| 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/highmem.h> |
| 35 | #include <linux/pci.h> |
| 36 | #include <linux/interrupt.h> |
| 37 | #include <linux/kmod.h> |
| 38 | #include <linux/delay.h> |
| 39 | #include <linux/workqueue.h> |
| 40 | #include <linux/nmi.h> |
| 41 | #include <linux/acpi.h> |
| 42 | #include <linux/acpi_io.h> |
| 43 | #include <linux/efi.h> |
| 44 | #include <linux/ioport.h> |
| 45 | #include <linux/list.h> |
| 46 | #include <linux/jiffies.h> |
| 47 | #include <linux/semaphore.h> |
| 48 | |
| 49 | #include <asm/io.h> |
| 50 | #include <asm/uaccess.h> |
| 51 | |
| 52 | #include <acpi/acpi.h> |
| 53 | #include <acpi/acpi_bus.h> |
| 54 | #include <acpi/processor.h> |
| 55 | #include "internal.h" |
| 56 | |
| 57 | #define _COMPONENT ACPI_OS_SERVICES |
| 58 | ACPI_MODULE_NAME("osl"); |
| 59 | #define PREFIX "ACPI: " |
| 60 | struct acpi_os_dpc { |
| 61 | acpi_osd_exec_callback function; |
| 62 | void *context; |
| 63 | struct work_struct work; |
| 64 | int wait; |
| 65 | }; |
| 66 | |
| 67 | #ifdef CONFIG_ACPI_CUSTOM_DSDT |
| 68 | #include CONFIG_ACPI_CUSTOM_DSDT_FILE |
| 69 | #endif |
| 70 | |
| 71 | #ifdef ENABLE_DEBUGGER |
| 72 | #include <linux/kdb.h> |
| 73 | |
| 74 | /* stuff for debugger support */ |
| 75 | int acpi_in_debugger; |
| 76 | EXPORT_SYMBOL(acpi_in_debugger); |
| 77 | |
| 78 | extern char line_buf[80]; |
| 79 | #endif /*ENABLE_DEBUGGER */ |
| 80 | |
| 81 | static int (*__acpi_os_prepare_sleep)(u8 sleep_state, u32 pm1a_ctrl, |
| 82 | u32 pm1b_ctrl); |
| 83 | static int (*__acpi_os_prepare_extended_sleep)(u8 sleep_state, u32 val_a, |
| 84 | u32 val_b); |
| 85 | |
| 86 | static acpi_osd_handler acpi_irq_handler; |
| 87 | static void *acpi_irq_context; |
| 88 | static struct workqueue_struct *kacpid_wq; |
| 89 | static struct workqueue_struct *kacpi_notify_wq; |
| 90 | static struct workqueue_struct *kacpi_hotplug_wq; |
| 91 | |
| 92 | /* |
| 93 | * This list of permanent mappings is for memory that may be accessed from |
| 94 | * interrupt context, where we can't do the ioremap(). |
| 95 | */ |
| 96 | struct acpi_ioremap { |
| 97 | struct list_head list; |
| 98 | void __iomem *virt; |
| 99 | acpi_physical_address phys; |
| 100 | acpi_size size; |
| 101 | unsigned long refcount; |
| 102 | }; |
| 103 | |
| 104 | static LIST_HEAD(acpi_ioremaps); |
| 105 | static DEFINE_MUTEX(acpi_ioremap_lock); |
| 106 | |
| 107 | static void __init acpi_osi_setup_late(void); |
| 108 | |
| 109 | /* |
| 110 | * The story of _OSI(Linux) |
| 111 | * |
| 112 | * From pre-history through Linux-2.6.22, |
| 113 | * Linux responded TRUE upon a BIOS OSI(Linux) query. |
| 114 | * |
| 115 | * Unfortunately, reference BIOS writers got wind of this |
| 116 | * and put OSI(Linux) in their example code, quickly exposing |
| 117 | * this string as ill-conceived and opening the door to |
| 118 | * an un-bounded number of BIOS incompatibilities. |
| 119 | * |
| 120 | * For example, OSI(Linux) was used on resume to re-POST a |
| 121 | * video card on one system, because Linux at that time |
| 122 | * could not do a speedy restore in its native driver. |
| 123 | * But then upon gaining quick native restore capability, |
| 124 | * Linux has no way to tell the BIOS to skip the time-consuming |
| 125 | * POST -- putting Linux at a permanent performance disadvantage. |
| 126 | * On another system, the BIOS writer used OSI(Linux) |
| 127 | * to infer native OS support for IPMI! On other systems, |
| 128 | * OSI(Linux) simply got in the way of Linux claiming to |
| 129 | * be compatible with other operating systems, exposing |
| 130 | * BIOS issues such as skipped device initialization. |
| 131 | * |
| 132 | * So "Linux" turned out to be a really poor chose of |
| 133 | * OSI string, and from Linux-2.6.23 onward we respond FALSE. |
| 134 | * |
| 135 | * BIOS writers should NOT query _OSI(Linux) on future systems. |
| 136 | * Linux will complain on the console when it sees it, and return FALSE. |
| 137 | * To get Linux to return TRUE for your system will require |
| 138 | * a kernel source update to add a DMI entry, |
| 139 | * or boot with "acpi_osi=Linux" |
| 140 | */ |
| 141 | |
| 142 | static struct osi_linux { |
| 143 | unsigned int enable:1; |
| 144 | unsigned int dmi:1; |
| 145 | unsigned int cmdline:1; |
| 146 | unsigned int default_disabling:1; |
| 147 | } osi_linux = {0, 0, 0, 0}; |
| 148 | |
| 149 | static u32 acpi_osi_handler(acpi_string interface, u32 supported) |
| 150 | { |
| 151 | if (!strcmp("Linux", interface)) { |
| 152 | |
| 153 | printk_once(KERN_NOTICE FW_BUG PREFIX |
| 154 | "BIOS _OSI(Linux) query %s%s\n", |
| 155 | osi_linux.enable ? "honored" : "ignored", |
| 156 | osi_linux.cmdline ? " via cmdline" : |
| 157 | osi_linux.dmi ? " via DMI" : ""); |
| 158 | } |
| 159 | |
| 160 | return supported; |
| 161 | } |
| 162 | |
| 163 | static void __init acpi_request_region (struct acpi_generic_address *gas, |
| 164 | unsigned int length, char *desc) |
| 165 | { |
| 166 | u64 addr; |
| 167 | |
| 168 | /* Handle possible alignment issues */ |
| 169 | memcpy(&addr, &gas->address, sizeof(addr)); |
| 170 | if (!addr || !length) |
| 171 | return; |
| 172 | |
| 173 | /* Resources are never freed */ |
| 174 | if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_IO) |
| 175 | request_region(addr, length, desc); |
| 176 | else if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) |
| 177 | request_mem_region(addr, length, desc); |
| 178 | } |
| 179 | |
| 180 | static int __init acpi_reserve_resources(void) |
| 181 | { |
| 182 | acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length, |
| 183 | "ACPI PM1a_EVT_BLK"); |
| 184 | |
| 185 | acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length, |
| 186 | "ACPI PM1b_EVT_BLK"); |
| 187 | |
| 188 | acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length, |
| 189 | "ACPI PM1a_CNT_BLK"); |
| 190 | |
| 191 | acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length, |
| 192 | "ACPI PM1b_CNT_BLK"); |
| 193 | |
| 194 | if (acpi_gbl_FADT.pm_timer_length == 4) |
| 195 | acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR"); |
| 196 | |
| 197 | acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length, |
| 198 | "ACPI PM2_CNT_BLK"); |
| 199 | |
| 200 | /* Length of GPE blocks must be a non-negative multiple of 2 */ |
| 201 | |
| 202 | if (!(acpi_gbl_FADT.gpe0_block_length & 0x1)) |
| 203 | acpi_request_region(&acpi_gbl_FADT.xgpe0_block, |
| 204 | acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK"); |
| 205 | |
| 206 | if (!(acpi_gbl_FADT.gpe1_block_length & 0x1)) |
| 207 | acpi_request_region(&acpi_gbl_FADT.xgpe1_block, |
| 208 | acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK"); |
| 209 | |
| 210 | return 0; |
| 211 | } |
| 212 | device_initcall(acpi_reserve_resources); |
| 213 | |
| 214 | void acpi_os_printf(const char *fmt, ...) |
| 215 | { |
| 216 | va_list args; |
| 217 | va_start(args, fmt); |
| 218 | acpi_os_vprintf(fmt, args); |
| 219 | va_end(args); |
| 220 | } |
| 221 | |
| 222 | void acpi_os_vprintf(const char *fmt, va_list args) |
| 223 | { |
| 224 | static char buffer[512]; |
| 225 | |
| 226 | vsprintf(buffer, fmt, args); |
| 227 | |
| 228 | #ifdef ENABLE_DEBUGGER |
| 229 | if (acpi_in_debugger) { |
| 230 | kdb_printf("%s", buffer); |
| 231 | } else { |
| 232 | printk(KERN_CONT "%s", buffer); |
| 233 | } |
| 234 | #else |
