John Wang | 0270040 | 2019-10-06 16:34:29 +0800 | [diff] [blame] | 1 | #include <assert.h> |
| 2 | #include <endian.h> |
| 3 | #include <stdbool.h> |
| 4 | #include <stdint.h> |
| 5 | #include <stdlib.h> |
| 6 | #include <string.h> |
| 7 | |
| 8 | #include "bios.h" |
| 9 | #include "bios_table.h" |
| 10 | |
| 11 | #define POINTER_CHECK(pointer) \ |
| 12 | do { \ |
| 13 | if (pointer == NULL) \ |
| 14 | return PLDM_ERROR_INVALID_DATA; \ |
| 15 | } while (0) |
| 16 | |
| 17 | #define ATTR_TYPE_EXPECT(type, expected) \ |
| 18 | do { \ |
| 19 | if (type != expected && type != (expected | 0x80)) \ |
| 20 | return PLDM_ERROR_INVALID_DATA; \ |
| 21 | } while (0) |
| 22 | |
John Wang | 871c927 | 2019-12-09 18:02:15 +0800 | [diff] [blame] | 23 | static bool attribute_is_readonly(uint8_t attr_type) |
| 24 | { |
| 25 | return (attr_type & 0x80); |
| 26 | } |
| 27 | |
John Wang | 3ad2175 | 2019-10-06 16:42:21 +0800 | [diff] [blame] | 28 | #define BUFFER_SIZE_EXPECT(current_size, expected_size) \ |
| 29 | do { \ |
| 30 | if (current_size < expected_size) \ |
| 31 | return PLDM_ERROR_INVALID_LENGTH; \ |
| 32 | } while (0) |
| 33 | |
John Wang | dd9a628 | 2019-10-11 18:52:46 +0800 | [diff] [blame] | 34 | #define MEMBER_SIZE(type, member) sizeof(((struct type *)0)->member) |
| 35 | |
John Wang | 827c5de | 2019-11-07 18:27:27 +0800 | [diff] [blame] | 36 | static void set_errmsg(const char **errmsg, const char *msg) |
| 37 | { |
| 38 | if (errmsg != NULL) |
| 39 | *errmsg = msg; |
| 40 | } |
| 41 | |
John Wang | dd9a628 | 2019-10-11 18:52:46 +0800 | [diff] [blame] | 42 | static uint16_t get_bios_string_handle() |
| 43 | { |
| 44 | static uint16_t handle = 0; |
| 45 | assert(handle != UINT16_MAX); |
| 46 | |
| 47 | return handle++; |
| 48 | } |
| 49 | |
| 50 | size_t pldm_bios_table_string_entry_encode_length(uint16_t string_length) |
| 51 | { |
| 52 | return sizeof(struct pldm_bios_string_table_entry) - |
| 53 | MEMBER_SIZE(pldm_bios_string_table_entry, name) + string_length; |
| 54 | } |
| 55 | |
| 56 | void pldm_bios_table_string_entry_encode(void *entry, size_t entry_length, |
| 57 | const char *str, uint16_t str_length) |
| 58 | { |
| 59 | size_t length = pldm_bios_table_string_entry_encode_length(str_length); |
| 60 | assert(length <= entry_length); |
| 61 | struct pldm_bios_string_table_entry *string_entry = entry; |
| 62 | string_entry->string_handle = htole16(get_bios_string_handle()); |
| 63 | string_entry->string_length = htole16(str_length); |
| 64 | memcpy(string_entry->name, str, str_length); |
| 65 | } |
| 66 | |
| 67 | int pldm_bios_table_string_entry_encode_check(void *entry, size_t entry_length, |
| 68 | const char *str, |
| 69 | uint16_t str_length) |
| 70 | { |
| 71 | if (str_length == 0) |
| 72 | return PLDM_ERROR_INVALID_DATA; |
| 73 | POINTER_CHECK(entry); |
| 74 | POINTER_CHECK(str); |
| 75 | size_t length = pldm_bios_table_string_entry_encode_length(str_length); |
| 76 | BUFFER_SIZE_EXPECT(entry_length, length); |
| 77 | pldm_bios_table_string_entry_encode(entry, entry_length, str, |
| 78 | str_length); |
| 79 | return PLDM_SUCCESS; |
| 80 | } |
| 81 | |
| 82 | uint16_t pldm_bios_table_string_entry_decode_handle( |
| 83 | const struct pldm_bios_string_table_entry *entry) |
| 84 | { |
| 85 | return le16toh(entry->string_handle); |
| 86 | } |
| 87 | |
| 88 | uint16_t pldm_bios_table_string_entry_decode_string_length( |
| 89 | const struct pldm_bios_string_table_entry *entry) |
| 90 | { |
| 91 | return le16toh(entry->string_length); |
| 92 | } |
| 93 | |
| 94 | uint16_t pldm_bios_table_string_entry_decode_string( |
| 95 | const struct pldm_bios_string_table_entry *entry, char *buffer, size_t size) |
| 96 | { |
| 97 | uint16_t length = |
| 98 | pldm_bios_table_string_entry_decode_string_length(entry); |
John Wang | 88a349c | 2020-01-20 14:19:49 +0800 | [diff] [blame] | 99 | length = length < (size - 1) ? length : (size - 1); |
John Wang | dd9a628 | 2019-10-11 18:52:46 +0800 | [diff] [blame] | 100 | memcpy(buffer, entry->name, length); |
| 101 | buffer[length] = 0; |
| 102 | return length; |
| 103 | } |
| 104 | |
| 105 | int pldm_bios_table_string_entry_decode_string_check( |
| 106 | const struct pldm_bios_string_table_entry *entry, char *buffer, size_t size) |
| 107 | { |
| 108 | POINTER_CHECK(entry); |
| 109 | POINTER_CHECK(buffer); |
| 110 | size_t length = |
| 111 | pldm_bios_table_string_entry_decode_string_length(entry); |
| 112 | BUFFER_SIZE_EXPECT(size, length + 1); |
| 113 | pldm_bios_table_string_entry_decode_string(entry, buffer, size); |
| 114 | return PLDM_SUCCESS; |
| 115 | } |
| 116 | |
| 117 | static size_t string_table_entry_length(const void *table_entry) |
| 118 | { |
| 119 | const struct pldm_bios_string_table_entry *entry = table_entry; |
| 120 | return sizeof(*entry) - sizeof(entry->name) + |
| 121 | pldm_bios_table_string_entry_decode_string_length(entry); |
| 122 | } |
| 123 | |
John Wang | ccc0455 | 2019-10-14 14:28:25 +0800 | [diff] [blame] | 124 | static uint16_t get_bios_attr_handle() |
| 125 | { |
| 126 | static uint16_t handle = 0; |
| 127 | assert(handle != UINT16_MAX); |
| 128 | |
| 129 | return handle++; |
| 130 | } |
| 131 | |
| 132 | static void attr_table_entry_encode_header(void *entry, size_t length, |
| 133 | uint8_t attr_type, |
| 134 | uint16_t string_handle) |
| 135 | { |
| 136 | struct pldm_bios_attr_table_entry *attr_entry = entry; |
| 137 | assert(sizeof(*attr_entry) <= length); |
| 138 | attr_entry->attr_handle = htole16(get_bios_attr_handle()); |
| 139 | attr_entry->attr_type = attr_type; |
| 140 | attr_entry->string_handle = htole16(string_handle); |
| 141 | } |
| 142 | |
John Wang | b0da7a0 | 2020-01-07 16:55:00 +0800 | [diff] [blame] | 143 | uint16_t pldm_bios_table_attr_entry_decode_attribute_handle( |
| 144 | const struct pldm_bios_attr_table_entry *entry) |
| 145 | { |
| 146 | return le16toh(entry->attr_handle); |
| 147 | } |
| 148 | |
| 149 | uint16_t pldm_bios_table_attr_entry_decode_string_handle( |
| 150 | const struct pldm_bios_attr_table_entry *entry) |
