Commit | Line | Data |
---|---|---|
1da177e4 LT |
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> | |
f1241c87 MW |
7 | * Copyright (c) 2008 Intel Corporation |
8 | * Author: Matthew Wilcox <willy@linux.intel.com> | |
1da177e4 LT |
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 | ||
1da177e4 LT |
30 | #include <linux/module.h> |
31 | #include <linux/kernel.h> | |
32 | #include <linux/slab.h> | |
33 | #include <linux/mm.h> | |
ba242d5b | 34 | #include <linux/highmem.h> |
1da177e4 | 35 | #include <linux/pci.h> |
1da177e4 LT |
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> | |
ad71860a | 41 | #include <linux/acpi.h> |
2d6d9fd3 | 42 | #include <linux/acpi_io.h> |
1da177e4 | 43 | #include <linux/efi.h> |
df92e695 TR |
44 | #include <linux/ioport.h> |
45 | #include <linux/list.h> | |
f1241c87 MW |
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> | |
1da177e4 | 55 | |
1da177e4 | 56 | #define _COMPONENT ACPI_OS_SERVICES |
f52fd66d | 57 | ACPI_MODULE_NAME("osl"); |
1da177e4 | 58 | #define PREFIX "ACPI: " |
4be44fcd LB |
59 | struct acpi_os_dpc { |
60 | acpi_osd_exec_callback function; | |
61 | void *context; | |
65f27f38 | 62 | struct work_struct work; |
9ac61856 | 63 | int wait; |
1da177e4 LT |
64 | }; |
65 | ||
66 | #ifdef CONFIG_ACPI_CUSTOM_DSDT | |
67 | #include CONFIG_ACPI_CUSTOM_DSDT_FILE | |
68 | #endif | |
69 | ||
70 | #ifdef ENABLE_DEBUGGER | |
71 | #include <linux/kdb.h> | |
72 | ||
73 | /* stuff for debugger support */ | |
74 | int acpi_in_debugger; | |
75 | EXPORT_SYMBOL(acpi_in_debugger); | |
76 | ||
77 | extern char line_buf[80]; | |
4be44fcd | 78 | #endif /*ENABLE_DEBUGGER */ |
1da177e4 | 79 | |
1da177e4 LT |
80 | static acpi_osd_handler acpi_irq_handler; |
81 | static void *acpi_irq_context; | |
82 | static struct workqueue_struct *kacpid_wq; | |
88db5e14 | 83 | static struct workqueue_struct *kacpi_notify_wq; |
6af8bef1 PB |
84 | struct workqueue_struct *kacpi_hotplug_wq; |
85 | EXPORT_SYMBOL(kacpi_hotplug_wq); | |
1da177e4 | 86 | |
620242ae MS |
87 | /* |
88 | * This list of permanent mappings is for memory that may be accessed from | |
89 | * interrupt context, where we can't do the ioremap(). | |
90 | */ | |
91 | struct acpi_ioremap { | |
92 | struct list_head list; | |
93 | void __iomem *virt; | |
94 | acpi_physical_address phys; | |
95 | acpi_size size; | |
b7c1fadd | 96 | unsigned long refcount; |
620242ae MS |
97 | }; |
98 | ||
99 | static LIST_HEAD(acpi_ioremaps); | |
7bbb8903 | 100 | static DEFINE_MUTEX(acpi_ioremap_lock); |
620242ae | 101 | |
b0ed7a91 | 102 | static void __init acpi_osi_setup_late(void); |
ae00d812 | 103 | |
d4b7dc49 | 104 | /* |
a6e0887f | 105 | * The story of _OSI(Linux) |
d4b7dc49 | 106 | * |
a6e0887f LB |
107 | * From pre-history through Linux-2.6.22, |
108 | * Linux responded TRUE upon a BIOS OSI(Linux) query. | |
d4b7dc49 | 109 | * |
a6e0887f LB |
110 | * Unfortunately, reference BIOS writers got wind of this |
111 | * and put OSI(Linux) in their example code, quickly exposing | |
112 | * this string as ill-conceived and opening the door to | |
113 | * an un-bounded number of BIOS incompatibilities. | |
d4b7dc49 | 114 | * |
a6e0887f LB |
115 | * For example, OSI(Linux) was used on resume to re-POST a |
116 | * video card on one system, because Linux at that time | |
117 | * could not do a speedy restore in its native driver. | |
118 | * But then upon gaining quick native restore capability, | |
119 | * Linux has no way to tell the BIOS to skip the time-consuming | |
120 | * POST -- putting Linux at a permanent performance disadvantage. | |
121 | * On another system, the BIOS writer used OSI(Linux) | |
122 | * to infer native OS support for IPMI! On other systems, | |
123 | * OSI(Linux) simply got in the way of Linux claiming to | |
124 | * be compatible with other operating systems, exposing | |
125 | * BIOS issues such as skipped device initialization. | |
d4b7dc49 | 126 | * |
a6e0887f LB |
127 | * So "Linux" turned out to be a really poor chose of |
128 | * OSI string, and from Linux-2.6.23 onward we respond FALSE. | |
d4b7dc49 LB |
129 | * |
130 | * BIOS writers should NOT query _OSI(Linux) on future systems. | |
a6e0887f LB |
131 | * Linux will complain on the console when it sees it, and return FALSE. |
132 | * To get Linux to return TRUE for your system will require | |
133 | * a kernel source update to add a DMI entry, | |
134 | * or boot with "acpi_osi=Linux" | |
d4b7dc49 | 135 | */ |
d4b7dc49 | 136 | |
1d15d84e | 137 | static struct osi_linux { |
d4b7dc49 LB |
138 | unsigned int enable:1; |
139 | unsigned int dmi:1; | |
140 | unsigned int cmdline:1; | |
d90aa92c | 141 | } osi_linux = {0, 0, 0}; |
f507654d | 142 | |
b0ed7a91 LM |
143 | static u32 acpi_osi_handler(acpi_string interface, u32 supported) |
144 | { | |
145 | if (!strcmp("Linux", interface)) { | |
146 | ||
8997621b | 147 | printk_once(KERN_NOTICE FW_BUG PREFIX |
b0ed7a91 LM |
148 | "BIOS _OSI(Linux) query %s%s\n", |
149 | osi_linux.enable ? "honored" : "ignored", | |
150 | osi_linux.cmdline ? " via cmdline" : | |
151 | osi_linux.dmi ? " via DMI" : ""); | |
152 | } | |
153 | ||
154 | return supported; | |
155 | } | |
156 | ||
bc9ffce2 | 157 | static void __init acpi_request_region (struct acpi_generic_address *gas, |
9a47cdb1 BH |
158 | unsigned int length, char *desc) |
159 | { | |
bc9ffce2 MS |
160 | u64 addr; |
161 | ||
162 | /* Handle possible alignment issues */ | |
163 | memcpy(&addr, &gas->address, sizeof(addr)); | |
164 | if (!addr || !length) | |
9a47cdb1 BH |
165 | return; |
166 | ||
cfa806f0 | 167 | /* Resources are never freed */ |
bc9ffce2 MS |
168 | if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_IO) |
169 | request_region(addr, length, desc); | |
170 | else if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) | |
171 | request_mem_region(addr, length, desc); | |
9a47cdb1 BH |
172 | } |
173 | ||
174 | static int __init acpi_reserve_resources(void) | |
175 | { | |
eee3c859 | 176 | acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
177 | "ACPI PM1a_EVT_BLK"); |
178 | ||
eee3c859 | 179 | acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
180 | "ACPI PM1b_EVT_BLK"); |
181 | ||
eee3c859 | 182 | acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
183 | "ACPI PM1a_CNT_BLK"); |
184 | ||
eee3c859 | 185 | acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
186 | "ACPI PM1b_CNT_BLK"); |
187 | ||
eee3c859 LB |
188 | if (acpi_gbl_FADT.pm_timer_length == 4) |
189 | acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR"); | |
9a47cdb1 | 190 | |
eee3c859 | 191 | acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length, |
9a47cdb1 BH |
192 | "ACPI PM2_CNT_BLK"); |
193 | ||
194 | /* Length of GPE blocks must be a non-negative multiple of 2 */ | |