| 235 | printk(KERN_CONT "%s", buffer); |
| 236 | #endif |
| 237 | } |
| 238 | |
| 239 | #ifdef CONFIG_KEXEC |
| 240 | static unsigned long acpi_rsdp; |
| 241 | static int __init setup_acpi_rsdp(char *arg) |
| 242 | { |
| 243 | acpi_rsdp = simple_strtoul(arg, NULL, 16); |
| 244 | return 0; |
| 245 | } |
| 246 | early_param("acpi_rsdp", setup_acpi_rsdp); |
| 247 | #endif |
| 248 | |
| 249 | acpi_physical_address __init acpi_os_get_root_pointer(void) |
| 250 | { |
| 251 | #ifdef CONFIG_KEXEC |
| 252 | if (acpi_rsdp) |
| 253 | return acpi_rsdp; |
| 254 | #endif |
| 255 | |
| 256 | if (efi_enabled(EFI_CONFIG_TABLES)) { |
| 257 | if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) |
| 258 | return efi.acpi20; |
| 259 | else if (efi.acpi != EFI_INVALID_TABLE_ADDR) |
| 260 | return efi.acpi; |
| 261 | else { |
| 262 | printk(KERN_ERR PREFIX |
| 263 | "System description tables not found\n"); |
| 264 | return 0; |
| 265 | } |
| 266 | } else { |
| 267 | acpi_physical_address pa = 0; |
| 268 | |
| 269 | acpi_find_root_pointer(&pa); |
| 270 | return pa; |
| 271 | } |
| 272 | } |
| 273 | |
| 274 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ |
| 275 | static struct acpi_ioremap * |
| 276 | acpi_map_lookup(acpi_physical_address phys, acpi_size size) |
| 277 | { |
| 278 | struct acpi_ioremap *map; |
| 279 | |
| 280 | list_for_each_entry_rcu(map, &acpi_ioremaps, list) |
| 281 | if (map->phys <= phys && |
| 282 | phys + size <= map->phys + map->size) |
| 283 | return map; |
| 284 | |
| 285 | return NULL; |
| 286 | } |
| 287 | |
| 288 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ |
| 289 | static void __iomem * |
| 290 | acpi_map_vaddr_lookup(acpi_physical_address phys, unsigned int size) |
| 291 | { |
| 292 | struct acpi_ioremap *map; |
| 293 | |
| 294 | map = acpi_map_lookup(phys, size); |
| 295 | if (map) |
| 296 | return map->virt + (phys - map->phys); |
| 297 | |
| 298 | return NULL; |
| 299 | } |
| 300 | |
| 301 | void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size) |
| 302 | { |
| 303 | struct acpi_ioremap *map; |
| 304 | void __iomem *virt = NULL; |
| 305 | |
| 306 | mutex_lock(&acpi_ioremap_lock); |
| 307 | map = acpi_map_lookup(phys, size); |
| 308 | if (map) { |
| 309 | virt = map->virt + (phys - map->phys); |
| 310 | map->refcount++; |
| 311 | } |
| 312 | mutex_unlock(&acpi_ioremap_lock); |
| 313 | return virt; |
| 314 | } |
| 315 | EXPORT_SYMBOL_GPL(acpi_os_get_iomem); |
| 316 | |
| 317 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ |
| 318 | static struct acpi_ioremap * |
| 319 | acpi_map_lookup_virt(void __iomem *virt, acpi_size size) |
| 320 | { |
| 321 | struct acpi_ioremap *map; |
| 322 | |
| 323 | list_for_each_entry_rcu(map, &acpi_ioremaps, list) |
| 324 | if (map->virt <= virt && |
| 325 | virt + size <= map->virt + map->size) |
| 326 | return map; |
| 327 | |
| 328 | return NULL; |
| 329 | } |
| 330 | |
| 331 | #ifndef CONFIG_IA64 |
| 332 | #define should_use_kmap(pfn) page_is_ram(pfn) |
| 333 | #else |
| 334 | /* ioremap will take care of cache attributes */ |
| 335 | #define should_use_kmap(pfn) 0 |
| 336 | #endif |
| 337 | |
| 338 | static void __iomem *acpi_map(acpi_physical_address pg_off, unsigned long pg_sz) |
| 339 | { |
| 340 | unsigned long pfn; |
| 341 | |
| 342 | pfn = pg_off >> PAGE_SHIFT; |
| 343 | if (should_use_kmap(pfn)) { |
| 344 | if (pg_sz > PAGE_SIZE) |
| 345 | return NULL; |
| 346 | return (void __iomem __force *)kmap(pfn_to_page(pfn)); |
| 347 | } else |
| 348 | return acpi_os_ioremap(pg_off, pg_sz); |
| 349 | } |
| 350 | |
| 351 | static void acpi_unmap(acpi_physical_address pg_off, void __iomem *vaddr) |
| 352 | { |
| 353 | unsigned long pfn; |
| 354 | |
| 355 | pfn = pg_off >> PAGE_SHIFT; |
| 356 | if (should_use_kmap(pfn)) |
| 357 | kunmap(pfn_to_page(pfn)); |
| 358 | else |
| 359 | iounmap(vaddr); |
| 360 | } |
| 361 | |
| 362 | void __iomem *__init_refok |
| 363 | acpi_os_map_memory(acpi_physical_address phys, acpi_size size) |
| 364 | { |
| 365 | struct acpi_ioremap *map; |
| 366 | void __iomem *virt; |
| 367 | acpi_physical_address pg_off; |
| 368 | acpi_size pg_sz; |
| 369 | |
| 370 | if (phys > ULONG_MAX) { |
| 371 | printk(KERN_ERR PREFIX "Cannot map memory that high\n"); |
| 372 | return NULL; |
| 373 | } |
| 374 | |
| 375 | if (!acpi_gbl_permanent_mmap) |
| 376 | return __acpi_map_table((unsigned long)phys, size); |
| 377 | |
| 378 | mutex_lock(&acpi_ioremap_lock); |
| 379 | /* Check if there's a suitable mapping already. */ |
| 380 | map = acpi_map_lookup(phys, size); |
| 381 | if (map) { |
| 382 | map->refcount++; |
| 383 | goto out; |
| 384 | } |
| 385 | |
| 386 | map = kzalloc(sizeof(*map), GFP_KERNEL); |
| 387 | if (!map) { |
| 388 | mutex_unlock(&acpi_ioremap_lock); |
| 389 | return NULL; |
| 390 | } |
| 391 | |
| 392 | pg_off = round_down(phys, PAGE_SIZE); |
| 393 | pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off; |
| 394 | virt = acpi_map(pg_off, pg_sz); |
| 395 | if (!virt) { |
| 396 | mutex_unlock(&acpi_ioremap_lock); |
| 397 | kfree(map); |
| 398 | return NULL; |
| 399 | } |
| 400 | |
| 401 | INIT_LIST_HEAD(&map->list); |
| 402 | map->virt = virt; |
| 403 | map->phys = pg_off; |
| 404 | map->size = pg_sz; |
| 405 | map->refcount = 1; |
| 406 | |
| 407 | list_add_tail_rcu(&map->list, &acpi_ioremaps); |
| 408 | |
| 409 | out: |
| 410 | mutex_unlock(&acpi_ioremap_lock); |
| 411 | return map->virt + (phys - map->phys); |
| 412 | } |
| 413 | EXPORT_SYMBOL_GPL(acpi_os_map_memory); |
| 414 | |
| 415 | static void acpi_os_drop_map_ref(struct acpi_ioremap *map) |
| 416 | { |
| 417 | if (!--map->refcount) |
| 418 | list_del_rcu(&map->list); |
| 419 | } |
| 420 | |
| 421 | static void acpi_os_map_cleanup(struct acpi_ioremap *map) |
| 422 | { |
| 423 | if (!map->refcount) { |
| 424 | synchronize_rcu(); |
| 425 | acpi_unmap(map->phys, map->virt); |
| 426 | kfree(map); |
| 427 | } |
| 428 | } |
| 429 | |
| 430 | void __ref acpi_os_unmap_memory(void __iomem *virt, acpi_size size) |
| 431 | { |
| 432 | struct acpi_ioremap *map; |
| 433 | |
| 434 | if (!acpi_gbl_permanent_mmap) { |
| 435 | __acpi_unmap_table(virt, size); |
| 436 | return; |
| 437 | } |
| 438 | |
| 439 | mutex_lock(&acpi_ioremap_lock); |
| 440 | map = acpi_map_lookup_virt(virt, size); |
| 441 | if (!map) { |
| 442 | mutex_unlock(&acpi_ioremap_lock); |
| 443 | WARN(true, PREFIX "%s: bad address %p\n", __func__, virt); |
| 444 | return; |
| 445 | } |
| 446 | acpi_os_drop_map_ref(map); |
| 447 | mutex_unlock(&acpi_ioremap_lock); |
| 448 | |
| 449 | acpi_os_map_cleanup(map); |
| 450 | } |
| 451 | EXPORT_SYMBOL_GPL(acpi_os_unmap_memory); |
| 452 | |
| 453 | void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size) |
| 454 | { |
| 455 | if (!acpi_gbl_permanent_mmap) |
| 456 | __acpi_unmap_table(virt, size); |
| 457 | } |
| 458 | |
| 459 | int acpi_os_map_generic_address(struct acpi_generic_address *gas) |
| 460 | { |
| 461 | u64 addr; |
| 462 | void __iomem *virt; |
| 463 | |
| 464 | if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) |
| 465 | return 0; |
| 466 | |
| 467 | /* Handle possible alignment issues */ |
| 468 | memcpy(&addr, &gas->address, sizeof(addr)); |
| 469 | if (!addr || !gas->bit_width) |
| 470 | return -EINVAL; |
| 471 | |
| 472 | virt = acpi_os_map_memory(addr, gas->bit_width / 8); |
| 473 | if (!virt) |
| 474 | return -EIO; |
| 475 | |
| 476 | return 0; |
