Commit | Line | Data |
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1da177e4 LT |
1 | /******************************************************************************* |
2 | * | |
3 | * Module Name: rscalc - Calculate stream and list lengths | |
4 | * | |
5 | ******************************************************************************/ | |
6 | ||
7 | /* | |
25f044e6 | 8 | * Copyright (C) 2000 - 2013, Intel Corp. |
1da177e4 LT |
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 | ||
1da177e4 | 44 | #include <acpi/acpi.h> |
e2f7a777 LB |
45 | #include "accommon.h" |
46 | #include "acresrc.h" | |
47 | #include "acnamesp.h" | |
1da177e4 LT |
48 | |
49 | #define _COMPONENT ACPI_RESOURCES | |
4be44fcd | 50 | ACPI_MODULE_NAME("rscalc") |
1da177e4 | 51 | |
bda663d3 | 52 | /* Local prototypes */ |
bda663d3 RM |
53 | static u8 acpi_rs_count_set_bits(u16 bit_field); |
54 | ||
0897831b | 55 | static acpi_rs_length |
bda663d3 RM |
56 | acpi_rs_struct_option_length(struct acpi_resource_source *resource_source); |
57 | ||
58 | static u32 | |
59 | acpi_rs_stream_option_length(u32 resource_length, u32 minimum_total_length); | |
60 | ||
1da177e4 LT |
61 | /******************************************************************************* |
62 | * | |
bda663d3 | 63 | * FUNCTION: acpi_rs_count_set_bits |
1da177e4 | 64 | * |
bda663d3 | 65 | * PARAMETERS: bit_field - Field in which to count bits |
1da177e4 | 66 | * |
bda663d3 | 67 | * RETURN: Number of bits set within the field |
1da177e4 | 68 | * |
bda663d3 RM |
69 | * DESCRIPTION: Count the number of bits set in a resource field. Used for |
70 | * (Short descriptor) interrupt and DMA lists. | |
1da177e4 LT |
71 | * |
72 | ******************************************************************************/ | |
1da177e4 | 73 | |
bda663d3 RM |
74 | static u8 acpi_rs_count_set_bits(u16 bit_field) |
75 | { | |
67a119f9 | 76 | u8 bits_set; |
44f6c012 | 77 | |
bda663d3 | 78 | ACPI_FUNCTION_ENTRY(); |
1da177e4 | 79 | |
bda663d3 | 80 | for (bits_set = 0; bit_field; bits_set++) { |
52fc0b02 | 81 | |
bda663d3 | 82 | /* Zero the least significant bit that is set */ |
1da177e4 | 83 | |
1d18c058 | 84 | bit_field &= (u16) (bit_field - 1); |
bda663d3 | 85 | } |
1da177e4 | 86 | |
9c0d7939 | 87 | return (bits_set); |
bda663d3 | 88 | } |
1da177e4 | 89 | |
1da177e4 LT |
90 | /******************************************************************************* |
91 | * | |
bda663d3 | 92 | * FUNCTION: acpi_rs_struct_option_length |
1da177e4 | 93 | * |
bda663d3 | 94 | * PARAMETERS: resource_source - Pointer to optional descriptor field |
1da177e4 LT |
95 | * |
96 | * RETURN: Status | |
97 | * | |
bda663d3 RM |
98 | * DESCRIPTION: Common code to handle optional resource_source_index and |
99 | * resource_source fields in some Large descriptors. Used during | |
100 | * list-to-stream conversion | |
1da177e4 LT |
101 | * |
102 | ******************************************************************************/ | |
103 | ||
0897831b | 104 | static acpi_rs_length |
bda663d3 | 105 | acpi_rs_struct_option_length(struct acpi_resource_source *resource_source) |
1da177e4 | 106 | { |
bda663d3 RM |
107 | ACPI_FUNCTION_ENTRY(); |
108 | ||
109 | /* | |
110 | * If the resource_source string is valid, return the size of the string | |
111 | * (string_length includes the NULL terminator) plus the size of the | |
