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/drivers/acpi/resources/rsutils.c

https://bitbucket.org/evzijst/gittest
C | 356 lines | 108 code | 62 blank | 186 comment | 8 complexity | 13d2388b3b19f8ecb0c911f6f2eb807b MD5 | raw file
  1/*******************************************************************************
  2 *
  3 * Module Name: rsutils - Utilities for 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
 45#include <acpi/acpi.h>
 46#include <acpi/acnamesp.h>
 47#include <acpi/acresrc.h>
 48
 49
 50#define _COMPONENT          ACPI_RESOURCES
 51	 ACPI_MODULE_NAME    ("rsutils")
 52
 53
 54/*******************************************************************************
 55 *
 56 * FUNCTION:    acpi_rs_get_prt_method_data
 57 *
 58 * PARAMETERS:  Handle          - a handle to the containing object
 59 *              ret_buffer      - a pointer to a buffer structure for the
 60 *                                  results
 61 *
 62 * RETURN:      Status
 63 *
 64 * DESCRIPTION: This function is called to get the _PRT value of an object
 65 *              contained in an object specified by the handle passed in
 66 *
 67 *              If the function fails an appropriate status will be returned
 68 *              and the contents of the callers buffer is undefined.
 69 *
 70 ******************************************************************************/
 71
 72acpi_status
 73acpi_rs_get_prt_method_data (
 74	acpi_handle                     handle,
 75	struct acpi_buffer              *ret_buffer)
 76{
 77	union acpi_operand_object       *obj_desc;
 78	acpi_status                     status;
 79
 80
 81	ACPI_FUNCTION_TRACE ("rs_get_prt_method_data");
 82
 83
 84	/* Parameters guaranteed valid by caller */
 85
 86	/*
 87	 * Execute the method, no parameters
 88	 */
 89	status = acpi_ut_evaluate_object (handle, "_PRT", ACPI_BTYPE_PACKAGE, &obj_desc);
 90	if (ACPI_FAILURE (status)) {
 91		return_ACPI_STATUS (status);
 92	}
 93
 94	/*
 95	 * Create a resource linked list from the byte stream buffer that comes
 96	 * back from the _CRS method execution.
 97	 */
 98	status = acpi_rs_create_pci_routing_table (obj_desc, ret_buffer);
 99
100	/* On exit, we must delete the object returned by evaluate_object */
101
102	acpi_ut_remove_reference (obj_desc);
103	return_ACPI_STATUS (status);
104}
105
106
107/*******************************************************************************
108 *
109 * FUNCTION:    acpi_rs_get_crs_method_data
110 *
111 * PARAMETERS:  Handle          - a handle to the containing object
112 *              ret_buffer      - a pointer to a buffer structure for the
113 *                                  results
114 *
115 * RETURN:      Status
116 *
117 * DESCRIPTION: This function is called to get the _CRS value of an object
118 *              contained in an object specified by the handle passed in
119 *
120 *              If the function fails an appropriate status will be returned
121 *              and the contents of the callers buffer is undefined.
122 *
123 ******************************************************************************/
124
125acpi_status
126acpi_rs_get_crs_method_data (
127	acpi_handle                     handle,
128	struct acpi_buffer              *ret_buffer)
129{
130	union acpi_operand_object       *obj_desc;
131	acpi_status                     status;
132
133
134	ACPI_FUNCTION_TRACE ("rs_get_crs_method_data");
135
136
137	/* Parameters guaranteed valid by caller */
138
139	/*
140	 * Execute the method, no parameters
141	 */
142	status = acpi_ut_evaluate_object (handle, "_CRS", ACPI_BTYPE_BUFFER, &obj_desc);
143	if (ACPI_FAILURE (status)) {
144		return_ACPI_STATUS (status);
145	}
146
147	/*
148	 * Make the call to create a resource linked list from the
149	 * byte stream buffer that comes back from the _CRS method
150	 * execution.
151	 */
152	status = acpi_rs_create_resource_list (obj_desc, ret_buffer);
153
154	/* on exit, we must delete the object returned by evaluate_object */
155
156	acpi_ut_remove_reference (obj_desc);
157	return_ACPI_STATUS (status);
158}
159
160
161/*******************************************************************************
162 *
163 * FUNCTION:    acpi_rs_get_prs_method_data
164 *
165 * PARAMETERS:  Handle          - a handle to the containing object
166 *              ret_buffer      - a pointer to a buffer structure for the
167 *                                  results
168 *
169 * RETURN:      Status
170 *
171 * DESCRIPTION: This function is called to get the _PRS value of an object
172 *              contained in an object specified by the handle passed in
173 *
174 *              If the function fails an appropriate status will be returned
175 *              and the contents of the callers buffer is undefined.
176 *
177 ******************************************************************************/
178#ifdef ACPI_FUTURE_USAGE
179acpi_status
180acpi_rs_get_prs_method_data (
181	acpi_handle                     handle,
182	struct acpi_buffer              *ret_buffer)
183{
184	union acpi_operand_object       *obj_desc;
185	acpi_status                     status;
186
187
188	ACPI_FUNCTION_TRACE ("rs_get_prs_method_data");
189
190
191	/* Parameters guaranteed valid by caller */
192
193	/*
194	 * Execute the method, no parameters
195	 */
196	status = acpi_ut_evaluate_object (handle, "_PRS", ACPI_BTYPE_BUFFER, &obj_desc);
197	if (ACPI_FAILURE (status)) {
198		return_ACPI_STATUS (status);
199	}
200
201	/*
202	 * Make the call to create a resource linked list from the
203	 * byte stream buffer that comes back from the _CRS method
204	 * execution.
205	 */
206	status = acpi_rs_create_resource_list (obj_desc, ret_buffer);
207
208	/* on exit, we must delete the object returned by evaluate_object */
209
210	acpi_ut_remove_reference (obj_desc);
211	return_ACPI_STATUS (status);
212}
213#endif  /*  ACPI_FUTURE_USAGE  */
214
215
216/*******************************************************************************
217 *
218 * FUNCTION:    acpi_rs_get_method_data
219 *
220 * PARAMETERS:  Handle          - a handle to the containing object
221 *              ret_buffer      - a pointer to a buffer structure for the
222 *                                  results
223 *
224 * RETURN:      Status
225 *
226 * DESCRIPTION: This function is called to get the _CRS or _PRS value of an
227 *              object contained in an object specified by the handle passed in
228 *
229 *              If the function fails an appropriate status will be returned
230 *              and the contents of the callers buffer is undefined.
231 *
232 ******************************************************************************/
233
234acpi_status
235acpi_rs_get_method_data (
236	acpi_handle                     handle,
237	char                            *path,
238	struct acpi_buffer              *ret_buffer)
239{
240	union acpi_operand_object       *obj_desc;
241	acpi_status                     status;
242
243
244	ACPI_FUNCTION_TRACE ("rs_get_method_data");
245
246
247	/* Parameters guaranteed valid by caller */
248
249	/*
250	 * Execute the method, no parameters
251	 */
252	status = acpi_ut_evaluate_object (handle, path, ACPI_BTYPE_BUFFER, &obj_desc);
253	if (ACPI_FAILURE (status)) {
254		return_ACPI_STATUS (status);
255	}
256
257	/*
258	 * Make the call to create a resource linked list from the
259	 * byte stream buffer that comes back from the method
260	 * execution.
261	 */
262	status = acpi_rs_create_resource_list (obj_desc, ret_buffer);
263
264	/* On exit, we must delete the object returned by evaluate_object */
265
266	acpi_ut_remove_reference (obj_desc);
267	return_ACPI_STATUS (status);
268}
269
270/*******************************************************************************
271 *
272 * FUNCTION:    acpi_rs_set_srs_method_data
273 *
274 * PARAMETERS:  Handle          - a handle to the containing object
275 *              in_buffer       - a pointer to a buffer structure of the
276 *                                  parameter
277 *
278 * RETURN:      Status
279 *
280 * DESCRIPTION: This function is called to set the _SRS of an object contained
281 *              in an object specified by the handle passed in
282 *
283 *              If the function fails an appropriate status will be returned
284 *              and the contents of the callers buffer is undefined.
285 *
286 ******************************************************************************/
287
288acpi_status
289acpi_rs_set_srs_method_data (
290	acpi_handle                     handle,
291	struct acpi_buffer              *in_buffer)
292{
293	struct acpi_parameter_info      info;
294	union acpi_operand_object       *params[2];
295	acpi_status                     status;
296	struct acpi_buffer              buffer;
297
298
299	ACPI_FUNCTION_TRACE ("rs_set_srs_method_data");
300
301
302	/* Parameters guaranteed valid by caller */
303
304	/*
305	 * The in_buffer parameter will point to a linked list of
306	 * resource parameters.  It needs to be formatted into a
307	 * byte stream to be sent in as an input parameter to _SRS
308	 *
309	 * Convert the linked list into a byte stream
310	 */
311	buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER;
312	status = acpi_rs_create_byte_stream (in_buffer->pointer, &buffer);
313	if (ACPI_FAILURE (status)) {
314		return_ACPI_STATUS (status);
315	}
316
317	/*
318	 * Init the param object
319	 */
320	params[0] = acpi_ut_create_internal_object (ACPI_TYPE_BUFFER);
321	if (!params[0]) {
322		acpi_os_free (buffer.pointer);
323		return_ACPI_STATUS (AE_NO_MEMORY);
324	}
325
326	/*
327	 * Set up the parameter object
328	 */
329	params[0]->buffer.length  = (u32) buffer.length;
330	params[0]->buffer.pointer = buffer.pointer;
331	params[0]->common.flags   = AOPOBJ_DATA_VALID;
332	params[1] = NULL;
333
334	info.node = handle;
335	info.parameters = params;
336	info.parameter_type = ACPI_PARAM_ARGS;
337
338	/*
339	 * Execute the method, no return value
340	 */
341	status = acpi_ns_evaluate_relative ("_SRS", &info);
342	if (ACPI_SUCCESS (status)) {
343		/* Delete any return object (especially if implicit_return is enabled) */
344
345		if (info.return_object) {
346			acpi_ut_remove_reference (info.return_object);
347		}
348	}
349
350	/*
351	 * Clean up and return the status from acpi_ns_evaluate_relative
352	 */
353	acpi_ut_remove_reference (params[0]);
354	return_ACPI_STATUS (status);
355}
356