Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * pci_root.c - ACPI PCI Root Bridge Driver ($Revision: 40 $) |
| 3 | * |
| 4 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> |
| 5 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> |
| 6 | * |
| 7 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or (at |
| 12 | * your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, but |
| 15 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 17 | * General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License along |
| 20 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 21 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. |
| 22 | * |
| 23 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 24 | */ |
| 25 | |
| 26 | #include <linux/kernel.h> |
| 27 | #include <linux/module.h> |
| 28 | #include <linux/init.h> |
| 29 | #include <linux/types.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <linux/spinlock.h> |
| 31 | #include <linux/pm.h> |
Rafael J. Wysocki | b67ea76 | 2010-02-17 23:44:09 +0100 | [diff] [blame] | 32 | #include <linux/pm_runtime.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #include <linux/pci.h> |
Andrew Patterson | 990a7ac | 2008-11-10 15:30:45 -0700 | [diff] [blame] | 34 | #include <linux/pci-acpi.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include <linux/acpi.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 36 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | #include <acpi/acpi_bus.h> |
| 38 | #include <acpi/acpi_drivers.h> |
| 39 | |
Len Brown | a192a95 | 2009-07-28 16:45:54 -0400 | [diff] [blame] | 40 | #define PREFIX "ACPI: " |
| 41 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | #define _COMPONENT ACPI_PCI_COMPONENT |
Len Brown | f52fd66 | 2007-02-12 22:42:12 -0500 | [diff] [blame] | 43 | ACPI_MODULE_NAME("pci_root"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | #define ACPI_PCI_ROOT_CLASS "pci_bridge" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | #define ACPI_PCI_ROOT_DEVICE_NAME "PCI Root Bridge" |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 46 | static int acpi_pci_root_add(struct acpi_device *device); |
| 47 | static int acpi_pci_root_remove(struct acpi_device *device, int type); |
| 48 | static int acpi_pci_root_start(struct acpi_device *device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | |
Márton Németh | c97adf9 | 2010-01-10 17:15:36 +0100 | [diff] [blame] | 50 | static const struct acpi_device_id root_device_ids[] = { |
Thomas Renninger | 1ba90e3 | 2007-07-23 14:44:41 +0200 | [diff] [blame] | 51 | {"PNP0A03", 0}, |
| 52 | {"", 0}, |
| 53 | }; |
| 54 | MODULE_DEVICE_TABLE(acpi, root_device_ids); |
| 55 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | static struct acpi_driver acpi_pci_root_driver = { |
Len Brown | c2b6705 | 2007-02-12 23:33:40 -0500 | [diff] [blame] | 57 | .name = "pci_root", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 58 | .class = ACPI_PCI_ROOT_CLASS, |
Thomas Renninger | 1ba90e3 | 2007-07-23 14:44:41 +0200 | [diff] [blame] | 59 | .ids = root_device_ids, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 60 | .ops = { |
| 61 | .add = acpi_pci_root_add, |
| 62 | .remove = acpi_pci_root_remove, |
| 63 | .start = acpi_pci_root_start, |
| 64 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | }; |
| 66 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | static LIST_HEAD(acpi_pci_roots); |
| 68 | |
| 69 | static struct acpi_pci_driver *sub_driver; |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 70 | static DEFINE_MUTEX(osc_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | |
| 72 | int acpi_pci_register_driver(struct acpi_pci_driver *driver) |
| 73 | { |
| 74 | int n = 0; |
Bjorn Helgaas | c1aec83 | 2009-06-18 14:47:02 -0600 | [diff] [blame] | 75 | struct acpi_pci_root *root; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 76 | |
| 77 | struct acpi_pci_driver **pptr = &sub_driver; |
| 78 | while (*pptr) |
| 79 | pptr = &(*pptr)->next; |
| 80 | *pptr = driver; |
| 81 | |
| 82 | if (!driver->add) |
| 83 | return 0; |
| 84 | |
Bjorn Helgaas | c1aec83 | 2009-06-18 14:47:02 -0600 | [diff] [blame] | 85 | list_for_each_entry(root, &acpi_pci_roots, node) { |
