2 * acpi_osl.c - OS-dependent functions ($Revision: 83 $)
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>
10 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
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.
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.
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
26 * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
30 #include <linux/module.h>
31 #include <linux/kernel.h>
32 #include <linux/slab.h>
34 #include <linux/pci.h>
35 #include <linux/interrupt.h>
36 #include <linux/kmod.h>
37 #include <linux/delay.h>
38 #include <linux/dmi.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>
49 #include <asm/uaccess.h>
51 #include <acpi/acpi.h>
52 #include <acpi/acpi_bus.h>
53 #include <acpi/processor.h>
55 #define _COMPONENT ACPI_OS_SERVICES
56 ACPI_MODULE_NAME("osl");
57 #define PREFIX "ACPI: "
59 acpi_osd_exec_callback function
;
61 struct work_struct work
;
64 #ifdef CONFIG_ACPI_CUSTOM_DSDT
65 #include CONFIG_ACPI_CUSTOM_DSDT_FILE
68 #ifdef ENABLE_DEBUGGER
69 #include <linux/kdb.h>
71 /* stuff for debugger support */
73 EXPORT_SYMBOL(acpi_in_debugger
);
75 extern char line_buf
[80];
76 #endif /*ENABLE_DEBUGGER */
78 static unsigned int acpi_irq_irq
;
79 static acpi_osd_handler acpi_irq_handler
;
80 static void *acpi_irq_context
;
81 static struct workqueue_struct
*kacpid_wq
;
82 static struct workqueue_struct
*kacpi_notify_wq
;
84 struct acpi_res_list
{
85 resource_size_t start
;
87 acpi_adr_space_type resource_type
; /* IO port, System memory, ...*/
88 char name
[5]; /* only can have a length of 4 chars, make use of this
89 one instead of res->name, no need to kalloc then */
90 struct list_head resource_list
;
93 static LIST_HEAD(resource_list_head
);
94 static DEFINE_SPINLOCK(acpi_res_lock
);
96 #define OSI_STRING_LENGTH_MAX 64 /* arbitrary */
97 static char osi_additional_string
[OSI_STRING_LENGTH_MAX
];
100 * "Ode to _OSI(Linux)"
102 * osi_linux -- Control response to BIOS _OSI(Linux) query.
104 * As Linux evolves, the features that it supports change.
105 * So an OSI string such as "Linux" is not specific enough
106 * to be useful across multiple versions of Linux. It
107 * doesn't identify any particular feature, interface,
108 * or even any particular version of Linux...
110 * Unfortunately, Linux-2.6.22 and earlier responded "yes"
111 * to a BIOS _OSI(Linux) query. When
112 * a reference mobile BIOS started using it, its use
113 * started to spread to many vendor platforms.
114 * As it is not supportable, we need to halt that spread.
116 * Today, most BIOS references to _OSI(Linux) are noise --
117 * they have no functional effect and are just dead code
118 * carried over from the reference BIOS.
120 * The next most common case is that _OSI(Linux) harms Linux,
121 * usually by causing the BIOS to follow paths that are
122 * not tested during Windows validation.
124 * Finally, there is a short list of platforms
125 * where OSI(Linux) benefits Linux.
127 * In Linux-2.6.23, OSI(Linux) is first disabled by default.
128 * DMI is used to disable the dmesg warning about OSI(Linux)
129 * on platforms where it is known to have no effect.
130 * But a dmesg warning remains for systems where
131 * we do not know if OSI(Linux) is good or bad for the system.
132 * DMI is also used to enable OSI(Linux) for the machines
133 * that are known to need it.
135 * BIOS writers should NOT query _OSI(Linux) on future systems.
136 * It will be ignored by default, and to get Linux to
137 * not ignore it will require a kernel source update to
138 * add a DMI entry, or a boot-time "acpi_osi=Linux" invocation.
