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: releng/8.1/sys/dev/nve/if_nve.c 203361 2010-02-01 22:01:48Z jhb $");
   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 int      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         {PCI_VENDOR_NVIDIA, PCI_PRODUCT_NVIDIA_NFORCE_LAN,
  215             "NVIDIA nForce MCP Networking Adapter"},
  216         {PCI_VENDOR_NVIDIA, PCI_PRODUCT_NVIDIA_NFORCE2_LAN,
  217             "NVIDIA nForce2 MCP2 Networking Adapter"},
  218         {PCI_VENDOR_NVIDIA, PCI_PRODUCT_NVIDIA_NFORCE2_400_LAN1,
  219             "NVIDIA nForce2 400 MCP4 Networking Adapter"},
  220         {PCI_VENDOR_NVIDIA, PCI_PRODUCT_NVIDIA_NFORCE2_400_LAN2,
  221             "NVIDIA nForce2 400 MCP5 Networking Adapter"},
  222         {PCI_VENDOR_NVIDIA, PCI_PRODUCT_NVIDIA_NFORCE3_LAN1,
  223             "NVIDIA nForce3 MCP3 Networking Adapter"},
  224         {PCI_VENDOR_NVIDIA, PCI_PRODUCT_NVIDIA_NFORCE3_250_LAN,
  225             "NVIDIA nForce3 250 MCP6 Networking Adapter"},
  226         {PCI_VENDOR_NVIDIA, PCI_PRODUCT_NVIDIA_NFORCE3_LAN4,
  227             "NVIDIA nForce3 MCP7 Networking Adapter"},
  228         {PCI_VENDOR_NVIDIA, PCI_PRODUCT_NVIDIA_NFORCE4_LAN1,
  229             "NVIDIA nForce4 CK804 MCP8 Networking Adapter"},
  230         {PCI_VENDOR_NVIDIA, PCI_PRODUCT_NVIDIA_NFORCE4_LAN2,
  231             "NVIDIA nForce4 CK804 MCP9 Networking Adapter"},
  232         {PCI_VENDOR_NVIDIA, PCI_PRODUCT_NVIDIA_MCP04_LAN1,
  233             "NVIDIA nForce MCP04 Networking Adapter"},          // MCP10
  234         {PCI_VENDOR_NVIDIA, PCI_PRODUCT_NVIDIA_MCP04_LAN2,
  235             "NVIDIA nForce MCP04 Networking Adapter"},          // MCP11
  236         {PCI_VENDOR_NVIDIA, PCI_PRODUCT_NVIDIA_NFORCE430_LAN1,
  237             "NVIDIA nForce 430 MCP12 Networking Adapter"},
  238         {PCI_VENDOR_NVIDIA, PCI_PRODUCT_NVIDIA_NFORCE430_LAN2,
  239             "NVIDIA nForce 430 MCP13 Networking Adapter"},
  240         {PCI_VENDOR_NVIDIA, PCI_PRODUCT_NVIDIA_MCP55_LAN1,
  241             "NVIDIA nForce MCP55 Networking Adapter"},
  242         {PCI_VENDOR_NVIDIA, PCI_PRODUCT_NVIDIA_MCP55_LAN2,
  243             "NVIDIA nForce MCP55 Networking Adapter"},
  244         {PCI_VENDOR_NVIDIA, PCI_PRODUCT_NVIDIA_MCP61_LAN1,
  245             "NVIDIA nForce MCP61 Networking Adapter"},
  246         {PCI_VENDOR_NVIDIA, PCI_PRODUCT_NVIDIA_MCP61_LAN2,
  247             "NVIDIA nForce MCP61 Networking Adapter"},
  248         {PCI_VENDOR_NVIDIA, PCI_PRODUCT_NVIDIA_MCP61_LAN3,
  249             "NVIDIA nForce MCP61 Networking Adapter"},
  250         {PCI_VENDOR_NVIDIA, PCI_PRODUCT_NVIDIA_MCP61_LAN4,
  251             "NVIDIA nForce MCP61 Networking Adapter"},
  252         {PCI_VENDOR_NVIDIA, PCI_PRODUCT_NVIDIA_MCP65_LAN1,
  253             "NVIDIA nForce MCP65 Networking Adapter"},
  254         {PCI_VENDOR_NVIDIA, PCI_PRODUCT_NVIDIA_MCP65_LAN2,
  255             "NVIDIA nForce MCP65 Networking Adapter"},
  256         {PCI_VENDOR_NVIDIA, PCI_PRODUCT_NVIDIA_MCP65_LAN3,
  257             "NVIDIA nForce MCP65 Networking Adapter"},
  258         {PCI_VENDOR_NVIDIA, PCI_PRODUCT_NVIDIA_MCP65_LAN4,
  259             "NVIDIA nForce MCP65 Networking Adapter"},
  260         {0, 0, NULL}
  261 };
  262 
  263 /* DMA MEM map callback function to get data segment physical address */
  264 static void
  265 nve_dmamap_cb(void *arg, bus_dma_segment_t * segs, int nsegs, int error)
  266 {
  267         if (error)
  268                 return;
  269 
  270         KASSERT(nsegs == 1,
  271             ("Too many DMA segments returned when mapping DMA memory"));
  272         *(bus_addr_t *)arg = segs->ds_addr;
  273 }
  274 
  275 /* DMA RX map callback function to get data segment physical address */
  276 static void
  277 nve_dmamap_rx_cb(void *arg, bus_dma_segment_t * segs, int nsegs,
  278     bus_size_t mapsize, int error)
  279 {
  280         if (error)
  281                 return;
  282         *(bus_addr_t *)arg = segs->ds_addr;
  283 }
  284 
  285 /*
  286  * DMA TX buffer callback function to allocate fragment data segment
  287  * addresses
  288  */
  289 static void
  290 nve_dmamap_tx_cb(void *arg, bus_dma_segment_t * segs, int nsegs, bus_size_t mapsize, int error)
  291 {
  292         struct nve_tx_desc *info;
  293 
  294         info = arg;
  295         if (error)
  296                 return;
  297         KASSERT(nsegs < NV_MAX_FRAGS,
  298             ("Too many DMA segments returned when mapping mbuf"));
  299         info->numfrags = nsegs;
  300         bcopy(segs, info->frags, nsegs * sizeof(bus_dma_segment_t));
  301 }
  302 
  303 /* Probe for supported hardware ID's */
  304 static int
  305 nve_probe(device_t dev)
  306 {
  307         struct nve_type *t;
  308 
  309         t = nve_devs;
  310         /* Check for matching PCI DEVICE ID's */
  311         while (t->name != NULL) {
  312                 if ((pci_get_vendor(dev) == t->vid_id) &&
  313                     (pci_get_device(dev) == t->dev_id)) {
  314                         device_set_desc(dev, t->name);
  315                         return (BUS_PROBE_LOW_PRIORITY);
  316                 }
  317                 t++;
  318         }
  319 
  320         return (ENXIO);
  321 }
  322 
  323 /* Attach driver and initialise hardware for use */
  324 static int
  325 nve_attach(device_t dev)
  326 {
  327         u_char                  eaddr[ETHER_ADDR_LEN];
  328         struct nve_softc        *sc;
  329         struct ifnet            *ifp;
  330         OS_API                  *osapi;
  331         ADAPTER_OPEN_PARAMS     OpenParams;
  332         int                     error = 0, i, rid;
  333 
  334         if (bootverbose)
  335                 device_printf(dev, "nvenetlib.o version %s\n", DRIVER_VERSION);
  336 
  337         DEBUGOUT(NVE_DEBUG_INIT, "nve: nve_attach - entry\n");
  338 
  339         sc = device_get_softc(dev);
  340 
  341         /* Allocate mutex */
  342         mtx_init(&sc->mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK,
  343             MTX_DEF);
  344         callout_init_mtx(&sc->stat_callout, &sc->mtx, 0);
  345 
  346         sc->dev = dev;
  347 
  348         /* Preinitialize data structures */
  349         bzero(&OpenParams, sizeof(ADAPTER_OPEN_PARAMS));
  350 
  351         /* Enable bus mastering */
  352         pci_enable_busmaster(dev);
  353 
  354         /* Allocate memory mapped address space */
  355         rid = NV_RID;
  356         sc->res = bus_alloc_resource(dev, SYS_RES_MEMORY, &rid, 0, ~0, 1,
  357             RF_ACTIVE);
  358 
  359         if (sc->res == NULL) {
  360                 device_printf(dev, "couldn't map memory\n");
  361                 error = ENXIO;
  362                 goto fail;
  363         }
  364         sc->sc_st = rman_get_bustag(sc->res);
  365         sc->sc_sh = rman_get_bushandle(sc->res);
  366 
  367         /* Allocate interrupt */
  368         rid = 0;
  369         sc->irq = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0, ~0, 1,
  370             RF_SHAREABLE | RF_ACTIVE);
  371 
  372         if (sc->irq == NULL) {
  373                 device_printf(dev, "couldn't map interrupt\n");
  374                 error = ENXIO;
  375                 goto fail;
  376         }
  377         /* Allocate DMA tags */
  378         error = bus_dma_tag_create(NULL, 4, 0, BUS_SPACE_MAXADDR_32BIT,
  379                      BUS_SPACE_MAXADDR, NULL, NULL, MCLBYTES * NV_MAX_FRAGS,
  380                                    NV_MAX_FRAGS, MCLBYTES, 0,
  381                                    busdma_lock_mutex, &Giant,
