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 * Copyright (c) 2008 Intel Corporation 8 * Author: Matthew Wilcox <willy@linux.intel.com> 9 * 10 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 11 * 12 * This program is free software; you can redistribute it and/or modify 13 * it under the terms of the GNU General Public License as published by 14 * the Free Software Foundation; either version 2 of the License, or 15 * (at your option) any later version. 16 * 17 * This program is distributed in the hope that it will be useful, 18 * but WITHOUT ANY WARRANTY; without even the implied warranty of 19 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 20 * GNU General Public License for more details. 21 * 22 * You should have received a copy of the GNU General Public License 23 * along with this program; if not, write to the Free Software 24 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA 25 * 26 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 27 * 28 */ 29 30 #include <linux/module.h> 31 #include <linux/kernel.h> 32 #include <linux/slab.h> 33 #include <linux/mm.h> 34 #include <linux/pci.h> 35 #include <linux/interrupt.h> 36 #include <linux/kmod.h> 37 #include <linux/delay.h> 38 #include <linux/workqueue.h> 39 #include <linux/nmi.h> 40 #include <linux/acpi.h> 41 #include <linux/efi.h> 42 #include <linux/ioport.h> 43 #include <linux/list.h> 44 #include <linux/jiffies.h> 45 #include <linux/semaphore.h> 46 47 #include <asm/io.h> 48 #include <asm/uaccess.h> 49 50 #include <acpi/acpi.h> 51 #include <acpi/acpi_bus.h> 52 #include <acpi/processor.h> 53 54 #define _COMPONENT ACPI_OS_SERVICES 55 ACPI_MODULE_NAME("osl"); 56 #define PREFIX "ACPI: " 57 struct acpi_os_dpc { 58 acpi_osd_exec_callback function; 59 void *context; 60 struct work_struct work; 61 int wait; 62 }; 63 64 #ifdef CONFIG_ACPI_CUSTOM_DSDT 65 #include CONFIG_ACPI_CUSTOM_DSDT_FILE 66 #endif 67 68 #ifdef ENABLE_DEBUGGER 69 #include <linux/kdb.h> 70 71 /* stuff for debugger support */ 72 int acpi_in_debugger; 73 EXPORT_SYMBOL(acpi_in_debugger); 74 75 extern char line_buf[80]; 76 #endif /*ENABLE_DEBUGGER */ 77 78 static unsigned int acpi_irq_irq; 79 static acpi_osd_handler acpi_irq_handler; 80 static void *acpi_irq_context; 81 static struct workqueue_struct *kacpid_wq; 82 static struct workqueue_struct *kacpi_notify_wq; 83 static struct workqueue_struct *kacpi_hotplug_wq; 84 85 struct acpi_res_list { 86 resource_size_t start; 87 resource_size_t end; 88 acpi_adr_space_type resource_type; /* IO port, System memory, ...*/ 89 char name[5]; /* only can have a length of 4 chars, make use of this 90 one instead of res->name, no need to kalloc then */ 91 struct list_head resource_list; 92 int count; 93 }; 94 95 static LIST_HEAD(resource_list_head); 96 static DEFINE_SPINLOCK(acpi_res_lock); 97 98 /* 99 * This list of permanent mappings is for memory that may be accessed from 100 * interrupt context, where we can't do the ioremap(). 101 */ 102 struct acpi_ioremap { 103 struct list_head list; 104 void __iomem *virt; 105 acpi_physical_address phys; 106 acpi_size size; 107 struct kref ref; 108 }; 109 110 static LIST_HEAD(acpi_ioremaps); 111 static DEFINE_SPINLOCK(acpi_ioremap_lock); 112 113 static void __init acpi_osi_setup_late(void); 114 115 /* 116 * The story of _OSI(Linux) 117 * 118 * From pre-history through Linux-2.6.22, 119 * Linux responded TRUE upon a BIOS OSI(Linux) query. 120 * 121 * Unfortunately, reference BIOS writers got wind of this 122 * and put OSI(Linux) in their example code, quickly exposing 123 * this string as ill-conceived and opening the door to 124 * an un-bounded number of BIOS incompatibilities. 125 * 126 * For example, OSI(Linux) was used on resume to re-POST a 127 * video card on one system, because Linux at that time 128 * could not do a speedy restore in its native driver. 129 * But then upon gaining quick native restore capability, 130 * Linux has no way to tell the BIOS to skip the time-consuming 131 * POST -- putting Linux at a permanent performance disadvantage. 132 * On another system, the BIOS writer used OSI(Linux) 133 * to infer native OS support for IPMI! On other systems, 134 * OSI(Linux) simply got in the way of Linux claiming to 135 * be compatible with other operating systems, exposing 136 * BIOS issues such as skipped device initialization. 137 * 138 * So "Linux" turned out to be a really poor chose of 139 * OSI string, and from Linux-2.6.23 onward we respond FALSE. 140 * 141 * BIOS writers should NOT query _OSI(Linux) on future systems. 142 * Linux will complain on the console when it sees it, and return FALSE. 