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   1 /*
   2  *  acpi_osl.c - OS-dependent functions ($Revision: 83 $)
   3  *
   4  *  Copyright (C) 2000       Andrew Henroid
   5  *  Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
   6  *  Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
   7  *
   8  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   9  *
  10  *  This program is free software; you can redistribute it and/or modify
  11  *  it under the terms of the GNU General Public License as published by
  12  *  the Free Software Foundation; either version 2 of the License, or
  13  *  (at your option) any later version.
  14  *
  15  *  This program is distributed in the hope that it will be useful,
  16  *  but WITHOUT ANY WARRANTY; without even the implied warranty of
  17  *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  18  *  GNU General Public License for more details.
  19  *
  20  *  You should have received a copy of the GNU General Public License
  21  *  along with this program; if not, write to the Free Software
  22  *  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
  23  *
  24  * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
  25  *
  26  */
  27
  28 #include <linux/module.h>
  29 #include <linux/kernel.h>
  30 #include <linux/slab.h>
  31 #include <linux/mm.h>
  32 #include <linux/pci.h>
  33 #include <linux/interrupt.h>
  34 #include <linux/kmod.h>
  35 #include <linux/delay.h>
  36 #include <linux/dmi.h>
  37 #include <linux/workqueue.h>
  38 #include <linux/nmi.h>
  39 #include <linux/acpi.h>
  40 #include <acpi/acpi.h>
  41 #include <asm/io.h>
  42 #include <acpi/acpi_bus.h>
  43 #include <acpi/processor.h>
  44 #include <asm/uaccess.h>
  45
  46 #include <linux/efi.h>
  47 #include <linux/ioport.h>
  48 #include <linux/list.h>
  49
  50 #define _COMPONENT              ACPI_OS_SERVICES
  51 ACPI_MODULE_NAME("osl");
  52 #define PREFIX          "ACPI: "
  53 struct acpi_os_dpc {
  54         acpi_osd_exec_callback function;
  55         void *context;
  56         struct work_struct work;
  57 };
  58
  59 #ifdef CONFIG_ACPI_CUSTOM_DSDT
  60 #include CONFIG_ACPI_CUSTOM_DSDT_FILE
  61 #endif
  62
  63 #ifdef ENABLE_DEBUGGER
  64 #include <linux/kdb.h>
  65
  66 /* stuff for debugger support */
  67 int acpi_in_debugger;
  68 EXPORT_SYMBOL(acpi_in_debugger);
  69
  70 extern char line_buf[80];
  71 #endif                          /*ENABLE_DEBUGGER */
  72
  73 static unsigned int acpi_irq_irq;
  74 static acpi_osd_handler acpi_irq_handler;
  75 static void *acpi_irq_context;
  76 static struct workqueue_struct *kacpid_wq;
  77 static struct workqueue_struct *kacpi_notify_wq;
  78
  79 struct acpi_res_list {
  80         resource_size_t start;
  81         resource_size_t end;
  82         acpi_adr_space_type resource_type; /* IO port, System memory, ...*/
  83         char name[5];   /* only can have a length of 4 chars, make use of this
  84                            one instead of res->name, no need to kalloc then */
  85         struct list_head resource_list;
  86 };
  87
  88 static LIST_HEAD(resource_list_head);
  89 static DEFINE_SPINLOCK(acpi_res_lock);
  90
  91 #define OSI_STRING_LENGTH_MAX 64        /* arbitrary */
  92 static char osi_additional_string[OSI_STRING_LENGTH_MAX];
  93
  94 #ifdef CONFIG_ACPI_CUSTOM_DSDT_INITRD
  95 static int acpi_no_initrd_override;
  96 #endif
  97
  98 /*
  99  * "Ode to _OSI(Linux)"
 100  *
 101  * osi_linux -- Control response to BIOS _OSI(Linux) query.
 102  *
 103  * As Linux evolves, the features that it supports change.
 104  * So an OSI string such as "Linux" is not specific enough
 105  * to be useful across multiple versions of Linux.  It
 106  * doesn't identify any particular feature, interface,
 107  * or even any particular version of Linux...
 108  *
 109  * Unfortunately, Linux-2.6.22 and earlier responded "yes"
 110  * to a BIOS _OSI(Linux) query.  When
 111  * a reference mobile BIOS started using it, its use
 112  * started to spread to many vendor platforms.
 113  * As it is not supportable, we need to halt that spread.
 114  *
 115  * Today, most BIOS references to _OSI(Linux) are noise --
 116  * they have no functional effect and are just dead code
 117  * carried over from the reference BIOS.
 118  *
 119  * The next most common case is that _OSI(Linux) harms Linux,
 120  * usually by causing the BIOS to follow paths that are
 121  * not tested during Windows validation.
 122  *
 123  * Finally, there is a short list of platforms
 124  * where OSI(Linux) benefits Linux.
 125  *
 126  * In Linux-2.6.23, OSI(Linux) is first disabled by default.
 127  * DMI is used to disable the dmesg warning about OSI(Linux)
 128  * on platforms where it is known to have no effect.
 129  * But a dmesg warning remains for systems where
 130  * we do not know if OSI(Linux) is good or bad for the system.
 131  * DMI is also used to enable OSI(Linux) for the machines
 132  * that are known to need it.
 133  *
 134  * BIOS writers should NOT query _OSI(Linux) on future systems.
 135  * It will be ignored by default, and to get Linux to
 136  * not ignore it will require a kernel source update to
 137  * add a DMI entry, or a boot-time "acpi_osi=Linux" invocation.
