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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> | |
1da177e4 | 55 | |
1da177e4 | 56 | #define _COMPONENT ACPI_OS_SERVICES |
f52fd66d | 57 | ACPI_MODULE_NAME("osl"); |
1da177e4 | 58 | #define PREFIX "ACPI: " |
4be44fcd LB |
59 | struct acpi_os_dpc { |
60 | acpi_osd_exec_callback function; | |
61 | void *context; | |
65f27f38 | 62 | struct work_struct work; |
9ac61856 | 63 | int wait; |
1da177e4 LT |
64 | }; |
65 | ||
66 | #ifdef CONFIG_ACPI_CUSTOM_DSDT | |
67 | #include CONFIG_ACPI_CUSTOM_DSDT_FILE | |
68 | #endif | |
69 | ||
70 | #ifdef ENABLE_DEBUGGER | |
71 | #include <linux/kdb.h> | |
72 | ||
73 | /* stuff for debugger support */ | |
74 | int acpi_in_debugger; | |
75 | EXPORT_SYMBOL(acpi_in_debugger); | |
76 | ||
77 | extern char line_buf[80]; | |
4be44fcd | 78 | #endif /*ENABLE_DEBUGGER */ |
1da177e4 | 79 | |
09f98a82 TL |
80 | static int (*__acpi_os_prepare_sleep)(u8 sleep_state, u32 pm1a_ctrl, |
81 | u32 pm1b_ctrl); | |
82 | ||
1da177e4 LT |
83 | static acpi_osd_handler acpi_irq_handler; |
84 | static void *acpi_irq_context; | |
85 | static struct workqueue_struct *kacpid_wq; | |
88db5e14 | 86 | static struct workqueue_struct *kacpi_notify_wq; |
6af8bef1 PB |
87 | struct workqueue_struct *kacpi_hotplug_wq; |
88 | EXPORT_SYMBOL(kacpi_hotplug_wq); | |
1da177e4 | 89 | |
620242ae MS |
90 | /* |
91 | * This list of permanent mappings is for memory that may be accessed from | |
92 | * interrupt context, where we can't do the ioremap(). | |
93 | */ | |
94 | struct acpi_ioremap { | |
95 | struct list_head list; | |
96 | void __iomem *virt; | |
97 | acpi_physical_address phys; | |
98 | acpi_size size; | |
b7c1fadd | 99 | unsigned long refcount; |
620242ae MS |
100 | }; |
101 | ||
102 | static LIST_HEAD(acpi_ioremaps); | |
7bbb8903 | 103 | static DEFINE_MUTEX(acpi_ioremap_lock); |
620242ae | 104 | |
b0ed7a91 | 105 | static void __init acpi_osi_setup_late(void); |
ae00d812 | 106 | |
d4b7dc49 | 107 | /* |
a6e0887f | 108 | * The story of _OSI(Linux) |
d4b7dc49 | 109 | * |
a6e0887f LB |
110 | * From pre-history through Linux-2.6.22, |
111 | * Linux responded TRUE upon a BIOS OSI(Linux) query. | |
d4b7dc49 | 112 | * |
a6e0887f LB |
113 | * Unfortunately, reference BIOS writers got wind of this |
114 | * and put OSI(Linux) in their example code, quickly exposing | |
115 | * this string as ill-conceived and opening the door to | |
116 | * an un-bounded number of BIOS incompatibilities. | |
d4b7dc49 | 117 | * |
a6e0887f LB |
118 | * For example, OSI(Linux) was used on resume to re-POST a |
119 | * video card on one system, because Linux at that time | |
120 | * could not do a speedy restore in its native driver. | |
121 | * But then upon gaining quick native restore capability, | |
122 | * Linux has no way to tell the BIOS to skip the time-consuming | |
123 | * POST -- putting Linux at a permanent performance disadvantage. | |
124 | * On another system, the BIOS writer used OSI(Linux) | |
125 | * to infer native OS support for IPMI! On other systems, | |
126 | * OSI(Linux) simply got in the way of Linux claiming to | |
127 | * be compatible with other operating systems, exposing | |
128 | * BIOS issues such as skipped device initialization. | |
d4b7dc49 | 129 | * |
a6e0887f LB |
130 | * So "Linux" turned out to be a really poor chose of |
131 | * OSI string, and from Linux-2.6.23 onward we respond FALSE. | |
d4b7dc49 LB |
132 | * |
133 | * BIOS writers should NOT query _OSI(Linux) on future systems. | |
a6e0887f LB |
134 | * Linux will complain on the console when it sees it, and return FALSE. |
135 | * To get Linux to return TRUE for your system will require | |
136 | * a kernel source update to add a DMI entry, | |
137 | * or boot with "acpi_osi=Linux" | |
d4b7dc49 | 138 | */ |
d4b7dc49 | 139 | |
1d15d84e | 140 | static struct osi_linux { |
d4b7dc49 LB |
141 | unsigned int enable:1; |
142 | unsigned int dmi:1; | |
143 | unsigned int cmdline:1; | |
d90aa92c | 144 | } osi_linux = {0, 0, 0}; |
f507654d | 145 | |
b0ed7a91 LM |
146 | static u32 acpi_osi_handler(acpi_string interface, u32 supported) |
147 | { | |
148 | if (!strcmp("Linux", interface)) { | |
149 | ||
8997621b | 150 | printk_once(KERN_NOTICE FW_BUG PREFIX |
b0ed7a91 LM |
151 | "BIOS _OSI(Linux) query %s%s\n", |
152 | osi_linux.enable ? "honored" : "ignored", | |
153 | osi_linux.cmdline ? " via cmdline" : | |
154 | osi_linux.dmi ? " via DMI" : ""); | |
155 | } | |
156 | ||
157 | return supported; | |
158 | } | |
159 | ||
bc9ffce2 | 160 | static void __init acpi_request_region (struct acpi_generic_address *gas, |
9a47cdb1 BH |
161 | unsigned int length, char *desc) |
162 | { | |
bc9ffce2 MS |
163 | u64 addr; |
164 | ||
165 | /* Handle possible alignment issues */ | |
166 | memcpy(&addr, &gas->address, sizeof(addr)); | |
167 | if (!addr || !length) | |
9a47cdb1 BH |
168 | return; |
169 | ||
cfa806f0 | 170 | /* Resources are never freed */ |
bc9ffce2 MS |
171 | if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_IO) |
172 | request_region(addr, length, desc); | |
173 | else if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) | |
174 | request_mem_region(addr, length, desc); | |
9a47cdb1 BH |
175 | } |
176 | ||
177 | static int __init acpi_reserve_resources(void) | |
178 | { | |
eee3c859 | 179 | acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
180 | "ACPI PM1a_EVT_BLK"); |
181 | ||
eee3c859 | 182 | acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
183 | "ACPI PM1b_EVT_BLK"); |
184 | ||
eee3c859 | 185 | acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
186 | "ACPI PM1a_CNT_BLK"); |
187 | ||
eee3c859 | 188 | acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
189 | "ACPI PM1b_CNT_BLK"); |
190 | ||
eee3c859 LB |
191 | if (acpi_gbl_FADT.pm_timer_length == 4) |
192 | acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR"); | |
9a47cdb1 | 193 | |
eee3c859 | 194 | acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length, |
9a47cdb1 BH |
195 | "ACPI PM2_CNT_BLK"); |
196 | ||
197 | /* Length of GPE blocks must be a non-negative multiple of 2 */ | |
198 | ||
eee3c859 LB |
199 | if (!(acpi_gbl_FADT.gpe0_block_length & 0x1)) |
200 | acpi_request_region(&acpi_gbl_FADT.xgpe0_block, | |
201 | acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK"); | |
9a47cdb1 | 202 | |
eee3c859 LB |
203 | if (!(acpi_gbl_FADT.gpe1_block_length & 0x1)) |
204 | acpi_request_region(&acpi_gbl_FADT.xgpe1_block, | |
205 | acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK"); | |
9a47cdb1 BH |
206 | |
207 | return 0; | |
208 | } | |
209 | device_initcall(acpi_reserve_resources); | |
210 | ||
4be44fcd | 211 | void acpi_os_printf(const char *fmt, ...) |
1da177e4 LT |
212 | { |
213 | va_list args; | |
214 | va_start(args, fmt); | |
215 | acpi_os_vprintf(fmt, args); | |
216 | va_end(args); | |
217 | } | |
4be44fcd | 218 | |
4be44fcd | 219 | void acpi_os_vprintf(const char *fmt, va_list args) |
1da177e4 LT |
220 | { |
221 | static char buffer[512]; | |
4be44fcd | 222 | |
1da177e4 LT |
223 | vsprintf(buffer, fmt, args); |
224 | ||
225 | #ifdef ENABLE_DEBUGGER | |
226 | if (acpi_in_debugger) { | |
227 | kdb_printf("%s", buffer); | |
228 | } else { | |
4d939155 | 229 | printk(KERN_CONT "%s", buffer); |
1da177e4 LT |
230 | } |
231 | #else | |
4d939155 | 232 | printk(KERN_CONT "%s", buffer); |
1da177e4 LT |
233 | #endif |
234 | } | |
235 | ||
4996c023 TI |
236 | #ifdef CONFIG_KEXEC |
237 | static unsigned long acpi_rsdp; | |
238 | static int __init setup_acpi_rsdp(char *arg) | |
239 | { | |
240 | acpi_rsdp = simple_strtoul(arg, NULL, 16); | |
241 | return 0; | |
242 | } | |
243 | early_param("acpi_rsdp", setup_acpi_rsdp); | |
