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  *  You should have received a copy of the GNU General Public License along
  19  *  with this program; if not, write to the Free Software Foundation, Inc.,
  20  *  59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
  21  *
  22  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  23  */
  24
  25 #include <linux/acpi.h>
  26 #include <linux/device.h>
  27 #include <linux/export.h>
  28 #include <linux/ioport.h>
  29 #include <linux/slab.h>
  30
  31 #ifdef CONFIG_X86
  32 #define valid_IRQ(i) (((i) != 0) && ((i) != 2))
  33 #else
  34 #define valid_IRQ(i) (true)
  35 #endif
  36
  37 static bool acpi_dev_resource_len_valid(u64 start, u64 end, u64 len, bool io)
  38 {
  39         u64 reslen = end - start + 1;
  40
  41         /*
  42          * CHECKME: len might be required to check versus a minimum
  43          * length as well. 1 for io is fine, but for memory it does
  44          * not make any sense at all.
  45          */
  46         if (len && reslen && reslen == len && start <= end)
  47                 return true;
  48
  49         pr_info("ACPI: invalid or unassigned resource %s [%016llx - %016llx] length [%016llx]\n",
  50                 io ? "io" : "mem", start, end, len);
  51
  52         return false;
  53 }
  54
  55 static void acpi_dev_memresource_flags(struct resource *res, u64 len,
  56                                        u8 write_protect)
  57 {
  58         res->flags = IORESOURCE_MEM;
  59
  60         if (!acpi_dev_resource_len_valid(res->start, res->end, len, false))
  61                 res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET;
  62
  63         if (write_protect == ACPI_READ_WRITE_MEMORY)
  64                 res->flags |= IORESOURCE_MEM_WRITEABLE;
  65 }
  66
  67 static void acpi_dev_get_memresource(struct resource *res, u64 start, u64 len,
  68                                      u8 write_protect)
  69 {
  70         res->start = start;
  71         res->end = start + len - 1;
  72         acpi_dev_memresource_flags(res, len, write_protect);
  73 }
  74
  75 /**
  76  * acpi_dev_resource_memory - Extract ACPI memory resource information.
  77  * @ares: Input ACPI resource object.
  78  * @res: Output generic resource object.
  79  *
  80  * Check if the given ACPI resource object represents a memory resource and
  81  * if that's the case, use the information in it to populate the generic
  82  * resource object pointed to by @res.
  83  *
  84  * Return:
  85  * 1) false with res->flags setting to zero: not the expected resource type
  86  * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource
  87  * 3) true: valid assigned resource
  88  */
  89 bool acpi_dev_resource_memory(struct acpi_resource *ares, struct resource *res)
  90 {
  91         struct acpi_resource_memory24 *memory24;
  92         struct acpi_resource_memory32 *memory32;
  93         struct acpi_resource_fixed_memory32 *fixed_memory32;
  94
  95         switch (ares->type) {
  96         case ACPI_RESOURCE_TYPE_MEMORY24:
  97                 memory24 = &ares->data.memory24;
  98                 acpi_dev_get_memresource(res, memory24->minimum << 8,
  99                                          memory24->address_length << 8,
 100                                          memory24->write_protect);
 101                 break;
 102         case ACPI_RESOURCE_TYPE_MEMORY32:
 103                 memory32 = &ares->data.memory32;
 104                 acpi_dev_get_memresource(res, memory32->minimum,
 105                                          memory32->address_length,
 106                                          memory32->write_protect);
 107                 break;
 108         case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
 109                 fixed_memory32 = &ares->data.fixed_memory32;
 110                 acpi_dev_get_memresource(res, fixed_memory32->address,
 111                                          fixed_memory32->address_length,
 112                                          fixed_memory32->write_protect);
 113                 break;
 114         default:
 115                 res->flags = 0;
 116                 return false;
 117         }
 118
 119         return !(res->flags & IORESOURCE_DISABLED);
 120 }
 121 EXPORT_SYMBOL_GPL(acpi_dev_resource_memory);
 122
 123 static void acpi_dev_ioresource_flags(struct resource *res, u64 len,
 124                                       u8 io_decode)
 125 {
 126         res->flags = IORESOURCE_IO;
 127
 128         if (!acpi_dev_resource_len_valid(res->start, res->end, len, true))
 129                 res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET;
 130
 131         if (res->end >= 0x10003)
 132                 res->flags |= IORESOURCE_DISABLED | IORESOURCE_UNSET;
 133
 134         if (io_decode == ACPI_DECODE_16)
 135                 res->flags |= IORESOURCE_IO_16BIT_ADDR;
 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);
 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         struct resource *res = &win->res;
 195
 196         /*
 197          * Filter out invalid descriptor according to ACPI Spec 5.0, section
 198          * 6.4.3.5 Address Space Resource Descriptors.
