1 // SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause 2 /* 3 * Copyright (C) 2017 Intel Deutschland GmbH 4 * Copyright (C) 2019-2024 Intel Corporation 5 */ 6 #include <linux/uuid.h> 7 #include "iwl-drv.h" 8 #include "iwl-debug.h" 9 #include "acpi.h" 10 #include "fw/runtime.h" 11 12 const guid_t iwl_guid = GUID_INIT(0xF21202BF, 0x8F78, 0x4DC6, 13 0xA5, 0xB3, 0x1F, 0x73, 14 0x8E, 0x28, 0x5A, 0xDE); 15 16 static const size_t acpi_dsm_size[DSM_FUNC_NUM_FUNCS] = { 17 [DSM_FUNC_QUERY] = sizeof(u32), 18 [DSM_FUNC_DISABLE_SRD] = sizeof(u8), 19 [DSM_FUNC_ENABLE_INDONESIA_5G2] = sizeof(u8), 20 [DSM_FUNC_ENABLE_6E] = sizeof(u32), 21 [DSM_FUNC_REGULATORY_CONFIG] = sizeof(u32), 22 /* Not supported in driver */ 23 [5] = (size_t)0, 24 [DSM_FUNC_11AX_ENABLEMENT] = sizeof(u32), 25 [DSM_FUNC_ENABLE_UNII4_CHAN] = sizeof(u32), 26 [DSM_FUNC_ACTIVATE_CHANNEL] = sizeof(u32), 27 [DSM_FUNC_FORCE_DISABLE_CHANNELS] = sizeof(u32), 28 [DSM_FUNC_ENERGY_DETECTION_THRESHOLD] = sizeof(u32), 29 [DSM_FUNC_RFI_CONFIG] = sizeof(u32), 30 [DSM_FUNC_ENABLE_11BE] = sizeof(u32), 31 }; 32 33 static int iwl_acpi_get_handle(struct device *dev, acpi_string method, 34 acpi_handle *ret_handle) 35 { 36 acpi_handle root_handle; 37 acpi_status status; 38 39 root_handle = ACPI_HANDLE(dev); 40 if (!root_handle) { 41 IWL_DEBUG_DEV_RADIO(dev, 42 "ACPI: Could not retrieve root port handle\n"); 43 return -ENOENT; 44 } 45 46 status = acpi_get_handle(root_handle, method, ret_handle); 47 if (ACPI_FAILURE(status)) { 48 IWL_DEBUG_DEV_RADIO(dev, 49 "ACPI: %s method not found\n", method); 50 return -ENOENT; 51 } 52 return 0; 53 } 54 55 static void *iwl_acpi_get_object(struct device *dev, acpi_string method) 56 { 57 struct acpi_buffer buf = {ACPI_ALLOCATE_BUFFER, NULL}; 58 acpi_handle handle; 59 acpi_status status; 60 int ret; 61 62 ret = iwl_acpi_get_handle(dev, method, &handle); 63 if (ret) 64 return ERR_PTR(-ENOENT); 65 66 /* Call the method with no arguments */ 67 status = acpi_evaluate_object(handle, NULL, NULL, &buf); 68 if (ACPI_FAILURE(status)) { 69 IWL_DEBUG_DEV_RADIO(dev, 70 "ACPI: %s method invocation failed (status: 0x%x)\n", 71 method, status); 72 return ERR_PTR(-ENOENT); 73 } 74 return buf.pointer; 75 } 76 77 /* 78 * Generic function for evaluating a method defined in the device specific 79 * method (DSM) interface. The returned acpi object must be freed by calling 80 * function. 81 */ 82 static void *iwl_acpi_get_dsm_object(struct device *dev, int rev, int func, 83 union acpi_object *args, 84 const guid_t *guid) 85 { 86 union acpi_object *obj; 87 88 obj = acpi_evaluate_dsm(ACPI_HANDLE(dev), guid, rev, func, 89 args); 90 if (!obj) { 91 IWL_DEBUG_DEV_RADIO(dev, 92 "ACPI: DSM method invocation failed (rev: %d, func:%d)\n", 93 rev, func); 94 return ERR_PTR(-ENOENT); 95 } 96 return obj; 97 } 98 99 /* 100 * Generic function to evaluate a DSM with no arguments 101 * and an integer return value, 102 * (as an integer object or inside a buffer object), 103 * verify and assign the value in the "value" parameter. 104 * return 0 in success and the appropriate errno otherwise. 