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/acpi_io.h> 42 #include <linux/efi.h> 43 #include <linux/ioport.h> 44 #include <linux/list.h> 45 #include <linux/jiffies.h> 46 #include <linux/semaphore.h> 47 48 #include <asm/io.h> 49 #include <asm/uaccess.h> 50 51 #include <acpi/acpi.h> 52 #include <acpi/acpi_bus.h> 53 #include <acpi/processor.h> 54 55 #define _COMPONENT ACPI_OS_SERVICES 56 ACPI_MODULE_NAME("osl"); 57 #define PREFIX "ACPI: " 58 struct acpi_os_dpc { 59 acpi_osd_exec_callback function; 60 void *context; 61 struct work_struct work; 62 int wait; 63 }; 64 65 #ifdef CONFIG_ACPI_CUSTOM_DSDT 66 #include CONFIG_ACPI_CUSTOM_DSDT_FILE 67 #endif 68 69 #ifdef ENABLE_DEBUGGER 70 #include <linux/kdb.h> 71 72 /* stuff for debugger support */ 73 int acpi_in_debugger; 74 EXPORT_SYMBOL(acpi_in_debugger); 75 76 extern char line_buf[80]; 77 #endif /*ENABLE_DEBUGGER */ 78 79 static unsigned int acpi_irq_irq; 80 static acpi_osd_handler acpi_irq_handler; 81 static void *acpi_irq_context; 82 static struct workqueue_struct *kacpid_wq; 83 static struct workqueue_struct *kacpi_notify_wq; 84 static struct workqueue_struct *kacpi_hotplug_wq; 85 86 struct acpi_res_list { 87 resource_size_t start; 88 resource_size_t end; 89 acpi_adr_space_type resource_type; /* IO port, System memory, ...*/ 90 char name[5]; /* only can have a length of 4 chars, make use of this 91 one instead of res->name, no need to kalloc then */ 92 struct list_head resource_list; 93 int count; 94 }; 95 96 static LIST_HEAD(resource_list_head); 97 static DEFINE_SPINLOCK(acpi_res_lock); 98 99 /* 100 * This list of permanent mappings is for memory that may be accessed from 101 * interrupt context, where we can't do the ioremap(). 102 */ 103 struct acpi_ioremap { 104 struct list_head list; 105 void __iomem *virt; 106 acpi_physical_address phys; 107 acpi_size size; 108 struct kref ref; 109 }; 110 111 static LIST_HEAD(acpi_ioremaps); 112 static DEFINE_SPINLOCK(acpi_ioremap_lock); 113 114 static void __init acpi_osi_setup_late(void); 115 116 /* 117 * The story of _OSI(Linux) 118 * 119 * From pre-history through Linux-2.6.22, 120 * Linux responded TRUE upon a BIOS OSI(Linux) query. 121 * 122 * Unfortunately, reference BIOS writers got wind of this 123 * and put OSI(Linux) in their example code, quickly exposing 124 * this string as ill-conceived and opening the door to 125 * an un-bounded number of BIOS incompatibilities. 126 * 127 * For example, OSI(Linux) was used on resume to re-POST a 128 * video card on one system, because Linux at that time 129 * could not do a speedy restore in its native driver. 130 * But then upon gaining quick native restore capability, 131 * Linux has no way to tell the BIOS to skip the time-consuming 132 * POST -- putting Linux at a permanent performance disadvantage. 133 * On another system, the BIOS writer used OSI(Linux) 134 * to infer native OS support for IPMI! On other systems, 135 * OSI(Linux) simply got in the way of Linux claiming to 136 * be compatible with other operating systems, exposing 137 * BIOS issues such as skipped device initialization. 138 * 139 * So "Linux" turned out to be a really poor chose of 140 * OSI string, and from Linux-2.6.23 onward we respond FALSE. 141 * 142 * BIOS writers should NOT query _OSI(Linux) on future systems. 143 * Linux will complain on the console when it sees it, and return FALSE. 144 * To get Linux to return TRUE for your system will require 145 * a kernel source update to add a DMI entry, 146 * or boot with "acpi_osi=Linux" 147 */ 148 149 static struct osi_linux { 150 unsigned int enable:1; 151 unsigned int dmi:1; 152 unsigned int cmdline:1; 153 } osi_linux = {0, 0, 0}; 154 155 static u32 acpi_osi_handler(acpi_string interface, u32 supported) 156 { 157 if (!strcmp("Linux", interface)) { 158 159 printk(KERN_NOTICE FW_BUG PREFIX 160 "BIOS _OSI(Linux) query %s%s\n", 161 osi_linux.enable ? "honored" : "ignored", 162 osi_linux.cmdline ? " via cmdline" : 163 osi_linux.dmi ? " via DMI" : ""); 164 } 165 166 return supported; 167 } 168 169 static void __init acpi_request_region (struct acpi_generic_address *addr, 170 unsigned int length, char *desc) 171 { 172 if (!addr->address || !length) 173 return; 174 175 /* Resources are never freed */ 176 if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_IO) 177 request_region(addr->address, length, desc); 178 else if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) 179 request_mem_region(addr->address, length, desc); 180 } 181 182 static int __init acpi_reserve_resources(void) 183 { 184 acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length, 185 "ACPI PM1a_EVT_BLK"); 186 187 acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length, 188 "ACPI PM1b_EVT_BLK"); 189 190 acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length, 191 "ACPI PM1a_CNT_BLK"); 192 193 acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length, 194 "ACPI PM1b_CNT_BLK"); 195 196 if (acpi_gbl_FADT.pm_timer_length == 4) 197 acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR"); 198 199 acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length, 200 "ACPI PM2_CNT_BLK"); 201 202 /* Length of GPE blocks must be a non-negative multiple of 2 */ 203 204 if (!