6f42ccf2fc
Implemented support for PCI Express root bridges -- added support for device PNP0A08 in the root bridge search within AcpiEvPciConfigRegionSetup. acpi_ev_pci_config_region_setup(). The interpreter now automatically truncates incoming 64-bit constants to 32 bits if currently executing out of a 32-bit ACPI table (Revision < 2). This also affects the iASL compiler constant folding. (Note: as per below, the iASL compiler no longer allows 64-bit constants within 32-bit tables.) Fixed a problem where string and buffer objects with "static" pointers (pointers to initialization data within an ACPI table) were not handled consistently. The internal object copy operation now always copies the data to a newly allocated buffer, regardless of whether the source object is static or not. Fixed a problem with the FromBCD operator where an implicit result conversion was improperly performed while storing the result to the target operand. Since this is an "explicit conversion" operator, the implicit conversion should never be performed on the output. Fixed a problem with the CopyObject operator where a copy to an existing named object did not always completely overwrite the existing object stored at name. Specifically, a buffer-to-buffer copy did not delete the existing buffer. Replaced "interrupt_level" with "interrupt_number" in all GPE interfaces and structs for consistency. Signed-off-by: Len Brown <len.brown@intel.com>
784 lines
20 KiB
C
784 lines
20 KiB
C
/******************************************************************************
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*
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* Module Name: evxfevnt - External Interfaces, ACPI event disable/enable
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2005, R. Byron Moore
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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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#include <linux/module.h>
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#include <acpi/acpi.h>
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#include <acpi/acevents.h>
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#include <acpi/acnamesp.h>
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#define _COMPONENT ACPI_EVENTS
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ACPI_MODULE_NAME ("evxfevnt")
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/*******************************************************************************
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*
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* FUNCTION: acpi_enable
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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: Transfers the system into ACPI mode.
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*
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******************************************************************************/
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acpi_status
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acpi_enable (
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void)
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{
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acpi_status status = AE_OK;
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|
|
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ACPI_FUNCTION_TRACE ("acpi_enable");
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|
|
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/* Make sure we have the FADT*/
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if (!acpi_gbl_FADT) {
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ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "No FADT information present!\n"));
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return_ACPI_STATUS (AE_NO_ACPI_TABLES);
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}
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|
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if (acpi_hw_get_mode() == ACPI_SYS_MODE_ACPI) {
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ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "System is already in ACPI mode\n"));
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}
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else {
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/* Transition to ACPI mode */
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status = acpi_hw_set_mode (ACPI_SYS_MODE_ACPI);
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if (ACPI_FAILURE (status)) {
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ACPI_REPORT_ERROR (("Could not transition to ACPI mode.\n"));
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return_ACPI_STATUS (status);
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}
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|
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ACPI_DEBUG_PRINT ((ACPI_DB_INIT,
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"Transition to ACPI mode successful\n"));
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}
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|
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return_ACPI_STATUS (status);
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}
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|
|
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|
/*******************************************************************************
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*
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* FUNCTION: acpi_disable
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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: Transfers the system into LEGACY (non-ACPI) mode.
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*
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******************************************************************************/
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acpi_status
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acpi_disable (
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void)
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{
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acpi_status status = AE_OK;
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|
|
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ACPI_FUNCTION_TRACE ("acpi_disable");
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|
|
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if (!acpi_gbl_FADT) {
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ACPI_DEBUG_PRINT ((ACPI_DB_WARN, "No FADT information present!\n"));
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return_ACPI_STATUS (AE_NO_ACPI_TABLES);
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}
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|
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if (acpi_hw_get_mode() == ACPI_SYS_MODE_LEGACY) {
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ACPI_DEBUG_PRINT ((ACPI_DB_INIT,
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"System is already in legacy (non-ACPI) mode\n"));
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}
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else {
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/* Transition to LEGACY mode */
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status = acpi_hw_set_mode (ACPI_SYS_MODE_LEGACY);
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if (ACPI_FAILURE (status)) {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
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"Could not exit ACPI mode to legacy mode"));
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return_ACPI_STATUS (status);
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}
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ACPI_DEBUG_PRINT ((ACPI_DB_INIT, "ACPI mode disabled\n"));
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}
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return_ACPI_STATUS (status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_enable_event
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*
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* PARAMETERS: Event - The fixed eventto be enabled
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* Flags - Reserved
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*
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* RETURN: Status