244 | #endif | |
245 | ||
ad71860a | 246 | acpi_physical_address __init acpi_os_get_root_pointer(void) |
1da177e4 | 247 | { |
4996c023 TI |
248 | #ifdef CONFIG_KEXEC |
249 | if (acpi_rsdp) | |
250 | return acpi_rsdp; | |
251 | #endif | |
252 | ||
1da177e4 | 253 | if (efi_enabled) { |
b2c99e3c | 254 | if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) |
ad71860a | 255 | return efi.acpi20; |
b2c99e3c | 256 | else if (efi.acpi != EFI_INVALID_TABLE_ADDR) |
ad71860a | 257 | return efi.acpi; |
1da177e4 | 258 | else { |
4be44fcd LB |
259 | printk(KERN_ERR PREFIX |
260 | "System description tables not found\n"); | |
ad71860a | 261 | return 0; |
1da177e4 | 262 | } |
239665a3 LB |
263 | } else { |
264 | acpi_physical_address pa = 0; | |
265 | ||
266 | acpi_find_root_pointer(&pa); | |
267 | return pa; | |
268 | } | |
1da177e4 LT |
269 | } |
270 | ||
78cdb3ed | 271 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ |
4a3cba5e MS |
272 | static struct acpi_ioremap * |
273 | acpi_map_lookup(acpi_physical_address phys, acpi_size size) | |
620242ae MS |
274 | { |
275 | struct acpi_ioremap *map; | |
276 | ||
78cdb3ed | 277 | list_for_each_entry_rcu(map, &acpi_ioremaps, list) |
620242ae MS |
278 | if (map->phys <= phys && |
279 | phys + size <= map->phys + map->size) | |
4a3cba5e MS |
280 | return map; |
281 | ||
282 | return NULL; | |
283 | } | |
284 | ||
285 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ | |
286 | static void __iomem * | |
287 | acpi_map_vaddr_lookup(acpi_physical_address phys, unsigned int size) | |
288 | { | |
289 | struct acpi_ioremap *map; | |
290 | ||
291 | map = acpi_map_lookup(phys, size); | |
292 | if (map) | |
293 | return map->virt + (phys - map->phys); | |
620242ae MS |
294 | |
295 | return NULL; | |
296 | } | |
297 | ||
13606a2d RW |
298 | void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size) |
299 | { | |
300 | struct acpi_ioremap *map; | |
301 | void __iomem *virt = NULL; | |
302 | ||
303 | mutex_lock(&acpi_ioremap_lock); | |
304 | map = acpi_map_lookup(phys, size); | |
305 | if (map) { | |
306 | virt = map->virt + (phys - map->phys); | |
307 | map->refcount++; | |
308 | } | |
309 | mutex_unlock(&acpi_ioremap_lock); | |
310 | return virt; | |
311 | } | |
312 | EXPORT_SYMBOL_GPL(acpi_os_get_iomem); | |
313 | ||
78cdb3ed | 314 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ |
620242ae MS |
315 | static struct acpi_ioremap * |
316 | acpi_map_lookup_virt(void __iomem *virt, acpi_size size) | |
317 | { | |
318 | struct acpi_ioremap *map; | |
319 | ||
78cdb3ed | 320 | list_for_each_entry_rcu(map, &acpi_ioremaps, list) |
4a3cba5e MS |
321 | if (map->virt <= virt && |
322 | virt + size <= map->virt + map->size) | |
620242ae MS |
323 | return map; |
324 | ||
325 | return NULL; | |
326 | } | |
327 | ||
ba242d5b MS |
328 | #ifndef CONFIG_IA64 |
329 | #define should_use_kmap(pfn) page_is_ram(pfn) | |
330 | #else | |
331 | /* ioremap will take care of cache attributes */ | |
332 | #define should_use_kmap(pfn) 0 | |
333 | #endif | |
334 | ||
335 | static void __iomem *acpi_map(acpi_physical_address pg_off, unsigned long pg_sz) | |
336 | { | |
337 | unsigned long pfn; | |
338 | ||
339 | pfn = pg_off >> PAGE_SHIFT; | |
340 | if (should_use_kmap(pfn)) { | |
341 | if (pg_sz > PAGE_SIZE) | |
342 | return NULL; | |
343 | return (void __iomem __force *)kmap(pfn_to_page(pfn)); | |
344 | } else | |
345 | return acpi_os_ioremap(pg_off, pg_sz); | |
346 | } | |
347 | ||
348 | static void acpi_unmap(acpi_physical_address pg_off, void __iomem *vaddr) | |
349 | { | |
350 | unsigned long pfn; | |
351 | ||
352 | pfn = pg_off >> PAGE_SHIFT; | |
e252675f | 353 | if (should_use_kmap(pfn)) |
ba242d5b MS |
354 | kunmap(pfn_to_page(pfn)); |
355 | else | |
356 | iounmap(vaddr); | |
357 | } | |
358 | ||
2fdf0741 JB |
359 | void __iomem *__init_refok |
360 | acpi_os_map_memory(acpi_physical_address phys, acpi_size size) | |
1da177e4 | 361 | { |
7ffd0443 | 362 | struct acpi_ioremap *map; |
620242ae | 363 | void __iomem *virt; |
2d6d9fd3 RW |
364 | acpi_physical_address pg_off; |
365 | acpi_size pg_sz; | |
620242ae | 366 | |
9f4fd61f BH |
367 | if (phys > ULONG_MAX) { |
368 | printk(KERN_ERR PREFIX "Cannot map memory that high\n"); | |
70c0846e | 369 | return NULL; |
1da177e4 | 370 | } |
620242ae MS |
371 | |
372 | if (!acpi_gbl_permanent_mmap) | |
ad71860a | 373 | return __acpi_map_table((unsigned long)phys, size); |
620242ae | 374 | |
7ffd0443 RW |
375 | mutex_lock(&acpi_ioremap_lock); |
376 | /* Check if there's a suitable mapping already. */ | |
377 | map = acpi_map_lookup(phys, size); | |
378 | if (map) { | |
b7c1fadd | 379 | map->refcount++; |
7ffd0443 RW |
380 | goto out; |
381 | } | |
382 | ||
620242ae | 383 | map = kzalloc(sizeof(*map), GFP_KERNEL); |
7ffd0443 RW |
384 | if (!map) { |
385 | mutex_unlock(&acpi_ioremap_lock); | |
620242ae | 386 | return NULL; |
7ffd0443 | 387 | } |
620242ae | 388 | |
4a3cba5e MS |
389 | pg_off = round_down(phys, PAGE_SIZE); |
390 | pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off; | |
ba242d5b | 391 | virt = acpi_map(pg_off, pg_sz); |
620242ae | 392 | if (!virt) { |
7ffd0443 | 393 | mutex_unlock(&acpi_ioremap_lock); |
620242ae MS |
394 | kfree(map); |
395 | return NULL; | |
396 | } | |
397 | ||
398 | INIT_LIST_HEAD(&map->list); | |
399 | map->virt = virt; | |
4a3cba5e MS |
400 | map->phys = pg_off; |
401 | map->size = pg_sz; | |
b7c1fadd | 402 | map->refcount = 1; |
620242ae | 403 | |
78cdb3ed | 404 | list_add_tail_rcu(&map->list, &acpi_ioremaps); |
620242ae | 405 | |
7ffd0443 RW |
406 | out: |
407 | mutex_unlock(&acpi_ioremap_lock); | |
4a3cba5e | 408 | return map->virt + (phys - map->phys); |
1da177e4 | 409 | } |
55a82ab3 | 410 | EXPORT_SYMBOL_GPL(acpi_os_map_memory); |
1da177e4 | 411 | |
b7c1fadd | 412 | static void acpi_os_drop_map_ref(struct acpi_ioremap *map) |
4a3cba5e | 413 | { |
b7c1fadd RW |
414 | if (!--map->refcount) |
415 | list_del_rcu(&map->list); | |
4a3cba5e | 416 | } |
4a3cba5e | 417 | |
b7c1fadd | 418 | static void acpi_os_map_cleanup(struct acpi_ioremap *map) |
7fe135dc | 419 | { |
b7c1fadd RW |
420 | if (!map->refcount) { |
421 | synchronize_rcu(); | |
ba242d5b | 422 | acpi_unmap(map->phys, map->virt); |
b7c1fadd RW |
423 | kfree(map); |
424 | } | |
4a3cba5e MS |
425 | } |
426 | ||
0d3a9cf5 | 427 | void __ref acpi_os_unmap_memory(void __iomem *virt, acpi_size size) |
1da177e4 | 428 | { |
620242ae | 429 | struct acpi_ioremap *map; |
620242ae MS |
430 | |
431 | if (!acpi_gbl_permanent_mmap) { | |
7d97277b | 432 | __acpi_unmap_table(virt, size); |
620242ae MS |
433 | return; |
434 | } | |
435 | ||
7bbb8903 | 436 | mutex_lock(&acpi_ioremap_lock); |
620242ae MS |
437 | map = acpi_map_lookup_virt(virt, size); |
438 | if (!map) { | |
7bbb8903 | 439 | mutex_unlock(&acpi_ioremap_lock); |
7fe135dc | 440 | WARN(true, PREFIX "%s: bad address %p\n", __func__, virt); |
620242ae MS |
441 | return; |
442 | } | |
b7c1fadd | 443 | acpi_os_drop_map_ref(map); |
7bbb8903 | 444 | mutex_unlock(&acpi_ioremap_lock); |
620242ae | 445 | |
b7c1fadd | 446 | acpi_os_map_cleanup(map); |
1da177e4 | 447 | } |
55a82ab3 | 448 | EXPORT_SYMBOL_GPL(acpi_os_unmap_memory); |
1da177e4 | 449 | |
0d3a9cf5 | 450 | void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size) |
7d97277b YL |
451 | { |
452 | if (!acpi_gbl_permanent_mmap) | |
453 | __acpi_unmap_table(virt, size); | |
454 | } | |
455 | ||
6f68c91c | 456 | int acpi_os_map_generic_address(struct acpi_generic_address *gas) |
29718521 | 457 | { |
bc9ffce2 | 458 | u64 addr; |
29718521 MS |
459 | void __iomem *virt; |
460 | ||
bc9ffce2 | 461 | if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) |
29718521 MS |
462 | return 0; |
