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-rw-r--r--drivers/acpi/resources/rscalc.c831
1 files changed, 306 insertions, 525 deletions
diff --git a/drivers/acpi/resources/rscalc.c b/drivers/acpi/resources/rscalc.c
index 378f58390fc1..7d6481d9fbec 100644
--- a/drivers/acpi/resources/rscalc.c
+++ b/drivers/acpi/resources/rscalc.c
@@ -5,7 +5,7 @@
5 ******************************************************************************/ 5 ******************************************************************************/
6 6
7/* 7/*
8 * Copyright (C) 2000 - 2005, R. Byron Moore 8 * Copyright (C) 2000 - 2006, R. Byron Moore
9 * All rights reserved. 9 * All rights reserved.
10 * 10 *
11 * Redistribution and use in source and binary forms, with or without 11 * Redistribution and use in source and binary forms, with or without
@@ -49,652 +49,433 @@
49#define _COMPONENT ACPI_RESOURCES 49#define _COMPONENT ACPI_RESOURCES
50ACPI_MODULE_NAME("rscalc") 50ACPI_MODULE_NAME("rscalc")
51 51
52/* Local prototypes */
53static u8 acpi_rs_count_set_bits(u16 bit_field);
54
55static acpi_rs_length
56acpi_rs_struct_option_length(struct acpi_resource_source *resource_source);
57
58static u32
59acpi_rs_stream_option_length(u32 resource_length, u32 minimum_total_length);
60
52/******************************************************************************* 61/*******************************************************************************
53 * 62 *
54 * FUNCTION: acpi_rs_get_byte_stream_length 63 * FUNCTION: acpi_rs_count_set_bits
55 * 64 *
56 * PARAMETERS: linked_list - Pointer to the resource linked list 65 * PARAMETERS: bit_field - Field in which to count bits
57 * size_needed - u32 pointer of the size buffer needed
58 * to properly return the parsed data
59 * 66 *
60 * RETURN: Status 67 * RETURN: Number of bits set within the field
61 * 68 *
62 * DESCRIPTION: Takes the resource byte stream and parses it once, calculating 69 * DESCRIPTION: Count the number of bits set in a resource field. Used for
63 * the size buffer needed to hold the linked list that conveys 70 * (Short descriptor) interrupt and DMA lists.
64 * the resource data.
65 * 71 *
66 ******************************************************************************/ 72 ******************************************************************************/
67acpi_status
68acpi_rs_get_byte_stream_length(struct acpi_resource *linked_list,
69 acpi_size * size_needed)
70{
71 acpi_size byte_stream_size_needed = 0;
72 acpi_size segment_size;
73 u8 done = FALSE;
74
75 ACPI_FUNCTION_TRACE("rs_get_byte_stream_length");
76
77 while (!done) {
78 /* Init the variable that will hold the size to add to the total. */
79
80 segment_size = 0;
81
82 switch (linked_list->id) {
83 case ACPI_RSTYPE_IRQ:
84 /*
85 * IRQ Resource
86 * For an IRQ Resource, Byte 3, although optional, will always be
87 * created - it holds IRQ information.
88 */
89 segment_size = 4;
90 break;
91
92 case ACPI_RSTYPE_DMA:
93 /*
94 * DMA Resource
95 * For this resource the size is static
96 */
97 segment_size = 3;
98 break;
99
100 case ACPI_RSTYPE_START_DPF:
101 /*
102 * Start Dependent Functions Resource
103 * For a start_dependent_functions Resource, Byte 1, although
104 * optional, will always be created.
105 */
106 segment_size = 2;
107 break;
108
109 case ACPI_RSTYPE_END_DPF:
110 /*
111 * End Dependent Functions Resource
112 * For this resource the size is static
113 */
114 segment_size = 1;
115 break;
116
117 case ACPI_RSTYPE_IO:
118 /*
119 * IO Port Resource
120 * For this resource the size is static
121 */
122 segment_size = 8;
123 break;
124 73
125 case ACPI_RSTYPE_FIXED_IO: 74static u8 acpi_rs_count_set_bits(u16 bit_field)
126 /* 75{
127 * Fixed IO Port Resource 76 u8 bits_set;
128 * For this resource the size is static
129 */
130 segment_size = 4;
131 break;
132
133 case ACPI_RSTYPE_VENDOR:
134 /*
135 * Vendor Defined Resource
136 * For a Vendor Specific resource, if the Length is between 1 and 7
137 * it will be created as a Small Resource data type, otherwise it
138 * is a Large Resource data type.
