Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /******************************************************************************* |
| 2 | * |
| 3 | * Module Name: rscalc - Calculate stream and list lengths |
| 4 | * |
| 5 | ******************************************************************************/ |
| 6 | |
| 7 | /* |
| 8 | * Copyright (C) 2000 - 2005, R. Byron Moore |
| 9 | * All rights reserved. |
| 10 | * |
| 11 | * Redistribution and use in source and binary forms, with or without |
| 12 | * modification, are permitted provided that the following conditions |
| 13 | * are met: |
| 14 | * 1. Redistributions of source code must retain the above copyright |
| 15 | * notice, this list of conditions, and the following disclaimer, |
| 16 | * without modification. |
| 17 | * 2. Redistributions in binary form must reproduce at minimum a disclaimer |
| 18 | * substantially similar to the "NO WARRANTY" disclaimer below |
| 19 | * ("Disclaimer") and any redistribution must be conditioned upon |
| 20 | * including a substantially similar Disclaimer requirement for further |
| 21 | * binary redistribution. |
| 22 | * 3. Neither the names of the above-listed copyright holders nor the names |
| 23 | * of any contributors may be used to endorse or promote products derived |
| 24 | * from this software without specific prior written permission. |
| 25 | * |
| 26 | * Alternatively, this software may be distributed under the terms of the |
| 27 | * GNU General Public License ("GPL") version 2 as published by the Free |
| 28 | * Software Foundation. |
| 29 | * |
| 30 | * NO WARRANTY |
| 31 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| 32 | * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| 33 | * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR |
| 34 | * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT |
| 35 | * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| 36 | * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
| 37 | * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
| 38 | * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| 39 | * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING |
| 40 | * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
| 41 | * POSSIBILITY OF SUCH DAMAGES. |
| 42 | */ |
| 43 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 44 | #include <acpi/acpi.h> |
| 45 | #include <acpi/acresrc.h> |
| 46 | #include <acpi/amlcode.h> |
| 47 | #include <acpi/acnamesp.h> |
| 48 | |
| 49 | #define _COMPONENT ACPI_RESOURCES |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 50 | ACPI_MODULE_NAME("rscalc") |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 51 | |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 52 | /* Local prototypes */ |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 53 | static u8 acpi_rs_count_set_bits(u16 bit_field); |
| 54 | |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 55 | static acpi_size |
| 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 | |
| 61 | /******************************************************************************* |
| 62 | * |
| 63 | * FUNCTION: acpi_rs_count_set_bits |
| 64 | * |
| 65 | * PARAMETERS: bit_field - Field in which to count bits |
| 66 | * |
| 67 | * RETURN: Number of bits set within the field |
| 68 | * |
| 69 | * DESCRIPTION: Count the number of bits set in a resource field. Used for |
| 70 | * (Short descriptor) interrupt and DMA lists. |
| 71 | * |
| 72 | ******************************************************************************/ |
| 73 | |
| 74 | static u8 acpi_rs_count_set_bits(u16 bit_field) |
| 75 | { |
| 76 | u8 bits_set; |
| 77 | |
| 78 | ACPI_FUNCTION_ENTRY(); |
| 79 | |
| 80 | for (bits_set = 0; bit_field; bits_set++) { |
| 81 | /* Zero the least significant bit that is set */ |
| 82 | |
| 83 | bit_field &= (bit_field - 1); |
| 84 | } |
| 85 | |
| 86 | return (bits_set); |
| 87 | } |
| 88 | |
| 89 | /******************************************************************************* |
| 90 | * |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 91 | * FUNCTION: acpi_rs_struct_option_length |
| 92 | * |
| 93 | * PARAMETERS: resource_source - Pointer to optional descriptor field |
| 94 | * |
| 95 | * RETURN: Status |
| 96 | * |
| 97 | * DESCRIPTION: Common code to handle optional resource_source_index and |
| 98 | * resource_source fields in some Large descriptors. Used during |
| 99 | * list-to-stream conversion |
| 100 | * |
| 101 | ******************************************************************************/ |
| 102 | |
| 103 | static acpi_size |
| 104 | acpi_rs_struct_option_length(struct acpi_resource_source *resource_source) |
| 105 | { |
| 106 | ACPI_FUNCTION_ENTRY(); |
| 107 | |
| 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_size) resource_source->string_length + 1); |
| 115 | } |
| 116 | |
| 117 | return (0); |
| 118 | } |
| 119 | |
| 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 | ******************************************************************************/ |
| 135 | |
| 136 | static u32 |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 137 | acpi_rs_stream_option_length(u32 resource_length, |
