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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 | */ | |
2fdf0741 | 312 | void __iomem *__init_refok |
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 | ||
365 | void *__init_refok | |
366 | acpi_os_map_memory(acpi_physical_address phys, acpi_size size) | |
367 | { | |
368 | return (void *)acpi_os_map_iomem(phys, size); | |
369 | } | |
55a82ab3 | 370 | EXPORT_SYMBOL_GPL(acpi_os_map_memory); |
1da177e4 | 371 | |
b7c1fadd | 372 | static void acpi_os_drop_map_ref(struct acpi_ioremap *map) |
4a3cba5e | 373 | { |
b7c1fadd RW |
374 | if (!--map->refcount) |
375 | list_del_rcu(&map->list); | |
4a3cba5e | 376 | } |
4a3cba5e | 377 | |
b7c1fadd | 378 | static void acpi_os_map_cleanup(struct acpi_ioremap *map) |
7fe135dc | 379 | { |
b7c1fadd | 380 | if (!map->refcount) { |
74b51ee1 | 381 | synchronize_rcu_expedited(); |
ba242d5b | 382 | acpi_unmap(map->phys, map->virt); |
b7c1fadd RW |
383 | kfree(map); |
384 | } | |
4a3cba5e MS |
385 | } |
386 | ||
9d128ed1 RW |
387 | /** |
388 | * acpi_os_unmap_iomem - Drop a memory mapping reference. | |
389 | * @virt: Start of the address range to drop a reference to. | |
390 | * @size: Size of the address range to drop a reference to. | |
391 | * | |
392 | * Look up the given virtual address range in the list of existing ACPI memory | |
393 | * mappings, drop a reference to it and unmap it if there are no more active | |
394 | * references to it. | |
395 | * | |
396 | * During early init (when acpi_gbl_permanent_mmap has not been set yet) this | |
397 | * routine simply calls __acpi_unmap_table() to get the job done. Since | |
398 | * __acpi_unmap_table() is an __init function, the __ref annotation is needed | |
399 | * here. | |
400 | */ | |
a238317c | 401 | void __ref acpi_os_unmap_iomem(void __iomem *virt, acpi_size size) |
1da177e4 | 402 | { |
620242ae | 403 | struct acpi_ioremap *map; |
620242ae MS |
404 | |
405 | if (!acpi_gbl_permanent_mmap) { | |
7d97277b | 406 | __acpi_unmap_table(virt, size); |
620242ae MS |
407 | return; |
408 | } | |
409 | ||
7bbb8903 | 410 | mutex_lock(&acpi_ioremap_lock); |
620242ae MS |
411 | map = acpi_map_lookup_virt(virt, size); |
412 | if (!map) { | |
7bbb8903 | 413 | mutex_unlock(&acpi_ioremap_lock); |
7fe135dc | 414 | WARN(true, PREFIX "%s: bad address %p\n", __func__, virt); |
620242ae MS |
415 | return; |
416 | } | |
b7c1fadd | 417 | acpi_os_drop_map_ref(map); |
7bbb8903 | 418 | mutex_unlock(&acpi_ioremap_lock); |
620242ae | 419 | |
b7c1fadd | 420 | acpi_os_map_cleanup(map); |
1da177e4 | 421 | } |
a238317c LZ |
422 | EXPORT_SYMBOL_GPL(acpi_os_unmap_iomem); |
423 | ||
424 | void __ref acpi_os_unmap_memory(void *virt, acpi_size size) | |
425 | { | |
426 | return acpi_os_unmap_iomem((void __iomem *)virt, size); | |
427 | } | |
55a82ab3 | 428 | EXPORT_SYMBOL_GPL(acpi_os_unmap_memory); |
1da177e4 | 429 | |
0d3a9cf5 | 430 | void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size) |
7d97277b YL |
431 | { |
432 | if (!acpi_gbl_permanent_mmap) | |
433 | __acpi_unmap_table(virt, size); | |
434 | } | |
435 | ||
6f68c91c | 436 | int acpi_os_map_generic_address(struct acpi_generic_address *gas) |
29718521 | 437 | { |
bc9ffce2 | 438 | u64 addr; |
29718521 MS |
439 | void __iomem *virt; |
440 | ||
bc9ffce2 | 441 | if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) |
29718521 MS |
442 | return 0; |
443 | ||
bc9ffce2 MS |
444 | /* Handle possible alignment issues */ |
445 | memcpy(&addr, &gas->address, sizeof(addr)); | |
446 | if (!addr || !gas->bit_width) | |
29718521 MS |
447 | return -EINVAL; |
448 | ||
a238317c | 449 | virt = acpi_os_map_iomem(addr, gas->bit_width / 8); |
29718521 MS |
450 | if (!virt) |
451 | return -EIO; | |
452 | ||
453 | return 0; | |
454 | } | |
6f68c91c | 455 | EXPORT_SYMBOL(acpi_os_map_generic_address); |
29718521 | 456 | |
6f68c91c | 457 | void acpi_os_unmap_generic_address(struct acpi_generic_address *gas) |
29718521 | 458 | { |
bc9ffce2 | 459 | u64 addr; |
7fe135dc | 460 | struct acpi_ioremap *map; |
29718521 | 461 | |
bc9ffce2 | 462 | if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) |
29718521 MS |
463 | return; |
464 | ||
bc9ffce2 MS |
465 | /* Handle possible alignment issues */ |
466 | memcpy(&addr, &gas->address, sizeof(addr)); | |
467 | if (!addr || !gas->bit_width) | |
29718521 MS |
468 | return; |
469 | ||
7bbb8903 | 470 | mutex_lock(&acpi_ioremap_lock); |
bc9ffce2 | 471 | map = acpi_map_lookup(addr, gas->bit_width / 8); |
7fe135dc RW |
472 | if (!map) { |
473 | mutex_unlock(&acpi_ioremap_lock); | |
474 | return; | |
475 | } | |
b7c1fadd | 476 | acpi_os_drop_map_ref(map); |
7bbb8903 | 477 | mutex_unlock(&acpi_ioremap_lock); |
29718521 | 478 | |
b7c1fadd | 479 | acpi_os_map_cleanup(map); |
29718521 | 480 | } |
6f68c91c | 481 | EXPORT_SYMBOL(acpi_os_unmap_generic_address); |
29718521 | 482 | |
1da177e4 LT |
483 | #ifdef ACPI_FUTURE_USAGE |
484 | acpi_status | |
4be44fcd | 485 | acpi_os_get_physical_address(void *virt, acpi_physical_address * phys) |
1da177e4 | 486 | { |
4be44fcd | 487 | if (!phys || !virt) |
1da177e4 LT |
488 | return AE_BAD_PARAMETER; |
489 | ||
490 | *phys = virt_to_phys(virt); | |
491 | ||
492 | return AE_OK; | |
493 | } | |
494 | #endif | |
495 | ||
18d78b64 RW |
496 | #ifdef CONFIG_ACPI_REV_OVERRIDE_POSSIBLE |
497 | static bool acpi_rev_override; | |
498 | ||
499 | int __init acpi_rev_override_setup(char *str) | |
500 | { | |
501 | acpi_rev_override = true; | |
502 | return 1; | |
503 | } | |
504 | __setup("acpi_rev_override", acpi_rev_override_setup); | |
505 | #else | |
506 | #define acpi_rev_override false | |
507 | #endif | |
508 | ||
1da177e4 LT |
509 | #define ACPI_MAX_OVERRIDE_LEN 100 |
510 | ||
511 | static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN]; | |
512 | ||
513 | acpi_status | |
4be44fcd | 514 | acpi_os_predefined_override(const struct acpi_predefined_names *init_val, |
80b28810 | 515 | acpi_string *new_val) |
1da177e4 LT |
516 | { |
517 | if (!init_val || !new_val) | |
518 | return AE_BAD_PARAMETER; | |
519 | ||
520 | *new_val = NULL; | |
4be44fcd | 521 | if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) { |
1da177e4 | 522 | printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n", |
4be44fcd | 523 | acpi_os_name); |
1da177e4 LT |
524 | *new_val = acpi_os_name; |
525 | } | |
526 | ||
18d78b64 RW |
527 | if (!memcmp(init_val->name, "_REV", 4) && acpi_rev_override) { |
528 | printk(KERN_INFO PREFIX "Overriding _REV return value to 5\n"); | |
529 | *new_val = (char *)5; | |
530 | } | |
531 | ||
1da177e4 LT |
532 | return AE_OK; |
533 | } | |
534 | ||
7d12e780 | 535 | static irqreturn_t acpi_irq(int irq, void *dev_id) |
1da177e4 | 536 | { |
5229e87d LB |
537 | u32 handled; |
538 | ||
539 | handled = (*acpi_irq_handler) (acpi_irq_context); | |
540 | ||
541 | if (handled) { | |
542 | acpi_irq_handled++; | |
543 | return IRQ_HANDLED; | |
88bea188 LB |
544 | } else { |
545 | acpi_irq_not_handled++; | |
5229e87d | 546 | return IRQ_NONE; |
88bea188 | 547 | } |
1da177e4 LT |
548 | } |
549 | ||
550 | acpi_status | |
4be44fcd LB |
551 | acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler, |
552 | void *context) | |
1da177e4 LT |
553 | { |
554 | unsigned int irq; | |
555 | ||
5229e87d LB |
556 | acpi_irq_stats_init(); |
557 | ||
1da177e4 | 558 | /* |
23fe3630 RW |
559 | * ACPI interrupts different from the SCI in our copy of the FADT are |
560 | * not supported. | |
1da177e4 | 561 | */ |
23fe3630 RW |
562 | if (gsi != acpi_gbl_FADT.sci_interrupt) |
563 | return AE_BAD_PARAMETER; | |
564 | ||
565 | if (acpi_irq_handler) | |
566 | return AE_ALREADY_ACQUIRED; | |
567 | ||
1da177e4 LT |
568 | if (acpi_gsi_to_irq(gsi, &irq) < 0) { |
569 | printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n", | |
570 | gsi); | |
571 | return AE_OK; | |
572 | } | |
573 | ||
574 | acpi_irq_handler = handler; | |
575 | acpi_irq_context = context; | |
a8d46b9e | 576 | if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) { |
1da177e4 | 577 | printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq); |
23fe3630 | 578 | acpi_irq_handler = NULL; |
1da177e4 LT |
579 | return AE_NOT_ACQUIRED; |
580 | } | |
49e4b843 | 581 | acpi_sci_irq = irq; |
1da177e4 LT |
582 | |
583 | return AE_OK; | |
584 | } | |
585 | ||
49e4b843 | 586 | acpi_status acpi_os_remove_interrupt_handler(u32 gsi, acpi_osd_handler handler) |
1da177e4 | 587 | { |
49e4b843 | 588 | if (gsi != acpi_gbl_FADT.sci_interrupt || !acpi_sci_irq_valid()) |
23fe3630 RW |
589 | return AE_BAD_PARAMETER; |
590 | ||
49e4b843 | 591 | free_irq(acpi_sci_irq, acpi_irq); |
23fe3630 | 592 | acpi_irq_handler = NULL; |
49e4b843 | 593 | acpi_sci_irq = INVALID_ACPI_IRQ; |
1da177e4 LT |
594 | |
595 | return AE_OK; | |
596 | } | |
597 | ||
598 | /* | |
599 | * Running in interpreter thread context, safe to sleep | |
600 | */ | |
601 | ||
439913ff | 602 | void acpi_os_sleep(u64 ms) |
1da177e4 | 603 | { |
30282299 | 604 | msleep(ms); |
1da177e4 | 605 | } |
4be44fcd | 606 | |
4be44fcd | 607 | void acpi_os_stall(u32 us) |
1da177e4 LT |
608 | { |
609 | while (us) { | |
610 | u32 delay = 1000; | |
611 | ||
612 | if (delay > us) | |
613 | delay = us; | |
614 | udelay(delay); | |
615 | touch_nmi_watchdog(); | |
616 | us -= delay; | |
617 | } | |
618 | } | |
4be44fcd | 619 | |
1da177e4 LT |
620 | /* |
621 | * Support ACPI 3.0 AML Timer operand | |
622 | * Returns 64-bit free-running, monotonically increasing timer | |
623 | * with 100ns granularity | |
624 | */ | |
4be44fcd | 625 | u64 acpi_os_get_timer(void) |
1da177e4 | 626 | { |
10619066 MW |
627 | u64 time_ns = ktime_to_ns(ktime_get()); |
628 | do_div(time_ns, 100); | |
629 | return time_ns; | |
1da177e4 LT |
630 | } |
631 | ||
4be44fcd | 632 | acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width) |
1da177e4 LT |
633 | { |
634 | u32 dummy; | |
635 | ||
636 | if (!value) | |
637 | value = &dummy; | |
638 | ||
49fbabf5 ZY |
639 | *value = 0; |
640 | if (width <= 8) { | |
4be44fcd | 641 | *(u8 *) value = inb(port); |
49fbabf5 | 642 | } else if (width <= 16) { |
4be44fcd | 643 | *(u16 *) value = inw(port); |
49fbabf5 | 644 | } else if (width <= 32) { |
4be44fcd | 645 | *(u32 *) value = inl(port); |
49fbabf5 | 646 | } else { |
1da177e4 LT |
647 | BUG(); |
648 | } | |
649 | ||
650 | return AE_OK; | |
651 | } | |
4be44fcd | 652 | |
1da177e4 LT |
653 | EXPORT_SYMBOL(acpi_os_read_port); |
654 | ||
4be44fcd | 655 | acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width) |
1da177e4 | 656 | { |
49fbabf5 | 657 | if (width <= 8) { |
1da177e4 | 658 | outb(value, port); |
49fbabf5 | 659 | } else if (width <= 16) { |
1da177e4 | 660 | outw(value, port); |
49fbabf5 | 661 | } else if (width <= 32) { |
1da177e4 | 662 | outl(value, port); |
49fbabf5 | 663 | } else { |
1da177e4 LT |
664 | BUG(); |
665 | } | |
666 | ||
667 | return AE_OK; | |
668 | } | |
4be44fcd | 669 | |
1da177e4 LT |
670 | EXPORT_SYMBOL(acpi_os_write_port); |
671 | ||
e615bf5b | 672 | acpi_status |
653f4b53 | 673 | acpi_os_read_memory(acpi_physical_address phys_addr, u64 *value, u32 width) |
e615bf5b MS |
674 | { |
675 | void __iomem *virt_addr; | |
676 | unsigned int size = width / 8; | |
677 | bool unmap = false; | |
678 | u64 dummy; | |
679 | ||
680 | rcu_read_lock(); | |
681 | virt_addr = acpi_map_vaddr_lookup(phys_addr, size); | |
682 | if (!virt_addr) { | |
683 | rcu_read_unlock(); | |
684 | virt_addr = acpi_os_ioremap(phys_addr, size); | |
685 | if (!virt_addr) | |
686 | return AE_BAD_ADDRESS; | |
687 | unmap = true; | |
688 | } | |
689 | ||
690 | if (!value) | |
691 | value = &dummy; | |
692 | ||
693 | switch (width) { | |
694 | case 8: | |
695 | *(u8 *) value = readb(virt_addr); | |
696 | break; | |
697 | case 16: | |
698 | *(u16 *) value = readw(virt_addr); | |
699 | break; | |
700 | case 32: | |
701 | *(u32 *) value = readl(virt_addr); | |
702 | break; | |
703 | case 64: | |
3277b4ea | 704 | *(u64 *) value = readq(virt_addr); |
e615bf5b MS |
705 | break; |
706 | default: | |
707 | BUG(); | |
708 | } | |
709 | ||
710 | if (unmap) | |
711 | iounmap(virt_addr); | |
712 | else | |
713 | rcu_read_unlock(); | |
714 | ||
715 | return AE_OK; | |
716 | } | |
717 | ||
e615bf5b | 718 | acpi_status |
653f4b53 | 719 | acpi_os_write_memory(acpi_physical_address phys_addr, u64 value, u32 width) |
e615bf5b MS |
720 | { |
721 | void __iomem *virt_addr; | |
722 | unsigned int size = width / 8; | |
723 | bool unmap = false; | |
724 | ||
725 | rcu_read_lock(); | |
726 | virt_addr = acpi_map_vaddr_lookup(phys_addr, size); | |
727 | if (!virt_addr) { | |
728 | rcu_read_unlock(); | |
729 | virt_addr = acpi_os_ioremap(phys_addr, size); | |
730 | if (!virt_addr) | |
731 | return AE_BAD_ADDRESS; | |
732 | unmap = true; | |
733 | } | |
734 | ||
735 | switch (width) { | |
736 | case 8: | |
737 | writeb(value, virt_addr); | |
738 | break; | |
739 | case 16: | |
740 | writew(value, virt_addr); | |
741 | break; | |
742 | case 32: | |
743 | writel(value, virt_addr); | |
744 | break; | |
745 | case 64: | |
3277b4ea | 746 | writeq(value, virt_addr); |
e615bf5b MS |
747 | break; |
748 | default: | |
749 | BUG(); | |
750 | } | |
751 | ||
752 | if (unmap) | |
753 | iounmap(virt_addr); | |
754 | else | |
755 | rcu_read_unlock(); | |
756 | ||
757 | return AE_OK; | |
758 | } | |
759 | ||
1da177e4 | 760 | acpi_status |
4be44fcd | 761 | acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
c5f0231e | 762 | u64 *value, u32 width) |
1da177e4 LT |
763 | { |
764 | int result, size; | |
c5f0231e | 765 | u32 value32; |
1da177e4 LT |
766 | |
767 | if (!value) | |
768 | return AE_BAD_PARAMETER; | |
769 | ||
770 | switch (width) { | |
771 | case 8: | |
772 | size = 1; | |
773 | break; | |
774 | case 16: | |
775 | size = 2; | |
776 | break; | |
777 | case 32: | |
778 | size = 4; | |
779 | break; | |
780 | default: | |
781 | return AE_ERROR; | |
782 | } | |
783 | ||
b6ce068a MW |
784 | result = raw_pci_read(pci_id->segment, pci_id->bus, |
785 | PCI_DEVFN(pci_id->device, pci_id->function), | |
c5f0231e BM |
786 | reg, size, &value32); |
787 | *value = value32; | |
1da177e4 LT |
788 | |
789 | return (result ? AE_ERROR : AE_OK); | |
790 | } | |
4be44fcd | 791 | |
1da177e4 | 792 | acpi_status |
4be44fcd | 793 | acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
439913ff | 794 | u64 value, u32 width) |
1da177e4 LT |
795 | { |
796 | int result, size; | |
797 | ||
798 | switch (width) { | |
799 | case 8: | |
800 | size = 1; | |
801 | break; | |
802 | case 16: | |
803 | size = 2; | |
804 | break; | |
805 | case 32: | |
806 | size = 4; | |
807 | break; | |
808 | default: | |
809 | return AE_ERROR; | |
810 | } | |
811 | ||
b6ce068a MW |
812 | result = raw_pci_write(pci_id->segment, pci_id->bus, |
813 | PCI_DEVFN(pci_id->device, pci_id->function), | |
814 | reg, size, value); | |
1da177e4 LT |
815 | |
816 | return (result ? AE_ERROR : AE_OK); | |
817 | } | |
818 | ||
65f27f38 | 819 | static void acpi_os_execute_deferred(struct work_struct *work) |
88db5e14 AS |
820 | { |
821 | struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work); | |
88db5e14 | 822 | |
19cd847a ZR |
823 | dpc->function(dpc->context); |
824 | kfree(dpc); | |
19cd847a ZR |
825 | } |
826 | ||
836d0830 LZ |
827 | #ifdef CONFIG_ACPI_DEBUGGER |
828 | static struct acpi_debugger acpi_debugger; | |
829 | static bool acpi_debugger_initialized; | |
830 | ||
831 | int acpi_register_debugger(struct module *owner, | |
832 | const struct acpi_debugger_ops *ops) | |
833 | { | |
834 | int ret = 0; | |
835 | ||
836 | mutex_lock(&acpi_debugger.lock); | |
837 | if (acpi_debugger.ops) { | |
838 | ret = -EBUSY; | |
839 | goto err_lock; | |
840 | } | |
841 | ||
842 | acpi_debugger.owner = owner; | |
843 | acpi_debugger.ops = ops; | |
844 | ||
845 | err_lock: | |
846 | mutex_unlock(&acpi_debugger.lock); | |
847 | return ret; | |
848 | } | |
849 | EXPORT_SYMBOL(acpi_register_debugger); | |
850 | ||
851 | void acpi_unregister_debugger(const struct acpi_debugger_ops *ops) | |
852 | { | |
853 | mutex_lock(&acpi_debugger.lock); | |
854 | if (ops == acpi_debugger.ops) { | |
855 | acpi_debugger.ops = NULL; | |
856 | acpi_debugger.owner = NULL; | |
857 | } | |
858 | mutex_unlock(&acpi_debugger.lock); | |
859 | } | |
860 | EXPORT_SYMBOL(acpi_unregister_debugger); | |
861 | ||
862 | int acpi_debugger_create_thread(acpi_osd_exec_callback function, void *context) | |
863 | { | |
864 | int ret; | |
865 | int (*func)(acpi_osd_exec_callback, void *); | |
866 | struct module *owner; | |
867 | ||
868 | if (!acpi_debugger_initialized) | |
869 | return -ENODEV; | |
870 | mutex_lock(&acpi_debugger.lock); | |
871 | if (!acpi_debugger.ops) { | |
872 | ret = -ENODEV; | |
873 | goto err_lock; | |
874 | } | |
875 | if (!try_module_get(acpi_debugger.owner)) { | |
876 | ret = -ENODEV; | |
877 | goto err_lock; | |
878 | } | |
879 | func = acpi_debugger.ops->create_thread; | |
880 | owner = acpi_debugger.owner; | |
881 | mutex_unlock(&acpi_debugger.lock); | |
882 | ||
883 | ret = func(function, context); | |
884 | ||
885 | mutex_lock(&acpi_debugger.lock); | |
886 | module_put(owner); | |
887 | err_lock: | |
888 | mutex_unlock(&acpi_debugger.lock); | |
889 | return ret; | |
890 | } | |
891 | ||
892 | ssize_t acpi_debugger_write_log(const char *msg) | |
893 | { | |
894 | ssize_t ret; | |
895 | ssize_t (*func)(const char *); | |
896 | struct module *owner; | |
897 | ||
898 | if (!acpi_debugger_initialized) | |
899 | return -ENODEV; | |
900 | mutex_lock(&acpi_debugger.lock); | |
901 | if (!acpi_debugger.ops) { | |
902 | ret = -ENODEV; | |
903 | goto err_lock; | |
904 | } | |
905 | if (!try_module_get(acpi_debugger.owner)) { | |
906 | ret = -ENODEV; | |
907 | goto err_lock; | |
908 | } | |
909 | func = acpi_debugger.ops->write_log; | |
910 | owner = acpi_debugger.owner; | |
911 | mutex_unlock(&acpi_debugger.lock); | |
912 | ||
913 | ret = func(msg); | |
914 | ||
915 | mutex_lock(&acpi_debugger.lock); | |
916 | module_put(owner); | |
917 | err_lock: | |
918 | mutex_unlock(&acpi_debugger.lock); | |
919 | return ret; | |
920 | } | |
921 | ||
922 | ssize_t acpi_debugger_read_cmd(char *buffer, size_t buffer_length) | |
923 | { | |
924 | ssize_t ret; | |
925 | ssize_t (*func)(char *, size_t); | |
926 | struct module *owner; | |
927 | ||
928 | if (!acpi_debugger_initialized) | |
929 | return -ENODEV; | |
930 | mutex_lock(&acpi_debugger.lock); | |
931 | if (!acpi_debugger.ops) { | |
932 | ret = -ENODEV; | |
933 | goto err_lock; | |
934 | } | |
935 | if (!try_module_get(acpi_debugger.owner)) { | |
936 | ret = -ENODEV; | |
937 | goto err_lock; | |
938 | } | |
939 | func = acpi_debugger.ops->read_cmd; | |
940 | owner = acpi_debugger.owner; | |
941 | mutex_unlock(&acpi_debugger.lock); | |
942 | ||
943 | ret = func(buffer, buffer_length); | |
944 | ||
945 | mutex_lock(&acpi_debugger.lock); | |
946 | module_put(owner); | |
947 | err_lock: | |
948 | mutex_unlock(&acpi_debugger.lock); | |
949 | return ret; | |
950 | } | |
951 | ||
952 | int acpi_debugger_wait_command_ready(void) | |
953 | { | |
954 | int ret; | |
955 | int (*func)(bool, char *, size_t); | |
956 | struct module *owner; | |
957 | ||
958 | if (!acpi_debugger_initialized) | |
959 | return -ENODEV; | |
960 | mutex_lock(&acpi_debugger.lock); | |
961 | if (!acpi_debugger.ops) { | |
962 | ret = -ENODEV; | |
963 | goto err_lock; | |
964 | } | |
965 | if (!try_module_get(acpi_debugger.owner)) { | |
966 | ret = -ENODEV; | |
967 | goto err_lock; | |
968 | } | |
969 | func = acpi_debugger.ops->wait_command_ready; | |
970 | owner = acpi_debugger.owner; | |
971 | mutex_unlock(&acpi_debugger.lock); | |
972 | ||
973 | ret = func(acpi_gbl_method_executing, | |
974 | acpi_gbl_db_line_buf, ACPI_DB_LINE_BUFFER_SIZE); | |
975 | ||
976 | mutex_lock(&acpi_debugger.lock); | |
977 | module_put(owner); | |
978 | err_lock: | |
979 | mutex_unlock(&acpi_debugger.lock); | |
980 | return ret; | |
981 | } | |
982 | ||
983 | int acpi_debugger_notify_command_complete(void) | |
984 | { | |
985 | int ret; | |
986 | int (*func)(void); | |
987 | struct module *owner; | |
988 | ||
989 | if (!acpi_debugger_initialized) | |
990 | return -ENODEV; | |
991 | mutex_lock(&acpi_debugger.lock); | |
992 | if (!acpi_debugger.ops) { | |
993 | ret = -ENODEV; | |
994 | goto err_lock; | |
995 | } | |
996 | if (!try_module_get(acpi_debugger.owner)) { | |
997 | ret = -ENODEV; | |
998 | goto err_lock; | |
999 | } | |
1000 | func = acpi_debugger.ops->notify_command_complete; | |
1001 | owner = acpi_debugger.owner; | |
1002 | mutex_unlock(&acpi_debugger.lock); | |
1003 | ||
1004 | ret = func(); | |
1005 | ||
1006 | mutex_lock(&acpi_debugger.lock); | |
1007 | module_put(owner); | |
1008 | err_lock: | |
1009 | mutex_unlock(&acpi_debugger.lock); | |
1010 | return ret; | |
1011 | } | |
1012 | ||
1013 | int __init acpi_debugger_init(void) | |
1014 | { | |
1015 | mutex_init(&acpi_debugger.lock); | |
1016 | acpi_debugger_initialized = true; | |
1017 | return 0; | |
1018 | } | |
1019 | #endif | |
1020 | ||
b8d35192 AS |
1021 | /******************************************************************************* |
1022 | * | |
1023 | * FUNCTION: acpi_os_execute | |
1024 | * | |
1025 | * PARAMETERS: Type - Type of the callback | |
1026 | * Function - Function to be executed | |
1027 | * Context - Function parameters | |
1028 | * | |
1029 | * RETURN: Status | |
1030 | * | |
1031 | * DESCRIPTION: Depending on type, either queues function for deferred execution or | |
1032 | * immediately executes function on a separate thread. | |
1033 | * | |
1034 | ******************************************************************************/ | |
1035 | ||
7b98118a RW |
1036 | acpi_status acpi_os_execute(acpi_execute_type type, |
1037 | acpi_osd_exec_callback function, void *context) | |
1da177e4 | 1038 | { |
4be44fcd LB |
1039 | acpi_status status = AE_OK; |
1040 | struct acpi_os_dpc *dpc; | |
17bc54ee | 1041 | struct workqueue_struct *queue; |
19cd847a | 1042 | int ret; |
72945b2b LB |
1043 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
1044 | "Scheduling function [%p(%p)] for deferred execution.\n", | |
1045 | function, context)); | |
1da177e4 | 1046 | |
8cfb0cdf | 1047 | if (type == OSL_DEBUGGER_MAIN_THREAD) { |
836d0830 | 1048 | ret = acpi_debugger_create_thread(function, context); |
8cfb0cdf LZ |
1049 | if (ret) { |
1050 | pr_err("Call to kthread_create() failed.\n"); | |
1051 | status = AE_ERROR; | |
1052 | } | |
1053 | goto out_thread; | |
1054 | } | |
1055 | ||
1da177e4 LT |
1056 | /* |
1057 | * Allocate/initialize DPC structure. Note that this memory will be | |
65f27f38 | 1058 | * freed by the callee. The kernel handles the work_struct list in a |
1da177e4 LT |
1059 | * way that allows us to also free its memory inside the callee. |
1060 | * Because we may want to schedule several tasks with different | |
1061 | * parameters we can't use the approach some kernel code uses of | |
65f27f38 | 1062 | * having a static work_struct. |
1da177e4 | 1063 | */ |
72945b2b | 1064 | |
3ae45a27 | 1065 | dpc = kzalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC); |
1da177e4 | 1066 | if (!dpc) |
889c78be | 1067 | return AE_NO_MEMORY; |
b976fe19 | 1068 | |
1da177e4 LT |
1069 | dpc->function = function; |
1070 | dpc->context = context; | |
b976fe19 | 1071 | |
c02256be | 1072 | /* |
3ae45a27 RW |
1073 | * To prevent lockdep from complaining unnecessarily, make sure that |
1074 | * there is a different static lockdep key for each workqueue by using | |
1075 | * INIT_WORK() for each of them separately. | |
c02256be | 1076 | */ |
7b98118a | 1077 | if (type == OSL_NOTIFY_HANDLER) { |
3ae45a27 | 1078 | queue = kacpi_notify_wq; |
bc73675b | 1079 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); |
8cfb0cdf | 1080 | } else if (type == OSL_GPE_HANDLER) { |
3ae45a27 | 1081 | queue = kacpid_wq; |
bc73675b | 1082 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); |
8cfb0cdf LZ |
1083 | } else { |
1084 | pr_err("Unsupported os_execute type %d.\n", type); | |
1085 | status = AE_ERROR; | |
3ae45a27 | 1086 | } |
bc73675b | 1087 | |
8cfb0cdf LZ |
1088 | if (ACPI_FAILURE(status)) |
1089 | goto err_workqueue; | |
1090 | ||
8fec62b2 TH |
1091 | /* |
1092 | * On some machines, a software-initiated SMI causes corruption unless | |
1093 | * the SMI runs on CPU 0. An SMI can be initiated by any AML, but | |
1094 | * typically it's done in GPE-related methods that are run via | |
1095 | * workqueues, so we can avoid the known corruption cases by always | |
1096 | * queueing on CPU 0. | |
1097 | */ | |
1098 | ret = queue_work_on(0, queue, &dpc->work); | |
19cd847a | 1099 | if (!ret) { |
55ac9a01 LM |
1100 | printk(KERN_ERR PREFIX |
1101 | "Call to queue_work() failed.\n"); | |
17bc54ee | 1102 | status = AE_ERROR; |
1da177e4 | 1103 | } |
8cfb0cdf LZ |
1104 | err_workqueue: |
1105 | if (ACPI_FAILURE(status)) | |
1106 | kfree(dpc); | |
1107 | out_thread: | |
889c78be | 1108 | return status; |
1da177e4 | 1109 | } |
7b98118a | 1110 | EXPORT_SYMBOL(acpi_os_execute); |
4be44fcd | 1111 | |
7b98118a | 1112 | void acpi_os_wait_events_complete(void) |
19cd847a | 1113 | { |
90253a79 LZ |
1114 | /* |
1115 | * Make sure the GPE handler or the fixed event handler is not used | |
1116 | * on another CPU after removal. | |
1117 | */ | |
efb1cf7d CY |
1118 | if (acpi_sci_irq_valid()) |
1119 | synchronize_hardirq(acpi_sci_irq); | |
7b98118a RW |
1120 | flush_workqueue(kacpid_wq); |
1121 | flush_workqueue(kacpi_notify_wq); | |
19cd847a | 1122 | } |
1da177e4 | 1123 | |
7b98118a RW |
1124 | struct acpi_hp_work { |
1125 | struct work_struct work; | |
1e3bcb59 | 1126 | struct acpi_device *adev; |
7b98118a RW |
1127 | u32 src; |
1128 | }; | |
1129 | ||
1130 | static void acpi_hotplug_work_fn(struct work_struct *work) | |
19cd847a | 1131 | { |
7b98118a RW |
1132 | struct acpi_hp_work *hpw = container_of(work, struct acpi_hp_work, work); |
1133 | ||
1134 | acpi_os_wait_events_complete(); | |
1e3bcb59 | 1135 | acpi_device_hotplug(hpw->adev, hpw->src); |
7b98118a | 1136 | kfree(hpw); |
19cd847a ZR |
1137 | } |
1138 | ||
1e3bcb59 | 1139 | acpi_status acpi_hotplug_schedule(struct acpi_device *adev, u32 src) |
1da177e4 | 1140 | { |
7b98118a RW |
1141 | struct acpi_hp_work *hpw; |
1142 | ||
1143 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, | |
1e3bcb59 RW |
1144 | "Scheduling hotplug event (%p, %u) for deferred execution.\n", |
1145 | adev, src)); | |
7b98118a RW |
1146 | |
1147 | hpw = kmalloc(sizeof(*hpw), GFP_KERNEL); | |
1148 | if (!hpw) | |
1149 | return AE_NO_MEMORY; | |
1150 | ||
1151 | INIT_WORK(&hpw->work, acpi_hotplug_work_fn); | |
1e3bcb59 | 1152 | hpw->adev = adev; |
7b98118a RW |
1153 | hpw->src = src; |
1154 | /* | |
1155 | * We can't run hotplug code in kacpid_wq/kacpid_notify_wq etc., because | |
1156 | * the hotplug code may call driver .remove() functions, which may | |
1157 | * invoke flush_scheduled_work()/acpi_os_wait_events_complete() to flush | |
1158 | * these workqueues. | |
1159 | */ | |
1160 | if (!queue_work(kacpi_hotplug_wq, &hpw->work)) { | |
1161 | kfree(hpw); | |
1162 | return AE_ERROR; | |
1163 | } | |
1164 | return AE_OK; | |
1da177e4 | 1165 | } |
4be44fcd | 1166 | |
d783156e RW |
1167 | bool acpi_queue_hotplug_work(struct work_struct *work) |
1168 | { | |
1169 | return queue_work(kacpi_hotplug_wq, work); | |
1170 | } | |
1da177e4 | 1171 | |
1da177e4 | 1172 | acpi_status |
4be44fcd | 1173 | acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle) |
1da177e4 | 1174 | { |
4be44fcd | 1175 | struct semaphore *sem = NULL; |
1da177e4 | 1176 | |
2d0acb4a | 1177 | sem = acpi_os_allocate_zeroed(sizeof(struct semaphore)); |
1da177e4 | 1178 | if (!sem) |
d550d98d | 1179 | return AE_NO_MEMORY; |
1da177e4 LT |
1180 | |
1181 | sema_init(sem, initial_units); | |
1182 | ||
4be44fcd | 1183 | *handle = (acpi_handle *) sem; |
1da177e4 | 1184 | |
4be44fcd LB |
1185 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n", |
1186 | *handle, initial_units)); | |
1da177e4 | 1187 | |
d550d98d | 1188 | return AE_OK; |
1da177e4 | 1189 | } |
1da177e4 | 1190 | |
1da177e4 LT |
1191 | /* |
1192 | * TODO: A better way to delete semaphores? Linux doesn't have a | |
1193 | * 'delete_semaphore()' function -- may result in an invalid | |
1194 | * pointer dereference for non-synchronized consumers. Should | |
1195 | * we at least check for blocked threads and signal/cancel them? | |
1196 | */ | |
1197 | ||
4be44fcd | 1198 | acpi_status acpi_os_delete_semaphore(acpi_handle handle) |
1da177e4 | 1199 | { |
4be44fcd | 1200 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 1201 | |
1da177e4 | 1202 | if (!sem) |
d550d98d | 1203 | return AE_BAD_PARAMETER; |
1da177e4 | 1204 | |
4be44fcd | 1205 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle)); |
1da177e4 | 1206 | |
f1241c87 | 1207 | BUG_ON(!list_empty(&sem->wait_list)); |
02438d87 | 1208 | kfree(sem); |
4be44fcd | 1209 | sem = NULL; |
1da177e4 | 1210 | |
d550d98d | 1211 | return AE_OK; |
1da177e4 | 1212 | } |
1da177e4 | 1213 | |
1da177e4 | 1214 | /* |
1da177e4 LT |
1215 | * TODO: Support for units > 1? |
1216 | */ | |
4be44fcd | 1217 | acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout) |
1da177e4 | 1218 | { |
4be44fcd LB |
1219 | acpi_status status = AE_OK; |
1220 | struct semaphore *sem = (struct semaphore *)handle; | |
f1241c87 | 1221 | long jiffies; |
4be44fcd | 1222 | int ret = 0; |
1da177e4 | 1223 | |
7901a052 LZ |
1224 | if (!acpi_os_initialized) |
1225 | return AE_OK; | |
1226 | ||
1da177e4 | 1227 | if (!sem || (units < 1)) |
d550d98d | 1228 | return AE_BAD_PARAMETER; |
1da177e4 LT |
1229 | |
1230 | if (units > 1) | |
d550d98d | 1231 | return AE_SUPPORT; |
1da177e4 | 1232 | |
4be44fcd LB |
1233 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n", |
1234 | handle, units, timeout)); | |
1da177e4 | 1235 | |
f1241c87 MW |
1236 | if (timeout == ACPI_WAIT_FOREVER) |
1237 | jiffies = MAX_SCHEDULE_TIMEOUT; | |
1238 | else | |
1239 | jiffies = msecs_to_jiffies(timeout); | |
cad1525a | 1240 | |
f1241c87 MW |
1241 | ret = down_timeout(sem, jiffies); |
1242 | if (ret) | |
1243 | status = AE_TIME; | |
1da177e4 LT |
1244 | |
1245 | if (ACPI_FAILURE(status)) { | |
9e7e2c04 | 1246 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, |
a6fc6720 | 1247 | "Failed to acquire semaphore[%p|%d|%d], %s", |
4be44fcd LB |
1248 | handle, units, timeout, |
1249 | acpi_format_exception(status))); | |
1250 | } else { | |
1251 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, | |
a6fc6720 | 1252 | "Acquired semaphore[%p|%d|%d]", handle, |
4be44fcd | 1253 | units, timeout)); |
1da177e4 LT |
1254 | } |
1255 | ||
d550d98d | 1256 | return status; |
1da177e4 | 1257 | } |
1da177e4 | 1258 | |
1da177e4 LT |
1259 | /* |
1260 | * TODO: Support for units > 1? | |
1261 | */ | |
4be44fcd | 1262 | acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units) |
1da177e4 | 1263 | { |
4be44fcd | 1264 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 1265 | |
7901a052 LZ |
1266 | if (!acpi_os_initialized) |
1267 | return AE_OK; | |
1268 | ||
1da177e4 | 1269 | if (!sem || (units < 1)) |
d550d98d | 1270 | return AE_BAD_PARAMETER; |
1da177e4 LT |
1271 | |
1272 | if (units > 1) | |
d550d98d | 1273 | return AE_SUPPORT; |
1da177e4 | 1274 | |
4be44fcd LB |
1275 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle, |
1276 | units)); | |
1da177e4 LT |
1277 | |
1278 | up(sem); | |
1279 | ||
d550d98d | 1280 | return AE_OK; |
1da177e4 | 1281 | } |
4be44fcd | 1282 | |
4d946f79 | 1283 | acpi_status acpi_os_get_line(char *buffer, u32 buffer_length, u32 *bytes_read) |
1da177e4 | 1284 | { |
1da177e4 LT |
1285 | #ifdef ENABLE_DEBUGGER |
1286 | if (acpi_in_debugger) { | |
1287 | u32 chars; | |
1288 | ||
4d946f79 | 1289 | kdb_read(buffer, buffer_length); |
1da177e4 LT |
1290 | |
1291 | /* remove the CR kdb includes */ | |
1292 | chars = strlen(buffer) - 1; | |
1293 | buffer[chars] = '\0'; | |
1294 | } | |
8cfb0cdf LZ |
1295 | #else |
1296 | int ret; | |
1297 | ||
836d0830 | 1298 | ret = acpi_debugger_read_cmd(buffer, buffer_length); |
8cfb0cdf LZ |
1299 | if (ret < 0) |
1300 | return AE_ERROR; | |
1301 | if (bytes_read) | |
1302 | *bytes_read = ret; | |
1da177e4 LT |
1303 | #endif |
1304 | ||
4d946f79 | 1305 | return AE_OK; |
1da177e4 | 1306 | } |
836d0830 | 1307 | EXPORT_SYMBOL(acpi_os_get_line); |
1da177e4 | 1308 | |
8cfb0cdf LZ |
1309 | acpi_status acpi_os_wait_command_ready(void) |
1310 | { | |
1311 | int ret; | |
1312 | ||
836d0830 | 1313 | ret = acpi_debugger_wait_command_ready(); |
8cfb0cdf LZ |
1314 | if (ret < 0) |
1315 | return AE_ERROR; | |
1316 | return AE_OK; | |
1317 | } | |
1318 | ||
1319 | acpi_status acpi_os_notify_command_complete(void) | |
1320 | { | |
1321 | int ret; | |
1322 | ||
836d0830 | 1323 | ret = acpi_debugger_notify_command_complete(); |
8cfb0cdf LZ |
1324 | if (ret < 0) |
1325 | return AE_ERROR; | |
1326 | return AE_OK; | |
1327 | } | |
1328 | ||
4be44fcd | 1329 | acpi_status acpi_os_signal(u32 function, void *info) |
1da177e4 | 1330 | { |
4be44fcd | 1331 | switch (function) { |
1da177e4 LT |
1332 | case ACPI_SIGNAL_FATAL: |
1333 | printk(KERN_ERR PREFIX "Fatal opcode executed\n"); | |
1334 | break; | |
1335 | case ACPI_SIGNAL_BREAKPOINT: | |
1336 | /* | |
1337 | * AML Breakpoint | |
1338 | * ACPI spec. says to treat it as a NOP unless | |
1339 | * you are debugging. So if/when we integrate | |
1340 | * AML debugger into the kernel debugger its | |
1341 | * hook will go here. But until then it is | |
1342 | * not useful to print anything on breakpoints. | |
1343 | */ | |
1344 | break; | |
1345 | default: | |
1346 | break; | |
1347 | } | |
1348 | ||
1349 | return AE_OK; | |
1350 | } | |
4be44fcd | 1351 | |
4be44fcd | 1352 | static int __init acpi_os_name_setup(char *str) |
1da177e4 LT |
1353 | { |
1354 | char *p = acpi_os_name; | |
4be44fcd | 1355 | int count = ACPI_MAX_OVERRIDE_LEN - 1; |
1da177e4 LT |
1356 | |
1357 | if (!str || !*str) | |
1358 | return 0; | |
1359 | ||
5e2be4e0 | 1360 | for (; count-- && *str; str++) { |
1da177e4 LT |
1361 | if (isalnum(*str) || *str == ' ' || *str == ':') |
1362 | *p++ = *str; | |
1363 | else if (*str == '\'' || *str == '"') | |
1364 | continue; | |
1365 | else | |
1366 | break; | |
1367 | } | |
1368 | *p = 0; | |
1369 | ||
1370 | return 1; | |
4be44fcd | 1371 | |
1da177e4 LT |
1372 | } |
1373 | ||
1374 | __setup("acpi_os_name=", acpi_os_name_setup); | |
1375 | ||
22b5afce | 1376 | /* |
08e1d7c0 | 1377 | * Disable the auto-serialization of named objects creation methods. |
22b5afce | 1378 | * |
08e1d7c0 | 1379 | * This feature is enabled by default. It marks the AML control methods |
22b5afce BM |
1380 | * that contain the opcodes to create named objects as "Serialized". |
1381 | */ | |
08e1d7c0 | 1382 | static int __init acpi_no_auto_serialize_setup(char *str) |
1da177e4 | 1383 | { |
08e1d7c0 LZ |
1384 | acpi_gbl_auto_serialize_methods = FALSE; |
1385 | pr_info("ACPI: auto-serialization disabled\n"); | |
1da177e4 LT |
1386 | |
1387 | return 1; | |
1388 | } | |
1389 | ||
08e1d7c0 | 1390 | __setup("acpi_no_auto_serialize", acpi_no_auto_serialize_setup); |
1da177e4 | 1391 | |
df92e695 TR |
1392 | /* Check of resource interference between native drivers and ACPI |
1393 | * OperationRegions (SystemIO and System Memory only). | |
1394 | * IO ports and memory declared in ACPI might be used by the ACPI subsystem | |
1395 | * in arbitrary AML code and can interfere with legacy drivers. | |
1396 | * acpi_enforce_resources= can be set to: | |
1397 | * | |
7e90560c | 1398 | * - strict (default) (2) |
df92e695 | 1399 | * -> further driver trying to access the resources will not load |
7e90560c | 1400 | * - lax (1) |
df92e695 TR |
1401 | * -> further driver trying to access the resources will load, but you |
1402 | * get a system message that something might go wrong... | |
1403 | * | |
1404 | * - no (0) | |
1405 | * -> ACPI Operation Region resources will not be registered | |
1406 | * | |
1407 | */ | |
1408 | #define ENFORCE_RESOURCES_STRICT 2 | |
1409 | #define ENFORCE_RESOURCES_LAX 1 | |
1410 | #define ENFORCE_RESOURCES_NO 0 | |
1411 | ||
7e90560c | 1412 | static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; |
df92e695 TR |
1413 | |
1414 | static int __init acpi_enforce_resources_setup(char *str) | |
1415 | { | |
1416 | if (str == NULL || *str == '\0') | |
1417 | return 0; | |
1418 | ||
1419 | if (!strcmp("strict", str)) | |
1420 | acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; | |
1421 | else if (!strcmp("lax", str)) | |
1422 | acpi_enforce_resources = ENFORCE_RESOURCES_LAX; | |
1423 | else if (!strcmp("no", str)) | |
1424 | acpi_enforce_resources = ENFORCE_RESOURCES_NO; | |
1425 | ||
1426 | return 1; | |
1427 | } | |
1428 | ||
1429 | __setup("acpi_enforce_resources=", acpi_enforce_resources_setup); | |
1430 | ||
1431 | /* Check for resource conflicts between ACPI OperationRegions and native | |
1432 | * drivers */ | |
876fba43 | 1433 | int acpi_check_resource_conflict(const struct resource *res) |
df92e695 | 1434 | { |
f654c0fe LM |
1435 | acpi_adr_space_type space_id; |
1436 | acpi_size length; | |
1437 | u8 warn = 0; | |
1438 | int clash = 0; | |
df92e695 TR |
1439 | |
1440 | if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) | |
1441 | return 0; | |
1442 | if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM)) | |
1443 | return 0; | |
1444 | ||
f654c0fe LM |
1445 | if (res->flags & IORESOURCE_IO) |
1446 | space_id = ACPI_ADR_SPACE_SYSTEM_IO; | |
1447 | else | |
1448 | space_id = ACPI_ADR_SPACE_SYSTEM_MEMORY; | |
df92e695 | 1449 | |
e4f52244 | 1450 | length = resource_size(res); |
f654c0fe LM |
1451 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) |
1452 | warn = 1; | |
1453 | clash = acpi_check_address_range(space_id, res->start, length, warn); | |
df92e695 TR |
1454 | |
1455 | if (clash) { | |
1456 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) { | |
14f03343 JD |
1457 | if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX) |
1458 | printk(KERN_NOTICE "ACPI: This conflict may" | |
1459 | " cause random problems and system" | |
1460 | " instability\n"); | |
1461 | printk(KERN_INFO "ACPI: If an ACPI driver is available" | |
1462 | " for this device, you should use it instead of" | |
1463 | " the native driver\n"); | |
df92e695 TR |
1464 | } |
1465 | if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT) | |
1466 | return -EBUSY; | |
1467 | } | |
1468 | return 0; | |
1469 | } | |
443dea72 | 1470 | EXPORT_SYMBOL(acpi_check_resource_conflict); |
df92e695 TR |
1471 | |
1472 | int acpi_check_region(resource_size_t start, resource_size_t n, | |
1473 | const char *name) | |
1474 | { | |
1475 | struct resource res = { | |
1476 | .start = start, | |
1477 | .end = start + n - 1, | |
1478 | .name = name, | |
1479 | .flags = IORESOURCE_IO, | |
1480 | }; | |
1481 | ||
1482 | return acpi_check_resource_conflict(&res); | |
1483 | } | |
1484 | EXPORT_SYMBOL(acpi_check_region); | |
1485 | ||
70dd6bea JD |
1486 | /* |
1487 | * Let drivers know whether the resource checks are effective | |
1488 | */ | |
1489 | int acpi_resources_are_enforced(void) | |
1490 | { | |
1491 | return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT; | |
1492 | } | |
1493 | EXPORT_SYMBOL(acpi_resources_are_enforced); | |
1494 | ||
9f63b88b LM |
1495 | /* |
1496 | * Deallocate the memory for a spinlock. | |
1497 | */ | |
1498 | void acpi_os_delete_lock(acpi_spinlock handle) | |
1499 | { | |
1500 | ACPI_FREE(handle); | |
1501 | } | |
1502 | ||
73459f73 RM |
1503 | /* |
1504 | * Acquire a spinlock. | |
1505 | * | |
1506 | * handle is a pointer to the spinlock_t. | |
73459f73 RM |
1507 | */ |
1508 | ||
967440e3 | 1509 | acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp) |
73459f73 | 1510 | { |
b8e4d893 | 1511 | acpi_cpu_flags flags; |
967440e3 | 1512 | spin_lock_irqsave(lockp, flags); |
73459f73 RM |
1513 | return flags; |
1514 | } | |
1515 | ||
1516 | /* | |
1517 | * Release a spinlock. See above. | |
1518 | */ | |
1519 | ||
967440e3 | 1520 | void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags) |
73459f73 | 1521 | { |
967440e3 | 1522 | spin_unlock_irqrestore(lockp, flags); |
73459f73 RM |
1523 | } |
1524 | ||
73459f73 RM |
1525 | #ifndef ACPI_USE_LOCAL_CACHE |
1526 | ||
1527 | /******************************************************************************* | |
1528 | * | |
1529 | * FUNCTION: acpi_os_create_cache | |
1530 | * | |
b229cf92 BM |
1531 | * PARAMETERS: name - Ascii name for the cache |
1532 | * size - Size of each cached object | |
1533 | * depth - Maximum depth of the cache (in objects) <ignored> | |
1534 | * cache - Where the new cache object is returned | |
73459f73 | 1535 | * |
b229cf92 | 1536 | * RETURN: status |
73459f73 RM |
1537 | * |
1538 | * DESCRIPTION: Create a cache object | |
1539 | * | |
1540 | ******************************************************************************/ | |
1541 | ||
1542 | acpi_status | |
4be44fcd | 1543 | acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache) |
73459f73 | 1544 | { |
20c2df83 | 1545 | *cache = kmem_cache_create(name, size, 0, 0, NULL); |
a6fdbf90 | 1546 | if (*cache == NULL) |
b229cf92 BM |
1547 | return AE_ERROR; |
1548 | else | |
1549 | return AE_OK; | |
73459f73 RM |
1550 | } |
1551 | ||
1552 | /******************************************************************************* | |
1553 | * | |
1554 | * FUNCTION: acpi_os_purge_cache | |
1555 | * | |
1556 | * PARAMETERS: Cache - Handle to cache object | |
1557 | * | |
1558 | * RETURN: Status | |
1559 | * | |
1560 | * DESCRIPTION: Free all objects within the requested cache. | |
1561 | * | |
1562 | ******************************************************************************/ | |
1563 | ||
4be44fcd | 1564 | acpi_status acpi_os_purge_cache(acpi_cache_t * cache) |
73459f73 | 1565 | { |
50dd0969 | 1566 | kmem_cache_shrink(cache); |
4be44fcd | 1567 | return (AE_OK); |
73459f73 RM |
1568 | } |
1569 | ||
1570 | /******************************************************************************* | |
1571 | * | |
1572 | * FUNCTION: acpi_os_delete_cache | |
1573 | * | |
1574 | * PARAMETERS: Cache - Handle to cache object | |
1575 | * | |
1576 | * RETURN: Status | |
1577 | * | |
1578 | * DESCRIPTION: Free all objects within the requested cache and delete the | |
1579 | * cache object. | |
1580 | * | |
1581 | ******************************************************************************/ | |
1582 | ||
4be44fcd | 1583 | acpi_status acpi_os_delete_cache(acpi_cache_t * cache) |
73459f73 | 1584 | { |
1a1d92c1 | 1585 | kmem_cache_destroy(cache); |
4be44fcd | 1586 | return (AE_OK); |
73459f73 RM |
1587 | } |
1588 | ||
1589 | /******************************************************************************* | |
1590 | * | |
1591 | * FUNCTION: acpi_os_release_object | |
1592 | * | |
1593 | * PARAMETERS: Cache - Handle to cache object | |
1594 | * Object - The object to be released | |
1595 | * | |
1596 | * RETURN: None | |
1597 | * | |
1598 | * DESCRIPTION: Release an object to the specified cache. If cache is full, | |
1599 | * the object is deleted. | |
1600 | * | |
1601 | ******************************************************************************/ | |
1602 | ||
4be44fcd | 1603 | acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object) |
73459f73 | 1604 | { |
4be44fcd LB |
1605 | kmem_cache_free(cache, object); |
1606 | return (AE_OK); | |
73459f73 | 1607 | } |
73459f73 | 1608 | #endif |
d362edaf | 1609 | |
a94e88cd | 1610 | static int __init acpi_no_static_ssdt_setup(char *s) |
b75dd297 | 1611 | { |
a94e88cd LZ |
1612 | acpi_gbl_disable_ssdt_table_install = TRUE; |
1613 | pr_info("ACPI: static SSDT installation disabled\n"); | |
b75dd297 | 1614 | |
a94e88cd | 1615 | return 0; |
b75dd297 LZ |
1616 | } |
1617 | ||
a94e88cd | 1618 | early_param("acpi_no_static_ssdt", acpi_no_static_ssdt_setup); |
b75dd297 | 1619 | |
4dde507f LZ |
1620 | static int __init acpi_disable_return_repair(char *s) |
1621 | { | |
1622 | printk(KERN_NOTICE PREFIX | |
1623 | "ACPI: Predefined validation mechanism disabled\n"); | |
1624 | acpi_gbl_disable_auto_repair = TRUE; | |
1625 | ||
1626 | return 1; | |
1627 | } | |
1628 | ||
1629 | __setup("acpica_no_return_repair", acpi_disable_return_repair); | |
1630 | ||
d362edaf MS |
1631 | acpi_status __init acpi_os_initialize(void) |
1632 | { | |
1633 | acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block); | |
1634 | acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block); | |
1635 | acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block); | |
1636 | acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block); | |
a4714a89 RW |
1637 | if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) { |
1638 | /* | |
1639 | * Use acpi_os_map_generic_address to pre-map the reset | |
1640 | * register if it's in system memory. | |
1641 | */ | |
1642 | int rv; | |
1643 | ||
1644 | rv = acpi_os_map_generic_address(&acpi_gbl_FADT.reset_register); | |
1645 | pr_debug(PREFIX "%s: map reset_reg status %d\n", __func__, rv); | |
1646 | } | |
7901a052 | 1647 | acpi_os_initialized = true; |
d362edaf MS |
1648 | |
1649 | return AE_OK; | |
1650 | } | |
1651 | ||
32d47eef | 1652 | acpi_status __init acpi_os_initialize1(void) |
d362edaf | 1653 | { |
44d2588e TH |
1654 | kacpid_wq = alloc_workqueue("kacpid", 0, 1); |
1655 | kacpi_notify_wq = alloc_workqueue("kacpi_notify", 0, 1); | |
d783156e | 1656 | kacpi_hotplug_wq = alloc_ordered_workqueue("kacpi_hotplug", 0); |
d362edaf MS |
1657 | BUG_ON(!kacpid_wq); |
1658 | BUG_ON(!kacpi_notify_wq); | |
1659 | BUG_ON(!kacpi_hotplug_wq); | |
e5f660eb | 1660 | acpi_osi_init(); |
d362edaf MS |
1661 | return AE_OK; |
1662 | } | |
1663 | ||
1664 | acpi_status acpi_os_terminate(void) | |
1665 | { | |
1666 | if (acpi_irq_handler) { | |
23fe3630 | 1667 | acpi_os_remove_interrupt_handler(acpi_gbl_FADT.sci_interrupt, |
d362edaf MS |
1668 | acpi_irq_handler); |
1669 | } | |
1670 | ||
1671 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe1_block); | |
1672 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block); | |
1673 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block); | |
1674 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block); | |
a4714a89 RW |
1675 | if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) |
1676 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.reset_register); | |
d362edaf MS |
1677 | |
1678 | destroy_workqueue(kacpid_wq); | |
1679 | destroy_workqueue(kacpi_notify_wq); | |
1680 | destroy_workqueue(kacpi_hotplug_wq); | |
1681 | ||
1682 | return AE_OK; | |
1683 | } | |
09f98a82 TL |
1684 | |
1685 | acpi_status acpi_os_prepare_sleep(u8 sleep_state, u32 pm1a_control, | |
1686 | u32 pm1b_control) | |
1687 | { | |
1688 | int rc = 0; | |
1689 | if (__acpi_os_prepare_sleep) | |
1690 | rc = __acpi_os_prepare_sleep(sleep_state, | |
1691 | pm1a_control, pm1b_control); | |
1692 | if (rc < 0) | |
1693 | return AE_ERROR; | |
1694 | else if (rc > 0) | |
1695 | return AE_CTRL_SKIP; | |
1696 | ||
1697 | return AE_OK; | |
1698 | } | |
1699 | ||
1700 | void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state, | |
1701 | u32 pm1a_ctrl, u32 pm1b_ctrl)) | |
1702 | { | |
1703 | __acpi_os_prepare_sleep = func; | |
1704 | } | |
92d8aff3 | 1705 | |
d6b47b12 BG |
1706 | acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state, u32 val_a, |
1707 | u32 val_b) | |
1708 | { | |
1709 | int rc = 0; | |
1710 | if (__acpi_os_prepare_extended_sleep) | |
1711 | rc = __acpi_os_prepare_extended_sleep(sleep_state, | |
1712 | val_a, val_b); | |
1713 | if (rc < 0) | |
1714 | return AE_ERROR; | |
1715 | else if (rc > 0) | |
1716 | return AE_CTRL_SKIP; | |
1717 | ||
1718 | return AE_OK; | |
1719 | } | |
1720 | ||
1721 | void acpi_os_set_prepare_extended_sleep(int (*func)(u8 sleep_state, | |
1722 | u32 val_a, u32 val_b)) | |
1723 | { | |
1724 | __acpi_os_prepare_extended_sleep = func; | |
1725 | } |