(acpi_gbl_FADT.gpe0_block_length & 0x1)) 205 acpi_request_region(&acpi_gbl_FADT.xgpe0_block, 206 acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK"); 207 208 if (!(acpi_gbl_FADT.gpe1_block_length & 0x1)) 209 acpi_request_region(&acpi_gbl_FADT.xgpe1_block, 210 acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK"); 211 212 return 0; 213 } 214 device_initcall(acpi_reserve_resources); 215 216 void acpi_os_printf(const char *fmt, ...) 217 { 218 va_list args; 219 va_start(args, fmt); 220 acpi_os_vprintf(fmt, args); 221 va_end(args); 222 } 223 224 void acpi_os_vprintf(const char *fmt, va_list args) 225 { 226 static char buffer[512]; 227 228 vsprintf(buffer, fmt, args); 229 230 #ifdef ENABLE_DEBUGGER 231 if (acpi_in_debugger) { 232 kdb_printf("%s", buffer); 233 } else { 234 printk(KERN_CONT "%s", buffer); 235 } 236 #else 237 printk(KERN_CONT "%s", buffer); 238 #endif 239 } 240 241 acpi_physical_address __init acpi_os_get_root_pointer(void) 242 { 243 if (efi_enabled) { 244 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) 245 return efi.acpi20; 246 else if (efi.acpi != EFI_INVALID_TABLE_ADDR) 247 return efi.acpi; 248 else { 249 printk(KERN_ERR PREFIX 250 "System description tables not found\n"); 251 return 0; 252 } 253 } else { 254 acpi_physical_address pa = 0; 255 256 acpi_find_root_pointer(&pa); 257 return pa; 258 } 259 } 260 261 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ 262 static struct acpi_ioremap * 263 acpi_map_lookup(acpi_physical_address phys, acpi_size size) 264 { 265 struct acpi_ioremap *map; 266 267 list_for_each_entry_rcu(map, &acpi_ioremaps, list) 268 if (map->phys <= phys && 269 phys + size <= map->phys + map->size) 270 return map; 271 272 return NULL; 273 } 274 275 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ 276 static void __iomem * 277 acpi_map_vaddr_lookup(acpi_physical_address phys, unsigned int size) 278 { 279 struct acpi_ioremap *map; 280 281 map = acpi_map_lookup(phys, size); 282 if (map) 283 return map->virt + (phys - map->phys); 284 285 return NULL; 286 } 287 288 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ 289 static struct acpi_ioremap * 290 acpi_map_lookup_virt(void __iomem *virt, acpi_size size) 291 { 292 struct acpi_ioremap *map; 293 294 list_for_each_entry_rcu(map, &acpi_ioremaps, list) 295 if (map->virt <= virt && 296 virt + size <= map->virt + map->size) 297 return map; 298 299 return NULL; 300 } 301 302 void __iomem *__init_refok 303 acpi_os_map_memory(acpi_physical_address phys, acpi_size size) 304 { 305 struct acpi_ioremap *map, *tmp_map; 306 unsigned long flags; 307 void __iomem *virt; 308 acpi_physical_address pg_off; 309 acpi_size pg_sz; 310 311 if (phys > ULONG_MAX) { 312 printk(KERN_ERR PREFIX "Cannot map memory that high\n"); 313 return NULL; 314 } 315 316 if (!acpi_gbl_permanent_mmap) 317 return __acpi_map_table((unsigned long)phys, size); 318 319 map = kzalloc(sizeof(*map), GFP_KERNEL); 320 if (!map) 321 return NULL; 322 323 pg_off = round_down(phys, PAGE_SIZE); 324 pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off; 325 virt = acpi_os_ioremap(pg_off, pg_sz); 326 if (!virt) { 327 kfree(map); 328 return NULL; 329 } 330 331 INIT_LIST_HEAD(&map->list); 332 map->virt = virt; 333 map->phys = pg_off; 334 map->size = pg_sz; 335 kref_init(&map->ref); 336 337 spin_lock_irqsave(&acpi_ioremap_lock, flags); 338 /* Check if page has already been mapped. */ 339 tmp_map = acpi_map_lookup(phys, size); 340 if (tmp_map) { 341 kref_get(&tmp_map->ref); 342 spin_unlock_irqrestore(&acpi_ioremap_lock, flags); 343 iounmap(map->virt); 344 kfree(map); 345 return tmp_map->virt + (phys - tmp_map->phys); 346 } 347 list_add_tail_rcu(&map->list, &acpi_ioremaps); 348 spin_unlock_irqrestore(&acpi_ioremap_lock, flags); 349 350 return map->virt + (phys - map->phys); 351 } 352 EXPORT_SYMBOL_GPL(acpi_os_map_memory); 353 354 static void acpi_kref_del_iomap(struct kref *ref) 355 { 356 struct acpi_ioremap *map; 357 358 map = container_of(ref, struct acpi_ioremap, ref); 359 list_del_rcu(&map->list); 360 } 361 362 void __ref acpi_os_unmap_memory(void __iomem *virt, acpi_size size) 363 { 364 struct acpi_ioremap *map; 365 unsigned long flags; 366 int del; 367 368 if (!acpi_gbl_permanent_mmap) { 369 __acpi_unmap_table(virt, size); 370 return; 371 } 372 373 spin_lock_irqsave(&acpi_ioremap_lock, flags); 374 map = acpi_map_lookup_virt(virt, size); 375 if (!map) { 376 spin_unlock_irqrestore(&acpi_ioremap_lock, flags); 377 printk(KERN_ERR PREFIX "%s: bad address %p\n", __func__, virt); 378 dump_stack(); 379 return; 380 } 381 382 del = kref_put(&map->ref, acpi_kref_del_iomap); 383 spin_unlock_irqrestore(&acpi_ioremap_lock, flags); 384 385 if (!del) 386 return; 387 388 synchronize_rcu(); 389 iounmap(map->virt); 390 kfree(map); 391 } 392 EXPORT_SYMBOL_GPL(acpi_os_unmap_memory); 393 394 void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size) 395 { 396 if (!acpi_gbl_permanent_mmap) 397 __acpi_unmap_table(virt, size); 398 } 399 400 int acpi_os_map_generic_address(struct acpi_generic_address *addr) 401 { 402 void __iomem *virt; 403 404 if (addr->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) 405 return 0; 406 407 if (!addr->address || !addr->bit_width) 408 return -EINVAL; 409 