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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> | |
34 | #include <linux/pci.h> | |
1da177e4 LT |
35 | #include <linux/interrupt.h> |
36 | #include <linux/kmod.h> | |
37 | #include <linux/delay.h> | |
38 | #include <linux/workqueue.h> | |
39 | #include <linux/nmi.h> | |
ad71860a | 40 | #include <linux/acpi.h> |
2d6d9fd3 | 41 | #include <linux/acpi_io.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 | ||
51 | #include <acpi/acpi.h> | |
52 | #include <acpi/acpi_bus.h> | |
53 | #include <acpi/processor.h> | |
1da177e4 | 54 | |
1da177e4 | 55 | #define _COMPONENT ACPI_OS_SERVICES |
f52fd66d | 56 | ACPI_MODULE_NAME("osl"); |
1da177e4 | 57 | #define PREFIX "ACPI: " |
4be44fcd LB |
58 | struct acpi_os_dpc { |
59 | acpi_osd_exec_callback function; | |
60 | void *context; | |
65f27f38 | 61 | struct work_struct work; |
9ac61856 | 62 | int wait; |
1da177e4 LT |
63 | }; |
64 | ||
65 | #ifdef CONFIG_ACPI_CUSTOM_DSDT | |
66 | #include CONFIG_ACPI_CUSTOM_DSDT_FILE | |
67 | #endif | |
68 | ||
69 | #ifdef ENABLE_DEBUGGER | |
70 | #include <linux/kdb.h> | |
71 | ||
72 | /* stuff for debugger support */ | |
73 | int acpi_in_debugger; | |
74 | EXPORT_SYMBOL(acpi_in_debugger); | |
75 | ||
76 | extern char line_buf[80]; | |
4be44fcd | 77 | #endif /*ENABLE_DEBUGGER */ |
1da177e4 | 78 | |
1da177e4 LT |
79 | static acpi_osd_handler acpi_irq_handler; |
80 | static void *acpi_irq_context; | |
81 | static struct workqueue_struct *kacpid_wq; | |
88db5e14 | 82 | static struct workqueue_struct *kacpi_notify_wq; |
6af8bef1 PB |
83 | struct workqueue_struct *kacpi_hotplug_wq; |
84 | EXPORT_SYMBOL(kacpi_hotplug_wq); | |
1da177e4 | 85 | |
620242ae MS |
86 | /* |
87 | * This list of permanent mappings is for memory that may be accessed from | |
88 | * interrupt context, where we can't do the ioremap(). | |
89 | */ | |
90 | struct acpi_ioremap { | |
91 | struct list_head list; | |
92 | void __iomem *virt; | |
93 | acpi_physical_address phys; | |
94 | acpi_size size; | |
b7c1fadd | 95 | unsigned long refcount; |
620242ae MS |
96 | }; |
97 | ||
98 | static LIST_HEAD(acpi_ioremaps); | |
7bbb8903 | 99 | static DEFINE_MUTEX(acpi_ioremap_lock); |
620242ae | 100 | |
b0ed7a91 | 101 | static void __init acpi_osi_setup_late(void); |
ae00d812 | 102 | |
d4b7dc49 | 103 | /* |
a6e0887f | 104 | * The story of _OSI(Linux) |
d4b7dc49 | 105 | * |
a6e0887f LB |
106 | * From pre-history through Linux-2.6.22, |
107 | * Linux responded TRUE upon a BIOS OSI(Linux) query. | |
d4b7dc49 | 108 | * |
a6e0887f LB |
109 | * Unfortunately, reference BIOS writers got wind of this |
110 | * and put OSI(Linux) in their example code, quickly exposing | |
111 | * this string as ill-conceived and opening the door to | |
112 | * an un-bounded number of BIOS incompatibilities. | |
d4b7dc49 | 113 | * |
a6e0887f LB |
114 | * For example, OSI(Linux) was used on resume to re-POST a |
115 | * video card on one system, because Linux at that time | |
116 | * could not do a speedy restore in its native driver. | |
117 | * But then upon gaining quick native restore capability, | |
118 | * Linux has no way to tell the BIOS to skip the time-consuming | |
119 | * POST -- putting Linux at a permanent performance disadvantage. | |
120 | * On another system, the BIOS writer used OSI(Linux) | |
121 | * to infer native OS support for IPMI! On other systems, | |
122 | * OSI(Linux) simply got in the way of Linux claiming to | |
123 | * be compatible with other operating systems, exposing | |
124 | * BIOS issues such as skipped device initialization. | |
d4b7dc49 | 125 | * |
a6e0887f LB |
126 | * So "Linux" turned out to be a really poor chose of |
127 | * OSI string, and from Linux-2.6.23 onward we respond FALSE. | |
d4b7dc49 LB |
128 | * |
129 | * BIOS writers should NOT query _OSI(Linux) on future systems. | |
a6e0887f LB |
130 | * Linux will complain on the console when it sees it, and return FALSE. |
131 | * To get Linux to return TRUE for your system will require | |
132 | * a kernel source update to add a DMI entry, | |
133 | * or boot with "acpi_osi=Linux" | |
d4b7dc49 | 134 | */ |
d4b7dc49 | 135 | |
1d15d84e | 136 | static struct osi_linux { |
d4b7dc49 LB |
137 | unsigned int enable:1; |
138 | unsigned int dmi:1; | |
139 | unsigned int cmdline:1; | |
d90aa92c | 140 | } osi_linux = {0, 0, 0}; |
f507654d | 141 | |
b0ed7a91 LM |
142 | static u32 acpi_osi_handler(acpi_string interface, u32 supported) |
143 | { | |
144 | if (!strcmp("Linux", interface)) { | |
145 | ||
8997621b | 146 | printk_once(KERN_NOTICE FW_BUG PREFIX |
b0ed7a91 LM |
147 | "BIOS _OSI(Linux) query %s%s\n", |
148 | osi_linux.enable ? "honored" : "ignored", | |
149 | osi_linux.cmdline ? " via cmdline" : | |
150 | osi_linux.dmi ? " via DMI" : ""); | |
151 | } | |
152 | ||
153 | return supported; | |
154 | } | |
155 | ||
bc9ffce2 | 156 | static void __init acpi_request_region (struct acpi_generic_address *gas, |
9a47cdb1 BH |
157 | unsigned int length, char *desc) |
158 | { | |
bc9ffce2 MS |
159 | u64 addr; |
160 | ||
161 | /* Handle possible alignment issues */ | |
162 | memcpy(&addr, &gas->address, sizeof(addr)); | |
163 | if (!addr || !length) | |
9a47cdb1 BH |
164 | return; |
165 | ||
cfa806f0 | 166 | /* Resources are never freed */ |
bc9ffce2 MS |
167 | if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_IO) |
168 | request_region(addr, length, desc); | |
169 | else if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) | |
170 | request_mem_region(addr, length, desc); | |
9a47cdb1 BH |
171 | } |
172 | ||
173 | static int __init acpi_reserve_resources(void) | |
174 | { | |
eee3c859 | 175 | acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
176 | "ACPI PM1a_EVT_BLK"); |
177 | ||
eee3c859 | 178 | acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
179 | "ACPI PM1b_EVT_BLK"); |
180 | ||
eee3c859 | 181 | acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
182 | "ACPI PM1a_CNT_BLK"); |
183 | ||
eee3c859 | 184 | acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
185 | "ACPI PM1b_CNT_BLK"); |
186 | ||
eee3c859 LB |
187 | if (acpi_gbl_FADT.pm_timer_length == 4) |
188 | acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR"); | |
9a47cdb1 | 189 | |
eee3c859 | 190 | acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length, |
9a47cdb1 BH |
191 | "ACPI PM2_CNT_BLK"); |
192 | ||
193 | /* Length of GPE blocks must be a non-negative multiple of 2 */ | |
194 | ||
eee3c859 LB |
195 | if (!(acpi_gbl_FADT.gpe0_block_length & 0x1)) |
