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Merge commit 'v2.6.37-rc2' into sched/core
[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 * 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
30 #include <linux/module.h>
31 #include <linux/kernel.h>
32 #include <linux/slab.h>
33 #include <linux/mm.h>
34 #include <linux/pci.h>
35 #include <linux/interrupt.h>
36 #include <linux/kmod.h>
37 #include <linux/delay.h>
38 #include <linux/workqueue.h>
39 #include <linux/nmi.h>
40 #include <linux/acpi.h>
41 #include <linux/efi.h>
42 #include <linux/ioport.h>
43 #include <linux/list.h>
44 #include <linux/jiffies.h>
45 #include <linux/semaphore.h>
46
47 #include <asm/io.h>
48 #include <asm/uaccess.h>
49
50 #include <acpi/acpi.h>
51 #include <acpi/acpi_bus.h>
52 #include <acpi/processor.h>
53
54 #define _COMPONENT ACPI_OS_SERVICES
55 ACPI_MODULE_NAME("osl");
56 #define PREFIX "ACPI: "
57 struct acpi_os_dpc {
58 acpi_osd_exec_callback function;
59 void *context;
60 struct work_struct work;
61 int wait;
62 };
63
64 #ifdef CONFIG_ACPI_CUSTOM_DSDT
65 #include CONFIG_ACPI_CUSTOM_DSDT_FILE
66 #endif
67
68 #ifdef ENABLE_DEBUGGER
69 #include <linux/kdb.h>
70
71 /* stuff for debugger support */
72 int acpi_in_debugger;
73 EXPORT_SYMBOL(acpi_in_debugger);
74
75 extern char line_buf[80];
76 #endif /*ENABLE_DEBUGGER */
77
78 static unsigned int acpi_irq_irq;
79 static acpi_osd_handler acpi_irq_handler;
80 static void *acpi_irq_context;
81 static struct workqueue_struct *kacpid_wq;
82 static struct workqueue_struct *kacpi_notify_wq;
83 static struct workqueue_struct *kacpi_hotplug_wq;
84
85 struct acpi_res_list {
86 resource_size_t start;
87 resource_size_t end;
88 acpi_adr_space_type resource_type; /* IO port, System memory, ...*/
89 char name[5]; /* only can have a length of 4 chars, make use of this
90 one instead of res->name, no need to kalloc then */
91 struct list_head resource_list;
92 int count;
93 };
94
95 static LIST_HEAD(resource_list_head);
96 static DEFINE_SPINLOCK(acpi_res_lock);
97
98 /*
99 * This list of permanent mappings is for memory that may be accessed from
100 * interrupt context, where we can't do the ioremap().
101 */
102 struct acpi_ioremap {
103 struct list_head list;
104 void __iomem *virt;
105 acpi_physical_address phys;
106 acpi_size size;
107 struct kref ref;
108 };
109
110 static LIST_HEAD(acpi_ioremaps);
111 static DEFINE_SPINLOCK(acpi_ioremap_lock);
112
113 #define OSI_STRING_LENGTH_MAX 64 /* arbitrary */
114 static char osi_setup_string[OSI_STRING_LENGTH_MAX];
115
116 static void __init acpi_osi_setup_late(void);
117
118 /*
119 * The story of _OSI(Linux)
120 *
121 * From pre-history through Linux-2.6.22,
122 * Linux responded TRUE upon a BIOS OSI(Linux) query.
123 *
124 * Unfortunately, reference BIOS writers got wind of this
125 * and put OSI(Linux) in their example code, quickly exposing
126 * this string as ill-conceived and opening the door to
127 * an un-bounded number of BIOS incompatibilities.
128 *
129 * For example, OSI(Linux) was used on resume to re-POST a
130 * video card on one system, because Linux at that time
131 * could not do a speedy restore in its native driver.
132 * But then upon gaining quick native restore capability,
133 * Linux has no way to tell the BIOS to skip the time-consuming
134 * POST -- putting Linux at a permanent performance disadvantage.
135 * On another system, the BIOS writer used OSI(Linux)
136 * to infer native OS support for IPMI! On other systems,
137 * OSI(Linux) simply got in the way of Linux claiming to
138 * be compatible with other operating systems, exposing
139 * BIOS issues such as skipped device initialization.
140 *
141 * So "Linux" turned out to be a really poor chose of
142 * OSI string, and from Linux-2.6.23 onward we respond FALSE.
143 *
144 * BIOS writers should NOT query _OSI(Linux) on future systems.
145 * Linux will complain on the console when it sees it, and return FALSE.
146 * To get Linux to return TRUE for your system will require
147 * a kernel source update to add a DMI entry,
148 * or boot with "acpi_osi=Linux"
149 */
150
151 static struct osi_linux {
152 unsigned int enable:1;
153 unsigned int dmi:1;
154 unsigned int cmdline:1;
155 unsigned int known:1;
156 } osi_linux = { 0, 0, 0, 0};
157
158 static u32 acpi_osi_handler(acpi_string interface, u32 supported)
159 {
160 if (!strcmp("Linux", interface)) {
161
162 printk(KERN_NOTICE FW_BUG PREFIX
163 "BIOS _OSI(Linux) query %s%s\n",
164 osi_linux.enable ? "honored" : "ignored",
165 osi_linux.cmdline ? " via cmdline" :
166 osi_linux.dmi ? " via DMI" : "");
167 }
168
169 return supported;
170 }
171
172 static void __init acpi_request_region (struct acpi_generic_address *addr,
173 unsigned int length, char *desc)
174 {
175 if (!addr->address || !length)
176 return;
177
178 /* Resources are never freed */
179 if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_IO)
180 request_region(addr->address, length, desc);
181 else if (addr->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY)
182 request_mem_region(addr->address, length, desc);
183 }
184
185 static int __init acpi_reserve_resources(void)
186 {
187 acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length,
188 "ACPI PM1a_EVT_BLK");
189
190 acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length,
191 "ACPI PM1b_EVT_BLK");
192
193 acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length,
194 "ACPI PM1a_CNT_BLK");
195
196 acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length,
197 "ACPI PM1b_CNT_BLK");
198
199 if (acpi_gbl_FADT.pm_timer_length == 4)
200 acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR");
201
202 acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length,
203 "ACPI PM2_CNT_BLK");
204
205 /* Length of GPE blocks must be a non-negative multiple of 2 */
206
207 if (!(acpi_gbl_FADT.gpe0_block_length & 0x1))
208 acpi_request_region(&acpi_gbl_FADT.xgpe0_block,
209 acpi_gbl_FADT.gpe0_block_length, "ACPI GPE0_BLK");
210
211 if (!(acpi_gbl_FADT.gpe1_block_length & 0x1))
212 acpi_request_region(&acpi_gbl_FADT.xgpe1_block,
213 acpi_gbl_FADT.gpe1_block_length, "ACPI GPE1_BLK");
214
215 return 0;
216 }
217 device_initcall(acpi_reserve_resources);
218
219 void acpi_os_printf(const char *fmt, ...)
