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 u32 dummy; 640 void __iomem *virt_addr; 641 int size = width / 8, unmap = 0; 642 643 rcu_read_lock(); 644 virt_addr = acpi_map_vaddr_lookup(phys_addr, size); 645 rcu_read_unlock(); 646 if (!virt_addr) { 647 virt_addr = acpi_os_ioremap(phys_addr, size); 648 unmap = 1; 649 } 650 if (!value) 651 value = &dummy; 652 653 switch (width) { 654 case 8: 655 *(u8 *) value = readb(virt_addr); 656 break; 657 case 16: 658 *(u16 *) value = readw(virt_addr); 659 break; 660 case 32: 661 *(u32 *) value = readl(virt_addr); 662 break; 663 default: 664 BUG(); 665 } 666 667 if (unmap) 668 iounmap(virt_addr); 669 670 return AE_OK; 671 } 672 673 acpi_status 674 acpi_os_write_memory(acpi_physical_address phys_addr, u32 value, u32 width) 675 { 676 void __iomem *virt_addr; 677 int size = width / 8, unmap = 0; 678 679 rcu_read_lock(); 680 virt_addr = acpi_map_vaddr_lookup(phys_addr, size); 681 rcu_read_unlock(); 682 if (!virt_addr) { 683 virt_addr = acpi_os_ioremap(phys_addr, size); 684 unmap = 1; 685 } 686 687 switch (width) { 688 case 8: 689 writeb(value, virt_addr); 690 break; 691 case 16: 692 writew(value, virt_addr); 693 break; 694 case 32: 695 writel(value, virt_addr); 696 break; 697 default: 698 BUG(); 699 } 700 701 if (unmap) 702 iounmap(virt_addr); 703 704 return AE_OK; 705 } 706 707 acpi_status 708 acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, 709 u64 *value, u32 width) 710 { 711 int result, size; 712 u32 value32; 713 714 if (!value) 715 return AE_BAD_PARAMETER; 716 717 switch (width) { 718 case 8: 719 size = 1; 720 break; 721 case 16: 722 size = 2; 723 break; 724 case 32: 725 size = 4; 726 break; 727 default: 728 return AE_ERROR; 729 } 730 731 result = raw_pci_read(pci_id->segment, pci_id->bus, 732 PCI_DEVFN(pci_id->device, pci_id->function), 733 reg, size, &value32); 734 *value = value32; 735 736 return (result ? AE_ERROR : AE_OK); 737 } 738 739 acpi_status 740 acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, 741 u64 value, u32 width) 742 { 743 int result, size; 744 745 switch (width) { 746 case 8: 747 size = 1; 748 break; 749 case 16: 750 size = 2; 751 break; 752 case 32: 753 size = 4; 754 break; 755 default: 756 return AE_ERROR; 757 } 758 759 result = raw_pci_write(pci_id->segment, pci_id->bus, 760 PCI_DEVFN(pci_id->device, pci_id->function), 761 reg, size, value); 762 763 return (result ? AE_ERROR : AE_OK); 764 } 765 766 static void acpi_os_execute_deferred(struct work_struct *work) 767 { 768 struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work); 769 770 if (dpc->wait) 771 acpi_os_wait_events_complete(NULL); 772 773 dpc->function(dpc->context); 774 kfree(dpc); 775 } 776 777 /******************************************************************************* 778 * 779 * FUNCTION: acpi_os_execute 780 * 781 * PARAMETERS: Type - Type of the callback 782 * Function - Function to be executed 783 * Context - Function parameters 784 * 785 * RETURN: Status 786 * 787 * DESCRIPTION: Depending on type, either queues function for deferred execution or 788 * immediately executes function on a separate thread. 789 * 790 ******************************************************************************/ 791 792 static acpi_status __acpi_os_execute(acpi_execute_type type, 793 acpi_osd_exec_callback function, void *context, int hp) 794 { 795 acpi_status status = AE_OK; 796 struct acpi_os_dpc *dpc; 797 struct workqueue_struct *queue; 798 int ret; 799 ACPI_DEBUG_PRINT((ACPI_DB_EXEC, 800 "Scheduling function [%p(%p)] for deferred execution.\n", 801 function, context)); 802 803 /* 804 * Allocate/initialize DPC structure. Note that this memory will be 805 * freed by the callee. The kernel handles the work_struct list in a 806 * way that allows us to also free its memory inside the callee. 