196 | acpi_request_region(&acpi_gbl_FADT.xgpe0_block, | |
197 | acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK"); | |
9a47cdb1 | 198 | |
eee3c859 LB |
199 | if (!(acpi_gbl_FADT.gpe1_block_length & 0x1)) |
200 | acpi_request_region(&acpi_gbl_FADT.xgpe1_block, | |
201 | acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK"); | |
9a47cdb1 BH |
202 | |
203 | return 0; | |
204 | } | |
205 | device_initcall(acpi_reserve_resources); | |
206 | ||
4be44fcd | 207 | void acpi_os_printf(const char *fmt, ...) |
1da177e4 LT |
208 | { |
209 | va_list args; | |
210 | va_start(args, fmt); | |
211 | acpi_os_vprintf(fmt, args); | |
212 | va_end(args); | |
213 | } | |
4be44fcd | 214 | |
4be44fcd | 215 | void acpi_os_vprintf(const char *fmt, va_list args) |
1da177e4 LT |
216 | { |
217 | static char buffer[512]; | |
4be44fcd | 218 | |
1da177e4 LT |
219 | vsprintf(buffer, fmt, args); |
220 | ||
221 | #ifdef ENABLE_DEBUGGER | |
222 | if (acpi_in_debugger) { | |
223 | kdb_printf("%s", buffer); | |
224 | } else { | |
4d939155 | 225 | printk(KERN_CONT "%s", buffer); |
1da177e4 LT |
226 | } |
227 | #else | |
4d939155 | 228 | printk(KERN_CONT "%s", buffer); |
1da177e4 LT |
229 | #endif |
230 | } | |
231 | ||
4996c023 TI |
232 | #ifdef CONFIG_KEXEC |
233 | static unsigned long acpi_rsdp; | |
234 | static int __init setup_acpi_rsdp(char *arg) | |
235 | { | |
236 | acpi_rsdp = simple_strtoul(arg, NULL, 16); | |
237 | return 0; | |
238 | } | |
239 | early_param("acpi_rsdp", setup_acpi_rsdp); | |
240 | #endif | |
241 | ||
ad71860a | 242 | acpi_physical_address __init acpi_os_get_root_pointer(void) |
1da177e4 | 243 | { |
4996c023 TI |
244 | #ifdef CONFIG_KEXEC |
245 | if (acpi_rsdp) | |
246 | return acpi_rsdp; | |
247 | #endif | |
248 | ||
1da177e4 | 249 | if (efi_enabled) { |
b2c99e3c | 250 | if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) |
ad71860a | 251 | return efi.acpi20; |
b2c99e3c | 252 | else if (efi.acpi != EFI_INVALID_TABLE_ADDR) |
ad71860a | 253 | return efi.acpi; |
1da177e4 | 254 | else { |
4be44fcd LB |
255 | printk(KERN_ERR PREFIX |
256 | "System description tables not found\n"); | |
ad71860a | 257 | return 0; |
1da177e4 | 258 | } |
239665a3 LB |
259 | } else { |
260 | acpi_physical_address pa = 0; | |
261 | ||
262 | acpi_find_root_pointer(&pa); | |
263 | return pa; | |
264 | } | |
1da177e4 LT |
265 | } |
266 | ||
78cdb3ed | 267 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ |
4a3cba5e MS |
268 | static struct acpi_ioremap * |
269 | acpi_map_lookup(acpi_physical_address phys, acpi_size size) | |
620242ae MS |
270 | { |
271 | struct acpi_ioremap *map; | |
272 | ||
78cdb3ed | 273 | list_for_each_entry_rcu(map, &acpi_ioremaps, list) |
620242ae MS |
274 | if (map->phys <= phys && |
275 | phys + size <= map->phys + map->size) | |
4a3cba5e MS |
276 | return map; |
277 | ||
278 | return NULL; | |
279 | } | |
280 | ||
281 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ | |
282 | static void __iomem * | |
283 | acpi_map_vaddr_lookup(acpi_physical_address phys, unsigned int size) | |
284 | { | |
285 | struct acpi_ioremap *map; | |
286 | ||
287 | map = acpi_map_lookup(phys, size); | |
288 | if (map) | |
289 | return map->virt + (phys - map->phys); | |
620242ae MS |
290 | |
291 | return NULL; | |
292 | } | |
293 | ||
13606a2d RW |
294 | void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size) |
295 | { | |
296 | struct acpi_ioremap *map; | |
297 | void __iomem *virt = NULL; | |
298 | ||
299 | mutex_lock(&acpi_ioremap_lock); | |
300 | map = acpi_map_lookup(phys, size); | |
301 | if (map) { | |
302 | virt = map->virt + (phys - map->phys); | |
303 | map->refcount++; | |
304 | } | |
305 | mutex_unlock(&acpi_ioremap_lock); | |
306 | return virt; | |
307 | } | |
308 | EXPORT_SYMBOL_GPL(acpi_os_get_iomem); | |
309 | ||
78cdb3ed | 310 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ |
620242ae MS |
311 | static struct acpi_ioremap * |
312 | acpi_map_lookup_virt(void __iomem *virt, acpi_size size) | |
313 | { | |
314 | struct acpi_ioremap *map; | |
315 | ||
78cdb3ed | 316 | list_for_each_entry_rcu(map, &acpi_ioremaps, list) |
4a3cba5e MS |
317 | if (map->virt <= virt && |
318 | virt + size <= map->virt + map->size) | |
620242ae MS |
319 | return map; |
320 | ||
321 | return NULL; | |
322 | } | |
323 | ||
2fdf0741 JB |
324 | void __iomem *__init_refok |
325 | acpi_os_map_memory(acpi_physical_address phys, acpi_size size) | |
1da177e4 | 326 | { |
7ffd0443 | 327 | struct acpi_ioremap *map; |
620242ae | 328 | void __iomem *virt; |
2d6d9fd3 RW |
329 | acpi_physical_address pg_off; |
330 | acpi_size pg_sz; | |
620242ae | 331 | |
9f4fd61f BH |
332 | if (phys > ULONG_MAX) { |
333 | printk(KERN_ERR PREFIX "Cannot map memory that high\n"); | |
70c0846e | 334 | return NULL; |
1da177e4 | 335 | } |
620242ae MS |
336 | |
337 | if (!acpi_gbl_permanent_mmap) | |
ad71860a | 338 | return __acpi_map_table((unsigned long)phys, size); |
620242ae | 339 | |
7ffd0443 RW |
340 | mutex_lock(&acpi_ioremap_lock); |
341 | /* Check if there's a suitable mapping already. */ | |
342 | map = acpi_map_lookup(phys, size); | |
343 | if (map) { | |
b7c1fadd | 344 | map->refcount++; |
7ffd0443 RW |
345 | goto out; |
346 | } | |
347 | ||
620242ae | 348 | map = kzalloc(sizeof(*map), GFP_KERNEL); |
7ffd0443 RW |
349 | if (!map) { |
350 | mutex_unlock(&acpi_ioremap_lock); | |
620242ae | 351 | return NULL; |
7ffd0443 | 352 | } |
620242ae | 353 | |
4a3cba5e MS |
354 | pg_off = round_down(phys, PAGE_SIZE); |
355 | pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off; | |
2d6d9fd3 | 356 | virt = acpi_os_ioremap(pg_off, pg_sz); |
620242ae | 357 | if (!virt) { |
7ffd0443 | 358 | mutex_unlock(&acpi_ioremap_lock); |
620242ae MS |
359 | kfree(map); |
360 | return NULL; | |
361 | } | |
362 | ||
363 | INIT_LIST_HEAD(&map->list); | |
364 | map->virt = virt; | |
4a3cba5e MS |
365 | map->phys = pg_off; |
366 | map->size = pg_sz; | |
b7c1fadd | 367 | map->refcount = 1; |
620242ae | 368 | |
78cdb3ed | 369 | list_add_tail_rcu(&map->list, &acpi_ioremaps); |
620242ae | 370 | |
7ffd0443 RW |
371 | out: |
372 | mutex_unlock(&acpi_ioremap_lock); | |
4a3cba5e | 373 | return map->virt + (phys - map->phys); |
1da177e4 | 374 | } |
55a82ab3 | 375 | EXPORT_SYMBOL_GPL(acpi_os_map_memory); |
1da177e4 | 376 | |
b7c1fadd | 377 | static void acpi_os_drop_map_ref(struct acpi_ioremap *map) |
4a3cba5e | 378 | { |
b7c1fadd RW |
379 | if (!--map->refcount) |
380 | list_del_rcu(&map->list); | |
4a3cba5e | 381 | } |
4a3cba5e | 382 | |
