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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 | ||
155 | return supported; | |
156 | } | |
157 | ||
bc9ffce2 | 158 | static void __init acpi_request_region (struct acpi_generic_address *gas, |
9a47cdb1 BH |
159 | unsigned int length, char *desc) |
160 | { | |
bc9ffce2 MS |
161 | u64 addr; |
162 | ||
163 | /* Handle possible alignment issues */ | |
164 | memcpy(&addr, &gas->address, sizeof(addr)); | |
165 | if (!addr || !length) | |
9a47cdb1 BH |
166 | return; |
167 | ||
cfa806f0 | 168 | /* Resources are never freed */ |
bc9ffce2 MS |
169 | if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_IO) |
170 | request_region(addr, length, desc); | |
171 | else if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) | |
172 | request_mem_region(addr, length, desc); | |
9a47cdb1 BH |
173 | } |
174 | ||
175 | static int __init acpi_reserve_resources(void) | |
176 | { | |
eee3c859 | 177 | acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
178 | "ACPI PM1a_EVT_BLK"); |
179 | ||
eee3c859 | 180 | acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
181 | "ACPI PM1b_EVT_BLK"); |
182 | ||
eee3c859 | 183 | acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
184 | "ACPI PM1a_CNT_BLK"); |
185 | ||
eee3c859 | 186 | acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
187 | "ACPI PM1b_CNT_BLK"); |
188 | ||
eee3c859 LB |
189 | if (acpi_gbl_FADT.pm_timer_length == 4) |
190 | acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR"); | |
9a47cdb1 | 191 | |
eee3c859 | 192 | acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length, |
9a47cdb1 BH |
193 | "ACPI PM2_CNT_BLK"); |
194 | ||
195 | /* Length of GPE blocks must be a non-negative multiple of 2 */ | |
196 | ||
eee3c859 LB |
197 | if (!(acpi_gbl_FADT.gpe0_block_length & 0x1)) |
198 | acpi_request_region(&acpi_gbl_FADT.xgpe0_block, | |
199 | acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK"); | |
9a47cdb1 | 200 | |
eee3c859 LB |
201 | if (!(acpi_gbl_FADT.gpe1_block_length & 0x1)) |
202 | acpi_request_region(&acpi_gbl_FADT.xgpe1_block, | |
203 | acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK"); | |
9a47cdb1 BH |
204 | |
205 | return 0; | |
206 | } | |
207 | device_initcall(acpi_reserve_resources); | |
208 | ||
4be44fcd | 209 | void acpi_os_printf(const char *fmt, ...) |
1da177e4 LT |
210 | { |
211 | va_list args; | |
212 | va_start(args, fmt); | |
213 | acpi_os_vprintf(fmt, args); | |
214 | va_end(args); | |
215 | } | |
4be44fcd | 216 | |
4be44fcd | 217 | void acpi_os_vprintf(const char *fmt, va_list args) |
1da177e4 LT |
218 | { |
219 | static char buffer[512]; | |
4be44fcd | 220 | |
1da177e4 LT |
221 | vsprintf(buffer, fmt, args); |
222 | ||
223 | #ifdef ENABLE_DEBUGGER | |
224 | if (acpi_in_debugger) { | |
225 | kdb_printf("%s", buffer); | |
226 | } else { | |
4d939155 | 227 | printk(KERN_CONT "%s", buffer); |
1da177e4 LT |
228 | } |
229 | #else | |
4d939155 | 230 | printk(KERN_CONT "%s", buffer); |
1da177e4 LT |
231 | #endif |
232 | } | |
233 | ||
4996c023 TI |
234 | #ifdef CONFIG_KEXEC |
235 | static unsigned long acpi_rsdp; | |
236 | static int __init setup_acpi_rsdp(char *arg) | |
237 | { | |
3d915894 CJ |
238 | if (kstrtoul(arg, 16, &acpi_rsdp)) |
239 | return -EINVAL; | |
4996c023 TI |
240 | return 0; |
241 | } | |
242 | early_param("acpi_rsdp", setup_acpi_rsdp); | |
243 | #endif | |
244 | ||
ad71860a | 245 | acpi_physical_address __init acpi_os_get_root_pointer(void) |
1da177e4 | 246 | { |
4996c023 TI |
247 | #ifdef CONFIG_KEXEC |
248 | if (acpi_rsdp) | |
249 | return acpi_rsdp; | |
250 | #endif | |
251 | ||
83e68189 | 252 | if (efi_enabled(EFI_CONFIG_TABLES)) { |
b2c99e3c | 253 | if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) |
ad71860a | 254 | return efi.acpi20; |
b2c99e3c | 255 | else if (efi.acpi != EFI_INVALID_TABLE_ADDR) |
ad71860a | 256 | return efi.acpi; |
1da177e4 | 257 | else { |
4be44fcd LB |
258 | printk(KERN_ERR PREFIX |
259 | "System description tables not found\n"); | |
ad71860a | 260 | return 0; |
1da177e4 | 261 | } |
8a1664be | 262 | } else if (IS_ENABLED(CONFIG_ACPI_LEGACY_TABLES_LOOKUP)) { |
239665a3 LB |
263 | acpi_physical_address pa = 0; |
264 | ||
265 | acpi_find_root_pointer(&pa); | |
266 | return pa; | |
267 | } | |
8a1664be GG |
268 | |
269 | return 0; | |
1da177e4 LT |
270 | } |
271 | ||
78cdb3ed | 272 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ |
4a3cba5e MS |
273 | static struct acpi_ioremap * |
274 | acpi_map_lookup(acpi_physical_address phys, acpi_size size) | |
620242ae MS |
275 | { |
276 | struct acpi_ioremap *map; | |
277 | ||
78cdb3ed | 278 | list_for_each_entry_rcu(map, &acpi_ioremaps, list) |
620242ae MS |
279 | if (map->phys <= phys && |
280 | phys + size <= map->phys + map->size) | |
4a3cba5e MS |
281 | return map; |
282 | ||
283 | return NULL; | |
284 | } | |
285 | ||
286 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ | |
287 | static void __iomem * | |
288 | acpi_map_vaddr_lookup(acpi_physical_address phys, unsigned int size) | |
289 | { | |
290 | struct acpi_ioremap *map; | |
291 | ||
292 | map = acpi_map_lookup(phys, size); | |
293 | if (map) | |
294 | return map->virt + (phys - map->phys); | |
620242ae MS |
295 | |
296 | return NULL; | |
297 | } | |
298 | ||
13606a2d RW |
299 | void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size) |
300 | { | |
301 | struct acpi_ioremap *map; | |
302 | void __iomem *virt = NULL; | |
303 | ||
304 | mutex_lock(&acpi_ioremap_lock); | |
305 | map = acpi_map_lookup(phys, size); | |
306 | if (map) { | |
307 | virt = map->virt + (phys - map->phys); | |
308 | map->refcount++; | |
309 | } | |
310 | mutex_unlock(&acpi_ioremap_lock); | |
311 | return virt; | |
312 | } | |
313 | EXPORT_SYMBOL_GPL(acpi_os_get_iomem); | |
314 | ||
78cdb3ed | 315 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ |
620242ae MS |
316 | static struct acpi_ioremap * |
317 | acpi_map_lookup_virt(void __iomem *virt, acpi_size size) | |
318 | { | |
319 | struct acpi_ioremap *map; | |
320 | ||
78cdb3ed | 321 | list_for_each_entry_rcu(map, &acpi_ioremaps, list) |
4a3cba5e MS |
322 | if (map->virt <= virt && |
323 | virt + size <= map->virt + map->size) | |
620242ae MS |
324 | return map; |
325 | ||
326 | return NULL; | |
327 | } | |
328 | ||
ba242d5b MS |
329 | #ifndef CONFIG_IA64 |
330 | #define should_use_kmap(pfn) page_is_ram(pfn) | |
331 | #else | |
332 | /* ioremap will take care of cache attributes */ | |
333 | #define should_use_kmap(pfn) 0 | |
334 | #endif | |
335 | ||
336 | static void __iomem *acpi_map(acpi_physical_address pg_off, unsigned long pg_sz) | |
337 | { | |
338 | unsigned long pfn; | |
339 | ||
340 | pfn = pg_off >> PAGE_SHIFT; | |
341 | if (should_use_kmap(pfn)) { | |
342 | if (pg_sz > PAGE_SIZE) | |
343 | return NULL; | |
344 | return (void __iomem __force *)kmap(pfn_to_page(pfn)); | |
345 | } else | |
346 | return acpi_os_ioremap(pg_off, pg_sz); | |
347 | } | |
348 | ||
349 | static void acpi_unmap(acpi_physical_address pg_off, void __iomem *vaddr) | |
350 | { | |
351 | unsigned long pfn; | |
352 | ||
353 | pfn = pg_off >> PAGE_SHIFT; | |
e252675f | 354 | if (should_use_kmap(pfn)) |
ba242d5b MS |
355 | kunmap(pfn_to_page(pfn)); |
356 | else | |
357 | iounmap(vaddr); | |
358 | } | |
359 | ||
2fdf0741 | 360 | void __iomem *__init_refok |
a238317c | 361 | acpi_os_map_iomem(acpi_physical_address phys, acpi_size size) |
1da177e4 | 362 | { |
7ffd0443 | 363 | struct acpi_ioremap *map; |
620242ae | 364 | void __iomem *virt; |
2d6d9fd3 RW |
365 | acpi_physical_address pg_off; |
366 | acpi_size pg_sz; | |
620242ae | 367 | |
9f4fd61f BH |
368 | if (phys > ULONG_MAX) { |
369 | printk(KERN_ERR PREFIX "Cannot map memory that high\n"); | |
70c0846e | 370 | return NULL; |
1da177e4 | 371 | } |
620242ae MS |
372 | |