143 * To get Linux to return TRUE for your system will require 144 * a kernel source update to add a DMI entry, 145 * or boot with "acpi_osi=Linux" 146 */ 147 148 static struct osi_linux { 149 unsigned int enable:1; 150 unsigned int dmi:1; 151 unsigned int cmdline:1; 152 } osi_linux = {0, 0, 0}; 153 154 static u32 acpi_osi_handler(acpi_string interface, u32 supported) 155 { 156 if (!strcmp("Linux", interface)) { 157 158 printk(KERN_NOTICE FW_BUG PREFIX 159 "BIOS _OSI(Linux) query %s%s\n", 160 osi_linux.enable ? "honored" : "ignored", 161 osi_linux.cmdline ? " via cmdline" : 162 osi_linux.dmi ? " via DMI" : ""); 163 } 164 165 return supported; 166 } 167 168 static void __init acpi_request_region (struct acpi_generic_address *addr, 169 unsigned int length, char *desc) 170 { 171 if (!addr->address || !length) 172 return; 173 174 /* Resources are never freed */ 175 if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_IO) 176 request_region(addr->address, length, desc); 177 else if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) 178 request_mem_region(addr->address, length, desc); 179 } 180 181 static int __init acpi_reserve_resources(void) 182 { 183 acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length, 184 "ACPI PM1a_EVT_BLK"); 185 186 acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length, 187 "ACPI PM1b_EVT_BLK"); 188 189 acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length, 190 "ACPI PM1a_CNT_BLK"); 191 192 acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length, 193 "ACPI PM1b_CNT_BLK"); 194 195 if (acpi_gbl_FADT.pm_timer_length == 4) 196 acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR"); 197 198 acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length, 199 "ACPI PM2_CNT_BLK"); 200 201 /* Length of GPE blocks must be a non-negative multiple of 2 */ 202 203 if (!(acpi_gbl_FADT.gpe0_block_length & 0x1)) 204 acpi_request_region(&acpi_gbl_FADT.xgpe0_block, 205 acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK"); 206 207 if (!(acpi_gbl_FADT.gpe1_block_length & 0x1)) 208 acpi_request_region(&acpi_gbl_FADT.xgpe1_block, 209 acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK"); 210 211 return 0; 212 } 213 device_initcall(acpi_reserve_resources); 214 215 void acpi_os_printf(const char *fmt, ...) 216 { 217 va_list args; 218 va_start(args, fmt); 219 acpi_os_vprintf(fmt, args); 220 va_end(args); 221 } 222 223 void acpi_os_vprintf(const char *fmt, va_list args) 224 { 225 static char buffer[512]; 226 227 vsprintf(buffer, fmt, args); 228 229 #ifdef ENABLE_DEBUGGER 230 if (acpi_in_debugger) { 231 kdb_printf("%s", buffer); 232 } else { 233 printk(KERN_CONT "%s", buffer); 234 } 235 #else 236 printk(KERN_CONT "%s", buffer); 237 #endif 238 } 239 240 acpi_physical_address __init acpi_os_get_root_pointer(void) 241 { 242 if (efi_enabled) { 243 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) 244 return efi.acpi20; 245 else if (efi.acpi != EFI_INVALID_TABLE_ADDR) 246 return efi.acpi; 247 else { 248 printk(KERN_ERR PREFIX 249 "System description tables not found\n"); 250 return 0; 251 } 252 } else { 253 acpi_physical_address pa = 0; 254 255 acpi_find_root_pointer(&pa); 256 return pa; 257 } 258 } 259 260 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ 261 static struct acpi_ioremap * 262 acpi_map_lookup(acpi_physical_address phys, acpi_size size) 263 { 264 struct acpi_ioremap *map; 265 266 list_for_each_entry_rcu(map, &acpi_ioremaps, list) 267 if (map->phys <= phys && 268 phys + size <= map->phys + map->size) 269 return map; 270 271 return NULL; 272 } 273 274 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ 275 static void __iomem * 276 acpi_map_vaddr_lookup(acpi_physical_address phys, unsigned int size) 277 { 278 struct acpi_ioremap *map; 279 280 map = acpi_map_lookup(phys, size); 281 if (map) 282 return map->virt + (phys - map->phys); 283 284 return NULL; 285 } 286 287 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ 288 static struct acpi_ioremap * 289 acpi_map_lookup_virt(void __iomem *virt, acpi_size size) 290 { 291 struct acpi_ioremap *map; 292 293 list_for_each_entry_rcu(map, &acpi_ioremaps, list) 294 if (map->virt <= virt && 295 virt + size <= map->virt + map->size) 296 return map; 297 298 return NULL; 299 } 300 301 void __iomem *__init_refok 302 acpi_os_map_memory(acpi_physical_address phys, acpi_size size) 303 { 304 struct acpi_ioremap *map, *tmp_map; 305 unsigned long flags, pg_sz; 306 void __iomem *virt; 307 phys_addr_t pg_off; 308 309 if (phys > ULONG_MAX) { 310 printk(KERN_ERR PREFIX "Cannot map memory that high\n"); 311 return NULL; 312 } 313 314 if (!acpi_gbl_permanent_mmap) 315 return __acpi_map_table((unsigned long)phys, size); 316 317 map = kzalloc(sizeof(*map), GFP_KERNEL); 318 if (!map) 319 return NULL; 320 321 pg_off = round_down(phys, PAGE_SIZE); 322 pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off; 323 virt = ioremap(pg_off, pg_sz); 324 if (!virt) { 325 kfree(map); 326 return NULL; 327 } 328 329 INIT_LIST_HEAD(&map->list); 330 map->virt = virt; 331 map->phys = pg_off; 332 map->size = pg_sz; 333 kref_init(&map->ref); 334 335 spin_lock_irqsave(&acpi_ioremap_lock, flags); 336 /* Check if page has already been mapped. */ 337 tmp_map = acpi_map_lookup(phys, size); 338 if (tmp_map) { 339 kref_get(&tmp_map->ref); 340 spin_unlock_irqrestore(&acpi_ioremap_lock, flags); 341 iounmap(map->virt); 342 kfree(map); 343 return tmp_map->virt + (phys - tmp_map->phys); 344 } 345 list_add_tail_rcu(&map->list, &acpi_ioremaps); 346 spin_unlock_irqrestore(&acpi_ioremap_lock, flags); 347 348 return map->virt + (phys - map->phys); 349 } 350 EXPORT_SYMBOL_GPL(acpi_os_map_memory); 351 352 static void acpi_kref_del_iomap(struct kref *ref) 353 { 354 struct acpi_ioremap *map; 355 356 map = container_of(ref, struct acpi_ioremap, ref); 357 list_del_rcu(&map->list); 358 } 359 360 void __ref acpi_os_unmap_memory(void __iomem *virt, acpi_size size) 361 { 362 struct acpi_ioremap *map; 363 unsigned long flags; 364 int del; 365 366 if (!acpi_gbl_permanent_mmap) { 367 __acpi_unmap_table(virt, size); 368 return; 369 } 370 371 spin_lock_irqsave(&acpi_ioremap_lock, flags); 372 map = acpi_map_lookup_virt(virt, size); 373 if (!map) { 374 spin_unlock_irqrestore(&acpi_ioremap_lock, flags); 375 printk(KERN_ERR PREFIX "%s: bad address %p\n", __func__, virt); 376 dump_stack(); 377 return; 378 } 379 380 del = kref_put(&map->ref, acpi_kref_del_iomap); 381 spin_unlock_irqrestore(&acpi_ioremap_lock, flags); 382 383 if (!del) 384 return; 385 386 synchronize_rcu(); 387 iounmap(map->virt); 388 kfree(map); 389 } 390 EXPORT_SYMBOL_GPL(acpi_os_unmap_memory); 391 392 void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size) 393 { 394 if (!acpi_gbl_permanent_mmap) 395 __acpi_unmap_table(virt, size); 396 } 397 398 int acpi_os_map_generic_address(struct acpi_generic_address *addr) 399 { 400 void __iomem *virt; 401 402 if (addr->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) 403 return 0; 404 405 if (!addr->address || !addr->bit_width) 406 return -EINVAL; 407 408 virt = acpi_os_map_memory(addr->address, addr->bit_width / 8); 409 if (!virt) 410 return -EIO; 411 412 return 0; 413 } 414 EXPORT_SYMBOL_GPL(acpi_os_map_generic_address); 415 416 void acpi_os_unmap_generic_address(struct acpi_generic_address *addr) 417 { 418 void __iomem *virt; 419 unsigned long flags; 420 acpi_size size = addr->bit_width / 8; 421 422 if (addr->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) 423 return; 424 425 if (!addr->address || !addr->bit_width) 426 return; 427 428 spin_lock_irqsave(&acpi_ioremap_lock, flags); 429 virt = acpi_map_vaddr_lookup(addr->address, size); 430 spin_unlock_irqrestore(&acpi_ioremap_lock, flags); 431 432 acpi_os_unmap_memory(virt, size); 433 } 434 EXPORT_SYMBOL_GPL(acpi_os_unmap_generic_address); 435 436 #ifdef ACPI_FUTURE_USAGE 437 acpi_status 438 acpi_os_get_physical_address(void *virt, acpi_physical_address * phys) 439 { 440 if (!phys || !virt) 441 return AE_BAD_PARAMETER; 442 443 *phys = virt_to_phys(virt); 444 445 return AE_OK; 446 } 447 #endif 448 449 #define ACPI_MAX_OVERRIDE_LEN 100 450 451 static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN]; 452 453 acpi_status 454 acpi_os_predefined_override(const struct acpi_predefined_names *init_val, 455 acpi_string * new_val) 456 { 457 if (!init_val || !new_val) 458 return AE_BAD_PARAMETER; 459 460 *new_val = NULL; 461 if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) { 462 printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n", 463 acpi_os_name); 464 *new_val = acpi_os_name; 465 } 466 467 return AE_OK; 468 } 469 470 acpi_status 471 acpi_os_table_override(struct acpi_table_header * existing_table, 472 struct acpi_table_header ** new_table) 473 { 474 if (!existing_table || !new_table) 475 return AE_BAD_PARAMETER; 476 477 *new_table = NULL; 478 479 #ifdef CONFIG_ACPI_CUSTOM_DSDT 480 if (strncmp(existing_table->signature, "DSDT", 4) == 0) 481 *new_table = (struct acpi_table_header *)AmlCode; 482 #endif 483 if (*new_table != NULL) { 484 printk(KERN_WARNING PREFIX "Override [%4.4s-%8.8s], " 485 "this is unsafe: tainting kernel\n", 486 existing_table->signature, 487 existing_table->oem_table_id); 488 add_taint(TAINT_OVERRIDDEN_ACPI_TABLE); 489 } 490 return AE_OK; 491 } 492 493 static irqreturn_t acpi_irq(int irq, void *dev_id) 494 { 495 u32 handled; 496 497 handled = (*acpi_irq_handler) (acpi_irq_context); 498 499 if (handled) { 500 acpi_irq_handled++; 501 return IRQ_HANDLED; 502 } else { 503 acpi_irq_not_handled++; 504 return IRQ_NONE; 505 } 506 } 507 508 acpi_status 509 acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler, 510 void *context) 511 { 512 unsigned int irq; 513 514 acpi_irq_stats_init(); 515 516 /* 517 * Ignore the GSI from the core, and use the value in our copy of the 518 * FADT. It may not be the same if an interrupt source override exists 519 * for the SCI. 520 */ 521 gsi = acpi_gbl_FADT.sci_interrupt; 522 if (acpi_gsi_to_irq(gsi, &irq) < 0) { 523 printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n", 524 gsi); 525 return AE_OK; 526 } 527 528 acpi_irq_handler = handler; 529 acpi_irq_context = context; 530 if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) { 531 printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq); 532 return AE_NOT_ACQUIRED; 533 } 534 acpi_irq_irq = irq; 535 536 return AE_OK; 537 } 538 539 acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler) 540 { 541 if (irq) { 542 free_irq(irq, acpi_irq); 543 acpi_irq_handler = NULL; 544 acpi_irq_irq = 0; 545 } 546 547 return AE_OK; 548 } 549 550 /* 551 * Running in interpreter thread context, safe to sleep 552 */ 553 554 void acpi_os_sleep(u64 ms) 555 { 556 schedule_timeout_interruptible(msecs_to_jiffies(ms)); 557 } 558 559 void acpi_os_stall(u32 us) 560 { 561 while (us) { 562 u32 delay = 1000; 563 564 if (delay > us) 565 delay = us; 566 udelay(delay); 567 touch_nmi_watchdog(); 568 us -= delay; 569 } 570 } 571 572 /* 573 * Support ACPI 3.0 AML Timer operand 574 * Returns 64-bit free-running, monotonically increasing timer 575 * with 100ns granularity 576 */ 577 u64 acpi_os_get_timer(void) 578 { 579 static u64 t; 580 581 #ifdef CONFIG_HPET 582 /* TBD: use HPET if available */ 583 #endif 584 585 #ifdef CONFIG_X86_PM_TIMER 586 /* TBD: default to PM timer if HPET was not available */ 587 #endif 588 if (!t) 589 printk(KERN_ERR