The Design and Implementation of the FreeBSD Operating System, Second Edition
Now available: The Design and Implementation of the FreeBSD Operating System (Second Edition)


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FreeBSD/Linux Kernel Cross Reference
sys/dev/nve/if_nve.c

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    1 /*-
    2  * Copyright (c) 2005 by David E. O'Brien <obrien@FreeBSD.org>.
    3  * Copyright (c) 2003,2004 by Quinton Dolan <q@onthenet.com.au>. 
    4  * All rights reserved.
    5  * 
    6  * Redistribution and use in source and binary forms, with or without
    7  * modification, are permitted provided that the following conditions 
    8  * are met: 
    9  * 1. Redistributions of source code must retain the above copyright
   10  *    notice, this list of conditions and the following disclaimer. 
   11  * 2. Redistributions in binary form must reproduce the above copyright 
   12  *    notice, this list of conditions and the following disclaimer in the 
   13  *    documentation and/or other materials provided with the distribution.
   14  * 
   15  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND ANY
   16  * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
   17  * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
   18  * DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE FOR
   19  * ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
   21  * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
   22  * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   23  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   24  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   25  * SUCH DAMAGE.
   26  * 
   27  * $Id: if_nv.c,v 1.19 2004/08/12 14:00:05 q Exp $
   28  */
   29 /*
   30  * NVIDIA nForce MCP Networking Adapter driver
   31  * 
   32  * This is a port of the NVIDIA MCP Linux ethernet driver distributed by NVIDIA
   33  * through their web site.
   34  * 
   35  * All mainstream nForce and nForce2 motherboards are supported. This module
   36  * is as stable, sometimes more stable, than the linux version. (Recent
   37  * Linux stability issues seem to be related to some issues with newer
   38  * distributions using GCC 3.x, however this don't appear to effect FreeBSD
   39  * 5.x).
   40  * 
   41  * In accordance with the NVIDIA distribution license it is necessary to
   42  * link this module against the nvlibnet.o binary object included in the
   43  * Linux driver source distribution. The binary component is not modified in
   44  * any way and is simply linked against a FreeBSD equivalent of the nvnet.c
   45  * linux kernel module "wrapper".
   46  * 
   47  * The Linux driver uses a common code API that is shared between Win32 and
   48  * i386 Linux. This abstracts the low level driver functions and uses
   49  * callbacks and hooks to access the underlying hardware device. By using
   50  * this same API in a FreeBSD kernel module it is possible to support the
   51  * hardware without breaching the Linux source distributions licensing
   52  * requirements, or obtaining the hardware programming specifications.
   53  * 
   54  * Although not conventional, it works, and given the relatively small
   55  * amount of hardware centric code, it's hopefully no more buggy than its
   56  * linux counterpart.
   57  *
   58  * NVIDIA now support the nForce3 AMD64 platform, however I have been
   59  * unable to access such a system to verify support. However, the code is
   60  * reported to work with little modification when compiled with the AMD64
   61  * version of the NVIDIA Linux library. All that should be necessary to make
   62  * the driver work is to link it directly into the kernel, instead of as a
   63  * module, and apply the docs/amd64.diff patch in this source distribution to
   64  * the NVIDIA Linux driver source.
   65  *
   66  * This driver should work on all versions of FreeBSD since 4.9/5.1 as well
   67  * as recent versions of DragonFly.
   68  *
   69  * Written by Quinton Dolan <q@onthenet.com.au> 
   70  * Portions based on existing FreeBSD network drivers. 
   71  * NVIDIA API usage derived from distributed NVIDIA NVNET driver source files.
   72  */
   73 
   74 #include <sys/cdefs.h>
   75 __FBSDID("$FreeBSD$");
   76 
   77 #include <sys/param.h>
   78 #include <sys/systm.h>
   79 #include <sys/sockio.h>
   80 #include <sys/mbuf.h>
   81 #include <sys/malloc.h>
   82 #include <sys/kernel.h>
   83 #include <sys/socket.h>
   84 #include <sys/sysctl.h>
   85 #include <sys/queue.h>
   86 #include <sys/module.h>
   87 
   88 #include <net/if.h>
   89 #include <net/if_arp.h>
   90 #include <net/ethernet.h>
   91 #include <net/if_dl.h>
   92 #include <net/if_media.h>
   93 #include <net/if_types.h>
   94 #include <net/bpf.h>
   95 #include <net/if_vlan_var.h>
   96 
   97 #include <machine/bus.h>
   98 #include <machine/resource.h>
   99 
  100 #include <vm/vm.h>              /* for vtophys */
  101 #include <vm/pmap.h>            /* for vtophys */
  102 #include <sys/bus.h>
  103 #include <sys/rman.h>
  104 
  105 #include <dev/pci/pcireg.h>
  106 #include <dev/pci/pcivar.h>
  107 #include <dev/mii/mii.h>
  108 #include <dev/mii/miivar.h>
  109 #include "miibus_if.h"
  110 
  111 /* Include NVIDIA Linux driver header files */
  112 #include <contrib/dev/nve/nvenet_version.h>
  113 #define linux
  114 #include <contrib/dev/nve/basetype.h>
  115 #include <contrib/dev/nve/phy.h>
  116 #include "os+%DIKED-nve.h"
  117 #include <contrib/dev/nve/drvinfo.h>
  118 #include <contrib/dev/nve/adapter.h>
  119 #undef linux
  120 
  121 #include <dev/nve/if_nvereg.h>
  122 
  123 MODULE_DEPEND(nve, pci, 1, 1, 1);
  124 MODULE_DEPEND(nve, ether, 1, 1, 1);
  125 MODULE_DEPEND(nve, miibus, 1, 1, 1);
  126 
  127 static int      nve_probe(device_t);
  128 static int      nve_attach(device_t);
  129 static int      nve_detach(device_t);
  130 static void     nve_init(void *);
  131 static void     nve_init_locked(struct nve_softc *);
  132 static void     nve_stop(struct nve_softc *);
  133 static int      nve_shutdown(device_t);
  134 static int      nve_init_rings(struct nve_softc *);
  135 static void     nve_free_rings(struct nve_softc *);
  136 
  137 static void     nve_ifstart(struct ifnet *);
  138 static void     nve_ifstart_locked(struct ifnet *);
  139 static int      nve_ioctl(struct ifnet *, u_long, caddr_t);
  140 static void     nve_intr(void *);
  141 static void     nve_tick(void *);
  142 static void     nve_setmulti(struct nve_softc *);
  143 static void     nve_watchdog(struct ifnet *);
  144 static void     nve_update_stats(struct nve_softc *);
  145 
  146 static int      nve_ifmedia_upd(struct ifnet *);
  147 static void     nve_ifmedia_upd_locked(struct ifnet *);
  148 static void     nve_ifmedia_sts(struct ifnet *, struct ifmediareq *);
  149 static int      nve_miibus_readreg(device_t, int, int);
  150 static void     nve_miibus_writereg(device_t, int, int, int);
  151 
  152 static void     nve_dmamap_cb(void *, bus_dma_segment_t *, int, int);
  153 static void     nve_dmamap_tx_cb(void *, bus_dma_segment_t *, int, bus_size_t, int);
  154 
  155 static NV_SINT32 nve_osalloc(PNV_VOID, PMEMORY_BLOCK);
  156 static NV_SINT32 nve_osfree(PNV_VOID, PMEMORY_BLOCK);
  157 static NV_SINT32 nve_osallocex(PNV_VOID, PMEMORY_BLOCKEX);
  158 static NV_SINT32 nve_osfreeex(PNV_VOID, PMEMORY_BLOCKEX);
  159 static NV_SINT32 nve_osclear(PNV_VOID, PNV_VOID, NV_SINT32);
  160 static NV_SINT32 nve_osdelay(PNV_VOID, NV_UINT32);
  161 static NV_SINT32 nve_osallocrxbuf(PNV_VOID, PMEMORY_BLOCK, PNV_VOID *);
  162 static NV_SINT32 nve_osfreerxbuf(PNV_VOID, PMEMORY_BLOCK, PNV_VOID);
  163 static NV_SINT32 nve_ospackettx(PNV_VOID, PNV_VOID, NV_UINT32);
  164 static NV_SINT32 nve_ospacketrx(PNV_VOID, PNV_VOID, NV_UINT32, NV_UINT8 *, NV_UINT8);
  165 static NV_SINT32 nve_oslinkchg(PNV_VOID, NV_SINT32);
  166 static NV_SINT32 nve_osalloctimer(PNV_VOID, PNV_VOID *);
  167 static NV_SINT32 nve_osfreetimer(PNV_VOID, PNV_VOID);
  168 static NV_SINT32 nve_osinittimer(PNV_VOID, PNV_VOID, PTIMER_FUNC, PNV_VOID);
  169 static NV_SINT32 nve_ossettimer(PNV_VOID, PNV_VOID, NV_UINT32);
  170 static NV_SINT32 nve_oscanceltimer(PNV_VOID, PNV_VOID);
  171 
  172 static NV_SINT32 nve_ospreprocpkt(PNV_VOID, PNV_VOID, PNV_VOID *, NV_UINT8 *, NV_UINT8);
  173 static PNV_VOID  nve_ospreprocpktnopq(PNV_VOID, PNV_VOID);
  174 static NV_SINT32 nve_osindicatepkt(PNV_VOID, PNV_VOID *, NV_UINT32);
  175 static NV_SINT32 nve_oslockalloc(PNV_VOID, NV_SINT32, PNV_VOID *);
  176 static NV_SINT32 nve_oslockacquire(PNV_VOID, NV_SINT32, PNV_VOID);
  177 static NV_SINT32 nve_oslockrelease(PNV_VOID, NV_SINT32, PNV_VOID);
  178 static PNV_VOID  nve_osreturnbufvirt(PNV_VOID, PNV_VOID);
  179 
  180 static device_method_t nve_methods[] = {
  181         /* Device interface */
  182         DEVMETHOD(device_probe, nve_probe),
  183         DEVMETHOD(device_attach, nve_attach),
  184         DEVMETHOD(device_detach, nve_detach),
  185         DEVMETHOD(device_shutdown, nve_shutdown),
  186 
  187         /* Bus interface */
  188         DEVMETHOD(bus_print_child, bus_generic_print_child),
  189         DEVMETHOD(bus_driver_added, bus_generic_driver_added),
