forked from luck/tmp_suning_uos_patched
0ce792d660
The check carried out by acpi_any_gpe_status_set() is not precise enough for the suspend-to-idle implementation in Linux and in some cases it is necessary make it skip one GPE (specifically, the EC GPE) from the check to prevent a race condition leading to a premature system resume from occurring. For this reason, redefine acpi_any_gpe_status_set() to take the number of a GPE to skip as an argument. Link: https://bugzilla.kernel.org/show_bug.cgi?id=206629 Tested-by: Ondřej Caletka <ondrej@caletka.cz> Cc: 5.4+ <stable@vger.kernel.org> # 5.4+ Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
614 lines
16 KiB
C
614 lines
16 KiB
C
// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
|
|
/******************************************************************************
|
|
*
|
|
* Module Name: hwgpe - Low level GPE enable/disable/clear functions
|
|
*
|
|
* Copyright (C) 2000 - 2020, Intel Corp.
|
|
*
|
|
*****************************************************************************/
|
|
|
|
#include <acpi/acpi.h>
|
|
#include "accommon.h"
|
|
#include "acevents.h"
|
|
|
|
#define _COMPONENT ACPI_HARDWARE
|
|
ACPI_MODULE_NAME("hwgpe")
|
|
#if (!ACPI_REDUCED_HARDWARE) /* Entire module */
|
|
/* Local prototypes */
|
|
static acpi_status
|
|
acpi_hw_enable_wakeup_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
|
|
struct acpi_gpe_block_info *gpe_block,
|
|
void *context);
|
|
|
|
static acpi_status
|
|
acpi_hw_gpe_enable_write(u8 enable_mask,
|
|
struct acpi_gpe_register_info *gpe_register_info);
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_hw_get_gpe_register_bit
|
|
*
|
|
* PARAMETERS: gpe_event_info - Info block for the GPE
|
|
*
|
|
* RETURN: Register mask with a one in the GPE bit position
|
|
*
|
|
* DESCRIPTION: Compute the register mask for this GPE. One bit is set in the
|
|
* correct position for the input GPE.
|
|
*
|
|
******************************************************************************/
|
|
|
|
u32 acpi_hw_get_gpe_register_bit(struct acpi_gpe_event_info *gpe_event_info)
|
|
{
|
|
|
|
return ((u32)1 <<
|
|
(gpe_event_info->gpe_number -
|
|
gpe_event_info->register_info->base_gpe_number));
|
|
}
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_hw_low_set_gpe
|
|
*
|
|
* PARAMETERS: gpe_event_info - Info block for the GPE to be disabled
|
|
* action - Enable or disable
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Enable or disable a single GPE in the parent enable register.
|
|
* The enable_mask field of the involved GPE register must be
|
|
* updated by the caller if necessary.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_hw_low_set_gpe(struct acpi_gpe_event_info *gpe_event_info, u32 action)
|
|
{
|
|
struct acpi_gpe_register_info *gpe_register_info;
|
|
acpi_status status = AE_OK;
|
|
u64 enable_mask;
|
|
u32 register_bit;
|
|
|
|
ACPI_FUNCTION_ENTRY();
|
|
|
|
/* Get the info block for the entire GPE register */
|
|
|
|
gpe_register_info = gpe_event_info->register_info;
|
|
if (!gpe_register_info) {
|
|
return (AE_NOT_EXIST);
|
|
}
|
|
|
|
/* Get current value of the enable register that contains this GPE */
|
|
|
|
status = acpi_hw_read(&enable_mask, &gpe_register_info->enable_address);
|
|
if (ACPI_FAILURE(status)) {
|
|
return (status);
|
|
}
|
|
|
|
/* Set or clear just the bit that corresponds to this GPE */
|
|
|
|
register_bit = acpi_hw_get_gpe_register_bit(gpe_event_info);
|
|
switch (action) {
|
|
case ACPI_GPE_CONDITIONAL_ENABLE:
|
|
|
|
/* Only enable if the corresponding enable_mask bit is set */
|
|
|
|
if (!(register_bit & gpe_register_info->enable_mask)) {
|
|
return (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/*lint -fallthrough */
|
|
|
|
case ACPI_GPE_ENABLE:
|
|
|
|
ACPI_SET_BIT(enable_mask, register_bit);
|
|
break;
|
|
|
|
case ACPI_GPE_DISABLE:
