| 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 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 23 | * |
| 24 | */ |
| 25 | |
| 26 | #include <linux/module.h> |
| 27 | #include <linux/kernel.h> |
| 28 | #include <linux/slab.h> |
| 29 | #include <linux/mm.h> |
| 30 | #include <linux/highmem.h> |
| 31 | #include <linux/pci.h> |
| 32 | #include <linux/interrupt.h> |
| 33 | #include <linux/kmod.h> |
| 34 | #include <linux/delay.h> |
| 35 | #include <linux/workqueue.h> |
| 36 | #include <linux/nmi.h> |
| 37 | #include <linux/acpi.h> |
| 38 | #include <linux/efi.h> |
| 39 | #include <linux/ioport.h> |
| 40 | #include <linux/list.h> |
| 41 | #include <linux/jiffies.h> |
| 42 | #include <linux/semaphore.h> |
| 43 | |
| 44 | #include <asm/io.h> |
| 45 | #include <asm/uaccess.h> |
| 46 | #include <linux/io-64-nonatomic-lo-hi.h> |
| 47 | |
| 48 | #include "internal.h" |
| 49 | |
| 50 | #define _COMPONENT ACPI_OS_SERVICES |
| 51 | ACPI_MODULE_NAME("osl"); |
| 52 | |
| 53 | struct acpi_os_dpc { |
| 54 | acpi_osd_exec_callback function; |
| 55 | void *context; |
| 56 | struct work_struct work; |
| 57 | }; |
| 58 | |
| 59 | #ifdef ENABLE_DEBUGGER |
| 60 | #include <linux/kdb.h> |
| 61 | |
| 62 | /* stuff for debugger support */ |
| 63 | int acpi_in_debugger; |
| 64 | EXPORT_SYMBOL(acpi_in_debugger); |
| 65 | #endif /*ENABLE_DEBUGGER */ |
| 66 | |
| 67 | static int (*__acpi_os_prepare_sleep)(u8 sleep_state, u32 pm1a_ctrl, |
| 68 | u32 pm1b_ctrl); |
| 69 | static int (*__acpi_os_prepare_extended_sleep)(u8 sleep_state, u32 val_a, |
| 70 | u32 val_b); |
| 71 | |
| 72 | static acpi_osd_handler acpi_irq_handler; |
| 73 | static void *acpi_irq_context; |
| 74 | static struct workqueue_struct *kacpid_wq; |
| 75 | static struct workqueue_struct *kacpi_notify_wq; |
| 76 | static struct workqueue_struct *kacpi_hotplug_wq; |
| 77 | static bool acpi_os_initialized; |
| 78 | unsigned int acpi_sci_irq = INVALID_ACPI_IRQ; |
| 79 | |
| 80 | /* |
| 81 | * This list of permanent mappings is for memory that may be accessed from |
| 82 | * interrupt context, where we can't do the ioremap(). |
| 83 | */ |
| 84 | struct acpi_ioremap { |
| 85 | struct list_head list; |
| 86 | void __iomem *virt; |
| 87 | acpi_physical_address phys; |
| 88 | acpi_size size; |
| 89 | unsigned long refcount; |
| 90 | }; |
| 91 | |
| 92 | static LIST_HEAD(acpi_ioremaps); |
| 93 | static DEFINE_MUTEX(acpi_ioremap_lock); |
| 94 | |
| 95 | static void __init acpi_request_region (struct acpi_generic_address *gas, |
| 96 | unsigned int length, char *desc) |
| 97 | { |
| 98 | u64 addr; |
| 99 | |
| 100 | /* Handle possible alignment issues */ |
| 101 | memcpy(&addr, &gas->address, sizeof(addr)); |
| 102 | if (!addr || !length) |
| 103 | return; |
| 104 | |
| 105 | /* Resources are never freed */ |
| 106 | if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_IO) |
| 107 | request_region(addr, length, desc); |
| 108 | else if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) |
| 109 | request_mem_region(addr, length, desc); |
| 110 | } |
| 111 | |
| 112 | static int __init acpi_reserve_resources(void) |
| 113 | { |
| 114 | acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length, |
| 115 | "ACPI PM1a_EVT_BLK"); |
| 116 | |
| 117 | acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length, |
| 118 | "ACPI PM1b_EVT_BLK"); |
| 119 | |
| 120 | acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length, |
| 121 | "ACPI PM1a_CNT_BLK"); |
| 122 | |
| 123 | acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length, |
| 124 | "ACPI PM1b_CNT_BLK"); |
| 125 | |
| 126 | if (acpi_gbl_FADT.pm_timer_length == 4) |
| 127 | acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR"); |
| 128 | |
| 129 | acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length, |
| 130 | "ACPI PM2_CNT_BLK"); |
| 131 | |
| 132 | /* Length of GPE blocks must be a non-negative multiple of 2 */ |
| 133 | |
| 134 | if (!(acpi_gbl_FADT.gpe0_block_length & 0x1)) |
| 135 | acpi_request_region(&acpi_gbl_FADT.xgpe0_block, |
| 136 | acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK"); |
| 137 | |
| 138 | if (!(acpi_gbl_FADT.gpe1_block_length & 0x1)) |
| 139 | acpi_request_region(&acpi_gbl_FADT.xgpe1_block, |
| 140 | acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK"); |
| 141 | |
| 142 | return 0; |
| 143 | } |
| 144 | fs_initcall_sync(acpi_reserve_resources); |
| 145 | |
| 146 | void acpi_os_printf(const char *fmt, ...) |
| 147 | { |
| 148 | va_list args; |
| 149 | va_start(args, fmt); |
| 150 | acpi_os_vprintf(fmt, args); |
| 151 | va_end(args); |
| 152 | } |
| 153 | EXPORT_SYMBOL(acpi_os_printf); |
| 154 | |
| 155 | void acpi_os_vprintf(const char *fmt, va_list args) |
| 156 | { |
| 157 | static char buffer[512]; |
| 158 | |
| 159 | vsprintf(buffer, fmt, args); |
| 160 | |
| 161 | #ifdef ENABLE_DEBUGGER |
| 162 | if (acpi_in_debugger) { |
| 163 | kdb_printf("%s", buffer); |
| 164 | } else { |
| 165 | printk(KERN_CONT "%s", buffer); |
| 166 | } |
| 167 | #else |
| 168 | if (acpi_debugger_write_log(buffer) < 0) |
| 169 | printk(KERN_CONT "%s", buffer); |
| 170 | #endif |
| 171 | } |
| 172 | |
| 173 | #ifdef CONFIG_KEXEC |
| 174 | static unsigned long acpi_rsdp; |
| 175 | static int __init setup_acpi_rsdp(char *arg) |
| 176 | { |
| 177 | if (kstrtoul(arg, 16, &acpi_rsdp)) |
| 178 | return -EINVAL; |
| 179 | return 0; |
| 180 | } |
| 181 | early_param("acpi_rsdp", setup_acpi_rsdp); |
| 182 | #endif |
| 183 | |
| 184 | acpi_physical_address __init acpi_os_get_root_pointer(void) |
| 185 | { |
| 186 | #ifdef CONFIG_KEXEC |
| 187 | if (acpi_rsdp) |
| 188 | return acpi_rsdp; |
| 189 | #endif |
| 190 | |
| 191 | if (efi_enabled(EFI_CONFIG_TABLES)) { |
| 192 | if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) |
| 193 | return efi.acpi20; |
| 194 | else if (efi.acpi != EFI_INVALID_TABLE_ADDR) |
| 195 | return efi.acpi; |
| 196 | else { |
| 197 | printk(KERN_ERR PREFIX |
| 198 | "System description tables not found\n"); |
| 199 | return 0; |
| 200 | } |
| 201 | } else if (IS_ENABLED(CONFIG_ACPI_LEGACY_TABLES_LOOKUP)) { |
| 202 | acpi_physical_address pa = 0; |
| 203 | |
| 204 | acpi_find_root_pointer(&pa); |
| 205 | return pa; |
| 206 | } |
| 207 | |
| 208 | return 0; |
| 209 | } |
| 210 | |
| 211 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ |
| 212 | static struct acpi_ioremap * |
| 213 | acpi_map_lookup(acpi_physical_address phys, acpi_size size) |
| 214 | { |
| 215 | struct acpi_ioremap *map; |
| 216 | |
| 217 | list_for_each_entry_rcu(map, &acpi_ioremaps, list) |
| 218 | if (map->phys <= phys && |
| 219 | phys + size <= map->phys + map->size) |
| 220 | return map; |
| 221 | |
| 222 | return NULL; |
| 223 | } |
| 224 | |
| 225 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ |
| 226 | static void __iomem * |