  190 
  191         /* MII interface */
  192         DEVMETHOD(miibus_readreg, nve_miibus_readreg),
  193         DEVMETHOD(miibus_writereg, nve_miibus_writereg),
  194 
  195         {0, 0}
  196 };
  197 
  198 static driver_t nve_driver = {
  199         "nve",
  200         nve_methods,
  201         sizeof(struct nve_softc)
  202 };
  203 
  204 static devclass_t nve_devclass;
  205 
  206 static int      nve_pollinterval = 0;
  207 SYSCTL_INT(_hw, OID_AUTO, nve_pollinterval, CTLFLAG_RW,
  208            &nve_pollinterval, 0, "delay between interface polls");
  209 
  210 DRIVER_MODULE(nve, pci, nve_driver, nve_devclass, 0, 0);
  211 DRIVER_MODULE(miibus, nve, miibus_driver, miibus_devclass, 0, 0);
  212 
  213 static struct nve_type nve_devs[] = {
  214         {NVIDIA_VENDORID, NFORCE_MCPNET1_DEVICEID,
  215         "NVIDIA nForce MCP Networking Adapter"},
  216         {NVIDIA_VENDORID, NFORCE_MCPNET2_DEVICEID,
  217         "NVIDIA nForce MCP2 Networking Adapter"},
  218         {NVIDIA_VENDORID, NFORCE_MCPNET3_DEVICEID,
  219         "NVIDIA nForce MCP3 Networking Adapter"},
  220         {NVIDIA_VENDORID, NFORCE_MCPNET4_DEVICEID,
  221         "NVIDIA nForce MCP4 Networking Adapter"},
  222         {NVIDIA_VENDORID, NFORCE_MCPNET5_DEVICEID,
  223         "NVIDIA nForce MCP5 Networking Adapter"},
  224         {NVIDIA_VENDORID, NFORCE_MCPNET6_DEVICEID,
  225         "NVIDIA nForce MCP6 Networking Adapter"},
  226         {NVIDIA_VENDORID, NFORCE_MCPNET7_DEVICEID,
  227         "NVIDIA nForce MCP7 Networking Adapter"},
  228         {NVIDIA_VENDORID, NFORCE_MCPNET8_DEVICEID,
  229         "NVIDIA nForce MCP8 Networking Adapter"},
  230         {NVIDIA_VENDORID, NFORCE_MCPNET9_DEVICEID,
  231         "NVIDIA nForce MCP9 Networking Adapter"},
  232         {NVIDIA_VENDORID, NFORCE_MCPNET10_DEVICEID,
  233         "NVIDIA nForce MCP10 Networking Adapter"},
  234         {NVIDIA_VENDORID, NFORCE_MCPNET11_DEVICEID,
  235         "NVIDIA nForce MCP11 Networking Adapter"},
  236         {NVIDIA_VENDORID, NFORCE_MCPNET12_DEVICEID,
  237         "NVIDIA nForce MCP12 Networking Adapter"},
  238         {NVIDIA_VENDORID, NFORCE_MCPNET13_DEVICEID,
  239         "NVIDIA nForce MCP13 Networking Adapter"},
  240         {0, 0, NULL}
  241 };
  242 
  243 /* DMA MEM map callback function to get data segment physical address */
  244 static void
  245 nve_dmamap_cb(void *arg, bus_dma_segment_t * segs, int nsegs, int error)
  246 {
  247         if (error)
  248                 return;
  249 
  250         KASSERT(nsegs == 1,
  251             ("Too many DMA segments returned when mapping DMA memory"));
  252         *(bus_addr_t *)arg = segs->ds_addr;
  253 }
  254 
  255 /* DMA RX map callback function to get data segment physical address */
  256 static void
  257 nve_dmamap_rx_cb(void *arg, bus_dma_segment_t * segs, int nsegs,
  258     bus_size_t mapsize, int error)
  259 {
  260         if (error)
  261                 return;
  262         *(bus_addr_t *)arg = segs->ds_addr;
  263 }
  264 
  265 /*
  266  * DMA TX buffer callback function to allocate fragment data segment
  267  * addresses
  268  */
  269 static void
  270 nve_dmamap_tx_cb(void *arg, bus_dma_segment_t * segs, int nsegs, bus_size_t mapsize, int error)
  271 {
  272         struct nve_tx_desc *info;
  273 
  274         info = arg;
  275         if (error)
  276                 return;
  277         KASSERT(nsegs < NV_MAX_FRAGS,
  278             ("Too many DMA segments returned when mapping mbuf"));
  279         info->numfrags = nsegs;
  280         bcopy(segs, info->frags, nsegs * sizeof(bus_dma_segment_t));
  281 }
  282 
  283 /* Probe for supported hardware ID's */
  284 static int
  285 nve_probe(device_t dev)
  286 {
  287         struct nve_type *t;
  288 
  289         t = nve_devs;
  290         /* Check for matching PCI DEVICE ID's */
  291         while (t->name != NULL) {
  292                 if ((pci_get_vendor(dev) == t->vid_id) &&
  293                     (pci_get_device(dev) == t->dev_id)) {
  294                         device_set_desc(dev, t->name);
  295                         return (BUS_PROBE_LOW_PRIORITY);
  296                 }
  297                 t++;
  298         }
  299 
  300         return (ENXIO);
  301 }
  302 
  303 /* Attach driver and initialise hardware for use */
  304 static int
  305 nve_attach(device_t dev)
  306 {
  307         u_char                  eaddr[ETHER_ADDR_LEN];
  308         struct nve_softc        *sc;
  309         struct ifnet            *ifp;
  310         OS_API                  *osapi;
  311         ADAPTER_OPEN_PARAMS     OpenParams;
  312         int                     error = 0, i, rid;
  313 
  314         if (bootverbose)
  315                 device_printf(dev, "nvenetlib.o version %s\n", DRIVER_VERSION);
  316 
  317         DEBUGOUT(NVE_DEBUG_INIT, "nve: nve_attach - entry\n");
  318 
  319         sc = device_get_softc(dev);
  320 
  321         /* Allocate mutex */
  322         mtx_init(&sc->mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK,
  323             MTX_DEF);
  324         callout_init_mtx(&sc->stat_callout, &sc->mtx, 0);
  325 
  326         sc->dev = dev;
  327 
  328         /* Preinitialize data structures */
  329         bzero(&OpenParams, sizeof(ADAPTER_OPEN_PARAMS));
  330 
  331         /* Enable bus mastering */
  332         pci_enable_busmaster(dev);
  333 
  334         /* Allocate memory mapped address space */
  335         rid = NV_RID;
  336         sc->res = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid, 0, ~0, 1,
  337             RF_ACTIVE);
  338 
  339         if (sc->res == NULL) {
  340                 device_printf(dev, "couldn't map memory\n");
  341                 error = ENXIO;
  342                 goto fail;
  343         }
  344         sc->sc_st = rman_get_bustag(sc->res);
  345         sc->sc_sh = rman_get_bushandle(sc->res);
  346 
  347         /* Allocate interrupt */
  348         rid = 0;
  349         sc->irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0, ~0, 1,
  350             RF_SHAREABLE | RF_ACTIVE);
  351 
  352         if (sc->irq == NULL) {
  353                 device_printf(dev, "couldn't map interrupt\n");
  354                 error = ENXIO;
  355                 goto fail;
  356         }
  357         /* Allocate DMA tags */
  358         error = bus_dma_tag_create(NULL, 4, 0, BUS_SPACE_MAXADDR_32BIT,
  359                      BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES * NV_MAX_FRAGS,
  360                                    NV_MAX_FRAGS, MCLBYTES, 0,
  361                                    busdma_lock_mutex, &Giant,
  362                                    &sc->mtag);
  363         if (error) {
  364                 device_printf(dev, "couldn't allocate dma tag\n");
  365                 goto fail;
  366         }
  367         error = bus_dma_tag_create(NULL, 4, 0, BUS_SPACE_MAXADDR_32BIT,
  368             BUS_SPACE_MAXADDR, NULL, NULL,
  369             sizeof(struct nve_rx_desc) * RX_RING_SIZE, 1,
  370             sizeof(struct nve_rx_desc) * RX_RING_SIZE, 0,
  371             busdma_lock_mutex, &Giant,
  372             &sc->rtag);
  373         if (error) {
  374                 device_printf(dev, "couldn't allocate dma tag\n");
  375                 goto fail;
  376         }
  377         error = bus_dma_tag_create(NULL, 4, 0, BUS_SPACE_MAXADDR_32BIT,
  378             BUS_SPACE_MAXADDR, NULL, NULL,
  379             sizeof(struct nve_tx_desc) * TX_RING_SIZE, 1,
  380             sizeof(struct nve_tx_desc) * TX_RING_SIZE, 0,
  381             busdma_lock_mutex, &Giant,
  382             &sc->ttag);
  383         if (error) {
  384                 device_printf(dev, "couldn't allocate dma tag\n");
  385                 goto fail;
  386         }
  387         /* Allocate DMA safe memory and get the DMA addresses. */
  388         error = bus_dmamem_alloc(sc->ttag, (void **)&sc->tx_desc,
  389             BUS_DMA_WAITOK, &sc->tmap);
  390         if (error) {
  391                 device_printf(dev, "couldn't allocate dma memory\n");
  392                 goto fail;
  393         }
  394         bzero(sc->tx_desc, sizeof(struct nve_tx_desc) * TX_RING_SIZE);
  395         error = bus_dmamap_load(sc->ttag, sc->tmap, sc->tx_desc,
  396                     sizeof(struct nve_tx_desc) * TX_RING_SIZE, nve_dmamap_cb,
  397                     &sc->tx_addr, 0);
  398         if (error) {
  399                 device_printf(dev, "couldn't map dma memory\n");
  400                 goto fail;
  401         }
  402         error = bus_dmamem_alloc(sc->rtag, (void **)&sc->rx_desc,
  403             BUS_DMA_WAITOK, &sc->rmap);
  404         if (error) {
  405                 device_printf(dev, "couldn't allocate dma memory\n");
  406                 goto fail;
  407         }
  408         bzero(sc->rx_desc, sizeof(struct nve_rx_desc) * RX_RING_SIZE);
  409         error = bus_dmamap_load(sc->rtag, sc->rmap, sc->rx_desc,
  410             sizeof(struct nve_rx_desc) * RX_RING_SIZE, nve_dmamap_cb,
  411             &sc->rx_addr, 0);
  412         if (error) {
  413                 device_printf(dev, "couldn't map dma memory\n");
