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/an/if_an_pci.c

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    1 /*-
    2  * SPDX-License-Identifier: BSD-4-Clause
    3  *
    4  * Copyright (c) 1997, 1998, 1999
    5  *      Bill Paul <wpaul@ctr.columbia.edu>.  All rights reserved.
    6  *
    7  * Redistribution and use in source and binary forms, with or without
    8  * modification, are permitted provided that the following conditions
    9  * are met:
   10  * 1. Redistributions of source code must retain the above copyright
   11  *    notice, this list of conditions and the following disclaimer.
   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. All advertising materials mentioning features or use of this software
   16  *    must display the following acknowledgement:
   17  *      This product includes software developed by Bill Paul.
   18  * 4. Neither the name of the author nor the names of any co-contributors
   19  *    may be used to endorse or promote products derived from this software
   20  *    without specific prior written permission.
   21  *
   22  * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
   23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   25  * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
   26  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
   27  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
   28  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
   29  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
   30  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
   31  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
   32  * THE POSSIBILITY OF SUCH DAMAGE.
   33  */
   34 
   35 #include <sys/cdefs.h>
   36 __FBSDID("$FreeBSD: releng/12.0/sys/dev/an/if_an_pci.c 338948 2018-09-26 17:12:14Z imp $");
   37 
   38 /*
   39  * This is a PCI shim for the Aironet PC4500/4800 wireless network
   40  * driver. Aironet makes PCMCIA, ISA and PCI versions of these devices,
   41  * which all have basically the same interface. The ISA and PCI cards
   42  * are actually bridge adapters with PCMCIA cards inserted into them,
   43  * however they appear as normal PCI or ISA devices to the host.
   44  *
   45  * All we do here is handle the PCI probe and attach and set up an
   46  * interrupt handler entry point. The PCI version of the card uses
   47  * a PLX 9050 PCI to "dumb bus" bridge chip, which provides us with
   48  * multiple PCI address space mappings. The primary mapping at PCI
   49  * register 0x14 is for the PLX chip itself, *NOT* the Aironet card.
   50  * The I/O address of the Aironet is actually at register 0x18, which
   51  * is the local bus mapping register for bus space 0. There are also
   52  * registers for additional register spaces at registers 0x1C and
   53  * 0x20, but these are unused in the Aironet devices. To find out
   54  * more, you need a datasheet for the 9050 from PLX, but you have
   55  * to go through their sales office to get it. Bleh.
   56  */
   57 
   58 #include "opt_inet.h"
   59 
   60 #ifdef INET
   61 #define ANCACHE
   62 #endif
   63 
   64 #include <sys/param.h>
   65 #include <sys/systm.h>
   66 #include <sys/sockio.h>
   67 #include <sys/mbuf.h>
   68 #include <sys/kernel.h>
   69 #include <sys/socket.h>
   70 
   71 #include <sys/module.h>
   72 #include <sys/bus.h>
   73 #include <machine/bus.h>
   74 #include <sys/rman.h>
   75 #include <sys/lock.h>
   76 #include <sys/mutex.h>
   77 #include <machine/resource.h>
   78 
   79 #include <net/if.h>
   80 #include <net/if_arp.h>
   81 #include <net/ethernet.h>
   82 #include <net/if_dl.h>
   83 #include <net/if_media.h>
   84 
   85 #include <dev/pci/pcireg.h>
   86 #include <dev/pci/pcivar.h>
   87 
   88 #include <dev/an/if_aironet_ieee.h>
   89 #include <dev/an/if_anreg.h>
   90 
   91 struct an_type {
   92         u_int16_t               an_vid;
   93         u_int16_t               an_did;
   94         char                    *an_name;
   95 };
   96 
   97 #define AIRONET_VENDORID        0x14B9
   98 #define AIRONET_DEVICEID_35x    0x0350
   99 #define AIRONET_DEVICEID_4500   0x4500
  100 #define AIRONET_DEVICEID_4800   0x4800
  101 #define AIRONET_DEVICEID_4xxx   0x0001
  102 #define AIRONET_DEVICEID_MPI350 0xA504
  103 #define AN_PCI_PLX_LOIO         0x14    /* PLX chip iobase */
  104 #define AN_PCI_LOIO             0x18    /* Aironet iobase */
  105 
  106 static struct an_type an_devs[] = {
  107         { AIRONET_VENDORID, AIRONET_DEVICEID_35x, "Cisco Aironet 350 Series" },
  108         { AIRONET_VENDORID, AIRONET_DEVICEID_MPI350, "Cisco Aironet MPI350" },
  109         { AIRONET_VENDORID, AIRONET_DEVICEID_4500, "Aironet PCI4500" },
  110         { AIRONET_VENDORID, AIRONET_DEVICEID_4800, "Aironet PCI4800" },
  111         { AIRONET_VENDORID, AIRONET_DEVICEID_4xxx, "Aironet PCI4500/PCI4800" },
  112         { 0, 0, NULL }
  113 };
  114 
  115 static int an_probe_pci         (device_t);
  116 static int an_attach_pci        (device_t);
  117 static int an_suspend_pci       (device_t);
  118 static int an_resume_pci        (device_t);
  119 
  120 static int
  121 an_probe_pci(device_t dev)
  122 {
  123         struct an_type          *t;
  124         uint16_t vid, did;
  125 
  126         t = an_devs;
  127         vid = pci_get_vendor(dev);
  128         did = pci_get_device(dev);
  129 
  130         while (t->an_name != NULL) {
  131                 if (vid == t->an_vid &&
  132                     did == t->an_did) {
  133                         device_set_desc(dev, t->an_name);