| 138 | u32 minimum_aml_resource_length) |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 139 | { |
| 140 | u32 string_length = 0; |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 141 | |
| 142 | ACPI_FUNCTION_ENTRY(); |
| 143 | |
| 144 | /* |
| 145 | * The resource_source_index and resource_source are optional elements of some |
| 146 | * Large-type resource descriptors. |
| 147 | */ |
| 148 | |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 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 | */ |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 156 | if (resource_length > minimum_aml_resource_length) { |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 157 | /* Compute the length of the optional string */ |
| 158 | |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 159 | string_length = |
| 160 | resource_length - minimum_aml_resource_length - 1; |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 161 | } |
| 162 | |
| 163 | /* Round up length to 32 bits for internal structure alignment */ |
| 164 | |
| 165 | return (ACPI_ROUND_UP_to_32_bITS(string_length)); |
| 166 | } |
| 167 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 168 | /******************************************************************************* |
| 169 | * |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 170 | * FUNCTION: acpi_rs_get_aml_length |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 171 | * |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 172 | * PARAMETERS: Resource - Pointer to the resource linked list |
| 173 | * size_needed - Where the required size is returned |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | * |
| 175 | * RETURN: Status |
| 176 | * |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 177 | * DESCRIPTION: Takes a linked list of internal resource descriptors and |
| 178 | * calculates the size buffer needed to hold the corresponding |
| 179 | * external resource byte stream. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 180 | * |
| 181 | ******************************************************************************/ |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 182 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | acpi_status |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 184 | acpi_rs_get_aml_length(struct acpi_resource * resource, acpi_size * size_needed) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | { |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 186 | acpi_size aml_size_needed = 0; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 187 | acpi_size segment_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 189 | ACPI_FUNCTION_TRACE("rs_get_aml_length"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 191 | /* Traverse entire list of internal resource descriptors */ |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 192 | |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 193 | while (resource) { |
| 194 | /* Validate the descriptor type */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 195 | |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 196 | if (resource->type > ACPI_RESOURCE_TYPE_MAX) { |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 197 | return_ACPI_STATUS(AE_AML_INVALID_RESOURCE_TYPE); |
| 198 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 199 | |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 200 | /* Get the base size of the (external stream) resource descriptor */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 201 | |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 202 | segment_size = acpi_gbl_aml_resource_sizes[resource->type]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 204 | /* |
| 205 | * Augment the base size for descriptors with optional and/or |
| 206 | * variable-length fields |
| 207 | */ |
| 208 | switch (resource->type) { |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 209 | case ACPI_RESOURCE_TYPE_VENDOR: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 210 | /* |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 211 | * Vendor Defined Resource: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 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. |
| 215 | */ |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 216 | if (resource->data.vendor.byte_length > 7) { |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 217 | /* Base size of a Large resource descriptor */ |
| 218 | |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 219 | segment_size = |
| 220 | sizeof(struct aml_resource_large_header); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | } |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 222 | |
| 223 | /* Add the size of the vendor-specific data */ |
| 224 | |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 225 | segment_size += resource->data.vendor.byte_length; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 226 | break; |
| 227 | |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 228 | case ACPI_RESOURCE_TYPE_END_TAG: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 229 | /* |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 230 | * End Tag: |