  414                 goto fail;
  415         }
  416         /* Initialize rings. */
  417         if (nve_init_rings(sc)) {
  418                 device_printf(dev, "failed to init rings\n");
  419                 error = ENXIO;
  420                 goto fail;
  421         }
  422         /* Setup NVIDIA API callback routines */
  423         osapi                           = &sc->osapi;
  424         osapi->pOSCX                    = sc;
  425         osapi->pfnAllocMemory           = nve_osalloc;
  426         osapi->pfnFreeMemory            = nve_osfree;
  427         osapi->pfnAllocMemoryEx         = nve_osallocex;
  428         osapi->pfnFreeMemoryEx          = nve_osfreeex;
  429         osapi->pfnClearMemory           = nve_osclear;
  430         osapi->pfnStallExecution        = nve_osdelay;
  431         osapi->pfnAllocReceiveBuffer    = nve_osallocrxbuf;
  432         osapi->pfnFreeReceiveBuffer     = nve_osfreerxbuf;
  433         osapi->pfnPacketWasSent         = nve_ospackettx;
  434         osapi->pfnPacketWasReceived     = nve_ospacketrx;
  435         osapi->pfnLinkStateHasChanged   = nve_oslinkchg;
  436         osapi->pfnAllocTimer            = nve_osalloctimer;
  437         osapi->pfnFreeTimer             = nve_osfreetimer;
  438         osapi->pfnInitializeTimer       = nve_osinittimer;
  439         osapi->pfnSetTimer              = nve_ossettimer;
  440         osapi->pfnCancelTimer           = nve_oscanceltimer;
  441         osapi->pfnPreprocessPacket      = nve_ospreprocpkt;
  442         osapi->pfnPreprocessPacketNopq  = nve_ospreprocpktnopq;
  443         osapi->pfnIndicatePackets       = nve_osindicatepkt;
  444         osapi->pfnLockAlloc             = nve_oslockalloc;
  445         osapi->pfnLockAcquire           = nve_oslockacquire;
  446         osapi->pfnLockRelease           = nve_oslockrelease;
  447         osapi->pfnReturnBufferVirtual   = nve_osreturnbufvirt;
  448 
  449         sc->linkup = FALSE;
  450         sc->max_frame_size = ETHERMTU + ETHER_HDR_LEN + FCS_LEN;
  451 
  452         /* TODO - We don't support hardware offload yet */
  453         sc->hwmode = 1;
  454         sc->media = 0;
  455 
  456         /* Set NVIDIA API startup parameters */
  457         OpenParams.MaxDpcLoop = 2;
  458         OpenParams.MaxRxPkt = RX_RING_SIZE;
  459         OpenParams.MaxTxPkt = TX_RING_SIZE;
  460         OpenParams.SentPacketStatusSuccess = 1;
  461         OpenParams.SentPacketStatusFailure = 0;
  462         OpenParams.MaxRxPktToAccumulate = 6;
  463         OpenParams.ulPollInterval = nve_pollinterval;
  464         OpenParams.SetForcedModeEveryNthRxPacket = 0;
  465         OpenParams.SetForcedModeEveryNthTxPacket = 0;
  466         OpenParams.RxForcedInterrupt = 0;
  467         OpenParams.TxForcedInterrupt = 0;
  468         OpenParams.pOSApi = osapi;
  469         OpenParams.pvHardwareBaseAddress = rman_get_virtual(sc->res);
  470         OpenParams.bASFEnabled = 0;
  471         OpenParams.ulDescriptorVersion = sc->hwmode;
  472         OpenParams.ulMaxPacketSize = sc->max_frame_size;
  473         OpenParams.DeviceId = pci_get_device(dev);
  474 
  475         /* Open NVIDIA Hardware API */
  476         error = ADAPTER_Open(&OpenParams, (void **)&(sc->hwapi), &sc->phyaddr);
  477         if (error) {
  478                 device_printf(dev,
  479                     "failed to open NVIDIA Hardware API: 0x%x\n", error);
  480                 goto fail;
  481         }
  482         
  483         /* TODO - Add support for MODE2 hardware offload */ 
  484         
  485         bzero(&sc->adapterdata, sizeof(sc->adapterdata));
  486         
  487         sc->adapterdata.ulMediaIF = sc->media;
  488         sc->adapterdata.ulModeRegTxReadCompleteEnable = 1;
  489         sc->hwapi->pfnSetCommonData(sc->hwapi->pADCX, &sc->adapterdata);
  490         
  491         /* MAC is loaded backwards into h/w reg */
  492         sc->hwapi->pfnGetNodeAddress(sc->hwapi->pADCX, sc->original_mac_addr);
  493         for (i = 0; i < 6; i++) {
  494                 eaddr[i] = sc->original_mac_addr[5 - i];
  495         }
  496         sc->hwapi->pfnSetNodeAddress(sc->hwapi->pADCX, eaddr);
  497 
  498         /* Display ethernet address ,... */
  499         device_printf(dev, "Ethernet address %6D\n", eaddr, ":");
  500 
  501         /* Allocate interface structures */
  502         ifp = sc->ifp = if_alloc(IFT_ETHER);
  503         if (ifp == NULL) {
  504                 device_printf(dev, "can not if_alloc()\n");
  505                 error = ENOSPC;
  506                 goto fail;
  507         }
  508 
  509         /* Probe device for MII interface to PHY */
  510         DEBUGOUT(NVE_DEBUG_INIT, "nve: do mii_phy_probe\n");
  511         if (mii_phy_probe(dev, &sc->miibus, nve_ifmedia_upd, nve_ifmedia_sts)) {
  512                 device_printf(dev, "MII without any phy!\n");
  513                 error = ENXIO;
  514                 goto fail;
  515         }
  516 
  517         /* Setup interface parameters */
  518         ifp->if_softc = sc;
  519         if_initname(ifp, device_get_name(dev), device_get_unit(dev));
  520         ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
  521         ifp->if_ioctl = nve_ioctl;
  522         ifp->if_output = ether_output;
  523         ifp->if_start = nve_ifstart;
  524         ifp->if_watchdog = nve_watchdog;
  525         ifp->if_timer = 0;
  526         ifp->if_init = nve_init;
  527         ifp->if_mtu = ETHERMTU;
  528         ifp->if_baudrate = IF_Mbps(100);
  529         IFQ_SET_MAXLEN(&ifp->if_snd, TX_RING_SIZE - 1);
  530         ifp->if_snd.ifq_drv_maxlen = TX_RING_SIZE - 1;
  531         IFQ_SET_READY(&ifp->if_snd);
  532         ifp->if_capabilities |= IFCAP_VLAN_MTU;
  533         ifp->if_capenable |= IFCAP_VLAN_MTU;
  534 
  535         /* Attach to OS's managers. */
  536         ether_ifattach(ifp, eaddr);
  537 
  538         /* Activate our interrupt handler. - attach last to avoid lock */
  539         error = bus_setup_intr(sc->dev, sc->irq, INTR_TYPE_NET | INTR_MPSAFE,
  540             NULL, nve_intr, sc, &sc->sc_ih);
  541         if (error) {
  542                 device_printf(sc->dev, "couldn't set up interrupt handler\n");
  543                 goto fail;
  544         }
  545         DEBUGOUT(NVE_DEBUG_INIT, "nve: nve_attach - exit\n");
  546 
  547 fail:
  548         if (error)
  549                 nve_detach(dev);
  550 
  551         return (error);
  552 }
  553 
  554 /* Detach interface for module unload */
  555 static int
  556 nve_detach(device_t dev)
  557 {
  558         struct nve_softc *sc = device_get_softc(dev);
  559         struct ifnet *ifp;
  560 
  561         KASSERT(mtx_initialized(&sc->mtx), ("mutex not initialized"));
  562 
  563         DEBUGOUT(NVE_DEBUG_DEINIT, "nve: nve_detach - entry\n");
  564 
  565         ifp = sc->ifp;
  566 
  567         if (device_is_attached(dev)) {
  568                 NVE_LOCK(sc);
  569                 nve_stop(sc);
  570                 NVE_UNLOCK(sc);
  571                 callout_drain(&sc->stat_callout);
  572                 ether_ifdetach(ifp);
  573         }
  574 
  575         if (sc->miibus)
  576                 device_delete_child(dev, sc->miibus);
  577         bus_generic_detach(dev);
  578 
  579         /* Reload unreversed address back into MAC in original state */
  580         if (sc->original_mac_addr)
  581                 sc->hwapi->pfnSetNodeAddress(sc->hwapi->pADCX,
  582                     sc->original_mac_addr);
  583 
  584         DEBUGOUT(NVE_DEBUG_DEINIT, "nve: do pfnClose\n");
  585         /* Detach from NVIDIA hardware API */
  586         if (sc->hwapi->pfnClose)
  587                 sc->hwapi->pfnClose(sc->hwapi->pADCX, FALSE);
  588         /* Release resources */
  589         if (sc->sc_ih)
  590                 bus_teardown_intr(sc->dev, sc->irq, sc->sc_ih);
  591         if (sc->irq)
  592                 bus_release_resource(sc->dev, SYS_RES_IRQ, 0, sc->irq);
  593         if (sc->res)
  594                 bus_release_resource(sc->dev, SYS_RES_MEMORY, NV_RID, sc->res);
  595 
  596         nve_free_rings(sc);
  597 
  598         if (sc->tx_desc) {
  599                 bus_dmamap_unload(sc->rtag, sc->rmap);
  600                 bus_dmamem_free(sc->rtag, sc->rx_desc, sc->rmap);
  601                 bus_dmamap_destroy(sc->rtag, sc->rmap);
  602         }
  603         if (sc->mtag)
  604                 bus_dma_tag_destroy(sc->mtag);
  605         if (sc->ttag)
  606                 bus_dma_tag_destroy(sc->ttag);
  607         if (sc->rtag)
  608                 bus_dma_tag_destroy(sc->rtag);
  609 
  610         if (ifp)
  611                 if_free(ifp);
  612         mtx_destroy(&sc->mtx);
  613 
  614         DEBUGOUT(NVE_DEBUG_DEINIT, "nve: nve_detach - exit\n");
  615 
  616         return (0);
  617 }
  618 
  619 /* Initialise interface and start it "RUNNING" */
  620 static void
  621 nve_init(void *xsc)
  622 {
  623         struct nve_softc *sc = xsc;
  624 
  625         NVE_LOCK(sc);
  626         nve_init_locked(sc);
  627         NVE_UNLOCK(sc);
  628 }
  629 
  630 static void
  631 nve_init_locked(struct nve_softc *sc)
  632 {
  633         struct ifnet *ifp;
