Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /******************************************************************************* |
| 2 | * |
| 3 | * Module Name: rsxface - Public interfaces to the resource manager |
| 4 | * |
| 5 | ******************************************************************************/ |
| 6 | |
| 7 | /* |
| 8 | * Copyright (C) 2000 - 2005, R. Byron Moore |
| 9 | * All rights reserved. |
| 10 | * |
| 11 | * Redistribution and use in source and binary forms, with or without |
| 12 | * modification, are permitted provided that the following conditions |
| 13 | * are met: |
| 14 | * 1. Redistributions of source code must retain the above copyright |
| 15 | * notice, this list of conditions, and the following disclaimer, |
| 16 | * without modification. |
| 17 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer |
| 18 | * substantially similar to the "NO WARRANTY" disclaimer below |
| 19 | * ("Disclaimer") and any redistribution must be conditioned upon |
| 20 | * including a substantially similar Disclaimer requirement for further |
| 21 | * binary redistribution. |
| 22 | * 3. Neither the names of the above-listed copyright holders nor the names |
| 23 | * of any contributors may be used to endorse or promote products derived |
| 24 | * from this software without specific prior written permission. |
| 25 | * |
| 26 | * Alternatively, this software may be distributed under the terms of the |
| 27 | * GNU General Public License ("GPL") version 2 as published by the Free |
| 28 | * Software Foundation. |
| 29 | * |
| 30 | * NO WARRANTY |
| 31 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 32 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 33 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR |
| 34 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 35 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 36 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 37 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 38 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 39 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| 40 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 41 | * POSSIBILITY OF SUCH DAMAGES. |
| 42 | */ |
| 43 | |
| 44 | #include <linux/module.h> |
| 45 | |
| 46 | #include <acpi/acpi.h> |
| 47 | #include <acpi/acresrc.h> |
| 48 | |
| 49 | #define _COMPONENT ACPI_RESOURCES |
| 50 | ACPI_MODULE_NAME ("rsxface") |
| 51 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame^] | 52 | /* Local macros for 16,32-bit to 64-bit conversion */ |
| 53 | |
| 54 | #define ACPI_COPY_FIELD(out, in, field) ((out)->field = (in)->field) |
| 55 | #define ACPI_COPY_ADDRESS(out, in) \ |
| 56 | ACPI_COPY_FIELD(out, in, resource_type); \ |
| 57 | ACPI_COPY_FIELD(out, in, producer_consumer); \ |
| 58 | ACPI_COPY_FIELD(out, in, decode); \ |
| 59 | ACPI_COPY_FIELD(out, in, min_address_fixed); \ |
| 60 | ACPI_COPY_FIELD(out, in, max_address_fixed); \ |
| 61 | ACPI_COPY_FIELD(out, in, attribute); \ |
| 62 | ACPI_COPY_FIELD(out, in, granularity); \ |
| 63 | ACPI_COPY_FIELD(out, in, min_address_range); \ |
| 64 | ACPI_COPY_FIELD(out, in, max_address_range); \ |
| 65 | ACPI_COPY_FIELD(out, in, address_translation_offset); \ |
| 66 | ACPI_COPY_FIELD(out, in, address_length); \ |
| 67 | ACPI_COPY_FIELD(out, in, resource_source); |
| 68 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | |
| 70 | /******************************************************************************* |
| 71 | * |
| 72 | * FUNCTION: acpi_get_irq_routing_table |
| 73 | * |
| 74 | * PARAMETERS: device_handle - a handle to the Bus device we are querying |
| 75 | * ret_buffer - a pointer to a buffer to receive the |
| 76 | * current resources for the device |
| 77 | * |
| 78 | * RETURN: Status |
| 79 | * |
| 80 | * DESCRIPTION: This function is called to get the IRQ routing table for a |
| 81 | * specific bus. The caller must first acquire a handle for the |
| 82 | * desired bus. The routine table is placed in the buffer pointed |
| 83 | * to by the ret_buffer variable parameter. |
| 84 | * |
| 85 | * If the function fails an appropriate status will be returned |
| 86 | * and the value of ret_buffer is undefined. |
| 87 | * |
