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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> |
2d6d9fd3 | 42 | #include <linux/acpi_io.h> |
1da177e4 | 43 | #include <linux/efi.h> |
df92e695 TR |
44 | #include <linux/ioport.h> |
45 | #include <linux/list.h> | |
f1241c87 MW |
46 | #include <linux/jiffies.h> |
47 | #include <linux/semaphore.h> | |
48 | ||
49 | #include <asm/io.h> | |
50 | #include <asm/uaccess.h> | |
51 | ||
52 | #include <acpi/acpi.h> | |
53 | #include <acpi/acpi_bus.h> | |
54 | #include <acpi/processor.h> | |
1129c92f | 55 | #include "internal.h" |
1da177e4 | 56 | |
1da177e4 | 57 | #define _COMPONENT ACPI_OS_SERVICES |
f52fd66d | 58 | ACPI_MODULE_NAME("osl"); |
1da177e4 | 59 | #define PREFIX "ACPI: " |
4be44fcd LB |
60 | struct acpi_os_dpc { |
61 | acpi_osd_exec_callback function; | |
62 | void *context; | |
65f27f38 | 63 | struct work_struct work; |
9ac61856 | 64 | int wait; |
1da177e4 LT |
65 | }; |
66 | ||
67 | #ifdef CONFIG_ACPI_CUSTOM_DSDT | |
68 | #include CONFIG_ACPI_CUSTOM_DSDT_FILE | |
69 | #endif | |
70 | ||
71 | #ifdef ENABLE_DEBUGGER | |
72 | #include <linux/kdb.h> | |
73 | ||
74 | /* stuff for debugger support */ | |
75 | int acpi_in_debugger; | |
76 | EXPORT_SYMBOL(acpi_in_debugger); | |
77 | ||
78 | extern char line_buf[80]; | |
4be44fcd | 79 | #endif /*ENABLE_DEBUGGER */ |
1da177e4 | 80 | |
09f98a82 TL |
81 | static int (*__acpi_os_prepare_sleep)(u8 sleep_state, u32 pm1a_ctrl, |
82 | u32 pm1b_ctrl); | |
d6b47b12 BG |
83 | static int (*__acpi_os_prepare_extended_sleep)(u8 sleep_state, u32 val_a, |
84 | u32 val_b); | |
09f98a82 | 85 | |
1da177e4 LT |
86 | static acpi_osd_handler acpi_irq_handler; |
87 | static void *acpi_irq_context; | |
88 | static struct workqueue_struct *kacpid_wq; | |
88db5e14 | 89 | static struct workqueue_struct *kacpi_notify_wq; |
92d8aff3 | 90 | static struct workqueue_struct *kacpi_hotplug_wq; |
1da177e4 | 91 | |
620242ae MS |
92 | /* |
93 | * This list of permanent mappings is for memory that may be accessed from | |
94 | * interrupt context, where we can't do the ioremap(). | |
95 | */ | |
96 | struct acpi_ioremap { | |
97 | struct list_head list; | |
98 | void __iomem *virt; | |
99 | acpi_physical_address phys; | |
100 | acpi_size size; | |
b7c1fadd | 101 | unsigned long refcount; |
620242ae MS |
102 | }; |
103 | ||
104 | static LIST_HEAD(acpi_ioremaps); | |
7bbb8903 | 105 | static DEFINE_MUTEX(acpi_ioremap_lock); |
620242ae | 106 | |
b0ed7a91 | 107 | static void __init acpi_osi_setup_late(void); |
ae00d812 | 108 | |
d4b7dc49 | 109 | /* |
a6e0887f | 110 | * The story of _OSI(Linux) |
d4b7dc49 | 111 | * |
a6e0887f LB |
112 | * From pre-history through Linux-2.6.22, |
113 | * Linux responded TRUE upon a BIOS OSI(Linux) query. | |
d4b7dc49 | 114 | * |
a6e0887f LB |
115 | * Unfortunately, reference BIOS writers got wind of this |
116 | * and put OSI(Linux) in their example code, quickly exposing | |
117 | * this string as ill-conceived and opening the door to | |
118 | * an un-bounded number of BIOS incompatibilities. | |
d4b7dc49 | 119 | * |
a6e0887f LB |
120 | * For example, OSI(Linux) was used on resume to re-POST a |
121 | * video card on one system, because Linux at that time | |
122 | * could not do a speedy restore in its native driver. | |
123 | * But then upon gaining quick native restore capability, | |
124 | * Linux has no way to tell the BIOS to skip the time-consuming | |
125 | * POST -- putting Linux at a permanent performance disadvantage. | |
126 | * On another system, the BIOS writer used OSI(Linux) | |
127 | * to infer native OS support for IPMI! On other systems, | |
128 | * OSI(Linux) simply got in the way of Linux claiming to | |
129 | * be compatible with other operating systems, exposing | |
130 | * BIOS issues such as skipped device initialization. | |
d4b7dc49 | 131 | * |
a6e0887f LB |
132 | * So "Linux" turned out to be a really poor chose of |
133 | * OSI string, and from Linux-2.6.23 onward we respond FALSE. | |
d4b7dc49 LB |
134 | * |
135 | * BIOS writers should NOT query _OSI(Linux) on future systems. | |
a6e0887f LB |
136 | * Linux will complain on the console when it sees it, and return FALSE. |
137 | * To get Linux to return TRUE for your system will require | |
138 | * a kernel source update to add a DMI entry, | |
139 | * or boot with "acpi_osi=Linux" | |
d4b7dc49 | 140 | */ |
d4b7dc49 | 141 | |
1d15d84e | 142 | static struct osi_linux { |
d4b7dc49 LB |
143 | unsigned int enable:1; |
144 | unsigned int dmi:1; | |
145 | unsigned int cmdline:1; | |
5dc17986 LZ |
146 | unsigned int default_disabling:1; |
147 | } osi_linux = {0, 0, 0, 0}; | |
f507654d | 148 | |
b0ed7a91 LM |
149 | static u32 acpi_osi_handler(acpi_string interface, u32 supported) |
150 | { | |
151 | if (!strcmp("Linux", interface)) { | |
152 | ||
8997621b | 153 | printk_once(KERN_NOTICE FW_BUG PREFIX |
b0ed7a91 LM |
154 | "BIOS _OSI(Linux) query %s%s\n", |
155 | osi_linux.enable ? "honored" : "ignored", | |
156 | osi_linux.cmdline ? " via cmdline" : | |
157 | osi_linux.dmi ? " via DMI" : ""); | |
158 | } | |
159 | ||
160 | return supported; | |
161 | } | |
162 | ||
bc9ffce2 | 163 | static void __init acpi_request_region (struct acpi_generic_address *gas, |
9a47cdb1 BH |
164 | unsigned int length, char *desc) |
165 | { | |
bc9ffce2 MS |
166 | u64 addr; |
167 | ||
168 | /* Handle possible alignment issues */ | |
169 | memcpy(&addr, &gas->address, sizeof(addr)); | |
170 | if (!addr || !length) | |
9a47cdb1 BH |
171 | return; |
172 | ||
cfa806f0 | 173 | /* Resources are never freed */ |
bc9ffce2 MS |
174 | if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_IO) |
175 | request_region(addr, length, desc); | |
176 | else if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) | |
177 | request_mem_region(addr, length, desc); | |
9a47cdb1 BH |
178 | } |
179 | ||
180 | static int __init acpi_reserve_resources(void) | |
181 | { | |
eee3c859 | 182 | acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
183 | "ACPI PM1a_EVT_BLK"); |
184 | ||
eee3c859 | 185 | acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
186 | "ACPI PM1b_EVT_BLK"); |
187 | ||
eee3c859 | 188 | acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
189 | "ACPI PM1a_CNT_BLK"); |
190 | ||
eee3c859 | 191 | acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
192 | "ACPI PM1b_CNT_BLK"); |
193 | ||
eee3c859 LB |
194 | if (acpi_gbl_FADT.pm_timer_length == 4) |
195 | acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR"); | |
9a47cdb1 | 196 | |
eee3c859 | 197 | acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length, |
9a47cdb1 BH |
198 | "ACPI PM2_CNT_BLK"); |
199 | ||
200 | /* Length of GPE blocks must be a non-negative multiple of 2 */ | |
201 | ||
eee3c859 LB |
202 | if (!(acpi_gbl_FADT.gpe0_block_length & 0x1)) |
203 | acpi_request_region(&acpi_gbl_FADT.xgpe0_block, | |
204 | acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK"); | |
9a47cdb1 | 205 | |
eee3c859 LB |
206 | if (!(acpi_gbl_FADT.gpe1_block_length & 0x1)) |
207 | acpi_request_region(&acpi_gbl_FADT.xgpe1_block, | |
208 | acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK"); | |
9a47cdb1 BH |
209 | |
210 | return 0; | |
211 | } | |
212 | device_initcall(acpi_reserve_resources); | |
213 | ||
4be44fcd | 214 | void acpi_os_printf(const char *fmt, ...) |
1da177e4 LT |
215 | { |
216 | va_list args; | |
217 | va_start(args, fmt); | |
218 | acpi_os_vprintf(fmt, args); | |
219 | va_end(args); | |
220 | } | |
4be44fcd | 221 | |
4be44fcd | 222 | void acpi_os_vprintf(const char *fmt, va_list args) |
1da177e4 LT |
223 | { |
224 | static char buffer[512]; | |
4be44fcd | 225 | |
1da177e4 LT |
226 | vsprintf(buffer, fmt, args); |
227 | ||
228 | #ifdef ENABLE_DEBUGGER | |
229 | if (acpi_in_debugger) { | |
230 | kdb_printf("%s", buffer); | |
231 | } else { | |
4d939155 | 232 | printk(KERN_CONT "%s", buffer); |
1da177e4 LT |
233 | } |
234 | #else | |
4d939155 | 235 | printk(KERN_CONT "%s", buffer); |
1da177e4 LT |
236 | #endif |
237 | } | |
238 | ||
4996c023 TI |
239 | #ifdef CONFIG_KEXEC |
240 | static unsigned long acpi_rsdp; | |
