77848130e5
Update all copyrights to 2012. Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Lin Ming <ming.m.lin@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
768 lines
22 KiB
C
768 lines
22 KiB
C
/******************************************************************************
|
|
*
|
|
* Module Name: evgpe - General Purpose Event handling and dispatch
|
|
*
|
|
*****************************************************************************/
|
|
|
|
/*
|
|
* Copyright (C) 2000 - 2012, Intel Corp.
|
|
* All rights reserved.
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions, and the following disclaimer,
|
|
* without modification.
|
|
* 2. Redistributions in binary form must reproduce at minimum a disclaimer
|
|
* substantially similar to the "NO WARRANTY" disclaimer below
|
|
* ("Disclaimer") and any redistribution must be conditioned upon
|
|
* including a substantially similar Disclaimer requirement for further
|
|
* binary redistribution.
|
|
* 3. Neither the names of the above-listed copyright holders nor the names
|
|
* of any contributors may be used to endorse or promote products derived
|
|
* from this software without specific prior written permission.
|
|
*
|
|
* Alternatively, this software may be distributed under the terms of the
|
|
* GNU General Public License ("GPL") version 2 as published by the Free
|
|
* Software Foundation.
|
|
*
|
|
* NO WARRANTY
|
|
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
|
|
* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
|
|
* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
|
|
* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
|
|
* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
|
|
* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
|
|
* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
|
|
* POSSIBILITY OF SUCH DAMAGES.
|
|
*/
|
|
|
|
#include <acpi/acpi.h>
|
|
#include "accommon.h"
|
|
#include "acevents.h"
|
|
#include "acnamesp.h"
|
|
|
|
#define _COMPONENT ACPI_EVENTS
|
|
ACPI_MODULE_NAME("evgpe")
|
|
|
|
/* Local prototypes */
|
|
static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context);
|
|
|
|
static void ACPI_SYSTEM_XFACE acpi_ev_asynch_enable_gpe(void *context);
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ev_update_gpe_enable_mask
|
|
*
|
|
* PARAMETERS: gpe_event_info - GPE to update
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Updates GPE register enable mask based upon whether there are
|
|
* runtime references to this GPE
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_ev_update_gpe_enable_mask(struct acpi_gpe_event_info *gpe_event_info)
|
|
{
|
|
struct acpi_gpe_register_info *gpe_register_info;
|
|
u32 register_bit;
|
|
|
|
ACPI_FUNCTION_TRACE(ev_update_gpe_enable_mask);
|
|
|
|
gpe_register_info = gpe_event_info->register_info;
|
|
if (!gpe_register_info) {
|
|
return_ACPI_STATUS(AE_NOT_EXIST);
|
|
}
|
|
|
|
register_bit = acpi_hw_get_gpe_register_bit(gpe_event_info,
|
|
gpe_register_info);
|
|
|
|
/* Clear the run bit up front */
|
|
|
|
ACPI_CLEAR_BIT(gpe_register_info->enable_for_run, register_bit);
|
|
|
|
/* Set the mask bit only if there are references to this GPE */
|
|
|
|
if (gpe_event_info->runtime_count) {
|
|
ACPI_SET_BIT(gpe_register_info->enable_for_run, (u8)register_bit);
|
|
}
|
|
|
|
return_ACPI_STATUS(AE_OK);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ev_enable_gpe
|
|
*
|
|
* PARAMETERS: gpe_event_info - GPE to enable
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Clear a GPE of stale events and enable it.
|
|
*
|
|
******************************************************************************/
|
|
acpi_status
|
|
acpi_ev_enable_gpe(struct acpi_gpe_event_info *gpe_event_info)
|
|
{
|
|
acpi_status status;
|
|
|
|
ACPI_FUNCTION_TRACE(ev_enable_gpe);
|
|
|
|
/*
|
|
* We will only allow a GPE to be enabled if it has either an associated
|
|
* method (_Lxx/_Exx) or a handler, or is using the implicit notify
|
|
* feature. Otherwise, the GPE will be immediately disabled by
|
|
* acpi_ev_gpe_dispatch the first time it fires.
