kernel/drivers/acpi/resource.c

   1 /*
   2  * drivers/acpi/resource.c - ACPI device resources interpretation.
   3  *
   4  * Copyright (C) 2012, Intel Corp.
   5  * Author: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
   6  *
   7  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   8  *
   9  *  This program is free software; you can redistribute it and/or modify
  10  *  it under the terms of the GNU General Public License version 2 as published
  11  *  by the Free Software Foundation.
  12  *
  13  *  This program is distributed in the hope that it will be useful, but
  14  *  WITHOUT ANY WARRANTY; without even the implied warranty of
  15  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  *  General Public License for more details.
  17  *
  18  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  19  */
  20
  21 #include <linux/acpi.h>
  22 #include <linux/device.h>
  23 #include <linux/export.h>
  24 #include <linux/ioport.h>
  25 #include <linux/slab.h>
  26
  27 #ifdef CONFIG_X86
  28 #define valid_IRQ(i) (((i) != 0) && ((i) != 2))
  29 #else
  30 #define valid_IRQ(i) (true)
  31 #endif
  32
  33 static bool acpi_dev_resource_len_valid(u64 start, u64 end, u64 len, bool io)
  34 {
  35         u64 reslen = end - start + 1;
  36
  37         /*
  38          * CHECKME: len might be required to check versus a minimum
  39          * length as well. 1 for io is fine, but for memory it does
  40          * not make any sense at all.
  41          * Note: some BIOSes report incorrect length for ACPI address space
  42          * descriptor, so remove check of 'reslen == len' to avoid regression.
  43          */
  44         if (len && reslen && start <= end)
  45                 return true;
  46
  47         pr_debug("ACPI: invalid or unassigned resource %s [%016llx - %016llx] length [%016llx]\n",
  48                 io ? "io" : "mem", start, end, len);
  49
  50         return false;
  51 }
  52
  53 static void acpi_dev_memresource_flags(struct resource *res, u64 len,
  54                                        u8 write_protect)
  55 {
  56         res->flags = IORESOURCE_MEM;
  57
  58         if (!acpi_dev_resource_len_valid(res->start, res->end, len, false))
  59                 res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET;
  60
  61         if (write_protect == ACPI_READ_WRITE_MEMORY)
  62                 res->flags |= IORESOURCE_MEM_WRITEABLE;
  63 }
  64
  65 static void acpi_dev_get_memresource(struct resource *res, u64 start, u64 len,
  66                                      u8 write_protect)
  67 {
  68         res->start = start;
  69         res->end = start + len - 1;
  70         acpi_dev_memresource_flags(res, len, write_protect);
  71 }
  72
  73 /**
  74  * acpi_dev_resource_memory - Extract ACPI memory resource information.
  75  * @ares: Input ACPI resource object.
  76  * @res: Output generic resource object.
  77  *
  78  * Check if the given ACPI resource object represents a memory resource and
  79  * if that's the case, use the information in it to populate the generic
  80  * resource object pointed to by @res.
  81  *
  82  * Return:
  83  * 1) false with res->flags setting to zero: not the expected resource type
  84  * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource
  85  * 3) true: valid assigned resource
  86  */
  87 bool acpi_dev_resource_memory(struct acpi_resource *ares, struct resource *res)
  88 {
  89         struct acpi_resource_memory24 *memory24;
  90         struct acpi_resource_memory32 *memory32;
  91         struct acpi_resource_fixed_memory32 *fixed_memory32;
  92
  93         switch (ares->type) {
  94         case ACPI_RESOURCE_TYPE_MEMORY24:
  95                 memory24 = &ares->data.memory24;
  96                 acpi_dev_get_memresource(res, memory24->minimum << 8,
  97                                          memory24->address_length << 8,
  98                                          memory24->write_protect);
  99                 break;
 100         case ACPI_RESOURCE_TYPE_MEMORY32:
 101                 memory32 = &ares->data.memory32;
 102                 acpi_dev_get_memresource(res, memory32->minimum,
 103                                          memory32->address_length,
 104                                          memory32->write_protect);
 105                 break;
 106         case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
 107                 fixed_memory32 = &ares->data.fixed_memory32;
 108                 acpi_dev_get_memresource(res, fixed_memory32->address,
