mirror of https://gitee.com/openkylin/linux.git
1214 lines
34 KiB
C
1214 lines
34 KiB
C
/******************************************************************************
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*
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* Module Name: evgpeblk - GPE block creation and initialization.
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2010, 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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#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("evgpeblk")
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/* Local prototypes */
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static acpi_status
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acpi_ev_match_gpe_method(acpi_handle obj_handle,
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u32 level, void *obj_desc, void **return_value);
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static acpi_status
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acpi_ev_match_prw_and_gpe(acpi_handle obj_handle,
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u32 level, void *info, void **return_value);
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static struct acpi_gpe_xrupt_info *acpi_ev_get_gpe_xrupt_block(u32
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interrupt_number);
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static acpi_status
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acpi_ev_delete_gpe_xrupt(struct acpi_gpe_xrupt_info *gpe_xrupt);
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static acpi_status
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acpi_ev_install_gpe_block(struct acpi_gpe_block_info *gpe_block,
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u32 interrupt_number);
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static acpi_status
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acpi_ev_create_gpe_info_blocks(struct acpi_gpe_block_info *gpe_block);
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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_valid_gpe_event
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*
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* PARAMETERS: gpe_event_info - Info for this GPE
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*
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* RETURN: TRUE if the gpe_event is valid
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*
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* DESCRIPTION: Validate a GPE event. DO NOT CALL FROM INTERRUPT LEVEL.
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* Should be called only when the GPE lists are semaphore locked
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* and not subject to change.
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*
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******************************************************************************/
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u8 acpi_ev_valid_gpe_event(struct acpi_gpe_event_info *gpe_event_info)
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{
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struct acpi_gpe_xrupt_info *gpe_xrupt_block;
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struct acpi_gpe_block_info *gpe_block;
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ACPI_FUNCTION_ENTRY();
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/* No need for spin lock since we are not changing any list elements */
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/* Walk the GPE interrupt levels */
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gpe_xrupt_block = acpi_gbl_gpe_xrupt_list_head;
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while (gpe_xrupt_block) {
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gpe_block = gpe_xrupt_block->gpe_block_list_head;
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/* Walk the GPE blocks on this interrupt level */
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while (gpe_block) {
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if ((&gpe_block->event_info[0] <= gpe_event_info) &&
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(&gpe_block->event_info[gpe_block->gpe_count] >
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gpe_event_info)) {
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return (TRUE);
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}
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gpe_block = gpe_block->next;
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}
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gpe_xrupt_block = gpe_xrupt_block->next;
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}
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return (FALSE);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_walk_gpe_list
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*
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* PARAMETERS: gpe_walk_callback - Routine called for each GPE block
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* Context - Value passed to callback
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*
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* RETURN: Status
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*
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* DESCRIPTION: Walk the GPE lists.
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*
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******************************************************************************/
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acpi_status
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acpi_ev_walk_gpe_list(acpi_gpe_callback gpe_walk_callback, void *context)
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{
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struct acpi_gpe_block_info *gpe_block;
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struct acpi_gpe_xrupt_info *gpe_xrupt_info;
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acpi_status status = AE_OK;
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acpi_cpu_flags flags;
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ACPI_FUNCTION_TRACE(ev_walk_gpe_list);
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flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
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/* Walk the interrupt level descriptor list */
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gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head;
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while (gpe_xrupt_info) {
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/* Walk all Gpe Blocks attached to this interrupt level */
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gpe_block = gpe_xrupt_info->gpe_block_list_head;
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while (gpe_block) {
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/* One callback per GPE block */
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status =
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gpe_walk_callback(gpe_xrupt_info, gpe_block,
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context);
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if (ACPI_FAILURE(status)) {
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if (status == AE_CTRL_END) { /* Callback abort */
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status = AE_OK;
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}
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goto unlock_and_exit;
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}
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gpe_block = gpe_block->next;
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}
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gpe_xrupt_info = gpe_xrupt_info->next;
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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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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_delete_gpe_handlers
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*
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* PARAMETERS: gpe_xrupt_info - GPE Interrupt info
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* gpe_block - Gpe Block info
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*
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* RETURN: Status
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*
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* DESCRIPTION: Delete all Handler objects found in the GPE data structs.
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* Used only prior to termination.
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*
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******************************************************************************/
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acpi_status
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acpi_ev_delete_gpe_handlers(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
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struct acpi_gpe_block_info *gpe_block,
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void *context)
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{
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struct acpi_gpe_event_info *gpe_event_info;
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u32 i;
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u32 j;
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ACPI_FUNCTION_TRACE(ev_delete_gpe_handlers);
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/* Examine each GPE Register within the block */
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for (i = 0; i < gpe_block->register_count; i++) {
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/* Now look at the individual GPEs in this byte register */
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for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) {
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gpe_event_info = &gpe_block->event_info[((acpi_size) i *
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ACPI_GPE_REGISTER_WIDTH)
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+ j];
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if ((gpe_event_info->flags & ACPI_GPE_DISPATCH_MASK) ==
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ACPI_GPE_DISPATCH_HANDLER) {
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ACPI_FREE(gpe_event_info->dispatch.handler);
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gpe_event_info->dispatch.handler = NULL;
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gpe_event_info->flags &=
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~ACPI_GPE_DISPATCH_MASK;
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}
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}
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}
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return_ACPI_STATUS(AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_match_gpe_method
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*
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* PARAMETERS: Callback from walk_namespace
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*
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* RETURN: Status
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*
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* DESCRIPTION: Called from acpi_walk_namespace. Expects each object to be a
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* control method under the _GPE portion of the namespace.