 138  */
 139 #define OSI_LINUX_ENABLE 0
 140
 141 static struct osi_linux {
 142         unsigned int    enable:1;
 143         unsigned int    dmi:1;
 144         unsigned int    cmdline:1;
 145         unsigned int    known:1;
 146 } osi_linux = { OSI_LINUX_ENABLE, 0, 0, 0};
 147
 148 static void __init acpi_request_region (struct acpi_generic_address *addr,
 149         unsigned int length, char *desc)
 150 {
 151         struct resource *res;
 152
 153         if (!addr->address || !length)
 154                 return;
 155
 156         if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_IO)
 157                 res = request_region(addr->address, length, desc);
 158         else if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY)
 159                 res = request_mem_region(addr->address, length, desc);
 160 }
 161
 162 static int __init acpi_reserve_resources(void)
 163 {
 164         acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length,
 165                 "ACPI PM1a_EVT_BLK");
 166
 167         acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length,
 168                 "ACPI PM1b_EVT_BLK");
 169
 170         acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length,
 171                 "ACPI PM1a_CNT_BLK");
 172
 173         acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length,
 174                 "ACPI PM1b_CNT_BLK");
 175
 176         if (acpi_gbl_FADT.pm_timer_length == 4)
 177                 acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR");
 178
 179         acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length,
 180                 "ACPI PM2_CNT_BLK");
 181
 182         /* Length of GPE blocks must be a non-negative multiple of 2 */
 183
 184         if (!(acpi_gbl_FADT.gpe0_block_length & 0x1))
 185                 acpi_request_region(&acpi_gbl_FADT.xgpe0_block,
 186                                acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK");
 187
 188         if (!(acpi_gbl_FADT.gpe1_block_length & 0x1))
 189                 acpi_request_region(&acpi_gbl_FADT.xgpe1_block,
 190                                acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK");
 191
 192         return 0;
 193 }
 194 device_initcall(acpi_reserve_resources);
 195
 196 acpi_status __init acpi_os_initialize(void)
 197 {
 198         return AE_OK;
 199 }
 200
 201 acpi_status acpi_os_initialize1(void)
 202 {
 203         kacpid_wq = create_singlethread_workqueue("kacpid");
 204         kacpi_notify_wq = create_singlethread_workqueue("kacpi_notify");
 205         BUG_ON(!kacpid_wq);
 206         BUG_ON(!kacpi_notify_wq);
 207         return AE_OK;
 208 }
 209
 210 acpi_status acpi_os_terminate(void)
 211 {
 212         if (acpi_irq_handler) {
 213                 acpi_os_remove_interrupt_handler(acpi_irq_irq,
 214                                                  acpi_irq_handler);
 215         }
 216
 217         destroy_workqueue(kacpid_wq);
 218         destroy_workqueue(kacpi_notify_wq);
 219
 220         return AE_OK;
 221 }
 222
 223 void acpi_os_printf(const char *fmt, ...)
 224 {
 225         va_list args;
 226         va_start(args, fmt);
 227         acpi_os_vprintf(fmt, args);
 228         va_end(args);
 229 }
 230
 231 void acpi_os_vprintf(const char *fmt, va_list args)
 232 {
 233         static char buffer[512];
 234
 235         vsprintf(buffer, fmt, args);
 236
 237 #ifdef ENABLE_DEBUGGER
 238         if (acpi_in_debugger) {
 239                 kdb_printf("%s", buffer);
 240         } else {
 241                 printk("%s", buffer);
 242         }
 243 #else
 244         printk("%s", buffer);
 245 #endif
 246 }
 247
 248 acpi_physical_address __init acpi_os_get_root_pointer(void)
 249 {
 250         if (efi_enabled) {
 251                 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
 252                         return efi.acpi20;
 253                 else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
 254                         return efi.acpi;
 255                 else {
 256                         printk(KERN_ERR PREFIX
 257                                "System description tables not found\n");
 258                         return 0;
 259                 }
 260         } else {
 261                 acpi_physical_address pa = 0;
 262
 263                 acpi_find_root_pointer(&pa);
 264                 return pa;
 265         }
 266 }
 267
 268 void __iomem *__init_refok
 269 acpi_os_map_memory(acpi_physical_address phys, acpi_size size)
 270 {
 271         if (phys > ULONG_MAX) {
 272                 printk(KERN_ERR PREFIX "Cannot map memory that high\n");
 273                 return NULL;
 274         }
 275         if (acpi_gbl_permanent_mmap)
 276                 /*
 277                 * ioremap checks to ensure this is in reserved space
 278                 */
 279                 return ioremap((unsigned long)phys, size);
 280         else
 281                 return __acpi_map_table((unsigned long)phys, size);
 282 }
 283 EXPORT_SYMBOL_GPL(acpi_os_map_memory);
 284
 285 void acpi_os_unmap_memory(void __iomem * virt, acpi_size size)
 286 {
 287         if (acpi_gbl_permanent_mmap) {
 288                 iounmap(virt);
 289         }
 290 }
 291 EXPORT_SYMBOL_GPL(acpi_os_unmap_memory);
 292
 293 #ifdef ACPI_FUTURE_USAGE
 294 acpi_status
 295 acpi_os_get_physical_address(void *virt, acpi_physical_address * phys)
 296 {
 297         if (!phys || !virt)
 298                 return AE_BAD_PARAMETER;
 299
 300         *phys = virt_to_phys(virt);
 301
 302         return AE_OK;
 303 }
 304 #endif
 305
 306 #define ACPI_MAX_OVERRIDE_LEN 100
 307
 308 static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN];
 309
 310 acpi_status
 311 acpi_os_predefined_override(const struct acpi_predefined_names *init_val,
 312                             acpi_string * new_val)
 313 {
 314         if (!init_val || !new_val)
 315                 return AE_BAD_PARAMETER;
 316
 317         *new_val = NULL;
 318         if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) {
 319                 printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n",
 320                        acpi_os_name);
 321                 *new_val = acpi_os_name;
 322         }
 323
 324         return AE_OK;
 325 }
 326
 327 #ifdef CONFIG_ACPI_CUSTOM_DSDT_INITRD
 328 struct acpi_table_header *acpi_find_dsdt_initrd(void)
 329 {
 330         struct file *firmware_file;
 331         mm_segment_t oldfs;
 332         unsigned long len, len2;
 333         struct acpi_table_header *dsdt_buffer, *ret = NULL;
 334         struct kstat stat;
 335         char *ramfs_dsdt_name = "/DSDT.aml";
 336
 337         printk(KERN_INFO PREFIX "Checking initramfs for custom DSDT\n");
 338
 339         /*
 340          * Never do this at home, only the user-space is allowed to open a file.
 341          * The clean way would be to use the firmware loader.
 342          * But this code must be run before there is any userspace available.
 343          * A static/init firmware infrastructure doesn't exist yet...
