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mm, cma: prevent nr_isolated_* counters from going negative
[deliverable/linux.git] / drivers / acpi / osl.c
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>
7 * Copyright (c) 2008 Intel Corporation
8 * Author: Matthew Wilcox <willy@linux.intel.com>
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 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
23 *
24 */
25
26 #include <linux/module.h>
27 #include <linux/kernel.h>
28 #include <linux/slab.h>
29 #include <linux/mm.h>
30 #include <linux/highmem.h>
31 #include <linux/pci.h>
32 #include <linux/interrupt.h>
33 #include <linux/kmod.h>
34 #include <linux/delay.h>
35 #include <linux/workqueue.h>
36 #include <linux/nmi.h>
37 #include <linux/acpi.h>
38 #include <linux/efi.h>
39 #include <linux/ioport.h>
40 #include <linux/list.h>
41 #include <linux/jiffies.h>
42 #include <linux/semaphore.h>
43
44 #include <asm/io.h>
45 #include <asm/uaccess.h>
46 #include <linux/io-64-nonatomic-lo-hi.h>
47
48 #include "internal.h"
49
50 #define _COMPONENT ACPI_OS_SERVICES
51 ACPI_MODULE_NAME("osl");
52
53 struct acpi_os_dpc {
54 acpi_osd_exec_callback function;
55 void *context;
56 struct work_struct work;
57 };
58
59 #ifdef CONFIG_ACPI_CUSTOM_DSDT
60 #include CONFIG_ACPI_CUSTOM_DSDT_FILE
61 #endif
62
63 #ifdef ENABLE_DEBUGGER
64 #include <linux/kdb.h>
65
66 /* stuff for debugger support */
67 int acpi_in_debugger;
68 EXPORT_SYMBOL(acpi_in_debugger);
69 #endif /*ENABLE_DEBUGGER */
70
71 static int (*__acpi_os_prepare_sleep)(u8 sleep_state, u32 pm1a_ctrl,
72 u32 pm1b_ctrl);
73 static int (*__acpi_os_prepare_extended_sleep)(u8 sleep_state, u32 val_a,
74 u32 val_b);
75
76 static acpi_osd_handler acpi_irq_handler;
77 static void *acpi_irq_context;
78 static struct workqueue_struct *kacpid_wq;
79 static struct workqueue_struct *kacpi_notify_wq;
80 static struct workqueue_struct *kacpi_hotplug_wq;
81 static bool acpi_os_initialized;
82 unsigned int acpi_sci_irq = INVALID_ACPI_IRQ;
83
84 /*
85 * This list of permanent mappings is for memory that may be accessed from
86 * interrupt context, where we can't do the ioremap().
87 */
88 struct acpi_ioremap {
89 struct list_head list;
90 void __iomem *virt;
91 acpi_physical_address phys;
92 acpi_size size;
93 unsigned long refcount;
94 };
95
96 static LIST_HEAD(acpi_ioremaps);
97 static DEFINE_MUTEX(acpi_ioremap_lock);
98
99 static void __init acpi_osi_setup_late(void);
100
101 /*
102 * The story of _OSI(Linux)
103 *
104 * From pre-history through Linux-2.6.22,
105 * Linux responded TRUE upon a BIOS OSI(Linux) query.
106 *
107 * Unfortunately, reference BIOS writers got wind of this
108 * and put OSI(Linux) in their example code, quickly exposing
109 * this string as ill-conceived and opening the door to
110 * an un-bounded number of BIOS incompatibilities.
111 *
112 * For example, OSI(Linux) was used on resume to re-POST a
113 * video card on one system, because Linux at that time
114 * could not do a speedy restore in its native driver.
115 * But then upon gaining quick native restore capability,
116 * Linux has no way to tell the BIOS to skip the time-consuming
117 * POST -- putting Linux at a permanent performance disadvantage.
118 * On another system, the BIOS writer used OSI(Linux)
119 * to infer native OS support for IPMI! On other systems,
120 * OSI(Linux) simply got in the way of Linux claiming to
121 * be compatible with other operating systems, exposing
122 * BIOS issues such as skipped device initialization.
123 *
124 * So "Linux" turned out to be a really poor chose of
125 * OSI string, and from Linux-2.6.23 onward we respond FALSE.
126 *
127 * BIOS writers should NOT query _OSI(Linux) on future systems.
128 * Linux will complain on the console when it sees it, and return FALSE.
129 * To get Linux to return TRUE for your system will require
130 * a kernel source update to add a DMI entry,
131 * or boot with "acpi_osi=Linux"
132 */
133
134 static struct osi_linux {
135 unsigned int enable:1;
136 unsigned int dmi:1;
137 unsigned int cmdline:1;
138 unsigned int default_disabling:1;
139 } osi_linux = {0, 0, 0, 0};
140
141 static u32 acpi_osi_handler(acpi_string interface, u32 supported)
142 {
143 if (!strcmp("Linux", interface)) {
144
145 printk_once(KERN_NOTICE FW_BUG PREFIX
146 "BIOS _OSI(Linux) query %s%s\n",
147 osi_linux.enable ? "honored" : "ignored",
148 osi_linux.cmdline ? " via cmdline" :
149 osi_linux.dmi ? " via DMI" : "");
150 }
151
152 if (!strcmp("Darwin", interface)) {
153 /*
154 * Apple firmware will behave poorly if it receives positive
155 * answers to "Darwin" and any other OS. Respond positively
156 * to Darwin and then disable all other vendor strings.
157 */
158 acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS);
159 supported = ACPI_UINT32_MAX;
160 }
161
162 return supported;
163 }
164
165 static void __init acpi_request_region (struct acpi_generic_address *gas,
166 unsigned int length, char *desc)
167 {
168 u64 addr;
169
170 /* Handle possible alignment issues */
171 memcpy(&addr, &gas->address, sizeof(addr));
172 if (!addr || !length)
173 return;
174
175 /* Resources are never freed */
176 if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_IO)
177 request_region(addr, length, desc);
178 else if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY)
179 request_mem_region(addr, length, desc);
180 }
181
182 static int __init acpi_reserve_resources(void)
183 {
184 acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length,
185 "ACPI PM1a_EVT_BLK");
186
187 acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length,
188 "ACPI PM1b_EVT_BLK");
189
190 acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length,
191 "ACPI PM1a_CNT_BLK");
192
193 acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length,
194 "ACPI PM1b_CNT_BLK");
195
196 if (acpi_gbl_FADT.pm_timer_length == 4)
197 acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR");
198
199 acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length,
200 "ACPI PM2_CNT_BLK");
201
202 /* Length of GPE blocks must be a non-negative multiple of 2 */
203
204 if (!(acpi_gbl_FADT.gpe0_block_length & 0x1))
205 acpi_request_region(&acpi_gbl_FADT.xgpe0_block,
206 acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK");
207
208 if (!(acpi_gbl_FADT.gpe1_block_length & 0x1))
209 acpi_request_region(&acpi_gbl_FADT.xgpe1_block,
210 acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK");
211
212 return 0;
213 }
214 fs_initcall_sync(acpi_reserve_resources);
215
216 void acpi_os_printf(const char *fmt, ...)
217 {
218 va_list args;
219 va_start(args, fmt);
220 acpi_os_vprintf(fmt, args);
221 va_end(args);
222 }
223 EXPORT_SYMBOL(acpi_os_printf);
224
225 void acpi_os_vprintf(const char *fmt, va_list args)
226 {
227 static char buffer[512];
228
229 vsprintf(buffer, fmt, args);
230
231 #ifdef ENABLE_DEBUGGER
232 if (acpi_in_debugger) {
233 kdb_printf("%s", buffer);
234 } else {
235 printk(KERN_CONT "%s", buffer);
236 }
237 #else
238 if (acpi_debugger_write_log(buffer) < 0)
239 printk(KERN_CONT "%s", buffer);
240 #endif
241 }
242
243 #ifdef CONFIG_KEXEC
244 static unsigned long acpi_rsdp;
245 static int __init setup_acpi_rsdp(char *arg)
246 {
247 if (kstrtoul(arg, 16, &acpi_rsdp))
248 return -EINVAL;
249 return 0;
250 }
251 early_param("acpi_rsdp", setup_acpi_rsdp);
252 #endif
253
254 acpi_physical_address __init acpi_os_get_root_pointer(void)
255 {
256 #ifdef CONFIG_KEXEC
257 if (acpi_rsdp)
258 return acpi_rsdp;
259 #endif
260
261 if (efi_enabled(EFI_CONFIG_TABLES)) {
262 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
263 return efi.acpi20;
264 else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
265 return efi.acpi;
266 else {
267 printk(KERN_ERR PREFIX
268 "System description tables not found\n");
269 return 0;
270 }
271 } else if (IS_ENABLED(CONFIG_ACPI_LEGACY_TABLES_LOOKUP)) {
272 acpi_physical_address pa = 0;
273
274 acpi_find_root_pointer(&pa);
275 return pa;
276 }
277
278 return 0;
279 }
280
281 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
282 static struct acpi_ioremap *
283 acpi_map_lookup(acpi_physical_address phys, acpi_size size)
284 {
285 struct acpi_ioremap *map;
286
287 list_for_each_entry_rcu(map, &acpi_ioremaps, list)
288 if (map->phys <= phys &&
289 phys + size <= map->phys + map->size)
290 return map;
291
292 return NULL;
293 }
294
295 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
296 static void __iomem *
297 acpi_map_vaddr_lookup(acpi_physical_address phys, unsigned int size)
298 {
299 struct acpi_ioremap *map;
300
301 map = acpi_map_lookup(phys, size);
302 if (map)
303 return map->virt + (phys - map->phys);
304
305 return NULL;
306 }
307
308 void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size)
309 {
310 struct acpi_ioremap *map;
311 void __iomem *virt = NULL;
312
313 mutex_lock(&acpi_ioremap_lock);
314 map = acpi_map_lookup(phys, size);
315 if (map) {
316 virt = map->virt + (phys - map->phys);
317 map->refcount++;
318 }
319 mutex_unlock(&acpi_ioremap_lock);
320 return virt;
321 }
322 EXPORT_SYMBOL_GPL(acpi_os_get_iomem);
323
324 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
325 static struct acpi_ioremap *
326 acpi_map_lookup_virt(void __iomem *virt, acpi_size size)
327 {
328 struct acpi_ioremap *map;
329
330 list_for_each_entry_rcu(map, &acpi_ioremaps, list)
331 if (map->virt <= virt &&
332 virt + size <= map->virt + map->size)
333 return map;
334
335 return NULL;
336 }
337
338 #if defined(CONFIG_IA64) || defined(CONFIG_ARM64)
339 /* ioremap will take care of cache attributes */
340 #define should_use_kmap(pfn) 0
341 #else
342 #define should_use_kmap(pfn) page_is_ram(pfn)
343 #endif
344
345 static void __iomem *acpi_map(acpi_physical_address pg_off, unsigned long pg_sz)
346 {
347 unsigned long pfn;
348
349 pfn = pg_off >> PAGE_SHIFT;
350 if (should_use_kmap(pfn)) {
351 if (pg_sz > PAGE_SIZE)
352 return NULL;
353 return (void __iomem __force *)kmap(pfn_to_page(pfn));
354 } else
355 return acpi_os_ioremap(pg_off, pg_sz);
356 }
357
358 static void acpi_unmap(acpi_physical_address pg_off, void __iomem *vaddr)
359 {
360 unsigned long pfn;
361
362 pfn = pg_off >> PAGE_SHIFT;
363 if (should_use_kmap(pfn))
364 kunmap(pfn_to_page(pfn));
365 else
366 iounmap(vaddr);
367 }
368
369 /**
370 * acpi_os_map_iomem - Get a virtual address for a given physical address range.
371 * @phys: Start of the physical address range to map.
372 * @size: Size of the physical address range to map.
373 *
374 * Look up the given physical address range in the list of existing ACPI memory
375 * mappings. If found, get a reference to it and return a pointer to it (its
376 * virtual address). If not found, map it, add it to that list and return a
377 * pointer to it.
378 *
379 * During early init (when acpi_gbl_permanent_mmap has not been set yet) this
380 * routine simply calls __acpi_map_table() to get the job done.
381 */
382 void __iomem *__init_refok
383 acpi_os_map_iomem(acpi_physical_address phys, acpi_size size)
384 {
385 struct acpi_ioremap *map;
386 void __iomem *virt;
387 acpi_physical_address pg_off;
388 acpi_size pg_sz;
389
390 if (phys > ULONG_MAX) {
391 printk(KERN_ERR PREFIX "Cannot map memory that high\n");
392 return NULL;
393 }
394
395 if (!acpi_gbl_permanent_mmap)
396 return __acpi_map_table((unsigned long)phys, size);
397
398 mutex_lock(&acpi_ioremap_lock);
399 /* Check if there's a suitable mapping already. */
400 map = acpi_map_lookup(phys, size);
401 if (map) {
402 map->refcount++;
403 goto out;
404 }
405
406 map = kzalloc(sizeof(*map), GFP_KERNEL);
407 if (!map) {
408 mutex_unlock(&acpi_ioremap_lock);
409 return NULL;
410 }
411
412 pg_off = round_down(phys, PAGE_SIZE);
413 pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off;
414 virt = acpi_map(pg_off, pg_sz);
415 if (!virt) {
416 mutex_unlock(&acpi_ioremap_lock);
417 kfree(map);
418 return NULL;
419 }
420
421 INIT_LIST_HEAD(&map->list);
422 map->virt = virt;
423 map->phys = pg_off;
424 map->size = pg_sz;
425 map->refcount = 1;
426
427 list_add_tail_rcu(&map->list, &acpi_ioremaps);
428
429 out:
430 mutex_unlock(&acpi_ioremap_lock);
431 return map->virt + (phys - map->phys);
432 }
433 EXPORT_SYMBOL_GPL(acpi_os_map_iomem);
434
435 void *__init_refok
436 acpi_os_map_memory(acpi_physical_address phys, acpi_size size)
437 {
438 return (void *)acpi_os_map_iomem(phys, size);
439 }
440 EXPORT_SYMBOL_GPL(acpi_os_map_memory);
441
442 static void acpi_os_drop_map_ref(struct acpi_ioremap *map)
443 {
444 if (!--map->refcount)
445 list_del_rcu(&map->list);
446 }
447
448 static void acpi_os_map_cleanup(struct acpi_ioremap *map)
449 {
450 if (!map->refcount) {
451 synchronize_rcu_expedited();
452 acpi_unmap(map->phys, map->virt);
453 kfree(map);
454 }
455 }
456
457 /**
458 * acpi_os_unmap_iomem - Drop a memory mapping reference.
459 * @virt: Start of the address range to drop a reference to.
460 * @size: Size of the address range to drop a reference to.
461 *
462 * Look up the given virtual address range in the list of existing ACPI memory
463 * mappings, drop a reference to it and unmap it if there are no more active
464 * references to it.
465 *
466 * During early init (when acpi_gbl_permanent_mmap has not been set yet) this
467 * routine simply calls __acpi_unmap_table() to get the job done. Since
468 * __acpi_unmap_table() is an __init function, the __ref annotation is needed
469 * here.
470 */
471 void __ref acpi_os_unmap_iomem(void __iomem *virt, acpi_size size)
472 {
473 struct acpi_ioremap *map;
474
475 if (!acpi_gbl_permanent_mmap) {
476 __acpi_unmap_table(virt, size);
477 return;
478 }
479
480 mutex_lock(&acpi_ioremap_lock);
481 map = acpi_map_lookup_virt(virt, size);
482 if (!map) {
483 mutex_unlock(&acpi_ioremap_lock);
484 WARN(true, PREFIX "%s: bad address %p\n", __func__, virt);
485 return;
486 }
487 acpi_os_drop_map_ref(map);
488 mutex_unlock(&acpi_ioremap_lock);
489
490 acpi_os_map_cleanup(map);
491 }
492 EXPORT_SYMBOL_GPL(acpi_os_unmap_iomem);
493
494 void __ref acpi_os_unmap_memory(void *virt, acpi_size size)
495 {
496 return acpi_os_unmap_iomem((void __iomem *)virt, size);
497 }
498 EXPORT_SYMBOL_GPL(acpi_os_unmap_memory);
499
500 void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size)
501 {
502 if (!acpi_gbl_permanent_mmap)
503 __acpi_unmap_table(virt, size);
504 }
505
506 int acpi_os_map_generic_address(struct acpi_generic_address *gas)
507 {
508 u64 addr;
509 void __iomem *virt;
510
511 if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
512 return 0;
513
514 /* Handle possible alignment issues */
515 memcpy(&addr, &gas->address, sizeof(addr));
516 if (!addr || !gas->bit_width)
517 return -EINVAL;
518
519 virt = acpi_os_map_iomem(addr, gas->bit_width / 8);
520 if (!virt)
521 return -EIO;
522
523 return 0;
524 }
525 EXPORT_SYMBOL(acpi_os_map_generic_address);
526
527 void acpi_os_unmap_generic_address(struct acpi_generic_address *gas)
528 {
529 u64 addr;
530 struct acpi_ioremap *map;
531
532 if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
533 return;
534
535 /* Handle possible alignment issues */
536 memcpy(&addr, &gas->address, sizeof(addr));
537 if (!addr || !gas->bit_width)
538 return;
539
540 mutex_lock(&acpi_ioremap_lock);
541 map = acpi_map_lookup(addr, gas->bit_width / 8);
542 if (!map) {
543 mutex_unlock(&acpi_ioremap_lock);
544 return;
545 }
546 acpi_os_drop_map_ref(map);
547 mutex_unlock(&acpi_ioremap_lock);
548
549 acpi_os_map_cleanup(map);
550 }
551 EXPORT_SYMBOL(acpi_os_unmap_generic_address);
552
553 #ifdef ACPI_FUTURE_USAGE
554 acpi_status
555 acpi_os_get_physical_address(void *virt, acpi_physical_address * phys)
556 {
557 if (!phys || !virt)
558 return AE_BAD_PARAMETER;
559
560 *phys = virt_to_phys(virt);
561
562 return AE_OK;
563 }
564 #endif
565
566 #ifdef CONFIG_ACPI_REV_OVERRIDE_POSSIBLE
567 static bool acpi_rev_override;
568
569 int __init acpi_rev_override_setup(char *str)
570 {
571 acpi_rev_override = true;
572 return 1;
573 }
574 __setup("acpi_rev_override", acpi_rev_override_setup);
575 #else
576 #define acpi_rev_override false
577 #endif
578
579 #define ACPI_MAX_OVERRIDE_LEN 100
580
581 static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN];
582
583 acpi_status
584 acpi_os_predefined_override(const struct acpi_predefined_names *init_val,
585 char **new_val)
586 {
587 if (!init_val || !new_val)
588 return AE_BAD_PARAMETER;
589
590 *new_val = NULL;
591 if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) {
592 printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n",
593 acpi_os_name);
594 *new_val = acpi_os_name;
595 }
596
597 if (!memcmp(init_val->name, "_REV", 4) && acpi_rev_override) {
598 printk(KERN_INFO PREFIX "Overriding _REV return value to 5\n");
599 *new_val = (char *)5;
600 }
601
602 return AE_OK;
603 }
604
605 static void acpi_table_taint(struct acpi_table_header *table)
606 {
607 pr_warn(PREFIX
608 "Override [%4.4s-%8.8s], this is unsafe: tainting kernel\n",
609 table->signature, table->oem_table_id);
610 add_taint(TAINT_OVERRIDDEN_ACPI_TABLE, LOCKDEP_NOW_UNRELIABLE);
611 }
612
613 #ifdef CONFIG_ACPI_INITRD_TABLE_OVERRIDE
614 #include <linux/earlycpio.h>
615 #include <linux/memblock.h>
616
617 static u64 acpi_tables_addr;
618 static int all_tables_size;
619
620 /* Copied from acpica/tbutils.c:acpi_tb_checksum() */
621 static u8 __init acpi_table_checksum(u8 *buffer, u32 length)
622 {
623 u8 sum = 0;
624 u8 *end = buffer + length;
625
626 while (buffer < end)
627 sum = (u8) (sum + *(buffer++));
628 return sum;
629 }
630
631 /* All but ACPI_SIG_RSDP and ACPI_SIG_FACS: */
632 static const char * const table_sigs[] = {
633 ACPI_SIG_BERT, ACPI_SIG_CPEP, ACPI_SIG_ECDT, ACPI_SIG_EINJ,
634 ACPI_SIG_ERST, ACPI_SIG_HEST, ACPI_SIG_MADT, ACPI_SIG_MSCT,
635 ACPI_SIG_SBST, ACPI_SIG_SLIT, ACPI_SIG_SRAT, ACPI_SIG_ASF,
636 ACPI_SIG_BOOT, ACPI_SIG_DBGP, ACPI_SIG_DMAR, ACPI_SIG_HPET,
637 ACPI_SIG_IBFT, ACPI_SIG_IVRS, ACPI_SIG_MCFG, ACPI_SIG_MCHI,
638 ACPI_SIG_SLIC, ACPI_SIG_SPCR, ACPI_SIG_SPMI, ACPI_SIG_TCPA,
639 ACPI_SIG_UEFI, ACPI_SIG_WAET, ACPI_SIG_WDAT, ACPI_SIG_WDDT,
640 ACPI_SIG_WDRT, ACPI_SIG_DSDT, ACPI_SIG_FADT, ACPI_SIG_PSDT,
641 ACPI_SIG_RSDT, ACPI_SIG_XSDT, ACPI_SIG_SSDT, NULL };
642
643 #define ACPI_HEADER_SIZE sizeof(struct acpi_table_header)
644
645 #define ACPI_OVERRIDE_TABLES 64
646 static struct cpio_data __initdata acpi_initrd_files[ACPI_OVERRIDE_TABLES];
647 static DECLARE_BITMAP(acpi_initrd_installed, ACPI_OVERRIDE_TABLES);
648
649 #define MAP_CHUNK_SIZE (NR_FIX_BTMAPS << PAGE_SHIFT)
650
651 void __init acpi_initrd_override(void *data, size_t size)
652 {
653 int sig, no, table_nr = 0, total_offset = 0;
654 long offset = 0;
655 struct acpi_table_header *table;
656 char cpio_path[32] = "kernel/firmware/acpi/";
657 struct cpio_data file;
658
659 if (data == NULL || size == 0)
660 return;
661
662 for (no = 0; no < ACPI_OVERRIDE_TABLES; no++) {
663 file = find_cpio_data(cpio_path, data, size, &offset);
664 if (!file.data)
665 break;
666
667 data += offset;
668 size -= offset;
669
670 if (file.size < sizeof(struct acpi_table_header)) {
671 pr_err("ACPI OVERRIDE: Table smaller than ACPI header [%s%s]\n",
672 cpio_path, file.name);
673 continue;
674 }
675
676 table = file.data;
677
678 for (sig = 0; table_sigs[sig]; sig++)
679 if (!memcmp(table->signature, table_sigs[sig], 4))
680 break;
681
682 if (!table_sigs[sig]) {
683 pr_err("ACPI OVERRIDE: Unknown signature [%s%s]\n",
684 cpio_path, file.name);
685 continue;
686 }
687 if (file.size != table->length) {
688 pr_err("ACPI OVERRIDE: File length does not match table length [%s%s]\n",
689 cpio_path, file.name);
690 continue;
691 }
692 if (acpi_table_checksum(file.data, table->length)) {
693 pr_err("ACPI OVERRIDE: Bad table checksum [%s%s]\n",
694 cpio_path, file.name);
695 continue;
696 }
697
698 pr_info("%4.4s ACPI table found in initrd [%s%s][0x%x]\n",
699 table->signature, cpio_path, file.name, table->length);
700
701 all_tables_size += table->length;
702 acpi_initrd_files[table_nr].data = file.data;
703 acpi_initrd_files[table_nr].size = file.size;
704 table_nr++;
705 }
706 if (table_nr == 0)
707 return;
708
709 acpi_tables_addr =
710 memblock_find_in_range(0, max_low_pfn_mapped << PAGE_SHIFT,
711 all_tables_size, PAGE_SIZE);
712 if (!acpi_tables_addr) {
713 WARN_ON(1);
714 return;
715 }
716 /*
717 * Only calling e820_add_reserve does not work and the
718 * tables are invalid (memory got used) later.
719 * memblock_reserve works as expected and the tables won't get modified.
720 * But it's not enough on X86 because ioremap will
721 * complain later (used by acpi_os_map_memory) that the pages
722 * that should get mapped are not marked "reserved".
723 * Both memblock_reserve and e820_add_region (via arch_reserve_mem_area)
724 * works fine.
725 */
726 memblock_reserve(acpi_tables_addr, all_tables_size);
727 arch_reserve_mem_area(acpi_tables_addr, all_tables_size);
728
729 /*
730 * early_ioremap only can remap 256k one time. If we map all
731 * tables one time, we will hit the limit. Need to map chunks
732 * one by one during copying the same as that in relocate_initrd().
733 */
734 for (no = 0; no < table_nr; no++) {
735 unsigned char *src_p = acpi_initrd_files[no].data;
736 phys_addr_t size = acpi_initrd_files[no].size;
737 phys_addr_t dest_addr = acpi_tables_addr + total_offset;
738 phys_addr_t slop, clen;
739 char *dest_p;
740
741 total_offset += size;
742
743 while (size) {
744 slop = dest_addr & ~PAGE_MASK;
745 clen = size;
746 if (clen > MAP_CHUNK_SIZE - slop)
747 clen = MAP_CHUNK_SIZE - slop;
748 dest_p = early_ioremap(dest_addr & PAGE_MASK,
749 clen + slop);
750 memcpy(dest_p + slop, src_p, clen);
751 early_iounmap(dest_p, clen + slop);
752 src_p += clen;
753 dest_addr += clen;
754 size -= clen;
755 }
756 }
757 }
758
759 acpi_status
760 acpi_os_physical_table_override(struct acpi_table_header *existing_table,
761 acpi_physical_address *address, u32 *length)
762 {
763 int table_offset = 0;
764 int table_index = 0;
765 struct acpi_table_header *table;
766 u32 table_length;
767
768 *length = 0;
769 *address = 0;
770 if (!acpi_tables_addr)
771 return AE_OK;
772
773 while (table_offset + ACPI_HEADER_SIZE <= all_tables_size) {
774 table = acpi_os_map_memory(acpi_tables_addr + table_offset,
775 ACPI_HEADER_SIZE);
776 if (table_offset + table->length > all_tables_size) {
777 acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
778 WARN_ON(1);
779 return AE_OK;
780 }
781
782 table_length = table->length;
783
784 /* Only override tables matched */
785 if (test_bit(table_index, acpi_initrd_installed) ||
786 memcmp(existing_table->signature, table->signature, 4) ||
787 memcmp(table->oem_table_id, existing_table->oem_table_id,
788 ACPI_OEM_TABLE_ID_SIZE)) {
789 acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
790 goto next_table;
791 }
792
793 *length = table_length;
794 *address = acpi_tables_addr + table_offset;
795 acpi_table_taint(existing_table);
796 acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
797 set_bit(table_index, acpi_initrd_installed);
798 break;
799
800 next_table:
801 table_offset += table_length;
802 table_index++;
803 }
804 return AE_OK;
805 }
806
807 void __init acpi_initrd_initialize_tables(void)
808 {
809 int table_offset = 0;
810 int table_index = 0;
811 u32 table_length;
812 struct acpi_table_header *table;
813
814 if (!acpi_tables_addr)
815 return;
816
817 while (table_offset + ACPI_HEADER_SIZE <= all_tables_size) {
818 table = acpi_os_map_memory(acpi_tables_addr + table_offset,
819 ACPI_HEADER_SIZE);
820 if (table_offset + table->length > all_tables_size) {
821 acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
822 WARN_ON(1);
823 return;
824 }
825
826 table_length = table->length;
827
828 /* Skip RSDT/XSDT which should only be used for override */
829 if (test_bit(table_index, acpi_initrd_installed) ||
830 ACPI_COMPARE_NAME(table->signature, ACPI_SIG_RSDT) ||
831 ACPI_COMPARE_NAME(table->signature, ACPI_SIG_XSDT)) {
832 acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
833 goto next_table;
834 }
835
836 acpi_table_taint(table);
837 acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
838 acpi_install_table(acpi_tables_addr + table_offset, TRUE);
839 set_bit(table_index, acpi_initrd_installed);
840 next_table:
841 table_offset += table_length;
842 table_index++;
843 }
844 }
845 #else
846 acpi_status
847 acpi_os_physical_table_override(struct acpi_table_header *existing_table,
848 acpi_physical_address *address,
849 u32 *table_length)
850 {
851 *table_length = 0;
852 *address = 0;
853 return AE_OK;
854 }
855
856 void __init acpi_initrd_initialize_tables(void)
857 {
858 }
859 #endif /* CONFIG_ACPI_INITRD_TABLE_OVERRIDE */
860
861 acpi_status
862 acpi_os_table_override(struct acpi_table_header *existing_table,
863 struct acpi_table_header **new_table)
864 {
865 if (!existing_table || !new_table)
866 return AE_BAD_PARAMETER;
867
868 *new_table = NULL;
869
870 #ifdef CONFIG_ACPI_CUSTOM_DSDT
871 if (strncmp(existing_table->signature, "DSDT", 4) == 0)
872 *new_table = (struct acpi_table_header *)AmlCode;
873 #endif
874 if (*new_table != NULL)
875 acpi_table_taint(existing_table);
876 return AE_OK;
877 }
878
879 static irqreturn_t acpi_irq(int irq, void *dev_id)
880 {
881 u32 handled;
882
883 handled = (*acpi_irq_handler) (acpi_irq_context);
884
885 if (handled) {
886 acpi_irq_handled++;
887 return IRQ_HANDLED;
888 } else {
889 acpi_irq_not_handled++;
890 return IRQ_NONE;
891 }
892 }
893
894 acpi_status
895 acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler,
896 void *context)
897 {
898 unsigned int irq;
899
900 acpi_irq_stats_init();
901
902 /*
903 * ACPI interrupts different from the SCI in our copy of the FADT are
904 * not supported.
905 */
906 if (gsi != acpi_gbl_FADT.sci_interrupt)
907 return AE_BAD_PARAMETER;
908
909 if (acpi_irq_handler)
910 return AE_ALREADY_ACQUIRED;
911
912 if (acpi_gsi_to_irq(gsi, &irq) < 0) {
913 printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n",
914 gsi);
915 return AE_OK;
916 }
917
918 acpi_irq_handler = handler;
919 acpi_irq_context = context;
920 if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) {
921 printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq);
922 acpi_irq_handler = NULL;
923 return AE_NOT_ACQUIRED;
924 }
925 acpi_sci_irq = irq;
926
927 return AE_OK;
928 }
929
930 acpi_status acpi_os_remove_interrupt_handler(u32 gsi, acpi_osd_handler handler)
931 {
932 if (gsi != acpi_gbl_FADT.sci_interrupt || !acpi_sci_irq_valid())
933 return AE_BAD_PARAMETER;
934
935 free_irq(acpi_sci_irq, acpi_irq);
936 acpi_irq_handler = NULL;
937 acpi_sci_irq = INVALID_ACPI_IRQ;
938
939 return AE_OK;
940 }
941
942 /*
943 * Running in interpreter thread context, safe to sleep
944 */
945
946 void acpi_os_sleep(u64 ms)
947 {
948 msleep(ms);
949 }
950
951 void acpi_os_stall(u32 us)
952 {
953 while (us) {
954 u32 delay = 1000;
955
956 if (delay > us)
957 delay = us;
958 udelay(delay);
959 touch_nmi_watchdog();
960 us -= delay;
961 }
962 }
963
964 /*
965 * Support ACPI 3.0 AML Timer operand
966 * Returns 64-bit free-running, monotonically increasing timer
967 * with 100ns granularity
968 */
969 u64 acpi_os_get_timer(void)
970 {
971 u64 time_ns = ktime_to_ns(ktime_get());
972 do_div(time_ns, 100);
973 return time_ns;
974 }
975
976 acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width)
977 {
978 u32 dummy;
979
980 if (!value)
981 value = &dummy;
982
983 *value = 0;
984 if (width <= 8) {
985 *(u8 *) value = inb(port);
986 } else if (width <= 16) {
987 *(u16 *) value = inw(port);
988 } else if (width <= 32) {
989 *(u32 *) value = inl(port);
990 } else {
991 BUG();
992 }
993
994 return AE_OK;
995 }
996
997 EXPORT_SYMBOL(acpi_os_read_port);
998
999 acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width)
1000 {
1001 if (width <= 8) {
1002 outb(value, port);
1003 } else if (width <= 16) {
1004 outw(value, port);
1005 } else if (width <= 32) {
1006 outl(value, port);
1007 } else {
1008 BUG();
1009 }
1010
1011 return AE_OK;
1012 }
1013
1014 EXPORT_SYMBOL(acpi_os_write_port);
1015
1016 acpi_status
1017 acpi_os_read_memory(acpi_physical_address phys_addr, u64 *value, u32 width)
1018 {
1019 void __iomem *virt_addr;
1020 unsigned int size = width / 8;
1021 bool unmap = false;
1022 u64 dummy;
1023
1024 rcu_read_lock();
1025 virt_addr = acpi_map_vaddr_lookup(phys_addr, size);
1026 if (!virt_addr) {
1027 rcu_read_unlock();
1028 virt_addr = acpi_os_ioremap(phys_addr, size);
1029 if (!virt_addr)
1030 return AE_BAD_ADDRESS;
1031 unmap = true;
1032 }
1033
1034 if (!value)
1035 value = &dummy;
1036
1037 switch (width) {
1038 case 8:
1039 *(u8 *) value = readb(virt_addr);
1040 break;
1041 case 16:
1042 *(u16 *) value = readw(virt_addr);
1043 break;
1044 case 32:
1045 *(u32 *) value = readl(virt_addr);
1046 break;
1047 case 64:
1048 *(u64 *) value = readq(virt_addr);
1049 break;
1050 default:
1051 BUG();
1052 }
1053
1054 if (unmap)
1055 iounmap(virt_addr);
1056 else
1057 rcu_read_unlock();
1058
1059 return AE_OK;
1060 }
1061
1062 acpi_status
1063 acpi_os_write_memory(acpi_physical_address phys_addr, u64 value, u32 width)
1064 {
1065 void __iomem *virt_addr;
1066 unsigned int size = width / 8;
1067 bool unmap = false;
1068
1069 rcu_read_lock();
1070 virt_addr = acpi_map_vaddr_lookup(phys_addr, size);
1071 if (!virt_addr) {
1072 rcu_read_unlock();
1073 virt_addr = acpi_os_ioremap(phys_addr, size);
1074 if (!virt_addr)
1075 return AE_BAD_ADDRESS;
1076 unmap = true;
1077 }
1078
1079 switch (width) {
1080 case 8:
1081 writeb(value, virt_addr);
1082 break;
1083 case 16:
1084 writew(value, virt_addr);
1085 break;
1086 case 32:
1087 writel(value, virt_addr);
1088 break;
1089 case 64:
1090 writeq(value, virt_addr);
1091 break;
1092 default:
1093 BUG();
1094 }
1095
1096 if (unmap)
1097 iounmap(virt_addr);
1098 else
1099 rcu_read_unlock();
1100
1101 return AE_OK;
1102 }
1103
1104 acpi_status
1105 acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
1106 u64 *value, u32 width)
1107 {
1108 int result, size;
1109 u32 value32;
1110
1111 if (!value)
1112 return AE_BAD_PARAMETER;
1113
1114 switch (width) {
1115 case 8:
1116 size = 1;
1117 break;
1118 case 16:
1119 size = 2;
1120 break;
1121 case 32:
1122 size = 4;
1123 break;
1124 default:
1125 return AE_ERROR;
1126 }
1127
1128 result = raw_pci_read(pci_id->segment, pci_id->bus,
1129 PCI_DEVFN(pci_id->device, pci_id->function),
1130 reg, size, &value32);
1131 *value = value32;
1132
1133 return (result ? AE_ERROR : AE_OK);
1134 }
1135
1136 acpi_status
1137 acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
1138 u64 value, u32 width)
1139 {
1140 int result, size;
1141
1142 switch (width) {
1143 case 8:
1144 size = 1;
1145 break;
1146 case 16:
1147 size = 2;
1148 break;
1149 case 32:
1150 size = 4;
1151 break;
1152 default:
1153 return AE_ERROR;
1154 }
1155
1156 result = raw_pci_write(pci_id->segment, pci_id->bus,
1157 PCI_DEVFN(pci_id->device, pci_id->function),
1158 reg, size, value);
1159
1160 return (result ? AE_ERROR : AE_OK);
1161 }
1162
1163 static void acpi_os_execute_deferred(struct work_struct *work)
1164 {
1165 struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work);
1166
1167 dpc->function(dpc->context);
1168 kfree(dpc);
1169 }
1170
1171 #ifdef CONFIG_ACPI_DEBUGGER
1172 static struct acpi_debugger acpi_debugger;
1173 static bool acpi_debugger_initialized;
1174
1175 int acpi_register_debugger(struct module *owner,
1176 const struct acpi_debugger_ops *ops)
1177 {
1178 int ret = 0;
1179
1180 mutex_lock(&acpi_debugger.lock);
1181 if (acpi_debugger.ops) {
1182 ret = -EBUSY;
1183 goto err_lock;
1184 }
1185
1186 acpi_debugger.owner = owner;
1187 acpi_debugger.ops = ops;
1188
1189 err_lock:
1190 mutex_unlock(&acpi_debugger.lock);
1191 return ret;
1192 }
1193 EXPORT_SYMBOL(acpi_register_debugger);
1194
1195 void acpi_unregister_debugger(const struct acpi_debugger_ops *ops)
1196 {
1197 mutex_lock(&acpi_debugger.lock);
1198 if (ops == acpi_debugger.ops) {
1199 acpi_debugger.ops = NULL;
1200 acpi_debugger.owner = NULL;
1201 }
1202 mutex_unlock(&acpi_debugger.lock);
1203 }
1204 EXPORT_SYMBOL(acpi_unregister_debugger);
1205
1206 int acpi_debugger_create_thread(acpi_osd_exec_callback function, void *context)
1207 {
1208 int ret;
1209 int (*func)(acpi_osd_exec_callback, void *);
1210 struct module *owner;
1211
1212 if (!acpi_debugger_initialized)
1213 return -ENODEV;
1214 mutex_lock(&acpi_debugger.lock);
1215 if (!acpi_debugger.ops) {
1216 ret = -ENODEV;
1217 goto err_lock;
1218 }
1219 if (!try_module_get(acpi_debugger.owner)) {
1220 ret = -ENODEV;
1221 goto err_lock;
1222 }
1223 func = acpi_debugger.ops->create_thread;
1224 owner = acpi_debugger.owner;
1225 mutex_unlock(&acpi_debugger.lock);
1226
1227 ret = func(function, context);
1228
1229 mutex_lock(&acpi_debugger.lock);
1230 module_put(owner);
1231 err_lock:
1232 mutex_unlock(&acpi_debugger.lock);
1233 return ret;
1234 }
1235
1236 ssize_t acpi_debugger_write_log(const char *msg)
1237 {
1238 ssize_t ret;
1239 ssize_t (*func)(const char *);
1240 struct module *owner;
1241
1242 if (!acpi_debugger_initialized)
1243 return -ENODEV;
1244 mutex_lock(&acpi_debugger.lock);
1245 if (!acpi_debugger.ops) {
1246 ret = -ENODEV;
1247 goto err_lock;
1248 }
1249 if (!try_module_get(acpi_debugger.owner)) {
1250 ret = -ENODEV;
1251 goto err_lock;
1252 }
1253 func = acpi_debugger.ops->write_log;
1254 owner = acpi_debugger.owner;
1255 mutex_unlock(&acpi_debugger.lock);
1256
1257 ret = func(msg);
1258
1259 mutex_lock(&acpi_debugger.lock);
1260 module_put(owner);
1261 err_lock:
1262 mutex_unlock(&acpi_debugger.lock);
1263 return ret;
1264 }
1265
1266 ssize_t acpi_debugger_read_cmd(char *buffer, size_t buffer_length)
1267 {
1268 ssize_t ret;
1269 ssize_t (*func)(char *, size_t);
1270 struct module *owner;
1271
1272 if (!acpi_debugger_initialized)
1273 return -ENODEV;
1274 mutex_lock(&acpi_debugger.lock);
1275 if (!acpi_debugger.ops) {
1276 ret = -ENODEV;
1277 goto err_lock;
1278 }
1279 if (!try_module_get(acpi_debugger.owner)) {
1280 ret = -ENODEV;
1281 goto err_lock;
1282 }
1283 func = acpi_debugger.ops->read_cmd;
1284 owner = acpi_debugger.owner;
1285 mutex_unlock(&acpi_debugger.lock);
1286
1287 ret = func(buffer, buffer_length);
1288
1289 mutex_lock(&acpi_debugger.lock);
1290 module_put(owner);
1291 err_lock:
1292 mutex_unlock(&acpi_debugger.lock);
1293 return ret;
1294 }
1295
1296 int acpi_debugger_wait_command_ready(void)
1297 {
1298 int ret;
1299 int (*func)(bool, char *, size_t);
1300 struct module *owner;
1301
1302 if (!acpi_debugger_initialized)
1303 return -ENODEV;
1304 mutex_lock(&acpi_debugger.lock);
1305 if (!acpi_debugger.ops) {
1306 ret = -ENODEV;
1307 goto err_lock;
1308 }
1309 if (!try_module_get(acpi_debugger.owner)) {
1310 ret = -ENODEV;
1311 goto err_lock;
1312 }
1313 func = acpi_debugger.ops->wait_command_ready;
1314 owner = acpi_debugger.owner;
1315 mutex_unlock(&acpi_debugger.lock);
1316
1317 ret = func(acpi_gbl_method_executing,
1318 acpi_gbl_db_line_buf, ACPI_DB_LINE_BUFFER_SIZE);
1319
1320 mutex_lock(&acpi_debugger.lock);
1321 module_put(owner);
1322 err_lock:
1323 mutex_unlock(&acpi_debugger.lock);
1324 return ret;
1325 }
1326
1327 int acpi_debugger_notify_command_complete(void)
1328 {
1329 int ret;
1330 int (*func)(void);
1331 struct module *owner;
1332
1333 if (!acpi_debugger_initialized)
1334 return -ENODEV;
1335 mutex_lock(&acpi_debugger.lock);
1336 if (!acpi_debugger.ops) {
1337 ret = -ENODEV;
1338 goto err_lock;
1339 }
1340 if (!try_module_get(acpi_debugger.owner)) {
1341 ret = -ENODEV;
1342 goto err_lock;
1343 }
1344 func = acpi_debugger.ops->notify_command_complete;
1345 owner = acpi_debugger.owner;
1346 mutex_unlock(&acpi_debugger.lock);
1347
1348 ret = func();
1349
1350 mutex_lock(&acpi_debugger.lock);
1351 module_put(owner);
1352 err_lock:
1353 mutex_unlock(&acpi_debugger.lock);
1354 return ret;
1355 }
1356
1357 int __init acpi_debugger_init(void)
1358 {
1359 mutex_init(&acpi_debugger.lock);
1360 acpi_debugger_initialized = true;
1361 return 0;
1362 }
1363 #endif
1364
1365 /*******************************************************************************
1366 *
1367 * FUNCTION: acpi_os_execute
1368 *
1369 * PARAMETERS: Type - Type of the callback
1370 * Function - Function to be executed
1371 * Context - Function parameters
1372 *
1373 * RETURN: Status
1374 *
1375 * DESCRIPTION: Depending on type, either queues function for deferred execution or
1376 * immediately executes function on a separate thread.
1377 *
1378 ******************************************************************************/
1379
1380 acpi_status acpi_os_execute(acpi_execute_type type,
1381 acpi_osd_exec_callback function, void *context)
1382 {
1383 acpi_status status = AE_OK;
1384 struct acpi_os_dpc *dpc;
1385 struct workqueue_struct *queue;
1386 int ret;
1387 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
1388 "Scheduling function [%p(%p)] for deferred execution.\n",
1389 function, context));
1390
1391 if (type == OSL_DEBUGGER_MAIN_THREAD) {
1392 ret = acpi_debugger_create_thread(function, context);
1393 if (ret) {
1394 pr_err("Call to kthread_create() failed.\n");
1395 status = AE_ERROR;
1396 }
1397 goto out_thread;
1398 }
1399
1400 /*
1401 * Allocate/initialize DPC structure. Note that this memory will be
1402 * freed by the callee. The kernel handles the work_struct list in a
1403 * way that allows us to also free its memory inside the callee.
1404 * Because we may want to schedule several tasks with different
1405 * parameters we can't use the approach some kernel code uses of
1406 * having a static work_struct.
1407 */
1408
1409 dpc = kzalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC);
1410 if (!dpc)
1411 return AE_NO_MEMORY;
1412
1413 dpc->function = function;
1414 dpc->context = context;
1415
1416 /*
1417 * To prevent lockdep from complaining unnecessarily, make sure that
1418 * there is a different static lockdep key for each workqueue by using
1419 * INIT_WORK() for each of them separately.
1420 */
1421 if (type == OSL_NOTIFY_HANDLER) {
1422 queue = kacpi_notify_wq;
1423 INIT_WORK(&dpc->work, acpi_os_execute_deferred);
1424 } else if (type == OSL_GPE_HANDLER) {
1425 queue = kacpid_wq;
1426 INIT_WORK(&dpc->work, acpi_os_execute_deferred);
1427 } else {
1428 pr_err("Unsupported os_execute type %d.\n", type);
1429 status = AE_ERROR;
1430 }
1431
1432 if (ACPI_FAILURE(status))
1433 goto err_workqueue;
1434
1435 /*
1436 * On some machines, a software-initiated SMI causes corruption unless
1437 * the SMI runs on CPU 0. An SMI can be initiated by any AML, but
1438 * typically it's done in GPE-related methods that are run via
1439 * workqueues, so we can avoid the known corruption cases by always
1440 * queueing on CPU 0.
1441 */
1442 ret = queue_work_on(0, queue, &dpc->work);
1443 if (!ret) {
1444 printk(KERN_ERR PREFIX
1445 "Call to queue_work() failed.\n");
1446 status = AE_ERROR;
1447 }
1448 err_workqueue:
1449 if (ACPI_FAILURE(status))
1450 kfree(dpc);
1451 out_thread:
1452 return status;
1453 }
1454 EXPORT_SYMBOL(acpi_os_execute);
1455
1456 void acpi_os_wait_events_complete(void)
1457 {
1458 /*
1459 * Make sure the GPE handler or the fixed event handler is not used
1460 * on another CPU after removal.
1461 */
1462 if (acpi_sci_irq_valid())
1463 synchronize_hardirq(acpi_sci_irq);
1464 flush_workqueue(kacpid_wq);
1465 flush_workqueue(kacpi_notify_wq);
1466 }
1467
1468 struct acpi_hp_work {
1469 struct work_struct work;
1470 struct acpi_device *adev;
1471 u32 src;
1472 };
1473
1474 static void acpi_hotplug_work_fn(struct work_struct *work)
1475 {
1476 struct acpi_hp_work *hpw = container_of(work, struct acpi_hp_work, work);
1477
1478 acpi_os_wait_events_complete();
1479 acpi_device_hotplug(hpw->adev, hpw->src);
1480 kfree(hpw);
1481 }
1482
1483 acpi_status acpi_hotplug_schedule(struct acpi_device *adev, u32 src)
1484 {
1485 struct acpi_hp_work *hpw;
1486
1487 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
1488 "Scheduling hotplug event (%p, %u) for deferred execution.\n",
1489 adev, src));
1490
1491 hpw = kmalloc(sizeof(*hpw), GFP_KERNEL);
1492 if (!hpw)
1493 return AE_NO_MEMORY;
1494
1495 INIT_WORK(&hpw->work, acpi_hotplug_work_fn);
1496 hpw->adev = adev;
1497 hpw->src = src;
1498 /*
1499 * We can't run hotplug code in kacpid_wq/kacpid_notify_wq etc., because
1500 * the hotplug code may call driver .remove() functions, which may
1501 * invoke flush_scheduled_work()/acpi_os_wait_events_complete() to flush
1502 * these workqueues.
1503 */
1504 if (!queue_work(kacpi_hotplug_wq, &hpw->work)) {
1505 kfree(hpw);
1506 return AE_ERROR;
1507 }
1508 return AE_OK;
1509 }
1510
1511 bool acpi_queue_hotplug_work(struct work_struct *work)
1512 {
1513 return queue_work(kacpi_hotplug_wq, work);
1514 }
1515
1516 acpi_status
1517 acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle)
1518 {
1519 struct semaphore *sem = NULL;
1520
1521 sem = acpi_os_allocate_zeroed(sizeof(struct semaphore));
1522 if (!sem)
1523 return AE_NO_MEMORY;
1524
1525 sema_init(sem, initial_units);
1526
1527 *handle = (acpi_handle *) sem;
1528
1529 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n",
1530 *handle, initial_units));
1531
1532 return AE_OK;
1533 }
1534
1535 /*
1536 * TODO: A better way to delete semaphores? Linux doesn't have a
1537 * 'delete_semaphore()' function -- may result in an invalid
1538 * pointer dereference for non-synchronized consumers. Should
1539 * we at least check for blocked threads and signal/cancel them?
1540 */
1541
1542 acpi_status acpi_os_delete_semaphore(acpi_handle handle)
1543 {
1544 struct semaphore *sem = (struct semaphore *)handle;
1545
1546 if (!sem)
1547 return AE_BAD_PARAMETER;
1548
1549 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle));
1550
1551 BUG_ON(!list_empty(&sem->wait_list));
1552 kfree(sem);
1553 sem = NULL;
1554
1555 return AE_OK;
1556 }
1557
1558 /*
1559 * TODO: Support for units > 1?
1560 */
1561 acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout)
1562 {
1563 acpi_status status = AE_OK;
1564 struct semaphore *sem = (struct semaphore *)handle;
1565 long jiffies;
1566 int ret = 0;
1567
1568 if (!acpi_os_initialized)
1569 return AE_OK;
1570
1571 if (!sem || (units < 1))
1572 return AE_BAD_PARAMETER;
1573
1574 if (units > 1)
1575 return AE_SUPPORT;
1576
1577 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n",
1578 handle, units, timeout));
1579
1580 if (timeout == ACPI_WAIT_FOREVER)
1581 jiffies = MAX_SCHEDULE_TIMEOUT;
1582 else
1583 jiffies = msecs_to_jiffies(timeout);
1584
1585 ret = down_timeout(sem, jiffies);
1586 if (ret)
1587 status = AE_TIME;
1588
1589 if (ACPI_FAILURE(status)) {
1590 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
1591 "Failed to acquire semaphore[%p|%d|%d], %s",
1592 handle, units, timeout,
1593 acpi_format_exception(status)));
1594 } else {
1595 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
1596 "Acquired semaphore[%p|%d|%d]", handle,
1597 units, timeout));
1598 }
1599
1600 return status;
1601 }
1602
1603 /*
1604 * TODO: Support for units > 1?
1605 */
1606 acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units)
1607 {
1608 struct semaphore *sem = (struct semaphore *)handle;
1609
1610 if (!acpi_os_initialized)
1611 return AE_OK;
1612
1613 if (!sem || (units < 1))
1614 return AE_BAD_PARAMETER;
1615
1616 if (units > 1)
1617 return AE_SUPPORT;
1618
1619 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle,
1620 units));
1621
1622 up(sem);
1623
1624 return AE_OK;
1625 }
1626
1627 acpi_status acpi_os_get_line(char *buffer, u32 buffer_length, u32 *bytes_read)
1628 {
1629 #ifdef ENABLE_DEBUGGER
1630 if (acpi_in_debugger) {
1631 u32 chars;
1632
1633 kdb_read(buffer, buffer_length);
1634
1635 /* remove the CR kdb includes */
1636 chars = strlen(buffer) - 1;
1637 buffer[chars] = '\0';
1638 }
1639 #else
1640 int ret;
1641
1642 ret = acpi_debugger_read_cmd(buffer, buffer_length);
1643 if (ret < 0)
1644 return AE_ERROR;
1645 if (bytes_read)
1646 *bytes_read = ret;
1647 #endif
1648
1649 return AE_OK;
1650 }
1651 EXPORT_SYMBOL(acpi_os_get_line);
1652
1653 acpi_status acpi_os_wait_command_ready(void)
1654 {
1655 int ret;
1656
1657 ret = acpi_debugger_wait_command_ready();
1658 if (ret < 0)
1659 return AE_ERROR;
1660 return AE_OK;
1661 }
1662
1663 acpi_status acpi_os_notify_command_complete(void)
1664 {
1665 int ret;
1666
1667 ret = acpi_debugger_notify_command_complete();
1668 if (ret < 0)
1669 return AE_ERROR;
1670 return AE_OK;
1671 }
1672
1673 acpi_status acpi_os_signal(u32 function, void *info)
1674 {
1675 switch (function) {
1676 case ACPI_SIGNAL_FATAL:
1677 printk(KERN_ERR PREFIX "Fatal opcode executed\n");
1678 break;
1679 case ACPI_SIGNAL_BREAKPOINT:
1680 /*
1681 * AML Breakpoint
1682 * ACPI spec. says to treat it as a NOP unless
1683 * you are debugging. So if/when we integrate
1684 * AML debugger into the kernel debugger its
1685 * hook will go here. But until then it is
1686 * not useful to print anything on breakpoints.
1687 */
1688 break;
1689 default:
1690 break;
1691 }
1692
1693 return AE_OK;
1694 }
1695
1696 static int __init acpi_os_name_setup(char *str)
1697 {
1698 char *p = acpi_os_name;
1699 int count = ACPI_MAX_OVERRIDE_LEN - 1;
1700
1701 if (!str || !*str)
1702 return 0;
1703
1704 for (; count-- && *str; str++) {
1705 if (isalnum(*str) || *str == ' ' || *str == ':')
1706 *p++ = *str;
1707 else if (*str == '\'' || *str == '"')
1708 continue;
1709 else
1710 break;
1711 }
1712 *p = 0;
1713
1714 return 1;
1715
1716 }
1717
1718 __setup("acpi_os_name=", acpi_os_name_setup);
1719
1720 #define OSI_STRING_LENGTH_MAX 64 /* arbitrary */
1721 #define OSI_STRING_ENTRIES_MAX 16 /* arbitrary */
1722
1723 struct osi_setup_entry {
1724 char string[OSI_STRING_LENGTH_MAX];
1725 bool enable;
1726 };
1727
1728 static struct osi_setup_entry
1729 osi_setup_entries[OSI_STRING_ENTRIES_MAX] __initdata = {
1730 {"Module Device", true},
1731 {"Processor Device", true},
1732 {"3.0 _SCP Extensions", true},
1733 {"Processor Aggregator Device", true},
1734 };
1735
1736 void __init acpi_osi_setup(char *str)
1737 {
1738 struct osi_setup_entry *osi;
1739 bool enable = true;
1740 int i;
1741
1742 if (!acpi_gbl_create_osi_method)
1743 return;
1744
1745 if (str == NULL || *str == '\0') {
1746 printk(KERN_INFO PREFIX "_OSI method disabled\n");
1747 acpi_gbl_create_osi_method = FALSE;
1748 return;
1749 }
1750
1751 if (*str == '!') {
1752 str++;
1753 if (*str == '\0') {
1754 osi_linux.default_disabling = 1;
1755 return;
1756 } else if (*str == '*') {
1757 acpi_update_interfaces(ACPI_DISABLE_ALL_STRINGS);
1758 for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
1759 osi = &osi_setup_entries[i];
1760 osi->enable = false;
1761 }
1762 return;
1763 }
1764 enable = false;
1765 }
1766
1767 for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
1768 osi = &osi_setup_entries[i];
1769 if (!strcmp(osi->string, str)) {
1770 osi->enable = enable;
1771 break;
1772 } else if (osi->string[0] == '\0') {
1773 osi->enable = enable;
1774 strncpy(osi->string, str, OSI_STRING_LENGTH_MAX);
1775 break;
1776 }
1777 }
1778 }
1779
1780 static void __init set_osi_linux(unsigned int enable)
1781 {
1782 if (osi_linux.enable != enable)
1783 osi_linux.enable = enable;
1784
1785 if (osi_linux.enable)
1786 acpi_osi_setup("Linux");
1787 else
1788 acpi_osi_setup("!Linux");
1789
1790 return;
1791 }
1792
1793 static void __init acpi_cmdline_osi_linux(unsigned int enable)
1794 {
1795 osi_linux.cmdline = 1; /* cmdline set the default and override DMI */
1796 osi_linux.dmi = 0;
1797 set_osi_linux(enable);
1798
1799 return;
1800 }
1801
1802 void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d)
1803 {
1804 printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident);
1805
1806 if (enable == -1)
1807 return;
1808
1809 osi_linux.dmi = 1; /* DMI knows that this box asks OSI(Linux) */
1810 set_osi_linux(enable);
1811
1812 return;
1813 }
1814
1815 /*
1816 * Modify the list of "OS Interfaces" reported to BIOS via _OSI
1817 *
1818 * empty string disables _OSI
1819 * string starting with '!' disables that string
1820 * otherwise string is added to list, augmenting built-in strings
1821 */
1822 static void __init acpi_osi_setup_late(void)
1823 {
1824 struct osi_setup_entry *osi;
1825 char *str;
1826 int i;
1827 acpi_status status;
1828
1829 if (osi_linux.default_disabling) {
1830 status = acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS);
1831
1832 if (ACPI_SUCCESS(status))
1833 printk(KERN_INFO PREFIX "Disabled all _OSI OS vendors\n");
1834 }
1835
1836 for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
1837 osi = &osi_setup_entries[i];
1838 str = osi->string;
1839
1840 if (*str == '\0')
1841 break;
1842 if (osi->enable) {
1843 status = acpi_install_interface(str);
1844
1845 if (ACPI_SUCCESS(status))
1846 printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str);
1847 } else {
1848 status = acpi_remove_interface(str);
1849
1850 if (ACPI_SUCCESS(status))
1851 printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str);
1852 }
1853 }
1854 }
1855
1856 static int __init osi_setup(char *str)
1857 {
1858 if (str && !strcmp("Linux", str))
1859 acpi_cmdline_osi_linux(1);
1860 else if (str && !strcmp("!Linux", str))
1861 acpi_cmdline_osi_linux(0);
1862 else
1863 acpi_osi_setup(str);
1864
1865 return 1;
1866 }
1867
1868 __setup("acpi_osi=", osi_setup);
1869
1870 /*
1871 * Disable the auto-serialization of named objects creation methods.
1872 *
1873 * This feature is enabled by default. It marks the AML control methods
1874 * that contain the opcodes to create named objects as "Serialized".
1875 */
1876 static int __init acpi_no_auto_serialize_setup(char *str)
1877 {
1878 acpi_gbl_auto_serialize_methods = FALSE;
1879 pr_info("ACPI: auto-serialization disabled\n");
1880
1881 return 1;
1882 }
1883
1884 __setup("acpi_no_auto_serialize", acpi_no_auto_serialize_setup);
1885
1886 /* Check of resource interference between native drivers and ACPI
1887 * OperationRegions (SystemIO and System Memory only).
1888 * IO ports and memory declared in ACPI might be used by the ACPI subsystem
1889 * in arbitrary AML code and can interfere with legacy drivers.
1890 * acpi_enforce_resources= can be set to:
1891 *
1892 * - strict (default) (2)
1893 * -> further driver trying to access the resources will not load
1894 * - lax (1)
1895 * -> further driver trying to access the resources will load, but you
1896 * get a system message that something might go wrong...
1897 *
1898 * - no (0)
1899 * -> ACPI Operation Region resources will not be registered
1900 *
1901 */
1902 #define ENFORCE_RESOURCES_STRICT 2
1903 #define ENFORCE_RESOURCES_LAX 1
1904 #define ENFORCE_RESOURCES_NO 0
1905
1906 static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT;
1907
1908 static int __init acpi_enforce_resources_setup(char *str)
1909 {
1910 if (str == NULL || *str == '\0')
1911 return 0;
1912
1913 if (!strcmp("strict", str))
1914 acpi_enforce_resources = ENFORCE_RESOURCES_STRICT;
1915 else if (!strcmp("lax", str))
1916 acpi_enforce_resources = ENFORCE_RESOURCES_LAX;
1917 else if (!strcmp("no", str))
1918 acpi_enforce_resources = ENFORCE_RESOURCES_NO;
1919
1920 return 1;
1921 }
1922
1923 __setup("acpi_enforce_resources=", acpi_enforce_resources_setup);
1924
1925 /* Check for resource conflicts between ACPI OperationRegions and native
1926 * drivers */
1927 int acpi_check_resource_conflict(const struct resource *res)
1928 {
1929 acpi_adr_space_type space_id;
1930 acpi_size length;
1931 u8 warn = 0;
1932 int clash = 0;
1933
1934 if (acpi_enforce_resources == ENFORCE_RESOURCES_NO)
1935 return 0;
1936 if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM))
1937 return 0;
1938
1939 if (res->flags & IORESOURCE_IO)
1940 space_id = ACPI_ADR_SPACE_SYSTEM_IO;
1941 else
1942 space_id = ACPI_ADR_SPACE_SYSTEM_MEMORY;
1943
1944 length = resource_size(res);
1945 if (acpi_enforce_resources != ENFORCE_RESOURCES_NO)
1946 warn = 1;
1947 clash = acpi_check_address_range(space_id, res->start, length, warn);
1948
1949 if (clash) {
1950 if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) {
1951 if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX)
1952 printk(KERN_NOTICE "ACPI: This conflict may"
1953 " cause random problems and system"
1954 " instability\n");
1955 printk(KERN_INFO "ACPI: If an ACPI driver is available"
1956 " for this device, you should use it instead of"
1957 " the native driver\n");
1958 }
1959 if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT)
1960 return -EBUSY;
1961 }
1962 return 0;
1963 }
1964 EXPORT_SYMBOL(acpi_check_resource_conflict);
1965
1966 int acpi_check_region(resource_size_t start, resource_size_t n,
1967 const char *name)
1968 {
1969 struct resource res = {
1970 .start = start,
1971 .end = start + n - 1,
1972 .name = name,
1973 .flags = IORESOURCE_IO,
1974 };
1975
1976 return acpi_check_resource_conflict(&res);
1977 }
1978 EXPORT_SYMBOL(acpi_check_region);
1979
1980 /*
1981 * Let drivers know whether the resource checks are effective
1982 */
1983 int acpi_resources_are_enforced(void)
1984 {
1985 return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT;
1986 }
1987 EXPORT_SYMBOL(acpi_resources_are_enforced);
1988
1989 bool acpi_osi_is_win8(void)
1990 {
1991 return acpi_gbl_osi_data >= ACPI_OSI_WIN_8;
1992 }
1993 EXPORT_SYMBOL(acpi_osi_is_win8);
1994
1995 /*
1996 * Deallocate the memory for a spinlock.
1997 */
1998 void acpi_os_delete_lock(acpi_spinlock handle)
1999 {
2000 ACPI_FREE(handle);
2001 }
2002
2003 /*
2004 * Acquire a spinlock.
2005 *
2006 * handle is a pointer to the spinlock_t.
2007 */
2008
2009 acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp)
2010 {
2011 acpi_cpu_flags flags;
2012 spin_lock_irqsave(lockp, flags);
2013 return flags;
2014 }
2015
2016 /*
2017 * Release a spinlock. See above.
2018 */
2019
2020 void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags)
2021 {
2022 spin_unlock_irqrestore(lockp, flags);
2023 }
2024
2025 #ifndef ACPI_USE_LOCAL_CACHE
2026
2027 /*******************************************************************************
2028 *
2029 * FUNCTION: acpi_os_create_cache
2030 *
2031 * PARAMETERS: name - Ascii name for the cache
2032 * size - Size of each cached object
2033 * depth - Maximum depth of the cache (in objects) <ignored>
2034 * cache - Where the new cache object is returned
2035 *
2036 * RETURN: status
2037 *
2038 * DESCRIPTION: Create a cache object
2039 *
2040 ******************************************************************************/
2041
2042 acpi_status
2043 acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache)
2044 {
2045 *cache = kmem_cache_create(name, size, 0, 0, NULL);
2046 if (*cache == NULL)
2047 return AE_ERROR;
2048 else
2049 return AE_OK;
2050 }
2051
2052 /*******************************************************************************
2053 *
2054 * FUNCTION: acpi_os_purge_cache
2055 *
2056 * PARAMETERS: Cache - Handle to cache object
2057 *
2058 * RETURN: Status
2059 *
2060 * DESCRIPTION: Free all objects within the requested cache.
2061 *
2062 ******************************************************************************/
2063
2064 acpi_status acpi_os_purge_cache(acpi_cache_t * cache)
2065 {
2066 kmem_cache_shrink(cache);
2067 return (AE_OK);
2068 }
2069
2070 /*******************************************************************************
2071 *
2072 * FUNCTION: acpi_os_delete_cache
2073 *
2074 * PARAMETERS: Cache - Handle to cache object
2075 *
2076 * RETURN: Status
2077 *
2078 * DESCRIPTION: Free all objects within the requested cache and delete the
2079 * cache object.
2080 *
2081 ******************************************************************************/
2082
2083 acpi_status acpi_os_delete_cache(acpi_cache_t * cache)
2084 {
2085 kmem_cache_destroy(cache);
2086 return (AE_OK);
2087 }
2088
2089 /*******************************************************************************
2090 *
2091 * FUNCTION: acpi_os_release_object
2092 *
2093 * PARAMETERS: Cache - Handle to cache object
2094 * Object - The object to be released
2095 *
2096 * RETURN: None
2097 *
2098 * DESCRIPTION: Release an object to the specified cache. If cache is full,
2099 * the object is deleted.
2100 *
2101 ******************************************************************************/
2102
2103 acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object)
2104 {
2105 kmem_cache_free(cache, object);
2106 return (AE_OK);
2107 }
2108 #endif
2109
2110 static int __init acpi_no_static_ssdt_setup(char *s)
2111 {
2112 acpi_gbl_disable_ssdt_table_install = TRUE;
2113 pr_info("ACPI: static SSDT installation disabled\n");
2114
2115 return 0;
2116 }
2117
2118 early_param("acpi_no_static_ssdt", acpi_no_static_ssdt_setup);
2119
2120 static int __init acpi_disable_return_repair(char *s)
2121 {
2122 printk(KERN_NOTICE PREFIX
2123 "ACPI: Predefined validation mechanism disabled\n");
2124 acpi_gbl_disable_auto_repair = TRUE;
2125
2126 return 1;
2127 }
2128
2129 __setup("acpica_no_return_repair", acpi_disable_return_repair);
2130
2131 acpi_status __init acpi_os_initialize(void)
2132 {
2133 acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block);
2134 acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block);
2135 acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block);
2136 acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block);
2137 if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) {
2138 /*
2139 * Use acpi_os_map_generic_address to pre-map the reset
2140 * register if it's in system memory.
2141 */
2142 int rv;
2143
2144 rv = acpi_os_map_generic_address(&acpi_gbl_FADT.reset_register);
2145 pr_debug(PREFIX "%s: map reset_reg status %d\n", __func__, rv);
2146 }
2147 acpi_os_initialized = true;
2148
2149 return AE_OK;
2150 }
2151
2152 acpi_status __init acpi_os_initialize1(void)
2153 {
2154 kacpid_wq = alloc_workqueue("kacpid", 0, 1);
2155 kacpi_notify_wq = alloc_workqueue("kacpi_notify", 0, 1);
2156 kacpi_hotplug_wq = alloc_ordered_workqueue("kacpi_hotplug", 0);
2157 BUG_ON(!kacpid_wq);
2158 BUG_ON(!kacpi_notify_wq);
2159 BUG_ON(!kacpi_hotplug_wq);
2160 acpi_install_interface_handler(acpi_osi_handler);
2161 acpi_osi_setup_late();
2162 return AE_OK;
2163 }
2164
2165 acpi_status acpi_os_terminate(void)
2166 {
2167 if (acpi_irq_handler) {
2168 acpi_os_remove_interrupt_handler(acpi_gbl_FADT.sci_interrupt,
2169 acpi_irq_handler);
2170 }
2171
2172 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe1_block);
2173 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block);
2174 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block);
2175 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block);
2176 if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER)
2177 acpi_os_unmap_generic_address(&acpi_gbl_FADT.reset_register);
2178
2179 destroy_workqueue(kacpid_wq);
2180 destroy_workqueue(kacpi_notify_wq);
2181 destroy_workqueue(kacpi_hotplug_wq);
2182
2183 return AE_OK;
2184 }
2185
2186 acpi_status acpi_os_prepare_sleep(u8 sleep_state, u32 pm1a_control,
2187 u32 pm1b_control)
2188 {
2189 int rc = 0;
2190 if (__acpi_os_prepare_sleep)
2191 rc = __acpi_os_prepare_sleep(sleep_state,
2192 pm1a_control, pm1b_control);
2193 if (rc < 0)
2194 return AE_ERROR;
2195 else if (rc > 0)
2196 return AE_CTRL_SKIP;
2197
2198 return AE_OK;
2199 }
2200
2201 void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state,
2202 u32 pm1a_ctrl, u32 pm1b_ctrl))
2203 {
2204 __acpi_os_prepare_sleep = func;
2205 }
2206
2207 acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state, u32 val_a,
2208 u32 val_b)
2209 {
2210 int rc = 0;
2211 if (__acpi_os_prepare_extended_sleep)
2212 rc = __acpi_os_prepare_extended_sleep(sleep_state,
2213 val_a, val_b);
2214 if (rc < 0)
2215 return AE_ERROR;
2216 else if (rc > 0)
2217 return AE_CTRL_SKIP;
2218
2219 return AE_OK;
2220 }
2221
2222 void acpi_os_set_prepare_extended_sleep(int (*func)(u8 sleep_state,
2223 u32 val_a, u32 val_b))
2224 {
2225 __acpi_os_prepare_extended_sleep = func;
2226 }
Linux kernel - Deliverables
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