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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; |
1da177e4 | 84 | |
620242ae MS |
85 | /* |
86 | * This list of permanent mappings is for memory that may be accessed from | |
87 | * interrupt context, where we can't do the ioremap(). | |
88 | */ | |
89 | struct acpi_ioremap { | |
90 | struct list_head list; | |
91 | void __iomem *virt; | |
92 | acpi_physical_address phys; | |
93 | acpi_size size; | |
b7c1fadd | 94 | unsigned long refcount; |
620242ae MS |
95 | }; |
96 | ||
97 | static LIST_HEAD(acpi_ioremaps); | |
7bbb8903 | 98 | static DEFINE_MUTEX(acpi_ioremap_lock); |
620242ae | 99 | |
b0ed7a91 | 100 | static void __init acpi_osi_setup_late(void); |
ae00d812 | 101 | |
d4b7dc49 | 102 | /* |
a6e0887f | 103 | * The story of _OSI(Linux) |
d4b7dc49 | 104 | * |
a6e0887f LB |
105 | * From pre-history through Linux-2.6.22, |
106 | * Linux responded TRUE upon a BIOS OSI(Linux) query. | |
d4b7dc49 | 107 | * |
a6e0887f LB |
108 | * Unfortunately, reference BIOS writers got wind of this |
109 | * and put OSI(Linux) in their example code, quickly exposing | |
110 | * this string as ill-conceived and opening the door to | |
111 | * an un-bounded number of BIOS incompatibilities. | |
d4b7dc49 | 112 | * |
a6e0887f LB |
113 | * For example, OSI(Linux) was used on resume to re-POST a |
114 | * video card on one system, because Linux at that time | |
115 | * could not do a speedy restore in its native driver. | |
116 | * But then upon gaining quick native restore capability, | |
117 | * Linux has no way to tell the BIOS to skip the time-consuming | |
118 | * POST -- putting Linux at a permanent performance disadvantage. | |
119 | * On another system, the BIOS writer used OSI(Linux) | |
120 | * to infer native OS support for IPMI! On other systems, | |
121 | * OSI(Linux) simply got in the way of Linux claiming to | |
122 | * be compatible with other operating systems, exposing | |
123 | * BIOS issues such as skipped device initialization. | |
d4b7dc49 | 124 | * |
a6e0887f LB |
125 | * So "Linux" turned out to be a really poor chose of |
126 | * OSI string, and from Linux-2.6.23 onward we respond FALSE. | |
d4b7dc49 LB |
127 | * |
128 | * BIOS writers should NOT query _OSI(Linux) on future systems. | |
a6e0887f LB |
129 | * Linux will complain on the console when it sees it, and return FALSE. |
130 | * To get Linux to return TRUE for your system will require | |
131 | * a kernel source update to add a DMI entry, | |
132 | * or boot with "acpi_osi=Linux" | |
d4b7dc49 | 133 | */ |
d4b7dc49 | 134 | |
1d15d84e | 135 | static struct osi_linux { |
d4b7dc49 LB |
136 | unsigned int enable:1; |
137 | unsigned int dmi:1; | |
138 | unsigned int cmdline:1; | |
5dc17986 LZ |
139 | unsigned int default_disabling:1; |
140 | } osi_linux = {0, 0, 0, 0}; | |
f507654d | 141 | |
b0ed7a91 LM |
142 | static u32 acpi_osi_handler(acpi_string interface, u32 supported) |
143 | { | |
144 | if (!strcmp("Linux", interface)) { | |
145 | ||
8997621b | 146 | printk_once(KERN_NOTICE FW_BUG PREFIX |
b0ed7a91 LM |
147 | "BIOS _OSI(Linux) query %s%s\n", |
148 | osi_linux.enable ? "honored" : "ignored", | |
149 | osi_linux.cmdline ? " via cmdline" : | |
150 | osi_linux.dmi ? " via DMI" : ""); | |
151 | } | |
152 | ||
7bc5a2ba MG |
153 | if (!strcmp("Darwin", interface)) { |
154 | /* | |
155 | * Apple firmware will behave poorly if it receives positive | |
156 | * answers to "Darwin" and any other OS. Respond positively | |
157 | * to Darwin and then disable all other vendor strings. | |
158 | */ | |
159 | acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS); | |
160 | supported = ACPI_UINT32_MAX; | |
161 | } | |
162 | ||
b0ed7a91 LM |
163 | return supported; |
164 | } | |
165 | ||
bc9ffce2 | 166 | static void __init acpi_request_region (struct acpi_generic_address *gas, |
9a47cdb1 BH |
167 | unsigned int length, char *desc) |
168 | { | |
bc9ffce2 MS |
169 | u64 addr; |
170 | ||
171 | /* Handle possible alignment issues */ | |
172 | memcpy(&addr, &gas->address, sizeof(addr)); | |
173 | if (!addr || !length) | |
9a47cdb1 BH |
174 | return; |
175 | ||
0294112e RW |
176 | /* Resources are never freed */ |
177 | if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_IO) | |
178 | request_region(addr, length, desc); | |
179 | else if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) | |
180 | request_mem_region(addr, length, desc); | |
9a47cdb1 BH |
181 | } |
182 | ||
0294112e | 183 | static int __init acpi_reserve_resources(void) |
9a47cdb1 | 184 | { |
eee3c859 | 185 | acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
186 | "ACPI PM1a_EVT_BLK"); |
187 | ||
eee3c859 | 188 | acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
189 | "ACPI PM1b_EVT_BLK"); |
190 | ||
eee3c859 | 191 | acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
192 | "ACPI PM1a_CNT_BLK"); |
193 | ||
eee3c859 | 194 | acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
195 | "ACPI PM1b_CNT_BLK"); |
196 | ||
eee3c859 LB |
197 | if (acpi_gbl_FADT.pm_timer_length == 4) |
198 | acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR"); | |
9a47cdb1 | 199 | |
eee3c859 | 200 | acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length, |
9a47cdb1 BH |
201 | "ACPI PM2_CNT_BLK"); |
202 | ||
203 | /* Length of GPE blocks must be a non-negative multiple of 2 */ | |
204 | ||
eee3c859 LB |
205 | if (!(acpi_gbl_FADT.gpe0_block_length & 0x1)) |
206 | acpi_request_region(&acpi_gbl_FADT.xgpe0_block, | |
207 | acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK"); | |
9a47cdb1 | 208 | |
eee3c859 LB |
209 | if (!(acpi_gbl_FADT.gpe1_block_length & 0x1)) |
210 | acpi_request_region(&acpi_gbl_FADT.xgpe1_block, | |
211 | acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK"); | |
0294112e RW |
212 | |
213 | return 0; | |
9a47cdb1 | 214 | } |
0294112e | 215 | fs_initcall_sync(acpi_reserve_resources); |
9a47cdb1 | 216 | |
4be44fcd | 217 | void acpi_os_printf(const char *fmt, ...) |
1da177e4 LT |
218 | { |
219 | va_list args; | |
220 | va_start(args, fmt); | |
221 | acpi_os_vprintf(fmt, args); | |
222 | va_end(args); | |
223 | } | |
4be44fcd | 224 | |
4be44fcd | 225 | void acpi_os_vprintf(const char *fmt, va_list args) |
1da177e4 LT |
226 | { |
227 | static char buffer[512]; | |
4be44fcd | 228 | |
1da177e4 LT |
229 | vsprintf(buffer, fmt, args); |
230 | ||
231 | #ifdef ENABLE_DEBUGGER | |
232 | if (acpi_in_debugger) { | |
233 | kdb_printf("%s", buffer); | |
234 | } else { | |
4d939155 | 235 | printk(KERN_CONT "%s", buffer); |
1da177e4 LT |
236 | } |
237 | #else | |
4d939155 | 238 | printk(KERN_CONT "%s", buffer); |
1da177e4 LT |
239 | #endif |
240 | } | |
241 | ||
4996c023 TI |
242 | #ifdef CONFIG_KEXEC |
243 | static unsigned long acpi_rsdp; | |
244 | static int __init setup_acpi_rsdp(char *arg) | |
245 | { | |
3d915894 CJ |
246 | if (kstrtoul(arg, 16, &acpi_rsdp)) |
247 | return -EINVAL; | |
4996c023 TI |
248 | return 0; |
249 | } | |
250 | early_param("acpi_rsdp", setup_acpi_rsdp); | |
251 | #endif | |
252 | ||
ad71860a | 253 | acpi_physical_address __init acpi_os_get_root_pointer(void) |
1da177e4 | 254 | { |
4996c023 TI |
255 | #ifdef CONFIG_KEXEC |
256 | if (acpi_rsdp) | |
257 | return acpi_rsdp; | |
258 | #endif | |
259 | ||
83e68189 | 260 | if (efi_enabled(EFI_CONFIG_TABLES)) { |
b2c99e3c | 261 | if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) |
ad71860a | 262 | return efi.acpi20; |
b2c99e3c | 263 | else if (efi.acpi != EFI_INVALID_TABLE_ADDR) |
ad71860a | 264 | return efi.acpi; |
1da177e4 | 265 | else { |
4be44fcd LB |
266 | printk(KERN_ERR PREFIX |
267 | "System description tables not found\n"); | |
ad71860a | 268 | return 0; |
1da177e4 | 269 | } |
8a1664be | 270 | } else if (IS_ENABLED(CONFIG_ACPI_LEGACY_TABLES_LOOKUP)) { |
239665a3 LB |
271 | acpi_physical_address pa = 0; |
272 | ||
273 | acpi_find_root_pointer(&pa); | |
274 | return pa; | |
275 | } | |
8a1664be GG |
276 | |
277 | return 0; | |
1da177e4 LT |
278 | } |
279 | ||
78cdb3ed | 280 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ |
4a3cba5e MS |
281 | static struct acpi_ioremap * |
282 | acpi_map_lookup(acpi_physical_address phys, acpi_size size) | |
620242ae MS |
283 | { |
284 | struct acpi_ioremap *map; | |
285 | ||
78cdb3ed | 286 | list_for_each_entry_rcu(map, &acpi_ioremaps, list) |
620242ae MS |