  382                                    &sc->mtag);
  383         if (error) {
  384                 device_printf(dev, "couldn't allocate dma tag\n");
  385                 goto fail;
  386         }
  387         error = bus_dma_tag_create(NULL, 4, 0, BUS_SPACE_MAXADDR_32BIT,
  388             BUS_SPACE_MAXADDR, NULL, NULL,
  389             sizeof(struct nve_rx_desc) * RX_RING_SIZE, 1,
  390             sizeof(struct nve_rx_desc) * RX_RING_SIZE, 0,
  391             busdma_lock_mutex, &Giant,
  392             &sc->rtag);
  393         if (error) {
  394                 device_printf(dev, "couldn't allocate dma tag\n");
  395                 goto fail;
  396         }
  397         error = bus_dma_tag_create(NULL, 4, 0, BUS_SPACE_MAXADDR_32BIT,
  398             BUS_SPACE_MAXADDR, NULL, NULL,
  399             sizeof(struct nve_tx_desc) * TX_RING_SIZE, 1,
  400             sizeof(struct nve_tx_desc) * TX_RING_SIZE, 0,
  401             busdma_lock_mutex, &Giant,
  402             &sc->ttag);
  403         if (error) {
  404                 device_printf(dev, "couldn't allocate dma tag\n");
  405                 goto fail;
  406         }
  407         /* Allocate DMA safe memory and get the DMA addresses. */
  408         error = bus_dmamem_alloc(sc->ttag, (void **)&sc->tx_desc,
  409             BUS_DMA_WAITOK, &sc->tmap);
  410         if (error) {
  411                 device_printf(dev, "couldn't allocate dma memory\n");
  412                 goto fail;
  413         }
  414         bzero(sc->tx_desc, sizeof(struct nve_tx_desc) * TX_RING_SIZE);
  415         error = bus_dmamap_load(sc->ttag, sc->tmap, sc->tx_desc,
  416                     sizeof(struct nve_tx_desc) * TX_RING_SIZE, nve_dmamap_cb,
  417                     &sc->tx_addr, 0);
  418         if (error) {
  419                 device_printf(dev, "couldn't map dma memory\n");
  420                 goto fail;
  421         }
  422         error = bus_dmamem_alloc(sc->rtag, (void **)&sc->rx_desc,
  423             BUS_DMA_WAITOK, &sc->rmap);
  424         if (error) {
  425                 device_printf(dev, "couldn't allocate dma memory\n");
  426                 goto fail;
  427         }
  428         bzero(sc->rx_desc, sizeof(struct nve_rx_desc) * RX_RING_SIZE);
  429         error = bus_dmamap_load(sc->rtag, sc->rmap, sc->rx_desc,
  430             sizeof(struct nve_rx_desc) * RX_RING_SIZE, nve_dmamap_cb,
  431             &sc->rx_addr, 0);
  432         if (error) {
  433                 device_printf(dev, "couldn't map dma memory\n");
  434                 goto fail;
  435         }
  436         /* Initialize rings. */
  437         if (nve_init_rings(sc)) {
  438                 device_printf(dev, "failed to init rings\n");
  439                 error = ENXIO;
  440                 goto fail;
  441         }
  442         /* Setup NVIDIA API callback routines */
  443         osapi                           = &sc->osapi;
  444         osapi->pOSCX                    = sc;
  445         osapi->pfnAllocMemory           = nve_osalloc;
  446         osapi->pfnFreeMemory            = nve_osfree;
  447         osapi->pfnAllocMemoryEx         = nve_osallocex;
  448         osapi->pfnFreeMemoryEx          = nve_osfreeex;
  449         osapi->pfnClearMemory           = nve_osclear;
  450         osapi->pfnStallExecution        = nve_osdelay;
  451         osapi->pfnAllocReceiveBuffer    = nve_osallocrxbuf;
  452         osapi->pfnFreeReceiveBuffer     = nve_osfreerxbuf;
  453         osapi->pfnPacketWasSent         = nve_ospackettx;
  454         osapi->pfnPacketWasReceived     = nve_ospacketrx;
  455         osapi->pfnLinkStateHasChanged   = nve_oslinkchg;
  456         osapi->pfnAllocTimer            = nve_osalloctimer;
  457         osapi->pfnFreeTimer             = nve_osfreetimer;
  458         osapi->pfnInitializeTimer       = nve_osinittimer;
  459         osapi->pfnSetTimer              = nve_ossettimer;
  460         osapi->pfnCancelTimer           = nve_oscanceltimer;
  461         osapi->pfnPreprocessPacket      = nve_ospreprocpkt;
  462         osapi->pfnPreprocessPacketNopq  = nve_ospreprocpktnopq;
  463         osapi->pfnIndicatePackets       = nve_osindicatepkt;
  464         osapi->pfnLockAlloc             = nve_oslockalloc;
  465         osapi->pfnLockAcquire           = nve_oslockacquire;
  466         osapi->pfnLockRelease           = nve_oslockrelease;
  467         osapi->pfnReturnBufferVirtual   = nve_osreturnbufvirt;
  468 
  469         sc->linkup = FALSE;
  470         sc->max_frame_size = ETHERMTU + ETHER_HDR_LEN + FCS_LEN;
  471 
  472         /* TODO - We don't support hardware offload yet */
  473         sc->hwmode = 1;
  474         sc->media = 0;
  475 
  476         /* Set NVIDIA API startup parameters */
  477         OpenParams.MaxDpcLoop = 2;
  478         OpenParams.MaxRxPkt = RX_RING_SIZE;
  479         OpenParams.MaxTxPkt = TX_RING_SIZE;
  480         OpenParams.SentPacketStatusSuccess = 1;
  481         OpenParams.SentPacketStatusFailure = 0;
  482         OpenParams.MaxRxPktToAccumulate = 6;
  483         OpenParams.ulPollInterval = nve_pollinterval;
  484         OpenParams.SetForcedModeEveryNthRxPacket = 0;
  485         OpenParams.SetForcedModeEveryNthTxPacket = 0;
  486         OpenParams.RxForcedInterrupt = 0;
  487         OpenParams.TxForcedInterrupt = 0;
  488         OpenParams.pOSApi = osapi;
  489         OpenParams.pvHardwareBaseAddress = rman_get_virtual(sc->res);
  490         OpenParams.bASFEnabled = 0;
  491         OpenParams.ulDescriptorVersion = sc->hwmode;
  492         OpenParams.ulMaxPacketSize = sc->max_frame_size;
  493         OpenParams.DeviceId = pci_get_device(dev);
  494 
  495         /* Open NVIDIA Hardware API */
  496         error = ADAPTER_Open(&OpenParams, (void **)&(sc->hwapi), &sc->phyaddr);
  497         if (error) {
  498                 device_printf(dev,
  499                     "failed to open NVIDIA Hardware API: 0x%x\n", error);
  500                 goto fail;
  501         }
  502         
  503         /* TODO - Add support for MODE2 hardware offload */ 
  504         
  505         bzero(&sc->adapterdata, sizeof(sc->adapterdata));
  506         
  507         sc->adapterdata.ulMediaIF = sc->media;
  508         sc->adapterdata.ulModeRegTxReadCompleteEnable = 1;
  509         sc->hwapi->pfnSetCommonData(sc->hwapi->pADCX, &sc->adapterdata);
  510         
  511         /* MAC is loaded backwards into h/w reg */
  512         sc->hwapi->pfnGetNodeAddress(sc->hwapi->pADCX, sc->original_mac_addr);
  513         for (i = 0; i < 6; i++) {
  514                 eaddr[i] = sc->original_mac_addr[5 - i];
  515         }
  516         sc->hwapi->pfnSetNodeAddress(sc->hwapi->pADCX, eaddr);
  517 
  518         /* Display ethernet address ,... */
  519         device_printf(dev, "Ethernet address %6D\n", eaddr, ":");
  520 
  521         /* Allocate interface structures */
  522         ifp = sc->ifp = if_alloc(IFT_ETHER);
  523         if (ifp == NULL) {
  524                 device_printf(dev, "can not if_alloc()\n");
  525                 error = ENOSPC;
  526                 goto fail;
  527         }
  528 
  529         /* Setup interface parameters */
  530         ifp->if_softc = sc;
  531         if_initname(ifp, device_get_name(dev), device_get_unit(dev));
  532         ifp->if_flags = IFF_BROADCAST | IFF_SIMPLEX | IFF_MULTICAST;
  533         ifp->if_ioctl = nve_ioctl;
  534         ifp->if_start = nve_ifstart;
  535         ifp->if_watchdog = nve_watchdog;
  536         ifp->if_timer = 0;
  537         ifp->if_init = nve_init;
  538         ifp->if_mtu = ETHERMTU;