PREFIX "acpi_os_get_timer() TBD\n"); 590 591 return ++t; 592 } 593 594 acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width) 595 { 596 u32 dummy; 597 598 if (!value) 599 value = &dummy; 600 601 *value = 0; 602 if (width <= 8) { 603 *(u8 *) value = inb(port); 604 } else if (width <= 16) { 605 *(u16 *) value = inw(port); 606 } else if (width <= 32) { 607 *(u32 *) value = inl(port); 608 } else { 609 BUG(); 610 } 611 612 return AE_OK; 613 } 614 615 EXPORT_SYMBOL(acpi_os_read_port); 616 617 acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width) 618 { 619 if (width <= 8) { 620 outb(value, port); 621 } else if (width <= 16) { 622 outw(value, port); 623 } else if (width <= 32) { 624 outl(value, port); 625 } else { 626 BUG(); 627 } 628 629 return AE_OK; 630 } 631 632 EXPORT_SYMBOL(acpi_os_write_port); 633 634 acpi_status 635 acpi_os_read_memory(acpi_physical_address phys_addr, u32 * value, u32 width) 636 { 637 u32 dummy; 638 void __iomem *virt_addr; 639 int size = width / 8, unmap = 0; 640 641 rcu_read_lock(); 642 virt_addr = acpi_map_vaddr_lookup(phys_addr, size); 643 rcu_read_unlock(); 644 if (!virt_addr) { 645 virt_addr = ioremap(phys_addr, size); 646 unmap = 1; 647 } 648 if (!value) 649 value = &dummy; 650 651 switch (width) { 652 case 8: 653 *(u8 *) value = readb(virt_addr); 654 break; 655 case 16: 656 *(u16 *) value = readw(virt_addr); 657 break; 658 case 32: 659 *(u32 *) value = readl(virt_addr); 660 break; 661 default: 662 BUG(); 663 } 664 665 if (unmap) 666 iounmap(virt_addr); 667 668 return AE_OK; 669 } 670 671 acpi_status 672 acpi_os_write_memory(acpi_physical_address phys_addr, u32 value, u32 width) 673 { 674 void __iomem *virt_addr; 675 int size = width / 8, unmap = 0; 676 677 rcu_read_lock(); 678 virt_addr = acpi_map_vaddr_lookup(phys_addr, size); 679 rcu_read_unlock(); 680 if (!virt_addr) { 681 virt_addr = ioremap(phys_addr, size); 682 unmap = 1; 683 } 684 685 switch (width) { 686 case 8: 687 writeb(value, virt_addr); 688 break; 689 case 16: 690 writew(value, virt_addr); 691 break; 692 case 32: 693 writel(value, virt_addr); 694 break; 695 default: 696 BUG(); 697 } 698 699 if (unmap) 700 iounmap(virt_addr); 701 702 return AE_OK; 703 } 704 705 acpi_status 706 acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, 707 u64 *value, u32 width) 708 { 709 int result, size; 710 u32 value32; 711 712 if (!value) 713 return AE_BAD_PARAMETER; 714 715 switch (width) { 716 case 8: 717 size = 1; 718 break; 719 case 16: 720 size = 2; 721 break; 722 case 32: 723 size = 4; 724 break; 725 default: 726 return AE_ERROR; 727 } 728 729 result = raw_pci_read(pci_id->segment, pci_id->bus, 730 PCI_DEVFN(pci_id->device, pci_id->function), 731 reg, size, &value32); 732 *value = value32; 733 734 return (result ? AE_ERROR : AE_OK); 735 } 736 737 acpi_status 738 acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, 739 u64 value, u32 width) 740 { 741 int result, size; 742 743 switch (width) { 744 case 8: 745 size = 1; 746 break; 747 case 16: 748 size = 2; 749 break; 750 case 32: 751 size = 4; 752 break; 753 default: 754 return AE_ERROR; 755 } 756 757 result = raw_pci_write(pci_id->segment, pci_id->bus, 758 PCI_DEVFN(pci_id->device, pci_id->function), 759 reg, size, value); 760 761 return (result ? AE_ERROR : AE_OK); 762 } 763 764 static void acpi_os_execute_deferred(struct work_struct *work) 765 { 766 struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work); 767 768 if (dpc->wait) 769 acpi_os_wait_events_complete(NULL); 770 771 dpc->function(dpc->context); 772 kfree(dpc); 773 } 774 775 /******************************************************************************* 776 * 777 * FUNCTION: acpi_os_execute 778 * 779 * PARAMETERS: Type - Type of the callback 780 * Function - Function to be executed 781 * Context - Function parameters 782 * 783 * RETURN: Status 784 * 785 * DESCRIPTION: Depending on type, either queues function for deferred execution or 786 * immediately executes function on a separate thread. 787 * 788 ******************************************************************************/ 789 790 static acpi_status __acpi_os_execute(acpi_execute_type type, 791 acpi_osd_exec_callback function, void *context, int hp) 792 { 793 acpi_status status = AE_OK; 794 struct acpi_os_dpc *dpc; 795 struct workqueue_struct *queue; 796 int ret; 797 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 798 "Scheduling function [%p(%p)] for deferred execution.\n", 799 function, context)); 800 801 /* 802 * Allocate/initialize DPC structure. Note that this memory will be 803 * freed by the callee. The kernel handles the work_struct list in a 804 * way that allows us to also free its memory inside the callee. 805 * Because we may want to schedule several tasks with different 806 * parameters we can't use the approach some kernel code uses of 807 * having a static work_struct. 808 */ 809 810 dpc = kmalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC); 811 if (!dpc) 812 return AE_NO_MEMORY; 813 814 dpc->function = function; 815 dpc->context = context; 816 817 /* 818 * We can't run hotplug code in keventd_wq/kacpid_wq/kacpid_notify_wq 819 * because the hotplug code may call driver .remove() functions, 820 * which invoke flush_scheduled_work/acpi_os_wait_events_complete 821 * to flush these workqueues. 