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1da177e4 LT |
1 | /* |
2 | * acpi_osl.c - OS-dependent functions ($Revision: 83 $) | |
3 | * | |
4 | * Copyright (C) 2000 Andrew Henroid | |
5 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> | |
6 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
f1241c87 MW |
7 | * Copyright (c) 2008 Intel Corporation |
8 | * Author: Matthew Wilcox <willy@linux.intel.com> | |
1da177e4 LT |
9 | * |
10 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2 of the License, or | |
15 | * (at your option) any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
1da177e4 LT |
22 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
23 | * | |
24 | */ | |
25 | ||
1da177e4 LT |
26 | #include <linux/module.h> |
27 | #include <linux/kernel.h> | |
28 | #include <linux/slab.h> | |
29 | #include <linux/mm.h> | |
ba242d5b | 30 | #include <linux/highmem.h> |
1da177e4 | 31 | #include <linux/pci.h> |
1da177e4 LT |
32 | #include <linux/interrupt.h> |
33 | #include <linux/kmod.h> | |
34 | #include <linux/delay.h> | |
35 | #include <linux/workqueue.h> | |
36 | #include <linux/nmi.h> | |
ad71860a | 37 | #include <linux/acpi.h> |
1da177e4 | 38 | #include <linux/efi.h> |
df92e695 TR |
39 | #include <linux/ioport.h> |
40 | #include <linux/list.h> | |
f1241c87 MW |
41 | #include <linux/jiffies.h> |
42 | #include <linux/semaphore.h> | |
43 | ||
44 | #include <asm/io.h> | |
7c0f6ba6 | 45 | #include <linux/uaccess.h> |
2f8e2c87 | 46 | #include <linux/io-64-nonatomic-lo-hi.h> |
f1241c87 | 47 | |
d2d2e3c4 HK |
48 | #include "acpica/accommon.h" |
49 | #include "acpica/acnamesp.h" | |
1129c92f | 50 | #include "internal.h" |
1da177e4 | 51 | |
1da177e4 | 52 | #define _COMPONENT ACPI_OS_SERVICES |
f52fd66d | 53 | ACPI_MODULE_NAME("osl"); |
07070e12 | 54 | |
4be44fcd LB |
55 | struct acpi_os_dpc { |
56 | acpi_osd_exec_callback function; | |
57 | void *context; | |
65f27f38 | 58 | struct work_struct work; |
1da177e4 LT |
59 | }; |
60 | ||
1da177e4 LT |
61 | #ifdef ENABLE_DEBUGGER |
62 | #include <linux/kdb.h> | |
63 | ||
64 | /* stuff for debugger support */ | |
65 | int acpi_in_debugger; | |
66 | EXPORT_SYMBOL(acpi_in_debugger); | |
4be44fcd | 67 | #endif /*ENABLE_DEBUGGER */ |
1da177e4 | 68 | |
09f98a82 TL |
69 | static int (*__acpi_os_prepare_sleep)(u8 sleep_state, u32 pm1a_ctrl, |
70 | u32 pm1b_ctrl); | |
d6b47b12 BG |
71 | static int (*__acpi_os_prepare_extended_sleep)(u8 sleep_state, u32 val_a, |
72 | u32 val_b); | |
09f98a82 | 73 | |
1da177e4 LT |
74 | static acpi_osd_handler acpi_irq_handler; |
75 | static void *acpi_irq_context; | |
76 | static struct workqueue_struct *kacpid_wq; | |
88db5e14 | 77 | static struct workqueue_struct *kacpi_notify_wq; |
92d8aff3 | 78 | static struct workqueue_struct *kacpi_hotplug_wq; |
7901a052 | 79 | static bool acpi_os_initialized; |
49e4b843 | 80 | unsigned int acpi_sci_irq = INVALID_ACPI_IRQ; |
8d3523fb | 81 | bool acpi_permanent_mmap = false; |
1da177e4 | 82 | |
620242ae MS |
83 | /* |
84 | * This list of permanent mappings is for memory that may be accessed from | |
85 | * interrupt context, where we can't do the ioremap(). | |
86 | */ | |
87 | struct acpi_ioremap { | |
88 | struct list_head list; | |
89 | void __iomem *virt; | |
90 | acpi_physical_address phys; | |
91 | acpi_size size; | |
b7c1fadd | 92 | unsigned long refcount; |
620242ae MS |
93 | }; |
94 | ||
95 | static LIST_HEAD(acpi_ioremaps); | |
7bbb8903 | 96 | static DEFINE_MUTEX(acpi_ioremap_lock); |
620242ae | 97 | |
bc9ffce2 | 98 | static void __init acpi_request_region (struct acpi_generic_address *gas, |
9a47cdb1 BH |
99 | unsigned int length, char *desc) |
100 | { | |
bc9ffce2 MS |
101 | u64 addr; |
102 | ||
103 | /* Handle possible alignment issues */ | |
104 | memcpy(&addr, &gas->address, sizeof(addr)); | |
105 | if (!addr || !length) | |
9a47cdb1 BH |
106 | return; |
107 | ||
0294112e RW |
108 | /* Resources are never freed */ |
109 | if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_IO) | |
110 | request_region(addr, length, desc); | |
111 | else if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) | |
112 | request_mem_region(addr, length, desc); | |
9a47cdb1 BH |
113 | } |
114 | ||
0294112e | 115 | static int __init acpi_reserve_resources(void) |
9a47cdb1 | 116 | { |
eee3c859 | 117 | acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
118 | "ACPI PM1a_EVT_BLK"); |
119 | ||
eee3c859 | 120 | acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
121 | "ACPI PM1b_EVT_BLK"); |
122 | ||
eee3c859 | 123 | acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
124 | "ACPI PM1a_CNT_BLK"); |
125 | ||
eee3c859 | 126 | acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
127 | "ACPI PM1b_CNT_BLK"); |
128 | ||
eee3c859 LB |
129 | if (acpi_gbl_FADT.pm_timer_length == 4) |
130 | acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR"); | |
9a47cdb1 | 131 | |
eee3c859 | 132 | acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length, |
9a47cdb1 BH |
133 | "ACPI PM2_CNT_BLK"); |
134 | ||
135 | /* Length of GPE blocks must be a non-negative multiple of 2 */ | |
136 | ||
eee3c859 LB |
137 | if (!(acpi_gbl_FADT.gpe0_block_length & 0x1)) |
138 | acpi_request_region(&acpi_gbl_FADT.xgpe0_block, | |
139 | acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK"); | |
9a47cdb1 | 140 | |
eee3c859 LB |
141 | if (!(acpi_gbl_FADT.gpe1_block_length & 0x1)) |
142 | acpi_request_region(&acpi_gbl_FADT.xgpe1_block, | |
143 | acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK"); | |
0294112e RW |
144 | |
145 | return 0; | |
9a47cdb1 | 146 | } |
0294112e | 147 | fs_initcall_sync(acpi_reserve_resources); |
9a47cdb1 | 148 | |
4be44fcd | 149 | void acpi_os_printf(const char *fmt, ...) |
1da177e4 LT |
150 | { |
151 | va_list args; | |
152 | va_start(args, fmt); | |
153 | acpi_os_vprintf(fmt, args); | |
154 | va_end(args); | |
155 | } | |
836d0830 | 156 | EXPORT_SYMBOL(acpi_os_printf); |
4be44fcd | 157 | |
4be44fcd | 158 | void acpi_os_vprintf(const char *fmt, va_list args) |
1da177e4 LT |
159 | { |
160 | static char buffer[512]; | |
4be44fcd | 161 | |
1da177e4 LT |
162 | vsprintf(buffer, fmt, args); |
163 | ||
164 | #ifdef ENABLE_DEBUGGER | |
165 | if (acpi_in_debugger) { | |
166 | kdb_printf("%s", buffer); | |
167 | } else { | |
abc4b9a5 JP |
168 | if (printk_get_level(buffer)) |
169 | printk("%s", buffer); | |
170 | else | |
171 | printk(KERN_CONT "%s", buffer); | |
1da177e4 LT |
172 | } |
173 | #else | |
abc4b9a5 JP |
174 | if (acpi_debugger_write_log(buffer) < 0) { |
175 | if (printk_get_level(buffer)) | |
176 | printk("%s", buffer); | |
177 | else | |
178 | printk(KERN_CONT "%s", buffer); | |
179 | } | |
1da177e4 LT |
180 | #endif |
181 | } | |
182 | ||
4996c023 TI |
183 | #ifdef CONFIG_KEXEC |
184 | static unsigned long acpi_rsdp; | |
185 | static int __init setup_acpi_rsdp(char *arg) | |
186 | { | |
5dcb9ca8 | 187 | return kstrtoul(arg, 16, &acpi_rsdp); |
4996c023 TI |
188 | } |
189 | early_param("acpi_rsdp", setup_acpi_rsdp); | |
190 | #endif | |
191 | ||
ad71860a | 192 | acpi_physical_address __init acpi_os_get_root_pointer(void) |
1da177e4 | 193 | { |
dfc9327a | 194 | acpi_physical_address pa; |
2fb65f09 | 195 | |
4996c023 TI |
196 | #ifdef CONFIG_KEXEC |
197 | if (acpi_rsdp) | |
198 | return acpi_rsdp; | |
199 | #endif | |
dfc9327a JG |
200 | pa = acpi_arch_get_root_pointer(); |
201 | if (pa) | |
202 | return pa; | |
4996c023 | 203 | |
83e68189 | 204 | if (efi_enabled(EFI_CONFIG_TABLES)) { |
b2c99e3c | 205 | if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) |
ad71860a | 206 | return efi.acpi20; |
2fb65f09 | 207 | if (efi.acpi != EFI_INVALID_TABLE_ADDR) |
ad71860a | 208 | return efi.acpi; |
2fb65f09 | 209 | pr_err(PREFIX "System description tables not found\n"); |
8a1664be | 210 | } else if (IS_ENABLED(CONFIG_ACPI_LEGACY_TABLES_LOOKUP)) { |
239665a3 | 211 | acpi_find_root_pointer(&pa); |
239665a3 | 212 | } |
8a1664be | 213 | |
2fb65f09 | 214 | return pa; |
1da177e4 LT |
215 | } |
216 | ||
78cdb3ed | 217 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ |
4a3cba5e MS |
218 | static struct acpi_ioremap * |
219 | acpi_map_lookup(acpi_physical_address phys, acpi_size size) | |
620242ae MS |