Patrick Mochel | 2d1e0a0 | 2006-05-19 16:54:43 -0400 | [diff] [blame] | 86 | driver->add(root->device->handle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 87 | n++; |
| 88 | } |
| 89 | |
| 90 | return n; |
| 91 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 92 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | EXPORT_SYMBOL(acpi_pci_register_driver); |
| 94 | |
| 95 | void acpi_pci_unregister_driver(struct acpi_pci_driver *driver) |
| 96 | { |
Bjorn Helgaas | c1aec83 | 2009-06-18 14:47:02 -0600 | [diff] [blame] | 97 | struct acpi_pci_root *root; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | |
| 99 | struct acpi_pci_driver **pptr = &sub_driver; |
| 100 | while (*pptr) { |
Akinobu Mita | f10bb25 | 2006-12-19 12:56:09 -0800 | [diff] [blame] | 101 | if (*pptr == driver) |
| 102 | break; |
| 103 | pptr = &(*pptr)->next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 104 | } |
Akinobu Mita | f10bb25 | 2006-12-19 12:56:09 -0800 | [diff] [blame] | 105 | BUG_ON(!*pptr); |
| 106 | *pptr = (*pptr)->next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 107 | |
| 108 | if (!driver->remove) |
| 109 | return; |
| 110 | |
Bjorn Helgaas | c1aec83 | 2009-06-18 14:47:02 -0600 | [diff] [blame] | 111 | list_for_each_entry(root, &acpi_pci_roots, node) |
Patrick Mochel | 2d1e0a0 | 2006-05-19 16:54:43 -0400 | [diff] [blame] | 112 | driver->remove(root->device->handle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 113 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 114 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 115 | EXPORT_SYMBOL(acpi_pci_unregister_driver); |
| 116 | |
Justin Chen | d91a007 | 2006-12-06 10:17:10 -0700 | [diff] [blame] | 117 | acpi_handle acpi_get_pci_rootbridge_handle(unsigned int seg, unsigned int bus) |
| 118 | { |
Bjorn Helgaas | c1aec83 | 2009-06-18 14:47:02 -0600 | [diff] [blame] | 119 | struct acpi_pci_root *root; |
Justin Chen | d91a007 | 2006-12-06 10:17:10 -0700 | [diff] [blame] | 120 | |
Bjorn Helgaas | c1aec83 | 2009-06-18 14:47:02 -0600 | [diff] [blame] | 121 | list_for_each_entry(root, &acpi_pci_roots, node) |
Bjorn Helgaas | 6ad9551 | 2010-03-11 12:20:06 -0700 | [diff] [blame] | 122 | if ((root->segment == (u16) seg) && |
| 123 | (root->secondary.start == (u16) bus)) |
Bjorn Helgaas | c1aec83 | 2009-06-18 14:47:02 -0600 | [diff] [blame] | 124 | return root->device->handle; |
Justin Chen | d91a007 | 2006-12-06 10:17:10 -0700 | [diff] [blame] | 125 | return NULL; |
| 126 | } |
| 127 | |
| 128 | EXPORT_SYMBOL_GPL(acpi_get_pci_rootbridge_handle); |
| 129 | |
Alexander Chiang | 2755820 | 2009-06-10 19:55:14 +0000 | [diff] [blame] | 130 | /** |
| 131 | * acpi_is_root_bridge - determine whether an ACPI CA node is a PCI root bridge |
| 132 | * @handle - the ACPI CA node in question. |
| 133 | * |
| 134 | * Note: we could make this API take a struct acpi_device * instead, but |
| 135 | * for now, it's more convenient to operate on an acpi_handle. |
| 136 | */ |
| 137 | int acpi_is_root_bridge(acpi_handle handle) |
| 138 | { |
| 139 | int ret; |
| 140 | struct acpi_device *device; |
| 141 | |
| 142 | ret = acpi_bus_get_device(handle, &device); |
| 143 | if (ret) |
| 144 | return 0; |
| 145 | |
| 146 | ret = acpi_match_device_ids(device, root_device_ids); |
| 147 | if (ret) |
| 148 | return 0; |
| 149 | else |
| 150 | return 1; |
| 151 | } |
| 152 | EXPORT_SYMBOL_GPL(acpi_is_root_bridge); |
| 153 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | static acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 155 | get_root_bridge_busnr_callback(struct acpi_resource *resource, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | { |
Bjorn Helgaas | 6ad9551 | 2010-03-11 12:20:06 -0700 | [diff] [blame] | 157 | struct resource *res = data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | struct acpi_resource_address64 address; |
| 159 | |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame] | 160 | if (resource->type != ACPI_RESOURCE_TYPE_ADDRESS16 && |
| 161 | resource->type != ACPI_RESOURCE_TYPE_ADDRESS32 && |
| 162 | resource->type != ACPI_RESOURCE_TYPE_ADDRESS64) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | return AE_OK; |