373 | if (!acpi_gbl_permanent_mmap) | |
ad71860a | 374 | return __acpi_map_table((unsigned long)phys, size); |
620242ae | 375 | |
7ffd0443 RW |
376 | mutex_lock(&acpi_ioremap_lock); |
377 | /* Check if there's a suitable mapping already. */ | |
378 | map = acpi_map_lookup(phys, size); | |
379 | if (map) { | |
b7c1fadd | 380 | map->refcount++; |
7ffd0443 RW |
381 | goto out; |
382 | } | |
383 | ||
620242ae | 384 | map = kzalloc(sizeof(*map), GFP_KERNEL); |
7ffd0443 RW |
385 | if (!map) { |
386 | mutex_unlock(&acpi_ioremap_lock); | |
620242ae | 387 | return NULL; |
7ffd0443 | 388 | } |
620242ae | 389 | |
4a3cba5e MS |
390 | pg_off = round_down(phys, PAGE_SIZE); |
391 | pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off; | |
ba242d5b | 392 | virt = acpi_map(pg_off, pg_sz); |
620242ae | 393 | if (!virt) { |
7ffd0443 | 394 | mutex_unlock(&acpi_ioremap_lock); |
620242ae MS |
395 | kfree(map); |
396 | return NULL; | |
397 | } | |
398 | ||
399 | INIT_LIST_HEAD(&map->list); | |
400 | map->virt = virt; | |
4a3cba5e MS |
401 | map->phys = pg_off; |
402 | map->size = pg_sz; | |
b7c1fadd | 403 | map->refcount = 1; |
620242ae | 404 | |
78cdb3ed | 405 | list_add_tail_rcu(&map->list, &acpi_ioremaps); |
620242ae | 406 | |
a238317c | 407 | out: |
7ffd0443 | 408 | mutex_unlock(&acpi_ioremap_lock); |
4a3cba5e | 409 | return map->virt + (phys - map->phys); |
1da177e4 | 410 | } |
a238317c LZ |
411 | EXPORT_SYMBOL_GPL(acpi_os_map_iomem); |
412 | ||
413 | void *__init_refok | |
414 | acpi_os_map_memory(acpi_physical_address phys, acpi_size size) | |
415 | { | |
416 | return (void *)acpi_os_map_iomem(phys, size); | |
417 | } | |
55a82ab3 | 418 | EXPORT_SYMBOL_GPL(acpi_os_map_memory); |
1da177e4 | 419 | |
b7c1fadd | 420 | static void acpi_os_drop_map_ref(struct acpi_ioremap *map) |
4a3cba5e | 421 | { |
b7c1fadd RW |
422 | if (!--map->refcount) |
423 | list_del_rcu(&map->list); | |
4a3cba5e | 424 | } |
4a3cba5e | 425 | |
b7c1fadd | 426 | static void acpi_os_map_cleanup(struct acpi_ioremap *map) |
7fe135dc | 427 | { |
b7c1fadd RW |
428 | if (!map->refcount) { |
429 | synchronize_rcu(); | |
ba242d5b | 430 | acpi_unmap(map->phys, map->virt); |
b7c1fadd RW |
431 | kfree(map); |
432 | } | |
4a3cba5e MS |
433 | } |
434 | ||
a238317c | 435 | void __ref acpi_os_unmap_iomem(void __iomem *virt, acpi_size size) |
1da177e4 | 436 | { |
620242ae | 437 | struct acpi_ioremap *map; |
620242ae MS |
438 | |
439 | if (!acpi_gbl_permanent_mmap) { | |
7d97277b | 440 | __acpi_unmap_table(virt, size); |
620242ae MS |
441 | return; |
442 | } | |
443 | ||
7bbb8903 | 444 | mutex_lock(&acpi_ioremap_lock); |
620242ae MS |
445 | map = acpi_map_lookup_virt(virt, size); |
446 | if (!map) { | |
7bbb8903 | 447 | mutex_unlock(&acpi_ioremap_lock); |
7fe135dc | 448 | WARN(true, PREFIX "%s: bad address %p\n", __func__, virt); |
620242ae MS |
449 | return; |
450 | } | |
b7c1fadd | 451 | acpi_os_drop_map_ref(map); |
7bbb8903 | 452 | mutex_unlock(&acpi_ioremap_lock); |
620242ae | 453 | |
b7c1fadd | 454 | acpi_os_map_cleanup(map); |
1da177e4 | 455 | } |
a238317c LZ |
456 | EXPORT_SYMBOL_GPL(acpi_os_unmap_iomem); |
457 | ||
458 | void __ref acpi_os_unmap_memory(void *virt, acpi_size size) | |
459 | { | |
460 | return acpi_os_unmap_iomem((void __iomem *)virt, size); | |
461 | } | |
55a82ab3 | 462 | EXPORT_SYMBOL_GPL(acpi_os_unmap_memory); |
1da177e4 | 463 | |
0d3a9cf5 | 464 | void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size) |
7d97277b YL |
465 | { |
466 | if (!acpi_gbl_permanent_mmap) | |
467 | __acpi_unmap_table(virt, size); | |
468 | } | |
469 | ||
6f68c91c | 470 | int acpi_os_map_generic_address(struct acpi_generic_address *gas) |
29718521 | 471 | { |
bc9ffce2 | 472 | u64 addr; |
29718521 MS |
473 | void __iomem *virt; |
474 | ||
bc9ffce2 | 475 | if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) |
29718521 MS |
476 | return 0; |
477 | ||
bc9ffce2 MS |
478 | /* Handle possible alignment issues */ |
479 | memcpy(&addr, &gas->address, sizeof(addr)); | |
480 | if (!addr || !gas->bit_width) | |
29718521 MS |
481 | return -EINVAL; |
482 | ||
a238317c | 483 | virt = acpi_os_map_iomem(addr, gas->bit_width / 8); |
29718521 MS |
484 | if (!virt) |
485 | return -EIO; | |
486 | ||
487 | return 0; | |
488 | } | |
6f68c91c | 489 | EXPORT_SYMBOL(acpi_os_map_generic_address); |
29718521 | 490 | |
6f68c91c | 491 | void acpi_os_unmap_generic_address(struct acpi_generic_address *gas) |
29718521 | 492 | { |
bc9ffce2 | 493 | u64 addr; |
7fe135dc | 494 | struct acpi_ioremap *map; |
29718521 | 495 | |
bc9ffce2 | 496 | if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) |
29718521 MS |
497 | return; |
498 | ||
bc9ffce2 MS |
499 | /* Handle possible alignment issues */ |
500 | memcpy(&addr, &gas->address, sizeof(addr)); | |
501 | if (!addr || !gas->bit_width) | |
29718521 MS |
502 | return; |
503 | ||
7bbb8903 | 504 | mutex_lock(&acpi_ioremap_lock); |
bc9ffce2 | 505 | map = acpi_map_lookup(addr, gas->bit_width / 8); |
7fe135dc RW |
506 | if (!map) { |
507 | mutex_unlock(&acpi_ioremap_lock); | |
508 | return; | |
509 | } | |
b7c1fadd | 510 | acpi_os_drop_map_ref(map); |
7bbb8903 | 511 | mutex_unlock(&acpi_ioremap_lock); |
29718521 | 512 | |
b7c1fadd | 513 | acpi_os_map_cleanup(map); |
29718521 | 514 | } |
6f68c91c | 515 | EXPORT_SYMBOL(acpi_os_unmap_generic_address); |
29718521 | 516 | |
1da177e4 LT |
517 | #ifdef ACPI_FUTURE_USAGE |
518 | acpi_status | |
4be44fcd | 519 | acpi_os_get_physical_address(void *virt, acpi_physical_address * phys) |
1da177e4 | 520 | { |
4be44fcd | 521 | if (!phys || !virt) |
1da177e4 LT |
522 | return AE_BAD_PARAMETER; |
523 | ||
524 | *phys = virt_to_phys(virt); | |
525 | ||
526 | return AE_OK; | |
527 | } | |
528 | #endif | |
529 | ||
530 | #define ACPI_MAX_OVERRIDE_LEN 100 | |
531 | ||
532 | static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN]; | |
533 | ||
534 | acpi_status | |
4be44fcd LB |
535 | acpi_os_predefined_override(const struct acpi_predefined_names *init_val, |
536 | acpi_string * new_val) | |
1da177e4 LT |
537 | { |
538 | if (!init_val || !new_val) | |
539 | return AE_BAD_PARAMETER; | |
540 | ||
541 | *new_val = NULL; | |
4be44fcd | 542 | if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) { |
1da177e4 | 543 | printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n", |
4be44fcd | 544 | acpi_os_name); |
1da177e4 LT |
545 | *new_val = acpi_os_name; |
546 | } | |
547 | ||
548 | return AE_OK; | |
549 | } | |
550 | ||
53aac44c TR |
551 | #ifdef CONFIG_ACPI_INITRD_TABLE_OVERRIDE |
552 | #include <linux/earlycpio.h> | |
553 | #include <linux/memblock.h> | |
554 | ||
555 | static u64 acpi_tables_addr; | |
556 | static int all_tables_size; | |
557 | ||
558 | /* Copied from acpica/tbutils.c:acpi_tb_checksum() */ | |
66e162b3 | 559 | static u8 __init acpi_table_checksum(u8 *buffer, u32 length) |
53aac44c TR |
560 | { |
561 | u8 sum = 0; | |
562 | u8 *end = buffer + length; | |
563 | ||
564 | while (buffer < end) | |
565 | sum = (u8) (sum + *(buffer++)); | |
566 | return sum; | |
567 | } | |
568 | ||
569 | /* All but ACPI_SIG_RSDP and ACPI_SIG_FACS: */ | |
570 | static const char * const table_sigs[] = { | |
571 | ACPI_SIG_BERT, ACPI_SIG_CPEP, ACPI_SIG_ECDT, ACPI_SIG_EINJ, | |
572 | ACPI_SIG_ERST, ACPI_SIG_HEST, ACPI_SIG_MADT, ACPI_SIG_MSCT, | |
573 | ACPI_SIG_SBST, ACPI_SIG_SLIT, ACPI_SIG_SRAT, ACPI_SIG_ASF, | |
574 | ACPI_SIG_BOOT, ACPI_SIG_DBGP, ACPI_SIG_DMAR, ACPI_SIG_HPET, | |
575 | ACPI_SIG_IBFT, ACPI_SIG_IVRS, ACPI_SIG_MCFG, ACPI_SIG_MCHI, | |
576 | ACPI_SIG_SLIC, ACPI_SIG_SPCR, ACPI_SIG_SPMI, ACPI_SIG_TCPA, | |
577 | ACPI_SIG_UEFI, ACPI_SIG_WAET, ACPI_SIG_WDAT, ACPI_SIG_WDDT, | |
578 | ACPI_SIG_WDRT, ACPI_SIG_DSDT, ACPI_SIG_FADT, ACPI_SIG_PSDT, | |
579 | ACPI_SIG_RSDT, ACPI_SIG_XSDT, ACPI_SIG_SSDT, NULL }; | |
580 | ||
53aac44c TR |
581 | #define ACPI_HEADER_SIZE sizeof(struct acpi_table_header) |