|
|
|
|
ACPI_CLEAR_BIT(enable_mask, register_bit);
|
|
break;
|
|
|
|
default:
|
|
|
|
ACPI_ERROR((AE_INFO, "Invalid GPE Action, %u", action));
|
|
return (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
if (!(register_bit & gpe_register_info->mask_for_run)) {
|
|
|
|
/* Write the updated enable mask */
|
|
|
|
status =
|
|
acpi_hw_write(enable_mask,
|
|
&gpe_register_info->enable_address);
|
|
}
|
|
return (status);
|
|
}
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_hw_clear_gpe
|
|
*
|
|
* PARAMETERS: gpe_event_info - Info block for the GPE to be cleared
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Clear the status bit for a single GPE.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status acpi_hw_clear_gpe(struct acpi_gpe_event_info *gpe_event_info)
|
|
{
|
|
struct acpi_gpe_register_info *gpe_register_info;
|
|
acpi_status status;
|
|
u32 register_bit;
|
|
|
|
ACPI_FUNCTION_ENTRY();
|
|
|
|
/* Get the info block for the entire GPE register */
|
|
|
|
gpe_register_info = gpe_event_info->register_info;
|
|
if (!gpe_register_info) {
|
|
return (AE_NOT_EXIST);
|
|
}
|
|
|
|
/*
|
|
* Write a one to the appropriate bit in the status register to
|
|
* clear this GPE.
|
|
*/
|
|
register_bit = acpi_hw_get_gpe_register_bit(gpe_event_info);
|
|
|
|
status =
|
|
acpi_hw_write(register_bit, &gpe_register_info->status_address);
|
|
return (status);
|
|
}
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_hw_get_gpe_status
|
|
*
|
|
* PARAMETERS: gpe_event_info - Info block for the GPE to queried
|
|
* event_status - Where the GPE status is returned
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Return the status of a single GPE.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_hw_get_gpe_status(struct acpi_gpe_event_info *gpe_event_info,
|
|
acpi_event_status *event_status)
|
|
{
|
|
u64 in_byte;
|
|
u32 register_bit;
|
|
struct acpi_gpe_register_info *gpe_register_info;
|
|
acpi_event_status local_event_status = 0;
|
|
acpi_status status;
|
|
|
|
ACPI_FUNCTION_ENTRY();
|
|
|
|
if (!event_status) {
|
|
return (AE_BAD_PARAMETER);
|
|
}
|
|
|
|
/* GPE currently handled? */
|
|
|
|
if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) !=
|
|
ACPI_GPE_DISPATCH_NONE) {
|
|
local_event_status |= ACPI_EVENT_FLAG_HAS_HANDLER;
|
|
}
|
|
|
|
/* 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? (enabled for runtime?) */
|
|
|
|
if (register_bit & gpe_register_info->enable_for_run) {
|
|
local_event_status |= ACPI_EVENT_FLAG_ENABLED;
|
|
}
|
|
|
|
/* GPE currently masked? (masked for runtime?) */
|
|
|
|
if (register_bit & gpe_register_info->mask_for_run) {
|
|
local_event_status |= ACPI_EVENT_FLAG_MASKED;
|
|
}
|
|
|
|
/* GPE enabled for wake? */
|
|
|
|
if (register_bit & gpe_register_info->enable_for_wake) {
|
|
local_event_status |= ACPI_EVENT_FLAG_WAKE_ENABLED;
|
|
}
|
|
|
|
/* GPE currently enabled (enable bit == 1)? */
|
|
|
|
status = acpi_hw_read(&in_byte, &gpe_register_info->enable_address);
|
|
if (ACPI_FAILURE(status)) {
|
|
return (status);
|
|
}
|
|
|
|
if (register_bit & in_byte) {
|
|
local_event_status |= ACPI_EVENT_FLAG_ENABLE_SET;
|
|
}
|
|
|
|
/* GPE currently active (status bit == 1)? */
|
|
|
|
status = acpi_hw_read(&in_byte, &gpe_register_info->status_address);
|
|
if (ACPI_FAILURE(status)) {
|
|
return (status);
|
|
}
|
|
|
|
if (register_bit & in_byte) {
|
|
local_event_status |= ACPI_EVENT_FLAG_STATUS_SET;
|
|
}
|
|
|
|
/* Set return value */
|
|
|
|
(*event_status) = local_event_status;
|
|
return (AE_OK);
|
|
}
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_hw_gpe_enable_write
|
|
*
|
|
* PARAMETERS: enable_mask - Bit mask to write to the GPE register
|
|
* gpe_register_info - Gpe Register info
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Write the enable mask byte to the given GPE register.