| 164 | |
| 165 | acpi_resource_to_address64(resource, &address); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 166 | if ((address.address_length > 0) && |
Bjorn Helgaas | 6ad9551 | 2010-03-11 12:20:06 -0700 | [diff] [blame] | 167 | (address.resource_type == ACPI_BUS_NUMBER_RANGE)) { |
| 168 | res->start = address.minimum; |
| 169 | res->end = address.minimum + address.address_length - 1; |
| 170 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | |
| 172 | return AE_OK; |
| 173 | } |
| 174 | |
Bjorn Helgaas | f5eebbe | 2009-06-18 14:46:52 -0600 | [diff] [blame] | 175 | static acpi_status try_get_root_bridge_busnr(acpi_handle handle, |
Bjorn Helgaas | 6ad9551 | 2010-03-11 12:20:06 -0700 | [diff] [blame] | 176 | struct resource *res) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | { |
| 178 | acpi_status status; |
| 179 | |
Bjorn Helgaas | 6ad9551 | 2010-03-11 12:20:06 -0700 | [diff] [blame] | 180 | res->start = -1; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 181 | status = |
| 182 | acpi_walk_resources(handle, METHOD_NAME__CRS, |
Bjorn Helgaas | 6ad9551 | 2010-03-11 12:20:06 -0700 | [diff] [blame] | 183 | get_root_bridge_busnr_callback, res); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | if (ACPI_FAILURE(status)) |
| 185 | return status; |
Bjorn Helgaas | 6ad9551 | 2010-03-11 12:20:06 -0700 | [diff] [blame] | 186 | if (res->start == -1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | return AE_ERROR; |
| 188 | return AE_OK; |
| 189 | } |
| 190 | |
Rui Zhang | 2786f6e | 2006-12-21 02:21:13 -0500 | [diff] [blame] | 191 | static void acpi_pci_bridge_scan(struct acpi_device *device) |
| 192 | { |
| 193 | int status; |
| 194 | struct acpi_device *child = NULL; |
| 195 | |
| 196 | if (device->flags.bus_address) |
| 197 | if (device->parent && device->parent->ops.bind) { |
| 198 | status = device->parent->ops.bind(device); |
| 199 | if (!status) { |
| 200 | list_for_each_entry(child, &device->children, node) |
| 201 | acpi_pci_bridge_scan(child); |
| 202 | } |
| 203 | } |
| 204 | } |
| 205 | |
Shaohua Li | 3a9622d | 2009-10-29 11:04:50 +0800 | [diff] [blame] | 206 | static u8 pci_osc_uuid_str[] = "33DB4D5B-1FF7-401C-9657-7441C03DD766"; |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 207 | |
| 208 | static acpi_status acpi_pci_run_osc(acpi_handle handle, |
| 209 | const u32 *capbuf, u32 *retval) |
| 210 | { |
Shaohua Li | 3a9622d | 2009-10-29 11:04:50 +0800 | [diff] [blame] | 211 | struct acpi_osc_context context = { |
| 212 | .uuid_str = pci_osc_uuid_str, |
| 213 | .rev = 1, |
| 214 | .cap.length = 12, |
| 215 | .cap.pointer = (void *)capbuf, |
| 216 | }; |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 217 | acpi_status status; |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 218 | |
Shaohua Li | 3a9622d | 2009-10-29 11:04:50 +0800 | [diff] [blame] | 219 | status = acpi_run_osc(handle, &context); |
| 220 | if (ACPI_SUCCESS(status)) { |
| 221 | *retval = *((u32 *)(context.ret.pointer + 8)); |
| 222 | kfree(context.ret.pointer); |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 223 | } |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 224 | return status; |
| 225 | } |
| 226 | |
Rafael J. Wysocki | ab8e895 | 2010-08-21 01:53:27 +0200 | [diff] [blame] | 227 | static acpi_status acpi_pci_query_osc(struct acpi_pci_root *root, |
| 228 | u32 support, |
| 229 | u32 *control) |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 230 | { |
| 231 | acpi_status status; |
Rafael J. Wysocki | ab8e895 | 2010-08-21 01:53:27 +0200 | [diff] [blame] | 232 | u32 result, capbuf[3]; |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 233 | |
Rafael J. Wysocki | ab8e895 | 2010-08-21 01:53:27 +0200 | [diff] [blame] | 234 | support &= OSC_PCI_SUPPORT_MASKS; |
| 235 | support |= root->osc_support_set; |
| 236 | |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 237 | capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE; |
Rafael J. Wysocki | ab8e895 | 2010-08-21 01:53:27 +0200 | [diff] [blame] | 238 | capbuf[OSC_SUPPORT_TYPE] = support; |
| 239 | if (control) { |
| 240 | *control &= OSC_PCI_CONTROL_MASKS; |