582 | ||
bee7f9c8 YL |
583 | #define ACPI_OVERRIDE_TABLES 64 |
584 | static struct cpio_data __initdata acpi_initrd_files[ACPI_OVERRIDE_TABLES]; | |
585 | ||
586 | #define MAP_CHUNK_SIZE (NR_FIX_BTMAPS << PAGE_SHIFT) | |
53aac44c TR |
587 | |
588 | void __init acpi_initrd_override(void *data, size_t size) | |
589 | { | |
590 | int sig, no, table_nr = 0, total_offset = 0; | |
591 | long offset = 0; | |
592 | struct acpi_table_header *table; | |
593 | char cpio_path[32] = "kernel/firmware/acpi/"; | |
594 | struct cpio_data file; | |
53aac44c TR |
595 | |
596 | if (data == NULL || size == 0) | |
597 | return; | |
598 | ||
599 | for (no = 0; no < ACPI_OVERRIDE_TABLES; no++) { | |
600 | file = find_cpio_data(cpio_path, data, size, &offset); | |
601 | if (!file.data) | |
602 | break; | |
603 | ||
604 | data += offset; | |
605 | size -= offset; | |
606 | ||
7702ae0d TC |
607 | if (file.size < sizeof(struct acpi_table_header)) { |
608 | pr_err("ACPI OVERRIDE: Table smaller than ACPI header [%s%s]\n", | |
609 | cpio_path, file.name); | |
610 | continue; | |
611 | } | |
53aac44c TR |
612 | |
613 | table = file.data; | |
614 | ||
615 | for (sig = 0; table_sigs[sig]; sig++) | |
616 | if (!memcmp(table->signature, table_sigs[sig], 4)) | |
617 | break; | |
618 | ||
7702ae0d TC |
619 | if (!table_sigs[sig]) { |
620 | pr_err("ACPI OVERRIDE: Unknown signature [%s%s]\n", | |
621 | cpio_path, file.name); | |
622 | continue; | |
623 | } | |
624 | if (file.size != table->length) { | |
625 | pr_err("ACPI OVERRIDE: File length does not match table length [%s%s]\n", | |
626 | cpio_path, file.name); | |
627 | continue; | |
628 | } | |
629 | if (acpi_table_checksum(file.data, table->length)) { | |
630 | pr_err("ACPI OVERRIDE: Bad table checksum [%s%s]\n", | |
631 | cpio_path, file.name); | |
632 | continue; | |
633 | } | |
53aac44c TR |
634 | |
635 | pr_info("%4.4s ACPI table found in initrd [%s%s][0x%x]\n", | |
636 | table->signature, cpio_path, file.name, table->length); | |
637 | ||
638 | all_tables_size += table->length; | |
bee7f9c8 YL |
639 | acpi_initrd_files[table_nr].data = file.data; |
640 | acpi_initrd_files[table_nr].size = file.size; | |
53aac44c TR |
641 | table_nr++; |
642 | } | |
643 | if (table_nr == 0) | |
644 | return; | |
645 | ||
646 | acpi_tables_addr = | |
647 | memblock_find_in_range(0, max_low_pfn_mapped << PAGE_SHIFT, | |
648 | all_tables_size, PAGE_SIZE); | |
649 | if (!acpi_tables_addr) { | |
650 | WARN_ON(1); | |
651 | return; | |
652 | } | |
653 | /* | |
654 | * Only calling e820_add_reserve does not work and the | |
655 | * tables are invalid (memory got used) later. | |
656 | * memblock_reserve works as expected and the tables won't get modified. | |
657 | * But it's not enough on X86 because ioremap will | |
658 | * complain later (used by acpi_os_map_memory) that the pages | |
659 | * that should get mapped are not marked "reserved". | |
660 | * Both memblock_reserve and e820_add_region (via arch_reserve_mem_area) | |
661 | * works fine. | |
662 | */ | |
a6432ded | 663 | memblock_reserve(acpi_tables_addr, all_tables_size); |
53aac44c TR |
664 | arch_reserve_mem_area(acpi_tables_addr, all_tables_size); |
665 | ||
bee7f9c8 YL |
666 | /* |
667 | * early_ioremap only can remap 256k one time. If we map all | |
668 | * tables one time, we will hit the limit. Need to map chunks | |
669 | * one by one during copying the same as that in relocate_initrd(). | |
670 | */ | |
53aac44c | 671 | for (no = 0; no < table_nr; no++) { |
bee7f9c8 YL |
672 | unsigned char *src_p = acpi_initrd_files[no].data; |
673 | phys_addr_t size = acpi_initrd_files[no].size; | |
674 | phys_addr_t dest_addr = acpi_tables_addr + total_offset; | |
675 | phys_addr_t slop, clen; | |
676 | char *dest_p; | |
677 | ||
678 | total_offset += size; | |
679 | ||
680 | while (size) { | |
681 | slop = dest_addr & ~PAGE_MASK; | |
682 | clen = size; | |
683 | if (clen > MAP_CHUNK_SIZE - slop) | |
684 | clen = MAP_CHUNK_SIZE - slop; | |
685 | dest_p = early_ioremap(dest_addr & PAGE_MASK, | |
686 | clen + slop); | |
687 | memcpy(dest_p + slop, src_p, clen); | |
688 | early_iounmap(dest_p, clen + slop); | |
689 | src_p += clen; | |
690 | dest_addr += clen; | |
691 | size -= clen; | |
692 | } | |
53aac44c | 693 | } |
53aac44c TR |
694 | } |
695 | #endif /* CONFIG_ACPI_INITRD_TABLE_OVERRIDE */ | |
696 | ||
325a8d36 TR |
697 | static void acpi_table_taint(struct acpi_table_header *table) |
698 | { | |
699 | pr_warn(PREFIX | |
700 | "Override [%4.4s-%8.8s], this is unsafe: tainting kernel\n", | |
701 | table->signature, table->oem_table_id); | |
373d4d09 | 702 | add_taint(TAINT_OVERRIDDEN_ACPI_TABLE, LOCKDEP_NOW_UNRELIABLE); |
325a8d36 TR |
703 | } |
704 | ||
705 | ||
1da177e4 | 706 | acpi_status |
4be44fcd LB |
707 | acpi_os_table_override(struct acpi_table_header * existing_table, |
708 | struct acpi_table_header ** new_table) | |
1da177e4 LT |
709 | { |
710 | if (!existing_table || !new_table) | |
711 | return AE_BAD_PARAMETER; | |
712 | ||
71fc47a9 MG |
713 | *new_table = NULL; |
714 | ||
1da177e4 LT |
715 | #ifdef CONFIG_ACPI_CUSTOM_DSDT |
716 | if (strncmp(existing_table->signature, "DSDT", 4) == 0) | |
4be44fcd | 717 | *new_table = (struct acpi_table_header *)AmlCode; |
1da177e4 | 718 | #endif |
325a8d36 TR |
719 | if (*new_table != NULL) |
720 | acpi_table_taint(existing_table); | |
1da177e4 LT |
721 | return AE_OK; |
722 | } | |
723 | ||
f7b004a1 BM |
724 | acpi_status |
725 | acpi_os_physical_table_override(struct acpi_table_header *existing_table, | |
b2a35003 TR |
726 | acpi_physical_address *address, |
727 | u32 *table_length) | |
f7b004a1 | 728 | { |
b2a35003 TR |
729 | #ifndef CONFIG_ACPI_INITRD_TABLE_OVERRIDE |
730 | *table_length = 0; | |
731 | *address = 0; | |
732 | return AE_OK; | |
733 | #else | |
734 | int table_offset = 0; | |
735 | struct acpi_table_header *table; | |
736 | ||
737 | *table_length = 0; | |
738 | *address = 0; | |
739 | ||
740 | if (!acpi_tables_addr) | |
741 | return AE_OK; | |
742 | ||
743 | do { | |
744 | if (table_offset + ACPI_HEADER_SIZE > all_tables_size) { | |
745 | WARN_ON(1); | |
746 | return AE_OK; | |
747 | } | |
748 | ||
749 | table = acpi_os_map_memory(acpi_tables_addr + table_offset, | |
750 | ACPI_HEADER_SIZE); | |
f7b004a1 | 751 | |
b2a35003 TR |
752 | if (table_offset + table->length > all_tables_size) { |
753 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
754 | WARN_ON(1); | |
755 | return AE_OK; | |
756 | } | |
757 | ||
758 | table_offset += table->length; | |
759 | ||
760 | if (memcmp(existing_table->signature, table->signature, 4)) { | |
761 | acpi_os_unmap_memory(table, | |
762 | ACPI_HEADER_SIZE); | |
763 | continue; | |
764 | } | |
765 | ||
766 | /* Only override tables with matching oem id */ | |
767 | if (memcmp(table->oem_table_id, existing_table->oem_table_id, | |
768 | ACPI_OEM_TABLE_ID_SIZE)) { | |
769 | acpi_os_unmap_memory(table, | |
770 | ACPI_HEADER_SIZE); | |
771 | continue; | |
772 | } | |
773 | ||
774 | table_offset -= table->length; | |
775 | *table_length = table->length; | |
776 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
777 | *address = acpi_tables_addr + table_offset; | |
778 | break; | |
779 | } while (table_offset + ACPI_HEADER_SIZE < all_tables_size); | |
f7b004a1 | 780 | |
325a8d36 TR |
781 | if (*address != 0) |
782 | acpi_table_taint(existing_table); | |
b2a35003 TR |
783 | return AE_OK; |
784 | #endif | |
785 | } | |
f7b004a1 | 786 | |
7d12e780 | 787 | static irqreturn_t acpi_irq(int irq, void *dev_id) |
1da177e4 | 788 | { |
5229e87d LB |
789 | u32 handled; |
790 | ||
791 | handled = (*acpi_irq_handler) (acpi_irq_context); | |
792 | ||
793 | if (handled) { | |
794 | acpi_irq_handled++; | |
795 | return IRQ_HANDLED; | |
88bea188 LB |
796 | } else { |
797 | acpi_irq_not_handled++; | |