410 virt = acpi_os_map_memory(addr->address, addr->bit_width / 8); 411 if (!virt) 412 return -EIO; 413 414 return 0; 415 } 416 EXPORT_SYMBOL_GPL(acpi_os_map_generic_address); 417 418 void acpi_os_unmap_generic_address(struct acpi_generic_address *addr) 419 { 420 void __iomem *virt; 421 unsigned long flags; 422 acpi_size size = addr->bit_width / 8; 423 424 if (addr->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) 425 return; 426 427 if (!addr->address || !addr->bit_width) 428 return; 429 430 spin_lock_irqsave(&acpi_ioremap_lock, flags); 431 virt = acpi_map_vaddr_lookup(addr->address, size); 432 spin_unlock_irqrestore(&acpi_ioremap_lock, flags); 433 434 acpi_os_unmap_memory(virt, size); 435 } 436 EXPORT_SYMBOL_GPL(acpi_os_unmap_generic_address); 437 438 #ifdef ACPI_FUTURE_USAGE 439 acpi_status 440 acpi_os_get_physical_address(void *virt, acpi_physical_address * phys) 441 { 442 if (!phys || !virt) 443 return AE_BAD_PARAMETER; 444 445 *phys = virt_to_phys(virt); 446 447 return AE_OK; 448 } 449 #endif 450 451 #define ACPI_MAX_OVERRIDE_LEN 100 452 453 static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN]; 454 455 acpi_status 456 acpi_os_predefined_override(const struct acpi_predefined_names *init_val, 457 acpi_string * new_val) 458 { 459 if (!init_val || !new_val) 460 return AE_BAD_PARAMETER; 461 462 *new_val = NULL; 463 if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) { 464 printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n", 465 acpi_os_name); 466 *new_val = acpi_os_name; 467 } 468 469 return AE_OK; 470 } 471 472 acpi_status 473 acpi_os_table_override(struct acpi_table_header * existing_table, 474 struct acpi_table_header ** new_table) 475 { 476 if (!existing_table || !new_table) 477 return AE_BAD_PARAMETER; 478 479 *new_table = NULL; 480 481 #ifdef CONFIG_ACPI_CUSTOM_DSDT 482 if (strncmp(existing_table->signature, "DSDT", 4) == 0) 483 *new_table = (struct acpi_table_header *)AmlCode; 484 #endif 485 if (*new_table != NULL) { 486 printk(KERN_WARNING PREFIX "Override [%4.4s-%8.8s], " 487 "this is unsafe: tainting kernel\n", 488 existing_table->signature, 489 existing_table->oem_table_id); 490 add_taint(TAINT_OVERRIDDEN_ACPI_TABLE); 491 } 492 return AE_OK; 493 } 494 495 static irqreturn_t acpi_irq(int irq, void *dev_id) 496 { 497 u32 handled; 498 499 handled = (*acpi_irq_handler) (acpi_irq_context); 500 501 if (handled) { 502 acpi_irq_handled++; 503 return IRQ_HANDLED; 504 } else { 505 acpi_irq_not_handled++; 506 return IRQ_NONE; 507 } 508 } 509 510 acpi_status 511 acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler, 512 void *context) 513 { 514 unsigned int irq; 515 516 acpi_irq_stats_init(); 517 518 /* 519 * Ignore the GSI from the core, and use the value in our copy of the 520 * FADT. It may not be the same if an interrupt source override exists 521 * for the SCI. 522 */ 523 gsi = acpi_gbl_FADT.sci_interrupt; 524 if (acpi_gsi_to_irq(gsi, &irq) < 0) { 525 printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n", 526 gsi); 527 return AE_OK; 528 } 529 530 acpi_irq_handler = handler; 531 acpi_irq_context = context; 532 if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) { 533 printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq); 534 return AE_NOT_ACQUIRED; 535 } 536 acpi_irq_irq = irq; 537 538 return AE_OK; 539 } 540 541 acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler) 542 { 543 if (irq) { 544 free_irq(irq, acpi_irq); 545 acpi_irq_handler = NULL; 546 acpi_irq_irq = 0; 547 } 548 549 return AE_OK; 550 } 551 552 /* 553 * Running in interpreter thread context, safe to sleep 554 */ 555 556 void acpi_os_sleep(u64 ms) 557 { 558 schedule_timeout_interruptible(msecs_to_jiffies(ms)); 559 } 560 561 void acpi_os_stall(u32 us) 562 { 563 while (us) { 564 u32 delay = 1000; 565 566 if (delay > us) 567 delay = us; 568 udelay(delay); 569 touch_nmi_watchdog(); 570 us -= delay; 571 } 572 } 573 574 /* 575 * Support ACPI 3.0 AML Timer operand 576 * Returns 64-bit free-running, monotonically increasing timer 577 * with 100ns granularity 578 */ 579 u64 acpi_os_get_timer(void) 580 { 581 static u64 t; 582 583 #ifdef CONFIG_HPET 584 /* TBD: use HPET if available */ 585 #endif 586 587 #ifdef CONFIG_X86_PM_TIMER 588 /* TBD: default to PM timer if HPET was not available */ 589 #endif 590 if (!t) 591 printk(KERN_ERR PREFIX "acpi_os_get_timer() TBD\n"); 592 593 return ++t; 594 } 595 596 acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width) 597 { 598 u32 dummy; 599 600 if (!value) 601 value = &dummy; 602 603 *value = 0; 604 if (width <= 8) { 605 *(u8 *) value = inb(port); 606 } else if (width <= 16) { 607 *(u16 *) value = inw(port); 608 } else if (width <= 32) { 609 *(u32 *) value = inl(port); 610 } else { 611 BUG(); 612 } 613 614 return AE_OK; 615 } 616 617 EXPORT_SYMBOL(acpi_os_read_port); 618 619 acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width) 620 { 621 if (width <= 8) { 622 outb(value, port); 623 } else if (width <= 16) { 624 outw(value, port); 625 } else if (width <= 32) { 626 outl(value, port); 627 } else { 628 BUG(); 629 } 630 631 return AE_OK; 632 } 633 634 EXPORT_SYMBOL(acpi_os_write_port); 635 636 acpi_status 637 acpi_os_read_memory(acpi_physical_address phys_addr, u32 * value, u32 width) 638 { 639 void __iomem *virt_addr; 640 unsigned int size = width / 8; 641 bool unmap = false; 642 u32 dummy; 643 644 rcu_read_lock(); 645 virt_addr = acpi_map_vaddr_lookup(phys_addr, size); 646 if (!virt_addr) { 647 rcu_read_unlock(); 648 virt_addr = acpi_os_ioremap(phys_addr, size); 649 if (!virt_addr) 650 return AE_BAD_ADDRESS; 651 unmap = true; 652 } 653 654 if (!value) 655 value = &dummy; 656 657 switch (width) { 658 case 8: 659 *(u8 *) value = readb(virt_addr); 660 break; 661 case 16: 662 *(u16 *) value = readw(virt_addr); 663 break; 664 case 32: 665 *(u32 *) value = readl(virt_addr); 666 break; 667 default: 668 BUG(); 669 } 670 671 if (unmap) 672 iounmap(virt_addr); 673 else 674 rcu_read_unlock(); 675 676 return AE_OK; 677 } 678 679 acpi_status 680 acpi_os_write_memory(acpi_physical_address phys_addr, u32 value, u32 width) 681 { 682 void __iomem *virt_addr; 683 unsigned int size = width / 8; 684 bool unmap = false; 685 686 rcu_read_lock(); 687 virt_addr = acpi_map_vaddr_lookup(phys_addr, size); 688 if (!virt_addr) { 689 rcu_read_unlock(); 690 virt_addr = acpi_os_ioremap(phys_addr, size); 691 if (!virt_addr) 692 return AE_BAD_ADDRESS; 693 unmap = true; 694 } 695 696 switch (width) { 697 case 8: 698 writeb(value, virt_addr); 699 break; 700 case 16: 701 writew(value, virt_addr); 702 break; 703 case 32: 704 writel(value, virt_addr); 705 break; 706 default: 707 BUG(); 708 } 709 710 if (unmap) 711 iounmap(virt_addr); 712 else 713 rcu_read_unlock(); 714 715 return AE_OK; 716 } 717 718 acpi_status 719 acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, 720 u64 *value, u32 width) 721 { 722 int result, size; 723 u32 value32; 724 725 if (!value) 726 return AE_BAD_PARAMETER; 727 728 switch (width) { 729 case 8: 730 size = 1; 731 break; 732 case 16: 733 size = 2; 734 break; 735 case 32: 736 size = 4; 737 break; 738 default: 739 return AE_ERROR; 740 } 741 742 result = raw_pci_read(pci_id->segment, pci_id->bus, 743 PCI_DEVFN(pci_id->device, pci_id->function), 744 reg, size, &value32); 745 *value = value32; 746 747 return (result ? AE_ERROR : AE_OK); 748 } 749 750 acpi_status 751 acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, 752 u64 value, u32 width) 753 { 754 int result, size; 755 756 switch (width) { 757 case 8: 758 size = 1; 759 break; 760 case 16: 761 size = 2; 762 break; 763 case 32: 764 size = 4; 765 break; 766 default: 767 return AE_ERROR; 768 } 769 770 result = raw_pci_write(pci_id->segment, pci_id->bus, 771 PCI_DEVFN(pci_id->device, pci_id->function), 772 reg, size, value); 773 774 return (result ? AE_ERROR : AE_OK); 775 } 776 777 static void acpi_os_execute_deferred(struct work_struct *work) 778 { 779 struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work); 780 781 if (dpc->wait) 782 acpi_os_wait_events_complete(NULL); 783 784 dpc->function(dpc->context); 785 kfree(dpc); 786 } 787 788 /******************************************************************************* 789 * 790 * FUNCTION: acpi_os_execute 791 * 792 * PARAMETERS: Type - Type of the callback 793 * Function - Function to be executed 794 * Context - Function parameters 795 * 796 * RETURN: Status 797 * 798 * DESCRIPTION: Depending on type, either queues function for deferred execution or 799 * immediately executes function on a separate thread. 800 * 801 ******************************************************************************/ 802 803 static acpi_status __acpi_os_execute(acpi_execute_type type, 804 acpi_osd_exec_callback function, void *context, int hp) 805 { 806 acpi_status status = AE_OK; 807 struct acpi_os_dpc *dpc; 808 struct workqueue_struct *queue; 809 int ret; 810 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 811 "Scheduling function [%p(%p)] for deferred execution.\n", 812 function, context)); 813 814 /* 815 * Allocate/initialize DPC structure. Note that this memory will be 816 * freed by the callee. The kernel handles the work_struct list in a 817 * way that allows us to also free its memory inside the callee. 818 * Because we may want to schedule several tasks with different 819 * parameters we can't use the approach some kernel code uses of 820 * having a static work_struct. 821 */ 822 823 dpc = kmalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC); 824 if (!dpc) 825 return AE_NO_MEMORY; 826 827 dpc->function = function; 828 dpc->context = context; 829 830 /* 831 * We can't run hotplug code in keventd_wq/kacpid_wq/kacpid_notify_wq 832 * because the hotplug code may call driver .remove() functions, 833 * which invoke flush_scheduled_work/acpi_os_wait_events_complete 834 * to flush these workqueues. 835 */ 836 queue = hp ? kacpi_hotplug_wq : 837 (type == OSL_NOTIFY_HANDLER ? kacpi_notify_wq : kacpid_wq); 838 dpc->wait = hp ? 1 : 0; 839 840 if (queue == kacpi_hotplug_wq) 841 INIT_WORK(&dpc->work, acpi_os_execute_deferred); 842 else if (queue == kacpi_notify_wq) 843 INIT_WORK(&dpc->work, acpi_os_execute_deferred); 844 else 845 INIT_WORK(&dpc->work, acpi_os_execute_deferred); 846 847 /* 848 * On some machines, a software-initiated SMI causes corruption unless 849 * the SMI runs on CPU 0. An SMI can be initiated by any AML, but 850 * typically it's done in GPE-related methods that are run via 851 * workqueues, so we can avoid the known corruption cases by always 852 * queueing on CPU 0. 