140 #define OSI_LINUX_ENABLE 0
142 static struct osi_linux
{
143 unsigned int enable
:1;
145 unsigned int cmdline
:1;
146 unsigned int known
:1;
147 } osi_linux
= { OSI_LINUX_ENABLE
, 0, 0, 0};
149 static void __init
acpi_request_region (struct acpi_generic_address
*addr
,
150 unsigned int length
, char *desc
)
152 struct resource
*res
;
154 if (!addr
->address
|| !length
)
157 if (addr
->space_id
== ACPI_ADR_SPACE_SYSTEM_IO
)
158 res
= request_region(addr
->address
, length
, desc
);
159 else if (addr
->space_id
== ACPI_ADR_SPACE_SYSTEM_MEMORY
)
160 res
= request_mem_region(addr
->address
, length
, desc
);
163 static int __init
acpi_reserve_resources(void)
165 acpi_request_region(&acpi_gbl_FADT
.xpm1a_event_block
, acpi_gbl_FADT
.pm1_event_length
,
166 "ACPI PM1a_EVT_BLK");
168 acpi_request_region(&acpi_gbl_FADT
.xpm1b_event_block
, acpi_gbl_FADT
.pm1_event_length
,
169 "ACPI PM1b_EVT_BLK");
171 acpi_request_region(&acpi_gbl_FADT
.xpm1a_control_block
, acpi_gbl_FADT
.pm1_control_length
,
172 "ACPI PM1a_CNT_BLK");
174 acpi_request_region(&acpi_gbl_FADT
.xpm1b_control_block
, acpi_gbl_FADT
.pm1_control_length
,
175 "ACPI PM1b_CNT_BLK");
177 if (acpi_gbl_FADT
.pm_timer_length
== 4)
178 acpi_request_region(&acpi_gbl_FADT
.xpm_timer_block
, 4, "ACPI PM_TMR");
180 acpi_request_region(&acpi_gbl_FADT
.xpm2_control_block
, acpi_gbl_FADT
.pm2_control_length
,
183 /* Length of GPE blocks must be a non-negative multiple of 2 */
185 if (!(acpi_gbl_FADT
.gpe0_block_length
& 0x1))
186 acpi_request_region(&acpi_gbl_FADT
.xgpe0_block
,
187 acpi_gbl_FADT
.gpe0_block_length
, "ACPI GPE0_BLK");
189 if (!(acpi_gbl_FADT
.gpe1_block_length
& 0x1))
190 acpi_request_region(&acpi_gbl_FADT
.xgpe1_block
,
191 acpi_gbl_FADT
.gpe1_block_length
, "ACPI GPE1_BLK");
195 device_initcall(acpi_reserve_resources
);
197 acpi_status __init
acpi_os_initialize(void)
202 acpi_status
acpi_os_initialize1(void)
204 kacpid_wq
= create_singlethread_workqueue("kacpid");
205 kacpi_notify_wq
= create_singlethread_workqueue("kacpi_notify");
207 BUG_ON(!kacpi_notify_wq
);
211 acpi_status
acpi_os_terminate(void)
213 if (acpi_irq_handler
) {
214 acpi_os_remove_interrupt_handler(acpi_irq_irq
,
218 destroy_workqueue(kacpid_wq
);
219 destroy_workqueue(kacpi_notify_wq
);
224 void acpi_os_printf(const char *fmt
, ...)
228 acpi_os_vprintf(fmt
, args
);
232 void acpi_os_vprintf(const char *fmt
, va_list args
)
234 static char buffer
[512];
236 vsprintf(buffer
, fmt
, args
);
238 #ifdef ENABLE_DEBUGGER
239 if (acpi_in_debugger
) {
240 kdb_printf("%s", buffer
);
242 printk("%s", buffer
);
245 printk("%s", buffer
);
249 acpi_physical_address __init
acpi_os_get_root_pointer(void)
252 if (efi
.acpi20
!= EFI_INVALID_TABLE_ADDR
)
254 else if (efi
.acpi
!= EFI_INVALID_TABLE_ADDR
)
257 printk(KERN_ERR PREFIX
258 "System description tables not found\n");
262 acpi_physical_address pa
= 0;
264 acpi_find_root_pointer(&pa
);
269 void __iomem
*__init_refok
270 acpi_os_map_memory(acpi_physical_address phys
, acpi_size size
)
272 if (phys
> ULONG_MAX
) {
273 printk(KERN_ERR PREFIX
"Cannot map memory that high\n");
276 if (acpi_gbl_permanent_mmap
)
278 * ioremap checks to ensure this is in reserved space
280 return ioremap((unsigned long)phys
, size
);
282 return __acpi_map_table((unsigned long)phys
, size
);
284 EXPORT_SYMBOL_GPL(acpi_os_map_memory
);
286 void acpi_os_unmap_memory(void __iomem
* virt
, acpi_size size
)
288 if (acpi_gbl_permanent_mmap
) {
292 EXPORT_SYMBOL_GPL(acpi_os_unmap_memory
);
294 #ifdef ACPI_FUTURE_USAGE
296 acpi_os_get_physical_address(void *virt
, acpi_physical_address
* phys
)
299 return AE_BAD_PARAMETER
;
301 *phys
= virt_to_phys(virt
);
307 #define ACPI_MAX_OVERRIDE_LEN 100
309 static char acpi_os_name
[ACPI_MAX_OVERRIDE_LEN
];
