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1da177e4 LT |
1 | /* |
2 | * acpi_osl.c - OS-dependent functions ($Revision: 83 $) | |
3 | * | |
4 | * Copyright (C) 2000 Andrew Henroid | |
5 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> | |
6 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
f1241c87 MW |
7 | * Copyright (c) 2008 Intel Corporation |
8 | * Author: Matthew Wilcox <willy@linux.intel.com> | |
1da177e4 LT |
9 | * |
10 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2 of the License, or | |
15 | * (at your option) any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
1da177e4 LT |
22 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
23 | * | |
24 | */ | |
25 | ||
1da177e4 LT |
26 | #include <linux/module.h> |
27 | #include <linux/kernel.h> | |
28 | #include <linux/slab.h> | |
29 | #include <linux/mm.h> | |
ba242d5b | 30 | #include <linux/highmem.h> |
1da177e4 | 31 | #include <linux/pci.h> |
1da177e4 LT |
32 | #include <linux/interrupt.h> |
33 | #include <linux/kmod.h> | |
34 | #include <linux/delay.h> | |
35 | #include <linux/workqueue.h> | |
36 | #include <linux/nmi.h> | |
ad71860a | 37 | #include <linux/acpi.h> |
1da177e4 | 38 | #include <linux/efi.h> |
df92e695 TR |
39 | #include <linux/ioport.h> |
40 | #include <linux/list.h> | |
f1241c87 MW |
41 | #include <linux/jiffies.h> |
42 | #include <linux/semaphore.h> | |
43 | ||
44 | #include <asm/io.h> | |
45 | #include <asm/uaccess.h> | |
2f8e2c87 | 46 | #include <linux/io-64-nonatomic-lo-hi.h> |
f1241c87 | 47 | |
1129c92f | 48 | #include "internal.h" |
1da177e4 | 49 | |
1da177e4 | 50 | #define _COMPONENT ACPI_OS_SERVICES |
f52fd66d | 51 | ACPI_MODULE_NAME("osl"); |
07070e12 | 52 | |
4be44fcd LB |
53 | struct acpi_os_dpc { |
54 | acpi_osd_exec_callback function; | |
55 | void *context; | |
65f27f38 | 56 | struct work_struct work; |
1da177e4 LT |
57 | }; |
58 | ||
59 | #ifdef CONFIG_ACPI_CUSTOM_DSDT | |
60 | #include CONFIG_ACPI_CUSTOM_DSDT_FILE | |
61 | #endif | |
62 | ||
63 | #ifdef ENABLE_DEBUGGER | |
64 | #include <linux/kdb.h> | |
65 | ||
66 | /* stuff for debugger support */ | |
67 | int acpi_in_debugger; | |
68 | EXPORT_SYMBOL(acpi_in_debugger); | |
4be44fcd | 69 | #endif /*ENABLE_DEBUGGER */ |
1da177e4 | 70 | |
09f98a82 TL |
71 | static int (*__acpi_os_prepare_sleep)(u8 sleep_state, u32 pm1a_ctrl, |
72 | u32 pm1b_ctrl); | |
d6b47b12 BG |
73 | static int (*__acpi_os_prepare_extended_sleep)(u8 sleep_state, u32 val_a, |
74 | u32 val_b); | |
09f98a82 | 75 | |
1da177e4 LT |
76 | static acpi_osd_handler acpi_irq_handler; |
77 | static void *acpi_irq_context; | |
78 | static struct workqueue_struct *kacpid_wq; | |
88db5e14 | 79 | static struct workqueue_struct *kacpi_notify_wq; |
92d8aff3 | 80 | static struct workqueue_struct *kacpi_hotplug_wq; |
7901a052 | 81 | static bool acpi_os_initialized; |
49e4b843 | 82 | unsigned int acpi_sci_irq = INVALID_ACPI_IRQ; |
1da177e4 | 83 | |
620242ae MS |
84 | /* |
85 | * This list of permanent mappings is for memory that may be accessed from | |
86 | * interrupt context, where we can't do the ioremap(). | |
87 | */ | |
88 | struct acpi_ioremap { | |
89 | struct list_head list; | |
90 | void __iomem *virt; | |
91 | acpi_physical_address phys; | |
92 | acpi_size size; | |
b7c1fadd | 93 | unsigned long refcount; |
620242ae MS |
94 | }; |
95 | ||
96 | static LIST_HEAD(acpi_ioremaps); | |
7bbb8903 | 97 | static DEFINE_MUTEX(acpi_ioremap_lock); |
620242ae | 98 | |
b0ed7a91 | 99 | static void __init acpi_osi_setup_late(void); |
ae00d812 | 100 | |
d4b7dc49 | 101 | /* |
a6e0887f | 102 | * The story of _OSI(Linux) |
d4b7dc49 | 103 | * |
a6e0887f LB |
104 | * From pre-history through Linux-2.6.22, |
105 | * Linux responded TRUE upon a BIOS OSI(Linux) query. | |
d4b7dc49 | 106 | * |
a6e0887f LB |
107 | * Unfortunately, reference BIOS writers got wind of this |
108 | * and put OSI(Linux) in their example code, quickly exposing | |
109 | * this string as ill-conceived and opening the door to | |
110 | * an un-bounded number of BIOS incompatibilities. | |
d4b7dc49 | 111 | * |
a6e0887f LB |
112 | * For example, OSI(Linux) was used on resume to re-POST a |
113 | * video card on one system, because Linux at that time | |
114 | * could not do a speedy restore in its native driver. | |
115 | * But then upon gaining quick native restore capability, | |
116 | * Linux has no way to tell the BIOS to skip the time-consuming | |
117 | * POST -- putting Linux at a permanent performance disadvantage. | |
118 | * On another system, the BIOS writer used OSI(Linux) | |
119 | * to infer native OS support for IPMI! On other systems, | |
120 | * OSI(Linux) simply got in the way of Linux claiming to | |
121 | * be compatible with other operating systems, exposing | |
122 | * BIOS issues such as skipped device initialization. | |
d4b7dc49 | 123 | * |
a6e0887f LB |
124 | * So "Linux" turned out to be a really poor chose of |
125 | * OSI string, and from Linux-2.6.23 onward we respond FALSE. | |
d4b7dc49 LB |
126 | * |
127 | * BIOS writers should NOT query _OSI(Linux) on future systems. | |
a6e0887f LB |
128 | * Linux will complain on the console when it sees it, and return FALSE. |
129 | * To get Linux to return TRUE for your system will require | |
130 | * a kernel source update to add a DMI entry, | |
131 | * or boot with "acpi_osi=Linux" | |
d4b7dc49 | 132 | */ |
d4b7dc49 | 133 | |
dbee890b LZ |
134 | static struct acpi_osi_config { |
135 | unsigned int linux_enable:1; | |
136 | unsigned int linux_dmi:1; | |
137 | unsigned int linux_cmdline:1; | |
30c9bb0d | 138 | u8 default_disabling; |
dbee890b | 139 | } osi_config = {0, 0, 0, 0}; |
f507654d | 140 | |
b0ed7a91 LM |
141 | static u32 acpi_osi_handler(acpi_string interface, u32 supported) |
142 | { | |
143 | if (!strcmp("Linux", interface)) { | |
144 | ||
8997621b | 145 | printk_once(KERN_NOTICE FW_BUG PREFIX |
b0ed7a91 | 146 | "BIOS _OSI(Linux) query %s%s\n", |
dbee890b LZ |
147 | osi_config.linux_enable ? "honored" : "ignored", |
148 | osi_config.linux_cmdline ? " via cmdline" : | |
149 | osi_config.linux_dmi ? " via DMI" : ""); | |
b0ed7a91 LM |
150 | } |
151 | ||
7bc5a2ba MG |
152 | if (!strcmp("Darwin", interface)) { |
153 | /* | |
154 | * Apple firmware will behave poorly if it receives positive | |
155 | * answers to "Darwin" and any other OS. Respond positively | |
156 | * to Darwin and then disable all other vendor strings. | |
157 | */ | |
158 | acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS); | |
159 | supported = ACPI_UINT32_MAX; | |
160 | } | |
161 | ||
b0ed7a91 LM |
162 | return supported; |
163 | } | |
164 | ||
bc9ffce2 | 165 | static void __init acpi_request_region (struct acpi_generic_address *gas, |
9a47cdb1 BH |
166 | unsigned int length, char *desc) |
167 | { | |
bc9ffce2 MS |
168 | u64 addr; |
169 | ||
170 | /* Handle possible alignment issues */ | |
171 | memcpy(&addr, &gas->address, sizeof(addr)); | |
172 | if (!addr || !length) | |
9a47cdb1 BH |
173 | return; |
174 | ||
0294112e RW |
175 | /* Resources are never freed */ |
176 | if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_IO) | |
177 | request_region(addr, length, desc); | |
178 | else if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) | |
179 | request_mem_region(addr, length, desc); | |
9a47cdb1 BH |
180 | } |
181 | ||
0294112e | 182 | static int __init acpi_reserve_resources(void) |
9a47cdb1 | 183 | { |
eee3c859 | 184 | acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
185 | "ACPI PM1a_EVT_BLK"); |
186 | ||
eee3c859 | 187 | acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
188 | "ACPI PM1b_EVT_BLK"); |
189 | ||
eee3c859 | 190 | acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
191 | "ACPI PM1a_CNT_BLK"); |
192 | ||
eee3c859 | 193 | acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
194 | "ACPI PM1b_CNT_BLK"); |
195 | ||
eee3c859 LB |
196 | if (acpi_gbl_FADT.pm_timer_length == 4) |
197 | acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR"); | |
9a47cdb1 | 198 | |
eee3c859 | 199 | acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length, |
9a47cdb1 BH |
200 | "ACPI PM2_CNT_BLK"); |
201 | ||
202 | /* Length of GPE blocks must be a non-negative multiple of 2 */ | |
203 | ||
eee3c859 LB |
204 | if (!(acpi_gbl_FADT.gpe0_block_length & 0x1)) |
205 | acpi_request_region(&acpi_gbl_FADT.xgpe0_block, | |
206 | acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK"); | |
9a47cdb1 | 207 | |
eee3c859 LB |
208 | if (!(acpi_gbl_FADT.gpe1_block_length & 0x1)) |
209 | acpi_request_region(&acpi_gbl_FADT.xgpe1_block, | |
210 | acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK"); | |
0294112e RW |
211 | |
212 | return 0; | |
9a47cdb1 | 213 | } |
0294112e | 214 | fs_initcall_sync(acpi_reserve_resources); |
9a47cdb1 | 215 | |
4be44fcd | 216 | void acpi_os_printf(const char *fmt, ...) |
1da177e4 LT |
217 | { |
218 | va_list args; | |
219 | va_start(args, fmt); | |
220 | acpi_os_vprintf(fmt, args); | |
221 | va_end(args); | |
222 | } | |
836d0830 | 223 | EXPORT_SYMBOL(acpi_os_printf); |
4be44fcd | 224 | |
4be44fcd | 225 | void acpi_os_vprintf(const char *fmt, va_list args) |
1da177e4 LT |
226 | { |
227 | static char buffer[512]; | |
4be44fcd | 228 | |
1da177e4 LT |
229 | vsprintf(buffer, fmt, args); |
230 | ||
231 | #ifdef ENABLE_DEBUGGER | |
232 | if (acpi_in_debugger) { | |
233 | kdb_printf("%s", buffer); | |
234 | } else { | |
4d939155 | 235 | printk(KERN_CONT "%s", buffer); |
1da177e4 LT |
236 | } |
237 | #else | |
836d0830 | 238 | if (acpi_debugger_write_log(buffer) < 0) |
8cfb0cdf | 239 | printk(KERN_CONT "%s", buffer); |
1da177e4 LT |
240 | #endif |
241 | } | |
242 | ||
4996c023 TI |
243 | #ifdef CONFIG_KEXEC |
244 | static unsigned long acpi_rsdp; | |
245 | static int __init setup_acpi_rsdp(char *arg) | |
246 | { | |
3d915894 CJ |
247 | if (kstrtoul(arg, 16, &acpi_rsdp)) |
248 | return -EINVAL; | |
4996c023 TI |
249 | return 0; |
250 | } | |
251 | early_param("acpi_rsdp", setup_acpi_rsdp); | |
252 | #endif | |
253 | ||
ad71860a | 254 | acpi_physical_address __init acpi_os_get_root_pointer(void) |
1da177e4 | 255 | { |
4996c023 TI |
256 | #ifdef CONFIG_KEXEC |