|
|
*
|
|
******************************************************************************/
|
|
|
|
static acpi_status
|
|
acpi_hw_gpe_enable_write(u8 enable_mask,
|
|
struct acpi_gpe_register_info *gpe_register_info)
|
|
{
|
|
acpi_status status;
|
|
|
|
gpe_register_info->enable_mask = enable_mask;
|
|
|
|
status = acpi_hw_write(enable_mask, &gpe_register_info->enable_address);
|
|
return (status);
|
|
}
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_hw_disable_gpe_block
|
|
*
|
|
* PARAMETERS: gpe_xrupt_info - GPE Interrupt info
|
|
* gpe_block - Gpe Block info
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Disable all GPEs within a single GPE block
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_hw_disable_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
|
|
struct acpi_gpe_block_info *gpe_block, void *context)
|
|
{
|
|
u32 i;
|
|
acpi_status status;
|
|
|
|
/* Examine each GPE Register within the block */
|
|
|
|
for (i = 0; i < gpe_block->register_count; i++) {
|
|
|
|
/* Disable all GPEs in this register */
|
|
|
|
status =
|
|
acpi_hw_gpe_enable_write(0x00,
|
|
&gpe_block->register_info[i]);
|
|
if (ACPI_FAILURE(status)) {
|
|
return (status);
|
|
}
|
|
}
|
|
|
|
return (AE_OK);
|
|
}
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_hw_clear_gpe_block
|
|
*
|
|
* PARAMETERS: gpe_xrupt_info - GPE Interrupt info
|
|
* gpe_block - Gpe Block info
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Clear status bits for all GPEs within a single GPE block
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_hw_clear_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
|
|
struct acpi_gpe_block_info *gpe_block, void *context)
|
|
{
|
|
u32 i;
|
|
acpi_status status;
|
|
|
|
/* Examine each GPE Register within the block */
|
|
|
|
for (i = 0; i < gpe_block->register_count; i++) {
|
|
|
|
/* Clear status on all GPEs in this register */
|
|
|
|
status =
|
|
acpi_hw_write(0xFF,
|
|
&gpe_block->register_info[i].status_address);
|
|
if (ACPI_FAILURE(status)) {
|
|
return (status);
|
|
}
|
|
}
|
|
|
|
return (AE_OK);
|
|
}
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_hw_enable_runtime_gpe_block
|
|
*
|
|
* PARAMETERS: gpe_xrupt_info - GPE Interrupt info
|
|
* gpe_block - Gpe Block info
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Enable all "runtime" GPEs within a single GPE block. Includes
|
|
* combination wake/run GPEs.