b7c1fadd | 383 | static void acpi_os_map_cleanup(struct acpi_ioremap *map) |
7fe135dc | 384 | { |
b7c1fadd RW |
385 | if (!map->refcount) { |
386 | synchronize_rcu(); | |
387 | iounmap(map->virt); | |
388 | kfree(map); | |
389 | } | |
4a3cba5e MS |
390 | } |
391 | ||
0d3a9cf5 | 392 | void __ref acpi_os_unmap_memory(void __iomem *virt, acpi_size size) |
1da177e4 | 393 | { |
620242ae | 394 | struct acpi_ioremap *map; |
620242ae MS |
395 | |
396 | if (!acpi_gbl_permanent_mmap) { | |
7d97277b | 397 | __acpi_unmap_table(virt, size); |
620242ae MS |
398 | return; |
399 | } | |
400 | ||
7bbb8903 | 401 | mutex_lock(&acpi_ioremap_lock); |
620242ae MS |
402 | map = acpi_map_lookup_virt(virt, size); |
403 | if (!map) { | |
7bbb8903 | 404 | mutex_unlock(&acpi_ioremap_lock); |
7fe135dc | 405 | WARN(true, PREFIX "%s: bad address %p\n", __func__, virt); |
620242ae MS |
406 | return; |
407 | } | |
b7c1fadd | 408 | acpi_os_drop_map_ref(map); |
7bbb8903 | 409 | mutex_unlock(&acpi_ioremap_lock); |
620242ae | 410 | |
b7c1fadd | 411 | acpi_os_map_cleanup(map); |
1da177e4 | 412 | } |
55a82ab3 | 413 | EXPORT_SYMBOL_GPL(acpi_os_unmap_memory); |
1da177e4 | 414 | |
0d3a9cf5 | 415 | void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size) |
7d97277b YL |
416 | { |
417 | if (!acpi_gbl_permanent_mmap) | |
418 | __acpi_unmap_table(virt, size); | |
419 | } | |
420 | ||
6f68c91c | 421 | int acpi_os_map_generic_address(struct acpi_generic_address *gas) |
29718521 | 422 | { |
bc9ffce2 | 423 | u64 addr; |
29718521 MS |
424 | void __iomem *virt; |
425 | ||
bc9ffce2 | 426 | if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) |
29718521 MS |
427 | return 0; |
428 | ||
bc9ffce2 MS |
429 | /* Handle possible alignment issues */ |
430 | memcpy(&addr, &gas->address, sizeof(addr)); | |
431 | if (!addr || !gas->bit_width) | |
29718521 MS |
432 | return -EINVAL; |
433 | ||
bc9ffce2 | 434 | virt = acpi_os_map_memory(addr, gas->bit_width / 8); |
29718521 MS |
435 | if (!virt) |
436 | return -EIO; | |
437 | ||
438 | return 0; | |
439 | } | |
6f68c91c | 440 | EXPORT_SYMBOL(acpi_os_map_generic_address); |
29718521 | 441 | |
6f68c91c | 442 | void acpi_os_unmap_generic_address(struct acpi_generic_address *gas) |
29718521 | 443 | { |
bc9ffce2 | 444 | u64 addr; |
7fe135dc | 445 | struct acpi_ioremap *map; |
29718521 | 446 | |
bc9ffce2 | 447 | if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) |
29718521 MS |
448 | return; |
449 | ||
bc9ffce2 MS |
450 | /* Handle possible alignment issues */ |
451 | memcpy(&addr, &gas->address, sizeof(addr)); | |
452 | if (!addr || !gas->bit_width) | |
29718521 MS |
453 | return; |
454 | ||
7bbb8903 | 455 | mutex_lock(&acpi_ioremap_lock); |
bc9ffce2 | 456 | map = acpi_map_lookup(addr, gas->bit_width / 8); |
7fe135dc RW |
457 | if (!map) { |
458 | mutex_unlock(&acpi_ioremap_lock); | |
459 | return; | |
460 | } | |
b7c1fadd | 461 | acpi_os_drop_map_ref(map); |
7bbb8903 | 462 | mutex_unlock(&acpi_ioremap_lock); |
29718521 | 463 | |
b7c1fadd | 464 | acpi_os_map_cleanup(map); |
29718521 | 465 | } |
6f68c91c | 466 | EXPORT_SYMBOL(acpi_os_unmap_generic_address); |
29718521 | 467 | |
1da177e4 LT |
468 | #ifdef ACPI_FUTURE_USAGE |
469 | acpi_status | |
4be44fcd | 470 | acpi_os_get_physical_address(void *virt, acpi_physical_address * phys) |
1da177e4 | 471 | { |
4be44fcd | 472 | if (!phys || !virt) |
1da177e4 LT |
473 | return AE_BAD_PARAMETER; |
474 | ||
475 | *phys = virt_to_phys(virt); | |
476 | ||
477 | return AE_OK; | |
478 | } | |
479 | #endif | |
480 | ||
481 | #define ACPI_MAX_OVERRIDE_LEN 100 | |
482 | ||
483 | static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN]; | |
484 | ||
485 | acpi_status | |
4be44fcd LB |
486 | acpi_os_predefined_override(const struct acpi_predefined_names *init_val, |
487 | acpi_string * new_val) | |
1da177e4 LT |
488 | { |
489 | if (!init_val || !new_val) | |
490 | return AE_BAD_PARAMETER; | |
491 | ||
492 | *new_val = NULL; | |
4be44fcd | 493 | if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) { |
1da177e4 | 494 | printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n", |
4be44fcd | 495 | acpi_os_name); |
1da177e4 LT |
496 | *new_val = acpi_os_name; |
497 | } | |
498 | ||
499 | return AE_OK; | |
500 | } | |
501 | ||
502 | acpi_status | |
4be44fcd LB |
503 | acpi_os_table_override(struct acpi_table_header * existing_table, |
504 | struct acpi_table_header ** new_table) | |
1da177e4 LT |
505 | { |
506 | if (!existing_table || !new_table) | |
507 | return AE_BAD_PARAMETER; | |
508 | ||
71fc47a9 MG |
509 | *new_table = NULL; |
510 | ||
1da177e4 LT |
511 | #ifdef CONFIG_ACPI_CUSTOM_DSDT |
512 | if (strncmp(existing_table->signature, "DSDT", 4) == 0) | |
4be44fcd | 513 | *new_table = (struct acpi_table_header *)AmlCode; |
1da177e4 | 514 | #endif |
6ed31e92 ÉP |
515 | if (*new_table != NULL) { |
516 | printk(KERN_WARNING PREFIX "Override [%4.4s-%8.8s], " | |
517 | "this is unsafe: tainting kernel\n", | |
518 | existing_table->signature, | |
519 | existing_table->oem_table_id); | |
520 | add_taint(TAINT_OVERRIDDEN_ACPI_TABLE); | |
521 | } | |
1da177e4 LT |
522 | return AE_OK; |
523 | } | |
524 | ||
7d12e780 | 525 | static irqreturn_t acpi_irq(int irq, void *dev_id) |
1da177e4 | 526 | { |
5229e87d LB |
527 | u32 handled; |
528 | ||
529 | handled = (*acpi_irq_handler) (acpi_irq_context); | |
530 | ||
531 | if (handled) { | |
532 | acpi_irq_handled++; | |
533 | return IRQ_HANDLED; | |
88bea188 LB |
534 | } else { |
535 | acpi_irq_not_handled++; | |
5229e87d | 536 | return IRQ_NONE; |
88bea188 | 537 | } |
1da177e4 LT |
538 | } |
539 | ||
540 | acpi_status | |
4be44fcd LB |
541 | acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler, |
542 | void *context) | |
1da177e4 LT |
543 | { |
544 | unsigned int irq; | |
545 | ||
5229e87d LB |
546 | acpi_irq_stats_init(); |
547 | ||
1da177e4 | 548 | /* |
23fe3630 RW |
549 | * ACPI interrupts different from the SCI in our copy of the FADT are |
550 | * not supported. | |
1da177e4 | 551 | */ |
23fe3630 RW |
552 | if (gsi != acpi_gbl_FADT.sci_interrupt) |
553 | return AE_BAD_PARAMETER; | |
554 | ||
555 | if (acpi_irq_handler) | |
556 | return AE_ALREADY_ACQUIRED; | |
557 | ||
1da177e4 LT |
558 | if (acpi_gsi_to_irq(gsi, &irq) < 0) { |
559 | printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n", | |
560 | gsi); | |
561 | return AE_OK; | |
562 | } | |
563 | ||
564 | acpi_irq_handler = handler; | |
565 | acpi_irq_context = context; | |
dace1453 | 566 | if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) { |