|
|
*/
|
|
if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
|
|
ACPI_GPE_DISPATCH_NONE) {
|
|
return_ACPI_STATUS(AE_NO_HANDLER);
|
|
}
|
|
|
|
/* Clear the GPE (of stale events) */
|
|
status = acpi_hw_clear_gpe(gpe_event_info);
|
|
if (ACPI_FAILURE(status)) {
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/* Enable the requested GPE */
|
|
status = acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_ENABLE);
|
|
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ev_add_gpe_reference
|
|
*
|
|
* PARAMETERS: gpe_event_info - Add a reference to this GPE
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Add a reference to a GPE. On the first reference, the GPE is
|
|
* hardware-enabled.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status acpi_ev_add_gpe_reference(struct acpi_gpe_event_info *gpe_event_info)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
|
|
ACPI_FUNCTION_TRACE(ev_add_gpe_reference);
|
|
|
|
if (gpe_event_info->runtime_count == ACPI_UINT8_MAX) {
|
|
return_ACPI_STATUS(AE_LIMIT);
|
|
}
|
|
|
|
gpe_event_info->runtime_count++;
|
|
if (gpe_event_info->runtime_count == 1) {
|
|
|
|
/* Enable on first reference */
|
|
|
|
status = acpi_ev_update_gpe_enable_mask(gpe_event_info);
|
|
if (ACPI_SUCCESS(status)) {
|
|
status = acpi_ev_enable_gpe(gpe_event_info);
|
|
}
|
|
|
|
if (ACPI_FAILURE(status)) {
|
|
gpe_event_info->runtime_count--;
|
|
}
|
|
}
|
|
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ev_remove_gpe_reference
|
|
*
|
|
* PARAMETERS: gpe_event_info - Remove a reference to this GPE
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Remove a reference to a GPE. When the last reference is
|
|
* removed, the GPE is hardware-disabled.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status acpi_ev_remove_gpe_reference(struct acpi_gpe_event_info *gpe_event_info)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
|
|
ACPI_FUNCTION_TRACE(ev_remove_gpe_reference);
|
|
|
|
if (!gpe_event_info->runtime_count) {
|
|
return_ACPI_STATUS(AE_LIMIT);
|
|
}
|
|
|
|
gpe_event_info->runtime_count--;
|
|
if (!gpe_event_info->runtime_count) {
|
|
|
|
/* Disable on last reference */
|
|
|
|
status = acpi_ev_update_gpe_enable_mask(gpe_event_info);
|
|
if (ACPI_SUCCESS(status)) {
|
|
status = acpi_hw_low_set_gpe(gpe_event_info,
|
|
ACPI_GPE_DISABLE);
|
|
}
|
|
|
|
if (ACPI_FAILURE(status)) {
|
|
gpe_event_info->runtime_count++;
|
|
}
|
|
}
|
|
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ev_low_get_gpe_info
|
|
*
|
|
* PARAMETERS: gpe_number - Raw GPE number
|
|
* gpe_block - A GPE info block
|
|
*
|
|
* RETURN: A GPE event_info struct. NULL if not a valid GPE (The gpe_number
|
|
* is not within the specified GPE block)
|
|
*
|
|
* DESCRIPTION: Returns the event_info struct associated with this GPE. This is
|
|
* the low-level implementation of ev_get_gpe_event_info.
|
|
*
|
|
******************************************************************************/
|
|
|
|
struct acpi_gpe_event_info *acpi_ev_low_get_gpe_info(u32 gpe_number,
|
|
struct acpi_gpe_block_info
|
|
*gpe_block)
|
|
{
|
|
u32 gpe_index;
|
|
|
|
/*
|
|
* Validate that the gpe_number is within the specified gpe_block.
|
|
* (Two steps)
|
|
*/
|
|
if (!gpe_block || (gpe_number < gpe_block->block_base_number)) {
|
|
return (NULL);
|
|
}
|
|
|
|
gpe_index = gpe_number - gpe_block->block_base_number;
|
|
if (gpe_index >= gpe_block->gpe_count) {
|
|
return (NULL);
|
|
}
|
|
|
|
return (&gpe_block->event_info[gpe_index]);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ev_get_gpe_event_info
|
|
*
|
|
* PARAMETERS: gpe_device - Device node. NULL for GPE0/GPE1
|
|
* gpe_number - Raw GPE number
|
|
*
|
|
* RETURN: A GPE event_info struct. NULL if not a valid GPE
|
|
*
|
|
* DESCRIPTION: Returns the event_info struct associated with this GPE.
