FreeBSD/Linux Kernel Cross Reference
sys/dev/acpica/acpi_pcib_pci.c

     /*-
      * Copyright (c) 2000 Michael Smith
      * Copyright (c) 2000 BSDi
      * All rights reserved.
      *
      * Redistribution and use in source and binary forms, with or without
      * modification, are permitted provided that the following conditions
      * are met:
      * 1. Redistributions of source code must retain the above copyright
     *    notice, this list of conditions and the following disclaimer.
     * 2. Redistributions in binary form must reproduce the above copyright
     *    notice, this list of conditions and the following disclaimer in the
     *    documentation and/or other materials provided with the distribution.
     *
     * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     * SUCH DAMAGE.
     */
    
    #include <sys/cdefs.h>
    __FBSDID("$FreeBSD: releng/8.3/sys/dev/acpica/acpi_pcib_pci.c 223674 2011-06-29 15:58:26Z jhb $");
    
    #include "opt_acpi.h"
    
    #include <sys/param.h>
    #include <sys/bus.h>
    #include <sys/kernel.h>
    #include <sys/malloc.h>
    #include <sys/module.h>
    #include <sys/rman.h>
    
    #include <contrib/dev/acpica/include/acpi.h>
    #include <contrib/dev/acpica/include/accommon.h>
    
    #include <dev/acpica/acpivar.h>
    #include <dev/acpica/acpi_pcibvar.h>
    
    #include <machine/pci_cfgreg.h>
    #include <dev/pci/pcivar.h>
    #include <dev/pci/pcireg.h>
    #include <dev/pci/pcib_private.h>
    #include "pcib_if.h"
    
    /* Hooks for the ACPI CA debugging infrastructure. */
    #define _COMPONENT      ACPI_BUS
    ACPI_MODULE_NAME("PCI_PCI")
    
    struct acpi_pcib_softc {
        struct pcib_softc   ap_pcibsc;
        ACPI_HANDLE         ap_handle;
        ACPI_BUFFER         ap_prt;         /* interrupt routing table */
    };
    
    struct acpi_pcib_lookup_info {
        UINT32              address;
        ACPI_HANDLE         handle;
    };
    
    static int              acpi_pcib_pci_probe(device_t bus);
    static int              acpi_pcib_pci_attach(device_t bus);
    static int              acpi_pcib_read_ivar(device_t dev, device_t child,
                                int which, uintptr_t *result);
    static int              acpi_pcib_pci_route_interrupt(device_t pcib,
                                device_t dev, int pin);
    
    static device_method_t acpi_pcib_pci_methods[] = {
        /* Device interface */
        DEVMETHOD(device_probe,             acpi_pcib_pci_probe),
        DEVMETHOD(device_attach,            acpi_pcib_pci_attach),
    
        /* Bus interface */
        DEVMETHOD(bus_read_ivar,            acpi_pcib_read_ivar),
    
        /* pcib interface */
        DEVMETHOD(pcib_route_interrupt,     acpi_pcib_pci_route_interrupt),
    
        {0, 0}
    };
    
    static devclass_t pcib_devclass;
    
    DEFINE_CLASS_1(pcib, acpi_pcib_pci_driver, acpi_pcib_pci_methods,
        sizeof(struct acpi_pcib_softc), pcib_driver);
    DRIVER_MODULE(acpi_pcib, pci, acpi_pcib_pci_driver, pcib_devclass, 0, 0);
    MODULE_DEPEND(acpi_pcib, acpi, 1, 1, 1);
    
    static int
    acpi_pcib_pci_probe(device_t dev)
    {
    
        if (pci_get_class(dev) != PCIC_BRIDGE ||
           pci_get_subclass(dev) != PCIS_BRIDGE_PCI ||
           acpi_disabled("pci"))
           return (ENXIO);
       if (acpi_get_handle(dev) == NULL)
           return (ENXIO);
       if (pci_cfgregopen() == 0)
           return (ENXIO);
   
       device_set_desc(dev, "ACPI PCI-PCI bridge");
       return (-1000);
   }
   
   static int
   acpi_pcib_pci_attach(device_t dev)
   {
       struct acpi_pcib_softc *sc;
   
       ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
   
       pcib_attach_common(dev);
       sc = device_get_softc(dev);
       sc->ap_handle = acpi_get_handle(dev);
       return (acpi_pcib_attach(dev, &sc->ap_prt, sc->ap_pcibsc.secbus));
   }
   
   static int
   acpi_pcib_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
   {
       struct acpi_pcib_softc *sc = device_get_softc(dev);
   
       switch (which) {
       case ACPI_IVAR_HANDLE:
           *result = (uintptr_t)sc->ap_handle;
           return (0);
       }
       return (pcib_read_ivar(dev, child, which, result));
   }
   
   static int
   acpi_pcib_pci_route_interrupt(device_t pcib, device_t dev, int pin)
   {
       struct acpi_pcib_softc *sc;
   
       sc = device_get_softc(pcib);
   
       /*
        * If we don't have a _PRT, fall back to the swizzle method
        * for routing interrupts.
        */
       if (sc->ap_prt.Pointer == NULL)
           return (pcib_route_interrupt(pcib, dev, pin));
       else
           return (acpi_pcib_route_interrupt(pcib, dev, pin, &sc->ap_prt));
   }

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