1da177e4 | 567 | printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq); |
23fe3630 | 568 | acpi_irq_handler = NULL; |
1da177e4 LT |
569 | return AE_NOT_ACQUIRED; |
570 | } | |
1da177e4 LT |
571 | |
572 | return AE_OK; | |
573 | } | |
574 | ||
4be44fcd | 575 | acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler) |
1da177e4 | 576 | { |
23fe3630 RW |
577 | if (irq != acpi_gbl_FADT.sci_interrupt) |
578 | return AE_BAD_PARAMETER; | |
579 | ||
580 | free_irq(irq, acpi_irq); | |
581 | acpi_irq_handler = NULL; | |
1da177e4 LT |
582 | |
583 | return AE_OK; | |
584 | } | |
585 | ||
586 | /* | |
587 | * Running in interpreter thread context, safe to sleep | |
588 | */ | |
589 | ||
439913ff | 590 | void acpi_os_sleep(u64 ms) |
1da177e4 | 591 | { |
01a527ec | 592 | schedule_timeout_interruptible(msecs_to_jiffies(ms)); |
1da177e4 | 593 | } |
4be44fcd | 594 | |
4be44fcd | 595 | void acpi_os_stall(u32 us) |
1da177e4 LT |
596 | { |
597 | while (us) { | |
598 | u32 delay = 1000; | |
599 | ||
600 | if (delay > us) | |
601 | delay = us; | |
602 | udelay(delay); | |
603 | touch_nmi_watchdog(); | |
604 | us -= delay; | |
605 | } | |
606 | } | |
4be44fcd | 607 | |
1da177e4 LT |
608 | /* |
609 | * Support ACPI 3.0 AML Timer operand | |
610 | * Returns 64-bit free-running, monotonically increasing timer | |
611 | * with 100ns granularity | |
612 | */ | |
4be44fcd | 613 | u64 acpi_os_get_timer(void) |
1da177e4 LT |
614 | { |
615 | static u64 t; | |
616 | ||
617 | #ifdef CONFIG_HPET | |
618 | /* TBD: use HPET if available */ | |
619 | #endif | |
620 | ||
621 | #ifdef CONFIG_X86_PM_TIMER | |
622 | /* TBD: default to PM timer if HPET was not available */ | |
623 | #endif | |
624 | if (!t) | |
625 | printk(KERN_ERR PREFIX "acpi_os_get_timer() TBD\n"); | |
626 | ||
627 | return ++t; | |
628 | } | |
629 | ||
4be44fcd | 630 | acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width) |
1da177e4 LT |
631 | { |
632 | u32 dummy; | |
633 | ||
634 | if (!value) | |
635 | value = &dummy; | |
636 | ||
49fbabf5 ZY |
637 | *value = 0; |
638 | if (width <= 8) { | |
4be44fcd | 639 | *(u8 *) value = inb(port); |
49fbabf5 | 640 | } else if (width <= 16) { |
4be44fcd | 641 | *(u16 *) value = inw(port); |
49fbabf5 | 642 | } else if (width <= 32) { |
4be44fcd | 643 | *(u32 *) value = inl(port); |
49fbabf5 | 644 | } else { |
1da177e4 LT |
645 | BUG(); |
646 | } | |
647 | ||
648 | return AE_OK; | |
649 | } | |
4be44fcd | 650 | |
1da177e4 LT |
651 | EXPORT_SYMBOL(acpi_os_read_port); |
652 | ||
4be44fcd | 653 | acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width) |
1da177e4 | 654 | { |
49fbabf5 | 655 | if (width <= 8) { |
1da177e4 | 656 | outb(value, port); |
49fbabf5 | 657 | } else if (width <= 16) { |
1da177e4 | 658 | outw(value, port); |
49fbabf5 | 659 | } else if (width <= 32) { |
1da177e4 | 660 | outl(value, port); |
49fbabf5 | 661 | } else { |
1da177e4 LT |
662 | BUG(); |
663 | } | |
664 | ||
665 | return AE_OK; | |
666 | } | |
4be44fcd | 667 | |
1da177e4 LT |
668 | EXPORT_SYMBOL(acpi_os_write_port); |
669 | ||
670 | acpi_status | |
4be44fcd | 671 | acpi_os_read_memory(acpi_physical_address phys_addr, u32 * value, u32 width) |
1da177e4 | 672 | { |
4be44fcd | 673 | void __iomem *virt_addr; |
884b821f RW |
674 | unsigned int size = width / 8; |
675 | bool unmap = false; | |
676 | u32 dummy; | |
620242ae | 677 | |
78cdb3ed | 678 | rcu_read_lock(); |
620242ae | 679 | virt_addr = acpi_map_vaddr_lookup(phys_addr, size); |
620242ae | 680 | if (!virt_addr) { |
884b821f | 681 | rcu_read_unlock(); |
2d6d9fd3 | 682 | virt_addr = acpi_os_ioremap(phys_addr, size); |
884b821f RW |
683 | if (!virt_addr) |
684 | return AE_BAD_ADDRESS; | |
685 | unmap = true; | |
620242ae | 686 | } |
884b821f | 687 | |
1da177e4 LT |
688 | if (!value) |
689 | value = &dummy; | |
690 | ||
691 | switch (width) { | |
692 | case 8: | |
4be44fcd | 693 | *(u8 *) value = readb(virt_addr); |
1da177e4 LT |
694 | break; |
695 | case 16: | |
4be44fcd | 696 | *(u16 *) value = readw(virt_addr); |
1da177e4 LT |
697 | break; |
698 | case 32: | |
4be44fcd | 699 | *(u32 *) value = readl(virt_addr); |
1da177e4 LT |
700 | break; |
701 | default: | |
702 | BUG(); | |
703 | } | |
704 | ||
620242ae MS |
705 | if (unmap) |
706 | iounmap(virt_addr); | |
884b821f RW |
707 | else |
708 | rcu_read_unlock(); | |
1da177e4 LT |
709 | |
710 | return AE_OK; | |
711 | } | |
712 | ||
713 | acpi_status | |
4be44fcd | 714 | acpi_os_write_memory(acpi_physical_address phys_addr, u32 value, u32 width) |
1da177e4 | 715 | { |
4be44fcd | 716 | void __iomem *virt_addr; |
884b821f RW |
717 | unsigned int size = width / 8; |
718 | bool unmap = false; | |
620242ae | 719 | |
78cdb3ed | 720 | rcu_read_lock(); |
620242ae | 721 | virt_addr = acpi_map_vaddr_lookup(phys_addr, size); |
620242ae | 722 | if (!virt_addr) { |
884b821f | 723 | rcu_read_unlock(); |
2d6d9fd3 | 724 | virt_addr = acpi_os_ioremap(phys_addr, size); |
884b821f RW |
725 | if (!virt_addr) |
726 | return AE_BAD_ADDRESS; | |
727 | unmap = true; | |
620242ae | 728 | } |
1da177e4 LT |
729 | |
730 | switch (width) { | |
731 | case 8: | |
732 | writeb(value, virt_addr); | |
733 | break; | |
734 | case 16: | |
735 | writew(value, virt_addr); | |
736 | break; | |
737 | case 32: | |
738 | writel(value, virt_addr); | |
739 | break; | |
740 | default: | |
741 | BUG(); | |
742 | } | |
743 | ||
620242ae MS |
744 | if (unmap) |
745 | iounmap(virt_addr); | |
884b821f RW |
746 | else |
747 | rcu_read_unlock(); | |
1da177e4 LT |
748 | |
749 | return AE_OK; | |
750 | } | |
751 | ||
1da177e4 | 752 | acpi_status |
4be44fcd | 753 | acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
c5f0231e | 754 | u64 *value, u32 width) |
1da177e4 LT |
755 | { |
756 | int result, size; | |
c5f0231e | 757 | u32 value32; |
1da177e4 LT |
758 | |
759 | if (!value) | |
760 | return AE_BAD_PARAMETER; | |
761 | ||
762 | switch (width) { | |
763 | case 8: | |
764 | size = 1; | |
765 | break; | |
766 | case 16: | |
767 | size = 2; | |
768 | break; | |
769 | case 32: | |
770 | size = 4; | |
771 | break; | |
772 | default: | |
773 | return AE_ERROR; | |
774 | } | |
775 | ||
b6ce068a MW |
776 | result = raw_pci_read(pci_id->segment, pci_id->bus, |
777 | PCI_DEVFN(pci_id->device, pci_id->function), | |
c5f0231e BM |
778 | reg, size, &value32); |
779 | *value = value32; | |
1da177e4 LT |
780 | |
781 | return (result ? AE_ERROR : AE_OK); | |
782 | } | |
4be44fcd | 783 | |
1da177e4 | 784 | acpi_status |
4be44fcd | 785 | acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
439913ff | 786 | u64 value, u32 width) |
