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_pci.c

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    1 /*
    2  * Copyright (c) 1997, Stefan Esser <se@freebsd.org>
    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 unmodified, this list of conditions, and the following
   12  *    disclaimer.
   13  * 2. Redistributions in binary form must reproduce the above copyright
   14  *    notice, this list of conditions and the following disclaimer in the
   15  *    documentation and/or other materials provided with the distribution.
   16  *
   17  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
   18  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
   19  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
   20  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
   21  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
   22  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
   23  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
   24  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
   25  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
   26  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
   27  *
   28  * $FreeBSD: releng/5.0/sys/dev/acpica/acpi_pci.c 102919 2002-09-04 03:13:16Z jhb $
   29  *
   30  */
   31 
   32 #include "opt_bus.h"
   33 
   34 #include <sys/param.h>
   35 #include <sys/systm.h>
   36 #include <sys/bus.h>
   37 #include <sys/kernel.h>
   38 #include <sys/malloc.h>
   39 #include <sys/module.h>
   40 
   41 #include "acpi.h"
   42 
   43 #include <dev/acpica/acpivar.h>
   44 
   45 #include <sys/pciio.h>
   46 #include <dev/pci/pcireg.h>
   47 #include <dev/pci/pcivar.h>
   48 #include <dev/pci/pci_private.h>
   49 
   50 #include "pcib_if.h"
   51 #include "pci_if.h"
   52 
   53 /*
   54  * Hooks for the ACPI CA debugging infrastructure
   55  */
   56 #define _COMPONENT      ACPI_BUS
   57 ACPI_MODULE_NAME("PCI")
   58 
   59 struct acpi_pci_devinfo {
   60         struct pci_devinfo ap_dinfo;
   61         ACPI_HANDLE     ap_handle;
   62 };
   63 
   64 static int      acpi_pci_probe(device_t dev);
   65 static int      acpi_pci_attach(device_t dev);
   66 static int      acpi_pci_read_ivar(device_t dev, device_t child, int which,
   67     uintptr_t *result);
   68 #if 0
   69 static int      acpi_pci_set_powerstate_method(device_t dev, device_t child,
   70     int state);
   71 static int      acpi_pci_get_powerstate_method(device_t dev, device_t child);
   72 #endif
   73 static ACPI_STATUS acpi_pci_save_handle(ACPI_HANDLE handle, UINT32 level,
   74     void *context, void **status);
   75 
   76 static device_method_t acpi_pci_methods[] = {
   77         /* Device interface */
   78         DEVMETHOD(device_probe,         acpi_pci_probe),
   79         DEVMETHOD(device_attach,        acpi_pci_attach),
   80         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
   81         DEVMETHOD(device_suspend,       bus_generic_suspend),
   82         DEVMETHOD(device_resume,        bus_generic_resume),
   83 
   84         /* Bus interface */
   85         DEVMETHOD(bus_print_child,      pci_print_child),
   86         DEVMETHOD(bus_probe_nomatch,    pci_probe_nomatch),
   87         DEVMETHOD(bus_read_ivar,        acpi_pci_read_ivar),
   88         DEVMETHOD(bus_write_ivar,       pci_write_ivar),
   89         DEVMETHOD(bus_driver_added,     bus_generic_driver_added),
   90         DEVMETHOD(bus_setup_intr,       bus_generic_setup_intr),
   91         DEVMETHOD(bus_teardown_intr,    bus_generic_teardown_intr),
   92 
   93         DEVMETHOD(bus_get_resource_list,pci_get_resource_list),
   94         DEVMETHOD(bus_set_resource,     bus_generic_rl_set_resource),
   95         DEVMETHOD(bus_get_resource,     bus_generic_rl_get_resource),
   96         DEVMETHOD(bus_delete_resource,  pci_delete_resource),
   97         DEVMETHOD(bus_alloc_resource,   pci_alloc_resource),
   98         DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource),
   99         DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
  100         DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
  101 
  102         /* PCI interface */
  103         DEVMETHOD(pci_read_config,      pci_read_config_method),
  104         DEVMETHOD(pci_write_config,     pci_write_config_method),
  105         DEVMETHOD(pci_enable_busmaster, pci_enable_busmaster_method),
  106         DEVMETHOD(pci_disable_busmaster, pci_disable_busmaster_method),
  107         DEVMETHOD(pci_enable_io,        pci_enable_io_method),
