]>
Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * acpi_osl.c - OS-dependent functions ($Revision: 83 $) | |
3 | * | |
4 | * Copyright (C) 2000 Andrew Henroid | |
5 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> | |
6 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
f1241c87 MW |
7 | * Copyright (c) 2008 Intel Corporation |
8 | * Author: Matthew Wilcox <willy@linux.intel.com> | |
1da177e4 LT |
9 | * |
10 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2 of the License, or | |
15 | * (at your option) any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
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> | |
7c0f6ba6 | 45 | #include <linux/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; |
8d3523fb | 79 | bool acpi_permanent_mmap = false; |
1da177e4 | 80 | |
620242ae MS |
81 | /* |
82 | * This list of permanent mappings is for memory that may be accessed from | |
83 | * interrupt context, where we can't do the ioremap(). | |
84 | */ | |
85 | struct acpi_ioremap { | |
86 | struct list_head list; | |
87 | void __iomem *virt; | |
88 | acpi_physical_address phys; | |
89 | acpi_size size; | |
b7c1fadd | 90 | unsigned long refcount; |
620242ae MS |
91 | }; |
92 | ||
93 | static LIST_HEAD(acpi_ioremaps); | |
7bbb8903 | 94 | static DEFINE_MUTEX(acpi_ioremap_lock); |
620242ae | 95 | |
bc9ffce2 | 96 | static void __init acpi_request_region (struct acpi_generic_address *gas, |
9a47cdb1 BH |
97 | unsigned int length, char *desc) |
98 | { | |
bc9ffce2 MS |
99 | u64 addr; |
100 | ||
101 | /* Handle possible alignment issues */ | |
102 | memcpy(&addr, &gas->address, sizeof(addr)); | |
103 | if (!addr || !length) | |
9a47cdb1 BH |
104 | return; |
105 | ||
0294112e RW |
106 | /* Resources are never freed */ |
107 | if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_IO) | |
108 | request_region(addr, length, desc); | |
109 | else if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) | |
110 | request_mem_region(addr, length, desc); | |
9a47cdb1 BH |
111 | } |
112 | ||
0294112e | 113 | static int __init acpi_reserve_resources(void) |
9a47cdb1 | 114 | { |
eee3c859 | 115 | acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
116 | "ACPI PM1a_EVT_BLK"); |
117 | ||
eee3c859 | 118 | acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
119 | "ACPI PM1b_EVT_BLK"); |
120 | ||
eee3c859 | 121 | acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
122 | "ACPI PM1a_CNT_BLK"); |
123 | ||
eee3c859 | 124 | acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
125 | "ACPI PM1b_CNT_BLK"); |
126 | ||
eee3c859 LB |
127 | if (acpi_gbl_FADT.pm_timer_length == 4) |
128 | acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR"); | |
9a47cdb1 | 129 | |
eee3c859 | 130 | acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length, |
9a47cdb1 BH |
131 | "ACPI PM2_CNT_BLK"); |
132 | ||
133 | /* Length of GPE blocks must be a non-negative multiple of 2 */ | |
134 | ||
eee3c859 LB |
135 | if (!(acpi_gbl_FADT.gpe0_block_length & 0x1)) |
136 | acpi_request_region(&acpi_gbl_FADT.xgpe0_block, | |
137 | acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK"); | |
9a47cdb1 | 138 | |
eee3c859 LB |
139 | if (!(acpi_gbl_FADT.gpe1_block_length & 0x1)) |
140 | acpi_request_region(&acpi_gbl_FADT.xgpe1_block, | |
141 | acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK"); | |
0294112e RW |
142 | |
143 | return 0; | |
9a47cdb1 | 144 | } |
0294112e | 145 | fs_initcall_sync(acpi_reserve_resources); |
9a47cdb1 | 146 | |
4be44fcd | 147 | void acpi_os_printf(const char *fmt, ...) |
1da177e4 LT |
148 | { |
149 | va_list args; | |
150 | va_start(args, fmt); | |
151 | acpi_os_vprintf(fmt, args); | |
152 | va_end(args); | |
153 | } | |
836d0830 | 154 | EXPORT_SYMBOL(acpi_os_printf); |
4be44fcd | 155 | |
4be44fcd | 156 | void acpi_os_vprintf(const char *fmt, va_list args) |
1da177e4 LT |
157 | { |
158 | static char buffer[512]; | |
4be44fcd | 159 | |
1da177e4 LT |
160 | vsprintf(buffer, fmt, args); |
161 | ||
162 | #ifdef ENABLE_DEBUGGER | |
163 | if (acpi_in_debugger) { | |
164 | kdb_printf("%s", buffer); | |
165 | } else { | |
abc4b9a5 JP |
166 | if (printk_get_level(buffer)) |
167 | printk("%s", buffer); | |
168 | else | |
169 | printk(KERN_CONT "%s", buffer); | |
1da177e4 LT |
170 | } |
171 | #else | |
abc4b9a5 JP |
172 | if (acpi_debugger_write_log(buffer) < 0) { |
173 | if (printk_get_level(buffer)) | |
174 | printk("%s", buffer); | |
175 | else | |
176 | printk(KERN_CONT "%s", buffer); | |
177 | } | |
1da177e4 LT |
178 | #endif |
179 | } | |
180 | ||
4996c023 TI |
181 | #ifdef CONFIG_KEXEC |
182 | static unsigned long acpi_rsdp; | |
183 | static int __init setup_acpi_rsdp(char *arg) | |
184 | { | |
5dcb9ca8 | 185 | return kstrtoul(arg, 16, &acpi_rsdp); |
4996c023 TI |
186 | } |
187 | early_param("acpi_rsdp", setup_acpi_rsdp); | |
188 | #endif | |
189 | ||
ad71860a | 190 | acpi_physical_address __init acpi_os_get_root_pointer(void) |
1da177e4 | 191 | { |
2fb65f09 AS |
192 | acpi_physical_address pa = 0; |
193 | ||
4996c023 TI |
194 | #ifdef CONFIG_KEXEC |
195 | if (acpi_rsdp) | |
196 | return acpi_rsdp; | |
197 | #endif | |
198 | ||
83e68189 | 199 | if (efi_enabled(EFI_CONFIG_TABLES)) { |
b2c99e3c | 200 | if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) |
ad71860a | 201 | return efi.acpi20; |
2fb65f09 | 202 | if (efi.acpi != EFI_INVALID_TABLE_ADDR) |
ad71860a | 203 | return efi.acpi; |
2fb65f09 | 204 | pr_err(PREFIX "System description tables not found\n"); |
8a1664be | 205 | } else if (IS_ENABLED(CONFIG_ACPI_LEGACY_TABLES_LOOKUP)) { |
239665a3 | 206 | acpi_find_root_pointer(&pa); |
239665a3 | 207 | } |
8a1664be | 208 | |
2fb65f09 | 209 | return pa; |
1da177e4 LT |
210 | } |
211 | ||
78cdb3ed | 212 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ |
4a3cba5e MS |
213 | static struct acpi_ioremap * |
214 | acpi_map_lookup(acpi_physical_address phys, acpi_size size) | |
620242ae MS |
215 | { |
216 | struct acpi_ioremap *map; | |
217 | ||
78cdb3ed | 218 | list_for_each_entry_rcu(map, &acpi_ioremaps, list) |
620242ae MS |
219 | if (map->phys <= phys && |
220 | phys + size <= map->phys + map->size) | |
4a3cba5e MS |
221 | return map; |
222 | ||
223 | return NULL; | |
224 | } | |
225 | ||
226 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ | |
227 | static void __iomem * | |
228 | acpi_map_vaddr_lookup(acpi_physical_address phys, unsigned int size) | |
229 | { | |
230 | struct acpi_ioremap *map; | |
231 | ||
232 | map = acpi_map_lookup(phys, size); | |
233 | if (map) | |
234 | return map->virt + (phys - map->phys); | |
620242ae MS |
235 | |
236 | return NULL; | |
237 | } | |
238 | ||
13606a2d RW |
239 | void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size) |
240 | { | |
241 | struct acpi_ioremap *map; | |
242 | void __iomem *virt = NULL; | |
243 | ||
244 | mutex_lock(&acpi_ioremap_lock); | |
245 | map = acpi_map_lookup(phys, size); | |
246 | if (map) { | |
247 | virt = map->virt + (phys - map->phys); | |
248 | map->refcount++; | |
249 | } | |
250 | mutex_unlock(&acpi_ioremap_lock); | |
251 | return virt; | |
252 | } | |
253 | EXPORT_SYMBOL_GPL(acpi_os_get_iomem); | |
254 | ||