5229e87d | 798 | return IRQ_NONE; |
88bea188 | 799 | } |
1da177e4 LT |
800 | } |
801 | ||
802 | acpi_status | |
4be44fcd LB |
803 | acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler, |
804 | void *context) | |
1da177e4 LT |
805 | { |
806 | unsigned int irq; | |
807 | ||
5229e87d LB |
808 | acpi_irq_stats_init(); |
809 | ||
1da177e4 | 810 | /* |
23fe3630 RW |
811 | * ACPI interrupts different from the SCI in our copy of the FADT are |
812 | * not supported. | |
1da177e4 | 813 | */ |
23fe3630 RW |
814 | if (gsi != acpi_gbl_FADT.sci_interrupt) |
815 | return AE_BAD_PARAMETER; | |
816 | ||
817 | if (acpi_irq_handler) | |
818 | return AE_ALREADY_ACQUIRED; | |
819 | ||
1da177e4 LT |
820 | if (acpi_gsi_to_irq(gsi, &irq) < 0) { |
821 | printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n", | |
822 | gsi); | |
823 | return AE_OK; | |
824 | } | |
825 | ||
826 | acpi_irq_handler = handler; | |
827 | acpi_irq_context = context; | |
89a22dad | 828 | if (request_irq(irq, acpi_irq, IRQF_SHARED | IRQF_NO_SUSPEND, "acpi", acpi_irq)) { |
1da177e4 | 829 | printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq); |
23fe3630 | 830 | acpi_irq_handler = NULL; |
1da177e4 LT |
831 | return AE_NOT_ACQUIRED; |
832 | } | |
1da177e4 LT |
833 | |
834 | return AE_OK; | |
835 | } | |
836 | ||
4be44fcd | 837 | acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler) |
1da177e4 | 838 | { |
23fe3630 RW |
839 | if (irq != acpi_gbl_FADT.sci_interrupt) |
840 | return AE_BAD_PARAMETER; | |
841 | ||
842 | free_irq(irq, acpi_irq); | |
843 | acpi_irq_handler = NULL; | |
1da177e4 LT |
844 | |
845 | return AE_OK; | |
846 | } | |
847 | ||
848 | /* | |
849 | * Running in interpreter thread context, safe to sleep | |
850 | */ | |
851 | ||
439913ff | 852 | void acpi_os_sleep(u64 ms) |
1da177e4 | 853 | { |
30282299 | 854 | msleep(ms); |
1da177e4 | 855 | } |
4be44fcd | 856 | |
4be44fcd | 857 | void acpi_os_stall(u32 us) |
1da177e4 LT |
858 | { |
859 | while (us) { | |
860 | u32 delay = 1000; | |
861 | ||
862 | if (delay > us) | |
863 | delay = us; | |
864 | udelay(delay); | |
865 | touch_nmi_watchdog(); | |
866 | us -= delay; | |
867 | } | |
868 | } | |
4be44fcd | 869 | |
1da177e4 LT |
870 | /* |
871 | * Support ACPI 3.0 AML Timer operand | |
872 | * Returns 64-bit free-running, monotonically increasing timer | |
873 | * with 100ns granularity | |
874 | */ | |
4be44fcd | 875 | u64 acpi_os_get_timer(void) |
1da177e4 | 876 | { |
10619066 MW |
877 | u64 time_ns = ktime_to_ns(ktime_get()); |
878 | do_div(time_ns, 100); | |
879 | return time_ns; | |
1da177e4 LT |
880 | } |
881 | ||
4be44fcd | 882 | acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width) |
1da177e4 LT |
883 | { |
884 | u32 dummy; | |
885 | ||
886 | if (!value) | |
887 | value = &dummy; | |
888 | ||
49fbabf5 ZY |
889 | *value = 0; |
890 | if (width <= 8) { | |
4be44fcd | 891 | *(u8 *) value = inb(port); |
49fbabf5 | 892 | } else if (width <= 16) { |
4be44fcd | 893 | *(u16 *) value = inw(port); |
49fbabf5 | 894 | } else if (width <= 32) { |
4be44fcd | 895 | *(u32 *) value = inl(port); |
49fbabf5 | 896 | } else { |
1da177e4 LT |
897 | BUG(); |
898 | } | |
899 | ||
900 | return AE_OK; | |
901 | } | |
4be44fcd | 902 | |
1da177e4 LT |
903 | EXPORT_SYMBOL(acpi_os_read_port); |
904 | ||
4be44fcd | 905 | acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width) |
1da177e4 | 906 | { |
49fbabf5 | 907 | if (width <= 8) { |
1da177e4 | 908 | outb(value, port); |
49fbabf5 | 909 | } else if (width <= 16) { |
1da177e4 | 910 | outw(value, port); |
49fbabf5 | 911 | } else if (width <= 32) { |
1da177e4 | 912 | outl(value, port); |
49fbabf5 | 913 | } else { |
1da177e4 LT |
914 | BUG(); |
915 | } | |
916 | ||
917 | return AE_OK; | |
918 | } | |
4be44fcd | 919 | |
1da177e4 LT |
920 | EXPORT_SYMBOL(acpi_os_write_port); |
921 | ||
e615bf5b MS |
922 | #ifdef readq |
923 | static inline u64 read64(const volatile void __iomem *addr) | |
924 | { | |
925 | return readq(addr); | |
926 | } | |
927 | #else | |
928 | static inline u64 read64(const volatile void __iomem *addr) | |
929 | { | |
930 | u64 l, h; | |
931 | l = readl(addr); | |
932 | h = readl(addr+4); | |
933 | return l | (h << 32); | |
934 | } | |
935 | #endif | |
936 | ||
937 | acpi_status | |
653f4b53 | 938 | acpi_os_read_memory(acpi_physical_address phys_addr, u64 *value, u32 width) |
e615bf5b MS |
939 | { |
940 | void __iomem *virt_addr; | |
941 | unsigned int size = width / 8; | |
942 | bool unmap = false; | |
943 | u64 dummy; | |
944 | ||
945 | rcu_read_lock(); | |
946 | virt_addr = acpi_map_vaddr_lookup(phys_addr, size); | |
947 | if (!virt_addr) { | |
948 | rcu_read_unlock(); | |
949 | virt_addr = acpi_os_ioremap(phys_addr, size); | |
950 | if (!virt_addr) | |
951 | return AE_BAD_ADDRESS; | |
952 | unmap = true; | |
953 | } | |
954 | ||
955 | if (!value) | |
956 | value = &dummy; | |
957 | ||
958 | switch (width) { | |
959 | case 8: | |
960 | *(u8 *) value = readb(virt_addr); | |
961 | break; | |
962 | case 16: | |
963 | *(u16 *) value = readw(virt_addr); | |
964 | break; | |
965 | case 32: | |
966 | *(u32 *) value = readl(virt_addr); | |
967 | break; | |
968 | case 64: | |
969 | *(u64 *) value = read64(virt_addr); | |
970 | break; | |
971 | default: | |
972 | BUG(); | |
973 | } | |
974 | ||
975 | if (unmap) | |
976 | iounmap(virt_addr); | |
977 | else | |
978 | rcu_read_unlock(); | |
979 | ||
980 | return AE_OK; | |
981 | } | |
982 | ||
e615bf5b MS |
983 | #ifdef writeq |
984 | static inline void write64(u64 val, volatile void __iomem *addr) | |
985 | { | |
986 | writeq(val, addr); | |
987 | } | |
988 | #else | |
989 | static inline void write64(u64 val, volatile void __iomem *addr) | |
990 | { | |
991 | writel(val, addr); | |
992 | writel(val>>32, addr+4); | |
993 | } | |
994 | #endif | |
995 | ||
996 | acpi_status | |
653f4b53 | 997 | acpi_os_write_memory(acpi_physical_address phys_addr, u64 value, u32 width) |
e615bf5b MS |
998 | { |
999 | void __iomem *virt_addr; | |
1000 | unsigned int size = width / 8; | |
1001 | bool unmap = false; | |
1002 | ||
1003 | rcu_read_lock(); | |
1004 | virt_addr = acpi_map_vaddr_lookup(phys_addr, size); | |
1005 | if (!virt_addr) { | |
1006 | rcu_read_unlock(); | |
1007 | virt_addr = acpi_os_ioremap(phys_addr, size); | |
1008 | if (!virt_addr) | |
1009 | return AE_BAD_ADDRESS; | |
1010 | unmap = true; | |
1011 | } | |
1012 | ||
1013 | switch (width) { | |
1014 | case 8: | |
1015 | writeb(value, virt_addr); | |
1016 | break; | |
1017 | case 16: | |
1018 | writew(value, virt_addr); | |
1019 | break; | |
1020 | case 32: | |
1021 | writel(value, virt_addr); | |
1022 | break; | |
1023 | case 64: | |
1024 | write64(value, virt_addr); | |
1025 | break; | |
1026 | default: | |
1027 | BUG(); | |
1028 | } | |
1029 | ||
1030 | if (unmap) | |
1031 | iounmap(virt_addr); | |
1032 | else | |
1033 | rcu_read_unlock(); | |
1034 | ||
1035 | return AE_OK; | |
1036 | } | |
1037 | ||
1da177e4 | 1038 | acpi_status |
4be44fcd | 1039 | acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
c5f0231e | 1040 | u64 *value, u32 width) |
1da177e4 LT |
1041 | { |
1042 | int result, size; | |
c5f0231e | 1043 | u32 value32; |
1da177e4 LT |
1044 | |
1045 | if (!value) | |
1046 | return AE_BAD_PARAMETER; | |
1047 | ||
1048 | switch (width) { | |
1049 | case 8: | |
1050 | size = 1; | |
1051 | break; | |
1052 | case 16: | |
1053 | size = 2; | |
1054 | break; | |
1055 | case 32: | |
1056 | size = 4; | |
1057 | break; | |
1058 | default: | |
1059 | return AE_ERROR; | |
1060 | } | |
1061 | ||
b6ce068a MW |
1062 | result = raw_pci_read(pci_id->segment, pci_id->bus, |
1063 | PCI_DEVFN(pci_id->device, pci_id->function), | |
c5f0231e BM |
1064 | reg, size, &value32); |
1065 | *value = value32; | |
1da177e4 LT |
1066 | |
1067 | return (result ? AE_ERROR : AE_OK); | |