220 {
221 va_list args;
222 va_start(args, fmt);
223 acpi_os_vprintf(fmt, args);
224 va_end(args);
225 }
226
227 void acpi_os_vprintf(const char *fmt, va_list args)
228 {
229 static char buffer[512];
230
231 vsprintf(buffer, fmt, args);
232
233 #ifdef ENABLE_DEBUGGER
234 if (acpi_in_debugger) {
235 kdb_printf("%s", buffer);
236 } else {
237 printk(KERN_CONT "%s", buffer);
238 }
239 #else
240 printk(KERN_CONT "%s", buffer);
241 #endif
242 }
243
244 acpi_physical_address __init acpi_os_get_root_pointer(void)
245 {
246 if (efi_enabled) {
247 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
248 return efi.acpi20;
249 else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
250 return efi.acpi;
251 else {
252 printk(KERN_ERR PREFIX
253 "System description tables not found\n");
254 return 0;
255 }
256 } else {
257 acpi_physical_address pa = 0;
258
259 acpi_find_root_pointer(&pa);
260 return pa;
261 }
262 }
263
264 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
265 static struct acpi_ioremap *
266 acpi_map_lookup(acpi_physical_address phys, acpi_size size)
267 {
268 struct acpi_ioremap *map;
269
270 list_for_each_entry_rcu(map, &acpi_ioremaps, list)
271 if (map->phys <= phys &&
272 phys + size <= map->phys + map->size)
273 return map;
274
275 return NULL;
276 }
277
278 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
279 static void __iomem *
280 acpi_map_vaddr_lookup(acpi_physical_address phys, unsigned int size)
281 {
282 struct acpi_ioremap *map;
283
284 map = acpi_map_lookup(phys, size);
285 if (map)
286 return map->virt + (phys - map->phys);
287
288 return NULL;
289 }
290
291 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
292 static struct acpi_ioremap *
293 acpi_map_lookup_virt(void __iomem *virt, acpi_size size)
294 {
295 struct acpi_ioremap *map;
296
297 list_for_each_entry_rcu(map, &acpi_ioremaps, list)
298 if (map->virt <= virt &&
299 virt + size <= map->virt + map->size)
300 return map;
301
302 return NULL;
303 }
304
305 void __iomem *__init_refok
306 acpi_os_map_memory(acpi_physical_address phys, acpi_size size)
307 {
308 struct acpi_ioremap *map, *tmp_map;
309 unsigned long flags, pg_sz;
310 void __iomem *virt;
311 phys_addr_t pg_off;
312
313 if (phys > ULONG_MAX) {
314 printk(KERN_ERR PREFIX "Cannot map memory that high\n");
315 return NULL;
316 }
317
318 if (!acpi_gbl_permanent_mmap)
319 return __acpi_map_table((unsigned long)phys, size);
320
321 map = kzalloc(sizeof(*map), GFP_KERNEL);
322 if (!map)
323 return NULL;
324
325 pg_off = round_down(phys, PAGE_SIZE);
326 pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off;
327 virt = ioremap(pg_off, pg_sz);
328 if (!virt) {
329 kfree(map);
330 return NULL;
331 }
332
333 INIT_LIST_HEAD(&map->list);
334 map->virt = virt;
335 map->phys = pg_off;
336 map->size = pg_sz;
337 kref_init(&map->ref);
338
339 spin_lock_irqsave(&acpi_ioremap_lock, flags);
340 /* Check if page has already been mapped. */
341 tmp_map = acpi_map_lookup(phys, size);
342 if (tmp_map) {
343 kref_get(&tmp_map->ref);
344 spin_unlock_irqrestore(&acpi_ioremap_lock, flags);
345 iounmap(map->virt);
346 kfree(map);
347 return tmp_map->virt + (phys - tmp_map->phys);
348 }
349 list_add_tail_rcu(&map->list, &acpi_ioremaps);
350 spin_unlock_irqrestore(&acpi_ioremap_lock, flags);
351
352 return map->virt + (phys - map->phys);
353 }
354 EXPORT_SYMBOL_GPL(acpi_os_map_memory);
355
356 static void acpi_kref_del_iomap(struct kref *ref)
357 {
358 struct acpi_ioremap *map;
359
360 map = container_of(ref, struct acpi_ioremap, ref);
361 list_del_rcu(&map->list);
362 }
363
364 void __ref acpi_os_unmap_memory(void __iomem *virt, acpi_size size)
365 {
366 struct acpi_ioremap *map;
367 unsigned long flags;
368 int del;
369
370 if (!acpi_gbl_permanent_mmap) {
371 __acpi_unmap_table(virt, size);
372 return;