|
|
* Validates the gpe_block and the gpe_number
|
|
*
|
|
* Should be called only when the GPE lists are semaphore locked
|
|
* and not subject to change.
|
|
*
|
|
******************************************************************************/
|
|
|
|
struct acpi_gpe_event_info *acpi_ev_get_gpe_event_info(acpi_handle gpe_device,
|
|
u32 gpe_number)
|
|
{
|
|
union acpi_operand_object *obj_desc;
|
|
struct acpi_gpe_event_info *gpe_info;
|
|
u32 i;
|
|
|
|
ACPI_FUNCTION_ENTRY();
|
|
|
|
/* A NULL gpe_device means use the FADT-defined GPE block(s) */
|
|
|
|
if (!gpe_device) {
|
|
|
|
/* Examine GPE Block 0 and 1 (These blocks are permanent) */
|
|
|
|
for (i = 0; i < ACPI_MAX_GPE_BLOCKS; i++) {
|
|
gpe_info = acpi_ev_low_get_gpe_info(gpe_number,
|
|
acpi_gbl_gpe_fadt_blocks
|
|
[i]);
|
|
if (gpe_info) {
|
|
return (gpe_info);
|
|
}
|
|
}
|
|
|
|
/* The gpe_number was not in the range of either FADT GPE block */
|
|
|
|
return (NULL);
|
|
}
|
|
|
|
/* A Non-NULL gpe_device means this is a GPE Block Device */
|
|
|
|
obj_desc = acpi_ns_get_attached_object((struct acpi_namespace_node *)
|
|
gpe_device);
|
|
if (!obj_desc || !obj_desc->device.gpe_block) {
|
|
return (NULL);
|
|
}
|
|
|
|
return (acpi_ev_low_get_gpe_info
|
|
(gpe_number, obj_desc->device.gpe_block));
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ev_gpe_detect
|
|
*
|
|
* PARAMETERS: gpe_xrupt_list - Interrupt block for this interrupt.
|
|
* Can have multiple GPE blocks attached.
|
|
*
|
|
* RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
|
|
*
|
|
* DESCRIPTION: Detect if any GP events have occurred. This function is
|
|
* executed at interrupt level.
|
|
*
|
|
******************************************************************************/
|
|
|
|
u32 acpi_ev_gpe_detect(struct acpi_gpe_xrupt_info * gpe_xrupt_list)
|
|
{
|
|
acpi_status status;
|
|
struct acpi_gpe_block_info *gpe_block;
|
|
struct acpi_gpe_register_info *gpe_register_info;
|
|
u32 int_status = ACPI_INTERRUPT_NOT_HANDLED;
|
|
u8 enabled_status_byte;
|
|
u32 status_reg;
|
|
u32 enable_reg;
|
|
acpi_cpu_flags flags;
|
|
u32 i;
|
|
u32 j;
|
|
|
|
ACPI_FUNCTION_NAME(ev_gpe_detect);
|
|
|
|
/* Check for the case where there are no GPEs */
|
|
|
|
if (!gpe_xrupt_list) {
|
|
return (int_status);
|
|
}
|
|
|
|
/*
|
|
* We need to obtain the GPE lock for both the data structs and registers
|
|
* Note: Not necessary to obtain the hardware lock, since the GPE
|
|
* registers are owned by the gpe_lock.
|
|
*/
|
|
flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
|
|
|
|
/* Examine all GPE blocks attached to this interrupt level */
|
|
|
|
gpe_block = gpe_xrupt_list->gpe_block_list_head;
|
|
while (gpe_block) {
|
|
/*
|
|
* Read all of the 8-bit GPE status and enable registers in this GPE
|
|
* block, saving all of them. Find all currently active GP events.
|
|
*/
|
|
for (i = 0; i < gpe_block->register_count; i++) {
|
|
|
|
/* Get the next status/enable pair */
|
|
|
|
gpe_register_info = &gpe_block->register_info[i];
|
|
|
|
/*
|
|
* Optimization: If there are no GPEs enabled within this
|
|
* register, we can safely ignore the entire register.
|
|
*/
|
|
if (!(gpe_register_info->enable_for_run |
|
|
gpe_register_info->enable_for_wake)) {
|
|
continue;
|
|
}
|
|
|
|
/* Read the Status Register */
|
|
|
|
status =
|
|
acpi_hw_read(&status_reg,
|
|
&gpe_register_info->status_address);
|
|
if (ACPI_FAILURE(status)) {
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
/* Read the Enable Register */
|
|
|
|
status =
|
|
acpi_hw_read(&enable_reg,
|
|
&gpe_register_info->enable_address);
|
|
if (ACPI_FAILURE(status)) {
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INTERRUPTS,
|
|
"Read GPE Register at GPE%02X: Status=%02X, Enable=%02X\n",
|
|
gpe_register_info->base_gpe_number,
|
|
status_reg, enable_reg));
|
|
|
|
/* Check if there is anything active at all in this register */
|
|
|
|
enabled_status_byte = (u8) (status_reg & enable_reg);
|
|
if (!enabled_status_byte) {
|
|
|
|
/* No active GPEs in this register, move on */
|
|
|
|
continue;
|
|
}
|
|
|
|
/* Now look at the individual GPEs in this byte register */
|
|
|
|
for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) {
|
|
|
|
/* Examine one GPE bit */
|
|
|
|
if (enabled_status_byte & (1 << j)) {
|
|
/*
|
|
* Found an active GPE. Dispatch the event to a handler
|
|
* or method.
|
|
*/
|
|
int_status |=
|
|
acpi_ev_gpe_dispatch(gpe_block->
|
|
node,
|
|
&gpe_block->
|
|
event_info[((acpi_size) i * ACPI_GPE_REGISTER_WIDTH) + j], j + gpe_register_info->base_gpe_number);
|
|
}
|
|
}
|
|
}
|
|
|
|
gpe_block = gpe_block->next;
|
|
}
|
|
|
|
unlock_and_exit:
|
|
|
|
acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
|
|
return (int_status);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ev_asynch_execute_gpe_method
|
|
*
|
|
* PARAMETERS: Context (gpe_event_info) - Info for this GPE
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Perform the actual execution of a GPE control method. This
|
|
* function is called from an invocation of acpi_os_execute and
|
|
* therefore does NOT execute at interrupt level - so that
|
|
* the control method itself is not executed in the context of
|
|
* an interrupt handler.
|
|
*
|
|
******************************************************************************/
|
|
|
|
static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context)
|
|
{
|
|
struct acpi_gpe_event_info *gpe_event_info = context;
|
|
acpi_status status;
|
|
struct acpi_gpe_event_info *local_gpe_event_info;
|
|
struct acpi_evaluate_info *info;
|
|
struct acpi_gpe_notify_object *notify_object;
|
|
|
|
ACPI_FUNCTION_TRACE(ev_asynch_execute_gpe_method);
|
|
|
|
/* Allocate a local GPE block */
|
|
|
|
local_gpe_event_info =
|
|
ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_event_info));
|
|
if (!local_gpe_event_info) {
|
|
ACPI_EXCEPTION((AE_INFO, AE_NO_MEMORY, "while handling a GPE"));
|
|
return_VOID;
|
|
}
|
|
|
|
status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_FREE(local_gpe_event_info);
|
|
return_VOID;
|
|
}
|
|
|
|
/* Must revalidate the gpe_number/gpe_block */
|
|
|
|
if (!acpi_ev_valid_gpe_event(gpe_event_info)) {
|
|
status = acpi_ut_release_mutex(ACPI_MTX_EVENTS);
|
|
ACPI_FREE(local_gpe_event_info);
|
|
return_VOID;
|
|
}
|
|
|
|
/*
|
|
* Take a snapshot of the GPE info for this level - we copy the info to
|
|
* prevent a race condition with remove_handler/remove_block.
|
|
*/
|
|
ACPI_MEMCPY(local_gpe_event_info, gpe_event_info,
|
|
sizeof(struct acpi_gpe_event_info));
|
|
|
|
status = acpi_ut_release_mutex(ACPI_MTX_EVENTS);
|
|
if (ACPI_FAILURE(status)) {
|
|
return_VOID;
|
|
}
|
|
|
|
/* Do the correct dispatch - normal method or implicit notify */
|
|
|
|
switch (local_gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) {
|
|
case ACPI_GPE_DISPATCH_NOTIFY:
|
|
|
|
/*
|
|
* Implicit notify.
|
|
* Dispatch a DEVICE_WAKE notify to the appropriate handler.
|
|
* NOTE: the request is queued for execution after this method
|
|
* completes. The notify handlers are NOT invoked synchronously
|
|
* from this thread -- because handlers may in turn run other
|
|
* control methods.
|
|
*/
|
|
status = acpi_ev_queue_notify_request(
|
|
local_gpe_event_info->dispatch.device.node,
|
|
ACPI_NOTIFY_DEVICE_WAKE);
|
|
|
|
notify_object = local_gpe_event_info->dispatch.device.next;
|
|
while (ACPI_SUCCESS(status) && notify_object) {
|
|
status = acpi_ev_queue_notify_request(
|
|
notify_object->node,
|
|
ACPI_NOTIFY_DEVICE_WAKE);
|
|
notify_object = notify_object->next;
|
|
}
|
|
|
|
break;
|
|
|
|
case ACPI_GPE_DISPATCH_METHOD:
|
|
|
|
/* Allocate the evaluation information block */
|
|
|
|
info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info));
|
|
if (!info) {
|
|
status = AE_NO_MEMORY;
|
|
} else {
|
|
/*
|
|
* Invoke the GPE Method (_Lxx, _Exx) i.e., evaluate the _Lxx/_Exx
|
|
* control method that corresponds to this GPE
|
|
*/
|
|
info->prefix_node =
|
|
local_gpe_event_info->dispatch.method_node;
|
|
info->flags = ACPI_IGNORE_RETURN_VALUE;
|
|
|
|
status = acpi_ns_evaluate(info);
|
|
ACPI_FREE(info);
|
|
}
|
|
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_EXCEPTION((AE_INFO, status,
|
|
"while evaluating GPE method [%4.4s]",
|
|
acpi_ut_get_node_name
|
|
(local_gpe_event_info->dispatch.
|
|
method_node)));
|
|
}
|
|
|
|
break;
|
|
|
|
default:
|
|
return_VOID; /* Should never happen */
|
|
}
|
|
|
|
/* Defer enabling of GPE until all notify handlers are done */
|
|
|
|
status = acpi_os_execute(OSL_NOTIFY_HANDLER,
|
|
acpi_ev_asynch_enable_gpe,
|
|
local_gpe_event_info);
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_FREE(local_gpe_event_info);
|
|
}
|
|
return_VOID;
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ev_asynch_enable_gpe
|
|
*
|
|
* PARAMETERS: Context (gpe_event_info) - Info for this GPE
|
|
* Callback from acpi_os_execute
|
|
*
|
|
* RETURN: None
|
|
*
|
|
* DESCRIPTION: Asynchronous clear/enable for GPE. This allows the GPE to
|
|
* complete (i.e., finish execution of Notify)
|
|
*
|
|
******************************************************************************/
|
|
|
|
static void ACPI_SYSTEM_XFACE acpi_ev_asynch_enable_gpe(void *context)
|
|
{
|
|
struct acpi_gpe_event_info *gpe_event_info = context;
|
|
|
|
(void)acpi_ev_finish_gpe(gpe_event_info);
|
|
|
|
ACPI_FREE(gpe_event_info);
|
|
return;
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ev_finish_gpe
|
|
*
|
|
* PARAMETERS: gpe_event_info - Info for this GPE
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Clear/Enable a GPE. Common code that is used after execution
|
|
* of a GPE method or a synchronous or asynchronous GPE handler.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status acpi_ev_finish_gpe(struct acpi_gpe_event_info *gpe_event_info)
|
|
{
|
|
acpi_status status;
|
|
|
|
if ((gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK) ==
|
|
ACPI_GPE_LEVEL_TRIGGERED) {
|
|
/*
|
|
* GPE is level-triggered, we clear the GPE status bit after
|
|
* handling the event.
|
|
*/
|
|
status = acpi_hw_clear_gpe(gpe_event_info);
|
|
if (ACPI_FAILURE(status)) {
|
|
return (status);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Enable this GPE, conditionally. This means that the GPE will
|
|
* only be physically enabled if the enable_for_run bit is set
|
|
* in the event_info.
|
|
*/
|
|
(void)acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_CONDITIONAL_ENABLE);
|
|
return (AE_OK);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ev_gpe_dispatch
|
|
*
|
|
* PARAMETERS: gpe_device - Device node. NULL for GPE0/GPE1
|
|
* gpe_event_info - Info for this GPE
|
|
* gpe_number - Number relative to the parent GPE block
|
|
*
|
|
* RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED
|
|
*
|
|
* DESCRIPTION: Dispatch a General Purpose Event to either a function (e.g. EC)
|
|
* or method (e.g. _Lxx/_Exx) handler.
