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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 | * | |
1da177e4 LT |
22 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
23 | * | |
24 | */ | |
25 | ||
1da177e4 LT |
26 | #include <linux/module.h> |
27 | #include <linux/kernel.h> | |
28 | #include <linux/slab.h> | |
29 | #include <linux/mm.h> | |
ba242d5b | 30 | #include <linux/highmem.h> |
1da177e4 | 31 | #include <linux/pci.h> |
1da177e4 LT |
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> | |
ad71860a | 37 | #include <linux/acpi.h> |
1da177e4 | 38 | #include <linux/efi.h> |
df92e695 TR |
39 | #include <linux/ioport.h> |
40 | #include <linux/list.h> | |
f1241c87 MW |
41 | #include <linux/jiffies.h> |
42 | #include <linux/semaphore.h> | |
43 | ||
44 | #include <asm/io.h> | |
45 | #include <asm/uaccess.h> | |
2f8e2c87 | 46 | #include <linux/io-64-nonatomic-lo-hi.h> |
f1241c87 | 47 | |
1129c92f | 48 | #include "internal.h" |
1da177e4 | 49 | |
1da177e4 | 50 | #define _COMPONENT ACPI_OS_SERVICES |
f52fd66d | 51 | ACPI_MODULE_NAME("osl"); |
07070e12 | 52 | |
4be44fcd LB |
53 | struct acpi_os_dpc { |
54 | acpi_osd_exec_callback function; | |
55 | void *context; | |
65f27f38 | 56 | struct work_struct work; |
1da177e4 LT |
57 | }; |
58 | ||
1da177e4 LT |
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); | |
4be44fcd | 65 | #endif /*ENABLE_DEBUGGER */ |
1da177e4 | 66 | |
09f98a82 TL |
67 | static int (*__acpi_os_prepare_sleep)(u8 sleep_state, u32 pm1a_ctrl, |
68 | u32 pm1b_ctrl); | |
d6b47b12 BG |
69 | static int (*__acpi_os_prepare_extended_sleep)(u8 sleep_state, u32 val_a, |
70 | u32 val_b); | |
09f98a82 | 71 | |
1da177e4 LT |
72 | static acpi_osd_handler acpi_irq_handler; |
73 | static void *acpi_irq_context; | |
74 | static struct workqueue_struct *kacpid_wq; | |
88db5e14 | 75 | static struct workqueue_struct *kacpi_notify_wq; |
92d8aff3 | 76 | static struct workqueue_struct *kacpi_hotplug_wq; |
7901a052 | 77 | static bool acpi_os_initialized; |
49e4b843 | 78 | unsigned int acpi_sci_irq = INVALID_ACPI_IRQ; |
1da177e4 | 79 | |
620242ae MS |
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; | |
b7c1fadd | 89 | unsigned long refcount; |
620242ae MS |
90 | }; |
91 | ||
92 | static LIST_HEAD(acpi_ioremaps); | |
7bbb8903 | 93 | static DEFINE_MUTEX(acpi_ioremap_lock); |
620242ae | 94 | |
bc9ffce2 | 95 | static void __init acpi_request_region (struct acpi_generic_address *gas, |
9a47cdb1 BH |
96 | unsigned int length, char *desc) |
97 | { | |
bc9ffce2 MS |
98 | u64 addr; |
99 | ||
100 | /* Handle possible alignment issues */ | |
101 | memcpy(&addr, &gas->address, sizeof(addr)); | |
102 | if (!addr || !length) | |
9a47cdb1 BH |
103 | return; |
104 | ||
0294112e RW |
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); | |
9a47cdb1 BH |
110 | } |
111 | ||
0294112e | 112 | static int __init acpi_reserve_resources(void) |
9a47cdb1 | 113 | { |
eee3c859 | 114 | acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
115 | "ACPI PM1a_EVT_BLK"); |
116 | ||
eee3c859 | 117 | acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
118 | "ACPI PM1b_EVT_BLK"); |
119 | ||
eee3c859 | 120 | acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
121 | "ACPI PM1a_CNT_BLK"); |
122 | ||
eee3c859 | 123 | acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
124 | "ACPI PM1b_CNT_BLK"); |
125 | ||
eee3c859 LB |
126 | if (acpi_gbl_FADT.pm_timer_length == 4) |
127 | acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR"); | |
9a47cdb1 | 128 | |
eee3c859 | 129 | acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length, |
9a47cdb1 BH |
130 | "ACPI PM2_CNT_BLK"); |
131 | ||
132 | /* Length of GPE blocks must be a non-negative multiple of 2 */ | |
133 | ||
eee3c859 LB |
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"); | |
9a47cdb1 | 137 | |
eee3c859 LB |
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"); | |
0294112e RW |
141 | |
142 | return 0; | |
9a47cdb1 | 143 | } |
0294112e | 144 | fs_initcall_sync(acpi_reserve_resources); |
9a47cdb1 | 145 | |
4be44fcd | 146 | void acpi_os_printf(const char *fmt, ...) |
1da177e4 LT |
147 | { |
148 | va_list args; | |
149 | va_start(args, fmt); | |
150 | acpi_os_vprintf(fmt, args); | |
151 | va_end(args); | |
152 | } | |
836d0830 | 153 | EXPORT_SYMBOL(acpi_os_printf); |
4be44fcd | 154 | |
4be44fcd | 155 | void acpi_os_vprintf(const char *fmt, va_list args) |
1da177e4 LT |
156 | { |
157 | static char buffer[512]; | |
4be44fcd | 158 | |
1da177e4 LT |
159 | vsprintf(buffer, fmt, args); |
160 | ||
161 | #ifdef ENABLE_DEBUGGER | |
162 | if (acpi_in_debugger) { | |
163 | kdb_printf("%s", buffer); | |
164 | } else { | |
4d939155 | 165 | printk(KERN_CONT "%s", buffer); |
1da177e4 LT |
166 | } |
167 | #else | |
836d0830 | 168 | if (acpi_debugger_write_log(buffer) < 0) |
8cfb0cdf | 169 | printk(KERN_CONT "%s", buffer); |
1da177e4 LT |
170 | #endif |
171 | } | |
172 | ||
4996c023 TI |
173 | #ifdef CONFIG_KEXEC |
174 | static unsigned long acpi_rsdp; | |
175 | static int __init setup_acpi_rsdp(char *arg) | |
176 | { | |
3d915894 CJ |
177 | if (kstrtoul(arg, 16, &acpi_rsdp)) |
178 | return -EINVAL; | |
4996c023 TI |
179 | return 0; |
180 | } | |
181 | early_param("acpi_rsdp", setup_acpi_rsdp); | |
182 | #endif | |
183 | ||
ad71860a | 184 | acpi_physical_address __init acpi_os_get_root_pointer(void) |
1da177e4 | 185 | { |
4996c023 TI |
186 | #ifdef CONFIG_KEXEC |
187 | if (acpi_rsdp) | |
188 | return acpi_rsdp; | |
189 | #endif | |
190 | ||
83e68189 | 191 | if (efi_enabled(EFI_CONFIG_TABLES)) { |
b2c99e3c | 192 | if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) |
ad71860a | 193 | return efi.acpi20; |
b2c99e3c | 194 | else if (efi.acpi != EFI_INVALID_TABLE_ADDR) |
ad71860a | 195 | return efi.acpi; |
1da177e4 | 196 | else { |
4be44fcd LB |
197 | printk(KERN_ERR PREFIX |
198 | "System description tables not found\n"); | |
ad71860a | 199 | return 0; |
1da177e4 | 200 | } |
8a1664be | 201 | } else if (IS_ENABLED(CONFIG_ACPI_LEGACY_TABLES_LOOKUP)) { |
239665a3 LB |
202 | acpi_physical_address pa = 0; |
203 | ||
204 | acpi_find_root_pointer(&pa); | |
205 | return pa; | |
206 | } | |
8a1664be GG |
207 | |
208 | return 0; | |
1da177e4 LT |
209 | } |
210 | ||
78cdb3ed | 211 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ |
4a3cba5e MS |
212 | static struct acpi_ioremap * |
213 | acpi_map_lookup(acpi_physical_address phys, acpi_size size) | |
620242ae MS |
214 | { |
215 | struct acpi_ioremap *map; | |
216 | ||
78cdb3ed | 217 | list_for_each_entry_rcu(map, &acpi_ioremaps, list) |
620242ae MS |
218 | if (map->phys <= phys && |
219 | phys + size <= map->phys + map->size) | |
4a3cba5e MS |
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); | |
620242ae MS |
234 | |
235 | return NULL; | |
236 | } | |
237 | ||
13606a2d RW |
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 | ||
78cdb3ed | 254 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ |
620242ae MS |
255 | static struct acpi_ioremap * |
256 | acpi_map_lookup_virt(void __iomem *virt, acpi_size size) | |
257 | { | |
258 | struct acpi_ioremap *map; | |
259 | ||
78cdb3ed | 260 | list_for_each_entry_rcu(map, &acpi_ioremaps, list) |
