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c942fddf | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
1da177e4 LT |
2 | /* |
3 | * acpi_osl.c - OS-dependent functions ($Revision: 83 $) | |
4 | * | |
5 | * Copyright (C) 2000 Andrew Henroid | |
6 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> | |
7 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
f1241c87 MW |
8 | * Copyright (c) 2008 Intel Corporation |
9 | * Author: Matthew Wilcox <willy@linux.intel.com> | |
1da177e4 LT |
10 | */ |
11 | ||
1da177e4 LT |
12 | #include <linux/module.h> |
13 | #include <linux/kernel.h> | |
14 | #include <linux/slab.h> | |
15 | #include <linux/mm.h> | |
ba242d5b | 16 | #include <linux/highmem.h> |
1da177e4 | 17 | #include <linux/pci.h> |
1da177e4 LT |
18 | #include <linux/interrupt.h> |
19 | #include <linux/kmod.h> | |
20 | #include <linux/delay.h> | |
21 | #include <linux/workqueue.h> | |
22 | #include <linux/nmi.h> | |
ad71860a | 23 | #include <linux/acpi.h> |
1da177e4 | 24 | #include <linux/efi.h> |
df92e695 TR |
25 | #include <linux/ioport.h> |
26 | #include <linux/list.h> | |
f1241c87 MW |
27 | #include <linux/jiffies.h> |
28 | #include <linux/semaphore.h> | |
29 | ||
30 | #include <asm/io.h> | |
7c0f6ba6 | 31 | #include <linux/uaccess.h> |
2f8e2c87 | 32 | #include <linux/io-64-nonatomic-lo-hi.h> |
f1241c87 | 33 | |
d2d2e3c4 HK |
34 | #include "acpica/accommon.h" |
35 | #include "acpica/acnamesp.h" | |
1129c92f | 36 | #include "internal.h" |
1da177e4 | 37 | |
1da177e4 | 38 | #define _COMPONENT ACPI_OS_SERVICES |
f52fd66d | 39 | ACPI_MODULE_NAME("osl"); |
07070e12 | 40 | |
4be44fcd LB |
41 | struct acpi_os_dpc { |
42 | acpi_osd_exec_callback function; | |
43 | void *context; | |
65f27f38 | 44 | struct work_struct work; |
1da177e4 LT |
45 | }; |
46 | ||
1da177e4 LT |
47 | #ifdef ENABLE_DEBUGGER |
48 | #include <linux/kdb.h> | |
49 | ||
50 | /* stuff for debugger support */ | |
51 | int acpi_in_debugger; | |
52 | EXPORT_SYMBOL(acpi_in_debugger); | |
4be44fcd | 53 | #endif /*ENABLE_DEBUGGER */ |
1da177e4 | 54 | |
09f98a82 TL |
55 | static int (*__acpi_os_prepare_sleep)(u8 sleep_state, u32 pm1a_ctrl, |
56 | u32 pm1b_ctrl); | |
d6b47b12 BG |
57 | static int (*__acpi_os_prepare_extended_sleep)(u8 sleep_state, u32 val_a, |
58 | u32 val_b); | |
09f98a82 | 59 | |
1da177e4 LT |
60 | static acpi_osd_handler acpi_irq_handler; |
61 | static void *acpi_irq_context; | |
62 | static struct workqueue_struct *kacpid_wq; | |
88db5e14 | 63 | static struct workqueue_struct *kacpi_notify_wq; |
92d8aff3 | 64 | static struct workqueue_struct *kacpi_hotplug_wq; |
7901a052 | 65 | static bool acpi_os_initialized; |
49e4b843 | 66 | unsigned int acpi_sci_irq = INVALID_ACPI_IRQ; |
8d3523fb | 67 | bool acpi_permanent_mmap = false; |
1da177e4 | 68 | |
620242ae MS |
69 | /* |
70 | * This list of permanent mappings is for memory that may be accessed from | |
71 | * interrupt context, where we can't do the ioremap(). | |
72 | */ | |
73 | struct acpi_ioremap { | |
74 | struct list_head list; | |
75 | void __iomem *virt; | |
76 | acpi_physical_address phys; | |
77 | acpi_size size; | |
b7c1fadd | 78 | unsigned long refcount; |
620242ae MS |
79 | }; |
80 | ||
81 | static LIST_HEAD(acpi_ioremaps); | |
7bbb8903 | 82 | static DEFINE_MUTEX(acpi_ioremap_lock); |
620242ae | 83 | |
bc9ffce2 | 84 | static void __init acpi_request_region (struct acpi_generic_address *gas, |
9a47cdb1 BH |
85 | unsigned int length, char *desc) |
86 | { | |
bc9ffce2 MS |
87 | u64 addr; |
88 | ||
89 | /* Handle possible alignment issues */ | |
90 | memcpy(&addr, &gas->address, sizeof(addr)); | |
91 | if (!addr || !length) | |
9a47cdb1 BH |
92 | return; |
93 | ||
0294112e RW |
94 | /* Resources are never freed */ |
95 | if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_IO) | |
96 | request_region(addr, length, desc); | |
97 | else if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) | |
98 | request_mem_region(addr, length, desc); | |
9a47cdb1 BH |
99 | } |
100 | ||
0294112e | 101 | static int __init acpi_reserve_resources(void) |
9a47cdb1 | 102 | { |
eee3c859 | 103 | acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
104 | "ACPI PM1a_EVT_BLK"); |
105 | ||
eee3c859 | 106 | acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
107 | "ACPI PM1b_EVT_BLK"); |
108 | ||
eee3c859 | 109 | acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
110 | "ACPI PM1a_CNT_BLK"); |
111 | ||
eee3c859 | 112 | acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
113 | "ACPI PM1b_CNT_BLK"); |
114 | ||
eee3c859 LB |
115 | if (acpi_gbl_FADT.pm_timer_length == 4) |
116 | acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR"); | |
9a47cdb1 | 117 | |
eee3c859 | 118 | acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length, |
9a47cdb1 BH |
119 | "ACPI PM2_CNT_BLK"); |
120 | ||
121 | /* Length of GPE blocks must be a non-negative multiple of 2 */ | |
122 | ||
eee3c859 LB |
123 | if (!(acpi_gbl_FADT.gpe0_block_length & 0x1)) |
124 | acpi_request_region(&acpi_gbl_FADT.xgpe0_block, | |
125 | acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK"); | |
9a47cdb1 | 126 | |
eee3c859 LB |
127 | if (!(acpi_gbl_FADT.gpe1_block_length & 0x1)) |
128 | acpi_request_region(&acpi_gbl_FADT.xgpe1_block, | |
129 | acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK"); | |
0294112e RW |
130 | |
131 | return 0; | |
9a47cdb1 | 132 | } |
0294112e | 133 | fs_initcall_sync(acpi_reserve_resources); |
9a47cdb1 | 134 | |
4be44fcd | 135 | void acpi_os_printf(const char *fmt, ...) |
1da177e4 LT |
136 | { |
137 | va_list args; | |
138 | va_start(args, fmt); | |
139 | acpi_os_vprintf(fmt, args); | |
140 | va_end(args); | |
141 | } | |
836d0830 | 142 | EXPORT_SYMBOL(acpi_os_printf); |
4be44fcd | 143 | |
4be44fcd | 144 | void acpi_os_vprintf(const char *fmt, va_list args) |
1da177e4 LT |
145 | { |
146 | static char buffer[512]; | |
4be44fcd | 147 | |
1da177e4 LT |
148 | vsprintf(buffer, fmt, args); |
149 | ||
150 | #ifdef ENABLE_DEBUGGER | |
151 | if (acpi_in_debugger) { | |
152 | kdb_printf("%s", buffer); | |
153 | } else { | |
abc4b9a5 JP |
154 | if (printk_get_level(buffer)) |
155 | printk("%s", buffer); | |
156 | else | |
157 | printk(KERN_CONT "%s", buffer); | |
1da177e4 LT |
158 | } |
159 | #else | |
abc4b9a5 JP |
160 | if (acpi_debugger_write_log(buffer) < 0) { |
161 | if (printk_get_level(buffer)) | |
162 | printk("%s", buffer); | |
163 | else | |
164 | printk(KERN_CONT "%s", buffer); | |
165 | } | |
1da177e4 LT |
166 | #endif |
167 | } | |
168 | ||
4996c023 TI |
169 | #ifdef CONFIG_KEXEC |
170 | static unsigned long acpi_rsdp; | |
171 | static int __init setup_acpi_rsdp(char *arg) | |
172 | { | |
5dcb9ca8 | 173 | return kstrtoul(arg, 16, &acpi_rsdp); |
4996c023 TI |
174 | } |
175 | early_param("acpi_rsdp", setup_acpi_rsdp); | |
176 | #endif | |
177 | ||
ad71860a | 178 | acpi_physical_address __init acpi_os_get_root_pointer(void) |
1da177e4 | 179 | { |
dfc9327a | 180 | acpi_physical_address pa; |
2fb65f09 | 181 | |
4996c023 TI |
182 | #ifdef CONFIG_KEXEC |
183 | if (acpi_rsdp) | |
184 | return acpi_rsdp; | |
185 | #endif | |
dfc9327a JG |
186 | pa = acpi_arch_get_root_pointer(); |
187 | if (pa) | |
188 | return pa; | |
4996c023 | 189 | |
83e68189 | 190 | if (efi_enabled(EFI_CONFIG_TABLES)) { |
b2c99e3c | 191 | if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) |
ad71860a | 192 | return efi.acpi20; |
2fb65f09 | 193 | if (efi.acpi != EFI_INVALID_TABLE_ADDR) |
ad71860a | 194 | return efi.acpi; |
2fb65f09 | 195 | pr_err(PREFIX "System description tables not found\n"); |
8a1664be | 196 | } else if (IS_ENABLED(CONFIG_ACPI_LEGACY_TABLES_LOOKUP)) { |
239665a3 | 197 | acpi_find_root_pointer(&pa); |
239665a3 | 198 | } |
8a1664be | 199 | |
2fb65f09 | 200 | return pa; |
1da177e4 LT |
201 | } |
202 | ||
78cdb3ed | 203 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ |
4a3cba5e MS |
204 | static struct acpi_ioremap * |
205 | acpi_map_lookup(acpi_physical_address phys, acpi_size size) | |
620242ae MS |
206 | { |
207 | struct acpi_ioremap *map; | |
208 | ||
78cdb3ed | 209 | list_for_each_entry_rcu(map, &acpi_ioremaps, list) |
620242ae MS |
210 | if (map->phys <= phys && |
