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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> | |
3277b4ea | 46 | #include <asm-generic/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); | |
69 | ||
70 | extern char line_buf[80]; | |
4be44fcd | 71 | #endif /*ENABLE_DEBUGGER */ |
1da177e4 | 72 | |
09f98a82 TL |
73 | static int (*__acpi_os_prepare_sleep)(u8 sleep_state, u32 pm1a_ctrl, |
74 | u32 pm1b_ctrl); | |
d6b47b12 BG |
75 | static int (*__acpi_os_prepare_extended_sleep)(u8 sleep_state, u32 val_a, |
76 | u32 val_b); | |
09f98a82 | 77 | |
1da177e4 LT |
78 | static acpi_osd_handler acpi_irq_handler; |
79 | static void *acpi_irq_context; | |
80 | static struct workqueue_struct *kacpid_wq; | |
88db5e14 | 81 | static struct workqueue_struct *kacpi_notify_wq; |
92d8aff3 | 82 | static struct workqueue_struct *kacpi_hotplug_wq; |
7901a052 | 83 | static bool acpi_os_initialized; |
49e4b843 | 84 | unsigned int acpi_sci_irq = INVALID_ACPI_IRQ; |
1da177e4 | 85 | |
620242ae MS |
86 | /* |
87 | * This list of permanent mappings is for memory that may be accessed from | |
88 | * interrupt context, where we can't do the ioremap(). | |
89 | */ | |
90 | struct acpi_ioremap { | |
91 | struct list_head list; | |
92 | void __iomem *virt; | |
93 | acpi_physical_address phys; | |
94 | acpi_size size; | |
b7c1fadd | 95 | unsigned long refcount; |
620242ae MS |
96 | }; |
97 | ||
98 | static LIST_HEAD(acpi_ioremaps); | |
7bbb8903 | 99 | static DEFINE_MUTEX(acpi_ioremap_lock); |
620242ae | 100 | |
b0ed7a91 | 101 | static void __init acpi_osi_setup_late(void); |
ae00d812 | 102 | |
d4b7dc49 | 103 | /* |
a6e0887f | 104 | * The story of _OSI(Linux) |
d4b7dc49 | 105 | * |
a6e0887f LB |
106 | * From pre-history through Linux-2.6.22, |
107 | * Linux responded TRUE upon a BIOS OSI(Linux) query. | |
d4b7dc49 | 108 | * |
a6e0887f LB |
109 | * Unfortunately, reference BIOS writers got wind of this |
110 | * and put OSI(Linux) in their example code, quickly exposing | |
111 | * this string as ill-conceived and opening the door to | |
112 | * an un-bounded number of BIOS incompatibilities. | |
d4b7dc49 | 113 | * |
a6e0887f LB |
114 | * For example, OSI(Linux) was used on resume to re-POST a |
115 | * video card on one system, because Linux at that time | |
116 | * could not do a speedy restore in its native driver. | |
117 | * But then upon gaining quick native restore capability, | |
118 | * Linux has no way to tell the BIOS to skip the time-consuming | |
119 | * POST -- putting Linux at a permanent performance disadvantage. | |
120 | * On another system, the BIOS writer used OSI(Linux) | |
121 | * to infer native OS support for IPMI! On other systems, | |
122 | * OSI(Linux) simply got in the way of Linux claiming to | |
123 | * be compatible with other operating systems, exposing | |
124 | * BIOS issues such as skipped device initialization. | |
d4b7dc49 | 125 | * |
a6e0887f LB |
126 | * So "Linux" turned out to be a really poor chose of |
127 | * OSI string, and from Linux-2.6.23 onward we respond FALSE. | |
d4b7dc49 LB |
128 | * |
129 | * BIOS writers should NOT query _OSI(Linux) on future systems. | |
a6e0887f LB |
130 | * Linux will complain on the console when it sees it, and return FALSE. |
131 | * To get Linux to return TRUE for your system will require | |
132 | * a kernel source update to add a DMI entry, | |
133 | * or boot with "acpi_osi=Linux" | |
d4b7dc49 | 134 | */ |
d4b7dc49 | 135 | |
1d15d84e | 136 | static struct osi_linux { |
d4b7dc49 LB |
137 | unsigned int enable:1; |
138 | unsigned int dmi:1; | |
139 | unsigned int cmdline:1; | |
5dc17986 LZ |
140 | unsigned int default_disabling:1; |
141 | } osi_linux = {0, 0, 0, 0}; | |
f507654d | 142 | |
b0ed7a91 LM |
143 | static u32 acpi_osi_handler(acpi_string interface, u32 supported) |
144 | { | |
145 | if (!strcmp("Linux", interface)) { | |
146 | ||
8997621b | 147 | printk_once(KERN_NOTICE FW_BUG PREFIX |
b0ed7a91 LM |
148 | "BIOS _OSI(Linux) query %s%s\n", |
149 | osi_linux.enable ? "honored" : "ignored", | |
150 | osi_linux.cmdline ? " via cmdline" : | |
151 | osi_linux.dmi ? " via DMI" : ""); | |
152 | } | |
153 | ||
7bc5a2ba MG |
154 | if (!strcmp("Darwin", interface)) { |
155 | /* | |
156 | * Apple firmware will behave poorly if it receives positive | |
157 | * answers to "Darwin" and any other OS. Respond positively | |
158 | * to Darwin and then disable all other vendor strings. | |
159 | */ | |
160 | acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS); | |
161 | supported = ACPI_UINT32_MAX; | |
162 | } | |
163 | ||
b0ed7a91 LM |
164 | return supported; |
165 | } | |
166 | ||
bc9ffce2 | 167 | static void __init acpi_request_region (struct acpi_generic_address *gas, |
9a47cdb1 BH |
168 | unsigned int length, char *desc) |
169 | { | |
bc9ffce2 MS |
170 | u64 addr; |
171 | ||
172 | /* Handle possible alignment issues */ | |
173 | memcpy(&addr, &gas->address, sizeof(addr)); | |
174 | if (!addr || !length) | |
9a47cdb1 BH |
175 | return; |
176 | ||
0294112e RW |
177 | /* Resources are never freed */ |
178 | if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_IO) | |
179 | request_region(addr, length, desc); | |
180 | else if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) | |
181 | request_mem_region(addr, length, desc); | |
9a47cdb1 BH |
182 | } |
183 | ||
0294112e | 184 | static int __init acpi_reserve_resources(void) |
9a47cdb1 | 185 | { |
eee3c859 | 186 | acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
187 | "ACPI PM1a_EVT_BLK"); |
188 | ||
eee3c859 | 189 | acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
190 | "ACPI PM1b_EVT_BLK"); |
191 | ||
eee3c859 | 192 | acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
193 | "ACPI PM1a_CNT_BLK"); |
194 | ||
eee3c859 | 195 | acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
196 | "ACPI PM1b_CNT_BLK"); |
197 | ||
eee3c859 LB |
198 | if (acpi_gbl_FADT.pm_timer_length == 4) |
199 | acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR"); | |
9a47cdb1 | 200 | |
eee3c859 | 201 | acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length, |
9a47cdb1 BH |
202 | "ACPI PM2_CNT_BLK"); |
203 | ||
204 | /* Length of GPE blocks must be a non-negative multiple of 2 */ | |
205 | ||
eee3c859 LB |
206 | if (!(acpi_gbl_FADT.gpe0_block_length & 0x1)) |
207 | acpi_request_region(&acpi_gbl_FADT.xgpe0_block, | |
208 | acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK"); | |
9a47cdb1 | 209 | |
eee3c859 LB |
210 | if (!(acpi_gbl_FADT.gpe1_block_length & 0x1)) |
211 | acpi_request_region(&acpi_gbl_FADT.xgpe1_block, | |
212 | acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK"); | |
0294112e RW |
213 | |
214 | return 0; | |
9a47cdb1 | 215 | } |
0294112e | 216 | fs_initcall_sync(acpi_reserve_resources); |
9a47cdb1 | 217 | |
4be44fcd | 218 | void acpi_os_printf(const char *fmt, ...) |
1da177e4 LT |
219 | { |
220 | va_list args; | |
221 | va_start(args, fmt); | |
222 | acpi_os_vprintf(fmt, args); | |
223 | va_end(args); | |
224 | } | |
4be44fcd | 225 | |
4be44fcd | 226 | void acpi_os_vprintf(const char *fmt, va_list args) |
1da177e4 LT |
227 | { |
228 | static char buffer[512]; | |
4be44fcd | 229 | |
1da177e4 LT |
230 | vsprintf(buffer, fmt, args); |
231 | ||
232 | #ifdef ENABLE_DEBUGGER | |
233 | if (acpi_in_debugger) { | |
234 | kdb_printf("%s", buffer); | |
235 | } else { | |
4d939155 | 236 | printk(KERN_CONT "%s", buffer); |
1da177e4 LT |
237 | } |
238 | #else | |
4d939155 | 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 | ||
2fdf0741 | 369 | void __iomem *__init_refok |
a238317c | 370 | acpi_os_map_iomem(acpi_physical_address phys, acpi_size size) |
1da177e4 | 371 | { |
7ffd0443 | 372 | struct acpi_ioremap *map; |
620242ae | 373 | void __iomem *virt; |
2d6d9fd3 RW |
374 | acpi_physical_address pg_off; |
375 | acpi_size pg_sz; | |
620242ae | 376 | |
9f4fd61f BH |
377 | if (phys > ULONG_MAX) { |
378 | printk(KERN_ERR PREFIX "Cannot map memory that high\n"); | |
