The Design and Implementation of the FreeBSD Operating System, Second Edition
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FreeBSD/Linux Kernel Cross Reference
sys/dev/sfxge/sfxge.c

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    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: releng/9.2/sys/dev/sfxge/sfxge.c 229093 2011-12-31 14:12:12Z hselasky $");
   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 
   46 #include <dev/pci/pcireg.h>
   47 #include <dev/pci/pcivar.h>
   48 
   49 #include <net/ethernet.h>
   50 #include <net/if.h>
   51 #include <net/if_media.h>
   52 #include <net/if_types.h>
   53 
   54 #include "common/efx.h"
   55 
   56 #include "sfxge.h"
   57 #include "sfxge_rx.h"
   58 
   59 #define SFXGE_CAP (IFCAP_VLAN_MTU | \
   60                    IFCAP_HWCSUM | IFCAP_VLAN_HWCSUM | IFCAP_TSO |       \
   61                    IFCAP_JUMBO_MTU | IFCAP_LRO |                        \
   62                    IFCAP_VLAN_HWTSO | IFCAP_LINKSTATE)
   63 #define SFXGE_CAP_ENABLE SFXGE_CAP
   64 #define SFXGE_CAP_FIXED (IFCAP_VLAN_MTU | IFCAP_HWCSUM | IFCAP_VLAN_HWCSUM | \
   65                          IFCAP_JUMBO_MTU | IFCAP_LINKSTATE)
   66 
   67 MALLOC_DEFINE(M_SFXGE, "sfxge", "Solarflare 10GigE driver");
   68 
   69 static void
   70 sfxge_reset(void *arg, int npending);
   71 
   72 static int
   73 sfxge_start(struct sfxge_softc *sc)
   74 {
   75         int rc;
   76 
   77         sx_assert(&sc->softc_lock, LA_XLOCKED);
   78 
   79         if (sc->init_state == SFXGE_STARTED)
   80                 return 0;
   81 
   82         if (sc->init_state != SFXGE_REGISTERED) {
   83                 rc = EINVAL;
   84                 goto fail;
   85         }
   86 
   87         if ((rc = efx_nic_init(sc->enp)) != 0)
   88                 goto fail;
   89 
   90         /* Start processing interrupts. */
   91         if ((rc = sfxge_intr_start(sc)) != 0)
   92                 goto fail2;
   93 
   94         /* Start processing events. */
   95         if ((rc = sfxge_ev_start(sc)) != 0)
   96                 goto fail3;
   97 
   98         /* Start the receiver side. */
   99         if ((rc = sfxge_rx_start(sc)) != 0)
  100                 goto fail4;
  101 
  102         /* Start the transmitter side. */
  103         if ((rc = sfxge_tx_start(sc)) != 0)
  104                 goto fail5;
  105 
  106         /* Fire up the port. */
  107         if ((rc = sfxge_port_start(sc)) != 0)
  108                 goto fail6;
  109 
  110         sc->init_state = SFXGE_STARTED;
  111 
  112         /* Tell the stack we're running. */
  113         sc->ifnet->if_drv_flags |= IFF_DRV_RUNNING;
  114         sc->ifnet->if_drv_flags &= ~IFF_DRV_OACTIVE;
  115 
  116         return (0);
  117 
  118 fail6:
  119         sfxge_tx_stop(sc);
  120 
  121 fail5:
  122         sfxge_rx_stop(sc);
  123 
  124 fail4:
  125         sfxge_ev_stop(sc);
  126 
  127 fail3:
  128         sfxge_intr_stop(sc);
  129 
  130 fail2:
  131         efx_nic_fini(sc->enp);
  132 
  133 fail:
  134         device_printf(sc->dev, "sfxge_start: %d\n", rc);
  135 
  136         return (rc);
  137 }
  138 
  139 static void
  140 sfxge_if_init(void *arg)
  141 {
  142         struct sfxge_softc *sc;
  143 
  144         sc = (struct sfxge_softc *)arg;
  145 
  146         sx_xlock(&sc->softc_lock);
  147         (void)sfxge_start(sc);
  148         sx_xunlock(&sc->softc_lock);
  149 }
  150 
  151 static void
  152 sfxge_stop(struct sfxge_softc *sc)
  153 {
  154         sx_assert(&sc->softc_lock, LA_XLOCKED);
  155 