211 | phys + size <= map->phys + map->size) | |
4a3cba5e MS |
212 | return map; |
213 | ||
214 | return NULL; | |
215 | } | |
216 | ||
217 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ | |
218 | static void __iomem * | |
219 | acpi_map_vaddr_lookup(acpi_physical_address phys, unsigned int size) | |
220 | { | |
221 | struct acpi_ioremap *map; | |
222 | ||
223 | map = acpi_map_lookup(phys, size); | |
224 | if (map) | |
225 | return map->virt + (phys - map->phys); | |
620242ae MS |
226 | |
227 | return NULL; | |
228 | } | |
229 | ||
13606a2d RW |
230 | void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size) |
231 | { | |
232 | struct acpi_ioremap *map; | |
233 | void __iomem *virt = NULL; | |
234 | ||
235 | mutex_lock(&acpi_ioremap_lock); | |
236 | map = acpi_map_lookup(phys, size); | |
237 | if (map) { | |
238 | virt = map->virt + (phys - map->phys); | |
239 | map->refcount++; | |
240 | } | |
241 | mutex_unlock(&acpi_ioremap_lock); | |
242 | return virt; | |
243 | } | |
244 | EXPORT_SYMBOL_GPL(acpi_os_get_iomem); | |
245 | ||
78cdb3ed | 246 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ |
620242ae MS |
247 | static struct acpi_ioremap * |
248 | acpi_map_lookup_virt(void __iomem *virt, acpi_size size) | |
249 | { | |
250 | struct acpi_ioremap *map; | |
251 | ||
78cdb3ed | 252 | list_for_each_entry_rcu(map, &acpi_ioremaps, list) |
4a3cba5e MS |
253 | if (map->virt <= virt && |
254 | virt + size <= map->virt + map->size) | |
620242ae MS |
255 | return map; |
256 | ||
257 | return NULL; | |
258 | } | |
259 | ||
aafc65c7 | 260 | #if defined(CONFIG_IA64) || defined(CONFIG_ARM64) |
ba242d5b MS |
261 | /* ioremap will take care of cache attributes */ |
262 | #define should_use_kmap(pfn) 0 | |
aafc65c7 GG |
263 | #else |
264 | #define should_use_kmap(pfn) page_is_ram(pfn) | |
ba242d5b MS |
265 | #endif |
266 | ||
267 | static void __iomem *acpi_map(acpi_physical_address pg_off, unsigned long pg_sz) | |
268 | { | |
269 | unsigned long pfn; | |
270 | ||
271 | pfn = pg_off >> PAGE_SHIFT; | |
272 | if (should_use_kmap(pfn)) { | |
273 | if (pg_sz > PAGE_SIZE) | |
274 | return NULL; | |
275 | return (void __iomem __force *)kmap(pfn_to_page(pfn)); | |
276 | } else | |
277 | return acpi_os_ioremap(pg_off, pg_sz); | |
278 | } | |
279 | ||
280 | static void acpi_unmap(acpi_physical_address pg_off, void __iomem *vaddr) | |
281 | { | |
282 | unsigned long pfn; | |
283 | ||
284 | pfn = pg_off >> PAGE_SHIFT; | |
e252675f | 285 | if (should_use_kmap(pfn)) |
ba242d5b MS |
286 | kunmap(pfn_to_page(pfn)); |
287 | else | |
288 | iounmap(vaddr); | |
289 | } | |
290 | ||
9d128ed1 RW |
291 | /** |
292 | * acpi_os_map_iomem - Get a virtual address for a given physical address range. | |
293 | * @phys: Start of the physical address range to map. | |
294 | * @size: Size of the physical address range to map. | |
295 | * | |
296 | * Look up the given physical address range in the list of existing ACPI memory | |
297 | * mappings. If found, get a reference to it and return a pointer to it (its | |
298 | * virtual address). If not found, map it, add it to that list and return a | |
299 | * pointer to it. | |
300 | * | |
8d3523fb | 301 | * During early init (when acpi_permanent_mmap has not been set yet) this |
9d128ed1 RW |
302 | * routine simply calls __acpi_map_table() to get the job done. |
303 | */ | |
bd721ea7 | 304 | void __iomem *__ref |
a238317c | 305 | acpi_os_map_iomem(acpi_physical_address phys, acpi_size size) |
1da177e4 | 306 | { |
7ffd0443 | 307 | struct acpi_ioremap *map; |
620242ae | 308 | void __iomem *virt; |
2d6d9fd3 RW |
309 | acpi_physical_address pg_off; |
310 | acpi_size pg_sz; | |
620242ae | 311 | |
9f4fd61f BH |
312 | if (phys > ULONG_MAX) { |
313 | printk(KERN_ERR PREFIX "Cannot map memory that high\n"); | |
70c0846e | 314 | return NULL; |
1da177e4 | 315 | } |
620242ae | 316 | |
8d3523fb | 317 | if (!acpi_permanent_mmap) |
ad71860a | 318 | return __acpi_map_table((unsigned long)phys, size); |
620242ae | 319 | |
7ffd0443 RW |
320 | mutex_lock(&acpi_ioremap_lock); |
321 | /* Check if there's a suitable mapping already. */ | |
322 | map = acpi_map_lookup(phys, size); | |
323 | if (map) { | |
b7c1fadd | 324 | map->refcount++; |
7ffd0443 RW |
325 | goto out; |
326 | } | |
327 | ||
620242ae | 328 | map = kzalloc(sizeof(*map), GFP_KERNEL); |
7ffd0443 RW |
329 | if (!map) { |
330 | mutex_unlock(&acpi_ioremap_lock); | |
620242ae | 331 | return NULL; |
7ffd0443 | 332 | } |
620242ae | 333 | |
4a3cba5e MS |
334 | pg_off = round_down(phys, PAGE_SIZE); |
335 | pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off; | |
ba242d5b | 336 | virt = acpi_map(pg_off, pg_sz); |
620242ae | 337 | if (!virt) { |
7ffd0443 | 338 | mutex_unlock(&acpi_ioremap_lock); |
620242ae MS |
339 | kfree(map); |
340 | return NULL; | |
341 | } | |
342 | ||
343 | INIT_LIST_HEAD(&map->list); | |
344 | map->virt = virt; | |
4a3cba5e MS |
345 | map->phys = pg_off; |
346 | map->size = pg_sz; | |
b7c1fadd | 347 | map->refcount = 1; |
620242ae | 348 | |
78cdb3ed | 349 | list_add_tail_rcu(&map->list, &acpi_ioremaps); |
620242ae | 350 | |
a238317c | 351 | out: |
7ffd0443 | 352 | mutex_unlock(&acpi_ioremap_lock); |
4a3cba5e | 353 | return map->virt + (phys - map->phys); |
1da177e4 | 354 | } |
a238317c LZ |
355 | EXPORT_SYMBOL_GPL(acpi_os_map_iomem); |
356 | ||
bd721ea7 | 357 | void *__ref acpi_os_map_memory(acpi_physical_address phys, acpi_size size) |
a238317c LZ |
358 | { |
359 | return (void *)acpi_os_map_iomem(phys, size); | |
360 | } | |
55a82ab3 | 361 | EXPORT_SYMBOL_GPL(acpi_os_map_memory); |
1da177e4 | 362 | |
b7c1fadd | 363 | static void acpi_os_drop_map_ref(struct acpi_ioremap *map) |
4a3cba5e | 364 | { |
b7c1fadd RW |
365 | if (!--map->refcount) |
366 | list_del_rcu(&map->list); | |
4a3cba5e | 367 | } |
4a3cba5e | 368 | |
b7c1fadd | 369 | static void acpi_os_map_cleanup(struct acpi_ioremap *map) |
7fe135dc | 370 | { |
b7c1fadd | 371 | if (!map->refcount) { |
74b51ee1 | 372 | synchronize_rcu_expedited(); |
ba242d5b | 373 | acpi_unmap(map->phys, map->virt); |
b7c1fadd RW |
374 | kfree(map); |
375 | } | |
4a3cba5e MS |
376 | } |
377 | ||
9d128ed1 RW |
378 | /** |
379 | * acpi_os_unmap_iomem - Drop a memory mapping reference. | |
380 | * @virt: Start of the address range to drop a reference to. | |
381 | * @size: Size of the address range to drop a reference to. | |
382 | * | |
383 | * Look up the given virtual address range in the list of existing ACPI memory | |
384 | * mappings, drop a reference to it and unmap it if there are no more active | |
385 | * references to it. | |
386 | * | |
8d3523fb | 387 | * During early init (when acpi_permanent_mmap has not been set yet) this |
9d128ed1 RW |
388 | * routine simply calls __acpi_unmap_table() to get the job done. Since |
389 | * __acpi_unmap_table() is an __init function, the __ref annotation is needed | |
390 | * here. | |
391 | */ | |
a238317c | 392 | void __ref acpi_os_unmap_iomem(void __iomem *virt, acpi_size size) |
1da177e4 | 393 | { |
620242ae | 394 | struct acpi_ioremap *map; |
620242ae | 395 | |
8d3523fb | 396 | if (!acpi_permanent_mmap) { |
7d97277b | 397 | __acpi_unmap_table(virt, size); |
620242ae MS |
398 | return; |
399 | } | |
400 | ||
7bbb8903 | 401 | mutex_lock(&acpi_ioremap_lock); |
620242ae MS |
402 | map = acpi_map_lookup_virt(virt, size); |
403 | if (!map) { | |
7bbb8903 | 404 | mutex_unlock(&acpi_ioremap_lock); |
7fe135dc | 405 | WARN(true, PREFIX "%s: bad address %p\n", __func__, virt); |
620242ae MS |
406 | return; |
407 | } | |
b7c1fadd | 408 | acpi_os_drop_map_ref(map); |
7bbb8903 | 409 | mutex_unlock(&acpi_ioremap_lock); |
620242ae | 410 | |
b7c1fadd | 411 | acpi_os_map_cleanup(map); |
1da177e4 | 412 | } |
a238317c LZ |
413 | EXPORT_SYMBOL_GPL(acpi_os_unmap_iomem); |
414 | ||
415 | void __ref acpi_os_unmap_memory(void *virt, acpi_size size) | |
416 | { | |
417 | return acpi_os_unmap_iomem((void __iomem *)virt, size); | |
418 | } | |
55a82ab3 | 419 | EXPORT_SYMBOL_GPL(acpi_os_unmap_memory); |
1da177e4 | 420 | |
6f68c91c | 421 | int acpi_os_map_generic_address(struct acpi_generic_address *gas) |
29718521 | 422 | { |
bc9ffce2 | 423 | u64 addr; |
29718521 MS |
