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 */ 340unsigned long acpi_dev_irq_flags(u8 triggering, u8 polarity, u8 shareable) 341{ 342 unsigned long flags; 343 344 if (triggering == ACPI_LEVEL_SENSITIVE) 345 flags = polarity == ACPI_ACTIVE_LOW ? 346 IORESOURCE_IRQ_LOWLEVEL : IORESOURCE_IRQ_HIGHLEVEL; 347 else 348 flags = polarity == ACPI_ACTIVE_LOW ? 349 IORESOURCE_IRQ_LOWEDGE : IORESOURCE_IRQ_HIGHEDGE; 350 351 if (shareable == ACPI_SHARED) 352 flags |= IORESOURCE_IRQ_SHAREABLE; 353 354 return flags | IORESOURCE_IRQ; 355} 356EXPORT_SYMBOL_GPL(acpi_dev_irq_flags); 357 358/** 359 * acpi_dev_get_irq_type - Determine irq type. 360 * @triggering: Triggering type as provided by ACPI. 361 * @polarity: Interrupt polarity as provided by ACPI. 362 */ 363unsigned int acpi_dev_get_irq_type(int triggering, int polarity) 364{ 365 switch (polarity) { 366 case ACPI_ACTIVE_LOW: 367 return triggering == ACPI_EDGE_SENSITIVE ? 368 IRQ_TYPE_EDGE_FALLING : 369 IRQ_TYPE_LEVEL_LOW; 370 case ACPI_ACTIVE_HIGH: 371 return triggering == ACPI_EDGE_SENSITIVE ? 372 IRQ_TYPE_EDGE_RISING : 373 IRQ_TYPE_LEVEL_HIGH; 374 case ACPI_ACTIVE_BOTH: 375 if (triggering == ACPI_EDGE_SENSITIVE) 376 return IRQ_TYPE_EDGE_BOTH; 377 fallthrough; 378 default: 379 return IRQ_TYPE_NONE; 380 } 381} 382EXPORT_SYMBOL_GPL(acpi_dev_get_irq_type); 383 384static const struct dmi_system_id medion_laptop[] = { 385 { 386 .ident = "MEDION P15651", 387 .matches = { 388 DMI_MATCH(DMI_SYS_VENDOR, "MEDION"), 389 DMI_MATCH(DMI_BOARD_NAME, "M15T"), 390 }, 391 }, 392 { } 393}; 394 395static const struct dmi_system_id asus_laptop[] = { 396 { 397 .ident = "Asus Vivobook K3402ZA", 398 .matches = { 399 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 400 DMI_MATCH(DMI_BOARD_NAME, "K3402ZA"), 401 }, 402 }, 403 { 404 .ident = "Asus Vivobook K3502ZA", 405 .matches = { 406 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 407 DMI_MATCH(DMI_BOARD_NAME, "K3502ZA"), 408 }, 409 }, 410 { 411 .ident = "Asus Vivobook S5402ZA", 412 .matches = { 413 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 414 DMI_MATCH(DMI_BOARD_NAME, "S5402ZA"), 415 }, 416 }, 417 { 418 .ident = "Asus Vivobook S5602ZA", 419 .matches = { 420 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 421 DMI_MATCH(DMI_BOARD_NAME, "S5602ZA"), 422 }, 423 }, 424 { 425 .ident = "Asus ExpertBook B1402CBA", 426 .matches = { 427 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 428 DMI_MATCH(DMI_BOARD_NAME, "B1402CBA"), 429 }, 430 }, 431 { 432 .ident = "Asus ExpertBook B1502CBA", 433 .matches = { 434 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 435 DMI_MATCH(DMI_BOARD_NAME, "B1502CBA"), 436 }, 437 }, 438 { 439 .ident = "Asus ExpertBook B2402CBA", 440 .matches = { 441 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 442 DMI_MATCH(DMI_BOARD_NAME, "B2402CBA"), 443 }, 444 }, 445 { 446 /* TongFang GMxXGxx/TUXEDO Polaris 15 Gen5 AMD */ 447 .matches = { 448 DMI_MATCH(DMI_BOARD_NAME, "GMxXGxx"), 449 }, 450 }, 451 { 452 /* Asus ExpertBook B1402CVA */ 453 .matches = { 454 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 455 DMI_MATCH(DMI_BOARD_NAME, "B1402CVA"), 456 }, 457 }, 458 { 459 /* TongFang GMxXGxx sold as Eluktronics Inc. RP-15 */ 460 .matches = { 461 DMI_MATCH(DMI_SYS_VENDOR, "Eluktronics Inc."), 462 DMI_MATCH(DMI_BOARD_NAME, "RP-15"), 463 }, 464 }, 465 { 466 /* TongFang GM6XGxX/TUXEDO Stellaris 16 Gen5 AMD */ 467 .matches = { 468 DMI_MATCH(DMI_BOARD_NAME, "GM6XGxX"), 469 }, 470 }, 471 { 472 .ident = "Asus ExpertBook B2502", 473 .matches = { 474 DMI_MATCH(DMI_SYS_VENDOR, "ASUSTeK COMPUTER INC."), 475 DMI_MATCH(DMI_BOARD_NAME, "B2502CBA"), 476 }, 477 }, 478 { } 479}; 480 481struct irq_override_cmp { 482 const struct dmi_system_id *system; 483 unsigned char irq; 484 unsigned char triggering; 485 unsigned char polarity; 486 unsigned char shareable; 487}; 488 489static const struct irq_override_cmp skip_override_table[] = { 490 { medion_laptop, 1, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW, 0 }, 491 { asus_laptop, 1, ACPI_LEVEL_SENSITIVE, ACPI_ACTIVE_LOW, 0 }, 492}; 493 494static bool acpi_dev_irq_override(u32 gsi, u8 triggering, u8 polarity, 495 u8 shareable) 496{ 497 int i; 498 499 for (i = 0; i < ARRAY_SIZE(skip_override_table); i++) { 500 const struct irq_override_cmp *entry = &skip_override_table[i]; 501 502 if (dmi_check_system(entry->system) && 503 entry->irq == gsi && 504 entry->triggering == triggering && 505 entry->polarity == polarity && 506 entry->shareable == shareable) 507 return false; 508 } 509 510 return true; 511} 512 513static void acpi_dev_get_irqresource(struct resource *res, u32 gsi, 514 u8 triggering, u8 polarity, u8 shareable, 515 bool check_override) 516{ 517 int irq, p, t; 518 519 if (!valid_IRQ(gsi)) { 520 irqresource_disabled(res, gsi); 521 return; 522 } 523 524 /* 525 * In IO-APIC mode, use overridden attribute. Two reasons: 526 * 1. BIOS bug in DSDT 527 * 2. BIOS uses IO-APIC mode Interrupt Source Override 528 * 529 * We do this only if we are dealing with IRQ() or IRQNoFlags() 530 * resource (the legacy ISA resources). With modern ACPI 5 devices 531 * using extended IRQ descriptors we take the IRQ configuration 532 * from _CRS directly. 533 */ 534 if (check_override && 535 acpi_dev_irq_override(gsi, triggering, polarity, shareable) && 536 !acpi_get_override_irq(gsi, &t, &p)) { 537 u8 trig = t ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE; 538 u8 pol = p ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH; 539 540 if (triggering != trig || polarity != pol) { 541 pr_warn("ACPI: IRQ %d override to %s, %s\n", gsi, 542 t ? "level" : "edge", p ? "low" : "high"); 543 triggering = trig; 544 polarity = pol; 545 } 546 } 547 548 res->flags = acpi_dev_irq_flags(triggering, polarity, shareable); 549 irq = acpi_register_gsi(NULL, gsi, triggering, polarity); 550 if (irq >= 0) { 551 res->start = irq; 552 res->end = irq; 553 } else { 554 irqresource_disabled(res, gsi); 555 } 556} 557 558/** 559 * acpi_dev_resource_interrupt - Extract ACPI interrupt resource information. 560 * @ares: Input ACPI resource object. 561 * @index: Index into the array of GSIs represented by the resource. 562 * @res: Output generic resource object. 563 * 564 * Check if the given ACPI resource object represents an interrupt resource 565 * and @index does not exceed the resource's interrupt count (true is returned 566 * in that case regardless of the results of the other checks)). If that's the 567 * case, register the GSI corresponding to @index from the array of interrupts 568 * represented by the resource and populate the generic resource object pointed 569 * to by @res accordingly. If the registration of the GSI is not successful, 570 * IORESOURCE_DISABLED will be set it that object's flags. 