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![Rafael J. Wysocki](/assets/img/avatar_default.png)
Runtime GPEs have corresponding _Lxx/_Exx methods and are enabled automatically during the initialization of the ACPI subsystem through acpi_update_all_gpes() with the assumption that acpi_setup_gpe_for_wake() will be called in advance for all of the GPEs pointed to by _PRW objects in the namespace that may be affected by acpi_update_all_gpes(). That is, acpi_ev_initialize_gpe_block() can only be called for a GPE block after acpi_setup_gpe_for_wake() has been called for all of the _PRW (wakeup) GPEs in it. The platform firmware on some systems, however, expects GPEs to be enabled before the enumeration of devices which is when acpi_setup_gpe_for_wake() is called and that goes against the above assumption. For this reason, introduce a new flag to be set by acpi_ev_initialize_gpe_block() when automatically enabling a GPE to indicate to acpi_setup_gpe_for_wake() that it needs to drop the reference to the GPE coming from acpi_ev_initialize_gpe_block() and modify acpi_setup_gpe_for_wake() accordingly. These changes allow acpi_setup_gpe_for_wake() and acpi_ev_initialize_gpe_block() to be invoked in any order. Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> Tested-by: Mika Westerberg <mika.westerberg@linux.intel.com>
1003 lines
29 KiB
C
1003 lines
29 KiB
C
/******************************************************************************
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*
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* Module Name: evxfgpe - External Interfaces for General Purpose Events (GPEs)
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2017, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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*/
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#define EXPORT_ACPI_INTERFACES
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#include <acpi/acpi.h>
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#include "accommon.h"
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#include "acevents.h"
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#include "acnamesp.h"
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#define _COMPONENT ACPI_EVENTS
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ACPI_MODULE_NAME("evxfgpe")
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#if (!ACPI_REDUCED_HARDWARE) /* Entire module */
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/*******************************************************************************
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*
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* FUNCTION: acpi_update_all_gpes
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*
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* PARAMETERS: None
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*
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* RETURN: Status
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*
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* DESCRIPTION: Complete GPE initialization and enable all GPEs that have
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* associated _Lxx or _Exx methods and are not pointed to by any
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* device _PRW methods (this indicates that these GPEs are
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* generally intended for system or device wakeup. Such GPEs
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* have to be enabled directly when the devices whose _PRW
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* methods point to them are set up for wakeup signaling.)
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*
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* NOTE: Should be called after any GPEs are added to the system. Primarily,
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* after the system _PRW methods have been run, but also after a GPE Block
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* Device has been added or if any new GPE methods have been added via a
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* dynamic table load.
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*
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******************************************************************************/
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acpi_status acpi_update_all_gpes(void)
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{
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acpi_status status;
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ACPI_FUNCTION_TRACE(acpi_update_all_gpes);
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status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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if (acpi_gbl_all_gpes_initialized) {
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goto unlock_and_exit;
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}
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status = acpi_ev_walk_gpe_list(acpi_ev_initialize_gpe_block, NULL);
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if (ACPI_SUCCESS(status)) {
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acpi_gbl_all_gpes_initialized = TRUE;
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}
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unlock_and_exit:
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(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
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return_ACPI_STATUS(status);
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}
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ACPI_EXPORT_SYMBOL(acpi_update_all_gpes)
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/*******************************************************************************
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*
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* FUNCTION: acpi_enable_gpe
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*
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* PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
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* gpe_number - GPE level within the GPE block
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*
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* RETURN: Status
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*
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* DESCRIPTION: Add a reference to a GPE. On the first reference, the GPE is
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* hardware-enabled.
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*
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******************************************************************************/
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acpi_status acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number)
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{
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acpi_status status = AE_BAD_PARAMETER;
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struct acpi_gpe_event_info *gpe_event_info;
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acpi_cpu_flags flags;
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ACPI_FUNCTION_TRACE(acpi_enable_gpe);
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flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
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/*
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* Ensure that we have a valid GPE number and that there is some way
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* of handling the GPE (handler or a GPE method). In other words, we
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* won't allow a valid GPE to be enabled if there is no way to handle it.