 344          */
 345         if (vfs_stat(ramfs_dsdt_name, &stat) < 0)
 346                 return ret;
 347
 348         len = stat.size;
 349         /* check especially against empty files */
 350         if (len <= 4) {
 351                 printk(KERN_ERR PREFIX "Failed: DSDT only %lu bytes.\n", len);
 352                 return ret;
 353         }
 354
 355         firmware_file = filp_open(ramfs_dsdt_name, O_RDONLY, 0);
 356         if (IS_ERR(firmware_file)) {
 357                 printk(KERN_ERR PREFIX "Failed to open %s.\n", ramfs_dsdt_name);
 358                 return ret;
 359         }
 360
 361         dsdt_buffer = kmalloc(len, GFP_ATOMIC);
 362         if (!dsdt_buffer) {
 363                 printk(KERN_ERR PREFIX "Failed to allocate %lu bytes.\n", len);
 364                 goto err;
 365         }
 366
 367         oldfs = get_fs();
 368         set_fs(KERNEL_DS);
 369         len2 = vfs_read(firmware_file, (char __user *)dsdt_buffer, len,
 370                 &firmware_file->f_pos);
 371         set_fs(oldfs);
 372         if (len2 < len) {
 373                 printk(KERN_ERR PREFIX "Failed to read %lu bytes from %s.\n",
 374                         len, ramfs_dsdt_name);
 375                 ACPI_FREE(dsdt_buffer);
 376                 goto err;
 377         }
 378
 379         printk(KERN_INFO PREFIX "Found %lu byte DSDT in %s.\n",
 380                         len, ramfs_dsdt_name);
 381         ret = dsdt_buffer;
 382 err:
 383         filp_close(firmware_file, NULL);
 384         return ret;
 385 }
 386 #endif
 387
 388 acpi_status
 389 acpi_os_table_override(struct acpi_table_header * existing_table,
 390                        struct acpi_table_header ** new_table)
 391 {
 392         if (!existing_table || !new_table)
 393                 return AE_BAD_PARAMETER;
 394
 395         *new_table = NULL;
 396
 397 #ifdef CONFIG_ACPI_CUSTOM_DSDT
 398         if (strncmp(existing_table->signature, "DSDT", 4) == 0)
 399                 *new_table = (struct acpi_table_header *)AmlCode;
 400 #endif
 401 #ifdef CONFIG_ACPI_CUSTOM_DSDT_INITRD
 402         if ((strncmp(existing_table->signature, "DSDT", 4) == 0) &&
 403             !acpi_no_initrd_override) {
 404                 struct acpi_table_header *initrd_table;
 405
 406                 initrd_table = acpi_find_dsdt_initrd();
 407                 if (initrd_table)
 408                         *new_table = initrd_table;
 409         }
 410 #endif
 411         if (*new_table != NULL) {
 412                 printk(KERN_WARNING PREFIX "Override [%4.4s-%8.8s], "
 413                            "this is unsafe: tainting kernel\n",
 414                        existing_table->signature,
 415                        existing_table->oem_table_id);
 416                 add_taint(TAINT_OVERRIDDEN_ACPI_TABLE);
 417         }
 418         return AE_OK;
 419 }
 420
 421 #ifdef CONFIG_ACPI_CUSTOM_DSDT_INITRD
 422 int __init acpi_no_initrd_override_setup(char *s)
 423 {
 424         acpi_no_initrd_override = 1;
 425         return 1;
 426 }
 427 __setup("acpi_no_initrd_override", acpi_no_initrd_override_setup);
 428 #endif
 429
 430 static irqreturn_t acpi_irq(int irq, void *dev_id)
 431 {
 432         u32 handled;
 433
 434         handled = (*acpi_irq_handler) (acpi_irq_context);
 435
 436         if (handled) {
 437                 acpi_irq_handled++;
 438                 return IRQ_HANDLED;
 439         } else
 440                 return IRQ_NONE;
 441 }
 442
 443 acpi_status
 444 acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler,
 445                                   void *context)
 446 {
 447         unsigned int irq;
 448
 449         acpi_irq_stats_init();
 450
 451         /*
 452          * Ignore the GSI from the core, and use the value in our copy of the
 453          * FADT. It may not be the same if an interrupt source override exists
 454          * for the SCI.
 455          */
 456         gsi = acpi_gbl_FADT.sci_interrupt;
 457         if (acpi_gsi_to_irq(gsi, &irq) < 0) {
 458                 printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n",
 459                        gsi);
 460                 return AE_OK;
 461         }
 462
 463         acpi_irq_handler = handler;
 464         acpi_irq_context = context;
 465         if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) {
 466                 printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq);
 467                 return AE_NOT_ACQUIRED;
 468         }
 469         acpi_irq_irq = irq;
 470
 471         return AE_OK;
 472 }
 473
 474 acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler)
 475 {
 476         if (irq) {
 477                 free_irq(irq, acpi_irq);
 478                 acpi_irq_handler = NULL;
 479                 acpi_irq_irq = 0;
 480         }
 481
 482         return AE_OK;
 483 }
 484
 485 /*
 486  * Running in interpreter thread context, safe to sleep
 487  */
 488
 489 void acpi_os_sleep(acpi_integer ms)
 490 {
 491         schedule_timeout_interruptible(msecs_to_jiffies(ms));
 492 }
 493
 494 void acpi_os_stall(u32 us)
 495 {
 496         while (us) {
 497                 u32 delay = 1000;
 498
 499                 if (delay > us)
 500                         delay = us;
 501                 udelay(delay);
 502                 touch_nmi_watchdog();
 503                 us -= delay;
 504         }
 505 }
 506
 507 /*
 508  * Support ACPI 3.0 AML Timer operand
 509  * Returns 64-bit free-running, monotonically increasing timer
 510  * with 100ns granularity
 511  */
 512 u64 acpi_os_get_timer(void)
 513 {
 514         static u64 t;
 515
 516 #ifdef  CONFIG_HPET
 517         /* TBD: use HPET if available */
 518 #endif
 519
 520 #ifdef  CONFIG_X86_PM_TIMER
 521         /* TBD: default to PM timer if HPET was not available */
 522 #endif
 523         if (!t)
 524                 printk(KERN_ERR PREFIX "acpi_os_get_timer() TBD\n");
 525
 526         return ++t;
 527 }
 528
 529 acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width)
 530 {
 531         u32 dummy;
 532
 533         if (!value)
 534                 value = &dummy;
 535
 536         *value = 0;
 537         if (width <= 8) {
 538                 *(u8 *) value = inb(port);
 539         } else if (width <= 16) {
 540                 *(u16 *) value = inw(port);
 541         } else if (width <= 32) {
 542                 *(u32 *) value = inl(port);
 543         } else {
 544                 BUG();
 545         }
 546
 547         return AE_OK;
 548 }
 549
 550 EXPORT_SYMBOL(acpi_os_read_port);
 551
 552 acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width)
 553 {
 554         if (width <= 8) {
 555                 outb(value, port);
 556         } else if (width <= 16) {
 557                 outw(value, port);
 558         } else if (width <= 32) {
 559                 outl(value, port);
 560         } else {
 561                 BUG();
 562         }
 563
 564         return AE_OK;
 565 }
 566
 567 EXPORT_SYMBOL(acpi_os_write_port);
 568
 569 acpi_status
 570 acpi_os_read_memory(acpi_physical_address phys_addr, u32 * value, u32 width)
 571 {
 572         u32 dummy;
 573         void __iomem *virt_addr;
 574
 575         virt_addr = ioremap(phys_addr, width);
