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849 lines
24 KiB
849 lines
24 KiB
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 |
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/****************************************************************************** |
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* |
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* Module Name: evgpe - General Purpose Event handling and dispatch |
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* |
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* Copyright (C) 2000 - 2021, Intel Corp. |
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* |
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*****************************************************************************/ |
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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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|
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#define _COMPONENT ACPI_EVENTS |
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ACPI_MODULE_NAME("evgpe") |
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#if (!ACPI_REDUCED_HARDWARE) /* Entire module */ |
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/* Local prototypes */ |
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static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context); |
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|
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static void ACPI_SYSTEM_XFACE acpi_ev_asynch_enable_gpe(void *context); |
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|
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/******************************************************************************* |
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* |
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* FUNCTION: acpi_ev_update_gpe_enable_mask |
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* |
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* PARAMETERS: gpe_event_info - GPE to update |
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* |
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* RETURN: Status |
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* |
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* DESCRIPTION: Updates GPE register enable mask based upon whether there are |
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* runtime references to this GPE |
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* |
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******************************************************************************/ |
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acpi_status |
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acpi_ev_update_gpe_enable_mask(struct acpi_gpe_event_info *gpe_event_info) |
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{ |
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struct acpi_gpe_register_info *gpe_register_info; |
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u32 register_bit; |
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|
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ACPI_FUNCTION_TRACE(ev_update_gpe_enable_mask); |
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|
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gpe_register_info = gpe_event_info->register_info; |
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if (!gpe_register_info) { |
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return_ACPI_STATUS(AE_NOT_EXIST); |
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} |
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register_bit = acpi_hw_get_gpe_register_bit(gpe_event_info); |
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|
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/* Clear the run bit up front */ |
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ACPI_CLEAR_BIT(gpe_register_info->enable_for_run, register_bit); |
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|
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/* Set the mask bit only if there are references to this GPE */ |
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|
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if (gpe_event_info->runtime_count) { |
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ACPI_SET_BIT(gpe_register_info->enable_for_run, |
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(u8)register_bit); |
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} |
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|
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gpe_register_info->enable_mask = gpe_register_info->enable_for_run; |
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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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* |
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* FUNCTION: acpi_ev_enable_gpe |
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* |
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* PARAMETERS: gpe_event_info - GPE to enable |
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* |
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* RETURN: Status |
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* |
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* DESCRIPTION: Enable a GPE. |
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* |
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******************************************************************************/ |
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|
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acpi_status acpi_ev_enable_gpe(struct acpi_gpe_event_info *gpe_event_info) |
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{ |
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acpi_status status; |
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|
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ACPI_FUNCTION_TRACE(ev_enable_gpe); |
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|
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/* Enable the requested GPE */ |
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|
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status = acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_ENABLE); |
