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)) 23 static 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 */ 35 static inline bool 36 acpi_iospace_resource_valid(struct resource *res) { return true; } 37 #endif 38 39 #if IS_ENABLED(CONFIG_ACPI_GENERIC_GSI) 40 static 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 46 static inline bool is_gsi(struct acpi_resource_extended_irq *ext_irq) 47 { 48 return true; 49 } 50 #endif 51 52 static 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 72 static 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 84 static 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 */ 106 bool 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 } 138 EXPORT_SYMBOL_GPL(acpi_dev_resource_memory); 139 140 static 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 } 156 157 static 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 */ 179 bool 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 } 204 EXPORT_SYMBOL_GPL(acpi_dev_resource_io); 205 206 static 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 */ 289 bool 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 } 301 EXPORT_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 */ 318 bool 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 } 332 EXPORT_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 */ 341 unsigned 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 } 360 EXPORT_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 */ 367 unsigned 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 } 386 EXPORT_SYMBOL_GPL(acpi_dev_get_irq_type); 387 388 /* 389 * DMI matches for boards where the DSDT specifies the kbd IRQ as 390 * level active-low and using the override changes this to rising edge, 391 * stopping the keyboard from working. 392 */ 393 static const struct dmi_system_id irq1_level_low_skip_override[] = { 394 { 395 /* MEDION P15651 */ 396 .matches = { 397 DMI_MATCH(DMI_SYS_VENDOR, "MEDION"), 398 DMI_MATCH(DMI_BOARD_NAME, "M15T"), 399 }, 400 }, 401 { 402 /* MEDION S17405 */ 403 .matches = { 404 DMI_MATCH(DMI_SYS_VENDOR, "MEDION"), 405 DMI_MATCH(DMI_BOARD_NAME, "M17T"), 406 }, 407 }, 408 { 409 /* MEDION S17413 */ 410 .matches = { 411 DMI_MATCH(DMI_SYS_VENDOR, "MEDION"), 412 DMI_MATCH(DMI_BOARD_NAME, "M1xA"), 413 }, 414 }, 415 { 416 /* Asus Vivobook K3402ZA */ 417 .matches = { 418 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 419 DMI_MATCH(DMI_BOARD_NAME, "K3402ZA"), 420 }, 421 }, 422 { 423 /* Asus Vivobook K3502ZA */ 424 .matches = { 425 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 426 DMI_MATCH(DMI_BOARD_NAME, "K3502ZA"), 427 }, 428 }, 429 { 430 /* Asus Vivobook S5402ZA */ 431 .matches = { 432 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 433 DMI_MATCH(DMI_BOARD_NAME, "S5402ZA"), 434 }, 435 }, 436 { 437 /* Asus Vivobook S5602ZA */ 438 .matches = { 439 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 440 DMI_MATCH(DMI_BOARD_NAME, "S5602ZA"), 441 }, 442 }, 443 { 444 /* Asus ExpertBook B1402CBA */ 445 .matches = { 446 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 447 DMI_MATCH(DMI_BOARD_NAME, "B1402CBA"), 448 }, 449 }, 450 { 451 /* Asus ExpertBook B1402CVA */ 452 .matches = { 453 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 454 DMI_MATCH(DMI_BOARD_NAME, "B1402CVA"), 455 }, 456 }, 457 { 458 /* Asus ExpertBook B1502CBA */ 459 .matches = { 460 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 461 