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 "accommon.h"
  43 #include "acpivar.h"
  44
  45 #include <sys/pciio.h>
  46 #include <bus/pci/pcireg.h>
  47 #include <bus/pci/pcivar.h>
  48 #include <bus/pci/pci_private.h>
  49
  50 #include "pcib_if.h"
  51 #include "pci_if.h"
  52
  53 /* Hooks for the ACPI CA debugging infrastructure. */
  54 #define _COMPONENT      ACPI_BUS
  55 ACPI_MODULE_NAME("PCI")
  56
  57 struct acpi_pci_devinfo {
  58         struct pci_devinfo      ap_dinfo;
  59         ACPI_HANDLE             ap_handle;
  60 };
  61
  62 static int      acpi_pci_probe(device_t dev);
  63 static int      acpi_pci_attach(device_t dev);
  64 static int      acpi_pci_read_ivar(device_t dev, device_t child, int which,
  65                     uintptr_t *result);
  66 static int      acpi_pci_child_location_str_method(device_t cbdev,
  67                     device_t child, char *buf, size_t buflen);
  68
  69
  70 static int      acpi_pci_set_powerstate_method(device_t dev, device_t child,
  71                     int state);
  72 static ACPI_STATUS acpi_pci_save_handle(ACPI_HANDLE handle, UINT32 level,
  73                     void *context, void **status);
  74
  75 static device_method_t acpi_pci_methods[] = {
  76         /* Device interface */
  77         DEVMETHOD(device_probe,         acpi_pci_probe),
  78         DEVMETHOD(device_attach,        acpi_pci_attach),
  79         DEVMETHOD(device_shutdown,      bus_generic_shutdown),
  80         DEVMETHOD(device_suspend,       bus_generic_suspend),
  81         DEVMETHOD(device_resume,        bus_generic_resume),
  82
  83         /* Bus interface */
  84         DEVMETHOD(bus_print_child,      pci_print_child),
  85         DEVMETHOD(bus_probe_nomatch,    pci_probe_nomatch),
  86         DEVMETHOD(bus_read_ivar,        acpi_pci_read_ivar),
  87         DEVMETHOD(bus_write_ivar,       pci_write_ivar),
  88         DEVMETHOD(bus_driver_added,     bus_generic_driver_added),
  89         DEVMETHOD(bus_setup_intr,       bus_generic_setup_intr),
  90         DEVMETHOD(bus_teardown_intr,    bus_generic_teardown_intr),
  91
  92         DEVMETHOD(bus_get_resource_list,pci_get_resource_list),
  93         DEVMETHOD(bus_set_resource,     bus_generic_rl_set_resource),
  94         DEVMETHOD(bus_get_resource,     bus_generic_rl_get_resource),
  95         DEVMETHOD(bus_delete_resource,  pci_delete_resource),
  96         DEVMETHOD(bus_alloc_resource,   pci_alloc_resource),
  97         DEVMETHOD(bus_release_resource, bus_generic_rl_release_resource),
  98         DEVMETHOD(bus_activate_resource, bus_generic_activate_resource),
  99         DEVMETHOD(bus_deactivate_resource, bus_generic_deactivate_resource),
 100         DEVMETHOD(bus_child_pnpinfo_str, pci_child_pnpinfo_str_method),
 101         DEVMETHOD(bus_child_location_str, acpi_pci_child_location_str_method),
 102
 103         /* PCI interface */
 104         DEVMETHOD(pci_read_config,      pci_read_config_method),
 105         DEVMETHOD(pci_write_config,     pci_write_config_method),
 106         DEVMETHOD(pci_enable_busmaster, pci_enable_busmaster_method),
 107         DEVMETHOD(pci_disable_busmaster, pci_disable_busmaster_method),
 108         DEVMETHOD(pci_enable_io,        pci_enable_io_method),
 109         DEVMETHOD(pci_disable_io,       pci_disable_io_method),
 110         DEVMETHOD(pci_get_powerstate,   pci_get_powerstate_method),
 111         DEVMETHOD(pci_set_powerstate,   acpi_pci_set_powerstate_method),
 112         DEVMETHOD(pci_assign_interrupt, pci_assign_interrupt_method),
 113
 114         { 0, 0 }
 115 };
 116
 117 static driver_t acpi_pci_driver = {
 118         "pci",
 119         acpi_pci_methods,
 120         0,                      /* no softc */
 121 };
 122
 123 static devclass_t pci_devclass;
 124
 125 DRIVER_MODULE(acpi_pci, pcib, acpi_pci_driver, pci_devclass, 0, 0);
 126 MODULE_DEPEND(acpi_pci, acpi, 1, 1, 1);
 127 MODULE_VERSION(acpi_pci, 1);
 128
 129 static int
 130 acpi_pci_read_ivar(device_t dev, device_t child, int which, uintptr_t *result)
 131 {
 132     struct acpi_pci_devinfo *dinfo;
 133
 134     switch (which) {
 135     case ACPI_IVAR_HANDLE:
 136         dinfo = device_get_ivars(child);
 137         *result = (uintptr_t)dinfo->ap_handle;
 138         return (0);
 139     }
 140     return (pci_read_ivar(dev, child, which, result));
 141 }
 142
 143 static int
 144 acpi_pci_child_location_str_method(device_t cbdev, device_t child, char *buf,
 145     size_t buflen)
 146 {
 147     struct acpi_pci_devinfo *dinfo = device_get_ivars(child);
 148
 149     pci_child_location_str_method(cbdev, child, buf, buflen);
 150
 151     if (dinfo->ap_handle) {
 152         strlcat(buf, " path=", buflen);
 153         strlcat(buf, acpi_name(dinfo->ap_handle), buflen);
 154     }
 155     return (0);
 156 }
 157
 158 /*
 159  * PCI power manangement
 160  */
 161 static int
 162 acpi_pci_set_powerstate_method(device_t dev, device_t child, int state)
 163 {
 164         ACPI_HANDLE h;
 165         ACPI_STATUS status;
 166         int acpi_state, old_state, error;
 167
 168         switch (state) {
 169         case PCI_POWERSTATE_D0:
 170                 acpi_state = ACPI_STATE_D0;
 171                 break;
 172         case PCI_POWERSTATE_D1:
 173                 acpi_state = ACPI_STATE_D1;
 174                 break;
 175         case PCI_POWERSTATE_D2:
 176                 acpi_state = ACPI_STATE_D2;
 177                 break;
 178         case PCI_POWERSTATE_D3:
 179                 acpi_state = ACPI_STATE_D3;
 180                 break;
 181         default:
 182                 return (EINVAL);
 183         }
 184
 185         /*
 186          * We set the state using PCI Power Management outside of setting
 187          * the ACPI state.  This means that when powering down a device, we
 188          * first shut it down using PCI, and then using ACPI, which lets ACPI
 189          * try to power down any Power Resources that are now no longer used.