287 | if (map->phys <= phys && |
288 | phys + size <= map->phys + map->size) | |
4a3cba5e MS |
289 | return map; |
290 | ||
291 | return NULL; | |
292 | } | |
293 | ||
294 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ | |
295 | static void __iomem * | |
296 | acpi_map_vaddr_lookup(acpi_physical_address phys, unsigned int size) | |
297 | { | |
298 | struct acpi_ioremap *map; | |
299 | ||
300 | map = acpi_map_lookup(phys, size); | |
301 | if (map) | |
302 | return map->virt + (phys - map->phys); | |
620242ae MS |
303 | |
304 | return NULL; | |
305 | } | |
306 | ||
13606a2d RW |
307 | void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size) |
308 | { | |
309 | struct acpi_ioremap *map; | |
310 | void __iomem *virt = NULL; | |
311 | ||
312 | mutex_lock(&acpi_ioremap_lock); | |
313 | map = acpi_map_lookup(phys, size); | |
314 | if (map) { | |
315 | virt = map->virt + (phys - map->phys); | |
316 | map->refcount++; | |
317 | } | |
318 | mutex_unlock(&acpi_ioremap_lock); | |
319 | return virt; | |
320 | } | |
321 | EXPORT_SYMBOL_GPL(acpi_os_get_iomem); | |
322 | ||
78cdb3ed | 323 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ |
620242ae MS |
324 | static struct acpi_ioremap * |
325 | acpi_map_lookup_virt(void __iomem *virt, acpi_size size) | |
326 | { | |
327 | struct acpi_ioremap *map; | |
328 | ||
78cdb3ed | 329 | list_for_each_entry_rcu(map, &acpi_ioremaps, list) |
4a3cba5e MS |
330 | if (map->virt <= virt && |
331 | virt + size <= map->virt + map->size) | |
620242ae MS |
332 | return map; |
333 | ||
334 | return NULL; | |
335 | } | |
336 | ||
aafc65c7 | 337 | #if defined(CONFIG_IA64) || defined(CONFIG_ARM64) |
ba242d5b MS |
338 | /* ioremap will take care of cache attributes */ |
339 | #define should_use_kmap(pfn) 0 | |
aafc65c7 GG |
340 | #else |
341 | #define should_use_kmap(pfn) page_is_ram(pfn) | |
ba242d5b MS |
342 | #endif |
343 | ||
344 | static void __iomem *acpi_map(acpi_physical_address pg_off, unsigned long pg_sz) | |
345 | { | |
346 | unsigned long pfn; | |
347 | ||
348 | pfn = pg_off >> PAGE_SHIFT; | |
349 | if (should_use_kmap(pfn)) { | |
350 | if (pg_sz > PAGE_SIZE) | |
351 | return NULL; | |
352 | return (void __iomem __force *)kmap(pfn_to_page(pfn)); | |
353 | } else | |
354 | return acpi_os_ioremap(pg_off, pg_sz); | |
355 | } | |
356 | ||
357 | static void acpi_unmap(acpi_physical_address pg_off, void __iomem *vaddr) | |
358 | { | |
359 | unsigned long pfn; | |
360 | ||
361 | pfn = pg_off >> PAGE_SHIFT; | |
e252675f | 362 | if (should_use_kmap(pfn)) |
ba242d5b MS |
363 | kunmap(pfn_to_page(pfn)); |
364 | else | |
365 | iounmap(vaddr); | |
366 | } | |
367 | ||
2fdf0741 | 368 | void __iomem *__init_refok |
a238317c | 369 | acpi_os_map_iomem(acpi_physical_address phys, acpi_size size) |
1da177e4 | 370 | { |
7ffd0443 | 371 | struct acpi_ioremap *map; |
620242ae | 372 | void __iomem *virt; |
2d6d9fd3 RW |
373 | acpi_physical_address pg_off; |
374 | acpi_size pg_sz; | |
620242ae | 375 | |
9f4fd61f BH |
376 | if (phys > ULONG_MAX) { |
377 | printk(KERN_ERR PREFIX "Cannot map memory that high\n"); | |
70c0846e | 378 | return NULL; |
1da177e4 | 379 | } |
620242ae MS |
380 | |
381 | if (!acpi_gbl_permanent_mmap) | |
ad71860a | 382 | return __acpi_map_table((unsigned long)phys, size); |
620242ae | 383 | |
7ffd0443 RW |
384 | mutex_lock(&acpi_ioremap_lock); |
385 | /* Check if there's a suitable mapping already. */ | |
386 | map = acpi_map_lookup(phys, size); | |
387 | if (map) { | |
b7c1fadd | 388 | map->refcount++; |
7ffd0443 RW |
389 | goto out; |
390 | } | |
391 | ||
620242ae | 392 | map = kzalloc(sizeof(*map), GFP_KERNEL); |
7ffd0443 RW |
393 | if (!map) { |
394 | mutex_unlock(&acpi_ioremap_lock); | |
620242ae | 395 | return NULL; |
7ffd0443 | 396 | } |
620242ae | 397 | |
4a3cba5e MS |
398 | pg_off = round_down(phys, PAGE_SIZE); |
399 | pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off; | |
ba242d5b | 400 | virt = acpi_map(pg_off, pg_sz); |
620242ae | 401 | if (!virt) { |
7ffd0443 | 402 | mutex_unlock(&acpi_ioremap_lock); |
620242ae MS |
403 | kfree(map); |
404 | return NULL; | |
405 | } | |
406 | ||
407 | INIT_LIST_HEAD(&map->list); | |
408 | map->virt = virt; | |
4a3cba5e MS |
409 | map->phys = pg_off; |
410 | map->size = pg_sz; | |
b7c1fadd | 411 | map->refcount = 1; |
620242ae | 412 | |
78cdb3ed | 413 | list_add_tail_rcu(&map->list, &acpi_ioremaps); |
620242ae | 414 | |
a238317c | 415 | out: |
7ffd0443 | 416 | mutex_unlock(&acpi_ioremap_lock); |
4a3cba5e | 417 | return map->virt + (phys - map->phys); |
1da177e4 | 418 | } |
a238317c LZ |
419 | EXPORT_SYMBOL_GPL(acpi_os_map_iomem); |
420 | ||
421 | void *__init_refok | |
422 | acpi_os_map_memory(acpi_physical_address phys, acpi_size size) | |
423 | { | |
424 | return (void *)acpi_os_map_iomem(phys, size); | |
425 | } | |
55a82ab3 | 426 | EXPORT_SYMBOL_GPL(acpi_os_map_memory); |
1da177e4 | 427 | |
b7c1fadd | 428 | static void acpi_os_drop_map_ref(struct acpi_ioremap *map) |
4a3cba5e | 429 | { |
b7c1fadd RW |
430 | if (!--map->refcount) |
431 | list_del_rcu(&map->list); | |
4a3cba5e | 432 | } |
4a3cba5e | 433 | |
b7c1fadd | 434 | static void acpi_os_map_cleanup(struct acpi_ioremap *map) |
7fe135dc | 435 | { |
b7c1fadd | 436 | if (!map->refcount) { |
74b51ee1 | 437 | synchronize_rcu_expedited(); |
ba242d5b | 438 | acpi_unmap(map->phys, map->virt); |
b7c1fadd RW |
439 | kfree(map); |
440 | } | |
4a3cba5e MS |
441 | } |
442 | ||
a238317c | 443 | void __ref acpi_os_unmap_iomem(void __iomem *virt, acpi_size size) |
1da177e4 | 444 | { |
620242ae | 445 | struct acpi_ioremap *map; |
620242ae MS |
446 | |
447 | if (!acpi_gbl_permanent_mmap) { | |
7d97277b | 448 | __acpi_unmap_table(virt, size); |
620242ae MS |
449 | return; |
450 | } | |
451 | ||
7bbb8903 | 452 | mutex_lock(&acpi_ioremap_lock); |
620242ae MS |
453 | map = acpi_map_lookup_virt(virt, size); |
454 | if (!map) { | |
7bbb8903 | 455 | mutex_unlock(&acpi_ioremap_lock); |
7fe135dc | 456 | WARN(true, PREFIX "%s: bad address %p\n", __func__, virt); |
620242ae MS |
457 | return; |
458 | } | |
b7c1fadd | 459 | acpi_os_drop_map_ref(map); |
7bbb8903 | 460 | mutex_unlock(&acpi_ioremap_lock); |
620242ae | 461 | |
b7c1fadd | 462 | acpi_os_map_cleanup(map); |
1da177e4 | 463 | } |
a238317c LZ |
464 | EXPORT_SYMBOL_GPL(acpi_os_unmap_iomem); |
465 | ||
466 | void __ref acpi_os_unmap_memory(void *virt, acpi_size size) | |
467 | { | |
468 | return acpi_os_unmap_iomem((void __iomem *)virt, size); | |
469 | } | |
55a82ab3 | 470 | EXPORT_SYMBOL_GPL(acpi_os_unmap_memory); |
1da177e4 | 471 | |
0d3a9cf5 | 472 | void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size) |
7d97277b YL |
473 | { |
474 | if (!acpi_gbl_permanent_mmap) | |
475 | __acpi_unmap_table(virt, size); | |
476 | } | |
477 | ||
6f68c91c | 478 | int acpi_os_map_generic_address(struct acpi_generic_address *gas) |
29718521 | 479 | { |
bc9ffce2 | 480 | u64 addr; |
29718521 MS |
481 | void __iomem *virt; |
482 | ||
bc9ffce2 | 483 | if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) |
29718521 MS |
484 | return 0; |
485 | ||
bc9ffce2 MS |
486 | /* Handle possible alignment issues */ |
487 | memcpy(&addr, &gas->address, sizeof(addr)); | |
488 | if (!addr || !gas->bit_width) | |
29718521 MS |
489 | return -EINVAL; |
490 | ||
a238317c | 491 | virt = acpi_os_map_iomem(addr, gas->bit_width / 8); |
29718521 MS |
492 | if (!virt) |
493 | return -EIO; | |
494 | ||
495 | return 0; | |
496 | } | |
6f68c91c | 497 | EXPORT_SYMBOL(acpi_os_map_generic_address); |
29718521 | 498 | |
6f68c91c | 499 | void acpi_os_unmap_generic_address(struct acpi_generic_address *gas) |
29718521 | 500 | { |
bc9ffce2 | 501 | u64 addr; |
7fe135dc | 502 | struct acpi_ioremap *map; |
29718521 | 503 | |
bc9ffce2 | 504 | if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) |
29718521 MS |
505 | return; |
506 | ||
bc9ffce2 MS |
507 | /* Handle possible alignment issues */ |
508 | memcpy(&addr, &gas->address, sizeof(addr)); | |
509 | if (!addr || !gas->bit_width) | |
29718521 MS |
510 | return; |
511 | ||
7bbb8903 | 512 | mutex_lock(&acpi_ioremap_lock); |
bc9ffce2 | 513 | map = acpi_map_lookup(addr, gas->bit_width / 8); |
7fe135dc RW |
514 | if (!map) { |
515 | mutex_unlock(&acpi_ioremap_lock); | |
516 | return; | |
517 | } | |
b7c1fadd | 518 | acpi_os_drop_map_ref(map); |
7bbb8903 | 519 | mutex_unlock(&acpi_ioremap_lock); |
29718521 | 520 | |
