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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> | |
1b19d978 | 43 | #include <linux/module.h> |
f1241c87 MW |
44 | |
45 | #include <asm/io.h> | |
7c0f6ba6 | 46 | #include <linux/uaccess.h> |
2f8e2c87 | 47 | #include <linux/io-64-nonatomic-lo-hi.h> |
f1241c87 | 48 | |
1129c92f | 49 | #include "internal.h" |
1da177e4 | 50 | |
1da177e4 | 51 | #define _COMPONENT ACPI_OS_SERVICES |
f52fd66d | 52 | ACPI_MODULE_NAME("osl"); |
07070e12 | 53 | |
4be44fcd LB |
54 | struct acpi_os_dpc { |
55 | acpi_osd_exec_callback function; | |
56 | void *context; | |
65f27f38 | 57 | struct work_struct work; |
1da177e4 LT |
58 | }; |
59 | ||
1da177e4 LT |
60 | #ifdef ENABLE_DEBUGGER |
61 | #include <linux/kdb.h> | |
62 | ||
63 | /* stuff for debugger support */ | |
64 | int acpi_in_debugger; | |
65 | EXPORT_SYMBOL(acpi_in_debugger); | |
4be44fcd | 66 | #endif /*ENABLE_DEBUGGER */ |
1da177e4 | 67 | |
09f98a82 TL |
68 | static int (*__acpi_os_prepare_sleep)(u8 sleep_state, u32 pm1a_ctrl, |
69 | u32 pm1b_ctrl); | |
d6b47b12 BG |
70 | static int (*__acpi_os_prepare_extended_sleep)(u8 sleep_state, u32 val_a, |
71 | u32 val_b); | |
09f98a82 | 72 | |
1da177e4 LT |
73 | static acpi_osd_handler acpi_irq_handler; |
74 | static void *acpi_irq_context; | |
75 | static struct workqueue_struct *kacpid_wq; | |
88db5e14 | 76 | static struct workqueue_struct *kacpi_notify_wq; |
92d8aff3 | 77 | static struct workqueue_struct *kacpi_hotplug_wq; |
7901a052 | 78 | static bool acpi_os_initialized; |
49e4b843 | 79 | unsigned int acpi_sci_irq = INVALID_ACPI_IRQ; |
8d3523fb | 80 | bool acpi_permanent_mmap = false; |
1da177e4 | 81 | |
620242ae MS |
82 | /* |
83 | * This list of permanent mappings is for memory that may be accessed from | |
84 | * interrupt context, where we can't do the ioremap(). | |
85 | */ | |
86 | struct acpi_ioremap { | |
87 | struct list_head list; | |
88 | void __iomem *virt; | |
89 | acpi_physical_address phys; | |
90 | acpi_size size; | |
b7c1fadd | 91 | unsigned long refcount; |
620242ae MS |
92 | }; |
93 | ||
94 | static LIST_HEAD(acpi_ioremaps); | |
7bbb8903 | 95 | static DEFINE_MUTEX(acpi_ioremap_lock); |
620242ae | 96 | |
bc9ffce2 | 97 | static void __init acpi_request_region (struct acpi_generic_address *gas, |
9a47cdb1 BH |
98 | unsigned int length, char *desc) |
99 | { | |
bc9ffce2 MS |
100 | u64 addr; |
101 | ||
102 | /* Handle possible alignment issues */ | |
103 | memcpy(&addr, &gas->address, sizeof(addr)); | |
104 | if (!addr || !length) | |
9a47cdb1 BH |
105 | return; |
106 | ||
0294112e RW |
107 | /* Resources are never freed */ |
108 | if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_IO) | |
109 | request_region(addr, length, desc); | |
110 | else if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) | |
111 | request_mem_region(addr, length, desc); | |
9a47cdb1 BH |
112 | } |
113 | ||
0294112e | 114 | static int __init acpi_reserve_resources(void) |
9a47cdb1 | 115 | { |
eee3c859 | 116 | acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
117 | "ACPI PM1a_EVT_BLK"); |
118 | ||
eee3c859 | 119 | acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
120 | "ACPI PM1b_EVT_BLK"); |
121 | ||
eee3c859 | 122 | acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
123 | "ACPI PM1a_CNT_BLK"); |
124 | ||
eee3c859 | 125 | acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
126 | "ACPI PM1b_CNT_BLK"); |
127 | ||
eee3c859 LB |
128 | if (acpi_gbl_FADT.pm_timer_length == 4) |
129 | acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR"); | |
9a47cdb1 | 130 | |
eee3c859 | 131 | acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length, |
9a47cdb1 BH |
132 | "ACPI PM2_CNT_BLK"); |
133 | ||
134 | /* Length of GPE blocks must be a non-negative multiple of 2 */ | |
135 | ||
eee3c859 LB |
136 | if (!(acpi_gbl_FADT.gpe0_block_length & 0x1)) |
137 | acpi_request_region(&acpi_gbl_FADT.xgpe0_block, | |
138 | acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK"); | |
9a47cdb1 | 139 | |
eee3c859 LB |
140 | if (!(acpi_gbl_FADT.gpe1_block_length & 0x1)) |
141 | acpi_request_region(&acpi_gbl_FADT.xgpe1_block, | |
142 | acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK"); | |
0294112e RW |
143 | |
144 | return 0; | |
9a47cdb1 | 145 | } |
0294112e | 146 | fs_initcall_sync(acpi_reserve_resources); |
9a47cdb1 | 147 | |
4be44fcd | 148 | void acpi_os_printf(const char *fmt, ...) |
1da177e4 LT |
149 | { |
150 | va_list args; | |
151 | va_start(args, fmt); | |
152 | acpi_os_vprintf(fmt, args); | |
153 | va_end(args); | |
154 | } | |
836d0830 | 155 | EXPORT_SYMBOL(acpi_os_printf); |
4be44fcd | 156 | |
4be44fcd | 157 | void acpi_os_vprintf(const char *fmt, va_list args) |
1da177e4 LT |
158 | { |
159 | static char buffer[512]; | |
4be44fcd | 160 | |
1da177e4 LT |
161 | vsprintf(buffer, fmt, args); |
162 | ||
163 | #ifdef ENABLE_DEBUGGER | |
164 | if (acpi_in_debugger) { | |
165 | kdb_printf("%s", buffer); | |
166 | } else { | |
abc4b9a5 JP |
167 | if (printk_get_level(buffer)) |
168 | printk("%s", buffer); | |
169 | else | |
170 | printk(KERN_CONT "%s", buffer); | |
1da177e4 LT |
171 | } |
172 | #else | |
abc4b9a5 JP |
173 | if (acpi_debugger_write_log(buffer) < 0) { |
174 | if (printk_get_level(buffer)) | |
175 | printk("%s", buffer); | |
176 | else | |
177 | printk(KERN_CONT "%s", buffer); | |
178 | } | |
1da177e4 LT |
179 | #endif |
180 | } | |
181 | ||
4996c023 TI |
182 | #ifdef CONFIG_KEXEC |
183 | static unsigned long acpi_rsdp; | |
184 | static int __init setup_acpi_rsdp(char *arg) | |
185 | { | |
5dcb9ca8 | 186 | return kstrtoul(arg, 16, &acpi_rsdp); |
4996c023 TI |
187 | } |
188 | early_param("acpi_rsdp", setup_acpi_rsdp); | |
189 | #endif | |
190 | ||
ad71860a | 191 | acpi_physical_address __init acpi_os_get_root_pointer(void) |
1da177e4 | 192 | { |
2fb65f09 AS |
193 | acpi_physical_address pa = 0; |
194 | ||
4996c023 | 195 | #ifdef CONFIG_KEXEC |
1b19d978 | 196 | if (acpi_rsdp && !secure_modules()) |
4996c023 TI |
197 | return acpi_rsdp; |
198 | #endif | |
199 | ||
83e68189 | 200 | if (efi_enabled(EFI_CONFIG_TABLES)) { |
b2c99e3c | 201 | if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) |
ad71860a | 202 | return efi.acpi20; |
2fb65f09 | 203 | if (efi.acpi != EFI_INVALID_TABLE_ADDR) |
ad71860a | 204 | return efi.acpi; |
2fb65f09 | 205 | pr_err(PREFIX "System description tables not found\n"); |
8a1664be | 206 | } else if (IS_ENABLED(CONFIG_ACPI_LEGACY_TABLES_LOOKUP)) { |
239665a3 | 207 | acpi_find_root_pointer(&pa); |
239665a3 | 208 | } |
8a1664be | 209 | |
2fb65f09 | 210 | return pa; |
1da177e4 LT |
211 | } |
212 | ||
78cdb3ed | 213 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ |
4a3cba5e MS |
214 | static struct acpi_ioremap * |
215 | acpi_map_lookup(acpi_physical_address phys, acpi_size size) | |
620242ae MS |
216 | { |
217 | struct acpi_ioremap *map; | |
218 | ||
78cdb3ed | 219 | list_for_each_entry_rcu(map, &acpi_ioremaps, list) |
620242ae MS |
220 | if (map->phys <= phys && |
221 | phys + size <= map->phys + map->size) | |
4a3cba5e MS |
222 | return map; |
223 | ||
224 | return NULL; | |
225 | } | |
226 | ||
227 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ | |
228 | static void __iomem * | |
229 | acpi_map_vaddr_lookup(acpi_physical_address phys, unsigned int size) | |
230 | { | |
231 | struct acpi_ioremap *map; | |
232 | ||
233 | map = acpi_map_lookup(phys, size); | |
234 | if (map) | |
