1// SPDX-License-Identifier: GPL-2.0-only 2/* 3 * drivers/acpi/resource.c - ACPI device resources interpretation. 4 * 5 * Copyright (C) 2012, Intel Corp. 6 * Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com> 7 * 8 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 9 * 10 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 11 */ 12 13#include <linux/acpi.h> 14#include <linux/device.h> 15#include <linux/export.h> 16#include <linux/ioport.h> 17#include <linux/slab.h> 18#include <linux/irq.h> 19#include <linux/dmi.h> 20 21#ifdef CONFIG_X86 22#define valid_IRQ(i) (((i) != 0) && ((i) != 2)) 23static inline bool acpi_iospace_resource_valid(struct resource *res) 24{ 25 /* On X86 IO space is limited to the [0 - 64K] IO port range */ 26 return res->end < 0x10003; 27} 28#else 29#define valid_IRQ(i) (true) 30/* 31 * ACPI IO descriptors on arches other than X86 contain MMIO CPU physical 32 * addresses mapping IO space in CPU physical address space, IO space 33 * resources can be placed anywhere in the 64-bit physical address space. 34 */ 35static inline bool 36acpi_iospace_resource_valid(struct resource *res) { return true; } 37#endif 38 39#if IS_ENABLED(CONFIG_ACPI_GENERIC_GSI) 40static inline bool is_gsi(struct acpi_resource_extended_irq *ext_irq) 41{ 42 return ext_irq->resource_source.string_length == 0 && 43 ext_irq->producer_consumer == ACPI_CONSUMER; 44} 45#else 46static inline bool is_gsi(struct acpi_resource_extended_irq *ext_irq) 47{ 48 return true; 49} 50#endif 51 52static bool acpi_dev_resource_len_valid(u64 start, u64 end, u64 len, bool io) 53{ 54 u64 reslen = end - start + 1; 55 56 /* 57 * CHECKME: len might be required to check versus a minimum 58 * length as well. 1 for io is fine, but for memory it does 59 * not make any sense at all. 60 * Note: some BIOSes report incorrect length for ACPI address space 61 * descriptor, so remove check of 'reslen == len' to avoid regression. 62 */ 63 if (len && reslen && start <= end) 64 return true; 65 66 pr_debug("ACPI: invalid or unassigned resource %s [%016llx - %016llx] length [%016llx]\n", 67 io ? "io" : "mem", start, end, len); 68 69 return false; 70} 71 72static void acpi_dev_memresource_flags(struct resource *res, u64 len, 73 u8 write_protect) 74{ 75 res->flags = IORESOURCE_MEM; 76 77 if (!acpi_dev_resource_len_valid(res->start, res->end, len, false)) 78 res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET; 79 80 if (write_protect == ACPI_READ_WRITE_MEMORY) 81 res->flags |= IORESOURCE_MEM_WRITEABLE; 82} 83 84static void acpi_dev_get_memresource(struct resource *res, u64 start, u64 len, 85 u8 write_protect) 86{ 87 res->start = start; 88 res->end = start + len - 1; 89 acpi_dev_memresource_flags(res, len, write_protect); 90} 91 92/** 93 * acpi_dev_resource_memory - Extract ACPI memory resource information. 94 * @ares: Input ACPI resource object. 95 * @res: Output generic resource object. 96 * 97 * Check if the given ACPI resource object represents a memory resource and 98 * if that's the case, use the information in it to populate the generic 99 * resource object pointed to by @res. 100 * 101 * Return: 102 * 1) false with res->flags setting to zero: not the expected resource type 103 * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource 104 * 3) true: valid assigned resource 105 */ 106bool acpi_dev_resource_memory(struct acpi_resource *ares, struct resource *res) 107{ 108 struct acpi_resource_memory24 *memory24; 109 struct acpi_resource_memory32 *memory32; 110 struct acpi_resource_fixed_memory32 *fixed_memory32; 111 112 switch (ares->type) { 113 case ACPI_RESOURCE_TYPE_MEMORY24: 114 memory24 = &ares->data.memory24; 115 acpi_dev_get_memresource(res, memory24->minimum << 8, 116 memory24->address_length << 8, 117 memory24->write_protect); 118 break; 119 case ACPI_RESOURCE_TYPE_MEMORY32: 120 memory32 = &ares->data.memory32; 121 acpi_dev_get_memresource(res, memory32->minimum, 122 memory32->address_length, 123 memory32->write_protect); 124 break; 125 case ACPI_RESOURCE_TYPE_FIXED_MEMORY32: 126 fixed_memory32 = &ares->data.fixed_memory32; 127 acpi_dev_get_memresource(res, fixed_memory32->address, 128 fixed_memory32->address_length, 129 fixed_memory32->write_protect); 130 break; 131 default: 132 res->flags = 0; 133 return false; 134 } 135 136 return !