312 acpi_os_predefined_override(const struct acpi_predefined_names
*init_val
,
313 acpi_string
* new_val
)
315 if (!init_val
|| !new_val
)
316 return AE_BAD_PARAMETER
;
319 if (!memcmp(init_val
->name
, "_OS_", 4) && strlen(acpi_os_name
)) {
320 printk(KERN_INFO PREFIX
"Overriding _OS definition to '%s'\n",
322 *new_val
= acpi_os_name
;
329 acpi_os_table_override(struct acpi_table_header
* existing_table
,
330 struct acpi_table_header
** new_table
)
332 if (!existing_table
|| !new_table
)
333 return AE_BAD_PARAMETER
;
337 #ifdef CONFIG_ACPI_CUSTOM_DSDT
338 if (strncmp(existing_table
->signature
, "DSDT", 4) == 0)
339 *new_table
= (struct acpi_table_header
*)AmlCode
;
341 if (*new_table
!= NULL
) {
342 printk(KERN_WARNING PREFIX
"Override [%4.4s-%8.8s], "
343 "this is unsafe: tainting kernel\n",
344 existing_table
->signature
,
345 existing_table
->oem_table_id
);
346 add_taint(TAINT_OVERRIDDEN_ACPI_TABLE
);
351 static irqreturn_t
acpi_irq(int irq
, void *dev_id
)
355 handled
= (*acpi_irq_handler
) (acpi_irq_context
);
365 acpi_os_install_interrupt_handler(u32 gsi
, acpi_osd_handler handler
,
370 acpi_irq_stats_init();
373 * Ignore the GSI from the core, and use the value in our copy of the
374 * FADT. It may not be the same if an interrupt source override exists
377 gsi
= acpi_gbl_FADT
.sci_interrupt
;
378 if (acpi_gsi_to_irq(gsi
, &irq
) < 0) {
379 printk(KERN_ERR PREFIX
"SCI (ACPI GSI %d) not registered\n",
384 acpi_irq_handler
= handler
;
385 acpi_irq_context
= context
;
386 if (request_irq(irq
, acpi_irq
, IRQF_SHARED
, "acpi", acpi_irq
)) {
387 printk(KERN_ERR PREFIX
"SCI (IRQ%d) allocation failed\n", irq
);
388 return AE_NOT_ACQUIRED
;
395 acpi_status
acpi_os_remove_interrupt_handler(u32 irq
, acpi_osd_handler handler
)
398 free_irq(irq
, acpi_irq
);
399 acpi_irq_handler
= NULL
;
407 * Running in interpreter thread context, safe to sleep
410 void acpi_os_sleep(acpi_integer ms
)
412 schedule_timeout_interruptible(msecs_to_jiffies(ms
));
415 void acpi_os_stall(u32 us
)
423 touch_nmi_watchdog();
429 * Support ACPI 3.0 AML Timer operand
430 * Returns 64-bit free-running, monotonically increasing timer
431 * with 100ns granularity
433 u64
acpi_os_get_timer(void)
438 /* TBD: use HPET if available */
441 #ifdef CONFIG_X86_PM_TIMER
442 /* TBD: default to PM timer if HPET was not available */
445 printk(KERN_ERR PREFIX
"acpi_os_get_timer() TBD\n");
450 acpi_status
acpi_os_read_port(acpi_io_address port
, u32
* value
, u32 width
)
459 *(u8
*) value
= inb(port
);
460 } else if (width
<= 16) {
461 *(u16
*) value
= inw(port
);
462 } else if (width
<= 32) {
463 *(u32
*) value
= inl(port
);
471 EXPORT_SYMBOL(acpi_os_read_port
);
473 acpi_status
acpi_os_write_port(acpi_io_address port
, u32 value
, u32 width
)
477 } else if (width
<= 16) {
479 } else if (width
<= 32) {
488 EXPORT_SYMBOL(acpi_os_write_port
);
491 acpi_os_read_memory(acpi_physical_address phys_addr
, u32
* value
, u32 width
)
494 void __iomem
*virt_addr
;
496 virt_addr
= ioremap(phys_addr
, width
);
502 *(u8
*) value
= readb(virt_addr
);
505 *(u16
*) value
= readw(virt_addr
);
508 *(u32
*) value
= readl(virt_addr
);
520 acpi_os_write_memory(acpi_physical_address phys_addr
, u32 value
, u32 width
)
522 void __iomem
*virt_addr
;
524 virt_addr
= ioremap(phys_addr
, width
);
528 writeb(value
, virt_addr
);
531 writew(value
, virt_addr
);
534 writel(value
, virt_addr
);
546 acpi_os_read_pci_configuration(struct acpi_pci_id
* pci_id
, u32 reg
,
547 u32
*value
, u32 width
)
552 return AE_BAD_PARAMETER
;
568 result
= raw_pci_read(pci_id
->segment
, pci_id
->bus
,
569 PCI_DEVFN(pci_id
->device
, pci_id
->function
),
572 return (result
? AE_ERROR
: AE_OK
);
576 acpi_os_write_pci_configuration(struct acpi_pci_id
* pci_id
, u32 reg
,
577 acpi_integer value
, u32 width
)
595 result
= raw_pci_write(pci_id
->segment
, pci_id
->bus
,
596 PCI_DEVFN(pci_id
->device
, pci_id
->function
),
599 return (result
? AE_ERROR
: AE_OK
);
602 /* TODO: Change code to take advantage of driver model more */
603 static void acpi_os_derive_pci_id_2(acpi_handle rhandle
, /* upper bound */
604 acpi_handle chandle
, /* current node */
605 struct acpi_pci_id
**id
,
606 int *is_bridge
, u8
* bus_number
)
609 struct acpi_pci_id
*pci_id
= *id
;
612 acpi_object_type type
;
614 acpi_get_parent(chandle
, &handle
);
615 if (handle
!= rhandle
) {
616 acpi_os_derive_pci_id_2(rhandle
, handle
, &pci_id
, is_bridge
,
619 status
= acpi_get_type(handle
, &type
);
620 if ((ACPI_FAILURE(status
)) || (type
!= ACPI_TYPE_DEVICE
))
624 acpi_evaluate_integer(handle
, METHOD_NAME__ADR
, NULL
,
626 if (ACPI_SUCCESS(status
)) {
628 pci_id
->device
= ACPI_HIWORD(ACPI_LODWORD(temp
));
629 pci_id
->function
= ACPI_LOWORD(ACPI_LODWORD(temp
));
632 pci_id
->bus
= *bus_number
;
634 /* any nicer way to get bus number of bridge ? */
636 acpi_os_read_pci_configuration(pci_id
, 0x0e, &val
,
638 if (ACPI_SUCCESS(status
)
639 && ((val
& 0x7f) == 1 || (val
& 0x7f) == 2)) {
641 acpi_os_read_pci_configuration(pci_id
, 0x18,
643 if (!ACPI_SUCCESS(status
)) {
644 /* Certainly broken... FIX ME */
650 acpi_os_read_pci_configuration(pci_id
, 0x19,
652 if (ACPI_SUCCESS(status
)) {
661 void acpi_os_derive_pci_id(acpi_handle rhandle
, /* upper bound */
662 acpi_handle chandle
, /* current node */
663 struct acpi_pci_id
**id
)
666 u8 bus_number
= (*id
)->bus
;
668 acpi_os_derive_pci_id_2(rhandle
, chandle
, id
, &is_bridge
, &bus_number
);
671 static void acpi_os_execute_deferred(struct work_struct
*work
)
673 struct acpi_os_dpc
*dpc
= container_of(work
, struct acpi_os_dpc
, work
);
675 printk(KERN_ERR PREFIX
"Invalid (NULL) context\n");
679 dpc
->function(dpc
->context
);
685 /*******************************************************************************
687 * FUNCTION: acpi_os_execute
689 * PARAMETERS: Type - Type of the callback
690 * Function - Function to be executed
691 * Context - Function parameters
695 * DESCRIPTION: Depending on type, either queues function for deferred execution or
696 * immediately executes function on a separate thread.
698 ******************************************************************************/
700 acpi_status
acpi_os_execute(acpi_execute_type type
,
701 acpi_osd_exec_callback function
, void *context
)
703 acpi_status status
= AE_OK
;
704 struct acpi_os_dpc
*dpc
;
705 struct workqueue_struct
*queue
;
706 ACPI_DEBUG_PRINT((ACPI_DB_EXEC
,
707 "Scheduling function [%p(%p)] for deferred execution.\n",
711 return AE_BAD_PARAMETER
;
714 * Allocate/initialize DPC structure. Note that this memory will be
715 * freed by the callee. The kernel handles the work_struct list in a
716 * way that allows us to also free its memory inside the callee.
717 * Because we may want to schedule several tasks with different
718 * parameters we can't use the approach some kernel code uses of
719 * having a static work_struct.
722 dpc
= kmalloc(sizeof(struct acpi_os_dpc
), GFP_ATOMIC
);
724 return_ACPI_STATUS(AE_NO_MEMORY
);
726 dpc
->function
= function
;
727 dpc
->context
= context
;
729 INIT_WORK(&dpc
->work
, acpi_os_execute_deferred
);
730 queue
= (type
== OSL_NOTIFY_HANDLER
) ? kacpi_notify_wq
: kacpid_wq
;
731 if (!queue_work(queue
, &dpc
->work
)) {
732 ACPI_DEBUG_PRINT((ACPI_DB_ERROR
,
733 "Call to queue_work() failed.\n"));
737 return_ACPI_STATUS(status
);
740 EXPORT_SYMBOL(acpi_os_execute
);
742 void acpi_os_wait_events_complete(void *context
)
744 flush_workqueue(kacpid_wq
);
747 EXPORT_SYMBOL(acpi_os_wait_events_complete
);
750 * Allocate the memory for a spinlock and initialize it.
752 acpi_status
acpi_os_create_lock(acpi_spinlock
* handle
)
754 spin_lock_init(*handle
);
760 * Deallocate the memory for a spinlock.
762 void acpi_os_delete_lock(acpi_spinlock handle
)
768 acpi_os_create_semaphore(u32 max_units
, u32 initial_units
, acpi_handle
* handle
)
770 struct semaphore
*sem
= NULL
;
772 sem
= acpi_os_allocate(sizeof(struct semaphore
));
775 memset(sem
, 0, sizeof(struct semaphore
));
777 sema_init(sem
, initial_units
);
779 *handle
= (acpi_handle
*) sem
;
781 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
, "Creating semaphore[%p|%d].\n",
782 *handle
, initial_units
));
788 * TODO: A better way to delete semaphores? Linux doesn't have a
789 * 'delete_semaphore()' function -- may result in an invalid
790 * pointer dereference for non-synchronized consumers. Should
791 * we at least check for blocked threads and signal/cancel them?
794 acpi_status
acpi_os_delete_semaphore(acpi_handle handle
)
796 struct semaphore
*sem
= (struct semaphore
*)handle
;
799 return AE_BAD_PARAMETER
;
801 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
, "Deleting semaphore[%p].\n", handle
));
803 BUG_ON(!list_empty(&sem
->wait_list
));
811 * TODO: Support for units > 1?
813 acpi_status
acpi_os_wait_semaphore(acpi_handle handle
, u32 units
, u16 timeout
)
815 acpi_status status
= AE_OK
;
816 struct semaphore
*sem
= (struct semaphore
*)handle
;
820 if (!sem
|| (units
< 1))
821 return AE_BAD_PARAMETER
;
826 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
, "Waiting for semaphore[%p|%d|%d]\n",
827 handle
, units
, timeout
));
829 if (timeout
== ACPI_WAIT_FOREVER
)
830 jiffies
= MAX_SCHEDULE_TIMEOUT
;
832 jiffies
= msecs_to_jiffies(timeout
);
834 ret
= down_timeout(sem
, jiffies
);
838 if (ACPI_FAILURE(status
)) {
839 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
,
840 "Failed to acquire semaphore[%p|%d|%d], %s",
841 handle
, units
, timeout
,
842 acpi_format_exception(status
)));
844 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
,
845 "Acquired semaphore[%p|%d|%d]", handle
,
853 * TODO: Support for units > 1?
855 acpi_status
acpi_os_signal_semaphore(acpi_handle handle
, u32 units
)
857 struct semaphore
*sem
= (struct semaphore
*)handle
;
859 if (!sem
|| (units
< 1))
860 return AE_BAD_PARAMETER
;
865 ACPI_DEBUG_PRINT((ACPI_DB_MUTEX
, "Signaling semaphore[%p|%d]\n", handle
,
873 #ifdef ACPI_FUTURE_USAGE
874 u32
acpi_os_get_line(char *buffer
)
877 #ifdef ENABLE_DEBUGGER
878 if (acpi_in_debugger
) {
881 kdb_read(buffer
, sizeof(line_buf
));
883 /* remove the CR kdb includes */
884 chars
= strlen(buffer
) - 1;
885 buffer
[chars
] = '\0';
891 #endif /* ACPI_FUTURE_USAGE */
893 acpi_status
acpi_os_signal(u32 function
, void *info
)
896 case ACPI_SIGNAL_FATAL
:
897 printk(KERN_ERR PREFIX
"Fatal opcode executed\n");
899 case ACPI_SIGNAL_BREAKPOINT
:
902 * ACPI spec. says to treat it as a NOP unless
903 * you are debugging. So if/when we integrate
904 * AML debugger into the kernel debugger its
905 * hook will go here. But until then it is
906 * not useful to print anything on breakpoints.
916 static int __init
acpi_os_name_setup(char *str
)
918 char *p
= acpi_os_name
;
919 int count
= ACPI_MAX_OVERRIDE_LEN
- 1;
924 for (; count
-- && str
&& *str
; str
++) {
925 if (isalnum(*str
) || *str
== ' ' || *str
== ':')
927 else if (*str
== '\'' || *str
== '"')
938 __setup("acpi_os_name=", acpi_os_name_setup
);
940 static void __init
set_osi_linux(unsigned int enable
)
942 if (osi_linux
.enable
!= enable
) {
943 osi_linux
.enable
= enable
;
944 printk(KERN_NOTICE PREFIX
"%sed _OSI(Linux)\n",
945 enable
? "Add": "Delet");
950 static void __init
acpi_cmdline_osi_linux(unsigned int enable
)
952 osi_linux
.cmdline
= 1; /* cmdline set the default */
953 set_osi_linux(enable
);
958 void __init
acpi_dmi_osi_linux(int enable
, const struct dmi_system_id
*d
)
960 osi_linux
.dmi
= 1; /* DMI knows that this box asks OSI(Linux) */
962 printk(KERN_NOTICE PREFIX
"DMI detected: %s\n", d
->ident
);
967 osi_linux
.known
= 1; /* DMI knows which OSI(Linux) default needed */
969 set_osi_linux(enable
);
975 * Modify the list of "OS Interfaces" reported to BIOS via _OSI
977 * empty string disables _OSI
978 * string starting with '!' disables that string
979 * otherwise string is added to list, augmenting built-in strings
981 int __init
acpi_osi_setup(char *str
)
983 if (str
== NULL
|| *str
== '\0') {
984 printk(KERN_INFO PREFIX
"_OSI method disabled\n");
985 acpi_gbl_create_osi_method
= FALSE
;
986 } else if (!strcmp("!Linux", str
)) {
987 acpi_cmdline_osi_linux(0); /* !enable */
988 } else if (*str
== '!') {
989 if (acpi_osi_invalidate(++str
) == AE_OK
)
990 printk(KERN_INFO PREFIX
"Deleted _OSI(%s)\n", str
);
991 } else if (!strcmp("Linux", str
)) {
992 acpi_cmdline_osi_linux(1); /* enable */
993 } else if (*osi_additional_string
== '\0') {
994 strncpy(osi_additional_string
, str
, OSI_STRING_LENGTH_MAX
);
995 printk(KERN_INFO PREFIX
"Added _OSI(%s)\n", str
);
1001 __setup("acpi_osi=", acpi_osi_setup
);
1003 /* enable serialization to combat AE_ALREADY_EXISTS errors */
1004 static int __init
acpi_serialize_setup(char *str
)
1006 printk(KERN_INFO PREFIX
"serialize enabled\n");
1008 acpi_gbl_all_methods_serialized
= TRUE
;
1013 __setup("acpi_serialize", acpi_serialize_setup
);
1016 * Wake and Run-Time GPES are expected to be separate.
1017 * We disable wake-GPEs at run-time to prevent spurious
1020 * However, if a system exists that shares Wake and
1021 * Run-time events on the same GPE this flag is available
1022 * to tell Linux to keep the wake-time GPEs enabled at run-time.
1024 static int __init
acpi_wake_gpes_always_on_setup(char *str
)
1026 printk(KERN_INFO PREFIX
"wake GPEs not disabled\n");
1028 acpi_gbl_leave_wake_gpes_disabled
= FALSE
;
1033 __setup("acpi_wake_gpes_always_on", acpi_wake_gpes_always_on_setup
);
1035 /* Check of resource interference between native drivers and ACPI
1036 * OperationRegions (SystemIO and System Memory only).
1037 * IO ports and memory declared in ACPI might be used by the ACPI subsystem
1038 * in arbitrary AML code and can interfere with legacy drivers.
1039 * acpi_enforce_resources= can be set to:
1042 * -> further driver trying to access the resources will not load
1043 * - lax (default) (1)
1044 * -> further driver trying to access the resources will load, but you
1045 * get a system message that something might go wrong...
1048 * -> ACPI Operation Region resources will not be registered
1051 #define ENFORCE_RESOURCES_STRICT 2
1052 #define ENFORCE_RESOURCES_LAX 1
1053 #define ENFORCE_RESOURCES_NO 0
1055 static unsigned int acpi_enforce_resources
= ENFORCE_RESOURCES_LAX
;
1057 static int __init
acpi_enforce_resources_setup(char *str
)
1059 if (str
== NULL
|| *str
== '\0')
1062 if (!strcmp("strict", str
))
1063 acpi_enforce_resources
= ENFORCE_RESOURCES_STRICT
;
1064 else if (!strcmp("lax", str
))
1065 acpi_enforce_resources
= ENFORCE_RESOURCES_LAX
;
1066 else if (!strcmp("no", str
))
1067 acpi_enforce_resources
= ENFORCE_RESOURCES_NO
;
1072 __setup("acpi_enforce_resources=", acpi_enforce_resources_setup
);
1074 /* Check for resource conflicts between ACPI OperationRegions and native
1076 int acpi_check_resource_conflict(struct resource
*res
)
1078 struct acpi_res_list
*res_list_elem
;
1082 if (acpi_enforce_resources
== ENFORCE_RESOURCES_NO
)
1084 if (!(res
->flags
& IORESOURCE_IO
) && !(res
->flags
& IORESOURCE_MEM
))
1087 ioport
= res
->flags
& IORESOURCE_IO
;
1089 spin_lock(&acpi_res_lock
);
1090 list_for_each_entry(res_list_elem
, &resource_list_head
,
1092 if (ioport
&& (res_list_elem
->resource_type
1093 != ACPI_ADR_SPACE_SYSTEM_IO
))
1095 if (!ioport
&& (res_list_elem
->resource_type
1096 != ACPI_ADR_SPACE_SYSTEM_MEMORY
))
1099 if (res
->end
< res_list_elem
->start
1100 || res_list_elem
->end
< res
->start
)
1105 spin_unlock(&acpi_res_lock
);
1108 if (acpi_enforce_resources
!= ENFORCE_RESOURCES_NO
) {
1109 printk("%sACPI: %s resource %s [0x%llx-0x%llx]"
1110 " conflicts with ACPI region %s"
1111 " [0x%llx-0x%llx]\n",
1112 acpi_enforce_resources
== ENFORCE_RESOURCES_LAX
1113 ? KERN_WARNING
: KERN_ERR
,
1114 ioport
? "I/O" : "Memory", res
->name
,
1115 (long long) res
->start
, (long long) res
->end
,
1116 res_list_elem
->name
,
1117 (long long) res_list_elem
->start
,
1118 (long long) res_list_elem
->end
);
1119 printk(KERN_INFO
"ACPI: Device needs an ACPI driver\n");
1121 if (acpi_enforce_resources
== ENFORCE_RESOURCES_STRICT
)
1126 EXPORT_SYMBOL(acpi_check_resource_conflict
);
1128 int acpi_check_region(resource_size_t start
, resource_size_t n
,
1131 struct resource res
= {
1133 .end
= start
+ n
- 1,
1135 .flags
= IORESOURCE_IO
,
1138 return acpi_check_resource_conflict(&res
);
1140 EXPORT_SYMBOL(acpi_check_region
);
1142 int acpi_check_mem_region(resource_size_t start
, resource_size_t n
,
1145 struct resource res
= {
1147 .end
= start
+ n
- 1,
1149 .flags
= IORESOURCE_MEM
,
1152 return acpi_check_resource_conflict(&res
);
1155 EXPORT_SYMBOL(acpi_check_mem_region
);
1158 * Acquire a spinlock.
1160 * handle is a pointer to the spinlock_t.
1163 acpi_cpu_flags
acpi_os_acquire_lock(acpi_spinlock lockp
)
1165 acpi_cpu_flags flags
;
1166 spin_lock_irqsave(lockp
, flags
);
1171 * Release a spinlock. See above.
1174 void acpi_os_release_lock(acpi_spinlock lockp
, acpi_cpu_flags flags
)
1176 spin_unlock_irqrestore(lockp
, flags
);
1179 #ifndef ACPI_USE_LOCAL_CACHE
1181 /*******************************************************************************
1183 * FUNCTION: acpi_os_create_cache
1185 * PARAMETERS: name - Ascii name for the cache
1186 * size - Size of each cached object
1187 * depth - Maximum depth of the cache (in objects) <ignored>
1188 * cache - Where the new cache object is returned
1192 * DESCRIPTION: Create a cache object
1194 ******************************************************************************/
1197 acpi_os_create_cache(char *name
, u16 size
, u16 depth
, acpi_cache_t
** cache
)
1199 *cache
= kmem_cache_create(name
, size
, 0, 0, NULL
);
1206 /*******************************************************************************
1208 * FUNCTION: acpi_os_purge_cache
1210 * PARAMETERS: Cache - Handle to cache object
1214 * DESCRIPTION: Free all objects within the requested cache.
1216 ******************************************************************************/
1218 acpi_status
acpi_os_purge_cache(acpi_cache_t
* cache
)
1220 kmem_cache_shrink(cache
);
1224 /*******************************************************************************
1226 * FUNCTION: acpi_os_delete_cache
1228 * PARAMETERS: Cache - Handle to cache object
1232 * DESCRIPTION: Free all objects within the requested cache and delete the
1235 ******************************************************************************/
1237 acpi_status
acpi_os_delete_cache(acpi_cache_t
* cache
)
1239 kmem_cache_destroy(cache
);
1243 /*******************************************************************************
1245 * FUNCTION: acpi_os_release_object
1247 * PARAMETERS: Cache - Handle to cache object
1248 * Object - The object to be released
1252 * DESCRIPTION: Release an object to the specified cache. If cache is full,
1253 * the object is deleted.
