1 /* 2 * Copyright 2019 Advanced Micro Devices, Inc. 3 * 4 * Permission is hereby granted, free of charge, to any person obtaining a 5 * copy of this software and associated documentation files (the "Software"), 6 * to deal in the Software without restriction, including without limitation 7 * the rights to use, copy, modify, merge, publish, distribute, sublicense, 8 * and/or sell copies of the Software, and to permit persons to whom the 9 * Software is furnished to do so, subject to the following conditions: 10 * 11 * The above copyright notice and this permission notice shall be included in 12 * all copies or substantial portions of the Software. 13 * 14 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR 15 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 16 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL 17 * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR 18 * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 19 * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 20 * OTHER DEALINGS IN THE SOFTWARE. 21 * 22 */ 23 24 #include "amdgpu_ras_eeprom.h" 25 #include "amdgpu.h" 26 #include "amdgpu_ras.h" 27 #include <linux/bits.h> 28 #include "atom.h" 29 30 #define EEPROM_I2C_TARGET_ADDR_VEGA20 0xA0 31 #define EEPROM_I2C_TARGET_ADDR_ARCTURUS 0xA8 32 #define EEPROM_I2C_TARGET_ADDR_ARCTURUS_D342 0xA0 33 #define EEPROM_I2C_TARGET_ADDR_SIENNA_CICHLID 0xA0 34 35 /* 36 * The 2 macros bellow represent the actual size in bytes that 37 * those entities occupy in the EEPROM memory. 38 * EEPROM_TABLE_RECORD_SIZE is different than sizeof(eeprom_table_record) which 39 * uses uint64 to store 6b fields such as retired_page. 40 */ 41 #define EEPROM_TABLE_HEADER_SIZE 20 42 #define EEPROM_TABLE_RECORD_SIZE 24 43 44 #define EEPROM_ADDRESS_SIZE 0x2 45 46 /* Table hdr is 'AMDR' */ 47 #define EEPROM_TABLE_HDR_VAL 0x414d4452 48 #define EEPROM_TABLE_VER 0x00010000 49 50 /* Bad GPU tag ‘BADG’ */ 51 #define EEPROM_TABLE_HDR_BAD 0x42414447 52 53 /* Assume 2 Mbit size */ 54 #define EEPROM_SIZE_BYTES 256000 55 #define EEPROM_PAGE__SIZE_BYTES 256 56 #define EEPROM_HDR_START 0 57 #define EEPROM_RECORD_START (EEPROM_HDR_START + EEPROM_TABLE_HEADER_SIZE) 58 #define EEPROM_MAX_RECORD_NUM ((EEPROM_SIZE_BYTES - EEPROM_TABLE_HEADER_SIZE) / EEPROM_TABLE_RECORD_SIZE) 59 #define EEPROM_ADDR_MSB_MASK GENMASK(17, 8) 60 61 #define to_amdgpu_device(x) (container_of(x, struct amdgpu_ras, eeprom_control))->adev 62 63 static bool __is_ras_eeprom_supported(struct amdgpu_device *adev) 64 { 65 if ((adev->asic_type == CHIP_VEGA20) || 66 (adev->asic_type == CHIP_ARCTURUS) || 67 (adev->asic_type == CHIP_SIENNA_CICHLID)) 68 return true; 69 70 return false; 71 } 72 73 static bool __get_eeprom_i2c_addr_arct(struct amdgpu_device *adev, 74 uint16_t *i2c_addr) 75 { 76 struct atom_context *atom_ctx = adev->mode_info.atom_context; 77 78 if (!i2c_addr || !atom_ctx) 79 return false; 80 81 if (strnstr(atom_ctx->vbios_version, 82 "D342", 83 sizeof(atom_ctx->vbios_version))) 84 *i2c_addr = EEPROM_I2C_TARGET_ADDR_ARCTURUS_D342; 85 else 86 *i2c_addr = EEPROM_I2C_TARGET_ADDR_ARCTURUS; 87 88 return true; 89 } 90 91 static bool __get_eeprom_i2c_addr(struct amdgpu_device *adev, 92 uint16_t *i2c_addr) 93 { 94 if (!i2c_addr) 95 return false; 96 97 switch (adev->asic_type) { 98 case CHIP_VEGA20: 99 *i2c_addr = EEPROM_I2C_TARGET_ADDR_VEGA20; 100 break; 101 102 case CHIP_ARCTURUS: 103 