241 | static int __init setup_acpi_rsdp(char *arg) | |
242 | { | |
243 | acpi_rsdp = simple_strtoul(arg, NULL, 16); | |
244 | return 0; | |
245 | } | |
246 | early_param("acpi_rsdp", setup_acpi_rsdp); | |
247 | #endif | |
248 | ||
ad71860a | 249 | acpi_physical_address __init acpi_os_get_root_pointer(void) |
1da177e4 | 250 | { |
4996c023 TI |
251 | #ifdef CONFIG_KEXEC |
252 | if (acpi_rsdp) | |
253 | return acpi_rsdp; | |
254 | #endif | |
255 | ||
83e68189 | 256 | if (efi_enabled(EFI_CONFIG_TABLES)) { |
b2c99e3c | 257 | if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) |
ad71860a | 258 | return efi.acpi20; |
b2c99e3c | 259 | else if (efi.acpi != EFI_INVALID_TABLE_ADDR) |
ad71860a | 260 | return efi.acpi; |
1da177e4 | 261 | else { |
4be44fcd LB |
262 | printk(KERN_ERR PREFIX |
263 | "System description tables not found\n"); | |
ad71860a | 264 | return 0; |
1da177e4 | 265 | } |
239665a3 LB |
266 | } else { |
267 | acpi_physical_address pa = 0; | |
268 | ||
269 | acpi_find_root_pointer(&pa); | |
270 | return pa; | |
271 | } | |
1da177e4 LT |
272 | } |
273 | ||
78cdb3ed | 274 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ |
4a3cba5e MS |
275 | static struct acpi_ioremap * |
276 | acpi_map_lookup(acpi_physical_address phys, acpi_size size) | |
620242ae MS |
277 | { |
278 | struct acpi_ioremap *map; | |
279 | ||
78cdb3ed | 280 | list_for_each_entry_rcu(map, &acpi_ioremaps, list) |
620242ae MS |
281 | if (map->phys <= phys && |
282 | phys + size <= map->phys + map->size) | |
4a3cba5e MS |
283 | return map; |
284 | ||
285 | return NULL; | |
286 | } | |
287 | ||
288 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ | |
289 | static void __iomem * | |
290 | acpi_map_vaddr_lookup(acpi_physical_address phys, unsigned int size) | |
291 | { | |
292 | struct acpi_ioremap *map; | |
293 | ||
294 | map = acpi_map_lookup(phys, size); | |
295 | if (map) | |
296 | return map->virt + (phys - map->phys); | |
620242ae MS |
297 | |
298 | return NULL; | |
299 | } | |
300 | ||
13606a2d RW |
301 | void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size) |
302 | { | |
303 | struct acpi_ioremap *map; | |
304 | void __iomem *virt = NULL; | |
305 | ||
306 | mutex_lock(&acpi_ioremap_lock); | |
307 | map = acpi_map_lookup(phys, size); | |
308 | if (map) { | |
309 | virt = map->virt + (phys - map->phys); | |
310 | map->refcount++; | |
311 | } | |
312 | mutex_unlock(&acpi_ioremap_lock); | |
313 | return virt; | |
314 | } | |
315 | EXPORT_SYMBOL_GPL(acpi_os_get_iomem); | |
316 | ||
78cdb3ed | 317 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ |
620242ae MS |
318 | static struct acpi_ioremap * |
319 | acpi_map_lookup_virt(void __iomem *virt, acpi_size size) | |
320 | { | |
321 | struct acpi_ioremap *map; | |
322 | ||
78cdb3ed | 323 | list_for_each_entry_rcu(map, &acpi_ioremaps, list) |
4a3cba5e MS |
324 | if (map->virt <= virt && |
325 | virt + size <= map->virt + map->size) | |
620242ae MS |
326 | return map; |
327 | ||
328 | return NULL; | |
329 | } | |
330 | ||
ba242d5b MS |
331 | #ifndef CONFIG_IA64 |
332 | #define should_use_kmap(pfn) page_is_ram(pfn) | |
333 | #else | |
334 | /* ioremap will take care of cache attributes */ | |
335 | #define should_use_kmap(pfn) 0 | |
336 | #endif | |
337 | ||
338 | static void __iomem *acpi_map(acpi_physical_address pg_off, unsigned long pg_sz) | |
339 | { | |
340 | unsigned long pfn; | |
341 | ||
342 | pfn = pg_off >> PAGE_SHIFT; | |
343 | if (should_use_kmap(pfn)) { | |
344 | if (pg_sz > PAGE_SIZE) | |
345 | return NULL; | |
346 | return (void __iomem __force *)kmap(pfn_to_page(pfn)); | |
347 | } else | |
348 | return acpi_os_ioremap(pg_off, pg_sz); | |
349 | } | |
350 | ||
351 | static void acpi_unmap(acpi_physical_address pg_off, void __iomem *vaddr) | |
352 | { | |
353 | unsigned long pfn; | |
354 | ||
355 | pfn = pg_off >> PAGE_SHIFT; | |
e252675f | 356 | if (should_use_kmap(pfn)) |
ba242d5b MS |
357 | kunmap(pfn_to_page(pfn)); |
358 | else | |
359 | iounmap(vaddr); | |
360 | } | |
361 | ||
2fdf0741 JB |
362 | void __iomem *__init_refok |
363 | acpi_os_map_memory(acpi_physical_address phys, acpi_size size) | |
1da177e4 | 364 | { |
7ffd0443 | 365 | struct acpi_ioremap *map; |
620242ae | 366 | void __iomem *virt; |
2d6d9fd3 RW |
367 | acpi_physical_address pg_off; |
368 | acpi_size pg_sz; | |
620242ae | 369 | |
9f4fd61f BH |
370 | if (phys > ULONG_MAX) { |
371 | printk(KERN_ERR PREFIX "Cannot map memory that high\n"); | |
70c0846e | 372 | return NULL; |
1da177e4 | 373 | } |
620242ae MS |
374 | |
375 | if (!acpi_gbl_permanent_mmap) | |
ad71860a | 376 | return __acpi_map_table((unsigned long)phys, size); |
620242ae | 377 | |
7ffd0443 RW |
378 | mutex_lock(&acpi_ioremap_lock); |
379 | /* Check if there's a suitable mapping already. */ | |
380 | map = acpi_map_lookup(phys, size); | |
381 | if (map) { | |
b7c1fadd | 382 | map->refcount++; |
7ffd0443 RW |
383 | goto out; |
384 | } | |
385 | ||
620242ae | 386 | map = kzalloc(sizeof(*map), GFP_KERNEL); |
7ffd0443 RW |
387 | if (!map) { |
388 | mutex_unlock(&acpi_ioremap_lock); | |
620242ae | 389 | return NULL; |
7ffd0443 | 390 | } |
620242ae | 391 | |
4a3cba5e MS |
392 | pg_off = round_down(phys, PAGE_SIZE); |
393 | pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off; | |
ba242d5b | 394 | virt = acpi_map(pg_off, pg_sz); |
620242ae | 395 | if (!virt) { |
7ffd0443 | 396 | mutex_unlock(&acpi_ioremap_lock); |
620242ae MS |
397 | kfree(map); |
398 | return NULL; | |
399 | } | |
400 | ||
401 | INIT_LIST_HEAD(&map->list); | |
402 | map->virt = virt; | |
4a3cba5e MS |
403 | map->phys = pg_off; |
404 | map->size = pg_sz; | |
b7c1fadd | 405 | map->refcount = 1; |
620242ae | 406 | |
78cdb3ed | 407 | list_add_tail_rcu(&map->list, &acpi_ioremaps); |
620242ae | 408 | |
7ffd0443 RW |
409 | out: |
410 | mutex_unlock(&acpi_ioremap_lock); | |
4a3cba5e | 411 | return map->virt + (phys - map->phys); |
1da177e4 | 412 | } |
55a82ab3 | 413 | EXPORT_SYMBOL_GPL(acpi_os_map_memory); |
1da177e4 | 414 | |
b7c1fadd | 415 | static void acpi_os_drop_map_ref(struct acpi_ioremap *map) |
4a3cba5e | 416 | { |
b7c1fadd RW |
417 | if (!--map->refcount) |
418 | list_del_rcu(&map->list); | |
4a3cba5e | 419 | } |
4a3cba5e | 420 | |
b7c1fadd | 421 | static void acpi_os_map_cleanup(struct acpi_ioremap *map) |
7fe135dc | 422 | { |
b7c1fadd RW |
423 | if (!map->refcount) { |
424 | synchronize_rcu(); | |
ba242d5b | 425 | acpi_unmap(map->phys, map->virt); |
b7c1fadd RW |
426 | kfree(map); |
427 | } | |
4a3cba5e MS |
428 | } |
429 | ||
0d3a9cf5 | 430 | void __ref acpi_os_unmap_memory(void __iomem *virt, acpi_size size) |
1da177e4 | 431 | { |
620242ae | 432 | struct acpi_ioremap *map; |
620242ae MS |
433 | |
434 | if (!acpi_gbl_permanent_mmap) { | |
7d97277b | 435 | __acpi_unmap_table(virt, size); |
620242ae MS |
436 | return; |
437 | } | |
438 | ||
7bbb8903 | 439 | mutex_lock(&acpi_ioremap_lock); |
620242ae MS |
440 | map = acpi_map_lookup_virt(virt, size); |
441 | if (!map) { | |
7bbb8903 | 442 | mutex_unlock(&acpi_ioremap_lock); |
7fe135dc | 443 | WARN(true, PREFIX "%s: bad address %p\n", __func__, virt); |
620242ae MS |
444 | return; |
445 | } | |
b7c1fadd | 446 | acpi_os_drop_map_ref(map); |
7bbb8903 | 447 | mutex_unlock(&acpi_ioremap_lock); |
620242ae | 448 | |
b7c1fadd | 449 | acpi_os_map_cleanup(map); |
1da177e4 | 450 | } |
55a82ab3 | 451 | EXPORT_SYMBOL_GPL(acpi_os_unmap_memory); |
1da177e4 | 452 | |
0d3a9cf5 | 453 | void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size) |
7d97277b YL |
454 | { |
455 | if (!acpi_gbl_permanent_mmap) | |
456 | __acpi_unmap_table(virt, size); | |
457 | } | |
458 | ||
6f68c91c | 459 | int acpi_os_map_generic_address(struct acpi_generic_address *gas) |
29718521 | 460 | { |
bc9ffce2 | 461 | u64 addr; |
29718521 MS |
462 | void __iomem *virt; |
463 | ||
bc9ffce2 | 464 | if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) |
29718521 MS |
465 | return 0; |
466 | ||
bc9ffce2 MS |
467 | /* Handle possible alignment issues */ |
468 | memcpy(&addr, &gas->address, sizeof(addr)); | |
469 | if (!addr || !gas->bit_width) | |
29718521 MS |