 109                                          fixed_memory32->address_length,
 110                                          fixed_memory32->write_protect);
 111                 break;
 112         default:
 113                 res->flags = 0;
 114                 return false;
 115         }
 116
 117         return !(res->flags & IORESOURCE_DISABLED);
 118 }
 119 EXPORT_SYMBOL_GPL(acpi_dev_resource_memory);
 120
 121 static void acpi_dev_ioresource_flags(struct resource *res, u64 len,
 122                                       u8 io_decode, u8 translation_type)
 123 {
 124         res->flags = IORESOURCE_IO;
 125
 126         if (!acpi_dev_resource_len_valid(res->start, res->end, len, true))
 127                 res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET;
 128
 129         if (res->end >= 0x10003)
 130                 res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET;
 131
 132         if (io_decode == ACPI_DECODE_16)
 133                 res->flags |= IORESOURCE_IO_16BIT_ADDR;
 134         if (translation_type == ACPI_SPARSE_TRANSLATION)
 135                 res->flags |= IORESOURCE_IO_SPARSE;
 136 }
 137
 138 static void acpi_dev_get_ioresource(struct resource *res, u64 start, u64 len,
 139                                     u8 io_decode)
 140 {
 141         res->start = start;
 142         res->end = start + len - 1;
 143         acpi_dev_ioresource_flags(res, len, io_decode, 0);
 144 }
 145
 146 /**
 147  * acpi_dev_resource_io - Extract ACPI I/O resource information.
 148  * @ares: Input ACPI resource object.
 149  * @res: Output generic resource object.
 150  *
 151  * Check if the given ACPI resource object represents an I/O resource and
 152  * if that's the case, use the information in it to populate the generic
 153  * resource object pointed to by @res.
 154  *
 155  * Return:
 156  * 1) false with res->flags setting to zero: not the expected resource type
 157  * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource
 158  * 3) true: valid assigned resource
 159  */
 160 bool acpi_dev_resource_io(struct acpi_resource *ares, struct resource *res)
 161 {
 162         struct acpi_resource_io *io;
 163         struct acpi_resource_fixed_io *fixed_io;
 164
 165         switch (ares->type) {
 166         case ACPI_RESOURCE_TYPE_IO:
 167                 io = &ares->data.io;
 168                 acpi_dev_get_ioresource(res, io->minimum,
 169                                         io->address_length,
 170                                         io->io_decode);
 171                 break;
 172         case ACPI_RESOURCE_TYPE_FIXED_IO:
 173                 fixed_io = &ares->data.fixed_io;
 174                 acpi_dev_get_ioresource(res, fixed_io->address,
 175                                         fixed_io->address_length,
 176                                         ACPI_DECODE_10);
 177                 break;
 178         default:
 179                 res->flags = 0;
 180                 return false;
 181         }
 182
 183         return !(res->flags & IORESOURCE_DISABLED);
 184 }
 185 EXPORT_SYMBOL_GPL(acpi_dev_resource_io);
 186
 187 static bool acpi_decode_space(struct resource_win *win,
 188                               struct acpi_resource_address *addr,
 189                               struct acpi_address64_attribute *attr)
 190 {
 191         u8 iodec = attr->granularity == 0xfff ? ACPI_DECODE_10 : ACPI_DECODE_16;
 192         bool wp = addr->info.mem.write_protect;
 193         u64 len = attr->address_length;
 194         u64 start, end, offset = 0;
 195         struct resource *res = &win->res;
 196
 197         /*
 198          * Filter out invalid descriptor according to ACPI Spec 5.0, section
 199          * 6.4.3.5 Address Space Resource Descriptors.
 200          */
 201         if ((addr->min_address_fixed != addr->max_address_fixed && len) ||
 202             (addr->min_address_fixed && addr->max_address_fixed && !len))
 203                 pr_debug("ACPI: Invalid address space min_addr_fix %d, max_addr_fix %d, len %llx\n",
 204                          addr->min_address_fixed, addr->max_address_fixed, len);
 205
 206         /*
 207          * For bridges that translate addresses across the bridge,
 208          * translation_offset is the offset that must be added to the
 209          * address on the secondary side to obtain the address on the
 210          * primary side. Non-bridge devices must list 0 for all Address
 211          * Translation offset bits.
