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