilities = SFXGE_CAP;
 326         ifp->if_capenable = SFXGE_CAP_ENABLE;
 327         ifp->if_hwassist = CSUM_TCP | CSUM_UDP | CSUM_IP | CSUM_TSO;
 328
 329         ether_ifattach(ifp, encp->enc_mac_addr);
 330
 331 #ifdef SFXGE_HAVE_MQ
 332         ifp->if_transmit = sfxge_if_transmit;
 333         ifp->if_qflush = sfxge_if_qflush;
 334 #else
 335         ifp->if_start = sfxge_if_start;
 336         IFQ_SET_MAXLEN(&ifp->if_snd, sc->txq_entries - 1);
 337         ifp->if_snd.ifq_drv_maxlen = sc->txq_entries - 1;
 338         IFQ_SET_READY(&ifp->if_snd);
 339
 340         snprintf(sc->tx_lock_name, sizeof(sc->tx_lock_name),
 341                  "%s:tx", device_get_nameunit(sc->dev));
 342         mtx_init(&sc->tx_lock, sc->tx_lock_name, NULL, MTX_DEF);
 343 #endif
 344
 345         if ((rc = sfxge_port_ifmedia_init(sc)) != 0)
 346                 goto fail;
 347
 348         return (0);
 349
 350 fail:
 351         ether_ifdetach(sc->ifnet);
 352         return (rc);
 353 }
 354
 355 void
 356 sfxge_sram_buf_tbl_alloc(struct sfxge_softc *sc, size_t n, uint32_t *idp)
 357 {
 358         KASSERT(sc->buffer_table_next + n <=
 359                 efx_nic_cfg_get(sc->enp)->enc_buftbl_limit,
 360                 ("buffer table full"));
 361
 362         *idp = sc->buffer_table_next;
 363         sc->buffer_table_next += n;
 364 }
 365
 366 static int
 367 sfxge_bar_init(struct sfxge_softc *sc)
 368 {
 369         efsys_bar_t *esbp = &sc->bar;
 370
 371         esbp->esb_rid = PCIR_BAR(EFX_MEM_BAR);
 372         if ((esbp->esb_res = bus_alloc_resource_any(sc->dev, SYS_RES_MEMORY,
 373             &esbp->esb_rid, RF_ACTIVE)) == NULL) {
 374                 device_printf(sc->dev, "Cannot allocate BAR region %d\n",
 375                     EFX_MEM_BAR);
 376                 return (ENXIO);
 377         }
 378         esbp->esb_tag = rman_get_bustag(esbp->esb_res);
 379         esbp->esb_handle = rman_get_bushandle(esbp->esb_res);
 380
 381         SFXGE_BAR_LOCK_INIT(esbp, device_get_nameunit(sc->dev));
 382
 383         return (0);
 384 }
 385
 386 static void
 387 sfxge_bar_fini(struct sfxge_softc *sc)
 388 {
 389         efsys_bar_t *esbp = &sc->bar;
 390
 391         bus_release_resource(sc->dev, SYS_RES_MEMORY, esbp->esb_rid,
 392             esbp->esb_res);
 393         SFXGE_BAR_LOCK_DESTROY(esbp);
 394 }
 395
 396 static int
 397 sfxge_create(struct sfxge_softc *sc)
 398 {
 399         device_t dev;
 400         efx_nic_t *enp;
 401         int error;
 402         char rss_param_name[sizeof(SFXGE_PARAM(%d.max_rss_channels))];
 403
 404         dev = sc->dev;
 405
 406         SFXGE_ADAPTER_LOCK_INIT(sc, device_get_nameunit(sc->dev));
 407
 408         sc->max_rss_channels = 0;
 409         snprintf(rss_param_name, sizeof(rss_param_name),
 410                  SFXGE_PARAM(%d.max_rss_channels),
 411                  (int)device_get_unit(dev));
 412         TUNABLE_INT_FETCH(rss_param_name, &sc->max_rss_channels);
 413
 414         sc->stats_node = SYSCTL_ADD_NODE(
 415                 device_get_sysctl_ctx(dev),
 416                 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
 417                 OID_AUTO, "stats", CTLFLAG_RD, NULL, "Statistics");