78cdb3ed | 255 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ |
620242ae MS |
256 | static struct acpi_ioremap * |
257 | acpi_map_lookup_virt(void __iomem *virt, acpi_size size) | |
258 | { | |
259 | struct acpi_ioremap *map; | |
260 | ||
78cdb3ed | 261 | list_for_each_entry_rcu(map, &acpi_ioremaps, list) |
4a3cba5e MS |
262 | if (map->virt <= virt && |
263 | virt + size <= map->virt + map->size) | |
620242ae MS |
264 | return map; |
265 | ||
266 | return NULL; | |
267 | } | |
268 | ||
aafc65c7 | 269 | #if defined(CONFIG_IA64) || defined(CONFIG_ARM64) |
ba242d5b MS |
270 | /* ioremap will take care of cache attributes */ |
271 | #define should_use_kmap(pfn) 0 | |
aafc65c7 GG |
272 | #else |
273 | #define should_use_kmap(pfn) page_is_ram(pfn) | |
ba242d5b MS |
274 | #endif |
275 | ||
276 | static void __iomem *acpi_map(acpi_physical_address pg_off, unsigned long pg_sz) | |
277 | { | |
278 | unsigned long pfn; | |
279 | ||
280 | pfn = pg_off >> PAGE_SHIFT; | |
281 | if (should_use_kmap(pfn)) { | |
282 | if (pg_sz > PAGE_SIZE) | |
283 | return NULL; | |
284 | return (void __iomem __force *)kmap(pfn_to_page(pfn)); | |
285 | } else | |
286 | return acpi_os_ioremap(pg_off, pg_sz); | |
287 | } | |
288 | ||
289 | static void acpi_unmap(acpi_physical_address pg_off, void __iomem *vaddr) | |
290 | { | |
291 | unsigned long pfn; | |
292 | ||
293 | pfn = pg_off >> PAGE_SHIFT; | |
e252675f | 294 | if (should_use_kmap(pfn)) |
ba242d5b MS |
295 | kunmap(pfn_to_page(pfn)); |
296 | else | |
297 | iounmap(vaddr); | |
298 | } | |
299 | ||
9d128ed1 RW |
300 | /** |
301 | * acpi_os_map_iomem - Get a virtual address for a given physical address range. | |
302 | * @phys: Start of the physical address range to map. | |
303 | * @size: Size of the physical address range to map. | |
304 | * | |
305 | * Look up the given physical address range in the list of existing ACPI memory | |
306 | * mappings. If found, get a reference to it and return a pointer to it (its | |
307 | * virtual address). If not found, map it, add it to that list and return a | |
308 | * pointer to it. | |
309 | * | |
8d3523fb | 310 | * During early init (when acpi_permanent_mmap has not been set yet) this |
9d128ed1 RW |
311 | * routine simply calls __acpi_map_table() to get the job done. |
312 | */ | |
bd721ea7 | 313 | void __iomem *__ref |
a238317c | 314 | acpi_os_map_iomem(acpi_physical_address phys, acpi_size size) |
1da177e4 | 315 | { |
7ffd0443 | 316 | struct acpi_ioremap *map; |
620242ae | 317 | void __iomem *virt; |
2d6d9fd3 RW |
318 | acpi_physical_address pg_off; |
319 | acpi_size pg_sz; | |
620242ae | 320 | |
9f4fd61f BH |
321 | if (phys > ULONG_MAX) { |
322 | printk(KERN_ERR PREFIX "Cannot map memory that high\n"); | |
70c0846e | 323 | return NULL; |
1da177e4 | 324 | } |
620242ae | 325 | |
8d3523fb | 326 | if (!acpi_permanent_mmap) |
ad71860a | 327 | return __acpi_map_table((unsigned long)phys, size); |
620242ae | 328 | |
7ffd0443 RW |
329 | mutex_lock(&acpi_ioremap_lock); |
330 | /* Check if there's a suitable mapping already. */ | |
331 | map = acpi_map_lookup(phys, size); | |
332 | if (map) { | |
b7c1fadd | 333 | map->refcount++; |
7ffd0443 RW |
334 | goto out; |
335 | } | |
336 | ||
620242ae | 337 | map = kzalloc(sizeof(*map), GFP_KERNEL); |
7ffd0443 RW |
338 | if (!map) { |
339 | mutex_unlock(&acpi_ioremap_lock); | |
620242ae | 340 | return NULL; |
7ffd0443 | 341 | } |
620242ae | 342 | |
4a3cba5e MS |
343 | pg_off = round_down(phys, PAGE_SIZE); |
344 | pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off; | |
ba242d5b | 345 | virt = acpi_map(pg_off, pg_sz); |
620242ae | 346 | if (!virt) { |
7ffd0443 | 347 | mutex_unlock(&acpi_ioremap_lock); |
620242ae MS |
348 | kfree(map); |
349 | return NULL; | |
350 | } | |
351 | ||
352 | INIT_LIST_HEAD(&map->list); | |
353 | map->virt = virt; | |
4a3cba5e MS |
354 | map->phys = pg_off; |
355 | map->size = pg_sz; | |
b7c1fadd | 356 | map->refcount = 1; |
620242ae | 357 | |
78cdb3ed | 358 | list_add_tail_rcu(&map->list, &acpi_ioremaps); |
620242ae | 359 | |
a238317c | 360 | out: |
7ffd0443 | 361 | mutex_unlock(&acpi_ioremap_lock); |
4a3cba5e | 362 | return map->virt + (phys - map->phys); |
1da177e4 | 363 | } |
a238317c LZ |
364 | EXPORT_SYMBOL_GPL(acpi_os_map_iomem); |
365 | ||
bd721ea7 | 366 | void *__ref acpi_os_map_memory(acpi_physical_address phys, acpi_size size) |
a238317c LZ |
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 | * | |
8d3523fb | 396 | * During early init (when acpi_permanent_mmap has not been set yet) this |
9d128ed1 RW |
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 | 404 | |
8d3523fb | 405 | if (!acpi_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 | |
6f68c91c | 430 | int acpi_os_map_generic_address(struct acpi_generic_address *gas) |
29718521 | 431 | { |
bc9ffce2 | 432 | u64 addr; |
29718521 MS |
433 | void __iomem *virt; |
434 | ||
bc9ffce2 | 435 | if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) |
29718521 MS |
436 | return 0; |
437 | ||
bc9ffce2 MS |
438 | /* Handle possible alignment issues */ |
439 | memcpy(&addr, &gas->address, sizeof(addr)); | |
440 | if (!addr || !gas->bit_width) | |
29718521 MS |
441 | return -EINVAL; |
442 | ||
a238317c | 443 | virt = acpi_os_map_iomem(addr, gas->bit_width / 8); |
29718521 MS |
444 | if (!virt) |
445 | return -EIO; | |
446 | ||
447 | return 0; | |
448 | } | |
6f68c91c | 449 | EXPORT_SYMBOL(acpi_os_map_generic_address); |
29718521 | 450 | |
6f68c91c | 451 | void acpi_os_unmap_generic_address(struct acpi_generic_address *gas) |
29718521 | 452 | { |
bc9ffce2 | 453 | u64 addr; |
7fe135dc | 454 | struct acpi_ioremap *map; |
29718521 | 455 | |
bc9ffce2 | 456 | if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) |
29718521 MS |
457 | return; |
458 | ||
bc9ffce2 MS |
459 | /* Handle possible alignment issues */ |
460 | memcpy(&addr, &gas->address, sizeof(addr)); | |
461 | if (!addr || !gas->bit_width) | |
29718521 MS |
462 | return; |
463 | ||
7bbb8903 | 464 | mutex_lock(&acpi_ioremap_lock); |
bc9ffce2 | 465 | map = acpi_map_lookup(addr, gas->bit_width / 8); |
7fe135dc RW |
466 | if (!map) { |
467 | mutex_unlock(&acpi_ioremap_lock); | |
468 | return; | |
469 | } | |
b7c1fadd | 470 | acpi_os_drop_map_ref(map); |
7bbb8903 | 471 | mutex_unlock(&acpi_ioremap_lock); |
29718521 | 472 | |
b7c1fadd | 473 | acpi_os_map_cleanup(map); |
29718521 | 474 | } |
6f68c91c | 475 | EXPORT_SYMBOL(acpi_os_unmap_generic_address); |
29718521 | 476 | |
1da177e4 LT |
477 | #ifdef ACPI_FUTURE_USAGE |
478 | acpi_status | |
4be44fcd | 479 | acpi_os_get_physical_address(void *virt, acpi_physical_address * phys) |
1da177e4 | 480 | { |
4be44fcd | 481 | if (!phys || !virt) |
1da177e4 LT |
482 | return AE_BAD_PARAMETER; |
483 | ||
484 | *phys = virt_to_phys(virt); | |
485 | ||
486 | return AE_OK; | |
487 | } | |
488 | #endif | |
489 | ||
18d78b64 RW |
490 | #ifdef CONFIG_ACPI_REV_OVERRIDE_POSSIBLE |
491 | static bool acpi_rev_override; | |
492 | ||
493 | int __init acpi_rev_override_setup(char *str) | |
494 | { | |
495 | acpi_rev_override = true; | |
496 | return 1; | |
497 | } | |
498 | __setup("acpi_rev_override", acpi_rev_override_setup); | |
499 | #else | |
500 | #define acpi_rev_override false | |
501 | #endif | |
502 | ||
1da177e4 LT |
503 | #define ACPI_MAX_OVERRIDE_LEN 100 |
504 | ||
505 | static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN]; | |
506 | ||
507 | acpi_status | |
4be44fcd | 508 | acpi_os_predefined_override(const struct acpi_predefined_names *init_val, |
80b28810 | 509 | acpi_string *new_val) |
1da177e4 LT |
510 | { |
511 | if (!init_val || !new_val) | |
512 | return AE_BAD_PARAMETER; | |
513 | ||
514 | *new_val = NULL; | |
4be44fcd | 515 | if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) { |
1da177e4 | 516 | printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n", |
4be44fcd | 517 | acpi_os_name); |
1da177e4 LT |
518 | *new_val = acpi_os_name; |
519 | } | |
520 | ||
18d78b64 RW |
521 | if (!memcmp(init_val->name, "_REV", 4) && acpi_rev_override) { |
522 | printk(KERN_INFO PREFIX "Overriding _REV return value to 5\n"); | |
523 | *new_val = (char *)5; | |
524 | } | |
525 | ||
1da177e4 LT |
526 | return AE_OK; |
527 | } | |
528 | ||
7d12e780 | 529 | static irqreturn_t acpi_irq(int irq, void *dev_id) |
1da177e4 | 530 | { |
5229e87d LB |
531 | u32 handled; |
532 | ||
533 | handled = (*acpi_irq_handler) (acpi_irq_context); | |
534 | ||
535 | if (handled) { | |
536 | acpi_irq_handled++; | |
537 | return IRQ_HANDLED; | |
88bea188 LB |
538 | } else { |
539 | acpi_irq_not_handled++; | |
5229e87d | 540 | return IRQ_NONE; |
88bea188 | 541 | } |
1da177e4 LT |
542 | } |
543 | ||
544 | acpi_status | |
4be44fcd LB |
545 | acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler, |
546 | void *context) | |
1da177e4 LT |
547 | { |
548 | unsigned int irq; | |
549 | ||
5229e87d LB |
550 | acpi_irq_stats_init(); |
551 | ||
1da177e4 | 552 | /* |
23fe3630 RW |
553 | * ACPI interrupts different from the SCI in our copy of the FADT are |
554 | * not supported. | |
1da177e4 | 555 | */ |
23fe3630 RW |
556 | if (gsi != acpi_gbl_FADT.sci_interrupt) |
557 | return AE_BAD_PARAMETER; | |
558 | ||
559 | if (acpi_irq_handler) | |
560 | return AE_ALREADY_ACQUIRED; | |
561 | ||
1da177e4 LT |
562 | if (acpi_gsi_to_irq(gsi, &irq) < 0) { |
563 | printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n", | |
564 | gsi); | |
565 | return AE_OK; | |
566 | } | |
567 | ||
568 | acpi_irq_handler = handler; | |
569 | acpi_irq_context = context; | |
a8d46b9e | 570 | if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) { |
1da177e4 | 571 | printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq); |
23fe3630 | 572 | acpi_irq_handler = NULL; |
1da177e4 LT |
573 | return AE_NOT_ACQUIRED; |
574 | } | |
49e4b843 | 575 | acpi_sci_irq = irq; |
1da177e4 LT |
576 | |
577 | return AE_OK; | |
578 | } | |
579 | ||
49e4b843 | 580 | acpi_status acpi_os_remove_interrupt_handler(u32 gsi, acpi_osd_handler handler) |
1da177e4 | 581 | { |
49e4b843 | 582 | if (gsi != acpi_gbl_FADT.sci_interrupt || !acpi_sci_irq_valid()) |
23fe3630 RW |
583 | return AE_BAD_PARAMETER; |
584 | ||
49e4b843 | 585 | free_irq(acpi_sci_irq, acpi_irq); |
23fe3630 | 586 | acpi_irq_handler = NULL; |
49e4b843 | 587 | acpi_sci_irq = INVALID_ACPI_IRQ; |
1da177e4 LT |
588 | |
589 | return AE_OK; | |
590 | } | |
591 | ||
592 | /* | |
593 | * Running in interpreter thread context, safe to sleep | |
594 | */ | |
595 | ||
439913ff | 596 | void acpi_os_sleep(u64 ms) |
1da177e4 | 597 | { |
30282299 | 598 | msleep(ms); |
1da177e4 | 599 | } |
4be44fcd | 600 | |
4be44fcd | 601 | void acpi_os_stall(u32 us) |
1da177e4 LT |
602 | { |
603 | while (us) { | |
604 | u32 delay = 1000; | |
605 | ||
606 | if (delay > us) | |
607 | delay = us; | |
608 | udelay(delay); | |
609 | touch_nmi_watchdog(); | |
610 | us -= delay; | |
611 | } | |
612 | } | |
4be44fcd | 613 | |
1da177e4 LT |
614 | /* |
615 | * Support ACPI 3.0 AML Timer operand | |
616 | * Returns 64-bit free-running, monotonically increasing timer | |
617 | * with 100ns granularity | |
618 | */ | |
4be44fcd | 619 | u64 acpi_os_get_timer(void) |
1da177e4 | 620 | { |
10619066 MW |
621 | u64 time_ns = ktime_to_ns(ktime_get()); |
622 | do_div(time_ns, 100); | |
623 | return time_ns; | |
1da177e4 LT |
624 | } |
625 | ||
4be44fcd | 626 | acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width) |
1da177e4 LT |
627 | { |
628 | u32 dummy; | |
629 | ||
630 | if (!value) | |
631 | value = &dummy; | |
632 | ||
49fbabf5 ZY |
633 | *value = 0; |
634 | if (width <= 8) { | |
4be44fcd | 635 | *(u8 *) value = inb(port); |
49fbabf5 | 636 | } else if (width <= 16) { |
4be44fcd | 637 | *(u16 *) value = inw(port); |
49fbabf5 | 638 | } else if (width <= 32) { |
4be44fcd | 639 | *(u32 *) value = inl(port); |
49fbabf5 | 640 | } else { |
1da177e4 LT |
641 | BUG(); |
642 | } | |
643 | ||
644 | return AE_OK; | |
645 | } | |
4be44fcd | 646 | |
1da177e4 LT |
647 | EXPORT_SYMBOL(acpi_os_read_port); |
648 | ||
4be44fcd | 649 | acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width) |
1da177e4 | 650 | { |
49fbabf5 | 651 | if (width <= 8) { |
1da177e4 | 652 | outb(value, port); |
49fbabf5 | 653 | } else if (width <= 16) { |
1da177e4 | 654 | outw(value, port); |
49fbabf5 | 655 | } else if (width <= 32) { |
1da177e4 | 656 | outl(value, port); |
49fbabf5 | 657 | } else { |
1da177e4 LT |
658 | BUG(); |
659 | } | |
660 | ||
661 | return AE_OK; | |
662 | } | |
4be44fcd | 663 | |
1da177e4 LT |
664 | EXPORT_SYMBOL(acpi_os_write_port); |
665 | ||
e615bf5b | 666 | acpi_status |
653f4b53 | 667 | acpi_os_read_memory(acpi_physical_address phys_addr, u64 *value, u32 width) |
e615bf5b MS |
668 | { |
669 | void __iomem *virt_addr; | |
670 | unsigned int size = width / 8; | |
671 | bool unmap = false; | |
672 | u64 dummy; | |
673 | ||
674 | rcu_read_lock(); | |
675 | virt_addr = acpi_map_vaddr_lookup(phys_addr, size); | |
676 | if (!virt_addr) { | |
677 | rcu_read_unlock(); | |
678 | virt_addr = acpi_os_ioremap(phys_addr, size); | |
679 | if (!virt_addr) | |
680 | return AE_BAD_ADDRESS; | |
681 | unmap = true; | |
682 | } | |
683 | ||
684 | if (!value) | |
685 | value = &dummy; | |
686 | ||
687 | switch (width) { | |
688 | case 8: | |
689 | *(u8 *) value = readb(virt_addr); | |
690 | break; | |
691 | case 16: | |
692 | *(u16 *) value = readw(virt_addr); | |
693 | break; | |
694 | case 32: | |
695 | *(u32 *) value = readl(virt_addr); | |
696 | break; | |
697 | case 64: | |
3277b4ea | 698 | *(u64 *) value = readq(virt_addr); |
e615bf5b MS |
699 | break; |
700 | default: | |
701 | BUG(); | |
702 | } | |
703 | ||
704 | if (unmap) | |
705 | iounmap(virt_addr); | |
706 | else | |
707 | rcu_read_unlock(); | |
708 | ||
709 | return AE_OK; | |
710 | } | |
711 | ||
e615bf5b | 712 | acpi_status |
653f4b53 | 713 | acpi_os_write_memory(acpi_physical_address phys_addr, u64 value, u32 width) |
e615bf5b MS |
714 | { |
715 | void __iomem *virt_addr; | |
716 | unsigned int size = width / 8; | |
717 | bool unmap = false; | |
718 | ||
719 | rcu_read_lock(); | |
720 | virt_addr = acpi_map_vaddr_lookup(phys_addr, size); | |
721 | if (!virt_addr) { | |
722 | rcu_read_unlock(); | |
723 | virt_addr = acpi_os_ioremap(phys_addr, size); | |
724 | if (!virt_addr) | |
725 | return AE_BAD_ADDRESS; | |
726 | unmap = true; | |
727 | } | |
728 | ||
729 | switch (width) { | |
730 | case 8: | |
731 | writeb(value, virt_addr); | |
732 | break; | |
733 | case 16: | |
734 | writew(value, virt_addr); | |
735 | break; | |
736 | case 32: | |
737 | writel(value, virt_addr); | |
738 | break; | |
739 | case 64: | |
3277b4ea | 740 | writeq(value, virt_addr); |
e615bf5b MS |
741 | break; |
742 | default: | |
743 | BUG(); | |
744 | } | |
745 | ||
746 | if (unmap) | |
747 | iounmap(virt_addr); | |
748 | else | |
749 | rcu_read_unlock(); | |
750 | ||
751 | return AE_OK; | |
752 | } | |
753 | ||
1da177e4 | 754 | acpi_status |
4be44fcd | 755 | acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
c5f0231e | 756 | u64 *value, u32 width) |
1da177e4 LT |
757 | { |
758 | int result, size; | |
c5f0231e | 759 | u32 value32; |
1da177e4 LT |
760 | |
761 | if (!value) | |
762 | return AE_BAD_PARAMETER; | |
763 | ||
764 | switch (width) { | |
765 | case 8: | |
766 | size = 1; | |
767 | break; | |
768 | case 16: | |
769 | size = 2; | |
770 | break; | |
771 | case 32: | |
772 | size = 4; | |
773 | break; | |
774 | default: | |
775 | return AE_ERROR; | |
776 | } | |
777 | ||
b6ce068a MW |
778 | result = raw_pci_read(pci_id->segment, pci_id->bus, |
779 | PCI_DEVFN(pci_id->device, pci_id->function), | |
c5f0231e BM |
780 | reg, size, &value32); |
781 | *value = value32; | |
1da177e4 LT |
782 | |
783 | return (result ? AE_ERROR : AE_OK); | |
784 | } | |
4be44fcd | 785 | |
1da177e4 | 786 | acpi_status |
4be44fcd | 787 | acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
439913ff | 788 | u64 value, u32 width) |
1da177e4 LT |
789 | { |
790 | int result, size; | |
791 | ||
792 | switch (width) { | |
793 | case 8: | |
794 | size = 1; | |
795 | break; | |
796 | case 16: | |
797 | size = 2; | |
798 | break; | |
799 | case 32: | |
800 | size = 4; | |
801 | break; | |
802 | default: | |
803 | return AE_ERROR; | |
804 | } | |
805 | ||
b6ce068a MW |
806 | result = raw_pci_write(pci_id->segment, pci_id->bus, |
807 | PCI_DEVFN(pci_id->device, pci_id->function), | |
808 | reg, size, value); | |
1da177e4 LT |
809 | |
810 | return (result ? AE_ERROR : AE_OK); | |
811 | } | |
812 | ||
65f27f38 | 813 | static void acpi_os_execute_deferred(struct work_struct *work) |
88db5e14 AS |
814 | { |
815 | struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work); | |
88db5e14 | 816 | |
19cd847a ZR |
817 | dpc->function(dpc->context); |
818 | kfree(dpc); | |
19cd847a ZR |
819 | } |
820 | ||
836d0830 LZ |
821 | #ifdef CONFIG_ACPI_DEBUGGER |
822 | static struct acpi_debugger acpi_debugger; | |
823 | static bool acpi_debugger_initialized; | |
824 | ||
825 | int acpi_register_debugger(struct module *owner, | |
826 | const struct acpi_debugger_ops *ops) | |
827 | { | |
828 | int ret = 0; | |
829 | ||
830 | mutex_lock(&acpi_debugger.lock); | |
831 | if (acpi_debugger.ops) { | |
832 | ret = -EBUSY; | |
833 | goto err_lock; | |
834 | } | |
835 | ||
836 | acpi_debugger.owner = owner; | |
837 | acpi_debugger.ops = ops; | |
838 | ||
839 | err_lock: | |
840 | mutex_unlock(&acpi_debugger.lock); | |
841 | return ret; | |
842 | } | |
843 | EXPORT_SYMBOL(acpi_register_debugger); | |
844 | ||
845 | void acpi_unregister_debugger(const struct acpi_debugger_ops *ops) | |
846 | { | |
847 | mutex_lock(&acpi_debugger.lock); | |
848 | if (ops == acpi_debugger.ops) { | |
849 | acpi_debugger.ops = NULL; | |
850 | acpi_debugger.owner = NULL; | |
851 | } | |
852 | mutex_unlock(&acpi_debugger.lock); | |
853 | } | |
854 | EXPORT_SYMBOL(acpi_unregister_debugger); | |
855 | ||
856 | int acpi_debugger_create_thread(acpi_osd_exec_callback function, void *context) | |
857 | { | |
858 | int ret; | |
859 | int (*func)(acpi_osd_exec_callback, void *); | |
860 | struct module *owner; | |
861 | ||
862 | if (!acpi_debugger_initialized) | |
863 | return -ENODEV; | |
864 | mutex_lock(&acpi_debugger.lock); | |
865 | if (!acpi_debugger.ops) { | |
866 | ret = -ENODEV; | |
867 | goto err_lock; | |
868 | } | |
869 | if (!try_module_get(acpi_debugger.owner)) { | |
870 | ret = -ENODEV; | |
871 | goto err_lock; | |
872 | } | |
873 | func = acpi_debugger.ops->create_thread; | |
874 | owner = acpi_debugger.owner; | |
875 | mutex_unlock(&acpi_debugger.lock); | |
876 | ||
877 | ret = func(function, context); | |
878 | ||
879 | mutex_lock(&acpi_debugger.lock); | |
880 | module_put(owner); | |
881 | err_lock: | |
882 | mutex_unlock(&acpi_debugger.lock); | |
883 | return ret; | |
884 | } | |
885 | ||
886 | ssize_t acpi_debugger_write_log(const char *msg) | |
887 | { | |
888 | ssize_t ret; | |
889 | ssize_t (*func)(const char *); | |
890 | struct module *owner; | |
891 | ||
892 | if (!acpi_debugger_initialized) | |
893 | return -ENODEV; | |
894 | mutex_lock(&acpi_debugger.lock); | |
895 | if (!acpi_debugger.ops) { | |
896 | ret = -ENODEV; | |
897 | goto err_lock; | |
898 | } | |
899 | if (!try_module_get(acpi_debugger.owner)) { | |
900 | ret = -ENODEV; | |
901 | goto err_lock; | |
902 | } | |
903 | func = acpi_debugger.ops->write_log; | |
904 | owner = acpi_debugger.owner; | |
905 | mutex_unlock(&acpi_debugger.lock); | |
906 | ||
907 | ret = func(msg); | |
908 | ||
909 | mutex_lock(&acpi_debugger.lock); | |
910 | module_put(owner); | |
911 | err_lock: | |
912 | mutex_unlock(&acpi_debugger.lock); | |
913 | return ret; | |
914 | } | |
915 | ||
916 | ssize_t acpi_debugger_read_cmd(char *buffer, size_t buffer_length) | |
917 | { | |
918 | ssize_t ret; | |
919 | ssize_t (*func)(char *, size_t); | |
920 | struct module *owner; | |
921 | ||
922 | if (!acpi_debugger_initialized) | |
923 | return -ENODEV; | |
924 | mutex_lock(&acpi_debugger.lock); | |
925 | if (!acpi_debugger.ops) { | |
926 | ret = -ENODEV; | |
927 | goto err_lock; | |
928 | } | |
929 | if (!try_module_get(acpi_debugger.owner)) { | |
930 | ret = -ENODEV; | |
931 | goto err_lock; | |
932 | } | |
933 | func = acpi_debugger.ops->read_cmd; | |
934 | owner = acpi_debugger.owner; | |
935 | mutex_unlock(&acpi_debugger.lock); | |
936 | ||
937 | ret = func(buffer, buffer_length); | |
938 | ||
939 | mutex_lock(&acpi_debugger.lock); | |
940 | module_put(owner); | |
941 | err_lock: | |
942 | mutex_unlock(&acpi_debugger.lock); | |
943 | return ret; | |
944 | } | |
945 | ||
946 | int acpi_debugger_wait_command_ready(void) | |
947 | { | |
948 | int ret; | |
949 | int (*func)(bool, char *, size_t); | |
950 | struct module *owner; | |
951 | ||
952 | if (!acpi_debugger_initialized) | |
953 | return -ENODEV; | |
954 | mutex_lock(&acpi_debugger.lock); | |
955 | if (!acpi_debugger.ops) { | |
956 | ret = -ENODEV; | |
957 | goto err_lock; | |
958 | } | |
959 | if (!try_module_get(acpi_debugger.owner)) { | |
960 | ret = -ENODEV; | |
961 | goto err_lock; | |
962 | } | |
963 | func = acpi_debugger.ops->wait_command_ready; | |
964 | owner = acpi_debugger.owner; | |
965 | mutex_unlock(&acpi_debugger.lock); | |
966 | ||
967 | ret = func(acpi_gbl_method_executing, | |
968 | acpi_gbl_db_line_buf, ACPI_DB_LINE_BUFFER_SIZE); | |
969 | ||
970 | mutex_lock(&acpi_debugger.lock); | |
971 | module_put(owner); | |
972 | err_lock: | |
973 | mutex_unlock(&acpi_debugger.lock); | |
974 | return ret; | |
975 | } | |
976 | ||
977 | int acpi_debugger_notify_command_complete(void) | |
978 | { | |