112 | * resource_source_index (1). | |
113 | */ | |
114 | if (resource_source->string_ptr) { | |
0897831b | 115 | return ((acpi_rs_length) (resource_source->string_length + 1)); |
bda663d3 | 116 | } |
1da177e4 | 117 | |
bda663d3 RM |
118 | return (0); |
119 | } | |
1da177e4 | 120 | |
bda663d3 RM |
121 | /******************************************************************************* |
122 | * | |
123 | * FUNCTION: acpi_rs_stream_option_length | |
124 | * | |
125 | * PARAMETERS: resource_length - Length from the resource header | |
126 | * minimum_total_length - Minimum length of this resource, before | |
127 | * any optional fields. Includes header size | |
128 | * | |
129 | * RETURN: Length of optional string (0 if no string present) | |
130 | * | |
131 | * DESCRIPTION: Common code to handle optional resource_source_index and | |
132 | * resource_source fields in some Large descriptors. Used during | |
133 | * stream-to-list conversion | |
134 | * | |
135 | ******************************************************************************/ | |
1da177e4 | 136 | |
bda663d3 | 137 | static u32 |
50eca3eb BM |
138 | acpi_rs_stream_option_length(u32 resource_length, |
139 | u32 minimum_aml_resource_length) | |
bda663d3 RM |
140 | { |
141 | u32 string_length = 0; | |
1da177e4 | 142 | |
bda663d3 | 143 | ACPI_FUNCTION_ENTRY(); |
1da177e4 | 144 | |
bda663d3 RM |
145 | /* |
146 | * The resource_source_index and resource_source are optional elements of some | |
147 | * Large-type resource descriptors. | |
148 | */ | |
44f6c012 | 149 | |
bda663d3 RM |
150 | /* |
151 | * If the length of the actual resource descriptor is greater than the ACPI | |
152 | * spec-defined minimum length, it means that a resource_source_index exists | |
153 | * and is followed by a (required) null terminated string. The string length | |
154 | * (including the null terminator) is the resource length minus the minimum | |
155 | * length, minus one byte for the resource_source_index itself. | |
156 | */ | |
50eca3eb | 157 | if (resource_length > minimum_aml_resource_length) { |
52fc0b02 | 158 | |
bda663d3 | 159 | /* Compute the length of the optional string */ |
1da177e4 | 160 | |
50eca3eb BM |
161 | string_length = |
162 | resource_length - minimum_aml_resource_length - 1; | |
bda663d3 | 163 | } |
1da177e4 | 164 | |
ea936b78 BM |
165 | /* |
166 | * Round the length up to a multiple of the native word in order to | |
167 | * guarantee that the entire resource descriptor is native word aligned | |
168 | */ | |
169 | return ((u32) ACPI_ROUND_UP_TO_NATIVE_WORD(string_length)); | |
bda663d3 | 170 | } |
1da177e4 | 171 | |
bda663d3 RM |
172 | /******************************************************************************* |
173 | * | |
50eca3eb | 174 | * FUNCTION: acpi_rs_get_aml_length |
bda663d3 | 175 | * |
ba494bee | 176 | * PARAMETERS: resource - Pointer to the resource linked list |
bda663d3 RM |
177 | * size_needed - Where the required size is returned |
178 | * | |
179 | * RETURN: Status | |
180 | * | |
181 | * DESCRIPTION: Takes a linked list of internal resource descriptors and | |
182 | * calculates the size buffer needed to hold the corresponding | |
183 | * external resource byte stream. | |
184 | * | |
185 | ******************************************************************************/ | |