463 | ||
bc9ffce2 MS |
464 | /* Handle possible alignment issues */ |
465 | memcpy(&addr, &gas->address, sizeof(addr)); | |
466 | if (!addr || !gas->bit_width) | |
29718521 MS |
467 | return -EINVAL; |
468 | ||
bc9ffce2 | 469 | virt = acpi_os_map_memory(addr, gas->bit_width / 8); |
29718521 MS |
470 | if (!virt) |
471 | return -EIO; | |
472 | ||
473 | return 0; | |
474 | } | |
6f68c91c | 475 | EXPORT_SYMBOL(acpi_os_map_generic_address); |
29718521 | 476 | |
6f68c91c | 477 | void acpi_os_unmap_generic_address(struct acpi_generic_address *gas) |
29718521 | 478 | { |
bc9ffce2 | 479 | u64 addr; |
7fe135dc | 480 | struct acpi_ioremap *map; |
29718521 | 481 | |
bc9ffce2 | 482 | if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) |
29718521 MS |
483 | return; |
484 | ||
bc9ffce2 MS |
485 | /* Handle possible alignment issues */ |
486 | memcpy(&addr, &gas->address, sizeof(addr)); | |
487 | if (!addr || !gas->bit_width) | |
29718521 MS |
488 | return; |
489 | ||
7bbb8903 | 490 | mutex_lock(&acpi_ioremap_lock); |
bc9ffce2 | 491 | map = acpi_map_lookup(addr, gas->bit_width / 8); |
7fe135dc RW |
492 | if (!map) { |
493 | mutex_unlock(&acpi_ioremap_lock); | |
494 | return; | |
495 | } | |
b7c1fadd | 496 | acpi_os_drop_map_ref(map); |
7bbb8903 | 497 | mutex_unlock(&acpi_ioremap_lock); |
29718521 | 498 | |
b7c1fadd | 499 | acpi_os_map_cleanup(map); |
29718521 | 500 | } |
6f68c91c | 501 | EXPORT_SYMBOL(acpi_os_unmap_generic_address); |
29718521 | 502 | |
1da177e4 LT |
503 | #ifdef ACPI_FUTURE_USAGE |
504 | acpi_status | |
4be44fcd | 505 | acpi_os_get_physical_address(void *virt, acpi_physical_address * phys) |
1da177e4 | 506 | { |
4be44fcd | 507 | if (!phys || !virt) |
1da177e4 LT |
508 | return AE_BAD_PARAMETER; |
509 | ||
510 | *phys = virt_to_phys(virt); | |
511 | ||
512 | return AE_OK; | |
513 | } | |
514 | #endif | |
515 | ||
516 | #define ACPI_MAX_OVERRIDE_LEN 100 | |
517 | ||
518 | static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN]; | |
519 | ||
520 | acpi_status | |
4be44fcd LB |
521 | acpi_os_predefined_override(const struct acpi_predefined_names *init_val, |
522 | acpi_string * new_val) | |
1da177e4 LT |
523 | { |
524 | if (!init_val || !new_val) | |
525 | return AE_BAD_PARAMETER; | |
526 | ||
527 | *new_val = NULL; | |
4be44fcd | 528 | if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) { |
1da177e4 | 529 | printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n", |
4be44fcd | 530 | acpi_os_name); |
1da177e4 LT |
531 | *new_val = acpi_os_name; |
532 | } | |
533 | ||
534 | return AE_OK; | |
535 | } | |
536 | ||
53aac44c TR |
537 | #ifdef CONFIG_ACPI_INITRD_TABLE_OVERRIDE |
538 | #include <linux/earlycpio.h> | |
539 | #include <linux/memblock.h> | |
540 | ||
541 | static u64 acpi_tables_addr; | |
542 | static int all_tables_size; | |
543 | ||
544 | /* Copied from acpica/tbutils.c:acpi_tb_checksum() */ | |
545 | u8 __init acpi_table_checksum(u8 *buffer, u32 length) | |
546 | { | |
547 | u8 sum = 0; | |
548 | u8 *end = buffer + length; | |
549 | ||
550 | while (buffer < end) | |
551 | sum = (u8) (sum + *(buffer++)); | |
552 | return sum; | |
553 | } | |
554 | ||
555 | /* All but ACPI_SIG_RSDP and ACPI_SIG_FACS: */ | |
556 | static const char * const table_sigs[] = { | |
557 | ACPI_SIG_BERT, ACPI_SIG_CPEP, ACPI_SIG_ECDT, ACPI_SIG_EINJ, | |
558 | ACPI_SIG_ERST, ACPI_SIG_HEST, ACPI_SIG_MADT, ACPI_SIG_MSCT, | |
559 | ACPI_SIG_SBST, ACPI_SIG_SLIT, ACPI_SIG_SRAT, ACPI_SIG_ASF, | |
560 | ACPI_SIG_BOOT, ACPI_SIG_DBGP, ACPI_SIG_DMAR, ACPI_SIG_HPET, | |
561 | ACPI_SIG_IBFT, ACPI_SIG_IVRS, ACPI_SIG_MCFG, ACPI_SIG_MCHI, | |
562 | ACPI_SIG_SLIC, ACPI_SIG_SPCR, ACPI_SIG_SPMI, ACPI_SIG_TCPA, | |
563 | ACPI_SIG_UEFI, ACPI_SIG_WAET, ACPI_SIG_WDAT, ACPI_SIG_WDDT, | |
564 | ACPI_SIG_WDRT, ACPI_SIG_DSDT, ACPI_SIG_FADT, ACPI_SIG_PSDT, | |
565 | ACPI_SIG_RSDT, ACPI_SIG_XSDT, ACPI_SIG_SSDT, NULL }; | |
566 | ||
567 | /* Non-fatal errors: Affected tables/files are ignored */ | |
568 | #define INVALID_TABLE(x, path, name) \ | |
569 | { pr_err("ACPI OVERRIDE: " x " [%s%s]\n", path, name); continue; } | |
570 | ||
571 | #define ACPI_HEADER_SIZE sizeof(struct acpi_table_header) | |
572 | ||
573 | /* Must not increase 10 or needs code modification below */ | |
574 | #define ACPI_OVERRIDE_TABLES 10 | |
575 | ||
576 | void __init acpi_initrd_override(void *data, size_t size) | |
577 | { | |
578 | int sig, no, table_nr = 0, total_offset = 0; | |
579 | long offset = 0; | |
580 | struct acpi_table_header *table; | |
581 | char cpio_path[32] = "kernel/firmware/acpi/"; | |
582 | struct cpio_data file; | |
583 | struct cpio_data early_initrd_files[ACPI_OVERRIDE_TABLES]; | |
584 | char *p; | |
585 | ||
586 | if (data == NULL || size == 0) | |
587 | return; | |
588 | ||
589 | for (no = 0; no < ACPI_OVERRIDE_TABLES; no++) { | |
590 | file = find_cpio_data(cpio_path, data, size, &offset); | |
591 | if (!file.data) | |
592 | break; | |
593 | ||
594 | data += offset; | |
595 | size -= offset; | |
596 | ||
597 | if (file.size < sizeof(struct acpi_table_header)) | |
598 | INVALID_TABLE("Table smaller than ACPI header", | |
599 | cpio_path, file.name); | |
600 | ||
601 | table = file.data; | |
602 | ||
603 | for (sig = 0; table_sigs[sig]; sig++) | |
604 | if (!memcmp(table->signature, table_sigs[sig], 4)) | |
605 | break; | |
606 | ||
607 | if (!table_sigs[sig]) | |
608 | INVALID_TABLE("Unknown signature", | |
609 | cpio_path, file.name); | |
610 | if (file.size != table->length) | |
611 | INVALID_TABLE("File length does not match table length", | |
612 | cpio_path, file.name); | |
613 | if (acpi_table_checksum(file.data, table->length)) | |
614 | INVALID_TABLE("Bad table checksum", | |
615 | cpio_path, file.name); | |
616 | ||
617 | pr_info("%4.4s ACPI table found in initrd [%s%s][0x%x]\n", | |
618 | table->signature, cpio_path, file.name, table->length); | |
619 | ||
620 | all_tables_size += table->length; | |
621 | early_initrd_files[table_nr].data = file.data; | |
622 | early_initrd_files[table_nr].size = file.size; | |
623 | table_nr++; | |
624 | } | |
625 | if (table_nr == 0) | |
626 | return; | |
627 | ||
628 | acpi_tables_addr = | |
629 | memblock_find_in_range(0, max_low_pfn_mapped << PAGE_SHIFT, | |
630 | all_tables_size, PAGE_SIZE); | |
631 | if (!acpi_tables_addr) { | |
632 | WARN_ON(1); | |
633 | return; | |
634 | } | |
635 | /* | |
636 | * Only calling e820_add_reserve does not work and the | |
637 | * tables are invalid (memory got used) later. | |
638 | * memblock_reserve works as expected and the tables won't get modified. | |
639 | * But it's not enough on X86 because ioremap will | |
640 | * complain later (used by acpi_os_map_memory) that the pages | |
641 | * that should get mapped are not marked "reserved". | |
642 | * Both memblock_reserve and e820_add_region (via arch_reserve_mem_area) | |
643 | * works fine. | |
644 | */ | |
645 | memblock_reserve(acpi_tables_addr, acpi_tables_addr + all_tables_size); | |
646 | arch_reserve_mem_area(acpi_tables_addr, all_tables_size); | |
647 | ||
648 | p = early_ioremap(acpi_tables_addr, all_tables_size); | |
649 | ||
650 | for (no = 0; no < table_nr; no++) { | |
651 | memcpy(p + total_offset, early_initrd_files[no].data, | |
652 | early_initrd_files[no].size); | |
653 | total_offset += early_initrd_files[no].size; | |
654 | } | |
655 | early_iounmap(p, all_tables_size); | |
656 | } | |
657 | #endif /* CONFIG_ACPI_INITRD_TABLE_OVERRIDE */ | |
658 | ||
325a8d36 TR |
659 | static void acpi_table_taint(struct acpi_table_header *table) |
660 | { | |
661 | pr_warn(PREFIX | |
662 | "Override [%4.4s-%8.8s], this is unsafe: tainting kernel\n", | |
663 | table->signature, table->oem_table_id); | |
