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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 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; if not, write to the Free Software | |
24 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
25 | * | |
26 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
27 | * | |
28 | */ | |
29 | ||
1da177e4 LT |
30 | #include <linux/module.h> |
31 | #include <linux/kernel.h> | |
32 | #include <linux/slab.h> | |
33 | #include <linux/mm.h> | |
ba242d5b | 34 | #include <linux/highmem.h> |
1da177e4 | 35 | #include <linux/pci.h> |
1da177e4 LT |
36 | #include <linux/interrupt.h> |
37 | #include <linux/kmod.h> | |
38 | #include <linux/delay.h> | |
39 | #include <linux/workqueue.h> | |
40 | #include <linux/nmi.h> | |
ad71860a | 41 | #include <linux/acpi.h> |
1da177e4 | 42 | #include <linux/efi.h> |
df92e695 TR |
43 | #include <linux/ioport.h> |
44 | #include <linux/list.h> | |
f1241c87 MW |
45 | #include <linux/jiffies.h> |
46 | #include <linux/semaphore.h> | |
47 | ||
48 | #include <asm/io.h> | |
49 | #include <asm/uaccess.h> | |
50 | ||
1129c92f | 51 | #include "internal.h" |
1da177e4 | 52 | |
1da177e4 | 53 | #define _COMPONENT ACPI_OS_SERVICES |
f52fd66d | 54 | ACPI_MODULE_NAME("osl"); |
07070e12 | 55 | |
4be44fcd LB |
56 | struct acpi_os_dpc { |
57 | acpi_osd_exec_callback function; | |
58 | void *context; | |
65f27f38 | 59 | struct work_struct work; |
1da177e4 LT |
60 | }; |
61 | ||
62 | #ifdef CONFIG_ACPI_CUSTOM_DSDT | |
63 | #include CONFIG_ACPI_CUSTOM_DSDT_FILE | |
64 | #endif | |
65 | ||
66 | #ifdef ENABLE_DEBUGGER | |
67 | #include <linux/kdb.h> | |
68 | ||
69 | /* stuff for debugger support */ | |
70 | int acpi_in_debugger; | |
71 | EXPORT_SYMBOL(acpi_in_debugger); | |
72 | ||
73 | extern char line_buf[80]; | |
4be44fcd | 74 | #endif /*ENABLE_DEBUGGER */ |
1da177e4 | 75 | |
09f98a82 TL |
76 | static int (*__acpi_os_prepare_sleep)(u8 sleep_state, u32 pm1a_ctrl, |
77 | u32 pm1b_ctrl); | |
d6b47b12 BG |
78 | static int (*__acpi_os_prepare_extended_sleep)(u8 sleep_state, u32 val_a, |
79 | u32 val_b); | |
09f98a82 | 80 | |
1da177e4 LT |
81 | static acpi_osd_handler acpi_irq_handler; |
82 | static void *acpi_irq_context; | |
83 | static struct workqueue_struct *kacpid_wq; | |
88db5e14 | 84 | static struct workqueue_struct *kacpi_notify_wq; |
92d8aff3 | 85 | static struct workqueue_struct *kacpi_hotplug_wq; |
1da177e4 | 86 | |
620242ae MS |
87 | /* |
88 | * This list of permanent mappings is for memory that may be accessed from | |
89 | * interrupt context, where we can't do the ioremap(). | |
90 | */ | |
91 | struct acpi_ioremap { | |
92 | struct list_head list; | |
93 | void __iomem *virt; | |
94 | acpi_physical_address phys; | |
95 | acpi_size size; | |
b7c1fadd | 96 | unsigned long refcount; |
620242ae MS |
97 | }; |
98 | ||
99 | static LIST_HEAD(acpi_ioremaps); | |
7bbb8903 | 100 | static DEFINE_MUTEX(acpi_ioremap_lock); |
620242ae | 101 | |
b0ed7a91 | 102 | static void __init acpi_osi_setup_late(void); |
ae00d812 | 103 | |
d4b7dc49 | 104 | /* |
a6e0887f | 105 | * The story of _OSI(Linux) |
d4b7dc49 | 106 | * |
a6e0887f LB |
107 | * From pre-history through Linux-2.6.22, |
108 | * Linux responded TRUE upon a BIOS OSI(Linux) query. | |
d4b7dc49 | 109 | * |
a6e0887f LB |
110 | * Unfortunately, reference BIOS writers got wind of this |
111 | * and put OSI(Linux) in their example code, quickly exposing | |
112 | * this string as ill-conceived and opening the door to | |
113 | * an un-bounded number of BIOS incompatibilities. | |
d4b7dc49 | 114 | * |
a6e0887f LB |
115 | * For example, OSI(Linux) was used on resume to re-POST a |
116 | * video card on one system, because Linux at that time | |
117 | * could not do a speedy restore in its native driver. | |
118 | * But then upon gaining quick native restore capability, | |
119 | * Linux has no way to tell the BIOS to skip the time-consuming | |
120 | * POST -- putting Linux at a permanent performance disadvantage. | |
121 | * On another system, the BIOS writer used OSI(Linux) | |
122 | * to infer native OS support for IPMI! On other systems, | |
123 | * OSI(Linux) simply got in the way of Linux claiming to | |
124 | * be compatible with other operating systems, exposing | |
125 | * BIOS issues such as skipped device initialization. | |
d4b7dc49 | 126 | * |
a6e0887f LB |
127 | * So "Linux" turned out to be a really poor chose of |
128 | * OSI string, and from Linux-2.6.23 onward we respond FALSE. | |
d4b7dc49 LB |
129 | * |
130 | * BIOS writers should NOT query _OSI(Linux) on future systems. | |
a6e0887f LB |
131 | * Linux will complain on the console when it sees it, and return FALSE. |
132 | * To get Linux to return TRUE for your system will require | |
133 | * a kernel source update to add a DMI entry, | |
134 | * or boot with "acpi_osi=Linux" | |
d4b7dc49 | 135 | */ |
d4b7dc49 | 136 | |
1d15d84e | 137 | static struct osi_linux { |
d4b7dc49 LB |
138 | unsigned int enable:1; |
139 | unsigned int dmi:1; | |
140 | unsigned int cmdline:1; | |
5dc17986 LZ |
141 | unsigned int default_disabling:1; |
142 | } osi_linux = {0, 0, 0, 0}; | |
f507654d | 143 | |
b0ed7a91 LM |
144 | static u32 acpi_osi_handler(acpi_string interface, u32 supported) |
145 | { | |
146 | if (!strcmp("Linux", interface)) { | |
147 | ||
8997621b | 148 | printk_once(KERN_NOTICE FW_BUG PREFIX |
b0ed7a91 LM |
149 | "BIOS _OSI(Linux) query %s%s\n", |
150 | osi_linux.enable ? "honored" : "ignored", | |
151 | osi_linux.cmdline ? " via cmdline" : | |
152 | osi_linux.dmi ? " via DMI" : ""); | |
153 | } | |
154 | ||
7bc5a2ba MG |
155 | if (!strcmp("Darwin", interface)) { |
156 | /* | |
157 | * Apple firmware will behave poorly if it receives positive | |
158 | * answers to "Darwin" and any other OS. Respond positively | |
159 | * to Darwin and then disable all other vendor strings. | |
160 | */ | |
161 | acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS); | |
162 | supported = ACPI_UINT32_MAX; | |
163 | } | |
164 | ||
b0ed7a91 LM |
165 | return supported; |
166 | } | |
167 | ||
bc9ffce2 | 168 | static void __init acpi_request_region (struct acpi_generic_address *gas, |
9a47cdb1 BH |
169 | unsigned int length, char *desc) |
170 | { | |
bc9ffce2 MS |
171 | u64 addr; |
172 | ||
173 | /* Handle possible alignment issues */ | |
174 | memcpy(&addr, &gas->address, sizeof(addr)); | |
175 | if (!addr || !length) | |
9a47cdb1 BH |
176 | return; |
177 | ||
0294112e RW |
178 | /* Resources are never freed */ |
179 | if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_IO) | |
180 | request_region(addr, length, desc); | |
181 | else if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) | |
182 | request_mem_region(addr, length, desc); | |
9a47cdb1 BH |
183 | } |
184 | ||
0294112e | 185 | static int __init acpi_reserve_resources(void) |
9a47cdb1 | 186 | { |
eee3c859 | 187 | acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
188 | "ACPI PM1a_EVT_BLK"); |
189 | ||
eee3c859 | 190 | acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
191 | "ACPI PM1b_EVT_BLK"); |
192 | ||
eee3c859 | 193 | acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
194 | "ACPI PM1a_CNT_BLK"); |
195 | ||
eee3c859 | 196 | acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
197 | "ACPI PM1b_CNT_BLK"); |
198 | ||
eee3c859 LB |
199 | if (acpi_gbl_FADT.pm_timer_length == 4) |
200 | acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR"); | |
9a47cdb1 | 201 | |
eee3c859 | 202 | acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length, |
9a47cdb1 BH |
203 | "ACPI PM2_CNT_BLK"); |
204 | ||
205 | /* Length of GPE blocks must be a non-negative multiple of 2 */ | |
206 | ||
eee3c859 LB |
207 | if (!(acpi_gbl_FADT.gpe0_block_length & 0x1)) |
208 | acpi_request_region(&acpi_gbl_FADT.xgpe0_block, | |
209 | acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK"); | |
9a47cdb1 | 210 | |
eee3c859 LB |
211 | if (!(acpi_gbl_FADT.gpe1_block_length & 0x1)) |
212 | acpi_request_region(&acpi_gbl_FADT.xgpe1_block, | |
213 | acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK"); | |
0294112e RW |
214 | |
215 | return 0; | |
9a47cdb1 | 216 | } |
0294112e | 217 | fs_initcall_sync(acpi_reserve_resources); |
9a47cdb1 | 218 | |
4be44fcd | 219 | void acpi_os_printf(const char *fmt, ...) |
1da177e4 LT |
220 | { |
221 | va_list args; | |
222 | va_start(args, fmt); | |
223 | acpi_os_vprintf(fmt, args); | |
224 | va_end(args); | |
225 | } | |
4be44fcd | 226 | |
4be44fcd | 227 | void acpi_os_vprintf(const char *fmt, va_list args) |
1da177e4 LT |
228 | { |
229 | static char buffer[512]; | |
4be44fcd | 230 | |
1da177e4 LT |
231 | vsprintf(buffer, fmt, args); |
232 | ||
233 | #ifdef ENABLE_DEBUGGER | |