139 */
140 if (linked_list->data.vendor_specific.length > 7) {
141 segment_size = 3;
142 } else {
143 segment_size = 1;
144 }
145 segment_size +=
146 linked_list->data.vendor_specific.length;
147 break;
148
149 case ACPI_RSTYPE_END_TAG:
150 /*
151 * End Tag
152 * For this resource the size is static
153 */
154 segment_size = 2;
155 done = TRUE;
156 break;
157
158 case ACPI_RSTYPE_MEM24:
159 /*
160 * 24-Bit Memory Resource
161 * For this resource the size is static
162 */
163 segment_size = 12;
164 break;
165 77
166 case ACPI_RSTYPE_MEM32: 78 ACPI_FUNCTION_ENTRY();
167 /*
168 * 32-Bit Memory Range Resource
169 * For this resource the size is static
170 */
171 segment_size = 20;
172 break;
173 79
174 case ACPI_RSTYPE_FIXED_MEM32: 80 for (bits_set = 0; bit_field; bits_set++) {
175 /* 81 /* Zero the least significant bit that is set */
176 * 32-Bit Fixed Memory Resource
177 * For this resource the size is static
178 */
179 segment_size = 12;
180 break;
181 82
182 case ACPI_RSTYPE_ADDRESS16: 83 bit_field &= (bit_field - 1);
183 /* 84 }
184 * 16-Bit Address Resource
185 * The base size of this byte stream is 16. If a Resource Source
186 * string is not NULL, add 1 for the Index + the length of the null
187 * terminated string Resource Source + 1 for the null.
188 */
189 segment_size = 16;
190
191 if (linked_list->data.address16.resource_source.
192 string_ptr) {
193 segment_size +=
194 linked_list->data.address16.resource_source.
195 string_length;
196 segment_size++;
197 }
198 break;
199 85
200 case ACPI_RSTYPE_ADDRESS32: 86 return (bits_set);
201 /* 87}
202 * 32-Bit Address Resource
203 * The base size of this byte stream is 26. If a Resource
204 * Source string is not NULL, add 1 for the Index + the
205 * length of the null terminated string Resource Source +
206 * 1 for the null.
207 */
208 segment_size = 26;
209
210 if (linked_list->data.address32.resource_source.
211 string_ptr) {
212 segment_size +=
213 linked_list->data.address32.resource_source.
214 string_length;
215 segment_size++;
216 }
217 break;
218 88
219 case ACPI_RSTYPE_ADDRESS64: 89/*******************************************************************************
220 /* 90 *
221 * 64-Bit Address Resource 91 * FUNCTION: acpi_rs_struct_option_length
222 * The base size of this byte stream is 46. If a resource_source 92 *
223 * string is not NULL, add 1 for the Index + the length of the null 93 * PARAMETERS: resource_source - Pointer to optional descriptor field
224 * terminated string Resource Source + 1 for the null. 94 *
225 */ 95 * RETURN: Status
226 segment_size = 46; 96 *
227 97 * DESCRIPTION: Common code to handle optional resource_source_index and
228 if (linked_list->data.address64.resource_source. 98 * resource_source fields in some Large descriptors. Used during
229 string_ptr) { 99 * list-to-stream conversion
230 segment_size += 100 *
231 linked_list->data.address64.resource_source. 101 ******************************************************************************/
232 string_length;
233 segment_size++;
234 }
235 break;
236 102
237 case ACPI_RSTYPE_EXT_IRQ: 103static acpi_rs_length
238 /* 104acpi_rs_struct_option_length(struct acpi_resource_source *resource_source)
239 * Extended IRQ Resource 105{
240 * The base size of this byte stream is 9. This is for an Interrupt 106 ACPI_FUNCTION_ENTRY();
241 * table length of 1. For each additional interrupt, add 4.
242 * If a Resource Source string is not NULL, add 1 for the
243 * Index + the length of the null terminated string
244 * Resource Source + 1 for the null.
245 */
246 segment_size = 9 + (((acpi_size)
247 linked_list->data.extended_irq.
248 number_of_interrupts - 1) * 4);
249
250 if (linked_list->data.extended_irq.resource_source.
251 string_ptr) {
252 segment_size +=
253 linked_list->data.extended_irq.
254 resource_source.string_length;
255 segment_size++;
256 }
257 break;
258 107
259 default: 108 /*
109 * If the resource_source string is valid, return the size of the string
110 * (string_length includes the NULL terminator) plus the size of the
111 * resource_source_index (1).
