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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 | ||
0f1b414d | 178 | acpi_reserve_region(addr, length, gas->space_id, 0, desc); |
9a47cdb1 BH |
179 | } |
180 | ||
b9a5e5e1 | 181 | static void __init acpi_reserve_resources(void) |
9a47cdb1 | 182 | { |
eee3c859 | 183 | acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
184 | "ACPI PM1a_EVT_BLK"); |
185 | ||
eee3c859 | 186 | acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
187 | "ACPI PM1b_EVT_BLK"); |
188 | ||
eee3c859 | 189 | acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
190 | "ACPI PM1a_CNT_BLK"); |
191 | ||
eee3c859 | 192 | acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
193 | "ACPI PM1b_CNT_BLK"); |
194 | ||
eee3c859 LB |
195 | if (acpi_gbl_FADT.pm_timer_length == 4) |
196 | acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR"); | |
9a47cdb1 | 197 | |
eee3c859 | 198 | acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length, |
9a47cdb1 BH |
199 | "ACPI PM2_CNT_BLK"); |
200 | ||
201 | /* Length of GPE blocks must be a non-negative multiple of 2 */ | |
202 | ||
eee3c859 LB |
203 | if (!(acpi_gbl_FADT.gpe0_block_length & 0x1)) |
204 | acpi_request_region(&acpi_gbl_FADT.xgpe0_block, | |
205 | acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK"); | |
9a47cdb1 | 206 | |
eee3c859 LB |
207 | if (!(acpi_gbl_FADT.gpe1_block_length & 0x1)) |
208 | acpi_request_region(&acpi_gbl_FADT.xgpe1_block, | |
209 | acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK"); | |
9a47cdb1 | 210 | } |
9a47cdb1 | 211 | |
4be44fcd | 212 | void acpi_os_printf(const char *fmt, ...) |
1da177e4 LT |
213 | { |
214 | va_list args; | |
215 | va_start(args, fmt); | |
216 | acpi_os_vprintf(fmt, args); | |
217 | va_end(args); | |
218 | } | |
4be44fcd | 219 | |
4be44fcd | 220 | void acpi_os_vprintf(const char *fmt, va_list args) |
1da177e4 LT |
221 | { |
222 | static char buffer[512]; | |
4be44fcd | 223 | |
1da177e4 LT |
224 | vsprintf(buffer, fmt, args); |
225 | ||
226 | #ifdef ENABLE_DEBUGGER | |
227 | if (acpi_in_debugger) { | |
228 | kdb_printf("%s", buffer); | |
229 | } else { | |
4d939155 | 230 | printk(KERN_CONT "%s", buffer); |
1da177e4 LT |
231 | } |
232 | #else | |
4d939155 | 233 | printk(KERN_CONT "%s", buffer); |
1da177e4 LT |
234 | #endif |
235 | } | |
236 | ||
4996c023 TI |
237 | #ifdef CONFIG_KEXEC |
238 | static unsigned long acpi_rsdp; | |
239 | static int __init setup_acpi_rsdp(char *arg) | |
240 | { | |
3d915894 CJ |
241 | if (kstrtoul(arg, 16, &acpi_rsdp)) |
242 | return -EINVAL; | |
4996c023 TI |
243 | return 0; |
244 | } | |
245 | early_param("acpi_rsdp", setup_acpi_rsdp); | |
246 | #endif | |
247 | ||
ad71860a | 248 | acpi_physical_address __init acpi_os_get_root_pointer(void) |
1da177e4 | 249 | { |
4996c023 TI |
250 | #ifdef CONFIG_KEXEC |
251 | if (acpi_rsdp) | |
252 | return acpi_rsdp; | |
253 | #endif | |
254 | ||
83e68189 | 255 | if (efi_enabled(EFI_CONFIG_TABLES)) { |
b2c99e3c | 256 | if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) |
ad71860a | 257 | return efi.acpi20; |
b2c99e3c | 258 | else if (efi.acpi != EFI_INVALID_TABLE_ADDR) |
ad71860a | 259 | return efi.acpi; |
1da177e4 | 260 | else { |
4be44fcd LB |
261 | printk(KERN_ERR PREFIX |
262 | "System description tables not found\n"); | |
ad71860a | 263 | return 0; |
1da177e4 | 264 | } |
8a1664be | 265 | } else if (IS_ENABLED(CONFIG_ACPI_LEGACY_TABLES_LOOKUP)) { |
239665a3 LB |
266 | acpi_physical_address pa = 0; |
267 | ||
268 | acpi_find_root_pointer(&pa); | |
269 | return pa; | |
270 | } | |
8a1664be GG |
271 | |
272 | return 0; | |
1da177e4 LT |
273 | } |
274 | ||
78cdb3ed | 275 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ |
4a3cba5e MS |
276 | static struct acpi_ioremap * |
277 | acpi_map_lookup(acpi_physical_address phys, acpi_size size) | |
620242ae MS |
278 | { |
279 | struct acpi_ioremap *map; | |
280 | ||
78cdb3ed | 281 | list_for_each_entry_rcu(map, &acpi_ioremaps, list) |
620242ae MS |
282 | if (map->phys <= phys && |
283 | phys + size <= map->phys + map->size) | |
4a3cba5e MS |
284 | return map; |
285 | ||
286 | return NULL; | |
287 | } | |
288 | ||
289 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ | |
290 | static void __iomem * | |
291 | acpi_map_vaddr_lookup(acpi_physical_address phys, unsigned int size) | |
292 | { | |
293 | struct acpi_ioremap *map; | |
294 | ||
295 | map = acpi_map_lookup(phys, size); | |
296 | if (map) | |
297 | return map->virt + (phys - map->phys); | |
620242ae MS |
298 | |
299 | return NULL; | |
300 | } | |
301 | ||
13606a2d RW |
302 | void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size) |
303 | { | |
304 | struct acpi_ioremap *map; | |
305 | void __iomem *virt = NULL; | |
306 | ||
307 | mutex_lock(&acpi_ioremap_lock); | |
308 | map = acpi_map_lookup(phys, size); | |
309 | if (map) { | |
310 | virt = map->virt + (phys - map->phys); | |
311 | map->refcount++; | |
312 | } | |
313 | mutex_unlock(&acpi_ioremap_lock); | |
314 | return virt; | |
315 | } | |
316 | EXPORT_SYMBOL_GPL(acpi_os_get_iomem); | |
317 | ||
78cdb3ed | 318 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ |
620242ae MS |
319 | static struct acpi_ioremap * |
320 | acpi_map_lookup_virt(void __iomem *virt, acpi_size size) | |
321 | { | |
322 | struct acpi_ioremap *map; | |
323 | ||
78cdb3ed | 324 | list_for_each_entry_rcu(map, &acpi_ioremaps, list) |
4a3cba5e MS |
325 | if (map->virt <= virt && |
326 | virt + size <= map->virt + map->size) | |
620242ae MS |
327 | return map; |
328 | ||
329 | return NULL; | |
330 | } | |
331 | ||
aafc65c7 | 332 | #if defined(CONFIG_IA64) || defined(CONFIG_ARM64) |
ba242d5b MS |
333 | /* ioremap will take care of cache attributes */ |
334 | #define should_use_kmap(pfn) 0 | |
aafc65c7 GG |
335 | #else |
336 | #define should_use_kmap(pfn) page_is_ram(pfn) | |
ba242d5b MS |
337 | #endif |
338 | ||
339 | static void __iomem *acpi_map(acpi_physical_address pg_off, unsigned long pg_sz) | |
340 | { | |
341 | unsigned long pfn; | |
342 | ||
343 | pfn = pg_off >> PAGE_SHIFT; | |
344 | if (should_use_kmap(pfn)) { | |
345 | if (pg_sz > PAGE_SIZE) | |
346 | return NULL; | |
347 | return (void __iomem __force *)kmap(pfn_to_page(pfn)); | |
348 | } else | |
349 | return acpi_os_ioremap(pg_off, pg_sz); | |
350 | } | |
351 | ||
352 | static void acpi_unmap(acpi_physical_address pg_off, void __iomem *vaddr) | |
353 | { | |
354 | unsigned long pfn; | |
355 | ||
356 | pfn = pg_off >> PAGE_SHIFT; | |
e252675f | 357 | if (should_use_kmap(pfn)) |
ba242d5b MS |
358 | kunmap(pfn_to_page(pfn)); |
359 | else | |
360 | iounmap(vaddr); | |
361 | } | |
362 | ||
2fdf0741 | 363 | void __iomem *__init_refok |
a238317c | 364 | acpi_os_map_iomem(acpi_physical_address phys, acpi_size size) |
1da177e4 | 365 | { |
7ffd0443 | 366 | struct acpi_ioremap *map; |
620242ae | 367 | void __iomem *virt; |
2d6d9fd3 RW |
368 | acpi_physical_address pg_off; |
369 | acpi_size pg_sz; | |
620242ae | 370 | |
9f4fd61f BH |
371 | if (phys > ULONG_MAX) { |
372 | printk(KERN_ERR PREFIX "Cannot map memory that high\n"); | |
70c0846e | 373 | return NULL; |
1da177e4 | 374 | } |
620242ae MS |
375 | |
376 | if (!acpi_gbl_permanent_mmap) | |
ad71860a | 377 | return __acpi_map_table((unsigned long)phys, size); |
620242ae | 378 | |
7ffd0443 RW |
379 | mutex_lock(&acpi_ioremap_lock); |
380 | /* Check if there's a suitable mapping already. */ | |
381 | map = acpi_map_lookup(phys, size); | |
382 | if (map) { | |
b7c1fadd | 383 | map->refcount++; |
7ffd0443 RW |
384 | goto out; |
385 | } | |
386 | ||
620242ae | 387 | map = kzalloc(sizeof(*map), GFP_KERNEL); |
7ffd0443 RW |
388 | if (!map) { |
389 | mutex_unlock(&acpi_ioremap_lock); | |
620242ae | 390 | return NULL; |
7ffd0443 | 391 | } |
620242ae | 392 | |
4a3cba5e MS |
393 | pg_off = round_down(phys, PAGE_SIZE); |
394 | pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off; | |