822 */ 823 queue = hp ? kacpi_hotplug_wq : 824 (type == OSL_NOTIFY_HANDLER ? kacpi_notify_wq : kacpid_wq); 825 dpc->wait = hp ? 1 : 0; 826 827 if (queue == kacpi_hotplug_wq) 828 INIT_WORK(&dpc->work, acpi_os_execute_deferred); 829 else if (queue == kacpi_notify_wq) 830 INIT_WORK(&dpc->work, acpi_os_execute_deferred); 831 else 832 INIT_WORK(&dpc->work, acpi_os_execute_deferred); 833 834 /* 835 * On some machines, a software-initiated SMI causes corruption unless 836 * the SMI runs on CPU 0. An SMI can be initiated by any AML, but 837 * typically it's done in GPE-related methods that are run via 838 * workqueues, so we can avoid the known corruption cases by always 839 * queueing on CPU 0. 840 */ 841 ret = queue_work_on(0, queue, &dpc->work); 842 843 if (!ret) { 844 printk(KERN_ERR PREFIX 845 "Call to queue_work() failed.\n"); 846 status = AE_ERROR; 847 kfree(dpc); 848 } 849 return status; 850 } 851 852 acpi_status acpi_os_execute(acpi_execute_type type, 853 acpi_osd_exec_callback function, void *context) 854 { 855 return __acpi_os_execute(type, function, context, 0); 856 } 857 EXPORT_SYMBOL(acpi_os_execute); 858 859 acpi_status acpi_os_hotplug_execute(acpi_osd_exec_callback function, 860 void *context) 861 { 862 return __acpi_os_execute(0, function, context, 1); 863 } 864 865 void acpi_os_wait_events_complete(void *context) 866 { 867 flush_workqueue(kacpid_wq); 868 flush_workqueue(kacpi_notify_wq); 869 } 870 871 EXPORT_SYMBOL(acpi_os_wait_events_complete); 872 873 /* 874 * Deallocate the memory for a spinlock. 875 */ 876 void acpi_os_delete_lock(acpi_spinlock handle) 877 { 878 return; 879 } 880 881 acpi_status 882 acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle) 883 { 884 struct semaphore *sem = NULL; 885 886 sem = acpi_os_allocate(sizeof(struct semaphore)); 887 if (!sem) 888 return AE_NO_MEMORY; 889 memset(sem, 0, sizeof(struct semaphore)); 890 891 sema_init(sem, initial_units); 892 893 *handle = (acpi_handle *) sem; 894 895 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n", 896 *handle, initial_units)); 897 898 return AE_OK; 899 } 900 901 /* 902 * TODO: A better way to delete semaphores? Linux doesn't have a 903 * 'delete_semaphore()' function -- may result in an invalid 904 * pointer dereference for non-synchronized consumers. Should 905 * we at least check for blocked threads and signal/cancel them? 906 */ 907 908 acpi_status acpi_os_delete_semaphore(acpi_handle handle) 909 { 910 struct semaphore *sem = (struct semaphore *)handle; 911 912 if (!sem) 913 return AE_BAD_PARAMETER; 914 915 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle)); 916 917 BUG_ON(!list_empty(&sem->wait_list)); 918 kfree(sem); 919 sem = NULL; 920 921 return AE_OK; 922 } 923 924 /* 925 * TODO: Support for units > 1? 926 */ 927 acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout) 928 { 929 acpi_status status = AE_OK; 930 struct semaphore *sem = (struct semaphore *)handle; 931 long jiffies; 932 int ret = 0; 933 934 if (!sem || (units < 1)) 935 return AE_BAD_PARAMETER; 936 937 if (units > 1) 938 return AE_SUPPORT; 939 940 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n", 941 handle, units, timeout)); 942 943 if (timeout == ACPI_WAIT_FOREVER) 944 jiffies = MAX_SCHEDULE_TIMEOUT; 945 else 946 jiffies = msecs_to_jiffies(timeout); 947 948 ret = down_timeout(sem, jiffies); 949 if (ret) 950 status = AE_TIME; 951 952 if (ACPI_FAILURE(status)) { 953 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, 954 "Failed to acquire semaphore[%p|%d|%d], %s", 955 handle, units, timeout, 956 acpi_format_exception(status))); 957 } else { 958 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, 959 "Acquired semaphore[%p|%d|%d]", handle, 960 units, timeout)); 961 } 962 963 return status; 964 } 965 966 /* 967 * TODO: Support for units > 1? 968 */ 969 acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units) 970 { 971 struct semaphore *sem = (struct semaphore *)handle; 972 973 if (!sem || (units < 1)) 974 return AE_BAD_PARAMETER; 975 976 if (units > 1) 977 return AE_SUPPORT; 978 979 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle, 980 units)); 981 982 up(sem); 983 984 return AE_OK; 985 } 986 987 #ifdef ACPI_FUTURE_USAGE 988 u32 acpi_os_get_line(char *buffer) 989 { 990 991 #ifdef ENABLE_DEBUGGER 992 if (acpi_in_debugger) { 993 u32 chars; 994 995 kdb_read(buffer, sizeof(line_buf)); 996 997 /* remove the CR kdb includes */ 998 chars = strlen(buffer) - 1; 999 buffer[chars] = '\0'; 1000 } 1001 #endif 1002 1003 return 0; 1004 } 1005 #endif /* ACPI_FUTURE_USAGE */ 1006 1007 acpi_status acpi_os_signal(u32 function, void *info) 1008 { 1009 switch (function) { 1010 case ACPI_SIGNAL_FATAL: 1011 printk(KERN_ERR PREFIX "Fatal opcode executed\n"); 1012 break; 1013 case ACPI_SIGNAL_BREAKPOINT: 1014 /* 1015 * AML Breakpoint 1016 * ACPI spec. says to treat it as a NOP unless 1017 * you are debugging. So if/when we integrate 1018 * AML debugger into the kernel debugger its 1019 * hook will go here. But until then it is 1020 * not useful to print anything on breakpoints. 1021 */ 1022 break; 1023 default: 1024 break; 1025 } 1026 1027 return AE_OK; 1028 } 1029 1030 static int __init acpi_os_name_setup(char *str) 1031 { 1032 char *p = acpi_os_name; 1033 int count = ACPI_MAX_OVERRIDE_LEN - 1; 1034 1035 if (!str || !