220 | { |
221 | struct acpi_ioremap *map; | |
222 | ||
78cdb3ed | 223 | list_for_each_entry_rcu(map, &acpi_ioremaps, list) |
620242ae MS |
224 | if (map->phys <= phys && |
225 | phys + size <= map->phys + map->size) | |
4a3cba5e MS |
226 | return map; |
227 | ||
228 | return NULL; | |
229 | } | |
230 | ||
231 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ | |
232 | static void __iomem * | |
233 | acpi_map_vaddr_lookup(acpi_physical_address phys, unsigned int size) | |
234 | { | |
235 | struct acpi_ioremap *map; | |
236 | ||
237 | map = acpi_map_lookup(phys, size); | |
238 | if (map) | |
239 | return map->virt + (phys - map->phys); | |
620242ae MS |
240 | |
241 | return NULL; | |
242 | } | |
243 | ||
13606a2d RW |
244 | void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size) |
245 | { | |
246 | struct acpi_ioremap *map; | |
247 | void __iomem *virt = NULL; | |
248 | ||
249 | mutex_lock(&acpi_ioremap_lock); | |
250 | map = acpi_map_lookup(phys, size); | |
251 | if (map) { | |
252 | virt = map->virt + (phys - map->phys); | |
253 | map->refcount++; | |
254 | } | |
255 | mutex_unlock(&acpi_ioremap_lock); | |
256 | return virt; | |
257 | } | |
258 | EXPORT_SYMBOL_GPL(acpi_os_get_iomem); | |
259 | ||
78cdb3ed | 260 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ |
620242ae MS |
261 | static struct acpi_ioremap * |
262 | acpi_map_lookup_virt(void __iomem *virt, acpi_size size) | |
263 | { | |
264 | struct acpi_ioremap *map; | |
265 | ||
78cdb3ed | 266 | list_for_each_entry_rcu(map, &acpi_ioremaps, list) |
4a3cba5e MS |
267 | if (map->virt <= virt && |
268 | virt + size <= map->virt + map->size) | |
620242ae MS |
269 | return map; |
270 | ||
271 | return NULL; | |
272 | } | |
273 | ||
aafc65c7 | 274 | #if defined(CONFIG_IA64) || defined(CONFIG_ARM64) |
ba242d5b MS |
275 | /* ioremap will take care of cache attributes */ |
276 | #define should_use_kmap(pfn) 0 | |
aafc65c7 GG |
277 | #else |
278 | #define should_use_kmap(pfn) page_is_ram(pfn) | |
ba242d5b MS |
279 | #endif |
280 | ||
281 | static void __iomem *acpi_map(acpi_physical_address pg_off, unsigned long pg_sz) | |
282 | { | |
283 | unsigned long pfn; | |
284 | ||
285 | pfn = pg_off >> PAGE_SHIFT; | |
286 | if (should_use_kmap(pfn)) { | |
287 | if (pg_sz > PAGE_SIZE) | |
288 | return NULL; | |
289 | return (void __iomem __force *)kmap(pfn_to_page(pfn)); | |
290 | } else | |
291 | return acpi_os_ioremap(pg_off, pg_sz); | |
292 | } | |
293 | ||
294 | static void acpi_unmap(acpi_physical_address pg_off, void __iomem *vaddr) | |
295 | { | |
296 | unsigned long pfn; | |
297 | ||
298 | pfn = pg_off >> PAGE_SHIFT; | |
e252675f | 299 | if (should_use_kmap(pfn)) |
ba242d5b MS |
300 | kunmap(pfn_to_page(pfn)); |
301 | else | |
302 | iounmap(vaddr); | |
303 | } | |
304 | ||
9d128ed1 RW |
305 | /** |
306 | * acpi_os_map_iomem - Get a virtual address for a given physical address range. | |
307 | * @phys: Start of the physical address range to map. | |
308 | * @size: Size of the physical address range to map. | |
309 | * | |
310 | * Look up the given physical address range in the list of existing ACPI memory | |
311 | * mappings. If found, get a reference to it and return a pointer to it (its | |
312 | * virtual address). If not found, map it, add it to that list and return a | |
313 | * pointer to it. | |
314 | * | |
8d3523fb | 315 | * During early init (when acpi_permanent_mmap has not been set yet) this |
9d128ed1 RW |
316 | * routine simply calls __acpi_map_table() to get the job done. |
317 | */ | |
bd721ea7 | 318 | void __iomem *__ref |
a238317c | 319 | acpi_os_map_iomem(acpi_physical_address phys, acpi_size size) |
1da177e4 | 320 | { |
7ffd0443 | 321 | struct acpi_ioremap *map; |
620242ae | 322 | void __iomem *virt; |
2d6d9fd3 RW |
323 | acpi_physical_address pg_off; |
324 | acpi_size pg_sz; | |
620242ae | 325 | |
9f4fd61f BH |
326 | if (phys > ULONG_MAX) { |
327 | printk(KERN_ERR PREFIX "Cannot map memory that high\n"); | |
70c0846e | 328 | return NULL; |
1da177e4 | 329 | } |
620242ae | 330 | |
8d3523fb | 331 | if (!acpi_permanent_mmap) |
ad71860a | 332 | return __acpi_map_table((unsigned long)phys, size); |
620242ae | 333 | |
7ffd0443 RW |
334 | mutex_lock(&acpi_ioremap_lock); |
335 | /* Check if there's a suitable mapping already. */ | |
336 | map = acpi_map_lookup(phys, size); | |
337 | if (map) { | |
b7c1fadd | 338 | map->refcount++; |
7ffd0443 RW |
339 | goto out; |
340 | } | |
341 | ||
620242ae | 342 | map = kzalloc(sizeof(*map), GFP_KERNEL); |
7ffd0443 RW |
343 | if (!map) { |
344 | mutex_unlock(&acpi_ioremap_lock); | |
620242ae | 345 | return NULL; |
7ffd0443 | 346 | } |
620242ae | 347 | |
4a3cba5e MS |
348 | pg_off = round_down(phys, PAGE_SIZE); |
349 | pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off; | |
ba242d5b | 350 | virt = acpi_map(pg_off, pg_sz); |
620242ae | 351 | if (!virt) { |
7ffd0443 | 352 | mutex_unlock(&acpi_ioremap_lock); |
620242ae MS |
353 | kfree(map); |
354 | return NULL; | |
355 | } | |
356 | ||
357 | INIT_LIST_HEAD(&map->list); | |
358 | map->virt = virt; | |
4a3cba5e MS |
359 | map->phys = pg_off; |
360 | map->size = pg_sz; | |
b7c1fadd | 361 | map->refcount = 1; |
620242ae | 362 | |
78cdb3ed | 363 | list_add_tail_rcu(&map->list, &acpi_ioremaps); |
620242ae | 364 | |
a238317c | 365 | out: |
7ffd0443 | 366 | mutex_unlock(&acpi_ioremap_lock); |
4a3cba5e | 367 | return map->virt + (phys - map->phys); |
1da177e4 | 368 | } |
a238317c LZ |
369 | EXPORT_SYMBOL_GPL(acpi_os_map_iomem); |
370 | ||
bd721ea7 | 371 | void *__ref acpi_os_map_memory(acpi_physical_address phys, acpi_size size) |
a238317c LZ |
372 | { |
373 | return (void *)acpi_os_map_iomem(phys, size); | |
374 | } | |
55a82ab3 | 375 | EXPORT_SYMBOL_GPL(acpi_os_map_memory); |
1da177e4 | 376 | |
b7c1fadd | 377 | static void acpi_os_drop_map_ref(struct acpi_ioremap *map) |
4a3cba5e | 378 | { |
b7c1fadd RW |
379 | if (!--map->refcount) |
380 | list_del_rcu(&map->list); | |
4a3cba5e | 381 | } |
4a3cba5e | 382 | |
b7c1fadd | 383 | static void acpi_os_map_cleanup(struct acpi_ioremap *map) |
7fe135dc | 384 | { |
b7c1fadd | 385 | if (!map->refcount) { |
74b51ee1 | 386 | synchronize_rcu_expedited(); |
ba242d5b | 387 | acpi_unmap(map->phys, map->virt); |
b7c1fadd RW |
388 | kfree(map); |
389 | } | |
4a3cba5e MS |
390 | } |
391 | ||
9d128ed1 RW |
392 | /** |
393 | * acpi_os_unmap_iomem - Drop a memory mapping reference. | |
394 | * @virt: Start of the address range to drop a reference to. | |
395 | * @size: Size of the address range to drop a reference to. | |
396 | * | |
397 | * Look up the given virtual address range in the list of existing ACPI memory | |
398 | * mappings, drop a reference to it and unmap it if there are no more active | |
399 | * references to it. | |
400 | * | |
8d3523fb | 401 | * During early init (when acpi_permanent_mmap has not been set yet) this |
9d128ed1 RW |
402 | * routine simply calls __acpi_unmap_table() to get the job done. Since |
403 | * __acpi_unmap_table() is an __init function, the __ref annotation is needed | |
404 | * here. | |
405 | */ | |
a238317c | 406 | void __ref acpi_os_unmap_iomem(void __iomem *virt, acpi_size size) |
1da177e4 | 407 | { |
620242ae | 408 | struct acpi_ioremap *map; |
620242ae | 409 | |
8d3523fb | 410 | if (!acpi_permanent_mmap) { |
7d97277b | 411 | __acpi_unmap_table(virt, size); |
620242ae MS |
412 | return; |
413 | } | |
414 | ||
7bbb8903 | 415 | mutex_lock(&acpi_ioremap_lock); |
620242ae MS |
416 | map = acpi_map_lookup_virt(virt, size); |
417 | if (!map) { | |
7bbb8903 | 418 | mutex_unlock(&acpi_ioremap_lock); |
7fe135dc | 419 | WARN(true, PREFIX "%s: bad address %p\n", __func__, virt); |
620242ae MS |
420 | return; |
421 | } | |
b7c1fadd | 422 | acpi_os_drop_map_ref(map); |
7bbb8903 | 423 | mutex_unlock(&acpi_ioremap_lock); |
620242ae | 424 | |
b7c1fadd | 425 | acpi_os_map_cleanup(map); |
1da177e4 | 426 | } |
a238317c LZ |
427 | EXPORT_SYMBOL_GPL(acpi_os_unmap_iomem); |
428 | ||
429 | void __ref acpi_os_unmap_memory(void *virt, acpi_size size) | |
430 | { | |
431 | return acpi_os_unmap_iomem((void __iomem *)virt, size); | |
432 | } | |
55a82ab3 | 433 | EXPORT_SYMBOL_GPL(acpi_os_unmap_memory); |
1da177e4 | 434 | |
