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> |
| 30 | #include <linux/proc_fs.h> |
| 31 | #include <linux/spinlock.h> |
| 32 | #include <linux/pm.h> |
Rafael J. Wysocki | b67ea76 | 2010-02-17 23:44:09 +0100 | [diff] [blame] | 33 | #include <linux/pm_runtime.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | #include <linux/pci.h> |
Andrew Patterson | 990a7ac | 2008-11-10 15:30:45 -0700 | [diff] [blame] | 35 | #include <linux/pci-acpi.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include <linux/acpi.h> |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 37 | #include <linux/slab.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 38 | #include <acpi/acpi_bus.h> |
| 39 | #include <acpi/acpi_drivers.h> |
| 40 | |
Len Brown | a192a95 | 2009-07-28 16:45:54 -0400 | [diff] [blame] | 41 | #define PREFIX "ACPI: " |
| 42 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #define _COMPONENT ACPI_PCI_COMPONENT |
Len Brown | f52fd66 | 2007-02-12 22:42:12 -0500 | [diff] [blame] | 44 | ACPI_MODULE_NAME("pci_root"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 45 | #define ACPI_PCI_ROOT_CLASS "pci_bridge" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 46 | #define ACPI_PCI_ROOT_DEVICE_NAME "PCI Root Bridge" |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 47 | static int acpi_pci_root_add(struct acpi_device *device); |
| 48 | static int acpi_pci_root_remove(struct acpi_device *device, int type); |
| 49 | static int acpi_pci_root_start(struct acpi_device *device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | |
Márton Németh | c97adf9 | 2010-01-10 17:15:36 +0100 | [diff] [blame] | 51 | static const struct acpi_device_id root_device_ids[] = { |
Thomas Renninger | 1ba90e3 | 2007-07-23 14:44:41 +0200 | [diff] [blame] | 52 | {"PNP0A03", 0}, |
| 53 | {"", 0}, |
| 54 | }; |
| 55 | MODULE_DEVICE_TABLE(acpi, root_device_ids); |
| 56 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 57 | static struct acpi_driver acpi_pci_root_driver = { |
Len Brown | c2b6705b | 2007-02-12 23:33:40 -0500 | [diff] [blame] | 58 | .name = "pci_root", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 59 | .class = ACPI_PCI_ROOT_CLASS, |
Thomas Renninger | 1ba90e3 | 2007-07-23 14:44:41 +0200 | [diff] [blame] | 60 | .ids = root_device_ids, |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 61 | .ops = { |
| 62 | .add = acpi_pci_root_add, |
| 63 | .remove = acpi_pci_root_remove, |
| 64 | .start = acpi_pci_root_start, |
| 65 | }, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | }; |
| 67 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | static LIST_HEAD(acpi_pci_roots); |
| 69 | |
| 70 | static struct acpi_pci_driver *sub_driver; |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 71 | static DEFINE_MUTEX(osc_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | |
| 73 | int acpi_pci_register_driver(struct acpi_pci_driver *driver) |
| 74 | { |
| 75 | int n = 0; |
Bjorn Helgaas | c1aec83 | 2009-06-18 14:47:02 -0600 | [diff] [blame] | 76 | struct acpi_pci_root *root; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 77 | |
| 78 | struct acpi_pci_driver **pptr = &sub_driver; |
| 79 | while (*pptr) |
| 80 | pptr = &(*pptr)->next; |
| 81 | *pptr = driver; |
| 82 | |
| 83 | if (!driver->add) |
| 84 | return 0; |
| 85 | |
Bjorn Helgaas | c1aec83 | 2009-06-18 14:47:02 -0600 | [diff] [blame] | 86 | list_for_each_entry(root, &acpi_pci_roots, node) { |
Patrick Mochel | 2d1e0a0 | 2006-05-19 16:54:43 -0400 | [diff] [blame] | 87 | driver->add(root->device->handle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | n++; |
| 89 | } |
| 90 | |
| 91 | return n; |
| 92 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 93 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | EXPORT_SYMBOL(acpi_pci_register_driver); |
