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[TG3]: Set minimal hw interrupt mitigation.
[linux-2.6/verdex.git] / drivers / acpi / resources / rscreate.c
bloba3a0cbfda68dd1dc5fa0c79749e11ce7df6f548e
1 /*******************************************************************************
2 *
3 * Module Name: rscreate - Create resource lists/tables
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/acresrc.h>
47 #include <acpi/amlcode.h>
48 #include <acpi/acnamesp.h>
49
50 #define _COMPONENT ACPI_RESOURCES
51 ACPI_MODULE_NAME ("rscreate")
52
53
54 /*******************************************************************************
55 *
56 * FUNCTION: acpi_rs_create_resource_list
57 *
58 * PARAMETERS: byte_stream_buffer - Pointer to the resource byte stream
59 * output_buffer - Pointer to the user's buffer
60 *
61 * RETURN: Status - AE_OK if okay, else a valid acpi_status code
62 * If output_buffer is not large enough, output_buffer_length
63 * indicates how large output_buffer should be, else it
64 * indicates how may u8 elements of output_buffer are valid.
65 *
66 * DESCRIPTION: Takes the byte stream returned from a _CRS, _PRS control method
67 * execution and parses the stream to create a linked list
68 * of device resources.
69 *
70 ******************************************************************************/
71
72 acpi_status
73 acpi_rs_create_resource_list (
74 union acpi_operand_object *byte_stream_buffer,
75 struct acpi_buffer *output_buffer)
76 {
77
78 acpi_status status;
79 u8 *byte_stream_start;
80 acpi_size list_size_needed = 0;
81 u32 byte_stream_buffer_length;
82
83
84 ACPI_FUNCTION_TRACE ("rs_create_resource_list");
85
86
87 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "byte_stream_buffer = %p\n",
88 byte_stream_buffer));
89
90 /*
91 * Params already validated, so we don't re-validate here
92 */
93 byte_stream_buffer_length = byte_stream_buffer->buffer.length;
94 byte_stream_start = byte_stream_buffer->buffer.pointer;
95
96 /*
97 * Pass the byte_stream_buffer into a module that can calculate
98 * the buffer size needed for the linked list
99 */
100 status = acpi_rs_get_list_length (byte_stream_start, byte_stream_buffer_length,
101 &list_size_needed);
102
103 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "Status=%X list_size_needed=%X\n",
104 status, (u32) list_size_needed));
105 if (ACPI_FAILURE (status)) {
106 return_ACPI_STATUS (status);
107 }
108
109 /* Validate/Allocate/Clear caller buffer */
110
111 status = acpi_ut_initialize_buffer (output_buffer, list_size_needed);
112 if (ACPI_FAILURE (status)) {
113 return_ACPI_STATUS (status);
114 }
115
116 /* Do the conversion */
117
118 status = acpi_rs_byte_stream_to_list (byte_stream_start, byte_stream_buffer_length,
119 output_buffer->pointer);
120 if (ACPI_FAILURE (status)) {
121 return_ACPI_STATUS (status);
122 }
123
124 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "output_buffer %p Length %X\n",
125 output_buffer->pointer, (u32) output_buffer->length));
126 return_ACPI_STATUS (AE_OK);
127 }
128
129
130 /*******************************************************************************
131 *
132 * FUNCTION: acpi_rs_create_pci_routing_table
133 *
134 * PARAMETERS: package_object - Pointer to an union acpi_operand_object
135 * package
136 * output_buffer - Pointer to the user's buffer
137 *
138 * RETURN: Status AE_OK if okay, else a valid acpi_status code.
139 * If the output_buffer is too small, the error will be
140 * AE_BUFFER_OVERFLOW and output_buffer->Length will point
141 * to the size buffer needed.
142 *
143 * DESCRIPTION: Takes the union acpi_operand_object package and creates a
144 * linked list of PCI interrupt descriptions
145 *
146 * NOTE: It is the caller's responsibility to ensure that the start of the
147 * output buffer is aligned properly (if necessary).
148 *
149 ******************************************************************************/
150
151 acpi_status
152 acpi_rs_create_pci_routing_table (
153 union acpi_operand_object *package_object,
154 struct acpi_buffer *output_buffer)
155 {
156 u8 *buffer;
157 union acpi_operand_object **top_object_list;
158 union acpi_operand_object **sub_object_list;
159 union acpi_operand_object *obj_desc;
160 acpi_size buffer_size_needed = 0;
161 u32 number_of_elements;
162 u32 index;
163 struct acpi_pci_routing_table *user_prt;
164 struct acpi_namespace_node *node;
165 acpi_status status;
166 struct acpi_buffer path_buffer;
167
168
169 ACPI_FUNCTION_TRACE ("rs_create_pci_routing_table");
170
171
172 /* Params already validated, so we don't re-validate here */
173
174 /*
175 * Get the required buffer length
176 */
177 status = acpi_rs_get_pci_routing_table_length (package_object,
178 &buffer_size_needed);
179 if (ACPI_FAILURE (status)) {
180 return_ACPI_STATUS (status);
181 }
182
183 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "buffer_size_needed = %X\n",
184 (u32) buffer_size_needed));
185
186 /* Validate/Allocate/Clear caller buffer */
187
188 status = acpi_ut_initialize_buffer (output_buffer, buffer_size_needed);
189 if (ACPI_FAILURE (status)) {
190 return_ACPI_STATUS (status);
191 }
192
193 /*
194 * Loop through the ACPI_INTERNAL_OBJECTS - Each object
195 * should be a package that in turn contains an
196 * acpi_integer Address, a u8 Pin, a Name and a u8 source_index.
197 */
198 top_object_list = package_object->package.elements;
199 number_of_elements = package_object->package.count;
200 buffer = output_buffer->pointer;
201 user_prt = ACPI_CAST_PTR (struct acpi_pci_routing_table, buffer);
202
203 for (index = 0; index < number_of_elements; index++) {
204 /*
205 * Point user_prt past this current structure
206 *
207 * NOTE: On the first iteration, user_prt->Length will
208 * be zero because we cleared the return buffer earlier
209 */
210 buffer += user_prt->length;
211 user_prt = ACPI_CAST_PTR (struct acpi_pci_routing_table, buffer);
212
213 /*
214 * Fill in the Length field with the information we have at this point.
215 * The minus four is to subtract the size of the u8 Source[4] member
216 * because it is added below.
217 */
218 user_prt->length = (sizeof (struct acpi_pci_routing_table) - 4);
219
220 /*
221 * Each element of the top-level package must also be a package
222 */
223 if (ACPI_GET_OBJECT_TYPE (*top_object_list) != ACPI_TYPE_PACKAGE) {
224 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
225 "(PRT[%X]) Need sub-package, found %s\n",
226 index, acpi_ut_get_object_type_name (*top_object_list)));
227 return_ACPI_STATUS (AE_AML_OPERAND_TYPE);
228 }
229
230 /* Each sub-package must be of length 4 */
231
232 if ((*top_object_list)->package.count != 4) {
233 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
234 "(PRT[%X]) Need package of length 4, found length %d\n",
235 index, (*top_object_list)->package.count));
236 return_ACPI_STATUS (AE_AML_PACKAGE_LIMIT);
237 }
238
239 /*
240 * Dereference the sub-package.
241 * The sub_object_list will now point to an array of the four IRQ
242 * elements: [Address, Pin, Source, source_index]
243 */
244 sub_object_list = (*top_object_list)->package.elements;
245
246 /*
247 * 1) First subobject: Dereference the PRT.Address
248 */
249 obj_desc = sub_object_list[0];
250 if (ACPI_GET_OBJECT_TYPE (obj_desc) == ACPI_TYPE_INTEGER) {
251 user_prt->address = obj_desc->integer.value;
252 }
253 else {
254 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
255 "(PRT[%X].Address) Need Integer, found %s\n",
256 index, acpi_ut_get_object_type_name (obj_desc)));
257 return_ACPI_STATUS (AE_BAD_DATA);
258 }
259
260 /*
261 * 2) Second subobject: Dereference the PRT.Pin
262 */
263 obj_desc = sub_object_list[1];
264 if (ACPI_GET_OBJECT_TYPE (obj_desc) == ACPI_TYPE_INTEGER) {
265 user_prt->pin = (u32) obj_desc->integer.value;
266 }
267 else {
268 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
269 "(PRT[%X].Pin) Need Integer, found %s\n",
270 index, acpi_ut_get_object_type_name (obj_desc)));
271 return_ACPI_STATUS (AE_BAD_DATA);
272 }
273
274 /*
275 * 3) Third subobject: Dereference the PRT.source_name
276 */
277 obj_desc = sub_object_list[2];
278 switch (ACPI_GET_OBJECT_TYPE (obj_desc)) {
279 case ACPI_TYPE_LOCAL_REFERENCE:
280
281 if (obj_desc->reference.opcode != AML_INT_NAMEPATH_OP) {
282 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
283 "(PRT[%X].Source) Need name, found reference op %X\n",
284 index, obj_desc->reference.opcode));
285 return_ACPI_STATUS (AE_BAD_DATA);
286 }
287
288 node = obj_desc->reference.node;
289
290 /* Use *remaining* length of the buffer as max for pathname */
291
292 path_buffer.length = output_buffer->length -
293 (u32) ((u8 *) user_prt->source -
294 (u8 *) output_buffer->pointer);
295 path_buffer.pointer = user_prt->source;
296
297 status = acpi_ns_handle_to_pathname ((acpi_handle) node, &path_buffer);
298
299 user_prt->length += (u32) ACPI_STRLEN (user_prt->source) + 1; /* include null terminator */
300 break;
301
302
303 case ACPI_TYPE_STRING:
304
305 ACPI_STRCPY (user_prt->source, obj_desc->string.pointer);
306
307 /* Add to the Length field the length of the string (add 1 for terminator) */
308
309 user_prt->length += obj_desc->string.length + 1;
310 break;
311
312
313 case ACPI_TYPE_INTEGER:
314 /*
315 * If this is a number, then the Source Name is NULL, since the
316 * entire buffer was zeroed out, we can leave this alone.