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* Extract the name and GPE type from the object, saving this
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* information for quick lookup during GPE dispatch
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*
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* The name of each GPE control method is of the form:
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* "_Lxx" or "_Exx", where:
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* L - means that the GPE is level triggered
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* E - means that the GPE is edge triggered
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* xx - is the GPE number [in HEX]
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*
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******************************************************************************/
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static acpi_status
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acpi_ev_match_gpe_method(acpi_handle obj_handle,
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u32 level, void *obj_desc, void **return_value)
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{
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struct acpi_namespace_node *method_node =
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ACPI_CAST_PTR(struct acpi_namespace_node, obj_handle);
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struct acpi_gpe_block_info *gpe_block = (void *)obj_desc;
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struct acpi_gpe_event_info *gpe_event_info;
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u32 gpe_number;
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char name[ACPI_NAME_SIZE + 1];
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u8 type;
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ACPI_FUNCTION_TRACE(ev_save_method_info);
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/*
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* Match and decode the _Lxx and _Exx GPE method names
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*
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* 1) Extract the method name and null terminate it
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*/
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ACPI_MOVE_32_TO_32(name, &method_node->name.integer);
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name[ACPI_NAME_SIZE] = 0;
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/* 2) Name must begin with an underscore */
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if (name[0] != '_') {
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return_ACPI_STATUS(AE_OK); /* Ignore this method */
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}
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/*
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* 3) Edge/Level determination is based on the 2nd character
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* of the method name
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*
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* NOTE: Default GPE type is RUNTIME only. Later, if a _PRW object is
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* found that points to this GPE, the ACPI_GPE_CAN_WAKE flag is set.
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*/
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switch (name[1]) {
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case 'L':
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type = ACPI_GPE_LEVEL_TRIGGERED;
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break;
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case 'E':
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type = ACPI_GPE_EDGE_TRIGGERED;
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break;
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default:
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/* Unknown method type, just ignore it */
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ACPI_DEBUG_PRINT((ACPI_DB_LOAD,
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"Ignoring unknown GPE method type: %s "
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"(name not of form _Lxx or _Exx)", name));
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return_ACPI_STATUS(AE_OK);
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}
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/* 4) The last two characters of the name are the hex GPE Number */
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gpe_number = ACPI_STRTOUL(&name[2], NULL, 16);
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if (gpe_number == ACPI_UINT32_MAX) {
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/* Conversion failed; invalid method, just ignore it */
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ACPI_DEBUG_PRINT((ACPI_DB_LOAD,
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"Could not extract GPE number from name: %s "
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"(name is not of form _Lxx or _Exx)", name));
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return_ACPI_STATUS(AE_OK);
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}
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/* Ensure that we have a valid GPE number for this GPE block */
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gpe_event_info = acpi_ev_low_get_gpe_info(gpe_number, gpe_block);
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if (!gpe_event_info) {
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/*
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* This gpe_number is not valid for this GPE block, just ignore it.
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* However, it may be valid for a different GPE block, since GPE0
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* and GPE1 methods both appear under \_GPE.
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*/
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return_ACPI_STATUS(AE_OK);
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}
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/*
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* Add the GPE information from above to the gpe_event_info block for
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* use during dispatch of this GPE.
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*/
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gpe_event_info->flags = (u8)(type | ACPI_GPE_DISPATCH_METHOD);
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gpe_event_info->dispatch.method_node = method_node;
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ACPI_DEBUG_PRINT((ACPI_DB_LOAD,
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"Registered GPE method %s as GPE number 0x%.2X\n",
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name, gpe_number));
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return_ACPI_STATUS(AE_OK);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_match_prw_and_gpe
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*
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* PARAMETERS: Callback from walk_namespace
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*
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* RETURN: Status. NOTE: We ignore errors so that the _PRW walk is
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* not aborted on a single _PRW failure.
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*
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* DESCRIPTION: Called from acpi_walk_namespace. Expects each object to be a
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* Device. Run the _PRW method. If present, extract the GPE
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* number and mark the GPE as a CAN_WAKE GPE.