664 | add_taint(TAINT_OVERRIDDEN_ACPI_TABLE); | |
665 | } | |
666 | ||
667 | ||
1da177e4 | 668 | acpi_status |
4be44fcd LB |
669 | acpi_os_table_override(struct acpi_table_header * existing_table, |
670 | struct acpi_table_header ** new_table) | |
1da177e4 LT |
671 | { |
672 | if (!existing_table || !new_table) | |
673 | return AE_BAD_PARAMETER; | |
674 | ||
71fc47a9 MG |
675 | *new_table = NULL; |
676 | ||
1da177e4 LT |
677 | #ifdef CONFIG_ACPI_CUSTOM_DSDT |
678 | if (strncmp(existing_table->signature, "DSDT", 4) == 0) | |
4be44fcd | 679 | *new_table = (struct acpi_table_header *)AmlCode; |
1da177e4 | 680 | #endif |
325a8d36 TR |
681 | if (*new_table != NULL) |
682 | acpi_table_taint(existing_table); | |
1da177e4 LT |
683 | return AE_OK; |
684 | } | |
685 | ||
f7b004a1 BM |
686 | acpi_status |
687 | acpi_os_physical_table_override(struct acpi_table_header *existing_table, | |
b2a35003 TR |
688 | acpi_physical_address *address, |
689 | u32 *table_length) | |
f7b004a1 | 690 | { |
b2a35003 TR |
691 | #ifndef CONFIG_ACPI_INITRD_TABLE_OVERRIDE |
692 | *table_length = 0; | |
693 | *address = 0; | |
694 | return AE_OK; | |
695 | #else | |
696 | int table_offset = 0; | |
697 | struct acpi_table_header *table; | |
698 | ||
699 | *table_length = 0; | |
700 | *address = 0; | |
701 | ||
702 | if (!acpi_tables_addr) | |
703 | return AE_OK; | |
704 | ||
705 | do { | |
706 | if (table_offset + ACPI_HEADER_SIZE > all_tables_size) { | |
707 | WARN_ON(1); | |
708 | return AE_OK; | |
709 | } | |
710 | ||
711 | table = acpi_os_map_memory(acpi_tables_addr + table_offset, | |
712 | ACPI_HEADER_SIZE); | |
f7b004a1 | 713 | |
b2a35003 TR |
714 | if (table_offset + table->length > all_tables_size) { |
715 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
716 | WARN_ON(1); | |
717 | return AE_OK; | |
718 | } | |
719 | ||
720 | table_offset += table->length; | |
721 | ||
722 | if (memcmp(existing_table->signature, table->signature, 4)) { | |
723 | acpi_os_unmap_memory(table, | |
724 | ACPI_HEADER_SIZE); | |
725 | continue; | |
726 | } | |
727 | ||
728 | /* Only override tables with matching oem id */ | |
729 | if (memcmp(table->oem_table_id, existing_table->oem_table_id, | |
730 | ACPI_OEM_TABLE_ID_SIZE)) { | |
731 | acpi_os_unmap_memory(table, | |
732 | ACPI_HEADER_SIZE); | |
733 | continue; | |
734 | } | |
735 | ||
736 | table_offset -= table->length; | |
737 | *table_length = table->length; | |
738 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
739 | *address = acpi_tables_addr + table_offset; | |
740 | break; | |
741 | } while (table_offset + ACPI_HEADER_SIZE < all_tables_size); | |
f7b004a1 | 742 | |
325a8d36 TR |
743 | if (*address != 0) |
744 | acpi_table_taint(existing_table); | |
b2a35003 TR |
745 | return AE_OK; |
746 | #endif | |
747 | } | |
f7b004a1 | 748 | |
7d12e780 | 749 | static irqreturn_t acpi_irq(int irq, void *dev_id) |
1da177e4 | 750 | { |
5229e87d LB |
751 | u32 handled; |
752 | ||
753 | handled = (*acpi_irq_handler) (acpi_irq_context); | |
754 | ||
755 | if (handled) { | |
756 | acpi_irq_handled++; | |
757 | return IRQ_HANDLED; | |
88bea188 LB |
758 | } else { |
759 | acpi_irq_not_handled++; | |
5229e87d | 760 | return IRQ_NONE; |
88bea188 | 761 | } |
1da177e4 LT |
762 | } |
763 | ||
764 | acpi_status | |
4be44fcd LB |
765 | acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler, |
766 | void *context) | |
1da177e4 LT |
767 | { |
768 | unsigned int irq; | |
769 | ||
5229e87d LB |
770 | acpi_irq_stats_init(); |
771 | ||
1da177e4 | 772 | /* |
23fe3630 RW |
773 | * ACPI interrupts different from the SCI in our copy of the FADT are |
774 | * not supported. | |
1da177e4 | 775 | */ |
23fe3630 RW |
776 | if (gsi != acpi_gbl_FADT.sci_interrupt) |
777 | return AE_BAD_PARAMETER; | |
778 | ||
779 | if (acpi_irq_handler) | |
780 | return AE_ALREADY_ACQUIRED; | |
781 | ||
1da177e4 LT |
782 | if (acpi_gsi_to_irq(gsi, &irq) < 0) { |
783 | printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n", | |
784 | gsi); | |
785 | return AE_OK; | |
786 | } | |
787 | ||
788 | acpi_irq_handler = handler; | |
789 | acpi_irq_context = context; | |
9ecf8c0d | 790 | if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) { |
1da177e4 | 791 | printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq); |
23fe3630 | 792 | acpi_irq_handler = NULL; |
1da177e4 LT |
793 | return AE_NOT_ACQUIRED; |
794 | } | |
1da177e4 LT |
795 | |
796 | return AE_OK; | |
797 | } | |
798 | ||
4be44fcd | 799 | acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler) |
1da177e4 | 800 | { |
23fe3630 RW |
801 | if (irq != acpi_gbl_FADT.sci_interrupt) |
802 | return AE_BAD_PARAMETER; | |
803 | ||
804 | free_irq(irq, acpi_irq); | |
805 | acpi_irq_handler = NULL; | |
1da177e4 LT |
806 | |
807 | return AE_OK; | |
808 | } | |
809 | ||
810 | /* | |
811 | * Running in interpreter thread context, safe to sleep | |
812 | */ | |
813 | ||
439913ff | 814 | void acpi_os_sleep(u64 ms) |
1da177e4 | 815 | { |
01a527ec | 816 | schedule_timeout_interruptible(msecs_to_jiffies(ms)); |
1da177e4 | 817 | } |
4be44fcd | 818 | |
4be44fcd | 819 | void acpi_os_stall(u32 us) |
1da177e4 LT |
820 | { |
821 | while (us) { | |
822 | u32 delay = 1000; | |
823 | ||
824 | if (delay > us) | |
825 | delay = us; | |
826 | udelay(delay); | |
827 | touch_nmi_watchdog(); | |
828 | us -= delay; | |
829 | } | |
830 | } | |
4be44fcd | 831 | |
1da177e4 LT |
832 | /* |
833 | * Support ACPI 3.0 AML Timer operand | |
834 | * Returns 64-bit free-running, monotonically increasing timer | |
835 | * with 100ns granularity | |
836 | */ | |
4be44fcd | 837 | u64 acpi_os_get_timer(void) |
1da177e4 LT |
838 | { |
839 | static u64 t; | |
840 | ||
841 | #ifdef CONFIG_HPET | |
842 | /* TBD: use HPET if available */ | |
843 | #endif | |
844 | ||
845 | #ifdef CONFIG_X86_PM_TIMER | |
846 | /* TBD: default to PM timer if HPET was not available */ | |
847 | #endif | |
848 | if (!t) | |
849 | printk(KERN_ERR PREFIX "acpi_os_get_timer() TBD\n"); | |
850 | ||
851 | return ++t; | |
852 | } | |
853 | ||
4be44fcd | 854 | acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width) |
1da177e4 LT |
855 | { |
856 | u32 dummy; | |
857 | ||
858 | if (!value) | |
859 | value = &dummy; | |
860 | ||
49fbabf5 ZY |
861 | *value = 0; |
862 | if (width <= 8) { | |
4be44fcd | 863 | *(u8 *) value = inb(port); |
49fbabf5 | 864 | } else if (width <= 16) { |
4be44fcd | 865 | *(u16 *) value = inw(port); |
49fbabf5 | 866 | } else if (width <= 32) { |
4be44fcd | 867 | *(u32 *) value = inl(port); |
49fbabf5 | 868 | } else { |
1da177e4 LT |
869 | BUG(); |
870 | } | |
871 | ||
872 | return AE_OK; | |
873 | } | |
4be44fcd | 874 | |
1da177e4 LT |
875 | EXPORT_SYMBOL(acpi_os_read_port); |
876 | ||
4be44fcd | 877 | acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width) |
1da177e4 | 878 | { |
49fbabf5 | 879 | if (width <= 8) { |
1da177e4 | 880 | outb(value, port); |
49fbabf5 | 881 | } else if (width <= 16) { |
1da177e4 | 882 | outw(value, port); |
49fbabf5 | 883 | } else if (width <= 32) { |
1da177e4 | 884 | outl(value, port); |
49fbabf5 | 885 | } else { |
1da177e4 LT |
886 | BUG(); |
887 | } | |
888 | ||
889 | return AE_OK; | |
890 | } | |
4be44fcd | 891 | |
1da177e4 LT |
892 | EXPORT_SYMBOL(acpi_os_write_port); |
893 | ||
e615bf5b MS |
894 | #ifdef readq |
895 | static inline u64 read64(const volatile void __iomem *addr) | |
896 | { | |
897 | return readq(addr); | |
898 | } | |
899 | #else | |
900 | static inline u64 read64(const volatile void __iomem *addr) | |
901 | { | |
902 | u64 l, h; | |
903 | l = readl(addr); | |
904 | h = readl(addr+4); | |
905 | return l | (h << 32); | |
906 | } | |
907 | #endif | |
908 | ||
909 | acpi_status | |