  539         ifp->if_baudrate = IF_Mbps(100);
  540         IFQ_SET_MAXLEN(&ifp->if_snd, TX_RING_SIZE - 1);
  541         ifp->if_snd.ifq_drv_maxlen = TX_RING_SIZE - 1;
  542         IFQ_SET_READY(&ifp->if_snd);
  543         ifp->if_capabilities |= IFCAP_VLAN_MTU;
  544         ifp->if_capenable |= IFCAP_VLAN_MTU;
  545 
  546         /* Probe device for MII interface to PHY */
  547         DEBUGOUT(NVE_DEBUG_INIT, "nve: do mii_phy_probe\n");
  548         if (mii_phy_probe(dev, &sc->miibus, nve_ifmedia_upd, nve_ifmedia_sts)) {
  549                 device_printf(dev, "MII without any phy!\n");
  550                 error = ENXIO;
  551                 goto fail;
  552         }
  553 
  554         /* Attach to OS's managers. */
  555         ether_ifattach(ifp, eaddr);
  556 
  557         /* Activate our interrupt handler. - attach last to avoid lock */
  558         error = bus_setup_intr(sc->dev, sc->irq, INTR_TYPE_NET | INTR_MPSAFE,
  559             NULL, nve_intr, sc, &sc->sc_ih);
  560         if (error) {
  561                 device_printf(sc->dev, "couldn't set up interrupt handler\n");
  562                 goto fail;
  563         }
  564         DEBUGOUT(NVE_DEBUG_INIT, "nve: nve_attach - exit\n");
  565 
  566 fail:
  567         if (error)
  568                 nve_detach(dev);
  569 
  570         return (error);
  571 }
  572 
  573 /* Detach interface for module unload */
  574 static int
  575 nve_detach(device_t dev)
  576 {
  577         struct nve_softc *sc = device_get_softc(dev);
  578         struct ifnet *ifp;
  579 
  580         KASSERT(mtx_initialized(&sc->mtx), ("mutex not initialized"));
  581 
  582         DEBUGOUT(NVE_DEBUG_DEINIT, "nve: nve_detach - entry\n");
  583 
  584         ifp = sc->ifp;
  585 
  586         if (device_is_attached(dev)) {
  587                 ether_ifdetach(ifp);
  588                 NVE_LOCK(sc);
  589                 nve_stop(sc);
  590                 NVE_UNLOCK(sc);
  591                 callout_drain(&sc->stat_callout);
  592         }
  593 
  594         if (sc->miibus)
  595                 device_delete_child(dev, sc->miibus);
  596         bus_generic_detach(dev);
  597 
  598         /* Reload unreversed address back into MAC in original state */
  599         if (sc->original_mac_addr)
  600                 sc->hwapi->pfnSetNodeAddress(sc->hwapi->pADCX,
  601                     sc->original_mac_addr);
  602 
  603         DEBUGOUT(NVE_DEBUG_DEINIT, "nve: do pfnClose\n");
  604         /* Detach from NVIDIA hardware API */
  605         if (sc->hwapi->pfnClose)
  606                 sc->hwapi->pfnClose(sc->hwapi->pADCX, FALSE);
  607         /* Release resources */
  608         if (sc->sc_ih)
  609                 bus_teardown_intr(sc->dev, sc->irq, sc->sc_ih);
  610         if (sc->irq)
  611                 bus_release_resource(sc->dev, SYS_RES_IRQ, 0, sc->irq);
  612         if (sc->res)
  613                 bus_release_resource(sc->dev, SYS_RES_MEMORY, NV_RID, sc->res);
  614 
  615         nve_free_rings(sc);
  616 
  617         if (sc->tx_desc) {
  618                 bus_dmamap_unload(sc->rtag, sc->rmap);
  619                 bus_dmamem_free(sc->rtag, sc->rx_desc, sc->rmap);
  620                 bus_dmamap_destroy(sc->rtag, sc->rmap);
  621         }
  622         if (sc->mtag)
  623                 bus_dma_tag_destroy(sc->mtag);
  624         if (sc->ttag)
  625                 bus_dma_tag_destroy(sc->ttag);
  626         if (sc->rtag)
  627                 bus_dma_tag_destroy(sc->rtag);
  628 
  629         if (ifp)
  630                 if_free(ifp);
  631         mtx_destroy(&sc->mtx);
  632 
  633         DEBUGOUT(NVE_DEBUG_DEINIT, "nve: nve_detach - exit\n");
  634 
  635         return (0);
  636 }
  637 
  638 /* Initialise interface and start it "RUNNING" */
  639 static void
  640 nve_init(void *xsc)
  641 {
  642         struct nve_softc *sc = xsc;
  643 
  644         NVE_LOCK(sc);
  645         nve_init_locked(sc);
  646         NVE_UNLOCK(sc);
  647 }
  648 
  649 static void
  650 nve_init_locked(struct nve_softc *sc)
  651 {
  652         struct ifnet *ifp;
  653         int error;
  654 
  655         NVE_LOCK_ASSERT(sc);
  656         DEBUGOUT(NVE_DEBUG_INIT, "nve: nve_init - entry (%d)\n", sc->linkup);
  657 
  658         ifp = sc->ifp;
  659 
  660         /* Do nothing if already running */
  661         if (ifp->if_drv_flags & IFF_DRV_RUNNING)
  662                 return;
  663 
  664         nve_stop(sc);
  665         DEBUGOUT(NVE_DEBUG_INIT, "nve: do pfnInit\n");
  666 
  667         nve_ifmedia_upd_locked(ifp);
  668 
  669         /* Setup Hardware interface and allocate memory structures */
  670         error = sc->hwapi->pfnInit(sc->hwapi->pADCX, 
  671             0, /* force speed */ 
  672             0, /* force full duplex */
  673             0, /* force mode */
  674             0, /* force async mode */
  675             &sc->linkup);
  676 
  677         if (error) {
  678                 device_printf(sc->dev,
  679                     "failed to start NVIDIA Hardware interface\n");
  680                 return;
  681         }
  682         /* Set the MAC address */
  683         sc->hwapi->pfnSetNodeAddress(sc->hwapi->pADCX, IF_LLADDR(sc->ifp));
  684         sc->hwapi->pfnEnableInterrupts(sc->hwapi->pADCX);
  685         sc->hwapi->pfnStart(sc->hwapi->pADCX);
  686 
  687         /* Setup multicast filter */
  688         nve_setmulti(sc);
  689 
  690         /* Update interface parameters */
  691         ifp->if_drv_flags |= IFF_DRV_RUNNING;
  692         ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
  693 
  694         callout_reset(&sc->stat_callout, hz, nve_tick, sc);
  695 
  696         DEBUGOUT(NVE_DEBUG_INIT, "nve: nve_init - exit\n");
  697 
  698         return;
  699 }
  700 
  701 /* Stop interface activity ie. not "RUNNING" */
  702 static void
  703 nve_stop(struct nve_softc *sc)
  704 {
  705         struct ifnet *ifp;
  706 
  707         NVE_LOCK_ASSERT(sc);
  708 
  709         DEBUGOUT(NVE_DEBUG_RUNNING, "nve: nve_stop - entry\n");
  710 
  711         ifp = sc->ifp;
  712         ifp->if_timer = 0;
  713 
  714         /* Cancel tick timer */
  715         callout_stop(&sc->stat_callout);
  716 
  717         /* Stop hardware activity */
  718         sc->hwapi->pfnDisableInterrupts(sc->hwapi->pADCX);
  719         sc->hwapi->pfnStop(sc->hwapi->pADCX, 0);
  720 
  721         DEBUGOUT(NVE_DEBUG_DEINIT, "nve: do pfnDeinit\n");
  722         /* Shutdown interface and deallocate memory buffers */
  723         if (sc->hwapi->pfnDeinit)
  724                 sc->hwapi->pfnDeinit(sc->hwapi->pADCX, 0);
  725 
  726         sc->linkup = 0;
  727         sc->cur_rx = 0;
  728         sc->pending_rxs = 0;
  729         sc->pending_txs = 0;
  730 
  731         ifp->if_drv_flags &= ~(IFF_DRV_RUNNING | IFF_DRV_OACTIVE);
  732 
  733         DEBUGOUT(NVE_DEBUG_RUNNING, "nve: nve_stop - exit\n");
  734 
  735         return;
  736 }
  737 
  738 /* Shutdown interface for unload/reboot */
  739 static int
  740 nve_shutdown(device_t dev)
  741 {
  742         struct nve_softc *sc;
  743 
  744         DEBUGOUT(NVE_DEBUG_DEINIT, "nve: nve_shutdown\n");
  745 
  746         sc = device_get_softc(dev);
  747 
  748         /* Stop hardware activity */
  749         NVE_LOCK(sc);
  750         nve_stop(sc);
  751         NVE_UNLOCK(sc);
  752 
  753         return (0);
  754 }
  755 
  756 /* Allocate TX ring buffers */
  757 static int
  758 nve_init_rings(struct nve_softc *sc)
  759 {
  760         int error, i;
  761 