853 */ 854 ret = queue_work_on(0, queue, &dpc->work); 855 856 if (!ret) { 857 printk(KERN_ERR PREFIX 858 "Call to queue_work() failed.\n"); 859 status = AE_ERROR; 860 kfree(dpc); 861 } 862 return status; 863 } 864 865 acpi_status acpi_os_execute(acpi_execute_type type, 866 acpi_osd_exec_callback function, void *context) 867 { 868 return __acpi_os_execute(type, function, context, 0); 869 } 870 EXPORT_SYMBOL(acpi_os_execute); 871 872 acpi_status acpi_os_hotplug_execute(acpi_osd_exec_callback function, 873 void *context) 874 { 875 return __acpi_os_execute(0, function, context, 1); 876 } 877 878 void acpi_os_wait_events_complete(void *context) 879 { 880 flush_workqueue(kacpid_wq); 881 flush_workqueue(kacpi_notify_wq); 882 } 883 884 EXPORT_SYMBOL(acpi_os_wait_events_complete); 885 886 /* 887 * Deallocate the memory for a spinlock. 888 */ 889 void acpi_os_delete_lock(acpi_spinlock handle) 890 { 891 return; 892 } 893 894 acpi_status 895 acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle) 896 { 897 struct semaphore *sem = NULL; 898 899 sem = acpi_os_allocate(sizeof(struct semaphore)); 900 if (!sem) 901 return AE_NO_MEMORY; 902 memset(sem, 0, sizeof(struct semaphore)); 903 904 sema_init(sem, initial_units); 905 906 *handle = (acpi_handle *) sem; 907 908 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n", 909 *handle, initial_units)); 910 911 return AE_OK; 912 } 913 914 /* 915 * TODO: A better way to delete semaphores? Linux doesn't have a 916 * 'delete_semaphore()' function -- may result in an invalid 917 * pointer dereference for non-synchronized consumers. Should 918 * we at least check for blocked threads and signal/cancel them? 919 */ 920 921 acpi_status acpi_os_delete_semaphore(acpi_handle handle) 922 { 923 struct semaphore *sem = (struct semaphore *)handle; 924 925 if (!sem) 926 return AE_BAD_PARAMETER; 927 928 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle)); 929 930 BUG_ON(!list_empty(&sem->wait_list)); 931 kfree(sem); 932 sem = NULL; 933 934 return AE_OK; 935 } 936 937 /* 938 * TODO: Support for units > 1? 939 */ 940 acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout) 941 { 942 acpi_status status = AE_OK; 943 struct semaphore *sem = (struct semaphore *)handle; 944 long jiffies; 945 int ret = 0; 946 947 if (!sem || (units < 1)) 948 return AE_BAD_PARAMETER; 949 950 if (units > 1) 951 return AE_SUPPORT; 952 953 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n", 954 handle, units, timeout)); 955 956 if (timeout == ACPI_WAIT_FOREVER) 957 jiffies = MAX_SCHEDULE_TIMEOUT; 958 else 959 jiffies = msecs_to_jiffies(timeout); 960 961 ret = down_timeout(sem, jiffies); 962 if (ret) 963 status = AE_TIME; 964 965 if (ACPI_FAILURE(status)) { 966 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, 967 "Failed to acquire semaphore[%p|%d|%d], %s", 968 handle, units, timeout, 969 acpi_format_exception(status))); 970 } else { 971 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, 972 "Acquired semaphore[%p|%d|%d]", handle, 973 units, timeout)); 974 } 975 976 return status; 977 } 978 979 /* 980 * TODO: Support for units > 1? 981 */ 982 acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units) 983 { 984 struct semaphore *sem = (struct semaphore *)handle; 985 986 if (!sem || (units < 1)) 987 return AE_BAD_PARAMETER; 988 989 if (units > 1) 990 return AE_SUPPORT; 991 992 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle, 993 units)); 994 995 up(sem); 996 997 return AE_OK; 998 } 999 1000 #ifdef ACPI_FUTURE_USAGE 1001 u32 acpi_os_get_line(char *buffer) 1002 { 1003 1004 #ifdef ENABLE_DEBUGGER 1005 if (acpi_in_debugger) { 1006 u32 chars; 1007 1008 kdb_read(buffer, sizeof(line_buf)); 1009 1010 /* remove the CR kdb includes */ 1011 chars = strlen(buffer) - 1; 1012 buffer[chars] = '\0'; 1013 } 1014 #endif 1015 1016 return 0; 1017 } 1018 #endif /* ACPI_FUTURE_USAGE */ 1019 1020 acpi_status acpi_os_signal(u32 function, void *info) 1021 { 1022 switch (function) { 1023 case ACPI_SIGNAL_FATAL: 1024 printk(KERN_ERR PREFIX "Fatal opcode executed\n"); 1025 break; 1026 case ACPI_SIGNAL_BREAKPOINT: 1027 /* 1028 * AML Breakpoint 1029 * ACPI spec. says to treat it as a NOP unless 1030 * you are debugging. So if/when we integrate 1031 * AML debugger into the kernel debugger its 1032 * hook will go here. But until then it is 1033 * not useful to print anything on breakpoints. 1034 */ 1035 break; 1036 default: 1037 break; 1038 } 1039 1040 return AE_OK; 1041 } 1042 1043 static int __init acpi_os_name_setup(char *str) 1044 { 1045 char *p = acpi_os_name; 1046 int count = ACPI_MAX_OVERRIDE_LEN - 1; 1047 1048 if (!str || !