return __get_eeprom_i2c_addr_arct(adev, i2c_addr); 104 105 case CHIP_SIENNA_CICHLID: 106 *i2c_addr = EEPROM_I2C_TARGET_ADDR_SIENNA_CICHLID; 107 break; 108 109 default: 110 return false; 111 } 112 113 return true; 114 } 115 116 static void __encode_table_header_to_buff(struct amdgpu_ras_eeprom_table_header *hdr, 117 unsigned char *buff) 118 { 119 uint32_t *pp = (uint32_t *) buff; 120 121 pp[0] = cpu_to_le32(hdr->header); 122 pp[1] = cpu_to_le32(hdr->version); 123 pp[2] = cpu_to_le32(hdr->first_rec_offset); 124 pp[3] = cpu_to_le32(hdr->tbl_size); 125 pp[4] = cpu_to_le32(hdr->checksum); 126 } 127 128 static void __decode_table_header_from_buff(struct amdgpu_ras_eeprom_table_header *hdr, 129 unsigned char *buff) 130 { 131 uint32_t *pp = (uint32_t *)buff; 132 133 hdr->header = le32_to_cpu(pp[0]); 134 hdr->version = le32_to_cpu(pp[1]); 135 hdr->first_rec_offset = le32_to_cpu(pp[2]); 136 hdr->tbl_size = le32_to_cpu(pp[3]); 137 hdr->checksum = le32_to_cpu(pp[4]); 138 } 139 140 static int __update_table_header(struct amdgpu_ras_eeprom_control *control, 141 unsigned char *buff) 142 { 143 int ret = 0; 144 struct amdgpu_device *adev = to_amdgpu_device(control); 145 struct i2c_msg msg = { 146 .addr = 0, 147 .flags = 0, 148 .len = EEPROM_ADDRESS_SIZE + EEPROM_TABLE_HEADER_SIZE, 149 .buf = buff, 150 }; 151 152 153 *(uint16_t *)buff = EEPROM_HDR_START; 154 __encode_table_header_to_buff(&control->tbl_hdr, buff + EEPROM_ADDRESS_SIZE); 155 156 msg.addr = control->i2c_address; 157 158 /* i2c may be unstable in gpu reset */ 159 down_read(&adev->reset_sem); 160 ret = i2c_transfer(&adev->pm.smu_i2c, &msg, 1); 161 up_read(&adev->reset_sem); 162 163 if (ret < 1) 164 DRM_ERROR("Failed to write EEPROM table header, ret:%d", ret); 165 166 return ret; 167 } 168 169 static uint32_t __calc_hdr_byte_sum(struct amdgpu_ras_eeprom_control *control) 170 { 171 int i; 172 uint32_t tbl_sum = 0; 173 174 /* Header checksum, skip checksum field in the calculation */ 175 for (i = 0; i < sizeof(control->tbl_hdr) - sizeof(control->tbl_hdr.checksum); i++) 176 tbl_sum += *(((unsigned char *)&control->tbl_hdr) + i); 177 178 return tbl_sum; 179 } 180 181 static uint32_t __calc_recs_byte_sum(struct eeprom_table_record *records, 182 int num) 183 { 184 int i, j; 185 uint32_t tbl_sum = 0; 186 187 /* Records checksum */ 188 for (i = 0; i < num; i++) { 189 struct eeprom_table_record *record = &records[i]; 190 191 for (j = 0; j < sizeof(*record); j++) { 192 tbl_sum += *(((unsigned char *)record) + j); 193 } 194 } 195 196 return tbl_sum; 197 } 198 199 static inline uint32_t __calc_tbl_byte_sum(struct amdgpu_ras_eeprom_control *control, 200 struct eeprom_table_record *records, int num) 201 { 202 return __calc_hdr_byte_sum(control) + __calc_recs_byte_sum(records, num); 203 } 204 205 /* Checksum = 256 -((sum of all table entries) mod 256) */ 206 static void __update_tbl_checksum(struct amdgpu_ras_eeprom_control *control, 207 struct eeprom_table_record *records, int num, 208 uint32_t old_hdr_byte_sum) 209 { 210 /* 211 * This will update the table sum with new records. 212 * 213 * TODO: What happens when the EEPROM table is to be wrapped around 214 * and old records from start will get overridden. 215 */ 216 217 /* need to recalculate updated header byte sum */ 218 control->tbl_byte_sum -= old_hdr_byte_sum; 219 control->tbl_byte_sum += __calc_tbl_byte_sum(control, records, num); 220 221 control->tbl_hdr.checksum = 256 - (control->tbl_byte_sum % 256); 222 } 223 224 /* table sum mod 256 + checksum must equals 256 */ 225 static bool __validate_tbl_checksum(struct amdgpu_ras_eeprom_control *control, 226 struct eeprom_table_record *records, int num) 227 { 228 control->tbl_byte_sum = __calc_tbl_byte_sum(control, records, num); 229 230 if (control->tbl_hdr.checksum + (control->tbl_byte_sum % 256) != 256) { 231 DRM_WARN("Checksum mismatch, checksum: %u ", control->tbl_hdr.checksum); 232 return false; 233 } 234 235 return true; 236 } 237 238 static int amdgpu_ras_eeprom_correct_header_tag( 239 struct amdgpu_ras_eeprom_control *control, 240 uint32_t header) 241 { 242 unsigned char buff[EEPROM_ADDRESS_SIZE + EEPROM_TABLE_HEADER_SIZE]; 243 struct amdgpu_ras_eeprom_table_header *hdr = &control->tbl_hdr; 244 int ret = 0; 245 246 memset(buff, 0, EEPROM_ADDRESS_SIZE + EEPROM_TABLE_HEADER_SIZE); 247 248 mutex_lock(&control->tbl_mutex); 249 hdr->header = header; 250 ret = __update_table_header(control, buff); 251 mutex_unlock(&control->tbl_mutex); 252 253 return ret; 254 } 255 256 int amdgpu_ras_eeprom_reset_table(struct amdgpu_ras_eeprom_control *control) 257 { 258 unsigned char buff[EEPROM_ADDRESS_SIZE + EEPROM_TABLE_HEADER_SIZE] = { 0 }; 259 struct amdgpu_ras_eeprom_table_header *hdr = &control->tbl_hdr; 260 int ret = 0; 261 262 mutex_lock(&control->tbl_mutex); 263 264 hdr->header = EEPROM_TABLE_HDR_VAL; 265 hdr->version = EEPROM_TABLE_VER; 266 hdr->first_rec_offset = EEPROM_RECORD_START; 267 hdr->tbl_size = EEPROM_TABLE_HEADER_SIZE; 268 269 control->tbl_byte_sum = 0; 270 __update_tbl_checksum(control, NULL, 0, 0); 271 control->next_addr = EEPROM_RECORD_START; 272 273 ret = __update_table_header(control, buff); 274 275 mutex_unlock(&control->tbl_mutex); 276 277 return ret; 278 279 } 280 281 int amdgpu_ras_eeprom_init(struct amdgpu_ras_eeprom_control *control, 282 bool *exceed_err_limit) 283 { 284 int ret = 0; 285 struct amdgpu_device *adev = to_amdgpu_device(control); 286 unsigned char buff[EEPROM_ADDRESS_SIZE + EEPROM_TABLE_HEADER_SIZE] = { 0 }; 287 struct amdgpu_ras_eeprom_table_header *hdr = &control->tbl_hdr; 288 struct amdgpu_ras *ras = amdgpu_ras_get_context(adev); 289 struct i2c_msg msg = { 290 .addr = 0, 291 .flags = I2C_M_RD, 292 .len = EEPROM_ADDRESS_SIZE + EEPROM_TABLE_HEADER_SIZE, 293 .buf = buff, 294 }; 295 296 *exceed_err_limit = false; 297 298 if (!__is_ras_eeprom_supported(adev)) 299 return 0; 300 301 /* Verify i2c adapter is initialized */ 302 if (!adev->pm.smu_i2c.algo) 303 return -ENOENT; 304 305 if (!__get_eeprom_i2c_addr(adev, &control->i2c_address)) 306 return -EINVAL; 307 308 mutex_init(&control->tbl_mutex); 309 310 msg.addr = control->i2c_address; 311 /* Read/Create table header from EEPROM address 0 */ 312 ret = i2c_transfer(&adev->pm.smu_i2c, &msg, 1); 313 if (ret < 1) { 314 DRM_ERROR("Failed to read EEPROM table header, ret:%d", ret); 315 return ret; 316 } 317 318 __decode_table_header_from_buff(hdr, &buff[2]); 319 320 if (hdr->header == EEPROM_TABLE_HDR_VAL) { 321 control->num_recs = (hdr->tbl_size - EEPROM_TABLE_HEADER_SIZE) / 322 EEPROM_TABLE_RECORD_SIZE; 323 control->tbl_byte_sum = __calc_hdr_byte_sum(control); 324 control->next_addr = EEPROM_RECORD_START; 325 326 DRM_DEBUG_DRIVER("Found existing EEPROM table with %d records", 327 control->num_recs); 328 329 } else if ((hdr->header == EEPROM_TABLE_HDR_BAD) && 330 (amdgpu_bad_page_threshold != 0)) { 331 if (ras->bad_page_cnt_threshold > control->num_recs) { 332 dev_info(adev->dev, "Using one valid bigger bad page " 333 "threshold and correcting eeprom header tag.