1da177e4 LT |
787 | { |
788 | int result, size; | |
789 | ||
790 | switch (width) { | |
791 | case 8: | |
792 | size = 1; | |
793 | break; | |
794 | case 16: | |
795 | size = 2; | |
796 | break; | |
797 | case 32: | |
798 | size = 4; | |
799 | break; | |
800 | default: | |
801 | return AE_ERROR; | |
802 | } | |
803 | ||
b6ce068a MW |
804 | result = raw_pci_write(pci_id->segment, pci_id->bus, |
805 | PCI_DEVFN(pci_id->device, pci_id->function), | |
806 | reg, size, value); | |
1da177e4 LT |
807 | |
808 | return (result ? AE_ERROR : AE_OK); | |
809 | } | |
810 | ||
65f27f38 | 811 | static void acpi_os_execute_deferred(struct work_struct *work) |
88db5e14 AS |
812 | { |
813 | struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work); | |
88db5e14 | 814 | |
9ac61856 BH |
815 | if (dpc->wait) |
816 | acpi_os_wait_events_complete(NULL); | |
19cd847a ZR |
817 | |
818 | dpc->function(dpc->context); | |
819 | kfree(dpc); | |
19cd847a ZR |
820 | } |
821 | ||
b8d35192 AS |
822 | /******************************************************************************* |
823 | * | |
824 | * FUNCTION: acpi_os_execute | |
825 | * | |
826 | * PARAMETERS: Type - Type of the callback | |
827 | * Function - Function to be executed | |
828 | * Context - Function parameters | |
829 | * | |
830 | * RETURN: Status | |
831 | * | |
832 | * DESCRIPTION: Depending on type, either queues function for deferred execution or | |
833 | * immediately executes function on a separate thread. | |
834 | * | |
835 | ******************************************************************************/ | |
836 | ||
19cd847a ZR |
837 | static acpi_status __acpi_os_execute(acpi_execute_type type, |
838 | acpi_osd_exec_callback function, void *context, int hp) | |
1da177e4 | 839 | { |
4be44fcd LB |
840 | acpi_status status = AE_OK; |
841 | struct acpi_os_dpc *dpc; | |
17bc54ee | 842 | struct workqueue_struct *queue; |
19cd847a | 843 | int ret; |
72945b2b LB |
844 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
845 | "Scheduling function [%p(%p)] for deferred execution.\n", | |
846 | function, context)); | |
1da177e4 | 847 | |
1da177e4 LT |
848 | /* |
849 | * Allocate/initialize DPC structure. Note that this memory will be | |
65f27f38 | 850 | * freed by the callee. The kernel handles the work_struct list in a |
1da177e4 LT |
851 | * way that allows us to also free its memory inside the callee. |
852 | * Because we may want to schedule several tasks with different | |
853 | * parameters we can't use the approach some kernel code uses of | |
65f27f38 | 854 | * having a static work_struct. |
1da177e4 | 855 | */ |
72945b2b | 856 | |
65f27f38 | 857 | dpc = kmalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC); |
1da177e4 | 858 | if (!dpc) |
889c78be | 859 | return AE_NO_MEMORY; |
b976fe19 | 860 | |
1da177e4 LT |
861 | dpc->function = function; |
862 | dpc->context = context; | |
b976fe19 | 863 | |
c02256be ZR |
864 | /* |
865 | * We can't run hotplug code in keventd_wq/kacpid_wq/kacpid_notify_wq | |
866 | * because the hotplug code may call driver .remove() functions, | |
867 | * which invoke flush_scheduled_work/acpi_os_wait_events_complete | |
868 | * to flush these workqueues. | |
869 | */ | |
870 | queue = hp ? kacpi_hotplug_wq : | |
871 | (type == OSL_NOTIFY_HANDLER ? kacpi_notify_wq : kacpid_wq); | |
9ac61856 | 872 | dpc->wait = hp ? 1 : 0; |
bc73675b ZR |
873 | |
874 | if (queue == kacpi_hotplug_wq) | |
875 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); | |
876 | else if (queue == kacpi_notify_wq) | |
877 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); | |
878 | else | |
879 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); | |
880 | ||
8fec62b2 TH |
881 | /* |
882 | * On some machines, a software-initiated SMI causes corruption unless | |
883 | * the SMI runs on CPU 0. An SMI can be initiated by any AML, but | |
884 | * typically it's done in GPE-related methods that are run via | |
885 | * workqueues, so we can avoid the known corruption cases by always | |
886 | * queueing on CPU 0. | |
887 | */ | |
888 | ret = queue_work_on(0, queue, &dpc->work); | |
19cd847a ZR |
889 | |
890 | if (!ret) { | |
55ac9a01 LM |
891 | printk(KERN_ERR PREFIX |
892 | "Call to queue_work() failed.\n"); | |
17bc54ee AS |
893 | status = AE_ERROR; |
894 | kfree(dpc); | |
1da177e4 | 895 | } |
889c78be | 896 | return status; |
1da177e4 | 897 | } |
4be44fcd | 898 | |
19cd847a ZR |
899 | acpi_status acpi_os_execute(acpi_execute_type type, |
900 | acpi_osd_exec_callback function, void *context) | |
901 | { | |
902 | return __acpi_os_execute(type, function, context, 0); | |
903 | } | |
b8d35192 | 904 | EXPORT_SYMBOL(acpi_os_execute); |
1da177e4 | 905 | |
19cd847a ZR |
906 | acpi_status acpi_os_hotplug_execute(acpi_osd_exec_callback function, |
907 | void *context) | |
908 | { | |
909 | return __acpi_os_execute(0, function, context, 1); | |
910 | } | |
911 | ||
4be44fcd | 912 | void acpi_os_wait_events_complete(void *context) |
1da177e4 LT |
913 | { |
914 | flush_workqueue(kacpid_wq); | |
2f67a069 | 915 | flush_workqueue(kacpi_notify_wq); |
1da177e4 | 916 | } |
4be44fcd | 917 | |
1da177e4 LT |
918 | EXPORT_SYMBOL(acpi_os_wait_events_complete); |
919 | ||
1da177e4 | 920 | acpi_status |
4be44fcd | 921 | acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle) |
1da177e4 | 922 | { |
4be44fcd | 923 | struct semaphore *sem = NULL; |
1da177e4 | 924 | |
1da177e4 LT |
925 | sem = acpi_os_allocate(sizeof(struct semaphore)); |
926 | if (!sem) | |
d550d98d | 927 | return AE_NO_MEMORY; |
1da177e4 LT |
928 | memset(sem, 0, sizeof(struct semaphore)); |
929 | ||
930 | sema_init(sem, initial_units); | |
931 | ||
4be44fcd | 932 | *handle = (acpi_handle *) sem; |
1da177e4 | 933 | |
4be44fcd LB |
934 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n", |
935 | *handle, initial_units)); | |
1da177e4 | 936 | |
d550d98d | 937 | return AE_OK; |
1da177e4 | 938 | } |
1da177e4 | 939 | |
1da177e4 LT |
940 | /* |
941 | * TODO: A better way to delete semaphores? Linux doesn't have a | |
942 | * 'delete_semaphore()' function -- may result in an invalid | |
943 | * pointer dereference for non-synchronized consumers. Should | |
944 | * we at least check for blocked threads and signal/cancel them? | |
945 | */ | |
946 | ||
4be44fcd | 947 | acpi_status acpi_os_delete_semaphore(acpi_handle handle) |
1da177e4 | 948 | { |
4be44fcd | 949 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 950 | |
1da177e4 | 951 | if (!sem) |
d550d98d | 952 | return AE_BAD_PARAMETER; |