b7c1fadd | 521 | acpi_os_map_cleanup(map); |
29718521 | 522 | } |
6f68c91c | 523 | EXPORT_SYMBOL(acpi_os_unmap_generic_address); |
29718521 | 524 | |
1da177e4 LT |
525 | #ifdef ACPI_FUTURE_USAGE |
526 | acpi_status | |
4be44fcd | 527 | acpi_os_get_physical_address(void *virt, acpi_physical_address * phys) |
1da177e4 | 528 | { |
4be44fcd | 529 | if (!phys || !virt) |
1da177e4 LT |
530 | return AE_BAD_PARAMETER; |
531 | ||
532 | *phys = virt_to_phys(virt); | |
533 | ||
534 | return AE_OK; | |
535 | } | |
536 | #endif | |
537 | ||
18d78b64 RW |
538 | #ifdef CONFIG_ACPI_REV_OVERRIDE_POSSIBLE |
539 | static bool acpi_rev_override; | |
540 | ||
541 | int __init acpi_rev_override_setup(char *str) | |
542 | { | |
543 | acpi_rev_override = true; | |
544 | return 1; | |
545 | } | |
546 | __setup("acpi_rev_override", acpi_rev_override_setup); | |
547 | #else | |
548 | #define acpi_rev_override false | |
549 | #endif | |
550 | ||
1da177e4 LT |
551 | #define ACPI_MAX_OVERRIDE_LEN 100 |
552 | ||
553 | static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN]; | |
554 | ||
555 | acpi_status | |
4be44fcd | 556 | acpi_os_predefined_override(const struct acpi_predefined_names *init_val, |
2bad7e27 | 557 | char **new_val) |
1da177e4 LT |
558 | { |
559 | if (!init_val || !new_val) | |
560 | return AE_BAD_PARAMETER; | |
561 | ||
562 | *new_val = NULL; | |
4be44fcd | 563 | if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) { |
1da177e4 | 564 | printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n", |
4be44fcd | 565 | acpi_os_name); |
1da177e4 LT |
566 | *new_val = acpi_os_name; |
567 | } | |
568 | ||
18d78b64 RW |
569 | if (!memcmp(init_val->name, "_REV", 4) && acpi_rev_override) { |
570 | printk(KERN_INFO PREFIX "Overriding _REV return value to 5\n"); | |
571 | *new_val = (char *)5; | |
572 | } | |
573 | ||
1da177e4 LT |
574 | return AE_OK; |
575 | } | |
576 | ||
53aac44c TR |
577 | #ifdef CONFIG_ACPI_INITRD_TABLE_OVERRIDE |
578 | #include <linux/earlycpio.h> | |
579 | #include <linux/memblock.h> | |
580 | ||
581 | static u64 acpi_tables_addr; | |
582 | static int all_tables_size; | |
583 | ||
584 | /* Copied from acpica/tbutils.c:acpi_tb_checksum() */ | |
66e162b3 | 585 | static u8 __init acpi_table_checksum(u8 *buffer, u32 length) |
53aac44c TR |
586 | { |
587 | u8 sum = 0; | |
588 | u8 *end = buffer + length; | |
589 | ||
590 | while (buffer < end) | |
591 | sum = (u8) (sum + *(buffer++)); | |
592 | return sum; | |
593 | } | |
594 | ||
595 | /* All but ACPI_SIG_RSDP and ACPI_SIG_FACS: */ | |
596 | static const char * const table_sigs[] = { | |
597 | ACPI_SIG_BERT, ACPI_SIG_CPEP, ACPI_SIG_ECDT, ACPI_SIG_EINJ, | |
598 | ACPI_SIG_ERST, ACPI_SIG_HEST, ACPI_SIG_MADT, ACPI_SIG_MSCT, | |
599 | ACPI_SIG_SBST, ACPI_SIG_SLIT, ACPI_SIG_SRAT, ACPI_SIG_ASF, | |
600 | ACPI_SIG_BOOT, ACPI_SIG_DBGP, ACPI_SIG_DMAR, ACPI_SIG_HPET, | |
601 | ACPI_SIG_IBFT, ACPI_SIG_IVRS, ACPI_SIG_MCFG, ACPI_SIG_MCHI, | |
602 | ACPI_SIG_SLIC, ACPI_SIG_SPCR, ACPI_SIG_SPMI, ACPI_SIG_TCPA, | |
603 | ACPI_SIG_UEFI, ACPI_SIG_WAET, ACPI_SIG_WDAT, ACPI_SIG_WDDT, | |
604 | ACPI_SIG_WDRT, ACPI_SIG_DSDT, ACPI_SIG_FADT, ACPI_SIG_PSDT, | |
605 | ACPI_SIG_RSDT, ACPI_SIG_XSDT, ACPI_SIG_SSDT, NULL }; | |
606 | ||
53aac44c TR |
607 | #define ACPI_HEADER_SIZE sizeof(struct acpi_table_header) |
608 | ||
bee7f9c8 YL |
609 | #define ACPI_OVERRIDE_TABLES 64 |
610 | static struct cpio_data __initdata acpi_initrd_files[ACPI_OVERRIDE_TABLES]; | |
611 | ||
612 | #define MAP_CHUNK_SIZE (NR_FIX_BTMAPS << PAGE_SHIFT) | |
53aac44c TR |
613 | |
614 | void __init acpi_initrd_override(void *data, size_t size) | |
615 | { | |
616 | int sig, no, table_nr = 0, total_offset = 0; | |
617 | long offset = 0; | |
618 | struct acpi_table_header *table; | |
619 | char cpio_path[32] = "kernel/firmware/acpi/"; | |
620 | struct cpio_data file; | |
53aac44c TR |
621 | |
622 | if (data == NULL || size == 0) | |
623 | return; | |
624 | ||
625 | for (no = 0; no < ACPI_OVERRIDE_TABLES; no++) { | |
626 | file = find_cpio_data(cpio_path, data, size, &offset); | |
627 | if (!file.data) | |
628 | break; | |
629 | ||
630 | data += offset; | |
631 | size -= offset; | |
632 | ||
7702ae0d TC |
633 | if (file.size < sizeof(struct acpi_table_header)) { |
634 | pr_err("ACPI OVERRIDE: Table smaller than ACPI header [%s%s]\n", | |
635 | cpio_path, file.name); | |
636 | continue; | |
637 | } | |
53aac44c TR |
638 | |
639 | table = file.data; | |
640 | ||
641 | for (sig = 0; table_sigs[sig]; sig++) | |
642 | if (!memcmp(table->signature, table_sigs[sig], 4)) | |
643 | break; | |
644 | ||
7702ae0d TC |
645 | if (!table_sigs[sig]) { |
646 | pr_err("ACPI OVERRIDE: Unknown signature [%s%s]\n", | |
647 | cpio_path, file.name); | |
648 | continue; | |
649 | } | |
650 | if (file.size != table->length) { | |
651 | pr_err("ACPI OVERRIDE: File length does not match table length [%s%s]\n", | |
652 | cpio_path, file.name); | |
653 | continue; | |
654 | } | |
655 | if (acpi_table_checksum(file.data, table->length)) { | |
656 | pr_err("ACPI OVERRIDE: Bad table checksum [%s%s]\n", | |
657 | cpio_path, file.name); | |
658 | continue; | |
659 | } | |
53aac44c TR |
660 | |
661 | pr_info("%4.4s ACPI table found in initrd [%s%s][0x%x]\n", | |
662 | table->signature, cpio_path, file.name, table->length); | |
663 | ||
664 | all_tables_size += table->length; | |
bee7f9c8 YL |
665 | acpi_initrd_files[table_nr].data = file.data; |
666 | acpi_initrd_files[table_nr].size = file.size; | |
53aac44c TR |
667 | table_nr++; |
668 | } | |
669 | if (table_nr == 0) | |
670 | return; | |
671 | ||
672 | acpi_tables_addr = | |
673 | memblock_find_in_range(0, max_low_pfn_mapped << PAGE_SHIFT, | |
674 | all_tables_size, PAGE_SIZE); | |
675 | if (!acpi_tables_addr) { | |
676 | WARN_ON(1); | |
677 | return; | |
678 | } | |
679 | /* | |
680 | * Only calling e820_add_reserve does not work and the | |
681 | * tables are invalid (memory got used) later. | |
682 | * memblock_reserve works as expected and the tables won't get modified. | |
683 | * But it's not enough on X86 because ioremap will | |
684 | * complain later (used by acpi_os_map_memory) that the pages | |
685 | * that should get mapped are not marked "reserved". | |
686 | * Both memblock_reserve and e820_add_region (via arch_reserve_mem_area) | |
687 | * works fine. | |
688 | */ | |
a6432ded | 689 | memblock_reserve(acpi_tables_addr, all_tables_size); |
53aac44c TR |
690 | arch_reserve_mem_area(acpi_tables_addr, all_tables_size); |
691 | ||
bee7f9c8 YL |
692 | /* |
693 | * early_ioremap only can remap 256k one time. If we map all | |
694 | * tables one time, we will hit the limit. Need to map chunks | |
695 | * one by one during copying the same as that in relocate_initrd(). | |
696 | */ | |
53aac44c | 697 | for (no = 0; no < table_nr; no++) { |
bee7f9c8 YL |
698 | unsigned char *src_p = acpi_initrd_files[no].data; |
699 | phys_addr_t size = acpi_initrd_files[no].size; | |
700 | phys_addr_t dest_addr = acpi_tables_addr + total_offset; | |
701 | phys_addr_t slop, clen; | |
702 | char *dest_p; | |
703 | ||
704 | total_offset += size; | |
705 | ||
706 | while (size) { | |
707 | slop = dest_addr & ~PAGE_MASK; | |
708 | clen = size; | |
709 | if (clen > MAP_CHUNK_SIZE - slop) | |
710 | clen = MAP_CHUNK_SIZE - slop; | |
711 | dest_p = early_ioremap(dest_addr & PAGE_MASK, | |
712 | clen + slop); | |
713 | memcpy(dest_p + slop, src_p, clen); | |
714 | early_iounmap(dest_p, clen + slop); | |
715 | src_p += clen; | |
716 | dest_addr += clen; | |
717 | size -= clen; | |
718 | } | |
53aac44c | 719 | } |
53aac44c TR |
720 | } |
721 | #endif /* CONFIG_ACPI_INITRD_TABLE_OVERRIDE */ | |
722 | ||
325a8d36 TR |
723 | static void acpi_table_taint(struct acpi_table_header *table) |
724 | { | |
725 | pr_warn(PREFIX | |
726 | "Override [%4.4s-%8.8s], this is unsafe: tainting kernel\n", | |
727 | table->signature, table->oem_table_id); | |
373d4d09 | 728 | add_taint(TAINT_OVERRIDDEN_ACPI_TABLE, LOCKDEP_NOW_UNRELIABLE); |
325a8d36 TR |
729 | } |
730 | ||
731 | ||
1da177e4 | 732 | acpi_status |
4be44fcd LB |
733 | acpi_os_table_override(struct acpi_table_header * existing_table, |
734 | struct acpi_table_header ** new_table) | |
1da177e4 LT |
735 | { |
736 | if (!existing_table || !new_table) | |
737 | return AE_BAD_PARAMETER; | |
738 | ||
71fc47a9 MG |
739 | *new_table = NULL; |
