327 lines
8.8 KiB
C
327 lines
8.8 KiB
C
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
|
|
/******************************************************************************
|
|
*
|
|
* Module Name: evgpeutil - GPE utilities
|
|
*
|
|
* Copyright (C) 2000 - 2022, Intel Corp.
|
|
*
|
|
*****************************************************************************/
|
|
|
|
#include <acpi/acpi.h>
|
|
#include "accommon.h"
|
|
#include "acevents.h"
|
|
|
|
#define _COMPONENT ACPI_EVENTS
|
|
ACPI_MODULE_NAME("evgpeutil")
|
|
|
|
#if (!ACPI_REDUCED_HARDWARE) /* Entire module */
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ev_walk_gpe_list
|
|
*
|
|
* PARAMETERS: gpe_walk_callback - Routine called for each GPE block
|
|
* context - Value passed to callback
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Walk the GPE lists.
|
|
*
|
|
******************************************************************************/
|
|
acpi_status
|
|
acpi_ev_walk_gpe_list(acpi_gpe_callback gpe_walk_callback, void *context)
|
|
{
|
|
struct acpi_gpe_block_info *gpe_block;
|
|
struct acpi_gpe_xrupt_info *gpe_xrupt_info;
|
|
acpi_status status = AE_OK;
|
|
acpi_cpu_flags flags;
|
|
|
|
ACPI_FUNCTION_TRACE(ev_walk_gpe_list);
|
|
|
|
flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
|
|
|
|
/* Walk the interrupt level descriptor list */
|
|
|
|
gpe_xrupt_info = acpi_gbl_gpe_xrupt_list_head;
|
|
while (gpe_xrupt_info) {
|
|
|
|
/* Walk all Gpe Blocks attached to this interrupt level */
|
|
|
|
gpe_block = gpe_xrupt_info->gpe_block_list_head;
|
|
while (gpe_block) {
|
|
|
|
/* One callback per GPE block */
|
|
|
|
status =
|
|
gpe_walk_callback(gpe_xrupt_info, gpe_block,
|
|
context);
|
|
if (ACPI_FAILURE(status)) {
|
|
if (status == AE_CTRL_END) { /* Callback abort */
|
|
status = AE_OK;
|
|
}
|
|
goto unlock_and_exit;
|
|
}
|
|
|
|
gpe_block = gpe_block->next;
|
|
}
|
|
|
|
gpe_xrupt_info = gpe_xrupt_info->next;
|
|
}
|
|
|
|
unlock_and_exit:
|
|
acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ev_get_gpe_device
|
|
*
|
|
* PARAMETERS: GPE_WALK_CALLBACK
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Matches the input GPE index (0-current_gpe_count) with a GPE
|
|
* block device. NULL if the GPE is one of the FADT-defined GPEs.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_ev_get_gpe_device(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
|
|
struct acpi_gpe_block_info *gpe_block, void *context)
|
|
{
|
|
struct acpi_gpe_device_info *info = context;
|
|
|
|
/* Increment Index by the number of GPEs in this block */
|
|
|
|
info->next_block_base_index += gpe_block->gpe_count;
|
|
|
|
if (info->index < info->next_block_base_index) {
|
|
/*
|
|
* The GPE index is within this block, get the node. Leave the node
|
|
* NULL for the FADT-defined GPEs
|
|
*/
|
|
if ((gpe_block->node)->type == ACPI_TYPE_DEVICE) {
|
|
info->gpe_device = gpe_block->node;
|
|
}
|
|
|
|
info->status = AE_OK;
|
|
return (AE_CTRL_END);
|
|
}
|
|
|
|
return (AE_OK);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_ev_get_gpe_xrupt_block
|
|
*
|
|
* PARAMETERS: interrupt_number - Interrupt for a GPE block
|
|
* gpe_xrupt_block - Where the block is returned
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* 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.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_ev_get_gpe_xrupt_block(u32 interrupt_number,
