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ACPI: Use GPE reference counting to support shared GPEs 

ACPI GPEs may map to multiple devices.  The current GPE interface
only provides a mechanism for enabling and disabling GPEs, making
it difficult to change the state of GPEs at runtime without extensive
cooperation between devices.

Add an API to allow devices to indicate whether or not they want
their device's GPE to be enabled for both runtime and wakeup events.

Remove the old GPE type handling entirely, which gets rid of various
quirks, like the implicit disabling with GPE type setting. This
requires a small amount of rework in order to ensure that non-wake
GPEs are enabled by default to preserve existing behaviour.

Based on patches from Matthew Garrett <mjg@redhat.com>.

Signed-off-by: Matthew Garrett <mjg@redhat.com>
Signed-off-by: Rafael J. Wysocki <rjw@sisk.pl>
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
This commit is contained in:
Rafael J. Wysocki 2010-02-17 23:41:07 +01:00 committed by Jesse Barnes
parent c39fae1416
commit 9630bdd9b1
13 changed files with 189 additions and 326 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/acpi/acpica/acevents.h
View File

@ -76,8 +76,7 @@ acpi_ev_queue_notify_request(struct acpi_namespace_node *node,
* evgpe - GPE handling and dispatch * evgpe - GPE handling and dispatch
*/ */
acpi_status acpi_status
acpi_ev_update_gpe_enable_masks(struct acpi_gpe_event_info *gpe_event_info, acpi_ev_update_gpe_enable_masks(struct acpi_gpe_event_info *gpe_event_info);
u8 type);
acpi_status acpi_status
acpi_ev_enable_gpe(struct acpi_gpe_event_info *gpe_event_info, acpi_ev_enable_gpe(struct acpi_gpe_event_info *gpe_event_info,
@ -121,9 +120,6 @@ acpi_ev_gpe_dispatch(struct acpi_gpe_event_info *gpe_event_info,
u32 acpi_ev_gpe_detect(struct acpi_gpe_xrupt_info *gpe_xrupt_list); u32 acpi_ev_gpe_detect(struct acpi_gpe_xrupt_info *gpe_xrupt_list);
acpi_status
acpi_ev_set_gpe_type(struct acpi_gpe_event_info *gpe_event_info, u8 type);
acpi_status acpi_status
acpi_ev_check_for_wake_only_gpe(struct acpi_gpe_event_info *gpe_event_info); acpi_ev_check_for_wake_only_gpe(struct acpi_gpe_event_info *gpe_event_info);

2
drivers/acpi/acpica/aclocal.h
View File

@ -426,6 +426,8 @@ struct acpi_gpe_event_info {
struct acpi_gpe_register_info *register_info; /* Backpointer to register info */ struct acpi_gpe_register_info *register_info; /* Backpointer to register info */
u8 flags; /* Misc info about this GPE */ u8 flags; /* Misc info about this GPE */
u8 gpe_number; /* This GPE */ u8 gpe_number; /* This GPE */
u8 runtime_count;
u8 wakeup_count;
}; };
/* Information about a GPE register pair, one per each status/enable pair in an array */ /* Information about a GPE register pair, one per each status/enable pair in an array */

153
drivers/acpi/acpica/evgpe.c
View File

@ -52,56 +52,11 @@ ACPI_MODULE_NAME("evgpe")
/* Local prototypes */ /* Local prototypes */
static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context); static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context);
/*******************************************************************************
*
* FUNCTION: acpi_ev_set_gpe_type
*
* PARAMETERS: gpe_event_info - GPE to set
* Type - New type
*
* RETURN: Status
*
* DESCRIPTION: Sets the new type for the GPE (wake, run, or wake/run)
*
******************************************************************************/
acpi_status
acpi_ev_set_gpe_type(struct acpi_gpe_event_info *gpe_event_info, u8 type)
{
acpi_status status;
ACPI_FUNCTION_TRACE(ev_set_gpe_type);
/* Validate type and update register enable masks */
switch (type) {
case ACPI_GPE_TYPE_WAKE:
case ACPI_GPE_TYPE_RUNTIME:
case ACPI_GPE_TYPE_WAKE_RUN:
break;
default:
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
/* Disable the GPE if currently enabled */
status = acpi_ev_disable_gpe(gpe_event_info);
/* Clear the type bits and insert the new Type */
gpe_event_info->flags &= ~ACPI_GPE_TYPE_MASK;
gpe_event_info->flags |= type;
return_ACPI_STATUS(status);
}
/******************************************************************************* /*******************************************************************************
* *
* FUNCTION: acpi_ev_update_gpe_enable_masks * FUNCTION: acpi_ev_update_gpe_enable_masks
* *
* PARAMETERS: gpe_event_info - GPE to update * PARAMETERS: gpe_event_info - GPE to update
* Type - What to do: ACPI_GPE_DISABLE or
* ACPI_GPE_ENABLE
* *
* RETURN: Status * RETURN: Status
* *
@ -110,8 +65,7 @@ acpi_ev_set_gpe_type(struct acpi_gpe_event_info *gpe_event_info, u8 type)
******************************************************************************/ ******************************************************************************/
acpi_status acpi_status
acpi_ev_update_gpe_enable_masks(struct acpi_gpe_event_info *gpe_event_info, acpi_ev_update_gpe_enable_masks(struct acpi_gpe_event_info *gpe_event_info)
u8 type)
{ {
struct acpi_gpe_register_info *gpe_register_info; struct acpi_gpe_register_info *gpe_register_info;
u8 register_bit; u8 register_bit;
@ -127,37 +81,14 @@ acpi_ev_update_gpe_enable_masks(struct acpi_gpe_event_info *gpe_event_info,
(1 << (1 <<
(gpe_event_info->gpe_number - gpe_register_info->base_gpe_number)); (gpe_event_info->gpe_number - gpe_register_info->base_gpe_number));
/* 1) Disable case. Simply clear all enable bits */ ACPI_CLEAR_BIT(gpe_register_info->enable_for_wake, register_bit);
ACPI_CLEAR_BIT(gpe_register_info->enable_for_run, register_bit);
if (type == ACPI_GPE_DISABLE) { if (gpe_event_info->runtime_count)
ACPI_CLEAR_BIT(gpe_register_info->enable_for_wake,
register_bit);
ACPI_CLEAR_BIT(gpe_register_info->enable_for_run, register_bit);
return_ACPI_STATUS(AE_OK);
}
/* 2) Enable case. Set/Clear the appropriate enable bits */
switch (gpe_event_info->flags & ACPI_GPE_TYPE_MASK) {
case ACPI_GPE_TYPE_WAKE:
ACPI_SET_BIT(gpe_register_info->enable_for_wake, register_bit);
ACPI_CLEAR_BIT(gpe_register_info->enable_for_run, register_bit);
break;
case ACPI_GPE_TYPE_RUNTIME:
ACPI_CLEAR_BIT(gpe_register_info->enable_for_wake,
register_bit);
ACPI_SET_BIT(gpe_register_info->enable_for_run, register_bit); ACPI_SET_BIT(gpe_register_info->enable_for_run, register_bit);
break;
case ACPI_GPE_TYPE_WAKE_RUN: if (gpe_event_info->wakeup_count)
ACPI_SET_BIT(gpe_register_info->enable_for_wake, register_bit); ACPI_SET_BIT(gpe_register_info->enable_for_wake, register_bit);
ACPI_SET_BIT(gpe_register_info->enable_for_run, register_bit);
break;
default:
return_ACPI_STATUS(AE_BAD_PARAMETER);
}
return_ACPI_STATUS(AE_OK); return_ACPI_STATUS(AE_OK);
} }
@ -186,47 +117,20 @@ acpi_ev_enable_gpe(struct acpi_gpe_event_info *gpe_event_info,
/* Make sure HW enable masks are updated */ /* Make sure HW enable masks are updated */
status = status = acpi_ev_update_gpe_enable_masks(gpe_event_info);
acpi_ev_update_gpe_enable_masks(gpe_event_info, ACPI_GPE_ENABLE); if (ACPI_FAILURE(status))
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status); return_ACPI_STATUS(status);
}
/* Mark wake-enabled or HW enable, or both */ /* Mark wake-enabled or HW enable, or both */
switch (gpe_event_info->flags & ACPI_GPE_TYPE_MASK) { if (gpe_event_info->runtime_count && write_to_hardware) {
case ACPI_GPE_TYPE_WAKE: /* Clear the GPE (of stale events), then enable it */
status = acpi_hw_clear_gpe(gpe_event_info);
if (ACPI_FAILURE(status))
return_ACPI_STATUS(status);
ACPI_SET_BIT(gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED); /* Enable the requested runtime GPE */
break; status = acpi_hw_write_gpe_enable_reg(gpe_event_info);
case ACPI_GPE_TYPE_WAKE_RUN:
ACPI_SET_BIT(gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED);
/*lint -fallthrough */
case ACPI_GPE_TYPE_RUNTIME:
ACPI_SET_BIT(gpe_event_info->flags, ACPI_GPE_RUN_ENABLED);
if (write_to_hardware) {
/* Clear the GPE (of stale events), then enable it */
status = acpi_hw_clear_gpe(gpe_event_info);
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status);
}
/* Enable the requested runtime GPE */
status = acpi_hw_write_gpe_enable_reg(gpe_event_info);
}
break;
default:
return_ACPI_STATUS(AE_BAD_PARAMETER);
} }
return_ACPI_STATUS(AE_OK); return_ACPI_STATUS(AE_OK);
@ -252,34 +156,9 @@ acpi_status acpi_ev_disable_gpe(struct acpi_gpe_event_info *gpe_event_info)
/* Make sure HW enable masks are updated */ /* Make sure HW enable masks are updated */
status = status = acpi_ev_update_gpe_enable_masks(gpe_event_info);
acpi_ev_update_gpe_enable_masks(gpe_event_info, ACPI_GPE_DISABLE); if (ACPI_FAILURE(status))
if (ACPI_FAILURE(status)) {
return_ACPI_STATUS(status); return_ACPI_STATUS(status);
}
/* Clear the appropriate enabled flags for this GPE */
switch (gpe_event_info->flags & ACPI_GPE_TYPE_MASK) {
case ACPI_GPE_TYPE_WAKE:
ACPI_CLEAR_BIT(gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED);
break;
case ACPI_GPE_TYPE_WAKE_RUN:
ACPI_CLEAR_BIT(gpe_event_info->flags, ACPI_GPE_WAKE_ENABLED);
/* fallthrough */
case ACPI_GPE_TYPE_RUNTIME:
/* Disable the requested runtime GPE */
ACPI_CLEAR_BIT(gpe_event_info->flags, ACPI_GPE_RUN_ENABLED);
break;
default:
break;
}
/* /*
* Even if we don't know the GPE type, make sure that we always * Even if we don't know the GPE type, make sure that we always

87
drivers/acpi/acpica/evgpeblk.c
View File

@ -258,7 +258,6 @@ acpi_ev_save_method_info(acpi_handle obj_handle,
u32 gpe_number; u32 gpe_number;
char name[ACPI_NAME_SIZE + 1]; char name[ACPI_NAME_SIZE + 1];
u8 type; u8 type;
acpi_status status;
ACPI_FUNCTION_TRACE(ev_save_method_info); ACPI_FUNCTION_TRACE(ev_save_method_info);
@ -325,26 +324,20 @@ acpi_ev_save_method_info(acpi_handle obj_handle,
/* /*
* Now we can add this information to the gpe_event_info block for use * Now we can add this information to the gpe_event_info block for use
* during dispatch of this GPE. Default type is RUNTIME, although this may * during dispatch of this GPE.
* change when the _PRW methods are executed later.
*/ */
gpe_event_info = gpe_event_info =
&gpe_block->event_info[gpe_number - gpe_block->block_base_number]; &gpe_block->event_info[gpe_number - gpe_block->block_base_number];
gpe_event_info->flags = (u8) gpe_event_info->flags = (u8) (type | ACPI_GPE_DISPATCH_METHOD);
(type | ACPI_GPE_DISPATCH_METHOD | ACPI_GPE_TYPE_RUNTIME);
gpe_event_info->dispatch.method_node = gpe_event_info->dispatch.method_node =
(struct acpi_namespace_node *)obj_handle; (struct acpi_namespace_node *)obj_handle;
/* Update enable mask, but don't enable the HW GPE as of yet */
status = acpi_ev_enable_gpe(gpe_event_info, FALSE);
ACPI_DEBUG_PRINT((ACPI_DB_LOAD, ACPI_DEBUG_PRINT((ACPI_DB_LOAD,
"Registered GPE method %s as GPE number 0x%.2X\n", "Registered GPE method %s as GPE number 0x%.2X\n",
name, gpe_number)); name, gpe_number));
return_ACPI_STATUS(status); return_ACPI_STATUS(AE_OK);
} }
/******************************************************************************* /*******************************************************************************
@ -454,20 +447,7 @@ acpi_ev_match_prw_and_gpe(acpi_handle obj_handle,
gpe_block-> gpe_block->
block_base_number]; block_base_number];
/* Mark GPE for WAKE-ONLY but WAKE_DISABLED */ gpe_event_info->flags |= ACPI_GPE_CAN_WAKE;
gpe_event_info->flags &=
~(ACPI_GPE_WAKE_ENABLED | ACPI_GPE_RUN_ENABLED);
status =
acpi_ev_set_gpe_type(gpe_event_info, ACPI_GPE_TYPE_WAKE);
if (ACPI_FAILURE(status)) {
goto cleanup;
}
status =
acpi_ev_update_gpe_enable_masks(gpe_event_info,
ACPI_GPE_DISABLE);
} }
cleanup: cleanup:
@ -989,7 +969,6 @@ acpi_status
acpi_ev_initialize_gpe_block(struct acpi_namespace_node *gpe_device, acpi_ev_initialize_gpe_block(struct acpi_namespace_node *gpe_device,
struct acpi_gpe_block_info *gpe_block) struct acpi_gpe_block_info *gpe_block)
{ {
acpi_status status;
struct acpi_gpe_event_info *gpe_event_info; struct acpi_gpe_event_info *gpe_event_info;
struct acpi_gpe_walk_info gpe_info; struct acpi_gpe_walk_info gpe_info;
u32 wake_gpe_count; u32 wake_gpe_count;
@ -1019,42 +998,50 @@ acpi_ev_initialize_gpe_block(struct acpi_namespace_node *gpe_device,
gpe_info.gpe_block = gpe_block; gpe_info.gpe_block = gpe_block;
gpe_info.gpe_device = gpe_device; gpe_info.gpe_device = gpe_device;
status = acpi_ns_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
acpi_ns_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
ACPI_UINT32_MAX, ACPI_NS_WALK_UNLOCK, ACPI_UINT32_MAX, ACPI_NS_WALK_UNLOCK,
acpi_ev_match_prw_and_gpe, NULL, acpi_ev_match_prw_and_gpe, NULL,
&gpe_info, NULL); &gpe_info, NULL);
} }
/* /*
* Enable all GPEs in this block that have these attributes: * Enable all GPEs that have a corresponding method and aren't
* 1) are "runtime" or "run/wake" GPEs, and * capable of generating wakeups. Any other GPEs within this block
* 2) have a corresponding _Lxx or _Exx method * must be enabled via the acpi_enable_gpe() interface.
*
* Any other GPEs within this block must be enabled via the
* acpi_enable_gpe() external interface.
*/ */
wake_gpe_count = 0; wake_gpe_count = 0;
gpe_enabled_count = 0; gpe_enabled_count = 0;
if (gpe_device == acpi_gbl_fadt_gpe_device)
gpe_device = NULL;
for (i = 0; i < gpe_block->register_count; i++) { for (i = 0; i < gpe_block->register_count; i++) {
for (j = 0; j < 8; j++) { for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) {
acpi_status status;
acpi_size gpe_index;
int gpe_number;
/* Get the info block for this particular GPE */ /* Get the info block for this particular GPE */
gpe_index = (acpi_size)i * ACPI_GPE_REGISTER_WIDTH + j;
gpe_event_info = &gpe_block->event_info[gpe_index];
gpe_event_info = &gpe_block->event_info[((acpi_size) i * if (gpe_event_info->flags & ACPI_GPE_CAN_WAKE) {
ACPI_GPE_REGISTER_WIDTH)
+ j];
if (((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
ACPI_GPE_DISPATCH_METHOD) &&
(gpe_event_info->flags & ACPI_GPE_TYPE_RUNTIME)) {
gpe_enabled_count++;
}
if (gpe_event_info->flags & ACPI_GPE_TYPE_WAKE) {
wake_gpe_count++; wake_gpe_count++;
if (acpi_gbl_leave_wake_gpes_disabled)
continue;
} }
if (!(gpe_event_info->flags & ACPI_GPE_DISPATCH_METHOD))
continue;
gpe_number = gpe_index + gpe_block->block_base_number;
status = acpi_enable_gpe(gpe_device, gpe_number,
ACPI_GPE_TYPE_RUNTIME);
if (ACPI_FAILURE(status))
ACPI_ERROR((AE_INFO,
"Failed to enable GPE %02X\n",
gpe_number));
else
gpe_enabled_count++;
} }
} }
@ -1062,15 +1049,7 @@ acpi_ev_initialize_gpe_block(struct acpi_namespace_node *gpe_device,
"Found %u Wake, Enabled %u Runtime GPEs in this block\n", "Found %u Wake, Enabled %u Runtime GPEs in this block\n",
wake_gpe_count, gpe_enabled_count)); wake_gpe_count, gpe_enabled_count));
/* Enable all valid runtime GPEs found above */ return_ACPI_STATUS(AE_OK);
status = acpi_hw_enable_runtime_gpe_block(NULL, gpe_block, NULL);
if (ACPI_FAILURE(status)) {
ACPI_ERROR((AE_INFO, "Could not enable GPEs in GpeBlock %p",
gpe_block));
}
return_ACPI_STATUS(status);
} }
/******************************************************************************* /*******************************************************************************

14
drivers/acpi/acpica/evxface.c
View File

@ -617,13 +617,6 @@ acpi_install_gpe_handler(acpi_handle gpe_device,
handler->context = context; handler->context = context;
handler->method_node = gpe_event_info->dispatch.method_node; handler->method_node = gpe_event_info->dispatch.method_node;
/* Disable the GPE before installing the handler */
status = acpi_ev_disable_gpe(gpe_event_info);
if (ACPI_FAILURE(status)) {
goto unlock_and_exit;
}
/* Install the handler */ /* Install the handler */
flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
@ -707,13 +700,6 @@ acpi_remove_gpe_handler(acpi_handle gpe_device,
goto unlock_and_exit; goto unlock_and_exit;
} }
/* Disable the GPE before removing the handler */
status = acpi_ev_disable_gpe(gpe_event_info);
if (ACPI_FAILURE(status)) {
goto unlock_and_exit;
}
/* Make sure all deferred tasks are completed */ /* Make sure all deferred tasks are completed */
(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS); (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);

92
drivers/acpi/acpica/evxfevnt.c
View File

@ -201,23 +201,27 @@ ACPI_EXPORT_SYMBOL(acpi_enable_event)
/******************************************************************************* /*******************************************************************************
* *
* FUNCTION: acpi_set_gpe_type * FUNCTION: acpi_set_gpe
* *
* PARAMETERS: gpe_device - Parent GPE Device * PARAMETERS: gpe_device - Parent GPE Device
* gpe_number - GPE level within the GPE block * gpe_number - GPE level within the GPE block
* Type - New GPE type * action - Enable or disable
* Called from ISR or not
* *
* RETURN: Status * RETURN: Status
* *
* DESCRIPTION: Set the type of an individual GPE * DESCRIPTION: Enable or disable an ACPI event (general purpose)
* *
******************************************************************************/ ******************************************************************************/
acpi_status acpi_set_gpe_type(acpi_handle gpe_device, u32 gpe_number, u8 type) acpi_status acpi_set_gpe(acpi_handle gpe_device, u32 gpe_number, u8 action)
{ {
acpi_status status = AE_OK; acpi_status status = AE_OK;
acpi_cpu_flags flags;
struct acpi_gpe_event_info *gpe_event_info; struct acpi_gpe_event_info *gpe_event_info;
ACPI_FUNCTION_TRACE(acpi_set_gpe_type); ACPI_FUNCTION_TRACE(acpi_set_gpe);
flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
/* Ensure that we have a valid GPE number */ /* Ensure that we have a valid GPE number */
@ -227,19 +231,29 @@ acpi_status acpi_set_gpe_type(acpi_handle gpe_device, u32 gpe_number, u8 type)
goto unlock_and_exit; goto unlock_and_exit;
} }
if ((gpe_event_info->flags & ACPI_GPE_TYPE_MASK) == type) { /* Perform the action */
return_ACPI_STATUS(AE_OK);
switch (action) {
case ACPI_GPE_ENABLE:
status = acpi_ev_enable_gpe(gpe_event_info, TRUE);
break;
case ACPI_GPE_DISABLE:
status = acpi_ev_disable_gpe(gpe_event_info);
break;
default:
ACPI_ERROR((AE_INFO, "Invalid action\n"));
status = AE_BAD_PARAMETER;
break;
} }
/* Set the new type (will disable GPE if currently enabled) */
status = acpi_ev_set_gpe_type(gpe_event_info, type);
unlock_and_exit: unlock_and_exit:
acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
return_ACPI_STATUS(status); return_ACPI_STATUS(status);
} }
ACPI_EXPORT_SYMBOL(acpi_set_gpe_type) ACPI_EXPORT_SYMBOL(acpi_set_gpe)
/******************************************************************************* /*******************************************************************************
* *
@ -247,15 +261,14 @@ ACPI_EXPORT_SYMBOL(acpi_set_gpe_type)
* *
* PARAMETERS: gpe_device - Parent GPE Device * PARAMETERS: gpe_device - Parent GPE Device
* gpe_number - GPE level within the GPE block * gpe_number - GPE level within the GPE block
* Flags - Just enable, or also wake enable? * type - Purpose the GPE will be used for
* Called from ISR or not
* *
* RETURN: Status * RETURN: Status
* *
* DESCRIPTION: Enable an ACPI event (general purpose) * DESCRIPTION: Take a reference to a GPE and enable it if necessary
* *
******************************************************************************/ ******************************************************************************/
acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number) acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number, u8 type)
{ {
acpi_status status = AE_OK; acpi_status status = AE_OK;
acpi_cpu_flags flags; acpi_cpu_flags flags;
@ -273,15 +286,32 @@ acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number)
goto unlock_and_exit; goto unlock_and_exit;
} }
/* Perform the enable */ if (type & ACPI_GPE_TYPE_RUNTIME) {
if (++gpe_event_info->runtime_count == 1)
status = acpi_ev_enable_gpe(gpe_event_info, TRUE);
status = acpi_ev_enable_gpe(gpe_event_info, TRUE); if (ACPI_FAILURE(status))
gpe_event_info->runtime_count--;
}
unlock_and_exit: if (type & ACPI_GPE_TYPE_WAKE) {
if (!(gpe_event_info->flags & ACPI_GPE_CAN_WAKE)) {
status = AE_BAD_PARAMETER;
goto unlock_and_exit;
}
/*
* Wake-up GPEs are only enabled right prior to putting the
* system into a sleep state.
*/
if (++gpe_event_info->wakeup_count == 1)
acpi_ev_update_gpe_enable_masks(gpe_event_info);
}
unlock_and_exit:
acpi_os_release_lock(acpi_gbl_gpe_lock, flags); acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
return_ACPI_STATUS(status); return_ACPI_STATUS(status);
} }
ACPI_EXPORT_SYMBOL(acpi_enable_gpe) ACPI_EXPORT_SYMBOL(acpi_enable_gpe)
/******************************************************************************* /*******************************************************************************
@ -290,15 +320,14 @@ ACPI_EXPORT_SYMBOL(acpi_enable_gpe)
* *
* PARAMETERS: gpe_device - Parent GPE Device * PARAMETERS: gpe_device - Parent GPE Device
* gpe_number - GPE level within the GPE block * gpe_number - GPE level within the GPE block
* Flags - Just disable, or also wake disable? * type - Purpose the GPE won't be used for any more
* Called from ISR or not
* *
* RETURN: Status * RETURN: Status
* *
* DESCRIPTION: Disable an ACPI event (general purpose) * DESCRIPTION: Release a reference to a GPE and disable it if necessary
* *
******************************************************************************/ ******************************************************************************/
acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number) acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number, u8 type)
{ {
acpi_status status = AE_OK; acpi_status status = AE_OK;
acpi_cpu_flags flags; acpi_cpu_flags flags;
@ -315,13 +344,24 @@ acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number)
goto unlock_and_exit; goto unlock_and_exit;
} }
status = acpi_ev_disable_gpe(gpe_event_info); if ((type & ACPI_GPE_TYPE_WAKE) && gpe_event_info->runtime_count) {
if (--gpe_event_info->runtime_count == 0)
acpi_ev_disable_gpe(gpe_event_info);
}
if ((type & ACPI_GPE_TYPE_RUNTIME) && gpe_event_info->wakeup_count) {
/*
* Wake-up GPEs are not enabled after leaving system sleep
* states, so we don't need to disable them here.
*/
if (--gpe_event_info->wakeup_count == 0)
acpi_ev_update_gpe_enable_masks(gpe_event_info);
}
unlock_and_exit: unlock_and_exit:
acpi_os_release_lock(acpi_gbl_gpe_lock, flags); acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
return_ACPI_STATUS(status); return_ACPI_STATUS(status);
} }
ACPI_EXPORT_SYMBOL(acpi_disable_gpe) ACPI_EXPORT_SYMBOL(acpi_disable_gpe)
/******************************************************************************* /*******************************************************************************

13
drivers/acpi/button.c
View File

@ -422,11 +422,9 @@ static int acpi_button_add(struct acpi_device *device)
if (device->wakeup.flags.valid) { if (device->wakeup.flags.valid) {
/* Button's GPE is run-wake GPE */ /* Button's GPE is run-wake GPE */
acpi_set_gpe_type(device->wakeup.gpe_device,
device->wakeup.gpe_number,
ACPI_GPE_TYPE_WAKE_RUN);
acpi_enable_gpe(device->wakeup.gpe_device, acpi_enable_gpe(device->wakeup.gpe_device,
device->wakeup.gpe_number); device->wakeup.gpe_number,
ACPI_GPE_TYPE_WAKE_RUN);
device->wakeup.state.enabled = 1; device->wakeup.state.enabled = 1;
} }
@ -446,6 +444,13 @@ static int acpi_button_remove(struct acpi_device *device, int type)
{ {
struct acpi_button *button = acpi_driver_data(device); struct acpi_button *button = acpi_driver_data(device);
if (device->wakeup.flags.valid) {
acpi_disable_gpe(device->wakeup.gpe_device,
device->wakeup.gpe_number,
ACPI_GPE_TYPE_WAKE_RUN);
device->wakeup.state.enabled = 0;
}
acpi_button_remove_fs(device); acpi_button_remove_fs(device);
input_unregister_device(button->input); input_unregister_device(button->input);
kfree(button); kfree(button);

14
drivers/acpi/ec.c
View File

@ -307,7 +307,7 @@ static int acpi_ec_transaction(struct acpi_ec *ec, struct transaction *t)
pr_debug(PREFIX "transaction start\n"); pr_debug(PREFIX "transaction start\n");
/* disable GPE during transaction if storm is detected */ /* disable GPE during transaction if storm is detected */
if (test_bit(EC_FLAGS_GPE_STORM, &ec->flags)) { if (test_bit(EC_FLAGS_GPE_STORM, &ec->flags)) {
acpi_disable_gpe(NULL, ec->gpe); acpi_set_gpe(NULL, ec->gpe, ACPI_GPE_DISABLE);
} }
status = acpi_ec_transaction_unlocked(ec, t); status = acpi_ec_transaction_unlocked(ec, t);
@ -317,7 +317,7 @@ static int acpi_ec_transaction(struct acpi_ec *ec, struct transaction *t)
if (test_bit(EC_FLAGS_GPE_STORM, &ec->flags)) { if (test_bit(EC_FLAGS_GPE_STORM, &ec->flags)) {
msleep(1); msleep(1);
/* it is safe to enable GPE outside of transaction */ /* it is safe to enable GPE outside of transaction */
acpi_enable_gpe(NULL, ec->gpe); acpi_set_gpe(NULL, ec->gpe, ACPI_GPE_ENABLE);
} else if (t->irq_count > ACPI_EC_STORM_THRESHOLD) { } else if (t->irq_count > ACPI_EC_STORM_THRESHOLD) {
pr_info(PREFIX "GPE storm detected, " pr_info(PREFIX "GPE storm detected, "
"transactions will use polling mode\n"); "transactions will use polling mode\n");
@ -788,8 +788,8 @@ static int ec_install_handlers(struct acpi_ec *ec)
&acpi_ec_gpe_handler, ec); &acpi_ec_gpe_handler, ec);
if (ACPI_FAILURE(status)) if (ACPI_FAILURE(status))
return -ENODEV; return -ENODEV;
acpi_set_gpe_type(NULL, ec->gpe, ACPI_GPE_TYPE_RUNTIME);
acpi_enable_gpe(NULL, ec->gpe); acpi_enable_gpe(NULL, ec->gpe, ACPI_GPE_TYPE_RUNTIME);
status = acpi_install_address_space_handler(ec->handle, status = acpi_install_address_space_handler(ec->handle,
ACPI_ADR_SPACE_EC, ACPI_ADR_SPACE_EC,
&acpi_ec_space_handler, &acpi_ec_space_handler,
@ -806,6 +806,7 @@ static int ec_install_handlers(struct acpi_ec *ec)
} else { } else {
acpi_remove_gpe_handler(NULL, ec->gpe, acpi_remove_gpe_handler(NULL, ec->gpe,
&acpi_ec_gpe_handler); &acpi_ec_gpe_handler);
acpi_disable_gpe(NULL, ec->gpe, ACPI_GPE_TYPE_RUNTIME);
return -ENODEV; return -ENODEV;
} }
} }
@ -816,6 +817,7 @@ static int ec_install_handlers(struct acpi_ec *ec)
static void ec_remove_handlers(struct acpi_ec *ec) static void ec_remove_handlers(struct acpi_ec *ec)
{ {
acpi_disable_gpe(NULL, ec->gpe, ACPI_GPE_TYPE_RUNTIME);
if (ACPI_FAILURE(acpi_remove_address_space_handler(ec->handle, if (ACPI_FAILURE(acpi_remove_address_space_handler(ec->handle,
ACPI_ADR_SPACE_EC, &acpi_ec_space_handler))) ACPI_ADR_SPACE_EC, &acpi_ec_space_handler)))
pr_err(PREFIX "failed to remove space handler\n"); pr_err(PREFIX "failed to remove space handler\n");
@ -1058,7 +1060,7 @@ static int acpi_ec_suspend(struct acpi_device *device, pm_message_t state)
{ {
struct acpi_ec *ec = acpi_driver_data(device); struct acpi_ec *ec = acpi_driver_data(device);
/* Stop using GPE */ /* Stop using GPE */
acpi_disable_gpe(NULL, ec->gpe); acpi_set_gpe(NULL, ec->gpe, ACPI_GPE_DISABLE);
return 0; return 0;
} }
@ -1066,7 +1068,7 @@ static int acpi_ec_resume(struct acpi_device *device)
{ {
struct acpi_ec *ec = acpi_driver_data(device); struct acpi_ec *ec = acpi_driver_data(device);
/* Enable use of GPE back */ /* Enable use of GPE back */
acpi_enable_gpe(NULL, ec->gpe); acpi_set_gpe(NULL, ec->gpe, ACPI_GPE_ENABLE);
return 0; return 0;
} }

15
drivers/acpi/sleep.c
View File

@ -745,9 +745,18 @@ int acpi_pm_device_sleep_wake(struct device *dev, bool enable)
return -ENODEV; return -ENODEV;
} }
error = enable ? if (enable) {
acpi_enable_wakeup_device_power(adev, acpi_target_sleep_state) : error = acpi_enable_wakeup_device_power(adev,
acpi_disable_wakeup_device_power(adev); acpi_target_sleep_state);
if (!error)
acpi_enable_gpe(adev->wakeup.gpe_device,
adev->wakeup.gpe_number,
ACPI_GPE_TYPE_WAKE);
} else {
acpi_disable_gpe(adev->wakeup.gpe_device, adev->wakeup.gpe_number,
ACPI_GPE_TYPE_WAKE);
error = acpi_disable_wakeup_device_power(adev);
}
if (!error) if (!error)
dev_info(dev, "wake-up capability %s by ACPI\n", dev_info(dev, "wake-up capability %s by ACPI\n",
enable ? "enabled" : "disabled"); enable ? "enabled" : "disabled");

