sys/dev/acpica/acpi_pcib_pci.c

   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  * $FreeBSD: src/sys/dev/acpica/acpi_pcib_pci.c,v 1.17.8.1 2009/04/15 03:14:26 kensmith Exp $
  28  */
  29
  30 #include "opt_acpi.h"
  31
  32 #include <sys/param.h>
  33 #include <sys/bus.h>
  34 #include <sys/kernel.h>
  35 #include <sys/malloc.h>
  36 #include <sys/module.h>
  37 #include <sys/rman.h>
  38
  39 #include "acpi.h"
  40 #include <dev/acpica/acpivar.h>
  41 #include <dev/acpica/acpi_pcibvar.h>
  42
  43 #include <bus/pci/pcivar.h>
  44 #include <bus/pci/pcireg.h>
  45 #include <bus/pci/pcib_private.h>
  46 #include "pcib_if.h"
  47
  48 /* Hooks for the ACPICA debugging infrastructure. */
  49 #define _COMPONENT      ACPI_BUS
  50 ACPI_MODULE_NAME("PCI_PCI")
  51
  52 struct acpi_pcib_softc {
  53     struct pcib_softc   ap_pcibsc;
  54     ACPI_HANDLE         ap_handle;
  55     ACPI_BUFFER         ap_prt;         /* interrupt routing table */
  56 };
  57
  58 struct acpi_pcib_lookup_info {
  59     UINT32              address;
  60     ACPI_HANDLE         handle;
  61 };
  62
  63 static int              acpi_pcib_pci_probe(device_t bus);
  64 static int              acpi_pcib_pci_attach(device_t bus);
  65 static int              acpi_pcib_pci_resume(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     DEVMETHOD(device_resume,            acpi_pcib_pci_resume),
  76
  77     /* Bus interface */
  78     DEVMETHOD(bus_read_ivar,            acpi_pcib_read_ivar),
  79
  80     /* pcib interface */
  81     DEVMETHOD(pcib_route_interrupt,     acpi_pcib_pci_route_interrupt),
  82
  83     DEVMETHOD_END
  84 };
  85
  86 static devclass_t pcib_devclass;
  87
  88 DEFINE_CLASS_1(pcib, acpi_pcib_pci_driver, acpi_pcib_pci_methods,
  89     sizeof(struct acpi_pcib_softc), pcib_driver);
  90 DRIVER_MODULE(acpi_pcib, pci, acpi_pcib_pci_driver, pcib_devclass, NULL, NULL);
  91 MODULE_DEPEND(acpi_pcib, acpi, 1, 1, 1);
  92
  93 static int
  94 acpi_pcib_pci_probe(device_t dev)
  95 {
  96     int error;
  97
  98     if (pci_get_class(dev) != PCIC_BRIDGE ||
  99         pci_get_subclass(dev) != PCIS_BRIDGE_PCI ||
 100         acpi_disabled("pci"))
 101         return (ENXIO);
 102
 103     error = acpi_pcib_probe(dev);
 104     if (error)
 105         return (error);
 106
 107     device_set_desc(dev, "ACPI PCI-PCI bridge");
 108     return (-100);
 109 }
 110
 111 static int
 112 acpi_pcib_pci_attach(device_t dev)
 113 {
 114     struct acpi_pcib_softc *sc;
 115
 116     ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
 117
 118     pcib_attach_common(dev);
 119     sc = device_get_softc(dev);
 120     sc->ap_handle = acpi_get_handle(dev);
 121     return (acpi_pcib_attach(dev, &sc->ap_prt, sc->ap_pcibsc.secbus));
 122 }
 123
 124 static int
 125 acpi_pcib_pci_resume(device_t dev)
 126 {
 127     return (acpi_pcib_resume(dev));
 128 }
 129
 130 static int
 131 acpi_pcib_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
 132 {
 133     struct acpi_pcib_softc *sc = device_get_softc(dev);
 134
 135     switch (which) {
 136     case ACPI_IVAR_HANDLE:
 137         *result = (uintptr_t)sc->ap_handle;
 138         return (0);
 139     }
 140     return (pcib_read_ivar(dev, child, which, result));
 141 }
 142
 143 static int
 144 acpi_pcib_pci_route_interrupt(device_t pcib, device_t dev, int pin)
 145 {
 146     struct acpi_pcib_softc *sc = device_get_softc(pcib);
 147
 148     /*
 149      * If we don't have a _PRT, fall back to the swizzle method
 150      * for routing interrupts.
 151      */
 152     if (sc->ap_prt.Pointer == NULL) {
 153         device_printf(pcib, "No _PRT found, routing with pci\n");
 154         return (pcib_route_interrupt(pcib, dev, pin));
 155     } else {
 156         return (acpi_pcib_route_interrupt(pcib, dev, pin, &sc->ap_prt));
 157     }
 158 }