470 | return -EINVAL; |
471 | ||
bc9ffce2 | 472 | virt = acpi_os_map_memory(addr, gas->bit_width / 8); |
29718521 MS |
473 | if (!virt) |
474 | return -EIO; | |
475 | ||
476 | return 0; | |
477 | } | |
6f68c91c | 478 | EXPORT_SYMBOL(acpi_os_map_generic_address); |
29718521 | 479 | |
6f68c91c | 480 | void acpi_os_unmap_generic_address(struct acpi_generic_address *gas) |
29718521 | 481 | { |
bc9ffce2 | 482 | u64 addr; |
7fe135dc | 483 | struct acpi_ioremap *map; |
29718521 | 484 | |
bc9ffce2 | 485 | if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) |
29718521 MS |
486 | return; |
487 | ||
bc9ffce2 MS |
488 | /* Handle possible alignment issues */ |
489 | memcpy(&addr, &gas->address, sizeof(addr)); | |
490 | if (!addr || !gas->bit_width) | |
29718521 MS |
491 | return; |
492 | ||
7bbb8903 | 493 | mutex_lock(&acpi_ioremap_lock); |
bc9ffce2 | 494 | map = acpi_map_lookup(addr, gas->bit_width / 8); |
7fe135dc RW |
495 | if (!map) { |
496 | mutex_unlock(&acpi_ioremap_lock); | |
497 | return; | |
498 | } | |
b7c1fadd | 499 | acpi_os_drop_map_ref(map); |
7bbb8903 | 500 | mutex_unlock(&acpi_ioremap_lock); |
29718521 | 501 | |
b7c1fadd | 502 | acpi_os_map_cleanup(map); |
29718521 | 503 | } |
6f68c91c | 504 | EXPORT_SYMBOL(acpi_os_unmap_generic_address); |
29718521 | 505 | |
1da177e4 LT |
506 | #ifdef ACPI_FUTURE_USAGE |
507 | acpi_status | |
4be44fcd | 508 | acpi_os_get_physical_address(void *virt, acpi_physical_address * phys) |
1da177e4 | 509 | { |
4be44fcd | 510 | if (!phys || !virt) |
1da177e4 LT |
511 | return AE_BAD_PARAMETER; |
512 | ||
513 | *phys = virt_to_phys(virt); | |
514 | ||
515 | return AE_OK; | |
516 | } | |
517 | #endif | |
518 | ||
519 | #define ACPI_MAX_OVERRIDE_LEN 100 | |
520 | ||
521 | static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN]; | |
522 | ||
523 | acpi_status | |
4be44fcd LB |
524 | acpi_os_predefined_override(const struct acpi_predefined_names *init_val, |
525 | acpi_string * new_val) | |
1da177e4 LT |
526 | { |
527 | if (!init_val || !new_val) | |
528 | return AE_BAD_PARAMETER; | |
529 | ||
530 | *new_val = NULL; | |
4be44fcd | 531 | if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) { |
1da177e4 | 532 | printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n", |
4be44fcd | 533 | acpi_os_name); |
1da177e4 LT |
534 | *new_val = acpi_os_name; |
535 | } | |
536 | ||
537 | return AE_OK; | |
538 | } | |
539 | ||
53aac44c TR |
540 | #ifdef CONFIG_ACPI_INITRD_TABLE_OVERRIDE |
541 | #include <linux/earlycpio.h> | |
542 | #include <linux/memblock.h> | |
543 | ||
544 | static u64 acpi_tables_addr; | |
545 | static int all_tables_size; | |
546 | ||
547 | /* Copied from acpica/tbutils.c:acpi_tb_checksum() */ | |
548 | u8 __init acpi_table_checksum(u8 *buffer, u32 length) | |
549 | { | |
550 | u8 sum = 0; | |
551 | u8 *end = buffer + length; | |
552 | ||
553 | while (buffer < end) | |
554 | sum = (u8) (sum + *(buffer++)); | |
555 | return sum; | |
556 | } | |
557 | ||
558 | /* All but ACPI_SIG_RSDP and ACPI_SIG_FACS: */ | |
559 | static const char * const table_sigs[] = { | |
560 | ACPI_SIG_BERT, ACPI_SIG_CPEP, ACPI_SIG_ECDT, ACPI_SIG_EINJ, | |
561 | ACPI_SIG_ERST, ACPI_SIG_HEST, ACPI_SIG_MADT, ACPI_SIG_MSCT, | |
562 | ACPI_SIG_SBST, ACPI_SIG_SLIT, ACPI_SIG_SRAT, ACPI_SIG_ASF, | |
563 | ACPI_SIG_BOOT, ACPI_SIG_DBGP, ACPI_SIG_DMAR, ACPI_SIG_HPET, | |
564 | ACPI_SIG_IBFT, ACPI_SIG_IVRS, ACPI_SIG_MCFG, ACPI_SIG_MCHI, | |
565 | ACPI_SIG_SLIC, ACPI_SIG_SPCR, ACPI_SIG_SPMI, ACPI_SIG_TCPA, | |
566 | ACPI_SIG_UEFI, ACPI_SIG_WAET, ACPI_SIG_WDAT, ACPI_SIG_WDDT, | |
567 | ACPI_SIG_WDRT, ACPI_SIG_DSDT, ACPI_SIG_FADT, ACPI_SIG_PSDT, | |
568 | ACPI_SIG_RSDT, ACPI_SIG_XSDT, ACPI_SIG_SSDT, NULL }; | |
569 | ||
53aac44c TR |
570 | #define ACPI_HEADER_SIZE sizeof(struct acpi_table_header) |
571 | ||
572 | /* Must not increase 10 or needs code modification below */ | |
573 | #define ACPI_OVERRIDE_TABLES 10 | |
574 | ||
575 | void __init acpi_initrd_override(void *data, size_t size) | |
576 | { | |
577 | int sig, no, table_nr = 0, total_offset = 0; | |
578 | long offset = 0; | |
579 | struct acpi_table_header *table; | |
580 | char cpio_path[32] = "kernel/firmware/acpi/"; | |
581 | struct cpio_data file; | |
582 | struct cpio_data early_initrd_files[ACPI_OVERRIDE_TABLES]; | |
583 | char *p; | |
584 | ||
585 | if (data == NULL || size == 0) | |
586 | return; | |
587 | ||
588 | for (no = 0; no < ACPI_OVERRIDE_TABLES; no++) { | |
589 | file = find_cpio_data(cpio_path, data, size, &offset); | |
590 | if (!file.data) | |
591 | break; | |
592 | ||
593 | data += offset; | |
594 | size -= offset; | |
595 | ||
7702ae0d TC |
596 | if (file.size < sizeof(struct acpi_table_header)) { |
597 | pr_err("ACPI OVERRIDE: Table smaller than ACPI header [%s%s]\n", | |
598 | cpio_path, file.name); | |
599 | continue; | |
600 | } | |
53aac44c TR |
601 | |
602 | table = file.data; | |
603 | ||
604 | for (sig = 0; table_sigs[sig]; sig++) | |
605 | if (!memcmp(table->signature, table_sigs[sig], 4)) | |
606 | break; | |
607 | ||
7702ae0d TC |
608 | if (!table_sigs[sig]) { |
609 | pr_err("ACPI OVERRIDE: Unknown signature [%s%s]\n", | |
610 | cpio_path, file.name); | |
611 | continue; | |
612 | } | |
613 | if (file.size != table->length) { | |
614 | pr_err("ACPI OVERRIDE: File length does not match table length [%s%s]\n", | |
615 | cpio_path, file.name); | |
616 | continue; | |
617 | } | |
618 | if (acpi_table_checksum(file.data, table->length)) { | |
619 | pr_err("ACPI OVERRIDE: Bad table checksum [%s%s]\n", | |
620 | cpio_path, file.name); | |
621 | continue; | |
622 | } | |
53aac44c TR |
623 | |
624 | pr_info("%4.4s ACPI table found in initrd [%s%s][0x%x]\n", | |
625 | table->signature, cpio_path, file.name, table->length); | |
626 | ||
627 | all_tables_size += table->length; | |
628 | early_initrd_files[table_nr].data = file.data; | |
629 | early_initrd_files[table_nr].size = file.size; | |
630 | table_nr++; | |
631 | } | |
632 | if (table_nr == 0) | |
633 | return; | |
634 | ||
635 | acpi_tables_addr = | |
636 | memblock_find_in_range(0, max_low_pfn_mapped << PAGE_SHIFT, | |
637 | all_tables_size, PAGE_SIZE); | |
638 | if (!acpi_tables_addr) { | |
639 | WARN_ON(1); | |
640 | return; | |
641 | } | |
642 | /* | |
643 | * Only calling e820_add_reserve does not work and the | |
644 | * tables are invalid (memory got used) later. | |
645 | * memblock_reserve works as expected and the tables won't get modified. | |
646 | * But it's not enough on X86 because ioremap will | |
647 | * complain later (used by acpi_os_map_memory) that the pages | |
648 | * that should get mapped are not marked "reserved". | |
649 | * Both memblock_reserve and e820_add_region (via arch_reserve_mem_area) | |
650 | * works fine. | |
651 | */ | |
a6432ded | 652 | memblock_reserve(acpi_tables_addr, all_tables_size); |
53aac44c TR |
653 | arch_reserve_mem_area(acpi_tables_addr, all_tables_size); |
654 | ||
655 | p = early_ioremap(acpi_tables_addr, all_tables_size); | |
656 | ||
657 | for (no = 0; no < table_nr; no++) { | |
658 | memcpy(p + total_offset, early_initrd_files[no].data, | |
659 | early_initrd_files[no].size); | |
660 | total_offset += early_initrd_files[no].size; | |
661 | } | |
662 | early_iounmap(p, all_tables_size); | |
663 | } | |
664 | #endif /* CONFIG_ACPI_INITRD_TABLE_OVERRIDE */ | |
665 | ||
325a8d36 TR |
666 | static void acpi_table_taint(struct acpi_table_header *table) |
667 | { | |
668 | pr_warn(PREFIX | |
669 | "Override [%4.4s-%8.8s], this is unsafe: tainting kernel\n", | |
670 | table->signature, table->oem_table_id); | |
373d4d09 | 671 | add_taint(TAINT_OVERRIDDEN_ACPI_TABLE, LOCKDEP_NOW_UNRELIABLE); |
325a8d36 TR |
672 | } |
673 | ||
674 | ||
1da177e4 | 675 | acpi_status |
4be44fcd LB |
676 | acpi_os_table_override(struct acpi_table_header * existing_table, |
677 | struct acpi_table_header ** new_table) | |
1da177e4 LT |
678 | { |
679 | if (!existing_table || !new_table) | |
680 | return AE_BAD_PARAMETER; | |
681 | ||
71fc47a9 MG |
682 | *new_table = NULL; |
683 | ||
1da177e4 LT |
684 | #ifdef CONFIG_ACPI_CUSTOM_DSDT |