*str) 1049 return 0; 1050 1051 for (; count-- && str && *str; str++) { 1052 if (isalnum(*str) || *str == ' ' || *str == ':') 1053 *p++ = *str; 1054 else if (*str == '\'' || *str == '"') 1055 continue; 1056 else 1057 break; 1058 } 1059 *p = 0; 1060 1061 return 1; 1062 1063 } 1064 1065 __setup("acpi_os_name=", acpi_os_name_setup); 1066 1067 #define OSI_STRING_LENGTH_MAX 64 /* arbitrary */ 1068 #define OSI_STRING_ENTRIES_MAX 16 /* arbitrary */ 1069 1070 struct osi_setup_entry { 1071 char string[OSI_STRING_LENGTH_MAX]; 1072 bool enable; 1073 }; 1074 1075 static struct osi_setup_entry __initdata osi_setup_entries[OSI_STRING_ENTRIES_MAX]; 1076 1077 void __init acpi_osi_setup(char *str) 1078 { 1079 struct osi_setup_entry *osi; 1080 bool enable = true; 1081 int i; 1082 1083 if (!acpi_gbl_create_osi_method) 1084 return; 1085 1086 if (str == NULL || *str == '\0') { 1087 printk(KERN_INFO PREFIX "_OSI method disabled\n"); 1088 acpi_gbl_create_osi_method = FALSE; 1089 return; 1090 } 1091 1092 if (*str == '!') { 1093 str++; 1094 enable = false; 1095 } 1096 1097 for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { 1098 osi = &osi_setup_entries[i]; 1099 if (!strcmp(osi->string, str)) { 1100 osi->enable = enable; 1101 break; 1102 } else if (osi->string[0] == '\0') { 1103 osi->enable = enable; 1104 strncpy(osi->string, str, OSI_STRING_LENGTH_MAX); 1105 break; 1106 } 1107 } 1108 } 1109 1110 static void __init set_osi_linux(unsigned int enable) 1111 { 1112 if (osi_linux.enable != enable) 1113 osi_linux.enable = enable; 1114 1115 if (osi_linux.enable) 1116 acpi_osi_setup("Linux"); 1117 else 1118 acpi_osi_setup("!Linux"); 1119 1120 return; 1121 } 1122 1123 static void __init acpi_cmdline_osi_linux(unsigned int enable) 1124 { 1125 osi_linux.cmdline = 1; /* cmdline set the default and override DMI */ 1126 osi_linux.dmi = 0; 1127 set_osi_linux(enable); 1128 1129 return; 1130 } 1131 1132 void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d) 1133 { 1134 printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident); 1135 1136 if (enable == -1) 1137 return; 1138 1139 osi_linux.dmi = 1; /* DMI knows that this box asks OSI(Linux) */ 1140 set_osi_linux(enable); 1141 1142 return; 1143 } 1144 1145 /* 1146 * Modify the list of "OS Interfaces" reported to BIOS via _OSI 1147 * 1148 * empty string disables _OSI 1149 * string starting with '!' disables that string 1150 * otherwise string is added to list, augmenting built-in strings 1151 */ 1152 static void __init acpi_osi_setup_late(void) 1153 { 1154 struct osi_setup_entry *osi; 1155 char *str; 1156 int i; 1157 acpi_status status; 1158 1159 for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { 1160 osi = &osi_setup_entries[i]; 1161 str = osi->string; 1162 1163 if (*str == '\0') 1164 break; 1165 if (osi->enable) { 1166 status = acpi_install_interface(str); 1167 1168 if (ACPI_SUCCESS(status)) 1169 printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str); 1170 } else { 1171 status = acpi_remove_interface(str); 1172 1173 if (ACPI_SUCCESS(status)) 1174 printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str); 1175 } 1176 } 1177 } 1178 1179 static int __init osi_setup(char *str) 1180 { 1181 if (str && !strcmp("Linux", str)) 1182 acpi_cmdline_osi_linux(1); 1183 else if (str && !strcmp("!Linux", str)) 1184 acpi_cmdline_osi_linux(0); 1185 else 1186 acpi_osi_setup(str); 1187 1188 return 1; 1189 } 1190 1191 __setup("acpi_osi=", osi_setup); 1192 1193 /* enable serialization to combat AE_ALREADY_EXISTS errors */ 1194 static int __init acpi_serialize_setup(char *str) 1195 { 1196 printk(KERN_INFO PREFIX "serialize enabled\n"); 1197 1198 acpi_gbl_all_methods_serialized = TRUE; 1199 1200 return 1; 1201 } 1202 1203 __setup("acpi_serialize", acpi_serialize_setup); 1204 1205 /* Check of resource interference between native drivers and ACPI 1206 * OperationRegions (SystemIO and System Memory only). 1207 * IO ports and memory declared in ACPI might be used by the ACPI subsystem 1208 * in arbitrary AML code and can interfere with legacy drivers. 1209 * acpi_enforce_resources= can be set to: 1210 * 1211 * - strict (default) (2) 1212 * -> further driver trying to access the resources will not load 1213 * - lax (1) 1214 * -> further driver trying to access the resources will load, but you 1215 * get a system message that something might go wrong... 1216 * 1217 * - no (0) 1218 * -> ACPI Operation Region resources will not be registered 1219 * 1220 */ 1221 #define ENFORCE_RESOURCES_STRICT 2 1222 #define ENFORCE_RESOURCES_LAX 1 1223 #define ENFORCE_RESOURCES_NO 0 1224 1225 static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; 1226 1227 static int __init acpi_enforce_resources_setup(char *str) 1228 { 1229 if (str == NULL || *str == '\0') 1230 return 0; 1231 1232 if (!strcmp("strict", str)) 1233 acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; 1234 else if (!strcmp("lax", str)) 1235 acpi_enforce_resources = ENFORCE_RESOURCES_LAX; 1236 else if (!strcmp("no", str)) 1237 acpi_enforce_resources = ENFORCE_RESOURCES_NO; 1238 1239 return 1; 1240 } 1241 1242 __setup("acpi_enforce_resources=", acpi_enforce_resources_setup); 1243 1244 /* Check for resource conflicts between ACPI OperationRegions and native 1245 * drivers */ 1246 int acpi_check_resource_conflict(const struct resource *res) 1247 { 1248 struct acpi_res_list *res_list_elem; 1249 int ioport = 0, clash = 0; 1250 1251 if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) 1252 return 0; 1253 if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM)) 1254 return 0; 1255 1256 ioport = res->flags & IORESOURCE_IO; 1257 1258 spin_lock(&acpi_res_lock); 1259 list_for_each_entry(res_list_elem, &resource_list_head, 1260 resource_list) { 1261 if (ioport && (res_list_elem->resource_type 1262 != ACPI_ADR_SPACE_SYSTEM_IO)) 1263 continue; 1264 if (!ioport && (res_list_elem->resource_type 1265 != ACPI_ADR_SPACE_SYSTEM_MEMORY)) 1266 continue; 1267 1268 if (res->end < res_list_elem->start 1269 || res_list_elem->end < res->start) 1270 continue; 1271 clash = 1; 1272 break; 1273 } 1274 spin_unlock(&acpi_res_lock); 1275 1276 if (clash) { 1277 if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) { 1278 printk(KERN_WARNING "ACPI: resource %s %pR" 1279 " conflicts with ACPI region %s " 1280 "[%s 0x%zx-0x%zx]\n", 1281 res->name, res, res_list_elem->name, 1282 (res_list_elem->resource_type == 1283 ACPI_ADR_SPACE_SYSTEM_IO) ? "io" : "mem", 1284 (size_t) res_list_elem->start, 1285 (size_t) res_list_elem->end); 1286 if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX) 1287 printk(KERN_NOTICE "ACPI: This conflict may" 1288 " cause random problems and system" 1289 " instability\n"); 1290 printk(KERN_INFO "ACPI: If an ACPI driver is available" 1291 " for this device, you should use it instead of" 1292 " the native driver\n"); 1293 } 1294 if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT) 1295 return -EBUSY; 1296 } 1297 return 0; 1298 } 1299 EXPORT_SYMBOL(acpi_check_resource_conflict); 1300 1301 int acpi_check_region(resource_size_t start, resource_size_t n, 1302 const char *name) 1303 { 1304 struct resource res = { 1305 .start = start, 1306 .end = start + n - 1, 1307 .name = name, 1308 .flags = IORESOURCE_IO, 1309 }; 1310 1311 return acpi_check_resource_conflict(&res); 1312 } 1313 EXPORT_SYMBOL(acpi_check_region); 1314 1315 /* 1316 * Let drivers know whether the resource checks are effective 1317 */ 1318 int acpi_resources_are_enforced(void) 1319 { 1320 return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT; 1321 } 1322 EXPORT_SYMBOL(acpi_resources_are_enforced); 1323 1324 /* 1325 * Acquire a spinlock. 1326 * 1327 * handle is a pointer to the spinlock_t. 1328 */ 1329 1330 acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp) 1331 { 1332 acpi_cpu_flags flags; 1333 spin_lock_irqsave(lockp, flags); 1334 return flags; 1335 } 1336 1337 /* 1338 * Release a spinlock. See above. 1339 */ 1340 1341 void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags) 1342 { 1343 spin_unlock_irqrestore(lockp, flags); 1344 } 1345 1346 #ifndef ACPI_USE_LOCAL_CACHE 1347 1348 /******************************************************************************* 1349 * 1350 * FUNCTION: acpi_os_create_cache 1351 * 1352 * PARAMETERS: name - Ascii name for the cache 1353 * size - Size of each cached object 1354 * depth - Maximum depth of the cache (in objects) <ignored> 1355 * cache - Where the new cache object is returned 1356 * 1357 * RETURN: status 1358 * 1359 * DESCRIPTION: Create a cache object 1360 * 1361 ******************************************************************************/ 1362 1363 acpi_status 1364 acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache) 1365 { 1366 *cache = kmem_cache_create(name, size, 0, 0, NULL); 1367 if (*cache == NULL) 1368 return AE_ERROR; 1369 else 1370 return AE_OK; 1371 } 1372 1373 /******************************************************************************* 1374 * 1375 * FUNCTION: acpi_os_purge_cache 1376 * 1377 * PARAMETERS: Cache - Handle to cache object 1378 * 1379 * RETURN: Status 1380 * 1381 * DESCRIPTION: Free all objects within the requested cache. 1382 * 1383 ******************************************************************************/ 1384 1385 acpi_status acpi_os_purge_cache(acpi_cache_t * cache) 1386 { 1387 kmem_cache_shrink(cache); 1388 return (AE_OK); 1389 } 1390 1391 /******************************************************************************* 1392 * 1393 * FUNCTION: acpi_os_delete_cache 1394 * 1395 * PARAMETERS: Cache - Handle to cache object 1396 * 1397 * RETURN: Status 1398 * 1399 * DESCRIPTION: Free all objects within the requested cache and delete the 1400 * cache object. 1401 * 1402 ******************************************************************************/ 1403 1404 acpi_status acpi_os_delete_cache(acpi_cache_t * cache) 1405 { 1406 kmem_cache_destroy(cache); 1407 return (AE_OK); 1408 } 1409 1410 /******************************************************************************* 1411 * 1412 * FUNCTION: acpi_os_release_object 1413 * 1414 * PARAMETERS: Cache - Handle to cache object 1415 * Object - The object to be released 1416 * 1417 * RETURN: None 1418 * 1419 * DESCRIPTION: Release an object to the specified cache. If cache is full, 1420 * the object is deleted. 