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Linus Torvalds1da177e2005-04-16 15:20:36 -07001/*
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>
Matthew Wilcoxf1241c82008-03-14 13:43:13 -04007 * Copyright (c) 2008 Intel Corporation
8 * Author: Matthew Wilcox <willy@linux.intel.com>
Linus Torvalds1da177e2005-04-16 15:20:36 -07009 *
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
Linus Torvalds1da177e2005-04-16 15:20:36 -070030#include <linux/module.h>
31#include <linux/kernel.h>
32#include <linux/slab.h>
33#include <linux/mm.h>
Myron Stoweba242d52012-01-20 19:13:30 -070034#include <linux/highmem.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070035#include <linux/pci.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070036#include <linux/interrupt.h>
37#include <linux/kmod.h>
38#include <linux/delay.h>
39#include <linux/workqueue.h>
40#include <linux/nmi.h>
Alexey Starikovskiyad71860a2007-02-02 19:48:19 +030041#include <linux/acpi.h>
Linus Torvalds1da177e2005-04-16 15:20:36 -070042#include <linux/efi.h>
Thomas Renningerdf92e692008-02-04 23:31:22 -080043#include <linux/ioport.h>
44#include <linux/list.h>
Matthew Wilcoxf1241c82008-03-14 13:43:13 -040045#include <linux/jiffies.h>
46#include <linux/semaphore.h>
47
48#include <asm/io.h>
49#include <asm/uaccess.h>
50
Lv Zheng1129c922013-07-23 16:11:55 +080051#include "internal.h"
Linus Torvalds1da177e2005-04-16 15:20:36 -070052
Linus Torvalds1da177e2005-04-16 15:20:36 -070053#define _COMPONENT ACPI_OS_SERVICES
Len Brownf52fd662007-02-12 22:42:12 -050054ACPI_MODULE_NAME("osl");
Hanjun Guo07070e12014-03-13 12:47:39 +080055
Len Brown4be44fc2005-08-05 00:44:28 -040056struct acpi_os_dpc {
57 acpi_osd_exec_callback function;
58 void *context;
David Howells65f27f32006-11-22 14:55:48 +000059 struct work_struct work;
Linus Torvalds1da177e2005-04-16 15:20:36 -070060};
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 */
70int acpi_in_debugger;
71EXPORT_SYMBOL(acpi_in_debugger);
72
73extern char line_buf[80];
Len Brown4be44fc2005-08-05 00:44:28 -040074#endif /*ENABLE_DEBUGGER */
Linus Torvalds1da177e2005-04-16 15:20:36 -070075
Tang Liang09f98a82011-12-09 10:05:54 +080076static int (*__acpi_os_prepare_sleep)(u8 sleep_state, u32 pm1a_ctrl,
77 u32 pm1b_ctrl);
Ben Guthrod6b47b12013-07-30 08:24:52 -040078static int (*__acpi_os_prepare_extended_sleep)(u8 sleep_state, u32 val_a,
79 u32 val_b);
Tang Liang09f98a82011-12-09 10:05:54 +080080
Linus Torvalds1da177e2005-04-16 15:20:36 -070081static acpi_osd_handler acpi_irq_handler;
82static void *acpi_irq_context;
83static struct workqueue_struct *kacpid_wq;
Alexey Starikovskiy88db5e12007-05-09 23:31:03 -040084static struct workqueue_struct *kacpi_notify_wq;
Yinghai Lu92d8aff2013-01-21 13:20:47 -080085static struct workqueue_struct *kacpi_hotplug_wq;
Linus Torvalds1da177e2005-04-16 15:20:36 -070086
Myron Stowe620242a2010-10-21 14:23:53 -060087/*
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 */
91struct acpi_ioremap {
92 struct list_head list;
93 void __iomem *virt;
94 acpi_physical_address phys;
95 acpi_size size;
Rafael J. Wysockib7c1fad2011-02-08 23:38:15 +010096 unsigned long refcount;
Myron Stowe620242a2010-10-21 14:23:53 -060097};
98
99static LIST_HEAD(acpi_ioremaps);
Rafael J. Wysocki7bbb8902011-02-08 23:37:42 +0100100static DEFINE_MUTEX(acpi_ioremap_lock);
Myron Stowe620242a2010-10-21 14:23:53 -0600101
Lin Mingb0ed7a92010-08-06 09:35:51 +0800102static void __init acpi_osi_setup_late(void);
Len Brownae00d812007-05-29 18:43:33 -0400103
Len Brownd4b7dc42008-01-23 20:50:56 -0500104/*
Len Browna6e08872008-11-08 01:21:10 -0500105 * The story of _OSI(Linux)
Len Brownd4b7dc42008-01-23 20:50:56 -0500106 *
Len Browna6e08872008-11-08 01:21:10 -0500107 * From pre-history through Linux-2.6.22,
108 * Linux responded TRUE upon a BIOS OSI(Linux) query.
Len Brownd4b7dc42008-01-23 20:50:56 -0500109 *
Len Browna6e08872008-11-08 01:21:10 -0500110 * 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.
Len Brownd4b7dc42008-01-23 20:50:56 -0500114 *
Len Browna6e08872008-11-08 01:21:10 -0500115 * 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.
Len Brownd4b7dc42008-01-23 20:50:56 -0500126 *
Len Browna6e08872008-11-08 01:21:10 -0500127 * So "Linux" turned out to be a really poor chose of
128 * OSI string, and from Linux-2.6.23 onward we respond FALSE.
Len Brownd4b7dc42008-01-23 20:50:56 -0500129 *
130 * BIOS writers should NOT query _OSI(Linux) on future systems.
Len Browna6e08872008-11-08 01:21:10 -0500131 * 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"
Len Brownd4b7dc42008-01-23 20:50:56 -0500135 */
Len Brownd4b7dc42008-01-23 20:50:56 -0500136
Adrian Bunk1d15d842008-01-29 00:10:15 +0200137static struct osi_linux {
Len Brownd4b7dc42008-01-23 20:50:56 -0500138 unsigned int enable:1;
139 unsigned int dmi:1;
140 unsigned int cmdline:1;
Lv Zheng5dc17982013-07-22 16:08:25 +0800141 unsigned int default_disabling:1;
142} osi_linux = {0, 0, 0, 0};
Len Brownf5076542007-05-30 00:10:38 -0400143
Lin Mingb0ed7a92010-08-06 09:35:51 +0800144static u32 acpi_osi_handler(acpi_string interface, u32 supported)
145{
146 if (!strcmp("Linux", interface)) {
147
Len Brown89976212011-08-02 00:45:48 -0400148 printk_once(KERN_NOTICE FW_BUG PREFIX
Lin Mingb0ed7a92010-08-06 09:35:51 +0800149 "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
Matthew Garrett7bc5a2b2014-09-20 13:19:47 +0200155 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
Lin Mingb0ed7a92010-08-06 09:35:51 +0800165 return supported;
166}
167
Myron Stowebc9ffce2011-11-07 16:23:27 -0700168static void __init acpi_request_region (struct acpi_generic_address *gas,
Bjorn Helgaas9a47cdb2007-01-18 16:42:55 -0700169 unsigned int length, char *desc)
170{
Myron Stowebc9ffce2011-11-07 16:23:27 -0700171 u64 addr;
172
173 /* Handle possible alignment issues */
174 memcpy(&addr, &gas->address, sizeof(addr));
175 if (!addr || !length)
Bjorn Helgaas9a47cdb2007-01-18 16:42:55 -0700176 return;
177
Andi Kleencfa806f2010-07-20 15:18:36 -0700178 /* Resources are never freed */
Myron Stowebc9ffce2011-11-07 16:23:27 -0700179 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);
Bjorn Helgaas9a47cdb2007-01-18 16:42:55 -0700183}
184
185static int __init acpi_reserve_resources(void)
186{
Len Browneee3c852007-02-03 01:38:16 -0500187 acpi_request_region(&acpi_gbl_FADT.xpm1a_event_block, acpi_gbl_FADT.pm1_event_length,
Bjorn Helgaas9a47cdb2007-01-18 16:42:55 -0700188 "ACPI PM1a_EVT_BLK");
189
Len Browneee3c852007-02-03 01:38:16 -0500190 acpi_request_region(&acpi_gbl_FADT.xpm1b_event_block, acpi_gbl_FADT.pm1_event_length,
Bjorn Helgaas9a47cdb2007-01-18 16:42:55 -0700191 "ACPI PM1b_EVT_BLK");
192
Len Browneee3c852007-02-03 01:38:16 -0500193 acpi_request_region(&acpi_gbl_FADT.xpm1a_control_block, acpi_gbl_FADT.pm1_control_length,
Bjorn Helgaas9a47cdb2007-01-18 16:42:55 -0700194 "ACPI PM1a_CNT_BLK");
195
Len Browneee3c852007-02-03 01:38:16 -0500196 acpi_request_region(&acpi_gbl_FADT.xpm1b_control_block, acpi_gbl_FADT.pm1_control_length,
Bjorn Helgaas9a47cdb2007-01-18 16:42:55 -0700197 "ACPI PM1b_CNT_BLK");
198
Len Browneee3c852007-02-03 01:38:16 -0500199 if (acpi_gbl_FADT.pm_timer_length == 4)
200 acpi_request_region(&acpi_gbl_FADT.xpm_timer_block, 4, "ACPI PM_TMR");
Bjorn Helgaas9a47cdb2007-01-18 16:42:55 -0700201
Len Browneee3c852007-02-03 01:38:16 -0500202 acpi_request_region(&acpi_gbl_FADT.xpm2_control_block, acpi_gbl_FADT.pm2_control_length,
Bjorn Helgaas9a47cdb2007-01-18 16:42:55 -0700203 "ACPI PM2_CNT_BLK");
204
205 /* Length of GPE blocks must be a non-negative multiple of 2 */
206
Len Browneee3c852007-02-03 01:38:16 -0500207 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");
Bjorn Helgaas9a47cdb2007-01-18 16:42:55 -0700210
Len Browneee3c852007-02-03 01:38:16 -0500211 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");
Bjorn Helgaas9a47cdb2007-01-18 16:42:55 -0700214
215 return 0;
216}
217device_initcall(acpi_reserve_resources);
218
Len Brown4be44fc2005-08-05 00:44:28 -0400219void acpi_os_printf(const char *fmt, ...)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700220{
221 va_list args;
222 va_start(args, fmt);
223 acpi_os_vprintf(fmt, args);
224 va_end(args);
225}
Len Brown4be44fc2005-08-05 00:44:28 -0400226
Len Brown4be44fc2005-08-05 00:44:28 -0400227void acpi_os_vprintf(const char *fmt, va_list args)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700228{
229 static char buffer[512];
Len Brown4be44fc2005-08-05 00:44:28 -0400230
Linus Torvalds1da177e2005-04-16 15:20:36 -0700231 vsprintf(buffer, fmt, args);
232
233#ifdef ENABLE_DEBUGGER
234 if (acpi_in_debugger) {
235 kdb_printf("%s", buffer);
236 } else {
Frank Seidel4d939152009-02-04 17:03:07 +0100237 printk(KERN_CONT "%s", buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700238 }
239#else
Frank Seidel4d939152009-02-04 17:03:07 +0100240 printk(KERN_CONT "%s", buffer);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700241#endif
242}
243
Takao Indoh4996c022011-07-14 18:05:21 -0400244#ifdef CONFIG_KEXEC
245static unsigned long acpi_rsdp;
246static int __init setup_acpi_rsdp(char *arg)
247{
Christoph Jaeger3d915892014-06-13 21:49:58 +0200248 if (kstrtoul(arg, 16, &acpi_rsdp))
249 return -EINVAL;
Takao Indoh4996c022011-07-14 18:05:21 -0400250 return 0;
251}
252early_param("acpi_rsdp", setup_acpi_rsdp);
253#endif
254