\n"); 334 ret = amdgpu_ras_eeprom_correct_header_tag(control, 335 EEPROM_TABLE_HDR_VAL); 336 } else { 337 *exceed_err_limit = true; 338 dev_err(adev->dev, "Exceeding the bad_page_threshold parameter, " 339 "disabling the GPU.\n"); 340 } 341 } else { 342 DRM_INFO("Creating new EEPROM table"); 343 344 ret = amdgpu_ras_eeprom_reset_table(control); 345 } 346 347 return ret == 1 ? 0 : -EIO; 348 } 349 350 static void __encode_table_record_to_buff(struct amdgpu_ras_eeprom_control *control, 351 struct eeprom_table_record *record, 352 unsigned char *buff) 353 { 354 __le64 tmp = 0; 355 int i = 0; 356 357 /* Next are all record fields according to EEPROM page spec in LE foramt */ 358 buff[i++] = record->err_type; 359 360 buff[i++] = record->bank; 361 362 tmp = cpu_to_le64(record->ts); 363 memcpy(buff + i, &tmp, 8); 364 i += 8; 365 366 tmp = cpu_to_le64((record->offset & 0xffffffffffff)); 367 memcpy(buff + i, &tmp, 6); 368 i += 6; 369 370 buff[i++] = record->mem_channel; 371 buff[i++] = record->mcumc_id; 372 373 tmp = cpu_to_le64((record->retired_page & 0xffffffffffff)); 374 memcpy(buff + i, &tmp, 6); 375 } 376 377 static void __decode_table_record_from_buff(struct amdgpu_ras_eeprom_control *control, 378 struct eeprom_table_record *record, 379 unsigned char *buff) 380 { 381 __le64 tmp = 0; 382 int i = 0; 383 384 /* Next are all record fields according to EEPROM page spec in LE foramt */ 385 record->err_type = buff[i++]; 386 387 record->bank = buff[i++]; 388 389 memcpy(&tmp, buff + i, 8); 390 record->ts = le64_to_cpu(tmp); 391 i += 8; 392 393 memcpy(&tmp, buff + i, 6); 394 record->offset = (le64_to_cpu(tmp) & 0xffffffffffff); 395 i += 6; 396 397 record->mem_channel = buff[i++]; 398 record->mcumc_id = buff[i++]; 399 400 memcpy(&tmp, buff + i, 6); 401 record->retired_page = (le64_to_cpu(tmp) & 0xffffffffffff); 402 } 403 404 /* 405 * When reaching end of EEPROM memory jump back to 0 record address 406 * When next record access will go beyond EEPROM page boundary modify bits A17/A8 407 * in I2C selector to go to next page 408 */ 409 static uint32_t __correct_eeprom_dest_address(uint32_t curr_address) 410 { 411 uint32_t next_address = curr_address + EEPROM_TABLE_RECORD_SIZE; 412 413 /* When all EEPROM memory used jump back to 0 address */ 414 if (next_address > EEPROM_SIZE_BYTES) { 415 DRM_INFO("Reached end of EEPROM memory, jumping to 0 " 416 "and overriding old record"); 417 return EEPROM_RECORD_START; 418 } 419 420 /* 421 * To check if we overflow page boundary compare next address with 422 * current and see if bits 17/8 of the EEPROM address will change 423 * If they do start from the next 256b page 424 * 425 * https://www.st.com/resource/en/datasheet/m24m02-dr.pdf sec. 5.1.2 426 */ 427 if ((curr_address & EEPROM_ADDR_MSB_MASK) != (next_address & EEPROM_ADDR_MSB_MASK)) { 428 DRM_DEBUG_DRIVER("Reached end of EEPROM memory page, jumping to next: %lx", 429 (next_address & EEPROM_ADDR_MSB_MASK)); 430 431 return (next_address & EEPROM_ADDR_MSB_MASK); 432 } 433 434 return curr_address; 435 } 436 437 int amdgpu_ras_eeprom_check_err_threshold( 438 struct amdgpu_ras_eeprom_control *control, 439 bool *exceed_err_limit) 440 { 441 struct amdgpu_device *adev = to_amdgpu_device(control); 442 unsigned char buff[EEPROM_ADDRESS_SIZE + 443 EEPROM_TABLE_HEADER_SIZE] = { 0 }; 444 struct amdgpu_ras_eeprom_table_header *hdr = &control->tbl_hdr; 445 struct i2c_msg msg = { 446 .addr = control->i2c_address, 447 .flags = I2C_M_RD, 448 .len = EEPROM_ADDRESS_SIZE + EEPROM_TABLE_HEADER_SIZE, 449 .buf = buff, 450 }; 451 int ret; 452 453 *exceed_err_limit = false; 454 455 if (!