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*/
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gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
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if (gpe_event_info) {
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if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) !=
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ACPI_GPE_DISPATCH_NONE) {
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status = acpi_ev_add_gpe_reference(gpe_event_info);
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} else {
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status = AE_NO_HANDLER;
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}
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}
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acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
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return_ACPI_STATUS(status);
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}
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ACPI_EXPORT_SYMBOL(acpi_enable_gpe)
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/*******************************************************************************
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*
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* FUNCTION: acpi_disable_gpe
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*
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* PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
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* gpe_number - GPE level within the GPE block
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*
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* RETURN: Status
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*
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* DESCRIPTION: Remove a reference to a GPE. When the last reference is
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* removed, only then is the GPE disabled (for runtime GPEs), or
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* the GPE mask bit disabled (for wake GPEs)
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*
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******************************************************************************/
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acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number)
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{
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acpi_status status = AE_BAD_PARAMETER;
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struct acpi_gpe_event_info *gpe_event_info;
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acpi_cpu_flags flags;
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ACPI_FUNCTION_TRACE(acpi_disable_gpe);
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flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
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/* Ensure that we have a valid GPE number */
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gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
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if (gpe_event_info) {
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status = acpi_ev_remove_gpe_reference(gpe_event_info) ;
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}
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acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
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return_ACPI_STATUS(status);
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}
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ACPI_EXPORT_SYMBOL(acpi_disable_gpe)
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/*******************************************************************************
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*
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* FUNCTION: acpi_set_gpe
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*
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* PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
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* gpe_number - GPE level within the GPE block
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* action - ACPI_GPE_ENABLE or ACPI_GPE_DISABLE
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*
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* RETURN: Status
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*
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* DESCRIPTION: Enable or disable an individual GPE. This function bypasses
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* the reference count mechanism used in the acpi_enable_gpe(),
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* acpi_disable_gpe() interfaces.
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* This API is typically used by the GPE raw handler mode driver
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* to switch between the polling mode and the interrupt mode after
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* the driver has enabled the GPE.
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* The APIs should be invoked in this order:
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* acpi_enable_gpe() <- Ensure the reference count > 0
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* acpi_set_gpe(ACPI_GPE_DISABLE) <- Enter polling mode
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* acpi_set_gpe(ACPI_GPE_ENABLE) <- Leave polling mode
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* acpi_disable_gpe() <- Decrease the reference count
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*
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* Note: If a GPE is shared by 2 silicon components, then both the drivers
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* should support GPE polling mode or disabling the GPE for long period
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* for one driver may break the other. So use it with care since all
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* firmware _Lxx/_Exx handlers currently rely on the GPE interrupt mode.
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*
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******************************************************************************/
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acpi_status acpi_set_gpe(acpi_handle gpe_device, u32 gpe_number, u8 action)
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{
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struct acpi_gpe_event_info *gpe_event_info;
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acpi_status status;
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acpi_cpu_flags flags;
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ACPI_FUNCTION_TRACE(acpi_set_gpe);
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flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
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/* Ensure that we have a valid GPE number */
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gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
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if (!gpe_event_info) {
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status = AE_BAD_PARAMETER;
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goto unlock_and_exit;
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}
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/* Perform the action */
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switch (action) {
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case ACPI_GPE_ENABLE:
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status = acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_ENABLE);
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gpe_event_info->disable_for_dispatch = FALSE;
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break;
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case ACPI_GPE_DISABLE:
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status = acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_DISABLE);
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gpe_event_info->disable_for_dispatch = TRUE;
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break;
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default:
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status = AE_BAD_PARAMETER;
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break;
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}
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unlock_and_exit:
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acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
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return_ACPI_STATUS(status);
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}
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ACPI_EXPORT_SYMBOL(acpi_set_gpe)
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/*******************************************************************************
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*
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* FUNCTION: acpi_mask_gpe
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*
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* PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
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* gpe_number - GPE level within the GPE block
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* is_masked - Whether the GPE is masked or not
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*
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* RETURN: Status
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*
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* DESCRIPTION: Unconditionally mask/unmask the an individual GPE, ex., to
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* prevent a GPE flooding.