6f68c91c | 435 | int acpi_os_map_generic_address(struct acpi_generic_address *gas) |
29718521 | 436 | { |
bc9ffce2 | 437 | u64 addr; |
29718521 MS |
438 | void __iomem *virt; |
439 | ||
bc9ffce2 | 440 | if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) |
29718521 MS |
441 | return 0; |
442 | ||
bc9ffce2 MS |
443 | /* Handle possible alignment issues */ |
444 | memcpy(&addr, &gas->address, sizeof(addr)); | |
445 | if (!addr || !gas->bit_width) | |
29718521 MS |
446 | return -EINVAL; |
447 | ||
a238317c | 448 | virt = acpi_os_map_iomem(addr, gas->bit_width / 8); |
29718521 MS |
449 | if (!virt) |
450 | return -EIO; | |
451 | ||
452 | return 0; | |
453 | } | |
6f68c91c | 454 | EXPORT_SYMBOL(acpi_os_map_generic_address); |
29718521 | 455 | |
6f68c91c | 456 | void acpi_os_unmap_generic_address(struct acpi_generic_address *gas) |
29718521 | 457 | { |
bc9ffce2 | 458 | u64 addr; |
7fe135dc | 459 | struct acpi_ioremap *map; |
29718521 | 460 | |
bc9ffce2 | 461 | if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) |
29718521 MS |
462 | return; |
463 | ||
bc9ffce2 MS |
464 | /* Handle possible alignment issues */ |
465 | memcpy(&addr, &gas->address, sizeof(addr)); | |
466 | if (!addr || !gas->bit_width) | |
29718521 MS |
467 | return; |
468 | ||
7bbb8903 | 469 | mutex_lock(&acpi_ioremap_lock); |
bc9ffce2 | 470 | map = acpi_map_lookup(addr, gas->bit_width / 8); |
7fe135dc RW |
471 | if (!map) { |
472 | mutex_unlock(&acpi_ioremap_lock); | |
473 | return; | |
474 | } | |
b7c1fadd | 475 | acpi_os_drop_map_ref(map); |
7bbb8903 | 476 | mutex_unlock(&acpi_ioremap_lock); |
29718521 | 477 | |
b7c1fadd | 478 | acpi_os_map_cleanup(map); |
29718521 | 479 | } |
6f68c91c | 480 | EXPORT_SYMBOL(acpi_os_unmap_generic_address); |
29718521 | 481 | |
1da177e4 LT |
482 | #ifdef ACPI_FUTURE_USAGE |
483 | acpi_status | |
4be44fcd | 484 | acpi_os_get_physical_address(void *virt, acpi_physical_address * phys) |
1da177e4 | 485 | { |
4be44fcd | 486 | if (!phys || !virt) |
1da177e4 LT |
487 | return AE_BAD_PARAMETER; |
488 | ||
489 | *phys = virt_to_phys(virt); | |
490 | ||
491 | return AE_OK; | |
492 | } | |
493 | #endif | |
494 | ||
18d78b64 RW |
495 | #ifdef CONFIG_ACPI_REV_OVERRIDE_POSSIBLE |
496 | static bool acpi_rev_override; | |
497 | ||
498 | int __init acpi_rev_override_setup(char *str) | |
499 | { | |
500 | acpi_rev_override = true; | |
501 | return 1; | |
502 | } | |
503 | __setup("acpi_rev_override", acpi_rev_override_setup); | |
504 | #else | |
505 | #define acpi_rev_override false | |
506 | #endif | |
507 | ||
1da177e4 LT |
508 | #define ACPI_MAX_OVERRIDE_LEN 100 |
509 | ||
510 | static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN]; | |
511 | ||
512 | acpi_status | |
4be44fcd | 513 | acpi_os_predefined_override(const struct acpi_predefined_names *init_val, |
80b28810 | 514 | acpi_string *new_val) |
1da177e4 LT |
515 | { |
516 | if (!init_val || !new_val) | |
517 | return AE_BAD_PARAMETER; | |
518 | ||
519 | *new_val = NULL; | |
4be44fcd | 520 | if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) { |
1da177e4 | 521 | printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n", |
4be44fcd | 522 | acpi_os_name); |
1da177e4 LT |
523 | *new_val = acpi_os_name; |
524 | } | |
525 | ||
18d78b64 RW |
526 | if (!memcmp(init_val->name, "_REV", 4) && acpi_rev_override) { |
527 | printk(KERN_INFO PREFIX "Overriding _REV return value to 5\n"); | |
528 | *new_val = (char *)5; | |
529 | } | |
530 | ||
1da177e4 LT |
531 | return AE_OK; |
532 | } | |
533 | ||
7d12e780 | 534 | static irqreturn_t acpi_irq(int irq, void *dev_id) |
1da177e4 | 535 | { |
5229e87d LB |
536 | u32 handled; |
537 | ||
538 | handled = (*acpi_irq_handler) (acpi_irq_context); | |
539 | ||
540 | if (handled) { | |
541 | acpi_irq_handled++; | |
542 | return IRQ_HANDLED; | |
88bea188 LB |
543 | } else { |
544 | acpi_irq_not_handled++; | |
5229e87d | 545 | return IRQ_NONE; |
88bea188 | 546 | } |
1da177e4 LT |
547 | } |
548 | ||
549 | acpi_status | |
4be44fcd LB |
550 | acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler, |
551 | void *context) | |
1da177e4 LT |
552 | { |
553 | unsigned int irq; | |
554 | ||
5229e87d LB |
555 | acpi_irq_stats_init(); |
556 | ||
1da177e4 | 557 | /* |
23fe3630 RW |
558 | * ACPI interrupts different from the SCI in our copy of the FADT are |
559 | * not supported. | |
1da177e4 | 560 | */ |
23fe3630 RW |
561 | if (gsi != acpi_gbl_FADT.sci_interrupt) |
562 | return AE_BAD_PARAMETER; | |
563 | ||
564 | if (acpi_irq_handler) | |
565 | return AE_ALREADY_ACQUIRED; | |
566 | ||
1da177e4 LT |
567 | if (acpi_gsi_to_irq(gsi, &irq) < 0) { |
568 | printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n", | |
569 | gsi); | |
570 | return AE_OK; | |
571 | } | |
572 | ||
573 | acpi_irq_handler = handler; | |
574 | acpi_irq_context = context; | |
a8d46b9e | 575 | if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) { |
1da177e4 | 576 | printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq); |
23fe3630 | 577 | acpi_irq_handler = NULL; |
1da177e4 LT |
578 | return AE_NOT_ACQUIRED; |
579 | } | |
49e4b843 | 580 | acpi_sci_irq = irq; |
1da177e4 LT |
581 | |
582 | return AE_OK; | |
583 | } | |
584 | ||
49e4b843 | 585 | acpi_status acpi_os_remove_interrupt_handler(u32 gsi, acpi_osd_handler handler) |
1da177e4 | 586 | { |
49e4b843 | 587 | if (gsi != acpi_gbl_FADT.sci_interrupt || !acpi_sci_irq_valid()) |
23fe3630 RW |
588 | return AE_BAD_PARAMETER; |
589 | ||
49e4b843 | 590 | free_irq(acpi_sci_irq, acpi_irq); |
23fe3630 | 591 | acpi_irq_handler = NULL; |
49e4b843 | 592 | acpi_sci_irq = INVALID_ACPI_IRQ; |
1da177e4 LT |
593 | |
594 | return AE_OK; | |
595 | } | |
596 | ||
597 | /* | |
598 | * Running in interpreter thread context, safe to sleep | |
599 | */ | |
600 | ||
439913ff | 601 | void acpi_os_sleep(u64 ms) |
1da177e4 | 602 | { |
30282299 | 603 | msleep(ms); |
1da177e4 | 604 | } |
4be44fcd | 605 | |
4be44fcd | 606 | void acpi_os_stall(u32 us) |
1da177e4 LT |
607 | { |
608 | while (us) { | |
609 | u32 delay = 1000; | |
610 | ||
611 | if (delay > us) | |
612 | delay = us; | |
613 | udelay(delay); | |
614 | touch_nmi_watchdog(); | |
615 | us -= delay; | |
616 | } | |
617 | } | |
4be44fcd | 618 | |
1da177e4 | 619 | /* |
83b2348e BVA |
620 | * Support ACPI 3.0 AML Timer operand. Returns a 64-bit free-running, |
621 | * monotonically increasing timer with 100ns granularity. Do not use | |
622 | * ktime_get() to implement this function because this function may get | |
623 | * called after timekeeping has been suspended. Note: calling this function | |
624 | * after timekeeping has been suspended may lead to unexpected results | |
625 | * because when timekeeping is suspended the jiffies counter is not | |
626 | * incremented. See also timekeeping_suspend(). | |
1da177e4 | 627 | */ |
4be44fcd | 628 | u64 acpi_os_get_timer(void) |
1da177e4 | 629 | { |
83b2348e BVA |
630 | return (get_jiffies_64() - INITIAL_JIFFIES) * |
631 | (ACPI_100NSEC_PER_SEC / HZ); | |
1da177e4 LT |
632 | } |
633 | ||
4be44fcd | 634 | acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width) |
1da177e4 LT |
635 | { |
636 | u32 dummy; | |
637 | ||
638 | if (!value) | |
639 | value = &dummy; | |
640 | ||
49fbabf5 ZY |
641 | *value = 0; |
642 | if (width <= 8) { | |
4be44fcd | 643 | *(u8 *) value = inb(port); |
49fbabf5 | 644 | } else if (width <= 16) { |
4be44fcd | 645 | *(u16 *) value = inw(port); |
49fbabf5 | 646 | } else if (width <= 32) { |
4be44fcd | 647 | *(u32 *) value = inl(port); |
49fbabf5 | 648 | } else { |
1da177e4 LT |
649 | BUG(); |
650 | } | |
651 | ||
652 | return AE_OK; | |
653 | } | |
4be44fcd | 654 | |
1da177e4 LT |
655 | EXPORT_SYMBOL(acpi_os_read_port); |
656 | ||
4be44fcd | 657 | acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width) |
1da177e4 | 658 | { |
49fbabf5 | 659 | if (width <= 8) { |
1da177e4 | 660 | outb(value, port); |
49fbabf5 | 661 | } else if (width <= 16) { |
1da177e4 | 662 | outw(value, port); |
49fbabf5 | 663 | } else if (width <= 32) { |
1da177e4 | 664 | outl(value, port); |
49fbabf5 | 665 | } else { |
1da177e4 LT |
666 | BUG(); |
667 | } | |
668 | ||
669 | return AE_OK; | |
670 | } | |
4be44fcd | 671 | |
1da177e4 LT |
672 | EXPORT_SYMBOL(acpi_os_write_port); |