| 95 | |
| 96 | void acpi_pci_unregister_driver(struct acpi_pci_driver *driver) |
| 97 | { |
Bjorn Helgaas | c1aec83 | 2009-06-18 14:47:02 -0600 | [diff] [blame] | 98 | struct acpi_pci_root *root; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 99 | |
| 100 | struct acpi_pci_driver **pptr = &sub_driver; |
| 101 | while (*pptr) { |
Akinobu Mita | f10bb25 | 2006-12-19 12:56:09 -0800 | [diff] [blame] | 102 | if (*pptr == driver) |
| 103 | break; |
| 104 | pptr = &(*pptr)->next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | } |
Akinobu Mita | f10bb25 | 2006-12-19 12:56:09 -0800 | [diff] [blame] | 106 | BUG_ON(!*pptr); |
| 107 | *pptr = (*pptr)->next; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | |
| 109 | if (!driver->remove) |
| 110 | return; |
| 111 | |
Bjorn Helgaas | c1aec83 | 2009-06-18 14:47:02 -0600 | [diff] [blame] | 112 | list_for_each_entry(root, &acpi_pci_roots, node) |
Patrick Mochel | 2d1e0a0 | 2006-05-19 16:54:43 -0400 | [diff] [blame] | 113 | driver->remove(root->device->handle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 115 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | EXPORT_SYMBOL(acpi_pci_unregister_driver); |
| 117 | |
Justin Chen | d91a007 | 2006-12-06 10:17:10 -0700 | [diff] [blame] | 118 | acpi_handle acpi_get_pci_rootbridge_handle(unsigned int seg, unsigned int bus) |
| 119 | { |
Bjorn Helgaas | c1aec83 | 2009-06-18 14:47:02 -0600 | [diff] [blame] | 120 | struct acpi_pci_root *root; |
Justin Chen | d91a007 | 2006-12-06 10:17:10 -0700 | [diff] [blame] | 121 | |
Bjorn Helgaas | c1aec83 | 2009-06-18 14:47:02 -0600 | [diff] [blame] | 122 | list_for_each_entry(root, &acpi_pci_roots, node) |
Bjorn Helgaas | 6ad9551 | 2010-03-11 12:20:06 -0700 | [diff] [blame] | 123 | if ((root->segment == (u16) seg) && |
| 124 | (root->secondary.start == (u16) bus)) |
Bjorn Helgaas | c1aec83 | 2009-06-18 14:47:02 -0600 | [diff] [blame] | 125 | return root->device->handle; |
Justin Chen | d91a007 | 2006-12-06 10:17:10 -0700 | [diff] [blame] | 126 | return NULL; |
| 127 | } |
| 128 | |
| 129 | EXPORT_SYMBOL_GPL(acpi_get_pci_rootbridge_handle); |
| 130 | |
Alexander Chiang | 2755820 | 2009-06-10 19:55:14 +0000 | [diff] [blame] | 131 | /** |
| 132 | * acpi_is_root_bridge - determine whether an ACPI CA node is a PCI root bridge |
| 133 | * @handle - the ACPI CA node in question. |
| 134 | * |
| 135 | * Note: we could make this API take a struct acpi_device * instead, but |
| 136 | * for now, it's more convenient to operate on an acpi_handle. |
| 137 | */ |
| 138 | int acpi_is_root_bridge(acpi_handle handle) |
| 139 | { |
| 140 | int ret; |
| 141 | struct acpi_device *device; |
| 142 | |
| 143 | ret = acpi_bus_get_device(handle, &device); |
| 144 | if (ret) |
| 145 | return 0; |
| 146 | |
| 147 | ret = acpi_match_device_ids(device, root_device_ids); |
| 148 | if (ret) |
| 149 | return 0; |
| 150 | else |
| 151 | return 1; |
| 152 | } |
| 153 | EXPORT_SYMBOL_GPL(acpi_is_root_bridge); |
| 154 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | static acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 156 | get_root_bridge_busnr_callback(struct acpi_resource *resource, void *data) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | { |
Bjorn Helgaas | 6ad9551 | 2010-03-11 12:20:06 -0700 | [diff] [blame] | 158 | struct resource *res = data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | struct acpi_resource_address64 address; |
| 160 | |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame] | 161 | if (resource->type != ACPI_RESOURCE_TYPE_ADDRESS16 && |
| 162 | resource->type != ACPI_RESOURCE_TYPE_ADDRESS32 && |
| 163 | resource->type != ACPI_RESOURCE_TYPE_ADDRESS64) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 164 | return AE_OK; |