195 | ||
eee3c859 LB |
196 | if (!(acpi_gbl_FADT.gpe0_block_length & 0x1)) |
197 | acpi_request_region(&acpi_gbl_FADT.xgpe0_block, | |
198 | acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK"); | |
9a47cdb1 | 199 | |
eee3c859 LB |
200 | if (!(acpi_gbl_FADT.gpe1_block_length & 0x1)) |
201 | acpi_request_region(&acpi_gbl_FADT.xgpe1_block, | |
202 | acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK"); | |
9a47cdb1 BH |
203 | |
204 | return 0; | |
205 | } | |
206 | device_initcall(acpi_reserve_resources); | |
207 | ||
4be44fcd | 208 | void acpi_os_printf(const char *fmt, ...) |
1da177e4 LT |
209 | { |
210 | va_list args; | |
211 | va_start(args, fmt); | |
212 | acpi_os_vprintf(fmt, args); | |
213 | va_end(args); | |
214 | } | |
4be44fcd | 215 | |
4be44fcd | 216 | void acpi_os_vprintf(const char *fmt, va_list args) |
1da177e4 LT |
217 | { |
218 | static char buffer[512]; | |
4be44fcd | 219 | |
1da177e4 LT |
220 | vsprintf(buffer, fmt, args); |
221 | ||
222 | #ifdef ENABLE_DEBUGGER | |
223 | if (acpi_in_debugger) { | |
224 | kdb_printf("%s", buffer); | |
225 | } else { | |
4d939155 | 226 | printk(KERN_CONT "%s", buffer); |
1da177e4 LT |
227 | } |
228 | #else | |
4d939155 | 229 | printk(KERN_CONT "%s", buffer); |
1da177e4 LT |
230 | #endif |
231 | } | |
232 | ||
4996c023 TI |
233 | #ifdef CONFIG_KEXEC |
234 | static unsigned long acpi_rsdp; | |
235 | static int __init setup_acpi_rsdp(char *arg) | |
236 | { | |
237 | acpi_rsdp = simple_strtoul(arg, NULL, 16); | |
238 | return 0; | |
239 | } | |
240 | early_param("acpi_rsdp", setup_acpi_rsdp); | |
241 | #endif | |
242 | ||
ad71860a | 243 | acpi_physical_address __init acpi_os_get_root_pointer(void) |
1da177e4 | 244 | { |
4996c023 TI |
245 | #ifdef CONFIG_KEXEC |
246 | if (acpi_rsdp) | |
247 | return acpi_rsdp; | |
248 | #endif | |
249 | ||
1da177e4 | 250 | if (efi_enabled) { |
b2c99e3c | 251 | if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) |
ad71860a | 252 | return efi.acpi20; |
b2c99e3c | 253 | else if (efi.acpi != EFI_INVALID_TABLE_ADDR) |
ad71860a | 254 | return efi.acpi; |
1da177e4 | 255 | else { |
4be44fcd LB |
256 | printk(KERN_ERR PREFIX |
257 | "System description tables not found\n"); | |
ad71860a | 258 | return 0; |
1da177e4 | 259 | } |
239665a3 LB |
260 | } else { |
261 | acpi_physical_address pa = 0; | |
262 | ||
263 | acpi_find_root_pointer(&pa); | |
264 | return pa; | |
265 | } | |
1da177e4 LT |
266 | } |
267 | ||
78cdb3ed | 268 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ |
4a3cba5e MS |
269 | static struct acpi_ioremap * |
270 | acpi_map_lookup(acpi_physical_address phys, acpi_size size) | |
620242ae MS |
271 | { |
272 | struct acpi_ioremap *map; | |
273 | ||
78cdb3ed | 274 | list_for_each_entry_rcu(map, &acpi_ioremaps, list) |
620242ae MS |
275 | if (map->phys <= phys && |
276 | phys + size <= map->phys + map->size) | |
4a3cba5e MS |
277 | return map; |
278 | ||
279 | return NULL; | |
280 | } | |
281 | ||
282 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ | |
283 | static void __iomem * | |
284 | acpi_map_vaddr_lookup(acpi_physical_address phys, unsigned int size) | |
285 | { | |
286 | struct acpi_ioremap *map; | |
287 | ||
288 | map = acpi_map_lookup(phys, size); | |
289 | if (map) | |
290 | return map->virt + (phys - map->phys); | |
620242ae MS |
291 | |
292 | return NULL; | |
293 | } | |
294 | ||
13606a2d RW |
295 | void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size) |
296 | { | |
297 | struct acpi_ioremap *map; | |
298 | void __iomem *virt = NULL; | |
299 | ||
300 | mutex_lock(&acpi_ioremap_lock); | |
301 | map = acpi_map_lookup(phys, size); | |
302 | if (map) { | |
303 | virt = map->virt + (phys - map->phys); | |
304 | map->refcount++; | |
305 | } | |
306 | mutex_unlock(&acpi_ioremap_lock); | |
307 | return virt; | |
308 | } | |
309 | EXPORT_SYMBOL_GPL(acpi_os_get_iomem); | |
310 | ||
78cdb3ed | 311 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ |
620242ae MS |
312 | static struct acpi_ioremap * |
313 | acpi_map_lookup_virt(void __iomem *virt, acpi_size size) | |
314 | { | |
315 | struct acpi_ioremap *map; | |
316 | ||
78cdb3ed | 317 | list_for_each_entry_rcu(map, &acpi_ioremaps, list) |
4a3cba5e MS |
318 | if (map->virt <= virt && |
319 | virt + size <= map->virt + map->size) | |
620242ae MS |
320 | return map; |
321 | ||
322 | return NULL; | |
323 | } | |
324 | ||
ba242d5b MS |
325 | #ifndef CONFIG_IA64 |
326 | #define should_use_kmap(pfn) page_is_ram(pfn) | |
327 | #else | |
328 | /* ioremap will take care of cache attributes */ | |
329 | #define should_use_kmap(pfn) 0 | |
330 | #endif | |
331 | ||
332 | static void __iomem *acpi_map(acpi_physical_address pg_off, unsigned long pg_sz) | |
333 | { | |
334 | unsigned long pfn; | |
335 | ||
336 | pfn = pg_off >> PAGE_SHIFT; | |
337 | if (should_use_kmap(pfn)) { | |
338 | if (pg_sz > PAGE_SIZE) | |
339 | return NULL; | |
340 | return (void __iomem __force *)kmap(pfn_to_page(pfn)); | |
341 | } else | |
342 | return acpi_os_ioremap(pg_off, pg_sz); | |
343 | } | |
344 | ||
345 | static void acpi_unmap(acpi_physical_address pg_off, void __iomem *vaddr) | |
346 | { | |
347 | unsigned long pfn; | |
348 | ||
349 | pfn = pg_off >> PAGE_SHIFT; | |
350 | if (page_is_ram(pfn)) | |
351 | kunmap(pfn_to_page(pfn)); | |
352 | else | |
353 | iounmap(vaddr); | |
354 | } | |
355 | ||
2fdf0741 JB |
356 | void __iomem *__init_refok |
357 | acpi_os_map_memory(acpi_physical_address phys, acpi_size size) | |
1da177e4 | 358 | { |
7ffd0443 | 359 | struct acpi_ioremap *map; |
620242ae | 360 | void __iomem *virt; |
2d6d9fd3 RW |
361 | acpi_physical_address pg_off; |
362 | acpi_size pg_sz; | |
620242ae | 363 | |
9f4fd61f BH |
364 | if (phys > ULONG_MAX) { |
365 | printk(KERN_ERR PREFIX "Cannot map memory that high\n"); | |
70c0846e | 366 | return NULL; |
1da177e4 | 367 | } |
620242ae MS |
368 | |
369 | if (!acpi_gbl_permanent_mmap) | |
ad71860a | 370 | return __acpi_map_table((unsigned long)phys, size); |
620242ae | 371 | |
7ffd0443 RW |
372 | mutex_lock(&acpi_ioremap_lock); |
373 | /* Check if there's a suitable mapping already. */ | |
374 | map = acpi_map_lookup(phys, size); | |
375 | if (map) { | |
b7c1fadd | 376 | map->refcount++; |
7ffd0443 RW |
377 | goto out; |
378 | } | |
379 | ||
620242ae | 380 | map = kzalloc(sizeof(*map), GFP_KERNEL); |
7ffd0443 RW |
381 | if (!map) { |
382 | mutex_unlock(&acpi_ioremap_lock); | |
620242ae | 383 | return NULL; |
7ffd0443 | 384 | } |
620242ae | 385 | |
4a3cba5e MS |
386 | pg_off = round_down(phys, PAGE_SIZE); |
387 | pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off; | |
ba242d5b | 388 | virt = acpi_map(pg_off, pg_sz); |
620242ae | 389 | if (!virt) { |
7ffd0443 | 390 | mutex_unlock(&acpi_ioremap_lock); |