| 151 | { |
| 152 | return le16toh(entry->string_handle); |
| 153 | } |
| 154 | |
John Wang | ccc0455 | 2019-10-14 14:28:25 +0800 | [diff] [blame] | 155 | size_t pldm_bios_table_attr_entry_enum_encode_length(uint8_t pv_num, |
| 156 | uint8_t def_num) |
| 157 | { |
| 158 | return sizeof(struct pldm_bios_attr_table_entry) - |
| 159 | MEMBER_SIZE(pldm_bios_attr_table_entry, metadata) + |
| 160 | sizeof(pv_num) + pv_num * sizeof(uint16_t) + sizeof(def_num) + |
| 161 | def_num; |
| 162 | } |
| 163 | |
| 164 | void pldm_bios_table_attr_entry_enum_encode( |
| 165 | void *entry, size_t entry_length, |
| 166 | const struct pldm_bios_table_attr_entry_enum_info *info) |
| 167 | { |
| 168 | size_t length = pldm_bios_table_attr_entry_enum_encode_length( |
| 169 | info->pv_num, info->def_num); |
| 170 | assert(length <= entry_length); |
| 171 | uint8_t attr_type = info->read_only ? PLDM_BIOS_ENUMERATION_READ_ONLY |
| 172 | : PLDM_BIOS_ENUMERATION; |
| 173 | attr_table_entry_encode_header(entry, entry_length, attr_type, |
| 174 | info->name_handle); |
| 175 | struct pldm_bios_attr_table_entry *attr_entry = entry; |
| 176 | attr_entry->metadata[0] = info->pv_num; |
| 177 | uint16_t *pv_hdls = |
| 178 | (uint16_t *)(attr_entry->metadata + 1 /* sizeof(pv num) */); |
| 179 | size_t i; |
| 180 | for (i = 0; i < info->pv_num; i++) |
| 181 | pv_hdls[i] = htole16(info->pv_handle[i]); |
| 182 | attr_entry->metadata[1 + info->pv_num * sizeof(uint16_t)] = |
| 183 | info->def_num; |
| 184 | memcpy(attr_entry->metadata + 1 /* sizeof(pv num) */ + |
| 185 | info->pv_num * sizeof(uint16_t) + 1 /* sizeof(def num)*/, |
| 186 | info->def_index, info->def_num); |
| 187 | } |
| 188 | |
| 189 | int pldm_bios_table_attr_entry_enum_encode_check( |
| 190 | void *entry, size_t entry_length, |
| 191 | const struct pldm_bios_table_attr_entry_enum_info *info) |
| 192 | { |
| 193 | POINTER_CHECK(entry); |
| 194 | POINTER_CHECK(info); |
| 195 | size_t length = pldm_bios_table_attr_entry_enum_encode_length( |
| 196 | info->pv_num, info->def_num); |
| 197 | BUFFER_SIZE_EXPECT(entry_length, length); |
| 198 | pldm_bios_table_attr_entry_enum_encode(entry, entry_length, info); |
| 199 | return PLDM_SUCCESS; |
| 200 | } |
| 201 | |
John Wang | dd9a628 | 2019-10-11 18:52:46 +0800 | [diff] [blame] | 202 | #define ATTR_TYPE_EXPECT(type, expected) \ |
| 203 | do { \ |
| 204 | if (type != expected && type != (expected | 0x80)) \ |
| 205 | return PLDM_ERROR_INVALID_DATA; \ |
| 206 | } while (0) |
| 207 | |
John Wang | 0270040 | 2019-10-06 16:34:29 +0800 | [diff] [blame] | 208 | uint8_t pldm_bios_table_attr_entry_enum_decode_pv_num( |
| 209 | const struct pldm_bios_attr_table_entry *entry) |
| 210 | { |
| 211 | return entry->metadata[0]; |
| 212 | } |
| 213 | |
| 214 | int pldm_bios_table_attr_entry_enum_decode_pv_num_check( |
| 215 | const struct pldm_bios_attr_table_entry *entry, uint8_t *pv_num) |
| 216 | { |
| 217 | POINTER_CHECK(entry); |
| 218 | POINTER_CHECK(pv_num); |
| 219 | ATTR_TYPE_EXPECT(entry->attr_type, PLDM_BIOS_ENUMERATION); |
| 220 | *pv_num = pldm_bios_table_attr_entry_enum_decode_pv_num(entry); |
| 221 | return PLDM_SUCCESS; |
| 222 | } |
| 223 | |
| 224 | uint8_t pldm_bios_table_attr_entry_enum_decode_def_num( |
| 225 | const struct pldm_bios_attr_table_entry *entry) |
| 226 | { |
| 227 | uint8_t pv_num = pldm_bios_table_attr_entry_enum_decode_pv_num(entry); |
| 228 | return entry->metadata[sizeof(uint8_t) /* pv_num */ + |
| 229 | sizeof(uint16_t) * pv_num]; |
| 230 | } |
| 231 | |
| 232 | int pldm_bios_table_attr_entry_enum_decode_def_num_check( |
| 233 | const struct pldm_bios_attr_table_entry *entry, uint8_t *def_num) |
| 234 | { |
| 235 | POINTER_CHECK(entry); |
| 236 | POINTER_CHECK(def_num); |
| 237 | ATTR_TYPE_EXPECT(entry->attr_type, PLDM_BIOS_ENUMERATION); |
| 238 | *def_num = pldm_bios_table_attr_entry_enum_decode_def_num(entry); |
| 239 | return PLDM_SUCCESS; |
| 240 | } |
| 241 | |
John Wang | 3ad2175 | 2019-10-06 16:42:21 +0800 | [diff] [blame] | 242 | uint8_t pldm_bios_table_attr_entry_enum_decode_pv_hdls( |
| 243 | const struct pldm_bios_attr_table_entry *entry, uint16_t *pv_hdls, |
| 244 | uint8_t pv_num) |
| 245 | { |
| 246 | uint8_t num = pldm_bios_table_attr_entry_enum_decode_pv_num(entry); |
| 247 | num = num < pv_num ? num : pv_num; |
| 248 | size_t i; |
| 249 | for (i = 0; i < num; i++) { |
| 250 | uint16_t *hdl = (uint16_t *)(entry->metadata + sizeof(uint8_t) + |
| 251 | i * sizeof(uint16_t)); |
| 252 | pv_hdls[i] = le16toh(*hdl); |
| 253 | } |
| 254 | return num; |
| 255 | } |
| 256 | |
| 257 | int pldm_bios_table_attr_entry_enum_decode_pv_hdls_check( |
| 258 | const struct pldm_bios_attr_table_entry *entry, uint16_t *pv_hdls, |
| 259 | uint8_t pv_num) |
| 260 | { |
| 261 | POINTER_CHECK(entry); |
| 262 | POINTER_CHECK(pv_hdls); |
| 263 | ATTR_TYPE_EXPECT(entry->attr_type, PLDM_BIOS_ENUMERATION); |
| 264 | uint8_t num = pldm_bios_table_attr_entry_enum_decode_pv_num(entry); |
| 265 | if (num != pv_num) |
| 266 | return PLDM_ERROR_INVALID_DATA; |
| 267 | pldm_bios_table_attr_entry_enum_decode_pv_hdls(entry, pv_hdls, pv_num); |
| 268 | return PLDM_SUCCESS; |
| 269 | } |
| 270 | |
John Wang | 0270040 | 2019-10-06 16:34:29 +0800 | [diff] [blame] | 271 | /** @brief Get length of an enum attribute entry |
| 272 | */ |
John Wang | 49484a1 | 2019-12-02 14:21:53 +0800 | [diff] [blame] | 273 | static size_t attr_table_entry_length_enum(const void *entry) |
John Wang | 0270040 | 2019-10-06 16:34:29 +0800 | [diff] [blame] | 274 | { |
| 275 | uint8_t pv_num = pldm_bios_table_attr_entry_enum_decode_pv_num(entry); |
| 276 | uint8_t def_num = pldm_bios_table_attr_entry_enum_decode_def_num(entry); |
John Wang | ccc0455 | 2019-10-14 14:28:25 +0800 | [diff] [blame] | 277 | return pldm_bios_table_attr_entry_enum_encode_length(pv_num, def_num); |
John Wang | 0270040 | 2019-10-06 16:34:29 +0800 | [diff] [blame] | 278 | } |
| 279 | |
John Wang | ccc0455 | 2019-10-14 14:28:25 +0800 | [diff] [blame] | 280 | struct attr_table_string_entry_fields { |