112 */
113 if (resource_source->string_ptr) {
114 return ((acpi_rs_length) (resource_source->string_length + 1));
115 }
260 116
261 /* If we get here, everything is out of sync, exit with error */ 117 return (0);
118}
262 119
263 return_ACPI_STATUS(AE_AML_INVALID_RESOURCE_TYPE); 120/*******************************************************************************
121 *
122 * FUNCTION: acpi_rs_stream_option_length
123 *
124 * PARAMETERS: resource_length - Length from the resource header
125 * minimum_total_length - Minimum length of this resource, before
126 * any optional fields. Includes header size
127 *
128 * RETURN: Length of optional string (0 if no string present)
129 *
130 * DESCRIPTION: Common code to handle optional resource_source_index and
131 * resource_source fields in some Large descriptors. Used during
132 * stream-to-list conversion
133 *
134 ******************************************************************************/
264 135
265 } /* switch (linked_list->Id) */ 136static u32
137acpi_rs_stream_option_length(u32 resource_length,
138 u32 minimum_aml_resource_length)
139{
140 u32 string_length = 0;
266 141
267 /* Update the total */ 142 ACPI_FUNCTION_ENTRY();
268 143
269 byte_stream_size_needed += segment_size; 144 /*
145 * The resource_source_index and resource_source are optional elements of some
146 * Large-type resource descriptors.
147 */
270 148
271 /* Point to the next object */ 149 /*
150 * If the length of the actual resource descriptor is greater than the ACPI
151 * spec-defined minimum length, it means that a resource_source_index exists
152 * and is followed by a (required) null terminated string. The string length
153 * (including the null terminator) is the resource length minus the minimum
154 * length, minus one byte for the resource_source_index itself.
155 */
156 if (resource_length > minimum_aml_resource_length) {
157 /* Compute the length of the optional string */
272 158
273 linked_list = ACPI_PTR_ADD(struct acpi_resource, 159 string_length =
274 linked_list, linked_list->length); 160 resource_length - minimum_aml_resource_length - 1;
275 } 161 }
276 162
277 /* This is the data the caller needs */ 163 /* Round up length to 32 bits for internal structure alignment */
278 164
279 *size_needed = byte_stream_size_needed; 165 return (ACPI_ROUND_UP_to_32_bITS(string_length));
280 return_ACPI_STATUS(AE_OK);
281} 166}
282 167
283/******************************************************************************* 168/*******************************************************************************
284 * 169 *
285 * FUNCTION: acpi_rs_get_list_length 170 * FUNCTION: acpi_rs_get_aml_length
286 * 171 *
287 * PARAMETERS: byte_stream_buffer - Pointer to the resource byte stream 172 * PARAMETERS: Resource - Pointer to the resource linked list
288 * byte_stream_buffer_length - Size of byte_stream_buffer 173 * size_needed - Where the required size is returned
289 * size_needed - u32 pointer of the size buffer
290 * needed to properly return the
291 * parsed data
292 * 174 *
293 * RETURN: Status 175 * RETURN: Status
294 * 176 *
295 * DESCRIPTION: Takes the resource byte stream and parses it once, calculating 177 * DESCRIPTION: Takes a linked list of internal resource descriptors and
296 * the size buffer needed to hold the linked list that conveys 178 * calculates the size buffer needed to hold the corresponding
297 * the resource data. 179 * external resource byte stream.