373 }
374
375 spin_lock_irqsave(&acpi_ioremap_lock, flags);
376 map = acpi_map_lookup_virt(virt, size);
377 if (!map) {
378 spin_unlock_irqrestore(&acpi_ioremap_lock, flags);
379 printk(KERN_ERR PREFIX "%s: bad address %p\n", __func__, virt);
380 dump_stack();
381 return;
382 }
383
384 del = kref_put(&map->ref, acpi_kref_del_iomap);
385 spin_unlock_irqrestore(&acpi_ioremap_lock, flags);
386
387 if (!del)
388 return;
389
390 synchronize_rcu();
391 iounmap(map->virt);
392 kfree(map);
393 }
394 EXPORT_SYMBOL_GPL(acpi_os_unmap_memory);
395
396 void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size)
397 {
398 if (!acpi_gbl_permanent_mmap)
399 __acpi_unmap_table(virt, size);
400 }
401
402 int acpi_os_map_generic_address(struct acpi_generic_address *addr)
403 {
404 void __iomem *virt;
405
406 if (addr->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
407 return 0;
408
409 if (!addr->address || !addr->bit_width)
410 return -EINVAL;
411
412 virt = acpi_os_map_memory(addr->address, addr->bit_width / 8);
413 if (!virt)
414 return -EIO;
415
416 return 0;
417 }
418 EXPORT_SYMBOL_GPL(acpi_os_map_generic_address);
419
420 void acpi_os_unmap_generic_address(struct acpi_generic_address *addr)
421 {
422 void __iomem *virt;
423 unsigned long flags;
424 acpi_size size = addr->bit_width / 8;
425
426 if (addr->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
427 return;
428
429 if (!addr->address || !addr->bit_width)
430 return;
431
432 spin_lock_irqsave(&acpi_ioremap_lock, flags);
433 virt = acpi_map_vaddr_lookup(addr->address, size);
434 spin_unlock_irqrestore(&acpi_ioremap_lock, flags);
435
436 acpi_os_unmap_memory(virt, size);
437 }
438 EXPORT_SYMBOL_GPL(acpi_os_unmap_generic_address);
439
440 #ifdef ACPI_FUTURE_USAGE
441 acpi_status
442 acpi_os_get_physical_address(void *virt, acpi_physical_address * phys)
443 {
444 if (!phys || !virt)
445 return AE_BAD_PARAMETER;
446
447 *phys = virt_to_phys(virt);
448
449 return AE_OK;
450 }
451 #endif
452
453 #define ACPI_MAX_OVERRIDE_LEN 100
454
455 static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN];
456
457 acpi_status
458 acpi_os_predefined_override(const struct acpi_predefined_names *init_val,
459 acpi_string * new_val)
460 {
461 if (!init_val || !new_val)
462 return AE_BAD_PARAMETER;
463
464 *new_val = NULL;
465 if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) {
466 printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n",
467 acpi_os_name);
468 *new_val = acpi_os_name;
469 }
470
471 return AE_OK;
472 }
473
474 acpi_status
475 acpi_os_table_override(struct acpi_table_header * existing_table,
476 struct acpi_table_header ** new_table)
477 {
478 if (!existing_table || !new_table)
479 return AE_BAD_PARAMETER;
480
481 *new_table = NULL;
482
483 #ifdef CONFIG_ACPI_CUSTOM_DSDT
484 if (strncmp(existing_table->signature, "DSDT", 4) == 0)
485 *new_table = (struct acpi_table_header *)AmlCode;
486 #endif
487 if (*new_table != NULL) {
488 printk(KERN_WARNING PREFIX "Override [%4.4s-%8.8s], "
489 "this is unsafe: tainting kernel\n",
490 existing_table->signature,
491 existing_table->oem_table_id);
492 add_taint(TAINT_OVERRIDDEN_ACPI_TABLE);
493 }
494 return AE_OK;
495 }
496
497 static irqreturn_t acpi_irq(int irq, void *dev_id)
498 {
499 u32 handled;
500
501 handled = (*acpi_irq_handler) (acpi_irq_context);
502
503 if (handled) {
504 acpi_irq_handled++;
505 return IRQ_HANDLED;
506 } else {
507 acpi_irq_not_handled++;
508 return IRQ_NONE;
509 }
510 }
511
512 acpi_status
513 acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler,
514 void *context)
515 {
516 unsigned int irq;
517
518 acpi_irq_stats_init();
519
520 /*
521 * Ignore the GSI from the core, and use the value in our copy of the
522 * FADT. It may not be the same if an interrupt source override exists
523 * for the SCI.