1da177e4 | 953 | |
4be44fcd | 954 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle)); |
1da177e4 | 955 | |
f1241c87 | 956 | BUG_ON(!list_empty(&sem->wait_list)); |
02438d87 | 957 | kfree(sem); |
4be44fcd | 958 | sem = NULL; |
1da177e4 | 959 | |
d550d98d | 960 | return AE_OK; |
1da177e4 | 961 | } |
1da177e4 | 962 | |
1da177e4 | 963 | /* |
1da177e4 LT |
964 | * TODO: Support for units > 1? |
965 | */ | |
4be44fcd | 966 | acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout) |
1da177e4 | 967 | { |
4be44fcd LB |
968 | acpi_status status = AE_OK; |
969 | struct semaphore *sem = (struct semaphore *)handle; | |
f1241c87 | 970 | long jiffies; |
4be44fcd | 971 | int ret = 0; |
1da177e4 | 972 | |
1da177e4 | 973 | if (!sem || (units < 1)) |
d550d98d | 974 | return AE_BAD_PARAMETER; |
1da177e4 LT |
975 | |
976 | if (units > 1) | |
d550d98d | 977 | return AE_SUPPORT; |
1da177e4 | 978 | |
4be44fcd LB |
979 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n", |
980 | handle, units, timeout)); | |
1da177e4 | 981 | |
f1241c87 MW |
982 | if (timeout == ACPI_WAIT_FOREVER) |
983 | jiffies = MAX_SCHEDULE_TIMEOUT; | |
984 | else | |
985 | jiffies = msecs_to_jiffies(timeout); | |
986 | ||
987 | ret = down_timeout(sem, jiffies); | |
988 | if (ret) | |
989 | status = AE_TIME; | |
1da177e4 LT |
990 | |
991 | if (ACPI_FAILURE(status)) { | |
9e7e2c04 | 992 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, |
a6fc6720 | 993 | "Failed to acquire semaphore[%p|%d|%d], %s", |
4be44fcd LB |
994 | handle, units, timeout, |
995 | acpi_format_exception(status))); | |
996 | } else { | |
997 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, | |
a6fc6720 | 998 | "Acquired semaphore[%p|%d|%d]", handle, |
4be44fcd | 999 | units, timeout)); |
1da177e4 LT |
1000 | } |
1001 | ||
d550d98d | 1002 | return status; |
1da177e4 | 1003 | } |
1da177e4 | 1004 | |
1da177e4 LT |
1005 | /* |
1006 | * TODO: Support for units > 1? | |
1007 | */ | |
4be44fcd | 1008 | acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units) |
1da177e4 | 1009 | { |
4be44fcd | 1010 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 1011 | |
1da177e4 | 1012 | if (!sem || (units < 1)) |
d550d98d | 1013 | return AE_BAD_PARAMETER; |
1da177e4 LT |
1014 | |
1015 | if (units > 1) | |
d550d98d | 1016 | return AE_SUPPORT; |
1da177e4 | 1017 | |
4be44fcd LB |
1018 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle, |
1019 | units)); | |
1da177e4 LT |
1020 | |
1021 | up(sem); | |
1022 | ||
d550d98d | 1023 | return AE_OK; |
1da177e4 | 1024 | } |
4be44fcd | 1025 | |
1da177e4 | 1026 | #ifdef ACPI_FUTURE_USAGE |
4be44fcd | 1027 | u32 acpi_os_get_line(char *buffer) |
1da177e4 LT |
1028 | { |
1029 | ||
1030 | #ifdef ENABLE_DEBUGGER | |
1031 | if (acpi_in_debugger) { | |
1032 | u32 chars; | |
1033 | ||
1034 | kdb_read(buffer, sizeof(line_buf)); | |
1035 | ||
1036 | /* remove the CR kdb includes */ | |
1037 | chars = strlen(buffer) - 1; | |
1038 | buffer[chars] = '\0'; | |
1039 | } | |
1040 | #endif | |
1041 | ||
1042 | return 0; | |
1043 | } | |
4be44fcd | 1044 | #endif /* ACPI_FUTURE_USAGE */ |
1da177e4 | 1045 | |
4be44fcd | 1046 | acpi_status acpi_os_signal(u32 function, void *info) |
1da177e4 | 1047 | { |
4be44fcd | 1048 | switch (function) { |
1da177e4 LT |
1049 | case ACPI_SIGNAL_FATAL: |
1050 | printk(KERN_ERR PREFIX "Fatal opcode executed\n"); | |
1051 | break; | |
1052 | case ACPI_SIGNAL_BREAKPOINT: | |
1053 | /* | |
1054 | * AML Breakpoint | |
1055 | * ACPI spec. says to treat it as a NOP unless | |
1056 | * you are debugging. So if/when we integrate | |
1057 | * AML debugger into the kernel debugger its | |
1058 | * hook will go here. But until then it is | |
1059 | * not useful to print anything on breakpoints. | |
1060 | */ | |
1061 | break; | |
1062 | default: | |
1063 | break; | |
1064 | } | |
1065 | ||
1066 | return AE_OK; | |
1067 | } | |
4be44fcd | 1068 | |
4be44fcd | 1069 | static int __init acpi_os_name_setup(char *str) |
1da177e4 LT |
1070 | { |
1071 | char *p = acpi_os_name; | |
4be44fcd | 1072 | int count = ACPI_MAX_OVERRIDE_LEN - 1; |
1da177e4 LT |
1073 | |
1074 | if (!str || !*str) | |
1075 | return 0; | |
1076 | ||
1077 | for (; count-- && str && *str; str++) { | |
1078 | if (isalnum(*str) || *str == ' ' || *str == ':') | |
1079 | *p++ = *str; | |
1080 | else if (*str == '\'' || *str == '"') | |
1081 | continue; | |
1082 | else | |
1083 | break; | |
1084 | } | |
1085 | *p = 0; | |
1086 | ||
1087 | return 1; | |
4be44fcd | 1088 | |
1da177e4 LT |
1089 | } |
1090 | ||
1091 | __setup("acpi_os_name=", acpi_os_name_setup); | |
1092 | ||
12d32064 LM |
1093 | #define OSI_STRING_LENGTH_MAX 64 /* arbitrary */ |
1094 | #define OSI_STRING_ENTRIES_MAX 16 /* arbitrary */ | |
1095 | ||
1096 | struct osi_setup_entry { | |
1097 | char string[OSI_STRING_LENGTH_MAX]; | |
1098 | bool enable; | |
1099 | }; | |
1100 | ||
aa165971 SL |
1101 | static struct osi_setup_entry __initdata |
1102 | osi_setup_entries[OSI_STRING_ENTRIES_MAX] = { | |
1103 | {"Module Device", true}, | |
1104 | {"Processor Device", true}, | |
1105 | {"3.0 _SCP Extensions", true}, | |
1106 | {"Processor Aggregator Device", true}, | |
1107 | }; | |
12d32064 | 1108 | |
d90aa92c LM |
1109 | void __init acpi_osi_setup(char *str) |
1110 | { | |
12d32064 LM |
1111 | struct osi_setup_entry *osi; |
1112 | bool enable = true; | |
1113 | int i; | |
1114 | ||
d90aa92c LM |
1115 | if (!acpi_gbl_create_osi_method) |
1116 | return; | |
1117 | ||
1118 | if (str == NULL || *str == '\0') { | |
1119 | printk(KERN_INFO PREFIX "_OSI method disabled\n"); | |
1120 | acpi_gbl_create_osi_method = FALSE; | |
12d32064 LM |
1121 | return; |
1122 | } | |
1123 | ||
1124 | if (*str == '!') { | |
1125 | str++; | |
1126 | enable = false; | |
1127 | } | |
1128 | ||
1129 | for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { | |
1130 | osi = &osi_setup_entries[i]; | |
1131 | if (!strcmp(osi->string, str)) { | |
1132 | osi->enable = enable; | |
1133 | break; | |
1134 | } else if (osi->string[0] == '\0') { | |
1135 | osi->enable = enable; | |
1136 | strncpy(osi->string, str, OSI_STRING_LENGTH_MAX); | |
1137 | break; | |
1138 | } | |
1139 | } | |
d90aa92c LM |
1140 | } |
1141 | ||
d4b7dc49 LB |
1142 | static void __init set_osi_linux(unsigned int enable) |
1143 | { | |
d90aa92c | 1144 | if (osi_linux.enable != enable) |
d4b7dc49 | 1145 | osi_linux.enable = enable; |
b0ed7a91 LM |
1146 | |
1147 | if (osi_linux.enable) | |
1148 | acpi_osi_setup("Linux"); | |
1149 | else | |
1150 | acpi_osi_setup("!Linux"); | |
