summaryrefslogtreecommitdiffstats
path: root/drivers/acpi/acpica/evxface.c
diff options
context:
space:
mode:
Diffstat (limited to 'drivers/acpi/acpica/evxface.c')
-rw-r--r--drivers/acpi/acpica/evxface.c148
1 files changed, 144 insertions, 4 deletions
diff --git a/drivers/acpi/acpica/evxface.c b/drivers/acpi/acpica/evxface.c
index ca5fba9..23a7fad 100644
--- a/drivers/acpi/acpica/evxface.c
+++ b/drivers/acpi/acpica/evxface.c
@@ -41,7 +41,8 @@
* POSSIBILITY OF SUCH DAMAGES.
*/
-#include <linux/export.h>
+#define EXPORT_ACPI_INTERFACES
+
#include <acpi/acpi.h>
#include "accommon.h"
#include "acnamesp.h"
@@ -374,7 +375,7 @@ acpi_status acpi_install_exception_handler(acpi_exception_handler handler)
acpi_gbl_exception_handler = handler;
- cleanup:
+cleanup:
(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
return_ACPI_STATUS(status);
}
@@ -385,6 +386,144 @@ ACPI_EXPORT_SYMBOL(acpi_install_exception_handler)
#if (!ACPI_REDUCED_HARDWARE)
/*******************************************************************************
*
+ * FUNCTION: acpi_install_sci_handler
+ *
+ * PARAMETERS: address - Address of the handler
+ * context - Value passed to the handler on each SCI
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Install a handler for a System Control Interrupt.
+ *
+ ******************************************************************************/
+acpi_status acpi_install_sci_handler(acpi_sci_handler address, void *context)
+{
+ struct acpi_sci_handler_info *new_sci_handler;
+ struct acpi_sci_handler_info *sci_handler;
+ acpi_cpu_flags flags;
+ acpi_status status;
+
+ ACPI_FUNCTION_TRACE(acpi_install_sci_handler);
+
+ if (!address) {
+ return_ACPI_STATUS(AE_BAD_PARAMETER);
+ }
+
+ /* Allocate and init a handler object */
+
+ new_sci_handler = ACPI_ALLOCATE(sizeof(struct acpi_sci_handler_info));
+ if (!new_sci_handler) {
+ return_ACPI_STATUS(AE_NO_MEMORY);
+ }
+
+ new_sci_handler->address = address;
+ new_sci_handler->context = context;
+
+ status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
+ if (ACPI_FAILURE(status)) {
+ goto exit;
+ }
+
+ /* Lock list during installation */
+
+ flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
+ sci_handler = acpi_gbl_sci_handler_list;
+
+ /* Ensure handler does not already exist */
+
+ while (sci_handler) {
+ if (address == sci_handler->address) {
+ status = AE_ALREADY_EXISTS;
+ goto unlock_and_exit;
+ }
+
+ sci_handler = sci_handler->next;
+ }
+
+ /* Install the new handler into the global list (at head) */
+
+ new_sci_handler->next = acpi_gbl_sci_handler_list;
+ acpi_gbl_sci_handler_list = new_sci_handler;
+
+unlock_and_exit:
+
+ acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
+ (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
+
+exit:
+ if (ACPI_FAILURE(status)) {
+ ACPI_FREE(new_sci_handler);
+ }
+ return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
+ * FUNCTION: acpi_remove_sci_handler
+ *
+ * PARAMETERS: address - Address of the handler
+ *
+ * RETURN: Status
+ *
+ * DESCRIPTION: Remove a handler for a System Control Interrupt.
+ *
+ ******************************************************************************/
+
+acpi_status acpi_remove_sci_handler(acpi_sci_handler address)
+{
+ struct acpi_sci_handler_info *prev_sci_handler;
+ struct acpi_sci_handler_info *next_sci_handler;
+ acpi_cpu_flags flags;
+ acpi_status status;
+
+ ACPI_FUNCTION_TRACE(acpi_remove_sci_handler);
+
+ if (!address) {
+ return_ACPI_STATUS(AE_BAD_PARAMETER);
+ }
+
+ status = acpi_ut_acquire_mutex(ACPI_MTX_EVENTS);
+ if (ACPI_FAILURE(status)) {
+ return_ACPI_STATUS(status);
+ }
+
+ /* Remove the SCI handler with lock */
+
+ flags = acpi_os_acquire_lock(acpi_gbl_gpe_lock);
+
+ prev_sci_handler = NULL;
+ next_sci_handler = acpi_gbl_sci_handler_list;
+ while (next_sci_handler) {
+ if (next_sci_handler->address == address) {
+
+ /* Unlink and free the SCI handler info block */
+
+ if (prev_sci_handler) {
+ prev_sci_handler->next = next_sci_handler->next;
+ } else {
+ acpi_gbl_sci_handler_list =
+ next_sci_handler->next;
+ }
+
+ acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
+ ACPI_FREE(next_sci_handler);
+ goto unlock_and_exit;
+ }
+
+ prev_sci_handler = next_sci_handler;
+ next_sci_handler = next_sci_handler->next;
+ }
+
+ acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
+ status = AE_NOT_EXIST;
+
+unlock_and_exit:
+ (void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
+ return_ACPI_STATUS(status);
+}
+
+/*******************************************************************************
+ *
* FUNCTION: acpi_install_global_event_handler
*
* PARAMETERS: handler - Pointer to the global event handler function
@@ -398,6 +537,7 @@ ACPI_EXPORT_SYMBOL(acpi_install_exception_handler)
* Can be used to update event counters, etc.
*
******************************************************************************/
+
acpi_status
acpi_install_global_event_handler(acpi_gbl_event_handler handler, void *context)
{
@@ -426,7 +566,7 @@ acpi_install_global_event_handler(acpi_gbl_event_handler handler, void *context)
acpi_gbl_global_event_handler = handler;
acpi_gbl_global_event_handler_context = context;
- cleanup:
+cleanup:
(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
return_ACPI_STATUS(status);
}
@@ -498,7 +638,7 @@ acpi_install_fixed_event_handler(u32 event,
handler));
}
- cleanup:
+cleanup:
(void)acpi_ut_release_mutex(ACPI_MTX_EVENTS);
return_ACPI_STATUS(status);
}
OpenPOWER on IntegriCloud