*str) 1036 return 0; 1037 1038 for (; count-- && str && *str; str++) { 1039 if (isalnum(*str) || *str == ' ' || *str == ':') 1040 *p++ = *str; 1041 else if (*str == '\'' || *str == '"') 1042 continue; 1043 else 1044 break; 1045 } 1046 *p = 0; 1047 1048 return 1; 1049 1050 } 1051 1052 __setup("acpi_os_name=", acpi_os_name_setup); 1053 1054 #define OSI_STRING_LENGTH_MAX 64 /* arbitrary */ 1055 #define OSI_STRING_ENTRIES_MAX 16 /* arbitrary */ 1056 1057 struct osi_setup_entry { 1058 char string[OSI_STRING_LENGTH_MAX]; 1059 bool enable; 1060 }; 1061 1062 static struct osi_setup_entry __initdata osi_setup_entries[OSI_STRING_ENTRIES_MAX]; 1063 1064 void __init acpi_osi_setup(char *str) 1065 { 1066 struct osi_setup_entry *osi; 1067 bool enable = true; 1068 int i; 1069 1070 if (!acpi_gbl_create_osi_method) 1071 return; 1072 1073 if (str == NULL || *str == '\0') { 1074 printk(KERN_INFO PREFIX "_OSI method disabled\n"); 1075 acpi_gbl_create_osi_method = FALSE; 1076 return; 1077 } 1078 1079 if (*str == '!') { 1080 str++; 1081 enable = false; 1082 } 1083 1084 for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { 1085 osi = &osi_setup_entries[i]; 1086 if (!strcmp(osi->string, str)) { 1087 osi->enable = enable; 1088 break; 1089 } else if (osi->string[0] == '\0') { 1090 osi->enable = enable; 1091 strncpy(osi->string, str, OSI_STRING_LENGTH_MAX); 1092 break; 1093 } 1094 } 1095 } 1096 1097 static void __init set_osi_linux(unsigned int enable) 1098 { 1099 if (osi_linux.enable != enable) 1100 osi_linux.enable = enable; 1101 1102 if (osi_linux.enable) 1103 acpi_osi_setup("Linux"); 1104 else 1105 acpi_osi_setup("!Linux"); 1106 1107 return; 1108 } 1109 1110 static void __init acpi_cmdline_osi_linux(unsigned int enable) 1111 { 1112 osi_linux.cmdline = 1; /* cmdline set the default and override DMI */ 1113 osi_linux.dmi = 0; 1114 set_osi_linux(enable); 1115 1116 return; 1117 } 1118 1119 void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d) 1120 { 1121 printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident); 1122 1123 if (enable == -1) 1124 return; 1125 1126 osi_linux.dmi = 1; /* DMI knows that this box asks OSI(Linux) */ 1127 set_osi_linux(enable); 1128 1129 return; 1130 } 1131 1132 /* 1133 * Modify the list of "OS Interfaces" reported to BIOS via _OSI 1134 * 1135 * empty string disables _OSI 1136 * string starting with '!' disables that string 1137 * otherwise string is added to list, augmenting built-in strings 1138 */ 1139 static void __init acpi_osi_setup_late(void) 1140 { 1141 struct osi_setup_entry *osi; 1142 char *str; 1143 int i; 1144 acpi_status status; 1145 1146 for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { 1147 osi = &osi_setup_entries[i]; 1148 str = osi->string; 1149 1150 if (*str == '\0') 1151 break; 1152 if (osi->enable) { 1153 status = acpi_install_interface(str); 1154 1155 if (ACPI_SUCCESS(status)) 1156 printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str); 1157 } else { 1158 status = acpi_remove_interface(str); 1159 1160 if (ACPI_SUCCESS(status)) 1161 printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str); 1162 } 1163 } 1164 } 1165 1166 static int __init osi_setup(char *str) 1167 { 1168 if (str && !strcmp("Linux", str)) 1169 acpi_cmdline_osi_linux(1); 1170 else if (str && !strcmp("!Linux", str)) 1171 acpi_cmdline_osi_linux(0); 1172 else 1173 acpi_osi_setup(str); 1174 1175 return 1; 1176 } 1177 1178 __setup("acpi_osi=", osi_setup); 1179 1180 /* enable serialization to combat AE_ALREADY_EXISTS errors */ 1181 static int __init acpi_serialize_setup(char *str) 1182 { 1183 printk(KERN_INFO PREFIX "serialize enabled\n"); 1184 1185 acpi_gbl_all_methods_serialized = TRUE; 1186 1187 return 1; 1188 } 1189 1190 __setup("acpi_serialize", acpi_serialize_setup); 1191 1192 /* Check of resource interference between native drivers and ACPI 1193 * OperationRegions (SystemIO and System Memory only). 1194 * IO ports and memory declared in ACPI might be used by the ACPI subsystem 1195 * in arbitrary AML code and can interfere with legacy drivers. 1196 * acpi_enforce_resources= can be set to: 1197 * 1198 * - strict (default) (2) 1199 * -> further driver trying to access the resources will not load 1200 * - lax (1) 1201 * -> further driver trying to access the resources will load, but you 1202 * get a system message that something might go wrong... 1203 * 1204 * - no (0) 1205 * -> ACPI Operation Region resources will not be registered 1206 * 1207 */ 1208 #define ENFORCE_RESOURCES_STRICT 2 1209 #define ENFORCE_RESOURCES_LAX 1 1210 #define ENFORCE_RESOURCES_NO 0 1211 1212 static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; 1213 1214 static int __init acpi_enforce_resources_setup(char *str) 1215 { 1216 if (str == NULL || *str == '\0') 1217 return 0; 1218 1219 if (!strcmp("strict", str)) 1220 acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; 1221 else if (!strcmp("lax", str)) 1222 acpi_enforce_resources = ENFORCE_RESOURCES_LAX; 1223 else if (!strcmp("no", str)) 1224 acpi_enforce_resources = ENFORCE_RESOURCES_NO; 1225 1226 return 1; 1227 } 1228 1229 __setup("acpi_enforce_resources=", acpi_enforce_resources_setup); 1230 1231 /* Check for resource conflicts between ACPI OperationRegions and native 1232 * drivers */ 1233 int acpi_check_resource_conflict(const struct resource *res) 1234 { 1235 struct acpi_res_list *res_list_elem; 1236 int ioport; 1237 int