235 | return map->virt + (phys - map->phys); | |
620242ae MS |
236 | |
237 | return NULL; | |
238 | } | |
239 | ||
13606a2d RW |
240 | void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size) |
241 | { | |
242 | struct acpi_ioremap *map; | |
243 | void __iomem *virt = NULL; | |
244 | ||
245 | mutex_lock(&acpi_ioremap_lock); | |
246 | map = acpi_map_lookup(phys, size); | |
247 | if (map) { | |
248 | virt = map->virt + (phys - map->phys); | |
249 | map->refcount++; | |
250 | } | |
251 | mutex_unlock(&acpi_ioremap_lock); | |
252 | return virt; | |
253 | } | |
254 | EXPORT_SYMBOL_GPL(acpi_os_get_iomem); | |
255 | ||
78cdb3ed | 256 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ |
620242ae MS |
257 | static struct acpi_ioremap * |
258 | acpi_map_lookup_virt(void __iomem *virt, acpi_size size) | |
259 | { | |
260 | struct acpi_ioremap *map; | |
261 | ||
78cdb3ed | 262 | list_for_each_entry_rcu(map, &acpi_ioremaps, list) |
4a3cba5e MS |
263 | if (map->virt <= virt && |
264 | virt + size <= map->virt + map->size) | |
620242ae MS |
265 | return map; |
266 | ||
267 | return NULL; | |
268 | } | |
269 | ||
aafc65c7 | 270 | #if defined(CONFIG_IA64) || defined(CONFIG_ARM64) |
ba242d5b MS |
271 | /* ioremap will take care of cache attributes */ |
272 | #define should_use_kmap(pfn) 0 | |
aafc65c7 GG |
273 | #else |
274 | #define should_use_kmap(pfn) page_is_ram(pfn) | |
ba242d5b MS |
275 | #endif |
276 | ||
277 | static void __iomem *acpi_map(acpi_physical_address pg_off, unsigned long pg_sz) | |
278 | { | |
279 | unsigned long pfn; | |
280 | ||
281 | pfn = pg_off >> PAGE_SHIFT; | |
282 | if (should_use_kmap(pfn)) { | |
283 | if (pg_sz > PAGE_SIZE) | |
284 | return NULL; | |
285 | return (void __iomem __force *)kmap(pfn_to_page(pfn)); | |
286 | } else | |
287 | return acpi_os_ioremap(pg_off, pg_sz); | |
288 | } | |
289 | ||
290 | static void acpi_unmap(acpi_physical_address pg_off, void __iomem *vaddr) | |
291 | { | |
292 | unsigned long pfn; | |
293 | ||
294 | pfn = pg_off >> PAGE_SHIFT; | |
e252675f | 295 | if (should_use_kmap(pfn)) |
ba242d5b MS |
296 | kunmap(pfn_to_page(pfn)); |
297 | else | |
298 | iounmap(vaddr); | |
299 | } | |
300 | ||
9d128ed1 RW |
301 | /** |
302 | * acpi_os_map_iomem - Get a virtual address for a given physical address range. | |
303 | * @phys: Start of the physical address range to map. | |
304 | * @size: Size of the physical address range to map. | |
305 | * | |
306 | * Look up the given physical address range in the list of existing ACPI memory | |
307 | * mappings. If found, get a reference to it and return a pointer to it (its | |
308 | * virtual address). If not found, map it, add it to that list and return a | |
309 | * pointer to it. | |
310 | * | |
8d3523fb | 311 | * During early init (when acpi_permanent_mmap has not been set yet) this |
9d128ed1 RW |
312 | * routine simply calls __acpi_map_table() to get the job done. |
313 | */ | |
bd721ea7 | 314 | void __iomem *__ref |
a238317c | 315 | acpi_os_map_iomem(acpi_physical_address phys, acpi_size size) |
1da177e4 | 316 | { |
7ffd0443 | 317 | struct acpi_ioremap *map; |
620242ae | 318 | void __iomem *virt; |
2d6d9fd3 RW |
319 | acpi_physical_address pg_off; |
320 | acpi_size pg_sz; | |
620242ae | 321 | |
9f4fd61f BH |
322 | if (phys > ULONG_MAX) { |
323 | printk(KERN_ERR PREFIX "Cannot map memory that high\n"); | |
70c0846e | 324 | return NULL; |
1da177e4 | 325 | } |
620242ae | 326 | |
8d3523fb | 327 | if (!acpi_permanent_mmap) |
ad71860a | 328 | return __acpi_map_table((unsigned long)phys, size); |
620242ae | 329 | |
7ffd0443 RW |
330 | mutex_lock(&acpi_ioremap_lock); |
331 | /* Check if there's a suitable mapping already. */ | |
332 | map = acpi_map_lookup(phys, size); | |
333 | if (map) { | |
b7c1fadd | 334 | map->refcount++; |
7ffd0443 RW |
335 | goto out; |
336 | } | |
337 | ||
620242ae | 338 | map = kzalloc(sizeof(*map), GFP_KERNEL); |
7ffd0443 RW |
339 | if (!map) { |
340 | mutex_unlock(&acpi_ioremap_lock); | |
620242ae | 341 | return NULL; |
7ffd0443 | 342 | } |
620242ae | 343 | |
4a3cba5e MS |
344 | pg_off = round_down(phys, PAGE_SIZE); |
345 | pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off; | |
ba242d5b | 346 | virt = acpi_map(pg_off, pg_sz); |
620242ae | 347 | if (!virt) { |
7ffd0443 | 348 | mutex_unlock(&acpi_ioremap_lock); |
620242ae MS |
349 | kfree(map); |
350 | return NULL; | |
351 | } | |
352 | ||
353 | INIT_LIST_HEAD(&map->list); | |
354 | map->virt = virt; | |
4a3cba5e MS |
355 | map->phys = pg_off; |
356 | map->size = pg_sz; | |
b7c1fadd | 357 | map->refcount = 1; |
620242ae | 358 | |
78cdb3ed | 359 | list_add_tail_rcu(&map->list, &acpi_ioremaps); |
620242ae | 360 | |
a238317c | 361 | out: |
7ffd0443 | 362 | mutex_unlock(&acpi_ioremap_lock); |
4a3cba5e | 363 | return map->virt + (phys - map->phys); |
1da177e4 | 364 | } |
a238317c LZ |
365 | EXPORT_SYMBOL_GPL(acpi_os_map_iomem); |
366 | ||
bd721ea7 | 367 | void *__ref acpi_os_map_memory(acpi_physical_address phys, acpi_size size) |
a238317c LZ |
368 | { |
369 | return (void *)acpi_os_map_iomem(phys, size); | |
370 | } | |
55a82ab3 | 371 | EXPORT_SYMBOL_GPL(acpi_os_map_memory); |
1da177e4 | 372 | |
b7c1fadd | 373 | static void acpi_os_drop_map_ref(struct acpi_ioremap *map) |
4a3cba5e | 374 | { |
b7c1fadd RW |
375 | if (!--map->refcount) |
376 | list_del_rcu(&map->list); | |
4a3cba5e | 377 | } |
4a3cba5e | 378 | |
b7c1fadd | 379 | static void acpi_os_map_cleanup(struct acpi_ioremap *map) |
7fe135dc | 380 | { |
b7c1fadd | 381 | if (!map->refcount) { |
74b51ee1 | 382 | synchronize_rcu_expedited(); |
ba242d5b | 383 | acpi_unmap(map->phys, map->virt); |
b7c1fadd RW |
384 | kfree(map); |
385 | } | |
4a3cba5e MS |
386 | } |
387 | ||
9d128ed1 RW |
388 | /** |
389 | * acpi_os_unmap_iomem - Drop a memory mapping reference. | |
390 | * @virt: Start of the address range to drop a reference to. | |
391 | * @size: Size of the address range to drop a reference to. | |
392 | * | |
393 | * Look up the given virtual address range in the list of existing ACPI memory | |
394 | * mappings, drop a reference to it and unmap it if there are no more active | |
395 | * references to it. | |
396 | * | |
8d3523fb | 397 | * During early init (when acpi_permanent_mmap has not been set yet) this |
9d128ed1 RW |
398 | * routine simply calls __acpi_unmap_table() to get the job done. Since |
399 | * __acpi_unmap_table() is an __init function, the __ref annotation is needed | |
400 | * here. | |
401 | */ | |
a238317c | 402 | void __ref acpi_os_unmap_iomem(void __iomem *virt, acpi_size size) |
1da177e4 | 403 | { |
620242ae | 404 | struct acpi_ioremap *map; |
620242ae | 405 | |
8d3523fb | 406 | if (!acpi_permanent_mmap) { |
7d97277b | 407 | __acpi_unmap_table(virt, size); |
620242ae MS |
408 | return; |
409 | } | |
410 | ||
7bbb8903 | 411 | mutex_lock(&acpi_ioremap_lock); |
620242ae MS |
412 | map = acpi_map_lookup_virt(virt, size); |
413 | if (!map) { | |
7bbb8903 | 414 | mutex_unlock(&acpi_ioremap_lock); |
7fe135dc | 415 | WARN(true, PREFIX "%s: bad address %p\n", __func__, virt); |
620242ae MS |
416 | return; |
417 | } | |
b7c1fadd | 418 | acpi_os_drop_map_ref(map); |
7bbb8903 | 419 | mutex_unlock(&acpi_ioremap_lock); |
620242ae | 420 | |
b7c1fadd | 421 | acpi_os_map_cleanup(map); |
1da177e4 | 422 | } |
a238317c LZ |
423 | EXPORT_SYMBOL_GPL(acpi_os_unmap_iomem); |
424 | ||
425 | void __ref acpi_os_unmap_memory(void *virt, acpi_size size) | |
426 | { | |