|
|
struct acpi_gpe_xrupt_info **gpe_xrupt_block)
|
|
{
|
|
struct acpi_gpe_xrupt_info *next_gpe_xrupt;
|
|
struct acpi_gpe_xrupt_info *gpe_xrupt;
|
|
acpi_status status;
|
|
acpi_cpu_flags flags;
|
|
|
|
ACPI_FUNCTION_TRACE(ev_get_gpe_xrupt_block);
|
|
|
|
/* No need for lock since we are not changing any list elements here */
|
|
|
|
next_gpe_xrupt = acpi_gbl_gpe_xrupt_list_head;
|
|
while (next_gpe_xrupt) {
|
|
if (next_gpe_xrupt->interrupt_number == interrupt_number) {
|
|
*gpe_xrupt_block = next_gpe_xrupt;
|
|
return_ACPI_STATUS(AE_OK);
|
|
}
|
|
|
|
next_gpe_xrupt = next_gpe_xrupt->next;
|
|
}
|
|
|
|
/* Not found, must allocate a new xrupt descriptor */
|
|
|
|
gpe_xrupt = ACPI_ALLOCATE_ZEROED(sizeof(struct acpi_gpe_xrupt_info));
|
|
if (!gpe_xrupt) {
|
|
return_ACPI_STATUS(AE_NO_MEMORY);
|
|
}
|
|
|
|
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_EXCEPTION((AE_INFO, status,
|
|
"Could not install GPE interrupt handler at level 0x%X",
|
|
interrupt_number));
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
}
|
|
|
|
*gpe_xrupt_block = gpe_xrupt;
|
|
return_ACPI_STATUS(AE_OK);
|
|
}
|
|
|
|
/*******************************************************************************
|
|
*
|
|
* 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.
|
|
*
|
|
******************************************************************************/
|
|
|
|
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_delete_gpe_handlers
|
|
*
|
|
* PARAMETERS: gpe_xrupt_info - GPE Interrupt info
|
|
* gpe_block - Gpe Block info
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Delete all Handler objects found in the GPE data structs.
|
|
* Used only prior to termination.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_ev_delete_gpe_handlers(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
|
|
struct acpi_gpe_block_info *gpe_block,
|
|
void *context)
|
|
{
|
|
struct acpi_gpe_event_info *gpe_event_info;
|
|
struct acpi_gpe_notify_info *notify;
|
|
struct acpi_gpe_notify_info *next;
|
|
u32 i;
|
|
u32 j;
|
|
|
|
ACPI_FUNCTION_TRACE(ev_delete_gpe_handlers);
|
|
|
|
/* Examine each GPE Register within the block */
|
|
|
|
for (i = 0; i < gpe_block->register_count; i++) {
|
|
|
|
/* Now look at the individual GPEs in this byte register */
|
|
|
|
for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) {
|
|
gpe_event_info = &gpe_block->event_info[((acpi_size)i *
|
|
ACPI_GPE_REGISTER_WIDTH)
|
|
+ j];
|
|
|
|
if ((ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
|
|
ACPI_GPE_DISPATCH_HANDLER) ||
|
|
(ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
|
|
ACPI_GPE_DISPATCH_RAW_HANDLER)) {
|
|
|
|
/* Delete an installed handler block */
|
|
|
|
ACPI_FREE(gpe_event_info->dispatch.handler);
|
|
gpe_event_info->dispatch.handler = NULL;
|
|
gpe_event_info->flags &=
|
|
~ACPI_GPE_DISPATCH_MASK;
|
|
} else if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags)
|
|
== ACPI_GPE_DISPATCH_NOTIFY) {
|
|
|
|
/* Delete the implicit notification device list */
|
|
|
|
notify = gpe_event_info->dispatch.notify_list;
|
|
while (notify) {
|
|
next = notify->next;
|
|
ACPI_FREE(notify);
|
|
notify = next;
|
|
}
|
|
|
|
gpe_event_info->dispatch.notify_list = NULL;
|
|
gpe_event_info->flags &=
|
|
~ACPI_GPE_DISPATCH_MASK;
|
|
}
|
|
}
|
|
}
|
|
|
|
return_ACPI_STATUS(AE_OK);
|
|
}
|
|
|
|
#endif /* !ACPI_REDUCED_HARDWARE */
|