1151 | ||
d4b7dc49 LB |
1152 | return; |
1153 | } | |
1154 | ||
1155 | static void __init acpi_cmdline_osi_linux(unsigned int enable) | |
1156 | { | |
d90aa92c LM |
1157 | osi_linux.cmdline = 1; /* cmdline set the default and override DMI */ |
1158 | osi_linux.dmi = 0; | |
d4b7dc49 LB |
1159 | set_osi_linux(enable); |
1160 | ||
1161 | return; | |
1162 | } | |
1163 | ||
1164 | void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d) | |
1165 | { | |
d4b7dc49 LB |
1166 | printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident); |
1167 | ||
1168 | if (enable == -1) | |
1169 | return; | |
1170 | ||
d90aa92c | 1171 | osi_linux.dmi = 1; /* DMI knows that this box asks OSI(Linux) */ |
d4b7dc49 | 1172 | set_osi_linux(enable); |
f507654d | 1173 | |
f507654d LB |
1174 | return; |
1175 | } | |
1176 | ||
1da177e4 | 1177 | /* |
ae00d812 LB |
1178 | * Modify the list of "OS Interfaces" reported to BIOS via _OSI |
1179 | * | |
1da177e4 | 1180 | * empty string disables _OSI |
ae00d812 LB |
1181 | * string starting with '!' disables that string |
1182 | * otherwise string is added to list, augmenting built-in strings | |
1da177e4 | 1183 | */ |
b0ed7a91 | 1184 | static void __init acpi_osi_setup_late(void) |
1da177e4 | 1185 | { |
12d32064 LM |
1186 | struct osi_setup_entry *osi; |
1187 | char *str; | |
1188 | int i; | |
d90aa92c | 1189 | acpi_status status; |
b0ed7a91 | 1190 | |
12d32064 LM |
1191 | for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { |
1192 | osi = &osi_setup_entries[i]; | |
1193 | str = osi->string; | |
b0ed7a91 | 1194 | |
12d32064 LM |
1195 | if (*str == '\0') |
1196 | break; | |
1197 | if (osi->enable) { | |
1198 | status = acpi_install_interface(str); | |
d90aa92c | 1199 | |
12d32064 LM |
1200 | if (ACPI_SUCCESS(status)) |
1201 | printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str); | |
1202 | } else { | |
1203 | status = acpi_remove_interface(str); | |
d90aa92c | 1204 | |
12d32064 LM |
1205 | if (ACPI_SUCCESS(status)) |
1206 | printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str); | |
1207 | } | |
b0ed7a91 LM |
1208 | } |
1209 | } | |
1210 | ||
d90aa92c | 1211 | static int __init osi_setup(char *str) |
b0ed7a91 | 1212 | { |
d90aa92c LM |
1213 | if (str && !strcmp("Linux", str)) |
1214 | acpi_cmdline_osi_linux(1); | |
1215 | else if (str && !strcmp("!Linux", str)) | |
1216 | acpi_cmdline_osi_linux(0); | |
1217 | else | |
1218 | acpi_osi_setup(str); | |
1da177e4 LT |
1219 | |
1220 | return 1; | |
1221 | } | |
1222 | ||
d90aa92c | 1223 | __setup("acpi_osi=", osi_setup); |
1da177e4 LT |
1224 | |
1225 | /* enable serialization to combat AE_ALREADY_EXISTS errors */ | |
4be44fcd | 1226 | static int __init acpi_serialize_setup(char *str) |
1da177e4 LT |
1227 | { |
1228 | printk(KERN_INFO PREFIX "serialize enabled\n"); | |
1229 | ||
1230 | acpi_gbl_all_methods_serialized = TRUE; | |
1231 | ||
1232 | return 1; | |
1233 | } | |
1234 | ||
1235 | __setup("acpi_serialize", acpi_serialize_setup); | |
1236 | ||
df92e695 TR |
1237 | /* Check of resource interference between native drivers and ACPI |
1238 | * OperationRegions (SystemIO and System Memory only). | |
1239 | * IO ports and memory declared in ACPI might be used by the ACPI subsystem | |
1240 | * in arbitrary AML code and can interfere with legacy drivers. | |
1241 | * acpi_enforce_resources= can be set to: | |
1242 | * | |
7e90560c | 1243 | * - strict (default) (2) |
df92e695 | 1244 | * -> further driver trying to access the resources will not load |
7e90560c | 1245 | * - lax (1) |
df92e695 TR |
1246 | * -> further driver trying to access the resources will load, but you |
1247 | * get a system message that something might go wrong... | |
1248 | * | |
1249 | * - no (0) | |
1250 | * -> ACPI Operation Region resources will not be registered | |
1251 | * | |
1252 | */ | |
1253 | #define ENFORCE_RESOURCES_STRICT 2 | |
1254 | #define ENFORCE_RESOURCES_LAX 1 | |
1255 | #define ENFORCE_RESOURCES_NO 0 | |
1256 | ||
7e90560c | 1257 | static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; |
df92e695 TR |
1258 | |
1259 | static int __init acpi_enforce_resources_setup(char *str) | |
1260 | { | |
1261 | if (str == NULL || *str == '\0') | |
1262 | return 0; | |
1263 | ||
1264 | if (!strcmp("strict", str)) | |
1265 | acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; | |
1266 | else if (!strcmp("lax", str)) | |
1267 | acpi_enforce_resources = ENFORCE_RESOURCES_LAX; | |
1268 | else if (!strcmp("no", str)) | |
1269 | acpi_enforce_resources = ENFORCE_RESOURCES_NO; | |
1270 | ||
1271 | return 1; | |
1272 | } | |
1273 | ||
1274 | __setup("acpi_enforce_resources=", acpi_enforce_resources_setup); | |
1275 | ||
1276 | /* Check for resource conflicts between ACPI OperationRegions and native | |
1277 | * drivers */ | |
876fba43 | 1278 | int acpi_check_resource_conflict(const struct resource *res) |
df92e695 | 1279 | { |
f654c0fe LM |
1280 | acpi_adr_space_type space_id; |
1281 | acpi_size length; | |
1282 | u8 warn = 0; | |
1283 | int clash = 0; | |
df92e695 TR |
1284 | |
1285 | if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) | |
1286 | return 0; | |
1287 | if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM)) | |
1288 | return 0; | |
1289 | ||
f654c0fe LM |
1290 | if (res->flags & IORESOURCE_IO) |
1291 | space_id = ACPI_ADR_SPACE_SYSTEM_IO; | |
1292 | else | |
1293 | space_id = ACPI_ADR_SPACE_SYSTEM_MEMORY; | |
df92e695 | 1294 | |
f654c0fe LM |
1295 | length = res->end - res->start + 1; |
1296 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) | |
1297 | warn = 1; | |
1298 | clash = acpi_check_address_range(space_id, res->start, length, warn); | |
df92e695 TR |
1299 | |
1300 | if (clash) { | |
1301 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) { | |
14f03343 JD |
1302 | if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX) |
1303 | printk(KERN_NOTICE "ACPI: This conflict may" | |
1304 | " cause random problems and system" | |
1305 | " instability\n"); | |
1306 | printk(KERN_INFO "ACPI: If an ACPI driver is available" | |
1307 | " for this device, you should use it instead of" | |
1308 | " the native driver\n"); | |
df92e695 TR |
1309 | } |
1310 | if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT) | |
1311 | return -EBUSY; | |
1312 | } | |
1313 | return 0; | |
1314 | } | |
443dea72 | 1315 | EXPORT_SYMBOL(acpi_check_resource_conflict); |
df92e695 TR |
1316 | |
1317 | int acpi_check_region(resource_size_t start, resource_size_t n, | |
1318 | const char *name) | |
1319 | { | |