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*
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* DESCRIPTION: Enable an ACPI event (fixed)
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*
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******************************************************************************/
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acpi_status
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acpi_enable_event (
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u32 event,
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u32 flags)
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{
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acpi_status status = AE_OK;
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u32 value;
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ACPI_FUNCTION_TRACE ("acpi_enable_event");
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|
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/* Decode the Fixed Event */
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if (event > ACPI_EVENT_MAX) {
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return_ACPI_STATUS (AE_BAD_PARAMETER);
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}
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/*
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* Enable the requested fixed event (by writing a one to the
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* enable register bit)
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*/
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status = acpi_set_register (acpi_gbl_fixed_event_info[event].enable_register_id,
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1, ACPI_MTX_LOCK);
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if (ACPI_FAILURE (status)) {
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return_ACPI_STATUS (status);
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}
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/* Make sure that the hardware responded */
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status = acpi_get_register (acpi_gbl_fixed_event_info[event].enable_register_id,
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&value, ACPI_MTX_LOCK);
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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 (value != 1) {
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ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
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"Could not enable %s event\n", acpi_ut_get_event_name (event)));
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return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE);
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}
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return_ACPI_STATUS (status);
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}
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EXPORT_SYMBOL(acpi_enable_event);
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/*******************************************************************************
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*
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* FUNCTION: acpi_set_gpe_type
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*
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* PARAMETERS: gpe_device - Parent GPE Device
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* gpe_number - GPE level within the GPE block
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* Type - New GPE type
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*
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* RETURN: Status
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*
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* DESCRIPTION: Set the type of an individual GPE
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*
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******************************************************************************/
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acpi_status
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acpi_set_gpe_type (
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acpi_handle gpe_device,
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u32 gpe_number,
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u8 type)
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{
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acpi_status status = AE_OK;
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struct acpi_gpe_event_info *gpe_event_info;
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|
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ACPI_FUNCTION_TRACE ("acpi_set_gpe_type");
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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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if ((gpe_event_info->flags & ACPI_GPE_TYPE_MASK) == type) {
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return_ACPI_STATUS (AE_OK);
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}
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/* Set the new type (will disable GPE if currently enabled) */
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status = acpi_ev_set_gpe_type (gpe_event_info, type);
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unlock_and_exit:
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return_ACPI_STATUS (status);
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}
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EXPORT_SYMBOL(acpi_set_gpe_type);
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|
|
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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
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* gpe_number - GPE level within the GPE block
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* Flags - Just enable, or also wake enable?
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* Called from ISR or not
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*
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* RETURN: Status
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*
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* DESCRIPTION: Enable an ACPI event (general purpose)
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*
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******************************************************************************/
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acpi_status
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acpi_enable_gpe (
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acpi_handle gpe_device,
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u32 gpe_number,
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u32 flags)
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{
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acpi_status status = AE_OK;
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struct acpi_gpe_event_info *gpe_event_info;
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|
|
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ACPI_FUNCTION_TRACE ("acpi_enable_gpe");
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|
|
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/* Use semaphore lock if not executing at interrupt level */
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if (flags & ACPI_NOT_ISR) {
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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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}
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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 enable */
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status = acpi_ev_enable_gpe (gpe_event_info, TRUE);
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unlock_and_exit:
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if (flags & ACPI_NOT_ISR) {
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(void) acpi_ut_release_mutex (ACPI_MTX_EVENTS);
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}
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return_ACPI_STATUS (status);
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}
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EXPORT_SYMBOL(acpi_enable_gpe);
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|
|