298 * 180 *
299 ******************************************************************************/ 181 ******************************************************************************/
300 182
301acpi_status 183acpi_status
302acpi_rs_get_list_length(u8 * byte_stream_buffer, 184acpi_rs_get_aml_length(struct acpi_resource * resource, acpi_size * size_needed)
303 u32 byte_stream_buffer_length, acpi_size * size_needed)
304{ 185{
305 u32 buffer_size = 0; 186 acpi_size aml_size_needed = 0;
306 u32 bytes_parsed = 0; 187 acpi_rs_length total_size;
307 u8 number_of_interrupts = 0;
308 u8 number_of_channels = 0;
309 u8 resource_type;
310 u32 structure_size;
311 u32 bytes_consumed;
312 u8 *buffer;
313 u8 temp8;
314 u16 temp16;
315 u8 index;
316 u8 additional_bytes;
317
318 ACPI_FUNCTION_TRACE("rs_get_list_length");
319 188
320 while (bytes_parsed < byte_stream_buffer_length) { 189 ACPI_FUNCTION_TRACE("rs_get_aml_length");
321 /* The next byte in the stream is the resource type */
322 190
323 resource_type = acpi_rs_get_resource_type(*byte_stream_buffer); 191 /* Traverse entire list of internal resource descriptors */
324 192
325 switch (resource_type) { 193 while (resource) {
326 case ACPI_RDESC_TYPE_MEMORY_24: 194 /* Validate the descriptor type */
327 /*
328 * 24-Bit Memory Resource
329 */
330 bytes_consumed = 12;
331
332 structure_size =
333 ACPI_SIZEOF_RESOURCE(struct acpi_resource_mem24);
334 break;
335 195
336 case ACPI_RDESC_TYPE_LARGE_VENDOR: 196 if (resource->type > ACPI_RESOURCE_TYPE_MAX) {
337 /* 197 return_ACPI_STATUS(AE_AML_INVALID_RESOURCE_TYPE);
338 * Vendor Defined Resource 198 }
339 */
340 buffer = byte_stream_buffer;
341 ++buffer;
342
343 ACPI_MOVE_16_TO_16(&temp16, buffer);
344 bytes_consumed = temp16 + 3;
345
346 /* Ensure a 32-bit boundary for the structure */
347 199
348 temp16 = (u16) ACPI_ROUND_UP_to_32_bITS(temp16); 200 /* Get the base size of the (external stream) resource descriptor */
349 201
350 structure_size = 202 total_size = acpi_gbl_aml_resource_sizes[resource->type];
351 ACPI_SIZEOF_RESOURCE(struct acpi_resource_vendor) +
352 (temp16 * sizeof(u8));
353 break;
354 203
355 case ACPI_RDESC_TYPE_MEMORY_32: 204 /*
205 * Augment the base size for descriptors with optional and/or
206 * variable-length fields
207 */
208 switch (resource->type) {
209 case ACPI_RESOURCE_TYPE_VENDOR:
356 /* 210 /*
357 * 32-Bit Memory Range Resource 211 * Vendor Defined Resource:
212 * For a Vendor Specific resource, if the Length is between 1 and 7
213 * it will be created as a Small Resource data type, otherwise it
214 * is a Large Resource data type.
358 */ 215 */
359 bytes_consumed = 20; 216 if (resource->data.vendor.byte_length > 7) {
217 /* Base size of a Large resource descriptor */
360 218
361 structure_size = 219 total_size =
362 ACPI_SIZEOF_RESOURCE(struct acpi_resource_mem32); 220 sizeof(struct aml_resource_large_header);
363 break; 221 }
364 222
365 case ACPI_RDESC_TYPE_FIXED_MEMORY_32: 223 /* Add the size of the vendor-specific data */
366 /*
367 * 32-Bit Fixed Memory Resource
368 */
369 bytes_consumed = 12;
370 224
371 structure_size = 225 total_size = (acpi_rs_length)
372 ACPI_SIZEOF_RESOURCE(struct 226 (total_size + resource->data.vendor.byte_length);
373 acpi_resource_fixed_mem32);
374 break; 227 break;
375 228
376 case ACPI_RDESC_TYPE_EXTENDED_ADDRESS_SPACE: 229 case ACPI_RESOURCE_TYPE_END_TAG:
377 /* 230 /*
378 * 64-Bit Address Resource 231 * End Tag:
232 * We are done -- return the accumulated total size.
379 */ 233 */
380 buffer = byte_stream_buffer; 234 *size_needed = aml_size_needed + total_size;
381 235
382 ++buffer; 236 /* Normal exit */
383 ACPI_MOVE_16_TO_16(&temp16, buffer);
384 237
385 bytes_consumed = temp16 + 3; 238 return_ACPI_STATUS(AE_OK);
386 structure_size =
387 ACPI_SIZEOF_RESOURCE(struct
388 acpi_resource_address64);
389 break;
390 239
391 case ACPI_RDESC_TYPE_QWORD_ADDRESS_SPACE: 240 case ACPI_RESOURCE_TYPE_ADDRESS16:
392 /* 241 /*
393 * 64-Bit Address Resource 242 * 16-Bit Address Resource:
243 * Add the size of the optional resource_source info
394 */ 244 */
395 buffer = byte_stream_buffer; 245 total_size = (acpi_rs_length)
396 246 (total_size +
397 ++buffer; 247 acpi_rs_struct_option_length(&resource->data.
398 ACPI_MOVE_16_TO_16(&temp16, buffer); 248 address16.
399 249 resource_source));
400 bytes_consumed = temp16 + 3; 250 break;
401 251
252 case ACPI_RESOURCE_TYPE_ADDRESS32:
402 /* 253 /*
403 * Resource Source Index and Resource Source are optional elements. 254 * 32-Bit Address Resource:
404 * Check the length of the Bytestream. If it is greater than 43, 255 * Add the size of the optional resource_source info
405 * that means that an Index exists and is followed by a null
406 * terminated string. Therefore, set the temp variable to the
407 * length minus the minimum byte stream length plus the byte for
408 * the Index to determine the size of the NULL terminated string.
