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 | ||
44f6c012 RM |
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 | ||
1da177e4 LT |
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 | ******************************************************************************/ | |
44f6c012 | 200 | |
1da177e4 LT |
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 | ||
44f6c012 RM |
367 | /* Must have a valid handle and buffer */ |
368 | ||
1da177e4 LT |
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 | ||
1da177e4 LT |
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; | |
44f6c012 | 413 | ACPI_COPY_ADDRESS (out, address16); |
1da177e4 LT |
414 | break; |
415 | ||
416 | ||
417 | case ACPI_RSTYPE_ADDRESS32: | |
418 | ||
419 | address32 = (struct acpi_resource_address32 *) &resource->data; | |
44f6c012 | 420 | ACPI_COPY_ADDRESS (out, address32); |
1da177e4 LT |
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); |