(res->flags & IORESOURCE_DISABLED); 137} 138EXPORT_SYMBOL_GPL(acpi_dev_resource_memory); 139 140static void acpi_dev_ioresource_flags(struct resource *res, u64 len, 141 u8 io_decode, u8 translation_type) 142{ 143 res->flags = IORESOURCE_IO; 144 145 if (!acpi_dev_resource_len_valid(res->start, res->end, len, true)) 146 res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET; 147 148 if (!acpi_iospace_resource_valid(res)) 149 res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET; 150 151 if (io_decode == ACPI_DECODE_16) 152 res->flags |= IORESOURCE_IO_16BIT_ADDR; 153 if (translation_type == ACPI_SPARSE_TRANSLATION) 154 res->flags |= IORESOURCE_IO_SPARSE; 155} 156 157static void acpi_dev_get_ioresource(struct resource *res, u64 start, u64 len, 158 u8 io_decode) 159{ 160 res->start = start; 161 res->end = start + len - 1; 162 acpi_dev_ioresource_flags(res, len, io_decode, 0); 163} 164 165/** 166 * acpi_dev_resource_io - Extract ACPI I/O resource information. 167 * @ares: Input ACPI resource object. 168 * @res: Output generic resource object. 169 * 170 * Check if the given ACPI resource object represents an I/O resource and 171 * if that's the case, use the information in it to populate the generic 172 * resource object pointed to by @res. 173 * 174 * Return: 175 * 1) false with res->flags setting to zero: not the expected resource type 176 * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource 177 * 3) true: valid assigned resource 178 */ 179bool acpi_dev_resource_io(struct acpi_resource *ares, struct resource *res) 180{ 181 struct acpi_resource_io *io; 182 struct acpi_resource_fixed_io *fixed_io; 183 184 switch (ares->type) { 185 case ACPI_RESOURCE_TYPE_IO: 186 io = &ares->data.io; 187 acpi_dev_get_ioresource(res, io->minimum, 188 io->address_length, 189 io->io_decode); 190 break; 191 case ACPI_RESOURCE_TYPE_FIXED_IO: 192 fixed_io = &ares->data.fixed_io; 193 acpi_dev_get_ioresource(res, fixed_io->address, 194 fixed_io->address_length, 195 ACPI_DECODE_10); 196 break; 197 default: 198 res->flags = 0; 199 return false; 200 } 201 202 return !(res->flags & IORESOURCE_DISABLED); 203} 204EXPORT_SYMBOL_GPL(acpi_dev_resource_io); 205 206static bool acpi_decode_space(struct resource_win *win, 207 struct acpi_resource_address *addr, 208 struct acpi_address64_attribute *attr) 209{ 210 u8 iodec = attr->granularity == 0xfff ? ACPI_DECODE_10 : ACPI_DECODE_16; 211 bool wp = addr->info.mem.write_protect; 212 u64 len = attr->address_length; 213 u64 start, end, offset = 0; 214 struct resource *res = &win->res; 215 216 /* 217 * Filter out invalid descriptor according to ACPI Spec 5.0, section 218 * 6.4.3.5 Address Space Resource Descriptors. 219 */ 220 if ((addr->min_address_fixed != addr->max_address_fixed && len) || 221 (addr->min_address_fixed && addr->max_address_fixed && !len)) 222 pr_debug("ACPI: Invalid address space min_addr_fix %d, max_addr_fix %d, len %llx\n", 223 addr->min_address_fixed, addr->max_address_fixed, len); 224 225 /* 226 * For bridges that translate addresses across the bridge, 227 * translation_offset is the offset that must be added to the 228 * address on the secondary side to obtain the address on the 229 * primary side. Non-bridge devices must list 0 for all Address 230 * Translation offset bits. 231 */ 232 if (addr->producer_consumer == ACPI_PRODUCER) 233 offset = attr->translation_offset; 234 else if (attr->translation_offset) 235 pr_debug("ACPI: translation_offset(%lld) is invalid for non-bridge device.