| 477 | } |
| 478 | EXPORT_SYMBOL(acpi_os_map_generic_address); |
| 479 | |
| 480 | void acpi_os_unmap_generic_address(struct acpi_generic_address *gas) |
| 481 | { |
| 482 | u64 addr; |
| 483 | struct acpi_ioremap *map; |
| 484 | |
| 485 | if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) |
| 486 | return; |
| 487 | |
| 488 | /* Handle possible alignment issues */ |
| 489 | memcpy(&addr, &gas->address, sizeof(addr)); |
| 490 | if (!addr || !gas->bit_width) |
| 491 | return; |
| 492 | |
| 493 | mutex_lock(&acpi_ioremap_lock); |
| 494 | map = acpi_map_lookup(addr, gas->bit_width / 8); |
| 495 | if (!map) { |
| 496 | mutex_unlock(&acpi_ioremap_lock); |
| 497 | return; |
| 498 | } |
| 499 | acpi_os_drop_map_ref(map); |
| 500 | mutex_unlock(&acpi_ioremap_lock); |
| 501 | |
| 502 | acpi_os_map_cleanup(map); |
| 503 | } |
| 504 | EXPORT_SYMBOL(acpi_os_unmap_generic_address); |
| 505 | |
| 506 | #ifdef ACPI_FUTURE_USAGE |
| 507 | acpi_status |
| 508 | acpi_os_get_physical_address(void *virt, acpi_physical_address * phys) |
| 509 | { |
| 510 | if (!phys || !virt) |
| 511 | return AE_BAD_PARAMETER; |
| 512 | |
| 513 | *phys = virt_to_phys(virt); |
| 514 | |
| 515 | return AE_OK; |
| 516 | } |
| 517 | #endif |
| 518 | |
| 519 | #define ACPI_MAX_OVERRIDE_LEN 100 |
| 520 | |
| 521 | static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN]; |
| 522 | |
| 523 | acpi_status |
| 524 | acpi_os_predefined_override(const struct acpi_predefined_names *init_val, |
| 525 | acpi_string * new_val) |
| 526 | { |
| 527 | if (!init_val || !new_val) |
| 528 | return AE_BAD_PARAMETER; |
| 529 | |
| 530 | *new_val = NULL; |
| 531 | if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) { |
| 532 | printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n", |
| 533 | acpi_os_name); |
| 534 | *new_val = acpi_os_name; |
| 535 | } |
| 536 | |
| 537 | return AE_OK; |
| 538 | } |
| 539 | |
| 540 | #ifdef CONFIG_ACPI_INITRD_TABLE_OVERRIDE |
| 541 | #include <linux/earlycpio.h> |
| 542 | #include <linux/memblock.h> |
| 543 | |
| 544 | static u64 acpi_tables_addr; |
| 545 | static int all_tables_size; |
| 546 | |
| 547 | /* Copied from acpica/tbutils.c:acpi_tb_checksum() */ |
| 548 | u8 __init acpi_table_checksum(u8 *buffer, u32 length) |
| 549 | { |
| 550 | u8 sum = 0; |
| 551 | u8 *end = buffer + length; |
| 552 | |
| 553 | while (buffer < end) |
| 554 | sum = (u8) (sum + *(buffer++)); |
| 555 | return sum; |
| 556 | } |
| 557 | |
| 558 | /* All but ACPI_SIG_RSDP and ACPI_SIG_FACS: */ |
| 559 | static const char * const table_sigs[] = { |
| 560 | ACPI_SIG_BERT, ACPI_SIG_CPEP, ACPI_SIG_ECDT, ACPI_SIG_EINJ, |
| 561 | ACPI_SIG_ERST, ACPI_SIG_HEST, ACPI_SIG_MADT, ACPI_SIG_MSCT, |
| 562 | ACPI_SIG_SBST, ACPI_SIG_SLIT, ACPI_SIG_SRAT, ACPI_SIG_ASF, |
| 563 | ACPI_SIG_BOOT, ACPI_SIG_DBGP, ACPI_SIG_DMAR, ACPI_SIG_HPET, |
| 564 | ACPI_SIG_IBFT, ACPI_SIG_IVRS, ACPI_SIG_MCFG, ACPI_SIG_MCHI, |
| 565 | ACPI_SIG_SLIC, ACPI_SIG_SPCR, ACPI_SIG_SPMI, ACPI_SIG_TCPA, |
| 566 | ACPI_SIG_UEFI, ACPI_SIG_WAET, ACPI_SIG_WDAT, ACPI_SIG_WDDT, |
| 567 | ACPI_SIG_WDRT, ACPI_SIG_DSDT, ACPI_SIG_FADT, ACPI_SIG_PSDT, |
| 568 | ACPI_SIG_RSDT, ACPI_SIG_XSDT, ACPI_SIG_SSDT, NULL }; |
| 569 | |
| 570 | #define ACPI_HEADER_SIZE sizeof(struct acpi_table_header) |
| 571 | |
| 572 | /* Must not increase 10 or needs code modification below */ |
| 573 | #define ACPI_OVERRIDE_TABLES 10 |
| 574 | |
| 575 | void __init acpi_initrd_override(void *data, size_t size) |
| 576 | { |
| 577 | int sig, no, table_nr = 0, total_offset = 0; |
| 578 | long offset = 0; |
| 579 | struct acpi_table_header *table; |
| 580 | char cpio_path[32] = "kernel/firmware/acpi/"; |
| 581 | struct cpio_data file; |
| 582 | struct cpio_data early_initrd_files[ACPI_OVERRIDE_TABLES]; |
| 583 | char *p; |
| 584 | |
| 585 | if (data == NULL || size == 0) |
| 586 | return; |
| 587 | |
| 588 | for (no = 0; no < ACPI_OVERRIDE_TABLES; no++) { |
| 589 | file = find_cpio_data(cpio_path, data, size, &offset); |
| 590 | if (!file.data) |
| 591 | break; |
| 592 | |
| 593 | data += offset; |
| 594 | size -= offset; |
| 595 | |
| 596 | if (file.size < sizeof(struct acpi_table_header)) { |
| 597 | pr_err("ACPI OVERRIDE: Table smaller than ACPI header [%s%s]\n", |
| 598 | cpio_path, file.name); |
| 599 | continue; |
| 600 | } |
| 601 | |
| 602 | table = file.data; |
| 603 | |
| 604 | for (sig = 0; table_sigs[sig]; sig++) |
| 605 | if (!memcmp(table->signature, table_sigs[sig], 4)) |
| 606 | break; |
| 607 | |
| 608 | if (!table_sigs[sig]) { |
| 609 | pr_err("ACPI OVERRIDE: Unknown signature [%s%s]\n", |
| 610 | cpio_path, file.name); |
| 611 | continue; |
| 612 | } |
| 613 | if (file.size != table->length) { |
| 614 | pr_err("ACPI OVERRIDE: File length does not match table length [%s%s]\n", |
| 615 | cpio_path, file.name); |
| 616 | continue; |
| 617 | } |
| 618 | if (acpi_table_checksum(file.data, table->length)) { |
| 619 | pr_err("ACPI OVERRIDE: Bad table checksum [%s%s]\n", |
| 620 | cpio_path, file.name); |
| 621 | continue; |
| 622 | } |
| 623 | |
| 624 | pr_info("%4.4s ACPI table found in initrd [%s%s][0x%x]\n", |
| 625 | table->signature, cpio_path, file.name, table->length); |
| 626 | |
| 627 | all_tables_size += table->length; |
| 628 | early_initrd_files[table_nr].data = file.data; |
| 629 | early_initrd_files[table_nr].size = file.size; |
| 630 | table_nr++; |
| 631 | } |
| 632 | if (table_nr == 0) |
| 633 | return; |
| 634 | |
| 635 | acpi_tables_addr = |
| 636 | memblock_find_in_range(0, max_low_pfn_mapped << PAGE_SHIFT, |
| 637 | all_tables_size, PAGE_SIZE); |
| 638 | if (!acpi_tables_addr) { |
| 639 | WARN_ON(1); |
| 640 | return; |
| 641 | } |
| 642 | /* |
| 643 | * Only calling e820_add_reserve does not work and the |
| 644 | * tables are invalid (memory got used) later. |
| 645 | * memblock_reserve works as expected and the tables won't get modified. |
| 646 | * But it's not enough on X86 because ioremap will |
| 647 | * complain later (used by acpi_os_map_memory) that the pages |
| 648 | * that should get mapped are not marked "reserved". |
| 649 | * Both memblock_reserve and e820_add_region (via arch_reserve_mem_area) |
| 650 | * works fine. |
| 651 | */ |
| 652 | memblock_reserve(acpi_tables_addr, all_tables_size); |
| 653 | arch_reserve_mem_area(acpi_tables_addr, all_tables_size); |
| 654 | |
| 655 | p = early_ioremap(acpi_tables_addr, all_tables_size); |
| 656 | |
| 657 | for (no = 0; no < table_nr; no++) { |
| 658 | memcpy(p + total_offset, early_initrd_files[no].data, |
| 659 | early_initrd_files[no].size); |
| 660 | total_offset += early_initrd_files[no].size; |
| 661 | } |
| 662 | early_iounmap(p, all_tables_size); |
| 663 | } |
| 664 | #endif /* CONFIG_ACPI_INITRD_TABLE_OVERRIDE */ |
| 665 | |
| 666 | static void acpi_table_taint(struct acpi_table_header *table) |
| 667 | { |
| 668 | pr_warn(PREFIX |
| 669 | "Override [%4.4s-%8.8s], this is unsafe: tainting kernel\n", |
| 670 | table->signature, table->oem_table_id); |
| 671 | add_taint(TAINT_OVERRIDDEN_ACPI_TABLE, LOCKDEP_NOW_UNRELIABLE); |
| 672 | } |
| 673 | |
| 674 | |
| 675 | acpi_status |
| 676 | acpi_os_table_override(struct acpi_table_header * existing_table, |
| 677 | struct acpi_table_header ** new_table) |
| 678 | { |
| 679 | if (!existing_table || !new_table) |
| 680 | return AE_BAD_PARAMETER; |
| 681 | |
| 682 | *new_table = NULL; |