| 281 | uint8_t string_type; |
| 282 | uint16_t min_length; |
| 283 | uint16_t max_length; |
| 284 | uint16_t def_length; |
| 285 | uint8_t def_string[1]; |
| 286 | } __attribute__((packed)); |
| 287 | |
| 288 | size_t pldm_bios_table_attr_entry_string_encode_length(uint16_t def_str_len) |
| 289 | { |
| 290 | return sizeof(struct pldm_bios_attr_table_entry) - |
| 291 | MEMBER_SIZE(pldm_bios_attr_table_entry, metadata) + |
| 292 | sizeof(struct attr_table_string_entry_fields) - |
| 293 | MEMBER_SIZE(attr_table_string_entry_fields, def_string) + |
| 294 | def_str_len; |
| 295 | } |
| 296 | |
| 297 | void pldm_bios_table_attr_entry_string_encode( |
| 298 | void *entry, size_t entry_length, |
| 299 | const struct pldm_bios_table_attr_entry_string_info *info) |
| 300 | { |
| 301 | size_t length = |
| 302 | pldm_bios_table_attr_entry_string_encode_length(info->def_length); |
| 303 | assert(length <= entry_length); |
| 304 | uint8_t attr_type = |
| 305 | info->read_only ? PLDM_BIOS_STRING_READ_ONLY : PLDM_BIOS_STRING; |
| 306 | attr_table_entry_encode_header(entry, entry_length, attr_type, |
| 307 | info->name_handle); |
| 308 | struct pldm_bios_attr_table_entry *attr_entry = entry; |
| 309 | struct attr_table_string_entry_fields *attr_fields = |
| 310 | (struct attr_table_string_entry_fields *)attr_entry->metadata; |
| 311 | attr_fields->string_type = info->string_type; |
| 312 | attr_fields->min_length = htole16(info->min_length); |
| 313 | attr_fields->max_length = htole16(info->max_length); |
| 314 | attr_fields->def_length = htole16(info->def_length); |
| 315 | if (info->def_length != 0 && info->def_string != NULL) |
| 316 | memcpy(attr_fields->def_string, info->def_string, |
| 317 | info->def_length); |
| 318 | } |
| 319 | |
John Wang | 827c5de | 2019-11-07 18:27:27 +0800 | [diff] [blame] | 320 | #define PLDM_STRING_TYPE_MAX 5 |
| 321 | #define PLDM_STRING_TYPE_VENDOR 0xff |
| 322 | |
| 323 | int pldm_bios_table_attr_entry_string_info_check( |
| 324 | const struct pldm_bios_table_attr_entry_string_info *info, |
| 325 | const char **errmsg) |
| 326 | { |
| 327 | if (info->min_length > info->max_length) { |
| 328 | set_errmsg(errmsg, "MinimumStingLength should not be greater " |
| 329 | "than MaximumStringLength"); |
| 330 | return PLDM_ERROR_INVALID_DATA; |
| 331 | } |
| 332 | if (info->min_length == info->max_length && |
| 333 | info->def_length != info->min_length) { |
| 334 | set_errmsg(errmsg, "Wrong DefaultStringLength"); |
| 335 | return PLDM_ERROR_INVALID_DATA; |
| 336 | } |
| 337 | if (info->def_length > info->max_length || |
| 338 | info->def_length < info->min_length) { |
| 339 | set_errmsg(errmsg, "Wrong DefaultStringLength"); |
| 340 | return PLDM_ERROR_INVALID_DATA; |
| 341 | } |
| 342 | if (info->string_type > PLDM_STRING_TYPE_MAX && |
| 343 | info->string_type != PLDM_STRING_TYPE_VENDOR) { |
| 344 | set_errmsg(errmsg, "Wrong StringType"); |
| 345 | return PLDM_ERROR_INVALID_DATA; |
| 346 | } |
| 347 | if (info->def_length != strlen(info->def_string)) { |
| 348 | set_errmsg(errmsg, "Length of DefaultString should be equal to " |
| 349 | "DefaultStringLength"); |
| 350 | return PLDM_ERROR_INVALID_DATA; |
| 351 | } |
| 352 | |
| 353 | return PLDM_SUCCESS; |
| 354 | } |
| 355 | |
John Wang | ccc0455 | 2019-10-14 14:28:25 +0800 | [diff] [blame] | 356 | int pldm_bios_table_attr_entry_string_encode_check( |
| 357 | void *entry, size_t entry_length, |
| 358 | const struct pldm_bios_table_attr_entry_string_info *info) |
| 359 | { |
| 360 | POINTER_CHECK(entry); |
| 361 | POINTER_CHECK(info); |
| 362 | size_t length = |
| 363 | pldm_bios_table_attr_entry_string_encode_length(info->def_length); |
| 364 | BUFFER_SIZE_EXPECT(entry_length, length); |
John Wang | 827c5de | 2019-11-07 18:27:27 +0800 | [diff] [blame] | 365 | if (pldm_bios_table_attr_entry_string_info_check(info, NULL) != |
| 366 | PLDM_SUCCESS) |
John Wang | ccc0455 | 2019-10-14 14:28:25 +0800 | [diff] [blame] | 367 | return PLDM_ERROR_INVALID_DATA; |
| 368 | pldm_bios_table_attr_entry_string_encode(entry, entry_length, info); |
| 369 | return PLDM_SUCCESS; |
| 370 | } |
John Wang | 0270040 | 2019-10-06 16:34:29 +0800 | [diff] [blame] | 371 | |
| 372 | uint16_t pldm_bios_table_attr_entry_string_decode_def_string_length( |
| 373 | const struct pldm_bios_attr_table_entry *entry) |
| 374 | { |
John Wang | ccc0455 | 2019-10-14 14:28:25 +0800 | [diff] [blame] | 375 | struct attr_table_string_entry_fields *fields = |
| 376 | (struct attr_table_string_entry_fields *)entry->metadata; |
| 377 | return le16toh(fields->def_length); |
John Wang | 0270040 | 2019-10-06 16:34:29 +0800 | [diff] [blame] | 378 | } |
| 379 | |
| 380 | int pldm_bios_table_attr_entry_string_decode_def_string_length_check( |
| 381 | const struct pldm_bios_attr_table_entry *entry, uint16_t *def_string_length) |
| 382 | { |
| 383 | POINTER_CHECK(entry); |
| 384 | POINTER_CHECK(def_string_length); |
| 385 | ATTR_TYPE_EXPECT(entry->attr_type, PLDM_BIOS_STRING); |
| 386 | *def_string_length = |
| 387 | pldm_bios_table_attr_entry_string_decode_def_string_length(entry); |
| 388 | return PLDM_SUCCESS; |
| 389 | } |
| 390 | |
John Wang | b0da7a0 | 2020-01-07 16:55:00 +0800 | [diff] [blame] | 391 | uint8_t pldm_bios_table_attr_entry_string_decode_string_type( |
| 392 | const struct pldm_bios_attr_table_entry *entry) |
| 393 | { |
| 394 | struct attr_table_string_entry_fields *fields = |
| 395 | (struct attr_table_string_entry_fields *)entry->metadata; |
| 396 | return fields->string_type; |
| 397 | } |
| 398 | |
John Wang | 0270040 | 2019-10-06 16:34:29 +0800 | [diff] [blame] | 399 | /** @brief Get length of a string attribute entry |
| 400 | */ |
John Wang | 49484a1 | 2019-12-02 14:21:53 +0800 | [diff] [blame] | 401 | static size_t attr_table_entry_length_string(const void *entry) |
John Wang | 0270040 | 2019-10-06 16:34:29 +0800 | [diff] [blame] | 402 | { |
John Wang | ccc0455 | 2019-10-14 14:28:25 +0800 | [diff] [blame] | 403 | uint16_t def_str_len = |
John Wang | 0270040 | 2019-10-06 16:34:29 +0800 | [diff] [blame] | 404 | pldm_bios_table_attr_entry_string_decode_def_string_length(entry); |
John Wang | ccc0455 | 2019-10-14 14:28:25 +0800 | [diff] [blame] | 405 | return pldm_bios_table_attr_entry_string_encode_length(def_str_len); |
John Wang | 0270040 | 2019-10-06 16:34:29 +0800 | [diff] [blame] | 406 | } |
| 407 | |
John Wang | ca23082 | 2019-10-16 11:39:27 +0800 | [diff] [blame] | 408 | struct attr_table_integer_entry_fields { |
| 409 | uint64_t lower_bound; |
| 410 | uint64_t upper_bound; |
| 411 | uint32_t scalar_increment; |
| 412 | uint64_t default_value; |
| 413 | } __attribute__((packed)); |
| 414 | |
| 415 | size_t pldm_bios_table_attr_entry_integer_encode_length() |
| 416 | { |
| 417 | return sizeof(struct pldm_bios_attr_table_entry) - 1 + |
| 418 | sizeof(struct attr_table_integer_entry_fields); |
| 419 | } |
| 420 | |
| 421 | void pldm_bios_table_attr_entry_integer_encode( |
| 422 | void *entry, size_t entry_length, |
| 423 | const struct pldm_bios_table_attr_entry_integer_info *info) |
| 424 | { |
| 425 | size_t length = pldm_bios_table_attr_entry_integer_encode_length(); |
| 426 | assert(length <= entry_length); |
| 427 | uint8_t attr_type = |
| 428 | info->read_only ? PLDM_BIOS_INTEGER_READ_ONLY : PLDM_BIOS_INTEGER; |
| 429 | attr_table_entry_encode_header(entry, entry_length, attr_type, |
| 430 | info->name_handle); |
| 431 | struct pldm_bios_attr_table_entry *attr_entry = entry; |
| 432 | struct attr_table_integer_entry_fields *attr_fields = |
| 433 | (struct attr_table_integer_entry_fields *)attr_entry->metadata; |
| 434 | attr_fields->lower_bound = htole64(info->lower_bound); |
| 435 | attr_fields->upper_bound = htole64(info->upper_bound); |
| 436 | attr_fields->scalar_increment = htole32(info->scalar_increment); |
| 437 | attr_fields->default_value = htole64(info->default_value); |
| 438 | } |
| 439 | |
John Wang | 827c5de | 2019-11-07 18:27:27 +0800 | [diff] [blame] | 440 | int pldm_bios_table_attr_entry_integer_info_check( |
| 441 | const struct pldm_bios_table_attr_entry_integer_info *info, |
| 442 | const char **errmsg) |
| 443 | { |
| 444 | if (info->lower_bound == info->upper_bound) { |
| 445 | if (info->default_value != info->lower_bound) { |
| 446 | set_errmsg(errmsg, "Wrong DefaultValue"); |
| 447 | return PLDM_ERROR_INVALID_DATA; |
| 448 | } |
| 449 | if (info->scalar_increment != 0) { |
| 450 | set_errmsg(errmsg, "Wrong ScalarIncrement"); |
| 451 | return PLDM_ERROR_INVALID_DATA; |
| 452 | } |
| 453 | return PLDM_SUCCESS; |
| 454 | } |
| 455 | if (info->lower_bound > info->upper_bound) { |
| 456 | set_errmsg(errmsg, |
| 457 | "LowerBound should not be greater than UpperBound"); |
| 458 | return PLDM_ERROR_INVALID_DATA; |
| 459 | } |
| 460 | if (info->default_value > info->upper_bound || |
| 461 | info->default_value < info->lower_bound) { |
| 462 | set_errmsg(errmsg, "Wrong DefaultValue"); |
| 463 | return PLDM_ERROR_INVALID_DATA; |
| 464 | } |
| 465 | if (info->scalar_increment == 0) { |
| 466 | set_errmsg(errmsg, "ScalarIncrement should not be zero when " |
| 467 | "lower_bound != upper_bound"); |
| 468 | return PLDM_ERROR_INVALID_DATA; |
| 469 | } |
| 470 | if ((info->default_value - info->lower_bound) % |
| 471 | info->scalar_increment != |
| 472 | 0) { |
| 473 | set_errmsg(errmsg, "Wrong DefaultValue or ScalarIncrement"); |
| 474 | return PLDM_ERROR_INVALID_DATA; |
| 475 | } |
| 476 | return PLDM_SUCCESS; |
| 477 | } |
| 478 | |
John Wang | ca23082 | 2019-10-16 11:39:27 +0800 | [diff] [blame] | 479 | int pldm_bios_table_attr_entry_integer_encode_check( |
| 480 | void *entry, size_t entry_length, |
| 481 | const struct pldm_bios_table_attr_entry_integer_info *info) |
| 482 | { |
| 483 | POINTER_CHECK(entry); |
| 484 | POINTER_CHECK(info); |
| 485 | size_t length = pldm_bios_table_attr_entry_integer_encode_length(); |
| 486 | BUFFER_SIZE_EXPECT(entry_length, length); |
John Wang | 827c5de | 2019-11-07 18:27:27 +0800 | [diff] [blame] | 487 | if (pldm_bios_table_attr_entry_integer_info_check(info, NULL) != |
| 488 | PLDM_SUCCESS) |
John Wang | ca23082 | 2019-10-16 11:39:27 +0800 | [diff] [blame] | 489 | return PLDM_ERROR_INVALID_DATA; |
| 490 | pldm_bios_table_attr_entry_integer_encode(entry, entry_length, info); |
| 491 | return PLDM_SUCCESS; |
| 492 | } |
| 493 | |
John Wang | 49484a1 | 2019-12-02 14:21:53 +0800 | [diff] [blame] | 494 | static size_t attr_table_entry_length_integer(const void *entry) |
John Wang | ca23082 | 2019-10-16 11:39:27 +0800 | [diff] [blame] | 495 | { |
| 496 | (void)entry; |
| 497 | return pldm_bios_table_attr_entry_integer_encode_length(); |
| 498 | } |
| 499 | |
John Wang | 49484a1 | 2019-12-02 14:21:53 +0800 | [diff] [blame] | 500 | struct table_entry_length { |
John Wang | 0270040 | 2019-10-06 16:34:29 +0800 | [diff] [blame] | 501 | uint8_t attr_type; |
John Wang | 49484a1 | 2019-12-02 14:21:53 +0800 | [diff] [blame] | 502 | size_t (*entry_length_handler)(const void *); |
John Wang | 0270040 | 2019-10-06 16:34:29 +0800 | [diff] [blame] | 503 | }; |
| 504 | |
John Wang | 49484a1 | 2019-12-02 14:21:53 +0800 | [diff] [blame] | 505 | #define ARRAY_SIZE(a) (sizeof(a) / sizeof(a[0])) |
| 506 | |
John Wang | b6333cb | 2019-12-10 09:43:42 +0800 | [diff] [blame] | 507 | static const struct table_entry_length *find_table_entry_length_by_type( |
| 508 | uint8_t attr_type, const struct table_entry_length *handlers, size_t count) |
John Wang | 49484a1 | 2019-12-02 14:21:53 +0800 | [diff] [blame] | 509 | { |
| 510 | size_t i; |
| 511 | for (i = 0; i < count; i++) { |
| 512 | if (attr_type == handlers[i].attr_type) |
| 513 | return &handlers[i]; |
| 514 | } |
| 515 | return NULL; |
| 516 | } |
| 517 | |
John Wang | b6333cb | 2019-12-10 09:43:42 +0800 | [diff] [blame] | 518 | static const struct table_entry_length attr_table_entries[] = { |
John Wang | 0270040 | 2019-10-06 16:34:29 +0800 | [diff] [blame] | 519 | {.attr_type = PLDM_BIOS_ENUMERATION, |
| 520 | .entry_length_handler = attr_table_entry_length_enum}, |
| 521 | {.attr_type = PLDM_BIOS_ENUMERATION_READ_ONLY, |
| 522 | .entry_length_handler = attr_table_entry_length_enum}, |
| 523 | {.attr_type = PLDM_BIOS_STRING, |
| 524 | .entry_length_handler = attr_table_entry_length_string}, |
| 525 | {.attr_type = PLDM_BIOS_STRING_READ_ONLY, |
| 526 | .entry_length_handler = attr_table_entry_length_string}, |
John Wang | ca23082 | 2019-10-16 11:39:27 +0800 | [diff] [blame] | 527 | {.attr_type = PLDM_BIOS_INTEGER, |
| 528 | .entry_length_handler = attr_table_entry_length_integer}, |
| 529 | {.attr_type = PLDM_BIOS_INTEGER_READ_ONLY, |
| 530 | .entry_length_handler = attr_table_entry_length_integer}, |
John Wang | 0270040 | 2019-10-06 16:34:29 +0800 | [diff] [blame] | 531 | }; |
| 532 | |
John Wang | 0270040 | 2019-10-06 16:34:29 +0800 | [diff] [blame] | 533 | static size_t attr_table_entry_length(const void *table_entry) |
| 534 | { |
| 535 | const struct pldm_bios_attr_table_entry *entry = table_entry; |
John Wang | b6333cb | 2019-12-10 09:43:42 +0800 | [diff] [blame] | 536 | const struct table_entry_length *attr_table_entry = |
John Wang | 49484a1 | 2019-12-02 14:21:53 +0800 | [diff] [blame] | 537 | find_table_entry_length_by_type(entry->attr_type, |
| 538 | attr_table_entries, |
| 539 | ARRAY_SIZE(attr_table_entries)); |
John Wang | 0270040 | 2019-10-06 16:34:29 +0800 | [diff] [blame] | 540 | assert(attr_table_entry != NULL); |
| 541 | assert(attr_table_entry->entry_length_handler != NULL); |
| 542 | |
| 543 | return attr_table_entry->entry_length_handler(entry); |
| 544 | } |
| 545 | |
John Wang | b0da7a0 | 2020-01-07 16:55:00 +0800 | [diff] [blame] | 546 | uint16_t pldm_bios_table_attr_value_entry_decode_attribute_handle( |
| 547 | const struct pldm_bios_attr_val_table_entry *entry) |
| 548 | { |
| 549 | return le16toh(entry->attr_handle); |
| 550 | } |
| 551 | |
| 552 | uint8_t pldm_bios_table_attr_value_entry_decode_attribute_type( |
| 553 | const struct pldm_bios_attr_val_table_entry *entry) |
| 554 | { |
| 555 | return entry->attr_type; |
| 556 | } |
| 557 | |
John Wang | 3ad2175 | 2019-10-06 16:42:21 +0800 | [diff] [blame] | 558 | size_t pldm_bios_table_attr_value_entry_encode_enum_length(uint8_t count) |
| 559 | { |
| 560 | return sizeof(struct pldm_bios_attr_val_table_entry) - 1 + |
| 561 | sizeof(count) + count; |
| 562 | } |
| 563 | |
| 564 | void pldm_bios_table_attr_value_entry_encode_enum( |
| 565 | void *entry, size_t entry_length, uint16_t attr_handle, uint8_t attr_type, |
| 566 | uint8_t count, uint8_t *handles) |
| 567 | { |
| 568 | size_t length = |
| 569 | pldm_bios_table_attr_value_entry_encode_enum_length(count); |
| 570 | assert(length <= entry_length); |
| 571 | |
| 572 | struct pldm_bios_attr_val_table_entry *table_entry = entry; |
| 573 | table_entry->attr_handle = htole16(attr_handle); |
| 574 | table_entry->attr_type = attr_type; |
| 575 | table_entry->value[0] = count; |
| 576 | if (count != 0) |
| 577 | memcpy(&table_entry->value[1], handles, count); |
| 578 | } |
| 579 | |
John Wang | 49484a1 | 2019-12-02 14:21:53 +0800 | [diff] [blame] | 580 | uint8_t pldm_bios_table_attr_value_entry_enum_decode_number( |
| 581 | const struct pldm_bios_attr_val_table_entry *entry) |
| 582 | { |
| 583 | return entry->value[0]; |
| 584 | } |
| 585 | |
John Wang | b0da7a0 | 2020-01-07 16:55:00 +0800 | [diff] [blame] | 586 | uint8_t pldm_bios_table_attr_value_entry_enum_decode_handles( |
| 587 | const struct pldm_bios_attr_val_table_entry *entry, uint8_t *handles, |
| 588 | uint8_t number) |
| 589 | { |
| 590 | uint8_t curr_num = |
| 591 | pldm_bios_table_attr_value_entry_enum_decode_number(entry); |
| 592 | number = number < curr_num ? number : curr_num; |
| 593 | memcpy(handles, &entry->value[1], number); |
| 594 | |
| 595 | return number; |
| 596 | } |
| 597 | |
John Wang | 3ad2175 | 2019-10-06 16:42:21 +0800 | [diff] [blame] | 598 | int pldm_bios_table_attr_value_entry_encode_enum_check( |
| 599 | void *entry, size_t entry_length, uint16_t attr_handle, uint8_t attr_type, |
| 600 | uint8_t count, uint8_t *handles) |
| 601 | { |
| 602 | POINTER_CHECK(entry); |
| 603 | if (count != 0 && handles == NULL) |
| 604 | return PLDM_ERROR_INVALID_DATA; |
| 605 | ATTR_TYPE_EXPECT(attr_type, PLDM_BIOS_ENUMERATION); |
| 606 | size_t length = |
| 607 | pldm_bios_table_attr_value_entry_encode_enum_length(count); |
| 608 | BUFFER_SIZE_EXPECT(entry_length, length); |
| 609 | pldm_bios_table_attr_value_entry_encode_enum( |
| 610 | entry, entry_length, attr_handle, attr_type, count, handles); |
| 611 | return PLDM_SUCCESS; |
| 612 | } |
| 613 | |
John Wang | 49484a1 | 2019-12-02 14:21:53 +0800 | [diff] [blame] | 614 | static size_t attr_value_table_entry_length_enum(const void *entry) |
| 615 | { |
| 616 | uint8_t number = |
| 617 | pldm_bios_table_attr_value_entry_enum_decode_number(entry); |
| 618 | return pldm_bios_table_attr_value_entry_encode_enum_length(number); |
| 619 | } |
| 620 | |
John Wang | 3ad2175 | 2019-10-06 16:42:21 +0800 | [diff] [blame] | 621 | size_t |
| 622 | pldm_bios_table_attr_value_entry_encode_string_length(uint16_t string_length) |
| 623 | { |
| 624 | return sizeof(struct pldm_bios_attr_val_table_entry) - 1 + |
| 625 | sizeof(string_length) + string_length; |
| 626 | } |
| 627 | |
| 628 | void pldm_bios_table_attr_value_entry_encode_string( |
| 629 | void *entry, size_t entry_length, uint16_t attr_handle, uint8_t attr_type, |
| 630 | uint16_t str_length, const char *str) |
| 631 | { |
| 632 | size_t length = |
| 633 | pldm_bios_table_attr_value_entry_encode_string_length(str_length); |
| 634 | assert(length <= entry_length); |
| 635 | |
| 636 | struct pldm_bios_attr_val_table_entry *table_entry = entry; |
| 637 | table_entry->attr_handle = htole16(attr_handle); |
| 638 | table_entry->attr_type = attr_type; |
| 639 | if (str_length != 0) |
| 640 | memcpy(table_entry->value + sizeof(str_length), str, |
| 641 | str_length); |
| 642 | str_length = htole16(str_length); |
| 643 | memcpy(table_entry->value, &str_length, sizeof(str_length)); |
| 644 | } |
| 645 | |
John Wang | 49484a1 | 2019-12-02 14:21:53 +0800 | [diff] [blame] | 646 | uint16_t pldm_bios_table_attr_value_entry_string_decode_length( |
| 647 | const struct pldm_bios_attr_val_table_entry *entry) |
| 648 | { |
| 649 | uint16_t str_length = 0; |
| 650 | memcpy(&str_length, entry->value, sizeof(str_length)); |
| 651 | return le16toh(str_length); |
| 652 | } |
| 653 | |
John Wang | b0da7a0 | 2020-01-07 16:55:00 +0800 | [diff] [blame] | 654 | void pldm_bios_table_attr_value_entry_string_decode_string( |
| 655 | const struct pldm_bios_attr_val_table_entry *entry, |
| 656 | struct variable_field *current_string) |
| 657 | { |
| 658 | current_string->length = |
| 659 | pldm_bios_table_attr_value_entry_string_decode_length(entry); |
| 660 | current_string->ptr = |
| 661 | entry->value + sizeof(uint16_t); // sizeof(CurrentStringLength) |
| 662 | } |
| 663 | |
John Wang | 3ad2175 | 2019-10-06 16:42:21 +0800 | [diff] [blame] | 664 | int pldm_bios_table_attr_value_entry_encode_string_check( |
| 665 | void *entry, size_t entry_length, uint16_t attr_handle, uint8_t attr_type, |
| 666 | uint16_t str_length, const char *str) |
| 667 | { |
| 668 | POINTER_CHECK(entry); |
| 669 | if (str_length != 0 && str == NULL) |
| 670 | return PLDM_ERROR_INVALID_DATA; |
| 671 | ATTR_TYPE_EXPECT(attr_type, PLDM_BIOS_STRING); |
| 672 | size_t length = |
| 673 | pldm_bios_table_attr_value_entry_encode_string_length(str_length); |
| 674 | BUFFER_SIZE_EXPECT(entry_length, length); |
| 675 | pldm_bios_table_attr_value_entry_encode_string( |
| 676 | entry, entry_length, attr_handle, attr_type, str_length, str); |
| 677 | return PLDM_SUCCESS; |
| 678 | } |
| 679 | |
John Wang | 49484a1 | 2019-12-02 14:21:53 +0800 | [diff] [blame] | 680 | static size_t attr_value_table_entry_length_string(const void *entry) |
| 681 | { |
| 682 | uint16_t str_length = |
| 683 | pldm_bios_table_attr_value_entry_string_decode_length(entry); |
| 684 | return pldm_bios_table_attr_value_entry_encode_string_length( |
| 685 | str_length); |
| 686 | } |
| 687 | |
John Wang | ca23082 | 2019-10-16 11:39:27 +0800 | [diff] [blame] | 688 | size_t pldm_bios_table_attr_value_entry_encode_integer_length() |
| 689 | { |
| 690 | return sizeof(struct pldm_bios_attr_val_table_entry) - 1 + |
| 691 | sizeof(uint64_t); |
| 692 | } |
| 693 | void pldm_bios_table_attr_value_entry_encode_integer(void *entry, |
| 694 | size_t entry_length, |
| 695 | uint16_t attr_handle, |
| 696 | uint8_t attr_type, |
| 697 | uint64_t cv) |
| 698 | { |
| 699 | size_t length = |
| 700 | pldm_bios_table_attr_value_entry_encode_integer_length(); |
| 701 | assert(length <= entry_length); |
| 702 | |
| 703 | struct pldm_bios_attr_val_table_entry *table_entry = entry; |
| 704 | table_entry->attr_handle = htole16(attr_handle); |
| 705 | table_entry->attr_type = attr_type; |
| 706 | cv = htole64(cv); |
| 707 | memcpy(table_entry->value, &cv, sizeof(uint64_t)); |
| 708 | } |
| 709 | |
| 710 | int pldm_bios_table_attr_value_entry_encode_integer_check(void *entry, |
| 711 | size_t entry_length, |
| 712 | uint16_t attr_handle, |
| 713 | uint8_t attr_type, |
| 714 | uint64_t cv) |
| 715 | { |
| 716 | POINTER_CHECK(entry); |
| 717 | size_t length = |
| 718 | pldm_bios_table_attr_value_entry_encode_integer_length(); |
| 719 | ATTR_TYPE_EXPECT(attr_type, PLDM_BIOS_INTEGER); |
| 720 | BUFFER_SIZE_EXPECT(entry_length, length); |
| 721 | pldm_bios_table_attr_value_entry_encode_integer( |
| 722 | entry, entry_length, attr_handle, attr_type, cv); |
| 723 | return PLDM_SUCCESS; |
| 724 | } |
| 725 | |
John Wang | b0da7a0 | 2020-01-07 16:55:00 +0800 | [diff] [blame] | 726 | uint64_t pldm_bios_table_attr_value_entry_integer_decode_cv( |
| 727 | const struct pldm_bios_attr_val_table_entry *entry) |
| 728 | { |
| 729 | uint64_t cv = 0; |
| 730 | memcpy(&cv, entry->value, sizeof(cv)); |
| 731 | cv = le64toh(cv); |
| 732 | return cv; |
| 733 | } |
| 734 | |
John Wang | 49484a1 | 2019-12-02 14:21:53 +0800 | [diff] [blame] | 735 | static size_t attr_value_table_entry_length_integer(const void *entry) |
| 736 | { |
| 737 | (void)entry; |
| 738 | return pldm_bios_table_attr_value_entry_encode_integer_length(); |
| 739 | } |
| 740 | |
John Wang | b6333cb | 2019-12-10 09:43:42 +0800 | [diff] [blame] | 741 | static const struct table_entry_length attr_value_table_entries[] = { |
John Wang | 49484a1 | 2019-12-02 14:21:53 +0800 | [diff] [blame] | 742 | {.attr_type = PLDM_BIOS_ENUMERATION, |
| 743 | .entry_length_handler = attr_value_table_entry_length_enum}, |
| 744 | {.attr_type = PLDM_BIOS_ENUMERATION_READ_ONLY, |
| 745 | .entry_length_handler = attr_value_table_entry_length_enum}, |
| 746 | {.attr_type = PLDM_BIOS_STRING, |
| 747 | .entry_length_handler = attr_value_table_entry_length_string}, |
| 748 | {.attr_type = PLDM_BIOS_STRING_READ_ONLY, |
| 749 | .entry_length_handler = attr_value_table_entry_length_string}, |
| 750 | {.attr_type = PLDM_BIOS_INTEGER, |
| 751 | .entry_length_handler = attr_value_table_entry_length_integer}, |
| 752 | {.attr_type = PLDM_BIOS_INTEGER_READ_ONLY, |
| 753 | .entry_length_handler = attr_value_table_entry_length_integer}, |
| 754 | }; |
| 755 | |
| 756 | static size_t attr_value_table_entry_length(const void *table_entry) |
| 757 | { |
| 758 | const struct pldm_bios_attr_val_table_entry *entry = table_entry; |
John Wang | b6333cb | 2019-12-10 09:43:42 +0800 | [diff] [blame] | 759 | const struct table_entry_length *entry_length = |
John Wang | 49484a1 | 2019-12-02 14:21:53 +0800 | [diff] [blame] | 760 | find_table_entry_length_by_type( |
| 761 | entry->attr_type, attr_value_table_entries, |
| 762 | ARRAY_SIZE(attr_value_table_entries)); |
| 763 | assert(entry_length != NULL); |
| 764 | assert(entry_length->entry_length_handler != NULL); |
| 765 | |
| 766 | return entry_length->entry_length_handler(entry); |
| 767 | } |
| 768 | |
John Wang | 8e877e0 | 2020-02-03 16:06:55 +0800 | [diff] [blame] | 769 | size_t pldm_bios_table_attr_value_entry_length( |
| 770 | const struct pldm_bios_attr_val_table_entry *entry) |
| 771 | { |
| 772 | return attr_value_table_entry_length(entry); |