__is_ras_eeprom_supported(adev)) 456 return 0; 457 458 /* read EEPROM table header */ 459 mutex_lock(&control->tbl_mutex); 460 ret = i2c_transfer(&adev->pm.smu_i2c, &msg, 1); 461 if (ret < 1) { 462 dev_err(adev->dev, "Failed to read EEPROM table header.\n"); 463 goto err; 464 } 465 466 __decode_table_header_from_buff(hdr, &buff[2]); 467 468 if (hdr->header == EEPROM_TABLE_HDR_BAD) { 469 dev_warn(adev->dev, "This GPU is in BAD status."); 470 dev_warn(adev->dev, "Please retire it or setting one bigger " 471 "threshold value when reloading driver.\n"); 472 *exceed_err_limit = true; 473 } 474 475 err: 476 mutex_unlock(&control->tbl_mutex); 477 return 0; 478 } 479 480 int amdgpu_ras_eeprom_process_recods(struct amdgpu_ras_eeprom_control *control, 481 struct eeprom_table_record *records, 482 bool write, 483 int num) 484 { 485 int i, ret = 0; 486 struct i2c_msg *msgs, *msg; 487 unsigned char *buffs, *buff; 488 struct eeprom_table_record *record; 489 struct amdgpu_device *adev = to_amdgpu_device(control); 490 struct amdgpu_ras *ras = amdgpu_ras_get_context(adev); 491 492 if (!__is_ras_eeprom_supported(adev)) 493 return 0; 494 495 buffs = kcalloc(num, EEPROM_ADDRESS_SIZE + EEPROM_TABLE_RECORD_SIZE, 496 GFP_KERNEL); 497 if (!buffs) 498 return -ENOMEM; 499 500 mutex_lock(&control->tbl_mutex); 501 502 msgs = kcalloc(num, sizeof(*msgs), GFP_KERNEL); 503 if (!msgs) { 504 ret = -ENOMEM; 505 goto free_buff; 506 } 507 508 /* 509 * If saved bad pages number exceeds the bad page threshold for 510 * the whole VRAM, update table header to mark the BAD GPU tag 511 * and schedule one ras recovery after eeprom write is done, 512 * this can avoid the missing for latest records. 513 * 514 * This new header will be picked up and checked in the bootup 515 * by ras recovery, which may break bootup process to notify 516 * user this GPU is in bad state and to retire such GPU for 517 * further check. 518 */ 519 if (write && (amdgpu_bad_page_threshold != 0) && 520 ((control->num_recs + num) >= ras->bad_page_cnt_threshold)) { 521 dev_warn(adev->dev, 522 "Saved bad pages(%d) reaches threshold value(%d).\n", 523 control->num_recs + num, ras->bad_page_cnt_threshold); 524 control->tbl_hdr.header = EEPROM_TABLE_HDR_BAD; 525 } 526 527 /* In case of overflow just start from beginning to not lose newest records */ 528 if (write && (control->next_addr + EEPROM_TABLE_RECORD_SIZE * num > EEPROM_SIZE_BYTES)) 529 control->next_addr = EEPROM_RECORD_START; 530 531 /* 532 * TODO Currently makes EEPROM writes for each record, this creates 533 * internal fragmentation. Optimized the code to do full page write of 534 * 256b 535 */ 536 for (i = 0; i < num; i++) { 537 buff = &buffs[i * (EEPROM_ADDRESS_SIZE + EEPROM_TABLE_RECORD_SIZE)]; 538 record = &records[i]; 539 msg = &msgs[i]; 540 541 control->next_addr = __correct_eeprom_dest_address(control->next_addr); 542 543 /* 544 * Update bits 16,17 of EEPROM address in I2C address by setting them 545 * to bits 1,2 of Device address byte 546 */ 547 msg->addr = control->i2c_address | 548 ((control->next_addr & EEPROM_ADDR_MSB_MASK) >> 15); 549 msg->flags = write ? 