  108         DEVMETHOD(pci_disable_io,       pci_disable_io_method),
  109         /* XXX: We should override these two. */
  110         DEVMETHOD(pci_get_powerstate,   pci_get_powerstate_method),
  111         DEVMETHOD(pci_set_powerstate,   pci_set_powerstate_method),
  112 
  113         { 0, 0 }
  114 };
  115 
  116 static driver_t acpi_pci_driver = {
  117         "pci",
  118         acpi_pci_methods,
  119         0,                      /* no softc */
  120 };
  121 
  122 DRIVER_MODULE(acpi_pci, pcib, acpi_pci_driver, pci_devclass, 0, 0);
  123 MODULE_VERSION(acpi_pci, 1);
  124 MODULE_DEPEND(acpi_pci, pci, 1, 1, 1);
  125 
  126 static int
  127 acpi_pci_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
  128 {
  129     struct acpi_pci_devinfo *dinfo;
  130 
  131     switch (which) {
  132     case  ACPI_IVAR_HANDLE:
  133         dinfo = device_get_ivars(child);
  134         *result = (uintptr_t)dinfo->ap_handle;
  135         return(0);
  136     }
  137     return(pci_read_ivar(dev, child, which, result));
  138 }
  139 
  140 #if 0
  141 /*
  142  * PCI power manangement
  143  */
  144 static int
  145 acpi_pci_set_powerstate_method(device_t dev, device_t child, int state)
  146 {
  147         /* XXX: TODO */
  148         return (ENXIO);
  149 }
  150 
  151 static int
  152 acpi_pci_get_powerstate_method(device_t dev, device_t child)
  153 {
  154         /* XXX: TODO */
  155         return (ENXIO);
  156 }
  157 #endif
  158 
  159 static ACPI_STATUS
  160 acpi_pci_save_handle(ACPI_HANDLE handle, UINT32 level, void *context,
  161     void **status)
  162 {
  163         struct acpi_pci_devinfo *dinfo;
  164         device_t *devlist;
  165         int devcount, i, func, slot;
  166         UINT32 address;
  167 
  168         ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
  169 
  170         if (ACPI_FAILURE(acpi_EvaluateInteger(handle, "_ADR", &address)))
  171                 return_ACPI_STATUS(AE_OK);
  172         slot = address >> 16;
  173         func = address & 0xffff;
  174         if (device_get_children((device_t)context, &devlist, &devcount) != 0)
  175                 return_ACPI_STATUS(AE_OK);
  176         for (i = 0; i < devcount; i++) {
  177                 dinfo = device_get_ivars(devlist[i]);
  178                 if (dinfo->ap_dinfo.cfg.func == func &&
  179                     dinfo->ap_dinfo.cfg.slot == slot) {
  180                         dinfo->ap_handle = handle;
  181                         free(devlist, M_TEMP);
  182                         return_ACPI_STATUS(AE_OK);
  183                 }
  184         }
  185         free(devlist, M_TEMP);
  186         return_ACPI_STATUS(AE_OK);
  187 }
  188 
  189 static int
  190 acpi_pci_probe(device_t dev)
  191 {
  192 
  193         if (pcib_get_bus(dev) < 0)
  194                 return (ENXIO);
  195         
  196         device_set_desc(dev, "ACPI PCI bus");
  197 
  198         if (acpi_get_handle(dev) == NULL)
  199                 return (ENXIO);
  200         return (0);
  201 }
  202 
  203 static int
  204 acpi_pci_attach(device_t dev)
  205 {
  206         int busno;
  207 
  208         /*
  209          * Since there can be multiple independantly numbered PCI
  210          * busses on some large alpha systems, we can't use the unit
  211          * number to decide what bus we are probing. We ask the parent 
  212          * pcib what our bus number is.
  213          */
  214         busno = pcib_get_bus(dev);
  215         if (bootverbose)
  216                 device_printf(dev, "physical bus=%d\n", busno);
  217 
  218         /*
  219          * First, PCI devices are added as in the normal PCI bus driver.
  220          * Afterwards, the ACPI namespace under the bridge driver is
  221          * walked to save ACPI handles to all the devices that appear in
  222          * the ACPI namespace as immediate descendants of the bridge.
  223          *
  224          * XXX: Sometimes PCI devices show up in the ACPI namespace that
  225          * pci_add_children() doesn't find.  We currently just ignore
  226          * these devices.
  227          */
  228         pci_add_children(dev, busno, sizeof(struct acpi_pci_devinfo));
  229         (void) AcpiWalkNamespace(ACPI_TYPE_DEVICE, acpi_get_handle(dev), 1,
  230             acpi_pci_save_handle, dev, NULL);
  231 
  232         return (bus_generic_attach(dev));
  233 }

Cache object: 6dcbeec44345b4e699170cba9ed34df2


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