b229cf92ee
Removed a device initialization optimization introduced in 20051216 where the _STA method was not run unless an _INI was also present for the same device. This optimization could cause problems because it could allow _INI methods to be run within a not-present device subtree (If a not-present device had no _INI, _STA would not be run, the not-present status would not be discovered, and the children of the device would be incorrectly traversed.) Implemented a new _STA optimization where namespace subtrees that do not contain _INI are identified and ignored during device initialization. Selectively running _STA can significantly improve boot time on large machines (with assistance from Len Brown.) Implemented support for the device initialization case where the returned _STA flags indicate a device not-present but functioning. In this case, _INI is not run, but the device children are examined for presence, as per the ACPI specification. Implemented an additional change to the IndexField support in order to conform to MS behavior. The value written to the Index Register is not simply a byte offset, it is a byte offset in units of the access width of the parent Index Field. (Fiodor Suietov) Defined and deployed a new OSL interface, acpi_os_validate_address(). This interface is called during the creation of all AML operation regions, and allows the host OS to exert control over what addresses it will allow the AML code to access. Operation Regions whose addresses are disallowed will cause a runtime exception when they are actually accessed (will not affect or abort table loading.) Defined and deployed a new OSL interface, acpi_os_validate_interface(). This interface allows the host OS to match the various "optional" interface/behavior strings for the _OSI predefined control method as appropriate (with assistance from Bjorn Helgaas.) Restructured and corrected various problems in the exception handling code paths within DsCallControlMethod and DsTerminateControlMethod in dsmethod (with assistance from Takayoshi Kochi.) Modified the Linux source converter to ignore quoted string literals while converting identifiers from mixed to lower case. This will correct problems with the disassembler and other areas where such strings must not be modified. The ACPI_FUNCTION_* macros no longer require quotes around the function name. This allows the Linux source converter to convert the names, now that the converter ignores quoted strings. Signed-off-by: Bob Moore <robert.moore@intel.com> Signed-off-by: Len Brown <len.brown@intel.com>
723 lines
19 KiB
C
723 lines
19 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 - 2006, 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 <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 acpi_enable(void)
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{
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acpi_status status = AE_OK;
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ACPI_FUNCTION_TRACE(acpi_enable);
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/* Make sure we have the FADT */
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if (!acpi_gbl_FADT) {
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ACPI_WARNING((AE_INFO, "No FADT information present!"));
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return_ACPI_STATUS(AE_NO_ACPI_TABLES);
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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,
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"System is already in ACPI mode\n"));
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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_ERROR((AE_INFO,
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"Could not transition to ACPI mode"));
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return_ACPI_STATUS(status);
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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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return_ACPI_STATUS(status);
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}
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ACPI_EXPORT_SYMBOL(acpi_enable)
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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 acpi_disable(void)
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{
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acpi_status status = AE_OK;
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ACPI_FUNCTION_TRACE(acpi_disable);
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if (!acpi_gbl_FADT) {
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ACPI_WARNING((AE_INFO, "No FADT information present!"));
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return_ACPI_STATUS(AE_NO_ACPI_TABLES);
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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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} 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_ERROR((AE_INFO,
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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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ACPI_EXPORT_SYMBOL(acpi_disable)
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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 acpi_enable_event(u32 event, 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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/* 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 =
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acpi_set_register(acpi_gbl_fixed_event_info[event].
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enable_register_id, 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 =
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acpi_get_register(acpi_gbl_fixed_event_info[event].
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enable_register_id, &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_ERROR((AE_INFO,
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"Could not enable %s event",
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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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ACPI_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 acpi_set_gpe_type(acpi_handle gpe_device, u32 gpe_number, 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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ACPI_FUNCTION_TRACE(acpi_set_gpe_type);
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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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ACPI_EXPORT_SYMBOL(acpi_set_gpe_type)
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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 acpi_enable_gpe(acpi_handle gpe_device, u32 gpe_number, 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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ACPI_FUNCTION_TRACE(acpi_enable_gpe);
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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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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
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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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******************************************************************************/
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acpi_status acpi_disable_gpe(acpi_handle gpe_device, u32 gpe_number, 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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ACPI_FUNCTION_TRACE(acpi_disable_gpe);
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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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|
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status = acpi_ev_disable_gpe(gpe_event_info);
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|
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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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|
|
|
ACPI_EXPORT_SYMBOL(acpi_disable_gpe)
|
|
|
|
/*******************************************************************************
|
|
*
|
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* FUNCTION: acpi_disable_event
|
|
*
|
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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: Disable an ACPI event (fixed)
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*
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******************************************************************************/
|
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acpi_status acpi_disable_event(u32 event, 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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|
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ACPI_FUNCTION_TRACE(acpi_disable_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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/*
|
|
* Disable the requested fixed event (by writing a zero to the
|
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* enable register bit)
|
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*/
|
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status =
|
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acpi_set_register(acpi_gbl_fixed_event_info[event].
|
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enable_register_id, 0, ACPI_MTX_LOCK);
|
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if (ACPI_FAILURE(status)) {
|
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return_ACPI_STATUS(status);
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|
}
|
|
|
|
status =
|
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acpi_get_register(acpi_gbl_fixed_event_info[event].
|
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enable_register_id, &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 != 0) {
|
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ACPI_ERROR((AE_INFO,
|
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"Could not disable %s events",
|
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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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ACPI_EXPORT_SYMBOL(acpi_disable_event)
|
|
|
|
/*******************************************************************************
|
|
*
|
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* FUNCTION: acpi_clear_event
|
|
*
|
|
* PARAMETERS: Event - The fixed event to be cleared
|
|
*
|
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* RETURN: Status
|
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*
|
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* DESCRIPTION: Clear an ACPI event (fixed)
|
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*
|
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******************************************************************************/
|
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acpi_status acpi_clear_event(u32 event)
|
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{
|
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acpi_status status = AE_OK;
|
|
|
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ACPI_FUNCTION_TRACE(acpi_clear_event);
|
|
|
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/* Decode the Fixed Event */
|
|
|
|
if (event > ACPI_EVENT_MAX) {
|
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return_ACPI_STATUS(AE_BAD_PARAMETER);
|
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}
|
|
|
|
/*
|
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* Clear the requested fixed event (By writing a one to the
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* status register bit)
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*/
|
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status =
|
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acpi_set_register(acpi_gbl_fixed_event_info[event].
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status_register_id, 1, ACPI_MTX_LOCK);
|
|
|
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return_ACPI_STATUS(status);
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}
|
|
|
|
ACPI_EXPORT_SYMBOL(acpi_clear_event)
|
|
|
|
/*******************************************************************************
|
|
*
|
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* FUNCTION: acpi_clear_gpe
|
|
*
|
|
* PARAMETERS: gpe_device - Parent GPE Device
|
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* 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);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL(acpi_clear_gpe)
|
|
|
|
#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);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL(acpi_get_event_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);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL(acpi_get_gpe_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;
|
|
}
|
|
|
|
/* Run the _PRW methods and enable the GPEs */
|
|
|
|
status = acpi_ev_initialize_gpe_block(node, 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);
|
|
}
|
|
|
|
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 (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);
|
|
}
|
|
|
|
ACPI_EXPORT_SYMBOL(acpi_remove_gpe_block)
|