571 * 572 * Return: 573 * 1) false with res->flags setting to zero: not the expected resource type 574 * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource 575 * 3) true: valid assigned resource 576 */ 577bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index, 578 struct resource *res) 579{ 580 struct acpi_resource_irq *irq; 581 struct acpi_resource_extended_irq *ext_irq; 582 583 switch (ares->type) { 584 case ACPI_RESOURCE_TYPE_IRQ: 585 /* 586 * Per spec, only one interrupt per descriptor is allowed in 587 * _CRS, but some firmware violates this, so parse them all. 588 */ 589 irq = &ares->data.irq; 590 if (index >= irq->interrupt_count) { 591 irqresource_disabled(res, 0); 592 return false; 593 } 594 acpi_dev_get_irqresource(res, irq->interrupts[index], 595 irq->triggering, irq->polarity, 596 irq->shareable, true); 597 break; 598 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: 599 ext_irq = &ares->data.extended_irq; 600 if (index >= ext_irq->interrupt_count) { 601 irqresource_disabled(res, 0); 602 return false; 603 } 604 if (is_gsi(ext_irq)) 605 acpi_dev_get_irqresource(res, ext_irq->interrupts[index], 606 ext_irq->triggering, ext_irq->polarity, 607 ext_irq->shareable, false); 608 else 609 irqresource_disabled(res, 0); 610 break; 611 default: 612 res->flags = 0; 613 return false; 614 } 615 616 return true; 617} 618EXPORT_SYMBOL_GPL(acpi_dev_resource_interrupt); 619 620/** 621 * acpi_dev_free_resource_list - Free resource from %acpi_dev_get_resources(). 622 * @list: The head of the resource list to free. 623 */ 624void acpi_dev_free_resource_list(struct list_head *list) 625{ 626 resource_list_free(list); 627} 628EXPORT_SYMBOL_GPL(acpi_dev_free_resource_list); 629 630struct res_proc_context { 631 struct list_head *list; 632 int (*preproc)(struct acpi_resource *, void *); 633 void *preproc_data; 634 int count; 635 int error; 636}; 637 638static acpi_status acpi_dev_new_resource_entry(struct resource_win *win, 639 struct res_proc_context *c) 640{ 641 struct resource_entry *rentry; 642 643 rentry = resource_list_create_entry(NULL, 0); 644 if (!rentry) { 645 c->error = -ENOMEM; 646 return AE_NO_MEMORY; 647 } 648 *rentry->res = win->res; 649 rentry->offset = win->offset; 650 resource_list_add_tail(rentry, c->list); 651 c->count++; 652 return AE_OK; 653} 654 655static acpi_status acpi_dev_process_resource(struct acpi_resource *ares, 656 void *context) 657{ 658 struct res_proc_context *c = context; 659 struct resource_win win; 660 struct resource *res = &win.res; 661 int i; 662 663 if (c->preproc) { 664 int ret; 665 666 ret = c->preproc(ares, c->preproc_data); 667 if (ret < 0) { 668 c->error = ret; 669 return AE_ABORT_METHOD; 670 } else if (ret > 0) { 671 return AE_OK; 672 } 673 } 674 675 memset(&win, 0, sizeof(win)); 676 677 if (acpi_dev_resource_memory(ares, res) 678 || acpi_dev_resource_io(ares, res) 679 || acpi_dev_resource_address_space(ares, &win) 680 || acpi_dev_resource_ext_address_space(ares, &win)) 681 return acpi_dev_new_resource_entry(&win, c); 682 683 for (i = 0; acpi_dev_resource_interrupt(ares, i, res); i++) { 684 acpi_status status; 685 686 status = acpi_dev_new_resource_entry(&win, c); 687 if (ACPI_FAILURE(status)) 688 return status; 689 } 690 691 return AE_OK; 692} 693 694static int __acpi_dev_get_resources(struct acpi_device *adev, 695 struct list_head *list, 696 int (*preproc)(struct acpi_resource *, void *), 697 void *preproc_data, char *method) 698{ 699 struct res_proc_context c; 700 acpi_status status; 701 702 if (!adev || !adev->handle || !list_empty(list)) 703 return -EINVAL; 704 705 if (!acpi_has_method(adev->handle, method)) 706 return 0; 707 708 c.list = list; 709 c.preproc = preproc; 710 c.preproc_data = preproc_data; 711 c.count = 0; 712 c.error = 0; 713 status = acpi_walk_resources(adev->handle, method, 714 acpi_dev_process_resource, &c); 715 if (ACPI_FAILURE(status)) { 716 acpi_dev_free_resource_list(list); 717 return c.error ? c.error : -EIO; 718 } 719 720 return c.count; 721} 722 723/** 724 * acpi_dev_get_resources - Get current resources of a device. 725 * @adev: ACPI device node to get the resources for. 726 * @list: Head of the resultant list of resources (must be empty). 727 * @preproc: The caller's preprocessing routine. 728 * @preproc_data: Pointer passed to the caller's preprocessing routine. 729 * 730 * Evaluate the _CRS method for the given device node and process its output by 731 * (1) executing the @preproc() rountine provided by the caller, passing the 732 * resource pointer and @preproc_data to it as arguments, for each ACPI resource 733 * returned and (2) converting all of the returned ACPI resources into struct 734 * resource objects if possible. If the return value of @preproc() in step (1) 735 * is different from 0, step (2) is not applied to the given ACPI resource and 736 * if that value is negative, the whole processing is aborted and that value is 737 * returned as the final error code. 738 * 739 * The resultant struct resource objects are put on the list pointed to by 740 * @list, that must be empty initially, as members of struct resource_entry 741 * objects. Callers of this routine should use %acpi_dev_free_resource_list() to 742 * free that list. 743 * 744 * The number of resources in the output list is returned on success, an error 745 * code reflecting the error condition is returned otherwise. 746 */ 747int acpi_dev_get_resources(struct acpi_device *adev, struct list_head *list, 748 int (*preproc)(struct acpi_resource *, void *), 749 void *preproc_data) 750{ 751 return __acpi_dev_get_resources(adev, list, preproc, preproc_data, 752 METHOD_NAME__CRS); 753} 754EXPORT_SYMBOL_GPL(acpi_dev_get_resources); 755 756static int is_memory(struct acpi_resource *ares, void *not_used) 757{ 758 struct resource_win win; 759 struct resource *res = &win.res; 760 761 memset(&win, 0, sizeof(win)); 762 763 return !(acpi_dev_resource_memory(ares, res) 764 || acpi_dev_resource_address_space(ares, &win) 765 || acpi_dev_resource_ext_address_space(ares, &win)); 766} 767 768/** 769 * acpi_dev_get_dma_resources - Get current DMA resources of a device. 770 * @adev: ACPI device node to get the resources for. 771 * @list: Head of the resultant list of resources (must be empty). 772 * 773 * Evaluate the _DMA method for the given device node and process its 774 * output. 775 * 776 * The resultant struct resource objects are put on the list pointed to 777 * by @list, that must be empty initially, as members of struct 778 * resource_entry objects. Callers of this routine should use 779 * %acpi_dev_free_resource_list() to free that list. 780 * 781 * The number of resources in the output list is returned on success, 782 * an error code reflecting the error condition is returned otherwise. 