clash = 0; 1238 1239 if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) 1240 return 0; 1241 if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM)) 1242 return 0; 1243 1244 ioport = res->flags & IORESOURCE_IO; 1245 1246 spin_lock(&acpi_res_lock); 1247 list_for_each_entry(res_list_elem, &resource_list_head, 1248 resource_list) { 1249 if (ioport && (res_list_elem->resource_type 1250 != ACPI_ADR_SPACE_SYSTEM_IO)) 1251 continue; 1252 if (!ioport && (res_list_elem->resource_type 1253 != ACPI_ADR_SPACE_SYSTEM_MEMORY)) 1254 continue; 1255 1256 if (res->end < res_list_elem->start 1257 || res_list_elem->end < res->start) 1258 continue; 1259 clash = 1; 1260 break; 1261 } 1262 spin_unlock(&acpi_res_lock); 1263 1264 if (clash) { 1265 if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) { 1266 printk(KERN_WARNING "ACPI: resource %s %pR" 1267 " conflicts with ACPI region %s %pR\n", 1268 res->name, res, res_list_elem->name, 1269 res_list_elem); 1270 if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX) 1271 printk(KERN_NOTICE "ACPI: This conflict may" 1272 " cause random problems and system" 1273 " instability\n"); 1274 printk(KERN_INFO "ACPI: If an ACPI driver is available" 1275 " for this device, you should use it instead of" 1276 " the native driver\n"); 1277 } 1278 if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT) 1279 return -EBUSY; 1280 } 1281 return 0; 1282 } 1283 EXPORT_SYMBOL(acpi_check_resource_conflict); 1284 1285 int acpi_check_region(resource_size_t start, resource_size_t n, 1286 const char *name) 1287 { 1288 struct resource res = { 1289 .start = start, 1290 .end = start + n - 1, 1291 .name = name, 1292 .flags = IORESOURCE_IO, 1293 }; 1294 1295 return acpi_check_resource_conflict(&res); 1296 } 1297 EXPORT_SYMBOL(acpi_check_region); 1298 1299 /* 1300 * Let drivers know whether the resource checks are effective 1301 */ 1302 int acpi_resources_are_enforced(void) 1303 { 1304 return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT; 1305 } 1306 EXPORT_SYMBOL(acpi_resources_are_enforced); 1307 1308 /* 1309 * Acquire a spinlock. 1310 * 1311 * handle is a pointer to the spinlock_t. 1312 */ 1313 1314 acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp) 1315 { 1316 acpi_cpu_flags flags; 1317 spin_lock_irqsave(lockp, flags); 1318 return flags; 1319 } 1320 1321 /* 1322 * Release a spinlock. See above. 1323 */ 1324 1325 void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags) 1326 { 1327 spin_unlock_irqrestore(lockp, flags); 1328 } 1329 1330 #ifndef ACPI_USE_LOCAL_CACHE 1331 1332 /******************************************************************************* 1333 * 1334 * FUNCTION: acpi_os_create_cache 1335 * 1336 * PARAMETERS: name - Ascii name for the cache 1337 * size - Size of each cached object 1338 * depth - Maximum depth of the cache (in objects) <ignored> 1339 * cache - Where the new cache object is returned 1340 * 1341 * RETURN: status 1342 * 1343 * DESCRIPTION: Create a cache object 1344 * 1345 ******************************************************************************/ 1346 1347 acpi_status 1348 acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache) 1349 { 1350 *cache = kmem_cache_create(name, size, 0, 0, NULL); 1351 if (*cache == NULL) 1352 return AE_ERROR; 1353 else 1354 return AE_OK; 1355 } 1356 1357 /******************************************************************************* 1358 * 1359 * FUNCTION: acpi_os_purge_cache 1360 * 1361 * PARAMETERS: Cache - Handle to cache object 1362 * 1363 * RETURN: Status 1364 * 1365 * DESCRIPTION: Free all objects within the requested cache. 1366 * 1367 ******************************************************************************/ 1368 1369 acpi_status acpi_os_purge_cache(acpi_cache_t * cache) 1370 { 1371 kmem_cache_shrink(cache); 1372 return (AE_OK); 1373 } 1374 1375 /******************************************************************************* 1376 * 1377 * FUNCTION: acpi_os_delete_cache 1378 * 1379 * PARAMETERS: Cache - Handle to cache object 1380 * 1381 * RETURN: Status 1382 * 1383 * DESCRIPTION: Free all objects within the requested cache and delete the 1384 * cache object. 1385 * 1386 ******************************************************************************/ 1387 1388 acpi_status acpi_os_delete_cache(acpi_cache_t * cache) 1389 { 1390 kmem_cache_destroy(cache); 1391 return (AE_OK); 1392 } 1393 1394 /******************************************************************************* 1395 * 1396 * FUNCTION: acpi_os_release_object 1397 * 1398 * PARAMETERS: Cache - Handle to cache object 1399 * Object - The object to be released 1400 * 1401 * RETURN: None 1402 * 1403 * DESCRIPTION: Release an object to the specified cache. If cache is full, 1404 * the object is deleted. 