The global event handler is called whenever a general purpose
or fixed ACPI event occurs.
Signed-off-by: Lin Ming <ming.m.lin@xxxxxxxxx>
---
drivers/acpi/acpica/acglobal.h | 5 ++++
drivers/acpi/acpica/evevent.c | 12 ++++++++-
drivers/acpi/acpica/evgpe.c | 9 ++++++-
drivers/acpi/acpica/evxface.c | 51 ++++++++++++++++++++++++++++++++++++++++
drivers/acpi/acpica/utglobal.c | 1 +
drivers/acpi/sysfs.c | 19 +++++++++++++-
include/acpi/acpixf.h | 4 +++
include/acpi/actypes.h | 8 ++++++
8 files changed, 104 insertions(+), 5 deletions(-)
diff --git a/drivers/acpi/acpica/acglobal.h b/drivers/acpi/acpica/acglobal.h
index fc69464..9bb69c5 100644
--- a/drivers/acpi/acpica/acglobal.h
+++ b/drivers/acpi/acpica/acglobal.h
@@ -146,6 +146,9 @@ u8 acpi_gbl_system_awake_and_running;
extern u32 acpi_gbl_nesting_level;
+ACPI_EXTERN u32 acpi_gpe_count;
+ACPI_EXTERN u32 acpi_fixed_event_count[ACPI_NUM_FIXED_EVENTS];
+
/* Support for dynamic control method tracing mechanism */
ACPI_EXTERN u32 acpi_gbl_original_dbg_level;
@@ -371,6 +374,8 @@ ACPI_EXTERN struct acpi_gpe_xrupt_info *acpi_gbl_gpe_xrupt_list_head;
ACPI_EXTERN struct acpi_gpe_block_info
*acpi_gbl_gpe_fadt_blocks[ACPI_MAX_GPE_BLOCKS];
ACPI_EXTERN u8 acpi_gbl_all_gpes_initialized;
+ACPI_EXTERN ACPI_GBL_EVENT_HANDLER acpi_gbl_global_event_handler;
+ACPI_EXTERN void *acpi_gbl_global_event_handler_context;
/*****************************************************************************
*
diff --git a/drivers/acpi/acpica/evevent.c b/drivers/acpi/acpica/evevent.c
index c61c303..e5e313c 100644
--- a/drivers/acpi/acpica/evevent.c
+++ b/drivers/acpi/acpica/evevent.c
@@ -217,9 +217,17 @@ u32 acpi_ev_fixed_event_detect(void)
status_bit_mask)
&& (fixed_enable & acpi_gbl_fixed_event_info[i].
enable_bit_mask)) {
+ /*
+ * Found an active (signalled) event. Invoke global event
+ * handler if present.
+ */
+ acpi_fixed_event_count[i]++;
+ if (acpi_gbl_global_event_handler) {
+ acpi_gbl_global_event_handler
+ (ACPI_EVENT_TYPE_FIXED, NULL, i,
+ acpi_gbl_global_event_handler_context);
+ }
- /* Found an active (signalled) event */
- acpi_os_fixed_event_count(i);
int_status |= acpi_ev_fixed_event_dispatch(i);
}
}
diff --git a/drivers/acpi/acpica/evgpe.c b/drivers/acpi/acpica/evgpe.c
index 56a7805..c9d9ecf 100644
--- a/drivers/acpi/acpica/evgpe.c
+++ b/drivers/acpi/acpica/evgpe.c
@@ -641,7 +641,14 @@ acpi_ev_gpe_dispatch(struct acpi_namespace_node *gpe_device,
ACPI_FUNCTION_TRACE(ev_gpe_dispatch);
- acpi_os_gpe_count(gpe_number);
+ /* 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);
+ }
/*
* If edge-triggered, clear the GPE status bit now. Note that
diff --git a/drivers/acpi/acpica/evxface.c b/drivers/acpi/acpica/evxface.c
index d193b90..1226689 100644
--- a/drivers/acpi/acpica/evxface.c
+++ b/drivers/acpi/acpica/evxface.c
@@ -92,6 +92,57 @@ acpi_status acpi_install_exception_handler(acpi_exception_handler handler)
ACPI_EXPORT_SYMBOL(acpi_install_exception_handler)
#endif /* ACPI_FUTURE_USAGE */
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_install_global_event_handler
+ *
+ * PARAMETERS: Handler - Pointer to the global event handler function
+ * Context - Value passed to the handler on each event
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Saves the pointer to the handler function. The global handler
+ * is invoked upon each incoming GPE and Fixed Event. It is
+ * invoked at interrupt level at the time of the event dispatch.
+ * Can be used to update event counters, etc.