807 * Because we may want to schedule several tasks with different 808 * parameters we can't use the approach some kernel code uses of 809 * having a static work_struct. 810 */ 811 812 dpc = kmalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC); 813 if (!dpc) 814 return AE_NO_MEMORY; 815 816 dpc->function = function; 817 dpc->context = context; 818 819 /* 820 * We can't run hotplug code in keventd_wq/kacpid_wq/kacpid_notify_wq 821 * because the hotplug code may call driver .remove() functions, 822 * which invoke flush_scheduled_work/acpi_os_wait_events_complete 823 * to flush these workqueues. 824 */ 825 queue = hp ? kacpi_hotplug_wq : 826 (type == OSL_NOTIFY_HANDLER ? kacpi_notify_wq : kacpid_wq); 827 dpc->wait = hp ? 1 : 0; 828 829 if (queue == kacpi_hotplug_wq) 830 INIT_WORK(&dpc->work, acpi_os_execute_deferred); 831 else if (queue == kacpi_notify_wq) 832 INIT_WORK(&dpc->work, acpi_os_execute_deferred); 833 else 834 INIT_WORK(&dpc->work, acpi_os_execute_deferred); 835 836 /* 837 * On some machines, a software-initiated SMI causes corruption unless 838 * the SMI runs on CPU 0. An SMI can be initiated by any AML, but 839 * typically it's done in GPE-related methods that are run via 840 * workqueues, so we can avoid the known corruption cases by always 841 * queueing on CPU 0. 842 */ 843 ret = queue_work_on(0, queue, &dpc->work); 844 845 if (!ret) { 846 printk(KERN_ERR PREFIX 847 "Call to queue_work() failed.\n"); 848 status = AE_ERROR; 849 kfree(dpc); 850 } 851 return status; 852 } 853 854 acpi_status acpi_os_execute(acpi_execute_type type, 855 acpi_osd_exec_callback function, void *context) 856 { 857 return __acpi_os_execute(type, function, context, 0); 858 } 859 EXPORT_SYMBOL(acpi_os_execute); 860 861 acpi_status acpi_os_hotplug_execute(acpi_osd_exec_callback function, 862 void *context) 863 { 864 return __acpi_os_execute(0, function, context, 1); 865 } 866 867 void acpi_os_wait_events_complete(void *context) 868 { 869 flush_workqueue(kacpid_wq); 870 flush_workqueue(kacpi_notify_wq); 871 } 872 873 EXPORT_SYMBOL(acpi_os_wait_events_complete); 874 875 /* 876 * Deallocate the memory for a spinlock. 877 */ 878 void acpi_os_delete_lock(acpi_spinlock handle) 879 { 880 return; 881 } 882 883 acpi_status 884 acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle) 885 { 886 struct semaphore *sem = NULL; 887 888 sem = acpi_os_allocate(sizeof(struct semaphore)); 889 if (!sem) 890 return AE_NO_MEMORY; 891 memset(sem, 0, sizeof(struct semaphore)); 892 893 sema_init(sem, initial_units); 894 895 *handle = (acpi_handle *) sem; 896 897 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n", 898 *handle, initial_units)); 899 900 return AE_OK; 901 } 902 903 /* 904 * TODO: A better way to delete semaphores? Linux doesn't have a 905 * 'delete_semaphore()' function -- may result in an invalid 906 * pointer dereference for non-synchronized consumers. Should 907 * we at least check for blocked threads and signal/cancel them? 908 */ 909 910 acpi_status acpi_os_delete_semaphore(acpi_handle handle) 911 { 912 struct semaphore *sem = (struct semaphore *)handle; 913 914 if (!sem) 915 return AE_BAD_PARAMETER; 916 917 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle)); 918 919 BUG_ON(!list_empty(&sem->wait_list)); 920 kfree(sem); 921 sem = NULL; 922 923 return AE_OK; 924 } 925 926 /* 927 * TODO: Support for units > 1? 