| 241 | capbuf[OSC_CONTROL_TYPE] = *control | root->osc_control_set; |
| 242 | } else { |
| 243 | /* Run _OSC query for all possible controls. */ |
| 244 | capbuf[OSC_CONTROL_TYPE] = OSC_PCI_CONTROL_MASKS; |
| 245 | } |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 246 | |
| 247 | status = acpi_pci_run_osc(root->device->handle, capbuf, &result); |
| 248 | if (ACPI_SUCCESS(status)) { |
Rafael J. Wysocki | ab8e895 | 2010-08-21 01:53:27 +0200 | [diff] [blame] | 249 | root->osc_support_set = support; |
Rafael J. Wysocki | 2b8fd91 | 2010-08-23 23:55:59 +0200 | [diff] [blame] | 250 | if (control) |
Rafael J. Wysocki | ab8e895 | 2010-08-21 01:53:27 +0200 | [diff] [blame] | 251 | *control = result; |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 252 | } |
| 253 | return status; |
| 254 | } |
| 255 | |
| 256 | static acpi_status acpi_pci_osc_support(struct acpi_pci_root *root, u32 flags) |
| 257 | { |
| 258 | acpi_status status; |
| 259 | acpi_handle tmp; |
| 260 | |
| 261 | status = acpi_get_handle(root->device->handle, "_OSC", &tmp); |
| 262 | if (ACPI_FAILURE(status)) |
| 263 | return status; |
| 264 | mutex_lock(&osc_lock); |
Rafael J. Wysocki | ab8e895 | 2010-08-21 01:53:27 +0200 | [diff] [blame] | 265 | status = acpi_pci_query_osc(root, flags, NULL); |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 266 | mutex_unlock(&osc_lock); |
| 267 | return status; |
| 268 | } |
| 269 | |
Alex Chiang | 76d56de | 2009-07-23 17:03:00 -0600 | [diff] [blame] | 270 | struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle) |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 271 | { |
| 272 | struct acpi_pci_root *root; |
Bjorn Helgaas | c1aec83 | 2009-06-18 14:47:02 -0600 | [diff] [blame] | 273 | |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 274 | list_for_each_entry(root, &acpi_pci_roots, node) { |
| 275 | if (root->device->handle == handle) |
| 276 | return root; |
| 277 | } |
| 278 | return NULL; |
| 279 | } |
Alex Chiang | 76d56de | 2009-07-23 17:03:00 -0600 | [diff] [blame] | 280 | EXPORT_SYMBOL_GPL(acpi_pci_find_root); |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 281 | |
Alexander Chiang | 2f7bbce | 2009-06-10 19:55:20 +0000 | [diff] [blame] | 282 | struct acpi_handle_node { |
| 283 | struct list_head node; |
| 284 | acpi_handle handle; |
| 285 | }; |
| 286 | |
| 287 | /** |
| 288 | * acpi_get_pci_dev - convert ACPI CA handle to struct pci_dev |
| 289 | * @handle: the handle in question |
| 290 | * |
| 291 | * Given an ACPI CA handle, the desired PCI device is located in the |
| 292 | * list of PCI devices. |
| 293 | * |
| 294 | * If the device is found, its reference count is increased and this |
| 295 | * function returns a pointer to its data structure. The caller must |
| 296 | * decrement the reference count by calling pci_dev_put(). |
| 297 | * If no device is found, %NULL is returned. |
| 298 | */ |
| 299 | struct pci_dev *acpi_get_pci_dev(acpi_handle handle) |
| 300 | { |
| 301 | int dev, fn; |
| 302 | unsigned long long adr; |
| 303 | acpi_status status; |
| 304 | acpi_handle phandle; |
| 305 | struct pci_bus *pbus; |
| 306 | struct pci_dev *pdev = NULL; |
| 307 | struct acpi_handle_node *node, *tmp; |
| 308 | struct acpi_pci_root *root; |
| 309 | LIST_HEAD(device_list); |
| 310 | |
| 311 | /* |
| 312 | * Walk up the ACPI CA namespace until we reach a PCI root bridge. |
| 313 | */ |
| 314 | phandle = handle; |
| 315 | while (!acpi_is_root_bridge(phandle)) { |
| 316 | node = kzalloc(sizeof(struct acpi_handle_node), GFP_KERNEL); |
| 317 | if (!node) |
| 318 | goto out; |
| 319 | |
| 320 | INIT_LIST_HEAD(&node->node); |
| 321 | node->handle = phandle; |
| 322 | list_add(&node->node, &device_list); |
| 323 | |
| 324 | status = acpi_get_parent(phandle, &phandle); |
| 325 | if (ACPI_FAILURE(status)) |
| 326 | goto out; |
| 327 | } |
| 328 | |
| 329 | root = acpi_pci_find_root(phandle); |
| 330 | if (!root) |
| 331 | goto out; |
| 332 | |
| 333 | pbus = root->bus; |
| 334 | |
| 335 | /* |
| 336 | * Now, walk back down the PCI device tree until we return to our |
| 337 | * original handle. Assumes that everything between the PCI root |