| 88 | * This function attempts to execute the _PRT method contained in |
| 89 | * the object indicated by the passed device_handle. |
| 90 | * |
| 91 | ******************************************************************************/ |
| 92 | |
| 93 | acpi_status |
| 94 | acpi_get_irq_routing_table ( |
| 95 | acpi_handle device_handle, |
| 96 | struct acpi_buffer *ret_buffer) |
| 97 | { |
| 98 | acpi_status status; |
| 99 | |
| 100 | |
| 101 | ACPI_FUNCTION_TRACE ("acpi_get_irq_routing_table "); |
| 102 | |
| 103 | |
| 104 | /* |
| 105 | * Must have a valid handle and buffer, So we have to have a handle |
| 106 | * and a return buffer structure, and if there is a non-zero buffer length |
| 107 | * we also need a valid pointer in the buffer. If it's a zero buffer length, |
| 108 | * we'll be returning the needed buffer size, so keep going. |
| 109 | */ |
| 110 | if (!device_handle) { |
| 111 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
| 112 | } |
| 113 | |
| 114 | status = acpi_ut_validate_buffer (ret_buffer); |
| 115 | if (ACPI_FAILURE (status)) { |
| 116 | return_ACPI_STATUS (status); |
| 117 | } |
| 118 | |
| 119 | status = acpi_rs_get_prt_method_data (device_handle, ret_buffer); |
| 120 | return_ACPI_STATUS (status); |
| 121 | } |
| 122 | |
| 123 | |
| 124 | /******************************************************************************* |
| 125 | * |
| 126 | * FUNCTION: acpi_get_current_resources |
| 127 | * |
| 128 | * PARAMETERS: device_handle - a handle to the device object for the |
| 129 | * device we are querying |
| 130 | * ret_buffer - a pointer to a buffer to receive the |
| 131 | * current resources for the device |
| 132 | * |
| 133 | * RETURN: Status |
| 134 | * |
| 135 | * DESCRIPTION: This function is called to get the current resources for a |
| 136 | * specific device. The caller must first acquire a handle for |
| 137 | * the desired device. The resource data is placed in the buffer |
| 138 | * pointed to by the ret_buffer variable parameter. |
| 139 | * |
| 140 | * If the function fails an appropriate status will be returned |
| 141 | * and the value of ret_buffer is undefined. |
| 142 | * |
| 143 | * This function attempts to execute the _CRS method contained in |
| 144 | * the object indicated by the passed device_handle. |
| 145 | * |
| 146 | ******************************************************************************/ |
| 147 | |
| 148 | acpi_status |
| 149 | acpi_get_current_resources ( |
| 150 | acpi_handle device_handle, |
| 151 | struct acpi_buffer *ret_buffer) |
| 152 | { |
| 153 | acpi_status status; |
| 154 | |
| 155 | |
| 156 | ACPI_FUNCTION_TRACE ("acpi_get_current_resources"); |
| 157 | |
| 158 | |
| 159 | /* |
| 160 | * Must have a valid handle and buffer, So we have to have a handle |
| 161 | * and a return buffer structure, and if there is a non-zero buffer length |
| 162 | * we also need a valid pointer in the buffer. If it's a zero buffer length, |
| 163 | * we'll be returning the needed buffer size, so keep going. |
| 164 | */ |
| 165 | if (!device_handle) { |
| 166 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
| 167 | } |
| 168 | |
| 169 | status = acpi_ut_validate_buffer (ret_buffer); |
| 170 | if (ACPI_FAILURE (status)) { |
| 171 | return_ACPI_STATUS (status); |
| 172 | } |
| 173 | |
| 174 | status = acpi_rs_get_crs_method_data (device_handle, ret_buffer); |
| 175 | return_ACPI_STATUS (status); |
| 176 | } |
| 177 | EXPORT_SYMBOL(acpi_get_current_resources); |
| 178 | |
| 179 | |
| 180 | /******************************************************************************* |
| 181 | * |
| 182 | * FUNCTION: acpi_get_possible_resources |
| 183 | * |
| 184 | * PARAMETERS: device_handle - a handle to the device object for the |
| 185 | * device we are querying |
| 186 | * ret_buffer - a pointer to a buffer to receive the |
| 187 | * resources for the device |
| 188 | * |
| 189 | * RETURN: Status |
| 190 | * |
| 191 | * DESCRIPTION: This function is called to get a list of the possible resources |
| 192 | * for a specific device. The caller must first acquire a handle |
| 193 | * for the desired device. The resource data is placed in the |
| 194 | * buffer pointed to by the ret_buffer variable. |
| 195 | * |