673 | ||
eeb2d80d SP |
674 | int acpi_os_read_iomem(void __iomem *virt_addr, u64 *value, u32 width) |
675 | { | |
676 | ||
677 | switch (width) { | |
678 | case 8: | |
679 | *(u8 *) value = readb(virt_addr); | |
680 | break; | |
681 | case 16: | |
682 | *(u16 *) value = readw(virt_addr); | |
683 | break; | |
684 | case 32: | |
685 | *(u32 *) value = readl(virt_addr); | |
686 | break; | |
687 | case 64: | |
688 | *(u64 *) value = readq(virt_addr); | |
689 | break; | |
690 | default: | |
691 | return -EINVAL; | |
692 | } | |
693 | ||
694 | return 0; | |
695 | } | |
696 | ||
e615bf5b | 697 | acpi_status |
653f4b53 | 698 | acpi_os_read_memory(acpi_physical_address phys_addr, u64 *value, u32 width) |
e615bf5b MS |
699 | { |
700 | void __iomem *virt_addr; | |
701 | unsigned int size = width / 8; | |
702 | bool unmap = false; | |
703 | u64 dummy; | |
eeb2d80d | 704 | int error; |
e615bf5b MS |
705 | |
706 | rcu_read_lock(); | |
707 | virt_addr = acpi_map_vaddr_lookup(phys_addr, size); | |
708 | if (!virt_addr) { | |
709 | rcu_read_unlock(); | |
710 | virt_addr = acpi_os_ioremap(phys_addr, size); | |
711 | if (!virt_addr) | |
712 | return AE_BAD_ADDRESS; | |
713 | unmap = true; | |
714 | } | |
715 | ||
716 | if (!value) | |
717 | value = &dummy; | |
718 | ||
eeb2d80d SP |
719 | error = acpi_os_read_iomem(virt_addr, value, width); |
720 | BUG_ON(error); | |
e615bf5b MS |
721 | |
722 | if (unmap) | |
723 | iounmap(virt_addr); | |
724 | else | |
725 | rcu_read_unlock(); | |
726 | ||
727 | return AE_OK; | |
728 | } | |
729 | ||
e615bf5b | 730 | acpi_status |
653f4b53 | 731 | acpi_os_write_memory(acpi_physical_address phys_addr, u64 value, u32 width) |
e615bf5b MS |
732 | { |
733 | void __iomem *virt_addr; | |
734 | unsigned int size = width / 8; | |
735 | bool unmap = false; | |
736 | ||
737 | rcu_read_lock(); | |
738 | virt_addr = acpi_map_vaddr_lookup(phys_addr, size); | |
739 | if (!virt_addr) { | |
740 | rcu_read_unlock(); | |
741 | virt_addr = acpi_os_ioremap(phys_addr, size); | |
742 | if (!virt_addr) | |
743 | return AE_BAD_ADDRESS; | |
744 | unmap = true; | |
745 | } | |
746 | ||
747 | switch (width) { | |
748 | case 8: | |
749 | writeb(value, virt_addr); | |
750 | break; | |
751 | case 16: | |
752 | writew(value, virt_addr); | |
753 | break; | |
754 | case 32: | |
755 | writel(value, virt_addr); | |
756 | break; | |
757 | case 64: | |
3277b4ea | 758 | writeq(value, virt_addr); |
e615bf5b MS |
759 | break; |
760 | default: | |
761 | BUG(); | |
762 | } | |
763 | ||
764 | if (unmap) | |
765 | iounmap(virt_addr); | |
766 | else | |
767 | rcu_read_unlock(); | |
768 | ||
769 | return AE_OK; | |
770 | } | |
771 | ||
bd23fac3 | 772 | #ifdef CONFIG_PCI |
1da177e4 | 773 | acpi_status |
4be44fcd | 774 | acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
c5f0231e | 775 | u64 *value, u32 width) |
1da177e4 LT |
776 | { |
777 | int result, size; | |
c5f0231e | 778 | u32 value32; |
1da177e4 LT |
779 | |
780 | if (!value) | |
781 | return AE_BAD_PARAMETER; | |
782 | ||
783 | switch (width) { | |
784 | case 8: | |
785 | size = 1; | |
786 | break; | |
787 | case 16: | |
788 | size = 2; | |
789 | break; | |
790 | case 32: | |
791 | size = 4; | |
792 | break; | |
793 | default: | |
794 | return AE_ERROR; | |
795 | } | |
796 | ||
b6ce068a MW |
797 | result = raw_pci_read(pci_id->segment, pci_id->bus, |
798 | PCI_DEVFN(pci_id->device, pci_id->function), | |
c5f0231e BM |
799 | reg, size, &value32); |
800 | *value = value32; | |
1da177e4 LT |
801 | |
802 | return (result ? AE_ERROR : AE_OK); | |
803 | } | |
4be44fcd | 804 | |
1da177e4 | 805 | acpi_status |
4be44fcd | 806 | acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
439913ff | 807 | u64 value, u32 width) |
1da177e4 LT |
808 | { |
809 | int result, size; | |
810 | ||
811 | switch (width) { | |
812 | case 8: | |
813 | size = 1; | |
814 | break; | |
815 | case 16: | |
816 | size = 2; | |
817 | break; | |
818 | case 32: | |
819 | size = 4; | |
820 | break; | |
821 | default: | |
822 | return AE_ERROR; | |
823 | } | |
824 | ||
b6ce068a MW |
825 | result = raw_pci_write(pci_id->segment, pci_id->bus, |
826 | PCI_DEVFN(pci_id->device, pci_id->function), | |
827 | reg, size, value); | |
1da177e4 LT |
828 | |
829 | return (result ? AE_ERROR : AE_OK); | |
830 | } | |
bd23fac3 | 831 | #endif |
1da177e4 | 832 | |
65f27f38 | 833 | static void acpi_os_execute_deferred(struct work_struct *work) |
88db5e14 AS |
834 | { |
835 | struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work); | |
88db5e14 | 836 | |
19cd847a ZR |
837 | dpc->function(dpc->context); |
838 | kfree(dpc); | |
19cd847a ZR |
839 | } |
840 | ||
836d0830 LZ |
841 | #ifdef CONFIG_ACPI_DEBUGGER |
842 | static struct acpi_debugger acpi_debugger; | |
843 | static bool acpi_debugger_initialized; | |
844 | ||
845 | int acpi_register_debugger(struct module *owner, | |
846 | const struct acpi_debugger_ops *ops) | |
847 | { | |
848 | int ret = 0; | |
849 | ||
850 | mutex_lock(&acpi_debugger.lock); | |
851 | if (acpi_debugger.ops) { | |
852 | ret = -EBUSY; | |
853 | goto err_lock; | |
854 | } | |
855 | ||
856 | acpi_debugger.owner = owner; | |
857 | acpi_debugger.ops = ops; | |
858 | ||
859 | err_lock: | |
860 | mutex_unlock(&acpi_debugger.lock); | |
861 | return ret; | |
862 | } | |
863 | EXPORT_SYMBOL(acpi_register_debugger); | |
864 | ||
865 | void acpi_unregister_debugger(const struct acpi_debugger_ops *ops) | |
866 | { | |
867 | mutex_lock(&acpi_debugger.lock); | |
868 | if (ops == acpi_debugger.ops) { | |
869 | acpi_debugger.ops = NULL; | |
870 | acpi_debugger.owner = NULL; | |
871 | } | |
872 | mutex_unlock(&acpi_debugger.lock); | |
873 | } | |
874 | EXPORT_SYMBOL(acpi_unregister_debugger); | |
875 | ||
876 | int acpi_debugger_create_thread(acpi_osd_exec_callback function, void *context) | |
877 | { | |
878 | int ret; | |
879 | int (*func)(acpi_osd_exec_callback, void *); | |
880 | struct module *owner; | |
881 | ||
882 | if (!acpi_debugger_initialized) | |
883 | return -ENODEV; | |
884 | mutex_lock(&acpi_debugger.lock); | |
885 | if (!acpi_debugger.ops) { | |
886 | ret = -ENODEV; | |
887 | goto err_lock; | |
888 | } | |
889 | if (!try_module_get(acpi_debugger.owner)) { | |
890 | ret = -ENODEV; | |
891 | goto err_lock; | |
892 | } | |
893 | func = acpi_debugger.ops->create_thread; | |
894 | owner = acpi_debugger.owner; | |
895 | mutex_unlock(&acpi_debugger.lock); | |
896 | ||
897 | ret = func(function, context); | |
898 | ||
899 | mutex_lock(&acpi_debugger.lock); | |
900 | module_put(owner); | |
901 | err_lock: | |
902 | mutex_unlock(&acpi_debugger.lock); | |
903 | return ret; | |
904 | } | |
905 | ||
906 | ssize_t acpi_debugger_write_log(const char *msg) | |
907 | { | |
908 | ssize_t ret; | |
909 | ssize_t (*func)(const char *); | |
910 | struct module *owner; | |
911 | ||
912 | if (!acpi_debugger_initialized) | |
913 | return -ENODEV; | |
914 | mutex_lock(&acpi_debugger.lock); | |
915 | if (!acpi_debugger.ops) { | |
916 | ret = -ENODEV; | |
917 | goto err_lock; | |
918 | } | |
919 | if (!try_module_get(acpi_debugger.owner)) { | |
920 | ret = -ENODEV; | |
921 | goto err_lock; | |
922 | } | |
923 | func = acpi_debugger.ops->write_log; | |
924 | owner = acpi_debugger.owner; | |
925 | mutex_unlock(&acpi_debugger.lock); | |
926 | ||
927 | ret = func(msg); | |
928 | ||
929 | mutex_lock(&acpi_debugger.lock); | |
930 | module_put(owner); | |
931 | err_lock: | |
932 | mutex_unlock(&acpi_debugger.lock); | |
933 | return ret; | |
934 | } | |
935 | ||
936 | ssize_t acpi_debugger_read_cmd(char *buffer, size_t buffer_length) | |
937 | { | |
938 | ssize_t ret; | |
939 | ssize_t (*func)(char *, size_t); | |
940 | struct module *owner; | |
941 | ||
942 | if (!acpi_debugger_initialized) | |
943 | return -ENODEV; | |
944 | mutex_lock(&acpi_debugger.lock); | |
945 | if (!acpi_debugger.ops) { | |
946 | ret = -ENODEV; | |
947 | goto err_lock; | |
948 | } | |
949 | if (!try_module_get(acpi_debugger.owner)) { | |
950 | ret = -ENODEV; | |
951 | goto err_lock; | |
952 | } | |
953 | func = acpi_debugger.ops->read_cmd; | |
954 | owner = acpi_debugger.owner; | |
955 | mutex_unlock(&acpi_debugger.lock); | |
956 | ||
957 | ret = func(buffer, buffer_length); | |