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*
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******************************************************************************/
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static acpi_status
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acpi_ev_match_prw_and_gpe(acpi_handle obj_handle,
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u32 level, void *info, void **return_value)
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{
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struct acpi_gpe_walk_info *gpe_info = (void *)info;
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struct acpi_namespace_node *gpe_device;
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struct acpi_gpe_block_info *gpe_block;
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struct acpi_namespace_node *target_gpe_device;
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struct acpi_gpe_event_info *gpe_event_info;
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union acpi_operand_object *pkg_desc;
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union acpi_operand_object *obj_desc;
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u32 gpe_number;
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acpi_status status;
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ACPI_FUNCTION_TRACE(ev_match_prw_and_gpe);
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/* Check for a _PRW method under this device */
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status = acpi_ut_evaluate_object(obj_handle, METHOD_NAME__PRW,
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ACPI_BTYPE_PACKAGE, &pkg_desc);
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if (ACPI_FAILURE(status)) {
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/* Ignore all errors from _PRW, we don't want to abort the walk */
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return_ACPI_STATUS(AE_OK);
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}
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/* The returned _PRW package must have at least two elements */
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if (pkg_desc->package.count < 2) {
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goto cleanup;
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}
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/* Extract pointers from the input context */
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gpe_device = gpe_info->gpe_device;
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gpe_block = gpe_info->gpe_block;
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/*
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* The _PRW object must return a package, we are only interested in the
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* first element
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*/
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obj_desc = pkg_desc->package.elements[0];
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if (obj_desc->common.type == ACPI_TYPE_INTEGER) {
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/* Use FADT-defined GPE device (from definition of _PRW) */
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target_gpe_device = acpi_gbl_fadt_gpe_device;
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/* Integer is the GPE number in the FADT described GPE blocks */
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gpe_number = (u32) obj_desc->integer.value;
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} else if (obj_desc->common.type == ACPI_TYPE_PACKAGE) {
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/* Package contains a GPE reference and GPE number within a GPE block */
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if ((obj_desc->package.count < 2) ||
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((obj_desc->package.elements[0])->common.type !=
|
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ACPI_TYPE_LOCAL_REFERENCE) ||
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((obj_desc->package.elements[1])->common.type !=
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ACPI_TYPE_INTEGER)) {
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goto cleanup;
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}
|
|
|
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/* Get GPE block reference and decode */
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|
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target_gpe_device =
|
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obj_desc->package.elements[0]->reference.node;
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gpe_number = (u32) obj_desc->package.elements[1]->integer.value;
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} else {
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/* Unknown type, just ignore it */
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goto cleanup;
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}
|
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|
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/*
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* Is this GPE within this block?
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*
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* TRUE if and only if these conditions are true:
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* 1) The GPE devices match.
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* 2) The GPE index(number) is within the range of the Gpe Block
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* associated with the GPE device.
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*/
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if (gpe_device != target_gpe_device) {
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goto cleanup;
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}
|
|
|
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gpe_event_info = acpi_ev_low_get_gpe_info(gpe_number, gpe_block);
|
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if (gpe_event_info) {
|
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/* This GPE can wake the system */
|
|
|
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gpe_event_info->flags |= ACPI_GPE_CAN_WAKE;
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}
|
|
|
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cleanup:
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acpi_ut_remove_reference(pkg_desc);
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return_ACPI_STATUS(AE_OK);
|
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}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ev_get_gpe_xrupt_block
|
|
*
|
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* PARAMETERS: interrupt_number - Interrupt for a GPE block
|
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*
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* RETURN: A GPE interrupt block
|
|
*
|
|
* DESCRIPTION: Get or Create a GPE interrupt block. There is one interrupt
|
|
* block per unique interrupt level used for GPEs. Should be
|
|
* called only when the GPE lists are semaphore locked and not
|
|
* subject to change.
|
|
*
|
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******************************************************************************/
|
|
|
|
static struct acpi_gpe_xrupt_info *acpi_ev_get_gpe_xrupt_block(u32
|
|
interrupt_number)
|
|
{
|
|
struct acpi_gpe_xrupt_info *next_gpe_xrupt;
|
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struct acpi_gpe_xrupt_info *gpe_xrupt;
|
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acpi_status status;
|
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acpi_cpu_flags flags;
|
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|
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ACPI_FUNCTION_TRACE(ev_get_gpe_xrupt_block);
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|
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/* No need for lock since we are not changing any list elements here */
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|
|
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next_gpe_xrupt = acpi_gbl_gpe_xrupt_list_head;
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while (next_gpe_xrupt) {
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if (next_gpe_xrupt->interrupt_number == interrupt_number) {
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return_PTR(next_gpe_xrupt);
|
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}
|
|
|
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next_gpe_xrupt = next_gpe_xrupt->next;
|
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}
|
|
|
|
/* Not found, must allocate a new xrupt descriptor */
|
|
|
|
gpe_xrupt = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_xrupt_info));
|
|
if (!gpe_xrupt) {
|
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return_PTR(NULL);
|
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}
|
|
|
|
gpe_xrupt->interrupt_number = interrupt_number;
|
|
|
|
/* Install new interrupt descriptor with spin lock */
|
|
|
|
flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
|
|
if (acpi_gbl_gpe_xrupt_list_head) {
|
|
next_gpe_xrupt = acpi_gbl_gpe_xrupt_list_head;
|
|
while (next_gpe_xrupt->next) {
|
|
next_gpe_xrupt = next_gpe_xrupt->next;
|
|
}
|
|
|
|
next_gpe_xrupt->next = gpe_xrupt;
|
|
gpe_xrupt->previous = next_gpe_xrupt;
|
|
} else {
|
|
acpi_gbl_gpe_xrupt_list_head = gpe_xrupt;
|
|
}
|
|
acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
|
|
|
|
/* Install new interrupt handler if not SCI_INT */
|
|
|
|
if (interrupt_number != acpi_gbl_FADT.sci_interrupt) {
|
|
status = acpi_os_install_interrupt_handler(interrupt_number,
|
|
acpi_ev_gpe_xrupt_handler,
|
|
gpe_xrupt);
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_ERROR((AE_INFO,
|
|
"Could not install GPE interrupt handler at level 0x%X",
|
|
interrupt_number));
|
|
return_PTR(NULL);
|
|
}
|
|
}
|
|
|
|
return_PTR(gpe_xrupt);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ev_delete_gpe_xrupt
|
|
*
|
|
* PARAMETERS: gpe_xrupt - A GPE interrupt info block
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Remove and free a gpe_xrupt block. Remove an associated
|
|
* interrupt handler if not the SCI interrupt.