105 */ 106 static int iwl_acpi_get_dsm_integer(struct device *dev, int rev, int func, 107 const guid_t *guid, u64 *value, 108 size_t expected_size) 109 { 110 union acpi_object *obj; 111 int ret = 0; 112 113 obj = iwl_acpi_get_dsm_object(dev, rev, func, NULL, guid); 114 if (IS_ERR(obj)) { 115 IWL_DEBUG_DEV_RADIO(dev, 116 "Failed to get DSM object. func= %d\n", 117 func); 118 return -ENOENT; 119 } 120 121 if (obj->type == ACPI_TYPE_INTEGER) { 122 *value = obj->integer.value; 123 } else if (obj->type == ACPI_TYPE_BUFFER) { 124 __le64 le_value = 0; 125 126 if (WARN_ON_ONCE(expected_size > sizeof(le_value))) 127 return -EINVAL; 128 129 /* if the buffer size doesn't match the expected size */ 130 if (obj->buffer.length != expected_size) 131 IWL_DEBUG_DEV_RADIO(dev, 132 "ACPI: DSM invalid buffer size, padding or truncating (%d)\n", 133 obj->buffer.length); 134 135 /* assuming LE from Intel BIOS spec */ 136 memcpy(&le_value, obj->buffer.pointer, 137 min_t(size_t, expected_size, (size_t)obj->buffer.length)); 138 *value = le64_to_cpu(le_value); 139 } else { 140 IWL_DEBUG_DEV_RADIO(dev, 141 "ACPI: DSM method did not return a valid object, type=%d\n", 142 obj->type); 143 ret = -EINVAL; 144 goto out; 145 } 146 147 IWL_DEBUG_DEV_RADIO(dev, 148 "ACPI: DSM method evaluated: func=%d, ret=%d\n", 149 func, ret); 150 out: 151 ACPI_FREE(obj); 152 return ret; 153 } 154 155 /* 156 * This function receives a DSM function number, calculates its expected size 157 * according to Intel BIOS spec, and fills in the value in a 32-bit field. 158 * In case the expected size is smaller than 32-bit, padding will be added. 159 */ 160 int iwl_acpi_get_dsm(struct iwl_fw_runtime *fwrt, 161 enum iwl_dsm_funcs func, u32 *value) 162 { 163 size_t expected_size; 164 u64 tmp; 165 int ret; 166 167 BUILD_BUG_ON(ARRAY_SIZE(acpi_dsm_size) != DSM_FUNC_NUM_FUNCS); 168 169 if (WARN_ON(func >= ARRAY_SIZE(acpi_dsm_size))) 170 return -EINVAL; 171 172 expected_size = acpi_dsm_size[func]; 173 174 /* Currently all ACPI DSMs are either 8-bit or 32-bit */ 175 if (expected_size != sizeof(u8) && expected_size != sizeof(u32)) 176 return -EOPNOTSUPP; 177 178 ret = iwl_acpi_get_dsm_integer(fwrt->dev, ACPI_DSM_REV, func, 179 &iwl_guid, &tmp, expected_size); 180 if (ret) 181 return ret; 182 183 if ((expected_size == sizeof(u8) && tmp != (u8)tmp) || 184 (expected_size == sizeof(u32) && tmp != (u32)tmp)) 185 IWL_DEBUG_RADIO(fwrt, 186 "DSM value overflows the expected size, truncating\n"); 187 *value = (u32)tmp; 188 189 return 0; 190 } 191 192 static union acpi_object * 193 iwl_acpi_get_wifi_pkg_range(struct device *dev, 194 union acpi_object *data, 195 int min_data_size, 196 int max_data_size, 197 int *tbl_rev) 198 { 199 int i; 200 union acpi_object *wifi_pkg; 201 202 /* 203 * We need at least one entry in the wifi package that 204 * describes the domain, and one more entry, otherwise there's 205 * no point in reading it. 206 */ 207 if (WARN_ON_ONCE(min_data_size < 2 || min_data_size > max_data_size)) 208 return ERR_PTR(-EINVAL); 209 210 /* 211 * We need at least two packages, one for the revision and one 212 * for the data itself. Also check that the revision is valid 213 * (i.e. it is an integer (each caller has to check by itself 214 * if the returned revision is supported)). 