 199          */
 200         if ((addr->min_address_fixed != addr->max_address_fixed && len) ||
 201             (addr->min_address_fixed && addr->max_address_fixed && !len))
 202                 pr_debug("ACPI: Invalid address space min_addr_fix %d, max_addr_fix %d, len %llx\n",
 203                          addr->min_address_fixed, addr->max_address_fixed, len);
 204
 205         res->start = attr->minimum;
 206         res->end = attr->maximum;
 207
 208         /*
 209          * For bridges that translate addresses across the bridge,
 210          * translation_offset is the offset that must be added to the
 211          * address on the secondary side to obtain the address on the
 212          * primary side. Non-bridge devices must list 0 for all Address
 213          * Translation offset bits.
 214          */
 215         if (addr->producer_consumer == ACPI_PRODUCER) {
 216                 res->start += attr->translation_offset;
 217                 res->end += attr->translation_offset;
 218         } else if (attr->translation_offset) {
 219                 pr_debug("ACPI: translation_offset(%lld) is invalid for non-bridge device.\n",
 220                          attr->translation_offset);
 221         }
 222
 223         switch (addr->resource_type) {
 224         case ACPI_MEMORY_RANGE:
 225                 acpi_dev_memresource_flags(res, len, wp);
 226                 break;
 227         case ACPI_IO_RANGE:
 228                 acpi_dev_ioresource_flags(res, len, iodec);
 229                 break;
 230         case ACPI_BUS_NUMBER_RANGE:
 231                 res->flags = IORESOURCE_BUS;
 232                 break;
 233         default:
 234                 return false;
 235         }
 236
 237         win->offset = attr->translation_offset;
 238
 239         if (addr->producer_consumer == ACPI_PRODUCER)
 240                 res->flags |= IORESOURCE_WINDOW;
 241
 242         if (addr->info.mem.caching == ACPI_PREFETCHABLE_MEMORY)
 243                 res->flags |= IORESOURCE_PREFETCH;
 244
 245         return !(res->flags & IORESOURCE_DISABLED);
 246 }
 247
 248 /**
 249  * acpi_dev_resource_address_space - Extract ACPI address space information.
 250  * @ares: Input ACPI resource object.
 251  * @win: Output generic resource object.
 252  *
 253  * Check if the given ACPI resource object represents an address space resource
 254  * and if that's the case, use the information in it to populate the generic
 255  * resource object pointed to by @win.
 256  *
 257  * Return:
 258  * 1) false with win->res.flags setting to zero: not the expected resource type
 259  * 2) false with IORESOURCE_DISABLED in win->res.flags: valid unassigned
 260  *    resource
 261  * 3) true: valid assigned resource
 262  */
 263 bool acpi_dev_resource_address_space(struct acpi_resource *ares,
 264                                      struct resource_win *win)
 265 {
 266         struct acpi_resource_address64 addr;
 267
 268         win->res.flags = 0;
 269         if (ACPI_FAILURE(acpi_resource_to_address64(ares, &addr)))
 270                 return false;
 271
 272         return acpi_decode_space(win, (struct acpi_resource_address *)&addr,
 273                                  &addr.address);
 274 }
 275 EXPORT_SYMBOL_GPL(acpi_dev_resource_address_space);
 276
 277 /**
 278  * acpi_dev_resource_ext_address_space - Extract ACPI address space information.
 279  * @ares: Input ACPI resource object.
 280  * @win: Output generic resource object.
 281  *
 282  * Check if the given ACPI resource object represents an extended address space
 283  * resource and if that's the case, use the information in it to populate the
 284  * generic resource object pointed to by @win.
 285  *
 286  * Return:
 287  * 1) false with win->res.flags setting to zero: not the expected resource type
 288  * 2) false with IORESOURCE_DISABLED in win->res.flags: valid unassigned
 289  *    resource
 290  * 3) true: valid assigned resource
 291  */
 292 bool acpi_dev_resource_ext_address_space(struct acpi_resource *ares,
 293                                          struct resource_win *win)
 294 {
 295         struct acpi_resource_extended_address64 *ext_addr;
 296
 297         win->res.flags = 0;
 298         if (ares->type != ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64)
 299                 return false;
 300
 301         ext_addr = &ares->data.ext_address64;
 302
 303         return acpi_decode_space(win, (struct acpi_resource_address *)ext_addr,
 304                                  &ext_addr->address);
 305 }
 306 EXPORT_SYMBOL_GPL(acpi_dev_resource_ext_address_space);
 307
 308 /**
 309  * acpi_dev_irq_flags - Determine IRQ resource flags.