958 | ||
959 | mutex_lock(&acpi_debugger.lock); | |
960 | module_put(owner); | |
961 | err_lock: | |
962 | mutex_unlock(&acpi_debugger.lock); | |
963 | return ret; | |
964 | } | |
965 | ||
966 | int acpi_debugger_wait_command_ready(void) | |
967 | { | |
968 | int ret; | |
969 | int (*func)(bool, char *, size_t); | |
970 | struct module *owner; | |
971 | ||
972 | if (!acpi_debugger_initialized) | |
973 | return -ENODEV; | |
974 | mutex_lock(&acpi_debugger.lock); | |
975 | if (!acpi_debugger.ops) { | |
976 | ret = -ENODEV; | |
977 | goto err_lock; | |
978 | } | |
979 | if (!try_module_get(acpi_debugger.owner)) { | |
980 | ret = -ENODEV; | |
981 | goto err_lock; | |
982 | } | |
983 | func = acpi_debugger.ops->wait_command_ready; | |
984 | owner = acpi_debugger.owner; | |
985 | mutex_unlock(&acpi_debugger.lock); | |
986 | ||
987 | ret = func(acpi_gbl_method_executing, | |
988 | acpi_gbl_db_line_buf, ACPI_DB_LINE_BUFFER_SIZE); | |
989 | ||
990 | mutex_lock(&acpi_debugger.lock); | |
991 | module_put(owner); | |
992 | err_lock: | |
993 | mutex_unlock(&acpi_debugger.lock); | |
994 | return ret; | |
995 | } | |
996 | ||
997 | int acpi_debugger_notify_command_complete(void) | |
998 | { | |
999 | int ret; | |
1000 | int (*func)(void); | |
1001 | struct module *owner; | |
1002 | ||
1003 | if (!acpi_debugger_initialized) | |
1004 | return -ENODEV; | |
1005 | mutex_lock(&acpi_debugger.lock); | |
1006 | if (!acpi_debugger.ops) { | |
1007 | ret = -ENODEV; | |
1008 | goto err_lock; | |
1009 | } | |
1010 | if (!try_module_get(acpi_debugger.owner)) { | |
1011 | ret = -ENODEV; | |
1012 | goto err_lock; | |
1013 | } | |
1014 | func = acpi_debugger.ops->notify_command_complete; | |
1015 | owner = acpi_debugger.owner; | |
1016 | mutex_unlock(&acpi_debugger.lock); | |
1017 | ||
1018 | ret = func(); | |
1019 | ||
1020 | mutex_lock(&acpi_debugger.lock); | |
1021 | module_put(owner); | |
1022 | err_lock: | |
1023 | mutex_unlock(&acpi_debugger.lock); | |
1024 | return ret; | |
1025 | } | |
1026 | ||
1027 | int __init acpi_debugger_init(void) | |
1028 | { | |
1029 | mutex_init(&acpi_debugger.lock); | |
1030 | acpi_debugger_initialized = true; | |
1031 | return 0; | |
1032 | } | |
1033 | #endif | |
1034 | ||
b8d35192 AS |
1035 | /******************************************************************************* |
1036 | * | |
1037 | * FUNCTION: acpi_os_execute | |
1038 | * | |
1039 | * PARAMETERS: Type - Type of the callback | |
1040 | * Function - Function to be executed | |
1041 | * Context - Function parameters | |
1042 | * | |
1043 | * RETURN: Status | |
1044 | * | |
1045 | * DESCRIPTION: Depending on type, either queues function for deferred execution or | |
1046 | * immediately executes function on a separate thread. | |
1047 | * | |
1048 | ******************************************************************************/ | |
1049 | ||
7b98118a RW |
1050 | acpi_status acpi_os_execute(acpi_execute_type type, |
1051 | acpi_osd_exec_callback function, void *context) | |
1da177e4 | 1052 | { |
4be44fcd LB |
1053 | acpi_status status = AE_OK; |
1054 | struct acpi_os_dpc *dpc; | |
17bc54ee | 1055 | struct workqueue_struct *queue; |
19cd847a | 1056 | int ret; |
72945b2b LB |
1057 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
1058 | "Scheduling function [%p(%p)] for deferred execution.\n", | |
1059 | function, context)); | |
1da177e4 | 1060 | |
8cfb0cdf | 1061 | if (type == OSL_DEBUGGER_MAIN_THREAD) { |
836d0830 | 1062 | ret = acpi_debugger_create_thread(function, context); |
8cfb0cdf LZ |
1063 | if (ret) { |
1064 | pr_err("Call to kthread_create() failed.\n"); | |
1065 | status = AE_ERROR; | |
1066 | } | |
1067 | goto out_thread; | |
1068 | } | |
1069 | ||
1da177e4 LT |
1070 | /* |
1071 | * Allocate/initialize DPC structure. Note that this memory will be | |
65f27f38 | 1072 | * freed by the callee. The kernel handles the work_struct list in a |
1da177e4 LT |
1073 | * way that allows us to also free its memory inside the callee. |
1074 | * Because we may want to schedule several tasks with different | |
1075 | * parameters we can't use the approach some kernel code uses of | |
65f27f38 | 1076 | * having a static work_struct. |
1da177e4 | 1077 | */ |
72945b2b | 1078 | |
3ae45a27 | 1079 | dpc = kzalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC); |
1da177e4 | 1080 | if (!dpc) |
889c78be | 1081 | return AE_NO_MEMORY; |
b976fe19 | 1082 | |
1da177e4 LT |
1083 | dpc->function = function; |
1084 | dpc->context = context; | |
b976fe19 | 1085 | |
c02256be | 1086 | /* |
3ae45a27 RW |
1087 | * To prevent lockdep from complaining unnecessarily, make sure that |
1088 | * there is a different static lockdep key for each workqueue by using | |
1089 | * INIT_WORK() for each of them separately. | |
c02256be | 1090 | */ |
7b98118a | 1091 | if (type == OSL_NOTIFY_HANDLER) { |
3ae45a27 | 1092 | queue = kacpi_notify_wq; |
bc73675b | 1093 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); |
8cfb0cdf | 1094 | } else if (type == OSL_GPE_HANDLER) { |
3ae45a27 | 1095 | queue = kacpid_wq; |
bc73675b | 1096 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); |
8cfb0cdf LZ |
1097 | } else { |
1098 | pr_err("Unsupported os_execute type %d.\n", type); | |
1099 | status = AE_ERROR; | |
3ae45a27 | 1100 | } |
bc73675b | 1101 | |
8cfb0cdf LZ |
1102 | if (ACPI_FAILURE(status)) |
1103 | goto err_workqueue; | |
1104 | ||
8fec62b2 TH |
1105 | /* |
1106 | * On some machines, a software-initiated SMI causes corruption unless | |
1107 | * the SMI runs on CPU 0. An SMI can be initiated by any AML, but | |
1108 | * typically it's done in GPE-related methods that are run via | |
1109 | * workqueues, so we can avoid the known corruption cases by always | |
1110 | * queueing on CPU 0. | |
1111 | */ | |
1112 | ret = queue_work_on(0, queue, &dpc->work); | |
19cd847a | 1113 | if (!ret) { |
55ac9a01 LM |
1114 | printk(KERN_ERR PREFIX |
1115 | "Call to queue_work() failed.\n"); | |
17bc54ee | 1116 | status = AE_ERROR; |
1da177e4 | 1117 | } |
8cfb0cdf LZ |
1118 | err_workqueue: |
1119 | if (ACPI_FAILURE(status)) | |
1120 | kfree(dpc); | |
1121 | out_thread: | |
889c78be | 1122 | return status; |
1da177e4 | 1123 | } |
7b98118a | 1124 | EXPORT_SYMBOL(acpi_os_execute); |
4be44fcd | 1125 | |
7b98118a | 1126 | void acpi_os_wait_events_complete(void) |
19cd847a | 1127 | { |
90253a79 LZ |
1128 | /* |
1129 | * Make sure the GPE handler or the fixed event handler is not used | |
1130 | * on another CPU after removal. | |
1131 | */ | |
efb1cf7d CY |
1132 | if (acpi_sci_irq_valid()) |
1133 | synchronize_hardirq(acpi_sci_irq); | |
7b98118a RW |
1134 | flush_workqueue(kacpid_wq); |
1135 | flush_workqueue(kacpi_notify_wq); | |
19cd847a | 1136 | } |
757c968c | 1137 | EXPORT_SYMBOL(acpi_os_wait_events_complete); |
1da177e4 | 1138 | |
7b98118a RW |
1139 | struct acpi_hp_work { |
1140 | struct work_struct work; | |
1e3bcb59 | 1141 | struct acpi_device *adev; |
7b98118a RW |
1142 | u32 src; |
1143 | }; | |
1144 | ||
1145 | static void acpi_hotplug_work_fn(struct work_struct *work) | |
19cd847a | 1146 | { |
7b98118a RW |
1147 | struct acpi_hp_work *hpw = container_of(work, struct acpi_hp_work, work); |
1148 | ||
1149 | acpi_os_wait_events_complete(); | |
1e3bcb59 | 1150 | acpi_device_hotplug(hpw->adev, hpw->src); |
7b98118a | 1151 | kfree(hpw); |
19cd847a ZR |
1152 | } |
1153 | ||
1e3bcb59 | 1154 | acpi_status acpi_hotplug_schedule(struct acpi_device *adev, u32 src) |
1da177e4 | 1155 | { |
7b98118a RW |
1156 | struct acpi_hp_work *hpw; |
1157 | ||
1158 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, | |
1e3bcb59 RW |
1159 | "Scheduling hotplug event (%p, %u) for deferred execution.\n", |
1160 | adev, src)); | |
7b98118a RW |
1161 | |
1162 | hpw = kmalloc(sizeof(*hpw), GFP_KERNEL); | |
1163 | if (!hpw) | |
1164 | return AE_NO_MEMORY; | |
1165 | ||
1166 | INIT_WORK(&hpw->work, acpi_hotplug_work_fn); | |
1e3bcb59 | 1167 | hpw->adev = adev; |
7b98118a RW |
1168 | hpw->src = src; |
1169 | /* | |
1170 | * We can't run hotplug code in kacpid_wq/kacpid_notify_wq etc., because | |
1171 | * the hotplug code may call driver .remove() functions, which may | |
1172 | * invoke flush_scheduled_work()/acpi_os_wait_events_complete() to flush | |
1173 | * these workqueues. | |
1174 | */ | |
1175 | if (!queue_work(kacpi_hotplug_wq, &hpw->work)) { | |
1176 | kfree(hpw); | |
1177 | return AE_ERROR; | |
1178 | } | |
1179 | return AE_OK; | |
1da177e4 | 1180 | } |
4be44fcd | 1181 | |
d783156e RW |
1182 | bool acpi_queue_hotplug_work(struct work_struct *work) |
1183 | { | |
1184 | return queue_work(kacpi_hotplug_wq, work); | |
1185 | } | |
1da177e4 | 1186 | |
1da177e4 | 1187 | acpi_status |
4be44fcd | 1188 | acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle) |
1da177e4 | 1189 | { |
4be44fcd | 1190 | struct semaphore *sem = NULL; |
1da177e4 | 1191 | |
2d0acb4a | 1192 | sem = acpi_os_allocate_zeroed(sizeof(struct semaphore)); |
1da177e4 | 1193 | if (!sem) |
d550d98d | 1194 | return AE_NO_MEMORY; |
1da177e4 LT |
1195 | |
1196 | sema_init(sem, initial_units); | |
1197 | ||
4be44fcd | 1198 | *handle = (acpi_handle *) sem; |
1da177e4 | 1199 | |
4be44fcd LB |
1200 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n", |
1201 | *handle, initial_units)); | |
1da177e4 | 1202 | |
d550d98d | 1203 | return AE_OK; |
1da177e4 | 1204 | } |
1da177e4 | 1205 | |
1da177e4 LT |
1206 | /* |
1207 | * TODO: A better way to delete semaphores? Linux doesn't have a | |
1208 | * 'delete_semaphore()' function -- may result in an invalid | |
1209 | * pointer dereference for non-synchronized consumers. Should | |
1210 | * we at least check for blocked threads and signal/cancel them? | |
1211 | */ | |
1212 | ||
4be44fcd | 1213 | acpi_status acpi_os_delete_semaphore(acpi_handle handle) |
1da177e4 | 1214 | { |
4be44fcd | 1215 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 1216 | |
1da177e4 | 1217 | if (!sem) |
d550d98d | 1218 | return AE_BAD_PARAMETER; |
1da177e4 | 1219 | |
4be44fcd | 1220 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle)); |
1da177e4 | 1221 | |
f1241c87 | 1222 | BUG_ON(!list_empty(&sem->wait_list)); |
02438d87 | 1223 | kfree(sem); |
4be44fcd | 1224 | sem = NULL; |
1da177e4 | 1225 | |
d550d98d | 1226 | return AE_OK; |
1da177e4 | 1227 | } |
1da177e4 | 1228 | |
1da177e4 | 1229 | /* |
1da177e4 LT |
1230 | * TODO: Support for units > 1? |
1231 | */ | |
4be44fcd | 1232 | acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout) |
1da177e4 | 1233 | { |
4be44fcd LB |
1234 | acpi_status status = AE_OK; |
1235 | struct semaphore *sem = (struct semaphore *)handle; | |
f1241c87 | 1236 | long jiffies; |
4be44fcd | 1237 | int ret = 0; |
1da177e4 | 1238 | |
7901a052 LZ |
1239 | if (!acpi_os_initialized) |
1240 | return AE_OK; | |
1241 | ||
1da177e4 | 1242 | if (!sem || (units < 1)) |
d550d98d | 1243 | return AE_BAD_PARAMETER; |
1da177e4 LT |
1244 | |
1245 | if (units > 1) | |
d550d98d | 1246 | return AE_SUPPORT; |
1da177e4 | 1247 | |
4be44fcd LB |
1248 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n", |
1249 | handle, units, timeout)); | |
1da177e4 | 1250 | |
f1241c87 MW |
1251 | if (timeout == ACPI_WAIT_FOREVER) |
1252 | jiffies = MAX_SCHEDULE_TIMEOUT; | |
1253 | else | |
1254 | jiffies = msecs_to_jiffies(timeout); | |
cad1525a | 1255 | |
f1241c87 MW |
1256 | ret = down_timeout(sem, jiffies); |
1257 | if (ret) | |
1258 | status = AE_TIME; | |
1da177e4 LT |
1259 | |
1260 | if (ACPI_FAILURE(status)) { | |
9e7e2c04 | 1261 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, |
a6fc6720 | 1262 | "Failed to acquire semaphore[%p|%d|%d], %s", |
4be44fcd LB |
1263 | handle, units, timeout, |
1264 | acpi_format_exception(status))); | |
1265 | } else { | |
1266 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, | |
a6fc6720 | 1267 | "Acquired semaphore[%p|%d|%d]", handle, |
4be44fcd | 1268 | units, timeout)); |
1da177e4 LT |
1269 | } |
1270 | ||
d550d98d | 1271 | return status; |
1da177e4 | 1272 | } |
1da177e4 | 1273 | |
1da177e4 LT |
1274 | /* |
1275 | * TODO: Support for units > 1? | |
1276 | */ | |
4be44fcd | 1277 | acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units) |
1da177e4 | 1278 | { |
4be44fcd | 1279 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 1280 | |
7901a052 LZ |
1281 | if (!acpi_os_initialized) |
1282 | return AE_OK; | |
1283 | ||
1da177e4 | 1284 | if (!sem || (units < 1)) |
d550d98d | 1285 | return AE_BAD_PARAMETER; |
1da177e4 LT |
1286 | |
1287 | if (units > 1) | |
d550d98d | 1288 | return AE_SUPPORT; |
1da177e4 | 1289 | |
4be44fcd LB |
1290 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle, |
1291 | units)); | |
1da177e4 LT |
1292 | |
1293 | up(sem); | |
1294 | ||
d550d98d | 1295 | return AE_OK; |
1da177e4 | 1296 | } |
4be44fcd | 1297 | |
4d946f79 | 1298 | acpi_status acpi_os_get_line(char *buffer, u32 buffer_length, u32 *bytes_read) |
1da177e4 | 1299 | { |
1da177e4 LT |
1300 | #ifdef ENABLE_DEBUGGER |
1301 | if (acpi_in_debugger) { | |
1302 | u32 chars; | |
1303 | ||
4d946f79 | 1304 | kdb_read(buffer, buffer_length); |
1da177e4 LT |
1305 | |
1306 | /* remove the CR kdb includes */ | |
1307 | chars = strlen(buffer) - 1; | |
1308 | buffer[chars] = '\0'; | |
1309 | } | |
8cfb0cdf LZ |
1310 | #else |
1311 | int ret; | |
1312 | ||
836d0830 | 1313 | ret = acpi_debugger_read_cmd(buffer, buffer_length); |
8cfb0cdf LZ |
1314 | if (ret < 0) |
1315 | return AE_ERROR; | |
1316 | if (bytes_read) | |
1317 | *bytes_read = ret; | |
1da177e4 LT |
1318 | #endif |
1319 | ||
4d946f79 | 1320 | return AE_OK; |
1da177e4 | 1321 | } |
836d0830 | 1322 | EXPORT_SYMBOL(acpi_os_get_line); |
1da177e4 | 1323 | |
8cfb0cdf LZ |
1324 | acpi_status acpi_os_wait_command_ready(void) |
1325 | { | |
1326 | int ret; | |
1327 | ||
836d0830 | 1328 | ret = acpi_debugger_wait_command_ready(); |
8cfb0cdf LZ |
1329 | if (ret < 0) |
1330 | return AE_ERROR; | |
1331 | return AE_OK; | |
1332 | } | |
1333 | ||
1334 | acpi_status acpi_os_notify_command_complete(void) | |
1335 | { | |
1336 | int ret; | |
1337 | ||
836d0830 | 1338 | ret = acpi_debugger_notify_command_complete(); |
8cfb0cdf LZ |
1339 | if (ret < 0) |
1340 | return AE_ERROR; | |
1341 | return AE_OK; | |
1342 | } | |
1343 | ||
4be44fcd | 1344 | acpi_status acpi_os_signal(u32 function, void *info) |
1da177e4 | 1345 | { |
4be44fcd | 1346 | switch (function) { |
1da177e4 LT |
1347 | case ACPI_SIGNAL_FATAL: |
1348 | printk(KERN_ERR PREFIX "Fatal opcode executed\n"); | |
1349 | break; | |
1350 | case ACPI_SIGNAL_BREAKPOINT: | |
1351 | /* | |
1352 | * AML Breakpoint | |
1353 | * ACPI spec. says to treat it as a NOP unless | |
1354 | * you are debugging. So if/when we integrate | |
1355 | * AML debugger into the kernel debugger its | |
1356 | * hook will go here. But until then it is | |
1357 | * not useful to print anything on breakpoints. | |
1358 | */ | |
1359 | break; | |
1360 | default: | |
1361 | break; | |
1362 | } | |
1363 | ||
1364 | return AE_OK; | |
1365 | } | |
4be44fcd | 1366 | |
4be44fcd | 1367 | static int __init acpi_os_name_setup(char *str) |
1da177e4 LT |
1368 | { |
1369 | char *p = acpi_os_name; | |
4be44fcd | 1370 | int count = ACPI_MAX_OVERRIDE_LEN - 1; |
1da177e4 LT |
1371 | |
1372 | if (!str || !*str) | |
1373 | return 0; | |
1374 | ||
5e2be4e0 | 1375 | for (; count-- && *str; str++) { |
1da177e4 LT |
1376 | if (isalnum(*str) || *str == ' ' || *str == ':') |
1377 | *p++ = *str; | |
1378 | else if (*str == '\'' || *str == '"') | |
1379 | continue; | |
1380 | else | |
1381 | break; | |
1382 | } | |
1383 | *p = 0; | |
1384 | ||
1385 | return 1; | |
4be44fcd | 1386 | |
1da177e4 LT |
1387 | } |
1388 | ||
1389 | __setup("acpi_os_name=", acpi_os_name_setup); | |
1390 | ||
22b5afce | 1391 | /* |
08e1d7c0 | 1392 | * Disable the auto-serialization of named objects creation methods. |
22b5afce | 1393 | * |
08e1d7c0 | 1394 | * This feature is enabled by default. It marks the AML control methods |
22b5afce BM |
1395 | * that contain the opcodes to create named objects as "Serialized". |
1396 | */ | |
08e1d7c0 | 1397 | static int __init acpi_no_auto_serialize_setup(char *str) |
1da177e4 | 1398 | { |
08e1d7c0 LZ |
1399 | acpi_gbl_auto_serialize_methods = FALSE; |
1400 | pr_info("ACPI: auto-serialization disabled\n"); | |
1da177e4 LT |
1401 | |
1402 | return 1; | |
1403 | } | |
1404 | ||
08e1d7c0 | 1405 | __setup("acpi_no_auto_serialize", acpi_no_auto_serialize_setup); |
1da177e4 | 1406 | |
df92e695 TR |
1407 | /* Check of resource interference between native drivers and ACPI |
1408 | * OperationRegions (SystemIO and System Memory only). | |
1409 | * IO ports and memory declared in ACPI might be used by the ACPI subsystem | |
1410 | * in arbitrary AML code and can interfere with legacy drivers. | |
1411 | * acpi_enforce_resources= can be set to: | |
1412 | * | |
7e90560c | 1413 | * - strict (default) (2) |
df92e695 | 1414 | * -> further driver trying to access the resources will not load |
7e90560c | 1415 | * - lax (1) |
df92e695 TR |
1416 | * -> further driver trying to access the resources will load, but you |
1417 | * get a system message that something might go wrong... | |
1418 | * | |
1419 | * - no (0) | |
1420 | * -> ACPI Operation Region resources will not be registered | |
1421 | * | |
1422 | */ | |
1423 | #define ENFORCE_RESOURCES_STRICT 2 | |
1424 | #define ENFORCE_RESOURCES_LAX 1 | |
1425 | #define ENFORCE_RESOURCES_NO 0 | |
1426 | ||
7e90560c | 1427 | static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; |
df92e695 TR |
1428 | |
1429 | static int __init acpi_enforce_resources_setup(char *str) | |
1430 | { | |
1431 | if (str == NULL || *str == '\0') | |
1432 | return 0; | |
1433 | ||
1434 | if (!strcmp("strict", str)) | |
1435 | acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; | |
1436 | else if (!strcmp("lax", str)) | |
1437 | acpi_enforce_resources = ENFORCE_RESOURCES_LAX; | |
1438 | else if (!strcmp("no", str)) | |
1439 | acpi_enforce_resources = ENFORCE_RESOURCES_NO; | |
1440 | ||
1441 | return 1; | |
1442 | } | |
1443 | ||
1444 | __setup("acpi_enforce_resources=", acpi_enforce_resources_setup); | |
1445 | ||
1446 | /* Check for resource conflicts between ACPI OperationRegions and native | |
1447 | * drivers */ | |
876fba43 | 1448 | int acpi_check_resource_conflict(const struct resource *res) |
df92e695 | 1449 | { |
f654c0fe LM |
1450 | acpi_adr_space_type space_id; |
1451 | acpi_size length; | |
1452 | u8 warn = 0; | |
1453 | int clash = 0; | |
df92e695 TR |
1454 | |
1455 | if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) | |
1456 | return 0; | |
1457 | if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM)) | |
1458 | return 0; | |
1459 | ||
f654c0fe LM |
1460 | if (res->flags & IORESOURCE_IO) |
1461 | space_id = ACPI_ADR_SPACE_SYSTEM_IO; | |
1462 | else | |
1463 | space_id = ACPI_ADR_SPACE_SYSTEM_MEMORY; | |
df92e695 | 1464 | |
e4f52244 | 1465 | length = resource_size(res); |
f654c0fe LM |
1466 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) |
1467 | warn = 1; | |
1468 | clash = acpi_check_address_range(space_id, res->start, length, warn); | |
df92e695 TR |
1469 | |
1470 | if (clash) { | |
1471 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) { | |
14f03343 JD |
1472 | if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX) |
1473 | printk(KERN_NOTICE "ACPI: This conflict may" | |
1474 | " cause random problems and system" | |
1475 | " instability\n"); | |
1476 | printk(KERN_INFO "ACPI: If an ACPI driver is available" | |
1477 | " for this device, you should use it instead of" | |
1478 | " the native driver\n"); | |
df92e695 TR |
1479 | } |
1480 | if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT) | |
1481 | return -EBUSY; | |
1482 | } | |
1483 | return 0; | |
1484 | } | |
443dea72 | 1485 | EXPORT_SYMBOL(acpi_check_resource_conflict); |
df92e695 TR |
1486 | |
1487 | int acpi_check_region(resource_size_t start, resource_size_t n, | |
1488 | const char *name) | |
1489 | { | |
1490 | struct resource res = { | |
1491 | .start = start, | |
1492 | .end = start + n - 1, | |
1493 | .name = name, | |
1494 | .flags = IORESOURCE_IO, | |
1495 | }; | |
1496 | ||
1497 | return acpi_check_resource_conflict(&res); | |
1498 | } | |
1499 | EXPORT_SYMBOL(acpi_check_region); | |
1500 | ||
d2d2e3c4 HK |
1501 | static acpi_status acpi_deactivate_mem_region(acpi_handle handle, u32 level, |
1502 | void *_res, void **return_value) | |
1503 | { | |
1504 | struct acpi_mem_space_context **mem_ctx; | |
1505 | union acpi_operand_object *handler_obj; | |
1506 | union acpi_operand_object *region_obj2; | |
1507 | union acpi_operand_object *region_obj; | |
1508 | struct resource *res = _res; | |
1509 | acpi_status status; | |
1510 | ||
1511 | region_obj = acpi_ns_get_attached_object(handle); | |
1512 | if (!region_obj) | |
1513 | return AE_OK; | |
1514 | ||
1515 | handler_obj = region_obj->region.handler; | |
1516 | if (!handler_obj) | |
1517 | return AE_OK; | |
1518 | ||
1519 | if (region_obj->region.space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) | |
1520 | return AE_OK; | |
1521 | ||
1522 | if (!(region_obj->region.flags & AOPOBJ_SETUP_COMPLETE)) | |
1523 | return AE_OK; | |
1524 | ||
1525 | region_obj2 = acpi_ns_get_secondary_object(region_obj); | |
1526 | if (!region_obj2) | |
1527 | return AE_OK; | |
1528 | ||
1529 | mem_ctx = (void *)®ion_obj2->extra.region_context; | |
1530 | ||
1531 | if (!(mem_ctx[0]->address >= res->start && | |
1532 | mem_ctx[0]->address < res->end)) | |
1533 | return AE_OK; | |
1534 | ||
1535 | status = handler_obj->address_space.setup(region_obj, | |
1536 | ACPI_REGION_DEACTIVATE, | |
1537 | NULL, (void **)mem_ctx); | |
1538 | if (ACPI_SUCCESS(status)) | |
1539 | region_obj->region.flags &= ~(AOPOBJ_SETUP_COMPLETE); | |
1540 | ||
1541 | return status; | |
1542 | } | |
1543 | ||
1544 | /** | |
1545 | * acpi_release_memory - Release any mappings done to a memory region | |
1546 | * @handle: Handle to namespace node | |
1547 | * @res: Memory resource | |
1548 | * @level: A level that terminates the search | |
1549 | * | |
1550 | * Walks through @handle and unmaps all SystemMemory Operation Regions that | |
1551 | * overlap with @res and that have already been activated (mapped). | |
1552 | * | |
1553 | * This is a helper that allows drivers to place special requirements on memory | |
1554 | * region that may overlap with operation regions, primarily allowing them to | |
1555 | * safely map the region as non-cached memory. | |
1556 | * | |
1557 | * The unmapped Operation Regions will be automatically remapped next time they | |
1558 | * are called, so the drivers do not need to do anything else. | |
1559 | */ | |
1560 | acpi_status acpi_release_memory(acpi_handle handle, struct resource *res, | |
1561 | u32 level) | |
1562 | { | |
1563 | if (!(res->flags & IORESOURCE_MEM)) | |
1564 | return AE_TYPE; | |
1565 | ||
1566 | return acpi_walk_namespace(ACPI_TYPE_REGION, handle, level, | |
1567 | acpi_deactivate_mem_region, NULL, res, NULL); | |
1568 | } | |
1569 | EXPORT_SYMBOL_GPL(acpi_release_memory); | |
1570 | ||
70dd6bea JD |
1571 | /* |
1572 | * Let drivers know whether the resource checks are effective | |
1573 | */ | |
1574 | int acpi_resources_are_enforced(void) | |
1575 | { | |
1576 | return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT; | |
1577 | } | |
1578 | EXPORT_SYMBOL(acpi_resources_are_enforced); | |
1579 | ||
9f63b88b LM |
1580 | /* |
1581 | * Deallocate the memory for a spinlock. | |
1582 | */ | |
1583 | void acpi_os_delete_lock(acpi_spinlock handle) | |
1584 | { | |
1585 | ACPI_FREE(handle); | |
1586 | } | |
1587 | ||
73459f73 RM |
1588 | /* |
1589 | * Acquire a spinlock. | |
1590 | * | |
1591 | * handle is a pointer to the spinlock_t. | |
73459f73 RM |
1592 | */ |
1593 | ||
967440e3 | 1594 | acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp) |
73459f73 | 1595 | { |
b8e4d893 | 1596 | acpi_cpu_flags flags; |
967440e3 | 1597 | spin_lock_irqsave(lockp, flags); |
73459f73 RM |
1598 | return flags; |
1599 | } | |
1600 | ||
1601 | /* | |
1602 | * Release a spinlock. See above. | |
1603 | */ | |
1604 | ||
967440e3 | 1605 | void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags) |
73459f73 | 1606 | { |
967440e3 | 1607 | spin_unlock_irqrestore(lockp, flags); |
73459f73 RM |
1608 | } |
1609 | ||
73459f73 RM |
1610 | #ifndef ACPI_USE_LOCAL_CACHE |
1611 | ||
1612 | /******************************************************************************* | |
1613 | * | |
1614 | * FUNCTION: acpi_os_create_cache | |
1615 | * | |
b229cf92 BM |
1616 | * PARAMETERS: name - Ascii name for the cache |
1617 | * size - Size of each cached object | |
