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


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]

FreeBSD/Linux Kernel Cross Reference
sys/dev/pci/isa_pci.c

Version: -  FREEBSD  -  FREEBSD-13-STABLE  -  FREEBSD-13-0  -  FREEBSD-12-STABLE  -  FREEBSD-12-0  -  FREEBSD-11-STABLE  -  FREEBSD-11-0  -  FREEBSD-10-STABLE  -  FREEBSD-10-0  -  FREEBSD-9-STABLE  -  FREEBSD-9-0  -  FREEBSD-8-STABLE  -  FREEBSD-8-0  -  FREEBSD-7-STABLE  -  FREEBSD-7-0  -  FREEBSD-6-STABLE  -  FREEBSD-6-0  -  FREEBSD-5-STABLE  -  FREEBSD-5-0  -  FREEBSD-4-STABLE  -  FREEBSD-3-STABLE  -  FREEBSD22  -  l41  -  OPENBSD  -  linux-2.6  -  MK84  -  PLAN9  -  xnu-8792 
SearchContext: -  none  -  3  -  10 

    1 /*-
    2  * Copyright (c) 1994,1995 Stefan Esser, Wolfgang StanglMeier
    3  * Copyright (c) 2000 Michael Smith <msmith@freebsd.org>
    4  * Copyright (c) 2000 BSDi
    5  * 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. The name of the author 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 THE AUTHOR AND CONTRIBUTORS ``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 THE AUTHOR OR CONTRIBUTORS 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 
   31 #include <sys/cdefs.h>
   32 __FBSDID("$FreeBSD: releng/11.2/sys/dev/pci/isa_pci.c 331722 2018-03-29 02:50:57Z eadler $");
   33 
   34 /*
   35  * PCI:ISA bridge support
   36  */
   37 
   38 #include <sys/param.h>
   39 #include <sys/systm.h>
   40 #include <sys/kernel.h>
   41 #include <sys/module.h>
   42 #include <sys/bus.h>
   43 
   44 #include <isa/isavar.h>
   45 #include <dev/pci/pcivar.h>
   46 #include <dev/pci/pcireg.h>
   47 
   48 #include <machine/bus.h>
   49 #include <sys/rman.h>
   50 #include <machine/resource.h>
   51 
   52 static int      isab_pci_probe(device_t dev);
   53 static int      isab_pci_attach(device_t dev);
   54 static struct resource *        isab_pci_alloc_resource(device_t dev,
   55     device_t child, int type, int *rid, rman_res_t start, rman_res_t end,
   56     rman_res_t count, u_int flags);
   57 static int      isab_pci_release_resource(device_t dev, device_t child,
   58     int type, int rid, struct resource *r);
   59 
   60 static device_method_t isab_methods[] = {
   61     /* Device interface */
   62     DEVMETHOD(device_probe,             isab_pci_probe),
   63     DEVMETHOD(device_attach,            isab_pci_attach),
   64     DEVMETHOD(device_detach,            bus_generic_detach),
   65     DEVMETHOD(device_shutdown,          bus_generic_shutdown),
   66     DEVMETHOD(device_suspend,           bus_generic_suspend),
   67     DEVMETHOD(device_resume,            bus_generic_resume),
   68 
   69     /* Bus interface */
   70     DEVMETHOD(bus_add_child,            bus_generic_add_child),
   71     DEVMETHOD(bus_alloc_resource,       isab_pci_alloc_resource),
   72     DEVMETHOD(bus_release_resource,     isab_pci_release_resource),
   73     DEVMETHOD(bus_activate_resource,    bus_generic_activate_resource),
   74     DEVMETHOD(bus_deactivate_resource,  bus_generic_deactivate_resource),
   75     DEVMETHOD(bus_setup_intr,           bus_generic_setup_intr),
   76     DEVMETHOD(bus_teardown_intr,        bus_generic_teardown_intr),
   77 
   78     DEVMETHOD_END
   79 };
   80 
   81 struct isab_pci_resource {
   82         struct resource *ip_res;
   83         int     ip_refs;
   84 };
   85 
   86 struct isab_pci_softc {
   87         struct isab_pci_resource isab_pci_res[PCIR_MAX_BAR_0 + 1];
   88 };
   89 
   90 static driver_t isab_driver = {
   91     "isab",
   92     isab_methods,
   93     sizeof(struct isab_pci_softc),
   94 };
   95 
   96 DRIVER_MODULE(isab, pci, isab_driver, isab_devclass, 0, 0);
   97 
   98 /*
   99  * XXX we need to add a quirk list here for bridges that don't correctly
  100  *     report themselves.
  101  */
  102 static int
  103 isab_pci_probe(device_t dev)
  104 {
  105     int         matched = 0;
  106 
  107     /*
  108      * Try for a generic match based on class/subclass.
  109      */
  110     if ((pci_get_class(dev) == PCIC_BRIDGE) &&
  111         (pci_get_subclass(dev) == PCIS_BRIDGE_ISA)) {
  112         matched = 1;
  113     } else {
  114         /*
  115          * These are devices that we *know* are PCI:ISA bridges. 
  116          * Sometimes, however, they don't report themselves as
  117          * such.  Check in case one of them is pretending to be
  118          * something else.
  119          */
  120         switch (pci_get_devid(dev)) {
  121         case 0x04848086:        /* Intel 82378ZB/82378IB */
  122         case 0x122e8086:        /* Intel 82371FB */
  123         case 0x70008086:        /* Intel 82371SB */
  124         case 0x71108086:        /* Intel 82371AB */
  125         case 0x71988086:        /* Intel 82443MX */
  126         case 0x24108086:        /* Intel 82801AA (ICH) */
  127         case 0x24208086:        /* Intel 82801AB (ICH0) */
  128         case 0x24408086:        /* Intel 82801AB (ICH2) */
  129         case 0x00061004:        /* VLSI 82C593 */
  130         case 0x05861106:        /* VIA 82C586 */