4a3cba5e MS |
261 | if (map->virt <= virt && |
262 | virt + size <= map->virt + map->size) | |
620242ae MS |
263 | return map; |
264 | ||
265 | return NULL; | |
266 | } | |
267 | ||
aafc65c7 | 268 | #if defined(CONFIG_IA64) || defined(CONFIG_ARM64) |
ba242d5b MS |
269 | /* ioremap will take care of cache attributes */ |
270 | #define should_use_kmap(pfn) 0 | |
aafc65c7 GG |
271 | #else |
272 | #define should_use_kmap(pfn) page_is_ram(pfn) | |
ba242d5b MS |
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; | |
e252675f | 293 | if (should_use_kmap(pfn)) |
ba242d5b MS |
294 | kunmap(pfn_to_page(pfn)); |
295 | else | |
296 | iounmap(vaddr); | |
297 | } | |
298 | ||
9d128ed1 RW |
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 | */ | |
bd721ea7 | 312 | void __iomem *__ref |
a238317c | 313 | acpi_os_map_iomem(acpi_physical_address phys, acpi_size size) |
1da177e4 | 314 | { |
7ffd0443 | 315 | struct acpi_ioremap *map; |
620242ae | 316 | void __iomem *virt; |
2d6d9fd3 RW |
317 | acpi_physical_address pg_off; |
318 | acpi_size pg_sz; | |
620242ae | 319 | |
9f4fd61f BH |
320 | if (phys > ULONG_MAX) { |
321 | printk(KERN_ERR PREFIX "Cannot map memory that high\n"); | |
70c0846e | 322 | return NULL; |
1da177e4 | 323 | } |
620242ae MS |
324 | |
325 | if (!acpi_gbl_permanent_mmap) | |
ad71860a | 326 | return __acpi_map_table((unsigned long)phys, size); |
620242ae | 327 | |
7ffd0443 RW |
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) { | |
b7c1fadd | 332 | map->refcount++; |
7ffd0443 RW |
333 | goto out; |
334 | } | |
335 | ||
620242ae | 336 | map = kzalloc(sizeof(*map), GFP_KERNEL); |
7ffd0443 RW |
337 | if (!map) { |
338 | mutex_unlock(&acpi_ioremap_lock); | |
620242ae | 339 | return NULL; |
7ffd0443 | 340 | } |
620242ae | 341 | |
4a3cba5e MS |
342 | pg_off = round_down(phys, PAGE_SIZE); |
343 | pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off; | |
ba242d5b | 344 | virt = acpi_map(pg_off, pg_sz); |
620242ae | 345 | if (!virt) { |
7ffd0443 | 346 | mutex_unlock(&acpi_ioremap_lock); |
620242ae MS |
347 | kfree(map); |
348 | return NULL; | |
349 | } | |
350 | ||
351 | INIT_LIST_HEAD(&map->list); | |
352 | map->virt = virt; | |
4a3cba5e MS |
353 | map->phys = pg_off; |
354 | map->size = pg_sz; | |
b7c1fadd | 355 | map->refcount = 1; |
620242ae | 356 | |
78cdb3ed | 357 | list_add_tail_rcu(&map->list, &acpi_ioremaps); |
620242ae | 358 | |
a238317c | 359 | out: |
7ffd0443 | 360 | mutex_unlock(&acpi_ioremap_lock); |
4a3cba5e | 361 | return map->virt + (phys - map->phys); |
1da177e4 | 362 | } |
a238317c LZ |
363 | EXPORT_SYMBOL_GPL(acpi_os_map_iomem); |
364 | ||
bd721ea7 | 365 | void *__ref acpi_os_map_memory(acpi_physical_address phys, acpi_size size) |
a238317c LZ |
366 | { |
367 | return (void *)acpi_os_map_iomem(phys, size); | |
368 | } | |
55a82ab3 | 369 | EXPORT_SYMBOL_GPL(acpi_os_map_memory); |
1da177e4 | 370 | |
b7c1fadd | 371 | static void acpi_os_drop_map_ref(struct acpi_ioremap *map) |
4a3cba5e | 372 | { |
b7c1fadd RW |
373 | if (!--map->refcount) |
374 | list_del_rcu(&map->list); | |
4a3cba5e | 375 | } |
4a3cba5e | 376 | |
b7c1fadd | 377 | static void acpi_os_map_cleanup(struct acpi_ioremap *map) |
7fe135dc | 378 | { |
b7c1fadd | 379 | if (!map->refcount) { |
74b51ee1 | 380 | synchronize_rcu_expedited(); |
ba242d5b | 381 | acpi_unmap(map->phys, map->virt); |
b7c1fadd RW |
382 | kfree(map); |
383 | } | |
4a3cba5e MS |
384 | } |
385 | ||
9d128ed1 RW |
386 | /** |
387 | * acpi_os_unmap_iomem - Drop a memory mapping reference. | |
388 | * @virt: Start of the address range to drop a reference to. | |
389 | * @size: Size of the address range to drop a reference to. | |
390 | * | |
391 | * Look up the given virtual address range in the list of existing ACPI memory | |
392 | * mappings, drop a reference to it and unmap it if there are no more active | |
393 | * references to it. | |
394 | * | |
395 | * During early init (when acpi_gbl_permanent_mmap has not been set yet) this | |
396 | * routine simply calls __acpi_unmap_table() to get the job done. Since | |
397 | * __acpi_unmap_table() is an __init function, the __ref annotation is needed | |
398 | * here. | |
399 | */ | |
a238317c | 400 | void __ref acpi_os_unmap_iomem(void __iomem *virt, acpi_size size) |
1da177e4 | 401 | { |
620242ae | 402 | struct acpi_ioremap *map; |
620242ae MS |
403 | |
404 | if (!acpi_gbl_permanent_mmap) { | |
7d97277b | 405 | __acpi_unmap_table(virt, size); |
620242ae MS |
406 | return; |
407 | } | |
408 | ||
7bbb8903 | 409 | mutex_lock(&acpi_ioremap_lock); |
620242ae MS |
410 | map = acpi_map_lookup_virt(virt, size); |
411 | if (!map) { | |
7bbb8903 | 412 | mutex_unlock(&acpi_ioremap_lock); |
7fe135dc | 413 | WARN(true, PREFIX "%s: bad address %p\n", __func__, virt); |
620242ae MS |
414 | return; |
415 | } | |
b7c1fadd | 416 | acpi_os_drop_map_ref(map); |
7bbb8903 | 417 | mutex_unlock(&acpi_ioremap_lock); |
620242ae | 418 | |
b7c1fadd | 419 | acpi_os_map_cleanup(map); |
1da177e4 | 420 | } |
a238317c LZ |
421 | EXPORT_SYMBOL_GPL(acpi_os_unmap_iomem); |
422 | ||
423 | void __ref acpi_os_unmap_memory(void *virt, acpi_size size) | |
424 | { | |
425 | return acpi_os_unmap_iomem((void __iomem *)virt, size); | |
426 | } | |
55a82ab3 | 427 | EXPORT_SYMBOL_GPL(acpi_os_unmap_memory); |
1da177e4 | 428 | |
0d3a9cf5 | 429 | void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size) |
7d97277b YL |
430 | { |
431 | if (!acpi_gbl_permanent_mmap) | |
432 | __acpi_unmap_table(virt, size); | |
433 | } | |
434 | ||
6f68c91c | 435 | int acpi_os_map_generic_address(struct acpi_generic_address *gas) |
29718521 | 436 | { |
bc9ffce2 | 437 | u64 addr; |
29718521 MS |
438 | void __iomem *virt; |
439 | ||
bc9ffce2 | 440 | if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) |
29718521 MS |
441 | return 0; |
442 | ||
bc9ffce2 MS |
443 | /* Handle possible alignment issues */ |
444 | memcpy(&addr, &gas->address, sizeof(addr)); | |
445 | if (!addr || !gas->bit_width) | |
29718521 MS |
446 | return -EINVAL; |
447 | ||
a238317c | 448 | virt = acpi_os_map_iomem(addr, gas->bit_width / 8); |
29718521 MS |
449 | if (!virt) |
450 | return -EIO; | |
451 | ||
452 | return 0; | |
453 | } | |
6f68c91c | 454 | EXPORT_SYMBOL(acpi_os_map_generic_address); |
29718521 | 455 | |
6f68c91c | 456 | void acpi_os_unmap_generic_address(struct acpi_generic_address *gas) |
29718521 | 457 | { |
bc9ffce2 | 458 | u64 addr; |
7fe135dc | 459 | struct acpi_ioremap *map; |
29718521 | 460 | |
bc9ffce2 | 461 | if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) |
29718521 MS |
462 | return; |
463 | ||
bc9ffce2 MS |
464 | /* Handle possible alignment issues */ |
465 | memcpy(&addr, &gas->address, sizeof(addr)); | |
466 | if (!addr || !gas->bit_width) | |
29718521 MS |
467 | return; |
468 | ||
7bbb8903 | 469 | mutex_lock(&acpi_ioremap_lock); |
bc9ffce2 | 470 | map = acpi_map_lookup(addr, gas->bit_width / 8); |
7fe135dc RW |
471 | if (!map) { |
472 | mutex_unlock(&acpi_ioremap_lock); | |
473 | return; | |
474 | } | |
b7c1fadd | 475 | acpi_os_drop_map_ref(map); |
7bbb8903 | 476 | mutex_unlock(&acpi_ioremap_lock); |
29718521 | 477 | |