 576         if (!value)
 577                 value = &dummy;
 578
 579         switch (width) {
 580         case 8:
 581                 *(u8 *) value = readb(virt_addr);
 582                 break;
 583         case 16:
 584                 *(u16 *) value = readw(virt_addr);
 585                 break;
 586         case 32:
 587                 *(u32 *) value = readl(virt_addr);
 588                 break;
 589         default:
 590                 BUG();
 591         }
 592
 593         iounmap(virt_addr);
 594
 595         return AE_OK;
 596 }
 597
 598 acpi_status
 599 acpi_os_write_memory(acpi_physical_address phys_addr, u32 value, u32 width)
 600 {
 601         void __iomem *virt_addr;
 602
 603         virt_addr = ioremap(phys_addr, width);
 604
 605         switch (width) {
 606         case 8:
 607                 writeb(value, virt_addr);
 608                 break;
 609         case 16:
 610                 writew(value, virt_addr);
 611                 break;
 612         case 32:
 613                 writel(value, virt_addr);
 614                 break;
 615         default:
 616                 BUG();
 617         }
 618
 619         iounmap(virt_addr);
 620
 621         return AE_OK;
 622 }
 623
 624 acpi_status
 625 acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
 626                                u32 *value, u32 width)
 627 {
 628         int result, size;
 629
 630         if (!value)
 631                 return AE_BAD_PARAMETER;
 632
 633         switch (width) {
 634         case 8:
 635                 size = 1;
 636                 break;
 637         case 16:
 638                 size = 2;
 639                 break;
 640         case 32:
 641                 size = 4;
 642                 break;
 643         default:
 644                 return AE_ERROR;
 645         }
 646
 647         result = raw_pci_read(pci_id->segment, pci_id->bus,
 648                                 PCI_DEVFN(pci_id->device, pci_id->function),
 649                                 reg, size, value);
 650
 651         return (result ? AE_ERROR : AE_OK);
 652 }
 653
 654 acpi_status
 655 acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
 656                                 acpi_integer value, u32 width)
 657 {
 658         int result, size;
 659
 660         switch (width) {
 661         case 8:
 662                 size = 1;
 663                 break;
 664         case 16:
 665                 size = 2;
 666                 break;
 667         case 32:
 668                 size = 4;
 669                 break;
 670         default:
 671                 return AE_ERROR;
 672         }
 673
 674         result = raw_pci_write(pci_id->segment, pci_id->bus,
 675                                 PCI_DEVFN(pci_id->device, pci_id->function),
 676                                 reg, size, value);
 677
 678         return (result ? AE_ERROR : AE_OK);
 679 }
 680
 681 /* TODO: Change code to take advantage of driver model more */
 682 static void acpi_os_derive_pci_id_2(acpi_handle rhandle,        /* upper bound  */
 683                                     acpi_handle chandle,        /* current node */
 684                                     struct acpi_pci_id **id,
 685                                     int *is_bridge, u8 * bus_number)
 686 {
 687         acpi_handle handle;
 688         struct acpi_pci_id *pci_id = *id;
 689         acpi_status status;
 690         unsigned long temp;
 691         acpi_object_type type;
 692
 693         acpi_get_parent(chandle, &handle);
 694         if (handle != rhandle) {
 695                 acpi_os_derive_pci_id_2(rhandle, handle, &pci_id, is_bridge,
 696                                         bus_number);
 697
 698                 status = acpi_get_type(handle, &type);
 699                 if ((ACPI_FAILURE(status)) || (type != ACPI_TYPE_DEVICE))
 700                         return;
 701
 702                 status =
 703                     acpi_evaluate_integer(handle, METHOD_NAME__ADR, NULL,
 704                                           &temp);
 705                 if (ACPI_SUCCESS(status)) {
 706                         u32 val;
 707                         pci_id->device = ACPI_HIWORD(ACPI_LODWORD(temp));
 708                         pci_id->function = ACPI_LOWORD(ACPI_LODWORD(temp));
 709
 710                         if (*is_bridge)
 711                                 pci_id->bus = *bus_number;
 712
 713                         /* any nicer way to get bus number of bridge ? */
 714                         status =
 715                             acpi_os_read_pci_configuration(pci_id, 0x0e, &val,
 716                                                            8);
 717                         if (ACPI_SUCCESS(status)
 718                             && ((val & 0x7f) == 1 || (val & 0x7f) == 2)) {
 719                                 status =
 720                                     acpi_os_read_pci_configuration(pci_id, 0x18,
 721                                                                    &val, 8);
 722                                 if (!ACPI_SUCCESS(status)) {
 723                                         /* Certainly broken...  FIX ME */
 724                                         return;
 725                                 }
 726                                 *is_bridge = 1;
 727                                 pci_id->bus = val;
 728                                 status =
 729                                     acpi_os_read_pci_configuration(pci_id, 0x19,
 730                                                                    &val, 8);
 731                                 if (ACPI_SUCCESS(status)) {
 732                                         *bus_number = val;
 733                                 }
 734                         } else
 735                                 *is_bridge = 0;
 736                 }
 737         }
 738 }
 739
 740 void acpi_os_derive_pci_id(acpi_handle rhandle, /* upper bound  */
 741                            acpi_handle chandle, /* current node */
 742                            struct acpi_pci_id **id)
 743 {
 744         int is_bridge = 1;
 745         u8 bus_number = (*id)->bus;
 746
 747         acpi_os_derive_pci_id_2(rhandle, chandle, id, &is_bridge, &bus_number);
 748 }
 749
 750 static void acpi_os_execute_deferred(struct work_struct *work)
 751 {
 752         struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work);
 753         if (!dpc) {
 754                 printk(KERN_ERR PREFIX "Invalid (NULL) context\n");
 755                 return;
 756         }
 757
 758         dpc->function(dpc->context);
 759         kfree(dpc);
 760
 761         return;
 762 }
 763
 764 /*******************************************************************************
 765  *
 766  * FUNCTION:    acpi_os_execute
 767  *
 768  * PARAMETERS:  Type               - Type of the callback
 769  *              Function           - Function to be executed
 770  *              Context            - Function parameters
 771  *
 772  * RETURN:      Status
 773  *
 774  * DESCRIPTION: Depending on type, either queues function for deferred execution or
 775  *              immediately executes function on a separate thread.