| 683 | |
| 684 | #ifdef CONFIG_ACPI_CUSTOM_DSDT |
| 685 | if (strncmp(existing_table->signature, "DSDT", 4) == 0) |
| 686 | *new_table = (struct acpi_table_header *)AmlCode; |
| 687 | #endif |
| 688 | if (*new_table != NULL) |
| 689 | acpi_table_taint(existing_table); |
| 690 | return AE_OK; |
| 691 | } |
| 692 | |
| 693 | acpi_status |
| 694 | acpi_os_physical_table_override(struct acpi_table_header *existing_table, |
| 695 | acpi_physical_address *address, |
| 696 | u32 *table_length) |
| 697 | { |
| 698 | #ifndef CONFIG_ACPI_INITRD_TABLE_OVERRIDE |
| 699 | *table_length = 0; |
| 700 | *address = 0; |
| 701 | return AE_OK; |
| 702 | #else |
| 703 | int table_offset = 0; |
| 704 | struct acpi_table_header *table; |
| 705 | |
| 706 | *table_length = 0; |
| 707 | *address = 0; |
| 708 | |
| 709 | if (!acpi_tables_addr) |
| 710 | return AE_OK; |
| 711 | |
| 712 | do { |
| 713 | if (table_offset + ACPI_HEADER_SIZE > all_tables_size) { |
| 714 | WARN_ON(1); |
| 715 | return AE_OK; |
| 716 | } |
| 717 | |
| 718 | table = acpi_os_map_memory(acpi_tables_addr + table_offset, |
| 719 | ACPI_HEADER_SIZE); |
| 720 | |
| 721 | if (table_offset + table->length > all_tables_size) { |
| 722 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); |
| 723 | WARN_ON(1); |
| 724 | return AE_OK; |
| 725 | } |
| 726 | |
| 727 | table_offset += table->length; |
| 728 | |
| 729 | if (memcmp(existing_table->signature, table->signature, 4)) { |
| 730 | acpi_os_unmap_memory(table, |
| 731 | ACPI_HEADER_SIZE); |
| 732 | continue; |
| 733 | } |
| 734 | |
| 735 | /* Only override tables with matching oem id */ |
| 736 | if (memcmp(table->oem_table_id, existing_table->oem_table_id, |
| 737 | ACPI_OEM_TABLE_ID_SIZE)) { |
| 738 | acpi_os_unmap_memory(table, |
| 739 | ACPI_HEADER_SIZE); |
| 740 | continue; |
| 741 | } |
| 742 | |
| 743 | table_offset -= table->length; |
| 744 | *table_length = table->length; |
| 745 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); |
| 746 | *address = acpi_tables_addr + table_offset; |
| 747 | break; |
| 748 | } while (table_offset + ACPI_HEADER_SIZE < all_tables_size); |
| 749 | |
| 750 | if (*address != 0) |
| 751 | acpi_table_taint(existing_table); |
| 752 | return AE_OK; |
| 753 | #endif |
| 754 | } |
| 755 | |
| 756 | static irqreturn_t acpi_irq(int irq, void *dev_id) |
| 757 | { |
| 758 | u32 handled; |
| 759 | |
| 760 | handled = (*acpi_irq_handler) (acpi_irq_context); |
| 761 | |
| 762 | if (handled) { |
| 763 | acpi_irq_handled++; |
| 764 | return IRQ_HANDLED; |
| 765 | } else { |
| 766 | acpi_irq_not_handled++; |
| 767 | return IRQ_NONE; |
| 768 | } |
| 769 | } |
| 770 | |
| 771 | acpi_status |
| 772 | acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler, |
| 773 | void *context) |
| 774 | { |
| 775 | unsigned int irq; |
| 776 | |
| 777 | acpi_irq_stats_init(); |
| 778 | |
| 779 | /* |
| 780 | * ACPI interrupts different from the SCI in our copy of the FADT are |
| 781 | * not supported. |
| 782 | */ |
| 783 | if (gsi != acpi_gbl_FADT.sci_interrupt) |
| 784 | return AE_BAD_PARAMETER; |
| 785 | |
| 786 | if (acpi_irq_handler) |
| 787 | return AE_ALREADY_ACQUIRED; |
| 788 | |
| 789 | if (acpi_gsi_to_irq(gsi, &irq) < 0) { |
| 790 | printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n", |
| 791 | gsi); |
| 792 | return AE_OK; |
| 793 | } |
| 794 | |
| 795 | acpi_irq_handler = handler; |
| 796 | acpi_irq_context = context; |
| 797 | if (request_irq(irq, acpi_irq, IRQF_SHARED | IRQF_NO_SUSPEND, "acpi", acpi_irq)) { |
| 798 | printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq); |
| 799 | acpi_irq_handler = NULL; |
| 800 | return AE_NOT_ACQUIRED; |
| 801 | } |
| 802 | |
| 803 | return AE_OK; |
| 804 | } |
| 805 | |
| 806 | acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler) |
| 807 | { |
| 808 | if (irq != acpi_gbl_FADT.sci_interrupt) |
| 809 | return AE_BAD_PARAMETER; |
| 810 | |
| 811 | free_irq(irq, acpi_irq); |
| 812 | acpi_irq_handler = NULL; |
| 813 | |
| 814 | return AE_OK; |
| 815 | } |
| 816 | |
| 817 | /* |
| 818 | * Running in interpreter thread context, safe to sleep |
| 819 | */ |
| 820 | |
| 821 | void acpi_os_sleep(u64 ms) |
| 822 | { |
| 823 | schedule_timeout_interruptible(msecs_to_jiffies(ms)); |
| 824 | } |
| 825 | |
| 826 | void acpi_os_stall(u32 us) |
| 827 | { |
| 828 | while (us) { |
| 829 | u32 delay = 1000; |
| 830 | |
| 831 | if (delay > us) |
| 832 | delay = us; |
| 833 | udelay(delay); |
| 834 | touch_nmi_watchdog(); |
| 835 | us -= delay; |
| 836 | } |
| 837 | } |
| 838 | |
| 839 | /* |
| 840 | * Support ACPI 3.0 AML Timer operand |
| 841 | * Returns 64-bit free-running, monotonically increasing timer |
| 842 | * with 100ns granularity |
| 843 | */ |
| 844 | u64 acpi_os_get_timer(void) |
| 845 | { |
| 846 | u64 time_ns = ktime_to_ns(ktime_get()); |
| 847 | do_div(time_ns, 100); |
| 848 | return time_ns; |
| 849 | } |
| 850 | |
| 851 | acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width) |
| 852 | { |
| 853 | u32 dummy; |
| 854 | |
| 855 | if (!value) |
| 856 | value = &dummy; |
| 857 | |
| 858 | *value = 0; |
| 859 | if (width <= 8) { |
| 860 | *(u8 *) value = inb(port); |
| 861 | } else if (width <= 16) { |
| 862 | *(u16 *) value = inw(port); |
| 863 | } else if (width <= 32) { |
| 864 | *(u32 *) value = inl(port); |
| 865 | } else { |
| 866 | BUG(); |
| 867 | } |
| 868 | |
| 869 | return AE_OK; |
| 870 | } |
| 871 | |
| 872 | EXPORT_SYMBOL(acpi_os_read_port); |
| 873 | |
| 874 | acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width) |
| 875 | { |
| 876 | if (width <= 8) { |
| 877 | outb(value, port); |
| 878 | } else if (width <= 16) { |
| 879 | outw(value, port); |
| 880 | } else if (width <= 32) { |
| 881 | outl(value, port); |
| 882 | } else { |
| 883 | BUG(); |
| 884 | } |
| 885 | |
| 886 | return AE_OK; |
| 887 | } |
| 888 | |
| 889 | EXPORT_SYMBOL(acpi_os_write_port); |
| 890 | |
| 891 | #ifdef readq |
| 892 | static inline u64 read64(const volatile void __iomem *addr) |
| 893 | { |
| 894 | return readq(addr); |
| 895 | } |
| 896 | #else |
| 897 | static inline u64 read64(const volatile void __iomem *addr) |
| 898 | { |
| 899 | u64 l, h; |
| 900 | l = readl(addr); |
| 901 | h = readl(addr+4); |
| 902 | return l | (h << 32); |
| 903 | } |
| 904 | #endif |
| 905 | |
| 906 | acpi_status |
| 907 | acpi_os_read_memory(acpi_physical_address phys_addr, u64 *value, u32 width) |
| 908 | { |
| 909 | void __iomem *virt_addr; |
| 910 | unsigned int size = width / 8; |
| 911 | bool unmap = false; |
| 912 | u64 dummy; |
| 913 | |
| 914 | rcu_read_lock(); |
| 915 | virt_addr = acpi_map_vaddr_lookup(phys_addr, size); |
| 916 | if (!virt_addr) { |
| 917 | rcu_read_unlock(); |
| 918 | virt_addr = acpi_os_ioremap(phys_addr, size); |
| 919 | if (!virt_addr) |
| 920 | return AE_BAD_ADDRESS; |
| 921 | unmap = true; |
| 922 | } |
| 923 | |
| 924 | if (!value) |
| 925 | value = &dummy; |
| 926 | |
| 927 | switch (width) { |
| 928 | case 8: |
| 929 | *(u8 *) value = readb(virt_addr); |
| 930 | break; |
| 931 | case 16: |
| 932 | *(u16 *) value = readw(virt_addr); |
| 933 | break; |
| 934 | case 32: |
| 935 | *(u32 *) value = readl(virt_addr); |
| 936 | break; |
| 937 | case 64: |
| 938 | *(u64 *) value = read64(virt_addr); |
| 939 | break; |
| 940 | default: |
| 941 | BUG(); |
| 942 | } |
| 943 | |
| 944 | if (unmap) |
| 945 | iounmap(virt_addr); |