b7c1fadd | 478 | acpi_os_map_cleanup(map); |
29718521 | 479 | } |
6f68c91c | 480 | EXPORT_SYMBOL(acpi_os_unmap_generic_address); |
29718521 | 481 | |
1da177e4 LT |
482 | #ifdef ACPI_FUTURE_USAGE |
483 | acpi_status | |
4be44fcd | 484 | acpi_os_get_physical_address(void *virt, acpi_physical_address * phys) |
1da177e4 | 485 | { |
4be44fcd | 486 | if (!phys || !virt) |
1da177e4 LT |
487 | return AE_BAD_PARAMETER; |
488 | ||
489 | *phys = virt_to_phys(virt); | |
490 | ||
491 | return AE_OK; | |
492 | } | |
493 | #endif | |
494 | ||
18d78b64 RW |
495 | #ifdef CONFIG_ACPI_REV_OVERRIDE_POSSIBLE |
496 | static bool acpi_rev_override; | |
497 | ||
498 | int __init acpi_rev_override_setup(char *str) | |
499 | { | |
500 | acpi_rev_override = true; | |
501 | return 1; | |
502 | } | |
503 | __setup("acpi_rev_override", acpi_rev_override_setup); | |
504 | #else | |
505 | #define acpi_rev_override false | |
506 | #endif | |
507 | ||
1da177e4 LT |
508 | #define ACPI_MAX_OVERRIDE_LEN 100 |
509 | ||
510 | static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN]; | |
511 | ||
512 | acpi_status | |
4be44fcd | 513 | acpi_os_predefined_override(const struct acpi_predefined_names *init_val, |
80b28810 | 514 | acpi_string *new_val) |
1da177e4 LT |
515 | { |
516 | if (!init_val || !new_val) | |
517 | return AE_BAD_PARAMETER; | |
518 | ||
519 | *new_val = NULL; | |
4be44fcd | 520 | if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) { |
1da177e4 | 521 | printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n", |
4be44fcd | 522 | acpi_os_name); |
1da177e4 LT |
523 | *new_val = acpi_os_name; |
524 | } | |
525 | ||
18d78b64 RW |
526 | if (!memcmp(init_val->name, "_REV", 4) && acpi_rev_override) { |
527 | printk(KERN_INFO PREFIX "Overriding _REV return value to 5\n"); | |
528 | *new_val = (char *)5; | |
529 | } | |
530 | ||
1da177e4 LT |
531 | return AE_OK; |
532 | } | |
533 | ||
7d12e780 | 534 | static irqreturn_t acpi_irq(int irq, void *dev_id) |
1da177e4 | 535 | { |
5229e87d LB |
536 | u32 handled; |
537 | ||
538 | handled = (*acpi_irq_handler) (acpi_irq_context); | |
539 | ||
540 | if (handled) { | |
541 | acpi_irq_handled++; | |
542 | return IRQ_HANDLED; | |
88bea188 LB |
543 | } else { |
544 | acpi_irq_not_handled++; | |
5229e87d | 545 | return IRQ_NONE; |
88bea188 | 546 | } |
1da177e4 LT |
547 | } |
548 | ||
549 | acpi_status | |
4be44fcd LB |
550 | acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler, |
551 | void *context) | |
1da177e4 LT |
552 | { |
553 | unsigned int irq; | |
554 | ||
5229e87d LB |
555 | acpi_irq_stats_init(); |
556 | ||
1da177e4 | 557 | /* |
23fe3630 RW |
558 | * ACPI interrupts different from the SCI in our copy of the FADT are |
559 | * not supported. | |
1da177e4 | 560 | */ |
23fe3630 RW |
561 | if (gsi != acpi_gbl_FADT.sci_interrupt) |
562 | return AE_BAD_PARAMETER; | |
563 | ||
564 | if (acpi_irq_handler) | |
565 | return AE_ALREADY_ACQUIRED; | |
566 | ||
1da177e4 LT |
567 | if (acpi_gsi_to_irq(gsi, &irq) < 0) { |
568 | printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n", | |
569 | gsi); | |
570 | return AE_OK; | |
571 | } | |
572 | ||
573 | acpi_irq_handler = handler; | |
574 | acpi_irq_context = context; | |
a8d46b9e | 575 | if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) { |
1da177e4 | 576 | printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq); |
23fe3630 | 577 | acpi_irq_handler = NULL; |
1da177e4 LT |
578 | return AE_NOT_ACQUIRED; |
579 | } | |
49e4b843 | 580 | acpi_sci_irq = irq; |
1da177e4 LT |
581 | |
582 | return AE_OK; | |
583 | } | |
584 | ||
49e4b843 | 585 | acpi_status acpi_os_remove_interrupt_handler(u32 gsi, acpi_osd_handler handler) |
1da177e4 | 586 | { |
49e4b843 | 587 | if (gsi != acpi_gbl_FADT.sci_interrupt || !acpi_sci_irq_valid()) |
23fe3630 RW |
588 | return AE_BAD_PARAMETER; |
589 | ||
49e4b843 | 590 | free_irq(acpi_sci_irq, acpi_irq); |
23fe3630 | 591 | acpi_irq_handler = NULL; |
49e4b843 | 592 | acpi_sci_irq = INVALID_ACPI_IRQ; |
1da177e4 LT |
593 | |
594 | return AE_OK; | |
595 | } | |
596 | ||
597 | /* | |
598 | * Running in interpreter thread context, safe to sleep | |
599 | */ | |
600 | ||
439913ff | 601 | void acpi_os_sleep(u64 ms) |
1da177e4 | 602 | { |
30282299 | 603 | msleep(ms); |
1da177e4 | 604 | } |
4be44fcd | 605 | |
4be44fcd | 606 | void acpi_os_stall(u32 us) |
1da177e4 LT |
607 | { |
608 | while (us) { | |
609 | u32 delay = 1000; | |
610 | ||
611 | if (delay > us) | |
612 | delay = us; | |
613 | udelay(delay); | |
614 | touch_nmi_watchdog(); | |
615 | us -= delay; | |
616 | } | |
617 | } | |
4be44fcd | 618 | |
1da177e4 LT |
619 | /* |
620 | * Support ACPI 3.0 AML Timer operand | |
621 | * Returns 64-bit free-running, monotonically increasing timer | |
622 | * with 100ns granularity | |
623 | */ | |
4be44fcd | 624 | u64 acpi_os_get_timer(void) |
1da177e4 | 625 | { |
10619066 MW |
626 | u64 time_ns = ktime_to_ns(ktime_get()); |
627 | do_div(time_ns, 100); | |
628 | return time_ns; | |
1da177e4 LT |
629 | } |
630 | ||
4be44fcd | 631 | acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width) |
1da177e4 LT |
632 | { |
633 | u32 dummy; | |
634 | ||
635 | if (!value) | |
636 | value = &dummy; | |
637 | ||
49fbabf5 ZY |
638 | *value = 0; |
639 | if (width <= 8) { | |
4be44fcd | 640 | *(u8 *) value = inb(port); |
49fbabf5 | 641 | } else if (width <= 16) { |
4be44fcd | 642 | *(u16 *) value = inw(port); |
49fbabf5 | 643 | } else if (width <= 32) { |
4be44fcd | 644 | *(u32 *) value = inl(port); |
49fbabf5 | 645 | } else { |
1da177e4 LT |
646 | BUG(); |
647 | } | |
648 | ||
649 | return AE_OK; | |
650 | } | |
4be44fcd | 651 | |
1da177e4 LT |
652 | EXPORT_SYMBOL(acpi_os_read_port); |
653 | ||
4be44fcd | 654 | acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width) |
1da177e4 | 655 | { |
49fbabf5 | 656 | if (width <= 8) { |
1da177e4 | 657 | outb(value, port); |
49fbabf5 | 658 | } else if (width <= 16) { |
1da177e4 | 659 | outw(value, port); |
49fbabf5 | 660 | } else if (width <= 32) { |
1da177e4 | 661 | outl(value, port); |
49fbabf5 | 662 | } else { |
1da177e4 LT |
663 | BUG(); |
664 | } | |
665 | ||
666 | return AE_OK; | |
667 | } | |
4be44fcd | 668 | |
1da177e4 LT |
669 | EXPORT_SYMBOL(acpi_os_write_port); |
670 | ||
e615bf5b | 671 | acpi_status |
653f4b53 | 672 | acpi_os_read_memory(acpi_physical_address phys_addr, u64 *value, u32 width) |
e615bf5b MS |
673 | { |
674 | void __iomem *virt_addr; | |
675 | unsigned int size = width / 8; | |
676 | bool unmap = false; | |
677 | u64 dummy; | |
678 | ||
679 | rcu_read_lock(); | |
680 | virt_addr = acpi_map_vaddr_lookup(phys_addr, size); | |
681 | if (!virt_addr) { | |
682 | rcu_read_unlock(); | |
683 | virt_addr = acpi_os_ioremap(phys_addr, size); | |
684 | if (!virt_addr) | |
685 | return AE_BAD_ADDRESS; | |
686 | unmap = true; | |
687 | } | |
688 | ||
689 | if (!value) | |
690 | value = &dummy; | |
691 | ||
692 | switch (width) { | |
693 | case 8: | |
694 | *(u8 *) value = readb(virt_addr); | |
695 | break; | |
696 | case 16: | |
697 | *(u16 *) value = readw(virt_addr); | |
698 | break; | |
699 | case 32: | |
700 | *(u32 *) value = readl(virt_addr); | |
701 | break; | |
702 | case 64: | |
