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Diffstat (limited to 'drivers/acpi/acpica/hwgpe.c')
-rw-r--r--drivers/acpi/acpica/hwgpe.c340
1 files changed, 270 insertions, 70 deletions
diff --git a/drivers/acpi/acpica/hwgpe.c b/drivers/acpi/acpica/hwgpe.c
index 96540506058f..386f4759c317 100644
--- a/drivers/acpi/acpica/hwgpe.c
+++ b/drivers/acpi/acpica/hwgpe.c
@@ -1,46 +1,12 @@
+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
/******************************************************************************
*
* Module Name: hwgpe - Low level GPE enable/disable/clear functions
*
+ * Copyright (C) 2000 - 2025, Intel Corp.
+ *
*****************************************************************************/
-/*
- * Copyright (C) 2000 - 2013, Intel Corp.
- * All rights reserved.
- *
- * Redistribution and use in source and binary forms, with or without
- * modification, are permitted provided that the following conditions
- * are met:
- * 1. Redistributions of source code must retain the above copyright
- * notice, this list of conditions, and the following disclaimer,
- * without modification.
- * 2. Redistributions in binary form must reproduce at minimum a disclaimer
- * substantially similar to the "NO WARRANTY" disclaimer below
- * ("Disclaimer") and any redistribution must be conditioned upon
- * including a substantially similar Disclaimer requirement for further
- * binary redistribution.
- * 3. Neither the names of the above-listed copyright holders nor the names
- * of any contributors may be used to endorse or promote products derived
- * from this software without specific prior written permission.
- *
- * Alternatively, this software may be distributed under the terms of the
- * GNU General Public License ("GPL") version 2 as published by the Free
- * Software Foundation.
- *
- * NO WARRANTY
- * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
- * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
- * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
- * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
- * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
- * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
- * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
- * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
- * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
- * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
- * POSSIBILITY OF SUCH DAMAGES.
- */
-
#include <acpi/acpi.h>
#include "accommon.h"
#include "acevents.h"
@@ -54,6 +20,80 @@ 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_gpe_read
+ *
+ * PARAMETERS: value - Where the value is returned
+ * reg - GPE register structure
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Read from a GPE register in either memory or IO space.
+ *
+ * LIMITATIONS: <These limitations also apply to acpi_hw_gpe_write>
+ * space_ID must be system_memory or system_IO.
+ *
+ ******************************************************************************/
+
+acpi_status acpi_hw_gpe_read(u64 *value, struct acpi_gpe_address *reg)
+{
+ acpi_status status;
+ u32 value32;
+
+ if (reg->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
+#ifdef ACPI_GPE_USE_LOGICAL_ADDRESSES
+ *value = (u64)ACPI_GET8((unsigned long)reg->address);
+ return_ACPI_STATUS(AE_OK);
+#else
+ return acpi_os_read_memory((acpi_physical_address)reg->address,
+ value, ACPI_GPE_REGISTER_WIDTH);
+#endif
+ }
+
+ status = acpi_os_read_port((acpi_io_address)reg->address,
+ &value32, ACPI_GPE_REGISTER_WIDTH);
+ if (ACPI_FAILURE(status))
+ return_ACPI_STATUS(status);
+
+ *value = (u64)value32;
+
+ return_ACPI_STATUS(AE_OK);
+}
+
+/******************************************************************************
+ *
+ * FUNCTION: acpi_hw_gpe_write
+ *
+ * PARAMETERS: value - Value to be written
+ * reg - GPE register structure
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Write to a GPE register in either memory or IO space.
+ *
+ ******************************************************************************/
+
+acpi_status acpi_hw_gpe_write(u64 value, struct acpi_gpe_address *reg)
+{
+ if (reg->space_id == ACPI_ADR_SPACE_SYSTEM_MEMORY) {
+#ifdef ACPI_GPE_USE_LOGICAL_ADDRESSES
+ ACPI_SET8((unsigned long)reg->address, value);
+ return_ACPI_STATUS(AE_OK);
+#else
+ return acpi_os_write_memory((acpi_physical_address)reg->address,
+ value, ACPI_GPE_REGISTER_WIDTH);
+#endif
+ }
+
+ return acpi_os_write_port((acpi_io_address)reg->address, (u32)value,
+ ACPI_GPE_REGISTER_WIDTH);
+}
+
/******************************************************************************
*
* FUNCTION: acpi_hw_get_gpe_register_bit
@@ -85,6 +125,8 @@ u32 acpi_hw_get_gpe_register_bit(struct acpi_gpe_event_info *gpe_event_info)
* 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.