\n", 236 attr->translation_offset); 237 start = attr->minimum + offset; 238 end = attr->maximum + offset; 239 240 win->offset = offset; 241 res->start = start; 242 res->end = end; 243 if (sizeof(resource_size_t) < sizeof(u64) && 244 (offset != win->offset || start != res->start || end != res->end)) { 245 pr_warn("acpi resource window ([%#llx-%#llx] ignored, not CPU addressable)\n", 246 attr->minimum, attr->maximum); 247 return false; 248 } 249 250 switch (addr->resource_type) { 251 case ACPI_MEMORY_RANGE: 252 acpi_dev_memresource_flags(res, len, wp); 253 break; 254 case ACPI_IO_RANGE: 255 acpi_dev_ioresource_flags(res, len, iodec, 256 addr->info.io.translation_type); 257 break; 258 case ACPI_BUS_NUMBER_RANGE: 259 res->flags = IORESOURCE_BUS; 260 break; 261 default: 262 return false; 263 } 264 265 if (addr->producer_consumer == ACPI_PRODUCER) 266 res->flags |= IORESOURCE_WINDOW; 267 268 if (addr->info.mem.caching == ACPI_PREFETCHABLE_MEMORY) 269 res->flags |= IORESOURCE_PREFETCH; 270 271 return !(res->flags & IORESOURCE_DISABLED); 272} 273 274/** 275 * acpi_dev_resource_address_space - Extract ACPI address space information. 276 * @ares: Input ACPI resource object. 277 * @win: Output generic resource object. 278 * 279 * Check if the given ACPI resource object represents an address space resource 280 * and if that's the case, use the information in it to populate the generic 281 * resource object pointed to by @win. 282 * 283 * Return: 284 * 1) false with win->res.flags setting to zero: not the expected resource type 285 * 2) false with IORESOURCE_DISABLED in win->res.flags: valid unassigned 286 * resource 287 * 3) true: valid assigned resource 288 */ 289bool acpi_dev_resource_address_space(struct acpi_resource *ares, 290 struct resource_win *win) 291{ 292 struct acpi_resource_address64 addr; 293 294 win->res.flags = 0; 295 if (ACPI_FAILURE(acpi_resource_to_address64(ares, &addr))) 296 return false; 297 298 return acpi_decode_space(win, (struct acpi_resource_address *)&addr, 299 &addr.address); 300} 301EXPORT_SYMBOL_GPL(acpi_dev_resource_address_space); 302 303/** 304 * acpi_dev_resource_ext_address_space - Extract ACPI address space information. 305 * @ares: Input ACPI resource object. 306 * @win: Output generic resource object. 307 * 308 * Check if the given ACPI resource object represents an extended address space 309 * resource and if that's the case, use the information in it to populate the 310 * generic resource object pointed to by @win. 311 * 312 * Return: 313 * 1) false with win->res.flags setting to zero: not the expected resource type 314 * 2) false with IORESOURCE_DISABLED in win->res.flags: valid unassigned 315 * resource 316 * 3) true: valid assigned resource 317 */ 318bool acpi_dev_resource_ext_address_space(struct acpi_resource *ares, 319 struct resource_win *win) 320{ 321 struct acpi_resource_extended_address64 *ext_addr; 322 323 win->res.flags = 0; 324 if (ares->type != ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64) 325 return false; 326 327 ext_addr = &ares->data.ext_address64; 328 329 return acpi_decode_space(win, (struct acpi_resource_address *)ext_addr, 330 &ext_addr->address); 331} 332EXPORT_SYMBOL_GPL(acpi_dev_resource_ext_address_space); 333 334/** 335 * acpi_dev_irq_flags - Determine IRQ resource flags. 336 * @triggering: Triggering type as provided by ACPI. 337 * @polarity: Interrupt polarity as provided by ACPI. 338 * @shareable: Whether or not the interrupt is shareable. 339 * @wake_capable: Wake capability as provided by ACPI. 340 */ 341unsigned long acpi_dev_irq_flags(u8 triggering, u8 polarity, u8 shareable, u8 wake_capable) 342{ 343 unsigned long flags; 344 345 if (triggering == ACPI_LEVEL_SENSITIVE) 346 flags = polarity == ACPI_ACTIVE_LOW ? 347 IORESOURCE_IRQ_LOWLEVEL : IORESOURCE_IRQ_HIGHLEVEL; 348 else 349 flags = polarity == ACPI_ACTIVE_LOW ? 350 IORESOURCE_IRQ_LOWEDGE : IORESOURCE_IRQ_HIGHEDGE; 351 352 if (shareable == ACPI_SHARED) 353 flags |= IORESOURCE_IRQ_SHAREABLE; 354 355 if (wake_capable == ACPI_WAKE_CAPABLE) 356 flags |= IORESOURCE_IRQ_WAKECAPABLE; 357 358 return flags | IORESOURCE_IRQ; 359} 360EXPORT_SYMBOL_GPL(acpi_dev_irq_flags); 361 362/** 363 * acpi_dev_get_irq_type - Determine irq type. 364 * @triggering: Triggering type as provided by ACPI. 365 * @polarity: Interrupt polarity as provided by ACPI. 366 */ 367unsigned int acpi_dev_get_irq_type(int triggering, int polarity) 368{ 369 switch (polarity) { 370 case ACPI_ACTIVE_LOW: 371 return triggering == ACPI_EDGE_SENSITIVE ? 372 IRQ_TYPE_EDGE_FALLING : 373 IRQ_TYPE_LEVEL_LOW; 374 case ACPI_ACTIVE_HIGH: 375 return triggering == ACPI_EDGE_SENSITIVE ? 