sys/dev/acpica5/acpi_pci.c

   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: src/sys/dev/acpica/acpi_pci.c,v 1.16 2004/05/29 04:32:50 njl Exp $
  29  * $DragonFly: src/sys/dev/acpica5/acpi_pci.c,v 1.5 2006/09/05 00:55:36 dillon Exp $
  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 #include "acpivar.h"
  43
  44 #include <sys/pciio.h>
  45 #include <bus/pci/pcireg.h>
  46 #include <bus/pci/pcivar.h>
  47 #include <bus/pci/pci_private.h>
  48
  49 #include "pcib_if.h"
  50 #include "pci_if.h"
  51
  52 /* Hooks for the ACPI CA debugging infrastructure. */
  53 #define _COMPONENT      ACPI_BUS
  54 ACPI_MODULE_NAME("PCI")
  55
  56 struct acpi_pci_devinfo {
  57         struct pci_devinfo      ap_dinfo;
  58         ACPI_HANDLE             ap_handle;
  59 };
  60
  61 static int      acpi_pci_probe(device_t dev);
  62 static int      acpi_pci_attach(device_t dev);
  63 static int      acpi_pci_read_ivar(device_t dev, device_t child, int which,
  64                     uintptr_t *result);
  65 static int      acpi_pci_child_location_str_method(device_t cbdev,
  66                     device_t child, char *buf, size_t buflen);
  67
  68
  69 static int      acpi_pci_set_powerstate_method(device_t dev, device_t child,
  70                     int state);
  71 static ACPI_STATUS acpi_pci_save_handle(ACPI_HANDLE handle, UINT32 level,
  72                     void *context, void **status);
  73
  74 static device_method_t acpi_pci_methods[] = {
  75         /* Device interface */
  76         DEVMETHOD(device_probe,         acpi_pci_probe),
  77         DEVMETHOD(device_attach,        acpi_pci_attach),
  78         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  79         DEVMETHOD(device_suspend,       bus_generic_suspend),
  80         DEVMETHOD(device_resume,        bus_generic_resume),
  81
  82         /* Bus interface */
  83         DEVMETHOD(bus_print_child,      pci_print_child),
  84         DEVMETHOD(bus_probe_nomatch,    pci_probe_nomatch),
  85         DEVMETHOD(bus_read_ivar,        acpi_pci_read_ivar),
  86         DEVMETHOD(bus_write_ivar,       pci_write_ivar),
  87         DEVMETHOD(bus_driver_added,     bus_generic_driver_added),
  88         DEVMETHOD(bus_setup_intr,       bus_generic_setup_intr),
  89         DEVMETHOD(bus_teardown_intr,    bus_generic_teardown_intr),
  90
  91         DEVMETHOD(bus_get_resource_list,pci_get_resource_list),
  92         DEVMETHOD(bus_set_resource,     bus_generic_rl_set_resource),
  93         DEVMETHOD(bus_get_resource,     bus_generic_rl_get_resource),
  94         DEVMETHOD(bus_delete_resource,  pci_delete_resource),
  95         DEVMETHOD(bus_alloc_resource,   pci_alloc_resource),
  96         DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource),
  97         DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
  98         DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
  99         DEVMETHOD(bus_child_pnpinfo_str, pci_child_pnpinfo_str_method),
 100         DEVMETHOD(bus_child_location_str, acpi_pci_child_location_str_method),
 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         DEVMETHOD(pci_get_powerstate,   pci_get_powerstate_method),
 110         DEVMETHOD(pci_set_powerstate,   acpi_pci_set_powerstate_method),
 111         DEVMETHOD(pci_assign_interrupt, pci_assign_interrupt_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_DEPEND(acpi_pci, acpi, 1, 1, 1);
 124 MODULE_VERSION(acpi_pci, 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 static int
 141 acpi_pci_child_location_str_method(device_t cbdev, device_t child, char *buf,
 142     size_t buflen)
 143 {
 144     struct acpi_pci_devinfo *dinfo = device_get_ivars(child);
 145
 146     pci_child_location_str_method(cbdev, child, buf, buflen);
 147
 148     if (dinfo->ap_handle) {
 149         strlcat(buf, " path=", buflen);
 150         strlcat(buf, acpi_name(dinfo->ap_handle), buflen);
 151     }
 152     return (0);
 153 }
 154
 155 /*
 156  * PCI power manangement
 157  */
 158 static int
 159 acpi_pci_set_powerstate_method(device_t dev, device_t child, int state)
 160 {
 161         ACPI_HANDLE h;
 162         ACPI_STATUS status;
 163         int acpi_state, old_state, error;
 164
 165         switch (state) {
 166         case PCI_POWERSTATE_D0:
 167                 acpi_state = ACPI_STATE_D0;
 168                 break;
 169         case PCI_POWERSTATE_D1:
 170                 acpi_state = ACPI_STATE_D1;
 171                 break;
 172         case PCI_POWERSTATE_D2:
 173                 acpi_state = ACPI_STATE_D2;
 174                 break;
 175         case PCI_POWERSTATE_D3:
 176                 acpi_state = ACPI_STATE_D3;
 177                 break;
 178         default:
 179                 return (EINVAL);
 180         }
 181
 182         /*
 183          * We set the state using PCI Power Management outside of setting
 184          * the ACPI state.  This means that when powering down a device, we
 185          * first shut it down using PCI, and then using ACPI, which lets ACPI
 186          * try to power down any Power Resources that are now no longer used.