  634         int error;
  635 
  636         NVE_LOCK_ASSERT(sc);
  637         DEBUGOUT(NVE_DEBUG_INIT, "nve: nve_init - entry (%d)\n", sc->linkup);
  638 
  639         ifp = sc->ifp;
  640 
  641         /* Do nothing if already running */
  642         if (ifp->if_drv_flags & IFF_DRV_RUNNING)
  643                 return;
  644 
  645         nve_stop(sc);
  646         DEBUGOUT(NVE_DEBUG_INIT, "nve: do pfnInit\n");
  647 
  648         nve_ifmedia_upd_locked(ifp);
  649 
  650         /* Setup Hardware interface and allocate memory structures */
  651         error = sc->hwapi->pfnInit(sc->hwapi->pADCX, 
  652             0, /* force speed */ 
  653             0, /* force full duplex */
  654             0, /* force mode */
  655             0, /* force async mode */
  656             &sc->linkup);
  657 
  658         if (error) {
  659                 device_printf(sc->dev,
  660                     "failed to start NVIDIA Hardware interface\n");
  661                 return;
  662         }
  663         /* Set the MAC address */
  664         sc->hwapi->pfnSetNodeAddress(sc->hwapi->pADCX, IF_LLADDR(sc->ifp));
  665         sc->hwapi->pfnEnableInterrupts(sc->hwapi->pADCX);
  666         sc->hwapi->pfnStart(sc->hwapi->pADCX);
  667 
  668         /* Setup multicast filter */
  669         nve_setmulti(sc);
  670 
  671         /* Update interface parameters */
  672         ifp->if_drv_flags |= IFF_DRV_RUNNING;
  673         ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
  674 
  675         callout_reset(&sc->stat_callout, hz, nve_tick, sc);
  676 
  677         DEBUGOUT(NVE_DEBUG_INIT, "nve: nve_init - exit\n");
  678 
  679         return;
  680 }
  681 
  682 /* Stop interface activity ie. not "RUNNING" */
  683 static void
  684 nve_stop(struct nve_softc *sc)
  685 {
  686         struct ifnet *ifp;
  687 
  688         NVE_LOCK_ASSERT(sc);
  689 
  690         DEBUGOUT(NVE_DEBUG_RUNNING, "nve: nve_stop - entry\n");
  691 
  692         ifp = sc->ifp;
  693         ifp->if_timer = 0;
  694 
  695         /* Cancel tick timer */
  696         callout_stop(&sc->stat_callout);
  697 
  698         /* Stop hardware activity */
  699         sc->hwapi->pfnDisableInterrupts(sc->hwapi->pADCX);
  700         sc->hwapi->pfnStop(sc->hwapi->pADCX, 0);
  701 
  702         DEBUGOUT(NVE_DEBUG_DEINIT, "nve: do pfnDeinit\n");
  703         /* Shutdown interface and deallocate memory buffers */
  704         if (sc->hwapi->pfnDeinit)
  705                 sc->hwapi->pfnDeinit(sc->hwapi->pADCX, 0);
  706 
  707         sc->linkup = 0;
  708         sc->cur_rx = 0;
  709         sc->pending_rxs = 0;
  710         sc->pending_txs = 0;
  711 
  712         ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
  713 
  714         DEBUGOUT(NVE_DEBUG_RUNNING, "nve: nve_stop - exit\n");
  715 
  716         return;
  717 }
  718 
  719 /* Shutdown interface for unload/reboot */
  720 static int
  721 nve_shutdown(device_t dev)
  722 {
  723         struct nve_softc *sc;
  724 
  725         DEBUGOUT(NVE_DEBUG_DEINIT, "nve: nve_shutdown\n");
  726 
  727         sc = device_get_softc(dev);
  728 
  729         /* Stop hardware activity */
  730         NVE_LOCK(sc);
  731         nve_stop(sc);
  732         NVE_UNLOCK(sc);
  733 
  734         return (0);
  735 }
  736 
  737 /* Allocate TX ring buffers */
  738 static int
  739 nve_init_rings(struct nve_softc *sc)
  740 {
  741         int error, i;
  742 
  743         DEBUGOUT(NVE_DEBUG_INIT, "nve: nve_init_rings - entry\n");
  744 
  745         sc->cur_rx = sc->cur_tx = sc->pending_rxs = sc->pending_txs = 0;
  746         /* Initialise RX ring */
  747         for (i = 0; i < RX_RING_SIZE; i++) {
  748                 struct nve_rx_desc *desc = sc->rx_desc + i;
  749                 struct nve_map_buffer *buf = &desc->buf;
  750 
  751                 buf->mbuf = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR);
  752                 if (buf->mbuf == NULL) {
  753                         device_printf(sc->dev, "couldn't allocate mbuf\n");
  754                         nve_free_rings(sc);
  755                         return (ENOBUFS);
  756                 }
  757                 buf->mbuf->m_len = buf->mbuf->m_pkthdr.len = MCLBYTES;
  758                 m_adj(buf->mbuf, ETHER_ALIGN);
  759 
  760                 error = bus_dmamap_create(sc->mtag, 0, &buf->map);
  761                 if (error) {
  762                         device_printf(sc->dev, "couldn't create dma map\n");
  763                         nve_free_rings(sc);
  764                         return (error);
  765                 }
  766                 error = bus_dmamap_load_mbuf(sc->mtag, buf->map, buf->mbuf,
  767                                           nve_dmamap_rx_cb, &desc->paddr, 0);
  768                 if (error) {
  769                         device_printf(sc->dev, "couldn't dma map mbuf\n");
  770                         nve_free_rings(sc);
  771                         return (error);
  772                 }
  773                 bus_dmamap_sync(sc->mtag, buf->map, BUS_DMASYNC_PREREAD);
  774 
  775                 desc->buflength = buf->mbuf->m_len;
  776                 desc->vaddr = mtod(buf->mbuf, caddr_t);
  777         }
  778         bus_dmamap_sync(sc->rtag, sc->rmap,
  779             BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
  780 
  781         /* Initialize TX ring */
  782         for (i = 0; i < TX_RING_SIZE; i++) {
  783                 struct nve_tx_desc *desc = sc->tx_desc + i;
  784                 struct nve_map_buffer *buf = &desc->buf;
  785 
  786                 buf->mbuf = NULL;
  787 
  788                 error = bus_dmamap_create(sc->mtag, 0, &buf->map);
  789                 if (error) {
  790                         device_printf(sc->dev, "couldn't create dma map\n");
  791                         nve_free_rings(sc);
  792                         return (error);
  793                 }
  794         }
  795         bus_dmamap_sync(sc->ttag, sc->tmap,
  796             BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
  797 
  798         DEBUGOUT(NVE_DEBUG_INIT, "nve: nve_init_rings - exit\n");
  799 
  800         return (error);
  801 }
  802 
  803 /* Free the TX ring buffers */
  804 static void
  805 nve_free_rings(struct nve_softc *sc)
  806 {
  807         int i;
  808 
  809         DEBUGOUT(NVE_DEBUG_DEINIT, "nve: nve_free_rings - entry\n");
  810 
  811         for (i = 0; i < RX_RING_SIZE; i++) {
  812                 struct nve_rx_desc *desc = sc->rx_desc + i;
  813                 struct nve_map_buffer *buf = &desc->buf;
  814 
  815                 if (buf->mbuf) {
  816                         bus_dmamap_unload(sc->mtag, buf->map);
  817                         bus_dmamap_destroy(sc->mtag, buf->map);
  818                         m_freem(buf->mbuf);
  819                 }
  820                 buf->mbuf = NULL;
  821         }
  822 
  823         for (i = 0; i < TX_RING_SIZE; i++) {
  824                 struct nve_tx_desc *desc = sc->tx_desc + i;
  825                 struct nve_map_buffer *buf = &desc->buf;
  826 
  827                 if (buf->mbuf) {
  828                         bus_dmamap_unload(sc->mtag, buf->map);
  829                         bus_dmamap_destroy(sc->mtag, buf->map);
  830                         m_freem(buf->mbuf);
  831                 }
  832                 buf->mbuf = NULL;
  833         }
  834 
  835         DEBUGOUT(NVE_DEBUG_DEINIT, "nve: nve_free_rings - exit\n");
  836 }
  837 
  838 /* Main loop for sending packets from OS to interface */
  839 static void
  840 nve_ifstart(struct ifnet *ifp)
  841 {
  842         struct nve_softc *sc = ifp->if_softc;
  843 
  844         NVE_LOCK(sc);
  845         nve_ifstart_locked(ifp);
  846         NVE_UNLOCK(sc);
  847 }
  848 
  849 static void
  850 nve_ifstart_locked(struct ifnet *ifp)
  851 {
  852         struct nve_softc *sc = ifp->if_softc;
  853         struct nve_map_buffer *buf;
  854         struct mbuf    *m0, *m;
  855         struct nve_tx_desc *desc;
  856         ADAPTER_WRITE_DATA txdata;
  857         int error, i;
  858 
  859         DEBUGOUT(NVE_DEBUG_RUNNING, "nve: nve_ifstart - entry\n");
  860 
  861         NVE_LOCK_ASSERT(sc);
  862 
  863         /* If link is down/busy or queue is empty do nothing */
  864         if (ifp->if_drv_flags & IFF_DRV_OACTIVE ||
  865             IFQ_DRV_IS_EMPTY(&ifp->if_snd))
  866                 return;
  867 
  868         /* Transmit queued packets until sent or TX ring is full */
  869         while (sc->pending_txs < TX_RING_SIZE) {
  870                 desc = sc->tx_desc + sc->cur_tx;
  871                 buf = &desc->buf;
  872 
  873                 /* Get next packet to send. */
  874                 IFQ_DRV_DEQUEUE(&ifp->if_snd, m0);
  875 
  876                 /* If nothing to send, return. */
  877                 if (m0 == NULL)
  878                         return;
  879 
  880                 /*
  881                  * On nForce4, the chip doesn't interrupt on transmit,
  882                  * so try to flush transmitted packets from the queue
  883                  * if it's getting large (see note in nve_watchdog).