740 | ||
1da177e4 LT |
741 | #ifdef CONFIG_ACPI_CUSTOM_DSDT |
742 | if (strncmp(existing_table->signature, "DSDT", 4) == 0) | |
4be44fcd | 743 | *new_table = (struct acpi_table_header *)AmlCode; |
1da177e4 | 744 | #endif |
325a8d36 TR |
745 | if (*new_table != NULL) |
746 | acpi_table_taint(existing_table); | |
1da177e4 LT |
747 | return AE_OK; |
748 | } | |
749 | ||
f7b004a1 BM |
750 | acpi_status |
751 | acpi_os_physical_table_override(struct acpi_table_header *existing_table, | |
b2a35003 TR |
752 | acpi_physical_address *address, |
753 | u32 *table_length) | |
f7b004a1 | 754 | { |
b2a35003 TR |
755 | #ifndef CONFIG_ACPI_INITRD_TABLE_OVERRIDE |
756 | *table_length = 0; | |
757 | *address = 0; | |
758 | return AE_OK; | |
759 | #else | |
760 | int table_offset = 0; | |
761 | struct acpi_table_header *table; | |
762 | ||
763 | *table_length = 0; | |
764 | *address = 0; | |
765 | ||
766 | if (!acpi_tables_addr) | |
767 | return AE_OK; | |
768 | ||
769 | do { | |
770 | if (table_offset + ACPI_HEADER_SIZE > all_tables_size) { | |
771 | WARN_ON(1); | |
772 | return AE_OK; | |
773 | } | |
774 | ||
775 | table = acpi_os_map_memory(acpi_tables_addr + table_offset, | |
776 | ACPI_HEADER_SIZE); | |
f7b004a1 | 777 | |
b2a35003 TR |
778 | if (table_offset + table->length > all_tables_size) { |
779 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
780 | WARN_ON(1); | |
781 | return AE_OK; | |
782 | } | |
783 | ||
784 | table_offset += table->length; | |
785 | ||
786 | if (memcmp(existing_table->signature, table->signature, 4)) { | |
787 | acpi_os_unmap_memory(table, | |
788 | ACPI_HEADER_SIZE); | |
789 | continue; | |
790 | } | |
791 | ||
792 | /* Only override tables with matching oem id */ | |
793 | if (memcmp(table->oem_table_id, existing_table->oem_table_id, | |
794 | ACPI_OEM_TABLE_ID_SIZE)) { | |
795 | acpi_os_unmap_memory(table, | |
796 | ACPI_HEADER_SIZE); | |
797 | continue; | |
798 | } | |
799 | ||
800 | table_offset -= table->length; | |
801 | *table_length = table->length; | |
802 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
803 | *address = acpi_tables_addr + table_offset; | |
804 | break; | |
805 | } while (table_offset + ACPI_HEADER_SIZE < all_tables_size); | |
f7b004a1 | 806 | |
325a8d36 TR |
807 | if (*address != 0) |
808 | acpi_table_taint(existing_table); | |
b2a35003 TR |
809 | return AE_OK; |
810 | #endif | |
811 | } | |
f7b004a1 | 812 | |
7d12e780 | 813 | static irqreturn_t acpi_irq(int irq, void *dev_id) |
1da177e4 | 814 | { |
5229e87d LB |
815 | u32 handled; |
816 | ||
817 | handled = (*acpi_irq_handler) (acpi_irq_context); | |
818 | ||
819 | if (handled) { | |
820 | acpi_irq_handled++; | |
821 | return IRQ_HANDLED; | |
88bea188 LB |
822 | } else { |
823 | acpi_irq_not_handled++; | |
5229e87d | 824 | return IRQ_NONE; |
88bea188 | 825 | } |
1da177e4 LT |
826 | } |
827 | ||
828 | acpi_status | |
4be44fcd LB |
829 | acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler, |
830 | void *context) | |
1da177e4 LT |
831 | { |
832 | unsigned int irq; | |
833 | ||
5229e87d LB |
834 | acpi_irq_stats_init(); |
835 | ||
1da177e4 | 836 | /* |
23fe3630 RW |
837 | * ACPI interrupts different from the SCI in our copy of the FADT are |
838 | * not supported. | |
1da177e4 | 839 | */ |
23fe3630 RW |
840 | if (gsi != acpi_gbl_FADT.sci_interrupt) |
841 | return AE_BAD_PARAMETER; | |
842 | ||
843 | if (acpi_irq_handler) | |
844 | return AE_ALREADY_ACQUIRED; | |
845 | ||
1da177e4 LT |
846 | if (acpi_gsi_to_irq(gsi, &irq) < 0) { |
847 | printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n", | |
848 | gsi); | |
849 | return AE_OK; | |
850 | } | |
851 | ||
852 | acpi_irq_handler = handler; | |
853 | acpi_irq_context = context; | |
a8d46b9e | 854 | if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) { |
1da177e4 | 855 | printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq); |
23fe3630 | 856 | acpi_irq_handler = NULL; |
1da177e4 LT |
857 | return AE_NOT_ACQUIRED; |
858 | } | |
1da177e4 LT |
859 | |
860 | return AE_OK; | |
861 | } | |
862 | ||
4be44fcd | 863 | acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler) |
1da177e4 | 864 | { |
23fe3630 RW |
865 | if (irq != acpi_gbl_FADT.sci_interrupt) |
866 | return AE_BAD_PARAMETER; | |
867 | ||
868 | free_irq(irq, acpi_irq); | |
869 | acpi_irq_handler = NULL; | |
1da177e4 LT |
870 | |
871 | return AE_OK; | |
872 | } | |
873 | ||
874 | /* | |
875 | * Running in interpreter thread context, safe to sleep | |
876 | */ | |
877 | ||
439913ff | 878 | void acpi_os_sleep(u64 ms) |
1da177e4 | 879 | { |
30282299 | 880 | msleep(ms); |
1da177e4 | 881 | } |
4be44fcd | 882 | |
4be44fcd | 883 | void acpi_os_stall(u32 us) |
1da177e4 LT |
884 | { |
885 | while (us) { | |
886 | u32 delay = 1000; | |
887 | ||
888 | if (delay > us) | |
889 | delay = us; | |
890 | udelay(delay); | |
891 | touch_nmi_watchdog(); | |
892 | us -= delay; | |
893 | } | |
894 | } | |
4be44fcd | 895 | |
1da177e4 LT |
896 | /* |
897 | * Support ACPI 3.0 AML Timer operand | |
898 | * Returns 64-bit free-running, monotonically increasing timer | |
899 | * with 100ns granularity | |
900 | */ | |
4be44fcd | 901 | u64 acpi_os_get_timer(void) |
1da177e4 | 902 | { |
10619066 MW |
903 | u64 time_ns = ktime_to_ns(ktime_get()); |
904 | do_div(time_ns, 100); | |
905 | return time_ns; | |
1da177e4 LT |
906 | } |
907 | ||
4be44fcd | 908 | acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width) |
1da177e4 LT |
909 | { |
910 | u32 dummy; | |
911 | ||
912 | if (!value) | |
913 | value = &dummy; | |
914 | ||
49fbabf5 ZY |
915 | *value = 0; |
916 | if (width <= 8) { | |
4be44fcd | 917 | *(u8 *) value = inb(port); |
49fbabf5 | 918 | } else if (width <= 16) { |
4be44fcd | 919 | *(u16 *) value = inw(port); |
49fbabf5 | 920 | } else if (width <= 32) { |
4be44fcd | 921 | *(u32 *) value = inl(port); |
49fbabf5 | 922 | } else { |
1da177e4 LT |
923 | BUG(); |
924 | } | |
925 | ||
926 | return AE_OK; | |
927 | } | |
4be44fcd | 928 | |
1da177e4 LT |
929 | EXPORT_SYMBOL(acpi_os_read_port); |
930 | ||
4be44fcd | 931 | acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width) |
1da177e4 | 932 | { |
49fbabf5 | 933 | if (width <= 8) { |
1da177e4 | 934 | outb(value, port); |
49fbabf5 | 935 | } else if (width <= 16) { |
1da177e4 | 936 | outw(value, port); |
49fbabf5 | 937 | } else if (width <= 32) { |
1da177e4 | 938 | outl(value, port); |
49fbabf5 | 939 | } else { |
1da177e4 LT |
940 | BUG(); |
941 | } | |
942 | ||
943 | return AE_OK; | |
944 | } | |
4be44fcd | 945 | |
1da177e4 LT |
946 | EXPORT_SYMBOL(acpi_os_write_port); |
947 | ||
e615bf5b | 948 | acpi_status |
653f4b53 | 949 | acpi_os_read_memory(acpi_physical_address phys_addr, u64 *value, u32 width) |
e615bf5b MS |
950 | { |
951 | void __iomem *virt_addr; | |
952 | unsigned int size = width / 8; | |
953 | bool unmap = false; | |
954 | u64 dummy; | |
955 | ||
956 | rcu_read_lock(); | |
957 | virt_addr = acpi_map_vaddr_lookup(phys_addr, size); | |
958 | if (!virt_addr) { | |
959 | rcu_read_unlock(); | |
960 | virt_addr = acpi_os_ioremap(phys_addr, size); | |
961 | if (!virt_addr) | |
962 | return AE_BAD_ADDRESS; | |
963 | unmap = true; | |
964 | } | |
965 | ||
966 | if (!value) | |
967 | value = &dummy; | |
968 | ||
969 | switch (width) { | |
970 | case 8: | |
971 | *(u8 *) value = readb(virt_addr); | |
972 | break; | |
973 | case 16: | |
974 | *(u16 *) value = readw(virt_addr); | |
975 | break; | |
976 | case 32: | |
977 | *(u32 *) value = readl(virt_addr); | |
978 | break; | |
979 | case 64: | |
3277b4ea | 980 | *(u64 *) value = readq(virt_addr); |
e615bf5b MS |
981 | break; |
982 | default: | |
983 | BUG(); | |
984 | } | |
985 | ||
986 | if (unmap) | |
987 | iounmap(virt_addr); | |
988 | else | |
989 | rcu_read_unlock(); | |
990 | ||
991 | return AE_OK; | |
992 | } | |
993 | ||
e615bf5b | 994 | acpi_status |
653f4b53 | 995 | acpi_os_write_memory(acpi_physical_address phys_addr, u64 value, u32 width) |
e615bf5b MS |
996 | { |
997 | void __iomem *virt_addr; | |
998 | unsigned int size = width / 8; | |
999 | bool unmap = false; | |
1000 | ||
1001 | rcu_read_lock(); | |
1002 | virt_addr = acpi_map_vaddr_lookup(phys_addr, size); | |
1003 | if (!virt_addr) { | |
1004 | rcu_read_unlock(); | |
1005 | virt_addr = acpi_os_ioremap(phys_addr, size); | |
1006 | if (!virt_addr) | |
1007 | return AE_BAD_ADDRESS; | |
1008 | unmap = true; | |