409 */ 256 */
410 if (43 < temp16) { 257 total_size = (acpi_rs_length)
411 temp8 = (u8) (temp16 - 44); 258 (total_size +
412 } else { 259 acpi_rs_struct_option_length(&resource->data.
413 temp8 = 0; 260 address32.
414 } 261 resource_source));
415
416 /* Ensure a 64-bit boundary for the structure */
417
418 temp8 = (u8) ACPI_ROUND_UP_to_64_bITS(temp8);
419
420 structure_size =
421 ACPI_SIZEOF_RESOURCE(struct acpi_resource_address64)
422 + (temp8 * sizeof(u8));
423 break; 262 break;
424 263
425 case ACPI_RDESC_TYPE_DWORD_ADDRESS_SPACE: 264 case ACPI_RESOURCE_TYPE_ADDRESS64:
426 /* 265 /*
427 * 32-Bit Address Resource 266 * 64-Bit Address Resource:
267 * Add the size of the optional resource_source info
428 */ 268 */
429 buffer = byte_stream_buffer; 269 total_size = (acpi_rs_length)
430 270 (total_size +
431 ++buffer; 271 acpi_rs_struct_option_length(&resource->data.
432 ACPI_MOVE_16_TO_16(&temp16, buffer); 272 address64.
433 273 resource_source));
434 bytes_consumed = temp16 + 3; 274 break;
435 275
276 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
436 /* 277 /*
437 * Resource Source Index and Resource Source are optional elements. 278 * Extended IRQ Resource:
438 * Check the length of the Bytestream. If it is greater than 23, 279 * Add the size of each additional optional interrupt beyond the
439 * that means that an Index exists and is followed by a null 280 * required 1 (4 bytes for each u32 interrupt number)
440 * terminated string. Therefore, set the temp variable to the
441 * length minus the minimum byte stream length plus the byte for
442 * the Index to determine the size of the NULL terminated string.
443 */ 281 */
444 if (23 < temp16) { 282 total_size = (acpi_rs_length)
445 temp8 = (u8) (temp16 - 24); 283 (total_size +
446 } else { 284 ((resource->data.extended_irq.interrupt_count -
447 temp8 = 0; 285 1) * 4) +
448 } 286 /* Add the size of the optional resource_source info */
449 287 acpi_rs_struct_option_length(&resource->data.
450 /* Ensure a 32-bit boundary for the structure */ 288 extended_irq.
451 289 resource_source));
452 temp8 = (u8) ACPI_ROUND_UP_to_32_bITS(temp8); 290 break;
453 291
454 structure_size = 292 default:
455 ACPI_SIZEOF_RESOURCE(struct acpi_resource_address32)
456 + (temp8 * sizeof(u8));
457 break; 293 break;
294 }
458 295
459 case ACPI_RDESC_TYPE_WORD_ADDRESS_SPACE: 296 /* Update the total */
460 /*
461 * 16-Bit Address Resource
462 */
463 buffer = byte_stream_buffer;
464 297
465 ++buffer; 298 aml_size_needed += total_size;
466 ACPI_MOVE_16_TO_16(&temp16, buffer);
467 299
468 bytes_consumed = temp16 + 3; 300 /* Point to the next object */
469 301
470 /* 302 resource =
471 * Resource Source Index and Resource Source are optional elements. 303 ACPI_ADD_PTR(struct acpi_resource, resource,
472 * Check the length of the Bytestream. If it is greater than 13, 304 resource->length);
473 * that means that an Index exists and is followed by a null 305 }
474 * terminated string. Therefore, set the temp variable to the
475 * length minus the minimum byte stream length plus the byte for
476 * the Index to determine the size of the NULL terminated string.
477 */
478 if (13 < temp16) {
479 temp8 = (u8) (temp16 - 14);
480 } else {
481 temp8 = 0;
482 }
483 306
484 /* Ensure a 32-bit boundary for the structure */ 307 /* Did not find an end_tag resource descriptor */
485 308
486 temp8 = (u8) ACPI_ROUND_UP_to_32_bITS(temp8); 309 return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG);
310}
487 311
488 structure_size = 312/*******************************************************************************
489 ACPI_SIZEOF_RESOURCE(struct acpi_resource_address16) 313 *
490 + (temp8 * sizeof(u8)); 314 * FUNCTION: acpi_rs_get_list_length
491 break; 315 *
316 * PARAMETERS: aml_buffer - Pointer to the resource byte stream
317 * aml_buffer_length - Size of aml_buffer
318 * size_needed - Where the size needed is returned
319 *
320 * RETURN: Status
321 *
322 * DESCRIPTION: Takes an external resource byte stream and calculates the size
323 * buffer needed to hold the corresponding internal resource
324 * descriptor linked list.