+ *
+ ******************************************************************************/
+acpi_status
+acpi_install_global_event_handler(ACPI_GBL_EVENT_HANDLER handler, void *context)
+{
+ acpi_status status;
+
+ ACPI_FUNCTION_TRACE(acpi_install_global_event_handler);
+
+ /* Parameter validation */
+
+ if (!handler) {
+ return_ACPI_STATUS(AE_BAD_PARAMETER);
+ }
+
+ status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ /* Don't allow two handlers. */
+
+ if (acpi_gbl_global_event_handler) {
+ status = AE_ALREADY_EXISTS;
+ goto cleanup;
+ }
+
+ acpi_gbl_global_event_handler = handler;
+ acpi_gbl_global_event_handler_context = context;
+
+ cleanup:
+ (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
+ return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_install_global_event_handler)
+
/*******************************************************************************
*
* FUNCTION: acpi_install_fixed_event_handler
diff --git a/drivers/acpi/acpica/utglobal.c b/drivers/acpi/acpica/utglobal.c
index a99c32a..508537f 100644
--- a/drivers/acpi/acpica/utglobal.c
+++ b/drivers/acpi/acpica/utglobal.c
@@ -778,6 +778,7 @@ acpi_status acpi_ut_init_globals(void)
acpi_gbl_init_handler = NULL;
acpi_gbl_table_handler = NULL;
acpi_gbl_interface_handler = NULL;
+ acpi_gbl_global_event_handler = NULL;
/* Global Lock support */
diff --git a/drivers/acpi/sysfs.c b/drivers/acpi/sysfs.c
index f8588f8..61891e7 100644
--- a/drivers/acpi/sysfs.c
+++ b/drivers/acpi/sysfs.c
@@ -438,7 +438,7 @@ static void delete_gpe_attr_array(void)
return;
}
-void acpi_os_gpe_count(u32 gpe_number)
+static void gpe_count(u32 gpe_number)
{
acpi_gpe_count++;
@@ -454,7 +454,7 @@ void acpi_os_gpe_count(u32 gpe_number)
return;
}
-void acpi_os_fixed_event_count(u32 event_number)
+static void fixed_event_count(u32 event_number)
{
if (!all_counters)
return;
@@ -468,6 +468,16 @@ void acpi_os_fixed_event_count(u32 event_number)
return;
}
+static void acpi_gbl_event_handler(u32 event_type, acpi_handle device,
+ u32 event_number, void *context)
+{
+ if (event_type == ACPI_EVENT_TYPE_GPE)
+ gpe_count(event_number);
+
+ if (event_type == ACPI_EVENT_TYPE_FIXED)
+ fixed_event_count(event_number);
+}
+
static int get_status(u32 index, acpi_event_status *status,
acpi_handle *handle)
{
@@ -601,6 +611,7 @@ end:
void acpi_irq_stats_init(void)
{
+ acpi_status status;
int i;
if (all_counters)
@@ -619,6 +630,10 @@ void acpi_irq_stats_init(void)
if (all_counters == NULL)
goto fail;
+ status = acpi_install_global_event_handler(acpi_gbl_event_handler, NULL);
+ if (ACPI_FAILURE(status))
+ goto fail;
+
counter_attrs = kzalloc(sizeof(struct kobj_attribute) * (num_counters),
GFP_KERNEL);
if (counter_attrs == NULL)
diff --git a/include/acpi/acpixf.h b/include/acpi/acpixf.h
index 9de6a17..e8142d5 100644
--- a/include/acpi/acpixf.h
+++ b/include/acpi/acpixf.h
@@ -229,6 +229,10 @@ acpi_status
acpi_install_initialization_handler(acpi_init_handler handler, u32 function);
acpi_status
+acpi_install_global_event_handler(ACPI_GBL_EVENT_HANDLER handler,
+ void *context);
+
+acpi_status
acpi_install_fixed_event_handler(u32 acpi_event,
acpi_event_handler handler, void *context);
diff --git a/include/acpi/actypes.h b/include/acpi/actypes.h
index d7274ee..939a431 100644
--- a/include/acpi/actypes.h
+++ b/include/acpi/actypes.h
@@ -895,6 +895,14 @@ typedef void
/*
* Various handlers and callback procedures
*/
+typedef
+void (*ACPI_GBL_EVENT_HANDLER) (u32 event_type,
+ acpi_handle device,
+ u32 event_number, void *context);
+
+#define ACPI_EVENT_TYPE_GPE 0
+#define ACPI_EVENT_TYPE_FIXED 1
+
typedef u32(*acpi_event_handler) (void *context);
typedef
--
1.5.3
--
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