928 */ 929 acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout) 930 { 931 acpi_status status = AE_OK; 932 struct semaphore *sem = (struct semaphore *)handle; 933 long jiffies; 934 int ret = 0; 935 936 if (!sem || (units < 1)) 937 return AE_BAD_PARAMETER; 938 939 if (units > 1) 940 return AE_SUPPORT; 941 942 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n", 943 handle, units, timeout)); 944 945 if (timeout == ACPI_WAIT_FOREVER) 946 jiffies = MAX_SCHEDULE_TIMEOUT; 947 else 948 jiffies = msecs_to_jiffies(timeout); 949 950 ret = down_timeout(sem, jiffies); 951 if (ret) 952 status = AE_TIME; 953 954 if (ACPI_FAILURE(status)) { 955 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, 956 "Failed to acquire semaphore[%p|%d|%d], %s", 957 handle, units, timeout, 958 acpi_format_exception(status))); 959 } else { 960 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, 961 "Acquired semaphore[%p|%d|%d]", handle, 962 units, timeout)); 963 } 964 965 return status; 966 } 967 968 /* 969 * TODO: Support for units > 1? 970 */ 971 acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units) 972 { 973 struct semaphore *sem = (struct semaphore *)handle; 974 975 if (!sem || (units < 1)) 976 return AE_BAD_PARAMETER; 977 978 if (units > 1) 979 return AE_SUPPORT; 980 981 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle, 982 units)); 983 984 up(sem); 985 986 return AE_OK; 987 } 988 989 #ifdef ACPI_FUTURE_USAGE 990 u32 acpi_os_get_line(char *buffer) 991 { 992 993 #ifdef ENABLE_DEBUGGER 994 if (acpi_in_debugger) { 995 u32 chars; 996 997 kdb_read(buffer, sizeof(line_buf)); 998 999 /* remove the CR kdb includes */ 1000 chars = strlen(buffer) - 1; 1001 buffer[chars] = '\0'; 1002 } 1003 #endif 1004 1005 return 0; 1006 } 1007 #endif /* ACPI_FUTURE_USAGE */ 1008 1009 acpi_status acpi_os_signal(u32 function, void *info) 1010 { 1011 switch (function) { 1012 case ACPI_SIGNAL_FATAL: 1013 printk(KERN_ERR PREFIX "Fatal opcode executed\n"); 1014 break; 1015 case ACPI_SIGNAL_BREAKPOINT: 1016 /* 1017 * AML Breakpoint 1018 * ACPI spec. says to treat it as a NOP unless 1019 * you are debugging. So if/when we integrate 1020 * AML debugger into the kernel debugger its 1021 * hook will go here. But until then it is 1022 * not useful to print anything on breakpoints. 1023 */ 1024 break; 1025 default: 1026 break; 1027 } 1028 1029 return AE_OK; 1030 } 1031 1032 static int __init acpi_os_name_setup(char *str) 1033 { 1034 char *p = acpi_os_name; 1035 int count = ACPI_MAX_OVERRIDE_LEN - 1; 1036 1037 if (!str || !*str) 1038 return 0; 1039 1040 for (; count-- && str && *str; str++) { 1041 if (isalnum(*str) || *str == ' ' || *str == ':') 1042 *p++ = *str; 1043 else if (*str == '\'' || *str == '"') 1044 continue; 1045 else 1046 break; 1047 } 1048 *p = 0; 1049 1050 return 1; 1051 1052 } 1053 1054 __setup("acpi_os_name=", acpi_os_name_setup); 1055 1056 #define OSI_STRING_LENGTH_MAX 64 /* arbitrary */ 1057 #define OSI_STRING_ENTRIES_MAX 16 /* arbitrary */ 1058 1059 struct osi_setup_entry { 1060 char string[OSI_STRING_LENGTH_MAX]; 1061 bool enable; 1062 }; 1063 1064 static struct osi_setup_entry __initdata osi_setup_entries[OSI_STRING_ENTRIES_MAX]; 1065 1066 void __init acpi_osi_setup(char *str) 1067 { 1068 struct osi_setup_entry *osi; 1069 bool enable = true; 1070 int i; 1071 1072 if (!acpi_gbl_create_osi_method) 1073 return; 1074 1075 if (str == NULL || *str == '\0') { 1076 printk(KERN_INFO PREFIX "_OSI method disabled\n"); 1077 acpi_gbl_create_osi_method = FALSE; 1078 return; 1079 } 1080 1081 if (*str == '!') { 1082 str++; 1083 enable = false; 1084 } 1085 1086 for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { 1087 osi = &osi_setup_entries[i]; 1088 if (!strcmp(osi->string, str)) { 1089 osi->enable = enable; 1090 break; 1091 } else if (osi->string[0] == '\0') { 1092 osi->enable = enable; 1093 strncpy(osi->string, str, OSI_STRING_LENGTH_MAX); 1094 break; 1095 } 1096 } 1097 } 1098 1099 static void __init set_osi_linux(unsigned int enable) 1100 { 1101 if (osi_linux.enable != enable) 1102 osi_linux.enable = enable; 1103 1104 if (osi_linux.enable) 1105 acpi_osi_setup("Linux"); 1106 else 1107 acpi_osi_setup("!Linux"); 1108 1109 return; 1110 } 1111 1112 static void __init acpi_cmdline_osi_linux(unsigned int enable) 1113 { 1114 osi_linux.cmdline = 1; /* cmdline set the default and override DMI */ 1115 osi_linux.dmi = 0; 1116 set_osi_linux(enable); 1117 1118 return; 1119 } 1120 1121 void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d) 1122 { 1123 printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident); 1124 1125 if (enable == -1) 1126 return; 1127 1128 osi_linux.dmi = 1; /* DMI knows that this box asks OSI(Linux) */ 1129 set_osi_linux(enable); 1130 1131 return; 1132 } 1133 1134 /* 1135 * Modify the list of "OS Interfaces" reported to BIOS via _OSI 1136 * 1137 * empty string disables _OSI 1138 * string starting with '!' disables that string 1139 * otherwise string is added to list, augmenting built-in strings 1140 */ 1141 static void __init acpi_osi_setup_late(void) 1142 { 1143 struct osi_setup_entry *osi; 1144 char *str; 1145 int i; 1146 acpi_status status; 1147 1148 for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { 1149 osi = &osi_setup_entries[i]; 1150 str = osi->string; 1151 1152 if (*str == '\0') 1153 break; 1154 if (osi->enable) { 1155 status = acpi_install_interface(str); 1156 1157 if (ACPI_SUCCESS(status)) 1158 printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str); 1159 } else { 1160 status = acpi_remove_interface(str); 1161 1162 if (ACPI_SUCCESS(status)) 1163 printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str); 1164 } 1165 } 1166 } 1167 1168 static int __init osi_setup(char *str) 1169 { 1170 if (str && !strcmp("Linux", str)) 1171 acpi_cmdline_osi_linux(1); 1172 else if (str && !strcmp("!Linux", str)) 1173 acpi_cmdline_osi_linux(0); 1174 else 1175 acpi_osi_setup(str); 1176 1177 return 1; 1178 } 1179 1180 __setup("acpi_osi=", osi_setup); 1181 1182 /* enable serialization to combat AE_ALREADY_EXISTS errors */ 1183 static int __init acpi_serialize_setup(char *str) 1184 { 1185 printk(KERN_INFO PREFIX "serialize enabled\n"); 1186 1187 acpi_gbl_all_methods_serialized = TRUE; 1188 1189 return 1; 1190 } 1191 1192 __setup("acpi_serialize", acpi_serialize_setup); 1193 1194 /* Check of resource interference between native drivers and ACPI 1195 * OperationRegions (SystemIO and System Memory only). 1196 * IO ports and memory declared in ACPI might be used by the ACPI subsystem 1197 * in arbitrary AML code and can interfere with legacy drivers. 1198 * acpi_enforce_resources= can be set to: 1199 * 1200 * - strict (default) (2) 1201 * -> further driver trying to access the resources will not load 1202 * - lax (1) 1203 * -> further driver trying to access the resources will load, but you 1204 * get a system message that something might go wrong... 1205 * 1206 * - no (0) 1207 * -> ACPI Operation Region resources will not be registered 1208 * 1209 */ 1210 #define ENFORCE_RESOURCES_STRICT 2 1211 #define ENFORCE_RESOURCES_LAX 1 1212 #define ENFORCE_RESOURCES_NO 0 1213 1214 static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; 1215 1216 static int __init acpi_enforce_resources_setup(char *str) 1217 { 1218 if (str == NULL || *str == '\0') 1219 return 0; 1220 1221 if (!strcmp("strict", str)) 1222 acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; 1223 else if (!strcmp("lax", str)) 1224 acpi_enforce_resources = ENFORCE_RESOURCES_LAX; 1225 else if (!strcmp("no", str)) 1226 acpi_enforce_resources = ENFORCE_RESOURCES_NO; 1227 1228 return 1; 1229 } 1230 1231 __setup("acpi_enforce_resources=", acpi_enforce_resources_setup); 1232 1233 /* Check for resource conflicts between ACPI OperationRegions and native 1234 * drivers */ 1235 int acpi_check_resource_conflict(const struct resource *res) 1236 { 1237 struct acpi_res_list *res_list_elem; 1238 int ioport = 0, clash = 0; 1239 1240 if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) 1241 return 0; 1242 if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM)) 1243 return 0; 1244 1245 ioport = res->flags & IORESOURCE_IO; 1246 1247 spin_lock(&acpi_res_lock); 1248 list_for_each_entry(res_list_elem, &resource_list_head, 1249 resource_list) { 1250 if (ioport && (res_list_elem->resource_type 1251 != ACPI_ADR_SPACE_SYSTEM_IO)) 1252 continue; 1253 if (!ioport && (res_list_elem->resource_type 1254 != ACPI_ADR_SPACE_SYSTEM_MEMORY)) 1255 continue; 1256 1257 if (res->end < res_list_elem->start 1258 || res_list_elem->end < res->start) 1259 continue; 1260 clash = 1; 1261 break; 1262 } 1263 spin_unlock(&acpi_res_lock); 1264 1265 if (clash) { 1266 if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) { 1267 printk(KERN_WARNING "ACPI: resource %s %pR" 1268 " conflicts with ACPI region %s " 1269 "[%s 0x%zx-0x%zx]\n", 1270 res->name, res, res_list_elem->name, 1271 (res_list_elem->resource_type == 1272 ACPI_ADR_SPACE_SYSTEM_IO) ? "io" : "mem", 1273 (size_t) res_list_elem->start, 1274 (size_t) res_list_elem->end); 1275 if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX) 1276 printk(KERN_NOTICE "ACPI: This conflict may" 1277 " cause random problems and system" 1278 " instability\n"); 1279 printk(KERN_INFO "ACPI: If an ACPI driver is available" 1280 " for this device, you should use it instead of" 1281 " the native driver\n"); 1282 } 1283 if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT) 1284 return -EBUSY; 1285 } 1286 return 0; 1287 } 1288 EXPORT_SYMBOL(acpi_check_resource_conflict); 1289 1290 int acpi_check_region(resource_size_t start, resource_size_t n, 1291 const char *name) 1292 { 1293 struct resource res = { 1294 .start = start, 1295 .end = start + n - 1, 1296 .name = name, 1297 .flags = IORESOURCE_IO, 1298 }; 1299 1300 return acpi_check_resource_conflict(&res); 1301 } 1302 EXPORT_SYMBOL(acpi_check_region); 1303 1304 /* 1305 * Let drivers know whether the resource checks are effective 1306 */ 1307 int acpi_resources_are_enforced(void) 1308 { 1309 return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT; 1310 } 1311 EXPORT_SYMBOL(acpi_resources_are_enforced); 1312 1313 /* 1314 * Acquire a spinlock. 1315 * 1316 * handle is a pointer to the spinlock_t. 1317 */ 1318 1319 acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp) 1320 { 1321 acpi_cpu_flags flags; 1322 spin_lock_irqsave(lockp, flags); 1323 return flags; 1324 } 1325 1326 /* 1327 * Release a spinlock. See above. 1328 */ 1329 1330 void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags) 1331 { 1332 spin_unlock_irqrestore(lockp, flags); 1333 } 1334 1335 #ifndef ACPI_USE_LOCAL_CACHE 1336 1337 /******************************************************************************* 1338 * 1339 * FUNCTION: acpi_os_create_cache 1340 * 1341 * PARAMETERS: name - Ascii name for the cache 1342 * size - Size of each cached object 1343 * depth - Maximum depth of the cache (in objects) <ignored> 1344 * cache - Where the new cache object is returned 1345 * 1346 * RETURN: status 1347 * 1348 * DESCRIPTION: Create a cache object 1349 * 1350 ******************************************************************************/ 1351 1352 acpi_status 1353 acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache) 1354 { 1355 *cache = kmem_cache_create(name, size, 0, 0, NULL); 1356 if (*cache == NULL) 1357 return AE_ERROR; 1358 else 1359 return AE_OK; 1360 } 1361 1362 /******************************************************************************* 1363 * 1364 * FUNCTION: acpi_os_purge_cache 1365 * 1366 * PARAMETERS: Cache - Handle to cache object 1367 * 1368 * RETURN: Status 1369 * 1370 * DESCRIPTION: Free all objects within the requested cache. 