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return_ACPI_STATUS(status); |
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} |
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|
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/******************************************************************************* |
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* |
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* FUNCTION: acpi_ev_mask_gpe |
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* |
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* PARAMETERS: gpe_event_info - GPE to be blocked/unblocked |
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* is_masked - Whether the GPE is masked or not |
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* |
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* RETURN: Status |
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* |
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* DESCRIPTION: Unconditionally mask/unmask a GPE during runtime. |
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* |
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******************************************************************************/ |
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acpi_status |
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acpi_ev_mask_gpe(struct acpi_gpe_event_info *gpe_event_info, u8 is_masked) |
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{ |
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struct acpi_gpe_register_info *gpe_register_info; |
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u32 register_bit; |
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|
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ACPI_FUNCTION_TRACE(ev_mask_gpe); |
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gpe_register_info = gpe_event_info->register_info; |
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if (!gpe_register_info) { |
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return_ACPI_STATUS(AE_NOT_EXIST); |
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} |
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register_bit = acpi_hw_get_gpe_register_bit(gpe_event_info); |
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|
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/* Perform the action */ |
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|
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if (is_masked) { |
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if (register_bit & gpe_register_info->mask_for_run) { |
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return_ACPI_STATUS(AE_BAD_PARAMETER); |
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} |
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(void)acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_DISABLE); |
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ACPI_SET_BIT(gpe_register_info->mask_for_run, (u8)register_bit); |
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} else { |
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if (!(register_bit & gpe_register_info->mask_for_run)) { |
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return_ACPI_STATUS(AE_BAD_PARAMETER); |
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} |
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ACPI_CLEAR_BIT(gpe_register_info->mask_for_run, |
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(u8)register_bit); |
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if (gpe_event_info->runtime_count |
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&& !gpe_event_info->disable_for_dispatch) { |
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(void)acpi_hw_low_set_gpe(gpe_event_info, |
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ACPI_GPE_ENABLE); |
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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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* |
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* FUNCTION: acpi_ev_add_gpe_reference |
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* |
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* PARAMETERS: gpe_event_info - Add a reference to this GPE |
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* clear_on_enable - Clear GPE status before enabling it |
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* |
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* RETURN: Status |
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* |
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* DESCRIPTION: Add a reference to a GPE. On the first reference, the GPE is |
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* hardware-enabled. |
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* |
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******************************************************************************/ |
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|
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acpi_status |
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acpi_ev_add_gpe_reference(struct acpi_gpe_event_info *gpe_event_info, |
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u8 clear_on_enable) |
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{ |
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acpi_status status = AE_OK; |
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|
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ACPI_FUNCTION_TRACE(ev_add_gpe_reference); |
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|
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if (gpe_event_info->runtime_count == ACPI_UINT8_MAX) { |
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return_ACPI_STATUS(AE_LIMIT); |
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} |
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gpe_event_info->runtime_count++; |
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if (gpe_event_info->runtime_count == 1) { |
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|
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/* Enable on first reference */ |
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|
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if (clear_on_enable) { |