524 */
525 gsi = acpi_gbl_FADT.sci_interrupt;
526 if (acpi_gsi_to_irq(gsi, &irq) < 0) {
527 printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n",
528 gsi);
529 return AE_OK;
530 }
531
532 acpi_irq_handler = handler;
533 acpi_irq_context = context;
534 if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) {
535 printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq);
536 return AE_NOT_ACQUIRED;
537 }
538 acpi_irq_irq = irq;
539
540 return AE_OK;
541 }
542
543 acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler)
544 {
545 if (irq) {
546 free_irq(irq, acpi_irq);
547 acpi_irq_handler = NULL;
548 acpi_irq_irq = 0;
549 }
550
551 return AE_OK;
552 }
553
554 /*
555 * Running in interpreter thread context, safe to sleep
556 */
557
558 void acpi_os_sleep(u64 ms)
559 {
560 schedule_timeout_interruptible(msecs_to_jiffies(ms));
561 }
562
563 void acpi_os_stall(u32 us)
564 {
565 while (us) {
566 u32 delay = 1000;
567
568 if (delay > us)
569 delay = us;
570 udelay(delay);
571 touch_nmi_watchdog();
572 us -= delay;
573 }
574 }
575
576 /*
577 * Support ACPI 3.0 AML Timer operand
578 * Returns 64-bit free-running, monotonically increasing timer
579 * with 100ns granularity
580 */
581 u64 acpi_os_get_timer(void)
582 {
583 static u64 t;
584
585 #ifdef CONFIG_HPET
586 /* TBD: use HPET if available */
587 #endif
588
589 #ifdef CONFIG_X86_PM_TIMER
590 /* TBD: default to PM timer if HPET was not available */
591 #endif
592 if (!t)
593 printk(KERN_ERR PREFIX "acpi_os_get_timer() TBD\n");
594
595 return ++t;
596 }
597
598 acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width)
599 {
600 u32 dummy;
601
602 if (!value)
603 value = &dummy;
604
605 *value = 0;
606 if (width <= 8) {
607 *(u8 *) value = inb(port);
608 } else if (width <= 16) {
609 *(u16 *) value = inw(port);
610 } else if (width <= 32) {
611 *(u32 *) value = inl(port);
612 } else {
613 BUG();
614 }
615
616 return AE_OK;
617 }
618
619 EXPORT_SYMBOL(acpi_os_read_port);
620
621 acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width)
622 {
623 if (width <= 8) {
624 outb(value, port);
625 } else if (width <= 16) {
626 outw(value, port);
627 } else if (width <= 32) {
628 outl(value, port);
629 } else {
630 BUG();
631 }
632
633 return AE_OK;
634 }
635
636 EXPORT_SYMBOL(acpi_os_write_port);
637
638 acpi_status
639 acpi_os_read_memory(acpi_physical_address phys_addr, u32 * value, u32 width)
640 {
641 u32 dummy;
642 void __iomem *virt_addr;
643 int size = width / 8, unmap = 0;
644
645 rcu_read_lock();
646 virt_addr = acpi_map_vaddr_lookup(phys_addr, size);
647 rcu_read_unlock();
648 if (!virt_addr) {
649 virt_addr = ioremap(phys_addr, size);
650 unmap = 1;
651 }
652 if (!value)
653 value = &dummy;
654
655 switch (width) {
656 case 8:
657 *(u8 *) value = readb(virt_addr);
658 break;
659 case 16:
660 *(u16 *) value = readw(virt_addr);
661 break;
662 case 32:
663 *(u32 *) value = readl(virt_addr);
664 break;
665 default:
666 BUG();
667 }
668
669 if (unmap)
670 iounmap(virt_addr);
671
672 return AE_OK;
673 }
674
675 acpi_status
676 acpi_os_write_memory(acpi_physical_address phys_addr, u32 value, u32 width)
677 {
678 void __iomem *virt_addr;
679 int size = width / 8, unmap = 0;
680
681 rcu_read_lock();
682 virt_addr = acpi_map_vaddr_lookup(phys_addr, size);
683 rcu_read_unlock();
684 if (!virt_addr) {
685 virt_addr = ioremap(phys_addr, size);
686 unmap = 1;
687 }
688
689 switch (width) {
690 case 8:
691 writeb(value, virt_addr);
692 break;
693 case 16:
694 writew(value, virt_addr);
695 break;
696 case 32:
697 writel(value, virt_addr);
698 break;
699 default:
700 BUG();
701 }
702
703 if (unmap)
704 iounmap(virt_addr);
705
706 return AE_OK;
707 }
708
709 acpi_status
710 acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
711 u64 *value, u32 width)
712 {
713 int result, size;
714 u32 value32;
715
716 if (!value)
717 return AE_BAD_PARAMETER;
718
719 switch (width) {
720 case 8:
721 size = 1;
722 break;
723 case 16:
724 size = 2;
725 break;
726 case 32:
727 size = 4;
728 break;
729 default:
730 return AE_ERROR;
731 }
732
733 result = raw_pci_read(pci_id->segment, pci_id->bus,
734 PCI_DEVFN(pci_id->device, pci_id->function),
735 reg, size, &value32);
736 *value = value32;
737
738 return (result ? AE_ERROR : AE_OK);
739 }
740
741 acpi_status
742 acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
743 u64 value, u32 width)
744 {
745 int result, size;
746
747 switch (width) {
748 case 8:
749 size = 1;
750 break;
751 case 16:
752 size = 2;
753 break;
754 case 32:
755 size = 4;
756 break;
757 default:
758 return AE_ERROR;
759 }
760
761 result = raw_pci_write(pci_id->segment, pci_id->bus,
762 PCI_DEVFN(pci_id->device, pci_id->function),
763 reg, size, value);
764
765 return (result ? AE_ERROR : AE_OK);
766 }
767
768 static void acpi_os_execute_deferred(struct work_struct *work)
769 {
770 struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work);
771
772 if (dpc->wait)
773 acpi_os_wait_events_complete(NULL);
774
775 dpc->function(dpc->context);
776 kfree(dpc);
777 }
778
779 /*******************************************************************************
780 *
781 * FUNCTION: acpi_os_execute
782 *
783 * PARAMETERS: Type - Type of the callback
784 * Function - Function to be executed
785 * Context - Function parameters
786 *
787 * RETURN: Status
788 *
789 * DESCRIPTION: Depending on type, either queues function for deferred execution or
790 * immediately executes function on a separate thread.
791 *
792 ******************************************************************************/
793
794 static acpi_status __acpi_os_execute(acpi_execute_type type,
795 acpi_osd_exec_callback function, void *context, int hp)
796 {
797 acpi_status status = AE_OK;
798 struct acpi_os_dpc *dpc;
799 struct workqueue_struct *queue;
800 int ret;
801 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
802 "Scheduling function [%p(%p)] for deferred execution.\n",
803 function, context));
804
805 /*
806 * Allocate/initialize DPC structure. Note that this memory will be
807 * freed by the callee. The kernel handles the work_struct list in a
808 * way that allows us to also free its memory inside the callee.
809 * Because we may want to schedule several tasks with different
810 * parameters we can't use the approach some kernel code uses of
811 * having a static work_struct.
812 */
813
814 dpc = kmalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC);
815 if (!dpc)
816 return AE_NO_MEMORY;
817
818 dpc->function = function;
819 dpc->context = context;
820
821 /*
822 * We can't run hotplug code in keventd_wq/kacpid_wq/kacpid_notify_wq
823 * because the hotplug code may call driver .remove() functions,
824 * which invoke flush_scheduled_work/acpi_os_wait_events_complete
825 * to flush these workqueues.
