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path: root/drivers/acpi/resources/rslist.c
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Diffstat (limited to 'drivers/acpi/resources/rslist.c')
-rw-r--r--drivers/acpi/resources/rslist.c290
1 files changed, 146 insertions, 144 deletions
diff --git a/drivers/acpi/resources/rslist.c b/drivers/acpi/resources/rslist.c
index 87e75349dd0a..f72d42e0927b 100644
--- a/drivers/acpi/resources/rslist.c
+++ b/drivers/acpi/resources/rslist.c
@@ -47,106 +47,70 @@
47#define _COMPONENT ACPI_RESOURCES 47#define _COMPONENT ACPI_RESOURCES
48ACPI_MODULE_NAME("rslist") 48ACPI_MODULE_NAME("rslist")
49 49
50/* Dispatch table for convert-to-stream functions */
51typedef
52acpi_status(*ACPI_STREAM_HANDLER) (struct acpi_resource * resource,
53 u8 ** output_buffer,
54 acpi_size * bytes_consumed);
55
56static ACPI_STREAM_HANDLER acpi_gbl_stream_dispatch[] = {
57 acpi_rs_irq_stream, /* ACPI_RSTYPE_IRQ */
58 acpi_rs_dma_stream, /* ACPI_RSTYPE_DMA */
59 acpi_rs_start_depend_fns_stream, /* ACPI_RSTYPE_START_DPF */
60 acpi_rs_end_depend_fns_stream, /* ACPI_RSTYPE_END_DPF */
61 acpi_rs_io_stream, /* ACPI_RSTYPE_IO */
62 acpi_rs_fixed_io_stream, /* ACPI_RSTYPE_FIXED_IO */
63 acpi_rs_vendor_stream, /* ACPI_RSTYPE_VENDOR */
64 acpi_rs_end_tag_stream, /* ACPI_RSTYPE_END_TAG */
65 acpi_rs_memory24_stream, /* ACPI_RSTYPE_MEM24 */
66 acpi_rs_memory32_range_stream, /* ACPI_RSTYPE_MEM32 */
67 acpi_rs_fixed_memory32_stream, /* ACPI_RSTYPE_FIXED_MEM32 */
68 acpi_rs_address16_stream, /* ACPI_RSTYPE_ADDRESS16 */
69 acpi_rs_address32_stream, /* ACPI_RSTYPE_ADDRESS32 */
70 acpi_rs_address64_stream, /* ACPI_RSTYPE_ADDRESS64 */
71 acpi_rs_extended_irq_stream, /* ACPI_RSTYPE_EXT_IRQ */
72 acpi_rs_generic_register_stream /* ACPI_RSTYPE_GENERIC_REG */
73};
74
75/* Dispatch tables for convert-to-resource functions */
76
77typedef
78acpi_status(*ACPI_RESOURCE_HANDLER) (u8 * byte_stream_buffer,
79 acpi_size * bytes_consumed,
80 u8 ** output_buffer,
81 acpi_size * structure_size);
82
83static ACPI_RESOURCE_HANDLER acpi_gbl_sm_resource_dispatch[] = {
84 NULL, /* 0x00, Reserved */
85 NULL, /* 0x01, Reserved */
86 NULL, /* 0x02, Reserved */
87 NULL, /* 0x03, Reserved */
88 acpi_rs_irq_resource, /* ACPI_RDESC_TYPE_IRQ_FORMAT */
89 acpi_rs_dma_resource, /* ACPI_RDESC_TYPE_DMA_FORMAT */
90 acpi_rs_start_depend_fns_resource, /* ACPI_RDESC_TYPE_START_DEPENDENT */
91 acpi_rs_end_depend_fns_resource, /* ACPI_RDESC_TYPE_END_DEPENDENT */
92 acpi_rs_io_resource, /* ACPI_RDESC_TYPE_IO_PORT */
93 acpi_rs_fixed_io_resource, /* ACPI_RDESC_TYPE_FIXED_IO_PORT */
94 NULL, /* 0x0A, Reserved */
95 NULL, /* 0x0B, Reserved */
96 NULL, /* 0x0C, Reserved */
97 NULL, /* 0x0D, Reserved */
98 acpi_rs_vendor_resource, /* ACPI_RDESC_TYPE_SMALL_VENDOR */
99 acpi_rs_end_tag_resource /* ACPI_RDESC_TYPE_END_TAG */
100};
101
102static ACPI_RESOURCE_HANDLER acpi_gbl_lg_resource_dispatch[] = {
103 NULL, /* 0x00, Reserved */
104 acpi_rs_memory24_resource, /* ACPI_RDESC_TYPE_MEMORY_24 */
105 acpi_rs_generic_register_resource, /* ACPI_RDESC_TYPE_GENERIC_REGISTER */
106 NULL, /* 0x03, Reserved */
107 acpi_rs_vendor_resource, /* ACPI_RDESC_TYPE_LARGE_VENDOR */
108 acpi_rs_memory32_range_resource, /* ACPI_RDESC_TYPE_MEMORY_32 */
109 acpi_rs_fixed_memory32_resource, /* ACPI_RDESC_TYPE_FIXED_MEMORY_32 */
110 acpi_rs_address32_resource, /* ACPI_RDESC_TYPE_DWORD_ADDRESS_SPACE */
111 acpi_rs_address16_resource, /* ACPI_RDESC_TYPE_WORD_ADDRESS_SPACE */
112 acpi_rs_extended_irq_resource, /* ACPI_RDESC_TYPE_EXTENDED_XRUPT */
113 acpi_rs_address64_resource, /* ACPI_RDESC_TYPE_QWORD_ADDRESS_SPACE */
114 acpi_rs_address64_resource /* ACPI_RDESC_TYPE_EXTENDED_ADDRESS_SPACE */