| 227 | acpi_map_vaddr_lookup(acpi_physical_address phys, unsigned int size) |
| 228 | { |
| 229 | struct acpi_ioremap *map; |
| 230 | |
| 231 | map = acpi_map_lookup(phys, size); |
| 232 | if (map) |
| 233 | return map->virt + (phys - map->phys); |
| 234 | |
| 235 | return NULL; |
| 236 | } |
| 237 | |
| 238 | void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size) |
| 239 | { |
| 240 | struct acpi_ioremap *map; |
| 241 | void __iomem *virt = NULL; |
| 242 | |
| 243 | mutex_lock(&acpi_ioremap_lock); |
| 244 | map = acpi_map_lookup(phys, size); |
| 245 | if (map) { |
| 246 | virt = map->virt + (phys - map->phys); |
| 247 | map->refcount++; |
| 248 | } |
| 249 | mutex_unlock(&acpi_ioremap_lock); |
| 250 | return virt; |
| 251 | } |
| 252 | EXPORT_SYMBOL_GPL(acpi_os_get_iomem); |
| 253 | |
| 254 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ |
| 255 | static struct acpi_ioremap * |
| 256 | acpi_map_lookup_virt(void __iomem *virt, acpi_size size) |
| 257 | { |
| 258 | struct acpi_ioremap *map; |
| 259 | |
| 260 | list_for_each_entry_rcu(map, &acpi_ioremaps, list) |
| 261 | if (map->virt <= virt && |
| 262 | virt + size <= map->virt + map->size) |
| 263 | return map; |
| 264 | |
| 265 | return NULL; |
| 266 | } |
| 267 | |
| 268 | #if defined(CONFIG_IA64) || defined(CONFIG_ARM64) |
| 269 | /* ioremap will take care of cache attributes */ |
| 270 | #define should_use_kmap(pfn) 0 |
| 271 | #else |
| 272 | #define should_use_kmap(pfn) page_is_ram(pfn) |
| 273 | #endif |
| 274 | |
| 275 | static void __iomem *acpi_map(acpi_physical_address pg_off, unsigned long pg_sz) |
| 276 | { |
| 277 | unsigned long pfn; |
| 278 | |
| 279 | pfn = pg_off >> PAGE_SHIFT; |
| 280 | if (should_use_kmap(pfn)) { |
| 281 | if (pg_sz > PAGE_SIZE) |
| 282 | return NULL; |
| 283 | return (void __iomem __force *)kmap(pfn_to_page(pfn)); |
| 284 | } else |
| 285 | return acpi_os_ioremap(pg_off, pg_sz); |
| 286 | } |
| 287 | |
| 288 | static void acpi_unmap(acpi_physical_address pg_off, void __iomem *vaddr) |
| 289 | { |
| 290 | unsigned long pfn; |
| 291 | |
| 292 | pfn = pg_off >> PAGE_SHIFT; |
| 293 | if (should_use_kmap(pfn)) |
| 294 | kunmap(pfn_to_page(pfn)); |
| 295 | else |
| 296 | iounmap(vaddr); |
| 297 | } |
| 298 | |
| 299 | /** |
| 300 | * acpi_os_map_iomem - Get a virtual address for a given physical address range. |
| 301 | * @phys: Start of the physical address range to map. |
| 302 | * @size: Size of the physical address range to map. |
| 303 | * |
| 304 | * Look up the given physical address range in the list of existing ACPI memory |
| 305 | * mappings. If found, get a reference to it and return a pointer to it (its |
| 306 | * virtual address). If not found, map it, add it to that list and return a |
| 307 | * pointer to it. |
| 308 | * |
| 309 | * During early init (when acpi_gbl_permanent_mmap has not been set yet) this |
| 310 | * routine simply calls __acpi_map_table() to get the job done. |
| 311 | */ |
| 312 | void __iomem *__init_refok |
| 313 | acpi_os_map_iomem(acpi_physical_address phys, acpi_size size) |
| 314 | { |
| 315 | struct acpi_ioremap *map; |
| 316 | void __iomem *virt; |
| 317 | acpi_physical_address pg_off; |
| 318 | acpi_size pg_sz; |
| 319 | |
| 320 | if (phys > ULONG_MAX) { |
| 321 | printk(KERN_ERR PREFIX "Cannot map memory that high\n"); |
| 322 | return NULL; |
| 323 | } |
| 324 | |
| 325 | if (!acpi_gbl_permanent_mmap) |
| 326 | return __acpi_map_table((unsigned long)phys, size); |
| 327 | |
| 328 | mutex_lock(&acpi_ioremap_lock); |
| 329 | /* Check if there's a suitable mapping already. */ |
| 330 | map = acpi_map_lookup(phys, size); |
| 331 | if (map) { |
| 332 | map->refcount++; |
| 333 | goto out; |
| 334 | } |
| 335 | |
| 336 | map = kzalloc(sizeof(*map), GFP_KERNEL); |
| 337 | if (!map) { |
| 338 | mutex_unlock(&acpi_ioremap_lock); |
| 339 | return NULL; |
| 340 | } |
| 341 | |
| 342 | pg_off = round_down(phys, PAGE_SIZE); |
| 343 | pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off; |
| 344 | virt = acpi_map(pg_off, pg_sz); |
| 345 | if (!virt) { |
| 346 | mutex_unlock(&acpi_ioremap_lock); |
| 347 | kfree(map); |
| 348 | return NULL; |
| 349 | } |
| 350 | |
| 351 | INIT_LIST_HEAD(&map->list); |
| 352 | map->virt = virt; |
| 353 | map->phys = pg_off; |
| 354 | map->size = pg_sz; |
| 355 | map->refcount = 1; |
| 356 | |
| 357 | list_add_tail_rcu(&map->list, &acpi_ioremaps); |
| 358 | |
| 359 | out: |
| 360 | mutex_unlock(&acpi_ioremap_lock); |
| 361 | return map->virt + (phys - map->phys); |
| 362 | } |
| 363 | EXPORT_SYMBOL_GPL(acpi_os_map_iomem); |
| 364 | |
| 365 | void *__init_refok |
| 366 | acpi_os_map_memory(acpi_physical_address phys, acpi_size size) |
| 367 | { |
| 368 | return (void *)acpi_os_map_iomem(phys, size); |
| 369 | } |
| 370 | EXPORT_SYMBOL_GPL(acpi_os_map_memory); |
| 371 | |
| 372 | static void acpi_os_drop_map_ref(struct acpi_ioremap *map) |
| 373 | { |
| 374 | if (!--map->refcount) |
| 375 | list_del_rcu(&map->list); |
| 376 | } |
| 377 | |
| 378 | static void acpi_os_map_cleanup(struct acpi_ioremap *map) |
| 379 | { |
| 380 | if (!map->refcount) { |
| 381 | synchronize_rcu_expedited(); |
| 382 | acpi_unmap(map->phys, map->virt); |
| 383 | kfree(map); |
| 384 | } |
| 385 | } |
| 386 | |
| 387 | /** |
| 388 | * acpi_os_unmap_iomem - Drop a memory mapping reference. |
| 389 | * @virt: Start of the address range to drop a reference to. |
| 390 | * @size: Size of the address range to drop a reference to. |
| 391 | * |
| 392 | * Look up the given virtual address range in the list of existing ACPI memory |
| 393 | * mappings, drop a reference to it and unmap it if there are no more active |
| 394 | * references to it. |
| 395 | * |
| 396 | * During early init (when acpi_gbl_permanent_mmap has not been set yet) this |
| 397 | * routine simply calls __acpi_unmap_table() to get the job done. Since |
| 398 | * __acpi_unmap_table() is an __init function, the __ref annotation is needed |
| 399 | * here. |
| 400 | */ |
| 401 | void __ref acpi_os_unmap_iomem(void __iomem *virt, acpi_size size) |
| 402 | { |
| 403 | struct acpi_ioremap *map; |
| 404 | |
| 405 | if (!acpi_gbl_permanent_mmap) { |
| 406 | __acpi_unmap_table(virt, size); |
| 407 | return; |
| 408 | } |
| 409 | |
| 410 | mutex_lock(&acpi_ioremap_lock); |
| 411 | map = acpi_map_lookup_virt(virt, size); |
| 412 | if (!map) { |
| 413 | mutex_unlock(&acpi_ioremap_lock); |
| 414 | WARN(true, PREFIX "%s: bad address %p\n", __func__, virt); |
| 415 | return; |
| 416 | } |
| 417 | acpi_os_drop_map_ref(map); |
| 418 | mutex_unlock(&acpi_ioremap_lock); |
| 419 | |
| 420 | acpi_os_map_cleanup(map); |
| 421 | } |
| 422 | EXPORT_SYMBOL_GPL(acpi_os_unmap_iomem); |
| 423 | |
| 424 | void __ref acpi_os_unmap_memory(void *virt, acpi_size size) |
| 425 | { |
| 426 | return acpi_os_unmap_iomem((void __iomem *)virt, size); |