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status
|
|
acpi_hw_enable_runtime_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
|
|
struct acpi_gpe_block_info *gpe_block,
|
|
void *context)
|
|
{
|
|
u32 i;
|
|
acpi_status status;
|
|
struct acpi_gpe_register_info *gpe_register_info;
|
|
u8 enable_mask;
|
|
|
|
/* NOTE: assumes that all GPEs are currently disabled */
|
|
|
|
/* Examine each GPE Register within the block */
|
|
|
|
for (i = 0; i < gpe_block->register_count; i++) {
|
|
gpe_register_info = &gpe_block->register_info[i];
|
|
if (!gpe_register_info->enable_for_run) {
|
|
continue;
|
|
}
|
|
|
|
/* Enable all "runtime" GPEs in this register */
|
|
|
|
enable_mask = gpe_register_info->enable_for_run &
|
|
~gpe_register_info->mask_for_run;
|
|
status =
|
|
acpi_hw_gpe_enable_write(enable_mask, gpe_register_info);
|
|
if (ACPI_FAILURE(status)) {
|
|
return (status);
|
|
}
|
|
}
|
|
|
|
return (AE_OK);
|
|
}
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_hw_enable_wakeup_gpe_block
|
|
*
|
|
* PARAMETERS: gpe_xrupt_info - GPE Interrupt info
|
|
* gpe_block - Gpe Block info
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Enable all "wake" GPEs within a single GPE block. Includes
|
|
* combination wake/run GPEs.
|
|
*
|
|
******************************************************************************/
|
|
|
|
static acpi_status
|
|
acpi_hw_enable_wakeup_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
|
|
struct acpi_gpe_block_info *gpe_block,
|
|
void *context)
|
|
{
|
|
u32 i;
|
|
acpi_status status;
|
|
struct acpi_gpe_register_info *gpe_register_info;
|
|
|
|
/* Examine each GPE Register within the block */
|
|
|
|
for (i = 0; i < gpe_block->register_count; i++) {
|
|
gpe_register_info = &gpe_block->register_info[i];
|
|
|
|
/*
|
|
* Enable all "wake" GPEs in this register and disable the
|
|
* remaining ones.
|
|
*/
|
|
|
|
status =
|
|
acpi_hw_gpe_enable_write(gpe_register_info->enable_for_wake,
|
|
gpe_register_info);
|
|
if (ACPI_FAILURE(status)) {
|
|
return (status);
|
|
}
|
|
}
|
|
|
|
return (AE_OK);
|
|
}
|
|
|
|
struct acpi_gpe_block_status_context {
|
|
struct acpi_gpe_register_info *gpe_skip_register_info;
|
|
u8 gpe_skip_mask;
|
|
u8 retval;
|
|
};
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_hw_get_gpe_block_status
|
|
*
|
|
* PARAMETERS: gpe_xrupt_info - GPE Interrupt info
|
|
* gpe_block - Gpe Block info
|
|
* context - GPE list walk context data
|
|
*
|
|
* RETURN: Success
|
|
*
|
|
* DESCRIPTION: Produce a combined GPE status bits mask for the given block.