Alexey Starikovskiyad71860a2007-02-02 19:48:19 +0300255acpi_physical_address __init acpi_os_get_root_pointer(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700256{
Takao Indoh4996c022011-07-14 18:05:21 -0400257#ifdef CONFIG_KEXEC
258 if (acpi_rsdp)
259 return acpi_rsdp;
260#endif
261
Matt Fleming83e68182012-11-14 09:42:35 +0000262 if (efi_enabled(EFI_CONFIG_TABLES)) {
Bjorn Helgaasb2c99e32006-03-26 01:37:08 -0800263 if (efi.acpi20 != EFI_INVALID_TABLE_ADDR)
Alexey Starikovskiyad71860a2007-02-02 19:48:19 +0300264 return efi.acpi20;
Bjorn Helgaasb2c99e32006-03-26 01:37:08 -0800265 else if (efi.acpi != EFI_INVALID_TABLE_ADDR)
Alexey Starikovskiyad71860a2007-02-02 19:48:19 +0300266 return efi.acpi;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700267 else {
Len Brown4be44fc2005-08-05 00:44:28 -0400268 printk(KERN_ERR PREFIX
269 "System description tables not found\n");
Alexey Starikovskiyad71860a2007-02-02 19:48:19 +0300270 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700271 }
Graeme Gregory8a1664b2014-07-18 18:02:52 +0800272 } else if (IS_ENABLED(CONFIG_ACPI_LEGACY_TABLES_LOOKUP)) {
Len Brown239665a2007-11-23 20:08:02 -0500273 acpi_physical_address pa = 0;
274
275 acpi_find_root_pointer(&pa);
276 return pa;
277 }
Graeme Gregory8a1664b2014-07-18 18:02:52 +0800278
279 return 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700280}
281
Myron Stowe78cdb3e2010-10-21 14:24:09 -0600282/* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
Myron Stowe4a3cba52010-10-21 14:24:14 -0600283static struct acpi_ioremap *
284acpi_map_lookup(acpi_physical_address phys, acpi_size size)
Myron Stowe620242a2010-10-21 14:23:53 -0600285{
286 struct acpi_ioremap *map;
287
Myron Stowe78cdb3e2010-10-21 14:24:09 -0600288 list_for_each_entry_rcu(map, &acpi_ioremaps, list)
Myron Stowe620242a2010-10-21 14:23:53 -0600289 if (map->phys <= phys &&
290 phys + size <= map->phys + map->size)
Myron Stowe4a3cba52010-10-21 14:24:14 -0600291 return map;
292
293 return NULL;
294}
295
296/* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
297static void __iomem *
298acpi_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);
Myron Stowe620242a2010-10-21 14:23:53 -0600305
306 return NULL;
307}
308
Rafael J. Wysocki13606a22011-02-08 23:38:25 +0100309void __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}
323EXPORT_SYMBOL_GPL(acpi_os_get_iomem);
324
Myron Stowe78cdb3e2010-10-21 14:24:09 -0600325/* Must be called with 'acpi_ioremap_lock' or RCU read lock held. */
Myron Stowe620242a2010-10-21 14:23:53 -0600326static struct acpi_ioremap *
327acpi_map_lookup_virt(void __iomem *virt, acpi_size size)
328{
329 struct acpi_ioremap *map;
330
Myron Stowe78cdb3e2010-10-21 14:24:09 -0600331 list_for_each_entry_rcu(map, &acpi_ioremaps, list)
Myron Stowe4a3cba52010-10-21 14:24:14 -0600332 if (map->virt <= virt &&
333 virt + size <= map->virt + map->size)
Myron Stowe620242a2010-10-21 14:23:53 -0600334 return map;
335
336 return NULL;
337}
338
Myron Stoweba242d52012-01-20 19:13:30 -0700339#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
346static 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
359static void acpi_unmap(acpi_physical_address pg_off, void __iomem *vaddr)
360{
361 unsigned long pfn;
362
363 pfn = pg_off >> PAGE_SHIFT;
Jan Beuliche2526752012-02-24 11:41:53 +0000364 if (should_use_kmap(pfn))
Myron Stoweba242d52012-01-20 19:13:30 -0700365 kunmap(pfn_to_page(pfn));
366 else
367 iounmap(vaddr);
368}
369
Jan Beulich2fdf0742007-12-13 08:33:59 +0000370void __iomem *__init_refok
Lv Zhenga2383172014-05-20 15:39:41 +0800371acpi_os_map_iomem(acpi_physical_address phys, acpi_size size)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700372{
Rafael J. Wysocki7ffd0442011-02-08 23:38:05 +0100373 struct acpi_ioremap *map;
Myron Stowe620242a2010-10-21 14:23:53 -0600374 void __iomem *virt;
Rafael J. Wysocki2d6d9fd2011-01-19 22:27:14 +0100375 acpi_physical_address pg_off;
376 acpi_size pg_sz;
Myron Stowe620242a2010-10-21 14:23:53 -0600377
Bjorn Helgaas9f4fd612006-03-26 01:37:10 -0800378 if (phys > ULONG_MAX) {
379 printk(KERN_ERR PREFIX "Cannot map memory that high\n");
Randy Dunlap70c08462007-02-13 16:11:36 -0800380 return NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700381 }
Myron Stowe620242a2010-10-21 14:23:53 -0600382
383 if (!acpi_gbl_permanent_mmap)
Alexey Starikovskiyad71860a2007-02-02 19:48:19 +0300384 return __acpi_map_table((unsigned long)phys, size);
Myron Stowe620242a2010-10-21 14:23:53 -0600385
Rafael J. Wysocki7ffd0442011-02-08 23:38:05 +0100386 mutex_lock(&acpi_ioremap_lock);
387 /* Check if there's a suitable mapping already. */
388 map = acpi_map_lookup(phys, size);
389 if (map) {
Rafael J. Wysockib7c1fad2011-02-08 23:38:15 +0100390 map->refcount++;
Rafael J. Wysocki7ffd0442011-02-08 23:38:05 +0100391 goto out;
392 }
393
Myron Stowe620242a2010-10-21 14:23:53 -0600394 map = kzalloc(sizeof(*map), GFP_KERNEL);
Rafael J. Wysocki7ffd0442011-02-08 23:38:05 +0100395 if (!map) {
396 mutex_unlock(&acpi_ioremap_lock);
Myron Stowe620242a2010-10-21 14:23:53 -0600397 return NULL;
Rafael J. Wysocki7ffd0442011-02-08 23:38:05 +0100398 }
Myron Stowe620242a2010-10-21 14:23:53 -0600399
Myron Stowe4a3cba52010-10-21 14:24:14 -0600400 pg_off = round_down(phys, PAGE_SIZE);
401 pg_sz = round_up(phys + size, PAGE_SIZE) - pg_off;
Myron Stoweba242d52012-01-20 19:13:30 -0700402 virt = acpi_map(pg_off, pg_sz);
Myron Stowe620242a2010-10-21 14:23:53 -0600403 if (!virt) {
Rafael J. Wysocki7ffd0442011-02-08 23:38:05 +0100404 mutex_unlock(&acpi_ioremap_lock);
Myron Stowe620242a2010-10-21 14:23:53 -0600405 kfree(map);
406 return NULL;
407 }
408
409 INIT_LIST_HEAD(&map->list);
410 map->virt = virt;
Myron Stowe4a3cba52010-10-21 14:24:14 -0600411 map->phys = pg_off;
412 map->size = pg_sz;
Rafael J. Wysockib7c1fad2011-02-08 23:38:15 +0100413 map->refcount = 1;
Myron Stowe620242a2010-10-21 14:23:53 -0600414
Myron Stowe78cdb3e2010-10-21 14:24:09 -0600415 list_add_tail_rcu(&map->list, &acpi_ioremaps);
Myron Stowe620242a2010-10-21 14:23:53 -0600416
Lv Zhenga2383172014-05-20 15:39:41 +0800417out:
Rafael J. Wysocki7ffd0442011-02-08 23:38:05 +0100418 mutex_unlock(&acpi_ioremap_lock);
Myron Stowe4a3cba52010-10-21 14:24:14 -0600419 return map->virt + (phys - map->phys);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700420}
Lv Zhenga2383172014-05-20 15:39:41 +0800421EXPORT_SYMBOL_GPL(acpi_os_map_iomem);
422
423void *__init_refok
424acpi_os_map_memory(acpi_physical_address phys, acpi_size size)
425{
426 return (void *)acpi_os_map_iomem(phys, size);
427}
Kylene Jo Hall55a82ab2006-01-08 01:03:15 -0800428EXPORT_SYMBOL_GPL(acpi_os_map_memory);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700429
Rafael J. Wysockib7c1fad2011-02-08 23:38:15 +0100430static void acpi_os_drop_map_ref(struct acpi_ioremap *map)
Myron Stowe4a3cba52010-10-21 14:24:14 -0600431{
Rafael J. Wysockib7c1fad2011-02-08 23:38:15 +0100432 if (!--map->refcount)
433 list_del_rcu(&map->list);
Myron Stowe4a3cba52010-10-21 14:24:14 -0600434}
Myron Stowe4a3cba52010-10-21 14:24:14 -0600435
Rafael J. Wysockib7c1fad2011-02-08 23:38:15 +0100436static void acpi_os_map_cleanup(struct acpi_ioremap *map)
Rafael J. Wysocki7fe135d2011-02-08 23:37:53 +0100437{
Rafael J. Wysockib7c1fad2011-02-08 23:38:15 +0100438 if (!map->refcount) {
Konstantin Khlebnikov74b51ee2014-11-09 13:53:37 +0400439 synchronize_rcu_expedited();
Myron Stoweba242d52012-01-20 19:13:30 -0700440 acpi_unmap(map->phys, map->virt);
Rafael J. Wysockib7c1fad2011-02-08 23:38:15 +0100441 kfree(map);
442 }
Myron Stowe4a3cba52010-10-21 14:24:14 -0600443}
444
Lv Zhenga2383172014-05-20 15:39:41 +0800445void __ref acpi_os_unmap_iomem(void __iomem *virt, acpi_size size)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700446{
Myron Stowe620242a2010-10-21 14:23:53 -0600447 struct acpi_ioremap *map;
Myron Stowe620242a2010-10-21 14:23:53 -0600448
449 if (!acpi_gbl_permanent_mmap) {
Yinghai Lu7d972772009-02-07 15:39:41 -0800450 __acpi_unmap_table(virt, size);
Myron Stowe620242a2010-10-21 14:23:53 -0600451 return;
452 }
453
Rafael J. Wysocki7bbb8902011-02-08 23:37:42 +0100454 mutex_lock(&acpi_ioremap_lock);
Myron Stowe620242a2010-10-21 14:23:53 -0600455 map = acpi_map_lookup_virt(virt, size);
456 if (!map) {
Rafael J. Wysocki7bbb8902011-02-08 23:37:42 +0100457 mutex_unlock(&acpi_ioremap_lock);
Rafael J. Wysocki7fe135d2011-02-08 23:37:53 +0100458 WARN(true, PREFIX "%s: bad address %p\n", __func__, virt);
Myron Stowe620242a2010-10-21 14:23:53 -0600459 return;
460 }
Rafael J. Wysockib7c1fad2011-02-08 23:38:15 +0100461 acpi_os_drop_map_ref(map);
Rafael J. Wysocki7bbb8902011-02-08 23:37:42 +0100462 mutex_unlock(&acpi_ioremap_lock);
Myron Stowe620242a2010-10-21 14:23:53 -0600463
Rafael J. Wysockib7c1fad2011-02-08 23:38:15 +0100464 acpi_os_map_cleanup(map);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700465}
Lv Zhenga2383172014-05-20 15:39:41 +0800466EXPORT_SYMBOL_GPL(acpi_os_unmap_iomem);
467
468void __ref acpi_os_unmap_memory(void *virt, acpi_size size)
469{
470 return acpi_os_unmap_iomem((void __iomem *)virt, size);
471}
Kylene Jo Hall55a82ab2006-01-08 01:03:15 -0800472EXPORT_SYMBOL_GPL(acpi_os_unmap_memory);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700473
Jeremy Fitzhardinge0d3a9cf2009-02-22 14:58:56 -0800474void __init early_acpi_os_unmap_memory(void __iomem *virt, acpi_size size)
Yinghai Lu7d972772009-02-07 15:39:41 -0800475{
476 if (!acpi_gbl_permanent_mmap)
477 __acpi_unmap_table(virt, size);
478}
479
Myron Stowe6f68c912011-11-07 16:23:34 -0700480int acpi_os_map_generic_address(struct acpi_generic_address *gas)
Myron Stowe29718522010-10-21 14:23:59 -0600481{
Myron Stowebc9ffce2011-11-07 16:23:27 -0700482 u64 addr;
Myron Stowe29718522010-10-21 14:23:59 -0600483 void __iomem *virt;
484
Myron Stowebc9ffce2011-11-07 16:23:27 -0700485 if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
Myron Stowe29718522010-10-21 14:23:59 -0600486 return 0;
487
Myron Stowebc9ffce2011-11-07 16:23:27 -0700488 /* Handle possible alignment issues */
489 memcpy(&addr, &gas->address, sizeof(addr));
490 if (!addr || !gas->bit_width)
Myron Stowe29718522010-10-21 14:23:59 -0600491 return -EINVAL;
492
Lv Zhenga2383172014-05-20 15:39:41 +0800493 virt = acpi_os_map_iomem(addr, gas->bit_width / 8);
Myron Stowe29718522010-10-21 14:23:59 -0600494 if (!virt)
495 return -EIO;
496
497 return 0;
498}
Myron Stowe6f68c912011-11-07 16:23:34 -0700499EXPORT_SYMBOL(acpi_os_map_generic_address);
Myron Stowe29718522010-10-21 14:23:59 -0600500
Myron Stowe6f68c912011-11-07 16:23:34 -0700501void acpi_os_unmap_generic_address(struct acpi_generic_address *gas)
Myron Stowe29718522010-10-21 14:23:59 -0600502{
Myron Stowebc9ffce2011-11-07 16:23:27 -0700503 u64 addr;
Rafael J. Wysocki7fe135d2011-02-08 23:37:53 +0100504 struct acpi_ioremap *map;
Myron Stowe29718522010-10-21 14:23:59 -0600505
Myron Stowebc9ffce2011-11-07 16:23:27 -0700506 if (gas->space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY)
Myron Stowe29718522010-10-21 14:23:59 -0600507 return;
508
Myron Stowebc9ffce2011-11-07 16:23:27 -0700509 /* Handle possible alignment issues */
510 memcpy(&addr, &gas->address, sizeof(addr));
511 if (!addr || !gas->bit_width)
Myron Stowe29718522010-10-21 14:23:59 -0600512 return;
513
Rafael J. Wysocki7bbb8902011-02-08 23:37:42 +0100514 mutex_lock(&acpi_ioremap_lock);
Myron Stowebc9ffce2011-11-07 16:23:27 -0700515 map = acpi_map_lookup(addr, gas->bit_width / 8);
Rafael J. Wysocki7fe135d2011-02-08 23:37:53 +0100516 if (!map) {
517 mutex_unlock(&acpi_ioremap_lock);
518 return;
519 }
Rafael J. Wysockib7c1fad2011-02-08 23:38:15 +0100520 acpi_os_drop_map_ref(map);
Rafael J. Wysocki7bbb8902011-02-08 23:37:42 +0100521 mutex_unlock(&acpi_ioremap_lock);
Myron Stowe29718522010-10-21 14:23:59 -0600522
Rafael J. Wysockib7c1fad2011-02-08 23:38:15 +0100523 acpi_os_map_cleanup(map);
Myron Stowe29718522010-10-21 14:23:59 -0600524}
Myron Stowe6f68c912011-11-07 16:23:34 -0700525EXPORT_SYMBOL(acpi_os_unmap_generic_address);
Myron Stowe29718522010-10-21 14:23:59 -0600526
Linus Torvalds1da177e2005-04-16 15:20:36 -0700527#ifdef ACPI_FUTURE_USAGE
528acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -0400529acpi_os_get_physical_address(void *virt, acpi_physical_address * phys)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700530{
Len Brown4be44fc2005-08-05 00:44:28 -0400531 if (!phys || !virt)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700532 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
542static char acpi_os_name[ACPI_MAX_OVERRIDE_LEN];
543
544acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -0400545acpi_os_predefined_override(const struct acpi_predefined_names *init_val,
546 acpi_string * new_val)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700547{
548 if (!init_val || !new_val)
549 return AE_BAD_PARAMETER;
550
551 *new_val = NULL;
Len Brown4be44fc2005-08-05 00:44:28 -0400552 if (!memcmp(init_val->name, "_OS_", 4) && strlen(acpi_os_name)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700553 printk(KERN_INFO PREFIX "Overriding _OS definition to '%s'\n",
Len Brown4be44fc2005-08-05 00:44:28 -0400554 acpi_os_name);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700555 *new_val = acpi_os_name;
556 }
557
558 return AE_OK;
559}
560
Thomas Renninger53aac442012-10-01 00:23:54 +0200561#ifdef CONFIG_ACPI_INITRD_TABLE_OVERRIDE
562#include <linux/earlycpio.h>
563#include <linux/memblock.h>
564
565static u64 acpi_tables_addr;
566static int all_tables_size;
567
568/* Copied from acpica/tbutils.c:acpi_tb_checksum() */
Rashika66e162b2013-12-17 14:43:05 +0530569static u8 __init acpi_table_checksum(u8 *buffer, u32 length)
Thomas Renninger53aac442012-10-01 00:23:54 +0200570{
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: */
580static 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
Thomas Renninger53aac442012-10-01 00:23:54 +0200591#define ACPI_HEADER_SIZE sizeof(struct acpi_table_header)
592
Yinghai Lubee7f9c2013-09-06 19:08:00 -0700593#define ACPI_OVERRIDE_TABLES 64
594static struct cpio_data __initdata acpi_initrd_files[ACPI_OVERRIDE_TABLES];
595
596#define MAP_CHUNK_SIZE (NR_FIX_BTMAPS << PAGE_SHIFT)
Thomas Renninger53aac442012-10-01 00:23:54 +0200597
598void __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;
Thomas Renninger53aac442012-10-01 00:23:54 +0200605
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
Tang Chen7702ae02013-08-14 17:37:08 +0800617 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 }
Thomas Renninger53aac442012-10-01 00:23:54 +0200622
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
Tang Chen7702ae02013-08-14 17:37:08 +0800629 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 }
Thomas Renninger53aac442012-10-01 00:23:54 +0200644
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;
Yinghai Lubee7f9c2013-09-06 19:08:00 -0700649 acpi_initrd_files[table_nr].data = file.data;
650 acpi_initrd_files[table_nr].size = file.size;
Thomas Renninger53aac442012-10-01 00:23:54 +0200651 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 */
Wang YanQinga6432de2013-04-23 01:19:19 +0200673 memblock_reserve(acpi_tables_addr, all_tables_size);
Thomas Renninger53aac442012-10-01 00:23:54 +0200674 arch_reserve_mem_area(acpi_tables_addr, all_tables_size);
675
Yinghai Lubee7f9c2013-09-06 19:08:00 -0700676 /*
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 */
Thomas Renninger53aac442012-10-01 00:23:54 +0200681 for (no = 0; no < table_nr; no++) {
Yinghai Lubee7f9c2013-09-06 19:08:00 -0700682 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 }
Thomas Renninger53aac442012-10-01 00:23:54 +0200703 }
Thomas Renninger53aac442012-10-01 00:23:54 +0200704}
705#endif /* CONFIG_ACPI_INITRD_TABLE_OVERRIDE */
706
Thomas Renninger325a8d362012-10-01 00:23:56 +0200707static 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);
Rusty Russell373d4d02013-01-21 17:17:39 +1030712 add_taint(TAINT_OVERRIDDEN_ACPI_TABLE, LOCKDEP_NOW_UNRELIABLE);
Thomas Renninger325a8d362012-10-01 00:23:56 +0200713}
714
715
Linus Torvalds1da177e2005-04-16 15:20:36 -0700716acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -0400717acpi_os_table_override(struct acpi_table_header * existing_table,
718 struct acpi_table_header ** new_table)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700719{
720 if (!existing_table || !new_table)
721 return AE_BAD_PARAMETER;
722
Markus Gaugusch71fc47a2008-02-05 00:04:06 +0100723 *new_table = NULL;
724
Linus Torvalds1da177e2005-04-16 15:20:36 -0700725#ifdef CONFIG_ACPI_CUSTOM_DSDT
726 if (strncmp(existing_table->signature, "DSDT", 4) == 0)
Len Brown4be44fc2005-08-05 00:44:28 -0400727 *new_table = (struct acpi_table_header *)AmlCode;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700728#endif
Thomas Renninger325a8d362012-10-01 00:23:56 +0200729 if (*new_table != NULL)
730 acpi_table_taint(existing_table);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700731 return AE_OK;
732}
733
Bob Mooref7b004a2012-02-14 18:31:56 +0800734acpi_status
735acpi_os_physical_table_override(struct acpi_table_header *existing_table,
Thomas Renningerb2a35002012-10-01 00:23:55 +0200736 acpi_physical_address *address,
737 u32 *table_length)
Bob Mooref7b004a2012-02-14 18:31:56 +0800738{
Thomas Renningerb2a35002012-10-01 00:23:55 +0200739#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;
Bob Mooref7b004a2012-02-14 18:31:56 +0800746
Thomas Renningerb2a35002012-10-01 00:23:55 +0200747 *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
Thomas Renninger325a8d362012-10-01 00:23:56 +0200791 if (*address != 0)
792 acpi_table_taint(existing_table);
Thomas Renningerb2a35002012-10-01 00:23:55 +0200793 return AE_OK;
794#endif
795}
Bob Mooref7b004a2012-02-14 18:31:56 +0800796
David Howells7d12e782006-10-05 14:55:46 +0100797static irqreturn_t acpi_irq(int irq, void *dev_id)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700798{
Len Brown5229e872008-02-06 01:26:55 -0500799 u32 handled;
800
801 handled = (*acpi_irq_handler) (acpi_irq_context);
802
803 if (handled) {
804 acpi_irq_handled++;
805 return IRQ_HANDLED;
Len Brown88bea182009-04-21 00:35:47 -0400806 } else {
807 acpi_irq_not_handled++;
Len Brown5229e872008-02-06 01:26:55 -0500808 return IRQ_NONE;
Len Brown88bea182009-04-21 00:35:47 -0400809 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700810}
811
812acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -0400813acpi_os_install_interrupt_handler(u32 gsi, acpi_osd_handler handler,
814 void *context)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700815{
816 unsigned int irq;
817
Len Brown5229e872008-02-06 01:26:55 -0500818 acpi_irq_stats_init();
819
Linus Torvalds1da177e2005-04-16 15:20:36 -0700820 /*
Rafael J. Wysocki23fe3632011-02-08 23:48:16 +0100821 * ACPI interrupts different from the SCI in our copy of the FADT are
822 * not supported.
Linus Torvalds1da177e2005-04-16 15:20:36 -0700823 */
Rafael J. Wysocki23fe3632011-02-08 23:48:16 +0100824 if (gsi != acpi_gbl_FADT.sci_interrupt)
825 return AE_BAD_PARAMETER;
826
827 if (acpi_irq_handler)
828 return AE_ALREADY_ACQUIRED;
829
Linus Torvalds1da177e2005-04-16 15:20:36 -0700830 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;
Rafael J. Wysockia8d46b92014-09-30 02:29:01 +0200838 if (request_irq(irq, acpi_irq, IRQF_SHARED, "acpi", acpi_irq)) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700839 printk(KERN_ERR PREFIX "SCI (IRQ%d) allocation failed\n", irq);
Rafael J. Wysocki23fe3632011-02-08 23:48:16 +0100840 acpi_irq_handler = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700841 return AE_NOT_ACQUIRED;
842 }
Linus Torvalds1da177e2005-04-16 15:20:36 -0700843
844 return AE_OK;
845}
846
Len Brown4be44fc2005-08-05 00:44:28 -0400847acpi_status acpi_os_remove_interrupt_handler(u32 irq, acpi_osd_handler handler)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700848{
Rafael J. Wysocki23fe3632011-02-08 23:48:16 +0100849 if (irq != acpi_gbl_FADT.sci_interrupt)
850 return AE_BAD_PARAMETER;
851
852 free_irq(irq, acpi_irq);
853 acpi_irq_handler = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700854
855 return AE_OK;
856}
857
858/*
859 * Running in interpreter thread context, safe to sleep
860 */
861
Lin Ming439913f2010-01-28 10:53:19 +0800862void acpi_os_sleep(u64 ms)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700863{
Liu Chuansheng30282292013-09-12 01:42:57 +0800864 msleep(ms);
Linus Torvalds1da177e2005-04-16 15:20:36 -0700865}
Len Brown4be44fc2005-08-05 00:44:28 -0400866
Len Brown4be44fc2005-08-05 00:44:28 -0400867void acpi_os_stall(u32 us)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700868{
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}
Len Brown4be44fc2005-08-05 00:44:28 -0400879
Linus Torvalds1da177e2005-04-16 15:20:36 -0700880/*
881 * Support ACPI 3.0 AML Timer operand
882 * Returns 64-bit free-running, monotonically increasing timer
883 * with 100ns granularity
884 */
Len Brown4be44fc2005-08-05 00:44:28 -0400885u64 acpi_os_get_timer(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700886{
Mika Westerberg10619062013-05-23 10:27:46 +0300887 u64 time_ns = ktime_to_ns(ktime_get());
888 do_div(time_ns, 100);
889 return time_ns;
Linus Torvalds1da177e2005-04-16 15:20:36 -0700890}
891
Len Brown4be44fc2005-08-05 00:44:28 -0400892acpi_status acpi_os_read_port(acpi_io_address port, u32 * value, u32 width)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700893{
894 u32 dummy;
895
896 if (!value)
897 value = &dummy;
898
Zhao Yakui49fbabf2007-11-15 17:01:06 +0800899 *value = 0;
900 if (width <= 8) {
Len Brown4be44fc2005-08-05 00:44:28 -0400901 *(u8 *) value = inb(port);
Zhao Yakui49fbabf2007-11-15 17:01:06 +0800902 } else if (width <= 16) {
Len Brown4be44fc2005-08-05 00:44:28 -0400903 *(u16 *) value = inw(port);
Zhao Yakui49fbabf2007-11-15 17:01:06 +0800904 } else if (width <= 32) {
Len Brown4be44fc2005-08-05 00:44:28 -0400905 *(u32 *) value = inl(port);
Zhao Yakui49fbabf2007-11-15 17:01:06 +0800906 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700907 BUG();
908 }
909
910 return AE_OK;
911}
Len Brown4be44fc2005-08-05 00:44:28 -0400912
Linus Torvalds1da177e2005-04-16 15:20:36 -0700913EXPORT_SYMBOL(acpi_os_read_port);
914
Len Brown4be44fc2005-08-05 00:44:28 -0400915acpi_status acpi_os_write_port(acpi_io_address port, u32 value, u32 width)
Linus Torvalds1da177e2005-04-16 15:20:36 -0700916{
Zhao Yakui49fbabf2007-11-15 17:01:06 +0800917 if (width <= 8) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700918 outb(value, port);
Zhao Yakui49fbabf2007-11-15 17:01:06 +0800919 } else if (width <= 16) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700920 outw(value, port);
Zhao Yakui49fbabf2007-11-15 17:01:06 +0800921 } else if (width <= 32) {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700922 outl(value, port);
Zhao Yakui49fbabf2007-11-15 17:01:06 +0800923 } else {
Linus Torvalds1da177e2005-04-16 15:20:36 -0700924 BUG();
925 }
926
927 return AE_OK;
928}
Len Brown4be44fc2005-08-05 00:44:28 -0400929
Linus Torvalds1da177e2005-04-16 15:20:36 -0700930EXPORT_SYMBOL(acpi_os_write_port);
931
Myron Stowee615bf52012-01-20 19:13:24 -0700932#ifdef readq
933static inline u64 read64(const volatile void __iomem *addr)
934{
935 return readq(addr);
936}
937#else
938static 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
947acpi_status
Bob Moore653f4b52012-02-14 18:29:55 +0800948acpi_os_read_memory(acpi_physical_address phys_addr, u64 *value, u32 width)
Myron Stowee615bf52012-01-20 19:13:24 -0700949{
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
Myron Stowee615bf52012-01-20 19:13:24 -0700993#ifdef writeq
994static inline void write64(u64 val, volatile void __iomem *addr)
995{
996 writeq(val, addr);
997}
998#else
999static inline void write64(u64 val, volatile void __iomem *addr)
1000{
1001 writel(val, addr);
1002 writel(val>>32, addr+4);
1003}
1004#endif
1005
1006acpi_status
Bob Moore653f4b52012-02-14 18:29:55 +08001007acpi_os_write_memory(acpi_physical_address phys_addr, u64 value, u32 width)
Myron Stowee615bf52012-01-20 19:13:24 -07001008{
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
Linus Torvalds1da177e2005-04-16 15:20:36 -07001048acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -04001049acpi_os_read_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
Bob Moorec5f02312010-08-06 08:57:53 +08001050 u64 *value, u32 width)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001051{
1052 int result, size;
Bob Moorec5f02312010-08-06 08:57:53 +08001053 u32 value32;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001054
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
Matthew Wilcoxb6ce0682008-02-10 09:45:28 -05001072 result = raw_pci_read(pci_id->segment, pci_id->bus,
1073 PCI_DEVFN(pci_id->device, pci_id->function),
Bob Moorec5f02312010-08-06 08:57:53 +08001074 reg, size, &value32);
1075 *value = value32;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001076
1077 return (result ? AE_ERROR : AE_OK);
1078}
Len Brown4be44fc2005-08-05 00:44:28 -04001079
Linus Torvalds1da177e2005-04-16 15:20:36 -07001080acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -04001081acpi_os_write_pci_configuration(struct acpi_pci_id * pci_id, u32 reg,
Lin Ming439913f2010-01-28 10:53:19 +08001082 u64 value, u32 width)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001083{
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
Matthew Wilcoxb6ce0682008-02-10 09:45:28 -05001100 result = raw_pci_write(pci_id->segment, pci_id->bus,
1101 PCI_DEVFN(pci_id->device, pci_id->function),
1102 reg, size, value);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001103
1104 return (result ? AE_ERROR : AE_OK);
1105}
1106
David Howells65f27f32006-11-22 14:55:48 +00001107static void acpi_os_execute_deferred(struct work_struct *work)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001108{
David Howells65f27f32006-11-22 14:55:48 +00001109 struct acpi_os_dpc *dpc = container_of(work, struct acpi_os_dpc, work);
Alexey Starikovskiy88db5e12007-05-09 23:31:03 -04001110
Zhang Rui19cd8472008-08-28 10:05:06 +08001111 dpc->function(dpc->context);
1112 kfree(dpc);
Zhang Rui19cd8472008-08-28 10:05:06 +08001113}
1114
Alexey Starikovskiyb8d35192006-05-05 03:23:00 -04001115/*******************************************************************************
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
Rafael J. Wysocki7b981182013-11-07 01:45:40 +01001130acpi_status acpi_os_execute(acpi_execute_type type,
1131 acpi_osd_exec_callback function, void *context)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001132{
Len Brown4be44fc2005-08-05 00:44:28 -04001133 acpi_status status = AE_OK;
1134 struct acpi_os_dpc *dpc;
Alexey Starikovskiy17bc54e2007-11-13 13:05:45 +03001135 struct workqueue_struct *queue;
Zhang Rui19cd8472008-08-28 10:05:06 +08001136 int ret;
Len Brown72945b22006-07-12 22:46:42 -04001137 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
1138 "Scheduling function [%p(%p)] for deferred execution.\n",
1139 function, context));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001140
Linus Torvalds1da177e2005-04-16 15:20:36 -07001141 /*
1142 * Allocate/initialize DPC structure. Note that this memory will be
David Howells65f27f32006-11-22 14:55:48 +00001143 * freed by the callee. The kernel handles the work_struct list in a
Linus Torvalds1da177e2005-04-16 15:20:36 -07001144 * 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
David Howells65f27f32006-11-22 14:55:48 +00001147 * having a static work_struct.
Linus Torvalds1da177e2005-04-16 15:20:36 -07001148 */
Len Brown72945b22006-07-12 22:46:42 -04001149
Rafael J. Wysocki3ae45a22012-11-02 13:09:08 +01001150 dpc = kzalloc(sizeof(struct acpi_os_dpc), GFP_ATOMIC);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001151 if (!dpc)
Lin Ming889c78b2008-12-31 09:23:57 +08001152 return AE_NO_MEMORY;
Linus Torvaldsb976fe12006-11-17 19:31:09 -08001153
Linus Torvalds1da177e2005-04-16 15:20:36 -07001154 dpc->function = function;
1155 dpc->context = context;
Linus Torvaldsb976fe12006-11-17 19:31:09 -08001156
Zhang Ruic02256b2009-06-23 10:20:29 +08001157 /*
Rafael J. Wysocki3ae45a22012-11-02 13:09:08 +01001158 * 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.
Zhang Ruic02256b2009-06-23 10:20:29 +08001161 */
Rafael J. Wysocki7b981182013-11-07 01:45:40 +01001162 if (type == OSL_NOTIFY_HANDLER) {
Rafael J. Wysocki3ae45a22012-11-02 13:09:08 +01001163 queue = kacpi_notify_wq;
Zhang Ruibc736752010-03-22 15:48:54 +08001164 INIT_WORK(&dpc->work, acpi_os_execute_deferred);
Rafael J. Wysocki3ae45a22012-11-02 13:09:08 +01001165 } else {
1166 queue = kacpid_wq;
Zhang Ruibc736752010-03-22 15:48:54 +08001167 INIT_WORK(&dpc->work, acpi_os_execute_deferred);
Rafael J. Wysocki3ae45a22012-11-02 13:09:08 +01001168 }
Zhang Ruibc736752010-03-22 15:48:54 +08001169
Tejun Heo8fec62b2010-06-29 10:07:09 +02001170 /*
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);
Zhang Rui19cd8472008-08-28 10:05:06 +08001178
1179 if (!ret) {
Lin Ming55ac9a02008-09-28 14:51:56 +08001180 printk(KERN_ERR PREFIX
1181 "Call to queue_work() failed.\n");
Alexey Starikovskiy17bc54e2007-11-13 13:05:45 +03001182 status = AE_ERROR;
1183 kfree(dpc);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001184 }
Lin Ming889c78b2008-12-31 09:23:57 +08001185 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001186}
Alexey Starikovskiyb8d35192006-05-05 03:23:00 -04001187EXPORT_SYMBOL(acpi_os_execute);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001188
Lin Mingbd6f10a2012-05-22 16:43:49 +08001189void acpi_os_wait_events_complete(void)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001190{
Lv Zheng90253a72014-11-05 15:06:13 +08001191 /*
1192 * Make sure the GPE handler or the fixed event handler is not used
1193 * on another CPU after removal.
1194 */
1195 if (acpi_irq_handler)
1196 synchronize_hardirq(acpi_gbl_FADT.sci_interrupt);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001197 flush_workqueue(kacpid_wq);
Zhang Rui2f67a062008-04-29 02:34:42 -04001198 flush_workqueue(kacpi_notify_wq);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001199}
Len Brown4be44fc2005-08-05 00:44:28 -04001200
Rafael J. Wysocki7b981182013-11-07 01:45:40 +01001201struct acpi_hp_work {
1202 struct work_struct work;
Rafael J. Wysocki1e3bcb52014-03-03 00:40:38 +01001203 struct acpi_device *adev;
Rafael J. Wysocki7b981182013-11-07 01:45:40 +01001204 u32 src;
1205};
1206
1207static void acpi_hotplug_work_fn(struct work_struct *work)
1208{
1209 struct acpi_hp_work *hpw = container_of(work, struct acpi_hp_work, work);
1210
1211 acpi_os_wait_events_complete();
Rafael J. Wysocki1e3bcb52014-03-03 00:40:38 +01001212 acpi_device_hotplug(hpw->adev, hpw->src);
Rafael J. Wysocki7b981182013-11-07 01:45:40 +01001213 kfree(hpw);
1214}
1215
Rafael J. Wysocki1e3bcb52014-03-03 00:40:38 +01001216acpi_status acpi_hotplug_schedule(struct acpi_device *adev, u32 src)
Rafael J. Wysocki7b981182013-11-07 01:45:40 +01001217{
1218 struct acpi_hp_work *hpw;
1219
1220 ACPI_DEBUG_PRINT((ACPI_DB_EXEC,
Rafael J. Wysocki1e3bcb52014-03-03 00:40:38 +01001221 "Scheduling hotplug event (%p, %u) for deferred execution.\n",
1222 adev, src));
Rafael J. Wysocki7b981182013-11-07 01:45:40 +01001223
1224 hpw = kmalloc(sizeof(*hpw), GFP_KERNEL);
1225 if (!hpw)
1226 return AE_NO_MEMORY;
1227
1228 INIT_WORK(&hpw->work, acpi_hotplug_work_fn);
Rafael J. Wysocki1e3bcb52014-03-03 00:40:38 +01001229 hpw->adev = adev;
Rafael J. Wysocki7b981182013-11-07 01:45:40 +01001230 hpw->src = src;
1231 /*
1232 * We can't run hotplug code in kacpid_wq/kacpid_notify_wq etc., because
1233 * the hotplug code may call driver .remove() functions, which may
1234 * invoke flush_scheduled_work()/acpi_os_wait_events_complete() to flush
1235 * these workqueues.
1236 */
1237 if (!queue_work(kacpi_hotplug_wq, &hpw->work)) {
1238 kfree(hpw);
1239 return AE_ERROR;
1240 }
1241 return AE_OK;
1242}
1243
Rafael J. Wysockid7831562013-11-22 21:52:12 +01001244bool acpi_queue_hotplug_work(struct work_struct *work)
1245{
1246 return queue_work(kacpi_hotplug_wq, work);
1247}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001248
Linus Torvalds1da177e2005-04-16 15:20:36 -07001249acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -04001250acpi_os_create_semaphore(u32 max_units, u32 initial_units, acpi_handle * handle)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001251{
Len Brown4be44fc2005-08-05 00:44:28 -04001252 struct semaphore *sem = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001253
jhbird.choi@samsung.com2d0acb42014-03-20 16:35:56 +09001254 sem = acpi_os_allocate_zeroed(sizeof(struct semaphore));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001255 if (!sem)
Patrick Mocheld550d982006-06-27 00:41:40 -04001256 return AE_NO_MEMORY;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001257
1258 sema_init(sem, initial_units);
1259
Len Brown4be44fc2005-08-05 00:44:28 -04001260 *handle = (acpi_handle *) sem;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001261
Len Brown4be44fc2005-08-05 00:44:28 -04001262 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Creating semaphore[%p|%d].\n",
1263 *handle, initial_units));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001264
Patrick Mocheld550d982006-06-27 00:41:40 -04001265 return AE_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001266}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001267
Linus Torvalds1da177e2005-04-16 15:20:36 -07001268/*
1269 * TODO: A better way to delete semaphores? Linux doesn't have a
1270 * 'delete_semaphore()' function -- may result in an invalid
1271 * pointer dereference for non-synchronized consumers. Should
1272 * we at least check for blocked threads and signal/cancel them?
1273 */
1274
Len Brown4be44fc2005-08-05 00:44:28 -04001275acpi_status acpi_os_delete_semaphore(acpi_handle handle)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001276{
Len Brown4be44fc2005-08-05 00:44:28 -04001277 struct semaphore *sem = (struct semaphore *)handle;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001278
Linus Torvalds1da177e2005-04-16 15:20:36 -07001279 if (!sem)
Patrick Mocheld550d982006-06-27 00:41:40 -04001280 return AE_BAD_PARAMETER;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001281
Len Brown4be44fc2005-08-05 00:44:28 -04001282 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Deleting semaphore[%p].\n", handle));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001283
Matthew Wilcoxf1241c82008-03-14 13:43:13 -04001284 BUG_ON(!list_empty(&sem->wait_list));
Len Brown02438d82006-06-30 03:19:10 -04001285 kfree(sem);
Len Brown4be44fc2005-08-05 00:44:28 -04001286 sem = NULL;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001287
Patrick Mocheld550d982006-06-27 00:41:40 -04001288 return AE_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001289}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001290
Linus Torvalds1da177e2005-04-16 15:20:36 -07001291/*
Linus Torvalds1da177e2005-04-16 15:20:36 -07001292 * TODO: Support for units > 1?
1293 */
Len Brown4be44fc2005-08-05 00:44:28 -04001294acpi_status acpi_os_wait_semaphore(acpi_handle handle, u32 units, u16 timeout)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001295{
Len Brown4be44fc2005-08-05 00:44:28 -04001296 acpi_status status = AE_OK;
1297 struct semaphore *sem = (struct semaphore *)handle;
Matthew Wilcoxf1241c82008-03-14 13:43:13 -04001298 long jiffies;
Len Brown4be44fc2005-08-05 00:44:28 -04001299 int ret = 0;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001300
Linus Torvalds1da177e2005-04-16 15:20:36 -07001301 if (!sem || (units < 1))
Patrick Mocheld550d982006-06-27 00:41:40 -04001302 return AE_BAD_PARAMETER;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001303
1304 if (units > 1)
Patrick Mocheld550d982006-06-27 00:41:40 -04001305 return AE_SUPPORT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001306
Len Brown4be44fc2005-08-05 00:44:28 -04001307 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Waiting for semaphore[%p|%d|%d]\n",
1308 handle, units, timeout));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001309
Matthew Wilcoxf1241c82008-03-14 13:43:13 -04001310 if (timeout == ACPI_WAIT_FOREVER)
1311 jiffies = MAX_SCHEDULE_TIMEOUT;
1312 else
1313 jiffies = msecs_to_jiffies(timeout);
Al Stonecad1525a2013-12-04 12:59:11 -07001314
Matthew Wilcoxf1241c82008-03-14 13:43:13 -04001315 ret = down_timeout(sem, jiffies);
1316 if (ret)
1317 status = AE_TIME;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001318
1319 if (ACPI_FAILURE(status)) {
Bjorn Helgaas9e7e2c02006-04-27 05:25:00 -04001320 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
Thomas Renningera6fc6722006-06-26 23:58:43 -04001321 "Failed to acquire semaphore[%p|%d|%d], %s",
Len Brown4be44fc2005-08-05 00:44:28 -04001322 handle, units, timeout,
1323 acpi_format_exception(status)));
1324 } else {
1325 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX,
Thomas Renningera6fc6722006-06-26 23:58:43 -04001326 "Acquired semaphore[%p|%d|%d]", handle,
Len Brown4be44fc2005-08-05 00:44:28 -04001327 units, timeout));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001328 }
1329
Patrick Mocheld550d982006-06-27 00:41:40 -04001330 return status;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001331}
Linus Torvalds1da177e2005-04-16 15:20:36 -07001332
Linus Torvalds1da177e2005-04-16 15:20:36 -07001333/*
1334 * TODO: Support for units > 1?
1335 */
Len Brown4be44fc2005-08-05 00:44:28 -04001336acpi_status acpi_os_signal_semaphore(acpi_handle handle, u32 units)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001337{
Len Brown4be44fc2005-08-05 00:44:28 -04001338 struct semaphore *sem = (struct semaphore *)handle;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001339
Linus Torvalds1da177e2005-04-16 15:20:36 -07001340 if (!sem || (units < 1))
Patrick Mocheld550d982006-06-27 00:41:40 -04001341 return AE_BAD_PARAMETER;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001342
1343 if (units > 1)
Patrick Mocheld550d982006-06-27 00:41:40 -04001344 return AE_SUPPORT;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001345
Len Brown4be44fc2005-08-05 00:44:28 -04001346 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX, "Signaling semaphore[%p|%d]\n", handle,
1347 units));
Linus Torvalds1da177e2005-04-16 15:20:36 -07001348
1349 up(sem);
1350
Patrick Mocheld550d982006-06-27 00:41:40 -04001351 return AE_OK;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001352}
Len Brown4be44fc2005-08-05 00:44:28 -04001353
Linus Torvalds1da177e2005-04-16 15:20:36 -07001354#ifdef ACPI_FUTURE_USAGE
Len Brown4be44fc2005-08-05 00:44:28 -04001355u32 acpi_os_get_line(char *buffer)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001356{
1357
1358#ifdef ENABLE_DEBUGGER
1359 if (acpi_in_debugger) {
1360 u32 chars;
1361
1362 kdb_read(buffer, sizeof(line_buf));
1363
1364 /* remove the CR kdb includes */
1365 chars = strlen(buffer) - 1;
1366 buffer[chars] = '\0';
1367 }
1368#endif
1369
1370 return 0;
1371}
Len Brown4be44fc2005-08-05 00:44:28 -04001372#endif /* ACPI_FUTURE_USAGE */
Linus Torvalds1da177e2005-04-16 15:20:36 -07001373
Len Brown4be44fc2005-08-05 00:44:28 -04001374acpi_status acpi_os_signal(u32 function, void *info)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001375{
Len Brown4be44fc2005-08-05 00:44:28 -04001376 switch (function) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001377 case ACPI_SIGNAL_FATAL:
1378 printk(KERN_ERR PREFIX "Fatal opcode executed\n");
1379 break;
1380 case ACPI_SIGNAL_BREAKPOINT:
1381 /*
1382 * AML Breakpoint
1383 * ACPI spec. says to treat it as a NOP unless
1384 * you are debugging. So if/when we integrate
1385 * AML debugger into the kernel debugger its
1386 * hook will go here. But until then it is
1387 * not useful to print anything on breakpoints.
1388 */
1389 break;
1390 default:
1391 break;
1392 }
1393
1394 return AE_OK;
1395}
Len Brown4be44fc2005-08-05 00:44:28 -04001396
Len Brown4be44fc2005-08-05 00:44:28 -04001397static int __init acpi_os_name_setup(char *str)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001398{
1399 char *p = acpi_os_name;
Len Brown4be44fc2005-08-05 00:44:28 -04001400 int count = ACPI_MAX_OVERRIDE_LEN - 1;
Linus Torvalds1da177e2005-04-16 15:20:36 -07001401
1402 if (!str || !*str)
1403 return 0;
1404
Dan Carpenter5e2be4e2013-10-18 12:01:43 +03001405 for (; count-- && *str; str++) {
Linus Torvalds1da177e2005-04-16 15:20:36 -07001406 if (isalnum(*str) || *str == ' ' || *str == ':')
1407 *p++ = *str;
1408 else if (*str == '\'' || *str == '"')
1409 continue;
1410 else
1411 break;
1412 }
1413 *p = 0;
1414
1415 return 1;
Len Brown4be44fc2005-08-05 00:44:28 -04001416
Linus Torvalds1da177e2005-04-16 15:20:36 -07001417}
1418
1419__setup("acpi_os_name=", acpi_os_name_setup);
1420
Lin Ming12d32062010-12-09 16:51:06 +08001421#define OSI_STRING_LENGTH_MAX 64 /* arbitrary */
1422#define OSI_STRING_ENTRIES_MAX 16 /* arbitrary */
1423
1424struct osi_setup_entry {
1425 char string[OSI_STRING_LENGTH_MAX];
1426 bool enable;
1427};
1428
Hanjun Guoe73d3132013-08-13 18:31:15 +08001429static struct osi_setup_entry
1430 osi_setup_entries[OSI_STRING_ENTRIES_MAX] __initdata = {
Shaohua Liaa165972011-07-28 13:48:43 -07001431 {"Module Device", true},
1432 {"Processor Device", true},
1433 {"3.0 _SCP Extensions", true},
1434 {"Processor Aggregator Device", true},
1435};
Lin Ming12d32062010-12-09 16:51:06 +08001436
Lin Mingd90aa922010-12-09 16:50:52 +08001437void __init acpi_osi_setup(char *str)
1438{
Lin Ming12d32062010-12-09 16:51:06 +08001439 struct osi_setup_entry *osi;
1440 bool enable = true;
1441 int i;
1442
Lin Mingd90aa922010-12-09 16:50:52 +08001443 if (!acpi_gbl_create_osi_method)
1444 return;
1445
1446 if (str == NULL || *str == '\0') {
1447 printk(KERN_INFO PREFIX "_OSI method disabled\n");
1448 acpi_gbl_create_osi_method = FALSE;
Lin Ming12d32062010-12-09 16:51:06 +08001449 return;
1450 }
1451
1452 if (*str == '!') {
1453 str++;
Lv Zheng5dc17982013-07-22 16:08:25 +08001454 if (*str == '\0') {
1455 osi_linux.default_disabling = 1;
1456 return;
Lv Zheng741d8122013-07-22 16:08:36 +08001457 } else if (*str == '*') {
1458 acpi_update_interfaces(ACPI_DISABLE_ALL_STRINGS);
1459 for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
1460 osi = &osi_setup_entries[i];
1461 osi->enable = false;
1462 }
1463 return;
Lv Zheng5dc17982013-07-22 16:08:25 +08001464 }
Lin Ming12d32062010-12-09 16:51:06 +08001465 enable = false;
1466 }
1467
1468 for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
1469 osi = &osi_setup_entries[i];
1470 if (!strcmp(osi->string, str)) {
1471 osi->enable = enable;
1472 break;
1473 } else if (osi->string[0] == '\0') {
1474 osi->enable = enable;
1475 strncpy(osi->string, str, OSI_STRING_LENGTH_MAX);
1476 break;
1477 }
1478 }
Lin Mingd90aa922010-12-09 16:50:52 +08001479}
1480
Len Brownd4b7dc42008-01-23 20:50:56 -05001481static void __init set_osi_linux(unsigned int enable)
1482{
Lin Mingd90aa922010-12-09 16:50:52 +08001483 if (osi_linux.enable != enable)
Len Brownd4b7dc42008-01-23 20:50:56 -05001484 osi_linux.enable = enable;
Lin Mingb0ed7a92010-08-06 09:35:51 +08001485
1486 if (osi_linux.enable)
1487 acpi_osi_setup("Linux");
1488 else
1489 acpi_osi_setup("!Linux");
1490
Len Brownd4b7dc42008-01-23 20:50:56 -05001491 return;
1492}
Len Brownf5076542007-05-30 00:10:38 -04001493
Len Brownd4b7dc42008-01-23 20:50:56 -05001494static void __init acpi_cmdline_osi_linux(unsigned int enable)
1495{
Lin Mingd90aa922010-12-09 16:50:52 +08001496 osi_linux.cmdline = 1; /* cmdline set the default and override DMI */
1497 osi_linux.dmi = 0;
Len Brownd4b7dc42008-01-23 20:50:56 -05001498 set_osi_linux(enable);
Len Brownf5076542007-05-30 00:10:38 -04001499
Len Brownd4b7dc42008-01-23 20:50:56 -05001500 return;
1501}
1502
1503void __init acpi_dmi_osi_linux(int enable, const struct dmi_system_id *d)
1504{
Len Brownd4b7dc42008-01-23 20:50:56 -05001505 printk(KERN_NOTICE PREFIX "DMI detected: %s\n", d->ident);
1506
1507 if (enable == -1)
1508 return;
1509
Lin Mingd90aa922010-12-09 16:50:52 +08001510 osi_linux.dmi = 1; /* DMI knows that this box asks OSI(Linux) */
Len Brownd4b7dc42008-01-23 20:50:56 -05001511 set_osi_linux(enable);
1512
Len Brownf5076542007-05-30 00:10:38 -04001513 return;
1514}
1515
Linus Torvalds1da177e2005-04-16 15:20:36 -07001516/*
Len Brownae00d812007-05-29 18:43:33 -04001517 * Modify the list of "OS Interfaces" reported to BIOS via _OSI
1518 *
Linus Torvalds1da177e2005-04-16 15:20:36 -07001519 * empty string disables _OSI
Len Brownae00d812007-05-29 18:43:33 -04001520 * string starting with '!' disables that string
1521 * otherwise string is added to list, augmenting built-in strings
Linus Torvalds1da177e2005-04-16 15:20:36 -07001522 */
Lin Mingb0ed7a92010-08-06 09:35:51 +08001523static void __init acpi_osi_setup_late(void)
1524{
Lin Ming12d32062010-12-09 16:51:06 +08001525 struct osi_setup_entry *osi;
1526 char *str;
1527 int i;
Lin Mingd90aa922010-12-09 16:50:52 +08001528 acpi_status status;
Lin Mingb0ed7a92010-08-06 09:35:51 +08001529
Lv Zheng5dc17982013-07-22 16:08:25 +08001530 if (osi_linux.default_disabling) {
1531 status = acpi_update_interfaces(ACPI_DISABLE_ALL_VENDOR_STRINGS);
1532
1533 if (ACPI_SUCCESS(status))
1534 printk(KERN_INFO PREFIX "Disabled all _OSI OS vendors\n");
1535 }
1536
Lin Ming12d32062010-12-09 16:51:06 +08001537 for (i = 0; i < OSI_STRING_ENTRIES_MAX; i++) {
1538 osi = &osi_setup_entries[i];
1539 str = osi->string;
Lin Mingb0ed7a92010-08-06 09:35:51 +08001540
Lin Ming12d32062010-12-09 16:51:06 +08001541 if (*str == '\0')
1542 break;
1543 if (osi->enable) {
1544 status = acpi_install_interface(str);
Lin Mingd90aa922010-12-09 16:50:52 +08001545
Lin Ming12d32062010-12-09 16:51:06 +08001546 if (ACPI_SUCCESS(status))
1547 printk(KERN_INFO PREFIX "Added _OSI(%s)\n", str);
1548 } else {
1549 status = acpi_remove_interface(str);
Lin Mingd90aa922010-12-09 16:50:52 +08001550
Lin Ming12d32062010-12-09 16:51:06 +08001551 if (ACPI_SUCCESS(status))
1552 printk(KERN_INFO PREFIX "Deleted _OSI(%s)\n", str);
1553 }
Lin Mingb0ed7a92010-08-06 09:35:51 +08001554 }
1555}
1556
Lin Mingd90aa922010-12-09 16:50:52 +08001557static int __init osi_setup(char *str)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001558{
Lin Mingd90aa922010-12-09 16:50:52 +08001559 if (str && !strcmp("Linux", str))
1560 acpi_cmdline_osi_linux(1);
1561 else if (str && !strcmp("!Linux", str))
1562 acpi_cmdline_osi_linux(0);
1563 else
1564 acpi_osi_setup(str);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001565
1566 return 1;
1567}
1568
Lin Mingd90aa922010-12-09 16:50:52 +08001569__setup("acpi_osi=", osi_setup);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001570
Bob Moore22b5afc2014-03-24 14:49:00 +08001571/*
Lv Zheng08e1d7c2014-03-24 14:49:22 +08001572 * Disable the auto-serialization of named objects creation methods.