  156         if (sc->init_state != SFXGE_STARTED)
  157                 return;
  158 
  159         sc->init_state = SFXGE_REGISTERED;
  160 
  161         /* Stop the port. */
  162         sfxge_port_stop(sc);
  163 
  164         /* Stop the transmitter. */
  165         sfxge_tx_stop(sc);
  166 
  167         /* Stop the receiver. */
  168         sfxge_rx_stop(sc);
  169 
  170         /* Stop processing events. */
  171         sfxge_ev_stop(sc);
  172 
  173         /* Stop processing interrupts. */
  174         sfxge_intr_stop(sc);
  175 
  176         efx_nic_fini(sc->enp);
  177 
  178         sc->ifnet->if_drv_flags &= ~IFF_DRV_RUNNING;
  179 }
  180 
  181 static int
  182 sfxge_if_ioctl(struct ifnet *ifp, unsigned long command, caddr_t data)
  183 {
  184         struct sfxge_softc *sc;
  185         struct ifreq *ifr;
  186         int error;
  187 
  188         ifr = (struct ifreq *)data;
  189         sc = ifp->if_softc;
  190         error = 0;
  191 
  192         switch (command) {
  193         case SIOCSIFFLAGS:
  194                 sx_xlock(&sc->softc_lock);
  195                 if (ifp->if_flags & IFF_UP) {
  196                         if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
  197                                 if ((ifp->if_flags ^ sc->if_flags) &
  198                                     (IFF_PROMISC | IFF_ALLMULTI)) {
  199                                         sfxge_mac_filter_set(sc);
  200                                 }
  201                         } else
  202                                 sfxge_start(sc);
  203                 } else
  204                         if (ifp->if_drv_flags & IFF_DRV_RUNNING)
  205                                 sfxge_stop(sc);
  206                 sc->if_flags = ifp->if_flags;
  207                 sx_xunlock(&sc->softc_lock);
  208                 break;
  209         case SIOCSIFMTU:
  210                 if (ifr->ifr_mtu == ifp->if_mtu) {
  211                         /* Nothing to do */
  212                         error = 0;
  213                 } else if (ifr->ifr_mtu > SFXGE_MAX_MTU) {
  214                         error = EINVAL;
  215                 } else if (!(ifp->if_drv_flags & IFF_DRV_RUNNING)) {
  216                         ifp->if_mtu = ifr->ifr_mtu;
  217                         error = 0;
  218                 } else {
  219                         /* Restart required */
  220                         sx_xlock(&sc->softc_lock);
  221                         sfxge_stop(sc);
  222                         ifp->if_mtu = ifr->ifr_mtu;
  223                         error = sfxge_start(sc);
  224                         sx_xunlock(&sc->softc_lock);
  225                         if (error) {
  226                                 ifp->if_flags &= ~IFF_UP;
  227                                 ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
  228                                 if_down(ifp);
  229                         }
  230                 }
  231                 break;
  232         case SIOCADDMULTI:
  233         case SIOCDELMULTI:
  234                 if (ifp->if_drv_flags & IFF_DRV_RUNNING)
  235                         sfxge_mac_filter_set(sc);
  236                 break;
  237         case SIOCSIFCAP:
  238                 sx_xlock(&sc->softc_lock);
  239 
  240                 /*
  241                  * The networking core already rejects attempts to
  242                  * enable capabilities we don't have.  We still have
  243                  * to reject attempts to disable capabilities that we
  244                  * can't (yet) disable.