| 427 | } |
| 428 | EXPORT_SYMBOL_GPL(acpi_os_unmap_memory); |
| 429 | |
| 430 | void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size) |
| 431 | { |
| 432 | if (!acpi_gbl_permanent_mmap) |
| 433 | __acpi_unmap_table(virt, size); |
| 434 | } |
| 435 | |
| 436 | int acpi_os_map_generic_address(struct acpi_generic_address *gas) |
| 437 | { |
| 438 | u64 addr; |
| 439 | void __iomem *virt; |
| 440 | |
| 441 | if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) |
| 442 | return 0; |
| 443 | |
| 444 | /* Handle possible alignment issues */ |
| 445 | memcpy(&addr, &gas->address, sizeof(addr)); |
| 446 | if (!addr || !gas->bit_width) |
| 447 | return -EINVAL; |
| 448 | |
| 449 | virt = acpi_os_map_iomem(addr, gas->bit_width / 8); |
| 450 | if (!virt) |
| 451 | return -EIO; |
| 452 | |
| 453 | return 0; |
| 454 | } |
| 455 | EXPORT_SYMBOL(acpi_os_map_generic_address); |
| 456 | |
| 457 | void acpi_os_unmap_generic_address(struct acpi_generic_address *gas) |
| 458 | { |
| 459 | u64 addr; |
| 460 | struct acpi_ioremap *map; |
| 461 | |
| 462 | if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) |
| 463 | return; |
| 464 | |
| 465 | /* Handle possible alignment issues */ |
| 466 | memcpy(&addr, &gas->address, sizeof(addr)); |
| 467 | if (!addr || !gas->bit_width) |
| 468 | return; |
| 469 | |
| 470 | mutex_lock(&acpi_ioremap_lock); |
| 471 | map = acpi_map_lookup(addr, gas->bit_width / 8); |
| 472 | if (!map) { |
| 473 | mutex_unlock(&acpi_ioremap_lock); |
| 474 | return; |
| 475 | } |
| 476 | acpi_os_drop_map_ref(map); |
| 477 | mutex_unlock(&acpi_ioremap_lock); |
| 478 | |
| 479 | acpi_os_map_cleanup(map); |
| 480 | } |
| 481 | EXPORT_SYMBOL(acpi_os_unmap_generic_address); |
| 482 | |
| 483 | #ifdef ACPI_FUTURE_USAGE |
| 484 | acpi_status |
| 485 | acpi_os_get_physical_address(void *virt, acpi_physical_address * phys) |
| 486 | { |
| 487 | if (!phys || !virt) |
| 488 | return AE_BAD_PARAMETER; |
| 489 | |
| 490 | *phys = virt_to_phys(virt); |
| 491 | |
| 492 | return AE_OK; |
| 493 | } |
| 494 | #endif |
| 495 | |
| 496 | #ifdef CONFIG_ACPI_REV_OVERRIDE_POSSIBLE |
| 497 | static bool acpi_rev_override; |
| 498 | |
| 499 | int __init acpi_rev_override_setup(char *str) |
| 500 | { |
| 501 | acpi_rev_override = true; |
| 502 | return 1; |
| 503 | } |
| 504 | __setup("acpi_rev_override", acpi_rev_override_setup); |
| 505 | #else |
| 506 | #define acpi_rev_override false |
| 507 | #endif |
| 508 | |
| 509 | #define ACPI_MAX_OVERRIDE_LEN 100 |
| 510 | |
| 511 | static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN]; |
| 512 | |
| 513 | acpi_status |
| 514 | acpi_os_predefined_override(const struct acpi_predefined_names *init_val, |
| 515 | acpi_string *new_val) |
| 516 | { |
| 517 | if (!init_val || !new_val) |
| 518 | return AE_BAD_PARAMETER; |
| 519 | |
| 520 | *new_val = NULL; |
| 521 | if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) { |
| 522 | printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n", |
| 523 | acpi_os_name); |
| 524 | *new_val = acpi_os_name; |
| 525 | } |
| 526 | |
| 527 | if (!memcmp(init_val->name, "_REV", 4) && acpi_rev_override) { |
| 528 | printk(KERN_INFO PREFIX "Overriding _REV return value to 5\n"); |
| 529 | *new_val = (char *)5; |
| 530 | } |
| 531 | |
| 532 | return AE_OK; |
| 533 | } |
| 534 | |
| 535 | static irqreturn_t acpi_irq(int irq, void *dev_id) |
| 536 | { |
| 537 | u32 handled; |
| 538 | |
| 539 | handled = (*acpi_irq_handler) (acpi_irq_context); |
| 540 | |
| 541 | if (handled) { |
| 542 | acpi_irq_handled++; |
| 543 | return IRQ_HANDLED; |
| 544 | } else { |
| 545 | acpi_irq_not_handled++; |
| 546 | return IRQ_NONE; |
| 547 | } |
| 548 | } |
| 549 | |
| 550 | acpi_status |
| 551 | acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler, |
| 552 | void *context) |
| 553 | { |
| 554 | unsigned int irq; |
| 555 | |
| 556 | acpi_irq_stats_init(); |
| 557 | |
| 558 | /* |
| 559 | * ACPI interrupts different from the SCI in our copy of the FADT are |
| 560 | * not supported. |
| 561 | */ |
| 562 | if (gsi != acpi_gbl_FADT.sci_interrupt) |
| 563 | return AE_BAD_PARAMETER; |
| 564 | |
| 565 | if (acpi_irq_handler) |
| 566 | return AE_ALREADY_ACQUIRED; |
| 567 | |
| 568 | if (acpi_gsi_to_irq(gsi, &irq) < 0) { |
| 569 | printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n", |
| 570 | gsi); |
| 571 | return AE_OK; |
| 572 | } |
| 573 | |
| 574 | acpi_irq_handler = handler; |
| 575 | acpi_irq_context = context; |
| 576 | if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) { |
| 577 | printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq); |
| 578 | acpi_irq_handler = NULL; |
| 579 | return AE_NOT_ACQUIRED; |
| 580 | } |
| 581 | acpi_sci_irq = irq; |
| 582 | |
| 583 | return AE_OK; |
| 584 | } |
| 585 | |
| 586 | acpi_status acpi_os_remove_interrupt_handler(u32 gsi, acpi_osd_handler handler) |
| 587 | { |
| 588 | if (gsi != acpi_gbl_FADT.sci_interrupt || !acpi_sci_irq_valid()) |
| 589 | return AE_BAD_PARAMETER; |
| 590 | |
| 591 | free_irq(acpi_sci_irq, acpi_irq); |
| 592 | acpi_irq_handler = NULL; |
| 593 | acpi_sci_irq = INVALID_ACPI_IRQ; |
| 594 | |
| 595 | return AE_OK; |
| 596 | } |
| 597 | |
| 598 | /* |
| 599 | * Running in interpreter thread context, safe to sleep |
| 600 | */ |
| 601 | |
| 602 | void acpi_os_sleep(u64 ms) |
| 603 | { |
| 604 | msleep(ms); |
| 605 | } |
| 606 | |
| 607 | void acpi_os_stall(u32 us) |
| 608 | { |
| 609 | while (us) { |
| 610 | u32 delay = 1000; |
| 611 | |
| 612 | if (delay > us) |
| 613 | delay = us; |
| 614 | udelay(delay); |
| 615 | touch_nmi_watchdog(); |
| 616 | us -= delay; |
| 617 | } |
| 618 | } |
| 619 | |
| 620 | /* |
| 621 | * Support ACPI 3.0 AML Timer operand |
| 622 | * Returns 64-bit free-running, monotonically increasing timer |
| 623 | * with 100ns granularity |
| 624 | */ |
| 625 | u64 acpi_os_get_timer(void) |
| 626 | { |
| 627 | u64 time_ns = ktime_to_ns(ktime_get()); |
| 628 | do_div(time_ns, 100); |
| 629 | return time_ns; |
| 630 | } |
| 631 | |
| 632 | acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width) |
| 633 | { |
| 634 | u32 dummy; |
| 635 | |
| 636 | if (!value) |
| 637 | value = &dummy; |
| 638 | |
| 639 | *value = 0; |
| 640 | if (width <= 8) { |
| 641 | *(u8 *) value = inb(port); |
| 642 | } else if (width <= 16) { |
| 643 | *(u16 *) value = inw(port); |
| 644 | } else if (width <= 32) { |
| 645 | *(u32 *) value = inl(port); |
| 646 | } else { |
| 647 | BUG(); |
| 648 | } |
| 649 | |
| 650 | return AE_OK; |
| 651 | } |
| 652 | |
| 653 | EXPORT_SYMBOL(acpi_os_read_port); |
| 654 | |
| 655 | acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width) |
| 656 | { |
| 657 | if (width <= 8) { |
| 658 | outb(value, port); |
| 659 | } else if (width <= 16) { |
| 660 | outw(value, port); |