|
|
*
|
|
******************************************************************************/
|
|
|
|
static acpi_status
|
|
acpi_ev_delete_gpe_xrupt(struct acpi_gpe_xrupt_info *gpe_xrupt)
|
|
{
|
|
acpi_status status;
|
|
acpi_cpu_flags flags;
|
|
|
|
ACPI_FUNCTION_TRACE(ev_delete_gpe_xrupt);
|
|
|
|
/* We never want to remove the SCI interrupt handler */
|
|
|
|
if (gpe_xrupt->interrupt_number == acpi_gbl_FADT.sci_interrupt) {
|
|
gpe_xrupt->gpe_block_list_head = NULL;
|
|
return_ACPI_STATUS(AE_OK);
|
|
}
|
|
|
|
/* Disable this interrupt */
|
|
|
|
status =
|
|
acpi_os_remove_interrupt_handler(gpe_xrupt->interrupt_number,
|
|
acpi_ev_gpe_xrupt_handler);
|
|
if (ACPI_FAILURE(status)) {
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/* Unlink the interrupt block with lock */
|
|
|
|
flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
|
|
if (gpe_xrupt->previous) {
|
|
gpe_xrupt->previous->next = gpe_xrupt->next;
|
|
} else {
|
|
/* No previous, update list head */
|
|
|
|
acpi_gbl_gpe_xrupt_list_head = gpe_xrupt->next;
|
|
}
|
|
|
|
if (gpe_xrupt->next) {
|
|
gpe_xrupt->next->previous = gpe_xrupt->previous;
|
|
}
|
|
acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
|
|
|
|
/* Free the block */
|
|
|
|
ACPI_FREE(gpe_xrupt);
|
|
return_ACPI_STATUS(AE_OK);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ev_install_gpe_block
|
|
*
|
|
* PARAMETERS: gpe_block - New GPE block
|
|
* interrupt_number - Xrupt to be associated with this
|
|
* GPE block
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Install new GPE block with mutex support
|
|
*
|
|
******************************************************************************/
|
|
|
|
static acpi_status
|
|
acpi_ev_install_gpe_block(struct acpi_gpe_block_info *gpe_block,
|
|
u32 interrupt_number)
|
|
{
|
|
struct acpi_gpe_block_info *next_gpe_block;
|
|
struct acpi_gpe_xrupt_info *gpe_xrupt_block;
|
|
acpi_status status;
|
|
acpi_cpu_flags flags;
|
|
|
|
ACPI_FUNCTION_TRACE(ev_install_gpe_block);
|
|
|
|
status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
|
|
if (ACPI_FAILURE(status)) {
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
gpe_xrupt_block = acpi_ev_get_gpe_xrupt_block(interrupt_number);
|
|
if (!gpe_xrupt_block) {
|
|
status = AE_NO_MEMORY;
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
/* Install the new block at the end of the list with lock */
|
|
|
|
flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
|
|
if (gpe_xrupt_block->gpe_block_list_head) {
|
|
next_gpe_block = gpe_xrupt_block->gpe_block_list_head;
|
|
while (next_gpe_block->next) {
|
|
next_gpe_block = next_gpe_block->next;
|
|
}
|
|
|
|
next_gpe_block->next = gpe_block;
|
|
gpe_block->previous = next_gpe_block;
|
|
} else {
|
|
gpe_xrupt_block->gpe_block_list_head = gpe_block;
|
|
}
|
|
|
|
gpe_block->xrupt_block = gpe_xrupt_block;
|
|
acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
|
|
|
|
unlock_and_exit:
|
|
status = acpi_ut_release_mutex(ACPI_MTX_EVENTS);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ev_delete_gpe_block
|
|
*
|
|
* PARAMETERS: gpe_block - Existing GPE block
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Remove a GPE block
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status acpi_ev_delete_gpe_block(struct acpi_gpe_block_info *gpe_block)
|
|
{
|
|
acpi_status status;