70c0846e | 379 | return NULL; |
1da177e4 | 380 | } |
620242ae MS |
381 | |
382 | if (!acpi_gbl_permanent_mmap) | |
ad71860a | 383 | return __acpi_map_table((unsigned long)phys, size); |
620242ae | 384 | |
7ffd0443 RW |
385 | mutex_lock(&acpi_ioremap_lock); |
386 | /* Check if there's a suitable mapping already. */ | |
387 | map = acpi_map_lookup(phys, size); | |
388 | if (map) { | |
b7c1fadd | 389 | map->refcount++; |
7ffd0443 RW |
390 | goto out; |
391 | } | |
392 | ||
620242ae | 393 | map = kzalloc(sizeof(*map), GFP_KERNEL); |
7ffd0443 RW |
394 | if (!map) { |
395 | mutex_unlock(&acpi_ioremap_lock); | |
620242ae | 396 | return NULL; |
7ffd0443 | 397 | } |
620242ae | 398 | |
4a3cba5e MS |
399 | pg_off = round_down(phys, PAGE_SIZE); |
400 | pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off; | |
ba242d5b | 401 | virt = acpi_map(pg_off, pg_sz); |
620242ae | 402 | if (!virt) { |
7ffd0443 | 403 | mutex_unlock(&acpi_ioremap_lock); |
620242ae MS |
404 | kfree(map); |
405 | return NULL; | |
406 | } | |
407 | ||
408 | INIT_LIST_HEAD(&map->list); | |
409 | map->virt = virt; | |
4a3cba5e MS |
410 | map->phys = pg_off; |
411 | map->size = pg_sz; | |
b7c1fadd | 412 | map->refcount = 1; |
620242ae | 413 | |
78cdb3ed | 414 | list_add_tail_rcu(&map->list, &acpi_ioremaps); |
620242ae | 415 | |
a238317c | 416 | out: |
7ffd0443 | 417 | mutex_unlock(&acpi_ioremap_lock); |
4a3cba5e | 418 | return map->virt + (phys - map->phys); |
1da177e4 | 419 | } |
a238317c LZ |
420 | EXPORT_SYMBOL_GPL(acpi_os_map_iomem); |
421 | ||
422 | void *__init_refok | |
423 | acpi_os_map_memory(acpi_physical_address phys, acpi_size size) | |
424 | { | |
425 | return (void *)acpi_os_map_iomem(phys, size); | |
426 | } | |
55a82ab3 | 427 | EXPORT_SYMBOL_GPL(acpi_os_map_memory); |
1da177e4 | 428 | |
b7c1fadd | 429 | static void acpi_os_drop_map_ref(struct acpi_ioremap *map) |
4a3cba5e | 430 | { |
b7c1fadd RW |
431 | if (!--map->refcount) |
432 | list_del_rcu(&map->list); | |
4a3cba5e | 433 | } |
4a3cba5e | 434 | |
b7c1fadd | 435 | static void acpi_os_map_cleanup(struct acpi_ioremap *map) |
7fe135dc | 436 | { |
b7c1fadd | 437 | if (!map->refcount) { |
74b51ee1 | 438 | synchronize_rcu_expedited(); |
ba242d5b | 439 | acpi_unmap(map->phys, map->virt); |
b7c1fadd RW |
440 | kfree(map); |
441 | } | |
4a3cba5e MS |
442 | } |
443 | ||
a238317c | 444 | void __ref acpi_os_unmap_iomem(void __iomem *virt, acpi_size size) |
1da177e4 | 445 | { |
620242ae | 446 | struct acpi_ioremap *map; |
620242ae MS |
447 | |
448 | if (!acpi_gbl_permanent_mmap) { | |
7d97277b | 449 | __acpi_unmap_table(virt, size); |
620242ae MS |
450 | return; |
451 | } | |
452 | ||
7bbb8903 | 453 | mutex_lock(&acpi_ioremap_lock); |
620242ae MS |
454 | map = acpi_map_lookup_virt(virt, size); |
455 | if (!map) { | |
7bbb8903 | 456 | mutex_unlock(&acpi_ioremap_lock); |
7fe135dc | 457 | WARN(true, PREFIX "%s: bad address %p\n", __func__, virt); |
620242ae MS |
458 | return; |
459 | } | |
b7c1fadd | 460 | acpi_os_drop_map_ref(map); |
7bbb8903 | 461 | mutex_unlock(&acpi_ioremap_lock); |
620242ae | 462 | |
b7c1fadd | 463 | acpi_os_map_cleanup(map); |
1da177e4 | 464 | } |
a238317c LZ |
465 | EXPORT_SYMBOL_GPL(acpi_os_unmap_iomem); |
466 | ||
467 | void __ref acpi_os_unmap_memory(void *virt, acpi_size size) | |
468 | { | |
469 | return acpi_os_unmap_iomem((void __iomem *)virt, size); | |
470 | } | |
55a82ab3 | 471 | EXPORT_SYMBOL_GPL(acpi_os_unmap_memory); |
1da177e4 | 472 | |
0d3a9cf5 | 473 | void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size) |
7d97277b YL |
474 | { |
475 | if (!acpi_gbl_permanent_mmap) | |
476 | __acpi_unmap_table(virt, size); | |
477 | } | |
478 | ||
6f68c91c | 479 | int acpi_os_map_generic_address(struct acpi_generic_address *gas) |
29718521 | 480 | { |
bc9ffce2 | 481 | u64 addr; |
29718521 MS |
482 | void __iomem *virt; |
483 | ||
bc9ffce2 | 484 | if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) |
29718521 MS |
485 | return 0; |
486 | ||
bc9ffce2 MS |
487 | /* Handle possible alignment issues */ |
488 | memcpy(&addr, &gas->address, sizeof(addr)); | |
489 | if (!addr || !gas->bit_width) | |
29718521 MS |
490 | return -EINVAL; |
491 | ||
a238317c | 492 | virt = acpi_os_map_iomem(addr, gas->bit_width / 8); |
29718521 MS |
493 | if (!virt) |
494 | return -EIO; | |
495 | ||
496 | return 0; | |
497 | } | |
6f68c91c | 498 | EXPORT_SYMBOL(acpi_os_map_generic_address); |
29718521 | 499 | |
6f68c91c | 500 | void acpi_os_unmap_generic_address(struct acpi_generic_address *gas) |
29718521 | 501 | { |
bc9ffce2 | 502 | u64 addr; |
7fe135dc | 503 | struct acpi_ioremap *map; |
29718521 | 504 | |
bc9ffce2 | 505 | if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) |
29718521 MS |
506 | return; |
507 | ||
bc9ffce2 MS |
508 | /* Handle possible alignment issues */ |
509 | memcpy(&addr, &gas->address, sizeof(addr)); | |
510 | if (!addr || !gas->bit_width) | |
29718521 MS |
511 | return; |
512 | ||
7bbb8903 | 513 | mutex_lock(&acpi_ioremap_lock); |
bc9ffce2 | 514 | map = acpi_map_lookup(addr, gas->bit_width / 8); |
7fe135dc RW |
515 | if (!map) { |
516 | mutex_unlock(&acpi_ioremap_lock); | |
517 | return; | |
518 | } | |
b7c1fadd | 519 | acpi_os_drop_map_ref(map); |
7bbb8903 | 520 | mutex_unlock(&acpi_ioremap_lock); |
29718521 | 521 | |
b7c1fadd | 522 | acpi_os_map_cleanup(map); |
29718521 | 523 | } |
6f68c91c | 524 | EXPORT_SYMBOL(acpi_os_unmap_generic_address); |
29718521 | 525 | |
1da177e4 LT |
526 | #ifdef ACPI_FUTURE_USAGE |
527 | acpi_status | |
4be44fcd | 528 | acpi_os_get_physical_address(void *virt, acpi_physical_address * phys) |
1da177e4 | 529 | { |
4be44fcd | 530 | if (!phys || !virt) |
1da177e4 LT |
531 | return AE_BAD_PARAMETER; |
532 | ||
533 | *phys = virt_to_phys(virt); | |
534 | ||
535 | return AE_OK; | |
536 | } | |
537 | #endif | |
538 | ||
18d78b64 RW |
539 | #ifdef CONFIG_ACPI_REV_OVERRIDE_POSSIBLE |
540 | static bool acpi_rev_override; | |
541 | ||
542 | int __init acpi_rev_override_setup(char *str) | |
543 | { | |
544 | acpi_rev_override = true; | |
545 | return 1; | |
546 | } | |
547 | __setup("acpi_rev_override", acpi_rev_override_setup); | |
548 | #else | |
549 | #define acpi_rev_override false | |
550 | #endif | |
551 | ||
1da177e4 LT |
552 | #define ACPI_MAX_OVERRIDE_LEN 100 |
553 | ||
554 | static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN]; | |
555 | ||
556 | acpi_status | |
4be44fcd | 557 | acpi_os_predefined_override(const struct acpi_predefined_names *init_val, |
2bad7e27 | 558 | char **new_val) |
1da177e4 LT |
559 | { |
560 | if (!init_val || !new_val) | |
561 | return AE_BAD_PARAMETER; | |
562 | ||
563 | *new_val = NULL; | |
4be44fcd | 564 | if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) { |
1da177e4 | 565 | printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n", |
4be44fcd | 566 | acpi_os_name); |
1da177e4 LT |
567 | *new_val = acpi_os_name; |
568 | } | |
569 | ||
18d78b64 RW |
570 | if (!memcmp(init_val->name, "_REV", 4) && acpi_rev_override) { |
571 | printk(KERN_INFO PREFIX "Overriding _REV return value to 5\n"); | |
572 | *new_val = (char *)5; | |
573 | } | |
574 | ||
1da177e4 LT |
575 | return AE_OK; |
576 | } | |
577 | ||
53aac44c TR |
578 | #ifdef CONFIG_ACPI_INITRD_TABLE_OVERRIDE |
579 | #include <linux/earlycpio.h> | |
580 | #include <linux/memblock.h> | |
581 | ||
582 | static u64 acpi_tables_addr; | |
583 | static int all_tables_size; | |
584 | ||
585 | /* Copied from acpica/tbutils.c:acpi_tb_checksum() */ | |
66e162b3 | 586 | static u8 __init acpi_table_checksum(u8 *buffer, u32 length) |
53aac44c TR |
587 | { |
588 | u8 sum = 0; | |
589 | u8 *end = buffer + length; | |
590 | ||
591 | while (buffer < end) | |
592 | sum = (u8) (sum + *(buffer++)); | |
593 | return sum; | |
594 | } | |
595 | ||
596 | /* All but ACPI_SIG_RSDP and ACPI_SIG_FACS: */ | |
597 | static const char * const table_sigs[] = { | |
598 | ACPI_SIG_BERT, ACPI_SIG_CPEP, ACPI_SIG_ECDT, ACPI_SIG_EINJ, | |
599 | ACPI_SIG_ERST, ACPI_SIG_HEST, ACPI_SIG_MADT, ACPI_SIG_MSCT, | |
600 | ACPI_SIG_SBST, ACPI_SIG_SLIT, ACPI_SIG_SRAT, ACPI_SIG_ASF, | |
601 | ACPI_SIG_BOOT, ACPI_SIG_DBGP, ACPI_SIG_DMAR, ACPI_SIG_HPET, | |
602 | ACPI_SIG_IBFT, ACPI_SIG_IVRS, ACPI_SIG_MCFG, ACPI_SIG_MCHI, | |
603 | ACPI_SIG_SLIC, ACPI_SIG_SPCR, ACPI_SIG_SPMI, ACPI_SIG_TCPA, | |
604 | ACPI_SIG_UEFI, ACPI_SIG_WAET, ACPI_SIG_WDAT, ACPI_SIG_WDDT, | |
605 | ACPI_SIG_WDRT, ACPI_SIG_DSDT, ACPI_SIG_FADT, ACPI_SIG_PSDT, | |
606 | ACPI_SIG_RSDT, ACPI_SIG_XSDT, ACPI_SIG_SSDT, NULL }; | |
607 | ||
53aac44c TR |
608 | #define ACPI_HEADER_SIZE sizeof(struct acpi_table_header) |
609 | ||
bee7f9c8 YL |
610 | #define ACPI_OVERRIDE_TABLES 64 |
611 | static struct cpio_data __initdata acpi_initrd_files[ACPI_OVERRIDE_TABLES]; | |
612 | ||
613 | #define MAP_CHUNK_SIZE (NR_FIX_BTMAPS << PAGE_SHIFT) | |
53aac44c TR |
614 | |
615 | void __init acpi_initrd_override(void *data, size_t size) | |
616 | { | |
617 | int sig, no, table_nr = 0, total_offset = 0; | |
618 | long offset = 0; | |
619 | struct acpi_table_header *table; | |
620 | char cpio_path[32] = "kernel/firmware/acpi/"; | |
621 | struct cpio_data file; | |
53aac44c TR |
622 | |
623 | if (data == NULL || size == 0) | |
624 | return; | |
625 | ||
626 | for (no = 0; no < ACPI_OVERRIDE_TABLES; no++) { | |
627 | file = find_cpio_data(cpio_path, data, size, &offset); | |
628 | if (!file.data) | |
629 | break; | |
630 | ||
631 | data += offset; | |
632 | size -= offset; | |
633 | ||
7702ae0d TC |
634 | if (file.size < sizeof(struct acpi_table_header)) { |
635 | pr_err("ACPI OVERRIDE: Table smaller than ACPI header [%s%s]\n", | |
636 | cpio_path, file.name); | |
637 | continue; | |
638 | } | |
53aac44c TR |
639 | |
640 | table = file.data; | |
641 | ||
642 | for (sig = 0; table_sigs[sig]; sig++) | |
643 | if (!memcmp(table->signature, table_sigs[sig], 4)) | |
644 | break; | |
645 | ||
7702ae0d TC |
646 | if (!table_sigs[sig]) { |
647 | pr_err("ACPI OVERRIDE: Unknown signature [%s%s]\n", | |
648 | cpio_path, file.name); | |
649 | continue; | |
650 | } | |
651 | if (file.size != table->length) { | |
652 | pr_err("ACPI OVERRIDE: File length does not match table length [%s%s]\n", | |
653 | cpio_path, file.name); | |
654 | continue; | |
655 | } | |
656 | if (acpi_table_checksum(file.data, table->length)) { | |
657 | pr_err("ACPI OVERRIDE: Bad table checksum [%s%s]\n", | |
658 | cpio_path, file.name); | |
659 | continue; | |
660 | } | |
53aac44c TR |
661 | |
662 | pr_info("%4.4s ACPI table found in initrd [%s%s][0x%x]\n", | |
663 | table->signature, cpio_path, file.name, table->length); | |
664 | ||
665 | all_tables_size += table->length; | |
bee7f9c8 YL |
666 | acpi_initrd_files[table_nr].data = file.data; |
667 | acpi_initrd_files[table_nr].size = file.size; | |
53aac44c TR |
668 | table_nr++; |
669 | } | |
670 | if (table_nr == 0) | |
671 | return; | |
672 | ||
673 | acpi_tables_addr = | |
674 | memblock_find_in_range(0, max_low_pfn_mapped << PAGE_SHIFT, | |
675 | all_tables_size, PAGE_SIZE); | |
676 | if (!acpi_tables_addr) { | |
677 | WARN_ON(1); | |
678 | return; | |
679 | } | |
680 | /* | |
681 | * Only calling e820_add_reserve does not work and the | |
682 | * tables are invalid (memory got used) later. | |
683 | * memblock_reserve works as expected and the tables won't get modified. | |
684 | * But it's not enough on X86 because ioremap will | |
685 | * complain later (used by acpi_os_map_memory) that the pages | |
686 | * that should get mapped are not marked "reserved". | |
687 | * Both memblock_reserve and e820_add_region (via arch_reserve_mem_area) | |
688 | * works fine. | |
689 | */ | |
a6432ded | 690 | memblock_reserve(acpi_tables_addr, all_tables_size); |
53aac44c TR |
691 | arch_reserve_mem_area(acpi_tables_addr, all_tables_size); |
692 | ||
bee7f9c8 YL |
693 | /* |
694 | * early_ioremap only can remap 256k one time. If we map all | |
695 | * tables one time, we will hit the limit. Need to map chunks | |
696 | * one by one during copying the same as that in relocate_initrd(). | |
697 | */ | |
53aac44c | 698 | for (no = 0; no < table_nr; no++) { |
bee7f9c8 YL |
699 | unsigned char *src_p = acpi_initrd_files[no].data; |
700 | phys_addr_t size = acpi_initrd_files[no].size; | |
701 | phys_addr_t dest_addr = acpi_tables_addr + total_offset; | |
702 | phys_addr_t slop, clen; | |
703 | char *dest_p; | |
704 | ||
705 | total_offset += size; | |
706 | ||
707 | while (size) { | |
708 | slop = dest_addr & ~PAGE_MASK; | |
709 | clen = size; | |
710 | if (clen > MAP_CHUNK_SIZE - slop) | |
711 | clen = MAP_CHUNK_SIZE - slop; | |
712 | dest_p = early_ioremap(dest_addr & PAGE_MASK, | |
713 | clen + slop); | |
714 | memcpy(dest_p + slop, src_p, clen); | |
715 | early_iounmap(dest_p, clen + slop); | |
716 | src_p += clen; | |
717 | dest_addr += clen; | |
718 | size -= clen; | |
719 | } | |
53aac44c | 720 | } |
53aac44c TR |
721 | } |
722 | #endif /* CONFIG_ACPI_INITRD_TABLE_OVERRIDE */ | |
723 | ||
325a8d36 TR |
724 | static void acpi_table_taint(struct acpi_table_header *table) |
725 | { | |
726 | pr_warn(PREFIX | |
727 | "Override [%4.4s-%8.8s], this is unsafe: tainting kernel\n", | |
728 | table->signature, table->oem_table_id); | |
373d4d09 | 729 | add_taint(TAINT_OVERRIDDEN_ACPI_TABLE, LOCKDEP_NOW_UNRELIABLE); |
325a8d36 TR |
730 | } |
731 | ||
732 | ||
1da177e4 | 733 | acpi_status |
4be44fcd LB |
734 | acpi_os_table_override(struct acpi_table_header * existing_table, |
735 | struct acpi_table_header ** new_table) | |
1da177e4 LT |
736 | { |
737 | if (!existing_table || !new_table) | |
738 | return AE_BAD_PARAMETER; | |
739 | ||
71fc47a9 MG |
740 | *new_table = NULL; |
741 | ||
1da177e4 LT |
742 | #ifdef CONFIG_ACPI_CUSTOM_DSDT |
743 | if (strncmp(existing_table->signature, "DSDT", 4) == 0) | |
4be44fcd | 744 | *new_table = (struct acpi_table_header *)AmlCode; |
1da177e4 | 745 | #endif |
325a8d36 TR |
746 | if (*new_table != NULL) |
747 | acpi_table_taint(existing_table); | |
1da177e4 LT |
748 | return AE_OK; |
749 | } | |
750 | ||
f7b004a1 BM |
751 | acpi_status |
752 | acpi_os_physical_table_override(struct acpi_table_header *existing_table, | |
b2a35003 TR |
753 | acpi_physical_address *address, |
754 | u32 *table_length) | |
f7b004a1 | 755 | { |
b2a35003 TR |
756 | #ifndef CONFIG_ACPI_INITRD_TABLE_OVERRIDE |
757 | *table_length = 0; | |
758 | *address = 0; | |
759 | return AE_OK; | |
760 | #else | |
761 | int table_offset = 0; | |
762 | struct acpi_table_header *table; | |
763 | ||
764 | *table_length = 0; | |
765 | *address = 0; | |
766 | ||
767 | if (!acpi_tables_addr) | |
768 | return AE_OK; | |
769 | ||
770 | do { | |
771 | if (table_offset + ACPI_HEADER_SIZE > all_tables_size) { | |
772 | WARN_ON(1); | |
773 | return AE_OK; | |
774 | } | |
775 | ||
776 | table = acpi_os_map_memory(acpi_tables_addr + table_offset, | |
777 | ACPI_HEADER_SIZE); | |
f7b004a1 | 778 | |
b2a35003 TR |
779 | if (table_offset + table->length > all_tables_size) { |
780 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
781 | WARN_ON(1); | |
782 | return AE_OK; | |
783 | } | |
784 | ||
785 | table_offset += table->length; | |
786 | ||
787 | if (memcmp(existing_table->signature, table->signature, 4)) { | |
788 | acpi_os_unmap_memory(table, | |
789 | ACPI_HEADER_SIZE); | |
790 | continue; | |
791 | } | |
792 | ||
793 | /* Only override tables with matching oem id */ | |
794 | if (memcmp(table->oem_table_id, existing_table->oem_table_id, | |
795 | ACPI_OEM_TABLE_ID_SIZE)) { | |
796 | acpi_os_unmap_memory(table, | |
797 | ACPI_HEADER_SIZE); | |
798 | continue; | |
799 | } | |
800 | ||
801 | table_offset -= table->length; | |
802 | *table_length = table->length; | |
803 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
804 | *address = acpi_tables_addr + table_offset; | |
805 | break; | |
806 | } while (table_offset + ACPI_HEADER_SIZE < all_tables_size); | |
f7b004a1 | 807 | |
325a8d36 TR |
808 | if (*address != 0) |
809 | acpi_table_taint(existing_table); | |
b2a35003 TR |
810 | return AE_OK; |
811 | #endif | |
812 | } | |
f7b004a1 | 813 | |
7d12e780 | 814 | static irqreturn_t acpi_irq(int irq, void *dev_id) |
1da177e4 | 815 | { |
5229e87d LB |
816 | u32 handled; |
817 | ||
818 | handled = (*acpi_irq_handler) (acpi_irq_context); | |
819 | ||
820 | if (handled) { | |
821 | acpi_irq_handled++; | |
822 | return IRQ_HANDLED; | |
88bea188 LB |
823 | } else { |
824 | acpi_irq_not_handled++; | |
5229e87d | 825 | return IRQ_NONE; |
88bea188 | 826 | } |
1da177e4 LT |
827 | } |
828 | ||
829 | acpi_status | |
4be44fcd LB |
830 | acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler, |
831 | void *context) | |
1da177e4 LT |
832 | { |
833 | unsigned int irq; | |
834 | ||
5229e87d LB |
835 | acpi_irq_stats_init(); |
836 | ||
1da177e4 | 837 | /* |
23fe3630 RW |
838 | * ACPI interrupts different from the SCI in our copy of the FADT are |
839 | * not supported. | |
1da177e4 | 840 | */ |
23fe3630 RW |
841 | if (gsi != acpi_gbl_FADT.sci_interrupt) |
842 | return AE_BAD_PARAMETER; | |
843 | ||
844 | if (acpi_irq_handler) | |
845 | return AE_ALREADY_ACQUIRED; | |
846 | ||
1da177e4 LT |
847 | if (acpi_gsi_to_irq(gsi, &irq) < 0) { |
848 | printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n", | |
849 | gsi); | |
850 | return AE_OK; | |
851 | } | |
852 | ||
853 | acpi_irq_handler = handler; | |
854 | acpi_irq_context = context; | |
a8d46b9e | 855 | if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) { |
1da177e4 | 856 | printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq); |
23fe3630 | 857 | acpi_irq_handler = NULL; |
1da177e4 LT |
858 | return AE_NOT_ACQUIRED; |
859 | } | |
49e4b843 | 860 | acpi_sci_irq = irq; |
1da177e4 LT |
861 | |
862 | return AE_OK; | |
863 | } | |
864 | ||
49e4b843 | 865 | acpi_status acpi_os_remove_interrupt_handler(u32 gsi, acpi_osd_handler handler) |
1da177e4 | 866 | { |
49e4b843 | 867 | if (gsi != acpi_gbl_FADT.sci_interrupt || !acpi_sci_irq_valid()) |
23fe3630 RW |
868 | return AE_BAD_PARAMETER; |
869 | ||
49e4b843 | 870 | free_irq(acpi_sci_irq, acpi_irq); |
23fe3630 | 871 | acpi_irq_handler = NULL; |
49e4b843 | 872 | acpi_sci_irq = INVALID_ACPI_IRQ; |
1da177e4 LT |
873 | |
874 | return AE_OK; | |
875 | } | |
876 | ||
877 | /* | |
878 | * Running in interpreter thread context, safe to sleep | |
879 | */ | |
880 | ||
439913ff | 881 | void acpi_os_sleep(u64 ms) |
1da177e4 | 882 | { |
30282299 | 883 | msleep(ms); |
1da177e4 | 884 | } |
4be44fcd | 885 | |
4be44fcd | 886 | void acpi_os_stall(u32 us) |
1da177e4 LT |
887 | { |
888 | while (us) { | |
889 | u32 delay = 1000; | |
890 | ||
891 | if (delay > us) | |
892 | delay = us; | |
893 | udelay(delay); | |
894 | touch_nmi_watchdog(); | |
895 | us -= delay; | |
896 | } | |
897 | } | |
4be44fcd | 898 | |
1da177e4 LT |
899 | /* |
900 | * Support ACPI 3.0 AML Timer operand | |
901 | * Returns 64-bit free-running, monotonically increasing timer | |
902 | * with 100ns granularity | |
903 | */ | |
4be44fcd | 904 | u64 acpi_os_get_timer(void) |
1da177e4 | 905 | { |
10619066 MW |
906 | u64 time_ns = ktime_to_ns(ktime_get()); |
907 | do_div(time_ns, 100); | |
908 | return time_ns; | |
1da177e4 LT |
909 | } |
910 | ||
4be44fcd | 911 | acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width) |
1da177e4 LT |
912 | { |
913 | u32 dummy; | |
914 | ||
915 | if (!value) | |
916 | value = &dummy; | |
917 | ||
49fbabf5 ZY |
918 | *value = 0; |
919 | if (width <= 8) { | |
4be44fcd | 920 | *(u8 *) value = inb(port); |
49fbabf5 | 921 | } else if (width <= 16) { |
4be44fcd | 922 | *(u16 *) value = inw(port); |
49fbabf5 | 923 | } else if (width <= 32) { |
4be44fcd | 924 | *(u32 *) value = inl(port); |
49fbabf5 | 925 | } else { |
1da177e4 LT |
926 | BUG(); |
927 | } | |
928 | ||
929 | return AE_OK; | |
930 | } | |
4be44fcd | 931 | |
1da177e4 LT |
932 | EXPORT_SYMBOL(acpi_os_read_port); |
933 | ||
4be44fcd | 934 | acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width) |
1da177e4 | 935 | { |
49fbabf5 | 936 | if (width <= 8) { |
1da177e4 | 937 | outb(value, port); |
49fbabf5 | 938 | } else if (width <= 16) { |
1da177e4 | 939 | outw(value, port); |
49fbabf5 | 940 | } else if (width <= 32) { |
1da177e4 | 941 | outl(value, port); |
49fbabf5 | 942 | } else { |
1da177e4 LT |
943 | BUG(); |
944 | } | |
945 | ||
946 | return AE_OK; | |
947 | } | |
4be44fcd | 948 | |
1da177e4 LT |
949 | EXPORT_SYMBOL(acpi_os_write_port); |
950 | ||
e615bf5b | 951 | acpi_status |
653f4b53 | 952 | acpi_os_read_memory(acpi_physical_address phys_addr, u64 *value, u32 width) |
e615bf5b MS |
953 | { |
954 | void __iomem *virt_addr; | |
955 | unsigned int size = width / 8; | |
956 | bool unmap = false; | |
957 | u64 dummy; | |
958 | ||
959 | rcu_read_lock(); | |
960 | virt_addr = acpi_map_vaddr_lookup(phys_addr, size); | |
961 | if (!virt_addr) { | |
962 | rcu_read_unlock(); | |
963 | virt_addr = acpi_os_ioremap(phys_addr, size); | |
964 | if (!virt_addr) | |
965 | return AE_BAD_ADDRESS; | |
966 | unmap = true; | |
967 | } | |
968 | ||
969 | if (!value) | |
970 | value = &dummy; | |
971 | ||
972 | switch (width) { | |
973 | case 8: | |
974 | *(u8 *) value = readb(virt_addr); | |
975 | break; | |
976 | case 16: | |
977 | *(u16 *) value = readw(virt_addr); | |
978 | break; | |
979 | case 32: | |
980 | *(u32 *) value = readl(virt_addr); | |
981 | break; | |
982 | case 64: | |
3277b4ea | 983 | *(u64 *) value = readq(virt_addr); |
e615bf5b MS |
984 | break; |
985 | default: | |
986 | BUG(); | |
987 | } | |
988 | ||
989 | if (unmap) | |
990 | iounmap(virt_addr); | |
991 | else | |
992 | rcu_read_unlock(); | |
993 | ||
994 | return AE_OK; | |
995 | } | |
996 | ||
e615bf5b | 997 | acpi_status |
653f4b53 | 998 | acpi_os_write_memory(acpi_physical_address phys_addr, u64 value, u32 width) |
e615bf5b MS |
999 | { |
1000 | void __iomem *virt_addr; | |
1001 | unsigned int size = width / 8; | |
1002 | bool unmap = false; | |
1003 | ||
1004 | rcu_read_lock(); | |
1005 | virt_addr = acpi_map_vaddr_lookup(phys_addr, size); | |
1006 | if (!virt_addr) { | |
1007 | rcu_read_unlock(); | |
1008 | virt_addr = acpi_os_ioremap(phys_addr, size); | |
1009 | if (!virt_addr) | |
1010 | return AE_BAD_ADDRESS; | |
1011 | unmap = true; | |
1012 | } | |
1013 | ||
1014 | switch (width) { | |
1015 | case 8: | |
1016 | writeb(value, virt_addr); | |
1017 | break; | |
1018 | case 16: | |
1019 | writew(value, virt_addr); | |
1020 | break; | |
1021 | case 32: | |
1022 | writel(value, virt_addr); | |
1023 | break; | |
1024 | case 64: | |
3277b4ea | 1025 | writeq(value, virt_addr); |
e615bf5b MS |
1026 | break; |
1027 | default: | |
1028 | BUG(); | |
1029 | } | |
1030 | ||
1031 | if (unmap) | |
1032 | iounmap(virt_addr); | |
1033 | else | |
1034 | rcu_read_unlock(); | |
1035 | ||
1036 | return AE_OK; | |
1037 | } | |
1038 | ||
1da177e4 | 1039 | acpi_status |
4be44fcd | 1040 | acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
c5f0231e | 1041 | u64 *value, u32 width) |
1da177e4 LT |
1042 | { |
1043 | int result, size; | |
c5f0231e | 1044 | u32 value32; |
1da177e4 LT |
1045 | |
1046 | if (!value) | |
1047 | return AE_BAD_PARAMETER; | |
1048 | ||
1049 | switch (width) { | |
1050 | case 8: | |
1051 | size = 1; | |
1052 | break; | |
1053 | case 16: | |
1054 | size = 2; | |
1055 | break; | |
1056 | case 32: | |
1057 | size = 4; | |
1058 | break; | |
1059 | default: | |
1060 | return AE_ERROR; | |
1061 | } | |
1062 | ||
b6ce068a MW |
1063 | result = raw_pci_read(pci_id->segment, pci_id->bus, |
1064 | PCI_DEVFN(pci_id->device, pci_id->function), | |
c5f0231e BM |
1065 | reg, size, &value32); |
1066 | *value = value32; | |
1da177e4 LT |
1067 | |
1068 | return (result ? AE_ERROR : AE_OK); | |
1069 | } | |
4be44fcd | 1070 | |
1da177e4 | 1071 | acpi_status |
4be44fcd | 1072 | acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
439913ff | 1073 | u64 value, u32 width) |
1da177e4 LT |
1074 | { |
1075 | int result, size; | |
1076 | ||
1077 | switch (width) { | |
1078 | case 8: | |
1079 | size = 1; | |
1080 | break; | |
1081 | case 16: | |
1082 | size = 2; | |
1083 | break; | |
1084 | case 32: | |
1085 | size = 4; | |
1086 | break; | |
1087 | default: | |
1088 | return AE_ERROR; | |
1089 | } | |
1090 | ||
b6ce068a MW |
1091 | result = raw_pci_write(pci_id->segment, pci_id->bus, |
1092 | PCI_DEVFN(pci_id->device, pci_id->function), | |
1093 | reg, size, value); | |
1da177e4 LT |
1094 | |
1095 | return (result ? AE_ERROR : AE_OK); | |
1096 | } | |
1097 | ||
65f27f38 | 1098 | static void acpi_os_execute_deferred(struct work_struct *work) |
88db5e14 AS |
1099 | { |
1100 | struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work); | |
88db5e14 | 1101 | |
19cd847a ZR |
1102 | dpc->function(dpc->context); |
1103 | kfree(dpc); | |
19cd847a ZR |
1104 | } |
1105 | ||
b8d35192 AS |
1106 | /******************************************************************************* |
1107 | * | |
1108 | * FUNCTION: acpi_os_execute | |
1109 | * | |
1110 | * PARAMETERS: Type - Type of the callback | |
1111 | * Function - Function to be executed | |
1112 | * Context - Function parameters | |
1113 | * | |
1114 | * RETURN: Status | |
1115 | * | |
1116 | * DESCRIPTION: Depending on type, either queues function for deferred execution or | |
1117 | * immediately executes function on a separate thread. | |
1118 | * | |
1119 | ******************************************************************************/ | |
1120 | ||
7b98118a RW |
1121 | acpi_status acpi_os_execute(acpi_execute_type type, |
1122 | acpi_osd_exec_callback function, void *context) | |
1da177e4 | 1123 | { |
4be44fcd LB |
1124 | acpi_status status = AE_OK; |
1125 | struct acpi_os_dpc *dpc; | |
17bc54ee | 1126 | struct workqueue_struct *queue; |
19cd847a | 1127 | int ret; |
72945b2b LB |
1128 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
1129 | "Scheduling function [%p(%p)] for deferred execution.\n", | |
1130 | function, context)); | |
1da177e4 | 1131 | |
1da177e4 LT |
1132 | /* |
1133 | * Allocate/initialize DPC structure. Note that this memory will be | |
65f27f38 | 1134 | * freed by the callee. The kernel handles the work_struct list in a |
1da177e4 LT |
1135 | * way that allows us to also free its memory inside the callee. |
1136 | * Because we may want to schedule several tasks with different | |
1137 | * parameters we can't use the approach some kernel code uses of | |
65f27f38 | 1138 | * having a static work_struct. |
1da177e4 | 1139 | */ |
72945b2b | 1140 | |
3ae45a27 | 1141 | dpc = kzalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC); |
1da177e4 | 1142 | if (!dpc) |
889c78be | 1143 | return AE_NO_MEMORY; |
b976fe19 | 1144 | |
1da177e4 LT |
1145 | dpc->function = function; |
1146 | dpc->context = context; | |
b976fe19 | 1147 | |
c02256be | 1148 | /* |
3ae45a27 RW |
1149 | * To prevent lockdep from complaining unnecessarily, make sure that |
1150 | * there is a different static lockdep key for each workqueue by using | |
1151 | * INIT_WORK() for each of them separately. | |
c02256be | 1152 | */ |
7b98118a | 1153 | if (type == OSL_NOTIFY_HANDLER) { |
3ae45a27 | 1154 | queue = kacpi_notify_wq; |
bc73675b | 1155 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); |
3ae45a27 RW |
1156 | } else { |
1157 | queue = kacpid_wq; | |
bc73675b | 1158 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); |
3ae45a27 | 1159 | } |
bc73675b | 1160 | |
8fec62b2 TH |
1161 | /* |
1162 | * On some machines, a software-initiated SMI causes corruption unless | |
1163 | * the SMI runs on CPU 0. An SMI can be initiated by any AML, but | |
1164 | * typically it's done in GPE-related methods that are run via | |
1165 | * workqueues, so we can avoid the known corruption cases by always | |
1166 | * queueing on CPU 0. | |
1167 | */ | |
1168 | ret = queue_work_on(0, queue, &dpc->work); | |
19cd847a ZR |
1169 | |
1170 | if (!ret) { | |
55ac9a01 LM |
1171 | printk(KERN_ERR PREFIX |
1172 | "Call to queue_work() failed.\n"); | |
17bc54ee AS |
1173 | status = AE_ERROR; |
1174 | kfree(dpc); | |
1da177e4 | 1175 | } |
889c78be | 1176 | return status; |
1da177e4 | 1177 | } |
7b98118a | 1178 | EXPORT_SYMBOL(acpi_os_execute); |
4be44fcd | 1179 | |
7b98118a | 1180 | void acpi_os_wait_events_complete(void) |
19cd847a | 1181 | { |
90253a79 LZ |
1182 | /* |
1183 | * Make sure the GPE handler or the fixed event handler is not used | |
1184 | * on another CPU after removal. | |
1185 | */ | |
1186 | if (acpi_irq_handler) | |
1187 | synchronize_hardirq(acpi_gbl_FADT.sci_interrupt); | |
7b98118a RW |
1188 | flush_workqueue(kacpid_wq); |
1189 | flush_workqueue(kacpi_notify_wq); | |
19cd847a | 1190 | } |
1da177e4 | 1191 | |
7b98118a RW |
1192 | struct acpi_hp_work { |
1193 | struct work_struct work; | |
1e3bcb59 | 1194 | struct acpi_device *adev; |
7b98118a RW |
1195 | u32 src; |
1196 | }; | |
1197 | ||
1198 | static void acpi_hotplug_work_fn(struct work_struct *work) | |
19cd847a | 1199 | { |
7b98118a RW |
1200 | struct acpi_hp_work *hpw = container_of(work, struct acpi_hp_work, work); |
1201 | ||
1202 | acpi_os_wait_events_complete(); | |
1e3bcb59 | 1203 | acpi_device_hotplug(hpw->adev, hpw->src); |
7b98118a | 1204 | kfree(hpw); |
19cd847a ZR |
1205 | } |
1206 | ||
1e3bcb59 | 1207 | acpi_status acpi_hotplug_schedule(struct acpi_device *adev, u32 src) |
1da177e4 | 1208 | { |
7b98118a RW |
1209 | struct acpi_hp_work *hpw; |
1210 | ||
1211 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, | |
1e3bcb59 RW |
1212 | "Scheduling hotplug event (%p, %u) for deferred execution.\n", |
1213 | adev, src)); | |
7b98118a RW |
1214 | |
1215 | hpw = kmalloc(sizeof(*hpw), GFP_KERNEL); | |
1216 | if (!hpw) | |
1217 | return AE_NO_MEMORY; | |
1218 | ||
1219 | INIT_WORK(&hpw->work, acpi_hotplug_work_fn); | |
1e3bcb59 | 1220 | hpw->adev = adev; |
7b98118a RW |
1221 | hpw->src = src; |
1222 | /* | |
1223 | * We can't run hotplug code in kacpid_wq/kacpid_notify_wq etc., because | |
1224 | * the hotplug code may call driver .remove() functions, which may | |
1225 | * invoke flush_scheduled_work()/acpi_os_wait_events_complete() to flush | |
1226 | * these workqueues. | |
1227 | */ | |
1228 | if (!queue_work(kacpi_hotplug_wq, &hpw->work)) { | |
1229 | kfree(hpw); | |
1230 | return AE_ERROR; | |
1231 | } | |
1232 | return AE_OK; | |
1da177e4 | 1233 | } |
4be44fcd | 1234 | |
d783156e RW |
1235 | bool acpi_queue_hotplug_work(struct work_struct *work) |
1236 | { | |
1237 | return queue_work(kacpi_hotplug_wq, work); | |
1238 | } | |
1da177e4 | 1239 | |
1da177e4 | 1240 | acpi_status |
4be44fcd | 1241 | acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle) |
1da177e4 | 1242 | { |
4be44fcd | 1243 | struct semaphore *sem = NULL; |
1da177e4 | 1244 | |
2d0acb4a | 1245 | sem = acpi_os_allocate_zeroed(sizeof(struct semaphore)); |
1da177e4 | 1246 | if (!sem) |
d550d98d | 1247 | return AE_NO_MEMORY; |
1da177e4 LT |
1248 | |
1249 | sema_init(sem, initial_units); | |
1250 | ||
4be44fcd | 1251 | *handle = (acpi_handle *) sem; |
1da177e4 | 1252 | |
4be44fcd LB |
1253 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n", |
1254 | *handle, initial_units)); | |
1da177e4 | 1255 | |
d550d98d | 1256 | return AE_OK; |
1da177e4 | 1257 | } |
1da177e4 | 1258 | |
1da177e4 LT |
1259 | /* |
1260 | * TODO: A better way to delete semaphores? Linux doesn't have a | |
1261 | * 'delete_semaphore()' function -- may result in an invalid | |
1262 | * pointer dereference for non-synchronized consumers. Should | |
1263 | * we at least check for blocked threads and signal/cancel them? | |
1264 | */ | |
1265 | ||
4be44fcd | 1266 | acpi_status acpi_os_delete_semaphore(acpi_handle handle) |
1da177e4 | 1267 | { |
4be44fcd | 1268 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 1269 | |
1da177e4 | 1270 | if (!sem) |
d550d98d | 1271 | return AE_BAD_PARAMETER; |
1da177e4 | 1272 | |
4be44fcd | 1273 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle)); |
1da177e4 | 1274 | |
f1241c87 | 1275 | BUG_ON(!list_empty(&sem->wait_list)); |
02438d87 | 1276 | kfree(sem); |
4be44fcd | 1277 | sem = NULL; |
1da177e4 | 1278 | |
d550d98d | 1279 | return AE_OK; |
1da177e4 | 1280 | } |
1da177e4 | 1281 | |
1da177e4 | 1282 | /* |
1da177e4 LT |
1283 | * TODO: Support for units > 1? |
1284 | */ | |
4be44fcd | 1285 | acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout) |
1da177e4 | 1286 | { |
4be44fcd LB |
1287 | acpi_status status = AE_OK; |
1288 | struct semaphore *sem = (struct semaphore *)handle; | |
f1241c87 | 1289 | long jiffies; |
4be44fcd | 1290 | int ret = 0; |
1da177e4 | 1291 | |
7901a052 LZ |
1292 | if (!acpi_os_initialized) |
1293 | return AE_OK; | |
1294 | ||
1da177e4 | 1295 | if (!sem || (units < 1)) |
d550d98d | 1296 | return AE_BAD_PARAMETER; |
1da177e4 LT |
1297 | |
1298 | if (units > 1) | |
d550d98d | 1299 | return AE_SUPPORT; |
1da177e4 | 1300 | |
4be44fcd LB |
1301 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n", |
1302 | handle, units, timeout)); | |
1da177e4 | 1303 | |
f1241c87 MW |
1304 | if (timeout == ACPI_WAIT_FOREVER) |
1305 | jiffies = MAX_SCHEDULE_TIMEOUT; | |
1306 | else | |
1307 | jiffies = msecs_to_jiffies(timeout); | |
cad1525a | 1308 | |
f1241c87 MW |
1309 | ret = down_timeout(sem, jiffies); |
1310 | if (ret) | |
1311 | status = AE_TIME; | |
1da177e4 LT |
1312 | |
1313 | if (ACPI_FAILURE(status)) { | |
9e7e2c04 | 1314 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, |
a6fc6720 | 1315 | "Failed to acquire semaphore[%p|%d|%d], %s", |
4be44fcd LB |
1316 | handle, units, timeout, |
1317 | acpi_format_exception(status))); | |
1318 | } else { | |
1319 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, | |
a6fc6720 | 1320 | "Acquired semaphore[%p|%d|%d]", handle, |
4be44fcd | 1321 | units, timeout)); |
1da177e4 LT |
1322 | } |
1323 | ||
d550d98d | 1324 | return status; |
1da177e4 | 1325 | } |
1da177e4 | 1326 | |
1da177e4 LT |
1327 | /* |
1328 | * TODO: Support for units > 1? | |
1329 | */ | |
4be44fcd | 1330 | acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units) |
1da177e4 | 1331 | { |
4be44fcd | 1332 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 1333 | |
7901a052 LZ |
1334 | if (!acpi_os_initialized) |
1335 | return AE_OK; | |
1336 | ||
1da177e4 | 1337 | if (!sem || (units < 1)) |
d550d98d | 1338 | return AE_BAD_PARAMETER; |
1da177e4 LT |
1339 | |
1340 | if (units > 1) | |
d550d98d | 1341 | return AE_SUPPORT; |
1da177e4 | 1342 | |
4be44fcd LB |
1343 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle, |
1344 | units)); | |
1da177e4 LT |
1345 | |
1346 | up(sem); | |
1347 | ||
d550d98d | 1348 | return AE_OK; |
1da177e4 | 1349 | } |
4be44fcd | 1350 | |
1da177e4 | 1351 | #ifdef ACPI_FUTURE_USAGE |
4be44fcd | 1352 | u32 acpi_os_get_line(char *buffer) |
1da177e4 LT |
1353 | { |
1354 | ||
1355 | #ifdef ENABLE_DEBUGGER | |
1356 | if (acpi_in_debugger) { | |
1357 | u32 chars; | |
1358 | ||
1359 | kdb_read(buffer, sizeof(line_buf)); | |
1360 | ||
1361 | /* remove the CR kdb includes */ | |
1362 | chars = strlen(buffer) - 1; | |
1363 | buffer[chars] = '\0'; | |
1364 | } | |
1365 | #endif | |
1366 | ||
1367 | return 0; | |
1368 | } | |
4be44fcd | 1369 | #endif /* ACPI_FUTURE_USAGE */ |
1da177e4 | 1370 | |
4be44fcd | 1371 | acpi_status acpi_os_signal(u32 function, void *info) |
1da177e4 | 1372 | { |
4be44fcd | 1373 | switch (function) { |
1da177e4 LT |
1374 | case ACPI_SIGNAL_FATAL: |
1375 | printk(KERN_ERR PREFIX "Fatal opcode executed\n"); | |
1376 | break; | |
1377 | case ACPI_SIGNAL_BREAKPOINT: | |
1378 | /* | |
1379 | * AML Breakpoint | |
1380 | * ACPI spec. says to treat it as a NOP unless | |
1381 | * you are debugging. So if/when we integrate | |
1382 | * AML debugger into the kernel debugger its | |
1383 | * hook will go here. But until then it is | |
1384 | * not useful to print anything on breakpoints. | |
1385 | */ | |
1386 | break; | |
1387 | default: | |
1388 | break; | |
1389 | } | |
1390 | ||
1391 | return AE_OK; | |
1392 | } | |
4be44fcd | 1393 | |
4be44fcd | 1394 | static int __init acpi_os_name_setup(char *str) |
1da177e4 LT |
1395 | { |
1396 | char *p = acpi_os_name; | |
4be44fcd | 1397 | int count = ACPI_MAX_OVERRIDE_LEN - 1; |
1da177e4 LT |
1398 | |
1399 | if (!str || !*str) | |
1400 | return 0; | |
1401 | ||
5e2be4e0 | 1402 | for (; count-- && *str; str++) { |
1da177e4 LT |
1403 | if (isalnum(*str) || *str == ' ' || *str == ':') |
1404 | *p++ = *str; | |
1405 | else if (*str == '\'' || *str == '"') | |
1406 | continue; | |
1407 | else | |
1408 | break; | |
1409 | } | |
1410 | *p = 0; | |
1411 | ||
1412 | return 1; | |
4be44fcd | 1413 | |
1da177e4 LT |
1414 | } |
1415 | ||
1416 | __setup("acpi_os_name=", acpi_os_name_setup); | |
1417 | ||
12d32064 LM |
1418 | #define OSI_STRING_LENGTH_MAX 64 /* arbitrary */ |
1419 | #define OSI_STRING_ENTRIES_MAX 16 /* arbitrary */ | |
1420 | ||
1421 | struct osi_setup_entry { | |
1422 | char string[OSI_STRING_LENGTH_MAX]; | |
1423 | bool enable; | |
1424 | }; | |
1425 | ||
e73d3136 HG |
1426 | static struct osi_setup_entry |
1427 | osi_setup_entries[OSI_STRING_ENTRIES_MAX] __initdata = { | |
aa165971 SL |
1428 | {"Module Device", true}, |
1429 | {"Processor Device", true}, | |
1430 | {"3.0 _SCP Extensions", true}, | |
1431 | {"Processor Aggregator Device", true}, | |
1432 | }; | |
12d32064 | 1433 | |
d90aa92c LM |
1434 | void __init acpi_osi_setup(char *str) |
1435 | { | |
12d32064 LM |
1436 | struct osi_setup_entry *osi; |
1437 | bool enable = true; | |
1438 | int i; | |
1439 | ||
d90aa92c LM |
1440 | if (!acpi_gbl_create_osi_method) |
1441 | return; | |
1442 | ||
1443 | if (str == NULL || *str == '\0') { | |
1444 | printk(KERN_INFO PREFIX "_OSI method disabled\n"); | |
1445 | acpi_gbl_create_osi_method = FALSE; | |
12d32064 LM |
1446 | return; |
1447 | } | |
1448 | ||
1449 | if (*str == '!') { | |
1450 | str++; | |
5dc17986 LZ |
1451 | if (*str == '\0') { |
1452 | osi_linux.default_disabling = 1; | |
1453 | return; | |
741d8128 LZ |
1454 | } else if (*str == '*') { |
1455 | acpi_update_interfaces(ACPI_DISABLE_ALL_STRINGS); | |
1456 | for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { | |
1457 | osi = &osi_setup_entries[i]; | |
1458 | osi->enable = false; | |
1459 | } | |
1460 | return; | |
5dc17986 | 1461 | } |
12d32064 LM |
1462 | enable = false; |
1463 | } | |
1464 | ||
1465 | for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { | |
1466 | osi = &osi_setup_entries[i]; | |
1467 | if (!strcmp(osi->string, str)) { | |
1468 | osi->enable = enable; | |
1469 | break; | |
1470 | } else if (osi->string[0] == '\0') { | |
1471 | osi->enable = enable; | |
1472 | strncpy(osi->string, str, OSI_STRING_LENGTH_MAX); | |
1473 | break; | |
1474 | } | |
1475 | } | |
d90aa92c LM |
1476 | } |
1477 | ||
d4b7dc49 LB |
1478 | static void __init set_osi_linux(unsigned int enable) |
1479 | { | |
d90aa92c | 1480 | if (osi_linux.enable != enable) |
d4b7dc49 | 1481 | osi_linux.enable = enable; |
b0ed7a91 LM |
1482 | |
1483 | if (osi_linux.enable) | |
1484 | acpi_osi_setup("Linux"); | |
1485 | else | |
1486 | acpi_osi_setup("!Linux"); | |
1487 | ||
d4b7dc49 LB |
1488 | return; |
1489 | } | |
1490 | ||
1491 | static void __init acpi_cmdline_osi_linux(unsigned int enable) | |
1492 | { | |
d90aa92c LM |
1493 | osi_linux.cmdline = 1; /* cmdline set the default and override DMI */ |
1494 | osi_linux.dmi = 0; | |
d4b7dc49 LB |
1495 | set_osi_linux(enable); |
1496 | ||
1497 | return; | |
1498 | } | |
1499 | ||
1500 | void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d) | |
1501 | { | |
d4b7dc49 LB |
1502 | printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident); |
1503 | ||
1504 | if (enable == -1) | |
1505 | return; | |
1506 | ||
d90aa92c | 1507 | osi_linux.dmi = 1; /* DMI knows that this box asks OSI(Linux) */ |
d4b7dc49 | 1508 | set_osi_linux(enable); |
f507654d | 1509 | |
f507654d LB |
1510 | return; |
1511 | } | |
1512 | ||
1da177e4 | 1513 | /* |
ae00d812 LB |
1514 | * Modify the list of "OS Interfaces" reported to BIOS via _OSI |
1515 | * | |
1da177e4 | 1516 | * empty string disables _OSI |
ae00d812 LB |
1517 | * string starting with '!' disables that string |
1518 | * otherwise string is added to list, augmenting built-in strings | |
1da177e4 | 1519 | */ |
b0ed7a91 | 1520 | static void __init acpi_osi_setup_late(void) |
1da177e4 | 1521 | { |
12d32064 LM |
1522 | struct osi_setup_entry *osi; |
1523 | char *str; | |
1524 | int i; | |
d90aa92c | 1525 | acpi_status status; |
b0ed7a91 | 1526 | |
5dc17986 LZ |
1527 | if (osi_linux.default_disabling) { |
1528 | status = acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS); | |
1529 | ||
1530 | if (ACPI_SUCCESS(status)) | |
1531 | printk(KERN_INFO PREFIX "Disabled all _OSI OS vendors\n"); | |
1532 | } | |
1533 | ||
12d32064 LM |
1534 | for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { |
1535 | osi = &osi_setup_entries[i]; | |
1536 | str = osi->string; | |
b0ed7a91 | 1537 | |
12d32064 LM |
1538 | if (*str == '\0') |
1539 | break; | |
1540 | if (osi->enable) { | |
1541 | status = acpi_install_interface(str); | |
d90aa92c | 1542 | |
12d32064 LM |
1543 | if (ACPI_SUCCESS(status)) |
1544 | printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str); | |
1545 | } else { | |
1546 | status = acpi_remove_interface(str); | |
d90aa92c | 1547 | |
12d32064 LM |
1548 | if (ACPI_SUCCESS(status)) |
1549 | printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str); | |
1550 | } | |
b0ed7a91 LM |
1551 | } |
1552 | } | |
1553 | ||
d90aa92c | 1554 | static int __init osi_setup(char *str) |
b0ed7a91 | 1555 | { |
d90aa92c LM |
1556 | if (str && !strcmp("Linux", str)) |
1557 | acpi_cmdline_osi_linux(1); | |
1558 | else if (str && !strcmp("!Linux", str)) | |
1559 | acpi_cmdline_osi_linux(0); | |
1560 | else | |
1561 | acpi_osi_setup(str); | |
1da177e4 LT |
1562 | |
1563 | return 1; | |
1564 | } | |
1565 | ||
d90aa92c | 1566 | __setup("acpi_osi=", osi_setup); |
1da177e4 | 1567 | |
22b5afce | 1568 | /* |
08e1d7c0 | 1569 | * Disable the auto-serialization of named objects creation methods. |
22b5afce | 1570 | * |
08e1d7c0 | 1571 | * This feature is enabled by default. It marks the AML control methods |
22b5afce BM |
1572 | * that contain the opcodes to create named objects as "Serialized". |
1573 | */ | |
08e1d7c0 | 1574 | static int __init acpi_no_auto_serialize_setup(char *str) |
1da177e4 | 1575 | { |
08e1d7c0 LZ |
1576 | acpi_gbl_auto_serialize_methods = FALSE; |
1577 | pr_info("ACPI: auto-serialization disabled\n"); | |
1da177e4 LT |
1578 | |
1579 | return 1; | |
1580 | } | |
1581 | ||
08e1d7c0 | 1582 | __setup("acpi_no_auto_serialize", acpi_no_auto_serialize_setup); |
1da177e4 | 1583 | |
df92e695 TR |
1584 | /* Check of resource interference between native drivers and ACPI |
1585 | * OperationRegions (SystemIO and System Memory only). | |
1586 | * IO ports and memory declared in ACPI might be used by the ACPI subsystem | |
1587 | * in arbitrary AML code and can interfere with legacy drivers. | |
1588 | * acpi_enforce_resources= can be set to: | |
1589 | * | |
7e90560c | 1590 | * - strict (default) (2) |
df92e695 | 1591 | * -> further driver trying to access the resources will not load |
7e90560c | 1592 | * - lax (1) |
df92e695 TR |
1593 | * -> further driver trying to access the resources will load, but you |
1594 | * get a system message that something might go wrong... | |
1595 | * | |
1596 | * - no (0) | |
1597 | * -> ACPI Operation Region resources will not be registered | |
1598 | * | |
1599 | */ | |
1600 | #define ENFORCE_RESOURCES_STRICT 2 | |
1601 | #define ENFORCE_RESOURCES_LAX 1 | |
1602 | #define ENFORCE_RESOURCES_NO 0 | |
1603 | ||
7e90560c | 1604 | static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; |
df92e695 TR |
1605 | |
1606 | static int __init acpi_enforce_resources_setup(char *str) | |
1607 | { | |
1608 | if (str == NULL || *str == '\0') | |
1609 | return 0; | |
1610 | ||
1611 | if (!strcmp("strict", str)) | |
1612 | acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; | |
1613 | else if (!strcmp("lax", str)) | |
1614 | acpi_enforce_resources = ENFORCE_RESOURCES_LAX; | |
1615 | else if (!strcmp("no", str)) | |
1616 | acpi_enforce_resources = ENFORCE_RESOURCES_NO; | |
1617 | ||
1618 | return 1; | |
1619 | } | |
1620 | ||
1621 | __setup("acpi_enforce_resources=", acpi_enforce_resources_setup); | |
1622 | ||
1623 | /* Check for resource conflicts between ACPI OperationRegions and native | |
1624 | * drivers */ | |
876fba43 | 1625 | int acpi_check_resource_conflict(const struct resource *res) |
df92e695 | 1626 | { |
f654c0fe LM |
1627 | acpi_adr_space_type space_id; |
1628 | acpi_size length; | |
1629 | u8 warn = 0; | |
1630 | int clash = 0; | |
df92e695 TR |
1631 | |
1632 | if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) | |
1633 | return 0; | |
1634 | if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM)) | |
1635 | return 0; | |
1636 | ||
f654c0fe LM |
1637 | if (res->flags & IORESOURCE_IO) |
1638 | space_id = ACPI_ADR_SPACE_SYSTEM_IO; | |
1639 | else | |
1640 | space_id = ACPI_ADR_SPACE_SYSTEM_MEMORY; | |
df92e695 | 1641 | |
e4f52244 | 1642 | length = resource_size(res); |
f654c0fe LM |
1643 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) |
1644 | warn = 1; | |
1645 | clash = acpi_check_address_range(space_id, res->start, length, warn); | |
df92e695 TR |
1646 | |
1647 | if (clash) { | |
1648 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) { | |
14f03343 JD |
1649 | if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX) |
1650 | printk(KERN_NOTICE "ACPI: This conflict may" | |
1651 | " cause random problems and system" | |
1652 | " instability\n"); | |
1653 | printk(KERN_INFO "ACPI: If an ACPI driver is available" | |
1654 | " for this device, you should use it instead of" | |
1655 | " the native driver\n"); | |
df92e695 TR |
1656 | } |
1657 | if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT) | |
1658 | return -EBUSY; | |
1659 | } | |
1660 | return 0; | |
1661 | } | |
443dea72 | 1662 | EXPORT_SYMBOL(acpi_check_resource_conflict); |
df92e695 TR |
1663 | |
1664 | int acpi_check_region(resource_size_t start, resource_size_t n, | |
1665 | const char *name) | |
1666 | { | |
1667 | struct resource res = { | |
1668 | .start = start, | |
1669 | .end = start + n - 1, | |
1670 | .name = name, | |
1671 | .flags = IORESOURCE_IO, | |
1672 | }; | |
1673 | ||
1674 | return acpi_check_resource_conflict(&res); | |
1675 | } | |
1676 | EXPORT_SYMBOL(acpi_check_region); | |
1677 | ||
70dd6bea JD |
1678 | /* |
1679 | * Let drivers know whether the resource checks are effective | |
1680 | */ | |
1681 | int acpi_resources_are_enforced(void) | |
1682 | { | |
1683 | return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT; | |
1684 | } | |
1685 | EXPORT_SYMBOL(acpi_resources_are_enforced); | |
1686 | ||
a87878ba HG |
1687 | bool acpi_osi_is_win8(void) |
1688 | { | |
1689 | return acpi_gbl_osi_data >= ACPI_OSI_WIN_8; | |
1690 | } | |
1691 | EXPORT_SYMBOL(acpi_osi_is_win8); | |
1692 | ||
9f63b88b LM |
1693 | /* |
1694 | * Deallocate the memory for a spinlock. | |
1695 | */ | |
1696 | void acpi_os_delete_lock(acpi_spinlock handle) | |
1697 | { | |
1698 | ACPI_FREE(handle); | |
1699 | } | |
1700 | ||
73459f73 RM |
1701 | /* |
1702 | * Acquire a spinlock. | |
1703 | * | |
1704 | * handle is a pointer to the spinlock_t. | |
73459f73 RM |
1705 | */ |
1706 | ||
967440e3 | 1707 | acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp) |
73459f73 | 1708 | { |
b8e4d893 | 1709 | acpi_cpu_flags flags; |
967440e3 | 1710 | spin_lock_irqsave(lockp, flags); |
73459f73 RM |
1711 | return flags; |
1712 | } | |
1713 | ||
1714 | /* | |
1715 | * Release a spinlock. See above. | |
1716 | */ | |
1717 | ||
967440e3 | 1718 | void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags) |
73459f73 | 1719 | { |
967440e3 | 1720 | spin_unlock_irqrestore(lockp, flags); |
73459f73 RM |
1721 | } |
1722 | ||
73459f73 RM |
1723 | #ifndef ACPI_USE_LOCAL_CACHE |
1724 | ||
1725 | /******************************************************************************* | |
1726 | * | |
1727 | * FUNCTION: acpi_os_create_cache | |
1728 | * | |
b229cf92 BM |
1729 | * PARAMETERS: name - Ascii name for the cache |
1730 | * size - Size of each cached object | |
1731 | * depth - Maximum depth of the cache (in objects) <ignored> | |
1732 | * cache - Where the new cache object is returned | |
73459f73 | 1733 | * |
b229cf92 | 1734 | * RETURN: status |
73459f73 RM |
1735 | * |
1736 | * DESCRIPTION: Create a cache object | |
1737 | * | |
1738 | ******************************************************************************/ | |
1739 | ||
1740 | acpi_status | |
4be44fcd | 1741 | acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache) |
73459f73 | 1742 | { |
20c2df83 | 1743 | *cache = kmem_cache_create(name, size, 0, 0, NULL); |
a6fdbf90 | 1744 | if (*cache == NULL) |
b229cf92 BM |
1745 | return AE_ERROR; |
1746 | else | |
1747 | return AE_OK; | |
73459f73 RM |
1748 | } |
1749 | ||
1750 | /******************************************************************************* | |
1751 | * | |
1752 | * FUNCTION: acpi_os_purge_cache | |
1753 | * | |
1754 | * PARAMETERS: Cache - Handle to cache object | |
1755 | * | |
1756 | * RETURN: Status | |
1757 | * | |
1758 | * DESCRIPTION: Free all objects within the requested cache. | |
1759 | * | |
1760 | ******************************************************************************/ | |
1761 | ||
4be44fcd | 1762 | acpi_status acpi_os_purge_cache(acpi_cache_t * cache) |
73459f73 | 1763 | { |
50dd0969 | 1764 | kmem_cache_shrink(cache); |
4be44fcd | 1765 | return (AE_OK); |
73459f73 RM |
1766 | } |
1767 | ||
1768 | /******************************************************************************* | |
1769 | * | |
1770 | * FUNCTION: acpi_os_delete_cache | |
1771 | * | |
1772 | * PARAMETERS: Cache - Handle to cache object | |
1773 | * | |
1774 | * RETURN: Status | |
1775 | * | |
1776 | * DESCRIPTION: Free all objects within the requested cache and delete the | |
1777 | * cache object. | |
1778 | * | |
1779 | ******************************************************************************/ | |
1780 | ||
4be44fcd | 1781 | acpi_status acpi_os_delete_cache(acpi_cache_t * cache) |
73459f73 | 1782 | { |
1a1d92c1 | 1783 | kmem_cache_destroy(cache); |
4be44fcd | 1784 | return (AE_OK); |
73459f73 RM |
1785 | } |
1786 | ||
1787 | /******************************************************************************* | |
1788 | * | |
1789 | * FUNCTION: acpi_os_release_object | |
1790 | * | |
1791 | * PARAMETERS: Cache - Handle to cache object | |
1792 | * Object - The object to be released | |
1793 | * | |
1794 | * RETURN: None | |
1795 | * | |
1796 | * DESCRIPTION: Release an object to the specified cache. If cache is full, | |
1797 | * the object is deleted. | |
1798 | * | |
1799 | ******************************************************************************/ | |
1800 | ||
4be44fcd | 1801 | acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object) |
73459f73 | 1802 | { |
4be44fcd LB |
1803 | kmem_cache_free(cache, object); |
1804 | return (AE_OK); | |
73459f73 | 1805 | } |
73459f73 | 1806 | #endif |
d362edaf | 1807 | |
a94e88cd | 1808 | static int __init acpi_no_static_ssdt_setup(char *s) |
b75dd297 | 1809 | { |
a94e88cd LZ |
1810 | acpi_gbl_disable_ssdt_table_install = TRUE; |
1811 | pr_info("ACPI: static SSDT installation disabled\n"); | |
b75dd297 | 1812 | |
a94e88cd | 1813 | return 0; |
b75dd297 LZ |
1814 | } |
1815 | ||
a94e88cd | 1816 | early_param("acpi_no_static_ssdt", acpi_no_static_ssdt_setup); |
b75dd297 | 1817 | |
4dde507f LZ |
1818 | static int __init acpi_disable_return_repair(char *s) |
1819 | { | |
1820 | printk(KERN_NOTICE PREFIX | |
1821 | "ACPI: Predefined validation mechanism disabled\n"); | |
1822 | acpi_gbl_disable_auto_repair = TRUE; | |
1823 | ||
1824 | return 1; | |
1825 | } | |
1826 | ||
1827 | __setup("acpica_no_return_repair", acpi_disable_return_repair); | |
1828 | ||
d362edaf MS |
1829 | acpi_status __init acpi_os_initialize(void) |
1830 | { | |
1831 | acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block); | |
1832 | acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block); | |
1833 | acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block); | |
1834 | acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block); | |
a4714a89 RW |
1835 | if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) { |
1836 | /* | |
1837 | * Use acpi_os_map_generic_address to pre-map the reset | |
1838 | * register if it's in system memory. | |
1839 | */ | |
1840 | int rv; | |
1841 | ||
1842 | rv = acpi_os_map_generic_address(&acpi_gbl_FADT.reset_register); | |
1843 | pr_debug(PREFIX "%s: map reset_reg status %d\n", __func__, rv); | |
1844 | } | |
7901a052 | 1845 | acpi_os_initialized = true; |
d362edaf MS |
1846 | |
1847 | return AE_OK; | |
1848 | } | |
1849 | ||
32d47eef | 1850 | acpi_status __init acpi_os_initialize1(void) |
d362edaf | 1851 | { |
44d2588e TH |
1852 | kacpid_wq = alloc_workqueue("kacpid", 0, 1); |
1853 | kacpi_notify_wq = alloc_workqueue("kacpi_notify", 0, 1); | |
d783156e | 1854 | kacpi_hotplug_wq = alloc_ordered_workqueue("kacpi_hotplug", 0); |
d362edaf MS |
1855 | BUG_ON(!kacpid_wq); |
1856 | BUG_ON(!kacpi_notify_wq); | |
1857 | BUG_ON(!kacpi_hotplug_wq); | |
1bd64d42 LB |
1858 | acpi_install_interface_handler(acpi_osi_handler); |
1859 | acpi_osi_setup_late(); | |
d362edaf MS |
1860 | return AE_OK; |
1861 | } | |
1862 | ||
1863 | acpi_status acpi_os_terminate(void) | |
1864 | { | |
1865 | if (acpi_irq_handler) { | |
23fe3630 | 1866 | acpi_os_remove_interrupt_handler(acpi_gbl_FADT.sci_interrupt, |
d362edaf MS |
1867 | acpi_irq_handler); |
1868 | } | |
1869 | ||
1870 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe1_block); | |
1871 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block); | |
1872 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block); | |
1873 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block); | |
a4714a89 RW |
1874 | if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) |
1875 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.reset_register); | |
d362edaf MS |
1876 | |
1877 | destroy_workqueue(kacpid_wq); | |
1878 | destroy_workqueue(kacpi_notify_wq); | |
1879 | destroy_workqueue(kacpi_hotplug_wq); | |
1880 | ||
1881 | return AE_OK; | |
1882 | } | |
09f98a82 TL |
1883 | |
1884 | acpi_status acpi_os_prepare_sleep(u8 sleep_state, u32 pm1a_control, | |
1885 | u32 pm1b_control) | |
1886 | { | |
1887 | int rc = 0; | |
1888 | if (__acpi_os_prepare_sleep) | |
1889 | rc = __acpi_os_prepare_sleep(sleep_state, | |
1890 | pm1a_control, pm1b_control); | |
1891 | if (rc < 0) | |
1892 | return AE_ERROR; | |
1893 | else if (rc > 0) | |
1894 | return AE_CTRL_SKIP; | |
1895 | ||
1896 | return AE_OK; | |
1897 | } | |
1898 | ||
1899 | void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state, | |
1900 | u32 pm1a_ctrl, u32 pm1b_ctrl)) | |
1901 | { | |
1902 | __acpi_os_prepare_sleep = func; | |
1903 | } | |
92d8aff3 | 1904 | |
d6b47b12 BG |
1905 | acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state, u32 val_a, |
1906 | u32 val_b) | |
1907 | { | |
1908 | int rc = 0; | |
1909 | if (__acpi_os_prepare_extended_sleep) | |
1910 | rc = __acpi_os_prepare_extended_sleep(sleep_state, | |
1911 | val_a, val_b); | |
1912 | if (rc < 0) | |
1913 | return AE_ERROR; | |
1914 | else if (rc > 0) | |
1915 | return AE_CTRL_SKIP; | |
1916 | ||
1917 | return AE_OK; | |
1918 | } | |
1919 | ||
1920 | void acpi_os_set_prepare_extended_sleep(int (*func)(u8 sleep_state, | |
1921 | u32 val_a, u32 val_b)) | |
1922 | { | |
1923 | __acpi_os_prepare_extended_sleep = func; | |
1924 | } |