  762         DEBUGOUT(NVE_DEBUG_INIT, "nve: nve_init_rings - entry\n");
  763 
  764         sc->cur_rx = sc->cur_tx = sc->pending_rxs = sc->pending_txs = 0;
  765         /* Initialise RX ring */
  766         for (i = 0; i < RX_RING_SIZE; i++) {
  767                 struct nve_rx_desc *desc = sc->rx_desc + i;
  768                 struct nve_map_buffer *buf = &desc->buf;
  769 
  770                 buf->mbuf = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR);
  771                 if (buf->mbuf == NULL) {
  772                         device_printf(sc->dev, "couldn't allocate mbuf\n");
  773                         nve_free_rings(sc);
  774                         return (ENOBUFS);
  775                 }
  776                 buf->mbuf->m_len = buf->mbuf->m_pkthdr.len = MCLBYTES;
  777                 m_adj(buf->mbuf, ETHER_ALIGN);
  778 
  779                 error = bus_dmamap_create(sc->mtag, 0, &buf->map);
  780                 if (error) {
  781                         device_printf(sc->dev, "couldn't create dma map\n");
  782                         nve_free_rings(sc);
  783                         return (error);
  784                 }
  785                 error = bus_dmamap_load_mbuf(sc->mtag, buf->map, buf->mbuf,
  786                                           nve_dmamap_rx_cb, &desc->paddr, 0);
  787                 if (error) {
  788                         device_printf(sc->dev, "couldn't dma map mbuf\n");
  789                         nve_free_rings(sc);
  790                         return (error);
  791                 }
  792                 bus_dmamap_sync(sc->mtag, buf->map, BUS_DMASYNC_PREREAD);
  793 
  794                 desc->buflength = buf->mbuf->m_len;
  795                 desc->vaddr = mtod(buf->mbuf, caddr_t);
  796         }
  797         bus_dmamap_sync(sc->rtag, sc->rmap,
  798             BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
  799 
  800         /* Initialize TX ring */
  801         for (i = 0; i < TX_RING_SIZE; i++) {
  802                 struct nve_tx_desc *desc = sc->tx_desc + i;
  803                 struct nve_map_buffer *buf = &desc->buf;
  804 
  805                 buf->mbuf = NULL;
  806 
  807                 error = bus_dmamap_create(sc->mtag, 0, &buf->map);
  808                 if (error) {
  809                         device_printf(sc->dev, "couldn't create dma map\n");
  810                         nve_free_rings(sc);
  811                         return (error);
  812                 }
  813         }
  814         bus_dmamap_sync(sc->ttag, sc->tmap,
  815             BUS_DMASYNC_PREREAD | BUS_DMASYNC_PREWRITE);
  816 
  817         DEBUGOUT(NVE_DEBUG_INIT, "nve: nve_init_rings - exit\n");
  818 
  819         return (error);
  820 }
  821 
  822 /* Free the TX ring buffers */
  823 static void
  824 nve_free_rings(struct nve_softc *sc)
  825 {
  826         int i;
  827 
  828         DEBUGOUT(NVE_DEBUG_DEINIT, "nve: nve_free_rings - entry\n");
  829 
  830         for (i = 0; i < RX_RING_SIZE; i++) {
  831                 struct nve_rx_desc *desc = sc->rx_desc + i;
  832                 struct nve_map_buffer *buf = &desc->buf;
  833 
  834                 if (buf->mbuf) {
  835                         bus_dmamap_unload(sc->mtag, buf->map);
  836                         bus_dmamap_destroy(sc->mtag, buf->map);
  837                         m_freem(buf->mbuf);
  838                 }
  839                 buf->mbuf = NULL;
  840         }
  841 
  842         for (i = 0; i < TX_RING_SIZE; i++) {
  843                 struct nve_tx_desc *desc = sc->tx_desc + i;
  844                 struct nve_map_buffer *buf = &desc->buf;
  845 
  846                 if (buf->mbuf) {
  847                         bus_dmamap_unload(sc->mtag, buf->map);
  848                         bus_dmamap_destroy(sc->mtag, buf->map);
  849                         m_freem(buf->mbuf);
  850                 }
  851                 buf->mbuf = NULL;
  852         }
  853 
  854         DEBUGOUT(NVE_DEBUG_DEINIT, "nve: nve_free_rings - exit\n");
  855 }
  856 
  857 /* Main loop for sending packets from OS to interface */
  858 static void
  859 nve_ifstart(struct ifnet *ifp)
  860 {
  861         struct nve_softc *sc = ifp->if_softc;
  862 
  863         NVE_LOCK(sc);
  864         nve_ifstart_locked(ifp);
  865         NVE_UNLOCK(sc);
  866 }
  867 
  868 static void
  869 nve_ifstart_locked(struct ifnet *ifp)
  870 {
  871         struct nve_softc *sc = ifp->if_softc;
  872         struct nve_map_buffer *buf;
  873         struct mbuf    *m0, *m;
  874         struct nve_tx_desc *desc;
  875         ADAPTER_WRITE_DATA txdata;
  876         int error, i;
  877 
  878         DEBUGOUT(NVE_DEBUG_RUNNING, "nve: nve_ifstart - entry\n");
  879 
  880         NVE_LOCK_ASSERT(sc);
  881 
  882         /* If link is down/busy or queue is empty do nothing */
  883         if (ifp->if_drv_flags & IFF_DRV_OACTIVE ||
  884             IFQ_DRV_IS_EMPTY(&ifp->if_snd))
  885                 return;
  886 
  887         /* Transmit queued packets until sent or TX ring is full */
  888         while (sc->pending_txs < TX_RING_SIZE) {
  889                 desc = sc->tx_desc + sc->cur_tx;
  890                 buf = &desc->buf;
  891 
  892                 /* Get next packet to send. */
  893                 IFQ_DRV_DEQUEUE(&ifp->if_snd, m0);
  894 
  895                 /* If nothing to send, return. */
  896                 if (m0 == NULL)
  897                         return;
  898 
  899                 /*
  900                  * On nForce4, the chip doesn't interrupt on transmit,
  901                  * so try to flush transmitted packets from the queue
  902                  * if it's getting large (see note in nve_watchdog).
  903                  */
  904                 if (sc->pending_txs > TX_RING_SIZE/2) {
  905                         sc->hwapi->pfnDisableInterrupts(sc->hwapi->pADCX);
  906                         sc->hwapi->pfnHandleInterrupt(sc->hwapi->pADCX);
  907                         sc->hwapi->pfnEnableInterrupts(sc->hwapi->pADCX);
  908                 }
  909 
  910                 /* Map MBUF for DMA access */
  911                 error = bus_dmamap_load_mbuf(sc->mtag, buf->map, m0,
  912                     nve_dmamap_tx_cb, desc, BUS_DMA_NOWAIT);
  913 
  914                 if (error && error != EFBIG) {
  915                         m_freem(m0);
  916                         sc->tx_errors++;
  917                         continue;
  918                 }
  919                 /*
  920                  * Packet has too many fragments - defrag into new mbuf
  921                  * cluster
  922                  */
  923                 if (error) {
  924                         m = m_defrag(m0, M_DONTWAIT);
  925                         if (m == NULL) {
  926                                 m_freem(m0);
  927                                 sc->tx_errors++;
  928                                 continue;
  929                         }
  930                         m0 = m;
  931 
  932                         error = bus_dmamap_load_mbuf(sc->mtag, buf->map, m,
  933                             nve_dmamap_tx_cb, desc, BUS_DMA_NOWAIT);
  934                         if (error) {
  935                                 m_freem(m);
  936                                 sc->tx_errors++;
  937                                 continue;
  938                         }
  939                 }
  940                 /* Do sync on DMA bounce buffer */
  941                 bus_dmamap_sync(sc->mtag, buf->map, BUS_DMASYNC_PREWRITE);
  942 
  943                 buf->mbuf = m0;