 310  * @triggering: Triggering type as provided by ACPI.
 311  * @polarity: Interrupt polarity as provided by ACPI.
 312  * @shareable: Whether or not the interrupt is shareable.
 313  */
 314 unsigned long acpi_dev_irq_flags(u8 triggering, u8 polarity, u8 shareable)
 315 {
 316         unsigned long flags;
 317
 318         if (triggering == ACPI_LEVEL_SENSITIVE)
 319                 flags = polarity == ACPI_ACTIVE_LOW ?
 320                         IORESOURCE_IRQ_LOWLEVEL : IORESOURCE_IRQ_HIGHLEVEL;
 321         else
 322                 flags = polarity == ACPI_ACTIVE_LOW ?
 323                         IORESOURCE_IRQ_LOWEDGE : IORESOURCE_IRQ_HIGHEDGE;
 324
 325         if (shareable == ACPI_SHARED)
 326                 flags |= IORESOURCE_IRQ_SHAREABLE;
 327
 328         return flags | IORESOURCE_IRQ;
 329 }
 330 EXPORT_SYMBOL_GPL(acpi_dev_irq_flags);
 331
 332 static void acpi_dev_irqresource_disabled(struct resource *res, u32 gsi)
 333 {
 334         res->start = gsi;
 335         res->end = gsi;
 336         res->flags = IORESOURCE_IRQ | IORESOURCE_DISABLED | IORESOURCE_UNSET;
 337 }
 338
 339 static void acpi_dev_get_irqresource(struct resource *res, u32 gsi,
 340                                      u8 triggering, u8 polarity, u8 shareable,
 341                                      bool legacy)
 342 {
 343         int irq, p, t;
 344
 345         if (!valid_IRQ(gsi)) {
 346                 acpi_dev_irqresource_disabled(res, gsi);
 347                 return;
 348         }
 349
 350         /*
 351          * In IO-APIC mode, use overrided attribute. Two reasons:
 352          * 1. BIOS bug in DSDT
 353          * 2. BIOS uses IO-APIC mode Interrupt Source Override
 354          *
 355          * We do this only if we are dealing with IRQ() or IRQNoFlags()
 356          * resource (the legacy ISA resources). With modern ACPI 5 devices
 357          * using extended IRQ descriptors we take the IRQ configuration
 358          * from _CRS directly.
 359          */
 360         if (legacy && !acpi_get_override_irq(gsi, &t, &p)) {
 361                 u8 trig = t ? ACPI_LEVEL_SENSITIVE : ACPI_EDGE_SENSITIVE;
 362                 u8 pol = p ? ACPI_ACTIVE_LOW : ACPI_ACTIVE_HIGH;
 363
 364                 if (triggering != trig || polarity != pol) {
 365                         pr_warning("ACPI: IRQ %d override to %s, %s\n", gsi,
 366                                    t ? "level" : "edge", p ? "low" : "high");
 367                         triggering = trig;
 368                         polarity = pol;
 369                 }
 370         }
 371
 372         res->flags = acpi_dev_irq_flags(triggering, polarity, shareable);
 373         irq = acpi_register_gsi(NULL, gsi, triggering, polarity);
 374         if (irq >= 0) {
 375                 res->start = irq;
 376                 res->end = irq;
 377         } else {
 378                 acpi_dev_irqresource_disabled(res, gsi);
 379         }
 380 }
 381
 382 /**
 383  * acpi_dev_resource_interrupt - Extract ACPI interrupt resource information.
 384  * @ares: Input ACPI resource object.
 385  * @index: Index into the array of GSIs represented by the resource.
 386  * @res: Output generic resource object.
 387  *
 388  * Check if the given ACPI resource object represents an interrupt resource
 389  * and @index does not exceed the resource's interrupt count (true is returned
 390  * in that case regardless of the results of the other checks)).  If that's the
 391  * case, register the GSI corresponding to @index from the array of interrupts
 392  * represented by the resource and populate the generic resource object pointed
 393  * to by @res accordingly.  If the registration of the GSI is not successful,
 394  * IORESOURCE_DISABLED will be set it that object's flags.
