summaryrefslogtreecommitdiffstats
path: root/drivers/acpi/resources/rsxface.c
blob: 1a87c4c7bd97d370de64472a8fcf8b55ccf30b8f (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
/*******************************************************************************
 *
 * Module Name: rsxface - Public interfaces to the resource manager
 *
 ******************************************************************************/

/*
 * Copyright (C) 2000 - 2005, R. Byron Moore
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions, and the following disclaimer,
 *    without modification.
 * 2. Redistributions in binary form must reproduce at minimum a disclaimer
 *    substantially similar to the "NO WARRANTY" disclaimer below
 *    ("Disclaimer") and any redistribution must be conditioned upon
 *    including a substantially similar Disclaimer requirement for further
 *    binary redistribution.
 * 3. Neither the names of the above-listed copyright holders nor the names
 *    of any contributors may be used to endorse or promote products derived
 *    from this software without specific prior written permission.
 *
 * Alternatively, this software may be distributed under the terms of the
 * GNU General Public License ("GPL") version 2 as published by the Free
 * Software Foundation.
 *
 * NO WARRANTY
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
 * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
 * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGES.
 */

#include <linux/module.h>

#include <acpi/acpi.h>
#include <acpi/acresrc.h>

#define _COMPONENT          ACPI_RESOURCES
ACPI_MODULE_NAME("rsxface")

/* Local macros for 16,32-bit to 64-bit conversion */
#define ACPI_COPY_FIELD(out, in, field)  ((out)->field = (in)->field)
#define ACPI_COPY_ADDRESS(out, in)                      \
	ACPI_COPY_FIELD(out, in, resource_type);             \
	ACPI_COPY_FIELD(out, in, producer_consumer);         \
	ACPI_COPY_FIELD(out, in, decode);                    \
	ACPI_COPY_FIELD(out, in, min_address_fixed);         \
	ACPI_COPY_FIELD(out, in, max_address_fixed);         \
	ACPI_COPY_FIELD(out, in, attribute);                 \
	ACPI_COPY_FIELD(out, in, granularity);               \
	ACPI_COPY_FIELD(out, in, min_address_range);         \
	ACPI_COPY_FIELD(out, in, max_address_range);         \
	ACPI_COPY_FIELD(out, in, address_translation_offset); \
	ACPI_COPY_FIELD(out, in, address_length);            \
	ACPI_COPY_FIELD(out, in, resource_source);
/*******************************************************************************
 *
 * FUNCTION:    acpi_get_irq_routing_table
 *
 * PARAMETERS:  device_handle   - a handle to the Bus device we are querying
 *              ret_buffer      - a pointer to a buffer to receive the
 *                                current resources for the device
 *
 * RETURN:      Status
 *
 * DESCRIPTION: This function is called to get the IRQ routing table for a
 *              specific bus.  The caller must first acquire a handle for the
 *              desired bus.  The routine table is placed in the buffer pointed
 *              to by the ret_buffer variable parameter.
 *
 *              If the function fails an appropriate status will be returned
 *              and the value of ret_buffer is undefined.
 *
 *              This function attempts to execute the _PRT method contained in
 *              the object indicated by the passed device_handle.
 *
 ******************************************************************************/
acpi_status
acpi_get_irq_routing_table(acpi_handle device_handle,
			   struct acpi_buffer *ret_buffer)
{
	acpi_status status;

	ACPI_FUNCTION_TRACE("acpi_get_irq_routing_table ");

	/*
	 * Must have a valid handle and buffer, So we have to have a handle
	 * and a return buffer structure, and if there is a non-zero buffer length
	 * we also need a valid pointer in the buffer. If it's a zero buffer length,
	 * we'll be returning the needed buffer size, so keep going.
	 */
	if (!device_handle) {
		return_ACPI_STATUS(AE_BAD_PARAMETER);
	}

	status = acpi_ut_validate_buffer(ret_buffer);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	status = acpi_rs_get_prt_method_data(device_handle, ret_buffer);
	return_ACPI_STATUS(status);
}

/*******************************************************************************
 *
 * FUNCTION:    acpi_get_current_resources
 *
 * PARAMETERS:  device_handle   - a handle to the device object for the
 *                                device we are querying
 *              ret_buffer      - a pointer to a buffer to receive the
 *                                current resources for the device
 *
 * RETURN:      Status
 *
 * DESCRIPTION: This function is called to get the current resources for a
 *              specific device.  The caller must first acquire a handle for
 *              the desired device.  The resource data is placed in the buffer
 *              pointed to by the ret_buffer variable parameter.
 *
 *              If the function fails an appropriate status will be returned
 *              and the value of ret_buffer is undefined.
 *
 *              This function attempts to execute the _CRS method contained in
 *              the object indicated by the passed device_handle.
 *
 ******************************************************************************/

acpi_status
acpi_get_current_resources(acpi_handle device_handle,
			   struct acpi_buffer *ret_buffer)
{
	acpi_status status;

	ACPI_FUNCTION_TRACE("acpi_get_current_resources");

	/*
	 * Must have a valid handle and buffer, So we have to have a handle
	 * and a return buffer structure, and if there is a non-zero buffer length
	 * we also need a valid pointer in the buffer. If it's a zero buffer length,
	 * we'll be returning the needed buffer size, so keep going.
	 */
	if (!device_handle) {
		return_ACPI_STATUS(AE_BAD_PARAMETER);
	}

	status = acpi_ut_validate_buffer(ret_buffer);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	status = acpi_rs_get_crs_method_data(device_handle, ret_buffer);
	return_ACPI_STATUS(status);
}

EXPORT_SYMBOL(acpi_get_current_resources);

/*******************************************************************************
 *
 * FUNCTION:    acpi_get_possible_resources
 *
 * PARAMETERS:  device_handle   - a handle to the device object for the
 *                                device we are querying
 *              ret_buffer      - a pointer to a buffer to receive the
 *                                resources for the device
 *
 * RETURN:      Status
 *
 * DESCRIPTION: This function is called to get a list of the possible resources
 *              for a specific device.  The caller must first acquire a handle
 *              for the desired device.  The resource data is placed in the
 *              buffer pointed to by the ret_buffer variable.
 *
 *              If the function fails an appropriate status will be returned
 *              and the value of ret_buffer is undefined.
 *
 ******************************************************************************/

#ifdef ACPI_FUTURE_USAGE
acpi_status
acpi_get_possible_resources(acpi_handle device_handle,
			    struct acpi_buffer *ret_buffer)
{
	acpi_status status;

	ACPI_FUNCTION_TRACE("acpi_get_possible_resources");

	/*
	 * Must have a valid handle and buffer, So we have to have a handle
	 * and a return buffer structure, and if there is a non-zero buffer length
	 * we also need a valid pointer in the buffer. If it's a zero buffer length,
	 * we'll be returning the needed buffer size, so keep going.
	 */
	if (!device_handle) {
		return_ACPI_STATUS(AE_BAD_PARAMETER);
	}

	status = acpi_ut_validate_buffer(ret_buffer);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	status = acpi_rs_get_prs_method_data(device_handle, ret_buffer);
	return_ACPI_STATUS(status);
}

EXPORT_SYMBOL(acpi_get_possible_resources);
#endif				/*  ACPI_FUTURE_USAGE  */

/*******************************************************************************
 *
 * FUNCTION:    acpi_walk_resources
 *
 * PARAMETERS:  device_handle   - a handle to the device object for the
 *                                device we are querying
 *              Path            - method name of the resources we want
 *                                (METHOD_NAME__CRS or METHOD_NAME__PRS)
 *              user_function   - called for each resource
 *              Context         - passed to user_function
 *
 * RETURN:      Status
 *
 * DESCRIPTION: Retrieves the current or possible resource list for the
 *              specified device.  The user_function is called once for
 *              each resource in the list.
 *
 ******************************************************************************/

acpi_status
acpi_walk_resources(acpi_handle device_handle,
		    char *path,
		    ACPI_WALK_RESOURCE_CALLBACK user_function, void *context)
{
	acpi_status status;
	struct acpi_buffer buffer = { ACPI_ALLOCATE_BUFFER, NULL };
	struct acpi_resource *resource;
	struct acpi_resource *buffer_end;

	ACPI_FUNCTION_TRACE("acpi_walk_resources");

	if (!device_handle ||
	    (ACPI_STRNCMP(path, METHOD_NAME__CRS, sizeof(METHOD_NAME__CRS)) &&
	     ACPI_STRNCMP(path, METHOD_NAME__PRS, sizeof(METHOD_NAME__PRS)))) {
		return_ACPI_STATUS(AE_BAD_PARAMETER);
	}

	status = acpi_rs_get_method_data(device_handle, path, &buffer);
	if (ACPI_FAILURE(status)) {
		return_ACPI_STATUS(status);
	}

	/* Setup pointers */

	resource = (struct acpi_resource *)buffer.pointer;
	buffer_end = ACPI_CAST_PTR(struct acpi_resource,
				   ((u8 *) buffer.pointer + buffer.length));

	/* Walk the resource list */

	for (;;) {
		if (!resource || resource->type == ACPI_RSTYPE_END_TAG) {
			break;
		}

		status = user_function(resource, context);

		switch (status) {
		case AE_OK:
		case AE_CTRL_DEPTH:

			/* Just keep going */

			status = AE_OK;
			break;

		case AE_CTRL_TERMINATE:

			/* Exit now, with OK stats */

			status = AE_OK;
			goto cleanup;

		default:

			/* All others are valid exceptions */

			goto cleanup;
		}

		/* Get the next resource descriptor */

		resource = ACPI_NEXT_RESOURCE(resource);

		/* Check for end-of-buffer */

		if (resource >= buffer_end) {
			goto cleanup;
		}
	}

      cleanup:

	acpi_os_free(buffer.pointer);
	return_ACPI_STATUS(status);
}

EXPORT_SYMBOL(acpi_walk_resources);

/*******************************************************************************
 *
 * FUNCTION:    acpi_set_current_resources
 *
 * PARAMETERS:  device_handle   - a handle to the device object for the
 *                                device we are changing the resources of
 *              in_buffer       - a pointer to a buffer containing the
 *                                resources to be set for the device
 *
 * RETURN:      Status
 *
 * DESCRIPTION: This function is called to set the current resources for a
 *              specific device.  The caller must first acquire a handle for
 *              the desired device.  The resource data is passed to the routine
 *              the buffer pointed to by the in_buffer variable.
 *
 ******************************************************************************/

acpi_status
acpi_set_current_resources(acpi_handle device_handle,
			   struct acpi_buffer *in_buffer)
{
	acpi_status status;

	ACPI_FUNCTION_TRACE("acpi_set_current_resources");

	/* Must have a valid handle and buffer */

	if ((!device_handle) ||
	    (!in_buffer) || (!in_buffer->pointer) || (!in_buffer->length)) {
		return_ACPI_STATUS(AE_BAD_PARAMETER);
	}

	status = acpi_rs_set_srs_method_data(device_handle, in_buffer);
	return_ACPI_STATUS(status);
}

EXPORT_SYMBOL(acpi_set_current_resources);

/******************************************************************************
 *
 * FUNCTION:    acpi_resource_to_address64
 *
 * PARAMETERS:  Resource                - Pointer to a resource
 *              Out                     - Pointer to the users's return
 *                                        buffer (a struct
 *                                        struct acpi_resource_address64)
 *
 * RETURN:      Status
 *
 * DESCRIPTION: If the resource is an address16, address32, or address64,
 *              copy it to the address64 return buffer.  This saves the
 *              caller from having to duplicate code for different-sized
 *              addresses.
 *
 ******************************************************************************/

acpi_status
acpi_resource_to_address64(struct acpi_resource *resource,
			   struct acpi_resource_address64 *out)
{
	struct acpi_resource_address16 *address16;
	struct acpi_resource_address32 *address32;

	switch (resource->type) {
	case ACPI_RSTYPE_ADDRESS16:

		address16 = (struct acpi_resource_address16 *)&resource->data;
		ACPI_COPY_ADDRESS(out, address16);
		break;

	case ACPI_RSTYPE_ADDRESS32:

		address32 = (struct acpi_resource_address32 *)&resource->data;
		ACPI_COPY_ADDRESS(out, address32);
		break;

	case ACPI_RSTYPE_ADDRESS64:

		/* Simple copy for 64 bit source */

		ACPI_MEMCPY(out, &resource->data,
			    sizeof(struct acpi_resource_address64));
		break;

	default:
		return (AE_BAD_PARAMETER);
	}

	return (AE_OK);
}

EXPORT_SYMBOL(acpi_resource_to_address64);