| 165 | |
| 166 | acpi_resource_to_address64(resource, &address); |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 167 | if ((address.address_length > 0) && |
Bjorn Helgaas | 6ad9551 | 2010-03-11 12:20:06 -0700 | [diff] [blame] | 168 | (address.resource_type == ACPI_BUS_NUMBER_RANGE)) { |
| 169 | res->start = address.minimum; |
| 170 | res->end = address.minimum + address.address_length - 1; |
| 171 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 172 | |
| 173 | return AE_OK; |
| 174 | } |
| 175 | |
Bjorn Helgaas | f5eebbe | 2009-06-18 14:46:52 -0600 | [diff] [blame] | 176 | static acpi_status try_get_root_bridge_busnr(acpi_handle handle, |
Bjorn Helgaas | 6ad9551 | 2010-03-11 12:20:06 -0700 | [diff] [blame] | 177 | struct resource *res) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | { |
| 179 | acpi_status status; |
| 180 | |
Bjorn Helgaas | 6ad9551 | 2010-03-11 12:20:06 -0700 | [diff] [blame] | 181 | res->start = -1; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 182 | status = |
| 183 | acpi_walk_resources(handle, METHOD_NAME__CRS, |
Bjorn Helgaas | 6ad9551 | 2010-03-11 12:20:06 -0700 | [diff] [blame] | 184 | get_root_bridge_busnr_callback, res); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | if (ACPI_FAILURE(status)) |
| 186 | return status; |
Bjorn Helgaas | 6ad9551 | 2010-03-11 12:20:06 -0700 | [diff] [blame] | 187 | if (res->start == -1) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | return AE_ERROR; |
| 189 | return AE_OK; |
| 190 | } |
| 191 | |
Rui Zhang | 2786f6e | 2006-12-21 02:21:13 -0500 | [diff] [blame] | 192 | static void acpi_pci_bridge_scan(struct acpi_device *device) |
| 193 | { |
| 194 | int status; |
| 195 | struct acpi_device *child = NULL; |
| 196 | |
| 197 | if (device->flags.bus_address) |
| 198 | if (device->parent && device->parent->ops.bind) { |
| 199 | status = device->parent->ops.bind(device); |
| 200 | if (!status) { |
| 201 | list_for_each_entry(child, &device->children, node) |
| 202 | acpi_pci_bridge_scan(child); |
| 203 | } |
| 204 | } |
| 205 | } |
| 206 | |
Shaohua Li | 3a9622d | 2009-10-29 11:04:50 +0800 | [diff] [blame] | 207 | static u8 pci_osc_uuid_str[] = "33DB4D5B-1FF7-401C-9657-7441C03DD766"; |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 208 | |
| 209 | static acpi_status acpi_pci_run_osc(acpi_handle handle, |
| 210 | const u32 *capbuf, u32 *retval) |
| 211 | { |
Shaohua Li | 3a9622d | 2009-10-29 11:04:50 +0800 | [diff] [blame] | 212 | struct acpi_osc_context context = { |
| 213 | .uuid_str = pci_osc_uuid_str, |
| 214 | .rev = 1, |
| 215 | .cap.length = 12, |
| 216 | .cap.pointer = (void *)capbuf, |
| 217 | }; |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 218 | acpi_status status; |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 219 | |
Shaohua Li | 3a9622d | 2009-10-29 11:04:50 +0800 | [diff] [blame] | 220 | status = acpi_run_osc(handle, &context); |
| 221 | if (ACPI_SUCCESS(status)) { |
| 222 | *retval = *((u32 *)(context.ret.pointer + 8)); |
| 223 | kfree(context.ret.pointer); |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 224 | } |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 225 | return status; |
| 226 | } |
| 227 | |
| 228 | static acpi_status acpi_pci_query_osc(struct acpi_pci_root *root, u32 flags) |
| 229 | { |
| 230 | acpi_status status; |
| 231 | u32 support_set, result, capbuf[3]; |
| 232 | |
| 233 | /* do _OSC query for all possible controls */ |
Shaohua Li | 3a9622d | 2009-10-29 11:04:50 +0800 | [diff] [blame] | 234 | support_set = root->osc_support_set | (flags & OSC_PCI_SUPPORT_MASKS); |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 235 | capbuf[OSC_QUERY_TYPE] = OSC_QUERY_ENABLE; |