 776  *
 777  ******************************************************************************/
 778
 779 acpi_status acpi_os_execute(acpi_execute_type type,
 780                             acpi_osd_exec_callback function, void *context)
 781 {
 782         acpi_status status = AE_OK;
 783         struct acpi_os_dpc *dpc;
 784         struct workqueue_struct *queue;
 785         ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
 786                           "Scheduling function [%p(%p)] for deferred execution.\n",
 787                           function, context));
 788
 789         if (!function)
 790                 return AE_BAD_PARAMETER;
 791
 792         /*
 793          * Allocate/initialize DPC structure.  Note that this memory will be
 794          * freed by the callee.  The kernel handles the work_struct list  in a
 795          * way that allows us to also free its memory inside the callee.
 796          * Because we may want to schedule several tasks with different
 797          * parameters we can't use the approach some kernel code uses of
 798          * having a static work_struct.
 799          */
 800
 801         dpc = kmalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC);
 802         if (!dpc)
 803                 return_ACPI_STATUS(AE_NO_MEMORY);
 804
 805         dpc->function = function;
 806         dpc->context = context;
 807
 808         INIT_WORK(&dpc->work, acpi_os_execute_deferred);
 809         queue = (type == OSL_NOTIFY_HANDLER) ? kacpi_notify_wq : kacpid_wq;
 810         if (!queue_work(queue, &dpc->work)) {
 811                 ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
 812                           "Call to queue_work() failed.\n"));
 813                 status = AE_ERROR;
 814                 kfree(dpc);
 815         }
 816         return_ACPI_STATUS(status);
 817 }
 818
 819 EXPORT_SYMBOL(acpi_os_execute);
 820
 821 void acpi_os_wait_events_complete(void *context)
 822 {
 823         flush_workqueue(kacpid_wq);
 824 }
 825
 826 EXPORT_SYMBOL(acpi_os_wait_events_complete);
 827
 828 /*
 829  * Allocate the memory for a spinlock and initialize it.
 830  */
 831 acpi_status acpi_os_create_lock(acpi_spinlock * handle)
 832 {
 833         spin_lock_init(*handle);
 834
 835         return AE_OK;
 836 }
 837
 838 /*
 839  * Deallocate the memory for a spinlock.
 840  */
 841 void acpi_os_delete_lock(acpi_spinlock handle)
 842 {
 843         return;
 844 }
 845
 846 acpi_status
 847 acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle)
 848 {
 849         struct semaphore *sem = NULL;
 850
 851
 852         sem = acpi_os_allocate(sizeof(struct semaphore));
 853         if (!sem)
 854                 return AE_NO_MEMORY;
 855         memset(sem, 0, sizeof(struct semaphore));
 856
 857         sema_init(sem, initial_units);
 858
 859         *handle = (acpi_handle *) sem;
 860
 861         ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n",
 862                           *handle, initial_units));
 863
 864         return AE_OK;
 865 }
 866
 867 /*
 868  * TODO: A better way to delete semaphores?  Linux doesn't have a
 869  * 'delete_semaphore()' function -- may result in an invalid
 870  * pointer dereference for non-synchronized consumers.  Should
 871  * we at least check for blocked threads and signal/cancel them?
 872  */
 873
 874 acpi_status acpi_os_delete_semaphore(acpi_handle handle)
 875 {
 876         struct semaphore *sem = (struct semaphore *)handle;
 877
 878
 879         if (!sem)
 880                 return AE_BAD_PARAMETER;
 881
 882         ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle));
 883
 884         kfree(sem);
 885         sem = NULL;
 886
 887         return AE_OK;
 888 }
 889
 890 /*
 891  * TODO: The kernel doesn't have a 'down_timeout' function -- had to
 892  * improvise.  The process is to sleep for one scheduler quantum
 893  * until the semaphore becomes available.  Downside is that this
 894  * may result in starvation for timeout-based waits when there's
 895  * lots of semaphore activity.
 896  *
 897  * TODO: Support for units > 1?
 898  */
 899 acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout)
 900 {
 901         acpi_status status = AE_OK;
 902         struct semaphore *sem = (struct semaphore *)handle;
 903         int ret = 0;
 904
 905
 906         if (!sem || (units < 1))
 907                 return AE_BAD_PARAMETER;
 908
 909         if (units > 1)
 910                 return AE_SUPPORT;
 911
 912         ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n",
 913                           handle, units, timeout));
 914
 915         /*
 916          * This can be called during resume with interrupts off.
 917          * Like boot-time, we should be single threaded and will
 918          * always get the lock if we try -- timeout or not.
 919          * If this doesn't succeed, then we will oops courtesy of
 920          * might_sleep() in down().
 921          */
 922         if (!down_trylock(sem))
 923                 return AE_OK;
 924
 925         switch (timeout) {
 926                 /*
 927                  * No Wait:
 928                  * --------
 929                  * A zero timeout value indicates that we shouldn't wait - just
 930                  * acquire the semaphore if available otherwise return AE_TIME
 931                  * (a.k.a. 'would block').
 932                  */
 933         case 0:
 934                 if (down_trylock(sem))
 935                         status = AE_TIME;
 936                 break;
 937
 938                 /*
 939                  * Wait Indefinitely:
 940                  * ------------------
 941                  */
 942         case ACPI_WAIT_FOREVER:
 943                 down(sem);
 944                 break;
 945
 946                 /*
 947                  * Wait w/ Timeout:
 948                  * ----------------
 949                  */
 950         default:
 951                 // TODO: A better timeout algorithm?
 952                 {
 953                         int i = 0;
 954                         static const int quantum_ms = 1000 / HZ;
 955
 956                         ret = down_trylock(sem);
 957                         for (i = timeout; (i > 0 && ret != 0); i -= quantum_ms) {
 958                                 schedule_timeout_interruptible(1);
 959                                 ret = down_trylock(sem);
 960                         }
 961
 962                         if (ret != 0)
 963                                 status = AE_TIME;
 964                 }
 965                 break;
 966         }
 967
 968         if (ACPI_FAILURE(status)) {
 969                 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
 970                                   "Failed to acquire semaphore[%p|%d|%d], %s",
 971                                   handle, units, timeout,
 972                                   acpi_format_exception(status)));
 973         } else {
 974                 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
 975                                   "Acquired semaphore[%p|%d|%d]", handle,
 976                                   units, timeout));
 977         }
 978
 979         return status;
 980 }
 981
 982 /*
 983  * TODO: Support for units > 1?
