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1da177e4 LT |
1 | /* |
2 | * acpi_osl.c - OS-dependent functions ($Revision: 83 $) | |
3 | * | |
4 | * Copyright (C) 2000 Andrew Henroid | |
5 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> | |
6 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> | |
f1241c87 MW |
7 | * Copyright (c) 2008 Intel Corporation |
8 | * Author: Matthew Wilcox <willy@linux.intel.com> | |
1da177e4 LT |
9 | * |
10 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
11 | * | |
12 | * This program is free software; you can redistribute it and/or modify | |
13 | * it under the terms of the GNU General Public License as published by | |
14 | * the Free Software Foundation; either version 2 of the License, or | |
15 | * (at your option) any later version. | |
16 | * | |
17 | * This program is distributed in the hope that it will be useful, | |
18 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
19 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
20 | * GNU General Public License for more details. | |
21 | * | |
22 | * You should have received a copy of the GNU General Public License | |
23 | * along with this program; if not, write to the Free Software | |
24 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
25 | * | |
26 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ | |
27 | * | |
28 | */ | |
29 | ||
1da177e4 LT |
30 | #include <linux/module.h> |
31 | #include <linux/kernel.h> | |
32 | #include <linux/slab.h> | |
33 | #include <linux/mm.h> | |
ba242d5b | 34 | #include <linux/highmem.h> |
1da177e4 | 35 | #include <linux/pci.h> |
1da177e4 LT |
36 | #include <linux/interrupt.h> |
37 | #include <linux/kmod.h> | |
38 | #include <linux/delay.h> | |
39 | #include <linux/workqueue.h> | |
40 | #include <linux/nmi.h> | |
ad71860a | 41 | #include <linux/acpi.h> |
2d6d9fd3 | 42 | #include <linux/acpi_io.h> |
1da177e4 | 43 | #include <linux/efi.h> |
df92e695 TR |
44 | #include <linux/ioport.h> |
45 | #include <linux/list.h> | |
f1241c87 MW |
46 | #include <linux/jiffies.h> |
47 | #include <linux/semaphore.h> | |
48 | ||
49 | #include <asm/io.h> | |
50 | #include <asm/uaccess.h> | |
51 | ||
52 | #include <acpi/acpi.h> | |
53 | #include <acpi/acpi_bus.h> | |
54 | #include <acpi/processor.h> | |
1129c92f | 55 | #include "internal.h" |
1da177e4 | 56 | |
1da177e4 | 57 | #define _COMPONENT ACPI_OS_SERVICES |
f52fd66d | 58 | ACPI_MODULE_NAME("osl"); |
1da177e4 | 59 | #define PREFIX "ACPI: " |
4be44fcd LB |
60 | struct acpi_os_dpc { |
61 | acpi_osd_exec_callback function; | |
62 | void *context; | |
65f27f38 | 63 | struct work_struct work; |
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); | |
d6b47b12 BG |
82 | static int (*__acpi_os_prepare_extended_sleep)(u8 sleep_state, u32 val_a, |
83 | u32 val_b); | |
09f98a82 | 84 | |
1da177e4 LT |
85 | static acpi_osd_handler acpi_irq_handler; |
86 | static void *acpi_irq_context; | |
87 | static struct workqueue_struct *kacpid_wq; | |
88db5e14 | 88 | static struct workqueue_struct *kacpi_notify_wq; |
92d8aff3 | 89 | static struct workqueue_struct *kacpi_hotplug_wq; |
1da177e4 | 90 | |
620242ae MS |
91 | /* |
92 | * This list of permanent mappings is for memory that may be accessed from | |
93 | * interrupt context, where we can't do the ioremap(). | |
94 | */ | |
95 | struct acpi_ioremap { | |
96 | struct list_head list; | |
97 | void __iomem *virt; | |
98 | acpi_physical_address phys; | |
99 | acpi_size size; | |
b7c1fadd | 100 | unsigned long refcount; |
620242ae MS |
101 | }; |
102 | ||
103 | static LIST_HEAD(acpi_ioremaps); | |
7bbb8903 | 104 | static DEFINE_MUTEX(acpi_ioremap_lock); |
620242ae | 105 | |
b0ed7a91 | 106 | static void __init acpi_osi_setup_late(void); |
ae00d812 | 107 | |
d4b7dc49 | 108 | /* |
a6e0887f | 109 | * The story of _OSI(Linux) |
d4b7dc49 | 110 | * |
a6e0887f LB |
111 | * From pre-history through Linux-2.6.22, |
112 | * Linux responded TRUE upon a BIOS OSI(Linux) query. | |
d4b7dc49 | 113 | * |
a6e0887f LB |
114 | * Unfortunately, reference BIOS writers got wind of this |
115 | * and put OSI(Linux) in their example code, quickly exposing | |
116 | * this string as ill-conceived and opening the door to | |
117 | * an un-bounded number of BIOS incompatibilities. | |
d4b7dc49 | 118 | * |
a6e0887f LB |
119 | * For example, OSI(Linux) was used on resume to re-POST a |
120 | * video card on one system, because Linux at that time | |
121 | * could not do a speedy restore in its native driver. | |
122 | * But then upon gaining quick native restore capability, | |
123 | * Linux has no way to tell the BIOS to skip the time-consuming | |
124 | * POST -- putting Linux at a permanent performance disadvantage. | |
125 | * On another system, the BIOS writer used OSI(Linux) | |
126 | * to infer native OS support for IPMI! On other systems, | |
127 | * OSI(Linux) simply got in the way of Linux claiming to | |
128 | * be compatible with other operating systems, exposing | |
129 | * BIOS issues such as skipped device initialization. | |
d4b7dc49 | 130 | * |
a6e0887f LB |
131 | * So "Linux" turned out to be a really poor chose of |
132 | * OSI string, and from Linux-2.6.23 onward we respond FALSE. | |
d4b7dc49 LB |
133 | * |
134 | * BIOS writers should NOT query _OSI(Linux) on future systems. | |
a6e0887f LB |
135 | * Linux will complain on the console when it sees it, and return FALSE. |
136 | * To get Linux to return TRUE for your system will require | |
137 | * a kernel source update to add a DMI entry, | |
138 | * or boot with "acpi_osi=Linux" | |
d4b7dc49 | 139 | */ |
d4b7dc49 | 140 | |
1d15d84e | 141 | static struct osi_linux { |
d4b7dc49 LB |
142 | unsigned int enable:1; |
143 | unsigned int dmi:1; | |
144 | unsigned int cmdline:1; | |
5dc17986 LZ |
145 | unsigned int default_disabling:1; |
146 | } osi_linux = {0, 0, 0, 0}; | |
f507654d | 147 | |
b0ed7a91 LM |
148 | static u32 acpi_osi_handler(acpi_string interface, u32 supported) |
149 | { | |
150 | if (!strcmp("Linux", interface)) { | |
151 | ||
8997621b | 152 | printk_once(KERN_NOTICE FW_BUG PREFIX |
b0ed7a91 LM |
153 | "BIOS _OSI(Linux) query %s%s\n", |
154 | osi_linux.enable ? "honored" : "ignored", | |
155 | osi_linux.cmdline ? " via cmdline" : | |
156 | osi_linux.dmi ? " via DMI" : ""); | |
157 | } | |
158 | ||
159 | return supported; | |
160 | } | |
161 | ||
bc9ffce2 | 162 | static void __init acpi_request_region (struct acpi_generic_address *gas, |
9a47cdb1 BH |
163 | unsigned int length, char *desc) |
164 | { | |
bc9ffce2 MS |
165 | u64 addr; |
166 | ||
167 | /* Handle possible alignment issues */ | |
168 | memcpy(&addr, &gas->address, sizeof(addr)); | |
169 | if (!addr || !length) | |
9a47cdb1 BH |
170 | return; |
171 | ||
cfa806f0 | 172 | /* Resources are never freed */ |
bc9ffce2 MS |
173 | if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_IO) |
174 | request_region(addr, length, desc); | |
175 | else if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) | |
176 | request_mem_region(addr, length, desc); | |
9a47cdb1 BH |
177 | } |
178 | ||
179 | static int __init acpi_reserve_resources(void) | |
180 | { | |
eee3c859 | 181 | acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
182 | "ACPI PM1a_EVT_BLK"); |
183 | ||
eee3c859 | 184 | acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length, |
9a47cdb1 BH |
185 | "ACPI PM1b_EVT_BLK"); |
186 | ||
eee3c859 | 187 | acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
188 | "ACPI PM1a_CNT_BLK"); |
189 | ||
eee3c859 | 190 | acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length, |
9a47cdb1 BH |
191 | "ACPI PM1b_CNT_BLK"); |
192 | ||
eee3c859 LB |
193 | if (acpi_gbl_FADT.pm_timer_length == 4) |
194 | acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR"); | |
9a47cdb1 | 195 | |
eee3c859 | 196 | acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length, |
9a47cdb1 BH |
197 | "ACPI PM2_CNT_BLK"); |
198 | ||
199 | /* Length of GPE blocks must be a non-negative multiple of 2 */ | |
200 | ||
eee3c859 LB |
201 | if (!(acpi_gbl_FADT.gpe0_block_length & 0x1)) |
202 | acpi_request_region(&acpi_gbl_FADT.xgpe0_block, | |
203 | acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK"); | |
9a47cdb1 | 204 | |
eee3c859 LB |
205 | if (!(acpi_gbl_FADT.gpe1_block_length & 0x1)) |