1009 | } | |
1010 | ||
1011 | switch (width) { | |
1012 | case 8: | |
1013 | writeb(value, virt_addr); | |
1014 | break; | |
1015 | case 16: | |
1016 | writew(value, virt_addr); | |
1017 | break; | |
1018 | case 32: | |
1019 | writel(value, virt_addr); | |
1020 | break; | |
1021 | case 64: | |
3277b4ea | 1022 | writeq(value, virt_addr); |
e615bf5b MS |
1023 | break; |
1024 | default: | |
1025 | BUG(); | |
1026 | } | |
1027 | ||
1028 | if (unmap) | |
1029 | iounmap(virt_addr); | |
1030 | else | |
1031 | rcu_read_unlock(); | |
1032 | ||
1033 | return AE_OK; | |
1034 | } | |
1035 | ||
1da177e4 | 1036 | acpi_status |
4be44fcd | 1037 | acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
c5f0231e | 1038 | u64 *value, u32 width) |
1da177e4 LT |
1039 | { |
1040 | int result, size; | |
c5f0231e | 1041 | u32 value32; |
1da177e4 LT |
1042 | |
1043 | if (!value) | |
1044 | return AE_BAD_PARAMETER; | |
1045 | ||
1046 | switch (width) { | |
1047 | case 8: | |
1048 | size = 1; | |
1049 | break; | |
1050 | case 16: | |
1051 | size = 2; | |
1052 | break; | |
1053 | case 32: | |
1054 | size = 4; | |
1055 | break; | |
1056 | default: | |
1057 | return AE_ERROR; | |
1058 | } | |
1059 | ||
b6ce068a MW |
1060 | result = raw_pci_read(pci_id->segment, pci_id->bus, |
1061 | PCI_DEVFN(pci_id->device, pci_id->function), | |
c5f0231e BM |
1062 | reg, size, &value32); |
1063 | *value = value32; | |
1da177e4 LT |
1064 | |
1065 | return (result ? AE_ERROR : AE_OK); | |
1066 | } | |
4be44fcd | 1067 | |
1da177e4 | 1068 | acpi_status |
4be44fcd | 1069 | acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
439913ff | 1070 | u64 value, u32 width) |
1da177e4 LT |
1071 | { |
1072 | int result, size; | |
1073 | ||
1074 | switch (width) { | |
1075 | case 8: | |
1076 | size = 1; | |
1077 | break; | |
1078 | case 16: | |
1079 | size = 2; | |
1080 | break; | |
1081 | case 32: | |
1082 | size = 4; | |
1083 | break; | |
1084 | default: | |
1085 | return AE_ERROR; | |
1086 | } | |
1087 | ||
b6ce068a MW |
1088 | result = raw_pci_write(pci_id->segment, pci_id->bus, |
1089 | PCI_DEVFN(pci_id->device, pci_id->function), | |
1090 | reg, size, value); | |
1da177e4 LT |
1091 | |
1092 | return (result ? AE_ERROR : AE_OK); | |
1093 | } | |
1094 | ||
65f27f38 | 1095 | static void acpi_os_execute_deferred(struct work_struct *work) |
88db5e14 AS |
1096 | { |
1097 | struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work); | |
88db5e14 | 1098 | |
19cd847a ZR |
1099 | dpc->function(dpc->context); |
1100 | kfree(dpc); | |
19cd847a ZR |
1101 | } |
1102 | ||
b8d35192 AS |
1103 | /******************************************************************************* |
1104 | * | |
1105 | * FUNCTION: acpi_os_execute | |
1106 | * | |
1107 | * PARAMETERS: Type - Type of the callback | |
1108 | * Function - Function to be executed | |
1109 | * Context - Function parameters | |
1110 | * | |
1111 | * RETURN: Status | |
1112 | * | |
1113 | * DESCRIPTION: Depending on type, either queues function for deferred execution or | |
1114 | * immediately executes function on a separate thread. | |
1115 | * | |
1116 | ******************************************************************************/ | |
1117 | ||
7b98118a RW |
1118 | acpi_status acpi_os_execute(acpi_execute_type type, |
1119 | acpi_osd_exec_callback function, void *context) | |
1da177e4 | 1120 | { |
4be44fcd LB |
1121 | acpi_status status = AE_OK; |
1122 | struct acpi_os_dpc *dpc; | |
17bc54ee | 1123 | struct workqueue_struct *queue; |
19cd847a | 1124 | int ret; |
72945b2b LB |
1125 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
1126 | "Scheduling function [%p(%p)] for deferred execution.\n", | |
1127 | function, context)); | |
1da177e4 | 1128 | |
1da177e4 LT |
1129 | /* |
1130 | * Allocate/initialize DPC structure. Note that this memory will be | |
65f27f38 | 1131 | * freed by the callee. The kernel handles the work_struct list in a |
1da177e4 LT |
1132 | * way that allows us to also free its memory inside the callee. |
1133 | * Because we may want to schedule several tasks with different | |
1134 | * parameters we can't use the approach some kernel code uses of | |
65f27f38 | 1135 | * having a static work_struct. |
1da177e4 | 1136 | */ |
72945b2b | 1137 | |
3ae45a27 | 1138 | dpc = kzalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC); |
1da177e4 | 1139 | if (!dpc) |
889c78be | 1140 | return AE_NO_MEMORY; |
b976fe19 | 1141 | |
1da177e4 LT |
1142 | dpc->function = function; |
1143 | dpc->context = context; | |
b976fe19 | 1144 | |
c02256be | 1145 | /* |
3ae45a27 RW |
1146 | * To prevent lockdep from complaining unnecessarily, make sure that |
1147 | * there is a different static lockdep key for each workqueue by using | |
1148 | * INIT_WORK() for each of them separately. | |
c02256be | 1149 | */ |
7b98118a | 1150 | if (type == OSL_NOTIFY_HANDLER) { |
3ae45a27 | 1151 | queue = kacpi_notify_wq; |
bc73675b | 1152 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); |
3ae45a27 RW |
1153 | } else { |
1154 | queue = kacpid_wq; | |
bc73675b | 1155 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); |
3ae45a27 | 1156 | } |
bc73675b | 1157 | |
8fec62b2 TH |
1158 | /* |
1159 | * On some machines, a software-initiated SMI causes corruption unless | |
1160 | * the SMI runs on CPU 0. An SMI can be initiated by any AML, but | |
1161 | * typically it's done in GPE-related methods that are run via | |
1162 | * workqueues, so we can avoid the known corruption cases by always | |
1163 | * queueing on CPU 0. | |
1164 | */ | |
1165 | ret = queue_work_on(0, queue, &dpc->work); | |
19cd847a ZR |
1166 | |
1167 | if (!ret) { | |
55ac9a01 LM |
1168 | printk(KERN_ERR PREFIX |
1169 | "Call to queue_work() failed.\n"); | |
17bc54ee AS |
1170 | status = AE_ERROR; |
1171 | kfree(dpc); | |
1da177e4 | 1172 | } |
889c78be | 1173 | return status; |
1da177e4 | 1174 | } |
7b98118a | 1175 | EXPORT_SYMBOL(acpi_os_execute); |
4be44fcd | 1176 | |
7b98118a | 1177 | void acpi_os_wait_events_complete(void) |
19cd847a | 1178 | { |
90253a79 LZ |
1179 | /* |
1180 | * Make sure the GPE handler or the fixed event handler is not used | |
1181 | * on another CPU after removal. | |
1182 | */ | |
1183 | if (acpi_irq_handler) | |
1184 | synchronize_hardirq(acpi_gbl_FADT.sci_interrupt); | |
7b98118a RW |
1185 | flush_workqueue(kacpid_wq); |
1186 | flush_workqueue(kacpi_notify_wq); | |
19cd847a | 1187 | } |
1da177e4 | 1188 | |
7b98118a RW |
1189 | struct acpi_hp_work { |
1190 | struct work_struct work; | |
1e3bcb59 | 1191 | struct acpi_device *adev; |
7b98118a RW |
1192 | u32 src; |
1193 | }; | |
1194 | ||
1195 | static void acpi_hotplug_work_fn(struct work_struct *work) | |
19cd847a | 1196 | { |
7b98118a RW |
1197 | struct acpi_hp_work *hpw = container_of(work, struct acpi_hp_work, work); |
1198 | ||
1199 | acpi_os_wait_events_complete(); | |
1e3bcb59 | 1200 | acpi_device_hotplug(hpw->adev, hpw->src); |
7b98118a | 1201 | kfree(hpw); |
19cd847a ZR |
1202 | } |
1203 | ||
1e3bcb59 | 1204 | acpi_status acpi_hotplug_schedule(struct acpi_device *adev, u32 src) |
1da177e4 | 1205 | { |
7b98118a RW |
1206 | struct acpi_hp_work *hpw; |
1207 | ||
1208 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, | |
1e3bcb59 RW |
1209 | "Scheduling hotplug event (%p, %u) for deferred execution.\n", |
1210 | adev, src)); | |
7b98118a RW |
1211 | |
1212 | hpw = kmalloc(sizeof(*hpw), GFP_KERNEL); | |
1213 | if (!hpw) | |
1214 | return AE_NO_MEMORY; | |
1215 | ||
1216 | INIT_WORK(&hpw->work, acpi_hotplug_work_fn); | |
1e3bcb59 | 1217 | hpw->adev = adev; |
7b98118a RW |
1218 | hpw->src = src; |
1219 | /* | |
1220 | * We can't run hotplug code in kacpid_wq/kacpid_notify_wq etc., because | |
1221 | * the hotplug code may call driver .remove() functions, which may | |
1222 | * invoke flush_scheduled_work()/acpi_os_wait_events_complete() to flush | |
1223 | * these workqueues. | |
1224 | */ | |
1225 | if (!queue_work(kacpi_hotplug_wq, &hpw->work)) { | |
1226 | kfree(hpw); | |
1227 | return AE_ERROR; | |
1228 | } | |
1229 | return AE_OK; | |
1da177e4 | 1230 | } |
4be44fcd | 1231 | |
d783156e RW |
1232 | bool acpi_queue_hotplug_work(struct work_struct *work) |
1233 | { | |
1234 | return queue_work(kacpi_hotplug_wq, work); | |
1235 | } | |
1da177e4 | 1236 | |
1da177e4 | 1237 | acpi_status |
4be44fcd | 1238 | acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle) |
1da177e4 | 1239 | { |
4be44fcd | 1240 | struct semaphore *sem = NULL; |
1da177e4 | 1241 | |
2d0acb4a | 1242 | sem = acpi_os_allocate_zeroed(sizeof(struct semaphore)); |
1da177e4 | 1243 | if (!sem) |
d550d98d | 1244 | return AE_NO_MEMORY; |
1da177e4 LT |
1245 | |
1246 | sema_init(sem, initial_units); | |
1247 | ||
4be44fcd | 1248 | *handle = (acpi_handle *) sem; |
1da177e4 | 1249 | |
4be44fcd LB |
1250 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n", |
1251 | *handle, initial_units)); | |
1da177e4 | 1252 | |
d550d98d | 1253 | return AE_OK; |
1da177e4 | 1254 | } |
1da177e4 | 1255 | |
1da177e4 LT |
1256 | /* |
1257 | * TODO: A better way to delete semaphores? Linux doesn't have a | |
1258 | * 'delete_semaphore()' function -- may result in an invalid | |
1259 | * pointer dereference for non-synchronized consumers. Should | |
1260 | * we at least check for blocked threads and signal/cancel them? | |
1261 | */ | |
1262 | ||
4be44fcd | 1263 | acpi_status acpi_os_delete_semaphore(acpi_handle handle) |
1da177e4 | 1264 | { |
4be44fcd | 1265 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 1266 | |
1da177e4 | 1267 | if (!sem) |
d550d98d | 1268 | return AE_BAD_PARAMETER; |
1da177e4 | 1269 | |
4be44fcd | 1270 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle)); |
1da177e4 | 1271 | |
f1241c87 | 1272 | BUG_ON(!list_empty(&sem->wait_list)); |
02438d87 | 1273 | kfree(sem); |
4be44fcd | 1274 | sem = NULL; |
1da177e4 | 1275 | |
d550d98d | 1276 | return AE_OK; |
1da177e4 | 1277 | } |
1da177e4 | 1278 | |
1da177e4 | 1279 | /* |
1da177e4 LT |
1280 | * TODO: Support for units > 1? |
1281 | */ | |
4be44fcd | 1282 | acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout) |
1da177e4 | 1283 | { |
4be44fcd LB |
1284 | acpi_status status = AE_OK; |
1285 | struct semaphore *sem = (struct semaphore *)handle; | |
f1241c87 | 1286 | long jiffies; |
4be44fcd | 1287 | int ret = 0; |
1da177e4 | 1288 | |
7901a052 LZ |
1289 | if (!acpi_os_initialized) |
1290 | return AE_OK; | |
1291 | ||
1da177e4 | 1292 | if (!sem || (units < 1)) |
d550d98d | 1293 | return AE_BAD_PARAMETER; |
1da177e4 LT |
1294 | |
1295 | if (units > 1) | |
d550d98d | 1296 | return AE_SUPPORT; |
1da177e4 | 1297 | |
4be44fcd LB |
1298 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n", |
1299 | handle, units, timeout)); | |
1da177e4 | 1300 | |
f1241c87 MW |
1301 | if (timeout == ACPI_WAIT_FOREVER) |
1302 | jiffies = MAX_SCHEDULE_TIMEOUT; | |
1303 | else | |
1304 | jiffies = msecs_to_jiffies(timeout); | |
cad1525a | 1305 | |
f1241c87 MW |
1306 | ret = down_timeout(sem, jiffies); |
1307 | if (ret) | |
1308 | status = AE_TIME; | |
1da177e4 LT |
1309 | |
1310 | if (ACPI_FAILURE(status)) { | |
9e7e2c04 | 1311 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, |
a6fc6720 | 1312 | "Failed to acquire semaphore[%p|%d|%d], %s", |
4be44fcd LB |
1313 | handle, units, timeout, |
1314 | acpi_format_exception(status))); | |
1315 | } else { | |
1316 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, | |
a6fc6720 | 1317 | "Acquired semaphore[%p|%d|%d]", handle, |
4be44fcd | 1318 | units, timeout)); |
1da177e4 LT |
1319 | } |
1320 | ||
d550d98d | 1321 | return status; |
1da177e4 | 1322 | } |
1da177e4 | 1323 | |
1da177e4 LT |
1324 | /* |
1325 | * TODO: Support for units > 1? | |
1326 | */ | |
4be44fcd | 1327 | acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units) |
1da177e4 | 1328 | { |
4be44fcd | 1329 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 1330 | |
7901a052 LZ |
1331 | if (!acpi_os_initialized) |
1332 | return AE_OK; | |
1333 | ||
1da177e4 | 1334 | if (!sem || (units < 1)) |
d550d98d | 1335 | return AE_BAD_PARAMETER; |
1da177e4 LT |
1336 | |
1337 | if (units > 1) | |
d550d98d | 1338 | return AE_SUPPORT; |
1da177e4 | 1339 | |
4be44fcd LB |
1340 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle, |
1341 | units)); | |
1da177e4 LT |
1342 | |
1343 | up(sem); | |
1344 | ||
d550d98d | 1345 | return AE_OK; |
1da177e4 | 1346 | } |
4be44fcd | 1347 | |
1da177e4 | 1348 | #ifdef ACPI_FUTURE_USAGE |
4be44fcd | 1349 | u32 acpi_os_get_line(char *buffer) |
1da177e4 LT |
1350 | { |
1351 | ||
1352 | #ifdef ENABLE_DEBUGGER | |
1353 | if (acpi_in_debugger) { | |
1354 | u32 chars; | |
1355 | ||
1356 | kdb_read(buffer, sizeof(line_buf)); | |
1357 | ||
1358 | /* remove the CR kdb includes */ | |
1359 | chars = strlen(buffer) - 1; | |
1360 | buffer[chars] = '\0'; | |
1361 | } | |
1362 | #endif | |
1363 | ||
1364 | return 0; | |
1365 | } | |
4be44fcd | 1366 | #endif /* ACPI_FUTURE_USAGE */ |
1da177e4 | 1367 | |
4be44fcd | 1368 | acpi_status acpi_os_signal(u32 function, void *info) |
1da177e4 | 1369 | { |
4be44fcd | 1370 | switch (function) { |
1da177e4 LT |
1371 | case ACPI_SIGNAL_FATAL: |
1372 | printk(KERN_ERR PREFIX "Fatal opcode executed\n"); | |
1373 | break; | |
1374 | case ACPI_SIGNAL_BREAKPOINT: | |
1375 | /* | |
1376 | * AML Breakpoint | |
1377 | * ACPI spec. says to treat it as a NOP unless | |
1378 | * you are debugging. So if/when we integrate | |
1379 | * AML debugger into the kernel debugger its | |
1380 | * hook will go here. But until then it is | |
1381 | * not useful to print anything on breakpoints. | |
1382 | */ | |
1383 | break; | |
1384 | default: | |
1385 | break; | |
1386 | } | |
1387 | ||
1388 | return AE_OK; | |
1389 | } | |
4be44fcd | 1390 | |
4be44fcd | 1391 | static int __init acpi_os_name_setup(char *str) |
1da177e4 LT |
1392 | { |
1393 | char *p = acpi_os_name; | |
4be44fcd | 1394 | int count = ACPI_MAX_OVERRIDE_LEN - 1; |
1da177e4 LT |
1395 | |
1396 | if (!str || !*str) | |
1397 | return 0; | |
1398 | ||
5e2be4e0 | 1399 | for (; count-- && *str; str++) { |
1da177e4 LT |
1400 | if (isalnum(*str) || *str == ' ' || *str == ':') |
1401 | *p++ = *str; | |
1402 | else if (*str == '\'' || *str == '"') | |
1403 | continue; | |
1404 | else | |
1405 | break; | |
1406 | } | |
1407 | *p = 0; | |
1408 | ||
1409 | return 1; | |
4be44fcd | 1410 | |
1da177e4 LT |
1411 | } |
1412 | ||
1413 | __setup("acpi_os_name=", acpi_os_name_setup); | |
1414 | ||
12d32064 LM |
1415 | #define OSI_STRING_LENGTH_MAX 64 /* arbitrary */ |
1416 | #define OSI_STRING_ENTRIES_MAX 16 /* arbitrary */ | |
1417 | ||
1418 | struct osi_setup_entry { | |
1419 | char string[OSI_STRING_LENGTH_MAX]; | |
1420 | bool enable; | |
1421 | }; | |
1422 | ||
e73d3136 HG |
1423 | static struct osi_setup_entry |
1424 | osi_setup_entries[OSI_STRING_ENTRIES_MAX] __initdata = { | |
aa165971 SL |
1425 | {"Module Device", true}, |
1426 | {"Processor Device", true}, | |
1427 | {"3.0 _SCP Extensions", true}, | |
1428 | {"Processor Aggregator Device", true}, | |
1429 | }; | |
12d32064 | 1430 | |
d90aa92c LM |
1431 | void __init acpi_osi_setup(char *str) |
1432 | { | |
12d32064 LM |
1433 | struct osi_setup_entry *osi; |
1434 | bool enable = true; | |
1435 | int i; | |
1436 | ||
d90aa92c LM |
1437 | if (!acpi_gbl_create_osi_method) |
1438 | return; | |
1439 | ||
1440 | if (str == NULL || *str == '\0') { | |
1441 | printk(KERN_INFO PREFIX "_OSI method disabled\n"); | |
1442 | acpi_gbl_create_osi_method = FALSE; | |
12d32064 LM |
1443 | return; |
1444 | } | |
1445 | ||
1446 | if (*str == '!') { | |
1447 | str++; | |
5dc17986 LZ |
1448 | if (*str == '\0') { |
1449 | osi_linux.default_disabling = 1; | |
1450 | return; | |
741d8128 LZ |
1451 | } else if (*str == '*') { |
1452 | acpi_update_interfaces(ACPI_DISABLE_ALL_STRINGS); | |
1453 | for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { | |
1454 | osi = &osi_setup_entries[i]; | |
1455 | osi->enable = false; | |
1456 | } | |
1457 | return; | |
5dc17986 | 1458 | } |
12d32064 LM |
1459 | enable = false; |
1460 | } | |
1461 | ||
1462 | for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { | |
1463 | osi = &osi_setup_entries[i]; | |
1464 | if (!strcmp(osi->string, str)) { | |
1465 | osi->enable = enable; | |
1466 | break; | |
1467 | } else if (osi->string[0] == '\0') { | |
1468 | osi->enable = enable; | |
1469 | strncpy(osi->string, str, OSI_STRING_LENGTH_MAX); | |
1470 | break; | |
1471 | } | |
1472 | } | |
d90aa92c LM |
1473 | } |
1474 | ||
d4b7dc49 LB |
1475 | static void __init set_osi_linux(unsigned int enable) |
1476 | { | |
d90aa92c | 1477 | if (osi_linux.enable != enable) |
d4b7dc49 | 1478 | osi_linux.enable = enable; |
b0ed7a91 LM |
1479 | |
1480 | if (osi_linux.enable) | |
1481 | acpi_osi_setup("Linux"); | |
1482 | else | |
1483 | acpi_osi_setup("!Linux"); | |
1484 | ||
d4b7dc49 LB |
1485 | return; |
1486 | } | |
1487 | ||
1488 | static void __init acpi_cmdline_osi_linux(unsigned int enable) | |
1489 | { | |
d90aa92c LM |
1490 | osi_linux.cmdline = 1; /* cmdline set the default and override DMI */ |
1491 | osi_linux.dmi = 0; | |
d4b7dc49 LB |
1492 | set_osi_linux(enable); |
1493 | ||
1494 | return; | |
1495 | } | |
1496 | ||
1497 | void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d) | |
1498 | { | |
d4b7dc49 LB |
1499 | printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident); |
1500 | ||
1501 | if (enable == -1) | |
1502 | return; | |
1503 | ||
d90aa92c | 1504 | osi_linux.dmi = 1; /* DMI knows that this box asks OSI(Linux) */ |
d4b7dc49 | 1505 | set_osi_linux(enable); |
f507654d | 1506 | |
f507654d LB |
1507 | return; |
1508 | } | |
1509 | ||
1da177e4 | 1510 | /* |
ae00d812 LB |
1511 | * Modify the list of "OS Interfaces" reported to BIOS via _OSI |
1512 | * | |
1da177e4 | 1513 | * empty string disables _OSI |
ae00d812 LB |
1514 | * string starting with '!' disables that string |
1515 | * otherwise string is added to list, augmenting built-in strings | |
1da177e4 | 1516 | */ |
b0ed7a91 | 1517 | static void __init acpi_osi_setup_late(void) |
1da177e4 | 1518 | { |
12d32064 LM |
1519 | struct osi_setup_entry *osi; |
1520 | char *str; | |
1521 | int i; | |
d90aa92c | 1522 | acpi_status status; |
b0ed7a91 | 1523 | |
5dc17986 LZ |
1524 | if (osi_linux.default_disabling) { |
1525 | status = acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS); | |
1526 | ||
1527 | if (ACPI_SUCCESS(status)) | |
1528 | printk(KERN_INFO PREFIX "Disabled all _OSI OS vendors\n"); | |
1529 | } | |
1530 | ||
12d32064 LM |
1531 | for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { |
1532 | osi = &osi_setup_entries[i]; | |
1533 | str = osi->string; | |
b0ed7a91 | 1534 | |
12d32064 LM |
1535 | if (*str == '\0') |
1536 | break; | |
1537 | if (osi->enable) { | |
1538 | status = acpi_install_interface(str); | |
d90aa92c | 1539 | |
12d32064 LM |
1540 | if (ACPI_SUCCESS(status)) |
1541 | printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str); | |
1542 | } else { | |
1543 | status = acpi_remove_interface(str); | |
d90aa92c | 1544 | |
12d32064 LM |
1545 | if (ACPI_SUCCESS(status)) |
1546 | printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str); | |
1547 | } | |
b0ed7a91 LM |
1548 | } |
1549 | } | |
1550 | ||
d90aa92c | 1551 | static int __init osi_setup(char *str) |
b0ed7a91 | 1552 | { |
d90aa92c LM |
1553 | if (str && !strcmp("Linux", str)) |
1554 | acpi_cmdline_osi_linux(1); | |
1555 | else if (str && !strcmp("!Linux", str)) | |
1556 | acpi_cmdline_osi_linux(0); | |
1557 | else | |
1558 | acpi_osi_setup(str); | |
1da177e4 LT |
1559 | |
1560 | return 1; | |
1561 | } | |
1562 | ||
d90aa92c | 1563 | __setup("acpi_osi=", osi_setup); |
1da177e4 | 1564 | |
22b5afce | 1565 | /* |
08e1d7c0 | 1566 | * Disable the auto-serialization of named objects creation methods. |
22b5afce | 1567 | * |
08e1d7c0 | 1568 | * This feature is enabled by default. It marks the AML control methods |
22b5afce BM |
1569 | * that contain the opcodes to create named objects as "Serialized". |
1570 | */ | |
08e1d7c0 | 1571 | static int __init acpi_no_auto_serialize_setup(char *str) |
1da177e4 | 1572 | { |
08e1d7c0 LZ |
1573 | acpi_gbl_auto_serialize_methods = FALSE; |
1574 | pr_info("ACPI: auto-serialization disabled\n"); | |
1da177e4 LT |
1575 | |
1576 | return 1; | |
1577 | } | |
1578 | ||
08e1d7c0 | 1579 | __setup("acpi_no_auto_serialize", acpi_no_auto_serialize_setup); |
1da177e4 | 1580 | |
df92e695 TR |
1581 | /* Check of resource interference between native drivers and ACPI |
1582 | * OperationRegions (SystemIO and System Memory only). | |
1583 | * IO ports and memory declared in ACPI might be used by the ACPI subsystem | |
1584 | * in arbitrary AML code and can interfere with legacy drivers. | |
1585 | * acpi_enforce_resources= can be set to: | |
1586 | * | |
7e90560c | 1587 | * - strict (default) (2) |
df92e695 | 1588 | * -> further driver trying to access the resources will not load |
7e90560c | 1589 | * - lax (1) |
df92e695 TR |
1590 | * -> further driver trying to access the resources will load, but you |
1591 | * get a system message that something might go wrong... | |
1592 | * | |
1593 | * - no (0) | |
1594 | * -> ACPI Operation Region resources will not be registered | |
1595 | * | |
1596 | */ | |
1597 | #define ENFORCE_RESOURCES_STRICT 2 | |
1598 | #define ENFORCE_RESOURCES_LAX 1 | |
1599 | #define ENFORCE_RESOURCES_NO 0 | |
1600 | ||
7e90560c | 1601 | static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; |
df92e695 TR |
1602 | |
1603 | static int __init acpi_enforce_resources_setup(char *str) | |
1604 | { | |
1605 | if (str == NULL || *str == '\0') | |
1606 | return 0; | |
1607 | ||
1608 | if (!strcmp("strict", str)) | |
1609 | acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; | |
1610 | else if (!strcmp("lax", str)) | |
1611 | acpi_enforce_resources = ENFORCE_RESOURCES_LAX; | |
1612 | else if (!strcmp("no", str)) | |
1613 | acpi_enforce_resources = ENFORCE_RESOURCES_NO; | |
1614 | ||
1615 | return 1; | |
1616 | } | |
1617 | ||
1618 | __setup("acpi_enforce_resources=", acpi_enforce_resources_setup); | |
1619 | ||
1620 | /* Check for resource conflicts between ACPI OperationRegions and native | |
1621 | * drivers */ | |
876fba43 | 1622 | int acpi_check_resource_conflict(const struct resource *res) |
df92e695 | 1623 | { |
f654c0fe LM |
1624 | acpi_adr_space_type space_id; |
1625 | acpi_size length; | |
1626 | u8 warn = 0; | |
1627 | int clash = 0; | |
df92e695 TR |
1628 | |
1629 | if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) | |
1630 | return 0; | |
1631 | if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM)) | |
1632 | return 0; | |
1633 | ||
f654c0fe LM |
1634 | if (res->flags & IORESOURCE_IO) |
1635 | space_id = ACPI_ADR_SPACE_SYSTEM_IO; | |
1636 | else | |
1637 | space_id = ACPI_ADR_SPACE_SYSTEM_MEMORY; | |
df92e695 | 1638 | |
e4f52244 | 1639 | length = resource_size(res); |
f654c0fe LM |
1640 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) |
1641 | warn = 1; | |
1642 | clash = acpi_check_address_range(space_id, res->start, length, warn); | |
df92e695 TR |
1643 | |
1644 | if (clash) { | |
1645 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) { | |
14f03343 JD |
1646 | if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX) |
1647 | printk(KERN_NOTICE "ACPI: This conflict may" | |
1648 | " cause random problems and system" | |
1649 | " instability\n"); | |
1650 | printk(KERN_INFO "ACPI: If an ACPI driver is available" | |
1651 | " for this device, you should use it instead of" | |
1652 | " the native driver\n"); | |
df92e695 TR |
1653 | } |
1654 | if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT) | |
1655 | return -EBUSY; | |
1656 | } | |
1657 | return 0; | |
1658 | } | |
443dea72 | 1659 | EXPORT_SYMBOL(acpi_check_resource_conflict); |
df92e695 TR |
1660 | |
1661 | int acpi_check_region(resource_size_t start, resource_size_t n, | |
1662 | const char *name) | |
1663 | { | |
1664 | struct resource res = { | |
1665 | .start = start, | |
1666 | .end = start + n - 1, | |
1667 | .name = name, | |
1668 | .flags = IORESOURCE_IO, | |
1669 | }; | |
1670 | ||
1671 | return acpi_check_resource_conflict(&res); | |
1672 | } | |
1673 | EXPORT_SYMBOL(acpi_check_region); | |
1674 | ||
70dd6bea JD |
1675 | /* |
1676 | * Let drivers know whether the resource checks are effective | |
1677 | */ | |
1678 | int acpi_resources_are_enforced(void) | |
1679 | { | |
1680 | return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT; | |
1681 | } | |
1682 | EXPORT_SYMBOL(acpi_resources_are_enforced); | |
1683 | ||
a87878ba HG |
1684 | bool acpi_osi_is_win8(void) |
1685 | { | |
1686 | return acpi_gbl_osi_data >= ACPI_OSI_WIN_8; | |
1687 | } | |
1688 | EXPORT_SYMBOL(acpi_osi_is_win8); | |
1689 | ||
9f63b88b LM |
1690 | /* |
1691 | * Deallocate the memory for a spinlock. | |
1692 | */ | |
1693 | void acpi_os_delete_lock(acpi_spinlock handle) | |
1694 | { | |
1695 | ACPI_FREE(handle); | |
1696 | } | |
1697 | ||
73459f73 RM |
1698 | /* |
1699 | * Acquire a spinlock. | |
1700 | * | |
1701 | * handle is a pointer to the spinlock_t. | |
73459f73 RM |
1702 | */ |
1703 | ||
967440e3 | 1704 | acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp) |
73459f73 | 1705 | { |
b8e4d893 | 1706 | acpi_cpu_flags flags; |
967440e3 | 1707 | spin_lock_irqsave(lockp, flags); |
73459f73 RM |
1708 | return flags; |
1709 | } | |
1710 | ||
1711 | /* | |
1712 | * Release a spinlock. See above. | |
1713 | */ | |
1714 | ||
967440e3 | 1715 | void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags) |
73459f73 | 1716 | { |
967440e3 | 1717 | spin_unlock_irqrestore(lockp, flags); |
73459f73 RM |
1718 | } |
1719 | ||
73459f73 RM |
1720 | #ifndef ACPI_USE_LOCAL_CACHE |
1721 | ||
1722 | /******************************************************************************* | |
1723 | * | |
1724 | * FUNCTION: acpi_os_create_cache | |
1725 | * | |
b229cf92 BM |
1726 | * PARAMETERS: name - Ascii name for the cache |
1727 | * size - Size of each cached object | |
1728 | * depth - Maximum depth of the cache (in objects) <ignored> | |
1729 | * cache - Where the new cache object is returned | |
73459f73 | 1730 | * |
b229cf92 | 1731 | * RETURN: status |
73459f73 RM |
1732 | * |
1733 | * DESCRIPTION: Create a cache object | |
1734 | * | |
1735 | ******************************************************************************/ | |
1736 | ||
1737 | acpi_status | |
4be44fcd | 1738 | acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache) |
73459f73 | 1739 | { |
20c2df83 | 1740 | *cache = kmem_cache_create(name, size, 0, 0, NULL); |
a6fdbf90 | 1741 | if (*cache == NULL) |
b229cf92 BM |
1742 | return AE_ERROR; |
1743 | else | |
1744 | return AE_OK; | |
73459f73 RM |
1745 | } |
1746 | ||
1747 | /******************************************************************************* | |
1748 | * | |
1749 | * FUNCTION: acpi_os_purge_cache | |
1750 | * | |
1751 | * PARAMETERS: Cache - Handle to cache object | |
1752 | * | |
1753 | * RETURN: Status | |
1754 | * | |
1755 | * DESCRIPTION: Free all objects within the requested cache. | |
1756 | * | |
1757 | ******************************************************************************/ | |
1758 | ||
4be44fcd | 1759 | acpi_status acpi_os_purge_cache(acpi_cache_t * cache) |
73459f73 | 1760 | { |
50dd0969 | 1761 | kmem_cache_shrink(cache); |
4be44fcd | 1762 | return (AE_OK); |
73459f73 RM |
1763 | } |
1764 | ||
1765 | /******************************************************************************* | |
1766 | * | |
1767 | * FUNCTION: acpi_os_delete_cache | |
1768 | * | |
1769 | * PARAMETERS: Cache - Handle to cache object | |
1770 | * | |
1771 | * RETURN: Status | |
1772 | * | |
1773 | * DESCRIPTION: Free all objects within the requested cache and delete the | |
1774 | * cache object. | |
1775 | * | |
1776 | ******************************************************************************/ | |
1777 | ||
4be44fcd | 1778 | acpi_status acpi_os_delete_cache(acpi_cache_t * cache) |
73459f73 | 1779 | { |
1a1d92c1 | 1780 | kmem_cache_destroy(cache); |
4be44fcd | 1781 | return (AE_OK); |
73459f73 RM |
1782 | } |
1783 | ||
1784 | /******************************************************************************* | |
1785 | * | |
1786 | * FUNCTION: acpi_os_release_object | |
1787 | * | |
1788 | * PARAMETERS: Cache - Handle to cache object | |
1789 | * Object - The object to be released | |
1790 | * | |
1791 | * RETURN: None | |
1792 | * | |
1793 | * DESCRIPTION: Release an object to the specified cache. If cache is full, | |
1794 | * the object is deleted. | |
1795 | * | |
1796 | ******************************************************************************/ | |
1797 | ||
4be44fcd | 1798 | acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object) |
73459f73 | 1799 | { |
4be44fcd LB |
1800 | kmem_cache_free(cache, object); |
1801 | return (AE_OK); | |
73459f73 | 1802 | } |
73459f73 | 1803 | #endif |
d362edaf | 1804 | |
a94e88cd | 1805 | static int __init acpi_no_static_ssdt_setup(char *s) |
b75dd297 | 1806 | { |
a94e88cd LZ |
1807 | acpi_gbl_disable_ssdt_table_install = TRUE; |
1808 | pr_info("ACPI: static SSDT installation disabled\n"); | |
b75dd297 | 1809 | |
a94e88cd | 1810 | return 0; |
b75dd297 LZ |
1811 | } |
1812 | ||
a94e88cd | 1813 | early_param("acpi_no_static_ssdt", acpi_no_static_ssdt_setup); |
b75dd297 | 1814 | |
4dde507f LZ |
1815 | static int __init acpi_disable_return_repair(char *s) |
1816 | { | |
1817 | printk(KERN_NOTICE PREFIX | |
1818 | "ACPI: Predefined validation mechanism disabled\n"); | |
1819 | acpi_gbl_disable_auto_repair = TRUE; | |
1820 | ||
1821 | return 1; | |
1822 | } | |
1823 | ||
1824 | __setup("acpica_no_return_repair", acpi_disable_return_repair); | |
1825 | ||
d362edaf MS |
1826 | acpi_status __init acpi_os_initialize(void) |
1827 | { | |
1828 | acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block); | |
1829 | acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block); | |
1830 | acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block); | |
1831 | acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block); | |
a4714a89 RW |
1832 | if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) { |
1833 | /* | |
1834 | * Use acpi_os_map_generic_address to pre-map the reset | |
1835 | * register if it's in system memory. | |
1836 | */ | |
1837 | int rv; | |
1838 | ||
1839 | rv = acpi_os_map_generic_address(&acpi_gbl_FADT.reset_register); | |
1840 | pr_debug(PREFIX "%s: map reset_reg status %d\n", __func__, rv); | |
1841 | } | |
7901a052 | 1842 | acpi_os_initialized = true; |
d362edaf MS |
1843 | |
1844 | return AE_OK; | |
1845 | } | |
1846 | ||
32d47eef | 1847 | acpi_status __init acpi_os_initialize1(void) |
d362edaf | 1848 | { |
44d2588e TH |
1849 | kacpid_wq = alloc_workqueue("kacpid", 0, 1); |
1850 | kacpi_notify_wq = alloc_workqueue("kacpi_notify", 0, 1); | |
d783156e | 1851 | kacpi_hotplug_wq = alloc_ordered_workqueue("kacpi_hotplug", 0); |
d362edaf MS |
1852 | BUG_ON(!kacpid_wq); |
1853 | BUG_ON(!kacpi_notify_wq); | |
1854 | BUG_ON(!kacpi_hotplug_wq); | |
1bd64d42 LB |
1855 | acpi_install_interface_handler(acpi_osi_handler); |
1856 | acpi_osi_setup_late(); | |
d362edaf MS |
1857 | return AE_OK; |
1858 | } | |
1859 | ||
1860 | acpi_status acpi_os_terminate(void) | |
1861 | { | |
1862 | if (acpi_irq_handler) { | |
23fe3630 | 1863 | acpi_os_remove_interrupt_handler(acpi_gbl_FADT.sci_interrupt, |
d362edaf MS |
1864 | acpi_irq_handler); |
1865 | } | |
1866 | ||
1867 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe1_block); | |
1868 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block); | |
1869 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block); | |
1870 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block); | |
a4714a89 RW |
1871 | if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) |
1872 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.reset_register); | |
d362edaf MS |
1873 | |
1874 | destroy_workqueue(kacpid_wq); | |
1875 | destroy_workqueue(kacpi_notify_wq); | |
1876 | destroy_workqueue(kacpi_hotplug_wq); | |
1877 | ||
1878 | return AE_OK; | |
1879 | } | |
09f98a82 TL |
1880 | |
1881 | acpi_status acpi_os_prepare_sleep(u8 sleep_state, u32 pm1a_control, | |
1882 | u32 pm1b_control) | |
1883 | { | |
1884 | int rc = 0; | |
1885 | if (__acpi_os_prepare_sleep) | |
1886 | rc = __acpi_os_prepare_sleep(sleep_state, | |
1887 | pm1a_control, pm1b_control); | |
1888 | if (rc < 0) | |
1889 | return AE_ERROR; | |
1890 | else if (rc > 0) | |
1891 | return AE_CTRL_SKIP; | |
1892 | ||
1893 | return AE_OK; | |
1894 | } | |
1895 | ||
1896 | void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state, | |
1897 | u32 pm1a_ctrl, u32 pm1b_ctrl)) | |
1898 | { | |
1899 | __acpi_os_prepare_sleep = func; | |
1900 | } | |
92d8aff3 | 1901 | |
d6b47b12 BG |
1902 | acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state, u32 val_a, |
1903 | u32 val_b) | |
1904 | { | |
1905 | int rc = 0; | |
1906 | if (__acpi_os_prepare_extended_sleep) | |
1907 | rc = __acpi_os_prepare_extended_sleep(sleep_state, | |
1908 | val_a, val_b); | |
1909 | if (rc < 0) | |
1910 | return AE_ERROR; | |
1911 | else if (rc > 0) | |
1912 | return AE_CTRL_SKIP; | |
1913 | ||
1914 | return AE_OK; | |
1915 | } | |
1916 | ||
1917 | void acpi_os_set_prepare_extended_sleep(int (*func)(u8 sleep_state, | |
1918 | u32 val_a, u32 val_b)) | |
1919 | { | |
1920 | __acpi_os_prepare_extended_sleep = func; | |
1921 | } |