| 338 | * bridge and the device we're looking for must be a P2P bridge. |
| 339 | */ |
| 340 | list_for_each_entry(node, &device_list, node) { |
| 341 | acpi_handle hnd = node->handle; |
| 342 | status = acpi_evaluate_integer(hnd, "_ADR", NULL, &adr); |
| 343 | if (ACPI_FAILURE(status)) |
| 344 | goto out; |
| 345 | dev = (adr >> 16) & 0xffff; |
| 346 | fn = adr & 0xffff; |
| 347 | |
| 348 | pdev = pci_get_slot(pbus, PCI_DEVFN(dev, fn)); |
Troy Moure | 412af97 | 2009-06-25 17:05:35 -0600 | [diff] [blame] | 349 | if (!pdev || hnd == handle) |
Alexander Chiang | 2f7bbce | 2009-06-10 19:55:20 +0000 | [diff] [blame] | 350 | break; |
| 351 | |
| 352 | pbus = pdev->subordinate; |
| 353 | pci_dev_put(pdev); |
Rafael J. Wysocki | 497fb54 | 2009-10-13 01:01:57 +0200 | [diff] [blame] | 354 | |
| 355 | /* |
| 356 | * This function may be called for a non-PCI device that has a |
| 357 | * PCI parent (eg. a disk under a PCI SATA controller). In that |
| 358 | * case pdev->subordinate will be NULL for the parent. |
| 359 | */ |
| 360 | if (!pbus) { |
| 361 | dev_dbg(&pdev->dev, "Not a PCI-to-PCI bridge\n"); |
| 362 | pdev = NULL; |
| 363 | break; |
| 364 | } |
Alexander Chiang | 2f7bbce | 2009-06-10 19:55:20 +0000 | [diff] [blame] | 365 | } |
| 366 | out: |
| 367 | list_for_each_entry_safe(node, tmp, &device_list, node) |
| 368 | kfree(node); |
| 369 | |
| 370 | return pdev; |
| 371 | } |
| 372 | EXPORT_SYMBOL_GPL(acpi_get_pci_dev); |
| 373 | |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 374 | /** |
Rafael J. Wysocki | 75fb60f | 2010-08-23 23:53:11 +0200 | [diff] [blame] | 375 | * acpi_pci_osc_control_set - Request control of PCI root _OSC features. |
| 376 | * @handle: ACPI handle of a PCI root bridge (or PCIe Root Complex). |
| 377 | * @mask: Mask of _OSC bits to request control of, place to store control mask. |
| 378 | * @req: Mask of _OSC bits the control of is essential to the caller. |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 379 | * |
Rafael J. Wysocki | 75fb60f | 2010-08-23 23:53:11 +0200 | [diff] [blame] | 380 | * Run _OSC query for @mask and if that is successful, compare the returned |
| 381 | * mask of control bits with @req. If all of the @req bits are set in the |
| 382 | * returned mask, run _OSC request for it. |
| 383 | * |
| 384 | * The variable at the @mask address may be modified regardless of whether or |
| 385 | * not the function returns success. On success it will contain the mask of |
| 386 | * _OSC bits the BIOS has granted control of, but its contents are meaningless |
| 387 | * on failure. |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 388 | **/ |
Rafael J. Wysocki | 75fb60f | 2010-08-23 23:53:11 +0200 | [diff] [blame] | 389 | acpi_status acpi_pci_osc_control_set(acpi_handle handle, u32 *mask, u32 req) |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 390 | { |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 391 | struct acpi_pci_root *root; |
Rafael J. Wysocki | 75fb60f | 2010-08-23 23:53:11 +0200 | [diff] [blame] | 392 | acpi_status status; |
| 393 | u32 ctrl, capbuf[3]; |
| 394 | acpi_handle tmp; |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 395 | |
Rafael J. Wysocki | 75fb60f | 2010-08-23 23:53:11 +0200 | [diff] [blame] | 396 | if (!mask) |
| 397 | return AE_BAD_PARAMETER; |
| 398 | |
| 399 | ctrl = *mask & OSC_PCI_CONTROL_MASKS; |
| 400 | if ((ctrl & req) != req) |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 401 | return AE_TYPE; |
| 402 | |
| 403 | root = acpi_pci_find_root(handle); |
| 404 | if (!root) |
| 405 | return AE_NOT_EXIST; |
| 406 | |
Rafael J. Wysocki | b879dc4 | 2010-08-21 01:52:37 +0200 | [diff] [blame] | 407 | status = acpi_get_handle(handle, "_OSC", &tmp); |
| 408 | if (ACPI_FAILURE(status)) |
| 409 | return status; |
| 410 | |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 411 | mutex_lock(&osc_lock); |
Rafael J. Wysocki | 75fb60f | 2010-08-23 23:53:11 +0200 | [diff] [blame] | 412 | |
| 413 | *mask = ctrl | root->osc_control_set; |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 414 | /* No need to evaluate _OSC if the control was already granted. */ |