206 | acpi_request_region(&acpi_gbl_FADT.xgpe1_block, | |
207 | acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK"); | |
9a47cdb1 BH |
208 | |
209 | return 0; | |
210 | } | |
211 | device_initcall(acpi_reserve_resources); | |
212 | ||
4be44fcd | 213 | void acpi_os_printf(const char *fmt, ...) |
1da177e4 LT |
214 | { |
215 | va_list args; | |
216 | va_start(args, fmt); | |
217 | acpi_os_vprintf(fmt, args); | |
218 | va_end(args); | |
219 | } | |
4be44fcd | 220 | |
4be44fcd | 221 | void acpi_os_vprintf(const char *fmt, va_list args) |
1da177e4 LT |
222 | { |
223 | static char buffer[512]; | |
4be44fcd | 224 | |
1da177e4 LT |
225 | vsprintf(buffer, fmt, args); |
226 | ||
227 | #ifdef ENABLE_DEBUGGER | |
228 | if (acpi_in_debugger) { | |
229 | kdb_printf("%s", buffer); | |
230 | } else { | |
4d939155 | 231 | printk(KERN_CONT "%s", buffer); |
1da177e4 LT |
232 | } |
233 | #else | |
4d939155 | 234 | printk(KERN_CONT "%s", buffer); |
1da177e4 LT |
235 | #endif |
236 | } | |
237 | ||
4996c023 TI |
238 | #ifdef CONFIG_KEXEC |
239 | static unsigned long acpi_rsdp; | |
240 | static int __init setup_acpi_rsdp(char *arg) | |
241 | { | |
242 | acpi_rsdp = simple_strtoul(arg, NULL, 16); | |
243 | return 0; | |
244 | } | |
245 | early_param("acpi_rsdp", setup_acpi_rsdp); | |
246 | #endif | |
247 | ||
ad71860a | 248 | acpi_physical_address __init acpi_os_get_root_pointer(void) |
1da177e4 | 249 | { |
4996c023 TI |
250 | #ifdef CONFIG_KEXEC |
251 | if (acpi_rsdp) | |
252 | return acpi_rsdp; | |
253 | #endif | |
254 | ||
83e68189 | 255 | if (efi_enabled(EFI_CONFIG_TABLES)) { |
b2c99e3c | 256 | if (efi.acpi20 != EFI_INVALID_TABLE_ADDR) |
ad71860a | 257 | return efi.acpi20; |
b2c99e3c | 258 | else if (efi.acpi != EFI_INVALID_TABLE_ADDR) |
ad71860a | 259 | return efi.acpi; |
1da177e4 | 260 | else { |
4be44fcd LB |
261 | printk(KERN_ERR PREFIX |
262 | "System description tables not found\n"); | |
ad71860a | 263 | return 0; |
1da177e4 | 264 | } |
239665a3 LB |
265 | } else { |
266 | acpi_physical_address pa = 0; | |
267 | ||
268 | acpi_find_root_pointer(&pa); | |
269 | return pa; | |
270 | } | |
1da177e4 LT |
271 | } |
272 | ||
78cdb3ed | 273 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ |
4a3cba5e MS |
274 | static struct acpi_ioremap * |
275 | acpi_map_lookup(acpi_physical_address phys, acpi_size size) | |
620242ae MS |
276 | { |
277 | struct acpi_ioremap *map; | |
278 | ||
78cdb3ed | 279 | list_for_each_entry_rcu(map, &acpi_ioremaps, list) |
620242ae MS |
280 | if (map->phys <= phys && |
281 | phys + size <= map->phys + map->size) | |
4a3cba5e MS |
282 | return map; |
283 | ||
284 | return NULL; | |
285 | } | |
286 | ||
287 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ | |
288 | static void __iomem * | |
289 | acpi_map_vaddr_lookup(acpi_physical_address phys, unsigned int size) | |
290 | { | |
291 | struct acpi_ioremap *map; | |
292 | ||
293 | map = acpi_map_lookup(phys, size); | |
294 | if (map) | |
295 | return map->virt + (phys - map->phys); | |
620242ae MS |
296 | |
297 | return NULL; | |
298 | } | |
299 | ||
13606a2d RW |
300 | void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size) |
301 | { | |
302 | struct acpi_ioremap *map; | |
303 | void __iomem *virt = NULL; | |
304 | ||
305 | mutex_lock(&acpi_ioremap_lock); | |
306 | map = acpi_map_lookup(phys, size); | |
307 | if (map) { | |
308 | virt = map->virt + (phys - map->phys); | |
309 | map->refcount++; | |
310 | } | |
311 | mutex_unlock(&acpi_ioremap_lock); | |
312 | return virt; | |
313 | } | |
314 | EXPORT_SYMBOL_GPL(acpi_os_get_iomem); | |
315 | ||
78cdb3ed | 316 | /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */ |
620242ae MS |
317 | static struct acpi_ioremap * |
318 | acpi_map_lookup_virt(void __iomem *virt, acpi_size size) | |
319 | { | |
320 | struct acpi_ioremap *map; | |
321 | ||
78cdb3ed | 322 | list_for_each_entry_rcu(map, &acpi_ioremaps, list) |
4a3cba5e MS |
323 | if (map->virt <= virt && |
324 | virt + size <= map->virt + map->size) | |
620242ae MS |
325 | return map; |
326 | ||
327 | return NULL; | |
328 | } | |
329 | ||
ba242d5b MS |
330 | #ifndef CONFIG_IA64 |
331 | #define should_use_kmap(pfn) page_is_ram(pfn) | |
332 | #else | |
333 | /* ioremap will take care of cache attributes */ | |
334 | #define should_use_kmap(pfn) 0 | |
335 | #endif | |
336 | ||
337 | static void __iomem *acpi_map(acpi_physical_address pg_off, unsigned long pg_sz) | |
338 | { | |
339 | unsigned long pfn; | |
340 | ||
341 | pfn = pg_off >> PAGE_SHIFT; | |
342 | if (should_use_kmap(pfn)) { | |
343 | if (pg_sz > PAGE_SIZE) | |
344 | return NULL; | |
345 | return (void __iomem __force *)kmap(pfn_to_page(pfn)); | |
346 | } else | |
347 | return acpi_os_ioremap(pg_off, pg_sz); | |
348 | } | |
349 | ||
350 | static void acpi_unmap(acpi_physical_address pg_off, void __iomem *vaddr) | |
351 | { | |
352 | unsigned long pfn; | |
353 | ||
354 | pfn = pg_off >> PAGE_SHIFT; | |
e252675f | 355 | if (should_use_kmap(pfn)) |
ba242d5b MS |
356 | kunmap(pfn_to_page(pfn)); |
357 | else | |
358 | iounmap(vaddr); | |
359 | } | |
360 | ||
2fdf0741 JB |
361 | void __iomem *__init_refok |
362 | acpi_os_map_memory(acpi_physical_address phys, acpi_size size) | |
1da177e4 | 363 | { |
7ffd0443 | 364 | struct acpi_ioremap *map; |
620242ae | 365 | void __iomem *virt; |
2d6d9fd3 RW |
366 | acpi_physical_address pg_off; |
367 | acpi_size pg_sz; | |
620242ae | 368 | |
9f4fd61f BH |
369 | if (phys > ULONG_MAX) { |
370 | printk(KERN_ERR PREFIX "Cannot map memory that high\n"); | |
70c0846e | 371 | return NULL; |
1da177e4 | 372 | } |
620242ae MS |
373 | |
374 | if (!acpi_gbl_permanent_mmap) | |
ad71860a | 375 | return __acpi_map_table((unsigned long)phys, size); |
620242ae | 376 | |
7ffd0443 RW |
377 | mutex_lock(&acpi_ioremap_lock); |
378 | /* Check if there's a suitable mapping already. */ | |
379 | map = acpi_map_lookup(phys, size); | |
380 | if (map) { | |
b7c1fadd | 381 | map->refcount++; |
7ffd0443 RW |
382 | goto out; |
383 | } | |
384 | ||
620242ae | 385 | map = kzalloc(sizeof(*map), GFP_KERNEL); |
7ffd0443 RW |
386 | if (!map) { |
387 | mutex_unlock(&acpi_ioremap_lock); | |
620242ae | 388 | return NULL; |
7ffd0443 | 389 | } |
620242ae | 390 | |
4a3cba5e MS |
391 | pg_off = round_down(phys, PAGE_SIZE); |
392 | pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off; | |
ba242d5b | 393 | virt = acpi_map(pg_off, pg_sz); |
620242ae | 394 | if (!virt) { |
7ffd0443 | 395 | mutex_unlock(&acpi_ioremap_lock); |
620242ae MS |
396 | kfree(map); |
397 | return NULL; | |
398 | } | |
399 | ||
400 | INIT_LIST_HEAD(&map->list); | |
401 | map->virt = virt; | |
4a3cba5e MS |
402 | map->phys = pg_off; |
403 | map->size = pg_sz; | |
b7c1fadd | 404 | map->refcount = 1; |
620242ae | 405 | |
78cdb3ed | 406 | list_add_tail_rcu(&map->list, &acpi_ioremaps); |
620242ae | 407 | |
7ffd0443 RW |
408 | out: |
409 | mutex_unlock(&acpi_ioremap_lock); | |
4a3cba5e | 410 | return map->virt + (phys - map->phys); |
1da177e4 | 411 | } |
55a82ab3 | 412 | EXPORT_SYMBOL_GPL(acpi_os_map_memory); |
1da177e4 | 413 | |
b7c1fadd | 414 | static void acpi_os_drop_map_ref(struct acpi_ioremap *map) |
4a3cba5e | 415 | { |
b7c1fadd RW |
416 | if (!--map->refcount) |
417 | list_del_rcu(&map->list); | |
4a3cba5e | 418 | } |
4a3cba5e | 419 | |
b7c1fadd | 420 | static void acpi_os_map_cleanup(struct acpi_ioremap *map) |
7fe135dc | 421 | { |
b7c1fadd RW |
422 | if (!map->refcount) { |
423 | synchronize_rcu(); | |
ba242d5b | 424 | acpi_unmap(map->phys, map->virt); |
b7c1fadd RW |
425 | kfree(map); |
426 | } | |
4a3cba5e MS |
427 | } |
428 | ||
0d3a9cf5 | 429 | void __ref acpi_os_unmap_memory(void __iomem *virt, acpi_size size) |
1da177e4 | 430 | { |
620242ae | 431 | struct acpi_ioremap *map; |
620242ae MS |
432 | |
433 | if (!acpi_gbl_permanent_mmap) { | |
7d97277b | 434 | __acpi_unmap_table(virt, size); |
620242ae MS |
435 | return; |
436 | } | |
437 | ||
7bbb8903 | 438 | mutex_lock(&acpi_ioremap_lock); |
620242ae MS |
439 | map = acpi_map_lookup_virt(virt, size); |
440 | if (!map) { | |
7bbb8903 | 441 | mutex_unlock(&acpi_ioremap_lock); |
7fe135dc | 442 | WARN(true, PREFIX "%s: bad address %p\n", __func__, virt); |
620242ae MS |
443 | return; |
444 | } | |
b7c1fadd | 445 | acpi_os_drop_map_ref(map); |