| 196 | * If the function fails an appropriate status will be returned |
| 197 | * and the value of ret_buffer is undefined. |
| 198 | * |
| 199 | ******************************************************************************/ |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame^] | 200 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | #ifdef ACPI_FUTURE_USAGE |
| 202 | acpi_status |
| 203 | acpi_get_possible_resources ( |
| 204 | acpi_handle device_handle, |
| 205 | struct acpi_buffer *ret_buffer) |
| 206 | { |
| 207 | acpi_status status; |
| 208 | |
| 209 | |
| 210 | ACPI_FUNCTION_TRACE ("acpi_get_possible_resources"); |
| 211 | |
| 212 | |
| 213 | /* |
| 214 | * Must have a valid handle and buffer, So we have to have a handle |
| 215 | * and a return buffer structure, and if there is a non-zero buffer length |
| 216 | * we also need a valid pointer in the buffer. If it's a zero buffer length, |
| 217 | * we'll be returning the needed buffer size, so keep going. |
| 218 | */ |
| 219 | if (!device_handle) { |
| 220 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
| 221 | } |
| 222 | |
| 223 | status = acpi_ut_validate_buffer (ret_buffer); |
| 224 | if (ACPI_FAILURE (status)) { |
| 225 | return_ACPI_STATUS (status); |
| 226 | } |
| 227 | |
| 228 | status = acpi_rs_get_prs_method_data (device_handle, ret_buffer); |
| 229 | return_ACPI_STATUS (status); |
| 230 | } |
| 231 | EXPORT_SYMBOL(acpi_get_possible_resources); |
| 232 | #endif /* ACPI_FUTURE_USAGE */ |
| 233 | |
| 234 | |
| 235 | /******************************************************************************* |
| 236 | * |
| 237 | * FUNCTION: acpi_walk_resources |
| 238 | * |
| 239 | * PARAMETERS: device_handle - a handle to the device object for the |
| 240 | * device we are querying |
| 241 | * Path - method name of the resources we want |
| 242 | * (METHOD_NAME__CRS or METHOD_NAME__PRS) |
| 243 | * user_function - called for each resource |
| 244 | * Context - passed to user_function |
| 245 | * |
| 246 | * RETURN: Status |
| 247 | * |
| 248 | * DESCRIPTION: Retrieves the current or possible resource list for the |
| 249 | * specified device. The user_function is called once for |
| 250 | * each resource in the list. |
| 251 | * |
| 252 | ******************************************************************************/ |
| 253 | |
| 254 | acpi_status |
| 255 | acpi_walk_resources ( |
| 256 | acpi_handle device_handle, |
| 257 | char *path, |
| 258 | ACPI_WALK_RESOURCE_CALLBACK user_function, |
| 259 | void *context) |
| 260 | { |
| 261 | acpi_status status; |
| 262 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; |
| 263 | struct acpi_resource *resource; |
| 264 | struct acpi_resource *buffer_end; |
| 265 | |
| 266 | |
| 267 | ACPI_FUNCTION_TRACE ("acpi_walk_resources"); |
| 268 | |
| 269 | |
| 270 | if (!device_handle || |
| 271 | (ACPI_STRNCMP (path, METHOD_NAME__CRS, sizeof (METHOD_NAME__CRS)) && |
| 272 | ACPI_STRNCMP (path, METHOD_NAME__PRS, sizeof (METHOD_NAME__PRS)))) { |
| 273 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
| 274 | } |
| 275 | |
| 276 | status = acpi_rs_get_method_data (device_handle, path, &buffer); |
| 277 | if (ACPI_FAILURE (status)) { |
| 278 | return_ACPI_STATUS (status); |
| 279 | } |
| 280 | |
| 281 | /* Setup pointers */ |
| 282 | |
| 283 | resource = (struct acpi_resource *) buffer.pointer; |
| 284 | buffer_end = ACPI_CAST_PTR (struct acpi_resource, |
| 285 | ((u8 *) buffer.pointer + buffer.length)); |
| 286 | |
| 287 | /* Walk the resource list */ |
| 288 | |
| 289 | for (;;) { |
| 290 | if (!resource || resource->id == ACPI_RSTYPE_END_TAG) { |
| 291 | break; |
| 292 | } |
| 293 | |
| 294 | status = user_function (resource, context); |
| 295 | |
| 296 | switch (status) { |
| 297 | case AE_OK: |
| 298 | case AE_CTRL_DEPTH: |
| 299 | |
| 300 | /* Just keep going */ |
| 301 | |
| 302 | status = AE_OK; |
| 303 | break; |
| 304 | |
| 305 | case AE_CTRL_TERMINATE: |
| 306 | |
| 307 | /* Exit now, with OK stats */ |
| 308 | |
| 309 | status = AE_OK; |
| 310 | goto cleanup; |
| 311 | |
| 312 | default: |
| 313 | |
| 314 | /* All others are valid exceptions */ |
| 315 | |
| 316 | goto cleanup; |
| 317 | } |
| 318 | |
| 319 | /* Get the next resource descriptor */ |