|
|
acpi_cpu_flags flags;
|
|
|
|
ACPI_FUNCTION_TRACE(ev_install_gpe_block);
|
|
|
|
status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
|
|
if (ACPI_FAILURE(status)) {
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/* Disable all GPEs in this block */
|
|
|
|
status =
|
|
acpi_hw_disable_gpe_block(gpe_block->xrupt_block, gpe_block, NULL);
|
|
|
|
if (!gpe_block->previous && !gpe_block->next) {
|
|
|
|
/* This is the last gpe_block on this interrupt */
|
|
|
|
status = acpi_ev_delete_gpe_xrupt(gpe_block->xrupt_block);
|
|
if (ACPI_FAILURE(status)) {
|
|
goto unlock_and_exit;
|
|
}
|
|
} else {
|
|
/* Remove the block on this interrupt with lock */
|
|
|
|
flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
|
|
if (gpe_block->previous) {
|
|
gpe_block->previous->next = gpe_block->next;
|
|
} else {
|
|
gpe_block->xrupt_block->gpe_block_list_head =
|
|
gpe_block->next;
|
|
}
|
|
|
|
if (gpe_block->next) {
|
|
gpe_block->next->previous = gpe_block->previous;
|
|
}
|
|
acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
|
|
}
|
|
|
|
acpi_current_gpe_count -= gpe_block->gpe_count;
|
|
|
|
/* Free the gpe_block */
|
|
|
|
ACPI_FREE(gpe_block->register_info);
|
|
ACPI_FREE(gpe_block->event_info);
|
|
ACPI_FREE(gpe_block);
|
|
|
|
unlock_and_exit:
|
|
status = acpi_ut_release_mutex(ACPI_MTX_EVENTS);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ev_create_gpe_info_blocks
|
|
*
|
|
* PARAMETERS: gpe_block - New GPE block
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Create the register_info and event_info blocks for this GPE block
|
|
*
|
|
******************************************************************************/
|
|
|
|
static acpi_status
|
|
acpi_ev_create_gpe_info_blocks(struct acpi_gpe_block_info *gpe_block)
|
|
{
|
|
struct acpi_gpe_register_info *gpe_register_info = NULL;
|
|
struct acpi_gpe_event_info *gpe_event_info = NULL;
|
|
struct acpi_gpe_event_info *this_event;
|
|
struct acpi_gpe_register_info *this_register;
|
|
u32 i;
|
|
u32 j;
|
|
acpi_status status;
|
|
|
|
ACPI_FUNCTION_TRACE(ev_create_gpe_info_blocks);
|
|
|
|
/* Allocate the GPE register information block */
|
|
|
|
gpe_register_info = ACPI_ALLOCATE_ZEROED((acpi_size) gpe_block->
|
|
register_count *
|
|
sizeof(struct
|
|
acpi_gpe_register_info));
|
|
if (!gpe_register_info) {
|
|
ACPI_ERROR((AE_INFO,
|
|
"Could not allocate the GpeRegisterInfo table"));
|
|
return_ACPI_STATUS(AE_NO_MEMORY);
|
|
}
|
|
|
|
/*
|
|
* Allocate the GPE event_info block. There are eight distinct GPEs
|
|
* per register. Initialization to zeros is sufficient.
|
|
*/
|
|
gpe_event_info = ACPI_ALLOCATE_ZEROED((acpi_size) gpe_block->gpe_count *
|
|
sizeof(struct
|
|
acpi_gpe_event_info));
|
|
if (!gpe_event_info) {
|
|
ACPI_ERROR((AE_INFO,
|
|
"Could not allocate the GpeEventInfo table"));
|
|
status = AE_NO_MEMORY;
|
|
goto error_exit;
|
|
}
|
|
|
|
/* Save the new Info arrays in the GPE block */
|
|
|
|
gpe_block->register_info = gpe_register_info;
|
|
gpe_block->event_info = gpe_event_info;
|
|
|
|
/*
|
|
* Initialize the GPE Register and Event structures. A goal of these
|
|
* tables is to hide the fact that there are two separate GPE register
|
|
* sets in a given GPE hardware block, the status registers occupy the
|
|
* first half, and the enable registers occupy the second half.