376 IRQ_TYPE_EDGE_RISING : 377 IRQ_TYPE_LEVEL_HIGH; 378 case ACPI_ACTIVE_BOTH: 379 if (triggering == ACPI_EDGE_SENSITIVE) 380 return IRQ_TYPE_EDGE_BOTH; 381 fallthrough; 382 default: 383 return IRQ_TYPE_NONE; 384 } 385} 386EXPORT_SYMBOL_GPL(acpi_dev_get_irq_type); 387 388static const struct dmi_system_id medion_laptop[] = { 389 { 390 .ident = "MEDION P15651", 391 .matches = { 392 DMI_MATCH(DMI_SYS_VENDOR, "MEDION"), 393 DMI_MATCH(DMI_BOARD_NAME, "M15T"), 394 }, 395 }, 396 { 397 .ident = "MEDION S17405", 398 .matches = { 399 DMI_MATCH(DMI_SYS_VENDOR, "MEDION"), 400 DMI_MATCH(DMI_BOARD_NAME, "M17T"), 401 }, 402 }, 403 { 404 .ident = "MEDION S17413", 405 .matches = { 406 DMI_MATCH(DMI_SYS_VENDOR, "MEDION"), 407 DMI_MATCH(DMI_BOARD_NAME, "M1xA"), 408 }, 409 }, 410 { } 411}; 412 413static const struct dmi_system_id asus_laptop[] = { 414 { 415 .ident = "Asus Vivobook K3402ZA", 416 .matches = { 417 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 418 DMI_MATCH(DMI_BOARD_NAME, "K3402ZA"), 419 }, 420 }, 421 { 422 .ident = "Asus Vivobook K3502ZA", 423 .matches = { 424 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 425 DMI_MATCH(DMI_BOARD_NAME, "K3502ZA"), 426 }, 427 }, 428 { 429 .ident = "Asus Vivobook S5402ZA", 430 .matches = { 431 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 432 DMI_MATCH(DMI_BOARD_NAME, "S5402ZA"), 433 }, 434 }, 435 { 436 .ident = "Asus Vivobook S5602ZA", 437 .matches = { 438 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 439 DMI_MATCH(DMI_BOARD_NAME, "S5602ZA"), 440 }, 441 }, 442 { 443 .ident = "Asus ExpertBook B1402CBA", 444 .matches = { 445 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 446 DMI_MATCH(DMI_BOARD_NAME, "B1402CBA"), 447 }, 448 }, 449 { 450 /* Asus ExpertBook B1402CVA */ 451 .matches = { 452 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 453 DMI_MATCH(DMI_BOARD_NAME, "B1402CVA"), 454 }, 455 }, 456 { 457 .ident = "Asus ExpertBook B1502CBA", 458 .matches = { 459 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 460 DMI_MATCH(DMI_BOARD_NAME, "B1502CBA"), 461 }, 462 }, 463 { 464 .ident = "Asus ExpertBook B2402CBA", 465 .matches = { 466 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 467 DMI_MATCH(DMI_BOARD_NAME, "B2402CBA"), 468 }, 469 }, 470 { 471 .ident = "Asus ExpertBook B2402FBA", 472 .matches = { 473 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 474 DMI_MATCH(DMI_BOARD_NAME, "B2402FBA"), 475 }, 476 }, 477 { 478 .ident = "Asus ExpertBook B2502", 479 .matches = { 480 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 481 DMI_MATCH(DMI_BOARD_NAME, "B2502CBA"), 482 }, 483 }, 484 { } 485}; 486 487static const struct dmi_system_id tongfang_gm_rg[] = { 488 { 489 .ident = "TongFang GMxRGxx/XMG CORE 15 (M22)/TUXEDO Stellaris 15 Gen4 AMD", 490 .matches = { 491 DMI_MATCH(DMI_BOARD_NAME, "GMxRGxx"), 492 }, 493 }, 494 { } 495}; 496 497static const struct dmi_system_id maingear_laptop[] = { 498 { 499 .ident = "MAINGEAR Vector Pro 2 15", 500 .matches = { 501 DMI_MATCH(DMI_SYS_VENDOR, "Micro Electronics Inc"), 502 DMI_MATCH(DMI_PRODUCT_NAME, "MG-VCP2-15A3070T"), 503 } 504 }, 505 { 506 /* TongFang GMxXGxx/TUXEDO Polaris 15 Gen5 AMD */ 507 .matches = { 508 DMI_MATCH(DMI_BOARD_NAME, "GMxXGxx"), 509 }, 510 }, 511 { 512 /* TongFang GMxXGxx sold as Eluktronics Inc. RP-15 */ 513 .matches = { 514 DMI_MATCH(DMI_SYS_VENDOR, "Eluktronics Inc."), 515 DMI_MATCH(DMI_BOARD_NAME, "RP-15"), 516 }, 517 }, 518 { 519 /* TongFang GM6XGxX/TUXEDO Stellaris 16 Gen5 AMD */ 520 .matches = { 521 DMI_MATCH(DMI_BOARD_NAME, "GM6XGxX"), 522 }, 523 }, 524 { 525 .ident = "MAINGEAR Vector Pro 2 17", 526 .matches = { 527 DMI_MATCH(DMI_SYS_VENDOR, "Micro Electronics Inc"), 528 DMI_MATCH(DMI_PRODUCT_NAME, "MG-VCP2-17A3070T"), 529 }, 530 }, 531 { } 532}; 533 534static const struct dmi_system_id pcspecialist_laptop[] = { 535 { 536 /* TongFang GM6BGEQ / PCSpecialist Elimina Pro 16 M, RTX 3050 */ 537 .matches = { 538 DMI_MATCH(DMI_BOARD_NAME, "GM6BGEQ"), 539 }, 540 }, 541 { 542 /* TongFang GM6BG5Q, RTX 4050 */ 543 .matches = { 544 DMI_MATCH(DMI_BOARD_NAME, "GM6BG5Q"), 