| 661 | } else if (width <= 32) { |
| 662 | outl(value, port); |
| 663 | } else { |
| 664 | BUG(); |
| 665 | } |
| 666 | |
| 667 | return AE_OK; |
| 668 | } |
| 669 | |
| 670 | EXPORT_SYMBOL(acpi_os_write_port); |
| 671 | |
| 672 | acpi_status |
| 673 | acpi_os_read_memory(acpi_physical_address phys_addr, u64 *value, u32 width) |
| 674 | { |
| 675 | void __iomem *virt_addr; |
| 676 | unsigned int size = width / 8; |
| 677 | bool unmap = false; |
| 678 | u64 dummy; |
| 679 | |
| 680 | rcu_read_lock(); |
| 681 | virt_addr = acpi_map_vaddr_lookup(phys_addr, size); |
| 682 | if (!virt_addr) { |
| 683 | rcu_read_unlock(); |
| 684 | virt_addr = acpi_os_ioremap(phys_addr, size); |
| 685 | if (!virt_addr) |
| 686 | return AE_BAD_ADDRESS; |
| 687 | unmap = true; |
| 688 | } |
| 689 | |
| 690 | if (!value) |
| 691 | value = &dummy; |
| 692 | |
| 693 | switch (width) { |
| 694 | case 8: |
| 695 | *(u8 *) value = readb(virt_addr); |
| 696 | break; |
| 697 | case 16: |
| 698 | *(u16 *) value = readw(virt_addr); |
| 699 | break; |
| 700 | case 32: |
| 701 | *(u32 *) value = readl(virt_addr); |
| 702 | break; |
| 703 | case 64: |
| 704 | *(u64 *) value = readq(virt_addr); |
| 705 | break; |
| 706 | default: |
| 707 | BUG(); |
| 708 | } |
| 709 | |
| 710 | if (unmap) |
| 711 | iounmap(virt_addr); |
| 712 | else |
| 713 | rcu_read_unlock(); |
| 714 | |
| 715 | return AE_OK; |
| 716 | } |
| 717 | |
| 718 | acpi_status |
| 719 | acpi_os_write_memory(acpi_physical_address phys_addr, u64 value, u32 width) |
| 720 | { |
| 721 | void __iomem *virt_addr; |
| 722 | unsigned int size = width / 8; |
| 723 | bool unmap = false; |
| 724 | |
| 725 | rcu_read_lock(); |
| 726 | virt_addr = acpi_map_vaddr_lookup(phys_addr, size); |
| 727 | if (!virt_addr) { |
| 728 | rcu_read_unlock(); |
| 729 | virt_addr = acpi_os_ioremap(phys_addr, size); |
| 730 | if (!virt_addr) |
| 731 | return AE_BAD_ADDRESS; |
| 732 | unmap = true; |
| 733 | } |
| 734 | |
| 735 | switch (width) { |
| 736 | case 8: |
| 737 | writeb(value, virt_addr); |
| 738 | break; |
| 739 | case 16: |
| 740 | writew(value, virt_addr); |
| 741 | break; |
| 742 | case 32: |
| 743 | writel(value, virt_addr); |
| 744 | break; |
| 745 | case 64: |
| 746 | writeq(value, virt_addr); |
| 747 | break; |
| 748 | default: |
| 749 | BUG(); |
| 750 | } |
| 751 | |
| 752 | if (unmap) |
| 753 | iounmap(virt_addr); |
| 754 | else |
| 755 | rcu_read_unlock(); |
| 756 | |
| 757 | return AE_OK; |
| 758 | } |
| 759 | |
| 760 | acpi_status |
| 761 | acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
| 762 | u64 *value, u32 width) |
| 763 | { |
| 764 | int result, size; |
| 765 | u32 value32; |
| 766 | |
| 767 | if (!value) |
| 768 | return AE_BAD_PARAMETER; |
| 769 | |
| 770 | switch (width) { |
| 771 | case 8: |
| 772 | size = 1; |
| 773 | break; |
| 774 | case 16: |
| 775 | size = 2; |
| 776 | break; |
| 777 | case 32: |
| 778 | size = 4; |
| 779 | break; |
| 780 | default: |
| 781 | return AE_ERROR; |
| 782 | } |
| 783 | |
| 784 | result = raw_pci_read(pci_id->segment, pci_id->bus, |
| 785 | PCI_DEVFN(pci_id->device, pci_id->function), |
| 786 | reg, size, &value32); |
| 787 | *value = value32; |
| 788 | |
| 789 | return (result ? AE_ERROR : AE_OK); |
| 790 | } |
| 791 | |
| 792 | acpi_status |
| 793 | acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
| 794 | u64 value, u32 width) |
| 795 | { |
| 796 | int result, size; |
| 797 | |
| 798 | switch (width) { |
| 799 | case 8: |
| 800 | size = 1; |
| 801 | break; |
| 802 | case 16: |
| 803 | size = 2; |
| 804 | break; |
| 805 | case 32: |
| 806 | size = 4; |
| 807 | break; |
| 808 | default: |
| 809 | return AE_ERROR; |
| 810 | } |
| 811 | |
| 812 | result = raw_pci_write(pci_id->segment, pci_id->bus, |
| 813 | PCI_DEVFN(pci_id->device, pci_id->function), |
| 814 | reg, size, value); |
| 815 | |
| 816 | return (result ? AE_ERROR : AE_OK); |
| 817 | } |
| 818 | |
| 819 | static void acpi_os_execute_deferred(struct work_struct *work) |
| 820 | { |
| 821 | struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work); |
| 822 | |
| 823 | dpc->function(dpc->context); |
| 824 | kfree(dpc); |
| 825 | } |
| 826 | |
| 827 | #ifdef CONFIG_ACPI_DEBUGGER |
| 828 | static struct acpi_debugger acpi_debugger; |
| 829 | static bool acpi_debugger_initialized; |
| 830 | |
| 831 | int acpi_register_debugger(struct module *owner, |
| 832 | const struct acpi_debugger_ops *ops) |
| 833 | { |
| 834 | int ret = 0; |
| 835 | |
| 836 | mutex_lock(&acpi_debugger.lock); |
| 837 | if (acpi_debugger.ops) { |
| 838 | ret = -EBUSY; |
| 839 | goto err_lock; |
| 840 | } |
| 841 | |
| 842 | acpi_debugger.owner = owner; |
| 843 | acpi_debugger.ops = ops; |
| 844 | |
| 845 | err_lock: |
| 846 | mutex_unlock(&acpi_debugger.lock); |
| 847 | return ret; |
| 848 | } |
| 849 | EXPORT_SYMBOL(acpi_register_debugger); |
| 850 | |
| 851 | void acpi_unregister_debugger(const struct acpi_debugger_ops *ops) |
| 852 | { |
| 853 | mutex_lock(&acpi_debugger.lock); |
| 854 | if (ops == acpi_debugger.ops) { |
| 855 | acpi_debugger.ops = NULL; |
| 856 | acpi_debugger.owner = NULL; |
| 857 | } |
| 858 | mutex_unlock(&acpi_debugger.lock); |
| 859 | } |
| 860 | EXPORT_SYMBOL(acpi_unregister_debugger); |
| 861 | |
| 862 | int acpi_debugger_create_thread(acpi_osd_exec_callback function, void *context) |
| 863 | { |
| 864 | int ret; |
| 865 | int (*func)(acpi_osd_exec_callback, void *); |
| 866 | struct module *owner; |
| 867 | |
| 868 | if (!acpi_debugger_initialized) |
| 869 | return -ENODEV; |
| 870 | mutex_lock(&acpi_debugger.lock); |
| 871 | if (!acpi_debugger.ops) { |
| 872 | ret = -ENODEV; |
| 873 | goto err_lock; |
| 874 | } |
| 875 | if (!try_module_get(acpi_debugger.owner)) { |
| 876 | ret = -ENODEV; |
| 877 | goto err_lock; |
| 878 | } |
| 879 | func = acpi_debugger.ops->create_thread; |
| 880 | owner = acpi_debugger.owner; |
| 881 | mutex_unlock(&acpi_debugger.lock); |
| 882 | |
| 883 | ret = func(function, context); |
| 884 | |
| 885 | mutex_lock(&acpi_debugger.lock); |
| 886 | module_put(owner); |
| 887 | err_lock: |
| 888 | mutex_unlock(&acpi_debugger.lock); |
| 889 | return ret; |
| 890 | } |
| 891 | |
| 892 | ssize_t acpi_debugger_write_log(const char *msg) |
| 893 | { |
| 894 | ssize_t ret; |
| 895 | ssize_t (*func)(const char *); |
| 896 | struct module *owner; |
| 897 | |
| 898 | if (!acpi_debugger_initialized) |
| 899 | return -ENODEV; |
| 900 | mutex_lock(&acpi_debugger.lock); |
| 901 | if (!acpi_debugger.ops) { |
| 902 | ret = -ENODEV; |
| 903 | goto err_lock; |
| 904 | } |
| 905 | if (!try_module_get(acpi_debugger.owner)) { |
| 906 | ret = -ENODEV; |
| 907 | goto err_lock; |
| 908 | } |
| 909 | func = acpi_debugger.ops->write_log; |
| 910 | owner = acpi_debugger.owner; |
| 911 | mutex_unlock(&acpi_debugger.lock); |
| 912 | |
| 913 | ret = func(msg); |