| 946 | else |
| 947 | rcu_read_unlock(); |
| 948 | |
| 949 | return AE_OK; |
| 950 | } |
| 951 | |
| 952 | #ifdef writeq |
| 953 | static inline void write64(u64 val, volatile void __iomem *addr) |
| 954 | { |
| 955 | writeq(val, addr); |
| 956 | } |
| 957 | #else |
| 958 | static inline void write64(u64 val, volatile void __iomem *addr) |
| 959 | { |
| 960 | writel(val, addr); |
| 961 | writel(val>>32, addr+4); |
| 962 | } |
| 963 | #endif |
| 964 | |
| 965 | acpi_status |
| 966 | acpi_os_write_memory(acpi_physical_address phys_addr, u64 value, u32 width) |
| 967 | { |
| 968 | void __iomem *virt_addr; |
| 969 | unsigned int size = width / 8; |
| 970 | bool unmap = false; |
| 971 | |
| 972 | rcu_read_lock(); |
| 973 | virt_addr = acpi_map_vaddr_lookup(phys_addr, size); |
| 974 | if (!virt_addr) { |
| 975 | rcu_read_unlock(); |
| 976 | virt_addr = acpi_os_ioremap(phys_addr, size); |
| 977 | if (!virt_addr) |
| 978 | return AE_BAD_ADDRESS; |
| 979 | unmap = true; |
| 980 | } |
| 981 | |
| 982 | switch (width) { |
| 983 | case 8: |
| 984 | writeb(value, virt_addr); |
| 985 | break; |
| 986 | case 16: |
| 987 | writew(value, virt_addr); |
| 988 | break; |
| 989 | case 32: |
| 990 | writel(value, virt_addr); |
| 991 | break; |
| 992 | case 64: |
| 993 | write64(value, virt_addr); |
| 994 | break; |
| 995 | default: |
| 996 | BUG(); |
| 997 | } |
| 998 | |
| 999 | if (unmap) |
| 1000 | iounmap(virt_addr); |
| 1001 | else |
| 1002 | rcu_read_unlock(); |
| 1003 | |
| 1004 | return AE_OK; |
| 1005 | } |
| 1006 | |
| 1007 | acpi_status |
| 1008 | acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
| 1009 | u64 *value, u32 width) |
| 1010 | { |
| 1011 | int result, size; |
| 1012 | u32 value32; |
| 1013 | |
| 1014 | if (!value) |
| 1015 | return AE_BAD_PARAMETER; |
| 1016 | |
| 1017 | switch (width) { |
| 1018 | case 8: |
| 1019 | size = 1; |
| 1020 | break; |
| 1021 | case 16: |
| 1022 | size = 2; |
| 1023 | break; |
| 1024 | case 32: |
| 1025 | size = 4; |
| 1026 | break; |
| 1027 | default: |
| 1028 | return AE_ERROR; |
| 1029 | } |
| 1030 | |
| 1031 | result = raw_pci_read(pci_id->segment, pci_id->bus, |
| 1032 | PCI_DEVFN(pci_id->device, pci_id->function), |
| 1033 | reg, size, &value32); |
| 1034 | *value = value32; |
| 1035 | |
| 1036 | return (result ? AE_ERROR : AE_OK); |
| 1037 | } |
| 1038 | |
| 1039 | acpi_status |
| 1040 | acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
| 1041 | u64 value, u32 width) |
| 1042 | { |
| 1043 | int result, size; |
| 1044 | |
| 1045 | switch (width) { |
| 1046 | case 8: |
| 1047 | size = 1; |
| 1048 | break; |
| 1049 | case 16: |
| 1050 | size = 2; |
| 1051 | break; |
| 1052 | case 32: |
| 1053 | size = 4; |
| 1054 | break; |
| 1055 | default: |
| 1056 | return AE_ERROR; |
| 1057 | } |
| 1058 | |
| 1059 | result = raw_pci_write(pci_id->segment, pci_id->bus, |
| 1060 | PCI_DEVFN(pci_id->device, pci_id->function), |
| 1061 | reg, size, value); |
| 1062 | |
| 1063 | return (result ? AE_ERROR : AE_OK); |
| 1064 | } |
| 1065 | |
| 1066 | static void acpi_os_execute_deferred(struct work_struct *work) |
| 1067 | { |
| 1068 | struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work); |
| 1069 | |
| 1070 | if (dpc->wait) |
| 1071 | acpi_os_wait_events_complete(); |
| 1072 | |
| 1073 | dpc->function(dpc->context); |
| 1074 | kfree(dpc); |
| 1075 | } |
| 1076 | |
| 1077 | /******************************************************************************* |
| 1078 | * |
| 1079 | * FUNCTION: acpi_os_execute |
| 1080 | * |
| 1081 | * PARAMETERS: Type - Type of the callback |
| 1082 | * Function - Function to be executed |
| 1083 | * Context - Function parameters |
| 1084 | * |
| 1085 | * RETURN: Status |
| 1086 | * |
| 1087 | * DESCRIPTION: Depending on type, either queues function for deferred execution or |
| 1088 | * immediately executes function on a separate thread. |
| 1089 | * |
| 1090 | ******************************************************************************/ |
| 1091 | |
| 1092 | static acpi_status __acpi_os_execute(acpi_execute_type type, |
| 1093 | acpi_osd_exec_callback function, void *context, int hp) |
| 1094 | { |
| 1095 | acpi_status status = AE_OK; |
| 1096 | struct acpi_os_dpc *dpc; |
| 1097 | struct workqueue_struct *queue; |
| 1098 | int ret; |
| 1099 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
| 1100 | "Scheduling function [%p(%p)] for deferred execution.\n", |
| 1101 | function, context)); |
| 1102 | |
| 1103 | /* |
| 1104 | * Allocate/initialize DPC structure. Note that this memory will be |
| 1105 | * freed by the callee. The kernel handles the work_struct list in a |
| 1106 | * way that allows us to also free its memory inside the callee. |
| 1107 | * Because we may want to schedule several tasks with different |
| 1108 | * parameters we can't use the approach some kernel code uses of |
| 1109 | * having a static work_struct. |
| 1110 | */ |
| 1111 | |
| 1112 | dpc = kzalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC); |
| 1113 | if (!dpc) |
| 1114 | return AE_NO_MEMORY; |
| 1115 | |
| 1116 | dpc->function = function; |
| 1117 | dpc->context = context; |
| 1118 | |
| 1119 | /* |
| 1120 | * We can't run hotplug code in keventd_wq/kacpid_wq/kacpid_notify_wq |
| 1121 | * because the hotplug code may call driver .remove() functions, |
| 1122 | * which invoke flush_scheduled_work/acpi_os_wait_events_complete |
| 1123 | * to flush these workqueues. |
| 1124 | * |
| 1125 | * To prevent lockdep from complaining unnecessarily, make sure that |
| 1126 | * there is a different static lockdep key for each workqueue by using |
| 1127 | * INIT_WORK() for each of them separately. |
| 1128 | */ |
| 1129 | if (hp) { |
| 1130 | queue = kacpi_hotplug_wq; |
| 1131 | dpc->wait = 1; |
| 1132 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); |
| 1133 | } else if (type == OSL_NOTIFY_HANDLER) { |
| 1134 | queue = kacpi_notify_wq; |
| 1135 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); |
| 1136 | } else { |
| 1137 | queue = kacpid_wq; |
| 1138 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); |
| 1139 | } |
| 1140 | |
| 1141 | /* |
| 1142 | * On some machines, a software-initiated SMI causes corruption unless |
| 1143 | * the SMI runs on CPU 0. An SMI can be initiated by any AML, but |
| 1144 | * typically it's done in GPE-related methods that are run via |
| 1145 | * workqueues, so we can avoid the known corruption cases by always |
| 1146 | * queueing on CPU 0. |
| 1147 | */ |
| 1148 | ret = queue_work_on(0, queue, &dpc->work); |
| 1149 | |
| 1150 | if (!ret) { |
| 1151 | printk(KERN_ERR PREFIX |
| 1152 | "Call to queue_work() failed.\n"); |
| 1153 | status = AE_ERROR; |
| 1154 | kfree(dpc); |
| 1155 | } |
| 1156 | return status; |
| 1157 | } |
| 1158 | |
| 1159 | acpi_status acpi_os_execute(acpi_execute_type type, |
| 1160 | acpi_osd_exec_callback function, void *context) |
| 1161 | { |
| 1162 | return __acpi_os_execute(type, function, context, 0); |
| 1163 | } |
| 1164 | EXPORT_SYMBOL(acpi_os_execute); |
| 1165 | |
| 1166 | acpi_status acpi_os_hotplug_execute(acpi_osd_exec_callback function, |
| 1167 | void *context) |
| 1168 | { |
| 1169 | return __acpi_os_execute(0, function, context, 1); |
| 1170 | } |
| 1171 | EXPORT_SYMBOL(acpi_os_hotplug_execute); |
| 1172 | |
| 1173 | void acpi_os_wait_events_complete(void) |
| 1174 | { |
| 1175 | flush_workqueue(kacpid_wq); |
