if_lnc_pci.c

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    1 /*
    2  * Copyright (c) 1994-2000
    3  *      Paul Richards. All rights reserved.
    4  *
    5  * Redistribution and use in source and binary forms, with or without
    6  * modification, are permitted provided that the following conditions
    7  * are met:
    8  * 1. Redistributions of source code must retain the above copyright
    9  *    notice, this list of conditions and the following disclaimer,
   10  *    verbatim and that no modifications are made prior to this
   11  *    point in the file.
   12  * 2. Redistributions in binary form must reproduce the above copyright
   13  *    notice, this list of conditions and the following disclaimer in the
   14  *    documentation and/or other materials provided with the distribution.
   15  * 3. The name Paul Richards may not be used to endorse or promote products
   16  *    derived from this software without specific prior written permission.
   17  *
   18  * THIS SOFTWARE IS PROVIDED BY PAUL RICHARDS ``AS IS'' AND
   19  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   20  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   21  * ARE DISCLAIMED.  IN NO EVENT SHALL PAUL RICHARDS BE LIABLE
   22  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   23  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   24  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   25  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   26  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   27  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   28  * SUCH DAMAGE.
   29  *
   30  * $FreeBSD: releng/5.0/sys/dev/lnc/if_lnc_pci.c 106937 2002-11-14 23:54:55Z sam $
   31  */
   32 
   33 #include <sys/param.h>
   34 #include <sys/systm.h>
   35 #include <sys/socket.h>
   36 #include <sys/malloc.h>
   37 #include <sys/kernel.h>
   38 
   39 #include <machine/bus.h>
   40 #include <machine/resource.h>
   41 #include <sys/bus.h>
   42 #include <sys/rman.h>
   43 
   44 #include <net/ethernet.h>
   45 #include <net/if.h>
   46 #include <net/if_arp.h>
   47 
   48 #include <pci/pcireg.h>
   49 #include <pci/pcivar.h>
   50 
   51 #include <dev/lnc/if_lncreg.h>
   52 #include <dev/lnc/if_lncvar.h>
   53 
   54 #define AMD_VENDOR_ID 0x1022
   55 #define PCI_DEVICE_ID_PCNet_PCI 0x2000
   56 #define PCI_DEVICE_ID_PCHome_PCI 0x2001
   57 
   58 #define LNC_PROBE_PRIORITY -1
   59 
   60 static int
   61 lnc_pci_probe(device_t dev)
   62 {
   63         if (pci_get_vendor(dev) != AMD_VENDOR_ID)
   64                 return (ENXIO);
   65 
   66         switch(pci_get_device(dev)) {
   67         case PCI_DEVICE_ID_PCNet_PCI:
   68                 device_set_desc(dev, "PCNet/PCI Ethernet adapter");
   69                 return(LNC_PROBE_PRIORITY);
   70                 break;
   71         case PCI_DEVICE_ID_PCHome_PCI:
   72                 device_set_desc(dev, "PCHome/PCI Ethernet adapter");
   73                 return(LNC_PROBE_PRIORITY);
   74                 break;
   75         default:
   76                 return (ENXIO);
   77                 break;
   78         }
   79         return (ENXIO);
   80 }
   81 
   82 static void
   83 lnc_alloc_callback(void *arg, bus_dma_segment_t *seg, int nseg, int error)
   84 {
   85         /* Do nothing */
   86         return;
   87 }
   88 
   89 static int
   90 lnc_pci_attach(device_t dev)
   91 {
   92         lnc_softc_t *sc = device_get_softc(dev);
   93         unsigned command;
   94         int rid = 0;
   95         int err = 0;
   96         bus_size_t lnc_mem_size;
   97 
   98         device_printf(dev, "Attaching %s\n", device_get_desc(dev));
   99 
  100         command = pci_read_config(dev, PCIR_COMMAND, 4);
  101         command |= PCIM_CMD_PORTEN | PCIM_CMD_BUSMASTEREN;
  102         pci_write_config(dev, PCIR_COMMAND, command, 4);
  103 
  104         rid = PCIR_MAPS;
  105         sc->portres = bus_alloc_resource(dev, SYS_RES_IOPORT, &rid, 0, ~0, 1,
  106                                          RF_ACTIVE);
  107 
  108         if (! sc->portres)
  109                 device_printf(dev, "Cannot allocate I/O ports\n");
  110 
  111         rid = 0;
  112         sc->irqres = bus_alloc_resource(dev, SYS_RES_IRQ, &rid, 0, ~0, 1,
  113                                         RF_ACTIVE|RF_SHAREABLE);
  114 
  115         if (! sc->irqres)
  116                 device_printf(dev, "Cannot allocate irq\n");
  117 
  118         err = bus_setup_intr(dev, sc->irqres, INTR_TYPE_NET, lncintr,