826 */
827 queue = hp ? kacpi_hotplug_wq :
828 (type == OSL_NOTIFY_HANDLER ? kacpi_notify_wq : kacpid_wq);
829 dpc->wait = hp ? 1 : 0;
830
831 if (queue == kacpi_hotplug_wq)
832 INIT_WORK(&dpc->work, acpi_os_execute_deferred);
833 else if (queue == kacpi_notify_wq)
834 INIT_WORK(&dpc->work, acpi_os_execute_deferred);
835 else
836 INIT_WORK(&dpc->work, acpi_os_execute_deferred);
837
838 /*
839 * On some machines, a software-initiated SMI causes corruption unless
840 * the SMI runs on CPU 0. An SMI can be initiated by any AML, but
841 * typically it's done in GPE-related methods that are run via
842 * workqueues, so we can avoid the known corruption cases by always
843 * queueing on CPU 0.
844 */
845 ret = queue_work_on(0, queue, &dpc->work);
846
847 if (!ret) {
848 printk(KERN_ERR PREFIX
849 "Call to queue_work() failed.\n");
850 status = AE_ERROR;
851 kfree(dpc);
852 }
853 return status;
854 }
855
856 acpi_status acpi_os_execute(acpi_execute_type type,
857 acpi_osd_exec_callback function, void *context)
858 {
859 return __acpi_os_execute(type, function, context, 0);
860 }
861 EXPORT_SYMBOL(acpi_os_execute);
862
863 acpi_status acpi_os_hotplug_execute(acpi_osd_exec_callback function,
864 void *context)
865 {
866 return __acpi_os_execute(0, function, context, 1);
867 }
868
869 void acpi_os_wait_events_complete(void *context)
870 {
871 flush_workqueue(kacpid_wq);
872 flush_workqueue(kacpi_notify_wq);
873 }
874
875 EXPORT_SYMBOL(acpi_os_wait_events_complete);
876
877 /*
878 * Deallocate the memory for a spinlock.
879 */
880 void acpi_os_delete_lock(acpi_spinlock handle)
881 {
882 return;
883 }
884
885 acpi_status
886 acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle)
887 {
888 struct semaphore *sem = NULL;
889
890 sem = acpi_os_allocate(sizeof(struct semaphore));
891 if (!sem)
892 return AE_NO_MEMORY;
893 memset(sem, 0, sizeof(struct semaphore));
894
895 sema_init(sem, initial_units);
896
897 *handle = (acpi_handle *) sem;
898
899 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n",
900 *handle, initial_units));
901
902 return AE_OK;
903 }
904
905 /*
906 * TODO: A better way to delete semaphores? Linux doesn't have a
907 * 'delete_semaphore()' function -- may result in an invalid
908 * pointer dereference for non-synchronized consumers. Should
909 * we at least check for blocked threads and signal/cancel them?
910 */
911
912 acpi_status acpi_os_delete_semaphore(acpi_handle handle)
913 {
914 struct semaphore *sem = (struct semaphore *)handle;
915
916 if (!sem)
917 return AE_BAD_PARAMETER;
918
919 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle));
920
921 BUG_ON(!list_empty(&sem->wait_list));
922 kfree(sem);
923 sem = NULL;
924
925 return AE_OK;
926 }
927
928 /*
929 * TODO: Support for units > 1?
930 */
931 acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout)
932 {
933 acpi_status status = AE_OK;
934 struct semaphore *sem = (struct semaphore *)handle;
935 long jiffies;
936 int ret = 0;
937
938 if (!sem || (units < 1))
939 return AE_BAD_PARAMETER;
940
941 if (units > 1)
942 return AE_SUPPORT;
943
944 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n",
945 handle, units, timeout));
946
947 if (timeout == ACPI_WAIT_FOREVER)
948 jiffies = MAX_SCHEDULE_TIMEOUT;
949 else
950 jiffies = msecs_to_jiffies(timeout);
951
952 ret = down_timeout(sem, jiffies);
953 if (ret)
954 status = AE_TIME;
955
956 if (ACPI_FAILURE(status)) {
957 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
958 "Failed to acquire semaphore[%p|%d|%d], %s",
959 handle, units, timeout,
960 acpi_format_exception(status)));
961 } else {
962 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
963 "Acquired semaphore[%p|%d|%d]", handle,
964 units, timeout));
965 }
966
967 return status;
968 }
969
970 /*
971 * TODO: Support for units > 1?
972 */
973 acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units)
974 {
975 struct semaphore *sem = (struct semaphore *)handle;
976
977 if (!sem || (units < 1))
978 return AE_BAD_PARAMETER;
979
980 if (units > 1)
981 return AE_SUPPORT;
982
983 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle,
984 units));
985
986 up(sem);
987
988 return AE_OK;
989 }
990
991 #ifdef ACPI_FUTURE_USAGE
992 u32 acpi_os_get_line(char *buffer)
993 {
994
995 #ifdef ENABLE_DEBUGGER
996 if (acpi_in_debugger) {
997 u32 chars;
998
999 kdb_read(buffer, sizeof(line_buf));
1000
1001 /* remove the CR kdb includes */
1002 chars = strlen(buffer) - 1;
1003 buffer[chars] = '\0';
1004 }
1005 #endif
1006
1007 return 0;
1008 }
1009 #endif /* ACPI_FUTURE_USAGE */
1010
1011 acpi_status acpi_os_signal(u32 function, void *info)
1012 {
1013 switch (function) {
1014 case ACPI_SIGNAL_FATAL:
1015 printk(KERN_ERR PREFIX "Fatal opcode executed\n");
1016 break;
1017 case ACPI_SIGNAL_BREAKPOINT:
1018 /*
1019 * AML Breakpoint
1020 * ACPI spec. says to treat it as a NOP unless
1021 * you are debugging. So if/when we integrate
1022 * AML debugger into the kernel debugger its
1023 * hook will go here. But until then it is
1024 * not useful to print anything on breakpoints.