| 231 | * We are done -- return the accumulated total size. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 232 | */ |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 233 | *size_needed = aml_size_needed + segment_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 234 | |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 235 | /* Normal exit */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 237 | return_ACPI_STATUS(AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 239 | case ACPI_RESOURCE_TYPE_ADDRESS16: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 240 | /* |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 241 | * 16-Bit Address Resource: |
| 242 | * Add the size of the optional resource_source info |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | */ |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 244 | segment_size += |
| 245 | acpi_rs_struct_option_length(&resource->data. |
| 246 | address16. |
| 247 | resource_source); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 248 | break; |
| 249 | |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 250 | case ACPI_RESOURCE_TYPE_ADDRESS32: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 251 | /* |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 252 | * 32-Bit Address Resource: |
| 253 | * Add the size of the optional resource_source info |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 254 | */ |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 255 | segment_size += |
| 256 | acpi_rs_struct_option_length(&resource->data. |
| 257 | address32. |
| 258 | resource_source); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 259 | break; |
| 260 | |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 261 | case ACPI_RESOURCE_TYPE_ADDRESS64: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 262 | /* |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 263 | * 64-Bit Address Resource: |
| 264 | * Add the size of the optional resource_source info |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 265 | */ |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 266 | segment_size += |
| 267 | acpi_rs_struct_option_length(&resource->data. |
| 268 | address64. |
| 269 | resource_source); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 270 | break; |
| 271 | |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 272 | case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | /* |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 274 | * Extended IRQ Resource: |
| 275 | * Add the size of each additional optional interrupt beyond the |
| 276 | * required 1 (4 bytes for each u32 interrupt number) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 277 | */ |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 278 | segment_size += (((acpi_size) |
| 279 | resource->data.extended_irq. |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 280 | interrupt_count - 1) * 4); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 281 | |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 282 | /* Add the size of the optional resource_source info */ |
| 283 | |
| 284 | segment_size += |
| 285 | acpi_rs_struct_option_length(&resource->data. |
| 286 | extended_irq. |
| 287 | resource_source); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 288 | break; |
| 289 | |
| 290 | default: |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 291 | break; |
| 292 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 293 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 294 | /* Update the total */ |
| 295 | |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 296 | aml_size_needed += segment_size; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 297 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 298 | /* Point to the next object */ |
| 299 | |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 300 | resource = ACPI_PTR_ADD(struct acpi_resource, |
| 301 | resource, resource->length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 302 | } |
| 303 | |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 304 | /* Did not find an END_TAG descriptor */ |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 305 | |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 306 | return_ACPI_STATUS(AE_AML_INVALID_RESOURCE_TYPE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 307 | } |
| 308 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 309 | /******************************************************************************* |
| 310 | * |
| 311 | * FUNCTION: acpi_rs_get_list_length |
| 312 | * |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 313 | * PARAMETERS: aml_buffer - Pointer to the resource byte stream |
| 314 | * aml_buffer_length - Size of aml_buffer |
| 315 | * size_needed - Where the size needed is returned |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | * |
| 317 | * RETURN: Status |
| 318 | * |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 319 | * DESCRIPTION: Takes an external resource byte stream and calculates the size |
| 320 | * buffer needed to hold the corresponding internal resource |
| 321 | * descriptor linked list. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | * |
| 323 | ******************************************************************************/ |
| 324 | |
| 325 | acpi_status |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 326 | acpi_rs_get_list_length(u8 * aml_buffer, |
| 327 | u32 aml_buffer_length, acpi_size * size_needed) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 328 | { |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 329 | u8 *buffer; |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 330 | struct acpi_resource_info *resource_info; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 331 | u32 buffer_size = 0; |
| 332 | u32 bytes_parsed = 0; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 333 | u8 resource_type; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 334 | u16 temp16; |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 335 | u16 resource_length; |
| 336 | u16 header_length; |
| 337 | u32 extra_struct_bytes; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 339 | ACPI_FUNCTION_TRACE("rs_get_list_length"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 340 | |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 341 | while (bytes_parsed < aml_buffer_length) { |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 342 | /* The next byte in the stream is the resource descriptor type */ |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 343 | |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 344 | resource_type = acpi_rs_get_resource_type(*aml_buffer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 346 | /* Get the base stream size and structure sizes for the descriptor */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 347 | |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 348 | resource_info = acpi_rs_get_resource_info(resource_type); |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 349 | if (!resource_info) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 350 | return_ACPI_STATUS(AE_AML_INVALID_RESOURCE_TYPE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 351 | } |
| 352 | |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 353 | /* Get the Length field from the input resource descriptor */ |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 354 | |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 355 | resource_length = |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 356 | acpi_rs_get_resource_length(ACPI_CAST_PTR |
| 357 | (union aml_resource, |
| 358 | aml_buffer)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 360 | /* Augment the size for descriptors with optional fields */ |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 361 | |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 362 | extra_struct_bytes = 0; |
| 363 | |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 364 | if (!(resource_type & ACPI_RESOURCE_NAME_LARGE)) { |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 365 | /* |
| 366 | * Small resource descriptors |
| 367 | */ |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 368 | header_length = |
| 369 | sizeof(struct aml_resource_small_header); |
| 370 | buffer = aml_buffer + header_length; |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 371 | |
| 372 | switch (resource_type) { |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 373 | case ACPI_RESOURCE_NAME_IRQ: |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 374 | /* |
| 375 | * IRQ Resource: |
| 376 | * Get the number of bits set in the IRQ word |
| 377 | */ |
| 378 | ACPI_MOVE_16_TO_16(&temp16, buffer); |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 379 | extra_struct_bytes = |
| 380 | (acpi_rs_count_set_bits(temp16) * |
| 381 | sizeof(u32)); |
| 382 | break; |
| 383 | |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 384 | case ACPI_RESOURCE_NAME_DMA: |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 385 | /* |
| 386 | * DMA Resource: |
| 387 | * Get the number of bits set in the DMA channels byte |
| 388 | */ |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 389 | ACPI_MOVE_16_TO_16(&temp16, buffer); |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 390 | extra_struct_bytes = |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 391 | (acpi_rs_count_set_bits(temp16) * |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 392 | sizeof(u32)); |
| 393 | break; |
| 394 | |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 395 | case ACPI_RESOURCE_NAME_VENDOR_SMALL: |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 396 | /* |
| 397 | * Vendor Specific Resource: |
| 398 | * Ensure a 32-bit boundary for the structure |
| 399 | */ |
| 400 | extra_struct_bytes = |
| 401 | ACPI_ROUND_UP_to_32_bITS(resource_length); |
| 402 | break; |
| 403 | |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 404 | case ACPI_RESOURCE_NAME_END_TAG: |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 405 | /* |
| 406 | * End Tag: |
| 407 | * Terminate the loop now |
| 408 | */ |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 409 | aml_buffer_length = bytes_parsed; |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 410 | break; |
| 411 | |
| 412 | default: |
| 413 | break; |
| 414 | } |
| 415 | } else { |
| 416 | /* |
| 417 | * Large resource descriptors |