| 914 | |
| 915 | mutex_lock(&acpi_debugger.lock); |
| 916 | module_put(owner); |
| 917 | err_lock: |
| 918 | mutex_unlock(&acpi_debugger.lock); |
| 919 | return ret; |
| 920 | } |
| 921 | |
| 922 | ssize_t acpi_debugger_read_cmd(char *buffer, size_t buffer_length) |
| 923 | { |
| 924 | ssize_t ret; |
| 925 | ssize_t (*func)(char *, size_t); |
| 926 | struct module *owner; |
| 927 | |
| 928 | if (!acpi_debugger_initialized) |
| 929 | return -ENODEV; |
| 930 | mutex_lock(&acpi_debugger.lock); |
| 931 | if (!acpi_debugger.ops) { |
| 932 | ret = -ENODEV; |
| 933 | goto err_lock; |
| 934 | } |
| 935 | if (!try_module_get(acpi_debugger.owner)) { |
| 936 | ret = -ENODEV; |
| 937 | goto err_lock; |
| 938 | } |
| 939 | func = acpi_debugger.ops->read_cmd; |
| 940 | owner = acpi_debugger.owner; |
| 941 | mutex_unlock(&acpi_debugger.lock); |
| 942 | |
| 943 | ret = func(buffer, buffer_length); |
| 944 | |
| 945 | mutex_lock(&acpi_debugger.lock); |
| 946 | module_put(owner); |
| 947 | err_lock: |
| 948 | mutex_unlock(&acpi_debugger.lock); |
| 949 | return ret; |
| 950 | } |
| 951 | |
| 952 | int acpi_debugger_wait_command_ready(void) |
| 953 | { |
| 954 | int ret; |
| 955 | int (*func)(bool, char *, size_t); |
| 956 | struct module *owner; |
| 957 | |
| 958 | if (!acpi_debugger_initialized) |
| 959 | return -ENODEV; |
| 960 | mutex_lock(&acpi_debugger.lock); |
| 961 | if (!acpi_debugger.ops) { |
| 962 | ret = -ENODEV; |
| 963 | goto err_lock; |
| 964 | } |
| 965 | if (!try_module_get(acpi_debugger.owner)) { |
| 966 | ret = -ENODEV; |
| 967 | goto err_lock; |
| 968 | } |
| 969 | func = acpi_debugger.ops->wait_command_ready; |
| 970 | owner = acpi_debugger.owner; |
| 971 | mutex_unlock(&acpi_debugger.lock); |
| 972 | |
| 973 | ret = func(acpi_gbl_method_executing, |
| 974 | acpi_gbl_db_line_buf, ACPI_DB_LINE_BUFFER_SIZE); |
| 975 | |
| 976 | mutex_lock(&acpi_debugger.lock); |
| 977 | module_put(owner); |
| 978 | err_lock: |
| 979 | mutex_unlock(&acpi_debugger.lock); |
| 980 | return ret; |
| 981 | } |
| 982 | |
| 983 | int acpi_debugger_notify_command_complete(void) |
| 984 | { |
| 985 | int ret; |
| 986 | int (*func)(void); |
| 987 | struct module *owner; |
| 988 | |
| 989 | if (!acpi_debugger_initialized) |
| 990 | return -ENODEV; |
| 991 | mutex_lock(&acpi_debugger.lock); |
| 992 | if (!acpi_debugger.ops) { |
| 993 | ret = -ENODEV; |
| 994 | goto err_lock; |
| 995 | } |
| 996 | if (!try_module_get(acpi_debugger.owner)) { |
| 997 | ret = -ENODEV; |
| 998 | goto err_lock; |
| 999 | } |
| 1000 | func = acpi_debugger.ops->notify_command_complete; |
| 1001 | owner = acpi_debugger.owner; |
| 1002 | mutex_unlock(&acpi_debugger.lock); |
| 1003 | |
| 1004 | ret = func(); |
| 1005 | |
| 1006 | mutex_lock(&acpi_debugger.lock); |
| 1007 | module_put(owner); |
| 1008 | err_lock: |
| 1009 | mutex_unlock(&acpi_debugger.lock); |
| 1010 | return ret; |
| 1011 | } |
| 1012 | |
| 1013 | int __init acpi_debugger_init(void) |
| 1014 | { |
| 1015 | mutex_init(&acpi_debugger.lock); |
| 1016 | acpi_debugger_initialized = true; |
| 1017 | return 0; |
| 1018 | } |
| 1019 | #endif |
| 1020 | |
| 1021 | /******************************************************************************* |
| 1022 | * |
| 1023 | * FUNCTION: acpi_os_execute |
| 1024 | * |
| 1025 | * PARAMETERS: Type - Type of the callback |
| 1026 | * Function - Function to be executed |
| 1027 | * Context - Function parameters |
| 1028 | * |
| 1029 | * RETURN: Status |
| 1030 | * |
| 1031 | * DESCRIPTION: Depending on type, either queues function for deferred execution or |
| 1032 | * immediately executes function on a separate thread. |
| 1033 | * |
| 1034 | ******************************************************************************/ |
| 1035 | |
| 1036 | acpi_status acpi_os_execute(acpi_execute_type type, |
| 1037 | acpi_osd_exec_callback function, void *context) |
| 1038 | { |
| 1039 | acpi_status status = AE_OK; |
| 1040 | struct acpi_os_dpc *dpc; |
| 1041 | struct workqueue_struct *queue; |
| 1042 | int ret; |
| 1043 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
| 1044 | "Scheduling function [%p(%p)] for deferred execution.\n", |
| 1045 | function, context)); |
| 1046 | |
| 1047 | if (type == OSL_DEBUGGER_MAIN_THREAD) { |
| 1048 | ret = acpi_debugger_create_thread(function, context); |
| 1049 | if (ret) { |
| 1050 | pr_err("Call to kthread_create() failed.\n"); |
| 1051 | status = AE_ERROR; |
| 1052 | } |
| 1053 | goto out_thread; |
| 1054 | } |
| 1055 | |
| 1056 | /* |
| 1057 | * Allocate/initialize DPC structure. Note that this memory will be |
| 1058 | * freed by the callee. The kernel handles the work_struct list in a |
| 1059 | * way that allows us to also free its memory inside the callee. |
| 1060 | * Because we may want to schedule several tasks with different |
| 1061 | * parameters we can't use the approach some kernel code uses of |
| 1062 | * having a static work_struct. |
| 1063 | */ |
| 1064 | |
| 1065 | dpc = kzalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC); |
| 1066 | if (!dpc) |
| 1067 | return AE_NO_MEMORY; |
| 1068 | |
| 1069 | dpc->function = function; |
| 1070 | dpc->context = context; |
| 1071 | |
| 1072 | /* |
| 1073 | * To prevent lockdep from complaining unnecessarily, make sure that |
| 1074 | * there is a different static lockdep key for each workqueue by using |
| 1075 | * INIT_WORK() for each of them separately. |
| 1076 | */ |
| 1077 | if (type == OSL_NOTIFY_HANDLER) { |
| 1078 | queue = kacpi_notify_wq; |
| 1079 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); |
| 1080 | } else if (type == OSL_GPE_HANDLER) { |
| 1081 | queue = kacpid_wq; |
| 1082 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); |
| 1083 | } else { |
| 1084 | pr_err("Unsupported os_execute type %d.\n", type); |
| 1085 | status = AE_ERROR; |
| 1086 | } |
| 1087 | |
| 1088 | if (ACPI_FAILURE(status)) |
| 1089 | goto err_workqueue; |
| 1090 | |
| 1091 | /* |
| 1092 | * On some machines, a software-initiated SMI causes corruption unless |
| 1093 | * the SMI runs on CPU 0. An SMI can be initiated by any AML, but |
| 1094 | * typically it's done in GPE-related methods that are run via |
| 1095 | * workqueues, so we can avoid the known corruption cases by always |
| 1096 | * queueing on CPU 0. |
| 1097 | */ |
| 1098 | ret = queue_work_on(0, queue, &dpc->work); |
| 1099 | if (!ret) { |
| 1100 | printk(KERN_ERR PREFIX |
| 1101 | "Call to queue_work() failed.\n"); |
| 1102 | status = AE_ERROR; |
| 1103 | } |
| 1104 | err_workqueue: |
| 1105 | if (ACPI_FAILURE(status)) |
| 1106 | kfree(dpc); |
| 1107 | out_thread: |
| 1108 | return status; |
| 1109 | } |
| 1110 | EXPORT_SYMBOL(acpi_os_execute); |
| 1111 | |
| 1112 | void acpi_os_wait_events_complete(void) |
| 1113 | { |
| 1114 | /* |
| 1115 | * Make sure the GPE handler or the fixed event handler is not used |