7bbb8903 | 446 | mutex_unlock(&acpi_ioremap_lock); |
620242ae | 447 | |
b7c1fadd | 448 | acpi_os_map_cleanup(map); |
1da177e4 | 449 | } |
55a82ab3 | 450 | EXPORT_SYMBOL_GPL(acpi_os_unmap_memory); |
1da177e4 | 451 | |
0d3a9cf5 | 452 | void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size) |
7d97277b YL |
453 | { |
454 | if (!acpi_gbl_permanent_mmap) | |
455 | __acpi_unmap_table(virt, size); | |
456 | } | |
457 | ||
6f68c91c | 458 | int acpi_os_map_generic_address(struct acpi_generic_address *gas) |
29718521 | 459 | { |
bc9ffce2 | 460 | u64 addr; |
29718521 MS |
461 | void __iomem *virt; |
462 | ||
bc9ffce2 | 463 | if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) |
29718521 MS |
464 | return 0; |
465 | ||
bc9ffce2 MS |
466 | /* Handle possible alignment issues */ |
467 | memcpy(&addr, &gas->address, sizeof(addr)); | |
468 | if (!addr || !gas->bit_width) | |
29718521 MS |
469 | return -EINVAL; |
470 | ||
bc9ffce2 | 471 | virt = acpi_os_map_memory(addr, gas->bit_width / 8); |
29718521 MS |
472 | if (!virt) |
473 | return -EIO; | |
474 | ||
475 | return 0; | |
476 | } | |
6f68c91c | 477 | EXPORT_SYMBOL(acpi_os_map_generic_address); |
29718521 | 478 | |
6f68c91c | 479 | void acpi_os_unmap_generic_address(struct acpi_generic_address *gas) |
29718521 | 480 | { |
bc9ffce2 | 481 | u64 addr; |
7fe135dc | 482 | struct acpi_ioremap *map; |
29718521 | 483 | |
bc9ffce2 | 484 | if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) |
29718521 MS |
485 | return; |
486 | ||
bc9ffce2 MS |
487 | /* Handle possible alignment issues */ |
488 | memcpy(&addr, &gas->address, sizeof(addr)); | |
489 | if (!addr || !gas->bit_width) | |
29718521 MS |
490 | return; |
491 | ||
7bbb8903 | 492 | mutex_lock(&acpi_ioremap_lock); |
bc9ffce2 | 493 | map = acpi_map_lookup(addr, gas->bit_width / 8); |
7fe135dc RW |
494 | if (!map) { |
495 | mutex_unlock(&acpi_ioremap_lock); | |
496 | return; | |
497 | } | |
b7c1fadd | 498 | acpi_os_drop_map_ref(map); |
7bbb8903 | 499 | mutex_unlock(&acpi_ioremap_lock); |
29718521 | 500 | |
b7c1fadd | 501 | acpi_os_map_cleanup(map); |
29718521 | 502 | } |
6f68c91c | 503 | EXPORT_SYMBOL(acpi_os_unmap_generic_address); |
29718521 | 504 | |
1da177e4 LT |
505 | #ifdef ACPI_FUTURE_USAGE |
506 | acpi_status | |
4be44fcd | 507 | acpi_os_get_physical_address(void *virt, acpi_physical_address * phys) |
1da177e4 | 508 | { |
4be44fcd | 509 | if (!phys || !virt) |
1da177e4 LT |
510 | return AE_BAD_PARAMETER; |
511 | ||
512 | *phys = virt_to_phys(virt); | |
513 | ||
514 | return AE_OK; | |
515 | } | |
516 | #endif | |
517 | ||
518 | #define ACPI_MAX_OVERRIDE_LEN 100 | |
519 | ||
520 | static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN]; | |
521 | ||
522 | acpi_status | |
4be44fcd LB |
523 | acpi_os_predefined_override(const struct acpi_predefined_names *init_val, |
524 | acpi_string * new_val) | |
1da177e4 LT |
525 | { |
526 | if (!init_val || !new_val) | |
527 | return AE_BAD_PARAMETER; | |
528 | ||
529 | *new_val = NULL; | |
4be44fcd | 530 | if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) { |
1da177e4 | 531 | printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n", |
4be44fcd | 532 | acpi_os_name); |
1da177e4 LT |
533 | *new_val = acpi_os_name; |
534 | } | |
535 | ||
536 | return AE_OK; | |
537 | } | |
538 | ||
53aac44c TR |
539 | #ifdef CONFIG_ACPI_INITRD_TABLE_OVERRIDE |
540 | #include <linux/earlycpio.h> | |
541 | #include <linux/memblock.h> | |
542 | ||
543 | static u64 acpi_tables_addr; | |
544 | static int all_tables_size; | |
545 | ||
546 | /* Copied from acpica/tbutils.c:acpi_tb_checksum() */ | |
547 | u8 __init acpi_table_checksum(u8 *buffer, u32 length) | |
548 | { | |
549 | u8 sum = 0; | |
550 | u8 *end = buffer + length; | |
551 | ||
552 | while (buffer < end) | |
553 | sum = (u8) (sum + *(buffer++)); | |
554 | return sum; | |
555 | } | |
556 | ||
557 | /* All but ACPI_SIG_RSDP and ACPI_SIG_FACS: */ | |
558 | static const char * const table_sigs[] = { | |
559 | ACPI_SIG_BERT, ACPI_SIG_CPEP, ACPI_SIG_ECDT, ACPI_SIG_EINJ, | |
560 | ACPI_SIG_ERST, ACPI_SIG_HEST, ACPI_SIG_MADT, ACPI_SIG_MSCT, | |
561 | ACPI_SIG_SBST, ACPI_SIG_SLIT, ACPI_SIG_SRAT, ACPI_SIG_ASF, | |
562 | ACPI_SIG_BOOT, ACPI_SIG_DBGP, ACPI_SIG_DMAR, ACPI_SIG_HPET, | |
563 | ACPI_SIG_IBFT, ACPI_SIG_IVRS, ACPI_SIG_MCFG, ACPI_SIG_MCHI, | |
564 | ACPI_SIG_SLIC, ACPI_SIG_SPCR, ACPI_SIG_SPMI, ACPI_SIG_TCPA, | |
565 | ACPI_SIG_UEFI, ACPI_SIG_WAET, ACPI_SIG_WDAT, ACPI_SIG_WDDT, | |
566 | ACPI_SIG_WDRT, ACPI_SIG_DSDT, ACPI_SIG_FADT, ACPI_SIG_PSDT, | |
567 | ACPI_SIG_RSDT, ACPI_SIG_XSDT, ACPI_SIG_SSDT, NULL }; | |
568 | ||
53aac44c TR |
569 | #define ACPI_HEADER_SIZE sizeof(struct acpi_table_header) |
570 | ||
bee7f9c8 YL |
571 | #define ACPI_OVERRIDE_TABLES 64 |
572 | static struct cpio_data __initdata acpi_initrd_files[ACPI_OVERRIDE_TABLES]; | |
573 | ||
574 | #define MAP_CHUNK_SIZE (NR_FIX_BTMAPS << PAGE_SHIFT) | |
53aac44c TR |
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; | |
53aac44c TR |
583 | |
584 | if (data == NULL || size == 0) | |
585 | return; | |
586 | ||
587 | for (no = 0; no < ACPI_OVERRIDE_TABLES; no++) { | |
588 | file = find_cpio_data(cpio_path, data, size, &offset); | |
589 | if (!file.data) | |
590 | break; | |
591 | ||
592 | data += offset; | |
593 | size -= offset; | |
594 | ||
7702ae0d TC |
595 | if (file.size < sizeof(struct acpi_table_header)) { |
596 | pr_err("ACPI OVERRIDE: Table smaller than ACPI header [%s%s]\n", | |
597 | cpio_path, file.name); | |
598 | continue; | |
599 | } | |
53aac44c TR |
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 | ||
7702ae0d TC |
607 | if (!table_sigs[sig]) { |
608 | pr_err("ACPI OVERRIDE: Unknown signature [%s%s]\n", | |
609 | cpio_path, file.name); | |
610 | continue; | |
611 | } | |
612 | if (file.size != table->length) { | |
613 | pr_err("ACPI OVERRIDE: File length does not match table length [%s%s]\n", | |
614 | cpio_path, file.name); | |
615 | continue; | |
616 | } | |
617 | if (acpi_table_checksum(file.data, table->length)) { | |
618 | pr_err("ACPI OVERRIDE: Bad table checksum [%s%s]\n", | |
619 | cpio_path, file.name); | |
620 | continue; | |
621 | } | |
53aac44c TR |
622 | |
623 | pr_info("%4.4s ACPI table found in initrd [%s%s][0x%x]\n", | |
624 | table->signature, cpio_path, file.name, table->length); | |
625 | ||
626 | all_tables_size += table->length; | |
bee7f9c8 YL |
627 | acpi_initrd_files[table_nr].data = file.data; |
628 | acpi_initrd_files[table_nr].size = file.size; | |
53aac44c TR |
629 | table_nr++; |
630 | } | |
631 | if (table_nr == 0) | |
632 | return; | |
633 | ||
634 | acpi_tables_addr = | |
635 | memblock_find_in_range(0, max_low_pfn_mapped << PAGE_SHIFT, | |
636 | all_tables_size, PAGE_SIZE); | |
637 | if (!acpi_tables_addr) { | |
638 | WARN_ON(1); | |
639 | return; | |
640 | } | |
641 | /* | |
642 | * Only calling e820_add_reserve does not work and the | |
643 | * tables are invalid (memory got used) later. | |
644 | * memblock_reserve works as expected and the tables won't get modified. | |
645 | * But it's not enough on X86 because ioremap will | |
646 | * complain later (used by acpi_os_map_memory) that the pages | |
647 | * that should get mapped are not marked "reserved". | |
648 | * Both memblock_reserve and e820_add_region (via arch_reserve_mem_area) | |
649 | * works fine. | |
650 | */ | |
a6432ded | 651 | memblock_reserve(acpi_tables_addr, all_tables_size); |
53aac44c TR |
652 | arch_reserve_mem_area(acpi_tables_addr, all_tables_size); |
653 | ||
bee7f9c8 YL |
654 | /* |
655 | * early_ioremap only can remap 256k one time. If we map all | |
656 | * tables one time, we will hit the limit. Need to map chunks | |
657 | * one by one during copying the same as that in relocate_initrd(). | |
658 | */ | |
53aac44c | 659 | for (no = 0; no < table_nr; no++) { |
bee7f9c8 YL |
660 | unsigned char *src_p = acpi_initrd_files[no].data; |
661 | phys_addr_t size = acpi_initrd_files[no].size; | |
662 | phys_addr_t dest_addr = acpi_tables_addr + total_offset; | |
663 | phys_addr_t slop, clen; | |
664 | char *dest_p; | |
665 | ||
666 | total_offset += size; | |
667 | ||
668 | while (size) { | |
669 | slop = dest_addr & ~PAGE_MASK; | |
670 | clen = size; | |
671 | if (clen > MAP_CHUNK_SIZE - slop) | |
672 | clen = MAP_CHUNK_SIZE - slop; | |
