]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
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 | ||
52 | ||
53 | /******************************************************************************* | |
54 | * | |
55 | * FUNCTION: acpi_get_irq_routing_table | |
56 | * | |
57 | * PARAMETERS: device_handle - a handle to the Bus device we are querying | |
58 | * ret_buffer - a pointer to a buffer to receive the | |
59 | * current resources for the device | |
60 | * | |
61 | * RETURN: Status | |
62 | * | |
63 | * DESCRIPTION: This function is called to get the IRQ routing table for a | |
64 | * specific bus. The caller must first acquire a handle for the | |
65 | * desired bus. The routine table is placed in the buffer pointed | |
66 | * to by the ret_buffer variable parameter. | |
67 | * | |
68 | * If the function fails an appropriate status will be returned | |
69 | * and the value of ret_buffer is undefined. | |
70 | * | |
71 | * This function attempts to execute the _PRT method contained in | |
72 | * the object indicated by the passed device_handle. | |
73 | * | |
74 | ******************************************************************************/ | |
75 | ||
76 | acpi_status | |
77 | acpi_get_irq_routing_table ( | |
78 | acpi_handle device_handle, | |
79 | struct acpi_buffer *ret_buffer) | |
80 | { | |
81 | acpi_status status; | |
82 | ||
83 | ||
84 | ACPI_FUNCTION_TRACE ("acpi_get_irq_routing_table "); | |
85 | ||
86 | ||
87 | /* | |
88 | * Must have a valid handle and buffer, So we have to have a handle | |
89 | * and a return buffer structure, and if there is a non-zero buffer length | |
90 | * we also need a valid pointer in the buffer. If it's a zero buffer length, | |
91 | * we'll be returning the needed buffer size, so keep going. | |
92 | */ | |
93 | if (!device_handle) { | |
94 | return_ACPI_STATUS (AE_BAD_PARAMETER); | |
95 | } | |
96 | ||
97 | status = acpi_ut_validate_buffer (ret_buffer); | |
98 | if (ACPI_FAILURE (status)) { | |
99 | return_ACPI_STATUS (status); | |
100 | } | |
101 | ||
102 | status = acpi_rs_get_prt_method_data (device_handle, ret_buffer); | |
103 | return_ACPI_STATUS (status); | |
104 | } | |
105 | ||
106 | ||
107 | /******************************************************************************* | |
108 | * | |
109 | * FUNCTION: acpi_get_current_resources | |
110 | * | |
111 | * PARAMETERS: device_handle - a handle to the device object for the | |
112 | * device we are querying | |
113 | * ret_buffer - a pointer to a buffer to receive the | |
114 | * current resources for the device | |
115 | * | |
116 | * RETURN: Status | |
117 | * | |
118 | * DESCRIPTION: This function is called to get the current resources for a | |
119 | * specific device. The caller must first acquire a handle for | |
120 | * the desired device. The resource data is placed in the buffer | |
121 | * pointed to by the ret_buffer variable parameter. | |
122 | * | |
123 | * If the function fails an appropriate status will be returned | |
124 | * and the value of ret_buffer is undefined. | |
125 | * | |
126 | * This function attempts to execute the _CRS method contained in | |
127 | * the object indicated by the passed device_handle. | |
128 | * | |
129 | ******************************************************************************/ | |
130 | ||
131 | acpi_status | |
132 | acpi_get_current_resources ( | |
133 | acpi_handle device_handle, | |
134 | struct acpi_buffer *ret_buffer) | |
135 | { | |