1025 */
1026 break;
1027 default:
1028 break;
1029 }
1030
1031 return AE_OK;
1032 }
1033
1034 static int __init acpi_os_name_setup(char *str)
1035 {
1036 char *p = acpi_os_name;
1037 int count = ACPI_MAX_OVERRIDE_LEN - 1;
1038
1039 if (!str || !*str)
1040 return 0;
1041
1042 for (; count-- && str && *str; str++) {
1043 if (isalnum(*str) || *str == ' ' || *str == ':')
1044 *p++ = *str;
1045 else if (*str == '\'' || *str == '"')
1046 continue;
1047 else
1048 break;
1049 }
1050 *p = 0;
1051
1052 return 1;
1053
1054 }
1055
1056 __setup("acpi_os_name=", acpi_os_name_setup);
1057
1058 static void __init set_osi_linux(unsigned int enable)
1059 {
1060 if (osi_linux.enable != enable) {
1061 osi_linux.enable = enable;
1062 printk(KERN_NOTICE PREFIX "%sed _OSI(Linux)\n",
1063 enable ? "Add": "Delet");
1064 }
1065
1066 if (osi_linux.enable)
1067 acpi_osi_setup("Linux");
1068 else
1069 acpi_osi_setup("!Linux");
1070
1071 return;
1072 }
1073
1074 static void __init acpi_cmdline_osi_linux(unsigned int enable)
1075 {
1076 osi_linux.cmdline = 1; /* cmdline set the default */
1077 set_osi_linux(enable);
1078
1079 return;
1080 }
1081
1082 void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d)
1083 {
1084 osi_linux.dmi = 1; /* DMI knows that this box asks OSI(Linux) */
1085
1086 printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident);
1087
1088 if (enable == -1)
1089 return;
1090
1091 osi_linux.known = 1; /* DMI knows which OSI(Linux) default needed */
1092
1093 set_osi_linux(enable);
1094
1095 return;
1096 }
1097
1098 /*
1099 * Modify the list of "OS Interfaces" reported to BIOS via _OSI
1100 *
1101 * empty string disables _OSI
1102 * string starting with '!' disables that string
1103 * otherwise string is added to list, augmenting built-in strings
1104 */
1105 static void __init acpi_osi_setup_late(void)
1106 {
1107 char *str = osi_setup_string;
1108
1109 if (*str == '\0')
1110 return;
1111
1112 if (!strcmp("!Linux", str)) {
1113 acpi_cmdline_osi_linux(0); /* !enable */
1114 } else if (*str == '!') {
1115 if (acpi_remove_interface(++str) == AE_OK)
1116 printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str);
1117 } else if (!strcmp("Linux", str)) {
1118 acpi_cmdline_osi_linux(1); /* enable */
1119 } else {
1120 if (acpi_install_interface(str) == AE_OK)
1121 printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str);
1122 }
1123 }
1124
1125 int __init acpi_osi_setup(char *str)
1126 {
1127 if (str == NULL || *str == '\0') {
1128 printk(KERN_INFO PREFIX "_OSI method disabled\n");
1129 acpi_gbl_create_osi_method = FALSE;
1130 } else {
1131 strncpy(osi_setup_string, str, OSI_STRING_LENGTH_MAX);
1132 }
1133
1134 return 1;
1135 }
1136
1137 __setup("acpi_osi=", acpi_osi_setup);
1138
1139 /* enable serialization to combat AE_ALREADY_EXISTS errors */
1140 static int __init acpi_serialize_setup(char *str)
1141 {
1142 printk(KERN_INFO PREFIX "serialize enabled\n");
1143
1144 acpi_gbl_all_methods_serialized = TRUE;
1145
1146 return 1;
1147 }
1148
1149 __setup("acpi_serialize", acpi_serialize_setup);
1150
1151 /* Check of resource interference between native drivers and ACPI
1152 * OperationRegions (SystemIO and System Memory only).
1153 * IO ports and memory declared in ACPI might be used by the ACPI subsystem
1154 * in arbitrary AML code and can interfere with legacy drivers.
1155 * acpi_enforce_resources= can be set to:
1156 *
1157 * - strict (default) (2)
1158 * -> further driver trying to access the resources will not load
1159 * - lax (1)
1160 * -> further driver trying to access the resources will load, but you
1161 * get a system message that something might go wrong...