115};
116
117/* Local prototypes */ 50/* Local prototypes */
51static ACPI_GET_RESOURCE_HANDLER acpi_rs_get_resource_handler(u8 resource_type);
118 52
119static ACPI_RESOURCE_HANDLER acpi_rs_get_resource_handler(u8 resource_type); 53static acpi_status acpi_rs_validate_resource_length(union aml_resource *aml);
120 54
121/******************************************************************************* 55/*******************************************************************************
122 * 56 *
123 * FUNCTION: acpi_rs_get_resource_type 57 * FUNCTION: acpi_rs_validate_resource_length
124 * 58 *
125 * PARAMETERS: resource_type - Byte 0 of a resource descriptor 59 * PARAMETERS: Aml - Pointer to the AML resource descriptor
126 * 60 *
127 * RETURN: The Resource Type with no extraneous bits (except the large/ 61 * RETURN: Status - AE_OK if the resource length appears valid
128 * small bit -- left alone)
129 * 62 *
130 * DESCRIPTION: Extract the Resource Type/Name from the first byte of 63 * DESCRIPTION: Validate the resource_length. Fixed-length descriptors must
131 * a resource descriptor. 64 * have the exact length; variable-length descriptors must be
65 * at least as long as the minimum. Certain Small descriptors
66 * can vary in size by at most one byte.
132 * 67 *
133 ******************************************************************************/ 68 ******************************************************************************/
134 69
135u8 acpi_rs_get_resource_type(u8 resource_type) 70static acpi_status acpi_rs_validate_resource_length(union aml_resource *aml)
136{ 71{
72 struct acpi_resource_info *resource_info;
73 u16 minimum_aml_resource_length;
74 u16 resource_length;
75
137 ACPI_FUNCTION_ENTRY(); 76 ACPI_FUNCTION_ENTRY();
138 77
139 /* Determine if this is a small or large resource */ 78 /* Get the size and type info about this resource descriptor */
140 79
141 if (resource_type & ACPI_RDESC_TYPE_LARGE) { 80 resource_info =
142 /* Large Resource Type -- bits 6:0 contain the name */ 81 acpi_rs_get_resource_info(aml->small_header.descriptor_type);
82 if (!resource_info) {
83 return (AE_AML_INVALID_RESOURCE_TYPE);
84 }
85
86 resource_length = acpi_rs_get_resource_length(aml);
87 minimum_aml_resource_length =
88 resource_info->minimum_aml_resource_length;
89
90 /* Validate based upon the type of resource, fixed length or variable */
91
92 if (resource_info->length_type == ACPI_FIXED_LENGTH) {
93 /* Fixed length resource, length must match exactly */
143 94
144 return (resource_type); 95 if (resource_length != minimum_aml_resource_length) {
96 return (AE_AML_BAD_RESOURCE_LENGTH);
97 }
98 } else if (resource_info->length_type == ACPI_VARIABLE_LENGTH) {
99 /* Variable length resource, must be at least the minimum */
100
101 if (resource_length < minimum_aml_resource_length) {
102 return (AE_AML_BAD_RESOURCE_LENGTH);
103 }
145 } else { 104 } else {
146 /* Small Resource Type -- bits 6:3 contain the name */ 105 /* Small variable length resource, allowed to be (Min) or (Min-1) */
147 106
148 return ((u8) (resource_type & ACPI_RDESC_SMALL_MASK)); 107 if ((resource_length > minimum_aml_resource_length) ||
108 (resource_length < (minimum_aml_resource_length - 1))) {
109 return (AE_AML_BAD_RESOURCE_LENGTH);
110 }
149 } 111 }
112
113 return (AE_OK);
150} 114}
151 115
152/******************************************************************************* 116/*******************************************************************************
@@ -162,38 +126,38 @@ u8 acpi_rs_get_resource_type(u8 resource_type)
162 * 126 *
163 ******************************************************************************/ 127 ******************************************************************************/