Rafael J. Wysocki | 75fb60f | 2010-08-23 23:53:11 +0200 | [diff] [blame] | 415 | if ((root->osc_control_set & ctrl) == ctrl) |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 416 | goto out; |
| 417 | |
Rafael J. Wysocki | 75fb60f | 2010-08-23 23:53:11 +0200 | [diff] [blame] | 418 | /* Need to check the available controls bits before requesting them. */ |
| 419 | while (*mask) { |
| 420 | status = acpi_pci_query_osc(root, root->osc_support_set, mask); |
| 421 | if (ACPI_FAILURE(status)) |
| 422 | goto out; |
| 423 | if (ctrl == *mask) |
| 424 | break; |
| 425 | ctrl = *mask; |
| 426 | } |
Rafael J. Wysocki | 2b8fd91 | 2010-08-23 23:55:59 +0200 | [diff] [blame] | 427 | |
Rafael J. Wysocki | 75fb60f | 2010-08-23 23:53:11 +0200 | [diff] [blame] | 428 | if ((ctrl & req) != req) { |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 429 | status = AE_SUPPORT; |
| 430 | goto out; |
| 431 | } |
| 432 | |
| 433 | capbuf[OSC_QUERY_TYPE] = 0; |
| 434 | capbuf[OSC_SUPPORT_TYPE] = root->osc_support_set; |
Rafael J. Wysocki | 75fb60f | 2010-08-23 23:53:11 +0200 | [diff] [blame] | 435 | capbuf[OSC_CONTROL_TYPE] = ctrl; |
| 436 | status = acpi_pci_run_osc(handle, capbuf, mask); |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 437 | if (ACPI_SUCCESS(status)) |
Rafael J. Wysocki | 75fb60f | 2010-08-23 23:53:11 +0200 | [diff] [blame] | 438 | root->osc_control_set = *mask; |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 439 | out: |
| 440 | mutex_unlock(&osc_lock); |
| 441 | return status; |
| 442 | } |
Kenji Kaneshige | 9f5404d | 2009-02-09 16:00:04 +0900 | [diff] [blame] | 443 | EXPORT_SYMBOL(acpi_pci_osc_control_set); |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 444 | |
Sam Ravnborg | b5678a3 | 2008-02-17 13:23:03 +0100 | [diff] [blame] | 445 | static int __devinit acpi_pci_root_add(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 446 | { |
Bjorn Helgaas | f5eebbe | 2009-06-18 14:46:52 -0600 | [diff] [blame] | 447 | unsigned long long segment, bus; |
| 448 | acpi_status status; |
| 449 | int result; |
| 450 | struct acpi_pci_root *root; |
| 451 | acpi_handle handle; |
Rui Zhang | 2786f6e | 2006-12-21 02:21:13 -0500 | [diff] [blame] | 452 | struct acpi_device *child; |
Andrew Patterson | 0ef5f8f | 2008-11-10 15:30:50 -0700 | [diff] [blame] | 453 | u32 flags, base_flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | |
Bjorn Helgaas | 6ad9551 | 2010-03-11 12:20:06 -0700 | [diff] [blame] | 455 | root = kzalloc(sizeof(struct acpi_pci_root), GFP_KERNEL); |
| 456 | if (!root) |
| 457 | return -ENOMEM; |
| 458 | |
Bjorn Helgaas | f5eebbe | 2009-06-18 14:46:52 -0600 | [diff] [blame] | 459 | segment = 0; |
| 460 | status = acpi_evaluate_integer(device->handle, METHOD_NAME__SEG, NULL, |
| 461 | &segment); |
| 462 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { |
| 463 | printk(KERN_ERR PREFIX "can't evaluate _SEG\n"); |
Bjorn Helgaas | 6ad9551 | 2010-03-11 12:20:06 -0700 | [diff] [blame] | 464 | result = -ENODEV; |
| 465 | goto end; |
Bjorn Helgaas | f5eebbe | 2009-06-18 14:46:52 -0600 | [diff] [blame] | 466 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 467 | |
Bjorn Helgaas | f5eebbe | 2009-06-18 14:46:52 -0600 | [diff] [blame] | 468 | /* Check _CRS first, then _BBN. If no _BBN, default to zero. */ |
Bjorn Helgaas | 6ad9551 | 2010-03-11 12:20:06 -0700 | [diff] [blame] | 469 | root->secondary.flags = IORESOURCE_BUS; |
| 470 | status = try_get_root_bridge_busnr(device->handle, &root->secondary); |
Bjorn Helgaas | f5eebbe | 2009-06-18 14:46:52 -0600 | [diff] [blame] | 471 | if (ACPI_FAILURE(status)) { |
Bjorn Helgaas | 6ad9551 | 2010-03-11 12:20:06 -0700 | [diff] [blame] | 472 | /* |
| 473 | * We need both the start and end of the downstream bus range |
| 474 | * to interpret _CBA (MMCONFIG base address), so it really is |
| 475 | * supposed to be in _CRS. If we don't find it there, all we |
| 476 | * can do is assume [_BBN-0xFF] or [0-0xFF]. |
| 477 | */ |
| 478 | root->secondary.end = 0xFF; |
| 479 | printk(KERN_WARNING FW_BUG PREFIX |
| 480 | "no secondary bus range in _CRS\n"); |
Bjorn Helgaas | f5eebbe | 2009-06-18 14:46:52 -0600 | [diff] [blame] | 481 | status = acpi_evaluate_integer(device->handle, METHOD_NAME__BBN, NULL, &bus); |
Bjorn Helgaas | 6ad9551 | 2010-03-11 12:20:06 -0700 | [diff] [blame] | 482 | if (ACPI_SUCCESS(status)) |
| 483 | root->secondary.start = bus; |
| 484 | else if (status == AE_NOT_FOUND) |
| 485 | root->secondary.start = 0; |
| 486 | else { |
| 487 | printk(KERN_ERR PREFIX "can't evaluate _BBN\n"); |
| 488 | result = -ENODEV; |
| 489 | goto end; |
Bjorn Helgaas | f5eebbe | 2009-06-18 14:46:52 -0600 | [diff] [blame] | 490 | } |
| 491 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | |
Bjorn Helgaas | f5eebbe | 2009-06-18 14:46:52 -0600 | [diff] [blame] | 493 | INIT_LIST_HEAD(&root->node); |
Patrick Mochel | 32917e5 | 2006-05-19 16:54:39 -0400 | [diff] [blame] | 494 | root->device = device; |
Bjorn Helgaas | 0705495 | 2009-06-18 14:47:07 -0600 | [diff] [blame] | 495 | root->segment = segment & 0xFFFF; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 496 | strcpy(acpi_device_name(device), ACPI_PCI_ROOT_DEVICE_NAME); |
| 497 | strcpy(acpi_device_class(device), ACPI_PCI_ROOT_CLASS); |
Pavel Machek | db89b4f | 2008-09-22 14:37:34 -0700 | [diff] [blame] | 498 | device->driver_data = root; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 499 | |
Andrew Patterson | 990a7ac | 2008-11-10 15:30:45 -0700 | [diff] [blame] | 500 | /* |
| 501 | * All supported architectures that use ACPI have support for |
| 502 | * PCI domains, so we indicate this in _OSC support capabilities. |
| 503 | */ |
Andrew Patterson | 0ef5f8f | 2008-11-10 15:30:50 -0700 | [diff] [blame] | 504 | flags = base_flags = OSC_PCI_SEGMENT_GROUPS_SUPPORT; |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 505 | acpi_pci_osc_support(root, flags); |
Andrew Patterson | 990a7ac | 2008-11-10 15:30:45 -0700 | [diff] [blame] | 506 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | /* |
| 508 | * TBD: Need PCI interface for enumeration/configuration of roots. |
| 509 | */ |
| 510 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 511 | /* TBD: Locking */ |
| 512 | list_add_tail(&root->node, &acpi_pci_roots); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | |
Bjorn Helgaas | 6ad9551 | 2010-03-11 12:20:06 -0700 | [diff] [blame] | 514 | printk(KERN_INFO PREFIX "%s [%s] (domain %04x %pR)\n", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 515 | acpi_device_name(device), acpi_device_bid(device), |
Bjorn Helgaas | 6ad9551 | 2010-03-11 12:20:06 -0700 | [diff] [blame] | 516 | root->segment, &root->secondary); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | |
| 518 | /* |
| 519 | * Scan the Root Bridge |
| 520 | * -------------------- |
| 521 | * Must do this prior to any attempt to bind the root device, as the |
| 522 | * PCI namespace does not get created until this call is made (and |
| 523 | * thus the root bridge's pci_dev does not exist). |
| 524 | */ |
Bjorn Helgaas | 5728377 | 2010-03-11 12:20:11 -0700 | [diff] [blame] | 525 | root->bus = pci_acpi_scan_root(root); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | if (!root->bus) { |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 527 | printk(KERN_ERR PREFIX |
| 528 | "Bus %04x:%02x not present in PCI namespace\n", |
Bjorn Helgaas | 6ad9551 | 2010-03-11 12:20:06 -0700 | [diff] [blame] | 529 | root->segment, (unsigned int)root->secondary.start); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 530 | result = -ENODEV; |
| 531 | goto end; |
| 532 | } |
| 533 | |
| 534 | /* |
| 535 | * Attach ACPI-PCI Context |
| 536 | * ----------------------- |
| 537 | * Thus binding the ACPI and PCI devices. |
| 538 | */ |
Alexander Chiang | 499650d | 2009-06-10 19:55:30 +0000 | [diff] [blame] | 539 | result = acpi_pci_bind_root(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | if (result) |
| 541 | goto end; |
| 542 | |
| 543 | /* |
| 544 | * PCI Routing Table |
| 545 | * ----------------- |
| 546 | * Evaluate and parse _PRT, if exists. |
| 547 | */ |
Patrick Mochel | 2d1e0a0 | 2006-05-19 16:54:43 -0400 | [diff] [blame] | 548 | status = acpi_get_handle(device->handle, METHOD_NAME__PRT, &handle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 549 | if (ACPI_SUCCESS(status)) |