| 418 | */ |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 419 | header_length = |
| 420 | sizeof(struct aml_resource_large_header); |
| 421 | buffer = aml_buffer + header_length; |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 422 | |
| 423 | switch (resource_type) { |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 424 | case ACPI_RESOURCE_NAME_VENDOR_LARGE: |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 425 | /* |
| 426 | * Vendor Defined Resource: |
| 427 | * Add vendor data and ensure a 32-bit boundary for the structure |
| 428 | */ |
| 429 | extra_struct_bytes = |
| 430 | ACPI_ROUND_UP_to_32_bITS(resource_length); |
| 431 | break; |
| 432 | |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 433 | case ACPI_RESOURCE_NAME_ADDRESS32: |
| 434 | case ACPI_RESOURCE_NAME_ADDRESS16: |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 435 | /* |
| 436 | * 32-Bit or 16-bit Address Resource: |
| 437 | * Add the size of any optional data (resource_source) |
| 438 | */ |
| 439 | extra_struct_bytes = |
| 440 | acpi_rs_stream_option_length |
| 441 | (resource_length, |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 442 | resource_info-> |
| 443 | minimum_aml_resource_length); |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 444 | break; |
| 445 | |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 446 | case ACPI_RESOURCE_NAME_EXTENDED_IRQ: |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 447 | /* |
| 448 | * Extended IRQ: |
| 449 | * Point past the interrupt_vector_flags to get the |
| 450 | * interrupt_table_length. |
| 451 | */ |
| 452 | buffer++; |
| 453 | |
| 454 | /* |
| 455 | * Add 4 bytes for each additional interrupt. Note: at least one |
| 456 | * interrupt is required and is included in the minimum |
| 457 | * descriptor size |
| 458 | */ |
| 459 | extra_struct_bytes = |
| 460 | ((*buffer - 1) * sizeof(u32)); |
| 461 | |
| 462 | /* Add the size of any optional data (resource_source) */ |
| 463 | |
| 464 | extra_struct_bytes += |
| 465 | acpi_rs_stream_option_length(resource_length |
| 466 | - |
| 467 | extra_struct_bytes, |
| 468 | resource_info-> |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 469 | minimum_aml_resource_length); |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 470 | break; |
| 471 | |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 472 | case ACPI_RESOURCE_NAME_ADDRESS64: |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 473 | /* |
| 474 | * 64-Bit Address Resource: |
| 475 | * Add the size of any optional data (resource_source) |
| 476 | * Ensure a 64-bit boundary for the structure |
| 477 | */ |
| 478 | extra_struct_bytes = |
| 479 | ACPI_ROUND_UP_to_64_bITS |
| 480 | (acpi_rs_stream_option_length |
| 481 | (resource_length, |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 482 | resource_info-> |
| 483 | minimum_aml_resource_length)); |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 484 | break; |
| 485 | |
| 486 | default: |
| 487 | break; |
| 488 | } |
| 489 | } |
| 490 | |
| 491 | /* Update the required buffer size for the internal descriptor structs */ |
| 492 | |
| 493 | temp16 = |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 494 | (u16) (resource_info->minimum_internal_struct_length + |
Robert Moore | bda663d | 2005-09-16 16:51:15 -0400 | [diff] [blame] | 495 | extra_struct_bytes); |
| 496 | buffer_size += (u32) ACPI_ALIGN_RESOURCE_SIZE(temp16); |
| 497 | |
| 498 | /* |
| 499 | * Update byte count and point to the next resource within the stream |
| 500 | * using the size of the header plus the length contained in the header |
| 501 | */ |
| 502 | temp16 = (u16) (header_length + resource_length); |
| 503 | bytes_parsed += temp16; |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 504 | aml_buffer += temp16; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 505 | } |
| 506 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 507 | /* This is the data the caller needs */ |
| 508 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 509 | *size_needed = buffer_size; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 510 | return_ACPI_STATUS(AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 511 | } |
| 512 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | /******************************************************************************* |
| 514 | * |
| 515 | * FUNCTION: acpi_rs_get_pci_routing_table_length |
| 516 | * |
| 517 | * PARAMETERS: package_object - Pointer to the package object |
| 518 | * buffer_size_needed - u32 pointer of the size buffer |
| 519 | * needed to properly return the |
| 520 | * parsed data |
| 521 | * |
| 522 | * RETURN: Status |
| 523 | * |
| 524 | * DESCRIPTION: Given a package representing a PCI routing table, this |
| 525 | * calculates the size of the corresponding linked list of |
| 526 | * descriptions. |
| 527 | * |
| 528 | ******************************************************************************/ |
| 529 | |
| 530 | acpi_status |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 531 | acpi_rs_get_pci_routing_table_length(union acpi_operand_object *package_object, |
| 532 | acpi_size * buffer_size_needed) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 534 | u32 number_of_elements; |