620242ae MS |
391 | kfree(map); |
392 | return NULL; | |
393 | } | |
394 | ||
395 | INIT_LIST_HEAD(&map->list); | |
396 | map->virt = virt; | |
4a3cba5e MS |
397 | map->phys = pg_off; |
398 | map->size = pg_sz; | |
b7c1fadd | 399 | map->refcount = 1; |
620242ae | 400 | |
78cdb3ed | 401 | list_add_tail_rcu(&map->list, &acpi_ioremaps); |
620242ae | 402 | |
7ffd0443 RW |
403 | out: |
404 | mutex_unlock(&acpi_ioremap_lock); | |
4a3cba5e | 405 | return map->virt + (phys - map->phys); |
1da177e4 | 406 | } |
55a82ab3 | 407 | EXPORT_SYMBOL_GPL(acpi_os_map_memory); |
1da177e4 | 408 | |
b7c1fadd | 409 | static void acpi_os_drop_map_ref(struct acpi_ioremap *map) |
4a3cba5e | 410 | { |
b7c1fadd RW |
411 | if (!--map->refcount) |
412 | list_del_rcu(&map->list); | |
4a3cba5e | 413 | } |
4a3cba5e | 414 | |
b7c1fadd | 415 | static void acpi_os_map_cleanup(struct acpi_ioremap *map) |
7fe135dc | 416 | { |
b7c1fadd RW |
417 | if (!map->refcount) { |
418 | synchronize_rcu(); | |
ba242d5b | 419 | acpi_unmap(map->phys, map->virt); |
b7c1fadd RW |
420 | kfree(map); |
421 | } | |
4a3cba5e MS |
422 | } |
423 | ||
0d3a9cf5 | 424 | void __ref acpi_os_unmap_memory(void __iomem *virt, acpi_size size) |
1da177e4 | 425 | { |
620242ae | 426 | struct acpi_ioremap *map; |
620242ae MS |
427 | |
428 | if (!acpi_gbl_permanent_mmap) { | |
7d97277b | 429 | __acpi_unmap_table(virt, size); |
620242ae MS |
430 | return; |
431 | } | |
432 | ||
7bbb8903 | 433 | mutex_lock(&acpi_ioremap_lock); |
620242ae MS |
434 | map = acpi_map_lookup_virt(virt, size); |
435 | if (!map) { | |
7bbb8903 | 436 | mutex_unlock(&acpi_ioremap_lock); |
7fe135dc | 437 | WARN(true, PREFIX "%s: bad address %p\n", __func__, virt); |
620242ae MS |
438 | return; |
439 | } | |
b7c1fadd | 440 | acpi_os_drop_map_ref(map); |
7bbb8903 | 441 | mutex_unlock(&acpi_ioremap_lock); |
620242ae | 442 | |
b7c1fadd | 443 | acpi_os_map_cleanup(map); |
1da177e4 | 444 | } |
55a82ab3 | 445 | EXPORT_SYMBOL_GPL(acpi_os_unmap_memory); |
1da177e4 | 446 | |
0d3a9cf5 | 447 | void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size) |
7d97277b YL |
448 | { |
449 | if (!acpi_gbl_permanent_mmap) | |
450 | __acpi_unmap_table(virt, size); | |
451 | } | |
452 | ||
6f68c91c | 453 | int acpi_os_map_generic_address(struct acpi_generic_address *gas) |
29718521 | 454 | { |
bc9ffce2 | 455 | u64 addr; |
29718521 MS |
456 | void __iomem *virt; |
457 | ||
bc9ffce2 | 458 | if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) |
29718521 MS |
459 | return 0; |
460 | ||
bc9ffce2 MS |
461 | /* Handle possible alignment issues */ |
462 | memcpy(&addr, &gas->address, sizeof(addr)); | |
463 | if (!addr || !gas->bit_width) | |
29718521 MS |
464 | return -EINVAL; |
465 | ||
bc9ffce2 | 466 | virt = acpi_os_map_memory(addr, gas->bit_width / 8); |
29718521 MS |
467 | if (!virt) |
468 | return -EIO; | |
469 | ||
470 | return 0; | |
471 | } | |
6f68c91c | 472 | EXPORT_SYMBOL(acpi_os_map_generic_address); |
29718521 | 473 | |
6f68c91c | 474 | void acpi_os_unmap_generic_address(struct acpi_generic_address *gas) |
29718521 | 475 | { |
bc9ffce2 | 476 | u64 addr; |
7fe135dc | 477 | struct acpi_ioremap *map; |
29718521 | 478 | |
bc9ffce2 | 479 | if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) |
29718521 MS |
480 | return; |
481 | ||
bc9ffce2 MS |
482 | /* Handle possible alignment issues */ |
483 | memcpy(&addr, &gas->address, sizeof(addr)); | |
484 | if (!addr || !gas->bit_width) | |
29718521 MS |
485 | return; |
486 | ||
7bbb8903 | 487 | mutex_lock(&acpi_ioremap_lock); |
bc9ffce2 | 488 | map = acpi_map_lookup(addr, gas->bit_width / 8); |
7fe135dc RW |
489 | if (!map) { |
490 | mutex_unlock(&acpi_ioremap_lock); | |
491 | return; | |
492 | } | |
b7c1fadd | 493 | acpi_os_drop_map_ref(map); |
7bbb8903 | 494 | mutex_unlock(&acpi_ioremap_lock); |
29718521 | 495 | |
b7c1fadd | 496 | acpi_os_map_cleanup(map); |
29718521 | 497 | } |
6f68c91c | 498 | EXPORT_SYMBOL(acpi_os_unmap_generic_address); |
29718521 | 499 | |
1da177e4 LT |
500 | #ifdef ACPI_FUTURE_USAGE |
501 | acpi_status | |
4be44fcd | 502 | acpi_os_get_physical_address(void *virt, acpi_physical_address * phys) |
1da177e4 | 503 | { |
4be44fcd | 504 | if (!phys || !virt) |
1da177e4 LT |
505 | return AE_BAD_PARAMETER; |
506 | ||
507 | *phys = virt_to_phys(virt); | |
508 | ||
509 | return AE_OK; | |
510 | } | |
511 | #endif | |
512 | ||
513 | #define ACPI_MAX_OVERRIDE_LEN 100 | |
514 | ||
515 | static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN]; | |
516 | ||
517 | acpi_status | |
4be44fcd LB |
518 | acpi_os_predefined_override(const struct acpi_predefined_names *init_val, |
519 | acpi_string * new_val) | |
1da177e4 LT |
520 | { |
521 | if (!init_val || !new_val) | |
522 | return AE_BAD_PARAMETER; | |
523 | ||
524 | *new_val = NULL; | |
4be44fcd | 525 | if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) { |
1da177e4 | 526 | printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n", |
4be44fcd | 527 | acpi_os_name); |
1da177e4 LT |
528 | *new_val = acpi_os_name; |
529 | } | |
530 | ||
531 | return AE_OK; | |
532 | } | |
533 | ||
534 | acpi_status | |
4be44fcd LB |
535 | acpi_os_table_override(struct acpi_table_header * existing_table, |
536 | struct acpi_table_header ** new_table) | |
1da177e4 LT |
537 | { |
538 | if (!existing_table || !new_table) | |
539 | return AE_BAD_PARAMETER; | |
540 | ||
71fc47a9 MG |
541 | *new_table = NULL; |
542 | ||
1da177e4 LT |
543 | #ifdef CONFIG_ACPI_CUSTOM_DSDT |
544 | if (strncmp(existing_table->signature, "DSDT", 4) == 0) | |
4be44fcd | 545 | *new_table = (struct acpi_table_header *)AmlCode; |
1da177e4 | 546 | #endif |
6ed31e92 ÉP |
547 | if (*new_table != NULL) { |
548 | printk(KERN_WARNING PREFIX "Override [%4.4s-%8.8s], " | |
549 | "this is unsafe: tainting kernel\n", | |
550 | existing_table->signature, | |
551 | existing_table->oem_table_id); | |
552 | add_taint(TAINT_OVERRIDDEN_ACPI_TABLE); | |
553 | } | |
1da177e4 LT |
554 | return AE_OK; |
555 | } | |
556 | ||
7d12e780 | 557 | static irqreturn_t acpi_irq(int irq, void *dev_id) |
1da177e4 | 558 | { |
5229e87d LB |
559 | u32 handled; |
560 | ||
561 | handled = (*acpi_irq_handler) (acpi_irq_context); | |
562 | ||
563 | if (handled) { | |
564 | acpi_irq_handled++; | |
565 | return IRQ_HANDLED; | |
88bea188 LB |
566 | } else { |
567 | acpi_irq_not_handled++; | |
5229e87d | 568 | return IRQ_NONE; |
88bea188 | 569 | } |
1da177e4 LT |
570 | } |
571 | ||
572 | acpi_status | |
4be44fcd LB |
573 | acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler, |
574 | void *context) | |
1da177e4 LT |
575 | { |
576 | unsigned int irq; | |
577 | ||
5229e87d LB |
578 | acpi_irq_stats_init(); |
579 | ||
1da177e4 | 580 | /* |
23fe3630 RW |