1320 | struct resource res = { | |
1321 | .start = start, | |
1322 | .end = start + n - 1, | |
1323 | .name = name, | |
1324 | .flags = IORESOURCE_IO, | |
1325 | }; | |
1326 | ||
1327 | return acpi_check_resource_conflict(&res); | |
1328 | } | |
1329 | EXPORT_SYMBOL(acpi_check_region); | |
1330 | ||
70dd6bea JD |
1331 | /* |
1332 | * Let drivers know whether the resource checks are effective | |
1333 | */ | |
1334 | int acpi_resources_are_enforced(void) | |
1335 | { | |
1336 | return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT; | |
1337 | } | |
1338 | EXPORT_SYMBOL(acpi_resources_are_enforced); | |
1339 | ||
9f63b88b LM |
1340 | /* |
1341 | * Deallocate the memory for a spinlock. | |
1342 | */ | |
1343 | void acpi_os_delete_lock(acpi_spinlock handle) | |
1344 | { | |
1345 | ACPI_FREE(handle); | |
1346 | } | |
1347 | ||
73459f73 RM |
1348 | /* |
1349 | * Acquire a spinlock. | |
1350 | * | |
1351 | * handle is a pointer to the spinlock_t. | |
73459f73 RM |
1352 | */ |
1353 | ||
967440e3 | 1354 | acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp) |
73459f73 | 1355 | { |
b8e4d893 | 1356 | acpi_cpu_flags flags; |
967440e3 | 1357 | spin_lock_irqsave(lockp, flags); |
73459f73 RM |
1358 | return flags; |
1359 | } | |
1360 | ||
1361 | /* | |
1362 | * Release a spinlock. See above. | |
1363 | */ | |
1364 | ||
967440e3 | 1365 | void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags) |
73459f73 | 1366 | { |
967440e3 | 1367 | spin_unlock_irqrestore(lockp, flags); |
73459f73 RM |
1368 | } |
1369 | ||
73459f73 RM |
1370 | #ifndef ACPI_USE_LOCAL_CACHE |
1371 | ||
1372 | /******************************************************************************* | |
1373 | * | |
1374 | * FUNCTION: acpi_os_create_cache | |
1375 | * | |
b229cf92 BM |
1376 | * PARAMETERS: name - Ascii name for the cache |
1377 | * size - Size of each cached object | |
1378 | * depth - Maximum depth of the cache (in objects) <ignored> | |
1379 | * cache - Where the new cache object is returned | |
73459f73 | 1380 | * |
b229cf92 | 1381 | * RETURN: status |
73459f73 RM |
1382 | * |
1383 | * DESCRIPTION: Create a cache object | |
1384 | * | |
1385 | ******************************************************************************/ | |
1386 | ||
1387 | acpi_status | |
4be44fcd | 1388 | acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache) |
73459f73 | 1389 | { |
20c2df83 | 1390 | *cache = kmem_cache_create(name, size, 0, 0, NULL); |
a6fdbf90 | 1391 | if (*cache == NULL) |
b229cf92 BM |
1392 | return AE_ERROR; |
1393 | else | |
1394 | return AE_OK; | |
73459f73 RM |
1395 | } |
1396 | ||
1397 | /******************************************************************************* | |
1398 | * | |
1399 | * FUNCTION: acpi_os_purge_cache | |
1400 | * | |
1401 | * PARAMETERS: Cache - Handle to cache object | |
1402 | * | |
1403 | * RETURN: Status | |
1404 | * | |
1405 | * DESCRIPTION: Free all objects within the requested cache. | |
1406 | * | |
1407 | ******************************************************************************/ | |
1408 | ||
4be44fcd | 1409 | acpi_status acpi_os_purge_cache(acpi_cache_t * cache) |
73459f73 | 1410 | { |
50dd0969 | 1411 | kmem_cache_shrink(cache); |
4be44fcd | 1412 | return (AE_OK); |
73459f73 RM |
1413 | } |
1414 | ||
1415 | /******************************************************************************* | |
1416 | * | |
1417 | * FUNCTION: acpi_os_delete_cache | |
1418 | * | |
1419 | * PARAMETERS: Cache - Handle to cache object | |
1420 | * | |
1421 | * RETURN: Status | |
1422 | * | |
1423 | * DESCRIPTION: Free all objects within the requested cache and delete the | |
1424 | * cache object. | |
1425 | * | |
1426 | ******************************************************************************/ | |
1427 | ||
4be44fcd | 1428 | acpi_status acpi_os_delete_cache(acpi_cache_t * cache) |
73459f73 | 1429 | { |
1a1d92c1 | 1430 | kmem_cache_destroy(cache); |
4be44fcd | 1431 | return (AE_OK); |
73459f73 RM |
1432 | } |
1433 | ||
1434 | /******************************************************************************* | |
1435 | * | |
1436 | * FUNCTION: acpi_os_release_object | |
1437 | * | |
1438 | * PARAMETERS: Cache - Handle to cache object | |
1439 | * Object - The object to be released | |
1440 | * | |
1441 | * RETURN: None | |
1442 | * | |
1443 | * DESCRIPTION: Release an object to the specified cache. If cache is full, | |
1444 | * the object is deleted. | |
1445 | * | |
1446 | ******************************************************************************/ | |
1447 | ||
4be44fcd | 1448 | acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object) |
73459f73 | 1449 | { |
4be44fcd LB |
1450 | kmem_cache_free(cache, object); |
1451 | return (AE_OK); | |
73459f73 | 1452 | } |
73459f73 | 1453 | #endif |
d362edaf MS |
1454 | |
1455 | acpi_status __init acpi_os_initialize(void) | |
1456 | { | |
1457 | acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block); | |
1458 | acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block); | |
1459 | acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block); | |
1460 | acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block); | |
1461 | ||
1462 | return AE_OK; | |
1463 | } | |
1464 | ||
32d47eef | 1465 | acpi_status __init acpi_os_initialize1(void) |
d362edaf | 1466 | { |
44d2588e TH |
1467 | kacpid_wq = alloc_workqueue("kacpid", 0, 1); |
1468 | kacpi_notify_wq = alloc_workqueue("kacpi_notify", 0, 1); | |
1469 | kacpi_hotplug_wq = alloc_workqueue("kacpi_hotplug", 0, 1); | |
d362edaf MS |
1470 | BUG_ON(!kacpid_wq); |
1471 | BUG_ON(!kacpi_notify_wq); | |
1472 | BUG_ON(!kacpi_hotplug_wq); | |
1bd64d42 LB |
1473 | acpi_install_interface_handler(acpi_osi_handler); |
1474 | acpi_osi_setup_late(); | |
d362edaf MS |
1475 | return AE_OK; |
1476 | } | |
1477 | ||
1478 | acpi_status acpi_os_terminate(void) | |
1479 | { | |
1480 | if (acpi_irq_handler) { | |
23fe3630 | 1481 | acpi_os_remove_interrupt_handler(acpi_gbl_FADT.sci_interrupt, |
d362edaf MS |
1482 | acpi_irq_handler); |
1483 | } | |
1484 | ||
1485 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe1_block); | |
1486 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block); | |
1487 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block); | |
1488 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block); | |
1489 | ||
1490 | destroy_workqueue(kacpid_wq); | |
1491 | destroy_workqueue(kacpi_notify_wq); | |
1492 | destroy_workqueue(kacpi_hotplug_wq); | |
1493 | ||
1494 | return AE_OK; | |
1495 | } |