502 lines
14 KiB
C
502 lines
14 KiB
C
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
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/******************************************************************************
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*
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* Module Name: evgpeblk - GPE block creation and initialization.
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*
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* Copyright (C) 2000 - 2022, Intel Corp.
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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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#define _COMPONENT ACPI_EVENTS
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ACPI_MODULE_NAME("evgpeblk")
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#if (!ACPI_REDUCED_HARDWARE) /* Entire module */
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/* Local prototypes */
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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_install_gpe_block
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*
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* PARAMETERS: gpe_block - New GPE block
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* interrupt_number - Xrupt to be associated with this
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* GPE block
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*
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* RETURN: Status
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*
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* DESCRIPTION: Install new GPE block with mutex support
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*
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******************************************************************************/
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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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{
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struct acpi_gpe_block_info *next_gpe_block;
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struct acpi_gpe_xrupt_info *gpe_xrupt_block;
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acpi_status status;
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acpi_cpu_flags flags;
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ACPI_FUNCTION_TRACE(ev_install_gpe_block);
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status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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status =
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acpi_ev_get_gpe_xrupt_block(interrupt_number, &gpe_xrupt_block);
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if (ACPI_FAILURE(status)) {
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goto unlock_and_exit;
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}
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/* Install the new block at the end of the list with lock */
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flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
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if (gpe_xrupt_block->gpe_block_list_head) {
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next_gpe_block = gpe_xrupt_block->gpe_block_list_head;
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while (next_gpe_block->next) {
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next_gpe_block = next_gpe_block->next;
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}
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next_gpe_block->next = gpe_block;
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gpe_block->previous = next_gpe_block;
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} else {
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gpe_xrupt_block->gpe_block_list_head = gpe_block;
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}
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gpe_block->xrupt_block = gpe_xrupt_block;
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acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
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unlock_and_exit:
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(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
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return_ACPI_STATUS(status);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ev_delete_gpe_block
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*
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* PARAMETERS: gpe_block - Existing GPE block
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*
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* RETURN: Status
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*
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* DESCRIPTION: Remove a GPE block
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*
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******************************************************************************/
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acpi_status acpi_ev_delete_gpe_block(struct acpi_gpe_block_info *gpe_block)
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{
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acpi_status status;
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acpi_cpu_flags flags;
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ACPI_FUNCTION_TRACE(ev_install_gpe_block);
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status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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/* Disable all GPEs in this block */
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status =
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acpi_hw_disable_gpe_block(gpe_block->xrupt_block, gpe_block, NULL);
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if (ACPI_FAILURE(status)) {
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return_ACPI_STATUS(status);
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}
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if (!gpe_block->previous && !gpe_block->next) {
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/* This is the last gpe_block on this interrupt */
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status = acpi_ev_delete_gpe_xrupt(gpe_block->xrupt_block);
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if (ACPI_FAILURE(status)) {
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goto unlock_and_exit;
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}
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} else {
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/* Remove the block on this interrupt with lock */
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flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
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if (gpe_block->previous) {
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gpe_block->previous->next = gpe_block->next;
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} else {
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gpe_block->xrupt_block->gpe_block_list_head =
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gpe_block->next;
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}
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if (gpe_block->next) {
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gpe_block->next->previous = gpe_block->previous;
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}
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acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
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}
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acpi_current_gpe_count -= gpe_block->gpe_count;
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/* Free the gpe_block */
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ACPI_FREE(gpe_block->register_info);
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ACPI_FREE(gpe_block->event_info);
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ACPI_FREE(gpe_block);
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unlock_and_exit:
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status = acpi_ut_release_mutex(ACPI_MTX_EVENTS);
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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_create_gpe_info_blocks
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*
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* PARAMETERS: gpe_block - New GPE block
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*
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* RETURN: Status
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*
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* DESCRIPTION: Create the register_info and event_info blocks for this GPE block
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*
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******************************************************************************/
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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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struct acpi_gpe_register_info *gpe_register_info = NULL;
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struct acpi_gpe_event_info *gpe_event_info = NULL;
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struct acpi_gpe_event_info *this_event;
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struct acpi_gpe_register_info *this_register;
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u32 i;
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u32 j;
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acpi_status status;
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ACPI_FUNCTION_TRACE(ev_create_gpe_info_blocks);
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/* Allocate the GPE register information block */
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gpe_register_info = ACPI_ALLOCATE_ZEROED((acpi_size)gpe_block->
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register_count *
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sizeof(struct
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acpi_gpe_register_info));
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if (!gpe_register_info) {
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ACPI_ERROR((AE_INFO,
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"Could not allocate the GpeRegisterInfo table"));
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return_ACPI_STATUS(AE_NO_MEMORY);
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}
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/*
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* Allocate the GPE event_info block. There are eight distinct GPEs
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* per register. Initialization to zeros is sufficient.
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*/
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gpe_event_info = ACPI_ALLOCATE_ZEROED((acpi_size)gpe_block->gpe_count *
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sizeof(struct
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acpi_gpe_event_info));
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if (!gpe_event_info) {
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ACPI_ERROR((AE_INFO,
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"Could not allocate the GpeEventInfo table"));
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status = AE_NO_MEMORY;
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goto error_exit;
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}
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/* Save the new Info arrays in the GPE block */
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gpe_block->register_info = gpe_register_info;
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gpe_block->event_info = gpe_event_info;
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/*
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* Initialize the GPE Register and Event structures. A goal of these
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* tables is to hide the fact that there are two separate GPE register
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* sets in a given GPE hardware block, the status registers occupy the
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* first half, and the enable registers occupy the second half.
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*/
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this_register = gpe_register_info;
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this_event = gpe_event_info;
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for (i = 0; i < gpe_block->register_count; i++) {
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/* Init the register_info for this GPE register (8 GPEs) */
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this_register->base_gpe_number = (u16)
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(gpe_block->block_base_number +
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(i * ACPI_GPE_REGISTER_WIDTH));
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this_register->status_address.address = gpe_block->address + i;
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this_register->enable_address.address =
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gpe_block->address + i + gpe_block->register_count;
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this_register->status_address.space_id = gpe_block->space_id;
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this_register->enable_address.space_id = gpe_block->space_id;
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/* Init the event_info for each GPE within this register */
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for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) {
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this_event->gpe_number =
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(u8) (this_register->base_gpe_number + j);
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this_event->register_info = this_register;
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this_event++;
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}
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/* Disable all GPEs within this register */
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status = acpi_hw_gpe_write(0x00, &this_register->enable_address);
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if (ACPI_FAILURE(status)) {
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goto error_exit;
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}
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/* Clear any pending GPE events within this register */
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status = acpi_hw_gpe_write(0xFF, &this_register->status_address);
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if (ACPI_FAILURE(status)) {
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goto error_exit;
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}
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this_register++;
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}
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return_ACPI_STATUS(AE_OK);
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error_exit:
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if (gpe_register_info) {
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ACPI_FREE(gpe_register_info);
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}
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if (gpe_event_info) {
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ACPI_FREE(gpe_event_info);
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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_create_gpe_block
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*
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* PARAMETERS: gpe_device - Handle to the parent GPE block
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* gpe_block_address - Address and space_ID
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* register_count - Number of GPE register pairs in the block
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* gpe_block_base_number - Starting GPE number for the block
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* interrupt_number - H/W interrupt for the block
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* return_gpe_block - Where the new block descriptor is returned
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*
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* RETURN: Status
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*
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* DESCRIPTION: Create and Install a block of GPE registers. All GPEs within
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* the block are disabled at exit.
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* Note: Assumes namespace is locked.
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*
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******************************************************************************/
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acpi_status
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acpi_ev_create_gpe_block(struct acpi_namespace_node *gpe_device,
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u64 address,
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u8 space_id,
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u32 register_count,
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u16 gpe_block_base_number,
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u32 interrupt_number,
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struct acpi_gpe_block_info **return_gpe_block)
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{
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acpi_status status;
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struct acpi_gpe_block_info *gpe_block;
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struct acpi_gpe_walk_info walk_info;
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ACPI_FUNCTION_TRACE(ev_create_gpe_block);
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if (!register_count) {
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return_ACPI_STATUS(AE_OK);
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}
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/* Validate the space_ID */
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if ((space_id != ACPI_ADR_SPACE_SYSTEM_MEMORY) &&
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(space_id != ACPI_ADR_SPACE_SYSTEM_IO)) {
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ACPI_ERROR((AE_INFO,
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"Unsupported address space: 0x%X", space_id));
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return_ACPI_STATUS(AE_SUPPORT);
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}
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if (space_id == ACPI_ADR_SPACE_SYSTEM_IO) {
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status = acpi_hw_validate_io_block(address,
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ACPI_GPE_REGISTER_WIDTH,
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register_count);
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if (ACPI_FAILURE(status))
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return_ACPI_STATUS(status);
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}
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/* Allocate a new GPE block */
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gpe_block = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_block_info));
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if (!gpe_block) {
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return_ACPI_STATUS(AE_NO_MEMORY);
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}
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/* Initialize the new GPE block */
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gpe_block->address = address;
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gpe_block->space_id = space_id;
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gpe_block->node = gpe_device;
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gpe_block->gpe_count = (u16)(register_count * ACPI_GPE_REGISTER_WIDTH);
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gpe_block->initialized = FALSE;
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gpe_block->register_count = register_count;
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gpe_block->block_base_number = gpe_block_base_number;
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/*
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* Create the register_info and event_info sub-structures
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* Note: disables and clears all GPEs in the block
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*/
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status = acpi_ev_create_gpe_info_blocks(gpe_block);
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if (ACPI_FAILURE(status)) {
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ACPI_FREE(gpe_block);
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return_ACPI_STATUS(status);
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}
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/* Install the new block in the global lists */
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status = acpi_ev_install_gpe_block(gpe_block, interrupt_number);
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if (ACPI_FAILURE(status)) {
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ACPI_FREE(gpe_block->register_info);
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ACPI_FREE(gpe_block->event_info);
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ACPI_FREE(gpe_block);
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return_ACPI_STATUS(status);
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}
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acpi_gbl_all_gpes_initialized = FALSE;
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/* Find all GPE methods (_Lxx or_Exx) for this block */
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walk_info.gpe_block = gpe_block;
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walk_info.gpe_device = gpe_device;
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walk_info.execute_by_owner_id = FALSE;
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(void)acpi_ns_walk_namespace(ACPI_TYPE_METHOD, gpe_device,
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ACPI_UINT32_MAX, ACPI_NS_WALK_NO_UNLOCK,
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acpi_ev_match_gpe_method, NULL, &walk_info,
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NULL);
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/* Return the new block */
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if (return_gpe_block) {
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(*return_gpe_block) = gpe_block;
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}
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ACPI_DEBUG_PRINT_RAW((ACPI_DB_INIT,
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" Initialized GPE %02X to %02X [%4.4s] %u regs on interrupt 0x%X%s\n",
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(u32)gpe_block->block_base_number,
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(u32)(gpe_block->block_base_number +
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(gpe_block->gpe_count - 1)),
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gpe_device->name.ascii, gpe_block->register_count,
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interrupt_number,
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interrupt_number ==
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acpi_gbl_FADT.sci_interrupt ? " (SCI)" : ""));
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/* Update global count of currently available GPEs */
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acpi_current_gpe_count += gpe_block->gpe_count;
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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_initialize_gpe_block
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*
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* PARAMETERS: acpi_gpe_callback
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*
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* RETURN: Status
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*
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* DESCRIPTION: Initialize and enable a GPE block. Enable GPEs that have
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* associated methods.
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* Note: Assumes namespace is locked.
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*
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******************************************************************************/
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acpi_status
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acpi_ev_initialize_gpe_block(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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acpi_status status;
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struct acpi_gpe_event_info *gpe_event_info;
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u32 gpe_enabled_count;
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u32 gpe_index;
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u32 i;
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u32 j;
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u8 *is_polling_needed = context;
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ACPI_ERROR_ONLY(u32 gpe_number);
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ACPI_FUNCTION_TRACE(ev_initialize_gpe_block);
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/*
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* Ignore a null GPE block (e.g., if no GPE block 1 exists), and
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* any GPE blocks that have been initialized already.
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*/
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if (!gpe_block || gpe_block->initialized) {
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return_ACPI_STATUS(AE_OK);
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}
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/*
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* Enable all GPEs that have a corresponding method and have the
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* ACPI_GPE_CAN_WAKE flag unset. Any other GPEs within this block
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* must be enabled via the acpi_enable_gpe() interface.
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*/
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gpe_enabled_count = 0;
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for (i = 0; i < gpe_block->register_count; i++) {
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for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) {
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/* Get the info block for this particular GPE */
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gpe_index = (i * ACPI_GPE_REGISTER_WIDTH) + j;
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gpe_event_info = &gpe_block->event_info[gpe_index];
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ACPI_ERROR_ONLY(gpe_number =
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gpe_block->block_base_number +
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gpe_index);
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gpe_event_info->flags |= ACPI_GPE_INITIALIZED;
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/*
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* Ignore GPEs that have no corresponding _Lxx/_Exx method
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* and GPEs that are used for wakeup
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*/
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if ((ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) !=
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ACPI_GPE_DISPATCH_METHOD)
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|| (gpe_event_info->flags & ACPI_GPE_CAN_WAKE)) {
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continue;
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}
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status = acpi_ev_add_gpe_reference(gpe_event_info, FALSE);
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if (ACPI_FAILURE(status)) {
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ACPI_EXCEPTION((AE_INFO, status,
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"Could not enable GPE 0x%02X",
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gpe_number));
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continue;
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}
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gpe_event_info->flags |= ACPI_GPE_AUTO_ENABLED;
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if (is_polling_needed &&
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ACPI_GPE_IS_POLLING_NEEDED(gpe_event_info)) {
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*is_polling_needed = TRUE;
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}
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gpe_enabled_count++;
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}
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}
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if (gpe_enabled_count) {
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ACPI_INFO(("Enabled %u GPEs in block %02X to %02X",
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gpe_enabled_count, (u32)gpe_block->block_base_number,
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(u32)(gpe_block->block_base_number +
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(gpe_block->gpe_count - 1))));
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}
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gpe_block->initialized = TRUE;
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return_ACPI_STATUS(AE_OK);
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}
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#endif /* !ACPI_REDUCED_HARDWARE */
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