  884                  */
  885                 if (sc->pending_txs > TX_RING_SIZE/2) {
  886                         sc->hwapi->pfnDisableInterrupts(sc->hwapi->pADCX);
  887                         sc->hwapi->pfnHandleInterrupt(sc->hwapi->pADCX);
  888                         sc->hwapi->pfnEnableInterrupts(sc->hwapi->pADCX);
  889                 }
  890 
  891                 /* Map MBUF for DMA access */
  892                 error = bus_dmamap_load_mbuf(sc->mtag, buf->map, m0,
  893                     nve_dmamap_tx_cb, desc, BUS_DMA_NOWAIT);
  894 
  895                 if (error && error != EFBIG) {
  896                         m_freem(m0);
  897                         sc->tx_errors++;
  898                         continue;
  899                 }
  900                 /*
  901                  * Packet has too many fragments - defrag into new mbuf
  902                  * cluster
  903                  */
  904                 if (error) {
  905                         m = m_defrag(m0, M_DONTWAIT);
  906                         if (m == NULL) {
  907                                 m_freem(m0);
  908                                 sc->tx_errors++;
  909                                 continue;
  910                         }
  911                         m0 = m;
  912 
  913                         error = bus_dmamap_load_mbuf(sc->mtag, buf->map, m,
  914                             nve_dmamap_tx_cb, desc, BUS_DMA_NOWAIT);
  915                         if (error) {
  916                                 m_freem(m);
  917                                 sc->tx_errors++;
  918                                 continue;
  919                         }
  920                 }
  921                 /* Do sync on DMA bounce buffer */
  922                 bus_dmamap_sync(sc->mtag, buf->map, BUS_DMASYNC_PREWRITE);
  923 
  924                 buf->mbuf = m0;
  925                 txdata.ulNumberOfElements = desc->numfrags;
  926                 txdata.pvID = (PVOID)desc;
  927 
  928                 /* Put fragments into API element list */
  929                 txdata.ulTotalLength = buf->mbuf->m_len;
  930                 for (i = 0; i < desc->numfrags; i++) {
  931                         txdata.sElement[i].ulLength =
  932                             (ulong)desc->frags[i].ds_len;
  933                         txdata.sElement[i].pPhysical =
  934                             (PVOID)desc->frags[i].ds_addr;
  935                 }
  936 
  937                 /* Send packet to Nvidia API for transmission */
  938                 error = sc->hwapi->pfnWrite(sc->hwapi->pADCX, &txdata);
  939 
  940                 switch (error) {
  941                 case ADAPTERERR_NONE:
  942                         /* Packet was queued in API TX queue successfully */
  943                         sc->pending_txs++;
  944                         sc->cur_tx = (sc->cur_tx + 1) % TX_RING_SIZE;
  945                         break;
  946 
  947                 case ADAPTERERR_TRANSMIT_QUEUE_FULL:
  948                         /* The API TX queue is full - requeue the packet */
  949                         device_printf(sc->dev,
  950                             "nve_ifstart: transmit queue is full\n");
  951                         ifp->if_drv_flags |= IFF_DRV_OACTIVE;
  952                         bus_dmamap_unload(sc->mtag, buf->map);
  953                         IFQ_DRV_PREPEND(&ifp->if_snd, buf->mbuf);
  954                         buf->mbuf = NULL;
  955                         return;
  956 
  957                 default:
  958                         /* The API failed to queue/send the packet so dump it */
  959                         device_printf(sc->dev, "nve_ifstart: transmit error\n");
  960                         bus_dmamap_unload(sc->mtag, buf->map);
  961                         m_freem(buf->mbuf);
  962                         buf->mbuf = NULL;
  963                         sc->tx_errors++;
  964                         return;
  965                 }
  966                 /* Set watchdog timer. */
  967                 ifp->if_timer = 8;
  968 
  969                 /* Copy packet to BPF tap */
  970                 BPF_MTAP(ifp, m0);
  971         }
  972         ifp->if_drv_flags |= IFF_DRV_OACTIVE;
  973 
  974         DEBUGOUT(NVE_DEBUG_RUNNING, "nve: nve_ifstart - exit\n");
  975 }
  976 
  977 /* Handle IOCTL events */
  978 static int
  979 nve_ioctl(struct ifnet *ifp, u_long command, caddr_t data)
  980 {
  981         struct nve_softc *sc = ifp->if_softc;
  982         struct ifreq *ifr = (struct ifreq *) data;
  983         struct mii_data *mii;
  984         int error = 0;
  985 
  986         DEBUGOUT(NVE_DEBUG_IOCTL, "nve: nve_ioctl - entry\n");
  987 
  988         switch (command) {
  989         case SIOCSIFMTU:
  990                 /* Set MTU size */
  991                 NVE_LOCK(sc);
  992                 if (ifp->if_mtu == ifr->ifr_mtu) {
  993                         NVE_UNLOCK(sc);
  994                         break;
  995                 }
  996                 if (ifr->ifr_mtu + ifp->if_hdrlen <= MAX_PACKET_SIZE_1518) {
  997                         ifp->if_mtu = ifr->ifr_mtu;
  998                         nve_stop(sc);
  999                         nve_init_locked(sc);
 1000                 } else
 1001                         error = EINVAL;
 1002                 NVE_UNLOCK(sc);
 1003                 break;
 1004 
 1005         case SIOCSIFFLAGS:
 1006                 /* Setup interface flags */
 1007                 NVE_LOCK(sc);
 1008                 if (ifp->if_flags & IFF_UP) {
 1009                         if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) {
 1010                                 nve_init_locked(sc);
 1011                                 NVE_UNLOCK(sc);
 1012                                 break;
 1013                         }
 1014                 } else {
 1015                         if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
 1016                                 nve_stop(sc);
 1017                                 NVE_UNLOCK(sc);
 1018                                 break;
 1019                         }
 1020                 }
 1021                 /* Handle IFF_PROMISC and IFF_ALLMULTI flags. */
 1022                 nve_setmulti(sc);
 1023                 NVE_UNLOCK(sc);
 1024                 break;
 1025 
 1026         case SIOCADDMULTI:
 1027         case SIOCDELMULTI:
 1028                 /* Setup multicast filter */
 1029                 NVE_LOCK(sc);
 1030                 if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
 1031                         nve_setmulti(sc);
 1032                 }
 1033                 NVE_UNLOCK(sc);
 1034                 break;
 1035 
 1036         case SIOCGIFMEDIA:
 1037         case SIOCSIFMEDIA:
 1038                 /* Get/Set interface media parameters */
 1039                 mii = device_get_softc(sc->miibus);
 1040                 error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, command);
 1041                 break;
 1042 
 1043         default:
 1044                 /* Everything else we forward to generic ether ioctl */
 1045                 error = ether_ioctl(ifp, command, data);
 1046                 break;
 1047         }
 1048 
 1049         DEBUGOUT(NVE_DEBUG_IOCTL, "nve: nve_ioctl - exit\n");
 1050 
 1051         return (error);
 1052 }
 1053 
 1054 /* Interrupt service routine */
 1055 static void
 1056 nve_intr(void *arg)
 1057 {
 1058         struct nve_softc *sc = arg;
 1059         struct ifnet *ifp = sc->ifp;
 1060 
 1061         DEBUGOUT(NVE_DEBUG_INTERRUPT, "nve: nve_intr - entry\n");
 1062 
 1063         NVE_LOCK(sc);
 1064         if (!ifp->if_flags & IFF_UP) {
 1065                 nve_stop(sc);
 1066                 NVE_UNLOCK(sc);
 1067                 return;
 1068         }
 1069         /* Handle interrupt event */
 1070         if (sc->hwapi->pfnQueryInterrupt(sc->hwapi->pADCX)) {
 1071                 sc->hwapi->pfnHandleInterrupt(sc->hwapi->pADCX);
 1072                 sc->hwapi->pfnEnableInterrupts(sc->hwapi->pADCX);
 1073         }
 1074         if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd))