| 1176 | flush_workqueue(kacpi_notify_wq); |
| 1177 | } |
| 1178 | |
| 1179 | EXPORT_SYMBOL(acpi_os_wait_events_complete); |
| 1180 | |
| 1181 | acpi_status |
| 1182 | acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle) |
| 1183 | { |
| 1184 | struct semaphore *sem = NULL; |
| 1185 | |
| 1186 | sem = acpi_os_allocate(sizeof(struct semaphore)); |
| 1187 | if (!sem) |
| 1188 | return AE_NO_MEMORY; |
| 1189 | memset(sem, 0, sizeof(struct semaphore)); |
| 1190 | |
| 1191 | sema_init(sem, initial_units); |
| 1192 | |
| 1193 | *handle = (acpi_handle *) sem; |
| 1194 | |
| 1195 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n", |
| 1196 | *handle, initial_units)); |
| 1197 | |
| 1198 | return AE_OK; |
| 1199 | } |
| 1200 | |
| 1201 | /* |
| 1202 | * TODO: A better way to delete semaphores? Linux doesn't have a |
| 1203 | * 'delete_semaphore()' function -- may result in an invalid |
| 1204 | * pointer dereference for non-synchronized consumers. Should |
| 1205 | * we at least check for blocked threads and signal/cancel them? |
| 1206 | */ |
| 1207 | |
| 1208 | acpi_status acpi_os_delete_semaphore(acpi_handle handle) |
| 1209 | { |
| 1210 | struct semaphore *sem = (struct semaphore *)handle; |
| 1211 | |
| 1212 | if (!sem) |
| 1213 | return AE_BAD_PARAMETER; |
| 1214 | |
| 1215 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle)); |
| 1216 | |
| 1217 | BUG_ON(!list_empty(&sem->wait_list)); |
| 1218 | kfree(sem); |
| 1219 | sem = NULL; |
| 1220 | |
| 1221 | return AE_OK; |
| 1222 | } |
| 1223 | |
| 1224 | /* |
| 1225 | * TODO: Support for units > 1? |
| 1226 | */ |
| 1227 | acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout) |
| 1228 | { |
| 1229 | acpi_status status = AE_OK; |
| 1230 | struct semaphore *sem = (struct semaphore *)handle; |
| 1231 | long jiffies; |
| 1232 | int ret = 0; |
| 1233 | |
| 1234 | if (!sem || (units < 1)) |
| 1235 | return AE_BAD_PARAMETER; |
| 1236 | |
| 1237 | if (units > 1) |
| 1238 | return AE_SUPPORT; |
| 1239 | |
| 1240 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n", |
| 1241 | handle, units, timeout)); |
| 1242 | |
| 1243 | if (timeout == ACPI_WAIT_FOREVER) |
| 1244 | jiffies = MAX_SCHEDULE_TIMEOUT; |
| 1245 | else |
| 1246 | jiffies = msecs_to_jiffies(timeout); |
| 1247 | |
| 1248 | ret = down_timeout(sem, jiffies); |
| 1249 | if (ret) |
| 1250 | status = AE_TIME; |
| 1251 | |
| 1252 | if (ACPI_FAILURE(status)) { |
| 1253 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, |
| 1254 | "Failed to acquire semaphore[%p|%d|%d], %s", |
| 1255 | handle, units, timeout, |
| 1256 | acpi_format_exception(status))); |
| 1257 | } else { |
| 1258 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, |
| 1259 | "Acquired semaphore[%p|%d|%d]", handle, |
| 1260 | units, timeout)); |
| 1261 | } |
| 1262 | |
| 1263 | return status; |
| 1264 | } |
| 1265 | |
| 1266 | /* |
| 1267 | * TODO: Support for units > 1? |
| 1268 | */ |
| 1269 | acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units) |
| 1270 | { |
| 1271 | struct semaphore *sem = (struct semaphore *)handle; |
| 1272 | |
| 1273 | if (!sem || (units < 1)) |
| 1274 | return AE_BAD_PARAMETER; |
| 1275 | |
| 1276 | if (units > 1) |
| 1277 | return AE_SUPPORT; |
| 1278 | |
| 1279 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle, |
| 1280 | units)); |
| 1281 | |
| 1282 | up(sem); |
| 1283 | |
| 1284 | return AE_OK; |
| 1285 | } |
| 1286 | |
| 1287 | #ifdef ACPI_FUTURE_USAGE |
| 1288 | u32 acpi_os_get_line(char *buffer) |
| 1289 | { |
| 1290 | |
| 1291 | #ifdef ENABLE_DEBUGGER |
| 1292 | if (acpi_in_debugger) { |
| 1293 | u32 chars; |
| 1294 | |
| 1295 | kdb_read(buffer, sizeof(line_buf)); |
| 1296 | |
| 1297 | /* remove the CR kdb includes */ |
| 1298 | chars = strlen(buffer) - 1; |
| 1299 | buffer[chars] = '\0'; |
| 1300 | } |
| 1301 | #endif |
| 1302 | |
| 1303 | return 0; |
| 1304 | } |
| 1305 | #endif /* ACPI_FUTURE_USAGE */ |
| 1306 | |
| 1307 | acpi_status acpi_os_signal(u32 function, void *info) |
| 1308 | { |
| 1309 | switch (function) { |
| 1310 | case ACPI_SIGNAL_FATAL: |
| 1311 | printk(KERN_ERR PREFIX "Fatal opcode executed\n"); |
| 1312 | break; |
| 1313 | case ACPI_SIGNAL_BREAKPOINT: |
| 1314 | /* |
| 1315 | * AML Breakpoint |
| 1316 | * ACPI spec. says to treat it as a NOP unless |
| 1317 | * you are debugging. So if/when we integrate |
| 1318 | * AML debugger into the kernel debugger its |
| 1319 | * hook will go here. But until then it is |
| 1320 | * not useful to print anything on breakpoints. |
| 1321 | */ |
| 1322 | break; |
| 1323 | default: |
| 1324 | break; |
| 1325 | } |
| 1326 | |
| 1327 | return AE_OK; |
| 1328 | } |
| 1329 | |
| 1330 | static int __init acpi_os_name_setup(char *str) |
| 1331 | { |
| 1332 | char *p = acpi_os_name; |
| 1333 | int count = ACPI_MAX_OVERRIDE_LEN - 1; |
| 1334 | |
| 1335 | if (!str || !*str) |
| 1336 | return 0; |
| 1337 | |
| 1338 | for (; count-- && str && *str; str++) { |
| 1339 | if (isalnum(*str) || *str == ' ' || *str == ':') |
| 1340 | *p++ = *str; |
| 1341 | else if (*str == '\'' || *str == '"') |
| 1342 | continue; |
| 1343 | else |
| 1344 | break; |
| 1345 | } |
| 1346 | *p = 0; |
| 1347 | |
| 1348 | return 1; |
| 1349 | |
| 1350 | } |
| 1351 | |
| 1352 | __setup("acpi_os_name=", acpi_os_name_setup); |
| 1353 | |
| 1354 | #define OSI_STRING_LENGTH_MAX 64 /* arbitrary */ |
| 1355 | #define OSI_STRING_ENTRIES_MAX 16 /* arbitrary */ |
| 1356 | |
| 1357 | struct osi_setup_entry { |
| 1358 | char string[OSI_STRING_LENGTH_MAX]; |
| 1359 | bool enable; |
| 1360 | }; |
| 1361 | |
| 1362 | static struct osi_setup_entry |
| 1363 | osi_setup_entries[OSI_STRING_ENTRIES_MAX] __initdata = { |
| 1364 | {"Module Device", true}, |
| 1365 | {"Processor Device", true}, |
| 1366 | {"3.0 _SCP Extensions", true}, |
| 1367 | {"Processor Aggregator Device", true}, |
| 1368 | }; |
| 1369 | |
| 1370 | void __init acpi_osi_setup(char *str) |
| 1371 | { |
| 1372 | struct osi_setup_entry *osi; |
| 1373 | bool enable = true; |
| 1374 | int i; |
| 1375 | |
| 1376 | if (!acpi_gbl_create_osi_method) |
| 1377 | return; |
| 1378 | |
| 1379 | if (str == NULL || *str == '\0') { |
| 1380 | printk(KERN_INFO PREFIX "_OSI method disabled\n"); |
| 1381 | acpi_gbl_create_osi_method = FALSE; |
| 1382 | return; |
| 1383 | } |
| 1384 | |
| 1385 | if (*str == '!') { |
| 1386 | str++; |
| 1387 | if (*str == '\0') { |
| 1388 | osi_linux.default_disabling = 1; |
| 1389 | return; |
| 1390 | } else if (*str == '*') { |
| 1391 | acpi_update_interfaces(ACPI_DISABLE_ALL_STRINGS); |
| 1392 | for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { |
| 1393 | osi = &osi_setup_entries[i]; |
| 1394 | osi->enable = false; |
| 1395 | } |
| 1396 | return; |
| 1397 | } |
| 1398 | enable = false; |
| 1399 | } |
| 1400 | |
| 1401 | for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { |
| 1402 | osi = &osi_setup_entries[i]; |
| 1403 | if (!strcmp(osi->string, str)) { |
| 1404 | osi->enable = enable; |
| 1405 | break; |
| 1406 | } else if (osi->string[0] == '\0') { |
| 1407 | osi->enable = enable; |
| 1408 | strncpy(osi->string, str, OSI_STRING_LENGTH_MAX); |
| 1409 | break; |
| 1410 | } |
| 1411 | } |
| 1412 | } |
| 1413 | |
| 1414 | static void __init set_osi_linux(unsigned int enable) |
| 1415 | { |
| 1416 | if (osi_linux.enable != enable) |
| 1417 | osi_linux.enable = enable; |
| 1418 | |