|
|
*/
|
|
this_register = gpe_register_info;
|
|
this_event = gpe_event_info;
|
|
|
|
for (i = 0; i < gpe_block->register_count; i++) {
|
|
|
|
/* Init the register_info for this GPE register (8 GPEs) */
|
|
|
|
this_register->base_gpe_number =
|
|
(u8) (gpe_block->block_base_number +
|
|
(i * ACPI_GPE_REGISTER_WIDTH));
|
|
|
|
this_register->status_address.address =
|
|
gpe_block->block_address.address + i;
|
|
|
|
this_register->enable_address.address =
|
|
gpe_block->block_address.address + i +
|
|
gpe_block->register_count;
|
|
|
|
this_register->status_address.space_id =
|
|
gpe_block->block_address.space_id;
|
|
this_register->enable_address.space_id =
|
|
gpe_block->block_address.space_id;
|
|
this_register->status_address.bit_width =
|
|
ACPI_GPE_REGISTER_WIDTH;
|
|
this_register->enable_address.bit_width =
|
|
ACPI_GPE_REGISTER_WIDTH;
|
|
this_register->status_address.bit_offset = 0;
|
|
this_register->enable_address.bit_offset = 0;
|
|
|
|
/* Init the event_info for each GPE within this register */
|
|
|
|
for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) {
|
|
this_event->gpe_number =
|
|
(u8) (this_register->base_gpe_number + j);
|
|
this_event->register_info = this_register;
|
|
this_event++;
|
|
}
|
|
|
|
/* Disable all GPEs within this register */
|
|
|
|
status = acpi_hw_write(0x00, &this_register->enable_address);
|
|
if (ACPI_FAILURE(status)) {
|
|
goto error_exit;
|
|
}
|
|
|
|
/* Clear any pending GPE events within this register */
|
|
|
|
status = acpi_hw_write(0xFF, &this_register->status_address);
|
|
if (ACPI_FAILURE(status)) {
|
|
goto error_exit;
|
|
}
|
|
|
|
this_register++;
|
|
}
|
|
|
|
return_ACPI_STATUS(AE_OK);
|
|
|
|
error_exit:
|
|
if (gpe_register_info) {
|
|
ACPI_FREE(gpe_register_info);
|
|
}
|
|
if (gpe_event_info) {
|
|
ACPI_FREE(gpe_event_info);
|
|
}
|
|
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ev_create_gpe_block
|
|
*
|
|
* PARAMETERS: gpe_device - Handle to the parent GPE block
|
|
* gpe_block_address - Address and space_iD
|
|
* register_count - Number of GPE register pairs in the block
|
|
* gpe_block_base_number - Starting GPE number for the block
|
|
* interrupt_number - H/W interrupt for the block
|
|
* return_gpe_block - Where the new block descriptor is returned
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Create and Install a block of GPE registers. All GPEs within
|
|
* the block are disabled at exit.
|
|
* Note: Assumes namespace is locked.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_ev_create_gpe_block(struct acpi_namespace_node *gpe_device,
|
|
struct acpi_generic_address *gpe_block_address,
|
|
u32 register_count,
|
|
u8 gpe_block_base_number,
|
|
u32 interrupt_number,
|
|
struct acpi_gpe_block_info **return_gpe_block)
|
|
{
|
|
acpi_status status;
|
|
struct acpi_gpe_block_info *gpe_block;
|
|
|
|
ACPI_FUNCTION_TRACE(ev_create_gpe_block);
|
|
|
|
if (!register_count) {
|
|
return_ACPI_STATUS(AE_OK);
|
|
}
|
|
|
|
/* Allocate a new GPE block */
|
|
|
|
gpe_block = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_block_info));
|
|
if (!gpe_block) {
|
|
return_ACPI_STATUS(AE_NO_MEMORY);
|
|
}
|
|
|
|
/* Initialize the new GPE block */
|
|
|
|
gpe_block->node = gpe_device;
|
|
gpe_block->gpe_count = (u16)(register_count * ACPI_GPE_REGISTER_WIDTH);
|
|
gpe_block->register_count = register_count;
|
|
gpe_block->block_base_number = gpe_block_base_number;
|
|
|
|
ACPI_MEMCPY(&gpe_block->block_address, gpe_block_address,
|
|
sizeof(struct acpi_generic_address));
|
|
|
|
/*
|
|
* Create the register_info and event_info sub-structures
|
|
* Note: disables and clears all GPEs in the block
|
|
*/
|
|
status = acpi_ev_create_gpe_info_blocks(gpe_block);
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_FREE(gpe_block);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/* Install the new block in the global lists */
|
|
|
|
status = acpi_ev_install_gpe_block(gpe_block, interrupt_number);
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_FREE(gpe_block);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/* Find all GPE methods (_Lxx, _Exx) for this block */
|
|
|
|
status = acpi_ns_walk_namespace(ACPI_TYPE_METHOD, gpe_device,
|
|
ACPI_UINT32_MAX, ACPI_NS_WALK_NO_UNLOCK,
|
|
acpi_ev_match_gpe_method, NULL,
|
|
gpe_block, NULL);
|
|
|
|
/* Return the new block */
|
|
|
|
if (return_gpe_block) {
|
|
(*return_gpe_block) = gpe_block;
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INIT,
|
|
"GPE %02X to %02X [%4.4s] %u regs on int 0x%X\n",
|
|
(u32) gpe_block->block_base_number,
|
|
(u32) (gpe_block->block_base_number +
|
|
(gpe_block->gpe_count - 1)),
|
|
gpe_device->name.ascii, gpe_block->register_count,
|
|
interrupt_number));
|
|
|
|
/* Update global count of currently available GPEs */
|
|
|
|
acpi_current_gpe_count += gpe_block->gpe_count;
|
|
return_ACPI_STATUS(AE_OK);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ev_initialize_gpe_block
|
|
*
|
|
* PARAMETERS: gpe_device - Handle to the parent GPE block
|
|
* gpe_block - Gpe Block info
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Initialize and enable a GPE block. First find and run any
|
|
* _PRT methods associated with the block, then enable the
|
|
* appropriate GPEs.