136 | acpi_status status; | |
137 | ||
138 | ||
139 | ACPI_FUNCTION_TRACE ("acpi_get_current_resources"); | |
140 | ||
141 | ||
142 | /* | |
143 | * Must have a valid handle and buffer, So we have to have a handle | |
144 | * and a return buffer structure, and if there is a non-zero buffer length | |
145 | * we also need a valid pointer in the buffer. If it's a zero buffer length, | |
146 | * we'll be returning the needed buffer size, so keep going. | |
147 | */ | |
148 | if (!device_handle) { | |
149 | return_ACPI_STATUS (AE_BAD_PARAMETER); | |
150 | } | |
151 | ||
152 | status = acpi_ut_validate_buffer (ret_buffer); | |
153 | if (ACPI_FAILURE (status)) { | |
154 | return_ACPI_STATUS (status); | |
155 | } | |
156 | ||
157 | status = acpi_rs_get_crs_method_data (device_handle, ret_buffer); | |
158 | return_ACPI_STATUS (status); | |
159 | } | |
160 | EXPORT_SYMBOL(acpi_get_current_resources); | |
161 | ||
162 | ||
163 | /******************************************************************************* | |
164 | * | |
165 | * FUNCTION: acpi_get_possible_resources | |
166 | * | |
167 | * PARAMETERS: device_handle - a handle to the device object for the | |
168 | * device we are querying | |
169 | * ret_buffer - a pointer to a buffer to receive the | |
170 | * resources for the device | |
171 | * | |
172 | * RETURN: Status | |
173 | * | |
174 | * DESCRIPTION: This function is called to get a list of the possible resources | |
175 | * for a specific device. The caller must first acquire a handle | |
176 | * for the desired device. The resource data is placed in the | |
177 | * buffer pointed to by the ret_buffer variable. | |
178 | * | |
179 | * If the function fails an appropriate status will be returned | |
180 | * and the value of ret_buffer is undefined. | |
181 | * | |
182 | ******************************************************************************/ | |
183 | #ifdef ACPI_FUTURE_USAGE | |
184 | acpi_status | |
185 | acpi_get_possible_resources ( | |
186 | acpi_handle device_handle, | |
187 | struct acpi_buffer *ret_buffer) | |
188 | { | |
189 | acpi_status status; | |
190 | ||
191 | ||
192 | ACPI_FUNCTION_TRACE ("acpi_get_possible_resources"); | |
193 | ||
194 | ||
195 | /* | |
196 | * Must have a valid handle and buffer, So we have to have a handle | |
197 | * and a return buffer structure, and if there is a non-zero buffer length | |
198 | * we also need a valid pointer in the buffer. If it's a zero buffer length, | |
199 | * we'll be returning the needed buffer size, so keep going. | |
200 | */ | |
201 | if (!device_handle) { | |
202 | return_ACPI_STATUS (AE_BAD_PARAMETER); | |
203 | } | |
204 | ||
205 | status = acpi_ut_validate_buffer (ret_buffer); | |
206 | if (ACPI_FAILURE (status)) { | |
207 | return_ACPI_STATUS (status); | |
208 | } | |
209 | ||
210 | status = acpi_rs_get_prs_method_data (device_handle, ret_buffer); | |
211 | return_ACPI_STATUS (status); | |
212 | } | |
213 | EXPORT_SYMBOL(acpi_get_possible_resources); | |
214 | #endif /* ACPI_FUTURE_USAGE */ | |
215 | ||
216 | ||
217 | /******************************************************************************* | |
218 | * | |
219 | * FUNCTION: acpi_walk_resources | |
220 | * | |
221 | * PARAMETERS: device_handle - a handle to the device object for the | |
222 | * device we are querying | |
223 | * Path - method name of the resources we want | |
224 | * (METHOD_NAME__CRS or METHOD_NAME__PRS) | |
225 | * user_function - called for each resource | |