ba242d5b | 395 | virt = acpi_map(pg_off, pg_sz); |
620242ae | 396 | if (!virt) { |
7ffd0443 | 397 | mutex_unlock(&acpi_ioremap_lock); |
620242ae MS |
398 | kfree(map); |
399 | return NULL; | |
400 | } | |
401 | ||
402 | INIT_LIST_HEAD(&map->list); | |
403 | map->virt = virt; | |
4a3cba5e MS |
404 | map->phys = pg_off; |
405 | map->size = pg_sz; | |
b7c1fadd | 406 | map->refcount = 1; |
620242ae | 407 | |
78cdb3ed | 408 | list_add_tail_rcu(&map->list, &acpi_ioremaps); |
620242ae | 409 | |
a238317c | 410 | out: |
7ffd0443 | 411 | mutex_unlock(&acpi_ioremap_lock); |
4a3cba5e | 412 | return map->virt + (phys - map->phys); |
1da177e4 | 413 | } |
a238317c LZ |
414 | EXPORT_SYMBOL_GPL(acpi_os_map_iomem); |
415 | ||
416 | void *__init_refok | |
417 | acpi_os_map_memory(acpi_physical_address phys, acpi_size size) | |
418 | { | |
419 | return (void *)acpi_os_map_iomem(phys, size); | |
420 | } | |
55a82ab3 | 421 | EXPORT_SYMBOL_GPL(acpi_os_map_memory); |
1da177e4 | 422 | |
b7c1fadd | 423 | static void acpi_os_drop_map_ref(struct acpi_ioremap *map) |
4a3cba5e | 424 | { |
b7c1fadd RW |
425 | if (!--map->refcount) |
426 | list_del_rcu(&map->list); | |
4a3cba5e | 427 | } |
4a3cba5e | 428 | |
b7c1fadd | 429 | static void acpi_os_map_cleanup(struct acpi_ioremap *map) |
7fe135dc | 430 | { |
b7c1fadd | 431 | if (!map->refcount) { |
74b51ee1 | 432 | synchronize_rcu_expedited(); |
ba242d5b | 433 | acpi_unmap(map->phys, map->virt); |
b7c1fadd RW |
434 | kfree(map); |
435 | } | |
4a3cba5e MS |
436 | } |
437 | ||
a238317c | 438 | void __ref acpi_os_unmap_iomem(void __iomem *virt, acpi_size size) |
1da177e4 | 439 | { |
620242ae | 440 | struct acpi_ioremap *map; |
620242ae MS |
441 | |
442 | if (!acpi_gbl_permanent_mmap) { | |
7d97277b | 443 | __acpi_unmap_table(virt, size); |
620242ae MS |
444 | return; |
445 | } | |
446 | ||
7bbb8903 | 447 | mutex_lock(&acpi_ioremap_lock); |
620242ae MS |
448 | map = acpi_map_lookup_virt(virt, size); |
449 | if (!map) { | |
7bbb8903 | 450 | mutex_unlock(&acpi_ioremap_lock); |
7fe135dc | 451 | WARN(true, PREFIX "%s: bad address %p\n", __func__, virt); |
620242ae MS |
452 | return; |
453 | } | |
b7c1fadd | 454 | acpi_os_drop_map_ref(map); |
7bbb8903 | 455 | mutex_unlock(&acpi_ioremap_lock); |
620242ae | 456 | |
b7c1fadd | 457 | acpi_os_map_cleanup(map); |
1da177e4 | 458 | } |
a238317c LZ |
459 | EXPORT_SYMBOL_GPL(acpi_os_unmap_iomem); |
460 | ||
461 | void __ref acpi_os_unmap_memory(void *virt, acpi_size size) | |
462 | { | |
463 | return acpi_os_unmap_iomem((void __iomem *)virt, size); | |
464 | } | |
55a82ab3 | 465 | EXPORT_SYMBOL_GPL(acpi_os_unmap_memory); |
1da177e4 | 466 | |
0d3a9cf5 | 467 | void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size) |
7d97277b YL |
468 | { |
469 | if (!acpi_gbl_permanent_mmap) | |
470 | __acpi_unmap_table(virt, size); | |
471 | } | |
472 | ||
6f68c91c | 473 | int acpi_os_map_generic_address(struct acpi_generic_address *gas) |
29718521 | 474 | { |
bc9ffce2 | 475 | u64 addr; |
29718521 MS |
476 | void __iomem *virt; |
477 | ||
bc9ffce2 | 478 | if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) |
29718521 MS |
479 | return 0; |
480 | ||
bc9ffce2 MS |
481 | /* Handle possible alignment issues */ |
482 | memcpy(&addr, &gas->address, sizeof(addr)); | |
483 | if (!addr || !gas->bit_width) | |
29718521 MS |
484 | return -EINVAL; |
485 | ||
a238317c | 486 | virt = acpi_os_map_iomem(addr, gas->bit_width / 8); |
29718521 MS |
487 | if (!virt) |
488 | return -EIO; | |
489 | ||
490 | return 0; | |
491 | } | |
6f68c91c | 492 | EXPORT_SYMBOL(acpi_os_map_generic_address); |
29718521 | 493 | |
6f68c91c | 494 | void acpi_os_unmap_generic_address(struct acpi_generic_address *gas) |
29718521 | 495 | { |
bc9ffce2 | 496 | u64 addr; |
7fe135dc | 497 | struct acpi_ioremap *map; |
29718521 | 498 | |
bc9ffce2 | 499 | if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) |
29718521 MS |
500 | return; |
501 | ||
bc9ffce2 MS |
502 | /* Handle possible alignment issues */ |
503 | memcpy(&addr, &gas->address, sizeof(addr)); | |
504 | if (!addr || !gas->bit_width) | |
29718521 MS |
505 | return; |
506 | ||
7bbb8903 | 507 | mutex_lock(&acpi_ioremap_lock); |
bc9ffce2 | 508 | map = acpi_map_lookup(addr, gas->bit_width / 8); |
7fe135dc RW |
509 | if (!map) { |
510 | mutex_unlock(&acpi_ioremap_lock); | |
511 | return; | |
512 | } | |
b7c1fadd | 513 | acpi_os_drop_map_ref(map); |
7bbb8903 | 514 | mutex_unlock(&acpi_ioremap_lock); |
29718521 | 515 | |
b7c1fadd | 516 | acpi_os_map_cleanup(map); |
29718521 | 517 | } |
6f68c91c | 518 | EXPORT_SYMBOL(acpi_os_unmap_generic_address); |
29718521 | 519 | |
1da177e4 LT |
520 | #ifdef ACPI_FUTURE_USAGE |
521 | acpi_status | |
4be44fcd | 522 | acpi_os_get_physical_address(void *virt, acpi_physical_address * phys) |
1da177e4 | 523 | { |
4be44fcd | 524 | if (!phys || !virt) |
1da177e4 LT |
525 | return AE_BAD_PARAMETER; |
526 | ||
527 | *phys = virt_to_phys(virt); | |
528 | ||
529 | return AE_OK; | |
530 | } | |
531 | #endif | |
532 | ||
18d78b64 RW |
533 | #ifdef CONFIG_ACPI_REV_OVERRIDE_POSSIBLE |
534 | static bool acpi_rev_override; | |
535 | ||
536 | int __init acpi_rev_override_setup(char *str) | |
537 | { | |
538 | acpi_rev_override = true; | |
539 | return 1; | |
540 | } | |
541 | __setup("acpi_rev_override", acpi_rev_override_setup); | |
542 | #else | |
543 | #define acpi_rev_override false | |
544 | #endif | |
545 | ||
1da177e4 LT |
546 | #define ACPI_MAX_OVERRIDE_LEN 100 |
547 | ||
548 | static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN]; | |
549 | ||
550 | acpi_status | |
4be44fcd | 551 | acpi_os_predefined_override(const struct acpi_predefined_names *init_val, |
2bad7e27 | 552 | char **new_val) |
1da177e4 LT |
553 | { |
554 | if (!init_val || !new_val) | |
555 | return AE_BAD_PARAMETER; | |
556 | ||
557 | *new_val = NULL; | |
4be44fcd | 558 | if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) { |
1da177e4 | 559 | printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n", |
4be44fcd | 560 | acpi_os_name); |
1da177e4 LT |
561 | *new_val = acpi_os_name; |
562 | } | |
563 | ||
18d78b64 RW |
564 | if (!memcmp(init_val->name, "_REV", 4) && acpi_rev_override) { |
565 | printk(KERN_INFO PREFIX "Overriding _REV return value to 5\n"); | |
566 | *new_val = (char *)5; | |
567 | } | |
568 | ||
1da177e4 LT |
569 | return AE_OK; |
570 | } | |
571 | ||
53aac44c TR |
572 | #ifdef CONFIG_ACPI_INITRD_TABLE_OVERRIDE |
573 | #include <linux/earlycpio.h> | |
574 | #include <linux/memblock.h> | |
575 | ||
576 | static u64 acpi_tables_addr; | |
577 | static int all_tables_size; | |
578 | ||
579 | /* Copied from acpica/tbutils.c:acpi_tb_checksum() */ | |
66e162b3 | 580 | static u8 __init acpi_table_checksum(u8 *buffer, u32 length) |
53aac44c TR |
581 | { |
582 | u8 sum = 0; | |
583 | u8 *end = buffer + length; | |
584 | ||
585 | while (buffer < end) | |
586 | sum = (u8) (sum + *(buffer++)); | |
587 | return sum; | |
588 | } | |
589 | ||
590 | /* All but ACPI_SIG_RSDP and ACPI_SIG_FACS: */ | |
591 | static const char * const table_sigs[] = { | |
592 | ACPI_SIG_BERT, ACPI_SIG_CPEP, ACPI_SIG_ECDT, ACPI_SIG_EINJ, | |
593 | ACPI_SIG_ERST, ACPI_SIG_HEST, ACPI_SIG_MADT, ACPI_SIG_MSCT, | |
594 | ACPI_SIG_SBST, ACPI_SIG_SLIT, ACPI_SIG_SRAT, ACPI_SIG_ASF, | |
595 | ACPI_SIG_BOOT, ACPI_SIG_DBGP, ACPI_SIG_DMAR, ACPI_SIG_HPET, | |
596 | ACPI_SIG_IBFT, ACPI_SIG_IVRS, ACPI_SIG_MCFG, ACPI_SIG_MCHI, | |
597 | ACPI_SIG_SLIC, ACPI_SIG_SPCR, ACPI_SIG_SPMI, ACPI_SIG_TCPA, | |
598 | ACPI_SIG_UEFI, ACPI_SIG_WAET, ACPI_SIG_WDAT, ACPI_SIG_WDDT, | |
599 | ACPI_SIG_WDRT, ACPI_SIG_DSDT, ACPI_SIG_FADT, ACPI_SIG_PSDT, | |
600 | ACPI_SIG_RSDT, ACPI_SIG_XSDT, ACPI_SIG_SSDT, NULL }; | |
601 | ||
53aac44c TR |
602 | #define ACPI_HEADER_SIZE sizeof(struct acpi_table_header) |
603 | ||
bee7f9c8 YL |
604 | #define ACPI_OVERRIDE_TABLES 64 |