| 1116 | * on another CPU after removal. |
| 1117 | */ |
| 1118 | if (acpi_sci_irq_valid()) |
| 1119 | synchronize_hardirq(acpi_sci_irq); |
| 1120 | flush_workqueue(kacpid_wq); |
| 1121 | flush_workqueue(kacpi_notify_wq); |
| 1122 | } |
| 1123 | |
| 1124 | struct acpi_hp_work { |
| 1125 | struct work_struct work; |
| 1126 | struct acpi_device *adev; |
| 1127 | u32 src; |
| 1128 | }; |
| 1129 | |
| 1130 | static void acpi_hotplug_work_fn(struct work_struct *work) |
| 1131 | { |
| 1132 | struct acpi_hp_work *hpw = container_of(work, struct acpi_hp_work, work); |
| 1133 | |
| 1134 | acpi_os_wait_events_complete(); |
| 1135 | acpi_device_hotplug(hpw->adev, hpw->src); |
| 1136 | kfree(hpw); |
| 1137 | } |
| 1138 | |
| 1139 | acpi_status acpi_hotplug_schedule(struct acpi_device *adev, u32 src) |
| 1140 | { |
| 1141 | struct acpi_hp_work *hpw; |
| 1142 | |
| 1143 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
| 1144 | "Scheduling hotplug event (%p, %u) for deferred execution.\n", |
| 1145 | adev, src)); |
| 1146 | |
| 1147 | hpw = kmalloc(sizeof(*hpw), GFP_KERNEL); |
| 1148 | if (!hpw) |
| 1149 | return AE_NO_MEMORY; |
| 1150 | |
| 1151 | INIT_WORK(&hpw->work, acpi_hotplug_work_fn); |
| 1152 | hpw->adev = adev; |
| 1153 | hpw->src = src; |
| 1154 | /* |
| 1155 | * We can't run hotplug code in kacpid_wq/kacpid_notify_wq etc., because |
| 1156 | * the hotplug code may call driver .remove() functions, which may |
| 1157 | * invoke flush_scheduled_work()/acpi_os_wait_events_complete() to flush |
| 1158 | * these workqueues. |
| 1159 | */ |
| 1160 | if (!queue_work(kacpi_hotplug_wq, &hpw->work)) { |
| 1161 | kfree(hpw); |
| 1162 | return AE_ERROR; |
| 1163 | } |
| 1164 | return AE_OK; |
| 1165 | } |
| 1166 | |
| 1167 | bool acpi_queue_hotplug_work(struct work_struct *work) |
| 1168 | { |
| 1169 | return queue_work(kacpi_hotplug_wq, work); |
| 1170 | } |
| 1171 | |
| 1172 | acpi_status |
| 1173 | acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle) |
| 1174 | { |
| 1175 | struct semaphore *sem = NULL; |
| 1176 | |
| 1177 | sem = acpi_os_allocate_zeroed(sizeof(struct semaphore)); |
| 1178 | if (!sem) |
| 1179 | return AE_NO_MEMORY; |
| 1180 | |
| 1181 | sema_init(sem, initial_units); |
| 1182 | |
| 1183 | *handle = (acpi_handle *) sem; |
| 1184 | |
| 1185 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n", |
| 1186 | *handle, initial_units)); |
| 1187 | |
| 1188 | return AE_OK; |
| 1189 | } |
| 1190 | |
| 1191 | /* |
| 1192 | * TODO: A better way to delete semaphores? Linux doesn't have a |
| 1193 | * 'delete_semaphore()' function -- may result in an invalid |
| 1194 | * pointer dereference for non-synchronized consumers. Should |
| 1195 | * we at least check for blocked threads and signal/cancel them? |
| 1196 | */ |
| 1197 | |
| 1198 | acpi_status acpi_os_delete_semaphore(acpi_handle handle) |
| 1199 | { |
| 1200 | struct semaphore *sem = (struct semaphore *)handle; |
| 1201 | |
| 1202 | if (!sem) |
| 1203 | return AE_BAD_PARAMETER; |
| 1204 | |
| 1205 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle)); |
| 1206 | |
| 1207 | BUG_ON(!list_empty(&sem->wait_list)); |
| 1208 | kfree(sem); |
| 1209 | sem = NULL; |
| 1210 | |
| 1211 | return AE_OK; |
| 1212 | } |
| 1213 | |
| 1214 | /* |
| 1215 | * TODO: Support for units > 1? |
| 1216 | */ |
| 1217 | acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout) |
| 1218 | { |
| 1219 | acpi_status status = AE_OK; |
| 1220 | struct semaphore *sem = (struct semaphore *)handle; |
| 1221 | long jiffies; |
| 1222 | int ret = 0; |
| 1223 | |
| 1224 | if (!acpi_os_initialized) |
| 1225 | return AE_OK; |
| 1226 | |
| 1227 | if (!sem || (units < 1)) |
| 1228 | return AE_BAD_PARAMETER; |
| 1229 | |
| 1230 | if (units > 1) |
| 1231 | return AE_SUPPORT; |
| 1232 | |
| 1233 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n", |
| 1234 | handle, units, timeout)); |
| 1235 | |
| 1236 | if (timeout == ACPI_WAIT_FOREVER) |
| 1237 | jiffies = MAX_SCHEDULE_TIMEOUT; |
| 1238 | else |
| 1239 | jiffies = msecs_to_jiffies(timeout); |
| 1240 | |
| 1241 | ret = down_timeout(sem, jiffies); |
| 1242 | if (ret) |
| 1243 | status = AE_TIME; |
| 1244 | |
| 1245 | if (ACPI_FAILURE(status)) { |
| 1246 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, |
| 1247 | "Failed to acquire semaphore[%p|%d|%d], %s", |
| 1248 | handle, units, timeout, |
| 1249 | acpi_format_exception(status))); |
| 1250 | } else { |
| 1251 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, |
| 1252 | "Acquired semaphore[%p|%d|%d]", handle, |
| 1253 | units, timeout)); |
| 1254 | } |
| 1255 | |
| 1256 | return status; |
| 1257 | } |
| 1258 | |
| 1259 | /* |
| 1260 | * TODO: Support for units > 1? |
| 1261 | */ |
| 1262 | acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units) |
| 1263 | { |
| 1264 | struct semaphore *sem = (struct semaphore *)handle; |
| 1265 | |
| 1266 | if (!acpi_os_initialized) |
| 1267 | return AE_OK; |
| 1268 | |
| 1269 | if (!sem || (units < 1)) |
| 1270 | return AE_BAD_PARAMETER; |
| 1271 | |
| 1272 | if (units > 1) |
| 1273 | return AE_SUPPORT; |
| 1274 | |
| 1275 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle, |
| 1276 | units)); |
| 1277 | |
| 1278 | up(sem); |
| 1279 | |
| 1280 | return AE_OK; |
| 1281 | } |
| 1282 | |
| 1283 | acpi_status acpi_os_get_line(char *buffer, u32 buffer_length, u32 *bytes_read) |
| 1284 | { |
| 1285 | #ifdef ENABLE_DEBUGGER |
| 1286 | if (acpi_in_debugger) { |
| 1287 | u32 chars; |
| 1288 | |
| 1289 | kdb_read(buffer, buffer_length); |
| 1290 | |
| 1291 | /* remove the CR kdb includes */ |
| 1292 | chars = strlen(buffer) - 1; |
| 1293 | buffer[chars] = '\0'; |
| 1294 | } |
| 1295 | #else |
| 1296 | int ret; |
| 1297 | |
| 1298 | ret = acpi_debugger_read_cmd(buffer, buffer_length); |
| 1299 | if (ret < 0) |
| 1300 | return AE_ERROR; |
| 1301 | if (bytes_read) |
| 1302 | *bytes_read = ret; |
| 1303 | #endif |
| 1304 | |
| 1305 | return AE_OK; |
| 1306 | } |
| 1307 | EXPORT_SYMBOL(acpi_os_get_line); |
| 1308 | |
| 1309 | acpi_status acpi_os_wait_command_ready(void) |
| 1310 | { |
| 1311 | int ret; |
| 1312 | |
| 1313 | ret = acpi_debugger_wait_command_ready(); |
| 1314 | if (ret < 0) |
| 1315 | return AE_ERROR; |
| 1316 | return AE_OK; |
| 1317 | } |
| 1318 | |
| 1319 | acpi_status acpi_os_notify_command_complete(void) |
| 1320 | { |
| 1321 | int ret; |
| 1322 | |
| 1323 | ret = acpi_debugger_notify_command_complete(); |
| 1324 | if (ret < 0) |
| 1325 | return AE_ERROR; |
| 1326 | return AE_OK; |
| 1327 | } |
| 1328 | |
| 1329 | acpi_status acpi_os_signal(u32 function, void *info) |
| 1330 | { |
| 1331 | switch (function) { |
| 1332 | case ACPI_SIGNAL_FATAL: |
| 1333 | printk(KERN_ERR PREFIX "Fatal opcode executed\n"); |
| 1334 | break; |
| 1335 | case ACPI_SIGNAL_BREAKPOINT: |