427 | return acpi_os_unmap_iomem((void __iomem *)virt, size); | |
428 | } | |
55a82ab3 | 429 | EXPORT_SYMBOL_GPL(acpi_os_unmap_memory); |
1da177e4 | 430 | |
6f68c91c | 431 | int acpi_os_map_generic_address(struct acpi_generic_address *gas) |
29718521 | 432 | { |
bc9ffce2 | 433 | u64 addr; |
29718521 MS |
434 | void __iomem *virt; |
435 | ||
bc9ffce2 | 436 | if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) |
29718521 MS |
437 | return 0; |
438 | ||
bc9ffce2 MS |
439 | /* Handle possible alignment issues */ |
440 | memcpy(&addr, &gas->address, sizeof(addr)); | |
441 | if (!addr || !gas->bit_width) | |
29718521 MS |
442 | return -EINVAL; |
443 | ||
a238317c | 444 | virt = acpi_os_map_iomem(addr, gas->bit_width / 8); |
29718521 MS |
445 | if (!virt) |
446 | return -EIO; | |
447 | ||
448 | return 0; | |
449 | } | |
6f68c91c | 450 | EXPORT_SYMBOL(acpi_os_map_generic_address); |
29718521 | 451 | |
6f68c91c | 452 | void acpi_os_unmap_generic_address(struct acpi_generic_address *gas) |
29718521 | 453 | { |
bc9ffce2 | 454 | u64 addr; |
7fe135dc | 455 | struct acpi_ioremap *map; |
29718521 | 456 | |
bc9ffce2 | 457 | if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) |
29718521 MS |
458 | return; |
459 | ||
bc9ffce2 MS |
460 | /* Handle possible alignment issues */ |
461 | memcpy(&addr, &gas->address, sizeof(addr)); | |
462 | if (!addr || !gas->bit_width) | |
29718521 MS |
463 | return; |
464 | ||
7bbb8903 | 465 | mutex_lock(&acpi_ioremap_lock); |
bc9ffce2 | 466 | map = acpi_map_lookup(addr, gas->bit_width / 8); |
7fe135dc RW |
467 | if (!map) { |
468 | mutex_unlock(&acpi_ioremap_lock); | |
469 | return; | |
470 | } | |
b7c1fadd | 471 | acpi_os_drop_map_ref(map); |
7bbb8903 | 472 | mutex_unlock(&acpi_ioremap_lock); |
29718521 | 473 | |
b7c1fadd | 474 | acpi_os_map_cleanup(map); |
29718521 | 475 | } |
6f68c91c | 476 | EXPORT_SYMBOL(acpi_os_unmap_generic_address); |
29718521 | 477 | |
1da177e4 LT |
478 | #ifdef ACPI_FUTURE_USAGE |
479 | acpi_status | |
4be44fcd | 480 | acpi_os_get_physical_address(void *virt, acpi_physical_address * phys) |
1da177e4 | 481 | { |
4be44fcd | 482 | if (!phys || !virt) |
1da177e4 LT |
483 | return AE_BAD_PARAMETER; |
484 | ||
485 | *phys = virt_to_phys(virt); | |
486 | ||
487 | return AE_OK; | |
488 | } | |
489 | #endif | |
490 | ||
18d78b64 RW |
491 | #ifdef CONFIG_ACPI_REV_OVERRIDE_POSSIBLE |
492 | static bool acpi_rev_override; | |
493 | ||
494 | int __init acpi_rev_override_setup(char *str) | |
495 | { | |
496 | acpi_rev_override = true; | |
497 | return 1; | |
498 | } | |
499 | __setup("acpi_rev_override", acpi_rev_override_setup); | |
500 | #else | |
501 | #define acpi_rev_override false | |
502 | #endif | |
503 | ||
1da177e4 LT |
504 | #define ACPI_MAX_OVERRIDE_LEN 100 |
505 | ||
506 | static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN]; | |
507 | ||
508 | acpi_status | |
4be44fcd | 509 | acpi_os_predefined_override(const struct acpi_predefined_names *init_val, |
80b28810 | 510 | acpi_string *new_val) |
1da177e4 LT |
511 | { |
512 | if (!init_val || !new_val) | |
513 | return AE_BAD_PARAMETER; | |
514 | ||
515 | *new_val = NULL; | |
4be44fcd | 516 | if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) { |
1da177e4 | 517 | printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n", |
4be44fcd | 518 | acpi_os_name); |
1da177e4 LT |
519 | *new_val = acpi_os_name; |
520 | } | |
521 | ||
18d78b64 RW |
522 | if (!memcmp(init_val->name, "_REV", 4) && acpi_rev_override) { |
523 | printk(KERN_INFO PREFIX "Overriding _REV return value to 5\n"); | |
524 | *new_val = (char *)5; | |
525 | } | |
526 | ||
1da177e4 LT |
527 | return AE_OK; |
528 | } | |
529 | ||
7d12e780 | 530 | static irqreturn_t acpi_irq(int irq, void *dev_id) |
1da177e4 | 531 | { |
5229e87d LB |
532 | u32 handled; |
533 | ||
534 | handled = (*acpi_irq_handler) (acpi_irq_context); | |
535 | ||
536 | if (handled) { | |
537 | acpi_irq_handled++; | |
538 | return IRQ_HANDLED; | |
88bea188 LB |
539 | } else { |
540 | acpi_irq_not_handled++; | |
5229e87d | 541 | return IRQ_NONE; |
88bea188 | 542 | } |
1da177e4 LT |
543 | } |
544 | ||
545 | acpi_status | |
4be44fcd LB |
546 | acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler, |
547 | void *context) | |
1da177e4 LT |
548 | { |
549 | unsigned int irq; | |
550 | ||
5229e87d LB |
551 | acpi_irq_stats_init(); |
552 | ||
1da177e4 | 553 | /* |
23fe3630 RW |
554 | * ACPI interrupts different from the SCI in our copy of the FADT are |
555 | * not supported. | |
1da177e4 | 556 | */ |
23fe3630 RW |
557 | if (gsi != acpi_gbl_FADT.sci_interrupt) |
558 | return AE_BAD_PARAMETER; | |
559 | ||
560 | if (acpi_irq_handler) | |
561 | return AE_ALREADY_ACQUIRED; | |
562 | ||
1da177e4 LT |
563 | if (acpi_gsi_to_irq(gsi, &irq) < 0) { |
564 | printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n", | |
565 | gsi); | |
566 | return AE_OK; | |
567 | } | |
568 | ||
569 | acpi_irq_handler = handler; | |
570 | acpi_irq_context = context; | |
a8d46b9e | 571 | if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) { |
1da177e4 | 572 | printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq); |
23fe3630 | 573 | acpi_irq_handler = NULL; |
1da177e4 LT |
574 | return AE_NOT_ACQUIRED; |
575 | } | |
49e4b843 | 576 | acpi_sci_irq = irq; |
1da177e4 LT |
577 | |
578 | return AE_OK; | |
579 | } | |
580 | ||
49e4b843 | 581 | acpi_status acpi_os_remove_interrupt_handler(u32 gsi, acpi_osd_handler handler) |
1da177e4 | 582 | { |
49e4b843 | 583 | if (gsi != acpi_gbl_FADT.sci_interrupt || !acpi_sci_irq_valid()) |
23fe3630 RW |
584 | return AE_BAD_PARAMETER; |
585 | ||
49e4b843 | 586 | free_irq(acpi_sci_irq, acpi_irq); |
23fe3630 | 587 | acpi_irq_handler = NULL; |
49e4b843 | 588 | acpi_sci_irq = INVALID_ACPI_IRQ; |
1da177e4 LT |
589 | |
590 | return AE_OK; | |
591 | } | |
592 | ||
593 | /* | |
594 | * Running in interpreter thread context, safe to sleep | |
595 | */ | |
596 | ||
439913ff | 597 | void acpi_os_sleep(u64 ms) |
1da177e4 | 598 | { |
30282299 | 599 | msleep(ms); |
1da177e4 | 600 | } |
4be44fcd | 601 | |
4be44fcd | 602 | void acpi_os_stall(u32 us) |
1da177e4 LT |
603 | { |
604 | while (us) { | |
605 | u32 delay = 1000; | |
606 | ||
607 | if (delay > us) | |
608 | delay = us; | |
609 | udelay(delay); | |
610 | touch_nmi_watchdog(); | |
611 | us -= delay; | |
612 | } | |
613 | } | |
4be44fcd | 614 | |
1da177e4 LT |
615 | /* |
616 | * Support ACPI 3.0 AML Timer operand | |
617 | * Returns 64-bit free-running, monotonically increasing timer | |
618 | * with 100ns granularity | |
619 | */ | |
4be44fcd | 620 | u64 acpi_os_get_timer(void) |
1da177e4 | 621 | { |
10619066 MW |
622 | u64 time_ns = ktime_to_ns(ktime_get()); |
623 | do_div(time_ns, 100); | |
624 | return time_ns; | |
1da177e4 LT |
625 | } |
626 | ||
4be44fcd | 627 | acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width) |
1da177e4 LT |
628 | { |
629 | u32 dummy; | |
630 | ||
631 | if (!value) | |
632 | value = &dummy; | |
633 | ||
49fbabf5 ZY |
634 | *value = 0; |
635 | if (width <= 8) { | |
4be44fcd | 636 | *(u8 *) value = inb(port); |
49fbabf5 | 637 | } else if (width <= 16) { |
4be44fcd | 638 | *(u16 *) value = inw(port); |
49fbabf5 | 639 | } else if (width <= 32) { |
4be44fcd | 640 | *(u32 *) value = inl(port); |
49fbabf5 | 641 | } else { |
1da177e4 LT |
642 | BUG(); |
643 | } | |
644 | ||
645 | return AE_OK; | |
646 | } | |
4be44fcd | 647 | |
1da177e4 LT |
648 | EXPORT_SYMBOL(acpi_os_read_port); |
649 | ||
4be44fcd | 650 | acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width) |
1da177e4 | 651 | { |
49fbabf5 | 652 | if (width <= 8) { |
1da177e4 | 653 | outb(value, port); |
49fbabf5 | 654 | } else if (width <= 16) { |
1da177e4 | 655 | outw(value, port); |
49fbabf5 | 656 | } else if (width <= 32) { |
1da177e4 | 657 | outl(value, port); |
49fbabf5 | 658 | } else { |
1da177e4 LT |
659 | BUG(); |
660 | } | |
661 | ||
662 | return AE_OK; | |
663 | } | |
4be44fcd | 664 | |
1da177e4 LT |
665 | EXPORT_SYMBOL(acpi_os_write_port); |
666 | ||
e615bf5b | 667 | acpi_status |
653f4b53 | 668 | acpi_os_read_memory(acpi_physical_address phys_addr, u64 *value, u32 width) |
e615bf5b MS |
669 | { |
670 | void __iomem *virt_addr; | |
671 | unsigned int size = width / 8; | |
672 | bool unmap = false; | |
673 | u64 dummy; | |
674 | ||
675 | rcu_read_lock(); | |
676 | virt_addr = acpi_map_vaddr_lookup(phys_addr, size); | |
677 | if (!virt_addr) { | |
678 | rcu_read_unlock(); | |
679 | virt_addr = acpi_os_ioremap(phys_addr, size); | |
680 | if (!virt_addr) | |
681 | return AE_BAD_ADDRESS; | |
682 | unmap = true; | |
683 | } | |
684 | ||
685 | if (!value) | |
686 | value = &dummy; | |
687 | ||
688 | switch (width) { | |
689 | case 8: | |
690 | *(u8 *) value = readb(virt_addr); | |
691 | break; | |
692 | case 16: | |
693 | *(u16 *) value = readw(virt_addr); | |
694 | break; | |
695 | case 32: | |
696 | *(u32 *) value = readl(virt_addr); | |
697 | break; | |
698 | case 64: | |
3277b4ea | 699 | *(u64 *) value = readq(virt_addr); |
e615bf5b MS |
700 | break; |
701 | default: | |
702 | BUG(); | |
703 | } | |
704 | ||
705 | if (unmap) | |
706 | iounmap(virt_addr); | |
707 | else | |
708 | rcu_read_unlock(); | |
709 | ||
710 | return AE_OK; | |
711 | } | |
712 | ||
e615bf5b | 713 | acpi_status |
653f4b53 | 714 | acpi_os_write_memory(acpi_physical_address phys_addr, u64 value, u32 width) |
e615bf5b MS |
715 | { |
716 | void __iomem *virt_addr; | |
717 | unsigned int size = width / 8; | |
718 | bool unmap = false; | |
719 | ||
720 | rcu_read_lock(); | |
721 | virt_addr = acpi_map_vaddr_lookup(phys_addr, size); | |
722 | if (!virt_addr) { | |
723 | rcu_read_unlock(); | |
724 | virt_addr = acpi_os_ioremap(phys_addr, size); | |
725 | if (!virt_addr) | |
726 | return AE_BAD_ADDRESS; | |
727 | unmap = true; | |
728 | } | |
729 | ||
730 | switch (width) { | |
731 | case 8: | |
732 | writeb(value, virt_addr); | |
733 | break; | |
734 | case 16: | |
735 | writew(value, virt_addr); | |
736 | break; | |
737 | case 32: | |
738 | writel(value, virt_addr); | |
739 | break; | |
740 | case 64: | |
3277b4ea | 741 | writeq(value, virt_addr); |
e615bf5b MS |
742 | break; |
743 | default: | |
744 | BUG(); | |
745 | } | |
746 | ||
747 | if (unmap) | |
748 | iounmap(virt_addr); | |
749 | else | |
750 | rcu_read_unlock(); | |
751 | ||
752 | return AE_OK; | |
753 | } | |
754 | ||
1da177e4 | 755 | acpi_status |
4be44fcd | 756 | acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
c5f0231e | 757 | u64 *value, u32 width) |
1da177e4 LT |
758 | { |
759 | int result, size; | |
c5f0231e | 760 | u32 value32; |
1da177e4 LT |
761 | |
762 | if (!value) | |
763 | return AE_BAD_PARAMETER; | |
764 | ||
765 | switch (width) { | |
766 | case 8: | |
767 | size = 1; | |
768 | break; | |
769 | case 16: | |
770 | size = 2; | |
771 | break; | |
772 | case 32: | |
773 | size = 4; | |
774 | break; | |
775 | default: | |
776 | return AE_ERROR; | |
777 | } | |
778 | ||
b6ce068a MW |
779 | result = raw_pci_read(pci_id->segment, pci_id->bus, |
780 | PCI_DEVFN(pci_id->device, pci_id->function), | |
c5f0231e BM |
781 | reg, size, &value32); |
782 | *value = value32; | |
1da177e4 LT |
783 | |
784 | return (result ? AE_ERROR : AE_OK); | |
785 | } | |
4be44fcd | 786 | |
1da177e4 | 787 | acpi_status |
4be44fcd | 788 | acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
439913ff | 789 | u64 value, u32 width) |
1da177e4 LT |
790 | { |
791 | int result, size; | |
792 | ||
793 | switch (width) { | |
794 | case 8: | |
795 | size = 1; | |
796 | break; | |
797 | case 16: | |
798 | size = 2; | |
799 | break; | |
800 | case 32: | |
801 | size = 4; | |
802 | break; | |
803 | default: | |
804 | return AE_ERROR; | |
805 | } | |
806 | ||
b6ce068a MW |
807 | result = raw_pci_write(pci_id->segment, pci_id->bus, |
808 | PCI_DEVFN(pci_id->device, pci_id->function), | |
809 | reg, size, value); | |
1da177e4 LT |
810 | |
811 | return (result ? AE_ERROR : AE_OK); | |
812 | } | |
813 | ||
65f27f38 | 814 | static void acpi_os_execute_deferred(struct work_struct *work) |
88db5e14 AS |
815 | { |
816 | struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work); | |
88db5e14 | 817 | |
19cd847a ZR |
818 | dpc->function(dpc->context); |
819 | kfree(dpc); | |
19cd847a ZR |
820 | } |
821 | ||
836d0830 LZ |
822 | #ifdef CONFIG_ACPI_DEBUGGER |
823 | static struct acpi_debugger acpi_debugger; | |
824 | static bool acpi_debugger_initialized; | |
825 | ||
826 | int acpi_register_debugger(struct module *owner, | |
827 | const struct acpi_debugger_ops *ops) | |
828 | { | |
829 | int ret = 0; | |
830 | ||
831 | mutex_lock(&acpi_debugger.lock); | |
832 | if (acpi_debugger.ops) { | |
833 | ret = -EBUSY; | |
834 | goto err_lock; | |
835 | } | |
836 | ||
837 | acpi_debugger.owner = owner; | |
838 | acpi_debugger.ops = ops; | |
839 | ||
840 | err_lock: | |
841 | mutex_unlock(&acpi_debugger.lock); | |
842 | return ret; | |
843 | } | |
844 | EXPORT_SYMBOL(acpi_register_debugger); | |
845 | ||
846 | void acpi_unregister_debugger(const struct acpi_debugger_ops *ops) | |
847 | { | |
848 | mutex_lock(&acpi_debugger.lock); | |
849 | if (ops == acpi_debugger.ops) { | |
850 | acpi_debugger.ops = NULL; | |
851 | acpi_debugger.owner = NULL; | |
852 | } | |
853 | mutex_unlock(&acpi_debugger.lock); | |
854 | } | |
855 | EXPORT_SYMBOL(acpi_unregister_debugger); | |
856 | ||
857 | int acpi_debugger_create_thread(acpi_osd_exec_callback function, void *context) | |
858 | { | |
859 | int ret; | |
860 | int (*func)(acpi_osd_exec_callback, void *); | |
861 | struct module *owner; | |
862 | ||
863 | if (!acpi_debugger_initialized) | |
864 | return -ENODEV; | |
865 | mutex_lock(&acpi_debugger.lock); | |
866 | if (!acpi_debugger.ops) { | |
867 | ret = -ENODEV; | |
868 | goto err_lock; | |
869 | } | |
870 | if (!try_module_get(acpi_debugger.owner)) { | |
871 | ret = -ENODEV; | |
872 | goto err_lock; | |
873 | } | |
874 | func = acpi_debugger.ops->create_thread; | |
875 | owner = acpi_debugger.owner; | |
876 | mutex_unlock(&acpi_debugger.lock); | |
877 | ||
878 | ret = func(function, context); | |
879 | ||
880 | mutex_lock(&acpi_debugger.lock); | |
881 | module_put(owner); | |
882 | err_lock: | |
883 | mutex_unlock(&acpi_debugger.lock); | |
884 | return ret; | |
885 | } | |
886 | ||
887 | ssize_t acpi_debugger_write_log(const char *msg) | |
888 | { | |
889 | ssize_t ret; | |
890 | ssize_t (*func)(const char *); | |
891 | struct module *owner; | |
892 | ||
893 | if (!acpi_debugger_initialized) | |
894 | return -ENODEV; | |
895 | mutex_lock(&acpi_debugger.lock); | |
896 | if (!acpi_debugger.ops) { | |
897 | ret = -ENODEV; | |
898 | goto err_lock; | |
899 | } | |
900 | if (!try_module_get(acpi_debugger.owner)) { | |
901 | ret = -ENODEV; | |
902 | goto err_lock; | |
903 | } | |
904 | func = acpi_debugger.ops->write_log; | |
905 | owner = acpi_debugger.owner; | |
906 | mutex_unlock(&acpi_debugger.lock); | |
907 | ||
908 | ret = func(msg); | |
909 | ||
910 | mutex_lock(&acpi_debugger.lock); | |
911 | module_put(owner); | |
912 | err_lock: | |
913 | mutex_unlock(&acpi_debugger.lock); | |
914 | return ret; | |
915 | } | |
916 | ||
917 | ssize_t acpi_debugger_read_cmd(char *buffer, size_t buffer_length) | |
918 | { | |
919 | ssize_t ret; | |
920 | ssize_t (*func)(char *, size_t); | |
921 | struct module *owner; | |
922 | ||
923 | if (!acpi_debugger_initialized) | |
924 | return -ENODEV; | |
925 | mutex_lock(&acpi_debugger.lock); | |
926 | if (!acpi_debugger.ops) { | |
927 | ret = -ENODEV; | |
928 | goto err_lock; | |
929 | } | |
930 | if (!try_module_get(acpi_debugger.owner)) { | |
931 | ret = -ENODEV; | |
932 | goto err_lock; | |
933 | } | |
934 | func = acpi_debugger.ops->read_cmd; | |
935 | owner = acpi_debugger.owner; | |
936 | mutex_unlock(&acpi_debugger.lock); | |
937 | ||
938 | ret = func(buffer, buffer_length); | |
939 | ||
940 | mutex_lock(&acpi_debugger.lock); | |
941 | module_put(owner); | |
942 | err_lock: | |
943 | mutex_unlock(&acpi_debugger.lock); | |
944 | return ret; | |
945 | } | |
946 | ||
947 | int acpi_debugger_wait_command_ready(void) | |
948 | { | |
949 | int ret; | |
950 | int (*func)(bool, char *, size_t); | |
951 | struct module *owner; | |
952 | ||
953 | if (!acpi_debugger_initialized) | |
954 | return -ENODEV; | |
955 | mutex_lock(&acpi_debugger.lock); | |
956 | if (!acpi_debugger.ops) { | |
957 | ret = -ENODEV; | |
958 | goto err_lock; | |
959 | } | |
960 | if (!try_module_get(acpi_debugger.owner)) { | |
961 | ret = -ENODEV; | |
962 | goto err_lock; | |
963 | } | |
964 | func = acpi_debugger.ops->wait_command_ready; | |
965 | owner = acpi_debugger.owner; | |
966 | mutex_unlock(&acpi_debugger.lock); | |
967 | ||
968 | ret = func(acpi_gbl_method_executing, | |
969 | acpi_gbl_db_line_buf, ACPI_DB_LINE_BUFFER_SIZE); | |
970 | ||
971 | mutex_lock(&acpi_debugger.lock); | |
972 | module_put(owner); | |
973 | err_lock: | |
974 | mutex_unlock(&acpi_debugger.lock); | |
975 | return ret; | |
976 | } | |
977 | ||
978 | int acpi_debugger_notify_command_complete(void) | |
979 | { | |
980 | int ret; | |
981 | int (*func)(void); | |
982 | struct module *owner; | |
983 | ||
984 | if (!acpi_debugger_initialized) | |
985 | return -ENODEV; | |
986 | mutex_lock(&acpi_debugger.lock); | |
987 | if (!acpi_debugger.ops) { | |
988 | ret = -ENODEV; | |
989 | goto err_lock; | |
990 | } | |
991 | if (!try_module_get(acpi_debugger.owner)) { | |
992 | ret = -ENODEV; | |
993 | goto err_lock; | |
994 | } | |
995 | func = acpi_debugger.ops->notify_command_complete; | |
996 | owner = acpi_debugger.owner; | |
997 | mutex_unlock(&acpi_debugger.lock); | |
998 | ||
999 | ret = func(); | |
1000 | ||
1001 | mutex_lock(&acpi_debugger.lock); | |
1002 | module_put(owner); | |
1003 | err_lock: | |
1004 | mutex_unlock(&acpi_debugger.lock); | |
1005 | return ret; | |
1006 | } | |
1007 | ||
1008 | int __init acpi_debugger_init(void) | |
1009 | { | |
1010 | mutex_init(&acpi_debugger.lock); | |
1011 | acpi_debugger_initialized = true; | |
1012 | return 0; | |
1013 | } | |
1014 | #endif | |
1015 | ||
b8d35192 AS |
1016 | /******************************************************************************* |
1017 | * | |
1018 | * FUNCTION: acpi_os_execute | |
1019 | * | |
1020 | * PARAMETERS: Type - Type of the callback | |
1021 | * Function - Function to be executed | |
1022 | * Context - Function parameters | |
1023 | * | |
1024 | * RETURN: Status | |
1025 | * | |
1026 | * DESCRIPTION: Depending on type, either queues function for deferred execution or | |
1027 | * immediately executes function on a separate thread. | |
1028 | * | |
1029 | ******************************************************************************/ | |
1030 | ||
7b98118a RW |
1031 | acpi_status acpi_os_execute(acpi_execute_type type, |
1032 | acpi_osd_exec_callback function, void *context) | |
1da177e4 | 1033 | { |
4be44fcd LB |
1034 | acpi_status status = AE_OK; |
1035 | struct acpi_os_dpc *dpc; | |
17bc54ee | 1036 | struct workqueue_struct *queue; |
19cd847a | 1037 | int ret; |
72945b2b LB |
1038 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
1039 | "Scheduling function [%p(%p)] for deferred execution.\n", | |
1040 | function, context)); | |
1da177e4 | 1041 | |
8cfb0cdf | 1042 | if (type == OSL_DEBUGGER_MAIN_THREAD) { |
836d0830 | 1043 | ret = acpi_debugger_create_thread(function, context); |
8cfb0cdf LZ |
1044 | if (ret) { |
1045 | pr_err("Call to kthread_create() failed.\n"); | |
1046 | status = AE_ERROR; | |
1047 | } | |
1048 | goto out_thread; | |
1049 | } | |
1050 | ||
1da177e4 LT |
1051 | /* |
1052 | * Allocate/initialize DPC structure. Note that this memory will be | |
65f27f38 | 1053 | * freed by the callee. The kernel handles the work_struct list in a |
1da177e4 LT |
1054 | * way that allows us to also free its memory inside the callee. |
1055 | * Because we may want to schedule several tasks with different | |
1056 | * parameters we can't use the approach some kernel code uses of | |
65f27f38 | 1057 | * having a static work_struct. |
1da177e4 | 1058 | */ |
72945b2b | 1059 | |
3ae45a27 | 1060 | dpc = kzalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC); |
1da177e4 | 1061 | if (!dpc) |
889c78be | 1062 | return AE_NO_MEMORY; |
b976fe19 | 1063 | |
1da177e4 LT |
1064 | dpc->function = function; |
1065 | dpc->context = context; | |
b976fe19 | 1066 | |
c02256be | 1067 | /* |
3ae45a27 RW |
1068 | * To prevent lockdep from complaining unnecessarily, make sure that |
1069 | * there is a different static lockdep key for each workqueue by using | |
1070 | * INIT_WORK() for each of them separately. | |
c02256be | 1071 | */ |
7b98118a | 1072 | if (type == OSL_NOTIFY_HANDLER) { |
3ae45a27 | 1073 | queue = kacpi_notify_wq; |
bc73675b | 1074 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); |
8cfb0cdf | 1075 | } else if (type == OSL_GPE_HANDLER) { |
3ae45a27 | 1076 | queue = kacpid_wq; |
bc73675b | 1077 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); |
8cfb0cdf LZ |
1078 | } else { |
1079 | pr_err("Unsupported os_execute type %d.\n", type); | |
1080 | status = AE_ERROR; | |
3ae45a27 | 1081 | } |
bc73675b | 1082 | |
8cfb0cdf LZ |
1083 | if (ACPI_FAILURE(status)) |
1084 | goto err_workqueue; | |
1085 | ||
8fec62b2 TH |
1086 | /* |
1087 | * On some machines, a software-initiated SMI causes corruption unless | |
1088 | * the SMI runs on CPU 0. An SMI can be initiated by any AML, but | |
1089 | * typically it's done in GPE-related methods that are run via | |
1090 | * workqueues, so we can avoid the known corruption cases by always | |
1091 | * queueing on CPU 0. | |
1092 | */ | |
1093 | ret = queue_work_on(0, queue, &dpc->work); | |
19cd847a | 1094 | if (!ret) { |
55ac9a01 LM |
1095 | printk(KERN_ERR PREFIX |
1096 | "Call to queue_work() failed.\n"); | |
17bc54ee | 1097 | status = AE_ERROR; |
1da177e4 | 1098 | } |
8cfb0cdf LZ |
1099 | err_workqueue: |
1100 | if (ACPI_FAILURE(status)) | |
1101 | kfree(dpc); | |
1102 | out_thread: | |
889c78be | 1103 | return status; |
1da177e4 | 1104 | } |
7b98118a | 1105 | EXPORT_SYMBOL(acpi_os_execute); |
4be44fcd | 1106 | |
7b98118a | 1107 | void acpi_os_wait_events_complete(void) |
19cd847a | 1108 | { |
90253a79 LZ |
1109 | /* |
1110 | * Make sure the GPE handler or the fixed event handler is not used | |
1111 | * on another CPU after removal. | |
1112 | */ | |
efb1cf7d CY |
1113 | if (acpi_sci_irq_valid()) |
1114 | synchronize_hardirq(acpi_sci_irq); | |
7b98118a RW |
1115 | flush_workqueue(kacpid_wq); |
1116 | flush_workqueue(kacpi_notify_wq); | |
19cd847a | 1117 | } |
1da177e4 | 1118 | |
7b98118a RW |
1119 | struct acpi_hp_work { |
1120 | struct work_struct work; | |
1e3bcb59 | 1121 | struct acpi_device *adev; |
7b98118a RW |
1122 | u32 src; |
1123 | }; | |
1124 | ||
1125 | static void acpi_hotplug_work_fn(struct work_struct *work) | |
19cd847a | 1126 | { |
7b98118a RW |
1127 | struct acpi_hp_work *hpw = container_of(work, struct acpi_hp_work, work); |
1128 | ||
1129 | acpi_os_wait_events_complete(); | |
1e3bcb59 | 1130 | acpi_device_hotplug(hpw->adev, hpw->src); |
7b98118a | 1131 | kfree(hpw); |
19cd847a ZR |
1132 | } |
1133 | ||
1e3bcb59 | 1134 | acpi_status acpi_hotplug_schedule(struct acpi_device *adev, u32 src) |
1da177e4 | 1135 | { |
7b98118a RW |
1136 | struct acpi_hp_work *hpw; |
1137 | ||
1138 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, | |
1e3bcb59 RW |
1139 | "Scheduling hotplug event (%p, %u) for deferred execution.\n", |
1140 | adev, src)); | |
7b98118a RW |
1141 | |
1142 | hpw = kmalloc(sizeof(*hpw), GFP_KERNEL); | |
1143 | if (!hpw) | |
1144 | return AE_NO_MEMORY; | |
1145 | ||
1146 | INIT_WORK(&hpw->work, acpi_hotplug_work_fn); | |
1e3bcb59 | 1147 | hpw->adev = adev; |
7b98118a RW |
1148 | hpw->src = src; |
1149 | /* | |
1150 | * We can't run hotplug code in kacpid_wq/kacpid_notify_wq etc., because | |
1151 | * the hotplug code may call driver .remove() functions, which may | |
1152 | * invoke flush_scheduled_work()/acpi_os_wait_events_complete() to flush | |
1153 | * these workqueues. | |
1154 | */ | |
1155 | if (!queue_work(kacpi_hotplug_wq, &hpw->work)) { | |
1156 | kfree(hpw); | |
1157 | return AE_ERROR; | |
1158 | } | |
1159 | return AE_OK; | |
1da177e4 | 1160 | } |
4be44fcd | 1161 | |
d783156e RW |
1162 | bool acpi_queue_hotplug_work(struct work_struct *work) |
1163 | { | |
1164 | return queue_work(kacpi_hotplug_wq, work); | |
1165 | } | |
1da177e4 | 1166 | |
1da177e4 | 1167 | acpi_status |
4be44fcd | 1168 | acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle) |
1da177e4 | 1169 | { |
4be44fcd | 1170 | struct semaphore *sem = NULL; |
1da177e4 | 1171 | |
2d0acb4a | 1172 | sem = acpi_os_allocate_zeroed(sizeof(struct semaphore)); |
1da177e4 | 1173 | if (!sem) |
d550d98d | 1174 | return AE_NO_MEMORY; |
1da177e4 LT |
1175 | |
1176 | sema_init(sem, initial_units); | |
1177 | ||
4be44fcd | 1178 | *handle = (acpi_handle *) sem; |
1da177e4 | 1179 | |
4be44fcd LB |
1180 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n", |
1181 | *handle, initial_units)); | |
1da177e4 | 1182 | |
d550d98d | 1183 | return AE_OK; |
1da177e4 | 1184 | } |
1da177e4 | 1185 | |
1da177e4 LT |
1186 | /* |
1187 | * TODO: A better way to delete semaphores? Linux doesn't have a | |
1188 | * 'delete_semaphore()' function -- may result in an invalid | |
1189 | * pointer dereference for non-synchronized consumers. Should | |
1190 | * we at least check for blocked threads and signal/cancel them? | |
1191 | */ | |
1192 | ||
4be44fcd | 1193 | acpi_status acpi_os_delete_semaphore(acpi_handle handle) |
1da177e4 | 1194 | { |
4be44fcd | 1195 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 1196 | |
1da177e4 | 1197 | if (!sem) |
d550d98d | 1198 | return AE_BAD_PARAMETER; |
1da177e4 | 1199 | |
4be44fcd | 1200 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle)); |
1da177e4 | 1201 | |
f1241c87 | 1202 | BUG_ON(!list_empty(&sem->wait_list)); |
02438d87 | 1203 | kfree(sem); |
4be44fcd | 1204 | sem = NULL; |
1da177e4 | 1205 | |
d550d98d | 1206 | return AE_OK; |
1da177e4 | 1207 | } |
1da177e4 | 1208 | |
1da177e4 | 1209 | /* |
1da177e4 LT |
1210 | * TODO: Support for units > 1? |
1211 | */ | |
4be44fcd | 1212 | acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout) |
1da177e4 | 1213 | { |
4be44fcd LB |
1214 | acpi_status status = AE_OK; |
1215 | struct semaphore *sem = (struct semaphore *)handle; | |
f1241c87 | 1216 | long jiffies; |
4be44fcd | 1217 | int ret = 0; |
1da177e4 | 1218 | |
7901a052 LZ |
1219 | if (!acpi_os_initialized) |
1220 | return AE_OK; | |
1221 | ||
1da177e4 | 1222 | if (!sem || (units < 1)) |
d550d98d | 1223 | return AE_BAD_PARAMETER; |
1da177e4 LT |
1224 | |
1225 | if (units > 1) | |
d550d98d | 1226 | return AE_SUPPORT; |
1da177e4 | 1227 | |
4be44fcd LB |
1228 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n", |
1229 | handle, units, timeout)); | |
1da177e4 | 1230 | |
f1241c87 MW |
1231 | if (timeout == ACPI_WAIT_FOREVER) |
1232 | jiffies = MAX_SCHEDULE_TIMEOUT; | |
1233 | else | |
1234 | jiffies = msecs_to_jiffies(timeout); | |
cad1525a | 1235 | |
f1241c87 MW |
1236 | ret = down_timeout(sem, jiffies); |
1237 | if (ret) | |
1238 | status = AE_TIME; | |
1da177e4 LT |
1239 | |
1240 | if (ACPI_FAILURE(status)) { | |
9e7e2c04 | 1241 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, |
a6fc6720 | 1242 | "Failed to acquire semaphore[%p|%d|%d], %s", |
4be44fcd LB |
1243 | handle, units, timeout, |
1244 | acpi_format_exception(status))); | |
1245 | } else { | |
1246 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, | |
a6fc6720 | 1247 | "Acquired semaphore[%p|%d|%d]", handle, |
4be44fcd | 1248 | units, timeout)); |
1da177e4 LT |
1249 | } |
1250 | ||
d550d98d | 1251 | return status; |
1da177e4 | 1252 | } |
1da177e4 | 1253 | |
1da177e4 LT |
1254 | /* |
1255 | * TODO: Support for units > 1? | |
1256 | */ | |
4be44fcd | 1257 | acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units) |
1da177e4 | 1258 | { |
4be44fcd | 1259 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 1260 | |
7901a052 LZ |
1261 | if (!acpi_os_initialized) |
1262 | return AE_OK; | |
1263 | ||
1da177e4 | 1264 | if (!sem || (units < 1)) |
d550d98d | 1265 | return AE_BAD_PARAMETER; |
1da177e4 LT |
1266 | |
1267 | if (units > 1) | |
d550d98d | 1268 | return AE_SUPPORT; |
1da177e4 | 1269 | |
4be44fcd LB |
1270 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle, |
1271 | units)); | |
1da177e4 LT |
1272 | |
1273 | up(sem); | |
1274 | ||
d550d98d | 1275 | return AE_OK; |
1da177e4 | 1276 | } |
4be44fcd | 1277 | |
4d946f79 | 1278 | acpi_status acpi_os_get_line(char *buffer, u32 buffer_length, u32 *bytes_read) |
1da177e4 | 1279 | { |
1da177e4 LT |
1280 | #ifdef ENABLE_DEBUGGER |
1281 | if (acpi_in_debugger) { | |
1282 | u32 chars; | |
1283 | ||
4d946f79 | 1284 | kdb_read(buffer, buffer_length); |
1da177e4 LT |
1285 | |
1286 | /* remove the CR kdb includes */ | |
1287 | chars = strlen(buffer) - 1; | |
1288 | buffer[chars] = '\0'; | |
1289 | } | |
8cfb0cdf LZ |
1290 | #else |
1291 | int ret; | |
1292 | ||
836d0830 | 1293 | ret = acpi_debugger_read_cmd(buffer, buffer_length); |
8cfb0cdf LZ |
1294 | if (ret < 0) |
1295 | return AE_ERROR; | |
1296 | if (bytes_read) | |
1297 | *bytes_read = ret; | |
1da177e4 LT |
1298 | #endif |
1299 | ||
4d946f79 | 1300 | return AE_OK; |
1da177e4 | 1301 | } |
836d0830 | 1302 | EXPORT_SYMBOL(acpi_os_get_line); |
1da177e4 | 1303 | |
8cfb0cdf LZ |
1304 | acpi_status acpi_os_wait_command_ready(void) |
1305 | { | |
1306 | int ret; | |
1307 | ||
836d0830 | 1308 | ret = acpi_debugger_wait_command_ready(); |
8cfb0cdf LZ |
1309 | if (ret < 0) |
1310 | return AE_ERROR; | |
1311 | return AE_OK; | |
1312 | } | |
1313 | ||
1314 | acpi_status acpi_os_notify_command_complete(void) | |
1315 | { | |
1316 | int ret; | |
1317 | ||
836d0830 | 1318 | ret = acpi_debugger_notify_command_complete(); |
8cfb0cdf LZ |
1319 | if (ret < 0) |
1320 | return AE_ERROR; | |
1321 | return AE_OK; | |
1322 | } | |
1323 | ||
4be44fcd | 1324 | acpi_status acpi_os_signal(u32 function, void *info) |
1da177e4 | 1325 | { |
4be44fcd | 1326 | switch (function) { |
1da177e4 LT |
1327 | case ACPI_SIGNAL_FATAL: |
1328 | printk(KERN_ERR PREFIX "Fatal opcode executed\n"); | |
1329 | break; | |
1330 | case ACPI_SIGNAL_BREAKPOINT: | |
1331 | /* | |
1332 | * AML Breakpoint | |
1333 | * ACPI spec. says to treat it as a NOP unless | |
1334 | * you are debugging. So if/when we integrate | |
1335 | * AML debugger into the kernel debugger its | |
1336 | * hook will go here. But until then it is | |
1337 | * not useful to print anything on breakpoints. | |
1338 | */ | |
1339 | break; | |
1340 | default: | |
1341 | break; | |
1342 | } | |
1343 | ||
1344 | return AE_OK; | |
1345 | } | |
4be44fcd | 1346 | |
4be44fcd | 1347 | static int __init acpi_os_name_setup(char *str) |
1da177e4 LT |
1348 | { |
1349 | char *p = acpi_os_name; | |
4be44fcd | 1350 | int count = ACPI_MAX_OVERRIDE_LEN - 1; |
1da177e4 LT |
1351 | |
1352 | if (!str || !*str) | |
1353 | return 0; | |
1354 | ||
5e2be4e0 | 1355 | for (; count-- && *str; str++) { |
1da177e4 LT |
1356 | if (isalnum(*str) || *str == ' ' || *str == ':') |
1357 | *p++ = *str; | |
1358 | else if (*str == '\'' || *str == '"') | |
1359 | continue; | |
1360 | else | |
1361 | break; | |
1362 | } | |
1363 | *p = 0; | |
1364 | ||
1365 | return 1; | |
4be44fcd | 1366 | |
1da177e4 LT |
1367 | } |
1368 | ||
1369 | __setup("acpi_os_name=", acpi_os_name_setup); | |
1370 | ||
22b5afce | 1371 | /* |
08e1d7c0 | 1372 | * Disable the auto-serialization of named objects creation methods. |
22b5afce | 1373 | * |
08e1d7c0 | 1374 | * This feature is enabled by default. It marks the AML control methods |
22b5afce BM |
1375 | * that contain the opcodes to create named objects as "Serialized". |
1376 | */ | |
08e1d7c0 | 1377 | static int __init acpi_no_auto_serialize_setup(char *str) |
1da177e4 | 1378 | { |
08e1d7c0 LZ |
1379 | acpi_gbl_auto_serialize_methods = FALSE; |
1380 | pr_info("ACPI: auto-serialization disabled\n"); | |
1da177e4 LT |
1381 | |
1382 | return 1; | |
1383 | } | |
1384 | ||
08e1d7c0 | 1385 | __setup("acpi_no_auto_serialize", acpi_no_auto_serialize_setup); |
1da177e4 | 1386 | |
df92e695 TR |
1387 | /* Check of resource interference between native drivers and ACPI |
1388 | * OperationRegions (SystemIO and System Memory only). | |
1389 | * IO ports and memory declared in ACPI might be used by the ACPI subsystem | |
1390 | * in arbitrary AML code and can interfere with legacy drivers. | |
1391 | * acpi_enforce_resources= can be set to: | |
1392 | * | |
7e90560c | 1393 | * - strict (default) (2) |
df92e695 | 1394 | * -> further driver trying to access the resources will not load |
7e90560c | 1395 | * - lax (1) |
df92e695 TR |
1396 | * -> further driver trying to access the resources will load, but you |
1397 | * get a system message that something might go wrong... | |
1398 | * | |
1399 | * - no (0) | |
1400 | * -> ACPI Operation Region resources will not be registered | |
1401 | * | |
1402 | */ | |
1403 | #define ENFORCE_RESOURCES_STRICT 2 | |
1404 | #define ENFORCE_RESOURCES_LAX 1 | |
1405 | #define ENFORCE_RESOURCES_NO 0 | |
1406 | ||
7e90560c | 1407 | static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; |
df92e695 TR |
1408 | |
1409 | static int __init acpi_enforce_resources_setup(char *str) | |
1410 | { | |
1411 | if (str == NULL || *str == '\0') | |
1412 | return 0; | |
1413 | ||
1414 | if (!strcmp("strict", str)) | |
1415 | acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; | |
1416 | else if (!strcmp("lax", str)) | |
1417 | acpi_enforce_resources = ENFORCE_RESOURCES_LAX; | |
1418 | else if (!strcmp("no", str)) | |
1419 | acpi_enforce_resources = ENFORCE_RESOURCES_NO; | |
1420 | ||
1421 | return 1; | |
1422 | } | |
1423 | ||
1424 | __setup("acpi_enforce_resources=", acpi_enforce_resources_setup); | |
1425 | ||
1426 | /* Check for resource conflicts between ACPI OperationRegions and native | |
1427 | * drivers */ | |
876fba43 | 1428 | int acpi_check_resource_conflict(const struct resource *res) |
df92e695 | 1429 | { |
f654c0fe LM |
1430 | acpi_adr_space_type space_id; |
1431 | acpi_size length; | |
1432 | u8 warn = 0; | |
1433 | int clash = 0; | |
df92e695 TR |
1434 | |
1435 | if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) | |
1436 | return 0; | |
1437 | if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM)) | |
1438 | return 0; | |
1439 | ||
f654c0fe LM |
1440 | if (res->flags & IORESOURCE_IO) |
1441 | space_id = ACPI_ADR_SPACE_SYSTEM_IO; | |
1442 | else | |
1443 | space_id = ACPI_ADR_SPACE_SYSTEM_MEMORY; | |
df92e695 | 1444 | |
e4f52244 | 1445 | length = resource_size(res); |
f654c0fe LM |
1446 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) |
1447 | warn = 1; | |
1448 | clash = acpi_check_address_range(space_id, res->start, length, warn); | |
df92e695 TR |
1449 | |
1450 | if (clash) { | |
1451 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) { | |
14f03343 JD |
1452 | if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX) |
1453 | printk(KERN_NOTICE "ACPI: This conflict may" | |
1454 | " cause random problems and system" | |
1455 | " instability\n"); | |
1456 | printk(KERN_INFO "ACPI: If an ACPI driver is available" | |
1457 | " for this device, you should use it instead of" | |
1458 | " the native driver\n"); | |
df92e695 TR |
1459 | } |
1460 | if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT) | |
1461 | return -EBUSY; | |
1462 | } | |
1463 | return 0; | |
1464 | } | |
443dea72 | 1465 | EXPORT_SYMBOL(acpi_check_resource_conflict); |
df92e695 TR |
1466 | |
1467 | int acpi_check_region(resource_size_t start, resource_size_t n, | |
1468 | const char *name) | |
1469 | { | |
1470 | struct resource res = { | |
1471 | .start = start, | |
1472 | .end = start + n - 1, | |
1473 | .name = name, | |
1474 | .flags = IORESOURCE_IO, | |
1475 | }; | |
1476 | ||
1477 | return acpi_check_resource_conflict(&res); | |
1478 | } | |
1479 | EXPORT_SYMBOL(acpi_check_region); | |
1480 | ||
70dd6bea JD |
1481 | /* |
1482 | * Let drivers know whether the resource checks are effective | |
1483 | */ | |
1484 | int acpi_resources_are_enforced(void) | |
1485 | { | |
1486 | return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT; | |
1487 | } | |
1488 | EXPORT_SYMBOL(acpi_resources_are_enforced); | |
1489 | ||
9f63b88b LM |
1490 | /* |
1491 | * Deallocate the memory for a spinlock. | |
1492 | */ | |
1493 | void acpi_os_delete_lock(acpi_spinlock handle) | |
1494 | { | |
1495 | ACPI_FREE(handle); | |
1496 | } | |
1497 | ||
73459f73 RM |
1498 | /* |
1499 | * Acquire a spinlock. | |
1500 | * | |
1501 | * handle is a pointer to the spinlock_t. | |
73459f73 RM |
1502 | */ |
1503 | ||
967440e3 | 1504 | acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp) |
73459f73 | 1505 | { |
b8e4d893 | 1506 | acpi_cpu_flags flags; |
967440e3 | 1507 | spin_lock_irqsave(lockp, flags); |
73459f73 RM |
1508 | return flags; |
1509 | } | |
1510 | ||
1511 | /* | |
1512 | * Release a spinlock. See above. | |
1513 | */ | |
1514 | ||
967440e3 | 1515 | void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags) |
73459f73 | 1516 | { |
967440e3 | 1517 | spin_unlock_irqrestore(lockp, flags); |
73459f73 RM |
1518 | } |
1519 | ||
73459f73 RM |
1520 | #ifndef ACPI_USE_LOCAL_CACHE |
1521 | ||
1522 | /******************************************************************************* | |
1523 | * | |
1524 | * FUNCTION: acpi_os_create_cache | |
1525 | * | |
b229cf92 BM |
1526 | * PARAMETERS: name - Ascii name for the cache |
1527 | * size - Size of each cached object | |
1528 | * depth - Maximum depth of the cache (in objects) <ignored> | |
1529 | * cache - Where the new cache object is returned | |
73459f73 | 1530 | * |
b229cf92 | 1531 | * RETURN: status |
73459f73 RM |
1532 | * |
1533 | * DESCRIPTION: Create a cache object | |
1534 | * | |
1535 | ******************************************************************************/ | |
1536 | ||
1537 | acpi_status | |
4be44fcd | 1538 | acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache) |
73459f73 | 1539 | { |
20c2df83 | 1540 | *cache = kmem_cache_create(name, size, 0, 0, NULL); |
a6fdbf90 | 1541 | if (*cache == NULL) |
b229cf92 BM |
1542 | return AE_ERROR; |
1543 | else | |
1544 | return AE_OK; | |
73459f73 RM |
1545 | } |
1546 | ||
1547 | /******************************************************************************* | |
1548 | * | |
1549 | * FUNCTION: acpi_os_purge_cache | |
1550 | * | |
1551 | * PARAMETERS: Cache - Handle to cache object | |
1552 | * | |
1553 | * RETURN: Status | |
1554 | * | |
1555 | * DESCRIPTION: Free all objects within the requested cache. | |
1556 | * | |
1557 | ******************************************************************************/ | |
1558 | ||
4be44fcd | 1559 | acpi_status acpi_os_purge_cache(acpi_cache_t * cache) |
73459f73 | 1560 | { |
50dd0969 | 1561 | kmem_cache_shrink(cache); |
4be44fcd | 1562 | return (AE_OK); |
73459f73 RM |
1563 | } |
1564 | ||
1565 | /******************************************************************************* | |
1566 | * | |
1567 | * FUNCTION: acpi_os_delete_cache | |
1568 | * | |
1569 | * PARAMETERS: Cache - Handle to cache object | |
1570 | * | |
1571 | * RETURN: Status | |
1572 | * | |
1573 | * DESCRIPTION: Free all objects within the requested cache and delete the | |
1574 | * cache object. | |
1575 | * | |
1576 | ******************************************************************************/ | |
1577 | ||
4be44fcd | 1578 | acpi_status acpi_os_delete_cache(acpi_cache_t * cache) |
73459f73 | 1579 | { |
1a1d92c1 | 1580 | kmem_cache_destroy(cache); |
4be44fcd | 1581 | return (AE_OK); |
73459f73 RM |
1582 | } |
1583 | ||
1584 | /******************************************************************************* | |
1585 | * | |
1586 | * FUNCTION: acpi_os_release_object | |
1587 | * | |
1588 | * PARAMETERS: Cache - Handle to cache object | |
1589 | * Object - The object to be released | |
1590 | * | |
1591 | * RETURN: None | |
1592 | * | |
1593 | * DESCRIPTION: Release an object to the specified cache. If cache is full, | |
1594 | * the object is deleted. | |
1595 | * | |
1596 | ******************************************************************************/ | |
1597 | ||
4be44fcd | 1598 | acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object) |
73459f73 | 1599 | { |
4be44fcd LB |
1600 | kmem_cache_free(cache, object); |
1601 | return (AE_OK); | |
73459f73 | 1602 | } |
73459f73 | 1603 | #endif |
d362edaf | 1604 | |
a94e88cd | 1605 | static int __init acpi_no_static_ssdt_setup(char *s) |
b75dd297 | 1606 | { |
a94e88cd LZ |
1607 | acpi_gbl_disable_ssdt_table_install = TRUE; |
1608 | pr_info("ACPI: static SSDT installation disabled\n"); | |
b75dd297 | 1609 | |
a94e88cd | 1610 | return 0; |
b75dd297 LZ |
1611 | } |
1612 | ||
a94e88cd | 1613 | early_param("acpi_no_static_ssdt", acpi_no_static_ssdt_setup); |
b75dd297 | 1614 | |
4dde507f LZ |
1615 | static int __init acpi_disable_return_repair(char *s) |
1616 | { | |
1617 | printk(KERN_NOTICE PREFIX | |
1618 | "ACPI: Predefined validation mechanism disabled\n"); | |
1619 | acpi_gbl_disable_auto_repair = TRUE; | |
1620 | ||
1621 | return 1; | |
1622 | } | |
1623 | ||
1624 | __setup("acpica_no_return_repair", acpi_disable_return_repair); | |
1625 | ||
d362edaf MS |
1626 | acpi_status __init acpi_os_initialize(void) |
1627 | { | |
1628 | acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block); | |
1629 | acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block); | |
1630 | acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block); | |
1631 | acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block); | |
a4714a89 RW |
1632 | if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) { |
1633 | /* | |
1634 | * Use acpi_os_map_generic_address to pre-map the reset | |
1635 | * register if it's in system memory. | |
1636 | */ | |
1637 | int rv; | |
1638 | ||
1639 | rv = acpi_os_map_generic_address(&acpi_gbl_FADT.reset_register); | |
1640 | pr_debug(PREFIX "%s: map reset_reg status %d\n", __func__, rv); | |
1641 | } | |
7901a052 | 1642 | acpi_os_initialized = true; |
d362edaf MS |
1643 | |
1644 | return AE_OK; | |
1645 | } | |
1646 | ||
32d47eef | 1647 | acpi_status __init acpi_os_initialize1(void) |
d362edaf | 1648 | { |
44d2588e TH |
1649 | kacpid_wq = alloc_workqueue("kacpid", 0, 1); |
1650 | kacpi_notify_wq = alloc_workqueue("kacpi_notify", 0, 1); | |
d783156e | 1651 | kacpi_hotplug_wq = alloc_ordered_workqueue("kacpi_hotplug", 0); |
d362edaf MS |
1652 | BUG_ON(!kacpid_wq); |
1653 | BUG_ON(!kacpi_notify_wq); | |
1654 | BUG_ON(!kacpi_hotplug_wq); | |
e5f660eb | 1655 | acpi_osi_init(); |
d362edaf MS |
1656 | return AE_OK; |
1657 | } | |
1658 | ||
1659 | acpi_status acpi_os_terminate(void) | |
1660 | { | |
1661 | if (acpi_irq_handler) { | |
23fe3630 | 1662 | acpi_os_remove_interrupt_handler(acpi_gbl_FADT.sci_interrupt, |
d362edaf MS |
1663 | acpi_irq_handler); |
1664 | } | |
1665 | ||
1666 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe1_block); | |
1667 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block); | |
1668 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block); | |
1669 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block); | |
a4714a89 RW |
1670 | if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) |
1671 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.reset_register); | |
d362edaf MS |
1672 | |
1673 | destroy_workqueue(kacpid_wq); | |
1674 | destroy_workqueue(kacpi_notify_wq); | |
1675 | destroy_workqueue(kacpi_hotplug_wq); | |
1676 | ||
1677 | return AE_OK; | |
1678 | } | |
09f98a82 TL |
1679 | |
1680 | acpi_status acpi_os_prepare_sleep(u8 sleep_state, u32 pm1a_control, | |
1681 | u32 pm1b_control) | |
1682 | { | |
1683 | int rc = 0; | |
1684 | if (__acpi_os_prepare_sleep) | |
1685 | rc = __acpi_os_prepare_sleep(sleep_state, | |
1686 | pm1a_control, pm1b_control); | |
1687 | if (rc < 0) | |
1688 | return AE_ERROR; | |
1689 | else if (rc > 0) | |
1690 | return AE_CTRL_SKIP; | |
1691 | ||
1692 | return AE_OK; | |
1693 | } | |
1694 | ||
1695 | void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state, | |
1696 | u32 pm1a_ctrl, u32 pm1b_ctrl)) | |
1697 | { | |
1698 | __acpi_os_prepare_sleep = func; | |
1699 | } | |
92d8aff3 | 1700 | |
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) | |
1711 | return AE_CTRL_SKIP; | |
1712 | ||
1713 | return AE_OK; | |
1714 | } | |
1715 | ||
1716 | void acpi_os_set_prepare_extended_sleep(int (*func)(u8 sleep_state, | |
1717 | u32 val_a, u32 val_b)) | |
1718 | { | |
1719 | __acpi_os_prepare_extended_sleep = func; | |
1720 | } |