| 236 | capbuf[OSC_SUPPORT_TYPE] = support_set; |
Shaohua Li | 3a9622d | 2009-10-29 11:04:50 +0800 | [diff] [blame] | 237 | capbuf[OSC_CONTROL_TYPE] = OSC_PCI_CONTROL_MASKS; |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 238 | |
| 239 | status = acpi_pci_run_osc(root->device->handle, capbuf, &result); |
| 240 | if (ACPI_SUCCESS(status)) { |
| 241 | root->osc_support_set = support_set; |
| 242 | root->osc_control_qry = result; |
| 243 | root->osc_queried = 1; |
| 244 | } |
| 245 | return status; |
| 246 | } |
| 247 | |
| 248 | static acpi_status acpi_pci_osc_support(struct acpi_pci_root *root, u32 flags) |
| 249 | { |
| 250 | acpi_status status; |
| 251 | acpi_handle tmp; |
| 252 | |
| 253 | status = acpi_get_handle(root->device->handle, "_OSC", &tmp); |
| 254 | if (ACPI_FAILURE(status)) |
| 255 | return status; |
| 256 | mutex_lock(&osc_lock); |
| 257 | status = acpi_pci_query_osc(root, flags); |
| 258 | mutex_unlock(&osc_lock); |
| 259 | return status; |
| 260 | } |
| 261 | |
Alex Chiang | 76d56de | 2009-07-23 17:03:00 -0600 | [diff] [blame] | 262 | struct acpi_pci_root *acpi_pci_find_root(acpi_handle handle) |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 263 | { |
| 264 | struct acpi_pci_root *root; |
Bjorn Helgaas | c1aec83 | 2009-06-18 14:47:02 -0600 | [diff] [blame] | 265 | |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 266 | list_for_each_entry(root, &acpi_pci_roots, node) { |
| 267 | if (root->device->handle == handle) |
| 268 | return root; |
| 269 | } |
| 270 | return NULL; |
| 271 | } |
Alex Chiang | 76d56de | 2009-07-23 17:03:00 -0600 | [diff] [blame] | 272 | EXPORT_SYMBOL_GPL(acpi_pci_find_root); |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 273 | |
Alexander Chiang | 2f7bbce | 2009-06-10 19:55:20 +0000 | [diff] [blame] | 274 | struct acpi_handle_node { |
| 275 | struct list_head node; |
| 276 | acpi_handle handle; |
| 277 | }; |
| 278 | |
| 279 | /** |
| 280 | * acpi_get_pci_dev - convert ACPI CA handle to struct pci_dev |
| 281 | * @handle: the handle in question |
| 282 | * |
| 283 | * Given an ACPI CA handle, the desired PCI device is located in the |
| 284 | * list of PCI devices. |
| 285 | * |
| 286 | * If the device is found, its reference count is increased and this |
| 287 | * function returns a pointer to its data structure. The caller must |
| 288 | * decrement the reference count by calling pci_dev_put(). |
| 289 | * If no device is found, %NULL is returned. |
| 290 | */ |
| 291 | struct pci_dev *acpi_get_pci_dev(acpi_handle handle) |
| 292 | { |
| 293 | int dev, fn; |
| 294 | unsigned long long adr; |
| 295 | acpi_status status; |
| 296 | acpi_handle phandle; |
| 297 | struct pci_bus *pbus; |
| 298 | struct pci_dev *pdev = NULL; |
| 299 | struct acpi_handle_node *node, *tmp; |
| 300 | struct acpi_pci_root *root; |
| 301 | LIST_HEAD(device_list); |
| 302 | |
| 303 | /* |
| 304 | * Walk up the ACPI CA namespace until we reach a PCI root bridge. |
| 305 | */ |
| 306 | phandle = handle; |
| 307 | while (!acpi_is_root_bridge(phandle)) { |
| 308 | node = kzalloc(sizeof(struct acpi_handle_node), GFP_KERNEL); |
| 309 | if (!node) |
| 310 | goto out; |
| 311 | |
| 312 | INIT_LIST_HEAD(&node->node); |
| 313 | node->handle = phandle; |
| 314 | list_add(&node->node, &device_list); |
| 315 | |
| 316 | status = acpi_get_parent(phandle, &phandle); |
| 317 | if (ACPI_FAILURE(status)) |
| 318 | goto out; |
| 319 | } |
| 320 | |
| 321 | root = acpi_pci_find_root(phandle); |
| 322 | if (!root) |
| 323 | goto out; |
| 324 | |
| 325 | pbus = root->bus; |
| 326 | |
| 327 | /* |
| 328 | * Now, walk back down the PCI device tree until we return to our |
| 329 | * original handle. Assumes that everything between the PCI root |
| 330 | * bridge and the device we're looking for must be a P2P bridge. |
| 331 | */ |
| 332 | list_for_each_entry(node, &device_list, node) { |
| 333 | acpi_handle hnd = node->handle; |
| 334 | status = acpi_evaluate_integer(hnd, "_ADR", NULL, &adr); |
| 335 | if (ACPI_FAILURE(status)) |
| 336 | goto out; |
| 337 | dev = (adr >> 16) & 0xffff; |
| 338 | fn = adr & 0xffff; |
| 339 | |
| 340 | pdev = pci_get_slot(pbus, PCI_DEVFN(dev, fn)); |
Troy Moure | 412af97 | 2009-06-25 17:05:35 -0600 | [diff] [blame] | 341 | if (!pdev || hnd == handle) |
Alexander Chiang | 2f7bbce | 2009-06-10 19:55:20 +0000 | [diff] [blame] | 342 | break; |
| 343 | |
| 344 | pbus = pdev->subordinate; |
| 345 | pci_dev_put(pdev); |
Rafael J. Wysocki | 497fb54 | 2009-10-13 01:01:57 +0200 | [diff] [blame] | 346 | |
| 347 | /* |
| 348 | * This function may be called for a non-PCI device that has a |
| 349 | * PCI parent (eg. a disk under a PCI SATA controller). In that |
| 350 | * case pdev->subordinate will be NULL for the parent. |
| 351 | */ |
| 352 | if (!pbus) { |
| 353 | dev_dbg(&pdev->dev, "Not a PCI-to-PCI bridge\n"); |
| 354 | pdev = NULL; |
| 355 | break; |
| 356 | } |
Alexander Chiang | 2f7bbce | 2009-06-10 19:55:20 +0000 | [diff] [blame] | 357 | } |
| 358 | out: |
| 359 | list_for_each_entry_safe(node, tmp, &device_list, node) |
| 360 | kfree(node); |
| 361 | |
| 362 | return pdev; |
| 363 | } |
| 364 | EXPORT_SYMBOL_GPL(acpi_get_pci_dev); |
| 365 | |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 366 | /** |
Kenji Kaneshige | 9f5404d | 2009-02-09 16:00:04 +0900 | [diff] [blame] | 367 | * acpi_pci_osc_control_set - commit requested control to Firmware |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 368 | * @handle: acpi_handle for the target ACPI object |
| 369 | * @flags: driver's requested control bits |
| 370 | * |
| 371 | * Attempt to take control from Firmware on requested control bits. |
| 372 | **/ |
Kenji Kaneshige | 9f5404d | 2009-02-09 16:00:04 +0900 | [diff] [blame] | 373 | acpi_status acpi_pci_osc_control_set(acpi_handle handle, u32 flags) |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 374 | { |
| 375 | acpi_status status; |
| 376 | u32 control_req, result, capbuf[3]; |
| 377 | acpi_handle tmp; |
| 378 | struct acpi_pci_root *root; |
| 379 | |
| 380 | status = acpi_get_handle(handle, "_OSC", &tmp); |
| 381 | if (ACPI_FAILURE(status)) |
| 382 | return status; |
| 383 | |
Shaohua Li | 3a9622d | 2009-10-29 11:04:50 +0800 | [diff] [blame] | 384 | control_req = (flags & OSC_PCI_CONTROL_MASKS); |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 385 | if (!control_req) |
| 386 | return AE_TYPE; |
| 387 | |
| 388 | root = acpi_pci_find_root(handle); |
| 389 | if (!root) |
| 390 | return AE_NOT_EXIST; |
| 391 | |
| 392 | mutex_lock(&osc_lock); |
| 393 | /* No need to evaluate _OSC if the control was already granted. */ |
| 394 | if ((root->osc_control_set & control_req) == control_req) |
| 395 | goto out; |
| 396 | |
| 397 | /* Need to query controls first before requesting them */ |
| 398 | if (!root->osc_queried) { |
| 399 | status = acpi_pci_query_osc(root, root->osc_support_set); |
| 400 | if (ACPI_FAILURE(status)) |
| 401 | goto out; |
| 402 | } |
| 403 | if ((root->osc_control_qry & control_req) != control_req) { |
| 404 | printk(KERN_DEBUG |
| 405 | "Firmware did not grant requested _OSC control\n"); |
| 406 | status = AE_SUPPORT; |
| 407 | goto out; |
| 408 | } |
| 409 | |
| 410 | capbuf[OSC_QUERY_TYPE] = 0; |
| 411 | capbuf[OSC_SUPPORT_TYPE] = root->osc_support_set; |
| 412 | capbuf[OSC_CONTROL_TYPE] = root->osc_control_set | control_req; |
| 413 | status = acpi_pci_run_osc(handle, capbuf, &result); |
| 414 | if (ACPI_SUCCESS(status)) |
| 415 | root->osc_control_set = result; |
| 416 | out: |
| 417 | mutex_unlock(&osc_lock); |
| 418 | return status; |
| 419 | } |
Kenji Kaneshige | 9f5404d | 2009-02-09 16:00:04 +0900 | [diff] [blame] | 420 | EXPORT_SYMBOL(acpi_pci_osc_control_set); |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 421 | |
Sam Ravnborg | b5678a3 | 2008-02-17 13:23:03 +0100 | [diff] [blame] | 422 | static int __devinit acpi_pci_root_add(struct acpi_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | { |
Bjorn Helgaas | f5eebbe | 2009-06-18 14:46:52 -0600 | [diff] [blame] | 424 | unsigned long long segment, bus; |
| 425 | acpi_status status; |
| 426 | int result; |
| 427 | struct acpi_pci_root *root; |
| 428 | acpi_handle handle; |
Rui Zhang | 2786f6e | 2006-12-21 02:21:13 -0500 | [diff] [blame] | 429 | struct acpi_device *child; |
Andrew Patterson | 0ef5f8f | 2008-11-10 15:30:50 -0700 | [diff] [blame] | 430 | u32 flags, base_flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 431 | |
Bjorn Helgaas | 6ad9551 | 2010-03-11 12:20:06 -0700 | [diff] [blame] | 432 | root = kzalloc(sizeof(struct acpi_pci_root), GFP_KERNEL); |
| 433 | if (!root) |
| 434 | return -ENOMEM; |
| 435 | |
Bjorn Helgaas | f5eebbe | 2009-06-18 14:46:52 -0600 | [diff] [blame] | 436 | segment = 0; |
| 437 | status = acpi_evaluate_integer(device->handle, METHOD_NAME__SEG, NULL, |
| 438 | &segment); |
| 439 | if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) { |
| 440 | printk(KERN_ERR PREFIX "can't evaluate _SEG\n"); |
Bjorn Helgaas | 6ad9551 | 2010-03-11 12:20:06 -0700 | [diff] [blame] | 441 | result = -ENODEV; |
| 442 | goto end; |
Bjorn Helgaas | f5eebbe | 2009-06-18 14:46:52 -0600 | [diff] [blame] | 443 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 444 | |
Bjorn Helgaas | f5eebbe | 2009-06-18 14:46:52 -0600 | [diff] [blame] | 445 | /* Check _CRS first, then _BBN. If no _BBN, default to zero. */ |
Bjorn Helgaas | 6ad9551 | 2010-03-11 12:20:06 -0700 | [diff] [blame] | 446 | root->secondary.flags = IORESOURCE_BUS; |
| 447 | status = try_get_root_bridge_busnr(device->handle, &root->secondary); |
Bjorn Helgaas | f5eebbe | 2009-06-18 14:46:52 -0600 | [diff] [blame] | 448 | if (ACPI_FAILURE(status)) { |
Bjorn Helgaas | 6ad9551 | 2010-03-11 12:20:06 -0700 | [diff] [blame] | 449 | /* |
| 450 | * We need both the start and end of the downstream bus range |
| 451 | * to interpret _CBA (MMCONFIG base address), so it really is |
| 452 | * supposed to be in _CRS. If we don't find it there, all we |
| 453 | * can do is assume [_BBN-0xFF] or [0-0xFF]. |
| 454 | */ |
| 455 | root->secondary.end = 0xFF; |
| 456 | printk(KERN_WARNING FW_BUG PREFIX |
| 457 | "no secondary bus range in _CRS\n"); |
Bjorn Helgaas | f5eebbe | 2009-06-18 14:46:52 -0600 | [diff] [blame] | 458 | status = acpi_evaluate_integer(device->handle, METHOD_NAME__BBN, NULL, &bus); |
Bjorn Helgaas | 6ad9551 | 2010-03-11 12:20:06 -0700 | [diff] [blame] | 459 | if (ACPI_SUCCESS(status)) |
| 460 | root->secondary.start = bus; |
| 461 | else if (status == AE_NOT_FOUND) |
| 462 | root->secondary.start = 0; |
| 463 | else { |
| 464 | printk(KERN_ERR PREFIX "can't evaluate _BBN\n"); |
| 465 | result = -ENODEV; |
| 466 | goto end; |
Bjorn Helgaas | f5eebbe | 2009-06-18 14:46:52 -0600 | [diff] [blame] | 467 | } |
| 468 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 469 | |
Bjorn Helgaas | f5eebbe | 2009-06-18 14:46:52 -0600 | [diff] [blame] | 470 | INIT_LIST_HEAD(&root->node); |
Patrick Mochel | 32917e5 | 2006-05-19 16:54:39 -0400 | [diff] [blame] | 471 | root->device = device; |
Bjorn Helgaas | 0705495 | 2009-06-18 14:47:07 -0600 | [diff] [blame] | 472 | root->segment = segment & 0xFFFF; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 473 | strcpy(acpi_device_name(device), ACPI_PCI_ROOT_DEVICE_NAME); |