581 | * ACPI interrupts different from the SCI in our copy of the FADT are |
582 | * not supported. | |
1da177e4 | 583 | */ |
23fe3630 RW |
584 | if (gsi != acpi_gbl_FADT.sci_interrupt) |
585 | return AE_BAD_PARAMETER; | |
586 | ||
587 | if (acpi_irq_handler) | |
588 | return AE_ALREADY_ACQUIRED; | |
589 | ||
1da177e4 LT |
590 | if (acpi_gsi_to_irq(gsi, &irq) < 0) { |
591 | printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n", | |
592 | gsi); | |
593 | return AE_OK; | |
594 | } | |
595 | ||
596 | acpi_irq_handler = handler; | |
597 | acpi_irq_context = context; | |
dace1453 | 598 | if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) { |
1da177e4 | 599 | printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq); |
23fe3630 | 600 | acpi_irq_handler = NULL; |
1da177e4 LT |
601 | return AE_NOT_ACQUIRED; |
602 | } | |
1da177e4 LT |
603 | |
604 | return AE_OK; | |
605 | } | |
606 | ||
4be44fcd | 607 | acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler) |
1da177e4 | 608 | { |
23fe3630 RW |
609 | if (irq != acpi_gbl_FADT.sci_interrupt) |
610 | return AE_BAD_PARAMETER; | |
611 | ||
612 | free_irq(irq, acpi_irq); | |
613 | acpi_irq_handler = NULL; | |
1da177e4 LT |
614 | |
615 | return AE_OK; | |
616 | } | |
617 | ||
618 | /* | |
619 | * Running in interpreter thread context, safe to sleep | |
620 | */ | |
621 | ||
439913ff | 622 | void acpi_os_sleep(u64 ms) |
1da177e4 | 623 | { |
01a527ec | 624 | schedule_timeout_interruptible(msecs_to_jiffies(ms)); |
1da177e4 | 625 | } |
4be44fcd | 626 | |
4be44fcd | 627 | void acpi_os_stall(u32 us) |
1da177e4 LT |
628 | { |
629 | while (us) { | |
630 | u32 delay = 1000; | |
631 | ||
632 | if (delay > us) | |
633 | delay = us; | |
634 | udelay(delay); | |
635 | touch_nmi_watchdog(); | |
636 | us -= delay; | |
637 | } | |
638 | } | |
4be44fcd | 639 | |
1da177e4 LT |
640 | /* |
641 | * Support ACPI 3.0 AML Timer operand | |
642 | * Returns 64-bit free-running, monotonically increasing timer | |
643 | * with 100ns granularity | |
644 | */ | |
4be44fcd | 645 | u64 acpi_os_get_timer(void) |
1da177e4 LT |
646 | { |
647 | static u64 t; | |
648 | ||
649 | #ifdef CONFIG_HPET | |
650 | /* TBD: use HPET if available */ | |
651 | #endif | |
652 | ||
653 | #ifdef CONFIG_X86_PM_TIMER | |
654 | /* TBD: default to PM timer if HPET was not available */ | |
655 | #endif | |
656 | if (!t) | |
657 | printk(KERN_ERR PREFIX "acpi_os_get_timer() TBD\n"); | |
658 | ||
659 | return ++t; | |
660 | } | |
661 | ||
4be44fcd | 662 | acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width) |
1da177e4 LT |
663 | { |
664 | u32 dummy; | |
665 | ||
666 | if (!value) | |
667 | value = &dummy; | |
668 | ||
49fbabf5 ZY |
669 | *value = 0; |
670 | if (width <= 8) { | |
4be44fcd | 671 | *(u8 *) value = inb(port); |
49fbabf5 | 672 | } else if (width <= 16) { |
4be44fcd | 673 | *(u16 *) value = inw(port); |
49fbabf5 | 674 | } else if (width <= 32) { |
4be44fcd | 675 | *(u32 *) value = inl(port); |
49fbabf5 | 676 | } else { |
1da177e4 LT |
677 | BUG(); |
678 | } | |
679 | ||
680 | return AE_OK; | |
681 | } | |
4be44fcd | 682 | |
1da177e4 LT |
683 | EXPORT_SYMBOL(acpi_os_read_port); |
684 | ||
4be44fcd | 685 | acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width) |
1da177e4 | 686 | { |
49fbabf5 | 687 | if (width <= 8) { |
1da177e4 | 688 | outb(value, port); |
49fbabf5 | 689 | } else if (width <= 16) { |
1da177e4 | 690 | outw(value, port); |
49fbabf5 | 691 | } else if (width <= 32) { |
1da177e4 | 692 | outl(value, port); |
49fbabf5 | 693 | } else { |
1da177e4 LT |
694 | BUG(); |
695 | } | |
696 | ||
697 | return AE_OK; | |
698 | } | |
4be44fcd | 699 | |
1da177e4 LT |
700 | EXPORT_SYMBOL(acpi_os_write_port); |
701 | ||
e615bf5b MS |
702 | #ifdef readq |
703 | static inline u64 read64(const volatile void __iomem *addr) | |
704 | { | |
705 | return readq(addr); | |
706 | } | |
707 | #else | |
708 | static inline u64 read64(const volatile void __iomem *addr) | |
709 | { | |
710 | u64 l, h; | |
711 | l = readl(addr); | |
712 | h = readl(addr+4); | |
713 | return l | (h << 32); | |
714 | } | |
715 | #endif | |
716 | ||
717 | acpi_status | |
653f4b53 | 718 | acpi_os_read_memory(acpi_physical_address phys_addr, u64 *value, u32 width) |
e615bf5b MS |
719 | { |
720 | void __iomem *virt_addr; | |
721 | unsigned int size = width / 8; | |
722 | bool unmap = false; | |
723 | u64 dummy; | |
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 | if (!value) | |
736 | value = &dummy; | |
737 | ||
738 | switch (width) { | |
739 | case 8: | |
740 | *(u8 *) value = readb(virt_addr); | |
741 | break; | |
742 | case 16: | |
743 | *(u16 *) value = readw(virt_addr); | |
744 | break; | |
745 | case 32: | |
746 | *(u32 *) value = readl(virt_addr); | |
747 | break; | |
748 | case 64: | |
749 | *(u64 *) value = read64(virt_addr); | |
750 | break; | |
751 | default: | |
752 | BUG(); | |
753 | } | |
754 | ||
755 | if (unmap) | |
756 | iounmap(virt_addr); | |
757 | else | |
758 | rcu_read_unlock(); | |
759 | ||
760 | return AE_OK; | |
761 | } | |
762 | ||
e615bf5b MS |
763 | #ifdef writeq |
764 | static inline void write64(u64 val, volatile void __iomem *addr) | |
765 | { | |
766 | writeq(val, addr); | |
767 | } | |
768 | #else | |
769 | static inline void write64(u64 val, volatile void __iomem *addr) | |
770 | { | |
771 | writel(val, addr); | |
772 | writel(val>>32, addr+4); | |
773 | } | |
774 | #endif | |
775 | ||
776 | acpi_status | |
653f4b53 | 777 | acpi_os_write_memory(acpi_physical_address phys_addr, u64 value, u32 width) |
e615bf5b MS |
778 | { |
779 | void __iomem *virt_addr; | |
780 | unsigned int size = width / 8; | |
781 | bool unmap = false; | |
782 | ||
783 | rcu_read_lock(); | |
784 | virt_addr = acpi_map_vaddr_lookup(phys_addr, size); | |
785 | if (!virt_addr) { | |
786 | rcu_read_unlock(); | |
787 | virt_addr = acpi_os_ioremap(phys_addr, size); | |
788 | if (!virt_addr) | |
789 | return AE_BAD_ADDRESS; | |
790 | unmap = true; | |
791 | } | |
792 | ||
793 | switch (width) { | |
794 | case 8: | |
795 | writeb(value, virt_addr); | |
796 | break; | |
797 | case 16: | |
798 | writew(value, virt_addr); | |
799 | break; | |
800 | case 32: | |
801 | writel(value, virt_addr); | |
802 | break; | |
803 | case 64: | |
804 | write64(value, virt_addr); | |
805 | break; | |
806 | default: | |
807 | BUG(); | |
808 | } | |
809 | ||
810 | if (unmap) | |
811 | iounmap(virt_addr); | |
812 | else | |
813 | rcu_read_unlock(); | |
814 | ||
815 | return AE_OK; | |
816 | } | |
817 | ||
1da177e4 | 818 | acpi_status |
4be44fcd | 819 | acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
c5f0231e | 820 | u64 *value, u32 width) |
1da177e4 LT |
821 | { |
822 | int result, size; | |
c5f0231e | 823 | u32 value32; |
1da177e4 LT |
824 | |