 418         if (sc->stats_node == NULL) {
 419                 error = ENOMEM;
 420                 goto fail;
 421         }
 422
 423         TASK_INIT(&sc->task_reset, 0, sfxge_reset, sc);
 424
 425         (void) pci_enable_busmaster(dev);
 426
 427         /* Initialize DMA mappings. */
 428         if ((error = sfxge_dma_init(sc)) != 0)
 429                 goto fail;
 430
 431         /* Map the device registers. */
 432         if ((error = sfxge_bar_init(sc)) != 0)
 433                 goto fail;
 434
 435         error = efx_family(pci_get_vendor(dev), pci_get_device(dev),
 436             &sc->family);
 437         KASSERT(error == 0, ("Family should be filtered by sfxge_probe()"));
 438
 439         /* Create the common code nic object. */
 440         SFXGE_EFSYS_LOCK_INIT(&sc->enp_lock,
 441                               device_get_nameunit(sc->dev), "nic");
 442         if ((error = efx_nic_create(sc->family, (efsys_identifier_t *)sc,
 443             &sc->bar, &sc->enp_lock, &enp)) != 0)
 444                 goto fail3;
 445         sc->enp = enp;
 446
 447         if (!ISP2(sfxge_rx_ring_entries) ||
 448             !(sfxge_rx_ring_entries & EFX_RXQ_NDESCS_MASK)) {
 449                 log(LOG_ERR, "%s=%d must be power of 2 from %u to %u",
 450                     SFXGE_PARAM_RX_RING, sfxge_rx_ring_entries,
 451                     EFX_RXQ_MINNDESCS, EFX_RXQ_MAXNDESCS);
 452                 error = EINVAL;
 453                 goto fail_rx_ring_entries;
 454         }
 455         sc->rxq_entries = sfxge_rx_ring_entries;
 456
 457         if (!ISP2(sfxge_tx_ring_entries) ||
 458             !(sfxge_tx_ring_entries & EFX_TXQ_NDESCS_MASK)) {
 459                 log(LOG_ERR, "%s=%d must be power of 2 from %u to %u",
 460                     SFXGE_PARAM_TX_RING, sfxge_tx_ring_entries,
 461                     EFX_TXQ_MINNDESCS, EFX_TXQ_MAXNDESCS);
 462                 error = EINVAL;
 463                 goto fail_tx_ring_entries;
 464         }
 465         sc->txq_entries = sfxge_tx_ring_entries;
 466
 467         /* Initialize MCDI to talk to the microcontroller. */
 468         if ((error = sfxge_mcdi_init(sc)) != 0)
 469                 goto fail4;
 470
 471         /* Probe the NIC and build the configuration data area. */
 472         if ((error = efx_nic_probe(enp)) != 0)
 473                 goto fail5;
 474
 475         /* Initialize the NVRAM. */
 476         if ((error = efx_nvram_init(enp)) != 0)
 477                 goto fail6;
 478
 479         /* Initialize the VPD. */
 480         if ((error = efx_vpd_init(enp)) != 0)
 481                 goto fail7;
 482
 483         /* Reset the NIC. */
 484         if ((error = efx_nic_reset(enp)) != 0)
 485                 goto fail8;
 486
 487         /* Initialize buffer table allocation. */
 488         sc->buffer_table_next = 0;
 489
 490         /* Set up interrupts. */
 491         if ((error = sfxge_intr_init(sc)) != 0)
 492                 goto fail8;
 493
 494         /* Initialize event processing state. */
 495         if ((error = sfxge_ev_init(sc)) != 0)
 496                 goto fail11;
 497
 498         /* Initialize receive state. */