215 */ 216 if (data->type != ACPI_TYPE_PACKAGE || 217 data->package.count < 2 || 218 data->package.elements[0].type != ACPI_TYPE_INTEGER) { 219 IWL_DEBUG_DEV_RADIO(dev, "Invalid packages structure\n"); 220 return ERR_PTR(-EINVAL); 221 } 222 223 *tbl_rev = data->package.elements[0].integer.value; 224 225 /* loop through all the packages to find the one for WiFi */ 226 for (i = 1; i < data->package.count; i++) { 227 union acpi_object *domain; 228 229 wifi_pkg = &data->package.elements[i]; 230 231 /* skip entries that are not a package with the right size */ 232 if (wifi_pkg->type != ACPI_TYPE_PACKAGE || 233 wifi_pkg->package.count < min_data_size || 234 wifi_pkg->package.count > max_data_size) 235 continue; 236 237 domain = &wifi_pkg->package.elements[0]; 238 if (domain->type == ACPI_TYPE_INTEGER && 239 domain->integer.value == ACPI_WIFI_DOMAIN) 240 goto found; 241 } 242 243 return ERR_PTR(-ENOENT); 244 245 found: 246 return wifi_pkg; 247 } 248 249 static union acpi_object * 250 iwl_acpi_get_wifi_pkg(struct device *dev, 251 union acpi_object *data, 252 int data_size, int *tbl_rev) 253 { 254 return iwl_acpi_get_wifi_pkg_range(dev, data, data_size, data_size, 255 tbl_rev); 256 } 257 258 int iwl_acpi_get_tas_table(struct iwl_fw_runtime *fwrt, 259 struct iwl_tas_data *tas_data) 260 { 261 union acpi_object *wifi_pkg, *data; 262 int ret, tbl_rev, i, block_list_size, enabled; 263 264 data = iwl_acpi_get_object(fwrt->dev, ACPI_WTAS_METHOD); 265 if (IS_ERR(data)) 266 return PTR_ERR(data); 267 268 /* try to read wtas table revision 1 or revision 0*/ 269 wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data, 270 ACPI_WTAS_WIFI_DATA_SIZE, 271 &tbl_rev); 272 if (IS_ERR(wifi_pkg)) { 273 ret = PTR_ERR(wifi_pkg); 274 goto out_free; 275 } 276 277 if (tbl_rev == 1 && wifi_pkg->package.elements[1].type == 278 ACPI_TYPE_INTEGER) { 279 u32 tas_selection = 280 (u32)wifi_pkg->package.elements[1].integer.value; 281 282 enabled = iwl_parse_tas_selection(fwrt, tas_data, 283 tas_selection); 284 285 } else if (tbl_rev == 0 && 286 wifi_pkg->package.elements[1].type == ACPI_TYPE_INTEGER) { 287 enabled = !!wifi_pkg->package.elements[1].integer.value; 288 } else { 289 ret = -EINVAL; 290 goto out_free; 291 } 292 293 if (!enabled) { 294 IWL_DEBUG_RADIO(fwrt, "TAS not enabled\n"); 295 ret = 0; 296 goto out_free; 297 } 298 299 IWL_DEBUG_RADIO(fwrt, "Reading TAS table revision %d\n", tbl_rev); 300 if (wifi_pkg->package.elements[2].type != ACPI_TYPE_INTEGER || 301 wifi_pkg->package.elements[2].integer.value > 302 IWL_WTAS_BLACK_LIST_MAX) { 303 IWL_DEBUG_RADIO(fwrt, "TAS invalid array size %llu\n", 304 wifi_pkg->package.elements[2].integer.value); 305 ret = -EINVAL; 306 goto out_free; 307 } 308 block_list_size = wifi_pkg->package.elements[2].integer.value; 309 tas_data->block_list_size = cpu_to_le32(block_list_size); 310 311 IWL_DEBUG_RADIO(fwrt, "TAS array size %u\n", block_list_size); 312 313 for (i = 0; i < block_list_size; i++) { 314 u32 country; 315 316 if (wifi_pkg->package.elements[3 + i].type != 317 ACPI_TYPE_INTEGER) { 318 IWL_DEBUG_RADIO(fwrt, 319 "TAS invalid array elem %d\n", 3 + i); 320 ret = -EINVAL; 321 goto out_free; 322 } 323 324 country = wifi_pkg->package.elements[3 + i].integer.value; 325 tas_data->block_list_array[i] = cpu_to_le32(country); 326 IWL_DEBUG_RADIO(fwrt, "TAS block list country %d\n", country); 327 } 328 329 ret = 1; 330 out_free: 331 kfree(data); 332 return ret; 333 } 334 335 int iwl_acpi_get_mcc(struct iwl_fw_runtime *fwrt, char *mcc) 336 { 337 union acpi_object *wifi_pkg, *data; 338 u32 mcc_val; 339 int ret, tbl_rev; 340 341 data = iwl_acpi_get_object(fwrt->dev, ACPI_WRDD_METHOD); 342 if (IS_ERR(data)) 343 return PTR_ERR(data); 344 345 wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data, 346 ACPI_WRDD_WIFI_DATA_SIZE, 347 &tbl_rev); 348 if (IS_ERR(wifi_pkg)) { 349 ret = PTR_ERR(wifi_pkg); 350 goto out_free; 351 } 352 353 if (wifi_pkg->package.elements[1].type != ACPI_TYPE_INTEGER || 354 tbl_rev != 0) { 355 ret = -EINVAL; 356 goto out_free; 357 } 358 359 mcc_val = wifi_pkg->package.elements[1].integer.value; 360 if (mcc_val != BIOS_MCC_CHINA) { 361 ret = -EINVAL; 362 IWL_DEBUG_RADIO(fwrt, "ACPI WRDD is supported only for CN\n"); 363 goto out_free; 364 } 365 366 mcc[0] = (mcc_val >> 8) & 0xff; 367 mcc[1] = mcc_val & 0xff; 368 mcc[2] = '\0'; 369 370 ret = 0; 371 out_free: 372 kfree(data); 373 return ret; 374 } 375 376 int iwl_acpi_get_pwr_limit(struct iwl_fw_runtime *fwrt, u64 *dflt_pwr_limit) 377 { 378 union acpi_object *data, *wifi_pkg; 379 int tbl_rev, ret = -EINVAL; 380 381 *dflt_pwr_limit = 0; 382 data = iwl_acpi_get_object(fwrt->dev, ACPI_SPLC_METHOD); 383 if (IS_ERR(data)) 384 goto out; 385 386 wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data, 387 ACPI_SPLC_WIFI_DATA_SIZE, &tbl_rev); 388 if (IS_ERR(wifi_pkg) || tbl_rev != 0 || 389 wifi_pkg->package.elements[1].integer.value != ACPI_TYPE_INTEGER) 390 goto out_free; 391 392 *dflt_pwr_limit = wifi_pkg->package.elements[1].integer.value; 393 ret = 0; 394 out_free: 395 kfree(data); 396 out: 397 return ret; 398 } 399 400 int iwl_acpi_get_eckv(struct iwl_fw_runtime *fwrt, u32 *extl_clk) 401 { 402 union acpi_object *wifi_pkg, *data; 403 int ret, tbl_rev; 404 405 data = iwl_acpi_get_object(fwrt->dev, ACPI_ECKV_METHOD); 406 if (IS_ERR(data)) 407 return PTR_ERR(data); 408 409 wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data, 410 ACPI_ECKV_WIFI_DATA_SIZE, 411 &tbl_rev); 412 if (IS_ERR(wifi_pkg)) { 413 ret = PTR_ERR(wifi_pkg); 414 goto out_free; 415 } 416 417 if (wifi_pkg->package.elements[1].type != ACPI_TYPE_INTEGER || 418 tbl_rev != 0) { 419 ret = -EINVAL; 420 goto out_free; 421 } 422 423 *extl_clk = wifi_pkg->package.elements[1].integer.value; 424 425 ret = 0; 426 427 out_free: 428 kfree(data); 429 return ret; 430 } 431 432 static int iwl_acpi_sar_set_profile(union acpi_object *table, 433 struct iwl_sar_profile *profile, 434 bool enabled, u8 num_chains, 435 u8 num_sub_bands) 436 { 437 int i, j, idx = 0; 438 439 /* 440 * The table from ACPI is flat, but we store it in a 441 * structured array. 442 */ 443 for (i = 0; i < BIOS_SAR_MAX_CHAINS_PER_PROFILE; i++) { 444 for (j = 0; j < BIOS_SAR_MAX_SUB_BANDS_NUM; j++) { 445 /* if we don't have the values, use the default */ 446 if (i >= num_chains || j >= num_sub_bands) { 447 profile->chains[i].subbands[j] = 0; 448 } else { 449 if (table[idx].type != ACPI_TYPE_INTEGER || 450 table[idx].integer.value > U8_MAX) 451 return -EINVAL; 452 453 profile->chains[i].subbands[j] = 454 table[idx].integer.value; 455 456 idx++; 457 } 458 } 459 } 460 461 /* Only if all values were valid can the profile be enabled */ 462 profile->enabled = enabled; 463 464 return 0; 465 } 466 467 int iwl_acpi_get_wrds_table(struct iwl_fw_runtime *fwrt) 468 { 469 union acpi_object *wifi_pkg, *table, *data; 470 int ret, tbl_rev; 471 u32 flags; 472 u8 num_chains, num_sub_bands; 473 474 data = iwl_acpi_get_object(fwrt->dev, ACPI_WRDS_METHOD); 475 if (IS_ERR(data)) 476 return PTR_ERR(data); 477 478 /* start by trying to read revision 2 */ 479 wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data, 480 ACPI_WRDS_WIFI_DATA_SIZE_REV2, 481 &tbl_rev); 482 if (!IS_ERR(wifi_pkg)) { 