1371 * 1372 ******************************************************************************/ 1373 1374 acpi_status acpi_os_purge_cache(acpi_cache_t * cache) 1375 { 1376 kmem_cache_shrink(cache); 1377 return (AE_OK); 1378 } 1379 1380 /******************************************************************************* 1381 * 1382 * FUNCTION: acpi_os_delete_cache 1383 * 1384 * PARAMETERS: Cache - Handle to cache object 1385 * 1386 * RETURN: Status 1387 * 1388 * DESCRIPTION: Free all objects within the requested cache and delete the 1389 * cache object. 1390 * 1391 ******************************************************************************/ 1392 1393 acpi_status acpi_os_delete_cache(acpi_cache_t * cache) 1394 { 1395 kmem_cache_destroy(cache); 1396 return (AE_OK); 1397 } 1398 1399 /******************************************************************************* 1400 * 1401 * FUNCTION: acpi_os_release_object 1402 * 1403 * PARAMETERS: Cache - Handle to cache object 1404 * Object - The object to be released 1405 * 1406 * RETURN: None 1407 * 1408 * DESCRIPTION: Release an object to the specified cache. If cache is full, 1409 * the object is deleted. 1410 * 1411 ******************************************************************************/ 1412 1413 acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object) 1414 { 1415 kmem_cache_free(cache, object); 1416 return (AE_OK); 1417 } 1418 1419 static inline int acpi_res_list_add(struct acpi_res_list *res) 1420 { 1421 struct acpi_res_list *res_list_elem; 1422 1423 list_for_each_entry(res_list_elem, &resource_list_head, 1424 resource_list) { 1425 1426 if (res->resource_type == res_list_elem->resource_type && 1427 res->start == res_list_elem->start && 1428 res->end == res_list_elem->end) { 1429 1430 /* 1431 * The Region(addr,len) already exist in the list, 1432 * just increase the count 1433 */ 1434 1435 res_list_elem->count++; 1436 return 0; 1437 } 1438 } 1439 1440 res->count = 1; 1441 list_add(&res->resource_list, &resource_list_head); 1442 return 1; 1443 } 1444 1445 static inline void acpi_res_list_del(struct acpi_res_list *res) 1446 { 1447 struct acpi_res_list *res_list_elem; 1448 1449 list_for_each_entry(res_list_elem, &resource_list_head, 1450 resource_list) { 1451 1452 if (res->resource_type == res_list_elem->resource_type && 1453 res->start == res_list_elem->start && 1454 res->end == res_list_elem->end) { 1455 1456 /* 1457 * If the res count is decreased to 0, 1458 * remove and free it 1459 */ 1460 1461 if (--res_list_elem->count == 0) { 1462 list_del(&res_list_elem->resource_list); 1463 kfree(res_list_elem); 1464 } 1465 return; 1466 } 1467 } 1468 } 1469 1470 acpi_status 1471 acpi_os_invalidate_address( 1472 u8 space_id, 1473 acpi_physical_address address, 1474 acpi_size length) 1475 { 1476 struct acpi_res_list res; 1477 1478 switch (space_id) { 1479 case ACPI_ADR_SPACE_SYSTEM_IO: 1480 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1481 /* Only interference checks against SystemIO and SystemMemory 1482 are needed */ 1483 res.start = address; 1484 res.end = address + length - 1; 1485 res.resource_type = space_id; 1486 spin_lock(&acpi_res_lock); 1487 acpi_res_list_del(&res); 1488 spin_unlock(&acpi_res_lock); 1489 break; 1490 case ACPI_ADR_SPACE_PCI_CONFIG: 1491 case ACPI_ADR_SPACE_EC: 1492 case ACPI_ADR_SPACE_SMBUS: 1493 case ACPI_ADR_SPACE_CMOS: 1494 case ACPI_ADR_SPACE_PCI_BAR_TARGET: 1495 case ACPI_ADR_SPACE_DATA_TABLE: 1496 case ACPI_ADR_SPACE_FIXED_HARDWARE: 1497 break; 1498 } 1499 return AE_OK; 1500 } 1501 1502 /****************************************************************************** 1503 * 1504 * FUNCTION: acpi_os_validate_address 1505 * 1506 * PARAMETERS: space_id - ACPI space ID 1507 * address - Physical address 1508 * length - Address length 1509 * 1510 * RETURN: AE_OK if address/length is valid for the space_id. Otherwise, 1511 * should return AE_AML_ILLEGAL_ADDRESS. 1512 * 1513 * DESCRIPTION: Validate a system address via the host OS. Used to validate 1514 * the addresses accessed by AML operation regions. 1515 * 1516 *****************************************************************************/ 1517 1518 acpi_status 1519 acpi_os_validate_address ( 1520 u8 space_id, 1521 acpi_physical_address address, 1522 acpi_size length, 1523 char *name) 1524 { 1525 struct acpi_res_list *res; 1526 int added; 1527 if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) 1528 return AE_OK; 1529 1530 switch (space_id) { 1531 case ACPI_ADR_SPACE_SYSTEM_IO: 1532 case ACPI_ADR_SPACE_SYSTEM_MEMORY: 1533 /* Only interference checks against SystemIO and SystemMemory 1534 are needed */ 1535 res = kzalloc(sizeof(struct acpi_res_list), GFP_KERNEL); 1536 if (!res) 1537 return AE_OK; 1538 /* ACPI names are fixed to 4 bytes, still better use strlcpy */ 1539 strlcpy(res->name, name, 5); 1540 res->start = address; 1541 res->end = address + length - 1; 1542 res->resource_type = space_id; 1543 spin_lock(&acpi_res_lock); 1544 added = acpi_res_list_add(res); 1545 spin_unlock(&acpi_res_lock); 1546 pr_debug("%s %s resource: start: 0x%llx, end: 0x%llx, " 1547 "name: %s\n", added ? "Added" : "Already exist", 1548 (space_id == ACPI_ADR_SPACE_SYSTEM_IO) 1549 ? "SystemIO" : "System Memory", 1550 (unsigned long long)res->start, 1551 (unsigned long long)res->end, 1552 res->name); 1553 if (!added) 1554 kfree(res); 1555 break; 1556 case ACPI_ADR_SPACE_PCI_CONFIG: 1557 case ACPI_ADR_SPACE_EC: 1558 case ACPI_ADR_SPACE_SMBUS: 1559 case ACPI_ADR_SPACE_CMOS: 1560 case ACPI_ADR_SPACE_PCI_BAR_TARGET: 1561 case ACPI_ADR_SPACE_DATA_TABLE: 1562 case ACPI_ADR_SPACE_FIXED_HARDWARE: 1563 break; 1564 } 1565 return AE_OK; 1566 } 1567 #endif 1568 1569 acpi_status __init acpi_os_initialize(void) 1570 { 1571 acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block); 1572 acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block); 1573 acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block); 1574 acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block); 1575 1576 return AE_OK; 1577 } 1578 1579 acpi_status __init acpi_os_initialize1(void) 1580 { 1581 kacpid_wq = create_workqueue("kacpid"); 1582 kacpi_notify_wq = create_workqueue("kacpi_notify"); 1583 kacpi_hotplug_wq = create_workqueue("kacpi_hotplug"); 1584 BUG_ON(!kacpid_wq); 1585 BUG_ON(!kacpi_notify_wq); 1586 BUG_ON(!kacpi_hotplug_wq); 1587 acpi_install_interface_handler(acpi_osi_handler); 1588 acpi_osi_setup_late(); 1589 return AE_OK; 1590 } 1591 1592 acpi_status acpi_os_terminate(void) 1593 { 1594 if (acpi_irq_handler) { 1595 acpi_os_remove_interrupt_handler(acpi_irq_irq, 1596 acpi_irq_handler); 1597 } 1598 1599 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe1_block); 1600 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block); 1601 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block); 1602 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block); 1603 1604 destroy_workqueue(kacpid_wq); 1605 destroy_workqueue(kacpi_notify_wq); 1606 destroy_workqueue(kacpi_hotplug_wq); 1607 1608 return AE_OK; 1609 } 1610