653f4b53 | 910 | acpi_os_read_memory(acpi_physical_address phys_addr, u64 *value, u32 width) |
e615bf5b MS |
911 | { |
912 | void __iomem *virt_addr; | |
913 | unsigned int size = width / 8; | |
914 | bool unmap = false; | |
915 | u64 dummy; | |
916 | ||
917 | rcu_read_lock(); | |
918 | virt_addr = acpi_map_vaddr_lookup(phys_addr, size); | |
919 | if (!virt_addr) { | |
920 | rcu_read_unlock(); | |
921 | virt_addr = acpi_os_ioremap(phys_addr, size); | |
922 | if (!virt_addr) | |
923 | return AE_BAD_ADDRESS; | |
924 | unmap = true; | |
925 | } | |
926 | ||
927 | if (!value) | |
928 | value = &dummy; | |
929 | ||
930 | switch (width) { | |
931 | case 8: | |
932 | *(u8 *) value = readb(virt_addr); | |
933 | break; | |
934 | case 16: | |
935 | *(u16 *) value = readw(virt_addr); | |
936 | break; | |
937 | case 32: | |
938 | *(u32 *) value = readl(virt_addr); | |
939 | break; | |
940 | case 64: | |
941 | *(u64 *) value = read64(virt_addr); | |
942 | break; | |
943 | default: | |
944 | BUG(); | |
945 | } | |
946 | ||
947 | if (unmap) | |
948 | iounmap(virt_addr); | |
949 | else | |
950 | rcu_read_unlock(); | |
951 | ||
952 | return AE_OK; | |
953 | } | |
954 | ||
e615bf5b MS |
955 | #ifdef writeq |
956 | static inline void write64(u64 val, volatile void __iomem *addr) | |
957 | { | |
958 | writeq(val, addr); | |
959 | } | |
960 | #else | |
961 | static inline void write64(u64 val, volatile void __iomem *addr) | |
962 | { | |
963 | writel(val, addr); | |
964 | writel(val>>32, addr+4); | |
965 | } | |
966 | #endif | |
967 | ||
968 | acpi_status | |
653f4b53 | 969 | acpi_os_write_memory(acpi_physical_address phys_addr, u64 value, u32 width) |
e615bf5b MS |
970 | { |
971 | void __iomem *virt_addr; | |
972 | unsigned int size = width / 8; | |
973 | bool unmap = false; | |
974 | ||
975 | rcu_read_lock(); | |
976 | virt_addr = acpi_map_vaddr_lookup(phys_addr, size); | |
977 | if (!virt_addr) { | |
978 | rcu_read_unlock(); | |
979 | virt_addr = acpi_os_ioremap(phys_addr, size); | |
980 | if (!virt_addr) | |
981 | return AE_BAD_ADDRESS; | |
982 | unmap = true; | |
983 | } | |
984 | ||
985 | switch (width) { | |
986 | case 8: | |
987 | writeb(value, virt_addr); | |
988 | break; | |
989 | case 16: | |
990 | writew(value, virt_addr); | |
991 | break; | |
992 | case 32: | |
993 | writel(value, virt_addr); | |
994 | break; | |
995 | case 64: | |
996 | write64(value, virt_addr); | |
997 | break; | |
998 | default: | |
999 | BUG(); | |
1000 | } | |
1001 | ||
1002 | if (unmap) | |
1003 | iounmap(virt_addr); | |
1004 | else | |
1005 | rcu_read_unlock(); | |
1006 | ||
1007 | return AE_OK; | |
1008 | } | |
1009 | ||
1da177e4 | 1010 | acpi_status |
4be44fcd | 1011 | acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
c5f0231e | 1012 | u64 *value, u32 width) |
1da177e4 LT |
1013 | { |
1014 | int result, size; | |
c5f0231e | 1015 | u32 value32; |
1da177e4 LT |
1016 | |
1017 | if (!value) | |
1018 | return AE_BAD_PARAMETER; | |
1019 | ||
1020 | switch (width) { | |
1021 | case 8: | |
1022 | size = 1; | |
1023 | break; | |
1024 | case 16: | |
1025 | size = 2; | |
1026 | break; | |
1027 | case 32: | |
1028 | size = 4; | |
1029 | break; | |
1030 | default: | |
1031 | return AE_ERROR; | |
1032 | } | |
1033 | ||
b6ce068a MW |
1034 | result = raw_pci_read(pci_id->segment, pci_id->bus, |
1035 | PCI_DEVFN(pci_id->device, pci_id->function), | |
c5f0231e BM |
1036 | reg, size, &value32); |
1037 | *value = value32; | |
1da177e4 LT |
1038 | |
1039 | return (result ? AE_ERROR : AE_OK); | |
1040 | } | |
4be44fcd | 1041 | |
1da177e4 | 1042 | acpi_status |
4be44fcd | 1043 | acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
439913ff | 1044 | u64 value, u32 width) |
1da177e4 LT |
1045 | { |
1046 | int result, size; | |
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_write(pci_id->segment, pci_id->bus, |
1063 | PCI_DEVFN(pci_id->device, pci_id->function), | |
1064 | reg, size, value); | |
1da177e4 LT |
1065 | |
1066 | return (result ? AE_ERROR : AE_OK); | |
1067 | } | |
1068 | ||
65f27f38 | 1069 | static void acpi_os_execute_deferred(struct work_struct *work) |
88db5e14 AS |
1070 | { |
1071 | struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work); | |
88db5e14 | 1072 | |
9ac61856 | 1073 | if (dpc->wait) |
bd6f10a5 | 1074 | acpi_os_wait_events_complete(); |
19cd847a ZR |
1075 | |
1076 | dpc->function(dpc->context); | |
1077 | kfree(dpc); | |
19cd847a ZR |
1078 | } |
1079 | ||
b8d35192 AS |
1080 | /******************************************************************************* |
1081 | * | |
1082 | * FUNCTION: acpi_os_execute | |
1083 | * | |
1084 | * PARAMETERS: Type - Type of the callback | |
1085 | * Function - Function to be executed | |
1086 | * Context - Function parameters | |
1087 | * | |
1088 | * RETURN: Status | |
1089 | * | |
1090 | * DESCRIPTION: Depending on type, either queues function for deferred execution or | |
1091 | * immediately executes function on a separate thread. | |
1092 | * | |
1093 | ******************************************************************************/ | |
1094 | ||
19cd847a ZR |
1095 | static acpi_status __acpi_os_execute(acpi_execute_type type, |
1096 | acpi_osd_exec_callback function, void *context, int hp) | |
1da177e4 | 1097 | { |
4be44fcd LB |
1098 | acpi_status status = AE_OK; |
1099 | struct acpi_os_dpc *dpc; | |
17bc54ee | 1100 | struct workqueue_struct *queue; |
19cd847a | 1101 | int ret; |
72945b2b LB |
1102 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
1103 | "Scheduling function [%p(%p)] for deferred execution.\n", | |
1104 | function, context)); | |
1da177e4 | 1105 | |
1da177e4 LT |
1106 | /* |
1107 | * Allocate/initialize DPC structure. Note that this memory will be | |
65f27f38 | 1108 | * freed by the callee. The kernel handles the work_struct list in a |
1da177e4 LT |
1109 | * way that allows us to also free its memory inside the callee. |
1110 | * Because we may want to schedule several tasks with different | |
1111 | * parameters we can't use the approach some kernel code uses of | |
65f27f38 | 1112 | * having a static work_struct. |
1da177e4 | 1113 | */ |
72945b2b | 1114 | |
3ae45a27 | 1115 | dpc = kzalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC); |
1da177e4 | 1116 | if (!dpc) |
889c78be | 1117 | return AE_NO_MEMORY; |
b976fe19 | 1118 | |
1da177e4 LT |
1119 | dpc->function = function; |
1120 | dpc->context = context; | |
b976fe19 | 1121 | |
c02256be ZR |
1122 | /* |
1123 | * We can't run hotplug code in keventd_wq/kacpid_wq/kacpid_notify_wq | |
1124 | * because the hotplug code may call driver .remove() functions, | |
1125 | * which invoke flush_scheduled_work/acpi_os_wait_events_complete | |
1126 | * to flush these workqueues. | |
3ae45a27 RW |
1127 | * |
1128 | * To prevent lockdep from complaining unnecessarily, make sure that | |
1129 | * there is a different static lockdep key for each workqueue by using | |
1130 | * INIT_WORK() for each of them separately. | |
c02256be | 1131 | */ |
3ae45a27 RW |
1132 | if (hp) { |
1133 | queue = kacpi_hotplug_wq; | |
1134 | dpc->wait = 1; | |
bc73675b | 1135 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); |
3ae45a27 RW |
1136 | } else if (type == OSL_NOTIFY_HANDLER) { |
1137 | queue = kacpi_notify_wq; | |
bc73675b | 1138 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); |
3ae45a27 RW |
1139 | } else { |
1140 | queue = kacpid_wq; | |
bc73675b | 1141 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); |
3ae45a27 | 1142 | } |
bc73675b | 1143 | |
8fec62b2 TH |
1144 | /* |
1145 | * On some machines, a software-initiated SMI causes corruption unless | |
1146 | * the SMI runs on CPU 0. An SMI can be initiated by any AML, but | |