Alexander Chiang | 859a3f8 | 2009-06-10 19:55:35 +0000 | [diff] [blame] | 550 | result = acpi_pci_irq_add_prt(device->handle, root->bus); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | |
Rui Zhang | 2786f6e | 2006-12-21 02:21:13 -0500 | [diff] [blame] | 552 | /* |
| 553 | * Scan and bind all _ADR-Based Devices |
| 554 | */ |
| 555 | list_for_each_entry(child, &device->children, node) |
| 556 | acpi_pci_bridge_scan(child); |
| 557 | |
Andrew Patterson | 0ef5f8f | 2008-11-10 15:30:50 -0700 | [diff] [blame] | 558 | /* Indicate support for various _OSC capabilities. */ |
| 559 | if (pci_ext_cfg_avail(root->bus->self)) |
| 560 | flags |= OSC_EXT_PCI_CONFIG_SUPPORT; |
Andrew Patterson | 3e1b160 | 2008-11-10 15:30:55 -0700 | [diff] [blame] | 561 | if (pcie_aspm_enabled()) |
| 562 | flags |= OSC_ACTIVE_STATE_PWR_SUPPORT | |
| 563 | OSC_CLOCK_PWR_CAPABILITY_SUPPORT; |
Andrew Patterson | 07ae95f | 2008-11-10 15:31:05 -0700 | [diff] [blame] | 564 | if (pci_msi_enabled()) |
| 565 | flags |= OSC_MSI_SUPPORT; |
Andrew Patterson | 0ef5f8f | 2008-11-10 15:30:50 -0700 | [diff] [blame] | 566 | if (flags != base_flags) |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 567 | acpi_pci_osc_support(root, flags); |
Andrew Patterson | 0ef5f8f | 2008-11-10 15:30:50 -0700 | [diff] [blame] | 568 | |
Rafael J. Wysocki | b67ea76 | 2010-02-17 23:44:09 +0100 | [diff] [blame] | 569 | pci_acpi_add_bus_pm_notifier(device, root->bus); |
| 570 | if (device->wakeup.flags.run_wake) |
| 571 | device_set_run_wake(root->bus->bridge, true); |
| 572 | |
Bjorn Helgaas | f5eebbe | 2009-06-18 14:46:52 -0600 | [diff] [blame] | 573 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | |
Bjorn Helgaas | f5eebbe | 2009-06-18 14:46:52 -0600 | [diff] [blame] | 575 | end: |
| 576 | if (!list_empty(&root->node)) |
| 577 | list_del(&root->node); |
| 578 | kfree(root); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 579 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | } |
| 581 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 582 | static int acpi_pci_root_start(struct acpi_device *device) |
Rajesh Shah | c431ada | 2005-04-28 00:25:45 -0700 | [diff] [blame] | 583 | { |
Bjorn Helgaas | caf420c | 2009-06-18 14:46:57 -0600 | [diff] [blame] | 584 | struct acpi_pci_root *root = acpi_driver_data(device); |
Rajesh Shah | c431ada | 2005-04-28 00:25:45 -0700 | [diff] [blame] | 585 | |
Bjorn Helgaas | caf420c | 2009-06-18 14:46:57 -0600 | [diff] [blame] | 586 | pci_bus_add_devices(root->bus); |
| 587 | return 0; |
Rajesh Shah | c431ada | 2005-04-28 00:25:45 -0700 | [diff] [blame] | 588 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 589 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 590 | static int acpi_pci_root_remove(struct acpi_device *device, int type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 591 | { |
Bjorn Helgaas | caf420c | 2009-06-18 14:46:57 -0600 | [diff] [blame] | 592 | struct acpi_pci_root *root = acpi_driver_data(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | |
Rafael J. Wysocki | b67ea76 | 2010-02-17 23:44:09 +0100 | [diff] [blame] | 594 | device_set_run_wake(root->bus->bridge, false); |
| 595 | pci_acpi_remove_bus_pm_notifier(device); |
| 596 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 597 | kfree(root); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 598 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 599 | } |
| 600 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 601 | static int __init acpi_pci_root_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 602 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | if (acpi_pci_disabled) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 604 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 605 | |
Bjorn Helgaas | 7bc5e3f | 2010-02-23 10:24:41 -0700 | [diff] [blame] | 606 | pci_acpi_crs_quirks(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | if (acpi_bus_register_driver(&acpi_pci_root_driver) < 0) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 608 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 610 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 611 | } |
| 612 | |
| 613 | subsys_initcall(acpi_pci_root_init); |