685 | if (strncmp(existing_table->signature, "DSDT", 4) == 0) | |
4be44fcd | 686 | *new_table = (struct acpi_table_header *)AmlCode; |
1da177e4 | 687 | #endif |
325a8d36 TR |
688 | if (*new_table != NULL) |
689 | acpi_table_taint(existing_table); | |
1da177e4 LT |
690 | return AE_OK; |
691 | } | |
692 | ||
f7b004a1 BM |
693 | acpi_status |
694 | acpi_os_physical_table_override(struct acpi_table_header *existing_table, | |
b2a35003 TR |
695 | acpi_physical_address *address, |
696 | u32 *table_length) | |
f7b004a1 | 697 | { |
b2a35003 TR |
698 | #ifndef CONFIG_ACPI_INITRD_TABLE_OVERRIDE |
699 | *table_length = 0; | |
700 | *address = 0; | |
701 | return AE_OK; | |
702 | #else | |
703 | int table_offset = 0; | |
704 | struct acpi_table_header *table; | |
705 | ||
706 | *table_length = 0; | |
707 | *address = 0; | |
708 | ||
709 | if (!acpi_tables_addr) | |
710 | return AE_OK; | |
711 | ||
712 | do { | |
713 | if (table_offset + ACPI_HEADER_SIZE > all_tables_size) { | |
714 | WARN_ON(1); | |
715 | return AE_OK; | |
716 | } | |
717 | ||
718 | table = acpi_os_map_memory(acpi_tables_addr + table_offset, | |
719 | ACPI_HEADER_SIZE); | |
f7b004a1 | 720 | |
b2a35003 TR |
721 | if (table_offset + table->length > all_tables_size) { |
722 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
723 | WARN_ON(1); | |
724 | return AE_OK; | |
725 | } | |
726 | ||
727 | table_offset += table->length; | |
728 | ||
729 | if (memcmp(existing_table->signature, table->signature, 4)) { | |
730 | acpi_os_unmap_memory(table, | |
731 | ACPI_HEADER_SIZE); | |
732 | continue; | |
733 | } | |
734 | ||
735 | /* Only override tables with matching oem id */ | |
736 | if (memcmp(table->oem_table_id, existing_table->oem_table_id, | |
737 | ACPI_OEM_TABLE_ID_SIZE)) { | |
738 | acpi_os_unmap_memory(table, | |
739 | ACPI_HEADER_SIZE); | |
740 | continue; | |
741 | } | |
742 | ||
743 | table_offset -= table->length; | |
744 | *table_length = table->length; | |
745 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
746 | *address = acpi_tables_addr + table_offset; | |
747 | break; | |
748 | } while (table_offset + ACPI_HEADER_SIZE < all_tables_size); | |
f7b004a1 | 749 | |
325a8d36 TR |
750 | if (*address != 0) |
751 | acpi_table_taint(existing_table); | |
b2a35003 TR |
752 | return AE_OK; |
753 | #endif | |
754 | } | |
f7b004a1 | 755 | |
7d12e780 | 756 | static irqreturn_t acpi_irq(int irq, void *dev_id) |
1da177e4 | 757 | { |
5229e87d LB |
758 | u32 handled; |
759 | ||
760 | handled = (*acpi_irq_handler) (acpi_irq_context); | |
761 | ||
762 | if (handled) { | |
763 | acpi_irq_handled++; | |
764 | return IRQ_HANDLED; | |
88bea188 LB |
765 | } else { |
766 | acpi_irq_not_handled++; | |
5229e87d | 767 | return IRQ_NONE; |
88bea188 | 768 | } |
1da177e4 LT |
769 | } |
770 | ||
771 | acpi_status | |
4be44fcd LB |
772 | acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler, |
773 | void *context) | |
1da177e4 LT |
774 | { |
775 | unsigned int irq; | |
776 | ||
5229e87d LB |
777 | acpi_irq_stats_init(); |
778 | ||
1da177e4 | 779 | /* |
23fe3630 RW |
780 | * ACPI interrupts different from the SCI in our copy of the FADT are |
781 | * not supported. | |
1da177e4 | 782 | */ |
23fe3630 RW |
783 | if (gsi != acpi_gbl_FADT.sci_interrupt) |
784 | return AE_BAD_PARAMETER; | |
785 | ||
786 | if (acpi_irq_handler) | |
787 | return AE_ALREADY_ACQUIRED; | |
788 | ||
1da177e4 LT |
789 | if (acpi_gsi_to_irq(gsi, &irq) < 0) { |
790 | printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n", | |
791 | gsi); | |
792 | return AE_OK; | |
793 | } | |
794 | ||
795 | acpi_irq_handler = handler; | |
796 | acpi_irq_context = context; | |
89a22dad | 797 | if (request_irq(irq, acpi_irq, IRQF_SHARED | IRQF_NO_SUSPEND, "acpi", acpi_irq)) { |
1da177e4 | 798 | printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq); |
23fe3630 | 799 | acpi_irq_handler = NULL; |
1da177e4 LT |
800 | return AE_NOT_ACQUIRED; |
801 | } | |
1da177e4 LT |
802 | |
803 | return AE_OK; | |
804 | } | |
805 | ||
4be44fcd | 806 | acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler) |
1da177e4 | 807 | { |
23fe3630 RW |
808 | if (irq != acpi_gbl_FADT.sci_interrupt) |
809 | return AE_BAD_PARAMETER; | |
810 | ||
811 | free_irq(irq, acpi_irq); | |
812 | acpi_irq_handler = NULL; | |
1da177e4 LT |
813 | |
814 | return AE_OK; | |
815 | } | |
816 | ||
817 | /* | |
818 | * Running in interpreter thread context, safe to sleep | |
819 | */ | |
820 | ||
439913ff | 821 | void acpi_os_sleep(u64 ms) |
1da177e4 | 822 | { |
01a527ec | 823 | schedule_timeout_interruptible(msecs_to_jiffies(ms)); |
1da177e4 | 824 | } |
4be44fcd | 825 | |
4be44fcd | 826 | void acpi_os_stall(u32 us) |
1da177e4 LT |
827 | { |
828 | while (us) { | |
829 | u32 delay = 1000; | |
830 | ||
831 | if (delay > us) | |
832 | delay = us; | |
833 | udelay(delay); | |
834 | touch_nmi_watchdog(); | |
835 | us -= delay; | |
836 | } | |
837 | } | |
4be44fcd | 838 | |
1da177e4 LT |
839 | /* |
840 | * Support ACPI 3.0 AML Timer operand | |
841 | * Returns 64-bit free-running, monotonically increasing timer | |
842 | * with 100ns granularity | |
843 | */ | |
4be44fcd | 844 | u64 acpi_os_get_timer(void) |
1da177e4 | 845 | { |
10619066 MW |
846 | u64 time_ns = ktime_to_ns(ktime_get()); |
847 | do_div(time_ns, 100); | |
848 | return time_ns; | |
1da177e4 LT |
849 | } |
850 | ||
4be44fcd | 851 | acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width) |
1da177e4 LT |
852 | { |
853 | u32 dummy; | |
854 | ||
855 | if (!value) | |
856 | value = &dummy; | |
857 | ||
49fbabf5 ZY |
858 | *value = 0; |
859 | if (width <= 8) { | |
4be44fcd | 860 | *(u8 *) value = inb(port); |
49fbabf5 | 861 | } else if (width <= 16) { |
4be44fcd | 862 | *(u16 *) value = inw(port); |
49fbabf5 | 863 | } else if (width <= 32) { |
4be44fcd | 864 | *(u32 *) value = inl(port); |
49fbabf5 | 865 | } else { |
1da177e4 LT |
866 | BUG(); |
867 | } | |
868 | ||
869 | return AE_OK; | |
870 | } | |
4be44fcd | 871 | |
1da177e4 LT |
872 | EXPORT_SYMBOL(acpi_os_read_port); |
873 | ||
4be44fcd | 874 | acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width) |
1da177e4 | 875 | { |
49fbabf5 | 876 | if (width <= 8) { |
1da177e4 | 877 | outb(value, port); |
49fbabf5 | 878 | } else if (width <= 16) { |
1da177e4 | 879 | outw(value, port); |
49fbabf5 | 880 | } else if (width <= 32) { |
1da177e4 | 881 | outl(value, port); |
49fbabf5 | 882 | } else { |
1da177e4 LT |
883 | BUG(); |
884 | } | |
885 | ||
886 | return AE_OK; | |
887 | } | |
4be44fcd | 888 | |
1da177e4 LT |
889 | EXPORT_SYMBOL(acpi_os_write_port); |
890 | ||
e615bf5b MS |
891 | #ifdef readq |
892 | static inline u64 read64(const volatile void __iomem *addr) | |
893 | { | |
894 | return readq(addr); | |
895 | } | |
896 | #else | |
897 | static inline u64 read64(const volatile void __iomem *addr) | |
898 | { | |
899 | u64 l, h; | |
900 | l = readl(addr); | |
901 | h = readl(addr+4); | |
902 | return l | (h << 32); | |
903 | } | |
904 | #endif | |
905 | ||
906 | acpi_status | |
653f4b53 | 907 | acpi_os_read_memory(acpi_physical_address phys_addr, u64 *value, u32 width) |
e615bf5b MS |
908 | { |
909 | void __iomem *virt_addr; | |
910 | unsigned int size = width / 8; | |
911 | bool unmap = false; | |
912 | u64 dummy; | |
913 | ||
914 | rcu_read_lock(); | |
915 | virt_addr = acpi_map_vaddr_lookup(phys_addr, size); | |
916 | if (!virt_addr) { | |
917 | rcu_read_unlock(); | |
918 | virt_addr = acpi_os_ioremap(phys_addr, size); | |
919 | if (!virt_addr) | |
920 | return AE_BAD_ADDRESS; | |
921 | unmap = true; | |
922 | } | |
923 | ||
924 | if (!value) | |
925 | value = &dummy; | |
926 | ||
927 | switch (width) { | |
928 | case 8: | |
929 | *(u8 *) value = readb(virt_addr); | |
930 | break; | |
931 | case 16: | |
932 | *(u16 *) value = readw(virt_addr); | |
933 | break; | |
934 | case 32: | |
935 | *(u32 *) value = readl(virt_addr); | |
936 | break; | |
937 | case 64: | |
938 | *(u64 *) value = read64(virt_addr); | |
939 | break; | |
940 | default: | |
941 | BUG(); | |
942 | } | |
943 | ||
944 | if (unmap) | |
945 | iounmap(virt_addr); | |
946 | else | |
947 | rcu_read_unlock(); | |
948 | ||
949 | return AE_OK; | |
950 | } | |
951 | ||
e615bf5b MS |
952 | #ifdef writeq |
953 | static inline void write64(u64 val, volatile void __iomem *addr) | |
954 | { | |
955 | writeq(val, addr); | |
956 | } | |
957 | #else | |
958 | static inline void write64(u64 val, volatile void __iomem *addr) | |
959 | { | |
960 | writel(val, addr); | |
961 | writel(val>>32, addr+4); | |
962 | } | |
963 | #endif | |
964 | ||
965 | acpi_status | |
653f4b53 | 966 | acpi_os_write_memory(acpi_physical_address phys_addr, u64 value, u32 width) |
e615bf5b MS |
967 | { |
968 | void __iomem *virt_addr; | |
969 | unsigned int size = width / 8; | |
970 | bool unmap = false; | |
971 | ||
972 | rcu_read_lock(); | |
973 | virt_addr = acpi_map_vaddr_lookup(phys_addr, size); | |
974 | if (!virt_addr) { | |
975 | rcu_read_unlock(); | |
976 | virt_addr = acpi_os_ioremap(phys_addr, size); | |
977 | if (!virt_addr) | |
978 | return AE_BAD_ADDRESS; | |
979 | unmap = true; | |
980 | } | |
981 | ||
982 | switch (width) { | |
983 | case 8: | |
984 | writeb(value, virt_addr); | |
985 | break; | |
986 | case 16: | |
987 | writew(value, virt_addr); | |
988 | break; | |
989 | case 32: | |
990 | writel(value, virt_addr); | |
991 | break; | |
992 | case 64: | |
993 | write64(value, virt_addr); | |
994 | break; | |
995 | default: | |
996 | BUG(); | |
997 | } | |
998 | ||
999 | if (unmap) | |
1000 | iounmap(virt_addr); | |
1001 | else | |
1002 | rcu_read_unlock(); | |
1003 | ||
1004 | return AE_OK; | |
1005 | } | |
1006 | ||
1da177e4 | 1007 | acpi_status |
4be44fcd | 1008 | acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
c5f0231e | 1009 | u64 *value, u32 width) |
1da177e4 LT |
1010 | { |
1011 | int result, size; | |
c5f0231e | 1012 | u32 value32; |
1da177e4 LT |
1013 | |
1014 | if (!value) | |
1015 | return AE_BAD_PARAMETER; | |
1016 | ||
1017 | switch (width) { | |
1018 | case 8: | |
1019 | size = 1; | |
1020 | break; | |
1021 | case 16: | |
1022 | size = 2; | |
1023 | break; | |
1024 | case 32: | |
1025 | size = 4; | |
1026 | break; | |
1027 | default: | |
1028 | return AE_ERROR; | |
1029 | } | |
1030 | ||
b6ce068a MW |
1031 | result = raw_pci_read(pci_id->segment, pci_id->bus, |
1032 | PCI_DEVFN(pci_id->device, pci_id->function), | |
c5f0231e BM |
1033 | reg, size, &value32); |
1034 | *value = value32; | |
1da177e4 LT |
1035 | |
1036 | return (result ? AE_ERROR : AE_OK); | |
1037 | } | |
4be44fcd | 1038 | |
1da177e4 | 1039 | acpi_status |
4be44fcd | 1040 | acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
439913ff | 1041 | u64 value, u32 width) |
1da177e4 LT |
1042 | { |
1043 | int result, size; | |
1044 | ||
1045 | switch (width) { | |
1046 | case 8: | |
1047 | size = 1; | |
1048 | break; | |
1049 | case 16: | |
1050 | size = 2; | |
1051 | break; | |
1052 | case 32: | |
1053 | size = 4; | |
1054 | break; | |
1055 | default: | |
1056 | return AE_ERROR; | |
1057 | } | |
1058 | ||
b6ce068a MW |
1059 | result = raw_pci_write(pci_id->segment, pci_id->bus, |
1060 | PCI_DEVFN(pci_id->device, pci_id->function), | |
1061 | reg, size, value); | |
1da177e4 LT |
1062 | |
1063 | return (result ? AE_ERROR : AE_OK); | |
1064 | } | |
1065 | ||
65f27f38 | 1066 | static void acpi_os_execute_deferred(struct work_struct *work) |
88db5e14 AS |
1067 | { |
1068 | struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work); | |
88db5e14 | 1069 | |
9ac61856 | 1070 | if (dpc->wait) |
bd6f10a5 | 1071 | acpi_os_wait_events_complete(); |
19cd847a ZR |
1072 | |
1073 | dpc->function(dpc->context); | |
1074 | kfree(dpc); | |
19cd847a ZR |
1075 | } |
1076 | ||
b8d35192 AS |
1077 | /******************************************************************************* |
1078 | * | |
1079 | * FUNCTION: acpi_os_execute | |
1080 | * | |
1081 | * PARAMETERS: Type - Type of the callback | |
1082 | * Function - Function to be executed | |
1083 | * Context - Function parameters | |
1084 | * | |
1085 | * RETURN: Status | |
1086 | * | |
1087 | * DESCRIPTION: Depending on type, either queues function for deferred execution or | |
1088 | * immediately executes function on a separate thread. | |
1089 | * | |
1090 | ******************************************************************************/ | |
1091 | ||
19cd847a ZR |
1092 | static acpi_status __acpi_os_execute(acpi_execute_type type, |
1093 | acpi_osd_exec_callback function, void *context, int hp) | |
1da177e4 | 1094 | { |
4be44fcd LB |
1095 | acpi_status status = AE_OK; |
1096 | struct acpi_os_dpc *dpc; | |
17bc54ee | 1097 | struct workqueue_struct *queue; |
19cd847a | 1098 | int ret; |
72945b2b LB |
1099 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
1100 | "Scheduling function [%p(%p)] for deferred execution.\n", | |
1101 | function, context)); | |
1da177e4 | 1102 | |
1da177e4 LT |
1103 | /* |
1104 | * Allocate/initialize DPC structure. Note that this memory will be | |
65f27f38 | 1105 | * freed by the callee. The kernel handles the work_struct list in a |
1da177e4 LT |
1106 | * way that allows us to also free its memory inside the callee. |
1107 | * Because we may want to schedule several tasks with different | |
1108 | * parameters we can't use the approach some kernel code uses of | |
65f27f38 | 1109 | * having a static work_struct. |
1da177e4 | 1110 | */ |
72945b2b | 1111 | |
3ae45a27 | 1112 | dpc = kzalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC); |
1da177e4 | 1113 | if (!dpc) |
889c78be | 1114 | return AE_NO_MEMORY; |
b976fe19 | 1115 | |
1da177e4 LT |
1116 | dpc->function = function; |
1117 | dpc->context = context; | |
b976fe19 | 1118 | |
c02256be ZR |
1119 | /* |
1120 | * We can't run hotplug code in keventd_wq/kacpid_wq/kacpid_notify_wq | |
1121 | * because the hotplug code may call driver .remove() functions, | |
1122 | * which invoke flush_scheduled_work/acpi_os_wait_events_complete | |
1123 | * to flush these workqueues. | |
3ae45a27 RW |
1124 | * |
1125 | * To prevent lockdep from complaining unnecessarily, make sure that | |
1126 | * there is a different static lockdep key for each workqueue by using | |
1127 | * INIT_WORK() for each of them separately. | |
c02256be | 1128 | */ |
3ae45a27 RW |
1129 | if (hp) { |
1130 | queue = kacpi_hotplug_wq; | |
1131 | dpc->wait = 1; | |
bc73675b | 1132 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); |
3ae45a27 RW |
1133 | } else if (type == OSL_NOTIFY_HANDLER) { |
1134 | queue = kacpi_notify_wq; | |
bc73675b | 1135 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); |
3ae45a27 RW |
1136 | } else { |
1137 | queue = kacpid_wq; | |
bc73675b | 1138 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); |
3ae45a27 | 1139 | } |
bc73675b | 1140 | |
8fec62b2 TH |
1141 | /* |
1142 | * On some machines, a software-initiated SMI causes corruption unless | |
1143 | * the SMI runs on CPU 0. An SMI can be initiated by any AML, but | |
1144 | * typically it's done in GPE-related methods that are run via | |
1145 | * workqueues, so we can avoid the known corruption cases by always | |
1146 | * queueing on CPU 0. | |
1147 | */ | |
1148 | ret = queue_work_on(0, queue, &dpc->work); | |
19cd847a ZR |
1149 | |
1150 | if (!ret) { | |
55ac9a01 LM |
1151 | printk(KERN_ERR PREFIX |
1152 | "Call to queue_work() failed.\n"); | |
17bc54ee AS |
1153 | status = AE_ERROR; |
1154 | kfree(dpc); | |
1da177e4 | 1155 | } |
889c78be | 1156 | return status; |
1da177e4 | 1157 | } |
4be44fcd | 1158 | |
19cd847a ZR |
1159 | acpi_status acpi_os_execute(acpi_execute_type type, |
1160 | acpi_osd_exec_callback function, void *context) | |
1161 | { | |
1162 | return __acpi_os_execute(type, function, context, 0); | |
1163 | } | |
b8d35192 | 1164 | EXPORT_SYMBOL(acpi_os_execute); |
1da177e4 | 1165 | |
19cd847a ZR |
1166 | acpi_status acpi_os_hotplug_execute(acpi_osd_exec_callback function, |
1167 | void *context) | |
1168 | { | |
1169 | return __acpi_os_execute(0, function, context, 1); | |
1170 | } | |
61622acc | 1171 | EXPORT_SYMBOL(acpi_os_hotplug_execute); |
19cd847a | 1172 | |
bd6f10a5 | 1173 | void acpi_os_wait_events_complete(void) |
1da177e4 LT |
1174 | { |
1175 | flush_workqueue(kacpid_wq); | |
2f67a069 | 1176 | flush_workqueue(kacpi_notify_wq); |
1da177e4 | 1177 | } |
4be44fcd | 1178 | |
1da177e4 LT |
1179 | EXPORT_SYMBOL(acpi_os_wait_events_complete); |
1180 | ||
1da177e4 | 1181 | acpi_status |
4be44fcd | 1182 | acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle) |
1da177e4 | 1183 | { |
4be44fcd | 1184 | struct semaphore *sem = NULL; |
1da177e4 | 1185 | |
1da177e4 LT |
1186 | sem = acpi_os_allocate(sizeof(struct semaphore)); |
1187 | if (!sem) | |
d550d98d | 1188 | return AE_NO_MEMORY; |
1da177e4 LT |
1189 | memset(sem, 0, sizeof(struct semaphore)); |
1190 | ||
1191 | sema_init(sem, initial_units); | |
1192 | ||
4be44fcd | 1193 | *handle = (acpi_handle *) sem; |
1da177e4 | 1194 | |
4be44fcd LB |
1195 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n", |
1196 | *handle, initial_units)); | |
1da177e4 | 1197 | |
d550d98d | 1198 | return AE_OK; |
1da177e4 | 1199 | } |
1da177e4 | 1200 | |
1da177e4 LT |
1201 | /* |
1202 | * TODO: A better way to delete semaphores? Linux doesn't have a | |
1203 | * 'delete_semaphore()' function -- may result in an invalid | |
1204 | * pointer dereference for non-synchronized consumers. Should | |
1205 | * we at least check for blocked threads and signal/cancel them? | |
1206 | */ | |
1207 | ||
4be44fcd | 1208 | acpi_status acpi_os_delete_semaphore(acpi_handle handle) |
1da177e4 | 1209 | { |
4be44fcd | 1210 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 1211 | |
1da177e4 | 1212 | if (!sem) |
d550d98d | 1213 | return AE_BAD_PARAMETER; |
1da177e4 | 1214 | |
4be44fcd | 1215 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle)); |
1da177e4 | 1216 | |
f1241c87 | 1217 | BUG_ON(!list_empty(&sem->wait_list)); |
02438d87 | 1218 | kfree(sem); |
4be44fcd | 1219 | sem = NULL; |
1da177e4 | 1220 | |
d550d98d | 1221 | return AE_OK; |
1da177e4 | 1222 | } |
1da177e4 | 1223 | |
1da177e4 | 1224 | /* |
1da177e4 LT |
1225 | * TODO: Support for units > 1? |
1226 | */ | |
4be44fcd | 1227 | acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout) |
1da177e4 | 1228 | { |
4be44fcd LB |
1229 | acpi_status status = AE_OK; |
1230 | struct semaphore *sem = (struct semaphore *)handle; | |
f1241c87 | 1231 | long jiffies; |
4be44fcd | 1232 | int ret = 0; |
1da177e4 | 1233 | |
1da177e4 | 1234 | if (!sem || (units < 1)) |
d550d98d | 1235 | return AE_BAD_PARAMETER; |
1da177e4 LT |
1236 | |
1237 | if (units > 1) | |
d550d98d | 1238 | return AE_SUPPORT; |
1da177e4 | 1239 | |
4be44fcd LB |
1240 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n", |
1241 | handle, units, timeout)); | |
1da177e4 | 1242 | |
f1241c87 MW |
1243 | if (timeout == ACPI_WAIT_FOREVER) |
1244 | jiffies = MAX_SCHEDULE_TIMEOUT; | |
1245 | else | |
1246 | jiffies = msecs_to_jiffies(timeout); | |
1247 | ||
1248 | ret = down_timeout(sem, jiffies); | |
1249 | if (ret) | |
1250 | status = AE_TIME; | |
1da177e4 LT |
1251 | |
1252 | if (ACPI_FAILURE(status)) { | |
9e7e2c04 | 1253 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, |
a6fc6720 | 1254 | "Failed to acquire semaphore[%p|%d|%d], %s", |
4be44fcd LB |
1255 | handle, units, timeout, |
1256 | acpi_format_exception(status))); | |
1257 | } else { | |
1258 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, | |
a6fc6720 | 1259 | "Acquired semaphore[%p|%d|%d]", handle, |
4be44fcd | 1260 | units, timeout)); |
1da177e4 LT |
1261 | } |
1262 | ||
d550d98d | 1263 | return status; |
1da177e4 | 1264 | } |
1da177e4 | 1265 | |
1da177e4 LT |
1266 | /* |
1267 | * TODO: Support for units > 1? | |
1268 | */ | |
4be44fcd | 1269 | acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units) |
1da177e4 | 1270 | { |
4be44fcd | 1271 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 1272 | |
1da177e4 | 1273 | if (!sem || (units < 1)) |
d550d98d | 1274 | return AE_BAD_PARAMETER; |
1da177e4 LT |
1275 | |
1276 | if (units > 1) | |
d550d98d | 1277 | return AE_SUPPORT; |
1da177e4 | 1278 | |
4be44fcd LB |
1279 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle, |
1280 | units)); | |
1da177e4 LT |
1281 | |
1282 | up(sem); | |
1283 | ||
d550d98d | 1284 | return AE_OK; |
1da177e4 | 1285 | } |
4be44fcd | 1286 | |
1da177e4 | 1287 | #ifdef ACPI_FUTURE_USAGE |
4be44fcd | 1288 | u32 acpi_os_get_line(char *buffer) |
1da177e4 LT |
1289 | { |
1290 | ||
1291 | #ifdef ENABLE_DEBUGGER | |
1292 | if (acpi_in_debugger) { | |
1293 | u32 chars; | |
1294 | ||
1295 | kdb_read(buffer, sizeof(line_buf)); | |
1296 | ||
1297 | /* remove the CR kdb includes */ | |
1298 | chars = strlen(buffer) - 1; | |
1299 | buffer[chars] = '\0'; | |
1300 | } | |
1301 | #endif | |
1302 | ||
1303 | return 0; | |
1304 | } | |
4be44fcd | 1305 | #endif /* ACPI_FUTURE_USAGE */ |
1da177e4 | 1306 | |
4be44fcd | 1307 | acpi_status acpi_os_signal(u32 function, void *info) |
1da177e4 | 1308 | { |
4be44fcd | 1309 | switch (function) { |
1da177e4 LT |
1310 | case ACPI_SIGNAL_FATAL: |
1311 | printk(KERN_ERR PREFIX "Fatal opcode executed\n"); | |
1312 | break; | |
1313 | case ACPI_SIGNAL_BREAKPOINT: | |
1314 | /* | |
1315 | * AML Breakpoint | |
1316 | * ACPI spec. says to treat it as a NOP unless | |
1317 | * you are debugging. So if/when we integrate | |
1318 | * AML debugger into the kernel debugger its | |
1319 | * hook will go here. But until then it is | |
1320 | * not useful to print anything on breakpoints. | |
1321 | */ | |
1322 | break; | |
1323 | default: | |
1324 | break; | |
1325 | } | |
1326 | ||
1327 | return AE_OK; | |
1328 | } | |
4be44fcd | 1329 | |
4be44fcd | 1330 | static int __init acpi_os_name_setup(char *str) |
1da177e4 LT |
1331 | { |
1332 | char *p = acpi_os_name; | |
4be44fcd | 1333 | int count = ACPI_MAX_OVERRIDE_LEN - 1; |
1da177e4 LT |
1334 | |
1335 | if (!str || !*str) | |
1336 | return 0; | |
1337 | ||
1338 | for (; count-- && str && *str; str++) { | |
1339 | if (isalnum(*str) || *str == ' ' || *str == ':') | |
1340 | *p++ = *str; | |
1341 | else if (*str == '\'' || *str == '"') | |
1342 | continue; | |
1343 | else | |
1344 | break; | |
1345 | } | |
1346 | *p = 0; | |
1347 | ||
1348 | return 1; | |
4be44fcd | 1349 | |
1da177e4 LT |
1350 | } |
1351 | ||
1352 | __setup("acpi_os_name=", acpi_os_name_setup); | |
1353 | ||
12d32064 LM |
1354 | #define OSI_STRING_LENGTH_MAX 64 /* arbitrary */ |
1355 | #define OSI_STRING_ENTRIES_MAX 16 /* arbitrary */ | |
1356 | ||
1357 | struct osi_setup_entry { | |
1358 | char string[OSI_STRING_LENGTH_MAX]; | |
1359 | bool enable; | |
1360 | }; | |
1361 | ||
e73d3136 HG |
1362 | static struct osi_setup_entry |
1363 | osi_setup_entries[OSI_STRING_ENTRIES_MAX] __initdata = { | |
aa165971 SL |
1364 | {"Module Device", true}, |
1365 | {"Processor Device", true}, | |
1366 | {"3.0 _SCP Extensions", true}, | |
1367 | {"Processor Aggregator Device", true}, | |
1368 | }; | |
12d32064 | 1369 | |
d90aa92c LM |
1370 | void __init acpi_osi_setup(char *str) |
1371 | { | |
12d32064 LM |
1372 | struct osi_setup_entry *osi; |
1373 | bool enable = true; | |
1374 | int i; | |
1375 | ||
d90aa92c LM |
1376 | if (!acpi_gbl_create_osi_method) |
1377 | return; | |
1378 | ||
1379 | if (str == NULL || *str == '\0') { | |
1380 | printk(KERN_INFO PREFIX "_OSI method disabled\n"); | |
1381 | acpi_gbl_create_osi_method = FALSE; | |
12d32064 LM |
1382 | return; |
1383 | } | |
1384 | ||
1385 | if (*str == '!') { | |
1386 | str++; | |
5dc17986 LZ |
1387 | if (*str == '\0') { |
1388 | osi_linux.default_disabling = 1; | |
1389 | return; | |
741d8128 LZ |
1390 | } else if (*str == '*') { |
1391 | acpi_update_interfaces(ACPI_DISABLE_ALL_STRINGS); | |
1392 | for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { | |
1393 | osi = &osi_setup_entries[i]; | |
1394 | osi->enable = false; | |
1395 | } | |
1396 | return; | |
5dc17986 | 1397 | } |
12d32064 LM |
1398 | enable = false; |
1399 | } | |
1400 | ||
1401 | for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { | |
1402 | osi = &osi_setup_entries[i]; | |
1403 | if (!strcmp(osi->string, str)) { | |
1404 | osi->enable = enable; | |
1405 | break; | |
1406 | } else if (osi->string[0] == '\0') { | |
1407 | osi->enable = enable; | |
1408 | strncpy(osi->string, str, OSI_STRING_LENGTH_MAX); | |
1409 | break; | |
1410 | } | |
1411 | } | |
d90aa92c LM |
1412 | } |
1413 | ||
d4b7dc49 LB |
1414 | static void __init set_osi_linux(unsigned int enable) |
1415 | { | |
d90aa92c | 1416 | if (osi_linux.enable != enable) |
d4b7dc49 | 1417 | osi_linux.enable = enable; |
b0ed7a91 LM |
1418 | |
1419 | if (osi_linux.enable) | |
1420 | acpi_osi_setup("Linux"); | |
1421 | else | |
1422 | acpi_osi_setup("!Linux"); | |
1423 | ||
d4b7dc49 LB |
1424 | return; |
1425 | } | |
1426 | ||
1427 | static void __init acpi_cmdline_osi_linux(unsigned int enable) | |
1428 | { | |
d90aa92c LM |
1429 | osi_linux.cmdline = 1; /* cmdline set the default and override DMI */ |
1430 | osi_linux.dmi = 0; | |
d4b7dc49 LB |
1431 | set_osi_linux(enable); |
1432 | ||
1433 | return; | |
1434 | } | |
1435 | ||
1436 | void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d) | |
1437 | { | |
d4b7dc49 LB |
1438 | printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident); |
1439 | ||
1440 | if (enable == -1) | |
1441 | return; | |
1442 | ||
d90aa92c | 1443 | osi_linux.dmi = 1; /* DMI knows that this box asks OSI(Linux) */ |
d4b7dc49 | 1444 | set_osi_linux(enable); |
f507654d | 1445 | |
f507654d LB |
1446 | return; |
1447 | } | |
1448 | ||
1da177e4 | 1449 | /* |
ae00d812 LB |
1450 | * Modify the list of "OS Interfaces" reported to BIOS via _OSI |
1451 | * | |
1da177e4 | 1452 | * empty string disables _OSI |
ae00d812 LB |
1453 | * string starting with '!' disables that string |
1454 | * otherwise string is added to list, augmenting built-in strings | |
1da177e4 | 1455 | */ |
b0ed7a91 | 1456 | static void __init acpi_osi_setup_late(void) |
1da177e4 | 1457 | { |
12d32064 LM |
1458 | struct osi_setup_entry *osi; |
1459 | char *str; | |
1460 | int i; | |
d90aa92c | 1461 | acpi_status status; |
b0ed7a91 | 1462 | |
5dc17986 LZ |
1463 | if (osi_linux.default_disabling) { |
1464 | status = acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS); | |
1465 | ||
1466 | if (ACPI_SUCCESS(status)) | |
1467 | printk(KERN_INFO PREFIX "Disabled all _OSI OS vendors\n"); | |
1468 | } | |
1469 | ||
12d32064 LM |
1470 | for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { |
1471 | osi = &osi_setup_entries[i]; | |
1472 | str = osi->string; | |
b0ed7a91 | 1473 | |
12d32064 LM |
1474 | if (*str == '\0') |
1475 | break; | |
1476 | if (osi->enable) { | |
1477 | status = acpi_install_interface(str); | |
d90aa92c | 1478 | |
12d32064 LM |
1479 | if (ACPI_SUCCESS(status)) |
1480 | printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str); | |
1481 | } else { | |
1482 | status = acpi_remove_interface(str); | |
d90aa92c | 1483 | |
12d32064 LM |
1484 | if (ACPI_SUCCESS(status)) |
1485 | printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str); | |
1486 | } | |
b0ed7a91 LM |
1487 | } |
1488 | } | |
1489 | ||
d90aa92c | 1490 | static int __init osi_setup(char *str) |
b0ed7a91 | 1491 | { |
d90aa92c LM |
1492 | if (str && !strcmp("Linux", str)) |
1493 | acpi_cmdline_osi_linux(1); | |
1494 | else if (str && !strcmp("!Linux", str)) | |
1495 | acpi_cmdline_osi_linux(0); | |
1496 | else | |
1497 | acpi_osi_setup(str); | |
1da177e4 LT |
1498 | |
1499 | return 1; | |
1500 | } | |
1501 | ||
d90aa92c | 1502 | __setup("acpi_osi=", osi_setup); |
1da177e4 LT |
1503 | |
1504 | /* enable serialization to combat AE_ALREADY_EXISTS errors */ | |
4be44fcd | 1505 | static int __init acpi_serialize_setup(char *str) |
1da177e4 LT |
1506 | { |
1507 | printk(KERN_INFO PREFIX "serialize enabled\n"); | |
1508 | ||
1509 | acpi_gbl_all_methods_serialized = TRUE; | |
1510 | ||
1511 | return 1; | |
1512 | } | |
1513 | ||
1514 | __setup("acpi_serialize", acpi_serialize_setup); | |
1515 | ||
df92e695 TR |
1516 | /* Check of resource interference between native drivers and ACPI |
1517 | * OperationRegions (SystemIO and System Memory only). | |
1518 | * IO ports and memory declared in ACPI might be used by the ACPI subsystem | |
1519 | * in arbitrary AML code and can interfere with legacy drivers. | |
1520 | * acpi_enforce_resources= can be set to: | |
1521 | * | |
7e90560c | 1522 | * - strict (default) (2) |
df92e695 | 1523 | * -> further driver trying to access the resources will not load |
7e90560c | 1524 | * - lax (1) |
df92e695 TR |
1525 | * -> further driver trying to access the resources will load, but you |
1526 | * get a system message that something might go wrong... | |
1527 | * | |
1528 | * - no (0) | |
1529 | * -> ACPI Operation Region resources will not be registered | |
1530 | * | |
1531 | */ | |
1532 | #define ENFORCE_RESOURCES_STRICT 2 | |
1533 | #define ENFORCE_RESOURCES_LAX 1 | |
1534 | #define ENFORCE_RESOURCES_NO 0 | |
1535 | ||
7e90560c | 1536 | static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; |
df92e695 TR |
1537 | |
1538 | static int __init acpi_enforce_resources_setup(char *str) | |
1539 | { | |
1540 | if (str == NULL || *str == '\0') | |
1541 | return 0; | |
1542 | ||
1543 | if (!strcmp("strict", str)) | |
1544 | acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; | |
1545 | else if (!strcmp("lax", str)) | |
1546 | acpi_enforce_resources = ENFORCE_RESOURCES_LAX; | |
1547 | else if (!strcmp("no", str)) | |
1548 | acpi_enforce_resources = ENFORCE_RESOURCES_NO; | |
1549 | ||
1550 | return 1; | |
1551 | } | |
1552 | ||
1553 | __setup("acpi_enforce_resources=", acpi_enforce_resources_setup); | |
1554 | ||
1555 | /* Check for resource conflicts between ACPI OperationRegions and native | |
1556 | * drivers */ | |
876fba43 | 1557 | int acpi_check_resource_conflict(const struct resource *res) |
df92e695 | 1558 | { |
f654c0fe LM |
1559 | acpi_adr_space_type space_id; |
1560 | acpi_size length; | |
1561 | u8 warn = 0; | |
1562 | int clash = 0; | |
df92e695 TR |
1563 | |
1564 | if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) | |
1565 | return 0; | |
1566 | if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM)) | |
1567 | return 0; | |
1568 | ||
f654c0fe LM |
1569 | if (res->flags & IORESOURCE_IO) |
1570 | space_id = ACPI_ADR_SPACE_SYSTEM_IO; | |
1571 | else | |
1572 | space_id = ACPI_ADR_SPACE_SYSTEM_MEMORY; | |
df92e695 | 1573 | |
e4f52244 | 1574 | length = resource_size(res); |
f654c0fe LM |
1575 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) |
1576 | warn = 1; | |
1577 | clash = acpi_check_address_range(space_id, res->start, length, warn); | |
df92e695 TR |
1578 | |
1579 | if (clash) { | |
1580 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) { | |
14f03343 JD |
1581 | if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX) |
1582 | printk(KERN_NOTICE "ACPI: This conflict may" | |
1583 | " cause random problems and system" | |
1584 | " instability\n"); | |
1585 | printk(KERN_INFO "ACPI: If an ACPI driver is available" | |
1586 | " for this device, you should use it instead of" | |
1587 | " the native driver\n"); | |
df92e695 TR |
1588 | } |
1589 | if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT) | |
1590 | return -EBUSY; | |
1591 | } | |
1592 | return 0; | |
1593 | } | |
443dea72 | 1594 | EXPORT_SYMBOL(acpi_check_resource_conflict); |
df92e695 TR |
1595 | |
1596 | int acpi_check_region(resource_size_t start, resource_size_t n, | |
1597 | const char *name) | |
1598 | { | |
1599 | struct resource res = { | |
1600 | .start = start, | |
1601 | .end = start + n - 1, | |
1602 | .name = name, | |
1603 | .flags = IORESOURCE_IO, | |
1604 | }; | |
1605 | ||
1606 | return acpi_check_resource_conflict(&res); | |
1607 | } | |
1608 | EXPORT_SYMBOL(acpi_check_region); | |
1609 | ||
70dd6bea JD |
1610 | /* |
1611 | * Let drivers know whether the resource checks are effective | |
1612 | */ | |
1613 | int acpi_resources_are_enforced(void) | |
1614 | { | |
1615 | return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT; | |
1616 | } | |
1617 | EXPORT_SYMBOL(acpi_resources_are_enforced); | |
1618 | ||
9f63b88b LM |
1619 | /* |
1620 | * Deallocate the memory for a spinlock. | |
1621 | */ | |
1622 | void acpi_os_delete_lock(acpi_spinlock handle) | |
1623 | { | |
1624 | ACPI_FREE(handle); | |
1625 | } | |
1626 | ||
73459f73 RM |
1627 | /* |
1628 | * Acquire a spinlock. | |
1629 | * | |
1630 | * handle is a pointer to the spinlock_t. | |
73459f73 RM |
1631 | */ |
1632 | ||
967440e3 | 1633 | acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp) |
73459f73 | 1634 | { |
b8e4d893 | 1635 | acpi_cpu_flags flags; |
967440e3 | 1636 | spin_lock_irqsave(lockp, flags); |
73459f73 RM |
1637 | return flags; |
1638 | } | |
1639 | ||
1640 | /* | |
1641 | * Release a spinlock. See above. | |
1642 | */ | |
1643 | ||
967440e3 | 1644 | void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags) |
73459f73 | 1645 | { |
967440e3 | 1646 | spin_unlock_irqrestore(lockp, flags); |
73459f73 RM |
1647 | } |
1648 | ||
73459f73 RM |
1649 | #ifndef ACPI_USE_LOCAL_CACHE |
1650 | ||
1651 | /******************************************************************************* | |
1652 | * | |
1653 | * FUNCTION: acpi_os_create_cache | |
1654 | * | |
b229cf92 BM |
1655 | * PARAMETERS: name - Ascii name for the cache |
1656 | * size - Size of each cached object | |
1657 | * depth - Maximum depth of the cache (in objects) <ignored> | |
1658 | * cache - Where the new cache object is returned | |
73459f73 | 1659 | * |
b229cf92 | 1660 | * RETURN: status |
73459f73 RM |
1661 | * |
1662 | * DESCRIPTION: Create a cache object | |
1663 | * | |
1664 | ******************************************************************************/ | |
1665 | ||
1666 | acpi_status | |
4be44fcd | 1667 | acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache) |
73459f73 | 1668 | { |
20c2df83 | 1669 | *cache = kmem_cache_create(name, size, 0, 0, NULL); |
a6fdbf90 | 1670 | if (*cache == NULL) |
b229cf92 BM |
1671 | return AE_ERROR; |
1672 | else | |
1673 | return AE_OK; | |
73459f73 RM |
1674 | } |
1675 | ||
1676 | /******************************************************************************* | |
1677 | * | |
1678 | * FUNCTION: acpi_os_purge_cache | |
1679 | * | |
1680 | * PARAMETERS: Cache - Handle to cache object | |
1681 | * | |
1682 | * RETURN: Status | |
1683 | * | |
1684 | * DESCRIPTION: Free all objects within the requested cache. | |
1685 | * | |
1686 | ******************************************************************************/ | |
1687 | ||
4be44fcd | 1688 | acpi_status acpi_os_purge_cache(acpi_cache_t * cache) |
73459f73 | 1689 | { |
50dd0969 | 1690 | kmem_cache_shrink(cache); |
4be44fcd | 1691 | return (AE_OK); |
73459f73 RM |
1692 | } |
1693 | ||
1694 | /******************************************************************************* | |
1695 | * | |
1696 | * FUNCTION: acpi_os_delete_cache | |
1697 | * | |
1698 | * PARAMETERS: Cache - Handle to cache object | |
1699 | * | |
1700 | * RETURN: Status | |
1701 | * | |
1702 | * DESCRIPTION: Free all objects within the requested cache and delete the | |
1703 | * cache object. | |
1704 | * | |
1705 | ******************************************************************************/ | |
1706 | ||
4be44fcd | 1707 | acpi_status acpi_os_delete_cache(acpi_cache_t * cache) |
73459f73 | 1708 | { |
1a1d92c1 | 1709 | kmem_cache_destroy(cache); |
4be44fcd | 1710 | return (AE_OK); |
73459f73 RM |
1711 | } |
1712 | ||
1713 | /******************************************************************************* | |
1714 | * | |
1715 | * FUNCTION: acpi_os_release_object | |
1716 | * | |
1717 | * PARAMETERS: Cache - Handle to cache object | |
1718 | * Object - The object to be released | |
1719 | * | |
1720 | * RETURN: None | |
1721 | * | |
1722 | * DESCRIPTION: Release an object to the specified cache. If cache is full, | |
1723 | * the object is deleted. | |
1724 | * | |
1725 | ******************************************************************************/ | |
1726 | ||
4be44fcd | 1727 | acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object) |
73459f73 | 1728 | { |
4be44fcd LB |
1729 | kmem_cache_free(cache, object); |
1730 | return (AE_OK); | |
73459f73 | 1731 | } |
73459f73 | 1732 | #endif |
d362edaf | 1733 | |
b75dd297 LZ |
1734 | static int __init acpi_no_auto_ssdt_setup(char *s) |
1735 | { | |
1736 | printk(KERN_NOTICE PREFIX "SSDT auto-load disabled\n"); | |
1737 | ||
1738 | acpi_gbl_disable_ssdt_table_load = TRUE; | |
1739 | ||
1740 | return 1; | |
1741 | } | |
1742 | ||
1743 | __setup("acpi_no_auto_ssdt", acpi_no_auto_ssdt_setup); | |
1744 | ||
d362edaf MS |
1745 | acpi_status __init acpi_os_initialize(void) |
1746 | { | |
1747 | acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block); | |
1748 | acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block); | |
1749 | acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block); | |
1750 | acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block); | |
1751 | ||
1752 | return AE_OK; | |
1753 | } | |
1754 | ||
32d47eef | 1755 | acpi_status __init acpi_os_initialize1(void) |
d362edaf | 1756 | { |
44d2588e TH |
1757 | kacpid_wq = alloc_workqueue("kacpid", 0, 1); |
1758 | kacpi_notify_wq = alloc_workqueue("kacpi_notify", 0, 1); | |
1759 | kacpi_hotplug_wq = alloc_workqueue("kacpi_hotplug", 0, 1); | |
d362edaf MS |
1760 | BUG_ON(!kacpid_wq); |
1761 | BUG_ON(!kacpi_notify_wq); | |
1762 | BUG_ON(!kacpi_hotplug_wq); | |
1bd64d42 LB |
1763 | acpi_install_interface_handler(acpi_osi_handler); |
1764 | acpi_osi_setup_late(); | |
d362edaf MS |
1765 | return AE_OK; |
1766 | } | |
1767 | ||
1768 | acpi_status acpi_os_terminate(void) | |
1769 | { | |
1770 | if (acpi_irq_handler) { | |
23fe3630 | 1771 | acpi_os_remove_interrupt_handler(acpi_gbl_FADT.sci_interrupt, |
d362edaf MS |
1772 | acpi_irq_handler); |
1773 | } | |
1774 | ||
1775 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe1_block); | |
1776 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block); | |
1777 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block); | |
1778 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block); | |
1779 | ||
1780 | destroy_workqueue(kacpid_wq); | |
1781 | destroy_workqueue(kacpi_notify_wq); | |
1782 | destroy_workqueue(kacpi_hotplug_wq); | |
1783 | ||
1784 | return AE_OK; | |
1785 | } | |
09f98a82 TL |
1786 | |
1787 | acpi_status acpi_os_prepare_sleep(u8 sleep_state, u32 pm1a_control, | |
1788 | u32 pm1b_control) | |
1789 | { | |
1790 | int rc = 0; | |
1791 | if (__acpi_os_prepare_sleep) | |
1792 | rc = __acpi_os_prepare_sleep(sleep_state, | |
1793 | pm1a_control, pm1b_control); | |
1794 | if (rc < 0) | |
1795 | return AE_ERROR; | |
1796 | else if (rc > 0) | |
1797 | return AE_CTRL_SKIP; | |
1798 | ||
1799 | return AE_OK; | |
1800 | } | |
1801 | ||
1802 | void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state, | |
1803 | u32 pm1a_ctrl, u32 pm1b_ctrl)) | |
1804 | { | |
1805 | __acpi_os_prepare_sleep = func; | |
1806 | } | |
92d8aff3 | 1807 | |
d6b47b12 BG |
1808 | acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state, u32 val_a, |
1809 | u32 val_b) | |
1810 | { | |
1811 | int rc = 0; | |
1812 | if (__acpi_os_prepare_extended_sleep) | |
1813 | rc = __acpi_os_prepare_extended_sleep(sleep_state, | |
1814 | val_a, val_b); | |
1815 | if (rc < 0) | |
1816 | return AE_ERROR; | |
1817 | else if (rc > 0) | |
1818 | return AE_CTRL_SKIP; | |
1819 | ||
1820 | return AE_OK; | |
1821 | } | |
1822 | ||
1823 | void acpi_os_set_prepare_extended_sleep(int (*func)(u8 sleep_state, | |
1824 | u32 val_a, u32 val_b)) | |
1825 | { | |
1826 | __acpi_os_prepare_extended_sleep = func; | |
1827 | } | |
1828 | ||
1829 | ||
92d8aff3 YL |
1830 | void alloc_acpi_hp_work(acpi_handle handle, u32 type, void *context, |
1831 | void (*func)(struct work_struct *work)) | |
1832 | { | |
1833 | struct acpi_hp_work *hp_work; | |
1834 | int ret; | |
1835 | ||
1836 | hp_work = kmalloc(sizeof(*hp_work), GFP_KERNEL); | |
1837 | if (!hp_work) | |
1838 | return; | |
1839 | ||
1840 | hp_work->handle = handle; | |
1841 | hp_work->type = type; | |
1842 | hp_work->context = context; | |
1843 | ||
1844 | INIT_WORK(&hp_work->work, func); | |
1845 | ret = queue_work(kacpi_hotplug_wq, &hp_work->work); | |
1846 | if (!ret) | |
1847 | kfree(hp_work); | |
1848 | } | |
1849 | EXPORT_SYMBOL_GPL(alloc_acpi_hp_work); |