 187          * When powering up a device, we let ACPI set the state first so that
 188          * it can enable any needed Power Resources before changing the PCI
 189          * power state.
 190          */
 191         old_state = pci_get_powerstate(child);
 192         if (old_state < state) {
 193                 error = pci_set_powerstate_method(dev, child, state);
 194                 if (error)
 195                         return (error);
 196         }
 197         h = acpi_get_handle(child);
 198         if (h != NULL) {
 199                 status = acpi_pwr_switch_consumer(h, acpi_state);
 200                 if (ACPI_FAILURE(status))
 201                         device_printf(dev,
 202                             "Failed to set ACPI power state D%d on %s: %s\n",
 203                             acpi_state, device_get_nameunit(child),
 204                             AcpiFormatException(status));
 205         }
 206         if (old_state > state)
 207                 return (pci_set_powerstate_method(dev, child, state));
 208         else
 209                 return (0);
 210 }
 211
 212 static ACPI_STATUS
 213 acpi_pci_save_handle(ACPI_HANDLE handle, UINT32 level, void *context,
 214     void **status)
 215 {
 216         struct acpi_pci_devinfo *dinfo;
 217         device_t *devlist;
 218         int devcount, i, func, slot;
 219         UINT32 address;
 220
 221         ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
 222
 223         if (ACPI_FAILURE(acpi_GetInteger(handle, "_ADR", &address)))
 224                 return_ACPI_STATUS (AE_OK);
 225         slot = address >> 16;
 226         func = address & 0xffff;
 227         if (device_get_children((device_t)context, &devlist, &devcount) != 0)
 228                 return_ACPI_STATUS (AE_OK);
 229         for (i = 0; i < devcount; i++) {
 230                 dinfo = device_get_ivars(devlist[i]);
 231                 if (dinfo->ap_dinfo.cfg.func == func &&
 232                     dinfo->ap_dinfo.cfg.slot == slot) {
 233                         dinfo->ap_handle = handle;
 234                         kfree(devlist, M_TEMP);
 235                         return_ACPI_STATUS (AE_OK);
 236                 }
 237         }
 238         kfree(devlist, M_TEMP);
 239         return_ACPI_STATUS (AE_OK);
 240 }
 241
 242 static int
 243 acpi_pci_probe(device_t dev)
 244 {
 245         if (pcib_get_bus(device_get_parent(dev)) < 0)
 246                 return (ENXIO);
 247         if (acpi_get_handle(dev) == NULL)
 248                 return (ENXIO);
 249         device_set_desc(dev, "ACPI PCI bus");
 250         return (0);
 251 }
 252
 253 static int
 254 acpi_pci_attach(device_t dev)
 255 {
 256         int busno;
 257
 258         /*
 259          * Since there can be multiple independantly numbered PCI
 260          * busses on some large alpha systems, we can't use the unit
 261          * number to decide what bus we are probing. We ask the parent
 262          * pcib what our bus number is.
 263          */
 264         busno = pcib_get_bus(device_get_parent(dev));
 265         if (bootverbose)
 266                 device_printf(dev, "physical bus=%d\n", busno);
 267
 268         /*
 269          * First, PCI devices are added as in the normal PCI bus driver.
 270          * Afterwards, the ACPI namespace under the bridge driver is
 271          * walked to save ACPI handles to all the devices that appear in
 272          * the ACPI namespace as immediate descendants of the bridge.
 273          *
 274          * XXX: Sometimes PCI devices show up in the ACPI namespace that
 275          * pci_add_children() doesn't find.  We currently just ignore
 276          * these devices.
 277          */
 278         pci_add_children(dev, busno, sizeof(struct acpi_pci_devinfo));
 279         AcpiWalkNamespace(ACPI_TYPE_DEVICE, acpi_get_handle(dev), 1,
 280             acpi_pci_save_handle, dev, NULL);
 281
 282         return (bus_generic_attach(dev));
 283 }