1162 *
1163 * - no (0)
1164 * -> ACPI Operation Region resources will not be registered
1165 *
1166 */
1167 #define ENFORCE_RESOURCES_STRICT 2
1168 #define ENFORCE_RESOURCES_LAX 1
1169 #define ENFORCE_RESOURCES_NO 0
1170
1171 static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT;
1172
1173 static int __init acpi_enforce_resources_setup(char *str)
1174 {
1175 if (str == NULL || *str == '\0')
1176 return 0;
1177
1178 if (!strcmp("strict", str))
1179 acpi_enforce_resources = ENFORCE_RESOURCES_STRICT;
1180 else if (!strcmp("lax", str))
1181 acpi_enforce_resources = ENFORCE_RESOURCES_LAX;
1182 else if (!strcmp("no", str))
1183 acpi_enforce_resources = ENFORCE_RESOURCES_NO;
1184
1185 return 1;
1186 }
1187
1188 __setup("acpi_enforce_resources=", acpi_enforce_resources_setup);
1189
1190 /* Check for resource conflicts between ACPI OperationRegions and native
1191 * drivers */
1192 int acpi_check_resource_conflict(const struct resource *res)
1193 {
1194 struct acpi_res_list *res_list_elem;
1195 int ioport;
1196 int clash = 0;
1197
1198 if (acpi_enforce_resources == ENFORCE_RESOURCES_NO)
1199 return 0;
1200 if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM))
1201 return 0;
1202
1203 ioport = res->flags & IORESOURCE_IO;
1204
1205 spin_lock(&acpi_res_lock);
1206 list_for_each_entry(res_list_elem, &resource_list_head,
1207 resource_list) {
1208 if (ioport && (res_list_elem->resource_type
1209 != ACPI_ADR_SPACE_SYSTEM_IO))
1210 continue;
1211 if (!ioport && (res_list_elem->resource_type
1212 != ACPI_ADR_SPACE_SYSTEM_MEMORY))
1213 continue;
1214
1215 if (res->end < res_list_elem->start
1216 || res_list_elem->end < res->start)
1217 continue;
1218 clash = 1;
1219 break;
1220 }
1221 spin_unlock(&acpi_res_lock);
1222
1223 if (clash) {
1224 if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) {
1225 printk(KERN_WARNING "ACPI: resource %s %pR"
1226 " conflicts with ACPI region %s %pR\n",
1227 res->name, res, res_list_elem->name,
1228 res_list_elem);
1229 if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX)
1230 printk(KERN_NOTICE "ACPI: This conflict may"
1231 " cause random problems and system"
1232 " instability\n");
1233 printk(KERN_INFO "ACPI: If an ACPI driver is available"
1234 " for this device, you should use it instead of"
1235 " the native driver\n");
1236 }
1237 if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT)
1238 return -EBUSY;
1239 }
1240 return 0;
1241 }
1242 EXPORT_SYMBOL(acpi_check_resource_conflict);
1243
1244 int acpi_check_region(resource_size_t start, resource_size_t n,
1245 const char *name)
1246 {
1247 struct resource res = {
1248 .start = start,
1249 .end = start + n - 1,
1250 .name = name,
1251 .flags = IORESOURCE_IO,
1252 };
1253
1254 return acpi_check_resource_conflict(&res);
1255 }
1256 EXPORT_SYMBOL(acpi_check_region);
1257
1258 /*
1259 * Let drivers know whether the resource checks are effective
1260 */
1261 int acpi_resources_are_enforced(void)
1262 {
1263 return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT;
1264 }
1265 EXPORT_SYMBOL(acpi_resources_are_enforced);
1266
1267 /*
1268 * Acquire a spinlock.
1269 *
1270 * handle is a pointer to the spinlock_t.
1271 */
1272
1273 acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp)
1274 {
1275 acpi_cpu_flags flags;
1276 spin_lock_irqsave(lockp, flags);
1277 return flags;
1278 }
1279
1280 /*
1281 * Release a spinlock. See above.
1282 */
1283
1284 void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags)
1285 {
1286 spin_unlock_irqrestore(lockp, flags);
1287 }
1288
1289 #ifndef ACPI_USE_LOCAL_CACHE
1290
1291 /*******************************************************************************
1292 *
1293 * FUNCTION: acpi_os_create_cache
1294 *
1295 * PARAMETERS: name - Ascii name for the cache
1296 * size - Size of each cached object
1297 * depth - Maximum depth of the cache (in objects) <ignored>
1298 * cache - Where the new cache object is returned
1299 *
1300 * RETURN: status
1301 *
1302 * DESCRIPTION: Create a cache object
1303 *
1304 ******************************************************************************/
1305
1306 acpi_status
1307 acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache)
1308 {
1309 *cache = kmem_cache_create(name, size, 0, 0, NULL);
1310 if (*cache == NULL)
1311 return AE_ERROR;
1312 else
1313 return AE_OK;
1314 }
1315
1316 /*******************************************************************************
1317 *
1318 * FUNCTION: acpi_os_purge_cache
1319 *
1320 * PARAMETERS: Cache - Handle to cache object
1321 *
1322 * RETURN: Status
1323 *
1324 * DESCRIPTION: Free all objects within the requested cache.
1325 *
1326 ******************************************************************************/
1327
1328 acpi_status acpi_os_purge_cache(acpi_cache_t * cache)
1329 {
1330 kmem_cache_shrink(cache);
1331 return (AE_OK);
1332 }
1333
1334 /*******************************************************************************
1335 *
1336 * FUNCTION: acpi_os_delete_cache
1337 *
1338 * PARAMETERS: Cache - Handle to cache object
1339 *
1340 * RETURN: Status
1341 *
1342 * DESCRIPTION: Free all objects within the requested cache and delete the
1343 * cache object.
1344 *
1345 ******************************************************************************/
1346
1347 acpi_status acpi_os_delete_cache(acpi_cache_t * cache)
1348 {
1349 kmem_cache_destroy(cache);
1350 return (AE_OK);
1351 }
1352
1353 /*******************************************************************************
1354 *
1355 * FUNCTION: acpi_os_release_object
1356 *
1357 * PARAMETERS: Cache - Handle to cache object
1358 * Object - The object to be released
1359 *
1360 * RETURN: None
1361 *
1362 * DESCRIPTION: Release an object to the specified cache. If cache is full,
1363 * the object is deleted.