605 | static struct cpio_data __initdata acpi_initrd_files[ACPI_OVERRIDE_TABLES]; | |
606 | ||
607 | #define MAP_CHUNK_SIZE (NR_FIX_BTMAPS << PAGE_SHIFT) | |
53aac44c TR |
608 | |
609 | void __init acpi_initrd_override(void *data, size_t size) | |
610 | { | |
611 | int sig, no, table_nr = 0, total_offset = 0; | |
612 | long offset = 0; | |
613 | struct acpi_table_header *table; | |
614 | char cpio_path[32] = "kernel/firmware/acpi/"; | |
615 | struct cpio_data file; | |
53aac44c TR |
616 | |
617 | if (data == NULL || size == 0) | |
618 | return; | |
619 | ||
620 | for (no = 0; no < ACPI_OVERRIDE_TABLES; no++) { | |
621 | file = find_cpio_data(cpio_path, data, size, &offset); | |
622 | if (!file.data) | |
623 | break; | |
624 | ||
625 | data += offset; | |
626 | size -= offset; | |
627 | ||
7702ae0d TC |
628 | if (file.size < sizeof(struct acpi_table_header)) { |
629 | pr_err("ACPI OVERRIDE: Table smaller than ACPI header [%s%s]\n", | |
630 | cpio_path, file.name); | |
631 | continue; | |
632 | } | |
53aac44c TR |
633 | |
634 | table = file.data; | |
635 | ||
636 | for (sig = 0; table_sigs[sig]; sig++) | |
637 | if (!memcmp(table->signature, table_sigs[sig], 4)) | |
638 | break; | |
639 | ||
7702ae0d TC |
640 | if (!table_sigs[sig]) { |
641 | pr_err("ACPI OVERRIDE: Unknown signature [%s%s]\n", | |
642 | cpio_path, file.name); | |
643 | continue; | |
644 | } | |
645 | if (file.size != table->length) { | |
646 | pr_err("ACPI OVERRIDE: File length does not match table length [%s%s]\n", | |
647 | cpio_path, file.name); | |
648 | continue; | |
649 | } | |
650 | if (acpi_table_checksum(file.data, table->length)) { | |
651 | pr_err("ACPI OVERRIDE: Bad table checksum [%s%s]\n", | |
652 | cpio_path, file.name); | |
653 | continue; | |
654 | } | |
53aac44c TR |
655 | |
656 | pr_info("%4.4s ACPI table found in initrd [%s%s][0x%x]\n", | |
657 | table->signature, cpio_path, file.name, table->length); | |
658 | ||
659 | all_tables_size += table->length; | |
bee7f9c8 YL |
660 | acpi_initrd_files[table_nr].data = file.data; |
661 | acpi_initrd_files[table_nr].size = file.size; | |
53aac44c TR |
662 | table_nr++; |
663 | } | |
664 | if (table_nr == 0) | |
665 | return; | |
666 | ||
667 | acpi_tables_addr = | |
668 | memblock_find_in_range(0, max_low_pfn_mapped << PAGE_SHIFT, | |
669 | all_tables_size, PAGE_SIZE); | |
670 | if (!acpi_tables_addr) { | |
671 | WARN_ON(1); | |
672 | return; | |
673 | } | |
674 | /* | |
675 | * Only calling e820_add_reserve does not work and the | |
676 | * tables are invalid (memory got used) later. | |
677 | * memblock_reserve works as expected and the tables won't get modified. | |
678 | * But it's not enough on X86 because ioremap will | |
679 | * complain later (used by acpi_os_map_memory) that the pages | |
680 | * that should get mapped are not marked "reserved". | |
681 | * Both memblock_reserve and e820_add_region (via arch_reserve_mem_area) | |
682 | * works fine. | |
683 | */ | |
a6432ded | 684 | memblock_reserve(acpi_tables_addr, all_tables_size); |
53aac44c TR |
685 | arch_reserve_mem_area(acpi_tables_addr, all_tables_size); |
686 | ||
bee7f9c8 YL |
687 | /* |
688 | * early_ioremap only can remap 256k one time. If we map all | |
689 | * tables one time, we will hit the limit. Need to map chunks | |
690 | * one by one during copying the same as that in relocate_initrd(). | |
691 | */ | |
53aac44c | 692 | for (no = 0; no < table_nr; no++) { |
bee7f9c8 YL |
693 | unsigned char *src_p = acpi_initrd_files[no].data; |
694 | phys_addr_t size = acpi_initrd_files[no].size; | |
695 | phys_addr_t dest_addr = acpi_tables_addr + total_offset; | |
696 | phys_addr_t slop, clen; | |
697 | char *dest_p; | |
698 | ||
699 | total_offset += size; | |
700 | ||
701 | while (size) { | |
702 | slop = dest_addr & ~PAGE_MASK; | |
703 | clen = size; | |
704 | if (clen > MAP_CHUNK_SIZE - slop) | |
705 | clen = MAP_CHUNK_SIZE - slop; | |
706 | dest_p = early_ioremap(dest_addr & PAGE_MASK, | |
707 | clen + slop); | |
708 | memcpy(dest_p + slop, src_p, clen); | |
709 | early_iounmap(dest_p, clen + slop); | |
710 | src_p += clen; | |
711 | dest_addr += clen; | |
712 | size -= clen; | |
713 | } | |
53aac44c | 714 | } |
53aac44c TR |
715 | } |
716 | #endif /* CONFIG_ACPI_INITRD_TABLE_OVERRIDE */ | |
717 | ||
325a8d36 TR |
718 | static void acpi_table_taint(struct acpi_table_header *table) |
719 | { | |
720 | pr_warn(PREFIX | |
721 | "Override [%4.4s-%8.8s], this is unsafe: tainting kernel\n", | |
722 | table->signature, table->oem_table_id); | |
373d4d09 | 723 | add_taint(TAINT_OVERRIDDEN_ACPI_TABLE, LOCKDEP_NOW_UNRELIABLE); |
325a8d36 TR |
724 | } |
725 | ||
726 | ||
1da177e4 | 727 | acpi_status |
4be44fcd LB |
728 | acpi_os_table_override(struct acpi_table_header * existing_table, |
729 | struct acpi_table_header ** new_table) | |
1da177e4 LT |
730 | { |
731 | if (!existing_table || !new_table) | |
732 | return AE_BAD_PARAMETER; | |
733 | ||
71fc47a9 MG |
734 | *new_table = NULL; |
735 | ||
1da177e4 LT |
736 | #ifdef CONFIG_ACPI_CUSTOM_DSDT |
737 | if (strncmp(existing_table->signature, "DSDT", 4) == 0) | |
4be44fcd | 738 | *new_table = (struct acpi_table_header *)AmlCode; |
1da177e4 | 739 | #endif |
325a8d36 TR |
740 | if (*new_table != NULL) |
741 | acpi_table_taint(existing_table); | |
1da177e4 LT |
742 | return AE_OK; |
743 | } | |
744 | ||
f7b004a1 BM |
745 | acpi_status |
746 | acpi_os_physical_table_override(struct acpi_table_header *existing_table, | |
b2a35003 TR |
747 | acpi_physical_address *address, |
748 | u32 *table_length) | |
f7b004a1 | 749 | { |
b2a35003 TR |
750 | #ifndef CONFIG_ACPI_INITRD_TABLE_OVERRIDE |
751 | *table_length = 0; | |
752 | *address = 0; | |
753 | return AE_OK; | |
754 | #else | |
755 | int table_offset = 0; | |
756 | struct acpi_table_header *table; | |
757 | ||
758 | *table_length = 0; | |
759 | *address = 0; | |
760 | ||
761 | if (!acpi_tables_addr) | |
762 | return AE_OK; | |
763 | ||
764 | do { | |
765 | if (table_offset + ACPI_HEADER_SIZE > all_tables_size) { | |
766 | WARN_ON(1); | |
767 | return AE_OK; | |
768 | } | |
769 | ||
770 | table = acpi_os_map_memory(acpi_tables_addr + table_offset, | |
771 | ACPI_HEADER_SIZE); | |
f7b004a1 | 772 | |
b2a35003 TR |
773 | if (table_offset + table->length > all_tables_size) { |
774 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
775 | WARN_ON(1); | |
776 | return AE_OK; | |
777 | } | |
778 | ||
779 | table_offset += table->length; | |
780 | ||
781 | if (memcmp(existing_table->signature, table->signature, 4)) { | |
782 | acpi_os_unmap_memory(table, | |
783 | ACPI_HEADER_SIZE); | |
784 | continue; | |
785 | } | |
786 | ||
787 | /* Only override tables with matching oem id */ | |
788 | if (memcmp(table->oem_table_id, existing_table->oem_table_id, | |
789 | ACPI_OEM_TABLE_ID_SIZE)) { | |
790 | acpi_os_unmap_memory(table, | |
791 | ACPI_HEADER_SIZE); | |
792 | continue; | |
793 | } | |
794 | ||
795 | table_offset -= table->length; | |
796 | *table_length = table->length; | |
797 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
798 | *address = acpi_tables_addr + table_offset; | |
799 | break; | |
800 | } while (table_offset + ACPI_HEADER_SIZE < all_tables_size); | |
f7b004a1 | 801 | |
325a8d36 TR |
802 | if (*address != 0) |
803 | acpi_table_taint(existing_table); | |
b2a35003 TR |
804 | return AE_OK; |
805 | #endif | |
806 | } | |
f7b004a1 | 807 | |
7d12e780 | 808 | static irqreturn_t acpi_irq(int irq, void *dev_id) |
1da177e4 | 809 | { |
5229e87d LB |
810 | u32 handled; |
811 | ||
812 | handled = (*acpi_irq_handler) (acpi_irq_context); | |
813 | ||
814 | if (handled) { | |
815 | acpi_irq_handled++; | |
816 | return IRQ_HANDLED; | |
88bea188 LB |
817 | } else { |
818 | acpi_irq_not_handled++; | |
5229e87d | 819 | return IRQ_NONE; |
88bea188 | 820 | } |
1da177e4 LT |
821 | } |
822 | ||
823 | acpi_status | |
4be44fcd LB |
824 | acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler, |