673 | dest_p = early_ioremap(dest_addr & PAGE_MASK, | |
674 | clen + slop); | |
675 | memcpy(dest_p + slop, src_p, clen); | |
676 | early_iounmap(dest_p, clen + slop); | |
677 | src_p += clen; | |
678 | dest_addr += clen; | |
679 | size -= clen; | |
680 | } | |
53aac44c | 681 | } |
53aac44c TR |
682 | } |
683 | #endif /* CONFIG_ACPI_INITRD_TABLE_OVERRIDE */ | |
684 | ||
325a8d36 TR |
685 | static void acpi_table_taint(struct acpi_table_header *table) |
686 | { | |
687 | pr_warn(PREFIX | |
688 | "Override [%4.4s-%8.8s], this is unsafe: tainting kernel\n", | |
689 | table->signature, table->oem_table_id); | |
373d4d09 | 690 | add_taint(TAINT_OVERRIDDEN_ACPI_TABLE, LOCKDEP_NOW_UNRELIABLE); |
325a8d36 TR |
691 | } |
692 | ||
693 | ||
1da177e4 | 694 | acpi_status |
4be44fcd LB |
695 | acpi_os_table_override(struct acpi_table_header * existing_table, |
696 | struct acpi_table_header ** new_table) | |
1da177e4 LT |
697 | { |
698 | if (!existing_table || !new_table) | |
699 | return AE_BAD_PARAMETER; | |
700 | ||
71fc47a9 MG |
701 | *new_table = NULL; |
702 | ||
1da177e4 LT |
703 | #ifdef CONFIG_ACPI_CUSTOM_DSDT |
704 | if (strncmp(existing_table->signature, "DSDT", 4) == 0) | |
4be44fcd | 705 | *new_table = (struct acpi_table_header *)AmlCode; |
1da177e4 | 706 | #endif |
325a8d36 TR |
707 | if (*new_table != NULL) |
708 | acpi_table_taint(existing_table); | |
1da177e4 LT |
709 | return AE_OK; |
710 | } | |
711 | ||
f7b004a1 BM |
712 | acpi_status |
713 | acpi_os_physical_table_override(struct acpi_table_header *existing_table, | |
b2a35003 TR |
714 | acpi_physical_address *address, |
715 | u32 *table_length) | |
f7b004a1 | 716 | { |
b2a35003 TR |
717 | #ifndef CONFIG_ACPI_INITRD_TABLE_OVERRIDE |
718 | *table_length = 0; | |
719 | *address = 0; | |
720 | return AE_OK; | |
721 | #else | |
722 | int table_offset = 0; | |
723 | struct acpi_table_header *table; | |
724 | ||
725 | *table_length = 0; | |
726 | *address = 0; | |
727 | ||
728 | if (!acpi_tables_addr) | |
729 | return AE_OK; | |
730 | ||
731 | do { | |
732 | if (table_offset + ACPI_HEADER_SIZE > all_tables_size) { | |
733 | WARN_ON(1); | |
734 | return AE_OK; | |
735 | } | |
736 | ||
737 | table = acpi_os_map_memory(acpi_tables_addr + table_offset, | |
738 | ACPI_HEADER_SIZE); | |
f7b004a1 | 739 | |
b2a35003 TR |
740 | if (table_offset + table->length > all_tables_size) { |
741 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
742 | WARN_ON(1); | |
743 | return AE_OK; | |
744 | } | |
745 | ||
746 | table_offset += table->length; | |
747 | ||
748 | if (memcmp(existing_table->signature, table->signature, 4)) { | |
749 | acpi_os_unmap_memory(table, | |
750 | ACPI_HEADER_SIZE); | |
751 | continue; | |
752 | } | |
753 | ||
754 | /* Only override tables with matching oem id */ | |
755 | if (memcmp(table->oem_table_id, existing_table->oem_table_id, | |
756 | ACPI_OEM_TABLE_ID_SIZE)) { | |
757 | acpi_os_unmap_memory(table, | |
758 | ACPI_HEADER_SIZE); | |
759 | continue; | |
760 | } | |
761 | ||
762 | table_offset -= table->length; | |
763 | *table_length = table->length; | |
764 | acpi_os_unmap_memory(table, ACPI_HEADER_SIZE); | |
765 | *address = acpi_tables_addr + table_offset; | |
766 | break; | |
767 | } while (table_offset + ACPI_HEADER_SIZE < all_tables_size); | |
f7b004a1 | 768 | |
325a8d36 TR |
769 | if (*address != 0) |
770 | acpi_table_taint(existing_table); | |
b2a35003 TR |
771 | return AE_OK; |
772 | #endif | |
773 | } | |
f7b004a1 | 774 | |
7d12e780 | 775 | static irqreturn_t acpi_irq(int irq, void *dev_id) |
1da177e4 | 776 | { |
5229e87d LB |
777 | u32 handled; |
778 | ||
779 | handled = (*acpi_irq_handler) (acpi_irq_context); | |
780 | ||
781 | if (handled) { | |
782 | acpi_irq_handled++; | |
783 | return IRQ_HANDLED; | |
88bea188 LB |
784 | } else { |
785 | acpi_irq_not_handled++; | |
5229e87d | 786 | return IRQ_NONE; |
88bea188 | 787 | } |
1da177e4 LT |
788 | } |
789 | ||
790 | acpi_status | |
4be44fcd LB |
791 | acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler, |
792 | void *context) | |
1da177e4 LT |
793 | { |
794 | unsigned int irq; | |
795 | ||
5229e87d LB |
796 | acpi_irq_stats_init(); |
797 | ||
1da177e4 | 798 | /* |
23fe3630 RW |
799 | * ACPI interrupts different from the SCI in our copy of the FADT are |
800 | * not supported. | |
1da177e4 | 801 | */ |
23fe3630 RW |
802 | if (gsi != acpi_gbl_FADT.sci_interrupt) |
803 | return AE_BAD_PARAMETER; | |
804 | ||
805 | if (acpi_irq_handler) | |
806 | return AE_ALREADY_ACQUIRED; | |
807 | ||
1da177e4 LT |
808 | if (acpi_gsi_to_irq(gsi, &irq) < 0) { |
809 | printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n", | |
810 | gsi); | |
811 | return AE_OK; | |
812 | } | |
813 | ||
814 | acpi_irq_handler = handler; | |
815 | acpi_irq_context = context; | |
89a22dad | 816 | if (request_irq(irq, acpi_irq, IRQF_SHARED | IRQF_NO_SUSPEND, "acpi", acpi_irq)) { |
1da177e4 | 817 | printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq); |
23fe3630 | 818 | acpi_irq_handler = NULL; |
1da177e4 LT |
819 | return AE_NOT_ACQUIRED; |
820 | } | |
1da177e4 LT |
821 | |
822 | return AE_OK; | |
823 | } | |
824 | ||
4be44fcd | 825 | acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler) |
1da177e4 | 826 | { |
23fe3630 RW |
827 | if (irq != acpi_gbl_FADT.sci_interrupt) |
828 | return AE_BAD_PARAMETER; | |
829 | ||
830 | free_irq(irq, acpi_irq); | |
831 | acpi_irq_handler = NULL; | |
1da177e4 LT |
832 | |
833 | return AE_OK; | |
834 | } | |
835 | ||
836 | /* | |
837 | * Running in interpreter thread context, safe to sleep | |
838 | */ | |
839 | ||
439913ff | 840 | void acpi_os_sleep(u64 ms) |
1da177e4 | 841 | { |
30282299 | 842 | msleep(ms); |
1da177e4 | 843 | } |
4be44fcd | 844 | |
4be44fcd | 845 | void acpi_os_stall(u32 us) |
1da177e4 LT |
846 | { |
847 | while (us) { | |
848 | u32 delay = 1000; | |
849 | ||
850 | if (delay > us) | |
851 | delay = us; | |
852 | udelay(delay); | |
853 | touch_nmi_watchdog(); | |
854 | us -= delay; | |
855 | } | |
856 | } | |
4be44fcd | 857 | |
1da177e4 LT |
858 | /* |
859 | * Support ACPI 3.0 AML Timer operand | |
860 | * Returns 64-bit free-running, monotonically increasing timer | |
861 | * with 100ns granularity | |
862 | */ | |
4be44fcd | 863 | u64 acpi_os_get_timer(void) |
1da177e4 | 864 | { |
10619066 MW |
865 | u64 time_ns = ktime_to_ns(ktime_get()); |
866 | do_div(time_ns, 100); | |
867 | return time_ns; | |
1da177e4 LT |
868 | } |
869 | ||
4be44fcd | 870 | acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width) |
1da177e4 LT |
871 | { |
872 | u32 dummy; | |
873 | ||
874 | if (!value) | |
875 | value = &dummy; | |
876 | ||
49fbabf5 ZY |
877 | *value = 0; |
878 | if (width <= 8) { | |
4be44fcd | 879 | *(u8 *) value = inb(port); |
49fbabf5 | 880 | } else if (width <= 16) { |
4be44fcd | 881 | *(u16 *) value = inw(port); |
49fbabf5 | 882 | } else if (width <= 32) { |
4be44fcd | 883 | *(u32 *) value = inl(port); |
49fbabf5 | 884 | } else { |
1da177e4 LT |
885 | BUG(); |
886 | } | |
887 | ||
888 | return AE_OK; | |
889 | } | |
4be44fcd | 890 | |
1da177e4 LT |
891 | EXPORT_SYMBOL(acpi_os_read_port); |
892 | ||
4be44fcd | 893 | acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width) |
1da177e4 | 894 | { |
49fbabf5 | 895 | if (width <= 8) { |
1da177e4 | 896 | outb(value, port); |
49fbabf5 | 897 | } else if (width <= 16) { |
1da177e4 | 898 | outw(value, port); |
49fbabf5 | 899 | } else if (width <= 32) { |
1da177e4 | 900 | outl(value, port); |
49fbabf5 | 901 | } else { |
1da177e4 LT |
902 | BUG(); |
903 | } | |
904 | ||
905 | return AE_OK; | |
906 | } | |
4be44fcd | 907 | |
1da177e4 LT |
908 | EXPORT_SYMBOL(acpi_os_write_port); |
909 | ||
e615bf5b MS |
910 | #ifdef readq |
911 | static inline u64 read64(const volatile void __iomem *addr) | |
912 | { | |
913 | return readq(addr); | |
914 | } | |
915 | #else | |
916 | static inline u64 read64(const volatile void __iomem *addr) | |
917 | { | |
918 | u64 l, h; | |
919 | l = readl(addr); | |
920 | h = readl(addr+4); | |
921 | return l | (h << 32); | |
922 | } | |
923 | #endif | |
924 | ||
925 | acpi_status | |
653f4b53 | 926 | acpi_os_read_memory(acpi_physical_address phys_addr, u64 *value, u32 width) |
e615bf5b MS |
927 | { |
928 | void __iomem *virt_addr; | |