|
|
* Note: Assumes namespace is locked.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_ev_initialize_gpe_block(struct acpi_namespace_node *gpe_device,
|
|
struct acpi_gpe_block_info *gpe_block)
|
|
{
|
|
acpi_status status;
|
|
struct acpi_gpe_event_info *gpe_event_info;
|
|
struct acpi_gpe_walk_info gpe_info;
|
|
u32 wake_gpe_count;
|
|
u32 gpe_enabled_count;
|
|
u32 gpe_index;
|
|
u32 gpe_number;
|
|
u32 i;
|
|
u32 j;
|
|
|
|
ACPI_FUNCTION_TRACE(ev_initialize_gpe_block);
|
|
|
|
/* Ignore a null GPE block (e.g., if no GPE block 1 exists) */
|
|
|
|
if (!gpe_block) {
|
|
return_ACPI_STATUS(AE_OK);
|
|
}
|
|
|
|
/*
|
|
* Runtime option: Should wake GPEs be enabled at runtime? The default
|
|
* is no, they should only be enabled just as the machine goes to sleep.
|
|
*/
|
|
if (acpi_gbl_leave_wake_gpes_disabled) {
|
|
/*
|
|
* Differentiate runtime vs wake GPEs, via the _PRW control methods.
|
|
* Each GPE that has one or more _PRWs that reference it is by
|
|
* definition a wake GPE and will not be enabled while the machine
|
|
* is running.
|
|
*/
|
|
gpe_info.gpe_block = gpe_block;
|
|
gpe_info.gpe_device = gpe_device;
|
|
|
|
status = acpi_ns_walk_namespace(ACPI_TYPE_DEVICE, ACPI_ROOT_OBJECT,
|
|
ACPI_UINT32_MAX, ACPI_NS_WALK_UNLOCK,
|
|
acpi_ev_match_prw_and_gpe, NULL,
|
|
&gpe_info, NULL);
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_EXCEPTION((AE_INFO, status,
|
|
"While executing _PRW methods"));
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Enable all GPEs that have a corresponding method and are not
|
|
* capable of generating wakeups. Any other GPEs within this block
|
|
* must be enabled via the acpi_enable_gpe interface.
|
|
*/
|
|
wake_gpe_count = 0;
|
|
gpe_enabled_count = 0;
|
|
|
|
if (gpe_device == acpi_gbl_fadt_gpe_device) {
|
|
gpe_device = NULL;
|
|
}
|
|
|
|
for (i = 0; i < gpe_block->register_count; i++) {
|
|
for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) {
|
|
|
|
/* Get the info block for this particular GPE */
|
|
|
|
gpe_index = (i * ACPI_GPE_REGISTER_WIDTH) + j;
|
|
gpe_event_info = &gpe_block->event_info[gpe_index];
|
|
|
|
if (gpe_event_info->flags & ACPI_GPE_CAN_WAKE) {
|
|
wake_gpe_count++;
|
|
if (acpi_gbl_leave_wake_gpes_disabled) {
|
|
continue;
|
|
}
|
|
}
|
|
|
|
/* Ignore GPEs that have no corresponding _Lxx/_Exx method */
|
|
|
|
if (!(gpe_event_info->flags & ACPI_GPE_DISPATCH_METHOD)) {
|
|
continue;
|
|
}
|
|
|
|
/* Enable this GPE */
|
|
|
|
gpe_number = gpe_index + gpe_block->block_base_number;
|
|
status = acpi_enable_gpe(gpe_device, gpe_number,
|
|
ACPI_GPE_TYPE_RUNTIME);
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_EXCEPTION((AE_INFO, status,
|
|
"Could not enable GPE 0x%02X",
|
|
gpe_number));
|
|
continue;
|
|
}
|
|
|
|
gpe_enabled_count++;
|
|
}
|
|
}
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INIT,
|
|
"Found %u Wake, Enabled %u Runtime GPEs in this block\n",
|
|
wake_gpe_count, gpe_enabled_count));
|
|
|
|
return_ACPI_STATUS(AE_OK);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ev_gpe_initialize
|
|
*
|
|
* PARAMETERS: None
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Initialize the GPE data structures
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status acpi_ev_gpe_initialize(void)
|
|
{
|
|
u32 register_count0 = 0;
|
|
u32 register_count1 = 0;
|
|
u32 gpe_number_max = 0;
|
|
acpi_status status;
|
|
|
|
ACPI_FUNCTION_TRACE(ev_gpe_initialize);
|
|
|
|
status = acpi_ut_acquire_mutex(ACPI_MTX_NAMESPACE);
|
|
if (ACPI_FAILURE(status)) {
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/*
|
|
* Initialize the GPE Block(s) defined in the FADT
|
|
*
|
|
* Why the GPE register block lengths are divided by 2: From the ACPI
|
|
* Spec, section "General-Purpose Event Registers", we have:
|
|
*
|
|
* "Each register block contains two registers of equal length
|
|
* GPEx_STS and GPEx_EN (where x is 0 or 1). The length of the
|
|
* GPE0_STS and GPE0_EN registers is equal to half the GPE0_LEN
|
|
* The length of the GPE1_STS and GPE1_EN registers is equal to
|
|
* half the GPE1_LEN. If a generic register block is not supported
|
|
* then its respective block pointer and block length values in the
|
|
* FADT table contain zeros. The GPE0_LEN and GPE1_LEN do not need
|
|
* to be the same size."
