Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * pci_bind.c - ACPI PCI Device Binding ($Revision: 2 $) |
| 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> |
| 33 | #include <linux/pci.h> |
| 34 | #include <linux/acpi.h> |
| 35 | #include <acpi/acpi_bus.h> |
| 36 | #include <acpi/acpi_drivers.h> |
| 37 | |
| 38 | |
| 39 | #define _COMPONENT ACPI_PCI_COMPONENT |
| 40 | ACPI_MODULE_NAME ("pci_bind") |
| 41 | |
| 42 | struct acpi_pci_data { |
| 43 | struct acpi_pci_id id; |
| 44 | struct pci_bus *bus; |
| 45 | struct pci_dev *dev; |
| 46 | }; |
| 47 | |
| 48 | |
| 49 | void |
| 50 | acpi_pci_data_handler ( |
| 51 | acpi_handle handle, |
| 52 | u32 function, |
| 53 | void *context) |
| 54 | { |
| 55 | ACPI_FUNCTION_TRACE("acpi_pci_data_handler"); |
| 56 | |
| 57 | /* TBD: Anything we need to do here? */ |
| 58 | |
| 59 | return_VOID; |
| 60 | } |
| 61 | |
| 62 | |
| 63 | /** |
| 64 | * acpi_os_get_pci_id |
| 65 | * ------------------ |
| 66 | * This function is used by the ACPI Interpreter (a.k.a. Core Subsystem) |
| 67 | * to resolve PCI information for ACPI-PCI devices defined in the namespace. |
| 68 | * This typically occurs when resolving PCI operation region information. |
| 69 | */ |
| 70 | #ifdef ACPI_FUTURE_USAGE |
| 71 | acpi_status |
| 72 | acpi_os_get_pci_id ( |
| 73 | acpi_handle handle, |
| 74 | struct acpi_pci_id *id) |
| 75 | { |
| 76 | int result = 0; |
| 77 | acpi_status status = AE_OK; |
| 78 | struct acpi_device *device = NULL; |
| 79 | struct acpi_pci_data *data = NULL; |
| 80 | |
| 81 | ACPI_FUNCTION_TRACE("acpi_os_get_pci_id"); |
| 82 | |
| 83 | if (!id) |
| 84 | return_ACPI_STATUS(AE_BAD_PARAMETER); |
| 85 | |
| 86 | result = acpi_bus_get_device(handle, &device); |
| 87 | if (result) { |
| 88 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| 89 | "Invalid ACPI Bus context for device %s\n", |
| 90 | acpi_device_bid(device))); |
| 91 | return_ACPI_STATUS(AE_NOT_EXIST); |
| 92 | } |
| 93 | |
| 94 | status = acpi_get_data(handle, acpi_pci_data_handler, (void**) &data); |
| 95 | if (ACPI_FAILURE(status) || !data || !data->dev) { |
| 96 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| 97 | "Invalid ACPI-PCI context for device %s\n", |
| 98 | acpi_device_bid(device))); |
| 99 | return_ACPI_STATUS(status); |
| 100 | } |
| 101 | |
| 102 | *id = data->id; |
| 103 | |
| 104 | /* |
| 105 | id->segment = data->id.segment; |
| 106 | id->bus = data->id.bus; |
| 107 | id->device = data->id.device; |
| 108 | id->function = data->id.function; |
| 109 | */ |
| 110 | |
| 111 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 112 | "Device %s has PCI address %02x:%02x:%02x.%02x\n", |
| 113 | acpi_device_bid(device), id->segment, id->bus, |
| 114 | id->device, id->function)); |
| 115 | |
| 116 | return_ACPI_STATUS(AE_OK); |
| 117 | } |
| 118 | #endif /* ACPI_FUTURE_USAGE */ |
| 119 | |
| 120 | |
| 121 | int |
| 122 | acpi_pci_bind ( |
| 123 | struct acpi_device *device) |
| 124 | { |
| 125 | int result = 0; |
| 126 | acpi_status status = AE_OK; |
| 127 | struct acpi_pci_data *data = NULL; |
| 128 | struct acpi_pci_data *pdata = NULL; |
| 129 | char *pathname = NULL; |
| 130 | struct acpi_buffer buffer = {0, NULL}; |
| 131 | acpi_handle handle = NULL; |
Rajesh Shah | c431ada | 2005-04-28 00:25:45 -0700 | [diff] [blame] | 132 | struct pci_dev *dev; |
| 133 | struct pci_bus *bus; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | |
| 135 | ACPI_FUNCTION_TRACE("acpi_pci_bind"); |
| 136 | |
| 137 | if (!device || !device->parent) |
| 138 | return_VALUE(-EINVAL); |
| 139 | |
| 140 | pathname = kmalloc(ACPI_PATHNAME_MAX, GFP_KERNEL); |
| 141 | if(!pathname) |
| 142 | return_VALUE(-ENOMEM); |
| 143 | memset(pathname, 0, ACPI_PATHNAME_MAX); |
| 144 | buffer.length = ACPI_PATHNAME_MAX; |
| 145 | buffer.pointer = pathname; |
| 146 | |
| 147 | data = kmalloc(sizeof(struct acpi_pci_data), GFP_KERNEL); |
| 148 | if (!data){ |
| 149 | kfree (pathname); |
| 150 | return_VALUE(-ENOMEM); |
| 151 | } |
| 152 | memset(data, 0, sizeof(struct acpi_pci_data)); |
| 153 | |
| 154 | acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer); |
| 155 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Binding PCI device [%s]...\n", |
| 156 | pathname)); |
| 157 | |
| 158 | /* |
| 159 | * Segment & Bus |
| 160 | * ------------- |
| 161 | * These are obtained via the parent device's ACPI-PCI context. |
| 162 | */ |
| 163 | status = acpi_get_data(device->parent->handle, acpi_pci_data_handler, |
| 164 | (void**) &pdata); |
| 165 | if (ACPI_FAILURE(status) || !pdata || !pdata->bus) { |
| 166 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| 167 | "Invalid ACPI-PCI context for parent device %s\n", |
| 168 | acpi_device_bid(device->parent))); |
| 169 | result = -ENODEV; |
| 170 | goto end; |
| 171 | } |
| 172 | data->id.segment = pdata->id.segment; |
| 173 | data->id.bus = pdata->bus->number; |
| 174 | |
| 175 | /* |
| 176 | * Device & Function |
| 177 | * ----------------- |
| 178 | * These are simply obtained from the device's _ADR method. Note |
| 179 | * that a value of zero is valid. |
| 180 | */ |
| 181 | data->id.device = device->pnp.bus_address >> 16; |
| 182 | data->id.function = device->pnp.bus_address & 0xFFFF; |
| 183 | |
| 184 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "...to %02x:%02x:%02x.%02x\n", |
| 185 | data->id.segment, data->id.bus, data->id.device, |
| 186 | data->id.function)); |
| 187 | |
| 188 | /* |
| 189 | * TBD: Support slot devices (e.g. function=0xFFFF). |
| 190 | */ |
| 191 | |
| 192 | /* |
| 193 | * Locate PCI Device |
| 194 | * ----------------- |
| 195 | * Locate matching device in PCI namespace. If it doesn't exist |
| 196 | * this typically means that the device isn't currently inserted |
| 197 | * (e.g. docking station, port replicator, etc.). |
Rajesh Shah | c431ada | 2005-04-28 00:25:45 -0700 | [diff] [blame] | 198 | * We cannot simply search the global pci device list, since |
| 199 | * PCI devices are added to the global pci list when the root |
| 200 | * bridge start ops are run, which may not have happened yet. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | */ |
Rajesh Shah | c431ada | 2005-04-28 00:25:45 -0700 | [diff] [blame] | 202 | bus = pci_find_bus(data->id.segment, data->id.bus); |
| 203 | if (bus) { |
| 204 | list_for_each_entry(dev, &bus->devices, bus_list) { |
| 205 | if (dev->devfn == PCI_DEVFN(data->id.device, |
| 206 | data->id.function)) { |
| 207 | data->dev = dev; |
| 208 | break; |
| 209 | } |
| 210 | } |
| 211 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | if (!data->dev) { |
| 213 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 214 | "Device %02x:%02x:%02x.%02x not present in PCI namespace\n", |
| 215 | data->id.segment, data->id.bus, |
| 216 | data->id.device, data->id.function)); |
| 217 | result = -ENODEV; |
| 218 | goto end; |
| 219 | } |
| 220 | if (!data->dev->bus) { |
| 221 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| 222 | "Device %02x:%02x:%02x.%02x has invalid 'bus' field\n", |
| 223 | data->id.segment, data->id.bus, |
| 224 | data->id.device, data->id.function)); |
| 225 | result = -ENODEV; |
| 226 | goto end; |
| 227 | } |
| 228 | |
| 229 | /* |
| 230 | * PCI Bridge? |
| 231 | * ----------- |
| 232 | * If so, set the 'bus' field and install the 'bind' function to |
| 233 | * facilitate callbacks for all of its children. |
| 234 | */ |
| 235 | if (data->dev->subordinate) { |
| 236 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, |
| 237 | "Device %02x:%02x:%02x.%02x is a PCI bridge\n", |
| 238 | data->id.segment, data->id.bus, |
| 239 | data->id.device, data->id.function)); |
| 240 | data->bus = data->dev->subordinate; |
| 241 | device->ops.bind = acpi_pci_bind; |
| 242 | device->ops.unbind = acpi_pci_unbind; |
| 243 | } |
| 244 | |
| 245 | /* |
| 246 | * Attach ACPI-PCI Context |
| 247 | * ----------------------- |
| 248 | * Thus binding the ACPI and PCI devices. |
| 249 | */ |
| 250 | status = acpi_attach_data(device->handle, acpi_pci_data_handler, data); |
| 251 | if (ACPI_FAILURE(status)) { |
| 252 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| 253 | "Unable to attach ACPI-PCI context to device %s\n", |
| 254 | acpi_device_bid(device))); |
| 255 | result = -ENODEV; |
| 256 | goto end; |
| 257 | } |
| 258 | |
| 259 | /* |
| 260 | * PCI Routing Table |
| 261 | * ----------------- |
| 262 | * Evaluate and parse _PRT, if exists. This code is independent of |
| 263 | * PCI bridges (above) to allow parsing of _PRT objects within the |
| 264 | * scope of non-bridge devices. Note that _PRTs within the scope of |
| 265 | * a PCI bridge assume the bridge's subordinate bus number. |
| 266 | * |
| 267 | * TBD: Can _PRTs exist within the scope of non-bridge PCI devices? |
| 268 | */ |
| 269 | status = acpi_get_handle(device->handle, METHOD_NAME__PRT, &handle); |
| 270 | if (ACPI_SUCCESS(status)) { |
| 271 | if (data->bus) /* PCI-PCI bridge */ |
| 272 | acpi_pci_irq_add_prt(device->handle, data->id.segment, |
| 273 | data->bus->number); |
| 274 | else /* non-bridge PCI device */ |
| 275 | acpi_pci_irq_add_prt(device->handle, data->id.segment, |
| 276 | data->id.bus); |
| 277 | } |
| 278 | |
| 279 | end: |
| 280 | kfree(pathname); |
| 281 | if (result) |
| 282 | kfree(data); |
| 283 | |
| 284 | return_VALUE(result); |
| 285 | } |
| 286 | |
| 287 | int acpi_pci_unbind( |
| 288 | struct acpi_device *device) |
| 289 | { |
| 290 | int result = 0; |
| 291 | acpi_status status = AE_OK; |
| 292 | struct acpi_pci_data *data = NULL; |
| 293 | char *pathname = NULL; |
| 294 | struct acpi_buffer buffer = {0, NULL}; |
| 295 | |
| 296 | ACPI_FUNCTION_TRACE("acpi_pci_unbind"); |
| 297 | |
| 298 | if (!device || !device->parent) |
| 299 | return_VALUE(-EINVAL); |
| 300 | |
| 301 | pathname = (char *) kmalloc(ACPI_PATHNAME_MAX, GFP_KERNEL); |
| 302 | if(!pathname) |
| 303 | return_VALUE(-ENOMEM); |
| 304 | memset(pathname, 0, ACPI_PATHNAME_MAX); |
| 305 | |
| 306 | buffer.length = ACPI_PATHNAME_MAX; |
| 307 | buffer.pointer = pathname; |
| 308 | acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer); |
| 309 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Unbinding PCI device [%s]...\n", |
| 310 | pathname)); |
| 311 | kfree(pathname); |
| 312 | |
| 313 | status = acpi_get_data(device->handle, acpi_pci_data_handler, (void**)&data); |
| 314 | if (ACPI_FAILURE(status)) { |
| 315 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| 316 | "Unable to get data from device %s\n", |
| 317 | acpi_device_bid(device))); |
| 318 | result = -ENODEV; |
| 319 | goto end; |
| 320 | } |
| 321 | |
| 322 | status = acpi_detach_data(device->handle, acpi_pci_data_handler); |
| 323 | if (ACPI_FAILURE(status)) { |
| 324 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| 325 | "Unable to detach data from device %s\n", |
| 326 | acpi_device_bid(device))); |
| 327 | result = -ENODEV; |
| 328 | goto end; |
| 329 | } |
| 330 | if (data->dev->subordinate) { |
| 331 | acpi_pci_irq_del_prt(data->id.segment, data->bus->number); |
| 332 | } |
| 333 | kfree(data); |
| 334 | |
| 335 | end: |
| 336 | return_VALUE(result); |
| 337 | } |
| 338 | |
| 339 | int |
| 340 | acpi_pci_bind_root ( |
| 341 | struct acpi_device *device, |
| 342 | struct acpi_pci_id *id, |
| 343 | struct pci_bus *bus) |
| 344 | { |
| 345 | int result = 0; |
| 346 | acpi_status status = AE_OK; |
| 347 | struct acpi_pci_data *data = NULL; |
| 348 | char *pathname = NULL; |
| 349 | struct acpi_buffer buffer = {0, NULL}; |
| 350 | |
| 351 | ACPI_FUNCTION_TRACE("acpi_pci_bind_root"); |
| 352 | |
| 353 | pathname = (char *)kmalloc(ACPI_PATHNAME_MAX, GFP_KERNEL); |
| 354 | if(!pathname) |
| 355 | return_VALUE(-ENOMEM); |
| 356 | memset(pathname, 0, ACPI_PATHNAME_MAX); |
| 357 | |
| 358 | buffer.length = ACPI_PATHNAME_MAX; |
| 359 | buffer.pointer = pathname; |
| 360 | |
| 361 | if (!device || !id || !bus){ |
| 362 | kfree(pathname); |
| 363 | return_VALUE(-EINVAL); |
| 364 | } |
| 365 | |
| 366 | data = kmalloc(sizeof(struct acpi_pci_data), GFP_KERNEL); |
| 367 | if (!data){ |
| 368 | kfree(pathname); |
| 369 | return_VALUE(-ENOMEM); |
| 370 | } |
| 371 | memset(data, 0, sizeof(struct acpi_pci_data)); |
| 372 | |
| 373 | data->id = *id; |
| 374 | data->bus = bus; |
| 375 | device->ops.bind = acpi_pci_bind; |
| 376 | device->ops.unbind = acpi_pci_unbind; |
| 377 | |
| 378 | acpi_get_name(device->handle, ACPI_FULL_PATHNAME, &buffer); |
| 379 | |
| 380 | ACPI_DEBUG_PRINT((ACPI_DB_INFO, "Binding PCI root bridge [%s] to " |
| 381 | "%02x:%02x\n", pathname, id->segment, id->bus)); |
| 382 | |
| 383 | status = acpi_attach_data(device->handle, acpi_pci_data_handler, data); |
| 384 | if (ACPI_FAILURE(status)) { |
| 385 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| 386 | "Unable to attach ACPI-PCI context to device %s\n", |
| 387 | pathname)); |
| 388 | result = -ENODEV; |
| 389 | goto end; |
| 390 | } |
| 391 | |
| 392 | end: |
| 393 | kfree(pathname); |
| 394 | if (result != 0) |
| 395 | kfree(data); |
| 396 | |
| 397 | return_VALUE(result); |
| 398 | } |