929 | unsigned int size = width / 8; | |
930 | bool unmap = false; | |
931 | u64 dummy; | |
932 | ||
933 | rcu_read_lock(); | |
934 | virt_addr = acpi_map_vaddr_lookup(phys_addr, size); | |
935 | if (!virt_addr) { | |
936 | rcu_read_unlock(); | |
937 | virt_addr = acpi_os_ioremap(phys_addr, size); | |
938 | if (!virt_addr) | |
939 | return AE_BAD_ADDRESS; | |
940 | unmap = true; | |
941 | } | |
942 | ||
943 | if (!value) | |
944 | value = &dummy; | |
945 | ||
946 | switch (width) { | |
947 | case 8: | |
948 | *(u8 *) value = readb(virt_addr); | |
949 | break; | |
950 | case 16: | |
951 | *(u16 *) value = readw(virt_addr); | |
952 | break; | |
953 | case 32: | |
954 | *(u32 *) value = readl(virt_addr); | |
955 | break; | |
956 | case 64: | |
957 | *(u64 *) value = read64(virt_addr); | |
958 | break; | |
959 | default: | |
960 | BUG(); | |
961 | } | |
962 | ||
963 | if (unmap) | |
964 | iounmap(virt_addr); | |
965 | else | |
966 | rcu_read_unlock(); | |
967 | ||
968 | return AE_OK; | |
969 | } | |
970 | ||
e615bf5b MS |
971 | #ifdef writeq |
972 | static inline void write64(u64 val, volatile void __iomem *addr) | |
973 | { | |
974 | writeq(val, addr); | |
975 | } | |
976 | #else | |
977 | static inline void write64(u64 val, volatile void __iomem *addr) | |
978 | { | |
979 | writel(val, addr); | |
980 | writel(val>>32, addr+4); | |
981 | } | |
982 | #endif | |
983 | ||
984 | acpi_status | |
653f4b53 | 985 | acpi_os_write_memory(acpi_physical_address phys_addr, u64 value, u32 width) |
e615bf5b MS |
986 | { |
987 | void __iomem *virt_addr; | |
988 | unsigned int size = width / 8; | |
989 | bool unmap = false; | |
990 | ||
991 | rcu_read_lock(); | |
992 | virt_addr = acpi_map_vaddr_lookup(phys_addr, size); | |
993 | if (!virt_addr) { | |
994 | rcu_read_unlock(); | |
995 | virt_addr = acpi_os_ioremap(phys_addr, size); | |
996 | if (!virt_addr) | |
997 | return AE_BAD_ADDRESS; | |
998 | unmap = true; | |
999 | } | |
1000 | ||
1001 | switch (width) { | |
1002 | case 8: | |
1003 | writeb(value, virt_addr); | |
1004 | break; | |
1005 | case 16: | |
1006 | writew(value, virt_addr); | |
1007 | break; | |
1008 | case 32: | |
1009 | writel(value, virt_addr); | |
1010 | break; | |
1011 | case 64: | |
1012 | write64(value, virt_addr); | |
1013 | break; | |
1014 | default: | |
1015 | BUG(); | |
1016 | } | |
1017 | ||
1018 | if (unmap) | |
1019 | iounmap(virt_addr); | |
1020 | else | |
1021 | rcu_read_unlock(); | |
1022 | ||
1023 | return AE_OK; | |
1024 | } | |
1025 | ||
1da177e4 | 1026 | acpi_status |
4be44fcd | 1027 | acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
c5f0231e | 1028 | u64 *value, u32 width) |
1da177e4 LT |
1029 | { |
1030 | int result, size; | |
c5f0231e | 1031 | u32 value32; |
1da177e4 LT |
1032 | |
1033 | if (!value) | |
1034 | return AE_BAD_PARAMETER; | |
1035 | ||
1036 | switch (width) { | |
1037 | case 8: | |
1038 | size = 1; | |
1039 | break; | |
1040 | case 16: | |
1041 | size = 2; | |
1042 | break; | |
1043 | case 32: | |
1044 | size = 4; | |
1045 | break; | |
1046 | default: | |
1047 | return AE_ERROR; | |
1048 | } | |
1049 | ||
b6ce068a MW |
1050 | result = raw_pci_read(pci_id->segment, pci_id->bus, |
1051 | PCI_DEVFN(pci_id->device, pci_id->function), | |
c5f0231e BM |
1052 | reg, size, &value32); |
1053 | *value = value32; | |
1da177e4 LT |
1054 | |
1055 | return (result ? AE_ERROR : AE_OK); | |
1056 | } | |
4be44fcd | 1057 | |
1da177e4 | 1058 | acpi_status |
4be44fcd | 1059 | acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg, |
439913ff | 1060 | u64 value, u32 width) |
1da177e4 LT |
1061 | { |
1062 | int result, size; | |
1063 | ||
1064 | switch (width) { | |
1065 | case 8: | |
1066 | size = 1; | |
1067 | break; | |
1068 | case 16: | |
1069 | size = 2; | |
1070 | break; | |
1071 | case 32: | |
1072 | size = 4; | |
1073 | break; | |
1074 | default: | |
1075 | return AE_ERROR; | |
1076 | } | |
1077 | ||
b6ce068a MW |
1078 | result = raw_pci_write(pci_id->segment, pci_id->bus, |
1079 | PCI_DEVFN(pci_id->device, pci_id->function), | |
1080 | reg, size, value); | |
1da177e4 LT |
1081 | |
1082 | return (result ? AE_ERROR : AE_OK); | |
1083 | } | |
1084 | ||
65f27f38 | 1085 | static void acpi_os_execute_deferred(struct work_struct *work) |
88db5e14 AS |
1086 | { |
1087 | struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work); | |
88db5e14 | 1088 | |
19cd847a ZR |
1089 | dpc->function(dpc->context); |
1090 | kfree(dpc); | |
19cd847a ZR |
1091 | } |
1092 | ||
b8d35192 AS |
1093 | /******************************************************************************* |
1094 | * | |
1095 | * FUNCTION: acpi_os_execute | |
1096 | * | |
1097 | * PARAMETERS: Type - Type of the callback | |
1098 | * Function - Function to be executed | |
1099 | * Context - Function parameters | |
1100 | * | |
1101 | * RETURN: Status | |
1102 | * | |
1103 | * DESCRIPTION: Depending on type, either queues function for deferred execution or | |
1104 | * immediately executes function on a separate thread. | |
1105 | * | |
1106 | ******************************************************************************/ | |
1107 | ||
7b98118a RW |
1108 | acpi_status acpi_os_execute(acpi_execute_type type, |
1109 | acpi_osd_exec_callback function, void *context) | |
1da177e4 | 1110 | { |
4be44fcd LB |
1111 | acpi_status status = AE_OK; |
1112 | struct acpi_os_dpc *dpc; | |
17bc54ee | 1113 | struct workqueue_struct *queue; |
19cd847a | 1114 | int ret; |
72945b2b LB |
1115 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, |
1116 | "Scheduling function [%p(%p)] for deferred execution.\n", | |
1117 | function, context)); | |
1da177e4 | 1118 | |
1da177e4 LT |
1119 | /* |
1120 | * Allocate/initialize DPC structure. Note that this memory will be | |
65f27f38 | 1121 | * freed by the callee. The kernel handles the work_struct list in a |
1da177e4 LT |
1122 | * way that allows us to also free its memory inside the callee. |
1123 | * Because we may want to schedule several tasks with different | |
1124 | * parameters we can't use the approach some kernel code uses of | |
65f27f38 | 1125 | * having a static work_struct. |
1da177e4 | 1126 | */ |
72945b2b | 1127 | |
3ae45a27 | 1128 | dpc = kzalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC); |
1da177e4 | 1129 | if (!dpc) |
889c78be | 1130 | return AE_NO_MEMORY; |
b976fe19 | 1131 | |
1da177e4 LT |
1132 | dpc->function = function; |
1133 | dpc->context = context; | |
b976fe19 | 1134 | |
c02256be | 1135 | /* |
3ae45a27 RW |
1136 | * To prevent lockdep from complaining unnecessarily, make sure that |
1137 | * there is a different static lockdep key for each workqueue by using | |
1138 | * INIT_WORK() for each of them separately. | |
c02256be | 1139 | */ |
7b98118a | 1140 | if (type == OSL_NOTIFY_HANDLER) { |
3ae45a27 | 1141 | queue = kacpi_notify_wq; |
bc73675b | 1142 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); |
3ae45a27 RW |
1143 | } else { |
1144 | queue = kacpid_wq; | |
bc73675b | 1145 | INIT_WORK(&dpc->work, acpi_os_execute_deferred); |
3ae45a27 | 1146 | } |
bc73675b | 1147 | |
8fec62b2 TH |
1148 | /* |
1149 | * On some machines, a software-initiated SMI causes corruption unless | |
1150 | * the SMI runs on CPU 0. An SMI can be initiated by any AML, but | |
1151 | * typically it's done in GPE-related methods that are run via | |
1152 | * workqueues, so we can avoid the known corruption cases by always | |
1153 | * queueing on CPU 0. | |
1154 | */ | |
1155 | ret = queue_work_on(0, queue, &dpc->work); | |
19cd847a ZR |
1156 | |
1157 | if (!ret) { | |
55ac9a01 LM |
1158 | printk(KERN_ERR PREFIX |
1159 | "Call to queue_work() failed.\n"); | |
17bc54ee AS |
1160 | status = AE_ERROR; |
1161 | kfree(dpc); | |
1da177e4 | 1162 | } |
889c78be | 1163 | return status; |
1da177e4 | 1164 | } |
7b98118a | 1165 | EXPORT_SYMBOL(acpi_os_execute); |
4be44fcd | 1166 | |
7b98118a | 1167 | void acpi_os_wait_events_complete(void) |
19cd847a | 1168 | { |
7b98118a RW |
1169 | flush_workqueue(kacpid_wq); |
1170 | flush_workqueue(kacpi_notify_wq); | |
19cd847a | 1171 | } |
1da177e4 | 1172 | |
7b98118a RW |
1173 | struct acpi_hp_work { |
1174 | struct work_struct work; | |
1175 | acpi_hp_callback func; | |
1176 | void *data; | |
1177 | u32 src; | |
1178 | }; | |
1179 | ||