  119                              sc, &sc->intrhand);
  120         if (err)
  121                 device_printf(dev, "Cannot setup irq handler\n");
  122 
  123         sc->lnc_btag = rman_get_bustag(sc->portres);
  124         sc->lnc_bhandle = rman_get_bushandle(sc->portres);
  125 
  126         /* XXX temp setting for nic */
  127         sc->nic.ic = PCnet_PCI;
  128         sc->nic.ident = NE2100;
  129         sc->nic.mem_mode = DMA_FIXED;
  130         sc->nrdre  = NRDRE;
  131         sc->ntdre  = NTDRE;
  132         sc->rap = PCNET_RAP;
  133         sc->rdp = PCNET_RDP;
  134         sc->bdp = PCNET_BDP;
  135 
  136         /* Create a DMA tag describing the ring memory we need */
  137 
  138         lnc_mem_size = ((NDESC(sc->nrdre) + NDESC(sc->ntdre)) *
  139                          sizeof(struct host_ring_entry));
  140 
  141         lnc_mem_size += sizeof(struct init_block) + (sizeof(struct mds) *
  142                         (NDESC(sc->nrdre) + NDESC(sc->ntdre))) + MEM_SLEW;
  143 
  144         lnc_mem_size += (NDESC(sc->nrdre) * RECVBUFSIZE) +
  145                         (NDESC(sc->ntdre) * TRANSBUFSIZE);
  146 
  147         err = bus_dma_tag_create(NULL,                  /* parent */
  148                                  1,                     /* alignement */
  149                                  0,                     /* boundary */
  150                                  BUS_SPACE_MAXADDR,     /* lowaddr */
  151                                  BUS_SPACE_MAXADDR,     /* highaddr */
  152                                  NULL, NULL,            /* filter, filterarg */
  153                                  lnc_mem_size,          /* segsize */
  154                                  1,                     /* nsegments */
  155                                  BUS_SPACE_MAXSIZE_32BIT,       /* maxsegsize */
  156                                  0,                     /* flags */
  157                                  &sc->dmat);
  158 
  159         if (err) {
  160                 device_printf(dev, "Can't create DMA tag\n");
  161                 /* XXX need to free currently allocated resources here */
  162                 return (ENOMEM);
  163         }
  164 
  165         err = bus_dmamem_alloc(sc->dmat, (void **)&sc->recv_ring,
  166                                BUS_DMA_NOWAIT, &sc->dmamap);
  167 
  168         if (err) {
  169                 device_printf(dev, "Couldn't allocate memory\n");
  170                 /* XXX need to free currently allocated resources here */
  171                 return (ENOMEM);
  172         }
  173 
  174         bus_dmamap_load(sc->dmat, sc->dmamap, sc->recv_ring, lnc_mem_size,
  175                         lnc_alloc_callback, sc->recv_ring, BUS_DMA_NOWAIT);
  176 
  177         /* Call generic attach code */
  178         if (! lnc_attach_common(dev)) {
  179                 device_printf(dev, "Generic attach code failed\n");
  180         }
  181         return (0);
  182 }
  183 
  184 static int
  185 lnc_pci_detach(device_t dev)
  186 {
  187         lnc_softc_t *sc = device_get_softc(dev);
  188         int s = splimp();
  189 
  190         ether_ifdetach(&sc->arpcom.ac_if);
  191 
  192         lnc_stop(sc);
  193         bus_teardown_intr(dev, sc->irqres, sc->intrhand);
  194         bus_release_resource(dev, SYS_RES_IRQ, 0, sc->irqres);
  195         bus_release_resource(dev, SYS_RES_IOPORT, PCIR_MAPS, sc->portres);
  196 
  197         bus_dmamap_unload(sc->dmat, sc->dmamap);
  198         bus_dmamem_free(sc->dmat, sc->recv_ring, sc->dmamap);
  199         bus_dma_tag_destroy(sc->dmat);
  200 
  201         splx(s);
  202         return (0);
  203 }
  204 
  205 static device_method_t lnc_pci_methods[] = {
  206         DEVMETHOD(device_probe,         lnc_pci_probe),
  207         DEVMETHOD(device_attach,        lnc_pci_attach),
  208         DEVMETHOD(device_detach,        lnc_pci_detach),
  209 #ifdef notyet
  210         DEVMETHOD(device_suspend,       lnc_pci_suspend),
  211         DEVMETHOD(device_resume,        lnc_pci_resume),
  212         DEVMETHOD(device_shutdown,      lnc_pci_shutdown),
  213 #endif
  214         { 0, 0 }
  215 };
  216 
  217 static driver_t lnc_pci_driver = {
  218         "lnc",
  219         lnc_pci_methods,
  220         sizeof(struct lnc_softc),
  221 };
  222 
  223 DRIVER_MODULE(if_lnc, pci, lnc_pci_driver, lnc_devclass, 0, 0);

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FreeBSD/Linux Kernel Cross Reference sys/dev/lnc/if_lnc_pci.c

FreeBSD/Linux Kernel Cross Reference
sys/dev/lnc/if_lnc_pci.c