 499         if ((error = sfxge_rx_init(sc)) != 0)
 500                 goto fail12;
 501
 502         /* Initialize transmit state. */
 503         if ((error = sfxge_tx_init(sc)) != 0)
 504                 goto fail13;
 505
 506         /* Initialize port state. */
 507         if ((error = sfxge_port_init(sc)) != 0)
 508                 goto fail14;
 509
 510         sc->init_state = SFXGE_INITIALIZED;
 511
 512         return (0);
 513
 514 fail14:
 515         sfxge_tx_fini(sc);
 516
 517 fail13:
 518         sfxge_rx_fini(sc);
 519
 520 fail12:
 521         sfxge_ev_fini(sc);
 522
 523 fail11:
 524         sfxge_intr_fini(sc);
 525
 526 fail8:
 527         efx_vpd_fini(enp);
 528
 529 fail7:
 530         efx_nvram_fini(enp);
 531
 532 fail6:
 533         efx_nic_unprobe(enp);
 534
 535 fail5:
 536         sfxge_mcdi_fini(sc);
 537
 538 fail4:
 539 fail_tx_ring_entries:
 540 fail_rx_ring_entries:
 541         sc->enp = NULL;
 542         efx_nic_destroy(enp);
 543         SFXGE_EFSYS_LOCK_DESTROY(&sc->enp_lock);
 544
 545 fail3:
 546         sfxge_bar_fini(sc);
 547         (void) pci_disable_busmaster(sc->dev);
 548
 549 fail:
 550         sc->dev = NULL;
 551         SFXGE_ADAPTER_LOCK_DESTROY(sc);
 552         return (error);
 553 }
 554
 555 static void
 556 sfxge_destroy(struct sfxge_softc *sc)
 557 {
 558         efx_nic_t *enp;
 559
 560         /* Clean up port state. */
 561         sfxge_port_fini(sc);
 562
 563         /* Clean up transmit state. */
 564         sfxge_tx_fini(sc);
 565
 566         /* Clean up receive state. */
 567         sfxge_rx_fini(sc);
 568
 569         /* Clean up event processing state. */
 570         sfxge_ev_fini(sc);
 571
 572         /* Clean up interrupts. */
 573         sfxge_intr_fini(sc);
 574
 575         /* Tear down common code subsystems. */
 576         efx_nic_reset(sc->enp);
 577         efx_vpd_fini(sc->enp);
 578         efx_nvram_fini(sc->enp);
 579         efx_nic_unprobe(sc->enp);
 580
 581         /* Tear down MCDI. */
 582         sfxge_mcdi_fini(sc);
 583
 584         /* Destroy common code context. */
 585         enp = sc->enp;
 586         sc->enp = NULL;
 587         efx_nic_destroy(enp);
 588
 589         /* Free DMA memory. */
 590         sfxge_dma_fini(sc);
 591
 592         /* Free mapped BARs. */
 593         sfxge_bar_fini(sc);
 594
 595         (void) pci_disable_busmaster(sc->dev);
 596
 597         taskqueue_drain(taskqueue_thread, &sc->task_reset);
 598
 599         /* Destroy the softc lock. */
 600         SFXGE_ADAPTER_LOCK_DESTROY(sc);
 601 }
 602
 603 static int
 604 sfxge_vpd_handler(SYSCTL_HANDLER_ARGS)
 605 {
 606         struct sfxge_softc *sc = arg1;
 607         efx_vpd_value_t value;
 608         int rc;
 609
 610         value.evv_tag = arg2 >> 16;
 611         value.evv_keyword = arg2 & 0xffff;
 612         if ((rc = efx_vpd_get(sc->enp, sc->vpd_data, sc->vpd_size, &value))
 613             != 0)
 614                 return (rc);
 615
 616         return (SYSCTL_OUT(req, value.evv_value, value.evv_length));
 617 }
 618
 619 static void
 620 sfxge_vpd_try_add(struct sfxge_softc *sc, struct sysctl_oid_list *list,