DMI_MATCH(DMI_BOARD_NAME, "B1502CBA"), 462 }, 463 }, 464 { 465 /* Asus ExpertBook B2402CBA */ 466 .matches = { 467 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 468 DMI_MATCH(DMI_BOARD_NAME, "B2402CBA"), 469 }, 470 }, 471 { 472 /* Asus ExpertBook B2402FBA */ 473 .matches = { 474 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 475 DMI_MATCH(DMI_BOARD_NAME, "B2402FBA"), 476 }, 477 }, 478 { 479 /* Asus ExpertBook B2502 */ 480 .matches = { 481 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 482 DMI_MATCH(DMI_BOARD_NAME, "B2502CBA"), 483 }, 484 }, 485 { 486 /* LG Electronics 17U70P */ 487 .matches = { 488 DMI_MATCH(DMI_SYS_VENDOR, "LG Electronics"), 489 DMI_MATCH(DMI_BOARD_NAME, "17U70P"), 490 }, 491 }, 492 { } 493 }; 494 495 /* 496 * DMI matches for AMD Zen boards where the DSDT specifies the kbd IRQ 497 * as falling edge and this must be overridden to rising edge, 498 * to have a working keyboard. 499 */ 500 static const struct dmi_system_id irq1_edge_low_force_override[] = { 501 { 502 /* TongFang GMxRGxx/XMG CORE 15 (M22)/TUXEDO Stellaris 15 Gen4 AMD */ 503 .matches = { 504 DMI_MATCH(DMI_BOARD_NAME, "GMxRGxx"), 505 }, 506 }, 507 { 508 /* TongFang GMxXGxx/TUXEDO Polaris 15 Gen5 AMD */ 509 .matches = { 510 DMI_MATCH(DMI_BOARD_NAME, "GMxXGxx"), 511 }, 512 }, 513 { 514 /* TongFang GM6XGxX/TUXEDO Stellaris 16 Gen5 AMD */ 515 .matches = { 516 DMI_MATCH(DMI_BOARD_NAME, "GM6XGxX"), 517 }, 518 }, 519 { 520 /* MAINGEAR Vector Pro 2 15 */ 521 .matches = { 522 DMI_MATCH(DMI_SYS_VENDOR, "Micro Electronics Inc"), 523 DMI_MATCH(DMI_PRODUCT_NAME, "MG-VCP2-15A3070T"), 524 } 525 }, 526 { 527 /* MAINGEAR Vector Pro 2 17 */ 528 .matches = { 529 DMI_MATCH(DMI_SYS_VENDOR, "Micro Electronics Inc"), 530 DMI_MATCH(DMI_PRODUCT_NAME, "MG-VCP2-17A3070T"), 531 }, 532 }, 533 { 534 /* TongFang GM6BGEQ / PCSpecialist Elimina Pro 16 M, RTX 3050 */ 535 .matches = { 536 DMI_MATCH(DMI_BOARD_NAME, "GM6BGEQ"), 537 }, 538 }, 539 { 540 /* TongFang GM6BG5Q, RTX 4050 */ 541 .matches = { 542 DMI_MATCH(DMI_BOARD_NAME, "GM6BG5Q"), 543 }, 544 }, 545 { 546 /* TongFang GM6BG0Q / PCSpecialist Elimina Pro 16 M, RTX 4060 */ 547 .matches = { 548 DMI_MATCH(DMI_BOARD_NAME, "GM6BG0Q"), 549 }, 550 }, 551 { } 552 }; 553 554 struct irq_override_cmp { 555 const struct dmi_system_id *system; 556 unsigned char irq; 557 unsigned char triggering; 558 unsigned char polarity; 559 unsigned char shareable; 560 bool override; 561 }; 562 563 static const struct irq_override_cmp override_table[] = { 564 { irq1_level_low_skip_override, 1, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW, 0, false }, 565 { irq1_edge_low_force_override, 1, ACPI_EDGE_SENSITIVE, ACPI_ACTIVE_LOW, 1, true }, 566 }; 567 568 static bool acpi_dev_irq_override(u32 gsi, u8 triggering, u8 polarity, 569 u8 shareable) 570 { 571 int i; 572 573 for (i = 0; i < ARRAY_SIZE(override_table); i++) { 574 const struct irq_override_cmp *entry = &override_table[i]; 575 576 if (dmi_check_system(entry->system) && 577 entry->irq == gsi && 578 entry->triggering == triggering && 579 entry->polarity == polarity && 580 entry->shareable == shareable) 581 return entry->override; 582 } 583 584 #ifdef CONFIG_X86 585 /* 586 * Always use the MADT override info, except for the i8042 PS/2 ctrl 587 * IRQs (1 and 12). For these the DSDT IRQ settings should sometimes 588 * be used otherwise PS/2 keyboards / mice will not work. 589 */ 590 if (gsi != 1 && gsi != 12) 591 return true; 592 593 /* If the override comes from an INT_SRC_OVR MADT entry, honor it. */ 594 if (acpi_int_src_ovr[gsi]) 595 return true; 596 597 /* 598 * IRQ override isn't needed on modern AMD Zen systems and 599 * this override breaks active low IRQs on AMD Ryzen 6000 and 600 * newer systems. Skip it. 601 */ 602 if (boot_cpu_has(X86_FEATURE_ZEN)) 603 return false; 604 #endif 605 606 return true; 607 } 608 609 static void acpi_dev_get_irqresource(struct resource *res, u32 gsi, 610 u8 triggering, u8 polarity, u8 shareable, 611 u8 wake_capable, bool check_override) 612 { 613 int irq, p, t; 614 615 if (!valid_IRQ(gsi)) { 616 irqresource_disabled(res, gsi); 617 return; 618 } 619 620 /* 621 * In IO-APIC mode, use overridden attribute. Two reasons: 622 * 1. BIOS bug in DSDT 623 * 2. BIOS uses IO-APIC mode Interrupt Source Override 624 * 625 * We do this only if we are dealing with IRQ() or IRQNoFlags() 626 * resource (the legacy ISA resources). With modern ACPI 5 devices 627 * using extended IRQ descriptors we take the IRQ configuration 628 * from _CRS directly. 629 */ 630 if (check_override && 631 acpi_dev_irq_override(gsi, triggering, polarity, shareable) && 632 !acpi_get_override_irq(gsi, &t, &p)) { 633 u8 trig = t ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE; 634 u8 pol = p ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH; 635 636 if (triggering != trig || polarity != pol) { 637 pr_warn("ACPI: IRQ %d override to %s%s, %s%s\n", gsi, 638 t ? "level" : "edge", 639 trig == triggering ? "" : "(!)", 640 p ? "low" : "high", 641 pol == polarity ? "" : "(!)"); 642 triggering = trig; 643 polarity = pol; 644 } 645 } 646 647 res->flags = acpi_dev_irq_flags(triggering, polarity, shareable, wake_capable); 648 irq = acpi_register_gsi(NULL, gsi, triggering, polarity); 649 if (irq >= 0) { 650 res->start = irq; 651 res->end = irq; 652 } else { 653 irqresource_disabled(res, gsi); 654 } 655 } 656 657 /** 658 * acpi_dev_resource_interrupt - Extract ACPI interrupt resource information. 659 * @ares: Input ACPI resource object. 660 * @index: Index into the array of GSIs represented by the resource. 661 * @res: Output generic resource object. 662 * 663 * Check if the given ACPI resource object represents an interrupt resource 664 * and @index does not exceed the resource's interrupt count (true is returned 665 * in that case regardless of the results of the other checks)). If that's the 666 * case, register the GSI corresponding to @index from the array of interrupts 667 * represented by the resource and populate the generic resource object pointed 668 * to by @res accordingly. If the registration of the GSI is not successful, 669 * IORESOURCE_DISABLED will be set it that object's flags. 670 * 671 * Return: 672 * 1) false with res->flags setting to zero: not the expected resource type 673 * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource 674 * 3) true: valid assigned resource 675 */ 676 bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index, 677 struct resource *res) 678 { 679 struct acpi_resource_irq *irq; 680 struct acpi_resource_extended_irq *ext_irq; 681 682 switch (ares->type) { 683 case ACPI_RESOURCE_TYPE_IRQ: 684 /* 685 * Per spec, only one interrupt per descriptor is allowed in 686 * _CRS, but some firmware violates this, so parse them all. 687 */ 688 irq = &ares->data.irq; 689 if (index >= irq->interrupt_count) { 690 irqresource_disabled(res, 0); 691 return false; 692 } 693 acpi_dev_get_irqresource(res, irq->interrupts[index], 694 irq->triggering, irq->polarity, 695 irq->shareable, irq->wake_capable, 696 true); 697 break; 698 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: 699 ext_irq = &ares->data.extended_irq; 700 if (index >= ext_irq->interrupt_count) { 701 irqresource_disabled(res, 0); 702 return false; 703 } 704 if (is_gsi(ext_irq)) 705 acpi_dev_get_irqresource(res, ext_irq->interrupts[index], 706 ext_irq->triggering, ext_irq->polarity, 707 ext_irq->shareable, ext_irq->wake_capable, 708 false); 709 else 710 irqresource_disabled(res, 0); 711 break; 712 default: 713 res->flags = 0; 714 return false; 715 } 716 717 return true; 718 } 719 EXPORT_SYMBOL_GPL(acpi_dev_resource_interrupt); 720 721 /** 722 * acpi_dev_free_resource_list - Free resource from %acpi_dev_get_resources(). 723 * @list: The head of the resource list to free. 724 */ 725 void acpi_dev_free_resource_list(struct list_head *list) 726 { 727 resource_list_free(list); 728 } 729 EXPORT_SYMBOL_GPL(acpi_dev_free_resource_list); 730 731 struct res_proc_context { 732 struct list_head *list; 733 int (*preproc)(struct acpi_resource *, void *); 734 void *preproc_data; 735 int count; 736 int error; 737 }; 738 739 static acpi_status acpi_dev_new_resource_entry(struct resource_win *win, 740 struct res_proc_context *c) 741 { 742 struct resource_entry *rentry; 743 744 rentry = resource_list_create_entry(NULL, 0); 745 if (!rentry) { 746 c->error = -ENOMEM; 747 return AE_NO_MEMORY; 748 } 749 *rentry->res = win->res; 750 rentry->offset = win->offset; 751 resource_list_add_tail(rentry, c->list); 752 c->count++; 753 return AE_OK; 754 } 755 756 static acpi_status acpi_dev_process_resource(struct acpi_resource *ares, 757 void *context) 758 { 759 struct res_proc_context *c = context; 760 struct resource_win win; 761 struct resource *res = &win.res; 762 int i; 763 764 if (c->preproc) { 765 int ret; 766 767 ret = c->preproc(ares, c->preproc_data); 768 if (ret < 0) { 769 c->error = ret; 770 return AE_ABORT_METHOD; 771 } else if (ret > 0) { 772 return AE_OK; 773 } 774 } 775 776 memset(&win, 0, sizeof(win)); 777 778 if (acpi_dev_resource_memory(ares, res) 779 || acpi_dev_resource_io(ares, res) 780 || acpi_dev_resource_address_space(ares, &win) 781 || acpi_dev_resource_ext_address_space(ares, &win)) 782 return acpi_dev_new_resource_entry(&win, c); 783 784 for (i = 0; acpi_dev_resource_interrupt(ares, i, res); i++) { 785 acpi_status status; 786 787 status = acpi_dev_new_resource_entry(&win, c); 788 if (ACPI_FAILURE(status)) 789 return status; 790 } 791 792 return AE_OK; 793 } 794 795 static int __acpi_dev_get_resources(struct acpi_device *adev, 796 struct list_head *list, 797 int (*preproc)(struct acpi_resource *, void *), 798 void *preproc_data, char *method) 799 { 800 struct res_proc_context c; 801 acpi_status status; 802 803 if (!adev || !adev->handle || !list_empty(list)) 804 return -EINVAL; 805 806 if (!acpi_has_method(adev->handle, method)) 807 return 0; 808 809 c.list = list; 810 c.preproc = preproc; 811 c.preproc_data = preproc_data; 812 c.count = 0; 813 c.error = 0; 814 status = acpi_walk_resources(adev->handle, method, 815 acpi_dev_process_resource, &c); 816 if (ACPI_FAILURE(status)) { 817 acpi_dev_free_resource_list(list); 818 return c.error ? c.error : -EIO; 819 } 820 821 return c.count; 822 } 823 824 /** 825 * acpi_dev_get_resources - Get current resources of a device. 826 * @adev: ACPI device node to get the resources for. 827 * @list: Head of the resultant list of resources (must be empty). 828 * @preproc: The caller's preprocessing routine. 829 * @preproc_data: Pointer passed to the caller's preprocessing routine. 830 * 831 * Evaluate the _CRS method for the given device node and process its output by 832 * (1) executing the @preproc() routine provided by the caller, passing the 833 * resource pointer and @preproc_data to it as arguments, for each ACPI resource 834 * returned and (2) converting all of the returned ACPI resources into struct 835 * resource objects if possible. If the return value of @preproc() in step (1) 836 * is different from 0, step (2) is not applied to the given ACPI resource and 837 * if that value is negative, the whole processing is aborted and that value is 838 * returned as the final error code. 839 * 840 * The resultant struct resource objects are put on the list pointed to by 841 * @list, that must be empty initially, as members of struct resource_entry 842 * objects. Callers of this routine should use %acpi_dev_free_resource_list() to 843 * free that list. 844 * 845 * The number of resources in the output list is returned on success, an error 846 * code reflecting the error condition is returned otherwise. 847 */ 848 int acpi_dev_get_resources(struct acpi_device *adev, struct list_head *list, 849 int (*preproc)(struct acpi_resource *, void *), 850 void *preproc_data) 851 { 852 return __acpi_dev_get_resources(adev, list, preproc, preproc_data, 853 METHOD_NAME__CRS); 854 } 855 EXPORT_SYMBOL_GPL(acpi_dev_get_resources); 856 857 static int is_memory(struct acpi_resource *ares, void *not_used) 858 { 859 struct resource_win win; 860 struct resource *res = &win.res; 861 862 memset(&win, 0, sizeof(win)); 863 864 if (acpi_dev_filter_resource_type(ares, IORESOURCE_MEM)) 865 return 1; 866 867 return !(acpi_dev_resource_memory(ares, res) 868 || acpi_dev_resource_address_space(ares, &win) 869 || acpi_dev_resource_ext_address_space(ares, &win)); 870 } 871 872 /** 873 * acpi_dev_get_dma_resources - Get current DMA resources of a device. 874 * @adev: ACPI device node to get the resources for. 875 * @list: Head of the resultant list of resources (must be empty). 876 * 877 * Evaluate the _DMA method for the given device node and process its 878 * output. 879 * 880 * The resultant struct resource objects are put on the list pointed to 881 * by @list, that must be empty initially, as members of struct 882 * resource_entry objects. Callers of this routine should use 883 * %acpi_dev_free_resource_list() to free that list. 884 * 885 * The number of resources in the output list is returned on success, 886 * an error code reflecting the error condition is returned otherwise. 887 */ 888 int acpi_dev_get_dma_resources(struct acpi_device *adev, struct list_head *list) 889 { 890 return __acpi_dev_get_resources(adev, list, is_memory, NULL, 891 METHOD_NAME__DMA); 892 } 893 EXPORT_SYMBOL_GPL(acpi_dev_get_dma_resources); 894 895 /** 896 * acpi_dev_get_memory_resources - Get current memory resources of a device. 897 * @adev: ACPI device node to get the resources for. 898 * @list: Head of the resultant list of resources (must be empty). 899 * 900 * This is a helper function that locates all memory type resources of @adev 901 * with acpi_dev_get_resources(). 902 * 903 * The number of resources in the output list is returned on success, an error 904 * code reflecting the error condition is returned otherwise. 