 212          */
 213         if (addr->producer_consumer == ACPI_PRODUCER)
 214                 offset = attr->translation_offset;
 215         else if (attr->translation_offset)
 216                 pr_debug("ACPI: translation_offset(%lld) is invalid for non-bridge device.\n",
 217                          attr->translation_offset);
 218         start = attr->minimum + offset;
 219         end = attr->maximum + offset;
 220
 221         win->offset = offset;
 222         res->start = start;
 223         res->end = end;
 224         if (sizeof(resource_size_t) < sizeof(u64) &&
 225             (offset != win->offset || start != res->start || end != res->end)) {
 226                 pr_warn("acpi resource window ([%#llx-%#llx] ignored, not CPU addressable)\n",
 227                         attr->minimum, attr->maximum);
 228                 return false;
 229         }
 230
 231         switch (addr->resource_type) {
 232         case ACPI_MEMORY_RANGE:
 233                 acpi_dev_memresource_flags(res, len, wp);
 234                 break;
 235         case ACPI_IO_RANGE:
 236                 acpi_dev_ioresource_flags(res, len, iodec,
 237                                           addr->info.io.translation_type);
 238                 break;
 239         case ACPI_BUS_NUMBER_RANGE:
 240                 res->flags = IORESOURCE_BUS;
 241                 break;
 242         default:
 243                 return false;
 244         }
 245
 246         if (addr->producer_consumer == ACPI_PRODUCER)
 247                 res->flags |= IORESOURCE_WINDOW;
 248
 249         if (addr->info.mem.caching == ACPI_PREFETCHABLE_MEMORY)
 250                 res->flags |= IORESOURCE_PREFETCH;
 251
 252         return !(res->flags & IORESOURCE_DISABLED);
 253 }
 254
 255 /**
 256  * acpi_dev_resource_address_space - Extract ACPI address space information.
 257  * @ares: Input ACPI resource object.
 258  * @win: Output generic resource object.
 259  *
 260  * Check if the given ACPI resource object represents an address space resource
 261  * and if that's the case, use the information in it to populate the generic
 262  * resource object pointed to by @win.
 263  *
 264  * Return:
 265  * 1) false with win->res.flags setting to zero: not the expected resource type
 266  * 2) false with IORESOURCE_DISABLED in win->res.flags: valid unassigned
 267  *    resource
 268  * 3) true: valid assigned resource
 269  */
 270 bool acpi_dev_resource_address_space(struct acpi_resource *ares,
 271                                      struct resource_win *win)
 272 {
 273         struct acpi_resource_address64 addr;
 274
 275         win->res.flags = 0;
 276         if (ACPI_FAILURE(acpi_resource_to_address64(ares, &addr)))
 277                 return false;
 278
 279         return acpi_decode_space(win, (struct acpi_resource_address *)&addr,
 280                                  &addr.address);
 281 }
 282 EXPORT_SYMBOL_GPL(acpi_dev_resource_address_space);
 283
 284 /**
 285  * acpi_dev_resource_ext_address_space - Extract ACPI address space information.
 286  * @ares: Input ACPI resource object.
 287  * @win: Output generic resource object.
 288  *
 289  * Check if the given ACPI resource object represents an extended address space
 290  * resource and if that's the case, use the information in it to populate the
 291  * generic resource object pointed to by @win.
 292  *
 293  * Return:
 294  * 1) false with win->res.flags setting to zero: not the expected resource type
 295  * 2) false with IORESOURCE_DISABLED in win->res.flags: valid unassigned
 296  *    resource
 297  * 3) true: valid assigned resource
 298  */
 299 bool acpi_dev_resource_ext_address_space(struct acpi_resource *ares,
 300                                          struct resource_win *win)
 301 {
 302         struct acpi_resource_extended_address64 *ext_addr;
 303
 304         win->res.flags = 0;
 305         if (ares->type != ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64)
 306                 return false;
 307
 308         ext_addr = &ares->data.ext_address64;
 309
 310         return acpi_decode_space(win, (struct acpi_resource_address *)ext_addr,
 311                                  &ext_addr->address);
 312 }
 313 EXPORT_SYMBOL_GPL(acpi_dev_resource_ext_address_space);
 314
 315 /**
 316  * acpi_dev_irq_flags - Determine IRQ resource flags.
 317  * @triggering: Triggering type as provided by ACPI.
 318  * @polarity: Interrupt polarity as provided by ACPI.
 319  * @shareable: Whether or not the interrupt is shareable.
 320  */
 321 unsigned long acpi_dev_irq_flags(u8 triggering, u8 polarity, u8 shareable)
 322 {
 323         unsigned long flags;
 324
 325         if (triggering == ACPI_LEVEL_SENSITIVE)
 326                 flags = polarity == ACPI_ACTIVE_LOW ?
 327                         IORESOURCE_IRQ_LOWLEVEL : IORESOURCE_IRQ_HIGHLEVEL;
 328         else
 329                 flags = polarity == ACPI_ACTIVE_LOW ?
 330                         IORESOURCE_IRQ_LOWEDGE : IORESOURCE_IRQ_HIGHEDGE;
 331
 332         if (shareable == ACPI_SHARED)
 333                 flags |= IORESOURCE_IRQ_SHAREABLE;
 334
 335         return flags | IORESOURCE_IRQ;
 336 }
 337 EXPORT_SYMBOL_GPL(acpi_dev_irq_flags);
 338
 339 static void acpi_dev_irqresource_disabled(struct resource *res, u32 gsi)
 340 {
 341         res->start = gsi;
 342         res->end = gsi;
 343         res->flags = IORESOURCE_IRQ | IORESOURCE_DISABLED | IORESOURCE_UNSET;
 344 }
 345
 346 static void acpi_dev_get_irqresource(struct resource *res, u32 gsi,
 347                                      u8 triggering, u8 polarity, u8 shareable,
 348                                      bool legacy)
 349 {
 350         int irq, p, t;
 351
 352         if (!valid_IRQ(gsi)) {
 353                 acpi_dev_irqresource_disabled(res, gsi);
 354                 return;
 355         }
 356
 357         /*
 358          * In IO-APIC mode, use overrided attribute. Two reasons:
 359          * 1. BIOS bug in DSDT
 360          * 2. BIOS uses IO-APIC mode Interrupt Source Override
 361          *
 362          * We do this only if we are dealing with IRQ() or IRQNoFlags()
 363          * resource (the legacy ISA resources). With modern ACPI 5 devices
 364          * using extended IRQ descriptors we take the IRQ configuration
 365          * from _CRS directly.
 366          */
 367         if (legacy && !acpi_get_override_irq(gsi, &t, &p)) {
 368                 u8 trig = t ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
 369                 u8 pol = p ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
 370
 371                 if (triggering != trig || polarity != pol) {
 372                         pr_warning("ACPI: IRQ %d override to %s, %s\n", gsi,
 373                                    t ? "level" : "edge", p ? "low" : "high");
 374                         triggering = trig;
 375                         polarity = pol;
 376                 }
 377         }
 378
 379         res->flags = acpi_dev_irq_flags(triggering, polarity, shareable);
 380         irq = acpi_register_gsi(NULL, gsi, triggering, polarity);
 381         if (irq >= 0) {
 382                 res->start = irq;
 383                 res->end = irq;
 384         } else {
 385                 acpi_dev_irqresource_disabled(res, gsi);
 386         }
 387 }
 388
 389 /**
 390  * acpi_dev_resource_interrupt - Extract ACPI interrupt resource information.
 391  * @ares: Input ACPI resource object.
 392  * @index: Index into the array of GSIs represented by the resource.
 393  * @res: Output generic resource object.
 394  *
 395  * Check if the given ACPI resource object represents an interrupt resource
 396  * and @index does not exceed the resource's interrupt count (true is returned
 397  * in that case regardless of the results of the other checks)).  If that's the
 398  * case, register the GSI corresponding to @index from the array of interrupts
 399  * represented by the resource and populate the generic resource object pointed
 400  * to by @res accordingly.  If the registration of the GSI is not successful,
 401  * IORESOURCE_DISABLED will be set it that object's flags.
 402  *
 403  * Return:
 404  * 1) false with res->flags setting to zero: not the expected resource type
 405  * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource
 406  * 3) true: valid assigned resource
 407  */
 408 bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index,
 409                                  struct resource *res)
 410 {
 411         struct acpi_resource_irq *irq;
 412         struct acpi_resource_extended_irq *ext_irq;
 413
 414         switch (ares->type) {
 415         case ACPI_RESOURCE_TYPE_IRQ:
 416                 /*
 417                  * Per spec, only one interrupt per descriptor is allowed in
 418                  * _CRS, but some firmware violates this, so parse them all.
 419                  */
 420                 irq = &ares->data.irq;
 421                 if (index >= irq->interrupt_count) {
 422                         acpi_dev_irqresource_disabled(res, 0);
 423                         return false;
 424                 }
 425                 acpi_dev_get_irqresource(res, irq->interrupts[index],
 426                                          irq->triggering, irq->polarity,
 427                                          irq->sharable, true);
 428                 break;
 429         case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
 430                 ext_irq = &ares->data.extended_irq;
 431                 if (index >= ext_irq->interrupt_count) {
 432                         acpi_dev_irqresource_disabled(res, 0);
 433                         return false;
 434                 }
 435                 acpi_dev_get_irqresource(res, ext_irq->interrupts[index],
 436                                          ext_irq->triggering, ext_irq->polarity,
 437                                          ext_irq->sharable, false);
 438                 break;
 439         default:
 440                 res->flags = 0;
 441                 return false;
 442         }
 443
 444         return true;
 445 }
 446 EXPORT_SYMBOL_GPL(acpi_dev_resource_interrupt);
 447
 448 /**
 449  * acpi_dev_free_resource_list - Free resource from %acpi_dev_get_resources().
 450  * @list: The head of the resource list to free.
 451  */
 452 void acpi_dev_free_resource_list(struct list_head *list)
 453 {
 454         resource_list_free(list);
 455 }
 456 EXPORT_SYMBOL_GPL(acpi_dev_free_resource_list);
 457
 458 struct res_proc_context {
 459         struct list_head *list;
 460         int (*preproc)(struct acpi_resource *, void *);
 461         void *preproc_data;
 462         int count;
 463         int error;
 464 };
 465
 466 static acpi_status acpi_dev_new_resource_entry(struct resource_win *win,
 467                                                struct res_proc_context *c)
 468 {
 469         struct resource_entry *rentry;
 470
 471         rentry = resource_list_create_entry(NULL, 0);
 472         if (!rentry) {
 473                 c->error = -ENOMEM;
 474                 return AE_NO_MEMORY;
 475         }
 476         *rentry->res = win->res;
 477         rentry->offset = win->offset;
 478         resource_list_add_tail(rentry, c->list);
 479         c->count++;
 480         return AE_OK;
 481 }
 482
 483 static acpi_status acpi_dev_process_resource(struct acpi_resource *ares,
 484                                              void *context)
 485 {
 486         struct res_proc_context *c = context;
 487         struct resource_win win;
 488         struct resource *res = &win.res;
 489         int i;
 490
 491         if (c->preproc) {
 492                 int ret;
 493
 494                 ret = c->preproc(ares, c->preproc_data);
 495                 if (ret < 0) {
 496                         c->error = ret;
 497                         return AE_CTRL_TERMINATE;
 498                 } else if (ret > 0) {
 499                         return AE_OK;
 500                 }
 501         }
 502
 503         memset(&win, 0, sizeof(win));
 504
 505         if (acpi_dev_resource_memory(ares, res)
 506             || acpi_dev_resource_io(ares, res)
 507             || acpi_dev_resource_address_space(ares, &win)
 508             || acpi_dev_resource_ext_address_space(ares, &win))
 509                 return acpi_dev_new_resource_entry(&win, c);
 510
 511         for (i = 0; acpi_dev_resource_interrupt(ares, i, res); i++) {
 512                 acpi_status status;
 513
 514                 status = acpi_dev_new_resource_entry(&win, c);
 515                 if (ACPI_FAILURE(status))
 516                         return status;
 517         }
 518
 519         return AE_OK;
 520 }
 521
 522 /**
 523  * acpi_dev_get_resources - Get current resources of a device.
 524  * @adev: ACPI device node to get the resources for.
 525  * @list: Head of the resultant list of resources (must be empty).
 526  * @preproc: The caller's preprocessing routine.
 527  * @preproc_data: Pointer passed to the caller's preprocessing routine.