| 474 | strcpy(acpi_device_class(device), ACPI_PCI_ROOT_CLASS); |
Pavel Machek | db89b4f | 2008-09-22 14:37:34 -0700 | [diff] [blame] | 475 | device->driver_data = root; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | |
Andrew Patterson | 990a7ac | 2008-11-10 15:30:45 -0700 | [diff] [blame] | 477 | /* |
| 478 | * All supported architectures that use ACPI have support for |
| 479 | * PCI domains, so we indicate this in _OSC support capabilities. |
| 480 | */ |
Andrew Patterson | 0ef5f8f | 2008-11-10 15:30:50 -0700 | [diff] [blame] | 481 | flags = base_flags = OSC_PCI_SEGMENT_GROUPS_SUPPORT; |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 482 | acpi_pci_osc_support(root, flags); |
Andrew Patterson | 990a7ac | 2008-11-10 15:30:45 -0700 | [diff] [blame] | 483 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | /* |
| 485 | * TBD: Need PCI interface for enumeration/configuration of roots. |
| 486 | */ |
| 487 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 488 | /* TBD: Locking */ |
| 489 | list_add_tail(&root->node, &acpi_pci_roots); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 490 | |
Bjorn Helgaas | 6ad9551 | 2010-03-11 12:20:06 -0700 | [diff] [blame] | 491 | printk(KERN_INFO PREFIX "%s [%s] (domain %04x %pR)\n", |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 492 | acpi_device_name(device), acpi_device_bid(device), |
Bjorn Helgaas | 6ad9551 | 2010-03-11 12:20:06 -0700 | [diff] [blame] | 493 | root->segment, &root->secondary); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 494 | |
| 495 | /* |
| 496 | * Scan the Root Bridge |
| 497 | * -------------------- |
| 498 | * Must do this prior to any attempt to bind the root device, as the |
| 499 | * PCI namespace does not get created until this call is made (and |
| 500 | * thus the root bridge's pci_dev does not exist). |
| 501 | */ |
Bjorn Helgaas | 5728377 | 2010-03-11 12:20:11 -0700 | [diff] [blame] | 502 | root->bus = pci_acpi_scan_root(root); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 503 | if (!root->bus) { |
Len Brown | 6468463 | 2006-06-26 23:41:38 -0400 | [diff] [blame] | 504 | printk(KERN_ERR PREFIX |
| 505 | "Bus %04x:%02x not present in PCI namespace\n", |
Bjorn Helgaas | 6ad9551 | 2010-03-11 12:20:06 -0700 | [diff] [blame] | 506 | root->segment, (unsigned int)root->secondary.start); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | result = -ENODEV; |
| 508 | goto end; |
| 509 | } |
| 510 | |
| 511 | /* |
| 512 | * Attach ACPI-PCI Context |
| 513 | * ----------------------- |
| 514 | * Thus binding the ACPI and PCI devices. |
| 515 | */ |
Alexander Chiang | 499650d | 2009-06-10 19:55:30 +0000 | [diff] [blame] | 516 | result = acpi_pci_bind_root(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 517 | if (result) |
| 518 | goto end; |
| 519 | |
| 520 | /* |
| 521 | * PCI Routing Table |
| 522 | * ----------------- |
| 523 | * Evaluate and parse _PRT, if exists. |
| 524 | */ |
Patrick Mochel | 2d1e0a0 | 2006-05-19 16:54:43 -0400 | [diff] [blame] | 525 | status = acpi_get_handle(device->handle, METHOD_NAME__PRT, &handle); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | if (ACPI_SUCCESS(status)) |
Alexander Chiang | 859a3f8 | 2009-06-10 19:55:35 +0000 | [diff] [blame] | 527 | result = acpi_pci_irq_add_prt(device->handle, root->bus); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 528 | |
Rui Zhang | 2786f6e | 2006-12-21 02:21:13 -0500 | [diff] [blame] | 529 | /* |
| 530 | * Scan and bind all _ADR-Based Devices |
| 531 | */ |
| 532 | list_for_each_entry(child, &device->children, node) |
| 533 | acpi_pci_bridge_scan(child); |
| 534 | |
Andrew Patterson | 0ef5f8f | 2008-11-10 15:30:50 -0700 | [diff] [blame] | 535 | /* Indicate support for various _OSC capabilities. */ |