1618 | * depth - Maximum depth of the cache (in objects) <ignored> | |
1619 | * cache - Where the new cache object is returned | |
73459f73 | 1620 | * |
b229cf92 | 1621 | * RETURN: status |
73459f73 RM |
1622 | * |
1623 | * DESCRIPTION: Create a cache object | |
1624 | * | |
1625 | ******************************************************************************/ | |
1626 | ||
1627 | acpi_status | |
4be44fcd | 1628 | acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache) |
73459f73 | 1629 | { |
20c2df83 | 1630 | *cache = kmem_cache_create(name, size, 0, 0, NULL); |
a6fdbf90 | 1631 | if (*cache == NULL) |
b229cf92 BM |
1632 | return AE_ERROR; |
1633 | else | |
1634 | return AE_OK; | |
73459f73 RM |
1635 | } |
1636 | ||
1637 | /******************************************************************************* | |
1638 | * | |
1639 | * FUNCTION: acpi_os_purge_cache | |
1640 | * | |
1641 | * PARAMETERS: Cache - Handle to cache object | |
1642 | * | |
1643 | * RETURN: Status | |
1644 | * | |
1645 | * DESCRIPTION: Free all objects within the requested cache. | |
1646 | * | |
1647 | ******************************************************************************/ | |
1648 | ||
4be44fcd | 1649 | acpi_status acpi_os_purge_cache(acpi_cache_t * cache) |
73459f73 | 1650 | { |
50dd0969 | 1651 | kmem_cache_shrink(cache); |
4be44fcd | 1652 | return (AE_OK); |
73459f73 RM |
1653 | } |
1654 | ||
1655 | /******************************************************************************* | |
1656 | * | |
1657 | * FUNCTION: acpi_os_delete_cache | |
1658 | * | |
1659 | * PARAMETERS: Cache - Handle to cache object | |
1660 | * | |
1661 | * RETURN: Status | |
1662 | * | |
1663 | * DESCRIPTION: Free all objects within the requested cache and delete the | |
1664 | * cache object. | |
1665 | * | |
1666 | ******************************************************************************/ | |
1667 | ||
4be44fcd | 1668 | acpi_status acpi_os_delete_cache(acpi_cache_t * cache) |
73459f73 | 1669 | { |
1a1d92c1 | 1670 | kmem_cache_destroy(cache); |
4be44fcd | 1671 | return (AE_OK); |
73459f73 RM |
1672 | } |
1673 | ||
1674 | /******************************************************************************* | |
1675 | * | |
1676 | * FUNCTION: acpi_os_release_object | |
1677 | * | |
1678 | * PARAMETERS: Cache - Handle to cache object | |
1679 | * Object - The object to be released | |
1680 | * | |
1681 | * RETURN: None | |
1682 | * | |
1683 | * DESCRIPTION: Release an object to the specified cache. If cache is full, | |
1684 | * the object is deleted. | |
1685 | * | |
1686 | ******************************************************************************/ | |
1687 | ||
4be44fcd | 1688 | acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object) |
73459f73 | 1689 | { |
4be44fcd LB |
1690 | kmem_cache_free(cache, object); |
1691 | return (AE_OK); | |
73459f73 | 1692 | } |
73459f73 | 1693 | #endif |
d362edaf | 1694 | |
a94e88cd | 1695 | static int __init acpi_no_static_ssdt_setup(char *s) |
b75dd297 | 1696 | { |
a94e88cd LZ |
1697 | acpi_gbl_disable_ssdt_table_install = TRUE; |
1698 | pr_info("ACPI: static SSDT installation disabled\n"); | |
b75dd297 | 1699 | |
a94e88cd | 1700 | return 0; |
b75dd297 LZ |
1701 | } |
1702 | ||
a94e88cd | 1703 | early_param("acpi_no_static_ssdt", acpi_no_static_ssdt_setup); |
b75dd297 | 1704 | |
4dde507f LZ |
1705 | static int __init acpi_disable_return_repair(char *s) |
1706 | { | |
1707 | printk(KERN_NOTICE PREFIX | |
1708 | "ACPI: Predefined validation mechanism disabled\n"); | |
1709 | acpi_gbl_disable_auto_repair = TRUE; | |
1710 | ||
1711 | return 1; | |
1712 | } | |
1713 | ||
1714 | __setup("acpica_no_return_repair", acpi_disable_return_repair); | |
1715 | ||
d362edaf MS |
1716 | acpi_status __init acpi_os_initialize(void) |
1717 | { | |
1718 | acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block); | |
1719 | acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block); | |
1720 | acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block); | |
1721 | acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block); | |
a4714a89 RW |
1722 | if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) { |
1723 | /* | |
1724 | * Use acpi_os_map_generic_address to pre-map the reset | |
1725 | * register if it's in system memory. | |
1726 | */ | |
1727 | int rv; | |
1728 | ||
1729 | rv = acpi_os_map_generic_address(&acpi_gbl_FADT.reset_register); | |
1730 | pr_debug(PREFIX "%s: map reset_reg status %d\n", __func__, rv); | |
1731 | } | |
7901a052 | 1732 | acpi_os_initialized = true; |
d362edaf MS |
1733 | |
1734 | return AE_OK; | |
1735 | } | |
1736 | ||
32d47eef | 1737 | acpi_status __init acpi_os_initialize1(void) |
d362edaf | 1738 | { |
44d2588e TH |
1739 | kacpid_wq = alloc_workqueue("kacpid", 0, 1); |
1740 | kacpi_notify_wq = alloc_workqueue("kacpi_notify", 0, 1); | |
d783156e | 1741 | kacpi_hotplug_wq = alloc_ordered_workqueue("kacpi_hotplug", 0); |
d362edaf MS |
1742 | BUG_ON(!kacpid_wq); |
1743 | BUG_ON(!kacpi_notify_wq); | |
1744 | BUG_ON(!kacpi_hotplug_wq); | |
e5f660eb | 1745 | acpi_osi_init(); |
d362edaf MS |
1746 | return AE_OK; |
1747 | } | |
1748 | ||
1749 | acpi_status acpi_os_terminate(void) | |
1750 | { | |
1751 | if (acpi_irq_handler) { | |
23fe3630 | 1752 | acpi_os_remove_interrupt_handler(acpi_gbl_FADT.sci_interrupt, |
d362edaf MS |
1753 | acpi_irq_handler); |
1754 | } | |
1755 | ||
1756 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe1_block); | |
1757 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block); | |
1758 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block); | |
1759 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block); | |
a4714a89 RW |
1760 | if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) |
1761 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.reset_register); | |
d362edaf MS |
1762 | |
1763 | destroy_workqueue(kacpid_wq); | |
1764 | destroy_workqueue(kacpi_notify_wq); | |
1765 | destroy_workqueue(kacpi_hotplug_wq); | |
1766 | ||
1767 | return AE_OK; | |
1768 | } | |
09f98a82 TL |
1769 | |
1770 | acpi_status acpi_os_prepare_sleep(u8 sleep_state, u32 pm1a_control, | |
1771 | u32 pm1b_control) | |
1772 | { | |
1773 | int rc = 0; | |
1774 | if (__acpi_os_prepare_sleep) | |
1775 | rc = __acpi_os_prepare_sleep(sleep_state, | |
1776 | pm1a_control, pm1b_control); | |
1777 | if (rc < 0) | |
1778 | return AE_ERROR; | |
1779 | else if (rc > 0) | |
0fc5e8f4 | 1780 | return AE_CTRL_TERMINATE; |
09f98a82 TL |
1781 | |
1782 | return AE_OK; | |
1783 | } | |
1784 | ||
1785 | void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state, | |
1786 | u32 pm1a_ctrl, u32 pm1b_ctrl)) | |
1787 | { | |
1788 | __acpi_os_prepare_sleep = func; | |
1789 | } | |
92d8aff3 | 1790 | |
0fc5e8f4 | 1791 | #if (ACPI_REDUCED_HARDWARE) |
d6b47b12 BG |
1792 | acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state, u32 val_a, |
1793 | u32 val_b) | |
1794 | { | |
1795 | int rc = 0; | |
1796 | if (__acpi_os_prepare_extended_sleep) | |
1797 | rc = __acpi_os_prepare_extended_sleep(sleep_state, | |
1798 | val_a, val_b); | |
1799 | if (rc < 0) | |
1800 | return AE_ERROR; | |
1801 | else if (rc > 0) | |
0fc5e8f4 | 1802 | return AE_CTRL_TERMINATE; |
d6b47b12 BG |
1803 | |
1804 | return AE_OK; | |
1805 | } | |
0fc5e8f4 LZ |
1806 | #else |
1807 | acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state, u32 val_a, | |
1808 | u32 val_b) | |
1809 | { | |
1810 | return AE_OK; | |
1811 | } | |
1812 | #endif | |
d6b47b12 BG |
1813 | |
1814 | void acpi_os_set_prepare_extended_sleep(int (*func)(u8 sleep_state, | |
1815 | u32 val_a, u32 val_b)) | |
1816 | { | |
1817 | __acpi_os_prepare_extended_sleep = func; | |
1818 | } | |
0fc5e8f4 LZ |
1819 | |
1820 | acpi_status acpi_os_enter_sleep(u8 sleep_state, | |
1821 | u32 reg_a_value, u32 reg_b_value) | |
1822 | { | |
1823 | acpi_status status; | |
1824 | ||
1825 | if (acpi_gbl_reduced_hardware) | |
1826 | status = acpi_os_prepare_extended_sleep(sleep_state, | |
1827 | reg_a_value, | |
1828 | reg_b_value); | |
1829 | else | |
1830 | status = acpi_os_prepare_sleep(sleep_state, | |
1831 | reg_a_value, reg_b_value); | |
1832 | return status; | |
1833 | } |