483 if (tbl_rev != 2) { 484 ret = -EINVAL; 485 goto out_free; 486 } 487 488 num_chains = ACPI_SAR_NUM_CHAINS_REV2; 489 num_sub_bands = ACPI_SAR_NUM_SUB_BANDS_REV2; 490 491 goto read_table; 492 } 493 494 /* then try revision 1 */ 495 wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data, 496 ACPI_WRDS_WIFI_DATA_SIZE_REV1, 497 &tbl_rev); 498 if (!IS_ERR(wifi_pkg)) { 499 if (tbl_rev != 1) { 500 ret = -EINVAL; 501 goto out_free; 502 } 503 504 num_chains = ACPI_SAR_NUM_CHAINS_REV1; 505 num_sub_bands = ACPI_SAR_NUM_SUB_BANDS_REV1; 506 507 goto read_table; 508 } 509 510 /* then finally revision 0 */ 511 wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data, 512 ACPI_WRDS_WIFI_DATA_SIZE_REV0, 513 &tbl_rev); 514 if (!IS_ERR(wifi_pkg)) { 515 if (tbl_rev != 0) { 516 ret = -EINVAL; 517 goto out_free; 518 } 519 520 num_chains = ACPI_SAR_NUM_CHAINS_REV0; 521 num_sub_bands = ACPI_SAR_NUM_SUB_BANDS_REV0; 522 523 goto read_table; 524 } 525 526 ret = PTR_ERR(wifi_pkg); 527 goto out_free; 528 529 read_table: 530 if (wifi_pkg->package.elements[1].type != ACPI_TYPE_INTEGER) { 531 ret = -EINVAL; 532 goto out_free; 533 } 534 535 IWL_DEBUG_RADIO(fwrt, "Reading WRDS tbl_rev=%d\n", tbl_rev); 536 537 flags = wifi_pkg->package.elements[1].integer.value; 538 fwrt->reduced_power_flags = flags >> IWL_REDUCE_POWER_FLAGS_POS; 539 540 /* position of the actual table */ 541 table = &wifi_pkg->package.elements[2]; 542 543 /* The profile from WRDS is officially profile 1, but goes 544 * into sar_profiles[0] (because we don't have a profile 0). 545 */ 546 ret = iwl_acpi_sar_set_profile(table, &fwrt->sar_profiles[0], 547 flags & IWL_SAR_ENABLE_MSK, 548 num_chains, num_sub_bands); 549 out_free: 550 kfree(data); 551 return ret; 552 } 553 554 int iwl_acpi_get_ewrd_table(struct iwl_fw_runtime *fwrt) 555 { 556 union acpi_object *wifi_pkg, *data; 557 bool enabled; 558 int i, n_profiles, tbl_rev, pos; 559 int ret = 0; 560 u8 num_chains, num_sub_bands; 561 562 data = iwl_acpi_get_object(fwrt->dev, ACPI_EWRD_METHOD); 563 if (IS_ERR(data)) 564 return PTR_ERR(data); 565 566 /* start by trying to read revision 2 */ 567 wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data, 568 ACPI_EWRD_WIFI_DATA_SIZE_REV2, 569 &tbl_rev); 570 if (!IS_ERR(wifi_pkg)) { 571 if (tbl_rev != 2) { 572 ret = -EINVAL; 573 goto out_free; 574 } 575 576 num_chains = ACPI_SAR_NUM_CHAINS_REV2; 577 num_sub_bands = ACPI_SAR_NUM_SUB_BANDS_REV2; 578 579 goto read_table; 580 } 581 582 /* then try revision 1 */ 583 wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data, 584 ACPI_EWRD_WIFI_DATA_SIZE_REV1, 585 &tbl_rev); 586 if (!IS_ERR(wifi_pkg)) { 587 if (tbl_rev != 1) { 588 ret = -EINVAL; 589 goto out_free; 590 } 591 592 num_chains = ACPI_SAR_NUM_CHAINS_REV1; 593 num_sub_bands = ACPI_SAR_NUM_SUB_BANDS_REV1; 594 595 goto read_table; 596 } 597 598 /* then finally revision 0 */ 599 wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data, 600 ACPI_EWRD_WIFI_DATA_SIZE_REV0, 601 &tbl_rev); 602 if (!IS_ERR(wifi_pkg)) { 603 if (tbl_rev != 0) { 604 ret = -EINVAL; 605 goto out_free; 606 } 607 608 num_chains = ACPI_SAR_NUM_CHAINS_REV0; 609 num_sub_bands = ACPI_SAR_NUM_SUB_BANDS_REV0; 610 611 goto read_table; 612 } 613 614 ret = PTR_ERR(wifi_pkg); 615 goto out_free; 616 617 read_table: 618 if (wifi_pkg->package.elements[1].type != ACPI_TYPE_INTEGER || 619 wifi_pkg->package.elements[2].type != ACPI_TYPE_INTEGER) { 620 ret = -EINVAL; 621 goto out_free; 622 } 623 624 enabled = !!(wifi_pkg->package.elements[1].integer.value); 625 n_profiles = wifi_pkg->package.elements[2].integer.value; 626 627 /* 628 * Check the validity of n_profiles. The EWRD profiles start 629 * from index 1, so the maximum value allowed here is 630 * ACPI_SAR_PROFILES_NUM - 1. 631 */ 632 if (n_profiles >= BIOS_SAR_MAX_PROFILE_NUM) { 633 ret = -EINVAL; 634 goto out_free; 635 } 636 637 /* the tables start at element 3 */ 638 pos = 3; 639 640 for (i = 0; i < n_profiles; i++) { 641 union acpi_object *table = &wifi_pkg->package.elements[pos]; 642 /* The EWRD profiles officially go from 2 to 4, but we 643 * save them in sar_profiles[1-3] (because we don't 644 * have profile 0). So in the array we start from 1. 645 */ 646 ret = iwl_acpi_sar_set_profile(table, 647 &fwrt->sar_profiles[i + 1], 648 enabled, num_chains, 649 num_sub_bands); 650 if (ret < 0) 651 break; 652 653 /* go to the next table */ 654 pos += num_chains * num_sub_bands; 655 } 656 657 out_free: 658 kfree(data); 659 return ret; 660 } 661 662 int iwl_acpi_get_wgds_table(struct iwl_fw_runtime *fwrt) 663 { 664 union acpi_object *wifi_pkg, *data; 665 int i, j, k, ret, tbl_rev; 666 u8 num_bands, num_profiles; 667 static const struct { 668 u8 revisions; 669 u8 bands; 670 u8 profiles; 671 u8 min_profiles; 672 } rev_data[] = { 673 { 674 .revisions = BIT(3), 675 .bands = ACPI_GEO_NUM_BANDS_REV2, 676 .profiles = ACPI_NUM_GEO_PROFILES_REV3, 677 .min_profiles = BIOS_GEO_MIN_PROFILE_NUM, 678 }, 679 { 680 .revisions = BIT(2), 681 .bands = ACPI_GEO_NUM_BANDS_REV2, 682 .profiles = ACPI_NUM_GEO_PROFILES, 683 }, 684 { 685 .revisions = BIT(0) | BIT(1), 686 .bands = ACPI_GEO_NUM_BANDS_REV0, 687 .profiles = ACPI_NUM_GEO_PROFILES, 688 }, 689 }; 690 int idx; 691 /* start from one to skip the domain */ 692 int entry_idx = 1; 693 694 BUILD_BUG_ON(ACPI_NUM_GEO_PROFILES_REV3 != IWL_NUM_GEO_PROFILES_V3); 695 BUILD_BUG_ON(ACPI_NUM_GEO_PROFILES != IWL_NUM_GEO_PROFILES); 696 697 data = iwl_acpi_get_object(fwrt->dev, ACPI_WGDS_METHOD); 698 if (IS_ERR(data)) 699 return PTR_ERR(data); 700 701 /* read the highest revision we understand first */ 702 for (idx = 0; idx < ARRAY_SIZE(rev_data); idx++) { 703 /* min_profiles != 0 requires num_profiles header */ 704 u32 hdr_size = 1 + !!rev_data[idx].min_profiles; 705 u32 profile_size = ACPI_GEO_PER_CHAIN_SIZE * 706 rev_data[idx].bands; 707 u32 max_size = hdr_size + profile_size * rev_data[idx].profiles; 708 u32 min_size; 709 710 if (!rev_data[idx].min_profiles) 711 min_size = max_size; 712 else 713 min_size = hdr_size + 714 profile_size * rev_data[idx].min_profiles; 715 716 wifi_pkg = iwl_acpi_get_wifi_pkg_range(fwrt->dev, data, 717 min_size, max_size, 718 &tbl_rev); 719 if (!IS_ERR(wifi_pkg)) { 720 if (!(BIT(tbl_rev) & rev_data[idx].revisions)) 721 continue; 722 723 num_bands = rev_data[idx].bands; 724 num_profiles = rev_data[idx].profiles; 725 726 if (rev_data[idx].min_profiles) { 727 /* read header that says # of profiles */ 728 union acpi_object *entry; 729 730 entry = &wifi_pkg->package.elements[entry_idx]; 731 entry_idx++; 732 if (entry->type != ACPI_TYPE_INTEGER || 733 entry->integer.value > num_profiles || 734 entry->integer.value < 735 rev_data[idx].min_profiles) { 736 ret = -EINVAL; 737 goto out_free; 738 } 739 740 /* 741 * Check to see if we received package count 742 * same as max # of profiles 743 */ 744 if (wifi_pkg->package.count != 745 hdr_size + profile_size * num_profiles) { 746 ret = -EINVAL; 747 goto out_free; 748 } 749 750 /* Number of valid profiles */ 751 num_profiles = entry->integer.value; 752 } 753 goto read_table; 754 } 755 } 756 757 if (idx < ARRAY_SIZE(rev_data)) 758 ret = PTR_ERR(wifi_pkg); 759 else 760 ret = -ENOENT; 761 goto out_free; 762 763 read_table: 764 fwrt->geo_rev = tbl_rev; 765 for (i = 0; i < num_profiles; i++) { 766 for (j = 0; j < BIOS_GEO_MAX_NUM_BANDS; j++) { 767 union acpi_object *entry; 768 769 /* 770 * num_bands is either 2 or 3, if it's only 2 then 771 * fill the third band (6 GHz) with the values from 772 * 5 GHz (second band) 773 */ 774 if (j >= num_bands) { 775 fwrt->geo_profiles[i].bands[j].max = 776 fwrt->geo_profiles[i].bands[1].max; 777 } else { 778 entry = &wifi_pkg->package.elements[entry_idx]; 779 entry_idx++; 780 if (entry->type != ACPI_TYPE_INTEGER || 781 entry->integer.value > U8_MAX) { 782 ret = -EINVAL; 783 goto out_free; 784 } 785 786 fwrt->geo_profiles[i].bands[j].max = 787 entry->integer.value; 788 } 789 790 for (k = 0; k < BIOS_GEO_NUM_CHAINS; k++) { 791 /* same here as above */ 792 if (j >= num_bands) { 793 fwrt->geo_profiles[i].bands[j].chains[k] = 794 fwrt->geo_profiles[i].bands[1].chains[k]; 795 } else { 796 entry = &wifi_pkg->package.elements[entry_idx]; 797 entry_idx++; 798 if (entry->type != ACPI_TYPE_INTEGER || 799 entry->integer.value > U8_MAX) { 800 ret = -EINVAL; 801 goto out_free; 802 } 803 804 fwrt->geo_profiles[i].bands[j].chains[k] = 805 entry->integer.value; 806 } 807 } 808 } 809 } 810 811 fwrt->geo_num_profiles = num_profiles; 812 fwrt->geo_enabled = true; 813 ret = 0; 814 out_free: 815 kfree(data); 816 return ret; 817 } 818 819 int iwl_acpi_get_ppag_table(struct iwl_fw_runtime *fwrt) 820 { 821 union acpi_object *wifi_pkg, *data, *flags; 822 int i, j, ret, tbl_rev, num_sub_bands = 0; 823 int idx = 2; 824 825 data = iwl_acpi_get_object(fwrt->dev, ACPI_PPAG_METHOD); 826 if (IS_ERR(data)) 827 return PTR_ERR(data); 828 829 /* try to read ppag table rev 3, 2 or 1 (all have the same data size) */ 830 wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data, 831 ACPI_PPAG_WIFI_DATA_SIZE_V2, &tbl_rev); 832 833 if (!IS_ERR(wifi_pkg)) { 834 if (tbl_rev >= 1 && tbl_rev <= 3) { 835 num_sub_bands = IWL_NUM_SUB_BANDS_V2; 836 IWL_DEBUG_RADIO(fwrt, 837 "Reading PPAG table (tbl_rev=%d)\n", 838 tbl_rev); 839 goto read_table; 840 } else { 841 ret = -EINVAL; 842 goto out_free; 843 } 844 } 845 846 /* try to read ppag table revision 0 */ 847 wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data, 848 ACPI_PPAG_WIFI_DATA_SIZE_V1, &tbl_rev); 849 850 if (!IS_ERR(wifi_pkg)) { 851 if (tbl_rev != 0) { 852 ret = -EINVAL; 853 goto out_free; 854 } 855 num_sub_bands = IWL_NUM_SUB_BANDS_V1; 856 IWL_DEBUG_RADIO(fwrt, "Reading PPAG table v1 (tbl_rev=0)\n"); 857 goto read_table; 858 } 859 860 ret = PTR_ERR(wifi_pkg); 861 goto out_free; 862 863 read_table: 864 fwrt->ppag_ver = tbl_rev; 865 flags = &wifi_pkg->package.elements[1]; 866 867 if (flags->type != ACPI_TYPE_INTEGER) { 868 ret = -EINVAL; 869 goto out_free; 870 } 871 872 fwrt->ppag_flags = iwl_bios_get_ppag_flags(flags->integer.value, 873 fwrt->ppag_ver); 874 875 /* 876 * read, verify gain values and save them into the PPAG table. 877 * first sub-band (j=0) corresponds to Low-Band (2.4GHz), and the 878 * following sub-bands to High-Band (5GHz). 879 */ 880 for (i = 0; i < IWL_NUM_CHAIN_LIMITS; i++) { 881 for (j = 0; j < num_sub_bands; j++) { 882 union acpi_object *ent; 883 884 ent = &wifi_pkg->package.elements[idx++]; 885 if (ent->type != ACPI_TYPE_INTEGER) { 886 ret = -EINVAL; 887 goto out_free; 888 } 889 890 fwrt->ppag_chains[i].subbands[j] = ent->integer.value; 891 } 892 } 893 894 ret = 0; 895 896 out_free: 897 kfree(data); 898 return ret; 899 } 900 901 void iwl_acpi_get_phy_filters(struct iwl_fw_runtime *fwrt, 902 struct iwl_phy_specific_cfg *filters) 903 { 904 struct iwl_phy_specific_cfg tmp = {}; 905 union acpi_object *wifi_pkg, *data; 906 int tbl_rev, i; 907 908 data = iwl_acpi_get_object(fwrt->dev, ACPI_WPFC_METHOD); 909 if (IS_ERR(data)) 910 return; 911 912 wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data, 913 ACPI_WPFC_WIFI_DATA_SIZE, 914 &tbl_rev); 915 if (IS_ERR(wifi_pkg)) 916 goto out_free; 917 918 if (tbl_rev != 0) 919 goto out_free; 920 921 BUILD_BUG_ON(ARRAY_SIZE(filters->filter_cfg_chains) != 922 ACPI_WPFC_WIFI_DATA_SIZE - 1); 923 924 for (i = 0; i < ARRAY_SIZE(filters->filter_cfg_chains); i++) { 925 if (wifi_pkg->package.elements[i + 1].type != ACPI_TYPE_INTEGER) 926 goto out_free; 927 tmp.filter_cfg_chains[i] = 928 cpu_to_le32(wifi_pkg->package.elements[i + 1].integer.value); 929 } 930 931 IWL_DEBUG_RADIO(fwrt, "Loaded WPFC filter config from ACPI\n"); 932 *filters = tmp; 933 out_free: 934 kfree(data); 935 } 936 IWL_EXPORT_SYMBOL(iwl_acpi_get_phy_filters); 937 938 void iwl_acpi_get_guid_lock_status(struct iwl_fw_runtime *fwrt) 939 { 940 union acpi_object *wifi_pkg, *data; 941 int tbl_rev; 942 943 data = iwl_acpi_get_object(fwrt->dev, ACPI_GLAI_METHOD); 944 if (IS_ERR(data)) 945 return; 946 947 wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data, 948 ACPI_GLAI_WIFI_DATA_SIZE, 949 &tbl_rev); 950 if (IS_ERR(wifi_pkg)) 951 goto out_free; 952 953 if (tbl_rev != 0) { 954 IWL_DEBUG_RADIO(fwrt, "Invalid GLAI revision: %d\n", tbl_rev); 955 goto out_free; 956 } 957 958 if (wifi_pkg->package.elements[1].type != ACPI_TYPE_INTEGER || 959 wifi_pkg->package.elements[1].integer.value > ACPI_GLAI_MAX_STATUS) 960 goto out_free; 961 962 fwrt->uefi_tables_lock_status = 963 wifi_pkg->package.elements[1].integer.value; 964 965 IWL_DEBUG_RADIO(fwrt, 966 "Loaded UEFI WIFI GUID lock status: %d from ACPI\n", 967 fwrt->uefi_tables_lock_status); 968 out_free: 969 kfree(data); 970 } 971 IWL_EXPORT_SYMBOL(iwl_acpi_get_guid_lock_status); 972 973 int iwl_acpi_get_wbem(struct iwl_fw_runtime *fwrt, u32 *value) 974 { 975 union acpi_object *wifi_pkg, *data; 976 int ret = -ENOENT; 977 int tbl_rev; 978 979 data = iwl_acpi_get_object(fwrt->dev, ACPI_WBEM_METHOD); 980 if (IS_ERR(data)) 981 return ret; 982 983 wifi_pkg = iwl_acpi_get_wifi_pkg(fwrt->dev, data, 984 ACPI_WBEM_WIFI_DATA_SIZE, 985 &tbl_rev); 986 if (IS_ERR(wifi_pkg)) 987 goto out_free; 988 989 if (tbl_rev != IWL_ACPI_WBEM_REVISION) { 990 IWL_DEBUG_RADIO(fwrt, "Unsupported ACPI WBEM revision:%d\n", 991 tbl_rev); 992 goto out_free; 993 } 994 995 if (wifi_pkg->package.elements[1].type != ACPI_TYPE_INTEGER) 996 goto out_free; 997 998 *value = wifi_pkg->package.elements[1].integer.value & 999 IWL_ACPI_WBEM_REV0_MASK; 1000 IWL_DEBUG_RADIO(fwrt, "Loaded WBEM config from ACPI\n"); 1001 ret = 0; 1002 out_free: 1003 kfree(data); 1004 return ret; 1005 } 1006