3277b4ea | 703 | *(u64 *) value = readq(virt_addr); |
e615bf5b MS |
704 | break; |
705 | default: | |
706 | BUG(); | |
707 | } | |
708 | ||
709 | if (unmap) | |
710 | iounmap(virt_addr); | |
711 | else | |
712 | rcu_read_unlock(); | |
713 | ||
714 | return AE_OK; | |
715 | } | |
716 | ||
e615bf5b | 717 | acpi_status |
653f4b53 | 718 | acpi_os_write_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 | ||
724 | rcu_read_lock(); | |
725 | virt_addr = acpi_map_vaddr_lookup(phys_addr, size); | |
726 | if (!virt_addr) { | |
727 | rcu_read_unlock(); | |
728 | virt_addr = acpi_os_ioremap(phys_addr, size); | |
729 | if (!virt_addr) | |
730 | return AE_BAD_ADDRESS; | |
731 | unmap = true; | |
732 | } | |
733 | ||
734 | switch (width) { | |
735 | case 8: | |
736 | writeb(value, virt_addr); | |
737 | break; | |
738 | case 16: | |
739 | writew(value, virt_addr); | |
740 | break; | |
741 | case 32: | |
742 | writel(value, virt_addr); | |
743 | break; | |
744 | case 64: | |
3277b4ea | 745 | writeq(value, virt_addr); |
e615bf5b MS |
746 | break; |
747 | default: | |
748 | BUG(); | |
749 | } | |
750 | ||
751 | if (unmap) | |
752 | iounmap(virt_addr); | |
753 | else | |
754 | rcu_read_unlock(); | |
755 | ||
756 | return AE_OK; | |
757 | } | |
758 | ||
1da177e4 | 759 | acpi_status |
4be44fcd | 760 | acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
c5f0231e | 761 | u64 *value, u32 width) |
1da177e4 LT |
762 | { |
763 | int result, size; | |
c5f0231e | 764 | u32 value32; |
1da177e4 LT |
765 | |
766 | if (!value) | |
767 | return AE_BAD_PARAMETER; | |
768 | ||
769 | switch (width) { | |
770 | case 8: | |
771 | size = 1; | |
772 | break; | |
773 | case 16: | |
774 | size = 2; | |
775 | break; | |
776 | case 32: | |
777 | size = 4; | |
778 | break; | |
779 | default: | |
780 | return AE_ERROR; | |
781 | } | |
782 | ||
b6ce068a MW |
783 | result = raw_pci_read(pci_id->segment, pci_id->bus, |
784 | PCI_DEVFN(pci_id->device, pci_id->function), | |
c5f0231e BM |
785 | reg, size, &value32); |
786 | *value = value32; | |
1da177e4 LT |
787 | |
788 | return (result ? AE_ERROR : AE_OK); | |
789 | } | |
4be44fcd | 790 | |
1da177e4 | 791 | acpi_status |
4be44fcd | 792 | acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
439913ff | 793 | u64 value, u32 width) |
1da177e4 LT |
794 | { |
795 | int result, size; | |
796 | ||
797 | switch (width) { | |
798 | case 8: | |
799 | size = 1; | |
800 | break; | |
801 | case 16: | |
802 | size = 2; | |
803 | break; | |
804 | case 32: | |
805 | size = 4; | |
806 | break; | |
807 | default: | |
808 | return AE_ERROR; | |
809 | } | |
810 | ||
b6ce068a MW |
811 | result = raw_pci_write(pci_id->segment, pci_id->bus, |
812 | PCI_DEVFN(pci_id->device, pci_id->function), | |
813 | reg, size, value); | |
1da177e4 LT |
814 | |
815 | return (result ? AE_ERROR : AE_OK); | |
816 | } | |
817 | ||
65f27f38 | 818 | static void acpi_os_execute_deferred(struct work_struct *work) |
88db5e14 AS |
819 | { |
820 | struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work); | |
88db5e14 | 821 | |
19cd847a ZR |
822 | dpc->function(dpc->context); |
823 | kfree(dpc); | |
19cd847a ZR |
824 | } |
825 | ||
836d0830 LZ |
826 | #ifdef CONFIG_ACPI_DEBUGGER |
827 | static struct acpi_debugger acpi_debugger; | |
828 | static bool acpi_debugger_initialized; | |
829 | ||
830 | int acpi_register_debugger(struct module *owner, | |
831 | const struct acpi_debugger_ops *ops) | |
832 | { | |
833 | int ret = 0; | |
834 | ||
835 | mutex_lock(&acpi_debugger.lock); | |
836 | if (acpi_debugger.ops) { | |
837 | ret = -EBUSY; | |
838 | goto err_lock; | |
839 | } | |
840 | ||
841 | acpi_debugger.owner = owner; | |
842 | acpi_debugger.ops = ops; | |
843 | ||
844 | err_lock: | |
845 | mutex_unlock(&acpi_debugger.lock); | |
846 | return ret; | |
847 | } | |
848 | EXPORT_SYMBOL(acpi_register_debugger); | |
849 | ||
850 | void acpi_unregister_debugger(const struct acpi_debugger_ops *ops) | |
851 | { | |
852 | mutex_lock(&acpi_debugger.lock); | |
853 | if (ops == acpi_debugger.ops) { | |
854 | acpi_debugger.ops = NULL; | |
855 | acpi_debugger.owner = NULL; | |
856 | } | |
857 | mutex_unlock(&acpi_debugger.lock); | |
858 | } | |
859 | EXPORT_SYMBOL(acpi_unregister_debugger); | |
860 | ||
861 | int acpi_debugger_create_thread(acpi_osd_exec_callback function, void *context) | |
862 | { | |
863 | int ret; | |
864 | int (*func)(acpi_osd_exec_callback, void *); | |
865 | struct module *owner; | |
866 | ||
867 | if (!acpi_debugger_initialized) | |
868 | return -ENODEV; | |
869 | mutex_lock(&acpi_debugger.lock); | |
870 | if (!acpi_debugger.ops) { | |
871 | ret = -ENODEV; | |
872 | goto err_lock; | |
873 | } | |
874 | if (!try_module_get(acpi_debugger.owner)) { | |
875 | ret = -ENODEV; | |
876 | goto err_lock; | |
877 | } | |
878 | func = acpi_debugger.ops->create_thread; | |
879 | owner = acpi_debugger.owner; | |
880 | mutex_unlock(&acpi_debugger.lock); | |
881 | ||
882 | ret = func(function, context); | |
883 | ||
884 | mutex_lock(&acpi_debugger.lock); | |
885 | module_put(owner); | |
886 | err_lock: | |
887 | mutex_unlock(&acpi_debugger.lock); | |
888 | return ret; | |
889 | } | |
890 | ||
891 | ssize_t acpi_debugger_write_log(const char *msg) | |
892 | { | |
893 | ssize_t ret; | |
894 | ssize_t (*func)(const char *); | |
895 | struct module *owner; | |
896 | ||
897 | if (!acpi_debugger_initialized) | |
898 | return -ENODEV; | |
899 | mutex_lock(&acpi_debugger.lock); | |
900 | if (!acpi_debugger.ops) { | |
901 | ret = -ENODEV; | |
902 | goto err_lock; | |
903 | } | |
904 | if (!try_module_get(acpi_debugger.owner)) { | |
905 | ret = -ENODEV; | |
906 | goto err_lock; | |
907 | } | |
908 | func = acpi_debugger.ops->write_log; | |
909 | owner = acpi_debugger.owner; | |
910 | mutex_unlock(&acpi_debugger.lock); | |
911 | ||
912 | ret = func(msg); | |
913 | ||
914 | mutex_lock(&acpi_debugger.lock); | |
915 | module_put(owner); | |
916 | err_lock: | |
917 | mutex_unlock(&acpi_debugger.lock); | |
918 | return ret; | |
919 | } | |
920 | ||
921 | ssize_t acpi_debugger_read_cmd(char *buffer, size_t buffer_length) | |
922 | { | |
923 | ssize_t ret; | |
924 | ssize_t (*func)(char *, size_t); | |
925 | struct module *owner; | |
926 | ||
927 | if (!acpi_debugger_initialized) | |
928 | return -ENODEV; | |
929 | mutex_lock(&acpi_debugger.lock); | |
930 | if (!acpi_debugger.ops) { | |
931 | ret = -ENODEV; | |
932 | goto err_lock; | |
933 | } | |
934 | if (!try_module_get(acpi_debugger.owner)) { | |
935 | ret = -ENODEV; | |
936 | goto err_lock; | |
937 | } | |
938 | func = acpi_debugger.ops->read_cmd; | |
939 | owner = acpi_debugger.owner; | |
940 | mutex_unlock(&acpi_debugger.lock); | |
941 | ||
942 | ret = func(buffer, buffer_length); | |
943 | ||
944 | mutex_lock(&acpi_debugger.lock); | |
945 | module_put(owner); | |
946 | err_lock: | |
947 | mutex_unlock(&acpi_debugger.lock); | |
948 | return ret; | |
949 | } | |
950 | ||
951 | int acpi_debugger_wait_command_ready(void) | |
952 | { | |
953 | int ret; | |
954 | int (*func)(bool, char *, size_t); | |
955 | struct module *owner; | |
956 | ||
957 | if (!acpi_debugger_initialized) | |
958 | return -ENODEV; | |
959 | mutex_lock(&acpi_debugger.lock); | |
960 | if (!acpi_debugger.ops) { | |
961 | ret = -ENODEV; | |
962 | goto err_lock; | |
963 | } | |
964 | if (!try_module_get(acpi_debugger.owner)) { | |
965 | ret = -ENODEV; | |
966 | goto err_lock; | |
967 | } | |
968 | func = acpi_debugger.ops->wait_command_ready; | |
969 | owner = acpi_debugger.owner; | |
970 | mutex_unlock(&acpi_debugger.lock); | |
971 | ||
972 | ret = func(acpi_gbl_method_executing, | |
973 | acpi_gbl_db_line_buf, ACPI_DB_LINE_BUFFER_SIZE); | |
974 | ||
975 | mutex_lock(&acpi_debugger.lock); | |
976 | module_put(owner); | |
977 | err_lock: | |
978 | mutex_unlock(&acpi_debugger.lock); | |
979 | return ret; | |
980 | } | |
981 | ||
982 | int acpi_debugger_notify_command_complete(void) | |
983 | { | |
984 | int ret; | |
985 | int (*func)(void); | |
986 | struct module *owner; | |
987 | ||
988 | if (!acpi_debugger_initialized) | |
989 | return -ENODEV; | |
990 | mutex_lock(&acpi_debugger.lock); | |
991 | if (!acpi_debugger.ops) { | |
992 | ret = -ENODEV; | |
993 | goto err_lock; | |
994 | } | |
995 | if (!try_module_get(acpi_debugger.owner)) { | |
996 | ret = -ENODEV; | |
997 | goto err_lock; | |
998 | } | |
999 | func = acpi_debugger.ops->notify_command_complete; | |
1000 | owner = acpi_debugger.owner; | |
1001 | mutex_unlock(&acpi_debugger.lock); | |
1002 | ||
1003 | ret = func(); | |
1004 | ||
1005 | mutex_lock(&acpi_debugger.lock); | |
1006 | module_put(owner); | |
1007 | err_lock: | |
1008 | mutex_unlock(&acpi_debugger.lock); | |
1009 | return ret; | |
1010 | } | |
1011 | ||
1012 | int __init acpi_debugger_init(void) | |
1013 | { | |
1014 | mutex_init(&acpi_debugger.lock); | |
1015 | acpi_debugger_initialized = true; | |
1016 | return 0; | |
1017 | } | |
1018 | #endif | |
1019 | ||
b8d35192 AS |
1020 | /******************************************************************************* |
1021 | * | |
1022 | * FUNCTION: acpi_os_execute | |
1023 | * | |
1024 | * PARAMETERS: Type - Type of the callback | |
1025 | * Function - Function to be executed | |
1026 | * Context - Function parameters | |
1027 | * | |
1028 | * RETURN: Status | |
1029 | * | |
1030 | * DESCRIPTION: Depending on type, either queues function for deferred execution or | |
1031 | * immediately executes function on a separate thread. | |
1032 | * | |
1033 | ******************************************************************************/ | |
1034 | ||
7b98118a RW |
1035 | acpi_status acpi_os_execute(acpi_execute_type type, |
1036 | acpi_osd_exec_callback function, void *context) | |
1da177e4 | 1037 | { |
4be44fcd LB |
1038 | acpi_status status = AE_OK; |
1039 | struct acpi_os_dpc *dpc; | |
17bc54ee | 1040 | struct workqueue_struct *queue; |
19cd847a | 1041 | int ret; |
72945b2b LB |
1042 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
1043 | "Scheduling function [%p(%p)] for deferred execution.\n", | |
1044 | function, context)); | |
1da177e4 | 1045 | |
8cfb0cdf | 1046 | if (type == OSL_DEBUGGER_MAIN_THREAD) { |
836d0830 | 1047 | ret = acpi_debugger_create_thread(function, context); |
8cfb0cdf LZ |
1048 | if (ret) { |
1049 | pr_err("Call to kthread_create() failed.\n"); | |
1050 | status = AE_ERROR; | |
1051 | } | |
1052 | goto out_thread; | |
1053 | } | |
1054 | ||
1da177e4 LT |
1055 | /* |
1056 | * Allocate/initialize DPC structure. Note that this memory will be | |
65f27f38 | 1057 | * freed by the callee. The kernel handles the work_struct list in a |
1da177e4 LT |
1058 | * way that allows us to also free its memory inside the callee. |
1059 | * Because we may want to schedule several tasks with different | |
1060 | * parameters we can't use the approach some kernel code uses of | |
65f27f38 | 1061 | * having a static work_struct. |
1da177e4 | 1062 | */ |
72945b2b | 1063 | |
3ae45a27 | 1064 | dpc = kzalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC); |
1da177e4 | 1065 | if (!dpc) |
889c78be | 1066 | return AE_NO_MEMORY; |
b976fe19 | 1067 | |
1da177e4 LT |
1068 | dpc->function = function; |
1069 | dpc->context = context; | |
b976fe19 | 1070 | |
c02256be | 1071 | /* |
3ae45a27 RW |
1072 | * To prevent lockdep from complaining unnecessarily, make sure that |
1073 | * there is a different static lockdep key for each workqueue by using | |
1074 | * INIT_WORK() for each of them separately. | |
c02256be | 1075 | */ |
7b98118a | 1076 | if (type == OSL_NOTIFY_HANDLER) { |
3ae45a27 | 1077 | queue = kacpi_notify_wq; |
bc73675b | 1078 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); |
8cfb0cdf | 1079 | } else if (type == OSL_GPE_HANDLER) { |
3ae45a27 | 1080 | queue = kacpid_wq; |
bc73675b | 1081 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); |
8cfb0cdf LZ |
1082 | } else { |
1083 | pr_err("Unsupported os_execute type %d.\n", type); | |
1084 | status = AE_ERROR; | |
3ae45a27 | 1085 | } |
bc73675b | 1086 | |
8cfb0cdf LZ |
1087 | if (ACPI_FAILURE(status)) |
1088 | goto err_workqueue; | |
1089 | ||
8fec62b2 TH |
1090 | /* |
1091 | * On some machines, a software-initiated SMI causes corruption unless | |
1092 | * the SMI runs on CPU 0. An SMI can be initiated by any AML, but | |
1093 | * typically it's done in GPE-related methods that are run via | |
1094 | * workqueues, so we can avoid the known corruption cases by always | |
1095 | * queueing on CPU 0. | |
1096 | */ | |
1097 | ret = queue_work_on(0, queue, &dpc->work); | |
19cd847a | 1098 | if (!ret) { |
55ac9a01 LM |
1099 | printk(KERN_ERR PREFIX |
1100 | "Call to queue_work() failed.\n"); | |
17bc54ee | 1101 | status = AE_ERROR; |
1da177e4 | 1102 | } |
8cfb0cdf LZ |
1103 | err_workqueue: |
1104 | if (ACPI_FAILURE(status)) | |
1105 | kfree(dpc); | |
1106 | out_thread: | |
889c78be | 1107 | return status; |
1da177e4 | 1108 | } |
7b98118a | 1109 | EXPORT_SYMBOL(acpi_os_execute); |
4be44fcd | 1110 | |
7b98118a | 1111 | void acpi_os_wait_events_complete(void) |
19cd847a | 1112 | { |
90253a79 LZ |
1113 | /* |
1114 | * Make sure the GPE handler or the fixed event handler is not used | |
1115 | * on another CPU after removal. | |
1116 | */ | |
efb1cf7d CY |
1117 | if (acpi_sci_irq_valid()) |
1118 | synchronize_hardirq(acpi_sci_irq); | |
7b98118a RW |
1119 | flush_workqueue(kacpid_wq); |
1120 | flush_workqueue(kacpi_notify_wq); | |
19cd847a | 1121 | } |
1da177e4 | 1122 | |
7b98118a RW |
1123 | struct acpi_hp_work { |
1124 | struct work_struct work; | |
1e3bcb59 | 1125 | struct acpi_device *adev; |
7b98118a RW |
1126 | u32 src; |
1127 | }; | |
1128 | ||
1129 | static void acpi_hotplug_work_fn(struct work_struct *work) | |
19cd847a | 1130 | { |
7b98118a RW |
1131 | struct acpi_hp_work *hpw = container_of(work, struct acpi_hp_work, work); |
1132 | ||
1133 | acpi_os_wait_events_complete(); | |
1e3bcb59 | 1134 | acpi_device_hotplug(hpw->adev, hpw->src); |
7b98118a | 1135 | kfree(hpw); |
19cd847a ZR |
1136 | } |
1137 | ||
1e3bcb59 | 1138 | acpi_status acpi_hotplug_schedule(struct acpi_device *adev, u32 src) |
1da177e4 | 1139 | { |
7b98118a RW |
1140 | struct acpi_hp_work *hpw; |
1141 | ||
1142 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, | |
1e3bcb59 RW |
1143 | "Scheduling hotplug event (%p, %u) for deferred execution.\n", |
1144 | adev, src)); | |
7b98118a RW |
1145 | |
1146 | hpw = kmalloc(sizeof(*hpw), GFP_KERNEL); | |
1147 | if (!hpw) | |
1148 | return AE_NO_MEMORY; | |
1149 | ||
1150 | INIT_WORK(&hpw->work, acpi_hotplug_work_fn); | |
1e3bcb59 | 1151 | hpw->adev = adev; |
7b98118a RW |
1152 | hpw->src = src; |
1153 | /* | |
1154 | * We can't run hotplug code in kacpid_wq/kacpid_notify_wq etc., because | |
1155 | * the hotplug code may call driver .remove() functions, which may | |
1156 | * invoke flush_scheduled_work()/acpi_os_wait_events_complete() to flush | |
1157 | * these workqueues. | |
1158 | */ | |
1159 | if (!queue_work(kacpi_hotplug_wq, &hpw->work)) { | |
1160 | kfree(hpw); | |
1161 | return AE_ERROR; | |
1162 | } | |
1163 | return AE_OK; | |
1da177e4 | 1164 | } |
4be44fcd | 1165 | |
d783156e RW |
1166 | bool acpi_queue_hotplug_work(struct work_struct *work) |
1167 | { | |
1168 | return queue_work(kacpi_hotplug_wq, work); | |
1169 | } | |
1da177e4 | 1170 | |
1da177e4 | 1171 | acpi_status |
4be44fcd | 1172 | acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle) |
1da177e4 | 1173 | { |
4be44fcd | 1174 | struct semaphore *sem = NULL; |
1da177e4 | 1175 | |
2d0acb4a | 1176 | sem = acpi_os_allocate_zeroed(sizeof(struct semaphore)); |
1da177e4 | 1177 | if (!sem) |
d550d98d | 1178 | return AE_NO_MEMORY; |
1da177e4 LT |
1179 | |
1180 | sema_init(sem, initial_units); | |
1181 | ||
4be44fcd | 1182 | *handle = (acpi_handle *) sem; |
1da177e4 | 1183 | |
4be44fcd LB |
1184 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n", |
1185 | *handle, initial_units)); | |
1da177e4 | 1186 | |
d550d98d | 1187 | return AE_OK; |
1da177e4 | 1188 | } |
1da177e4 | 1189 | |
1da177e4 LT |
1190 | /* |
1191 | * TODO: A better way to delete semaphores? Linux doesn't have a | |
1192 | * 'delete_semaphore()' function -- may result in an invalid | |
1193 | * pointer dereference for non-synchronized consumers. Should | |
1194 | * we at least check for blocked threads and signal/cancel them? | |
1195 | */ | |
1196 | ||
4be44fcd | 1197 | acpi_status acpi_os_delete_semaphore(acpi_handle handle) |
1da177e4 | 1198 | { |
4be44fcd | 1199 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 1200 | |
1da177e4 | 1201 | if (!sem) |
d550d98d | 1202 | return AE_BAD_PARAMETER; |
1da177e4 | 1203 | |
4be44fcd | 1204 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle)); |
1da177e4 | 1205 | |
f1241c87 | 1206 | BUG_ON(!list_empty(&sem->wait_list)); |
02438d87 | 1207 | kfree(sem); |
4be44fcd | 1208 | sem = NULL; |
1da177e4 | 1209 | |
d550d98d | 1210 | return AE_OK; |
1da177e4 | 1211 | } |
1da177e4 | 1212 | |
1da177e4 | 1213 | /* |
1da177e4 LT |
1214 | * TODO: Support for units > 1? |
1215 | */ | |
4be44fcd | 1216 | acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout) |
1da177e4 | 1217 | { |
4be44fcd LB |
1218 | acpi_status status = AE_OK; |
1219 | struct semaphore *sem = (struct semaphore *)handle; | |
f1241c87 | 1220 | long jiffies; |
4be44fcd | 1221 | int ret = 0; |
1da177e4 | 1222 | |
7901a052 LZ |
1223 | if (!acpi_os_initialized) |
1224 | return AE_OK; | |
1225 | ||
1da177e4 | 1226 | if (!sem || (units < 1)) |
d550d98d | 1227 | return AE_BAD_PARAMETER; |
1da177e4 LT |
1228 | |
1229 | if (units > 1) | |
d550d98d | 1230 | return AE_SUPPORT; |
1da177e4 | 1231 | |
4be44fcd LB |
1232 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n", |
1233 | handle, units, timeout)); | |
1da177e4 | 1234 | |
f1241c87 MW |
1235 | if (timeout == ACPI_WAIT_FOREVER) |
1236 | jiffies = MAX_SCHEDULE_TIMEOUT; | |
1237 | else | |
1238 | jiffies = msecs_to_jiffies(timeout); | |
cad1525a | 1239 | |
f1241c87 MW |
1240 | ret = down_timeout(sem, jiffies); |
1241 | if (ret) | |
1242 | status = AE_TIME; | |
1da177e4 LT |
1243 | |
1244 | if (ACPI_FAILURE(status)) { | |
9e7e2c04 | 1245 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, |
a6fc6720 | 1246 | "Failed to acquire semaphore[%p|%d|%d], %s", |
4be44fcd LB |
1247 | handle, units, timeout, |
1248 | acpi_format_exception(status))); | |
1249 | } else { | |
1250 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, | |
a6fc6720 | 1251 | "Acquired semaphore[%p|%d|%d]", handle, |
4be44fcd | 1252 | units, timeout)); |
1da177e4 LT |
1253 | } |
1254 | ||
d550d98d | 1255 | return status; |
1da177e4 | 1256 | } |
1da177e4 | 1257 | |
1da177e4 LT |
1258 | /* |
1259 | * TODO: Support for units > 1? | |
1260 | */ | |
4be44fcd | 1261 | acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units) |
1da177e4 | 1262 | { |
4be44fcd | 1263 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 1264 | |
7901a052 LZ |
1265 | if (!acpi_os_initialized) |
1266 | return AE_OK; | |
1267 | ||
1da177e4 | 1268 | if (!sem || (units < 1)) |
d550d98d | 1269 | return AE_BAD_PARAMETER; |
1da177e4 LT |
1270 | |
1271 | if (units > 1) | |
d550d98d | 1272 | return AE_SUPPORT; |
1da177e4 | 1273 | |
4be44fcd LB |
1274 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle, |
1275 | units)); | |
1da177e4 LT |
1276 | |
1277 | up(sem); | |
1278 | ||
d550d98d | 1279 | return AE_OK; |
1da177e4 | 1280 | } |
4be44fcd | 1281 | |
4d946f79 | 1282 | acpi_status acpi_os_get_line(char *buffer, u32 buffer_length, u32 *bytes_read) |
1da177e4 | 1283 | { |
1da177e4 LT |
1284 | #ifdef ENABLE_DEBUGGER |
1285 | if (acpi_in_debugger) { | |
1286 | u32 chars; | |
1287 | ||
4d946f79 | 1288 | kdb_read(buffer, buffer_length); |
1da177e4 LT |
1289 | |
1290 | /* remove the CR kdb includes */ | |
1291 | chars = strlen(buffer) - 1; | |
1292 | buffer[chars] = '\0'; | |
1293 | } | |
8cfb0cdf LZ |
1294 | #else |
1295 | int ret; | |
1296 | ||
836d0830 | 1297 | ret = acpi_debugger_read_cmd(buffer, buffer_length); |
8cfb0cdf LZ |
1298 | if (ret < 0) |
1299 | return AE_ERROR; | |
1300 | if (bytes_read) | |
1301 | *bytes_read = ret; | |
1da177e4 LT |
1302 | #endif |
1303 | ||
4d946f79 | 1304 | return AE_OK; |
1da177e4 | 1305 | } |
836d0830 | 1306 | EXPORT_SYMBOL(acpi_os_get_line); |
1da177e4 | 1307 | |
8cfb0cdf LZ |
1308 | acpi_status acpi_os_wait_command_ready(void) |
1309 | { | |
1310 | int ret; | |
1311 | ||
836d0830 | 1312 | ret = acpi_debugger_wait_command_ready(); |
8cfb0cdf LZ |
1313 | if (ret < 0) |
1314 | return AE_ERROR; | |
1315 | return AE_OK; | |
1316 | } | |
1317 | ||
1318 | acpi_status acpi_os_notify_command_complete(void) | |
1319 | { | |
1320 | int ret; | |
1321 | ||
836d0830 | 1322 | ret = acpi_debugger_notify_command_complete(); |
8cfb0cdf LZ |
1323 | if (ret < 0) |
1324 | return AE_ERROR; | |
1325 | return AE_OK; | |
1326 | } | |
1327 | ||
4be44fcd | 1328 | acpi_status acpi_os_signal(u32 function, void *info) |
1da177e4 | 1329 | { |
4be44fcd | 1330 | switch (function) { |
1da177e4 LT |
1331 | case ACPI_SIGNAL_FATAL: |
1332 | printk(KERN_ERR PREFIX "Fatal opcode executed\n"); | |
1333 | break; | |
1334 | case ACPI_SIGNAL_BREAKPOINT: | |
1335 | /* | |
1336 | * AML Breakpoint | |
1337 | * ACPI spec. says to treat it as a NOP unless | |
1338 | * you are debugging. So if/when we integrate | |
1339 | * AML debugger into the kernel debugger its | |
1340 | * hook will go here. But until then it is | |
1341 | * not useful to print anything on breakpoints. | |
1342 | */ | |
1343 | break; | |
1344 | default: | |
1345 | break; | |
1346 | } | |
1347 | ||
1348 | return AE_OK; | |
1349 | } | |
4be44fcd | 1350 | |
4be44fcd | 1351 | static int __init acpi_os_name_setup(char *str) |
1da177e4 LT |
1352 | { |
1353 | char *p = acpi_os_name; | |
4be44fcd | 1354 | int count = ACPI_MAX_OVERRIDE_LEN - 1; |
1da177e4 LT |
1355 | |
1356 | if (!str || !*str) | |
1357 | return 0; | |
1358 | ||
5e2be4e0 | 1359 | for (; count-- && *str; str++) { |
1da177e4 LT |
1360 | if (isalnum(*str) || *str == ' ' || *str == ':') |
1361 | *p++ = *str; | |
1362 | else if (*str == '\'' || *str == '"') | |
1363 | continue; | |
1364 | else | |
1365 | break; | |
1366 | } | |
1367 | *p = 0; | |
1368 | ||
1369 | return 1; | |
4be44fcd | 1370 | |
1da177e4 LT |
1371 | } |
1372 | ||
1373 | __setup("acpi_os_name=", acpi_os_name_setup); | |
1374 | ||
22b5afce | 1375 | /* |
08e1d7c0 | 1376 | * Disable the auto-serialization of named objects creation methods. |
22b5afce | 1377 | * |
08e1d7c0 | 1378 | * This feature is enabled by default. It marks the AML control methods |
22b5afce BM |
1379 | * that contain the opcodes to create named objects as "Serialized". |
1380 | */ | |
08e1d7c0 | 1381 | static int __init acpi_no_auto_serialize_setup(char *str) |
1da177e4 | 1382 | { |
08e1d7c0 LZ |
1383 | acpi_gbl_auto_serialize_methods = FALSE; |
1384 | pr_info("ACPI: auto-serialization disabled\n"); | |
1da177e4 LT |
1385 | |
1386 | return 1; | |
1387 | } | |
1388 | ||
08e1d7c0 | 1389 | __setup("acpi_no_auto_serialize", acpi_no_auto_serialize_setup); |
1da177e4 | 1390 | |
df92e695 TR |
1391 | /* Check of resource interference between native drivers and ACPI |
1392 | * OperationRegions (SystemIO and System Memory only). | |
1393 | * IO ports and memory declared in ACPI might be used by the ACPI subsystem | |
1394 | * in arbitrary AML code and can interfere with legacy drivers. | |
1395 | * acpi_enforce_resources= can be set to: | |
1396 | * | |
7e90560c | 1397 | * - strict (default) (2) |
df92e695 | 1398 | * -> further driver trying to access the resources will not load |
7e90560c | 1399 | * - lax (1) |
df92e695 TR |
1400 | * -> further driver trying to access the resources will load, but you |
1401 | * get a system message that something might go wrong... | |
1402 | * | |
1403 | * - no (0) | |
1404 | * -> ACPI Operation Region resources will not be registered | |
1405 | * | |
1406 | */ | |
1407 | #define ENFORCE_RESOURCES_STRICT 2 | |
1408 | #define ENFORCE_RESOURCES_LAX 1 | |
1409 | #define ENFORCE_RESOURCES_NO 0 | |
1410 | ||
7e90560c | 1411 | static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; |
df92e695 TR |
1412 | |
1413 | static int __init acpi_enforce_resources_setup(char *str) | |
1414 | { | |
1415 | if (str == NULL || *str == '\0') | |
1416 | return 0; | |
1417 | ||
1418 | if (!strcmp("strict", str)) | |
1419 | acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; | |
1420 | else if (!strcmp("lax", str)) | |
1421 | acpi_enforce_resources = ENFORCE_RESOURCES_LAX; | |
1422 | else if (!strcmp("no", str)) | |
1423 | acpi_enforce_resources = ENFORCE_RESOURCES_NO; | |
1424 | ||
1425 | return 1; | |
1426 | } | |
1427 | ||
1428 | __setup("acpi_enforce_resources=", acpi_enforce_resources_setup); | |
1429 | ||
1430 | /* Check for resource conflicts between ACPI OperationRegions and native | |
1431 | * drivers */ | |
876fba43 | 1432 | int acpi_check_resource_conflict(const struct resource *res) |
df92e695 | 1433 | { |
f654c0fe LM |
1434 | acpi_adr_space_type space_id; |
1435 | acpi_size length; | |
1436 | u8 warn = 0; | |
1437 | int clash = 0; | |
df92e695 TR |
1438 | |
1439 | if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) | |
1440 | return 0; | |
1441 | if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM)) | |
1442 | return 0; | |
1443 | ||
f654c0fe LM |
1444 | if (res->flags & IORESOURCE_IO) |
1445 | space_id = ACPI_ADR_SPACE_SYSTEM_IO; | |
1446 | else | |
1447 | space_id = ACPI_ADR_SPACE_SYSTEM_MEMORY; | |
df92e695 | 1448 | |
e4f52244 | 1449 | length = resource_size(res); |
f654c0fe LM |
1450 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) |
1451 | warn = 1; | |
1452 | clash = acpi_check_address_range(space_id, res->start, length, warn); | |
df92e695 TR |
1453 | |
1454 | if (clash) { | |
1455 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) { | |
14f03343 JD |
1456 | if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX) |
1457 | printk(KERN_NOTICE "ACPI: This conflict may" | |
1458 | " cause random problems and system" | |
1459 | " instability\n"); | |
1460 | printk(KERN_INFO "ACPI: If an ACPI driver is available" | |
1461 | " for this device, you should use it instead of" | |
1462 | " the native driver\n"); | |
df92e695 TR |
1463 | } |
1464 | if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT) | |
1465 | return -EBUSY; | |
1466 | } | |
1467 | return 0; | |
1468 | } | |
443dea72 | 1469 | EXPORT_SYMBOL(acpi_check_resource_conflict); |
df92e695 TR |
1470 | |
1471 | int acpi_check_region(resource_size_t start, resource_size_t n, | |
1472 | const char *name) | |
1473 | { | |
1474 | struct resource res = { | |
1475 | .start = start, | |
1476 | .end = start + n - 1, | |
1477 | .name = name, | |
1478 | .flags = IORESOURCE_IO, | |
1479 | }; | |
1480 | ||
1481 | return acpi_check_resource_conflict(&res); | |
1482 | } | |
1483 | EXPORT_SYMBOL(acpi_check_region); | |
1484 | ||
70dd6bea JD |
1485 | /* |
1486 | * Let drivers know whether the resource checks are effective | |
1487 | */ | |
1488 | int acpi_resources_are_enforced(void) | |
1489 | { | |
1490 | return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT; | |
1491 | } | |
1492 | EXPORT_SYMBOL(acpi_resources_are_enforced); | |
1493 | ||
9f63b88b LM |
1494 | /* |
1495 | * Deallocate the memory for a spinlock. | |
1496 | */ | |
1497 | void acpi_os_delete_lock(acpi_spinlock handle) | |
1498 | { | |
1499 | ACPI_FREE(handle); | |
1500 | } | |
1501 | ||
73459f73 RM |
1502 | /* |
1503 | * Acquire a spinlock. | |
1504 | * | |
1505 | * handle is a pointer to the spinlock_t. | |
73459f73 RM |
1506 | */ |
1507 | ||
967440e3 | 1508 | acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp) |
73459f73 | 1509 | { |
b8e4d893 | 1510 | acpi_cpu_flags flags; |
967440e3 | 1511 | spin_lock_irqsave(lockp, flags); |
73459f73 RM |
1512 | return flags; |
1513 | } | |
1514 | ||
1515 | /* | |
1516 | * Release a spinlock. See above. | |
1517 | */ | |
1518 | ||
967440e3 | 1519 | void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags) |
73459f73 | 1520 | { |
967440e3 | 1521 | spin_unlock_irqrestore(lockp, flags); |
73459f73 RM |
1522 | } |
1523 | ||
73459f73 RM |
1524 | #ifndef ACPI_USE_LOCAL_CACHE |
1525 | ||
1526 | /******************************************************************************* | |
1527 | * | |
1528 | * FUNCTION: acpi_os_create_cache | |
1529 | * | |
b229cf92 BM |
1530 | * PARAMETERS: name - Ascii name for the cache |
1531 | * size - Size of each cached object | |
1532 | * depth - Maximum depth of the cache (in objects) <ignored> | |
1533 | * cache - Where the new cache object is returned | |
73459f73 | 1534 | * |
b229cf92 | 1535 | * RETURN: status |
73459f73 RM |
1536 | * |
1537 | * DESCRIPTION: Create a cache object | |
1538 | * | |
1539 | ******************************************************************************/ | |
1540 | ||
1541 | acpi_status | |
4be44fcd | 1542 | acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache) |
73459f73 | 1543 | { |
20c2df83 | 1544 | *cache = kmem_cache_create(name, size, 0, 0, NULL); |
a6fdbf90 | 1545 | if (*cache == NULL) |
b229cf92 BM |
1546 | return AE_ERROR; |
1547 | else | |
1548 | return AE_OK; | |
73459f73 RM |
1549 | } |
1550 | ||
1551 | /******************************************************************************* | |
1552 | * | |
1553 | * FUNCTION: acpi_os_purge_cache | |
1554 | * | |
1555 | * PARAMETERS: Cache - Handle to cache object | |
1556 | * | |
1557 | * RETURN: Status | |
1558 | * | |
1559 | * DESCRIPTION: Free all objects within the requested cache. | |
1560 | * | |
1561 | ******************************************************************************/ | |
1562 | ||
4be44fcd | 1563 | acpi_status acpi_os_purge_cache(acpi_cache_t * cache) |
73459f73 | 1564 | { |
50dd0969 | 1565 | kmem_cache_shrink(cache); |
4be44fcd | 1566 | return (AE_OK); |
73459f73 RM |
1567 | } |
1568 | ||
1569 | /******************************************************************************* | |
1570 | * | |
1571 | * FUNCTION: acpi_os_delete_cache | |
1572 | * | |
1573 | * PARAMETERS: Cache - Handle to cache object | |
1574 | * | |
1575 | * RETURN: Status | |
1576 | * | |
1577 | * DESCRIPTION: Free all objects within the requested cache and delete the | |
1578 | * cache object. | |
1579 | * | |
1580 | ******************************************************************************/ | |
1581 | ||
4be44fcd | 1582 | acpi_status acpi_os_delete_cache(acpi_cache_t * cache) |
73459f73 | 1583 | { |
1a1d92c1 | 1584 | kmem_cache_destroy(cache); |
4be44fcd | 1585 | return (AE_OK); |
73459f73 RM |
1586 | } |
1587 | ||
1588 | /******************************************************************************* | |
1589 | * | |
1590 | * FUNCTION: acpi_os_release_object | |
1591 | * | |
1592 | * PARAMETERS: Cache - Handle to cache object | |
1593 | * Object - The object to be released | |
1594 | * | |
1595 | * RETURN: None | |
1596 | * | |
1597 | * DESCRIPTION: Release an object to the specified cache. If cache is full, | |
1598 | * the object is deleted. | |
1599 | * | |
1600 | ******************************************************************************/ | |
1601 | ||
4be44fcd | 1602 | acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object) |
73459f73 | 1603 | { |
4be44fcd LB |
1604 | kmem_cache_free(cache, object); |
1605 | return (AE_OK); | |
73459f73 | 1606 | } |
73459f73 | 1607 | #endif |
d362edaf | 1608 | |
a94e88cd | 1609 | static int __init acpi_no_static_ssdt_setup(char *s) |
b75dd297 | 1610 | { |
a94e88cd LZ |
1611 | acpi_gbl_disable_ssdt_table_install = TRUE; |
1612 | pr_info("ACPI: static SSDT installation disabled\n"); | |
b75dd297 | 1613 | |
a94e88cd | 1614 | return 0; |
b75dd297 LZ |
1615 | } |
1616 | ||
a94e88cd | 1617 | early_param("acpi_no_static_ssdt", acpi_no_static_ssdt_setup); |
b75dd297 | 1618 | |
4dde507f LZ |
1619 | static int __init acpi_disable_return_repair(char *s) |
1620 | { | |
1621 | printk(KERN_NOTICE PREFIX | |
1622 | "ACPI: Predefined validation mechanism disabled\n"); | |
1623 | acpi_gbl_disable_auto_repair = TRUE; | |
1624 | ||
1625 | return 1; | |
1626 | } | |
1627 | ||
1628 | __setup("acpica_no_return_repair", acpi_disable_return_repair); | |
1629 | ||
d362edaf MS |
1630 | acpi_status __init acpi_os_initialize(void) |
1631 | { | |
1632 | acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block); | |
1633 | acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block); | |
1634 | acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block); | |
1635 | acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block); | |
a4714a89 RW |
1636 | if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) { |
1637 | /* | |
1638 | * Use acpi_os_map_generic_address to pre-map the reset | |
1639 | * register if it's in system memory. | |
1640 | */ | |
1641 | int rv; | |
1642 | ||
1643 | rv = acpi_os_map_generic_address(&acpi_gbl_FADT.reset_register); | |
1644 | pr_debug(PREFIX "%s: map reset_reg status %d\n", __func__, rv); | |
1645 | } | |
7901a052 | 1646 | acpi_os_initialized = true; |
d362edaf MS |
1647 | |
1648 | return AE_OK; | |
1649 | } | |
1650 | ||
32d47eef | 1651 | acpi_status __init acpi_os_initialize1(void) |
d362edaf | 1652 | { |
44d2588e TH |
1653 | kacpid_wq = alloc_workqueue("kacpid", 0, 1); |
1654 | kacpi_notify_wq = alloc_workqueue("kacpi_notify", 0, 1); | |
d783156e | 1655 | kacpi_hotplug_wq = alloc_ordered_workqueue("kacpi_hotplug", 0); |
d362edaf MS |
1656 | BUG_ON(!kacpid_wq); |
1657 | BUG_ON(!kacpi_notify_wq); | |
1658 | BUG_ON(!kacpi_hotplug_wq); | |
e5f660eb | 1659 | acpi_osi_init(); |
d362edaf MS |
1660 | return AE_OK; |
1661 | } | |
1662 | ||
1663 | acpi_status acpi_os_terminate(void) | |
1664 | { | |
1665 | if (acpi_irq_handler) { | |
23fe3630 | 1666 | acpi_os_remove_interrupt_handler(acpi_gbl_FADT.sci_interrupt, |
d362edaf MS |
1667 | acpi_irq_handler); |
1668 | } | |
1669 | ||
1670 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe1_block); | |
1671 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block); | |
1672 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block); | |
1673 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block); | |
a4714a89 RW |
1674 | if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) |
1675 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.reset_register); | |
d362edaf MS |
1676 | |
1677 | destroy_workqueue(kacpid_wq); | |
1678 | destroy_workqueue(kacpi_notify_wq); | |
1679 | destroy_workqueue(kacpi_hotplug_wq); | |
1680 | ||
1681 | return AE_OK; | |
1682 | } | |
09f98a82 TL |
1683 | |
1684 | acpi_status acpi_os_prepare_sleep(u8 sleep_state, u32 pm1a_control, | |
1685 | u32 pm1b_control) | |
1686 | { | |
1687 | int rc = 0; | |
1688 | if (__acpi_os_prepare_sleep) | |
1689 | rc = __acpi_os_prepare_sleep(sleep_state, | |
1690 | pm1a_control, pm1b_control); | |
1691 | if (rc < 0) | |
1692 | return AE_ERROR; | |
1693 | else if (rc > 0) | |
1694 | return AE_CTRL_SKIP; | |
1695 | ||
1696 | return AE_OK; | |
1697 | } | |
1698 | ||
1699 | void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state, | |
1700 | u32 pm1a_ctrl, u32 pm1b_ctrl)) | |
1701 | { | |
1702 | __acpi_os_prepare_sleep = func; | |
1703 | } | |
92d8aff3 | 1704 | |
d6b47b12 BG |
1705 | acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state, u32 val_a, |
1706 | u32 val_b) | |
1707 | { | |
1708 | int rc = 0; | |
1709 | if (__acpi_os_prepare_extended_sleep) | |
1710 | rc = __acpi_os_prepare_extended_sleep(sleep_state, | |
1711 | val_a, val_b); | |
1712 | if (rc < 0) | |
1713 | return AE_ERROR; | |
1714 | else if (rc > 0) | |
1715 | return AE_CTRL_SKIP; | |
1716 | ||
1717 | return AE_OK; | |
1718 | } | |
1719 | ||
1720 | void acpi_os_set_prepare_extended_sleep(int (*func)(u8 sleep_state, | |
1721 | u32 val_a, u32 val_b)) | |
1722 | { | |
1723 | __acpi_os_prepare_extended_sleep = func; | |
1724 | } |