 984  */
 985 acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units)
 986 {
 987         struct semaphore *sem = (struct semaphore *)handle;
 988
 989
 990         if (!sem || (units < 1))
 991                 return AE_BAD_PARAMETER;
 992
 993         if (units > 1)
 994                 return AE_SUPPORT;
 995
 996         ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle,
 997                           units));
 998
 999         up(sem);
1000
1001         return AE_OK;
1002 }
1003
1004 #ifdef ACPI_FUTURE_USAGE
1005 u32 acpi_os_get_line(char *buffer)
1006 {
1007
1008 #ifdef ENABLE_DEBUGGER
1009         if (acpi_in_debugger) {
1010                 u32 chars;
1011
1012                 kdb_read(buffer, sizeof(line_buf));
1013
1014                 /* remove the CR kdb includes */
1015                 chars = strlen(buffer) - 1;
1016                 buffer[chars] = '\0';
1017         }
1018 #endif
1019
1020         return 0;
1021 }
1022 #endif                          /*  ACPI_FUTURE_USAGE  */
1023
1024 acpi_status acpi_os_signal(u32 function, void *info)
1025 {
1026         switch (function) {
1027         case ACPI_SIGNAL_FATAL:
1028                 printk(KERN_ERR PREFIX "Fatal opcode executed\n");
1029                 break;
1030         case ACPI_SIGNAL_BREAKPOINT:
1031                 /*
1032                  * AML Breakpoint
1033                  * ACPI spec. says to treat it as a NOP unless
1034                  * you are debugging.  So if/when we integrate
1035                  * AML debugger into the kernel debugger its
1036                  * hook will go here.  But until then it is
1037                  * not useful to print anything on breakpoints.
1038                  */
1039                 break;
1040         default:
1041                 break;
1042         }
1043
1044         return AE_OK;
1045 }
1046
1047 static int __init acpi_os_name_setup(char *str)
1048 {
1049         char *p = acpi_os_name;
1050         int count = ACPI_MAX_OVERRIDE_LEN - 1;
1051
1052         if (!str || !*str)
1053                 return 0;
1054
1055         for (; count-- && str && *str; str++) {
1056                 if (isalnum(*str) || *str == ' ' || *str == ':')
1057                         *p++ = *str;
1058                 else if (*str == '\'' || *str == '"')
1059                         continue;
1060                 else
1061                         break;
1062         }
1063         *p = 0;
1064
1065         return 1;
1066
1067 }
1068
1069 __setup("acpi_os_name=", acpi_os_name_setup);
1070
1071 static void __init set_osi_linux(unsigned int enable)
1072 {
1073         if (osi_linux.enable != enable) {
1074                 osi_linux.enable = enable;
1075                 printk(KERN_NOTICE PREFIX "%sed _OSI(Linux)\n",
1076                         enable ? "Add": "Delet");
1077         }
1078         return;
1079 }
1080
1081 static void __init acpi_cmdline_osi_linux(unsigned int enable)
1082 {
1083         osi_linux.cmdline = 1;  /* cmdline set the default */
1084         set_osi_linux(enable);
1085
1086         return;
1087 }
1088
1089 void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d)
1090 {
1091         osi_linux.dmi = 1;      /* DMI knows that this box asks OSI(Linux) */
1092
1093         printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident);
1094
1095         if (enable == -1)
1096                 return;
1097
1098         osi_linux.known = 1;    /* DMI knows which OSI(Linux) default needed */
1099
1100         set_osi_linux(enable);
1101
1102         return;
1103 }
1104
1105 /*
1106  * Modify the list of "OS Interfaces" reported to BIOS via _OSI
1107  *
1108  * empty string disables _OSI
1109  * string starting with '!' disables that string
1110  * otherwise string is added to list, augmenting built-in strings
1111  */
1112 int __init acpi_osi_setup(char *str)
1113 {
1114         if (str == NULL || *str == '\0') {
1115                 printk(KERN_INFO PREFIX "_OSI method disabled\n");
1116                 acpi_gbl_create_osi_method = FALSE;
1117         } else if (!strcmp("!Linux", str)) {
1118                 acpi_cmdline_osi_linux(0);      /* !enable */
1119         } else if (*str == '!') {
1120                 if (acpi_osi_invalidate(++str) == AE_OK)
1121                         printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str);
1122         } else if (!strcmp("Linux", str)) {
1123                 acpi_cmdline_osi_linux(1);      /* enable */
1124         } else if (*osi_additional_string == '\0') {
1125                 strncpy(osi_additional_string, str, OSI_STRING_LENGTH_MAX);
1126                 printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str);
1127         }
1128
1129         return 1;
1130 }
1131
1132 __setup("acpi_osi=", acpi_osi_setup);
1133
1134 /* enable serialization to combat AE_ALREADY_EXISTS errors */
1135 static int __init acpi_serialize_setup(char *str)
1136 {
1137         printk(KERN_INFO PREFIX "serialize enabled\n");
1138
1139         acpi_gbl_all_methods_serialized = TRUE;
1140
1141         return 1;
1142 }
1143
1144 __setup("acpi_serialize", acpi_serialize_setup);
1145
1146 /*
1147  * Wake and Run-Time GPES are expected to be separate.
1148  * We disable wake-GPEs at run-time to prevent spurious
1149  * interrupts.
1150  *
1151  * However, if a system exists that shares Wake and
1152  * Run-time events on the same GPE this flag is available
1153  * to tell Linux to keep the wake-time GPEs enabled at run-time.
1154  */
1155 static int __init acpi_wake_gpes_always_on_setup(char *str)
1156 {
1157         printk(KERN_INFO PREFIX "wake GPEs not disabled\n");
1158
1159         acpi_gbl_leave_wake_gpes_disabled = FALSE;
1160
1161         return 1;
1162 }
1163
1164 __setup("acpi_wake_gpes_always_on", acpi_wake_gpes_always_on_setup);
1165
1166 /* Check of resource interference between native drivers and ACPI
1167  * OperationRegions (SystemIO and System Memory only).
1168  * IO ports and memory declared in ACPI might be used by the ACPI subsystem
1169  * in arbitrary AML code and can interfere with legacy drivers.
1170  * acpi_enforce_resources= can be set to:
1171  *
1172  *   - strict           (2)
1173  *     -> further driver trying to access the resources will not load
1174  *   - lax (default)    (1)
1175  *     -> further driver trying to access the resources will load, but you
1176  *     get a system message that something might go wrong...