| 320 | |
| 321 | resource = ACPI_NEXT_RESOURCE (resource); |
| 322 | |
| 323 | /* Check for end-of-buffer */ |
| 324 | |
| 325 | if (resource >= buffer_end) { |
| 326 | goto cleanup; |
| 327 | } |
| 328 | } |
| 329 | |
| 330 | cleanup: |
| 331 | |
| 332 | acpi_os_free (buffer.pointer); |
| 333 | return_ACPI_STATUS (status); |
| 334 | } |
| 335 | EXPORT_SYMBOL(acpi_walk_resources); |
| 336 | |
| 337 | |
| 338 | /******************************************************************************* |
| 339 | * |
| 340 | * FUNCTION: acpi_set_current_resources |
| 341 | * |
| 342 | * PARAMETERS: device_handle - a handle to the device object for the |
| 343 | * device we are changing the resources of |
| 344 | * in_buffer - a pointer to a buffer containing the |
| 345 | * resources to be set for the device |
| 346 | * |
| 347 | * RETURN: Status |
| 348 | * |
| 349 | * DESCRIPTION: This function is called to set the current resources for a |
| 350 | * specific device. The caller must first acquire a handle for |
| 351 | * the desired device. The resource data is passed to the routine |
| 352 | * the buffer pointed to by the in_buffer variable. |
| 353 | * |
| 354 | ******************************************************************************/ |
| 355 | |
| 356 | acpi_status |
| 357 | acpi_set_current_resources ( |
| 358 | acpi_handle device_handle, |
| 359 | struct acpi_buffer *in_buffer) |
| 360 | { |
| 361 | acpi_status status; |
| 362 | |
| 363 | |
| 364 | ACPI_FUNCTION_TRACE ("acpi_set_current_resources"); |
| 365 | |
| 366 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame^] | 367 | /* Must have a valid handle and buffer */ |
| 368 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | if ((!device_handle) || |
| 370 | (!in_buffer) || |
| 371 | (!in_buffer->pointer) || |
| 372 | (!in_buffer->length)) { |
| 373 | return_ACPI_STATUS (AE_BAD_PARAMETER); |
| 374 | } |
| 375 | |
| 376 | status = acpi_rs_set_srs_method_data (device_handle, in_buffer); |
| 377 | return_ACPI_STATUS (status); |
| 378 | } |
| 379 | EXPORT_SYMBOL(acpi_set_current_resources); |
| 380 | |
| 381 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | /****************************************************************************** |
| 383 | * |
| 384 | * FUNCTION: acpi_resource_to_address64 |
| 385 | * |
| 386 | * PARAMETERS: resource - Pointer to a resource |
| 387 | * out - Pointer to the users's return |
| 388 | * buffer (a struct |
| 389 | * struct acpi_resource_address64) |
| 390 | * |
| 391 | * RETURN: Status |
| 392 | * |
| 393 | * DESCRIPTION: If the resource is an address16, address32, or address64, |
| 394 | * copy it to the address64 return buffer. This saves the |
| 395 | * caller from having to duplicate code for different-sized |
| 396 | * addresses. |
| 397 | * |
| 398 | ******************************************************************************/ |
| 399 | |
| 400 | acpi_status |
| 401 | acpi_resource_to_address64 ( |
| 402 | struct acpi_resource *resource, |
| 403 | struct acpi_resource_address64 *out) |
| 404 | { |
| 405 | struct acpi_resource_address16 *address16; |
| 406 | struct acpi_resource_address32 *address32; |
| 407 | |
| 408 | |
| 409 | switch (resource->id) { |
| 410 | case ACPI_RSTYPE_ADDRESS16: |
| 411 | |
| 412 | address16 = (struct acpi_resource_address16 *) &resource->data; |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame^] | 413 | ACPI_COPY_ADDRESS (out, address16); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | break; |
| 415 | |
| 416 | |
| 417 | case ACPI_RSTYPE_ADDRESS32: |
| 418 | |
| 419 | address32 = (struct acpi_resource_address32 *) &resource->data; |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame^] | 420 | ACPI_COPY_ADDRESS (out, address32); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 421 | break; |
| 422 | |
| 423 | |
| 424 | case ACPI_RSTYPE_ADDRESS64: |
| 425 | |
| 426 | /* Simple copy for 64 bit source */ |
| 427 | |
| 428 | ACPI_MEMCPY (out, &resource->data, sizeof (struct acpi_resource_address64)); |
| 429 | break; |
| 430 | |
| 431 | |
| 432 | default: |
| 433 | return (AE_BAD_PARAMETER); |
| 434 | } |
| 435 | |
| 436 | return (AE_OK); |
| 437 | } |
| 438 | EXPORT_SYMBOL(acpi_resource_to_address64); |