257 | if (acpi_rsdp) | |
258 | return acpi_rsdp; | |
259 | #endif | |
260 | ||
83e68189 | 261 | if (efi_enabled(EFI_CONFIG_TABLES)) { |
b2c99e3c | 262 | if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) |
ad71860a | 263 | return efi.acpi20; |
b2c99e3c | 264 | else if (efi.acpi != EFI_INVALID_TABLE_ADDR) |
ad71860a | 265 | return efi.acpi; |
1da177e4 | 266 | else { |
4be44fcd LB |
267 | printk(KERN_ERR PREFIX |
268 | "System description tables not found\n"); | |
ad71860a | 269 | return 0; |
1da177e4 | 270 | } |
8a1664be | 271 | } else if (IS_ENABLED(CONFIG_ACPI_LEGACY_TABLES_LOOKUP)) { |
239665a3 LB |
272 | acpi_physical_address pa = 0; |
273 | ||
274 | acpi_find_root_pointer(&pa); | |
275 | return pa; | |
276 | } | |
8a1664be GG |
277 | |
278 | return 0; | |
1da177e4 LT |
279 | } |
280 | ||
78cdb3ed | 281 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ |
4a3cba5e MS |
282 | static struct acpi_ioremap * |
283 | acpi_map_lookup(acpi_physical_address phys, acpi_size size) | |
620242ae MS |
284 | { |
285 | struct acpi_ioremap *map; | |
286 | ||
78cdb3ed | 287 | list_for_each_entry_rcu(map, &acpi_ioremaps, list) |
620242ae MS |
288 | if (map->phys <= phys && |
289 | phys + size <= map->phys + map->size) | |
4a3cba5e MS |
290 | return map; |
291 | ||
292 | return NULL; | |
293 | } | |
294 | ||
295 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ | |
296 | static void __iomem * | |
297 | acpi_map_vaddr_lookup(acpi_physical_address phys, unsigned int size) | |
298 | { | |
299 | struct acpi_ioremap *map; | |
300 | ||
301 | map = acpi_map_lookup(phys, size); | |
302 | if (map) | |
303 | return map->virt + (phys - map->phys); | |
620242ae MS |
304 | |
305 | return NULL; | |
306 | } | |
307 | ||
13606a2d RW |
308 | void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size) |
309 | { | |
310 | struct acpi_ioremap *map; | |
311 | void __iomem *virt = NULL; | |
312 | ||
313 | mutex_lock(&acpi_ioremap_lock); | |
314 | map = acpi_map_lookup(phys, size); | |
315 | if (map) { | |
316 | virt = map->virt + (phys - map->phys); | |
317 | map->refcount++; | |
318 | } | |
319 | mutex_unlock(&acpi_ioremap_lock); | |
320 | return virt; | |
321 | } | |
322 | EXPORT_SYMBOL_GPL(acpi_os_get_iomem); | |
323 | ||
78cdb3ed | 324 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ |
620242ae MS |
325 | static struct acpi_ioremap * |
326 | acpi_map_lookup_virt(void __iomem *virt, acpi_size size) | |
327 | { | |
328 | struct acpi_ioremap *map; | |
329 | ||
78cdb3ed | 330 | list_for_each_entry_rcu(map, &acpi_ioremaps, list) |
4a3cba5e MS |
331 | if (map->virt <= virt && |
332 | virt + size <= map->virt + map->size) | |
620242ae MS |
333 | return map; |
334 | ||
335 | return NULL; | |
336 | } | |
337 | ||
aafc65c7 | 338 | #if defined(CONFIG_IA64) || defined(CONFIG_ARM64) |
ba242d5b MS |
339 | /* ioremap will take care of cache attributes */ |
340 | #define should_use_kmap(pfn) 0 | |
aafc65c7 GG |
341 | #else |
342 | #define should_use_kmap(pfn) page_is_ram(pfn) | |
ba242d5b MS |
343 | #endif |
344 | ||
345 | static void __iomem *acpi_map(acpi_physical_address pg_off, unsigned long pg_sz) | |
346 | { | |
347 | unsigned long pfn; | |
348 | ||
349 | pfn = pg_off >> PAGE_SHIFT; | |
350 | if (should_use_kmap(pfn)) { | |
351 | if (pg_sz > PAGE_SIZE) | |
352 | return NULL; | |
353 | return (void __iomem __force *)kmap(pfn_to_page(pfn)); | |
354 | } else | |
355 | return acpi_os_ioremap(pg_off, pg_sz); | |
356 | } | |
357 | ||
358 | static void acpi_unmap(acpi_physical_address pg_off, void __iomem *vaddr) | |
359 | { | |
360 | unsigned long pfn; | |
361 | ||
362 | pfn = pg_off >> PAGE_SHIFT; | |
e252675f | 363 | if (should_use_kmap(pfn)) |
ba242d5b MS |
364 | kunmap(pfn_to_page(pfn)); |
365 | else | |
366 | iounmap(vaddr); | |
367 | } | |
368 | ||
9d128ed1 RW |
369 | /** |
370 | * acpi_os_map_iomem - Get a virtual address for a given physical address range. | |
371 | * @phys: Start of the physical address range to map. | |
372 | * @size: Size of the physical address range to map. | |
373 | * | |
374 | * Look up the given physical address range in the list of existing ACPI memory | |
375 | * mappings. If found, get a reference to it and return a pointer to it (its | |
376 | * virtual address). If not found, map it, add it to that list and return a | |
377 | * pointer to it. | |
378 | * | |
379 | * During early init (when acpi_gbl_permanent_mmap has not been set yet) this | |
380 | * routine simply calls __acpi_map_table() to get the job done. | |
381 | */ | |
2fdf0741 | 382 | void __iomem *__init_refok |
a238317c | 383 | acpi_os_map_iomem(acpi_physical_address phys, acpi_size size) |
1da177e4 | 384 | { |
7ffd0443 | 385 | struct acpi_ioremap *map; |
620242ae | 386 | void __iomem *virt; |
2d6d9fd3 RW |
387 | acpi_physical_address pg_off; |
388 | acpi_size pg_sz; | |
620242ae | 389 | |
9f4fd61f BH |
390 | if (phys > ULONG_MAX) { |
391 | printk(KERN_ERR PREFIX "Cannot map memory that high\n"); | |
70c0846e | 392 | return NULL; |
1da177e4 | 393 | } |
620242ae MS |
394 | |
395 | if (!acpi_gbl_permanent_mmap) | |
ad71860a | 396 | return __acpi_map_table((unsigned long)phys, size); |
620242ae | 397 | |
7ffd0443 RW |
398 | mutex_lock(&acpi_ioremap_lock); |
399 | /* Check if there's a suitable mapping already. */ | |
400 | map = acpi_map_lookup(phys, size); | |
401 | if (map) { | |
b7c1fadd | 402 | map->refcount++; |
7ffd0443 RW |
403 | goto out; |
404 | } | |
405 | ||
620242ae | 406 | map = kzalloc(sizeof(*map), GFP_KERNEL); |
7ffd0443 RW |
407 | if (!map) { |
408 | mutex_unlock(&acpi_ioremap_lock); | |
620242ae | 409 | return NULL; |
7ffd0443 | 410 | } |
620242ae | 411 | |
4a3cba5e MS |
412 | pg_off = round_down(phys, PAGE_SIZE); |
413 | pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off; | |
ba242d5b | 414 | virt = acpi_map(pg_off, pg_sz); |
620242ae | 415 | if (!virt) { |
7ffd0443 | 416 | mutex_unlock(&acpi_ioremap_lock); |
620242ae MS |
417 | kfree(map); |
418 | return NULL; | |
419 | } | |
420 | ||
421 | INIT_LIST_HEAD(&map->list); | |
422 | map->virt = virt; | |
4a3cba5e MS |
423 | map->phys = pg_off; |
424 | map->size = pg_sz; | |
b7c1fadd | 425 | map->refcount = 1; |
620242ae | 426 | |
78cdb3ed | 427 | list_add_tail_rcu(&map->list, &acpi_ioremaps); |
620242ae | 428 | |
a238317c | 429 | out: |
7ffd0443 | 430 | mutex_unlock(&acpi_ioremap_lock); |
4a3cba5e | 431 | return map->virt + (phys - map->phys); |
1da177e4 | 432 | } |
a238317c LZ |
433 | EXPORT_SYMBOL_GPL(acpi_os_map_iomem); |
434 | ||
435 | void *__init_refok | |
436 | acpi_os_map_memory(acpi_physical_address phys, acpi_size size) | |
437 | { | |
438 | return (void *)acpi_os_map_iomem(phys, size); | |
439 | } | |
55a82ab3 | 440 | EXPORT_SYMBOL_GPL(acpi_os_map_memory); |
1da177e4 | 441 | |
b7c1fadd | 442 | static void acpi_os_drop_map_ref(struct acpi_ioremap *map) |
4a3cba5e | 443 | { |
b7c1fadd RW |
444 | if (!--map->refcount) |
445 | list_del_rcu(&map->list); | |
4a3cba5e | 446 | } |
4a3cba5e | 447 | |
b7c1fadd | 448 | static void acpi_os_map_cleanup(struct acpi_ioremap *map) |
7fe135dc | 449 | { |
b7c1fadd | 450 | if (!map->refcount) { |
74b51ee1 | 451 | synchronize_rcu_expedited(); |
ba242d5b | 452 | acpi_unmap(map->phys, map->virt); |
b7c1fadd RW |
453 | kfree(map); |
454 | } | |
4a3cba5e MS |
455 | } |
456 | ||
9d128ed1 RW |
457 | /** |
458 | * acpi_os_unmap_iomem - Drop a memory mapping reference. | |
459 | * @virt: Start of the address range to drop a reference to. | |
460 | * @size: Size of the address range to drop a reference to. | |
461 | * | |
462 | * Look up the given virtual address range in the list of existing ACPI memory | |
463 | * mappings, drop a reference to it and unmap it if there are no more active | |
464 | * references to it. | |
465 | * | |
466 | * During early init (when acpi_gbl_permanent_mmap has not been set yet) this | |
467 | * routine simply calls __acpi_unmap_table() to get the job done. Since | |
468 | * __acpi_unmap_table() is an __init function, the __ref annotation is needed | |
469 | * here. | |
470 | */ | |
a238317c | 471 | void __ref acpi_os_unmap_iomem(void __iomem *virt, acpi_size size) |
1da177e4 | 472 | { |
620242ae | 473 | struct acpi_ioremap *map; |
620242ae MS |
474 | |
475 | if (!acpi_gbl_permanent_mmap) { | |
7d97277b | 476 | __acpi_unmap_table(virt, size); |
620242ae MS |
477 | return; |
478 | } | |
479 | ||
7bbb8903 | 480 | mutex_lock(&acpi_ioremap_lock); |
620242ae MS |
481 | map = acpi_map_lookup_virt(virt, size); |
482 | if (!map) { | |
7bbb8903 | 483 | mutex_unlock(&acpi_ioremap_lock); |
7fe135dc | 484 | WARN(true, PREFIX "%s: bad address %p\n", __func__, virt); |
620242ae MS |
485 | return; |
486 | } | |
b7c1fadd | 487 | acpi_os_drop_map_ref(map); |
7bbb8903 | 488 | mutex_unlock(&acpi_ioremap_lock); |
620242ae | 489 | |
b7c1fadd | 490 | acpi_os_map_cleanup(map); |
1da177e4 | 491 | } |
a238317c LZ |
492 | EXPORT_SYMBOL_GPL(acpi_os_unmap_iomem); |
493 | ||
494 | void __ref acpi_os_unmap_memory(void *virt, acpi_size size) | |
495 | { | |
496 | return acpi_os_unmap_iomem((void __iomem *)virt, size); | |
497 | } | |
55a82ab3 | 498 | EXPORT_SYMBOL_GPL(acpi_os_unmap_memory); |
1da177e4 | 499 | |
0d3a9cf5 | 500 | void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size) |
7d97277b YL |
501 | { |
502 | if (!acpi_gbl_permanent_mmap) | |
503 | __acpi_unmap_table(virt, size); | |
504 | } | |
505 | ||
6f68c91c | 506 | int acpi_os_map_generic_address(struct acpi_generic_address *gas) |
29718521 | 507 | { |
bc9ffce2 | 508 | u64 addr; |
29718521 MS |
509 | void __iomem *virt; |
510 | ||
bc9ffce2 | 511 | if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) |
29718521 MS |
512 | return 0; |
513 | ||
bc9ffce2 MS |
514 | /* Handle possible alignment issues */ |
515 | memcpy(&addr, &gas->address, sizeof(addr)); | |
516 | if (!addr || !gas->bit_width) | |
29718521 MS |
517 | return -EINVAL; |
518 | ||
a238317c | 519 | virt = acpi_os_map_iomem(addr, gas->bit_width / 8); |
29718521 MS |
520 | if (!virt) |
521 | return -EIO; | |
522 | ||
523 | return 0; | |
524 | } | |
6f68c91c | 525 | EXPORT_SYMBOL(acpi_os_map_generic_address); |
29718521 | 526 | |