783 */ 784int acpi_dev_get_dma_resources(struct acpi_device *adev, struct list_head *list) 785{ 786 return __acpi_dev_get_resources(adev, list, is_memory, NULL, 787 METHOD_NAME__DMA); 788} 789EXPORT_SYMBOL_GPL(acpi_dev_get_dma_resources); 790 791/** 792 * acpi_dev_filter_resource_type - Filter ACPI resource according to resource 793 * types 794 * @ares: Input ACPI resource object. 795 * @types: Valid resource types of IORESOURCE_XXX 796 * 797 * This is a helper function to support acpi_dev_get_resources(), which filters 798 * ACPI resource objects according to resource types. 799 */ 800int acpi_dev_filter_resource_type(struct acpi_resource *ares, 801 unsigned long types) 802{ 803 unsigned long type = 0; 804 805 switch (ares->type) { 806 case ACPI_RESOURCE_TYPE_MEMORY24: 807 case ACPI_RESOURCE_TYPE_MEMORY32: 808 case ACPI_RESOURCE_TYPE_FIXED_MEMORY32: 809 type = IORESOURCE_MEM; 810 break; 811 case ACPI_RESOURCE_TYPE_IO: 812 case ACPI_RESOURCE_TYPE_FIXED_IO: 813 type = IORESOURCE_IO; 814 break; 815 case ACPI_RESOURCE_TYPE_IRQ: 816 case ACPI_RESOURCE_TYPE_EXTENDED_IRQ: 817 type = IORESOURCE_IRQ; 818 break; 819 case ACPI_RESOURCE_TYPE_DMA: 820 case ACPI_RESOURCE_TYPE_FIXED_DMA: 821 type = IORESOURCE_DMA; 822 break; 823 case ACPI_RESOURCE_TYPE_GENERIC_REGISTER: 824 type = IORESOURCE_REG; 825 break; 826 case ACPI_RESOURCE_TYPE_ADDRESS16: 827 case ACPI_RESOURCE_TYPE_ADDRESS32: 828 case ACPI_RESOURCE_TYPE_ADDRESS64: 829 case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64: 830 if (ares->data.address.resource_type == ACPI_MEMORY_RANGE) 831 type = IORESOURCE_MEM; 832 else if (ares->data.address.resource_type == ACPI_IO_RANGE) 833 type = IORESOURCE_IO; 834 else if (ares->data.address.resource_type == 835 ACPI_BUS_NUMBER_RANGE) 836 type = IORESOURCE_BUS; 837 break; 838 default: 839 break; 840 } 841 842 return (type & types) ? 0 : 1; 843} 844EXPORT_SYMBOL_GPL(acpi_dev_filter_resource_type); 845 846static int acpi_dev_consumes_res(struct acpi_device *adev, struct resource *res) 847{ 848 struct list_head resource_list; 849 struct resource_entry *rentry; 850 int ret, found = 0; 851 852 INIT_LIST_HEAD(&resource_list); 853 ret = acpi_dev_get_resources(adev, &resource_list, NULL, NULL); 854 if (ret < 0) 855 return 0; 856 857 list_for_each_entry(rentry, &resource_list, node) { 858 if (resource_contains(rentry->res, res)) { 859 found = 1; 860 break; 861 } 862 863 } 864 865 acpi_dev_free_resource_list(&resource_list); 866 return found; 867} 868 869static acpi_status acpi_res_consumer_cb(acpi_handle handle, u32 depth, 870 void *context, void **ret) 871{ 872 struct resource *res = context; 873 struct acpi_device **consumer = (struct acpi_device **) ret; 874 struct acpi_device *adev; 875 876 if (acpi_bus_get_device(handle, &adev)) 877 return AE_OK; 878 879 if (acpi_dev_consumes_res(adev, res)) { 880 *consumer = adev; 881 return AE_CTRL_TERMINATE; 882 } 883 884 return AE_OK; 885} 886 887/** 888 * acpi_resource_consumer - Find the ACPI device that consumes @res. 889 * @res: Resource to search for. 890 * 891 * Search the current resource settings (_CRS) of every ACPI device node 892 * for @res. If we find an ACPI device whose _CRS includes @res, return 893 * it. Otherwise, return NULL. 894 */ 895struct acpi_device *acpi_resource_consumer(struct resource *res) 896{ 897 struct acpi_device *consumer = NULL; 898 899 acpi_get_devices(NULL, acpi_res_consumer_cb, res, (void **) &consumer); 900 return consumer; 901} 902