  131         case 0x05961106:        /* VIA 82C596 */
  132         case 0x06861106:        /* VIA 82C686 */
  133         case 0x153310b9:        /* AcerLabs M1533 */
  134         case 0x154310b9:        /* AcerLabs M1543 */
  135         case 0x00081039:        /* SiS 85c503 */
  136         case 0x00001078:        /* Cyrix Cx5510 */
  137         case 0x01001078:        /* Cyrix Cx5530 */
  138         case 0xc7001045:        /* OPTi 82C700 (FireStar) */
  139         case 0x00011033:        /* NEC 0001 (C-bus) */
  140         case 0x002c1033:        /* NEC 002C (C-bus) */
  141         case 0x003b1033:        /* NEC 003B (C-bus) */
  142         case 0x886a1060:        /* UMC UM8886 ISA */
  143         case 0x02001166:        /* ServerWorks IB6566 PCI */
  144             if (bootverbose)
  145                 printf("PCI-ISA bridge with incorrect subclass 0x%x\n",
  146                        pci_get_subclass(dev));
  147             matched = 1;
  148             break;
  149         
  150         default:
  151             break;
  152         }
  153     }
  154 
  155     if (matched) {
  156         device_set_desc(dev, "PCI-ISA bridge");
  157         return(-10000);
  158     }
  159     return(ENXIO);
  160 }
  161 
  162 static int
  163 isab_pci_attach(device_t dev)
  164 {
  165 
  166         bus_generic_probe(dev);
  167         return (isab_attach(dev));
  168 }
  169 
  170 static struct resource *
  171 isab_pci_alloc_resource(device_t dev, device_t child, int type, int *rid,
  172     rman_res_t start, rman_res_t end, rman_res_t count, u_int flags)
  173 {
  174         struct isab_pci_softc *sc;
  175         int bar;
  176 
  177         if (device_get_parent(child) != dev)
  178                 return bus_generic_alloc_resource(dev, child, type, rid, start,
  179                     end, count, flags);
  180 
  181         switch (type) {
  182         case SYS_RES_MEMORY:
  183         case SYS_RES_IOPORT:
  184                 /*
  185                  * For BARs, we cache the resource so that we only allocate it
  186                  * from the PCI bus once.
  187                  */
  188                 bar = PCI_RID2BAR(*rid);
  189                 if (bar < 0 || bar > PCIR_MAX_BAR_0)
  190                         return (NULL);
  191                 sc = device_get_softc(dev);
  192                 if (sc->isab_pci_res[bar].ip_res == NULL)
  193                         sc->isab_pci_res[bar].ip_res = bus_alloc_resource(dev, type,
  194                             rid, start, end, count, flags);
  195                 if (sc->isab_pci_res[bar].ip_res != NULL)
  196                         sc->isab_pci_res[bar].ip_refs++;
  197                 return (sc->isab_pci_res[bar].ip_res);
  198         }
  199 
  200         return (BUS_ALLOC_RESOURCE(device_get_parent(dev), child, type, rid,
  201                 start, end, count, flags));
  202 }
  203 
  204 static int
  205 isab_pci_release_resource(device_t dev, device_t child, int type, int rid,
  206     struct resource *r)
  207 {
  208         struct isab_pci_softc *sc;
  209         int bar, error;
  210 
  211         if (device_get_parent(child) != dev)
  212                 return bus_generic_release_resource(dev, child, type, rid, r);
  213 
  214         switch (type) {
  215         case SYS_RES_MEMORY:
  216         case SYS_RES_IOPORT:
  217                 /*
  218                  * For BARs, we release the resource from the PCI bus
  219                  * when the last child reference goes away.
  220                  */
  221                 bar = PCI_RID2BAR(rid);
  222                 if (bar < 0 || bar > PCIR_MAX_BAR_0)
  223                         return (EINVAL);
  224                 sc = device_get_softc(dev);
  225                 if (sc->isab_pci_res[bar].ip_res == NULL)
  226                         return (EINVAL);
  227                 KASSERT(sc->isab_pci_res[bar].ip_res == r,
  228                     ("isa_pci resource mismatch"));
  229                 if (sc->isab_pci_res[bar].ip_refs > 1) {
  230                         sc->isab_pci_res[bar].ip_refs--;
  231                         return (0);
  232                 }
  233                 KASSERT(sc->isab_pci_res[bar].ip_refs > 0,
  234                     ("isa_pci resource reference count underflow"));
  235                 error = bus_release_resource(dev, type, rid, r);
  236                 if (error == 0) {
  237                         sc->isab_pci_res[bar].ip_res = NULL;
  238                         sc->isab_pci_res[bar].ip_refs = 0;
  239                 }
  240                 return (error);
  241         }
  242 
  243         return (BUS_RELEASE_RESOURCE(device_get_parent(dev), child, type,
  244                 rid, r));
  245 }

Cache object: 501900fa069ea0d4eba62785c35a6ea6


[ source navigation ] [ diff markup ] [ identifier search ] [ freetext search ] [ file search ] [ list types ] [ track identifier ]


This page is part of the FreeBSD/Linux Linux Kernel Cross-Reference, and was automatically generated using a modified version of the LXR engine.