 1075                 nve_ifstart_locked(ifp);
 1076 
 1077         /* If no pending packets we don't need a timeout */
 1078         if (sc->pending_txs == 0)
 1079                 sc->ifp->if_timer = 0;
 1080         NVE_UNLOCK(sc);
 1081 
 1082         DEBUGOUT(NVE_DEBUG_INTERRUPT, "nve: nve_intr - exit\n");
 1083 
 1084         return;
 1085 }
 1086 
 1087 /* Setup multicast filters */
 1088 static void
 1089 nve_setmulti(struct nve_softc *sc)
 1090 {
 1091         struct ifnet *ifp;
 1092         struct ifmultiaddr *ifma;
 1093         PACKET_FILTER hwfilter;
 1094         int i;
 1095         u_int8_t andaddr[6], oraddr[6];
 1096 
 1097         NVE_LOCK_ASSERT(sc);
 1098 
 1099         DEBUGOUT(NVE_DEBUG_RUNNING, "nve: nve_setmulti - entry\n");
 1100 
 1101         ifp = sc->ifp;
 1102 
 1103         /* Initialize filter */
 1104         hwfilter.ulFilterFlags = 0;
 1105         for (i = 0; i < 6; i++) {
 1106                 hwfilter.acMulticastAddress[i] = 0;
 1107                 hwfilter.acMulticastMask[i] = 0;
 1108         }
 1109 
 1110         if (ifp->if_flags & (IFF_PROMISC | IFF_ALLMULTI)) {
 1111                 /* Accept all packets */
 1112                 hwfilter.ulFilterFlags |= ACCEPT_ALL_PACKETS;
 1113                 sc->hwapi->pfnSetPacketFilter(sc->hwapi->pADCX, &hwfilter);
 1114                 return;
 1115         }
 1116         /* Setup multicast filter */
 1117         IF_ADDR_LOCK(ifp);
 1118         TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
 1119                 u_char *addrp;
 1120 
 1121                 if (ifma->ifma_addr->sa_family != AF_LINK)
 1122                         continue;
 1123 
 1124                 addrp = LLADDR((struct sockaddr_dl *) ifma->ifma_addr);
 1125                 for (i = 0; i < 6; i++) {
 1126                         u_int8_t mcaddr = addrp[i];
 1127                         andaddr[i] &= mcaddr;
 1128                         oraddr[i] |= mcaddr;
 1129                 }
 1130         }
 1131         IF_ADDR_UNLOCK(ifp);
 1132         for (i = 0; i < 6; i++) {
 1133                 hwfilter.acMulticastAddress[i] = andaddr[i] & oraddr[i];
 1134                 hwfilter.acMulticastMask[i] = andaddr[i] | (~oraddr[i]);
 1135         }
 1136 
 1137         /* Send filter to NVIDIA API */
 1138         sc->hwapi->pfnSetPacketFilter(sc->hwapi->pADCX, &hwfilter);
 1139 
 1140         DEBUGOUT(NVE_DEBUG_RUNNING, "nve: nve_setmulti - exit\n");
 1141 
 1142         return;
 1143 }
 1144 
 1145 /* Change the current media/mediaopts */
 1146 static int
 1147 nve_ifmedia_upd(struct ifnet *ifp)
 1148 {
 1149         struct nve_softc *sc = ifp->if_softc;
 1150 
 1151         NVE_LOCK(sc);
 1152         nve_ifmedia_upd_locked(ifp);
 1153         NVE_UNLOCK(sc);
 1154         return (0);
 1155 }
 1156 
 1157 static void
 1158 nve_ifmedia_upd_locked(struct ifnet *ifp)
 1159 {
 1160         struct nve_softc *sc = ifp->if_softc;
 1161         struct mii_data *mii;
 1162 
 1163         DEBUGOUT(NVE_DEBUG_MII, "nve: nve_ifmedia_upd\n");
 1164 
 1165         NVE_LOCK_ASSERT(sc);
 1166         mii = device_get_softc(sc->miibus);
 1167 
 1168         if (mii->mii_instance) {
 1169                 struct mii_softc *miisc;
 1170                 for (miisc = LIST_FIRST(&mii->mii_phys); miisc != NULL;
 1171                     miisc = LIST_NEXT(miisc, mii_list)) {
 1172                         mii_phy_reset(miisc);
 1173                 }
 1174         }
 1175         mii_mediachg(mii);
 1176 }
 1177 
 1178 /* Update current miibus PHY status of media */
 1179 static void
 1180 nve_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr)
 1181 {
 1182         struct nve_softc *sc;
 1183         struct mii_data *mii;
 1184 
 1185         DEBUGOUT(NVE_DEBUG_MII, "nve: nve_ifmedia_sts\n");
 1186 
 1187         sc = ifp->if_softc;
 1188         NVE_LOCK(sc);
 1189         mii = device_get_softc(sc->miibus);
 1190         mii_pollstat(mii);
 1191         NVE_UNLOCK(sc);
 1192 
 1193         ifmr->ifm_active = mii->mii_media_active;
 1194         ifmr->ifm_status = mii->mii_media_status;
 1195 
 1196         return;
 1197 }
 1198 
 1199 /* miibus tick timer - maintain link status */
 1200 static void
 1201 nve_tick(void *xsc)
 1202 {
 1203         struct nve_softc *sc = xsc;
 1204         struct mii_data *mii;
 1205         struct ifnet *ifp;
 1206 
 1207         NVE_LOCK_ASSERT(sc);
 1208 
 1209         ifp = sc->ifp;
 1210         nve_update_stats(sc);
 1211 
 1212         mii = device_get_softc(sc->miibus);
 1213         mii_tick(mii);
 1214 
 1215         if (mii->mii_media_status & IFM_ACTIVE &&
 1216             IFM_SUBTYPE(mii->mii_media_active) != IFM_NONE) {
 1217                 if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd))
 1218                         nve_ifstart_locked(ifp);
 1219         }
 1220         callout_reset(&sc->stat_callout, hz, nve_tick, sc);
 1221 
 1222         return;
 1223 }
 1224 
 1225 /* Update ifnet data structure with collected interface stats from API */
 1226 static void
 1227 nve_update_stats(struct nve_softc *sc)
 1228 {
 1229         struct ifnet *ifp = sc->ifp;
 1230         ADAPTER_STATS stats;
 1231 
 1232         NVE_LOCK_ASSERT(sc);
 1233 
 1234         if (sc->hwapi) {
 1235                 sc->hwapi->pfnGetStatistics(sc->hwapi->pADCX, &stats);
 1236 
 1237                 ifp->if_ipackets = stats.ulSuccessfulReceptions;
 1238                 ifp->if_ierrors = stats.ulMissedFrames +
 1239                         stats.ulFailedReceptions +
 1240                         stats.ulCRCErrors +
 1241                         stats.ulFramingErrors +
 1242                         stats.ulOverFlowErrors;
 1243 
 1244                 ifp->if_opackets = stats.ulSuccessfulTransmissions;
 1245                 ifp->if_oerrors = sc->tx_errors +
 1246                         stats.ulFailedTransmissions +
 1247                         stats.ulRetryErrors +
 1248                         stats.ulUnderflowErrors +
 1249                         stats.ulLossOfCarrierErrors +
 1250                         stats.ulLateCollisionErrors;
 1251 
 1252                 ifp->if_collisions = stats.ulLateCollisionErrors;
 1253         }
 1254 
 1255         return;
 1256 }
 1257 
 1258 /* miibus Read PHY register wrapper - calls Nvidia API entry point */
 1259 static int
 1260 nve_miibus_readreg(device_t dev, int phy, int reg)
 1261 {
 1262         struct nve_softc *sc = device_get_softc(dev);
 1263         ULONG data;
 1264 
 1265         DEBUGOUT(NVE_DEBUG_MII, "nve: nve_miibus_readreg - entry\n");
 1266 
 1267         ADAPTER_ReadPhy(sc->hwapi->pADCX, phy, reg, &data);
 1268 
 1269         DEBUGOUT(NVE_DEBUG_MII, "nve: nve_miibus_readreg - exit\n");
 1270 
 1271         return (data);
 1272 }
 1273 
 1274 /* miibus Write PHY register wrapper - calls Nvidia API entry point */
 1275 static void
 1276 nve_miibus_writereg(device_t dev, int phy, int reg, int data)
 1277 {
 1278         struct nve_softc *sc = device_get_softc(dev);
 1279 
 1280         DEBUGOUT(NVE_DEBUG_MII, "nve: nve_miibus_writereg - entry\n");
 1281 
 1282         ADAPTER_WritePhy(sc->hwapi->pADCX, phy, reg, (ulong)data);
 1283 
 1284         DEBUGOUT(NVE_DEBUG_MII, "nve: nve_miibus_writereg - exit\n");
 1285 
 1286         return;
 1287 }
 1288 
 1289 /* Watchdog timer to prevent PHY lockups */
 1290 static void
 1291 nve_watchdog(struct ifnet *ifp)
 1292 {
 1293         struct nve_softc *sc = ifp->if_softc;
 1294         int pending_txs_start;
 1295 
 1296         NVE_LOCK(sc);
 1297 
 1298         /*
 1299          * The nvidia driver blob defers tx completion notifications.
 1300          * Thus, sometimes the watchdog timer will go off when the
 1301          * tx engine is fine, but the tx completions are just deferred.
 1302          * Try kicking the driver blob to clear out any pending tx
 1303          * completions.  If that clears up any of the pending tx
 1304          * operations, then just return without printing the warning
 1305          * message or resetting the adapter, as we can then conclude
 1306          * the chip hasn't actually crashed (it's still sending packets).
 1307          */
 1308         pending_txs_start = sc->pending_txs;
 1309         sc->hwapi->pfnDisableInterrupts(sc->hwapi->pADCX);
 1310         sc->hwapi->pfnHandleInterrupt(sc->hwapi->pADCX);
 1311         sc->hwapi->pfnEnableInterrupts(sc->hwapi->pADCX);
 1312         if (sc->pending_txs < pending_txs_start) {
 1313                 NVE_UNLOCK(sc);
 1314                 return;
 1315         }
 1316 
 1317         device_printf(sc->dev, "device timeout (%d)\n", sc->pending_txs);
 1318 
 1319         sc->tx_errors++;
 1320 
 1321         nve_stop(sc);
 1322         ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
 1323         nve_init_locked(sc);
 1324 
 1325         if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd))
 1326                 nve_ifstart_locked(ifp);
 1327         NVE_UNLOCK(sc);
 1328 
 1329         return;
 1330 }
 1331 
 1332 /* --- Start of NVOSAPI interface --- */
 1333 
 1334 /* Allocate DMA enabled general use memory for API */
 1335 static NV_SINT32
 1336 nve_osalloc(PNV_VOID ctx, PMEMORY_BLOCK mem)
 1337 {
 1338         struct nve_softc *sc;
 1339         bus_addr_t mem_physical;
 1340 
 1341         DEBUGOUT(NVE_DEBUG_API, "nve: nve_osalloc - %d\n", mem->uiLength);
 1342 
 1343         sc = (struct nve_softc *)ctx;
 1344 
 1345         mem->pLogical = (PVOID)contigmalloc(mem->uiLength, M_DEVBUF,
 1346             M_NOWAIT | M_ZERO, 0, 0xffffffff, PAGE_SIZE, 0);
 1347 
 1348         if (!mem->pLogical) {
 1349                 device_printf(sc->dev, "memory allocation failed\n");
 1350                 return (0);
 1351         }
 1352         memset(mem->pLogical, 0, (ulong)mem->uiLength);
 1353         mem_physical = vtophys(mem->pLogical);
 1354         mem->pPhysical = (PVOID)mem_physical;
 1355 
 1356         DEBUGOUT(NVE_DEBUG_API, "nve: nve_osalloc 0x%x/0x%x - %d\n",
 1357             (uint)mem->pLogical, (uint)mem->pPhysical, (uint)mem->uiLength);
 1358 
 1359         return (1);
 1360 }
 1361 
 1362 /* Free allocated memory */
 1363 static NV_SINT32
 1364 nve_osfree(PNV_VOID ctx, PMEMORY_BLOCK mem)
 1365 {
 1366         DEBUGOUT(NVE_DEBUG_API, "nve: nve_osfree - 0x%x - %d\n",
 1367             (uint)mem->pLogical, (uint) mem->uiLength);
 1368 
 1369         contigfree(mem->pLogical, PAGE_SIZE, M_DEVBUF);
 1370         return (1);
 1371 }
 1372 
 1373 /* Copied directly from nvnet.c */
 1374 static NV_SINT32
 1375 nve_osallocex(PNV_VOID ctx, PMEMORY_BLOCKEX mem_block_ex)
 1376 {
 1377         MEMORY_BLOCK mem_block;
 1378 
 1379         DEBUGOUT(NVE_DEBUG_API, "nve: nve_osallocex\n");
 1380 
 1381         mem_block_ex->pLogical = NULL;
 1382         mem_block_ex->uiLengthOrig = mem_block_ex->uiLength;
 1383 
 1384         if ((mem_block_ex->AllocFlags & ALLOC_MEMORY_ALIGNED) &&
 1385             (mem_block_ex->AlignmentSize > 1)) {
 1386                 DEBUGOUT(NVE_DEBUG_API, "     aligning on %d\n",
 1387                     mem_block_ex->AlignmentSize);
 1388                 mem_block_ex->uiLengthOrig += mem_block_ex->AlignmentSize;
 1389         }
 1390         mem_block.uiLength = mem_block_ex->uiLengthOrig;
 1391 
 1392         if (nve_osalloc(ctx, &mem_block) == 0) {
 1393                 return (0);
 1394         }
 1395         mem_block_ex->pLogicalOrig = mem_block.pLogical;
 1396         mem_block_ex->pPhysicalOrigLow = (unsigned long)mem_block.pPhysical;
 1397         mem_block_ex->pPhysicalOrigHigh = 0;
 1398 
 1399         mem_block_ex->pPhysical = mem_block.pPhysical;
 1400         mem_block_ex->pLogical = mem_block.pLogical;
 1401 
 1402         if (mem_block_ex->uiLength != mem_block_ex->uiLengthOrig) {
 1403                 unsigned int offset;
 1404                 offset = mem_block_ex->pPhysicalOrigLow &
 1405                     (mem_block_ex->AlignmentSize - 1);
 1406 
 1407                 if (offset) {
 1408                         mem_block_ex->pPhysical =
 1409                             (PVOID)((ulong)mem_block_ex->pPhysical +
 1410                             mem_block_ex->AlignmentSize - offset);
 1411                         mem_block_ex->pLogical =
 1412                             (PVOID)((ulong)mem_block_ex->pLogical +
 1413                             mem_block_ex->AlignmentSize - offset);
 1414                 } /* if (offset) */
 1415         } /* if (mem_block_ex->uiLength != *mem_block_ex->uiLengthOrig) */
 1416         return (1);
 1417 }
 1418 
 1419 /* Copied directly from nvnet.c */
 1420 static NV_SINT32
 1421 nve_osfreeex(PNV_VOID ctx, PMEMORY_BLOCKEX mem_block_ex)
 1422 {
 1423         MEMORY_BLOCK mem_block;
 1424 
 1425         DEBUGOUT(NVE_DEBUG_API, "nve: nve_osfreeex\n");
 1426 
 1427         mem_block.pLogical = mem_block_ex->pLogicalOrig;
 1428         mem_block.pPhysical = (PVOID)((ulong)mem_block_ex->pPhysicalOrigLow);
 1429         mem_block.uiLength = mem_block_ex->uiLengthOrig;
 1430 
 1431         return (nve_osfree(ctx, &mem_block));
 1432 }
 1433 
 1434 /* Clear memory region */
 1435 static NV_SINT32
 1436 nve_osclear(PNV_VOID ctx, PNV_VOID mem, NV_SINT32 length)
 1437 {
 1438         DEBUGOUT(NVE_DEBUG_API, "nve: nve_osclear\n");
 1439         memset(mem, 0, length);
 1440         return (1);
 1441 }
 1442 
 1443 /* Sleep for a tick */
 1444 static NV_SINT32
 1445 nve_osdelay(PNV_VOID ctx, NV_UINT32 usec)
 1446 {
 1447         DELAY(usec);
 1448         return (1);
 1449 }
 1450 
 1451 /* Allocate memory for rx buffer */
 1452 static NV_SINT32
 1453 nve_osallocrxbuf(PNV_VOID ctx, PMEMORY_BLOCK mem, PNV_VOID *id)
 1454 {
 1455         struct nve_softc *sc = ctx;
 1456         struct nve_rx_desc *desc;
 1457         struct nve_map_buffer *buf;
 1458         int error;
 1459 
 1460         if (device_is_attached(sc->dev))
 1461                 NVE_LOCK_ASSERT(sc);
 1462 
 1463         DEBUGOUT(NVE_DEBUG_API, "nve: nve_osallocrxbuf\n");
 1464 
 1465         if (sc->pending_rxs == RX_RING_SIZE) {
 1466                 device_printf(sc->dev, "rx ring buffer is full\n");
 1467                 goto fail;
 1468         }
 1469         desc = sc->rx_desc + sc->cur_rx;
 1470         buf = &desc->buf;
 1471 
 1472         if (buf->mbuf == NULL) {
 1473                 buf->mbuf = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR);
 1474                 if (buf->mbuf == NULL) {
 1475                         device_printf(sc->dev, "failed to allocate memory\n");
 1476                         goto fail;
 1477                 }
 1478                 buf->mbuf->m_len = buf->mbuf->m_pkthdr.len = MCLBYTES;
 1479                 m_adj(buf->mbuf, ETHER_ALIGN);
 1480 
 1481                 error = bus_dmamap_load_mbuf(sc->mtag, buf->map, buf->mbuf,
 1482                     nve_dmamap_rx_cb, &desc->paddr, 0);
 1483                 if (error) {
 1484                         device_printf(sc->dev, "failed to dmamap mbuf\n");
 1485                         m_freem(buf->mbuf);
 1486                         buf->mbuf = NULL;
 1487                         goto fail;
 1488                 }
 1489                 bus_dmamap_sync(sc->mtag, buf->map, BUS_DMASYNC_PREREAD);
 1490                 desc->buflength = buf->mbuf->m_len;
 1491                 desc->vaddr = mtod(buf->mbuf, caddr_t);
 1492         }
 1493         sc->pending_rxs++;
 1494         sc->cur_rx = (sc->cur_rx + 1) % RX_RING_SIZE;
 1495 
 1496         mem->pLogical = (void *)desc->vaddr;
 1497         mem->pPhysical = (void *)desc->paddr;
 1498         mem->uiLength = desc->buflength;
 1499         *id = (void *)desc;
 1500 
 1501         return (1);
 1502         
 1503 fail:
 1504         return (0);
 1505 }
 1506 
 1507 /* Free the rx buffer */
 1508 static NV_SINT32
 1509 nve_osfreerxbuf(PNV_VOID ctx, PMEMORY_BLOCK mem, PNV_VOID id)
 1510 {
 1511         struct nve_softc *sc = ctx;
 1512         struct nve_rx_desc *desc;
 1513         struct nve_map_buffer *buf;
 1514 
 1515         DEBUGOUT(NVE_DEBUG_API, "nve: nve_osfreerxbuf\n");
 1516 
 1517         desc = (struct nve_rx_desc *) id;
 1518         buf = &desc->buf;
 1519 
 1520         if (buf->mbuf) {
 1521                 bus_dmamap_unload(sc->mtag, buf->map);
