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-rw-r--r--drivers/acpi/resources/rscalc.c985
1 files changed, 477 insertions, 508 deletions
diff --git a/drivers/acpi/resources/rscalc.c b/drivers/acpi/resources/rscalc.c
index 378f58390fc1..cd051c97bf5b 100644
--- a/drivers/acpi/resources/rscalc.c
+++ b/drivers/acpi/resources/rscalc.c
@@ -44,651 +44,620 @@
44#include <acpi/acpi.h> 44#include <acpi/acpi.h>
45#include <acpi/acresrc.h> 45#include <acpi/acresrc.h>
46#include <acpi/amlcode.h> 46#include <acpi/amlcode.h>
47#include <acpi/amlresrc.h>
47#include <acpi/acnamesp.h> 48#include <acpi/acnamesp.h>
48 49
49#define _COMPONENT ACPI_RESOURCES 50#define _COMPONENT ACPI_RESOURCES
50ACPI_MODULE_NAME("rscalc") 51ACPI_MODULE_NAME("rscalc")
51 52
53/*
54 * Base sizes for external resource descriptors, indexed by internal type.
55 * Includes size of the descriptor header (1 byte for small descriptors,
56 * 3 bytes for large descriptors)
57 */
58static u8 acpi_gbl_stream_sizes[] = {
59 4, /* ACPI_RSTYPE_IRQ (Byte 3 is optional, but always created) */
60 3, /* ACPI_RSTYPE_DMA */
61 2, /* ACPI_RSTYPE_START_DPF (Byte 1 is optional, but always created) */
62 1, /* ACPI_RSTYPE_END_DPF */
63 8, /* ACPI_RSTYPE_IO */
64 4, /* ACPI_RSTYPE_FIXED_IO */
65 1, /* ACPI_RSTYPE_VENDOR */
66 2, /* ACPI_RSTYPE_END_TAG */
67 12, /* ACPI_RSTYPE_MEM24 */
68 20, /* ACPI_RSTYPE_MEM32 */
69 12, /* ACPI_RSTYPE_FIXED_MEM32 */
70 16, /* ACPI_RSTYPE_ADDRESS16 */
71 26, /* ACPI_RSTYPE_ADDRESS32 */
72 46, /* ACPI_RSTYPE_ADDRESS64 */
73 9, /* ACPI_RSTYPE_EXT_IRQ */
74 15 /* ACPI_RSTYPE_GENERIC_REG */
75};
76
77/*
78 * Base sizes of resource descriptors, both the actual AML stream length and
79 * size of the internal struct representation.
80 */
81typedef struct acpi_resource_sizes {
82 u8 minimum_stream_size;
83 u8 minimum_struct_size;
84
85} ACPI_RESOURCE_SIZES;
86
87static ACPI_RESOURCE_SIZES acpi_gbl_sm_resource_sizes[] = {
88 0, 0, /* 0x00, Reserved */
89 0, 0, /* 0x01, Reserved */
90 0, 0, /* 0x02, Reserved */
91 0, 0, /* 0x03, Reserved */
92 3, ACPI_SIZEOF_RESOURCE(struct acpi_resource_irq), /* ACPI_RDESC_TYPE_IRQ_FORMAT */
93 3, ACPI_SIZEOF_RESOURCE(struct acpi_resource_dma), /* ACPI_RDESC_TYPE_DMA_FORMAT */
94 1, ACPI_SIZEOF_RESOURCE(struct acpi_resource_start_dpf), /* ACPI_RDESC_TYPE_START_DEPENDENT */
95 1, ACPI_RESOURCE_LENGTH, /* ACPI_RDESC_TYPE_END_DEPENDENT */
96 8, ACPI_SIZEOF_RESOURCE(struct acpi_resource_io), /* ACPI_RDESC_TYPE_IO_PORT */
97 4, ACPI_SIZEOF_RESOURCE(struct acpi_resource_fixed_io), /* ACPI_RDESC_TYPE_FIXED_IO_PORT */
98 0, 0, /* 0x0A, Reserved */
99 0, 0, /* 0x0B, Reserved */
100 0, 0, /* 0x0C, Reserved */
101 0, 0, /* 0x0D, Reserved */
102 1, ACPI_SIZEOF_RESOURCE(struct acpi_resource_vendor), /* ACPI_RDESC_TYPE_SMALL_VENDOR */
103 2, ACPI_RESOURCE_LENGTH, /* ACPI_RDESC_TYPE_END_TAG */
104};
105
106static ACPI_RESOURCE_SIZES acpi_gbl_lg_resource_sizes[] = {
107 0, 0, /* 0x00, Reserved */
108 12, ACPI_SIZEOF_RESOURCE(struct acpi_resource_mem24), /* ACPI_RDESC_TYPE_MEMORY_24 */
109 15, ACPI_SIZEOF_RESOURCE(struct acpi_resource_generic_reg), /* ACPI_RDESC_TYPE_GENERIC_REGISTER */
110 0, 0, /* 0x03, Reserved */
111 3, ACPI_SIZEOF_RESOURCE(struct acpi_resource_vendor), /* ACPI_RDESC_TYPE_LARGE_VENDOR */
112 20, ACPI_SIZEOF_RESOURCE(struct acpi_resource_mem32), /* ACPI_RDESC_TYPE_MEMORY_32 */
113 12, ACPI_SIZEOF_RESOURCE(struct acpi_resource_fixed_mem32), /* ACPI_RDESC_TYPE_FIXED_MEMORY_32 */
114 26, ACPI_SIZEOF_RESOURCE(struct acpi_resource_address32), /* ACPI_RDESC_TYPE_DWORD_ADDRESS_SPACE */
115 16, ACPI_SIZEOF_RESOURCE(struct acpi_resource_address16), /* ACPI_RDESC_TYPE_WORD_ADDRESS_SPACE */
116 9, ACPI_SIZEOF_RESOURCE(struct acpi_resource_ext_irq), /* ACPI_RDESC_TYPE_EXTENDED_XRUPT */
117 46, ACPI_SIZEOF_RESOURCE(struct acpi_resource_address64), /* ACPI_RDESC_TYPE_QWORD_ADDRESS_SPACE */
118 56, ACPI_SIZEOF_RESOURCE(struct acpi_resource_address64), /* ACPI_RDESC_TYPE_EXTENDED_ADDRESS_SPACE */
119};
120
121/* Local prototypes */
122
123static u8 acpi_rs_count_set_bits(u16 bit_field);
124
125static ACPI_RESOURCE_SIZES *acpi_rs_get_resource_sizes(u8 resource_type);
126
127static u16 acpi_rs_get_resource_length(u8 * resource);
128
129static acpi_size
130acpi_rs_struct_option_length(struct acpi_resource_source *resource_source);
131
132static u32
133acpi_rs_stream_option_length(u32 resource_length, u32 minimum_total_length);
134
52/******************************************************************************* 135/*******************************************************************************
53 * 136 *
54 * FUNCTION: acpi_rs_get_byte_stream_length 137 * FUNCTION: acpi_rs_count_set_bits
55 * 138 *
56 * PARAMETERS: linked_list - Pointer to the resource linked list 139 * 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 * 140 *
60 * RETURN: Status 141 * RETURN: Number of bits set within the field
61 * 142 *
62 * DESCRIPTION: Takes the resource byte stream and parses it once, calculating 143 * 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 144 * (Short descriptor) interrupt and DMA lists.
64 * the resource data.
65 * 145 *
66 ******************************************************************************/ 146 ******************************************************************************/
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");
76 147
77 while (!done) { 148static u8 acpi_rs_count_set_bits(u16 bit_field)
78 /* Init the variable that will hold the size to add to the total. */ 149{
150 u8 bits_set;
79 151
80 segment_size = 0; 152 ACPI_FUNCTION_ENTRY();
81 153
82 switch (linked_list->id) { 154 for (bits_set = 0; bit_field; bits_set++) {
83 case ACPI_RSTYPE_IRQ: 155 /* Zero the least significant bit that is set */
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;
91 156
92 case ACPI_RSTYPE_DMA: 157 bit_field &= (bit_field - 1);
93 /* 158 }
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;
108 159
109 case ACPI_RSTYPE_END_DPF: 160 return (bits_set);
110 /* 161}
111 * End Dependent Functions Resource
112 * For this resource the size is static
113 */
114 segment_size = 1;
115 break;
116 162
117 case ACPI_RSTYPE_IO: 163/*******************************************************************************
118 /* 164 *
119 * IO Port Resource 165 * FUNCTION: acpi_rs_get_resource_sizes
120 * For this resource the size is static 166 *
121 */ 167 * PARAMETERS: resource_type - Byte 0 of a resource descriptor
122 segment_size = 8; 168 *
123 break; 169 * RETURN: Pointer to the resource conversion handler
170 *
171 * DESCRIPTION: Extract the Resource Type/Name from the first byte of
172 * a resource descriptor.
173 *
174 ******************************************************************************/
124 175
125 case ACPI_RSTYPE_FIXED_IO: 176static ACPI_RESOURCE_SIZES *acpi_rs_get_resource_sizes(u8 resource_type)
126 /* 177{
127 * Fixed IO Port Resource 178 ACPI_RESOURCE_SIZES *size_info;
128 * For this resource the size is static
129 */
130 segment_size = 4;
131 break;
132 179
133 case ACPI_RSTYPE_VENDOR: 180 ACPI_FUNCTION_ENTRY();
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;
148 181
149 case ACPI_RSTYPE_END_TAG: 182 /* Determine if this is a small or large resource */
150 /*
151 * End Tag
152 * For this resource the size is static
153 */
154 segment_size = 2;
155 done = TRUE;
156 break;
157 183
158 case ACPI_RSTYPE_MEM24: 184 if (resource_type & ACPI_RDESC_TYPE_LARGE) {
159 /* 185 /* Large Resource Type -- bits 6:0 contain the name */
160 * 24-Bit Memory Resource
161 * For this resource the size is static
162 */
163 segment_size = 12;
164 break;
165 186
166 case ACPI_RSTYPE_MEM32: 187 if (resource_type > ACPI_RDESC_LARGE_MAX) {
167 /* 188 return (NULL);
168 * 32-Bit Memory Range Resource 189 }
169 * For this resource the size is static
170 */
171 segment_size = 20;
172 break;
173 190
174 case ACPI_RSTYPE_FIXED_MEM32: 191 size_info = &acpi_gbl_lg_resource_sizes[(resource_type &
175 /* 192 ACPI_RDESC_LARGE_MASK)];
176 * 32-Bit Fixed Memory Resource 193 } else {
177 * For this resource the size is static 194 /* Small Resource Type -- bits 6:3 contain the name */
178 */
179 segment_size = 12;
180 break;
181 195
182 case ACPI_RSTYPE_ADDRESS16: 196 size_info = &acpi_gbl_sm_resource_sizes[((resource_type &
183 /* 197 ACPI_RDESC_SMALL_MASK)
184 * 16-Bit Address Resource 198 >> 3)];
185 * The base size of this byte stream is 16. If a Resource Source 199 }
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;
199 200
200 case ACPI_RSTYPE_ADDRESS32: 201 /* Zero entry indicates an invalid resource type */
201 /*
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;
218 202
219 case ACPI_RSTYPE_ADDRESS64: 203 if (!size_info->minimum_stream_size) {
220 /* 204 return (NULL);
221 * 64-Bit Address Resource 205 }
222 * The base size of this byte stream is 46. If a resource_source
223 * string is not NULL, add 1 for the Index + the length of the null
224 * terminated string Resource Source + 1 for the null.
225 */
226 segment_size = 46;
227
228 if (linked_list->data.address64.resource_source.
229 string_ptr) {
230 segment_size +=
231 linked_list->data.address64.resource_source.
232 string_length;
233 segment_size++;
234 }
235 break;
236 206
237 case ACPI_RSTYPE_EXT_IRQ: 207 return (size_info);
238 /* 208}
239 * Extended IRQ Resource
240 * The base size of this byte stream is 9. This is for an Interrupt
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;
258 209
259 default: 210/*******************************************************************************
211 *
212 * FUNCTION: acpi_rs_get_resource_length
213 *
214 * PARAMETERS: Resource - Pointer to the resource descriptor
215 *
216 * RETURN: Byte length of the (AML byte stream) descriptor. By definition,
217 * this does not include the size of the descriptor header and the
218 * length field itself.
219 *
220 * DESCRIPTION: Extract the length of a resource descriptor.
221 *
222 ******************************************************************************/
260 223
261 /* If we get here, everything is out of sync, exit with error */ 224static u16 acpi_rs_get_resource_length(u8 * resource)
225{
226 u16 resource_length;
262 227
263 return_ACPI_STATUS(AE_AML_INVALID_RESOURCE_TYPE); 228 ACPI_FUNCTION_ENTRY();
264 229
265 } /* switch (linked_list->Id) */ 230 /* Determine if this is a small or large resource */
266 231
267 /* Update the total */ 232 if (*resource & ACPI_RDESC_TYPE_LARGE) {
233 /* Large Resource type -- length is in bytes 1-2 */
268 234
269 byte_stream_size_needed += segment_size; 235 ACPI_MOVE_16_TO_16(&resource_length, (resource + 1));
270 236
271 /* Point to the next object */ 237 } else {
238 /* Small Resource Type -- bits 2:0 of byte 0 contain the length */
272 239
273 linked_list = ACPI_PTR_ADD(struct acpi_resource, 240 resource_length =
274 linked_list, linked_list->length); 241 (u16) (*resource & ACPI_RDESC_SMALL_LENGTH_MASK);
275 } 242 }
276 243
277 /* This is the data the caller needs */ 244 return (resource_length);
278
279 *size_needed = byte_stream_size_needed;
280 return_ACPI_STATUS(AE_OK);
281} 245}
282 246
283/******************************************************************************* 247/*******************************************************************************
284 * 248 *
285 * FUNCTION: acpi_rs_get_list_length 249 * FUNCTION: acpi_rs_struct_option_length
286 * 250 *
287 * PARAMETERS: byte_stream_buffer - Pointer to the resource byte stream 251 * PARAMETERS: resource_source - Pointer to optional descriptor field
288 * byte_stream_buffer_length - Size of byte_stream_buffer
289 * size_needed - u32 pointer of the size buffer
290 * needed to properly return the
291 * parsed data
292 * 252 *
293 * RETURN: Status 253 * RETURN: Status
294 * 254 *
295 * DESCRIPTION: Takes the resource byte stream and parses it once, calculating 255 * DESCRIPTION: Common code to handle optional resource_source_index and
296 * the size buffer needed to hold the linked list that conveys 256 * resource_source fields in some Large descriptors. Used during
297 * the resource data. 257 * list-to-stream conversion
298 * 258 *
299 ******************************************************************************/ 259 ******************************************************************************/
300 260
301acpi_status 261static acpi_size
302acpi_rs_get_list_length(u8 * byte_stream_buffer, 262acpi_rs_struct_option_length(struct acpi_resource_source *resource_source)
303 u32 byte_stream_buffer_length, acpi_size * size_needed)
304{ 263{
305 u32 buffer_size = 0; 264 ACPI_FUNCTION_ENTRY();
306 u32 bytes_parsed = 0;
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
320 while (bytes_parsed < byte_stream_buffer_length) {
321 /* The next byte in the stream is the resource type */
322
323 resource_type = acpi_rs_get_resource_type(*byte_stream_buffer);
324 265
325 switch (resource_type) { 266 /*
326 case ACPI_RDESC_TYPE_MEMORY_24: 267 * If the resource_source string is valid, return the size of the string
327 /* 268 * (string_length includes the NULL terminator) plus the size of the
328 * 24-Bit Memory Resource 269 * resource_source_index (1).
329 */ 270 */
330 bytes_consumed = 12; 271 if (resource_source->string_ptr) {
331 272 return ((acpi_size) resource_source->string_length + 1);
332 structure_size = 273 }
333 ACPI_SIZEOF_RESOURCE(struct acpi_resource_mem24);
334 break;
335 274
336 case ACPI_RDESC_TYPE_LARGE_VENDOR: 275 return (0);
337 /* 276}
338 * Vendor Defined Resource
339 */
340 buffer = byte_stream_buffer;
341 ++buffer;
342 277
343 ACPI_MOVE_16_TO_16(&temp16, buffer); 278/*******************************************************************************
344 bytes_consumed = temp16 + 3; 279 *
280 * FUNCTION: acpi_rs_stream_option_length
281 *
282 * PARAMETERS: resource_length - Length from the resource header
283 * minimum_total_length - Minimum length of this resource, before
284 * any optional fields. Includes header size
285 *
286 * RETURN: Length of optional string (0 if no string present)
287 *
288 * DESCRIPTION: Common code to handle optional resource_source_index and
289 * resource_source fields in some Large descriptors. Used during
290 * stream-to-list conversion
291 *
292 ******************************************************************************/
345 293
346 /* Ensure a 32-bit boundary for the structure */ 294static u32
295acpi_rs_stream_option_length(u32 resource_length, u32 minimum_total_length)
296{
297 u32 string_length = 0;
298 u32 minimum_resource_length;
347 299
348 temp16 = (u16) ACPI_ROUND_UP_to_32_bITS(temp16); 300 ACPI_FUNCTION_ENTRY();
349 301
350 structure_size = 302 /*
351 ACPI_SIZEOF_RESOURCE(struct acpi_resource_vendor) + 303 * The resource_source_index and resource_source are optional elements of some
352 (temp16 * sizeof(u8)); 304 * Large-type resource descriptors.
353 break; 305 */
354 306
355 case ACPI_RDESC_TYPE_MEMORY_32: 307 /* Compute minimum size of the data part of the resource descriptor */
356 /*
357 * 32-Bit Memory Range Resource
358 */
359 bytes_consumed = 20;
360 308
361 structure_size = 309 minimum_resource_length =
362 ACPI_SIZEOF_RESOURCE(struct acpi_resource_mem32); 310 minimum_total_length - sizeof(struct asl_large_header);
363 break;
364 311
365 case ACPI_RDESC_TYPE_FIXED_MEMORY_32: 312 /*
366 /* 313 * If the length of the actual resource descriptor is greater than the ACPI
367 * 32-Bit Fixed Memory Resource 314 * spec-defined minimum length, it means that a resource_source_index exists
368 */ 315 * and is followed by a (required) null terminated string. The string length
369 bytes_consumed = 12; 316 * (including the null terminator) is the resource length minus the minimum
317 * length, minus one byte for the resource_source_index itself.
318 */
319 if (resource_length > minimum_resource_length) {
320 /* Compute the length of the optional string */
370 321
371 structure_size = 322 string_length = resource_length - minimum_resource_length - 1;
372 ACPI_SIZEOF_RESOURCE(struct 323 }
373 acpi_resource_fixed_mem32);
374 break;
375 324
376 case ACPI_RDESC_TYPE_EXTENDED_ADDRESS_SPACE: 325 /* Round up length to 32 bits for internal structure alignment */
377 /*
378 * 64-Bit Address Resource
379 */
380 buffer = byte_stream_buffer;
381 326
382 ++buffer; 327 return (ACPI_ROUND_UP_to_32_bITS(string_length));
383 ACPI_MOVE_16_TO_16(&temp16, buffer); 328}
384 329
385 bytes_consumed = temp16 + 3; 330/*******************************************************************************
386 structure_size = 331 *
387 ACPI_SIZEOF_RESOURCE(struct 332 * FUNCTION: acpi_rs_get_byte_stream_length
388 acpi_resource_address64); 333 *
389 break; 334 * PARAMETERS: Resource - Pointer to the resource linked list
335 * size_needed - Where the required size is returned
336 *
337 * RETURN: Status
338 *
339 * DESCRIPTION: Takes a linked list of internal resource descriptors and
340 * calculates the size buffer needed to hold the corresponding
341 * external resource byte stream.
342 *
343 ******************************************************************************/
390 344
391 case ACPI_RDESC_TYPE_QWORD_ADDRESS_SPACE: 345acpi_status
392 /* 346acpi_rs_get_byte_stream_length(struct acpi_resource * resource,
393 * 64-Bit Address Resource 347 acpi_size * size_needed)
394 */ 348{
395 buffer = byte_stream_buffer; 349 acpi_size byte_stream_size_needed = 0;
350 acpi_size segment_size;
396 351
397 ++buffer; 352 ACPI_FUNCTION_TRACE("rs_get_byte_stream_length");
398 ACPI_MOVE_16_TO_16(&temp16, buffer);
399 353
400 bytes_consumed = temp16 + 3; 354 /* Traverse entire list of internal resource descriptors */
401 355
402 /* 356 while (resource) {
403 * Resource Source Index and Resource Source are optional elements. 357 /* Validate the descriptor type */
404 * Check the length of the Bytestream. If it is greater than 43,
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 */
410 if (43 < temp16) {
411 temp8 = (u8) (temp16 - 44);
412 } else {
413 temp8 = 0;
414 }
415 358
416 /* Ensure a 64-bit boundary for the structure */ 359 if (resource->type > ACPI_RSTYPE_MAX) {
360 return_ACPI_STATUS(AE_AML_INVALID_RESOURCE_TYPE);
361 }
417 362
418 temp8 = (u8) ACPI_ROUND_UP_to_64_bITS(temp8); 363 /* Get the base size of the (external stream) resource descriptor */
419 364
420 structure_size = 365 segment_size = acpi_gbl_stream_sizes[resource->type];
421 ACPI_SIZEOF_RESOURCE(struct acpi_resource_address64)
422 + (temp8 * sizeof(u8));
423 break;
424 366
425 case ACPI_RDESC_TYPE_DWORD_ADDRESS_SPACE: 367 /*
368 * Augment the base size for descriptors with optional and/or
369 * variable-length fields
370 */
371 switch (resource->type) {
372 case ACPI_RSTYPE_VENDOR:
426 /* 373 /*
427 * 32-Bit Address Resource 374 * Vendor Defined Resource:
375 * For a Vendor Specific resource, if the Length is between 1 and 7
376 * it will be created as a Small Resource data type, otherwise it
377 * is a Large Resource data type.
428 */ 378 */
429 buffer = byte_stream_buffer; 379 if (resource->data.vendor_specific.length > 7) {
430 380 /* Base size of a Large resource descriptor */
431 ++buffer;
432 ACPI_MOVE_16_TO_16(&temp16, buffer);
433 381
434 bytes_consumed = temp16 + 3; 382 segment_size = 3;
435
436 /*
437 * Resource Source Index and Resource Source are optional elements.
438 * Check the length of the Bytestream. If it is greater than 23,
439 * that means that an Index exists and is followed by a null
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 */
444 if (23 < temp16) {
445 temp8 = (u8) (temp16 - 24);
446 } else {
447 temp8 = 0;
448 } 383 }
449 384
450 /* Ensure a 32-bit boundary for the structure */ 385 /* Add the size of the vendor-specific data */
451 386
452 temp8 = (u8) ACPI_ROUND_UP_to_32_bITS(temp8); 387 segment_size += resource->data.vendor_specific.length;
453
454 structure_size =
455 ACPI_SIZEOF_RESOURCE(struct acpi_resource_address32)
456 + (temp8 * sizeof(u8));
457 break; 388 break;
458 389
459 case ACPI_RDESC_TYPE_WORD_ADDRESS_SPACE: 390 case ACPI_RSTYPE_END_TAG:
460 /* 391 /*
461 * 16-Bit Address Resource 392 * End Tag:
393 * We are done -- return the accumulated total size.
462 */ 394 */
463 buffer = byte_stream_buffer; 395 *size_needed = byte_stream_size_needed + segment_size;
464 396
465 ++buffer; 397 /* Normal exit */
466 ACPI_MOVE_16_TO_16(&temp16, buffer);
467 398
468 bytes_consumed = temp16 + 3; 399 return_ACPI_STATUS(AE_OK);
469 400
401 case ACPI_RSTYPE_ADDRESS16:
470 /* 402 /*
471 * Resource Source Index and Resource Source are optional elements. 403 * 16-Bit Address Resource:
472 * Check the length of the Bytestream. If it is greater than 13, 404 * Add the size of the optional resource_source info
473 * that means that an Index exists and is followed by a null
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 */ 405 */
478 if (13 < temp16) { 406 segment_size +=
479 temp8 = (u8) (temp16 - 14); 407 acpi_rs_struct_option_length(&resource->data.
480 } else { 408 address16.
481 temp8 = 0; 409 resource_source);
482 }
483
484 /* Ensure a 32-bit boundary for the structure */
485
486 temp8 = (u8) ACPI_ROUND_UP_to_32_bITS(temp8);
487
488 structure_size =
489 ACPI_SIZEOF_RESOURCE(struct acpi_resource_address16)
490 + (temp8 * sizeof(u8));
491 break; 410 break;
492 411
493 case ACPI_RDESC_TYPE_EXTENDED_XRUPT: 412 case ACPI_RSTYPE_ADDRESS32:
494 /*
495 * Extended IRQ
496 */
497 buffer = byte_stream_buffer;
498
499 ++buffer;
500 ACPI_MOVE_16_TO_16(&temp16, buffer);
501
502 bytes_consumed = temp16 + 3;
503
504 /* 413 /*
505 * Point past the length field and the Interrupt vector flags to 414 * 32-Bit Address Resource:
506 * save off the Interrupt table length to the Temp8 variable. 415 * Add the size of the optional resource_source info
507 */ 416 */
508 buffer += 3; 417 segment_size +=
509 temp8 = *buffer; 418 acpi_rs_struct_option_length(&resource->data.
419 address32.
420 resource_source);
421 break;
510 422
423 case ACPI_RSTYPE_ADDRESS64:
511 /* 424 /*
512 * To compensate for multiple interrupt numbers, add 4 bytes for 425 * 64-Bit Address Resource:
513 * each additional interrupts greater than 1 426 * Add the size of the optional resource_source info
514 */ 427 */
515 additional_bytes = (u8) ((temp8 - 1) * 4); 428 segment_size +=
429 acpi_rs_struct_option_length(&resource->data.
430 address64.
431 resource_source);
432 break;
516 433
434 case ACPI_RSTYPE_EXT_IRQ:
517 /* 435 /*
518 * Resource Source Index and Resource Source are optional elements. 436 * Extended IRQ Resource:
519 * Check the length of the Bytestream. If it is greater than 9, 437 * Add the size of each additional optional interrupt beyond the
520 * that means that an Index exists and is followed by a null 438 * required 1 (4 bytes for each u32 interrupt number)
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 */ 439 */
525 if (9 + additional_bytes < temp16) { 440 segment_size += (((acpi_size)
526 temp8 = (u8) (temp16 - (9 + additional_bytes)); 441 resource->data.extended_irq.
527 } else { 442 number_of_interrupts - 1) * 4);
528 temp8 = 0;
529 }
530 443
531 /* Ensure a 32-bit boundary for the structure */ 444 /* Add the size of the optional resource_source info */
532 445
533 temp8 = (u8) ACPI_ROUND_UP_to_32_bITS(temp8); 446 segment_size +=
447 acpi_rs_struct_option_length(&resource->data.
448 extended_irq.
449 resource_source);
450 break;
534 451
535 structure_size = 452 default:
536 ACPI_SIZEOF_RESOURCE(struct acpi_resource_ext_irq) +
537 (additional_bytes * sizeof(u8)) +
538 (temp8 * sizeof(u8));
539 break; 453 break;
454 }
540 455
541 case ACPI_RDESC_TYPE_IRQ_FORMAT: 456 /* Update the total */
542 /*
543 * IRQ Resource.
544 * Determine if it there are two or three trailing bytes
545 */
546 buffer = byte_stream_buffer;
547 temp8 = *buffer;
548 457
549 if (temp8 & 0x01) { 458 byte_stream_size_needed += segment_size;
550 bytes_consumed = 4;
551 } else {
552 bytes_consumed = 3;
553 }
554 459
555 /* Point past the descriptor */ 460 /* Point to the next object */
556 461
557 ++buffer; 462 resource = ACPI_PTR_ADD(struct acpi_resource,
463 resource, resource->length);
464 }
558 465
559 /* Look at the number of bits set */ 466 /* Did not find an END_TAG descriptor */
560 467
561 ACPI_MOVE_16_TO_16(&temp16, buffer); 468 return_ACPI_STATUS(AE_AML_INVALID_RESOURCE_TYPE);
469}
562 470
563 for (index = 0; index < 16; index++) { 471/*******************************************************************************
564 if (temp16 & 0x1) { 472 *
565 ++number_of_interrupts; 473 * FUNCTION: acpi_rs_get_list_length
566 } 474 *
475 * PARAMETERS: byte_stream_buffer - Pointer to the resource byte stream
476 * byte_stream_buffer_length - Size of byte_stream_buffer
477 * size_needed - Where the size needed is returned
478 *
479 * RETURN: Status
480 *
481 * DESCRIPTION: Takes an external resource byte stream and calculates the size
482 * buffer needed to hold the corresponding internal resource
483 * descriptor linked list.
484 *
485 ******************************************************************************/
567 486
568 temp16 >>= 1; 487acpi_status
569 } 488acpi_rs_get_list_length(u8 * byte_stream_buffer,
489 u32 byte_stream_buffer_length, acpi_size * size_needed)
490{
491 u8 *buffer;
492 ACPI_RESOURCE_SIZES *resource_info;
493 u32 buffer_size = 0;
494 u32 bytes_parsed = 0;
495 u8 resource_type;
496 u16 temp16;
497 u16 resource_length;
498 u16 header_length;
499 u32 extra_struct_bytes;
570 500
571 structure_size = 501 ACPI_FUNCTION_TRACE("rs_get_list_length");
572 ACPI_SIZEOF_RESOURCE(struct acpi_resource_io) +
573 (number_of_interrupts * sizeof(u32));
574 break;
575 502
576 case ACPI_RDESC_TYPE_DMA_FORMAT: 503 while (bytes_parsed < byte_stream_buffer_length) {
577 /* 504 /* The next byte in the stream is the resource descriptor type */
578 * DMA Resource
579 */
580 buffer = byte_stream_buffer;
581 bytes_consumed = 3;
582 505
583 /* Point past the descriptor */ 506 resource_type = acpi_rs_get_resource_type(*byte_stream_buffer);
584 507
585 ++buffer; 508 /* Get the base stream size and structure sizes for the descriptor */
586 509
587 /* Look at the number of bits set */ 510 resource_info = acpi_rs_get_resource_sizes(resource_type);
511 if (!resource_info) {
512 return_ACPI_STATUS(AE_AML_INVALID_RESOURCE_TYPE);
513 }
588 514
589 temp8 = *buffer; 515 /* Get the Length field from the input resource descriptor */
590 516
591 for (index = 0; index < 8; index++) { 517 resource_length =
592 if (temp8 & 0x1) { 518 acpi_rs_get_resource_length(byte_stream_buffer);
593 ++number_of_channels;
594 }
595 519
596 temp8 >>= 1; 520 /* Augment the size for descriptors with optional fields */
597 }
598 521
599 structure_size = 522 extra_struct_bytes = 0;
600 ACPI_SIZEOF_RESOURCE(struct acpi_resource_dma) +
601 (number_of_channels * sizeof(u32));
602 break;
603 523
604 case ACPI_RDESC_TYPE_START_DEPENDENT: 524 if (!(resource_type & ACPI_RDESC_TYPE_LARGE)) {
605 /* 525 /*
606 * Start Dependent Functions Resource 526 * Small resource descriptors
607 * Determine if it there are two or three trailing bytes
608 */ 527 */
609 buffer = byte_stream_buffer; 528 header_length = 1;
610 temp8 = *buffer; 529 buffer = byte_stream_buffer + header_length;
611 530
612 if (temp8 & 0x01) { 531 switch (resource_type) {
613 bytes_consumed = 2; 532 case ACPI_RDESC_TYPE_IRQ_FORMAT:
614 } else { 533 /*
615 bytes_consumed = 1; 534 * IRQ Resource:
616 } 535 * Get the number of bits set in the IRQ word
536 */
537 ACPI_MOVE_16_TO_16(&temp16, buffer);
617 538
618 structure_size = 539 extra_struct_bytes =
619 ACPI_SIZEOF_RESOURCE(struct 540 (acpi_rs_count_set_bits(temp16) *
620 acpi_resource_start_dpf); 541 sizeof(u32));
621 break; 542 break;
622 543
623 case ACPI_RDESC_TYPE_END_DEPENDENT: 544 case ACPI_RDESC_TYPE_DMA_FORMAT:
624 /* 545 /*
625 * End Dependent Functions Resource 546 * DMA Resource:
626 */ 547 * Get the number of bits set in the DMA channels byte
627 bytes_consumed = 1; 548 */
628 structure_size = ACPI_RESOURCE_LENGTH; 549 extra_struct_bytes =
629 break; 550 (acpi_rs_count_set_bits((u16) * buffer) *
551 sizeof(u32));
552 break;
630 553
631 case ACPI_RDESC_TYPE_IO_PORT: 554 case ACPI_RDESC_TYPE_SMALL_VENDOR:
632 /* 555 /*
633 * IO Port Resource 556 * Vendor Specific Resource:
634 */ 557 * Ensure a 32-bit boundary for the structure
635 bytes_consumed = 8; 558 */
636 structure_size = 559 extra_struct_bytes =
637 ACPI_SIZEOF_RESOURCE(struct acpi_resource_io); 560 ACPI_ROUND_UP_to_32_bITS(resource_length);
638 break; 561 break;
639 562
640 case ACPI_RDESC_TYPE_FIXED_IO_PORT: 563 case ACPI_RDESC_TYPE_END_TAG:
641 /* 564 /*
642 * Fixed IO Port Resource 565 * End Tag:
643 */ 566 * Terminate the loop now
644 bytes_consumed = 4; 567 */
645 structure_size = 568 byte_stream_buffer_length = bytes_parsed;
646 ACPI_SIZEOF_RESOURCE(struct acpi_resource_fixed_io); 569 break;
647 break;
648 570
649 case ACPI_RDESC_TYPE_SMALL_VENDOR: 571 default:
572 break;
573 }
574 } else {
650 /* 575 /*
651 * Vendor Specific Resource 576 * Large resource descriptors
652 */ 577 */
653 buffer = byte_stream_buffer; 578 header_length = sizeof(struct asl_large_header);
579 buffer = byte_stream_buffer + header_length;
654 580
655 temp8 = *buffer; 581 switch (resource_type) {
656 temp8 = (u8) (temp8 & 0x7); 582 case ACPI_RDESC_TYPE_LARGE_VENDOR:
657 bytes_consumed = temp8 + 1; 583 /*
584 * Vendor Defined Resource:
585 * Add vendor data and ensure a 32-bit boundary for the structure
586 */
587 extra_struct_bytes =
588 ACPI_ROUND_UP_to_32_bITS(resource_length);
589 break;
658 590
659 /* Ensure a 32-bit boundary for the structure */ 591 case ACPI_RDESC_TYPE_DWORD_ADDRESS_SPACE:
592 case ACPI_RDESC_TYPE_WORD_ADDRESS_SPACE:
593 /*
594 * 32-Bit or 16-bit Address Resource:
595 * Add the size of any optional data (resource_source)
596 */
597 extra_struct_bytes =
598 acpi_rs_stream_option_length
599 (resource_length,
600 resource_info->minimum_stream_size);
601 break;
660 602
661 temp8 = (u8) ACPI_ROUND_UP_to_32_bITS(temp8); 603 case ACPI_RDESC_TYPE_EXTENDED_XRUPT:
662 structure_size = 604 /*
663 ACPI_SIZEOF_RESOURCE(struct acpi_resource_vendor) + 605 * Extended IRQ:
664 (temp8 * sizeof(u8)); 606 * Point past the interrupt_vector_flags to get the
665 break; 607 * interrupt_table_length.
608 */
609 buffer++;
666 610
667 case ACPI_RDESC_TYPE_END_TAG: 611 /*
668 /* 612 * Add 4 bytes for each additional interrupt. Note: at least one
669 * End Tag 613 * interrupt is required and is included in the minimum
670 */ 614 * descriptor size
671 bytes_consumed = 2; 615 */
672 structure_size = ACPI_RESOURCE_LENGTH; 616 extra_struct_bytes =
673 byte_stream_buffer_length = bytes_parsed; 617 ((*buffer - 1) * sizeof(u32));
674 break;
675 618
676 default: 619 /* Add the size of any optional data (resource_source) */
677 /*
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 }
683 620
684 /* Update the return value and counter */ 621 extra_struct_bytes +=
622 acpi_rs_stream_option_length(resource_length
623 -
624 extra_struct_bytes,
625 resource_info->
626 minimum_stream_size);
627 break;
685 628
686 buffer_size += (u32) ACPI_ALIGN_RESOURCE_SIZE(structure_size); 629 case ACPI_RDESC_TYPE_QWORD_ADDRESS_SPACE:
687 bytes_parsed += bytes_consumed; 630 /*
631 * 64-Bit Address Resource:
632 * Add the size of any optional data (resource_source)
633 * Ensure a 64-bit boundary for the structure
634 */
635 extra_struct_bytes =
636 ACPI_ROUND_UP_to_64_bITS
637 (acpi_rs_stream_option_length
638 (resource_length,
639 resource_info->minimum_stream_size));
640 break;
641
642 default:
643 break;
644 }
645 }
646
647 /* Update the required buffer size for the internal descriptor structs */
688 648
689 /* Set the byte stream to point to the next resource */ 649 temp16 =
650 (u16) (resource_info->minimum_struct_size +
651 extra_struct_bytes);
652 buffer_size += (u32) ACPI_ALIGN_RESOURCE_SIZE(temp16);
690 653
691 byte_stream_buffer += bytes_consumed; 654 /*
655 * Update byte count and point to the next resource within the stream
656 * using the size of the header plus the length contained in the header
657 */
658 temp16 = (u16) (header_length + resource_length);
659 bytes_parsed += temp16;
660 byte_stream_buffer += temp16;
692 } 661 }
693 662
694 /* This is the data the caller needs */ 663 /* This is the data the caller needs */
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-11 06:55:14 -0500