825 | if (!value) | |
826 | return AE_BAD_PARAMETER; | |
827 | ||
828 | switch (width) { | |
829 | case 8: | |
830 | size = 1; | |
831 | break; | |
832 | case 16: | |
833 | size = 2; | |
834 | break; | |
835 | case 32: | |
836 | size = 4; | |
837 | break; | |
838 | default: | |
839 | return AE_ERROR; | |
840 | } | |
841 | ||
b6ce068a MW |
842 | result = raw_pci_read(pci_id->segment, pci_id->bus, |
843 | PCI_DEVFN(pci_id->device, pci_id->function), | |
c5f0231e BM |
844 | reg, size, &value32); |
845 | *value = value32; | |
1da177e4 LT |
846 | |
847 | return (result ? AE_ERROR : AE_OK); | |
848 | } | |
4be44fcd | 849 | |
1da177e4 | 850 | acpi_status |
4be44fcd | 851 | acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
439913ff | 852 | u64 value, u32 width) |
1da177e4 LT |
853 | { |
854 | int result, size; | |
855 | ||
856 | switch (width) { | |
857 | case 8: | |
858 | size = 1; | |
859 | break; | |
860 | case 16: | |
861 | size = 2; | |
862 | break; | |
863 | case 32: | |
864 | size = 4; | |
865 | break; | |
866 | default: | |
867 | return AE_ERROR; | |
868 | } | |
869 | ||
b6ce068a MW |
870 | result = raw_pci_write(pci_id->segment, pci_id->bus, |
871 | PCI_DEVFN(pci_id->device, pci_id->function), | |
872 | reg, size, value); | |
1da177e4 LT |
873 | |
874 | return (result ? AE_ERROR : AE_OK); | |
875 | } | |
876 | ||
65f27f38 | 877 | static void acpi_os_execute_deferred(struct work_struct *work) |
88db5e14 AS |
878 | { |
879 | struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work); | |
88db5e14 | 880 | |
9ac61856 BH |
881 | if (dpc->wait) |
882 | acpi_os_wait_events_complete(NULL); | |
19cd847a ZR |
883 | |
884 | dpc->function(dpc->context); | |
885 | kfree(dpc); | |
19cd847a ZR |
886 | } |
887 | ||
b8d35192 AS |
888 | /******************************************************************************* |
889 | * | |
890 | * FUNCTION: acpi_os_execute | |
891 | * | |
892 | * PARAMETERS: Type - Type of the callback | |
893 | * Function - Function to be executed | |
894 | * Context - Function parameters | |
895 | * | |
896 | * RETURN: Status | |
897 | * | |
898 | * DESCRIPTION: Depending on type, either queues function for deferred execution or | |
899 | * immediately executes function on a separate thread. | |
900 | * | |
901 | ******************************************************************************/ | |
902 | ||
19cd847a ZR |
903 | static acpi_status __acpi_os_execute(acpi_execute_type type, |
904 | acpi_osd_exec_callback function, void *context, int hp) | |
1da177e4 | 905 | { |
4be44fcd LB |
906 | acpi_status status = AE_OK; |
907 | struct acpi_os_dpc *dpc; | |
17bc54ee | 908 | struct workqueue_struct *queue; |
19cd847a | 909 | int ret; |
72945b2b LB |
910 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
911 | "Scheduling function [%p(%p)] for deferred execution.\n", | |
912 | function, context)); | |
1da177e4 | 913 | |
1da177e4 LT |
914 | /* |
915 | * Allocate/initialize DPC structure. Note that this memory will be | |
65f27f38 | 916 | * freed by the callee. The kernel handles the work_struct list in a |
1da177e4 LT |
917 | * way that allows us to also free its memory inside the callee. |
918 | * Because we may want to schedule several tasks with different | |
919 | * parameters we can't use the approach some kernel code uses of | |
65f27f38 | 920 | * having a static work_struct. |
1da177e4 | 921 | */ |
72945b2b | 922 | |
65f27f38 | 923 | dpc = kmalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC); |
1da177e4 | 924 | if (!dpc) |
889c78be | 925 | return AE_NO_MEMORY; |
b976fe19 | 926 | |
1da177e4 LT |
927 | dpc->function = function; |
928 | dpc->context = context; | |
b976fe19 | 929 | |
c02256be ZR |
930 | /* |
931 | * We can't run hotplug code in keventd_wq/kacpid_wq/kacpid_notify_wq | |
932 | * because the hotplug code may call driver .remove() functions, | |
933 | * which invoke flush_scheduled_work/acpi_os_wait_events_complete | |
934 | * to flush these workqueues. | |
935 | */ | |
936 | queue = hp ? kacpi_hotplug_wq : | |
937 | (type == OSL_NOTIFY_HANDLER ? kacpi_notify_wq : kacpid_wq); | |
9ac61856 | 938 | dpc->wait = hp ? 1 : 0; |
bc73675b ZR |
939 | |
940 | if (queue == kacpi_hotplug_wq) | |
941 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); | |
942 | else if (queue == kacpi_notify_wq) | |
943 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); | |
944 | else | |
945 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); | |
946 | ||
8fec62b2 TH |
947 | /* |
948 | * On some machines, a software-initiated SMI causes corruption unless | |
949 | * the SMI runs on CPU 0. An SMI can be initiated by any AML, but | |
950 | * typically it's done in GPE-related methods that are run via | |
951 | * workqueues, so we can avoid the known corruption cases by always | |
952 | * queueing on CPU 0. | |
953 | */ | |
954 | ret = queue_work_on(0, queue, &dpc->work); | |
19cd847a ZR |
955 | |
956 | if (!ret) { | |
55ac9a01 LM |
957 | printk(KERN_ERR PREFIX |
958 | "Call to queue_work() failed.\n"); | |
17bc54ee AS |
959 | status = AE_ERROR; |
960 | kfree(dpc); | |
1da177e4 | 961 | } |
889c78be | 962 | return status; |
1da177e4 | 963 | } |
4be44fcd | 964 | |
19cd847a ZR |
965 | acpi_status acpi_os_execute(acpi_execute_type type, |
966 | acpi_osd_exec_callback function, void *context) | |
967 | { | |
968 | return __acpi_os_execute(type, function, context, 0); | |
969 | } | |
b8d35192 | 970 | EXPORT_SYMBOL(acpi_os_execute); |
1da177e4 | 971 | |
19cd847a ZR |
972 | acpi_status acpi_os_hotplug_execute(acpi_osd_exec_callback function, |
973 | void *context) | |
974 | { | |
975 | return __acpi_os_execute(0, function, context, 1); | |
976 | } | |
977 | ||
4be44fcd | 978 | void acpi_os_wait_events_complete(void *context) |
1da177e4 LT |
979 | { |
980 | flush_workqueue(kacpid_wq); | |
2f67a069 | 981 | flush_workqueue(kacpi_notify_wq); |
1da177e4 | 982 | } |
4be44fcd | 983 | |
1da177e4 LT |
984 | EXPORT_SYMBOL(acpi_os_wait_events_complete); |
985 | ||
1da177e4 | 986 | acpi_status |
4be44fcd | 987 | acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle) |
1da177e4 | 988 | { |
4be44fcd | 989 | struct semaphore *sem = NULL; |
1da177e4 | 990 | |
1da177e4 LT |
991 | sem = acpi_os_allocate(sizeof(struct semaphore)); |
992 | if (!sem) | |
d550d98d | 993 | return AE_NO_MEMORY; |
1da177e4 LT |
994 | memset(sem, 0, sizeof(struct semaphore)); |
995 | ||
996 | sema_init(sem, initial_units); | |
997 | ||
4be44fcd | 998 | *handle = (acpi_handle *) sem; |
1da177e4 | 999 | |
4be44fcd LB |
1000 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n", |
1001 | *handle, initial_units)); | |
1da177e4 | 1002 | |
d550d98d | 1003 | return AE_OK; |
1da177e4 | 1004 | } |
1da177e4 | 1005 | |
1da177e4 LT |
1006 | /* |
1007 | * TODO: A better way to delete semaphores? Linux doesn't have a | |
1008 | * 'delete_semaphore()' function -- may result in an invalid | |
1009 | * pointer dereference for non-synchronized consumers. Should | |
1010 | * we at least check for blocked threads and signal/cancel them? | |
1011 | */ | |
1012 | ||
4be44fcd | 1013 | acpi_status acpi_os_delete_semaphore(acpi_handle handle) |
1da177e4 | 1014 | { |
4be44fcd | 1015 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 1016 | |
1da177e4 | 1017 | if (!sem) |
d550d98d | 1018 | return AE_BAD_PARAMETER; |
1da177e4 | 1019 | |
4be44fcd | 1020 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle)); |
1da177e4 | 1021 | |
f1241c87 | 1022 | BUG_ON(!list_empty(&sem->wait_list)); |
02438d87 | 1023 | kfree(sem); |
4be44fcd | 1024 | sem = NULL; |
1da177e4 | 1025 | |
d550d98d | 1026 | return AE_OK; |
1da177e4 | 1027 | } |
1da177e4 | 1028 | |
1da177e4 | 1029 | /* |
1da177e4 LT |
1030 | * TODO: Support for units > 1? |
1031 | */ | |
4be44fcd | 1032 | acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout) |
1da177e4 | 1033 | { |
4be44fcd LB |
1034 | acpi_status status = AE_OK; |
1035 | struct semaphore *sem = (struct semaphore *)handle; | |
f1241c87 | 1036 | long jiffies; |
4be44fcd | 1037 | int ret = 0; |
1da177e4 | 1038 | |
1da177e4 | 1039 | if (!sem || (units < 1)) |
d550d98d | 1040 | return AE_BAD_PARAMETER; |
1da177e4 LT |
1041 | |
1042 | if (units > 1) | |
d550d98d | 1043 | return AE_SUPPORT; |
1da177e4 | 1044 | |
4be44fcd LB |
1045 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n", |
1046 | handle, units, timeout)); | |
1da177e4 | 1047 | |
f1241c87 MW |
1048 | if (timeout == ACPI_WAIT_FOREVER) |
1049 | jiffies = MAX_SCHEDULE_TIMEOUT; | |
1050 | else | |
1051 | jiffies = msecs_to_jiffies(timeout); | |
1052 | ||
1053 | ret = down_timeout(sem, jiffies); | |
1054 | if (ret) | |
1055 | status = AE_TIME; | |
1da177e4 LT |
1056 | |
1057 | if (ACPI_FAILURE(status)) { | |
9e7e2c04 | 1058 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, |
a6fc6720 | 1059 | "Failed to acquire semaphore[%p|%d|%d], %s", |
4be44fcd LB |
1060 | handle, units, timeout, |
1061 | acpi_format_exception(status))); | |
1062 | } else { | |
1063 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, | |
a6fc6720 | 1064 | "Acquired semaphore[%p|%d|%d]", handle, |
4be44fcd | 1065 | units, timeout)); |
1da177e4 LT |
1066 | } |
1067 | ||
d550d98d | 1068 | return status; |
1da177e4 | 1069 | } |
1da177e4 | 1070 | |
1da177e4 LT |
1071 | /* |
1072 | * TODO: Support for units > 1? | |
1073 | */ | |
4be44fcd | 1074 | acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units) |
1da177e4 | 1075 | { |
4be44fcd | 1076 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 1077 | |
1da177e4 | 1078 | if (!sem || (units < 1)) |
d550d98d | 1079 | return AE_BAD_PARAMETER; |
1da177e4 LT |
1080 | |
1081 | if (units > 1) | |
d550d98d | 1082 | return AE_SUPPORT; |
1da177e4 | 1083 | |
4be44fcd LB |
1084 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle, |
1085 | units)); | |
1da177e4 LT |
1086 | |
1087 | up(sem); | |
1088 | ||
d550d98d | 1089 | return AE_OK; |
1da177e4 | 1090 | } |
4be44fcd | 1091 | |
1da177e4 | 1092 | #ifdef ACPI_FUTURE_USAGE |
4be44fcd | 1093 | u32 acpi_os_get_line(char *buffer) |
1da177e4 LT |
1094 | { |
1095 | ||
1096 | #ifdef ENABLE_DEBUGGER | |
1097 | if (acpi_in_debugger) { | |
1098 | u32 chars; | |
1099 | ||
1100 | kdb_read(buffer, sizeof(line_buf)); | |
1101 | ||
1102 | /* remove the CR kdb includes */ | |
1103 | chars = strlen(buffer) - 1; | |
1104 | buffer[chars] = '\0'; | |
1105 | } | |
1106 | #endif | |
1107 | ||
1108 | return 0; | |
1109 | } | |
4be44fcd | 1110 | #endif /* ACPI_FUTURE_USAGE */ |
1da177e4 | 1111 | |
4be44fcd | 1112 | acpi_status acpi_os_signal(u32 function, void *info) |
1da177e4 | 1113 | { |
4be44fcd | 1114 | switch (function) { |
1da177e4 LT |
1115 | case ACPI_SIGNAL_FATAL: |
1116 | printk(KERN_ERR PREFIX "Fatal opcode executed\n"); | |
1117 | break; | |
1118 | case ACPI_SIGNAL_BREAKPOINT: | |
1119 | /* | |
1120 | * AML Breakpoint | |
1121 | * ACPI spec. says to treat it as a NOP unless | |
1122 | * you are debugging. So if/when we integrate | |
1123 | * AML debugger into the kernel debugger its | |
1124 | * hook will go here. But until then it is | |
1125 | * not useful to print anything on breakpoints. | |
1126 | */ | |
1127 | break; | |
1128 | default: | |
1129 | break; | |
1130 | } | |
1131 | ||
1132 | return AE_OK; | |
1133 | } | |
4be44fcd | 1134 | |
4be44fcd | 1135 | static int __init acpi_os_name_setup(char *str) |
1da177e4 LT |
1136 | { |
1137 | char *p = acpi_os_name; | |
4be44fcd | 1138 | int count = ACPI_MAX_OVERRIDE_LEN - 1; |
1da177e4 LT |
1139 | |
1140 | if (!str || !*str) | |
1141 | return 0; | |
1142 | ||
1143 | for (; count-- && str && *str; str++) { | |
1144 | if (isalnum(*str) || *str == ' ' || *str == ':') | |
1145 | *p++ = *str; | |
1146 | else if (*str == '\'' || *str == '"') | |
1147 | continue; | |
1148 | else | |
1149 | break; | |
1150 | } | |
1151 | *p = 0; | |
1152 | ||
1153 | return 1; | |
4be44fcd | 1154 | |
1da177e4 LT |
1155 | } |
1156 | ||
1157 | __setup("acpi_os_name=", acpi_os_name_setup); | |
1158 | ||
12d32064 LM |
1159 | #define OSI_STRING_LENGTH_MAX 64 /* arbitrary */ |
1160 | #define OSI_STRING_ENTRIES_MAX 16 /* arbitrary */ | |
1161 | ||
1162 | struct osi_setup_entry { | |
1163 | char string[OSI_STRING_LENGTH_MAX]; | |
1164 | bool enable; | |
1165 | }; | |
1166 | ||
aa165971 SL |
1167 | static struct osi_setup_entry __initdata |
1168 | osi_setup_entries[OSI_STRING_ENTRIES_MAX] = { | |
1169 | {"Module Device", true}, | |
1170 | {"Processor Device", true}, | |
1171 | {"3.0 _SCP Extensions", true}, | |
1172 | {"Processor Aggregator Device", true}, | |
1173 | }; | |
12d32064 | 1174 | |
d90aa92c LM |
1175 | void __init acpi_osi_setup(char *str) |
1176 | { | |
12d32064 LM |
1177 | struct osi_setup_entry *osi; |
1178 | bool enable = true; | |
1179 | int i; | |
1180 | ||
d90aa92c LM |
1181 | if (!acpi_gbl_create_osi_method) |
1182 | return; | |
1183 | ||
1184 | if (str == NULL || *str == '\0') { | |
1185 | printk(KERN_INFO PREFIX "_OSI method disabled\n"); | |
1186 | acpi_gbl_create_osi_method = FALSE; | |
12d32064 LM |
1187 | return; |
1188 | } | |
1189 | ||
1190 | if (*str == '!') { | |
1191 | str++; | |
1192 | enable = false; | |
1193 | } | |
1194 | ||
1195 | for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { | |
1196 | osi = &osi_setup_entries[i]; | |
1197 | if (!strcmp(osi->string, str)) { | |
1198 | osi->enable = enable; | |
1199 | break; | |
1200 | } else if (osi->string[0] == '\0') { | |
1201 | osi->enable = enable; | |
1202 | strncpy(osi->string, str, OSI_STRING_LENGTH_MAX); | |
1203 | break; | |
1204 | } | |
1205 | } | |
d90aa92c LM |
1206 | } |
1207 | ||
d4b7dc49 LB |
1208 | static void __init set_osi_linux(unsigned int enable) |
1209 | { | |
d90aa92c | 1210 | if (osi_linux.enable != enable) |
d4b7dc49 | 1211 | osi_linux.enable = enable; |
b0ed7a91 LM |
1212 | |
1213 | if (osi_linux.enable) | |
1214 | acpi_osi_setup("Linux"); | |
1215 | else | |
1216 | acpi_osi_setup("!Linux"); | |
1217 | ||
d4b7dc49 LB |
1218 | return; |
1219 | } | |
1220 | ||
1221 | static void __init acpi_cmdline_osi_linux(unsigned int enable) | |
1222 | { | |
d90aa92c LM |
1223 | osi_linux.cmdline = 1; /* cmdline set the default and override DMI */ |
1224 | osi_linux.dmi = 0; | |
d4b7dc49 LB |
1225 | set_osi_linux(enable); |
1226 | ||
1227 | return; | |
1228 | } | |
1229 | ||
1230 | void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d) | |
1231 | { | |
d4b7dc49 LB |
1232 | printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident); |
1233 | ||
1234 | if (enable == -1) | |
1235 | return; | |
1236 | ||
d90aa92c | 1237 | osi_linux.dmi = 1; /* DMI knows that this box asks OSI(Linux) */ |
d4b7dc49 | 1238 | set_osi_linux(enable); |
f507654d | 1239 | |
f507654d LB |
1240 | return; |
1241 | } | |
1242 | ||
1da177e4 | 1243 | /* |
ae00d812 LB |
1244 | * Modify the list of "OS Interfaces" reported to BIOS via _OSI |
1245 | * | |
1da177e4 | 1246 | * empty string disables _OSI |
ae00d812 LB |
1247 | * string starting with '!' disables that string |
1248 | * otherwise string is added to list, augmenting built-in strings | |
1da177e4 | 1249 | */ |
b0ed7a91 | 1250 | static void __init acpi_osi_setup_late(void) |
1da177e4 | 1251 | { |
12d32064 LM |
1252 | struct osi_setup_entry *osi; |
1253 | char *str; | |
1254 | int i; | |
d90aa92c | 1255 | acpi_status status; |
b0ed7a91 | 1256 | |
12d32064 LM |
1257 | for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { |
1258 | osi = &osi_setup_entries[i]; | |
1259 | str = osi->string; | |
b0ed7a91 | 1260 | |
12d32064 LM |
1261 | if (*str == '\0') |
1262 | break; | |
1263 | if (osi->enable) { | |
1264 | status = acpi_install_interface(str); | |
d90aa92c | 1265 | |
12d32064 LM |
1266 | if (ACPI_SUCCESS(status)) |
1267 | printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str); | |
1268 | } else { | |
1269 | status = acpi_remove_interface(str); | |
d90aa92c | 1270 | |
12d32064 LM |
1271 | if (ACPI_SUCCESS(status)) |
1272 | printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str); | |
1273 | } | |
b0ed7a91 LM |
1274 | } |
1275 | } | |
1276 | ||
d90aa92c | 1277 | static int __init osi_setup(char *str) |
b0ed7a91 | 1278 | { |
d90aa92c LM |
1279 | if (str && !strcmp("Linux", str)) |
1280 | acpi_cmdline_osi_linux(1); | |
1281 | else if (str && !strcmp("!Linux", str)) | |
1282 | acpi_cmdline_osi_linux(0); | |
1283 | else | |
1284 | acpi_osi_setup(str); | |
1da177e4 LT |
1285 | |
1286 | return 1; | |
1287 | } | |
1288 | ||
d90aa92c | 1289 | __setup("acpi_osi=", osi_setup); |
1da177e4 LT |
1290 | |
1291 | /* enable serialization to combat AE_ALREADY_EXISTS errors */ | |
4be44fcd | 1292 | static int __init acpi_serialize_setup(char *str) |
1da177e4 LT |
1293 | { |
1294 | printk(KERN_INFO PREFIX "serialize enabled\n"); | |
1295 | ||
1296 | acpi_gbl_all_methods_serialized = TRUE; | |
1297 | ||
1298 | return 1; | |
1299 | } | |
1300 | ||
1301 | __setup("acpi_serialize", acpi_serialize_setup); | |
1302 | ||
df92e695 TR |
1303 | /* Check of resource interference between native drivers and ACPI |
1304 | * OperationRegions (SystemIO and System Memory only). | |
1305 | * IO ports and memory declared in ACPI might be used by the ACPI subsystem | |
1306 | * in arbitrary AML code and can interfere with legacy drivers. | |
1307 | * acpi_enforce_resources= can be set to: | |
1308 | * | |
7e90560c | 1309 | * - strict (default) (2) |
df92e695 | 1310 | * -> further driver trying to access the resources will not load |
7e90560c | 1311 | * - lax (1) |
df92e695 TR |
1312 | * -> further driver trying to access the resources will load, but you |
1313 | * get a system message that something might go wrong... | |
1314 | * | |
1315 | * - no (0) | |
1316 | * -> ACPI Operation Region resources will not be registered | |
1317 | * | |
1318 | */ | |
1319 | #define ENFORCE_RESOURCES_STRICT 2 | |
1320 | #define ENFORCE_RESOURCES_LAX 1 | |
1321 | #define ENFORCE_RESOURCES_NO 0 | |
1322 | ||
7e90560c | 1323 | static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; |
df92e695 TR |
1324 | |
1325 | static int __init acpi_enforce_resources_setup(char *str) | |
1326 | { | |
1327 | if (str == NULL || *str == '\0') | |
1328 | return 0; | |
1329 | ||
1330 | if (!strcmp("strict", str)) | |
1331 | acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; | |
1332 | else if (!strcmp("lax", str)) | |
1333 | acpi_enforce_resources = ENFORCE_RESOURCES_LAX; | |
1334 | else if (!strcmp("no", str)) | |
1335 | acpi_enforce_resources = ENFORCE_RESOURCES_NO; | |
1336 | ||
1337 | return 1; | |
1338 | } | |
1339 | ||
1340 | __setup("acpi_enforce_resources=", acpi_enforce_resources_setup); | |
1341 | ||
1342 | /* Check for resource conflicts between ACPI OperationRegions and native | |
1343 | * drivers */ | |
876fba43 | 1344 | int acpi_check_resource_conflict(const struct resource *res) |
df92e695 | 1345 | { |
f654c0fe LM |
1346 | acpi_adr_space_type space_id; |
1347 | acpi_size length; | |
1348 | u8 warn = 0; | |
1349 | int clash = 0; | |
df92e695 TR |
1350 | |
1351 | if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) | |
1352 | return 0; | |
1353 | if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM)) | |
1354 | return 0; | |
1355 | ||
f654c0fe LM |
1356 | if (res->flags & IORESOURCE_IO) |
1357 | space_id = ACPI_ADR_SPACE_SYSTEM_IO; | |
1358 | else | |
1359 | space_id = ACPI_ADR_SPACE_SYSTEM_MEMORY; | |
df92e695 | 1360 | |
f654c0fe LM |
1361 | length = res->end - res->start + 1; |
1362 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) | |
1363 | warn = 1; | |
1364 | clash = acpi_check_address_range(space_id, res->start, length, warn); | |
df92e695 TR |
1365 | |
1366 | if (clash) { | |
1367 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) { | |
14f03343 JD |
1368 | if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX) |
1369 | printk(KERN_NOTICE "ACPI: This conflict may" | |
1370 | " cause random problems and system" | |
1371 | " instability\n"); | |
1372 | printk(KERN_INFO "ACPI: If an ACPI driver is available" | |
1373 | " for this device, you should use it instead of" | |
1374 | " the native driver\n"); | |
df92e695 TR |
1375 | } |
1376 | if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT) | |
1377 | return -EBUSY; | |
1378 | } | |
1379 | return 0; | |
1380 | } | |