  134                         return(BUS_PROBE_DEFAULT);
  135                 }
  136                 t++;
  137         }
  138 
  139         return(ENXIO);
  140 }
  141 
  142 static int
  143 an_attach_pci(dev)
  144         device_t                dev;
  145 {
  146         struct an_softc         *sc;
  147         int                     flags, error = 0;
  148 
  149         sc = device_get_softc(dev);
  150         bzero(sc, sizeof(struct an_softc));
  151         flags = device_get_flags(dev);
  152 
  153         /*
  154          * Setup the lock in PCI attachment since it skips the an_probe
  155          * function.
  156          */
  157         mtx_init(&sc->an_mtx, device_get_nameunit(dev), MTX_NETWORK_LOCK,
  158             MTX_DEF);
  159 
  160         if (pci_get_vendor(dev) == AIRONET_VENDORID &&
  161             pci_get_device(dev) == AIRONET_DEVICEID_MPI350) {
  162                 sc->mpi350 = 1;
  163                 sc->port_rid = PCIR_BAR(0);
  164         } else {
  165                 sc->port_rid = AN_PCI_LOIO;
  166         }
  167         error = an_alloc_port(dev, sc->port_rid, 1);
  168 
  169         if (error) {
  170                 device_printf(dev, "couldn't map ports\n");
  171                 goto fail;
  172         }
  173 
  174         /* Allocate memory for MPI350 */
  175         if (sc->mpi350) {
  176                 /* Allocate memory */
  177                 sc->mem_rid = PCIR_BAR(1);
  178                 error = an_alloc_memory(dev, sc->mem_rid, 1);
  179                 if (error) {
  180                         device_printf(dev, "couldn't map memory\n");
  181                         goto fail;
  182                 }
  183 
  184                 /* Allocate aux. memory */
  185                 sc->mem_aux_rid = PCIR_BAR(2);
  186                 error = an_alloc_aux_memory(dev, sc->mem_aux_rid, 
  187                     AN_AUX_MEM_SIZE);
  188                 if (error) {
  189                         device_printf(dev, "couldn't map aux memory\n");
  190                         goto fail;
  191                 }
  192 
  193                 /* Allocate DMA region */
  194                 error = bus_dma_tag_create(bus_get_dma_tag(dev),/* parent */
  195                                1, 0,                    /* alignment, bounds */
  196                                BUS_SPACE_MAXADDR_32BIT, /* lowaddr */
  197                                BUS_SPACE_MAXADDR,       /* highaddr */
  198                                NULL, NULL,              /* filter, filterarg */
  199                                0x3ffff,                 /* maxsize XXX */
  200                                1,                       /* nsegments */
  201                                0xffff,                  /* maxsegsize XXX */
  202                                BUS_DMA_ALLOCNOW,        /* flags */
  203                                NULL,                    /* lockfunc */
  204                                NULL,                    /* lockarg */
  205                                &sc->an_dtag);
  206                 if (error) {
  207                         device_printf(dev, "couldn't get DMA region\n");
  208                         goto fail;
  209                 }
  210         }
  211 
  212         /* Allocate interrupt */
  213         error = an_alloc_irq(dev, 0, RF_SHAREABLE);
  214         if (error) {
  215                 device_printf(dev, "couldn't get interrupt\n");
  216                 goto fail;
  217         }
  218 
  219         sc->an_dev = dev;
  220         error = an_attach(sc, flags);
  221         if (error) {
  222                 device_printf(dev, "couldn't attach\n");
  223                 goto fail;
  224         }
  225 
  226         /*
  227          * Must setup the interrupt after the an_attach to prevent racing.
  228          */
  229         error = bus_setup_intr(dev, sc->irq_res, INTR_TYPE_NET,
  230             NULL, an_intr, sc, &sc->irq_handle);
  231         if (error)
  232                 device_printf(dev, "couldn't setup interrupt\n");
  233 
  234 fail:
  235         if (error)
  236                 an_release_resources(dev);
  237         return(error);
  238 }
  239 
  240 static int
  241 an_suspend_pci(device_t dev)
  242 {
  243         an_shutdown(dev);
  244         
  245         return (0);
  246 }
  247 
  248 static int
  249 an_resume_pci(device_t dev)
  250 {
  251         an_resume(dev);
  252 
  253         return (0);
  254 }
  255 
  256 static device_method_t an_pci_methods[] = {
  257         /* Device interface */
  258         DEVMETHOD(device_probe,         an_probe_pci),
  259         DEVMETHOD(device_attach,        an_attach_pci),
  260         DEVMETHOD(device_detach,        an_detach),
  261         DEVMETHOD(device_shutdown,      an_shutdown),
  262         DEVMETHOD(device_suspend,       an_suspend_pci),
  263         DEVMETHOD(device_resume,        an_resume_pci),
  264         { 0, 0 }
  265 };
  266 
  267 static driver_t an_pci_driver = {
  268         "an",
  269         an_pci_methods,
  270         sizeof(struct an_softc),
  271 };
  272 
  273 static devclass_t an_devclass;
  274 
  275 DRIVER_MODULE(an, pci, an_pci_driver, an_devclass, 0, 0);
  276 MODULE_PNP_INFO("U16:vendor;U16:device;D:#", pci, an,
  277     an_devs, nitems(an_devs) - 1);
  278 MODULE_DEPEND(an, pci, 1, 1, 1);
  279 MODULE_DEPEND(an, wlan, 1, 1, 1);

Cache object: c412cebf95e41db14e9155fbbdeda3d4


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