6f68c91c | 527 | void acpi_os_unmap_generic_address(struct acpi_generic_address *gas) |
29718521 | 528 | { |
bc9ffce2 | 529 | u64 addr; |
7fe135dc | 530 | struct acpi_ioremap *map; |
29718521 | 531 | |
bc9ffce2 | 532 | if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) |
29718521 MS |
533 | return; |
534 | ||
bc9ffce2 MS |
535 | /* Handle possible alignment issues */ |
536 | memcpy(&addr, &gas->address, sizeof(addr)); | |
537 | if (!addr || !gas->bit_width) | |
29718521 MS |
538 | return; |
539 | ||
7bbb8903 | 540 | mutex_lock(&acpi_ioremap_lock); |
bc9ffce2 | 541 | map = acpi_map_lookup(addr, gas->bit_width / 8); |
7fe135dc RW |
542 | if (!map) { |
543 | mutex_unlock(&acpi_ioremap_lock); | |
544 | return; | |
545 | } | |
b7c1fadd | 546 | acpi_os_drop_map_ref(map); |
7bbb8903 | 547 | mutex_unlock(&acpi_ioremap_lock); |
29718521 | 548 | |
b7c1fadd | 549 | acpi_os_map_cleanup(map); |
29718521 | 550 | } |
6f68c91c | 551 | EXPORT_SYMBOL(acpi_os_unmap_generic_address); |
29718521 | 552 | |
1da177e4 LT |
553 | #ifdef ACPI_FUTURE_USAGE |
554 | acpi_status | |
4be44fcd | 555 | acpi_os_get_physical_address(void *virt, acpi_physical_address * phys) |
1da177e4 | 556 | { |
4be44fcd | 557 | if (!phys || !virt) |
1da177e4 LT |
558 | return AE_BAD_PARAMETER; |
559 | ||
560 | *phys = virt_to_phys(virt); | |
561 | ||
562 | return AE_OK; | |
563 | } | |
564 | #endif | |
565 | ||
18d78b64 RW |
566 | #ifdef CONFIG_ACPI_REV_OVERRIDE_POSSIBLE |
567 | static bool acpi_rev_override; | |
568 | ||
569 | int __init acpi_rev_override_setup(char *str) | |
570 | { | |
571 | acpi_rev_override = true; | |
572 | return 1; | |
573 | } | |
574 | __setup("acpi_rev_override", acpi_rev_override_setup); | |
575 | #else | |
576 | #define acpi_rev_override false | |
577 | #endif | |
578 | ||
1da177e4 LT |
579 | #define ACPI_MAX_OVERRIDE_LEN 100 |
580 | ||
581 | static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN]; | |
582 | ||
583 | acpi_status | |
4be44fcd | 584 | acpi_os_predefined_override(const struct acpi_predefined_names *init_val, |
2bad7e27 | 585 | char **new_val) |
1da177e4 LT |
586 | { |
587 | if (!init_val || !new_val) | |
588 | return AE_BAD_PARAMETER; | |
589 | ||
590 | *new_val = NULL; | |
4be44fcd | 591 | if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) { |
1da177e4 | 592 | printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n", |
4be44fcd | 593 | acpi_os_name); |
1da177e4 LT |
594 | *new_val = acpi_os_name; |
595 | } | |
596 | ||
18d78b64 RW |
597 | if (!memcmp(init_val->name, "_REV", 4) && acpi_rev_override) { |
598 | printk(KERN_INFO PREFIX "Overriding _REV return value to 5\n"); | |
599 | *new_val = (char *)5; | |
600 | } | |
601 | ||
1da177e4 LT |
602 | return AE_OK; |
603 | } | |
604 | ||
a543132e LZ |
605 | static void acpi_table_taint(struct acpi_table_header *table) |
606 | { | |
607 | pr_warn(PREFIX | |
608 | "Override [%4.4s-%8.8s], this is unsafe: tainting kernel\n", | |
609 | table->signature, table->oem_table_id); | |
610 | add_taint(TAINT_OVERRIDDEN_ACPI_TABLE, LOCKDEP_NOW_UNRELIABLE); | |
611 | } | |
612 | ||
53aac44c TR |
613 | #ifdef CONFIG_ACPI_INITRD_TABLE_OVERRIDE |
614 | #include <linux/earlycpio.h> | |
615 | #include <linux/memblock.h> | |
616 | ||
617 | static u64 acpi_tables_addr; | |
618 | static int all_tables_size; | |
619 | ||
620 | /* Copied from acpica/tbutils.c:acpi_tb_checksum() */ | |
66e162b3 | 621 | static u8 __init acpi_table_checksum(u8 *buffer, u32 length) |
53aac44c TR |
622 | { |
623 | u8 sum = 0; | |
624 | u8 *end = buffer + length; | |
625 | ||
626 | while (buffer < end) | |
627 | sum = (u8) (sum + *(buffer++)); | |
628 | return sum; | |
629 | } | |
630 | ||
631 | /* All but ACPI_SIG_RSDP and ACPI_SIG_FACS: */ | |
632 | static const char * const table_sigs[] = { | |
633 | ACPI_SIG_BERT, ACPI_SIG_CPEP, ACPI_SIG_ECDT, ACPI_SIG_EINJ, | |
634 | ACPI_SIG_ERST, ACPI_SIG_HEST, ACPI_SIG_MADT, ACPI_SIG_MSCT, | |
635 | ACPI_SIG_SBST, ACPI_SIG_SLIT, ACPI_SIG_SRAT, ACPI_SIG_ASF, | |
636 | ACPI_SIG_BOOT, ACPI_SIG_DBGP, ACPI_SIG_DMAR, ACPI_SIG_HPET, | |
637 | ACPI_SIG_IBFT, ACPI_SIG_IVRS, ACPI_SIG_MCFG, ACPI_SIG_MCHI, | |
638 | ACPI_SIG_SLIC, ACPI_SIG_SPCR, ACPI_SIG_SPMI, ACPI_SIG_TCPA, | |
639 | ACPI_SIG_UEFI, ACPI_SIG_WAET, ACPI_SIG_WDAT, ACPI_SIG_WDDT, | |
640 | ACPI_SIG_WDRT, ACPI_SIG_DSDT, ACPI_SIG_FADT, ACPI_SIG_PSDT, | |
641 | ACPI_SIG_RSDT, ACPI_SIG_XSDT, ACPI_SIG_SSDT, NULL }; | |
642 | ||
53aac44c TR |
643 | #define ACPI_HEADER_SIZE sizeof(struct acpi_table_header) |
644 | ||
bee7f9c8 YL |
645 | #define ACPI_OVERRIDE_TABLES 64 |
646 | static struct cpio_data __initdata acpi_initrd_files[ACPI_OVERRIDE_TABLES]; | |
c85cc817 | 647 | static DECLARE_BITMAP(acpi_initrd_installed, ACPI_OVERRIDE_TABLES); |
bee7f9c8 YL |
648 | |
649 | #define MAP_CHUNK_SIZE (NR_FIX_BTMAPS << PAGE_SHIFT) | |
53aac44c TR |
650 | |
651 | void __init acpi_initrd_override(void *data, size_t size) | |
652 | { | |
653 | int sig, no, table_nr = 0, total_offset = 0; | |
654 | long offset = 0; | |
655 | struct acpi_table_header *table; | |
656 | char cpio_path[32] = "kernel/firmware/acpi/"; | |
657 | struct cpio_data file; | |
53aac44c TR |
658 | |
659 | if (data == NULL || size == 0) | |
660 | return; | |
661 | ||
662 | for (no = 0; no < ACPI_OVERRIDE_TABLES; no++) { | |
663 | file = find_cpio_data(cpio_path, data, size, &offset); | |
664 | if (!file.data) | |
665 | break; | |
666 | ||
667 | data += offset; | |
668 | size -= offset; | |
669 | ||
7702ae0d TC |
670 | if (file.size < sizeof(struct acpi_table_header)) { |
671 | pr_err("ACPI OVERRIDE: Table smaller than ACPI header [%s%s]\n", | |
672 | cpio_path, file.name); | |
673 | continue; | |
674 | } | |
53aac44c TR |
675 | |
676 | table = file.data; | |
677 | ||
678 | for (sig = 0; table_sigs[sig]; sig++) | |
679 | if (!memcmp(table->signature, table_sigs[sig], 4)) | |
680 | break; | |
681 | ||
7702ae0d TC |
682 | if (!table_sigs[sig]) { |
683 | pr_err("ACPI OVERRIDE: Unknown signature [%s%s]\n", | |
684 | cpio_path, file.name); | |
685 | continue; | |
686 | } | |
687 | if (file.size != table->length) { | |
688 | pr_err("ACPI OVERRIDE: File length does not match table length [%s%s]\n", | |
689 | cpio_path, file.name); | |
690 | continue; | |
691 | } | |
692 | if (acpi_table_checksum(file.data, table->length)) { | |
693 | pr_err("ACPI OVERRIDE: Bad table checksum [%s%s]\n", | |
694 | cpio_path, file.name); | |
695 | continue; | |
696 | } | |
53aac44c TR |
697 | |
698 | pr_info("%4.4s ACPI table found in initrd [%s%s][0x%x]\n", | |
699 | table->signature, cpio_path, file.name, table->length); | |
700 | ||
701 | all_tables_size += table->length; | |
bee7f9c8 YL |
702 | acpi_initrd_files[table_nr].data = file.data; |
703 | acpi_initrd_files[table_nr].size = file.size; | |
53aac44c TR |
704 | table_nr++; |
705 | } | |
706 | if (table_nr == 0) | |
707 | return; | |
708 | ||
709 | acpi_tables_addr = | |
710 | memblock_find_in_range(0, max_low_pfn_mapped << PAGE_SHIFT, | |
711 | all_tables_size, PAGE_SIZE); | |
712 | if (!acpi_tables_addr) { | |
713 | WARN_ON(1); | |
714 | return; | |
715 | } | |
716 | /* | |
717 | * Only calling e820_add_reserve does not work and the | |
718 | * tables are invalid (memory got used) later. | |
719 | * memblock_reserve works as expected and the tables won't get modified. | |
720 | * But it's not enough on X86 because ioremap will | |
721 | * complain later (used by acpi_os_map_memory) that the pages | |
722 | * that should get mapped are not marked "reserved". | |
723 | * Both memblock_reserve and e820_add_region (via arch_reserve_mem_area) | |
724 | * works fine. | |
725 | */ | |
a6432ded | 726 | memblock_reserve(acpi_tables_addr, all_tables_size); |
53aac44c TR |
727 | arch_reserve_mem_area(acpi_tables_addr, all_tables_size); |
728 | ||
bee7f9c8 YL |
729 | /* |
730 | * early_ioremap only can remap 256k one time. If we map all | |
731 | * tables one time, we will hit the limit. Need to map chunks | |
732 | * one by one during copying the same as that in relocate_initrd(). | |
733 | */ | |
53aac44c | 734 | for (no = 0; no < table_nr; no++) { |
bee7f9c8 YL |
735 | unsigned char *src_p = acpi_initrd_files[no].data; |
736 | phys_addr_t size = acpi_initrd_files[no].size; | |
737 | phys_addr_t dest_addr = acpi_tables_addr + total_offset; | |
738 | phys_addr_t slop, clen; | |
739 | char *dest_p; | |
740 | ||
741 | total_offset += size; | |
742 | ||
743 | while (size) { | |
744 | slop = dest_addr & ~PAGE_MASK; | |
745 | clen = size; | |
746 | if (clen > MAP_CHUNK_SIZE - slop) | |
747 | clen = MAP_CHUNK_SIZE - slop; | |
748 | dest_p = early_ioremap(dest_addr & PAGE_MASK, | |
749 | clen + slop); | |
750 | memcpy(dest_p + slop, src_p, clen); | |
751 | early_iounmap(dest_p, clen + slop); | |
752 | src_p += clen; | |
753 | dest_addr += clen; | |
754 | size -= clen; | |
755 | } | |
53aac44c | 756 | } |
53aac44c | 757 | } |
1da177e4 | 758 | |
f7b004a1 BM |
759 | acpi_status |
760 | acpi_os_physical_table_override(struct acpi_table_header *existing_table, | |
a543132e | 761 | acpi_physical_address *address, u32 *length) |
f7b004a1 | 762 | { |
b2a35003 | 763 | int table_offset = 0; |
c85cc817 | 764 | int table_index = 0; |
b2a35003 | 765 | struct acpi_table_header *table; |
a543132e | 766 | u32 table_length; |
b2a35003 | 767 | |
a543132e | 768 | *length = 0; |
b2a35003 | 769 | *address = 0; |
b2a35003 TR |
770 | if (!acpi_tables_addr) |
771 | return AE_OK; | |
772 | ||
a543132e | 773 | while (table_offset + ACPI_HEADER_SIZE <= all_tables_size) { |
b2a35003 TR |
774 | table = acpi_os_map_memory(acpi_tables_addr + table_offset, |
775 | ACPI_HEADER_SIZE); | |
b2a35003 TR |
776 | if (table_offset + table->length > all_tables_size) { |
777 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
778 | WARN_ON(1); | |
779 | return AE_OK; | |
780 | } | |
781 | ||
a543132e | 782 | table_length = table->length; |
b2a35003 | 783 | |
a543132e | 784 | /* Only override tables matched */ |
c85cc817 LZ |
785 | if (test_bit(table_index, acpi_initrd_installed) || |
786 | memcmp(existing_table->signature, table->signature, 4) || | |
a543132e | 787 | memcmp(table->oem_table_id, existing_table->oem_table_id, |
b2a35003 | 788 | ACPI_OEM_TABLE_ID_SIZE)) { |
a543132e LZ |
789 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); |
790 | goto next_table; | |
b2a35003 TR |
791 | } |
792 | ||
a543132e | 793 | *length = table_length; |
b2a35003 | 794 | *address = acpi_tables_addr + table_offset; |
a543132e LZ |
795 | acpi_table_taint(existing_table); |
796 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
c85cc817 | 797 | set_bit(table_index, acpi_initrd_installed); |
b2a35003 | 798 | break; |
f7b004a1 | 799 | |
a543132e LZ |
800 | next_table: |
801 | table_offset += table_length; | |
c85cc817 | 802 | table_index++; |
a543132e | 803 | } |
b2a35003 | 804 | return AE_OK; |
a543132e | 805 | } |
c85cc817 LZ |
806 | |
807 | void __init acpi_initrd_initialize_tables(void) | |
808 | { | |
809 | int table_offset = 0; | |
810 | int table_index = 0; | |
811 | u32 table_length; | |
812 | struct acpi_table_header *table; | |
813 | ||
814 | if (!acpi_tables_addr) | |
815 | return; | |
816 | ||
817 | while (table_offset + ACPI_HEADER_SIZE <= all_tables_size) { | |
818 | table = acpi_os_map_memory(acpi_tables_addr + table_offset, | |
819 | ACPI_HEADER_SIZE); | |
820 | if (table_offset + table->length > all_tables_size) { | |
821 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
822 | WARN_ON(1); | |
823 | return; | |
824 | } | |
825 | ||
826 | table_length = table->length; | |
827 | ||
828 | /* Skip RSDT/XSDT which should only be used for override */ | |
829 | if (test_bit(table_index, acpi_initrd_installed) || | |
830 | ACPI_COMPARE_NAME(table->signature, ACPI_SIG_RSDT) || | |
831 | ACPI_COMPARE_NAME(table->signature, ACPI_SIG_XSDT)) { | |
832 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
833 | goto next_table; | |
834 | } | |
835 | ||
836 | acpi_table_taint(table); | |
837 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
838 | acpi_install_table(acpi_tables_addr + table_offset, TRUE); | |
839 | set_bit(table_index, acpi_initrd_installed); | |
840 | next_table: | |
841 | table_offset += table_length; | |
842 | table_index++; | |
843 | } | |
844 | } | |
a543132e LZ |
845 | #else |
846 | acpi_status | |
847 | acpi_os_physical_table_override(struct acpi_table_header *existing_table, | |
848 | acpi_physical_address *address, | |
849 | u32 *table_length) | |
850 | { | |
851 | *table_length = 0; | |
852 | *address = 0; | |
853 | return AE_OK; | |
854 | } | |
c85cc817 LZ |
855 | |
856 | void __init acpi_initrd_initialize_tables(void) | |
857 | { | |
858 | } | |
a543132e LZ |
859 | #endif /* CONFIG_ACPI_INITRD_TABLE_OVERRIDE */ |
860 | ||
861 | acpi_status | |
862 | acpi_os_table_override(struct acpi_table_header *existing_table, | |
863 | struct acpi_table_header **new_table) | |
864 | { | |
865 | if (!existing_table || !new_table) | |
866 | return AE_BAD_PARAMETER; | |
867 | ||
868 | *new_table = NULL; | |
869 | ||
870 | #ifdef CONFIG_ACPI_CUSTOM_DSDT | |
871 | if (strncmp(existing_table->signature, "DSDT", 4) == 0) | |
872 | *new_table = (struct acpi_table_header *)AmlCode; | |
b2a35003 | 873 | #endif |
a543132e LZ |
874 | if (*new_table != NULL) |
875 | acpi_table_taint(existing_table); | |
876 | return AE_OK; | |
b2a35003 | 877 | } |
f7b004a1 | 878 | |
7d12e780 | 879 | static irqreturn_t acpi_irq(int irq, void *dev_id) |
1da177e4 | 880 | { |
5229e87d LB |
881 | u32 handled; |
882 | ||
883 | handled = (*acpi_irq_handler) (acpi_irq_context); | |
884 | ||
885 | if (handled) { | |
886 | acpi_irq_handled++; | |
887 | return IRQ_HANDLED; | |
88bea188 LB |
888 | } else { |
889 | acpi_irq_not_handled++; | |
5229e87d | 890 | return IRQ_NONE; |
88bea188 | 891 | } |
1da177e4 LT |
892 | } |
893 | ||
894 | acpi_status | |
4be44fcd LB |
895 | acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler, |
896 | void *context) | |
1da177e4 LT |
897 | { |
898 | unsigned int irq; | |
899 | ||
5229e87d LB |
900 | acpi_irq_stats_init(); |
901 | ||
1da177e4 | 902 | /* |
23fe3630 RW |
903 | * ACPI interrupts different from the SCI in our copy of the FADT are |
904 | * not supported. | |
1da177e4 | 905 | */ |
23fe3630 RW |
906 | if (gsi != acpi_gbl_FADT.sci_interrupt) |
907 | return AE_BAD_PARAMETER; | |
908 | ||
909 | if (acpi_irq_handler) | |
910 | return AE_ALREADY_ACQUIRED; | |
911 | ||
1da177e4 LT |
912 | if (acpi_gsi_to_irq(gsi, &irq) < 0) { |
913 | printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n", | |
914 | gsi); | |
915 | return AE_OK; | |
916 | } | |
917 | ||
918 | acpi_irq_handler = handler; | |
919 | acpi_irq_context = context; | |
a8d46b9e | 920 | if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) { |
1da177e4 | 921 | printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq); |
23fe3630 | 922 | acpi_irq_handler = NULL; |
1da177e4 LT |
923 | return AE_NOT_ACQUIRED; |
924 | } | |
49e4b843 | 925 | acpi_sci_irq = irq; |
1da177e4 LT |
926 | |
927 | return AE_OK; | |
928 | } | |
929 | ||
49e4b843 | 930 | acpi_status acpi_os_remove_interrupt_handler(u32 gsi, acpi_osd_handler handler) |
1da177e4 | 931 | { |
49e4b843 | 932 | if (gsi != acpi_gbl_FADT.sci_interrupt || !acpi_sci_irq_valid()) |
23fe3630 RW |
933 | return AE_BAD_PARAMETER; |
934 | ||
49e4b843 | 935 | free_irq(acpi_sci_irq, acpi_irq); |
23fe3630 | 936 | acpi_irq_handler = NULL; |
49e4b843 | 937 | acpi_sci_irq = INVALID_ACPI_IRQ; |
1da177e4 LT |
938 | |
939 | return AE_OK; | |
940 | } | |
941 | ||
942 | /* | |
943 | * Running in interpreter thread context, safe to sleep | |
944 | */ | |
945 | ||
439913ff | 946 | void acpi_os_sleep(u64 ms) |
1da177e4 | 947 | { |
30282299 | 948 | msleep(ms); |
1da177e4 | 949 | } |
4be44fcd | 950 | |
4be44fcd | 951 | void acpi_os_stall(u32 us) |
1da177e4 LT |
952 | { |
953 | while (us) { | |
954 | u32 delay = 1000; | |
955 | ||
956 | if (delay > us) | |
957 | delay = us; | |
958 | udelay(delay); | |
959 | touch_nmi_watchdog(); | |
960 | us -= delay; | |
961 | } | |
962 | } | |
4be44fcd | 963 | |
1da177e4 LT |
964 | /* |
965 | * Support ACPI 3.0 AML Timer operand | |
966 | * Returns 64-bit free-running, monotonically increasing timer | |
967 | * with 100ns granularity | |
968 | */ | |
4be44fcd | 969 | u64 acpi_os_get_timer(void) |
1da177e4 | 970 | { |
10619066 MW |
971 | u64 time_ns = ktime_to_ns(ktime_get()); |
972 | do_div(time_ns, 100); | |
973 | return time_ns; | |
1da177e4 LT |
974 | } |
975 | ||
4be44fcd | 976 | acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width) |
1da177e4 LT |
977 | { |
978 | u32 dummy; | |
979 | ||
980 | if (!value) | |
981 | value = &dummy; | |
982 | ||
49fbabf5 ZY |
983 | *value = 0; |
984 | if (width <= 8) { | |
4be44fcd | 985 | *(u8 *) value = inb(port); |
49fbabf5 | 986 | } else if (width <= 16) { |
4be44fcd | 987 | *(u16 *) value = inw(port); |
49fbabf5 | 988 | } else if (width <= 32) { |
4be44fcd | 989 | *(u32 *) value = inl(port); |
49fbabf5 | 990 | } else { |
1da177e4 LT |
991 | BUG(); |
992 | } | |
993 | ||
994 | return AE_OK; | |
995 | } | |
4be44fcd | 996 | |
1da177e4 LT |
997 | EXPORT_SYMBOL(acpi_os_read_port); |
998 | ||
4be44fcd | 999 | acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width) |
1da177e4 | 1000 | { |
49fbabf5 | 1001 | if (width <= 8) { |
1da177e4 | 1002 | outb(value, port); |
49fbabf5 | 1003 | } else if (width <= 16) { |
1da177e4 | 1004 | outw(value, port); |
49fbabf5 | 1005 | } else if (width <= 32) { |
1da177e4 | 1006 | outl(value, port); |
49fbabf5 | 1007 | } else { |
1da177e4 LT |
1008 | BUG(); |
1009 | } | |
1010 | ||
1011 | return AE_OK; | |
1012 | } | |
4be44fcd | 1013 | |
1da177e4 LT |
1014 | EXPORT_SYMBOL(acpi_os_write_port); |
1015 | ||
e615bf5b | 1016 | acpi_status |
653f4b53 | 1017 | acpi_os_read_memory(acpi_physical_address phys_addr, u64 *value, u32 width) |
e615bf5b MS |
1018 | { |
1019 | void __iomem *virt_addr; | |
1020 | unsigned int size = width / 8; | |
1021 | bool unmap = false; | |
1022 | u64 dummy; | |
1023 | ||
1024 | rcu_read_lock(); | |
1025 | virt_addr = acpi_map_vaddr_lookup(phys_addr, size); | |
1026 | if (!virt_addr) { | |
1027 | rcu_read_unlock(); | |
1028 | virt_addr = acpi_os_ioremap(phys_addr, size); | |
1029 | if (!virt_addr) | |
1030 | return AE_BAD_ADDRESS; | |
1031 | unmap = true; | |
1032 | } | |
1033 | ||
1034 | if (!value) | |
1035 | value = &dummy; | |
1036 | ||
1037 | switch (width) { | |
1038 | case 8: | |
1039 | *(u8 *) value = readb(virt_addr); | |
1040 | break; | |
1041 | case 16: | |
1042 | *(u16 *) value = readw(virt_addr); | |
1043 | break; | |
1044 | case 32: | |
1045 | *(u32 *) value = readl(virt_addr); | |
1046 | break; | |
1047 | case 64: | |
3277b4ea | 1048 | *(u64 *) value = readq(virt_addr); |
e615bf5b MS |
1049 | break; |
1050 | default: | |
1051 | BUG(); | |
1052 | } | |
1053 | ||
1054 | if (unmap) | |
1055 | iounmap(virt_addr); | |
1056 | else | |
1057 | rcu_read_unlock(); | |
1058 | ||
1059 | return AE_OK; | |
1060 | } | |
1061 | ||
e615bf5b | 1062 | acpi_status |
653f4b53 | 1063 | acpi_os_write_memory(acpi_physical_address phys_addr, u64 value, u32 width) |
e615bf5b MS |
1064 | { |
1065 | void __iomem *virt_addr; | |
1066 | unsigned int size = width / 8; | |
1067 | bool unmap = false; | |
1068 | ||
1069 | rcu_read_lock(); | |
1070 | virt_addr = acpi_map_vaddr_lookup(phys_addr, size); | |
1071 | if (!virt_addr) { | |
1072 | rcu_read_unlock(); | |
1073 | virt_addr = acpi_os_ioremap(phys_addr, size); | |
1074 | if (!virt_addr) | |
1075 | return AE_BAD_ADDRESS; | |
1076 | unmap = true; | |
1077 | } | |
1078 | ||
1079 | switch (width) { | |
1080 | case 8: | |
1081 | writeb(value, virt_addr); | |
1082 | break; | |
1083 | case 16: | |
1084 | writew(value, virt_addr); | |
1085 | break; | |
1086 | case 32: | |
1087 | writel(value, virt_addr); | |
1088 | break; | |
1089 | case 64: | |
3277b4ea | 1090 | writeq(value, virt_addr); |
e615bf5b MS |
1091 | break; |
1092 | default: | |
1093 | BUG(); | |
1094 | } | |
1095 | ||
1096 | if (unmap) | |
1097 | iounmap(virt_addr); | |
1098 | else | |
1099 | rcu_read_unlock(); | |
1100 | ||
1101 | return AE_OK; | |
1102 | } | |
1103 | ||
1da177e4 | 1104 | acpi_status |
4be44fcd | 1105 | acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
c5f0231e | 1106 | u64 *value, u32 width) |