|
|
*/
|
|
|
|
/*
|
|
* Determine the maximum GPE number for this machine.
|
|
*
|
|
* Note: both GPE0 and GPE1 are optional, and either can exist without
|
|
* the other.
|
|
*
|
|
* If EITHER the register length OR the block address are zero, then that
|
|
* particular block is not supported.
|
|
*/
|
|
if (acpi_gbl_FADT.gpe0_block_length &&
|
|
acpi_gbl_FADT.xgpe0_block.address) {
|
|
|
|
/* GPE block 0 exists (has both length and address > 0) */
|
|
|
|
register_count0 = (u16) (acpi_gbl_FADT.gpe0_block_length / 2);
|
|
|
|
gpe_number_max =
|
|
(register_count0 * ACPI_GPE_REGISTER_WIDTH) - 1;
|
|
|
|
/* Install GPE Block 0 */
|
|
|
|
status = acpi_ev_create_gpe_block(acpi_gbl_fadt_gpe_device,
|
|
&acpi_gbl_FADT.xgpe0_block,
|
|
register_count0, 0,
|
|
acpi_gbl_FADT.sci_interrupt,
|
|
&acpi_gbl_gpe_fadt_blocks[0]);
|
|
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_EXCEPTION((AE_INFO, status,
|
|
"Could not create GPE Block 0"));
|
|
}
|
|
}
|
|
|
|
if (acpi_gbl_FADT.gpe1_block_length &&
|
|
acpi_gbl_FADT.xgpe1_block.address) {
|
|
|
|
/* GPE block 1 exists (has both length and address > 0) */
|
|
|
|
register_count1 = (u16) (acpi_gbl_FADT.gpe1_block_length / 2);
|
|
|
|
/* Check for GPE0/GPE1 overlap (if both banks exist) */
|
|
|
|
if ((register_count0) &&
|
|
(gpe_number_max >= acpi_gbl_FADT.gpe1_base)) {
|
|
ACPI_ERROR((AE_INFO,
|
|
"GPE0 block (GPE 0 to %u) overlaps the GPE1 block "
|
|
"(GPE %u to %u) - Ignoring GPE1",
|
|
gpe_number_max, acpi_gbl_FADT.gpe1_base,
|
|
acpi_gbl_FADT.gpe1_base +
|
|
((register_count1 *
|
|
ACPI_GPE_REGISTER_WIDTH) - 1)));
|
|
|
|
/* Ignore GPE1 block by setting the register count to zero */
|
|
|
|
register_count1 = 0;
|
|
} else {
|
|
/* Install GPE Block 1 */
|
|
|
|
status =
|
|
acpi_ev_create_gpe_block(acpi_gbl_fadt_gpe_device,
|
|
&acpi_gbl_FADT.xgpe1_block,
|
|
register_count1,
|
|
acpi_gbl_FADT.gpe1_base,
|
|
acpi_gbl_FADT.
|
|
sci_interrupt,
|
|
&acpi_gbl_gpe_fadt_blocks
|
|
[1]);
|
|
|
|
if (ACPI_FAILURE(status)) {
|
|
ACPI_EXCEPTION((AE_INFO, status,
|
|
"Could not create GPE Block 1"));
|
|
}
|
|
|
|
/*
|
|
* GPE0 and GPE1 do not have to be contiguous in the GPE number
|
|
* space. However, GPE0 always starts at GPE number zero.
|
|
*/
|
|
gpe_number_max = acpi_gbl_FADT.gpe1_base +
|
|
((register_count1 * ACPI_GPE_REGISTER_WIDTH) - 1);
|
|
}
|
|
}
|
|
|
|
/* Exit if there are no GPE registers */
|
|
|
|
if ((register_count0 + register_count1) == 0) {
|
|
|
|
/* GPEs are not required by ACPI, this is OK */
|
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INIT,
|
|
"There are no GPE blocks defined in the FADT\n"));
|
|
status = AE_OK;
|
|
goto cleanup;
|
|
}
|
|
|
|
/* Check for Max GPE number out-of-range */
|
|
|
|
if (gpe_number_max > ACPI_GPE_MAX) {
|
|
ACPI_ERROR((AE_INFO,
|
|
"Maximum GPE number from FADT is too large: 0x%X",
|
|
gpe_number_max));
|
|
status = AE_BAD_VALUE;
|
|
goto cleanup;
|
|
}
|
|
|
|
cleanup:
|
|
(void)acpi_ut_release_mutex(ACPI_MTX_NAMESPACE);
|
|
return_ACPI_STATUS(AE_OK);
|
|
}
|