1da177e4 | 186 | |
bda663d3 | 187 | acpi_status |
50eca3eb | 188 | acpi_rs_get_aml_length(struct acpi_resource * resource, acpi_size * size_needed) |
bda663d3 | 189 | { |
50eca3eb | 190 | acpi_size aml_size_needed = 0; |
0897831b | 191 | acpi_rs_length total_size; |
1da177e4 | 192 | |
b229cf92 | 193 | ACPI_FUNCTION_TRACE(rs_get_aml_length); |
1da177e4 | 194 | |
bda663d3 | 195 | /* Traverse entire list of internal resource descriptors */ |
1da177e4 | 196 | |
bda663d3 | 197 | while (resource) { |
52fc0b02 | 198 | |
bda663d3 | 199 | /* Validate the descriptor type */ |
1da177e4 | 200 | |
50eca3eb | 201 | if (resource->type > ACPI_RESOURCE_TYPE_MAX) { |
bda663d3 RM |
202 | return_ACPI_STATUS(AE_AML_INVALID_RESOURCE_TYPE); |
203 | } | |
44f6c012 | 204 | |
c13085e5 BM |
205 | /* Sanity check the length. It must not be zero, or we loop forever */ |
206 | ||
207 | if (!resource->length) { | |
208 | return_ACPI_STATUS(AE_AML_BAD_RESOURCE_LENGTH); | |
209 | } | |
210 | ||
bda663d3 | 211 | /* Get the base size of the (external stream) resource descriptor */ |
1da177e4 | 212 | |
0897831b | 213 | total_size = acpi_gbl_aml_resource_sizes[resource->type]; |
1da177e4 | 214 | |
bda663d3 RM |
215 | /* |
216 | * Augment the base size for descriptors with optional and/or | |
217 | * variable-length fields | |
218 | */ | |
219 | switch (resource->type) { | |
1d5b285d BM |
220 | case ACPI_RESOURCE_TYPE_IRQ: |
221 | ||
66d3ca9e BM |
222 | /* Length can be 3 or 2 */ |
223 | ||
1d5b285d BM |
224 | if (resource->data.irq.descriptor_length == 2) { |
225 | total_size--; | |
226 | } | |
227 | break; | |
228 | ||
66d3ca9e BM |
229 | case ACPI_RESOURCE_TYPE_START_DEPENDENT: |
230 | ||
231 | /* Length can be 1 or 0 */ | |
232 | ||
233 | if (resource->data.irq.descriptor_length == 0) { | |
234 | total_size--; | |
235 | } | |
236 | break; | |
237 | ||
50eca3eb | 238 | case ACPI_RESOURCE_TYPE_VENDOR: |
1da177e4 | 239 | /* |
bda663d3 RM |
240 | * Vendor Defined Resource: |
241 | * For a Vendor Specific resource, if the Length is between 1 and 7 | |
242 | * it will be created as a Small Resource data type, otherwise it | |
243 | * is a Large Resource data type. | |
1da177e4 | 244 | */ |
50eca3eb | 245 | if (resource->data.vendor.byte_length > 7) { |
52fc0b02 | 246 | |
bda663d3 | 247 | /* Base size of a Large resource descriptor */ |
1da177e4 | 248 | |
0897831b | 249 | total_size = |
50eca3eb | 250 | sizeof(struct aml_resource_large_header); |
1da177e4 LT |
251 | } |
252 | ||
bda663d3 | 253 | /* Add the size of the vendor-specific data */ |
44f6c012 | 254 | |
0897831b BM |
255 | total_size = (acpi_rs_length) |
256 | (total_size + resource->data.vendor.byte_length); | |
1da177e4 LT |
257 | break; |
258 | ||
50eca3eb | 259 | case ACPI_RESOURCE_TYPE_END_TAG: |
1da177e4 | 260 | /* |
bda663d3 RM |
261 | * End Tag: |
262 | * We are done -- return the accumulated total size. | |
1da177e4 | 263 | */ |
0897831b | 264 | *size_needed = aml_size_needed + total_size; |
1da177e4 | 265 | |
bda663d3 | 266 | /* Normal exit */ |
1da177e4 | 267 | |
bda663d3 | 268 | return_ACPI_STATUS(AE_OK); |
1da177e4 | 269 | |
50eca3eb | 270 | case ACPI_RESOURCE_TYPE_ADDRESS16: |
1da177e4 | 271 | /* |
bda663d3 RM |
272 | * 16-Bit Address Resource: |
273 | * Add the size of the optional resource_source info | |
1da177e4 | 274 | */ |
0897831b BM |
275 | total_size = (acpi_rs_length) |
276 | (total_size + | |
277 | acpi_rs_struct_option_length(&resource->data. | |
278 | address16. | |
279 | resource_source)); | |
1da177e4 LT |
280 | break; |
281 | ||
50eca3eb | 282 | case ACPI_RESOURCE_TYPE_ADDRESS32: |
1da177e4 | 283 | /* |
bda663d3 RM |
284 | * 32-Bit Address Resource: |
285 | * Add the size of the optional resource_source info | |
1da177e4 | 286 | */ |
0897831b BM |
287 | total_size = (acpi_rs_length) |
288 | (total_size + | |
289 | acpi_rs_struct_option_length(&resource->data. | |
290 | address32. | |
291 | resource_source)); | |
1da177e4 LT |
292 | break; |
293 | ||
50eca3eb | 294 | case ACPI_RESOURCE_TYPE_ADDRESS64: |
1da177e4 | 295 | /* |
bda663d3 RM |
296 | * 64-Bit Address Resource: |
297 | * Add the size of the optional resource_source info | |
1da177e4 | 298 | */ |
0897831b BM |
299 | total_size = (acpi_rs_length) |
300 | (total_size + | |
301 | acpi_rs_struct_option_length(&resource->data. | |
302 | address64. | |
303 | resource_source)); | |
1da177e4 LT |
304 | break; |
305 | ||
50eca3eb | 306 | case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: |
1da177e4 | 307 | /* |
bda663d3 RM |
308 | * Extended IRQ Resource: |
309 | * Add the size of each additional optional interrupt beyond the | |
310 | * required 1 (4 bytes for each u32 interrupt number) | |
1da177e4 | 311 | */ |
0897831b BM |
312 | total_size = (acpi_rs_length) |
313 | (total_size + | |
314 | ((resource->data.extended_irq.interrupt_count - | |
315 | 1) * 4) + | |
316 | /* Add the size of the optional resource_source info */ | |
317 | acpi_rs_struct_option_length(&resource->data. | |
318 | extended_irq. | |
319 | resource_source)); | |
bda663d3 | 320 | break; |
1da177e4 | 321 | |
e0fe0a8d LM |
322 | case ACPI_RESOURCE_TYPE_GPIO: |
323 | ||
324 | total_size = | |
325 | (acpi_rs_length) (total_size + | |
326 | (resource->data.gpio. | |
327 | pin_table_length * 2) + | |
328 | resource->data.gpio. | |
329 | resource_source.string_length + | |
330 | resource->data.gpio. | |
331 | vendor_length); | |
332 | ||
333 | break; | |
334 | ||
335 | case ACPI_RESOURCE_TYPE_SERIAL_BUS: | |
336 | ||
337 | total_size = | |
338 | acpi_gbl_aml_resource_serial_bus_sizes[resource-> | |
339 | data. | |
340 | common_serial_bus. | |
341 | type]; | |
342 | ||
343 | total_size = (acpi_rs_length) (total_size + | |
344 | resource->data. | |
345 | i2c_serial_bus. | |
346 | resource_source. | |
347 | string_length + | |
348 | resource->data. | |
349 | i2c_serial_bus. | |
350 | vendor_length); | |
351 | ||
352 | break; | |
353 | ||
bda663d3 | 354 | default: |
1d1ea1b7 | 355 | |
1da177e4 | 356 | break; |
bda663d3 | 357 | } |
1da177e4 | 358 | |
bda663d3 | 359 | /* Update the total */ |
1da177e4 | 360 | |
0897831b | 361 | aml_size_needed += total_size; |
1da177e4 | 362 | |
bda663d3 | 363 | /* Point to the next object */ |
1da177e4 | 364 | |
96db255c | 365 | resource = |
c51a4de8 | 366 | ACPI_ADD_PTR(struct acpi_resource, resource, |
96db255c | 367 | resource->length); |
bda663d3 | 368 | } |
1da177e4 | 369 | |
96db255c | 370 | /* Did not find an end_tag resource descriptor */ |
1da177e4 | 371 | |
96db255c | 372 | return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG); |
bda663d3 | 373 | } |
1da177e4 | 374 | |
bda663d3 RM |
375 | /******************************************************************************* |
376 | * | |
377 | * FUNCTION: acpi_rs_get_list_length | |
378 | * | |
50eca3eb BM |
379 | * PARAMETERS: aml_buffer - Pointer to the resource byte stream |
380 | * aml_buffer_length - Size of aml_buffer | |
381 | * size_needed - Where the size needed is returned | |
bda663d3 RM |
382 | * |
383 | * RETURN: Status | |
384 | * | |
385 | * DESCRIPTION: Takes an external resource byte stream and calculates the size | |
386 | * buffer needed to hold the corresponding internal resource | |
387 | * descriptor linked list. | |
388 | * | |
389 | ******************************************************************************/ | |
390 | ||
391 | acpi_status | |
50eca3eb BM |
392 | acpi_rs_get_list_length(u8 * aml_buffer, |
393 | u32 aml_buffer_length, acpi_size * size_needed) | |
bda663d3 | 394 | { |
96db255c BM |
395 | acpi_status status; |
396 | u8 *end_aml; | |
bda663d3 | 397 | u8 *buffer; |
ea936b78 | 398 | u32 buffer_size; |
bda663d3 RM |
399 | u16 temp16; |
400 | u16 resource_length; | |
bda663d3 | 401 | u32 extra_struct_bytes; |
96db255c BM |
402 | u8 resource_index; |
403 | u8 minimum_aml_resource_length; | |
e0fe0a8d | 404 | union aml_resource *aml_resource; |
1da177e4 | 405 | |
b229cf92 | 406 | ACPI_FUNCTION_TRACE(rs_get_list_length); |
1da177e4 | 407 | |
e0fe0a8d | 408 | *size_needed = ACPI_RS_SIZE_MIN; /* Minimum size is one end_tag */ |
96db255c | 409 | end_aml = aml_buffer + aml_buffer_length; |
44f6c012 | 410 | |
96db255c | 411 | /* Walk the list of AML resource descriptors */ |
1da177e4 | 412 | |
96db255c | 413 | while (aml_buffer < end_aml) { |
52fc0b02 | 414 | |
96db255c | 415 | /* Validate the Resource Type and Resource Length */ |
1da177e4 | 416 | |
886308ec BM |
417 | status = |
418 | acpi_ut_validate_resource(NULL, aml_buffer, | |
419 | &resource_index); | |
96db255c | 420 | if (ACPI_FAILURE(status)) { |
e0fe0a8d LM |
421 | /* |
422 | * Exit on failure. Cannot continue because the descriptor length | |
423 | * may be bogus also. | |
424 | */ | |
96db255c | 425 | return_ACPI_STATUS(status); |
1da177e4 LT |
426 | } |
427 | ||
e0fe0a8d LM |
428 | aml_resource = (void *)aml_buffer; |
429 | ||
96db255c | 430 | /* Get the resource length and base (minimum) AML size */ |
bda663d3 | 431 | |
0897831b | 432 | resource_length = acpi_ut_get_resource_length(aml_buffer); |
96db255c BM |
433 | minimum_aml_resource_length = |
434 | acpi_gbl_resource_aml_sizes[resource_index]; | |
bda663d3 | 435 | |
96db255c BM |
436 | /* |
437 | * Augment the size for descriptors with optional | |
438 | * and/or variable length fields | |
439 | */ | |
bda663d3 | 440 | extra_struct_bytes = 0; |
96db255c BM |
441 | buffer = |
442 | aml_buffer + acpi_ut_get_resource_header_length(aml_buffer); | |
bda663d3 | 443 | |
96db255c BM |
444 | switch (acpi_ut_get_resource_type(aml_buffer)) { |
445 | case ACPI_RESOURCE_NAME_IRQ: | |
bda663d3 | 446 | /* |
96db255c BM |
447 | * IRQ Resource: |
448 | * Get the number of bits set in the 16-bit IRQ mask | |
bda663d3 | 449 | */ |
96db255c | 450 | ACPI_MOVE_16_TO_16(&temp16, buffer); |
c51a4de8 | 451 | extra_struct_bytes = acpi_rs_count_set_bits(temp16); |
96db255c BM |
452 | break; |
453 | ||
454 | case ACPI_RESOURCE_NAME_DMA: | |
bda663d3 | 455 | /* |
96db255c BM |
456 | * DMA Resource: |
457 | * Get the number of bits set in the 8-bit DMA mask | |
bda663d3 | 458 | */ |
c51a4de8 | 459 | extra_struct_bytes = acpi_rs_count_set_bits(*buffer); |
96db255c BM |
460 | break; |
461 | ||
462 | case ACPI_RESOURCE_NAME_VENDOR_SMALL: | |
ea936b78 | 463 | case ACPI_RESOURCE_NAME_VENDOR_LARGE: |
96db255c BM |
464 | /* |
465 | * Vendor Resource: | |
ea936b78 | 466 | * Get the number of vendor data bytes |
96db255c | 467 | */ |
ea936b78 | 468 | extra_struct_bytes = resource_length; |
bee6dc39 FT |
469 | |
470 | /* | |
471 | * There is already one byte included in the minimum | |
472 | * descriptor size. If there are extra struct bytes, | |
473 | * subtract one from the count. | |
474 | */ | |
475 | if (extra_struct_bytes) { | |
476 | extra_struct_bytes--; | |
477 | } | |
96db255c BM |
478 | break; |
479 | ||
480 | case ACPI_RESOURCE_NAME_END_TAG: | |
481 | /* | |
e0fe0a8d | 482 | * End Tag: This is the normal exit |
96db255c | 483 | */ |
96db255c BM |
484 | return_ACPI_STATUS(AE_OK); |
485 | ||
96db255c BM |
486 | case ACPI_RESOURCE_NAME_ADDRESS32: |
487 | case ACPI_RESOURCE_NAME_ADDRESS16: | |
ea936b78 | 488 | case ACPI_RESOURCE_NAME_ADDRESS64: |
96db255c | 489 | /* |
ea936b78 BM |
490 | * Address Resource: |
491 | * Add the size of the optional resource_source | |
96db255c BM |
492 | */ |
493 | extra_struct_bytes = | |
494 | acpi_rs_stream_option_length(resource_length, | |
495 | minimum_aml_resource_length); | |
496 | break; | |
497 | ||
498 | case ACPI_RESOURCE_NAME_EXTENDED_IRQ: | |
499 | /* | |
ea936b78 BM |
500 | * Extended IRQ Resource: |
501 | * Using the interrupt_table_length, add 4 bytes for each additional | |
502 | * interrupt. Note: at least one interrupt is required and is | |
503 | * included in the minimum descriptor size (reason for the -1) | |
96db255c | 504 | */ |
ea936b78 BM |
505 | extra_struct_bytes = (buffer[1] - 1) * sizeof(u32); |
506 | ||
507 | /* Add the size of the optional resource_source */ | |
508 | ||
509 | extra_struct_bytes += | |
96db255c BM |
510 | acpi_rs_stream_option_length(resource_length - |
511 | extra_struct_bytes, | |
512 | minimum_aml_resource_length); | |
513 | break; | |
514 | ||
e0fe0a8d LM |
515 | case ACPI_RESOURCE_NAME_GPIO: |
516 | ||
517 | /* Vendor data is optional */ | |
518 | ||
519 | if (aml_resource->gpio.vendor_length) { | |
520 | extra_struct_bytes += | |
521 | aml_resource->gpio.vendor_offset - | |
522 | aml_resource->gpio.pin_table_offset + | |
523 | aml_resource->gpio.vendor_length; | |
524 | } else { | |
525 | extra_struct_bytes += | |
526 | aml_resource->large_header.resource_length + | |
527 | sizeof(struct aml_resource_large_header) - | |
528 | aml_resource->gpio.pin_table_offset; | |
529 | } | |
530 | break; | |
531 | ||
532 | case ACPI_RESOURCE_NAME_SERIAL_BUS: | |
533 | ||
534 | minimum_aml_resource_length = | |
535 | acpi_gbl_resource_aml_serial_bus_sizes | |
536 | [aml_resource->common_serial_bus.type]; | |
537 | extra_struct_bytes += | |
538 | aml_resource->common_serial_bus.resource_length - | |
539 | minimum_aml_resource_length; | |
540 | break; | |
541 | ||
96db255c | 542 | default: |
1d1ea1b7 | 543 | |
96db255c | 544 | break; |
bda663d3 | 545 | } |
44f6c012 | 546 | |
ea936b78 BM |
547 | /* |
548 | * Update the required buffer size for the internal descriptor structs | |
549 | * | |
550 | * Important: Round the size up for the appropriate alignment. This | |
551 | * is a requirement on IA64. | |
552 | */ | |
e0fe0a8d LM |
553 | if (acpi_ut_get_resource_type(aml_buffer) == |
554 | ACPI_RESOURCE_NAME_SERIAL_BUS) { | |
555 | buffer_size = | |
556 | acpi_gbl_resource_struct_serial_bus_sizes | |
557 | [aml_resource->common_serial_bus.type] + | |
558 | extra_struct_bytes; | |
559 | } else { | |
560 | buffer_size = | |
561 | acpi_gbl_resource_struct_sizes[resource_index] + | |
562 | extra_struct_bytes; | |
563 | } | |
564 | buffer_size = (u32)ACPI_ROUND_UP_TO_NATIVE_WORD(buffer_size); | |
ea936b78 BM |
565 | |
566 | *size_needed += buffer_size; | |
1da177e4 | 567 | |
ea936b78 | 568 | ACPI_DEBUG_PRINT((ACPI_DB_RESOURCES, |
b229cf92 | 569 | "Type %.2X, AmlLength %.2X InternalLength %.2X\n", |
ea936b78 BM |
570 | acpi_ut_get_resource_type(aml_buffer), |
571 | acpi_ut_get_descriptor_length(aml_buffer), | |
572 | buffer_size)); | |
44f6c012 | 573 | |
bda663d3 | 574 | /* |
ea936b78 BM |
575 | * Point to the next resource within the AML stream using the length |
576 | * contained in the resource descriptor header | |
bda663d3 | 577 | */ |
96db255c | 578 | aml_buffer += acpi_ut_get_descriptor_length(aml_buffer); |
1da177e4 LT |
579 | } |
580 | ||
96db255c | 581 | /* Did not find an end_tag resource descriptor */ |
44f6c012 | 582 | |
96db255c | 583 | return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG); |
1da177e4 LT |
584 | } |
585 | ||
1da177e4 LT |
586 | /******************************************************************************* |
587 | * | |
588 | * FUNCTION: acpi_rs_get_pci_routing_table_length | |
589 | * | |
590 | * PARAMETERS: package_object - Pointer to the package object | |
591 | * buffer_size_needed - u32 pointer of the size buffer | |
592 | * needed to properly return the | |
593 | * parsed data | |
594 | * | |
595 | * RETURN: Status | |
596 | * | |
597 | * DESCRIPTION: Given a package representing a PCI routing table, this | |
598 | * calculates the size of the corresponding linked list of | |
599 | * descriptions. | |
600 | * | |
601 | ******************************************************************************/ | |
602 | ||
603 | acpi_status | |
4be44fcd LB |
604 | acpi_rs_get_pci_routing_table_length(union acpi_operand_object *package_object, |
605 | acpi_size * buffer_size_needed) | |
1da177e4 | 606 | { |
4be44fcd LB |
607 | u32 number_of_elements; |
608 | acpi_size temp_size_needed = 0; | |
609 | union acpi_operand_object **top_object_list; | |
610 | u32 index; | |
611 | union acpi_operand_object *package_element; | |
612 | union acpi_operand_object **sub_object_list; | |
613 | u8 name_found; | |
614 | u32 table_index; | |
1da177e4 | 615 | |
b229cf92 | 616 | ACPI_FUNCTION_TRACE(rs_get_pci_routing_table_length); |
1da177e4 LT |
617 | |
618 | number_of_elements = package_object->package.count; | |
619 | ||
620 | /* | |
621 | * Calculate the size of the return buffer. | |
622 | * The base size is the number of elements * the sizes of the | |
73a3090a | 623 | * structures. Additional space for the strings is added below. |
1da177e4 LT |
624 | * The minus one is to subtract the size of the u8 Source[1] |
625 | * member because it is added below. | |
626 | * | |
627 | * But each PRT_ENTRY structure has a pointer to a string and | |
628 | * the size of that string must be found. | |
629 | */ | |
630 | top_object_list = package_object->package.elements; | |
631 | ||
632 | for (index = 0; index < number_of_elements; index++) { | |
52fc0b02 | 633 | |
44f6c012 RM |
634 | /* Dereference the sub-package */ |
635 | ||
1da177e4 LT |
636 | package_element = *top_object_list; |
637 | ||
53951bd5 RM |
638 | /* We must have a valid Package object */ |
639 | ||
640 | if (!package_element || | |
641 | (package_element->common.type != ACPI_TYPE_PACKAGE)) { | |
474caffd | 642 | return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
53951bd5 RM |
643 | } |
644 | ||
1da177e4 LT |
645 | /* |
646 | * The sub_object_list will now point to an array of the | |
647 | * four IRQ elements: Address, Pin, Source and source_index | |
648 | */ | |
649 | sub_object_list = package_element->package.elements; | |
650 | ||
44f6c012 RM |
651 | /* Scan the irq_table_elements for the Source Name String */ |
652 | ||
1da177e4 LT |
653 | name_found = FALSE; |
654 | ||
aa6329c4 LZ |
655 | for (table_index = 0; |
656 | table_index < package_element->package.count | |
657 | && !name_found; table_index++) { | |
b8e4d893 BM |
658 | if (*sub_object_list && /* Null object allowed */ |
659 | ((ACPI_TYPE_STRING == | |
3371c19c | 660 | (*sub_object_list)->common.type) || |
b8e4d893 | 661 | ((ACPI_TYPE_LOCAL_REFERENCE == |
3371c19c | 662 | (*sub_object_list)->common.type) && |
1044f1f6 BM |
663 | ((*sub_object_list)->reference.class == |
664 | ACPI_REFCLASS_NAME)))) { | |
1da177e4 | 665 | name_found = TRUE; |
4be44fcd | 666 | } else { |
44f6c012 RM |
667 | /* Look at the next element */ |
668 | ||
1da177e4 LT |
669 | sub_object_list++; |
670 | } | |
671 | } | |
672 | ||
4be44fcd | 673 | temp_size_needed += (sizeof(struct acpi_pci_routing_table) - 4); |
1da177e4 | 674 | |
44f6c012 RM |
675 | /* Was a String type found? */ |
676 | ||
1da177e4 | 677 | if (name_found) { |
3371c19c | 678 | if ((*sub_object_list)->common.type == ACPI_TYPE_STRING) { |
1da177e4 LT |
679 | /* |
680 | * The length String.Length field does not include the | |
681 | * terminating NULL, add 1 | |
682 | */ | |
44f6c012 | 683 | temp_size_needed += ((acpi_size) |
4be44fcd LB |
684 | (*sub_object_list)->string. |
685 | length + 1); | |
686 | } else { | |
1f86e8c1 | 687 | temp_size_needed += acpi_ns_get_pathname_length((*sub_object_list)->reference.node); |
1da177e4 | 688 | } |
4be44fcd | 689 | } else { |
1da177e4 LT |
690 | /* |
691 | * If no name was found, then this is a NULL, which is | |
692 | * translated as a u32 zero. | |
693 | */ | |
4be44fcd | 694 | temp_size_needed += sizeof(u32); |
1da177e4 LT |
695 | } |
696 | ||
697 | /* Round up the size since each element must be aligned */ | |
698 | ||
958dd242 | 699 | temp_size_needed = ACPI_ROUND_UP_TO_64BIT(temp_size_needed); |
1da177e4 | 700 | |
44f6c012 RM |
701 | /* Point to the next union acpi_operand_object */ |
702 | ||
1da177e4 LT |
703 | top_object_list++; |
704 | } | |
705 | ||
706 | /* | |
ea936b78 | 707 | * Add an extra element to the end of the list, essentially a |
44f6c012 | 708 | * NULL terminator |
1da177e4 | 709 | */ |
4be44fcd LB |
710 | *buffer_size_needed = |
711 | temp_size_needed + sizeof(struct acpi_pci_routing_table); | |
712 | return_ACPI_STATUS(AE_OK); | |
1da177e4 | 713 | } |