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/acpica/acpi_pcib_pci.c

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    1 /*-
    2  * Copyright (c) 2000 Michael Smith
    3  * Copyright (c) 2000 BSDi
    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
   16  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   17  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   18  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
   19  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   20  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   21  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   22  * HOWEVER 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 
   28 #include <sys/cdefs.h>
   29 __FBSDID("$FreeBSD$");
   30 
   31 #include "opt_acpi.h"
   32 
   33 #include <sys/param.h>
   34 #include <sys/bus.h>
   35 #include <sys/kernel.h>
   36 #include <sys/malloc.h>
   37 #include <sys/module.h>
   38 
   39 #include <contrib/dev/acpica/acpi.h>
   40 #include <dev/acpica/acpivar.h>
   41 #include <dev/acpica/acpi_pcibvar.h>
   42 
   43 #include <machine/pci_cfgreg.h>
   44 #include <dev/pci/pcivar.h>
   45 #include <dev/pci/pcireg.h>
   46 #include <dev/pci/pcib_private.h>
   47 #include "pcib_if.h"
   48 
   49 /* Hooks for the ACPI CA debugging infrastructure. */
   50 #define _COMPONENT      ACPI_BUS
   51 ACPI_MODULE_NAME("PCI_PCI")
   52 
   53 struct acpi_pcib_softc {
   54     struct pcib_softc   ap_pcibsc;
   55     ACPI_HANDLE         ap_handle;
   56     ACPI_BUFFER         ap_prt;         /* interrupt routing table */
   57 };
   58 
   59 struct acpi_pcib_lookup_info {
   60     UINT32              address;
   61     ACPI_HANDLE         handle;
   62 };
   63 
   64 static int              acpi_pcib_pci_probe(device_t bus);
   65 static int              acpi_pcib_pci_attach(device_t bus);
   66 static int              acpi_pcib_read_ivar(device_t dev, device_t child,
   67                             int which, uintptr_t *result);
   68 static int              acpi_pcib_pci_route_interrupt(device_t pcib,
   69                             device_t dev, int pin);
   70 
   71 static device_method_t acpi_pcib_pci_methods[] = {
   72     /* Device interface */
   73     DEVMETHOD(device_probe,             acpi_pcib_pci_probe),
   74     DEVMETHOD(device_attach,            acpi_pcib_pci_attach),
   75 
   76     /* Bus interface */
   77     DEVMETHOD(bus_read_ivar,            acpi_pcib_read_ivar),
   78 
   79     /* pcib interface */
   80     DEVMETHOD(pcib_route_interrupt,     acpi_pcib_pci_route_interrupt),
   81 
   82     {0, 0}
   83 };
   84 
   85 static devclass_t pcib_devclass;
   86 
   87 DEFINE_CLASS_1(pcib, acpi_pcib_pci_driver, acpi_pcib_pci_methods,
   88     sizeof(struct acpi_pcib_softc), pcib_driver);
   89 DRIVER_MODULE(acpi_pcib, pci, acpi_pcib_pci_driver, pcib_devclass, 0, 0);
   90 MODULE_DEPEND(acpi_pcib, acpi, 1, 1, 1);
   91 
   92 static int
   93 acpi_pcib_pci_probe(device_t dev)
   94 {
   95 
   96     if (pci_get_class(dev) != PCIC_BRIDGE ||
   97         pci_get_subclass(dev) != PCIS_BRIDGE_PCI ||
   98         acpi_disabled("pci"))
   99         return (ENXIO);
  100     if (acpi_get_handle(dev) == NULL)
  101         return (ENXIO);
  102     if (pci_cfgregopen() == 0)
  103         return (ENXIO);
  104 
  105     device_set_desc(dev, "ACPI PCI-PCI bridge");
  106     return (-1000);
  107 }
  108 
  109 static int
  110 acpi_pcib_pci_attach(device_t dev)
  111 {
  112     struct acpi_pcib_softc *sc;
  113 
  114     ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
  115 
  116     pcib_attach_common(dev);
  117     sc = device_get_softc(dev);
  118     sc->ap_handle = acpi_get_handle(dev);
  119     return (acpi_pcib_attach(dev, &sc->ap_prt, sc->ap_pcibsc.secbus));
  120 }
  121 
  122 static int
  123 acpi_pcib_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
  124 {
  125     struct acpi_pcib_softc *sc = device_get_softc(dev);
  126 
  127     switch (which) {
  128     case ACPI_IVAR_HANDLE:
  129         *result = (uintptr_t)sc->ap_handle;
  130         return (0);
  131     }
  132     return (pcib_read_ivar(dev, child, which, result));
  133 }
  134 
  135 static int
  136 acpi_pcib_pci_route_interrupt(device_t pcib, device_t dev, int pin)
  137 {
  138     struct acpi_pcib_softc *sc;
  139 
  140     sc = device_get_softc(pcib);
  141 
  142     /*
  143      * If we don't have a _PRT, fall back to the swizzle method
  144      * for routing interrupts.
  145      */
  146     if (sc->ap_prt.Pointer == NULL)
  147         return (pcib_route_interrupt(pcib, dev, pin));
  148     else
  149         return (acpi_pcib_route_interrupt(pcib, dev, pin, &sc->ap_prt));
  150 }

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