*
******************************************************************************/
@@ -92,8 +134,8 @@ 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;
- u32 enable_mask;
+ acpi_status status = AE_OK;
+ u64 enable_mask;
u32 register_bit;
ACPI_FUNCTION_ENTRY();
@@ -107,7 +149,8 @@ acpi_hw_low_set_gpe(struct acpi_gpe_event_info *gpe_event_info, u32 action)
/* Get current value of the enable register that contains this GPE */
- status = acpi_hw_read(&enable_mask, &gpe_register_info->enable_address);
+ status = acpi_hw_gpe_read(&enable_mask,
+ &gpe_register_info->enable_address);
if (ACPI_FAILURE(status)) {
return (status);
}
@@ -118,13 +161,13 @@ acpi_hw_low_set_gpe(struct acpi_gpe_event_info *gpe_event_info, u32 action)
switch (action) {
case ACPI_GPE_CONDITIONAL_ENABLE:
- /* Only enable if the enable_for_run bit is set */
+ /* Only enable if the corresponding enable_mask bit is set */
- if (!(register_bit & gpe_register_info->enable_for_run)) {
+ if (!(register_bit & gpe_register_info->enable_mask)) {
return (AE_BAD_PARAMETER);
}
- /*lint -fallthrough */
+ ACPI_FALLTHROUGH;
case ACPI_GPE_ENABLE:
@@ -142,9 +185,13 @@ acpi_hw_low_set_gpe(struct acpi_gpe_event_info *gpe_event_info, u32 action)
return (AE_BAD_PARAMETER);
}
- /* Write the updated enable mask */
+ 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);
+ status = acpi_hw_gpe_write(enable_mask,
+ &gpe_register_info->enable_address);
+ }
return (status);
}
@@ -160,7 +207,7 @@ acpi_hw_low_set_gpe(struct acpi_gpe_event_info *gpe_event_info, u32 action)
*
******************************************************************************/
-acpi_status acpi_hw_clear_gpe(struct acpi_gpe_event_info * gpe_event_info)
+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;
@@ -181,9 +228,8 @@ acpi_status acpi_hw_clear_gpe(struct acpi_gpe_event_info * gpe_event_info)
*/
register_bit = acpi_hw_get_gpe_register_bit(gpe_event_info);
- status = acpi_hw_write(register_bit,
- &gpe_register_info->status_address);
-
+ status = acpi_hw_gpe_write(register_bit,
+ &gpe_register_info->status_address);
return (status);
}
@@ -201,10 +247,10 @@ acpi_status acpi_hw_clear_gpe(struct acpi_gpe_event_info * gpe_event_info)
******************************************************************************/
acpi_status
-acpi_hw_get_gpe_status(struct acpi_gpe_event_info * gpe_event_info,
- acpi_event_status * event_status)
+acpi_hw_get_gpe_status(struct acpi_gpe_event_info *gpe_event_info,
+ acpi_event_status *event_status)
{
- u32 in_byte;
+ u64 in_byte;
u32 register_bit;
struct acpi_gpe_register_info *gpe_register_info;
acpi_event_status local_event_status = 0;
@@ -216,6 +262,13 @@ acpi_hw_get_gpe_status(struct acpi_gpe_event_info * gpe_event_info,
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;
@@ -230,21 +283,38 @@ acpi_hw_get_gpe_status(struct acpi_gpe_event_info * gpe_event_info,
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_gpe_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);
+ status = acpi_hw_gpe_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_SET;
+ local_event_status |= ACPI_EVENT_FLAG_STATUS_SET;
}
/* Set return value */
@@ -255,6 +325,32 @@ acpi_hw_get_gpe_status(struct acpi_gpe_event_info * gpe_event_info,
/******************************************************************************
*
+ * 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_gpe_write(enable_mask,
+ &gpe_register_info->enable_address);
+ return (status);
+}
+
+/******************************************************************************
+ *
* FUNCTION: acpi_hw_disable_gpe_block
*
* PARAMETERS: gpe_xrupt_info - GPE Interrupt info
@@ -280,8 +376,8 @@ acpi_hw_disable_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
/* Disable all GPEs in this register */
status =
- acpi_hw_write(0x00,
- &gpe_block->register_info[i].enable_address);
+ acpi_hw_gpe_enable_write(0x00,
+ &gpe_block->register_info[i]);
if (ACPI_FAILURE(status)) {
return (status);
}
@@ -316,9 +412,8 @@ acpi_hw_clear_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
/* Clear status on all GPEs in this register */
- status =
- acpi_hw_write(0xFF,
- &gpe_block->register_info[i].status_address);
+ status = acpi_hw_gpe_write(0xFF,
+ &gpe_block->register_info[i].status_address);
if (ACPI_FAILURE(status)) {
return (status);
}
@@ -343,26 +438,30 @@ acpi_hw_clear_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
acpi_status
acpi_hw_enable_runtime_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
- struct acpi_gpe_block_info * gpe_block,
+ 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++) {
- if (!gpe_block->register_info[i].enable_for_run) {
+ 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_write(gpe_block->register_info[i].enable_for_run,
- &gpe_block->register_info[i].enable_address);
+ acpi_hw_gpe_enable_write(enable_mask, gpe_register_info);
if (ACPI_FAILURE(status)) {
return (status);
}
@@ -392,19 +491,21 @@ acpi_hw_enable_wakeup_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
{
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++) {
- if (!gpe_block->register_info[i].enable_for_wake) {
- continue;
- }
+ gpe_register_info = &gpe_block->register_info[i];
- /* Enable all "wake" GPEs in this register */
+ /*
+ * Enable all "wake" GPEs in this register and disable the
+ * remaining ones.
+ */
status =
- acpi_hw_write(gpe_block->register_info[i].enable_for_wake,
- &gpe_block->register_info[i].enable_address);
+ acpi_hw_gpe_enable_write(gpe_register_info->enable_for_wake,
+ gpe_register_info);
if (ACPI_FAILURE(status)) {
return (status);
}
@@ -413,6 +514,65 @@ acpi_hw_enable_wakeup_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
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_gpe_read(&in_enable,
+ &gpe_register_info->enable_address);
+ if (ACPI_FAILURE(status)) {
+ continue;
+ }
+
+ status = acpi_hw_gpe_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
@@ -432,7 +592,6 @@ acpi_status acpi_hw_disable_all_gpes(void)
ACPI_FUNCTION_TRACE(hw_disable_all_gpes);
status = acpi_ev_walk_gpe_list(acpi_hw_disable_gpe_block, NULL);
- status = acpi_ev_walk_gpe_list(acpi_hw_clear_gpe_block, NULL);
return_ACPI_STATUS(status);
}
@@ -480,4 +639,45 @@ acpi_status acpi_hw_enable_all_wakeup_gpes(void)
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 */
generated by cgit (git 2.34.1) at 2025-12-25 05:48:48 +0000