  944                 txdata.ulNumberOfElements = desc->numfrags;
  945                 txdata.pvID = (PVOID)desc;
  946 
  947                 /* Put fragments into API element list */
  948                 txdata.ulTotalLength = buf->mbuf->m_len;
  949                 for (i = 0; i < desc->numfrags; i++) {
  950                         txdata.sElement[i].ulLength =
  951                             (ulong)desc->frags[i].ds_len;
  952                         txdata.sElement[i].pPhysical =
  953                             (PVOID)desc->frags[i].ds_addr;
  954                 }
  955 
  956                 /* Send packet to Nvidia API for transmission */
  957                 error = sc->hwapi->pfnWrite(sc->hwapi->pADCX, &txdata);
  958 
  959                 switch (error) {
  960                 case ADAPTERERR_NONE:
  961                         /* Packet was queued in API TX queue successfully */
  962                         sc->pending_txs++;
  963                         sc->cur_tx = (sc->cur_tx + 1) % TX_RING_SIZE;
  964                         break;
  965 
  966                 case ADAPTERERR_TRANSMIT_QUEUE_FULL:
  967                         /* The API TX queue is full - requeue the packet */
  968                         device_printf(sc->dev,
  969                             "nve_ifstart: transmit queue is full\n");
  970                         ifp->if_drv_flags |= IFF_DRV_OACTIVE;
  971                         bus_dmamap_unload(sc->mtag, buf->map);
  972                         IFQ_DRV_PREPEND(&ifp->if_snd, buf->mbuf);
  973                         buf->mbuf = NULL;
  974                         return;
  975 
  976                 default:
  977                         /* The API failed to queue/send the packet so dump it */
  978                         device_printf(sc->dev, "nve_ifstart: transmit error\n");
  979                         bus_dmamap_unload(sc->mtag, buf->map);
  980                         m_freem(buf->mbuf);
  981                         buf->mbuf = NULL;
  982                         sc->tx_errors++;
  983                         return;
  984                 }
  985                 /* Set watchdog timer. */
  986                 ifp->if_timer = 8;
  987 
  988                 /* Copy packet to BPF tap */
  989                 BPF_MTAP(ifp, m0);
  990         }
  991         ifp->if_drv_flags |= IFF_DRV_OACTIVE;
  992 
  993         DEBUGOUT(NVE_DEBUG_RUNNING, "nve: nve_ifstart - exit\n");
  994 }
  995 
  996 /* Handle IOCTL events */
  997 static int
  998 nve_ioctl(struct ifnet *ifp, u_long command, caddr_t data)
  999 {
 1000         struct nve_softc *sc = ifp->if_softc;
 1001         struct ifreq *ifr = (struct ifreq *) data;
 1002         struct mii_data *mii;
 1003         int error = 0;
 1004 
 1005         DEBUGOUT(NVE_DEBUG_IOCTL, "nve: nve_ioctl - entry\n");
 1006 
 1007         switch (command) {
 1008         case SIOCSIFMTU:
 1009                 /* Set MTU size */
 1010                 NVE_LOCK(sc);
 1011                 if (ifp->if_mtu == ifr->ifr_mtu) {
 1012                         NVE_UNLOCK(sc);
 1013                         break;
 1014                 }
 1015                 if (ifr->ifr_mtu + ifp->if_hdrlen <= MAX_PACKET_SIZE_1518) {
 1016                         ifp->if_mtu = ifr->ifr_mtu;
 1017                         nve_stop(sc);
 1018                         nve_init_locked(sc);
 1019                 } else
 1020                         error = EINVAL;
 1021                 NVE_UNLOCK(sc);
 1022                 break;
 1023 
 1024         case SIOCSIFFLAGS:
 1025                 /* Setup interface flags */
 1026                 NVE_LOCK(sc);
 1027                 if (ifp->if_flags & IFF_UP) {
 1028                         if ((ifp->if_drv_flags & IFF_DRV_RUNNING) == 0) {
 1029                                 nve_init_locked(sc);
 1030                                 NVE_UNLOCK(sc);
 1031                                 break;
 1032                         }
 1033                 } else {
 1034                         if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
 1035                                 nve_stop(sc);
 1036                                 NVE_UNLOCK(sc);
 1037                                 break;
 1038                         }
 1039                 }
 1040                 /* Handle IFF_PROMISC and IFF_ALLMULTI flags. */
 1041                 nve_setmulti(sc);
 1042                 NVE_UNLOCK(sc);
 1043                 break;
 1044 
 1045         case SIOCADDMULTI:
 1046         case SIOCDELMULTI:
 1047                 /* Setup multicast filter */
 1048                 NVE_LOCK(sc);
 1049                 if (ifp->if_drv_flags & IFF_DRV_RUNNING) {
 1050                         nve_setmulti(sc);
 1051                 }
 1052                 NVE_UNLOCK(sc);
 1053                 break;
 1054 
 1055         case SIOCGIFMEDIA:
 1056         case SIOCSIFMEDIA:
 1057                 /* Get/Set interface media parameters */
 1058                 mii = device_get_softc(sc->miibus);
 1059                 error = ifmedia_ioctl(ifp, ifr, &mii->mii_media, command);
 1060                 break;
 1061 
 1062         default:
 1063                 /* Everything else we forward to generic ether ioctl */
 1064                 error = ether_ioctl(ifp, command, data);
 1065                 break;
 1066         }
 1067 
 1068         DEBUGOUT(NVE_DEBUG_IOCTL, "nve: nve_ioctl - exit\n");
 1069 
 1070         return (error);
 1071 }
 1072 
 1073 /* Interrupt service routine */
 1074 static void
 1075 nve_intr(void *arg)
 1076 {
 1077         struct nve_softc *sc = arg;
 1078         struct ifnet *ifp = sc->ifp;
 1079 
 1080         DEBUGOUT(NVE_DEBUG_INTERRUPT, "nve: nve_intr - entry\n");
 1081 
 1082         NVE_LOCK(sc);
 1083         if (!ifp->if_flags & IFF_UP) {
 1084                 nve_stop(sc);
 1085                 NVE_UNLOCK(sc);
 1086                 return;
 1087         }
 1088         /* Handle interrupt event */
 1089         if (sc->hwapi->pfnQueryInterrupt(sc->hwapi->pADCX)) {
 1090                 sc->hwapi->pfnHandleInterrupt(sc->hwapi->pADCX);
 1091                 sc->hwapi->pfnEnableInterrupts(sc->hwapi->pADCX);
 1092         }
 1093         if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd))
 1094                 nve_ifstart_locked(ifp);
 1095 
 1096         /* If no pending packets we don't need a timeout */
 1097         if (sc->pending_txs == 0)
 1098                 sc->ifp->if_timer = 0;
 1099         NVE_UNLOCK(sc);
 1100 
 1101         DEBUGOUT(NVE_DEBUG_INTERRUPT, "nve: nve_intr - exit\n");
 1102 
 1103         return;
 1104 }
 1105 
 1106 /* Setup multicast filters */
 1107 static void
 1108 nve_setmulti(struct nve_softc *sc)
 1109 {
 1110         struct ifnet *ifp;
 1111         struct ifmultiaddr *ifma;
 1112         PACKET_FILTER hwfilter;
 1113         int i;
 1114         u_int8_t andaddr[6], oraddr[6];
 1115 
 1116         NVE_LOCK_ASSERT(sc);
 1117 
 1118         DEBUGOUT(NVE_DEBUG_RUNNING, "nve: nve_setmulti - entry\n");
 1119 
 1120         ifp = sc->ifp;
 1121 
 1122         /* Initialize filter */
 1123         hwfilter.ulFilterFlags = 0;
 1124         for (i = 0; i < 6; i++) {
 1125                 hwfilter.acMulticastAddress[i] = 0;
 1126                 hwfilter.acMulticastMask[i] = 0;
 1127         }
 1128 
 1129         if (ifp->if_flags & (IFF_PROMISC | IFF_ALLMULTI)) {
 1130                 /* Accept all packets */
 1131                 hwfilter.ulFilterFlags |= ACCEPT_ALL_PACKETS;
 1132                 sc->hwapi->pfnSetPacketFilter(sc->hwapi->pADCX, &hwfilter);
 1133                 return;
 1134         }
