Mayank Grover | ed69920 | 2017-05-30 20:04:10 +0530 | [diff] [blame] | 1 | /* |
| 2 | * Copyright (c) 2017, The Linux Foundation. All rights reserved. |
| 3 | * |
| 4 | * Redistribution and use in source and binary forms, with or without |
| 5 | * modification, are permitted provided that the following conditions are met: |
| 6 | * * Redistributions of source code must retain the above copyright |
| 7 | * notice, this list of conditions and the following disclaimer. |
| 8 | * * Redistributions in binary form must reproduce the above copyright |
| 9 | * notice, this list of conditions and the following disclaimer in the |
| 10 | * documentation and/or other materials provided with the distribution. |
| 11 | * * Neither the name of The Linux Foundation nor |
| 12 | * the names of its contributors may be used to endorse or promote |
| 13 | * products derived from this software without specific prior written |
| 14 | * permission. |
| 15 | * |
| 16 | * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| 17 | * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| 18 | * IMPLIED WARRANTIES OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND |
| 19 | * NON-INFRINGEMENT ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| 20 | * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, |
| 21 | * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, |
| 22 | * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; |
| 23 | * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, |
| 24 | * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR |
| 25 | * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
| 26 | * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| 27 | * |
| 28 | */ |
| 29 | #include <stdlib.h> |
| 30 | #include <string.h> |
| 31 | #include <crc32.h> |
| 32 | #include <ab_partition_parser.h> |
| 33 | #include <partition_parser.h> |
Mayank Grover | 9c86620 | 2017-06-29 17:48:55 +0530 | [diff] [blame] | 34 | #include <boot_device.h> |
| 35 | #if defined(MMC_SDHCI_SUPPORT) || defined(UFS_SUPPORT) |
| 36 | #include <mmc_wrapper.h> |
| 37 | #include <ufs.h> |
| 38 | #endif |
Mayank Grover | ed69920 | 2017-05-30 20:04:10 +0530 | [diff] [blame] | 39 | |
| 40 | //#define AB_DEBUG |
| 41 | |
| 42 | /* Slot suffix */ |
| 43 | const char *suffix_slot[] = {"_a", |
| 44 | "_b"}; |
Mayank Grover | 6ccc1c9 | 2017-07-04 17:36:46 +0530 | [diff] [blame] | 45 | const char *suffix_delimiter = "_"; |
Mayank Grover | ed69920 | 2017-05-30 20:04:10 +0530 | [diff] [blame] | 46 | |
| 47 | /* local global variables */ |
Mayank Grover | 25e3e3a | 2017-08-24 15:11:58 +0530 | [diff] [blame^] | 48 | static signed active_slot; /* to store current active slot */ |
| 49 | static bool attributes_updated; /* to store if we need to update partition table */ |
| 50 | static bool multislot_support; /* to store if multislot support is present */ |
Mayank Grover | ed69920 | 2017-05-30 20:04:10 +0530 | [diff] [blame] | 51 | |
| 52 | static int boot_slot_index[AB_SUPPORTED_SLOTS]; /* store index for boot parition */ |
| 53 | |
| 54 | /* local functions. */ |
| 55 | static void attributes_update(); |
| 56 | |
| 57 | /* |
| 58 | Function: To read slot attribute of |
| 59 | of the partition_entry |
| 60 | */ |
| 61 | inline bool slot_is_active(struct partition_entry *partition_entries, |
| 62 | unsigned index) |
| 63 | { |
| 64 | if ((partition_entries[index].attribute_flag & |
| 65 | PART_ATT_ACTIVE_VAL)>>PART_ATT_ACTIVE_BIT) |
| 66 | return true; |
| 67 | else |
| 68 | return false; |
| 69 | } |
| 70 | |
| 71 | inline bool slot_is_sucessful(struct partition_entry *partition_entries, |
| 72 | unsigned index) |
| 73 | { |
| 74 | if ((partition_entries[index].attribute_flag & |
| 75 | PART_ATT_SUCCESSFUL_VAL)>>PART_ATT_SUCCESS_BIT) |
| 76 | return true; |
| 77 | else |
| 78 | return false; |
| 79 | } |
| 80 | |
| 81 | inline unsigned slot_retry_count(struct partition_entry *partition_entries, |
| 82 | unsigned index) |
| 83 | { |
| 84 | return ((partition_entries[index].attribute_flag |
| 85 | & PART_ATT_MAX_RETRY_COUNT_VAL) >> PART_ATT_MAX_RETRY_CNT_BIT); |
| 86 | } |
| 87 | |
| 88 | inline unsigned slot_priority(struct partition_entry *partition_entries, |
| 89 | unsigned index) |
| 90 | { |
| 91 | return ((partition_entries[index].attribute_flag |
| 92 | & PART_ATT_PRIORITY_VAL)>>PART_ATT_PRIORITY_BIT); |
| 93 | } |
| 94 | |
| 95 | inline bool slot_is_bootable(struct partition_entry *partition_entries, |
| 96 | unsigned index) |
| 97 | { |
| 98 | if ((partition_entries[index].attribute_flag & |
| 99 | PART_ATT_UNBOOTABLE_VAL)>>PART_ATT_UNBOOTABLE_BIT) |
| 100 | return false; |
| 101 | else |
| 102 | return true; |
| 103 | } |
| 104 | |
| 105 | /* |
| 106 | Function scan boot partition to find SLOT_A/SLOT_B suffix. |
| 107 | If found than make multislot_boot flag true and |
| 108 | scans another partition. |
| 109 | */ |
| 110 | bool partition_scan_for_multislot() |
| 111 | { |
| 112 | int i, j, count = 0; |
| 113 | char *pname = NULL; |
| 114 | int strlen_boot = strlen("boot"); |
| 115 | int partition_count = partition_get_partition_count(); |
| 116 | struct partition_entry *partition_entries = |
| 117 | partition_get_partition_entries(); |
| 118 | |
Mayank Grover | 25e3e3a | 2017-08-24 15:11:58 +0530 | [diff] [blame^] | 119 | /* Intialize all slot specific variables */ |
Mayank Grover | ed69920 | 2017-05-30 20:04:10 +0530 | [diff] [blame] | 120 | multislot_support = false; |
Mayank Grover | 25e3e3a | 2017-08-24 15:11:58 +0530 | [diff] [blame^] | 121 | active_slot = INVALID; |
| 122 | attributes_updated = false; |
Mayank Grover | ed69920 | 2017-05-30 20:04:10 +0530 | [diff] [blame] | 123 | |
| 124 | if (partition_count > NUM_PARTITIONS) |
| 125 | { |
| 126 | dprintf(CRITICAL, "ERROR: partition_count more than supported.\n"); |
| 127 | return multislot_support; |
| 128 | } |
| 129 | |
| 130 | for (i = 0; i < partition_count; i++) |
| 131 | { |
| 132 | pname = (char *)partition_entries[i].name; |
| 133 | #ifdef AB_DEBUG |
| 134 | dprintf(INFO, "Transversing partition %s\n", pname); |
| 135 | #endif |
| 136 | if (!strncmp((const char *)partition_entries[i].name, "boot", strlen_boot)) |
| 137 | { |
| 138 | pname += strlen_boot; |
| 139 | if (*pname) |
| 140 | { |
| 141 | #ifdef AB_DEBUG |
| 142 | dprintf(INFO, "Suffix: %s\n", pname); |
| 143 | #endif |
| 144 | for (j =0; j<AB_SUPPORTED_SLOTS; j++) |
| 145 | { |
| 146 | if (!strcmp(pname, suffix_slot[j])) |
| 147 | { |
| 148 | /* cache these variables as they are used multiple times */ |
| 149 | boot_slot_index[j] = i; |
| 150 | if (!multislot_support) |
| 151 | multislot_support =true; |
| 152 | count ++; |
| 153 | } |
| 154 | } |
| 155 | /* Break out of loop if all slot index are found*/ |
| 156 | if (count == AB_SUPPORTED_SLOTS) |
| 157 | break; |
| 158 | } |
| 159 | else |
| 160 | { |
| 161 | #ifdef AB_DEBUG |
| 162 | dprintf(INFO, "Partition Table is not a/b supported\n"); |
| 163 | #endif |
| 164 | break; |
| 165 | } |
| 166 | } |
| 167 | } |
| 168 | return multislot_support; |
| 169 | } |
| 170 | |
| 171 | /* |
| 172 | Function: To reset partition attributes |
| 173 | This function reset partition_priority, retry_count |
| 174 | and clear successful and bootable bits. |
| 175 | */ |
| 176 | void partition_reset_attributes(unsigned index) |
| 177 | { |
| 178 | struct partition_entry *partition_entries = |
| 179 | partition_get_partition_entries(); |
| 180 | |
| 181 | partition_entries[index].attribute_flag |= (PART_ATT_PRIORITY_VAL | |
| 182 | PART_ATT_MAX_RETRY_COUNT_VAL); |
| 183 | |
| 184 | partition_entries[index].attribute_flag &= ((~PART_ATT_SUCCESSFUL_VAL) & |
| 185 | (~PART_ATT_UNBOOTABLE_VAL)); |
| 186 | |
| 187 | if (!attributes_updated) |
| 188 | attributes_updated = true; |
| 189 | |
| 190 | /* Make attributes persistant */ |
| 191 | partition_mark_active_slot(active_slot); |
| 192 | } |
| 193 | |
| 194 | /* |
| 195 | Function: Switch active partitions. |
| 196 | */ |
| 197 | void partition_switch_slots(int old_slot, int new_slot) |
| 198 | { |
| 199 | #ifdef AB_DEBUG |
| 200 | dprintf(INFO, "Switching slots %s to %s\n", |
| 201 | SUFFIX_SLOT(old_slot), SUFFIX_SLOT(new_slot)); |
| 202 | #endif |
| 203 | struct partition_entry *partition_entries = |
| 204 | partition_get_partition_entries(); |
| 205 | int old_slot_index = boot_slot_index[old_slot]; |
| 206 | int new_slot_index = boot_slot_index[new_slot]; |
| 207 | |
| 208 | /* Mark current slot inactive, keeping all other attributes intact */ |
| 209 | partition_entries[old_slot_index].attribute_flag &= ~PART_ATT_ACTIVE_VAL; |
| 210 | |
| 211 | /* Mark new slot active */ |
| 212 | partition_entries[new_slot_index].attribute_flag |= |
| 213 | ((PART_ATT_PRIORITY_VAL | |
| 214 | PART_ATT_ACTIVE_VAL | |
| 215 | PART_ATT_MAX_RETRY_COUNT_VAL)); |
| 216 | partition_entries[new_slot_index].attribute_flag &= |
| 217 | (~PART_ATT_SUCCESSFUL_VAL |
| 218 | & ~PART_ATT_UNBOOTABLE_VAL); |
| 219 | |
| 220 | if (!attributes_updated) |
| 221 | attributes_updated = true; |
| 222 | |
| 223 | /* Update active slot and gpt table */ |
| 224 | partition_mark_active_slot(new_slot); |
| 225 | return; |
| 226 | } |
| 227 | |
| 228 | /* |
| 229 | This function returns the most priority and active slot, |
| 230 | also you need to update the global state seperately. |
| 231 | |
| 232 | */ |
| 233 | int partition_find_active_slot() |
| 234 | { |
| 235 | unsigned current_priority; |
| 236 | int i, count = 0; |
| 237 | bool current_bootable_bit; |
| 238 | bool current_active_bit; |
| 239 | unsigned boot_priority; |
| 240 | struct partition_entry *partition_entries = partition_get_partition_entries(); |
| 241 | |
| 242 | /* Return current active slot if already found */ |
| 243 | if (active_slot != INVALID) |
| 244 | return active_slot; |
| 245 | |
| 246 | for (boot_priority = MAX_PRIORITY; |
| 247 | boot_priority > 0; boot_priority--) |
| 248 | { |
| 249 | /* Search valid boot slot with highest priority */ |
| 250 | for (i = 0; i < AB_SUPPORTED_SLOTS; i++) |
| 251 | { |
| 252 | current_priority = slot_priority(partition_entries, boot_slot_index[i]); |
| 253 | current_active_bit = slot_is_active(partition_entries, boot_slot_index[i]); |
| 254 | current_bootable_bit = slot_is_bootable(partition_entries, boot_slot_index[i]); |
| 255 | |
| 256 | /* Count number of slots with all attributes as zero */ |
| 257 | if ( !current_priority && |
| 258 | !current_active_bit && |
| 259 | current_bootable_bit) |
| 260 | { |
| 261 | count ++; |
| 262 | continue; |
| 263 | } |
| 264 | |
| 265 | #ifdef AB_DEBUG |
| 266 | dprintf(INFO, "Slot:Priority:Active:Bootable %s:%d:%d:%d \n", |
| 267 | partition_entries[boot_slot_index[i]].name, |
| 268 | current_priority, |
| 269 | current_active_bit, |
| 270 | current_bootable_bit); |
| 271 | #endif |
| 272 | if (boot_priority == current_priority) |
| 273 | { |
| 274 | if (current_active_bit && |
| 275 | current_bootable_bit) |
| 276 | { |
| 277 | #ifdef AB_DEBUG |
| 278 | dprintf(INFO, "Slot (%s) is Valid High Priority Slot\n", SUFFIX_SLOT(i)); |
| 279 | #endif |
| 280 | return i; |
| 281 | } |
| 282 | } |
| 283 | } |
| 284 | |
| 285 | /* All slots are zeroed, this is first bootup */ |
| 286 | /* Marking and trying SLOT 0 as default */ |
| 287 | if (count == AB_SUPPORTED_SLOTS) |
| 288 | { |
| 289 | /* Update the priority of the boot slot */ |
| 290 | partition_entries[boot_slot_index[SLOT_A]].attribute_flag |= |
| 291 | ((PART_ATT_PRIORITY_VAL | |
| 292 | PART_ATT_ACTIVE_VAL | |
| 293 | PART_ATT_MAX_RETRY_COUNT_VAL) & |
| 294 | (~PART_ATT_SUCCESSFUL_VAL & |
| 295 | ~PART_ATT_UNBOOTABLE_VAL)); |
| 296 | if (!attributes_updated) |
| 297 | attributes_updated = true; |
| 298 | return SLOT_A; |
| 299 | } |
| 300 | } |
| 301 | /* If no valid slot */ |
| 302 | return INVALID; |
| 303 | } |
| 304 | |
| 305 | static int |
| 306 | next_active_bootable_slot(struct partition_entry *ptn_entry) |
| 307 | { |
| 308 | int i, slt_index; |
| 309 | for (i = 0; i < AB_SUPPORTED_SLOTS; i++) |
| 310 | { |
| 311 | slt_index = boot_slot_index[i]; |
| 312 | if (slot_is_bootable(ptn_entry, slt_index)) |
| 313 | return i; |
| 314 | } |
| 315 | |
| 316 | /* NO Bootable slot */ |
| 317 | panic("ERROR: Unable to find any bootable slot"); |
| 318 | return 0; |
| 319 | } |
| 320 | |
| 321 | int partition_find_boot_slot() |
| 322 | { |
| 323 | int boot_slot; |
| 324 | int slt_index; |
| 325 | uint64_t boot_retry_count; |
| 326 | struct partition_entry *partition_entries = partition_get_partition_entries(); |
| 327 | |
| 328 | boot_retry_count = 0; |
| 329 | boot_slot = partition_find_active_slot(); |
| 330 | |
| 331 | if (boot_slot == INVALID) |
| 332 | goto out; |
| 333 | |
| 334 | slt_index = boot_slot_index[boot_slot]; |
| 335 | |
| 336 | /* Boot if partition flag is set to sucessful */ |
| 337 | if (partition_entries[slt_index].attribute_flag & PART_ATT_SUCCESSFUL_VAL) |
| 338 | goto out; |
| 339 | |
| 340 | boot_retry_count = slot_retry_count(partition_entries, slt_index); |
| 341 | |
| 342 | #ifdef AB_DEBUG |
| 343 | dprintf(INFO, "Boot Partition:RetryCount %s:%lld\n", partition_entries[slt_index].name, |
| 344 | boot_retry_count); |
| 345 | #endif |
| 346 | if (!boot_retry_count) |
| 347 | { |
| 348 | /* Mark slot invalide and unbootable */ |
| 349 | partition_entries[slt_index].attribute_flag |= |
| 350 | (PART_ATT_UNBOOTABLE_VAL & |
| 351 | ~PART_ATT_ACTIVE_VAL & |
| 352 | ~PART_ATT_PRIORITY_VAL); |
| 353 | |
| 354 | partition_switch_slots(boot_slot, next_active_bootable_slot(partition_entries)); |
| 355 | |
| 356 | reboot_device(0); |
| 357 | } |
| 358 | else |
| 359 | { |
| 360 | /* Do normal boot */ |
| 361 | /* Decrement retry count */ |
| 362 | partition_entries[slt_index].attribute_flag = |
| 363 | (partition_entries[slt_index].attribute_flag |
| 364 | & ~PART_ATT_MAX_RETRY_COUNT_VAL) |
| 365 | | ((boot_retry_count-1) << PART_ATT_MAX_RETRY_CNT_BIT); |
| 366 | |
| 367 | if (!attributes_updated) |
| 368 | attributes_updated = true; |
| 369 | |
| 370 | goto out; |
| 371 | } |
| 372 | |
| 373 | out: |
| 374 | #ifdef AB_DEBUG |
| 375 | dprintf(INFO, "Booting SLOT %d\n", boot_slot); |
| 376 | #endif |
| 377 | return boot_slot; |
| 378 | } |
| 379 | |
| 380 | static |
| 381 | void guid_update(struct partition_entry *partition_entries, |
| 382 | unsigned old_index, |
| 383 | unsigned new_index) |
| 384 | { |
| 385 | unsigned char tmp_guid[PARTITION_TYPE_GUID_SIZE]; |
| 386 | |
| 387 | memcpy(tmp_guid, partition_entries[old_index].type_guid, |
| 388 | PARTITION_TYPE_GUID_SIZE); |
| 389 | memcpy(partition_entries[old_index].type_guid, |
| 390 | partition_entries[new_index].type_guid, |
| 391 | PARTITION_TYPE_GUID_SIZE); |
| 392 | memcpy(partition_entries[new_index].type_guid, tmp_guid, |
| 393 | PARTITION_TYPE_GUID_SIZE); |
| 394 | return; |
| 395 | } |
| 396 | |
| 397 | /* |
| 398 | Function to swap guids of slots |
| 399 | */ |
| 400 | static void |
| 401 | swap_guid(int old_slot, int new_slot) |
| 402 | { |
| 403 | unsigned i, j, tmp_strlen; |
| 404 | unsigned partition_cnt = partition_get_partition_count(); |
| 405 | struct partition_entry *partition_entries = |
| 406 | partition_get_partition_entries(); |
| 407 | const char *ptr_pname, *ptr_suffix; |
| 408 | |
| 409 | if ( old_slot == new_slot) |
| 410 | return; |
| 411 | |
| 412 | for(i = 0; i < partition_cnt; i++) |
| 413 | { |
| 414 | ptr_pname = (const char *)partition_entries[i].name; |
| 415 | |
| 416 | /* Search for suffix in partition name */ |
| 417 | if ((ptr_suffix = strstr(ptr_pname, SUFFIX_SLOT(new_slot)))) |
| 418 | { |
| 419 | for (j = i+1; j < partition_cnt; j++) |
| 420 | { |
| 421 | tmp_strlen = strlen(ptr_pname)-strlen(SUFFIX_SLOT(new_slot)); |
| 422 | if (!strncmp((const char*)partition_entries[j].name, ptr_pname, tmp_strlen) && |
| 423 | strstr((const char*)partition_entries[j].name, SUFFIX_SLOT(old_slot))) |
| 424 | guid_update(partition_entries, j, i); |
| 425 | } |
| 426 | } |
| 427 | else if ((ptr_suffix = strstr(ptr_pname, SUFFIX_SLOT(old_slot)))) |
| 428 | { |
| 429 | for (j = i+1; j < partition_cnt; j++) |
| 430 | { |
| 431 | tmp_strlen = strlen(ptr_pname)-strlen(SUFFIX_SLOT(old_slot)); |
| 432 | if (!strncmp((const char *)partition_entries[j].name, ptr_pname, tmp_strlen) && |
| 433 | strstr((const char *)partition_entries[j].name, SUFFIX_SLOT(new_slot))) |
| 434 | guid_update(partition_entries, i, j); |
| 435 | } |
| 436 | } |
| 437 | } |
| 438 | } |
| 439 | |
| 440 | /* |
Mayank Grover | 25e3e3a | 2017-08-24 15:11:58 +0530 | [diff] [blame^] | 441 | Function: To set active bit of all partitions of actve slot. |
| 442 | also, unset active bits of all other slot |
| 443 | */ |
| 444 | static void |
| 445 | mark_all_partitions_active(signed slot) |
| 446 | { |
| 447 | int i,j; |
| 448 | char *pname = NULL; |
| 449 | char *suffix_str = NULL; |
| 450 | struct partition_entry *partition_entries = |
| 451 | partition_get_partition_entries(); |
| 452 | int partition_count = partition_get_partition_count(); |
| 453 | |
| 454 | for (i=0; i<partition_count; i++) |
| 455 | { |
| 456 | pname = (char *)partition_entries[i].name; |
| 457 | #ifdef AB_DEBUG |
| 458 | dprintf(INFO, "Transversing partition %s\n", pname); |
| 459 | #endif |
| 460 | /* 1. Find partition, if it is A/B enabled. */ |
| 461 | for ( j = 0; j<AB_SUPPORTED_SLOTS; j++) |
| 462 | { |
| 463 | suffix_str = strstr(pname, SUFFIX_SLOT(j)); |
| 464 | if (suffix_str) |
| 465 | break; |
| 466 | } |
| 467 | |
| 468 | if (suffix_str) |
| 469 | { |
| 470 | if (!strcmp(suffix_str, SUFFIX_SLOT(slot))) |
| 471 | /* 2a. Mark matching partition as active. */ |
| 472 | partition_entries[i].attribute_flag |= PART_ATT_ACTIVE_VAL; |
| 473 | else |
| 474 | /* 2b. Unset active bit for all other partitions. */ |
| 475 | partition_entries[i].attribute_flag &= ~PART_ATT_ACTIVE_VAL; |
| 476 | } |
| 477 | } |
| 478 | attributes_updated = true; |
| 479 | } |
| 480 | |
| 481 | /* |
Mayank Grover | ed69920 | 2017-05-30 20:04:10 +0530 | [diff] [blame] | 482 | Function: Mark the slot to be active and also conditionally |
| 483 | update the slot parameters if there is a change. |
| 484 | */ |
| 485 | void partition_mark_active_slot(signed slot) |
| 486 | { |
| 487 | if (active_slot == slot) |
| 488 | goto out; |
| 489 | |
| 490 | switch (active_slot) |
| 491 | { |
| 492 | case INVALID: |
| 493 | if (slot != SLOT_A) |
| 494 | swap_guid(SLOT_A, slot); |
Mayank Grover | ed69920 | 2017-05-30 20:04:10 +0530 | [diff] [blame] | 495 | default: |
| 496 | if (slot == INVALID) |
| 497 | swap_guid(active_slot, SLOT_A); |
| 498 | else |
| 499 | swap_guid(active_slot, slot); |
| 500 | } |
| 501 | active_slot = slot; |
| 502 | out: |
Mayank Grover | 25e3e3a | 2017-08-24 15:11:58 +0530 | [diff] [blame^] | 503 | /* Set Active bit for all partitions of active slot */ |
| 504 | mark_all_partitions_active(slot); |
| 505 | |
Mayank Grover | ed69920 | 2017-05-30 20:04:10 +0530 | [diff] [blame] | 506 | if (attributes_updated) |
| 507 | attributes_update(); |
Mayank Grover | 25e3e3a | 2017-08-24 15:11:58 +0530 | [diff] [blame^] | 508 | |
Mayank Grover | ed69920 | 2017-05-30 20:04:10 +0530 | [diff] [blame] | 509 | return; |
| 510 | } |
| 511 | |
| 512 | /* Function to find if multislot is supported */ |
| 513 | bool partition_multislot_is_supported() |
| 514 | { |
| 515 | return multislot_support; |
| 516 | } |
| 517 | |
| 518 | /* |
| 519 | Function to populate partition meta used |
| 520 | for fastboot get var info publication. |
| 521 | |
| 522 | Input partition_entries, partition_count and |
| 523 | buffer to fill information. |
| 524 | |
| 525 | */ |
| 526 | int partition_fill_partition_meta(char has_slot_pname[][MAX_GET_VAR_NAME_SIZE], |
| 527 | char has_slot_reply[][MAX_RSP_SIZE], |
| 528 | int array_size) |
| 529 | { |
| 530 | int i,j,tmp; |
| 531 | int count = 0; |
| 532 | char *pname = NULL; |
| 533 | int pname_size; |
| 534 | struct partition_entry *partition_entries = |
| 535 | partition_get_partition_entries(); |
| 536 | int partition_count = partition_get_partition_count(); |
| 537 | char *suffix_str; |
| 538 | |
| 539 | for (i=0; i<partition_count; i++) |
| 540 | { |
| 541 | pname = (char *)partition_entries[i].name; |
| 542 | pname_size = strlen(pname); |
| 543 | suffix_str = NULL; |
| 544 | #ifdef AB_DEBUG |
| 545 | dprintf(INFO, "Transversing partition %s\n", pname); |
| 546 | #endif |
| 547 | /* 1. Find partition, if it is A/B enabled. */ |
| 548 | for ( j = 0; j<AB_SUPPORTED_SLOTS; j++) |
| 549 | { |
| 550 | suffix_str = strstr(pname, SUFFIX_SLOT(j)); |
| 551 | if (suffix_str) |
| 552 | break; |
| 553 | } |
| 554 | |
| 555 | if (suffix_str) |
| 556 | { |
| 557 | if (!strcmp(suffix_str, SUFFIX_SLOT(SLOT_A))) |
| 558 | { |
| 559 | /* 2. put the partition name in array */ |
| 560 | tmp = pname_size-strlen(suffix_str); |
| 561 | strlcpy(has_slot_pname[count], pname, tmp+1); |
Mayank Grover | d22a1f5 | 2017-06-20 11:07:33 +0530 | [diff] [blame] | 562 | strlcpy(has_slot_reply[count], " Yes", MAX_RSP_SIZE); |
Mayank Grover | ed69920 | 2017-05-30 20:04:10 +0530 | [diff] [blame] | 563 | count++; |
| 564 | } |
| 565 | } |
| 566 | else |
| 567 | { |
Mayank Grover | d22a1f5 | 2017-06-20 11:07:33 +0530 | [diff] [blame] | 568 | strlcpy(has_slot_pname[count], pname, MAX_GET_VAR_NAME_SIZE); |
| 569 | strlcpy(has_slot_reply[count], " No", MAX_RSP_SIZE); |
Mayank Grover | ed69920 | 2017-05-30 20:04:10 +0530 | [diff] [blame] | 570 | count++; |
| 571 | } |
| 572 | |
| 573 | /* Avoid over population of array provided */ |
| 574 | if (count >= array_size) |
| 575 | { |
| 576 | dprintf(CRITICAL, "ERROR: Not able to parse all partitions\n"); |
| 577 | return count; |
| 578 | } |
| 579 | } |
| 580 | #ifdef AB_DEBUG |
| 581 | for (i=0; i<count; i++) |
| 582 | dprintf(INFO, "has-slot:%s:%s\n", has_slot_pname[i], has_slot_reply[i]); |
| 583 | #endif |
| 584 | return count; |
| 585 | } |
| 586 | |
| 587 | /* |
| 588 | Function to populate the slot meta used |
| 589 | for fastboot get var info publication. |
| 590 | */ |
| 591 | void partition_fill_slot_meta(struct ab_slot_info *slot_info) |
| 592 | { |
| 593 | int i, current_slot_index; |
| 594 | struct partition_entry *ptn_entries = partition_get_partition_entries(); |
| 595 | char buff[3]; |
| 596 | |
| 597 | /* Update slot info */ |
| 598 | for(i=0; i<AB_SUPPORTED_SLOTS; i++) |
| 599 | { |
| 600 | current_slot_index = boot_slot_index[i]; |
Mayank Grover | d22a1f5 | 2017-06-20 11:07:33 +0530 | [diff] [blame] | 601 | strlcpy(slot_info[i].slot_is_unbootable_rsp, |
| 602 | slot_is_bootable(ptn_entries, current_slot_index)?"No":"Yes", |
| 603 | MAX_RSP_SIZE); |
| 604 | strlcpy(slot_info[i].slot_is_active_rsp, |
| 605 | slot_is_active(ptn_entries, current_slot_index)?"Yes":"No", |
| 606 | MAX_RSP_SIZE); |
| 607 | strlcpy(slot_info[i].slot_is_succesful_rsp, |
| 608 | slot_is_sucessful(ptn_entries, current_slot_index)?"Yes":"No", |
| 609 | MAX_RSP_SIZE); |
Mayank Grover | ed69920 | 2017-05-30 20:04:10 +0530 | [diff] [blame] | 610 | itoa(slot_retry_count(ptn_entries, current_slot_index), |
| 611 | (unsigned char *)buff, 2, 10); |
Mayank Grover | d22a1f5 | 2017-06-20 11:07:33 +0530 | [diff] [blame] | 612 | strlcpy(slot_info[i].slot_retry_count_rsp, buff, MAX_RSP_SIZE); |
Mayank Grover | ed69920 | 2017-05-30 20:04:10 +0530 | [diff] [blame] | 613 | } |
| 614 | } |
| 615 | |
| 616 | /* |
| 617 | Function to read and update the attributes of |
| 618 | GPT |
| 619 | */ |
| 620 | static int |
| 621 | update_gpt(uint64_t gpt_start_addr, |
| 622 | uint64_t gpt_hdr_offset, |
| 623 | uint64_t gpt_entries_offset) |
| 624 | { |
| 625 | char *buffer = NULL; |
| 626 | char *gpt_entries_ptr, *gpt_hdr_ptr, *tmp = NULL; |
| 627 | struct partition_entry *partition_entries = partition_get_partition_entries(); |
| 628 | uint32_t partition_count = partition_get_partition_count(); |
| 629 | unsigned i,max_partition_count = 0; |
| 630 | unsigned partition_entry_size = 0; |
| 631 | uint32_t block_size = mmc_get_device_blocksize(); |
| 632 | uint32_t crc_val = 0; |
| 633 | int ret = 0; |
| 634 | uint64_t max_gpt_size_bytes = |
| 635 | (PARTITION_ENTRY_SIZE*NUM_PARTITIONS + GPT_HEADER_BLOCKS*block_size); |
Mayank Grover | 9c86620 | 2017-06-29 17:48:55 +0530 | [diff] [blame] | 636 | int lun = -1; |
| 637 | |
| 638 | /* Get Current LUN for UFS target */ |
| 639 | if (!platform_boot_dev_isemmc()) |
| 640 | lun = mmc_get_lun(); |
Mayank Grover | ed69920 | 2017-05-30 20:04:10 +0530 | [diff] [blame] | 641 | |
| 642 | buffer = memalign(CACHE_LINE, ROUNDUP(max_gpt_size_bytes, CACHE_LINE)); |
Mayank Grover | d22a1f5 | 2017-06-20 11:07:33 +0530 | [diff] [blame] | 643 | if (!buffer) |
| 644 | { |
| 645 | dprintf(CRITICAL, "update_gpt: Failed at memory allocation\n"); |
| 646 | goto out; |
| 647 | } |
| 648 | |
Mayank Grover | ed69920 | 2017-05-30 20:04:10 +0530 | [diff] [blame] | 649 | ret = mmc_read(gpt_start_addr, (uint32_t *)buffer, |
| 650 | max_gpt_size_bytes); |
| 651 | if (ret) |
| 652 | { |
| 653 | dprintf(CRITICAL, "Failed to read GPT\n"); |
| 654 | goto out; |
| 655 | } |
| 656 | |
| 657 | /* 0. Intialise ptrs for header and entries */ |
| 658 | gpt_entries_ptr = buffer + gpt_entries_offset*block_size; |
| 659 | gpt_hdr_ptr = buffer + gpt_hdr_offset*block_size; |
| 660 | |
| 661 | /* 1. Update attributes_flag of partition entry */ |
| 662 | tmp = gpt_entries_ptr; |
| 663 | for (i=0;i<partition_count;i++) |
| 664 | { |
Mayank Grover | 9c86620 | 2017-06-29 17:48:55 +0530 | [diff] [blame] | 665 | if (lun != -1) |
| 666 | { |
| 667 | /* Partition table is populated with entries from lun 0 to max lun. |
| 668 | * break out of the loop once we see the partition lun is > current lun */ |
| 669 | if (partition_entries[i].lun > lun) |
| 670 | break; |
| 671 | /* Find the entry where the partition table for 'lun' starts |
| 672 | and then update the attributes */ |
| 673 | if (partition_entries[i].lun != lun) |
| 674 | continue; |
| 675 | } |
| 676 | |
Mayank Grover | ed69920 | 2017-05-30 20:04:10 +0530 | [diff] [blame] | 677 | /* Update the partition attributes */ |
| 678 | PUT_LONG_LONG(&tmp[ATTRIBUTE_FLAG_OFFSET], |
| 679 | partition_entries[i].attribute_flag); |
| 680 | memscpy(tmp, PARTITION_TYPE_GUID_SIZE, partition_entries[i].type_guid, |
| 681 | PARTITION_TYPE_GUID_SIZE); |
| 682 | |
| 683 | /* point to the next partition entry */ |
| 684 | tmp += PARTITION_ENTRY_SIZE; |
| 685 | } |
| 686 | |
| 687 | /* Calculate and update CRC of partition entries array */ |
| 688 | max_partition_count = |
| 689 | GET_LWORD_FROM_BYTE(&gpt_hdr_ptr[PARTITION_COUNT_OFFSET]); |
| 690 | partition_entry_size = |
| 691 | GET_LWORD_FROM_BYTE(&gpt_hdr_ptr[PENTRY_SIZE_OFFSET]); |
Kishor PK | 252e22c | 2017-08-30 17:26:43 +0530 | [diff] [blame] | 692 | |
| 693 | /* Check for partition entry size */ |
| 694 | if (partition_entry_size != PARTITION_ENTRY_SIZE) { |
| 695 | dprintf(CRITICAL,"Invalid parition entry size\n"); |
| 696 | goto out; |
| 697 | } |
| 698 | |
| 699 | /* Check for maximum partition size */ |
| 700 | if ((max_partition_count) > (MIN_PARTITION_ARRAY_SIZE /(partition_entry_size))) { |
| 701 | dprintf(CRITICAL, "Invalid maximum partition count\n"); |
| 702 | goto out; |
| 703 | } |
| 704 | |
Mayank Grover | ed69920 | 2017-05-30 20:04:10 +0530 | [diff] [blame] | 705 | crc_val = crc32(~0L, gpt_entries_ptr, ((max_partition_count) * |
| 706 | (partition_entry_size))) ^ (~0L); |
| 707 | PUT_LONG(&gpt_hdr_ptr[PARTITION_CRC_OFFSET], crc_val); |
| 708 | |
| 709 | |
| 710 | /* Write CRC to 0 before we calculate the crc of the GPT header */ |
| 711 | crc_val = 0; |
| 712 | PUT_LONG(&gpt_hdr_ptr[HEADER_CRC_OFFSET], crc_val); |
| 713 | crc_val = crc32(~0L,gpt_hdr_ptr, GPT_HEADER_SIZE) ^ (~0L); |
| 714 | PUT_LONG(&gpt_hdr_ptr[HEADER_CRC_OFFSET], crc_val); |
| 715 | |
| 716 | /* write to mmc */ |
| 717 | ret = mmc_write(gpt_start_addr, max_gpt_size_bytes, buffer); |
| 718 | if (ret) |
| 719 | { |
| 720 | dprintf(CRITICAL, "Failed to write gpt\n"); |
| 721 | goto out; |
| 722 | } |
| 723 | out: |
Mayank Grover | d22a1f5 | 2017-06-20 11:07:33 +0530 | [diff] [blame] | 724 | if (buffer) |
| 725 | free(buffer); |
Mayank Grover | ed69920 | 2017-05-30 20:04:10 +0530 | [diff] [blame] | 726 | return ret; |
| 727 | } |
| 728 | |
| 729 | /** |
| 730 | Function to update the backup and primary gpt |
| 731 | partition. |
| 732 | **/ |
| 733 | static void attributes_update() |
| 734 | { |
| 735 | uint64_t offset; |
| 736 | uint64_t gpt_entries_offset, gpt_hdr_offset; |
| 737 | uint64_t gpt_start_addr; |
| 738 | int ret; |
| 739 | uint32_t block_size = mmc_get_device_blocksize(); |
| 740 | unsigned max_entries_size_bytes = PARTITION_ENTRY_SIZE*NUM_PARTITIONS; |
| 741 | unsigned max_entries_blocks = max_entries_size_bytes/block_size; |
| 742 | unsigned max_gpt_blocks = GPT_HEADER_BLOCKS + max_entries_blocks; |
Mayank Grover | 9c86620 | 2017-06-29 17:48:55 +0530 | [diff] [blame] | 743 | int max_luns = 0, lun; |
| 744 | int cur_lun = mmc_get_lun(); |
Mayank Grover | ed69920 | 2017-05-30 20:04:10 +0530 | [diff] [blame] | 745 | |
Mayank Grover | 9c86620 | 2017-06-29 17:48:55 +0530 | [diff] [blame] | 746 | #if defined(MMC_SDHCI_SUPPORT) || defined(UFS_SUPPORT) |
| 747 | if (platform_boot_dev_isemmc()) |
| 748 | max_luns = 1; |
| 749 | else |
| 750 | max_luns = ufs_get_num_of_luns((struct ufs_dev*)target_mmc_device()); |
| 751 | #endif |
| 752 | for (lun = 0; lun < max_luns; lun++) |
Mayank Grover | ed69920 | 2017-05-30 20:04:10 +0530 | [diff] [blame] | 753 | { |
Mayank Grover | 9c86620 | 2017-06-29 17:48:55 +0530 | [diff] [blame] | 754 | /* Set current LUN */ |
| 755 | mmc_set_lun(lun); |
Mayank Grover | ed69920 | 2017-05-30 20:04:10 +0530 | [diff] [blame] | 756 | |
Mayank Grover | 9c86620 | 2017-06-29 17:48:55 +0530 | [diff] [blame] | 757 | /* Update Primary GPT */ |
| 758 | offset = 0x01; /* offset is 0x1 for primary GPT */ |
| 759 | gpt_start_addr = offset*block_size; |
| 760 | /* Take gpt_start_addr as start and calculate offset from that in block sz*/ |
| 761 | gpt_hdr_offset = 0; /* For primary partition offset is zero */ |
| 762 | gpt_entries_offset = GPT_HEADER_BLOCKS; |
Mayank Grover | ed69920 | 2017-05-30 20:04:10 +0530 | [diff] [blame] | 763 | |
Mayank Grover | 9c86620 | 2017-06-29 17:48:55 +0530 | [diff] [blame] | 764 | ret = update_gpt(gpt_start_addr, gpt_hdr_offset, gpt_entries_offset); |
| 765 | if (ret) |
| 766 | { |
| 767 | dprintf(CRITICAL, "Failed to update Primary GPT\n"); |
| 768 | return; |
| 769 | } |
| 770 | |
| 771 | /* Update Secondary GPT */ |
| 772 | offset = ((mmc_get_device_capacity()/block_size) - max_gpt_blocks); |
| 773 | gpt_start_addr = offset*block_size; |
| 774 | gpt_hdr_offset = max_entries_blocks; |
| 775 | gpt_entries_offset = 0; /* For secondary GPT entries offset is zero */ |
| 776 | |
| 777 | ret = update_gpt(gpt_start_addr, gpt_hdr_offset, gpt_entries_offset); |
| 778 | if (ret) |
| 779 | { |
| 780 | dprintf(CRITICAL, "Failed to update Secondary GPT\n"); |
| 781 | return; |
| 782 | } |
Mayank Grover | ed69920 | 2017-05-30 20:04:10 +0530 | [diff] [blame] | 783 | } |
Mayank Grover | 9c86620 | 2017-06-29 17:48:55 +0530 | [diff] [blame] | 784 | mmc_set_lun(cur_lun); |
Mayank Grover | ed69920 | 2017-05-30 20:04:10 +0530 | [diff] [blame] | 785 | return; |
| 786 | } |