325 *
326 ******************************************************************************/
492 327
493 case ACPI_RDESC_TYPE_EXTENDED_XRUPT: 328acpi_status
494 /* 329acpi_rs_get_list_length(u8 * aml_buffer,
495 * Extended IRQ 330 u32 aml_buffer_length, acpi_size * size_needed)
496 */ 331{
497 buffer = byte_stream_buffer; 332 acpi_status status;
333 u8 *end_aml;
334 u8 *buffer;
335 u32 buffer_size = 0;
336 u16 temp16;
337 u16 resource_length;
338 u32 extra_struct_bytes;
339 u8 resource_index;
340 u8 minimum_aml_resource_length;
498 341
499 ++buffer; 342 ACPI_FUNCTION_TRACE("rs_get_list_length");
500 ACPI_MOVE_16_TO_16(&temp16, buffer);
501 343
502 bytes_consumed = temp16 + 3; 344 end_aml = aml_buffer + aml_buffer_length;
503 345
504 /* 346 /* Walk the list of AML resource descriptors */
505 * Point past the length field and the Interrupt vector flags to
506 * save off the Interrupt table length to the Temp8 variable.
507 */
508 buffer += 3;
509 temp8 = *buffer;
510 347
511 /* 348 while (aml_buffer < end_aml) {
512 * To compensate for multiple interrupt numbers, add 4 bytes for 349 /* Validate the Resource Type and Resource Length */
513 * each additional interrupts greater than 1
514 */
515 additional_bytes = (u8) ((temp8 - 1) * 4);
516 350
517 /* 351 status = acpi_ut_validate_resource(aml_buffer, &resource_index);
518 * Resource Source Index and Resource Source are optional elements. 352 if (ACPI_FAILURE(status)) {
519 * Check the length of the Bytestream. If it is greater than 9, 353 return_ACPI_STATUS(status);
520 * that means that an Index exists and is followed by a null 354 }
521 * terminated string. Therefore, set the temp variable to the
522 * length minus the minimum byte stream length plus the byte for
523 * the Index to determine the size of the NULL terminated string.
524 */
525 if (9 + additional_bytes < temp16) {
526 temp8 = (u8) (temp16 - (9 + additional_bytes));
527 } else {
528 temp8 = 0;
529 }
530 355
531 /* Ensure a 32-bit boundary for the structure */ 356 /* Get the resource length and base (minimum) AML size */
532 357
533 temp8 = (u8) ACPI_ROUND_UP_to_32_bITS(temp8); 358 resource_length = acpi_ut_get_resource_length(aml_buffer);
359 minimum_aml_resource_length =
360 acpi_gbl_resource_aml_sizes[resource_index];
534 361
535 structure_size = 362 /*
536 ACPI_SIZEOF_RESOURCE(struct acpi_resource_ext_irq) + 363 * Augment the size for descriptors with optional
537 (additional_bytes * sizeof(u8)) + 364 * and/or variable length fields
538 (temp8 * sizeof(u8)); 365 */
539 break; 366 extra_struct_bytes = 0;
367 buffer =
368 aml_buffer + acpi_ut_get_resource_header_length(aml_buffer);
540 369
541 case ACPI_RDESC_TYPE_IRQ_FORMAT: 370 switch (acpi_ut_get_resource_type(aml_buffer)) {
371 case ACPI_RESOURCE_NAME_IRQ:
542 /* 372 /*
543 * IRQ Resource. 373 * IRQ Resource:
544 * Determine if it there are two or three trailing bytes 374 * Get the number of bits set in the 16-bit IRQ mask
545 */ 375 */
546 buffer = byte_stream_buffer;
547 temp8 = *buffer;
548
549 if (temp8 & 0x01) {
550 bytes_consumed = 4;
551 } else {
552 bytes_consumed = 3;
553 }
554
555 /* Point past the descriptor */
556
557 ++buffer;
558
559 /* Look at the number of bits set */
560
561 ACPI_MOVE_16_TO_16(&temp16, buffer); 376 ACPI_MOVE_16_TO_16(&temp16, buffer);
562 377 extra_struct_bytes = acpi_rs_count_set_bits(temp16);
563 for (index = 0; index < 16; index++) {
564 if (temp16 & 0x1) {
565 ++number_of_interrupts;
566 }
567
568 temp16 >>= 1;
569 }
570
571 structure_size =
572 ACPI_SIZEOF_RESOURCE(struct acpi_resource_io) +
573 (number_of_interrupts * sizeof(u32));
574 break; 378 break;
575 379
576 case ACPI_RDESC_TYPE_DMA_FORMAT: 380 case ACPI_RESOURCE_NAME_DMA:
577 /* 381 /*
578 * DMA Resource 382 * DMA Resource:
383 * Get the number of bits set in the 8-bit DMA mask
579 */ 384 */
580 buffer = byte_stream_buffer; 385 extra_struct_bytes = acpi_rs_count_set_bits(*buffer);
581 bytes_consumed = 3;
582
583 /* Point past the descriptor */
584
585 ++buffer;
586
587 /* Look at the number of bits set */
588
589 temp8 = *buffer;
590
591 for (index = 0; index < 8; index++) {
592 if (temp8 & 0x1) {
593 ++number_of_channels;
594 }
595
596 temp8 >>= 1;
597 }
598
599 structure_size =
600 ACPI_SIZEOF_RESOURCE(struct acpi_resource_dma) +
601 (number_of_channels * sizeof(u32));
602 break; 386 break;
603 387
604 case ACPI_RDESC_TYPE_START_DEPENDENT: 388 case ACPI_RESOURCE_NAME_VENDOR_SMALL:
605 /* 389 /*
606 * Start Dependent Functions Resource 390 * Vendor Resource:
607 * Determine if it there are two or three trailing bytes 391 * Ensure a 32-bit boundary for the structure
608 */ 392 */
609 buffer = byte_stream_buffer; 393 extra_struct_bytes =
610 temp8 = *buffer; 394 ACPI_ROUND_UP_to_32_bITS(resource_length) -
611 395 resource_length;
612 if (temp8 & 0x01) {
613 bytes_consumed = 2;
614 } else {
615 bytes_consumed = 1;
616 }
617
618 structure_size =
619 ACPI_SIZEOF_RESOURCE(struct
620 acpi_resource_start_dpf);
621 break; 396 break;
622 397
623 case ACPI_RDESC_TYPE_END_DEPENDENT: 398 case ACPI_RESOURCE_NAME_END_TAG:
624 /* 399 /*
625 * End Dependent Functions Resource 400 * End Tag: This is the normal exit, add size of end_tag
626 */ 401 */
627 bytes_consumed = 1; 402 *size_needed = buffer_size + ACPI_RS_SIZE_MIN;
628 structure_size = ACPI_RESOURCE_LENGTH; 403 return_ACPI_STATUS(AE_OK);
629 break;
630 404
631 case ACPI_RDESC_TYPE_IO_PORT: 405 case ACPI_RESOURCE_NAME_VENDOR_LARGE:
632 /* 406 /*
633 * IO Port Resource 407 * Vendor Resource:
408 * Add vendor data and ensure a 32-bit boundary for the structure
634 */ 409 */
635 bytes_consumed = 8; 410 extra_struct_bytes =
636 structure_size = 411 ACPI_ROUND_UP_to_32_bITS(resource_length) -
637 ACPI_SIZEOF_RESOURCE(struct acpi_resource_io); 412 resource_length;
638 break; 413 break;
639 414
640 case ACPI_RDESC_TYPE_FIXED_IO_PORT: 415 case ACPI_RESOURCE_NAME_ADDRESS32:
416 case ACPI_RESOURCE_NAME_ADDRESS16:
641 /* 417 /*
642 * Fixed IO Port Resource 418 * 32-Bit or 16-bit Address Resource:
419 * Add the size of any optional data (resource_source)
643 */ 420 */
644 bytes_consumed = 4; 421 extra_struct_bytes =
645 structure_size = 422 acpi_rs_stream_option_length(resource_length,
646 ACPI_SIZEOF_RESOURCE(struct acpi_resource_fixed_io); 423 minimum_aml_resource_length);
647 break; 424 break;
648 425
649 case ACPI_RDESC_TYPE_SMALL_VENDOR: 426 case ACPI_RESOURCE_NAME_EXTENDED_IRQ:
650 /* 427 /*
651 * Vendor Specific Resource 428 * Extended IRQ:
429 * Point past the interrupt_vector_flags to get the
430 * interrupt_table_length.