317 *
318 * Add to the Length field the length of the u32 NULL
319 */
320 user_prt->length += sizeof (u32);
321 break;
322
323
324 default:
325
326 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
327 "(PRT[%X].Source) Need Ref/String/Integer, found %s\n",
328 index, acpi_ut_get_object_type_name (obj_desc)));
329 return_ACPI_STATUS (AE_BAD_DATA);
330 }
331
332 /* Now align the current length */
333
334 user_prt->length = (u32) ACPI_ROUND_UP_to_64_bITS (user_prt->length);
335
336 /*
337 * 4) Fourth subobject: Dereference the PRT.source_index
338 */
339 obj_desc = sub_object_list[3];
340 if (ACPI_GET_OBJECT_TYPE (obj_desc) == ACPI_TYPE_INTEGER) {
341 user_prt->source_index = (u32) obj_desc->integer.value;
342 }
343 else {
344 ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
345 "(PRT[%X].source_index) Need Integer, found %s\n",
346 index, acpi_ut_get_object_type_name (obj_desc)));
347 return_ACPI_STATUS (AE_BAD_DATA);
348 }
349
350 /* Point to the next union acpi_operand_object in the top level package */
351
352 top_object_list++;
353 }
354
355 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "output_buffer %p Length %X\n",
356 output_buffer->pointer, (u32) output_buffer->length));
357 return_ACPI_STATUS (AE_OK);
358 }
359
360
361 /*******************************************************************************
362 *
363 * FUNCTION: acpi_rs_create_byte_stream
364 *
365 * PARAMETERS: linked_list_buffer - Pointer to the resource linked list
366 * output_buffer - Pointer to the user's buffer
367 *
368 * RETURN: Status AE_OK if okay, else a valid acpi_status code.
369 * If the output_buffer is too small, the error will be
370 * AE_BUFFER_OVERFLOW and output_buffer->Length will point
371 * to the size buffer needed.
372 *
373 * DESCRIPTION: Takes the linked list of device resources and
374 * creates a bytestream to be used as input for the
375 * _SRS control method.
376 *
377 ******************************************************************************/
378
379 acpi_status
380 acpi_rs_create_byte_stream (
381 struct acpi_resource *linked_list_buffer,
382 struct acpi_buffer *output_buffer)
383 {
384 acpi_status status;
385 acpi_size byte_stream_size_needed = 0;
386
387
388 ACPI_FUNCTION_TRACE ("rs_create_byte_stream");
389
390
391 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "linked_list_buffer = %p\n",
392 linked_list_buffer));
393
394 /*
395 * Params already validated, so we don't re-validate here
396 *
397 * Pass the linked_list_buffer into a module that calculates
398 * the buffer size needed for the byte stream.
399 */
400 status = acpi_rs_get_byte_stream_length (linked_list_buffer,
401 &byte_stream_size_needed);
402
403 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "byte_stream_size_needed=%X, %s\n",
404 (u32) byte_stream_size_needed, acpi_format_exception (status)));
405 if (ACPI_FAILURE (status)) {
406 return_ACPI_STATUS (status);
407 }
408
409 /* Validate/Allocate/Clear caller buffer */
410
411 status = acpi_ut_initialize_buffer (output_buffer, byte_stream_size_needed);
412 if (ACPI_FAILURE (status)) {
413 return_ACPI_STATUS (status);
414 }
415
416 /* Do the conversion */
417
418 status = acpi_rs_list_to_byte_stream (linked_list_buffer, byte_stream_size_needed,
419 output_buffer->pointer);
420 if (ACPI_FAILURE (status)) {
421 return_ACPI_STATUS (status);
422 }
423
424 ACPI_DEBUG_PRINT ((ACPI_DB_INFO, "output_buffer %p Length %X\n",
425 output_buffer->pointer, (u32) output_buffer->length));
426 return_ACPI_STATUS (AE_OK);
427 }
428
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