1421 * 1422 ******************************************************************************/ 1423 1424 acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object) 1425 { 1426 kmem_cache_free(cache, object); 1427 return (AE_OK); 1428 } 1429 1430 static inline int acpi_res_list_add(struct acpi_res_list *res) 1431 { 1432 struct acpi_res_list *res_list_elem; 1433 1434 list_for_each_entry(res_list_elem, &resource_list_head, 1435 resource_list) { 1436 1437 if (res->resource_type == res_list_elem->resource_type && 1438 res->start == res_list_elem->start && 1439 res->end == res_list_elem->end) { 1440 1441 /* 1442 * The Region(addr,len) already exist in the list, 1443 * just increase the count 1444 */ 1445 1446 res_list_elem->count++; 1447 return 0; 1448 } 1449 } 1450 1451 res->count = 1; 1452 list_add(&res->resource_list, &resource_list_head); 1453 return 1; 1454 } 1455 1456 static inline void acpi_res_list_del(struct acpi_res_list *res) 1457 { 1458 struct acpi_res_list *res_list_elem; 1459 1460 list_for_each_entry(res_list_elem, &resource_list_head, 1461 resource_list) { 1462 1463 if (res->resource_type == res_list_elem->resource_type && 1464 res->start == res_list_elem->start && 1465 res->end == res_list_elem->end) { 1466 1467 /* 1468 * If the res count is decreased to 0, 1469 * remove and free it 1470 */ 1471 1472 if (--res_list_elem->count == 0) { 1473 list_del(&res_list_elem->resource_list); 1474 kfree(res_list_elem); 1475 } 1476 return; 1477 } 1478 } 1479 } 1480 1481 acpi_status 1482 acpi_os_invalidate_address( 1483 u8 space_id, 1484 acpi_physical_address address, 1485 acpi_size length) 1486 { 1487 struct acpi_res_list res; 1488 1489 switch (space_id) { 1490 case ACPI_ADR_SPACE_SYSTEM_IO: 1491 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1492 /* Only interference checks against SystemIO and SystemMemory 1493 are needed */ 1494 res.start = address; 1495 res.end = address + length - 1; 1496 res.resource_type = space_id; 1497 spin_lock(&acpi_res_lock); 1498 acpi_res_list_del(&res); 1499 spin_unlock(&acpi_res_lock); 1500 break; 1501 case ACPI_ADR_SPACE_PCI_CONFIG: 1502 case ACPI_ADR_SPACE_EC: 1503 case ACPI_ADR_SPACE_SMBUS: 1504 case ACPI_ADR_SPACE_CMOS: 1505 case ACPI_ADR_SPACE_PCI_BAR_TARGET: 1506 case ACPI_ADR_SPACE_DATA_TABLE: 1507 case ACPI_ADR_SPACE_FIXED_HARDWARE: 1508 break; 1509 } 1510 return AE_OK; 1511 } 1512 1513 /****************************************************************************** 1514 * 1515 * FUNCTION: acpi_os_validate_address 1516 * 1517 * PARAMETERS: space_id - ACPI space ID 1518 * address - Physical address 1519 * length - Address length 1520 * 1521 * RETURN: AE_OK if address/length is valid for the space_id. Otherwise, 1522 * should return AE_AML_ILLEGAL_ADDRESS. 1523 * 1524 * DESCRIPTION: Validate a system address via the host OS. Used to validate 1525 * the addresses accessed by AML operation regions. 1526 * 1527 *****************************************************************************/ 1528 1529 acpi_status 1530 acpi_os_validate_address ( 1531 u8 space_id, 1532 acpi_physical_address address, 1533 acpi_size length, 1534 char *name) 1535 { 1536 struct acpi_res_list *res; 1537 int added; 1538 if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) 1539 return AE_OK; 1540 1541 switch (space_id) { 1542 case ACPI_ADR_SPACE_SYSTEM_IO: 1543 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1544 /* Only interference checks against SystemIO and SystemMemory 1545 are needed */ 1546 res = kzalloc(sizeof(struct acpi_res_list), GFP_KERNEL); 1547 if (!res) 1548 return AE_OK; 1549 /* ACPI names are fixed to 4 bytes, still better use strlcpy */ 1550 strlcpy(res->name, name, 5); 1551 res->start = address; 1552 res->end = address + length - 1; 1553 res->resource_type = space_id; 1554 spin_lock(&acpi_res_lock); 1555 added = acpi_res_list_add(res); 1556 spin_unlock(&acpi_res_lock); 1557 pr_debug("%s %s resource: start: 0x%llx, end: 0x%llx, " 1558 "name: %s\n", added ? "Added" : "Already exist", 1559 (space_id == ACPI_ADR_SPACE_SYSTEM_IO) 1560 ? "SystemIO" : "System Memory", 1561 (unsigned long long)res->start, 1562 (unsigned long long)res->end, 1563 res->name); 1564 if (!added) 1565 kfree(res); 1566 break; 1567 case ACPI_ADR_SPACE_PCI_CONFIG: 1568 case ACPI_ADR_SPACE_EC: 1569 case ACPI_ADR_SPACE_SMBUS: 1570 case ACPI_ADR_SPACE_CMOS: 1571 case ACPI_ADR_SPACE_PCI_BAR_TARGET: 1572 case ACPI_ADR_SPACE_DATA_TABLE: 1573 case ACPI_ADR_SPACE_FIXED_HARDWARE: 1574 break; 1575 } 1576 return AE_OK; 1577 } 1578 #endif 1579 1580 acpi_status __init acpi_os_initialize(void) 1581 { 1582 acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block); 1583 acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block); 1584 acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block); 1585 acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block); 1586 1587 return AE_OK; 1588 } 1589 1590 acpi_status __init acpi_os_initialize1(void) 1591 { 1592 kacpid_wq = create_workqueue("kacpid"); 1593 kacpi_notify_wq = create_workqueue("kacpi_notify"); 1594 kacpi_hotplug_wq = create_workqueue("kacpi_hotplug"); 1595 BUG_ON(!kacpid_wq); 1596 BUG_ON(!kacpi_notify_wq); 1597 BUG_ON(!kacpi_hotplug_wq); 1598 acpi_install_interface_handler(acpi_osi_handler); 1599 acpi_osi_setup_late(); 1600 return AE_OK; 1601 } 1602 1603 acpi_status acpi_os_terminate(void) 1604 { 1605 if (acpi_irq_handler) { 1606 acpi_os_remove_interrupt_handler(acpi_irq_irq, 1607 acpi_irq_handler); 1608 } 1609 1610 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe1_block); 1611 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block); 1612 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block); 1613 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block); 1614 1615 destroy_workqueue(kacpid_wq); 1616 destroy_workqueue(kacpi_notify_wq); 1617 destroy_workqueue(kacpi_hotplug_wq); 1618 1619 return AE_OK; 1620 } 1621