226 | * Context - passed to user_function | |
227 | * | |
228 | * RETURN: Status | |
229 | * | |
230 | * DESCRIPTION: Retrieves the current or possible resource list for the | |
231 | * specified device. The user_function is called once for | |
232 | * each resource in the list. | |
233 | * | |
234 | ******************************************************************************/ | |
235 | ||
236 | acpi_status | |
237 | acpi_walk_resources ( | |
238 | acpi_handle device_handle, | |
239 | char *path, | |
240 | ACPI_WALK_RESOURCE_CALLBACK user_function, | |
241 | void *context) | |
242 | { | |
243 | acpi_status status; | |
244 | struct acpi_buffer buffer = {ACPI_ALLOCATE_BUFFER, NULL}; | |
245 | struct acpi_resource *resource; | |
246 | struct acpi_resource *buffer_end; | |
247 | ||
248 | ||
249 | ACPI_FUNCTION_TRACE ("acpi_walk_resources"); | |
250 | ||
251 | ||
252 | if (!device_handle || | |
253 | (ACPI_STRNCMP (path, METHOD_NAME__CRS, sizeof (METHOD_NAME__CRS)) && | |
254 | ACPI_STRNCMP (path, METHOD_NAME__PRS, sizeof (METHOD_NAME__PRS)))) { | |
255 | return_ACPI_STATUS (AE_BAD_PARAMETER); | |
256 | } | |
257 | ||
258 | status = acpi_rs_get_method_data (device_handle, path, &buffer); | |
259 | if (ACPI_FAILURE (status)) { | |
260 | return_ACPI_STATUS (status); | |
261 | } | |
262 | ||
263 | /* Setup pointers */ | |
264 | ||
265 | resource = (struct acpi_resource *) buffer.pointer; | |
266 | buffer_end = ACPI_CAST_PTR (struct acpi_resource, | |
267 | ((u8 *) buffer.pointer + buffer.length)); | |
268 | ||
269 | /* Walk the resource list */ | |
270 | ||
271 | for (;;) { | |
272 | if (!resource || resource->id == ACPI_RSTYPE_END_TAG) { | |
273 | break; | |
274 | } | |
275 | ||
276 | status = user_function (resource, context); | |
277 | ||
278 | switch (status) { | |
279 | case AE_OK: | |
280 | case AE_CTRL_DEPTH: | |
281 | ||
282 | /* Just keep going */ | |
283 | ||
284 | status = AE_OK; | |
285 | break; | |
286 | ||
287 | case AE_CTRL_TERMINATE: | |
288 | ||
289 | /* Exit now, with OK stats */ | |
290 | ||
291 | status = AE_OK; | |
292 | goto cleanup; | |
293 | ||
294 | default: | |
295 | ||
296 | /* All others are valid exceptions */ | |
297 | ||
298 | goto cleanup; | |
299 | } | |
300 | ||
301 | /* Get the next resource descriptor */ | |
302 | ||
303 | resource = ACPI_NEXT_RESOURCE (resource); | |
304 | ||
305 | /* Check for end-of-buffer */ | |
306 | ||
307 | if (resource >= buffer_end) { | |
308 | goto cleanup; | |
309 | } | |
310 | } | |
311 | ||
312 | cleanup: | |
313 | ||
314 | acpi_os_free (buffer.pointer); | |
315 | return_ACPI_STATUS (status); | |
316 | } | |
317 | EXPORT_SYMBOL(acpi_walk_resources); | |
318 | ||
319 | ||
320 | /******************************************************************************* | |
321 | * | |
322 | * FUNCTION: acpi_set_current_resources | |
323 | * | |
324 | * PARAMETERS: device_handle - a handle to the device object for the | |
325 | * device we are changing the resources of | |
326 | * in_buffer - a pointer to a buffer containing the | |
327 | * resources to be set for the device | |
328 | * | |
329 | * RETURN: Status | |
330 | * | |
331 | * DESCRIPTION: This function is called to set the current resources for a | |
332 | * specific device. The caller must first acquire a handle for | |
333 | * the desired device. The resource data is passed to the routine | |
334 | * the buffer pointed to by the in_buffer variable. | |
335 | * | |