164 128
165static ACPI_RESOURCE_HANDLER acpi_rs_get_resource_handler(u8 resource_type) 129static ACPI_GET_RESOURCE_HANDLER acpi_rs_get_resource_handler(u8 resource_type)
166{ 130{
167 ACPI_FUNCTION_ENTRY(); 131 ACPI_FUNCTION_ENTRY();
168 132
169 /* Determine if this is a small or large resource */ 133 /* Determine if this is a small or large resource */
170 134
171 if (resource_type & ACPI_RDESC_TYPE_LARGE) { 135 if (resource_type & ACPI_RESOURCE_NAME_LARGE) {
172 /* Large Resource Type -- bits 6:0 contain the name */ 136 /* Large Resource Type -- bits 6:0 contain the name */
173 137
174 if (resource_type > ACPI_RDESC_LARGE_MAX) { 138 if (resource_type > ACPI_RESOURCE_NAME_LARGE_MAX) {
175 return (NULL); 139 return (NULL);
176 } 140 }
177 141
178 return (acpi_gbl_lg_resource_dispatch[(resource_type & 142 return (acpi_gbl_lg_get_resource_dispatch[(resource_type &
179 ACPI_RDESC_LARGE_MASK)]); 143 ACPI_RESOURCE_NAME_LARGE_MASK)]);
180 } else { 144 } else {
181 /* Small Resource Type -- bits 6:3 contain the name */ 145 /* Small Resource Type -- bits 6:3 contain the name */
182 146
183 return (acpi_gbl_sm_resource_dispatch[((resource_type & 147 return (acpi_gbl_sm_get_resource_dispatch[((resource_type &
184 ACPI_RDESC_SMALL_MASK) 148 ACPI_RESOURCE_NAME_SMALL_MASK)
185 >> 3)]); 149 >> 3)]);
186 } 150 }
187} 151}
188 152
189/******************************************************************************* 153/*******************************************************************************
190 * 154 *
191 * FUNCTION: acpi_rs_byte_stream_to_list 155 * FUNCTION: acpi_rs_convert_aml_to_resources
192 * 156 *
193 * PARAMETERS: byte_stream_buffer - Pointer to the resource byte stream 157 * PARAMETERS: aml_buffer - Pointer to the resource byte stream
194 * byte_stream_buffer_length - Length of byte_stream_buffer 158 * aml_buffer_length - Length of aml_buffer
195 * output_buffer - Pointer to the buffer that will 159 * output_buffer - Pointer to the buffer that will
196 * contain the output structures 160 * contain the output structures
197 * 161 *
198 * RETURN: Status 162 * RETURN: Status
199 * 163 *
@@ -203,37 +167,60 @@ static ACPI_RESOURCE_HANDLER acpi_rs_get_resource_handler(u8 resource_type)
203 ******************************************************************************/ 167 ******************************************************************************/
204 168
205acpi_status 169acpi_status
206acpi_rs_byte_stream_to_list(u8 * byte_stream_buffer, 170acpi_rs_convert_aml_to_resources(u8 * aml_buffer,
207 u32 byte_stream_buffer_length, u8 * output_buffer) 171 u32 aml_buffer_length, u8 * output_buffer)
208{ 172{
209 u8 *buffer = output_buffer; 173 u8 *buffer = output_buffer;
210 acpi_status status; 174 acpi_status status;
211 acpi_size bytes_parsed = 0; 175 acpi_size bytes_parsed = 0;
212 acpi_size bytes_consumed = 0;
213 acpi_size structure_size = 0;
214 struct acpi_resource *resource; 176 struct acpi_resource *resource;
215 ACPI_RESOURCE_HANDLER handler; 177 u16 resource_length;
178 u32 descriptor_length;
179 ACPI_GET_RESOURCE_HANDLER handler;
216 180
217 ACPI_FUNCTION_TRACE("rs_byte_stream_to_list"); 181 ACPI_FUNCTION_TRACE("rs_convert_aml_to_resources");
218 182
219 /* Loop until end-of-buffer or an end_tag is found */ 183 /* Loop until end-of-buffer or an end_tag is found */
220 184
221 while (bytes_parsed < byte_stream_buffer_length) { 185 while (bytes_parsed < aml_buffer_length) {
222 /* Get the handler associated with this Descriptor Type */ 186 /* Get the handler associated with this Descriptor Type */
223 187