| 1419 | if (osi_linux.enable) |
| 1420 | acpi_osi_setup("Linux"); |
| 1421 | else |
| 1422 | acpi_osi_setup("!Linux"); |
| 1423 | |
| 1424 | return; |
| 1425 | } |
| 1426 | |
| 1427 | static void __init acpi_cmdline_osi_linux(unsigned int enable) |
| 1428 | { |
| 1429 | osi_linux.cmdline = 1; /* cmdline set the default and override DMI */ |
| 1430 | osi_linux.dmi = 0; |
| 1431 | set_osi_linux(enable); |
| 1432 | |
| 1433 | return; |
| 1434 | } |
| 1435 | |
| 1436 | void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d) |
| 1437 | { |
| 1438 | printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident); |
| 1439 | |
| 1440 | if (enable == -1) |
| 1441 | return; |
| 1442 | |
| 1443 | osi_linux.dmi = 1; /* DMI knows that this box asks OSI(Linux) */ |
| 1444 | set_osi_linux(enable); |
| 1445 | |
| 1446 | return; |
| 1447 | } |
| 1448 | |
| 1449 | /* |
| 1450 | * Modify the list of "OS Interfaces" reported to BIOS via _OSI |
| 1451 | * |
| 1452 | * empty string disables _OSI |
| 1453 | * string starting with '!' disables that string |
| 1454 | * otherwise string is added to list, augmenting built-in strings |
| 1455 | */ |
| 1456 | static void __init acpi_osi_setup_late(void) |
| 1457 | { |
| 1458 | struct osi_setup_entry *osi; |
| 1459 | char *str; |
| 1460 | int i; |
| 1461 | acpi_status status; |
| 1462 | |
| 1463 | if (osi_linux.default_disabling) { |
| 1464 | status = acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS); |
| 1465 | |
| 1466 | if (ACPI_SUCCESS(status)) |
| 1467 | printk(KERN_INFO PREFIX "Disabled all _OSI OS vendors\n"); |
| 1468 | } |
| 1469 | |
| 1470 | for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { |
| 1471 | osi = &osi_setup_entries[i]; |
| 1472 | str = osi->string; |
| 1473 | |
| 1474 | if (*str == '\0') |
| 1475 | break; |
| 1476 | if (osi->enable) { |
| 1477 | status = acpi_install_interface(str); |
| 1478 | |
| 1479 | if (ACPI_SUCCESS(status)) |
| 1480 | printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str); |
| 1481 | } else { |
| 1482 | status = acpi_remove_interface(str); |
| 1483 | |
| 1484 | if (ACPI_SUCCESS(status)) |
| 1485 | printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str); |
| 1486 | } |
| 1487 | } |
| 1488 | } |
| 1489 | |
| 1490 | static int __init osi_setup(char *str) |
| 1491 | { |
| 1492 | if (str && !strcmp("Linux", str)) |
| 1493 | acpi_cmdline_osi_linux(1); |
| 1494 | else if (str && !strcmp("!Linux", str)) |
| 1495 | acpi_cmdline_osi_linux(0); |
| 1496 | else |
| 1497 | acpi_osi_setup(str); |
| 1498 | |
| 1499 | return 1; |
| 1500 | } |
| 1501 | |
| 1502 | __setup("acpi_osi=", osi_setup); |
| 1503 | |
| 1504 | /* enable serialization to combat AE_ALREADY_EXISTS errors */ |
| 1505 | static int __init acpi_serialize_setup(char *str) |
| 1506 | { |
| 1507 | printk(KERN_INFO PREFIX "serialize enabled\n"); |
| 1508 | |
| 1509 | acpi_gbl_all_methods_serialized = TRUE; |
| 1510 | |
| 1511 | return 1; |
| 1512 | } |
| 1513 | |
| 1514 | __setup("acpi_serialize", acpi_serialize_setup); |
| 1515 | |
| 1516 | /* Check of resource interference between native drivers and ACPI |
| 1517 | * OperationRegions (SystemIO and System Memory only). |
| 1518 | * IO ports and memory declared in ACPI might be used by the ACPI subsystem |
| 1519 | * in arbitrary AML code and can interfere with legacy drivers. |
| 1520 | * acpi_enforce_resources= can be set to: |
| 1521 | * |
| 1522 | * - strict (default) (2) |
| 1523 | * -> further driver trying to access the resources will not load |
| 1524 | * - lax (1) |
| 1525 | * -> further driver trying to access the resources will load, but you |
| 1526 | * get a system message that something might go wrong... |
| 1527 | * |
| 1528 | * - no (0) |
| 1529 | * -> ACPI Operation Region resources will not be registered |
| 1530 | * |
| 1531 | */ |
| 1532 | #define ENFORCE_RESOURCES_STRICT 2 |
| 1533 | #define ENFORCE_RESOURCES_LAX 1 |
| 1534 | #define ENFORCE_RESOURCES_NO 0 |
| 1535 | |
| 1536 | static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; |
| 1537 | |
| 1538 | static int __init acpi_enforce_resources_setup(char *str) |
| 1539 | { |
| 1540 | if (str == NULL || *str == '\0') |
| 1541 | return 0; |
| 1542 | |
| 1543 | if (!strcmp("strict", str)) |
| 1544 | acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; |
| 1545 | else if (!strcmp("lax", str)) |
| 1546 | acpi_enforce_resources = ENFORCE_RESOURCES_LAX; |
| 1547 | else if (!strcmp("no", str)) |
| 1548 | acpi_enforce_resources = ENFORCE_RESOURCES_NO; |
| 1549 | |
| 1550 | return 1; |
| 1551 | } |
| 1552 | |
| 1553 | __setup("acpi_enforce_resources=", acpi_enforce_resources_setup); |
| 1554 | |
| 1555 | /* Check for resource conflicts between ACPI OperationRegions and native |
| 1556 | * drivers */ |
| 1557 | int acpi_check_resource_conflict(const struct resource *res) |
| 1558 | { |
| 1559 | acpi_adr_space_type space_id; |
| 1560 | acpi_size length; |
| 1561 | u8 warn = 0; |
| 1562 | int clash = 0; |
| 1563 | |
| 1564 | if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) |
| 1565 | return 0; |
| 1566 | if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM)) |
| 1567 | return 0; |
| 1568 | |
| 1569 | if (res->flags & IORESOURCE_IO) |
| 1570 | space_id = ACPI_ADR_SPACE_SYSTEM_IO; |
| 1571 | else |
| 1572 | space_id = ACPI_ADR_SPACE_SYSTEM_MEMORY; |
| 1573 | |
| 1574 | length = resource_size(res); |
| 1575 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) |
| 1576 | warn = 1; |
| 1577 | clash = acpi_check_address_range(space_id, res->start, length, warn); |
| 1578 | |
| 1579 | if (clash) { |
| 1580 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) { |
| 1581 | if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX) |
| 1582 | printk(KERN_NOTICE "ACPI: This conflict may" |
| 1583 | " cause random problems and system" |
| 1584 | " instability\n"); |
| 1585 | printk(KERN_INFO "ACPI: If an ACPI driver is available" |
| 1586 | " for this device, you should use it instead of" |
| 1587 | " the native driver\n"); |
| 1588 | } |
| 1589 | if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT) |
| 1590 | return -EBUSY; |
| 1591 | } |
| 1592 | return 0; |
| 1593 | } |
| 1594 | EXPORT_SYMBOL(acpi_check_resource_conflict); |
| 1595 | |
| 1596 | int acpi_check_region(resource_size_t start, resource_size_t n, |
| 1597 | const char *name) |
| 1598 | { |
| 1599 | struct resource res = { |
| 1600 | .start = start, |
| 1601 | .end = start + n - 1, |
| 1602 | .name = name, |
| 1603 | .flags = IORESOURCE_IO, |
| 1604 | }; |
| 1605 | |
| 1606 | return acpi_check_resource_conflict(&res); |
| 1607 | } |
| 1608 | EXPORT_SYMBOL(acpi_check_region); |
| 1609 | |
| 1610 | /* |
| 1611 | * Let drivers know whether the resource checks are effective |
| 1612 | */ |
| 1613 | int acpi_resources_are_enforced(void) |
| 1614 | { |
| 1615 | return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT; |
| 1616 | } |
| 1617 | EXPORT_SYMBOL(acpi_resources_are_enforced); |
| 1618 | |
| 1619 | /* |
| 1620 | * Deallocate the memory for a spinlock. |
| 1621 | */ |
| 1622 | void acpi_os_delete_lock(acpi_spinlock handle) |
| 1623 | { |
| 1624 | ACPI_FREE(handle); |
| 1625 | } |
| 1626 | |
| 1627 | /* |
| 1628 | * Acquire a spinlock. |
| 1629 | * |
| 1630 | * handle is a pointer to the spinlock_t. |
| 1631 | */ |
| 1632 | |
| 1633 | acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp) |
