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amdkfd: Disable support for 32-bit user processes
[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/highmem.h>
35 #include <linux/pci.h>
36 #include <linux/interrupt.h>
37 #include <linux/kmod.h>
38 #include <linux/delay.h>
39 #include <linux/workqueue.h>
40 #include <linux/nmi.h>
41 #include <linux/acpi.h>
42 #include <linux/efi.h>
43 #include <linux/ioport.h>
44 #include <linux/list.h>
45 #include <linux/jiffies.h>
46 #include <linux/semaphore.h>
47
48 #include <asm/io.h>
49 #include <asm/uaccess.h>
50
51 #include "internal.h"
52
53 #define _COMPONENT ACPI_OS_SERVICES
54 ACPI_MODULE_NAME("osl");
55
56 struct acpi_os_dpc {
57 acpi_osd_exec_callback function;
58 void *context;
59 struct work_struct work;
60 };
61
62 #ifdef CONFIG_ACPI_CUSTOM_DSDT
63 #include CONFIG_ACPI_CUSTOM_DSDT_FILE
64 #endif
65
66 #ifdef ENABLE_DEBUGGER
67 #include <linux/kdb.h>
68
69 /* stuff for debugger support */
70 int acpi_in_debugger;
71 EXPORT_SYMBOL(acpi_in_debugger);
72
73 extern char line_buf[80];
74 #endif /*ENABLE_DEBUGGER */
75
76 static int (*__acpi_os_prepare_sleep)(u8 sleep_state, u32 pm1a_ctrl,
77 u32 pm1b_ctrl);
78 static int (*__acpi_os_prepare_extended_sleep)(u8 sleep_state, u32 val_a,
79 u32 val_b);
80
81 static acpi_osd_handler acpi_irq_handler;
82 static void *acpi_irq_context;
83 static struct workqueue_struct *kacpid_wq;
84 static struct workqueue_struct *kacpi_notify_wq;
85 static struct workqueue_struct *kacpi_hotplug_wq;
86
87 /*
88 * This list of permanent mappings is for memory that may be accessed from
89 * interrupt context, where we can't do the ioremap().
90 */
91 struct acpi_ioremap {
92 struct list_head list;
93 void __iomem *virt;
94 acpi_physical_address phys;
95 acpi_size size;
96 unsigned long refcount;
97 };
98
99 static LIST_HEAD(acpi_ioremaps);
100 static DEFINE_MUTEX(acpi_ioremap_lock);
101
102 static void __init acpi_osi_setup_late(void);
103
104 /*
105 * The story of _OSI(Linux)
106 *
107 * From pre-history through Linux-2.6.22,
108 * Linux responded TRUE upon a BIOS OSI(Linux) query.
109 *
110 * Unfortunately, reference BIOS writers got wind of this
111 * and put OSI(Linux) in their example code, quickly exposing
112 * this string as ill-conceived and opening the door to
113 * an un-bounded number of BIOS incompatibilities.
114 *
115 * For example, OSI(Linux) was used on resume to re-POST a
116 * video card on one system, because Linux at that time
117 * could not do a speedy restore in its native driver.
118 * But then upon gaining quick native restore capability,
119 * Linux has no way to tell the BIOS to skip the time-consuming
120 * POST -- putting Linux at a permanent performance disadvantage.
121 * On another system, the BIOS writer used OSI(Linux)
122 * to infer native OS support for IPMI! On other systems,
123 * OSI(Linux) simply got in the way of Linux claiming to
124 * be compatible with other operating systems, exposing
125 * BIOS issues such as skipped device initialization.
126 *
127 * So "Linux" turned out to be a really poor chose of
128 * OSI string, and from Linux-2.6.23 onward we respond FALSE.
129 *
130 * BIOS writers should NOT query _OSI(Linux) on future systems.
131 * Linux will complain on the console when it sees it, and return FALSE.
132 * To get Linux to return TRUE for your system will require
133 * a kernel source update to add a DMI entry,
134 * or boot with "acpi_osi=Linux"
135 */
136
137 static struct osi_linux {
138 unsigned int enable:1;
139 unsigned int dmi:1;
140 unsigned int cmdline:1;
141 unsigned int default_disabling:1;
142 } osi_linux = {0, 0, 0, 0};
143
144 static u32 acpi_osi_handler(acpi_string interface, u32 supported)
145 {
146 if (!strcmp("Linux", interface)) {
147
148 printk_once(KERN_NOTICE FW_BUG PREFIX
149 "BIOS _OSI(Linux) query %s%s\n",
150 osi_linux.enable ? "honored" : "ignored",
151 osi_linux.cmdline ? " via cmdline" :
152 osi_linux.dmi ? " via DMI" : "");
153 }
154
155 if (!strcmp("Darwin", interface)) {
156 /*
157 * Apple firmware will behave poorly if it receives positive
158 * answers to "Darwin" and any other OS. Respond positively
159 * to Darwin and then disable all other vendor strings.
160 */
161 acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS);
162 supported = ACPI_UINT32_MAX;
163 }
164
165 return supported;
166 }
167
168 static void __init acpi_request_region (struct acpi_generic_address *gas,
169 unsigned int length, char *desc)
170 {
171 u64 addr;
172
173 /* Handle possible alignment issues */
174 memcpy(&addr, &gas->address, sizeof(addr));
175 if (!addr || !length)
176 return;
177
178 /* Resources are never freed */
179 if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_IO)
180 request_region(addr, length, desc);
181 else if (gas->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY)
182 request_mem_region(addr, 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 #ifdef CONFIG_KEXEC
245 static unsigned long acpi_rsdp;
246 static int __init setup_acpi_rsdp(char *arg)
247 {
248 if (kstrtoul(arg, 16, &acpi_rsdp))
249 return -EINVAL;
250 return 0;
251 }
252 early_param("acpi_rsdp", setup_acpi_rsdp);
253 #endif
254
255 acpi_physical_address __init acpi_os_get_root_pointer(void)
256 {
257 #ifdef CONFIG_KEXEC
258 if (acpi_rsdp)
259 return acpi_rsdp;
260 #endif
261
262 if (efi_enabled(EFI_CONFIG_TABLES)) {
263 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
264 return efi.acpi20;
265 else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
266 return efi.acpi;
267 else {
268 printk(KERN_ERR PREFIX