Bob Moore22b5afc2014-03-24 14:49:00 +08001573 *
Lv Zheng08e1d7c2014-03-24 14:49:22 +08001574 * This feature is enabled by default. It marks the AML control methods
Bob Moore22b5afc2014-03-24 14:49:00 +08001575 * that contain the opcodes to create named objects as "Serialized".
1576 */
Lv Zheng08e1d7c2014-03-24 14:49:22 +08001577static int __init acpi_no_auto_serialize_setup(char *str)
Linus Torvalds1da177e2005-04-16 15:20:36 -07001578{
Lv Zheng08e1d7c2014-03-24 14:49:22 +08001579 acpi_gbl_auto_serialize_methods = FALSE;
1580 pr_info("ACPI: auto-serialization disabled\n");
Linus Torvalds1da177e2005-04-16 15:20:36 -07001581
1582 return 1;
1583}
1584
Lv Zheng08e1d7c2014-03-24 14:49:22 +08001585__setup("acpi_no_auto_serialize", acpi_no_auto_serialize_setup);
Linus Torvalds1da177e2005-04-16 15:20:36 -07001586
Thomas Renningerdf92e692008-02-04 23:31:22 -08001587/* Check of resource interference between native drivers and ACPI
1588 * OperationRegions (SystemIO and System Memory only).
1589 * IO ports and memory declared in ACPI might be used by the ACPI subsystem
1590 * in arbitrary AML code and can interfere with legacy drivers.
1591 * acpi_enforce_resources= can be set to:
1592 *
Luca Tettamanti7e905602009-03-30 00:01:27 +02001593 * - strict (default) (2)
Thomas Renningerdf92e692008-02-04 23:31:22 -08001594 * -> further driver trying to access the resources will not load
Luca Tettamanti7e905602009-03-30 00:01:27 +02001595 * - lax (1)
Thomas Renningerdf92e692008-02-04 23:31:22 -08001596 * -> further driver trying to access the resources will load, but you
1597 * get a system message that something might go wrong...
1598 *
1599 * - no (0)
1600 * -> ACPI Operation Region resources will not be registered
1601 *
1602 */
1603#define ENFORCE_RESOURCES_STRICT 2
1604#define ENFORCE_RESOURCES_LAX 1
1605#define ENFORCE_RESOURCES_NO 0
1606
Luca Tettamanti7e905602009-03-30 00:01:27 +02001607static unsigned int acpi_enforce_resources = ENFORCE_RESOURCES_STRICT;
Thomas Renningerdf92e692008-02-04 23:31:22 -08001608
1609static int __init acpi_enforce_resources_setup(char *str)
1610{
1611 if (str == NULL || *str == '\0')
1612 return 0;
1613
1614 if (!strcmp("strict", str))
1615 acpi_enforce_resources = ENFORCE_RESOURCES_STRICT;
1616 else if (!strcmp("lax", str))
1617 acpi_enforce_resources = ENFORCE_RESOURCES_LAX;
1618 else if (!strcmp("no", str))
1619 acpi_enforce_resources = ENFORCE_RESOURCES_NO;
1620
1621 return 1;
1622}
1623
1624__setup("acpi_enforce_resources=", acpi_enforce_resources_setup);
1625
1626/* Check for resource conflicts between ACPI OperationRegions and native
1627 * drivers */
Jean Delvare876fba42009-11-11 15:22:15 +01001628int acpi_check_resource_conflict(const struct resource *res)
Thomas Renningerdf92e692008-02-04 23:31:22 -08001629{
Lin Mingf654c0f2012-01-12 13:10:32 +08001630 acpi_adr_space_type space_id;
1631 acpi_size length;
1632 u8 warn = 0;
1633 int clash = 0;
Thomas Renningerdf92e692008-02-04 23:31:22 -08001634
1635 if (acpi_enforce_resources == ENFORCE_RESOURCES_NO)
1636 return 0;
1637 if (!(res->flags & IORESOURCE_IO) && !(res->flags & IORESOURCE_MEM))
1638 return 0;
1639
Lin Mingf654c0f2012-01-12 13:10:32 +08001640 if (res->flags & IORESOURCE_IO)
1641 space_id = ACPI_ADR_SPACE_SYSTEM_IO;
1642 else
1643 space_id = ACPI_ADR_SPACE_SYSTEM_MEMORY;
Thomas Renningerdf92e692008-02-04 23:31:22 -08001644
Alexandru Gheorghiue4f52242013-03-12 08:53:02 +00001645 length = resource_size(res);
Lin Mingf654c0f2012-01-12 13:10:32 +08001646 if (acpi_enforce_resources != ENFORCE_RESOURCES_NO)
1647 warn = 1;
1648 clash = acpi_check_address_range(space_id, res->start, length, warn);
Thomas Renningerdf92e692008-02-04 23:31:22 -08001649
1650 if (clash) {
1651 if (acpi_enforce_resources != ENFORCE_RESOURCES_NO) {
Jean Delvare14f03342009-09-08 15:31:46 +02001652 if (acpi_enforce_resources == ENFORCE_RESOURCES_LAX)
1653 printk(KERN_NOTICE "ACPI: This conflict may"
1654 " cause random problems and system"
1655 " instability\n");
1656 printk(KERN_INFO "ACPI: If an ACPI driver is available"
1657 " for this device, you should use it instead of"
1658 " the native driver\n");
Thomas Renningerdf92e692008-02-04 23:31:22 -08001659 }
1660 if (acpi_enforce_resources == ENFORCE_RESOURCES_STRICT)
1661 return -EBUSY;
1662 }
1663 return 0;
1664}
Thomas Renninger443dea72008-02-04 23:31:23 -08001665EXPORT_SYMBOL(acpi_check_resource_conflict);
Thomas Renningerdf92e692008-02-04 23:31:22 -08001666
1667int acpi_check_region(resource_size_t start, resource_size_t n,
1668 const char *name)
1669{
1670 struct resource res = {
1671 .start = start,
1672 .end = start + n - 1,
1673 .name = name,
1674 .flags = IORESOURCE_IO,
1675 };
1676
1677 return acpi_check_resource_conflict(&res);
1678}
1679EXPORT_SYMBOL(acpi_check_region);
1680
Linus Torvalds1da177e2005-04-16 15:20:36 -07001681/*
Jean Delvare70dd6be2010-05-27 19:58:37 +02001682 * Let drivers know whether the resource checks are effective
1683 */
1684int acpi_resources_are_enforced(void)
1685{
1686 return acpi_enforce_resources == ENFORCE_RESOURCES_STRICT;
1687}
1688EXPORT_SYMBOL(acpi_resources_are_enforced);
1689
1690/*
Lin Ming9f63b882011-03-23 17:26:34 +08001691 * Deallocate the memory for a spinlock.
1692 */
1693void acpi_os_delete_lock(acpi_spinlock handle)
1694{
1695 ACPI_FREE(handle);
1696}
1697
1698/*
Robert Moore73459f72005-06-24 00:00:00 -04001699 * Acquire a spinlock.
1700 *
1701 * handle is a pointer to the spinlock_t.
Robert Moore73459f72005-06-24 00:00:00 -04001702 */
1703
Bob Moore967440e32006-06-23 17:04:00 -04001704acpi_cpu_flags acpi_os_acquire_lock(acpi_spinlock lockp)
Robert Moore73459f72005-06-24 00:00:00 -04001705{
Bob Mooreb8e4d892006-01-27 16:43:00 -05001706 acpi_cpu_flags flags;
Bob Moore967440e32006-06-23 17:04:00 -04001707 spin_lock_irqsave(lockp, flags);
Robert Moore73459f72005-06-24 00:00:00 -04001708 return flags;
1709}
1710
1711/*
1712 * Release a spinlock. See above.
1713 */
1714
Bob Moore967440e32006-06-23 17:04:00 -04001715void acpi_os_release_lock(acpi_spinlock lockp, acpi_cpu_flags flags)
Robert Moore73459f72005-06-24 00:00:00 -04001716{
Bob Moore967440e32006-06-23 17:04:00 -04001717 spin_unlock_irqrestore(lockp, flags);
Robert Moore73459f72005-06-24 00:00:00 -04001718}
1719
Robert Moore73459f72005-06-24 00:00:00 -04001720#ifndef ACPI_USE_LOCAL_CACHE
1721
1722/*******************************************************************************
1723 *
1724 * FUNCTION: acpi_os_create_cache
1725 *
Bob Mooreb229cf92006-04-21 17:15:00 -04001726 * PARAMETERS: name - Ascii name for the cache
1727 * size - Size of each cached object
1728 * depth - Maximum depth of the cache (in objects) <ignored>
1729 * cache - Where the new cache object is returned
Robert Moore73459f72005-06-24 00:00:00 -04001730 *
Bob Mooreb229cf92006-04-21 17:15:00 -04001731 * RETURN: status
Robert Moore73459f72005-06-24 00:00:00 -04001732 *
1733 * DESCRIPTION: Create a cache object
1734 *
1735 ******************************************************************************/
1736
1737acpi_status
Len Brown4be44fc2005-08-05 00:44:28 -04001738acpi_os_create_cache(char *name, u16 size, u16 depth, acpi_cache_t ** cache)
Robert Moore73459f72005-06-24 00:00:00 -04001739{
Paul Mundt20c2df82007-07-20 10:11:58 +09001740 *cache = kmem_cache_create(name, size, 0, 0, NULL);
Adrian Bunka6fdbf92006-12-19 12:56:13 -08001741 if (*cache == NULL)
Bob Mooreb229cf92006-04-21 17:15:00 -04001742 return AE_ERROR;
1743 else
1744 return AE_OK;
Robert Moore73459f72005-06-24 00:00:00 -04001745}
1746
1747/*******************************************************************************
1748 *
1749 * FUNCTION: acpi_os_purge_cache
1750 *
1751 * PARAMETERS: Cache - Handle to cache object
1752 *
1753 * RETURN: Status
1754 *
1755 * DESCRIPTION: Free all objects within the requested cache.
1756 *
1757 ******************************************************************************/
1758
Len Brown4be44fc2005-08-05 00:44:28 -04001759acpi_status acpi_os_purge_cache(acpi_cache_t * cache)
Robert Moore73459f72005-06-24 00:00:00 -04001760{
Jan Engelhardt50dd0962006-10-01 00:28:50 +02001761 kmem_cache_shrink(cache);
Len Brown4be44fc2005-08-05 00:44:28 -04001762 return (AE_OK);
Robert Moore73459f72005-06-24 00:00:00 -04001763}
1764
1765/*******************************************************************************
1766 *
1767 * FUNCTION: acpi_os_delete_cache
1768 *
1769 * PARAMETERS: Cache - Handle to cache object
1770 *
1771 * RETURN: Status
1772 *
1773 * DESCRIPTION: Free all objects within the requested cache and delete the
1774 * cache object.
1775 *
1776 ******************************************************************************/
1777
Len Brown4be44fc2005-08-05 00:44:28 -04001778acpi_status acpi_os_delete_cache(acpi_cache_t * cache)
Robert Moore73459f72005-06-24 00:00:00 -04001779{
Alexey Dobriyan1a1d92c2006-09-27 01:49:40 -07001780 kmem_cache_destroy(cache);
Len Brown4be44fc2005-08-05 00:44:28 -04001781 return (AE_OK);
Robert Moore73459f72005-06-24 00:00:00 -04001782}
1783
1784/*******************************************************************************
1785 *
1786 * FUNCTION: acpi_os_release_object
1787 *
1788 * PARAMETERS: Cache - Handle to cache object
1789 * Object - The object to be released
1790 *
1791 * RETURN: None
1792 *
1793 * DESCRIPTION: Release an object to the specified cache. If cache is full,
1794 * the object is deleted.
1795 *
1796 ******************************************************************************/
1797
Len Brown4be44fc2005-08-05 00:44:28 -04001798acpi_status acpi_os_release_object(acpi_cache_t * cache, void *object)
Robert Moore73459f72005-06-24 00:00:00 -04001799{
Len Brown4be44fc2005-08-05 00:44:28 -04001800 kmem_cache_free(cache, object);
1801 return (AE_OK);
Robert Moore73459f72005-06-24 00:00:00 -04001802}
Robert Moore73459f72005-06-24 00:00:00 -04001803#endif
Myron Stowed362eda2010-10-21 14:24:04 -06001804
Lv Zhenga94e88c2014-04-04 12:39:11 +08001805static int __init acpi_no_static_ssdt_setup(char *s)
Lv Zhengb75dd292013-06-08 00:58:48 +00001806{
Lv Zhenga94e88c2014-04-04 12:39:11 +08001807 acpi_gbl_disable_ssdt_table_install = TRUE;
1808 pr_info("ACPI: static SSDT installation disabled\n");
Lv Zhengb75dd292013-06-08 00:58:48 +00001809
Lv Zhenga94e88c2014-04-04 12:39:11 +08001810 return 0;
Lv Zhengb75dd292013-06-08 00:58:48 +00001811}
1812
Lv Zhenga94e88c2014-04-04 12:39:11 +08001813early_param("acpi_no_static_ssdt", acpi_no_static_ssdt_setup);
Lv Zhengb75dd292013-06-08 00:58:48 +00001814
Lv Zheng4dde5072014-02-11 11:01:52 +08001815static int __init acpi_disable_return_repair(char *s)
1816{
1817 printk(KERN_NOTICE PREFIX
1818 "ACPI: Predefined validation mechanism disabled\n");
1819 acpi_gbl_disable_auto_repair = TRUE;
1820
1821 return 1;
1822}
1823
1824__setup("acpica_no_return_repair", acpi_disable_return_repair);
1825
Myron Stowed362eda2010-10-21 14:24:04 -06001826acpi_status __init acpi_os_initialize(void)
1827{
1828 acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1a_event_block);
1829 acpi_os_map_generic_address(&acpi_gbl_FADT.xpm1b_event_block);
1830 acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe0_block);
1831 acpi_os_map_generic_address(&acpi_gbl_FADT.xgpe1_block);
Randy Wrighta4714a82014-06-04 08:55:59 -07001832 if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER) {
1833 /*
1834 * Use acpi_os_map_generic_address to pre-map the reset
1835 * register if it's in system memory.
1836 */
1837 int rv;
1838
1839 rv = acpi_os_map_generic_address(&acpi_gbl_FADT.reset_register);
1840 pr_debug(PREFIX "%s: map reset_reg status %d\n", __func__, rv);
1841 }
Myron Stowed362eda2010-10-21 14:24:04 -06001842
1843 return AE_OK;
1844}
1845
Zhang Rui32d47ee2010-12-08 10:40:36 +08001846acpi_status __init acpi_os_initialize1(void)
Myron Stowed362eda2010-10-21 14:24:04 -06001847{
Tejun Heo44d25882011-02-01 11:42:42 +01001848 kacpid_wq = alloc_workqueue("kacpid", 0, 1);
1849 kacpi_notify_wq = alloc_workqueue("kacpi_notify", 0, 1);
Rafael J. Wysockid7831562013-11-22 21:52:12 +01001850 kacpi_hotplug_wq = alloc_ordered_workqueue("kacpi_hotplug", 0);
Myron Stowed362eda2010-10-21 14:24:04 -06001851 BUG_ON(!kacpid_wq);
1852 BUG_ON(!kacpi_notify_wq);
1853 BUG_ON(!kacpi_hotplug_wq);
Len Brown1bd64d42010-10-26 14:50:56 -04001854 acpi_install_interface_handler(acpi_osi_handler);
1855 acpi_osi_setup_late();
Myron Stowed362eda2010-10-21 14:24:04 -06001856 return AE_OK;
1857}
1858
1859acpi_status acpi_os_terminate(void)
1860{
1861 if (acpi_irq_handler) {
Rafael J. Wysocki23fe3632011-02-08 23:48:16 +01001862 acpi_os_remove_interrupt_handler(acpi_gbl_FADT.sci_interrupt,
Myron Stowed362eda2010-10-21 14:24:04 -06001863 acpi_irq_handler);
1864 }
1865
1866 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe1_block);
1867 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xgpe0_block);
1868 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1b_event_block);
1869 acpi_os_unmap_generic_address(&acpi_gbl_FADT.xpm1a_event_block);
Randy Wrighta4714a82014-06-04 08:55:59 -07001870 if (acpi_gbl_FADT.flags & ACPI_FADT_RESET_REGISTER)
1871 acpi_os_unmap_generic_address(&acpi_gbl_FADT.reset_register);
Myron Stowed362eda2010-10-21 14:24:04 -06001872
1873 destroy_workqueue(kacpid_wq);
1874 destroy_workqueue(kacpi_notify_wq);
1875 destroy_workqueue(kacpi_hotplug_wq);
1876
1877 return AE_OK;
1878}
Tang Liang09f98a82011-12-09 10:05:54 +08001879
1880acpi_status acpi_os_prepare_sleep(u8 sleep_state, u32 pm1a_control,
1881 u32 pm1b_control)
1882{
1883 int rc = 0;
1884 if (__acpi_os_prepare_sleep)
1885 rc = __acpi_os_prepare_sleep(sleep_state,
1886 pm1a_control, pm1b_control);
1887 if (rc < 0)
1888 return AE_ERROR;
1889 else if (rc > 0)
1890 return AE_CTRL_SKIP;
1891
1892 return AE_OK;
1893}
1894
1895void acpi_os_set_prepare_sleep(int (*func)(u8 sleep_state,
1896 u32 pm1a_ctrl, u32 pm1b_ctrl))
1897{
1898 __acpi_os_prepare_sleep = func;
1899}
Yinghai Lu92d8aff2013-01-21 13:20:47 -08001900
Ben Guthrod6b47b12013-07-30 08:24:52 -04001901acpi_status acpi_os_prepare_extended_sleep(u8 sleep_state, u32 val_a,
1902 u32 val_b)
1903{
1904 int rc = 0;
1905 if (__acpi_os_prepare_extended_sleep)
1906 rc = __acpi_os_prepare_extended_sleep(sleep_state,
1907 val_a, val_b);
1908 if (rc < 0)
1909 return AE_ERROR;
1910 else if (rc > 0)
1911 return AE_CTRL_SKIP;
1912
1913 return AE_OK;
1914}
1915
1916void acpi_os_set_prepare_extended_sleep(int (*func)(u8 sleep_state,
1917 u32 val_a, u32 val_b))
1918{
1919 __acpi_os_prepare_extended_sleep = func;
1920}