234 | if (acpi_in_debugger) { | |
235 | kdb_printf("%s", buffer); | |
236 | } else { | |
4d939155 | 237 | printk(KERN_CONT "%s", buffer); |
1da177e4 LT |
238 | } |
239 | #else | |
4d939155 | 240 | printk(KERN_CONT "%s", buffer); |
1da177e4 LT |
241 | #endif |
242 | } | |
243 | ||
4996c023 TI |
244 | #ifdef CONFIG_KEXEC |
245 | static unsigned long acpi_rsdp; | |
246 | static int __init setup_acpi_rsdp(char *arg) | |
247 | { | |
3d915894 CJ |
248 | if (kstrtoul(arg, 16, &acpi_rsdp)) |
249 | return -EINVAL; | |
4996c023 TI |
250 | return 0; |
251 | } | |
252 | early_param("acpi_rsdp", setup_acpi_rsdp); | |
253 | #endif | |
254 | ||
ad71860a | 255 | acpi_physical_address __init acpi_os_get_root_pointer(void) |
1da177e4 | 256 | { |
4996c023 TI |
257 | #ifdef CONFIG_KEXEC |
258 | if (acpi_rsdp) | |
259 | return acpi_rsdp; | |
260 | #endif | |
261 | ||
83e68189 | 262 | if (efi_enabled(EFI_CONFIG_TABLES)) { |
b2c99e3c | 263 | if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) |
ad71860a | 264 | return efi.acpi20; |
b2c99e3c | 265 | else if (efi.acpi != EFI_INVALID_TABLE_ADDR) |
ad71860a | 266 | return efi.acpi; |
1da177e4 | 267 | else { |
4be44fcd LB |
268 | printk(KERN_ERR PREFIX |
269 | "System description tables not found\n"); | |
ad71860a | 270 | return 0; |
1da177e4 | 271 | } |
8a1664be | 272 | } else if (IS_ENABLED(CONFIG_ACPI_LEGACY_TABLES_LOOKUP)) { |
239665a3 LB |
273 | acpi_physical_address pa = 0; |
274 | ||
275 | acpi_find_root_pointer(&pa); | |
276 | return pa; | |
277 | } | |
8a1664be GG |
278 | |
279 | return 0; | |
1da177e4 LT |
280 | } |
281 | ||
78cdb3ed | 282 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ |
4a3cba5e MS |
283 | static struct acpi_ioremap * |
284 | acpi_map_lookup(acpi_physical_address phys, acpi_size size) | |
620242ae MS |
285 | { |
286 | struct acpi_ioremap *map; | |
287 | ||
78cdb3ed | 288 | list_for_each_entry_rcu(map, &acpi_ioremaps, list) |
620242ae MS |
289 | if (map->phys <= phys && |
290 | phys + size <= map->phys + map->size) | |
4a3cba5e MS |
291 | return map; |
292 | ||
293 | return NULL; | |
294 | } | |
295 | ||
296 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ | |
297 | static void __iomem * | |
298 | acpi_map_vaddr_lookup(acpi_physical_address phys, unsigned int size) | |
299 | { | |
300 | struct acpi_ioremap *map; | |
301 | ||
302 | map = acpi_map_lookup(phys, size); | |
303 | if (map) | |
304 | return map->virt + (phys - map->phys); | |
620242ae MS |
305 | |
306 | return NULL; | |
307 | } | |
308 | ||
13606a2d RW |
309 | void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size) |
310 | { | |
311 | struct acpi_ioremap *map; | |
312 | void __iomem *virt = NULL; | |
313 | ||
314 | mutex_lock(&acpi_ioremap_lock); | |
315 | map = acpi_map_lookup(phys, size); | |
316 | if (map) { | |
317 | virt = map->virt + (phys - map->phys); | |
318 | map->refcount++; | |
319 | } | |
320 | mutex_unlock(&acpi_ioremap_lock); | |
321 | return virt; | |
322 | } | |
323 | EXPORT_SYMBOL_GPL(acpi_os_get_iomem); | |
324 | ||
78cdb3ed | 325 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ |
620242ae MS |
326 | static struct acpi_ioremap * |
327 | acpi_map_lookup_virt(void __iomem *virt, acpi_size size) | |
328 | { | |
329 | struct acpi_ioremap *map; | |
330 | ||
78cdb3ed | 331 | list_for_each_entry_rcu(map, &acpi_ioremaps, list) |
4a3cba5e MS |
332 | if (map->virt <= virt && |
333 | virt + size <= map->virt + map->size) | |
620242ae MS |
334 | return map; |
335 | ||
336 | return NULL; | |
337 | } | |
338 | ||
aafc65c7 | 339 | #if defined(CONFIG_IA64) || defined(CONFIG_ARM64) |
ba242d5b MS |
340 | /* ioremap will take care of cache attributes */ |
341 | #define should_use_kmap(pfn) 0 | |
aafc65c7 GG |
342 | #else |
343 | #define should_use_kmap(pfn) page_is_ram(pfn) | |
ba242d5b MS |
344 | #endif |
345 | ||
346 | static void __iomem *acpi_map(acpi_physical_address pg_off, unsigned long pg_sz) | |
347 | { | |
348 | unsigned long pfn; | |
349 | ||
350 | pfn = pg_off >> PAGE_SHIFT; | |
351 | if (should_use_kmap(pfn)) { | |
352 | if (pg_sz > PAGE_SIZE) | |
353 | return NULL; | |
354 | return (void __iomem __force *)kmap(pfn_to_page(pfn)); | |
355 | } else | |
356 | return acpi_os_ioremap(pg_off, pg_sz); | |
357 | } | |
358 | ||
359 | static void acpi_unmap(acpi_physical_address pg_off, void __iomem *vaddr) | |
360 | { | |
361 | unsigned long pfn; | |
362 | ||
363 | pfn = pg_off >> PAGE_SHIFT; | |
e252675f | 364 | if (should_use_kmap(pfn)) |
ba242d5b MS |
365 | kunmap(pfn_to_page(pfn)); |
366 | else | |
367 | iounmap(vaddr); | |
368 | } | |
369 | ||
2fdf0741 | 370 | void __iomem *__init_refok |
a238317c | 371 | acpi_os_map_iomem(acpi_physical_address phys, acpi_size size) |
1da177e4 | 372 | { |
7ffd0443 | 373 | struct acpi_ioremap *map; |
620242ae | 374 | void __iomem *virt; |
2d6d9fd3 RW |
375 | acpi_physical_address pg_off; |
376 | acpi_size pg_sz; | |
620242ae | 377 | |
9f4fd61f BH |
378 | if (phys > ULONG_MAX) { |
379 | printk(KERN_ERR PREFIX "Cannot map memory that high\n"); | |
70c0846e | 380 | return NULL; |
1da177e4 | 381 | } |
620242ae MS |
382 | |
383 | if (!acpi_gbl_permanent_mmap) | |
ad71860a | 384 | return __acpi_map_table((unsigned long)phys, size); |
620242ae | 385 | |
7ffd0443 RW |
386 | mutex_lock(&acpi_ioremap_lock); |
387 | /* Check if there's a suitable mapping already. */ | |
388 | map = acpi_map_lookup(phys, size); | |
389 | if (map) { | |
b7c1fadd | 390 | map->refcount++; |
7ffd0443 RW |
391 | goto out; |
392 | } | |
393 | ||
620242ae | 394 | map = kzalloc(sizeof(*map), GFP_KERNEL); |
7ffd0443 RW |
395 | if (!map) { |
396 | mutex_unlock(&acpi_ioremap_lock); | |
620242ae | 397 | return NULL; |
7ffd0443 | 398 | } |
620242ae | 399 | |
4a3cba5e MS |
400 | pg_off = round_down(phys, PAGE_SIZE); |
401 | pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off; | |
ba242d5b | 402 | virt = acpi_map(pg_off, pg_sz); |
620242ae | 403 | if (!virt) { |
7ffd0443 | 404 | mutex_unlock(&acpi_ioremap_lock); |
620242ae MS |
405 | kfree(map); |
406 | return NULL; | |
407 | } | |
408 | ||
409 | INIT_LIST_HEAD(&map->list); | |
410 | map->virt = virt; | |
4a3cba5e MS |
411 | map->phys = pg_off; |
412 | map->size = pg_sz; | |
b7c1fadd | 413 | map->refcount = 1; |
620242ae | 414 | |
78cdb3ed | 415 | list_add_tail_rcu(&map->list, &acpi_ioremaps); |
620242ae | 416 | |
a238317c | 417 | out: |
7ffd0443 | 418 | mutex_unlock(&acpi_ioremap_lock); |
4a3cba5e | 419 | return map->virt + (phys - map->phys); |
1da177e4 | 420 | } |
a238317c LZ |
421 | EXPORT_SYMBOL_GPL(acpi_os_map_iomem); |
422 | ||
423 | void *__init_refok | |
424 | acpi_os_map_memory(acpi_physical_address phys, acpi_size size) | |
425 | { | |
426 | return (void *)acpi_os_map_iomem(phys, size); | |
427 | } | |
55a82ab3 | 428 | EXPORT_SYMBOL_GPL(acpi_os_map_memory); |
1da177e4 | 429 | |
b7c1fadd | 430 | static void acpi_os_drop_map_ref(struct acpi_ioremap *map) |
4a3cba5e | 431 | { |
b7c1fadd RW |
432 | if (!--map->refcount) |
433 | list_del_rcu(&map->list); | |
4a3cba5e | 434 | } |
4a3cba5e | 435 | |
b7c1fadd | 436 | static void acpi_os_map_cleanup(struct acpi_ioremap *map) |
7fe135dc | 437 | { |
b7c1fadd | 438 | if (!map->refcount) { |
74b51ee1 | 439 | synchronize_rcu_expedited(); |
ba242d5b | 440 | acpi_unmap(map->phys, map->virt); |
b7c1fadd RW |
441 | kfree(map); |
442 | } | |
4a3cba5e MS |
443 | } |
444 | ||
a238317c | 445 | void __ref acpi_os_unmap_iomem(void __iomem *virt, acpi_size size) |
1da177e4 | 446 | { |
620242ae | 447 | struct acpi_ioremap *map; |
620242ae MS |
448 | |
449 | if (!acpi_gbl_permanent_mmap) { | |
7d97277b | 450 | __acpi_unmap_table(virt, size); |
620242ae MS |
451 | return; |
452 | } | |
453 | ||
7bbb8903 | 454 | mutex_lock(&acpi_ioremap_lock); |
620242ae MS |
455 | map = acpi_map_lookup_virt(virt, size); |
456 | if (!map) { | |
7bbb8903 | 457 | mutex_unlock(&acpi_ioremap_lock); |
7fe135dc | 458 | WARN(true, PREFIX "%s: bad address %p\n", __func__, virt); |
620242ae MS |
459 | return; |
460 | } | |
b7c1fadd | 461 | acpi_os_drop_map_ref(map); |
7bbb8903 | 462 | mutex_unlock(&acpi_ioremap_lock); |
620242ae | 463 | |
b7c1fadd | 464 | acpi_os_map_cleanup(map); |
1da177e4 | 465 | } |
a238317c LZ |
466 | EXPORT_SYMBOL_GPL(acpi_os_unmap_iomem); |
467 | ||
468 | void __ref acpi_os_unmap_memory(void *virt, acpi_size size) | |
469 | { | |
470 | return acpi_os_unmap_iomem((void __iomem *)virt, size); | |
471 | } | |
55a82ab3 | 472 | EXPORT_SYMBOL_GPL(acpi_os_unmap_memory); |
1da177e4 | 473 | |
0d3a9cf5 | 474 | void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size) |
7d97277b YL |
475 | { |
476 | if (!acpi_gbl_permanent_mmap) | |
477 | __acpi_unmap_table(virt, size); | |
478 | } | |
479 | ||
6f68c91c | 480 | int acpi_os_map_generic_address(struct acpi_generic_address *gas) |
29718521 | 481 | { |
bc9ffce2 | 482 | u64 addr; |
29718521 MS |
483 | void __iomem *virt; |
484 | ||
bc9ffce2 | 485 | if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) |
29718521 MS |
486 | return 0; |
487 | ||
bc9ffce2 MS |
488 | /* Handle possible alignment issues */ |
489 | memcpy(&addr, &gas->address, sizeof(addr)); | |
490 | if (!addr || !gas->bit_width) | |
29718521 MS |
491 | return -EINVAL; |
492 | ||
a238317c | 493 | virt = acpi_os_map_iomem(addr, gas->bit_width / 8); |
29718521 MS |
494 | if (!virt) |
495 | return -EIO; | |
496 | ||
497 | return 0; | |
498 | } | |
6f68c91c | 499 | EXPORT_SYMBOL(acpi_os_map_generic_address); |
29718521 | 500 | |
6f68c91c | 501 | void acpi_os_unmap_generic_address(struct acpi_generic_address *gas) |
29718521 | 502 | { |
bc9ffce2 | 503 | u64 addr; |
7fe135dc | 504 | struct acpi_ioremap *map; |
29718521 | 505 | |
bc9ffce2 | 506 | if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) |
29718521 MS |
507 | return; |
508 | ||
bc9ffce2 MS |
509 | /* Handle possible alignment issues */ |
510 | memcpy(&addr, &gas->address, sizeof(addr)); | |
511 | if (!addr || !gas->bit_width) | |
29718521 MS |
512 | return; |
513 | ||
7bbb8903 | 514 | mutex_lock(&acpi_ioremap_lock); |
bc9ffce2 | 515 | map = acpi_map_lookup(addr, gas->bit_width / 8); |
7fe135dc RW |
516 | if (!map) { |
517 | mutex_unlock(&acpi_ioremap_lock); | |
518 | return; | |
519 | } | |
b7c1fadd | 520 | acpi_os_drop_map_ref(map); |
7bbb8903 | 521 | mutex_unlock(&acpi_ioremap_lock); |
29718521 | 522 | |
b7c1fadd | 523 | acpi_os_map_cleanup(map); |
29718521 | 524 | } |
6f68c91c | 525 | EXPORT_SYMBOL(acpi_os_unmap_generic_address); |
29718521 | 526 | |
1da177e4 LT |
527 | #ifdef ACPI_FUTURE_USAGE |
528 | acpi_status | |
4be44fcd | 529 | acpi_os_get_physical_address(void *virt, acpi_physical_address * phys) |
1da177e4 | 530 | { |
4be44fcd | 531 | if (!phys || !virt) |
1da177e4 LT |
532 | return AE_BAD_PARAMETER; |
533 | ||
534 | *phys = virt_to_phys(virt); | |
535 | ||
536 | return AE_OK; | |
537 | } | |
538 | #endif | |
539 | ||
18d78b64 RW |
540 | #ifdef CONFIG_ACPI_REV_OVERRIDE_POSSIBLE |
541 | static bool acpi_rev_override; | |
542 | ||
543 | int __init acpi_rev_override_setup(char *str) | |
544 | { | |
545 | acpi_rev_override = true; | |
546 | return 1; | |
547 | } | |
548 | __setup("acpi_rev_override", acpi_rev_override_setup); | |
549 | #else | |
550 | #define acpi_rev_override false | |
551 | #endif | |
552 | ||
1da177e4 LT |
553 | #define ACPI_MAX_OVERRIDE_LEN 100 |
554 | ||
555 | static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN]; | |
556 | ||
557 | acpi_status | |
4be44fcd | 558 | acpi_os_predefined_override(const struct acpi_predefined_names *init_val, |
2bad7e27 | 559 | char **new_val) |
1da177e4 LT |
560 | { |
561 | if (!init_val || !new_val) | |
562 | return AE_BAD_PARAMETER; | |
563 | ||
564 | *new_val = NULL; | |
4be44fcd | 565 | if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) { |
1da177e4 | 566 | printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n", |
4be44fcd | 567 | acpi_os_name); |
1da177e4 LT |
568 | *new_val = acpi_os_name; |
569 | } | |
570 | ||
18d78b64 RW |
571 | if (!memcmp(init_val->name, "_REV", 4) && acpi_rev_override) { |
572 | printk(KERN_INFO PREFIX "Overriding _REV return value to 5\n"); | |
573 | *new_val = (char *)5; | |
574 | } | |
575 | ||
1da177e4 LT |
576 | return AE_OK; |
577 | } | |
578 | ||
53aac44c TR |
579 | #ifdef CONFIG_ACPI_INITRD_TABLE_OVERRIDE |
580 | #include <linux/earlycpio.h> | |
581 | #include <linux/memblock.h> | |
582 | ||
583 | static u64 acpi_tables_addr; | |
584 | static int all_tables_size; | |
585 | ||
586 | /* Copied from acpica/tbutils.c:acpi_tb_checksum() */ | |
66e162b3 | 587 | static u8 __init acpi_table_checksum(u8 *buffer, u32 length) |
53aac44c TR |
588 | { |
589 | u8 sum = 0; | |
590 | u8 *end = buffer + length; | |
591 | ||
592 | while (buffer < end) | |
593 | sum = (u8) (sum + *(buffer++)); | |
594 | return sum; | |
595 | } | |
596 | ||
597 | /* All but ACPI_SIG_RSDP and ACPI_SIG_FACS: */ | |
598 | static const char * const table_sigs[] = { | |
599 | ACPI_SIG_BERT, ACPI_SIG_CPEP, ACPI_SIG_ECDT, ACPI_SIG_EINJ, | |
600 | ACPI_SIG_ERST, ACPI_SIG_HEST, ACPI_SIG_MADT, ACPI_SIG_MSCT, | |
601 | ACPI_SIG_SBST, ACPI_SIG_SLIT, ACPI_SIG_SRAT, ACPI_SIG_ASF, | |
602 | ACPI_SIG_BOOT, ACPI_SIG_DBGP, ACPI_SIG_DMAR, ACPI_SIG_HPET, | |
603 | ACPI_SIG_IBFT, ACPI_SIG_IVRS, ACPI_SIG_MCFG, ACPI_SIG_MCHI, | |
604 | ACPI_SIG_SLIC, ACPI_SIG_SPCR, ACPI_SIG_SPMI, ACPI_SIG_TCPA, | |
605 | ACPI_SIG_UEFI, ACPI_SIG_WAET, ACPI_SIG_WDAT, ACPI_SIG_WDDT, | |
606 | ACPI_SIG_WDRT, ACPI_SIG_DSDT, ACPI_SIG_FADT, ACPI_SIG_PSDT, | |
607 | ACPI_SIG_RSDT, ACPI_SIG_XSDT, ACPI_SIG_SSDT, NULL }; | |
608 | ||
53aac44c TR |
609 | #define ACPI_HEADER_SIZE sizeof(struct acpi_table_header) |
610 | ||
bee7f9c8 YL |
611 | #define ACPI_OVERRIDE_TABLES 64 |
612 | static struct cpio_data __initdata acpi_initrd_files[ACPI_OVERRIDE_TABLES]; | |
613 | ||
614 | #define MAP_CHUNK_SIZE (NR_FIX_BTMAPS << PAGE_SHIFT) | |
53aac44c TR |
615 | |
616 | void __init acpi_initrd_override(void *data, size_t size) | |
617 | { | |
618 | int sig, no, table_nr = 0, total_offset = 0; | |
619 | long offset = 0; | |
620 | struct acpi_table_header *table; | |
621 | char cpio_path[32] = "kernel/firmware/acpi/"; | |
622 | struct cpio_data file; | |
53aac44c TR |
623 | |
624 | if (data == NULL || size == 0) | |
625 | return; | |
626 | ||
627 | for (no = 0; no < ACPI_OVERRIDE_TABLES; no++) { | |
628 | file = find_cpio_data(cpio_path, data, size, &offset); | |
629 | if (!file.data) | |
630 | break; | |
631 | ||
632 | data += offset; | |
633 | size -= offset; | |
634 | ||
7702ae0d TC |
635 | if (file.size < sizeof(struct acpi_table_header)) { |
636 | pr_err("ACPI OVERRIDE: Table smaller than ACPI header [%s%s]\n", | |
637 | cpio_path, file.name); | |
638 | continue; | |
639 | } | |
53aac44c TR |
640 | |
641 | table = file.data; | |
642 | ||
643 | for (sig = 0; table_sigs[sig]; sig++) | |
644 | if (!memcmp(table->signature, table_sigs[sig], 4)) | |
645 | break; | |
646 | ||
7702ae0d TC |
647 | if (!table_sigs[sig]) { |
648 | pr_err("ACPI OVERRIDE: Unknown signature [%s%s]\n", | |
649 | cpio_path, file.name); | |
650 | continue; | |
651 | } | |
652 | if (file.size != table->length) { | |
653 | pr_err("ACPI OVERRIDE: File length does not match table length [%s%s]\n", | |
654 | cpio_path, file.name); | |
655 | continue; | |
656 | } | |
657 | if (acpi_table_checksum(file.data, table->length)) { | |
658 | pr_err("ACPI OVERRIDE: Bad table checksum [%s%s]\n", | |
659 | cpio_path, file.name); | |
660 | continue; | |
661 | } | |
53aac44c TR |
662 | |
663 | pr_info("%4.4s ACPI table found in initrd [%s%s][0x%x]\n", | |
664 | table->signature, cpio_path, file.name, table->length); | |
665 | ||
666 | all_tables_size += table->length; | |
bee7f9c8 YL |
667 | acpi_initrd_files[table_nr].data = file.data; |
668 | acpi_initrd_files[table_nr].size = file.size; | |
53aac44c TR |
669 | table_nr++; |
670 | } | |
671 | if (table_nr == 0) | |
672 | return; | |
673 | ||
674 | acpi_tables_addr = | |
675 | memblock_find_in_range(0, max_low_pfn_mapped << PAGE_SHIFT, | |
676 | all_tables_size, PAGE_SIZE); | |
677 | if (!acpi_tables_addr) { | |
678 | WARN_ON(1); | |
679 | return; | |
680 | } | |
681 | /* | |
682 | * Only calling e820_add_reserve does not work and the | |
683 | * tables are invalid (memory got used) later. | |
684 | * memblock_reserve works as expected and the tables won't get modified. | |
685 | * But it's not enough on X86 because ioremap will | |
686 | * complain later (used by acpi_os_map_memory) that the pages | |
687 | * that should get mapped are not marked "reserved". | |
688 | * Both memblock_reserve and e820_add_region (via arch_reserve_mem_area) | |
689 | * works fine. | |
690 | */ | |
a6432ded | 691 | memblock_reserve(acpi_tables_addr, all_tables_size); |
53aac44c TR |
692 | arch_reserve_mem_area(acpi_tables_addr, all_tables_size); |
693 | ||
bee7f9c8 YL |
694 | /* |
695 | * early_ioremap only can remap 256k one time. If we map all | |
696 | * tables one time, we will hit the limit. Need to map chunks | |
697 | * one by one during copying the same as that in relocate_initrd(). | |
698 | */ | |
53aac44c | 699 | for (no = 0; no < table_nr; no++) { |
bee7f9c8 YL |
700 | unsigned char *src_p = acpi_initrd_files[no].data; |
701 | phys_addr_t size = acpi_initrd_files[no].size; | |
702 | phys_addr_t dest_addr = acpi_tables_addr + total_offset; | |
703 | phys_addr_t slop, clen; | |
704 | char *dest_p; | |
705 | ||
706 | total_offset += size; | |
707 | ||
708 | while (size) { | |
709 | slop = dest_addr & ~PAGE_MASK; | |
710 | clen = size; | |
711 | if (clen > MAP_CHUNK_SIZE - slop) | |
712 | clen = MAP_CHUNK_SIZE - slop; | |
713 | dest_p = early_ioremap(dest_addr & PAGE_MASK, | |
714 | clen + slop); | |
715 | memcpy(dest_p + slop, src_p, clen); | |
716 | early_iounmap(dest_p, clen + slop); | |
717 | src_p += clen; | |
718 | dest_addr += clen; | |
719 | size -= clen; | |
720 | } | |
53aac44c | 721 | } |
53aac44c TR |
722 | } |
723 | #endif /* CONFIG_ACPI_INITRD_TABLE_OVERRIDE */ | |
724 | ||
325a8d36 TR |
725 | static void acpi_table_taint(struct acpi_table_header *table) |
726 | { | |
727 | pr_warn(PREFIX | |
728 | "Override [%4.4s-%8.8s], this is unsafe: tainting kernel\n", | |
729 | table->signature, table->oem_table_id); | |
373d4d09 | 730 | add_taint(TAINT_OVERRIDDEN_ACPI_TABLE, LOCKDEP_NOW_UNRELIABLE); |
325a8d36 TR |
731 | } |
732 | ||
733 | ||
1da177e4 | 734 | acpi_status |
4be44fcd LB |
735 | acpi_os_table_override(struct acpi_table_header * existing_table, |
736 | struct acpi_table_header ** new_table) | |
1da177e4 LT |
737 | { |
738 | if (!existing_table || !new_table) | |
739 | return AE_BAD_PARAMETER; | |
740 | ||
71fc47a9 MG |
741 | *new_table = NULL; |
742 | ||
1da177e4 LT |
743 | #ifdef CONFIG_ACPI_CUSTOM_DSDT |
744 | if (strncmp(existing_table->signature, "DSDT", 4) == 0) | |
4be44fcd | 745 | *new_table = (struct acpi_table_header *)AmlCode; |
1da177e4 | 746 | #endif |
325a8d36 TR |
747 | if (*new_table != NULL) |
748 | acpi_table_taint(existing_table); | |
1da177e4 LT |
749 | return AE_OK; |
750 | } | |
751 | ||
f7b004a1 BM |
752 | acpi_status |
753 | acpi_os_physical_table_override(struct acpi_table_header *existing_table, | |
b2a35003 TR |
754 | acpi_physical_address *address, |
755 | u32 *table_length) | |
f7b004a1 | 756 | { |
b2a35003 TR |
757 | #ifndef CONFIG_ACPI_INITRD_TABLE_OVERRIDE |
758 | *table_length = 0; | |
759 | *address = 0; | |
760 | return AE_OK; | |
761 | #else | |
762 | int table_offset = 0; | |
763 | struct acpi_table_header *table; | |
764 | ||
765 | *table_length = 0; | |
766 | *address = 0; | |
767 | ||
768 | if (!acpi_tables_addr) | |
769 | return AE_OK; | |
770 | ||
771 | do { | |
772 | if (table_offset + ACPI_HEADER_SIZE > all_tables_size) { | |
773 | WARN_ON(1); | |
774 | return AE_OK; | |
775 | } | |
776 | ||
777 | table = acpi_os_map_memory(acpi_tables_addr + table_offset, | |
778 | ACPI_HEADER_SIZE); | |
f7b004a1 | 779 | |
b2a35003 TR |
780 | if (table_offset + table->length > all_tables_size) { |
781 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
782 | WARN_ON(1); | |
783 | return AE_OK; | |
784 | } | |
785 | ||
786 | table_offset += table->length; | |
787 | ||
788 | if (memcmp(existing_table->signature, table->signature, 4)) { | |
789 | acpi_os_unmap_memory(table, | |
790 | ACPI_HEADER_SIZE); | |
791 | continue; | |
792 | } | |
793 | ||
794 | /* Only override tables with matching oem id */ | |
795 | if (memcmp(table->oem_table_id, existing_table->oem_table_id, | |
796 | ACPI_OEM_TABLE_ID_SIZE)) { | |
797 | acpi_os_unmap_memory(table, | |
798 | ACPI_HEADER_SIZE); | |
799 | continue; | |
800 | } | |
801 | ||
802 | table_offset -= table->length; | |
803 | *table_length = table->length; | |
804 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
805 | *address = acpi_tables_addr + table_offset; | |
806 | break; | |
807 | } while (table_offset + ACPI_HEADER_SIZE < all_tables_size); | |
f7b004a1 | 808 | |
325a8d36 TR |
809 | if (*address != 0) |
810 | acpi_table_taint(existing_table); | |
b2a35003 TR |
811 | return AE_OK; |
812 | #endif | |
813 | } | |
f7b004a1 | 814 | |
7d12e780 | 815 | static irqreturn_t acpi_irq(int irq, void *dev_id) |
1da177e4 | 816 | { |
5229e87d LB |
817 | u32 handled; |
818 | ||
819 | handled = (*acpi_irq_handler) (acpi_irq_context); | |
820 | ||
821 | if (handled) { | |
822 | acpi_irq_handled++; | |
823 | return IRQ_HANDLED; | |
88bea188 LB |
824 | } else { |
825 | acpi_irq_not_handled++; | |
5229e87d | 826 | return IRQ_NONE; |
88bea188 | 827 | } |
1da177e4 LT |
828 | } |
829 | ||
830 | acpi_status | |
4be44fcd LB |
831 | acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler, |
832 | void *context) | |
1da177e4 LT |
833 | { |
834 | unsigned int irq; | |
835 | ||
5229e87d LB |
836 | acpi_irq_stats_init(); |
837 | ||
1da177e4 | 838 | /* |
23fe3630 RW |
839 | * ACPI interrupts different from the SCI in our copy of the FADT are |
840 | * not supported. | |
1da177e4 | 841 | */ |
23fe3630 RW |
842 | if (gsi != acpi_gbl_FADT.sci_interrupt) |
843 | return AE_BAD_PARAMETER; | |
844 | ||
845 | if (acpi_irq_handler) | |
846 | return AE_ALREADY_ACQUIRED; | |
847 | ||
1da177e4 LT |
848 | if (acpi_gsi_to_irq(gsi, &irq) < 0) { |
849 | printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n", | |
850 | gsi); | |
851 | return AE_OK; | |
852 | } | |
853 | ||
854 | acpi_irq_handler = handler; | |
855 | acpi_irq_context = context; | |
a8d46b9e | 856 | if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) { |
1da177e4 | 857 | printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq); |
23fe3630 | 858 | acpi_irq_handler = NULL; |
1da177e4 LT |
859 | return AE_NOT_ACQUIRED; |
860 | } | |
1da177e4 LT |
861 | |
862 | return AE_OK; | |
863 | } | |
864 | ||
4be44fcd | 865 | acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler) |
1da177e4 | 866 | { |
23fe3630 RW |
867 | if (irq != acpi_gbl_FADT.sci_interrupt) |
868 | return AE_BAD_PARAMETER; | |
869 | ||
870 | free_irq(irq, acpi_irq); | |
871 | acpi_irq_handler = NULL; | |
1da177e4 LT |
872 | |
873 | return AE_OK; | |
874 | } | |
875 | ||
876 | /* | |
877 | * Running in interpreter thread context, safe to sleep | |
878 | */ | |
879 | ||
439913ff | 880 | void acpi_os_sleep(u64 ms) |
1da177e4 | 881 | { |
30282299 | 882 | msleep(ms); |
1da177e4 | 883 | } |
4be44fcd | 884 | |
4be44fcd | 885 | void acpi_os_stall(u32 us) |
1da177e4 LT |
886 | { |
887 | while (us) { | |
888 | u32 delay = 1000; | |
889 | ||
890 | if (delay > us) | |
891 | delay = us; | |
892 | udelay(delay); | |
893 | touch_nmi_watchdog(); | |
894 | us -= delay; | |
895 | } | |
896 | } | |
4be44fcd | 897 | |
1da177e4 LT |
898 | /* |
899 | * Support ACPI 3.0 AML Timer operand | |
900 | * Returns 64-bit free-running, monotonically increasing timer | |
901 | * with 100ns granularity | |
902 | */ | |
4be44fcd | 903 | u64 acpi_os_get_timer(void) |
1da177e4 | 904 | { |
10619066 MW |
905 | u64 time_ns = ktime_to_ns(ktime_get()); |
906 | do_div(time_ns, 100); | |
907 | return time_ns; | |
1da177e4 LT |
908 | } |
909 | ||
4be44fcd | 910 | acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width) |
1da177e4 LT |
911 | { |
912 | u32 dummy; | |
913 | ||
914 | if (!value) | |
915 | value = &dummy; | |
916 | ||
49fbabf5 ZY |
917 | *value = 0; |
918 | if (width <= 8) { | |
4be44fcd | 919 | *(u8 *) value = inb(port); |
49fbabf5 | 920 | } else if (width <= 16) { |
4be44fcd | 921 | *(u16 *) value = inw(port); |
49fbabf5 | 922 | } else if (width <= 32) { |
4be44fcd | 923 | *(u32 *) value = inl(port); |
49fbabf5 | 924 | } else { |
1da177e4 LT |
925 | BUG(); |
926 | } | |
927 | ||
928 | return AE_OK; | |
929 | } | |
4be44fcd | 930 | |
1da177e4 LT |
931 | EXPORT_SYMBOL(acpi_os_read_port); |
932 | ||
4be44fcd | 933 | acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width) |
1da177e4 | 934 | { |
49fbabf5 | 935 | if (width <= 8) { |
1da177e4 | 936 | outb(value, port); |
49fbabf5 | 937 | } else if (width <= 16) { |
1da177e4 | 938 | outw(value, port); |
49fbabf5 | 939 | } else if (width <= 32) { |
1da177e4 | 940 | outl(value, port); |
49fbabf5 | 941 | } else { |
1da177e4 LT |
942 | BUG(); |
943 | } | |
944 | ||
945 | return AE_OK; | |
946 | } | |
4be44fcd | 947 | |
1da177e4 LT |
948 | EXPORT_SYMBOL(acpi_os_write_port); |
949 | ||
e615bf5b MS |
950 | #ifdef readq |
951 | static inline u64 read64(const volatile void __iomem *addr) | |
952 | { | |
953 | return readq(addr); | |
954 | } | |
955 | #else | |
956 | static inline u64 read64(const volatile void __iomem *addr) | |
957 | { | |
958 | u64 l, h; | |
959 | l = readl(addr); | |
960 | h = readl(addr+4); | |
961 | return l | (h << 32); | |
962 | } | |
963 | #endif | |
964 | ||
965 | acpi_status | |
653f4b53 | 966 | acpi_os_read_memory(acpi_physical_address phys_addr, u64 *value, u32 width) |
e615bf5b MS |
967 | { |
968 | void __iomem *virt_addr; | |
969 | unsigned int size = width / 8; | |
970 | bool unmap = false; | |
971 | u64 dummy; | |
972 | ||
973 | rcu_read_lock(); | |
974 | virt_addr = acpi_map_vaddr_lookup(phys_addr, size); | |
975 | if (!virt_addr) { | |
976 | rcu_read_unlock(); | |
977 | virt_addr = acpi_os_ioremap(phys_addr, size); | |
978 | if (!virt_addr) | |
979 | return AE_BAD_ADDRESS; | |
980 | unmap = true; | |
981 | } | |
982 | ||
983 | if (!value) | |
984 | value = &dummy; | |
985 | ||
986 | switch (width) { | |
987 | case 8: | |
988 | *(u8 *) value = readb(virt_addr); | |
989 | break; | |
990 | case 16: | |
991 | *(u16 *) value = readw(virt_addr); | |
992 | break; | |
993 | case 32: | |
994 | *(u32 *) value = readl(virt_addr); | |
995 | break; | |
996 | case 64: | |
997 | *(u64 *) value = read64(virt_addr); | |
998 | break; | |
999 | default: | |
1000 | BUG(); | |
1001 | } | |
1002 | ||
1003 | if (unmap) | |
1004 | iounmap(virt_addr); | |
1005 | else | |
1006 | rcu_read_unlock(); | |
1007 | ||
1008 | return AE_OK; | |
1009 | } | |
1010 | ||
e615bf5b MS |
1011 | #ifdef writeq |
1012 | static inline void write64(u64 val, volatile void __iomem *addr) | |
1013 | { | |
1014 | writeq(val, addr); | |
1015 | } | |
1016 | #else | |
1017 | static inline void write64(u64 val, volatile void __iomem *addr) | |
1018 | { | |
1019 | writel(val, addr); | |
1020 | writel(val>>32, addr+4); | |
1021 | } | |
1022 | #endif | |
1023 | ||
1024 | acpi_status | |
653f4b53 | 1025 | acpi_os_write_memory(acpi_physical_address phys_addr, u64 value, u32 width) |
e615bf5b MS |
1026 | { |
1027 | void __iomem *virt_addr; | |
1028 | unsigned int size = width / 8; | |
1029 | bool unmap = false; | |
1030 | ||
1031 | rcu_read_lock(); | |
1032 | virt_addr = acpi_map_vaddr_lookup(phys_addr, size); | |
1033 | if (!virt_addr) { | |
1034 | rcu_read_unlock(); | |
1035 | virt_addr = acpi_os_ioremap(phys_addr, size); | |
1036 | if (!virt_addr) | |
1037 | return AE_BAD_ADDRESS; | |
1038 | unmap = true; | |
1039 | } | |
1040 | ||
1041 | switch (width) { | |
1042 | case 8: | |
1043 | writeb(value, virt_addr); | |
1044 | break; | |
1045 | case 16: | |
1046 | writew(value, virt_addr); | |
1047 | break; | |
1048 | case 32: | |
1049 | writel(value, virt_addr); | |
1050 | break; | |
1051 | case 64: | |
1052 | write64(value, virt_addr); | |
1053 | break; | |
1054 | default: | |
1055 | BUG(); | |
1056 | } | |
1057 | ||
1058 | if (unmap) | |
1059 | iounmap(virt_addr); | |
1060 | else | |
1061 | rcu_read_unlock(); | |
1062 | ||
1063 | return AE_OK; | |
1064 | } | |
1065 | ||
1da177e4 | 1066 | acpi_status |
4be44fcd | 1067 | acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
c5f0231e | 1068 | u64 *value, u32 width) |
1da177e4 LT |
1069 | { |
1070 | int result, size; | |
c5f0231e | 1071 | u32 value32; |
1da177e4 LT |
1072 | |
1073 | if (!value) | |
1074 | return AE_BAD_PARAMETER; | |
1075 | ||
1076 | switch (width) { | |
1077 | case 8: | |
1078 | size = 1; | |
1079 | break; | |
1080 | case 16: | |
1081 | size = 2; | |
1082 | break; | |
1083 | case 32: | |
1084 | size = 4; | |
1085 | break; | |
1086 | default: | |
1087 | return AE_ERROR; | |
1088 | } | |
1089 | ||
b6ce068a MW |
1090 | result = raw_pci_read(pci_id->segment, pci_id->bus, |
1091 | PCI_DEVFN(pci_id->device, pci_id->function), | |
c5f0231e BM |
1092 | reg, size, &value32); |
1093 | *value = value32; | |
1da177e4 LT |
1094 | |
1095 | return (result ? AE_ERROR : AE_OK); | |
1096 | } | |
4be44fcd | 1097 | |
1da177e4 | 1098 | acpi_status |
4be44fcd | 1099 | acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
439913ff | 1100 | u64 value, u32 width) |
1da177e4 LT |
1101 | { |
1102 | int result, size; | |
1103 | ||
1104 | switch (width) { | |
1105 | case 8: | |
1106 | size = 1; | |
1107 | break; | |
1108 | case 16: | |
1109 | size = 2; | |
1110 | break; | |
1111 | case 32: | |
1112 | size = 4; | |
1113 | break; | |
1114 | default: | |
1115 | return AE_ERROR; | |
1116 | } | |
1117 | ||
b6ce068a MW |
1118 | result = raw_pci_write(pci_id->segment, pci_id->bus, |
1119 | PCI_DEVFN(pci_id->device, pci_id->function), | |
1120 | reg, size, value); | |
1da177e4 LT |
1121 | |
1122 | return (result ? AE_ERROR : AE_OK); | |
1123 | } | |
1124 | ||
65f27f38 | 1125 | static void acpi_os_execute_deferred(struct work_struct *work) |
88db5e14 AS |
1126 | { |
1127 | struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work); | |
88db5e14 | 1128 | |
19cd847a ZR |
1129 | dpc->function(dpc->context); |
1130 | kfree(dpc); | |
19cd847a ZR |
1131 | } |
1132 | ||
b8d35192 AS |
1133 | /******************************************************************************* |
1134 | * | |
1135 | * FUNCTION: acpi_os_execute | |
1136 | * | |
1137 | * PARAMETERS: Type - Type of the callback | |
1138 | * Function - Function to be executed | |
1139 | * Context - Function parameters | |
1140 | * | |
1141 | * RETURN: Status | |
1142 | * | |
1143 | * DESCRIPTION: Depending on type, either queues function for deferred execution or | |
1144 | * immediately executes function on a separate thread. | |
1145 | * | |
1146 | ******************************************************************************/ | |
1147 | ||
7b98118a RW |
1148 | acpi_status acpi_os_execute(acpi_execute_type type, |
1149 | acpi_osd_exec_callback function, void *context) | |
1da177e4 | 1150 | { |
4be44fcd LB |
1151 | acpi_status status = AE_OK; |
1152 | struct acpi_os_dpc *dpc; | |
17bc54ee | 1153 | struct workqueue_struct *queue; |
19cd847a | 1154 | int ret; |
72945b2b LB |
1155 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
1156 | "Scheduling function [%p(%p)] for deferred execution.\n", | |
1157 | function, context)); | |
1da177e4 | 1158 | |
1da177e4 LT |
1159 | /* |
1160 | * Allocate/initialize DPC structure. Note that this memory will be | |
65f27f38 | 1161 | * freed by the callee. The kernel handles the work_struct list in a |
1da177e4 LT |
1162 | * way that allows us to also free its memory inside the callee. |
1163 | * Because we may want to schedule several tasks with different | |
1164 | * parameters we can't use the approach some kernel code uses of | |
65f27f38 | 1165 | * having a static work_struct. |
1da177e4 | 1166 | */ |
72945b2b | 1167 | |
3ae45a27 | 1168 | dpc = kzalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC); |
1da177e4 | 1169 | if (!dpc) |
889c78be | 1170 | return AE_NO_MEMORY; |
b976fe19 | 1171 | |
1da177e4 LT |
1172 | dpc->function = function; |
1173 | dpc->context = context; | |
b976fe19 | 1174 | |
c02256be | 1175 | /* |
3ae45a27 RW |
1176 | * To prevent lockdep from complaining unnecessarily, make sure that |
1177 | * there is a different static lockdep key for each workqueue by using | |
1178 | * INIT_WORK() for each of them separately. | |
c02256be | 1179 | */ |
7b98118a | 1180 | if (type == OSL_NOTIFY_HANDLER) { |
3ae45a27 | 1181 | queue = kacpi_notify_wq; |
bc73675b | 1182 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); |
3ae45a27 RW |
1183 | } else { |
1184 | queue = kacpid_wq; | |
bc73675b | 1185 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); |
3ae45a27 | 1186 | } |
bc73675b | 1187 | |
8fec62b2 TH |
1188 | /* |
1189 | * On some machines, a software-initiated SMI causes corruption unless | |
1190 | * the SMI runs on CPU 0. An SMI can be initiated by any AML, but | |
1191 | * typically it's done in GPE-related methods that are run via | |
1192 | * workqueues, so we can avoid the known corruption cases by always | |
1193 | * queueing on CPU 0. | |
1194 | */ | |
1195 | ret = queue_work_on(0, queue, &dpc->work); | |
19cd847a ZR |
1196 | |
1197 | if (!ret) { | |
55ac9a01 LM |
1198 | printk(KERN_ERR PREFIX |
1199 | "Call to queue_work() failed.\n"); | |
17bc54ee AS |
1200 | status = AE_ERROR; |
1201 | kfree(dpc); | |
1da177e4 | 1202 | } |
889c78be | 1203 | return status; |
1da177e4 | 1204 | } |
7b98118a | 1205 | EXPORT_SYMBOL(acpi_os_execute); |
4be44fcd | 1206 | |
7b98118a | 1207 | void acpi_os_wait_events_complete(void) |
19cd847a | 1208 | { |
90253a79 LZ |
1209 | /* |
1210 | * Make sure the GPE handler or the fixed event handler is not used | |
1211 | * on another CPU after removal. | |
1212 | */ | |
1213 | if (acpi_irq_handler) | |
1214 | synchronize_hardirq(acpi_gbl_FADT.sci_interrupt); | |
7b98118a RW |
1215 | flush_workqueue(kacpid_wq); |
1216 | flush_workqueue(kacpi_notify_wq); | |
19cd847a | 1217 | } |
1da177e4 | 1218 | |
7b98118a RW |
1219 | struct acpi_hp_work { |
1220 | struct work_struct work; | |
1e3bcb59 | 1221 | struct acpi_device *adev; |
7b98118a RW |
1222 | u32 src; |
1223 | }; | |
1224 | ||
1225 | static void acpi_hotplug_work_fn(struct work_struct *work) | |
19cd847a | 1226 | { |
7b98118a RW |
1227 | struct acpi_hp_work *hpw = container_of(work, struct acpi_hp_work, work); |
1228 | ||
1229 | acpi_os_wait_events_complete(); | |
1e3bcb59 | 1230 | acpi_device_hotplug(hpw->adev, hpw->src); |
7b98118a | 1231 | kfree(hpw); |
19cd847a ZR |
1232 | } |
1233 | ||
1e3bcb59 | 1234 | acpi_status acpi_hotplug_schedule(struct acpi_device *adev, u32 src) |
1da177e4 | 1235 | { |
7b98118a RW |
1236 | struct acpi_hp_work *hpw; |
1237 | ||
1238 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, | |
1e3bcb59 RW |
1239 | "Scheduling hotplug event (%p, %u) for deferred execution.\n", |
1240 | adev, src)); | |
7b98118a RW |
1241 | |
1242 | hpw = kmalloc(sizeof(*hpw), GFP_KERNEL); | |
1243 | if (!hpw) | |
1244 | return AE_NO_MEMORY; | |
1245 | ||
1246 | INIT_WORK(&hpw->work, acpi_hotplug_work_fn); | |
1e3bcb59 | 1247 | hpw->adev = adev; |
7b98118a RW |
1248 | hpw->src = src; |
1249 | /* | |
1250 | * We can't run hotplug code in kacpid_wq/kacpid_notify_wq etc., because | |
1251 | * the hotplug code may call driver .remove() functions, which may | |
1252 | * invoke flush_scheduled_work()/acpi_os_wait_events_complete() to flush | |
1253 | * these workqueues. | |
1254 | */ | |
1255 | if (!queue_work(kacpi_hotplug_wq, &hpw->work)) { | |
1256 | kfree(hpw); | |
1257 | return AE_ERROR; | |
1258 | } | |
1259 | return AE_OK; | |
1da177e4 | 1260 | } |
4be44fcd | 1261 | |
d783156e RW |
1262 | bool acpi_queue_hotplug_work(struct work_struct *work) |
1263 | { | |
1264 | return queue_work(kacpi_hotplug_wq, work); | |
1265 | } | |
1da177e4 | 1266 | |
1da177e4 | 1267 | acpi_status |
4be44fcd | 1268 | acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle) |
1da177e4 | 1269 | { |
4be44fcd | 1270 | struct semaphore *sem = NULL; |
1da177e4 | 1271 | |
2d0acb4a | 1272 | sem = acpi_os_allocate_zeroed(sizeof(struct semaphore)); |
1da177e4 | 1273 | if (!sem) |
d550d98d | 1274 | return AE_NO_MEMORY; |
1da177e4 LT |
1275 | |
1276 | sema_init(sem, initial_units); | |
1277 | ||
4be44fcd | 1278 | *handle = (acpi_handle *) sem; |
1da177e4 | 1279 | |
4be44fcd LB |
1280 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n", |
1281 | *handle, initial_units)); | |
1da177e4 | 1282 | |
d550d98d | 1283 | return AE_OK; |
1da177e4 | 1284 | } |
1da177e4 | 1285 | |
1da177e4 LT |
1286 | /* |
1287 | * TODO: A better way to delete semaphores? Linux doesn't have a | |
1288 | * 'delete_semaphore()' function -- may result in an invalid | |
1289 | * pointer dereference for non-synchronized consumers. Should | |
1290 | * we at least check for blocked threads and signal/cancel them? | |
1291 | */ | |
1292 | ||
4be44fcd | 1293 | acpi_status acpi_os_delete_semaphore(acpi_handle handle) |
1da177e4 | 1294 | { |
4be44fcd | 1295 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 1296 | |
1da177e4 | 1297 | if (!sem) |
d550d98d | 1298 | return AE_BAD_PARAMETER; |
1da177e4 | 1299 | |
4be44fcd | 1300 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle)); |
1da177e4 | 1301 | |
f1241c87 | 1302 | BUG_ON(!list_empty(&sem->wait_list)); |
02438d87 | 1303 | kfree(sem); |
4be44fcd | 1304 | sem = NULL; |
1da177e4 | 1305 | |
d550d98d | 1306 | return AE_OK; |
1da177e4 | 1307 | } |
1da177e4 | 1308 | |
1da177e4 | 1309 | /* |
1da177e4 LT |
1310 | * TODO: Support for units > 1? |
1311 | */ | |
4be44fcd | 1312 | acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout) |
1da177e4 | 1313 | { |
4be44fcd LB |
1314 | acpi_status status = AE_OK; |
1315 | struct semaphore *sem = (struct semaphore *)handle; | |
f1241c87 | 1316 | long jiffies; |
4be44fcd | 1317 | int ret = 0; |
1da177e4 | 1318 | |
1da177e4 | 1319 | if (!sem || (units < 1)) |
d550d98d | 1320 | return AE_BAD_PARAMETER; |
1da177e4 LT |
1321 | |
1322 | if (units > 1) | |
d550d98d | 1323 | return AE_SUPPORT; |
1da177e4 | 1324 | |
4be44fcd LB |
1325 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n", |
1326 | handle, units, timeout)); | |
1da177e4 | 1327 | |
f1241c87 MW |
1328 | if (timeout == ACPI_WAIT_FOREVER) |
1329 | jiffies = MAX_SCHEDULE_TIMEOUT; | |
1330 | else | |
1331 | jiffies = msecs_to_jiffies(timeout); | |
cad1525a | 1332 | |
f1241c87 MW |
1333 | ret = down_timeout(sem, jiffies); |
1334 | if (ret) | |
1335 | status = AE_TIME; | |
1da177e4 LT |
1336 | |
1337 | if (ACPI_FAILURE(status)) { | |
9e7e2c04 | 1338 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, |
a6fc6720 | 1339 | "Failed to acquire semaphore[%p|%d|%d], %s", |
4be44fcd LB |
1340 | handle, units, timeout, |
1341 | acpi_format_exception(status))); | |
1342 | } else { | |
1343 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, | |
a6fc6720 | 1344 | "Acquired semaphore[%p|%d|%d]", handle, |
4be44fcd | 1345 | units, timeout)); |
1da177e4 LT |
1346 | } |
1347 | ||
d550d98d | 1348 | return status; |
1da177e4 | 1349 | } |
1da177e4 | 1350 | |
1da177e4 LT |
1351 | /* |
1352 | * TODO: Support for units > 1? | |
1353 | */ | |
4be44fcd | 1354 | acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units) |
1da177e4 | 1355 | { |
4be44fcd | 1356 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 1357 | |
1da177e4 | 1358 | if (!sem || (units < 1)) |
d550d98d | 1359 | return AE_BAD_PARAMETER; |
1da177e4 LT |
1360 | |
1361 | if (units > 1) | |
d550d98d | 1362 | return AE_SUPPORT; |
1da177e4 | 1363 | |
4be44fcd LB |
1364 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle, |
1365 | units)); | |
1da177e4 LT |
1366 | |
1367 | up(sem); | |
1368 | ||
d550d98d | 1369 | return AE_OK; |
1da177e4 | 1370 | } |
4be44fcd | 1371 | |
1da177e4 | 1372 | #ifdef ACPI_FUTURE_USAGE |
4be44fcd | 1373 | u32 acpi_os_get_line(char *buffer) |
1da177e4 LT |
1374 | { |
1375 | ||
1376 | #ifdef ENABLE_DEBUGGER | |
1377 | if (acpi_in_debugger) { | |
1378 | u32 chars; | |
1379 | ||
1380 | kdb_read(buffer, sizeof(line_buf)); | |
1381 | ||
1382 | /* remove the CR kdb includes */ | |
1383 | chars = strlen(buffer) - 1; | |
1384 | buffer[chars] = '\0'; | |
1385 | } | |
1386 | #endif | |
1387 | ||
1388 | return 0; | |
1389 | } | |
4be44fcd | 1390 | #endif /* ACPI_FUTURE_USAGE */ |
1da177e4 | 1391 | |
4be44fcd | 1392 | acpi_status acpi_os_signal(u32 function, void *info) |
1da177e4 | 1393 | { |
4be44fcd | 1394 | switch (function) { |
1da177e4 LT |
1395 | case ACPI_SIGNAL_FATAL: |
1396 | printk(KERN_ERR PREFIX "Fatal opcode executed\n"); | |
1397 | break; | |
1398 | case ACPI_SIGNAL_BREAKPOINT: | |
1399 | /* | |
1400 | * AML Breakpoint | |
1401 | * ACPI spec. says to treat it as a NOP unless | |
1402 | * you are debugging. So if/when we integrate | |
1403 | * AML debugger into the kernel debugger its | |
1404 | * hook will go here. But until then it is | |
1405 | * not useful to print anything on breakpoints. | |
1406 | */ | |
1407 | break; | |
1408 | default: | |
1409 | break; | |
1410 | } | |
1411 | ||
1412 | return AE_OK; | |
1413 | } | |
4be44fcd | 1414 | |
4be44fcd | 1415 | static int __init acpi_os_name_setup(char *str) |
1da177e4 LT |
1416 | { |
1417 | char *p = acpi_os_name; | |
4be44fcd | 1418 | int count = ACPI_MAX_OVERRIDE_LEN - 1; |
1da177e4 LT |
1419 | |
1420 | if (!str || !*str) | |
1421 | return 0; | |
1422 | ||
5e2be4e0 | 1423 | for (; count-- && *str; str++) { |
1da177e4 LT |
1424 | if (isalnum(*str) || *str == ' ' || *str == ':') |
1425 | *p++ = *str; | |
1426 | else if (*str == '\'' || *str == '"') | |
1427 | continue; | |
1428 | else | |
1429 | break; | |
1430 | } | |
1431 | *p = 0; | |
1432 | ||
1433 | return 1; | |
4be44fcd | 1434 | |
1da177e4 LT |
1435 | } |
1436 | ||
1437 | __setup("acpi_os_name=", acpi_os_name_setup); | |
1438 | ||
12d32064 LM |
1439 | #define OSI_STRING_LENGTH_MAX 64 /* arbitrary */ |
1440 | #define OSI_STRING_ENTRIES_MAX 16 /* arbitrary */ | |
1441 | ||
1442 | struct osi_setup_entry { | |
1443 | char string[OSI_STRING_LENGTH_MAX]; | |
1444 | bool enable; | |
1445 | }; | |
1446 | ||
e73d3136 HG |
1447 | static struct osi_setup_entry |
1448 | osi_setup_entries[OSI_STRING_ENTRIES_MAX] __initdata = { | |
aa165971 SL |
1449 | {"Module Device", true}, |
1450 | {"Processor Device", true}, | |
1451 | {"3.0 _SCP Extensions", true}, | |
1452 | {"Processor Aggregator Device", true}, | |
1453 | }; | |
12d32064 | 1454 | |
d90aa92c LM |
1455 | void __init acpi_osi_setup(char *str) |
1456 | { | |
12d32064 LM |
1457 | struct osi_setup_entry *osi; |
1458 | bool enable = true; | |
1459 | int i; | |
1460 | ||
d90aa92c LM |
1461 | if (!acpi_gbl_create_osi_method) |
1462 | return; | |
1463 | ||
1464 | if (str == NULL || *str == '\0') { | |
1465 | printk(KERN_INFO PREFIX "_OSI method disabled\n"); | |
1466 | acpi_gbl_create_osi_method = FALSE; | |
12d32064 LM |
1467 | return; |
1468 | } | |
1469 | ||
1470 | if (*str == '!') { | |
1471 | str++; | |
5dc17986 LZ |
1472 | if (*str == '\0') { |
1473 | osi_linux.default_disabling = 1; | |
1474 | return; | |
741d8128 LZ |
1475 | } else if (*str == '*') { |
1476 | acpi_update_interfaces(ACPI_DISABLE_ALL_STRINGS); | |
1477 | for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { | |
1478 | osi = &osi_setup_entries[i]; | |
1479 | osi->enable = false; | |
1480 | } | |
1481 | return; | |
5dc17986 | 1482 | } |
12d32064 LM |
1483 | enable = false; |
1484 | } | |
1485 | ||
1486 | for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { | |
1487 | osi = &osi_setup_entries[i]; | |
1488 | if (!strcmp(osi->string, str)) { | |
1489 | osi->enable = enable; | |
1490 | break; | |
1491 | } else if (osi->string[0] == '\0') { | |
1492 | osi->enable = enable; | |
1493 | strncpy(osi->string, str, OSI_STRING_LENGTH_MAX); | |
1494 | break; | |
1495 | } | |
1496 | } | |
d90aa92c LM |
1497 | } |
1498 | ||
d4b7dc49 LB |
1499 | static void __init set_osi_linux(unsigned int enable) |
1500 | { | |
d90aa92c | 1501 | if (osi_linux.enable != enable) |
d4b7dc49 | 1502 | osi_linux.enable = enable; |
b0ed7a91 LM |
1503 | |
1504 | if (osi_linux.enable) | |
1505 | acpi_osi_setup("Linux"); | |
1506 | else | |
1507 | acpi_osi_setup("!Linux"); | |
1508 | ||
d4b7dc49 LB |
1509 | return; |
1510 | } | |
1511 | ||
1512 | static void __init acpi_cmdline_osi_linux(unsigned int enable) | |
1513 | { | |
d90aa92c LM |
1514 | osi_linux.cmdline = 1; /* cmdline set the default and override DMI */ |
1515 | osi_linux.dmi = 0; | |
d4b7dc49 LB |
1516 | set_osi_linux(enable); |
1517 | ||
1518 | return; | |
1519 | } | |
1520 | ||
1521 | void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d) | |
1522 | { | |
d4b7dc49 LB |
1523 | printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident); |
1524 | ||
1525 | if (enable == -1) | |
1526 | return; | |
1527 | ||
d90aa92c | 1528 | osi_linux.dmi = 1; /* DMI knows that this box asks OSI(Linux) */ |
d4b7dc49 | 1529 | set_osi_linux(enable); |
f507654d | 1530 | |
f507654d LB |
1531 | return; |
1532 | } | |
1533 | ||
1da177e4 | 1534 | /* |
ae00d812 LB |
1535 | * Modify the list of "OS Interfaces" reported to BIOS via _OSI |
1536 | * | |
1da177e4 | 1537 | * empty string disables _OSI |
ae00d812 LB |
1538 | * string starting with '!' disables that string |
1539 | * otherwise string is added to list, augmenting built-in strings | |
1da177e4 | 1540 | */ |
b0ed7a91 | 1541 | static void __init acpi_osi_setup_late(void) |
1da177e4 | 1542 | { |
12d32064 LM |
1543 | struct osi_setup_entry *osi; |
1544 | char *str; | |
1545 | int i; | |
d90aa92c | 1546 | acpi_status status; |
b0ed7a91 | 1547 | |
5dc17986 LZ |
1548 | if (osi_linux.default_disabling) { |
1549 | status = acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS); | |
1550 | ||
1551 | if (ACPI_SUCCESS(status)) | |
1552 | printk(KERN_INFO PREFIX "Disabled all _OSI OS vendors\n"); | |
1553 | } | |
1554 | ||
12d32064 LM |
1555 | for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { |
1556 | osi = &osi_setup_entries[i]; | |
1557 | str = osi->string; | |
b0ed7a91 | 1558 | |
12d32064 LM |
1559 | if (*str == '\0') |
1560 | break; | |
1561 | if (osi->enable) { | |
1562 | status = acpi_install_interface(str); | |
d90aa92c | 1563 | |
12d32064 LM |
1564 | if (ACPI_SUCCESS(status)) |
1565 | printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str); | |
1566 | } else { | |
1567 | status = acpi_remove_interface(str); | |
d90aa92c | 1568 | |
12d32064 LM |
1569 | if (ACPI_SUCCESS(status)) |
1570 | printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str); | |
1571 | } | |
b0ed7a91 LM |
1572 | } |
1573 | } | |
1574 | ||
d90aa92c | 1575 | static int __init osi_setup(char *str) |
b0ed7a91 | 1576 | { |
d90aa92c LM |
1577 | if (str && !strcmp("Linux", str)) |
1578 | acpi_cmdline_osi_linux(1); | |
1579 | else if (str && !strcmp("!Linux", str)) | |
1580 | acpi_cmdline_osi_linux(0); | |
1581 | else | |
1582 | acpi_osi_setup(str); | |
1da177e4 LT |
1583 | |
1584 | return 1; | |
1585 | } | |
1586 | ||
d90aa92c | 1587 | __setup("acpi_osi=", osi_setup); |
1da177e4 | 1588 | |
22b5afce | 1589 | /* |
08e1d7c0 | 1590 | * Disable the auto-serialization of named objects creation methods. |
22b5afce | 1591 | * |
08e1d7c0 | 1592 | * This feature is enabled by default. It marks the AML control methods |
22b5afce BM |
1593 | * that contain the opcodes to create named objects as "Serialized". |
1594 | */ | |
08e1d7c0 | 1595 | static int __init acpi_no_auto_serialize_setup(char *str) |
1da177e4 | 1596 | { |
08e1d7c0 LZ |
1597 | acpi_gbl_auto_serialize_methods = FALSE; |
1598 | pr_info("ACPI: auto-serialization disabled\n"); | |
1da177e4 LT |
1599 | |
1600 | return 1; | |
1601 | } | |
1602 | ||
08e1d7c0 | 1603 | __setup("acpi_no_auto_serialize", acpi_no_auto_serialize_setup); |
1da177e4 | 1604 | |
df92e695 TR |
1605 | /* Check of resource interference between native drivers and ACPI |
1606 | * OperationRegions (SystemIO and System Memory only). | |
1607 | * IO ports and memory declared in ACPI might be used by the ACPI subsystem | |
1608 | * in arbitrary AML code and can interfere with legacy drivers. | |
1609 | * acpi_enforce_resources= can be set to: | |
1610 | * | |
7e90560c | 1611 | * - strict (default) (2) |
df92e695 | 1612 | * -> further driver trying to access the resources will not load |
7e90560c | 1613 | * - lax (1) |
df92e695 TR |
1614 | * -> further driver trying to access the resources will load, but you |
1615 | * get a system message that something might go wrong... | |
1616 | * | |
1617 | * - no (0) | |
1618 | * -> ACPI Operation Region resources will not be registered | |
1619 | * | |
1620 | */ | |
1621 | #define ENFORCE_RESOURCES_STRICT 2 | |
1622 | #define ENFORCE_RESOURCES_LAX 1 | |
1623 | #define ENFORCE_RESOURCES_NO 0 | |
1624 | ||
7e90560c | 1625 | static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; |
df92e695 TR |
1626 | |
1627 | static int __init acpi_enforce_resources_setup(char *str) | |
1628 | { | |
1629 | if (str == NULL || *str == '\0') | |
1630 | return 0; | |
1631 | ||
1632 | if (!strcmp("strict", str)) | |
1633 | acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; | |
1634 | else if (!strcmp("lax", str)) | |
1635 | acpi_enforce_resources = ENFORCE_RESOURCES_LAX; | |
1636 | else if (!strcmp("no", str)) | |
1637 | acpi_enforce_resources = ENFORCE_RESOURCES_NO; | |
1638 | ||
1639 | return 1; | |
1640 | } | |
1641 | ||
1642 | __setup("acpi_enforce_resources=", acpi_enforce_resources_setup); | |
1643 | ||
1644 | /* Check for resource conflicts between ACPI OperationRegions and native | |
1645 | * drivers */ | |
876fba43 | 1646 | int acpi_check_resource_conflict(const struct resource *res) |
df92e695 | 1647 | { |
f654c0fe LM |
1648 | acpi_adr_space_type space_id; |
1649 | acpi_size length; | |
1650 | u8 warn = 0; | |
1651 | int clash = 0; | |
df92e695 TR |
1652 | |
1653 | if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) | |
1654 | return 0; | |
1655 | if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM)) | |
1656 | return 0; | |
1657 | ||
f654c0fe LM |
1658 | if (res->flags & IORESOURCE_IO) |
1659 | space_id = ACPI_ADR_SPACE_SYSTEM_IO; | |
1660 | else | |
1661 | space_id = ACPI_ADR_SPACE_SYSTEM_MEMORY; | |
df92e695 | 1662 | |
e4f52244 | 1663 | length = resource_size(res); |
f654c0fe LM |
1664 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) |
1665 | warn = 1; | |
1666 | clash = acpi_check_address_range(space_id, res->start, length, warn); | |
df92e695 TR |
1667 | |
1668 | if (clash) { | |
1669 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) { | |
14f03343 JD |
1670 | if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX) |
1671 | printk(KERN_NOTICE "ACPI: This conflict may" | |
1672 | " cause random problems and system" | |
1673 | " instability\n"); | |
1674 | printk(KERN_INFO "ACPI: If an ACPI driver is available" | |
1675 | " for this device, you should use it instead of" | |
1676 | " the native driver\n"); | |
df92e695 TR |
1677 | } |
1678 | if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT) | |
1679 | return -EBUSY; | |
1680 | } | |
1681 | return 0; | |
1682 | } | |
443dea72 | 1683 | EXPORT_SYMBOL(acpi_check_resource_conflict); |
df92e695 TR |
1684 | |
1685 | int acpi_check_region(resource_size_t start, resource_size_t n, | |
1686 | const char *name) | |
1687 | { | |
1688 | struct resource res = { | |
1689 | .start = start, | |
1690 | .end = start + n - 1, | |
1691 | .name = name, | |
1692 | .flags = IORESOURCE_IO, | |
1693 | }; | |
1694 | ||
1695 | return acpi_check_resource_conflict(&res); | |
1696 | } | |
1697 | EXPORT_SYMBOL(acpi_check_region); | |
1698 | ||
70dd6bea JD |
1699 | /* |
1700 | * Let drivers know whether the resource checks are effective | |
1701 | */ | |
1702 | int acpi_resources_are_enforced(void) | |
1703 | { | |
1704 | return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT; | |
1705 | } | |
1706 | EXPORT_SYMBOL(acpi_resources_are_enforced); | |
1707 | ||
a87878ba HG |
1708 | bool acpi_osi_is_win8(void) |
1709 | { | |
1710 | return acpi_gbl_osi_data >= ACPI_OSI_WIN_8; | |
1711 | } | |
1712 | EXPORT_SYMBOL(acpi_osi_is_win8); | |
1713 | ||
9f63b88b LM |
1714 | /* |
1715 | * Deallocate the memory for a spinlock. | |
1716 | */ | |
1717 | void acpi_os_delete_lock(acpi_spinlock handle) | |
1718 | { | |
1719 | ACPI_FREE(handle); | |
1720 | } | |
1721 | ||
73459f73 RM |
1722 | /* |
1723 | * Acquire a spinlock. | |
1724 | * | |
1725 | * handle is a pointer to the spinlock_t. | |
73459f73 RM |
1726 | */ |
1727 | ||
967440e3 | 1728 | acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp) |
73459f73 | 1729 | { |
b8e4d893 | 1730 | acpi_cpu_flags flags; |
967440e3 | 1731 | spin_lock_irqsave(lockp, flags); |
73459f73 RM |
1732 | return flags; |
1733 | } | |
1734 | ||
1735 | /* | |
1736 | * Release a spinlock. See above. | |
1737 | */ | |
1738 | ||
967440e3 | 1739 | void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags) |
73459f73 | 1740 | { |
967440e3 | 1741 | spin_unlock_irqrestore(lockp, flags); |
73459f73 RM |
1742 | } |
1743 | ||
73459f73 RM |
1744 | #ifndef ACPI_USE_LOCAL_CACHE |
1745 | ||
1746 | /******************************************************************************* | |
1747 | * | |
1748 | * FUNCTION: acpi_os_create_cache | |
1749 | * | |
b229cf92 BM |
1750 | * PARAMETERS: name - Ascii name for the cache |
1751 | * size - Size of each cached object | |
1752 | * depth - Maximum depth of the cache (in objects) <ignored> | |
1753 | * cache - Where the new cache object is returned | |
73459f73 | 1754 | * |
b229cf92 | 1755 | * RETURN: status |
73459f73 RM |
1756 | * |
1757 | * DESCRIPTION: Create a cache object | |
1758 | * | |
1759 | ******************************************************************************/ | |
1760 | ||
1761 | acpi_status | |
4be44fcd | 1762 | acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache) |
73459f73 | 1763 | { |
20c2df83 | 1764 | *cache = kmem_cache_create(name, size, 0, 0, NULL); |
a6fdbf90 | 1765 | if (*cache == NULL) |
b229cf92 BM |
1766 | return AE_ERROR; |
1767 | else | |
1768 | return AE_OK; | |
73459f73 RM |
1769 | } |
1770 | ||
1771 | /******************************************************************************* | |
1772 | * | |
1773 | * FUNCTION: acpi_os_purge_cache | |
1774 | * | |
1775 | * PARAMETERS: Cache - Handle to cache object | |
1776 | * | |
1777 | * RETURN: Status | |
1778 | * | |
1779 | * DESCRIPTION: Free all objects within the requested cache. | |
1780 | * | |
1781 | ******************************************************************************/ | |
1782 | ||
4be44fcd | 1783 | acpi_status acpi_os_purge_cache(acpi_cache_t * cache) |
73459f73 | 1784 | { |
50dd0969 | 1785 | kmem_cache_shrink(cache); |
4be44fcd | 1786 | return (AE_OK); |
73459f73 RM |
1787 | } |
1788 | ||
1789 | /******************************************************************************* | |
1790 | * | |
1791 | * FUNCTION: acpi_os_delete_cache | |
1792 | * | |
1793 | * PARAMETERS: Cache - Handle to cache object | |
1794 | * | |
1795 | * RETURN: Status | |
1796 | * | |
1797 | * DESCRIPTION: Free all objects within the requested cache and delete the | |
1798 | * cache object. | |
1799 | * | |
1800 | ******************************************************************************/ | |
1801 | ||
4be44fcd | 1802 | acpi_status acpi_os_delete_cache(acpi_cache_t * cache) |
73459f73 | 1803 | { |
1a1d92c1 | 1804 | kmem_cache_destroy(cache); |
4be44fcd | 1805 | return (AE_OK); |
73459f73 RM |
1806 | } |
1807 | ||
1808 | /******************************************************************************* | |
1809 | * | |
1810 | * FUNCTION: acpi_os_release_object | |
1811 | * | |
1812 | * PARAMETERS: Cache - Handle to cache object | |
1813 | * Object - The object to be released | |
1814 | * | |
1815 | * RETURN: None | |
1816 | * | |
1817 | * DESCRIPTION: Release an object to the specified cache. If cache is full, | |
1818 | * the object is deleted. | |
1819 | * | |
1820 | ******************************************************************************/ | |
1821 | ||
4be44fcd | 1822 | acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object) |
73459f73 | 1823 | { |
4be44fcd LB |
1824 | kmem_cache_free(cache, object); |
1825 | return (AE_OK); | |
73459f73 | 1826 | } |
73459f73 | 1827 | #endif |
d362edaf | 1828 | |
a94e88cd | 1829 | static int __init acpi_no_static_ssdt_setup(char *s) |
b75dd297 | 1830 | { |
a94e88cd LZ |
1831 | acpi_gbl_disable_ssdt_table_install = TRUE; |
1832 | pr_info("ACPI: static SSDT installation disabled\n"); | |
b75dd297 | 1833 | |
a94e88cd | 1834 | return 0; |
b75dd297 LZ |
1835 | } |
1836 | ||
a94e88cd | 1837 | early_param("acpi_no_static_ssdt", acpi_no_static_ssdt_setup); |
b75dd297 | 1838 | |
4dde507f LZ |
1839 | static int __init acpi_disable_return_repair(char *s) |
1840 | { | |
1841 | printk(KERN_NOTICE PREFIX | |
1842 | "ACPI: Predefined validation mechanism disabled\n"); | |
1843 | acpi_gbl_disable_auto_repair = TRUE; | |
1844 | ||
1845 | return 1; | |
1846 | } | |
1847 | ||
1848 | __setup("acpica_no_return_repair", acpi_disable_return_repair); | |
1849 | ||
d362edaf MS |
1850 | acpi_status __init acpi_os_initialize(void) |
1851 | { | |
1852 | acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block); | |
1853 | acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block); | |
1854 | acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block); | |
1855 | acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block); | |
a4714a89 RW |
1856 | if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) { |
1857 | /* | |
1858 | * Use acpi_os_map_generic_address to pre-map the reset | |
1859 | * register if it's in system memory. | |
1860 | */ | |
1861 | int rv; | |
1862 | ||
1863 | rv = acpi_os_map_generic_address(&acpi_gbl_FADT.reset_register); | |
1864 | pr_debug(PREFIX "%s: map reset_reg status %d\n", __func__, rv); | |
1865 | } | |
d362edaf MS |
1866 | |
1867 | return AE_OK; | |
1868 | } | |
1869 | ||
32d47eef | 1870 | acpi_status __init acpi_os_initialize1(void) |
d362edaf | 1871 | { |
44d2588e TH |
1872 | kacpid_wq = alloc_workqueue("kacpid", 0, 1); |
1873 | kacpi_notify_wq = alloc_workqueue("kacpi_notify", 0, 1); | |
d783156e | 1874 | kacpi_hotplug_wq = alloc_ordered_workqueue("kacpi_hotplug", 0); |
d362edaf MS |
1875 | BUG_ON(!kacpid_wq); |
1876 | BUG_ON(!kacpi_notify_wq); | |
1877 | BUG_ON(!kacpi_hotplug_wq); | |
1bd64d42 LB |
1878 | acpi_install_interface_handler(acpi_osi_handler); |
1879 | acpi_osi_setup_late(); | |
d362edaf MS |
1880 | return AE_OK; |
1881 | } | |
1882 | ||
1883 | acpi_status acpi_os_terminate(void) | |
1884 | { | |
1885 | if (acpi_irq_handler) { | |
23fe3630 | 1886 | acpi_os_remove_interrupt_handler(acpi_gbl_FADT.sci_interrupt, |
d362edaf MS |
1887 | acpi_irq_handler); |
1888 | } | |
1889 | ||
1890 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe1_block); | |
1891 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block); | |
1892 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block); | |
1893 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block); | |
a4714a89 RW |
1894 | if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) |
1895 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.reset_register); | |
d362edaf MS |
1896 | |
1897 | destroy_workqueue(kacpid_wq); | |
1898 | destroy_workqueue(kacpi_notify_wq); | |
1899 | destroy_workqueue(kacpi_hotplug_wq); | |
1900 | ||
1901 | return AE_OK; | |
1902 | } | |
09f98a82 TL |
1903 | |
1904 | acpi_status acpi_os_prepare_sleep(u8 sleep_state, u32 pm1a_control, | |
1905 | u32 pm1b_control) | |
1906 | { | |
1907 | int rc = 0; | |
1908 | if (__acpi_os_prepare_sleep) | |
1909 | rc = __acpi_os_prepare_sleep(sleep_state, | |
1910 | pm1a_control, pm1b_control); | |
1911 | if (rc < 0) | |
1912 | return AE_ERROR; | |
1913 | else if (rc > 0) | |
1914 | return AE_CTRL_SKIP; | |
1915 | ||
1916 | return AE_OK; | |
1917 | } | |
1918 | ||
1919 | void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state, | |
1920 | u32 pm1a_ctrl, u32 pm1b_ctrl)) | |
1921 | { | |
1922 | __acpi_os_prepare_sleep = func; | |
1923 | } | |
92d8aff3 | 1924 | |
d6b47b12 BG |
1925 | acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state, u32 val_a, |
1926 | u32 val_b) | |
1927 | { | |
1928 | int rc = 0; | |
1929 | if (__acpi_os_prepare_extended_sleep) | |
1930 | rc = __acpi_os_prepare_extended_sleep(sleep_state, | |
1931 | val_a, val_b); | |
1932 | if (rc < 0) | |
1933 | return AE_ERROR; | |
1934 | else if (rc > 0) | |
1935 | return AE_CTRL_SKIP; | |
1936 | ||
1937 | return AE_OK; | |
1938 | } | |
1939 | ||
1940 | void acpi_os_set_prepare_extended_sleep(int (*func)(u8 sleep_state, | |
1941 | u32 val_a, u32 val_b)) | |
1942 | { | |
1943 | __acpi_os_prepare_extended_sleep = func; | |
1944 | } |