 190          * When powering up a device, we let ACPI set the state first so that
 191          * it can enable any needed Power Resources before changing the PCI
 192          * power state.
 193          */
 194         old_state = pci_get_powerstate(child);
 195         if (old_state < state) {
 196                 error = pci_set_powerstate_method(dev, child, state);
 197                 if (error)
 198                         return (error);
 199         }
 200         h = acpi_get_handle(child);
 201         if (h != NULL) {
 202                 status = acpi_pwr_switch_consumer(h, acpi_state);
 203                 if (ACPI_FAILURE(status))
 204                         device_printf(dev,
 205                             "Failed to set ACPI power state D%d on %s: %s\n",
 206                             acpi_state, device_get_nameunit(child),
 207                             AcpiFormatException(status));
 208         }
 209         if (old_state > state)
 210                 return (pci_set_powerstate_method(dev, child, state));
 211         else
 212                 return (0);
 213 }
 214
 215 static ACPI_STATUS
 216 acpi_pci_save_handle(ACPI_HANDLE handle, UINT32 level, void *context,
 217     void **status)
 218 {
 219         struct acpi_pci_devinfo *dinfo;
 220         device_t *devlist;
 221         int devcount, i, func, slot;
 222         UINT32 address;
 223
 224         ACPI_FUNCTION_TRACE((char *)(uintptr_t)__func__);
 225
 226         if (ACPI_FAILURE(acpi_GetInteger(handle, "_ADR", &address)))
 227                 return_ACPI_STATUS (AE_OK);
 228         slot = address >> 16;
 229         func = address & 0xffff;
 230         if (device_get_children((device_t)context, &devlist, &devcount) != 0)
 231                 return_ACPI_STATUS (AE_OK);
 232         for (i = 0; i < devcount; i++) {
 233                 dinfo = device_get_ivars(devlist[i]);
 234                 if (dinfo->ap_dinfo.cfg.func == func &&
 235                     dinfo->ap_dinfo.cfg.slot == slot) {
 236                         dinfo->ap_handle = handle;
 237                         kfree(devlist, M_TEMP);
 238                         return_ACPI_STATUS (AE_OK);
 239                 }
 240         }
 241         kfree(devlist, M_TEMP);
 242         return_ACPI_STATUS (AE_OK);
 243 }
 244
 245 static int
 246 acpi_pci_probe(device_t dev)
 247 {
 248         if (pcib_get_bus(device_get_parent(dev)) < 0)
 249                 return (ENXIO);
 250         if (acpi_get_handle(dev) == NULL)
 251                 return (ENXIO);
 252         device_set_desc(dev, "ACPI PCI bus");
 253         return (0);
 254 }
 255
 256 static int
 257 acpi_pci_attach(device_t dev)
 258 {
 259         int busno, domain;
 260
 261         /*
 262          * Since there can be multiple independantly numbered PCI
 263          * busses on some large alpha systems, we can't use the unit
 264          * number to decide what bus we are probing. We ask the parent
 265          * pcib what our bus number is.
 266          */
 267         busno = pcib_get_bus(device_get_parent(dev));
 268         if (bootverbose)
 269                 device_printf(dev, "physical bus=%d\n", busno);
 270
 271         domain = pcib_get_domain(device_get_parent(dev));
 272
 273         /*
 274          * First, PCI devices are added as in the normal PCI bus driver.
 275          * Afterwards, the ACPI namespace under the bridge driver is
 276          * walked to save ACPI handles to all the devices that appear in
 277          * the ACPI namespace as immediate descendants of the bridge.
 278          *
 279          * XXX: Sometimes PCI devices show up in the ACPI namespace that
 280          * pci_add_children() doesn't find.  We currently just ignore
 281          * these devices.
 282          */
 283         pci_add_children(dev, domain, busno, sizeof(struct acpi_pci_devinfo));
 284         AcpiWalkNamespace(ACPI_TYPE_DEVICE, acpi_get_handle(dev), 1,
 285             acpi_pci_save_handle, dev, NULL);
 286
 287         return (bus_generic_attach(dev));
 288 }