| 1634 | { |
| 1635 | acpi_cpu_flags flags; |
| 1636 | spin_lock_irqsave(lockp, flags); |
| 1637 | return flags; |
| 1638 | } |
| 1639 | |
| 1640 | /* |
| 1641 | * Release a spinlock. See above. |
| 1642 | */ |
| 1643 | |
| 1644 | void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags) |
| 1645 | { |
| 1646 | spin_unlock_irqrestore(lockp, flags); |
| 1647 | } |
| 1648 | |
| 1649 | #ifndef ACPI_USE_LOCAL_CACHE |
| 1650 | |
| 1651 | /******************************************************************************* |
| 1652 | * |
| 1653 | * FUNCTION: acpi_os_create_cache |
| 1654 | * |
| 1655 | * PARAMETERS: name - Ascii name for the cache |
| 1656 | * size - Size of each cached object |
| 1657 | * depth - Maximum depth of the cache (in objects) <ignored> |
| 1658 | * cache - Where the new cache object is returned |
| 1659 | * |
| 1660 | * RETURN: status |
| 1661 | * |
| 1662 | * DESCRIPTION: Create a cache object |
| 1663 | * |
| 1664 | ******************************************************************************/ |
| 1665 | |
| 1666 | acpi_status |
| 1667 | acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache) |
| 1668 | { |
| 1669 | *cache = kmem_cache_create(name, size, 0, 0, NULL); |
| 1670 | if (*cache == NULL) |
| 1671 | return AE_ERROR; |
| 1672 | else |
| 1673 | return AE_OK; |
| 1674 | } |
| 1675 | |
| 1676 | /******************************************************************************* |
| 1677 | * |
| 1678 | * FUNCTION: acpi_os_purge_cache |
| 1679 | * |
| 1680 | * PARAMETERS: Cache - Handle to cache object |
| 1681 | * |
| 1682 | * RETURN: Status |
| 1683 | * |
| 1684 | * DESCRIPTION: Free all objects within the requested cache. |
| 1685 | * |
| 1686 | ******************************************************************************/ |
| 1687 | |
| 1688 | acpi_status acpi_os_purge_cache(acpi_cache_t * cache) |
| 1689 | { |
| 1690 | kmem_cache_shrink(cache); |
| 1691 | return (AE_OK); |
| 1692 | } |
| 1693 | |
| 1694 | /******************************************************************************* |
| 1695 | * |
| 1696 | * FUNCTION: acpi_os_delete_cache |
| 1697 | * |
| 1698 | * PARAMETERS: Cache - Handle to cache object |
| 1699 | * |
| 1700 | * RETURN: Status |
| 1701 | * |
| 1702 | * DESCRIPTION: Free all objects within the requested cache and delete the |
| 1703 | * cache object. |
| 1704 | * |
| 1705 | ******************************************************************************/ |
| 1706 | |
| 1707 | acpi_status acpi_os_delete_cache(acpi_cache_t * cache) |
| 1708 | { |
| 1709 | kmem_cache_destroy(cache); |
| 1710 | return (AE_OK); |
| 1711 | } |
| 1712 | |
| 1713 | /******************************************************************************* |
| 1714 | * |
| 1715 | * FUNCTION: acpi_os_release_object |
| 1716 | * |
| 1717 | * PARAMETERS: Cache - Handle to cache object |
| 1718 | * Object - The object to be released |
| 1719 | * |
| 1720 | * RETURN: None |
| 1721 | * |
| 1722 | * DESCRIPTION: Release an object to the specified cache. If cache is full, |
| 1723 | * the object is deleted. |
| 1724 | * |
| 1725 | ******************************************************************************/ |
| 1726 | |
| 1727 | acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object) |
| 1728 | { |
| 1729 | kmem_cache_free(cache, object); |
| 1730 | return (AE_OK); |
| 1731 | } |
| 1732 | #endif |
| 1733 | |
| 1734 | static int __init acpi_no_auto_ssdt_setup(char *s) |
| 1735 | { |
| 1736 | printk(KERN_NOTICE PREFIX "SSDT auto-load disabled\n"); |
| 1737 | |
| 1738 | acpi_gbl_disable_ssdt_table_load = TRUE; |
| 1739 | |
| 1740 | return 1; |
| 1741 | } |
| 1742 | |
| 1743 | __setup("acpi_no_auto_ssdt", acpi_no_auto_ssdt_setup); |
| 1744 | |
| 1745 | acpi_status __init acpi_os_initialize(void) |
| 1746 | { |
| 1747 | acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block); |
| 1748 | acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block); |
| 1749 | acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block); |
| 1750 | acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block); |
| 1751 | |
| 1752 | return AE_OK; |
| 1753 | } |
| 1754 | |
| 1755 | acpi_status __init acpi_os_initialize1(void) |
| 1756 | { |
| 1757 | kacpid_wq = alloc_workqueue("kacpid", 0, 1); |
| 1758 | kacpi_notify_wq = alloc_workqueue("kacpi_notify", 0, 1); |
| 1759 | kacpi_hotplug_wq = alloc_workqueue("kacpi_hotplug", 0, 1); |
| 1760 | BUG_ON(!kacpid_wq); |
| 1761 | BUG_ON(!kacpi_notify_wq); |
| 1762 | BUG_ON(!kacpi_hotplug_wq); |
| 1763 | acpi_install_interface_handler(acpi_osi_handler); |
| 1764 | acpi_osi_setup_late(); |
| 1765 | return AE_OK; |
| 1766 | } |
| 1767 | |
| 1768 | acpi_status acpi_os_terminate(void) |
| 1769 | { |
| 1770 | if (acpi_irq_handler) { |
| 1771 | acpi_os_remove_interrupt_handler(acpi_gbl_FADT.sci_interrupt, |
| 1772 | acpi_irq_handler); |
| 1773 | } |
| 1774 | |
| 1775 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe1_block); |
| 1776 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block); |
| 1777 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block); |
| 1778 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block); |
| 1779 | |
| 1780 | destroy_workqueue(kacpid_wq); |
| 1781 | destroy_workqueue(kacpi_notify_wq); |
| 1782 | destroy_workqueue(kacpi_hotplug_wq); |
| 1783 | |
| 1784 | return AE_OK; |
| 1785 | } |
| 1786 | |
| 1787 | acpi_status acpi_os_prepare_sleep(u8 sleep_state, u32 pm1a_control, |
| 1788 | u32 pm1b_control) |
| 1789 | { |
| 1790 | int rc = 0; |
| 1791 | if (__acpi_os_prepare_sleep) |
| 1792 | rc = __acpi_os_prepare_sleep(sleep_state, |
| 1793 | pm1a_control, pm1b_control); |
| 1794 | if (rc < 0) |
| 1795 | return AE_ERROR; |
| 1796 | else if (rc > 0) |
| 1797 | return AE_CTRL_SKIP; |
| 1798 | |
| 1799 | return AE_OK; |
| 1800 | } |
| 1801 | |
| 1802 | void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state, |
| 1803 | u32 pm1a_ctrl, u32 pm1b_ctrl)) |
| 1804 | { |
| 1805 | __acpi_os_prepare_sleep = func; |
| 1806 | } |
| 1807 | |
| 1808 | acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state, u32 val_a, |
| 1809 | u32 val_b) |
| 1810 | { |
| 1811 | int rc = 0; |
| 1812 | if (__acpi_os_prepare_extended_sleep) |
| 1813 | rc = __acpi_os_prepare_extended_sleep(sleep_state, |
| 1814 | val_a, val_b); |
| 1815 | if (rc < 0) |
| 1816 | return AE_ERROR; |
| 1817 | else if (rc > 0) |
| 1818 | return AE_CTRL_SKIP; |
| 1819 | |
| 1820 | return AE_OK; |
| 1821 | } |
| 1822 | |
| 1823 | void acpi_os_set_prepare_extended_sleep(int (*func)(u8 sleep_state, |
| 1824 | u32 val_a, u32 val_b)) |
| 1825 | { |
| 1826 | __acpi_os_prepare_extended_sleep = func; |
| 1827 | } |
| 1828 | |
| 1829 | |
| 1830 | void alloc_acpi_hp_work(acpi_handle handle, u32 type, void *context, |
| 1831 | void (*func)(struct work_struct *work)) |
| 1832 | { |
| 1833 | struct acpi_hp_work *hp_work; |
| 1834 | int ret; |
| 1835 | |
| 1836 | hp_work = kmalloc(sizeof(*hp_work), GFP_KERNEL); |
| 1837 | if (!hp_work) |
| 1838 | return; |
| 1839 | |
| 1840 | hp_work->handle = handle; |
| 1841 | hp_work->type = type; |
| 1842 | hp_work->context = context; |
| 1843 | |
| 1844 | INIT_WORK(&hp_work->work, func); |
| 1845 | ret = queue_work(kacpi_hotplug_wq, &hp_work->work); |
| 1846 | if (!ret) |
| 1847 | kfree(hp_work); |
| 1848 | } |
| 1849 | EXPORT_SYMBOL_GPL(alloc_acpi_hp_work); |