825 | void *context) | |
1da177e4 LT |
826 | { |
827 | unsigned int irq; | |
828 | ||
5229e87d LB |
829 | acpi_irq_stats_init(); |
830 | ||
1da177e4 | 831 | /* |
23fe3630 RW |
832 | * ACPI interrupts different from the SCI in our copy of the FADT are |
833 | * not supported. | |
1da177e4 | 834 | */ |
23fe3630 RW |
835 | if (gsi != acpi_gbl_FADT.sci_interrupt) |
836 | return AE_BAD_PARAMETER; | |
837 | ||
838 | if (acpi_irq_handler) | |
839 | return AE_ALREADY_ACQUIRED; | |
840 | ||
1da177e4 LT |
841 | if (acpi_gsi_to_irq(gsi, &irq) < 0) { |
842 | printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n", | |
843 | gsi); | |
844 | return AE_OK; | |
845 | } | |
846 | ||
847 | acpi_irq_handler = handler; | |
848 | acpi_irq_context = context; | |
a8d46b9e | 849 | if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) { |
1da177e4 | 850 | printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq); |
23fe3630 | 851 | acpi_irq_handler = NULL; |
1da177e4 LT |
852 | return AE_NOT_ACQUIRED; |
853 | } | |
1da177e4 LT |
854 | |
855 | return AE_OK; | |
856 | } | |
857 | ||
4be44fcd | 858 | acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler) |
1da177e4 | 859 | { |
23fe3630 RW |
860 | if (irq != acpi_gbl_FADT.sci_interrupt) |
861 | return AE_BAD_PARAMETER; | |
862 | ||
863 | free_irq(irq, acpi_irq); | |
864 | acpi_irq_handler = NULL; | |
1da177e4 LT |
865 | |
866 | return AE_OK; | |
867 | } | |
868 | ||
869 | /* | |
870 | * Running in interpreter thread context, safe to sleep | |
871 | */ | |
872 | ||
439913ff | 873 | void acpi_os_sleep(u64 ms) |
1da177e4 | 874 | { |
30282299 | 875 | msleep(ms); |
1da177e4 | 876 | } |
4be44fcd | 877 | |
4be44fcd | 878 | void acpi_os_stall(u32 us) |
1da177e4 LT |
879 | { |
880 | while (us) { | |
881 | u32 delay = 1000; | |
882 | ||
883 | if (delay > us) | |
884 | delay = us; | |
885 | udelay(delay); | |
886 | touch_nmi_watchdog(); | |
887 | us -= delay; | |
888 | } | |
889 | } | |
4be44fcd | 890 | |
1da177e4 LT |
891 | /* |
892 | * Support ACPI 3.0 AML Timer operand | |
893 | * Returns 64-bit free-running, monotonically increasing timer | |
894 | * with 100ns granularity | |
895 | */ | |
4be44fcd | 896 | u64 acpi_os_get_timer(void) |
1da177e4 | 897 | { |
10619066 MW |
898 | u64 time_ns = ktime_to_ns(ktime_get()); |
899 | do_div(time_ns, 100); | |
900 | return time_ns; | |
1da177e4 LT |
901 | } |
902 | ||
4be44fcd | 903 | acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width) |
1da177e4 LT |
904 | { |
905 | u32 dummy; | |
906 | ||
907 | if (!value) | |
908 | value = &dummy; | |
909 | ||
49fbabf5 ZY |
910 | *value = 0; |
911 | if (width <= 8) { | |
4be44fcd | 912 | *(u8 *) value = inb(port); |
49fbabf5 | 913 | } else if (width <= 16) { |
4be44fcd | 914 | *(u16 *) value = inw(port); |
49fbabf5 | 915 | } else if (width <= 32) { |
4be44fcd | 916 | *(u32 *) value = inl(port); |
49fbabf5 | 917 | } else { |
1da177e4 LT |
918 | BUG(); |
919 | } | |
920 | ||
921 | return AE_OK; | |
922 | } | |
4be44fcd | 923 | |
1da177e4 LT |
924 | EXPORT_SYMBOL(acpi_os_read_port); |
925 | ||
4be44fcd | 926 | acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width) |
1da177e4 | 927 | { |
49fbabf5 | 928 | if (width <= 8) { |
1da177e4 | 929 | outb(value, port); |
49fbabf5 | 930 | } else if (width <= 16) { |
1da177e4 | 931 | outw(value, port); |
49fbabf5 | 932 | } else if (width <= 32) { |
1da177e4 | 933 | outl(value, port); |
49fbabf5 | 934 | } else { |
1da177e4 LT |
935 | BUG(); |
936 | } | |
937 | ||
938 | return AE_OK; | |
939 | } | |
4be44fcd | 940 | |
1da177e4 LT |
941 | EXPORT_SYMBOL(acpi_os_write_port); |
942 | ||
e615bf5b MS |
943 | #ifdef readq |
944 | static inline u64 read64(const volatile void __iomem *addr) | |
945 | { | |
946 | return readq(addr); | |
947 | } | |
948 | #else | |
949 | static inline u64 read64(const volatile void __iomem *addr) | |
950 | { | |
951 | u64 l, h; | |
952 | l = readl(addr); | |
953 | h = readl(addr+4); | |
954 | return l | (h << 32); | |
955 | } | |
956 | #endif | |
957 | ||
958 | acpi_status | |
653f4b53 | 959 | acpi_os_read_memory(acpi_physical_address phys_addr, u64 *value, u32 width) |
e615bf5b MS |
960 | { |
961 | void __iomem *virt_addr; | |
962 | unsigned int size = width / 8; | |
963 | bool unmap = false; | |
964 | u64 dummy; | |
965 | ||
966 | rcu_read_lock(); | |
967 | virt_addr = acpi_map_vaddr_lookup(phys_addr, size); | |
968 | if (!virt_addr) { | |
969 | rcu_read_unlock(); | |
970 | virt_addr = acpi_os_ioremap(phys_addr, size); | |
971 | if (!virt_addr) | |
972 | return AE_BAD_ADDRESS; | |
973 | unmap = true; | |
974 | } | |
975 | ||
976 | if (!value) | |
977 | value = &dummy; | |
978 | ||
979 | switch (width) { | |
980 | case 8: | |
981 | *(u8 *) value = readb(virt_addr); | |
982 | break; | |
983 | case 16: | |
984 | *(u16 *) value = readw(virt_addr); | |
985 | break; | |
986 | case 32: | |
987 | *(u32 *) value = readl(virt_addr); | |
988 | break; | |
989 | case 64: | |
990 | *(u64 *) value = read64(virt_addr); | |
991 | break; | |
992 | default: | |
993 | BUG(); | |
994 | } | |
995 | ||
996 | if (unmap) | |
997 | iounmap(virt_addr); | |
998 | else | |
999 | rcu_read_unlock(); | |
1000 | ||
1001 | return AE_OK; | |
1002 | } | |
1003 | ||
e615bf5b MS |
1004 | #ifdef writeq |
1005 | static inline void write64(u64 val, volatile void __iomem *addr) | |
1006 | { | |
1007 | writeq(val, addr); | |
1008 | } | |
1009 | #else | |
1010 | static inline void write64(u64 val, volatile void __iomem *addr) | |
1011 | { | |
1012 | writel(val, addr); | |
1013 | writel(val>>32, addr+4); | |
1014 | } | |
1015 | #endif | |
1016 | ||
1017 | acpi_status | |
653f4b53 | 1018 | acpi_os_write_memory(acpi_physical_address phys_addr, u64 value, u32 width) |
e615bf5b MS |
1019 | { |
1020 | void __iomem *virt_addr; | |
1021 | unsigned int size = width / 8; | |
1022 | bool unmap = false; | |
1023 | ||
1024 | rcu_read_lock(); | |
1025 | virt_addr = acpi_map_vaddr_lookup(phys_addr, size); | |
1026 | if (!virt_addr) { | |
1027 | rcu_read_unlock(); | |
1028 | virt_addr = acpi_os_ioremap(phys_addr, size); | |
1029 | if (!virt_addr) | |
1030 | return AE_BAD_ADDRESS; | |
1031 | unmap = true; | |
1032 | } | |
1033 | ||
1034 | switch (width) { | |
1035 | case 8: | |
1036 | writeb(value, virt_addr); | |
1037 | break; | |
1038 | case 16: | |
1039 | writew(value, virt_addr); | |
1040 | break; | |
1041 | case 32: | |
1042 | writel(value, virt_addr); | |
1043 | break; | |
1044 | case 64: | |
1045 | write64(value, virt_addr); | |
1046 | break; | |
1047 | default: | |
1048 | BUG(); | |
1049 | } | |
1050 | ||
1051 | if (unmap) | |
1052 | iounmap(virt_addr); | |
1053 | else | |
1054 | rcu_read_unlock(); | |
1055 | ||
1056 | return AE_OK; | |
1057 | } | |
1058 | ||
1da177e4 | 1059 | acpi_status |
4be44fcd | 1060 | acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
c5f0231e | 1061 | u64 *value, u32 width) |
1da177e4 LT |
1062 | { |
1063 | int result, size; | |
c5f0231e | 1064 | u32 value32; |
1da177e4 LT |
1065 | |
1066 | if (!value) | |
1067 | return AE_BAD_PARAMETER; | |
1068 | ||
1069 | switch (width) { | |
1070 | case 8: | |
1071 | size = 1; | |
1072 | break; | |
1073 | case 16: | |
1074 | size = 2; | |
1075 | break; | |
1076 | case 32: | |
1077 | size = 4; | |
1078 | break; | |
1079 | default: | |
1080 | return AE_ERROR; | |
1081 | } | |
1082 | ||
b6ce068a MW |
1083 | result = raw_pci_read(pci_id->segment, pci_id->bus, |
1084 | PCI_DEVFN(pci_id->device, pci_id->function), | |
c5f0231e BM |
1085 | reg, size, &value32); |
1086 | *value = value32; | |
1da177e4 LT |
1087 | |
1088 | return (result ? AE_ERROR : AE_OK); | |
1089 | } | |
4be44fcd | 1090 | |
1da177e4 | 1091 | acpi_status |
4be44fcd | 1092 | acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
439913ff | 1093 | u64 value, u32 width) |
1da177e4 LT |
1094 | { |
1095 | int result, size; | |
1096 | ||
1097 | switch (width) { | |
1098 | case 8: | |
1099 | size = 1; | |
1100 | break; | |
1101 | case 16: | |
1102 | size = 2; | |
1103 | break; | |
1104 | case 32: | |
1105 | size = 4; | |
1106 | break; | |
1107 | default: | |
1108 | return AE_ERROR; | |
1109 | } | |
1110 | ||
b6ce068a MW |
1111 | result = raw_pci_write(pci_id->segment, pci_id->bus, |
1112 | PCI_DEVFN(pci_id->device, pci_id->function), | |
1113 | reg, size, value); | |
1da177e4 LT |
1114 | |
1115 | return (result ? AE_ERROR : AE_OK); | |
1116 | } | |
1117 | ||
65f27f38 | 1118 | static void acpi_os_execute_deferred(struct work_struct *work) |
88db5e14 AS |
1119 | { |
1120 | struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work); | |
88db5e14 | 1121 | |
19cd847a ZR |
1122 | dpc->function(dpc->context); |
1123 | kfree(dpc); | |
19cd847a ZR |
1124 | } |
1125 | ||
b8d35192 AS |
1126 | /******************************************************************************* |
1127 | * | |
1128 | * FUNCTION: acpi_os_execute | |
1129 | * | |
1130 | * PARAMETERS: Type - Type of the callback | |
1131 | * Function - Function to be executed | |
1132 | * Context - Function parameters | |
1133 | * | |
1134 | * RETURN: Status | |
1135 | * | |
1136 | * DESCRIPTION: Depending on type, either queues function for deferred execution or | |
1137 | * immediately executes function on a separate thread. | |
1138 | * | |
1139 | ******************************************************************************/ | |
1140 | ||
7b98118a RW |
1141 | acpi_status acpi_os_execute(acpi_execute_type type, |
1142 | acpi_osd_exec_callback function, void *context) | |
1da177e4 | 1143 | { |
4be44fcd LB |
1144 | acpi_status status = AE_OK; |
1145 | struct acpi_os_dpc *dpc; | |
17bc54ee | 1146 | struct workqueue_struct *queue; |
19cd847a | 1147 | int ret; |
72945b2b LB |
1148 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
1149 | "Scheduling function [%p(%p)] for deferred execution.\n", | |
1150 | function, context)); | |
1da177e4 | 1151 | |
1da177e4 LT |
1152 | /* |
1153 | * Allocate/initialize DPC structure. Note that this memory will be | |
65f27f38 | 1154 | * freed by the callee. The kernel handles the work_struct list in a |
1da177e4 LT |
1155 | * way that allows us to also free its memory inside the callee. |
1156 | * Because we may want to schedule several tasks with different | |
1157 | * parameters we can't use the approach some kernel code uses of | |
65f27f38 | 1158 | * having a static work_struct. |
1da177e4 | 1159 | */ |
72945b2b | 1160 | |
3ae45a27 | 1161 | dpc = kzalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC); |
1da177e4 | 1162 | if (!dpc) |
889c78be | 1163 | return AE_NO_MEMORY; |
b976fe19 | 1164 | |
1da177e4 LT |
1165 | dpc->function = function; |
1166 | dpc->context = context; | |
b976fe19 | 1167 | |
c02256be | 1168 | /* |
3ae45a27 RW |
1169 | * To prevent lockdep from complaining unnecessarily, make sure that |
1170 | * there is a different static lockdep key for each workqueue by using | |
1171 | * INIT_WORK() for each of them separately. | |
c02256be | 1172 | */ |
7b98118a | 1173 | if (type == OSL_NOTIFY_HANDLER) { |
3ae45a27 | 1174 | queue = kacpi_notify_wq; |
bc73675b | 1175 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); |
3ae45a27 RW |
1176 | } else { |
1177 | queue = kacpid_wq; | |
bc73675b | 1178 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); |
3ae45a27 | 1179 | } |
bc73675b | 1180 | |
8fec62b2 TH |
1181 | /* |
1182 | * On some machines, a software-initiated SMI causes corruption unless | |
1183 | * the SMI runs on CPU 0. An SMI can be initiated by any AML, but | |
1184 | * typically it's done in GPE-related methods that are run via | |
1185 | * workqueues, so we can avoid the known corruption cases by always | |
1186 | * queueing on CPU 0. | |
1187 | */ | |
1188 | ret = queue_work_on(0, queue, &dpc->work); | |
19cd847a ZR |
1189 | |
1190 | if (!ret) { | |
55ac9a01 LM |
1191 | printk(KERN_ERR PREFIX |
1192 | "Call to queue_work() failed.\n"); | |
17bc54ee AS |
1193 | status = AE_ERROR; |
1194 | kfree(dpc); | |
1da177e4 | 1195 | } |
889c78be | 1196 | return status; |
1da177e4 | 1197 | } |
7b98118a | 1198 | EXPORT_SYMBOL(acpi_os_execute); |
4be44fcd | 1199 | |
7b98118a | 1200 | void acpi_os_wait_events_complete(void) |
19cd847a | 1201 | { |
90253a79 LZ |
1202 | /* |
1203 | * Make sure the GPE handler or the fixed event handler is not used | |
1204 | * on another CPU after removal. | |
1205 | */ | |
1206 | if (acpi_irq_handler) | |
1207 | synchronize_hardirq(acpi_gbl_FADT.sci_interrupt); | |
7b98118a RW |
1208 | flush_workqueue(kacpid_wq); |
1209 | flush_workqueue(kacpi_notify_wq); | |
19cd847a | 1210 | } |
1da177e4 | 1211 | |
7b98118a RW |
1212 | struct acpi_hp_work { |
1213 | struct work_struct work; | |
1e3bcb59 | 1214 | struct acpi_device *adev; |
7b98118a RW |
1215 | u32 src; |
1216 | }; | |
1217 | ||
1218 | static void acpi_hotplug_work_fn(struct work_struct *work) | |
19cd847a | 1219 | { |
7b98118a RW |
1220 | struct acpi_hp_work *hpw = container_of(work, struct acpi_hp_work, work); |
1221 | ||
1222 | acpi_os_wait_events_complete(); | |
1e3bcb59 | 1223 | acpi_device_hotplug(hpw->adev, hpw->src); |
7b98118a | 1224 | kfree(hpw); |
19cd847a ZR |
1225 | } |
1226 | ||
1e3bcb59 | 1227 | acpi_status acpi_hotplug_schedule(struct acpi_device *adev, u32 src) |
1da177e4 | 1228 | { |
7b98118a RW |
1229 | struct acpi_hp_work *hpw; |
1230 | ||
1231 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, | |
1e3bcb59 RW |
1232 | "Scheduling hotplug event (%p, %u) for deferred execution.\n", |
1233 | adev, src)); | |
7b98118a RW |
1234 | |
1235 | hpw = kmalloc(sizeof(*hpw), GFP_KERNEL); | |
1236 | if (!hpw) | |
1237 | return AE_NO_MEMORY; | |
1238 | ||
1239 | INIT_WORK(&hpw->work, acpi_hotplug_work_fn); | |
1e3bcb59 | 1240 | hpw->adev = adev; |
7b98118a RW |
1241 | hpw->src = src; |
1242 | /* | |
1243 | * We can't run hotplug code in kacpid_wq/kacpid_notify_wq etc., because | |
1244 | * the hotplug code may call driver .remove() functions, which may | |
1245 | * invoke flush_scheduled_work()/acpi_os_wait_events_complete() to flush | |
1246 | * these workqueues. | |
1247 | */ | |
1248 | if (!queue_work(kacpi_hotplug_wq, &hpw->work)) { | |
1249 | kfree(hpw); | |
1250 | return AE_ERROR; | |
1251 | } | |
1252 | return AE_OK; | |
1da177e4 | 1253 | } |
4be44fcd | 1254 | |
d783156e RW |
1255 | bool acpi_queue_hotplug_work(struct work_struct *work) |
1256 | { | |
1257 | return queue_work(kacpi_hotplug_wq, work); | |
1258 | } | |
1da177e4 | 1259 | |
1da177e4 | 1260 | acpi_status |
4be44fcd | 1261 | acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle) |
1da177e4 | 1262 | { |
4be44fcd | 1263 | struct semaphore *sem = NULL; |
1da177e4 | 1264 | |
2d0acb4a | 1265 | sem = acpi_os_allocate_zeroed(sizeof(struct semaphore)); |
1da177e4 | 1266 | if (!sem) |
d550d98d | 1267 | return AE_NO_MEMORY; |
1da177e4 LT |
1268 | |
1269 | sema_init(sem, initial_units); | |
1270 | ||
4be44fcd | 1271 | *handle = (acpi_handle *) sem; |
1da177e4 | 1272 | |
4be44fcd LB |
1273 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n", |
1274 | *handle, initial_units)); | |
1da177e4 | 1275 | |
d550d98d | 1276 | return AE_OK; |
1da177e4 | 1277 | } |
1da177e4 | 1278 | |
1da177e4 LT |
1279 | /* |
1280 | * TODO: A better way to delete semaphores? Linux doesn't have a | |
1281 | * 'delete_semaphore()' function -- may result in an invalid | |
1282 | * pointer dereference for non-synchronized consumers. Should | |
1283 | * we at least check for blocked threads and signal/cancel them? | |
1284 | */ | |
1285 | ||
4be44fcd | 1286 | acpi_status acpi_os_delete_semaphore(acpi_handle handle) |
1da177e4 | 1287 | { |
4be44fcd | 1288 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 1289 | |
1da177e4 | 1290 | if (!sem) |
d550d98d | 1291 | return AE_BAD_PARAMETER; |
1da177e4 | 1292 | |
4be44fcd | 1293 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle)); |
1da177e4 | 1294 | |
f1241c87 | 1295 | BUG_ON(!list_empty(&sem->wait_list)); |
02438d87 | 1296 | kfree(sem); |
4be44fcd | 1297 | sem = NULL; |
1da177e4 | 1298 | |
d550d98d | 1299 | return AE_OK; |
1da177e4 | 1300 | } |
1da177e4 | 1301 | |
1da177e4 | 1302 | /* |
1da177e4 LT |
1303 | * TODO: Support for units > 1? |
1304 | */ | |
4be44fcd | 1305 | acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout) |
1da177e4 | 1306 | { |
4be44fcd LB |
1307 | acpi_status status = AE_OK; |
1308 | struct semaphore *sem = (struct semaphore *)handle; | |
f1241c87 | 1309 | long jiffies; |
4be44fcd | 1310 | int ret = 0; |
1da177e4 | 1311 | |
1da177e4 | 1312 | if (!sem || (units < 1)) |
d550d98d | 1313 | return AE_BAD_PARAMETER; |
1da177e4 LT |
1314 | |
1315 | if (units > 1) | |
d550d98d | 1316 | return AE_SUPPORT; |
1da177e4 | 1317 | |
4be44fcd LB |
1318 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n", |
1319 | handle, units, timeout)); | |
1da177e4 | 1320 | |
f1241c87 MW |
1321 | if (timeout == ACPI_WAIT_FOREVER) |
1322 | jiffies = MAX_SCHEDULE_TIMEOUT; | |
1323 | else | |
1324 | jiffies = msecs_to_jiffies(timeout); | |
cad1525a | 1325 | |
f1241c87 MW |
1326 | ret = down_timeout(sem, jiffies); |
1327 | if (ret) | |
1328 | status = AE_TIME; | |
1da177e4 LT |
1329 | |
1330 | if (ACPI_FAILURE(status)) { | |
9e7e2c04 | 1331 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, |
a6fc6720 | 1332 | "Failed to acquire semaphore[%p|%d|%d], %s", |
4be44fcd LB |
1333 | handle, units, timeout, |
1334 | acpi_format_exception(status))); | |
1335 | } else { | |
1336 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, | |
a6fc6720 | 1337 | "Acquired semaphore[%p|%d|%d]", handle, |
4be44fcd | 1338 | units, timeout)); |
1da177e4 LT |
1339 | } |
1340 | ||
d550d98d | 1341 | return status; |
1da177e4 | 1342 | } |
1da177e4 | 1343 | |
1da177e4 LT |
1344 | /* |
1345 | * TODO: Support for units > 1? | |
1346 | */ | |
4be44fcd | 1347 | acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units) |
1da177e4 | 1348 | { |
4be44fcd | 1349 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 1350 | |
1da177e4 | 1351 | if (!sem || (units < 1)) |
d550d98d | 1352 | return AE_BAD_PARAMETER; |
1da177e4 LT |
1353 | |
1354 | if (units > 1) | |
d550d98d | 1355 | return AE_SUPPORT; |
1da177e4 | 1356 | |
4be44fcd LB |
1357 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle, |
1358 | units)); | |
1da177e4 LT |
1359 | |
1360 | up(sem); | |
1361 | ||
d550d98d | 1362 | return AE_OK; |
1da177e4 | 1363 | } |
4be44fcd | 1364 | |
1da177e4 | 1365 | #ifdef ACPI_FUTURE_USAGE |
4be44fcd | 1366 | u32 acpi_os_get_line(char *buffer) |
1da177e4 LT |
1367 | { |
1368 | ||
1369 | #ifdef ENABLE_DEBUGGER | |
1370 | if (acpi_in_debugger) { | |
1371 | u32 chars; | |
1372 | ||
1373 | kdb_read(buffer, sizeof(line_buf)); | |
1374 | ||
1375 | /* remove the CR kdb includes */ | |
1376 | chars = strlen(buffer) - 1; | |
1377 | buffer[chars] = '\0'; | |
1378 | } | |
1379 | #endif | |
1380 | ||
1381 | return 0; | |
1382 | } | |
4be44fcd | 1383 | #endif /* ACPI_FUTURE_USAGE */ |
1da177e4 | 1384 | |
4be44fcd | 1385 | acpi_status acpi_os_signal(u32 function, void *info) |
1da177e4 | 1386 | { |
4be44fcd | 1387 | switch (function) { |
1da177e4 LT |
1388 | case ACPI_SIGNAL_FATAL: |
1389 | printk(KERN_ERR PREFIX "Fatal opcode executed\n"); | |
1390 | break; | |
1391 | case ACPI_SIGNAL_BREAKPOINT: | |
1392 | /* | |
1393 | * AML Breakpoint | |
1394 | * ACPI spec. says to treat it as a NOP unless | |
1395 | * you are debugging. So if/when we integrate | |
1396 | * AML debugger into the kernel debugger its | |
1397 | * hook will go here. But until then it is | |
1398 | * not useful to print anything on breakpoints. | |
1399 | */ | |
1400 | break; | |
1401 | default: | |
1402 | break; | |
1403 | } | |
1404 | ||
1405 | return AE_OK; | |
1406 | } | |
4be44fcd | 1407 | |
4be44fcd | 1408 | static int __init acpi_os_name_setup(char *str) |
1da177e4 LT |
1409 | { |
1410 | char *p = acpi_os_name; | |
4be44fcd | 1411 | int count = ACPI_MAX_OVERRIDE_LEN - 1; |
1da177e4 LT |
1412 | |
1413 | if (!str || !*str) | |
1414 | return 0; | |
1415 | ||
5e2be4e0 | 1416 | for (; count-- && *str; str++) { |
1da177e4 LT |
1417 | if (isalnum(*str) || *str == ' ' || *str == ':') |
1418 | *p++ = *str; | |
1419 | else if (*str == '\'' || *str == '"') | |
1420 | continue; | |
1421 | else | |
1422 | break; | |
1423 | } | |
1424 | *p = 0; | |
1425 | ||
1426 | return 1; | |
4be44fcd | 1427 | |
1da177e4 LT |
1428 | } |
1429 | ||
1430 | __setup("acpi_os_name=", acpi_os_name_setup); | |
1431 | ||
12d32064 LM |
1432 | #define OSI_STRING_LENGTH_MAX 64 /* arbitrary */ |
1433 | #define OSI_STRING_ENTRIES_MAX 16 /* arbitrary */ | |
1434 | ||
1435 | struct osi_setup_entry { | |
1436 | char string[OSI_STRING_LENGTH_MAX]; | |
1437 | bool enable; | |
1438 | }; | |
1439 | ||
e73d3136 HG |
1440 | static struct osi_setup_entry |
1441 | osi_setup_entries[OSI_STRING_ENTRIES_MAX] __initdata = { | |
aa165971 SL |
1442 | {"Module Device", true}, |
1443 | {"Processor Device", true}, | |
1444 | {"3.0 _SCP Extensions", true}, | |
1445 | {"Processor Aggregator Device", true}, | |
1446 | }; | |
12d32064 | 1447 | |
d90aa92c LM |
1448 | void __init acpi_osi_setup(char *str) |
1449 | { | |
12d32064 LM |
1450 | struct osi_setup_entry *osi; |
1451 | bool enable = true; | |
1452 | int i; | |
1453 | ||
d90aa92c LM |
1454 | if (!acpi_gbl_create_osi_method) |
1455 | return; | |
1456 | ||
1457 | if (str == NULL || *str == '\0') { | |
1458 | printk(KERN_INFO PREFIX "_OSI method disabled\n"); | |
1459 | acpi_gbl_create_osi_method = FALSE; | |
12d32064 LM |
1460 | return; |
1461 | } | |
1462 | ||
1463 | if (*str == '!') { | |
1464 | str++; | |
5dc17986 LZ |
1465 | if (*str == '\0') { |
1466 | osi_linux.default_disabling = 1; | |
1467 | return; | |
741d8128 LZ |
1468 | } else if (*str == '*') { |
1469 | acpi_update_interfaces(ACPI_DISABLE_ALL_STRINGS); | |
1470 | for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { | |
1471 | osi = &osi_setup_entries[i]; | |
1472 | osi->enable = false; | |
1473 | } | |
1474 | return; | |
5dc17986 | 1475 | } |
12d32064 LM |
1476 | enable = false; |
1477 | } | |
1478 | ||
1479 | for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { | |
1480 | osi = &osi_setup_entries[i]; | |
1481 | if (!strcmp(osi->string, str)) { | |
1482 | osi->enable = enable; | |
1483 | break; | |
1484 | } else if (osi->string[0] == '\0') { | |
1485 | osi->enable = enable; | |
1486 | strncpy(osi->string, str, OSI_STRING_LENGTH_MAX); | |
1487 | break; | |
1488 | } | |
1489 | } | |
d90aa92c LM |
1490 | } |
1491 | ||
d4b7dc49 LB |
1492 | static void __init set_osi_linux(unsigned int enable) |
1493 | { | |
d90aa92c | 1494 | if (osi_linux.enable != enable) |
d4b7dc49 | 1495 | osi_linux.enable = enable; |
b0ed7a91 LM |
1496 | |
1497 | if (osi_linux.enable) | |
1498 | acpi_osi_setup("Linux"); | |
1499 | else | |
1500 | acpi_osi_setup("!Linux"); | |
1501 | ||
d4b7dc49 LB |
1502 | return; |
1503 | } | |
1504 | ||
1505 | static void __init acpi_cmdline_osi_linux(unsigned int enable) | |
1506 | { | |
d90aa92c LM |
1507 | osi_linux.cmdline = 1; /* cmdline set the default and override DMI */ |
1508 | osi_linux.dmi = 0; | |
d4b7dc49 LB |
1509 | set_osi_linux(enable); |
1510 | ||
1511 | return; | |
1512 | } | |
1513 | ||
1514 | void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d) | |
1515 | { | |
d4b7dc49 LB |
1516 | printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident); |
1517 | ||
1518 | if (enable == -1) | |
1519 | return; | |
1520 | ||
d90aa92c | 1521 | osi_linux.dmi = 1; /* DMI knows that this box asks OSI(Linux) */ |
d4b7dc49 | 1522 | set_osi_linux(enable); |
f507654d | 1523 | |
f507654d LB |
1524 | return; |
1525 | } | |
1526 | ||
1da177e4 | 1527 | /* |
ae00d812 LB |
1528 | * Modify the list of "OS Interfaces" reported to BIOS via _OSI |
1529 | * | |
1da177e4 | 1530 | * empty string disables _OSI |
ae00d812 LB |
1531 | * string starting with '!' disables that string |
1532 | * otherwise string is added to list, augmenting built-in strings | |
1da177e4 | 1533 | */ |
b0ed7a91 | 1534 | static void __init acpi_osi_setup_late(void) |
1da177e4 | 1535 | { |
12d32064 LM |
1536 | struct osi_setup_entry *osi; |
1537 | char *str; | |
1538 | int i; | |
d90aa92c | 1539 | acpi_status status; |
b0ed7a91 | 1540 | |
5dc17986 LZ |
1541 | if (osi_linux.default_disabling) { |
1542 | status = acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS); | |
1543 | ||
1544 | if (ACPI_SUCCESS(status)) | |
1545 | printk(KERN_INFO PREFIX "Disabled all _OSI OS vendors\n"); | |
1546 | } | |
1547 | ||
12d32064 LM |
1548 | for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { |
1549 | osi = &osi_setup_entries[i]; | |
1550 | str = osi->string; | |
b0ed7a91 | 1551 | |
12d32064 LM |
1552 | if (*str == '\0') |
1553 | break; | |
1554 | if (osi->enable) { | |
1555 | status = acpi_install_interface(str); | |
d90aa92c | 1556 | |
12d32064 LM |
1557 | if (ACPI_SUCCESS(status)) |
1558 | printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str); | |
1559 | } else { | |
1560 | status = acpi_remove_interface(str); | |
d90aa92c | 1561 | |
12d32064 LM |
1562 | if (ACPI_SUCCESS(status)) |
1563 | printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str); | |
1564 | } | |
b0ed7a91 LM |
1565 | } |
1566 | } | |
1567 | ||
d90aa92c | 1568 | static int __init osi_setup(char *str) |
b0ed7a91 | 1569 | { |
d90aa92c LM |
1570 | if (str && !strcmp("Linux", str)) |
1571 | acpi_cmdline_osi_linux(1); | |
1572 | else if (str && !strcmp("!Linux", str)) | |
1573 | acpi_cmdline_osi_linux(0); | |
1574 | else | |
1575 | acpi_osi_setup(str); | |
1da177e4 LT |
1576 | |
1577 | return 1; | |
1578 | } | |
1579 | ||
d90aa92c | 1580 | __setup("acpi_osi=", osi_setup); |
1da177e4 | 1581 | |
22b5afce | 1582 | /* |
08e1d7c0 | 1583 | * Disable the auto-serialization of named objects creation methods. |
22b5afce | 1584 | * |
08e1d7c0 | 1585 | * This feature is enabled by default. It marks the AML control methods |
22b5afce BM |
1586 | * that contain the opcodes to create named objects as "Serialized". |
1587 | */ | |
08e1d7c0 | 1588 | static int __init acpi_no_auto_serialize_setup(char *str) |
1da177e4 | 1589 | { |
08e1d7c0 LZ |
1590 | acpi_gbl_auto_serialize_methods = FALSE; |
1591 | pr_info("ACPI: auto-serialization disabled\n"); | |
1da177e4 LT |
1592 | |
1593 | return 1; | |
1594 | } | |
1595 | ||
08e1d7c0 | 1596 | __setup("acpi_no_auto_serialize", acpi_no_auto_serialize_setup); |
1da177e4 | 1597 | |
df92e695 TR |
1598 | /* Check of resource interference between native drivers and ACPI |
1599 | * OperationRegions (SystemIO and System Memory only). | |
1600 | * IO ports and memory declared in ACPI might be used by the ACPI subsystem | |
1601 | * in arbitrary AML code and can interfere with legacy drivers. | |
1602 | * acpi_enforce_resources= can be set to: | |
1603 | * | |
7e90560c | 1604 | * - strict (default) (2) |
df92e695 | 1605 | * -> further driver trying to access the resources will not load |
7e90560c | 1606 | * - lax (1) |
df92e695 TR |
1607 | * -> further driver trying to access the resources will load, but you |
1608 | * get a system message that something might go wrong... | |
1609 | * | |
1610 | * - no (0) | |
1611 | * -> ACPI Operation Region resources will not be registered | |
1612 | * | |
1613 | */ | |
1614 | #define ENFORCE_RESOURCES_STRICT 2 | |
1615 | #define ENFORCE_RESOURCES_LAX 1 | |
1616 | #define ENFORCE_RESOURCES_NO 0 | |
1617 | ||
7e90560c | 1618 | static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; |
df92e695 TR |
1619 | |
1620 | static int __init acpi_enforce_resources_setup(char *str) | |
1621 | { | |
1622 | if (str == NULL || *str == '\0') | |
1623 | return 0; | |
1624 | ||
1625 | if (!strcmp("strict", str)) | |
1626 | acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; | |
1627 | else if (!strcmp("lax", str)) | |
1628 | acpi_enforce_resources = ENFORCE_RESOURCES_LAX; | |
1629 | else if (!strcmp("no", str)) | |
1630 | acpi_enforce_resources = ENFORCE_RESOURCES_NO; | |
1631 | ||
1632 | return 1; | |
1633 | } | |
1634 | ||
1635 | __setup("acpi_enforce_resources=", acpi_enforce_resources_setup); | |
1636 | ||
1637 | /* Check for resource conflicts between ACPI OperationRegions and native | |
1638 | * drivers */ | |
876fba43 | 1639 | int acpi_check_resource_conflict(const struct resource *res) |
df92e695 | 1640 | { |
f654c0fe LM |
1641 | acpi_adr_space_type space_id; |
1642 | acpi_size length; | |
1643 | u8 warn = 0; | |
1644 | int clash = 0; | |
df92e695 TR |
1645 | |
1646 | if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) | |
1647 | return 0; | |
1648 | if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM)) | |
1649 | return 0; | |
1650 | ||
f654c0fe LM |
1651 | if (res->flags & IORESOURCE_IO) |
1652 | space_id = ACPI_ADR_SPACE_SYSTEM_IO; | |
1653 | else | |
1654 | space_id = ACPI_ADR_SPACE_SYSTEM_MEMORY; | |
df92e695 | 1655 | |
e4f52244 | 1656 | length = resource_size(res); |
f654c0fe LM |
1657 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) |
1658 | warn = 1; | |
1659 | clash = acpi_check_address_range(space_id, res->start, length, warn); | |
df92e695 TR |
1660 | |
1661 | if (clash) { | |
1662 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) { | |
14f03343 JD |
1663 | if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX) |
1664 | printk(KERN_NOTICE "ACPI: This conflict may" | |
1665 | " cause random problems and system" | |
1666 | " instability\n"); | |
1667 | printk(KERN_INFO "ACPI: If an ACPI driver is available" | |
1668 | " for this device, you should use it instead of" | |
1669 | " the native driver\n"); | |
df92e695 TR |
1670 | } |
1671 | if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT) | |
1672 | return -EBUSY; | |
1673 | } | |
1674 | return 0; | |
1675 | } | |
443dea72 | 1676 | EXPORT_SYMBOL(acpi_check_resource_conflict); |
df92e695 TR |
1677 | |
1678 | int acpi_check_region(resource_size_t start, resource_size_t n, | |
1679 | const char *name) | |
1680 | { | |
1681 | struct resource res = { | |
1682 | .start = start, | |
1683 | .end = start + n - 1, | |
1684 | .name = name, | |
1685 | .flags = IORESOURCE_IO, | |
1686 | }; | |
1687 | ||
1688 | return acpi_check_resource_conflict(&res); | |
1689 | } | |
1690 | EXPORT_SYMBOL(acpi_check_region); | |
1691 | ||
70dd6bea JD |
1692 | /* |
1693 | * Let drivers know whether the resource checks are effective | |
1694 | */ | |
1695 | int acpi_resources_are_enforced(void) | |
1696 | { | |
1697 | return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT; | |
1698 | } | |
1699 | EXPORT_SYMBOL(acpi_resources_are_enforced); | |
1700 | ||
a87878ba HG |
1701 | bool acpi_osi_is_win8(void) |
1702 | { | |
1703 | return acpi_gbl_osi_data >= ACPI_OSI_WIN_8; | |
1704 | } | |
1705 | EXPORT_SYMBOL(acpi_osi_is_win8); | |
1706 | ||
9f63b88b LM |
1707 | /* |
1708 | * Deallocate the memory for a spinlock. | |
1709 | */ | |
1710 | void acpi_os_delete_lock(acpi_spinlock handle) | |
1711 | { | |
1712 | ACPI_FREE(handle); | |
1713 | } | |
1714 | ||
73459f73 RM |
1715 | /* |
1716 | * Acquire a spinlock. | |
1717 | * | |
1718 | * handle is a pointer to the spinlock_t. | |
73459f73 RM |
1719 | */ |
1720 | ||
967440e3 | 1721 | acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp) |
73459f73 | 1722 | { |
b8e4d893 | 1723 | acpi_cpu_flags flags; |
967440e3 | 1724 | spin_lock_irqsave(lockp, flags); |
73459f73 RM |
1725 | return flags; |
1726 | } | |
1727 | ||
1728 | /* | |
1729 | * Release a spinlock. See above. | |
1730 | */ | |
1731 | ||
967440e3 | 1732 | void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags) |
73459f73 | 1733 | { |
967440e3 | 1734 | spin_unlock_irqrestore(lockp, flags); |
73459f73 RM |
1735 | } |
1736 | ||
73459f73 RM |
1737 | #ifndef ACPI_USE_LOCAL_CACHE |
1738 | ||
1739 | /******************************************************************************* | |
1740 | * | |
1741 | * FUNCTION: acpi_os_create_cache | |
1742 | * | |
b229cf92 BM |
1743 | * PARAMETERS: name - Ascii name for the cache |
1744 | * size - Size of each cached object | |
1745 | * depth - Maximum depth of the cache (in objects) <ignored> | |
1746 | * cache - Where the new cache object is returned | |
73459f73 | 1747 | * |
b229cf92 | 1748 | * RETURN: status |
73459f73 RM |
1749 | * |
1750 | * DESCRIPTION: Create a cache object | |
1751 | * | |
1752 | ******************************************************************************/ | |
1753 | ||
1754 | acpi_status | |
4be44fcd | 1755 | acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache) |
73459f73 | 1756 | { |
20c2df83 | 1757 | *cache = kmem_cache_create(name, size, 0, 0, NULL); |
a6fdbf90 | 1758 | if (*cache == NULL) |
b229cf92 BM |
1759 | return AE_ERROR; |
1760 | else | |
1761 | return AE_OK; | |
73459f73 RM |
1762 | } |
1763 | ||
1764 | /******************************************************************************* | |
1765 | * | |
1766 | * FUNCTION: acpi_os_purge_cache | |
1767 | * | |
1768 | * PARAMETERS: Cache - Handle to cache object | |
1769 | * | |
1770 | * RETURN: Status | |
1771 | * | |
1772 | * DESCRIPTION: Free all objects within the requested cache. | |
1773 | * | |
1774 | ******************************************************************************/ | |
1775 | ||
4be44fcd | 1776 | acpi_status acpi_os_purge_cache(acpi_cache_t * cache) |
73459f73 | 1777 | { |
50dd0969 | 1778 | kmem_cache_shrink(cache); |
4be44fcd | 1779 | return (AE_OK); |
73459f73 RM |
1780 | } |
1781 | ||
1782 | /******************************************************************************* | |
1783 | * | |
1784 | * FUNCTION: acpi_os_delete_cache | |
1785 | * | |
1786 | * PARAMETERS: Cache - Handle to cache object | |
1787 | * | |
1788 | * RETURN: Status | |
1789 | * | |
1790 | * DESCRIPTION: Free all objects within the requested cache and delete the | |
1791 | * cache object. | |
1792 | * | |
1793 | ******************************************************************************/ | |
1794 | ||
4be44fcd | 1795 | acpi_status acpi_os_delete_cache(acpi_cache_t * cache) |
73459f73 | 1796 | { |
1a1d92c1 | 1797 | kmem_cache_destroy(cache); |
4be44fcd | 1798 | return (AE_OK); |
73459f73 RM |
1799 | } |
1800 | ||
1801 | /******************************************************************************* | |
1802 | * | |
1803 | * FUNCTION: acpi_os_release_object | |
1804 | * | |
1805 | * PARAMETERS: Cache - Handle to cache object | |
1806 | * Object - The object to be released | |
1807 | * | |
1808 | * RETURN: None | |
1809 | * | |
1810 | * DESCRIPTION: Release an object to the specified cache. If cache is full, | |
1811 | * the object is deleted. | |
1812 | * | |
1813 | ******************************************************************************/ | |
1814 | ||
4be44fcd | 1815 | acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object) |
73459f73 | 1816 | { |
4be44fcd LB |
1817 | kmem_cache_free(cache, object); |
1818 | return (AE_OK); | |
73459f73 | 1819 | } |
73459f73 | 1820 | #endif |
d362edaf | 1821 | |
a94e88cd | 1822 | static int __init acpi_no_static_ssdt_setup(char *s) |
b75dd297 | 1823 | { |
a94e88cd LZ |
1824 | acpi_gbl_disable_ssdt_table_install = TRUE; |
1825 | pr_info("ACPI: static SSDT installation disabled\n"); | |
b75dd297 | 1826 | |
a94e88cd | 1827 | return 0; |
b75dd297 LZ |
1828 | } |
1829 | ||
a94e88cd | 1830 | early_param("acpi_no_static_ssdt", acpi_no_static_ssdt_setup); |
b75dd297 | 1831 | |
4dde507f LZ |
1832 | static int __init acpi_disable_return_repair(char *s) |
1833 | { | |
1834 | printk(KERN_NOTICE PREFIX | |
1835 | "ACPI: Predefined validation mechanism disabled\n"); | |
1836 | acpi_gbl_disable_auto_repair = TRUE; | |
1837 | ||
1838 | return 1; | |
1839 | } | |
1840 | ||
1841 | __setup("acpica_no_return_repair", acpi_disable_return_repair); | |
1842 | ||
d362edaf MS |
1843 | acpi_status __init acpi_os_initialize(void) |
1844 | { | |
1845 | acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block); | |
1846 | acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block); | |
1847 | acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block); | |
1848 | acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block); | |
a4714a89 RW |
1849 | if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) { |
1850 | /* | |
1851 | * Use acpi_os_map_generic_address to pre-map the reset | |
1852 | * register if it's in system memory. | |
1853 | */ | |
1854 | int rv; | |
1855 | ||
1856 | rv = acpi_os_map_generic_address(&acpi_gbl_FADT.reset_register); | |
1857 | pr_debug(PREFIX "%s: map reset_reg status %d\n", __func__, rv); | |
1858 | } | |
d362edaf MS |
1859 | |
1860 | return AE_OK; | |
1861 | } | |
1862 | ||
32d47eef | 1863 | acpi_status __init acpi_os_initialize1(void) |
d362edaf | 1864 | { |
b9a5e5e1 | 1865 | acpi_reserve_resources(); |
44d2588e TH |
1866 | kacpid_wq = alloc_workqueue("kacpid", 0, 1); |
1867 | kacpi_notify_wq = alloc_workqueue("kacpi_notify", 0, 1); | |
d783156e | 1868 | kacpi_hotplug_wq = alloc_ordered_workqueue("kacpi_hotplug", 0); |
d362edaf MS |
1869 | BUG_ON(!kacpid_wq); |
1870 | BUG_ON(!kacpi_notify_wq); | |
1871 | BUG_ON(!kacpi_hotplug_wq); | |
1bd64d42 LB |
1872 | acpi_install_interface_handler(acpi_osi_handler); |
1873 | acpi_osi_setup_late(); | |
d362edaf MS |
1874 | return AE_OK; |
1875 | } | |
1876 | ||
1877 | acpi_status acpi_os_terminate(void) | |
1878 | { | |
1879 | if (acpi_irq_handler) { | |
23fe3630 | 1880 | acpi_os_remove_interrupt_handler(acpi_gbl_FADT.sci_interrupt, |
d362edaf MS |
1881 | acpi_irq_handler); |
1882 | } | |
1883 | ||
1884 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe1_block); | |
1885 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block); | |
1886 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block); | |
1887 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block); | |
a4714a89 RW |
1888 | if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) |
1889 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.reset_register); | |
d362edaf MS |
1890 | |
1891 | destroy_workqueue(kacpid_wq); | |
1892 | destroy_workqueue(kacpi_notify_wq); | |
1893 | destroy_workqueue(kacpi_hotplug_wq); | |
1894 | ||
1895 | return AE_OK; | |
1896 | } | |
09f98a82 TL |
1897 | |
1898 | acpi_status acpi_os_prepare_sleep(u8 sleep_state, u32 pm1a_control, | |
1899 | u32 pm1b_control) | |
1900 | { | |
1901 | int rc = 0; | |
1902 | if (__acpi_os_prepare_sleep) | |
1903 | rc = __acpi_os_prepare_sleep(sleep_state, | |
1904 | pm1a_control, pm1b_control); | |
1905 | if (rc < 0) | |
1906 | return AE_ERROR; | |
1907 | else if (rc > 0) | |
1908 | return AE_CTRL_SKIP; | |
1909 | ||
1910 | return AE_OK; | |
1911 | } | |
1912 | ||
1913 | void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state, | |
1914 | u32 pm1a_ctrl, u32 pm1b_ctrl)) | |
1915 | { | |
1916 | __acpi_os_prepare_sleep = func; | |
1917 | } | |
92d8aff3 | 1918 | |
d6b47b12 BG |
1919 | acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state, u32 val_a, |
1920 | u32 val_b) | |
1921 | { | |
1922 | int rc = 0; | |
1923 | if (__acpi_os_prepare_extended_sleep) | |
1924 | rc = __acpi_os_prepare_extended_sleep(sleep_state, | |
1925 | val_a, val_b); | |
1926 | if (rc < 0) | |
1927 | return AE_ERROR; | |
1928 | else if (rc > 0) | |
1929 | return AE_CTRL_SKIP; | |
1930 | ||
1931 | return AE_OK; | |
1932 | } | |
1933 | ||
1934 | void acpi_os_set_prepare_extended_sleep(int (*func)(u8 sleep_state, | |
1935 | u32 val_a, u32 val_b)) | |
1936 | { | |
1937 | __acpi_os_prepare_extended_sleep = func; | |
1938 | } |