424 | void __iomem *virt; |
425 | ||
bc9ffce2 | 426 | if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) |
29718521 MS |
427 | return 0; |
428 | ||
bc9ffce2 MS |
429 | /* Handle possible alignment issues */ |
430 | memcpy(&addr, &gas->address, sizeof(addr)); | |
431 | if (!addr || !gas->bit_width) | |
29718521 MS |
432 | return -EINVAL; |
433 | ||
a238317c | 434 | virt = acpi_os_map_iomem(addr, gas->bit_width / 8); |
29718521 MS |
435 | if (!virt) |
436 | return -EIO; | |
437 | ||
438 | return 0; | |
439 | } | |
6f68c91c | 440 | EXPORT_SYMBOL(acpi_os_map_generic_address); |
29718521 | 441 | |
6f68c91c | 442 | void acpi_os_unmap_generic_address(struct acpi_generic_address *gas) |
29718521 | 443 | { |
bc9ffce2 | 444 | u64 addr; |
7fe135dc | 445 | struct acpi_ioremap *map; |
29718521 | 446 | |
bc9ffce2 | 447 | if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) |
29718521 MS |
448 | return; |
449 | ||
bc9ffce2 MS |
450 | /* Handle possible alignment issues */ |
451 | memcpy(&addr, &gas->address, sizeof(addr)); | |
452 | if (!addr || !gas->bit_width) | |
29718521 MS |
453 | return; |
454 | ||
7bbb8903 | 455 | mutex_lock(&acpi_ioremap_lock); |
bc9ffce2 | 456 | map = acpi_map_lookup(addr, gas->bit_width / 8); |
7fe135dc RW |
457 | if (!map) { |
458 | mutex_unlock(&acpi_ioremap_lock); | |
459 | return; | |
460 | } | |
b7c1fadd | 461 | acpi_os_drop_map_ref(map); |
7bbb8903 | 462 | mutex_unlock(&acpi_ioremap_lock); |
29718521 | 463 | |
b7c1fadd | 464 | acpi_os_map_cleanup(map); |
29718521 | 465 | } |
6f68c91c | 466 | EXPORT_SYMBOL(acpi_os_unmap_generic_address); |
29718521 | 467 | |
1da177e4 LT |
468 | #ifdef ACPI_FUTURE_USAGE |
469 | acpi_status | |
4be44fcd | 470 | acpi_os_get_physical_address(void *virt, acpi_physical_address * phys) |
1da177e4 | 471 | { |
4be44fcd | 472 | if (!phys || !virt) |
1da177e4 LT |
473 | return AE_BAD_PARAMETER; |
474 | ||
475 | *phys = virt_to_phys(virt); | |
476 | ||
477 | return AE_OK; | |
478 | } | |
479 | #endif | |
480 | ||
18d78b64 RW |
481 | #ifdef CONFIG_ACPI_REV_OVERRIDE_POSSIBLE |
482 | static bool acpi_rev_override; | |
483 | ||
484 | int __init acpi_rev_override_setup(char *str) | |
485 | { | |
486 | acpi_rev_override = true; | |
487 | return 1; | |
488 | } | |
489 | __setup("acpi_rev_override", acpi_rev_override_setup); | |
490 | #else | |
491 | #define acpi_rev_override false | |
492 | #endif | |
493 | ||
1da177e4 LT |
494 | #define ACPI_MAX_OVERRIDE_LEN 100 |
495 | ||
496 | static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN]; | |
497 | ||
498 | acpi_status | |
4be44fcd | 499 | acpi_os_predefined_override(const struct acpi_predefined_names *init_val, |
80b28810 | 500 | acpi_string *new_val) |
1da177e4 LT |
501 | { |
502 | if (!init_val || !new_val) | |
503 | return AE_BAD_PARAMETER; | |
504 | ||
505 | *new_val = NULL; | |
4be44fcd | 506 | if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) { |
1da177e4 | 507 | printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n", |
4be44fcd | 508 | acpi_os_name); |
1da177e4 LT |
509 | *new_val = acpi_os_name; |
510 | } | |
511 | ||
18d78b64 RW |
512 | if (!memcmp(init_val->name, "_REV", 4) && acpi_rev_override) { |
513 | printk(KERN_INFO PREFIX "Overriding _REV return value to 5\n"); | |
514 | *new_val = (char *)5; | |
515 | } | |
516 | ||
1da177e4 LT |
517 | return AE_OK; |
518 | } | |
519 | ||
7d12e780 | 520 | static irqreturn_t acpi_irq(int irq, void *dev_id) |
1da177e4 | 521 | { |
5229e87d LB |
522 | u32 handled; |
523 | ||
524 | handled = (*acpi_irq_handler) (acpi_irq_context); | |
525 | ||
526 | if (handled) { | |
527 | acpi_irq_handled++; | |
528 | return IRQ_HANDLED; | |
88bea188 LB |
529 | } else { |
530 | acpi_irq_not_handled++; | |
5229e87d | 531 | return IRQ_NONE; |
88bea188 | 532 | } |
1da177e4 LT |
533 | } |
534 | ||
535 | acpi_status | |
4be44fcd LB |
536 | acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler, |
537 | void *context) | |
1da177e4 LT |
538 | { |
539 | unsigned int irq; | |
540 | ||
5229e87d LB |
541 | acpi_irq_stats_init(); |
542 | ||
1da177e4 | 543 | /* |
23fe3630 RW |
544 | * ACPI interrupts different from the SCI in our copy of the FADT are |
545 | * not supported. | |
1da177e4 | 546 | */ |
23fe3630 RW |
547 | if (gsi != acpi_gbl_FADT.sci_interrupt) |
548 | return AE_BAD_PARAMETER; | |
549 | ||
550 | if (acpi_irq_handler) | |
551 | return AE_ALREADY_ACQUIRED; | |
552 | ||
1da177e4 LT |
553 | if (acpi_gsi_to_irq(gsi, &irq) < 0) { |
554 | printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n", | |
555 | gsi); | |
556 | return AE_OK; | |
557 | } | |
558 | ||
559 | acpi_irq_handler = handler; | |
560 | acpi_irq_context = context; | |
a8d46b9e | 561 | if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) { |
1da177e4 | 562 | printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq); |
23fe3630 | 563 | acpi_irq_handler = NULL; |
1da177e4 LT |
564 | return AE_NOT_ACQUIRED; |
565 | } | |
49e4b843 | 566 | acpi_sci_irq = irq; |
1da177e4 LT |
567 | |
568 | return AE_OK; | |
569 | } | |
570 | ||
49e4b843 | 571 | acpi_status acpi_os_remove_interrupt_handler(u32 gsi, acpi_osd_handler handler) |
1da177e4 | 572 | { |
49e4b843 | 573 | if (gsi != acpi_gbl_FADT.sci_interrupt || !acpi_sci_irq_valid()) |
23fe3630 RW |
574 | return AE_BAD_PARAMETER; |
575 | ||
49e4b843 | 576 | free_irq(acpi_sci_irq, acpi_irq); |
23fe3630 | 577 | acpi_irq_handler = NULL; |
49e4b843 | 578 | acpi_sci_irq = INVALID_ACPI_IRQ; |
1da177e4 LT |
579 | |
580 | return AE_OK; | |
581 | } | |
582 | ||
583 | /* | |
584 | * Running in interpreter thread context, safe to sleep | |
585 | */ | |
586 | ||
439913ff | 587 | void acpi_os_sleep(u64 ms) |
1da177e4 | 588 | { |
30282299 | 589 | msleep(ms); |
1da177e4 | 590 | } |
4be44fcd | 591 | |
4be44fcd | 592 | void acpi_os_stall(u32 us) |
1da177e4 LT |
593 | { |
594 | while (us) { | |
595 | u32 delay = 1000; | |
596 | ||
597 | if (delay > us) | |
598 | delay = us; | |
599 | udelay(delay); | |
600 | touch_nmi_watchdog(); | |
601 | us -= delay; | |
602 | } | |
603 | } | |
4be44fcd | 604 | |
1da177e4 | 605 | /* |
83b2348e BVA |
606 | * Support ACPI 3.0 AML Timer operand. Returns a 64-bit free-running, |
607 | * monotonically increasing timer with 100ns granularity. Do not use | |
608 | * ktime_get() to implement this function because this function may get | |
609 | * called after timekeeping has been suspended. Note: calling this function | |
610 | * after timekeeping has been suspended may lead to unexpected results | |
611 | * because when timekeeping is suspended the jiffies counter is not | |
612 | * incremented. See also timekeeping_suspend(). | |
1da177e4 | 613 | */ |
4be44fcd | 614 | u64 acpi_os_get_timer(void) |
1da177e4 | 615 | { |
83b2348e BVA |
616 | return (get_jiffies_64() - INITIAL_JIFFIES) * |
617 | (ACPI_100NSEC_PER_SEC / HZ); | |
1da177e4 LT |
618 | } |
619 | ||
4be44fcd | 620 | acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width) |
1da177e4 LT |
621 | { |
622 | u32 dummy; | |
623 | ||
624 | if (!value) | |
625 | value = &dummy; | |
626 | ||
49fbabf5 ZY |
627 | *value = 0; |
628 | if (width <= 8) { | |
4be44fcd | 629 | *(u8 *) value = inb(port); |
49fbabf5 | 630 | } else if (width <= 16) { |
4be44fcd | 631 | *(u16 *) value = inw(port); |
49fbabf5 | 632 | } else if (width <= 32) { |
4be44fcd | 633 | *(u32 *) value = inl(port); |
49fbabf5 | 634 | } else { |
1da177e4 LT |
635 | BUG(); |
636 | } | |
637 | ||
638 | return AE_OK; | |
639 | } | |
4be44fcd | 640 | |
1da177e4 LT |
641 | EXPORT_SYMBOL(acpi_os_read_port); |
642 | ||
4be44fcd | 643 | acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width) |
1da177e4 | 644 | { |
49fbabf5 | 645 | if (width <= 8) { |
1da177e4 | 646 | outb(value, port); |
49fbabf5 | 647 | } else if (width <= 16) { |
1da177e4 | 648 | outw(value, port); |
49fbabf5 | 649 | } else if (width <= 32) { |
1da177e4 | 650 | outl(value, port); |
49fbabf5 | 651 | } else { |
1da177e4 LT |
652 | BUG(); |
653 | } | |
654 | ||
655 | return AE_OK; | |
656 | } | |
4be44fcd | 657 | |
1da177e4 LT |
658 | EXPORT_SYMBOL(acpi_os_write_port); |
659 | ||
eeb2d80d SP |
660 | int acpi_os_read_iomem(void __iomem *virt_addr, u64 *value, u32 width) |