| 536 | if (pci_ext_cfg_avail(root->bus->self)) |
| 537 | flags |= OSC_EXT_PCI_CONFIG_SUPPORT; |
Andrew Patterson | 3e1b160 | 2008-11-10 15:30:55 -0700 | [diff] [blame] | 538 | if (pcie_aspm_enabled()) |
| 539 | flags |= OSC_ACTIVE_STATE_PWR_SUPPORT | |
| 540 | OSC_CLOCK_PWR_CAPABILITY_SUPPORT; |
Andrew Patterson | 07ae95f | 2008-11-10 15:31:05 -0700 | [diff] [blame] | 541 | if (pci_msi_enabled()) |
| 542 | flags |= OSC_MSI_SUPPORT; |
Andrew Patterson | 0ef5f8f | 2008-11-10 15:30:50 -0700 | [diff] [blame] | 543 | if (flags != base_flags) |
Kenji Kaneshige | 63f10f0 | 2009-02-09 15:59:29 +0900 | [diff] [blame] | 544 | acpi_pci_osc_support(root, flags); |
Andrew Patterson | 0ef5f8f | 2008-11-10 15:30:50 -0700 | [diff] [blame] | 545 | |
Rafael J. Wysocki | b67ea76 | 2010-02-17 23:44:09 +0100 | [diff] [blame] | 546 | pci_acpi_add_bus_pm_notifier(device, root->bus); |
| 547 | if (device->wakeup.flags.run_wake) |
| 548 | device_set_run_wake(root->bus->bridge, true); |
| 549 | |
Bjorn Helgaas | f5eebbe | 2009-06-18 14:46:52 -0600 | [diff] [blame] | 550 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | |
Bjorn Helgaas | f5eebbe | 2009-06-18 14:46:52 -0600 | [diff] [blame] | 552 | end: |
| 553 | if (!list_empty(&root->node)) |
| 554 | list_del(&root->node); |
| 555 | kfree(root); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 556 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 557 | } |
| 558 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 559 | static int acpi_pci_root_start(struct acpi_device *device) |
Rajesh Shah | c431ada | 2005-04-28 00:25:45 -0700 | [diff] [blame] | 560 | { |
Bjorn Helgaas | caf420c | 2009-06-18 14:46:57 -0600 | [diff] [blame] | 561 | struct acpi_pci_root *root = acpi_driver_data(device); |
Rajesh Shah | c431ada | 2005-04-28 00:25:45 -0700 | [diff] [blame] | 562 | |
Bjorn Helgaas | caf420c | 2009-06-18 14:46:57 -0600 | [diff] [blame] | 563 | pci_bus_add_devices(root->bus); |
| 564 | return 0; |
Rajesh Shah | c431ada | 2005-04-28 00:25:45 -0700 | [diff] [blame] | 565 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 566 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 567 | static int acpi_pci_root_remove(struct acpi_device *device, int type) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 568 | { |
Bjorn Helgaas | caf420c | 2009-06-18 14:46:57 -0600 | [diff] [blame] | 569 | struct acpi_pci_root *root = acpi_driver_data(device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 570 | |
Rafael J. Wysocki | b67ea76 | 2010-02-17 23:44:09 +0100 | [diff] [blame] | 571 | device_set_run_wake(root->bus->bridge, false); |
| 572 | pci_acpi_remove_bus_pm_notifier(device); |
| 573 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 574 | kfree(root); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 575 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | } |
| 577 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 578 | static int __init acpi_pci_root_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 579 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 580 | if (acpi_pci_disabled) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 581 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | |
Bjorn Helgaas | 7bc5e3f | 2010-02-23 10:24:41 -0700 | [diff] [blame] | 583 | pci_acpi_crs_quirks(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | if (acpi_bus_register_driver(&acpi_pci_root_driver) < 0) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 585 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 586 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 587 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 588 | } |
| 589 | |
| 590 | subsys_initcall(acpi_pci_root_init); |