1da177e4 LT |
1107 | { |
1108 | int result, size; | |
c5f0231e | 1109 | u32 value32; |
1da177e4 LT |
1110 | |
1111 | if (!value) | |
1112 | return AE_BAD_PARAMETER; | |
1113 | ||
1114 | switch (width) { | |
1115 | case 8: | |
1116 | size = 1; | |
1117 | break; | |
1118 | case 16: | |
1119 | size = 2; | |
1120 | break; | |
1121 | case 32: | |
1122 | size = 4; | |
1123 | break; | |
1124 | default: | |
1125 | return AE_ERROR; | |
1126 | } | |
1127 | ||
b6ce068a MW |
1128 | result = raw_pci_read(pci_id->segment, pci_id->bus, |
1129 | PCI_DEVFN(pci_id->device, pci_id->function), | |
c5f0231e BM |
1130 | reg, size, &value32); |
1131 | *value = value32; | |
1da177e4 LT |
1132 | |
1133 | return (result ? AE_ERROR : AE_OK); | |
1134 | } | |
4be44fcd | 1135 | |
1da177e4 | 1136 | acpi_status |
4be44fcd | 1137 | acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
439913ff | 1138 | u64 value, u32 width) |
1da177e4 LT |
1139 | { |
1140 | int result, size; | |
1141 | ||
1142 | switch (width) { | |
1143 | case 8: | |
1144 | size = 1; | |
1145 | break; | |
1146 | case 16: | |
1147 | size = 2; | |
1148 | break; | |
1149 | case 32: | |
1150 | size = 4; | |
1151 | break; | |
1152 | default: | |
1153 | return AE_ERROR; | |
1154 | } | |
1155 | ||
b6ce068a MW |
1156 | result = raw_pci_write(pci_id->segment, pci_id->bus, |
1157 | PCI_DEVFN(pci_id->device, pci_id->function), | |
1158 | reg, size, value); | |
1da177e4 LT |
1159 | |
1160 | return (result ? AE_ERROR : AE_OK); | |
1161 | } | |
1162 | ||
65f27f38 | 1163 | static void acpi_os_execute_deferred(struct work_struct *work) |
88db5e14 AS |
1164 | { |
1165 | struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work); | |
88db5e14 | 1166 | |
19cd847a ZR |
1167 | dpc->function(dpc->context); |
1168 | kfree(dpc); | |
19cd847a ZR |
1169 | } |
1170 | ||
836d0830 LZ |
1171 | #ifdef CONFIG_ACPI_DEBUGGER |
1172 | static struct acpi_debugger acpi_debugger; | |
1173 | static bool acpi_debugger_initialized; | |
1174 | ||
1175 | int acpi_register_debugger(struct module *owner, | |
1176 | const struct acpi_debugger_ops *ops) | |
1177 | { | |
1178 | int ret = 0; | |
1179 | ||
1180 | mutex_lock(&acpi_debugger.lock); | |
1181 | if (acpi_debugger.ops) { | |
1182 | ret = -EBUSY; | |
1183 | goto err_lock; | |
1184 | } | |
1185 | ||
1186 | acpi_debugger.owner = owner; | |
1187 | acpi_debugger.ops = ops; | |
1188 | ||
1189 | err_lock: | |
1190 | mutex_unlock(&acpi_debugger.lock); | |
1191 | return ret; | |
1192 | } | |
1193 | EXPORT_SYMBOL(acpi_register_debugger); | |
1194 | ||
1195 | void acpi_unregister_debugger(const struct acpi_debugger_ops *ops) | |
1196 | { | |
1197 | mutex_lock(&acpi_debugger.lock); | |
1198 | if (ops == acpi_debugger.ops) { | |
1199 | acpi_debugger.ops = NULL; | |
1200 | acpi_debugger.owner = NULL; | |
1201 | } | |
1202 | mutex_unlock(&acpi_debugger.lock); | |
1203 | } | |
1204 | EXPORT_SYMBOL(acpi_unregister_debugger); | |
1205 | ||
1206 | int acpi_debugger_create_thread(acpi_osd_exec_callback function, void *context) | |
1207 | { | |
1208 | int ret; | |
1209 | int (*func)(acpi_osd_exec_callback, void *); | |
1210 | struct module *owner; | |
1211 | ||
1212 | if (!acpi_debugger_initialized) | |
1213 | return -ENODEV; | |
1214 | mutex_lock(&acpi_debugger.lock); | |
1215 | if (!acpi_debugger.ops) { | |
1216 | ret = -ENODEV; | |
1217 | goto err_lock; | |
1218 | } | |
1219 | if (!try_module_get(acpi_debugger.owner)) { | |
1220 | ret = -ENODEV; | |
1221 | goto err_lock; | |
1222 | } | |
1223 | func = acpi_debugger.ops->create_thread; | |
1224 | owner = acpi_debugger.owner; | |
1225 | mutex_unlock(&acpi_debugger.lock); | |
1226 | ||
1227 | ret = func(function, context); | |
1228 | ||
1229 | mutex_lock(&acpi_debugger.lock); | |
1230 | module_put(owner); | |
1231 | err_lock: | |
1232 | mutex_unlock(&acpi_debugger.lock); | |
1233 | return ret; | |
1234 | } | |
1235 | ||
1236 | ssize_t acpi_debugger_write_log(const char *msg) | |
1237 | { | |
1238 | ssize_t ret; | |
1239 | ssize_t (*func)(const char *); | |
1240 | struct module *owner; | |
1241 | ||
1242 | if (!acpi_debugger_initialized) | |
1243 | return -ENODEV; | |
1244 | mutex_lock(&acpi_debugger.lock); | |
1245 | if (!acpi_debugger.ops) { | |
1246 | ret = -ENODEV; | |
1247 | goto err_lock; | |
1248 | } | |
1249 | if (!try_module_get(acpi_debugger.owner)) { | |
1250 | ret = -ENODEV; | |
1251 | goto err_lock; | |
1252 | } | |
1253 | func = acpi_debugger.ops->write_log; | |
1254 | owner = acpi_debugger.owner; | |
1255 | mutex_unlock(&acpi_debugger.lock); | |
1256 | ||
1257 | ret = func(msg); | |
1258 | ||
1259 | mutex_lock(&acpi_debugger.lock); | |
1260 | module_put(owner); | |
1261 | err_lock: | |
1262 | mutex_unlock(&acpi_debugger.lock); | |
1263 | return ret; | |
1264 | } | |
1265 | ||
1266 | ssize_t acpi_debugger_read_cmd(char *buffer, size_t buffer_length) | |
1267 | { | |
1268 | ssize_t ret; | |
1269 | ssize_t (*func)(char *, size_t); | |
1270 | struct module *owner; | |
1271 | ||
1272 | if (!acpi_debugger_initialized) | |
1273 | return -ENODEV; | |
1274 | mutex_lock(&acpi_debugger.lock); | |
1275 | if (!acpi_debugger.ops) { | |
1276 | ret = -ENODEV; | |
1277 | goto err_lock; | |
1278 | } | |
1279 | if (!try_module_get(acpi_debugger.owner)) { | |
1280 | ret = -ENODEV; | |
1281 | goto err_lock; | |
1282 | } | |
1283 | func = acpi_debugger.ops->read_cmd; | |
1284 | owner = acpi_debugger.owner; | |
1285 | mutex_unlock(&acpi_debugger.lock); | |
1286 | ||
1287 | ret = func(buffer, buffer_length); | |
1288 | ||
1289 | mutex_lock(&acpi_debugger.lock); | |
1290 | module_put(owner); | |
1291 | err_lock: | |
1292 | mutex_unlock(&acpi_debugger.lock); | |
1293 | return ret; | |
1294 | } | |
1295 | ||
1296 | int acpi_debugger_wait_command_ready(void) | |
1297 | { | |
1298 | int ret; | |
1299 | int (*func)(bool, char *, size_t); | |
1300 | struct module *owner; | |
1301 | ||
1302 | if (!acpi_debugger_initialized) | |
1303 | return -ENODEV; | |
1304 | mutex_lock(&acpi_debugger.lock); | |
1305 | if (!acpi_debugger.ops) { | |
1306 | ret = -ENODEV; | |
1307 | goto err_lock; | |
1308 | } | |
1309 | if (!try_module_get(acpi_debugger.owner)) { | |
1310 | ret = -ENODEV; | |
1311 | goto err_lock; | |
1312 | } | |
1313 | func = acpi_debugger.ops->wait_command_ready; | |
1314 | owner = acpi_debugger.owner; | |
1315 | mutex_unlock(&acpi_debugger.lock); | |
1316 | ||
1317 | ret = func(acpi_gbl_method_executing, | |
1318 | acpi_gbl_db_line_buf, ACPI_DB_LINE_BUFFER_SIZE); | |
1319 | ||
1320 | mutex_lock(&acpi_debugger.lock); | |
1321 | module_put(owner); | |
1322 | err_lock: | |
1323 | mutex_unlock(&acpi_debugger.lock); | |
1324 | return ret; | |
1325 | } | |
1326 | ||
1327 | int acpi_debugger_notify_command_complete(void) | |
1328 | { | |
1329 | int ret; | |
1330 | int (*func)(void); | |
1331 | struct module *owner; | |
1332 | ||
1333 | if (!acpi_debugger_initialized) | |
1334 | return -ENODEV; | |
1335 | mutex_lock(&acpi_debugger.lock); | |
1336 | if (!acpi_debugger.ops) { | |
1337 | ret = -ENODEV; | |
1338 | goto err_lock; | |
1339 | } | |
1340 | if (!try_module_get(acpi_debugger.owner)) { | |
1341 | ret = -ENODEV; | |
1342 | goto err_lock; | |
1343 | } | |
1344 | func = acpi_debugger.ops->notify_command_complete; | |
1345 | owner = acpi_debugger.owner; | |
1346 | mutex_unlock(&acpi_debugger.lock); | |
1347 | ||
1348 | ret = func(); | |
1349 | ||
1350 | mutex_lock(&acpi_debugger.lock); | |
1351 | module_put(owner); | |
1352 | err_lock: | |
1353 | mutex_unlock(&acpi_debugger.lock); | |
1354 | return ret; | |
1355 | } | |
1356 | ||
1357 | int __init acpi_debugger_init(void) | |
1358 | { | |
1359 | mutex_init(&acpi_debugger.lock); | |
1360 | acpi_debugger_initialized = true; | |
1361 | return 0; | |
1362 | } | |
1363 | #endif | |
1364 | ||
b8d35192 AS |
1365 | /******************************************************************************* |
1366 | * | |
1367 | * FUNCTION: acpi_os_execute | |
1368 | * | |
1369 | * PARAMETERS: Type - Type of the callback | |
1370 | * Function - Function to be executed | |
1371 | * Context - Function parameters | |
1372 | * | |
1373 | * RETURN: Status | |
1374 | * | |
1375 | * DESCRIPTION: Depending on type, either queues function for deferred execution or | |
1376 | * immediately executes function on a separate thread. | |
1377 | * | |
1378 | ******************************************************************************/ | |
1379 | ||
7b98118a RW |
1380 | acpi_status acpi_os_execute(acpi_execute_type type, |
1381 | acpi_osd_exec_callback function, void *context) | |
1da177e4 | 1382 | { |
4be44fcd LB |
1383 | acpi_status status = AE_OK; |
1384 | struct acpi_os_dpc *dpc; | |
17bc54ee | 1385 | struct workqueue_struct *queue; |
19cd847a | 1386 | int ret; |
72945b2b LB |
1387 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
1388 | "Scheduling function [%p(%p)] for deferred execution.\n", | |
1389 | function, context)); | |
1da177e4 | 1390 | |
8cfb0cdf | 1391 | if (type == OSL_DEBUGGER_MAIN_THREAD) { |
836d0830 | 1392 | ret = acpi_debugger_create_thread(function, context); |
8cfb0cdf LZ |
1393 | if (ret) { |
1394 | pr_err("Call to kthread_create() failed.\n"); | |
1395 | status = AE_ERROR; | |
1396 | } | |
1397 | goto out_thread; | |
1398 | } | |
1399 | ||
1da177e4 LT |
1400 | /* |
1401 | * Allocate/initialize DPC structure. Note that this memory will be | |
65f27f38 | 1402 | * freed by the callee. The kernel handles the work_struct list in a |
1da177e4 LT |
1403 | * way that allows us to also free its memory inside the callee. |
1404 | * Because we may want to schedule several tasks with different | |
1405 | * parameters we can't use the approach some kernel code uses of | |
65f27f38 | 1406 | * having a static work_struct. |
1da177e4 | 1407 | */ |
72945b2b | 1408 | |
3ae45a27 | 1409 | dpc = kzalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC); |
1da177e4 | 1410 | if (!dpc) |
889c78be | 1411 | return AE_NO_MEMORY; |
b976fe19 | 1412 | |
1da177e4 LT |
1413 | dpc->function = function; |
1414 | dpc->context = context; | |
b976fe19 | 1415 | |
c02256be | 1416 | /* |
3ae45a27 RW |
1417 | * To prevent lockdep from complaining unnecessarily, make sure that |