|
|
*
|
|
******************************************************************************/
|
|
|
|
static acpi_status
|
|
acpi_hw_get_gpe_block_status(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
|
|
struct acpi_gpe_block_info *gpe_block,
|
|
void *context)
|
|
{
|
|
struct acpi_gpe_block_status_context *c = context;
|
|
struct acpi_gpe_register_info *gpe_register_info;
|
|
u64 in_enable, in_status;
|
|
acpi_status status;
|
|
u8 ret_mask;
|
|
u32 i;
|
|
|
|
/* Examine each GPE Register within the block */
|
|
|
|
for (i = 0; i < gpe_block->register_count; i++) {
|
|
gpe_register_info = &gpe_block->register_info[i];
|
|
|
|
status = acpi_hw_read(&in_enable,
|
|
&gpe_register_info->enable_address);
|
|
if (ACPI_FAILURE(status)) {
|
|
continue;
|
|
}
|
|
|
|
status = acpi_hw_read(&in_status,
|
|
&gpe_register_info->status_address);
|
|
if (ACPI_FAILURE(status)) {
|
|
continue;
|
|
}
|
|
|
|
ret_mask = in_enable & in_status;
|
|
if (ret_mask && c->gpe_skip_register_info == gpe_register_info) {
|
|
ret_mask &= ~c->gpe_skip_mask;
|
|
}
|
|
c->retval |= ret_mask;
|
|
}
|
|
|
|
return (AE_OK);
|
|
}
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_hw_disable_all_gpes
|
|
*
|
|
* PARAMETERS: None
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Disable and clear all GPEs in all GPE blocks
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status acpi_hw_disable_all_gpes(void)
|
|
{
|
|
acpi_status status;
|
|
|
|
ACPI_FUNCTION_TRACE(hw_disable_all_gpes);
|
|
|
|
status = acpi_ev_walk_gpe_list(acpi_hw_disable_gpe_block, NULL);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_hw_enable_all_runtime_gpes
|
|
*
|
|
* PARAMETERS: None
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Enable all "runtime" GPEs, in all GPE blocks
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status acpi_hw_enable_all_runtime_gpes(void)
|
|
{
|
|
acpi_status status;
|
|
|
|
ACPI_FUNCTION_TRACE(hw_enable_all_runtime_gpes);
|
|
|
|
status = acpi_ev_walk_gpe_list(acpi_hw_enable_runtime_gpe_block, NULL);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_hw_enable_all_wakeup_gpes
|
|
*
|
|
* PARAMETERS: None
|
|
*
|
|
* RETURN: Status
|
|
*
|
|
* DESCRIPTION: Enable all "wakeup" GPEs, in all GPE blocks
|
|
*
|
|
******************************************************************************/
|
|
|
|
acpi_status acpi_hw_enable_all_wakeup_gpes(void)
|
|
{
|
|
acpi_status status;
|
|
|
|
ACPI_FUNCTION_TRACE(hw_enable_all_wakeup_gpes);
|
|
|
|
status = acpi_ev_walk_gpe_list(acpi_hw_enable_wakeup_gpe_block, NULL);
|
|
return_ACPI_STATUS(status);
|
|
}
|
|
|
|
/******************************************************************************
|
|
*
|
|
* FUNCTION: acpi_hw_check_all_gpes
|
|
*
|
|
* PARAMETERS: gpe_skip_device - GPE devoce of the GPE to skip
|
|
* gpe_skip_number - Number of the GPE to skip
|
|
*
|
|
* RETURN: Combined status of all GPEs
|
|
*
|
|
* DESCRIPTION: Check all enabled GPEs in all GPE blocks, except for the one
|
|
* represented by the "skip" arguments, and return TRUE if the
|
|
* status bit is set for at least one of them of FALSE otherwise.
|
|
*
|
|
******************************************************************************/
|
|
|
|
u8 acpi_hw_check_all_gpes(acpi_handle gpe_skip_device, u32 gpe_skip_number)
|
|
{
|
|
struct acpi_gpe_block_status_context context = {
|
|
.gpe_skip_register_info = NULL,
|
|
.retval = 0,
|
|
};
|
|
struct acpi_gpe_event_info *gpe_event_info;
|
|
acpi_cpu_flags flags;
|
|
|
|
ACPI_FUNCTION_TRACE(acpi_hw_check_all_gpes);
|
|
|
|
flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
|
|
|
|
gpe_event_info = acpi_ev_get_gpe_event_info(gpe_skip_device,
|
|
gpe_skip_number);
|
|
if (gpe_event_info) {
|
|
context.gpe_skip_register_info = gpe_event_info->register_info;
|
|
context.gpe_skip_mask = acpi_hw_get_gpe_register_bit(gpe_event_info);
|
|
}
|
|
|
|
acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
|
|
|
|
(void)acpi_ev_walk_gpe_list(acpi_hw_get_gpe_block_status, &context);
|
|
return (context.retval != 0);
|
|
}
|
|
|
|
#endif /* !ACPI_REDUCED_HARDWARE */
|