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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
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* gpe_number - GPE level within the GPE block
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* Flags - Just disable, or also wake disable?
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* Called from ISR or not
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*
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* RETURN: Status
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*
|
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* DESCRIPTION: Disable an ACPI event (general purpose)
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*
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******************************************************************************/
|
|
|
|
acpi_status
|
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acpi_disable_gpe (
|
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acpi_handle gpe_device,
|
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u32 gpe_number,
|
|
u32 flags)
|
|
{
|
|
acpi_status status = AE_OK;
|
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struct acpi_gpe_event_info *gpe_event_info;
|
|
|
|
|
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ACPI_FUNCTION_TRACE ("acpi_disable_gpe");
|
|
|
|
|
|
/* Use semaphore lock if not executing at interrupt level */
|
|
|
|
if (flags & ACPI_NOT_ISR) {
|
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status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS);
|
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if (ACPI_FAILURE (status)) {
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
}
|
|
|
|
/* 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;
|
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goto unlock_and_exit;
|
|
}
|
|
|
|
status = acpi_ev_disable_gpe (gpe_event_info);
|
|
|
|
unlock_and_exit:
|
|
if (flags & ACPI_NOT_ISR) {
|
|
(void) acpi_ut_release_mutex (ACPI_MTX_EVENTS);
|
|
}
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_disable_event
|
|
*
|
|
* PARAMETERS: Event - The fixed eventto be enabled
|
|
* Flags - Reserved
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Disable an ACPI event (fixed)
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_disable_event (
|
|
u32 event,
|
|
u32 flags)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
u32 value;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE ("acpi_disable_event");
|
|
|
|
|
|
/* Decode the Fixed Event */
|
|
|
|
if (event > ACPI_EVENT_MAX) {
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/*
|
|
* Disable the requested fixed event (by writing a zero to the
|
|
* enable register bit)
|
|
*/
|
|
status = acpi_set_register (acpi_gbl_fixed_event_info[event].enable_register_id,
|
|
0, ACPI_MTX_LOCK);
|
|
if (ACPI_FAILURE (status)) {
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
|
|
status = acpi_get_register (acpi_gbl_fixed_event_info[event].enable_register_id,
|
|
&value, ACPI_MTX_LOCK);
|
|
if (ACPI_FAILURE (status)) {
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
|
|
if (value != 0) {
|
|
ACPI_DEBUG_PRINT ((ACPI_DB_ERROR,
|
|
"Could not disable %s events\n", acpi_ut_get_event_name (event)));
|
|
return_ACPI_STATUS (AE_NO_HARDWARE_RESPONSE);
|
|
}
|
|
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
EXPORT_SYMBOL(acpi_disable_event);
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_clear_event
|
|
*
|
|
* PARAMETERS: Event - The fixed event to be cleared
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Clear an ACPI event (fixed)
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_clear_event (
|
|
u32 event)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE ("acpi_clear_event");
|
|
|
|
|
|
/* Decode the Fixed Event */
|
|
|
|
if (event > ACPI_EVENT_MAX) {
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/*
|
|
* Clear the requested fixed event (By writing a one to the
|
|
* status register bit)
|
|
*/
|
|
status = acpi_set_register (acpi_gbl_fixed_event_info[event].status_register_id,
|
|
1, ACPI_MTX_LOCK);
|
|
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
EXPORT_SYMBOL(acpi_clear_event);
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_clear_gpe
|
|
*
|
|
* PARAMETERS: gpe_device - Parent GPE Device
|
|
* gpe_number - GPE level within the GPE block
|
|
* Flags - Called from an ISR or not
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Clear an ACPI event (general purpose)
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_clear_gpe (
|
|
acpi_handle gpe_device,
|
|
u32 gpe_number,
|
|
u32 flags)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
struct acpi_gpe_event_info *gpe_event_info;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE ("acpi_clear_gpe");
|
|
|
|
|
|
/* Use semaphore lock if not executing at interrupt level */
|
|
|
|
if (flags & ACPI_NOT_ISR) {
|
|
status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS);
|
|
if (ACPI_FAILURE (status)) {
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
}
|
|
|
|
/* 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:
|
|
if (flags & ACPI_NOT_ISR) {
|
|
(void) acpi_ut_release_mutex (ACPI_MTX_EVENTS);
|
|
}
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
|
|
|
|
#ifdef ACPI_FUTURE_USAGE
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_get_event_status
|
|
*
|
|
* PARAMETERS: Event - The fixed event
|
|
* event_status - Where the current status of the event will
|
|
* be returned
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Obtains and returns the current status of the event
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_get_event_status (
|
|
u32 event,
|
|
acpi_event_status *event_status)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE ("acpi_get_event_status");
|
|
|
|
|
|
if (!event_status) {
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/* Decode the Fixed Event */
|
|
|
|
if (event > ACPI_EVENT_MAX) {
|
|
return_ACPI_STATUS (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/* Get the status of the requested fixed event */
|
|
|
|
status = acpi_get_register (acpi_gbl_fixed_event_info[event].status_register_id,
|
|
event_status, ACPI_MTX_LOCK);
|
|
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_get_gpe_status
|
|
*
|
|
* PARAMETERS: gpe_device - Parent GPE Device
|
|
* gpe_number - GPE level within the GPE block
|
|
* Flags - Called from an ISR or not
|
|
* event_status - Where the current status of the event will
|
|
* be returned
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Get status of an event (general purpose)
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_get_gpe_status (
|
|
acpi_handle gpe_device,
|
|
u32 gpe_number,
|
|
u32 flags,
|
|
acpi_event_status *event_status)
|
|
{
|
|
acpi_status status = AE_OK;
|
|
struct acpi_gpe_event_info *gpe_event_info;
|
|
|
|
|
|
ACPI_FUNCTION_TRACE ("acpi_get_gpe_status");
|
|
|
|
|
|
/* Use semaphore lock if not executing at interrupt level */
|
|
|
|
if (flags & ACPI_NOT_ISR) {
|
|
status = acpi_ut_acquire_mutex (ACPI_MTX_EVENTS);
|
|
if (ACPI_FAILURE (status)) {
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
}
|
|
|
|
/* 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:
|
|
if (flags & ACPI_NOT_ISR) {
|
|
(void) acpi_ut_release_mutex (ACPI_MTX_EVENTS);
|
|
}
|
|
return_ACPI_STATUS (status);
|
|
}
|
|
#endif /* ACPI_FUTURE_USAGE */
|
|
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* 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
|
|
*
|
|
******************************************************************************/
|
|
|
|
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 (status);
|
|
}
|
|
|
|
node = acpi_ns_map_handle_to_node (gpe_device);
|
|
if (!node) {
|
|
status = AE_BAD_PARAMETER;
|
|
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, register_count,
|
|
0, interrupt_number, &gpe_block);
|
|
if (ACPI_FAILURE (status)) {
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
/* Get the device_object attached to the node */
|
|
|
|
obj_desc = acpi_ns_get_attached_object (node);
|
|
if (!obj_desc) {
|
|
/* No object, create a new one */
|
|
|
|
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;
|
|
}
|
|
}
|
|
|
|
/* 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);
|
|
}
|
|
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 (status);
|
|
}
|
|
|
|
node = acpi_ns_map_handle_to_node (gpe_device);
|
|
if (!node) {
|
|
status = AE_BAD_PARAMETER;
|
|
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);
|
|
}
|
|
|
|
EXPORT_SYMBOL(acpi_remove_gpe_block);
|