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