545 }, 546 }, 547 { 548 /* TongFang GM6BG0Q / PCSpecialist Elimina Pro 16 M, RTX 4060 */ 549 .matches = { 550 DMI_MATCH(DMI_BOARD_NAME, "GM6BG0Q"), 551 }, 552 }, 553 { 554 /* Infinity E15-5A165-BM */ 555 .matches = { 556 DMI_MATCH(DMI_BOARD_NAME, "GM5RG1E0009COM"), 557 }, 558 }, 559 { 560 /* Infinity E15-5A305-1M */ 561 .matches = { 562 DMI_MATCH(DMI_BOARD_NAME, "GM5RGEE0016COM"), 563 }, 564 }, 565 { 566 /* Lunnen Ground 15 / AMD Ryzen 5 5500U */ 567 .matches = { 568 DMI_MATCH(DMI_SYS_VENDOR, "Lunnen"), 569 DMI_MATCH(DMI_BOARD_NAME, "LLL5DAW"), 570 }, 571 }, 572 { 573 /* Lunnen Ground 16 / AMD Ryzen 7 5800U */ 574 .matches = { 575 DMI_MATCH(DMI_SYS_VENDOR, "Lunnen"), 576 DMI_MATCH(DMI_BOARD_NAME, "LL6FA"), 577 }, 578 }, 579 { 580 /* MAIBENBEN X577 */ 581 .matches = { 582 DMI_MATCH(DMI_SYS_VENDOR, "MAIBENBEN"), 583 DMI_MATCH(DMI_BOARD_NAME, "X577"), 584 }, 585 }, 586 { } 587}; 588 589static const struct dmi_system_id lg_laptop[] = { 590 { 591 .ident = "LG Electronics 17U70P", 592 .matches = { 593 DMI_MATCH(DMI_SYS_VENDOR, "LG Electronics"), 594 DMI_MATCH(DMI_BOARD_NAME, "17U70P"), 595 }, 596 }, 597 { } 598}; 599 600struct irq_override_cmp { 601 const struct dmi_system_id *system; 602 unsigned char irq; 603 unsigned char triggering; 604 unsigned char polarity; 605 unsigned char shareable; 606 bool override; 607}; 608 609static const struct irq_override_cmp override_table[] = { 610 { medion_laptop, 1, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW, 0, false }, 611 { asus_laptop, 1, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW, 0, false }, 612 { tongfang_gm_rg, 1, ACPI_EDGE_SENSITIVE, ACPI_ACTIVE_LOW, 1, true }, 613 { maingear_laptop, 1, ACPI_EDGE_SENSITIVE, ACPI_ACTIVE_LOW, 1, true }, 614 { pcspecialist_laptop, 1, ACPI_EDGE_SENSITIVE, ACPI_ACTIVE_LOW, 1, true }, 615 { lg_laptop, 1, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW, 0, false }, 616}; 617 618static bool acpi_dev_irq_override(u32 gsi, u8 triggering, u8 polarity, 619 u8 shareable) 620{ 621 int i; 622 623 for (i = 0; i < ARRAY_SIZE(override_table); i++) { 624 const struct irq_override_cmp *entry = &override_table[i]; 625 626 if (dmi_check_system(entry->system) && 627 entry->irq == gsi && 628 entry->triggering == triggering && 629 entry->polarity == polarity && 630 entry->shareable == shareable) 631 return entry->override; 632 } 633 634#ifdef CONFIG_X86 635 /* 636 * Always use the MADT override info, except for the i8042 PS/2 ctrl 637 * IRQs (1 and 12). For these the DSDT IRQ settings should sometimes 638 * be used otherwise PS/2 keyboards / mice will not work. 639 */ 640 if (gsi != 1 && gsi != 12) 641 return true; 642 643 /* If the override comes from an INT_SRC_OVR MADT entry, honor it. */ 644 if (acpi_int_src_ovr[gsi]) 645 return true; 646 647 /* 648 * IRQ override isn't needed on modern AMD Zen systems and 649 * this override breaks active low IRQs on AMD Ryzen 6000 and 650 * newer systems. Skip it. 651 */ 652 if (boot_cpu_has(X86_FEATURE_ZEN)) 653 return false; 654#endif 655 656 return true; 657} 658 659static void acpi_dev_get_irqresource(struct resource *res, u32 gsi, 660 u8 triggering, u8 polarity, u8 shareable, 661 u8 wake_capable, bool check_override) 662{ 663 int irq, p, t; 664 665 if (!valid_IRQ(gsi)) { 666 irqresource_disabled(res, gsi); 667 return; 668 } 669 670 /* 671 * In IO-APIC mode, use overridden attribute. Two reasons: 672 * 1. BIOS bug in DSDT 673 * 2. BIOS uses IO-APIC mode Interrupt Source Override 674 * 675 * We do this only if we are dealing with IRQ() or IRQNoFlags() 676 * resource (the legacy ISA resources). With modern ACPI 5 devices 677 * using extended IRQ descriptors we take the IRQ configuration 678 * from _CRS directly. 679 */ 680 if (check_override && 681 acpi_dev_irq_override(gsi, triggering, polarity, shareable) && 682 !acpi_get_override_irq(gsi, &t, &p)) { 683 u8 trig = t ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE; 684 u8 pol = p ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH; 685 686 if (triggering != trig || polarity != pol) { 687 pr_warn("ACPI: IRQ %d override to %s%s, %s%s\n", gsi, 688 t ? "level" : "edge", 689 trig == triggering ? "" : "(!)", 690 p ? "low" : "high", 691 pol == polarity ? "" : "(!)"); 692 triggering = trig; 693 polarity = pol; 694 } 695 } 696 697 res->flags = acpi_dev_irq_flags(triggering, polarity, shareable, wake_capable); 698 irq = acpi_register_gsi(NULL, gsi, triggering, polarity); 699 if (irq >= 0) { 700 res->start = irq; 701 res->end = irq; 702 } else { 703 irqresource_disabled(res, gsi); 704 } 705} 706 707/** 708 * acpi_dev_resource_interrupt - Extract ACPI interrupt resource information. 709 * @ares: Input ACPI resource object. 710 * @index: Index into the array of GSIs represented by the resource. 711 * @res: Output generic resource object. 712 * 713 * Check if the given ACPI resource object represents an interrupt resource 714 * and @index does not exceed the resource's interrupt count (true is returned 715 * in that case regardless of the results of the other checks)). If that's the 716 * case, register the GSI corresponding to @index from the array of interrupts 717 * represented by the resource and populate the generic resource object pointed 718 * to by @res accordingly. If the registration of the GSI is not successful, 719 * IORESOURCE_DISABLED will be set it that object's flags. 720 * 721 * Return: 722 * 1) false with res->flags setting to zero: not the expected resource type 723 * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource 724 * 3) true: valid assigned resource 725 */ 726bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index, 727 struct resource *res) 728{ 729 struct acpi_resource_irq *irq; 730 struct acpi_resource_extended_irq *ext_irq; 731 732 switch (ares->type) { 733 case ACPI_RESOURCE_TYPE_IRQ: 734 /* 735 * Per spec, only one interrupt per descriptor is allowed in 736 * _CRS, but some firmware violates this, so parse them all. 737 */ 738 irq = &ares->data.irq; 739 if (index >= irq->interrupt_count) { 740 irqresource_disabled(res, 0); 741 return false; 742 } 743 acpi_dev_get_irqresource(res, irq->interrupts[index], 744 irq->triggering, irq->polarity, 745 irq->shareable, irq->wake_capable, 746 true); 747 break; 748 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: 749 ext_irq = &ares->data.extended_irq; 750 if (index >= ext_irq->interrupt_count) { 751 irqresource_disabled(res, 0); 752 return false; 753 } 754 if (is_gsi(ext_irq)) 755 acpi_dev_get_irqresource(res, ext_irq->interrupts[index], 756 ext_irq->triggering, ext_irq->polarity, 757 ext_irq->shareable, ext_irq->wake_capable, 758 false); 759 else 760 irqresource_disabled(res, 0); 761 break; 762 default: 763 res->flags = 0; 764 return false; 765 } 766 767 return true; 768} 769EXPORT_SYMBOL_GPL(acpi_dev_resource_interrupt); 770 771/** 772 * acpi_dev_free_resource_list - Free resource from %acpi_dev_get_resources(). 773 * @list: The head of the resource list to free. 774 */ 775void acpi_dev_free_resource_list(struct list_head *list) 776{ 777 resource_list_free(list); 778} 779EXPORT_SYMBOL_GPL(acpi_dev_free_resource_list); 780 781struct res_proc_context { 782 struct list_head *list; 783 int (*preproc)(struct acpi_resource *, void *); 784 void *preproc_data; 785 int count; 786 int error; 787}; 788 789static acpi_status acpi_dev_new_resource_entry(struct resource_win *win, 790 struct res_proc_context *c) 791{ 792 struct resource_entry *rentry; 793 794 rentry = resource_list_create_entry(NULL, 0); 795 if (!rentry) { 796 c->error = -ENOMEM; 797 return AE_NO_MEMORY; 798 } 799 *rentry->res = win->res; 800 rentry->offset = win->offset; 801 resource_list_add_tail(rentry, c->list); 802 c->count++; 803 return AE_OK; 804} 805 806static acpi_status acpi_dev_process_resource(struct acpi_resource *ares, 807 void *context) 808{ 809 struct res_proc_context *c = context; 810 struct resource_win win; 811 struct resource *res = &win.res; 812 int i; 813 814 if (c->preproc) { 815 int ret; 816 817 ret = c->preproc(ares, c->preproc_data); 818 if (ret < 0) { 819 c->error = ret; 820 return AE_ABORT_METHOD; 821 } else if (ret > 0) { 822 return AE_OK; 823 } 824 } 825 826 memset(&win, 0, sizeof(win)); 827 828 if (acpi_dev_resource_memory(ares, res) 829 || acpi_dev_resource_io(ares, res) 830 || acpi_dev_resource_address_space(ares, &win) 831 || acpi_dev_resource_ext_address_space(ares, &win)) 832 return acpi_dev_new_resource_entry(&win, c); 833 834 for (i = 0; acpi_dev_resource_interrupt(ares, i, res); i++) { 835 acpi_status status; 836 837 status = acpi_dev_new_resource_entry(&win, c); 838 if (ACPI_FAILURE(status)) 839 return status; 840 } 841 842 return AE_OK; 843} 844 845static int __acpi_dev_get_resources(struct acpi_device *adev, 846 struct list_head *list, 847 int (*preproc)(struct acpi_resource *, void *), 848 void *preproc_data, char *method) 849{ 850 struct res_proc_context c; 851 acpi_status status; 852 853 if (!adev || !adev->handle || !list_empty(list)) 854 return -EINVAL; 855 856 if (!acpi_has_method(adev->handle, method)) 857 return 0; 858 859 c.list = list; 860 c.preproc = preproc; 861 c.preproc_data = preproc_data; 862 c.count = 0; 863 c.error = 0; 864 status = acpi_walk_resources(adev->handle, method, 865 acpi_dev_process_resource, &c); 866 if (ACPI_FAILURE(status)) { 867 acpi_dev_free_resource_list(list); 868 return c.error ? c.error : -EIO; 869 } 870 871 return c.count; 872} 873 874/** 875 * acpi_dev_get_resources - Get current resources of a device. 876 * @adev: ACPI device node to get the resources for. 877 * @list: Head of the resultant list of resources (must be empty). 878 * @preproc: The caller's preprocessing routine. 879 * @preproc_data: Pointer passed to the caller's preprocessing routine. 880 * 881 * Evaluate the _CRS method for the given device node and process its output by 882 * (1) executing the @preproc() routine provided by the caller, passing the 883 * resource pointer and @preproc_data to it as arguments, for each ACPI resource 884 * returned and (2) converting all of the returned ACPI resources into struct 885 * resource objects if possible. If the return value of @preproc() in step (1) 886 * is different from 0, step (2) is not applied to the given ACPI resource and 887 * if that value is negative, the whole processing is aborted and that value is 888 * returned as the final error code. 889 * 890 * The resultant struct resource objects are put on the list pointed to by 891 * @list, that must be empty initially, as members of struct resource_entry 892 * objects. Callers of this routine should use %acpi_dev_free_resource_list() to 893 * free that list. 894 * 895 * The number of resources in the output list is returned on success, an error 896 * code reflecting the error condition is returned otherwise. 897 */ 898int acpi_dev_get_resources(struct acpi_device *adev, struct list_head *list, 899 int (*preproc)(struct acpi_resource *, void *), 900 void *preproc_data) 901{ 902 return __acpi_dev_get_resources(adev, list, preproc, preproc_data, 903 METHOD_NAME__CRS); 904} 905EXPORT_SYMBOL_GPL(acpi_dev_get_resources); 906 907static int is_memory(struct acpi_resource *ares, void *not_used) 908{ 909 struct resource_win win; 910 struct resource *res = &win.res; 911 912 memset(&win, 0, sizeof(win)); 913 914 if (acpi_dev_filter_resource_type(ares, IORESOURCE_MEM)) 915 return 1; 916 917 return !(acpi_dev_resource_memory(ares, res) 918 || acpi_dev_resource_address_space(ares, &win) 919 || acpi_dev_resource_ext_address_space(ares, &win)); 920} 921 922/** 923 * acpi_dev_get_dma_resources - Get current DMA resources of a device. 924 * @adev: ACPI device node to get the resources for. 925 * @list: Head of the resultant list of resources (must be empty). 926 * 927 * Evaluate the _DMA method for the given device node and process its 928 * output. 929 * 930 * The resultant struct resource objects are put on the list pointed to 931 * by @list, that must be empty initially, as members of struct 932 * resource_entry objects. Callers of this routine should use 933 * %acpi_dev_free_resource_list() to free that list. 934 * 935 * The number of resources in the output list is returned on success, 936 * an error code reflecting the error condition is returned otherwise. 937 */ 938int acpi_dev_get_dma_resources(struct acpi_device *adev, struct list_head *list) 939{ 940 return __acpi_dev_get_resources(adev, list, is_memory, NULL, 941 METHOD_NAME__DMA); 942} 943EXPORT_SYMBOL_GPL(acpi_dev_get_dma_resources); 944 945/** 946 * acpi_dev_get_memory_resources - Get current memory resources of a device. 947 * @adev: ACPI device node to get the resources for. 948 * @list: Head of the resultant list of resources (must be empty). 949 * 950 * This is a helper function that locates all memory type resources of @adev 951 * with acpi_dev_get_resources(). 952 * 953 * The number of resources in the output list is returned on success, an error 954 * code reflecting the error condition is returned otherwise. 955 */ 956int acpi_dev_get_memory_resources(struct acpi_device *adev, struct list_head *list) 957{ 958 return acpi_dev_get_resources(adev, list, is_memory, NULL); 959} 960EXPORT_SYMBOL_GPL(acpi_dev_get_memory_resources); 961 962/** 963 * acpi_dev_filter_resource_type - Filter ACPI resource according to resource 964 * types 965 * @ares: Input ACPI resource object. 966 * @types: Valid resource types of IORESOURCE_XXX 967 * 968 * This is a helper function to support acpi_dev_get_resources(), which filters 969 * ACPI resource objects according to resource types. 970 */ 971int acpi_dev_filter_resource_type(struct acpi_resource *ares, 972 unsigned long types) 973{ 974 unsigned long type = 0; 975 976 switch (ares->type) { 977 case ACPI_RESOURCE_TYPE_MEMORY24: 978 case ACPI_RESOURCE_TYPE_MEMORY32: 979 case ACPI_RESOURCE_TYPE_FIXED_MEMORY32: 980 type = IORESOURCE_MEM; 981 break; 982 case ACPI_RESOURCE_TYPE_IO: 983 case ACPI_RESOURCE_TYPE_FIXED_IO: 984 type = IORESOURCE_IO; 985 break; 986 case ACPI_RESOURCE_TYPE_IRQ: 987 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: 988 type = IORESOURCE_IRQ; 989 break; 990 case ACPI_RESOURCE_TYPE_DMA: 991 case ACPI_RESOURCE_TYPE_FIXED_DMA: 992 type = IORESOURCE_DMA; 993 break; 994 case ACPI_RESOURCE_TYPE_GENERIC_REGISTER: 995 type = IORESOURCE_REG; 996 break; 997 case ACPI_RESOURCE_TYPE_ADDRESS16: 998 case ACPI_RESOURCE_TYPE_ADDRESS32: 999 case ACPI_RESOURCE_TYPE_ADDRESS64: 1000 case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64: 1001 if (ares->data.address.resource_type == ACPI_MEMORY_RANGE) 1002 type = IORESOURCE_MEM; 1003 else if (ares->data.address.resource_type == ACPI_IO_RANGE) 1004 type = IORESOURCE_IO; 1005 else if (ares->data.address.resource_type == 1006 ACPI_BUS_NUMBER_RANGE) 1007 type = IORESOURCE_BUS; 1008 break; 1009 default: 1010 break; 1011 } 1012 1013 return (type & types) ? 0 : 1; 1014} 1015EXPORT_SYMBOL_GPL(acpi_dev_filter_resource_type); 1016 1017static int acpi_dev_consumes_res(struct acpi_device *adev, struct resource *res) 1018{ 1019 struct list_head resource_list; 1020 struct resource_entry *rentry; 1021 int ret, found = 0; 1022 1023 INIT_LIST_HEAD(&resource_list); 1024 ret = acpi_dev_get_resources(adev, &resource_list, NULL, NULL); 1025 if (ret < 0) 1026 return 0; 1027 1028 list_for_each_entry(rentry, &resource_list, node) { 1029 if (resource_contains(rentry->res, res)) { 1030 found = 1; 1031 break; 1032 } 1033 1034 } 1035 1036 acpi_dev_free_resource_list(&resource_list); 1037 return found; 1038} 1039 1040static acpi_status acpi_res_consumer_cb(acpi_handle handle, u32 depth, 1041 void *context, void **ret) 1042{ 1043 struct resource *res = context; 1044 struct acpi_device **consumer = (struct acpi_device **) ret; 1045 struct acpi_device *adev = acpi_fetch_acpi_dev(handle); 1046 1047 if (!adev) 1048 return AE_OK; 1049 1050 if (acpi_dev_consumes_res(adev, res)) { 1051 *consumer = adev; 1052 return AE_CTRL_TERMINATE; 1053 } 1054 1055 return AE_OK; 1056} 1057 1058/** 1059 * acpi_resource_consumer - Find the ACPI device that consumes @res. 1060 * @res: Resource to search for. 1061 * 1062 * Search the current resource settings (_CRS) of every ACPI device node 1063 * for @res. If we find an ACPI device whose _CRS includes @res, return 1064 * it. Otherwise, return NULL. 1065 */ 1066struct acpi_device *acpi_resource_consumer(struct resource *res) 1067{ 1068 struct acpi_device *consumer = NULL; 1069 1070 acpi_get_devices(NULL, acpi_res_consumer_cb, res, (void **) &consumer); 1071 return consumer; 1072} 1073