661 | { | |
662 | ||
663 | switch (width) { | |
664 | case 8: | |
665 | *(u8 *) value = readb(virt_addr); | |
666 | break; | |
667 | case 16: | |
668 | *(u16 *) value = readw(virt_addr); | |
669 | break; | |
670 | case 32: | |
671 | *(u32 *) value = readl(virt_addr); | |
672 | break; | |
673 | case 64: | |
674 | *(u64 *) value = readq(virt_addr); | |
675 | break; | |
676 | default: | |
677 | return -EINVAL; | |
678 | } | |
679 | ||
680 | return 0; | |
681 | } | |
682 | ||
e615bf5b | 683 | acpi_status |
653f4b53 | 684 | acpi_os_read_memory(acpi_physical_address phys_addr, u64 *value, u32 width) |
e615bf5b MS |
685 | { |
686 | void __iomem *virt_addr; | |
687 | unsigned int size = width / 8; | |
688 | bool unmap = false; | |
689 | u64 dummy; | |
eeb2d80d | 690 | int error; |
e615bf5b MS |
691 | |
692 | rcu_read_lock(); | |
693 | virt_addr = acpi_map_vaddr_lookup(phys_addr, size); | |
694 | if (!virt_addr) { | |
695 | rcu_read_unlock(); | |
696 | virt_addr = acpi_os_ioremap(phys_addr, size); | |
697 | if (!virt_addr) | |
698 | return AE_BAD_ADDRESS; | |
699 | unmap = true; | |
700 | } | |
701 | ||
702 | if (!value) | |
703 | value = &dummy; | |
704 | ||
eeb2d80d SP |
705 | error = acpi_os_read_iomem(virt_addr, value, width); |
706 | BUG_ON(error); | |
e615bf5b MS |
707 | |
708 | if (unmap) | |
709 | iounmap(virt_addr); | |
710 | else | |
711 | rcu_read_unlock(); | |
712 | ||
713 | return AE_OK; | |
714 | } | |
715 | ||
e615bf5b | 716 | acpi_status |
653f4b53 | 717 | acpi_os_write_memory(acpi_physical_address phys_addr, u64 value, u32 width) |
e615bf5b MS |
718 | { |
719 | void __iomem *virt_addr; | |
720 | unsigned int size = width / 8; | |
721 | bool unmap = false; | |
722 | ||
723 | rcu_read_lock(); | |
724 | virt_addr = acpi_map_vaddr_lookup(phys_addr, size); | |
725 | if (!virt_addr) { | |
726 | rcu_read_unlock(); | |
727 | virt_addr = acpi_os_ioremap(phys_addr, size); | |
728 | if (!virt_addr) | |
729 | return AE_BAD_ADDRESS; | |
730 | unmap = true; | |
731 | } | |
732 | ||
733 | switch (width) { | |
734 | case 8: | |
735 | writeb(value, virt_addr); | |
736 | break; | |
737 | case 16: | |
738 | writew(value, virt_addr); | |
739 | break; | |
740 | case 32: | |
741 | writel(value, virt_addr); | |
742 | break; | |
743 | case 64: | |
3277b4ea | 744 | writeq(value, virt_addr); |
e615bf5b MS |
745 | break; |
746 | default: | |
747 | BUG(); | |
748 | } | |
749 | ||
750 | if (unmap) | |
751 | iounmap(virt_addr); | |
752 | else | |
753 | rcu_read_unlock(); | |
754 | ||
755 | return AE_OK; | |
756 | } | |
757 | ||
bd23fac3 | 758 | #ifdef CONFIG_PCI |
1da177e4 | 759 | acpi_status |
4be44fcd | 760 | acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
c5f0231e | 761 | u64 *value, u32 width) |
1da177e4 LT |
762 | { |
763 | int result, size; | |
c5f0231e | 764 | u32 value32; |
1da177e4 LT |
765 | |
766 | if (!value) | |
767 | return AE_BAD_PARAMETER; | |
768 | ||
769 | switch (width) { | |
770 | case 8: | |
771 | size = 1; | |
772 | break; | |
773 | case 16: | |
774 | size = 2; | |
775 | break; | |
776 | case 32: | |
777 | size = 4; | |
778 | break; | |
779 | default: | |
780 | return AE_ERROR; | |
781 | } | |
782 | ||
b6ce068a MW |
783 | result = raw_pci_read(pci_id->segment, pci_id->bus, |
784 | PCI_DEVFN(pci_id->device, pci_id->function), | |
c5f0231e BM |
785 | reg, size, &value32); |
786 | *value = value32; | |
1da177e4 LT |
787 | |
788 | return (result ? AE_ERROR : AE_OK); | |
789 | } | |
4be44fcd | 790 | |
1da177e4 | 791 | acpi_status |
4be44fcd | 792 | acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
439913ff | 793 | u64 value, u32 width) |
1da177e4 LT |
794 | { |
795 | int result, size; | |
796 | ||
797 | switch (width) { | |
798 | case 8: | |
799 | size = 1; | |
800 | break; | |
801 | case 16: | |
802 | size = 2; | |
803 | break; | |
804 | case 32: | |
805 | size = 4; | |
806 | break; | |
807 | default: | |
808 | return AE_ERROR; | |
809 | } | |
810 | ||
b6ce068a MW |
811 | result = raw_pci_write(pci_id->segment, pci_id->bus, |
812 | PCI_DEVFN(pci_id->device, pci_id->function), | |
813 | reg, size, value); | |
1da177e4 LT |
814 | |
815 | return (result ? AE_ERROR : AE_OK); | |
816 | } | |
bd23fac3 | 817 | #endif |
1da177e4 | 818 | |
65f27f38 | 819 | static void acpi_os_execute_deferred(struct work_struct *work) |
88db5e14 AS |
820 | { |
821 | struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work); | |
88db5e14 | 822 | |
19cd847a ZR |
823 | dpc->function(dpc->context); |
824 | kfree(dpc); | |
19cd847a ZR |
825 | } |
826 | ||
836d0830 LZ |
827 | #ifdef CONFIG_ACPI_DEBUGGER |
828 | static struct acpi_debugger acpi_debugger; | |
829 | static bool acpi_debugger_initialized; | |
830 | ||
831 | int acpi_register_debugger(struct module *owner, | |
832 | const struct acpi_debugger_ops *ops) | |
833 | { | |
834 | int ret = 0; | |
835 | ||
836 | mutex_lock(&acpi_debugger.lock); | |
837 | if (acpi_debugger.ops) { | |
838 | ret = -EBUSY; | |
839 | goto err_lock; | |
840 | } | |
841 | ||
842 | acpi_debugger.owner = owner; | |
843 | acpi_debugger.ops = ops; | |
844 | ||
845 | err_lock: | |
846 | mutex_unlock(&acpi_debugger.lock); | |
847 | return ret; | |
848 | } | |
849 | EXPORT_SYMBOL(acpi_register_debugger); | |
850 | ||
851 | void acpi_unregister_debugger(const struct acpi_debugger_ops *ops) | |
852 | { | |
853 | mutex_lock(&acpi_debugger.lock); | |
854 | if (ops == acpi_debugger.ops) { | |
855 | acpi_debugger.ops = NULL; | |
856 | acpi_debugger.owner = NULL; | |
857 | } | |
858 | mutex_unlock(&acpi_debugger.lock); | |
859 | } | |
860 | EXPORT_SYMBOL(acpi_unregister_debugger); | |
861 | ||
862 | int acpi_debugger_create_thread(acpi_osd_exec_callback function, void *context) | |
863 | { | |
864 | int ret; | |
865 | int (*func)(acpi_osd_exec_callback, void *); | |
866 | struct module *owner; | |
867 | ||
868 | if (!acpi_debugger_initialized) | |
869 | return -ENODEV; | |
870 | mutex_lock(&acpi_debugger.lock); | |
871 | if (!acpi_debugger.ops) { | |
872 | ret = -ENODEV; | |
873 | goto err_lock; | |
874 | } | |
875 | if (!try_module_get(acpi_debugger.owner)) { | |
876 | ret = -ENODEV; | |
877 | goto err_lock; | |
878 | } | |
879 | func = acpi_debugger.ops->create_thread; | |
880 | owner = acpi_debugger.owner; | |
881 | mutex_unlock(&acpi_debugger.lock); | |
882 | ||
883 | ret = func(function, context); | |
884 | ||
885 | mutex_lock(&acpi_debugger.lock); | |
886 | module_put(owner); | |
887 | err_lock: | |
888 | mutex_unlock(&acpi_debugger.lock); | |
889 | return ret; | |
890 | } | |
891 | ||
892 | ssize_t acpi_debugger_write_log(const char *msg) | |
893 | { | |
894 | ssize_t ret; | |
895 | ssize_t (*func)(const char *); | |
896 | struct module *owner; | |
897 | ||
898 | if (!acpi_debugger_initialized) | |
899 | return -ENODEV; | |
900 | mutex_lock(&acpi_debugger.lock); | |
901 | if (!acpi_debugger.ops) { | |
902 | ret = -ENODEV; | |
903 | goto err_lock; | |
904 | } | |
905 | if (!try_module_get(acpi_debugger.owner)) { | |
906 | ret = -ENODEV; | |
907 | goto err_lock; | |
908 | } | |
909 | func = acpi_debugger.ops->write_log; | |
910 | owner = acpi_debugger.owner; | |
911 | mutex_unlock(&acpi_debugger.lock); | |
912 | ||
913 | ret = func(msg); | |
914 | ||
915 | mutex_lock(&acpi_debugger.lock); | |
916 | module_put(owner); | |
917 | err_lock: | |
918 | mutex_unlock(&acpi_debugger.lock); | |
919 | return ret; | |
920 | } | |
921 | ||
922 | ssize_t acpi_debugger_read_cmd(char *buffer, size_t buffer_length) | |
923 | { | |
924 | ssize_t ret; | |
925 | ssize_t (*func)(char *, size_t); | |
926 | struct module *owner; | |
927 | ||
928 | if (!acpi_debugger_initialized) | |
929 | return -ENODEV; | |
930 | mutex_lock(&acpi_debugger.lock); | |
931 | if (!acpi_debugger.ops) { | |
932 | ret = -ENODEV; | |
933 | goto err_lock; | |
934 | } | |
935 | if (!try_module_get(acpi_debugger.owner)) { | |
936 | ret = -ENODEV; | |
937 | goto err_lock; | |
938 | } | |
939 | func = acpi_debugger.ops->read_cmd; | |
940 | owner = acpi_debugger.owner; | |
941 | mutex_unlock(&acpi_debugger.lock); | |
942 | ||
943 | ret = func(buffer, buffer_length); | |
944 | ||
945 | mutex_lock(&acpi_debugger.lock); | |
946 | module_put(owner); | |
947 | err_lock: | |
948 | mutex_unlock(&acpi_debugger.lock); | |
949 | return ret; | |
950 | } | |
951 | ||
952 | int acpi_debugger_wait_command_ready(void) | |
953 | { | |
954 | int ret; | |
955 | int (*func)(bool, char *, size_t); | |
956 | struct module *owner; | |
957 | ||
958 | if (!acpi_debugger_initialized) | |
959 | return -ENODEV; | |
960 | mutex_lock(&acpi_debugger.lock); | |
961 | if (!acpi_debugger.ops) { | |
962 | ret = -ENODEV; | |
963 | goto err_lock; | |
964 | } | |
965 | if (!try_module_get(acpi_debugger.owner)) { | |
966 | ret = -ENODEV; | |
967 | goto err_lock; | |
968 | } | |
969 | func = acpi_debugger.ops->wait_command_ready; | |
970 | owner = acpi_debugger.owner; | |
971 | mutex_unlock(&acpi_debugger.lock); | |
972 | ||
973 | ret = func(acpi_gbl_method_executing, | |
974 | acpi_gbl_db_line_buf, ACPI_DB_LINE_BUFFER_SIZE); | |
975 | ||
976 | mutex_lock(&acpi_debugger.lock); | |
977 | module_put(owner); | |
978 | err_lock: | |
979 | mutex_unlock(&acpi_debugger.lock); | |
980 | return ret; | |
981 | } | |
982 | ||
983 | int acpi_debugger_notify_command_complete(void) | |
984 | { | |
985 | int ret; | |
986 | int (*func)(void); | |
987 | struct module *owner; | |
988 | ||
989 | if (!acpi_debugger_initialized) | |
990 | return -ENODEV; | |
991 | mutex_lock(&acpi_debugger.lock); | |
992 | if (!acpi_debugger.ops) { | |
993 | ret = -ENODEV; | |
994 | goto err_lock; | |
995 | } | |
996 | if (!try_module_get(acpi_debugger.owner)) { | |
997 | ret = -ENODEV; | |
998 | goto err_lock; | |
999 | } | |
1000 | func = acpi_debugger.ops->notify_command_complete; | |
1001 | owner = acpi_debugger.owner; | |
1002 | mutex_unlock(&acpi_debugger.lock); | |
1003 | ||
1004 | ret = func(); | |
1005 | ||
1006 | mutex_lock(&acpi_debugger.lock); | |
1007 | module_put(owner); | |
1008 | err_lock: | |
1009 | mutex_unlock(&acpi_debugger.lock); | |
1010 | return ret; | |
1011 | } | |
1012 | ||
1013 | int __init acpi_debugger_init(void) | |
1014 | { | |
1015 | mutex_init(&acpi_debugger.lock); | |
1016 | acpi_debugger_initialized = true; | |
1017 | return 0; | |
1018 | } | |
1019 | #endif | |
1020 | ||
b8d35192 AS |
1021 | /******************************************************************************* |
1022 | * | |
1023 | * FUNCTION: acpi_os_execute | |
1024 | * | |
1025 | * PARAMETERS: Type - Type of the callback | |
1026 | * Function - Function to be executed | |
1027 | * Context - Function parameters | |
1028 | * | |
1029 | * RETURN: Status | |
1030 | * | |
1031 | * DESCRIPTION: Depending on type, either queues function for deferred execution or | |
1032 | * immediately executes function on a separate thread. | |
1033 | * | |
1034 | ******************************************************************************/ | |
1035 | ||
7b98118a RW |
1036 | acpi_status acpi_os_execute(acpi_execute_type type, |
1037 | acpi_osd_exec_callback function, void *context) | |
1da177e4 | 1038 | { |
4be44fcd LB |
1039 | acpi_status status = AE_OK; |
1040 | struct acpi_os_dpc *dpc; | |
17bc54ee | 1041 | struct workqueue_struct *queue; |
19cd847a | 1042 | int ret; |
72945b2b LB |
1043 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
1044 | "Scheduling function [%p(%p)] for deferred execution.\n", | |
1045 | function, context)); | |
1da177e4 | 1046 | |
8cfb0cdf | 1047 | if (type == OSL_DEBUGGER_MAIN_THREAD) { |
836d0830 | 1048 | ret = acpi_debugger_create_thread(function, context); |
8cfb0cdf LZ |
1049 | if (ret) { |
1050 | pr_err("Call to kthread_create() failed.\n"); | |
1051 | status = AE_ERROR; | |
1052 | } | |
1053 | goto out_thread; | |
1054 | } | |
1055 | ||
1da177e4 LT |
1056 | /* |
1057 | * Allocate/initialize DPC structure. Note that this memory will be | |
65f27f38 | 1058 | * freed by the callee. The kernel handles the work_struct list in a |
1da177e4 LT |
1059 | * way that allows us to also free its memory inside the callee. |
1060 | * Because we may want to schedule several tasks with different | |
1061 | * parameters we can't use the approach some kernel code uses of | |
65f27f38 | 1062 | * having a static work_struct. |
1da177e4 | 1063 | */ |
72945b2b | 1064 | |
3ae45a27 | 1065 | dpc = kzalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC); |
1da177e4 | 1066 | if (!dpc) |
889c78be | 1067 | return AE_NO_MEMORY; |
b976fe19 | 1068 | |
1da177e4 LT |
1069 | dpc->function = function; |
1070 | dpc->context = context; | |
b976fe19 | 1071 | |
c02256be | 1072 | /* |
3ae45a27 RW |
1073 | * To prevent lockdep from complaining unnecessarily, make sure that |
1074 | * there is a different static lockdep key for each workqueue by using | |
1075 | * INIT_WORK() for each of them separately. | |
c02256be | 1076 | */ |
7b98118a | 1077 | if (type == OSL_NOTIFY_HANDLER) { |
3ae45a27 | 1078 | queue = kacpi_notify_wq; |
bc73675b | 1079 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); |
8cfb0cdf | 1080 | } else if (type == OSL_GPE_HANDLER) { |
3ae45a27 | 1081 | queue = kacpid_wq; |
bc73675b | 1082 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); |
8cfb0cdf LZ |
1083 | } else { |
1084 | pr_err("Unsupported os_execute type %d.\n", type); | |
1085 | status = AE_ERROR; | |
3ae45a27 | 1086 | } |
bc73675b | 1087 | |
8cfb0cdf LZ |
1088 | if (ACPI_FAILURE(status)) |
1089 | goto err_workqueue; | |
1090 | ||
8fec62b2 TH |
1091 | /* |
1092 | * On some machines, a software-initiated SMI causes corruption unless | |
1093 | * the SMI runs on CPU 0. An SMI can be initiated by any AML, but | |
1094 | * typically it's done in GPE-related methods that are run via | |
1095 | * workqueues, so we can avoid the known corruption cases by always | |
1096 | * queueing on CPU 0. | |
1097 | */ | |
1098 | ret = queue_work_on(0, queue, &dpc->work); | |
19cd847a | 1099 | if (!ret) { |
55ac9a01 LM |
1100 | printk(KERN_ERR PREFIX |
1101 | "Call to queue_work() failed.\n"); | |
17bc54ee | 1102 | status = AE_ERROR; |
1da177e4 | 1103 | } |
8cfb0cdf LZ |
1104 | err_workqueue: |
1105 | if (ACPI_FAILURE(status)) | |
1106 | kfree(dpc); | |
1107 | out_thread: | |
889c78be | 1108 | return status; |
1da177e4 | 1109 | } |
7b98118a | 1110 | EXPORT_SYMBOL(acpi_os_execute); |
4be44fcd | 1111 | |
7b98118a | 1112 | void acpi_os_wait_events_complete(void) |
19cd847a | 1113 | { |
90253a79 LZ |
1114 | /* |
1115 | * Make sure the GPE handler or the fixed event handler is not used | |
1116 | * on another CPU after removal. | |
1117 | */ | |
efb1cf7d CY |
1118 | if (acpi_sci_irq_valid()) |
1119 | synchronize_hardirq(acpi_sci_irq); | |
7b98118a RW |
1120 | flush_workqueue(kacpid_wq); |
1121 | flush_workqueue(kacpi_notify_wq); | |
19cd847a | 1122 | } |
757c968c | 1123 | EXPORT_SYMBOL(acpi_os_wait_events_complete); |
1da177e4 | 1124 | |
7b98118a RW |
1125 | struct acpi_hp_work { |
1126 | struct work_struct work; | |
1e3bcb59 | 1127 | struct acpi_device *adev; |
7b98118a RW |
1128 | u32 src; |
1129 | }; | |
1130 | ||
1131 | static void acpi_hotplug_work_fn(struct work_struct *work) | |
19cd847a | 1132 | { |
7b98118a RW |
1133 | struct acpi_hp_work *hpw = container_of(work, struct acpi_hp_work, work); |
1134 | ||
1135 | acpi_os_wait_events_complete(); | |
1e3bcb59 | 1136 | acpi_device_hotplug(hpw->adev, hpw->src); |
7b98118a | 1137 | kfree(hpw); |
19cd847a ZR |
1138 | } |
1139 | ||
1e3bcb59 | 1140 | acpi_status acpi_hotplug_schedule(struct acpi_device *adev, u32 src) |
1da177e4 | 1141 | { |
7b98118a RW |
1142 | struct acpi_hp_work *hpw; |
1143 | ||
1144 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, | |
1e3bcb59 RW |
1145 | "Scheduling hotplug event (%p, %u) for deferred execution.\n", |
1146 | adev, src)); | |
7b98118a RW |
1147 | |
1148 | hpw = kmalloc(sizeof(*hpw), GFP_KERNEL); | |
1149 | if (!hpw) | |
1150 | return AE_NO_MEMORY; | |
1151 | ||
1152 | INIT_WORK(&hpw->work, acpi_hotplug_work_fn); | |
1e3bcb59 | 1153 | hpw->adev = adev; |
7b98118a RW |
1154 | hpw->src = src; |
1155 | /* | |
1156 | * We can't run hotplug code in kacpid_wq/kacpid_notify_wq etc., because | |
1157 | * the hotplug code may call driver .remove() functions, which may | |
1158 | * invoke flush_scheduled_work()/acpi_os_wait_events_complete() to flush | |
1159 | * these workqueues. | |
1160 | */ | |
1161 | if (!queue_work(kacpi_hotplug_wq, &hpw->work)) { | |
1162 | kfree(hpw); | |
1163 | return AE_ERROR; | |
1164 | } | |
1165 | return AE_OK; | |
1da177e4 | 1166 | } |
4be44fcd | 1167 | |
d783156e RW |
1168 | bool acpi_queue_hotplug_work(struct work_struct *work) |
1169 | { | |
1170 | return queue_work(kacpi_hotplug_wq, work); | |
1171 | } | |
1da177e4 | 1172 | |
1da177e4 | 1173 | acpi_status |
4be44fcd | 1174 | acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle) |
1da177e4 | 1175 | { |
4be44fcd | 1176 | struct semaphore *sem = NULL; |
1da177e4 | 1177 | |
2d0acb4a | 1178 | sem = acpi_os_allocate_zeroed(sizeof(struct semaphore)); |
1da177e4 | 1179 | if (!sem) |
d550d98d | 1180 | return AE_NO_MEMORY; |
1da177e4 LT |
1181 | |
1182 | sema_init(sem, initial_units); | |
1183 | ||
4be44fcd | 1184 | *handle = (acpi_handle *) sem; |
1da177e4 | 1185 | |
4be44fcd LB |
1186 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n", |
1187 | *handle, initial_units)); | |
1da177e4 | 1188 | |
d550d98d | 1189 | return AE_OK; |
1da177e4 | 1190 | } |
1da177e4 | 1191 | |
1da177e4 LT |
1192 | /* |
1193 | * TODO: A better way to delete semaphores? Linux doesn't have a | |
1194 | * 'delete_semaphore()' function -- may result in an invalid | |
1195 | * pointer dereference for non-synchronized consumers. Should | |
1196 | * we at least check for blocked threads and signal/cancel them? | |
1197 | */ | |
1198 | ||
4be44fcd | 1199 | acpi_status acpi_os_delete_semaphore(acpi_handle handle) |
1da177e4 | 1200 | { |
4be44fcd | 1201 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 1202 | |
1da177e4 | 1203 | if (!sem) |
d550d98d | 1204 | return AE_BAD_PARAMETER; |
1da177e4 | 1205 | |
4be44fcd | 1206 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle)); |
1da177e4 | 1207 | |
f1241c87 | 1208 | BUG_ON(!list_empty(&sem->wait_list)); |
02438d87 | 1209 | kfree(sem); |
4be44fcd | 1210 | sem = NULL; |
1da177e4 | 1211 | |
d550d98d | 1212 | return AE_OK; |
1da177e4 | 1213 | } |
1da177e4 | 1214 | |
1da177e4 | 1215 | /* |
1da177e4 LT |
1216 | * TODO: Support for units > 1? |
1217 | */ | |
4be44fcd | 1218 | acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout) |
1da177e4 | 1219 | { |
4be44fcd LB |
1220 | acpi_status status = AE_OK; |
1221 | struct semaphore *sem = (struct semaphore *)handle; | |
f1241c87 | 1222 | long jiffies; |
4be44fcd | 1223 | int ret = 0; |
1da177e4 | 1224 | |
7901a052 LZ |
1225 | if (!acpi_os_initialized) |
1226 | return AE_OK; | |
1227 | ||
1da177e4 | 1228 | if (!sem || (units < 1)) |
d550d98d | 1229 | return AE_BAD_PARAMETER; |
1da177e4 LT |
1230 | |
1231 | if (units > 1) | |
d550d98d | 1232 | return AE_SUPPORT; |
1da177e4 | 1233 | |
4be44fcd LB |
1234 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n", |
1235 | handle, units, timeout)); | |
1da177e4 | 1236 | |
f1241c87 MW |
1237 | if (timeout == ACPI_WAIT_FOREVER) |
1238 | jiffies = MAX_SCHEDULE_TIMEOUT; | |
1239 | else | |
1240 | jiffies = msecs_to_jiffies(timeout); | |
cad1525a | 1241 | |
f1241c87 MW |
1242 | ret = down_timeout(sem, jiffies); |
1243 | if (ret) | |
1244 | status = AE_TIME; | |
1da177e4 LT |
1245 | |
1246 | if (ACPI_FAILURE(status)) { | |
9e7e2c04 | 1247 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, |
a6fc6720 | 1248 | "Failed to acquire semaphore[%p|%d|%d], %s", |
4be44fcd LB |
1249 | handle, units, timeout, |
1250 | acpi_format_exception(status))); | |
1251 | } else { | |
1252 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, | |
a6fc6720 | 1253 | "Acquired semaphore[%p|%d|%d]", handle, |
4be44fcd | 1254 | units, timeout)); |
1da177e4 LT |
1255 | } |
1256 | ||
d550d98d | 1257 | return status; |
1da177e4 | 1258 | } |
1da177e4 | 1259 | |
1da177e4 LT |
1260 | /* |
1261 | * TODO: Support for units > 1? | |
1262 | */ | |
4be44fcd | 1263 | acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units) |
1da177e4 | 1264 | { |
4be44fcd | 1265 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 1266 | |
7901a052 LZ |
1267 | if (!acpi_os_initialized) |
1268 | return AE_OK; | |
1269 | ||
1da177e4 | 1270 | if (!sem || (units < 1)) |
d550d98d | 1271 | return AE_BAD_PARAMETER; |
1da177e4 LT |
1272 | |
1273 | if (units > 1) | |
d550d98d | 1274 | return AE_SUPPORT; |
1da177e4 | 1275 | |
4be44fcd LB |
1276 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle, |
1277 | units)); | |
1da177e4 LT |
1278 | |
1279 | up(sem); | |
1280 | ||
d550d98d | 1281 | return AE_OK; |
1da177e4 | 1282 | } |
4be44fcd | 1283 | |
4d946f79 | 1284 | acpi_status acpi_os_get_line(char *buffer, u32 buffer_length, u32 *bytes_read) |
1da177e4 | 1285 | { |
1da177e4 LT |
1286 | #ifdef ENABLE_DEBUGGER |
1287 | if (acpi_in_debugger) { | |
1288 | u32 chars; | |
1289 | ||
4d946f79 | 1290 | kdb_read(buffer, buffer_length); |
1da177e4 LT |
1291 | |
1292 | /* remove the CR kdb includes */ | |
1293 | chars = strlen(buffer) - 1; | |
1294 | buffer[chars] = '\0'; | |
1295 | } | |
8cfb0cdf LZ |
1296 | #else |
1297 | int ret; | |
1298 | ||
836d0830 | 1299 | ret = acpi_debugger_read_cmd(buffer, buffer_length); |
8cfb0cdf LZ |
1300 | if (ret < 0) |
1301 | return AE_ERROR; | |
1302 | if (bytes_read) | |
1303 | *bytes_read = ret; | |
1da177e4 LT |
1304 | #endif |
1305 | ||
4d946f79 | 1306 | return AE_OK; |
1da177e4 | 1307 | } |
836d0830 | 1308 | EXPORT_SYMBOL(acpi_os_get_line); |
1da177e4 | 1309 | |
8cfb0cdf LZ |
1310 | acpi_status acpi_os_wait_command_ready(void) |
1311 | { | |
1312 | int ret; | |
1313 | ||
836d0830 | 1314 | ret = acpi_debugger_wait_command_ready(); |
8cfb0cdf LZ |
1315 | if (ret < 0) |
1316 | return AE_ERROR; | |
1317 | return AE_OK; | |
1318 | } | |
1319 | ||
1320 | acpi_status acpi_os_notify_command_complete(void) | |
1321 | { | |
1322 | int ret; | |
1323 | ||
836d0830 | 1324 | ret = acpi_debugger_notify_command_complete(); |
8cfb0cdf LZ |
1325 | if (ret < 0) |
1326 | return AE_ERROR; | |
1327 | return AE_OK; | |
1328 | } | |
1329 | ||
4be44fcd | 1330 | acpi_status acpi_os_signal(u32 function, void *info) |
1da177e4 | 1331 | { |
4be44fcd | 1332 | switch (function) { |
1da177e4 LT |
1333 | case ACPI_SIGNAL_FATAL: |
1334 | printk(KERN_ERR PREFIX "Fatal opcode executed\n"); | |
1335 | break; | |
1336 | case ACPI_SIGNAL_BREAKPOINT: | |
1337 | /* | |
1338 | * AML Breakpoint | |
1339 | * ACPI spec. says to treat it as a NOP unless | |
1340 | * you are debugging. So if/when we integrate | |
1341 | * AML debugger into the kernel debugger its | |
1342 | * hook will go here. But until then it is | |
1343 | * not useful to print anything on breakpoints. | |
1344 | */ | |
1345 | break; | |
1346 | default: | |
1347 | break; | |
1348 | } | |
1349 | ||
1350 | return AE_OK; | |
1351 | } | |
4be44fcd | 1352 | |
4be44fcd | 1353 | static int __init acpi_os_name_setup(char *str) |
1da177e4 LT |
1354 | { |
1355 | char *p = acpi_os_name; | |
4be44fcd | 1356 | int count = ACPI_MAX_OVERRIDE_LEN - 1; |
1da177e4 LT |
1357 | |
1358 | if (!str || !*str) | |
1359 | return 0; | |
1360 | ||
5e2be4e0 | 1361 | for (; count-- && *str; str++) { |
1da177e4 LT |
1362 | if (isalnum(*str) || *str == ' ' || *str == ':') |
1363 | *p++ = *str; | |
1364 | else if (*str == '\'' || *str == '"') | |
1365 | continue; | |
1366 | else | |
1367 | break; | |
1368 | } | |
1369 | *p = 0; | |
1370 | ||
1371 | return 1; | |
4be44fcd | 1372 | |
1da177e4 LT |
1373 | } |
1374 | ||
1375 | __setup("acpi_os_name=", acpi_os_name_setup); | |
1376 | ||
22b5afce | 1377 | /* |
08e1d7c0 | 1378 | * Disable the auto-serialization of named objects creation methods. |
22b5afce | 1379 | * |
08e1d7c0 | 1380 | * This feature is enabled by default. It marks the AML control methods |
22b5afce BM |
1381 | * that contain the opcodes to create named objects as "Serialized". |
1382 | */ | |
08e1d7c0 | 1383 | static int __init acpi_no_auto_serialize_setup(char *str) |
1da177e4 | 1384 | { |
08e1d7c0 LZ |
1385 | acpi_gbl_auto_serialize_methods = FALSE; |
1386 | pr_info("ACPI: auto-serialization disabled\n"); | |
1da177e4 LT |
1387 | |
1388 | return 1; | |
1389 | } | |
1390 | ||
08e1d7c0 | 1391 | __setup("acpi_no_auto_serialize", acpi_no_auto_serialize_setup); |
1da177e4 | 1392 | |
df92e695 TR |
1393 | /* Check of resource interference between native drivers and ACPI |
1394 | * OperationRegions (SystemIO and System Memory only). | |
1395 | * IO ports and memory declared in ACPI might be used by the ACPI subsystem | |
1396 | * in arbitrary AML code and can interfere with legacy drivers. | |
1397 | * acpi_enforce_resources= can be set to: | |
1398 | * | |
7e90560c | 1399 | * - strict (default) (2) |
df92e695 | 1400 | * -> further driver trying to access the resources will not load |
7e90560c | 1401 | * - lax (1) |
df92e695 TR |
1402 | * -> further driver trying to access the resources will load, but you |
1403 | * get a system message that something might go wrong... | |
1404 | * | |
1405 | * - no (0) | |
1406 | * -> ACPI Operation Region resources will not be registered | |
1407 | * | |
1408 | */ | |
1409 | #define ENFORCE_RESOURCES_STRICT 2 | |
1410 | #define ENFORCE_RESOURCES_LAX 1 | |
1411 | #define ENFORCE_RESOURCES_NO 0 | |
1412 | ||
7e90560c | 1413 | static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; |
df92e695 TR |
1414 | |
1415 | static int __init acpi_enforce_resources_setup(char *str) | |
1416 | { | |
1417 | if (str == NULL || *str == '\0') | |
1418 | return 0; | |
1419 | ||
1420 | if (!strcmp("strict", str)) | |
1421 | acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; | |
1422 | else if (!strcmp("lax", str)) | |
1423 | acpi_enforce_resources = ENFORCE_RESOURCES_LAX; | |
1424 | else if (!strcmp("no", str)) | |
1425 | acpi_enforce_resources = ENFORCE_RESOURCES_NO; | |
1426 | ||
1427 | return 1; | |
1428 | } | |
1429 | ||
1430 | __setup("acpi_enforce_resources=", acpi_enforce_resources_setup); | |
1431 | ||
1432 | /* Check for resource conflicts between ACPI OperationRegions and native | |
1433 | * drivers */ | |
876fba43 | 1434 | int acpi_check_resource_conflict(const struct resource *res) |
df92e695 | 1435 | { |
f654c0fe LM |
1436 | acpi_adr_space_type space_id; |
1437 | acpi_size length; | |
1438 | u8 warn = 0; | |
1439 | int clash = 0; | |
df92e695 TR |
1440 | |
1441 | if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) | |
1442 | return 0; | |
1443 | if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM)) | |
1444 | return 0; | |
1445 | ||
f654c0fe LM |
1446 | if (res->flags & IORESOURCE_IO) |
1447 | space_id = ACPI_ADR_SPACE_SYSTEM_IO; | |
1448 | else | |
1449 | space_id = ACPI_ADR_SPACE_SYSTEM_MEMORY; | |
df92e695 | 1450 | |
e4f52244 | 1451 | length = resource_size(res); |
f654c0fe LM |
1452 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) |
1453 | warn = 1; | |
1454 | clash = acpi_check_address_range(space_id, res->start, length, warn); | |
df92e695 TR |
1455 | |
1456 | if (clash) { | |
1457 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) { | |
14f03343 JD |
1458 | if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX) |
1459 | printk(KERN_NOTICE "ACPI: This conflict may" | |
1460 | " cause random problems and system" | |
1461 | " instability\n"); | |
1462 | printk(KERN_INFO "ACPI: If an ACPI driver is available" | |
1463 | " for this device, you should use it instead of" | |
1464 | " the native driver\n"); | |
df92e695 TR |
1465 | } |
1466 | if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT) | |
1467 | return -EBUSY; | |
1468 | } | |
1469 | return 0; | |
1470 | } | |
443dea72 | 1471 | EXPORT_SYMBOL(acpi_check_resource_conflict); |
df92e695 TR |
1472 | |
1473 | int acpi_check_region(resource_size_t start, resource_size_t n, | |
1474 | const char *name) | |
1475 | { | |
1476 | struct resource res = { | |
1477 | .start = start, | |
1478 | .end = start + n - 1, | |
1479 | .name = name, | |
1480 | .flags = IORESOURCE_IO, | |
1481 | }; | |
1482 | ||
1483 | return acpi_check_resource_conflict(&res); | |
1484 | } | |
1485 | EXPORT_SYMBOL(acpi_check_region); | |
1486 | ||
d2d2e3c4 HK |
1487 | static acpi_status acpi_deactivate_mem_region(acpi_handle handle, u32 level, |
1488 | void *_res, void **return_value) | |
1489 | { | |
1490 | struct acpi_mem_space_context **mem_ctx; | |
1491 | union acpi_operand_object *handler_obj; | |
1492 | union acpi_operand_object *region_obj2; | |
1493 | union acpi_operand_object *region_obj; | |
1494 | struct resource *res = _res; | |
1495 | acpi_status status; | |
1496 | ||
1497 | region_obj = acpi_ns_get_attached_object(handle); | |
1498 | if (!region_obj) | |
1499 | return AE_OK; | |
1500 | ||
1501 | handler_obj = region_obj->region.handler; | |
1502 | if (!handler_obj) | |
1503 | return AE_OK; | |
1504 | ||
1505 | if (region_obj->region.space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) | |
1506 | return AE_OK; | |
1507 | ||
1508 | if (!(region_obj->region.flags & AOPOBJ_SETUP_COMPLETE)) | |
1509 | return AE_OK; | |
1510 | ||
1511 | region_obj2 = acpi_ns_get_secondary_object(region_obj); | |
1512 | if (!region_obj2) | |
1513 | return AE_OK; | |
1514 | ||
1515 | mem_ctx = (void *)®ion_obj2->extra.region_context; | |
1516 | ||
1517 | if (!(mem_ctx[0]->address >= res->start && | |
1518 | mem_ctx[0]->address < res->end)) | |
1519 | return AE_OK; | |
1520 | ||
1521 | status = handler_obj->address_space.setup(region_obj, | |
1522 | ACPI_REGION_DEACTIVATE, | |
1523 | NULL, (void **)mem_ctx); | |
1524 | if (ACPI_SUCCESS(status)) | |
1525 | region_obj->region.flags &= ~(AOPOBJ_SETUP_COMPLETE); | |
1526 | ||
1527 | return status; | |
1528 | } | |
1529 | ||
1530 | /** | |
1531 | * acpi_release_memory - Release any mappings done to a memory region | |
1532 | * @handle: Handle to namespace node | |
1533 | * @res: Memory resource | |
1534 | * @level: A level that terminates the search | |
1535 | * | |
1536 | * Walks through @handle and unmaps all SystemMemory Operation Regions that | |
1537 | * overlap with @res and that have already been activated (mapped). | |
1538 | * | |
1539 | * This is a helper that allows drivers to place special requirements on memory | |
1540 | * region that may overlap with operation regions, primarily allowing them to | |
1541 | * safely map the region as non-cached memory. | |
1542 | * | |
1543 | * The unmapped Operation Regions will be automatically remapped next time they | |
1544 | * are called, so the drivers do not need to do anything else. | |
1545 | */ | |
1546 | acpi_status acpi_release_memory(acpi_handle handle, struct resource *res, | |
1547 | u32 level) | |
1548 | { | |
1549 | if (!(res->flags & IORESOURCE_MEM)) | |
1550 | return AE_TYPE; | |
1551 | ||
1552 | return acpi_walk_namespace(ACPI_TYPE_REGION, handle, level, | |
1553 | acpi_deactivate_mem_region, NULL, res, NULL); | |
1554 | } | |
1555 | EXPORT_SYMBOL_GPL(acpi_release_memory); | |
1556 | ||
70dd6bea JD |
1557 | /* |
1558 | * Let drivers know whether the resource checks are effective | |
1559 | */ | |
1560 | int acpi_resources_are_enforced(void) | |
1561 | { | |
1562 | return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT; | |
1563 | } | |
1564 | EXPORT_SYMBOL(acpi_resources_are_enforced); | |
1565 | ||
9f63b88b LM |
1566 | /* |
1567 | * Deallocate the memory for a spinlock. | |
1568 | */ | |
1569 | void acpi_os_delete_lock(acpi_spinlock handle) | |
1570 | { | |
1571 | ACPI_FREE(handle); | |
1572 | } | |
1573 | ||
73459f73 RM |
1574 | /* |
1575 | * Acquire a spinlock. | |
1576 | * | |
1577 | * handle is a pointer to the spinlock_t. | |
73459f73 RM |
1578 | */ |
1579 | ||
967440e3 | 1580 | acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp) |
73459f73 | 1581 | { |
b8e4d893 | 1582 | acpi_cpu_flags flags; |
967440e3 | 1583 | spin_lock_irqsave(lockp, flags); |
73459f73 RM |
1584 | return flags; |
1585 | } | |
1586 | ||
1587 | /* | |
1588 | * Release a spinlock. See above. | |
1589 | */ | |
1590 | ||
967440e3 | 1591 | void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags) |
73459f73 | 1592 | { |
967440e3 | 1593 | spin_unlock_irqrestore(lockp, flags); |
73459f73 RM |
1594 | } |
1595 | ||
73459f73 RM |
1596 | #ifndef ACPI_USE_LOCAL_CACHE |
1597 | ||
1598 | /******************************************************************************* | |
1599 | * | |
1600 | * FUNCTION: acpi_os_create_cache | |
1601 | * | |
b229cf92 BM |
1602 | * PARAMETERS: name - Ascii name for the cache |
1603 | * size - Size of each cached object | |
1604 | * depth - Maximum depth of the cache (in objects) <ignored> | |
1605 | * cache - Where the new cache object is returned | |
73459f73 | 1606 | * |
b229cf92 | 1607 | * RETURN: status |
73459f73 RM |
1608 | * |
1609 | * DESCRIPTION: Create a cache object | |
1610 | * | |
1611 | ******************************************************************************/ | |
1612 | ||
1613 | acpi_status | |
4be44fcd | 1614 | acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache) |
73459f73 | 1615 | { |
20c2df83 | 1616 | *cache = kmem_cache_create(name, size, 0, 0, NULL); |
a6fdbf90 | 1617 | if (*cache == NULL) |
b229cf92 BM |
1618 | return AE_ERROR; |
1619 | else | |
1620 | return AE_OK; | |
73459f73 RM |
1621 | } |
1622 | ||
1623 | /******************************************************************************* | |
1624 | * | |
1625 | * FUNCTION: acpi_os_purge_cache | |
1626 | * | |
1627 | * PARAMETERS: Cache - Handle to cache object | |
1628 | * | |
1629 | * RETURN: Status | |
1630 | * | |
1631 | * DESCRIPTION: Free all objects within the requested cache. | |
1632 | * | |
1633 | ******************************************************************************/ | |
1634 | ||
4be44fcd | 1635 | acpi_status acpi_os_purge_cache(acpi_cache_t * cache) |
73459f73 | 1636 | { |
50dd0969 | 1637 | kmem_cache_shrink(cache); |
4be44fcd | 1638 | return (AE_OK); |
73459f73 RM |
1639 | } |
1640 | ||
1641 | /******************************************************************************* | |
1642 | * | |
1643 | * FUNCTION: acpi_os_delete_cache | |
1644 | * | |
1645 | * PARAMETERS: Cache - Handle to cache object | |
1646 | * | |
1647 | * RETURN: Status | |
1648 | * | |
1649 | * DESCRIPTION: Free all objects within the requested cache and delete the | |
1650 | * cache object. | |
1651 | * | |
1652 | ******************************************************************************/ | |
1653 | ||
4be44fcd | 1654 | acpi_status acpi_os_delete_cache(acpi_cache_t * cache) |
73459f73 | 1655 | { |
1a1d92c1 | 1656 | kmem_cache_destroy(cache); |
4be44fcd | 1657 | return (AE_OK); |
73459f73 RM |
1658 | } |
1659 | ||
1660 | /******************************************************************************* | |
1661 | * | |
1662 | * FUNCTION: acpi_os_release_object | |
1663 | * | |
1664 | * PARAMETERS: Cache - Handle to cache object | |
1665 | * Object - The object to be released | |
1666 | * | |
1667 | * RETURN: None | |
1668 | * | |
1669 | * DESCRIPTION: Release an object to the specified cache. If cache is full, | |
1670 | * the object is deleted. | |
1671 | * | |
1672 | ******************************************************************************/ | |
1673 | ||
4be44fcd | 1674 | acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object) |
73459f73 | 1675 | { |
4be44fcd LB |
1676 | kmem_cache_free(cache, object); |
1677 | return (AE_OK); | |
73459f73 | 1678 | } |
73459f73 | 1679 | #endif |
d362edaf | 1680 | |
a94e88cd | 1681 | static int __init acpi_no_static_ssdt_setup(char *s) |
b75dd297 | 1682 | { |
a94e88cd LZ |
1683 | acpi_gbl_disable_ssdt_table_install = TRUE; |
1684 | pr_info("ACPI: static SSDT installation disabled\n"); | |
b75dd297 | 1685 | |
a94e88cd | 1686 | return 0; |
b75dd297 LZ |
1687 | } |
1688 | ||
a94e88cd | 1689 | early_param("acpi_no_static_ssdt", acpi_no_static_ssdt_setup); |
b75dd297 | 1690 | |
4dde507f LZ |
1691 | static int __init acpi_disable_return_repair(char *s) |
1692 | { | |
1693 | printk(KERN_NOTICE PREFIX | |
1694 | "ACPI: Predefined validation mechanism disabled\n"); | |
1695 | acpi_gbl_disable_auto_repair = TRUE; | |
1696 | ||
1697 | return 1; | |
1698 | } | |
1699 | ||
1700 | __setup("acpica_no_return_repair", acpi_disable_return_repair); | |
1701 | ||
d362edaf MS |
1702 | acpi_status __init acpi_os_initialize(void) |
1703 | { | |
1704 | acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block); | |
1705 | acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block); | |
1706 | acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block); | |
1707 | acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block); | |
a4714a89 RW |
1708 | if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) { |
1709 | /* | |
1710 | * Use acpi_os_map_generic_address to pre-map the reset | |
1711 | * register if it's in system memory. | |
1712 | */ | |
1713 | int rv; | |
1714 | ||
1715 | rv = acpi_os_map_generic_address(&acpi_gbl_FADT.reset_register); | |
1716 | pr_debug(PREFIX "%s: map reset_reg status %d\n", __func__, rv); | |
1717 | } | |
7901a052 | 1718 | acpi_os_initialized = true; |
d362edaf MS |
1719 | |
1720 | return AE_OK; | |
1721 | } | |
1722 | ||
32d47eef | 1723 | acpi_status __init acpi_os_initialize1(void) |
d362edaf | 1724 | { |
44d2588e TH |
1725 | kacpid_wq = alloc_workqueue("kacpid", 0, 1); |
1726 | kacpi_notify_wq = alloc_workqueue("kacpi_notify", 0, 1); | |
d783156e | 1727 | kacpi_hotplug_wq = alloc_ordered_workqueue("kacpi_hotplug", 0); |
d362edaf MS |
1728 | BUG_ON(!kacpid_wq); |
1729 | BUG_ON(!kacpi_notify_wq); | |
1730 | BUG_ON(!kacpi_hotplug_wq); | |
e5f660eb | 1731 | acpi_osi_init(); |
d362edaf MS |
1732 | return AE_OK; |
1733 | } | |
1734 | ||
1735 | acpi_status acpi_os_terminate(void) | |
1736 | { | |
1737 | if (acpi_irq_handler) { | |
23fe3630 | 1738 | acpi_os_remove_interrupt_handler(acpi_gbl_FADT.sci_interrupt, |
d362edaf MS |
1739 | acpi_irq_handler); |
1740 | } | |
1741 | ||
1742 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe1_block); | |
1743 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block); | |
1744 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block); | |
1745 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block); | |
a4714a89 RW |
1746 | if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) |
1747 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.reset_register); | |
d362edaf MS |
1748 | |
1749 | destroy_workqueue(kacpid_wq); | |
1750 | destroy_workqueue(kacpi_notify_wq); | |
1751 | destroy_workqueue(kacpi_hotplug_wq); | |
1752 | ||
1753 | return AE_OK; | |
1754 | } | |
09f98a82 TL |
1755 | |
1756 | acpi_status acpi_os_prepare_sleep(u8 sleep_state, u32 pm1a_control, | |
1757 | u32 pm1b_control) | |
1758 | { | |
1759 | int rc = 0; | |
1760 | if (__acpi_os_prepare_sleep) | |
1761 | rc = __acpi_os_prepare_sleep(sleep_state, | |
1762 | pm1a_control, pm1b_control); | |
1763 | if (rc < 0) | |
1764 | return AE_ERROR; | |
1765 | else if (rc > 0) | |
0fc5e8f4 | 1766 | return AE_CTRL_TERMINATE; |
09f98a82 TL |
1767 | |
1768 | return AE_OK; | |
1769 | } | |
1770 | ||
1771 | void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state, | |
1772 | u32 pm1a_ctrl, u32 pm1b_ctrl)) | |
1773 | { | |
1774 | __acpi_os_prepare_sleep = func; | |
1775 | } | |
92d8aff3 | 1776 | |
0fc5e8f4 | 1777 | #if (ACPI_REDUCED_HARDWARE) |
d6b47b12 BG |
1778 | acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state, u32 val_a, |
1779 | u32 val_b) | |
1780 | { | |
1781 | int rc = 0; | |
1782 | if (__acpi_os_prepare_extended_sleep) | |
1783 | rc = __acpi_os_prepare_extended_sleep(sleep_state, | |
1784 | val_a, val_b); | |
1785 | if (rc < 0) | |
1786 | return AE_ERROR; | |
1787 | else if (rc > 0) | |
0fc5e8f4 | 1788 | return AE_CTRL_TERMINATE; |
d6b47b12 BG |
1789 | |
1790 | return AE_OK; | |
1791 | } | |
0fc5e8f4 LZ |
1792 | #else |
1793 | acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state, u32 val_a, | |
1794 | u32 val_b) | |
1795 | { | |
1796 | return AE_OK; | |
1797 | } | |
1798 | #endif | |
d6b47b12 BG |
1799 | |
1800 | void acpi_os_set_prepare_extended_sleep(int (*func)(u8 sleep_state, | |
1801 | u32 val_a, u32 val_b)) | |
1802 | { | |
1803 | __acpi_os_prepare_extended_sleep = func; | |
1804 | } | |
0fc5e8f4 LZ |
1805 | |
1806 | acpi_status acpi_os_enter_sleep(u8 sleep_state, | |
1807 | u32 reg_a_value, u32 reg_b_value) | |
1808 | { | |
1809 | acpi_status status; | |
1810 | ||
1811 | if (acpi_gbl_reduced_hardware) | |
1812 | status = acpi_os_prepare_extended_sleep(sleep_state, | |
1813 | reg_a_value, | |
1814 | reg_b_value); | |
1815 | else | |
1816 | status = acpi_os_prepare_sleep(sleep_state, | |
1817 | reg_a_value, reg_b_value); | |
1818 | return status; | |
1819 | } |