| 1336 | /* |
| 1337 | * AML Breakpoint |
| 1338 | * ACPI spec. says to treat it as a NOP unless |
| 1339 | * you are debugging. So if/when we integrate |
| 1340 | * AML debugger into the kernel debugger its |
| 1341 | * hook will go here. But until then it is |
| 1342 | * not useful to print anything on breakpoints. |
| 1343 | */ |
| 1344 | break; |
| 1345 | default: |
| 1346 | break; |
| 1347 | } |
| 1348 | |
| 1349 | return AE_OK; |
| 1350 | } |
| 1351 | |
| 1352 | static int __init acpi_os_name_setup(char *str) |
| 1353 | { |
| 1354 | char *p = acpi_os_name; |
| 1355 | int count = ACPI_MAX_OVERRIDE_LEN - 1; |
| 1356 | |
| 1357 | if (!str || !*str) |
| 1358 | return 0; |
| 1359 | |
| 1360 | for (; count-- && *str; str++) { |
| 1361 | if (isalnum(*str) || *str == ' ' || *str == ':') |
| 1362 | *p++ = *str; |
| 1363 | else if (*str == '\'' || *str == '"') |
| 1364 | continue; |
| 1365 | else |
| 1366 | break; |
| 1367 | } |
| 1368 | *p = 0; |
| 1369 | |
| 1370 | return 1; |
| 1371 | |
| 1372 | } |
| 1373 | |
| 1374 | __setup("acpi_os_name=", acpi_os_name_setup); |
| 1375 | |
| 1376 | /* |
| 1377 | * Disable the auto-serialization of named objects creation methods. |
| 1378 | * |
| 1379 | * This feature is enabled by default. It marks the AML control methods |
| 1380 | * that contain the opcodes to create named objects as "Serialized". |
| 1381 | */ |
| 1382 | static int __init acpi_no_auto_serialize_setup(char *str) |
| 1383 | { |
| 1384 | acpi_gbl_auto_serialize_methods = FALSE; |
| 1385 | pr_info("ACPI: auto-serialization disabled\n"); |
| 1386 | |
| 1387 | return 1; |
| 1388 | } |
| 1389 | |
| 1390 | __setup("acpi_no_auto_serialize", acpi_no_auto_serialize_setup); |
| 1391 | |
| 1392 | /* Check of resource interference between native drivers and ACPI |
| 1393 | * OperationRegions (SystemIO and System Memory only). |
| 1394 | * IO ports and memory declared in ACPI might be used by the ACPI subsystem |
| 1395 | * in arbitrary AML code and can interfere with legacy drivers. |
| 1396 | * acpi_enforce_resources= can be set to: |
| 1397 | * |
| 1398 | * - strict (default) (2) |
| 1399 | * -> further driver trying to access the resources will not load |
| 1400 | * - lax (1) |
| 1401 | * -> further driver trying to access the resources will load, but you |
| 1402 | * get a system message that something might go wrong... |
| 1403 | * |
| 1404 | * - no (0) |
| 1405 | * -> ACPI Operation Region resources will not be registered |
| 1406 | * |
| 1407 | */ |
| 1408 | #define ENFORCE_RESOURCES_STRICT 2 |
| 1409 | #define ENFORCE_RESOURCES_LAX 1 |
| 1410 | #define ENFORCE_RESOURCES_NO 0 |
| 1411 | |
| 1412 | static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; |
| 1413 | |
| 1414 | static int __init acpi_enforce_resources_setup(char *str) |
| 1415 | { |
| 1416 | if (str == NULL || *str == '\0') |
| 1417 | return 0; |
| 1418 | |
| 1419 | if (!strcmp("strict", str)) |
| 1420 | acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; |
| 1421 | else if (!strcmp("lax", str)) |
| 1422 | acpi_enforce_resources = ENFORCE_RESOURCES_LAX; |
| 1423 | else if (!strcmp("no", str)) |
| 1424 | acpi_enforce_resources = ENFORCE_RESOURCES_NO; |
| 1425 | |
| 1426 | return 1; |
| 1427 | } |
| 1428 | |
| 1429 | __setup("acpi_enforce_resources=", acpi_enforce_resources_setup); |
| 1430 | |
| 1431 | /* Check for resource conflicts between ACPI OperationRegions and native |
| 1432 | * drivers */ |
| 1433 | int acpi_check_resource_conflict(const struct resource *res) |
| 1434 | { |
| 1435 | acpi_adr_space_type space_id; |
| 1436 | acpi_size length; |
| 1437 | u8 warn = 0; |
| 1438 | int clash = 0; |
| 1439 | |
| 1440 | if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) |
| 1441 | return 0; |
| 1442 | if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM)) |
| 1443 | return 0; |
| 1444 | |
| 1445 | if (res->flags & IORESOURCE_IO) |
| 1446 | space_id = ACPI_ADR_SPACE_SYSTEM_IO; |
| 1447 | else |
| 1448 | space_id = ACPI_ADR_SPACE_SYSTEM_MEMORY; |
| 1449 | |
| 1450 | length = resource_size(res); |
| 1451 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) |
| 1452 | warn = 1; |
| 1453 | clash = acpi_check_address_range(space_id, res->start, length, warn); |
| 1454 | |
| 1455 | if (clash) { |
| 1456 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) { |
| 1457 | if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX) |
| 1458 | printk(KERN_NOTICE "ACPI: This conflict may" |
| 1459 | " cause random problems and system" |
| 1460 | " instability\n"); |
| 1461 | printk(KERN_INFO "ACPI: If an ACPI driver is available" |
| 1462 | " for this device, you should use it instead of" |
| 1463 | " the native driver\n"); |
| 1464 | } |
| 1465 | if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT) |
| 1466 | return -EBUSY; |
| 1467 | } |
| 1468 | return 0; |
| 1469 | } |
| 1470 | EXPORT_SYMBOL(acpi_check_resource_conflict); |
| 1471 | |
| 1472 | int acpi_check_region(resource_size_t start, resource_size_t n, |
| 1473 | const char *name) |
| 1474 | { |
| 1475 | struct resource res = { |
| 1476 | .start = start, |
| 1477 | .end = start + n - 1, |
| 1478 | .name = name, |
| 1479 | .flags = IORESOURCE_IO, |
| 1480 | }; |
| 1481 | |
| 1482 | return acpi_check_resource_conflict(&res); |
| 1483 | } |
| 1484 | EXPORT_SYMBOL(acpi_check_region); |
| 1485 | |
| 1486 | /* |
| 1487 | * Let drivers know whether the resource checks are effective |
| 1488 | */ |
| 1489 | int acpi_resources_are_enforced(void) |
| 1490 | { |
| 1491 | return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT; |
| 1492 | } |
| 1493 | EXPORT_SYMBOL(acpi_resources_are_enforced); |
| 1494 | |
| 1495 | /* |
| 1496 | * Deallocate the memory for a spinlock. |
| 1497 | */ |
| 1498 | void acpi_os_delete_lock(acpi_spinlock handle) |
| 1499 | { |
| 1500 | ACPI_FREE(handle); |
| 1501 | } |
| 1502 | |
| 1503 | /* |
| 1504 | * Acquire a spinlock. |
| 1505 | * |
| 1506 | * handle is a pointer to the spinlock_t. |
| 1507 | */ |
| 1508 | |
| 1509 | acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp) |
| 1510 | { |
| 1511 | acpi_cpu_flags flags; |
| 1512 | spin_lock_irqsave(lockp, flags); |
| 1513 | return flags; |
| 1514 | } |
| 1515 | |
| 1516 | /* |
| 1517 | * Release a spinlock. See above. |
| 1518 | */ |
| 1519 | |
| 1520 | void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags) |
| 1521 | { |
| 1522 | spin_unlock_irqrestore(lockp, flags); |
| 1523 | } |
| 1524 | |
| 1525 | #ifndef ACPI_USE_LOCAL_CACHE |
| 1526 | |
| 1527 | /******************************************************************************* |
| 1528 | * |
| 1529 | * FUNCTION: acpi_os_create_cache |
| 1530 | * |
| 1531 | * PARAMETERS: name - Ascii name for the cache |
| 1532 | * size - Size of each cached object |
| 1533 | * depth - Maximum depth of the cache (in objects) <ignored> |