| 535 | acpi_size temp_size_needed = 0; |
| 536 | union acpi_operand_object **top_object_list; |
| 537 | u32 index; |
| 538 | union acpi_operand_object *package_element; |
| 539 | union acpi_operand_object **sub_object_list; |
| 540 | u8 name_found; |
| 541 | u32 table_index; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 542 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 543 | ACPI_FUNCTION_TRACE("rs_get_pci_routing_table_length"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 544 | |
| 545 | number_of_elements = package_object->package.count; |
| 546 | |
| 547 | /* |
| 548 | * Calculate the size of the return buffer. |
| 549 | * The base size is the number of elements * the sizes of the |
| 550 | * structures. Additional space for the strings is added below. |
| 551 | * The minus one is to subtract the size of the u8 Source[1] |
| 552 | * member because it is added below. |
| 553 | * |
| 554 | * But each PRT_ENTRY structure has a pointer to a string and |
| 555 | * the size of that string must be found. |
| 556 | */ |
| 557 | top_object_list = package_object->package.elements; |
| 558 | |
| 559 | for (index = 0; index < number_of_elements; index++) { |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 560 | /* Dereference the sub-package */ |
| 561 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 562 | package_element = *top_object_list; |
| 563 | |
| 564 | /* |
| 565 | * The sub_object_list will now point to an array of the |
| 566 | * four IRQ elements: Address, Pin, Source and source_index |
| 567 | */ |
| 568 | sub_object_list = package_element->package.elements; |
| 569 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 570 | /* Scan the irq_table_elements for the Source Name String */ |
| 571 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 572 | name_found = FALSE; |
| 573 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 574 | for (table_index = 0; table_index < 4 && !name_found; |
| 575 | table_index++) { |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 576 | if ((ACPI_TYPE_STRING == |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 577 | ACPI_GET_OBJECT_TYPE(*sub_object_list)) |
| 578 | || |
| 579 | ((ACPI_TYPE_LOCAL_REFERENCE == |
| 580 | ACPI_GET_OBJECT_TYPE(*sub_object_list)) |
| 581 | && ((*sub_object_list)->reference.opcode == |
| 582 | AML_INT_NAMEPATH_OP))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 583 | name_found = TRUE; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 584 | } else { |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 585 | /* Look at the next element */ |
| 586 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 587 | sub_object_list++; |
| 588 | } |
| 589 | } |
| 590 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 591 | temp_size_needed += (sizeof(struct acpi_pci_routing_table) - 4); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 592 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 593 | /* Was a String type found? */ |
| 594 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | if (name_found) { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 596 | if (ACPI_GET_OBJECT_TYPE(*sub_object_list) == |
| 597 | ACPI_TYPE_STRING) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | /* |
| 599 | * The length String.Length field does not include the |
| 600 | * terminating NULL, add 1 |
| 601 | */ |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 602 | temp_size_needed += ((acpi_size) |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 603 | (*sub_object_list)->string. |
| 604 | length + 1); |
| 605 | } else { |
Bob Moore | 50eca3e | 2005-09-30 19:03:00 -0400 | [diff] [blame^] | 606 | temp_size_needed += acpi_ns_get_pathname_length((*sub_object_list)->reference.node); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 607 | } |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 608 | } else { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | /* |
| 610 | * If no name was found, then this is a NULL, which is |
| 611 | * translated as a u32 zero. |
| 612 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 613 | temp_size_needed += sizeof(u32); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | } |
| 615 | |
| 616 | /* Round up the size since each element must be aligned */ |
| 617 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 618 | temp_size_needed = ACPI_ROUND_UP_to_64_bITS(temp_size_needed); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 619 | |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 620 | /* Point to the next union acpi_operand_object */ |
| 621 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 622 | top_object_list++; |
| 623 | } |
| 624 | |
| 625 | /* |
Robert Moore | 44f6c01 | 2005-04-18 22:49:35 -0400 | [diff] [blame] | 626 | * Adding an extra element to the end of the list, essentially a |
| 627 | * NULL terminator |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 628 | */ |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 629 | *buffer_size_needed = |
| 630 | temp_size_needed + sizeof(struct acpi_pci_routing_table); |
| 631 | return_ACPI_STATUS(AE_OK); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | } |