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authorRafael J. Wysocki <rjw@sisk.pl>2008-01-08 00:05:21 +0100
committerLen Brown <len.brown@intel.com>2008-02-01 18:30:56 -0500
commitc95d47a868f35cd47643d116a3c680cdaa954df8 (patch)
tree36e3b820c8bb0c1c962029ce5a28c6e3251443a9 /drivers/acpi/hardware
parentc697eecebc6cfc0b393afea3c4ff1a5041526ad1 (diff)
ACPI: Separate invocations of _GTS and _BFS from _PTS and _WAK
The execution of ACPI global control methods _GTS and _BFS is currently tied to the preparation to enter a sleep state and to the leaving of the sleep state, respectively. However, these functions are called before disabling the nonboot CPUs and after enabling them, respectively (in fact, on ACPI 1.0x systems the first of them ought to be called before suspending devices), while according to the ACPI specification, _GTS is to be executed right prior to entering the system sleep state and _BFS is to be executed right after the platfor firmware has returned control to the OS on wake up. Move the execution of _GTS and _BFS to the right places. Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl> Acked-by: Pavel Machek <pavel@suse.cz> Signed-off-by: Len Brown <len.brown@intel.com>
Diffstat (limited to 'drivers/acpi/hardware')
-rw-r--r--drivers/acpi/hardware/hwsleep.c75
1 files changed, 57 insertions, 18 deletions
diff --git a/drivers/acpi/hardware/hwsleep.c b/drivers/acpi/hardware/hwsleep.c
index 81b248429703..13c93a13785e 100644
--- a/drivers/acpi/hardware/hwsleep.c
+++ b/drivers/acpi/hardware/hwsleep.c
@@ -192,18 +192,13 @@ acpi_status acpi_enter_sleep_state_prep(u8 sleep_state)
arg.type = ACPI_TYPE_INTEGER;
arg.integer.value = sleep_state;
- /* Run the _PTS and _GTS methods */
+ /* Run the _PTS method */
status = acpi_evaluate_object(NULL, METHOD_NAME__PTS, &arg_list, NULL);
if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
return_ACPI_STATUS(status);
}
- status = acpi_evaluate_object(NULL, METHOD_NAME__GTS, &arg_list, NULL);
- if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
- return_ACPI_STATUS(status);
- }
-
/* Setup the argument to _SST */
switch (sleep_state) {
@@ -262,6 +257,8 @@ acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state)
struct acpi_bit_register_info *sleep_type_reg_info;
struct acpi_bit_register_info *sleep_enable_reg_info;
u32 in_value;
+ struct acpi_object_list arg_list;
+ union acpi_object arg;
acpi_status status;
ACPI_FUNCTION_TRACE(acpi_enter_sleep_state);
@@ -307,6 +304,18 @@ acpi_status asmlinkage acpi_enter_sleep_state(u8 sleep_state)
return_ACPI_STATUS(status);
}
+ /* Execute the _GTS method */
+
+ arg_list.count = 1;
+ arg_list.pointer = &arg;
+ arg.type = ACPI_TYPE_INTEGER;
+ arg.integer.value = sleep_state;
+
+ status = acpi_evaluate_object(NULL, METHOD_NAME__GTS, &arg_list, NULL);
+ if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
+ return_ACPI_STATUS(status);
+ }
+
/* Get current value of PM1A control */
status = acpi_hw_register_read(ACPI_REGISTER_PM1_CONTROL, &PM1Acontrol);
@@ -473,17 +482,18 @@ ACPI_EXPORT_SYMBOL(acpi_enter_sleep_state_s4bios)
/*******************************************************************************
*
- * FUNCTION: acpi_leave_sleep_state
+ * FUNCTION: acpi_leave_sleep_state_prep
*
- * PARAMETERS: sleep_state - Which sleep state we just exited
+ * PARAMETERS: sleep_state - Which sleep state we are exiting
*
* RETURN: Status
*
- * DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep
- * Called with interrupts ENABLED.
+ * DESCRIPTION: Perform the first state of OS-independent ACPI cleanup after a
+ * sleep.
+ * Called with interrupts DISABLED.
*
******************************************************************************/
-acpi_status acpi_leave_sleep_state(u8 sleep_state)
+acpi_status acpi_leave_sleep_state_prep(u8 sleep_state)
{
struct acpi_object_list arg_list;
union acpi_object arg;
@@ -493,7 +503,7 @@ acpi_status acpi_leave_sleep_state(u8 sleep_state)
u32 PM1Acontrol;
u32 PM1Bcontrol;
- ACPI_FUNCTION_TRACE(acpi_leave_sleep_state);
+ ACPI_FUNCTION_TRACE(acpi_leave_sleep_state_prep);
/*
* Set SLP_TYPE and SLP_EN to state S0.
@@ -540,6 +550,41 @@ acpi_status acpi_leave_sleep_state(u8 sleep_state)
}
}
+ /* Execute the _BFS method */
+
+ arg_list.count = 1;
+ arg_list.pointer = &arg;
+ arg.type = ACPI_TYPE_INTEGER;
+ arg.integer.value = sleep_state;
+
+ status = acpi_evaluate_object(NULL, METHOD_NAME__BFS, &arg_list, NULL);
+ if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
+ ACPI_EXCEPTION((AE_INFO, status, "During Method _BFS"));
+ }
+
+ return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_leave_sleep_state
+ *
+ * PARAMETERS: sleep_state - Which sleep state we just exited
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Perform OS-independent ACPI cleanup after a sleep
+ * Called with interrupts ENABLED.
+ *
+ ******************************************************************************/
+acpi_status acpi_leave_sleep_state(u8 sleep_state)
+{
+ struct acpi_object_list arg_list;
+ union acpi_object arg;
+ acpi_status status;
+
+ ACPI_FUNCTION_TRACE(acpi_leave_sleep_state);
+
/* Ensure enter_sleep_state_prep -> enter_sleep_state ordering */
acpi_gbl_sleep_type_a = ACPI_SLEEP_TYPE_INVALID;
@@ -558,12 +603,6 @@ acpi_status acpi_leave_sleep_state(u8 sleep_state)
ACPI_EXCEPTION((AE_INFO, status, "During Method _SST"));
}
- arg.integer.value = sleep_state;
- status = acpi_evaluate_object(NULL, METHOD_NAME__BFS, &arg_list, NULL);
- if (ACPI_FAILURE(status) && status != AE_NOT_FOUND) {
- ACPI_EXCEPTION((AE_INFO, status, "During Method _BFS"));
- }
-
/*
* GPEs must be enabled before _WAK is called as GPEs
* might get fired there