 1135         /* Setup multicast filter */
 1136         if_maddr_rlock(ifp);
 1137         TAILQ_FOREACH(ifma, &ifp->if_multiaddrs, ifma_link) {
 1138                 u_char *addrp;
 1139 
 1140                 if (ifma->ifma_addr->sa_family != AF_LINK)
 1141                         continue;
 1142 
 1143                 addrp = LLADDR((struct sockaddr_dl *) ifma->ifma_addr);
 1144                 for (i = 0; i < 6; i++) {
 1145                         u_int8_t mcaddr = addrp[i];
 1146                         andaddr[i] &= mcaddr;
 1147                         oraddr[i] |= mcaddr;
 1148                 }
 1149         }
 1150         if_maddr_runlock(ifp);
 1151         for (i = 0; i < 6; i++) {
 1152                 hwfilter.acMulticastAddress[i] = andaddr[i] & oraddr[i];
 1153                 hwfilter.acMulticastMask[i] = andaddr[i] | (~oraddr[i]);
 1154         }
 1155 
 1156         /* Send filter to NVIDIA API */
 1157         sc->hwapi->pfnSetPacketFilter(sc->hwapi->pADCX, &hwfilter);
 1158 
 1159         DEBUGOUT(NVE_DEBUG_RUNNING, "nve: nve_setmulti - exit\n");
 1160 
 1161         return;
 1162 }
 1163 
 1164 /* Change the current media/mediaopts */
 1165 static int
 1166 nve_ifmedia_upd(struct ifnet *ifp)
 1167 {
 1168         struct nve_softc *sc = ifp->if_softc;
 1169 
 1170         NVE_LOCK(sc);
 1171         nve_ifmedia_upd_locked(ifp);
 1172         NVE_UNLOCK(sc);
 1173         return (0);
 1174 }
 1175 
 1176 static void
 1177 nve_ifmedia_upd_locked(struct ifnet *ifp)
 1178 {
 1179         struct nve_softc *sc = ifp->if_softc;
 1180         struct mii_data *mii;
 1181 
 1182         DEBUGOUT(NVE_DEBUG_MII, "nve: nve_ifmedia_upd\n");
 1183 
 1184         NVE_LOCK_ASSERT(sc);
 1185         mii = device_get_softc(sc->miibus);
 1186 
 1187         if (mii->mii_instance) {
 1188                 struct mii_softc *miisc;
 1189                 for (miisc = LIST_FIRST(&mii->mii_phys); miisc != NULL;
 1190                     miisc = LIST_NEXT(miisc, mii_list)) {
 1191                         mii_phy_reset(miisc);
 1192                 }
 1193         }
 1194         mii_mediachg(mii);
 1195 }
 1196 
 1197 /* Update current miibus PHY status of media */
 1198 static void
 1199 nve_ifmedia_sts(struct ifnet *ifp, struct ifmediareq *ifmr)
 1200 {
 1201         struct nve_softc *sc;
 1202         struct mii_data *mii;
 1203 
 1204         DEBUGOUT(NVE_DEBUG_MII, "nve: nve_ifmedia_sts\n");
 1205 
 1206         sc = ifp->if_softc;
 1207         NVE_LOCK(sc);
 1208         mii = device_get_softc(sc->miibus);
 1209         mii_pollstat(mii);
 1210         NVE_UNLOCK(sc);
 1211 
 1212         ifmr->ifm_active = mii->mii_media_active;
 1213         ifmr->ifm_status = mii->mii_media_status;
 1214 
 1215         return;
 1216 }
 1217 
 1218 /* miibus tick timer - maintain link status */
 1219 static void
 1220 nve_tick(void *xsc)
 1221 {
 1222         struct nve_softc *sc = xsc;
 1223         struct mii_data *mii;
 1224         struct ifnet *ifp;
 1225 
 1226         NVE_LOCK_ASSERT(sc);
 1227 
 1228         ifp = sc->ifp;
 1229         nve_update_stats(sc);
 1230 
 1231         mii = device_get_softc(sc->miibus);
 1232         mii_tick(mii);
 1233 
 1234         if (mii->mii_media_status & IFM_ACTIVE &&
 1235             IFM_SUBTYPE(mii->mii_media_active) != IFM_NONE) {
 1236                 if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd))
 1237                         nve_ifstart_locked(ifp);
 1238         }
 1239         callout_reset(&sc->stat_callout, hz, nve_tick, sc);
 1240 
 1241         return;
 1242 }
 1243 
 1244 /* Update ifnet data structure with collected interface stats from API */
 1245 static void
 1246 nve_update_stats(struct nve_softc *sc)
 1247 {
 1248         struct ifnet *ifp = sc->ifp;
 1249         ADAPTER_STATS stats;
 1250 
 1251         NVE_LOCK_ASSERT(sc);
 1252 
 1253         if (sc->hwapi) {
 1254                 sc->hwapi->pfnGetStatistics(sc->hwapi->pADCX, &stats);
 1255 
 1256                 ifp->if_ipackets = stats.ulSuccessfulReceptions;
 1257                 ifp->if_ierrors = stats.ulMissedFrames +
 1258                         stats.ulFailedReceptions +
 1259                         stats.ulCRCErrors +
 1260                         stats.ulFramingErrors +
 1261                         stats.ulOverFlowErrors;
 1262 
 1263                 ifp->if_opackets = stats.ulSuccessfulTransmissions;
 1264                 ifp->if_oerrors = sc->tx_errors +
 1265                         stats.ulFailedTransmissions +
 1266                         stats.ulRetryErrors +
 1267                         stats.ulUnderflowErrors +
 1268                         stats.ulLossOfCarrierErrors +
 1269                         stats.ulLateCollisionErrors;
 1270 
 1271                 ifp->if_collisions = stats.ulLateCollisionErrors;
 1272         }
 1273 
 1274         return;
 1275 }
 1276 
 1277 /* miibus Read PHY register wrapper - calls Nvidia API entry point */
 1278 static int
 1279 nve_miibus_readreg(device_t dev, int phy, int reg)
 1280 {
 1281         struct nve_softc *sc = device_get_softc(dev);
 1282         ULONG data;
 1283 
 1284         DEBUGOUT(NVE_DEBUG_MII, "nve: nve_miibus_readreg - entry\n");
 1285 
 1286         ADAPTER_ReadPhy(sc->hwapi->pADCX, phy, reg, &data);
 1287 
 1288         DEBUGOUT(NVE_DEBUG_MII, "nve: nve_miibus_readreg - exit\n");
 1289 
 1290         return (data);
 1291 }
 1292 
 1293 /* miibus Write PHY register wrapper - calls Nvidia API entry point */
 1294 static int
 1295 nve_miibus_writereg(device_t dev, int phy, int reg, int data)
 1296 {
 1297         struct nve_softc *sc = device_get_softc(dev);
 1298 
 1299         DEBUGOUT(NVE_DEBUG_MII, "nve: nve_miibus_writereg - entry\n");
 1300 
 1301         ADAPTER_WritePhy(sc->hwapi->pADCX, phy, reg, (ulong)data);
 1302 
 1303         DEBUGOUT(NVE_DEBUG_MII, "nve: nve_miibus_writereg - exit\n");
 1304 
 1305         return 0;
 1306 }
 1307 
 1308 /* Watchdog timer to prevent PHY lockups */
 1309 static void
 1310 nve_watchdog(struct ifnet *ifp)
 1311 {
 1312         struct nve_softc *sc = ifp->if_softc;
 1313         int pending_txs_start;
 1314 
 1315         NVE_LOCK(sc);
 1316 
 1317         /*
 1318          * The nvidia driver blob defers tx completion notifications.
 1319          * Thus, sometimes the watchdog timer will go off when the
 1320          * tx engine is fine, but the tx completions are just deferred.
 1321          * Try kicking the driver blob to clear out any pending tx
 1322          * completions.  If that clears up any of the pending tx
 1323          * operations, then just return without printing the warning
 1324          * message or resetting the adapter, as we can then conclude
 1325          * the chip hasn't actually crashed (it's still sending packets).
 1326          */
 1327         pending_txs_start = sc->pending_txs;
 1328         sc->hwapi->pfnDisableInterrupts(sc->hwapi->pADCX);
 1329         sc->hwapi->pfnHandleInterrupt(sc->hwapi->pADCX);
 1330         sc->hwapi->pfnEnableInterrupts(sc->hwapi->pADCX);
 1331         if (sc->pending_txs < pending_txs_start) {
 1332                 NVE_UNLOCK(sc);
 1333                 return;
 1334         }
 1335 
 1336         device_printf(sc->dev, "device timeout (%d)\n", sc->pending_txs);
 1337 
 1338         sc->tx_errors++;
 1339 
 1340         nve_stop(sc);
 1341         ifp->if_drv_flags &= ~IFF_DRV_RUNNING;
 1342         nve_init_locked(sc);
 1343 
 1344         if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd))
 1345                 nve_ifstart_locked(ifp);
 1346         NVE_UNLOCK(sc);
 1347 
 1348         return;
 1349 }
 1350 
 1351 /* --- Start of NVOSAPI interface --- */
 1352 
 1353 /* Allocate DMA enabled general use memory for API */
 1354 static NV_SINT32
 1355 nve_osalloc(PNV_VOID ctx, PMEMORY_BLOCK mem)
 1356 {
 1357         struct nve_softc *sc;
 1358         bus_addr_t mem_physical;
 1359 
 1360         DEBUGOUT(NVE_DEBUG_API, "nve: nve_osalloc - %d\n", mem->uiLength);
 1361 
 1362         sc = (struct nve_softc *)ctx;
 1363 
 1364         mem->pLogical = (PVOID)contigmalloc(mem->uiLength, M_DEVBUF,
 1365             M_NOWAIT | M_ZERO, 0, 0xffffffff, PAGE_SIZE, 0);
 1366 
 1367         if (!mem->pLogical) {
 1368                 device_printf(sc->dev, "memory allocation failed\n");
 1369                 return (0);
 1370         }
 1371         memset(mem->pLogical, 0, (ulong)mem->uiLength);
 1372         mem_physical = vtophys(mem->pLogical);
 1373         mem->pPhysical = (PVOID)mem_physical;
 1374 
 1375         DEBUGOUT(NVE_DEBUG_API, "nve: nve_osalloc 0x%x/0x%x - %d\n",
 1376             (uint)mem->pLogical, (uint)mem->pPhysical, (uint)mem->uiLength);
 1377 
 1378         return (1);
 1379 }
 1380 
 1381 /* Free allocated memory */
 1382 static NV_SINT32
 1383 nve_osfree(PNV_VOID ctx, PMEMORY_BLOCK mem)
 1384 {
 1385         DEBUGOUT(NVE_DEBUG_API, "nve: nve_osfree - 0x%x - %d\n",
 1386             (uint)mem->pLogical, (uint) mem->uiLength);
 1387 
 1388         contigfree(mem->pLogical, PAGE_SIZE, M_DEVBUF);
 1389         return (1);
 1390 }
 1391 
 1392 /* Copied directly from nvnet.c */
 1393 static NV_SINT32
 1394 nve_osallocex(PNV_VOID ctx, PMEMORY_BLOCKEX mem_block_ex)
 1395 {
 1396         MEMORY_BLOCK mem_block;
 1397 
 1398         DEBUGOUT(NVE_DEBUG_API, "nve: nve_osallocex\n");
 1399 
 1400         mem_block_ex->pLogical = NULL;
 1401         mem_block_ex->uiLengthOrig = mem_block_ex->uiLength;
 1402 
 1403         if ((mem_block_ex->AllocFlags & ALLOC_MEMORY_ALIGNED) &&
 1404             (mem_block_ex->AlignmentSize > 1)) {
 1405                 DEBUGOUT(NVE_DEBUG_API, "     aligning on %d\n",
 1406                     mem_block_ex->AlignmentSize);
 1407                 mem_block_ex->uiLengthOrig += mem_block_ex->AlignmentSize;
 1408         }
 1409         mem_block.uiLength = mem_block_ex->uiLengthOrig;
 1410 
 1411         if (nve_osalloc(ctx, &mem_block) == 0) {
 1412                 return (0);
 1413         }
 1414         mem_block_ex->pLogicalOrig = mem_block.pLogical;
 1415         mem_block_ex->pPhysicalOrigLow = (unsigned long)mem_block.pPhysical;
 1416         mem_block_ex->pPhysicalOrigHigh = 0;
 1417 
 1418         mem_block_ex->pPhysical = mem_block.pPhysical;
 1419         mem_block_ex->pLogical = mem_block.pLogical;
 1420 
 1421         if (mem_block_ex->uiLength != mem_block_ex->uiLengthOrig) {
 1422                 unsigned int offset;
 1423                 offset = mem_block_ex->pPhysicalOrigLow &
 1424                     (mem_block_ex->AlignmentSize - 1);
 1425 
 1426                 if (offset) {
 1427                         mem_block_ex->pPhysical =
 1428                             (PVOID)((ulong)mem_block_ex->pPhysical +
 1429                             mem_block_ex->AlignmentSize - offset);
 1430                         mem_block_ex->pLogical =
 1431                             (PVOID)((ulong)mem_block_ex->pLogical +
 1432                             mem_block_ex->AlignmentSize - offset);
 1433                 } /* if (offset) */
 1434         } /* if (mem_block_ex->uiLength != *mem_block_ex->uiLengthOrig) */
 1435         return (1);
 1436 }
 1437 
 1438 /* Copied directly from nvnet.c */
 1439 static NV_SINT32
 1440 nve_osfreeex(PNV_VOID ctx, PMEMORY_BLOCKEX mem_block_ex)
 1441 {
 1442         MEMORY_BLOCK mem_block;
 1443 
 1444         DEBUGOUT(NVE_DEBUG_API, "nve: nve_osfreeex\n");
 1445 
 1446         mem_block.pLogical = mem_block_ex->pLogicalOrig;
 1447         mem_block.pPhysical = (PVOID)((ulong)mem_block_ex->pPhysicalOrigLow);
 1448         mem_block.uiLength = mem_block_ex->uiLengthOrig;
 1449 
 1450         return (nve_osfree(ctx, &mem_block));
 1451 }
 1452 
 1453 /* Clear memory region */
 1454 static NV_SINT32
 1455 nve_osclear(PNV_VOID ctx, PNV_VOID mem, NV_SINT32 length)
 1456 {
 1457         DEBUGOUT(NVE_DEBUG_API, "nve: nve_osclear\n");
 1458         memset(mem, 0, length);
 1459         return (1);
 1460 }
 1461 
 1462 /* Sleep for a tick */
 1463 static NV_SINT32
 1464 nve_osdelay(PNV_VOID ctx, NV_UINT32 usec)
 1465 {
 1466         DELAY(usec);
 1467         return (1);
 1468 }
 1469 
 1470 /* Allocate memory for rx buffer */
 1471 static NV_SINT32
 1472 nve_osallocrxbuf(PNV_VOID ctx, PMEMORY_BLOCK mem, PNV_VOID *id)
 1473 {
 1474         struct nve_softc *sc = ctx;
 1475         struct nve_rx_desc *desc;
 1476         struct nve_map_buffer *buf;
 1477         int error;
 1478 
 1479         if (device_is_attached(sc->dev))
 1480                 NVE_LOCK_ASSERT(sc);
 1481 
 1482         DEBUGOUT(NVE_DEBUG_API, "nve: nve_osallocrxbuf\n");
 1483 
 1484         if (sc->pending_rxs == RX_RING_SIZE) {
 1485                 device_printf(sc->dev, "rx ring buffer is full\n");
 1486                 goto fail;
 1487         }
 1488         desc = sc->rx_desc + sc->cur_rx;
 1489         buf = &desc->buf;
 1490 
 1491         if (buf->mbuf == NULL) {
 1492                 buf->mbuf = m_getcl(M_DONTWAIT, MT_DATA, M_PKTHDR);
 1493                 if (buf->mbuf == NULL) {
 1494                         device_printf(sc->dev, "failed to allocate memory\n");
 1495                         goto fail;
 1496                 }
 1497                 buf->mbuf->m_len = buf->mbuf->m_pkthdr.len = MCLBYTES;
 1498                 m_adj(buf->mbuf, ETHER_ALIGN);
 1499 
 1500                 error = bus_dmamap_load_mbuf(sc->mtag, buf->map, buf->mbuf,
 1501                     nve_dmamap_rx_cb, &desc->paddr, 0);
 1502                 if (error) {
 1503                         device_printf(sc->dev, "failed to dmamap mbuf\n");
 1504                         m_freem(buf->mbuf);
 1505                         buf->mbuf = NULL;
 1506                         goto fail;
 1507                 }
 1508                 bus_dmamap_sync(sc->mtag, buf->map, BUS_DMASYNC_PREREAD);
 1509                 desc->buflength = buf->mbuf->m_len;
 1510                 desc->vaddr = mtod(buf->mbuf, caddr_t);
 1511         }
 1512         sc->pending_rxs++;
 1513         sc->cur_rx = (sc->cur_rx + 1) % RX_RING_SIZE;
 1514 
 1515         mem->pLogical = (void *)desc->vaddr;
 1516         mem->pPhysical = (void *)desc->paddr;
 1517         mem->uiLength = desc->buflength;
 1518         *id = (void *)desc;
 1519 
 1520         return (1);
 1521         
 1522 fail:
 1523         return (0);
 1524 }
 1525 
 1526 /* Free the rx buffer */
 1527 static NV_SINT32
 1528 nve_osfreerxbuf(PNV_VOID ctx, PMEMORY_BLOCK mem, PNV_VOID id)
 1529 {
 1530         struct nve_softc *sc = ctx;
 1531         struct nve_rx_desc *desc;
 1532         struct nve_map_buffer *buf;
 1533 
 1534         DEBUGOUT(NVE_DEBUG_API, "nve: nve_osfreerxbuf\n");
 1535 
 1536         desc = (struct nve_rx_desc *) id;
 1537         buf = &desc->buf;
 1538 
 1539         if (buf->mbuf) {
 1540                 bus_dmamap_unload(sc->mtag, buf->map);
 1541                 bus_dmamap_destroy(sc->mtag, buf->map);
 1542                 m_freem(buf->mbuf);
 1543         }
 1544         sc->pending_rxs--;
 1545         buf->mbuf = NULL;
 1546 
 1547         return (1);
 1548 }
 1549 
 1550 /* This gets called by the Nvidia API after our TX packet has been sent */
 1551 static NV_SINT32
 1552 nve_ospackettx(PNV_VOID ctx, PNV_VOID id, NV_UINT32 success)
 1553 {