| 1534 | * cache - Where the new cache object is returned |
| 1535 | * |
| 1536 | * RETURN: status |
| 1537 | * |
| 1538 | * DESCRIPTION: Create a cache object |
| 1539 | * |
| 1540 | ******************************************************************************/ |
| 1541 | |
| 1542 | acpi_status |
| 1543 | acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache) |
| 1544 | { |
| 1545 | *cache = kmem_cache_create(name, size, 0, 0, NULL); |
| 1546 | if (*cache == NULL) |
| 1547 | return AE_ERROR; |
| 1548 | else |
| 1549 | return AE_OK; |
| 1550 | } |
| 1551 | |
| 1552 | /******************************************************************************* |
| 1553 | * |
| 1554 | * FUNCTION: acpi_os_purge_cache |
| 1555 | * |
| 1556 | * PARAMETERS: Cache - Handle to cache object |
| 1557 | * |
| 1558 | * RETURN: Status |
| 1559 | * |
| 1560 | * DESCRIPTION: Free all objects within the requested cache. |
| 1561 | * |
| 1562 | ******************************************************************************/ |
| 1563 | |
| 1564 | acpi_status acpi_os_purge_cache(acpi_cache_t * cache) |
| 1565 | { |
| 1566 | kmem_cache_shrink(cache); |
| 1567 | return (AE_OK); |
| 1568 | } |
| 1569 | |
| 1570 | /******************************************************************************* |
| 1571 | * |
| 1572 | * FUNCTION: acpi_os_delete_cache |
| 1573 | * |
| 1574 | * PARAMETERS: Cache - Handle to cache object |
| 1575 | * |
| 1576 | * RETURN: Status |
| 1577 | * |
| 1578 | * DESCRIPTION: Free all objects within the requested cache and delete the |
| 1579 | * cache object. |
| 1580 | * |
| 1581 | ******************************************************************************/ |
| 1582 | |
| 1583 | acpi_status acpi_os_delete_cache(acpi_cache_t * cache) |
| 1584 | { |
| 1585 | kmem_cache_destroy(cache); |
| 1586 | return (AE_OK); |
| 1587 | } |
| 1588 | |
| 1589 | /******************************************************************************* |
| 1590 | * |
| 1591 | * FUNCTION: acpi_os_release_object |
| 1592 | * |
| 1593 | * PARAMETERS: Cache - Handle to cache object |
| 1594 | * Object - The object to be released |
| 1595 | * |
| 1596 | * RETURN: None |
| 1597 | * |
| 1598 | * DESCRIPTION: Release an object to the specified cache. If cache is full, |
| 1599 | * the object is deleted. |
| 1600 | * |
| 1601 | ******************************************************************************/ |
| 1602 | |
| 1603 | acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object) |
| 1604 | { |
| 1605 | kmem_cache_free(cache, object); |
| 1606 | return (AE_OK); |
| 1607 | } |
| 1608 | #endif |
| 1609 | |
| 1610 | static int __init acpi_no_static_ssdt_setup(char *s) |
| 1611 | { |
| 1612 | acpi_gbl_disable_ssdt_table_install = TRUE; |
| 1613 | pr_info("ACPI: static SSDT installation disabled\n"); |
| 1614 | |
| 1615 | return 0; |
| 1616 | } |
| 1617 | |
| 1618 | early_param("acpi_no_static_ssdt", acpi_no_static_ssdt_setup); |
| 1619 | |
| 1620 | static int __init acpi_disable_return_repair(char *s) |
| 1621 | { |
| 1622 | printk(KERN_NOTICE PREFIX |
| 1623 | "ACPI: Predefined validation mechanism disabled\n"); |
| 1624 | acpi_gbl_disable_auto_repair = TRUE; |
| 1625 | |
| 1626 | return 1; |
| 1627 | } |
| 1628 | |
| 1629 | __setup("acpica_no_return_repair", acpi_disable_return_repair); |
| 1630 | |
| 1631 | acpi_status __init acpi_os_initialize(void) |
| 1632 | { |
| 1633 | acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block); |
| 1634 | acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block); |
| 1635 | acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block); |
| 1636 | acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block); |
| 1637 | if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) { |
| 1638 | /* |
| 1639 | * Use acpi_os_map_generic_address to pre-map the reset |
| 1640 | * register if it's in system memory. |
| 1641 | */ |
| 1642 | int rv; |
| 1643 | |
| 1644 | rv = acpi_os_map_generic_address(&acpi_gbl_FADT.reset_register); |
| 1645 | pr_debug(PREFIX "%s: map reset_reg status %d\n", __func__, rv); |
| 1646 | } |
| 1647 | acpi_os_initialized = true; |
| 1648 | |
| 1649 | return AE_OK; |
| 1650 | } |
| 1651 | |
| 1652 | acpi_status __init acpi_os_initialize1(void) |
| 1653 | { |
| 1654 | kacpid_wq = alloc_workqueue("kacpid", 0, 1); |
| 1655 | kacpi_notify_wq = alloc_workqueue("kacpi_notify", 0, 1); |
| 1656 | kacpi_hotplug_wq = alloc_ordered_workqueue("kacpi_hotplug", 0); |
| 1657 | BUG_ON(!kacpid_wq); |
| 1658 | BUG_ON(!kacpi_notify_wq); |
| 1659 | BUG_ON(!kacpi_hotplug_wq); |
| 1660 | acpi_osi_init(); |
| 1661 | return AE_OK; |
| 1662 | } |
| 1663 | |
| 1664 | acpi_status acpi_os_terminate(void) |
| 1665 | { |
| 1666 | if (acpi_irq_handler) { |
| 1667 | acpi_os_remove_interrupt_handler(acpi_gbl_FADT.sci_interrupt, |
| 1668 | acpi_irq_handler); |
| 1669 | } |
| 1670 | |
| 1671 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe1_block); |
| 1672 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block); |
| 1673 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block); |
| 1674 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block); |
| 1675 | if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) |
| 1676 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.reset_register); |
| 1677 | |
| 1678 | destroy_workqueue(kacpid_wq); |
| 1679 | destroy_workqueue(kacpi_notify_wq); |
| 1680 | destroy_workqueue(kacpi_hotplug_wq); |
| 1681 | |
| 1682 | return AE_OK; |
| 1683 | } |
| 1684 | |
| 1685 | acpi_status acpi_os_prepare_sleep(u8 sleep_state, u32 pm1a_control, |
| 1686 | u32 pm1b_control) |
| 1687 | { |
| 1688 | int rc = 0; |
| 1689 | if (__acpi_os_prepare_sleep) |
| 1690 | rc = __acpi_os_prepare_sleep(sleep_state, |
| 1691 | pm1a_control, pm1b_control); |
| 1692 | if (rc < 0) |
| 1693 | return AE_ERROR; |
| 1694 | else if (rc > 0) |
| 1695 | return AE_CTRL_SKIP; |
| 1696 | |
| 1697 | return AE_OK; |
| 1698 | } |
| 1699 | |
| 1700 | void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state, |
| 1701 | u32 pm1a_ctrl, u32 pm1b_ctrl)) |
| 1702 | { |
| 1703 | __acpi_os_prepare_sleep = func; |
| 1704 | } |
| 1705 | |
| 1706 | acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state, u32 val_a, |
| 1707 | u32 val_b) |
| 1708 | { |
| 1709 | int rc = 0; |
| 1710 | if (__acpi_os_prepare_extended_sleep) |
| 1711 | rc = __acpi_os_prepare_extended_sleep(sleep_state, |
| 1712 | val_a, val_b); |
| 1713 | if (rc < 0) |
| 1714 | return AE_ERROR; |
| 1715 | else if (rc > 0) |
| 1716 | return AE_CTRL_SKIP; |
| 1717 | |
| 1718 | return AE_OK; |
| 1719 | } |
| 1720 | |
| 1721 | void acpi_os_set_prepare_extended_sleep(int (*func)(u8 sleep_state, |
| 1722 | u32 val_a, u32 val_b)) |
| 1723 | { |
| 1724 | __acpi_os_prepare_extended_sleep = func; |
| 1725 | } |