 395  *
 396  * Return:
 397  * 1) false with res->flags setting to zero: not the expected resource type
 398  * 2) false with IORESOURCE_DISABLED in res->flags: valid unassigned resource
 399  * 3) true: valid assigned resource
 400  */
 401 bool acpi_dev_resource_interrupt(struct acpi_resource *ares, int index,
 402                                  struct resource *res)
 403 {
 404         struct acpi_resource_irq *irq;
 405         struct acpi_resource_extended_irq *ext_irq;
 406
 407         switch (ares->type) {
 408         case ACPI_RESOURCE_TYPE_IRQ:
 409                 /*
 410                  * Per spec, only one interrupt per descriptor is allowed in
 411                  * _CRS, but some firmware violates this, so parse them all.
 412                  */
 413                 irq = &ares->data.irq;
 414                 if (index >= irq->interrupt_count) {
 415                         acpi_dev_irqresource_disabled(res, 0);
 416                         return false;
 417                 }
 418                 acpi_dev_get_irqresource(res, irq->interrupts[index],
 419                                          irq->triggering, irq->polarity,
 420                                          irq->sharable, true);
 421                 break;
 422         case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
 423                 ext_irq = &ares->data.extended_irq;
 424                 if (index >= ext_irq->interrupt_count) {
 425                         acpi_dev_irqresource_disabled(res, 0);
 426                         return false;
 427                 }
 428                 acpi_dev_get_irqresource(res, ext_irq->interrupts[index],
 429                                          ext_irq->triggering, ext_irq->polarity,
 430                                          ext_irq->sharable, false);
 431                 break;
 432         default:
 433                 res->flags = 0;
 434                 return false;
 435         }
 436
 437         return true;
 438 }
 439 EXPORT_SYMBOL_GPL(acpi_dev_resource_interrupt);
 440
 441 /**
 442  * acpi_dev_free_resource_list - Free resource from %acpi_dev_get_resources().
 443  * @list: The head of the resource list to free.
 444  */
 445 void acpi_dev_free_resource_list(struct list_head *list)
 446 {
 447         resource_list_free(list);
 448 }
 449 EXPORT_SYMBOL_GPL(acpi_dev_free_resource_list);
 450
 451 struct res_proc_context {
 452         struct list_head *list;
 453         int (*preproc)(struct acpi_resource *, void *);
 454         void *preproc_data;
 455         int count;
 456         int error;
 457 };
 458
 459 static acpi_status acpi_dev_new_resource_entry(struct resource_win *win,
 460                                                struct res_proc_context *c)
 461 {
 462         struct resource_entry *rentry;
 463
 464         rentry = resource_list_create_entry(NULL, 0);
 465         if (!rentry) {
 466                 c->error = -ENOMEM;
 467                 return AE_NO_MEMORY;
 468         }
 469         *rentry->res = win->res;
 470         rentry->offset = win->offset;
 471         resource_list_add_tail(rentry, c->list);
 472         c->count++;
 473         return AE_OK;
 474 }
 475
 476 static acpi_status acpi_dev_process_resource(struct acpi_resource *ares,
 477                                              void *context)
 478 {
 479         struct res_proc_context *c = context;
 480         struct resource_win win;
 481         struct resource *res = &win.res;
 482         int i;
 483
 484         if (c->preproc) {
 485                 int ret;
 486
 487                 ret = c->preproc(ares, c->preproc_data);
 488                 if (ret < 0) {
 489                         c->error = ret;
 490                         return AE_CTRL_TERMINATE;
 491                 } else if (ret > 0) {
 492                         return AE_OK;
 493                 }
 494         }
 495
 496         memset(&win, 0, sizeof(win));
 497
 498         if (acpi_dev_resource_memory(ares, res)
 499             || acpi_dev_resource_io(ares, res)
 500             || acpi_dev_resource_address_space(ares, &win)
 501             || acpi_dev_resource_ext_address_space(ares, &win))
 502                 return acpi_dev_new_resource_entry(&win, c);
 503
 504         for (i = 0; acpi_dev_resource_interrupt(ares, i, res); i++) {
 505                 acpi_status status;
 506
 507                 status = acpi_dev_new_resource_entry(&win, c);
 508                 if (ACPI_FAILURE(status))
 509                         return status;
 510         }
 511
 512         return AE_OK;
 513 }
 514
 515 /**
 516  * acpi_dev_get_resources - Get current resources of a device.
 517  * @adev: ACPI device node to get the resources for.
 518  * @list: Head of the resultant list of resources (must be empty).