| 773 | } |
| 774 | |
John Wang | 3342adb | 2019-11-29 16:03:58 +0800 | [diff] [blame] | 775 | uint16_t pldm_bios_table_attr_value_entry_decode_handle( |
| 776 | const struct pldm_bios_attr_val_table_entry *entry) |
| 777 | { |
| 778 | return le16toh(entry->attr_handle); |
| 779 | } |
| 780 | |
John Wang | 79c37f1 | 2019-10-31 15:46:31 +0800 | [diff] [blame] | 781 | static size_t pad_size_get(size_t size_without_pad) |
| 782 | { |
| 783 | return ((size_without_pad % 4) ? (4 - size_without_pad % 4) : 0); |
| 784 | } |
| 785 | |
| 786 | static uint8_t *pad_append(uint8_t *table_end, size_t pad_size) |
| 787 | { |
| 788 | while (pad_size--) |
| 789 | *table_end++ = 0; |
| 790 | |
| 791 | return table_end; |
| 792 | } |
| 793 | |
| 794 | static uint8_t *checksum_append(uint8_t *table_end, uint32_t checksum) |
| 795 | { |
| 796 | checksum = htole32(checksum); |
| 797 | memcpy(table_end, &checksum, sizeof(checksum)); |
| 798 | |
| 799 | return table_end + sizeof(checksum); |
| 800 | } |
| 801 | |
| 802 | size_t pldm_bios_table_pad_checksum_size(size_t size_without_pad) |
| 803 | { |
| 804 | size_t size = pad_size_get(size_without_pad) + |
| 805 | sizeof(uint32_t) /*sizeof(checksum)*/; |
| 806 | return size; |
| 807 | } |
| 808 | |
John Wang | 871c927 | 2019-12-09 18:02:15 +0800 | [diff] [blame] | 809 | size_t pldm_bios_table_append_pad_checksum(void *table, size_t size, |
| 810 | size_t size_without_pad) |
John Wang | 79c37f1 | 2019-10-31 15:46:31 +0800 | [diff] [blame] | 811 | { |
| 812 | |
| 813 | size_t pad_checksum_size = |
| 814 | pldm_bios_table_pad_checksum_size(size_without_pad); |
John Wang | 871c927 | 2019-12-09 18:02:15 +0800 | [diff] [blame] | 815 | size_t total_length = size_without_pad + pad_checksum_size; |
| 816 | assert(size >= total_length); |
John Wang | 79c37f1 | 2019-10-31 15:46:31 +0800 | [diff] [blame] | 817 | |
| 818 | uint8_t *table_end = (uint8_t *)table + size_without_pad; |
| 819 | size_t pad_size = pad_size_get(size_without_pad); |
| 820 | table_end = pad_append(table_end, pad_size); |
| 821 | |
| 822 | uint32_t checksum = crc32(table, size_without_pad + pad_size); |
| 823 | checksum_append(table_end, checksum); |
John Wang | 871c927 | 2019-12-09 18:02:15 +0800 | [diff] [blame] | 824 | |
| 825 | return total_length; |
John Wang | 79c37f1 | 2019-10-31 15:46:31 +0800 | [diff] [blame] | 826 | } |
| 827 | |
John Wang | 0270040 | 2019-10-06 16:34:29 +0800 | [diff] [blame] | 828 | struct pldm_bios_table_iter { |
| 829 | const uint8_t *table_data; |
| 830 | size_t table_len; |
| 831 | size_t current_pos; |
| 832 | size_t (*entry_length_handler)(const void *table_entry); |
| 833 | }; |
| 834 | |
| 835 | struct pldm_bios_table_iter * |
| 836 | pldm_bios_table_iter_create(const void *table, size_t length, |
| 837 | enum pldm_bios_table_types type) |
| 838 | { |
| 839 | struct pldm_bios_table_iter *iter = malloc(sizeof(*iter)); |
| 840 | assert(iter != NULL); |
| 841 | iter->table_data = table; |
| 842 | iter->table_len = length; |
| 843 | iter->current_pos = 0; |
| 844 | iter->entry_length_handler = NULL; |
| 845 | switch (type) { |
| 846 | case PLDM_BIOS_STRING_TABLE: |
John Wang | dd9a628 | 2019-10-11 18:52:46 +0800 | [diff] [blame] | 847 | iter->entry_length_handler = string_table_entry_length; |
John Wang | 0270040 | 2019-10-06 16:34:29 +0800 | [diff] [blame] | 848 | break; |
| 849 | case PLDM_BIOS_ATTR_TABLE: |
| 850 | iter->entry_length_handler = attr_table_entry_length; |
| 851 | break; |
| 852 | case PLDM_BIOS_ATTR_VAL_TABLE: |
John Wang | 49484a1 | 2019-12-02 14:21:53 +0800 | [diff] [blame] | 853 | iter->entry_length_handler = attr_value_table_entry_length; |
John Wang | 0270040 | 2019-10-06 16:34:29 +0800 | [diff] [blame] | 854 | break; |
| 855 | } |
| 856 | |
| 857 | return iter; |
| 858 | } |
| 859 | |
| 860 | void pldm_bios_table_iter_free(struct pldm_bios_table_iter *iter) |
| 861 | { |
| 862 | free(iter); |
| 863 | } |
| 864 | |
| 865 | #define pad_and_check_max 7 |
| 866 | bool pldm_bios_table_iter_is_end(const struct pldm_bios_table_iter *iter) |
| 867 | { |
| 868 | if (iter->table_len - iter->current_pos <= pad_and_check_max) |
| 869 | return true; |
| 870 | return false; |
| 871 | } |
| 872 | |
| 873 | void pldm_bios_table_iter_next(struct pldm_bios_table_iter *iter) |
| 874 | { |
| 875 | if (pldm_bios_table_iter_is_end(iter)) |
| 876 | return; |
| 877 | const void *entry = iter->table_data + iter->current_pos; |
| 878 | iter->current_pos += iter->entry_length_handler(entry); |
| 879 | } |
| 880 | |
| 881 | const void *pldm_bios_table_iter_value(struct pldm_bios_table_iter *iter) |
| 882 | { |
| 883 | return iter->table_data + iter->current_pos; |
John Wang | 3ad2175 | 2019-10-06 16:42:21 +0800 | [diff] [blame] | 884 | } |
John Wang | dd9a628 | 2019-10-11 18:52:46 +0800 | [diff] [blame] | 885 | |
John Wang | 3342adb | 2019-11-29 16:03:58 +0800 | [diff] [blame] | 886 | typedef bool (*equal_handler)(const void *entry, const void *key); |
| 887 | |
John Wang | dd9a628 | 2019-10-11 18:52:46 +0800 | [diff] [blame] | 888 | static const void * |
John Wang | 3342adb | 2019-11-29 16:03:58 +0800 | [diff] [blame] | 889 | pldm_bios_table_entry_find_by_iter(struct pldm_bios_table_iter *iter, |
| 890 | const void *key, equal_handler equal) |
John Wang | dd9a628 | 2019-10-11 18:52:46 +0800 | [diff] [blame] | 891 | { |
| 892 | const void *entry; |
| 893 | while (!pldm_bios_table_iter_is_end(iter)) { |
| 894 | entry = pldm_bios_table_iter_value(iter); |
| 895 | if (equal(entry, key)) |
| 896 | return entry; |
| 897 | pldm_bios_table_iter_next(iter); |
| 898 | } |
| 899 | return NULL; |
| 900 | } |
| 901 | |
John Wang | 3342adb | 2019-11-29 16:03:58 +0800 | [diff] [blame] | 902 | static const void * |
| 903 | pldm_bios_table_entry_find_from_table(const void *table, size_t length, |
| 904 | enum pldm_bios_table_types type, |
| 905 | equal_handler equal, const void *key) |
| 906 | { |
| 907 | struct pldm_bios_table_iter *iter = |
| 908 | pldm_bios_table_iter_create(table, length, type); |