652 */ 431 */
653 buffer = byte_stream_buffer; 432 buffer++;
654 433
655 temp8 = *buffer; 434 extra_struct_bytes =
656 temp8 = (u8) (temp8 & 0x7); 435 /*
657 bytes_consumed = temp8 + 1; 436 * Add 4 bytes for each additional interrupt. Note: at
658 437 * least one interrupt is required and is included in
659 /* Ensure a 32-bit boundary for the structure */ 438 * the minimum descriptor size
660 439 */
661 temp8 = (u8) ACPI_ROUND_UP_to_32_bITS(temp8); 440 ((*buffer - 1) * sizeof(u32)) +
662 structure_size = 441 /* Add the size of any optional data (resource_source) */
663 ACPI_SIZEOF_RESOURCE(struct acpi_resource_vendor) + 442 acpi_rs_stream_option_length(resource_length -
664 (temp8 * sizeof(u8)); 443 extra_struct_bytes,
444 minimum_aml_resource_length);
665 break; 445 break;
666 446
667 case ACPI_RDESC_TYPE_END_TAG: 447 case ACPI_RESOURCE_NAME_ADDRESS64:
668 /* 448 /*
669 * End Tag 449 * 64-Bit Address Resource:
450 * Add the size of any optional data (resource_source)
451 * Ensure a 64-bit boundary for the structure
670 */ 452 */
671 bytes_consumed = 2; 453 extra_struct_bytes =
672 structure_size = ACPI_RESOURCE_LENGTH; 454 ACPI_ROUND_UP_to_64_bITS
673 byte_stream_buffer_length = bytes_parsed; 455 (acpi_rs_stream_option_length
456 (resource_length, minimum_aml_resource_length));
674 break; 457 break;
675 458
676 default: 459 default:
677 /* 460 break;
678 * If we get here, everything is out of sync,
679 * exit with an error
680 */
681 return_ACPI_STATUS(AE_AML_INVALID_RESOURCE_TYPE);
682 } 461 }
683 462
684 /* Update the return value and counter */ 463 /* Update the required buffer size for the internal descriptor structs */
685
686 buffer_size += (u32) ACPI_ALIGN_RESOURCE_SIZE(structure_size);
687 bytes_parsed += bytes_consumed;
688 464
689 /* Set the byte stream to point to the next resource */ 465 temp16 = (u16) (acpi_gbl_resource_struct_sizes[resource_index] +
466 extra_struct_bytes);
467 buffer_size += (u32) ACPI_ROUND_UP_TO_NATIVE_WORD(temp16);
690 468
691 byte_stream_buffer += bytes_consumed; 469 /*
470 * Point to the next resource within the stream
471 * using the size of the header plus the length contained in the header
472 */
473 aml_buffer += acpi_ut_get_descriptor_length(aml_buffer);
692 } 474 }
693 475
694 /* This is the data the caller needs */ 476 /* Did not find an end_tag resource descriptor */
695 477
696 *size_needed = buffer_size; 478 return_ACPI_STATUS(AE_AML_NO_RESOURCE_END_TAG);
697 return_ACPI_STATUS(AE_OK);
698} 479}
699 480
700/******************************************************************************* 481/*******************************************************************************
@@ -760,13 +541,13 @@ acpi_rs_get_pci_routing_table_length(union acpi_operand_object *package_object,
760 541
761 for (table_index = 0; table_index < 4 && !name_found; 542 for (table_index = 0; table_index < 4 && !name_found;
762 table_index++) { 543 table_index++) {
763 if ((ACPI_TYPE_STRING == 544 if (*sub_object_list && /* Null object allowed */
764 ACPI_GET_OBJECT_TYPE(*sub_object_list)) 545 ((ACPI_TYPE_STRING ==
765 || 546 ACPI_GET_OBJECT_TYPE(*sub_object_list)) ||
766 ((ACPI_TYPE_LOCAL_REFERENCE == 547 ((ACPI_TYPE_LOCAL_REFERENCE ==
767 ACPI_GET_OBJECT_TYPE(*sub_object_list)) 548 ACPI_GET_OBJECT_TYPE(*sub_object_list)) &&
768 && ((*sub_object_list)->reference.opcode == 549 ((*sub_object_list)->reference.opcode ==
769 AML_INT_NAMEPATH_OP))) { 550 AML_INT_NAMEPATH_OP)))) {
770 name_found = TRUE; 551 name_found = TRUE;
771 } else { 552 } else {
772 /* Look at the next element */ 553 /* Look at the next element */
generated by cgit v1.2.2 (git 2.25.0) at 2024-10-27 23:30:41 -0400