1405 * 1406 ******************************************************************************/ 1407 1408 acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object) 1409 { 1410 kmem_cache_free(cache, object); 1411 return (AE_OK); 1412 } 1413 1414 static inline int acpi_res_list_add(struct acpi_res_list *res) 1415 { 1416 struct acpi_res_list *res_list_elem; 1417 1418 list_for_each_entry(res_list_elem, &resource_list_head, 1419 resource_list) { 1420 1421 if (res->resource_type == res_list_elem->resource_type && 1422 res->start == res_list_elem->start && 1423 res->end == res_list_elem->end) { 1424 1425 /* 1426 * The Region(addr,len) already exist in the list, 1427 * just increase the count 1428 */ 1429 1430 res_list_elem->count++; 1431 return 0; 1432 } 1433 } 1434 1435 res->count = 1; 1436 list_add(&res->resource_list, &resource_list_head); 1437 return 1; 1438 } 1439 1440 static inline void acpi_res_list_del(struct acpi_res_list *res) 1441 { 1442 struct acpi_res_list *res_list_elem; 1443 1444 list_for_each_entry(res_list_elem, &resource_list_head, 1445 resource_list) { 1446 1447 if (res->resource_type == res_list_elem->resource_type && 1448 res->start == res_list_elem->start && 1449 res->end == res_list_elem->end) { 1450 1451 /* 1452 * If the res count is decreased to 0, 1453 * remove and free it 1454 */ 1455 1456 if (--res_list_elem->count == 0) { 1457 list_del(&res_list_elem->resource_list); 1458 kfree(res_list_elem); 1459 } 1460 return; 1461 } 1462 } 1463 } 1464 1465 acpi_status 1466 acpi_os_invalidate_address( 1467 u8 space_id, 1468 acpi_physical_address address, 1469 acpi_size length) 1470 { 1471 struct acpi_res_list res; 1472 1473 switch (space_id) { 1474 case ACPI_ADR_SPACE_SYSTEM_IO: 1475 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1476 /* Only interference checks against SystemIO and SystemMemory 1477 are needed */ 1478 res.start = address; 1479 res.end = address + length - 1; 1480 res.resource_type = space_id; 1481 spin_lock(&acpi_res_lock); 1482 acpi_res_list_del(&res); 1483 spin_unlock(&acpi_res_lock); 1484 break; 1485 case ACPI_ADR_SPACE_PCI_CONFIG: 1486 case ACPI_ADR_SPACE_EC: 1487 case ACPI_ADR_SPACE_SMBUS: 1488 case ACPI_ADR_SPACE_CMOS: 1489 case ACPI_ADR_SPACE_PCI_BAR_TARGET: 1490 case ACPI_ADR_SPACE_DATA_TABLE: 1491 case ACPI_ADR_SPACE_FIXED_HARDWARE: 1492 break; 1493 } 1494 return AE_OK; 1495 } 1496 1497 /****************************************************************************** 1498 * 1499 * FUNCTION: acpi_os_validate_address 1500 * 1501 * PARAMETERS: space_id - ACPI space ID 1502 * address - Physical address 1503 * length - Address length 1504 * 1505 * RETURN: AE_OK if address/length is valid for the space_id. Otherwise, 1506 * should return AE_AML_ILLEGAL_ADDRESS. 1507 * 1508 * DESCRIPTION: Validate a system address via the host OS. Used to validate 1509 * the addresses accessed by AML operation regions. 1510 * 1511 *****************************************************************************/ 1512 1513 acpi_status 1514 acpi_os_validate_address ( 1515 u8 space_id, 1516 acpi_physical_address address, 1517 acpi_size length, 1518 char *name) 1519 { 1520 struct acpi_res_list *res; 1521 int added; 1522 if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) 1523 return AE_OK; 1524 1525 switch (space_id) { 1526 case ACPI_ADR_SPACE_SYSTEM_IO: 1527 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1528 /* Only interference checks against SystemIO and SystemMemory 1529 are needed */ 1530 res = kzalloc(sizeof(struct acpi_res_list), GFP_KERNEL); 1531 if (!res) 1532 return AE_OK; 1533 /* ACPI names are fixed to 4 bytes, still better use strlcpy */ 1534 strlcpy(res->name, name, 5); 1535 res->start = address; 1536 res->end = address + length - 1; 1537 res->resource_type = space_id; 1538 spin_lock(&acpi_res_lock); 1539 added = acpi_res_list_add(res); 1540 spin_unlock(&acpi_res_lock); 1541 pr_debug("%s %s resource: start: 0x%llx, end: 0x%llx, " 1542 "name: %s\n", added ? "Added" : "Already exist", 1543 (space_id == ACPI_ADR_SPACE_SYSTEM_IO) 1544 ? "SystemIO" : "System Memory", 1545 (unsigned long long)res->start, 1546 (unsigned long long)res->end, 1547 res->name); 1548 if (!added) 1549 kfree(res); 1550 break; 1551 case ACPI_ADR_SPACE_PCI_CONFIG: 1552 case ACPI_ADR_SPACE_EC: 1553 case ACPI_ADR_SPACE_SMBUS: 1554 case ACPI_ADR_SPACE_CMOS: 1555 case ACPI_ADR_SPACE_PCI_BAR_TARGET: 1556 case ACPI_ADR_SPACE_DATA_TABLE: 1557 case ACPI_ADR_SPACE_FIXED_HARDWARE: 1558 break; 1559 } 1560 return AE_OK; 1561 } 1562 #endif 1563 1564 acpi_status __init acpi_os_initialize(void) 1565 { 1566 acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block); 1567 acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block); 1568 acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block); 1569 acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block); 1570 1571 return AE_OK; 1572 } 1573 1574 acpi_status __init acpi_os_initialize1(void) 1575 { 1576 kacpid_wq = create_workqueue("kacpid"); 1577 kacpi_notify_wq = create_workqueue("kacpi_notify"); 1578 kacpi_hotplug_wq = create_workqueue("kacpi_hotplug"); 1579 BUG_ON(!kacpid_wq); 1580 BUG_ON(!kacpi_notify_wq); 1581 BUG_ON(!kacpi_hotplug_wq); 1582 acpi_install_interface_handler(acpi_osi_handler); 1583 acpi_osi_setup_late(); 1584 return AE_OK; 1585 } 1586 1587 acpi_status acpi_os_terminate(void) 1588 { 1589 if (acpi_irq_handler) { 1590 acpi_os_remove_interrupt_handler(acpi_irq_irq, 1591 acpi_irq_handler); 1592 } 1593 1594 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe1_block); 1595 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block); 1596 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block); 1597 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block); 1598 1599 destroy_workqueue(kacpid_wq); 1600 destroy_workqueue(kacpi_notify_wq); 1601 destroy_workqueue(kacpi_hotplug_wq); 1602 1603 return AE_OK; 1604 } 1605