1418 | * there is a different static lockdep key for each workqueue by using | |
1419 | * INIT_WORK() for each of them separately. | |
c02256be | 1420 | */ |
7b98118a | 1421 | if (type == OSL_NOTIFY_HANDLER) { |
3ae45a27 | 1422 | queue = kacpi_notify_wq; |
bc73675b | 1423 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); |
8cfb0cdf | 1424 | } else if (type == OSL_GPE_HANDLER) { |
3ae45a27 | 1425 | queue = kacpid_wq; |
bc73675b | 1426 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); |
8cfb0cdf LZ |
1427 | } else { |
1428 | pr_err("Unsupported os_execute type %d.\n", type); | |
1429 | status = AE_ERROR; | |
3ae45a27 | 1430 | } |
bc73675b | 1431 | |
8cfb0cdf LZ |
1432 | if (ACPI_FAILURE(status)) |
1433 | goto err_workqueue; | |
1434 | ||
8fec62b2 TH |
1435 | /* |
1436 | * On some machines, a software-initiated SMI causes corruption unless | |
1437 | * the SMI runs on CPU 0. An SMI can be initiated by any AML, but | |
1438 | * typically it's done in GPE-related methods that are run via | |
1439 | * workqueues, so we can avoid the known corruption cases by always | |
1440 | * queueing on CPU 0. | |
1441 | */ | |
1442 | ret = queue_work_on(0, queue, &dpc->work); | |
19cd847a | 1443 | if (!ret) { |
55ac9a01 LM |
1444 | printk(KERN_ERR PREFIX |
1445 | "Call to queue_work() failed.\n"); | |
17bc54ee | 1446 | status = AE_ERROR; |
1da177e4 | 1447 | } |
8cfb0cdf LZ |
1448 | err_workqueue: |
1449 | if (ACPI_FAILURE(status)) | |
1450 | kfree(dpc); | |
1451 | out_thread: | |
889c78be | 1452 | return status; |
1da177e4 | 1453 | } |
7b98118a | 1454 | EXPORT_SYMBOL(acpi_os_execute); |
4be44fcd | 1455 | |
7b98118a | 1456 | void acpi_os_wait_events_complete(void) |
19cd847a | 1457 | { |
90253a79 LZ |
1458 | /* |
1459 | * Make sure the GPE handler or the fixed event handler is not used | |
1460 | * on another CPU after removal. | |
1461 | */ | |
efb1cf7d CY |
1462 | if (acpi_sci_irq_valid()) |
1463 | synchronize_hardirq(acpi_sci_irq); | |
7b98118a RW |
1464 | flush_workqueue(kacpid_wq); |
1465 | flush_workqueue(kacpi_notify_wq); | |
19cd847a | 1466 | } |
1da177e4 | 1467 | |
7b98118a RW |
1468 | struct acpi_hp_work { |
1469 | struct work_struct work; | |
1e3bcb59 | 1470 | struct acpi_device *adev; |
7b98118a RW |
1471 | u32 src; |
1472 | }; | |
1473 | ||
1474 | static void acpi_hotplug_work_fn(struct work_struct *work) | |
19cd847a | 1475 | { |
7b98118a RW |
1476 | struct acpi_hp_work *hpw = container_of(work, struct acpi_hp_work, work); |
1477 | ||
1478 | acpi_os_wait_events_complete(); | |
1e3bcb59 | 1479 | acpi_device_hotplug(hpw->adev, hpw->src); |
7b98118a | 1480 | kfree(hpw); |
19cd847a ZR |
1481 | } |
1482 | ||
1e3bcb59 | 1483 | acpi_status acpi_hotplug_schedule(struct acpi_device *adev, u32 src) |
1da177e4 | 1484 | { |
7b98118a RW |
1485 | struct acpi_hp_work *hpw; |
1486 | ||
1487 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, | |
1e3bcb59 RW |
1488 | "Scheduling hotplug event (%p, %u) for deferred execution.\n", |
1489 | adev, src)); | |
7b98118a RW |
1490 | |
1491 | hpw = kmalloc(sizeof(*hpw), GFP_KERNEL); | |
1492 | if (!hpw) | |
1493 | return AE_NO_MEMORY; | |
1494 | ||
1495 | INIT_WORK(&hpw->work, acpi_hotplug_work_fn); | |
1e3bcb59 | 1496 | hpw->adev = adev; |
7b98118a RW |
1497 | hpw->src = src; |
1498 | /* | |
1499 | * We can't run hotplug code in kacpid_wq/kacpid_notify_wq etc., because | |
1500 | * the hotplug code may call driver .remove() functions, which may | |
1501 | * invoke flush_scheduled_work()/acpi_os_wait_events_complete() to flush | |
1502 | * these workqueues. | |
1503 | */ | |
1504 | if (!queue_work(kacpi_hotplug_wq, &hpw->work)) { | |
1505 | kfree(hpw); | |
1506 | return AE_ERROR; | |
1507 | } | |
1508 | return AE_OK; | |
1da177e4 | 1509 | } |
4be44fcd | 1510 | |
d783156e RW |
1511 | bool acpi_queue_hotplug_work(struct work_struct *work) |
1512 | { | |
1513 | return queue_work(kacpi_hotplug_wq, work); | |
1514 | } | |
1da177e4 | 1515 | |
1da177e4 | 1516 | acpi_status |
4be44fcd | 1517 | acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle) |
1da177e4 | 1518 | { |
4be44fcd | 1519 | struct semaphore *sem = NULL; |
1da177e4 | 1520 | |
2d0acb4a | 1521 | sem = acpi_os_allocate_zeroed(sizeof(struct semaphore)); |
1da177e4 | 1522 | if (!sem) |
d550d98d | 1523 | return AE_NO_MEMORY; |
1da177e4 LT |
1524 | |
1525 | sema_init(sem, initial_units); | |
1526 | ||
4be44fcd | 1527 | *handle = (acpi_handle *) sem; |
1da177e4 | 1528 | |
4be44fcd LB |
1529 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n", |
1530 | *handle, initial_units)); | |
1da177e4 | 1531 | |
d550d98d | 1532 | return AE_OK; |
1da177e4 | 1533 | } |
1da177e4 | 1534 | |
1da177e4 LT |
1535 | /* |
1536 | * TODO: A better way to delete semaphores? Linux doesn't have a | |
1537 | * 'delete_semaphore()' function -- may result in an invalid | |
1538 | * pointer dereference for non-synchronized consumers. Should | |
1539 | * we at least check for blocked threads and signal/cancel them? | |
1540 | */ | |
1541 | ||
4be44fcd | 1542 | acpi_status acpi_os_delete_semaphore(acpi_handle handle) |
1da177e4 | 1543 | { |
4be44fcd | 1544 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 1545 | |
1da177e4 | 1546 | if (!sem) |
d550d98d | 1547 | return AE_BAD_PARAMETER; |
1da177e4 | 1548 | |
4be44fcd | 1549 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle)); |
1da177e4 | 1550 | |
f1241c87 | 1551 | BUG_ON(!list_empty(&sem->wait_list)); |
02438d87 | 1552 | kfree(sem); |
4be44fcd | 1553 | sem = NULL; |
1da177e4 | 1554 | |
d550d98d | 1555 | return AE_OK; |
1da177e4 | 1556 | } |
1da177e4 | 1557 | |
1da177e4 | 1558 | /* |
1da177e4 LT |
1559 | * TODO: Support for units > 1? |
1560 | */ | |
4be44fcd | 1561 | acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout) |
1da177e4 | 1562 | { |
4be44fcd LB |
1563 | acpi_status status = AE_OK; |
1564 | struct semaphore *sem = (struct semaphore *)handle; | |
f1241c87 | 1565 | long jiffies; |
4be44fcd | 1566 | int ret = 0; |
1da177e4 | 1567 | |
7901a052 LZ |
1568 | if (!acpi_os_initialized) |
1569 | return AE_OK; | |
1570 | ||
1da177e4 | 1571 | if (!sem || (units < 1)) |
d550d98d | 1572 | return AE_BAD_PARAMETER; |
1da177e4 LT |
1573 | |
1574 | if (units > 1) | |
d550d98d | 1575 | return AE_SUPPORT; |
1da177e4 | 1576 | |
4be44fcd LB |
1577 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n", |
1578 | handle, units, timeout)); | |
1da177e4 | 1579 | |
f1241c87 MW |
1580 | if (timeout == ACPI_WAIT_FOREVER) |
1581 | jiffies = MAX_SCHEDULE_TIMEOUT; | |
1582 | else | |
1583 | jiffies = msecs_to_jiffies(timeout); | |
cad1525a | 1584 | |
f1241c87 MW |
1585 | ret = down_timeout(sem, jiffies); |
1586 | if (ret) | |
1587 | status = AE_TIME; | |
1da177e4 LT |
1588 | |
1589 | if (ACPI_FAILURE(status)) { | |
9e7e2c04 | 1590 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, |
a6fc6720 | 1591 | "Failed to acquire semaphore[%p|%d|%d], %s", |
4be44fcd LB |
1592 | handle, units, timeout, |
1593 | acpi_format_exception(status))); | |
1594 | } else { | |
1595 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, | |
a6fc6720 | 1596 | "Acquired semaphore[%p|%d|%d]", handle, |
4be44fcd | 1597 | units, timeout)); |
1da177e4 LT |
1598 | } |
1599 | ||
d550d98d | 1600 | return status; |
1da177e4 | 1601 | } |
1da177e4 | 1602 | |
1da177e4 LT |
1603 | /* |
1604 | * TODO: Support for units > 1? | |
1605 | */ | |
4be44fcd | 1606 | acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units) |
1da177e4 | 1607 | { |
4be44fcd | 1608 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 1609 | |
7901a052 LZ |
1610 | if (!acpi_os_initialized) |
1611 | return AE_OK; | |
1612 | ||
1da177e4 | 1613 | if (!sem || (units < 1)) |
d550d98d | 1614 | return AE_BAD_PARAMETER; |
1da177e4 LT |
1615 | |
1616 | if (units > 1) | |
d550d98d | 1617 | return AE_SUPPORT; |
1da177e4 | 1618 | |
4be44fcd LB |
1619 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle, |
1620 | units)); | |
1da177e4 LT |
1621 | |
1622 | up(sem); | |
1623 | ||
d550d98d | 1624 | return AE_OK; |
1da177e4 | 1625 | } |
4be44fcd | 1626 | |
4d946f79 | 1627 | acpi_status acpi_os_get_line(char *buffer, u32 buffer_length, u32 *bytes_read) |
1da177e4 | 1628 | { |
1da177e4 LT |
1629 | #ifdef ENABLE_DEBUGGER |
1630 | if (acpi_in_debugger) { | |
1631 | u32 chars; | |
1632 | ||
4d946f79 | 1633 | kdb_read(buffer, buffer_length); |
1da177e4 LT |
1634 | |
1635 | /* remove the CR kdb includes */ | |
1636 | chars = strlen(buffer) - 1; | |
1637 | buffer[chars] = '\0'; | |
1638 | } | |
8cfb0cdf LZ |
1639 | #else |
1640 | int ret; | |
1641 | ||
836d0830 | 1642 | ret = acpi_debugger_read_cmd(buffer, buffer_length); |
8cfb0cdf LZ |
1643 | if (ret < 0) |
1644 | return AE_ERROR; | |
1645 | if (bytes_read) | |
1646 | *bytes_read = ret; | |
1da177e4 LT |
1647 | #endif |
1648 | ||
4d946f79 | 1649 | return AE_OK; |
1da177e4 | 1650 | } |
836d0830 | 1651 | EXPORT_SYMBOL(acpi_os_get_line); |
1da177e4 | 1652 | |
8cfb0cdf LZ |
1653 | acpi_status acpi_os_wait_command_ready(void) |
1654 | { | |
1655 | int ret; | |
1656 | ||
836d0830 | 1657 | ret = acpi_debugger_wait_command_ready(); |
8cfb0cdf LZ |
1658 | if (ret < 0) |
1659 | return AE_ERROR; | |
1660 | return AE_OK; | |
1661 | } | |
1662 | ||
1663 | acpi_status acpi_os_notify_command_complete(void) | |
1664 | { | |
1665 | int ret; | |
1666 | ||
836d0830 | 1667 | ret = acpi_debugger_notify_command_complete(); |
8cfb0cdf LZ |
1668 | if (ret < 0) |
1669 | return AE_ERROR; | |
1670 | return AE_OK; | |
1671 | } | |
1672 | ||
4be44fcd | 1673 | acpi_status acpi_os_signal(u32 function, void *info) |
1da177e4 | 1674 | { |
4be44fcd | 1675 | switch (function) { |
1da177e4 LT |
1676 | case ACPI_SIGNAL_FATAL: |
1677 | printk(KERN_ERR PREFIX "Fatal opcode executed\n"); | |
1678 | break; | |
1679 | case ACPI_SIGNAL_BREAKPOINT: | |
1680 | /* | |
1681 | * AML Breakpoint | |
1682 | * ACPI spec. says to treat it as a NOP unless | |
1683 | * you are debugging. So if/when we integrate | |
1684 | * AML debugger into the kernel debugger its | |
1685 | * hook will go here. But until then it is | |
1686 | * not useful to print anything on breakpoints. | |
1687 | */ | |