 1522                 bus_dmamap_destroy(sc->mtag, buf->map);
 1523                 m_freem(buf->mbuf);
 1524         }
 1525         sc->pending_rxs--;
 1526         buf->mbuf = NULL;
 1527 
 1528         return (1);
 1529 }
 1530 
 1531 /* This gets called by the Nvidia API after our TX packet has been sent */
 1532 static NV_SINT32
 1533 nve_ospackettx(PNV_VOID ctx, PNV_VOID id, NV_UINT32 success)
 1534 {
 1535         struct nve_softc *sc = ctx;
 1536         struct nve_map_buffer *buf;
 1537         struct nve_tx_desc *desc = (struct nve_tx_desc *) id;
 1538         struct ifnet *ifp;
 1539 
 1540         NVE_LOCK_ASSERT(sc);
 1541 
 1542         DEBUGOUT(NVE_DEBUG_API, "nve: nve_ospackettx\n");
 1543 
 1544         ifp = sc->ifp;
 1545         buf = &desc->buf;
 1546         sc->pending_txs--;
 1547 
 1548         /* Unload and free mbuf cluster */
 1549         if (buf->mbuf == NULL)
 1550                 goto fail;
 1551 
 1552         bus_dmamap_sync(sc->mtag, buf->map, BUS_DMASYNC_POSTWRITE);
 1553         bus_dmamap_unload(sc->mtag, buf->map);
 1554         m_freem(buf->mbuf);
 1555         buf->mbuf = NULL;
 1556 
 1557         /* Send more packets if we have them */
 1558         if (sc->pending_txs < TX_RING_SIZE)
 1559                 sc->ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
 1560 
 1561         if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd) && sc->pending_txs < TX_RING_SIZE)
 1562                 nve_ifstart_locked(ifp);
 1563 
 1564 fail:
 1565 
 1566         return (1);
 1567 }
 1568 
 1569 /* This gets called by the Nvidia API when a new packet has been received */
 1570 /* XXX What is newbuf used for? XXX */
 1571 static NV_SINT32
 1572 nve_ospacketrx(PNV_VOID ctx, PNV_VOID data, NV_UINT32 success, NV_UINT8 *newbuf,
 1573     NV_UINT8 priority)
 1574 {
 1575         struct nve_softc *sc = ctx;
 1576         struct ifnet *ifp;
 1577         struct nve_rx_desc *desc;
 1578         struct nve_map_buffer *buf;
 1579         ADAPTER_READ_DATA *readdata;
 1580         struct mbuf *m;
 1581 
 1582         NVE_LOCK_ASSERT(sc);
 1583 
 1584         DEBUGOUT(NVE_DEBUG_API, "nve: nve_ospacketrx\n");
 1585 
 1586         ifp = sc->ifp;
 1587 
 1588         readdata = (ADAPTER_READ_DATA *) data;
 1589         desc = readdata->pvID;
 1590         buf = &desc->buf;
 1591         bus_dmamap_sync(sc->mtag, buf->map, BUS_DMASYNC_POSTREAD);
 1592 
 1593         if (success) {
 1594                 /* Sync DMA bounce buffer. */
 1595                 bus_dmamap_sync(sc->mtag, buf->map, BUS_DMASYNC_POSTREAD);
 1596 
 1597                 /* First mbuf in packet holds the ethernet and packet headers */
 1598                 buf->mbuf->m_pkthdr.rcvif = ifp;
 1599                 buf->mbuf->m_pkthdr.len = buf->mbuf->m_len =
 1600                     readdata->ulTotalLength;
 1601 
 1602                 bus_dmamap_unload(sc->mtag, buf->map);
 1603 
 1604                 /* Blat the mbuf pointer, kernel will free the mbuf cluster */
 1605                 m = buf->mbuf;
 1606                 buf->mbuf = NULL;
 1607 
 1608                 /* Give mbuf to OS. */
 1609                 NVE_UNLOCK(sc);
 1610                 (*ifp->if_input)(ifp, m);
 1611                 NVE_LOCK(sc);
 1612                 if (readdata->ulFilterMatch & ADREADFL_MULTICAST_MATCH)
 1613                         ifp->if_imcasts++;
 1614 
 1615         } else {
 1616                 bus_dmamap_sync(sc->mtag, buf->map, BUS_DMASYNC_POSTREAD);
 1617                 bus_dmamap_unload(sc->mtag, buf->map);
 1618                 m_freem(buf->mbuf);
 1619                 buf->mbuf = NULL;
 1620         }
 1621 
 1622         sc->cur_rx = desc - sc->rx_desc;
 1623         sc->pending_rxs--;
 1624 
 1625         return (1);
 1626 }
 1627 
 1628 /* This gets called by NVIDIA API when the PHY link state changes */
 1629 static NV_SINT32
 1630 nve_oslinkchg(PNV_VOID ctx, NV_SINT32 enabled)
 1631 {
 1632 
 1633         DEBUGOUT(NVE_DEBUG_API, "nve: nve_oslinkchg\n");
 1634 
 1635         return (1);
 1636 }
 1637 
 1638 /* Setup a watchdog timer */
 1639 static NV_SINT32
 1640 nve_osalloctimer(PNV_VOID ctx, PNV_VOID *timer)
 1641 {
 1642         struct nve_softc *sc = (struct nve_softc *)ctx;
 1643 
 1644         DEBUGOUT(NVE_DEBUG_BROKEN, "nve: nve_osalloctimer\n");
 1645 
 1646         callout_init(&sc->ostimer, CALLOUT_MPSAFE);
 1647         *timer = &sc->ostimer;
 1648 
 1649         return (1);
 1650 }
 1651 
 1652 /* Free the timer */
 1653 static NV_SINT32
 1654 nve_osfreetimer(PNV_VOID ctx, PNV_VOID timer)
 1655 {
 1656 
 1657         DEBUGOUT(NVE_DEBUG_BROKEN, "nve: nve_osfreetimer\n");
 1658 
 1659         callout_drain((struct callout *)timer);
 1660 
 1661         return (1);
 1662 }
 1663 
 1664 /* Setup timer parameters */
 1665 static NV_SINT32
 1666 nve_osinittimer(PNV_VOID ctx, PNV_VOID timer, PTIMER_FUNC func, PNV_VOID parameters)
 1667 {
 1668         struct nve_softc *sc = (struct nve_softc *)ctx;
 1669 
 1670         DEBUGOUT(NVE_DEBUG_BROKEN, "nve: nve_osinittimer\n");
 1671 
 1672         sc->ostimer_func = func;
 1673         sc->ostimer_params = parameters;
 1674 
 1675         return (1);
 1676 }
 1677 
 1678 /* Set the timer to go off */
 1679 static NV_SINT32
 1680 nve_ossettimer(PNV_VOID ctx, PNV_VOID timer, NV_UINT32 delay)
 1681 {
 1682         struct nve_softc *sc = ctx;
 1683 
 1684         DEBUGOUT(NVE_DEBUG_BROKEN, "nve: nve_ossettimer\n");
 1685 
 1686         callout_reset((struct callout *)timer, delay, sc->ostimer_func,
 1687             sc->ostimer_params);
 1688 
 1689         return (1);
 1690 }
 1691 
 1692 /* Cancel the timer */
 1693 static NV_SINT32
 1694 nve_oscanceltimer(PNV_VOID ctx, PNV_VOID timer)
 1695 {
 1696 
 1697         DEBUGOUT(NVE_DEBUG_BROKEN, "nve: nve_oscanceltimer\n");
 1698 
 1699         callout_stop((struct callout *)timer);
 1700 
 1701         return (1);
 1702 }
 1703 
 1704 static NV_SINT32
 1705 nve_ospreprocpkt(PNV_VOID ctx, PNV_VOID readdata, PNV_VOID *id,
 1706     NV_UINT8 *newbuffer, NV_UINT8 priority)
 1707 {
 1708 
 1709         /* Not implemented */
 1710         DEBUGOUT(NVE_DEBUG_BROKEN, "nve: nve_ospreprocpkt\n");
 1711 
 1712         return (1);
 1713 }
 1714 
 1715 static PNV_VOID
 1716 nve_ospreprocpktnopq(PNV_VOID ctx, PNV_VOID readdata)
 1717 {
 1718 
 1719         /* Not implemented */
 1720         DEBUGOUT(NVE_DEBUG_BROKEN, "nve: nve_ospreprocpkt\n");
 1721 
 1722         return (NULL);
 1723 }
 1724 
 1725 static NV_SINT32
 1726 nve_osindicatepkt(PNV_VOID ctx, PNV_VOID *id, NV_UINT32 pktno)
 1727 {
 1728 
 1729         /* Not implemented */
 1730         DEBUGOUT(NVE_DEBUG_BROKEN, "nve: nve_osindicatepkt\n");
 1731 
 1732         return (1);
 1733 }
 1734 
 1735 /* Allocate mutex context (already done in nve_attach) */
 1736 static NV_SINT32
 1737 nve_oslockalloc(PNV_VOID ctx, NV_SINT32 type, PNV_VOID *pLock)
 1738 {
 1739         struct nve_softc *sc = (struct nve_softc *)ctx;
 1740 
 1741         DEBUGOUT(NVE_DEBUG_LOCK, "nve: nve_oslockalloc\n");
 1742 
 1743         *pLock = (void **)sc;
 1744 
 1745         return (1);
 1746 }
 1747 
 1748 /* Obtain a spin lock */
 1749 static NV_SINT32
 1750 nve_oslockacquire(PNV_VOID ctx, NV_SINT32 type, PNV_VOID lock)
 1751 {
 1752 
 1753         DEBUGOUT(NVE_DEBUG_LOCK, "nve: nve_oslockacquire\n");
 1754 
 1755         return (1);
 1756 }
 1757 
 1758 /* Release lock */
 1759 static NV_SINT32
 1760 nve_oslockrelease(PNV_VOID ctx, NV_SINT32 type, PNV_VOID lock)
 1761 {
 1762 
 1763         DEBUGOUT(NVE_DEBUG_LOCK, "nve: nve_oslockrelease\n");
 1764 
 1765         return (1);
 1766 }
 1767 
 1768 /* I have no idea what this is for */
 1769 static PNV_VOID
 1770 nve_osreturnbufvirt(PNV_VOID ctx, PNV_VOID readdata)
 1771 {
 1772 
 1773         /* Not implemented */
 1774         DEBUGOUT(NVE_DEBUG_LOCK, "nve: nve_osreturnbufvirt\n");
 1775         panic("nve: nve_osreturnbufvirtual not implemented\n");
 1776 
 1777         return (NULL);
 1778 }
 1779 
 1780 /* --- End on NVOSAPI interface --- */

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