979 | int ret; | |
980 | int (*func)(void); | |
981 | struct module *owner; | |
982 | ||
983 | if (!acpi_debugger_initialized) | |
984 | return -ENODEV; | |
985 | mutex_lock(&acpi_debugger.lock); | |
986 | if (!acpi_debugger.ops) { | |
987 | ret = -ENODEV; | |
988 | goto err_lock; | |
989 | } | |
990 | if (!try_module_get(acpi_debugger.owner)) { | |
991 | ret = -ENODEV; | |
992 | goto err_lock; | |
993 | } | |
994 | func = acpi_debugger.ops->notify_command_complete; | |
995 | owner = acpi_debugger.owner; | |
996 | mutex_unlock(&acpi_debugger.lock); | |
997 | ||
998 | ret = func(); | |
999 | ||
1000 | mutex_lock(&acpi_debugger.lock); | |
1001 | module_put(owner); | |
1002 | err_lock: | |
1003 | mutex_unlock(&acpi_debugger.lock); | |
1004 | return ret; | |
1005 | } | |
1006 | ||
1007 | int __init acpi_debugger_init(void) | |
1008 | { | |
1009 | mutex_init(&acpi_debugger.lock); | |
1010 | acpi_debugger_initialized = true; | |
1011 | return 0; | |
1012 | } | |
1013 | #endif | |
1014 | ||
b8d35192 AS |
1015 | /******************************************************************************* |
1016 | * | |
1017 | * FUNCTION: acpi_os_execute | |
1018 | * | |
1019 | * PARAMETERS: Type - Type of the callback | |
1020 | * Function - Function to be executed | |
1021 | * Context - Function parameters | |
1022 | * | |
1023 | * RETURN: Status | |
1024 | * | |
1025 | * DESCRIPTION: Depending on type, either queues function for deferred execution or | |
1026 | * immediately executes function on a separate thread. | |
1027 | * | |
1028 | ******************************************************************************/ | |
1029 | ||
7b98118a RW |
1030 | acpi_status acpi_os_execute(acpi_execute_type type, |
1031 | acpi_osd_exec_callback function, void *context) | |
1da177e4 | 1032 | { |
4be44fcd LB |
1033 | acpi_status status = AE_OK; |
1034 | struct acpi_os_dpc *dpc; | |
17bc54ee | 1035 | struct workqueue_struct *queue; |
19cd847a | 1036 | int ret; |
72945b2b LB |
1037 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
1038 | "Scheduling function [%p(%p)] for deferred execution.\n", | |
1039 | function, context)); | |
1da177e4 | 1040 | |
8cfb0cdf | 1041 | if (type == OSL_DEBUGGER_MAIN_THREAD) { |
836d0830 | 1042 | ret = acpi_debugger_create_thread(function, context); |
8cfb0cdf LZ |
1043 | if (ret) { |
1044 | pr_err("Call to kthread_create() failed.\n"); | |
1045 | status = AE_ERROR; | |
1046 | } | |
1047 | goto out_thread; | |
1048 | } | |
1049 | ||
1da177e4 LT |
1050 | /* |
1051 | * Allocate/initialize DPC structure. Note that this memory will be | |
65f27f38 | 1052 | * freed by the callee. The kernel handles the work_struct list in a |
1da177e4 LT |
1053 | * way that allows us to also free its memory inside the callee. |
1054 | * Because we may want to schedule several tasks with different | |
1055 | * parameters we can't use the approach some kernel code uses of | |
65f27f38 | 1056 | * having a static work_struct. |
1da177e4 | 1057 | */ |
72945b2b | 1058 | |
3ae45a27 | 1059 | dpc = kzalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC); |
1da177e4 | 1060 | if (!dpc) |
889c78be | 1061 | return AE_NO_MEMORY; |
b976fe19 | 1062 | |
1da177e4 LT |
1063 | dpc->function = function; |
1064 | dpc->context = context; | |
b976fe19 | 1065 | |
c02256be | 1066 | /* |
3ae45a27 RW |
1067 | * To prevent lockdep from complaining unnecessarily, make sure that |
1068 | * there is a different static lockdep key for each workqueue by using | |
1069 | * INIT_WORK() for each of them separately. | |
c02256be | 1070 | */ |
7b98118a | 1071 | if (type == OSL_NOTIFY_HANDLER) { |
3ae45a27 | 1072 | queue = kacpi_notify_wq; |
bc73675b | 1073 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); |
8cfb0cdf | 1074 | } else if (type == OSL_GPE_HANDLER) { |
3ae45a27 | 1075 | queue = kacpid_wq; |
bc73675b | 1076 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); |
8cfb0cdf LZ |
1077 | } else { |
1078 | pr_err("Unsupported os_execute type %d.\n", type); | |
1079 | status = AE_ERROR; | |
3ae45a27 | 1080 | } |
bc73675b | 1081 | |
8cfb0cdf LZ |
1082 | if (ACPI_FAILURE(status)) |
1083 | goto err_workqueue; | |
1084 | ||
8fec62b2 TH |
1085 | /* |
1086 | * On some machines, a software-initiated SMI causes corruption unless | |
1087 | * the SMI runs on CPU 0. An SMI can be initiated by any AML, but | |
1088 | * typically it's done in GPE-related methods that are run via | |
1089 | * workqueues, so we can avoid the known corruption cases by always | |
1090 | * queueing on CPU 0. | |
1091 | */ | |
1092 | ret = queue_work_on(0, queue, &dpc->work); | |
19cd847a | 1093 | if (!ret) { |
55ac9a01 LM |
1094 | printk(KERN_ERR PREFIX |
1095 | "Call to queue_work() failed.\n"); | |
17bc54ee | 1096 | status = AE_ERROR; |
1da177e4 | 1097 | } |
8cfb0cdf LZ |
1098 | err_workqueue: |
1099 | if (ACPI_FAILURE(status)) | |
1100 | kfree(dpc); | |
1101 | out_thread: | |
889c78be | 1102 | return status; |
1da177e4 | 1103 | } |
7b98118a | 1104 | EXPORT_SYMBOL(acpi_os_execute); |
4be44fcd | 1105 | |
7b98118a | 1106 | void acpi_os_wait_events_complete(void) |
19cd847a | 1107 | { |
90253a79 LZ |
1108 | /* |
1109 | * Make sure the GPE handler or the fixed event handler is not used | |
1110 | * on another CPU after removal. | |
1111 | */ | |
efb1cf7d CY |
1112 | if (acpi_sci_irq_valid()) |
1113 | synchronize_hardirq(acpi_sci_irq); | |
7b98118a RW |
1114 | flush_workqueue(kacpid_wq); |
1115 | flush_workqueue(kacpi_notify_wq); | |
19cd847a | 1116 | } |
1da177e4 | 1117 | |
7b98118a RW |
1118 | struct acpi_hp_work { |
1119 | struct work_struct work; | |
1e3bcb59 | 1120 | struct acpi_device *adev; |
7b98118a RW |
1121 | u32 src; |
1122 | }; | |
1123 | ||
1124 | static void acpi_hotplug_work_fn(struct work_struct *work) | |
19cd847a | 1125 | { |
7b98118a RW |
1126 | struct acpi_hp_work *hpw = container_of(work, struct acpi_hp_work, work); |
1127 | ||
1128 | acpi_os_wait_events_complete(); | |
1e3bcb59 | 1129 | acpi_device_hotplug(hpw->adev, hpw->src); |
7b98118a | 1130 | kfree(hpw); |
19cd847a ZR |
1131 | } |
1132 | ||
1e3bcb59 | 1133 | acpi_status acpi_hotplug_schedule(struct acpi_device *adev, u32 src) |
1da177e4 | 1134 | { |
7b98118a RW |
1135 | struct acpi_hp_work *hpw; |
1136 | ||
1137 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, | |
1e3bcb59 RW |
1138 | "Scheduling hotplug event (%p, %u) for deferred execution.\n", |
1139 | adev, src)); | |
7b98118a RW |
1140 | |
1141 | hpw = kmalloc(sizeof(*hpw), GFP_KERNEL); | |
1142 | if (!hpw) | |
1143 | return AE_NO_MEMORY; | |
1144 | ||
1145 | INIT_WORK(&hpw->work, acpi_hotplug_work_fn); | |
1e3bcb59 | 1146 | hpw->adev = adev; |
7b98118a RW |
1147 | hpw->src = src; |
1148 | /* | |
1149 | * We can't run hotplug code in kacpid_wq/kacpid_notify_wq etc., because | |
1150 | * the hotplug code may call driver .remove() functions, which may | |
1151 | * invoke flush_scheduled_work()/acpi_os_wait_events_complete() to flush | |
1152 | * these workqueues. | |
1153 | */ | |
1154 | if (!queue_work(kacpi_hotplug_wq, &hpw->work)) { | |
1155 | kfree(hpw); | |
1156 | return AE_ERROR; | |
1157 | } | |
1158 | return AE_OK; | |
1da177e4 | 1159 | } |
4be44fcd | 1160 | |
d783156e RW |
1161 | bool acpi_queue_hotplug_work(struct work_struct *work) |
1162 | { | |
1163 | return queue_work(kacpi_hotplug_wq, work); | |
1164 | } | |
1da177e4 | 1165 | |
1da177e4 | 1166 | acpi_status |
4be44fcd | 1167 | acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle) |
1da177e4 | 1168 | { |
4be44fcd | 1169 | struct semaphore *sem = NULL; |
1da177e4 | 1170 | |
2d0acb4a | 1171 | sem = acpi_os_allocate_zeroed(sizeof(struct semaphore)); |
1da177e4 | 1172 | if (!sem) |
d550d98d | 1173 | return AE_NO_MEMORY; |
1da177e4 LT |
1174 | |
1175 | sema_init(sem, initial_units); | |
1176 | ||
4be44fcd | 1177 | *handle = (acpi_handle *) sem; |
1da177e4 | 1178 | |
4be44fcd LB |
1179 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n", |
1180 | *handle, initial_units)); | |
1da177e4 | 1181 | |
d550d98d | 1182 | return AE_OK; |
1da177e4 | 1183 | } |
1da177e4 | 1184 | |
1da177e4 LT |
1185 | /* |
1186 | * TODO: A better way to delete semaphores? Linux doesn't have a | |
1187 | * 'delete_semaphore()' function -- may result in an invalid | |
1188 | * pointer dereference for non-synchronized consumers. Should | |
1189 | * we at least check for blocked threads and signal/cancel them? | |
1190 | */ | |
1191 | ||
4be44fcd | 1192 | acpi_status acpi_os_delete_semaphore(acpi_handle handle) |
1da177e4 | 1193 | { |
4be44fcd | 1194 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 1195 | |
1da177e4 | 1196 | if (!sem) |
d550d98d | 1197 | return AE_BAD_PARAMETER; |
1da177e4 | 1198 | |
4be44fcd | 1199 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle)); |
1da177e4 | 1200 | |
f1241c87 | 1201 | BUG_ON(!list_empty(&sem->wait_list)); |
02438d87 | 1202 | kfree(sem); |
4be44fcd | 1203 | sem = NULL; |
1da177e4 | 1204 | |
d550d98d | 1205 | return AE_OK; |
1da177e4 | 1206 | } |
1da177e4 | 1207 | |
1da177e4 | 1208 | /* |
1da177e4 LT |
1209 | * TODO: Support for units > 1? |
1210 | */ | |
4be44fcd | 1211 | acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout) |
1da177e4 | 1212 | { |
4be44fcd LB |
1213 | acpi_status status = AE_OK; |
1214 | struct semaphore *sem = (struct semaphore *)handle; | |
f1241c87 | 1215 | long jiffies; |
4be44fcd | 1216 | int ret = 0; |
1da177e4 | 1217 | |
7901a052 LZ |
1218 | if (!acpi_os_initialized) |
1219 | return AE_OK; | |
1220 | ||
1da177e4 | 1221 | if (!sem || (units < 1)) |
d550d98d | 1222 | return AE_BAD_PARAMETER; |
1da177e4 LT |
1223 | |
1224 | if (units > 1) | |
d550d98d | 1225 | return AE_SUPPORT; |
1da177e4 | 1226 | |
4be44fcd LB |
1227 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n", |
1228 | handle, units, timeout)); | |
1da177e4 | 1229 | |
f1241c87 MW |
1230 | if (timeout == ACPI_WAIT_FOREVER) |
1231 | jiffies = MAX_SCHEDULE_TIMEOUT; | |
1232 | else | |
1233 | jiffies = msecs_to_jiffies(timeout); | |
cad1525a | 1234 | |
f1241c87 MW |
1235 | ret = down_timeout(sem, jiffies); |
1236 | if (ret) | |
1237 | status = AE_TIME; | |
1da177e4 LT |
1238 | |
1239 | if (ACPI_FAILURE(status)) { | |
9e7e2c04 | 1240 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, |
a6fc6720 | 1241 | "Failed to acquire semaphore[%p|%d|%d], %s", |
4be44fcd LB |
1242 | handle, units, timeout, |
1243 | acpi_format_exception(status))); | |
1244 | } else { | |
1245 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, | |
a6fc6720 | 1246 | "Acquired semaphore[%p|%d|%d]", handle, |
4be44fcd | 1247 | units, timeout)); |
1da177e4 LT |
1248 | } |
1249 | ||
d550d98d | 1250 | return status; |
1da177e4 | 1251 | } |
1da177e4 | 1252 | |
1da177e4 LT |
1253 | /* |
1254 | * TODO: Support for units > 1? | |
1255 | */ | |
4be44fcd | 1256 | acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units) |
1da177e4 | 1257 | { |
4be44fcd | 1258 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 1259 | |
7901a052 LZ |
1260 | if (!acpi_os_initialized) |
1261 | return AE_OK; | |
1262 | ||
1da177e4 | 1263 | if (!sem || (units < 1)) |
d550d98d | 1264 | return AE_BAD_PARAMETER; |
1da177e4 LT |
1265 | |
1266 | if (units > 1) | |
d550d98d | 1267 | return AE_SUPPORT; |
1da177e4 | 1268 | |
4be44fcd LB |
1269 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle, |
1270 | units)); | |
1da177e4 LT |
1271 | |
1272 | up(sem); | |
1273 | ||
d550d98d | 1274 | return AE_OK; |
1da177e4 | 1275 | } |
4be44fcd | 1276 | |
4d946f79 | 1277 | acpi_status acpi_os_get_line(char *buffer, u32 buffer_length, u32 *bytes_read) |
1da177e4 | 1278 | { |
1da177e4 LT |
1279 | #ifdef ENABLE_DEBUGGER |
1280 | if (acpi_in_debugger) { | |
1281 | u32 chars; | |
1282 | ||
4d946f79 | 1283 | kdb_read(buffer, buffer_length); |
1da177e4 LT |
1284 | |
1285 | /* remove the CR kdb includes */ | |
1286 | chars = strlen(buffer) - 1; | |
1287 | buffer[chars] = '\0'; | |
1288 | } | |
8cfb0cdf LZ |
1289 | #else |
1290 | int ret; | |
1291 | ||
836d0830 | 1292 | ret = acpi_debugger_read_cmd(buffer, buffer_length); |
8cfb0cdf LZ |
1293 | if (ret < 0) |
1294 | return AE_ERROR; | |
1295 | if (bytes_read) | |
1296 | *bytes_read = ret; | |
1da177e4 LT |
1297 | #endif |
1298 | ||
4d946f79 | 1299 | return AE_OK; |
1da177e4 | 1300 | } |
836d0830 | 1301 | EXPORT_SYMBOL(acpi_os_get_line); |
1da177e4 | 1302 | |
8cfb0cdf LZ |
1303 | acpi_status acpi_os_wait_command_ready(void) |
1304 | { | |
1305 | int ret; | |
1306 | ||
836d0830 | 1307 | ret = acpi_debugger_wait_command_ready(); |
8cfb0cdf LZ |
1308 | if (ret < 0) |
1309 | return AE_ERROR; | |
1310 | return AE_OK; | |
1311 | } | |
1312 | ||
1313 | acpi_status acpi_os_notify_command_complete(void) | |
1314 | { | |
1315 | int ret; | |
1316 | ||
836d0830 | 1317 | ret = acpi_debugger_notify_command_complete(); |
8cfb0cdf LZ |
1318 | if (ret < 0) |
1319 | return AE_ERROR; | |
1320 | return AE_OK; | |
1321 | } | |
1322 | ||
4be44fcd | 1323 | acpi_status acpi_os_signal(u32 function, void *info) |
1da177e4 | 1324 | { |
4be44fcd | 1325 | switch (function) { |
1da177e4 LT |
1326 | case ACPI_SIGNAL_FATAL: |
1327 | printk(KERN_ERR PREFIX "Fatal opcode executed\n"); | |
1328 | break; | |
1329 | case ACPI_SIGNAL_BREAKPOINT: | |
1330 | /* | |
1331 | * AML Breakpoint | |
1332 | * ACPI spec. says to treat it as a NOP unless | |
1333 | * you are debugging. So if/when we integrate | |
1334 | * AML debugger into the kernel debugger its | |
1335 | * hook will go here. But until then it is | |
1336 | * not useful to print anything on breakpoints. | |
1337 | */ | |
1338 | break; | |
1339 | default: | |
1340 | break; | |
1341 | } | |
1342 | ||
1343 | return AE_OK; | |
1344 | } | |
4be44fcd | 1345 | |
4be44fcd | 1346 | static int __init acpi_os_name_setup(char *str) |
1da177e4 LT |
1347 | { |
1348 | char *p = acpi_os_name; | |
4be44fcd | 1349 | int count = ACPI_MAX_OVERRIDE_LEN - 1; |
1da177e4 LT |
1350 | |
1351 | if (!str || !*str) | |
1352 | return 0; | |
1353 | ||
5e2be4e0 | 1354 | for (; count-- && *str; str++) { |
1da177e4 LT |
1355 | if (isalnum(*str) || *str == ' ' || *str == ':') |
1356 | *p++ = *str; | |
1357 | else if (*str == '\'' || *str == '"') | |
1358 | continue; | |
1359 | else | |
1360 | break; | |
1361 | } | |
1362 | *p = 0; | |
1363 | ||
1364 | return 1; | |
4be44fcd | 1365 | |
1da177e4 LT |
1366 | } |
1367 | ||
1368 | __setup("acpi_os_name=", acpi_os_name_setup); | |
1369 | ||
22b5afce | 1370 | /* |
08e1d7c0 | 1371 | * Disable the auto-serialization of named objects creation methods. |
22b5afce | 1372 | * |
08e1d7c0 | 1373 | * This feature is enabled by default. It marks the AML control methods |
22b5afce BM |
1374 | * that contain the opcodes to create named objects as "Serialized". |
1375 | */ | |
08e1d7c0 | 1376 | static int __init acpi_no_auto_serialize_setup(char *str) |
1da177e4 | 1377 | { |
08e1d7c0 LZ |
1378 | acpi_gbl_auto_serialize_methods = FALSE; |
1379 | pr_info("ACPI: auto-serialization disabled\n"); | |
1da177e4 LT |
1380 | |
1381 | return 1; | |
1382 | } | |
1383 | ||
08e1d7c0 | 1384 | __setup("acpi_no_auto_serialize", acpi_no_auto_serialize_setup); |
1da177e4 | 1385 | |
df92e695 TR |
1386 | /* Check of resource interference between native drivers and ACPI |
1387 | * OperationRegions (SystemIO and System Memory only). | |
1388 | * IO ports and memory declared in ACPI might be used by the ACPI subsystem | |
1389 | * in arbitrary AML code and can interfere with legacy drivers. | |
1390 | * acpi_enforce_resources= can be set to: | |
1391 | * | |
7e90560c | 1392 | * - strict (default) (2) |
df92e695 | 1393 | * -> further driver trying to access the resources will not load |
7e90560c | 1394 | * - lax (1) |
df92e695 TR |
1395 | * -> further driver trying to access the resources will load, but you |
1396 | * get a system message that something might go wrong... | |
1397 | * | |
1398 | * - no (0) | |
1399 | * -> ACPI Operation Region resources will not be registered | |
1400 | * | |
1401 | */ | |
1402 | #define ENFORCE_RESOURCES_STRICT 2 | |
1403 | #define ENFORCE_RESOURCES_LAX 1 | |
1404 | #define ENFORCE_RESOURCES_NO 0 | |
1405 | ||
7e90560c | 1406 | static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; |
df92e695 TR |
1407 | |
1408 | static int __init acpi_enforce_resources_setup(char *str) | |
1409 | { | |
1410 | if (str == NULL || *str == '\0') | |
1411 | return 0; | |
1412 | ||
1413 | if (!strcmp("strict", str)) | |
1414 | acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; | |
1415 | else if (!strcmp("lax", str)) | |
1416 | acpi_enforce_resources = ENFORCE_RESOURCES_LAX; | |
1417 | else if (!strcmp("no", str)) | |
1418 | acpi_enforce_resources = ENFORCE_RESOURCES_NO; | |
1419 | ||
1420 | return 1; | |
1421 | } | |
1422 | ||
1423 | __setup("acpi_enforce_resources=", acpi_enforce_resources_setup); | |
1424 | ||
1425 | /* Check for resource conflicts between ACPI OperationRegions and native | |
1426 | * drivers */ | |
876fba43 | 1427 | int acpi_check_resource_conflict(const struct resource *res) |
df92e695 | 1428 | { |
f654c0fe LM |
1429 | acpi_adr_space_type space_id; |
1430 | acpi_size length; | |
1431 | u8 warn = 0; | |
1432 | int clash = 0; | |
df92e695 TR |
1433 | |
1434 | if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) | |
1435 | return 0; | |
1436 | if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM)) | |
1437 | return 0; | |
1438 | ||
f654c0fe LM |
1439 | if (res->flags & IORESOURCE_IO) |
1440 | space_id = ACPI_ADR_SPACE_SYSTEM_IO; | |
1441 | else | |
1442 | space_id = ACPI_ADR_SPACE_SYSTEM_MEMORY; | |
df92e695 | 1443 | |
e4f52244 | 1444 | length = resource_size(res); |
f654c0fe LM |
1445 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) |
1446 | warn = 1; | |
1447 | clash = acpi_check_address_range(space_id, res->start, length, warn); | |
df92e695 TR |
1448 | |
1449 | if (clash) { | |
1450 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) { | |
14f03343 JD |
1451 | if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX) |
1452 | printk(KERN_NOTICE "ACPI: This conflict may" | |
1453 | " cause random problems and system" | |
1454 | " instability\n"); | |
1455 | printk(KERN_INFO "ACPI: If an ACPI driver is available" | |
1456 | " for this device, you should use it instead of" | |
1457 | " the native driver\n"); | |
df92e695 TR |
1458 | } |
1459 | if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT) | |
1460 | return -EBUSY; | |
1461 | } | |
1462 | return 0; | |
1463 | } | |
443dea72 | 1464 | EXPORT_SYMBOL(acpi_check_resource_conflict); |
df92e695 TR |
1465 | |
1466 | int acpi_check_region(resource_size_t start, resource_size_t n, | |
1467 | const char *name) | |
1468 | { | |
1469 | struct resource res = { | |
1470 | .start = start, | |
1471 | .end = start + n - 1, | |
1472 | .name = name, | |
1473 | .flags = IORESOURCE_IO, | |
1474 | }; | |
1475 | ||
1476 | return acpi_check_resource_conflict(&res); | |
1477 | } | |
1478 | EXPORT_SYMBOL(acpi_check_region); | |
1479 | ||
70dd6bea JD |
1480 | /* |
1481 | * Let drivers know whether the resource checks are effective | |
1482 | */ | |
1483 | int acpi_resources_are_enforced(void) | |
1484 | { | |
1485 | return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT; | |
1486 | } | |
1487 | EXPORT_SYMBOL(acpi_resources_are_enforced); | |
1488 | ||
9f63b88b LM |
1489 | /* |
1490 | * Deallocate the memory for a spinlock. | |
1491 | */ | |
1492 | void acpi_os_delete_lock(acpi_spinlock handle) | |
1493 | { | |
1494 | ACPI_FREE(handle); | |
1495 | } | |
1496 | ||
73459f73 RM |
1497 | /* |
1498 | * Acquire a spinlock. | |
1499 | * | |
1500 | * handle is a pointer to the spinlock_t. | |
73459f73 RM |
1501 | */ |
1502 | ||
967440e3 | 1503 | acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp) |
73459f73 | 1504 | { |
b8e4d893 | 1505 | acpi_cpu_flags flags; |
967440e3 | 1506 | spin_lock_irqsave(lockp, flags); |
73459f73 RM |
1507 | return flags; |
1508 | } | |
1509 | ||
1510 | /* | |
1511 | * Release a spinlock. See above. | |
1512 | */ | |
1513 | ||
967440e3 | 1514 | void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags) |
73459f73 | 1515 | { |
967440e3 | 1516 | spin_unlock_irqrestore(lockp, flags); |
73459f73 RM |
1517 | } |
1518 | ||
73459f73 RM |
1519 | #ifndef ACPI_USE_LOCAL_CACHE |
1520 | ||
1521 | /******************************************************************************* | |
1522 | * | |
1523 | * FUNCTION: acpi_os_create_cache | |
1524 | * | |
b229cf92 BM |
1525 | * PARAMETERS: name - Ascii name for the cache |
1526 | * size - Size of each cached object | |
1527 | * depth - Maximum depth of the cache (in objects) <ignored> | |
1528 | * cache - Where the new cache object is returned | |
73459f73 | 1529 | * |
b229cf92 | 1530 | * RETURN: status |
73459f73 RM |
1531 | * |
1532 | * DESCRIPTION: Create a cache object | |
1533 | * | |
1534 | ******************************************************************************/ | |
1535 | ||
1536 | acpi_status | |
4be44fcd | 1537 | acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache) |
73459f73 | 1538 | { |
20c2df83 | 1539 | *cache = kmem_cache_create(name, size, 0, 0, NULL); |
a6fdbf90 | 1540 | if (*cache == NULL) |
b229cf92 BM |
1541 | return AE_ERROR; |
1542 | else | |
1543 | return AE_OK; | |
73459f73 RM |
1544 | } |
1545 | ||
1546 | /******************************************************************************* | |
1547 | * | |
1548 | * FUNCTION: acpi_os_purge_cache | |
1549 | * | |
1550 | * PARAMETERS: Cache - Handle to cache object | |
1551 | * | |
1552 | * RETURN: Status | |
1553 | * | |
1554 | * DESCRIPTION: Free all objects within the requested cache. | |
1555 | * | |
1556 | ******************************************************************************/ | |
1557 | ||
4be44fcd | 1558 | acpi_status acpi_os_purge_cache(acpi_cache_t * cache) |
73459f73 | 1559 | { |
50dd0969 | 1560 | kmem_cache_shrink(cache); |
4be44fcd | 1561 | return (AE_OK); |
73459f73 RM |
1562 | } |
1563 | ||
1564 | /******************************************************************************* | |
1565 | * | |
1566 | * FUNCTION: acpi_os_delete_cache | |
1567 | * | |
1568 | * PARAMETERS: Cache - Handle to cache object | |
1569 | * | |
1570 | * RETURN: Status | |
1571 | * | |
1572 | * DESCRIPTION: Free all objects within the requested cache and delete the | |
1573 | * cache object. | |
1574 | * | |
1575 | ******************************************************************************/ | |
1576 | ||
4be44fcd | 1577 | acpi_status acpi_os_delete_cache(acpi_cache_t * cache) |
73459f73 | 1578 | { |
1a1d92c1 | 1579 | kmem_cache_destroy(cache); |
4be44fcd | 1580 | return (AE_OK); |
73459f73 RM |
1581 | } |
1582 | ||
1583 | /******************************************************************************* | |
1584 | * | |
1585 | * FUNCTION: acpi_os_release_object | |
1586 | * | |
1587 | * PARAMETERS: Cache - Handle to cache object | |
1588 | * Object - The object to be released | |
1589 | * | |
1590 | * RETURN: None | |
1591 | * | |
1592 | * DESCRIPTION: Release an object to the specified cache. If cache is full, | |
1593 | * the object is deleted. | |
1594 | * | |
1595 | ******************************************************************************/ | |
1596 | ||
4be44fcd | 1597 | acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object) |
73459f73 | 1598 | { |
4be44fcd LB |
1599 | kmem_cache_free(cache, object); |
1600 | return (AE_OK); | |
73459f73 | 1601 | } |
73459f73 | 1602 | #endif |
d362edaf | 1603 | |
a94e88cd | 1604 | static int __init acpi_no_static_ssdt_setup(char *s) |
b75dd297 | 1605 | { |
a94e88cd LZ |
1606 | acpi_gbl_disable_ssdt_table_install = TRUE; |
1607 | pr_info("ACPI: static SSDT installation disabled\n"); | |
b75dd297 | 1608 | |
a94e88cd | 1609 | return 0; |
b75dd297 LZ |
1610 | } |
1611 | ||
a94e88cd | 1612 | early_param("acpi_no_static_ssdt", acpi_no_static_ssdt_setup); |
b75dd297 | 1613 | |
4dde507f LZ |
1614 | static int __init acpi_disable_return_repair(char *s) |
1615 | { | |
1616 | printk(KERN_NOTICE PREFIX | |
1617 | "ACPI: Predefined validation mechanism disabled\n"); | |
1618 | acpi_gbl_disable_auto_repair = TRUE; | |
1619 | ||
1620 | return 1; | |
1621 | } | |
1622 | ||
1623 | __setup("acpica_no_return_repair", acpi_disable_return_repair); | |
1624 | ||
d362edaf MS |
1625 | acpi_status __init acpi_os_initialize(void) |
1626 | { | |
1627 | acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block); | |
1628 | acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block); | |
1629 | acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block); | |
1630 | acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block); | |
a4714a89 RW |
1631 | if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) { |
1632 | /* | |
1633 | * Use acpi_os_map_generic_address to pre-map the reset | |
1634 | * register if it's in system memory. | |
1635 | */ | |
1636 | int rv; | |
1637 | ||
1638 | rv = acpi_os_map_generic_address(&acpi_gbl_FADT.reset_register); | |
1639 | pr_debug(PREFIX "%s: map reset_reg status %d\n", __func__, rv); | |
1640 | } | |
7901a052 | 1641 | acpi_os_initialized = true; |
d362edaf MS |
1642 | |
1643 | return AE_OK; | |
1644 | } | |
1645 | ||
32d47eef | 1646 | acpi_status __init acpi_os_initialize1(void) |
d362edaf | 1647 | { |
44d2588e TH |
1648 | kacpid_wq = alloc_workqueue("kacpid", 0, 1); |
1649 | kacpi_notify_wq = alloc_workqueue("kacpi_notify", 0, 1); | |
d783156e | 1650 | kacpi_hotplug_wq = alloc_ordered_workqueue("kacpi_hotplug", 0); |
d362edaf MS |
1651 | BUG_ON(!kacpid_wq); |
1652 | BUG_ON(!kacpi_notify_wq); | |
1653 | BUG_ON(!kacpi_hotplug_wq); | |
e5f660eb | 1654 | acpi_osi_init(); |
d362edaf MS |
1655 | return AE_OK; |
1656 | } | |
1657 | ||
1658 | acpi_status acpi_os_terminate(void) | |
1659 | { | |
1660 | if (acpi_irq_handler) { | |
23fe3630 | 1661 | acpi_os_remove_interrupt_handler(acpi_gbl_FADT.sci_interrupt, |
d362edaf MS |
1662 | acpi_irq_handler); |
1663 | } | |
1664 | ||
1665 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe1_block); | |
1666 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block); | |
1667 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block); | |
1668 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block); | |
a4714a89 RW |
1669 | if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) |
1670 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.reset_register); | |
d362edaf MS |
1671 | |
1672 | destroy_workqueue(kacpid_wq); | |
1673 | destroy_workqueue(kacpi_notify_wq); | |
1674 | destroy_workqueue(kacpi_hotplug_wq); | |
1675 | ||
1676 | return AE_OK; | |
1677 | } | |
09f98a82 TL |
1678 | |
1679 | acpi_status acpi_os_prepare_sleep(u8 sleep_state, u32 pm1a_control, | |
1680 | u32 pm1b_control) | |
1681 | { | |
1682 | int rc = 0; | |
1683 | if (__acpi_os_prepare_sleep) | |
1684 | rc = __acpi_os_prepare_sleep(sleep_state, | |
1685 | pm1a_control, pm1b_control); | |
1686 | if (rc < 0) | |
1687 | return AE_ERROR; | |
1688 | else if (rc > 0) | |
0fc5e8f4 | 1689 | return AE_CTRL_TERMINATE; |
09f98a82 TL |
1690 | |
1691 | return AE_OK; | |
1692 | } | |
1693 | ||
1694 | void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state, | |
1695 | u32 pm1a_ctrl, u32 pm1b_ctrl)) | |
1696 | { | |
1697 | __acpi_os_prepare_sleep = func; | |
1698 | } | |
92d8aff3 | 1699 | |
0fc5e8f4 | 1700 | #if (ACPI_REDUCED_HARDWARE) |
d6b47b12 BG |
1701 | acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state, u32 val_a, |
1702 | u32 val_b) | |
1703 | { | |
1704 | int rc = 0; | |
1705 | if (__acpi_os_prepare_extended_sleep) | |
1706 | rc = __acpi_os_prepare_extended_sleep(sleep_state, | |
1707 | val_a, val_b); | |
1708 | if (rc < 0) | |
1709 | return AE_ERROR; | |
1710 | else if (rc > 0) | |
0fc5e8f4 | 1711 | return AE_CTRL_TERMINATE; |
d6b47b12 BG |
1712 | |
1713 | return AE_OK; | |
1714 | } | |
0fc5e8f4 LZ |
1715 | #else |
1716 | acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state, u32 val_a, | |
1717 | u32 val_b) | |
1718 | { | |
1719 | return AE_OK; | |
1720 | } | |
1721 | #endif | |
d6b47b12 BG |
1722 | |
1723 | void acpi_os_set_prepare_extended_sleep(int (*func)(u8 sleep_state, | |
1724 | u32 val_a, u32 val_b)) | |
1725 | { | |
1726 | __acpi_os_prepare_extended_sleep = func; | |
1727 | } | |
0fc5e8f4 LZ |
1728 | |
1729 | acpi_status acpi_os_enter_sleep(u8 sleep_state, | |
1730 | u32 reg_a_value, u32 reg_b_value) | |
1731 | { | |
1732 | acpi_status status; | |
1733 | ||
1734 | if (acpi_gbl_reduced_hardware) | |
1735 | status = acpi_os_prepare_extended_sleep(sleep_state, | |
1736 | reg_a_value, | |
1737 | reg_b_value); | |
1738 | else | |
1739 | status = acpi_os_prepare_sleep(sleep_state, | |
1740 | reg_a_value, reg_b_value); | |
1741 | return status; | |
1742 | } |