  245                  */
  246                 if (~ifr->ifr_reqcap & SFXGE_CAP_FIXED) {
  247                         error = EINVAL;
  248                         sx_xunlock(&sc->softc_lock);
  249                         break;
  250                 }
  251 
  252                 ifp->if_capenable = ifr->ifr_reqcap;
  253                 if (ifp->if_capenable & IFCAP_TXCSUM)
  254                         ifp->if_hwassist |= (CSUM_IP | CSUM_TCP | CSUM_UDP);
  255                 else
  256                         ifp->if_hwassist &= ~(CSUM_IP | CSUM_TCP | CSUM_UDP);
  257                 if (ifp->if_capenable & IFCAP_TSO)
  258                         ifp->if_hwassist |= CSUM_TSO;
  259                 else
  260                         ifp->if_hwassist &= ~CSUM_TSO;
  261 
  262                 sx_xunlock(&sc->softc_lock);
  263                 break;
  264         case SIOCSIFMEDIA:
  265         case SIOCGIFMEDIA:
  266                 error = ifmedia_ioctl(ifp, ifr, &sc->media, command);
  267                 break;
  268         default:
  269                 error = ether_ioctl(ifp, command, data);
  270         }
  271 
  272         return (error);
  273 }
  274 
  275 static void
  276 sfxge_ifnet_fini(struct ifnet *ifp)
  277 {
  278         struct sfxge_softc *sc = ifp->if_softc;
  279 
  280         sx_xlock(&sc->softc_lock);
  281         sfxge_stop(sc);
  282         sx_xunlock(&sc->softc_lock);
  283 
  284         ifmedia_removeall(&sc->media);
  285         ether_ifdetach(ifp);
  286         if_free(ifp);
  287 }
  288 
  289 static int 
  290 sfxge_ifnet_init(struct ifnet *ifp, struct sfxge_softc *sc)
  291 {
  292         const efx_nic_cfg_t *encp = efx_nic_cfg_get(sc->enp);
  293         device_t dev;
  294         int rc;
  295 
  296         dev = sc->dev;
  297         sc->ifnet = ifp;
  298 
  299         if_initname(ifp, device_get_name(dev), device_get_unit(dev));
  300         ifp->if_init = sfxge_if_init;
  301         ifp->if_softc = sc;
  302         ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
  303         ifp->if_ioctl = sfxge_if_ioctl;
  304 
  305         ifp->if_capabilities = SFXGE_CAP;
  306         ifp->if_capenable = SFXGE_CAP_ENABLE;
  307         ifp->if_hwassist = CSUM_TCP | CSUM_UDP | CSUM_IP | CSUM_TSO;
  308 
  309         ether_ifattach(ifp, encp->enc_mac_addr);
  310 
  311 #ifdef SFXGE_HAVE_MQ
  312         ifp->if_transmit = sfxge_if_transmit;
  313         ifp->if_qflush = sfxge_if_qflush;
  314 #else
  315         ifp->if_start = sfxge_if_start;
  316         IFQ_SET_MAXLEN(&ifp->if_snd, SFXGE_NDESCS - 1);
  317         ifp->if_snd.ifq_drv_maxlen = SFXGE_NDESCS - 1;
  318         IFQ_SET_READY(&ifp->if_snd);
  319 
  320         mtx_init(&sc->tx_lock, "txq", NULL, MTX_DEF);
  321 #endif
  322 
  323         if ((rc = sfxge_port_ifmedia_init(sc)) != 0)
  324                 goto fail;
  325 
  326         return 0;
  327 
  328 fail:
  329         ether_ifdetach(sc->ifnet);
  330         return rc;
  331 }
  332 
  333 void
  334 sfxge_sram_buf_tbl_alloc(struct sfxge_softc *sc, size_t n, uint32_t *idp)
  335 {
  336         KASSERT(sc->buffer_table_next + n <=
  337                 efx_nic_cfg_get(sc->enp)->enc_buftbl_limit,
  338                 ("buffer table full"));
  339 
  340         *idp = sc->buffer_table_next;
  341         sc->buffer_table_next += n;
  342 }
  343 
  344 static int
  345 sfxge_bar_init(struct sfxge_softc *sc)
  346 {
  347         efsys_bar_t *esbp = &sc->bar;
  348 
  349         esbp->esb_rid = PCIR_BAR(EFX_MEM_BAR);  
  350         if ((esbp->esb_res = bus_alloc_resource_any(sc->dev, SYS_RES_MEMORY,
  351             &esbp->esb_rid, RF_ACTIVE)) == NULL) {
  352                 device_printf(sc->dev, "Cannot allocate BAR region %d\n",
  353                     EFX_MEM_BAR);
  354                 return (ENXIO);
  355         }
  356         esbp->esb_tag = rman_get_bustag(esbp->esb_res);
  357         esbp->esb_handle = rman_get_bushandle(esbp->esb_res);
  358         mtx_init(&esbp->esb_lock, "sfxge_efsys_bar", NULL, MTX_DEF);
  359 
  360         return (0);
  361 }
  362 
  363 static void
  364 sfxge_bar_fini(struct sfxge_softc *sc)
  365 {
  366         efsys_bar_t *esbp = &sc->bar;
  367 
  368         bus_release_resource(sc->dev, SYS_RES_MEMORY, esbp->esb_rid,
  369             esbp->esb_res);
  370         mtx_destroy(&esbp->esb_lock);
  371 }
  372 
  373 static int
  374 sfxge_create(struct sfxge_softc *sc)
  375 {
  376         device_t dev;
  377         efx_nic_t *enp;
  378         int error;
  379 
  380         dev = sc->dev;
  381 
  382         sx_init(&sc->softc_lock, "sfxge_softc");
  383 
  384         sc->stats_node = SYSCTL_ADD_NODE(
  385                 device_get_sysctl_ctx(dev),
  386                 SYSCTL_CHILDREN(device_get_sysctl_tree(dev)),
  387                 OID_AUTO, "stats", CTLFLAG_RD, NULL, "Statistics");
  388         if (!sc->stats_node) {
  389                 error = ENOMEM;
  390                 goto fail;
  391         }
  392 
  393         TASK_INIT(&sc->task_reset, 0, sfxge_reset, sc);
  394 
  395         (void) pci_enable_busmaster(dev);
  396 
  397         /* Initialize DMA mappings. */
  398         if ((error = sfxge_dma_init(sc)) != 0)
  399                 goto fail;
  400 
  401         /* Map the device registers. */
  402         if ((error = sfxge_bar_init(sc)) != 0)
  403                 goto fail;
  404 
  405         error = efx_family(pci_get_vendor(dev), pci_get_device(dev),
  406             &sc->family);
  407         KASSERT(error == 0, ("Family should be filtered by sfxge_probe()"));
  408 
  409         /* Create the common code nic object. */
  410         mtx_init(&sc->enp_lock, "sfxge_nic", NULL, MTX_DEF);
  411         if ((error = efx_nic_create(sc->family, (efsys_identifier_t *)sc,
  412             &sc->bar, &sc->enp_lock, &enp)) != 0)
  413                 goto fail3;
  414         sc->enp = enp;
  415 
  416         /* Initialize MCDI to talk to the microcontroller. */
  417         if ((error = sfxge_mcdi_init(sc)) != 0)
  418                 goto fail4;
  419 
  420         /* Probe the NIC and build the configuration data area. */
  421         if ((error = efx_nic_probe(enp)) != 0)
  422                 goto fail5;
  423 
  424         /* Initialize the NVRAM. */
  425         if ((error = efx_nvram_init(enp)) != 0)
  426                 goto fail6;
  427 
  428         /* Initialize the VPD. */
  429         if ((error = efx_vpd_init(enp)) != 0)
  430                 goto fail7;
  431 
  432         /* Reset the NIC. */
  433         if ((error = efx_nic_reset(enp)) != 0)
  434                 goto fail8;
  435 
  436         /* Initialize buffer table allocation. */
  437         sc->buffer_table_next = 0;
  438 
  439         /* Set up interrupts. */
  440         if ((error = sfxge_intr_init(sc)) != 0)
  441                 goto fail8;
  442 
  443         /* Initialize event processing state. */
  444         if ((error = sfxge_ev_init(sc)) != 0)
  445                 goto fail11;
  446 
  447         /* Initialize receive state. */
  448         if ((error = sfxge_rx_init(sc)) != 0)
  449                 goto fail12;
  450 
  451         /* Initialize transmit state. */
  452         if ((error = sfxge_tx_init(sc)) != 0)
  453                 goto fail13;
  454 
  455         /* Initialize port state. */
  456         if ((error = sfxge_port_init(sc)) != 0)
  457                 goto fail14;
  458 
  459         sc->init_state = SFXGE_INITIALIZED;
  460 
  461         return (0);
  462 
  463 fail14:
  464         sfxge_tx_fini(sc);
  465 
  466 fail13:
  467         sfxge_rx_fini(sc);
  468 
  469 fail12:
  470         sfxge_ev_fini(sc);
  471 
  472 fail11:
  473         sfxge_intr_fini(sc);
  474 
  475 fail8:
  476         efx_vpd_fini(enp);
  477 
  478 fail7:
  479         efx_nvram_fini(enp);
  480 
  481 fail6:
  482         efx_nic_unprobe(enp);
  483 
  484 fail5:
  485         sfxge_mcdi_fini(sc);
  486 
  487 fail4:
  488         sc->enp = NULL;
  489         efx_nic_destroy(enp);
  490         mtx_destroy(&sc->enp_lock);
  491 
  492 fail3:
  493         sfxge_bar_fini(sc);
  494         (void) pci_disable_busmaster(sc->dev);
  495 
  496 fail:
  497         sc->dev = NULL;
  498         sx_destroy(&sc->softc_lock);
  499         return (error);
  500 }
  501 
  502 static void
  503 sfxge_destroy(struct sfxge_softc *sc)
  504 {
  505         efx_nic_t *enp;
  506 
  507         /* Clean up port state. */
  508         sfxge_port_fini(sc);
  509 
  510         /* Clean up transmit state. */
  511         sfxge_tx_fini(sc);
  512 
  513         /* Clean up receive state. */
  514         sfxge_rx_fini(sc);
  515 
  516         /* Clean up event processing state. */
  517         sfxge_ev_fini(sc);
  518 
  519         /* Clean up interrupts. */
  520         sfxge_intr_fini(sc);
  521 
  522         /* Tear down common code subsystems. */
  523         efx_nic_reset(sc->enp);
  524         efx_vpd_fini(sc->enp);
  525         efx_nvram_fini(sc->enp);
  526         efx_nic_unprobe(sc->enp);
  527 
  528         /* Tear down MCDI. */
  529         sfxge_mcdi_fini(sc);
  530 
  531         /* Destroy common code context. */
  532         enp = sc->enp;
  533         sc->enp = NULL;
  534         efx_nic_destroy(enp);
  535 
  536         /* Free DMA memory. */
  537         sfxge_dma_fini(sc);
  538 
  539         /* Free mapped BARs. */
  540         sfxge_bar_fini(sc);
  541 
  542         (void) pci_disable_busmaster(sc->dev);
  543 
  544         taskqueue_drain(taskqueue_thread, &sc->task_reset);
  545 
  546         /* Destroy the softc lock. */
  547         sx_destroy(&sc->softc_lock);
  548 }
  549 
  550 static int
  551 sfxge_vpd_handler(SYSCTL_HANDLER_ARGS)
  552 {
  553         struct sfxge_softc *sc = arg1;
  554         efx_vpd_value_t value;
  555         int rc;
  556         
  557         value.evv_tag = arg2 >> 16;
  558         value.evv_keyword = arg2 & 0xffff;
  559         if ((rc = efx_vpd_get(sc->enp, sc->vpd_data, sc->vpd_size, &value))
  560             != 0)
  561                 return rc;
  562 
  563         return SYSCTL_OUT(req, value.evv_value, value.evv_length);
  564 }
  565 
  566 static void
  567 sfxge_vpd_try_add(struct sfxge_softc *sc, struct sysctl_oid_list *list,
  568                   efx_vpd_tag_t tag, const char *keyword)
  569 {
  570         struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(sc->dev);
  571         efx_vpd_value_t value;
  572 
  573         /* Check whether VPD tag/keyword is present */
  574         value.evv_tag = tag;
  575         value.evv_keyword = EFX_VPD_KEYWORD(keyword[0], keyword[1]);
  576         if (efx_vpd_get(sc->enp, sc->vpd_data, sc->vpd_size, &value) != 0)
  577                 return;
  578 
  579         SYSCTL_ADD_PROC(
  580                 ctx, list, OID_AUTO, keyword, CTLTYPE_STRING|CTLFLAG_RD,
  581                 sc, tag << 16 | EFX_VPD_KEYWORD(keyword[0], keyword[1]),
  582                 sfxge_vpd_handler, "A", "");
  583 }
  584 
  585 static int
  586 sfxge_vpd_init(struct sfxge_softc *sc)
  587 {
  588         struct sysctl_ctx_list *ctx = device_get_sysctl_ctx(sc->dev);
  589         struct sysctl_oid *vpd_node;
  590         struct sysctl_oid_list *vpd_list;
  591         char keyword[3];
  592         efx_vpd_value_t value;
  593         int rc;
  594 
  595         if ((rc = efx_vpd_size(sc->enp, &sc->vpd_size)) != 0)
  596                 goto fail;
  597         sc->vpd_data = malloc(sc->vpd_size, M_SFXGE, M_WAITOK);
  598         if ((rc = efx_vpd_read(sc->enp, sc->vpd_data, sc->vpd_size)) != 0)
  599                 goto fail2;
  600 
  601         /* Copy ID (product name) into device description, and log it. */
  602         value.evv_tag = EFX_VPD_ID;
  603         if (efx_vpd_get(sc->enp, sc->vpd_data, sc->vpd_size, &value) == 0) {
  604                 value.evv_value[value.evv_length] = 0;
  605                 device_set_desc_copy(sc->dev, value.evv_value);
  606                 device_printf(sc->dev, "%s\n", value.evv_value);
  607         }
  608 
  609         vpd_node = SYSCTL_ADD_NODE(
  610                 ctx, SYSCTL_CHILDREN(device_get_sysctl_tree(sc->dev)),
  611                 OID_AUTO, "vpd", CTLFLAG_RD, NULL, "Vital Product Data");
  612         vpd_list = SYSCTL_CHILDREN(vpd_node);
  613 
  614         /* Add sysctls for all expected and any vendor-defined keywords. */
  615         sfxge_vpd_try_add(sc, vpd_list, EFX_VPD_RO, "PN");
  616         sfxge_vpd_try_add(sc, vpd_list, EFX_VPD_RO, "EC");
  617         sfxge_vpd_try_add(sc, vpd_list, EFX_VPD_RO, "SN");
  618         keyword[0] = 'V';
  619         keyword[2] = 0;
  620         for (keyword[1] = ''; keyword[1] <= '9'; keyword[1]++)
  621                 sfxge_vpd_try_add(sc, vpd_list, EFX_VPD_RO, keyword);
  622         for (keyword[1] = 'A'; keyword[1] <= 'Z'; keyword[1]++)
  623                 sfxge_vpd_try_add(sc, vpd_list, EFX_VPD_RO, keyword);
  624 
  625         return 0;
  626         
  627 fail2:
  628         free(sc->vpd_data, M_SFXGE);
  629 fail:
  630         return rc;
  631 }
  632 
  633 static void
  634 sfxge_vpd_fini(struct sfxge_softc *sc)
  635 {
  636         free(sc->vpd_data, M_SFXGE);
  637 }
  638 
  639 static void
  640 sfxge_reset(void *arg, int npending)
  641 {
  642         struct sfxge_softc *sc;
  643         int rc;
  644 
  645         (void)npending;
  646 
  647         sc = (struct sfxge_softc *)arg;
  648 
  649         sx_xlock(&sc->softc_lock);
  650 
  651         if (sc->init_state != SFXGE_STARTED)
  652                 goto done;
  653 
  654         sfxge_stop(sc);
  655         efx_nic_reset(sc->enp);
  656         if ((rc = sfxge_start(sc)) != 0)
  657                 device_printf(sc->dev,
  658                               "reset failed (%d); interface is now stopped\n",
  659                               rc);
  660 
  661 done:
  662         sx_xunlock(&sc->softc_lock);
  663 }
  664 
  665 void
  666 sfxge_schedule_reset(struct sfxge_softc *sc)
  667 {
  668         taskqueue_enqueue(taskqueue_thread, &sc->task_reset);
  669 }
  670 
  671 static int
  672 sfxge_attach(device_t dev)
  673 {
  674         struct sfxge_softc *sc;
  675         struct ifnet *ifp;
  676         int error;
  677 
  678         sc = device_get_softc(dev);
  679         sc->dev = dev;
  680 
  681         /* Allocate ifnet. */
  682         ifp = if_alloc(IFT_ETHER);
  683         if (ifp == NULL) {
  684                 device_printf(dev, "Couldn't allocate ifnet\n");
  685                 error = ENOMEM;
  686                 goto fail;
  687         }
  688         sc->ifnet = ifp;
  689 
  690         /* Initialize hardware. */
  691         if ((error = sfxge_create(sc)) != 0)
  692                 goto fail2;
  693 
  694         /* Create the ifnet for the port. */
  695         if ((error = sfxge_ifnet_init(ifp, sc)) != 0)
  696                 goto fail3;
  697 
  698         if ((error = sfxge_vpd_init(sc)) != 0)
  699                 goto fail4;
  700 
  701         sc->init_state = SFXGE_REGISTERED;
  702 
  703         return (0);
  704 
  705 fail4:
  706         sfxge_ifnet_fini(ifp);
  707 fail3:
  708         sfxge_destroy(sc);
  709 
  710 fail2:
  711         if_free(sc->ifnet);
  712 
  713 fail:
  714         return (error);
  715 }
  716 
  717 static int
  718 sfxge_detach(device_t dev)
  719 {
  720         struct sfxge_softc *sc;
  721 
  722         sc = device_get_softc(dev);
  723 
  724         sfxge_vpd_fini(sc);
  725 
  726         /* Destroy the ifnet. */
  727         sfxge_ifnet_fini(sc->ifnet);
  728 
  729         /* Tear down hardware. */
  730         sfxge_destroy(sc);
  731 
  732         return (0);
  733 }
  734 
  735 static int
  736 sfxge_probe(device_t dev)
  737 {
  738         uint16_t pci_vendor_id;
  739         uint16_t pci_device_id;
  740         efx_family_t family;
  741         int rc;
  742 
  743         pci_vendor_id = pci_get_vendor(dev);
  744         pci_device_id = pci_get_device(dev);
  745 
  746         rc = efx_family(pci_vendor_id, pci_device_id, &family);
  747         if (rc)
  748                 return ENXIO;
  749 
  750         KASSERT(family == EFX_FAMILY_SIENA, ("impossible controller family"));
  751         device_set_desc(dev, "Solarflare SFC9000 family");
  752         return 0;
  753 }
  754 
  755 static device_method_t sfxge_methods[] = {
  756         DEVMETHOD(device_probe,         sfxge_probe),
  757         DEVMETHOD(device_attach,        sfxge_attach),
  758         DEVMETHOD(device_detach,        sfxge_detach),
  759 
  760         DEVMETHOD_END
  761 };
  762 
  763 static devclass_t sfxge_devclass;
  764 
  765 static driver_t sfxge_driver = {
  766         "sfxge",
  767         sfxge_methods,
  768         sizeof(struct sfxge_softc)
  769 };
  770 
  771 DRIVER_MODULE(sfxge, pci, sfxge_driver, sfxge_devclass, 0, 0);

Cache object: 36aa6dee445dfb1ece13ed5b6d7f32b0


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