1255 ******************************************************************************/
1257 acpi_status
acpi_os_release_object(acpi_cache_t
* cache
, void *object
)
1259 kmem_cache_free(cache
, object
);
1264 * acpi_dmi_dump - dump DMI slots needed for blacklist entry
1266 * Returns 0 on success
1268 static int acpi_dmi_dump(void)
1274 printk(KERN_NOTICE PREFIX
"DMI System Vendor: %s\n",
1275 dmi_get_system_info(DMI_SYS_VENDOR
));
1276 printk(KERN_NOTICE PREFIX
"DMI Product Name: %s\n",
1277 dmi_get_system_info(DMI_PRODUCT_NAME
));
1278 printk(KERN_NOTICE PREFIX
"DMI Product Version: %s\n",
1279 dmi_get_system_info(DMI_PRODUCT_VERSION
));
1280 printk(KERN_NOTICE PREFIX
"DMI Board Name: %s\n",
1281 dmi_get_system_info(DMI_BOARD_NAME
));
1282 printk(KERN_NOTICE PREFIX
"DMI BIOS Vendor: %s\n",
1283 dmi_get_system_info(DMI_BIOS_VENDOR
));
1284 printk(KERN_NOTICE PREFIX
"DMI BIOS Date: %s\n",
1285 dmi_get_system_info(DMI_BIOS_DATE
));
1291 /******************************************************************************
1293 * FUNCTION: acpi_os_validate_interface
1295 * PARAMETERS: interface - Requested interface to be validated
1297 * RETURN: AE_OK if interface is supported, AE_SUPPORT otherwise
1299 * DESCRIPTION: Match an interface string to the interfaces supported by the
1300 * host. Strings originate from an AML call to the _OSI method.
1302 *****************************************************************************/
1305 acpi_os_validate_interface (char *interface
)
1307 if (!strncmp(osi_additional_string
, interface
, OSI_STRING_LENGTH_MAX
))
1309 if (!strcmp("Linux", interface
)) {
1311 printk(KERN_NOTICE PREFIX
1312 "BIOS _OSI(Linux) query %s%s\n",
1313 osi_linux
.enable
? "honored" : "ignored",
1314 osi_linux
.cmdline
? " via cmdline" :
1315 osi_linux
.dmi
? " via DMI" : "");
1317 if (!osi_linux
.dmi
) {
1318 if (acpi_dmi_dump())
1319 printk(KERN_NOTICE PREFIX
1320 "[please extract dmidecode output]\n");
1321 printk(KERN_NOTICE PREFIX
1322 "Please send DMI info above to "
1323 "linux-acpi@vger.kernel.org\n");
1325 if (!osi_linux
.known
&& !osi_linux
.cmdline
) {
1326 printk(KERN_NOTICE PREFIX
1327 "If \"acpi_osi=%sLinux\" works better, "
1328 "please notify linux-acpi@vger.kernel.org\n",
1329 osi_linux
.enable
? "!" : "");
1332 if (osi_linux
.enable
)
1338 /******************************************************************************
1340 * FUNCTION: acpi_os_validate_address
1342 * PARAMETERS: space_id - ACPI space ID
1343 * address - Physical address
1344 * length - Address length
1346 * RETURN: AE_OK if address/length is valid for the space_id. Otherwise,
1347 * should return AE_AML_ILLEGAL_ADDRESS.
1349 * DESCRIPTION: Validate a system address via the host OS. Used to validate
1350 * the addresses accessed by AML operation regions.
1352 *****************************************************************************/
1355 acpi_os_validate_address (
1357 acpi_physical_address address
,
1361 struct acpi_res_list
*res
;
1362 if (acpi_enforce_resources
== ENFORCE_RESOURCES_NO
)
1366 case ACPI_ADR_SPACE_SYSTEM_IO
:
1367 case ACPI_ADR_SPACE_SYSTEM_MEMORY
:
1368 /* Only interference checks against SystemIO and SytemMemory
1370 res
= kzalloc(sizeof(struct acpi_res_list
), GFP_KERNEL
);
1373 /* ACPI names are fixed to 4 bytes, still better use strlcpy */
1374 strlcpy(res
->name
, name
, 5);
1375 res
->start
= address
;
1376 res
->end
= address
+ length
- 1;
1377 res
->resource_type
= space_id
;
1378 spin_lock(&acpi_res_lock
);
1379 list_add(&res
->resource_list
, &resource_list_head
);
1380 spin_unlock(&acpi_res_lock
);
1381 pr_debug("Added %s resource: start: 0x%llx, end: 0x%llx, "
1382 "name: %s\n", (space_id
== ACPI_ADR_SPACE_SYSTEM_IO
)
1383 ? "SystemIO" : "System Memory",
1384 (unsigned long long)res
->start
,
1385 (unsigned long long)res
->end
,
1388 case ACPI_ADR_SPACE_PCI_CONFIG
:
1389 case ACPI_ADR_SPACE_EC
:
1390 case ACPI_ADR_SPACE_SMBUS
:
1391 case ACPI_ADR_SPACE_CMOS
:
1392 case ACPI_ADR_SPACE_PCI_BAR_TARGET
:
1393 case ACPI_ADR_SPACE_DATA_TABLE
:
1394 case ACPI_ADR_SPACE_FIXED_HARDWARE
: