7 files changed, 171 insertions, 29 deletions

diff --git a/drivers/acpi/acpica/evgpe.c b/drivers/acpi/acpica/evgpe.c
index 836c79b8cd1d..5ed064e8673c 100644
--- a/drivers/acpi/acpica/evgpe.c
+++ b/drivers/acpi/acpica/evgpe.c
@@ -332,6 +332,7 @@ u32 acpi_ev_gpe_detect(struct acpi_gpe_xrupt_info *gpe_xrupt_list)
         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;
         u32 status_reg;
@@ -455,14 +456,49 @@ u32 acpi_ev_gpe_detect(struct acpi_gpe_xrupt_info *gpe_xrupt_list)
                                                      acpi_gbl_global_event_handler_context);
                                         }
 
-                                        /*
-                                         * Found an active GPE. Dispatch the event to a handler
-                                         * or method.
-                                         */
-                                        int_status |=
-                                            acpi_ev_gpe_dispatch(gpe_device,
-                                                                 gpe_event_info,
-                                                                 gpe_number);
+                                        /* 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);
+                                        }
                                 }
                         }
                 }
diff --git a/drivers/acpi/acpica/evgpeblk.c b/drivers/acpi/acpica/evgpeblk.c
index ce2a7cf3a23f..e0f24c504513 100644
--- a/drivers/acpi/acpica/evgpeblk.c
+++ b/drivers/acpi/acpica/evgpeblk.c
@@ -478,6 +478,8 @@ acpi_ev_initialize_gpe_block(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
                              ACPI_GPE_DISPATCH_NONE)
                             || (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
                                 ACPI_GPE_DISPATCH_HANDLER)
+                            || (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
+                                ACPI_GPE_DISPATCH_RAW_HANDLER)
                             || (gpe_event_info->flags & ACPI_GPE_CAN_WAKE)) {
                                 continue;
                         }
diff --git a/drivers/acpi/acpica/evgpeinit.c b/drivers/acpi/acpica/evgpeinit.c
index 76705082b3db..8840296d5b20 100644
--- a/drivers/acpi/acpica/evgpeinit.c
+++ b/drivers/acpi/acpica/evgpeinit.c
@@ -401,8 +401,10 @@ acpi_ev_match_gpe_method(acpi_handle obj_handle,
                 return_ACPI_STATUS(AE_OK);
         }
 
-        if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
-            ACPI_GPE_DISPATCH_HANDLER) {
+        if ((ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
+             ACPI_GPE_DISPATCH_HANDLER) ||
+            (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
+             ACPI_GPE_DISPATCH_RAW_HANDLER)) {
 
                 /* If there is already a handler, ignore this GPE method */
 
diff --git a/drivers/acpi/acpica/evgpeutil.c b/drivers/acpi/acpica/evgpeutil.c
index c369b1997632..3a958f3612fe 100644
--- a/drivers/acpi/acpica/evgpeutil.c
+++ b/drivers/acpi/acpica/evgpeutil.c
@@ -324,8 +324,10 @@ acpi_ev_delete_gpe_handlers(struct acpi_gpe_xrupt_info *gpe_xrupt_info,
                                                                  ACPI_GPE_REGISTER_WIDTH)
                                                                 + j];
 
-                        if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
-                            ACPI_GPE_DISPATCH_HANDLER) {
+                        if ((ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
+                             ACPI_GPE_DISPATCH_HANDLER) ||
+                            (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
+                             ACPI_GPE_DISPATCH_RAW_HANDLER)) {
 
                                 /* Delete an installed handler block */
 
diff --git a/drivers/acpi/acpica/evxface.c b/drivers/acpi/acpica/evxface.c
index 6d04ae944bda..81f2d9e87fad 100644
--- a/drivers/acpi/acpica/evxface.c
+++ b/drivers/acpi/acpica/evxface.c
@@ -51,6 +51,16 @@
 
 #define _COMPONENT          ACPI_EVENTS
 ACPI_MODULE_NAME("evxface")
+#if (!ACPI_REDUCED_HARDWARE)
+/* Local prototypes */
+static acpi_status
+acpi_ev_install_gpe_handler(acpi_handle gpe_device,
+                            u32 gpe_number,
+                            u32 type,
+                            u8 is_raw_handler,
+                            acpi_gpe_handler address, void *context);
+
+#endif
 
 
 /*******************************************************************************
@@ -76,6 +86,7 @@ ACPI_MODULE_NAME("evxface")
  *              handlers.
  *
  ******************************************************************************/
+
 acpi_status
 acpi_install_notify_handler(acpi_handle device,
                             u32 handler_type,
@@ -717,32 +728,37 @@ ACPI_EXPORT_SYMBOL(acpi_remove_fixed_event_handler)
 
 /*******************************************************************************
  *
- * FUNCTION:    acpi_install_gpe_handler
+ * FUNCTION:    acpi_ev_install_gpe_handler
  *
  * PARAMETERS:  gpe_device      - Namespace node for the GPE (NULL for FADT
  *                                defined GPEs)
  *              gpe_number      - The GPE number within the GPE block
  *              type            - Whether this GPE should be treated as an
  *                                edge- or level-triggered interrupt.
+ *              is_raw_handler  - Whether this GPE should be handled using
+ *                                the special GPE handler mode.
  *              address         - Address of the handler
  *              context         - Value passed to the handler on each GPE
  *
  * RETURN:      Status
  *
- * DESCRIPTION: Install a handler for a General Purpose Event.
+ * DESCRIPTION: Internal function to install a handler for a General Purpose
+ *              Event.
  *
  ******************************************************************************/
-acpi_status
-acpi_install_gpe_handler(acpi_handle gpe_device,
-                         u32 gpe_number,
-                         u32 type, acpi_gpe_handler address, void *context)
+static acpi_status
+acpi_ev_install_gpe_handler(acpi_handle gpe_device,
+                            u32 gpe_number,
+                            u32 type,
+                            u8 is_raw_handler,
+                            acpi_gpe_handler address, void *context)
 {
         struct acpi_gpe_event_info *gpe_event_info;
         struct acpi_gpe_handler_info *handler;
         acpi_status status;
         acpi_cpu_flags flags;
 
-        ACPI_FUNCTION_TRACE(acpi_install_gpe_handler);
+        ACPI_FUNCTION_TRACE(ev_install_gpe_handler);
 
         /* Parameter validation */
 
@@ -775,8 +791,10 @@ acpi_install_gpe_handler(acpi_handle gpe_device,
 
         /* Make sure that there isn't a handler there already */
 
-        if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
-            ACPI_GPE_DISPATCH_HANDLER) {
+        if ((ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
+             ACPI_GPE_DISPATCH_HANDLER) ||
+            (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) ==
+             ACPI_GPE_DISPATCH_RAW_HANDLER)) {
                 status = AE_ALREADY_EXISTS;
                 goto free_and_exit;
         }
@@ -817,7 +835,10 @@ acpi_install_gpe_handler(acpi_handle gpe_device,
 
         gpe_event_info->flags &=
             ~(ACPI_GPE_XRUPT_TYPE_MASK | ACPI_GPE_DISPATCH_MASK);
-        gpe_event_info->flags |= (u8)(type | ACPI_GPE_DISPATCH_HANDLER);
+        gpe_event_info->flags |=
+            (u8)(type |
+                 (is_raw_handler ? ACPI_GPE_DISPATCH_RAW_HANDLER :
+                  ACPI_GPE_DISPATCH_HANDLER));
 
         acpi_os_release_lock(acpi_gbl_gpe_lock, flags);
 
@@ -831,10 +852,78 @@ free_and_exit:
         goto unlock_and_exit;
 }
 
+/*******************************************************************************
+ *
+ * FUNCTION:    acpi_install_gpe_handler
+ *
+ * PARAMETERS:  gpe_device      - Namespace node for the GPE (NULL for FADT
+ *                                defined GPEs)
+ *              gpe_number      - The GPE number within the GPE block
+ *              type            - Whether this GPE should be treated as an
+ *                                edge- or level-triggered interrupt.
+ *              address         - Address of the handler
+ *              context         - Value passed to the handler on each GPE
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Install a handler for a General Purpose Event.
+ *
+ ******************************************************************************/
+
+acpi_status
+acpi_install_gpe_handler(acpi_handle gpe_device,
+                         u32 gpe_number,
+                         u32 type, acpi_gpe_handler address, void *context)
+{
+        acpi_status status;
+
+        ACPI_FUNCTION_TRACE(acpi_install_gpe_handler);
+
+        status =
+            acpi_ev_install_gpe_handler(gpe_device, gpe_number, type, FALSE,
+                                        address, context);
+
+        return_ACPI_STATUS(status);
+}
+
 ACPI_EXPORT_SYMBOL(acpi_install_gpe_handler)
 
 /*******************************************************************************
  *
+ * FUNCTION:    acpi_install_gpe_raw_handler
+ *
+ * PARAMETERS:  gpe_device      - Namespace node for the GPE (NULL for FADT
+ *                                defined GPEs)
+ *              gpe_number      - The GPE number within the GPE block
+ *              type            - Whether this GPE should be treated as an
+ *                                edge- or level-triggered interrupt.
+ *              address         - Address of the handler
+ *              context         - Value passed to the handler on each GPE
+ *
+ * RETURN:      Status
+ *
+ * DESCRIPTION: Install a handler for a General Purpose Event.
+ *
+ ******************************************************************************/
+acpi_status
+acpi_install_gpe_raw_handler(acpi_handle gpe_device,
+                             u32 gpe_number,
+                             u32 type, acpi_gpe_handler address, void *context)
+{
+        acpi_status status;
+
+        ACPI_FUNCTION_TRACE(acpi_install_gpe_raw_handler);
+
+        status = acpi_ev_install_gpe_handler(gpe_device, gpe_number, type, TRUE,
+                                             address, context);
+
+        return_ACPI_STATUS(status);
+}
+
+ACPI_EXPORT_SYMBOL(acpi_install_gpe_raw_handler)
+
+/*******************************************************************************
+ *
  * FUNCTION:    acpi_remove_gpe_handler
  *
  * PARAMETERS:  gpe_device      - Namespace node for the GPE (NULL for FADT
@@ -881,8 +970,10 @@ acpi_remove_gpe_handler(acpi_handle gpe_device,
 
         /* Make sure that a handler is indeed installed */
 
-        if (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) !=
-            ACPI_GPE_DISPATCH_HANDLER) {
+        if ((ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) !=
+             ACPI_GPE_DISPATCH_HANDLER) &&
+            (ACPI_GPE_DISPATCH_TYPE(gpe_event_info->flags) !=
+             ACPI_GPE_DISPATCH_RAW_HANDLER)) {
                 status = AE_NOT_EXIST;
                 goto unlock_and_exit;
         }
diff --git a/include/acpi/acpixf.h b/include/acpi/acpixf.h
index 96e4ef3668d8..d56f5d722138 100644
--- a/include/acpi/acpixf.h
+++ b/include/acpi/acpixf.h
@@ -569,6 +569,14 @@ ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status
                                                           address,
                                                           void *context))
 ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status
+                                 acpi_install_gpe_raw_handler(acpi_handle
+                                                              gpe_device,
+                                                              u32 gpe_number,
+                                                              u32 type,
+                                                              acpi_gpe_handler
+                                                              address,
+                                                              void *context))
+ACPI_HW_DEPENDENT_RETURN_STATUS(acpi_status
                                  acpi_remove_gpe_handler(acpi_handle gpe_device,
                                                          u32 gpe_number,
                                                          acpi_gpe_handler
diff --git a/include/acpi/actypes.h b/include/acpi/actypes.h
index 453cebb430f6..b034f1068dfe 100644
--- a/include/acpi/actypes.h
+++ b/include/acpi/actypes.h
@@ -744,7 +744,7 @@ typedef u32 acpi_event_status;
 /*
  * GPE info flags - Per GPE
  * +-------+-+-+---+
- * |  7:4  |3|2|1:0|
+ * |  7:5  |4|3|2:0|
  * +-------+-+-+---+
  *     |    | |  |
  *     |    | |  +-- Type of dispatch:to method, handler, notify, or none
@@ -756,14 +756,15 @@ typedef u32 acpi_event_status;
 #define ACPI_GPE_DISPATCH_METHOD        (u8) 0x01
 #define ACPI_GPE_DISPATCH_HANDLER       (u8) 0x02
 #define ACPI_GPE_DISPATCH_NOTIFY        (u8) 0x03
-#define ACPI_GPE_DISPATCH_MASK          (u8) 0x03
+#define ACPI_GPE_DISPATCH_RAW_HANDLER   (u8) 0x04
+#define ACPI_GPE_DISPATCH_MASK          (u8) 0x07
 #define ACPI_GPE_DISPATCH_TYPE(flags)   ((u8) ((flags) & ACPI_GPE_DISPATCH_MASK))
 
-#define ACPI_GPE_LEVEL_TRIGGERED        (u8) 0x04
+#define ACPI_GPE_LEVEL_TRIGGERED        (u8) 0x08
 #define ACPI_GPE_EDGE_TRIGGERED         (u8) 0x00
-#define ACPI_GPE_XRUPT_TYPE_MASK        (u8) 0x04
+#define ACPI_GPE_XRUPT_TYPE_MASK        (u8) 0x08
 
-#define ACPI_GPE_CAN_WAKE               (u8) 0x08
+#define ACPI_GPE_CAN_WAKE               (u8) 0x10
 
 /*
  * Flags for GPE and Lock interfaces