| 909 | const void *entry = |
| 910 | pldm_bios_table_entry_find_by_iter(iter, key, equal); |
| 911 | pldm_bios_table_iter_free(iter); |
| 912 | return entry; |
| 913 | } |
| 914 | |
| 915 | static bool string_table_handle_equal(const void *entry, const void *key) |
John Wang | dd9a628 | 2019-10-11 18:52:46 +0800 | [diff] [blame] | 916 | { |
| 917 | const struct pldm_bios_string_table_entry *string_entry = entry; |
| 918 | uint16_t handle = *(uint16_t *)key; |
| 919 | if (pldm_bios_table_string_entry_decode_handle(string_entry) == handle) |
| 920 | return true; |
| 921 | return false; |
| 922 | } |
| 923 | |
John Wang | 3342adb | 2019-11-29 16:03:58 +0800 | [diff] [blame] | 924 | const struct pldm_bios_string_table_entry * |
| 925 | pldm_bios_table_string_find_by_handle(const void *table, size_t length, |
| 926 | uint16_t handle) |
| 927 | { |
| 928 | return pldm_bios_table_entry_find_from_table( |
| 929 | table, length, PLDM_BIOS_STRING_TABLE, string_table_handle_equal, |
| 930 | &handle); |
| 931 | } |
| 932 | |
John Wang | dd9a628 | 2019-10-11 18:52:46 +0800 | [diff] [blame] | 933 | struct string_equal_arg { |
| 934 | uint16_t str_length; |
| 935 | const char *str; |
| 936 | }; |
| 937 | |
John Wang | 3342adb | 2019-11-29 16:03:58 +0800 | [diff] [blame] | 938 | static bool string_table_string_equal(const void *entry, const void *key) |
John Wang | dd9a628 | 2019-10-11 18:52:46 +0800 | [diff] [blame] | 939 | { |
| 940 | const struct pldm_bios_string_table_entry *string_entry = entry; |
| 941 | const struct string_equal_arg *arg = key; |
| 942 | if (arg->str_length != |
| 943 | pldm_bios_table_string_entry_decode_string_length(string_entry)) |
| 944 | return false; |
| 945 | if (memcmp(string_entry->name, arg->str, arg->str_length) != 0) |
| 946 | return false; |
| 947 | return true; |
| 948 | } |
| 949 | |
| 950 | const struct pldm_bios_string_table_entry * |
| 951 | pldm_bios_table_string_find_by_string(const void *table, size_t length, |
| 952 | const char *str) |
| 953 | { |
| 954 | uint16_t str_length = strlen(str); |
| 955 | struct string_equal_arg arg = {str_length, str}; |
John Wang | 3342adb | 2019-11-29 16:03:58 +0800 | [diff] [blame] | 956 | return pldm_bios_table_entry_find_from_table( |
| 957 | table, length, PLDM_BIOS_STRING_TABLE, string_table_string_equal, |
| 958 | &arg); |
John Wang | dd9a628 | 2019-10-11 18:52:46 +0800 | [diff] [blame] | 959 | } |
| 960 | |
John Wang | b0da7a0 | 2020-01-07 16:55:00 +0800 | [diff] [blame] | 961 | static bool attr_table_handle_equal(const void *entry, const void *key) |
| 962 | { |
| 963 | uint16_t handle = *(uint16_t *)key; |
| 964 | return pldm_bios_table_attr_entry_decode_attribute_handle(entry) == |
| 965 | handle; |
| 966 | } |
| 967 | |
| 968 | const struct pldm_bios_attr_table_entry * |
| 969 | pldm_bios_table_attr_find_by_handle(const void *table, size_t length, |
| 970 | uint16_t handle) |
| 971 | { |
| 972 | return pldm_bios_table_entry_find_from_table( |
| 973 | table, length, PLDM_BIOS_ATTR_TABLE, attr_table_handle_equal, |
| 974 | &handle); |
| 975 | } |
| 976 | |
John Wang | 3342adb | 2019-11-29 16:03:58 +0800 | [diff] [blame] | 977 | static bool attr_value_table_handle_equal(const void *entry, const void *key) |
John Wang | dd9a628 | 2019-10-11 18:52:46 +0800 | [diff] [blame] | 978 | { |
John Wang | 3342adb | 2019-11-29 16:03:58 +0800 | [diff] [blame] | 979 | uint16_t handle = *(uint16_t *)key; |
| 980 | return pldm_bios_table_attr_value_entry_decode_handle(entry) == handle; |
| 981 | } |
| 982 | |
| 983 | const struct pldm_bios_attr_val_table_entry * |
| 984 | pldm_bios_table_attr_value_find_by_handle(const void *table, size_t length, |
| 985 | uint16_t handle) |
| 986 | { |
| 987 | return pldm_bios_table_entry_find_from_table( |
| 988 | table, length, PLDM_BIOS_ATTR_VAL_TABLE, |
| 989 | attr_value_table_handle_equal, &handle); |
John Wang | dd9a628 | 2019-10-11 18:52:46 +0800 | [diff] [blame] | 990 | } |
John Wang | 871c927 | 2019-12-09 18:02:15 +0800 | [diff] [blame] | 991 | |
| 992 | int pldm_bios_table_attr_value_copy_and_update( |
| 993 | const void *src_table, size_t src_length, void *dest_table, |
| 994 | size_t *dest_length, const void *entry, size_t entry_length) |
| 995 | { |
| 996 | struct pldm_bios_table_iter *iter = pldm_bios_table_iter_create( |
| 997 | src_table, src_length, PLDM_BIOS_ATTR_VAL_TABLE); |
| 998 | |
| 999 | int rc = PLDM_SUCCESS; |
| 1000 | const struct pldm_bios_attr_val_table_entry *tmp; |
| 1001 | size_t buffer_length = *dest_length, copied_length = 0, length = 0; |
| 1002 | while (!pldm_bios_table_iter_is_end(iter)) { |
| 1003 | tmp = pldm_bios_table_iter_attr_value_entry_value(iter); |
| 1004 | length = attr_value_table_entry_length(tmp); |
| 1005 | |
| 1006 | /* we need the tmp's entry_length here, iter_next will calculate |
| 1007 | * it too, use current_pos directly to avoid calculating it |
| 1008 | * twice */ |
| 1009 | iter->current_pos += length; |
| 1010 | if (tmp->attr_handle == |
| 1011 | ((const struct pldm_bios_attr_val_table_entry *)entry) |
| 1012 | ->attr_handle) { |
| 1013 | if (attribute_is_readonly(tmp->attr_type)) { |
| 1014 | rc = PLDM_ERROR_INVALID_DATA; |
| 1015 | goto out; |
| 1016 | } |
| 1017 | length = entry_length; |
| 1018 | tmp = entry; |
| 1019 | } |
| 1020 | if (copied_length + length > buffer_length) { |
| 1021 | rc = PLDM_ERROR_INVALID_LENGTH; |
| 1022 | goto out; |
| 1023 | } |
| 1024 | memcpy((uint8_t *)dest_table + copied_length, tmp, length); |
| 1025 | copied_length += length; |
| 1026 | } |
| 1027 | |
| 1028 | size_t pad_checksum_size = |
| 1029 | pldm_bios_table_pad_checksum_size(copied_length); |
| 1030 | if ((pad_checksum_size + copied_length) > buffer_length) { |
| 1031 | rc = PLDM_ERROR_INVALID_LENGTH; |
| 1032 | goto out; |
| 1033 | } |
| 1034 | |
| 1035 | *dest_length = pldm_bios_table_append_pad_checksum( |
| 1036 | dest_table, buffer_length, copied_length); |
| 1037 | out: |
| 1038 | pldm_bios_table_iter_free(iter); |
| 1039 | return rc; |
| 1040 | } |