drivers/acpi/resources/rsutils.c

   1 /*******************************************************************************
   2  *
   3  * Module Name: rsutils - Utilities for the resource manager
   4  *
   5  ******************************************************************************/
   6
   7 /*
   8  * Copyright (C) 2000 - 2004, 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
  72 acpi_status
  73 acpi_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
 125 acpi_status
 126 acpi_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
 179 acpi_status
 180 acpi_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
 214
 215 /*******************************************************************************
 216  *
 217  * FUNCTION:    acpi_rs_get_method_data
 218  *
 219  * PARAMETERS:  Handle          - a handle to the containing object
 220  *              ret_buffer      - a pointer to a buffer structure for the
 221  *                                  results
 222  *
 223  * RETURN:      Status
 224  *
 225  * DESCRIPTION: This function is called to get the _CRS or _PRS value of an
 226  *              object contained in an object specified by the handle passed in
 227  *
 228  *              If the function fails an appropriate status will be returned
 229  *              and the contents of the callers buffer is undefined.
 230  *
 231  ******************************************************************************/
 232
 233 acpi_status
 234 acpi_rs_get_method_data (
 235         acpi_handle                     handle,
 236         char                            *path,
 237         struct acpi_buffer              *ret_buffer)
 238 {
 239         union acpi_operand_object       *obj_desc;
 240         acpi_status                     status;
 241
 242
 243         ACPI_FUNCTION_TRACE ("rs_get_method_data");
 244
 245
 246         /* Parameters guaranteed valid by caller */
 247
 248         /*
 249          * Execute the method, no parameters
 250          */
 251         status = acpi_ut_evaluate_object (handle, path, ACPI_BTYPE_BUFFER, &obj_desc);
 252         if (ACPI_FAILURE (status)) {
 253                 return_ACPI_STATUS (status);
 254         }
 255
 256         /*
 257          * Make the call to create a resource linked list from the
 258          * byte stream buffer that comes back from the method
 259          * execution.
 260          */
 261         status = acpi_rs_create_resource_list (obj_desc, ret_buffer);
 262
 263         /* On exit, we must delete the object returned by evaluate_object */
 264
 265         acpi_ut_remove_reference (obj_desc);
 266         return_ACPI_STATUS (status);
 267 }
 268
 269 /*******************************************************************************
 270  *
 271  * FUNCTION:    acpi_rs_set_srs_method_data
 272  *
 273  * PARAMETERS:  Handle          - a handle to the containing object
 274  *              in_buffer       - a pointer to a buffer structure of the
 275  *                                  parameter
 276  *
 277  * RETURN:      Status
 278  *
 279  * DESCRIPTION: This function is called to set the _SRS of an object contained
 280  *              in an object specified by the handle passed in
 281  *
 282  *              If the function fails an appropriate status will be returned
 283  *              and the contents of the callers buffer is undefined.
 284  *
 285  ******************************************************************************/
 286
 287 acpi_status
 288 acpi_rs_set_srs_method_data (
 289         acpi_handle                     handle,
 290         struct acpi_buffer              *in_buffer)
 291 {
 292         struct acpi_parameter_info      info;
 293         union acpi_operand_object       *params[2];
 294         acpi_status                     status;
 295         struct acpi_buffer              buffer;
 296
 297
 298         ACPI_FUNCTION_TRACE ("rs_set_srs_method_data");
 299
 300
 301         /* Parameters guaranteed valid by caller */
 302
 303         /*
 304          * The in_buffer parameter will point to a linked list of
 305          * resource parameters.  It needs to be formatted into a
 306          * byte stream to be sent in as an input parameter to _SRS
 307          *
 308          * Convert the linked list into a byte stream
 309          */
 310         buffer.length = ACPI_ALLOCATE_LOCAL_BUFFER;
 311         status = acpi_rs_create_byte_stream (in_buffer->pointer, &buffer);
 312         if (ACPI_FAILURE (status)) {
 313                 return_ACPI_STATUS (status);
 314         }
 315
 316         /*
 317          * Init the param object
 318          */
 319         params[0] = acpi_ut_create_internal_object (ACPI_TYPE_BUFFER);
 320         if (!params[0]) {
 321                 acpi_os_free (buffer.pointer);
 322                 return_ACPI_STATUS (AE_NO_MEMORY);
 323         }
 324
 325         /*
 326          * Set up the parameter object
 327          */
 328         params[0]->buffer.length  = (u32) buffer.length;
 329         params[0]->buffer.pointer = buffer.pointer;
 330         params[0]->common.flags   = AOPOBJ_DATA_VALID;
 331         params[1] = NULL;
 332
 333         info.node = handle;
 334         info.parameters = params;
 335         info.parameter_type = ACPI_PARAM_ARGS;
 336
 337         /*
 338          * Execute the method, no return value
 339          */
 340         status = acpi_ns_evaluate_relative ("_SRS", &info);
 341
 342         /*
 343          * Clean up and return the status from acpi_ns_evaluate_relative
 344          */
 345         acpi_ut_remove_reference (params[0]);
 346         return_ACPI_STATUS (status);
 347 }
 348