 621                   efx_vpd_tag_t tag, const char *keyword)
 622 {
 623         struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(sc->dev);
 624         efx_vpd_value_t value;
 625
 626         /* Check whether VPD tag/keyword is present */
 627         value.evv_tag = tag;
 628         value.evv_keyword = EFX_VPD_KEYWORD(keyword[0], keyword[1]);
 629         if (efx_vpd_get(sc->enp, sc->vpd_data, sc->vpd_size, &value) != 0)
 630                 return;
 631
 632         SYSCTL_ADD_PROC(
 633                 ctx, list, OID_AUTO, keyword, CTLTYPE_STRING|CTLFLAG_RD,
 634                 sc, tag << 16 | EFX_VPD_KEYWORD(keyword[0], keyword[1]),
 635                 sfxge_vpd_handler, "A", "");
 636 }
 637
 638 static int
 639 sfxge_vpd_init(struct sfxge_softc *sc)
 640 {
 641         struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(sc->dev);
 642         struct sysctl_oid *vpd_node;
 643         struct sysctl_oid_list *vpd_list;
 644         char keyword[3];
 645         efx_vpd_value_t value;
 646         int rc;
 647
 648         if ((rc = efx_vpd_size(sc->enp, &sc->vpd_size)) != 0)
 649                 goto fail;
 650         sc->vpd_data = malloc(sc->vpd_size, M_SFXGE, M_WAITOK);
 651         if ((rc = efx_vpd_read(sc->enp, sc->vpd_data, sc->vpd_size)) != 0)
 652                 goto fail2;
 653
 654         /* Copy ID (product name) into device description, and log it. */
 655         value.evv_tag = EFX_VPD_ID;
 656         if (efx_vpd_get(sc->enp, sc->vpd_data, sc->vpd_size, &value) == 0) {
 657                 value.evv_value[value.evv_length] = 0;
 658                 device_set_desc_copy(sc->dev, value.evv_value);
 659                 device_printf(sc->dev, "%s\n", value.evv_value);
 660         }
 661
 662         vpd_node = SYSCTL_ADD_NODE(
 663                 ctx, SYSCTL_CHILDREN(device_get_sysctl_tree(sc->dev)),
 664                 OID_AUTO, "vpd", CTLFLAG_RD, NULL, "Vital Product Data");
 665         vpd_list = SYSCTL_CHILDREN(vpd_node);
 666
 667         /* Add sysctls for all expected and any vendor-defined keywords. */
 668         sfxge_vpd_try_add(sc, vpd_list, EFX_VPD_RO, "PN");
 669         sfxge_vpd_try_add(sc, vpd_list, EFX_VPD_RO, "EC");
 670         sfxge_vpd_try_add(sc, vpd_list, EFX_VPD_RO, "SN");
 671         keyword[0] = 'V';
 672         keyword[2] = 0;
 673         for (keyword[1] = '0'; keyword[1] <= '9'; keyword[1]++)
 674                 sfxge_vpd_try_add(sc, vpd_list, EFX_VPD_RO, keyword);
 675         for (keyword[1] = 'A'; keyword[1] <= 'Z'; keyword[1]++)
 676                 sfxge_vpd_try_add(sc, vpd_list, EFX_VPD_RO, keyword);
 677
 678         return (0);
 679
 680 fail2:
 681         free(sc->vpd_data, M_SFXGE);
 682 fail:
 683         return (rc);
 684 }
 685
 686 static void
 687 sfxge_vpd_fini(struct sfxge_softc *sc)
 688 {
 689         free(sc->vpd_data, M_SFXGE);
 690 }
 691
 692 static void
 693 sfxge_reset(void *arg, int npending)
 694 {
 695         struct sfxge_softc *sc;
 696         int rc;
 697
 698         (void)npending;
 699
 700         sc = (struct sfxge_softc *)arg;
 701
 702         SFXGE_ADAPTER_LOCK(sc);
 703
 704         if (sc->init_state != SFXGE_STARTED)
 705                 goto done;
 706
 707         sfxge_stop(sc);
 708         efx_nic_reset(sc->enp);
 709         if ((rc = sfxge_start(sc)) != 0)
 710                 device_printf(sc->dev,
 711                               "reset failed (%d); interface is now stopped\n",
 712                               rc);
 713
 714 done:
 715         SFXGE_ADAPTER_UNLOCK(sc);
 716 }
 717
 718 void
 719 sfxge_schedule_reset(struct sfxge_softc *sc)
 720 {
 721         taskqueue_enqueue(taskqueue_thread, &sc->task_reset);
 722 }
 723
 724 static int
 725 sfxge_attach(device_t dev)
 726 {
 727         struct sfxge_softc *sc;
 728         struct ifnet *ifp;
 729         int error;
 730
 731         sc = device_get_softc(dev);
 732         sc->dev = dev;
 733
 734         /* Allocate ifnet. */
 735         ifp = if_alloc(IFT_ETHER);
 736         if (ifp == NULL) {
 737                 device_printf(dev, "Couldn't allocate ifnet\n");
 738                 error = ENOMEM;
 739                 goto fail;
 740         }
 741         sc->ifnet = ifp;
 742
 743         /* Initialize hardware. */
 744         if ((error = sfxge_create(sc)) != 0)
 745                 goto fail2;
 746
 747         /* Create the ifnet for the port. */
 748         if ((error = sfxge_ifnet_init(ifp, sc)) != 0)
 749                 goto fail3;
 750
 751         if ((error = sfxge_vpd_init(sc)) != 0)
 752                 goto fail4;
 753
 754         sc->init_state = SFXGE_REGISTERED;
 755
 756         return (0);
 757
 758 fail4:
 759         sfxge_ifnet_fini(ifp);
 760 fail3:
 761         sfxge_destroy(sc);
 762
 763 fail2:
 764         if_free(sc->ifnet);
 765
 766 fail:
 767         return (error);
 768 }
 769
 770 static int
 771 sfxge_detach(device_t dev)
 772 {
 773         struct sfxge_softc *sc;
 774
 775         sc = device_get_softc(dev);
 776
 777         sfxge_vpd_fini(sc);
 778
 779         /* Destroy the ifnet. */
 780         sfxge_ifnet_fini(sc->ifnet);
 781
 782         /* Tear down hardware. */
 783         sfxge_destroy(sc);
 784
 785         return (0);
 786 }
 787
 788 static int
 789 sfxge_probe(device_t dev)
 790 {
 791         uint16_t pci_vendor_id;
 792         uint16_t pci_device_id;
 793         efx_family_t family;
 794         int rc;
 795
 796         pci_vendor_id = pci_get_vendor(dev);
 797         pci_device_id = pci_get_device(dev);
 798
 799         rc = efx_family(pci_vendor_id, pci_device_id, &family);
 800         if (rc != 0)
 801                 return (ENXIO);
 802
 803         KASSERT(family == EFX_FAMILY_SIENA, ("impossible controller family"));
 804         device_set_desc(dev, "Solarflare SFC9000 family");
 805         return (0);
 806 }
 807
 808 static device_method_t sfxge_methods[] = {
 809         DEVMETHOD(device_probe,         sfxge_probe),
 810         DEVMETHOD(device_attach,        sfxge_attach),
 811         DEVMETHOD(device_detach,        sfxge_detach),
 812
 813         DEVMETHOD_END
 814 };
 815
 816 static devclass_t sfxge_devclass;
 817
 818 static driver_t sfxge_driver = {
 819         "sfxge",
 820         sfxge_methods,
 821         sizeof(struct sfxge_softc)
 822 };
 823
 824 DRIVER_MODULE(sfxge, pci, sfxge_driver, sfxge_devclass, 0, 0);