443dea72 | 1381 | EXPORT_SYMBOL(acpi_check_resource_conflict); |
df92e695 TR |
1382 | |
1383 | int acpi_check_region(resource_size_t start, resource_size_t n, | |
1384 | const char *name) | |
1385 | { | |
1386 | struct resource res = { | |
1387 | .start = start, | |
1388 | .end = start + n - 1, | |
1389 | .name = name, | |
1390 | .flags = IORESOURCE_IO, | |
1391 | }; | |
1392 | ||
1393 | return acpi_check_resource_conflict(&res); | |
1394 | } | |
1395 | EXPORT_SYMBOL(acpi_check_region); | |
1396 | ||
70dd6bea JD |
1397 | /* |
1398 | * Let drivers know whether the resource checks are effective | |
1399 | */ | |
1400 | int acpi_resources_are_enforced(void) | |
1401 | { | |
1402 | return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT; | |
1403 | } | |
1404 | EXPORT_SYMBOL(acpi_resources_are_enforced); | |
1405 | ||
9f63b88b LM |
1406 | /* |
1407 | * Deallocate the memory for a spinlock. | |
1408 | */ | |
1409 | void acpi_os_delete_lock(acpi_spinlock handle) | |
1410 | { | |
1411 | ACPI_FREE(handle); | |
1412 | } | |
1413 | ||
73459f73 RM |
1414 | /* |
1415 | * Acquire a spinlock. | |
1416 | * | |
1417 | * handle is a pointer to the spinlock_t. | |
73459f73 RM |
1418 | */ |
1419 | ||
967440e3 | 1420 | acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp) |
73459f73 | 1421 | { |
b8e4d893 | 1422 | acpi_cpu_flags flags; |
967440e3 | 1423 | spin_lock_irqsave(lockp, flags); |
73459f73 RM |
1424 | return flags; |
1425 | } | |
1426 | ||
1427 | /* | |
1428 | * Release a spinlock. See above. | |
1429 | */ | |
1430 | ||
967440e3 | 1431 | void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags) |
73459f73 | 1432 | { |
967440e3 | 1433 | spin_unlock_irqrestore(lockp, flags); |
73459f73 RM |
1434 | } |
1435 | ||
73459f73 RM |
1436 | #ifndef ACPI_USE_LOCAL_CACHE |
1437 | ||
1438 | /******************************************************************************* | |
1439 | * | |
1440 | * FUNCTION: acpi_os_create_cache | |
1441 | * | |
b229cf92 BM |
1442 | * PARAMETERS: name - Ascii name for the cache |
1443 | * size - Size of each cached object | |
1444 | * depth - Maximum depth of the cache (in objects) <ignored> | |
1445 | * cache - Where the new cache object is returned | |
73459f73 | 1446 | * |
b229cf92 | 1447 | * RETURN: status |
73459f73 RM |
1448 | * |
1449 | * DESCRIPTION: Create a cache object | |
1450 | * | |
1451 | ******************************************************************************/ | |
1452 | ||
1453 | acpi_status | |
4be44fcd | 1454 | acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache) |
73459f73 | 1455 | { |
20c2df83 | 1456 | *cache = kmem_cache_create(name, size, 0, 0, NULL); |
a6fdbf90 | 1457 | if (*cache == NULL) |
b229cf92 BM |
1458 | return AE_ERROR; |
1459 | else | |
1460 | return AE_OK; | |
73459f73 RM |
1461 | } |
1462 | ||
1463 | /******************************************************************************* | |
1464 | * | |
1465 | * FUNCTION: acpi_os_purge_cache | |
1466 | * | |
1467 | * PARAMETERS: Cache - Handle to cache object | |
1468 | * | |
1469 | * RETURN: Status | |
1470 | * | |
1471 | * DESCRIPTION: Free all objects within the requested cache. | |
1472 | * | |
1473 | ******************************************************************************/ | |
1474 | ||
4be44fcd | 1475 | acpi_status acpi_os_purge_cache(acpi_cache_t * cache) |
73459f73 | 1476 | { |
50dd0969 | 1477 | kmem_cache_shrink(cache); |
4be44fcd | 1478 | return (AE_OK); |
73459f73 RM |
1479 | } |
1480 | ||
1481 | /******************************************************************************* | |
1482 | * | |
1483 | * FUNCTION: acpi_os_delete_cache | |
1484 | * | |
1485 | * PARAMETERS: Cache - Handle to cache object | |
1486 | * | |
1487 | * RETURN: Status | |
1488 | * | |
1489 | * DESCRIPTION: Free all objects within the requested cache and delete the | |
1490 | * cache object. | |
1491 | * | |
1492 | ******************************************************************************/ | |
1493 | ||
4be44fcd | 1494 | acpi_status acpi_os_delete_cache(acpi_cache_t * cache) |
73459f73 | 1495 | { |
1a1d92c1 | 1496 | kmem_cache_destroy(cache); |
4be44fcd | 1497 | return (AE_OK); |
73459f73 RM |
1498 | } |
1499 | ||
1500 | /******************************************************************************* | |
1501 | * | |
1502 | * FUNCTION: acpi_os_release_object | |
1503 | * | |
1504 | * PARAMETERS: Cache - Handle to cache object | |
1505 | * Object - The object to be released | |
1506 | * | |
1507 | * RETURN: None | |
1508 | * | |
1509 | * DESCRIPTION: Release an object to the specified cache. If cache is full, | |
1510 | * the object is deleted. | |
1511 | * | |
1512 | ******************************************************************************/ | |
1513 | ||
4be44fcd | 1514 | acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object) |
73459f73 | 1515 | { |
4be44fcd LB |
1516 | kmem_cache_free(cache, object); |
1517 | return (AE_OK); | |
73459f73 | 1518 | } |
73459f73 | 1519 | #endif |
d362edaf MS |
1520 | |
1521 | acpi_status __init acpi_os_initialize(void) | |
1522 | { | |
1523 | acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block); | |
1524 | acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block); | |
1525 | acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block); | |
1526 | acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block); | |
1527 | ||
1528 | return AE_OK; | |
1529 | } | |
1530 | ||
32d47eef | 1531 | acpi_status __init acpi_os_initialize1(void) |
d362edaf | 1532 | { |
44d2588e TH |
1533 | kacpid_wq = alloc_workqueue("kacpid", 0, 1); |
1534 | kacpi_notify_wq = alloc_workqueue("kacpi_notify", 0, 1); | |
1535 | kacpi_hotplug_wq = alloc_workqueue("kacpi_hotplug", 0, 1); | |
d362edaf MS |
1536 | BUG_ON(!kacpid_wq); |
1537 | BUG_ON(!kacpi_notify_wq); | |
1538 | BUG_ON(!kacpi_hotplug_wq); | |
1bd64d42 LB |
1539 | acpi_install_interface_handler(acpi_osi_handler); |
1540 | acpi_osi_setup_late(); | |
d362edaf MS |
1541 | return AE_OK; |
1542 | } | |
1543 | ||
1544 | acpi_status acpi_os_terminate(void) | |
1545 | { | |
1546 | if (acpi_irq_handler) { | |
23fe3630 | 1547 | acpi_os_remove_interrupt_handler(acpi_gbl_FADT.sci_interrupt, |
d362edaf MS |
1548 | acpi_irq_handler); |
1549 | } | |
1550 | ||
1551 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe1_block); | |
1552 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block); | |
1553 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block); | |
1554 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block); | |
1555 | ||
1556 | destroy_workqueue(kacpid_wq); | |
1557 | destroy_workqueue(kacpi_notify_wq); | |
1558 | destroy_workqueue(kacpi_hotplug_wq); | |
1559 | ||
1560 | return AE_OK; | |
1561 | } |