1068 | } | |
4be44fcd | 1069 | |
1da177e4 | 1070 | acpi_status |
4be44fcd | 1071 | acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
439913ff | 1072 | u64 value, u32 width) |
1da177e4 LT |
1073 | { |
1074 | int result, size; | |
1075 | ||
1076 | switch (width) { | |
1077 | case 8: | |
1078 | size = 1; | |
1079 | break; | |
1080 | case 16: | |
1081 | size = 2; | |
1082 | break; | |
1083 | case 32: | |
1084 | size = 4; | |
1085 | break; | |
1086 | default: | |
1087 | return AE_ERROR; | |
1088 | } | |
1089 | ||
b6ce068a MW |
1090 | result = raw_pci_write(pci_id->segment, pci_id->bus, |
1091 | PCI_DEVFN(pci_id->device, pci_id->function), | |
1092 | reg, size, value); | |
1da177e4 LT |
1093 | |
1094 | return (result ? AE_ERROR : AE_OK); | |
1095 | } | |
1096 | ||
65f27f38 | 1097 | static void acpi_os_execute_deferred(struct work_struct *work) |
88db5e14 AS |
1098 | { |
1099 | struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work); | |
88db5e14 | 1100 | |
19cd847a ZR |
1101 | dpc->function(dpc->context); |
1102 | kfree(dpc); | |
19cd847a ZR |
1103 | } |
1104 | ||
b8d35192 AS |
1105 | /******************************************************************************* |
1106 | * | |
1107 | * FUNCTION: acpi_os_execute | |
1108 | * | |
1109 | * PARAMETERS: Type - Type of the callback | |
1110 | * Function - Function to be executed | |
1111 | * Context - Function parameters | |
1112 | * | |
1113 | * RETURN: Status | |
1114 | * | |
1115 | * DESCRIPTION: Depending on type, either queues function for deferred execution or | |
1116 | * immediately executes function on a separate thread. | |
1117 | * | |
1118 | ******************************************************************************/ | |
1119 | ||
7b98118a RW |
1120 | acpi_status acpi_os_execute(acpi_execute_type type, |
1121 | acpi_osd_exec_callback function, void *context) | |
1da177e4 | 1122 | { |
4be44fcd LB |
1123 | acpi_status status = AE_OK; |
1124 | struct acpi_os_dpc *dpc; | |
17bc54ee | 1125 | struct workqueue_struct *queue; |
19cd847a | 1126 | int ret; |
72945b2b LB |
1127 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
1128 | "Scheduling function [%p(%p)] for deferred execution.\n", | |
1129 | function, context)); | |
1da177e4 | 1130 | |
1da177e4 LT |
1131 | /* |
1132 | * Allocate/initialize DPC structure. Note that this memory will be | |
65f27f38 | 1133 | * freed by the callee. The kernel handles the work_struct list in a |
1da177e4 LT |
1134 | * way that allows us to also free its memory inside the callee. |
1135 | * Because we may want to schedule several tasks with different | |
1136 | * parameters we can't use the approach some kernel code uses of | |
65f27f38 | 1137 | * having a static work_struct. |
1da177e4 | 1138 | */ |
72945b2b | 1139 | |
3ae45a27 | 1140 | dpc = kzalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC); |
1da177e4 | 1141 | if (!dpc) |
889c78be | 1142 | return AE_NO_MEMORY; |
b976fe19 | 1143 | |
1da177e4 LT |
1144 | dpc->function = function; |
1145 | dpc->context = context; | |
b976fe19 | 1146 | |
c02256be | 1147 | /* |
3ae45a27 RW |
1148 | * To prevent lockdep from complaining unnecessarily, make sure that |
1149 | * there is a different static lockdep key for each workqueue by using | |
1150 | * INIT_WORK() for each of them separately. | |
c02256be | 1151 | */ |
7b98118a | 1152 | if (type == OSL_NOTIFY_HANDLER) { |
3ae45a27 | 1153 | queue = kacpi_notify_wq; |
bc73675b | 1154 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); |
3ae45a27 RW |
1155 | } else { |
1156 | queue = kacpid_wq; | |
bc73675b | 1157 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); |
3ae45a27 | 1158 | } |
bc73675b | 1159 | |
8fec62b2 TH |
1160 | /* |
1161 | * On some machines, a software-initiated SMI causes corruption unless | |
1162 | * the SMI runs on CPU 0. An SMI can be initiated by any AML, but | |
1163 | * typically it's done in GPE-related methods that are run via | |
1164 | * workqueues, so we can avoid the known corruption cases by always | |
1165 | * queueing on CPU 0. | |
1166 | */ | |
1167 | ret = queue_work_on(0, queue, &dpc->work); | |
19cd847a ZR |
1168 | |
1169 | if (!ret) { | |
55ac9a01 LM |
1170 | printk(KERN_ERR PREFIX |
1171 | "Call to queue_work() failed.\n"); | |
17bc54ee AS |
1172 | status = AE_ERROR; |
1173 | kfree(dpc); | |
1da177e4 | 1174 | } |
889c78be | 1175 | return status; |
1da177e4 | 1176 | } |
7b98118a | 1177 | EXPORT_SYMBOL(acpi_os_execute); |
4be44fcd | 1178 | |
7b98118a | 1179 | void acpi_os_wait_events_complete(void) |
19cd847a | 1180 | { |
7b98118a RW |
1181 | flush_workqueue(kacpid_wq); |
1182 | flush_workqueue(kacpi_notify_wq); | |
19cd847a | 1183 | } |
1da177e4 | 1184 | |
7b98118a RW |
1185 | struct acpi_hp_work { |
1186 | struct work_struct work; | |
1e3bcb59 | 1187 | struct acpi_device *adev; |
7b98118a RW |
1188 | u32 src; |
1189 | }; | |
1190 | ||
1191 | static void acpi_hotplug_work_fn(struct work_struct *work) | |
19cd847a | 1192 | { |
7b98118a RW |
1193 | struct acpi_hp_work *hpw = container_of(work, struct acpi_hp_work, work); |
1194 | ||
1195 | acpi_os_wait_events_complete(); | |
1e3bcb59 | 1196 | acpi_device_hotplug(hpw->adev, hpw->src); |
7b98118a | 1197 | kfree(hpw); |
19cd847a ZR |
1198 | } |
1199 | ||
1e3bcb59 | 1200 | acpi_status acpi_hotplug_schedule(struct acpi_device *adev, u32 src) |
1da177e4 | 1201 | { |
7b98118a RW |
1202 | struct acpi_hp_work *hpw; |
1203 | ||
1204 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, | |
1e3bcb59 RW |
1205 | "Scheduling hotplug event (%p, %u) for deferred execution.\n", |
1206 | adev, src)); | |
7b98118a RW |
1207 | |
1208 | hpw = kmalloc(sizeof(*hpw), GFP_KERNEL); | |
1209 | if (!hpw) | |
1210 | return AE_NO_MEMORY; | |
1211 | ||
1212 | INIT_WORK(&hpw->work, acpi_hotplug_work_fn); | |
1e3bcb59 | 1213 | hpw->adev = adev; |
7b98118a RW |
1214 | hpw->src = src; |
1215 | /* | |
1216 | * We can't run hotplug code in kacpid_wq/kacpid_notify_wq etc., because | |
1217 | * the hotplug code may call driver .remove() functions, which may | |
1218 | * invoke flush_scheduled_work()/acpi_os_wait_events_complete() to flush | |
1219 | * these workqueues. | |
1220 | */ | |
1221 | if (!queue_work(kacpi_hotplug_wq, &hpw->work)) { | |
1222 | kfree(hpw); | |
1223 | return AE_ERROR; | |
1224 | } | |
1225 | return AE_OK; | |
1da177e4 | 1226 | } |
4be44fcd | 1227 | |
d783156e RW |
1228 | bool acpi_queue_hotplug_work(struct work_struct *work) |
1229 | { | |
1230 | return queue_work(kacpi_hotplug_wq, work); | |
1231 | } | |
1da177e4 | 1232 | |
1da177e4 | 1233 | acpi_status |
4be44fcd | 1234 | acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle) |
1da177e4 | 1235 | { |
4be44fcd | 1236 | struct semaphore *sem = NULL; |
1da177e4 | 1237 | |
2d0acb4a | 1238 | sem = acpi_os_allocate_zeroed(sizeof(struct semaphore)); |
1da177e4 | 1239 | if (!sem) |
d550d98d | 1240 | return AE_NO_MEMORY; |
1da177e4 LT |
1241 | |
1242 | sema_init(sem, initial_units); | |
1243 | ||
4be44fcd | 1244 | *handle = (acpi_handle *) sem; |
1da177e4 | 1245 | |
4be44fcd LB |
1246 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n", |
1247 | *handle, initial_units)); | |
1da177e4 | 1248 | |
d550d98d | 1249 | return AE_OK; |
1da177e4 | 1250 | } |
1da177e4 | 1251 | |
1da177e4 LT |
1252 | /* |
1253 | * TODO: A better way to delete semaphores? Linux doesn't have a | |
1254 | * 'delete_semaphore()' function -- may result in an invalid | |
1255 | * pointer dereference for non-synchronized consumers. Should | |
1256 | * we at least check for blocked threads and signal/cancel them? | |
1257 | */ | |
1258 | ||
4be44fcd | 1259 | acpi_status acpi_os_delete_semaphore(acpi_handle handle) |
1da177e4 | 1260 | { |
4be44fcd | 1261 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 1262 | |
1da177e4 | 1263 | if (!sem) |
d550d98d | 1264 | return AE_BAD_PARAMETER; |
1da177e4 | 1265 | |
4be44fcd | 1266 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle)); |
1da177e4 | 1267 | |
f1241c87 | 1268 | BUG_ON(!list_empty(&sem->wait_list)); |
02438d87 | 1269 | kfree(sem); |
4be44fcd | 1270 | sem = NULL; |
1da177e4 | 1271 | |
d550d98d | 1272 | return AE_OK; |
1da177e4 | 1273 | } |
1da177e4 | 1274 | |
1da177e4 | 1275 | /* |
1da177e4 LT |
1276 | * TODO: Support for units > 1? |
1277 | */ | |
4be44fcd | 1278 | acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout) |
1da177e4 | 1279 | { |
4be44fcd LB |
1280 | acpi_status status = AE_OK; |
1281 | struct semaphore *sem = (struct semaphore *)handle; | |
f1241c87 | 1282 | long jiffies; |
4be44fcd | 1283 | int ret = 0; |
1da177e4 | 1284 | |
1da177e4 | 1285 | if (!sem || (units < 1)) |
d550d98d | 1286 | return AE_BAD_PARAMETER; |
1da177e4 LT |
1287 | |
1288 | if (units > 1) | |
d550d98d | 1289 | return AE_SUPPORT; |
1da177e4 | 1290 | |
4be44fcd LB |
1291 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n", |
1292 | handle, units, timeout)); | |
1da177e4 | 1293 | |
f1241c87 MW |
1294 | if (timeout == ACPI_WAIT_FOREVER) |
1295 | jiffies = MAX_SCHEDULE_TIMEOUT; | |
1296 | else | |
1297 | jiffies = msecs_to_jiffies(timeout); | |
cad1525a | 1298 | |
f1241c87 MW |
1299 | ret = down_timeout(sem, jiffies); |
1300 | if (ret) | |
1301 | status = AE_TIME; | |
1da177e4 LT |
1302 | |
1303 | if (ACPI_FAILURE(status)) { | |
9e7e2c04 | 1304 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, |
a6fc6720 | 1305 | "Failed to acquire semaphore[%p|%d|%d], %s", |
4be44fcd LB |
1306 | handle, units, timeout, |
1307 | acpi_format_exception(status))); | |
1308 | } else { | |
1309 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, | |
a6fc6720 | 1310 | "Acquired semaphore[%p|%d|%d]", handle, |
4be44fcd | 1311 | units, timeout)); |
1da177e4 LT |
1312 | } |
1313 | ||
d550d98d | 1314 | return status; |
1da177e4 | 1315 | } |
1da177e4 | 1316 | |
1da177e4 LT |
1317 | /* |
1318 | * TODO: Support for units > 1? | |
1319 | */ | |
4be44fcd | 1320 | acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units) |
1da177e4 | 1321 | { |
4be44fcd | 1322 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 1323 | |
1da177e4 | 1324 | if (!sem || (units < 1)) |
d550d98d | 1325 | return AE_BAD_PARAMETER; |
1da177e4 LT |
1326 | |
1327 | if (units > 1) | |
d550d98d | 1328 | return AE_SUPPORT; |
1da177e4 | 1329 | |
4be44fcd LB |
1330 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle, |
1331 | units)); | |
1da177e4 LT |
1332 | |
1333 | up(sem); | |
1334 | ||
d550d98d | 1335 | return AE_OK; |
1da177e4 | 1336 | } |
4be44fcd | 1337 | |
1da177e4 | 1338 | #ifdef ACPI_FUTURE_USAGE |
4be44fcd | 1339 | u32 acpi_os_get_line(char *buffer) |
1da177e4 LT |
1340 | { |
1341 | ||
1342 | #ifdef ENABLE_DEBUGGER | |
1343 | if (acpi_in_debugger) { | |
1344 | u32 chars; | |
1345 | ||
1346 | kdb_read(buffer, sizeof(line_buf)); | |
1347 | ||
1348 | /* remove the CR kdb includes */ | |
1349 | chars = strlen(buffer) - 1; | |
1350 | buffer[chars] = '\0'; | |
1351 | } | |
1352 | #endif | |
1353 | ||
1354 | return 0; | |
1355 | } | |
4be44fcd | 1356 | #endif /* ACPI_FUTURE_USAGE */ |
1da177e4 | 1357 | |
4be44fcd | 1358 | acpi_status acpi_os_signal(u32 function, void *info) |
1da177e4 | 1359 | { |
4be44fcd | 1360 | switch (function) { |
1da177e4 LT |
1361 | case ACPI_SIGNAL_FATAL: |
1362 | printk(KERN_ERR PREFIX "Fatal opcode executed\n"); | |
1363 | break; | |
1364 | case ACPI_SIGNAL_BREAKPOINT: | |
1365 | /* | |
1366 | * AML Breakpoint | |
1367 | * ACPI spec. says to treat it as a NOP unless | |
1368 | * you are debugging. So if/when we integrate | |
1369 | * AML debugger into the kernel debugger its | |
1370 | * hook will go here. But until then it is | |
1371 | * not useful to print anything on breakpoints. | |
1372 | */ | |
1373 | break; | |
1374 | default: | |
1375 | break; | |
1376 | } | |
1377 | ||
1378 | return AE_OK; | |
1379 | } | |
4be44fcd | 1380 | |
4be44fcd | 1381 | static int __init acpi_os_name_setup(char *str) |
1da177e4 LT |
1382 | { |
1383 | char *p = acpi_os_name; | |
4be44fcd | 1384 | int count = ACPI_MAX_OVERRIDE_LEN - 1; |
1da177e4 LT |
1385 | |
1386 | if (!str || !*str) | |
1387 | return 0; | |
1388 | ||
5e2be4e0 | 1389 | for (; count-- && *str; str++) { |
1da177e4 LT |
1390 | if (isalnum(*str) || *str == ' ' || *str == ':') |
1391 | *p++ = *str; | |
1392 | else if (*str == '\'' || *str == '"') | |
1393 | continue; | |
1394 | else | |
1395 | break; | |
1396 | } | |
1397 | *p = 0; | |
1398 | ||
1399 | return 1; | |
4be44fcd | 1400 | |
1da177e4 LT |
1401 | } |
1402 | ||
1403 | __setup("acpi_os_name=", acpi_os_name_setup); | |
1404 | ||
12d32064 LM |
1405 | #define OSI_STRING_LENGTH_MAX 64 /* arbitrary */ |
1406 | #define OSI_STRING_ENTRIES_MAX 16 /* arbitrary */ | |
1407 | ||
1408 | struct osi_setup_entry { | |
1409 | char string[OSI_STRING_LENGTH_MAX]; | |
1410 | bool enable; | |
1411 | }; | |
1412 | ||
e73d3136 HG |
1413 | static struct osi_setup_entry |
1414 | osi_setup_entries[OSI_STRING_ENTRIES_MAX] __initdata = { | |
aa165971 SL |
1415 | {"Module Device", true}, |
1416 | {"Processor Device", true}, | |
1417 | {"3.0 _SCP Extensions", true}, | |
1418 | {"Processor Aggregator Device", true}, | |
1419 | }; | |
12d32064 | 1420 | |
d90aa92c LM |
1421 | void __init acpi_osi_setup(char *str) |
1422 | { | |
12d32064 LM |
1423 | struct osi_setup_entry *osi; |
1424 | bool enable = true; | |
1425 | int i; | |
1426 | ||
d90aa92c LM |
1427 | if (!acpi_gbl_create_osi_method) |
1428 | return; | |
1429 | ||
1430 | if (str == NULL || *str == '\0') { | |
1431 | printk(KERN_INFO PREFIX "_OSI method disabled\n"); | |
1432 | acpi_gbl_create_osi_method = FALSE; | |
12d32064 LM |
1433 | return; |
1434 | } | |
1435 | ||
1436 | if (*str == '!') { | |
1437 | str++; | |
5dc17986 LZ |
1438 | if (*str == '\0') { |
1439 | osi_linux.default_disabling = 1; | |
1440 | return; | |
741d8128 LZ |
1441 | } else if (*str == '*') { |
1442 | acpi_update_interfaces(ACPI_DISABLE_ALL_STRINGS); | |
1443 | for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { | |
1444 | osi = &osi_setup_entries[i]; | |
1445 | osi->enable = false; | |
1446 | } | |
1447 | return; | |
5dc17986 | 1448 | } |
12d32064 LM |
1449 | enable = false; |
1450 | } | |
1451 | ||
1452 | for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { | |
1453 | osi = &osi_setup_entries[i]; | |
1454 | if (!strcmp(osi->string, str)) { | |
1455 | osi->enable = enable; | |
1456 | break; | |
1457 | } else if (osi->string[0] == '\0') { | |
1458 | osi->enable = enable; | |
1459 | strncpy(osi->string, str, OSI_STRING_LENGTH_MAX); | |
1460 | break; | |
1461 | } | |
1462 | } | |
d90aa92c LM |
1463 | } |
1464 | ||
d4b7dc49 LB |
1465 | static void __init set_osi_linux(unsigned int enable) |
1466 | { | |
d90aa92c | 1467 | if (osi_linux.enable != enable) |
d4b7dc49 | 1468 | osi_linux.enable = enable; |
b0ed7a91 LM |
1469 | |
1470 | if (osi_linux.enable) | |
1471 | acpi_osi_setup("Linux"); | |
1472 | else | |
1473 | acpi_osi_setup("!Linux"); | |
1474 | ||
d4b7dc49 LB |
1475 | return; |
1476 | } | |
1477 | ||
1478 | static void __init acpi_cmdline_osi_linux(unsigned int enable) | |
1479 | { | |
d90aa92c LM |
1480 | osi_linux.cmdline = 1; /* cmdline set the default and override DMI */ |
1481 | osi_linux.dmi = 0; | |
d4b7dc49 LB |
1482 | set_osi_linux(enable); |
1483 | ||
1484 | return; | |
1485 | } | |
1486 | ||
1487 | void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d) | |
1488 | { | |
d4b7dc49 LB |
1489 | printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident); |
1490 | ||
1491 | if (enable == -1) | |
1492 | return; | |
1493 | ||
d90aa92c | 1494 | osi_linux.dmi = 1; /* DMI knows that this box asks OSI(Linux) */ |
d4b7dc49 | 1495 | set_osi_linux(enable); |
f507654d | 1496 | |