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(void)acpi_hw_clear_gpe(gpe_event_info); |
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} |
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|
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status = acpi_ev_update_gpe_enable_mask(gpe_event_info); |
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if (ACPI_SUCCESS(status)) { |
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status = acpi_ev_enable_gpe(gpe_event_info); |
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} |
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|
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if (ACPI_FAILURE(status)) { |
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gpe_event_info->runtime_count--; |
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} |
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} |
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return_ACPI_STATUS(status); |
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} |
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/******************************************************************************* |
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* |
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* FUNCTION: acpi_ev_remove_gpe_reference |
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* |
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* PARAMETERS: gpe_event_info - Remove a reference to this GPE |
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* |
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* RETURN: Status |
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* |
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* DESCRIPTION: Remove a reference to a GPE. When the last reference is |
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* removed, the GPE is hardware-disabled. |
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* |
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******************************************************************************/ |
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acpi_status |
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acpi_ev_remove_gpe_reference(struct acpi_gpe_event_info *gpe_event_info) |
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{ |
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acpi_status status = AE_OK; |
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ACPI_FUNCTION_TRACE(ev_remove_gpe_reference); |
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|
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if (!gpe_event_info->runtime_count) { |
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return_ACPI_STATUS(AE_LIMIT); |
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} |
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gpe_event_info->runtime_count--; |
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if (!gpe_event_info->runtime_count) { |
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/* Disable on last reference */ |
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status = acpi_ev_update_gpe_enable_mask(gpe_event_info); |
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if (ACPI_SUCCESS(status)) { |
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status = |
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acpi_hw_low_set_gpe(gpe_event_info, |
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ACPI_GPE_DISABLE); |
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} |
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|
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if (ACPI_FAILURE(status)) { |
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gpe_event_info->runtime_count++; |
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} |
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} |
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return_ACPI_STATUS(status); |
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} |
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|
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/******************************************************************************* |
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* |
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* FUNCTION: acpi_ev_low_get_gpe_info |
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* |
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* PARAMETERS: gpe_number - Raw GPE number |
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* gpe_block - A GPE info block |
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* |
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* RETURN: A GPE event_info struct. NULL if not a valid GPE (The gpe_number |
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* is not within the specified GPE block) |
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* |
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* DESCRIPTION: Returns the event_info struct associated with this GPE. This is |
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* the low-level implementation of ev_get_gpe_event_info. |
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* |
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******************************************************************************/ |
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|
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struct acpi_gpe_event_info *acpi_ev_low_get_gpe_info(u32 gpe_number, |
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struct acpi_gpe_block_info |
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*gpe_block) |
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{ |
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u32 gpe_index; |
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|
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/* |
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* Validate that the gpe_number is within the specified gpe_block. |
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* (Two steps) |
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*/ |
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if (!gpe_block || (gpe_number < gpe_block->block_base_number)) { |
