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-rw-r--r--drivers/acpi/acpica/acevents.h4
-rw-r--r--drivers/acpi/acpica/evgpe.c233
2 files changed, 132 insertions, 105 deletions
diff --git a/drivers/acpi/acpica/acevents.h b/drivers/acpi/acpica/acevents.h
index 1b0269f6ac2d..fa68544c7c07 100644
--- a/drivers/acpi/acpica/acevents.h
+++ b/drivers/acpi/acpica/acevents.h
@@ -103,6 +103,10 @@ struct acpi_gpe_event_info *acpi_ev_low_get_gpe_info(u32 gpe_number,
acpi_status acpi_ev_finish_gpe(struct acpi_gpe_event_info *gpe_event_info);
+u32
+acpi_ev_detect_gpe(struct acpi_namespace_node *gpe_device,
+ struct acpi_gpe_event_info *gpe_event_info, u32 gpe_number);
+
/*
* evgpeblk - Upper-level GPE block support
*/
diff --git a/drivers/acpi/acpica/evgpe.c b/drivers/acpi/acpica/evgpe.c
index 6d5f6e4fe3ac..07d4a15f39e7 100644
--- a/drivers/acpi/acpica/evgpe.c
+++ b/drivers/acpi/acpica/evgpe.c
@@ -374,17 +374,12 @@ struct acpi_gpe_event_info *acpi_ev_get_gpe_event_info(acpi_handle gpe_device,
u32 acpi_ev_gpe_detect(struct acpi_gpe_xrupt_info *gpe_xrupt_list)
{
- acpi_status status;
struct acpi_gpe_block_info *gpe_block;
struct acpi_namespace_node *gpe_device;
struct acpi_gpe_register_info *gpe_register_info;
struct acpi_gpe_event_info *gpe_event_info;
u32 gpe_number;
- struct acpi_gpe_handler_info *gpe_handler_info;
u32 int_status = ACPI_INTERRUPT_NOT_HANDLED;
- u8 enabled_status_byte;
- u64 status_reg;
- u64 enable_reg;
acpi_cpu_flags flags;
u32 i;
u32 j;
@@ -441,49 +436,11 @@ u32 acpi_ev_gpe_detect(struct acpi_gpe_xrupt_info *gpe_xrupt_list)
continue;
}
- /* Read the Status Register */
-
- status =
- acpi_hw_read(&status_reg,
- &gpe_register_info->status_address);
- if (ACPI_FAILURE(status)) {
- goto unlock_and_exit;
- }
-
- /* Read the Enable Register */
-
- status =
- acpi_hw_read(&enable_reg,
- &gpe_register_info->enable_address);
- if (ACPI_FAILURE(status)) {
- goto unlock_and_exit;
- }
-
- ACPI_DEBUG_PRINT((ACPI_DB_INTERRUPTS,
- "Read registers for GPE %02X-%02X: Status=%02X, Enable=%02X, "
- "RunEnable=%02X, WakeEnable=%02X\n",
- gpe_register_info->base_gpe_number,
- gpe_register_info->base_gpe_number +
- (ACPI_GPE_REGISTER_WIDTH - 1),
- (u32)status_reg, (u32)enable_reg,
- gpe_register_info->enable_for_run,
- gpe_register_info->enable_for_wake));
-
- /* Check if there is anything active at all in this register */
-
- enabled_status_byte = (u8)(status_reg & enable_reg);
- if (!enabled_status_byte) {
-
- /* No active GPEs in this register, move on */
-
- continue;
- }
-
/* Now look at the individual GPEs in this byte register */
for (j = 0; j < ACPI_GPE_REGISTER_WIDTH; j++) {
- /* Examine one GPE bit */
+ /* Detect and dispatch one GPE bit */
gpe_event_info =
&gpe_block->
@@ -491,71 +448,18 @@ u32 acpi_ev_gpe_detect(struct acpi_gpe_xrupt_info *gpe_xrupt_list)
ACPI_GPE_REGISTER_WIDTH) + j];
gpe_number =
j + gpe_register_info->base_gpe_number;
-
- if (enabled_status_byte & (1 << j)) {
-
- /* 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);
- }
- }
+ acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
+ int_status |=
+ acpi_ev_detect_gpe(gpe_device,
+ gpe_event_info,
+ gpe_number);
+ flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
}
}
gpe_block = gpe_block->next;
}
-unlock_and_exit:
-
acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
return (int_status);
}
@@ -728,6 +632,127 @@ acpi_status acpi_ev_finish_gpe(struct acpi_gpe_event_info *gpe_event_info)
/*******************************************************************************
*
+ * 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);
+
+ /* 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_read(&enable_reg, &gpe_register_info->enable_address);
+ if (ACPI_FAILURE(status)) {
+ goto error_exit;
+ }
+
+ /* GPE currently active (status bit == 1)? */
+
+ status = acpi_hw_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
@@ -739,8 +764,6 @@ acpi_status acpi_ev_finish_gpe(struct acpi_gpe_event_info *gpe_event_info)
* DESCRIPTION: Dispatch a General Purpose Event to either a function (e.g. EC)
* or method (e.g. _Lxx/_Exx) handler.
*
- * This function executes at interrupt level.
- *
******************************************************************************/
u32
generated by cgit (git 2.34.1) at 2025-11-04 00:36:51 +0000