1688 | break; | |
1689 | default: | |
1690 | break; | |
1691 | } | |
1692 | ||
1693 | return AE_OK; | |
1694 | } | |
4be44fcd | 1695 | |
4be44fcd | 1696 | static int __init acpi_os_name_setup(char *str) |
1da177e4 LT |
1697 | { |
1698 | char *p = acpi_os_name; | |
4be44fcd | 1699 | int count = ACPI_MAX_OVERRIDE_LEN - 1; |
1da177e4 LT |
1700 | |
1701 | if (!str || !*str) | |
1702 | return 0; | |
1703 | ||
5e2be4e0 | 1704 | for (; count-- && *str; str++) { |
1da177e4 LT |
1705 | if (isalnum(*str) || *str == ' ' || *str == ':') |
1706 | *p++ = *str; | |
1707 | else if (*str == '\'' || *str == '"') | |
1708 | continue; | |
1709 | else | |
1710 | break; | |
1711 | } | |
1712 | *p = 0; | |
1713 | ||
1714 | return 1; | |
4be44fcd | 1715 | |
1da177e4 LT |
1716 | } |
1717 | ||
1718 | __setup("acpi_os_name=", acpi_os_name_setup); | |
1719 | ||
12d32064 LM |
1720 | #define OSI_STRING_LENGTH_MAX 64 /* arbitrary */ |
1721 | #define OSI_STRING_ENTRIES_MAX 16 /* arbitrary */ | |
1722 | ||
1723 | struct osi_setup_entry { | |
1724 | char string[OSI_STRING_LENGTH_MAX]; | |
1725 | bool enable; | |
1726 | }; | |
1727 | ||
e73d3136 HG |
1728 | static struct osi_setup_entry |
1729 | osi_setup_entries[OSI_STRING_ENTRIES_MAX] __initdata = { | |
aa165971 SL |
1730 | {"Module Device", true}, |
1731 | {"Processor Device", true}, | |
1732 | {"3.0 _SCP Extensions", true}, | |
1733 | {"Processor Aggregator Device", true}, | |
1734 | }; | |
12d32064 | 1735 | |
d90aa92c LM |
1736 | void __init acpi_osi_setup(char *str) |
1737 | { | |
12d32064 LM |
1738 | struct osi_setup_entry *osi; |
1739 | bool enable = true; | |
1740 | int i; | |
1741 | ||
d90aa92c LM |
1742 | if (!acpi_gbl_create_osi_method) |
1743 | return; | |
1744 | ||
1745 | if (str == NULL || *str == '\0') { | |
1746 | printk(KERN_INFO PREFIX "_OSI method disabled\n"); | |
1747 | acpi_gbl_create_osi_method = FALSE; | |
12d32064 LM |
1748 | return; |
1749 | } | |
1750 | ||
1751 | if (*str == '!') { | |
1752 | str++; | |
5dc17986 | 1753 | if (*str == '\0') { |
30c9bb0d | 1754 | /* Do not override acpi_osi=!* */ |
dbee890b LZ |
1755 | if (!osi_config.default_disabling) |
1756 | osi_config.default_disabling = | |
30c9bb0d | 1757 | ACPI_DISABLE_ALL_VENDOR_STRINGS; |
5dc17986 | 1758 | return; |
741d8128 | 1759 | } else if (*str == '*') { |
dbee890b | 1760 | osi_config.default_disabling = ACPI_DISABLE_ALL_STRINGS; |
741d8128 LZ |
1761 | for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { |
1762 | osi = &osi_setup_entries[i]; | |
1763 | osi->enable = false; | |
1764 | } | |
1765 | return; | |
5dc17986 | 1766 | } |
12d32064 LM |
1767 | enable = false; |
1768 | } | |
1769 | ||
1770 | for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { | |
1771 | osi = &osi_setup_entries[i]; | |
1772 | if (!strcmp(osi->string, str)) { | |
1773 | osi->enable = enable; | |
1774 | break; | |
1775 | } else if (osi->string[0] == '\0') { | |
1776 | osi->enable = enable; | |
1777 | strncpy(osi->string, str, OSI_STRING_LENGTH_MAX); | |
1778 | break; | |
1779 | } | |
1780 | } | |
d90aa92c LM |
1781 | } |
1782 | ||
d4b7dc49 LB |
1783 | static void __init set_osi_linux(unsigned int enable) |
1784 | { | |
dbee890b LZ |
1785 | if (osi_config.linux_enable != enable) |
1786 | osi_config.linux_enable = enable; | |
b0ed7a91 | 1787 | |
dbee890b | 1788 | if (osi_config.linux_enable) |
b0ed7a91 LM |
1789 | acpi_osi_setup("Linux"); |
1790 | else | |
1791 | acpi_osi_setup("!Linux"); | |
1792 | ||
d4b7dc49 LB |
1793 | return; |
1794 | } | |
1795 | ||
1796 | static void __init acpi_cmdline_osi_linux(unsigned int enable) | |
1797 | { | |
dbee890b LZ |
1798 | /* cmdline set the default and override DMI */ |
1799 | osi_config.linux_cmdline = 1; | |
1800 | osi_config.linux_dmi = 0; | |
d4b7dc49 LB |
1801 | set_osi_linux(enable); |
1802 | ||
1803 | return; | |
1804 | } | |
1805 | ||
1806 | void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d) | |
1807 | { | |
d4b7dc49 LB |
1808 | printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident); |
1809 | ||
1810 | if (enable == -1) | |
1811 | return; | |
1812 | ||
dbee890b LZ |
1813 | /* DMI knows that this box asks OSI(Linux) */ |
1814 | osi_config.linux_dmi = 1; | |
d4b7dc49 | 1815 | set_osi_linux(enable); |
f507654d | 1816 | |
f507654d LB |
1817 | return; |
1818 | } | |
1819 | ||
1da177e4 | 1820 | /* |
ae00d812 LB |
1821 | * Modify the list of "OS Interfaces" reported to BIOS via _OSI |
1822 | * | |
1da177e4 | 1823 | * empty string disables _OSI |
ae00d812 LB |
1824 | * string starting with '!' disables that string |
1825 | * otherwise string is added to list, augmenting built-in strings | |
1da177e4 | 1826 | */ |
b0ed7a91 | 1827 | static void __init acpi_osi_setup_late(void) |
1da177e4 | 1828 | { |
12d32064 LM |
1829 | struct osi_setup_entry *osi; |
1830 | char *str; | |
1831 | int i; | |
d90aa92c | 1832 | acpi_status status; |
b0ed7a91 | 1833 | |
dbee890b LZ |
1834 | if (osi_config.default_disabling) { |
1835 | status = acpi_update_interfaces(osi_config.default_disabling); | |
5dc17986 LZ |
1836 | |
1837 | if (ACPI_SUCCESS(status)) | |
30c9bb0d | 1838 | printk(KERN_INFO PREFIX "Disabled all _OSI OS vendors%s\n", |
dbee890b | 1839 | osi_config.default_disabling == |
30c9bb0d LZ |
1840 | ACPI_DISABLE_ALL_STRINGS ? |
1841 | " and feature groups" : ""); | |
5dc17986 LZ |
1842 | } |
1843 | ||
12d32064 LM |
1844 | for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { |
1845 | osi = &osi_setup_entries[i]; | |
1846 | str = osi->string; | |
b0ed7a91 | 1847 | |
12d32064 LM |
1848 | if (*str == '\0') |
1849 | break; | |
1850 | if (osi->enable) { | |
1851 | status = acpi_install_interface(str); | |
d90aa92c | 1852 | |
12d32064 LM |
1853 | if (ACPI_SUCCESS(status)) |
1854 | printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str); | |
1855 | } else { | |
1856 | status = acpi_remove_interface(str); | |
d90aa92c | 1857 | |
12d32064 LM |
1858 | if (ACPI_SUCCESS(status)) |
1859 | printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str); | |
1860 | } | |
b0ed7a91 LM |
1861 | } |
1862 | } | |
1863 | ||
d90aa92c | 1864 | static int __init osi_setup(char *str) |
b0ed7a91 | 1865 | { |
d90aa92c LM |
1866 | if (str && !strcmp("Linux", str)) |
1867 | acpi_cmdline_osi_linux(1); | |
1868 | else if (str && !strcmp("!Linux", str)) | |
1869 | acpi_cmdline_osi_linux(0); | |
1870 | else | |
1871 | acpi_osi_setup(str); | |
1da177e4 LT |
1872 | |
1873 | return 1; | |
1874 | } | |
1875 | ||
d90aa92c | 1876 | __setup("acpi_osi=", osi_setup); |
1da177e4 | 1877 | |
22b5afce | 1878 | /* |
08e1d7c0 | 1879 | * Disable the auto-serialization of named objects creation methods. |
22b5afce | 1880 | * |
08e1d7c0 | 1881 | * This feature is enabled by default. It marks the AML control methods |
22b5afce BM |
1882 | * that contain the opcodes to create named objects as "Serialized". |
1883 | */ | |
08e1d7c0 | 1884 | static int __init acpi_no_auto_serialize_setup(char *str) |
1da177e4 | 1885 | { |
08e1d7c0 LZ |
1886 | acpi_gbl_auto_serialize_methods = FALSE; |
1887 | pr_info("ACPI: auto-serialization disabled\n"); | |
1da177e4 LT |
1888 | |
1889 | return 1; | |
1890 | } | |
1891 | ||
08e1d7c0 | 1892 | __setup("acpi_no_auto_serialize", acpi_no_auto_serialize_setup); |
1da177e4 | 1893 | |
df92e695 TR |
1894 | /* Check of resource interference between native drivers and ACPI |
1895 | * OperationRegions (SystemIO and System Memory only). | |
1896 | * IO ports and memory declared in ACPI might be used by the ACPI subsystem | |
1897 | * in arbitrary AML code and can interfere with legacy drivers. | |
1898 | * acpi_enforce_resources= can be set to: | |
1899 | * | |
7e90560c | 1900 | * - strict (default) (2) |
df92e695 | 1901 | * -> further driver trying to access the resources will not load |
7e90560c | 1902 | * - lax (1) |
df92e695 TR |
1903 | * -> further driver trying to access the resources will load, but you |
1904 | * get a system message that something might go wrong... | |
1905 | * | |
1906 | * - no (0) | |
1907 | * -> ACPI Operation Region resources will not be registered | |
1908 | * | |
1909 | */ | |
1910 | #define ENFORCE_RESOURCES_STRICT 2 | |
1911 | #define ENFORCE_RESOURCES_LAX 1 | |
1912 | #define ENFORCE_RESOURCES_NO 0 | |
1913 | ||
7e90560c | 1914 | static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; |
df92e695 TR |
1915 | |
1916 | static int __init acpi_enforce_resources_setup(char *str) | |
1917 | { | |
1918 | if (str == NULL || *str == '\0') | |
1919 | return 0; | |
1920 | ||
1921 | if (!strcmp("strict", str)) | |
1922 | acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; | |
1923 | else if (!strcmp("lax", str)) | |
1924 | acpi_enforce_resources = ENFORCE_RESOURCES_LAX; | |
1925 | else if (!strcmp("no", str)) | |
1926 | acpi_enforce_resources = ENFORCE_RESOURCES_NO; | |
1927 | ||
1928 | return 1; | |
1929 | } | |
1930 | ||
1931 | __setup("acpi_enforce_resources=", acpi_enforce_resources_setup); | |
1932 | ||
1933 | /* Check for resource conflicts between ACPI OperationRegions and native | |
1934 | * drivers */ | |
876fba43 | 1935 | int acpi_check_resource_conflict(const struct resource *res) |
df92e695 | 1936 | { |
f654c0fe LM |
1937 | acpi_adr_space_type space_id; |
1938 | acpi_size length; | |
1939 | u8 warn = 0; | |
1940 | int clash = 0; | |
df92e695 TR |
1941 | |
1942 | if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) | |
1943 | return 0; | |
1944 | if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM)) | |
1945 | return 0; | |
1946 | ||
f654c0fe LM |
1947 | if (res->flags & IORESOURCE_IO) |
1948 | space_id = ACPI_ADR_SPACE_SYSTEM_IO; | |
1949 | else | |
1950 | space_id = ACPI_ADR_SPACE_SYSTEM_MEMORY; | |
df92e695 | 1951 | |
e4f52244 | 1952 | length = resource_size(res); |
f654c0fe LM |
1953 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) |
1954 | warn = 1; | |
1955 | clash = acpi_check_address_range(space_id, res->start, length, warn); | |
df92e695 TR |
1956 | |
1957 | if (clash) { | |
1958 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) { | |
14f03343 JD |
1959 | if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX) |
1960 | printk(KERN_NOTICE "ACPI: This conflict may" | |