224 handler = acpi_rs_get_resource_handler(*byte_stream_buffer); 188 handler = acpi_rs_get_resource_handler(*aml_buffer);
225 if (handler) { 189 if (!handler) {
226 /* Convert a byte stream resource to local resource struct */ 190 /* No handler indicates invalid resource type */
227 191
228 status = handler(byte_stream_buffer, &bytes_consumed, 192 return_ACPI_STATUS(AE_AML_INVALID_RESOURCE_TYPE);
229 &buffer, &structure_size); 193 }
230 } else {
231 /* Invalid resource type */
232 194
233 status = AE_AML_INVALID_RESOURCE_TYPE; 195 resource_length =
196 acpi_rs_get_resource_length(ACPI_CAST_PTR
197 (union aml_resource,
198 aml_buffer));
199
200 descriptor_length =
201 acpi_rs_get_descriptor_length(ACPI_CAST_PTR
202 (union aml_resource,
203 aml_buffer));
204
205 /*
206 * Perform limited validation of the resource length, based upon
207 * what we know about the resource type
208 */
209 status =
210 acpi_rs_validate_resource_length(ACPI_CAST_PTR
211 (union aml_resource,
212 aml_buffer));
213 if (ACPI_FAILURE(status)) {
214 return_ACPI_STATUS(status);
234 } 215 }
235 216
217 /* Convert a byte stream resource to local resource struct */
218
219 status = handler(ACPI_CAST_PTR(union aml_resource, aml_buffer),
220 resource_length,
221 ACPI_CAST_PTR(struct acpi_resource, buffer));
236 if (ACPI_FAILURE(status)) { 222 if (ACPI_FAILURE(status)) {
223 ACPI_REPORT_ERROR(("Could not convert AML resource (type %X) to resource, %s\n", *aml_buffer, acpi_format_exception(status)));
237 return_ACPI_STATUS(status); 224 return_ACPI_STATUS(status);
238 } 225 }
239 226
@@ -245,19 +232,19 @@ acpi_rs_byte_stream_to_list(u8 * byte_stream_buffer,
245 232
246 /* Normal exit on completion of an end_tag resource descriptor */ 233 /* Normal exit on completion of an end_tag resource descriptor */
247 234
248 if (acpi_rs_get_resource_type(*byte_stream_buffer) == 235 if (acpi_rs_get_resource_type(*aml_buffer) ==
249 ACPI_RDESC_TYPE_END_TAG) { 236 ACPI_RESOURCE_NAME_END_TAG) {
250 return_ACPI_STATUS(AE_OK); 237 return_ACPI_STATUS(AE_OK);
251 } 238 }
252 239
253 /* Update counter and point to the next input resource */ 240 /* Update counter and point to the next input resource */
254 241
255 bytes_parsed += bytes_consumed; 242 bytes_parsed += descriptor_length;
256 byte_stream_buffer += bytes_consumed; 243 aml_buffer += descriptor_length;
257 244
258 /* Point to the next structure in the output buffer */ 245 /* Point to the next structure in the output buffer */
259 246
260 buffer += ACPI_ALIGN_RESOURCE_SIZE(structure_size); 247 buffer += resource->length;
261 } 248 }
262 249
263 /* Completed buffer, but did not find an end_tag resource descriptor */ 250 /* Completed buffer, but did not find an end_tag resource descriptor */
@@ -267,17 +254,15 @@ acpi_rs_byte_stream_to_list(u8 * byte_stream_buffer,
267 254
268/******************************************************************************* 255/*******************************************************************************
269 * 256 *
270 * FUNCTION: acpi_rs_list_to_byte_stream 257 * FUNCTION: acpi_rs_convert_resources_to_aml
271 * 258 *
272 * PARAMETERS: Resource - Pointer to the resource linked list 259 * PARAMETERS: Resource - Pointer to the resource linked list
273 * byte_steam_size_needed - Calculated size of the byte stream 260 * aml_size_needed - Calculated size of the byte stream
274 * needed from calling 261 * needed from calling acpi_rs_get_aml_length()
275 * acpi_rs_get_byte_stream_length() 262 * The size of the output_buffer is
276 * The size of the output_buffer is 263 * guaranteed to be >= aml_size_needed
277 * guaranteed to be >= 264 * output_buffer - Pointer to the buffer that will
278 * byte_stream_size_needed 265 * contain the byte stream