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*
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******************************************************************************/
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acpi_status acpi_mask_gpe(acpi_handle gpe_device, u32 gpe_number, u8 is_masked)
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{
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struct acpi_gpe_event_info *gpe_event_info;
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acpi_status status;
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acpi_cpu_flags flags;
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ACPI_FUNCTION_TRACE(acpi_mask_gpe);
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flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
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/* Ensure that we have a valid GPE number */
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gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
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if (!gpe_event_info) {
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status = AE_BAD_PARAMETER;
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goto unlock_and_exit;
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}
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status = acpi_ev_mask_gpe(gpe_event_info, is_masked);
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unlock_and_exit:
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acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
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return_ACPI_STATUS(status);
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}
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ACPI_EXPORT_SYMBOL(acpi_mask_gpe)
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/*******************************************************************************
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*
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* FUNCTION: acpi_mark_gpe_for_wake
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*
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* PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
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* gpe_number - GPE level within the GPE block
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*
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* RETURN: Status
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*
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* DESCRIPTION: Mark a GPE as having the ability to wake the system. Simply
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* sets the ACPI_GPE_CAN_WAKE flag.
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*
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* Some potential callers of acpi_setup_gpe_for_wake may know in advance that
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* there won't be any notify handlers installed for device wake notifications
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* from the given GPE (one example is a button GPE in Linux). For these cases,
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* acpi_mark_gpe_for_wake should be used instead of acpi_setup_gpe_for_wake.
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* This will set the ACPI_GPE_CAN_WAKE flag for the GPE without trying to
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* setup implicit wake notification for it (since there's no handler method).
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*
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******************************************************************************/
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acpi_status acpi_mark_gpe_for_wake(acpi_handle gpe_device, u32 gpe_number)
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{
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struct acpi_gpe_event_info *gpe_event_info;
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acpi_status status = AE_BAD_PARAMETER;
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acpi_cpu_flags flags;
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ACPI_FUNCTION_TRACE(acpi_mark_gpe_for_wake);
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flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
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/* Ensure that we have a valid GPE number */
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gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
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if (gpe_event_info) {
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/* Mark the GPE as a possible wake event */
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gpe_event_info->flags |= ACPI_GPE_CAN_WAKE;
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status = AE_OK;
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}
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acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
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return_ACPI_STATUS(status);
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}
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ACPI_EXPORT_SYMBOL(acpi_mark_gpe_for_wake)
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/*******************************************************************************
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*
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* FUNCTION: acpi_setup_gpe_for_wake
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*
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* PARAMETERS: wake_device - Device associated with the GPE (via _PRW)
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* gpe_device - Parent GPE Device. NULL for GPE0/GPE1
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* gpe_number - GPE level within the GPE block
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*
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* RETURN: Status
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*
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* DESCRIPTION: Mark a GPE as having the ability to wake the system. This
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* interface is intended to be used as the host executes the
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* _PRW methods (Power Resources for Wake) in the system tables.
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* Each _PRW appears under a Device Object (The wake_device), and
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* contains the info for the wake GPE associated with the
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* wake_device.
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*
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******************************************************************************/
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acpi_status
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acpi_setup_gpe_for_wake(acpi_handle wake_device,
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acpi_handle gpe_device, u32 gpe_number)
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{
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acpi_status status;
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struct acpi_gpe_event_info *gpe_event_info;
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struct acpi_namespace_node *device_node;
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struct acpi_gpe_notify_info *notify;
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struct acpi_gpe_notify_info *new_notify;
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acpi_cpu_flags flags;
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ACPI_FUNCTION_TRACE(acpi_setup_gpe_for_wake);
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/* Parameter Validation */
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if (!wake_device) {
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/*
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* By forcing wake_device to be valid, we automatically enable the
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* implicit notify feature on all hosts.
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*/
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return_ACPI_STATUS(AE_BAD_PARAMETER);
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}
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/* Handle root object case */
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if (wake_device == ACPI_ROOT_OBJECT) {
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device_node = acpi_gbl_root_node;
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} else {
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device_node =
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ACPI_CAST_PTR(struct acpi_namespace_node, wake_device);
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}
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|
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/* Validate wake_device is of type Device */
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|
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if (device_node->type != ACPI_TYPE_DEVICE) {
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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/*
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* Allocate a new notify object up front, in case it is needed.
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* Memory allocation while holding a spinlock is a big no-no
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* on some hosts.