4
drivers/acpi/system.c
View File

@ -387,10 +387,10 @@ static ssize_t counter_set(struct kobject *kobj,
if (index < num_gpes) { if (index < num_gpes) {
if (!strcmp(buf, "disable\n") && if (!strcmp(buf, "disable\n") &&
(status & ACPI_EVENT_FLAG_ENABLED)) (status & ACPI_EVENT_FLAG_ENABLED))
result = acpi_disable_gpe(handle, index); result = acpi_set_gpe(handle, index, ACPI_GPE_DISABLE);
else if (!strcmp(buf, "enable\n") && else if (!strcmp(buf, "enable\n") &&
!(status & ACPI_EVENT_FLAG_ENABLED)) !(status & ACPI_EVENT_FLAG_ENABLED))
result = acpi_enable_gpe(handle, index); result = acpi_set_gpe(handle, index, ACPI_GPE_ENABLE);
else if (!strcmp(buf, "clear\n") && else if (!strcmp(buf, "clear\n") &&
(status & ACPI_EVENT_FLAG_SET)) (status & ACPI_EVENT_FLAG_SET))
result = acpi_clear_gpe(handle, index, ACPI_NOT_ISR); result = acpi_clear_gpe(handle, index, ACPI_NOT_ISR);

81
drivers/acpi/wakeup.c
View File

@ -21,12 +21,12 @@
ACPI_MODULE_NAME("wakeup_devices") ACPI_MODULE_NAME("wakeup_devices")
/** /**
* acpi_enable_wakeup_device_prep - prepare wakeup devices * acpi_enable_wakeup_device_prep - Prepare wake-up devices.
* @sleep_state: ACPI state * @sleep_state: ACPI system sleep state.
* Enable all wakup devices power if the devices' wakeup level *
* is higher than requested sleep level * Enable all wake-up devices' power, unless the requested system sleep state is
* too deep.
*/ */
void acpi_enable_wakeup_device_prep(u8 sleep_state) void acpi_enable_wakeup_device_prep(u8 sleep_state)
{ {
struct list_head *node, *next; struct list_head *node, *next;
@ -36,9 +36,8 @@ void acpi_enable_wakeup_device_prep(u8 sleep_state)
struct acpi_device, struct acpi_device,
wakeup_list); wakeup_list);
if (!dev->wakeup.flags.valid || if (!dev->wakeup.flags.valid || !dev->wakeup.state.enabled
!dev->wakeup.state.enabled || || (sleep_state > (u32) dev->wakeup.sleep_state))
(sleep_state > (u32) dev->wakeup.sleep_state))
continue; continue;
acpi_enable_wakeup_device_power(dev, sleep_state); acpi_enable_wakeup_device_power(dev, sleep_state);
@ -46,9 +45,12 @@ void acpi_enable_wakeup_device_prep(u8 sleep_state)
} }
/** /**
* acpi_enable_wakeup_device - enable wakeup devices * acpi_enable_wakeup_device - Enable wake-up device GPEs.
* @sleep_state: ACPI state * @sleep_state: ACPI system sleep state.
* Enable all wakup devices's GPE *
* Enable all wake-up devices' GPEs, with the assumption that
* acpi_disable_all_gpes() was executed before, so we don't need to disable any
* GPEs here.
*/ */
void acpi_enable_wakeup_device(u8 sleep_state) void acpi_enable_wakeup_device(u8 sleep_state)
{ {
@ -65,29 +67,22 @@ void acpi_enable_wakeup_device(u8 sleep_state)
if (!dev->wakeup.flags.valid) if (!dev->wakeup.flags.valid)
continue; continue;
/* If users want to disable run-wake GPE,
* we only disable it for wake and leave it for runtime
*/
if ((!dev->wakeup.state.enabled && !dev->wakeup.prepare_count) if ((!dev->wakeup.state.enabled && !dev->wakeup.prepare_count)
|| sleep_state > (u32) dev->wakeup.sleep_state) { || sleep_state > (u32) dev->wakeup.sleep_state)
if (dev->wakeup.flags.run_wake) {
/* set_gpe_type will disable GPE, leave it like that */
acpi_set_gpe_type(dev->wakeup.gpe_device,
dev->wakeup.gpe_number,
ACPI_GPE_TYPE_RUNTIME);
}
continue; continue;
}
if (!dev->wakeup.flags.run_wake) /* The wake-up power should have been enabled already. */
acpi_enable_gpe(dev->wakeup.gpe_device, acpi_set_gpe(dev->wakeup.gpe_device, dev->wakeup.gpe_number,
dev->wakeup.gpe_number); ACPI_GPE_ENABLE);
} }
} }
/** /**
* acpi_disable_wakeup_device - disable devices' wakeup capability * acpi_disable_wakeup_device - Disable devices' wakeup capability.
* @sleep_state: ACPI state * @sleep_state: ACPI system sleep state.
* Disable all wakup devices's GPE and wakeup capability *
* This function only affects devices with wakeup.state.enabled set, which means
* that it reverses the changes made by acpi_enable_wakeup_device_prep().
*/ */
void acpi_disable_wakeup_device(u8 sleep_state) void acpi_disable_wakeup_device(u8 sleep_state)
{ {
@ -97,30 +92,11 @@ void acpi_disable_wakeup_device(u8 sleep_state)
struct acpi_device *dev = struct acpi_device *dev =
container_of(node, struct acpi_device, wakeup_list); container_of(node, struct acpi_device, wakeup_list);
if (!dev->wakeup.flags.valid) if (!dev->wakeup.flags.valid || !dev->wakeup.state.enabled
|| (sleep_state > (u32) dev->wakeup.sleep_state))
continue; continue;
if ((!dev->wakeup.state.enabled && !dev->wakeup.prepare_count)
|| sleep_state > (u32) dev->wakeup.sleep_state) {
if (dev->wakeup.flags.run_wake) {
acpi_set_gpe_type(dev->wakeup.gpe_device,
dev->wakeup.gpe_number,
ACPI_GPE_TYPE_WAKE_RUN);
/* Re-enable it, since set_gpe_type will disable it */
acpi_enable_gpe(dev->wakeup.gpe_device,
dev->wakeup.gpe_number);
}
continue;
}
acpi_disable_wakeup_device_power(dev); acpi_disable_wakeup_device_power(dev);
/* Never disable run-wake GPE */
if (!dev->wakeup.flags.run_wake) {
acpi_disable_gpe(dev->wakeup.gpe_device,
dev->wakeup.gpe_number);
acpi_clear_gpe(dev->wakeup.gpe_device,
dev->wakeup.gpe_number, ACPI_NOT_ISR);
}
} }
} }
@ -136,11 +112,8 @@ int __init acpi_wakeup_device_init(void)
/* In case user doesn't load button driver */ /* In case user doesn't load button driver */
if (!dev->wakeup.flags.run_wake || dev->wakeup.state.enabled) if (!dev->wakeup.flags.run_wake || dev->wakeup.state.enabled)
continue; continue;
acpi_set_gpe_type(dev->wakeup.gpe_device, acpi_enable_gpe(dev->wakeup.gpe_device, dev->wakeup.gpe_number,
dev->wakeup.gpe_number, ACPI_GPE_TYPE_WAKE);
ACPI_GPE_TYPE_WAKE_RUN);
acpi_enable_gpe(dev->wakeup.gpe_device,
dev->wakeup.gpe_number);
dev->wakeup.state.enabled = 1; dev->wakeup.state.enabled = 1;
} }
mutex_unlock(&acpi_device_lock); mutex_unlock(&acpi_device_lock);

6
include/acpi/acpixf.h
View File

@ -281,11 +281,11 @@ acpi_status acpi_get_event_status(u32 event, acpi_event_status * event_status);
/* /*
* GPE Interfaces * GPE Interfaces
*/ */
acpi_status acpi_set_gpe_type(acpi_handle gpe_device, u32 gpe_number, u8 type); acpi_status acpi_set_gpe(acpi_handle gpe_device, u32 gpe_number, u8 action);
acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number); acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number, u8 type);
acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number); acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number, u8 type);
acpi_status acpi_clear_gpe(acpi_handle gpe_device, u32 gpe_number, u32 flags); acpi_status acpi_clear_gpe(acpi_handle gpe_device, u32 gpe_number, u32 flags);

28
include/acpi/actypes.h
View File

@ -668,15 +668,16 @@ typedef u32 acpi_event_status;
/* /*
* GPE info flags - Per GPE * GPE info flags - Per GPE
* +-+-+-+---+---+-+ * +-+-+-+---+-+-+-+
* |7|6|5|4:3|2:1|0| * |7|6|5|4:3|2|1|0|
* +-+-+-+---+---+-+ * +-+-+-+---+-+-+-+
* | | | | | | * | | | | | | |
* | | | | | +--- Interrupt type: Edge or Level Triggered * | | | | | | +--- Interrupt type: Edge or Level Triggered
* | | | | +--- Type: Wake-only, Runtime-only, or wake/runtime * | | | | | +--- GPE can wake the system
* | | | | +--- Unused
* | | | +--- Type of dispatch -- to method, handler, or none * | | | +--- Type of dispatch -- to method, handler, or none
* | | +--- Enabled for runtime? * | | +--- Unused
* | +--- Enabled for wake? * | +--- Unused
* +--- Unused * +--- Unused
*/ */
#define ACPI_GPE_XRUPT_TYPE_MASK (u8) 0x01 #define ACPI_GPE_XRUPT_TYPE_MASK (u8) 0x01
@ -687,22 +688,13 @@ typedef u32 acpi_event_status;
#define ACPI_GPE_TYPE_WAKE_RUN (u8) 0x06 #define ACPI_GPE_TYPE_WAKE_RUN (u8) 0x06
#define ACPI_GPE_TYPE_WAKE (u8) 0x02 #define ACPI_GPE_TYPE_WAKE (u8) 0x02
#define ACPI_GPE_TYPE_RUNTIME (u8) 0x04 /* Default */ #define ACPI_GPE_TYPE_RUNTIME (u8) 0x04 /* Default */
#define ACPI_GPE_CAN_WAKE (u8) 0x02
#define ACPI_GPE_DISPATCH_MASK (u8) 0x18 #define ACPI_GPE_DISPATCH_MASK (u8) 0x18
#define ACPI_GPE_DISPATCH_HANDLER (u8) 0x08 #define ACPI_GPE_DISPATCH_HANDLER (u8) 0x08
#define ACPI_GPE_DISPATCH_METHOD (u8) 0x10 #define ACPI_GPE_DISPATCH_METHOD (u8) 0x10
#define ACPI_GPE_DISPATCH_NOT_USED (u8) 0x00 /* Default */ #define ACPI_GPE_DISPATCH_NOT_USED (u8) 0x00 /* Default */
#define ACPI_GPE_RUN_ENABLE_MASK (u8) 0x20
#define ACPI_GPE_RUN_ENABLED (u8) 0x20
#define ACPI_GPE_RUN_DISABLED (u8) 0x00 /* Default */
#define ACPI_GPE_WAKE_ENABLE_MASK (u8) 0x40
#define ACPI_GPE_WAKE_ENABLED (u8) 0x40
#define ACPI_GPE_WAKE_DISABLED (u8) 0x00 /* Default */
#define ACPI_GPE_ENABLE_MASK (u8) 0x60 /* Both run/wake */
/* /*
* Flags for GPE and Lock interfaces * Flags for GPE and Lock interfaces
*/ */