 519  * @preproc: The caller's preprocessing routine.
 520  * @preproc_data: Pointer passed to the caller's preprocessing routine.
 521  *
 522  * Evaluate the _CRS method for the given device node and process its output by
 523  * (1) executing the @preproc() rountine provided by the caller, passing the
 524  * resource pointer and @preproc_data to it as arguments, for each ACPI resource
 525  * returned and (2) converting all of the returned ACPI resources into struct
 526  * resource objects if possible.  If the return value of @preproc() in step (1)
 527  * is different from 0, step (2) is not applied to the given ACPI resource and
 528  * if that value is negative, the whole processing is aborted and that value is
 529  * returned as the final error code.
 530  *
 531  * The resultant struct resource objects are put on the list pointed to by
 532  * @list, that must be empty initially, as members of struct resource_entry
 533  * objects.  Callers of this routine should use %acpi_dev_free_resource_list() to
 534  * free that list.
 535  *
 536  * The number of resources in the output list is returned on success, an error
 537  * code reflecting the error condition is returned otherwise.
 538  */
 539 int acpi_dev_get_resources(struct acpi_device *adev, struct list_head *list,
 540                            int (*preproc)(struct acpi_resource *, void *),
 541                            void *preproc_data)
 542 {
 543         struct res_proc_context c;
 544         acpi_status status;
 545
 546         if (!adev || !adev->handle || !list_empty(list))
 547                 return -EINVAL;
 548
 549         if (!acpi_has_method(adev->handle, METHOD_NAME__CRS))
 550                 return 0;
 551
 552         c.list = list;
 553         c.preproc = preproc;
 554         c.preproc_data = preproc_data;
 555         c.count = 0;
 556         c.error = 0;
 557         status = acpi_walk_resources(adev->handle, METHOD_NAME__CRS,
 558                                      acpi_dev_process_resource, &c);
 559         if (ACPI_FAILURE(status)) {
 560                 acpi_dev_free_resource_list(list);
 561                 return c.error ? c.error : -EIO;
 562         }
 563
 564         return c.count;
 565 }
 566 EXPORT_SYMBOL_GPL(acpi_dev_get_resources);
 567
 568 /**
 569  * acpi_dev_filter_resource_type - Filter ACPI resource according to resource
 570  *                                 types
 571  * @ares: Input ACPI resource object.
 572  * @types: Valid resource types of IORESOURCE_XXX
 573  *
 574  * This is a hepler function to support acpi_dev_get_resources(), which filters
 575  * ACPI resource objects according to resource types.
 576  */
 577 int acpi_dev_filter_resource_type(struct acpi_resource *ares,
 578                                   unsigned long types)
 579 {
 580         unsigned long type = 0;
 581
 582         switch (ares->type) {
 583         case ACPI_RESOURCE_TYPE_MEMORY24:
 584         case ACPI_RESOURCE_TYPE_MEMORY32:
 585         case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
 586                 type = IORESOURCE_MEM;
 587                 break;
 588         case ACPI_RESOURCE_TYPE_IO:
 589         case ACPI_RESOURCE_TYPE_FIXED_IO:
 590                 type = IORESOURCE_IO;
 591                 break;
 592         case ACPI_RESOURCE_TYPE_IRQ:
 593         case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
 594                 type = IORESOURCE_IRQ;
 595                 break;
 596         case ACPI_RESOURCE_TYPE_DMA:
 597         case ACPI_RESOURCE_TYPE_FIXED_DMA:
 598                 type = IORESOURCE_DMA;
 599                 break;
 600         case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
 601                 type = IORESOURCE_REG;
 602                 break;
 603         case ACPI_RESOURCE_TYPE_ADDRESS16:
 604         case ACPI_RESOURCE_TYPE_ADDRESS32:
 605         case ACPI_RESOURCE_TYPE_ADDRESS64:
 606         case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
 607                 if (ares->data.address.resource_type == ACPI_MEMORY_RANGE)
 608                         type = IORESOURCE_MEM;
 609                 else if (ares->data.address.resource_type == ACPI_IO_RANGE)
 610                         type = IORESOURCE_IO;
 611                 else if (ares->data.address.resource_type ==
 612                          ACPI_BUS_NUMBER_RANGE)
 613                         type = IORESOURCE_BUS;
 614                 break;
 615         default:
 616                 break;
 617         }
 618
 619         return (type & types) ? 0 : 1;
 620 }
 621 EXPORT_SYMBOL_GPL(acpi_dev_filter_resource_type);