1177  *
1178  *   - no               (0)
1179  *     -> ACPI Operation Region resources will not be registered
1180  *
1181  */
1182 #define ENFORCE_RESOURCES_STRICT 2
1183 #define ENFORCE_RESOURCES_LAX    1
1184 #define ENFORCE_RESOURCES_NO     0
1185
1186 static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_LAX;
1187
1188 static int __init acpi_enforce_resources_setup(char *str)
1189 {
1190         if (str == NULL || *str == '\0')
1191                 return 0;
1192
1193         if (!strcmp("strict", str))
1194                 acpi_enforce_resources = ENFORCE_RESOURCES_STRICT;
1195         else if (!strcmp("lax", str))
1196                 acpi_enforce_resources = ENFORCE_RESOURCES_LAX;
1197         else if (!strcmp("no", str))
1198                 acpi_enforce_resources = ENFORCE_RESOURCES_NO;
1199
1200         return 1;
1201 }
1202
1203 __setup("acpi_enforce_resources=", acpi_enforce_resources_setup);
1204
1205 /* Check for resource conflicts between ACPI OperationRegions and native
1206  * drivers */
1207 int acpi_check_resource_conflict(struct resource *res)
1208 {
1209         struct acpi_res_list *res_list_elem;
1210         int ioport;
1211         int clash = 0;
1212
1213         if (acpi_enforce_resources == ENFORCE_RESOURCES_NO)
1214                 return 0;
1215         if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM))
1216                 return 0;
1217
1218         ioport = res->flags & IORESOURCE_IO;
1219
1220         spin_lock(&acpi_res_lock);
1221         list_for_each_entry(res_list_elem, &resource_list_head,
1222                             resource_list) {
1223                 if (ioport && (res_list_elem->resource_type
1224                                != ACPI_ADR_SPACE_SYSTEM_IO))
1225                         continue;
1226                 if (!ioport && (res_list_elem->resource_type
1227                                 != ACPI_ADR_SPACE_SYSTEM_MEMORY))
1228                         continue;
1229
1230                 if (res->end < res_list_elem->start
1231                     || res_list_elem->end < res->start)
1232                         continue;
1233                 clash = 1;
1234                 break;
1235         }
1236         spin_unlock(&acpi_res_lock);
1237
1238         if (clash) {
1239                 if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) {
1240                         printk(KERN_INFO "%sACPI: %s resource %s [0x%llx-0x%llx]"
1241                                " conflicts with ACPI region %s"
1242                                " [0x%llx-0x%llx]\n",
1243                                acpi_enforce_resources == ENFORCE_RESOURCES_LAX
1244                                ? KERN_WARNING : KERN_ERR,
1245                                ioport ? "I/O" : "Memory", res->name,
1246                                (long long) res->start, (long long) res->end,
1247                                res_list_elem->name,
1248                                (long long) res_list_elem->start,
1249                                (long long) res_list_elem->end);
1250                         printk(KERN_INFO "ACPI: Device needs an ACPI driver\n");
1251                 }
1252                 if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT)
1253                         return -EBUSY;
1254         }
1255         return 0;
1256 }
1257 EXPORT_SYMBOL(acpi_check_resource_conflict);
1258
1259 int acpi_check_region(resource_size_t start, resource_size_t n,
1260                       const char *name)
1261 {
1262         struct resource res = {
1263                 .start = start,
1264                 .end   = start + n - 1,
1265                 .name  = name,
1266                 .flags = IORESOURCE_IO,
1267         };
1268
1269         return acpi_check_resource_conflict(&res);
1270 }
1271 EXPORT_SYMBOL(acpi_check_region);
1272
1273 int acpi_check_mem_region(resource_size_t start, resource_size_t n,
1274                       const char *name)
1275 {
1276         struct resource res = {
1277                 .start = start,
1278                 .end   = start + n - 1,
1279                 .name  = name,
1280                 .flags = IORESOURCE_MEM,
1281         };
1282
1283         return acpi_check_resource_conflict(&res);
1284
1285 }
1286 EXPORT_SYMBOL(acpi_check_mem_region);
1287
1288 /*
1289  * Acquire a spinlock.
1290  *
1291  * handle is a pointer to the spinlock_t.
1292  */
1293
1294 acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp)
1295 {
1296         acpi_cpu_flags flags;
1297         spin_lock_irqsave(lockp, flags);
1298         return flags;
1299 }
1300
1301 /*
1302  * Release a spinlock. See above.
1303  */
1304
1305 void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags)
1306 {
1307         spin_unlock_irqrestore(lockp, flags);
1308 }
1309
1310 #ifndef ACPI_USE_LOCAL_CACHE
1311
1312 /*******************************************************************************
1313  *
1314  * FUNCTION:    acpi_os_create_cache
1315  *
1316  * PARAMETERS:  name      - Ascii name for the cache
1317  *              size      - Size of each cached object
1318  *              depth     - Maximum depth of the cache (in objects) <ignored>
1319  *              cache     - Where the new cache object is returned
1320  *
1321  * RETURN:      status
1322  *
1323  * DESCRIPTION: Create a cache object
1324  *
1325  ******************************************************************************/
1326
1327 acpi_status
1328 acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache)
1329 {
1330         *cache = kmem_cache_create(name, size, 0, 0, NULL);
1331         if (*cache == NULL)
1332                 return AE_ERROR;
1333         else
1334                 return AE_OK;
1335 }
1336
1337 /*******************************************************************************
1338  *
1339  * FUNCTION:    acpi_os_purge_cache
1340  *
1341  * PARAMETERS:  Cache           - Handle to cache object
1342  *
1343  * RETURN:      Status
1344  *
1345  * DESCRIPTION: Free all objects within the requested cache.
1346  *
1347  ******************************************************************************/
1348
1349 acpi_status acpi_os_purge_cache(acpi_cache_t * cache)
1350 {
1351         kmem_cache_shrink(cache);
1352         return (AE_OK);
1353 }
1354
1355 /*******************************************************************************
1356  *
1357  * FUNCTION:    acpi_os_delete_cache
1358  *
1359  * PARAMETERS:  Cache           - Handle to cache object
1360  *
1361  * RETURN:      Status
1362  *
1363  * DESCRIPTION: Free all objects within the requested cache and delete the
1364  *              cache object.
1365  *
1366  ******************************************************************************/
1367
1368 acpi_status acpi_os_delete_cache(acpi_cache_t * cache)
1369 {
1370         kmem_cache_destroy(cache);
1371         return (AE_OK);
1372 }
1373
1374 /*******************************************************************************
1375  *
1376  * FUNCTION:    acpi_os_release_object
1377  *
1378  * PARAMETERS:  Cache       - Handle to cache object
1379  *              Object      - The object to be released
1380  *
1381  * RETURN:      None
1382  *
1383  * DESCRIPTION: Release an object to the specified cache.  If cache is full,
1384  *              the object is deleted.
1385  *
1386  ******************************************************************************/
1387
1388 acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object)
1389 {
1390         kmem_cache_free(cache, object);
1391         return (AE_OK);
1392 }
1393
1394 /**
1395  *      acpi_dmi_dump - dump DMI slots needed for blacklist entry
1396  *
1397  *      Returns 0 on success
1398  */
1399 static int acpi_dmi_dump(void)
1400 {
1401
1402         if (!dmi_available)
1403                 return -1;
1404
1405         printk(KERN_NOTICE PREFIX "DMI System Vendor: %s\n",
1406                 dmi_get_system_info(DMI_SYS_VENDOR));
1407         printk(KERN_NOTICE PREFIX "DMI Product Name: %s\n",
1408                 dmi_get_system_info(DMI_PRODUCT_NAME));
1409         printk(KERN_NOTICE PREFIX "DMI Product Version: %s\n",
1410                 dmi_get_system_info(DMI_PRODUCT_VERSION));
1411         printk(KERN_NOTICE PREFIX "DMI Board Name: %s\n",
1412                 dmi_get_system_info(DMI_BOARD_NAME));
1413         printk(KERN_NOTICE PREFIX "DMI BIOS Vendor: %s\n",
1414                 dmi_get_system_info(DMI_BIOS_VENDOR));
1415         printk(KERN_NOTICE PREFIX "DMI BIOS Date: %s\n",
1416                 dmi_get_system_info(DMI_BIOS_DATE));
1417
1418         return 0;
1419 }
1420
1421
1422 /******************************************************************************
1423  *
1424  * FUNCTION:    acpi_os_validate_interface
1425  *
1426  * PARAMETERS:  interface           - Requested interface to be validated
1427  *
1428  * RETURN:      AE_OK if interface is supported, AE_SUPPORT otherwise
1429  *
1430  * DESCRIPTION: Match an interface string to the interfaces supported by the
1431  *              host. Strings originate from an AML call to the _OSI method.
1432  *
1433  *****************************************************************************/
1434
1435 acpi_status
1436 acpi_os_validate_interface (char *interface)
1437 {
1438         if (!strncmp(osi_additional_string, interface, OSI_STRING_LENGTH_MAX))
1439                 return AE_OK;
1440         if (!strcmp("Linux", interface)) {
1441
1442                 printk(KERN_NOTICE PREFIX
1443                         "BIOS _OSI(Linux) query %s%s\n",
1444                         osi_linux.enable ? "honored" : "ignored",
1445                         osi_linux.cmdline ? " via cmdline" :
1446                         osi_linux.dmi ? " via DMI" : "");
1447
1448                 if (!osi_linux.dmi) {
1449                         if (acpi_dmi_dump())
1450                                 printk(KERN_NOTICE PREFIX
1451                                         "[please extract dmidecode output]\n");
1452                         printk(KERN_NOTICE PREFIX
1453                                 "Please send DMI info above to "
1454                                 "linux-acpi@vger.kernel.org\n");
1455                 }
1456                 if (!osi_linux.known && !osi_linux.cmdline) {
1457                         printk(KERN_NOTICE PREFIX
1458                                 "If \"acpi_osi=%sLinux\" works better, "
1459                                 "please notify linux-acpi@vger.kernel.org\n",
1460                                 osi_linux.enable ? "!" : "");
1461                 }
1462
1463                 if (osi_linux.enable)
1464                         return AE_OK;
1465         }
1466         return AE_SUPPORT;
1467 }
1468
1469 /******************************************************************************
1470  *
1471  * FUNCTION:    acpi_os_validate_address
1472  *
1473  * PARAMETERS:  space_id             - ACPI space ID
1474  *              address             - Physical address
1475  *              length              - Address length
1476  *
1477  * RETURN:      AE_OK if address/length is valid for the space_id. Otherwise,
1478  *              should return AE_AML_ILLEGAL_ADDRESS.
1479  *
1480  * DESCRIPTION: Validate a system address via the host OS. Used to validate
1481  *              the addresses accessed by AML operation regions.
1482  *
1483  *****************************************************************************/
1484
1485 acpi_status
1486 acpi_os_validate_address (
1487     u8                   space_id,
1488     acpi_physical_address   address,
1489     acpi_size               length,
1490     char *name)
1491 {
1492         struct acpi_res_list *res;
1493         if (acpi_enforce_resources == ENFORCE_RESOURCES_NO)
1494                 return AE_OK;
1495
1496         switch (space_id) {
1497         case ACPI_ADR_SPACE_SYSTEM_IO:
1498         case ACPI_ADR_SPACE_SYSTEM_MEMORY:
1499                 /* Only interference checks against SystemIO and SytemMemory
1500                    are needed */
1501                 res = kzalloc(sizeof(struct acpi_res_list), GFP_KERNEL);
1502                 if (!res)
1503                         return AE_OK;
1504                 /* ACPI names are fixed to 4 bytes, still better use strlcpy */
1505                 strlcpy(res->name, name, 5);
1506                 res->start = address;
1507                 res->end = address + length - 1;
1508                 res->resource_type = space_id;
1509                 spin_lock(&acpi_res_lock);
1510                 list_add(&res->resource_list, &resource_list_head);
1511                 spin_unlock(&acpi_res_lock);
1512                 pr_debug("Added %s resource: start: 0x%llx, end: 0x%llx, "
1513                          "name: %s\n", (space_id == ACPI_ADR_SPACE_SYSTEM_IO)
1514                          ? "SystemIO" : "System Memory",
1515                          (unsigned long long)res->start,
1516                          (unsigned long long)res->end,
1517                          res->name);
1518                 break;
1519         case ACPI_ADR_SPACE_PCI_CONFIG:
1520         case ACPI_ADR_SPACE_EC:
1521         case ACPI_ADR_SPACE_SMBUS:
1522         case ACPI_ADR_SPACE_CMOS:
1523         case ACPI_ADR_SPACE_PCI_BAR_TARGET:
1524         case ACPI_ADR_SPACE_DATA_TABLE:
1525         case ACPI_ADR_SPACE_FIXED_HARDWARE:
1526                 break;
1527         }
1528         return AE_OK;
1529 }
1530
1531 #endif