|
|
*
|
|
* This function executes at interrupt level.
|
|
*
|
|
******************************************************************************/
|
|
|
|
u32
|
|
acpi_ev_gpe_dispatch(struct acpi_namespace_node *gpe_device,
|
|
struct acpi_gpe_event_info *gpe_event_info, u32 gpe_number)
|
|
{
|
|
acpi_status status;
|
|
u32 return_value;
|
|
|
|
ACPI_FUNCTION_TRACE(ev_gpe_dispatch);
|
|
|
|
/* Invoke global event handler if present */
|
|
|
|
acpi_gpe_count++;
|
|
if (acpi_gbl_global_event_handler) {
|
|
acpi_gbl_global_event_handler(ACPI_EVENT_TYPE_GPE, gpe_device,
|
|
gpe_number,
|
|
acpi_gbl_global_event_handler_context);
|
|
}
|
|
|
|
/*
|
|
* If edge-triggered, clear the GPE status bit now. Note that
|
|
* level-triggered events are cleared after the GPE is serviced.
|
|
*/
|
|
if ((gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK) ==
|
|
ACPI_GPE_EDGE_TRIGGERED) {
|
|
status = acpi_hw_clear_gpe(gpe_event_info);
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_EXCEPTION((AE_INFO, status,
|
|
"Unable to clear GPE%02X", gpe_number));
|
|
return_UINT32(ACPI_INTERRUPT_NOT_HANDLED);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Always disable the GPE so that it does not keep firing before
|
|
* any asynchronous activity completes (either from the execution
|
|
* of a GPE method or an asynchronous GPE handler.)
|
|
*
|
|
* If there is no handler or method to run, just disable the
|
|
* GPE and leave it disabled permanently to prevent further such
|
|
* pointless events from firing.
|
|
*/
|
|
status = acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_DISABLE);
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_EXCEPTION((AE_INFO, status,
|
|
"Unable to disable GPE%02X", gpe_number));
|
|
return_UINT32(ACPI_INTERRUPT_NOT_HANDLED);
|
|
}
|
|
|
|
/*
|
|
* Dispatch the GPE to either an installed handler or the control
|
|
* method associated with this GPE (_Lxx or _Exx). If a handler
|
|
* exists, we invoke it and do not attempt to run the method.
|
|
* If there is neither a handler nor a method, leave the GPE
|
|
* disabled.
|
|
*/
|
|
switch (gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) {
|
|
case ACPI_GPE_DISPATCH_HANDLER:
|
|
|
|
/* Invoke the installed handler (at interrupt level) */
|
|
|
|
return_value =
|
|
gpe_event_info->dispatch.handler->address(gpe_device,
|
|
gpe_number,
|
|
gpe_event_info->
|
|
dispatch.handler->
|
|
context);
|
|
|
|
/* If requested, clear (if level-triggered) and reenable the GPE */
|
|
|
|
if (return_value & ACPI_REENABLE_GPE) {
|
|
(void)acpi_ev_finish_gpe(gpe_event_info);
|
|
}
|
|
break;
|
|
|
|
case ACPI_GPE_DISPATCH_METHOD:
|
|
case ACPI_GPE_DISPATCH_NOTIFY:
|
|
|
|
/*
|
|
* Execute the method associated with the GPE
|
|
* NOTE: Level-triggered GPEs are cleared after the method completes.
|
|
*/
|
|
status = acpi_os_execute(OSL_GPE_HANDLER,
|
|
acpi_ev_asynch_execute_gpe_method,
|
|
gpe_event_info);
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_EXCEPTION((AE_INFO, status,
|
|
"Unable to queue handler for GPE%2X - event disabled",
|
|
gpe_number));
|
|
}
|
|
break;
|
|
|
|
default:
|
|
|
|
/*
|
|
* No handler or method to run!
|
|
* 03/2010: This case should no longer be possible. We will not allow
|
|
* a GPE to be enabled if it has no handler or method.
|
|
*/
|
|
ACPI_ERROR((AE_INFO,
|
|
"No handler or method for GPE%02X, disabling event",
|
|
gpe_number));
|
|
|
|
break;
|
|
}
|
|
|
|
return_UINT32(ACPI_INTERRUPT_HANDLED);
|
|
}
|