1364 *
1365 ******************************************************************************/
1366
1367 acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object)
1368 {
1369 kmem_cache_free(cache, object);
1370 return (AE_OK);
1371 }
1372
1373 static inline int acpi_res_list_add(struct acpi_res_list *res)
1374 {
1375 struct acpi_res_list *res_list_elem;
1376
1377 list_for_each_entry(res_list_elem, &resource_list_head,
1378 resource_list) {
1379
1380 if (res->resource_type == res_list_elem->resource_type &&
1381 res->start == res_list_elem->start &&
1382 res->end == res_list_elem->end) {
1383
1384 /*
1385 * The Region(addr,len) already exist in the list,
1386 * just increase the count
1387 */
1388
1389 res_list_elem->count++;
1390 return 0;
1391 }
1392 }
1393
1394 res->count = 1;
1395 list_add(&res->resource_list, &resource_list_head);
1396 return 1;
1397 }
1398
1399 static inline void acpi_res_list_del(struct acpi_res_list *res)
1400 {
1401 struct acpi_res_list *res_list_elem;
1402
1403 list_for_each_entry(res_list_elem, &resource_list_head,
1404 resource_list) {
1405
1406 if (res->resource_type == res_list_elem->resource_type &&
1407 res->start == res_list_elem->start &&
1408 res->end == res_list_elem->end) {
1409
1410 /*
1411 * If the res count is decreased to 0,
1412 * remove and free it
1413 */
1414
1415 if (--res_list_elem->count == 0) {
1416 list_del(&res_list_elem->resource_list);
1417 kfree(res_list_elem);
1418 }
1419 return;
1420 }
1421 }
1422 }
1423
1424 acpi_status
1425 acpi_os_invalidate_address(
1426 u8 space_id,
1427 acpi_physical_address address,
1428 acpi_size length)
1429 {
1430 struct acpi_res_list res;
1431
1432 switch (space_id) {
1433 case ACPI_ADR_SPACE_SYSTEM_IO:
1434 case ACPI_ADR_SPACE_SYSTEM_MEMORY:
1435 /* Only interference checks against SystemIO and SystemMemory
1436 are needed */
1437 res.start = address;
1438 res.end = address + length - 1;
1439 res.resource_type = space_id;
1440 spin_lock(&acpi_res_lock);
1441 acpi_res_list_del(&res);
1442 spin_unlock(&acpi_res_lock);
1443 break;
1444 case ACPI_ADR_SPACE_PCI_CONFIG:
1445 case ACPI_ADR_SPACE_EC:
1446 case ACPI_ADR_SPACE_SMBUS:
1447 case ACPI_ADR_SPACE_CMOS:
1448 case ACPI_ADR_SPACE_PCI_BAR_TARGET:
1449 case ACPI_ADR_SPACE_DATA_TABLE:
1450 case ACPI_ADR_SPACE_FIXED_HARDWARE:
1451 break;
1452 }
1453 return AE_OK;
1454 }
1455
1456 /******************************************************************************
1457 *
1458 * FUNCTION: acpi_os_validate_address
1459 *
1460 * PARAMETERS: space_id - ACPI space ID
1461 * address - Physical address
1462 * length - Address length
1463 *
1464 * RETURN: AE_OK if address/length is valid for the space_id. Otherwise,
1465 * should return AE_AML_ILLEGAL_ADDRESS.
1466 *
1467 * DESCRIPTION: Validate a system address via the host OS. Used to validate
1468 * the addresses accessed by AML operation regions.
1469 *
1470 *****************************************************************************/
1471
1472 acpi_status
1473 acpi_os_validate_address (
1474 u8 space_id,
1475 acpi_physical_address address,
1476 acpi_size length,
1477 char *name)
1478 {
1479 struct acpi_res_list *res;
1480 int added;
1481 if (acpi_enforce_resources == ENFORCE_RESOURCES_NO)
1482 return AE_OK;
1483
1484 switch (space_id) {
1485 case ACPI_ADR_SPACE_SYSTEM_IO:
1486 case ACPI_ADR_SPACE_SYSTEM_MEMORY:
1487 /* Only interference checks against SystemIO and SystemMemory
1488 are needed */
1489 res = kzalloc(sizeof(struct acpi_res_list), GFP_KERNEL);
1490 if (!res)
1491 return AE_OK;
1492 /* ACPI names are fixed to 4 bytes, still better use strlcpy */
1493 strlcpy(res->name, name, 5);
1494 res->start = address;
1495 res->end = address + length - 1;
1496 res->resource_type = space_id;
1497 spin_lock(&acpi_res_lock);
1498 added = acpi_res_list_add(res);
1499 spin_unlock(&acpi_res_lock);
1500 pr_debug("%s %s resource: start: 0x%llx, end: 0x%llx, "
1501 "name: %s\n", added ? "Added" : "Already exist",
1502 (space_id == ACPI_ADR_SPACE_SYSTEM_IO)
1503 ? "SystemIO" : "System Memory",
1504 (unsigned long long)res->start,
1505 (unsigned long long)res->end,
1506 res->name);
1507 if (!added)
1508 kfree(res);
1509 break;
1510 case ACPI_ADR_SPACE_PCI_CONFIG:
1511 case ACPI_ADR_SPACE_EC:
1512 case ACPI_ADR_SPACE_SMBUS:
1513 case ACPI_ADR_SPACE_CMOS:
1514 case ACPI_ADR_SPACE_PCI_BAR_TARGET:
1515 case ACPI_ADR_SPACE_DATA_TABLE:
1516 case ACPI_ADR_SPACE_FIXED_HARDWARE:
1517 break;
1518 }
1519 return AE_OK;
1520 }
1521 #endif
1522
1523 acpi_status __init acpi_os_initialize(void)
1524 {
1525 acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block);
1526 acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block);
1527 acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block);
1528 acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block);
1529
1530 return AE_OK;
1531 }
1532
1533 acpi_status acpi_os_initialize1(void)
1534 {
1535 kacpid_wq = create_workqueue("kacpid");
1536 kacpi_notify_wq = create_workqueue("kacpi_notify");
1537 kacpi_hotplug_wq = create_workqueue("kacpi_hotplug");
1538 BUG_ON(!kacpid_wq);
1539 BUG_ON(!kacpi_notify_wq);
1540 BUG_ON(!kacpi_hotplug_wq);
1541 acpi_install_interface_handler(acpi_osi_handler);
1542 acpi_osi_setup_late();
1543 return AE_OK;
1544 }
1545
1546 acpi_status acpi_os_terminate(void)
1547 {
1548 if (acpi_irq_handler) {
1549 acpi_os_remove_interrupt_handler(acpi_irq_irq,
1550 acpi_irq_handler);
1551 }
1552
1553 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe1_block);
1554 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block);
1555 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block);
1556 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block);
1557
1558 destroy_workqueue(kacpid_wq);
1559 destroy_workqueue(kacpi_notify_wq);
1560 destroy_workqueue(kacpi_hotplug_wq);
1561
1562 return AE_OK;
1563 }
Linux kernel - Deliverables
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