269 "System description tables not found\n");
270 return 0;
271 }
272 } else if (IS_ENABLED(CONFIG_ACPI_LEGACY_TABLES_LOOKUP)) {
273 acpi_physical_address pa = 0;
274
275 acpi_find_root_pointer(&pa);
276 return pa;
277 }
278
279 return 0;
280 }
281
282 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
283 static struct acpi_ioremap *
284 acpi_map_lookup(acpi_physical_address phys, acpi_size size)
285 {
286 struct acpi_ioremap *map;
287
288 list_for_each_entry_rcu(map, &acpi_ioremaps, list)
289 if (map->phys <= phys &&
290 phys + size <= map->phys + map->size)
291 return map;
292
293 return NULL;
294 }
295
296 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
297 static void __iomem *
298 acpi_map_vaddr_lookup(acpi_physical_address phys, unsigned int size)
299 {
300 struct acpi_ioremap *map;
301
302 map = acpi_map_lookup(phys, size);
303 if (map)
304 return map->virt + (phys - map->phys);
305
306 return NULL;
307 }
308
309 void __iomem *acpi_os_get_iomem(acpi_physical_address phys, unsigned int size)
310 {
311 struct acpi_ioremap *map;
312 void __iomem *virt = NULL;
313
314 mutex_lock(&acpi_ioremap_lock);
315 map = acpi_map_lookup(phys, size);
316 if (map) {
317 virt = map->virt + (phys - map->phys);
318 map->refcount++;
319 }
320 mutex_unlock(&acpi_ioremap_lock);
321 return virt;
322 }
323 EXPORT_SYMBOL_GPL(acpi_os_get_iomem);
324
325 /* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
326 static struct acpi_ioremap *
327 acpi_map_lookup_virt(void __iomem *virt, acpi_size size)
328 {
329 struct acpi_ioremap *map;
330
331 list_for_each_entry_rcu(map, &acpi_ioremaps, list)
332 if (map->virt <= virt &&
333 virt + size <= map->virt + map->size)
334 return map;
335
336 return NULL;
337 }
338
339 #ifndef CONFIG_IA64
340 #define should_use_kmap(pfn) page_is_ram(pfn)
341 #else
342 /* ioremap will take care of cache attributes */
343 #define should_use_kmap(pfn) 0
344 #endif
345
346 static void __iomem *acpi_map(acpi_physical_address pg_off, unsigned long pg_sz)
347 {
348 unsigned long pfn;
349
350 pfn = pg_off >> PAGE_SHIFT;
351 if (should_use_kmap(pfn)) {
352 if (pg_sz > PAGE_SIZE)
353 return NULL;
354 return (void __iomem __force *)kmap(pfn_to_page(pfn));
355 } else
356 return acpi_os_ioremap(pg_off, pg_sz);
357 }
358
359 static void acpi_unmap(acpi_physical_address pg_off, void __iomem *vaddr)
360 {
361 unsigned long pfn;
362
363 pfn = pg_off >> PAGE_SHIFT;
364 if (should_use_kmap(pfn))
365 kunmap(pfn_to_page(pfn));
366 else
367 iounmap(vaddr);
368 }
369
370 void __iomem *__init_refok
371 acpi_os_map_iomem(acpi_physical_address phys, acpi_size size)
372 {
373 struct acpi_ioremap *map;
374 void __iomem *virt;
375 acpi_physical_address pg_off;
376 acpi_size pg_sz;
377
378 if (phys > ULONG_MAX) {
379 printk(KERN_ERR PREFIX "Cannot map memory that high\n");
380 return NULL;
381 }
382
383 if (!acpi_gbl_permanent_mmap)
384 return __acpi_map_table((unsigned long)phys, size);
385
386 mutex_lock(&acpi_ioremap_lock);
387 /* Check if there's a suitable mapping already. */
388 map = acpi_map_lookup(phys, size);
389 if (map) {
390 map->refcount++;
391 goto out;
392 }
393
394 map = kzalloc(sizeof(*map), GFP_KERNEL);
395 if (!map) {
396 mutex_unlock(&acpi_ioremap_lock);
397 return NULL;
398 }
399
400 pg_off = round_down(phys, PAGE_SIZE);
401 pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off;
402 virt = acpi_map(pg_off, pg_sz);
403 if (!virt) {
404 mutex_unlock(&acpi_ioremap_lock);
405 kfree(map);
406 return NULL;
407 }
408
409 INIT_LIST_HEAD(&map->list);
410 map->virt = virt;
411 map->phys = pg_off;
412 map->size = pg_sz;
413 map->refcount = 1;
414
415 list_add_tail_rcu(&map->list, &acpi_ioremaps);
416
417 out:
418 mutex_unlock(&acpi_ioremap_lock);
419 return map->virt + (phys - map->phys);
420 }
421 EXPORT_SYMBOL_GPL(acpi_os_map_iomem);
422
423 void *__init_refok
424 acpi_os_map_memory(acpi_physical_address phys, acpi_size size)
425 {
426 return (void *)acpi_os_map_iomem(phys, size);
427 }
428 EXPORT_SYMBOL_GPL(acpi_os_map_memory);
429
430 static void acpi_os_drop_map_ref(struct acpi_ioremap *map)
431 {
432 if (!--map->refcount)
433 list_del_rcu(&map->list);
434 }
435
436 static void acpi_os_map_cleanup(struct acpi_ioremap *map)
437 {
438 if (!map->refcount) {
439 synchronize_rcu();
440 acpi_unmap(map->phys, map->virt);
441 kfree(map);
442 }
443 }
444
445 void __ref acpi_os_unmap_iomem(void __iomem *virt, acpi_size size)
446 {
447 struct acpi_ioremap *map;
448
449 if (!acpi_gbl_permanent_mmap) {
450 __acpi_unmap_table(virt, size);
451 return;
452 }
453
454 mutex_lock(&acpi_ioremap_lock);
455 map = acpi_map_lookup_virt(virt, size);
456 if (!map) {
457 mutex_unlock(&acpi_ioremap_lock);
458 WARN(true, PREFIX "%s: bad address %p\n", __func__, virt);
459 return;
460 }
461 acpi_os_drop_map_ref(map);
462 mutex_unlock(&acpi_ioremap_lock);
463
464 acpi_os_map_cleanup(map);
465 }
466 EXPORT_SYMBOL_GPL(acpi_os_unmap_iomem);
467
468 void __ref acpi_os_unmap_memory(void *virt, acpi_size size)
469 {
470 return acpi_os_unmap_iomem((void __iomem *)virt, size);
471 }
472 EXPORT_SYMBOL_GPL(acpi_os_unmap_memory);
473
474 void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size)
475 {
476 if (!acpi_gbl_permanent_mmap)
477 __acpi_unmap_table(virt, size);
478 }
479
480 int acpi_os_map_generic_address(struct acpi_generic_address *gas)
481 {
482 u64 addr;
483 void __iomem *virt;
484
485 if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
486 return 0;
487
488 /* Handle possible alignment issues */
489 memcpy(&addr, &gas->address, sizeof(addr));
490 if (!addr || !gas->bit_width)
491 return -EINVAL;
492
493 virt = acpi_os_map_iomem(addr, gas->bit_width / 8);
494 if (!virt)
495 return -EIO;
496
497 return 0;
498 }
499 EXPORT_SYMBOL(acpi_os_map_generic_address);
500
501 void acpi_os_unmap_generic_address(struct acpi_generic_address *gas)
502 {
503 u64 addr;
504 struct acpi_ioremap *map;
505
506 if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
507 return;
508
509 /* Handle possible alignment issues */
510 memcpy(&addr, &gas->address, sizeof(addr));
511 if (!addr || !gas->bit_width)
512 return;
513
514 mutex_lock(&acpi_ioremap_lock);
515 map = acpi_map_lookup(addr, gas->bit_width / 8);
516 if (!map) {
517 mutex_unlock(&acpi_ioremap_lock);
518 return;
519 }
520 acpi_os_drop_map_ref(map);
521 mutex_unlock(&acpi_ioremap_lock);
522
523 acpi_os_map_cleanup(map);
524 }
525 EXPORT_SYMBOL(acpi_os_unmap_generic_address);
526
527 #ifdef ACPI_FUTURE_USAGE
528 acpi_status
529 acpi_os_get_physical_address(void *virt, acpi_physical_address * phys)
530 {
531 if (!phys || !virt)
532 return AE_BAD_PARAMETER;
533
534 *phys = virt_to_phys(virt);
535
536 return AE_OK;
537 }
538 #endif
539
540 #define ACPI_MAX_OVERRIDE_LEN 100
541
542 static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN];
543
544 acpi_status
545 acpi_os_predefined_override(const struct acpi_predefined_names *init_val,
546 acpi_string * new_val)
547 {
548 if (!init_val || !new_val)
549 return AE_BAD_PARAMETER;
550
551 *new_val = NULL;
552 if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) {
553 printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n",
554 acpi_os_name);
555 *new_val = acpi_os_name;
556 }
557
558 return AE_OK;
559 }
560
561 #ifdef CONFIG_ACPI_INITRD_TABLE_OVERRIDE
562 #include <linux/earlycpio.h>
563 #include <linux/memblock.h>
564
565 static u64 acpi_tables_addr;
566 static int all_tables_size;
567
568 /* Copied from acpica/tbutils.c:acpi_tb_checksum() */
569 static u8 __init acpi_table_checksum(u8 *buffer, u32 length)
570 {
571 u8 sum = 0;
572 u8 *end = buffer + length;
573
574 while (buffer < end)
575 sum = (u8) (sum + *(buffer++));
576 return sum;
577 }
578
579 /* All but ACPI_SIG_RSDP and ACPI_SIG_FACS: */
580 static const char * const table_sigs[] = {
581 ACPI_SIG_BERT, ACPI_SIG_CPEP, ACPI_SIG_ECDT, ACPI_SIG_EINJ,
582 ACPI_SIG_ERST, ACPI_SIG_HEST, ACPI_SIG_MADT, ACPI_SIG_MSCT,
583 ACPI_SIG_SBST, ACPI_SIG_SLIT, ACPI_SIG_SRAT, ACPI_SIG_ASF,
584 ACPI_SIG_BOOT, ACPI_SIG_DBGP, ACPI_SIG_DMAR, ACPI_SIG_HPET,
585 ACPI_SIG_IBFT, ACPI_SIG_IVRS, ACPI_SIG_MCFG, ACPI_SIG_MCHI,
586 ACPI_SIG_SLIC, ACPI_SIG_SPCR, ACPI_SIG_SPMI, ACPI_SIG_TCPA,
587 ACPI_SIG_UEFI, ACPI_SIG_WAET, ACPI_SIG_WDAT, ACPI_SIG_WDDT,
588 ACPI_SIG_WDRT, ACPI_SIG_DSDT, ACPI_SIG_FADT, ACPI_SIG_PSDT,
589 ACPI_SIG_RSDT, ACPI_SIG_XSDT, ACPI_SIG_SSDT, NULL };
590
591 #define ACPI_HEADER_SIZE sizeof(struct acpi_table_header)
592
593 #define ACPI_OVERRIDE_TABLES 64
594 static struct cpio_data __initdata acpi_initrd_files[ACPI_OVERRIDE_TABLES];
595
596 #define MAP_CHUNK_SIZE (NR_FIX_BTMAPS << PAGE_SHIFT)
597
598 void __init acpi_initrd_override(void *data, size_t size)
599 {
600 int sig, no, table_nr = 0, total_offset = 0;
601 long offset = 0;
602 struct acpi_table_header *table;
603 char cpio_path[32] = "kernel/firmware/acpi/";
604 struct cpio_data file;
605
606 if (data == NULL || size == 0)
607 return;
608
609 for (no = 0; no < ACPI_OVERRIDE_TABLES; no++) {
610 file = find_cpio_data(cpio_path, data, size, &offset);
611 if (!file.data)
612 break;
613
614 data += offset;
615 size -= offset;
616
617 if (file.size < sizeof(struct acpi_table_header)) {
618 pr_err("ACPI OVERRIDE: Table smaller than ACPI header [%s%s]\n",
619 cpio_path, file.name);
620 continue;
621 }
622
623 table = file.data;
624
625 for (sig = 0; table_sigs[sig]; sig++)
626 if (!memcmp(table->signature, table_sigs[sig], 4))
627 break;
628
629 if (!table_sigs[sig]) {
630 pr_err("ACPI OVERRIDE: Unknown signature [%s%s]\n",
631 cpio_path, file.name);
632 continue;
633 }
634 if (file.size != table->length) {
635 pr_err("ACPI OVERRIDE: File length does not match table length [%s%s]\n",
636 cpio_path, file.name);
637 continue;
638 }
639 if (acpi_table_checksum(file.data, table->length)) {
640 pr_err("ACPI OVERRIDE: Bad table checksum [%s%s]\n",
641 cpio_path, file.name);
642 continue;
643 }
644
645 pr_info("%4.4s ACPI table found in initrd [%s%s][0x%x]\n",
646 table->signature, cpio_path, file.name, table->length);
647
648 all_tables_size += table->length;
649 acpi_initrd_files[table_nr].data = file.data;
650 acpi_initrd_files[table_nr].size = file.size;
651 table_nr++;
652 }
653 if (table_nr == 0)
654 return;
655
656 acpi_tables_addr =
657 memblock_find_in_range(0, max_low_pfn_mapped << PAGE_SHIFT,
658 all_tables_size, PAGE_SIZE);
659 if (!acpi_tables_addr) {
660 WARN_ON(1);
661 return;
662 }
663 /*
664 * Only calling e820_add_reserve does not work and the
665 * tables are invalid (memory got used) later.
666 * memblock_reserve works as expected and the tables won't get modified.
667 * But it's not enough on X86 because ioremap will
668 * complain later (used by acpi_os_map_memory) that the pages
669 * that should get mapped are not marked "reserved".
670 * Both memblock_reserve and e820_add_region (via arch_reserve_mem_area)
671 * works fine.
672 */
673 memblock_reserve(acpi_tables_addr, all_tables_size);
674 arch_reserve_mem_area(acpi_tables_addr, all_tables_size);
675
676 /*
677 * early_ioremap only can remap 256k one time. If we map all
678 * tables one time, we will hit the limit. Need to map chunks
679 * one by one during copying the same as that in relocate_initrd().
680 */
681 for (no = 0; no < table_nr; no++) {
682 unsigned char *src_p = acpi_initrd_files[no].data;
683 phys_addr_t size = acpi_initrd_files[no].size;
684 phys_addr_t dest_addr = acpi_tables_addr + total_offset;
685 phys_addr_t slop, clen;
686 char *dest_p;
687
688 total_offset += size;
689
690 while (size) {
691 slop = dest_addr & ~PAGE_MASK;
692 clen = size;
693 if (clen > MAP_CHUNK_SIZE - slop)
694 clen = MAP_CHUNK_SIZE - slop;
695 dest_p = early_ioremap(dest_addr & PAGE_MASK,
696 clen + slop);
697 memcpy(dest_p + slop, src_p, clen);
698 early_iounmap(dest_p, clen + slop);
699 src_p += clen;
700 dest_addr += clen;
701 size -= clen;
702 }
703 }
704 }
705 #endif /* CONFIG_ACPI_INITRD_TABLE_OVERRIDE */
706
707 static void acpi_table_taint(struct acpi_table_header *table)
708 {
709 pr_warn(PREFIX
710 "Override [%4.4s-%8.8s], this is unsafe: tainting kernel\n",
711 table->signature, table->oem_table_id);
712 add_taint(TAINT_OVERRIDDEN_ACPI_TABLE, LOCKDEP_NOW_UNRELIABLE);
713 }
714
715
716 acpi_status
717 acpi_os_table_override(struct acpi_table_header * existing_table,
718 struct acpi_table_header ** new_table)
719 {
720 if (!existing_table || !new_table)
721 return AE_BAD_PARAMETER;
722
723 *new_table = NULL;
724
725 #ifdef CONFIG_ACPI_CUSTOM_DSDT
726 if (strncmp(existing_table->signature, "DSDT", 4) == 0)
727 *new_table = (struct acpi_table_header *)AmlCode;
728 #endif
729 if (*new_table != NULL)
730 acpi_table_taint(existing_table);
731 return AE_OK;
732 }
733
734 acpi_status
735 acpi_os_physical_table_override(struct acpi_table_header *existing_table,
736 acpi_physical_address *address,
737 u32 *table_length)
738 {
739 #ifndef CONFIG_ACPI_INITRD_TABLE_OVERRIDE
740 *table_length = 0;
741 *address = 0;
742 return AE_OK;
743 #else
744 int table_offset = 0;
745 struct acpi_table_header *table;
746
747 *table_length = 0;
748 *address = 0;
749
750 if (!acpi_tables_addr)
751 return AE_OK;
752
753 do {
754 if (table_offset + ACPI_HEADER_SIZE > all_tables_size) {
755 WARN_ON(1);
756 return AE_OK;
757 }
758
759 table = acpi_os_map_memory(acpi_tables_addr + table_offset,
760 ACPI_HEADER_SIZE);
761
762 if (table_offset + table->length > all_tables_size) {
763 acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
764 WARN_ON(1);
765 return AE_OK;
766 }
767
768 table_offset += table->length;
769
770 if (memcmp(existing_table->signature, table->signature, 4)) {
771 acpi_os_unmap_memory(table,
772 ACPI_HEADER_SIZE);
773 continue;
774 }
775
776 /* Only override tables with matching oem id */
777 if (memcmp(table->oem_table_id, existing_table->oem_table_id,
778 ACPI_OEM_TABLE_ID_SIZE)) {
779 acpi_os_unmap_memory(table,
780 ACPI_HEADER_SIZE);
781 continue;
782 }
783
784 table_offset -= table->length;
785 *table_length = table->length;
786 acpi_os_unmap_memory(table, ACPI_HEADER_SIZE);
787 *address = acpi_tables_addr + table_offset;
788 break;
789 } while (table_offset + ACPI_HEADER_SIZE < all_tables_size);
790
791 if (*address != 0)
792 acpi_table_taint(existing_table);
793 return AE_OK;
794 #endif
795 }
796
797 static irqreturn_t acpi_irq(int irq, void *dev_id)
798 {
799 u32 handled;
800
801 handled = (*acpi_irq_handler) (acpi_irq_context);
802
803 if (handled) {
804 acpi_irq_handled++;
805 return IRQ_HANDLED;
806 } else {
807 acpi_irq_not_handled++;
808 return IRQ_NONE;
809 }
810 }
811
812 acpi_status
813 acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler,
814 void *context)
815 {
816 unsigned int irq;
817
818 acpi_irq_stats_init();
819
820 /*
821 * ACPI interrupts different from the SCI in our copy of the FADT are
822 * not supported.
823 */
824 if (gsi != acpi_gbl_FADT.sci_interrupt)
825 return AE_BAD_PARAMETER;
826
827 if (acpi_irq_handler)
828 return AE_ALREADY_ACQUIRED;
829
830 if (acpi_gsi_to_irq(gsi, &irq) < 0) {
831 printk(KERN_ERR PREFIX "SCI (ACPI GSI %d) not registered\n",
832 gsi);
833 return AE_OK;
834 }
835
836 acpi_irq_handler = handler;
837 acpi_irq_context = context;
838 if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) {
839 printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq);
840 acpi_irq_handler = NULL;
841 return AE_NOT_ACQUIRED;
842 }
843
844 return AE_OK;
845 }
846
847 acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler)
848 {
849 if (irq != acpi_gbl_FADT.sci_interrupt)
850 return AE_BAD_PARAMETER;
851
852 free_irq(irq, acpi_irq);
853 acpi_irq_handler = NULL;
854
855 return AE_OK;
856 }
857
858 /*
859 * Running in interpreter thread context, safe to sleep
860 */
861
862 void acpi_os_sleep(u64 ms)
863 {
864 msleep(ms);
865 }
866
867 void acpi_os_stall(u32 us)
868 {
869 while (us) {
870 u32 delay = 1000;
871
872 if (delay > us)
873 delay = us;
874 udelay(delay);
875 touch_nmi_watchdog();
876 us -= delay;
877 }
878 }
879
880 /*
881 * Support ACPI 3.0 AML Timer operand
882 * Returns 64-bit free-running, monotonically increasing timer
883 * with 100ns granularity
884 */
885 u64 acpi_os_get_timer(void)
886 {
887 u64 time_ns = ktime_to_ns(ktime_get());
888 do_div(time_ns, 100);
889 return time_ns;
890 }
891
892 acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width)
893 {
894 u32 dummy;
895
896 if (!value)
897 value = &dummy;
898
899 *value = 0;
900 if (width <= 8) {
901 *(u8 *) value = inb(port);
902 } else if (width <= 16) {
903 *(u16 *) value = inw(port);
904 } else if (width <= 32) {
905 *(u32 *) value = inl(port);
906 } else {
907 BUG();
908 }
909
910 return AE_OK;
911 }
912
913 EXPORT_SYMBOL(acpi_os_read_port);
914
915 acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width)
916 {
917 if (width <= 8) {
918 outb(value, port);
919 } else if (width <= 16) {
920 outw(value, port);
921 } else if (width <= 32) {
922 outl(value, port);
923 } else {
924 BUG();
925 }
926
927 return AE_OK;
928 }
929
930 EXPORT_SYMBOL(acpi_os_write_port);
931
932 #ifdef readq
933 static inline u64 read64(const volatile void __iomem *addr)
934 {
935 return readq(addr);
936 }
937 #else
938 static inline u64 read64(const volatile void __iomem *addr)
939 {
940 u64 l, h;
941 l = readl(addr);
942 h = readl(addr+4);
943 return l | (h << 32);
944 }
945 #endif
946
947 acpi_status
948 acpi_os_read_memory(acpi_physical_address phys_addr, u64 *value, u32 width)
949 {
950 void __iomem *virt_addr;
951 unsigned int size = width / 8;
952 bool unmap = false;
953 u64 dummy;
954
955 rcu_read_lock();
956 virt_addr = acpi_map_vaddr_lookup(phys_addr, size);
957 if (!virt_addr) {
958 rcu_read_unlock();
959 virt_addr = acpi_os_ioremap(phys_addr, size);
960 if (!virt_addr)
961 return AE_BAD_ADDRESS;
962 unmap = true;
963 }
964
965 if (!value)
966 value = &dummy;
967
968 switch (width) {
969 case 8:
970 *(u8 *) value = readb(virt_addr);
971 break;
972 case 16:
973 *(u16 *) value = readw(virt_addr);
974 break;
975 case 32:
976 *(u32 *) value = readl(virt_addr);
977 break;
978 case 64:
979 *(u64 *) value = read64(virt_addr);
980 break;
981 default:
982 BUG();
983 }
984
985 if (unmap)
986 iounmap(virt_addr);
987 else
988 rcu_read_unlock();
989
990 return AE_OK;
991 }
992
993 #ifdef writeq
994 static inline void write64(u64 val, volatile void __iomem *addr)
995 {
996 writeq(val, addr);
997 }
998 #else
999 static inline void write64(u64 val, volatile void __iomem *addr)
1000 {
1001 writel(val, addr);
1002 writel(val>>32, addr+4);
1003 }
1004 #endif
1005
1006 acpi_status
1007 acpi_os_write_memory(acpi_physical_address phys_addr, u64 value, u32 width)
1008 {
1009 void __iomem *virt_addr;
1010 unsigned int size = width / 8;
1011 bool unmap = false;
1012
1013 rcu_read_lock();
1014 virt_addr = acpi_map_vaddr_lookup(phys_addr, size);
1015 if (!virt_addr) {
1016 rcu_read_unlock();
1017 virt_addr = acpi_os_ioremap(phys_addr, size);
1018 if (!virt_addr)
1019 return AE_BAD_ADDRESS;
1020 unmap = true;
1021 }
1022
1023 switch (width) {
1024 case 8:
1025 writeb(value, virt_addr);
1026 break;
1027 case 16:
1028 writew(value, virt_addr);
1029 break;
1030 case 32:
1031 writel(value, virt_addr);
1032 break;
1033 case 64:
1034 write64(value, virt_addr);
1035 break;
1036 default:
1037 BUG();
1038 }
1039
1040 if (unmap)
1041 iounmap(virt_addr);
1042 else
1043 rcu_read_unlock();
1044
1045 return AE_OK;
1046 }
1047
1048 acpi_status
1049 acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
1050 u64 *value, u32 width)
1051 {
1052 int result, size;
1053 u32 value32;
1054
1055 if (!value)
1056 return AE_BAD_PARAMETER;
1057
1058 switch (width) {
1059 case 8:
1060 size = 1;
1061 break;
1062 case 16:
1063 size = 2;
1064 break;
1065 case 32:
1066 size = 4;
1067 break;
1068 default:
1069 return AE_ERROR;
1070 }
1071
1072 result = raw_pci_read(pci_id->segment, pci_id->bus,
1073 PCI_DEVFN(pci_id->device, pci_id->function),
1074 reg, size, &value32);
1075 *value = value32;
1076
1077 return (result ? AE_ERROR : AE_OK);
1078 }
1079
1080 acpi_status
1081 acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
1082 u64 value, u32 width)
1083 {
1084 int result, size;
1085
1086 switch (width) {
1087 case 8:
1088 size = 1;
1089 break;
1090 case 16:
1091 size = 2;
1092 break;
1093 case 32:
1094 size = 4;
1095 break;
1096 default:
1097 return AE_ERROR;
1098 }
1099
1100 result = raw_pci_write(pci_id->segment, pci_id->bus,
1101 PCI_DEVFN(pci_id->device, pci_id->function),
1102 reg, size, value);
1103
1104 return (result ? AE_ERROR : AE_OK);
1105 }
1106
1107 static void acpi_os_execute_deferred(struct work_struct *work)
1108 {
1109 struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work);
1110
1111 dpc->function(dpc->context);
1112 kfree(dpc);
1113 }
1114
1115 /*******************************************************************************
1116 *
1117 * FUNCTION: acpi_os_execute
1118 *
1119 * PARAMETERS: Type - Type of the callback
1120 * Function - Function to be executed
1121 * Context - Function parameters
1122 *
1123 * RETURN: Status
1124 *
1125 * DESCRIPTION: Depending on type, either queues function for deferred execution or
1126 * immediately executes function on a separate thread.
1127 *
1128 ******************************************************************************/
1129
1130 acpi_status acpi_os_execute(acpi_execute_type type,
1131 acpi_osd_exec_callback function, void *context)
1132 {
1133 acpi_status status = AE_OK;
1134 struct acpi_os_dpc *dpc;
1135 struct workqueue_struct *queue;
1136 int ret;
1137 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
1138 "Scheduling function [%p(%p)] for deferred execution.\n",
1139 function, context));
1140
1141 /*
1142 * Allocate/initialize DPC structure. Note that this memory will be
1143 * freed by the callee. The kernel handles the work_struct list in a
1144 * way that allows us to also free its memory inside the callee.
1145 * Because we may want to schedule several tasks with different
1146 * parameters we can't use the approach some kernel code uses of
1147 * having a static work_struct.
1148 */
1149
1150 dpc = kzalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC);
1151 if (!dpc)
1152 return AE_NO_MEMORY;
1153
1154 dpc->function = function;
1155 dpc->context = context;
1156
1157 /*
1158 * To prevent lockdep from complaining unnecessarily, make sure that
1159 * there is a different static lockdep key for each workqueue by using
1160 * INIT_WORK() for each of them separately.
1161 */
1162 if (type == OSL_NOTIFY_HANDLER) {
1163 queue = kacpi_notify_wq;
1164 INIT_WORK(&dpc->work, acpi_os_execute_deferred);
1165 } else {
1166 queue = kacpid_wq;
1167 INIT_WORK(&dpc->work, acpi_os_execute_deferred);
1168 }
1169
1170 /*
1171 * On some machines, a software-initiated SMI causes corruption unless
1172 * the SMI runs on CPU 0. An SMI can be initiated by any AML, but
1173 * typically it's done in GPE-related methods that are run via
1174 * workqueues, so we can avoid the known corruption cases by always
1175 * queueing on CPU 0.
1176 */
1177 ret = queue_work_on(0, queue, &dpc->work);
1178
1179 if (!ret) {
1180 printk(KERN_ERR PREFIX
1181 "Call to queue_work() failed.\n");
1182 status = AE_ERROR;
1183 kfree(dpc);
1184 }
1185 return status;
1186 }
1187 EXPORT_SYMBOL(acpi_os_execute);
1188
1189 void acpi_os_wait_events_complete(void)
1190 {
1191 flush_workqueue(kacpid_wq);
1192 flush_workqueue(kacpi_notify_wq);
1193 }
1194
1195 struct acpi_hp_work {
1196 struct work_struct work;
1197 struct acpi_device *adev;
1198 u32 src;
1199 };
1200
1201 static void acpi_hotplug_work_fn(struct work_struct *work)
1202 {
1203 struct acpi_hp_work *hpw = container_of(work, struct acpi_hp_work, work);
1204
1205 acpi_os_wait_events_complete();
1206 acpi_device_hotplug(hpw->adev, hpw->src);
1207 kfree(hpw);
1208 }
1209
1210 acpi_status acpi_hotplug_schedule(struct acpi_device *adev, u32 src)
1211 {
1212 struct acpi_hp_work *hpw;
1213
1214 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
1215 "Scheduling hotplug event (%p, %u) for deferred execution.\n",
1216 adev, src));
1217
1218 hpw = kmalloc(sizeof(*hpw), GFP_KERNEL);
1219 if (!hpw)
1220 return AE_NO_MEMORY;
1221
1222 INIT_WORK(&hpw->work, acpi_hotplug_work_fn);
1223 hpw->adev = adev;
1224 hpw->src = src;
1225 /*
1226 * We can't run hotplug code in kacpid_wq/kacpid_notify_wq etc., because
1227 * the hotplug code may call driver .remove() functions, which may
1228 * invoke flush_scheduled_work()/acpi_os_wait_events_complete() to flush
1229 * these workqueues.
1230 */
1231 if (!queue_work(kacpi_hotplug_wq, &hpw->work)) {
1232 kfree(hpw);
1233 return AE_ERROR;
1234 }
1235 return AE_OK;
1236 }
1237
1238 bool acpi_queue_hotplug_work(struct work_struct *work)
1239 {
1240 return queue_work(kacpi_hotplug_wq, work);
1241 }
1242
1243 acpi_status
1244 acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle)
1245 {
1246 struct semaphore *sem = NULL;
1247
1248 sem = acpi_os_allocate_zeroed(sizeof(struct semaphore));
1249 if (!sem)
1250 return AE_NO_MEMORY;
1251
1252 sema_init(sem, initial_units);
1253
1254 *handle = (acpi_handle *) sem;
1255
1256 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n",
1257 *handle, initial_units));
1258
1259 return AE_OK;
1260 }
1261
1262 /*
1263 * TODO: A better way to delete semaphores? Linux doesn't have a
1264 * 'delete_semaphore()' function -- may result in an invalid
1265 * pointer dereference for non-synchronized consumers. Should
1266 * we at least check for blocked threads and signal/cancel them?
1267 */
1268
1269 acpi_status acpi_os_delete_semaphore(acpi_handle handle)
1270 {
1271 struct semaphore *sem = (struct semaphore *)handle;
1272
1273 if (!sem)
1274 return AE_BAD_PARAMETER;
1275
1276 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle));
1277
1278 BUG_ON(!list_empty(&sem->wait_list));
1279 kfree(sem);
1280 sem = NULL;
1281
1282 return AE_OK;
1283 }
1284
1285 /*
1286 * TODO: Support for units > 1?
1287 */
1288 acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout)
1289 {
1290 acpi_status status = AE_OK;
1291 struct semaphore *sem = (struct semaphore *)handle;
1292 long jiffies;
1293 int ret = 0;
1294
1295 if (!sem || (units < 1))
1296 return AE_BAD_PARAMETER;
1297
1298 if (units > 1)
1299 return AE_SUPPORT;
1300
1301 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n",
1302 handle, units, timeout));
1303
1304 if (timeout == ACPI_WAIT_FOREVER)
1305 jiffies = MAX_SCHEDULE_TIMEOUT;
1306 else
1307 jiffies = msecs_to_jiffies(timeout);
1308
1309 ret = down_timeout(sem, jiffies);
1310 if (ret)
1311 status = AE_TIME;
1312
1313 if (ACPI_FAILURE(status)) {
1314 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
1315 "Failed to acquire semaphore[%p|%d|%d], %s",
1316 handle, units, timeout,
1317 acpi_format_exception(status)));
1318 } else {
1319 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
1320 "Acquired semaphore[%p|%d|%d]", handle,
1321 units, timeout));
1322 }
1323
1324 return status;
1325 }
1326
1327 /*
1328 * TODO: Support for units > 1?
1329 */
1330 acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units)
1331 {
1332 struct semaphore *sem = (struct semaphore *)handle;
1333
1334 if (!sem || (units < 1))
1335 return AE_BAD_PARAMETER;
1336
1337 if (units > 1)
1338 return AE_SUPPORT;
1339
1340 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle,
1341 units));
1342
1343 up(sem);
1344
1345 return AE_OK;
1346 }
1347
1348 #ifdef ACPI_FUTURE_USAGE
1349 u32 acpi_os_get_line(char *buffer)
1350 {
1351
1352 #ifdef ENABLE_DEBUGGER
1353 if (acpi_in_debugger) {
1354 u32 chars;
1355
1356 kdb_read(buffer, sizeof(line_buf));
1357
1358 /* remove the CR kdb includes */
1359 chars = strlen(buffer) - 1;
1360 buffer[chars] = '\0';
1361 }
1362 #endif
1363
1364 return 0;
1365 }
1366 #endif /* ACPI_FUTURE_USAGE */
1367
1368 acpi_status acpi_os_signal(u32 function, void *info)
1369 {
1370 switch (function) {
1371 case ACPI_SIGNAL_FATAL:
1372 printk(KERN_ERR PREFIX "Fatal opcode executed\n");
1373 break;
1374 case ACPI_SIGNAL_BREAKPOINT:
1375 /*
1376 * AML Breakpoint
1377 * ACPI spec. says to treat it as a NOP unless
1378 * you are debugging. So if/when we integrate
1379 * AML debugger into the kernel debugger its
1380 * hook will go here. But until then it is
1381 * not useful to print anything on breakpoints.
1382 */
1383 break;
1384 default:
1385 break;
1386 }
1387
1388 return AE_OK;
1389 }
1390
1391 static int __init acpi_os_name_setup(char *str)
1392 {
1393 char *p = acpi_os_name;
1394 int count = ACPI_MAX_OVERRIDE_LEN - 1;
1395
1396 if (!str || !*str)
1397 return 0;
1398
1399 for (; count-- && *str; str++) {
1400 if (isalnum(*str) || *str == ' ' || *str == ':')
1401 *p++ = *str;
1402 else if (*str == '\'' || *str == '"')
1403 continue;
1404 else
1405 break;
1406 }
1407 *p = 0;
1408
1409 return 1;
1410
1411 }
1412
1413 __setup("acpi_os_name=", acpi_os_name_setup);
1414
1415 #define OSI_STRING_LENGTH_MAX 64 /* arbitrary */
1416 #define OSI_STRING_ENTRIES_MAX 16 /* arbitrary */
1417
1418 struct osi_setup_entry {
1419 char string[OSI_STRING_LENGTH_MAX];
1420 bool enable;
1421 };
1422
1423 static struct osi_setup_entry
1424 osi_setup_entries[OSI_STRING_ENTRIES_MAX] __initdata = {
1425 {"Module Device", true},
1426 {"Processor Device", true},
1427 {"3.0 _SCP Extensions", true},
1428 {"Processor Aggregator Device", true},
1429 };
1430
1431 void __init acpi_osi_setup(char *str)
1432 {
1433 struct osi_setup_entry *osi;
1434 bool enable = true;
1435 int i;
1436
1437 if (!acpi_gbl_create_osi_method)
1438 return;
1439
1440 if (str == NULL || *str == '\0') {
1441 printk(KERN_INFO PREFIX "_OSI method disabled\n");
1442 acpi_gbl_create_osi_method = FALSE;
1443 return;
1444 }
1445
1446 if (*str == '!') {
1447 str++;
1448 if (*str == '\0') {
1449 osi_linux.default_disabling = 1;
1450 return;
1451 } else if (*str == '*') {
1452 acpi_update_interfaces(ACPI_DISABLE_ALL_STRINGS);
1453 for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
1454 osi = &osi_setup_entries[i];
1455 osi->enable = false;
1456 }
1457 return;
1458 }
1459 enable = false;
1460 }
1461
1462 for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
1463 osi = &osi_setup_entries[i];
1464 if (!strcmp(osi->string, str)) {
1465 osi->enable = enable;
1466 break;
1467 } else if (osi->string[0] == '\0') {
1468 osi->enable = enable;
1469 strncpy(osi->string, str, OSI_STRING_LENGTH_MAX);
1470 break;
1471 }
1472 }
1473 }
1474
1475 static void __init set_osi_linux(unsigned int enable)
1476 {
1477 if (osi_linux.enable != enable)
1478 osi_linux.enable = enable;
1479
1480 if (osi_linux.enable)
1481 acpi_osi_setup("Linux");
1482 else
1483 acpi_osi_setup("!Linux");
1484
1485 return;
1486 }
1487
1488 static void __init acpi_cmdline_osi_linux(unsigned int enable)
1489 {
1490 osi_linux.cmdline = 1; /* cmdline set the default and override DMI */
1491 osi_linux.dmi = 0;
1492 set_osi_linux(enable);
1493
1494 return;
1495 }
1496
1497 void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d)
1498 {
1499 printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident);
1500
1501 if (enable == -1)
1502 return;
1503
1504 osi_linux.dmi = 1; /* DMI knows that this box asks OSI(Linux) */
1505 set_osi_linux(enable);
1506
1507 return;
1508 }
1509
1510 /*
1511 * Modify the list of "OS Interfaces" reported to BIOS via _OSI
1512 *
1513 * empty string disables _OSI
1514 * string starting with '!' disables that string
1515 * otherwise string is added to list, augmenting built-in strings
1516 */
1517 static void __init acpi_osi_setup_late(void)
1518 {
1519 struct osi_setup_entry *osi;
1520 char *str;
1521 int i;
1522 acpi_status status;
1523
1524 if (osi_linux.default_disabling) {
1525 status = acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS);
1526
1527 if (ACPI_SUCCESS(status))
1528 printk(KERN_INFO PREFIX "Disabled all _OSI OS vendors\n");
1529 }
1530
1531 for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
1532 osi = &osi_setup_entries[i];
1533 str = osi->string;
1534
1535 if (*str == '\0')
1536 break;
1537 if (osi->enable) {
1538 status = acpi_install_interface(str);
1539
1540 if (ACPI_SUCCESS(status))
1541 printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str);
1542 } else {
1543 status = acpi_remove_interface(str);
1544
1545 if (ACPI_SUCCESS(status))
1546 printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str);
1547 }
1548 }
1549 }
1550
1551 static int __init osi_setup(char *str)
1552 {
1553 if (str && !strcmp("Linux", str))
1554 acpi_cmdline_osi_linux(1);
1555 else if (str && !strcmp("!Linux", str))
1556 acpi_cmdline_osi_linux(0);
1557 else
1558 acpi_osi_setup(str);
1559
1560 return 1;
1561 }
1562
1563 __setup("acpi_osi=", osi_setup);
1564
1565 /*
1566 * Disable the auto-serialization of named objects creation methods.
1567 *
1568 * This feature is enabled by default. It marks the AML control methods
1569 * that contain the opcodes to create named objects as "Serialized".
1570 */
1571 static int __init acpi_no_auto_serialize_setup(char *str)
1572 {
1573 acpi_gbl_auto_serialize_methods = FALSE;
1574 pr_info("ACPI: auto-serialization disabled\n");
1575
1576 return 1;
1577 }
1578
1579 __setup("acpi_no_auto_serialize", acpi_no_auto_serialize_setup);
1580
1581 /* Check of resource interference between native drivers and ACPI
1582 * OperationRegions (SystemIO and System Memory only).
1583 * IO ports and memory declared in ACPI might be used by the ACPI subsystem
1584 * in arbitrary AML code and can interfere with legacy drivers.
1585 * acpi_enforce_resources= can be set to:
1586 *
1587 * - strict (default) (2)
1588 * -> further driver trying to access the resources will not load
1589 * - lax (1)
1590 * -> further driver trying to access the resources will load, but you
1591 * get a system message that something might go wrong...
1592 *
1593 * - no (0)
1594 * -> ACPI Operation Region resources will not be registered
1595 *
1596 */
1597 #define ENFORCE_RESOURCES_STRICT 2
1598 #define ENFORCE_RESOURCES_LAX 1
1599 #define ENFORCE_RESOURCES_NO 0
1600
1601 static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT;
1602
1603 static int __init acpi_enforce_resources_setup(char *str)
1604 {
1605 if (str == NULL || *str == '\0')
1606 return 0;
1607
1608 if (!strcmp("strict", str))
1609 acpi_enforce_resources = ENFORCE_RESOURCES_STRICT;
1610 else if (!strcmp("lax", str))
1611 acpi_enforce_resources = ENFORCE_RESOURCES_LAX;
1612 else if (!strcmp("no", str))
1613 acpi_enforce_resources = ENFORCE_RESOURCES_NO;
1614
1615 return 1;
1616 }
1617
1618 __setup("acpi_enforce_resources=", acpi_enforce_resources_setup);
1619
1620 /* Check for resource conflicts between ACPI OperationRegions and native
1621 * drivers */
1622 int acpi_check_resource_conflict(const struct resource *res)
1623 {
1624 acpi_adr_space_type space_id;
1625 acpi_size length;
1626 u8 warn = 0;
1627 int clash = 0;
1628
1629 if (acpi_enforce_resources == ENFORCE_RESOURCES_NO)
1630 return 0;
1631 if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM))
1632 return 0;
1633
1634 if (res->flags & IORESOURCE_IO)
1635 space_id = ACPI_ADR_SPACE_SYSTEM_IO;
1636 else
1637 space_id = ACPI_ADR_SPACE_SYSTEM_MEMORY;
1638
1639 length = resource_size(res);
1640 if (acpi_enforce_resources != ENFORCE_RESOURCES_NO)
1641 warn = 1;
1642 clash = acpi_check_address_range(space_id, res->start, length, warn);
1643
1644 if (clash) {
1645 if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) {
1646 if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX)
1647 printk(KERN_NOTICE "ACPI: This conflict may"
1648 " cause random problems and system"
1649 " instability\n");
1650 printk(KERN_INFO "ACPI: If an ACPI driver is available"
1651 " for this device, you should use it instead of"
1652 " the native driver\n");
1653 }
1654 if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT)
1655 return -EBUSY;
1656 }
1657 return 0;
1658 }
1659 EXPORT_SYMBOL(acpi_check_resource_conflict);
1660
1661 int acpi_check_region(resource_size_t start, resource_size_t n,
1662 const char *name)
1663 {
1664 struct resource res = {
1665 .start = start,
1666 .end = start + n - 1,
1667 .name = name,
1668 .flags = IORESOURCE_IO,
1669 };
1670
1671 return acpi_check_resource_conflict(&res);
1672 }
1673 EXPORT_SYMBOL(acpi_check_region);
1674
1675 /*
1676 * Let drivers know whether the resource checks are effective
1677 */
1678 int acpi_resources_are_enforced(void)
1679 {
1680 return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT;
1681 }
1682 EXPORT_SYMBOL(acpi_resources_are_enforced);
1683
1684 /*
1685 * Deallocate the memory for a spinlock.
1686 */
1687 void acpi_os_delete_lock(acpi_spinlock handle)
1688 {
1689 ACPI_FREE(handle);
1690 }
1691
1692 /*
1693 * Acquire a spinlock.
1694 *
1695 * handle is a pointer to the spinlock_t.
1696 */
1697
1698 acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp)
1699 {
1700 acpi_cpu_flags flags;
1701 spin_lock_irqsave(lockp, flags);
1702 return flags;
1703 }
1704
1705 /*
1706 * Release a spinlock. See above.
1707 */
1708
1709 void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags)
1710 {
1711 spin_unlock_irqrestore(lockp, flags);
1712 }
1713
1714 #ifndef ACPI_USE_LOCAL_CACHE
1715
1716 /*******************************************************************************
1717 *
1718 * FUNCTION: acpi_os_create_cache
1719 *
1720 * PARAMETERS: name - Ascii name for the cache
1721 * size - Size of each cached object
1722 * depth - Maximum depth of the cache (in objects) <ignored>
1723 * cache - Where the new cache object is returned
1724 *
1725 * RETURN: status
1726 *
1727 * DESCRIPTION: Create a cache object
1728 *
1729 ******************************************************************************/
1730
1731 acpi_status
1732 acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache)
1733 {
1734 *cache = kmem_cache_create(name, size, 0, 0, NULL);
1735 if (*cache == NULL)
1736 return AE_ERROR;
1737 else
1738 return AE_OK;
1739 }
1740
1741 /*******************************************************************************
1742 *
1743 * FUNCTION: acpi_os_purge_cache
1744 *
1745 * PARAMETERS: Cache - Handle to cache object
1746 *
1747 * RETURN: Status
1748 *
1749 * DESCRIPTION: Free all objects within the requested cache.
1750 *
1751 ******************************************************************************/
1752
1753 acpi_status acpi_os_purge_cache(acpi_cache_t * cache)
1754 {
1755 kmem_cache_shrink(cache);
1756 return (AE_OK);
1757 }
1758
1759 /*******************************************************************************
1760 *
1761 * FUNCTION: acpi_os_delete_cache
1762 *
1763 * PARAMETERS: Cache - Handle to cache object
1764 *
1765 * RETURN: Status
1766 *
1767 * DESCRIPTION: Free all objects within the requested cache and delete the
1768 * cache object.
1769 *
1770 ******************************************************************************/
1771
1772 acpi_status acpi_os_delete_cache(acpi_cache_t * cache)
1773 {
1774 kmem_cache_destroy(cache);
1775 return (AE_OK);
1776 }
1777
1778 /*******************************************************************************
1779 *
1780 * FUNCTION: acpi_os_release_object
1781 *
1782 * PARAMETERS: Cache - Handle to cache object
1783 * Object - The object to be released
1784 *
1785 * RETURN: None
1786 *
1787 * DESCRIPTION: Release an object to the specified cache. If cache is full,
1788 * the object is deleted.
1789 *
1790 ******************************************************************************/
1791
1792 acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object)
1793 {
1794 kmem_cache_free(cache, object);
1795 return (AE_OK);
1796 }
1797 #endif
1798
1799 static int __init acpi_no_static_ssdt_setup(char *s)
1800 {
1801 acpi_gbl_disable_ssdt_table_install = TRUE;
1802 pr_info("ACPI: static SSDT installation disabled\n");
1803
1804 return 0;
1805 }
1806
1807 early_param("acpi_no_static_ssdt", acpi_no_static_ssdt_setup);
1808
1809 static int __init acpi_disable_return_repair(char *s)
1810 {
1811 printk(KERN_NOTICE PREFIX
1812 "ACPI: Predefined validation mechanism disabled\n");
1813 acpi_gbl_disable_auto_repair = TRUE;
1814
1815 return 1;
1816 }
1817
1818 __setup("acpica_no_return_repair", acpi_disable_return_repair);
1819
1820 acpi_status __init acpi_os_initialize(void)
1821 {
1822 acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block);
1823 acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block);
1824 acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block);
1825 acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block);
1826 if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) {
1827 /*
1828 * Use acpi_os_map_generic_address to pre-map the reset
1829 * register if it's in system memory.
1830 */
1831 int rv;
1832
1833 rv = acpi_os_map_generic_address(&acpi_gbl_FADT.reset_register);
1834 pr_debug(PREFIX "%s: map reset_reg status %d\n", __func__, rv);
1835 }
1836
1837 return AE_OK;
1838 }
1839
1840 acpi_status __init acpi_os_initialize1(void)
1841 {
1842 kacpid_wq = alloc_workqueue("kacpid", 0, 1);
1843 kacpi_notify_wq = alloc_workqueue("kacpi_notify", 0, 1);
1844 kacpi_hotplug_wq = alloc_ordered_workqueue("kacpi_hotplug", 0);
1845 BUG_ON(!kacpid_wq);
1846 BUG_ON(!kacpi_notify_wq);
1847 BUG_ON(!kacpi_hotplug_wq);
1848 acpi_install_interface_handler(acpi_osi_handler);
1849 acpi_osi_setup_late();
1850 return AE_OK;
1851 }
1852
1853 acpi_status acpi_os_terminate(void)
1854 {
1855 if (acpi_irq_handler) {
1856 acpi_os_remove_interrupt_handler(acpi_gbl_FADT.sci_interrupt,
1857 acpi_irq_handler);
1858 }
1859
1860 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe1_block);
1861 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block);
1862 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block);
1863 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block);
1864 if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER)
1865 acpi_os_unmap_generic_address(&acpi_gbl_FADT.reset_register);
1866
1867 destroy_workqueue(kacpid_wq);
1868 destroy_workqueue(kacpi_notify_wq);
1869 destroy_workqueue(kacpi_hotplug_wq);
1870
1871 return AE_OK;
1872 }
1873
1874 acpi_status acpi_os_prepare_sleep(u8 sleep_state, u32 pm1a_control,
1875 u32 pm1b_control)
1876 {
1877 int rc = 0;
1878 if (__acpi_os_prepare_sleep)
1879 rc = __acpi_os_prepare_sleep(sleep_state,
1880 pm1a_control, pm1b_control);
1881 if (rc < 0)
1882 return AE_ERROR;
1883 else if (rc > 0)
1884 return AE_CTRL_SKIP;
1885
1886 return AE_OK;
1887 }
1888
1889 void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state,
1890 u32 pm1a_ctrl, u32 pm1b_ctrl))
1891 {
1892 __acpi_os_prepare_sleep = func;
1893 }
1894
1895 acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state, u32 val_a,
1896 u32 val_b)
1897 {
1898 int rc = 0;
1899 if (__acpi_os_prepare_extended_sleep)
1900 rc = __acpi_os_prepare_extended_sleep(sleep_state,
1901 val_a, val_b);
1902 if (rc < 0)
1903 return AE_ERROR;
1904 else if (rc > 0)
1905 return AE_CTRL_SKIP;
1906
1907 return AE_OK;
1908 }
1909
1910 void acpi_os_set_prepare_extended_sleep(int (*func)(u8 sleep_state,
1911 u32 val_a, u32 val_b))
1912 {
1913 __acpi_os_prepare_extended_sleep = func;
1914 }
Linux kernel - Deliverables
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