1147 | * typically it's done in GPE-related methods that are run via | |
1148 | * workqueues, so we can avoid the known corruption cases by always | |
1149 | * queueing on CPU 0. | |
1150 | */ | |
1151 | ret = queue_work_on(0, queue, &dpc->work); | |
19cd847a ZR |
1152 | |
1153 | if (!ret) { | |
55ac9a01 LM |
1154 | printk(KERN_ERR PREFIX |
1155 | "Call to queue_work() failed.\n"); | |
17bc54ee AS |
1156 | status = AE_ERROR; |
1157 | kfree(dpc); | |
1da177e4 | 1158 | } |
889c78be | 1159 | return status; |
1da177e4 | 1160 | } |
4be44fcd | 1161 | |
19cd847a ZR |
1162 | acpi_status acpi_os_execute(acpi_execute_type type, |
1163 | acpi_osd_exec_callback function, void *context) | |
1164 | { | |
1165 | return __acpi_os_execute(type, function, context, 0); | |
1166 | } | |
b8d35192 | 1167 | EXPORT_SYMBOL(acpi_os_execute); |
1da177e4 | 1168 | |
19cd847a ZR |
1169 | acpi_status acpi_os_hotplug_execute(acpi_osd_exec_callback function, |
1170 | void *context) | |
1171 | { | |
1172 | return __acpi_os_execute(0, function, context, 1); | |
1173 | } | |
61622acc | 1174 | EXPORT_SYMBOL(acpi_os_hotplug_execute); |
19cd847a | 1175 | |
bd6f10a5 | 1176 | void acpi_os_wait_events_complete(void) |
1da177e4 LT |
1177 | { |
1178 | flush_workqueue(kacpid_wq); | |
2f67a069 | 1179 | flush_workqueue(kacpi_notify_wq); |
1da177e4 | 1180 | } |
4be44fcd | 1181 | |
1da177e4 LT |
1182 | EXPORT_SYMBOL(acpi_os_wait_events_complete); |
1183 | ||
1da177e4 | 1184 | acpi_status |
4be44fcd | 1185 | acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle) |
1da177e4 | 1186 | { |
4be44fcd | 1187 | struct semaphore *sem = NULL; |
1da177e4 | 1188 | |
1da177e4 LT |
1189 | sem = acpi_os_allocate(sizeof(struct semaphore)); |
1190 | if (!sem) | |
d550d98d | 1191 | return AE_NO_MEMORY; |
1da177e4 LT |
1192 | memset(sem, 0, sizeof(struct semaphore)); |
1193 | ||
1194 | sema_init(sem, initial_units); | |
1195 | ||
4be44fcd | 1196 | *handle = (acpi_handle *) sem; |
1da177e4 | 1197 | |
4be44fcd LB |
1198 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n", |
1199 | *handle, initial_units)); | |
1da177e4 | 1200 | |
d550d98d | 1201 | return AE_OK; |
1da177e4 | 1202 | } |
1da177e4 | 1203 | |
1da177e4 LT |
1204 | /* |
1205 | * TODO: A better way to delete semaphores? Linux doesn't have a | |
1206 | * 'delete_semaphore()' function -- may result in an invalid | |
1207 | * pointer dereference for non-synchronized consumers. Should | |
1208 | * we at least check for blocked threads and signal/cancel them? | |
1209 | */ | |
1210 | ||
4be44fcd | 1211 | acpi_status acpi_os_delete_semaphore(acpi_handle handle) |
1da177e4 | 1212 | { |
4be44fcd | 1213 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 1214 | |
1da177e4 | 1215 | if (!sem) |
d550d98d | 1216 | return AE_BAD_PARAMETER; |
1da177e4 | 1217 | |
4be44fcd | 1218 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle)); |
1da177e4 | 1219 | |
f1241c87 | 1220 | BUG_ON(!list_empty(&sem->wait_list)); |
02438d87 | 1221 | kfree(sem); |
4be44fcd | 1222 | sem = NULL; |
1da177e4 | 1223 | |
d550d98d | 1224 | return AE_OK; |
1da177e4 | 1225 | } |
1da177e4 | 1226 | |
1da177e4 | 1227 | /* |
1da177e4 LT |
1228 | * TODO: Support for units > 1? |
1229 | */ | |
4be44fcd | 1230 | acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout) |
1da177e4 | 1231 | { |
4be44fcd LB |
1232 | acpi_status status = AE_OK; |
1233 | struct semaphore *sem = (struct semaphore *)handle; | |
f1241c87 | 1234 | long jiffies; |
4be44fcd | 1235 | int ret = 0; |
1da177e4 | 1236 | |
1da177e4 | 1237 | if (!sem || (units < 1)) |
d550d98d | 1238 | return AE_BAD_PARAMETER; |
1da177e4 LT |
1239 | |
1240 | if (units > 1) | |
d550d98d | 1241 | return AE_SUPPORT; |
1da177e4 | 1242 | |
4be44fcd LB |
1243 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n", |
1244 | handle, units, timeout)); | |
1da177e4 | 1245 | |
f1241c87 MW |
1246 | if (timeout == ACPI_WAIT_FOREVER) |
1247 | jiffies = MAX_SCHEDULE_TIMEOUT; | |
1248 | else | |
1249 | jiffies = msecs_to_jiffies(timeout); | |
1250 | ||
1251 | ret = down_timeout(sem, jiffies); | |
1252 | if (ret) | |
1253 | status = AE_TIME; | |
1da177e4 LT |
1254 | |
1255 | if (ACPI_FAILURE(status)) { | |
9e7e2c04 | 1256 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, |
a6fc6720 | 1257 | "Failed to acquire semaphore[%p|%d|%d], %s", |
4be44fcd LB |
1258 | handle, units, timeout, |
1259 | acpi_format_exception(status))); | |
1260 | } else { | |
1261 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, | |
a6fc6720 | 1262 | "Acquired semaphore[%p|%d|%d]", handle, |
4be44fcd | 1263 | units, timeout)); |
1da177e4 LT |
1264 | } |
1265 | ||
d550d98d | 1266 | return status; |
1da177e4 | 1267 | } |
1da177e4 | 1268 | |
1da177e4 LT |
1269 | /* |
1270 | * TODO: Support for units > 1? | |
1271 | */ | |
4be44fcd | 1272 | acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units) |
1da177e4 | 1273 | { |
4be44fcd | 1274 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 1275 | |
1da177e4 | 1276 | if (!sem || (units < 1)) |
d550d98d | 1277 | return AE_BAD_PARAMETER; |
1da177e4 LT |
1278 | |
1279 | if (units > 1) | |
d550d98d | 1280 | return AE_SUPPORT; |
1da177e4 | 1281 | |
4be44fcd LB |
1282 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle, |
1283 | units)); | |
1da177e4 LT |
1284 | |
1285 | up(sem); | |
1286 | ||
d550d98d | 1287 | return AE_OK; |
1da177e4 | 1288 | } |
4be44fcd | 1289 | |
1da177e4 | 1290 | #ifdef ACPI_FUTURE_USAGE |
4be44fcd | 1291 | u32 acpi_os_get_line(char *buffer) |
1da177e4 LT |
1292 | { |
1293 | ||
1294 | #ifdef ENABLE_DEBUGGER | |
1295 | if (acpi_in_debugger) { | |
1296 | u32 chars; | |
1297 | ||
1298 | kdb_read(buffer, sizeof(line_buf)); | |
1299 | ||
1300 | /* remove the CR kdb includes */ | |
1301 | chars = strlen(buffer) - 1; | |
1302 | buffer[chars] = '\0'; | |
1303 | } | |
1304 | #endif | |
1305 | ||
1306 | return 0; | |
1307 | } | |
4be44fcd | 1308 | #endif /* ACPI_FUTURE_USAGE */ |
1da177e4 | 1309 | |
4be44fcd | 1310 | acpi_status acpi_os_signal(u32 function, void *info) |
1da177e4 | 1311 | { |
4be44fcd | 1312 | switch (function) { |
1da177e4 LT |
1313 | case ACPI_SIGNAL_FATAL: |
1314 | printk(KERN_ERR PREFIX "Fatal opcode executed\n"); | |
1315 | break; | |
1316 | case ACPI_SIGNAL_BREAKPOINT: | |
1317 | /* | |
1318 | * AML Breakpoint | |
1319 | * ACPI spec. says to treat it as a NOP unless | |
1320 | * you are debugging. So if/when we integrate | |
1321 | * AML debugger into the kernel debugger its | |
1322 | * hook will go here. But until then it is | |
1323 | * not useful to print anything on breakpoints. | |
1324 | */ | |
1325 | break; | |
1326 | default: | |
1327 | break; | |
1328 | } | |
1329 | ||
1330 | return AE_OK; | |
1331 | } | |
4be44fcd | 1332 | |
4be44fcd | 1333 | static int __init acpi_os_name_setup(char *str) |
1da177e4 LT |
1334 | { |
1335 | char *p = acpi_os_name; | |
4be44fcd | 1336 | int count = ACPI_MAX_OVERRIDE_LEN - 1; |
1da177e4 LT |
1337 | |
1338 | if (!str || !*str) | |
1339 | return 0; | |
1340 | ||
1341 | for (; count-- && str && *str; str++) { | |
1342 | if (isalnum(*str) || *str == ' ' || *str == ':') | |
1343 | *p++ = *str; | |
1344 | else if (*str == '\'' || *str == '"') | |
1345 | continue; | |
1346 | else | |
1347 | break; | |
1348 | } | |
1349 | *p = 0; | |
1350 | ||
1351 | return 1; | |
4be44fcd | 1352 | |
1da177e4 LT |
1353 | } |
1354 | ||
1355 | __setup("acpi_os_name=", acpi_os_name_setup); | |
1356 | ||
12d32064 LM |
1357 | #define OSI_STRING_LENGTH_MAX 64 /* arbitrary */ |
1358 | #define OSI_STRING_ENTRIES_MAX 16 /* arbitrary */ | |
1359 | ||
1360 | struct osi_setup_entry { | |
1361 | char string[OSI_STRING_LENGTH_MAX]; | |
1362 | bool enable; | |
1363 | }; | |
1364 | ||