1180 | static void acpi_hotplug_work_fn(struct work_struct *work) | |
19cd847a | 1181 | { |
7b98118a RW |
1182 | struct acpi_hp_work *hpw = container_of(work, struct acpi_hp_work, work); |
1183 | ||
1184 | acpi_os_wait_events_complete(); | |
1185 | hpw->func(hpw->data, hpw->src); | |
1186 | kfree(hpw); | |
19cd847a ZR |
1187 | } |
1188 | ||
7b98118a | 1189 | acpi_status acpi_hotplug_execute(acpi_hp_callback func, void *data, u32 src) |
1da177e4 | 1190 | { |
7b98118a RW |
1191 | struct acpi_hp_work *hpw; |
1192 | ||
1193 | ACPI_DEBUG_PRINT((ACPI_DB_EXEC, | |
1194 | "Scheduling function [%p(%p, %u)] for deferred execution.\n", | |
1195 | func, data, src)); | |
1196 | ||
1197 | hpw = kmalloc(sizeof(*hpw), GFP_KERNEL); | |
1198 | if (!hpw) | |
1199 | return AE_NO_MEMORY; | |
1200 | ||
1201 | INIT_WORK(&hpw->work, acpi_hotplug_work_fn); | |
1202 | hpw->func = func; | |
1203 | hpw->data = data; | |
1204 | hpw->src = src; | |
1205 | /* | |
1206 | * We can't run hotplug code in kacpid_wq/kacpid_notify_wq etc., because | |
1207 | * the hotplug code may call driver .remove() functions, which may | |
1208 | * invoke flush_scheduled_work()/acpi_os_wait_events_complete() to flush | |
1209 | * these workqueues. | |
1210 | */ | |
1211 | if (!queue_work(kacpi_hotplug_wq, &hpw->work)) { | |
1212 | kfree(hpw); | |
1213 | return AE_ERROR; | |
1214 | } | |
1215 | return AE_OK; | |
1da177e4 | 1216 | } |
4be44fcd | 1217 | |
1da177e4 | 1218 | |
1da177e4 | 1219 | acpi_status |
4be44fcd | 1220 | acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle) |
1da177e4 | 1221 | { |
4be44fcd | 1222 | struct semaphore *sem = NULL; |
1da177e4 | 1223 | |
1da177e4 LT |
1224 | sem = acpi_os_allocate(sizeof(struct semaphore)); |
1225 | if (!sem) | |
d550d98d | 1226 | return AE_NO_MEMORY; |
1da177e4 LT |
1227 | memset(sem, 0, sizeof(struct semaphore)); |
1228 | ||
1229 | sema_init(sem, initial_units); | |
1230 | ||
4be44fcd | 1231 | *handle = (acpi_handle *) sem; |
1da177e4 | 1232 | |
4be44fcd LB |
1233 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n", |
1234 | *handle, initial_units)); | |
1da177e4 | 1235 | |
d550d98d | 1236 | return AE_OK; |
1da177e4 | 1237 | } |
1da177e4 | 1238 | |
1da177e4 LT |
1239 | /* |
1240 | * TODO: A better way to delete semaphores? Linux doesn't have a | |
1241 | * 'delete_semaphore()' function -- may result in an invalid | |
1242 | * pointer dereference for non-synchronized consumers. Should | |
1243 | * we at least check for blocked threads and signal/cancel them? | |
1244 | */ | |
1245 | ||
4be44fcd | 1246 | acpi_status acpi_os_delete_semaphore(acpi_handle handle) |
1da177e4 | 1247 | { |
4be44fcd | 1248 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 1249 | |
1da177e4 | 1250 | if (!sem) |
d550d98d | 1251 | return AE_BAD_PARAMETER; |
1da177e4 | 1252 | |
4be44fcd | 1253 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle)); |
1da177e4 | 1254 | |
f1241c87 | 1255 | BUG_ON(!list_empty(&sem->wait_list)); |
02438d87 | 1256 | kfree(sem); |
4be44fcd | 1257 | sem = NULL; |
1da177e4 | 1258 | |
d550d98d | 1259 | return AE_OK; |
1da177e4 | 1260 | } |
1da177e4 | 1261 | |
1da177e4 | 1262 | /* |
1da177e4 LT |
1263 | * TODO: Support for units > 1? |
1264 | */ | |
4be44fcd | 1265 | acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout) |
1da177e4 | 1266 | { |
4be44fcd LB |
1267 | acpi_status status = AE_OK; |
1268 | struct semaphore *sem = (struct semaphore *)handle; | |
f1241c87 | 1269 | long jiffies; |
4be44fcd | 1270 | int ret = 0; |
1da177e4 | 1271 | |
1da177e4 | 1272 | if (!sem || (units < 1)) |
d550d98d | 1273 | return AE_BAD_PARAMETER; |
1da177e4 LT |
1274 | |
1275 | if (units > 1) | |
d550d98d | 1276 | return AE_SUPPORT; |
1da177e4 | 1277 | |
4be44fcd LB |
1278 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n", |
1279 | handle, units, timeout)); | |
1da177e4 | 1280 | |
f1241c87 MW |
1281 | if (timeout == ACPI_WAIT_FOREVER) |
1282 | jiffies = MAX_SCHEDULE_TIMEOUT; | |
1283 | else | |
1284 | jiffies = msecs_to_jiffies(timeout); | |
1285 | ||
1286 | ret = down_timeout(sem, jiffies); | |
1287 | if (ret) | |
1288 | status = AE_TIME; | |
1da177e4 LT |
1289 | |
1290 | if (ACPI_FAILURE(status)) { | |
9e7e2c04 | 1291 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, |
a6fc6720 | 1292 | "Failed to acquire semaphore[%p|%d|%d], %s", |
4be44fcd LB |
1293 | handle, units, timeout, |
1294 | acpi_format_exception(status))); | |
1295 | } else { | |
1296 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, | |
a6fc6720 | 1297 | "Acquired semaphore[%p|%d|%d]", handle, |
4be44fcd | 1298 | units, timeout)); |
1da177e4 LT |
1299 | } |
1300 | ||
d550d98d | 1301 | return status; |
1da177e4 | 1302 | } |
1da177e4 | 1303 | |
1da177e4 LT |
1304 | /* |
1305 | * TODO: Support for units > 1? | |
1306 | */ | |
4be44fcd | 1307 | acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units) |
1da177e4 | 1308 | { |
4be44fcd | 1309 | struct semaphore *sem = (struct semaphore *)handle; |
1da177e4 | 1310 | |
1da177e4 | 1311 | if (!sem || (units < 1)) |
d550d98d | 1312 | return AE_BAD_PARAMETER; |
1da177e4 LT |
1313 | |
1314 | if (units > 1) | |
d550d98d | 1315 | return AE_SUPPORT; |
1da177e4 | 1316 | |
4be44fcd LB |
1317 | ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle, |
1318 | units)); | |
1da177e4 LT |
1319 | |
1320 | up(sem); | |
1321 | ||
d550d98d | 1322 | return AE_OK; |
1da177e4 | 1323 | } |
4be44fcd | 1324 | |
1da177e4 | 1325 | #ifdef ACPI_FUTURE_USAGE |
4be44fcd | 1326 | u32 acpi_os_get_line(char *buffer) |
1da177e4 LT |
1327 | { |
1328 | ||
1329 | #ifdef ENABLE_DEBUGGER | |
1330 | if (acpi_in_debugger) { | |
1331 | u32 chars; | |
1332 | ||
1333 | kdb_read(buffer, sizeof(line_buf)); | |
1334 | ||
1335 | /* remove the CR kdb includes */ | |
1336 | chars = strlen(buffer) - 1; | |
1337 | buffer[chars] = '\0'; | |
1338 | } | |
1339 | #endif | |
1340 | ||
1341 | return 0; | |
1342 | } | |
4be44fcd | 1343 | #endif /* ACPI_FUTURE_USAGE */ |
1da177e4 | 1344 | |
4be44fcd | 1345 | acpi_status acpi_os_signal(u32 function, void *info) |
1da177e4 | 1346 | { |
4be44fcd | 1347 | switch (function) { |
1da177e4 LT |
1348 | case ACPI_SIGNAL_FATAL: |
1349 | printk(KERN_ERR PREFIX "Fatal opcode executed\n"); | |
1350 | break; | |
1351 | case ACPI_SIGNAL_BREAKPOINT: | |
1352 | /* | |
1353 | * AML Breakpoint | |
1354 | * ACPI spec. says to treat it as a NOP unless | |
1355 | * you are debugging. So if/when we integrate | |
1356 | * AML debugger into the kernel debugger its | |
1357 | * hook will go here. But until then it is | |
1358 | * not useful to print anything on breakpoints. | |
1359 | */ | |
1360 | break; | |
1361 | default: | |
1362 | break; | |
1363 | } | |
1364 | ||
1365 | return AE_OK; | |
1366 | } | |
4be44fcd | 1367 | |
4be44fcd | 1368 | static int __init acpi_os_name_setup(char *str) |
1da177e4 LT |
1369 | { |
1370 | char *p = acpi_os_name; | |
4be44fcd | 1371 | int count = ACPI_MAX_OVERRIDE_LEN - 1; |
1da177e4 LT |
1372 | |
1373 | if (!str || !*str) | |
1374 | return 0; | |
1375 | ||
5e2be4e0 | 1376 | for (; count-- && *str; str++) { |
1da177e4 LT |
1377 | if (isalnum(*str) || *str == ' ' || *str == ':') |
1378 | *p++ = *str; | |
1379 | else if (*str == '\'' || *str == '"') | |
1380 | continue; | |
1381 | else | |
1382 | break; | |
1383 | } | |
1384 | *p = 0; | |
1385 | ||
1386 | return 1; | |
4be44fcd | 1387 | |
1da177e4 LT |
1388 | } |
1389 | ||
1390 | __setup("acpi_os_name=", acpi_os_name_setup); | |
1391 | ||
12d32064 LM |
1392 | #define OSI_STRING_LENGTH_MAX 64 /* arbitrary */ |
1393 | #define OSI_STRING_ENTRIES_MAX 16 /* arbitrary */ | |
1394 | ||
1395 | struct osi_setup_entry { | |
1396 | char string[OSI_STRING_LENGTH_MAX]; | |
1397 | bool enable; | |
1398 | }; | |
1399 | ||
e73d3136 HG |
1400 | static struct osi_setup_entry |
1401 | osi_setup_entries[OSI_STRING_ENTRIES_MAX] __initdata = { | |
aa165971 SL |
1402 | {"Module Device", true}, |
1403 | {"Processor Device", true}, | |
1404 | {"3.0 _SCP Extensions", true}, | |
1405 | {"Processor Aggregator Device", true}, | |
1406 | }; | |
12d32064 | 1407 | |
d90aa92c LM |
1408 | void __init acpi_osi_setup(char *str) |
1409 | { | |
12d32064 LM |
1410 | struct osi_setup_entry *osi; |
1411 | bool enable = true; | |
1412 | int i; | |
1413 | ||
d90aa92c LM |
1414 | if (!acpi_gbl_create_osi_method) |
1415 | return; | |
1416 | ||
1417 | if (str == NULL || *str == '\0') { | |
1418 | printk(KERN_INFO PREFIX "_OSI method disabled\n"); | |
1419 | acpi_gbl_create_osi_method = FALSE; | |
12d32064 LM |
1420 | return; |
1421 | } | |
1422 | ||
1423 | if (*str == '!') { | |
1424 | str++; | |
5dc17986 LZ |
1425 | if (*str == '\0') { |
1426 | osi_linux.default_disabling = 1; | |
1427 | return; | |
741d8128 LZ |
1428 | } else if (*str == '*') { |
1429 | acpi_update_interfaces(ACPI_DISABLE_ALL_STRINGS); | |
1430 | for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { | |
1431 | osi = &osi_setup_entries[i]; | |
1432 | osi->enable = false; | |
1433 | } | |
1434 | return; | |
5dc17986 | 1435 | } |
12d32064 LM |
1436 | enable = false; |
1437 | } | |
1438 | ||
1439 | for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { | |
1440 | osi = &osi_setup_entries[i]; | |
1441 | if (!strcmp(osi->string, str)) { | |
1442 | osi->enable = enable; | |
1443 | break; | |
1444 | } else if (osi->string[0] == '\0') { | |
1445 | osi->enable = enable; | |
1446 | strncpy(osi->string, str, OSI_STRING_LENGTH_MAX); | |
1447 | break; | |
1448 | } | |
1449 | } | |
d90aa92c LM |
1450 | } |
1451 | ||
d4b7dc49 LB |
1452 | static void __init set_osi_linux(unsigned int enable) |
1453 | { | |
d90aa92c | 1454 | if (osi_linux.enable != enable) |
d4b7dc49 | 1455 | osi_linux.enable = enable; |
b0ed7a91 LM |
1456 | |
1457 | if (osi_linux.enable) | |
1458 | acpi_osi_setup("Linux"); | |
1459 | else | |
1460 | acpi_osi_setup("!Linux"); | |
1461 | ||
d4b7dc49 LB |
1462 | return; |
1463 | } | |
1464 | ||
1465 | static void __init acpi_cmdline_osi_linux(unsigned int enable) | |
1466 | { | |
d90aa92c LM |
1467 | osi_linux.cmdline = 1; /* cmdline set the default and override DMI */ |
1468 | osi_linux.dmi = 0; | |
d4b7dc49 LB |
1469 | set_osi_linux(enable); |
1470 | ||
1471 | return; | |
1472 | } | |
1473 | ||
1474 | void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d) | |
1475 | { | |
d4b7dc49 LB |
1476 | printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident); |
1477 | ||
1478 | if (enable == -1) | |
1479 | return; | |
1480 | ||
d90aa92c | 1481 | osi_linux.dmi = 1; /* DMI knows that this box asks OSI(Linux) */ |
d4b7dc49 | 1482 | set_osi_linux(enable); |
f507654d | 1483 | |
f507654d LB |
1484 | return; |
1485 | } | |
1486 | ||
1da177e4 | 1487 | /* |
ae00d812 LB |
1488 | * Modify the list of "OS Interfaces" reported to BIOS via _OSI |
1489 | * | |
1da177e4 | 1490 | * empty string disables _OSI |
ae00d812 LB |
1491 | * string starting with '!' disables that string |
1492 | * otherwise string is added to list, augmenting built-in strings | |
1da177e4 | 1493 | */ |
b0ed7a91 | 1494 | static void __init acpi_osi_setup_late(void) |
1da177e4 | 1495 | { |
12d32064 LM |
1496 | struct osi_setup_entry *osi; |
1497 | char *str; | |
1498 | int i; | |
d90aa92c | 1499 | acpi_status status; |
b0ed7a91 | 1500 | |
5dc17986 LZ |
1501 | if (osi_linux.default_disabling) { |
1502 | status = acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS); | |
1503 | ||
1504 | if (ACPI_SUCCESS(status)) | |
1505 | printk(KERN_INFO PREFIX "Disabled all _OSI OS vendors\n"); | |
1506 | } | |
1507 | ||
12d32064 LM |
1508 | for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) { |
1509 | osi = &osi_setup_entries[i]; | |
1510 | str = osi->string; | |
b0ed7a91 | 1511 | |
12d32064 LM |
1512 | if (*str == '\0') |
1513 | break; | |
1514 | if (osi->enable) { | |
1515 | status = acpi_install_interface(str); | |
d90aa92c | 1516 | |
12d32064 LM |
1517 | if (ACPI_SUCCESS(status)) |
1518 | printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str); | |
1519 | } else { | |
1520 | status = acpi_remove_interface(str); | |
d90aa92c | 1521 | |
12d32064 LM |
1522 | if (ACPI_SUCCESS(status)) |
1523 | printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str); | |
1524 | } | |
b0ed7a91 LM |
1525 | } |
1526 | } | |
1527 | ||
d90aa92c | 1528 | static int __init osi_setup(char *str) |
b0ed7a91 | 1529 | { |
d90aa92c LM |
1530 | if (str && !strcmp("Linux", str)) |
1531 | acpi_cmdline_osi_linux(1); | |
1532 | else if (str && !strcmp("!Linux", str)) | |
1533 | acpi_cmdline_osi_linux(0); | |
1534 | else | |
1535 | acpi_osi_setup(str); | |
1da177e4 LT |
1536 | |
1537 | return 1; | |
1538 | } | |
1539 | ||
d90aa92c | 1540 | __setup("acpi_osi=", osi_setup); |
1da177e4 LT |
1541 | |
1542 | /* enable serialization to combat AE_ALREADY_EXISTS errors */ | |
4be44fcd | 1543 | static int __init acpi_serialize_setup(char *str) |
1da177e4 LT |
1544 | { |
1545 | printk(KERN_INFO PREFIX "serialize enabled\n"); | |
1546 | ||
1547 | acpi_gbl_all_methods_serialized = TRUE; | |
1548 | ||
1549 | return 1; | |
1550 | } | |
1551 | ||
1552 | __setup("acpi_serialize", acpi_serialize_setup); | |
1553 | ||
df92e695 TR |
1554 | /* Check of resource interference between native drivers and ACPI |
1555 | * OperationRegions (SystemIO and System Memory only). | |
1556 | * IO ports and memory declared in ACPI might be used by the ACPI subsystem | |
1557 | * in arbitrary AML code and can interfere with legacy drivers. | |
1558 | * acpi_enforce_resources= can be set to: | |
1559 | * | |
7e90560c | 1560 | * - strict (default) (2) |
df92e695 | 1561 | * -> further driver trying to access the resources will not load |
7e90560c | 1562 | * - lax (1) |
df92e695 TR |
1563 | * -> further driver trying to access the resources will load, but you |
1564 | * get a system message that something might go wrong... | |
1565 | * | |
1566 | * - no (0) | |
1567 | * -> ACPI Operation Region resources will not be registered | |
1568 | * | |
1569 | */ | |
1570 | #define ENFORCE_RESOURCES_STRICT 2 | |
1571 | #define ENFORCE_RESOURCES_LAX 1 | |
1572 | #define ENFORCE_RESOURCES_NO 0 | |
1573 | ||
7e90560c | 1574 | static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; |
df92e695 TR |
1575 | |
1576 | static int __init acpi_enforce_resources_setup(char *str) | |
1577 | { | |
1578 | if (str == NULL || *str == '\0') | |
1579 | return 0; | |
1580 | ||
1581 | if (!strcmp("strict", str)) | |
1582 | acpi_enforce_resources = ENFORCE_RESOURCES_STRICT; | |
1583 | else if (!strcmp("lax", str)) | |
1584 | acpi_enforce_resources = ENFORCE_RESOURCES_LAX; | |
1585 | else if (!strcmp("no", str)) | |
1586 | acpi_enforce_resources = ENFORCE_RESOURCES_NO; | |
1587 | ||
1588 | return 1; | |
1589 | } | |
1590 | ||
1591 | __setup("acpi_enforce_resources=", acpi_enforce_resources_setup); | |
1592 | ||
1593 | /* Check for resource conflicts between ACPI OperationRegions and native | |
1594 | * drivers */ | |
876fba43 | 1595 | int acpi_check_resource_conflict(const struct resource *res) |
df92e695 | 1596 | { |
f654c0fe LM |
1597 | acpi_adr_space_type space_id; |
1598 | acpi_size length; | |
1599 | u8 warn = 0; | |
1600 | int clash = 0; | |
df92e695 TR |
1601 | |
1602 | if (acpi_enforce_resources == ENFORCE_RESOURCES_NO) | |
1603 | return 0; | |
1604 | if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM)) | |
1605 | return 0; | |
1606 | ||
f654c0fe LM |
1607 | if (res->flags & IORESOURCE_IO) |
1608 | space_id = ACPI_ADR_SPACE_SYSTEM_IO; | |
1609 | else | |
1610 | space_id = ACPI_ADR_SPACE_SYSTEM_MEMORY; | |
df92e695 | 1611 | |
e4f52244 | 1612 | length = resource_size(res); |
f654c0fe LM |
1613 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) |
1614 | warn = 1; | |
1615 | clash = acpi_check_address_range(space_id, res->start, length, warn); | |
df92e695 TR |
1616 | |
1617 | if (clash) { | |
1618 | if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) { | |
14f03343 JD |
1619 | if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX) |
1620 | printk(KERN_NOTICE "ACPI: This conflict may" | |
1621 | " cause random problems and system" | |
1622 | " instability\n"); | |
1623 | printk(KERN_INFO "ACPI: If an ACPI driver is available" | |
1624 | " for this device, you should use it instead of" | |
1625 | " the native driver\n"); | |
df92e695 TR |
1626 | } |
1627 | if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT) | |
1628 | return -EBUSY; | |
1629 | } | |
1630 | return 0; | |
1631 | } | |
443dea72 | 1632 | EXPORT_SYMBOL(acpi_check_resource_conflict); |
df92e695 TR |
1633 | |
1634 | int acpi_check_region(resource_size_t start, resource_size_t n, | |
1635 | const char *name) | |
1636 | { | |
1637 | struct resource res = { | |
1638 | .start = start, | |
1639 | .end = start + n - 1, | |
1640 | .name = name, | |
1641 | .flags = IORESOURCE_IO, | |
1642 | }; | |
1643 | ||
1644 | return acpi_check_resource_conflict(&res); | |
1645 | } | |
1646 | EXPORT_SYMBOL(acpi_check_region); | |
1647 | ||
70dd6bea JD |
1648 | /* |
1649 | * Let drivers know whether the resource checks are effective | |
1650 | */ | |
1651 | int acpi_resources_are_enforced(void) | |
1652 | { | |
1653 | return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT; | |
1654 | } | |
1655 | EXPORT_SYMBOL(acpi_resources_are_enforced); | |
1656 | ||
9f63b88b LM |
1657 | /* |
1658 | * Deallocate the memory for a spinlock. | |
1659 | */ | |
1660 | void acpi_os_delete_lock(acpi_spinlock handle) | |
1661 | { | |
1662 | ACPI_FREE(handle); | |
1663 | } | |
1664 | ||
73459f73 RM |
1665 | /* |
1666 | * Acquire a spinlock. | |
1667 | * | |
1668 | * handle is a pointer to the spinlock_t. | |
73459f73 RM |
1669 | */ |
1670 | ||
967440e3 | 1671 | acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp) |
73459f73 | 1672 | { |
b8e4d893 | 1673 | acpi_cpu_flags flags; |
967440e3 | 1674 | spin_lock_irqsave(lockp, flags); |
73459f73 RM |
1675 | return flags; |
1676 | } | |
1677 | ||
1678 | /* | |
1679 | * Release a spinlock. See above. | |
1680 | */ | |
1681 | ||
967440e3 | 1682 | void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags) |
73459f73 | 1683 | { |
967440e3 | 1684 | spin_unlock_irqrestore(lockp, flags); |
73459f73 RM |
1685 | } |
1686 | ||
73459f73 RM |
1687 | #ifndef ACPI_USE_LOCAL_CACHE |
1688 | ||
1689 | /******************************************************************************* | |
1690 | * | |
1691 | * FUNCTION: acpi_os_create_cache | |
1692 | * | |
b229cf92 BM |
1693 | * PARAMETERS: name - Ascii name for the cache |
1694 | * size - Size of each cached object | |
1695 | * depth - Maximum depth of the cache (in objects) <ignored> | |
1696 | * cache - Where the new cache object is returned | |
73459f73 | 1697 | * |
b229cf92 | 1698 | * RETURN: status |
73459f73 RM |
1699 | * |
1700 | * DESCRIPTION: Create a cache object | |
1701 | * | |
1702 | ******************************************************************************/ | |
1703 | ||
1704 | acpi_status | |
4be44fcd | 1705 | acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache) |
73459f73 | 1706 | { |
20c2df83 | 1707 | *cache = kmem_cache_create(name, size, 0, 0, NULL); |
a6fdbf90 | 1708 | if (*cache == NULL) |
b229cf92 BM |
1709 | return AE_ERROR; |
1710 | else | |
1711 | return AE_OK; | |
73459f73 RM |
1712 | } |
1713 | ||
1714 | /******************************************************************************* | |
1715 | * | |
1716 | * FUNCTION: acpi_os_purge_cache | |
1717 | * | |
1718 | * PARAMETERS: Cache - Handle to cache object | |
1719 | * | |
1720 | * RETURN: Status | |
1721 | * | |
1722 | * DESCRIPTION: Free all objects within the requested cache. | |
1723 | * | |
1724 | ******************************************************************************/ | |
1725 | ||
4be44fcd | 1726 | acpi_status acpi_os_purge_cache(acpi_cache_t * cache) |
73459f73 | 1727 | { |
50dd0969 | 1728 | kmem_cache_shrink(cache); |
4be44fcd | 1729 | return (AE_OK); |
73459f73 RM |
1730 | } |
1731 | ||
1732 | /******************************************************************************* | |
1733 | * | |
1734 | * FUNCTION: acpi_os_delete_cache | |
1735 | * | |
1736 | * PARAMETERS: Cache - Handle to cache object | |
1737 | * | |
1738 | * RETURN: Status | |
1739 | * | |
1740 | * DESCRIPTION: Free all objects within the requested cache and delete the | |
1741 | * cache object. | |
1742 | * | |
1743 | ******************************************************************************/ | |
1744 | ||
4be44fcd | 1745 | acpi_status acpi_os_delete_cache(acpi_cache_t * cache) |
73459f73 | 1746 | { |
1a1d92c1 | 1747 | kmem_cache_destroy(cache); |
4be44fcd | 1748 | return (AE_OK); |
73459f73 RM |
1749 | } |
1750 | ||
1751 | /******************************************************************************* | |
1752 | * | |
1753 | * FUNCTION: acpi_os_release_object | |
1754 | * | |
1755 | * PARAMETERS: Cache - Handle to cache object | |
1756 | * Object - The object to be released | |
1757 | * | |
1758 | * RETURN: None | |
1759 | * | |
1760 | * DESCRIPTION: Release an object to the specified cache. If cache is full, | |
1761 | * the object is deleted. | |
1762 | * | |
1763 | ******************************************************************************/ | |
1764 | ||
4be44fcd | 1765 | acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object) |
73459f73 | 1766 | { |
4be44fcd LB |
1767 | kmem_cache_free(cache, object); |
1768 | return (AE_OK); | |
73459f73 | 1769 | } |
73459f73 | 1770 | #endif |
d362edaf | 1771 | |
b75dd297 LZ |
1772 | static int __init acpi_no_auto_ssdt_setup(char *s) |
1773 | { | |
1774 | printk(KERN_NOTICE PREFIX "SSDT auto-load disabled\n"); | |
1775 | ||
1776 | acpi_gbl_disable_ssdt_table_load = TRUE; | |
1777 | ||
1778 | return 1; | |
1779 | } | |
1780 | ||
1781 | __setup("acpi_no_auto_ssdt", acpi_no_auto_ssdt_setup); | |
1782 | ||
d362edaf MS |
1783 | acpi_status __init acpi_os_initialize(void) |
1784 | { | |
1785 | acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block); | |
1786 | acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block); | |
1787 | acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block); | |
1788 | acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block); | |
1789 | ||
1790 | return AE_OK; | |
1791 | } | |
1792 | ||
32d47eef | 1793 | acpi_status __init acpi_os_initialize1(void) |
d362edaf | 1794 | { |
44d2588e TH |
1795 | kacpid_wq = alloc_workqueue("kacpid", 0, 1); |
1796 | kacpi_notify_wq = alloc_workqueue("kacpi_notify", 0, 1); | |
1797 | kacpi_hotplug_wq = alloc_workqueue("kacpi_hotplug", 0, 1); | |
d362edaf MS |
1798 | BUG_ON(!kacpid_wq); |
1799 | BUG_ON(!kacpi_notify_wq); | |
1800 | BUG_ON(!kacpi_hotplug_wq); | |
1bd64d42 LB |
1801 | acpi_install_interface_handler(acpi_osi_handler); |
1802 | acpi_osi_setup_late(); | |
d362edaf MS |
1803 | return AE_OK; |
1804 | } | |
1805 | ||
1806 | acpi_status acpi_os_terminate(void) | |
1807 | { | |
1808 | if (acpi_irq_handler) { | |
23fe3630 | 1809 | acpi_os_remove_interrupt_handler(acpi_gbl_FADT.sci_interrupt, |
d362edaf MS |
1810 | acpi_irq_handler); |
1811 | } | |
1812 | ||
1813 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe1_block); | |
1814 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block); | |
1815 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block); | |
1816 | acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block); | |
1817 | ||
1818 | destroy_workqueue(kacpid_wq); | |
1819 | destroy_workqueue(kacpi_notify_wq); | |
1820 | destroy_workqueue(kacpi_hotplug_wq); | |
1821 | ||
1822 | return AE_OK; | |
1823 | } | |
09f98a82 TL |
1824 | |
1825 | acpi_status acpi_os_prepare_sleep(u8 sleep_state, u32 pm1a_control, | |
1826 | u32 pm1b_control) | |
1827 | { | |
1828 | int rc = 0; | |
1829 | if (__acpi_os_prepare_sleep) | |
1830 | rc = __acpi_os_prepare_sleep(sleep_state, | |
1831 | pm1a_control, pm1b_control); | |
1832 | if (rc < 0) | |
1833 | return AE_ERROR; | |
1834 | else if (rc > 0) | |
1835 | return AE_CTRL_SKIP; | |
1836 | ||
1837 | return AE_OK; | |
1838 | } | |
1839 | ||
1840 | void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state, | |
1841 | u32 pm1a_ctrl, u32 pm1b_ctrl)) | |
1842 | { | |
1843 | __acpi_os_prepare_sleep = func; | |
1844 | } | |
92d8aff3 | 1845 | |
d6b47b12 BG |
1846 | acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state, u32 val_a, |
1847 | u32 val_b) | |
1848 | { | |
1849 | int rc = 0; | |
1850 | if (__acpi_os_prepare_extended_sleep) | |
1851 | rc = __acpi_os_prepare_extended_sleep(sleep_state, | |
1852 | val_a, val_b); | |
1853 | if (rc < 0) | |
1854 | return AE_ERROR; | |
1855 | else if (rc > 0) | |
1856 | return AE_CTRL_SKIP; | |
1857 | ||
1858 | return AE_OK; | |
1859 | } | |
1860 | ||
1861 | void acpi_os_set_prepare_extended_sleep(int (*func)(u8 sleep_state, | |
1862 | u32 val_a, u32 val_b)) | |
1863 | { | |
1864 | __acpi_os_prepare_extended_sleep = func; | |
1865 | } |