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return (NULL); |
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} |
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gpe_index = gpe_number - gpe_block->block_base_number; |
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if (gpe_index >= gpe_block->gpe_count) { |
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return (NULL); |
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} |
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return (&gpe_block->event_info[gpe_index]); |
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} |
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|
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/******************************************************************************* |
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* |
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* FUNCTION: acpi_ev_get_gpe_event_info |
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* |
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* PARAMETERS: gpe_device - Device node. NULL for GPE0/GPE1 |
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* gpe_number - Raw GPE number |
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* |
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* RETURN: A GPE event_info struct. NULL if not a valid GPE |
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* |
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* DESCRIPTION: Returns the event_info struct associated with this GPE. |
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* Validates the gpe_block and the gpe_number |
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* |
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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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|
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struct acpi_gpe_event_info *acpi_ev_get_gpe_event_info(acpi_handle gpe_device, |
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u32 gpe_number) |
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{ |
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union acpi_operand_object *obj_desc; |
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struct acpi_gpe_event_info *gpe_info; |
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u32 i; |
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ACPI_FUNCTION_ENTRY(); |
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|
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/* A NULL gpe_device means use the FADT-defined GPE block(s) */ |
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if (!gpe_device) { |
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|
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/* Examine GPE Block 0 and 1 (These blocks are permanent) */ |
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for (i = 0; i < ACPI_MAX_GPE_BLOCKS; i++) { |
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gpe_info = acpi_ev_low_get_gpe_info(gpe_number, |
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acpi_gbl_gpe_fadt_blocks |
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[i]); |
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if (gpe_info) { |
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return (gpe_info); |
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} |
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} |
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/* The gpe_number was not in the range of either FADT GPE block */ |
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return (NULL); |
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} |
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|
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/* A Non-NULL gpe_device means this is a GPE Block Device */ |
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obj_desc = |
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acpi_ns_get_attached_object((struct acpi_namespace_node *) |
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gpe_device); |
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if (!obj_desc || !obj_desc->device.gpe_block) { |
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return (NULL); |
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} |
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|
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return (acpi_ev_low_get_gpe_info |
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(gpe_number, obj_desc->device.gpe_block)); |
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} |
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|
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/******************************************************************************* |
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* |
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* FUNCTION: acpi_ev_gpe_detect |
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* |
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* PARAMETERS: gpe_xrupt_list - Interrupt block for this interrupt. |
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* Can have multiple GPE blocks attached. |
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* |
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* RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED |
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* |
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* DESCRIPTION: Detect if any GP events have occurred. This function is |
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* executed at interrupt level. |
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* |
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******************************************************************************/ |
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|
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u32 acpi_ev_gpe_detect(struct acpi_gpe_xrupt_info *gpe_xrupt_list) |
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{ |
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struct acpi_gpe_block_info *gpe_block; |
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struct acpi_namespace_node *gpe_device; |
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struct acpi_gpe_register_info *gpe_register_info; |
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struct acpi_gpe_event_info *gpe_event_info; |
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u32 gpe_number; |
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u32 int_status = ACPI_INTERRUPT_NOT_HANDLED; |
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acpi_cpu_flags flags; |
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u32 i; |
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u32 j; |
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|
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ACPI_FUNCTION_NAME(ev_gpe_detect); |
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|
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/* Check for the case where there are no GPEs */ |
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|
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if (!gpe_xrupt_list) { |
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return (int_status); |
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} |
|
|
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/* |
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* We need to obtain the GPE lock for both the data structs and registers |
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* Note: Not necessary to obtain the hardware lock, since the GPE |
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* registers are owned by the gpe_lock. |
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*/ |
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flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
|
|
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/* Examine all GPE blocks attached to this interrupt level */ |
|
|
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gpe_block = gpe_xrupt_list->gpe_block_list_head; |
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while (gpe_block) { |
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gpe_device = gpe_block->node; |
|
|
|
/* |
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* Read all of the 8-bit GPE status and enable registers in this GPE |
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* block, saving all of them. Find all currently active GP events. |
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*/ |
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for (i = 0; i < gpe_block->register_count; i++) { |
|
|
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/* Get the next status/enable pair */ |
|
|
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gpe_register_info = &gpe_block->register_info[i]; |
|
|
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/* |
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* Optimization: If there are no GPEs enabled within this |
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* register, we can safely ignore the entire register. |
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*/ |
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if (!(gpe_register_info->enable_for_run | |
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gpe_register_info->enable_for_wake)) { |
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ACPI_DEBUG_PRINT((ACPI_DB_INTERRUPTS, |
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"Ignore disabled registers for GPE %02X-%02X: " |
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"RunEnable=%02X, WakeEnable=%02X\n", |
|
gpe_register_info-> |
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base_gpe_number, |
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gpe_register_info-> |
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base_gpe_number + |
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(ACPI_GPE_REGISTER_WIDTH - 1), |
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gpe_register_info-> |
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enable_for_run, |
|
gpe_register_info-> |
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enable_for_wake)); |
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continue; |
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} |
|
|
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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++) { |
|
|
|
/* Detect and dispatch one GPE bit */ |
|
|
|
gpe_event_info = |
|
&gpe_block-> |
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event_info[((acpi_size)i * |
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ACPI_GPE_REGISTER_WIDTH) + j]; |
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gpe_number = |
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j + gpe_register_info->base_gpe_number; |
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acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
|
int_status |= |
|
acpi_ev_detect_gpe(gpe_device, |
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gpe_event_info, |
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gpe_number); |
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flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
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} |
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} |
|
|
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gpe_block = gpe_block->next; |
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} |
|
|
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acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
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return (int_status); |
|
} |
|
|
|
/******************************************************************************* |
|
* |
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* FUNCTION: acpi_ev_asynch_execute_gpe_method |
|
* |
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* PARAMETERS: Context (gpe_event_info) - Info for this GPE |
|
* |
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* RETURN: None |
|
* |
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* DESCRIPTION: Perform the actual execution of a GPE control method. This |
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* function is called from an invocation of acpi_os_execute and |
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* therefore does NOT execute at interrupt level - so that |
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* the control method itself is not executed in the context of |
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* an interrupt handler. |
|
* |
|
******************************************************************************/ |
|
|
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static void ACPI_SYSTEM_XFACE acpi_ev_asynch_execute_gpe_method(void *context) |
|
{ |
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struct acpi_gpe_event_info *gpe_event_info = context; |
|
acpi_status status = AE_OK; |
|
struct acpi_evaluate_info *info; |
|
struct acpi_gpe_notify_info *notify; |
|
|
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ACPI_FUNCTION_TRACE(ev_asynch_execute_gpe_method); |
|
|
|
/* Do the correct dispatch - normal method or implicit notify */ |
|
|
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switch (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags)) { |
|
case ACPI_GPE_DISPATCH_NOTIFY: |
|
/* |
|
* Implicit notify. |
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* Dispatch a DEVICE_WAKE notify to the appropriate handler. |
|
* NOTE: the request is queued for execution after this method |
|
* completes. The notify handlers are NOT invoked synchronously |
|
* from this thread -- because handlers may in turn run other |
|
* control methods. |
|
* |
|
* June 2012: Expand implicit notify mechanism to support |
|
* notifies on multiple device objects. |
|
*/ |
|
notify = gpe_event_info->dispatch.notify_list; |
|
while (ACPI_SUCCESS(status) && notify) { |
|
status = |
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acpi_ev_queue_notify_request(notify->device_node, |
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ACPI_NOTIFY_DEVICE_WAKE); |
|
|
|
notify = notify->next; |
|
} |
|
|
|
break; |
|
|
|
case ACPI_GPE_DISPATCH_METHOD: |
|
|
|
/* Allocate the evaluation information block */ |
|
|
|
info = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_evaluate_info)); |
|
if (!info) { |
|
status = AE_NO_MEMORY; |
|
} else { |
|
/* |
|
* Invoke the GPE Method (_Lxx, _Exx) i.e., evaluate the |
|
* _Lxx/_Exx control method that corresponds to this GPE |
|
*/ |
|
info->prefix_node = |
|
gpe_event_info->dispatch.method_node; |
|
info->flags = ACPI_IGNORE_RETURN_VALUE; |
|
|
|
status = acpi_ns_evaluate(info); |
|
ACPI_FREE(info); |
|
} |
|
|
|
if (ACPI_FAILURE(status)) { |
|
ACPI_EXCEPTION((AE_INFO, status, |
|
"while evaluating GPE method [%4.4s]", |
|
acpi_ut_get_node_name(gpe_event_info-> |
|
dispatch. |
|
method_node))); |
|
} |
|
break; |
|
|
|
default: |
|
|
|
goto error_exit; /* Should never happen */ |
|
} |
|
|
|
/* Defer enabling of GPE until all notify handlers are done */ |
|
|
|
status = acpi_os_execute(OSL_NOTIFY_HANDLER, |
|
acpi_ev_asynch_enable_gpe, gpe_event_info); |
|
if (ACPI_SUCCESS(status)) { |
|
return_VOID; |
|
} |
|
|
|
error_exit: |
|
acpi_ev_asynch_enable_gpe(gpe_event_info); |
|
return_VOID; |
|
} |
|
|
|
|
|
/******************************************************************************* |
|
* |
|
* FUNCTION: acpi_ev_asynch_enable_gpe |
|
* |
|
* PARAMETERS: Context (gpe_event_info) - Info for this GPE |
|
* Callback from acpi_os_execute |
|
* |
|
* RETURN: None |
|
* |
|
* DESCRIPTION: Asynchronous clear/enable for GPE. This allows the GPE to |
|
* complete (i.e., finish execution of Notify) |
|
* |
|
******************************************************************************/ |
|
|
|
static void ACPI_SYSTEM_XFACE acpi_ev_asynch_enable_gpe(void *context) |
|
{ |
|
struct acpi_gpe_event_info *gpe_event_info = context; |
|
acpi_cpu_flags flags; |
|
|
|
flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
|
(void)acpi_ev_finish_gpe(gpe_event_info); |
|
acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
|
|
|
return; |
|
} |
|
|
|
|
|
/******************************************************************************* |
|
* |
|
* FUNCTION: acpi_ev_finish_gpe |
|
* |
|
* PARAMETERS: gpe_event_info - Info for this GPE |
|
* |
|
* RETURN: Status |
|
* |
|
* DESCRIPTION: Clear/Enable a GPE. Common code that is used after execution |
|
* of a GPE method or a synchronous or asynchronous GPE handler. |
|
* |
|
******************************************************************************/ |
|
|
|
acpi_status acpi_ev_finish_gpe(struct acpi_gpe_event_info *gpe_event_info) |
|
{ |
|
acpi_status status; |
|
|
|
if ((gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK) == |
|
ACPI_GPE_LEVEL_TRIGGERED) { |
|
/* |
|
* GPE is level-triggered, we clear the GPE status bit after |
|
* handling the event. |
|
*/ |
|
status = acpi_hw_clear_gpe(gpe_event_info); |
|
if (ACPI_FAILURE(status)) { |
|
return (status); |
|
} |
|
} |
|
|
|
/* |
|
* Enable this GPE, conditionally. This means that the GPE will |
|
* only be physically enabled if the enable_mask bit is set |
|
* in the event_info. |
|
*/ |
|
(void)acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_CONDITIONAL_ENABLE); |
|
gpe_event_info->disable_for_dispatch = FALSE; |
|
return (AE_OK); |
|
} |
|
|
|
|
|
/******************************************************************************* |
|
* |
|
* FUNCTION: acpi_ev_detect_gpe |
|
* |
|
* PARAMETERS: gpe_device - Device node. NULL for GPE0/GPE1 |
|
* gpe_event_info - Info for this GPE |
|
* gpe_number - Number relative to the parent GPE block |
|
* |
|
* RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED |
|
* |
|
* DESCRIPTION: Detect and dispatch a General Purpose Event to either a function |
|
* (e.g. EC) or method (e.g. _Lxx/_Exx) handler. |
|
* NOTE: GPE is W1C, so it is possible to handle a single GPE from both |
|
* task and irq context in parallel as long as the process to |
|
* detect and mask the GPE is atomic. |
|
* However the atomicity of ACPI_GPE_DISPATCH_RAW_HANDLER is |
|
* dependent on the raw handler itself. |
|
* |
|
******************************************************************************/ |
|
|
|
u32 |
|
acpi_ev_detect_gpe(struct acpi_namespace_node *gpe_device, |
|
struct acpi_gpe_event_info *gpe_event_info, u32 gpe_number) |
|
{ |
|
u32 int_status = ACPI_INTERRUPT_NOT_HANDLED; |
|
u8 enabled_status_byte; |
|
u64 status_reg; |
|
u64 enable_reg; |
|
u32 register_bit; |
|
struct acpi_gpe_register_info *gpe_register_info; |
|
struct acpi_gpe_handler_info *gpe_handler_info; |
|
acpi_cpu_flags flags; |
|
acpi_status status; |
|
|
|
ACPI_FUNCTION_TRACE(ev_gpe_detect); |
|
|
|
flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
|
|
|
if (!gpe_event_info) { |
|
gpe_event_info = acpi_ev_get_gpe_event_info(gpe_device, gpe_number); |
|
if (!gpe_event_info) |
|
goto error_exit; |
|
} |
|
|
|
/* Get the info block for the entire GPE register */ |
|
|
|
gpe_register_info = gpe_event_info->register_info; |
|
|
|
/* Get the register bitmask for this GPE */ |
|
|
|
register_bit = acpi_hw_get_gpe_register_bit(gpe_event_info); |
|
|
|
/* GPE currently enabled (enable bit == 1)? */ |
|
|
|
status = acpi_hw_gpe_read(&enable_reg, &gpe_register_info->enable_address); |
|
if (ACPI_FAILURE(status)) { |
|
goto error_exit; |
|
} |
|
|
|
/* GPE currently active (status bit == 1)? */ |
|
|
|
status = acpi_hw_gpe_read(&status_reg, &gpe_register_info->status_address); |
|
if (ACPI_FAILURE(status)) { |
|
goto error_exit; |
|
} |
|
|
|
/* Check if there is anything active at all in this GPE */ |
|
|
|
ACPI_DEBUG_PRINT((ACPI_DB_INTERRUPTS, |
|
"Read registers for GPE %02X: Status=%02X, Enable=%02X, " |
|
"RunEnable=%02X, WakeEnable=%02X\n", |
|
gpe_number, |
|
(u32)(status_reg & register_bit), |
|
(u32)(enable_reg & register_bit), |
|
gpe_register_info->enable_for_run, |
|
gpe_register_info->enable_for_wake)); |
|
|
|
enabled_status_byte = (u8)(status_reg & enable_reg); |
|
if (!(enabled_status_byte & register_bit)) { |
|
goto error_exit; |
|
} |
|
|
|
/* Invoke global event handler if present */ |
|
|
|
acpi_gpe_count++; |
|
if (acpi_gbl_global_event_handler) { |
|
acpi_gbl_global_event_handler(ACPI_EVENT_TYPE_GPE, |
|
gpe_device, gpe_number, |
|
acpi_gbl_global_event_handler_context); |
|
} |
|
|
|
/* Found an active GPE */ |
|
|
|
if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) == |
|
ACPI_GPE_DISPATCH_RAW_HANDLER) { |
|
|
|
/* Dispatch the event to a raw handler */ |
|
|
|
gpe_handler_info = gpe_event_info->dispatch.handler; |
|
|
|
/* |
|
* There is no protection around the namespace node |
|
* and the GPE handler to ensure a safe destruction |
|
* because: |
|
* 1. The namespace node is expected to always |
|
* exist after loading a table. |
|
* 2. The GPE handler is expected to be flushed by |
|
* acpi_os_wait_events_complete() before the |
|
* destruction. |
|
*/ |
|
acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
|
int_status |= |
|
gpe_handler_info->address(gpe_device, gpe_number, |
|
gpe_handler_info->context); |
|
flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock); |
|
} else { |
|
/* Dispatch the event to a standard handler or method. */ |
|
|
|
int_status |= acpi_ev_gpe_dispatch(gpe_device, |
|
gpe_event_info, gpe_number); |
|
} |
|
|
|
error_exit: |
|
acpi_os_release_lock(acpi_gbl_gpe_lock, flags); |
|
return (int_status); |
|
} |
|
|
|
/******************************************************************************* |
|
* |
|
* FUNCTION: acpi_ev_gpe_dispatch |
|
* |
|
* PARAMETERS: gpe_device - Device node. NULL for GPE0/GPE1 |
|
* gpe_event_info - Info for this GPE |
|
* gpe_number - Number relative to the parent GPE block |
|
* |
|
* RETURN: INTERRUPT_HANDLED or INTERRUPT_NOT_HANDLED |
|
* |
|
* DESCRIPTION: Dispatch a General Purpose Event to either a function (e.g. EC) |
|
* or method (e.g. _Lxx/_Exx) handler. |
|
* |
|
******************************************************************************/ |
|
|
|
u32 |
|
acpi_ev_gpe_dispatch(struct acpi_namespace_node *gpe_device, |
|
struct acpi_gpe_event_info *gpe_event_info, u32 gpe_number) |
|
{ |
|
acpi_status status; |
|
u32 return_value; |
|
|
|
ACPI_FUNCTION_TRACE(ev_gpe_dispatch); |
|
|
|
/* |
|
* Always disable the GPE so that it does not keep firing before |
|
* any asynchronous activity completes (either from the execution |
|
* of a GPE method or an asynchronous GPE handler.) |
|
* |
|
* If there is no handler or method to run, just disable the |
|
* GPE and leave it disabled permanently to prevent further such |
|
* pointless events from firing. |
|
*/ |
|
status = acpi_hw_low_set_gpe(gpe_event_info, ACPI_GPE_DISABLE); |
|
if (ACPI_FAILURE(status)) { |
|
ACPI_EXCEPTION((AE_INFO, status, |
|
"Unable to disable GPE %02X", gpe_number)); |
|
return_UINT32(ACPI_INTERRUPT_NOT_HANDLED); |
|
} |
|
|
|
/* |
|
* If edge-triggered, clear the GPE status bit now. Note that |
|
* level-triggered events are cleared after the GPE is serviced. |
|
*/ |
|
if ((gpe_event_info->flags & ACPI_GPE_XRUPT_TYPE_MASK) == |
|
ACPI_GPE_EDGE_TRIGGERED) { |
|
status = acpi_hw_clear_gpe(gpe_event_info); |
|
if (ACPI_FAILURE(status)) { |
|
ACPI_EXCEPTION((AE_INFO, status, |
|
"Unable to clear GPE %02X", |
|
gpe_number)); |
|
(void)acpi_hw_low_set_gpe(gpe_event_info, |
|
ACPI_GPE_CONDITIONAL_ENABLE); |
|
return_UINT32(ACPI_INTERRUPT_NOT_HANDLED); |
|
} |
|
} |
|
|
|
gpe_event_info->disable_for_dispatch = TRUE; |
|
|
|
/* |
|
* Dispatch the GPE to either an installed handler or the control |
|
* method associated with this GPE (_Lxx or _Exx). If a handler |
|
* exists, we invoke it and do not attempt to run the method. |
|
* If there is neither a handler nor a method, leave the GPE |
|
* disabled. |
|
*/ |
|
switch (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags)) { |
|
case ACPI_GPE_DISPATCH_HANDLER: |
|
|
|
/* Invoke the installed handler (at interrupt level) */ |
|
|
|
return_value = |
|
gpe_event_info->dispatch.handler->address(gpe_device, |
|
gpe_number, |
|
gpe_event_info-> |
|
dispatch.handler-> |
|
context); |
|
|
|
/* If requested, clear (if level-triggered) and re-enable the GPE */ |
|
|
|
if (return_value & ACPI_REENABLE_GPE) { |
|
(void)acpi_ev_finish_gpe(gpe_event_info); |
|
} |
|
break; |
|
|
|
case ACPI_GPE_DISPATCH_METHOD: |
|
case ACPI_GPE_DISPATCH_NOTIFY: |
|
/* |
|
* Execute the method associated with the GPE |
|
* NOTE: Level-triggered GPEs are cleared after the method completes. |
|
*/ |
|
status = acpi_os_execute(OSL_GPE_HANDLER, |
|
acpi_ev_asynch_execute_gpe_method, |
|
gpe_event_info); |
|
if (ACPI_FAILURE(status)) { |
|
ACPI_EXCEPTION((AE_INFO, status, |
|
"Unable to queue handler for GPE %02X - event disabled", |
|
gpe_number)); |
|
} |
|
break; |
|
|
|
default: |
|
/* |
|
* No handler or method to run! |
|
* 03/2010: This case should no longer be possible. We will not allow |
|
* a GPE to be enabled if it has no handler or method. |
|
*/ |
|
ACPI_ERROR((AE_INFO, |
|
"No handler or method for GPE %02X, disabling event", |
|
gpe_number)); |
|
|
|
break; |
|
} |
|
|
|
return_UINT32(ACPI_INTERRUPT_HANDLED); |
|
} |
|
|
|
#endif /* !ACPI_REDUCED_HARDWARE */
|
|
|