279 * output_buffer - Pointer to the buffer that will
280 * contain the byte stream
281 * 266 *
282 * RETURN: Status 267 * RETURN: Status
283 * 268 *
@@ -287,52 +272,69 @@ acpi_rs_byte_stream_to_list(u8 * byte_stream_buffer,
287 ******************************************************************************/ 272 ******************************************************************************/
288 273
289acpi_status 274acpi_status
290acpi_rs_list_to_byte_stream(struct acpi_resource *resource, 275acpi_rs_convert_resources_to_aml(struct acpi_resource *resource,
291 acpi_size byte_stream_size_needed, 276 acpi_size aml_size_needed, u8 * output_buffer)
292 u8 * output_buffer)
293{ 277{
294 u8 *buffer = output_buffer; 278 u8 *aml_buffer = output_buffer;
295 acpi_size bytes_consumed = 0;
296 acpi_status status; 279 acpi_status status;
297 280
298 ACPI_FUNCTION_TRACE("rs_list_to_byte_stream"); 281 ACPI_FUNCTION_TRACE("rs_convert_resources_to_aml");
299 282
300 /* Convert each resource descriptor in the list */ 283 /* Convert each resource descriptor in the list */
301 284
302 while (1) { 285 while (1) {
303 /* Validate Type before dispatch */ 286 /* Validate Resource Descriptor Type before dispatch */
304 287
305 if (resource->type > ACPI_RSTYPE_MAX) { 288 if (resource->type > ACPI_RESOURCE_TYPE_MAX) {
306 ACPI_DEBUG_PRINT((ACPI_DB_ERROR, 289 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
307 "Invalid descriptor type (%X) in resource list\n", 290 "Invalid descriptor type (%X) in resource list\n",
308 resource->type)); 291 resource->type));
309 return_ACPI_STATUS(AE_BAD_DATA); 292 return_ACPI_STATUS(AE_BAD_DATA);
310 } 293 }
311 294
312 /* Perform the conversion, per resource type */ 295 /* Perform the conversion per resource type */
296
297 status =
298 acpi_gbl_set_resource_dispatch[resource->type] (resource,
299 ACPI_CAST_PTR
300 (union
301 aml_resource,
302 aml_buffer));
303 if (ACPI_FAILURE(status)) {
304 ACPI_REPORT_ERROR(("Could not convert resource (type %X) to AML, %s\n", resource->type, acpi_format_exception(status)));
305 return_ACPI_STATUS(status);
306 }
307
308 /* Perform final sanity check on the new AML resource descriptor */
313 309
314 status = acpi_gbl_stream_dispatch[resource->type] (resource, 310 status =
315 &buffer, 311 acpi_rs_validate_resource_length(ACPI_CAST_PTR
316 &bytes_consumed); 312 (union aml_resource,
313 aml_buffer));
317 if (ACPI_FAILURE(status)) { 314 if (ACPI_FAILURE(status)) {
318 return_ACPI_STATUS(status); 315 return_ACPI_STATUS(status);
319 } 316 }
320 317
321 /* Check for end-of-list */ 318 /* Check for end-of-list, normal exit */
322 319
323 if (resource->type == ACPI_RSTYPE_END_TAG) { 320 if (resource->type == ACPI_RESOURCE_TYPE_END_TAG) {
324 /* An End Tag indicates the end of the Resource Template */ 321 /* An End Tag indicates the end of the input Resource Template */
325 322
326 return_ACPI_STATUS(AE_OK); 323 return_ACPI_STATUS(AE_OK);
327 } 324 }
328 325
329 /* Set the Buffer to point to the next (output) resource descriptor */ 326 /* Extract the total length of the new descriptor */
327 /* Set the aml_buffer to point to the next (output) resource descriptor */
330 328
331 buffer += bytes_consumed; 329 aml_buffer +=
330 acpi_rs_get_descriptor_length(ACPI_CAST_PTR
331 (union aml_resource,
332 aml_buffer));
332 333
333 /* Point to the next input resource object */ 334 /* Point to the next input resource descriptor */
334 335
335 resource = ACPI_PTR_ADD(struct acpi_resource, 336 resource =
336 resource, resource->length); 337 ACPI_PTR_ADD(struct acpi_resource, resource,
338 resource->length);
337 } 339 }
338} 340}
generated by cgit v1.2.2 (git 2.25.0) at 2024-11-13 07:20:06 -0500