905 */ 906 int acpi_dev_get_memory_resources(struct acpi_device *adev, struct list_head *list) 907 { 908 return acpi_dev_get_resources(adev, list, is_memory, NULL); 909 } 910 EXPORT_SYMBOL_GPL(acpi_dev_get_memory_resources); 911 912 /** 913 * acpi_dev_filter_resource_type - Filter ACPI resource according to resource 914 * types 915 * @ares: Input ACPI resource object. 916 * @types: Valid resource types of IORESOURCE_XXX 917 * 918 * This is a helper function to support acpi_dev_get_resources(), which filters 919 * ACPI resource objects according to resource types. 920 */ 921 int acpi_dev_filter_resource_type(struct acpi_resource *ares, 922 unsigned long types) 923 { 924 unsigned long type = 0; 925 926 switch (ares->type) { 927 case ACPI_RESOURCE_TYPE_MEMORY24: 928 case ACPI_RESOURCE_TYPE_MEMORY32: 929 case ACPI_RESOURCE_TYPE_FIXED_MEMORY32: 930 type = IORESOURCE_MEM; 931 break; 932 case ACPI_RESOURCE_TYPE_IO: 933 case ACPI_RESOURCE_TYPE_FIXED_IO: 934 type = IORESOURCE_IO; 935 break; 936 case ACPI_RESOURCE_TYPE_IRQ: 937 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: 938 type = IORESOURCE_IRQ; 939 break; 940 case ACPI_RESOURCE_TYPE_DMA: 941 case ACPI_RESOURCE_TYPE_FIXED_DMA: 942 type = IORESOURCE_DMA; 943 break; 944 case ACPI_RESOURCE_TYPE_GENERIC_REGISTER: 945 type = IORESOURCE_REG; 946 break; 947 case ACPI_RESOURCE_TYPE_ADDRESS16: 948 case ACPI_RESOURCE_TYPE_ADDRESS32: 949 case ACPI_RESOURCE_TYPE_ADDRESS64: 950 case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64: 951 if (ares->data.address.resource_type == ACPI_MEMORY_RANGE) 952 type = IORESOURCE_MEM; 953 else if (ares->data.address.resource_type == ACPI_IO_RANGE) 954 type = IORESOURCE_IO; 955 else if (ares->data.address.resource_type == 956 ACPI_BUS_NUMBER_RANGE) 957 type = IORESOURCE_BUS; 958 break; 959 default: 960 break; 961 } 962 963 return (type & types) ? 0 : 1; 964 } 965 EXPORT_SYMBOL_GPL(acpi_dev_filter_resource_type); 966 967 static int acpi_dev_consumes_res(struct acpi_device *adev, struct resource *res) 968 { 969 struct list_head resource_list; 970 struct resource_entry *rentry; 971 int ret, found = 0; 972 973 INIT_LIST_HEAD(&resource_list); 974 ret = acpi_dev_get_resources(adev, &resource_list, NULL, NULL); 975 if (ret < 0) 976 return 0; 977 978 list_for_each_entry(rentry, &resource_list, node) { 979 if (resource_contains(rentry->res, res)) { 980 found = 1; 981 break; 982 } 983 984 } 985 986 acpi_dev_free_resource_list(&resource_list); 987 return found; 988 } 989 990 static acpi_status acpi_res_consumer_cb(acpi_handle handle, u32 depth, 991 void *context, void **ret) 992 { 993 struct resource *res = context; 994 struct acpi_device **consumer = (struct acpi_device **) ret; 995 struct acpi_device *adev = acpi_fetch_acpi_dev(handle); 996 997 if (!adev) 998 return AE_OK; 999 1000 if (acpi_dev_consumes_res(adev, res)) { 1001 *consumer = adev; 1002 return AE_CTRL_TERMINATE; 1003 } 1004 1005 return AE_OK; 1006 } 1007 1008 /** 1009 * acpi_resource_consumer - Find the ACPI device that consumes @res. 1010 * @res: Resource to search for. 1011 * 1012 * Search the current resource settings (_CRS) of every ACPI device node 1013 * for @res. If we find an ACPI device whose _CRS includes @res, return 1014 * it. Otherwise, return NULL. 1015 */ 1016 struct acpi_device *acpi_resource_consumer(struct resource *res) 1017 { 1018 struct acpi_device *consumer = NULL; 1019 1020 acpi_get_devices(NULL, acpi_res_consumer_cb, res, (void **) &consumer); 1021 return consumer; 1022 } 1023