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*/
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new_notify = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_notify_info));
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if (!new_notify) {
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return_ACPI_STATUS(AE_NO_MEMORY);
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}
|
|
|
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flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
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|
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/* Ensure that we have a valid GPE number */
|
|
|
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gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
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if (!gpe_event_info) {
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status = AE_BAD_PARAMETER;
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goto unlock_and_exit;
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}
|
|
|
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/*
|
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* If there is no method or handler for this GPE, then the
|
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* wake_device will be notified whenever this GPE fires. This is
|
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* known as an "implicit notify". Note: The GPE is assumed to be
|
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* level-triggered (for windows compatibility).
|
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*/
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if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
|
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ACPI_GPE_DISPATCH_NONE) {
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/*
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* This is the first device for implicit notify on this GPE.
|
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* Just set the flags here, and enter the NOTIFY block below.
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*/
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gpe_event_info->flags =
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(ACPI_GPE_DISPATCH_NOTIFY | ACPI_GPE_LEVEL_TRIGGERED);
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} else if (gpe_event_info->flags & ACPI_GPE_AUTO_ENABLED) {
|
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/*
|
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* A reference to this GPE has been added during the GPE block
|
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* initialization, so drop it now to prevent the GPE from being
|
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* permanently enabled and clear its ACPI_GPE_AUTO_ENABLED flag.
|
|
*/
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(void)acpi_ev_remove_gpe_reference(gpe_event_info);
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gpe_event_info->flags &= ~ACPI_GPE_AUTO_ENABLED;
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}
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|
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/*
|
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* If we already have an implicit notify on this GPE, add
|
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* this device to the notify list.
|
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*/
|
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if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
|
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ACPI_GPE_DISPATCH_NOTIFY) {
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|
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/* Ensure that the device is not already in the list */
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|
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notify = gpe_event_info->dispatch.notify_list;
|
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while (notify) {
|
|
if (notify->device_node == device_node) {
|
|
status = AE_ALREADY_EXISTS;
|
|
goto unlock_and_exit;
|
|
}
|
|
notify = notify->next;
|
|
}
|
|
|
|
/* Add this device to the notify list for this GPE */
|
|
|
|
new_notify->device_node = device_node;
|
|
new_notify->next = gpe_event_info->dispatch.notify_list;
|
|
gpe_event_info->dispatch.notify_list = new_notify;
|
|
new_notify = NULL;
|
|
}
|
|
|
|
/* Mark the GPE as a possible wake event */
|
|
|
|
gpe_event_info->flags |= ACPI_GPE_CAN_WAKE;
|
|
status = AE_OK;
|
|
|
|
unlock_and_exit:
|
|
acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
|
|
|
|
/* Delete the notify object if it was not used above */
|
|
|
|
if (new_notify) {
|
|
ACPI_FREE(new_notify);
|
|
}
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
ACPI_EXPORT_SYMBOL(acpi_setup_gpe_for_wake)
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_set_gpe_wake_mask
|
|
*
|
|
* PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
|
|
* gpe_number - GPE level within the GPE block
|
|
* action - Enable or Disable
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Set or clear the GPE's wakeup enable mask bit. The GPE must
|
|
* already be marked as a WAKE GPE.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_set_gpe_wake_mask(acpi_handle gpe_device, u32 gpe_number, u8 action)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
struct acpi_gpe_event_info *gpe_event_info;
|
|
struct acpi_gpe_register_info *gpe_register_info;
|
|
acpi_cpu_flags flags;
|
|
u32 register_bit;
|
|
|
|
ACPI_FUNCTION_TRACE(acpi_set_gpe_wake_mask);
|
|
|
|
flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
|
|
|
|
/*
|
|
* Ensure that we have a valid GPE number and that this GPE is in
|
|
* fact a wake GPE
|
|
*/
|
|
gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
|
|
if (!gpe_event_info) {
|
|
status = AE_BAD_PARAMETER;
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
if (!(gpe_event_info->flags & ACPI_GPE_CAN_WAKE)) {
|
|
status = AE_TYPE;
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
gpe_register_info = gpe_event_info->register_info;
|
|
if (!gpe_register_info) {
|
|
status = AE_NOT_EXIST;
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
register_bit = acpi_hw_get_gpe_register_bit(gpe_event_info);
|
|
|
|
/* Perform the action */
|
|
|
|
switch (action) {
|
|
case ACPI_GPE_ENABLE:
|
|
|
|
ACPI_SET_BIT(gpe_register_info->enable_for_wake,
|
|
(u8)register_bit);
|
|
break;
|
|
|
|
case ACPI_GPE_DISABLE:
|
|
|
|
ACPI_CLEAR_BIT(gpe_register_info->enable_for_wake,
|
|
(u8)register_bit);
|
|
break;
|
|
|
|
default:
|
|
|
|
ACPI_ERROR((AE_INFO, "%u, Invalid action", action));
|
|
status = AE_BAD_PARAMETER;
|
|
break;
|
|
}
|
|
|
|
unlock_and_exit:
|
|
acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL(acpi_set_gpe_wake_mask)
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_clear_gpe
|
|
*
|
|
* PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
|
|
* gpe_number - GPE level within the GPE block
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Clear an ACPI event (general purpose)
|
|
*
|
|
******************************************************************************/
|
|
acpi_status acpi_clear_gpe(acpi_handle gpe_device, u32 gpe_number)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
struct acpi_gpe_event_info *gpe_event_info;
|
|
acpi_cpu_flags flags;
|
|
|
|
ACPI_FUNCTION_TRACE(acpi_clear_gpe);
|
|
|
|
flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
|
|
|
|
/* Ensure that we have a valid GPE number */
|
|
|
|
gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
|
|
if (!gpe_event_info) {
|
|
status = AE_BAD_PARAMETER;
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
status = acpi_hw_clear_gpe(gpe_event_info);
|
|
|
|
unlock_and_exit:
|
|
acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL(acpi_clear_gpe)
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_get_gpe_status
|
|
*
|
|
* PARAMETERS: gpe_device - Parent GPE Device. NULL for GPE0/GPE1
|
|
* gpe_number - GPE level within the GPE block
|
|
* event_status - Where the current status of the event
|
|
* will be returned
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Get the current status of a GPE (signalled/not_signalled)
|
|
*
|
|
******************************************************************************/
|
|
acpi_status
|
|
acpi_get_gpe_status(acpi_handle gpe_device,
|
|
u32 gpe_number, acpi_event_status *event_status)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
struct acpi_gpe_event_info *gpe_event_info;
|
|
acpi_cpu_flags flags;
|
|
|
|
ACPI_FUNCTION_TRACE(acpi_get_gpe_status);
|
|
|
|
flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
|
|
|
|
/* Ensure that we have a valid GPE number */
|
|
|
|
gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
|
|
if (!gpe_event_info) {
|
|
status = AE_BAD_PARAMETER;
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
/* Obtain status on the requested GPE number */
|
|
|
|
status = acpi_hw_get_gpe_status(gpe_event_info, event_status);
|
|
|
|
unlock_and_exit:
|
|
acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL(acpi_get_gpe_status)
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_finish_gpe
|
|
*
|
|
* PARAMETERS: gpe_device - Namespace node for the GPE Block
|
|
* (NULL for FADT defined GPEs)
|
|
* gpe_number - GPE level within the GPE block
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Clear and conditionally reenable a GPE. This completes the GPE
|
|
* processing. Intended for use by asynchronous host-installed
|
|
* GPE handlers. The GPE is only reenabled if the enable_for_run bit
|
|
* is set in the GPE info.
|
|
*
|
|
******************************************************************************/
|
|
acpi_status acpi_finish_gpe(acpi_handle gpe_device, u32 gpe_number)
|
|
{
|
|
struct acpi_gpe_event_info *gpe_event_info;
|
|
acpi_status status;
|
|
acpi_cpu_flags flags;
|
|
|
|
ACPI_FUNCTION_TRACE(acpi_finish_gpe);
|
|
|
|
flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
|
|
|
|
/* Ensure that we have a valid GPE number */
|
|
|
|
gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number);
|
|
if (!gpe_event_info) {
|
|
status = AE_BAD_PARAMETER;
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
status = acpi_ev_finish_gpe(gpe_event_info);
|
|
|
|
unlock_and_exit:
|
|
acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL(acpi_finish_gpe)
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_disable_all_gpes
|
|
*
|
|
* PARAMETERS: None
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Disable and clear all GPEs in all GPE blocks
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status acpi_disable_all_gpes(void)
|
|
{
|
|
acpi_status status;
|
|
|
|
ACPI_FUNCTION_TRACE(acpi_disable_all_gpes);
|
|
|
|
status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
|
|
if (ACPI_FAILURE(status)) {
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
status = acpi_hw_disable_all_gpes();
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
|
|
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL(acpi_disable_all_gpes)
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_enable_all_runtime_gpes
|
|
*
|
|
* PARAMETERS: None
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Enable all "runtime" GPEs, in all GPE blocks
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status acpi_enable_all_runtime_gpes(void)
|
|
{
|
|
acpi_status status;
|
|
|
|
ACPI_FUNCTION_TRACE(acpi_enable_all_runtime_gpes);
|
|
|
|
status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
|
|
if (ACPI_FAILURE(status)) {
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
status = acpi_hw_enable_all_runtime_gpes();
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
|
|
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL(acpi_enable_all_runtime_gpes)
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_enable_all_wakeup_gpes
|
|
*
|
|
* PARAMETERS: None
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Enable all "wakeup" GPEs and disable all of the other GPEs, in
|
|
* all GPE blocks.
|
|
*
|
|
******************************************************************************/
|
|
acpi_status acpi_enable_all_wakeup_gpes(void)
|
|
{
|
|
acpi_status status;
|
|
|
|
ACPI_FUNCTION_TRACE(acpi_enable_all_wakeup_gpes);
|
|
|
|
status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
|
|
if (ACPI_FAILURE(status)) {
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
status = acpi_hw_enable_all_wakeup_gpes();
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
|
|
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL(acpi_enable_all_wakeup_gpes)
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_install_gpe_block
|
|
*
|
|
* PARAMETERS: gpe_device - Handle to the parent GPE Block Device
|
|
* gpe_block_address - Address and space_ID
|
|
* register_count - Number of GPE register pairs in the block
|
|
* interrupt_number - H/W interrupt for the block
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Create and Install a block of GPE registers. The GPEs are not
|
|
* enabled here.
|
|
*
|
|
******************************************************************************/
|
|
acpi_status
|
|
acpi_install_gpe_block(acpi_handle gpe_device,
|
|
struct acpi_generic_address *gpe_block_address,
|
|
u32 register_count, u32 interrupt_number)
|
|
{
|
|
acpi_status status;
|
|
union acpi_operand_object *obj_desc;
|
|
struct acpi_namespace_node *node;
|
|
struct acpi_gpe_block_info *gpe_block;
|
|
|
|
ACPI_FUNCTION_TRACE(acpi_install_gpe_block);
|
|
|
|
if ((!gpe_device) || (!gpe_block_address) || (!register_count)) {
|
|
return_ACPI_STATUS(AE_BAD_PARAMETER);
|
|
}
|
|
|
|
status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
|
|
if (ACPI_FAILURE(status)) {
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
node = acpi_ns_validate_handle(gpe_device);
|
|
if (!node) {
|
|
status = AE_BAD_PARAMETER;
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
/* Validate the parent device */
|
|
|
|
if (node->type != ACPI_TYPE_DEVICE) {
|
|
status = AE_TYPE;
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
if (node->object) {
|
|
status = AE_ALREADY_EXISTS;
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
/*
|
|
* For user-installed GPE Block Devices, the gpe_block_base_number
|
|
* is always zero
|
|
*/
|
|
status = acpi_ev_create_gpe_block(node, gpe_block_address->address,
|
|
gpe_block_address->space_id,
|
|
register_count, 0, interrupt_number,
|
|
&gpe_block);
|
|
if (ACPI_FAILURE(status)) {
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
/* Install block in the device_object attached to the node */
|
|
|
|
obj_desc = acpi_ns_get_attached_object(node);
|
|
if (!obj_desc) {
|
|
|
|
/*
|
|
* No object, create a new one (Device nodes do not always have
|
|
* an attached object)
|
|
*/
|
|
obj_desc = acpi_ut_create_internal_object(ACPI_TYPE_DEVICE);
|
|
if (!obj_desc) {
|
|
status = AE_NO_MEMORY;
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
status =
|
|
acpi_ns_attach_object(node, obj_desc, ACPI_TYPE_DEVICE);
|
|
|
|
/* Remove local reference to the object */
|
|
|
|
acpi_ut_remove_reference(obj_desc);
|
|
|
|
if (ACPI_FAILURE(status)) {
|
|
goto unlock_and_exit;
|
|
}
|
|
}
|
|
|
|
/* Now install the GPE block in the device_object */
|
|
|
|
obj_desc->device.gpe_block = gpe_block;
|
|
|
|
unlock_and_exit:
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL(acpi_install_gpe_block)
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_remove_gpe_block
|
|
*
|
|
* PARAMETERS: gpe_device - Handle to the parent GPE Block Device
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Remove a previously installed block of GPE registers
|
|
*
|
|
******************************************************************************/
|
|
acpi_status acpi_remove_gpe_block(acpi_handle gpe_device)
|
|
{
|
|
union acpi_operand_object *obj_desc;
|
|
acpi_status status;
|
|
struct acpi_namespace_node *node;
|
|
|
|
ACPI_FUNCTION_TRACE(acpi_remove_gpe_block);
|
|
|
|
if (!gpe_device) {
|
|
return_ACPI_STATUS(AE_BAD_PARAMETER);
|
|
}
|
|
|
|
status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
|
|
if (ACPI_FAILURE(status)) {
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
node = acpi_ns_validate_handle(gpe_device);
|
|
if (!node) {
|
|
status = AE_BAD_PARAMETER;
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
/* Validate the parent device */
|
|
|
|
if (node->type != ACPI_TYPE_DEVICE) {
|
|
status = AE_TYPE;
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
/* Get the device_object attached to the node */
|
|
|
|
obj_desc = acpi_ns_get_attached_object(node);
|
|
if (!obj_desc || !obj_desc->device.gpe_block) {
|
|
return_ACPI_STATUS(AE_NULL_OBJECT);
|
|
}
|
|
|
|
/* Delete the GPE block (but not the device_object) */
|
|
|
|
status = acpi_ev_delete_gpe_block(obj_desc->device.gpe_block);
|
|
if (ACPI_SUCCESS(status)) {
|
|
obj_desc->device.gpe_block = NULL;
|
|
}
|
|
|
|
unlock_and_exit:
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL(acpi_remove_gpe_block)
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_get_gpe_device
|
|
*
|
|
* PARAMETERS: index - System GPE index (0-current_gpe_count)
|
|
* gpe_device - Where the parent GPE Device is returned
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Obtain the GPE device associated with the input index. A NULL
|
|
* gpe device indicates that the gpe number is contained in one of
|
|
* the FADT-defined gpe blocks. Otherwise, the GPE block device.
|
|
*
|
|
******************************************************************************/
|
|
acpi_status acpi_get_gpe_device(u32 index, acpi_handle *gpe_device)
|
|
{
|
|
struct acpi_gpe_device_info info;
|
|
acpi_status status;
|
|
|
|
ACPI_FUNCTION_TRACE(acpi_get_gpe_device);
|
|
|
|
if (!gpe_device) {
|
|
return_ACPI_STATUS(AE_BAD_PARAMETER);
|
|
}
|
|
|
|
if (index >= acpi_current_gpe_count) {
|
|
return_ACPI_STATUS(AE_NOT_EXIST);
|
|
}
|
|
|
|
/* Setup and walk the GPE list */
|
|
|
|
info.index = index;
|
|
info.status = AE_NOT_EXIST;
|
|
info.gpe_device = NULL;
|
|
info.next_block_base_index = 0;
|
|
|
|
status = acpi_ev_walk_gpe_list(acpi_ev_get_gpe_device, &info);
|
|
if (ACPI_FAILURE(status)) {
|
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return_ACPI_STATUS(status);
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|
}
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|
|
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*gpe_device = ACPI_CAST_PTR(acpi_handle, info.gpe_device);
|
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return_ACPI_STATUS(info.status);
|
|
}
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|
|
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ACPI_EXPORT_SYMBOL(acpi_get_gpe_device)
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#endif /* !ACPI_REDUCED_HARDWARE */
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