aa165971 SL |
1365 | static struct osi_setup_entry __initdata |
1366 | osi_setup_entries[OSI_STRING_ENTRIES_MAX] = { | |
1367 | {"Module Device", true}, | |
1368 | {"Processor Device", true}, | |
1369 | {"3.0 _SCP Extensions", true}, | |
1370 | {"Processor Aggregator Device", true}, | |
1371 | }; | |
12d32064 | 1372 | |
d90aa92c LM |
1373 | void __init acpi_osi_setup(char *str) |
1374 | { | |
12d32064 LM |
1375 | struct osi_setup_entry *osi; |
1376 | bool enable = true; | |
1377 | int i; | |
1378 | ||
d90aa92c LM |
1379 | if (!acpi_gbl_create_osi_method) |
1380 | return; | |
1381 | ||
1382 | if (str == NULL || *str == '\0') { | |
1383 | printk(KERN_INFO PREFIX "_OSI method disabled\n"); | |
1384 | acpi_gbl_create_osi_method = FALSE; | |
12d32064 LM |
1385 | return; |
1386 | } | |
1387 | ||
1388 | if (*str == '!') { | |
1389 | str++; | |
1390 | enable = false; | |
1391 | } | |
1392 | ||
1393 | for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { | |
1394 | osi = &osi_setup_entries[i]; | |
1395 | if (!strcmp(osi->string, str)) { | |
1396 | osi->enable = enable; | |
1397 | break; | |
1398 | } else if (osi->string[0] == '\0') { | |
1399 | osi->enable = enable; | |
1400 | strncpy(osi->string, str, OSI_STRING_LENGTH_MAX); | |
1401 | break; | |
1402 | } | |
1403 | } | |
d90aa92c LM |
1404 | } |
1405 | ||
d4b7dc49 LB |
1406 | static void __init set_osi_linux(unsigned int enable) |
1407 | { | |
d90aa92c | 1408 | if (osi_linux.enable != enable) |
d4b7dc49 | 1409 | osi_linux.enable = enable; |
b0ed7a91 LM |
1410 | |
1411 | if (osi_linux.enable) | |
1412 | acpi_osi_setup("Linux"); | |
1413 | else | |
1414 | acpi_osi_setup("!Linux"); | |
1415 | ||
d4b7dc49 LB |
1416 | return; |
1417 | } | |
1418 | ||
1419 | static void __init acpi_cmdline_osi_linux(unsigned int enable) | |
1420 | { | |
d90aa92c LM |
1421 | osi_linux.cmdline = 1; /* cmdline set the default and override DMI */ |
1422 | osi_linux.dmi = 0; | |
d4b7dc49 LB |
1423 | set_osi_linux(enable); |
1424 | ||
1425 | return; | |
1426 | } | |
1427 | ||
1428 | void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d) | |
1429 | { | |
d4b7dc49 LB |
1430 | printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident); |
1431 | ||
1432 | if (enable == -1) | |
1433 | return; | |
1434 | ||
d90aa92c | 1435 | osi_linux.dmi = 1; /* DMI knows that this box asks OSI(Linux) */ |
d4b7dc49 | 1436 | set_osi_linux(enable); |
f507654d | 1437 | |
f507654d LB |
1438 | return; |
1439 | } | |
1440 | ||
1da177e4 | 1441 | /* |
ae00d812 LB |
1442 | * Modify the list of "OS Interfaces" reported to BIOS via _OSI |
1443 | * | |
1da177e4 | 1444 | * empty string disables _OSI |
ae00d812 LB |
1445 | * string starting with '!' disables that string |
1446 | * otherwise string is added to list, augmenting built-in strings | |
1da177e4 | 1447 | */ |
b0ed7a91 | 1448 | static void __init acpi_osi_setup_late(void) |
1da177e4 | 1449 | { |
12d32064 LM |
1450 | struct osi_setup_entry *osi; |
1451 | char *str; | |
1452 | int i; | |
d90aa92c | 1453 | acpi_status status; |
b0ed7a91 | 1454 | |
12d32064 LM |
1455 | for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { |
1456 | osi = &osi_setup_entries[i]; | |
1457 | str = osi->string; | |
b0ed7a91 | 1458 | |
12d32064 LM |
1459 | if (*str == '\0') |
1460 | break; | |
1461 | if (osi->enable) { | |
1462 | status = acpi_install_interface(str); | |
d90aa92c | 1463 | |
12d32064 LM |
1464 | if (ACPI_SUCCESS(status)) |
1465 | printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str); | |
1466 | } else { | |
1467 | status = acpi_remove_interface(str); | |
d90aa92c | 1468 | |
12d32064 LM |
1469 | if (ACPI_SUCCESS(status)) |
1470 | printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str); | |
1471 | } | |
b0ed7a91 LM |
1472 | } |
1473 | } | |
1474 | ||
d90aa92c | 1475 | static int __init osi_setup(char *str) |
b0ed7a91 | 1476 | { |
d90aa92c LM |
1477 | if (str && !strcmp("Linux", str)) |
1478 | acpi_cmdline_osi_linux(1); | |
1479 | else if (str && !strcmp("!Linux", str)) | |
1480 | acpi_cmdline_osi_linux(0); | |
1481 | else | |
1482 | acpi_osi_setup(str); | |
1da177e4 LT |
1483 | |
1484 | return 1; | |
1485 | } | |
1486 | ||
d90aa92c | 1487 | __setup("acpi_osi=", osi_setup); |
1da177e4 LT |
1488 | |
1489 | /* enable serialization to combat AE_ALREADY_EXISTS errors */ | |
4be44fcd | 1490 | static int __init acpi_serialize_setup(char *str) |
1da177e4 LT |
1491 | { |
1492 | printk(KERN_INFO PREFIX "serialize enabled\n"); | |
1493 | ||
1494 | acpi_gbl_all_methods_serialized = TRUE; | |
1495 | ||
1496 | return 1; | |
1497 | } | |
1498 | ||
1499 | __setup("acpi_serialize", acpi_serialize_setup); | |
1500 | ||
df92e695 TR |
1501 | /* Check of resource interference between native drivers and ACPI |
1502 | * OperationRegions (SystemIO and System Memory only). | |
1503 | * IO ports and memory declared in ACPI might be used by the ACPI subsystem | |
1504 | * in arbitrary AML code and can interfere with legacy drivers. | |
1505 | * acpi_enforce_resources= can be set to: | |
1506 | * | |
7e90560c | 1507 | * - strict (default) (2) |
df92e695 | 1508 | * -> further driver trying to access the resources will not load |
7e90560c | 1509 | * - lax (1) |
df92e695 TR |
1510 | * -> further driver trying to access the resources will load, but you |
1511 | * get a system message that something might go wrong... | |
1512 | * | |
1513 | * - no (0) | |
1514 | * -> ACPI Operation Region resources will not be registered | |
1515 | * | |
1516 | */ | |
1517 | #define ENFORCE_RESOURCES_STRICT 2 | |
1518 | #define ENFORCE_RESOURCES_LAX 1 | |
1519 | #define ENFORCE_RESOURCES_NO 0 | |
1520 | ||
7e90560c | 1521 | static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; |
df92e695 TR |
1522 | |
1523 | static int __init acpi_enforce_resources_setup(char *str) | |
1524 | { | |
1525 | if (str == NULL || *str == '\0') | |
1526 | return 0; | |
1527 | ||
1528 | if (!strcmp("strict", str)) | |
1529 | acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; | |
1530 | else if (!strcmp("lax", str)) | |
1531 | acpi_enforce_resources = ENFORCE_RESOURCES_LAX; | |
1532 | else if (!strcmp("no", str)) | |
1533 | acpi_enforce_resources = ENFORCE_RESOURCES_NO; | |
1534 | ||
1535 | return 1; | |
1536 | } | |
1537 | ||
1538 | __setup("acpi_enforce_resources=", acpi_enforce_resources_setup); | |
1539 | ||
1540 | /* Check for resource conflicts between ACPI OperationRegions and native | |
1541 | * drivers */ | |
876fba43 | 1542 | int acpi_check_resource_conflict(const struct resource *res) |
df92e695 | 1543 | { |
f654c0fe LM |
1544 | acpi_adr_space_type space_id; |
1545 | acpi_size length; | |
1546 | u8 warn = 0; | |
1547 | int clash = 0; | |
df92e695 TR |
1548 | |
1549 | if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) | |
1550 | return 0; | |
1551 | if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM)) | |
1552 | return 0; | |
1553 | ||
f654c0fe LM |
1554 | if (res->flags & IORESOURCE_IO) |
1555 | space_id = ACPI_ADR_SPACE_SYSTEM_IO; | |
1556 | else | |
1557 | space_id = ACPI_ADR_SPACE_SYSTEM_MEMORY; | |
df92e695 | 1558 | |
f654c0fe LM |
1559 | length = res->end - res->start + 1; |
1560 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) | |
1561 | warn = 1; | |
1562 | clash = acpi_check_address_range(space_id, res->start, length, warn); | |
df92e695 TR |
1563 | |
1564 | if (clash) { | |
1565 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) { | |
14f03343 JD |
1566 | if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX) |
1567 | printk(KERN_NOTICE "ACPI: This conflict may" | |
1568 | " cause random problems and system" | |
1569 | " instability\n"); | |
1570 | printk(KERN_INFO "ACPI: If an ACPI driver is available" | |