1961 | " cause random problems and system" | |
1962 | " instability\n"); | |
1963 | printk(KERN_INFO "ACPI: If an ACPI driver is available" | |
1964 | " for this device, you should use it instead of" | |
1965 | " the native driver\n"); | |
df92e695 TR |
1966 | } |
1967 | if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT) | |
1968 | return -EBUSY; | |
1969 | } | |
1970 | return 0; | |
1971 | } | |
443dea72 | 1972 | EXPORT_SYMBOL(acpi_check_resource_conflict); |
df92e695 TR |
1973 | |
1974 | int acpi_check_region(resource_size_t start, resource_size_t n, | |
1975 | const char *name) | |
1976 | { | |
1977 | struct resource res = { | |
1978 | .start = start, | |
1979 | .end = start + n - 1, | |
1980 | .name = name, | |
1981 | .flags = IORESOURCE_IO, | |
1982 | }; | |
1983 | ||
1984 | return acpi_check_resource_conflict(&res); | |
1985 | } | |
1986 | EXPORT_SYMBOL(acpi_check_region); | |
1987 | ||
70dd6bea JD |
1988 | /* |
1989 | * Let drivers know whether the resource checks are effective | |
1990 | */ | |
1991 | int acpi_resources_are_enforced(void) | |
1992 | { | |
1993 | return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT; | |
1994 | } | |
1995 | EXPORT_SYMBOL(acpi_resources_are_enforced); | |
1996 | ||
a87878ba HG |
1997 | bool acpi_osi_is_win8(void) |
1998 | { | |
1999 | return acpi_gbl_osi_data >= ACPI_OSI_WIN_8; | |
2000 | } | |
2001 | EXPORT_SYMBOL(acpi_osi_is_win8); | |
2002 | ||
9f63b88b LM |
2003 | /* |
2004 | * Deallocate the memory for a spinlock. | |
2005 | */ | |
2006 | void acpi_os_delete_lock(acpi_spinlock handle) | |
2007 | { | |
2008 | ACPI_FREE(handle); | |
2009 | } | |
2010 | ||
73459f73 RM |
2011 | /* |
2012 | * Acquire a spinlock. | |
2013 | * | |
2014 | * handle is a pointer to the spinlock_t. | |
73459f73 RM |
2015 | */ |
2016 | ||
967440e3 | 2017 | acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp) |
73459f73 | 2018 | { |
b8e4d893 | 2019 | acpi_cpu_flags flags; |
967440e3 | 2020 | spin_lock_irqsave(lockp, flags); |
73459f73 RM |
2021 | return flags; |
2022 | } | |
2023 | ||
2024 | /* | |
2025 | * Release a spinlock. See above. | |
2026 | */ | |
2027 | ||
967440e3 | 2028 | void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags) |
73459f73 | 2029 | { |
967440e3 | 2030 | spin_unlock_irqrestore(lockp, flags); |
73459f73 RM |
2031 | } |
2032 | ||
73459f73 RM |
2033 | #ifndef ACPI_USE_LOCAL_CACHE |
2034 | ||
2035 | /******************************************************************************* | |
2036 | * | |
2037 | * FUNCTION: acpi_os_create_cache | |
2038 | * | |
b229cf92 BM |
2039 | * PARAMETERS: name - Ascii name for the cache |
2040 | * size - Size of each cached object | |
2041 | * depth - Maximum depth of the cache (in objects) <ignored> | |
2042 | * cache - Where the new cache object is returned | |
73459f73 | 2043 | * |
b229cf92 | 2044 | * RETURN: status |
73459f73 RM |
2045 | * |
2046 | * DESCRIPTION: Create a cache object | |
2047 | * | |
2048 | ******************************************************************************/ | |
2049 | ||
2050 | acpi_status | |
4be44fcd | 2051 | acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache) |
73459f73 | 2052 | { |
20c2df83 | 2053 | *cache = kmem_cache_create(name, size, 0, 0, NULL); |
a6fdbf90 | 2054 | if (*cache == NULL) |
b229cf92 BM |
2055 | return AE_ERROR; |
2056 | else | |
2057 | return AE_OK; | |
73459f73 RM |
2058 | } |
2059 | ||
2060 | /******************************************************************************* | |
2061 | * | |
2062 | * FUNCTION: acpi_os_purge_cache | |
2063 | * | |
2064 | * PARAMETERS: Cache - Handle to cache object | |
2065 | * | |
2066 | * RETURN: Status | |
2067 | * | |
2068 | * DESCRIPTION: Free all objects within the requested cache. | |
2069 | * | |
2070 | ******************************************************************************/ | |
2071 | ||
4be44fcd | 2072 | acpi_status acpi_os_purge_cache(acpi_cache_t * cache) |
73459f73 | 2073 | { |
50dd0969 | 2074 | kmem_cache_shrink(cache); |
4be44fcd | 2075 | return (AE_OK); |
73459f73 RM |
2076 | } |
2077 | ||
2078 | /******************************************************************************* | |
2079 | * | |
2080 | * FUNCTION: acpi_os_delete_cache | |
2081 | * | |
2082 | * PARAMETERS: Cache - Handle to cache object | |
2083 | * | |
2084 | * RETURN: Status | |
2085 | * | |
2086 | * DESCRIPTION: Free all objects within the requested cache and delete the | |
2087 | * cache object. | |
2088 | * | |
2089 | ******************************************************************************/ | |
2090 | ||
4be44fcd | 2091 | acpi_status acpi_os_delete_cache(acpi_cache_t * cache) |
73459f73 | 2092 | { |
1a1d92c1 | 2093 | kmem_cache_destroy(cache); |
4be44fcd | 2094 | return (AE_OK); |
73459f73 RM |
2095 | } |
2096 | ||
2097 | /******************************************************************************* | |
2098 | * | |
2099 | * FUNCTION: acpi_os_release_object | |
2100 | * | |
2101 | * PARAMETERS: Cache - Handle to cache object | |
2102 | * Object - The object to be released | |
2103 | * | |
2104 | * RETURN: None | |
2105 | * | |
2106 | * DESCRIPTION: Release an object to the specified cache. If cache is full, | |
2107 | * the object is deleted. | |
2108 | * | |
2109 | ******************************************************************************/ | |
2110 | ||
4be44fcd | 2111 | acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object) |
73459f73 | 2112 | { |
4be44fcd LB |
2113 | kmem_cache_free(cache, object); |
2114 | return (AE_OK); | |
73459f73 | 2115 | } |
73459f73 | 2116 | #endif |
d362edaf | 2117 | |
a94e88cd | 2118 | static int __init acpi_no_static_ssdt_setup(char *s) |
b75dd297 | 2119 | { |
a94e88cd LZ |
2120 | acpi_gbl_disable_ssdt_table_install = TRUE; |
2121 | pr_info("ACPI: static SSDT installation disabled\n"); | |
b75dd297 | 2122 | |
a94e88cd | 2123 | return 0; |
b75dd297 LZ |
2124 | } |
2125 | ||
a94e88cd | 2126 | early_param("acpi_no_static_ssdt", acpi_no_static_ssdt_setup); |
b75dd297 | 2127 | |
4dde507f LZ |
2128 | static int __init acpi_disable_return_repair(char *s) |
2129 | { | |
2130 | printk(KERN_NOTICE PREFIX | |
2131 | "ACPI: Predefined validation mechanism disabled\n"); | |
2132 | acpi_gbl_disable_auto_repair = TRUE; | |
2133 | ||
2134 | return 1; | |
2135 | } | |
2136 | ||
2137 | __setup("acpica_no_return_repair", acpi_disable_return_repair); | |
2138 | ||
d362edaf MS |
2139 | acpi_status __init acpi_os_initialize(void) |
2140 | { | |
2141 | acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block); | |
2142 | acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block); | |
2143 | acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block); | |
2144 | acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block); | |
a4714a89 RW |
2145 | if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) { |
2146 | /* | |
2147 | * Use acpi_os_map_generic_address to pre-map the reset | |
2148 | * register if it's in system memory. | |
2149 | */ | |
2150 | int rv; | |
2151 | ||
2152 | rv = acpi_os_map_generic_address(&acpi_gbl_FADT.reset_register); | |
2153 | pr_debug(PREFIX "%s: map reset_reg status %d\n", __func__, rv); | |
2154 | } | |
7901a052 | 2155 | acpi_os_initialized = true; |
d362edaf MS |
2156 | |
2157 | return AE_OK; | |
2158 | } | |
2159 | ||
32d47eef | 2160 | acpi_status __init acpi_os_initialize1(void) |
d362edaf | 2161 | { |
44d2588e TH |
2162 | kacpid_wq = alloc_workqueue("kacpid", 0, 1); |
2163 | kacpi_notify_wq = alloc_workqueue("kacpi_notify", 0, 1); | |
d783156e | 2164 | kacpi_hotplug_wq = alloc_ordered_workqueue("kacpi_hotplug", 0); |
d362edaf MS |
2165 | BUG_ON(!kacpid_wq); |
2166 | BUG_ON(!kacpi_notify_wq); | |
2167 | BUG_ON(!kacpi_hotplug_wq); | |
1bd64d42 LB |
2168 | acpi_install_interface_handler(acpi_osi_handler); |
2169 | acpi_osi_setup_late(); | |
d362edaf MS |
2170 | return AE_OK; |
2171 | } | |
2172 | ||
2173 | acpi_status acpi_os_terminate(void) | |
2174 | { | |
2175 | if (acpi_irq_handler) { | |
23fe3630 | 2176 | acpi_os_remove_interrupt_handler(acpi_gbl_FADT.sci_interrupt, |
d362edaf MS |
2177 | acpi_irq_handler); |
2178 | } | |
2179 | ||
2180 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe1_block); | |
2181 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block); | |
2182 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block); | |
2183 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block); | |
a4714a89 RW |
2184 | if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) |
2185 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.reset_register); | |
d362edaf MS |
2186 | |
2187 | destroy_workqueue(kacpid_wq); | |
2188 | destroy_workqueue(kacpi_notify_wq); | |
2189 | destroy_workqueue(kacpi_hotplug_wq); | |
2190 | ||
2191 | return AE_OK; | |
2192 | } | |
09f98a82 TL |
2193 | |
2194 | acpi_status acpi_os_prepare_sleep(u8 sleep_state, u32 pm1a_control, | |
2195 | u32 pm1b_control) | |
2196 | { | |
2197 | int rc = 0; | |
2198 | if (__acpi_os_prepare_sleep) | |
2199 | rc = __acpi_os_prepare_sleep(sleep_state, | |
2200 | pm1a_control, pm1b_control); | |
2201 | if (rc < 0) | |
2202 | return AE_ERROR; | |
2203 | else if (rc > 0) | |
2204 | return AE_CTRL_SKIP; | |
2205 | ||
2206 | return AE_OK; | |
2207 | } | |
2208 | ||
2209 | void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state, | |
2210 | u32 pm1a_ctrl, u32 pm1b_ctrl)) | |
2211 | { | |
2212 | __acpi_os_prepare_sleep = func; | |
2213 | } | |
92d8aff3 | 2214 | |
d6b47b12 BG |
2215 | acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state, u32 val_a, |
2216 | u32 val_b) | |
2217 | { | |
2218 | int rc = 0; | |
2219 | if (__acpi_os_prepare_extended_sleep) | |
2220 | rc = __acpi_os_prepare_extended_sleep(sleep_state, | |
2221 | val_a, val_b); | |
2222 | if (rc < 0) | |
2223 | return AE_ERROR; | |
2224 | else if (rc > 0) | |
2225 | return AE_CTRL_SKIP; | |
2226 | ||
2227 | return AE_OK; | |
2228 | } | |
2229 | ||
2230 | void acpi_os_set_prepare_extended_sleep(int (*func)(u8 sleep_state, | |
2231 | u32 val_a, u32 val_b)) | |
2232 | { | |
2233 | __acpi_os_prepare_extended_sleep = func; | |
2234 | } |