336 | ******************************************************************************/ | |
337 | ||
338 | acpi_status | |
339 | acpi_set_current_resources ( | |
340 | acpi_handle device_handle, | |
341 | struct acpi_buffer *in_buffer) | |
342 | { | |
343 | acpi_status status; | |
344 | ||
345 | ||
346 | ACPI_FUNCTION_TRACE ("acpi_set_current_resources"); | |
347 | ||
348 | ||
349 | /* | |
350 | * Must have a valid handle and buffer | |
351 | */ | |
352 | if ((!device_handle) || | |
353 | (!in_buffer) || | |
354 | (!in_buffer->pointer) || | |
355 | (!in_buffer->length)) { | |
356 | return_ACPI_STATUS (AE_BAD_PARAMETER); | |
357 | } | |
358 | ||
359 | status = acpi_rs_set_srs_method_data (device_handle, in_buffer); | |
360 | return_ACPI_STATUS (status); | |
361 | } | |
362 | EXPORT_SYMBOL(acpi_set_current_resources); | |
363 | ||
364 | ||
365 | #define ACPI_COPY_FIELD(out, in, field) ((out)->field = (in)->field) | |
366 | #define ACPI_COPY_ADDRESS(out, in) \ | |
367 | ACPI_COPY_FIELD(out, in, resource_type); \ | |
368 | ACPI_COPY_FIELD(out, in, producer_consumer); \ | |
369 | ACPI_COPY_FIELD(out, in, decode); \ | |
370 | ACPI_COPY_FIELD(out, in, min_address_fixed); \ | |
371 | ACPI_COPY_FIELD(out, in, max_address_fixed); \ | |
372 | ACPI_COPY_FIELD(out, in, attribute); \ | |
373 | ACPI_COPY_FIELD(out, in, granularity); \ | |
374 | ACPI_COPY_FIELD(out, in, min_address_range); \ | |
375 | ACPI_COPY_FIELD(out, in, max_address_range); \ | |
376 | ACPI_COPY_FIELD(out, in, address_translation_offset); \ | |
377 | ACPI_COPY_FIELD(out, in, address_length); \ | |
378 | ACPI_COPY_FIELD(out, in, resource_source); | |
379 | ||
380 | /****************************************************************************** | |
381 | * | |
382 | * FUNCTION: acpi_resource_to_address64 | |
383 | * | |
384 | * PARAMETERS: resource - Pointer to a resource | |
385 | * out - Pointer to the users's return | |
386 | * buffer (a struct | |
387 | * struct acpi_resource_address64) | |
388 | * | |
389 | * RETURN: Status | |
390 | * | |
391 | * DESCRIPTION: If the resource is an address16, address32, or address64, | |
392 | * copy it to the address64 return buffer. This saves the | |
393 | * caller from having to duplicate code for different-sized | |
394 | * addresses. | |
395 | * | |
396 | ******************************************************************************/ | |
397 | ||
398 | acpi_status | |
399 | acpi_resource_to_address64 ( | |
400 | struct acpi_resource *resource, | |
401 | struct acpi_resource_address64 *out) | |
402 | { | |
403 | struct acpi_resource_address16 *address16; | |
404 | struct acpi_resource_address32 *address32; | |
405 | ||
406 | ||
407 | switch (resource->id) { | |
408 | case ACPI_RSTYPE_ADDRESS16: | |
409 | ||
410 | address16 = (struct acpi_resource_address16 *) &resource->data; | |
411 | ACPI_COPY_ADDRESS(out, address16); | |
412 | break; | |
413 | ||
414 | ||
415 | case ACPI_RSTYPE_ADDRESS32: | |
416 | ||
417 | address32 = (struct acpi_resource_address32 *) &resource->data; | |
418 | ACPI_COPY_ADDRESS(out, address32); | |
419 | break; | |
420 | ||
421 | ||
422 | case ACPI_RSTYPE_ADDRESS64: | |
423 | ||
424 | /* Simple copy for 64 bit source */ | |
425 | ||
426 | ACPI_MEMCPY (out, &resource->data, sizeof (struct acpi_resource_address64)); | |
427 | break; | |
428 | ||
429 | ||
430 | default: | |
431 | return (AE_BAD_PARAMETER); | |
432 | } | |
433 | ||
434 | return (AE_OK); | |
435 | } | |
436 | EXPORT_SYMBOL(acpi_resource_to_address64); | |
437 |