1571 | " for this device, you should use it instead of" | |
1572 | " the native driver\n"); | |
df92e695 TR |
1573 | } |
1574 | if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT) | |
1575 | return -EBUSY; | |
1576 | } | |
1577 | return 0; | |
1578 | } | |
443dea72 | 1579 | EXPORT_SYMBOL(acpi_check_resource_conflict); |
df92e695 TR |
1580 | |
1581 | int acpi_check_region(resource_size_t start, resource_size_t n, | |
1582 | const char *name) | |
1583 | { | |
1584 | struct resource res = { | |
1585 | .start = start, | |
1586 | .end = start + n - 1, | |
1587 | .name = name, | |
1588 | .flags = IORESOURCE_IO, | |
1589 | }; | |
1590 | ||
1591 | return acpi_check_resource_conflict(&res); | |
1592 | } | |
1593 | EXPORT_SYMBOL(acpi_check_region); | |
1594 | ||
70dd6bea JD |
1595 | /* |
1596 | * Let drivers know whether the resource checks are effective | |
1597 | */ | |
1598 | int acpi_resources_are_enforced(void) | |
1599 | { | |
1600 | return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT; | |
1601 | } | |
1602 | EXPORT_SYMBOL(acpi_resources_are_enforced); | |
1603 | ||
9f63b88b LM |
1604 | /* |
1605 | * Deallocate the memory for a spinlock. | |
1606 | */ | |
1607 | void acpi_os_delete_lock(acpi_spinlock handle) | |
1608 | { | |
1609 | ACPI_FREE(handle); | |
1610 | } | |
1611 | ||
73459f73 RM |
1612 | /* |
1613 | * Acquire a spinlock. | |
1614 | * | |
1615 | * handle is a pointer to the spinlock_t. | |
73459f73 RM |
1616 | */ |
1617 | ||
967440e3 | 1618 | acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp) |
73459f73 | 1619 | { |
b8e4d893 | 1620 | acpi_cpu_flags flags; |
967440e3 | 1621 | spin_lock_irqsave(lockp, flags); |
73459f73 RM |
1622 | return flags; |
1623 | } | |
1624 | ||
1625 | /* | |
1626 | * Release a spinlock. See above. | |
1627 | */ | |
1628 | ||
967440e3 | 1629 | void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags) |
73459f73 | 1630 | { |
967440e3 | 1631 | spin_unlock_irqrestore(lockp, flags); |
73459f73 RM |
1632 | } |
1633 | ||
73459f73 RM |
1634 | #ifndef ACPI_USE_LOCAL_CACHE |
1635 | ||
1636 | /******************************************************************************* | |
1637 | * | |
1638 | * FUNCTION: acpi_os_create_cache | |
1639 | * | |
b229cf92 BM |
1640 | * PARAMETERS: name - Ascii name for the cache |
1641 | * size - Size of each cached object | |
1642 | * depth - Maximum depth of the cache (in objects) <ignored> | |
1643 | * cache - Where the new cache object is returned | |
73459f73 | 1644 | * |
b229cf92 | 1645 | * RETURN: status |
73459f73 RM |
1646 | * |
1647 | * DESCRIPTION: Create a cache object | |
1648 | * | |
1649 | ******************************************************************************/ | |
1650 | ||
1651 | acpi_status | |
4be44fcd | 1652 | acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache) |
73459f73 | 1653 | { |
20c2df83 | 1654 | *cache = kmem_cache_create(name, size, 0, 0, NULL); |
a6fdbf90 | 1655 | if (*cache == NULL) |
b229cf92 BM |
1656 | return AE_ERROR; |
1657 | else | |
1658 | return AE_OK; | |
73459f73 RM |
1659 | } |
1660 | ||
1661 | /******************************************************************************* | |
1662 | * | |
1663 | * FUNCTION: acpi_os_purge_cache | |
1664 | * | |
1665 | * PARAMETERS: Cache - Handle to cache object | |
1666 | * | |
1667 | * RETURN: Status | |
1668 | * | |
1669 | * DESCRIPTION: Free all objects within the requested cache. | |
1670 | * | |
1671 | ******************************************************************************/ | |
1672 | ||
4be44fcd | 1673 | acpi_status acpi_os_purge_cache(acpi_cache_t * cache) |
73459f73 | 1674 | { |
50dd0969 | 1675 | kmem_cache_shrink(cache); |
4be44fcd | 1676 | return (AE_OK); |
73459f73 RM |
1677 | } |
1678 | ||
1679 | /******************************************************************************* | |
1680 | * | |
1681 | * FUNCTION: acpi_os_delete_cache | |
1682 | * | |
1683 | * PARAMETERS: Cache - Handle to cache object | |
1684 | * | |
1685 | * RETURN: Status | |
1686 | * | |
1687 | * DESCRIPTION: Free all objects within the requested cache and delete the | |
1688 | * cache object. | |
1689 | * | |
1690 | ******************************************************************************/ | |
1691 | ||
4be44fcd | 1692 | acpi_status acpi_os_delete_cache(acpi_cache_t * cache) |
73459f73 | 1693 | { |
1a1d92c1 | 1694 | kmem_cache_destroy(cache); |
4be44fcd | 1695 | return (AE_OK); |
73459f73 RM |
1696 | } |
1697 | ||
1698 | /******************************************************************************* | |
1699 | * | |
1700 | * FUNCTION: acpi_os_release_object | |
1701 | * | |
1702 | * PARAMETERS: Cache - Handle to cache object | |
1703 | * Object - The object to be released | |
1704 | * | |
1705 | * RETURN: None | |
1706 | * | |
1707 | * DESCRIPTION: Release an object to the specified cache. If cache is full, | |
1708 | * the object is deleted. | |
1709 | * | |
1710 | ******************************************************************************/ | |
1711 | ||
4be44fcd | 1712 | acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object) |
73459f73 | 1713 | { |
4be44fcd LB |
1714 | kmem_cache_free(cache, object); |
1715 | return (AE_OK); | |
73459f73 | 1716 | } |
73459f73 | 1717 | #endif |
d362edaf MS |
1718 | |
1719 | acpi_status __init acpi_os_initialize(void) | |
1720 | { | |
1721 | acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block); | |
1722 | acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block); | |
1723 | acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block); | |
1724 | acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block); | |
1725 | ||
1726 | return AE_OK; | |
1727 | } | |
1728 | ||
32d47eef | 1729 | acpi_status __init acpi_os_initialize1(void) |
d362edaf | 1730 | { |
44d2588e TH |
1731 | kacpid_wq = alloc_workqueue("kacpid", 0, 1); |
1732 | kacpi_notify_wq = alloc_workqueue("kacpi_notify", 0, 1); | |
1733 | kacpi_hotplug_wq = alloc_workqueue("kacpi_hotplug", 0, 1); | |
d362edaf MS |
1734 | BUG_ON(!kacpid_wq); |
1735 | BUG_ON(!kacpi_notify_wq); | |
1736 | BUG_ON(!kacpi_hotplug_wq); | |
1bd64d42 LB |
1737 | acpi_install_interface_handler(acpi_osi_handler); |
1738 | acpi_osi_setup_late(); | |
d362edaf MS |
1739 | return AE_OK; |
1740 | } | |
1741 | ||
1742 | acpi_status acpi_os_terminate(void) | |
1743 | { | |
1744 | if (acpi_irq_handler) { | |
23fe3630 | 1745 | acpi_os_remove_interrupt_handler(acpi_gbl_FADT.sci_interrupt, |
d362edaf MS |
1746 | acpi_irq_handler); |
1747 | } | |
1748 | ||
1749 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe1_block); | |
1750 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block); | |
1751 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block); | |
1752 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block); | |
1753 | ||
1754 | destroy_workqueue(kacpid_wq); | |
1755 | destroy_workqueue(kacpi_notify_wq); | |
1756 | destroy_workqueue(kacpi_hotplug_wq); | |
1757 | ||
1758 | return AE_OK; | |
1759 | } | |
09f98a82 TL |
1760 | |
1761 | acpi_status acpi_os_prepare_sleep(u8 sleep_state, u32 pm1a_control, | |
1762 | u32 pm1b_control) | |
1763 | { | |
1764 | int rc = 0; | |
1765 | if (__acpi_os_prepare_sleep) | |
1766 | rc = __acpi_os_prepare_sleep(sleep_state, | |
1767 | pm1a_control, pm1b_control); | |
1768 | if (rc < 0) | |
1769 | return AE_ERROR; | |
1770 | else if (rc > 0) | |
1771 | return AE_CTRL_SKIP; | |
1772 | ||
1773 | return AE_OK; | |
1774 | } | |
1775 | ||
1776 | void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state, | |
1777 | u32 pm1a_ctrl, u32 pm1b_ctrl)) | |
1778 | { | |
1779 | __acpi_os_prepare_sleep = func; | |
1780 | } |