 528  *
 529  * Evaluate the _CRS method for the given device node and process its output by
 530  * (1) executing the @preproc() rountine provided by the caller, passing the
 531  * resource pointer and @preproc_data to it as arguments, for each ACPI resource
 532  * returned and (2) converting all of the returned ACPI resources into struct
 533  * resource objects if possible.  If the return value of @preproc() in step (1)
 534  * is different from 0, step (2) is not applied to the given ACPI resource and
 535  * if that value is negative, the whole processing is aborted and that value is
 536  * returned as the final error code.
 537  *
 538  * The resultant struct resource objects are put on the list pointed to by
 539  * @list, that must be empty initially, as members of struct resource_entry
 540  * objects.  Callers of this routine should use %acpi_dev_free_resource_list() to
 541  * free that list.
 542  *
 543  * The number of resources in the output list is returned on success, an error
 544  * code reflecting the error condition is returned otherwise.
 545  */
 546 int acpi_dev_get_resources(struct acpi_device *adev, struct list_head *list,
 547                            int (*preproc)(struct acpi_resource *, void *),
 548                            void *preproc_data)
 549 {
 550         struct res_proc_context c;
 551         acpi_status status;
 552
 553         if (!adev || !adev->handle || !list_empty(list))
 554                 return -EINVAL;
 555
 556         if (!acpi_has_method(adev->handle, METHOD_NAME__CRS))
 557                 return 0;
 558
 559         c.list = list;
 560         c.preproc = preproc;
 561         c.preproc_data = preproc_data;
 562         c.count = 0;
 563         c.error = 0;
 564         status = acpi_walk_resources(adev->handle, METHOD_NAME__CRS,
 565                                      acpi_dev_process_resource, &c);
 566         if (ACPI_FAILURE(status)) {
 567                 acpi_dev_free_resource_list(list);
 568                 return c.error ? c.error : -EIO;
 569         }
 570
 571         return c.count;
 572 }
 573 EXPORT_SYMBOL_GPL(acpi_dev_get_resources);
 574
 575 /**
 576  * acpi_dev_filter_resource_type - Filter ACPI resource according to resource
 577  *                                 types
 578  * @ares: Input ACPI resource object.
 579  * @types: Valid resource types of IORESOURCE_XXX
 580  *
 581  * This is a helper function to support acpi_dev_get_resources(), which filters
 582  * ACPI resource objects according to resource types.
 583  */
 584 int acpi_dev_filter_resource_type(struct acpi_resource *ares,
 585                                   unsigned long types)
 586 {
 587         unsigned long type = 0;
 588
 589         switch (ares->type) {
 590         case ACPI_RESOURCE_TYPE_MEMORY24:
 591         case ACPI_RESOURCE_TYPE_MEMORY32:
 592         case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
 593                 type = IORESOURCE_MEM;
 594                 break;
 595         case ACPI_RESOURCE_TYPE_IO:
 596         case ACPI_RESOURCE_TYPE_FIXED_IO:
 597                 type = IORESOURCE_IO;
 598                 break;
 599         case ACPI_RESOURCE_TYPE_IRQ:
 600         case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
 601                 type = IORESOURCE_IRQ;
 602                 break;
 603         case ACPI_RESOURCE_TYPE_DMA:
 604         case ACPI_RESOURCE_TYPE_FIXED_DMA:
 605                 type = IORESOURCE_DMA;
 606                 break;
 607         case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
 608                 type = IORESOURCE_REG;
 609                 break;
 610         case ACPI_RESOURCE_TYPE_ADDRESS16:
 611         case ACPI_RESOURCE_TYPE_ADDRESS32:
 612         case ACPI_RESOURCE_TYPE_ADDRESS64:
 613         case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
 614                 if (ares->data.address.resource_type == ACPI_MEMORY_RANGE)
 615                         type = IORESOURCE_MEM;
 616                 else if (ares->data.address.resource_type == ACPI_IO_RANGE)
 617                         type = IORESOURCE_IO;
 618                 else if (ares->data.address.resource_type ==
 619                          ACPI_BUS_NUMBER_RANGE)
 620                         type = IORESOURCE_BUS;
 621                 break;
 622         default:
 623                 break;
 624         }
 625
 626         return (type & types) ? 0 : 1;
 627 }
 628 EXPORT_SYMBOL_GPL(acpi_dev_filter_resource_type);