 1554         struct nve_softc *sc = ctx;
 1555         struct nve_map_buffer *buf;
 1556         struct nve_tx_desc *desc = (struct nve_tx_desc *) id;
 1557         struct ifnet *ifp;
 1558 
 1559         NVE_LOCK_ASSERT(sc);
 1560 
 1561         DEBUGOUT(NVE_DEBUG_API, "nve: nve_ospackettx\n");
 1562 
 1563         ifp = sc->ifp;
 1564         buf = &desc->buf;
 1565         sc->pending_txs--;
 1566 
 1567         /* Unload and free mbuf cluster */
 1568         if (buf->mbuf == NULL)
 1569                 goto fail;
 1570 
 1571         bus_dmamap_sync(sc->mtag, buf->map, BUS_DMASYNC_POSTWRITE);
 1572         bus_dmamap_unload(sc->mtag, buf->map);
 1573         m_freem(buf->mbuf);
 1574         buf->mbuf = NULL;
 1575 
 1576         /* Send more packets if we have them */
 1577         if (sc->pending_txs < TX_RING_SIZE)
 1578                 sc->ifp->if_drv_flags &= ~IFF_DRV_OACTIVE;
 1579 
 1580         if (!IFQ_DRV_IS_EMPTY(&ifp->if_snd) && sc->pending_txs < TX_RING_SIZE)
 1581                 nve_ifstart_locked(ifp);
 1582 
 1583 fail:
 1584 
 1585         return (1);
 1586 }
 1587 
 1588 /* This gets called by the Nvidia API when a new packet has been received */
 1589 /* XXX What is newbuf used for? XXX */
 1590 static NV_SINT32
 1591 nve_ospacketrx(PNV_VOID ctx, PNV_VOID data, NV_UINT32 success, NV_UINT8 *newbuf,
 1592     NV_UINT8 priority)
 1593 {
 1594         struct nve_softc *sc = ctx;
 1595         struct ifnet *ifp;
 1596         struct nve_rx_desc *desc;
 1597         struct nve_map_buffer *buf;
 1598         ADAPTER_READ_DATA *readdata;
 1599         struct mbuf *m;
 1600 
 1601         NVE_LOCK_ASSERT(sc);
 1602 
 1603         DEBUGOUT(NVE_DEBUG_API, "nve: nve_ospacketrx\n");
 1604 
 1605         ifp = sc->ifp;
 1606 
 1607         readdata = (ADAPTER_READ_DATA *) data;
 1608         desc = readdata->pvID;
 1609         buf = &desc->buf;
 1610         bus_dmamap_sync(sc->mtag, buf->map, BUS_DMASYNC_POSTREAD);
 1611 
 1612         if (success) {
 1613                 /* Sync DMA bounce buffer. */
 1614                 bus_dmamap_sync(sc->mtag, buf->map, BUS_DMASYNC_POSTREAD);
 1615 
 1616                 /* First mbuf in packet holds the ethernet and packet headers */
 1617                 buf->mbuf->m_pkthdr.rcvif = ifp;
 1618                 buf->mbuf->m_pkthdr.len = buf->mbuf->m_len =
 1619                     readdata->ulTotalLength;
 1620 
 1621                 bus_dmamap_unload(sc->mtag, buf->map);
 1622 
 1623                 /* Blat the mbuf pointer, kernel will free the mbuf cluster */
 1624                 m = buf->mbuf;
 1625                 buf->mbuf = NULL;
 1626 
 1627                 /* Give mbuf to OS. */
 1628                 NVE_UNLOCK(sc);
 1629                 (*ifp->if_input)(ifp, m);
 1630                 NVE_LOCK(sc);
 1631                 if (readdata->ulFilterMatch & ADREADFL_MULTICAST_MATCH)
 1632                         ifp->if_imcasts++;
 1633 
 1634         } else {
 1635                 bus_dmamap_sync(sc->mtag, buf->map, BUS_DMASYNC_POSTREAD);
 1636                 bus_dmamap_unload(sc->mtag, buf->map);
 1637                 m_freem(buf->mbuf);
 1638                 buf->mbuf = NULL;
 1639         }
 1640 
 1641         sc->cur_rx = desc - sc->rx_desc;
 1642         sc->pending_rxs--;
 1643 
 1644         return (1);
 1645 }
 1646 
 1647 /* This gets called by NVIDIA API when the PHY link state changes */
 1648 static NV_SINT32
 1649 nve_oslinkchg(PNV_VOID ctx, NV_SINT32 enabled)
 1650 {
 1651 
 1652         DEBUGOUT(NVE_DEBUG_API, "nve: nve_oslinkchg\n");
 1653 
 1654         return (1);
 1655 }
 1656 
 1657 /* Setup a watchdog timer */
 1658 static NV_SINT32
 1659 nve_osalloctimer(PNV_VOID ctx, PNV_VOID *timer)
 1660 {
 1661         struct nve_softc *sc = (struct nve_softc *)ctx;
 1662 
 1663         DEBUGOUT(NVE_DEBUG_BROKEN, "nve: nve_osalloctimer\n");
 1664 
 1665         callout_init(&sc->ostimer, CALLOUT_MPSAFE);
 1666         *timer = &sc->ostimer;
 1667 
 1668         return (1);
 1669 }
 1670 
 1671 /* Free the timer */
 1672 static NV_SINT32
 1673 nve_osfreetimer(PNV_VOID ctx, PNV_VOID timer)
 1674 {
 1675 
 1676         DEBUGOUT(NVE_DEBUG_BROKEN, "nve: nve_osfreetimer\n");
 1677 
 1678         callout_drain((struct callout *)timer);
 1679 
 1680         return (1);
 1681 }
 1682 
 1683 /* Setup timer parameters */
 1684 static NV_SINT32
 1685 nve_osinittimer(PNV_VOID ctx, PNV_VOID timer, PTIMER_FUNC func, PNV_VOID parameters)
 1686 {
 1687         struct nve_softc *sc = (struct nve_softc *)ctx;
 1688 
 1689         DEBUGOUT(NVE_DEBUG_BROKEN, "nve: nve_osinittimer\n");
 1690 
 1691         sc->ostimer_func = func;
 1692         sc->ostimer_params = parameters;
 1693 
 1694         return (1);
 1695 }
 1696 
 1697 /* Set the timer to go off */
 1698 static NV_SINT32
 1699 nve_ossettimer(PNV_VOID ctx, PNV_VOID timer, NV_UINT32 delay)
 1700 {
 1701         struct nve_softc *sc = ctx;
 1702 
 1703         DEBUGOUT(NVE_DEBUG_BROKEN, "nve: nve_ossettimer\n");
 1704 
 1705         callout_reset((struct callout *)timer, delay, sc->ostimer_func,
 1706             sc->ostimer_params);
 1707 
 1708         return (1);
 1709 }
 1710 
 1711 /* Cancel the timer */
 1712 static NV_SINT32
 1713 nve_oscanceltimer(PNV_VOID ctx, PNV_VOID timer)
 1714 {
 1715 
 1716         DEBUGOUT(NVE_DEBUG_BROKEN, "nve: nve_oscanceltimer\n");
 1717 
 1718         callout_stop((struct callout *)timer);
 1719 
 1720         return (1);
 1721 }
 1722 
 1723 static NV_SINT32
 1724 nve_ospreprocpkt(PNV_VOID ctx, PNV_VOID readdata, PNV_VOID *id,
 1725     NV_UINT8 *newbuffer, NV_UINT8 priority)
 1726 {
 1727 
 1728         /* Not implemented */
 1729         DEBUGOUT(NVE_DEBUG_BROKEN, "nve: nve_ospreprocpkt\n");
 1730 
 1731         return (1);
 1732 }
 1733 
 1734 static PNV_VOID
 1735 nve_ospreprocpktnopq(PNV_VOID ctx, PNV_VOID readdata)
 1736 {
 1737 
 1738         /* Not implemented */
 1739         DEBUGOUT(NVE_DEBUG_BROKEN, "nve: nve_ospreprocpkt\n");
 1740 
 1741         return (NULL);
 1742 }
 1743 
 1744 static NV_SINT32
 1745 nve_osindicatepkt(PNV_VOID ctx, PNV_VOID *id, NV_UINT32 pktno)
 1746 {
 1747 
 1748         /* Not implemented */
 1749         DEBUGOUT(NVE_DEBUG_BROKEN, "nve: nve_osindicatepkt\n");
 1750 
 1751         return (1);
 1752 }
 1753 
 1754 /* Allocate mutex context (already done in nve_attach) */
 1755 static NV_SINT32
 1756 nve_oslockalloc(PNV_VOID ctx, NV_SINT32 type, PNV_VOID *pLock)
 1757 {
 1758         struct nve_softc *sc = (struct nve_softc *)ctx;
 1759 
 1760         DEBUGOUT(NVE_DEBUG_LOCK, "nve: nve_oslockalloc\n");
 1761 
 1762         *pLock = (void **)sc;
 1763 
 1764         return (1);
 1765 }
 1766 
 1767 /* Obtain a spin lock */
 1768 static NV_SINT32
 1769 nve_oslockacquire(PNV_VOID ctx, NV_SINT32 type, PNV_VOID lock)
 1770 {
 1771 
 1772         DEBUGOUT(NVE_DEBUG_LOCK, "nve: nve_oslockacquire\n");
 1773 
 1774         return (1);
 1775 }
 1776 
 1777 /* Release lock */
 1778 static NV_SINT32
 1779 nve_oslockrelease(PNV_VOID ctx, NV_SINT32 type, PNV_VOID lock)
 1780 {
 1781 
 1782         DEBUGOUT(NVE_DEBUG_LOCK, "nve: nve_oslockrelease\n");
 1783 
 1784         return (1);
 1785 }
 1786 
 1787 /* I have no idea what this is for */
 1788 static PNV_VOID
 1789 nve_osreturnbufvirt(PNV_VOID ctx, PNV_VOID readdata)
 1790 {
 1791 
 1792         /* Not implemented */
 1793         DEBUGOUT(NVE_DEBUG_LOCK, "nve: nve_osreturnbufvirt\n");
 1794         panic("nve: nve_osreturnbufvirtual not implemented\n");
 1795 
 1796         return (NULL);
 1797 }
 1798 
 1799 /* --- End on NVOSAPI interface --- */

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