0 : I2C_M_RD; 550 msg->len = EEPROM_ADDRESS_SIZE + EEPROM_TABLE_RECORD_SIZE; 551 msg->buf = buff; 552 553 /* Insert the EEPROM dest addess, bits 0-15 */ 554 buff[0] = ((control->next_addr >> 8) & 0xff); 555 buff[1] = (control->next_addr & 0xff); 556 557 /* EEPROM table content is stored in LE format */ 558 if (write) 559 __encode_table_record_to_buff(control, record, buff + EEPROM_ADDRESS_SIZE); 560 561 /* 562 * The destination EEPROM address might need to be corrected to account 563 * for page or entire memory wrapping 564 */ 565 control->next_addr += EEPROM_TABLE_RECORD_SIZE; 566 } 567 568 /* i2c may be unstable in gpu reset */ 569 down_read(&adev->reset_sem); 570 ret = i2c_transfer(&adev->pm.smu_i2c, msgs, num); 571 up_read(&adev->reset_sem); 572 573 if (ret < 1) { 574 DRM_ERROR("Failed to process EEPROM table records, ret:%d", ret); 575 576 /* TODO Restore prev next EEPROM address ? */ 577 goto free_msgs; 578 } 579 580 581 if (!write) { 582 for (i = 0; i < num; i++) { 583 buff = &buffs[i*(EEPROM_ADDRESS_SIZE + EEPROM_TABLE_RECORD_SIZE)]; 584 record = &records[i]; 585 586 __decode_table_record_from_buff(control, record, buff + EEPROM_ADDRESS_SIZE); 587 } 588 } 589 590 if (write) { 591 uint32_t old_hdr_byte_sum = __calc_hdr_byte_sum(control); 592 593 /* 594 * Update table header with size and CRC and account for table 595 * wrap around where the assumption is that we treat it as empty 596 * table 597 * 598 * TODO - Check the assumption is correct 599 */ 600 control->num_recs += num; 601 control->num_recs %= EEPROM_MAX_RECORD_NUM; 602 control->tbl_hdr.tbl_size += EEPROM_TABLE_RECORD_SIZE * num; 603 if (control->tbl_hdr.tbl_size > EEPROM_SIZE_BYTES) 604 control->tbl_hdr.tbl_size = EEPROM_TABLE_HEADER_SIZE + 605 control->num_recs * EEPROM_TABLE_RECORD_SIZE; 606 607 __update_tbl_checksum(control, records, num, old_hdr_byte_sum); 608 609 __update_table_header(control, buffs); 610 } else if (!__validate_tbl_checksum(control, records, num)) { 611 DRM_WARN("EEPROM Table checksum mismatch!"); 612 /* TODO Uncomment when EEPROM read/write is relliable */ 613 /* ret = -EIO; */ 614 } 615 616 free_msgs: 617 kfree(msgs); 618 619 free_buff: 620 kfree(buffs); 621 622 mutex_unlock(&control->tbl_mutex); 623 624 return ret == num ? 0 : -EIO; 625 } 626 627 inline uint32_t amdgpu_ras_eeprom_get_record_max_length(void) 628 { 629 return EEPROM_MAX_RECORD_NUM; 630 } 631 632 /* Used for testing if bugs encountered */ 633 #if 0 634 void amdgpu_ras_eeprom_test(struct amdgpu_ras_eeprom_control *control) 635 { 636 int i; 637 struct eeprom_table_record *recs = kcalloc(1, sizeof(*recs), GFP_KERNEL); 638 639 if (!recs) 640 return; 641 642 for (i = 0; i < 1 ; i++) { 643 recs[i].address = 0xdeadbeef; 644 recs[i].retired_page = i; 645 } 646 647 if (!amdgpu_ras_eeprom_process_recods(control, recs, true, 1)) { 648 649 memset(recs, 0, sizeof(*recs) * 1); 650 651 control->next_addr = EEPROM_RECORD_START; 652 653 if (!amdgpu_ras_eeprom_process_recods(control, recs, false, 1)) { 654 for (i = 0; i < 1; i++) 655 DRM_INFO("rec.address :0x%llx, rec.retired_page :%llu", 656 recs[i].address, recs[i].retired_page); 657 } else 658 DRM_ERROR("Failed in reading from table"); 659 660 } else 661 DRM_ERROR("Failed in writing to table"); 662 } 663 #endif 664