f507654d LB |
1497 | return; |
1498 | } | |
1499 | ||
1da177e4 | 1500 | /* |
ae00d812 LB |
1501 | * Modify the list of "OS Interfaces" reported to BIOS via _OSI |
1502 | * | |
1da177e4 | 1503 | * empty string disables _OSI |
ae00d812 LB |
1504 | * string starting with '!' disables that string |
1505 | * otherwise string is added to list, augmenting built-in strings | |
1da177e4 | 1506 | */ |
b0ed7a91 | 1507 | static void __init acpi_osi_setup_late(void) |
1da177e4 | 1508 | { |
12d32064 LM |
1509 | struct osi_setup_entry *osi; |
1510 | char *str; | |
1511 | int i; | |
d90aa92c | 1512 | acpi_status status; |
b0ed7a91 | 1513 | |
5dc17986 LZ |
1514 | if (osi_linux.default_disabling) { |
1515 | status = acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS); | |
1516 | ||
1517 | if (ACPI_SUCCESS(status)) | |
1518 | printk(KERN_INFO PREFIX "Disabled all _OSI OS vendors\n"); | |
1519 | } | |
1520 | ||
12d32064 LM |
1521 | for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { |
1522 | osi = &osi_setup_entries[i]; | |
1523 | str = osi->string; | |
b0ed7a91 | 1524 | |
12d32064 LM |
1525 | if (*str == '\0') |
1526 | break; | |
1527 | if (osi->enable) { | |
1528 | status = acpi_install_interface(str); | |
d90aa92c | 1529 | |
12d32064 LM |
1530 | if (ACPI_SUCCESS(status)) |
1531 | printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str); | |
1532 | } else { | |
1533 | status = acpi_remove_interface(str); | |
d90aa92c | 1534 | |
12d32064 LM |
1535 | if (ACPI_SUCCESS(status)) |
1536 | printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str); | |
1537 | } | |
b0ed7a91 LM |
1538 | } |
1539 | } | |
1540 | ||
d90aa92c | 1541 | static int __init osi_setup(char *str) |
b0ed7a91 | 1542 | { |
d90aa92c LM |
1543 | if (str && !strcmp("Linux", str)) |
1544 | acpi_cmdline_osi_linux(1); | |
1545 | else if (str && !strcmp("!Linux", str)) | |
1546 | acpi_cmdline_osi_linux(0); | |
1547 | else | |
1548 | acpi_osi_setup(str); | |
1da177e4 LT |
1549 | |
1550 | return 1; | |
1551 | } | |
1552 | ||
d90aa92c | 1553 | __setup("acpi_osi=", osi_setup); |
1da177e4 | 1554 | |
22b5afce | 1555 | /* |
08e1d7c0 | 1556 | * Disable the auto-serialization of named objects creation methods. |
22b5afce | 1557 | * |
08e1d7c0 | 1558 | * This feature is enabled by default. It marks the AML control methods |
22b5afce BM |
1559 | * that contain the opcodes to create named objects as "Serialized". |
1560 | */ | |
08e1d7c0 | 1561 | static int __init acpi_no_auto_serialize_setup(char *str) |
1da177e4 | 1562 | { |
08e1d7c0 LZ |
1563 | acpi_gbl_auto_serialize_methods = FALSE; |
1564 | pr_info("ACPI: auto-serialization disabled\n"); | |
1da177e4 LT |
1565 | |
1566 | return 1; | |
1567 | } | |
1568 | ||
08e1d7c0 | 1569 | __setup("acpi_no_auto_serialize", acpi_no_auto_serialize_setup); |
1da177e4 | 1570 | |
df92e695 TR |
1571 | /* Check of resource interference between native drivers and ACPI |
1572 | * OperationRegions (SystemIO and System Memory only). | |
1573 | * IO ports and memory declared in ACPI might be used by the ACPI subsystem | |
1574 | * in arbitrary AML code and can interfere with legacy drivers. | |
1575 | * acpi_enforce_resources= can be set to: | |
1576 | * | |
7e90560c | 1577 | * - strict (default) (2) |
df92e695 | 1578 | * -> further driver trying to access the resources will not load |
7e90560c | 1579 | * - lax (1) |
df92e695 TR |
1580 | * -> further driver trying to access the resources will load, but you |
1581 | * get a system message that something might go wrong... | |
1582 | * | |
1583 | * - no (0) | |
1584 | * -> ACPI Operation Region resources will not be registered | |
1585 | * | |
1586 | */ | |
1587 | #define ENFORCE_RESOURCES_STRICT 2 | |
1588 | #define ENFORCE_RESOURCES_LAX 1 | |
1589 | #define ENFORCE_RESOURCES_NO 0 | |
1590 | ||
7e90560c | 1591 | static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; |
df92e695 TR |
1592 | |
1593 | static int __init acpi_enforce_resources_setup(char *str) | |
1594 | { | |
1595 | if (str == NULL || *str == '\0') | |
1596 | return 0; | |
1597 | ||
1598 | if (!strcmp("strict", str)) | |
1599 | acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; | |
1600 | else if (!strcmp("lax", str)) | |
1601 | acpi_enforce_resources = ENFORCE_RESOURCES_LAX; | |
1602 | else if (!strcmp("no", str)) | |
1603 | acpi_enforce_resources = ENFORCE_RESOURCES_NO; | |
1604 | ||
1605 | return 1; | |
1606 | } | |
1607 | ||
1608 | __setup("acpi_enforce_resources=", acpi_enforce_resources_setup); | |
1609 | ||
1610 | /* Check for resource conflicts between ACPI OperationRegions and native | |
1611 | * drivers */ | |
876fba43 | 1612 | int acpi_check_resource_conflict(const struct resource *res) |
df92e695 | 1613 | { |
f654c0fe LM |
1614 | acpi_adr_space_type space_id; |
1615 | acpi_size length; | |
1616 | u8 warn = 0; | |
1617 | int clash = 0; | |
df92e695 TR |
1618 | |
1619 | if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) | |
1620 | return 0; | |
1621 | if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM)) | |
1622 | return 0; | |
1623 | ||
f654c0fe LM |
1624 | if (res->flags & IORESOURCE_IO) |
1625 | space_id = ACPI_ADR_SPACE_SYSTEM_IO; | |
1626 | else | |
1627 | space_id = ACPI_ADR_SPACE_SYSTEM_MEMORY; | |
df92e695 | 1628 | |
e4f52244 | 1629 | length = resource_size(res); |
f654c0fe LM |
1630 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) |
1631 | warn = 1; | |
1632 | clash = acpi_check_address_range(space_id, res->start, length, warn); | |
df92e695 TR |
1633 | |
1634 | if (clash) { | |
1635 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) { | |
14f03343 JD |
1636 | if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX) |
1637 | printk(KERN_NOTICE "ACPI: This conflict may" | |
1638 | " cause random problems and system" | |
1639 | " instability\n"); | |
1640 | printk(KERN_INFO "ACPI: If an ACPI driver is available" | |
1641 | " for this device, you should use it instead of" | |
1642 | " the native driver\n"); | |
df92e695 TR |
1643 | } |
1644 | if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT) | |
1645 | return -EBUSY; | |
1646 | } | |
1647 | return 0; | |
1648 | } | |
443dea72 | 1649 | EXPORT_SYMBOL(acpi_check_resource_conflict); |
df92e695 TR |
1650 | |
1651 | int acpi_check_region(resource_size_t start, resource_size_t n, | |
1652 | const char *name) | |
1653 | { | |
1654 | struct resource res = { | |
1655 | .start = start, | |
1656 | .end = start + n - 1, | |
1657 | .name = name, | |
1658 | .flags = IORESOURCE_IO, | |
1659 | }; | |
1660 | ||
1661 | return acpi_check_resource_conflict(&res); | |
1662 | } | |
1663 | EXPORT_SYMBOL(acpi_check_region); | |
1664 | ||
70dd6bea JD |
1665 | /* |
1666 | * Let drivers know whether the resource checks are effective | |
1667 | */ | |
1668 | int acpi_resources_are_enforced(void) | |
1669 | { | |
1670 | return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT; | |
1671 | } | |
1672 | EXPORT_SYMBOL(acpi_resources_are_enforced); | |
1673 | ||
9f63b88b LM |
1674 | /* |
1675 | * Deallocate the memory for a spinlock. | |
1676 | */ | |
1677 | void acpi_os_delete_lock(acpi_spinlock handle) | |
1678 | { | |
1679 | ACPI_FREE(handle); | |
1680 | } | |
1681 | ||
73459f73 RM |
1682 | /* |
1683 | * Acquire a spinlock. | |
1684 | * | |
1685 | * handle is a pointer to the spinlock_t. | |
73459f73 RM |
1686 | */ |
1687 | ||
967440e3 | 1688 | acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp) |
73459f73 | 1689 | { |
b8e4d893 | 1690 | acpi_cpu_flags flags; |
967440e3 | 1691 | spin_lock_irqsave(lockp, flags); |
73459f73 RM |
1692 | return flags; |
1693 | } | |
1694 | ||
1695 | /* | |
1696 | * Release a spinlock. See above. | |
1697 | */ | |
1698 | ||
967440e3 | 1699 | void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags) |
73459f73 | 1700 | { |
967440e3 | 1701 | spin_unlock_irqrestore(lockp, flags); |
73459f73 RM |
1702 | } |
1703 | ||
73459f73 RM |
1704 | #ifndef ACPI_USE_LOCAL_CACHE |
1705 | ||
1706 | /******************************************************************************* | |
1707 | * | |
1708 | * FUNCTION: acpi_os_create_cache | |
1709 | * | |
b229cf92 BM |
1710 | * PARAMETERS: name - Ascii name for the cache |
1711 | * size - Size of each cached object | |
1712 | * depth - Maximum depth of the cache (in objects) <ignored> | |
1713 | * cache - Where the new cache object is returned | |
73459f73 | 1714 | * |
b229cf92 | 1715 | * RETURN: status |
73459f73 RM |
1716 | * |
1717 | * DESCRIPTION: Create a cache object | |
1718 | * | |
1719 | ******************************************************************************/ | |
1720 | ||
1721 | acpi_status | |
4be44fcd | 1722 | acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache) |
73459f73 | 1723 | { |
20c2df83 | 1724 | *cache = kmem_cache_create(name, size, 0, 0, NULL); |
a6fdbf90 | 1725 | if (*cache == NULL) |
b229cf92 BM |
1726 | return AE_ERROR; |
1727 | else | |
1728 | return AE_OK; | |
73459f73 RM |
1729 | } |
1730 | ||
1731 | /******************************************************************************* | |
1732 | * | |
1733 | * FUNCTION: acpi_os_purge_cache | |
1734 | * | |
1735 | * PARAMETERS: Cache - Handle to cache object | |
1736 | * | |
1737 | * RETURN: Status | |
1738 | * | |
1739 | * DESCRIPTION: Free all objects within the requested cache. | |
1740 | * | |
1741 | ******************************************************************************/ | |
1742 | ||
4be44fcd | 1743 | acpi_status acpi_os_purge_cache(acpi_cache_t * cache) |
73459f73 | 1744 | { |
50dd0969 | 1745 | kmem_cache_shrink(cache); |
4be44fcd | 1746 | return (AE_OK); |
73459f73 RM |
1747 | } |
1748 | ||
1749 | /******************************************************************************* | |
1750 | * | |
1751 | * FUNCTION: acpi_os_delete_cache | |
1752 | * | |
1753 | * PARAMETERS: Cache - Handle to cache object | |
1754 | * | |
1755 | * RETURN: Status | |
1756 | * | |
1757 | * DESCRIPTION: Free all objects within the requested cache and delete the | |
1758 | * cache object. | |
1759 | * | |
1760 | ******************************************************************************/ | |
1761 | ||
4be44fcd | 1762 | acpi_status acpi_os_delete_cache(acpi_cache_t * cache) |
73459f73 | 1763 | { |
1a1d92c1 | 1764 | kmem_cache_destroy(cache); |
4be44fcd | 1765 | return (AE_OK); |
73459f73 RM |
1766 | } |
1767 | ||
1768 | /******************************************************************************* | |
1769 | * | |
1770 | * FUNCTION: acpi_os_release_object | |
1771 | * | |
1772 | * PARAMETERS: Cache - Handle to cache object | |
1773 | * Object - The object to be released | |
1774 | * | |
1775 | * RETURN: None | |
1776 | * | |
1777 | * DESCRIPTION: Release an object to the specified cache. If cache is full, | |
1778 | * the object is deleted. | |
1779 | * | |
1780 | ******************************************************************************/ | |
1781 | ||
4be44fcd | 1782 | acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object) |
73459f73 | 1783 | { |
4be44fcd LB |
1784 | kmem_cache_free(cache, object); |
1785 | return (AE_OK); | |
73459f73 | 1786 | } |
73459f73 | 1787 | #endif |
d362edaf | 1788 | |
a94e88cd | 1789 | static int __init acpi_no_static_ssdt_setup(char *s) |
b75dd297 | 1790 | { |
a94e88cd LZ |
1791 | acpi_gbl_disable_ssdt_table_install = TRUE; |
1792 | pr_info("ACPI: static SSDT installation disabled\n"); | |
b75dd297 | 1793 | |
a94e88cd | 1794 | return 0; |
b75dd297 LZ |
1795 | } |
1796 | ||
a94e88cd | 1797 | early_param("acpi_no_static_ssdt", acpi_no_static_ssdt_setup); |
b75dd297 | 1798 | |
4dde507f LZ |
1799 | static int __init acpi_disable_return_repair(char *s) |
1800 | { | |
1801 | printk(KERN_NOTICE PREFIX | |
1802 | "ACPI: Predefined validation mechanism disabled\n"); | |
1803 | acpi_gbl_disable_auto_repair = TRUE; | |
1804 | ||
1805 | return 1; | |
1806 | } | |
1807 | ||
1808 | __setup("acpica_no_return_repair", acpi_disable_return_repair); | |
1809 | ||
d362edaf MS |
1810 | acpi_status __init acpi_os_initialize(void) |
1811 | { | |
1812 | acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block); | |
1813 | acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block); | |
1814 | acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block); | |
1815 | acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block); | |
a4714a89 RW |
1816 | if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) { |
1817 | /* | |
1818 | * Use acpi_os_map_generic_address to pre-map the reset | |
1819 | * register if it's in system memory. | |
1820 | */ | |
1821 | int rv; | |
1822 | ||
1823 | rv = acpi_os_map_generic_address(&acpi_gbl_FADT.reset_register); | |
1824 | pr_debug(PREFIX "%s: map reset_reg status %d\n", __func__, rv); | |
1825 | } | |
d362edaf MS |
1826 | |
1827 | return AE_OK; | |
1828 | } | |
1829 | ||
32d47eef | 1830 | acpi_status __init acpi_os_initialize1(void) |
d362edaf | 1831 | { |
44d2588e TH |
1832 | kacpid_wq = alloc_workqueue("kacpid", 0, 1); |
1833 | kacpi_notify_wq = alloc_workqueue("kacpi_notify", 0, 1); | |
d783156e | 1834 | kacpi_hotplug_wq = alloc_ordered_workqueue("kacpi_hotplug", 0); |
d362edaf MS |
1835 | BUG_ON(!kacpid_wq); |
1836 | BUG_ON(!kacpi_notify_wq); | |
1837 | BUG_ON(!kacpi_hotplug_wq); | |
1bd64d42 LB |
1838 | acpi_install_interface_handler(acpi_osi_handler); |
1839 | acpi_osi_setup_late(); | |
d362edaf MS |
1840 | return AE_OK; |
1841 | } | |
1842 | ||
1843 | acpi_status acpi_os_terminate(void) | |
1844 | { | |
1845 | if (acpi_irq_handler) { | |
23fe3630 | 1846 | acpi_os_remove_interrupt_handler(acpi_gbl_FADT.sci_interrupt, |
d362edaf MS |
1847 | acpi_irq_handler); |
1848 | } | |
1849 | ||
1850 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe1_block); | |
1851 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block); | |
1852 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block); | |
1853 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block); | |
a4714a89 RW |
1854 | if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) |
1855 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.reset_register); | |
d362edaf MS |
1856 | |
1857 | destroy_workqueue(kacpid_wq); | |
1858 | destroy_workqueue(kacpi_notify_wq); | |
1859 | destroy_workqueue(kacpi_hotplug_wq); | |
1860 | ||
1861 | return AE_OK; | |
1862 | } | |
09f98a82 TL |
1863 | |
1864 | acpi_status acpi_os_prepare_sleep(u8 sleep_state, u32 pm1a_control, | |
1865 | u32 pm1b_control) | |
1866 | { | |
1867 | int rc = 0; | |
1868 | if (__acpi_os_prepare_sleep) | |
1869 | rc = __acpi_os_prepare_sleep(sleep_state, | |
1870 | pm1a_control, pm1b_control); | |
1871 | if (rc < 0) | |
1872 | return AE_ERROR; | |
1873 | else if (rc > 0) | |
1874 | return AE_CTRL_SKIP; | |
1875 | ||
1876 | return AE_OK; | |
1877 | } | |
1878 | ||
1879 | void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state, | |
1880 | u32 pm1a_ctrl, u32 pm1b_ctrl)) | |
1881 | { | |
1882 | __acpi_os_prepare_sleep = func; | |
1883 | } | |
92d8aff3 | 1884 | |
d6b47b12 BG |
1885 | acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state, u32 val_a, |
1886 | u32 val_b) | |
1887 | { | |
1888 | int rc = 0; | |
1889 | if (__acpi_os_prepare_extended_sleep) | |
1890 | rc = __acpi_os_prepare_extended_sleep(sleep_state, | |
1891 | val_a, val_b); | |
1892 | if (rc < 0) | |
1893 | return AE_ERROR; | |
1894 | else if (rc > 0) | |
1895 | return AE_CTRL_SKIP; | |
1896 | ||
1897 | return AE_OK; | |
1898 | } | |
1899 | ||
1900 | void acpi_os_set_prepare_extended_sleep(int (*func)(u8 sleep_state, | |
1901 | u32 val_a, u32 val_b)) | |
1902 | { | |
1903 | __acpi_os_prepare_extended_sleep = func; | |
1904 | } |